Global CAD Mechanism Challenge

  • Proposals21
  • Close date October 31, 2022
  • Location USA

Posted on September 15, 2022

Completed - 3 months left

Challenge Description

Assist 2 Develop Challenge: CAD Mechanism

ROTATIONAL PASSIVE LOCK WITH 90-DEGREE INCREMENTS

Assist 2 Develop Challenge: CAD Mechanism Video

You have a minimum of two components, A & B, that rotate relative to each other.

You need to design a mechanism that makes it possible for component A (red) to passively lock into place relative to component B (gray) when rotated in 90 deg increments (i.e. passively locks in four equally spaced rotational positions). The passive lock should be easily overcome (rotated) by a human operator. Tip: You don’t have to reinvent the wheel; you may use products around you or the internet as inspiration. Reverse engineering is allowed. You may use different colors and geometries in your solution, you do not have to use the same exact red and gray disks above, they’re simply used to illustrate the challenge.

The CAD design can be composed of parts designed from scratch and/or downloaded hardware from a website like McMaster-Carr.

Goals:

Determine if the participant can translate written requirements into a working mechanism on CAD with motion.

In addition to submitting a CAD file, kindly explain how your mechanism is a viable solution. Concisely explain your thought process/logic in less than 2 paragraphs. You may use 1-3 images.

Estimated time to solve: 2-4 hours.

Challenge terms and conditions

The top three participants to receive cash prizes:

 

1st place: $350

2nd place: $100

3rd place: $50

 

Top submissions will also have the chance to interview with top employers.

Mentor Information

6 challenge(s) posted hire 21 participants USA
Member since: September 15, 2022
PARTICIPANT PROPOSALS (21)

Andrew Lowe

Design Director

Canada

This design proposal consists of a 3 piece assembly of low-cost injection molded plastic components. The design consists of a CAP_TOP and a CAP_BOTTOM. The CAP_BOTTOM is a sub-assembly of the CAP_BOTTOM and CAP_INNER components. This sub-assembly is designed to easily snap together to minimize costs. The CAP_INNER component is also keyed to ensure there is only one assembly orientation (not important for this design, but may future-proof additional product iterations). The CAP_TOP also snaps together with the CAP_BOTTOM allowing for rotation. A touch of pre-load on the plastic snap fits provides a secure fit for the rotating components.

The design is able to index into 4x unique positions situated 90 degrees from each other. This indexing is accomplished through 4x flexible plastic arms on the CAP_INNER that click into detents on the “CAP_TOP”. Generous lead-ins in both rotational directions allow the two CAP halves to work in either direction and be easy to rotate out of the 4x fixed locations. The flexible plastic arms have been made as long as possible to ensure an adequate number of cycles and the plastic does not permanently deform over time.

The design of these components has been optimized for injection molding. The CAP_INNER component has been separated from the CAP_BOTTOM to minimize the number of undercuts if the two parts were combined. The CAP_BOTTOM has 4x snap hooks that engage with the CAP_INNER. These details currently require lifters, but could also be shut-off molded, however, this would introduce holes on the outside of the part. The CAP_TOP also has 4x snap hooks allowing it to be assembled to the CAP_BOTTOM. These details are also formed with lifters, but could also be revised to a shut-0ff style design.

This design presents a low-cost solution to the brief that could scale into extremely high volumes if so desired (and tooling costs were accounted for). Alternatively, the design is sound for many forms of additive manufacturing. This design is not well suited for machining in its current form.

The choice of injection molding and developing the mechanism with geometry, as compared to off-the-shelf components gives the utmost flexibility to define the feel of the rotation, the feel of the snaps, and the exact amount of force required to actuate the mechanism. With an open-ended brief such as the one provided, it is always desirable to build flexibility into the design so that product features can be precisely dialed in.

Assist 2 Develop Inc
Score - 9 - Understood the assignment well and the requirements for the mechanism - few parts used (which is good) - Clear explanation - Good understanding of the manufacturing processes involved - good poke-yoke design to prevent incorrect installation - Minimal parts needed to fasten -Great design with easy-to-understand assembly. Complex part manufacturing but once made, the assembly is poke-yoke to only be assembled in one way. " + Well thought-out design/explanation + Requirements understood + Poka-Yoke + Adjustable/tweakable inner ring - Fastening features difficult to mold / special tooling + Designed for molding - Inner ring could be loose and rattle/move" -Good understanding of requirements - Good explanation -DFM and DFA thought out - Low part count -No hardware required -Could be difficult to take apart"

13 year(s) experience

0 challenge(s) worked

David Gardner

Mechanical Designer

USA

Mechanism consists of 2 parts, snap fit together, with a ratcheting system to enable rotation passively locking every 90 degrees.

Assist 2 Develop Inc
Score - 8.5 " + Well thought-out design/explanation + Requirements understood + No hardware + Designed for molding/ machining - Parts heavy thick - Fastening features difficult to mold / special tooling" -Well-thought-out design to keep the use of hardware down (none at all). Parts look robust and able to be replaced. Fatigue will have to be accounted for in the pawl design but the thickness of the parts seems to take this into account. Assembly looks to be easy as well as service or replacement of parts. "Good understanding of requirements Good explanation DFM and DFA thought out Low part count No hardware required" - Understood the assignment well and the requirements for the mechanism - Design would work well for the needed application - Simple two-part design with features to hold itself in - Parts can be injection molded - Explanation of how the device works is a bit unclear and took multiple reads to understand fully

8 year(s) experience

0 challenge(s) worked

Ahmed Hasan

Process Engineer

USA

My submission attempts to use as few parts as possible, and those parts should be readily available or easy to manufacture. In terms of readily available parts, I used a set screw and a flanged button head screw from McMaster Carr that are inexpensive and available in large quantities. The screws will need helicoils (I haven’t included them in the CAD) so as not to damage the threads of the plastic parts. I’ve used a small spring for my locking mechanism which should be easily procurable. There are three parts that need to be manufactured, and I made sure to use simple shapes (rectangles and circles) to simplify the manufacturing process. The most complicated shape I have is the groove in which the hook locks, which is filleted and angled to allow for the hook to move into and out of it quickly. In this sense, I believe that my design will be easy to build.

The mechanism is relatively simple. There are four grooves in component B at 90-degree angles. The grooves are for the hook, which is pushed into the groove by the spring above it. The spring’s strength can be adjusted by the set screw. When rotating the part, the hook will slide along the filleted sides of the groove and easily pop out of the slot. What’s more, this mechanism can turn both clockwise and counterclockwise. Hence, I believe that this mechanism can be easy to use and adjust.

I will include the videos and files in the zip folder. Thank you.

Assist 2 Develop Inc
Score - 8.25 "- Understood the assignment well and the requirements for the mechanism - Design would work for the needed application - Parts look easy to service - Potential issue of unscrewing the fastener holding the parts together, or over-tightening the two pieces such that rotation is not allowed - Explanation of how the parts are held together is a little fuzzy" -Love this design idea. Simple parts, easy to understand, and assemble only one way. Looks to be serviceable easily as well. " + Well thought-out design/explanation + Requirements understood - Parts heavy thick - Hardware + COTS hardware - Torque control is required for the main shaft/screw + Adjustable spring force" -Requirements understood -Good explanation -Simple design -Could be difficult to assemble -Hardware required"

1 year(s) experience

0 challenge(s) worked

PRASOON PRADEEP

DESIGN ENGINEER

India

Hi I’m Prasoon,

Here I submit a simple proposal which uses a wedge mechanism & spring lock.

Hope this will suffice all the requirements.

Regards,
Prasoon

Assist 2 Develop Inc
Score - 8.25 "- Prasoon understood the assignment as well as the requirements - One thing that stood out to me was that he focused on only direction of rotation - This is OK, according to the requirements. There was no requirement for bi-directional motion. Prasoon used that to his advantage - His explanation was well and succinct. - The design of his is simple, easily manufacturable via injection molding, CNC, or by 3d printing - The presentation and use of images are easy to follow and understand - Overall, I think Prasoon did a spectacular job on this - one of the best I have seen from the group - One note: One way to simplify tolerances and manufacturing would be to have the end lock secure to the fixed lock via screw and wave or split washer - This would allow for the fixed lock to be much looser in tolerances" -Great design with easy-to-understand assembly. Parts are simple and easy to manufacture and assemble. " + Well thought-out design/explanation + Requirements understood - Parts heavy thick + COTS hardware" -"Requirements understood -Good explanation -Easy to assemble -Hardware required"

4 year(s) experience

0 challenge(s) worked

ROSHAN JOSEPH

Jr. Design Engineer

India

The simplest method for this mechanism is to use a spring loaded wedge or simply using a ball plunger. Ball plungers are available in almost any size we want, so this model is also scalable to any disc size we want. I have developed two models in which I have used a spring loaded wedge on one, and a ball plunger on the other. The working mechanism is very simple- the spring loaded part ( wedge or the ball) gets trapped in the groove provided on second disc, and escapes the groove when rotated , with the spring compression. Both models are designed considering the factors- scalability, and easy manufacturing and assembly. I have included both my design models and the explanation in the zip file I am attaching here.

Assist 2 Develop Inc
Score - 7 -Good design thought. Easy to assemble. Would require some work instructions regarding torque specs of screw. + Well-thought-out design/explanation + Requirements understood - Parts heavy thick - Hardware + COTS hardware - Torque control required for the main shaft/screw "Requirements understood Good explanation Could be difficult to assemble High part count Hardware required"

1 year(s) experience

0 challenge(s) worked

Rafał Stolarek

engineer

Poland

The button has 4 positions in which it can be locked.
Turning involves pressing the button, which interacts with the spring, then turning it to one of the 4 positions(in 90 degree increments).
Releasing the button, the spring pushes back the knob which locks its position through the shaped sockets.
The second option for turning is to use more force to turn it. Thanks to the shape of the sockets, by using more force, the button itself can compress the spring and this will allow the knob to turn.

Translated with www.DeepL.com/Translator (free version)

Assist 2 Develop Inc
Score - 7 -The part complexity will require extensive manufacturing and tooling but good job. " + Well thought-out design/explanation + Requirements understood - Parts heavy thick - Hardware + COTS hardware + Adjustable spring force - Complex tooling required/threads" "Requirements understood Good explanation Complex parts Hardware required No feedback when the next location is reached could skip"

4 year(s) experience

0 challenge(s) worked

Chris Bulen

Senior Mechanical Engineer

USA

For this project, some assumptions were made as they were not spelled out in the project constraints:
1) The grey part of the mechanism would be stationary, possibly part of the panel of some machine, and the knob is used to make a selection setting on the machine.
2) The stationary part of the mechanism need not be round as the project constraints state that the geometries can be changed. I assumed the grey, stationary part would be metal.
I made the rotary knob plastic (probably ABS), and is designed to be injection molded or 3D printed, and is approximately 2 inches in diameter to make it easy and comfortable to grab. Indexing marks are molded into the knob and cut into the stationary grey metal part B for the operator to reference during use. The knob has molded knurling in the outer edge for grip. It is drafted relative to parting line and has no undercuts relative to parting line simplifying the mold needed to make this knob, making the mold less expensive. It is hollowed out as per best practices for injection molded plastic parts.
For the passive locking mechanism that occurs at every 90°, inexpensive and easy to obtain spring loaded ball nose plunger (McMaster PN 2191A261) is used along with molded in spherical detents on the back side of the red, molded knob. I used 2 plungers, each at 180° from each other to balance out the forces, as using a single plunger would result in asymmetric forces causing the knob to be crooked and/or the center hole would wear abnormally over time.
I designed all the parts of this assembly to be easy to manufacture. For example, the ball spring plungers are mounted parallel to the center axis instead of being mounted radially. In Part B, the single hole and the detent spherical holes can all be machined from a single setup on the CNC. If I had arranged the spring plungers radially, it would make machining the holes much more difficult, and would require additional setups, a 4th axis or special fixturing.
The advantage of using the spring plungers is that they can be adjusted to provide more or less “holding force”. This means the force required to rotate the knob can be adjusted. It can also be adjusted to account for wear.
An inexpensive, $3.00 thrust bearing is used along with the shoulder screw, to keep the knob rotary friction consistent over time, preventing wear.
Because the knob is plastic and is retained by the shoulder screw, and threads tend to easily tear out of plastic, a metal threaded insert (McMaster PN 94180A353) is molded in place (or heat staked after the knob is molded or 3D printed).

Assist 2 Develop Inc
Score - 7 -Well thought-out design with the 2 pins equidistant. Looks easy to assemble and manufacture. Might want to consider a chamfer or fillet on the holes to allow pins to engage smoothly. " + Well thought-out design/explanation + Requirements understood + COTS hardware - Leading to detent holes may be needed + Thrust bearing helps + Designed for molding/ machining" "Good understanding of requirements Good explanation Robust design Could be difficult to rotate Hardware required"

14 year(s) experience

0 challenge(s) worked

Denjing Tamang

Mechanical Engineer / Designer

India

I enjoyed a lot solving this challenge. I have uploaded my solution for the challenge in this zip file.
Hoping for many more such challenges in upcoming days.

Assist 2 Develop Inc
Score - 7 -Well thought out. Having the outer rotating portion springloaded is a good thought to keep engagement. The extruded portions would likely wear down and the whole outer part would have to be replaced if that is the intended design. " + Well thought-out design/explanation + Requirements understood - Parts heavy thick + Adjustable/tweakable innerspring + COTS hardware - Hardware" "Requirements understood Good explanation Simple Parts bulky Hardware used"

2 year(s) experience

0 challenge(s) worked

Shaik Nasrullah Shareef

Mechanical Design Engineer

India

Thank you for this oppurtunity,
The description for my design is as follows,
The spherical ball end parts travel through the groove (in Part B ) and lock in place every 90 degrees. The locking mechanism
can be overcome with little force by rotating it.
The design of the groove is such that it does not allow for the back wards movement.
the pin and slot sliding mechanism is has been used for ease in assembly of the product as well as for allowing linear movement in a confined and precise manner in the slot
the ball bearing and the spring is downloaded from traceparts.
These parts can be made using 3D printing.
Furthermore, we optimise the design by providing drafts and material flow analysis in the mold for injection molding process.

Assist 2 Develop Inc
Score - 6.3 -Good design with the spring and pin with ramp. Looks to be a deep engagement in the hole which would be hard to overcome by hand unless the spring is spaced with the correct rating. " + Well thought-out design/explanation + Requirements understood - Difficult to assemble - Complex tooling if molded - Parts heavy thick - Bearing overdesigned + Anti-rotation features - Too much pin engagement, would not turn/pins shear" "Requirements understood Good explanation Could be difficult to assemble Could be difficult to rotate Parts bulky Hardware required"

2 year(s) experience

0 challenge(s) worked

MUHAMMAD NIYAS P

B-Tech in Mechanical Engineering

India

Hello. First of all THANK YOU for the challenge. as a part of it i learned few things. i am going to introduce a simple concept which include two parts . through out the process keeping the requirement in mind my one of the main objective where make the concept as simple as possible.

Assist 2 Develop Inc
Score - 6.6 -Interesting take on this design. It meets functional requirements but seems to be prone to fatigue wear of the flexible ribs. Likely a replaceable unit in the field that is sacrificial. " + Well thought-out design/explanation + Requirements understood - Complex tooling if molded + No tools/fasteners - Possible fatigue - Parts heavy thick" "Good understanding of requirements Good explanation Low part count Interesting design Could be difficult to mold Could have a short lifecycle No hardware required"

1 year(s) experience

0 challenge(s) worked

SULAIMON OLANREWAJU

CSWA, CSWP

UK

The locking mechanism used here is a simple one which involves
a container (A) and a cover (B). The container has a lock plug that is
flexible enough to bend a little when the cover is connected. Turning
the cover clockwise or anti-clockwise should make the locking socket
locate the plug immediately.
This design is made such a way that the plug is filleted well to ensure
smooth sliding in and out of the socket. Therefore, with increments of 90
degrees, both parts meet in a locking position.

Assist 2 Develop Inc
Score - 6.3 -Decent design for a capped object. The bendable tabs will be prone to fatigue over the lifespan of the object. What keeps the line from moving up and down on the vessel? Is it only the detents? " + Well thought-out design/explanation + Requirements understood - Nothing holding the assembly together - Fastening features difficult to mold / special tooling" "Good understanding of requirements Good explanation Low part count No hardware required Needs a feature to capture the lid"

5 year(s) experience

0 challenge(s) worked

Krishna Prasanth T

Mechatronics Engineer

India

Hello! This is Krishna Prasanth pursuing Bachelor’s in Mechatronics Engineering. I have been worked on many events from SAE e-Baja to Mega ATV Championship. The area where I was working gave me more exposure to the mechanisms and how they actually work. Currently, I’m working as a Project Associate at Rane (Madras) Ltd. for implementing automation design at the plant which produces steering systems for automotive companies.

The mechanism I have tried is capable of being able to manufacture easily. And the cylinders are also able to rotate in both clockwise and counterclockwise.

Assist 2 Develop Inc
Score - 6.5 Krishna understood the assignment well and the requirements for the mechanism - The design uses few parts and is pretty simple in design (which is good! The fewer parts there are, the less that can break!) - The red part is easily manufacturable - The gray part looks a little difficult to manufacture using traditional methods such as subtractive manufacturing due to the ramp - It looks like the flexible ball slider is a custom piece - If so, that would be pretty difficult to manufacture, and would likely require a casting process in metal to ensure the needed ductility - Currently, the central screw holding the two parts together has no clear way to set a distance from one another - This could cause no connection between the ramp and the ball, or too much flexion in the ball causing undue stresses - His explanation and presentation however were very easy to understand and follow - Overall, a great job by Krishna on this design, albeit some of the design decisions were fuzzy" -Good start with this design. The flexible tab would likely need to be patterned to have some strength in locking the mechanism in place. The base piece would need post-machining after molding. " + Well thought-out design/explanation + Requirements understood - Nothing holding the assembly together - Parts heavy thick + Adjustable/tweakable inner snap" "Requirements understood Good explanation Parts bulky Parts could bind Hardware required"

3 year(s) experience

0 challenge(s) worked

Martin Osores

Avionic Technician

Mexico

Hello there! I´m Martin. First of all thanks for this opportunity, I hope you like the mechanism I’ve been working on.

Initially I started taking a piece of paper and a black pen, my first goal was to sketch at least a viable and working solution. However, I wasn’t satisfied with the results of the first couple of ideas. So suddenly the functional principle of a ratchet wrench came to my mind out of the blue, then this drove me to think of a third and chosen idea.

The way this system works, it’s pretty simple. It consists of four main parts: piece A, piece B, a little ball, and a spring. The first piece contains the string and the tiny ball, while the second one has four slots sized for the ball. When the piece A is rotated, the spring retracts, unlocking the mechanism so both pieces can be swung around 90 degrees in both directions, till the other locking position is met.

Assist 2 Develop Inc
Score - 6.25 "Requirements understood Good explanation Low profile Could be difficult to assemble High part count Hardware required" " + Well thought-out design/explanation + Requirements understood - Difficult to assemble - Parts heavy thick + COTS hardware - Torque control required for main shaft/screw" Decent design for the concept. Meets the requirements but the small spring and ball assembly will be difficult as well as the serviceability of the components. "- Martin understood the assignment well as well as the requirements - This mechanism is simple and a clever approach to the design - Easily machineable, secure - His explanation was good, I like how he discussed his thought process on the design - very useful! - His images were a little lacking overall - there was no way to tell that the mating piece for the ball had areas for the ball to sit every 90° without opening up CAD - The presented materials should clearly indicate how the parts come together and how the mechanism works - not to rely on CAD - The way to secure the two pieces together via a fastener could be tightened too much, and cause difficulty in rotating the pieces - A way to re-design this would be to have a partially threaded fastener such that there is slight clearance to allow for the parts to rotate - Overall, a great job, some minor presentation and useability items that knocked him down a bit"

3 year(s) experience

0 challenge(s) worked

Cherif Bali

Professional SOLIDWORKS | Electronics Engineer

France

Hello,
this is my simple proposed mechanism, a sliding ball pushed by the string assembled in a cylindric hole in part B, the sliding is locked in one direction and the sliding ball is locked every 90° but still easy to overcome by just rotating,

Thank you for this opportunity 🙂

Assist 2 Develop Inc
Score - 5.5 "Requirements understood Interesting design Simple Lacking features to hold the assembly together Parts bulky" " + Well thought-out design/explanation + Requirements understood - Nothing holding the assembly together - Parts heavy thick + COTS hardware - Nothing forcing ball to move other than spring force" The design is complete but needs some more refinement as the parts can come apart axially. The indents can only go in one direction of rotation. "- Cherif has a simple and clever design for the approach - All components could be 3D printed or injection molded and the ball & spring can be purchased COTS - His explanation was easily understood. - However, there is no way to secure the two parts to one another - therefore the spring and ball are no longer useful - There is no way to secure the spring to the base of the gray part - A central screw through the body, or similar, to connect the two together would drastically improve the design - Scoring a little bit lower since the design is incomplete with respect to the requirements"

4 year(s) experience

0 challenge(s) worked

Press release button with turn function and return spring
90 degree as wished , when released locked in 0/90/180/270 position
when engaged and turned then in non the above and via versia.

Assist 2 Develop Inc
Score - 5.25 "Requirements understood Robust design Could be difficult to manufacture" " + Requirements understood - Difficult to understand the concept - No CAD data to review - Complex + Assembly threads hold together" The design is complete but difficult to rate as there is no cad data to explore. "- He clearly understood the assignment and requirements for the mechanism - Overall, his parts look manufacturable from what I could see in the images - The part looks able to be rotated every 90 degrees and can be done by hand - Cycle count does not seem to be an issue here as well - The explanation of how the parts work is a little confusing - I think I know how they work, but am not sure - His paragraph explanation was confusing as well, although I am not to dock him on that since English may not be his native language - Overall, I think he did a good job. - What he could improve in is his explanation and presentation of ideas. A gif/video/or more images would have been helpful in conveying his ideas"

year(s) experience

0 challenge(s) worked

Hamza Pervaiz Alam

Inventor, Designer, Project Engineer

Bahrain

Hi!
So my solution is it to parts have an annular snap fir joint which facilitates a rotational joint. As for the 90 Degree snap motion, I have worked to design a simple 4-lobbed male and female part with spacing to facilitate locking points, and if force is applied the lobes interfere with each other as opposing torque is applied to the two parts. Once 90 Degrees turn is complete, the interference zone ends, and the parts snap into the free space. The parts are designed to be 3D printed, in my Prusa, so that is the manufacturing process kept in mind when designing the parts. A little lubricant like petroleum jelly can help a slide when the lobes interact.

Assist 2 Develop Inc
Score - 5.25 "Requirements understood Good explanation Low part count The fit would be loose Would be difficult to turn No hardware needed" " + Requirements understood - Parts heavy thick - Nothing holding the assembly together - Inner boss would need to collapse to turn - Fit would be sloppy/loose" The design is incomplete as the parts can come apart axially. The two pieces will snap and index on each other. "- He understood the assignment well as well as the requirements - His explanation was quite sound and helped me better understand his mechanism - The images he provided were helpful in his explanation - These parts can be manufacturable on the 3d printer, and even a CNC or lathe given the ability to perform some undercuts - The notch on the female part's central shaft that holds the part into the male part - This may be pretty difficult or impossible to install into the male part, as it appears that it is locking - A way to redesign this could be by treating the notch as a third part, or implementing a bearing w/ a press fit - The design itself requires pretty tight tolerances in order for the user to rotate the part - If made from a strong material, such as steel, the female part would need to be considerably thinned out - Depending on the lobe shape of the male and female parts, the slope at each 90° increment could be pretty large. This is not a requirement however - For the 2-4 hour time, I think Hamza did a great job. I wouldn't expect tolerancing to come into play for this length of the project"

7 year(s) experience

0 challenge(s) worked

Greetings,

I’m KOUSHIK, experienced and certified professional in mechanical design with AutoCAD, Solid work & Catia. Expertise in Product design, Sheet Metal Design, Custom Enclosures, Drafting, Product Documentation and Reverse Engineering.

Thanks for the opportunity.
I have attached all the related files required.

Assist 2 Develop Inc
Score - 2.3 -A unique take on the locking mechanism. The locking area of the base looks to be prone to fatigue. The axial movement of the two pieces could be a design issue in certain situations. " - Requirements not understood /met - No indexing" "Requirements not understood Interesting design Low part count No hardware required"

year(s) experience

0 challenge(s) worked

Ricardo Junges

Projetista SolidWorks

Portugal

Sou do Brasil (mas não tem a opção do meu país para selecionar)
O conjunto proposto é do tipo “macho” e “fêmea”.
O mecanismo adotado é composto por um duplo encaixe semicircular, que após as peças apoiadas uma sobre a outra, faz-se o giro de 90 graus da peça vermelha (macho), que executa o travamento através de elementos cônicos de ajuste preciso.
Proponho peças plásticas obtidas por impressora 3D.
Assim pode-se experimentar a melhor composição química e alcançar boa precisão de medidas para garantir o ajuste (travamento), além de viabilizar uma produção em série

Assist 2 Develop Inc
Score - 2 "- Ricardo did not fully understand the requirements of the mechanism - The parts only rotate 90 degrees with respect to one another once - His explanation was good for the part he designed - The part designed is a nice locking mechanism, but does not meet the challenge requirements thus the low score - General feedback on the locking mechanism - This would be difficult to manufacture on anything that is not additive manufacturing - Recommend to break out the ""L"" shaped parts from the locking mechanism into separate pieces, then secure those to the base via screws/adhesive/press fit/etc - Breaking up into a couple more components could simplify manufacturing options and cost if done in production" Need further development to allow the part to index completely in 90-degree increments. " - Requirements not understood /met - No indexing/lock" "Requirements not understood No locking mechanism"

15 year(s) experience

0 challenge(s) worked

Krunal Dhaygude

Mechanical Engineer

India

Hello
I Modeled the Lock Mechanism System in Solidworks 2018 in the challenge you have given a couple of Drawing Sheets. I used that sheet as a reference and for the dimensions, I have drawn some basic Freehand drawings for a self-help Purpose.
Also, I learn lots of new things in this challenge so thanks for Organising this challenge

Regards,
Krunal Dhaygude.

Assist 2 Develop Inc
Score 1.6 (stars incorrect will edit) -Need further development and having the files attached would assist in the understanding of the design. Good start. " - Requirements not understood /met - No indexing/lock" "Design seems incomplete More detail needed"

0 year(s) experience

0 challenge(s) worked

Ashish Palankar

CAD Designer | Product Designer | Aeronautical Engineer

India

Greetings,
Thanks for providing me this opportunity, My name is Ashish Palankar pursuing Aeronautical Engineering with excellent problem-solving skills and ability to perform well in team. Passionate about designing and enjoy learning new things. Proficient in Autodesk Fusion 360, AutoCAD, Ansys Fluent etc. Designed and Developed many CAD models, worked with many projects and also participated in many competition.
I have designed this to improve my Innovative skills in design because “Every Innovation starts with a Design”.

Assist 2 Develop Inc
Score - 1.6 "Requirements not understood No locking mechanism" " - Requirements not understood /met - No indexing/lock" Need further development to allow the parts to index completely in 90-degree increments.

3 year(s) experience

0 challenge(s) worked


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MEHTAB

Mechanical Design Engineer

India

Mehtab Alam
Mechanical design engineer
Linkdin: https://www.linkedin.com/in/mehtab-alam-b7395113a/

mail: amehtaba160@gmail.com

about project:
Hye i made two disk and these insert into each other and then rotated. the have a bulge which snaps into the cut when rotated. once it snaps it cant move unless some rotational force is applied in opposite direction.
the video explains the whole mechanism.
the files can be downloaded from here
the link contains videos, files, step files, solidworks files and assembly

https://drive.google.com/file/d/1hXZZqs1uly6MMFnMSpXvb070gqbJNTsm/view?usp=sharing

Assist 2 Develop Inc
Judges couldn't open your file.

4 year(s) experience

0 challenge(s) worked