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# Final Mechanical Refinement & Prototype Validation I already have a complete CAD design for a premium automatic magnetic dog collar locking mechanism. The main engineering work has already been completed, so this is **NOT** a redesign project. I'm looking for someone with strong mechanical design experience to perform the final refinements and validate the design with a real printed prototype. I will provide all CAD files created by my current engineer, along with photos/videos of the printed prototype and the issues I found. ## Current Issues * The button does not protrude enough and is difficult to press comfortably. * The locking mechanism works, but I want it to be significantly stronger. * Once locked, it should not accidentally release under very high pulling force. * The locking pin and locking geometry may need small refinements (engagement depth, locking faces, angles, width, etc.) to maximize strength. * The enclosure fit and tolerances should be improved so both halves align perfectly with almost invisible gaps when assembled. * The snap-fit should assemble smoothly without feeling like the enclosure might break. * The design also includes magnets intended to help guide the two halves together and improve self-alignment during closing. Please evaluate whether they should be included in the final design or if the mechanism would perform better without them. I value your engineering judgment. * Overall, I want the mechanism to feel premium, precise, smooth, and solid. ## What I Need * Review the supplied CAD files. * Make only the necessary refinements. * Print the updated prototype (standard FDM printing is completely fine). * Assemble the mechanism with the required hardware, including springs and magnets if needed. * Verify that everything works correctly. * Record a short video showing: * Button operation. * Locking and unlocking. * Pull test demonstrating that the lock remains secure under heavy force. * Overall assembly quality. * Send me the updated CAD files (only if modifications were made). ## Goal When the two parts are connected, they should align perfectly with minimal visible gaps, produce a satisfying solid **"click"**, remain securely locked under heavy pulling force, and only release when the button is intentionally pressed. I'm looking for someone who enjoys refining mechanisms and paying attention to small engineering details. **Budget:** Around **$20 USD**, since the design is already completed and this stage focuses on refinement, testing, and validation. If everything goes well, there will be additional paid work afterward, including exterior styling, manufacturing optimization, and preparation for production.
Project ID: 40547399
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Hy, I am mechanical engineer having experience in 3D CAD modeling ready for 3D Printing and CNC using Solidworks. I can optomize your ready model, if you have Solidworks file i can easily edit them. If not still you can share me the files in chat. Thanks
$20 USD in 2 days
5.1
5.1
14 freelancers are bidding on average $20 USD for this job

Hi, I specialize in refining functional mechanisms for 3D printing and prototyping. I can review your existing CAD files, improve the button ergonomics, strengthen the locking geometry, optimize tolerances and snap-fits, evaluate the magnet-assisted alignment system, and ensure the mechanism delivers the precise, premium feel you are targeting. I’d be happy to share samples of similar mechanical refinement and prototype-focused projects directly here in the chat. Just send over the CAD files, prototype photos, and test feedback, and we can get started right away. Looking forward to working with you!
$20 USD in 1 day
4.8
4.8

This part is relatively simple for me; I've been using PTC/Creo for product design since 2008. If you don't mind the software, I can accept your invitation anytime. I will provide CAD files (DWG or DXF) and printable PDF files on time and complete the task within the specified period. I'd be happy if you contacted me.
$20 USD in 7 days
4.8
4.8

With extensive experience in 3D modelling, mechanical engineering and product design, I am confident that I can take your existing CAD design for the automatic magnetic dog collar locking mechanism to the next level. Having worked with software like Solidworks and having a thorough understanding of FDM printing, I am familiar with both the theoretical and practical aspects of refining mechanisms. I understand the importance of the smallest details for a project like this. Whether it's improving button protrusion for comfortable pressing or enhancing locking geometry to maximize strength, I am committed to making this mechanism feel truly premium, precise, smooth, and solid in terms of both function and aesthetics.
$36 USD in 1 day
5.3
5.3

Hello, I hope this message finds you well. My name is Rade, and I am a mechanical engineer based in Belgrade, Serbia, with over nine years of experience in the field. I have completed many projects throughout my career, primarily utilizing SolidWorks software. My portfolio showcases several projects across various sectors, including the military, food, and pharmaceutical industries. Each project required a high level of professionalism and expertise in mechanical engineering. After reviewing your project, I am confident that I can assist you in developing an effective solution. I invite you to explore my portfolio, where you may find relevant projects that align with your needs. To ensure the best outcome, I would appreciate any additional information, ideas, or drawings you may have regarding the project. This will help me gain a deeper understanding of your specific goals. I look forward to collaborating on this project and future endeavors. Best regards, Rade
$20 USD in 7 days
4.2
4.2

Hey, I can refine your existing locking mechanism to improve button feel, locking strength, enclosure fit, and overall performance without redesigning the entire assembly. I'll review the CAD files, make only the necessary mechanical adjustments, validate the updated design with a printed prototype, and provide a test video covering operation, pull strength, and assembly quality. You'll receive the updated CAD files if changes are made, along with a validated prototype ready for the next stage of development. Could you share which CAD software the design was created in and whether the prototype has already been printed in the final material?
$15 USD in 1 day
3.3
3.3

Hi, I read through your project for Dog Collar Lock Mechanism Refinement. You need help with dog collar lock mechanism refinement. I can build and deliver this efficiently based on the job requirements. This fits well with my experience in 3D Modelling and Mechanical Engineering. I can take what you outlined and turn it into a clean final delivery, with attention to 3D Modelling and Mechanical Engineering and the details in your brief. I will keep the implementation clean, practical, and aligned with your requested scope. Send me the details and I can start immediately.
$10 USD in 1 day
3.0
3.0

As a seasoned mechanical engineer with a strong background in 3D modeling and printing, I believe I'm the ideal candidate for your dog collar lock mechanism refinements project. My extensive experience with CAD and engineering software such as Solidworks, Fusion 360, and Autocad aligns perfectly with your project needs. Upon reviewing the CAD files, I'll be able to efficiently identify and address the issues you've highlighted, incorporating any necessary modifications for optimal performance. Throughout my professional journey, I have garnered essential skills and attention to detail that will prove crucial to your desired project outcome. Additionaly, my ability to deliver high-quality work within tight deadlines has consistently earned me the utmost client satisfaction. In terms of budgeting, I understand the constraints facing this phase of the project, and I am willing to make any monetary accommodation necessary from my end to make this partnership work harmoniously. Further down the line, you can also rely on me for exterior styling, manufacturing optimization, and production preparation, aspects that link firmly with my scope of expertise. Let's collaborate; together we will refine and validate your dog collar lock mechanism into a premium-grade product that checks all your outlined boxes!
$20 USD in 1 day
2.7
2.7

Hello there, I can review your existing CAD and refine the mechanical locking mechanism for improved strength, precision, and premium feel, focusing only on targeted adjustments rather than a full redesign. could you please share the CAD files and prototype test footage, so I can assess exactly where the button travel and locking geometry need improvement? I can handle the refinements, validate the updated prototype, and ensure the mechanism performs reliably under high pulling force within your budget. Portfolio: https://www.freelancer.pk/u/proggon Best regards, Wahaj
$20 USD in 6 days
1.7
1.7

Hi, This is exactly the kind of refinement-focused mechanical work I enjoy. Since the core design is already complete, I can focus on improving the button feel, lock strength, alignment, tolerances, snap-fit behavior, and overall assembly quality without unnecessarily redesigning the mechanism. I’ll review the CAD and prototype feedback carefully, make only the required adjustments, print and test the updated version, and provide a validation video showing locking performance, button operation, and pull-force testing. I also appreciate your focus on premium mechanical feel — the “click,” alignment, and smooth operation are often what separate a good mechanism from a great one. Happy to review the files and get started. Best regards, Deepak
$20 USD in 3 days
0.4
0.4

As an experienced mechanical designer with a deep understanding of the intricacies of CAD/CAM and SolidWorks, I am confident I can meet your needs for the dog collar locking mechanism project. The fine-tuning and prototype validation phase you require aligns perfectly with my approach to design and attention to detail. I'm passionate about honing mechanical systems to optimize their functionality and durability, a quality that will prove invaluable in addressing the complex issues with your current model. My familiarity with 3D modeling and printing, combined with my expertise in SolidWorks, will enable me to review your CAD files thoroughly, making precise refinements where necessary. Once these adjustments are determined and integrated into the digital design, I'll print an updated prototype using standard FDM printing. One aspect where I particularly shine is my ability to balance creativity with the necessary manufacturing practicalities—a proficiency that promises an increased ergonomic experience as we address the button protrusion challenge and work towards a seamless assembly experience.
$50 USD in 1 day
0.0
0.0

As an advanced systems engineer specializing in precision hardware design, refining mechanisms and paying attention to small engineering details form the core of my professional expertise. I hold a proven track record in developing highly efficient and scalable solutions, precisely the unique skill set your project demands. My intensive experience with 3D CAD modeling and parametric designs in SolidWorks will enable me to surpass the outlined project requirements. Not only am I well-versed in FDM printing, but my understanding of manufacturing optimization and preparation for production aligns perfectly with your future needs after the prototype refinement stage. By leveraging my skills, I am confident that I can address each of your current issues methodically and comprehensively. This includes enhancing the button design, ensuring a stronger yet easy-to-release locking mechanism, as well as improving enclosure fit and tolerances for a seamless assembly. It is paramount to me that all design components align perfectly with minimal visible gaps, produce an unequivocal solid 'click', remain securely locked under heavy pulling force, and release only when the button is intentionally pressed just as you envisioned. Combined with my competitive pricing and timely project delivery record, I believe my candidature precisely suits your requirements. Let's get started on this exciting venture together!
$10 USD in 3 days
0.0
0.0

With over two decades of experience in various technical industries, I possess extensive expertise in problem-solving. My background in Artificial Intelligence and Computer Science provides me with a unique perspective that can be applied to perfecting your dog collar locking mechanism. Although my specialty may not be specifically in Mechanical Engineering, my diverse proficiencies and unfaltering attention to detail enable me to offer the refinement you need. Throughout my career, I have conceptualized and implemented numerous digital solutions, ensuring precise alignment, smooth operation, and robustness. Similarly, your project demands meticulousness in addressing minute issues such as the button's comfort and the strength of the locking mechanism under high pulling force. My aim aligns perfectly with yours: create an elevated design that is both precise and premium. Choosing me wouldn't just save you money but also equip your project with unconventional insights that may revolutionize the domain. If selected, I will leave no stone unturned in delivering the refined design your dog collar deserves. Let's embark on this journey together and chart unchartered success!
$10 USD in 7 days
0.0
0.0

As someone who's passionate about mechanical design, I'm excited by the opportunity to refine and validate your dog collar locking mechanism. I have extensive experience in 3D modelling and product design using Fusion 360, which will allow me to seamlessly review your existing CAD files and make the necessary refinements to address each issue you've highlighted. A keen eye for detail is one of my strong suits, and I'll ensure that all aspects of the design are maximized for strength while preserving its elegance. My skills extend beyond just designing - I'm able to turn your latest iteration into a real printed prototype using standard FDM printing technology. This will allow for an on-hand validation process that goes beyond visualizing digital iterations. My spring and hardware knowledge will also come in useful during the assembly process so we can accurately replicate your desired product experience. To ensure trust in our collaboration, I'll follow up with a detailed video highlighting every aspect of the updated prototype, from button actuation to heavy pulling force test evidence. With my attention to detail and dedication to bringing out the best in designs, I’m confident that our end result will be everything you envision - a premium, precise, smooth and solid mechanism. Let's get started on refining this exquisite dog collar locking mechanism!
$10 USD in 1 day
0.0
0.0

Tel Aviv, Israel
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