Automobile Rapid prototypes

With the increasing pressure of automobile manufacturing, trial production is an important part of automobile development. As an important means, Rapid prototype technology is more and more applied to automobile development. The prototype can be used for visualization of CAD digital model, design evaluation, interference test, and even some functional tests.

In addition, the trial production can make users very intuitive understanding of the appearance and performance of the products that have not been put into mass production and can make timely evaluation, so that the factory can improve the products according to the needs of users and market research in time, create favorable conditions for the sales of products and avoid the loss caused by blind production.

For auto parts   prototypes, we are generally CNC processing, its advantages are reflected in it can very accurately reflect the drawings expressed information, and CNC rapid prototype surface quality is high, especially after the completion of the surface spraying and screen printing, even more than the production of products after the mold. Therefore, CNC rapid prototype manufacturing is becoming the mainstream of prototype   manufacturing industry.

Step 1: Receive the image file --1. The customer shall provide 3D image file in STP, PRT and other common formats. CATIA, Pro/E, UG commonly used drawing software can be converted format; 2.JPG or Office format process description file, renderings are preferable; 3. Vector image files in CDR, AI and other formats are used to produce film (be sure to remember to turn); 4. It is better to provide BOM list to quickly identify the manufactured parts in case of omission or overdoing;

The second step: review the drawing file -- the drawing file sent by the customer is thoroughly checked to see whether the 3D drawing has interference, broken surface, missing parts and other phenomena; 2. Check the process description and confirm the implementation analysis of various processes; 3. Check the BOM table to see whether the quantity is clear and whether any parts are missing. 4. Check the vector drawing file and check whether the ratio of the drawing file is correct; 5. Estimated production cost and delivery time according to documents provided by customers;

Step 3: Business negotiation --1. Confirm file name and file update time with designer or project leader; 2. Analyze the desired effect of customers according to professional experience, and assist customers to solve problems; 3. Analysis of process executability and differences in final realization; 4. Product quotation, confirmation of delivery time, location and delivery method, and formulation of hand-made contract to be confirmed by customers in writing.

Step 4: Split the file --1. Review the integrity of the 3D file; 2. It is convenient to make parts according to the product process and CNC carving and milling habit. Ensure that the appearance of the product is not affected;

The fifth step: CNC programming --1. According to the processing method to write CNC engraving and milling path; 2. Reserve raw materials according to product process; 3. Set tool type and processing speed according to material characteristics; 4. Prepare CNC cutting and milling path and cutting and milling speed according to equipment performance.

Step 6: Prepare materials --1. Select materials according to the process description and BOM form provided by the customer; 2. According to the material size marked by the programming engineer;

Step 7: CNC machining --1. Transfer the data edited by the programming engineer to the CNC machining center; 2. According to the program sheet, select the corresponding tool to adjust the tool and carve and mill processing;

Step 8: First check --1. Return the finished parts to the programmer to count the quantity and ensure the quantity is accurate; 2. Each finished product is measured with calipers to ensure that the drawing file with the customer is within the tolerance range; 3. Check whether the material of the parts is consistent with the POM table provided by the customer;

Step 9: rough assembly - because of the existence of CNC processing congenital defects, the structure of the clear Angle can not be fully in place, almost so the carving and milling out of the workpiece need to be manually chiseled with specific tools, and then adjust the assembly relationship. This link must do respect engineer design drawings, otherwise in order to cooperate and cooperate it is difficult to check the problems existing in the design, easy to cause the hand plate assembly is very good, but the product of the injection mold can not be assembled. As a rigorous artisan, if you find interference in the design itself, you must mark it clearly and send it back to the designer for improvement

Step 10: Grinding and polishing --CNC machining products will have knife marks on the surface, the appearance of each hand board needs to be polished by hand. And this process is very intuitive to reflect the quality of a hand plate good or bad. 1. Choose sandpaper and polishing wax with different characteristics according to product type and material; 2. Carefully check the 3D drawing file, analyze the key points of the appearance of the product, and accurately reflect the corners, lines and gaps of all parts as far as possible; 3. The parts that need to be electroplated on the surface must be polished manually to reflect the effect of the mirror after electroplating;

Step 11: Oil injection/plating/anode -- the biggest advantage of CNC handboard is that its surface effect is closer to the final mass production effect, which is impossible to achieve SLA. Even 3D printing technology is inferior to CNC handboard model in surface treatment. 1. Adjust colors according to the color palette or PANTONE according to the process instructions provided by the customer; 2. Spray good products in the oven to bake, according to the characteristics of the material, paint baking time will change; 3. Dry the paint and then spray UV on the surface. UV can not only play the role of protection and reinforcement, but also beautify the paint effect.

Step 12: Screen printing/radium carving --1. According to the vector map provided by the customer to produce film, screen version; 2. Screen printing or radium carving according to the technological instructions made by customers; 3. Put the printed product in the oven to bake, and then cover the surface with UV.

Step 13: Finished product assembly -- both the appearance and the structure of the hand plate should be assembled. 1. Check whether the accessories to be assembled are complete. 2. Assemble carefully according to the 3D drawings and process instructions provided by the customer. Special attention should be paid to the assembly relationship of the product and the gap between the parts;

Step 14: Final inspection - all hand board before shipping to quality inspection, of course not to say that quality inspection is only in the last link, hand board quality is mainly controlled in each process, once the scrap can only be redone, this will seriously delay the product delivery, so do hand board to try to achieve 100% qualified, zero scrap. Ensure on-time delivery and deliver to customer satisfaction.