Mold design and manufacturing aims to cultivate the basic professional knowledge of mold design and manufacturing, with strong practical work ability, able to engage in mold design, process design, mold manufacturing, mold maintenance, quality management and other work in the first line of production, adapt to the production, management and service needs of the first line of the mechanical mold industry, and have good professional ethics and innovation spirit Skilled professionals.
Mold processing direction: ① mold processing and production organization; ② mold NC programming processing; ③ mold 3D design; ④ product development 3D design. Other technical direction: production management, logistics management, equipment management, quality management, project management and product development, automobile industry, mechanical manufacturing technologist, CNC Engineer, etc.
Manufacturing preparation
Feasible analysis
For the feasibility analysis of the products of the designed mold, take the computer case as an example, first use the design software to carry out the assembly analysis of the product drawings of each component, that is, the set drawings mentioned in our work, to ensure the correctness of the product drawings before the mold design, on the other hand, we can be familiar with the importance of each component in the whole case to determine the key dimensions, so as to design the mold It's very beneficial. I won't give a detailed introduction to the specific method of overlay here.
structure
After product analysis, the work to be done is to analyze what kind of mold structure is used for the product, arrange the process of the product, determine the stamping content of each process, and use the design software to carry out product development. When product development is generally carried out from the follow-up project, for example, five processes are needed for a product, and when the stamping is completed, the product drawing is used to start To four projects, three projects, two projects and one project, and to start a drawing, and then copy a copy of the previous project, that is, to complete the product development of five projects, and then carry out detailed work. Note that this step is very important, and at the same time, it needs to be particularly careful. If this step is completed well, it will save a lot of time in drawing the mold drawing, and for each project After the stamping content is determined, including in the forming die, the inner and outer lines of the product material thickness are reserved to determine the dimensions of the convex and concave die. The product development method will not be described here, but will be specifically introduced in the product development method.
Spare parts
Prepare materials according to the product development drawing, determine the template size in the drawing, including each fixed plate, discharge plate, convex and concave die, insert, etc., pay attention to prepare materials directly in the product development drawing, which is very beneficial for drawing the mold drawing. I have seen many mold designers directly prepare materials by manual calculation on the product development drawing, which is too inefficient and directly in the drawing The specification and size of the template are drawn on the paper and expressed in the form of assembly drawing. On the one hand, material preparation can be completed, on the other hand, a lot of work will be saved in the work of mold accessories, because in the work of drawing components, only positioning, pin, guide post and screw hole need to be added in the material preparation drawing.
Draw
After the material preparation is completed, it can be fully entered into the drawing of the mold drawing. In the material preparation drawing, a copy can be made to draw the components, such as adding screw holes, guide pillar holes, positioning holes and other hole positions. In the punching die, various holes need to be cut by wire. In the forming die, the forming gap between the upper and lower dies must not be forgotten. Therefore, the mold of the product after the completion of these works Almost 80% of the drawings have been completed. In addition, in the process of drawing the mold drawing, attention should be paid to: each process, including making, such as bench marking, wire cutting and other different processing processes, has a complete production of layers, which is of great benefit to wire cutting and drawing management, such as color differentiation, dimension marking is also a very important work, but also the most troublesome work Because it's a waste of time.
Proofreading
After the completion of the above drawings, in fact, the drawings can not be issued. In addition, it is necessary to proofread the mold drawings, assemble all accessories, make different layers for each different mold plate, and analyze the mold assembly with the same benchmark, such as the guide post hole, etc., and integrate the product development drawings of each process into the assembly drawing, so as to ensure that the hole positions of each template are consistent and the upper and lower die positions of the bending positions Whether the clearance fit is correct.
Related processes
Glue position check
Check whether the glue position is even, if not, it will cause shrinkage and affect the appearance.
Direction of die opening
Determining parting surface and draft angle
1. Select the maximum projection value of parting surface in the opening direction, and simplify it as much as possible
2. Penetration position: select the rear mold as much as possible. If the front mold is to be touched, it is easy to walk around the front edge and affect the appearance. Use plane contact.
3. Pillow position: Pillow 5-8 mm, then connect with the large parting surface, pull out the rubber part 3 degrees, pull out the back 3 degrees or avoid the air.
4. Inserting position: use the side to work, pull out 3 degrees, and generally make inserts.
Draft principle
1: Draft in reducing direction.
2: The maximum end of shaft type is the product size, and the minimum end of hole type is the product size.
2D mirror image
2D must be mirrored and shrunk. If you forget this step, most of the molds will be scrapped.
Shrinkage calculation
Small shrinkage products (less than 5 ‰) can be shrunk according to experience. Large shrinkage products, such as a product that can be shrunk by 18 ‰ or 20 ‰ or even 22 ‰, must first ask for the opinions of the person in charge before releasing, so as not to match the size of supporting products.
Coaxial computing
The eccentricity Ko of the pump nozzle shall be coaxial
