There are many kinds of molds, which can be divided into: 1 processing metal mold according to the processing target and processing technology. 2 Processing non-metal and powder metallurgy molds. Today's Xiaobian is about the methods and processes of stamping die design.
I. Analysis of stamping process of stamping parts
Stamping parts need to have excellent stamping process to produce qualified stamping parts in the most simple and economical way. The technical analysis of the stampings can be completed as follows:
1. Read the parts map. In addition to the part shape scale, the key points are to understand the requirements of part accuracy and appearance roughness.
2. Analyze whether the structure and shape of the part are suitable for stamping.
3. Analyze whether the benchmark selection and scale marking of the parts are reasonable, and whether the accuracy of the scale, orientation and shape is suitable for stamping.
4. Whether the roughness requirement of the cross section of the blank is too high.
5. Is there a large enough production volume?
If the craftability of the parts is too poor, you should negotiate with the planners and propose a plan to amend the plan. If the production batch is too small, other production methods should be considered for processing.
2. Stamping process planning and optimal process design
1. According to the shape and dimension of the stamping parts, the properties of the stamping process, such as punching, meandering, drawing, bulging, reaming and other stamping die planning methods and process stamping die planning methods and processes, are beginning to be determined.
2. Calculate the degree of deformation of each stamping forming method. If the degree of deformation exceeds the limit deformation degree, the number of times of punching in the process should be accounted for.
3. According to the deformation characteristics and quality requirements of each process, organize a reasonable stamping sequence. Care should be taken to ensure that the deformation zone of each process is a weak zone. The formed part (including the hole or shape that has been punched out) shall not participate in the deformation in the subsequent process. The polygonal meandering must be bent first and then bent. Within, it is necessary to organize the necessary auxiliary processes and processes such as shaping, leveling, and heat treatment.
4. Under the premise of ensuring the accuracy of the parts, according to the production batch and the blank positioning and discharge requirements, a reasonable process combination method is determined.
5. Plan more than two process plans and compare the quality, cost, yield, mold sharpening and repair, mold life and operational safety to select an optimal process plan.
6. Start to determine the stamping equipment for each process.
3. Stamp blank planning and layout design
1. Calculate the blank scale according to the nature of the stampings, and make a blank map
2. According to the nature of the blank, plan the layout map and conduct data utilization accounting. Plan a variety of placement plans and compare the best plans among them.
4. Stamping die design
1. Determine the mold structure method for each step of the stamping process, and make a mold sketch.
2. Perform specific structural planning for the specified 1-2 process molds and make mold operation drawings. The planning method is as follows:
(1) Determine the type of mold: it is a simple mold, and the continuous mold is still a composite mold.
(2) Mold operation part planning: Calculate the scale of the convex and concave die and the length of the convex and concave die, and determine the convex and concave die structure method and the connection fixing method.
(3) Determine the positioning and spacing method of the blank, and plan the corresponding positioning and distance parts.
(4) Determine the method of pressing, unloading, topping and pushing parts, and plan the corresponding pressing plate, unloading plate and pusher block.
(5) Formwork planning: including the planning of the upper and lower mold bases and guiding methods, and the specification of the formwork.
(6) On the basis of the above operations, the mold operation drawing is produced proportionally. First, the blank is made by double-dotted line, then the working parts are made, then the positioning and distance-distance parts are made, and the above parts are joined by the connecting parts, and finally the pressing and unloading parts are made in the proper orientation. Depending on the specific conditions of the mold, the above order can also be adjusted appropriately.
(7) The outline of the mold should be marked on the operation drawing, the mold closing height, the cooperation scale and the cooperative type stamping die planning method and process mold planning. The operation drawing should indicate the manufacturing precision and skill requirements of the mold. The operation drawing should be made according to the national drawing specifications, and there are standardized title bars and name tables. If it is a blanking die, make a layout drawing on the upper left corner of the drawing.
(8) Calculate the mold pressure center and check whether the pressure center and the mold center line coincide. If it is not coincident, correct the mold results accordingly.
(9) Calculate the punching pressure, and finally select the stamping equipment to check the relevant dimensions of the mold and stamping equipment (closed height, work surface, mold handle size, etc.).
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