Production method of ultra-precise and long-life mold

Abstract

The invention relates to a production method of an ultra-precise and long-life mold. A mold core and a tool edge are sequentially subjected to rough machining and fine machining, a mold body is thus produced, the tool edge is treated through laser quenching, the mold with the tool edge is placed on a workbench, track memory programming is performed with a manipulator according to the shape of themold, and then, laser beams irradiate the tool edge for tool edge quenching treatment. Compared with the prior art, the method has the advantages that the tool precision is high, the tool edge machining cycle is short, the mold material cost is low, the mold machining tool consumption is low, the application range is wide and the like.

Description

technical field [0001] The invention relates to a manufacturing method of a sound-insulating felt punching die, in particular to a manufacturing method of an ultra-precision long-life die. Background technique [0002] At present, the felt punching die is mainly divided into two types of dies, one is a male and female punching die; The cutting of the product is achieved by applying pressure close to the product. The knife edge is designed as a male and female structure, and the gap between the male and female knife edges is 0mm. The knife edge and the collision surface require a 0 gap). From the working principle, it is not difficult to see that the knife edge of the punching die or the impact cutting die has relatively high requirements and is a key part of the mold. At the same time, the actual situation of punching use shows that the knife edge part is a vulnerable part. [0003] For this type of mold, in order to increase the life of the knife edge, the following two m...

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Problems solved by technology

[0004] 1. For the mold steel with good material for the cutting edge of the mold core (P20, 378, SKD11, SKD61, etc.), the method of installing inserts is adopted, and the hardness of the inserts is improved. Generally, the cutting edge is treated at about 55Hrc. The disadvantages of this method are: 1. The cost of mold materials is high; 2. It is difficult to process the mold edge (the hardness is 55Hrc); 3. The loss of the tool is large during the processing, and the cost of the tool is high; 4. The accuracy of the mold edge cannot be guaranteed when the insert is installed, and the mold fits after assembly Long cycle, poor punching effect

[0005] 2. Directly perform welding processing on the cutting edge of the mold. This process is currently the most widely used process. The method of this process is: the mold core is made of ordinary steel. After the mold core is rough processed, the part that needs to be hardened Open a groove with a width of 6-8mm and a depth of 3-5mm, and then weld P20, 378, SKD11, SKD61 and other materials in the groove, and then process it with a machine tool. A lot of cost needs to be saved, but there are also many problems in this process: 1. The cutting edge of the mold is difficult to process (the hardness is 60Hrc); 2. The tool loss is large during the processing, and the tool cost is large; 3. The processing tool is easy to wear, and the cutting edge of the mold The accuracy is not high, and the mold matching period after processing is long; 4. Because the mold knife edge is a welding process, the current mold knife edge welding is mostly manual welding, that is, the manual feeding of welding wire and the current instability of the welding machine, and the temperature of the welding environment There are many uncontrollable factors such as instability, so there are uneven stress and inconsistent hardness at the welding edge, which leads to the fact that in the production process, because it is produced on the overall press equipment of the mold, that is, under the same pressure, the The uneven stress and the inconsistency of the hardness of the knife edge must exist: some knife edges can withstand a certain pressure, and some knife edges cannot withstand the set pressure, which will inevitably lead to the occurrence of knife edge jumping, knife edge cracking, etc., which will reduce the life of the knife edge.

This patent is to heat the blade and then cut it, so that the semi-finished parts can be punched more neatly, but this patent still does not have the problem of improving the accuracy of the tool itself. In addition, the frequent heating-cooling process will also affect the tool. affect the service life of the mold, thereby shortening the service life of the mold

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