Directional Lubricating Device and Lubricating Method for Flat Cake in the Embossing Process of Coins and Medals

Abstract

The invention discloses a device for directional lubricating a flat cake in the embossing process of coins and medals. , the upper baffle, and the left and right side baffles constitute the passage for conveying the flat cake, and the left and right side baffles are respectively provided with through holes, and the inlet ends of the through holes communicate with the lubricant supply mechanism, Its outlet end communicates with the conveying channel of the flat cake and the outlet position corresponds to the cylindrical surface of the flat cake. In the present invention, through holes communicated with the lubricant supply mechanism are arranged on the side baffles on both sides of the flat cake conveying channel, and at the same time, the outlet position of the through hole is set at the position corresponding to the cylindrical surface of the flat cake, so that the flat cake is conveyed During the process, its cylindrical surface can stick to the lubricant, and through its own rotation and mutual friction during the conveying process, the lubricant is dispersed, and it plays the role of lubricating the die ring in the subsequent embossing process.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming process lubrication, in particular to a coin and medal embossing process blank cake orientation lubrication device and a lubrication method. Background technique [0002] The embossing process of the production process of coins and medals belongs to the closed die forging process. Under the action of axial hedging between the front and back dies, the metal cake between them will flow radially, resulting in an interference fit between the coin cylinder and the inner wall of the die ring. state, in the process of continuous deformation and demoulding after deformation, the coin cylinder and the inner wall of the mold ring will have a large friction force, and without good lubrication, it will cause the coin cylinder to be rough, forming edge defects, and easy to Damage to the inner wall of the die ring leads to its scrapping. [0003] In the traditional process, proper lubricating gre...

AI Technical Summary

Problems solved by technology

Although this method has achieved the expected purpose in the lubricating effect, during the rotation and stirring of the grease and the flat cake in the feeder, since the density of the grease is relatively lighter than that of the flat cake, most of the time stays on the piled flat cake. A large amount of grease is applied to the front and back of the flat cake that does not need to be lubricated, while the amount of grease applied to the cylindrical surface of the flat cake that needs to be applied is relatively small

[0004] There are many problems in the traditional method of applying grease on the surface of the cake, as follows: 1. The surface quality of the product is affected, the front and back of the product are polluted, the brightness of the pattern decreases after embossing, and the place where the grease concentrates will pollute the surface of the product or even cause mold damage

2. Dirty products are likely to produce a large amount of non-metallic dust in the subsequent process to pollute the equipment, especially the optical lens, photoelectric switch and other optical devices of the testing equipment are greatly affected, which reduces the detection accuracy, easily leads to misjudgment, and is easy to be detected. Damage, increasing equipment cost and increasing quality risk

Images