Die press hardening machine with detection and tooth limit device

Abstract

The present invention relates to a quenching device, in particular to a mold press quenching machine tool with a detection and jaw limit device, the machine tool includes a main base, a workbench, a column, a lower mold installed on the workbench and a movable crossbeam The quenching oil cover and the upper mold installed in the quenching oil cover are characterized in that an annular inner cone and a limit block guide seat are arranged at the position of the workpiece teeth of the upper and lower molds, and a limit block is installed in the limit block guide seat ; A cylinder for detection, a workpiece detection head and a position detection switch are installed on the column, and the detection switch is connected with the electric control part of the die press quenching machine tool. This device can effectively control the deformation of the workpiece teeth and raceways during the quenching process, and can effectively reduce the occurrence of serious damage to the workpiece and even equipment caused by the failure of the workpiece and the upper mold to separate, and improve the deformation and protection of the teeth and raceways in the workpiece. Concentricity can effectively reduce the amount of grinding in post-processing and improve the processing efficiency and pass rate of products.

Description

[0001] Technical field [0002] The invention relates to a quenching device, in particular to a die-press quenching machine tool with a detection and tooth gap limiting device. Background technique [0003] For the sleeve parts that need quenching treatment in the mass processing process, quenching heat treatment is one of the key processes that determine product quality, performance and life. The quenching heat treatment process belongs to thermal processing, and there are many unpredictable factors, such as railway bearings In the manufacturing process of the inner and outer rings, qualified products processed before the process, in the quenching process, after high-temperature heating for a long time, and rapid cooling during quenching, changes in geometric size and shape will inevitably occur. When the deformation is too large , a large number of substandard products will be produced, and the rework rate and scrap rate are high. [0004] At present, for the heat treatment...

AI Technical Summary

Problems solved by technology

[0005] At present, all railway bearing molding quenching presses used online in China are mainly to control the deformation of the raceway of the jacket workpiece during the quenching process. The tooth mouth refers to the thinner ring part at both ends of the railway bearing jacket, and the deformation of the tooth mouth has never been uniform. A reasonable mechanism is used for effective control. During the quenching process, the workpiece starts to shrink and hold the mold tightly after rapid cooling. Because the thickness of the tooth mouth is thinner, it first shrinks in place, and the workpiece raceway and the middle part are thicker and unsealed, and will continue to shrink inward. During the contraction process of this part, it will cause different degrees of external expansion and deformation of the mouth mouth, resulting in uncontrollable deformation of the mouth mouth

[0006] Since the traditional processing procedure after quenching, that is, the grinding process is a separate process for the raceway and the tooth gap, it can make up for the shortcomings caused by the large deformation of the tooth gap, but due to the need for two clamping and processing, the processing efficiency is low

With the popularization of intelligent manufacturing and the improvement of automation in enterprises, various railway bearing manufacturers use intelligent grinding machines for one-time grinding of the raceway and the tooth gap for the jacket workpiece. If the deformation of the tooth gap is too large and the concentricity with the raceway If the height cannot be matched, it will bring a very big problem to the one-time grinding process, and the following problems will occur: 1. The grinding of the teeth or the raceway is not in place; 2. Due to the large deformation of the teeth, the grinding wheel enters the grinding process Excessive changes in the amount of knife will quickly reduce or damage the service life of the grinding wheel; 3. The grinding amount is uneven and the scrap rate increases, which seriously affects the production efficiency and economic benefits of the enterprise, and there are certain safety hazards

[0007] And in the actual use of the railway bearing molding quenching press, sometimes the jacket workpiece cannot be removed from the mold after quenching, that is, the workpiece and the mold are not completely separated.

According to the analysis of the mold structure of the equipment, there are three situations in which the mold cannot be removed: one is that the workpiece and the upper and lower molds are not separated, and the rise of the main oil cylinder is blocked at this time. Issue a displacement delay alarm; the second is the adhesion between the workpiece and the lower mold. In this case, the feeding and discharging manipulator will issue a grasping delay alarm when discharging, that is, if the manipulator does not rise after 3-5 seconds, it means that the workpiece and the lower mold The mold is not disengaged; the third is the adhesion between the workpiece and the upper mold. There is no preventive means and alarm function for this situation. Since the entire quenching process is carried out in a closed environment, this phenomenon is not easy to be discovered by the operator. If The workpiece adheres to the upper mold without being found. When the next cycle of red-hot workpiece is in place, the moving beam will still automatically lower, causing serious damage to the workpiece and even the equipment, directly affecting the production efficiency and economic benefits of the enterprise.

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