Quenching machine tool with mold quick change and thread limit device

Abstract

The invention relates to a quenching device, in particular to a quenching machine tool with a mold quick change and a jaw limit device. The quenching machine tool is based on the existing mold press quenching machine tool, and is added to limit the position of the jaw position of the workpiece during the quenching process. In the middle deformation of the teeth limit device, at the same time, the replacement of the upper mold is changed to a quick change device that is locked and opened by the connecting rod mechanism driven by the cylinder. On the one hand, this technical solution can effectively control the deformation of the tooth mouth and raceway of the workpiece during the quenching process, reduce the deformation of the tooth mouth and raceway in the workpiece, improve its coaxiality, effectively reduce the grinding amount of post-processing, and improve the processing efficiency of the product and qualified rate, on the other hand, it can increase the replacement time of the mold on the press quenching machine tool. This technical solution has the advantages of reasonable structure and good use effect, and is suitable for the transformation of the existing press quenching machine tool.

Description

Technical field [0001] The invention relates to a quenching device, in particular to a quenching machine tool with a mold quick change and a teeth limit device. Background technique [0002] 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. [0003] At present, for the heat treatment of large quan...

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Problems solved by technology

[0004] 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

[0005] 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] When replacing the mold, especially the upper mold of the current molding quenching press, since the upper mold is installed in the quenching oil cover, the replacement space is small, and the quenching oil cover needs to be removed for replacement, resulting in long replacement time and high labor intensity. , which directly affects the production efficiency of the enterprise and the physical and mental health of the operating workers

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