Induction quenching device used for cone sockets of brake platens and operation method

Abstract

Disclosed are an induction quenching device used for cone sockets of brake platens and an operation method. The induction quenching device comprises a quenching inductor, a revolution assembly, a cabinet body assembly and an electric control cabinet. The front end of the cabinet body assembly is fixedly connected with the quenching inductor, and the brake platens are placed at the upper end of the revolution assembly. In addition, the electric control cabinet is provided with a human-computer interface, a manual / automatic selecting knob and a heating button. A circular pipe is used for manufacturing the single-turn quenching inductor, so that the sharp corner effect is avoided during induction quenching of the cone sockets; the direction-adjustable and interval-adjustable lifting revolution tool assembly is arranged in the device, so that the problem that when induction quenching is conducted on the concave spherical surfaces of the cone sockets on arc surface wrapped with an effective induction coil, the induction interval is difficult to control is solved, the quenched layer is continuous and uniform in distribution, and accordingly the quenching quality is improved; the platens serves as the center for positioning, a height scale is used during induction quenching, and the position is precisely controlled through an index plate, so that the platens are rotationally positioned and heated in the induction quenching process, control over the quenching quality is guaranteed; and the operation method is simple, reliable and easy to carry out.

Description

technical field [0001] The invention belongs to the technical field of induction heat treatment, and relates to an induction hardening device and an operation method for brake pressure plate cone sockets, which are used for induction hardening of wheel tractor brake pressure plates. Background technique [0002] As we all know, braking performance is a very important safety index of tractors, and unqualified braking performance is a major quality problem of tractors. Common phenomena include braking distance exceeding tolerance and braking deviation, individual tractors cannot park on the slope, and slide out of control. If the braking performance fails to meet the requirements, the life safety of the driver and the third party may be endangered. [0003] In order to meet the needs of tractors for farming and transportation under different working conditions, high-power wheeled tractors generally use disc brakes, and the processing quality of the key component of disc brake...

AI Technical Summary

Problems solved by technology

[0010] The disadvantage of this method is that the flame heating time, heating distance, moving speed, etc. are manually operated by the operator's experience, and the heating temperature, heating speed, and precise heating position are difficult to control. The stability of quenching quality such as layer depth and quenching uniformity, improper operation may even cause partial melting of the surface of the cone socket, resulting in the scrapping of the brake pressure plate; in addition, after quenching, the parts warp and deform greatly, and subsequent modification of the socket shape and grinding are required; Low production efficiency, unable to form mass production

[0013] The disadvantage of this method is that although the quenching deformation of the parts is small, the depth of the hardened layer is shallow and uneven. The center line of the cone dimple reaches 1.2 mm, and the edge position is only 0.2 ~ 0.6 mm, which does not meet the technical requirements.

[0016] The disadvantage of this method is that the depth of the hardened layer does not meet the technical requirements, and the processing price is more than 7 times that of surface induction hardening. The cost is high, and it is not suitable for the surface treatment of the pressure plate cone dimple of the brake of the high-power wheeled tractor.

[0021] 1. Sharp corner effect is unavoidable

[0022] Depend on figure 1 , figure 2 It is known that due to the small size and irregular shape of the cone socket of the brake pressure plate, it is easy to produce a sharp corner effect when performing local induction hardening, that is, during local induction hardening, the current at the sharp corner is dense, and it is easy to cause overheating or overburning. , low heating efficiency, uneven distribution of hardened layer, and even quenching cracks

[0023] Sensing distance is difficult to control

[0024] Depend on figure 1 , figure 2 , image 3 and combine Figure 4 , Figure 5 It is known that the part to be induction hardened is a drop-shaped concave spherical surface, that is, the cone of the brake pressure plate. When heating, the effective induction coil arc of the quenching inductor is placed in the cone. The induction distance between the concave spherical surfaces is difficult to control. If the distance is too close, the bottom of the nest will be partially melted, and even the sensor will be burned out; if the distance is too far, the heating effect will be unsatisfactory. Hardened layer, and directly affects the quenching uniformity of the cone dimple, and then affects the control of quenching quality

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