A kind of quenching heat treatment method of pin sleeve
A heat treatment method and pin sleeve technology, which are applied in heat treatment furnaces, heat treatment equipment, quenching devices, etc., can solve the problems of low heating efficiency, difficulty in reaching the hardness requirements for the depth of the hardened layer, and easy ignition.
Active Publication Date: 2022-03-22
苏州辽鞍机械有限公司
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Problems solved by technology
The disadvantages of the existing technology for processing the middle softening layer are as follows: single-turn inductor is used, the heating speed is slow, easy to spark, the inner ring is heated, and the heating efficiency is low. Only one pin sleeve can be heat-treated at a time, and the cycle time is 45s. The inner and outer peripheral hardened layers The depth is difficult to meet the hardness requirement and is not uniform
Method used
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specific Embodiment example 1
[0035] A quenching heat treatment method for a pin sleeve, the specific steps comprising:
[0036] S1: Place the pin sleeve to be quenched on the transmission track and transfer it to the peripheral quenching station;
[0037] S2: The pin sleeve is transferred to the coil heating station while rotating in the peripheral quenching machine tool, and the pin sleeve is heated in the heating coil, and the pin sleeve in the heating coil is in the state of heating, rotation and transmission at the same time;
[0038] S3: The heated pin sleeve is sent to the peripheral quenching station, and the heated pin sleeve is quenched by the one-way quenching water spray device;
[0039] S4: water-cooling the peripheral quenched pin sleeve;
[0040] L1: Place the pin bushes after outer peripheral quenching and cooling on the conveying track to the inner peripheral quenching station;
[0041] L2: The pin sleeve is sent to the heating coil through the rotating transmission device and the pushing ...
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A quenching heat treatment method for a pin sleeve, comprising: outer peripheral quenching heat treatment, inner peripheral quenching heat treatment, spraying water on the inner circumference of the pin sleeve after inner peripheral quenching heat treatment; wherein, the outer peripheral quenching treatment reaches the depth requirement of the hardened layer, forming an overall quenching heat treatment. Hard layer, inner peripheral quenching heat treatment, annealing and softening treatment of the middle layer through the heat-affected zone heated by the outer periphery, and the pin sleeves of the inner peripheral hardened layer, outer peripheral hardened layer, and middle softened layer are obtained, and the surface wear resistance of the pin sleeve is high. , Good toughness, greatly improved performance; high transmission speed, stable operation, uniform heating, and uniform hardened layer depth; two or more working lines work at the same time, and the quenching heat treatment efficiency of pin sleeves is greatly improved.
Description
technical field [0001] The invention relates to the technical field of heat treatment of parts (pin sleeves) used for installing crawler belt assemblies, in particular to a quenching heat treatment method for pin sleeves. Background technique [0002] The pin sleeve is one of the chassis parts of construction machinery, and it is a vulnerable part of the construction machinery used. Now it is commonly used in the direction of construction machinery such as excavators, bulldozers, crawler cranes, and pavers. The crawler track assembly is formed by screwing multiple track shoe monomers and chain rail assemblies through connecting bodies. The chain rail assembly is assembled by multiple chain links, and the adjacent chain links are connected by pin shafts and bushes. During the use of the track, the inside and outside of the pin bushes will be subject to friction and external pressure, so in order to ensure the use of the pin bushings Performance, the customer has requirement...
Claims
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IPC IPC(8): C21D1/667C21D1/10C21D9/00C21D1/32
CPCC21D1/667C21D1/10C21D9/0068C21D1/32C21D2221/10Y02P10/25
Inventor 关宏强刘小辉陈世平
Owner 苏州辽鞍机械有限公司