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Synchronous tooth holder heat treatment method

A heat treatment method and technology for synchronizing tooth bases, applied in the field of heat treatment, can solve problems such as waste, normal variation exceeding tolerance, etc., and achieve obvious effects, improve production efficiency, and reduce costs.

Inactive Publication Date: 2019-04-09
QIJIANG GEAR TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the analysis of the function and accuracy of the synchronous tooth seat: 1. The external teeth of the synchronous tooth seat are 9-level precision; 2. The external teeth are engaged teeth rather than running teeth; usually, the combined teeth of this type of precision level should not require grinding. However, judging from the reaction in the above table, due to the deformation caused by heat treatment, the normal line variation is seriously out of tolerance. From the perspective of lean production, this is a redundant process and a waste

Method used

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  • Synchronous tooth holder heat treatment method

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Experimental program
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Effect test

Embodiment 1

[0023] Such as Figure 1 to Figure 3 As shown, the heat treatment method of the synchronous tooth seat includes the following steps:

[0024] Step 1: Assemble the synchronous gear seat 1 and the synchronous sliding sleeve 2 and put them into the carburizing furnace, raise the temperature in the carburizing furnace to 850°C, set the carbon potential to 0.93%, and the carburizing time to 3.3 hours, so that Carbon atoms penetrate into the surface austenite of the synchronous tooth seat and synchronous sliding sleeve;

[0025] Step 2. After the carburizing time in step 1 is over, keep the temperature in the carburizing furnace at 850°C, adjust the carbon potential to 0.76%, and make the carbon atoms on the upper surface of the synchronous tooth seat and synchronous sliding sleeve diffuse into their respective interiors , the diffusion time is 1.6 hours;

[0026] Step 3, after the diffusion time of step 2 is over, lower the temperature of the carburizing furnace to 810°C and keep...

Embodiment 2

[0029] Assemble the synchronous gear seat 1 and the synchronous sliding sleeve 2 and put them into the carburizing furnace. Raise the temperature in the carburizing furnace to 855°C, set the carbon potential to 0.94%, and the carburizing time to 3.2 hours to allow carbon atoms to penetrate into the carburizing furnace. into the surface austenite of the synchronous tooth seat and synchronous sliding sleeve;

[0030] Step 2, after the carburizing time in step 1 is over, keep the temperature in the carburizing furnace at 855°C, adjust the carbon potential to 0.745%, and make the carbon atoms on the upper surface of the synchronous tooth seat and the synchronous sliding sleeve diffuse into their respective interiors , the diffusion time is 1.4 to 1.6 hours;

[0031] Step 3, after the diffusion time of step 2 is over, lower the temperature of the carburizing furnace to 805°C and keep it warm for 1.1 hours;

[0032] Step 4. After the holding time of step 3 is over, put the synchron...

Embodiment 3

[0034] Assemble the synchronous gear seat 1 and the synchronous sliding sleeve 2 and put them into the carburizing furnace, raise the temperature in the carburizing furnace to 860°C, set the carbon potential to 0.95%, and the carburizing time is 3 hours to allow carbon atoms to infiltrate into the surface austenite of the synchronous tooth seat and synchronous sliding sleeve;

[0035] Step 2. After the carburizing time in step 1 is over, keep the temperature in the carburizing furnace at 860°C and adjust the carbon potential to 0.75%, so that the carbon atoms on the upper surface of the synchronous gear holder and the synchronous sliding sleeve are diffused into their respective interiors , the diffusion time is 1.5 hours;

[0036] Step 3, after the diffusion time of step 2 is over, lower the temperature of the carburizing furnace to 800°C and keep it warm for 1 hour;

[0037] Step 4. After the holding time of step 3 is over, put the synchronous gear seat and synchronous slid...

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Abstract

The invention discloses a synchronous tooth holder heat treatment method. The synchronous tooth holder heat treatment method comprises the following steps that 1, a synchronous tooth holder and a synchronous sliding sleeve are put into a carburizing furnace after being assembled, the temperature of the interior of the carburizing furnace is increased to 850-870 DEG C, carbon potential is set to 0.93-0.97%, carburizing lasts for 2.8-3.3 h, and carbon atoms are made to permeate into austenite on the surface layer of the synchronous tooth holder and austenite on the surface layer of the synchronous sliding sleeve; 2, after carburizing in the step 1 is completed, the temperature of the interior of the carburizing furnace is kept at 850-870 DEG C, the carbon potential is adjusted to 0.74-0.76%,and the carbon atoms in the upper surface layer of the synchronous tooth holder and the upper surface layer of the synchronous sliding sleeve are diffused into the synchronous tooth holder and the synchronous sliding sleeve, and diffusing lasts for 1.4-1.6 h; 3, after diffusing in the step 2 is completed, the temperature of the carburizing furnace is decreased to 790-810 DEG C, and heat preservation is conducted for 0.9-1.2 h; and 4, after heat preservation in the step 3 is completed, the synchronous tooth holder and the synchronous sliding sleeve are assembled and put into 95-110 DEG C oil to be quenched, and the oil is stirred by adopting a stirrer in the quenching process. The synchronous tooth holder heat treatment method has the advantage that the precision of the synchronous tooth holder is improved.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment method for a synchronous tooth seat. Background technique [0002] The outer teeth of the synchronous gear seat and the inner teeth of the opposite gear not only produce slippage but also bear large impact loads during the shifting process. As one of the important parts that determine whether the synchronizer shifts easily, its performance directly affects the synchronization engine life and shift flexibility. [0003] Depend on figure 1 It can be seen that there are teeth on the inner and outer peripheral surfaces of the synchronous tooth seat, and two sets of three-segment grooves are processed in the circumferential direction for the positioning of the synchronous push block assembly and the synchronous sliding sleeve. There are holes in the bottom processing. It can be seen that the structure of the synchronous tooth seat is relatively complicated, a...

Claims

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Application Information

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IPC IPC(8): C23C8/00C21D1/18C21D9/32
CPCC21D1/18C21D9/32C23C8/00
Inventor 陈继红
Owner QIJIANG GEAR TRANSMISSION