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Superfinishing method of bearing rollaway surface

A technology of bearing raceway and raceway surface, applied in the field of super-finishing of bearing raceway surface, can solve the problems of inability to realize bearing raceway surface machining, only processing metal surface, limitation of processing range, etc. Production cycle, improve contact fatigue performance, improve the effect of processing quality

Active Publication Date: 2012-04-25
SHIBIAI SPECIAL BEARING LUOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Publication No. CN101502881A discloses an ultrasonic metal surface processing device for CNC lathes. The device is provided with a tool holder capable of ultrasonic processing. When the tool holder is required for processing, it is set in a certain position by several transmission mechanisms. On the other hand, to achieve the docking of CNC lathes, due to the complex technical structure of the device and the limitation of the processing range, it can only process the metal surface, and cannot realize the processing of the bearing raceway surface

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  • Superfinishing method of bearing rollaway surface
  • Superfinishing method of bearing rollaway surface
  • Superfinishing method of bearing rollaway surface

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A superfinishing method for a bearing raceway, the steps are as follows:

[0044] Step 1. Machining the prefabricated bearing body to the required raceway surface with a lathe;

[0045] Step 2, heat-treating the bearing body forming the raceway at 820°C;

[0046] Step 3. Place the heat-treated bearing body on the numerical control device with the finishing device and the finishing device, set the linear speed of the workpiece to 80m / min, and the cutting amount of the finishing device and the vibrating tool head are 0.1mm / r;

[0047] Step 4: Turn on the CNC device, and the finish turning tool holder set at one end of the CNC lathe drives the turning tool to perform finish turning on the bearing raceway. When the bearing raceway surface is finished to 1 / 2, the finishing tool holder at the other end of the CNC lathe The vibrating tool head and the transducer on the upper surface are pressed against the bearing raceway surface after the finish car under the force of the p...

Embodiment 2

[0049] A superfinishing method for a bearing raceway, the steps are as follows:

[0050] Step 1. Machining the prefabricated bearing body to the required raceway surface;

[0051] Step 2, heat-treating the bearing body forming the raceway at 830°C;

[0052] Step 3. Place the heat-treated bearing body on the numerical control device with the finishing device and the finishing device, set the linear speed of the workpiece to 85m / min, and the cutting amount of the finishing device and the vibrating tool head are 0.12mm / r;

[0053] Step 4: Turn on the CNC device, and the finish turning tool holder set at one end of the CNC lathe drives the turning tool to perform finish turning on the bearing raceway. When the bearing raceway surface is finished to 1 / 2, the finishing tool holder at the other end of the CNC lathe The vibrating tool head and the transducer on the upper surface are pressed against the bearing raceway surface after finishing turning under the force of the pressing d...

Embodiment 3

[0055] A superfinishing method for a bearing raceway, the steps are as follows:

[0056] Step 1. Machining the prefabricated bearing body to the required raceway surface;

[0057] Step 2, heat-treating the bearing body forming the raceway at 840°C;

[0058] Step 3: Set the heat-treated bearing body on the numerical control device with the finishing device and the finishing device, set the linear speed of the workpiece to 90m / min, and the cutting amount of the finishing device and the vibrating tool head are 0.15mm / r;

[0059] Step 4: Turn on the CNC device, and the finish turning tool holder set at one end of the CNC lathe drives the turning tool to perform finish turning on the bearing raceway. When the bearing raceway surface is finished to 1 / 2, the finishing tool holder at the other end of the CNC lathe The vibrating tool head and the transducer on the upper surface are pressed against the bearing raceway surface after the finish car under the force of the pressing device...

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Abstract

The invention relates to a superfinishing method of a bearing rollaway surface, which is used for trimming the bearing rollaway surface by adopting a surface hammering process with a numerical control device. The method comprises the following steps of: firstly, lathing a needed rollaway surface and carrying out heat treatment under the condition of 820-880 DEG C; then, arranging a bearing body on the numerical control device with a finishing device and a sizing device; and firstly, finishing the bearing rollway and hammering the bearing rollaway surface at a high frequency with a vibration tool head of the sizing device at a high hammering frequency not smaller than 30KHz when the bearing rollway surface is finished to one half. The invention can simultaneously finish and size, improve the rollway roughness by more than 3 stages, reach an Ra value up to 0.1 micros, even below 1 micro and improve the processing efficiency by more than 50 percent than a traditional grounding and finishing process so that the metal structure of the rollway surface is compacter, improve the micro hardness on the rollway surface by more than 20 percent, the contact fatigue performance of the rollway and the bearing capability by more than 10 percent and prolong the service life of the bearing by more than 30 percent.

Description

technical field [0001] The invention relates to the processing technology of the bearing raceway, in particular to a superfinishing method of the bearing raceway surface. Background technique [0002] In the processing of bearings, especially for the processing of bearing raceways, the processing technology of the prior art is: turning processing-heat treatment-grinding-finishing processing (grinding machine grinding) four processes, because the precision of the bearing is mainly reflected in the rolling The surface roughness and shape accuracy of the raceway, especially the raceway, are important criteria for measuring the accuracy and quality of the bearing. In the processing and manufacturing process in the prior art, the surface roughness of the produced products, especially the raceways of medium and large bearings, is difficult to meet the "mirror surface" requirement, and it is far from meeting the use of special bearings. The reason is that in the process of grinding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P17/00B23P23/02
Inventor 王迪梅建洛
Owner SHIBIAI SPECIAL BEARING LUOYANG
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