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Process and grinding plate for processing low-noise precise steel ball

A low-noise, steel ball technology, applied in the field of bearing processing, can solve the problems of accelerated consumption of grinding plates, lack of grinding, geometric accuracy and surface quality limitations of processed balls, etc.

Inactive Publication Date: 2011-05-18
包德宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of the grinding plate is about 50% on average. In order to improve the utilization rate of the grinding plate, the Chinese changed the thickness of the grinding plate to 100mm. The effect is that the utilization rate of the grinding plate is increased from 50% to 60-65%, but the overall efficiency is counterproductive. , the use of 100mm thick grinding plate found that the quality of the new grinding plate can still meet the processing needs, but after 1 / 3 of the thickness of the grinding plate is consumed, the problem arises: first, the consumption of the grinding plate is obviously accelerated, wasting the grinding plate, and what is more serious is , during finishing, the surface quality is obviously reduced, and the steel balls with good surface quality cannot be ground after 1 / 3 of the plate thickness is used.
Plane a new board with a thickness of 100mm to measure the hardness difference between the surface layer and the core of the grinding board. The result is that the hardness difference between the surface layer and the core of the 100mm thick grinding board is Hb35-40. Such a large hardness difference requires the grinding board to be used at the center , the plate consumption will become faster and cause excessive loss of the grinding plate. What is more serious is that the steel balls with high surface quality cannot be ground. Because the surface quality of the grinding balls cannot be improved, the precision level of the processed products will be reduced. The economic loss caused is far greater than the material cost saved by improving the utilization rate of the board
Another problem in the use of the grinding plate is that the finishing grinding plate, the angle of the plate groove, the angle of the domestic finishing plate groove is generally 90°, and it is basically the same in foreign countries. The disadvantage of the plate groove at this angle is that the ball rotates in the plate groove If the middle rotation is too large, the consequence is that the geometric accuracy and surface quality of the processed balls are limited to a certain extent. It is very difficult to process G5, especially G3 balls.

Method used

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  • Process and grinding plate for processing low-noise precise steel ball
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Combining figure 1 , the present invention is a grinding plate for processing low-noise precision steel balls, which is composed of a fixed plate unit (15), a processed steel ball (8) and a rotating plate unit (16), and the fixed plate unit (15) is located at the Above the processed steel ball (8), the rotating plate unit (16) is located under the processed steel ball (8).

[0021] The present invention also has the following technical characteristics:

[0022] Described fixed plate unit (15) comprises machine tool fixed plate tire (1), fixed plate fastening screw (2), fixed plate auxiliary plate tire (3), fixed plate shaft (4), fastening screw (5), The fixed plate (6) and the hoisting screw (7), the fixed plate tire (1) of the machine tool is connected to the auxiliary plate tire (3) of the fixed plate through the fastening screw (2) of the fixed plate, and the fixed plate tire (1) of the machine tool is connected to the fixed plate shaft ( 4), the auxilia...

Embodiment 2

[0032] Example 2: Combining figure 1, the present invention is a process for processing low-noise precision steel balls and its grinding plate. During the steel ball processing process, the processed steel ball (8) is located between the fixed plate (6) and the rotating plate (10). The fixed plate shaft (4) exerts a certain pressure on the processed steel ball (8) to ensure that the processed steel ball (8) consumes a certain amount. The surface of the rotating plate (10) in contact with the steel ball to be processed has a triangular annular groove, and the processed steel ball (8) performs complex turnover and rotation motions in the triangular annular groove during processing to ensure high geometrical precision. Precision steel balls. The fixed plate (6) is a plane, and its channel is naturally ground into an arc-shaped annular channel during processing. During the processing as required, grinding agent should be continuously added to the processed steel ball (8) to ensu...

Embodiment 3

[0033] Example 3: Binding figure 2 , the present invention is a process for processing low-noise precision steel balls and its grinding plate, the angle of the grinding plate groove is changed from 90 degrees to 120 degrees. Such as figure 2 As shown, the α angle is 90 degrees and the β angle is 120 degrees. The characteristic analysis is as follows:

[0034] E-E1 is the rotation center of grinding plate, OA=O 1 A 1 = r (ball radius)

[0035] The contact point A in the 90-degree triangular groove and the outer contact point B, the linear velocity difference between the two points AB is V 1 ,

[0036] V 1 =2∏R 1 n-2∏R 2 n=2∏n(R 1 -R 2 )

[0037] Contact point A in the 120-degree triangular groove 1 , the outer contact point B 1 A 1 B 1 The difference in linear velocity between two points is V 2

[0038] V 2 =2∏R 1 n-2∏R 2 n=2∏n(R 1 -R 2 )

[0039] V 1 / V 2 =2∏n(R 1 -R 2 ) / 2∏n(R 3 -R 4 )

[0040] =(R 1 -R 2 ) / (R 3 -R 4 )

[0041] ∵R 1 -R 2...

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Abstract

The invention aims to provide a process and a grinding plate for processing a low-noise precise steel ball, which can improve the structure of the grinding plate, reduce the processing cost, change the groove angle of a ball-grinding plate groove, and improve the precision of a steel ball finished product. The grinding plate consists of a fixed plate unit, a processed steel ball and a rotating plate unit, wherein the fixed plate unit is positioned above the processed steel ball and the rotating plate unit is positioned below the processed steel ball. The process for processing the low-noise precise steel ball comprises the process flows of preparation before processing, groove pressing, a fine grinding process step using a vertical machine tool as an example and the like. In order to improve the evenness of the quality of the grinding plate, the thickness of the plate is changed into 70 millimeters from 100 millimeters to solve the problem of overlarge hardness difference of a plate surface layer and a core and improve the utilization rate of the grinding plate, and on the premise that the material of the grinding plate is unchanged, the structure and the using method of the grinding plate have designs so as to achieve the aim of improving the ball-grinding quality and the utilization rate of the grinding plate.

Description

(1) Technical field [0001] The invention relates to a bearing processing technology, specifically a technology for processing low-noise precision steel balls and a grinding plate thereof. (2) Background technology [0002] The rationality of the size of the grinding ball plate used in the bearing industry is far from that of foreign countries, and the thickness of the grinding ball plate abroad is basically 70mm. The utilization rate of the grinding plate is about 50% on average. In order to improve the utilization rate of the grinding plate, the Chinese changed the thickness of the grinding plate to 100mm. The effect is that the utilization rate of the grinding plate is increased from 50% to 60-65%, but the overall efficiency is counterproductive. , the use of 100mm thick grinding plate found that the quality of the new grinding plate can still meet the processing needs, but after 1 / 3 of the thickness of the grinding plate is consumed, the problem arises: first, the consump...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B11/06
Inventor 包德宏胡龙瑛包禹成包维兴
Owner 包德宏