Bearing sleeve processing shaping technology

A technology for processing and forming bearing rings, applied in the field of bearing rings, can solve the problems of long processing time, high manufacturing cost and environmental pollution of bearing rings, and achieve the effect of shortening production cycle, reducing production cost and ensuring quality

Inactive Publication Date: 2003-04-30
周发金
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the current production process are complex process, pollu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] Centrifugally cast the refined bearing steel at a temperature of 1350°C and a rotational speed of 1400 rpm to cast the initial shape of the blank. The casting time is 3 minutes, and the weight is twice the weight of the finished product. As the processing allowance, the pits are removed after 24 hours of heat preservation and cooling, and then naturally cooled; after centrifugal casting, the defects such as surface looseness and liquification are cut off, and then free forging is carried out, and the temperature of free forging is 1000 ℃; The blanks are subjected to flaw detection, and then rolling, the rolling temperature is 1105 ℃; then annealing, the annealing temperature is 500 ℃, after sampling and testing, secondary cutting is carried out, and then quenching and tempering are carried out, and the quenching temperature is 840 ℃ , the tempering temperature is 165 ℃, and it enters the assembly process after grinding and testing qualified.

Example Embodiment

[0026] Embodiment 2

[0027] The refined bearing steel is centrifugally cast at a temperature of 1580°C and a rotational speed of 1400 rpm, and cast into the initial shape of the blank. The casting time is 3 minutes, and 2 times the weight of the finished part is used as the processing allowance. , after 24 hours of heat preservation and cooling, the pit is released, and then naturally cooled, and the processes such as cutting, free forging, flaw detection, ring rolling, annealing, sampling and testing, secondary cutting, quenching and tempering, and grinding after centrifugal manufacturing are repeated. Example One, the parameters are also the same.

Example Embodiment

[0028] Embodiment 3

[0029] The refined bearing steel is centrifugally cast at 1450 ° C, the speed is 1400 rpm, and the time is 3 minutes, and the initial shape of the blank is cast. After 1 hour, the pits are out of the pit, and then naturally cooled. After centrifugal casting, the processes of cutting, free forging, flaw detection, rolling, annealing, sampling and testing, secondary cutting, quenching and tempering, and grinding are repeated in Example 1, and the parameters are also the same. . In this case, due to the moderate centrifugal casting temperature, the quality of the bearing ring produced is good.

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PUM

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Abstract

The invented bearing sleeve processing and shaping technology is characterized by that the said technology includes: steel smelting; centrifugal casting, cutting, free froging, fault detecting, milling into ring, annealing, sample chemical examination, cutting, quenching tempering, and grinding. After centrifugal casting, take 1-2.5 time weight of the product as allowance for processing. The temperature of centrifugal casting is 1350-1580 deg.C, rotation speed is 1300 rpm-1400 rpm, time is 3-4 min., thermal insulation and cooling for 22-26 hr. taking out from pit, and then natural cooling. Advantages: short production period, reduced production cost, and guaranteed quality of product.

Description

(1) Technical field [0001] The invention relates to a bearing ring, in particular to a production process of a civilian bearing ring. (2) Technical background [0002] The process flow for producing bearing rings in the prior art is generally: steelmaking→ingot casting→filling the parison for 6-7 hours (surface temperature 1270°C, ingot temperature 1180°C)→slow cooling for 60 hours and then out of the pit for pickling repair Grinding; → heating (temperature 1120°C-1160°C) rolling → slow cooling for 24 hours, straightening out of the pit, pickling and grinding → cutting into material sections → forging (upsetting → punching → reaming → ring rolling) → annealing →Cutting→Quenching→Tempering→Grinding; After passing all inspections, enter the assembly room. The disadvantages of the current production process are complex process, polluting the environment, long processing time of the bearing ring, and high manufacturing cost. (3) Contents of the invention [0003] The technic...

Claims

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Application Information

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IPC IPC(8): F16C33/64
Inventor 周发金
Owner 周发金
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