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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, polluting environment, long processing time of bearing ring, high manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Centrifugally cast the refined bearing steel at a temperature of 1350°C and a rotational speed of 1400 rpm to form the initial shape of the blank. The casting time is 3 minutes, and the weight of the finished product is doubled. As a processing allowance, it will go out of the pit after heat preservation and cooling for 24 hours, and then cool naturally; after centrifugal casting, cut off the defects such as surface looseness and liquid precipitation, and then carry out free forging. The blanks are tested for flaw detection, and then the ring is rolled, and the temperature of the ring is 1105°C; then annealed, the annealing temperature is 500°C, and the secondary cutting is carried out after sampling and testing, and then quenched and tempered, the quenching temperature is 840°C , the tempering temperature is 165°C, and enter the assembly process after grinding and testing.

Embodiment 2

[0027] Centrifugally cast the refined bearing steel at a temperature of 1580°C and a rotational speed of 1400 rpm to form the initial shape of the blank. The casting time is 3 minutes, and 2 times the weight of the finished product is used as the processing allowance. , and then go out of the pit after 24 hours of heat preservation and cooling, and then naturally cool, the operations of cutting, free forging, flaw detection, ring rolling, annealing, sampling test, secondary cutting, quenching and tempering and grinding after centrifugal manufacturing are repeated in the embodiment One, the parameters are also the same.

Embodiment 3

[0029] Centrifugally cast the refined bearing steel at 1450°C, with a rotational speed of 1400 rpm for 3 minutes to form the initial shape of the blank, and use twice the weight of the finished product as the processing allowance, and then heat-preserve and cool for 24 hours. Out of the pit after 1 hour, then naturally cooled, the processes of cutting after centrifugal casting, free forging, flaw detection, ring rolling, annealing, sampling and testing, secondary cutting, quenching and tempering and grinding were repeated in Example 1, and the parameters were also the same . In this example, due to the moderate temperature of centrifugal casting, the quality of the produced bearing ring 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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