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A method of manufacturing a slewing bearing

A technology of slewing bearing and manufacturing method, applied in the direction of manufacturing tools, other manufacturing equipment/tools, etc., can solve the problems of short service life of slewing bearing, low processing and production efficiency, poor quality stability, etc., to achieve small machining allowance, saving Raw materials, stable quality effect

Inactive Publication Date: 2017-05-24
MAANSHAN HUADONG SLEWING BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of short service life, poor quality stability and low processing and production efficiency of existing slewing bearings, the present invention provides a manufacturing method of slewing bearings, which can effectively improve production efficiency and produce stable quality, high precision and long service life. long slewing ring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method of manufacturing a slewing bearing, comprising the following steps:

[0045] 1) material selection, the selection material is the raw material of 50Mn steel;

[0046] 2) forging, forging the raw material in step 1) into a ring gear blank;

[0047] 3) Rough machining, rough machining the ring gear blank obtained by forging in step 2), first fix the ring gear blank on the machine tool workbench with a clamp, use a lathe to carry out the surface treatment of the ring gear blank, remove the surface rust layer, and leave the remaining Amount of 2 ~ 3mm;

[0048] 4) Draw a line, draw the center line of the raceway along the inner wall of the ring gear after rough machining in step 2), and at the same time preset 2 plug hole position points at the corresponding positions between the outer wall of the ring gear and the center line;

[0049] 5) boring, using a boring machine to process the plug hole at the plug hole position in step 4), the raceway diameter d=25.4mm, ...

Embodiment 2

[0065] Same as Example 1, the difference is: step 5) in the raceway diameter size d=50.8mm, then the diameter of the plug hole is D=d+9.2mm=60mm; step 8) in quenching and tempering, to the embodiment The raceway processed in step 6) of 1 is subjected to quenching and tempering treatment. Firstly, the ring gear after semi-finishing in step 6) is fixed by multi-point support, and then the surface of the raceway is heated to 700°C, and then the nozzle is aligned Quench the inner surface of the raceway and rotate relative to the ring gear to spray quenching liquid, cool the surface of the raceway to 150°C and then temper. , rotate around the axis of the corrected cylindrical surface in step 7), which can ensure uniform quenching and improve accuracy; stop spraying immediately when rotating 360°-n=352.72°, and mark the nozzle stop position on the raceway surface, where n=180l / πR= (180×2×50.8)÷(3.14×800)≈7.28°, R is the radius of the ring gear 800mm, l=2d, d is the nominal diameter ...

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Abstract

The invention discloses a manufacturing method of a slewing bearing, belongs to the field of production of slewing bearings, and solves the problems of short service life, weaker quality stability and low machining production efficiency of the traditional slewing bearings. The manufacturing method of the slewing bearing comprises a rough machining step, a lineation step, a hole boring step, a semi-finish turning step, a tempering step, a finish machining step, a roller way finish machining step and an assembly step, wherein the tempering step of the inner surface of a roller way is to use a nozzle for aligning to the inner surface of the roller way to spray quenching liquid and immediately stop spraying when rotating by 360-n degrees, and the roller way finish machining step is to grind the inner surface of the roller way by adopting turning to replace grinding. The manufacturing method of the slewing bearing can effectively improve the production efficiency, and manufactures the slewing bearings with stable quality, high precision and long service life.

Description

technical field [0001] The invention belongs to the field of production of slewing bearings, and in particular relates to a manufacturing method of slewing bearings. Background technique [0002] As an important moving component, the slewing bearing is located in the key part of the structure. The slewing bearing is widely used in the actual industry and is called "the joint of the machine". The main structural types currently used in actual production are single row four Point contact ball type, double row ball type, multi-row roller type, etc. It is widely used in automobile cranes, port cranes, railway cranes, marine cranes, container cranes, metallurgical cranes, excavators, filling machines, navigation instruments, and high-end, precision, and cutting-edge fields such as CT machine standing wave therapy equipment, radar antenna base , missile launchers, tanks, robots, and revolving restaurants. The force situation of the slewing bearing is complicated, which puts forw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04
CPCB23P23/04
Inventor 虞洪流虞洪波周仁林何平
Owner MAANSHAN HUADONG SLEWING BEARING
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