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Technology for machining bushing with conical hole

A processing technology, tapered hole technology, applied in the field of bushing processing technology with tapered holes, to achieve the effect of convenient operation, meet technical requirements, and simple processing

Inactive Publication Date: 2019-12-31
JIANGXI HONGDU AVIATION IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now there is such a type of bushing. Although the structure of the bushing is not complicated on the surface, it has higher technical requirements and more precise dimensional requirements. In addition to the tapered hole, it must also ensure that the tapered hole is in line with the outer circle. The circular runout of Φ0.03 requires positioning and clamping for turning, and the technical requirements are very strict

Method used

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  • Technology for machining bushing with conical hole
  • Technology for machining bushing with conical hole
  • Technology for machining bushing with conical hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Such as Figure 1 to Figure 3 Shown: A processing plan for bushings with tapered holes, including:

[0029] S1: Receive 30CrMnSiA-Jφ25×25 (precision forging bar with a diameter of 25mm and a single piece of blanking length of 25mm), fill in the material number, furnace batch number and other parts information in the corresponding column, and have been filed;

[0030] S2: 30CrMnSiA requires 100% spectroscopic inspection, material: 30CrMnSiA;

[0031] S3: The three-jaw chuck clamps the bar, use the turning tool to turn the right side of the bar into a flat surface, and roughen the large-diameter outer circle, small-diameter outer circle and inner hole. The large-diameter outer circle Φ1=24mm, small Diameter outer circle Φ2=16mm and inner hole Φ3=9mm, ensure that the length of the small diameter cylindrical surface is L1=14mm, and the overall length of the part is L2=18mm. At this time, there is a certain amount of fine turning allowance after heat treatment;

[0032] S4: 30CrMnS...

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Abstract

The invention discloses a technology for machining a bushing with a conical hole. The technology for machining the bushing with the conical hole comprises the following steps that firstly, a bar material corresponding to the material designation is received; secondly, 100% light splitting inspection is conducted as required; thirdly, end faces are planed smooth by using a turning tool, rough turning is conducted on a large-diameter outer circle, a small-diameter outer circle and an inner hole; fourthly, heat treatment is conducted as required, and the strength of heat treatment is requested to reach the formula that sigma b is equal to 1175 + / - 100 MPa; fifthly, the small-diameter outer circle end is clamped, end surfaces are planed smooth, and finish turning is conducted on the conical hole; sixthly, the turning tool is turned round, locating is conducted according to the conical hole, and finish turning is conducted on the big-diameter outer circle and the small-diameter outer circle; seventhly, heat treatment is conducted as required, and low temperature tempering is conducted; and eighthly, a bushing is delivered for inspection. According to the technology for machining the bushing with the conical hole, finish turning is conducted on the conical hole firstly, then finish turning is conducted on the outer circles, circular run-out can be effectively guaranteed, technological requirements are met, and the part quality is also guaranteed; and the technological scheme conforms to reality, the operation is convenient, the technology is popular and easy to understand, and the machining method is easy to learn and popularize.

Description

Technical field [0001] The invention relates to the technical field of precision manufacturing and processing of aviation machinery, in particular to a processing technology of a bushing containing a tapered hole. Background technique [0002] Bushings are common turning parts, belonging to shaft parts. 95% of the work in turning is shaft parts processing. For bushing parts with conventional round holes and shaft shoulders, conventional turning can be used to complete. And now there is such a type of bushing. Although the structure of the bushing is not complicated on the surface, the technical requirements are higher and the size requirements are more precise. In addition to the tapered hole, the tapered hole and the outer circle must be ensured. The circular runout of Φ0.03 requires positioning and clamping for turning, and the technical requirements are very strict. At this time, it is necessary to fully consider the processing plan of this type of bushing and give a reasona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B1/00B23P15/00
CPCB23B1/00B23P15/00
Inventor 石鑫万昌利胡林华王忠建
Owner JIANGXI HONGDU AVIATION IND GRP
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