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Precision machining control method and machining die for single-layer closed wave spring

A wave spring and precision machining technology, applied in the field of parts processing, can solve problems such as difficult to meet the requirements of scientific research and production tasks of key models, unable to meet the service requirements of wave springs, large permanent deformation of wave springs, etc., to achieve stable dimensions, reliable mechanical properties, The full effect of organizational transformation

Pending Publication Date: 2022-04-15
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most companies producing wave springs refer to the requirements of JB / T 7590-2005 to produce wave springs, but the characteristics required by the JB / T7590-2005 standard have a large deviation from the measured characteristics, and even when working at the compression height specified in the standard, the wave The spring will have a large permanent deformation, poor stability, and poor fatigue resistance of the spring during use, which cannot meet the service requirements of wave springs on aero-engines, and it is difficult to meet the scientific research and production tasks of key models

Method used

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  • Precision machining control method and machining die for single-layer closed wave spring
  • Precision machining control method and machining die for single-layer closed wave spring
  • Precision machining control method and machining die for single-layer closed wave spring

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Experimental program
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Effect test

Embodiment

[0044] The precision machining control method for a single-layer closed wave spring provided in this embodiment includes the following steps:

[0045] 1) Making the blank, according to the design drawing of the part to be processed, the raw material is made into a ring-shaped blank with a die;

[0046] In this step, the punching die is a down-loading composite die, which is punched in the flattened state of the strip, and the dimensional accuracy of the workpiece is higher than that of commonly used flip-chip composite die punching, wire electric discharge cutting, laser cutting, etc. Blank method; raw materials are steel plates or steel strips of 65Mn type;

[0047] 2) cold stamping forming of ring-shaped blanks to obtain rough machined parts;

[0048] 2.1) Install the special stamping die on the crank press;

[0049] 2.2) Place the ring-shaped blank made in step 1) in the positioning ring of the forming die, position it with the shape of the ring-shaped blank, adjust the s...

Embodiment 2

[0074] see figure 1 , a stamping mold for realizing the precision machining control method of a single-layer closed wave spring, including an upper mold 16, a lower mold 17, and a positioning ring 18; the upper mold 16 and the lower mold 17 are arranged relative to each other from top to bottom; The outer edge and the two are in clearance fit; the positioning ring 18 can move up and down freely along the axial direction of the lower die 17; the positioning ring 18 is provided with a pick-up groove for placing the blank and taking out the workpiece; when the upper die 16 and the lower die 17 are in contact, Form the cavity mold. In order to keep the stability of the upper mold 16 and the lower mold 17, the stamping mold used in the present invention also includes a lower template 11, a lower mold fixed plate 12, an upper mold fixed plate 13, an upper template 14 and an anti-rotation pin 15, specifically connected The method is: the lower die 17 is fixed on the lower template 1...

Embodiment 3

[0077] see figure 2 , the correction mold provided in this embodiment includes a punch 21, a flat plate 22 and a base 24, the punch 21 is fixed on the press slider, and the flat plate 22 is connected with the base 24 by screws 23, and fixed on the press table. The luminosity of the working surfaces of the punch 21 and the flat plate 22 are all below Ra0.4 μm, so as to prevent defects caused by high friction between the flat plate 22 and the workpiece during calibration.

[0078] In this embodiment, a universal leveling mold is used to adjust the prefabricated height dimension of the waveform, effectively reducing the number of mold repairs of the pressing mold, and saving mold manufacturing costs.

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Abstract

The invention belongs to the technical field of part machining, and relates to a single-layer closed wave spring precision machining control method and a machining die, and the method comprises the following steps: 1) according to the design requirement of a part to be machined, a stamping die is used for manufacturing a raw material into an annular blank; (2) the annular blank in the step (1) is subjected to cold stamping forming, and a rough machining part is obtained; (3) the rough machining part obtained in the step (2) is corrected, so that the size of the rough machining part is consistent with the prefabricated height size of the part to be machined, and the parallelism between wave crests of the rough machining part is kept within 0.1 mm; (4) the corrected rough machining part is subjected to heat treatment, and a semi-finished machining part is obtained; and (5) the semi-finished machined part is subjected to strong pressing treatment, and machining is completed. The wave spring manufactured through the method is stable in size, reliable in mechanical property and good in fatigue resistance and deformation resistance, and the service requirement of the wave spring on an aero-engine can be completely met.

Description

technical field [0001] The invention belongs to the technical field of part processing, and relates to a spring processing control method, in particular to a single-layer closed wave spring precision processing control method and a processing mold. Background technique [0002] The wave spring is a key performance-related component in the fuel control system of an aero-engine. It is composed of a number of peaks and troughs according to certain rules. It is usually used in applications where the load and deformation are small, the spring stiffness is small, and axial preload is required. In some cases, the wave spring is mainly used in the transmission system of the aero-engine, its function is to support the graphite ring, and cooperate with the graphite ring to play the role of barrier seal between the fuel system and the lubrication system. [0003] At present, most companies producing wave springs refer to the requirements of JB / T 7590-2005 to produce wave springs, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F35/00B21D22/02B21D37/10C21D9/02C21D1/62C21D1/18
Inventor 李杨王运平李宝清马小昭曹立林侯晓鹏栾庆利
Owner XIAN AERO ENGINE CONTROLS
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