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High-elasticity oil seal spring and production technology thereof

A production process and high-elasticity technology, applied in the field of spring processing and manufacturing, can solve the problems that are not conducive to maintaining spring steel toughness, strong plasticity, large friction coefficient between lip and shaft, and ferrite large brittle tendency, etc. properties and tempering stability, improving mechanical properties, and improving the effect of quenching and tempering stability

Inactive Publication Date: 2016-09-28
ANHUI HONGQIAO METAL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the length of the spring is not suitable, the lip of the oil seal will be too tight, resulting in an excessive friction coefficient between the lip and the shaft, resulting in high temperature, which will accelerate the aging of the oil seal and shorten the service life of the oil seal.
[0003] In Chinese Patent Application Publication CN 104060181A, an oil seal spring and its production method are disclosed aiming at the problems of short service life, low strength and no corrosion resistance of the oil seal spring. By optimizing the ratio of raw materials and improving the production method, the product consistency is good , and has a long life, strength, strong corrosion resistance
[0004] The disadvantages of the existing technology are: in the heat treatment process of spring steel wire, the service temperature is 1930°C, and at this temperature, the ferrite will have a greater brittle tendency, which is not conducive to maintaining the excellent properties of spring steel toughness and strong plasticity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A highly elastic oil seal spring, the elements and their mass percentages in the raw materials are: C: 0.05%, Si: 0.74%, Mn: 1.44%, Cr: 17.22%, Ni: 10.00%, S: 0.018%, P: 0.022 %, the balance is Fe.

[0025] A highly elastic oil seal spring, the production process is: the steps are as follows:

[0026] (1) Production of spring steel wire according to the ratio of raw materials: use converter smelting, LF refining (refining outside the ladle furnace), during refining, add Cr in the raw material when the temperature reaches 1040 °C;

[0027] (2) Straightening and cutting: use pickling and phosphating to do surface treatment on the steel wire, and draw the wire at 125°C;

[0028] (3) Coil spring: Use a computer numerical control spring coiling machine to coil the steel wire into a spring shape;

[0029] (4) Heat treatment: oil quenching at 950°C during quenching and tempering, and tempering at 500°C. ;

[0030] (5) Use an automatic round forming machine to round the oil...

Embodiment 2

[0034] A highly elastic oil seal spring, the elements and their mass percentages in the raw materials are: C: 0.08%, Si: 0.92%, Mn: 1.83%, Cr: 17.52%, Ni: 10.86%, S: 0.018%, P: 0.022 %, the balance is Fe.

[0035] A highly elastic oil seal spring, the production process is: the steps are as follows:

[0036] (1) Production of spring steel wire according to the ratio of raw materials: use converter smelting, LF refining (refining outside the ladle furnace), during refining, add Cr in the raw material when the temperature reaches 1040 °C;

[0037] (2) Straightening and cutting: use pickling and phosphating to do surface treatment on the steel wire, and draw the wire at 125°C;

[0038] (3) Coil spring: Use a computer numerical control spring coiling machine to coil the steel wire into a spring shape;

[0039] (4) Heat treatment: oil quenching at 1000°C in quenching and tempering, tempering at 540°C. ;

[0040] (5) Use an automatic round forming machine to round the oil seal s...

Embodiment 3

[0044] A highly elastic oil seal spring, the elements and their mass percentages in the raw materials are: C: 0.06%, Si: 0.80%, Mn: 1.56%, Cr: 17.38%, Ni: 10.72%, S: 0.018%, P: 0.022 %, the balance is Fe.

[0045] A highly elastic oil seal spring, the production process is: the steps are as follows:

[0046] (1) Production of spring steel wire according to the ratio of raw materials: use converter smelting, LF refining (refining outside the ladle furnace), during refining, add Cr in the raw material when the temperature reaches 1040 °C;

[0047] (2) Straightening and cutting: use pickling and phosphating to do surface treatment on the steel wire, and draw the wire at 125°C;

[0048] (3) Coil spring: Use a computer numerical control spring coiling machine to coil the steel wire into a spring shape;

[0049] (4) Heat treatment: oil quenching at 1020°C during quenching and tempering, and tempering at 560°C. ;

[0050] (5) Use an automatic round forming machine to round the oi...

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Abstract

The invention provides a high-elasticity oil seal spring and a production technology of the spring, and relates to the field of spring machining and manufacturing. The spring comprises, by mass percent, 0.05% to 0.08% of C, 0.74% to 0.92% of Si, 1.44% to 1.83% of Mn, 17.22% to 17.52% of Cr, 10.00% to 10.86% of Ni, not larger than 0.030% of S, not larger than 0.035% of P and the balance Fe. The production technology comprises the steps of firstly, spring steel wire producing according to the raw material proportion, secondly, straightening and tailoring, thirdly, spring coiling, fourthly, heat treatment, fifthly, circle connecting, sixthly, paint spraying treatment and seventhly, drying and packaging. Through re-combination of all elements and the technology, the plasticity and toughness of the oil seal spring are effectively improved, and therefore the service life of the oil seal spring is prolonged.

Description

technical field [0001] The invention relates to the field of spring processing and manufacturing, in particular to a highly elastic oil seal spring and a production process thereof. Background technique [0002] The spring is a common part with a wide range of uses, and its characteristic is that it can immediately return to its original shape after the external force is removed. There is a ring-shaped spring on the rubber oil seal. This kind of spring uses a spiral inner core, and the two ends of the core column joint are fixedly connected into an O shape, so that the rubber sealing ring is stuck tighter and the seal is tighter. This kind of spring is commonly known as oil seal spring or O-shaped spring, also known as frameless self-tightening spring. Oil seal springs are usually used on shock absorber oil seals or rotary oil seals. When the oil seal is worn out after a period of use, the oil seal spring will compensate for the radial force. The performance of the oil sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/58C21D1/18C21D9/02B23P15/00
CPCC22C38/02B23P15/00C21D1/18C21D9/02C22C38/04C22C38/58
Inventor 余昌国魏筘松
Owner ANHUI HONGQIAO METAL MFG
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