阅读说明：本技术 一种3Cr13弹性元件的加工方法 (Processing method of 3Cr13 elastic element ) 是由 袁洪梅 张�雄 杨亚先 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种3Cr13弹性元件的加工方法。A、缠绕：将两根3Cr13扁钢带并紧卡入带型槽的缠绕心轴上进行缠绕,并将扁钢带由右旋翻转成左旋,得a品；B、精加工：将a品切成单件后,再采用冲切工装冲切槽口,得b品；C、热处理：将b品装夹在夹具上进行真空热处理,热处理的具体参数为:预热温度650±10℃,保温10±2min,升温至850±10℃,保温10±2min,继续升温至1010±10℃,保温20±2min,气冷,气冷压力4-6bar,回火温度220±10℃,保温1.5-2h,空冷,得3Cr13弹性元件。本发明具有尺寸稳定合格,加工简单,稳定性好,合格率高的有益效果。(The invention discloses a processing method of a 3Cr13 elastic element. A. Winding: tightly clamping two 3Cr13 flat steel strips into a winding mandrel with a groove for winding, and turning the flat steel strips from right to left to obtain a product a; B. finish machining: cutting the product a into single pieces, and then punching the notch by adopting a punching tool to obtain a product b; C. and (3) heat treatment: and clamping the product b on a clamp for vacuum heat treatment, wherein the specific parameters of the heat treatment are that the preheating temperature is 650 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is increased to 850 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is continuously increased to 1010 +/-10 ℃, the heat preservation is 20 +/-2 min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 +/-10 ℃, the heat preservation is carried out for 1.5-2h, and the air cooling is carried out, so that the 3Cr13 elastic element is obtained. The invention has the advantages of stable and qualified size, simple processing, good stability and high qualification rate.)

1. A processing method of a 3Cr13 elastic element is characterized in that: the method comprises the following steps:

A. winding: tightly clamping two 3Cr13 flat steel strips into a winding mandrel with a groove for winding, and turning the flat steel strips from right to left to obtain a product a;

B. finish machining: cutting the product a into single pieces, and then punching the notch by adopting a punching tool to obtain a product b;

C. and (3) heat treatment: and clamping the product b on a clamp for vacuum heat treatment, wherein the specific parameters of the heat treatment are that the preheating temperature is 650 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is increased to 850 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is continuously increased to 1010 +/-10 ℃, the heat preservation is 20 +/-2 min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 +/-10 ℃, the heat preservation is carried out for 1.5-2h, and the air cooling is carried out, so that the 3Cr13 elastic element is obtained.

2. The method for processing 3Cr13 elastic element according to claim 1, wherein: and in the step B, the punching tool comprises a notch female die and a notch die.

3. The method for processing 3Cr13 elastic element according to claim 2, wherein: in the step B, the 3Cr13 flat steel strip is fixed by a notch female die, and then a notch is punched by the notch die.

4. The method for processing 3Cr13 elastic element according to claim 2, wherein: in the step C, the specific parameters of the heat treatment are that the preheating temperature is 650 plus or minus 8 ℃, the heat preservation is 10 plus or minus 1.5min, the temperature is increased to 850 plus or minus 8 ℃, the heat preservation is 10 plus or minus 1.5min, the temperature is continuously increased to 1010 plus or minus 8 ℃, the heat preservation is 20 plus or minus 1.5min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 plus or minus 8 ℃, the heat preservation is carried out for 1.5-2h, and the air cooling is.

5. The method for processing 3Cr13 elastic element according to claim 4, wherein: in the step C, the specific parameters of the heat treatment are that the preheating temperature is 650 plus or minus 5 ℃, the heat preservation is 10 plus or minus 1min, the temperature is increased to 850 plus or minus 5 ℃, the heat preservation is 10 plus or minus 1min, the temperature is continuously increased to 1010 plus or minus 5 ℃, the heat preservation is 20 plus or minus 1min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 plus or minus 5 ℃, the heat preservation is carried out for 1.6-1.9h, and the air cooling is.

Technical Field

The invention relates to an elastic element, in particular to a processing method of a 3Cr13 elastic element.

Background

The elastic element produced by the company is shown in fig. 1-3, and is formed by winding 3Cr13 flat steel strip, and the notch size requires width: 0.50+0.3, length: 1.4 +/-0.3. the machining difficulty of the part is very high because the sizes of the two notches are relatively tight in tolerance and are elastic parts and difficult to realize mechanical machining, and meanwhile, the number of turns of the elastic elements is 1.7-1.74, and the relative angle of the notches is 50 +/-3 degrees, so that the machining difficulty of the part is very high. In the prior art, the notch is ground by a grinding wheel machine, so that the size and the relative angle of the notch are difficult to control, and the existing heat treatment process parameters cannot meet the production requirements of the 3Cr13 elastic element, so that the stability of the elastic element is poor, and the qualified rate is low.

Disclosure of Invention

The invention aims to provide a method for processing a 3Cr13 elastic element. The invention has the characteristics of stable and qualified size, simple processing, good stability and high qualification rate.

The technical scheme of the invention is as follows: a processing method of a 3Cr13 elastic element comprises the following steps:

A. winding: tightly clamping two 3Cr13 flat steel strips into a winding mandrel with a groove for winding, and turning the flat steel strips from right to left to obtain a product a;

B. finish machining: cutting the product a into single pieces, and then punching the notch by adopting a punching tool to obtain a product b;

C. and (3) heat treatment: and clamping the product b on a clamp for vacuum heat treatment, wherein the specific parameters of the heat treatment are that the preheating temperature is 650 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is increased to 850 +/-10 ℃, the heat preservation is 10 +/-2 min, the temperature is continuously increased to 1010 +/-10 ℃, the heat preservation is 20 +/-2 min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 +/-10 ℃, the heat preservation is carried out for 1.5-2h, and the air cooling is carried out, so that the 3Cr13 elastic element is obtained.

In the aforementioned method for processing the 3Cr13 elastic element, in the step B, the die cutting tool includes a notch die and a notch die.

In the aforementioned method for processing the 3Cr13 elastic element, in the step B, the 3Cr13 flat steel strip is fixed by using a notch die, and then the notch is punched by the notch die.

In the processing method of the 3Cr13 elastic element, in the step C, the specific parameters of the heat treatment are that the preheating temperature is 650 +/-8 ℃, the heat preservation is 10 +/-1.5 min, the temperature is increased to 850 +/-8 ℃, the heat preservation is 10 +/-1.5 min, the temperature is continuously increased to 1010 +/-8 ℃, the heat preservation is 20 +/-1.5 min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 +/-8 ℃, the heat preservation is carried out for 1.5-2h, and the air cooling is carried out.

In the processing method of the 3Cr13 elastic element, in the step C, the specific parameters of the heat treatment are that the preheating temperature is 650 +/-5 ℃, the heat preservation is 10 +/-1 min, the temperature is increased to 850 +/-5 ℃, the heat preservation is 10 +/-1 min, the temperature is continuously increased to 1010 +/-5 ℃, the heat preservation is 20 +/-1 min, the air cooling is carried out, the air cooling pressure is 4-6bar, the tempering temperature is 220 +/-5 ℃, the heat preservation is carried out for 1.6-1.9h, and the air cooling is carried out.

Compared with the prior art, the invention has the following beneficial effects:

1. the 3Cr13 flat steel strip is fixed by the notch female die, and the notch is punched by the notch die, so that the notch size and the relative angle are stable and qualified, and the processing is simple;

2. in the heat treatment, a product b is clamped on a clamp for vacuum heat treatment, and the specific parameters of the heat treatment are as follows: preheating at 650 +/-10 ℃, keeping the temperature for 10 +/-2 min, heating to 850 +/-10 ℃, keeping the temperature for 10 +/-2 min, continuously heating to 1010 +/-10 ℃, keeping the temperature for 20 +/-2 min, air cooling at the air cooling pressure of 4-6bar and the tempering temperature of 220 +/-10 ℃, keeping the temperature for 1.5-2h, and air cooling to obtain a 3Cr13 elastic element;

Drawings

FIG. 1 is a front view of a 3Cr13 elastic element according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIGS. 1A-A of the present invention;

FIG. 3 is a side view of a 3Cr13 elastic element according to the present invention;

FIG. 4 is a schematic view of the construction of the notch die of the present invention;

FIG. 5 is a schematic view of the construction of the notching die of the present invention.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.