CN114850358A - Preparation method of C-shaped disc spring - Google Patents

Abstract

The invention relates to a spring preparation method, in particular to a preparation method of a C-shaped disc spring, which is used for solving the defects of more material consumption and higher cost in the existing preparation method of the C-shaped disc spring. According to the preparation method of the C-shaped disc spring, the wire is rolled and integrally formed, and then tempering and shaping are carried out, so that the C-shaped disc spring prepared by the invention meets the use requirement of products, and the material cost can be greatly reduced.

Description

Preparation method of C-shaped disc spring

Technical Field

The invention relates to a preparation method of a spring, in particular to a preparation method of a C-shaped disc spring.

Background

A C-shaped disc spring is shown in fig. 1 and 2, and comprises acircular metal sheet 01 provided with aradial opening 04, wherein aninner ring 02 of thecircular metal sheet 01 is higher than anouter ring 03, and the radial section of the circular metal sheet is trapezoidal; the joint between theinner ring 02 and theouter ring 03 is flat.

The existing preparation method adopts a whole steel plate to prepare the C-shaped disc spring through the processes of stamping, pressure quenching, tempering and the like, although the process is simple, the generated waste materials are more, and the material consumption cost is higher.

Disclosure of Invention

The invention aims to solve the defects of more material consumption and higher cost of the existing preparation method of the C-shaped disc spring, and provides the preparation method of the C-shaped disc spring.

In order to solve the defects of the prior art, the invention provides the following technical solutions:

the preparation method of the C-shaped disc spring is characterized by comprising the following steps of:

step (1), feeding the wire;

(1.1) sending an instruction to a wire feeding mechanism by a winding mechanism, and feeding a wire to a feeding mechanism by the wire feeding mechanism at a preset speed;

(1.2) conveying the wire to a rolling mechanism by a feeding mechanism, and compacting the wire according to preset pressure in the conveying process;

step (2), rolling;

the coiling mechanism coils the wire into a circular ring structure through an auxiliary tool, and then the shearing mechanism shears the wire to form a circular ring-shaped metal sheet 01 without theradial opening 04;

the auxiliary tool comprises a central shaft, a first circular ring and a second circular ring, wherein the first circular ring and the second circular ring are coaxially sleeved on the central shaft, the outer diameter of the first circular ring is equal to the inner diameter of theinner ring 02, the outer diameter of the second circular ring is equal to the outer diameter of theouter ring 03, and the first circular ring and the second circular ring with different sizes are selected according to requirements; the distance between the upper surface of the first circular ring and the lower surface of the second circular ring is equal to the height H of thecircular metal sheet 01;

step (3), tempering;

tempering the ring structure rolled in the step (2) according to a preset tempering temperature, wherein the tempering time is at least 40 minutes;

step (4), opening punching;

and (4) punching the ring structure tempered in the step (3) by using a punch and a punching die to form aradial opening 04, thus obtaining a finished product.

Further, the step (2) further comprises: welding the rolled ring structure by using a welding device, wherein welding points are the head end and the tail end of the wire rod, and polishing a welding opening by using a polishing device after welding so that the polished solder meets a preset standard; finally, annealing the welding port; the welded ring structure does not need to limit the outer diameter when in use, and the use is more convenient.

Further, in the step (2), the preset criteria are: after polishing, the radial thickness of the solder along the wire is not less than 2mm, and the axial depth of the solder along the wire is not more than 1.5 mm; for securing the welding strength.

Further, the cross section of the wire rod is rectangular, and the ratio of the short side to the long side of the rectangle is 1: 2-8; the C-shaped disc spring is easier to form and has stronger tension.

Further, in the step (3), the tempering treatment specifically includes: sleeving a plurality of circular ring structures on a tempering tool for tempering and shaping, wherein the tempering tool is of an annular structure, and the outer diameter of the tempering tool is larger than the inner diameter of the circular ring structures and is used for ensuring the size precision of the circular ring structures. .

Further, the step (2) further comprises: and taking the first rolled circular ring structure as a sample, and adjusting the size of the subsequently rolled circular ring structure according to the sample.

Further, in the step (1.1), the preset speed is 50 mm-100 mm/min; in the step (1.2), the preset pressure is 0.4MPa to 0.8 MPa; in the step (2), annealing the welding interface specifically comprises: annealing the welding port at 890-930 ℃ for 2-4 s; in the step (3), the preset tempering temperature is 390-410 ℃.

Further, in the step (2), the welding device adopts a butt welding machine, and the grinding device adopts a grinder.

Further, the first circular ring (2) and the second circular ring (3) are in threaded connection with the central shaft (1).

Further, the method also comprises a step (5) of quality inspection, which is specifically as follows:

(5.1) carrying out 100% tension detection on the finished product obtained in the step (4), wherein the tension is set to be more than 8000N;

(5.2) detecting the roundness, the planeness and the inner diameter of the finished product obtained in the step (4);

(5.3) carrying out 100% load detection on the finished product obtained in the step (4);

if the steps (5.1) - (5.3) all meet the standard, packaging the finished product as a qualified product; otherwise, the product is used as a defective product to be recycled.

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

(1) the invention discloses a preparation method of a C-shaped disc spring, which adopts wires to be rolled and integrally formed, and then is tempered and shaped.

(2) The invention discloses a preparation method of a C-shaped disc spring, which is characterized in that a wire is coiled into a circular ring structure through an auxiliary tool, the auxiliary tool comprises a central shaft, a first circular ring and a second circular ring, and the first circular ring and the second circular ring can be freely combined according to the size of a disc spring to be coiled.

Drawings

FIG. 1 is a schematic structural view of a conventional C-shaped disc spring;

fig. 2 is a sectional view a-a of fig. 1.

The reference numerals are explained below: 01-circular ring shaped metal sheet; 02-inner ring; 03-outer ring; 04-radial opening.

FIG. 3 is a schematic structural diagram of an auxiliary tool in an embodiment of a method for manufacturing a C-shaped disc spring according to the present invention;

fig. 4 is a top view of fig. 3.

The reference numerals are explained below: 1-a central axis; 2-a first circular ring; 3-second circular ring.

Detailed Description

The invention will be further described with reference to the drawings and exemplary embodiments.

A preparation method of a C-shaped disc spring comprises the following steps:

in the embodiment, the wire is 50CrV4, the hardness is 44-49 HRC, and the size of the cross section of the wire is 4mm x 16.875 mm;

step (1), feeding the wire;

(1.1) sending an instruction to a wire feeding mechanism by a winding mechanism, and feeding a wire to a feeding mechanism by the wire feeding mechanism at a preset speed to ensure the stable size of a product, wherein the preset speed is 50-100 mm/min;

(1.2) conveying the wire rods to a rolling mechanism by a feeding mechanism, and compacting the wire rods according to a preset pressure in the conveying process, wherein the preset pressure is 0.4-0.8 MPa;

step (2), rolling;

(2.1) the wire rod is coiled for a plurality of circles by the coiling mechanism through an auxiliary tool, the wire rod can generate plastic deformation in the coiling process, so that an integral circular ring structure is formed, and then the wire rod is cut by the cutting mechanism to form acircular metal sheet 01 without aradial opening 04; taking the first rolled circular ring structure as a sample, and adjusting the size of the circular ring structure which is subsequently rolled according to the sample;

referring to fig. 3 and 4, the auxiliary tool comprises acentral shaft 1, and a firstcircular ring 2 and a secondcircular ring 3 which are coaxially sleeved on thecentral shaft 1, wherein the firstcircular ring 2 and the secondcircular ring 3 are in threaded connection with thecentral shaft 1; the outer diameter of the firstcircular ring 2 is equal to the inner diameter of theinner ring 02, the outer diameter of the secondcircular ring 3 is equal to the outer diameter of theouter ring 03, and the firstcircular ring 2 and the secondcircular ring 3 with different sizes are selected according to requirements; the distance between the upper surface of the firstcircular ring 2 and the lower surface of the secondcircular ring 3 is equal to the height H of thecircular metal sheet 01

(2.2) welding the ring structure which is subsequently rolled in the step (2.1) by using a butt welder, wherein welding points are the head end and the tail end of the wire, a grinding wheel machine is used for grinding a welding opening after welding, the radial thickness of the ground welding flux along the wire is not less than 2mm, and the axial depth of the welding flux along the wire is not more than 1.5 mm;

finally, annealing the welding port at 890-930 ℃ for 2 s;

the circular ring structure which is not processed in the step (2.2) needs to limit the outer diameter when in use, and the circular ring structure processed in the step (2.2) does not need to limit the outer diameter when in use;

step (3), tempering;

tempering the ring structure rolled in the step (2) according to a preset tempering temperature, wherein the ring structure is sleeved on a tempering tool in the treatment process, and the outer diameter of the tempering tool is larger than the inner diameter of the ring structure, so that the size precision of the ring structure can be ensured; the treatment time is 40 minutes, and the preset tempering temperature is 390-410 ℃;

step (4), opening punching;

punching the ring structure tempered in the step (3) by using a punch and a punching die to form aradial opening 04, thus obtaining a finished product;

step (5), quality inspection;

(5.1) carrying out 100% tension detection on the finished product obtained in the step (4), wherein the tension is set to be more than 8000N; the tension of the product in this example was 16500N;

(5.2) detecting the roundness, the planeness and the inner diameter of the finished product obtained in the step (4);

(5.3) carrying out 100% load detection on the finished product obtained in the step (4);

if the steps (5.1) - (5.3) all meet the standard, packaging the finished product as a qualified product; otherwise, the product is used as a defective product to be recycled.

The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.

Claims (10)

1. A preparation method of a C-shaped disc spring is characterized by comprising the following steps:

step (1), feeding the wire;

(1.1) sending an instruction to a wire feeding mechanism by a winding mechanism, and feeding a wire to a feeding mechanism by the wire feeding mechanism at a preset speed;

(1.2) conveying the wire to a rolling mechanism by a feeding mechanism, and compacting the wire according to preset pressure in the conveying process;

step (2), rolling;

the coiling mechanism coils the wire into a circular ring structure through an auxiliary tool, and then the shearing mechanism shears the wire to form a circular ring-shaped metal sheet (01) without a radial opening (04);

the auxiliary tool comprises a central shaft (1), a first circular ring (2) and a second circular ring (3) which are coaxially sleeved on the central shaft (1), wherein the outer diameter of the first circular ring (2) is equal to the inner diameter of an inner ring (02), the outer diameter of the second circular ring (3) is equal to the outer diameter of an outer ring (03), and the first circular ring (2) and the second circular ring (3) with different sizes are selected according to requirements; the distance between the upper surface of the first circular ring (2) and the lower surface of the second circular ring (3) is equal to the height H of the circular metal sheet (01);

step (3), tempering;

tempering the ring structure rolled in the step (2) according to a preset tempering temperature, wherein the tempering time is at least 40 minutes;

step (4), opening punching;

and (4) punching the ring structure tempered in the step (3) by using a punch and a punching die to form a radial opening (04), thus obtaining a finished product.

2. The method for manufacturing a C-shaped disc spring according to claim 1, wherein: the step (2) further comprises: welding the rolled ring structure by using a welding device, wherein welding points are the head end and the tail end of the wire, and polishing a welding port by using a polishing device after welding to ensure that the polished welding flux meets a preset standard; and finally, annealing the welding port.

3. The method for manufacturing a C-shaped disc spring according to claim 2, wherein: in the step (2), the preset standard is as follows: after polishing, the radial thickness of the solder along the wire is not less than 2mm, and the axial depth of the solder along the wire is not more than 1.5 mm.

4. The method for manufacturing a C-shaped disc spring according to claim 3, wherein: the cross section of the wire is rectangular, and the ratio of the short side to the long side of the rectangle is 1: 2-8.

5. The method for manufacturing a C-shaped disc spring according to claim 4, wherein: in the step (3), the tempering treatment specifically comprises: sleeving a plurality of circular ring structures on a tempering tool for tempering and shaping, wherein the tempering tool is of an annular structure, and the outer diameter of the tempering tool is larger than the inner diameter of the circular ring structures.

6. The method for manufacturing a C-shaped disc spring according to any one of claims 1 to 5, wherein: the step (2) further comprises: and taking the first rolled circular ring structure as a sample, and adjusting the size of the subsequently rolled circular ring structure according to the sample.

7. The method for manufacturing a C-shaped disc spring according to claim 6, wherein: : in the step (1.1), the preset speed is 50 mm-100 mm/min; in the step (1.2), the preset pressure is 0.4MPa to 0.8 MPa; in the step (2), annealing the welding interface specifically comprises: annealing the welding port at 890-930 ℃ for 2-4 s; in the step (3), the preset tempering temperature is 390-410 ℃.

8. The method for manufacturing a C-shaped disc spring according to claim 7, wherein: in the step (2), the welding device adopts a butt welding machine, and the polishing device adopts a grinding wheel machine.

9. The method for manufacturing a C-shaped disc spring according to claim 8, wherein: the first circular ring (2) and the second circular ring (3) are in threaded connection with the central shaft (1).

10. The method for manufacturing a C-shaped disc spring according to claim 9, wherein: the method also comprises the step (5) of quality inspection, which specifically comprises the following steps:

(5.1) carrying out 100% tension detection on the finished product obtained in the step (4), wherein the tension is set to be more than 8000N;

(5.2) detecting the roundness, the planeness and the inner diameter of the finished product obtained in the step (4);

(5.3) carrying out 100% load detection on the finished product obtained in the step (4);

if the steps (5.1) - (5.3) all meet the standard, packaging the finished product as a qualified product; otherwise, the product is used as a defective product to be recycled.

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