WO2016023381A2

WO2016023381A2 - Ring metal belt processing technique

Info

Publication number: WO2016023381A2
Application number: PCT/CN2015/076628
Authority: WO
Inventors: 权明勇
Original assignee: 权明勇
Priority date: 2014-08-13
Filing date: 2015-04-15
Publication date: 2016-02-18
Also published as: CN104148900A; WO2016023381A3

Abstract

A ring metal belt processing technique. Shaping by spinning and pressuring is used to process a ring metal belt. The perimeter of a steel pipe is determined by matching the outer diameter of a core rod and the inner diameter of the metal pipe. A pipe is shaped by spinning and pressuring, and is then cut into numerous different steel belts according to different width requirements. Compared to traditional methods, the control method is simple, precisely controls the perimeter, and enhances the product pass rate, thereby enhancing the production efficiency of ring steel belts.

Description

Processing technology of annular steel strip

Technical field

The invention relates to a processing technology of an annular steel strip, in particular to a processing technology which can be used for producing an endless steel strip of a continuously variable transmission.

Background technique

In the automotive metal belt type continuously variable transmission, the metal belt is the core transmission component, and the metal strip ring group is the tensioning element of the metal belt.

At present, in the automotive industry, the production method of the steel strip used in the continuously variable transmission is usually performed by welding a thick steel strip and then cold pressing or hot pressing to thin the steel strip to produce a desired endless steel strip; for example, Rolling a piece of equal-width metal strip into a cylindrical shape, welding the butt joint into a closed steel strip, and then cutting into a number of steel rings according to the required width, rolling each steel ring into a certain thickness and circumference on the rolling mill Steel ring. In this process, the steel strip is thinned by cold pressing or hot pressing to bring the steel strip to the desired circumference.

However, in fact, during the cold pressing or hot pressing process, the circumference of the annular steel strip is constantly changing. Therefore, it is difficult to precisely control the circumference, resulting in the circumferential length of the processed annular steel strip not reaching the target size. The ratio is high, resulting in rework or material waste, especially in mass production, the product qualification rate is low.

Summary of the invention

In order to make up for the deficiencies of the prior art, the present invention provides a novel processing technology of an endless steel strip, which is mainly used to make the steel strip thin by means of spinning, and the method is simple and convenient to operate and can be effectively controlled. The circumferential precision of the endless steel strip improves the yield of the product.

In order to achieve the above object, the technical solution adopted by the present invention is:

A novel processing technique for an endless steel strip, the steps comprising, and preferably as follows:

Step 1. Select an appropriate metal material;

Step 2: forming the selected metal material into a blank tube;

Step 3: inserting the prepared blank tube into the mandrel bar of the spinning machine;

Step 4: Start the spinning machine to rotate the spinning mandrel at a high speed, and drive the spinning roller knife to move the blank tube up and down or left and right to stretch the blank tube, so that the thickness of the blank tube becomes thinner and the length becomes longer until The length and thickness of the blank tube reach the target Mark the size, stop the spinning machine and get the endless steel strip.

Or the processing of the above-mentioned annular steel strip of the present invention may further comprise the step of cutting the obtained endless steel strip.

In a preferred embodiment of the invention, the processing of the endless steel strip, the steps comprising, and preferably the steps are as follows:

Step 1. Select an appropriate metal material;

Step two, the selected metal material is formed into a blank tube by punching or ring welding;

Step 3, inserting the blank tube prepared in the second step on the movement rod of the spinning machine;

Step 4: Start the spinning machine to rotate the core rod of the spinning machine at a high speed, and drive the spinning roller knife to move the blank tube up and down or left and right to stretch the blank tube, thereby making the thickness of the blank tube thin and the length becoming longer. ;

Step 5: Observing the thickness, length and diameter of the blank tube in step 4, when the thickness and length of the blank tube reach the target size, and the inner diameter of the blank tube is matched with the outer diameter of the mandrel rod, the spinning machine is stopped;

Step 6. Cut the tube after the spinning in step 5 according to a certain width, and the cut tube is an annular steel strip.

In the above content of the present invention, the steel ring is not necessarily made of a steel material, but may be made of other metal (including alloy) materials. Therefore, further, in the first step, the metal material may be It is any material that can be used for the steel strip in the automotive metal belt type continuously variable transmission, and is preferably any one or more of a stainless steel material, a copper material, an aluminum material, and other metal materials.

Further, in the second step, the thickness of the blank tube is generally at least 0.1 mm, more preferably at least 0.12 mm, more preferably from 0.1 mm to 10 mm, still more preferably from 0.11 mm to 7 mm, still more preferably from 0.12 mm to 5 mm. Such as 0.15mm-4.5mm, 0.2mm-4mm, 0.25mm-3.5mm, 0.5mm-3mm, 1mm-2.5mm, 1.5mm-2mm.

In the above aspect of the invention, the difference between the inner diameter of the blank tube and the outer diameter of the core rod is preferably controlled within a range of 0 mm to 0.05 mm.

Further, in the second step, the inner diameter of the blank tube is 18 mm to 350 mm, more preferably 20 mm to 300 mm, still more preferably 30 mm to 250 mm, still more preferably 40 mm to 200 mm, still more preferably 50 mm to 150 mm, still more preferably 60 mm to 120 mm, more preferably 70 mm to 100 mm, still more preferably 75 mm to 90 mm.

Wherein the tolerance of the inner diameter is preferably controlled within a range of ±0.05 mm.

Further, the outer diameter of the movement rod in the third step is usually 18 mm to 350 mm, and more preferably 20 mm to 300 mm, more preferably 30 mm to 250 mm, still more preferably 40 mm to 200 mm, still more preferably 50 mm to 150 mm, still more preferably 60 mm to 120 mm, still more preferably 70 mm to 100 mm, still more preferably 75 mm to 90 mm.

Further, in step 6, the certain width is usually 3 mm to 200 mm.

Compared with the prior art, according to the above solution, the beneficial effects of the present invention are: the invention utilizes a spinning method to process the endless steel strip, and the outer diameter of the mandrel rod is matched with the inner diameter of the steel tube to determine the circumference of the steel tube. The control method is simple, and the circumference of the endless steel strip can be accurately controlled compared with the conventional method, and the yield of the product can be improved; after the spinning is successful by one tube, a plurality of different steels can be cut according to different width requirements. The belt is convenient for improving the production efficiency of the endless steel strip.

DRAWINGS

1 is a schematic view showing the processing flow of a toroidal steel strip according to the present invention.

detailed description

The invention will now be further described in conjunction with the examples.

The processing technology of an annular steel strip is characterized in that the specific process flow of the processing method is as follows:

Step 1. Select the appropriate metal material

In this step, the metal material is a stainless steel material, a copper material, an aluminum material, or other metal materials.

Step 2. The selected metal material is bent into a blank tube by stamping or ring welding.

In this step, the blank tube is usually a relatively thick tube having a thickness of generally 0.12 mm to 5 mm and an inner diameter of 18 mm to 350 mm, wherein the tolerance of the inner diameter is controlled to ±0.05 mm.

In this step, the inner diameter of the blank tube is made uniform with the outer diameter of the spinning mandrel by stamping or ring welding.

Note: The outer diameter of the spinning mandrel must be the same as the inner diameter of the blank tube, and the uniform error range is within ±0.05mm.

Step 3: Insert the blank tube obtained in the second step on the movement rod of the spinning machine

In this step, the outer diameter of the mandrel will be determined according to the requirements of the automobile factory or the continuously variable transmission manufacturer, and the general range is 18mm-350mm.

Step four, spinning

Start the spinning machine to rotate the spinning mandrel at a high speed, and drive the spinning roller to extend the blank tube up and down or left and right, so that The blank tube is stretched to make the thickness of the blank tube thin and the length becomes long.

Step 5, stop spinning

Observe the thickness, length and inner diameter of the blank tube in step 4. When the thickness and length of the blank tube reach the target size, and the inner diameter of the blank tube is attached to the outer diameter of the mandrel rod, the spinning machine is stopped.

Step six, cutting

The tube after the spinning in step 5 is cut according to a certain width, and the cut tube is an endless steel strip.

In this step, the "certain width", the specific size is determined according to the requirements of the automobile factory or the continuously variable transmission manufacturer, and the general width ranges from 3 mm to 200 mm.

Example 1: Taking stainless steel material as an example:

Step 1. Select an appropriate stainless steel material;

Step two, using a method of stamping and stretching to form a stainless steel material into a blank steel pipe; the thickness of the pipe is controlled at 0.4 mm; the inner diameter is 75 mm;

Step 3: selecting a mandrel bar having an outer diameter of 75 mm, and inserting the blank tube into the mandrel bar of the spinning machine;

Step 4: Start the spinning machine to rotate the spinning mandrel at a high speed, and drive the spinning roller blade to move the blank tube up and down to stretch the blank tube, thereby making the thickness of the blank tube thin and the length becoming longer;

Step 5: Observe the thickness, length and inner diameter of the blank tube after the lengthening in step 4, when the thickness of the blank tube reaches 0.1 mm, the length after stretching is about 4 times the length of the original blank tube, the inner diameter of the blank tube and the core rod When the outer diameter of the outer diameter is applied, the spinning machine is stopped; in step 6, the tube after the spinning in step 5 is cut according to the width of 3 mm, and the cut tube is an annular steel strip (thickness 0.1 mm, width 3 mm, The perimeter is 235.50mm).

One of the current difficulties in the production of steel strips for the continuously variable transmission in the automotive industry is that there is no way to precisely control the circumference of the endless steel strip. The present invention solves the problem of precise control of the circumference, and according to the present invention, an annular steel strip for a continuously variable transmission is produced. It is easier and has a very precise control of the circumference of the steel strip.

In order to solve the problem of precise control of the circumference of the steel strip, the present invention makes the thick annular steel strip thin by spinning, so that the outer diameter of the spinning rod is 3.14 times the inner circumference of the steel strip; because of the spinning movement The outer diameter of the rod is very easy to process and control, so the circumference of the strip will be easy to control.

The invention utilizes the method of spinning to process the annular steel strip, determines the circumference of the steel tube by using the outer diameter of the mandrel rod and the inner diameter of the steel tube, and has a simple control method, and can accurately control the annular steel strip compared with the conventional method. The perimeter is used to improve the pass rate of the product; after successful spinning through a pipe, many different steel strips can be cut according to different width requirements, which is convenient for improving the production efficiency of the endless steel strip.

The specific embodiments of the present invention have been described in detail above, but are merely exemplary, and the invention is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to the invention are also within the scope of the invention. Accordingly, equivalents and modifications may be made without departing from the spirit and scope of the invention.

Claims

A processing technology for an annular steel strip, characterized in that the processing steps include:

Step 1. Select an appropriate metal material;

Step 2: forming the selected metal material into a blank tube;

Step 3: inserting the prepared blank tube into the mandrel bar of the spinning machine;

Step 4: Start the spinning machine to rotate the spinning mandrel at a high speed, and drive the spinning roller knife to move the blank tube up and down or left and right to stretch the blank tube, so that the thickness of the blank tube becomes thinner and the length becomes longer until The length and thickness of the blank tube reach the target size, and the spinning machine is stopped to obtain an endless steel strip.
The processing method of the endless steel strip according to claim 1, wherein in the first step, the metal material is any one or more of a stainless steel material, a copper material, an aluminum material or other metal materials.
The processing method of the endless steel strip according to claim 1, wherein in the second step, the thickness of the blank tube is generally 0.12 mm to 5 mm.
The process for processing an endless steel strip according to claim 3, wherein in the second step, the thickness of the blank tube is 0.4 mm.
The processing method of the endless steel strip according to claim 1, wherein in the second step, the inner diameter of the blank tube is 18 mm to 350 mm, wherein the tolerance of the inner diameter is controlled to be ±0.05 mm.
The process for processing an endless steel strip according to claim 5, wherein in the second step, the inner diameter of the blank tube is 75 mm.
The processing technology of the endless steel strip according to any one of claims 1 to 5, wherein in the step (3), the difference between the inner diameter of the blank tube and the outer diameter of the core rod is between 0 mm and 0.05. Within the range of mm.
The processing technology of the endless steel strip according to claim 1, wherein the specific process flow of the processing technology is as follows:

Step 1. Select an appropriate metal material;

Step two, the selected metal material is formed into a blank tube by punching or ring welding;

Step 3, inserting the blank tube prepared in the second step on the movement rod of the spinning machine;

Step 4: Start the spinning machine to rotate the spinning mandrel at a high speed, and drive the spinning roller knife to move the blank tube up and down or left and right to stretch the blank tube, thereby making the thickness of the blank tube thin and the length becoming longer;

Step 5: Observe the thickness length and inner diameter of the blank tube in step 4, when the thickness and length of the blank tube reach the target Size, and when the inner diameter of the blank tube is attached to the outer diameter of the mandrel, the spinning machine is stopped;

Step 6. Cut the tube after the spinning in step 5 according to a certain width, and the cut tube is an annular steel strip.
The processing technology of the endless steel strip according to claim 8, wherein in the step 6, the certain width is usually 3 mm to 200 mm.