JPH01306034A - Cutting method for metallic wire rod - Google Patents

Abstract

PURPOSE:To improve operating efficiency and quality by removing bends, etc., of a wire rod by a strainer, then, heating it continuously in an electromagnetic induction furnace, then, cutting it with a high speed cutting device. CONSTITUTION:The wire rod 1 is passed through a strainer 2 to remove bends and twists, fed out by feed rolls 2b into a heating cylinder 3a of an electric induction furnace 3 and heat-treated continuously. When the wire 1 is heated continuously in the heating cylinder 3a, heat is transmitted from the peripheral surface of the wire rod 1 shown by arrows 1a-1d to the central direction and quenched completely to the central part of the wire rod 1. Thermal stress is stabilized and the cut wire 7 which has been cut by a high speed cutting machine 6 is not deformed. As a result, the metallic wire rod used as a shaft of a small motor, etc., can be shipped as a product directly after it is cut, operating efficiency is improved and quality, too, is graded up.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Applicability The present invention relates to the improvement of small motors, etc., for which there is a demand for 10ffi trees in Japan and about 2 billion in the world. It is.

2. Description of the Related Art As shown in FIG.
- The bending of the metal wire 2 is removed by the burner 2 to make it into a straight state, and the cutting shaft 7 is cut into the desired length by the cutting machine 6 driven by the motor 5 after passing through the guide 3. A heat treatment is performed at about 1000 degrees for about 3 hours to obtain a hardened and cut shaft 9. The reason for performing the heat treatment in this manner is to prevent the cutting shaft 7 from being broken when used as a motor shaft due to variations in the degree of hardening.

Thereafter, the cut shaft that has been heat treated in the heat treatment furnace 8 is subjected to a tempering process 10 and a straightening process 11 to correct deformation and is shipped as a duplicate product (shipment 12).

The above tempering step 10 and straightening step 11 include approximately 61+,
It takes 10 hours from 'i' to each tempering process.
- The disadvantage is that labor is required for transportation and work in each process such as the straightening process, which increases labor costs and makes it extremely difficult to reduce product costs.

Furthermore, with the conventional cutting method, it took about three days for the product to be shipped, and the work efficiency was extremely poor.

Problems to be Solved by the Invention The present invention can manufacture products in a shorter time than conventional cutting methods, can significantly reduce manufacturing costs, has very high work efficiency, and can be easily deformed. The object of the present invention is to provide a method for manufacturing shafts for small motors, etc., with a small amount of friction.

[Structure of the invention] Means for solving the problems In order to solve the above problems, the present invention provides a straightener.
After removing bends, etc. from the wire, the wire was heated continuously using an electrical induction heating device, and then cut at high speed.

Operation and Embodiments The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing the manufacturing method of the present invention, and FIG. 2 is a cross section of a wire showing the state of the hardening effect.

Reference numeral 1 is a wire rod, and reference numeral 2 is a straightener.

The wire rod 1 usually has chamfers and twists, so when cutting it into a product such as a shaft for a small motor, it is first necessary to remove the chamfers and twists. Therefore,
Since it is necessary to remove these bends and twists from the wire 1 with the straightener 2, the wire 1 is fed into the straightener 2 by the feed roller 28, and the wire that has passed through the straightener 2 is then fed into the straightener 2. roller 2b
It is sent out into the heating cylinder of the induction heating device 3 and subjected to continuous heat treatment.

When continuous heating is performed in the heating cylinder of this electric induction heating device M3, heat is transmitted from the outer peripheral surface of the wire rod 1 toward the center as shown by arrows 1a, 1b, 1G, and 1d in FIG. Since it is completely hardened to the center, thermal stress is stabilized, and the cutting line 07 after cutting by the high-speed cutting machine 6 is not deformed.

The heating temperature is from 900 degrees Celsius to 100 degrees Celsius. 1 Rapid heat treatment using induction heating device 3 (
The wire 1 that has been heat-treated is guided by a guide 4 and inserted into a high-speed cutting machine 6 driven by a motor 5, where it is cut at high speed (2
00O8PM).

In this way, in the present invention, the wire 1 is heated continuously at 200 O
The purpose is to continuously cut with a 3PM high-speed cutting machine 6.

[Effects of the invention] Since the present invention has the above-described configuration, the heat treatment process using a heat treatment furnace, the tempering process, and the straightening process that were conventionally necessary are no longer necessary, and the product can be cut immediately after cutting with a machine. This allows us to reduce the number of personnel required for each process, and significantly reduces JA manufacturing costs, allowing us to supply A7 shafts such as low-priced small motors, and to produce products immediately after cutting. This has the effect of greatly improving work efficiency in that it can be shipped as a standard product.

It also has the effect of increasing the desire to improve quality.

In other words, continuous heat treatment stabilizes thermal stress and reduces deformation after cutting to about half that of conventional methods, which is essential for consumers who purchase and use products manufactured by the present invention. This has the effect that the time required for the necessary 1i11 polishing step can be significantly shortened by λ0.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the manufacturing process of the present invention, Fig. 2 is a diagram showing the state of the hardening effect when heat-treated according to the present invention, and Fig. 3 is a schematic diagram showing the steps of the conventional manufacturing method. . 1...Wire rod 2...Straightener 2a, 2b...
・Feed roller 3...Denji induction heating pupil 3a...
・Heating cylinder 4...Guide 5...Motor 6...
・Cutting machine 7... Cutting wire rod 8... Heat treatment furnace 9.
... Heating wire rod 10 ... Tempering process 11 ... Straightening process 12 ... Product shipping

Claims (1)

[Claims] A method for cutting a metal wire, which comprises removing bends in the wire using a straightener, continuously heating the wire using an electric induction heating device, and then cutting the wire using a high-speed cutting device.