JPS60102210A - Production of metallic endless band - Google Patents

Abstract

PURPOSE:To produce an endless band with a reduced number of stage by forming an annular wire rod by casting into a circular section having a prescribed circumferential length and section and adjusting the circumferential length and thickness of such annular wire rod to a prescribed size by rolling. CONSTITUTION:An annular metallic wire rod 1a having a circular section equal to or slightly shorter than a product circumferential length is formed by casting. Such wire rod 1a is attached to a rolling device 60 consisting of a forming roll 30 with rolling, a press roll 40 and a tension roll 50. The wire rod 1a is turned under the constant tension kept applied at all times by the roll 50 and is crushed to have the increased length and width by the rolls 30, 40. Such wire rod is further subjected to the forming operation of increasing the length and decreasing the width by a stretching machine and is finished to the prescribed thickness and circumferential length. The metallic endless band 1c is thus produced.

Description

[Detailed description of the invention] 1 field] The present invention relates to a method of manufacturing an endless metal band.

[Prior Art] A conventional method for manufacturing a metal endless band is to forge a metal block with a predetermined thickness to form a pipe material 10a as shown in FIG.
is formed and cut by machining into a cylindrical pipe material 10b with a predetermined wall thickness as shown in FIG. As shown in the figure, a thin-walled pipe material 10c is manufactured by spinning to form a predetermined external shape, and this thin-walled pipe material 10c is fixed to a chuck of a lathe, and a disc-shaped cutter is pushed from both sides from a rotating shaft. A circular wire rod 10d having a cross section of 1] is manufactured by cutting it with a slitter as shown in FIG. 30 presser rolls 40, and a tension roll 50 that is parallel to the roll-forming roll 30, is supported so that the distance L between its axes to the roll-forming roll 30 can be varied, and has a highly accurate diameter. While keeping a constant tension on the material, it is rotated and pressed by a rolling forming roll 30 and a presser roll 40 to lengthen the length and width. At the same time, a stretching process is performed to extend the length and reduce the width. As shown in Fig. 6, the metal endless band 10c is finished to a predetermined thickness and circumference. In order to prevent damage, both end surfaces 11 were processed into an arcuate shape by grinding to produce a metal endless band 10f with smooth cross-sectional ends at both ends as shown in FIG. For this reason, there are many machining steps, which increases the manufacturing cost, and in particular, machining of both end faces 11 requires grinding the entire circumference of both end faces with a polishing machine, which takes time and effort.

[Object of the Invention] The object of the present invention is to provide a method for manufacturing a metal endless band that can reduce the number of steps, can be manufactured at low cost, and in particular can maintain conventional accuracy and function even if the grinding process on both end faces is omitted. On offer.

[Structure of the Invention] The method for manufacturing a metal endless band of the present invention includes a step of producing a circular wire rod having a predetermined circumference and a circular cross section by casting, and adjusting the circumferential length and plate pressure of the annular wire rod. It consists of a step of adjusting to a predetermined size by rolling.

[Effect of the invention] The above configuration provides the following effects.

b) By rolling a wire rod with a circular cross section, an arcuate end face is inevitably produced even without end face processing to increase the fatigue strength of the end face.

b) The number of steps up to rolling can be reduced because the circular wire rod is manufactured by casting, and the manufacturing period can be shortened, making product management easier.

c) Conventional accuracy and functionality can be maintained.

[Example] The method for manufacturing a metal endless band of the present invention will be explained based on the example shown in FIGS. 8 to 11.

As shown in Fig. 8, heat treatment, workability, welding, and 1. A round wire rod made of metal such as tangled 18% nickel maraging steel or precipitation hardening stainless steel, or a wire rod with a cross section such as an ellipse or an oval (a wire rod with a circular cross section) is 10 cm) or slightly self-casting annular wire 1a is manufactured.

As shown in FIG. 9, the annular wire rod 1a is
0, a presser roll 40 of the roll 30, and a tension roll 50 that is parallel to the roll-forming roll 30, is supported so that the distance L between its axes with the roll-forming roll 30 can be changed, and has a high-precision diameter. At the same time as the rolling process, the stretching machine is attached to the rolling processing device 60, which is rotated while keeping constant tension applied with the tension roll 50, and is crushed by the rolling forming roll 30 and the presser roll 40 to elongate the length and width. The annular wire rod 1b is stretched around a male die and wound to extend the length and shorten the width, resulting in a predetermined thickness and circumference. An endless band 1c is manufactured.

As shown in FIG. 11, without machining both end surfaces 11, an arc-shaped cross-sectional diameter (for example, 0.15 to 0.20 mm) and circumference (
For example, the metal endless band 1c is 5 to 10 cm long.

The metal endless bunt manufactured in this way has a weight of 10
The blocks can be stacked in layers and used as a transmission belt for a V-belt continuously variable transmission, or can be used as a grinding belt by providing abrasive grains on the outer peripheral surface.

[Brief explanation of the drawing]

Fig. 1 is a process explanatory diagram of a conventional method for manufacturing endless metal bands, Fig. 2 is a process explanatory diagram of a conventional method for manufacturing endless metal bands, and Fig. 3 is a process explanatory diagram of a conventional method for manufacturing endless metal bands. Process explanatory diagrams, Fig. 4 is a process explanatory diagram of a conventional metal endless band manufacturing method, Fig. 13 is a process explanatory diagram of a conventional metal endless band manufacturing method, and Fig. 6 is a conventional metal endless band manufacturing method. 7 is a process explanatory diagram of the conventional method for manufacturing an endless metal band. FIG. 8 is a process explanatory diagram of the method of manufacturing an endless metal band of the present invention. FIG. 10 is an explanatory diagram of the steps involved in the method for manufacturing an endless metal band of the present invention. FIG. 11 is an explanatory diagram of the steps involved in the method for manufacturing the endless metal hand of the present invention. It is an explanatory diagram. In the figure 1a...Circular wire 1b...Metal endless band 1c...Metal endless band fee]] 1 person (i
Kurokano 2Figure 1Figure 4Figure 5Figure 5'C6Figure 657

Claims (1)

[Claims] 1) A metal comprising the steps of: making an annular wire rod having a predetermined circumference and a predetermined cross section by casting; and adjusting the circumference and sheet pressure of the annular wire rod to predetermined dimensions by rolling. Manufacturing method for endless bands. 2) The method for manufacturing an endless metal band according to claim 1, wherein the annular wire has a circular cross section.