JP-7856065-B2 - Progressive die press and control method

JP7856065B2JP 7856065 B2JP7856065 B2JP 7856065B2JP-7856065-B2

Inventors

金原宏

Assignees

トヨタ自動車株式会社

Dates

Publication Date: 20260511
Application Date: 20230718

Claims (4)

A conveying section for transporting strip-shaped steel plates, Multiple presses arranged in the direction of conveyance of the aforementioned strip-shaped steel plate, A printing section for printing outlines indicating punching locations of the multiple presses onto the strip-shaped steel plate, A recognition unit that recognizes the shape of the outline after punching out the strip-shaped steel plate, Equipped with, A progressive press apparatus that sequentially punches out the strip-shaped steel plate, on which the outline lines have been printed by the printing unit, using a plurality of presses while the plate is being transported by the transport unit, based on the outline lines, Based on the shape of the contour line recognized by the recognition unit, the transport unit controls at least one of the feed amount in the transport direction and the movement amount in the width direction. Progressive die press machine.
The recognition unit recognizes the shape of the contour line using an image, In the aforementioned image, when the outline of the strip-shaped steel plate is missing due to punching, the conveying unit controls at least one of the feed amount in the conveying direction and the movement amount in the width direction. The progressive press apparatus according to claim 1.
Based on the amount and direction of misalignment between the contour line of the strip-shaped steel plate and the edge of the hole formed by punching, at least one of the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit is controlled. The progressive press apparatus according to claim 1 or 2.
A control method for a progressive press apparatus that transports a strip of steel plate on which outline lines indicating punching locations for multiple presses are printed, and sequentially punches the steel plate using the multiple presses based on the outline lines, The shape of the outline after punching out the strip-shaped steel plate is recognized, Based on the recognized contour shape, control at least one of the feed amount in the transport direction and the movement amount in the width direction of the strip-shaped steel plate. The computer performs the process. Control method.

Description

This disclosure relates to a progressive die press and a control method. Motor cores, such as rotor cores and stator cores, are formed by laminating electrical steel sheets. These electrical steel sheets are punched out, for example, using a press. To prevent misaligned punched holes from being laminated, technologies are being developed to eliminate misalignment in the punching process. For example, Patent Document 1 discloses a progressive press device that eliminates misalignment of the punching position. The progressive press device disclosed in Patent Document 1 has load sensors on all four sides of a pilot pin that serves as the reference for punching. The progressive press device disclosed in Patent Document 1 eliminates misalignment of the punching position based on the load results in the four directions (up, down, left, and right) relative to the feed direction. Japanese Patent Publication No. 2019-047689 This is a block diagram of a progressive press apparatus according to Embodiment 1.This is a plan view of a progressive press machine according to Embodiment 1.This is a flowchart showing the operation flow of the progressive press machine according to Embodiment 1.This figure shows a portion of a strip of steel sheet after punching using the progressive press apparatus according to Embodiment 1.This is a block diagram of a progressive press apparatus according to Embodiment 2.This is a plan view of a progressive press machine according to Embodiment 2. The present disclosure will be described below through embodiments of the invention, but the invention claimed is not limited to the following embodiments. Furthermore, not all configurations described in the embodiments are necessarily essential for solving the problem. For clarity, the following descriptions and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are denoted by the same reference numerals, and redundant explanations have been omitted where necessary. Naturally, the right-handed xyz Cartesian coordinate system shown in the drawings is for convenience in explaining the positional relationships of the components. Typically, the positive z-axis direction is vertically upward, and the xy-plane is the horizontal plane. (Embodiment 1) <Configuration of a progressive press machine> First, the configuration of the progressive press apparatus will be explained with reference to Figures 1 and 2. Figure 1 is a block diagram of the progressive press apparatus according to Embodiment 1. Figure 2 is a plan view (xy plan view) of the progressive press apparatus according to Embodiment 1. As shown in Figure 1, the progressive press apparatus 10 according to Embodiment 1 comprises a transport unit 11, a pressing unit 12, a printing unit 13, a control unit 14, and a recognition unit 15. Note that Figure 2 omits the printing unit 13, control unit 14, and recognition unit 15. First, the strip steel sheet 40 and the conveying unit 11 will be explained. Motor cores such as rotor cores and stator cores are formed by laminating the steel sheets 50 shown in Figure 2. The steel sheets 50 are formed by punching out the strip steel sheet 40 using a progressive press device 10. Figure 2 shows the case of forming a steel sheet 50 for a rotor core. As shown in Figure 2, the strip steel sheet 40 is installed in the progressive press device 10. The strip steel sheet 40 is usually prepared in a coiled state (not shown). As shown in Figure 2, the conveying section 11 consists of a feeder 21 and guide rollers 31. The feeder 21 is composed of a pair of rollers that sandwich the material from above and below; one is the drive roller, and the other is the driven roller. In the example shown in Figure 2, the feeder 21 moves the strip steel plate 40 in the positive x-axis direction. That is, the positive x-axis direction is the conveying direction of the strip steel plate 40. Furthermore, the negative x-axis direction side is referred to as the upstream side of the progressive press device 10, and the positive x-axis direction side is referred to as the downstream side of the progressive press device 10. As shown in Figure 2, the feeder 21 transports the strip-shaped steel plate 40 from the upstream side to the downstream side. In the example shown in Figure 2, feeders 21 are provided on both the upstream and downstream sides of the progressive press machine 10, and either one or both constitute the feeding mechanism. As shown in Figure 2, the guide rollers 31 are cylindrical driven rollers positioned to contact both ends of the strip-shaped steel plate 40, with their central axis aligned with the z-axis direction. The guide rollers 31 are provided at predetermined intervals in the conveying direction of the strip-shaped steel plate 40. In the example shown in Figure 2, four guide rollers 31 are provided on one side, for a total of eight guide rollers 31. The feed amount in the transport direction between the feeder 21 and the gu