JP2011200922A - Material position detection and control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently perform the positioning when integrally forming a plurality of components by detecting the position of a material to be machined near the most important and final process, and controlling the feed of the material.SOLUTION: A material position detection and control device includes a light source 30 provided with a pair of dies 21, 22 for performing a plurality of processes while intermittently feeding a material F at the predetermined interval, and embedded in one die 21 to emit parallel light while a material position detection hole F1 being formed in the material F, a position detector 31 which is embedded in the other die 22 to detect the feed deviation from the reference position based on the projecting position of the passing light by the material position detection hole F1, and a controller 40 for feeding the material F by correcting the set feed of the material F based on the feed deviation.

Description

  The present invention relates to a material position detection control device for controlling a relative position between a material to be processed and a mold or another processed material to be combined, in particular, in an integrated molding press by a multi-step combination.

  Conventionally, a progressive die is configured to perform a plurality of processing steps sequentially along the material flow direction. In such a progressive die, for example, a punch for processing a plurality of different shapes arranged at equal intervals, a pilot punch and a pilot die provided in a first step punch among the plurality of punches, and a pilot punch There is a second-stage and subsequent punched pilot pin provided at a position distant for each mold pitch, and a material fed from the first punching die is positioned by the pilot pin and sequentially processed (Patent Document 1). , 2).

Japanese Patent Laid-Open No. 08-52598 Japanese Patent No. 2008-302392

  As described above, the position control of the material in the conventional mold is performed by forcibly correcting the position by pushing the position control hole formed in the material into the pilot pin standing on the mold. A pin is provided for each sequential feed process, but the feed position on the feeder side is corrected by pushing into this pilot pin by the first pilot pin (closest to the feed unit). The other steps are only forced to position by applying stress to the material.

  Accordingly, when one process is completed and the pilot pin is removed, the misalignment corrected by the stress is restored again, and the misalignment is integrated and increased as the process proceeds.

  On the other hand, when caulking a plurality of parts in the final process of integral molding, for example, it is necessary to push the burring protrusion after aligning it with the other hole position, so alignment by pushing into the pilot pin is not possible, It is a big problem in the processing of micro parts.

  The present invention has been made in view of such circumstances, and detects the position of the material to be processed in the vicinity of the most important final process, and controls the feed amount of the material to control the position at the time of integral molding of a plurality of parts. An object of the present invention is to provide a material position detection control device that can perform matching well.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention described in claim 1
Provided with a pair of molds that process multiple processes while intermittently feeding materials at regular intervals,
The material is formed with a material position detection hole,
Based on the projection position of the passing light by the light source means for emitting parallel light embedded in the one mold and the material position detecting hole embedded in the other mold, the amount of deviation from the reference position is detected. Position detecting means;
A material position detection control device comprising control means for feeding the material by correcting the feed amount set for the material based on the feed deviation amount.

The invention described in claim 2
The light source means irradiates parallel light having a cross-sectional area larger than the cross-sectional area of the material position detecting hole,
The position detection means compares the projection position of the passage light of the parallel light by the material position detection hole and a preset reference position,
2. The material position detection control device according to claim 1, wherein a difference in the projection position with respect to the reference position is detected as a feed shift amount.

The invention according to claim 3
The material position detection control device according to claim 1 or 2, wherein the feed amount of the material is detected and controlled one step before the final step.

  With the above configuration, the present invention has the following effects.

  The invention according to claim 1 includes a pair of molds that perform a plurality of processes while intermittently feeding the material at regular intervals, and from the reference position based on the projection position of the passing light by the material position detection hole of the material. The feed amount of the material is detected, the material feed amount is corrected based on the feed deviation amount, and the material is fed, so the position of the material processed near the most important final process is detected, and the feed amount of the material is By controlling, it is possible to satisfactorily align the plurality of parts at the time of integral molding. Further, it is possible to perform alignment in a process in which the pilot pin cannot be used for controlling the material feeding position.

  In the invention described in claim 2, the light source means emits parallel light having a cross-sectional area larger than the cross-sectional area of the material position detecting hole, and the position detecting means projects the parallel light passing light through the material position detecting hole. By comparing the position with a preset reference position, the difference in projection position with respect to the reference position can be easily and accurately detected as the amount of feed deviation.

  In the invention according to the second aspect, the material feed amount is detected and controlled one step before the final step, and since the material is not stressed by processing or the like from the detection to the material feed, the final step is performed. The movement of the material can reflect the feed amount on the material feeder side as it is, and the workpiece of the material can be aligned at the assumed position.

It is a schematic block diagram of a material position detection control system. It is a block diagram of a metal mold | die. It is a figure explaining the position detection of a material.

  Embodiments of the material position detection control device of the present invention will be described below. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  FIG. 1 is a schematic configuration diagram of a material position detection control system, FIG. 2 is a configuration diagram of a mold, and FIG. 3 is a diagram for explaining material position detection.

  As shown in FIG. 1, the material position detection control device of this embodiment is provided in a material feeding device 10 and a press machine 20.

  The material feeding device 10 is arranged in a state where the material F is wound around the feeding shaft 11, and the material F is fed by the rotation of the pair of feeding rolls 12. The amount of rotation of the pair of feed rolls 12 is controlled by the driving force from the stepping motor 13.

  The material F is made of a thin metal plate made of stainless steel, copper, a copper alloy, aluminum, or the like.

  As shown in FIG. 2, the press machine 20 is composed of a pair of upper and lower molds 21 and 22, and performs a plurality of processing steps sequentially along the material flow direction. In this embodiment, the case of a three-stage progressive die is shown, and a first step punching die 23A, a second step punching die 23B, and a third step punching die 23C, which respectively process different shapes, are sequentially arranged at equally spaced die pitches. Place at P1.

  The first step punching die 23A is provided with a first step punch 23A1 and a first step die 23A2 corresponding to the top and bottom, and the second step punching die 23B is a second step corresponding to the top and bottom as in the first step. The punch 23B1 and the second-stage die 23B2 are provided, and the third-stage punching die 23C is provided with the third-stage punch 23C1 and the third-stage die 23C2 corresponding to the upper and lower sides in the same manner as the first and second stages. Yes.

  In the material F, material position detection holes F1 are formed at an equal interval position detection pitch P2, and the position detection pitch P2 and the first step punching die 23A, the second step punching die 23B, and the third step punching die 23C are formed. The mold pitch P1 is set to the same length. The material position detection hole F1 is a hole for position detection (diameter of about 0.2 to 0.3 mm) formed together in a process of performing an important process for integral molding such as caulking burring. If there is a hole available for measurement in the processed hole, it is also possible to use it.

  The punch of each stage is configured to reciprocate up and down, and the die of each stage of the punch is fixed. When the material is continuously processed, the material P is fed from the first step punching die 23A side of the progressive die, and the processing P2 is performed by the first step punch 23A1 of the first step punching die 23A. Next, the material P is fed by the material feeding device 10 by the position detection pitch P2, and the processing P3 is performed by the second stage punch 23B1 of the second stage punching die 23B, and further, the material is fed by the material feeding apparatus 10 by the position detection pitch P2. P is sent and processing P3 is performed by the third step punch 23C1 of the third step punching die 23C.

  The light source means 30 is embedded in one mold 21 and the position detecting means 31 is embedded in the other mold 22 one step before the third step punching die 23C in the final process. The machining position is set at a machining position H1 away from the arrangement position of the stepping die 23C.

  The light source means 30 includes a light source 30A and a parallel light conversion lens 30B, and the light emitted from the light source 30A is converted into parallel light by the parallel light conversion lens 30B. The position detection means 31 detects the amount of feed deviation from the reference position based on the projection position of the passing light through the material position detection hole F1.

  That is, the light source means 30 emits parallel light having a cross-sectional area larger than the cross-sectional area of the material position detecting hole F1, and the position detecting means 31 includes a projection position of the parallel light passing light through the material position detecting hole F1, and By comparing with a preset reference position, a difference in projection position with respect to the reference position can be easily and accurately detected as a feed shift amount.

  In this embodiment, the position detection means 31 has, for example, a one-dimensional PSD 31A, and as shown in FIG. 3, the light that has passed through the material position detection hole F1 in the projected light is detected by the one-dimensional PSD 31A. A bright spot O1 is formed on the element. The detection element of the one-dimensional PSD 31A outputs a signal corresponding to the position of the bright spot, converts it into a position signal by the signal processing circuit 31B, detects the amount of deviation of the bright spot O1 from the reference position, and sends it to the control means 40. .

  The control means 40 includes a CPU, a RAM, a ROM, and the like, and controls to send the material F by correcting the set feed amount of the material F based on the feed deviation amount based on the position signal from the signal processing circuit 31B.

  In this embodiment, as shown in FIG. 3A, the reference position O set in advance and the bright spot O1 on the detection element are compared, and if they match, the feed amount of the material F is increased or decreased. As shown in FIG. 3B, the reference position O set in advance is compared with the bright spots O2 and O3 on the detection element, and if they do not match, the feed amount of the material F Is controlled to increase W1 or decrease W2.

  This control means 40 controls the feed rate of the material F by outputting a drive pulse to the stepping motor 13 via the drive circuit 41 so that the feed rate of the material F is increased W1 or decreased W2. The amount of rotation of the pair of delivery rolls 12 is controlled via the control unit.

  In this embodiment, since the feed amount of the material F is detected and controlled one step before the final step, no stress is applied to the material F due to processing or the like from the detection to the feed of the material F. The movement of the material F in the final process can reflect the feed amount on the material feeder side as it is, and the workpiece of the material can be aligned at the assumed position.

  As described above, this material position detection control device includes a pair of molds 21 and 22 that perform a plurality of processes while intermittently feeding the material F at a constant interval, and the material F passes through the material position detection hole F1. The material F to be processed in the vicinity of the most important final process is detected because the amount of feed deviation from the reference position is detected based on the projection position of light, and the material F is fed by correcting the feed amount set based on the amount of feed deviation. By detecting the position and controlling the feed amount of the material F, it is possible to satisfactorily align the plurality of parts at the time of integral molding. Further, it is possible to perform alignment in a process in which the pilot pin cannot be used for controlling the feed position of the material F.

  The present invention is particularly applicable to a material position detection control device that controls the relative position between a material to be processed and a die or other processed material to be combined in a single-press molding machine using a multi-step combination. By detecting the position of the material to be processed in the vicinity of the most important final process and controlling the feed amount of the material, it is possible to satisfactorily align the plurality of parts at the time of integral molding.

DESCRIPTION OF SYMBOLS 10 Material feeder 11 Feed axis | shaft 12 Feed roll 13 Stepping motor 20 Press machine 21,22 Die 23A 1st stepping die 23B 2nd stepping die 23C 3rd stepping die 30 Light source means 30A Light source 30B Parallel light conversion lens 31 Position detecting means 31A One-dimensional PSD
31B Signal processing circuit 40 Control means 41 Drive circuit F Material

Claims (3)

Provided with a pair of molds that process multiple processes while intermittently feeding materials at regular intervals,
The material is formed with a material position detection hole,
Light source means for emitting parallel light embedded in the one mold,
Position detecting means for detecting a feed deviation amount from a reference position based on a projection position of light passing through the material position detecting hole embedded in the other mold;
A material position detection control device comprising: a control means for feeding the material by correcting the feed amount set for the material based on the feed deviation amount. The light source means irradiates parallel light having a cross-sectional area larger than the cross-sectional area of the material position detecting hole,
The position detection means compares the projection position of the passage light of the parallel light by the material position detection hole and a preset reference position,
2. The material position detection control device according to claim 1, wherein a difference in the projection position with respect to the reference position is detected as a feed shift amount. The material position detection control device according to claim 1 or 2, wherein the feed amount of the material is detected and controlled one step before the final step.