JP2009034716A - Blank inflow measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blank inflow measuring device capable of suppressing generation of a measurement error and reduction in the service life of a measuring sensor, which are caused by vibration in pressing, and capable of correctly measuring the inflow of a blank even if the shape of a product varies. <P>SOLUTION: The blank inflow measuring device comprises a sensor 6 for measuring displacement of an edge part 3a of a blank 3 to be pressed, and measures the inflow of the blank 3 based on an electric signal from the sensor 6. In the blank inflow measuring device, the sensor 6 is positioned and fixed to a displacement measuring position through a positioning jig 7. The positioning jig 7 is provided with a jig base 7a, which is fixed to the displacement measuring position, and a sensor fixing plate 7c, to which the sensor 6 is fixed and which is fixed to the jig base 7a through a buffer plate 7b. The sensor fixing plate 7c is made tiltable by pressing force of the sensor fixing plate 7c to the side of the jig base 7a, and the positioning jig 7 has a vibration absorbing function. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a material inflow amount measuring apparatus for measuring an inflow amount of a material during press working such as drawing.

  When a metal plate-like material is pressed by a die, particularly drawn, the draw bead suppresses an excessive inflow of the material that leads to the generation of wrinkles. In this case, the control of the wrinkle pressure is important. That is, if the wrinkle pressing pressure is insufficient, the generation of wrinkles cannot be prevented, and if it is too large, breakage occurs. Thus, the wrinkle holding pressure, in other words, the inflow amount of the material greatly affects the quality of processing, particularly the quality of the surface.

Conventionally, for example, techniques listed in Patent Documents 1 and 2 have been proposed in order to improve processing quality in press working.
Patent Document 1 proposes a technique for measuring the punch movement amount and the material inflow amount during press working and controlling the molding speed so that the material inflow amount with respect to the punch movement amount falls within a predetermined range. Patent Document 2 proposes a technique for obtaining a material inflow rate based on the measurement of the material inflow amount and controlling the wrinkle holding pressure so that the material inflow rate is within a predetermined range.

JP 2005-125355 A JP 2003-313141 A

  However, none of the above prior arts considers vibration during press working, and the measurement error of the material inflow is likely to occur due to vibration during press working, and the life of a sensor for measurement or the like is likely to be reduced. It was. Further, when the product shape (the shape after pressing the material) is different, it is difficult to correctly measure the material inflow amount according to the product shape, and improvement of this point has been a problem.

  The present invention has been made in order to achieve the above-described problems, and can suppress the occurrence of measurement errors due to vibration during processing and the decrease in the service life of measurement sensors and the like, and even when the product shape is different. An object of the present invention is to provide a material inflow measuring device capable of correctly measuring the amount of inflow.

The said subject is solved by making the raw material inflow amount measuring apparatus the structure of each following aspect.
As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the present invention, and the technical features described in this specification and combinations thereof should not be construed as being limited to those described in the following sections. . In addition, when a plurality of items are described in one section, it is not always necessary to employ the plurality of items together, and it is also possible to take out only a part of the items and employ them.

  Of the following items, (1) is in claim 1, (2) is in claim 2, (3) is in claim 3, (4) is in claim 4, (5) The terms correspond to claim 5 respectively.

(1) In a material inflow measuring device that includes a sensor for measuring the displacement of an end of a material to be pressed and measures the inflow of the material based on an electrical signal from the sensor, the sensor is sensor-positioned. The sensor positioning jig is fixed to a displacement measurement position for measuring the displacement via a jig, the jig substrate fixed to the displacement measurement position, and the sensor is fixed, and the sensor is fixed via a buffer. A material inflow measuring device, comprising: a sensor fixing plate fixed to a jig substrate; and the sensor fixing plate can be tilted by a pressing force of the sensor fixing plate toward the jig substrate. .
The sensor may be either a contact type or a non-contact type. A non-contact displacement sensor, particularly a laser displacement sensor, is suitable as a sensor because it does not apply any load to the material when measuring the displacement of the material edge.
If the sensor fixing plate can be tilted, the direction of the sensor can be adjusted to the optimal direction for measuring the displacement of the material edge, and the product shape (the shape after pressing the material) will be different. Even if they are different, it is possible to correctly measure the material inflow by adjusting the direction of the sensor in accordance with the difference.
The shock absorber may be any one having a vibration absorption or relaxation function and being deformable. For example, in addition to the elastic body, a flexible member such as a bag may contain a clay-like substance, a gel-like substance, a liquid, or the like.
(2) The material inflow measurement according to (1), further comprising: a fastening unit that fastens and fixes the jig substrate to the displacement measurement position, wherein the pressing force is generated by a fastening force of the fastening unit. apparatus.
Since the sensor is fixed to the sensor fixing plate, and the sensor fixing plate is fixed to the jig substrate, fixing the jig substrate tightly fixes the sensor fixing plate and the sensor, and consequently fixes the sensor positioning jig. It means to do.
The tightening means may be any fixing means that can fix the jig substrate to the displacement measurement position and presses the sensor fixing plate toward the jig substrate in the fixed state. For example, a means such as a vise that clamps the sensor fixing plate and the jig substrate from outside may be used.
When a tightening means is provided, and the buffer body is a flexible member such as a bag containing a clay-like substance, gel-like material, liquid, or the like, the buffer body is connected to the sensor fixing plate. It arrange | positions so that it may not interfere with a fastening means between tool plates.
(3) In the item (2), the fastening means includes an anchor bolt that penetrates the sensor fixing plate, the buffer body, and the jig substrate, and a nut that is screwed to the anchor bolt. The material inflow measuring device described.
(4) Item (2) or (3), wherein the displacement measurement position is set in a cushion ring of a press working apparatus, and the jig substrate is fastened and fixed to the cushion ring by the fastening means. The material inflow measuring device described in 1.
(5) The material inflow measuring device according to (1), (2), (3) or (4), wherein the buffer is an elastic body.

  According to the present invention, in the measurement of the amount of material inflow during drawing processing, it is possible to suppress the occurrence of measurement errors due to vibration during processing and the decrease in the life of measurement sensors, etc., and the inflow of materials even when the product shape is different. It is possible to provide a material inflow measuring device capable of correctly measuring the amount.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol shows the same or an equivalent part between each figure.
First, the outline of the press drawing process will be described with reference to FIG. 1. In the figure, 1 and 2 are molds (press molds) used for processing, 1 is an upper mold having a punch forming surface, and 2 is a die. A lower mold having a molding surface. The material 3 to be drawn is put into both molds 1 and 2 and on the lower mold 2 before processing. After the material 3 is charged, the upper die 1 is lowered, and the material 3 is subjected to drawing processing according to the shapes of the upper and lower dies 1 and 2. The cushion ring 4 applies a reaction force upward during processing. Actually, a draw bead is provided in the upper mold 1 and the cushion ring 4, but is omitted in FIG. In addition, the arrow a in the figure indicates the pressurizing direction during processing.

  FIG. 2 is an overall configuration diagram of an embodiment of a material inflow measuring device according to the present invention. Here, a case where the material inflow is measured in the press drawing shown in FIG. 1 is illustrated. FIG. 3 is a plan view schematically showing a state in which the upper mold 1 is removed from FIG. Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 and 3.

The material inflow measuring device according to the present embodiment mainly includes a sensor 6, a sensor positioning jig 7, and an arithmetic processing device 8.
The sensor 6 is a sensor that measures the displacement of the end portion 3a when a material 3 such as an iron plate drawn by a mold (upper and lower molds 1 and 2) flows in. Here, a laser displacement sensor which is a non-contact displacement sensor is used as the sensor 6. According to a non-contact type displacement sensor such as a laser displacement sensor, no load is applied to the material 3 at the time of measuring the displacement of the material end 3a, and processing is not affected.
The sensor 6 receives the reflected light of the laser beam 6a emitted to the material end 3a, obtains the position (distance) of the material end 3a, obtains the displacement of the end 3a, and outputs the result as an electric signal. To do.

The sensor positioning jig 7 is a jig for positioning and fixing the sensor 6 on a position (displacement measurement position) for measuring the displacement of the material end 3a, in the illustrated example, on the cushion ring 4.
The sensor positioning jig 7 is arranged so that vibrations of the cushion ring 4 and the like are not directly transmitted to the sensor 6 during processing, that is, when measuring the displacement of the material end 3a (when the material flows in). Can be adjusted in an optimum direction for measuring the displacement of the material end 3a.
The reason why the sensor positioning jig 7 is configured not to directly transmit the vibration of the cushion ring 4 or the like to the sensor 6 at the time of processing is to suppress the occurrence of a displacement measurement error due to the vibration at the time of processing or the decrease in the life of the sensor 6. is there. In addition, the sensor 6 is configured so that the orientation of the sensor 6 can be adjusted in an optimum direction for measuring the displacement of the material end 3a. The product shape (the shape after the material 3 is pressed) is different, in other words, the material inflow direction is different. Even in such a case, the direction of the sensor 6 is adjusted according to the adjustment to enable the correct measurement of the material inflow amount.

FIG. 4 is an enlarged perspective view showing a configuration example of such a sensor positioning jig 7 together with the sensor 6.
As shown in the figure, in this embodiment, the sensor positioning jig 7 includes a jig substrate 7a, a buffer plate 7b, and a sensor fixing plate 7c.
Here, the jig substrate 7a is fixed on the cushion ring 4, and the sensor fixing plate 7c is fixed to the jig substrate 7a via the buffer plate 7b on the lower surface side with the sensor 6 fixed to the upper surface. The buffer plate 7b is formed of a buffer body made of an elastic body such as a urethane material or a rubber material.
In the illustrated example, each of the plates 7 a to 7 c has a rectangular shape whose outer dimensions are substantially uniform, and is laminated integrally to form a base plate-like sensor positioning jig 7.

As described above, the sensor positioning jig 7 is placed on the cushion ring 4 (displacement measurement position) by fixing the jig substrate 7a on the cushion ring 4 and fixing the sensor fixing plate 7c to the jig substrate 7a. Positioning is fixed. In the example shown in the figure, these fixings are made up of four tips whose front ends pass through the four corners of the sensor positioning jig 7 (sensor fixing plate 7c, buffer plate 7b and jig substrate 7a) and are connected to the cushion ring 4 by press fitting or the like. This is performed by the anchor bolt 7d.
In FIG. 4, 7e is a nut screwed to the anchor bolt 7d, and constitutes a fastening means for fastening and fixing the jig substrate 7a (sensor positioning jig 7) to the cushion ring 4 together with the anchor bolt 7d.
The nut 7e can generate a pressing force toward the jig substrate 7a with respect to the sensor fixing plate 7c by tightening (force) to tilt the sensor fixing plate 7c.
Therefore, the tightening degree of each nut 7e is adjusted, that is, using the difference in physical property value (longitudinal elastic modulus) between the sensor fixing plate 7c and the buffer plate 7b, and tightening the buffer plate 7b while intentionally bending it. Thus, the orientation of the sensor 6 fixed on the sensor fixing plate 7c can be adjusted. That is, the emission direction of the laser beam 6a can be adjusted to an optimum direction for measuring the displacement of the material end 3a according to the product shape. For example, by adjusting the tightening of a pair of nuts 7e and 7e located on the front side (front side in the drawing) of the sensor positioning jig 7, the emission direction of the laser light 6a can be adjusted to the upper and lower sides. According to this, even when the product shape (material inflow direction) is different, the material inflow amount can be correctly measured.

The reason that the sensor fixing plate 7c can be inclined by tightening the nut 7e and the anchor bolt 7d is that the buffer plate 7b is interposed between the jig substrate 7a and the sensor fixing plate 7c.
According to such an interposition structure of the buffer plate 7b, vibrations of the cushion ring 4 and the like generated during processing, that is, when measuring the displacement of the material end 3a are not directly transmitted to the sensor 6 on the sensor positioning jig 7. That is, the vibration at the time of processing is absorbed by the buffer plate 7b, the displacement measurement of the sensor 6 is stabilized, and the lifetime reduction of the sensor 6 due to vibration is suppressed.

  After the anchor bolt 7d is press-fitted into the cushion ring 4, the setting of the displacement measuring direction of the material end portion 3a of the sensor 6 (positioning in the laser beam emitting direction of the sensor 6) is the first (lower) nut 7e. It is done by tightening. If a double nut structure is used to tighten the second (upper) nut 7e after setting the displacement measurement direction, the nut 7e and the anchor bolt 7d are less likely to loosen, preventing the sensor 6 from being displaced and stable displacement. Enable measurement.

  The arithmetic processing unit 8 performs calculations such as various analyzes using the displacement (data) of the material end 3a sent from the sensor 6 and the movement (stroke) data of the cushion ring 4 sent from the press facility. Device. In the present embodiment, a personal computer equipped with necessary calculation and processing programs is used as the calculation processing device 8.

The recorder 9 is a recording means for recording the inflow amount of the material 3 calculated by the arithmetic processing unit 8 and the movement amount of the cushion ring 4 from the press facility, and also records the calculation results of various analyzes of the arithmetic processing unit 8. Is possible.
The monitor display 10 is connected to the arithmetic processing device 8 and is a display means for displaying the inflow amount of the material 3 (inflow amount of the material) taken in the arithmetic processing device 8 and the movement amount of the cushion ring 4. Calculation results such as analysis can also be displayed.

In addition, when the electrical signal from the sensor 6 or the press equipment (the signal representing the displacement of the material end 3a and the movement of the cushion ring) is an analog signal, it is given to the arithmetic processing unit 8 after A / D conversion, The inflow amount of the material 3 and the movement amount of the cushion ring 4 are configured so that the arithmetic processing unit 8 obtains them by calculation.
In this embodiment, the arithmetic processing unit 8 can accumulate and record the inflow amount for each material 3 to be continuously processed in the recorder 9 and can display this on the monitor display 10 when desired.
The arithmetic processing unit 8 can also display on the monitor display 10 a graph in which the movement amount at the time of processing the cushion ring 4 is taken on the horizontal axis and the inflow amount of the material 3 is taken on the vertical axis.
Further, in the present embodiment, the arithmetic processing unit 8 is configured to output an abnormal signal S1 when the calculation result value of the material inflow amount exceeds a predetermined upper limit value or is lower than a lower limit value. The abnormal signal S1 is, for example, a control signal for operating a notifying means for notifying that the material inflow amount is not within the upper and lower limit values (abnormal situation), or for stopping a processing operation of a press facility (press processing apparatus). Used as

Next, the measurement operation of the material inflow amount from the start to the completion of press drawing according to the present embodiment shown in FIG. 2 will be described with reference to FIGS.
Now, the processing operation is started in the press facility, and when the upper mold 1 is lowered as shown by the arrow A and contacts the cushion ring 4 through the material 3, the press facility informs the sensor 6 of the start of the press processing and performs the measurement operation. That is, the displacement measurement of the material edge 3a is started (see steps 601 and 602 in FIG. 6).

When the upper die 1 starts to further lower while pressurizing the cushion ring 4, drawing processing is started on the material 3 (see step 603), and the material 3 moves as shown by an arrow B in accordance with the deformation. That is, it flows in. During this time, the sensor 6 continues the measurement operation, that is, continuously emits the laser beam 6a toward the material end 3a and receives the reflected light from the material end 3a, and calculates the measurement result (output signal). This is given to the processing device 8.
When the drawing process is completed in Step 604, the upper mold 1 is raised in Step 604, and the pressure applied to the cushion ring 4 is released (released). Then, the press facility informs the sensor 6 of the completion of the press work and ends the measuring operation of the sensor 6 (see step 605).
When the measurement operation is finished (see step 606), the sensor 6 is ready for inflow measurement in the next processing.
The arithmetic processing unit 8 takes in an electrical signal from the sensor 6 from the start to the end (steps 603 to 604) of the drawing process, calculates the inflow amount of the material 3, and displays it on the monitor display 10.

Here, the sensor 6 is positioned and fixed on the cushion ring 4 via a sensor positioning jig 7. As shown in FIG. 4, the sensor positioning jig 7 is fixed on the sensor fixing plate 7c fixed on the jig substrate 7a fixed on the cushion ring 4 via the buffer plate 7b. Has been. The sensor fixing plate 7c can be tilted by tightening the nut 7e, and the direction of the sensor 6 fixed on the sensor fixing plate 7c, that is, the emitting direction of the laser beam 6a can be adjusted.
Accordingly, during processing, that is, when the displacement of the material end 3a is measured, the vibration of the cushion ring 4 or the like is not directly transmitted to the sensor 6 on the sensor positioning jig 7 (buffered and absorbed by the buffer plate 7b), and measurement by vibration is performed. It is possible to suppress the occurrence of errors and the life reduction of the sensor 6. Further, the emission direction of the laser beam 6a is adjusted to the optimum direction for measuring the displacement of the material end 3a according to the product shape (material inflow direction), that is, the direction in which the laser beam 6a is emitted correctly toward the material end 3a. It is possible to correctly measure the amount of material inflow in processing of different product shapes.

In the present embodiment, the arithmetic processing unit 8 displays the movement amount (stroke) of the cushion ring 4 in addition to the material inflow amount on the monitor display 10. FIG. 7 shows a display example of the graph on the monitor display 10. Show.
In FIG. 7, the horizontal axis represents the time from the start to the completion of machining, and the vertical axis represents the material inflow amount, the stroke of the cushion ring 4, and the like. Graph I represents a change in the material inflow of a non-processed product, and Graph II represents a change in the material inflow of a process-defective product. Graph III represents the slide stroke, and graph IV represents the stroke of the cushion ring 4.
A region α1 surrounded by a broken line is a region used for identification of non-defective products and defective products.

  The arithmetic processing device 8 automatically notifies of a defective processing product as shown in the graph II, or stops the press processing device. Specifically, the arithmetic processing unit 8 outputs an abnormal signal S1 when the calculation result value of the inflow amount of the material 3 deviates from a predetermined upper and lower limit range. If this abnormal signal S1 is used as a control signal for operating the notifying means for notifying an abnormal situation or for stopping the processing operation of the press equipment, when a defective product is generated, it is automatically notified. The press facility (press processing device) can be stopped, and a defective product can be prevented from flowing into a subsequent process such as welding or painting.

FIG. 8 shows the progress of the above press working and material inflow measurement.
In FIG. 8, 81 is a fixed part of the press facility, 82 is the movable part, 83 is a pressurizing device necessary for drawing, and 84 is a laser sensor. In FIG. 8, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
In FIG. 8 (a), a press die and a cushion ring 4 comprising an upper die 1 having a punch forming surface and a lower die 2 having a die forming surface are installed in a press facility (fixed portion 81, movable portion 82). .
The pressurizing device 83 necessary for the drawing is an important element that captures the behavior of material inflow during material forming and the process of material inflow, but here the configuration is arbitrary.
In addition, outputting the slide stroke position by the pressing equipment movable unit 82 is an important element for grasping the material inflow process, but the configuration is arbitrary here.
The means for detecting the slide stroke position may be a laser sensor 84 provided outside the press facility.
8A, the material 3 is set in the press mold (between the upper mold 1, the lower mold 2, and the cushion ring 4).

In FIG.8 (b), the press installation movable part 82 descend | falls, and press processing is performed through FIG.8 (c) and FIG.8 (d) in order after that.
During the press working, the material 3 flows into the press die as the molding progresses.
The inflow process of the material 3 is observed by a sensor (non-contact type displacement sensor, here a laser type displacement sensor) 6 on the sensor positioning jig 7. That is, the sensor 6 measures the displacement of the material end 3 a during the inflow of the material 3.
As described above, the sensor positioning jig 7 is capable of absorbing vibrations generated during press working and being always stable by the interposing structure of the buffer plate 7b shown in FIG. 4 and the fastening means including the anchor bolt 7d and the nut 7e. It has the functions of holding the measurement position for measurement (observation) and optimizing the displacement measurement direction according to the material inflow direction.
As a result, the sensor 6 does not cause measurement errors due to vibrations and does not cause a decrease in life, and can perform inflow amount measurement more accurately than in the prior art even in processing in which the material inflow direction (product shape) is different. .
The result of the displacement measurement of the material edge 3a by the sensor 6 is sent to the arithmetic processing unit 8 shown in FIG. 2 for calculation, and displayed on the monitor display 10 as shown in graph I or graph II in FIG. .

In the above-described embodiment, an example in which a laser displacement sensor is used as a sensor for measuring the displacement of the end of the material has been described. However, other sensors such as a camera or a linear sensor may be used.
An example using a camera as a sensor is shown in FIG. 9, and an example using a linear sensor is shown in FIG.
In the example shown in FIG. 9, the wire rope 92 with the marker 91 is detachably connected to the end 3 a of the material 3, and the displacement of the material end 3 a at the time of processing (at the time of material inflow) is changed. The camera (sensor) 93 takes a picture. Then, an output signal of the camera 93 is given to the image processing device 94, and the marker movement amount is obtained as a material inflow amount by the image processing device 94 and displayed on the monitor display 10.
In the figure, 95 is a pulley and 96 is a weight. The weight 96 is a wire rope tensioning means for holding the wire rope 92 in a constantly tensioned state and suppressing an impact force generated during processing. It is attached to the end. Of course, the weight 96 does not reach the position where the material 3 is pulled and moved, but the wire rope 92 is stretched.

  In such an apparatus, the camera 93 is positioned and fixed to, for example, the upper mold 1 via the sensor positioning jig 7. According to this, by adjusting the inclination of the sensor positioning jig 7 and adjusting the orientation of the camera 93 (camera light receiving shaft 93a), the material inflow amount can be correctly measured even when the product shape (material inflow direction) is different. Yes. If the camera light receiving shaft 93a is perpendicular to the movement direction of the marker 91, it is easier to accurately measure the amount of movement of the marker. However, if the inclination of the sensor positioning jig 7 can be adjusted, the product shape (material inflow direction) Even if they are different, the camera light receiving shaft 93a can always be directed perpendicular to the moving direction of the marker 91.

FIG. 9 shows an example in which the material 3 moves in the horizontal direction as indicated by an arrow B (the material inflow direction is horizontal), and the marker 91 also moves in the horizontal direction. It has been adjusted to the state. When the product shape (material inflow direction) changes and the material 3 tilts, for example, tilts upward to the right in the figure, the sensor positioning jig 7 is tilted and the camera light receiving shaft 93a is moved with respect to the direction of movement of the marker 91. Turn vertically.
In any case, according to the sensor positioning jig 7, it is possible to optimize the displacement measurement direction according to the material inflow direction for the camera 93 and to absorb the vibration generated during the press working. It is possible to extend the life and maintain the measurement position for stable measurement at all times.

In the example shown in FIG. 10, the detection part 102a of the linear sensor 102 is connected to the end part 3a of the raw material 3 via a moving member 101 such as a leaf spring or a wire rope, and the end part of the raw material at the time of processing (when the raw material flows in). The displacement of 3a is detected as advancing / retreating of the linear sensor detector 102a, in this case, advancing, and the amount of advance of the linear sensor detector 102a is determined as the material inflow by the arithmetic processing unit 8 and displayed on the monitor display 10.
The moving member 101 is engaged or attached to the linear sensor detection unit 102a and / or the material end 3a so as not to drop out between the linear sensor detection unit 102a and the material end 3a. It is supposed to be detachable. When the moving member 101 is a leaf spring, the material end portion 3a side may be simply brought into contact.
In the illustrated example, the linear sensor 102 is an air cylinder with a linear sensor in which a linear sensor is incorporated in an air cylinder, and the moving member 101 is a leaf spring.
In this case, the linear sensor 102 is connected to the intake / exhaust port of the press facility, and the moving member (leaf spring) provided to the linear sensor detection unit 102a at least after the start of processing (at the start of inflow of the material 3). ) By the pressing force toward the 101 side, intake / exhaust control is performed so that the moving member 101 is held in a state in which the distal end thereof is in contact with the material end surface 3a. As a result, the moving member 101 can move following the diaphragm inflow of the material 3 without the tip of the moving member 101 being detached from the material end surface 3a. The linear sensor 102 outputs the amount of movement of the detection unit 102a, in other words, the displacement of the material end 3a as an electrical signal.

  In such an apparatus, the linear sensor 102 is positioned and fixed on the displacement measurement position, for example, the cushion ring 4 via the sensor positioning jig 7. According to this, by adjusting the inclination of the sensor positioning jig 7 and adjusting the direction of the linear sensor 102, the material inflow amount can be correctly measured even when the product shape (material inflow direction) is different.

FIG. 10 shows an example in which the material 3 moves in the horizontal direction as indicated by the arrow B (the material inflow direction is horizontal), and the linear sensor detection unit 102a and the moving member 101 also move in the horizontal direction. The sensor positioning jig 7 is adjusted to a horizontal state. When the product shape (the material inflow direction) changes and the material 3 is inclined, for example, tilted upward to the right in the figure, the sensor positioning jig 7 is adjusted to adjust the linear sensor detector 102a and the moving member 101 of the material 3. Turn in the same direction as the tilt direction.
In any case, according to the sensor positioning jig 7, the linear sensor 102 can be optimized in the displacement measurement direction in accordance with the material inflow direction, and can absorb vibration generated during press working. It is possible to extend the life and maintain the measurement position for stable measurement at all times.

  If the sensor has an arithmetic processing function and can output not only the displacement of the material end but also the material inflow amount from the sensor, the arithmetic processing device can be omitted for the calculation of the material inflow amount.

It is a schematic sectional drawing for demonstrating the outline | summary of press drawing. 1 is an overall configuration diagram of an embodiment of a material inflow measuring device according to the present invention. It is a top view which shows the outline of the state which removed the upper mold | type in FIG. It is a perspective view which expands and shows the structural example of the sensor positioning jig | tool in FIG. 2 with a sensor. It is a principal part block diagram for operation | movement description of embodiment shown in FIG. It is also a time chart. It is a figure which shows the example of a display of the graph by the monitor display in FIG. It is a figure which shows collectively the progress process of press work and raw material inflow amount measurement. It is a whole block diagram which shows the example which replaced with the sensor (laser type displacement sensor) in FIG. 2, and used the camera. It is the whole block diagram which similarly shows the example using a linear sensor.

Explanation of symbols

1: Upper mold, 2: Lower mold, 3: Material, 3a: Material edge, 4: Cushion ring, 6: Sensor (laser displacement sensor), 6a: Laser beam, 7: Sensor positioning jig, 7a: Osamu 7b: buffer plate (buffer body), 7c: sensor fixing plate, 7d: anchor bolt (tightening means), 7e: nut (tightening means).

Claims (5)

In the material inflow measuring device comprising a sensor for measuring the displacement of the end of the material to be pressed, and measuring the inflow of the material based on the electrical signal from the sensor,
The sensor is positioned and fixed at a displacement measurement position for measuring the displacement via a sensor positioning jig,
The sensor positioning jig includes a jig substrate fixed at the displacement measurement position, and a sensor fixing plate to which the sensor is fixed and fixed to the jig substrate via a buffer. A material inflow measuring device, wherein the sensor fixing plate is tiltable by a pressing force toward the jig substrate.   2. The material inflow amount measuring apparatus according to claim 1, further comprising: a fastening unit that fastens and fixes the jig substrate to the displacement measurement position, and the pressing force is generated by a fastening force of the fastening unit.   3. The material inflow according to claim 2, wherein the tightening means includes an anchor bolt that penetrates the sensor fixing plate, the buffer body, and the jig substrate, and a nut that is screwed to the anchor bolt. Quantity measuring device.   4. The material inflow measurement according to claim 2, wherein the displacement measurement position is set in a cushion ring of a press working apparatus, and the jig substrate is fastened and fixed to the cushion ring by the fastening means. apparatus. The material inflow measuring device according to claim 1, 2, 3, or 4, wherein the buffer is an elastic body.

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