JP6829460B2 - Inspection equipment for squeezing machines - Google Patents

Description

The present invention relates to an inspection device for a pressure maker that inspects the presence or absence of foreign matter or the like that may remain inside the through hole when a product having a through hole is manufactured by the pressure maker.

There is known a multi-process squeezing machine that has a plurality of squeezing process sections for pressing a workpiece with a punch and a die to perform molding. In the multi-process heading machine, the work is sequentially transported from the upstream side to the downstream side by a transfer device to proceed with the forming process. Here, a product having through holes may be manufactured by performing a hole forming process on the work. In this case, a defect that the piercing residue generated by the hole forming process remains inside the through hole may occur very rarely. Patent Document 1 discloses an example of a technique for inspecting the presence or absence of foreign matter in a hole of a product.

In the method of inspecting a cast hole in Patent Document 1, an inspection rod that can slide in the axial direction is attached to a movable mold of a trimming press, and the tip of the inspection rod is cast into a cast product while trimming is performed by moving the movable mold. Insert it into the punch hole. Then, from the displacement amount of the inspection rod, it is inspected whether or not there is a foreign substance inside the cast hole. According to this, defective products can be detected before the cast product is completed as a product, so that loss can be minimized and minimized.

Japanese Unexamined Patent Publication No. 10-328806

By the way, if the piercing residue remains in the through hole of the product, there is a risk of a secondary disaster in which the heat treatment machine or the assembling machine in the subsequent process using this product breaks down. Furthermore, the machine incorporating this product may become defective, resulting in a large loss. For this reason, we have traditionally relied on human-wave tactics to inspect all products for foreign matter that may remain inside the through-holes. However, 100% human-wave tactical testing was significantly inefficient. In addition, the heading machine generally manufactures 100 or more products at high speed per minute, and automation of inspection has not been realized.

With respect to this problem, the technique of Patent Document 1 cannot be used due to the following two points as obstacles. First, since the technique of Patent Document 1 is performed in conjunction with trimming after the casting process, it is not possible to realize high-speed inspection corresponding to high-speed manufacturing of the heading machine. Secondly, the technique of Patent Document 1 is intended for a dead end-shaped cast hole, and cannot be applied to a through hole. Therefore, there is a need for an inspection device for a heading machine that can automatically and at high speed inspect the presence or absence of piercing residue that may remain inside the through hole of the product.

Further, in the pressure forming machine, there is a possibility that the work is conveyed without performing the hole forming process, and there is a possibility that burrs are generated inside the through holes. Therefore, it is preferable that the inspection device for a heading machine can have a function of detecting an unprocessed workpiece and a function of inspecting the presence or absence of burrs in addition to the function of inspecting the presence or absence of piercing residue.

The present invention has been made in view of the above-mentioned problems of the background technology, and is provided in a squeezing machine for manufacturing a product having a through hole, and can automatically inspect the presence or absence of foreign matter remaining inside the through hole. The problem to be solved is to provide an inspection device for manufacturing.

The inspection device for a pressure maker of the present invention is provided in a pressure maker that manufactures a product having a through hole by performing a hole forming process on a work using a punch and a die, and a foreign substance that may remain inside the through hole. An inspection device for a pressure maker that inspects the presence or absence of a detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product, and the detection pin. wherein a driving unit for driving the insertion and exit of the through hole of, and a foreign object detection section for detecting that said through hole said detection pin inserted into has pushed the foreign object, the foreign object detection section A metal detection plate that is held and pushed on the other side of the product and is pushed by the foreign matter to move in the insertion direction of the detection pin, a standby conductor that the moving detection plate contacts, and It has a detection unit on the other side that detects the foreign matter by the state of electrical conduction between the detection plate and the standby conductor.

Further, the inspection device for the pressure maker is provided in the pressure maker that manufactures a product having a through hole by performing a hole forming process on the work using a punch and a die, and the presence or absence of foreign matter that may remain inside the through hole. A detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product, and the detection pin. A drive unit that drives insertion and exit into the through hole, and a foreign matter detection unit that detects that the detection pin inserted in the through hole pushes the foreign matter or comes into contact with the foreign matter are provided. The foreign matter detection unit may be a continuity detection unit that detects that the metal detection pin comes into contact with the metal foreign matter and is electrically conductive.

Further, the inspection device for the heading machine is provided in the heading machine that manufactures a product having a through hole by performing a hole forming process on the work using a punch and a die, and the presence or absence of foreign matter that may remain inside the through hole. A detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product, and the detection pin. A drive unit that drives insertion and exit into the through hole, and a foreign matter detection unit that detects that the detection pin inserted in the through hole pushes the foreign matter or comes into contact with the foreign matter are provided. The drive unit includes a swing arm having a fulcrum supported so as to be swingable, a pair of drive points, and an action point for driving the detection pin, and a pair of air cylinders that alternately drive the pair of drive points. And a drive control unit that controls the pair of the air cylinders based on the execution cycle of the hole forming process.

Further, it is preferable that the length of the working side connecting the fulcrum and the driving point is larger than the length of the driving side connecting the fulcrum and the driving point of the swing arm.

Further, a stroke detecting unit may be further provided which monitors the moving stroke amount of the detection pin and detects the shortage of the moving stroke amount caused by the foreign matter.

Further, it is preferable to further include a product transporting section for carrying in the product from the heading process section composed of the punch and the die and carrying out the product for which the inspection has been completed.

Further, the detection pin may have a hollow tubular shape.

Further, the foreign matter is at least the piercing residue removed from the work by the hole forming process, the molding target portion which is not subjected to the hole forming process and remains bonded to the work, and the burr generated by the hole forming process. It is preferable to include one.

Further, the squeezing machine is a multi-process squeezing machine including a plurality of sets of the punches and the dies, and an inspection device for the squeezing machine may be provided interchangeably with any set of the punches and the dies. ..

In the inspection device for a pressure machine of the present invention, a detection pin can be inserted into a through hole from one side of a product by a drive unit, and the presence or absence of foreign matter can be inspected by a foreign matter detection unit. Specifically, when the detection pin pushes the foreign matter, the metal detection plate is pushed to generate electrical conduction with the standby conductor, so that the other side detection unit can detect the presence of the foreign matter. Therefore, it is possible to automatically inspect the presence or absence of foreign matter that may remain inside the through hole.

Further, in the embodiment in which the foreign matter detecting unit is the continuity detecting unit, it is possible to detect the presence of foreign matter without pushing the foreign matter.
Further, in the embodiment in which the drive unit has a swing arm, a pair of air cylinders, and a drive control unit, even if a shock occurs when the detection pin is inserted, the air cylinder exerts a buffering action to soften the shock. Therefore, the product is not adversely affected, and the inspection device for the heading machine itself does not break down. For example, even if the molding target portion is carried in while being bonded to the work without being subjected to the hole forming processing and the detection pin collides with the molding target portion, no problem occurs.
Further, in the embodiment in which the length on the working side is larger than the length on the driving side of the swing arm, a large amount of movement of the detection pin can be obtained with a small driving amount, and the detection pin can be reciprocated at high speed. In addition, the detection pins can be driven based on the hole forming cycle. Therefore, it is possible to inspect the presence or absence of foreign matter at high speed for all products in response to high-speed manufacturing of the heading machine.

Further, in the aspect provided with the stroke detection unit, by combining the two detection methods, the inspection reliability for the presence or absence of foreign matter is improved, and various kinds of foreign matter can be detected.

Further, in the embodiment in which the product transport unit is further provided, the transport of the product accompanying the inspection can be automated.

Further, in the embodiment in which the detection pin has a hollow tubular shape, the weight of the detection pin can be reduced to enable high-speed inspection and to reduce the size of the drive unit.

Further, the foreign matter can include at least one of a piercing residue removed by the hole forming process, a part to be formed while being bonded to the work, and a burr generated by the hole forming process. Therefore, in addition to the function of inspecting the presence or absence of piercing residue, it is possible to have a function of detecting an unprocessed workpiece and a function of inspecting the presence or absence of burrs.

Further, in the aspect of the inspection device for the squeezing machine provided interchangeably with any set of punches and dies of the multi-process squeezing machine, it remains inside the through hole of the work on the downstream side of any desired squeezing process. The presence or absence of foreign matter to be obtained can be automatically inspected.

It is a top view which shows typically the whole structure of the multi-process stuffing machine provided with the inspection apparatus for crushing machine of 1st Embodiment of this invention. It is sectional drawing which shows the shape of the product manufactured by a multi-process heading machine. It is sectional drawing which shows the shape of the work after molding in the 4th heading process part. It is sectional drawing which shows the shape of the pierce scum removed from the work by the hole forming process in the 5th heading process part. It is a front view of the inspection apparatus for a heading machine of 1st Embodiment. It is a figure of the foreign matter detection part seen from the direction of arrow A of FIG. It is a top sectional view of the foreign matter detection part seen from the direction of arrow B of FIG. It is a figure which shows the structure of the control of the inspection apparatus for a heading machine of 1st Embodiment. It is a figure which shows the structure of the control of the inspection apparatus for a heading machine of 2nd Embodiment. It is a figure which shows the tip shape of the detection pin of the inspection apparatus for a heading machine of 3rd Embodiment.

First, the overall configuration of the multi-process pressing machine 9 which is an example of the pressing machine will be described. FIG. 1 is a plan view schematically showing the overall configuration of a multi-process pressure maker 9 provided with the pressure maker inspection device 1 according to the first embodiment of the present invention. The multi-process heading machine 9 is provided with a plurality of sets of punches 96 and dies 93, and sequentially performs molding processing of a plurality of processes on the work. The punch 96 moves along an axis extending in the left-right direction of FIG. The die 93 is arranged with the same axis as the punch 96. The multi-process heading machine 9 also includes a frame 91, a die block 92, a ram 94, a punch block 95, a main drive source 97, and the like. In the first embodiment, the first to fifth heading process sections are composed of five sets of punches 96 and dies 93. The upper side of FIG. 1 is the upstream first heading process part, and the lower side is the downstream fifth heading process part.

The frame 91 is a housing for arranging each part, and is made of iron and is firmly formed. The plurality of die blocks 92 are interchangeably attached to the frame 91. The plurality of dies 93 are interchangeably attached to the front side (left side in the drawing) of each die block 92. A predetermined processing die is formed on the front side of each die 93 facing to the left in the drawing. The ram 94 is held so as to be reciprocating in the axial direction with respect to the frame 91. The plurality of punch blocks 95 are interchangeably attached to the front side (right side in the drawing) of the ram 94. The plurality of punches 96 are interchangeably attached to the front side (right side in the drawing) of each punch block 95. A predetermined processing die is formed on the front side of each punch 96 facing to the right in the drawing.

Further, the multi-process heading machine 9 includes a cutting mechanism portion 75 having a ring-shaped movable cutter and a pusher mechanism. The movable cutter cuts a long wire rod inserted inside the ring shape to create a columnar workpiece having a predetermined size. The pusher mechanism pushes out the workpiece from the movable cutter. Examples of the material of the work include aluminum, iron, and various alloys. The transfer device 7 is arranged from above the die block 92 to the front of the die 93. The transfer device 7 has six pairs of fingers that grip the workpiece or product. The first pair of fingers grips the pushed-out work and conveys it to the first heading process section. The 4 pairs of 2nd to 5th fingers sequentially convey the workpiece formed in the upstream pressure forming process section to the downstream pressing process section. The sixth pair of fingers 71 (see FIG. 5) conveys the product 85 (see FIG. 2) manufactured in the fifth heading process unit to the heading machine inspection device 1. The multi-process heading machine 9 also includes a kickout device (not shown) and the like.

A main drive source 97 is provided to drive the ram 94 back and forth. The main drive source 97 can be, for example, an induction motor or a synchronous motor that operates on a three-phase AC power supply. The main drive source 97 drives the transfer device 7 and the cutting mechanism portion 75 together. The driving force of the main drive source 97 is input to the crankshaft 9A that drives the ram 94 via the flywheel 98, the disc brake 9M, and the reduction mechanism 99. Further, the driving force is branched and transmitted from the crankshaft 9A to the side shaft 9C via the branch gear pair 9B.

The side shaft 9C branches and transmits the driving force upward. The upwardly branched driving force rotationally drives the transfer cam 9D, and the transfer cam 9D drives the transfer device 7. Further, six open / close cams 9F are connected so as to be rotationally driven from the side shaft 9C via the transfer drive 9E. The open / close cams 9F are arranged at equal intervals in the width direction and correspond to the positions between the steps. The open / close cam 9F drives each pair of fingers to open / close.

Further, the side shaft 9C is provided with a cutter cam 9G, and the pusher cam 9H, the feed cam 9J, the feed roller 9K, and the same number of kickout cams 9L as the die 93 are connected. The cutter cam 9G, pusher cam 9H, feed cam 9J, and feed roller 9K drive the cutting mechanism portion 75. The kickout cam 9L drives a kickout pin (not shown) to project a molded workpiece or product from the die 93.

Next, the shapes of the product 85 and the work 81 handled by the multi-process heading machine 9 will be described. FIG. 2 is a cross-sectional view showing the shape of the product 85 manufactured by the multi-process heading machine 9. FIG. 3 is a cross-sectional view showing the shape of the work 81 after being molded in the fourth heading process section. FIG. 4 is a cross-sectional view showing the shape of the pierce scum 83 removed from the work 81 by the hole forming process in the fifth heading process section. As shown in FIG. 2, the product 85 has a cylindrical shape having a through hole 86, and has an outer diameter D1, an inner diameter D2, and a height H.

As described above, the cutting mechanism portion 75 supplies the columnar workpiece having a predetermined size to the first heading process portion. The columnar work becomes the work 81 having the shape shown in FIG. 3 by four molding processes from the first heading process part to the fourth heading process part. The work 81 has the same outer diameter D1, inner diameter D2, and height H as the product 85, and includes a molding target portion 82 inside the through hole 86. The molding target portion 82 projects inwardly in an annular shape from an inner surface in the middle of the through hole 86 in the height direction, and has an inner diameter D3 thereof. The work 81 becomes a product 85 by removing the molding target portion 82 by the hole forming process performed in the fifth heading process section. The product 85 is manufactured at a high speed of about 130 pieces per minute.

The removed molding target portion 82 becomes a pierce scum 83. Therefore, the shape of the pierce scum 83 shown in FIG. 4 has an outer diameter substantially equal to the inner diameter D2 of the product 85 and an inner diameter substantially equal to the inner diameter D3 of the molding target portion 82. In the fifth heading process section, the pierce residue 83 is separated from the product 85 and discharged downward. However, there may be a rare problem that the piercing residue 83 remains as a foreign substance inside the through hole 86 of the product 85. This defect often occurs due to wear of the punch 96 or the die 93. The inspection device 1 for a squeeze machine according to the first embodiment is arranged on the downstream side of the fifth squeeze process section (see FIG. 1). The inspection device 1 for the heading machine inspects the presence or absence of the piercing residue 83 inside the through hole 86 for all of the products 85.

The detailed description of the inspection device 1 for a heading machine according to the first embodiment will be given. FIG. 5 is a front view of the inspection device 1 for a heading machine according to the first embodiment. The inspection device 1 for a pressure machine is composed of a detection pin 2, a drive unit 3, a foreign matter detection unit 4, a stroke detection unit 5, and the like. FIG. 6 is a view of the foreign matter detecting unit 4 as seen from the direction of arrow A in FIG. Further, FIG. 7 is a plan sectional view of the foreign matter detecting unit 4 as viewed from the direction of arrow B in FIG. Further, FIG. 8 is a diagram showing a control configuration of the inspection device 1 for a heading machine according to the first embodiment.

The transfer device 7 grabs the product 85 whose center line is horizontal by a pair of fingers 71 in the fifth heading process section, and carries it into the heading machine inspection device 1 as shown in FIG. The detection pin 2 and the drive unit 3 are arranged on one side of the carried-in product 85, and the foreign matter detecting unit 4 is arranged on the other side of the carried-in product 85. At this time, the product 85 is electrically connected to the frame 91 via the fingers 71. When the inspection described later is completed, the transfer device 7 opens the pair of fingers 71 and drops the product 85 onto the carry-out conveyor 72. As a result, the product 85 is carried out of the multi-process heading machine 9. Therefore, the transfer device 7 and the carry-out conveyor 72 constitute the product transfer unit of the present invention.

The detection pin 2 is composed of a pin body 21 and a rear engaging portion 22. The pin body 21 is formed in an axisymmetric hollow tubular shape centered on the axis AX. The pin body 21 has a hollow tubular shape, which makes it possible to reduce the weight, enable high-speed movement, and move with a small driving force. The position of the axis AX coincides with the center line of the delivered product 85. The shape of the tip on the right side of FIG. 5 of the pin body 21 is assumed to match the shapes of the through hole 86, the pierce scum 83, and the molding target portion 82. That is, the outer diameter D4 of the pin body 21 is set smaller than the inner diameter D2 of the product 85, and is set larger than the inner diameter (≈inner diameter D3) of the pierce scum 83.

A rear engaging portion 22 is integrally provided on the rear side of the pin body 21. The rear engaging portion 22 has an elongated hole 23 that is long in the vertical direction. The detection pin 2 is housed in a guide cylinder 24 provided on the frame 91. The detection pin 2 is movable inside the guide cylinder 24 along the axis AX, and is inserted into the through hole 86 of the product 85 carried on the extension line of the axis AX. Therefore, the direction from left to right in FIG. 5 is the insertion direction of the detection pin 2, and the direction from right to left is the exit direction of the detection pin 2.

The drive unit 3 includes a swing arm 31, a drive source, a drive control unit, and the like. As shown in FIGS. 5 and 8, a pair of insertion-side air cylinders 32, exit-side air cylinders 33, and high-pressure air sources 34 are provided as drive sources. As the drive control unit, an electromagnetic switching valve 35 is provided, and the pressure structure control unit 61 is also used.

The swing arm 31 is a substantially T-shaped member. The swing arm 31 has a first drive point 311 at the upper end of the tip of the first drive arm extending to the left in FIG. The swing arm 31 has a second drive point 312 at the upper end of the tip of the second drive arm extending to the right in FIG. The swing arm 31 has an action point 313 at the tip of the action arm extending downward. The point of action 313 has a pin shape and is loosely fitted in the elongated hole 23 of the rear engaging portion 22 of the detection pin 2. The swing arm 31 has a fulcrum 314 at a key position where the two driving arms and the acting arm meet. The fulcrum 314 is swingably supported by a support plate 911 erected on the frame 91. The swing arm 31 swings with the fulcrum 314 as the swing center.

The insertion side air cylinder 32 and the exit side air cylinder 33 are fixed to the support plate 911 and arranged above the swing arm 31. As shown in FIG. 8, the insertion side air cylinder 32 and the exit side air cylinder 33 are connected to the high pressure air source 34 via the electromagnetic switching valve 35. The electromagnetic switching valve 35 communicates the exit side air cylinder 33 with the high pressure air source 34 in the non-excited state shown in FIG. Further, the electromagnetic switching valve 35 communicates the insertion side air cylinder 32 with the high pressure air source 34 in the excited state. The non-excitation and excitation of the electromagnetic switching valve 35 are controlled by the heading control unit 61. When the insertion side air cylinder 32 and the exit side air cylinder 33 are not communicated with the high pressure air source 34, the high pressure air inside is discharged.

The insertion side air cylinder 32 and the exit side air cylinder 33 alternately drive the first drive point 311 and the second drive point 312. More specifically, the insertion side air cylinder 32 has an insertion side piston 321 that descends due to the inflow of high pressure air. The descending insertion-side piston 321 pushes down the first drive point 311 to swing and drive the swing arm 31 counterclockwise in FIG. As a result, the point of action 313 moves to the right in FIG. 5, and the detection pin 2 is driven in the insertion direction. The exit-side air cylinder 33 has an exit-side piston 331 that descends due to the inflow of high-pressure air. The descending exit side piston 331 pushes down the second drive point 312 to swing and drive the swing arm 31 clockwise in FIG. As a result, the point of action 313 moves to the left in FIG. 5, and the detection pin 2 is driven in the exit direction.

Here, the first length R1 connecting the fulcrum 314 and the first drive point 311 is equal to the second length R2 connecting the fulcrum 314 and the second drive point 312. The first length R1 and the second length R2 correspond to the drive side length. The working side length R3 connecting the fulcrum 314 and the working point 313 is larger than the first length R1 and the second length R2. Therefore, the working point 313 is largely moved by the small driving amount of the first driving point 311 and the second driving point 312, and a large moving amount of the detection pin 2 is obtained. This enables high-speed inspection corresponding to high-speed manufacturing of the multi-process heading machine 9.

The configuration of the drive unit 3 can be variously modified. For example, instead of the insertion side air cylinder 32 and the exit side air cylinder 33, an electric device such as a rotary solenoid or a stepping motor can be used. In this case, the drive angle range of the electric device is matched with the swing angle range of the swing arm 31 for driving. According to this, even in the multi-process pressure maker 9 in the factory where the high pressure air source 34 is not provided, the inspection at high speed becomes possible. Further, for example, one air cylinder that linearly drives the detection pin 2 may be used without using the swing arm 31. Further, the detection pin 2 may be driven linearly by branching and using the driving force of the main drive source 97 with a cam or the like.

As shown in FIG. 5, the foreign matter detecting unit 4 has a other side detecting unit that is arranged close to the other side of the product 85. The other side detection unit includes a detection case 41, a detection plate 42, a coil spring 43, a standby conductor 44, and the like. The heading control unit 61 is also used as a determination unit for determining the presence or absence of foreign matter.

The detection case 41 is fixed to the frame 91. The detection case 41 has an internal space 411 and a round window 412 having a common axis AX on the side facing the product 85. The inner diameter of the round window 412 is set to be smaller than the outer diameter D1 of the product 85 so that the product 85 does not enter. In addition, the inner diameter of the round window 412 is set to be larger than the outer diameter (≈inner diameter D2) of the pierce scum 83 so that the pierce scum 83 can enter.

The detection plate 42 is a metal disk larger than the round window 412, and is held in the internal space 411 of the detection case 41. The detection plate 42 is normally pressed by the coil spring 43 and is located at a normal position in contact with the circumference of the round window 412. The detection plate 42 is electrically connected to the frame 91 via the coil spring 43. When the detection plate 42 is pushed in the insertion direction of the detection pin 2, the detection plate 42 moves against the coil spring 43 to a detection position separated from the round window 412.

The standby conductor 44 is a metal rod body and is arranged in the internal space 411 of the detection case 41. The standby conductor 44 is electrically insulated from the frame 91 and attached. The standby conductor 44 does not contact the detection plate 42 at the normal position, but contacts the detection plate 42 at the detection position. Therefore, the detection plate 42 and the standby conductor 44 form a non-voltage contact 45. As shown in FIG. 7, the standby conductor 44 is connected to the connecting lead 47 inside the insulating box 46. The connection lead 47 is connected to the sensor controller 48. The sensor controller 48 is provided so as to be grounded to the frame 91, and is connected to the heading control unit 61. When the non-voltage contact 45 is electrically connected even for a moment, the sensor controller 48 maintains the conductive state for a predetermined time to stabilize the contact information.

The stroke detection unit 5 monitors the movement stroke amount of the detection pin 2 and detects the shortage of the movement stroke amount caused by the foreign matter. As the stroke detection unit 5, a piston position detection sensor embedded in the insertion side air cylinder 32 is used. The stroke detection unit 5 detects the lowering position of the insertion side piston 321 and sends the detection information to the heading control unit 61. The swing angle of the swing arm 31 and the position of the detection pin 2 are specified from the lowering position of the insertion-side piston 321. As the stroke detection unit 5, an angle sensor that detects the swing angle of the swing arm 31, a linear encoder that directly detects the position of the detection pin 2, or the like may be used.

The squeeze control unit 61 controls the entire squeeze operation of the multi-process squeeze machine 9. The heading control unit 61 can be configured by using an electronic control device having a CPU and operating by software. The heading control unit 61 is used by being grounded to the frame 91. The rotary encoder 62 is connected to the heading control unit 61. The rotary encoder 62 is conventionally provided in general for detecting the rotation phase of the main drive source 97.

The heading control unit 61 has a determination function of the foreign matter detection unit 4. More specifically, the pressure structure control unit 61 detects the state of the non-voltage contact 45 composed of the detection plate 42 and the standby conductor 44 by supplying power to the sensor controller 48. Then, when the pressure-building control unit 61 detects the conduction state of the non-voltage contact 45, it outputs a detection signal Sa meaning “foreign matter is present”. Further, the pressure structure control unit 61 acquires the detection information of the stroke detection unit 5, and outputs the detection signal Sb when the shortage of the moving stroke amount of the detection pin 2 is detected. When the detection signal Sa or the detection signal Sb is output, the heading control unit 61 interrupts the heading operation and waits for the arrival of the inspector. Further, the pressure structure control unit 61 also serves as a part of the function of the drive control unit, and controls the electromagnetic switching valve 35 described above.

Next, the operation and operation of the inspection device 1 for a heading machine according to the first embodiment configured as described above will be described. The heading control unit 61 controls the heading operation and inspects the presence or absence of foreign matter based on the execution cycle of the hole forming process in the fifth heading process unit. The heading control unit 61 predicts the delivery timing of the product 85 from the fifth heading process unit based on the detection information of the rotary encoder 62, and excites the electromagnetic switching valve 35 in accordance with this. As a result, high-pressure air flows into the insertion-side air cylinder 32, the insertion-side piston 321 is lowered, and the detection pin 2 is driven in the insertion direction.

When the product 85 is normal, the tip of the detection pin 2 is inserted into the through hole 86 of the product 85, passes through the through hole 86, and reaches the middle of the round window 412. Even so, the tip of the detection pin 2 does not reach the detection plate 42, so that the detection plate 42 does not move from the normal position and the non-voltage contact 45 remains cut off. Therefore, the heading control unit 61 does not output the detection signal Sa. Further, since the insertion side piston 321 is sufficiently lowered, the heading control unit 61 does not output the detection signal Sb.

When the pierce residue 83 remains in the through hole 86 of the product 85, the tip of the detection pin 2 inserted into the through hole 86 pushes the pierce residue 83. The pierced scum 83 that is pushed moves inside the round window 412, and further pushes the detection plate 42 in the insertion direction. As a result, the detection plate 42 moves from the normal position to the detection position, and the non-voltage contact 45 changes to the conductive state. Therefore, the heading control unit 61 outputs the detection signal Sa.

Further, the pierce scum 83 becomes an obstacle, and the amount of movement stroke of the detection pin 2 becomes insufficient. Therefore, the insertion side piston 321 cannot be sufficiently lowered. Therefore, the heading control unit 61 also outputs the detection signal Sb. As described above, the remaining pierce residue 83 is detected by each of the two detection methods, and the inspection reliability is improved. At this time, the insertion side air cylinder 32 exerts a cushioning action to alleviate the shock. Therefore, the product 85 is not adversely affected, and the inspector 1 for the heading machine itself does not break down.

Further, it is conceivable that the work 81 from which the pierce residue 83 has not been removed may be carried in for some reason. In this case, the tip of the detection pin 2 inserted into the through hole 86 collides with the molding target portion 82 and stops. Therefore, the detection plate 42 does not move and the detection signal Sa is not output. On the other hand, since the amount of descent of the insertion-side piston 321 is significantly insufficient, the detection signal Sb is output. Even at this time, the insertion side air cylinder 32 exerts a cushioning action to soften the shock, so that no trouble occurs.

When the inspection is completed, the heading control unit 61 cancels the excitation of the electromagnetic switching valve 35. Then, high-pressure air flows into the exit-side air cylinder 33, and the exit-side piston 331 descends. At the same time, high-pressure air flows out from the insertion-side air cylinder 32, and the insertion-side piston 321 rises. As a result, the detection pin 2 is driven in the exit direction. After that, the pair of fingers 71 are released, and the product 85 is dropped and carried out.

The inspection device 1 for a squeezing machine of the first embodiment is provided in a multi-process squeezing machine 9 for manufacturing a product 85 having a through hole 86 by performing a hole forming process on a work 81 using a punch 96 and a die 93. An inspection device 1 for a heading machine that inspects the presence or absence of foreign matter that may remain inside the through hole 86, and has a tip shape that matches the shape of the through hole 86 and the foreign matter, and is a through hole from one side of the product 85. The detection pin 2 inserted into the through hole 86, the drive unit 3 for driving the insertion and exit of the detection pin 2 into the through hole 86, and the detection pin 2 inserted into the through hole 86 push the foreign matter or become a foreign matter. A foreign matter detecting unit 4 for detecting the contact is provided.

According to this, the detection pin 2 can be inserted into the through hole 86 from one side of the product 85 by the drive unit 3, and the presence or absence of foreign matter can be inspected by the foreign matter detection unit 4. Therefore, the presence or absence of foreign matter that may remain inside the through hole 86 can be automatically inspected.

Further, the foreign matter detection unit 4 is held on the other side of the product 85 and is pushed by the pushed pierce scum 83 (foreign matter) to move in the insertion direction of the detection pin 2 or come into contact with the pushed foreign matter. It has a detection plate 42 and a detection unit on the other side that detects the movement of the detection plate 42 or the contact between the detection plate 42 and a foreign object. According to this, the presence of the foreign matter can be reliably detected by pushing the foreign matter.

Further, when the metal detection plate 42 is pushed by the pushed pierce scum 83 (foreign matter) and moves in the insertion direction of the detection pin 2, it comes into contact with the standby conductor 44, and the other side detection unit is with the detection plate 42. Detects the electrical continuity state with the standby conductor 44. According to this, when the detection plate 42 and the standby conductor 44 are electrically connected to each other, it is possible to reliably detect the presence of foreign matter.

Further, a stroke detection unit 5 is further provided, which monitors the movement stroke amount of the detection pin 2 and detects the shortage of the movement stroke amount caused by a foreign substance. According to this, by combining the two detection methods, the inspection reliability for the presence or absence of foreign matter is improved, and various kinds of foreign matter can be detected.

Further, a transfer device 7 (product transfer unit) is further provided, in which the product 85 is carried in from the fifth heading process unit composed of the punch 96 and the die 93, and the product 85 for which the inspection has been completed is carried out. According to this, the transportation of the product 85 accompanying the inspection can be automated.

Further, the drive unit 3 includes a swing arm 31 having a fulcrum 314 that is swingably supported, a first drive point 311, a second drive point 312, and an action point 313 that drives the detection pin 2, and a first drive. It has a drive source that swings the swing arm 31 by applying a drive force to the point 311 and the second drive point 312, and a drive control unit that controls the drive source based on the execution cycle of the hole forming process. The fulcrum 314 and the point of action 313 were connected rather than the first length R1 connecting the fulcrum 314 and the first drive point 311 of the swing arm 31 and the second length R2 connecting the fulcrum 314 and the second drive point 312. The acting side length R3 is larger.

According to this, since the working side length R3 is larger than the driving side length (first length R1, second length R2) of the swing arm 31, the insertion side piston 321 and the exit side piston 331 are small. A large amount of movement of the detection pin 2 can be obtained depending on the driving amount. Therefore, the detection pin 2 can be reciprocated at high speed. In addition, the detection pin 2 can be driven based on the hole forming cycle. Therefore, it corresponds to the high-speed manufacturing of the multi-process heading machine 9, and the presence or absence of foreign matter can be inspected at high speed for all of the products 85.

Further, the swing arm 31 has a first drive point 311 and a second drive point 312 as a pair of drive points, and the drive source is a pair of insertion side air cylinders 32 and exits that alternately drive the pair of drive points. The side air cylinder 33. According to this, even if a shock occurs when the detection pin 2 is inserted, the insertion side air cylinder 32 and the exit side air cylinder 33 exert a buffering action to alleviate the shock. Therefore, the product 85 is not adversely affected, and the inspector 1 for the heading machine itself does not break down. For example, even if the molding target portion 82 is carried in while being coupled to the work 81 without being subjected to the hole forming processing and the detection pin 2 collides with the molding target portion 82, no problem occurs.

Further, the detection pin 2 has a hollow tubular shape. According to this, the weight reduction of the detection pin 2 enables high-speed inspection and makes the drive unit 3 smaller.

Further, the foreign matter includes a piercing residue 83 that is removed from the work 81 by the hole forming process, and a molding target portion 82 that remains bonded to the work 81 without being subjected to the hole forming process. According to this, in addition to the function of inspecting the presence or absence of the pierce scum 83, it is possible to have a function of detecting the raw work 81.

Next, the point that the inspection device 1A for the heading machine of the second embodiment, in which the foreign matter detecting unit is the continuity detecting unit 4A, is different from that of the first embodiment will be mainly described. FIG. 9 is a diagram showing a control configuration of the inspection device 1A for a heading machine according to the second embodiment. In the second embodiment, the detection case 41, the detection plate 42, and the like are not used. In the continuity detection unit 4A in the second embodiment, the detection pin 2 is used as a sensor, and the heading control unit 61 is also used. That is, the detection pin 2 is made of metal, is electrically insulated from the frame 91, and is connected to the sensor controller 48.

On the other hand, the pierce residue 83 remaining in the product 85 and the molding target portion 82 still connected to the work 81 are electrically connected to the frame 91 via the fingers 71. Therefore, a non-voltage contact 45A is formed between the detection pin 2 and the pierce scum 83. Similarly, a non-voltage contact 45A is configured between the detection pin 2 and the molding target portion 82. Therefore, when the detection pin 2 moving in the insertion direction comes into contact with the pierce scum 83 or the molding target portion 82, the non-voltage contact 45A becomes conductive. The heading control unit 61 can detect the piercing residue 83 or the molding target unit 82 from this conduction state.

In the inspection device 1A for a pressure maker of the second embodiment, the foreign matter detecting unit is a continuity detecting unit that detects that the metal detection pin 2 is in contact with the metal foreign matter and is electrically conductive. According to this, it is possible to detect the presence of a foreign matter without pushing the foreign matter.

Next, the inspection device for the heading machine of the third embodiment, which has a different tip shape of the detection pin 2B, will be mainly described as being different from the first embodiment. FIG. 10 is a diagram showing the tip shape of the detection pin 2B of the inspection device for a heading machine according to the third embodiment. In the third embodiment, the configuration other than the tip shape of the detection pin 2B is the same as that in the first embodiment. The detection pin 2B of the third embodiment is composed of a pin body 25 and a rear engaging portion 22.

The pin body 25 is formed in an axisymmetric hollow tubular shape centered on the axis AX. The shape of the tip on the right side of FIG. 10 of the pin body 25 is adapted to the shape of the burr 87 in addition to the through hole 86, the pierce scum 83, and the molding target portion 82. Specifically, the outer circumference of the tip shape of the pin body 25 is stepped. That is, the outer diameter D4 of the small diameter portion 26 on the most distal end side is the same as the outer diameter D4 of the first embodiment. The outer diameter D5 of the large diameter portion 27 on the rear side of the small diameter portion 26 is set to be larger than the outer diameter D4 and slightly smaller than the inner diameter D2 of the product 85.

When the detection pin 2B of the third embodiment is used, not only the piercing residue 83 and the molding target portion 82 but also the burr 87 inside the through hole 86 of the product 85 can be detected. That is, since the small diameter portion 26 acts on the pierce scum 83 and the molding target portion 82 in the same manner as in the first embodiment, the same detection is performed. In addition, when a small burr 87 is generated inside the insertion end side of the through hole 86, the small diameter portion 26 does not collide with the burr 87, but the tip of the large diameter portion 27 collides with the burr 87, and the detection pin 2B Stop.

Here, the amount of movement stroke of the detection pin 2B differs depending on whether the small diameter portion 26 collides with the molding target portion 82 or the large diameter portion 27 collides with the burr 87. Therefore, the heading control unit 61 can distinguish between the molding target unit 82 and the burr 87 based on the detection information of the stroke detection unit 5.

In the inspection device for a heading machine of the third embodiment, in addition to the function of inspecting the presence or absence of the pierce scum 83, it becomes possible to have a function of detecting the raw work 81 and a function of inspecting the presence or absence of the burr 87. ..

In the first embodiment, the inspection device 1 for a heading machine is arranged on the downstream side of the fifth heading process unit, but the present invention is not limited to this. That is, the inspection device 1 for the squeezing machine may be provided so as to be replaceable with the punch 96 and the die 93 of any set of the multi-process squeezing machine 9. According to this, it is possible to automatically inspect the presence or absence of foreign matter that may remain inside the through hole of the work on the downstream side of any desired heading process.

Further, it is preferable that the tip shape of the detection pin 2 is appropriately changed according to various shapes of the plurality of types of products and the pierce scum. Further, as the foreign matter detecting unit 4, it is also possible to use a detection method different from that of the first and second embodiments. For example, when the product 85 and the pierce scum 83 are made of iron, an approach detection sensor that detects the approach of the pushed pierce scum 83 by the generation of an induced magnetic field can be used. Further, when considering only the pierce scum 83 as the foreign matter to be inspected, the stroke detection unit 5 can be omitted. The present invention is not limited to the configuration of the embodiment, and various applications and modifications other than those described above are possible.

1, 1A: Inspection device for pressure machine 2, 2B: Detection pin 21: Pin body 25: Pin body 26: Small diameter part 27: Large diameter part 3: Drive unit 31: Swing arm 311: Insertion side drive point 312: Exit Side drive point 313: Action point 314: fulcrum 32: Insertion side air cylinder 33: Exit side air cylinder 35: Electromagnetic switching valve 4: Foreign matter detection unit 42: Detection plate 44: Standby conductor 45, 45A: Non-voltage contact 5: Stroke Detection unit 61: Pneumatic control unit 7: Transfer device 71: Finger 81: Work 82: Molding target unit 83: Pierce scum 85: Product 86: Through hole 87: Burr 9: Multi-process voltage machine 91: Frame 93: Die 96: Punch R1: Insertion side length R2: Exit side length R3: Acting side length

Claims (9)

An inspection device for a pressure machine that is installed in a pressure machine that manufactures products with through holes by performing hole forming processing on the work using punches and dies, and inspects the presence or absence of foreign matter that may remain inside the through holes. There,
A detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product.
A drive unit that drives the insertion and exit of the detection pin into the through hole, and
And a foreign object detection section for detecting that said through hole said detection pin inserted into has pushed the foreign matter,
The foreign matter detection unit
A metal detection plate held on the other side of the product and pushed by the foreign matter to move in the insertion direction of the detection pin.
The standby conductor with which the moving detection plate comes into contact, as well as
An inspection device for a heading machine , which has a detection unit on the other side that detects foreign matter by an electrically conductive state between the detection plate and the standby conductor . An inspection device for a pressure machine that is installed in a pressure machine that manufactures products with through holes by performing hole forming processing on the work using punches and dies, and inspects the presence or absence of foreign matter that may remain inside the through holes. There,
A detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product.
A drive unit that drives the insertion and exit of the detection pin into the through hole, and
E Bei and a foreign object detection section for detecting that the detection pin which is inserted into the through hole pushes the foreign object, or in contact with the foreign matter,
The foreign matter detection unit is an inspection device for a heading machine , which is a continuity detection unit that detects that the metal detection pin comes into contact with the metal foreign matter and is electrically conductive . An inspection device for a pressure machine that is installed in a pressure machine that manufactures products with through holes by performing hole forming processing on the work using punches and dies, and inspects the presence or absence of foreign matter that may remain inside the through holes. There,
A detection pin that has a tip shape that matches the shape of the through hole and the foreign matter and is inserted into the through hole from one side of the product.
A drive unit that drives the insertion and exit of the detection pin into the through hole, and
A foreign matter detecting unit for detecting that the detection pin inserted into the through hole pushes the foreign matter or comes into contact with the foreign matter is provided .
The drive unit
A swing arm having a fulcrum supported so as to be swingable, a pair of drive points, and an action point for driving the detection pin.
A pair of air cylinders that alternately drive the pair of drive points,
An inspection device for a heading machine , comprising a drive control unit that controls a pair of the air cylinders based on an execution cycle of the hole forming process . The inspection device for a squeeze machine according to claim 3, wherein the length of the working side connecting the fulcrum and the working point is larger than the length of the driving side connecting the fulcrum and the driving point of the swing arm. The inspection device for a squeeze machine according to any one of claims 1 to 4, further comprising a stroke detection unit that monitors the moving stroke amount of the detection pin and detects the shortage of the moving stroke amount caused by the foreign matter. The squeezing machine according to any one of claims 1 to 5, further comprising a product transporting section for carrying in the product from a squeezing process section composed of the punch and the die and carrying out the product for which inspection has been completed. Inspection equipment. The inspection device for a pressure machine according to any one of claims 1 to 6 , wherein the detection pin has a hollow tubular shape. The foreign matter is at least one of a piercing residue removed from the work by the hole forming process, a molding target portion which is not subjected to the hole forming process and remains bonded to the work, and a burr generated by the hole forming process. The inspection device for a stamping machine according to any one of claims 1 to 7 , which includes. The squeezing machine is a multi-process squeezing machine including a plurality of sets of the punch and the die.
The inspection device for a squeeze machine according to any one of claims 1 to 8 , which is provided interchangeably with any set of the punch and the die.

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