JPS6359773B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punching device, and more specifically, it is capable of performing several punching steps when moving a fixed length sheet material forward and backward in the left and right direction. The present invention also relates to a punching device that can select punches in several steps to be in a no-punch state as necessary.

Conventionally, when punching products from plate materials, long strip-shaped materials called coil materials, band plates, strip materials, etc., in other words hoop materials, are wound into a coil shape and punched in one direction using a roll feed, gripper feed, etc. This is done using a die set that automatically feeds the material and incorporates tools for several processes in series.

General punching is suitable for mass production when the thickness of the plate is thin enough to be rolled into a coil, but when the thickness of the product is relatively thick and the material cannot be rolled into a coil, Using a sheet material of a fixed length, this sheet material of a fixed length is automatically fed in two orthogonal directions, and the product is punched using one die set that incorporates tools for several processes in series. is desirable.

However, conventional die sets, for example,
As disclosed in Publication No. 26219, since the tools for each process are simply arranged in series from one side, it is difficult to process the sheet material during reciprocating movement; for example, it is difficult to process the sheet material only during forward movement. It was something to do. Therefore, when processing the next row, the sheet material must be returned to its original position, resulting in a problem that it takes a great deal of time to move the sheet material.

The present invention has been made in view of this problem, and allows punching to be performed even during forward and backward movement of a fixed length sheet material in the left and right direction.
In addition, the punch in each process can be selected to be punchless as required.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings. In the following explanation, the left-right direction refers to a direction corresponding to the left-right direction in FIGS. 1 and 2, and the up-down direction refers to a direction equivalent to the up-down direction in FIG. 1. means the side corresponding to the lower side in Figure 2 is the front,
The side corresponding to the upper side is referred to as the rear side.

FIG. 1 and FIG. 2 show a front view and a plan view of a punching device 1 according to the present embodiment. A stand 5 is integrally provided, and a fixed table 9 on which a fixed length sheet material 7 is placed is mounted on the front side (lower side in FIG. 2) of the machine stand 5. On both sides of the fixed table 9, movable tables 11 for placing and supporting the sheet material 7 together with the fixed table 9 are mounted so as to be movable in the front and rear directions.

That is, first guide rails 13 are provided horizontally extending in the front and back direction on both upper sides of the machine base 5, and each first guide rail 13 has a sliding body attached to each movable table 11 as appropriate. 15 is slidably provided. The movable tables 11 on both sides are integrally connected near their front ends (lower ends in FIG. 2) via a connecting member 17 extending in a direction perpendicular to the direction in which the first guide rail 13 extends.

The connecting member 17 and the fixed table 9 are configured so as not to interfere with each other, and a plurality of free bearings 19 are appropriately installed on the upper surface of the fixed table 9 and each movable table 11 to facilitate the movement of the sheet material 7. It is installed on. A nut member 21 (see FIG. 1) is installed at the bottom of the connecting member 17 near the center.
is attached to the nut member 21, and a screw rod 23 that extends in the front-rear direction on the base 5 and is rotatably supported is screwed into the nut member 21. One end of the screw rod 23 is appropriately interlocked and connected to a first rotational drive device 25 such as a servo motor.

The first rotational drive device 25 includes the connecting member 1
7 is moved back and forth to perform positioning in the front and back direction. The fixed table 9 is provided with a notch in the front-back direction so that the nut member 21 provided on the connecting member 17 that is moved in the front-back direction by the drive of the first rotary drive device 25 and the fixed table 9 do not interfere with each other. A notch 27 (see FIG. 2) is provided.

On the connecting member 17, a first guide rail 1 is provided.
A plurality of second guide rails 29 extending in a direction perpendicular to the second guide rails 2 are attached.
9 , a movable body 31 is supported so as to be slidable in a direction perpendicular to the moving direction of the movable table 11 .
A screw rod 33 extending in the same direction as the extending direction of the connecting member 17 is screwed into a nut member (not shown) integrally attached to the movable body 31 . The screw rod 33 is rotatably supported by the connecting member 17, and is appropriately interlocked with a second rotational drive device 35 such as a servo motor. The second rotational drive device 35
is for moving and positioning the moving body 31 in the left-right direction.

The first rotary drive device 25 and the second rotary drive device 35 are driven under the control of a numerical control device (not shown) when moving and positioning the sheet material 7 in the front, back, right and left directions. . The memory in the numerical control device stores the punching pattern to be applied to the sheet material 7, the punching order, and the sheet material 7.
The sheet material 7 is positioned so that the pattern described above is processed. Note that when punching the sheet material 7 by the punching device 1, if the tool corresponds to the edge of the sheet material, the tool is controlled by the numerical control device as described below. is a no-punch state.

As already understood, the sheet material 7 is moved and positioned in the front, back, left and right directions by appropriately rotating and driving the first and second rotation drive devices 25 and 35. The control of both the rotation drive devices 25 and 35 is as follows:
For example, as shown in FIG. 7, the movement and positioning of the sheet material 7 is controlled in accordance with various machining patterns, such that machining positions are staggered, etc., so that machining corresponding to the machining pattern is performed. .

Rear side of moving body 31 (upper side in Fig. 2)
A work clamp guide rail 37 extending in the same direction as the second guide rail 29 is attached. The work clamp guide rail 37 includes a plurality of work clamps 3 that grip one side edge of the sheet material 7 placed on the fixed and movable tables 9 and 11.
9 is attached so that its position can be adjusted and fixed.

Note that the sheet material 7 is positioned in the front-rear direction by gripping one side edge with the work clamp 39. )for,
A positioning device for positioning the sheet material 7 in the left and right direction is attached. The positioning device is composed of a stopper 41 provided on the upper surface of the movable table 11 so as to be freely retractable. (not shown) moves up and down.

On the machine base 5, a bolster 45 (see FIG. 2) is located behind the fixed table 9 and is appropriately mounted.
As shown in detail in Figures 4 and 5, 1
Two die sets 47 are attached. The die set 47 includes a die holder 51 mounted on the bolster 45 to attach a die plate 49 having an appropriate number of die holes as described later, and a plurality of guide posts 53 erected on both sides of the rear of the die holder 51. The punch holder 55 is guided to be vertically movable by the punch holder 55 and is attached to the lower part of the slide described later.

That is, the die holder 51 is detachably attached to the bolster 45 via a lower attachment plate 57. A rectangular notch 59 is formed at the rear edge (right edge in FIG. 4) of the die holder 51 in order to obliquely install a discharge plate, which will be described later. Guide posts 53 are each integrally erected. Further, the die plate 49 is appropriately attached to the bolster 45, with the adjustment plate 61 interposed therebetween, and located at the front (left side in FIG. 4).

In this embodiment, the die plate 49 includes:
A large diameter die hole 63, which is the second process when manufacturing products that are punched in two processes, such as washers, is bored in the center, and small diameter die holes 63, which are the first process, are drilled in the center on both sides. Die hole 65
are located at equal distances from each other.

The small-diameter die holes 65 for the first process are provided with the same diameter, and the small-diameter die holes 65 and the large-diameter die holes 63 are arranged on a straight line in the left-right direction. It is designed to reduce travel time. Further, at the positions where the adjustment plate 61, die holder 51, lower mounting plate 57, and bolster 45 correspond to the large-diameter die hole 63, a product punched from the sheet material 7 or a punched piece to be scrap is discharged. outlet 67,6
9, 71 and 73 are bored with increasing diameter respectively. Similar discharge ports 75, 77, 79 and 81 are bored in the adjustment plate 61, die holder 51, lower mounting plate 57 and bolster 41 corresponding to each small diameter die hole 65, respectively, with diameters increasing sequentially. be.

A rectangular lower blade attachment plate 83 is attached to the rear of the die holder 51 in close proximity to the adjustment plate 61. Lower blade mounting plate 83
is for attaching a lower blade for shearing the sheet material 7 from which punched pieces have been punched, as will be described later.
A rectangular notch 85 is formed that opens rearward (to the right in FIG. 4). The front edge of this notch 85 is located appropriately forward of that of the notch 59 of the die holder 51. A substantially U-shaped lower blade 87 is mounted on the lower blade attachment plate 83 along its notch 85. The upper surface of the lower blade 87 is connected to the die plate 49.
As shown in FIG.
Vertical guide grooves 89 for guiding guide plates, which will be described later, are formed respectively. Further, a discharge plate 91 for discharging scraps sheared by the lower blade 87 and the like backward is obliquely provided in each of the notches 85 and 59 of the lower blade attachment plate 83 and the die holder 51.

The punch holder 5 is attached to each guide post 53 erected on both rear sides of the die holder 51.
5 has guide bushes 93 on both sides of the rear thereof.
(See Figure 3). The punch holder 55 is detachably attached to the lower surface of a slide, which will be described later, via an upper attachment plate 95 attached to the upper surface thereof. In the punch holder 55, a guide hole 97 is provided at a position corresponding to the large diameter die hole 63 for the second process provided in the die holder 51, as shown in FIG.
is drilled there. A large diameter punch 99, which is a second process tool for punching a product from the sheet material 7 in cooperation with the large diameter die hole 63, is inserted into the guide hole 97 via a plurality of fasteners 101 such as bolts. The attached punch support member 103 is inserted so as to be vertically movable.

A flange portion 105 is formed on the upper part of the punch support member 103.
is a hole 107 provided in the upper mounting plate 95.
It is fitted so that it can move up and down. Around the guide hole 97, there are a plurality of upwardly opened ammunition holes 1.
09 is bored, and each bullet hole 109 has a flange portion 105 of the punch support member 103 inserted thereinto.
A spring-like bomb 1 that constantly urges the large-diameter punch 99 upward together with the punch support member 103
11 are each loaded with bullets.

The vicinity of the upper end of the large diameter punch 99 is guided by a cylindrical punch guide 113 fitted so as to be vertically movable.
It is appropriately attached to a guide support plate 115 attached to the lower surface of the punch holder 55. Also,
A ring-shaped plate holder 117 is fitted near the lower end of the large-diameter punch 99 so as to be movable up and down. This plate holder 117 is used to hold the sheet material 7 during punching.
A plurality of guide pins (not shown) whose upper end is attached to the guide support plate 115 and whose lower end locks the plate holder 117 so as to be movable up and down, and each guide pin It is constantly biased downward by a bullet 119 (see FIG. 6), such as a spring, fitted in the.

On both left and right sides of the large-diameter punch 99, there are marks shown in FIG.
As shown in FIG. 5, small-diameter punches 121, which are tools for the first step of punching the sheet material 7, cooperate with the small-diameter die holes 65 provided in the die plate 49, and are guided by punch guides 123, respectively. A presser plate 125 is fitted near the lower end of the punch plate 125 so as to be movable up and down.
Since the structure is almost the same as that of No. 9, the same reference numerals will be given to the constituent members that perform the same functions, and the explanation thereof will be omitted.

At the rear lower part of the punch holder 55, a fourth
As shown in FIG. 5, a substantially U-shaped upper blade 12 cooperates with the aforementioned lower blade 87 to shear the skeleton-shaped sheet material 7 after the punched pieces have been punched out.
7 is installed. That is, the punch holder 5
A rectangular parallelepiped-shaped upper blade mounting block 129 is attached to the rear lower surface of the blade 5 via an appropriate number of fasteners 131 such as bolts.

At the lower end of the upper blade mounting block 129, a rectangular notch 133 (see FIG. 4) is provided on the front and both left and right sides for attaching the upper blade 127. The portion 133 includes an upper blade 127 that slides into contact with the inner surface of the lower blade 87.
are installed appropriately.

A guide plate 135 is appropriately attached to the rear side of the upper blade mounting block 129, and both left and right ends of this guide plate 135 are connected to the lower blade 8.
It engages with the guide groove 89 formed on the inner surface of the rear end of 7 so as to be vertically movable.

In addition, at the upper end of the upper blade mounting block 129,
A flange portion 137 is integrally formed on the front surface facing the lower blade 87 and on both left and right side surfaces. Near the lower end of the upper blade mounting block 129 corresponding to this flange portion 137, that is, on the outer side of the upper blade 127, there is a substantially U-shaped plate holder 139 that presses and fixes the sheet material 7 onto the lower blade 87. Upper blade 127
It is provided so that it can be moved up and down while making contact with it.

The plate holder 139 has its upper end vertically movably locked to the flange portion 137, and its lower end is guided in the vertical direction by a plurality of guide pins 141 attached to the plate holder 139. A suitable spring 143 such as a spring fitted into each guide pin 141 between the guide pin 139 and the presser foot 139 constantly urges the guide pin 141 downward.

The upper mounting plate 95 of the die set 47 described above is appropriately attached to the lower surface of a slide 145 provided on the frame 3 so as to be movable up and down.

The slide 145 is reciprocated in the vertical direction by known means. Slide 145
At the bottom is a large diameter punch 9, which is a tool for the second process.
9 or the left and right sides of the large-diameter punch 99, each small-diameter punch 121, which is a tool for the first step, is provided with a device that does not press the small-diameter punch 121, that is, a no-punch device, as necessary.

Since each no-punch device has almost the same configuration, the no-punch device related to the large-diameter punch 99, which is a tool for the second process, will be described in detail below, and the no-punch device related to each small-diameter punch 121, which is a tool for the first process, will be described in detail. A description of the no-punch device will be omitted, and each component of the no-punch device related to each small-diameter punch 121 that has the same function as the no-punch device related to the large-diameter punch 99 will be given the same reference numeral.

The no-punch device related to the large-diameter punch 99 is the sixth
As shown in the figure, a cylinder hole 1 is formed in the center of the lower surface of the slide 145 and opens downward.
47, etc. Cylinder hole 14
7 is provided at a position corresponding to the punch support member 103 on which a large diameter punch 99, which is a tool for the second process, is attached, and above this cylinder hole 147,
A cylinder 151 having a cylinder chamber 149 opened downward is integrally fitted therein. Also,
The cylinder 15 is located below the cylinder hole 147.
It is integrally connected to the cylinder 151 via a screw portion 153 formed at the lower end of the outer periphery of the cylinder 1, and
A cover member 157 is integrally fitted with a rod hole 155 passing vertically through it to guide a piston rod, which will be described later.

A piston 159 is fitted in the cylinder chamber 149 so as to be movable up and down.
The upper end of a piston rod 161 slidably inserted into the rod hole 155 is integrally attached. The lower end of the piston rod 161 protrudes from the lid member 157, and a pusher plate 163 for pressing the punch support member 103 on which the large diameter punch 99 is attached is appropriately attached to the lower end.

Further, a vertical groove 165 is formed on the outer peripheral surface near the lower end of the piston rod 161.
The groove 165 has a lid member 157 and a slide 14.
A distal end of a slider 169 slidably inserted is removably engaged with a hole 167 that horizontally penetrates the body portion of the body part 5 in the rearward direction (rightward direction in FIG. 6). A rod 173 is connected to the slider 169, and a bullet locking member 171 fitted in a hole 167 is slidably inserted thereinto, and a limit switch is connected to the dog 177 provided at the outer end of the rod 173. A detector 175 such as the one shown in FIG. 1 is provided at an appropriate position on the slide.

Between the bullet locking member 171 and the movable element 169, a bullet 179 such as a spring is connected to the movable element 1.
69 is loaded with bullets so as to always urge the piston rod 161. When the tip of the slider 169 engages with the groove 165 due to the action of the bullet 179, the dog 177 at the outer end of the rod 173 activates the limit switch 175 and confirms that the piston 159 has moved upward. A signal is transmitted to the numerical control device mentioned above.

The cylinder chamber 149 is divided into an upper first chamber 181 and a lower second chamber 183 by a piston 159.
It is divided into. The first chamber 181 includes a cylinder 151 and a slide 145, as shown in FIG.
A port 18 provided through each body of the
5, and the second chamber 183 is in communication with the lid member 15.
7 and the slide 145, and communicates with a port 187 provided through the respective bodies of the slide 145.

A port 187 communicating with the second chamber 183 connects an air chamber 193 containing only compressed air to a pressure source 189 such as a compressor through a conduit 191, and a switching valve to be described later. It is constantly connected via a conduit 197 branched from a conduit 195. A conduit 195 from the air chamber 193 is connected to the P port of a normal four-port, two-position switching valve 199 that is switched by a solenoid or the like.

A muffler (not shown) is appropriately attached to the R port of the switching valve 199. The A port of the switching valve 199 is connected to the second air pressure on the primary side of the booster 201.
It is connected via a port 205 communicating with the chamber 203 and a conduit 207 . The booster 201 is for increasing the secondary hydraulic pressure supplied to the first chamber 181 in the slide 145 using the air pressure on the primary side to a high pressure. A first cylinder chamber 211 is provided which is open to the right (in the figure).

A piston 217 is slidably fitted into the first cylinder chamber 211 and integrally includes a piston rod 215 that is slidably inserted into a small-diameter second cylinder chamber 213 bored at the bottom of the first cylinder chamber 211. It is equipped. On the other side of the piston 217 (on the right side in FIG. 6), the first cylinder chamber 21
A guide rod 221 is integrally provided, which is slidably inserted through a lid member 219 fitted to the open end of the sensor 1, and the outer end of the guide rod 221 is connected to a dog 2 that operates a detector 225 such as a limit switch.
23 are provided. The detector 225 is for checking the amount of oil in the second cylinder chamber 213 of the slide 145, which communicates with the first chamber 181, as will be described later.

The first cylinder chamber 211 accommodates the piston 21
7 into the second chamber 203 on the piston rod 215 side and the first chamber 227 on the guide rod 221 side. The first chamber 227 communicates with a port 229 formed in the lid member 219, and this port 229 and the B port of the switching valve 199 are connected via a conduit 231.

The longitudinal direction of the second cylinder chamber 213 in the booster 201 (horizontal direction in FIG. 6)
The area near the center communicates with a port 233 bored in the casing body 209, and this port 233 is connected via an oil passage 237 to an oil tank 235 that supplies hydraulic oil into the second cylinder chamber 213. It has been done. In addition, the second cylinder chamber 213
The bottom of the casing body 209 is in communication with a port 239 formed in the casing body 209, and this port 239 is
A pilot check valve 243 is connected via an oil passage 241.
It is connected to

The pilot check valve 243 and the pipe line 207 from the P port of the switching valve 199 described above are connected via a pilot pipe line 245. Port 1 communicates with the pilot check valve 243 and the first chamber 181 in the slide 145.
85 is connected to the oil passage 247 through an oil passage 247, which is activated when the pressure in the first chamber 181 suddenly decreases, and which completely shuts down the punching apparatus 1 when activated. A pressure switch 249 is branched and connected to transmit a signal to the numerical control device to stop the pressure switch. Therefore, the numerical control device has a function of completely stopping the punching device 1 in response to an input signal from the pressure switch 249.

The operation when a product such as a washer is punched out from a regular length sheet material 7 in two steps using the above configuration will be explained.

First, the sheet material 7 is fixed and the movable tables 9, 1
1, and presses against the stopper 41 of the positioning device to position the sheet material in the left and right direction, and also presses against the work clamp 39 to position the sheet material in the front and back direction. grasp. After that, sheet material 7
Corresponding to the punching pattern, the second rotary drive device 35 is appropriately rotated under the control of the numerical control device to move the movable body 31 in the left and right direction, and
The movable tables 11 on both sides are integrally connected to the connecting member 17 by the rotational drive of the first rotational drive device 25.
By moving the sheet material 7 in the front and back direction,
are moved in two directions orthogonal to the die set 47. Then, by moving the sheet material 7 one step at a time and then lowering the slide 145, punching corresponding to each step is performed using a tool installed in series in one die set 47. Note that the skeleton-shaped sheet material 7 punched out by the tools in each process is sequentially sheared into small pieces by the lower blade 87 and upper blade 127 provided at the rear of each tool, and the sheet material 7 is then sheared into small pieces by the discharge plate. 91 to the rear.

The sheet material 7 is moved as follows by arranging the tools for the first step on both sides of the tool for the second step in order to shorten the moving time. That is, first, the sheet material 7 is moved (forward movement) in the same direction as the arrangement direction of each process incorporated in the die set 47 (left and right direction in this example), and the sheet material 7 is moved (forward movement) in the same direction as the arrangement direction of each process incorporated in the die set 47, and the sheet material 7 is moved in the same direction as the alignment direction of each process incorporated in the die set 47, and the sheet material 7 is moved in the same direction as the arrangement direction of each process incorporated in the die set 47 (in the left-right direction in this example). The first row is machined using the second process tool. Next, the sheet material 7 is moved in a direction perpendicular to the tool arrangement direction (front-back direction) to position it in the second row, and the sheet material 7 is also moved in the opposite direction to the movement direction of the first row (backward movement). , machining of the second row is performed using a first step tool and a second step tool different from the first step tool used for machining the first row. When the processing of the second row is completed, the movement of the sheet material 7 for the processing of the third row and subsequent rows is performed by sequentially moving in the front and back direction and repeatedly moving in the opposite direction to the direction of movement of the front row (reciprocating motion). It is something that can be done.

That is, data such as the processing pattern for punching the sheet material 7, the processing order, and the dimensions of the sheet material 7 are stored in advance in the memory of the numerical control device, and the first and second processing patterns are stored in advance in the memory of the numerical control device. The rotation of the rotary drive devices 25, 35 is controlled by a numerical control device, and the sheet material 7 is positioned so that a predetermined processing pattern is processed. In this case, after the sheet material 7 is positioned in the front-rear direction, the sheet material 7 is moved forward or backward in the left-right direction to perform left-right positioning.

Here, when the vicinity of the left and right ends of the sheet material 7 is punched by the tool of the first process or the second process, the tool of the succeeding second process or the tool of the preceding first process is punched. A second
The process tool or the preceding first process tool may be located at a position to cut out the edge of the sheet material 7 in a semicircular shape, as shown in FIG. In the case of the pattern shown in FIG. 7, each no-punch device is operated appropriately as shown in the flowchart shown in FIG.

The operation of the no-punch device related to the second process, that is, the case where the large-diameter punch 99, which is the tool for the second process, is not pressed when the slide 145 descends and the case where it is pressed will be explained below using FIG. 6. .

When the large-diameter punch 99, which is a tool for the second process, is located at a position where the sheet material 7 is not interposed or at a position where the end of the sheet material 7 is notched in a semicircular shape when the slide 145 is lowered, a no-punch state occurs. . That is, under the control of the numerical control device, the switching valve 19
9 is switched from the state shown in FIG. 227 is drained to the outside through the R port of the switching valve 199.

Therefore, the compressed air accumulated in the air chamber 193 is transferred to the cylinder chamber 149 in the slide 145 through the air chamber 193, the pipe 195, the pipe 197 branched from the pipe 195, and the port 187 of the slide 145. Since it is constantly in communication with the second chamber 183 of the slide 145, it instantly flows into the second chamber 183 of the slide 145 and the piston 159
while pushing the piston rod 16 upward.
1, the pusher plate 163 is separated from the punch support member 103 on which the large-diameter punch 99 is attached.

On the other hand, the compressed air in the air chamber 193 flows into the second chamber 203 of the first cylinder chamber 211 in the booster 201 through the pipes 195, 207 and the port 205, and flows into the second chamber 203 of the first cylinder chamber 211 in the booster 201.
01 to the right in FIG. and is drained to the outside via the R port of the switching valve 199.

Furthermore, the compressed air in the air chamber 193 is transferred to the pipe line 19 at the same time as the switching valve 199 is switched.
5. Operate the pilot check valve 243 via the pipe 207 and the pilot pipe 245 branched from the pipe 207 to open the first chamber 18 of the slide 145.
The oil passage 247 communicating with the booster 201 and the oil passage 241 communicating with the second cylinder chamber 213 of the booster 201 are connected.

Therefore, the piston 159 of the slide 145
is lifted up by the compressed air in the first chamber 183 and held above the cylinder chamber 149, and the piston 159 and the piston rod 1
The pusher plate 163 integrally connected via the punch support member 103 is appropriately separated from the punch support member 103. Also, the second chamber 181 of the slide 145
Pressure oil in the booster 201 flows into the second cylinder chamber 213 of the booster 201 via the port 185, the oil passage 247, the pilot check valve 243, and the oil passage 241. Therefore, the large-diameter punch 99 is instantly pushed upward by the spring 111, and the blade portion of the punch is positioned above the sheet material 7. Therefore, even if the slide 145 is lowered, the sheet material 7 will not be punched out.

Next, when the large-diameter punch 99 is located at a position corresponding to the processing position of the sheet material 7, the large-diameter punch 99, which is a tool for the second step, is pressed when the slide 145 descends. In this case,
The switching valve 199 is maintained in the state shown in FIG. The compressed air from the air chamber 193 is transferred to the pipe line 1
95, 231 and the port 229 into the first chamber 227 of the second cylinder chamber 211 in the booster 201, and moves the piston 217 to the left in FIG. At the same time, the air in the second chamber 203 of the second cylinder chamber 211 is
05, the pipe 207, the A port of the switching valve 199, and the R port of the switching valve 199 to drain to the outside.

As the piston 217 moves, the pressure oil in the second cylinder chamber 213 is raised to a high pressure by the action of the piston rod 215, which has a smaller diameter than the piston 217. The pressure oil in the second cylinder chamber 213, which has been raised to a high pressure, flows through the port 239, the oil passage 241, the pilot check valve 243, and the oil passage 2.
47 and port 185 into the first chamber 181 of the cylinder chamber 149 in the slide 145.

Therefore, the piston 159 is strongly pushed downward against the pressure of the compressed air that is constantly flowing into the second chamber 183 from the air chamber 193 through the pipes 195, 197 and the port 187. is held in the correct position. Therefore, the pusher plate 163, which is integrally connected via the piston rod 161, is in contact with the punch support member 103 that supports the large diameter punch 99 at a position approximately at the same height as the lower surface of the slide 145. 99 can punch out the sheet material 7 by cooperating with the large diameter die hole 63 provided in the die plate 49 when the slide 145 is lowered.

As can be understood from the above description of the embodiments, the gist of the present invention is as described in the claims. When moving and performing multiple process machining, even if the first process tool is located at the position where the second process tool punched the product, the first process tool will not punch. It is something that does not have any problems. Therefore, the product can be punched even when the sheet material is moving forward and backward in the left and right direction, and the time required to move the sheet material to the processing start position can be significantly shortened. It is possible.

Particularly, as shown in Fig. 7, when the tool of the preceding first step cuts out one end of the sheet material (the left end in Fig. 7) in a semicircular shape due to the cutting of the product, or the second When the tool after the process cuts out the other end of the sheet material in a semicircular shape, thrust force in the lateral direction (horizontal direction in Fig. 7) acts on both the sheet material and the tool. This affects the positioning accuracy, which in turn reduces the dimensional accuracy of the product, and also causes galling of the punch and die in the tool, reducing the life of the tool.However, in the present invention, tools are required for each process. This solves the above-mentioned problem, and since the tool (punch) that does not apply pressure is lifted by the upward force, it does not apply pressure to the sheet material. It does not leave any impressions.

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in other embodiments by making appropriate design changes.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
2 are a front view and a partially omitted plan view of a punching apparatus according to the present invention, FIG. 3 is a front drawing of a die set, and FIGS. 4 and 5 are - in FIG. 3. 6 is an explanatory diagram of the operation of the no-punch device mounted on the slide, FIG. 7 is an explanatory diagram showing the manner in which the sheet material is punched, and FIG. 8 is a flowchart. Explanation of symbols representing main parts of the drawings, 3... Frame, 5... Machine base, 45... Bolster, 47... Die set, 99... Punch in the second process, 121... Punch in the first process, 145... Slide, 163... Putshya plate.

Claims (1)

[Claims] 1 This is an apparatus for punching products from a sheet material of a fixed length, and tools for multiple processes are mounted on a bolster 45 located below a slide 145 that is vertically movably supported by a frame 3 installed upright on a machine stand 5. A die set 47 arranged in series in the left and right direction is installed, and a connecting member 17 supported on the machine base 5 is provided in front of the die set 47 so as to be movable back and forth.
A work clamp 39 capable of gripping the sheet material 7 to be processed by the die set 47 is attached to the movable body supported by the connecting member 17 and capable of reciprocating in the left-right direction. A tool for the final process of punching out a product from the material 7 is installed in the center, and tools for the first process of performing primary processing on the product are installed at symmetrical positions on both sides of the tool. die set 4
The tools 121 for the first step and the tool 99 for the final step in 7 are provided so as to be movable up and down with respect to the die set 47 and biased upward.
A piston 159 is fitted into each cylinder 151 provided at the lower part of the tool 99 and is biased upward.
Each punch support member 1 attached to the upper part of 121
03, each of the tools 9
Boosters 201 are provided for converting air pressure into hydraulic pressure and supplying pressure oil into each cylinder 151 in order to lower each piston 159 against the urging force when punching is performed by 9 and 121. A punching device that is characterized by the ability to