JPH0726072U - Fusing device for micro joint of iron plate - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device capable of easily fusing a micro joint of an iron plate sent from a punching machine. [Structure] An iron plate 1 on which template plates 2a to 2d are punched and formed by a punching machine B is held and fixed by a holder 24 which also serves as a second electrode, and a first electrode 45 is brought into contact with the template plates 2a to 2d. Voltage is applied. Then template 2a-2
Detail 4 of the neck of the micro joint 4 that connects d and the outer frame 1a
A large current flows intensively in a, and the plurality of neck portions 4a are instantaneously melted by the resistance heat. Further, the first electrode 45 is moved horizontally relative to the iron plate 1 based on the data registered in the memory such as the NC tape 71 provided in the punching machine B.
Can be brought into contact with predetermined positions of the molds 2a to 2d, an equal amount of large current can be applied to the plurality of micro joints 4, and they can be fused uniformly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fusing device for a microjoint of an iron plate for fusing a microjoint of an iron plate having a die plate punched by a punching machine to separate the outer frame of the iron plate from the die plate.

[0002]

[Prior art]

 For example, a template, which is a material for various machines and devices, is formed by punching an iron plate with a punching machine. In this case, if the template is completely punched out and separated from the outer frame of the iron plate, the template and outer frame will come apart and it will be difficult to send the template and outer frame out of the punching machine. With the remaining 3 left, the template is punched out, and the outer frame and template are partially joined by micro joints and sent out to the next stage as is.

Therefore, after the iron plate is sent out from the punching machine, it is necessary to cut the micro joint to completely separate the template and the outer frame. Conventionally, this separation work is performed manually by the operator as follows. Was done by. That is, the iron plate sent from the punching machine is manually transferred onto the table, and the worker hooks the iron plate on the table to lift the iron plate from the table, and in that state, hammers the template many times. The template was separated from the outer frame by forcibly breaking the micro joints.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional means in which the worker hits the template with a hammer to separate it from the outer frame has the following problems. (1) It requires a considerable amount of manpower, is extremely harsh, and has poor work efficiency. (2) The noise of metal sound when the iron plate is struck with a hammer is extremely large. (3) When the template is separated by hitting it with a hammer, the template is scattered around by the impact, so the scattered template must be picked up and sorted according to its type, and the outer frame Since it has to be removed from the hook and collected, the post-treatment after separation is extremely troublesome. (4) Since the surface of the template is struck with a hammer, the surface of the template is easily damaged.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional means and to provide a fusing device for an iron plate microjoint capable of easily and automatically cutting a microjoint of an iron plate sent from a punching machine. .

[0006]

[Means for Solving the Problems]

 For this reason, the present invention provides a first electrode 45 that is in contact with the templates 2a to 2b of the iron plate 1 sent from the punching machine B, and a second electrode 45 that is in contact with the outer frame 1a of the iron plate 1. The pole 24 and the moving device 40 that moves the first electrode 45 in the horizontal direction relative to the iron plate 1 are configured, and the first electrode 45 is applied to a predetermined position of the template 2a to 2d. In order to make contact, a control unit 70 for controlling the moving device 40 based on the position data registered in the memory 71 is provided.

[0007]

[Action]

 According to the above configuration, the simple operation of applying a voltage by bringing the first electrode 45 and the second electrode 24 into contact with the mold plates 2a to 2d and the outer frame 1a and flowing a large current to the micro joint 4 is performed. The plurality of micro joints 4 connecting the template plates 2a to 2d and the outer frame 1a can be simultaneously and instantaneously melted by resistance heat to separate the template plates 2a to 2d and the outer frame 1a without difficulty.

Further, in this case, the first electrode 45 is moved horizontally relative to the iron plate 1 based on the position data of the templates 2 a to 2 d registered in the memory 71, so that the first electrode 45 is moved. Can be brought into contact with predetermined positions of the molds 2a to 2d, an equal amount of large current can be applied to the plurality of micro joints 4 to uniformly melt them.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the overall configuration of an iron plate punching system. This punching system for punching iron plates is a stocker A that stacks and stores the iron plates that are the raw materials, and punches slits along the template by leaving micro joints on the iron plates sent out one by one from this stocker A. A punching machine B for forming, a conveyor C for transporting an iron plate sent from the punching machine B to a fusing device D for a microjoint, and a residue after the microjoint is fused by the fusing device D and the template is separated. The first recovery stage E for recovering the outer frame and the second recovery stage F for recovering the template separated from the outer frame are arranged side by side in this order.

Next, the fusing device D for the micro joint will be described. FIG. 2 is a perspective view of the fusion cutting device D for the micro joint, and FIG. 3 is a front view thereof. In FIG. 2, the iron plate 1 is formed with slits 3 along the templates 2a, 2b, 2c, 2d. As shown, the templates 2a-2d have various sizes and shapes (see also FIG. 4). The slit 3 is punched and formed by the punching machine B. FIG. 5 is a partially enlarged view of a portion indicated by K in FIG. The four corners of the template 2a and the outer frame 1a of the iron plate 1 are partially connected by a micro joint 4. The front end portion of the micro joint 4 on the outer frame 1a side has a neck width 4a having a small width of about 0.3 mm so that the micro joint 4 can be easily melt-cut by a melt-cutting means described later. The corners of the other templates 2b to 2d are also joined to the outer frame 1a by a plurality of micro joints 4.

In FIG. 2, the conveyor C is a roller conveyor including rollers 5. Although not shown in the drawing, chuck conveyor means for chucking the side end portion of the iron plate 1 and conveying it to the fusing device D is provided on the side portion of the conveyor C, and the slit 3 is punched and formed by the punching machine B. The iron plates 1 thus prepared are sent to the fusing device D one by one. In the following description, the iron plate 1 is conveyed in the X direction, and the direction orthogonal thereto is the Y direction.

In FIG. 3, an elevator 10 is installed below the iron plate 1 positioned by the fusing device D. As shown in the figure, the elevating table 10 comprises a table 11 and an X leg 12 that supports the table 11 so that the table 11 can be moved up and down. As will be described later in detail, the template 2a to 2d separated from the outer frame 1a by fusing the micro joint 4 on the table 11 spontaneously falls and is stacked and accumulated. That is, the table 11 serves as a receiving portion that collects the templates 2a to 2d that are separated from the outer frame 1a and naturally fall. The X leg 12 and the X leg 12 are rotatably attached by a pin 13. The upper end of the X leg 12 is pivotally attached to both sides of the lower surface of the table 11 by hinges 14, and the caster 15 is pivotally attached to the lower end of the X leg 12.

A nut 16 is connected to the pin 13. A vertical feed screw 17 is screwed onto the nut 16, and a motor 18 for rotating the feed screw 17 is installed on the floor. Therefore, when the motor 18 is driven and the feed screw 17 rotates forward, the nut 16 rises along the feed screw 17, the X leg 12 gradually stands up, and the table 11 rises. When the feed screw 17 rotates in the reverse direction, the nut 16 descends along the feed screw 17, the X leg 12 gradually falls, and the table 11 descends. That is, the X leg 12, the nut 16, the feed screw 17, the motor 18, and the like serve as height adjusting means for the table 11.

In FIGS. 2 and 3, a first cylinder 21 and a second cylinder 22 are provided on both sides of the table 11 in a horizontal posture. A horizontal bar 23 is connected to the tips of the rod 21a of the first cylinder 21 and the rod 22a of the second cylinder 22. A holder 24 having a U-shaped cross section is connected to both sides of the inner surface of the bar 23. The holder 24 is detachably engaged with the side end of the iron plate 1 to hold it. Further, each holder 24 is grounded via a bar 23, rods 21a and 22a, an earth wire 25 and the like. Therefore, the potential of the holder 24 is always 0 volt.

In FIGS. 2 and 3, nuts 26 are attached to the lower surfaces of the first cylinder 21 and the second cylinder 22, respectively. A feed screw 27 in the X direction is screwed onto the nut 26. A slider 28 is attached to the lower surface of the nut 26. A guide rail 29 in the X direction parallel to the feed screw 27 is arranged on the base 32, and the slider 28 is slidably fitted on the guide rail 29. Both ends of the feed screw 27 are supported by a bearing 31, and a motor 30 for rotating the feed screw 27 is attached to the bearing 31.

FIG. 3 shows a state in which the rod 21 a of the first cylinder 21 and the rod 22 a of the second cylinder 22 are projected and the left and right holders 24 hold both end portions of the iron plate 1. There is. In this state, the iron plate 1 floats in the air and slightly floats from the templates 2a to 2d stacked on the table 11. In this state, when the motor 30 is driven to rotate the feed screw 27 in the forward direction, the nut 26 moves in the X direction along the feed screw 27 and the guide rail 29. Then, the first cylinder 21 and the second cylinder 22 coupled to the nut 26 also move in the X direction (rightward) along the guide rail 29, and the outer frame 1a of the iron plate 1 held by the holder 24 is moved to the first position. It is transferred above the base plate 33 provided on the first recovery stage E. Therefore, when the rod 21a of the first cylinder 21 and the rod 22a of the second cylinder 22 are pulled in, the holding state of the outer frame 1a by the holder 24 is released, and the outer frame 1a falls onto the base plate 33 and is collected. To be done.

A timing belt is provided in place of the nut 26 and the feed screw 27, and the timing belt is coupled to the cylinders 21 and 22 to rotate the timing belt, whereby the outer frame 1 a held by the holder 24 is held. May be transferred to the first recovery stage E, and the transfer means of the outer frame 1a is not limited to this embodiment.

Next, a voltage application means for applying a voltage to the outer frame 1a of the iron plate 1 and the templates 2a to 2d will be described. In FIG. 2, reference numeral 40 denotes a moving device, which includes an X table 41 and a Y table 42 that are orthogonal to each other. A head 43 is held at the tip of the Y table 42, and a rod 44 is vertically provided on the head 43. A disk-shaped first electrode 45 is attached to the lower end of the rod 44. Further, as described above, the holder 24 is grounded by the ground wire 25 so that the holder 24 serves as a second electrode having 0 potential. Motors 46 and 47 are attached to the X table 41 and the Y table 42, respectively. Although not shown, the X table 41 and the Y table 42 have built-in feed screws and nuts that are driven by the motors 46 and 47 to rotate.

When the motor 46 is driven, the Y table 42 moves in the X direction along the X table 41, and when the motor 47 is driven, the head 43 moves in the Y direction along the Y table 42. Therefore, by driving the motors 46 and 47, the first electrode 45 provided on the head 43 can be horizontally moved in the X direction and the Y direction. As shown in FIG. 3, the first electrode 45 moves above the iron plate 1 held by the holder 24 in the X direction and the Y direction. However, in FIG. The position is shifted backwards.

FIG. 6 shows a means for moving the first electrode 45 up and down, which is built in the head 43, in order to cause the first electrode 45 to move in and out of the templates 2a to 2d. A lever 52 is pivotally attached to the upper end of the rod 44 via a hinge 51. The lever 52 is rotatably attached to the pin 53 in the vertical direction, and a cam follower 54 is rotatably attached to the rear end of the lever 52. The cam follower 54 is in contact with the peripheral surface of the cam 55. The lever 52 is biased clockwise by a spring 56 so that the cam follower 54 contacts the peripheral surface of the cam 55. The cam 55 is attached to a rotary shaft 58 that is driven by a motor 57 to rotate. The rod 44 is held by a guide portion 59 so as to be vertically movable. Reference numeral 60 denotes a power supply cord for applying a voltage to the second electrode 45, which is connected to a power supply circuit 79 (described later).

Therefore, when the cam 55 is driven by the motor 57 to rotate, the lever 52 swings up and down about the pin 53, and the rod 44 moves up and down. Here, when the rod 44 descends, the first electrode 45 comes into contact with the upper surfaces of the templates 2a to 2d (see the chain line in FIG. 6), whereupon a voltage is applied to the first electrode 45. When the rod 44 moves up, the first electrode 45 floats away from the templates 2a to 2d, as shown by the solid line in FIG.

FIG. 7 is a block diagram of the control circuit. Reference numeral 70 denotes a computer control unit such as a CPU. The control unit 70 reads the data registered in the NC tape 71 provided in the punching machine B and the data registered in the program memory 72 and the frame memory 73 to perform necessary calculations, and the frame memory 73 needs to read the data. Writing necessary data, and further controlling the drivers 74, 75, 76, 77, 78 of the motors 18, 30, 46, 47, 57, the cylinders 21, 22 and the power supply circuit 79 of the first electrode 45. To do.

On the NC tape 71, punching position data for punching the slit 3 is registered. In the frame memory 73, the number of templates 2a to 2d separated from the outer frame 1a and accumulated on the table 11 is registered. Position data for landing the first electrode 45 at a predetermined position on the templates 2a to 2d may be registered in the NC tape 71 or the program memory 72, or an NC tape may be registered. The control unit 70 calculates data necessary for position control of the first electrode 45 based on the position data of the templates 2a to 2d registered in advance in 71, and based on this, the motors 46, 47 of the moving device 40 are calculated. Alternatively, the drivers 76 and 77 may be controlled.

Alternatively, a camera is provided between the punching machine B and the fusing device D, and the iron plate 1 is observed by this camera to detect the positions of the characteristic portions of the shape of the iron plate 1, such as the corners and the micro joints 4, Based on the detected position of the characteristic portion, a position for landing the first electrode 45 on the template 2a to 2d is obtained, and the drivers 76 and 77 of the motors 46 and 47 may be controlled based on the result. . As a method for detecting the position of the characteristic portion, there are image processing methods such as a pattern matching method and a contour tracking method (Border Following). As described above, various concrete position control methods for the first electrode 45 can be considered.

The iron plate punching system is configured as described above. Next, the overall operation will be described. In FIG. 1, the iron plate 1 is sent from the stocker A to the punching machine B, and the punching machine B punches and forms the slits 3 along the templates 2a to 2d, leaving the micro joints 4. The punching machine B has an NC tape 71 for controlling this, and automatically punches a predetermined position of the iron plate 1 based on the data registered in the NC tape 71.

Next, the iron plate 1 is sent to the fusing device D of the micro joint by the conveyor C. 2 and 3 are a perspective view and a front view of the fusing device D during fusing the micro joint 4. The outer frame 1a of the iron plate 1 is held by a holder 24 which is a second electrode, and is grounded through rods 21a and 22a of cylinders 21 and 22 and a ground wire 25.

Then, by driving the motors 46 and 47 of the moving device 40, the head 43 horizontally moves in the X direction and the Y direction, and one of the four template plates 2a to 2d (for example, the template plate 2a to 2d). It is located above the template 2a). Next, when the motor 57 (FIG. 6) is driven, the first electrode 45 descends and lands near the center of the template 2a.

Next, the power supply circuit 79 is driven to apply a voltage to the first electrode 45. Then, a current flows from the first electrode 45 to the micro joints 4 at the four corners of the template 2a (see broken line arrows in FIGS. 4 and 5). Here, the width of the neck portion 4a of the micro joint 4 is about 0.3 mm, which is extremely narrow, and a large current flows intensively there, so that all the neck portions 4a are momentarily heated by the resistance heat. Fused. According to the experimental results of the present inventor, when a voltage of 3 V is applied to the first electrode 45, a large current of 2000 amperes or more flows in the neck detail 4a, and the neck of the micro joint 4 having a thickness of about 2 to 5 mm. The detail 4a could be melted instantaneously. Also, when a plurality of iron plates 1 having such a thickness were stacked and a voltage was applied in the same manner, all the micro joints could be fused at the same time. Of course, the larger the voltage and the longer the voltage application time, the greater the fusing force.

One template is joined to the outer frame 1a by a plurality (usually 3 to 4 or more) of micro joints 4. According to this fusing device D, it is shown by a broken line arrow in FIG. As described above, a large current flows intensively toward the plurality of micro joints 4, so that the plurality of micro joints 4 can be melted instantaneously at the same time.

Here, in order to generate the same amount of resistance heat in each of the micro joints 4 so as to melt all the micro joints 4 uniformly, the first electrode 45 is connected to each micro joint 4 from each micro joint 4. It is desirable to land at equidistant positions as much as possible. Specifically, in FIG. 4, in the case of a square template 2a, it is desirable to land on the center of the template 2a as shown in the figure. It can be blown out uniformly by applying an equal amount of large current. Therefore, by controlling the motors 46 and 47 of the moving device 40 by the above-mentioned method, the first electrode 45 is landed at a predetermined position on the template. In FIG. 4, the first electrode 45 indicated by a chain line is in a state of being landed on the other template 2b to 2d at a position where the distances to the respective micro joints 4 are as equal as possible.

When the first electrode 45 is lowered and landed on the upper surfaces of the mold plates 2a to 2d, the lower surface of the first electrode 45 and the upper surfaces of the mold plates 2a to 2d are not perfect planes but slight concaves. Since there is a protrusion, the first electrode 45 first comes into point contact with the upper surfaces of the mold plates 2a to 2d, and then comes into surface contact by being strongly pressed against the upper surfaces of the mold plates 2a to 2d, but is grounded like point contact. When a voltage is applied in a small area, a large current concentrates on minute point contact parts, and the contact resistance locally generates heat, resulting in spot-like traces on the upper surfaces of templates 2a to 2d. Will end up.

Therefore, a detecting means is provided for detecting that the first electrode 45 is grounded on the upper surfaces of the templates 2a to 2d, and after detecting the landing by this detecting means, it takes some time (for example, 0.1 seconds). ) Has passed, that is, after the first electrode 45 is sufficiently in surface contact with the upper surfaces of the templates 2a to 2d, it is desirable to apply the voltage. As such a detection means, a touch sensor or a means for detecting impedance change can be applied. In addition, after the motor 57 starts driving, the voltage may be applied after a certain period of time when the first electrode 45 is considered to be in surface contact with the templates 2a to 2d firmly, and thus temporal control may be performed. .

When the micro joint 4 is fused as described above, the template 2a is completely separated from the outer frame 1a and naturally falls. In this case, as shown in FIG. 3, there is a table 11 below the iron plate 1, and therefore the template 2a that has naturally dropped falls on the table 11 and stacks in an orderly manner as shown in FIG. If the falling distance of the template 2a is long, the template 2a may be scattered to the side by the impact at the time of landing and may be scattered in the vicinity. Therefore, the motor 18 is driven to adjust the height of the table 11 to adjust the fall distance.

Once the micro joints 4 of the template 2a are melted as described above, the micro joints 4 of the other template 2b to 2d are melted in the same manner. When the melting of the micro joints 4 of all the template plates 2a to 2d is completed, the motor 30 is driven in FIG. 2 while the outer frame 1a is held by the holder 24 to drive the first cylinder 21 and the second cylinder 2a. The cylinder 22 is moved above the base plate 33 of the first recovery stage E. When the rods 21a and 22a of the cylinders 21 and 22 are pulled in, the holder 24 is retreated to the side to release the holding state of the outer frame 1a, and the remains after the templates 2a to 2d are separated. The outer frame 1 a drops and accumulates on the base plate 33. In FIG. 2, reference numeral 19 is an opening after the template plates 2a to 2d are removed. Next, the cylinders 21 and 22 are returned to their original positions by driving the motor 30 in the opposite direction. After that, the above-mentioned operation is repeated.

When a large number of template plates 2a to 2d are accumulated on the table 11 by repeating the above-mentioned fusing, the template plates 2a to 2d on the table 11 are transferred to the second recovery stage F (. Collect in Figure 1). In this case, since the template plates 2a to 2d are gathered on the table 11 in an orderly manner without being scattered, it is not necessary to sort the template plates 2a to 2d by type as in the conventional means described above. The template plates 2a to 2d on the table 11 may be transferred to the second recovery stage F as they are. This transfer work may be carried out manually, or a transfer means may be provided to transfer automatically.

The present invention is not limited to the above-described embodiment. For example, a plurality of first electrodes 45 may be provided and a plurality of template plates 2a to 2d may be simultaneously brought into contact with each other to simultaneously melt and cut. Further, in the above-described embodiment, since the motor 30 is driven to move the iron plate 1 in the X direction along the guide rail 29, the X table 41 of the moving device 40 is removed to remove the first electrode 45. May be movable only in the Y direction, or the first electrode 45 may be fixed and the iron plate 1 may be moved in the X direction or the Y direction. The electrode 45 may be relatively moved in the X direction and the Y direction so as to be brought into contact with the predetermined template 2a to 2d.

Further, the first electrode 45 is fixed at a constant height, and the iron plate 1 held by the holder 24 is moved up and down to bring the first electrode 45 into contact with the template plates 2a to 2d. Good. Alternatively, the first electrode 45 may be grounded with an earth wire and a voltage may be applied to the holder 24, which is the second electrode, and the first electrode 45 or the second electrode 24 is not limited to the DC voltage. Alternatively, an AC voltage may be applied. Further, in the above-mentioned embodiment, the holder 24 also serves as the second electrode, but the second electrode may be provided separately from the holder 24. Thus, the present invention can be modified in various ways.

[0038]

[Effect of device]

 As described above, according to the present invention, the template 2a, 2d and the outer frame 1a are brought into contact with the first electrode 45 and the second electrode 24 to apply a voltage, whereby the template 2a is easily operated. The plurality of micro joints 4 connecting the 2d to the outer frame 1a can be automatically fused at the same time without any difficulty. Further, by moving the first electrode 45 horizontally relative to the iron plate 1 based on the data registered in the memory such as the NC tape 71 provided in the punching machine B, the first electrode 45 is moved. The molds 2a to 2d can be brought into contact with each other at predetermined positions, and an equal amount of large current can be applied to the plurality of microjoints 4 to uniformly melt them.

[Brief description of drawings]

FIG. 1 is a plan view showing the overall configuration of an iron plate punching system according to an embodiment of the present invention.

FIG. 2 is a perspective view of a fusing device for a micro joint of an iron plate according to an embodiment of the present invention.

FIG. 3 is a front view of a fusing device for a micro joint of an iron plate according to an embodiment of the present invention.

FIG. 4 is a plan view of a holding state of an iron plate according to an embodiment of the present invention.

FIG. 5 is a partially enlarged plan view of an iron plate according to an embodiment of the present invention.

FIG. 6 is a side view of the first electrode up-and-down moving means abutting on the iron plate template according to the embodiment of the present invention.

FIG. 7 is a block diagram of a control circuit of a fusing device for a micro joint of an iron plate according to an embodiment of the present invention.

[Explanation of symbols]

 B Punching Machine D Fusing Device for Micro Joint 1 Iron Plate 1a Outer Frame 2a to 2d Template 4 Micro Joint 24 Holder (Second Electrode, Holding Means) 40 Moving Device 45 First Electrode 70 Control Part 71 NC Tape

Claims (2)

[Scope of utility model registration request] 1. A first electrode 45, which abuts on the mold plates 2a to 2d of an iron plate 1 in which the mold plates 2a to 2d are punched and formed by a punching machine B, leaving the micro joints 4,
The second electrode 24 that abuts the outer frame 1a of the iron plate 1, the moving device 40 that moves the first electrode 45 in the horizontal direction relative to the iron plate 1, and the first electrode 45 In order to bring the template plates 2a to 2d into contact with predetermined positions,
And a controller 70 that controls the moving device 40 based on the position data registered in the memory 71. 2. The micro joint of an iron plate according to claim 1, wherein the memory 71 is an NC tape which is provided in the punching machine B and in which punching position data of the templates 2a to 2d is registered. Fusing device.