JPH09155637A - Tapping device and punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent application of tapping machining or punching machining on a clamp device and to suppress the damage to a tap or a punch. SOLUTION: An insulation tip 31 is arranged on the upper side of the tip part of a clamp device 21 through an insulation member 57 situated below a work press member 53. When the work press member 53 is lowered, and a continuity detector 93 is provided to detect electrical continuity of a conductive member 59 to a the clamp device 21 through a metallic sheet when the work press member 53 is lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping device for tapping the inside of a hole in a metal plate from below, and a punching device for punching a portion to be processed in the metal plate.

[0002]

2. Description of the Related Art A conventional tapping device for tapping the inside of a hole in a metal plate from below by rotating and raising the tap will be described. The frame of the tapping device is provided with a work supporting member capable of supporting the peripheral edge portion of the hole on the lower surface of the metal plate, and the work supporting member is provided with a tap through hole through which the tap can pass. A work pressing member that presses the peripheral portion of the hole in the metal plate from above is provided at a position vertically opposed to the work supporting member in the frame so as to be able to move up and down. Then, in order to position a hole in the metal plate at a predetermined position between the work supporting member and the work pressing member, a clamp device for clamping the end portion of the metal plate is provided in the frame so as to be movable in the front-back and left-right directions.

Next, a conventional punching device for punching a work portion of a metal plate by cooperation of a punch and a die will be described. An upper support member and a lower support member are provided to face each other vertically on a frame of the punching device, and the lower support member includes the die. The upper support member is provided with a vertically movable punch guide that supports the punch so that the punch guide is provided with an annular work pressing portion that presses the peripheral edge of the processed portion of the metal plate from above. There is. A lifter spring capable of urging the punch guide upward with respect to the upper support member is provided, and the punch guide can be urged upward with respect to the punch guide and is larger than the urging force of the lifter spring. A stripper spring having a biasing force is provided. Then, in order to position the processed portion of the metal plate at a predetermined position between the punch and the die, a clamp device for clamping the end portion of the metal plate is provided on the frame so as to be movable in the front-back and left-right directions.

[0004]

In the conventional tapping device and punching device, NC is generally used.
By inputting processing information to the control device such as the device, the clamping device is moved forward and backward, left and right based on the processing information, while the metal plate is moved and positioned, while tapping or punching is performed. There was a problem. That is, if there is an input error of the processing information or the processing information is inappropriate, tapping processing is performed under the condition that a part of the clamp device is located between the tap and the work pressing member, Alternatively, there is a problem in that the punching process is performed while a part of the clamp device is located between the punch and the die, thereby damaging the clamp device and the tap or the punch.

[0005]

In order to solve the above-mentioned conventional problems, in the present invention, as the first means, the tap is raised while rotating so that the inside of the hole in the metal plate is On the other hand, in a tapping device for performing tapping from below, a work supporting member capable of supporting the peripheral edge of the hole on the lower surface of the metal plate is provided, and the work supporting member is provided with a tap through hole through which the tap can penetrate, A work pressing member that presses the peripheral edge of the hole in the metal plate from above is provided at a position facing the work supporting member in the vertical direction so that the work pressing member can be moved up and down, and a conductive member is provided below the work pressing member via an insulating member. The conductive member is provided with a tap entrance passage into which the tap can enter, and the metal in order to position the hole in the metal plate at a predetermined position between the work supporting member and the work pressing member. A clamp device for clamping the end part of the clamp device is provided so as to be movable in the horizontal direction, an insulating chip is provided on the upper side of the tip end part of the clamp device, and when the work pressing member is lowered, the conductive member passes through the metal plate. The present invention is characterized in that a conduction detector for detecting conduction to the clamp device is provided. Here, the tap may be configured to move up and down in association with the rotation by the action of the lead screw, and the work supporting member may be configured to move up and down.

As a second means, in addition to the constituent features of the first means, when the work pressing member is lowered, it is not detected that the conductive member is electrically connected to the clamp device via a metal plate. And a control device for controlling the rising of the tap to be stopped.

As a third means, in addition to the constituent features of the first means, when the work pressing member is lowered, it is not detected that the conductive member is electrically connected to the clamp device through the metal plate. A control device for controlling to generate an alarm is provided.

As a fourth means, in a punching apparatus for punching a work part of a metal plate by cooperation of a punch and a die, an upper supporting member and a lower supporting member provided with the die are vertically moved. A punch guide that is provided so as to face each other and that supports the punch so as to be able to move up and down is provided so as to be able to move up and down, and an annular work pressing portion that presses the peripheral edge of the processed portion of the metal plate from above is provided on the punch guide. A lifter spring capable of urging the punch guide upward with respect to the upper support member, and capable of urging the punch upward with respect to the punch guide and having a force larger than the urging force of the lifter spring. A stripper spring having a force is provided, and a conductive member is provided below the work pressing portion via an insulating member, and a punch can penetrate the conductive member. A punch through passage is provided, a striker for pressing the punch from above is provided above the upper support member so as to be able to move up and down, and a work portion of the metal plate is positioned at a predetermined position between the punch and the die. A clamp device for clamping the end portion is provided so as to be movable in the horizontal direction, an insulating tip is provided on the upper end portion of the clamp device, and when the punch guide is lowered against the urging force of the lifter spring, the conductive member is provided. Is provided with a conduction detector for detecting that the electricity has been conducted to the clamp device via the metal plate.

As a fifth means, in addition to the constituent features of the fourth means, when the punch guide is lowered against the urging force of the lifter spring, the conductive member causes the metal plate to intervene. It is characterized in that a control device is provided for controlling so as to stop the descending drive of the striker when it is not detected that the clamp device is electrically connected.

As a sixth means, in addition to the constituent features of the fourth means, when the punch guide is lowered against the urging force of the lifter spring, the conductive member causes the metal plate to intervene. It is characterized in that a control device is provided for controlling so as to generate an alarm when it is not detected that the clamp device is electrically connected.

According to the first to third means, the clamp device is moved in the horizontal direction to position and move the metal plate while the end portion of the metal plate is clamped by the clamp device. The hole in the metal plate is positioned at a predetermined position between the work supporting member and the work pressing member. Next, by lowering the work pressing member, the peripheral edge of the hole in the metal plate is pressed from above.

At this time, when the conduction detector detects that the conductive member is conducted to the clamp device through the metal plate, the conductive member and the upper surface of the metal plate are in contact with each other, and the tap and the work pressing member are not in contact with each other. It will be seen that no part of the clamping device is located in between. Then, in this case, the tapping process is performed from below on the inside of the hole in the metal plate by rotating and raising the tap.

On the other hand, if the conduction detector does not detect that the conductive member is conducted to the clamp device through the metal plate, the conductive member and the insulating chip are in contact with each other, and the clamp device is provided between the tap and the work pressing member. It can be seen that a part of is located. And in this case,
According to the second means, the control device controls the tap to stop rising, and according to the third means, the control device controls to generate an alarm.

According to the fourth to sixth means, the clamp device is moved in the horizontal direction to position and move the metal plate while the end of the metal plate is clamped by the clamp device. The processed part of the metal plate is positioned at a predetermined position between the punch and the die. Next, by pressing the punch from above by lowering the striker,
The punch guide is lowered against the urging force of the lifter spring, and the work pressing portion presses the peripheral portion of the processed portion of the metal plate from above.

At this time, when the conduction detector detects that the conductive member is conducted to the clamp device through the metal plate, the work pressing portion and the upper surface of the metal plate are in contact with each other, and the gap between the punch and the die is large. It can be seen that a part of the clamping device is not located at. Then, in this case, by further lowering the striker, the punch is lowered with respect to the punch guide while resisting the biasing force of the stripper spring, and the punch and die cooperate with each other to form a processed portion on the metal plate. On the other hand, punching is performed.

On the other hand, when the conduction detector does not detect that the conductive member is conducted to the clamp device through the metal plate, the conductive member is in contact with the insulating chip and a part of the clamp device is present between the punch and the die. You can see that it is located. In this case, the fifth means controls the controller to stop the striker from descending, and the sixth means controls the controller to generate an alarm.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 and 3, the multi-tasking machine 1 includes a tapping processing portion 3 for tapping the inside of a hole H in a metal plate W and a punching processing for a portion to be processed in the metal plate W. A punching processing unit 5 for performing (including punching processing and the like) is provided. Further, the multi-tasking machine 1 is based on a bridge-type main body frame 7, and the main body frame 7 is provided with an upper frame 9 and a lower frame 11 which are vertically opposed to each other. The lower frame 11 is provided with a fixed table 13 extending in the front-rear direction (right-left direction in FIG. 1, downward-upward direction in FIG. 3), and the left and right of the fixed table 13 in the lower frame 11 (front and back faces in FIG. A pair of movable tables 15 are provided on both sides (left and right in FIG. 3) so as to be movable in the front-rear direction.

A plate material positioning device 17 for moving and positioning the metal plate W with respect to the tapping processing section 3 or the punching processing section 5 is provided. That is, the upper frame 9 is provided with a carriage base 19 extending in the left-right direction and connected to the pair of movable tables 15 so as to be movable in the front-rear direction.
The carriage 2 is provided with a plurality of clamp devices 21 for clamping the front end of the metal plate W on the carriage base 19.
3 is provided so as to be movable in the left-right direction. Here, each clamp device 21 includes a lower jaw 25 and the lower jaw 2
5, an upper jaw 27 slidable in the vertical direction, and an abutting member 29 provided between the upper jaw 27 and the lower jaw 25 and capable of abutting the front end surface of the metal plate W. An insulating tip 31 is provided on the upper end of the upper jaw 27.

The tapping portion 3 is for tapping the inside of the hole H in the metal plate W from below by raising the tap 33 while rotating it. The details are as follows.

That is, a work supporting member 35 capable of supporting the peripheral portion of the hole H on the lower surface of the metal plate W is provided on the rear left side of the fixed table 13, and the tap 33 can penetrate the work supporting member 35. A tap through hole 37 is provided. Here, the work supporting member 35 can be moved up and down by the operation of a supporting member lifting cylinder (not shown). A tap holder 39 for holding the tap 33 is provided below the work supporting member 35 on the lower frame 11 via a guide member 41 so as to be vertically movable and rotatable. A lead screw 43 is screwed to the lower end of the tap holder 39 in order to rotate, move, and ascend and descend the tap holder 39. Further, the lead screw 43 is attached to the lower frame 11
It is also possible to move up and down without rotating by the operation of the holder lifting cylinder 45 provided at the appropriate position. And
In order to rotate the tap holder 39, the lower frame 11
Is provided with a rotary motor 49 having a drive gear 47, and the tap holder 39 has a holder lifting cylinder 45.
When the tap holder 39 is raised above a predetermined height position by the operation of, a driven gear 51 that can mesh with the drive gear 47 is provided.

A work pressing member 53 for pressing the peripheral edge of the hole H in the metal plate W from above is provided at a position vertically opposed to the work supporting member 35. The work pressing member 53 is provided on the upper frame 9. It is moved up and down by the operation of a pressing cylinder 55 provided at an appropriate position. A conductive member 59 is provided below the work pressing member 53 via an insulating member 57 made of urethane, for example, and the conductive member 59 is provided with a tap entry passage 61 into which the tap 33 can enter. The insulating member 57 also has a tap entry passage 63 through which the tap 33 can enter.

The punching portion 5 is for punching the portion to be processed of the metal plate W by the cooperation of the punch 65 and the die 67. The details of the construction are as follows.

That is, referring to FIGS. 1 and 3, an upper turret 69 is rotatably provided on the upper frame 9.
A lower turret 71 having a plurality of dies 67 is provided rotatably in a circumferential direction at a position vertically opposed to the upper turret 69 on the lower frame 11. Upper turret 69
The lower turret 71 and the lower turret 71 rotate in synchronization with the driving of a turret servomotor (not shown), and the lower turret 71 is located at the rear of the fixed table 13. The upper turret 69 is provided with a plurality of punch guides 73 that can be raised and lowered in the circumferential direction, and each punch guide 73 supports the corresponding punch 65 so that it can be raised and lowered.
An annular work pressing portion 75 that presses the peripheral portion of the processed portion of the metal plate W from above is provided. Between the upper turret 69 and the upper ends of the punch guides 73, lifter springs 77 capable of urging the punch guides 73 upward with respect to the upper turret 69 are provided, and correspond to the upper ends of the punch guides 73. Between the upper ends of the punches 65, stripper springs 79 capable of urging the punch 65 upward with respect to the punch guide 73 and having a biasing force larger than the biasing force of the lifter spring 77 are provided. A conductive member 83 is provided below the work pressing portion 75 of each punch guide 73 via an insulating member 81, and each conductive member 83 is provided with a punch through passage 85 through which a corresponding punch 65 can penetrate. is there.
A punch through passage 87 through which the punch 65 corresponding to the insulating member 81 can penetrate is provided.

A striker 89 for pressing a predetermined punch 65 from above is provided above the upper turret, and this striker 89 moves up and down by the operation of a striker cylinder 91 provided at an appropriate position on the upper frame 9. It is a thing.

Referring to FIGS. 1 and 4, when the work pressing member 53 is lowered in the tapping section 3,
The conductive member 59 has the clamp device 21 via the metal plate W.
A first continuity detector 93 is provided for detecting the continuity of the electric field. The first continuity detector 93 has a conductive member 59 at one end.
And a switch 97, a power source 99, a coil 101 connected in series to the lead wire 95, and a parallel connection to the coil 101. And a first voltmeter 103. The first voltmeter 103 is connected to the control device 105, and when the work pressing member 53 is lowered, the conductive member 59 energizes the clamp device 21 via the metal plate W. If not done, the rotation motor 49 is controlled so that the tap 33 cannot be rotated (it does not move and rise due to the rotation), and the alarm generator 107 is controlled to generate an alarm. The other end of the lead wire 95 is connected to the upper frame 9
Instead of connecting to the appropriate position, it may be connected to the clamp device 21 or the carriage base 19 or the like.

Further, referring to FIGS. 2 and 4, when the punch guide 73 is lowered in the punching portion 5 against the biasing force of the lifter spring 77, the conductive member 81 is formed.
A second conduction detector 109 is provided for detecting that electricity has been conducted to the clamp device 21 via the metal plate W. This second
The continuity detector 109 has a lead wire 111 having one end connected to the conductive member 83 and the other end connected to an appropriate position of the upper frame 9, a switch 113 connected in series to the lead wire 111, a power supply 115, The coil 117 and the second voltmeter 119 connected in parallel to the coil 117 are provided. The second voltmeter 119 is connected to the control device 105. When the control device 105 has the above-described function, the punch guide 73 is lowered against the urging force of the lifter spring 77. In addition, the striker cylinder 91 is controlled so as to stop the descending drive of the striker 89, and the alarm generator 107 is controlled to generate an alarm.

Next, the operation of the embodiment of the present invention will be described.

By driving the turret servomotor to rotate the upper turret 69 and the lower turret 71 synchronously in the same direction, a predetermined punch 65 and a predetermined die 67 are positioned vertically below the striker 89. Further, while the front end portion of the metal plate W is clamped by the clamp device 21, the carriage base 19 is moved in the front-rear direction and the carriage 23 is moved in the left-right direction, so that the metal plate W is moved in the front-rear direction and the left-right direction. By moving and positioning in the direction, the processed portion of the metal plate W is positioned between the predetermined punch 65 and the predetermined die 67. Next, the striker 89 is lowered by the operation of the striker cylinder 91, and the predetermined punch 65 is pressed from above by the striker 89, whereby the punch guide 7 is pressed.
3 is lowered against the biasing force of the lifter spring 77, and the work pressing portion 75 presses the peripheral portion of the processed portion of the metal plate W from above.

At this time, when the second voltmeter 119 in the second conductivity detector 109 detects that the counter electromotive force is instantaneously generated in the coil 117, in other words, the second conductivity detector 109 causes the conductive member. When it is detected that 83 is energized to the clamp device 21 through the metal plate W, the work pressing portion 75 is in contact with the upper surface of the metal plate W and clamps between the predetermined punch 65 and the predetermined die 67. It can be seen that part of the device 21 is not located. Then, in this case, the striker 89 is further lowered by the operation of the striker cylinder 91, whereby the predetermined punch 65 is lowered with respect to the punch guide 73 while resisting the biasing force of the stripper spring 79. The punch 65 and a predetermined die 67 cooperate with each other to perform punching (an example of punching) on a portion to be processed in the metal plate W to form a hole H in the metal plate W.

On the other hand, if the second conductive detector 109 does not detect that the conductive member 83 is electrically connected to the clamp device 21 through the metal plate W, the conductive member 83 and the insulating chip 31 are not detected.
Are in contact with each other, and a predetermined punch 65 and a predetermined die 67
It can be seen that a part of the clamping device 21 is located in between. Then, in this case, the control device 107 controls the striker cylinder 91 so as to stop the descending drive of the striker 89, and the alarm generator 107 issues an alarm.

After forming the hole H in the metal plate W as described above, the metal plate W is moved and positioned in the front-rear and left-right directions under the condition that the front end of the metal plate W is clamped by the clamp device 21. , The hole H in the metal plate W is positioned between the work supporting member 35 and the work pressing member 53. Next, the work supporting member 35 is raised by the operation of the supporting member elevating cylinder, and the work supporting member 35 causes the metal plate W to move.
The peripheral portion of the hole H in FIG. Then, the work pressing member 53 is lowered by the operation of the pressing cylinder 55,
The work pressing member 53 presses the peripheral portion of the hole H in the metal plate W from above.

At this time, when it is detected by the first conductivity detector 95 that the conductive member 59 is electrically connected to the clamp device 21 through the metal plate W, the conductive member 59 is in contact with the upper surface of the metal plate W. It can be seen that a part of the clamp device 21 is not located between the tap 33 and the work pressing member 53. And in this case, the holder lifting cylinder 4
5, the tap holder 39 is raised to engage the driven gear 47 with the drive gear 51, and the tap motor 39 is driven to rotate the tap holder 39, thereby rotating the tap 33 in combination with the action of the lead screw 43. The inside of the hole in the metal plate W is raised and tapping processing is performed.

On the other hand, when it is not detected by the first conductivity detector 93 that the conductive member 59 is electrically connected to the clamp device 21 through the metal plate W, the conductive member 59 and the insulating chip 31 are in contact with each other, and the tap 33 is present. It can be seen that a part of the clamp device 21 is located between the work pressing member 53 and the work pressing member 53. In this case, the control device 105 controls the rotary motor 49 so that the tap holder 39 cannot be rotated, and the alarm generator 107 issues an alarm.

[0035]

According to the invention described in claim 1 or claim 2, tapping is performed under the condition that a part of the clamp device is located between the tap and the work pressing member. Alternatively, punching is not performed under the condition that a part of the clamp device is located between the punch and the die. Therefore, tapping or punching is not performed on the clamp device, and damage to the tap or punch can be suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a tapping processing unit.

FIG. 2 is a diagram showing a punching processing section.

FIG. 3 is a plan view of a compound number processing machine.

FIG. 4 is a plan view of a compound number processing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-tasking machine 3 Tapping machine 5 Punching machine 21 Clamping device 31 Insulating tip 33 Tap 35 Work support member 39 Tap holder 53 Work pressing member 57 Insulating member 59 Conductive member 65 Punch 67 Die 69 Upper turret 71 Lower turret 73 Punch guide 75 Work pressing part 77 Lifter spring 79 Stripper spring 81 Insulation member 83 Conductive member 93 First conduction detector 105 Second conduction detector

Claims (2)

[Claims] 1. A tapping device for performing tapping from below on the inside of a hole in a metal plate by raising the tap while rotating it, and supporting a work piece capable of supporting the peripheral edge of the hole on the lower surface of the metal plate. A member is provided, the work supporting member is provided with a tap through hole through which the tap can pass, and a work pressing member that presses the peripheral edge of the hole in the metal plate from above is vertically moved to a position facing the work supporting member in the vertical direction. A conductive member is provided below the work pressing member via an insulating member, and a tap entrance passage into which a tap can enter the conductive member is provided, and a metal is provided at a predetermined position between the work supporting member and the work pressing member. In order to position the holes in the plate, a clamp device that clamps the end of the metal plate is provided so that it can move in the horizontal direction. A punching device comprising an insulating chip and a conduction detector for detecting that the conductive member is electrically connected to the clamp device through the metal plate when the work pressing member is lowered. 2. A punching apparatus for punching a work part of a metal plate by cooperation of a punch and a die, wherein an upper support member and a lower support member including the die are provided to face each other vertically. A punch guide that supports the punch so that the punch can be moved up and down is provided on the upper support member so as to be able to move up and down, and the punch guide is provided with an annular work pressing portion that presses the peripheral edge of the processed portion of the metal plate from above. The stripper is provided with a lifter spring capable of biasing the guide upward with respect to the upper support member, and is capable of biasing the punch upward with respect to the punch guide, and has a biasing force larger than the biasing force of the lifter spring. A spring is provided, a conductive member is provided below the work pressing portion via an insulating member, and a punch through passage through which a punch can penetrate is provided in the conductive member. A striker that presses the punch from above is provided above the upper support member so that it can be moved up and down.
In order to position the part to be processed on the metal plate at a predetermined position between the punch and the die, a clamp device that clamps the end of the metal plate is provided so that it can move in the horizontal direction, and an insulating chip is provided on the upper end of the clamp device. And a conduction detector for detecting that the conductive member is electrically connected to the clamp device via the metal plate when the punch guide is lowered against the urging force of the lifter spring. Punching device.