JP3696660B2 - Punch press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of using a punch press capable of performing tapping on the inside of a processing hole in a plate material.
[0002]
[Prior art]
A conventional turret punch press will be described. An upper turret and a lower turret are vertically opposed to each other on the frame, and the upper turret and the lower turret can be rotated by driving a turret drive motor. The upper turret has a plurality of drilling upper molds and tapping upper molds that can be raised and lowered, and the lower turret has a plurality of drilling lower molds and tapping lower molds. Each is provided. A plurality of upper molds for drilling are respectively configured to be vertically opposed to the corresponding lower molds for drilling, and the upper mold for tapping is vertically opposed to the lower mold for tapping. It is configured. A striker that presses a predetermined upper die from above is provided at a position vertically above the upper turret in the frame. The striker moves up and down by the operation of a hydraulic cylinder or the rotation of a crankshaft.
[0003]
The upper mold for tapping processing is a mold sleeve provided on the upper turret so as to be movable up and down, a pressed member provided on the upper side of the mold sleeve so as to be movable up and down and pressed from above by the striker, An annular workpiece pressing member that is provided below the mold sleeve and presses the peripheral edge of the processing hole in the plate material from above, and is moved up and down while rotating by raising and lowering the pressed member that is provided in the mold sleeve. Has a tap.
[0004]
Therefore, the plate material is positioned at a predetermined position between the upper turret and the lower turret. Further, the upper turret and the lower turret are rotated so that the predetermined drilling upper mold and the predetermined drilling lower mold are positioned at the vertically lower position of the striker. Then, by lowering the striker and pressing the predetermined drilling upper mold from above, the predetermined upper and lower molds cooperate to drill the plate material. To form a processed hole.
[0005]
After drilling the plate material, the upper turret and the lower turret are rotated so that the upper and lower molds for tapping are positioned vertically below the striker. Position between the upper mold for cutting and the lower mold for tapping. Then, by lowering the striker and pressing the pressed member from above, the entire upper die for tapping is lowered, and the peripheral portion of the processing hole in the plate material is moved by the work pressing member in the upper die for tapping. Press from above.
[0006]
After the work pressing member presses the peripheral edge of the processed hole in the plate material, the striker is further lowered to lower the pressed member relative to the mold sleeve. Thereby, the tap is lowered while rotating, and the tapping process is performed on the inside of the processing hole.
[0007]
[Problems to be solved by the invention]
By the way, if tapping is performed many times on the plate material, the tap may be broken. In such a case, although the tapping is not actually performed, the next processing (drilling processing or There is a problem that the operation efficiency of a series of processes (a plurality of drilling processes and a plurality of tapping processes) deteriorates and the punch press cannot be automatically operated.
[0008]
[Means for Solving the Problems]
In order to solve the conventional problems as described above, in the present invention, an upper mold holder and a lower mold holder are provided vertically opposite to each other, and an upper mold for tapping is moved up and down on the upper mold holder. The lower mold holder is provided with a lower mold for tapping processing facing the upper mold for tapping processing vertically, a striker is provided at a position vertically above the upper mold holder, and the upper mold for tapping processing is provided. The mold includes a mold sleeve provided in the upper mold holder so as to be movable up and down, a member to be pushed up and down on the upper side of the mold sleeve and pressed from above by the striker, and the mold sleeve An annular work pressing member that is provided on the lower side and presses the peripheral edge of the processing hole in the plate material from above, and is provided in the mold sleeve and is moved up and down by the pressed member It and a tap for rolling while being lifting, constituted by electrically insulating the mold sleeve and the upper mold holder, the portion in contact with at least the workpiece pressing member workpiece is constituted by electrically insulating material, tapping In the method of using a punch press provided with an energization detection device for detecting that the upper mold for processing and the lower mold for tapping are energized through the plate material ,
After lowering the striker and pressing the pressed member from above, the entire upper mold for tapping is lowered and the work pressing member presses the peripheral edge of the processing hole in the plate material from above. ,
By further lowering the striker and lowering the pressed member relative to the mold sleeve, when lowering the tap while rotating,
When it is detected that the upper mold for tapping and the lower mold for tapping are energized through the plate material by the energization detection device, it is determined that there is no tap breakage, while the upper mold for tapping by the energization detection device. If it is not detected that the lower mold for tapping is energized through the plate material, it is determined that there is a tap break 3.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment concerning the present invention is described based on a drawing.
[0010]
Referring to FIG. 3, a turret punch press 1 as an example of a punch press is based on a bridge-type main body frame 3. The main body frame 3 has an upper frame 5 and a lower portion opposed to each other in the vertical direction (up and down in FIG. 3). A frame 7 is provided. A fixed table (not shown) for supporting the plate material W is provided on the upper surface of the lower frame 7, and a pair of movable tables 9 are provided on the left and right sides (front and back in FIG. 3) of the fixed table in the front-rear direction (right and left in FIG. 3). Direction).
[0011]
A plate material positioning device 11 is provided for positioning the plate material W to be punched. That is, a carriage base 13 constituting a part of the plate material positioning device 11 is fixed to the left and right movable tables 9, and a carriage 17 having a clamp device 15 for holding the plate material W is provided on the carriage base 13. It is mounted so that it can move in the left-right direction.
[0012]
An upper turret 19 is rotatably provided at a rear portion of the upper frame 5 via a rotation shaft 21, and a lower turret 23 vertically opposed to the upper turret 19 on the front side of the fixed table in the lower frame 7 has a rotation shaft 25. It is provided so that it can rotate through. The upper turret 19 and the lower turret 23 rotate synchronously by driving a turret servomotor (not shown).
[0013]
The upper turret 19 is provided with a plurality of drilling upper molds 27 and tapping upper molds 29 that can be moved up and down, respectively. A lifter spring 31 (see FIG. 1) is provided. The lower turret 23 is provided with a plurality of drilling lower molds 33 and tapping lower molds 35, and the plurality of drilling upper molds 27 correspond to the corresponding drilling lower molds 33. The tapping upper die 29 is opposed to the tapping lower die 35 vertically.
[0014]
A hydraulic cylinder 39 having a piston rod 37 movable in the vertical direction is provided at a position vertically above the upper turret 19 in the frame 5, and predetermined upper molds 27 and 29 are moved upward in the piston rod 37. The striker 41 which presses from is connected.
[0015]
Referring to FIG. 1, a limit switch 43 is provided at an appropriate position of the upper frame 5 in order to detect that the striker 41 is located near the lower limit position, and an appropriate position of the piston rod 37 is provided. A dog 45 for operating the limit switch 43 is provided. That is, between the time when the dog 45 operates the limit switch 43 due to the lowering of the piston rod 37 and the time when the dog 45 operates the limit switch 43 again due to the upward movement of the piston rod 37, the striker 41 is in the vicinity of the lowest limit position. You can see that it is located. Here, the vicinity of the lowest limit position is from the height position of the striker 41 when the workpiece pressing member described later in the upper mold 29 for tapping starts to come into contact with the peripheral edge of the machining hole Wh of the plate material W by the lowering of the striker 41. Is also low.
[0016]
In order to move the striker 41 up and down, instead of providing the hydraulic cylinder 39, a crankshaft that can be driven to rotate is provided on the upper frame 5, and the striker 41 may be rotatably connected to an eccentric portion of the crankshaft. Further, in this case, it is easily understood that the striker 41 is located near the lowest limit position by detecting the rotation position of the crankshaft by a proximity sensor or the like.
[0017]
The details of the upper mold 29 for tapping will be described. An appropriate mold mounting hole 19h in the upper turret 19 is provided so that a mold sleeve 47 can be moved up and down. The mold sleeve 47 includes a sleeve body 49, A sleeve head 51 provided integrally with the upper portion of the sleeve main body 49 is provided. A pressed member 53 that is pressed from above by the striker 41 is provided on the sleeve head 51 of the mold sleeve 47 so as to be movable up and down via a plurality of guide bars 55, and below the guide bar 55 inside the sleeve head 51. Is provided with a gas spring 57. An annular work pressing member 59 is provided below the sleeve body 49 in the mold sleeve 47 to press the peripheral edge of the processing hole Wh in the plate material W from above.
[0018]
A tap 61 is provided in the mold sleeve 47, and the tap 61 moves up and down while rotating as the pressed member 53 moves up and down. That is, the upper end portion of the feed screw 63 is rotatably connected to the pressed member 53, and a nut member 65 to which the feed screw 63 is screwed is fixed at an appropriate position of the sleeve head 51. A spline shaft 67 is integrally provided at the lower portion of the feed screw 63, and a lifting / lowering rotary body 71 integrally provided with a collet chuck 69 for holding a tap 65 is spline-fitted to the spline shaft 67. A lead screw 73 is formed outside the ascending / descending rotator 71, and a nut member 75 screwed to the lead screw 73 of the ascending / descending rotator 71 is fixedly provided at an appropriate position in the sleeve main body 49. Here, the pitch and lead of the lead screw 73 of the lifting rotary body 71 are the same as the pitch and lead of the tap 61, and the lead of the lifting rotary body 71 is smaller than the lead of the feed screw 63.
[0019]
The portion 49a in contact with the upper turret 19 in the sleeve main body 49 and the portion 59a in contact with the workpiece W in the workpiece pressing member 59 (annular) 59a are made of an electrically insulating material such as urethane or MC nylon. The entire sleeve body 49 or the entire workpiece pressing member 59 may be made of an electrically insulating material. Instead of forming a part or all of the sleeve body 49 with an electrically insulating material, the sleeve body 49 in the upper turret 19 may be Only the contact portion may be made of an electrically insulating material.
[0020]
An energization detecting device 77 for detecting that the upper mold 29 for tapping and the lower mold 35 for tapping are energized through the material W is provided at an appropriate position. A tip end of a first cord 79 having a base end connected to the energization detecting device 77 is connected to a piston rod 37 in the hydraulic cylinder 39, and a tip end of a second cord 81 having a base end connected to the energization detecting device 77 is connected. Connected to the lower turret 23.
[0021]
The tip of the first cord 79 may be connected to the striker 41 or the mold sleeve 47 (except for the portion made of an insulating material) instead of the piston rod 37, and the tip of the second cord 81 is connected to the lower portion. Instead of the turret 23, it may be connected to a lower mold 35 for tapping.
[0022]
A control device 83 shown in FIG. 2 is connected to the energization detection device 77, and this control device 83 detects the energization when the striker 41 presses the pressed member 53 and is positioned near the lowest limit position. If it is not detected by the device 77 that the upper mold 29 for tapping and the lower mold 35 for tapping are energized, the whole turret punch press 1 is controlled to stop moving or generate an alarm. Has an effect. Instead of stopping the operation of the entire turret punch press 1, the lowering drive of the striker 41 may be stopped.
[0023]
Next, a method for using the turret punch press 1 (a method for using the punch press) will be described.
[0024]
While holding the plate material W by the clamp device 15, the carriage 17 is moved in the left-right direction and the carriage base 13 is moved in the front-rear direction integrally with the movable table 9, whereby the plate material W is moved to the upper turret 19 and the lower turret. 23 is positioned at a predetermined position. Further, the upper turret 19 and the lower turret 23 are rotated so that the predetermined drilling upper mold 27 and the predetermined drilling lower mold 33 are positioned vertically below the striker 41. Then, the striker 41 is lowered by driving the hydraulic cylinder 39 and the predetermined drilling upper mold 27 is pressed from above, so that the predetermined drilling upper mold 27 and the lower mold 33 are cooperated. It is possible to perform drilling on the plate material W to form the processed hole Wh. Here, when the plate thickness of the plate material W is thin, burring is performed simultaneously with drilling, or burring is performed after drilling.
[0025]
After drilling (including burring when burring is performed) on the plate material W, the upper turret 19 and the lower turret 23 are rotated so that the upper mold 29 and the lower mold 35 for tapping are rotated. By positioning the striker 41 at a vertically lower position, the processing hole Wh in the plate material W is relatively positioned between the upper mold 29 and the lower mold 35 for tapping. Then, by lowering the striker 41 and pressing the pressed member 53 from above, the entire upper mold 29 for tapping is lowered against the urging force of the lifter spring 31, and the plate material is pressed by the work pressing member 59. The peripheral edge of the processed hole Wh in W is pressed from above.
[0026]
After the work pressing member 59 presses the peripheral edge of the processing hole Wh in the plate material W, the striker 41 is further lowered so that the pressed member 53 is against the urging force of the gas spring 57 against the mold sleeve 47. Lower relatively. As a result, the feed screw 63 and the spline shaft 67 are rotated, and the tap 61 is lowered while rotating integrally with the elevating rotary body 71 by the action of the lead screw 33, and tapping is performed on the inner side of the processing hole Wh. Do.
[0027]
At this time, if the tap 61 is not broken, if the energization detecting device 75 detects that the upper mold 29 for tapping and the lower mold 35 for tapping are energized through the plate material W , the tap breaks. It is determined that there is no . On the other hand, if it is not detected by the energization detection device 75 that the upper mold 29 for tapping and the lower mold 35 for tapping are energized through the plate material W, the tap 61 may be broken ( if there is a tap fold). And the control device 83 is controlled to stop the operation of the entire turret punch press 1 or generate an alarm.
[0028]
According to the present embodiment as described above, when the tap 61 is broken, it can be determined during the tapping process, and once the tapping process is interrupted, the punch press 1 is automatically operated. A series of processing can be performed, and the work efficiency of the series of processing can be improved by appropriately replacing the tap 61.
[0029]
【The invention's effect】
According to the first aspect of the present invention, when the tap is broken, it can be determined during the tapping process, and once the tap process is interrupted, a series of operations are performed by the automatic operation of the punch press. It is possible to perform the processing, and it is possible to improve the work efficiency of a series of processing by appropriately replacing the tap.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a main part of an example of an embodiment.
FIG. 2 is a control block diagram according to an example of the present embodiment.
FIG. 3 is a side view of the turret punch press.
[Explanation of symbols]
1 Turret punch press 19 Upper turret 23 Lower turret 27 Upper mold for drilling 29 Upper mold for tapping 33 Lower mold for drilling 35 Lower mold for tapping 41 Striker 43 Limit switch 47 Mold sleeve 53 Pressed member 59 Work pressing member 61 Tap 77 Energization detection device 83 Control device

Claims (1)

Opposed upper mold holder and the lower die holder vertically on the frame, provided with vertically movable a tapping for the upper mold to the upper mold holder, tapping the tapping for the lower mold to the lower mold holder A mold sleeve provided on the upper mold holder so as to be vertically opposed to the upper mold holder, and provided with a striker at a position vertically above the upper mold holder. A member to be pressed that can be moved up and down on the upper side of the mold sleeve and pressed from above by the striker, and a peripheral portion of a processing hole that is provided on the lower side of the mold sleeve and that is formed on the plate material. an annular workpiece pressing member for pressing the, and provided in the mold sleeve made and a tap for lifting while rotating the lifting of the pressing member, and the mold sleeve The part mold holder is electrically insulated, and at least the part of the work pressing member that contacts the work is made of an electrically insulating material, and the upper mold for tapping and the lower mold for tapping are arranged via the plate material. In the method of using a punch press provided with an energization detection device for detecting energization ,
After lowering the striker and pressing the pressed member from above, the entire upper mold for tapping is lowered and the work pressing member presses the peripheral edge of the processing hole in the plate material from above. ,
By further lowering the striker and lowering the pressed member relative to the mold sleeve, when lowering the tap while rotating,
When it is detected that the upper mold for tapping and the lower mold for tapping are energized through the plate material by the energization detection device, it is determined that there is no tap breakage, while the upper mold for tapping by the energization detection device. And a method of using a punch press, wherein it is determined that there is a tap fold if it is not detected that the lower mold for tapping is energized through the plate material .

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