JP4766737B2 - Punch press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to Panchipure scan using the measurement result of the punch height and die height.
[0002]
[Prior art]
A punch press performs punching and forming by cooperation while sandwiching a material between a punch and a die. In the case of punching, the punch edge is inserted beyond the edge of the die, so that the material breaks after shearing and is processed.
[0003]
In such a punch press, when the punch is at the top and there is a punch, material, and die in the vertical direction, the bottom surface of the material and the top surface of the die are in the processing pass line, and the bottom surface of the punch is positioned further above the top surface of the material. Start processing from the state of being. And immediately after processing, the lower surface of the punch is positioned below the upper surface of the die.
[0004]
For the die, shim adjustment is performed mechanically when the machine is mounted, and there are three methods for punching as shown below. First, mechanical shim adjustment is performed in the same manner as the die. Second, the ram axis control parameter for operating the punch has a punch height, and an actual measurement value is input to the punch height to control the ram axis operating distance. Third, the mold itself is adjusted by providing a length adjusting mechanism.
[0005]
[Problems to be solved by the invention]
However, in the above-described technique, some dies have a height as a parameter, but the height is not controlled, and the die height is generally adjusted substantially by shim adjustment. There is a problem that the setup is complicated.
[0006]
In addition, physical height adjustment is generally used for punches, and it is common to measure the height with a caliper, etc., as in the case of a die, and input parameters based on that value, or perform shim adjustment, etc. Therefore, there is a problem that the setup is complicated.
[0007]
An object of the present invention is made by paying attention to the problems of the prior art as described above, and is to provide a punch press for avoiding complicated height adjustment and a processing method in the punch press. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a punch (P) and a die (D) for punching a workpiece (W) positioned at a machining position (K) by a workpiece movement positioning device (9). A punch press provided at a machining position (K) so as to be movable up and down, wherein the piston rod (39) of the ram cylinder (39) provided at the machining position (K) so as to be movable up and down at the upper frame (5). 41) is provided with a press ram part (47) for gripping the punch (P) in an exchangeable manner at the lower end part, and a support provided to be movable up and down on the lower frame (7) in the punch press at the processing position (K). The die (D) is replaceably provided on the upper surface of the table (95), and is taken out from the mold storage device (21) storing a plurality of punches (P) and dies (D) for next use. Punch (P) and / or die (D) at the mold setup position (23) in the middle of transferring and replacing the punch (P) and die (D) to the press ram part (47) and the support base (95). ) For measuring the height of the punch rod (P), the piston rod (41) for moving the punch (P) up and down, and the support table (95) for moving the die (D) up and down. ) In the vertical direction of the punch (P) and / or die (D) during punching processing based on the measurement data of the mold height measuring device (27). A movement control that includes a calculation unit (151) for calculating the axial movement, and controls the vertical movement of the piston rod (41) and / or the support base (95) based on the calculation result of the calculation unit (151). Part (153) Those, wherein it is.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
1 and 2 show a punch press 1 according to the present invention. In this punch press 1, a gap G is provided between the upper frame 5 and the lower frame 7 in the center of the gate-shaped frame 3. At the machining position K in the gap G, the punch P is supported on the upper frame 5 so as to be movable up and down, and the die D is supported on the lower frame 7 so as to be movable up and down.
[0022]
On the other hand, the gap G is provided with a workpiece movement positioning device 9 that supports and positions the workpiece W to be processed. In the workpiece movement positioning device 9, the machining table 11 is moved along a pair of guide rails 13 provided in the Y-axis direction (left-right direction in FIG. 1), and the right end portion of the machining table 11 in FIG. Is provided with a carriage base 15, which can be moved and positioned in the Y-axis direction. The carriage base 15 includes a plurality of workpiece clampers 17 for gripping the workpiece W, and has an X-axis carriage 19 that can be moved and positioned in the X-axis direction (vertical direction in FIG. 2).
[0023]
With the above configuration, the workpiece W is gripped by the workpiece clamper 17, the X-axis carriage 19 is moved in the X-axis direction, and the carriage base 15 is moved in the Y-axis direction, so that the workpiece W is positioned at the machining position K. Then, the punch P is pressed by the driving device, and the workpiece W is punched by the cooperation of the punch P and the die D.
[0024]
On the other hand, on the left side of the punch press 1 in FIG. 1, a mold storage device 21 for storing a large number of punches P and dies D is provided. In the vicinity of the mold storage device 21, a mold setup station 23 is provided as a mold setup position for performing mold setup, and moves between the mold storage device 21 and the mold setup station 23. A free automatic mold setup device 25 is provided. The mold setup station 25 is provided with a mold height measuring device 27 for measuring the height of the punch P and the die D.
[0025]
Between the mold storage device 21 and the mold replacement preparation position A provided in the vicinity of the processing position K in the punch press 1, the used mold is unloaded from the punch press 1 and the mold storage device 21 is used. A mold exchanging device 29 is provided for loading a new mold to be stored or used next into the punch press 1. A control device 31 for controlling the punch press 1 is provided on the right side of the punch press 1.
[0026]
3 and 4 show a punch support portion 33 that supports the punch P and a die support portion 35 that supports the die D. FIG.
[0027]
Referring to FIG. 3, a cylindrical support body 37 having a stepped portion of the punch support portion 33 is fixed to the upper frame 5, and a ram cylinder 39 is provided in the central space of the support body 37. An index gear 43 is mounted and provided at the upper end of the upper piston rod 41U extending to the front.
[0028]
The index gear 43 is connected to the upper piston rod 41U so as to rotate integrally with the upper piston rod 41U by a spline portion 45, and is relatively movable up and down, and is connected to the index motor (not shown) via a gear (not shown). To rotate the punch P.
[0029]
Referring also to FIG. 4, a press ram portion 47 is provided at the lower end portion of the lower piston rod 41 </ b> L, which is the lower portion of the piston rod 41 of the ram cylinder 39, and the working height position and the gold It can be positioned at the mold replacement height position. A lock mechanism 49 that holds and locks the punch P is provided inside the press ram portion 47.
[0030]
The lock mechanism 49 has a lock outer cylinder 51. The lock outer cylinder 51 is provided inside the press ram portion 47, and a space inside the lock outer cylinder 51 is provided with a partition 55 provided with a seal 53. It is divided into a space 57 and a lower space 59. The upper space 57 is provided with a locking cylinder 61, and the piston rod 63 of the locking cylinder 61 extends through the partition 55 to the lower space 59, and is formed at the lower end of the piston rod 63 in the lower space 59. The plate 65 and a plurality of lock claws 67 (collet chuck) are provided to be freely opened and closed.
[0031]
A spherical portion 69 is provided at the tip of the lock claw 67, and a step 71 is provided on the lower inner side of the lock outer cylinder 51 so that the lower space 59 in which the lock claw 67 moves up and down is widened. ing.
[0032]
Accordingly, when pressure oil is supplied to the upper chamber 61U of the lock cylinder 61 and lowered, the spherical portion 69 of the lock claw 67 moves to the lower side of the step 71, so that it opens and becomes unlocked. On the other hand, when pressure oil is supplied to the lower chamber 61L of the lock cylinder 61 and raised, the spherical portion 69 of the lock claw 67 rises and is moved inward by the step 71, so that the lock claw 67 is closed and locked. (State shown in FIG. 4).
[0033]
A work presser support block 73 that presses the work W during processing is provided below the support body 37 so as to be movable up and down by an air cylinder (not shown). A pair of punch holding claws 75 for holding the punch P are provided at the lower end of the work presser support block 73, and the punch P is held by engaging with the mounting groove 77 of the work presser 76. It has become.
[0034]
Note that a notch C that avoids interference with the pull stud 78 of the punch P clamped by the lock mechanism 49 when the punch P is replaced is indicated by a two-dot chain line before and after FIG. It is provided as follows.
[0035]
On the other hand, referring to FIG. 3, in the die support portion 35, cylindrical upper and lower support bodies 79 </ b> U and 79 </ b> L are integrally coupled by a bolt 81 and fixed to the lower frame 7.
[0036]
A screw portion 83 is formed on the inner peripheral surface of the lower support body 79L, and an elevating member 85 that can be moved up and down relatively with respect to the lower support body 79L by being screwed into the screw portion 83 is provided. . An elevating gear 89 is provided at the lower end portion of the elevating member 85 via a spline portion 87 so as to be movable up and down relative to the elevating member 85 and rotate integrally therewith. Rotates in place. The lifting gear 89 is rotated by a lifting motor 93 via a gear 91 and the like.
[0037]
Accordingly, when the elevating motor 93 rotates the elevating gear 89 via the gear 91 or the like, the elevating member 85 moves up and down along the lower support body 79L by the action of the screw portion 83, and the die D at the time of processing is moved. The upper surface is positioned at the machining height position (the state shown in FIG. 4) located on the pass line, or the exchange height position for exchanging the die D.
[0038]
Referring also to FIG. 4, on the upper side of the elevating member 85, a support base 95 is provided as a lower main shaft that is movable up and down along the inner peripheral surface of the upper support body 79U. The mold replacement height position can be selectively positioned. A molding cylinder 97 as a fluid pressure cylinder is provided at the upper end portion of the support table 95. A hollow space 101 is provided above and below the central portion of the piston rod member 99 of the forming cylinder 97 so that a punched residue generated during punching can be dropped and discharged.
[0039]
An index gear 105 is provided on the upper outer peripheral surface of the piston rod member 99 via the spline portion 103 so as to be movable up and down relative to the piston rod member 99 and rotate integrally therewith. The motor 107 is rotated at a fixed position.
[0040]
A die support block 109 as a die mounting portion is provided on the upper side of the index gear 105. The die support block 109 penetrates the index gear 105 and the pin 113 is always attached downward by a spring 111. However, the screw portion 113U at the upper end of the pin 113 is screwed to rotate integrally with the index gear 105 (see FIG. 4).
[0041]
Accordingly, when the support base 95 is lowered, the index gear 105 is also lowered integrally, so that the pin 113 is also lowered. However, the lower end portion of the pin 113 is in contact with the upper end surface of the upper support body 79U and cannot be lowered any further. , Relatively pushed up. Since the die support block 109 is relatively pushed up by the pin 113, the lower surface of the die holder 117 (see FIG. 4) is separated from the upper end surface of the piston rod member 99 and is unlocked.
[0042]
Referring to FIG. 4, the die support block 109 is provided with a pair of die holding claws 119 as left and right (left and right in FIG. 4) locking members for holding the die D. The die D is held by engaging with the die mounting groove 121.
[0043]
Therefore, when the index gear 105 is rotated by the index motor 107 in the unlocked state in which the support base 95 is lowered, the die holding claw 119 is also rotated integrally with the die D held by the die holding claw 119. Rotational indexing can be performed. Then, the support table 95 is raised and the upper end surface of the support table 95 is pressed against the lower surface of the die holder 117 to bring it into a locked state (see FIG. 4).
[0044]
5A and 5B show an example of the mold height measuring device 27. FIG. The mold height measuring device 27 is provided in the mold setup station 23 (see FIG. 2).
[0045]
The mold height measuring device 27 includes a mold support arm 123 that has a bifurcated tip and supports the punch P or die D, a lower detector 125 that contacts the bottom surface of the punch P or die D, and the punch P. Alternatively, an upper detector 127 that is brought into contact with the upper end surface of the die D is provided.
[0046]
The lower detector 125 is attached to the upper end portion (tip portion) of the lower arm 129 that can be moved up and down with one end portion (right side in FIGS. 5A and 5B) bent upward. The upper detector 127 is attached to the lower end portion (tip portion) of the upper arm, the tip portion of which is bent downward corresponding to the bent position of the lower arm 129.
[0047]
The lower arm 129 and the upper arm 131 are supported by sliders 135 and 137 that are supported by a vertically extending guide post 133 so as to be movable up and down, and the other end (see FIG. Sensors 139 and 141 for measuring the distance between both end portions are attached to the left end portions of 5 (A) and (B). For example, one sensor 139 may include a light emitting unit that emits laser light LB and a light receiving unit that receives reflected laser light LB, and the other sensor 141 may be a reflector. One sensor 139 may include a light emitting unit, and the other sensor 141 may include a light receiving unit. The lower arm 129 and the upper arm 131 can use various known vertical mechanisms.
[0048]
Therefore, for example, when measuring the punch height PH of the punch P prepared in the mold setup station 23, the mold is supported in the punch mounting groove 77 of the punch P as shown in FIG. The arm 123 is engaged to support the punch P, the lower detector 125 is brought into contact with the lower surface of the punch P, and the upper detector 127 is brought into contact with the upper end surface of the punch P to measure the punch height PH.
[0049]
Further, when the die height DH is measured as shown in FIG. 5B, the die support arm is placed in the die mounting groove 121 of the die D in the same manner as when the punch height PH is measured. 123 is engaged to support the die D, the lower detector 125 is brought into contact with the lower surface of the die D, and the upper detector 127 is brought into contact with the upper end surface of the die D to measure the die height DH.
[0050]
In addition, although the apparatus which measures punch height PH and the apparatus which measures die height DH can use a common thing, you may make it provide each die height measuring apparatus for exclusive use. Further, if a clamper for holding the punch P or the die D is provided at the tip of the mold support arm 123, the punch P without the punch mounting groove 77 or the die without the die mounting groove 121 is provided. D height measurement can also be performed.
[0051]
FIG. 6 shows the configuration of the control device 31. In this control device 31, an input means 145 for inputting various data and an output means 147 for outputting various data are connected to the CPU 143 which is a central processing unit. A mold height memory 149 as a storage medium is connected to the CPU 143, and punch height PH and die height DH measured by the mold height measuring device 27 are input and stored in the mold height memory 149. It is like that.
[0052]
A calculation unit 151 is connected to the CPU 143, and the axial movement amount of the punch P or die D during machining is calculated based on the punch height PH or die height DH data stored in the mold height memory 149. A movement control unit 153 for controlling the ram cylinder 39 as a punch moving mechanism and the lifting motor 93 as a die moving mechanism is provided based on the amount of movement of the shaft.
[0053]
FIG. 7 shows a processing method in the punch press according to the present invention. That is, when machining is started (step S1), the punch height PH and the die height DH prepared in the mold setup station 23 are measured using the mold height measuring device 27 as described above (step S2) and measured. The punch height PH and die height DH are automatically stored in the mold height memory 149 (step S3). Thereafter, the punch P and the die D are transferred to the die changer 29 and conveyed to the punch press 1 for mounting.
[0054]
Based on the height information stored in the mold height memory 149, the calculation unit 151 calculates the axial movement amount of the punch P and die D for performing predetermined machining, and the movement control unit 153 includes the ram cylinder 39 and Processing is performed by controlling the axial movement of the lifting motor 93 to control the upper surface position of the die D and the lower surface position of the punch P (see step S4, FIG. 8), and the processing is finished (step S5).
[0055]
From the above results, it is possible to perform desired processing without performing complicated mold height adjustment by height measurement, height adjustment, parameter input, etc., and it is possible to improve work efficiency and processing The accuracy can be improved.
[0056]
In addition, it is possible to reduce troublesome operations in the measurement work of the punch height PH and the die height DH and the input work of the measurement result, and to prevent work mistakes associated with the work.
[0057]
Further, by controlling the die D to be lowered when the workpiece is moved in the X axis and Y axis, it is possible to prevent the lower surface of the workpiece from being scratched.
[0058]
In the above-described embodiment, the punch height PH and the die height DH are measured using the mold height measuring device 27 illustrated in FIGS. 5A and 5B. Height measurement can also be performed by the method.
[0059]
(1) A method of measuring by operating the ram cylinder 39 for raising / lowering the punch and the raising / lowering motor 93 for raising / lowering the die. (2) Using a dedicated measuring device when the die is mounted, the axis is moved to detect the die. Measured from changes in pressure, current, etc. by touching to the surface. (3) Measured using a three-dimensional measuring instrument, two-dimensional measuring instrument, etc. (4) Stored measurement data with a manual measuring instrument such as an electronic caliper. A method using what can be transmitted to a medium.
[0060]
The mold height measurement can be performed at the time of mold setup as described above. Alternatively, the mold height measurement can be performed at the time of mold maintenance, and measurement data can be transmitted to the control device via a network. In this case, the mold height measuring device can be provided separately from the punch press.
[0061]
When the mold is used by a plurality of machines, the mold height measurement data is provided outside the control device 31 of the punch press 1 and is connected to the control device 31 when processing is performed by the punch press 1. It is also possible to do.
[0064]
【The invention's effect】
According to the present invention, when the die to be used next in the punch press is prepared in the setup device, the punch height and the die height are measured by the die height measuring device provided at the die setup position. Can be performed in parallel with the machining by the process, and work efficiency can be increased.
[Brief description of the drawings]
FIG. 1 is a front view showing an entire punch press according to the present invention.
FIG. 2 is a plan view seen from the direction II in FIG.
FIG. 3 is a cross-sectional view showing a punch vertical mechanism and a die vertical mechanism.
FIG. 4 is a cross-sectional view showing a punch support portion and a die support portion.
5A is an explanatory view showing a mold height measuring apparatus for punch height measurement, and FIG. 5B is an explanatory view showing a mold height measuring apparatus for die height measurement.
FIG. 6 is a block diagram illustrating a configuration of a control device.
FIG. 7 is a flowchart showing a processing method in the punch press according to the present invention.
FIG. 8 is an explanatory diagram showing an example of a moving state during processing of a punch and a die.
[Explanation of symbols]
1 Punch press 23 Mold setup station (Die setup position)
27 Mold Height Measuring Device 29 Mold Changing Device 31 Control Device 149 Mold Height Memory (Storage Medium)
P Punch D Die W Workpiece

Claims (1)

Punch provided with a punch (P) and a die (D) for punching the workpiece (W) positioned at the machining position (K) by the workpiece movement positioning device (9) so as to be movable up and down at the machining position (K). The punch (P) is placed on the lower end of the piston rod (41) of the ram cylinder (39) provided on the upper frame (5) of the punch press so as to move up and down at the processing position (K). The die (D) is provided on the upper surface of a support base (95) provided with a press ram part (47) for gripping in an exchangeable manner and being movable up and down on the lower frame (7) in the punch press at the processing position (K). The punch (P) and die (D) to be used next after being taken out from the mold storage device (21) storing a plurality of punches (P) and dies (D) are prepared for the exchange. A mold height measuring device for measuring the height of the punch (P) and / or the die (D) at a mold setup position (23) in the middle of transferring and exchanging to the mold part (47) and the support base (95) (27) and a control device for controlling the vertical movement of the support (95) for moving the piston rod (41) and the die (D) up and down for moving the punch (P) up and down (31) A calculation unit (151 for calculating the vertical movement of the punch (P) and / or the die (D) during punching based on the measurement data of the mold height measuring device (27). And a movement control unit (153) for controlling the vertical movement of the piston rod (41) and / or the support base (95) based on the calculation result of the calculation unit (151). Punch press.

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