JP3614606B2 - Centering adjustment device for drilling jigs - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centering tool for a drilling tool suitable for use in aligning an opening part of a die or the like in a punching tool, for example, with a punch which is inserted into the opening part and perforates a workpiece. The present invention relates to an adjusting device.
[0002]
[Prior art]
As a device for punching a workpiece by inserting a punch into the opening, a press working device is typical. One form of this press working apparatus will be described with reference to FIGS. FIG. 5 is an enlarged view of a main part of the press working apparatus, and the press working apparatus includes an upper die 30, a lower die 32, and a power device (not shown) for moving the upper die 30 up and down. .
[0003]
A die 34 is provided on the upper surface side of the lower mold 32. The die 34 is formed with high accuracy by other machining, and an opening 34 a is formed at the center of the die 34. A discharge hole 32a communicating with the opening 34a is formed on the lower side of the die 34, and the scrap WS punched out from the workpiece W is discharged through the discharge hole 32a.
[0004]
On the other hand, the upper die 30 is attached to the upper side of the lower die 32 so as to be movable up and down, and a punch 36 that can be fitted into the opening 32 a of the die 34 is attached to the lower surface side of the upper die 30. The punch 36 is positioned by a center knock pin (not shown) provided at a predetermined position corresponding to the die 34 and is detachably attached by a punch holder 38 and a plurality of bolts 40.
[0005]
Further, a pad 42 for holding and fixing the workpiece W is provided on the lower surface side of the upper mold 30. The pad 42 is supported on the lower surface side of the upper mold 30 via an elastic member 44 such as rubber. The pad 42 is formed with a punch insertion hole 42a through which the tip end side of the punch 36 is inserted. When the upper die 30 is lowered and the lower surface side of the pad 42 comes into contact with the workpiece W, the elastic member 44 is elastically deformed, whereby the workpiece W is sandwiched between the elastic member 44 and the lower die 32. To be fixed.
[0006]
The lower die 32 is provided with a guide post 46 for guiding when the upper die is raised and lowered. On the other hand, the upper mold 30 is integrally formed with a guide bush 48 through which the guide post 46 is slidably inserted. A stopper member 50 is attached to the proximal end side of the guide post 46. When the upper mold 30 is lowered, the lower end side of the guide bush 48 abuts against the stopper member 50, whereby the maximum lowering amount of the upper mold 30 is regulated.
[0007]
In order to perform predetermined drilling on the workpiece W, first, the workpiece W is positioned on the lower die 32, the upper die 30 is lowered, and the workpiece W is sandwiched and fixed by the pad 42 and the lower die 32. To do. Further, by lowering the upper mold 30 against the elastic force of the elastic member 40, the tip of the punch 36 punches out the workpiece W and enters the opening 34a of the die 34 as shown in FIG. Thus, a hole having a predetermined shape is formed at a predetermined position of the workpiece W, and the scrap WS generated by the drilling is discharged through the discharge hole 32a.
[0008]
As described above, in the press working, since the tip of the punch 36 is fitted into the opening 34a of the die 34, the workpiece W is drilled. Therefore, the processing accuracy of the die 34 and the punch 36, the die 34 and the punch 36, The relative positioning accuracy is important. Here, the die 34 and the punch 36 are precisely formed by a high-precision machine tool. However, since the punch 36 is attached to the upper die 30 after the die 34 is attached, the punch 36 is attached with a proper clearance. It is difficult to install.
[0009]
Therefore, for example, as shown in FIG. 7, the attachment position of the punch 36 may be shifted, and the axis XP of the punch 36 may be displaced from the axis XD of the die 34 by a dimension δ. The regular clearance between the die 34 and the punch 36 is not ensured, and defects such as burrs WB occur in the processed portion WA of the workpiece W as shown in FIG. In addition, when the axial center of the punch 36 and the die 34 is greatly deviated, or when the clearance is 0, the working point of the punch 36 or the die 34 may be destroyed.
[0010]
For this reason, for example, the soil is applied to the tip side of the punch 36 or light is applied with a mirror or the like to check the clearance. If the clearance is shifted, the punch holder 38 is moved back and forth and left and right. The fine adjustment of the punch 36 with respect to 34 is performed. However, this clearance confirmation work must be done by visual inspection or by putting the operator's body between the upper mold 30 and the lower mold 32 every time. There is a risk of sacrificing safety.
[0011]
As a countermeasure, for example, there is a prior art disclosed in Japanese Utility Model Laid-Open No. 5-13616. In this prior art, a plurality of plunger pins urged by an elastic body are incorporated in a punch holder that supports the punch, and the displacement of each plunger pin is visually confirmed from the outside, thereby A technique that enables confirmation of appropriate clearance is disclosed.
[0012]
[Problems to be solved by the invention]
In the method of checking the clearance by making full use of the above-mentioned oil soil, Komyotan, light, etc., there is a risk that safety may be impaired, and work efficiency is also low. Moreover, in the prior art described in Japanese Utility Model Laid-Open No. 5-13616, since a plurality of plunger pins are slidably provided in the punch holder for holding the punch, the structure of the punch holder is greatly increased. It becomes complicated and the manufacturing cost of the press die increases.
[0013]
The present invention has been made in view of such a point, and the object thereof is to adjust the centering for a drilling tool so that it can be easily and safely confirmed whether or not the axial centers of the punch and the die opening coincide with each other. To provide an apparatus.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a centering adjustment device for a drilling jig according to the present invention has a predetermined opening and a punch that can be fitted into the opening for punching a workpiece in cooperation with the opening. In the centering adjustment device for the tooling tool that aligns the opening of the drilling tool and the punch, it is provided on the tip side of the punch so that it can advance and retract coaxially with the punch, and the tip side is formed in a shape that can be fitted into the opening. And a spring member that constantly biases the detection jig in the protruding direction, and a guide member that guides the detection jig.
[0015]
As a result, when the punch is brought close to the opening, when the axis of the detection jig, that is, the axis of the punch and the axis of the opening coincide, the tip of the detection jig is Enter the opening smoothly. If the axis of the punch does not match the axis of the opening, or if the clearance is insufficient, the detection jig abuts against the periphery of the opening and receives the reaction force. Retreats against the spring force. Accordingly, by visually observing the operation of the detection jig from the outside, it is possible to confirm the alignment of the shaft centers and the appropriateness of the clearance.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail based on the drawings with reference to the drawings, taking as an example a case where the centering adjusting device for a drilling tool is applied to a press die. In the present embodiment, the same components as those in the above-described conventional technology are denoted by the same reference numerals, and the description thereof is omitted.
[0017]
FIG. 1 is a cross-sectional view of a main part of a press die, and a centering adjustment device 10 according to the present invention is attached to the punch 36 when confirming and adjusting the attachment position of the punch 36. The centering adjustment device 10 includes a guide tube 12, a disk-shaped spring receiving plate 14, a spring 16, and a detection jig 18.
[0018]
The guide cylinder 12 as a guide member is formed in a cylindrical shape whose inner diameter dimension matches the maximum outer diameter dimension of the punch 36, and is formed so as to be able to be fitted onto the punch 36.
[0019]
The spring receiving plate 14 formed in a disc shape is provided in the guide cylinder 12 so as to be positioned on the distal end side of the punch 36 when the guide cylinder 12 is fitted and attached to the punch 36, and the coil spring 16 as a spring member. The spring force is received. In the present embodiment, the entire punch 36 is covered with the guide tube 12. However, depending on the shape of the punch, only the front end side of the punch may be covered with the guide tube.
[0020]
The detection jig 18 is slidably provided in the guide tube 12 from the front end side of the punch 36 via the spring receiver 14 and the coil spring 16. As shown in the enlarged view of FIG. 2, the detection jig 18 is formed so as to protrude integrally with a base end portion 18a slidably inserted into the guide tube 12 and the front end side of the base end portion 18a. It is comprised from the front-end | tip part 18b made.
[0021]
The base end portion 18 a has an outer diameter dimension that fits slidably on the inner peripheral surface of the guide tube 12, and the tip end portion 18 b has a normal clearance, that is, an opening with the punch 36 and the opening 34 a of the die 34. It is formed with a cross-sectional shape that is substantially the same as the cross-sectional shape of the tip of the punch 36 so that it can enter between the portion 34a and the clearance that is originally required. Further, the detection jig 18 is attached so as not to fall off from the tip of the guide tube 12 by a retaining member (not shown) such as a snap ring. Therefore, when the alignment device 10 is attached to the punch 36, the tip 18b of the detection jig 18 protrudes from the guide tube 12 due to its own weight and the spring force of the coil spring 16.
[0022]
Next, the operation of the present embodiment will be described.
[0023]
First, the bolts 40 of the punch holder 38 are loosely tightened in advance so that the attachment position of the punch 36 can be finely adjusted in checking and adjusting the alignment. A center knock provided on the basis of NC data or the like is provided at a predetermined position of the upper mold 30, and the initial position of the punch 36 is determined by this center knock. In addition, the said operation | work is performed in the state which the upper mold | type 30 moved upwards and the press mold | type opened.
[0024]
Next, the centering adjustment device 10 is attached. The centering adjustment device 10 is attached in advance by inserting the tip 18b of the detection jig 18 into the guide tube 12 so that the tip 18b can protrude from the tip of the guide tube 12, and the coil spring 16 and the spring receiving plate 14 are respectively connected to the guide tube 12. This is done by fitting the guide cylinder 12 of the centering adjustment device 10 mounted inside the punch 36 to the outer periphery of the punch 36. Here, since the detection jig 18 is urged downward by its own weight and the spring force of the coil spring 16, as shown in FIG. 2, the base end face of the detection jig 18 in the initial state before the start of inspection. And the front end surface of the punch 36 are separated by a distance L1.
[0025]
After the alignment device 18 is combined with the punch 36 in this way, the worker retreats to a safety zone away from the press die, and operates the control panel to lower the upper die 30.
[0026]
When the initial mounting position of the punch 36 determined by the center knock matches the opening 34a of the die 34 and a regular clearance is maintained between the opening 34a and the punch 36, the detection jig 18 The tip side is formed in the same shape as the tip of the punch 36, and the detection jig 18 is coaxially attached to the punch 36 by the guide cylinder 12, so that the tip of the detection jig 18 is shown in FIG. The side enters the opening 34a of the die 34 with a proper clearance. Therefore, as shown in FIG. 3, since the detection jig 18 smoothly enters the opening 34a, the distance between the detection jig 18 and the punch 36 is maintained at L1, and is visually confirmed. it can.
[0027]
On the other hand, when the initial attachment position of the punch 36 and the attachment position of the die 34 do not coincide, that is, when the axis XP of the punch 36 and the axis XD of the opening 34a are shifted by δ, FIG. As described above, the tip end portion 18b of the detection jig 18 cannot abut on the peripheral edge of the opening 34a and smoothly enter the opening 34a.
[0028]
Accordingly, an upward reaction force is applied to the detection jig 18. The detection jig 18 urged by the upward force is retracted into the guide cylinder 12 against the spring force of the coil spring 16. Therefore, the distance between the detection jig 18 and the punch 36 is reduced to L2.
[0029]
Then, the operator visually confirms that the detection jig 18 is retracted, thereby determining that the clearance is inconsistent or that the shaft is misaligned, thereby operating the control panel to stop the lowering of the upper mold 30. Then, the upper mold 30 is raised again. Then, the punch holder 38 is hit with a hammer or the like to finely adjust the attachment position of the punch 36, and the upper die 30 is lowered again. The fine adjustment operation is repeated as necessary. Finally, when the position adjustment of the punch 36 is completed, the centering adjustment device 10 is removed from the punch 36, and a normal press working process is performed.
[0030]
According to the present embodiment configured as described above, the detection jig 18 having the same shape as the front end of the punch 36 is provided on the front end side of the punch 36 so that the detection jig 18 can be moved back and forth. By visually checking the amount, it is possible to easily determine whether or not the punch 36 and the die 34 have a relationship of maintaining a normal clearance.
[0031]
As a result, it is possible to perform pass / fail determinations such as the attachment position of the punch 36 in a short time, and it is possible to perform pass / fail determination from a place away from the press die, so that the safety of work can be greatly improved. In addition, when the punch 36 and the die 34 do not maintain a proper clearance, the detection jig 18 moves back into the guide cylinder 12 against the spring force of the coil spring 16, so that the punch 36 and the die It is possible to prevent both of 34 from being damaged.
[0032]
Furthermore, unlike the prior art described in Japanese Utility Model Laid-Open No. 5-13616, etc., the centering adjustment device 10 and the punch 36 are separate members, and the centering adjustment device 10 is removed after the adjustment work is completed. Can do. The centering adjustment device 10 according to the present embodiment includes a guide cylinder 12, a spring receiving plate 14, a coil spring 16, and a detection jig 18, and has a relatively simple structure. The punch 36 and the die 34 can be aligned with high work efficiency without causing an increase.
[0033]
A person skilled in the art, for example, may form the spring receiving plate 14 integrally in the guide tube 12 or use another spring member such as urethane rubber instead of the coil spring 16. Not only the embodiment but also various additions and changes can be made within the scope of the gist of the present invention. Further, the present invention is not limited to the press die, and can be widely applied to the alignment of an opening and other drilling tools such as a punching device that punches a workpiece in cooperation with the opening.
[0034]
Further, for example, when a detection sensor such as a photoelectric switch, a proximity switch, or a limit switch is provided on the base end surface of the detection jig 18, and the backward movement of the detection jig 18 is detected by the sensor, a buzzer is sounded. Or it can also be set as the structure which alert | reports to an operator effectively by the alerting | reporting apparatus which makes the LED lamp provided in the outer surface of the guide cylinder 12 light.
[0035]
【The invention's effect】
As described above, according to the centering adjustment device for a drilling tool according to the present invention, a configuration in which a detection jig provided so as to be able to advance and retract is allowed to enter the opening instead of directly entering the opening. Therefore, it is possible to easily and safely determine whether the punch and the axial center of the opening are aligned by visually observing the amount of retraction of the detection jig from the outside.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a press die to which an embodiment of the present invention is applied.
FIG. 2 is an enlarged cross-sectional view showing a state where a centering adjusting device is attached to a punch.
FIG. 3 is an enlarged cross-sectional view showing a situation where a punch and a die maintain a regular clearance.
FIG. 4 is an enlarged cross-sectional view showing a situation where a punch and a die do not maintain a regular clearance.
FIG. 5 is a cross-sectional view of a main part in a state in which a press die according to the prior art is opened.
FIG. 6 is a cross-sectional view of the main part showing a state where the press die is closed and the workpiece is processed.
FIG. 7 is an explanatory diagram showing an enlarged axial misalignment between a punch and an opening.
FIG. 8 is an explanatory view showing, in an enlarged manner, a machining state of a workpiece when the positional relationship between the punch and the opening is not appropriate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Centering adjustment apparatus 12 Guide cylinder 14 Spring receiving plate 16 Coil spring 18 Detection jig 20 Positioning member 30 Upper mold 32 Lower mold 34 Die 34a Opening 36 Punch 38 Bolt 40 Punch holder 42 Pad

Claims (4)

Drilling jig tool center for aligning the opening and punch of a drilling tool having an opening of a predetermined shape and a punch that can be fitted into the opening for punching a workpiece in cooperation with the opening. In the adjustment device,
A detection jig provided on the front end side of the punch so as to be able to advance and retreat on the same axis as the punch, and having a front end formed into a shape that can be fitted into the opening;
A spring member that constantly biases the detection jig in the protruding direction;
A guide member for guiding the detection jig;
A centering adjustment device for a drilling jig characterized by comprising: Drilling jig tool center for aligning the opening and punch of a drilling tool having an opening of a predetermined shape and a punch that can be fitted into the opening for punching a workpiece in cooperation with the opening. In the adjustment device,
A cylindrical guide member provided coaxially so as to cover at least the tip side of the punch;
A spring receiving plate movably provided in the guide member;
A detection jig provided with a tip portion formed into a shape that can be fitted into the opening, and the tip portion slidably provided in the guide member so as to protrude from the tip of the guide member;
A spring member interposed between the spring receiving plate and the detection jig, and constantly biasing the detection jig in the protruding direction;
A centering adjustment device for a drilling jig characterized by comprising: The centering adjustment device for a drilling tool according to claim 1 or 2, further comprising a notification device for detecting and notifying the movement of the detection jig in the guide member. The centering adjustment device for a drilling jig according to any one of claims 1 to 3, wherein the cross-sectional shape of the tip of the detection jig is substantially the same as the cross-sectional shape of the tip of the punch.

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