JPH0994620A - Method and device for fitting die into die fitting hole in punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically change one die among plural kinds in use one by one and individually without using a holder etc. requiring the same precision as the die. SOLUTION: A device is provided with a guide hole 9 coaxially with the die fitting hole 3 at the lower side of the die fitting hole 3 arranged to a die holder 1 in the punch press, a lower pusher 15 to press a support shaft 11, which is fitted into the guide hole 9, upward, an upper pusher 51 to press a die 13, which supports the upper end of the support shaft, downward and a clamping means of the die 13. By pressing the die 13 with the lower part 51a of the upper pusher 51 downward, at the same time, by descending the upper part 15a of the lower pusher 15 while supporting the lower end of the support shaft 11, the die 13 is not inclined and fitted into the die fitting hole 3 while holding the horizontal position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inserting a die in a turret punch press or other punch press into a die insertion hole of a die holder provided on a base plate such as a lower turret.

[0002]

2. Description of the Related Art Conventionally, a turret punch press as a punch press, for example, uses a plurality of types of dies having different outer diameters. Installed on.

When exchanging such a die, the die holder is separated from the lower turret, the die is knocked out of the die holder, the die to be replaced is fitted into the die holder, and the die holder is attached to the lower turret. Accompanied by.

In a turret punch press equipped with an automatic tool changer, a removable die holder having the same precision as the die is used, and the method of exchanging the die together with the die holder and the shape of the die are unified. By doing so, the method of exchanging only the die is adopted.

[0005]

In the above-mentioned conventional die exchange method, in the case of manual work, for each die to be exchanged, the die holder is separated, the die is knocked out, the die to be exchanged is fitted, and the die holder is used. It requires a work such as mounting to the lower turret, and since these occupy a large weight in the working process of the turret punch press, the burden on the operator was large.

Further, in a turret punch press equipped with an automatic tool changer, in the case of a method of exchanging the die holders together, it is not possible to exchange each die or a die holder having the same accuracy as the die is newly added. I had to prepare. For the unified die shape,
The disadvantage is that conventional dies cannot be used.

On the other hand, there has been a problem that has been difficult to replace the die in the past. That is, the clearance is 2
If the die is tilted when it is inserted into the die insertion hole of about 0 micron, the die hits the inner periphery of the die insertion hole at an angle, which makes the insertion impossible. Therefore, it is necessary to eliminate the inclination of the die in order to automatically replace the die independently.

An object of the present invention is to enable a plurality of types of dies that have been conventionally used to be automatically exchanged individually for each type without using a die holder or the like which requires the same precision as the dies. The present invention is to provide a die fitting means.

[0009]

In order to solve the above-mentioned problems, the method of the present invention according to claim 1 is characterized in that the bottom of the die holder and the pedestal below the die fitting hole provided in the die holder in the punch press. A guide hole concentric with the die insertion hole is provided, and the vertical position of the upper end of the support shaft inserted into the guide hole is substantially aligned with the upper surface of the die holder, and in the state where the support shaft supports the die, The lower part of the vertically movable upper pusher pushes the die downward, and at the same time, the upper part of the vertically movable lower pusher lowers while supporting the lower end of the spindle and holding the die horizontally at the upper end of the spindle. By doing so, it is fitted into the die fitting hole while being kept horizontal.

In the method of the present invention according to claim 2, a guide hole concentric with the die fitting hole is provided in the bottom of the die holder and the base below the die fitting hole provided in the die holder in the punch press, and the guide hole is provided. The upper and lower positions of the vertically movable lower pusher inserted from below are almost aligned with the upper surface of the die holder, and the die is supported by the upper part of the lower die pusher while the die is supported by the upper part of the lower die pusher. At the same time as pressing downward, the upper part of the lower pusher supports the die and lowers while holding the die horizontally on the upper part of the lower pusher, so that it fits into the die insertion hole while keeping it horizontal. To do.

According to a third aspect of the present invention, there is provided a guide hole, which is concentric with the die fitting hole provided in the bottom of the die holder and the pedestal below the die fitting hole provided in the die holder in the punch press, and the guide hole. A lower pusher for vertically moving a support shaft fitted in a guide hole, an upper pusher for vertically moving a die supported on the upper end of the support shaft, and a die holding and positioning means for holding the die and positioning it on the support shaft. And are provided.

The device of the present invention according to claim 4 is the device according to claim 3.
In the device of the present invention according to the above, the upper end of the support shaft is provided with a flange portion, and the flange portion is inserted into the die insertion hole. With such a configuration, the fall of the support shaft is prevented. In addition, the die can be horizontally supported in a more stable state.

According to a fifth aspect of the present invention, there is provided a guide hole concentric with the die fitting hole provided on the bottom of the die holder and the pedestal below the die fitting hole provided in the die holder in the punch press. A lower die pusher for moving the upper part up and down in the guide hole, an upper pusher for vertically moving the die supported on the upper part of the lower pusher, and a die holding and positioning means for holding the die and positioning it on the upper part of the lower pusher. , Are provided.

According to a sixth aspect of the present invention, in the apparatus according to the third, fourth, and fifth aspects, the die holding / positioning means is provided on the lower surface of a pair of arms to be opened and closed by the opening and closing movements of the arms. A part of the outer circumference of which is provided with a plurality of sandwiching pins in a protruding manner.

According to a seventh aspect of the present invention, in the apparatus according to the third, fourth, and fifth aspects, as the die holding / positioning means, the facing surfaces of a pair of arms to be opened and closed are formed by opening and closing movements of the arms. It is characterized in that it has a shape that holds a part of the outer periphery of the die.

In the above method and apparatus according to the present invention,
The upper and lower pushers are, for example, air cylinders and hydraulic cylinders.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION First, an embodiment of a first device according to the present invention will be described with reference to the drawings, and subsequently a die fitting method performed using the device will be described.

FIG. 1 shows a die inserting operation in one embodiment of the first apparatus according to the present invention. The die holder bottom portion below the die inserting hole 3 provided in the die holder 1 in the turret punch press. 5 and a base 7 called a lower turret are provided with guide holes 9 concentric with the die fitting hole 3. The support shaft 11 is fitted in the guide hole 9, and the die 13 fitted in the die fitting hole 3 is horizontally supported by the upper end of the support shaft 11. The support shaft 11 may be, for example, an annular support shaft (color). Further, a flange portion 11 a is provided on the upper end of the support shaft 11, and the flange portion 11 a is fitted into the die fitting hole 3.

The support shaft 11 can be raised by a lower pusher 15 such as an air cylinder or a hydraulic cylinder that moves the support shaft 11 up and down.

The clamping and positioning means 17 of the die 13 shown in FIGS. 2 to 5 which can clamp one die 13 of a plurality of types having different outer diameters and position it on the support shaft 11 has an upper portion 15a of the lower pusher 15. The die 1 pulled out from the die fitting hole 3 onto the die holder 1 by being raised.
3 can also be sandwiched, and as shown in FIGS. 2, 3, 4, and 5, by a feed screw shaft 25 linked to a motor 23 mounted on a base body 21 via a mounting plate 19. A plurality of holding pins 29 for holding a part of the outer periphery of the die 13 are symmetrically projected on the lower surfaces of the pair of left and right arms 27 that open and close in the left and right direction by the opening and closing movement of the arms 27 in the left and right direction. It will be. Here, the feed screw shaft 25 is supported by the left and right bearings 33 attached to the base body 21 by the bracket 31, and the left screw portion 25a is also supported.
And the right side screw portion 25b are mutually opposite screws, and these are screwed into the nut portions 35 provided on the upper surfaces of the left and right arms 27, respectively, and the feeding portion 37 having a U-shaped cross section is provided at the root portions of the left and right arms 27. The rotation force of the motor 23, which is fitted to the guide 39 fixed to the base 21, is driven by the drive timing pulley 43 and the timing belt 4 provided on the output shaft 41 of the motor 23.
5, transmitted to the nut portion 35 provided on the left and right arms 27 via the driven timing pulley 47 provided at the end portion of the feed screw shaft 25 and the feed screw shaft 25, whereby the left and right arms 2
7 performs opening and closing movements to the left and right along the guide 39.

FIG. 6 shows an example of the arrangement of a plurality of holding pins 29 with respect to the left arm 27.
Four pinching pins 2 tangentially around the outer periphery of the
9 is arranged and the right arm 27 not shown in the drawing
Is symmetrical to this. It is shown that a pair of left and right arms 27 can be opened and closed in the left-right direction to sandwich the large, medium and small dies 13 having outer diameters. The plurality of holding pins 29 hold the die 13 by the thrust of the feed screw shaft 25, provide a gap with the outer periphery of the die 13 to guide the vertical movement of the die 13, and hold the die 13 from the left and right sides. It has a function of centering 13.

As another example of the sandwiching and positioning means 17 for the die 13, as shown in FIG. 7, the opposing surfaces of a pair of left and right arms 27 which are opened and closed in the left and right direction by a feed screw shaft linked to a motor are used as the arms 27. In some cases, the opening and closing movement of the die in the left-right direction may be such that a part of the outer periphery of the die 13 is clamped. As an example of a specific shape of the facing surfaces of the pair of left and right arms 27, notches 49 that contact diagonally front, rear, left and right of the outer periphery of the sandwiched die 13 are provided symmetrically on the facing surfaces. There is a shape.

Another example of the driving means for the opening / closing mechanism of the pair of left and right arms 27 is hydraulic / pneumatic driving.

An upper pusher 51 such as an air cylinder or hydraulic cylinder for vertically moving the die 13 supported on the upper end of the support shaft 11 is provided between the left and right arms 27 as shown in FIGS. Set the position and mount plate 53
It is fixed to the base body 21 via. An ascending end auto switch 55 and a descending end auto switch 57 of the upper part 51a are attached to the outer surface of the upper pusher 51, respectively. A tubular portion 51b is provided on the front end portion of the upper portion 51a of the upper pusher 51 so as to project upward, and the tubular portion 51b is fitted to a guide rod 59 fixed to the lower surface of the mounting plate 53.

When the die 13 is fitted into the die fitting hole 3 provided in the die holder 1 using the apparatus having the above-mentioned structure, the upper part 15a of the lower pusher 15 is raised so that the die 13 is fitted into the guide hole 9. The supporting shaft 11 is pushed up, and the vertical position of the upper end of the supporting shaft 11 is made to substantially coincide with the upper surface of the die holder 1. Then, as shown in FIGS. 2 and 3, for example, the nut member 6 guided by the guide rail 61.
3 is provided on the lower surface of the base of the base 21, and the feed screw shaft 65 screwed to the nut member 63 is rotated by the servomotor 67 to move the base 21 forward or backward, and to move the base 21 by other arbitrary means. Thus, with the position of the die 13 held by the plurality of holding pins 29 set right above the die fitting hole 3 provided in the die holder 1, the motor 23 is operated to slightly open the left and right arms 27. For example, the die 13 is guided by the plurality of holding pins 29 and is dropped and supported on the support shaft 11. Note that FIG.
As shown in, for example, by making a part of the upper turret 69 smaller than the base (lower turret) 7, it becomes possible to provide a space for die exchange including fitting of the die 13.

Next, as shown in FIG. 1A, by lowering the lower portion 51a of the upper pusher 51, the die 13 is pressed downward by the lower portion 51a, and at the same time, the upper portion 15a of the lower pusher 15 is supported by the spindle 11. If the die 13 is lowered while supporting the lower end of the die and holding the die 13 horizontally at the upper end of the support shaft 11, the die 13 does not tilt and the die 13 keeps the horizontal state as shown in FIG. 1B. It is fitted into the fitting hole 3.

In the state where the die 13 is fitted in the die fitting hole 3, the lower portion 51a of the upper pusher 51 is
Is lifted, and the lower pusher 15 supports the support shaft 11
By pushing up, the die 13 can be pulled out from the die insertion hole 3 while maintaining the horizontal state.

An embodiment of the second device according to the present invention will be described with reference to FIG.

FIG. 8 shows a die inserting operation in an embodiment of the second device according to the present invention, and the die holder bottom portion below the die inserting hole 3 provided in the die holder 1 in the turret punch press. 5 and a base 7 called a lower turret are provided with guide holes 9 concentric with the die fitting hole 3. For example, the lower pusher 15 such as an air cylinder or a hydraulic cylinder can be inserted into the guide hole 9 from below by raising the upper portion 15a.

The sandwiching and positioning means for the die not shown in FIG. 8 is the same as the sandwiching and positioning means 17 for the die described in the above-mentioned embodiment, whereby one of a plurality of types having different outer diameters is provided. The die 13 can be clamped and positioned on the upper portion 15a of the lower pusher 15.

The upper pusher 51 such as an air cylinder or a hydraulic cylinder is also similar to the upper pusher 51 described in the above embodiment, whereby the die 13 supported on the upper end of the upper portion 15a of the lower pusher 15 is lowered. Can be pressed to.

When the die 13 is fitted into the die fitting hole 3 provided in the die holder 1 by using the apparatus having the above-described structure, the upper portion 15a of the lower pusher 15 is moved upward so that the guide hole 9 is inserted from below. Lower pusher 1 inserted
5 the upper and lower positions of the upper part 15a of the die 5 in the vertical direction
Match the top surface of the. Next, by using the nipping and positioning means 17 of the die 13 as in the above embodiment,
The die 13 is supported on the upper portion 15a of the lower pusher 15.

Next, as shown in FIG. 8A, by lowering the upper portion 51a of the upper pusher 51, the upper portion 51a pushes the die 13 downward, and at the same time, the upper portion 15a of the lower pusher 15 supports the die 13. If the die 13 is lowered while being held horizontally by the upper portion 15a of the lower pusher 15, the die 13 does not tilt and is kept horizontal as shown in FIG. Be inserted into.

In the state where the die 13 is fitted in the die fitting hole 3, the upper portion 51a of the upper pusher 51 is
Is raised and the lower pusher 15 causes the die 13
By pushing up, the die 13 can be pulled out from the die insertion hole 3 while maintaining the horizontal state.

As shown in FIG. 9, when the die 13 is fitted into the die fitting hole 3, the position of the die 13 is slightly displaced from the die fitting hole 3 in the horizontal direction due to an error in a mechanical device. There is. The upper pusher 51 is the die 1 in that state.
Push 3 from above with force P. At this time, the frictional force generated on the bottom surface of the die 13 is μP (μ is a friction coefficient). The inlet of the die insertion hole 3 of the die holder 1 is chamfered at, for example, 30 degrees, and the horizontal component force when the die 13 contacts the chamfered portion 71 is Px. Here, if Px> μP, the die 13 moves horizontally without tilting and is fitted into the die fitting hole 3. In addition, die 13 and die 1
The friction coefficient with the surface with which 3 contacts is the same.

As shown in FIG. 10, P × {(1 / tan θ) −μ} obtained by subtracting the loss μP due to friction generated in the chamfer 71 from the horizontal component force P by P (1 / tan θ). Is the force Px for moving the die 13 in the horizontal direction.
When Px> μP as described above, the die 13 is fitted into the die fitting hole 3 without tilting, so Px = P × {(1 /
tan θ) −μ}> μP, and therefore (1 / tan
θ)> 2μ. Therefore, if μ = 0.2, then θ <68,2 degrees. The chamfering angle of 30 degrees has cleared this limit angle of 68.2 degrees, and the die 1
If the corner portion of 3 is located inside the chamfered portion 71, the die 13 can be sufficiently slid into the die fitting hole 3 by being laterally displaced by the pressing force of the upper pusher 51.

The present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes.

[0038]

According to the method of the present invention according to claims 1 and 2, the die can be securely fitted into the die fitting hole while keeping it horizontal without tilting. Therefore, conventionally, it was difficult to replace the die, that is, when the die is inserted into the die insertion hole, the die is inclined,
It is possible to solve the problem that the die comes into contact with the inner periphery of the die insertion hole at an angle, making it impossible to insert the die.

The device according to the present invention according to claims 3, 4 and 5 is used for carrying out the invention of the method of the present invention.
In the same manner as described above, it is possible to securely insert the die into the die insertion hole while keeping it horizontal without tilting.

In particular, the device according to the present invention according to claims 6 and 7 is capable of holding one die of a plurality of types having different outer diameters and positioning it on the spindle or on the upper part of the lower pusher. Since it has a function and can keep the die horizontal when the die moves up and down,
Since one die of a plurality of types having different outer diameters can be fitted into the respective die fitting holes, it is possible to easily manufacture an automatic die exchanging device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a die inserting operation in an embodiment of a first device according to the present invention.

FIG. 2 is a plan view showing an example of a die holding and positioning unit and an upper pusher.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV in FIG.

FIG. 6 is an explanatory diagram showing an example of the arrangement of the holding pin with respect to the arm.

FIG. 7 is a plan view showing another example of the sandwiching and positioning means of the die.

FIG. 8 is a sectional view showing a die inserting operation in the embodiment of the second device according to the present invention.

FIG. 9 is a cross-sectional view showing a state in which the die is fitted into the chamfered portion at the entrance of the die fitting hole while being in contact with the chamfered portion.

FIG. 10 is an explanatory diagram showing a relationship between a horizontal component force, a frictional force, and the like that act on the die when the die is inserted while being in contact with the chamfered portion at the entrance of the die insertion hole.

[Explanation of symbols]

 1 Die Holder 3 Die Fitting Hole 5 Die Holder Bottom 7 Platform 9 Guide Hole 11 Spindle 11a Collar 13 Die 15 Lower Pusher 15a Upper 17 Die Clamp Positioning Means 23 Motor 25 Feed Screw Axis 27 Arm 29 Clamping Pin 51 Upper Pusher 51a lower part

Claims (7)

[Claims] 1. A guide hole concentric with the die fitting hole is provided in the bottom of the die holder and the base plate under the die fitting hole provided in the die holder in the punch press, and the upper end of the spindle inserted into the guide hole. When the die is gripped by the lower part of the upper die pusher that can move up and down while the vertical position of the die is almost aligned with the upper surface of the die holder and the support shaft supports the die, it can move up and down at the same time. The upper part of the lower die pusher supports the lower end of the support shaft, and lowers the die while holding the die horizontally at the upper end of the support shaft, so that the die is inserted into the die insertion hole while keeping it horizontal. A method of inserting a die in a punch press into a die insertion hole. 2. A guide hole concentric with the die fitting hole is provided in the bottom of the die holder and the base below the die fitting hole provided in the die holder in the punch press, and the guide hole can be vertically moved by being inserted from below. The upper and lower positions of the lower die pusher are almost aligned with the upper surface of the die holder, and the die is supported by the upper part of the lower die pusher. At the same time as pressing, the upper part of the lower die pusher lowers while supporting the die and holding the die horizontally on the upper part of the lower die pusher, so that the die is inserted into the die fitting hole while keeping it horizontal. And a method for fitting a die in a punch press into a die fitting hole. 3. A guide hole concentric with the die fitting hole provided on the bottom of the die holder and the base below the die fitting hole provided in the die holder in the punch press, and a spindle inserted into the guide hole. A lower die pusher that moves the
A punch press, comprising: an upper die pusher for vertically moving a die supported on the upper end of the support shaft; and a die holding and positioning means for holding the die and positioning the die on the support shaft. Device that inserts the die into the die insertion hole. 4. A flange is provided on the upper end of the support shaft, and
4. An apparatus for inserting a die into a die insertion hole in a punch press according to claim 3, wherein the collar portion is inserted into the die insertion hole. 5. A guide hole concentric with the bottom of the die holder provided on the bottom of the die holder provided in the die holder in the punch press and the die fitting hole provided in the pedestal, and an upper part for vertically moving the guide hole. A lower die pusher, an upper pusher for vertically moving a die supported on the upper portion of the lower pusher, and a die holding and positioning means capable of holding the die and positioning it on the upper portion of the lower pusher,
An apparatus for inserting a die in a punch press into a die insertion hole, characterized by comprising: 6. The sandwiching and positioning means of the die is provided on the lower surface of a pair of arms which can be opened and closed, by the opening and closing movement of the arms,
A device for inserting a die into a die insertion hole in a punch press according to claim 3, 4 or 5, wherein a plurality of holding pins for holding a part of the outer periphery of the die are provided in a protruding manner. . 7. The sandwiching and positioning means for the die has a shape in which the opposing surfaces of a pair of openable and closable arms sandwich a part of the outer periphery of the die by the opening and closing movement of the arms in the left-right direction. An apparatus for inserting a die into a die insertion hole in the punch press according to claim 3, 4 or 5.