JPH0957367A - Punch fitting method in punch press and punch press using the fitting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch fitting method capable of easily and surely fitting a punch to an upper supporting member and a punch press using the fitting method. SOLUTION: A guide part 13 which is slightly larger than a punch P provided on the periphery of an upper turret hole 9 on the upper surface of an upper turret 107 decides the position of the punch P, and a punch gripper 19 moves the punch P to the position of the guide part 13. The punch P is released at this position and dropped, and the guide part 13 guides the punch P to the upper turret hole 9. Because inclined parts 5, 11 or a partially arc part of a lower shoulder part of a punch guide 3 slide on the inclined parts or the like of an upper shoulder part of the upper turret hole 9, the punch P is fitted to the upper turret hole 9. Because inclined parts 33, 35, etc., are also provided on an upper shoulder part of a guide key 33 of the upper turret hole 9, engagement is made with a guide groove 31 provided in the punch guide 3 to decide the directivity of the punch P. The inclined parts are <=45 deg. which is sharp in gradient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch mounting method in a punch press, and more particularly to a punch mounting method in a punch press which can easily mount a punch in an upper turret.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show an entire turret punch press as a general punch press. A frame 103 is erected on the turret punch press 101, and a gap portion 105 is provided at the center of the frame 103. This gap part 1
Reference numeral 05 denotes an upper turret 107 serving as an upper support member having a plurality of punches P mounted on the upper side, and lower turret 1 serving as a lower support member having a plurality of dies D mounted on the lower side.
09 are provided so as to be freely rotatable and indexable. A ram 111 is provided on the upper side of the upper turret 107 so as to be vertically movable, and the punch P is provided on the lower end of the ram 111.
A hitting element 113 for hitting is provided.

Therefore, the desired punch P and die D are selected, and the ram 111 descends with respect to the work W positioned between the punch P and the die D, and the punch P is struck by the striker 113 to die. The punching process is performed in cooperation with D.

A fixed table 115 is provided in the gap portion 105, and movable tables 117 are provided on both left and right sides (upper and lower sides in FIG. 7) of the fixed table 115. A large number of free bearings 119 for movably supporting the work W are provided on the upper surface of the fixed table 115.

At the right end in FIG. 7 on the upper surface of the movable table 117, a carriage base 121 connecting the left and right movable tables 117 is provided across the fixed table 115. In addition, Y on the right end of the frame 103
A shaft drive motor MY is provided. Therefore, the carriage base 121 moves in the Y-axis direction integrally with the left and right movable tables 117 by the drive of the Y-axis drive motor MY.

A carriage 125 having left and right work clampers 123 for gripping a work W is provided on the carriage base 121 so as to be movable in the X-axis direction (vertical direction in FIG. 7), and an X-axis drive motor MX is provided. Is used to move in the X-axis direction.

With the above construction, the carriage base 121 is moved and positioned in the Y-axis direction by the Y-axis drive motor MY, and the carriage 125 holding the work clamper 123 is moved in the X-axis direction by the X-axis drive motor MX. The workpiece W is moved and positioned to the punch P of the upper turret 107 and the work W positioned at the position of the die D of the lower turret 109, and the hammer 113 strikes the punch P to perform processing.

FIG. 8 shows a punch P mounted on the upper turret 107 and a die D mounted on the lower turret 109.
It is shown.

The punch P has a punch tip 127 at the bottom.
A punch guide 129 is slidably provided outside the punch tip 127. The punch guide 129 is supported by the upper turret 107 so as to be movable downward by a lift ring 133 which is constantly urged upward by a lift spring 131. On the outer peripheral surface of the punch guide 129, the guide groove 13 is vertically provided.
5 is provided, and a punch key 137 is attached inside.

A punch driver 139 is attached to the upper portion of the punch tip 127 by a punch tip fixing bolt 141. A punch head 143 is attached to the upper portion of the punch driver 139. Also,
A punch groove 145 is provided in the up-down direction on the outer peripheral surface of the punch tip 127, and the punch key 137 is slidably engaged with the punch groove 145.

Therefore, when the punch head 143 is hit by the hitting element 113, the punch chip 127 is hit by the punch driver 139 to perform punching. At this time, the punch chip 127 moves up and down by the action of the punch key 137 and the punch groove 145 while maintaining a certain directionality.

A stripping spring 147 is provided above the punch guide 129 to urge the punch head 143 upward. Therefore, after the punching process, the stripping spring 147 causes the punch chip 127 to be pulled out from the work through the punch head 143 and the punch driver 139 and moved upward.

Further, the turret hole 1 of the upper turret 107
A guide key 151 is provided at 49 and is slidably engaged with the guide groove 135. Therefore, the punch guide 129 is set in the turret hole 149 with a certain directionality.

On the other hand, the lower turret 109 is provided with a die holder 153, and the die holder 153 is provided with a die key 155. A die groove 157 is provided in the die D in the vertical direction, and the die key 1
55 is engaged. This determines the directionality of the die D.

In mounting the punch P as described above, the punch guide 129 is fitted into the turret hole 149 with a clearance of several μm to several tens of μm. Therefore, the punch guide 129 and the turret hole 149
It is necessary to prevent so-called twisting due to the wedge effect that accompanies the inclination of the punch guide 129 that occurs at the contact portion between the and.

Therefore, the punch P for the turret hole 149 is formed.
Is manually inserted by the operator while maintaining the parallel to the turret hole 149. Alternatively, the punch P is provided with a joint, a clamp mechanism, or the like having flexibility in all directions, and a vertical load is applied to the turret hole 149 or vibration is applied.

[0017]

However, in the case where the punch P is manually inserted by the operator as described above, the weight of the punch P is reduced in order to insert the punch P into the turret hole 149 having a small clearance. There is a problem that alignment work using a hanging device such as an air cylinder for balancing is required, which is complicated and poor in workability.

Further, there is a problem that a complicated aligning device is required for automatic replacement by a robot or an automatic transfer device using the joint or clamp mechanism.

The object of the present invention has been made by paying attention to the above-mentioned conventional techniques, and a punch mounting method and a punch mounting method in a punch press capable of easily and reliably mounting the punch on the upper supporting member. It is to provide a punch press using a mounting method.

[0020]

In order to achieve the above object, a method of mounting a punch in a punch press according to a first aspect of the present invention comprises a punch mounted on an upper supporting member,
A method of mounting a punch in an upper support member hole of a punch press which performs punching processing in cooperation with a die which is opposed to the punch and is mounted on a lower support member, wherein the punch gripper holding the punch is attached to the upper grip member. The upper gripping member is moved and positioned above the hole of the upper support member at a position determined by the guide section provided on the upper surface of the supporting member, the punch gripper is used to release the punch, and the punch is guided by its own weight drop. It is characterized in that a punch is attached to the hole of the upper support member.

Therefore, the punch gripper holding the punch is moved above the predetermined upper support member hole of the upper support member. At this time, since the guide portion is provided around the hole of the upper support member at a position where a space for allowing the punch to enter with a certain margin is provided, the punch can be positioned by the guide portion. In this state, when the punch gripper releases the punch and drops it by its own weight, it is guided to the guide portion and the punch is mounted in the upper support member hole.

According to a second aspect of the present invention, there is provided a method for mounting a punch in a punch press, wherein an inclined portion or a partial arc portion provided on a lower shoulder portion of the punch guide of the first punch is an upper shoulder portion of the upper support member hole. It is characterized in that the punch is guided to the center of the upper support member hole by sliding with respect to the inclined portion or the partial arc portion provided on the.

Therefore, when the punch is dropped, the inclined portion or the partial arc portion provided on the lower shoulder portion of the punch guide is different from the inclined portion or the partial arc portion provided on the upper shoulder portion of the upper support member hole. Slide, so that the punch is guided to the center of the upper support member hole.

In the punch press of the invention according to claim 3, the punching work is performed by the cooperation of the punch mounted in the upper support member hole of the upper support member and the die facing the punch and mounted in the lower support member. A punch press for performing, wherein a guide portion that forms an inscribed circle slightly larger than the punch around the upper support member hole on the upper surface of the upper support member is provided, and the upper shoulder of the upper support member hole is inclined. It is characterized in that a part or a partial arc part is provided.

Therefore, the guide portion, which is provided around the hole of the upper supporting member on the upper surface of the upper supporting member and secures a space slightly larger than that of the punch, determines the position of the punch. Therefore, the punch gripper moves the punch to the position of the guiding portion. To move. At this position, the punch gripper releases the punch and drops it, but the guide portion guides the punch to the hole of the upper support member and is attached.

A punch press according to a fourth aspect of the present invention is characterized in that the lower shoulder portion of the punch guide of the third aspect is provided with an inclined portion or a partial arc portion.

Therefore, since the inclined portion or the partial arc portion provided on the lower shoulder portion of the punch guide slides down on the inclined portion or the partial arc portion provided on the upper shoulder portion of the upper support member hole, the punch is formed. The upper support member is guided and attached to the central portion of the hole.

The punch press of the invention according to claim 5 is characterized in that the upper shoulder portion of the guide key provided in the upper support member hole according to claims 3 and 4 is provided with an inclined portion or a partial arc portion. To do.

Therefore, the guide key engages with the guide groove provided in the punch guide to determine the directionality of the punch.

A punch press according to a sixth aspect of the present invention is characterized in that the inclined portion according to the third, fourth and fifth aspects is chamfered at 45 ° or less.

Therefore, the lower shoulder portion of the punch guide, the upper shoulder portion of the upper support member hole, and the inclined portion provided at the upper end shoulder portion of the punch guide are steep at 45 ° or less.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. Since the structures of the turret punch press 101 and the punch P, which are general punch presses, have already been described in detail in the section of the related art, common portions will be denoted by the same reference numerals and redundant description will be given here. Will be omitted.

As shown in FIGS. 1 and 2, in the punch P of the turret punch press 1 according to the present invention, the lower shoulder portion of the punch guide 3 is chamfered so that the inclined portion 5 or the partial arc R is provided. (FIGS. 2A and 2B). Further, the upper shoulder portion of the upper turret hole 9 of the upper turret 7 serving as the upper support member is also chamfered, and the inclined portion 11 or the partial arc R is provided. The inclination angle θ of the inclined portion 11 is set to 30 ° or less so that the punch P can easily enter (FIG. 2 (C)).

Further, on the upper surface of the upper turret 7, at least three guide posts 13 as guides are provided vertically in a circle concentric with the upper turret hole 9. The radius of the circle inscribed in the guide post 13 is set to be slightly larger than the maximum outer diameter of the punch P. The guide post 13 limits the punch P so that it does not tilt more than a predetermined angle with respect to the upper turret hole 9 when the punch P is inserted into the upper turret hole 9.

This will be explained with reference to a simple example shown in FIG. 3. When the pencil 15 is put into the tube 17 having a diameter of about twice, when the pencil 15 is inclined as shown in FIG. Of the tilt angle causes the following three cases. That is, the pencil 15 slides into the tube 17 (θ = 1
5-20 °). The pencil 15 falls outside the cylinder 17 (θ =
40-45 °). The pencil 15 is caught on the upper end of the tube 17 and stops (θ = 20 to 40 °).

In the above three cases, the difference occurs in the frictional force between the pencil 15 and the cylinder 17, but the pencil 15 slides into the cylinder 17 if θ is less than a certain angle. Therefore, the guide post 13 plays a major role in guiding the punch P so that it is always inserted into the upper turret hole 9 at a certain angle or less.

On the other hand, as shown in FIG. 4, in the punch gripper 19 which holds the punch P and moves it to a predetermined position of the upper turret 7, a pair of grip arms 23 are rotated by pins 25 on the lower surface of the base plate 21. It is movably installed. This punch gripper 19 is used for robots, X, Y,
It is attached to a device corresponding to a robot that moves in the Z-axis direction.

A drive device 27 is provided at the base end of the grip arm 23, and a recess 29 of various sizes is provided near the tip of the grip arm 23 so as to accommodate punch heads 143 of various sizes. Is provided. Therefore, the driving device 27 opens and closes the grip arm 23 to grip the punch head 143 in the recess 29.

As described above, the punch guide 3 is provided with the guide groove 31, and the gap between the guide groove 31 and the guide key 33 is generally set to 20 μm or less. Therefore, as shown in FIG. 1, the lower shoulder portion of the guide groove 31 and the upper and left upper shoulder portions of the guide key 33 have the same inclined portions 35 and 37 as those of the punch guide 3 and the upper turret hole 9 described above. Is provided.

Next, the operation of setting the punch P on the upper turret 7 will be described with reference to FIGS.

First, the punch P gripped by the punch gripper 19 is brought close to the upper turret hole 9 of the upper turret 7 and carried to the position of the guide post 13. The height of the lower edge of the punch guide 3 is near the upper surface of the upper turret 7.
When it is determined that the punch P has come directly above the upper turret hole 9, the punch gripper 19 is opened to open the punch P and drop it. After opening, the recess 29 of the punch gripper 19 serves as a guide so that the punch P falls straight.

At this time, an error (about ± 0.1 mm) generally occurs between the center line PC of the punch P and the center line HC of the upper turret hole 9 due to a positioning error of the robot or the like, but due to the action of the guide post 13. The lower edge of the punch guide 3 is located inside L1 of the inclined portion 11 of the upper turret hole 9. That is, the width L2 of the inclined portion 11 is set to the positioning error of the robot or the like, and the punch gripper 19 punches P.
The error in gripping the punch, the gap between the punch guide 3 and the upper turret hole 9 (about 20 μm), and the deviation due to the inclination of the punch P are set to be larger than those combined.

When the punch P is placed inside the guide post 13, the punch gripper 19 opens the grip arm 23 by the driving device 27 and releases the punch head 143.

Although the punch guide 3 is guided by the guide post 13 and reaches the upper turret hole 9 by free fall, the inclined portion 5 provided on the lower shoulder portion of the punch guide 3 and the inclined portion provided on the upper turret hole 9 are provided. 11 allows easy insertion into the upper turret hole 9. Further, since the guide key 33 provided in the upper turret hole 9 and the guide groove 31 of the punch guide 3 are also provided with the inclined portions 35 and 37, the punch P maintains the predetermined directionality and the upper turret 7 is held. Be attached to.

From the above results, the punch P drops straight into the upper turret hole 9 by the action of the guide post 13 provided on the upper turret 7. Also, the lower shoulder portion of the punch guide 3 and the inclined portions 5, 11 of the upper die portion of the upper turret hole 9
Thus, the punch P is stored inside the upper turret hole 9. At this time, since the inclined portions 35 and 37 are also provided in the guide key 33 of the upper turret hole 9 and the guide groove 31 of the punch guide 3, the punch P is mounted on the upper turret 7 while maintaining a predetermined directionality. It

The present invention is not limited to the examples of the above-described embodiment, but can be made by making appropriate changes.
It can be implemented in other aspects. For example, although the plurality of guide posts 13 are used as the guide portions in the above-described embodiment, the same action and effect can be obtained by using a guide wall having a circular curved surface instead.

[0047]

As described above, in the punch mounting method in the punch press according to the first aspect of the present invention, the punch gripper holding the punch is moved above the predetermined upper support member hole of the upper support member. At this time, since the guide portion is provided around the hole of the upper support member at a position where a space for allowing the punch to enter with a certain margin is provided, the punch can be positioned by the guide portion. In this state, when the punch gripper releases the punch and drops it by its own weight, even if the punch is slightly displaced from the upper support member hole, it can be guided to the guide portion and mounted in the upper support member hole.

In the method for mounting a punch in the punch press according to the second aspect of the invention, when the punch is dropped, the inclined portion or the partial arc portion provided on the lower shoulder portion of the punch guide is the upper shoulder of the upper support member hole. Since it slides with respect to the inclined portion or the partial arc portion provided in the part, even if the center of the punch is deviated from the center of the upper supporting member hole, the punch can be guided to and mounted in the central portion of the upper supporting member hole.

In the punch press of the invention according to claim 3,
Since the guide portion, which is provided around the hole of the upper support member on the upper surface of the upper support member and secures a space slightly larger than that of the punch, determines the position of the punch, the punch gripper easily moves the punch to a predetermined position. be able to. At this position, the punch gripper releases the punch and drops it, but since the guide portion guides the punch to the upper support member hole, it is possible to guide the punch to the upper support member hole even if the punch is inclined or the center is displaced. You can

In the punch press of the invention according to claim 4,
The inclined portion or the partial arc portion provided on the lower shoulder portion of the punch guide slides down on the inclined portion or the partial arc portion provided on the upper shoulder portion of the upper support member hole, and the center portion of the upper support member hole. Therefore, the punch can be securely attached.

In the punch press of the invention according to claim 5,
Since the inclined portion or the partial arc portion is provided on the upper shoulder portion of the guide key, the guide key easily engages with the guide groove provided on the punch guide. Therefore, the directionality of the punch is surely determined.

In the punch press of the invention according to claim 6, the lower shoulder portion of the punch guide, the upper shoulder portion of the upper support member hole, and the inclined portion provided at the upper end shoulder portion of the punch guide are 45 °. Since the slope is steep below, the punch can be surely dropped into the upper support member hole and mounted even if the punch is slightly inclined.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of a turret punch press using a punch mounting method according to the present invention.

FIG. 2 is an explanatory view showing an inclined portion or a partial arc portion of a punch guide and an upper turret hole.

FIG. 3 is an explanatory diagram showing a state in which a punch is inserted at an angle with respect to an upper turret hole.

FIG. 4 is a plan view showing a punch gripper.

FIG. 5 is an explanatory diagram showing a state in which a punch is inserted into an upper turret hole.

FIG. 6 is a front view showing a general turret punch press.

FIG. 7 is a plan view showing a general turret punch press.

FIG. 8 is a cross-sectional view showing a general punch and die.

[Explanation of symbols]

 1 Turret Punch Press (Punch Press) 5, 11, 35, 37 Inclined Part 7 Upper Turret (Upper Support Member) 9 Upper Turret Hole (Upper Support Member Hole) 13 Guide Post (Guide Part) 19 Punch Gripper 33 Guide Key 109 Lower Turret (lower support member) P punch D die

Claims (6)

[Claims] 1. A punch is mounted in a hole of an upper support member of a punch press for punching by cooperation of a punch mounted on an upper support member and a die facing the punch and mounted on a lower support member. A method, wherein the punch gripper holding the punch is moved / positioned above the upper support member hole at a position determined by a guide portion provided on the upper surface of the upper support member,
A method of mounting a punch in a punch press, wherein the punch gripper is used to release the punch, and the punch is attached to the hole of the upper support member by being guided to a guide portion by the weight of the punch itself dropping. 2. The inclined portion or the partial arc portion provided on the lower shoulder portion of the punch guide of the punch slides with respect to the inclined portion or the partial arc portion provided on the upper shoulder portion of the upper support member hole. The punch mounting method in a punch press according to claim 1, wherein the punch is guided to the center of the hole of the upper support member. 3. A punch press that performs punching by cooperation between a punch mounted in an upper support member hole of an upper support member and a die facing the punch and mounted in a lower support member. A guide portion that forms an inscribed circle slightly larger than the punch around the upper support member hole on the upper surface of the upper support member is provided, and an inclined portion or a partial arc portion is provided at the upper shoulder portion of the upper support member hole. Punch press characterized by becoming. 4. The punch press according to claim 3, wherein an inclined portion or a partial arc portion is provided on a lower shoulder portion of the punch guide of the punch. 5. The punch press according to claim 3, wherein an inclined portion or a partial arc portion is provided on an upper shoulder portion of the guide key provided in the upper support member hole. 6. The punch press according to claim 3, 4 or 5, wherein the inclined portion is chamfered at 45 ° or less.