JPH04319026A - Method for fitting die holder and punch press - Google Patents

Abstract

PURPOSE:To provide a die holder fitting method possible to fit a die holder on a die holding base and a punch press by centering a die to a punch without using a centering jig. CONSTITUTION:In a turret punch press 1 where an upper turret 25 having a punch 23 and a lower turret 29 having a die 27 are faced vertically to each other, the die holder 39 having this die 27 is arranged freely adjustable by a small amt. and fixable on this lower turret 29 under a condition having prescribed directional property, a centering means 75 to center a die 27 to a punch 23 when this punch 23 is lowered and the tip of the punch is inserted into a die hole 27H, a fixing device 45 to fix a die holder 39 to the lower turret 29 after the die 27 is centered by this centering means 75 to the punch 23, and an operating equipment 47 to operate this fixing device 45 are provided as characteristics.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press and a method for attaching a die holder that can easily attach a die holder that holds a die in a predetermined direction to a die holding base.

0002

[Prior Art] In a punch press such as a turret punch press, which has an upper turret with a plurality of punches and a lower turret with a plurality of dies facing each other vertically, a punch press with a predetermined directionality is used. Conventionally, in order to attach a die holder that holds a die to a lower turret, the die holder is first held by the lower turret so that its position can be adjusted by a minute amount. Next, a centering jig is attached to the punch mounting part of the upper turret. Then, by lowering the centering jig and inserting the tip of the centering jig into the die hole, the die is centered with respect to the centering jig, in other words, the punch. After centering the die, the mounting bolts are appropriately tightened to secure the die holder to the lower turret.

0003

[Problem to be Solved by the Invention] However, conventionally, when attaching a die holder to a lower turret (an example of a die holding base), a centering jig is used which is detachably attached to the punch mounting section. Therefore, it is necessary to attach a centering jig to the punch mounting part of the upper turret (an example of a punch holding base), or to remove the centering jig from the punch mounting part, which takes time. There was a problem that the process was complicated and the work was complicated.

Therefore, in order to solve the above-mentioned problems, the present invention provides a die holder mounting method that allows the die to be centered with respect to the punch and the die holder to be mounted on the die holding base without using a centering jig. An object of the present invention is to provide a method and a punch press.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention is characterized by comprising the following steps as a first means.

(i) A step in which a die holder that holds a die in a predetermined direction is held on a die holding base so that the position can be adjusted by a minute amount.

(ii) After the above step (i) is completed, the punch vertically opposed to the die is lowered so that the tip of the punch enters the die hole of the die and the core of the die is aligned with the punch. The process of serving.

(iii) After the above step (ii) is completed, a step of fixing the die holder to the die holding base.

As a second means, in a punch press having a punch holding base provided with a punch and a die holding base provided with a die vertically opposed to each other, the above-described process is performed under a condition having a predetermined directionality. The die holder that holds the die,
Centering means is provided on the die holding base so that the position can be adjusted and fixed by a minute amount, and that centers the die with respect to the punch when the punch is lowered and the tip of the punch enters the die hole. and a fixing device for fixing the die holder to the die holding base after centering the die with respect to the punch by the centering means, and an actuating device for actuating the fixing device. shall be.

0010

[Operation] In the above structure, first, the die holder, which holds the die in a predetermined direction, is held on the die holding base so that its position can be adjusted by a minute amount.

Next, by lowering the punch vertically opposed to the die, the tip of the punch enters the die hole of the die. At this time, the die is centered with respect to the punch by appropriately operating the centering means.

[0012] Then, the die holder is fixed to the die holding base by activating the actuating device and appropriately operating the fixing device.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will now be described with reference to the drawings.

Referring to FIG. 5, a turret punch press 1 as an example of a punch press has pillars 5 and 7 integrally erected at the front and rear (left and right in FIG. 5) of a lower frame 3.
Further, an upper frame 9 is provided on the pillars 5 and 7 to constitute a frame body.

A fixed table (not shown) for supporting the plate material W is provided on the upper surface of the lower frame 3, and a movable table 11 is mounted on the left and right sides (front and back in FIG. 5) of this fixed table via rails 13. It is provided so that it can move freely in the front and rear directions.

A moving positioning device 15 is provided to move and position the plate material W to be punched. More specifically, a carriage base 17 constituting a part of the moving positioning device 15 is fixed to the left and right movable tables 11, and the carriage base 17 is equipped with a clamp device 19 for gripping the plate material W. A carriage 21 is mounted so as to be movable in left and right directions.

On the rear side of the fixed table, an upper turret 25 for holding a plurality of punches 23 is provided, and a lower turret 29 for holding a plurality of dies 27 is provided vertically facing each other. The upper turret 25 is rotatably provided on the upper frame 9 via a rotating shaft 31, and the lower turret 29 is rotatably provided on the lower frame 3 via a rotating shaft 33. Further, the upper turret 25 and the lower turret 29 can be synchronously rotated by a predetermined angle in the same direction via a turret servo motor (not shown). The punch 23 is movable up and down with respect to a punch guide 35 attached to the upper turret 25 (see FIG. 1).

A striker 37 for striking a predetermined punch 23 is provided above the upper turret 25 in the upper frame 9 so as to be movable up and down.

With the above configuration, by moving the movable table 11 in the front-back direction and moving the carriage 21 in the left-right direction, the plate material W gripped by the clamp device 19 is placed at a predetermined position between the upper turret 25 and the lower turret 31. Move and position. Furthermore, as described above, before or at the same time as moving and positioning the plate material W,
The upper turret 25 and the lower turret 31 are rotated by appropriately operating the turret servo motor to place the upper mold 2 in a predetermined position.
3. Position the lower mold 27 vertically below the striker 35. Then, by lowering the striker 35 and pressing a predetermined upper die 23, the plate material W can be punched in a desired manner.

Next, the main parts of this embodiment will be explained.

Referring to FIG. 1, a plurality of die holders 39 hold the die 27 in a predetermined direction.
is provided on the lower turret 29 so that its position can be adjusted by a minute amount. That is, the lower turret 29 is provided with a plurality of mounting steps 41 at appropriate intervals in the circumferential direction, and each mounting step 41
A die holder 39 is provided in the die holder 39 so that the position can be adjusted and fixed by a minute amount. Further, each die holder 39 can hold the die 27 in a predetermined direction via a positioning key and a key groove (not shown). Die holder 3
On the upper side of 9 is a die space 4 that abuts the side of the die 27.
3 are removable.

After centering the die 27 with respect to the punch 23, each die holder 39 is attached to the corresponding mounting step 41.
A fixing device 45 for fixing the fixing device 45 is provided, and an actuating device 47 for actuating the predetermined fixing device 45 is provided.

Regarding the details of the fixing device 45, a plurality of threaded portions 49 are provided on the lower side of each die holder 39, and a fixing bolt 51 is screwed into each threaded portion 49. Each fixing bolt 51 passes through a through hole 53 provided in the lower turret 29, and a spring washer 55 and a flat washer 57 are provided between the head of each fixing bolt 51 and the lower turret 29. .

Regarding the details of the actuating device 47, the lower frame 3 has a
A first guide member 59 is provided which extends to, and a first slider 61 is provided to this first guide member 59 so that its position can be freely adjusted in the front-rear direction. This first slider 61 has a second guide member 63 extending in the left-right direction (front and back direction in FIG. 1).
The second guide member 63 is provided with a second slider 65 whose position can be adjusted in the left-right direction. The first slider 61 and the second slider 65 can be moved via a servo motor and a ball screw, respectively, which are not shown.

The second slider 65 has an elevating cylinder 6.
7, and a drive shaft 69 connected to the lifting cylinder 67 is integrally provided with a socket wrench 73 that can be engaged with an engaging portion 71 provided on the head of the fixing bolt 51. Note that the drive shaft 69 can be rotationally driven via a drive motor.

With the above configuration, by adjusting the position of the first slider 61 in the front-back direction and adjusting the position of the second slider 65 in the left-right direction, the socket wrench 73 can be moved up and down to the engagement portion 71 of the predetermined fixing bolt 51. can be opposed to. Next, the socket wrench 73 is raised by operating the lifting cylinder 67 appropriately, and the socket wrench 73 is raised.
is engaged with the engaging portion 71. By rotating the drive shaft 69 via the drive motor, the fixing bolt 51 can be tightened or loosened. When the fixing bolt 51 is tightened, the die holder 3
9 is in a fixed state with respect to the mounting step 41, and when the fixing bolt 51 is loosened, the die holder 39 is in a state where the position can be adjusted by a minute amount with respect to the mounting step 41.

A centering means 75 is provided for centering the die 27 with respect to the punch 23 before the die holder 29 is fixed to the mounting step 41 via the fixing device 45 and the actuating device 47. That is, the die 27 has a plurality of centering holes 77 corresponding to the punches 23.
A plurality of centering pins 79 are provided which can be engaged with the centering pins 79 . Note that the punch guide 35 is provided with a through hole 81 through which the centering pin 79 can pass. With the above configuration, the fixing device 45,
After operating the actuating device 47 appropriately to allow the position of the die holder 39 to be adjusted by a minute amount to the mounting step 41, the striker 37 is lowered and the punch 23 is pressed, thereby opening the through hole 35H provided in the punch guide 35. The tip of the punch 23 enters the die hole 27H through , and the striker 37 is further moved to a predetermined lowest lowering height position (a lower height position than the lowest lowering height position during normal punching).
By lowering the centering pins 39 to the corresponding centering holes 79 through the through holes 81, the plurality of centering pins 39 can be respectively engaged with the corresponding centering holes 79. With this engagement, the die holder 3
Reference numeral 7 is a device whose position can be adjusted by a minute amount to center the die 27 with respect to the punch 23.

Note that during normal punching, even if the striker 35 descends to its lowest height position, the centering pin 79 does not protrude from the lower side of the punch guide 35.

2 instead of the centering means 25 shown in FIG.
There is no problem even if a centering means 83 shown in FIG.

Regarding the details of the centering means 83, an intrusion hole 85 is provided below the mounting step 41 in the lower turret 29, and this intrusion hole 85 is provided in the die holder 37.
An entry hole 87 communicating with is provided. The lower frame 3 is provided with an elevating body 89 that enters and retreats through the penetration holes 85 and 87 and is movable up and down in the vertical direction. be. The elevating body 89 is provided with a plurality of centering pins 91, and the centering pins 91 can be engaged with centering holes 93 provided in the punch 23 via the through holes 81.

With the above configuration, after the die holder 39 can be freely adjusted in position by a minute amount on the mounting step 41, the elevating body 9
1 are respectively engaged with the corresponding centering holes 93, and the die 27 can be centered with respect to the punch 23.

Instead of providing the centering means 75, 83, centering means 95 made of a clearance adjustment sheet as shown in FIG. 3 may be provided. Therefore, after making the position of the die holder 39 adjustable by a minute amount on the mounting step 41, the punch 23 is lowered and the punch 2
3 into the die hole 27H, the clearance adjustment sheet 95 is aligned with the punch 23 and the die hole 27H.
The die 27 can be centered with respect to the punch 23 by entering between the punches 23 and 23.

Instead of providing the above-mentioned centering means 75, 83, and 95, centering means 97 as shown in FIG. 4 may be provided. It is what it is. therefore,
By lowering the punch 23 after making the position of the die holder 39 adjustable by a minute amount on the mounting step portion 41, the tapered portion 99 provided on the punch 23 engages with the die hole 27H, and the die 27 is moved relative to the punch 23. It is possible to perform centering.

Next, the outline of this embodiment will be explained, including its operation.

The punch 23 is attached to the upper turret 25 in a predetermined direction, and the die holder 3 holds the die 27 in a predetermined direction.
9 is mounted and held on the lower turret 29 so that its position can be freely adjusted by a minute amount.

Next, the upper turret 25 and the lower turret 2
9 is rotated to position the punch 23 and die 27 vertically below the striker 37, and then the striker 37 is lowered to allow the tip of the punch 23 to enter the die hole 27H. At this time, the die 27 can be centered with respect to the punch 23 by appropriately operating the centering means 75 (83, 95, 97) as described above.

The die holder 39 is fixed to the lower turret 29 by appropriately operating the aforementioned actuating device 47 to actuate the fixing device 45 appropriately.

As described above, according to this embodiment, when attaching the die holder 39 to the lower turret 29, it is not necessary to use a centering jig that is detachably provided at the punch mounting portion of the upper turret 25 as in the conventional case. Since the die 27 is centered with respect to the punch 23, the upper turret 2
There is no need to attach a centering jig to the punch mounting portion of No. 5 or to remove the centering jig from the punch mounting portion. Therefore, the attachment work of the die holder 39 can be carried out in a short time, and the work efficiency is improved.

Next, a second embodiment will be explained.

Referring to FIGS. 6 and 7, the lower turret 2
9 is provided with a plurality of mounting recesses 101, and each mounting recess 101 has a die 27 in a predetermined direction.
A truncated cone-shaped die holder 103 that holds the die is provided so that its position can be adjusted by a minute amount.

[0041] The centering means 75 (83, 95, 97)
In order to fix the truncated conical die holder 103 after centering the die 27 with respect to the punch 23 by appropriately operating the An actuation device 107 is provided for actuation.

More specifically, a plurality of pressing members 109 constituting a part of the fixing device 105 are provided in the mounting recess 101 so as to freely move toward and away from the side surface of the die holder 103. The pressing surface 109a is formed in a shape corresponding to the side surface of the die holder 103. Further, an engagement pin 113 is attached to the pressing member 109, which engages with an engagement hole 111 provided in the side surface of the die holder 103 when the pressing surface 109a abuts the side surface of the die holder 103. In order to move each pressing member 109 in the above-mentioned approach and separation direction, a hydraulic cylinder 115 that constitutes a part of the actuating device 107 is provided in the mounting recess 101, and a piston rod 117 that can freely protrude from each hydraulic cylinder 115 is provided in the mounting recess 101. It is connected to a corresponding pressing member 109 via a connecting pin 119.

A protective cover 121 is provided above the mounting recess 101 to cover the fixing device 105 and the actuating device 107.

With the above configuration, a plurality of hydraulic cylinders 11
5 as appropriate to move the plurality of pressing members 109 in a direction approaching the side surface of the die holder 103.
The pressing member 109 can press the side surface of the die holder 103 and fix the die holder 103 to the mounting recess 101. In addition, the die holder 103 and the pressing member 109 are connected to each other via a plurality of hydraulic cylinders 115.
By releasing the pressed state, the position of the die holder 103 can be adjusted by a minute amount with respect to the mounting recess 101.

Note that instead of providing the die holder 103 in the shape of a truncated cone, a die holder 123 in the shape of a truncated cone (for example, a truncated triangular pyramid) may be provided as shown in FIGS. 8 and 9. The second embodiment also has the same functions and effects as the first embodiment.

Furthermore, the present invention is not limited to the description of the embodiments described above, but can be implemented in various other forms by making appropriate changes.

[0047]

Effects of the Invention As can be understood from the above description of the embodiments, according to the present invention, when attaching the die holder to the die holding base, a centering jig that is detachably provided on the punch mounting portion is provided. Since the die is centered with respect to the punch without being used, it is necessary to attach a centering jig to the punch mounting part of the punch holding base or to remove the centering jig from the punch mounting part. Therefore, the die holder installation work can be done in a short time, which has the effect of improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing main parts of a first embodiment.

FIG. 2 is a diagram showing another embodiment of the centering means.

FIG. 3 is a diagram showing another embodiment of the centering means.

FIG. 4 is a diagram showing another embodiment of the centering means.

FIG. 5 is a side view of the turret punch press.

FIG. 6 is a diagram showing main parts of a second embodiment.

FIG. 7 is a view taken along line VII-VII in FIG. 6;

FIG. 8 is a diagram showing another aspect of the die holder.

FIG. 9 is a diagram taken along line IX-IX in FIG. 8;

[Explanation of symbols]

1 Turret punch press 23 Punch 25 Upper turret 27 Die 29 Lower turret 39 Die holder 45 Fixing device 47 Actuating device 75, 83, 95, 97 Centering means 103 Die holder 105 Fixing device 107 Actuating device 123 Die holder

Claims (2)

[Claims] 1. A method for attaching a die holder, comprising the following steps. (i) A step in which a die holder that holds a die in a predetermined direction is held on a die holding base so that the position can be adjusted by a minute amount. (ii) After the above (i) process is completed, by lowering the punch that is vertically opposed to the die, the tip of the punch enters the die hole of the die, and the die is centered with respect to the punch. Process. (iii) After the above step (ii) is completed, a step of fixing the die holder to the die holding base. [Claim 2] A punch press comprising a punch holding base provided with a punch and a die holding base provided with a die vertically opposed to each other, the die being held in a predetermined direction. A die holder is provided on the die holding base so that its position can be adjusted and fixed by a minute amount, and when the punch is lowered and the tip of the punch enters the die hole, the die is centered with respect to the punch. A fixing device is provided for fixing the die holder to the die holding base after centering the die with respect to the punch by the centering means, and an actuating device for actuating the fixing device. A punch press characterized by: