JPH0852520A - Punch press - Google Patents

Abstract

PURPOSE:To minimize damage to punch, die and deterioration of processing precision by eliminating off center between punch and die vertically facing each other. CONSTITUTION:A support frame 17 is integrally arranged between the tip parts of an upper frame 5 and lower frame 7 through a tie rod 19. A punch holding member 31 to support plural punches 29 is arranged at the tip part of this upper arm 21 and a die holding member 35 to hold plural dies 33 of the tip part of this lower arm 23 is arranged and a punching device 39 is arranged in the upper frame 5. The upper frame 5 is provided with a first upper plate 11 and second upper plate 13 which are vertically isolated, an intermediate member 45 is integrally arranged between the tip parts of first upper plate 11 and second upper plate 13, this intermediate member 45 is constituted so that it is bent in projecting shape in the horizontal direction by the heat generated from a punching device 39.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press for punching a plate material.

[0002]

2. Description of the Related Art A conventional punch press will be briefly described. A conventional punch press is based on a U-shaped base frame, and the base frame includes an upper frame and a lower frame that face each other vertically. Since the base frame is formed in a bridge shape, a U-shaped support frame is integrally provided between the tip of the upper frame and the tip of the lower frame via a tie rod. It has an upper arm and a lower arm facing each other. An upper turret (an example of a punch holding member) having a plurality of punches is provided at the tip of the upper arm, and a lower turret (die holding member of the die holding member having a plurality of dies is provided at the tip of the lower arm. One example) is provided on the upper turret so as to face each other vertically.

The upper frame of the base frame is provided with a punching device having a striker for pressing a predetermined punch. Here, the punching device includes, in addition to the striker, a hydraulic cylinder, a hydraulic circuit device, etc. in the case of a hydraulic punch press, and a crankshaft, a flywheel, a clutch brake, a drive motor in the case of a mechanical punch press. And so on.

[0004]

However, when the striker is driven up and down a number of times to perform punching, heat is generated in the punching device and the upper frame is thermally deformed in the horizontal direction as shown in FIG. A horizontal displacement occurs between the upper frame and the lower frame. Therefore, the upper turret and the lower turret are misaligned, and the punch and the die are misaligned. If punching is further performed under such a condition, damage to the die (punch, die) and processing accuracy are caused. There is a problem of causing deterioration of.

Therefore, an object of the present invention is to provide a punch press which can solve the above problems.

[0006]

In order to solve the above-mentioned conventional problems, in the present invention, as a first means, a U-shaped base frame provided with an upper frame and a lower frame facing each other vertically. In order to configure the base frame in a bridge shape, a support frame is integrally provided between the tip of the upper frame and the tip of the lower frame via a tie rod. The upper arm is provided with a punch holding member for holding an appropriate number of punches, and the lower arm has a punch holding member for holding an appropriate number of dies. The upper frame is provided with a punching device provided with a striker that presses a predetermined punch on the upper frame so as to face the holding member. Includes a first upper plate and a second upper plate that are vertically separated from each other. An intermediate member is integrally provided between the tip of the first upper plate and the tip of the second upper plate. It is characterized in that it is curved in a convex shape in the horizontal direction by the heat generated from the punching device.

As a second means, a U-shaped base frame having an upper frame and a lower frame facing each other vertically is provided, and the base frame is formed in a bridge shape. An L-shaped support frame is integrally provided between the tip portions of the lower frame via tie rods, a punch holding member having a plurality of punches is provided at the tip portion of the support frame, and a plurality of punch frames are provided on the lower frame. A die holding member provided with a die is vertically opposed to the punch holding member, a punching device provided with a striker for pressing a predetermined punch is provided on the upper frame, and the upper frame is a first upper part separated from each other. It has a plate and a second upper plate.
An intermediate material is integrally provided between the tip portion of the upper plate and the tip portion of the second upper plate, and the intermediate material is configured to be convexly curved in the horizontal direction by the heat generated from the punching device. It is characterized by

As a third means, in addition to the constitutional requirements of the first or second means, the intermediate member is constituted so as to be curved in a convex shape in the horizontal direction by the heat generated from the punching device. It is characterized in that a recess is provided on one side of the material.

[0009]

In the above construction, the plate material is moved in an appropriate direction and moved and positioned at a predetermined position between the punch holding member and the die holding member. Then, the striker in the punching device is driven downward to press the predetermined punch, whereby punching can be performed by cooperation of the predetermined punch and the die. By appropriately repeating the above operation, it is possible to perform a desired punching process corresponding to the product shape on the plate material.

When the striker is driven up and down a number of times during punching, heat is generated in the punching device, and the upper frame tends to be thermally deformed in the horizontal direction. However, since the intermediate plate is configured to be bent in the horizontal direction by the heat, the tip portions of the first upper plate and the tip portions of the second upper plate move in the approaching vertical direction, and It is possible to absorb horizontal thermal deformation.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, the turret punch press 1 according to the present embodiment is based on a U-shaped base frame 3, which is vertically (in FIGS. 1 and 2). An upper frame 5 and a lower frame 7 facing each other (up and down), and a support frame 9 integrally connecting the upper frame 5 and the lower frame 7 are provided. Here, the upper frame 5 and the lower frame 7 extend in the front-rear direction (the left-right direction in FIG. 1, the front-back direction toward the paper surface in FIG. 2), and the upper frame 5 is opposed to the first upper plate 11 vertically. , Second upper plate 1
3, and side plates 15 provided on both the left and right sides of the upper plates 11 and 13 (front and back facing the paper in FIG. 1, left and right in FIG. 2).

Since the base frame 3 is formed in a bridge shape, a U-shaped support frame 17 is provided between the front end portion (tip portion) of the upper frame 5 and the front end portion (tip portion) of the lower frame 7 as a tie rod. The support frame 17 is integrally provided via 19 and has an upper arm 21 and a lower arm 23 which are vertically opposed to each other. The tie rod 19 includes an upper fixing nut 25 and a lower fixing nut 27.
It has.

An upper turret 31 for holding a plurality of punches 29 is provided at the rear end (tip) of the upper arm 21.
In addition, a lower turret 35 that holds a plurality of dies 33 is provided at the rear end (front end) of the lower arm 23 so as to face the upper turret 31 in the vertical direction. The upper turret 31 and the lower turret 35 rotate in the same direction by a predetermined rotation angle in synchronization with the drive control of a turret servomotor (not shown).

A punching device 39 having a striker 37 for pressing a predetermined punch 29 is provided at the center of the upper frame 7. Here, punching device 39
In addition to the striker 37, is provided with a ram 41 connected to the striker 37, a hydraulic cylinder 43 for moving the ram 41 up and down, a hydraulic circuit device (not shown) for operating the hydraulic cylinder 43, and the like. A crankshaft, a flywheel, and a clutch brake may be used instead of the hydraulic cylinder 43 and the hydraulic circuit device.

The tip of the first upper plate 11 and the second
Tie rod 19 between the tips of the upper plate 13
A plurality of intermediate members 45 and 47 are integrally provided before and after. Then, the heat generated from the punching device 31 causes the plurality of intermediate members 45 and 47 to be convexly curved in the horizontal direction (horizontal left direction) so that the plurality of recesses are provided on the rear side of each of the intermediate members 45 and 47. 49 is formed.

The operation of this embodiment will be described based on the above configuration.

The plate material is moved forward and backward and leftward and rightward to move and position it to a predetermined position between the upper turret 31 and the lower turret 35, and the turret servomotor is drive-controlled to synchronize the upper turret 31 and the lower turret 35. Then, the punch 29 and the die 33 are rotated by a predetermined rotation angle to be positioned vertically below the striker 37. By operating the hydraulic cylinder 43 to drive the striker 37 downward together with the ram 41 to press the predetermined punch 29, punching can be performed by the cooperation of the predetermined punch 29 and the die 33.
By appropriately repeating the above operation, it is possible to perform a desired punching process corresponding to the product shape on the plate material.

When the striker 37 is driven up and down a number of times during punching, heat is generated in the punching device 39, and the upper frame 5 is thermally deformed in the horizontal direction (horizontal left direction) as shown in FIG. Tend to occur. However, since the intermediate members 45 and 47 are configured to be bent in the horizontal direction by the heat, the tip portions of the first upper plate 11 and the tip portions of the second upper plate 13 approach each other as shown in FIG. By moving in the vertical direction, it is possible to absorb the horizontal thermal deformation of the upper frame 5.

As described above, according to this embodiment, the upper frame 5 is heated by the heat generated by the punching device 39.
However, since the intermediate members 45 and 47 are bent in the horizontal direction by the heat, the tip portions of the first upper plate 11 and the tip portions of the second upper plate 13 move in the vertical direction. Thus, the horizontal thermal deformation of the upper frame 5 can be absorbed. Therefore, it is possible to eliminate the misalignment between the punch 29 and the die 33 that are vertically opposed to each other, and to prevent damage to the punch 29 and the die 33 and deterioration of the processing accuracy as much as possible.

[0021]

As will be understood from the above description of the embodiments, according to the present invention, the upper frame tends to be thermally deformed by the heat generated by the punching device. Since it bends in the horizontal direction, the front end portion of the first upper plate and the front end portion of the second upper plate move in the vertical direction in which they approach each other, and the horizontal thermal deformation of the upper frame can be absorbed. Therefore, it is possible to eliminate the misalignment between the punch and the die which are vertically opposed to each other, and to prevent the punch and the die from being damaged and the machining accuracy from being deteriorated.

[Brief description of drawings]

FIG. 1 is a schematic side view of a turret punch press of this embodiment.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is an operation explanatory view of the present embodiment.

FIG. 4 is an explanatory diagram of a conventional frame modification.

[Explanation of symbols]

 1 Turret Punch Press 3 Base Frame 5 Upper Frame 7 Lower Frame 11 First Upper Plate 13 Second Upper Plate 17 Tie Rod 21 Upper Arm 23 Lower Arm 29 Punch 31 Upper Turret 33 Die 35 Lower Turret 37 Striker 39 Punching Device 45, 47 Intermediate Material 49 Recess

Claims (2)

[Claims] 1. A U-shaped base frame having an upper frame and a lower frame which are vertically opposed to each other is provided, and since the base frame is configured in a bridge shape, a tip portion of the upper frame and a tip portion of the lower frame. A supporting frame is integrally provided via a tie rod between the upper and lower arms, and the supporting frame is provided with an upper arm and a lower arm which are vertically opposed to each other, and a punch holding member for holding an appropriate number of punches at the tip of the upper arm. And a die holding member for holding an appropriate number of dies at the tip of the lower arm so as to face the punch holding member vertically, and a punching device equipped with a striker for pressing a predetermined punch on the upper frame. And the upper frame is vertically spaced apart from the first frame.
An upper plate and a second upper plate are provided, and an intermediate material is integrally provided between the tip portion of the first upper plate and the tip portion of the second upper plate, and the intermediate material is generated from the punching device. A punch press characterized in that it is configured so as to be convexly curved in the horizontal direction by heat. 2. The concave portion is provided on one side of the intermediate material, because the intermediate material is configured to be curved in a convex shape in the horizontal direction by the heat generated from the punching device. Punch press as described.