JPH11314127A - Method for automatically exchanging die in punch press and device for automatically exchanging die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speed-up the movement after receiving data and to enable use of a die having clearance which is not optimum according to a user's judgement even in case that not all clearances are prepared. SOLUTION: In the automatic die exchanging method of a punch press 1, the die mounted freely attachably/detachably to a prescribed position in a turret station is exchanged into a die to be exchanged which is stocked in a die stocking part 3 and selected according to a die arrangement instruction after receiving the die arrangement instruction. In the die arrangement instruction, a turret number for instructing the position where the die is to be mounted in a turret station, a storage number for instructing the punch to be used among the punches P held in a punch holding shelf and a die number for instructing the die to be used among the dies D held in a die holding shelf are given in one block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic die changing apparatus and method for punch presses.

[0002]

2. Description of the Related Art For example, a main frame of a turret punch press is provided with a turret station comprising a disc-shaped rotatable upper turret and a lower turret, and a plurality of punches are provided on the upper turret in a circumferential direction. The lower turret is also provided with a plurality of dies at appropriate intervals in the circumferential direction.

A punch and a die are held by a punch holder and a die holder, respectively, and the punch holder and the die holder are detachably provided in a horizontal direction with respect to a holder mounting portion formed on each turret.

[0004] At a position adjacent to the turret punch press, a mold storage device for stocking a plurality of molds to be exchanged with a mold arranged at the turret station, and a mold provided at the turret station. And a mold exchanging device for exchanging the mold with a mold provided in the mold accommodating device.

[0005] In this turret punch press, a required mold is taken out of a mold storage device by a mold exchanging device in accordance with a machining program, and is replaced with a mold arranged in a turret station. Is performed on the workpiece.

Conventional punch presses have a concept that a punch and a die are set one-to-one. Therefore, a data creating machine (automatic programming device) usually has a punch shape,
The dimensions are registered, and machining program data is created based on the dimensions.

[0007]

However, when machining program data is created based only on the shape and dimensions of the punch, the die is automatically adjusted by a material (work thickness) having a plurality of clearances per punch. Can not create data for operating a punch press with a die exchange mechanism, which needs to be replaced.

[0008] In some cases, die clearance is provided as information. However, based on the clearance information, a mechanism for judging which die to use from the data is required in the NC device, and the process is started. It takes a long time for the machine to start moving. Also, when you install a mold that does not have all the clearances,
In some cases, the machine stops or a clearance different from the one intended by the user is used, resulting in defective processing.

In order to solve the above problems, the present invention provides
Even if there is a die with multiple clearances for one punch, it is possible to create data that can automatically change the mold, speed up the operation after receiving the data, and make all clearances It is an object of the present invention to provide an automatic die changing apparatus and a die automatic changing method in a punch press, which can use a die having a clearance that is not optimal according to a user's judgment even when the dies are not prepared.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a mold arrangement for exchanging a mold arranged in a turret station with an exchange mold arranged in a mold stock section comprising a punch storage shelf and a die storage shelf. The turret command indicates which position of the exchange mold is to be placed in the turret station, a storage number indicating which punches to use among the punches placed on the punch storage shelf, and a die storage shelf. And a die number for designating which die to use among the dies arranged as a single block.

That is, the arrangement positions (addresses) of the dies (punches and dies) to be arranged on the turret station, the punch storage shelf and the die storage shelf are determined, and those addresses are commanded as one block. By doing so, it is easy to know which die is used for which punch,
You can reduce mistakes when correcting data,
The control unit (NC unit) after receiving the data does not need to determine the shape and dimensions of the mold, and the processing speed is increased. In addition, since the die information is not the shape, size and clearance but address information, the control unit (NC unit) does not judge the command, and the actual operation of the machine is performed quickly.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

<Structure of Automatic Die Changer> As shown in FIG. 1, the automatic die changer in the punch press according to the present embodiment includes a punch press 1 for performing a desired punching process on a work, and Mold stock unit 3 for stocking a mold for supplying another mold (replacement mold) to a mold disposed at a turret station of the turret, and a mold exchange as a changer for exchanging molds. Part 5 and CAD /
A CAM unit 7, an NC unit 9 of the punch press body for controlling the mechanical operation of the punch press 1, and an NC unit 11 which is a control unit of an automatic exchange device for controlling the operations of the mold stock unit 3 and the mold exchange unit 5. It is composed of

As shown in FIGS. 2 and 3, the punch press 1 mainly has a work transfer section for moving the work W to a processing position for positioning, and a punching section for performing desired punching processing on the work W. Do it.

The work transport section includes a fixed table 17 provided in a substantially rectangular gap 15 opening at the center of a frame 13 having a frame structure, and a pair of movable tables 19 and 19 provided on both sides thereof. , These movable tables 1
A carriage base 21 for connecting the carriages 9 and 19, and a carriage 2 movably provided on the carriage base 21;
3 and clampers 25, 25 for clamping the work W provided on the carriage 23.

The carriage base 21 is movable in the direction of the arrow Y-axis in FIG. 3 integrally with the movable tables 19, 19 by a Y-axis drive motor 27 provided at the left end of the frame 13. The carriage 23 movably provided on the carriage base 21 is movable in the direction of arrow X in FIG. 3 by an X-axis drive motor 29.

The punching section comprises a turret station for detachably disposing the punch P and the die D, and a ram 31 for hitting the punch P disposed at the processing position. The turret station includes an upper turret 35 rotatably provided on the upper frame 33, and a lower frame 37.
And a lower turret 39 rotatably provided at The upper turret 35 has a disk shape, and a plurality of types of punches P having different shapes and dimensions are detachably arranged along the circumferential direction. Similarly, the lower turret 39 has a disk shape, and a plurality of types of dies D having different shapes and dimensions are also detachably arranged along the circumferential direction.

In this turret station, the upper turret 35 is made smaller than the lower turret 39 so that the die D mounted on the lower turret 39 can be easily replaced, and the respective turret rotating shafts 41, 43. Are provided eccentrically. Thus, the upper part of the die D at the die exchange position is not covered by the upper turret 35, and thus the die exchange operation becomes easy.

The ram 31 is provided on the upper frame 33 so as to be vertically movable, and includes an upper turret 35 and a lower turret 39.
Rotates to strike the punch P indexed and positioned at the processing position. As a result, a desired punching process is performed on the work W by the punch P being hit and the die D facing the punch P.

As shown in FIG. 1, the punch press 1 having the above-described structure is driven and controlled by an NC unit 9 of the punch press body. The NC unit 9 is provided with a CPU (arithmetic unit) 81.
U81 reads the machining program 83 and instructs the punch press 1 to perform desired punching on the work W. The punch press 1 performs a desired punching process on the work W according to the command.

The mold stock section 3 has a punch storage shelf 49 and a die storage shelf 51 which are mounted on a shelf rotation shaft 47 rotatably provided at the center of a base frame 45. The shelf rotation shaft 47 is provided with a shelf rotation servomotor 53.
The rotation is controlled by an NC unit 11 of an automatic exchange device to be described later.

The punch storage shelf 49 is formed as a storage shelf (storage) having a disk shape.
It is provided at a position higher than 1. A plurality of types of punches P are arranged on the punch storage shelf 49 so as to be detachable in the circumferential direction. Similarly, one die storage shelf 51 is also formed as a disk-shaped storage shelf, and is provided below the punch storage shelf 49. The die storage shelf 51 has a number of stages corresponding to the number of the clearances in order to arrange several types of dies D having different clearances prepared for one punch P according to the thickness of each work. . For example, when three types of clearances are prepared, three die storage shelves 51 are prepared.

In each of the die storage shelves 51, dies D arranged for each clearance are removably arranged along the circumferential direction. For example, when three die storage shelves 51 are provided, the die D having a clearance of 0.15 mm is arranged in the upper die storage shelves 51 and the middle die storage shelves 51 are arranged.
, A die D having a clearance of 0.3 mm is arranged, and a die D having a clearance of 0.4 mm is arranged in the lower die storage shelf 51. Further, as shown in FIG.
The dies D having the respective clearances corresponding to the punches P are arranged on the respective die storage shelves 51 on the same line as the punches P arranged in 9 (on the same line in the vertical direction). In this manner, a setting error such as the direction of the punch P and the die D can be easily visually confirmed.

The mold exchanging section 5 is a changer mechanism for taking out the mold mounted on the upper turret 35 and exchanging it with another mold stocked in the punch storage shelf 49. The punch holding section holds and holds the punch P. 53, a die holding unit 55 for gripping and holding the die D, and a punch elevating unit 57 and a die elevating unit 59 that allow these to move up and down.

The punch elevating section 57 is provided with a base frame 45.
Is provided on a ball screw 63 provided vertically between the tip of a guide frame 61 erected at the base and the base frame 45, and is vertically movable by a punch up / down servomotor 65 and the ball screw 63. I have. Similarly,
The die lifting / lowering portion 59 is also movable up and down by a ball screw 67 and a die lifting / lowering servomotor 69.

The punch holding section 53 is attached to the tip of a punch exchanging arm 71 which is rotatable with respect to the punch elevating section 57, and the die holding section 55 is similarly mounted on the die elevating section 5
9 is attached to the tip of a die exchanging arm 73 which can be freely rotated. And these punch exchange arms 71
The die exchange arm 73 is rotatable in a horizontal plane by a spline shaft 75 provided vertically between the end of the guide frame 61 and the base frame 45, gear mechanisms 77 and 79, and a servomotor 87 for rotation. ing.

The mold stock unit 3 and the mold exchanging unit 5 having the above configurations are controlled by the NC unit 11 of the automatic exchanging device. The NC unit 11 is provided with a CPU (arithmetic unit) 85, and the CPU 85
9 is read out, and a mold placement command to be described later is commanded to the mold stock unit 3 and the mold exchanging unit 5, and the drive of the mold stock unit 3 and the mold exchanging unit 5 is controlled based on the command.
The mold placement command is created by the CAD / CAM unit 7.

<Creation of Data of Die Arrangement Instruction> Next, a method of creating data of a mold arrangement instruction will be described. The mold placement command is created (set) simultaneously with the machining program when creating the machining program in the CAD / CAM section 7 shown in FIG. The mold arrangement command is issued as a T code (tool code).

The T code is, for example, ****. * Indicates a turret number (an address where a mold is to be arranged) at which position in the turret station an exchange mold is to be arranged, and □ indicates which punch among the punches P arranged on the punch storage shelf 49 is to be used. Indicates a storage number (address at which the punch P is arranged), and △ indicates a die number (shelf number of the die D) indicating which die among the dies arranged on the die storage shelf 51 is to be used.

The turret number, the storage number, and the die number will be described in more detail. The turret number indicates an address indicating a set position of a mold arranged at a predetermined position in a circumferential direction of the turret station. Display with numbers. Similarly, the storage number is
It indicates the set position of the punch P arranged at a predetermined position in the circumferential direction of the punch storage shelf 49, and is indicated by, for example, a three-digit number. On the other hand, the die number indicates the number of the shelf. For example, the upper (first) shelf is displayed as 1, the middle (second) shelf is displayed as 2, and the lower (third) shelf is displayed as 3.

Before setting the mold arrangement command, first, the exchange molds to be mounted on the mold stock unit 3 are listed, and it is confirmed whether or not the die D having a necessary clearance exists. Next, it is determined on which stage of the die storage shelf 51 the die D of which clearance is to be placed. For example, the first-stage die storage shelf 51 has a die D with a clearance of 0.15 mm, and the second-stage die storage shelf 51 has a die D with a clearance of 0.3 mm.
The dies D having a clearance of 0.4 mm are placed on the die storage shelves 51 at the tier.

Then, mold location management data 89 including the punch P and the die D is created. For example, as shown in Table 1, the mold location management data 89 indicates whether or not the punches P are arranged at the respective punch arrangement positions (storage numbers) of the punch storage shelf 49 by using symbols ○ and ×, and The presence or absence of each die D on the same line as the punch P is represented by the same symbol. ○ indicates that there is a punch P or a die D, and x indicates that there is no punch P or a die D. Here, the shape and dimensions of the mold can also be input as information for maintenance of the mold.

In Table 1, the die 1 is the first die storage shelf 51, the die 2 is the second die storage shelf 51, and the die 3 is 3
It shows the die storage shelf 51 of the tier. The turret number column is initially blank. In this field, when the mold moves to the turret station according to the machining program, the turret number is input.

[0034]

[Table 1] Next, the CAD / CAM unit 7 creates the die arrangement pattern PT1 of the stage having the largest number of dies D mounted thereon as shown in Table 2. In Table 2, the turret number, the storage number, and the die number are input as well as the shapes and dimensions of the punch P and the die D. And this mold arrangement pattern,
Copies are made for the remaining stages of the die storage shelf 51. In the present embodiment, since the die storage shelves 51 are provided in three stages, the die arrangement patterns PT2 arranged on the remaining two die storage shelves 51,
Create PT3. The die number of the copied mold arrangement pattern is changed according to each stage, and the mold having no die D corresponding to the clearance is deleted. In the case where the mold is used infrequently and does not have an appropriate clearance, and another clearance may be used, the die number of the die D to be used is input, for example, as shown in a portion surrounded by a square in Table 3. I do.

As described above, the mold arrangement patterns PT1 to PT3 corresponding to the shelf of each die storage shelf 51 are created and registered. Mold arrangement pattern PT1 to PT
3 sets a name so that the clearance corresponding to each die storage shelf 51 can be understood. For example, as shown in the upper right of the upper column in Table 2, the display is such as a plate thickness T1 mm to T2 mm. Then, when creating a machining program in the CAD / CAM section 7, mold placement patterns PT1 to PT3 suitable for the thickness and material of the work W to be used are selected, and the mold layout is automatically or manually performed by a person. I do.

[0036]

[Table 2]

[Table 3] <Method of Automatic Die Change> Next, a method of automatic die change in the above-described punch press will be described. The CPU 85 in the NC unit 11 of the automatic exchange device outputs a mold arrangement command to the mold stock unit 3 and the mold exchange unit 5. Here, the die arrangement command is issued as a T code in which the turret number, the storage number, and the die number are one block.

Then, in response to the command, a storage number corresponding to the command is searched from the mold location management data 89, and if the storage number includes a mold, the mechanical operation of the mold exchanging unit 5 is performed. By mold stock part 3
Of the punch P and the die D from the die storage shelf 51, respectively.

Then, the punch P and the die D taken out by the mold exchanging section 5 are set at the turret station of the die number corresponding to the mold arrangement command.
When the punch P and the die D are set in the turret station, the turret number is written in the turret column of the mold location management data 89 shown in Table 1.

As described above, in the present embodiment, the die arrangement command is issued as one block in which the turret number, the storage number, and the die number are indicated by the T code. It is easy to see whether the data is correct, and it is possible to reduce errors when correcting the data.
There is no need to judge the size, and the processing speed is increased. That is,
Since the die information is not the shape / dimension or the clearance but the address information, the NC unit does not judge the command, and the actual operation of the machine is performed quickly.

When an address for a die is provided separately from a T code for a punch, if a person mistakenly deletes only one at the time of editing NC data, there is a possibility that the machine or the mold may be damaged. However, since a combination of a punch and a die is instructed by one block of T code, even if deletion or erroneous change is made, an alarm or at worst can be reduced to a processing defect due to punching with inappropriate clearance.

Further, since the die registration in the CAD / CAM unit 7 (automatic programming device) can set the die number arbitrarily, even if the dies D for the number of stages are not prepared, it cannot be said that the die is optimal. A clearance mold can be used.

As described above, a specific embodiment to which the present invention is applied has been described. However, the present invention can be variously modified without being limited to the above-described embodiment.

In the above embodiment, the present invention is applied to a turret punch press, but the same effect can be obtained by applying the present invention to a punch press without a turret. In a punch press without a turret, a die placement command is issued as one block including a station number or a storage number where a die is placed and a die number.

[0044]

The present invention is embodied in the form described above and has the following effects.

According to the present invention, since the mold arrangement command is issued as one block in which the turret number, the storage number, and the die number are indicated by the T code, which die is used for which punch. Can be easily determined, and errors during data correction can be reduced.

Further, according to the present invention, since the NC section after receiving the data does not need to determine the shape and dimensions of the mold, the processing speed is increased.

Further, according to the present invention, since the die registration in the CAD / CAM section (automatic programming device) can be set to any die number, the user can judge even if the dies D for the number of stages are not prepared. A mold with less than optimal clearance can be used, preventing the machine from stopping.

[Brief description of the drawings]

FIG. 1 is a block diagram of an automatic die changing apparatus in a punch press according to an embodiment.

FIG. 2 is a front view of the automatic die changing apparatus in the punch press according to the embodiment.

FIG. 3 is a plan view of an automatic die changing device in the punch press according to the present embodiment.

FIG. 4 is a schematic diagram showing a state in which several types of dies having different clearances are arranged on the same line as a punch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch press 3 Die stock part 5 Die exchanging part 7 CAD / CAM part 9 NC part of punch press main body 11 NC part of automatic exchange device 49 Punch storage shelf 51 Die storage shelf

Claims (4)

[Claims] 1. A punch storage shelf for arranging a plurality of types of punches at predetermined positions, and several types of dies having different clearances prepared according to the thickness of each work for one punch arranged on the punch storage shelf. Has a die stock unit with a die storage shelf consisting of a plurality of shelves arranged on each shelf and arranged on each shelf so as to be on the same line as the punch. A mold that is detachably provided at a predetermined position in the turret station,
A method for automatically changing a die in a punch press, which is selected according to the die placement command and replaces the replacement die stocked in the die stock unit, wherein the die placement command is transmitted to the turret station. A turret number indicating which position the exchange mold is to be arranged, a storage number indicating which punch is to be used among the punches arranged on the punch storage shelf, and a die number of the die arranged on the die accommodation shelf. An automatic die changing method in a punch press, wherein a die number indicating which die to use is specified as one block. 2. The mold placement command is to list the exchange molds to be mounted on the mold stock section and confirm the presence or absence of a die having a necessary clearance. Decide whether to place the die or not, and create a mold arrangement pattern for the shelf with the largest number of dies,
The mold arrangement patterns are copied for the number of the remaining stages of the die storage shelf, the die numbers are changed according to the stages, the mold arrangement patterns corresponding to the respective shelf stages are created, and the mold arrangement patterns are 2. The method according to claim 1, wherein the method is performed by selecting a mold arrangement pattern to be used from the inside. 3. A mold comprising a punch and a die removably arranged in a turret station of a punch press,
Based on a mold placement command, in a die automatic exchange device in a punch press, which replaces with a replacement mold selected according to the mold placement command among a plurality of replacement dies arranged in a mold stock unit. A plurality of different types of punch storage shelves for disposing the plurality of types of punches at predetermined positions, and clearances prepared for one punch disposed on the punch storage shelves in accordance with the thickness of each workpiece. Each die
An automatic die changing apparatus for a punch press, comprising: a plurality of die storage shelves arranged for each clearance and arranged on each shelf so as to be on the same line as the punch. 4. A turret number indicating a position of the turret station at which the exchange mold is to be arranged, and a punch to be used among punches arranged on a punch storage shelf, wherein the turret station designates the position of the exchange mold. 4. A control unit for instructing, as one block, a storage number for instructing a die and a die number for instructing which die among die arranged on a die accommodating shelf. An automatic die changing device in the punch press described.