JP2592045Y2 - Punch press - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention relates to a punch press having a large number of punches (tools).

(Prior art) Conventionally, for example, in a turret punch press as a punch press, if the X and Y coordinates are arbitrarily set by an NC device, the work is moved to the processing position, and the work is actually punched out. The position of the punched hole is measured, and the coordinates of each tool are set by comparing with the set amount set in advance.

That is, the difference Δx, Δy (Δx = x−x ₀ , between the actually measured displacement amount (x, y) and the preset command value (x ₀ , y ₀ ))
Δy = y−y ₀ ) is manually input to the NC parameters corresponding to each station. Then, Δx, Δ generated for each station in the NC machining program
An NC machining program was created by inputting the value of y as an offset amount, and the machining accuracy was improved to correspond to actual punching.

(Problem to be Solved by the Invention) In the above-described conventional coordinate system setting, it is necessary to actually test-work a work and manually input Δx and Δy as NC parameters. as a result,
It wastes time and labor. In addition, since the mold (tool) is actually used, it is affected by the state of the mold (abrasion degree, backlash), and it is difficult to cope with a change in accuracy over time.

The purpose of this invention is to measure the actual displacement from the machine origin to each tool provided at the machining position, without actually performing trial machining of the workpiece, in order to improve the above problems,
An object of the present invention is to provide a coordinate system automatic setting device for a machine tool which can automatically set a coordinate system.

(Means for Solving the Problems) In view of the conventional problems as described above, the present invention includes a plurality of punches and dies for punching a plate material,
In a punch press equipped with a work movement positioning device capable of moving and positioning a plate material in the X and Y directions with respect to a punch and a die of a processing device, when the work movement positioning device is located at the home position, A displacement sensor is provided in the work movement positioning device, and a striker capable of pushing down and holding each punch arranged at the processing position at a measurement position is provided so as to be vertically movable, and the work is moved with respect to the punch pushed down by the striker. The center position of each punch is calculated based on the coordinate value when the displacement sensor is moved and the displacement sensor is brought into contact with each of the punches at three different points, and the calculation result and a reference stored in a reference value memory in advance are calculated. An arithmetic processing unit for calculating a relative error with respect to each punch is provided for each punch. Crowded taken as a meter provided a correction processing unit for transferring the NC machining program memory is made as automatically correcting constituting the relative error for each punch.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

The machine tool used in the present invention is applied to a machine having a work movement positioning device for moving a work in a horizontal direction. In this embodiment, a turret punch press will be described as an example.

Referring to FIG. 6, the turret punch press 1 is provided with a portal-shaped frame 3 on which a rotatable upper and lower turrets 5, 7 are supported. In addition, a plurality of mounting holes are formed at opposite positions on the circumference of the lower turrets 5 and 7, and a punch and a measuring jig are provided in the mounting holes of the upper turret 5. Dies corresponding to the punches are mounted in the mounting holes, respectively.

A processing position C (punch center) is provided at a part (the right end in FIG. 6) of the upper and lower turrets 5 and 7, and a punch and a die indexed to this processing position cooperate. In order to at least perform the punching, the frame 3 is provided with a drive unit having a vertically movable striker and ram. The drive device uses a hydraulic servo, a mechanical servo, an AC servo, or the like, and has a mechanism capable of positioning the striker at an arbitrary position.

A center table 9 is provided on the front side (the right side in FIG. 6) of the frame 3, and a movable table 11 is provided on the left and right sides (up and down in FIG. 6) of the center table 9. In FIG. 6, a carriage pace 13 is provided on the right end of the movable table 11, and the carriage base 13 is moved in the Y-axis direction together with the movable table 11 by a Y-axis motor such as a servo motor (not shown). It is to be moved.

In addition, the carriage base 13 is provided with a carriage 15 movable in the X-axis direction by an X-axis motor such as a servo motor (not shown), and the carriage 15 is provided with a work clamp for clamping a work. . Further, a displacement sensor 19 is attached to the lower end of the carriage 15 in FIG.

The position of the displacement sensor 19 in FIG. 6 is the mechanical origin M (0,0) in the turret punch press 1. Therefore, from the mechanical origin M (0,0), the machining position C
The distance (reference value) is set, and the coordinates of the processing position C are C (x ₀ , y ₀ ).

The carriage base 13, the carriage 15, and the work clamp are collectively called a work movement positioning device 21.

A punch or a measuring jig is mounted in a mounting hole in the upper turret 5. More specifically, as shown in FIG. 5, one of the plurality of mounting holes 23 provided on the circumference of the upper turret 5 is provided with a measuring jig 25 having a cross section of a circle or a square. It is installed. This mounting hole
A cutout groove 5V is cut out in the upper turret 5 at the upper part of 23, and a support block 27 slidable in the vertical direction is provided in the cutout groove 5V.

A lifter spring 29 urged upward is interposed between the flange portion 27F of the support block 27 and the bottom surface of the notch groove 5V. A flange 25F is provided on a part of the measuring jig 25, and the flange 25F rides on the flange 27F of the support block 27.

Above the processing position C, a striker 31 that moves up and down by a driving device provided on the frame 3 is provided on the frame 3 as shown in FIG. 5, and the striker 31 moves down in the state shown in FIG. In this state, the head of the measuring jig 25 is pressed to position the lower surface of the measuring jig 25 at the pass line PL. In this state, a displacement sensor 19 to be described later detects a gap ΔL between the pass line PL and the lower surface of the upper turret 5.
As shown by the arrow.

When the measuring jig 25 mounted in the mounting hole 23 of the turret 5 is in the state shown in FIG. 5, the workpiece movement positioning device 21 is moved in the X and Y axis directions, and the sensor mounting bracket 17 is mounted on the carriage 15. FIGS. 2 and 3 show a state in which the displacement sensor 19 attached via the shaft has moved to the processing position C. In FIG. 3, in order to reduce the measuring time, the shaded portion may be provided with a deceleration area to reduce the speed.

That is, the displacement sensor 19 moves from the mechanical origin M (0,0), enters the gap ΔL between the pass line PL and the lower surface of the turret 5, and performs measurement as shown in FIG. Displacement sensors 19 are provided on three sides of the jig 25
_Are located at the positions P ₁ , P ₂ , and P ₃ , for example, when they come into contact with each other, the three side coordinates of the measurement jig 25 are measured. From the coordinates of these three points, the center P ′ ₀ in the measuring jig 25 is obtained.
As shown in FIG. 4, P ′ ₀ (x, y) is calculated based on the mechanical origin M (0, 0).

The actual position P ′ ₀ (x, y) and the reference position P ₀ (x ₀ ,
The differences Δx and Δy from y ₀ ) are relative errors.

Δx = x−x ₀ , Δy = y−y ₀ The NC processing program is created by automatically correcting the offset amount parameter or all parameters for each tool in the NC device using the relative errors Δx, Δy as correction amounts. Executed.

FIG. 1 is a block diagram showing a configuration for setting a coordinate system in the turret punch press 1. In FIG. 1, for example, a reference value (x ₀ , y ₀ ) from the machine origin M (0, 0) to the center of the machining position C, a material of the work,
An input device 35 such as a keyboard for inputting a plate thickness, a punch, a die mounted on the upper and lower turrets 5 and 7, a number of the measuring jig 15, and the like is connected. An output device 37 such as a CRT is connected to the CPU 33 for outputting data and the like.

A reference value (x ₀ , y ₀ ) from the machine origin M (0, 0) to the center of the machining position C is set in advance, and is input from the input device 35 and temporarily stored in the reference value memory 39. . Also,
The CPU 33 has a displacement sensor 19 via an interface (I / F).
Is connected, the upper turret 5 is rotated to index the measuring jig 25 or the punch at the processing position C, and the number of the measuring jig 25 or the punch is input.

For example, the measuring jig 25 indexed to the processing position C is lowered by the striker 31, and the lower surface of the measuring jig 25 is
With the workpiece positioned at the PL, the workpiece movement positioning device 21 is moved to the processing position C and the displacement sensor 19 is brought into contact with, for example, three side surfaces of the measurement jig 25. The center coordinates (x, y) of the actual measurement jig 25 are measured based on the three coordinates, and are temporarily stored in the actual coordinate position / memory 41.

The reference value (x ₀ ,
y ₀ ) and the actual coordinate value (x, y) stored in the actual coordinate position / memory 41 are taken into the arithmetic processing unit 43.
In this arithmetic processing unit 43, Δx = xx− ₀ , Δy = yy− ₀
Is performed to determine the relative errors Δx and Δy. The obtained relative errors Δx and Δy are used as correction processing units 45.
And a correction process is performed. That is, the coordinates at the machining position C are corrected by Δx and Δy, transferred to the NC machining program memory 47, and rewritten.

Punching is performed based on the rewritten NC processing program.

As described above, without actually performing the punching on the work, the center position (x, y) of the measuring jig 25 or the punch attached to each of the mounting holes 23 is determined by the displacement sensor 19 using the mechanical origin M.
It can be measured as the actual coordinate position from (0,0). Also, the measured actual coordinate position (x, y) is compared with a reference value (x ₀ , y ₀ ) to determine a relative error (Δx, Δy), and a correction system is automatically set to set a coordinate system. can do.

Therefore, since the coordinate system can be automatically set, human labor is not required, and high-precision machining can be performed. That is, the accuracy correction operation is automated. Also,
Since the measurement including the influence of the turret inclination or the like is possible, a highly accurate correction value can be obtained.

The present invention is not limited to the embodiment described above, but can be implemented in other modes by making appropriate changes. For example, in the present embodiment, the displacement sensor 19 has been described as a contact displacement sensor, but may be a non-contact displacement sensor. Also, the turret punch press 1 has been described as an example of the machine tool,
Machine tools provided with other workpiece movement positioning devices 21 can also be used. In particular, it is effective for a machine tool such as an ATC device that exchanges tools or blocks as needed.

[Effects of the Invention] As can be understood from the above description of the embodiment, in short, the present invention includes a plurality of punches and dies for punching a plate material, and a punch and a die at a processing position (C). In a punch press provided with a work movement positioning device (21) capable of moving and positioning a plate material in the X and Y axis directions, when the work movement positioning device (21) is located at the home position, A displacement sensor (19) is provided in the work movement positioning device (21), and a striker (31) capable of pushing down and holding each of the punches arranged in the processing position (C) at a measurement position is provided so as to be vertically movable.
The workpiece movement positioning device (21) is moved with respect to the punch pressed down by the striker (31), and the displacement sensor (19) is brought into contact with each of the punches at three different points based on coordinate values. Then, the center position of each punch is calculated, and the relative error (Δx, Δy) between the calculation result and the reference value (x ₀ , y ₀ ) stored in advance in the reference value memory (39) is calculated for each punch. An arithmetic processing unit is provided, and a correction processing unit (45) is provided for taking the relative error (Δx, Δy) of each punch as an offset amount parameter and transferring the offset amount parameter to the NC machining program memory (47). The configuration is such that the relative error is automatically corrected.

As is apparent from the above configuration, in the present invention,
A displacement sensor provided in a work movement positioning device 21 that can move and position a work in the X and Y directions in a punch press
19, the center of each punch is calculated based on the coordinate values when the three points of each punch at the processing position C are brought into contact with each other, and the relative error between the calculation result and a preset reference value is calculated. However, in the present invention, the punches in the processing position are pressed down to the measurement positions by the striker 31 in the present invention. Even if there are many punches, the relative error for each of a large number of punches can be automatically and easily obtained, and the processing by automatically correcting the relative error for each of a large number of punches is easy. .

That is, according to the present invention, a relative error for each of a large number of punches in a punch press can be automatically obtained,
In addition, the automatic correction is easy, and the error correction can be easily and efficiently performed efficiently even though there are many punches.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main part of the present invention, in which a coordinate system is set, and FIG. 2 is a state in which a workpiece movement positioning device provided with a displacement sensor is brought close to a measuring jig mounted on an upper turret. 3 is a plan view of FIG. 2 and FIG. 4 is a center P at a processing position C. The actual relationship diagram between the coordinate values P _'0 of the measuring jig, Figure 5 is a side view of the state of being indexed lower the measurement jig mounted to the mounting hole of the turret to a machining position when, sixth FIG. 1 is a plan view of a turret punch press according to an embodiment of the present invention. 1: Turret punch press (machine tool) 5: Upper turret, 19: Displacement sensor 21: Work movement positioning device 25 ... Measuring jig, 33 ... CPU 39 ... Reference value / memory 41 ... Actual coordinate value / memory 43 ... Arithmetic processing unit, 45: Correction processing unit 47: NC machining program / memory

Claims (1)

(57) [Scope of request for utility model registration] A work movement positioning device (21) comprising a plurality of punches and dies for punching a plate material, and capable of moving and positioning the plate material in the X and Y directions with respect to the punch and die at a processing position (C). ), The displacement sensor (1) located at the machine origin (M) when the workpiece movement positioning device (21) is located at the origin position.
9) is provided in the work movement positioning device (21), and a striker (31) capable of pressing down and holding each punch arranged in the processing position (C) at the measurement position is provided so as to be vertically movable, and is provided by the striker (31). The work movement positioning device (21) is moved with respect to the punch in a depressed state, and the displacement sensor (19) is brought into contact with the punch at three different points. An arithmetic processing unit for calculating a position and calculating a relative error (Δx, Δy) between the calculation result and a reference value (x ₀ , y ₀ ) previously stored in a reference value memory (39) for each punch; In addition, a correction processor (45) is provided which takes in the relative error (Δx, Δy) of each punch as an offset amount parameter and transfers it to the NC machining program memory (47), and automatically calculates the relative error for each punch. Configuration to correct Punch press characterized by comprising Te.