JPS58184067A - Method and apparatus for automatic working of three- dimensional curved surface - Google Patents

Abstract

PURPOSE:To perform titled working by setting a value in accordance with dimension indicated in the drawing of a position to be worked to a controlling device, controlling a measuring device by above-mentioned value to perform measurement and controlling a working device by corrected measured value, and thereby moving the tip of the working device according to the indicated dimension. CONSTITUTION:For instance, the dimension indicated in the drawing of a nozzle hole is inputted to controlling devices 16, 17. A rotary table 18 is driven by a driving motor 14 basing on a command from the device 16, and the center of the nozzle hole is made to coincide with the center line in the left and right directions of a main shaft 5. An arm 7 is controlled by an output signal of a driving system controlling device 15 inputted through the device 17, and sets the center to the position of the center of nozzle hole. A measuring terminal 10 at the tip of the arm 7 measures the shape of a place to be cut and worked automatically and the measured value and a prescribed dimension are compared and corrected by the device 17. The corrected value is programmatically inputted from the device 17 to the device 15, and the tip of a cutting torch 12 travels automatically according to an output signal of the device 15 along the worked face keeping a fixed distance from the work 18, and cuts the nozzle hole.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic processing method and apparatus for three-dimensional curved surfaces,
In particular, the present invention relates to an automatic processing method and apparatus suitable for performing a combined process of marking a reference line and cutting a welding groove on a nozzle hole and a flange end surface in a spherical end plate that has been subjected to mold processing. .

The end plate of a pressure vessel or the like has a three-dimensional curved surface, and because it is generally subjected to mold processing, there is a large error in the dimensions from the drawing, and it is difficult to obtain uniform processing accuracy. Therefore, it is very difficult to automate secondary processing after heavy processing, such as cutting of welding grooves for nozzle holes.

Traditionally, scribing has been done manually, and beveling cutting has been done manually or by semi-automatic gas or plasma cutting, or by cutting with a machining allowance and using a machine tool. There is.

By the way, in order to automate the bevel cutting of the nozzle hole and the 7-lunge end face, the reference plate @ A, B etc. after plastic working as shown in Fig. 1 can be automated! As shown in Figure 2, attach the tip of the scribing and cutting torch 11° to the workpiece 1.
8 to a predetermined angle θ (angle with the vertical line),
In addition, it is necessary to maintain the height h at a constant height and move the workpiece 18 along a constant trajectory according to the curved surface shape of the workpiece 18 to obtain a predetermined score line and groove shape.

In this case, the tip of the torch is changed to a predetermined angle θ,
It is possible to control the moving trajectory at a constant level, but if the curved surface shape of the workpiece does not conform to the specified dimensions and is uneven individually or depending on the part, the relationship between the torch tip and the workpiece surface may be affected. The spacing fluctuates, making it impossible to obtain a predetermined score line and groove shape.

Because of the problems mentioned above, multi-purpose automatic processing equipment for marking and cutting grooves on workpieces such as end plates, which are semi-finished products, has not been put into practical use.

In order to solve the above-mentioned problems, the present invention aims to solve the above-mentioned problems. i Always keep the distance between the tip of processing equipment such as a cutting torch and the workpiece surface constant even if the workpiece is not processed to the specified dimensions, and follow the three-dimensional curved shape of the workpiece. The purpose is to automatically move the tip of the processing device according to the dimensions.

The present invention positions the eyelid to be processed, sets numerical values according to the drawing dimensions of the processed area in the control device, numerically controls the measuring device using the above-mentioned values, automatically measures the processed area, and transmits the second measured value to the control device. The shape error is automatically corrected by comparing it with the initial value, and the processing equipment is numerically controlled using the corrected value, so that the tip of the processing equipment maintains a constant distance from the processing location, and the distance between the processing equipment and the processing location is maintained constant. It is characterized by being able to automatically travel along the line.

An embodiment of the present invention will be explained below with reference to FIGS. 3 to 5. 1 and 1' are columns, and 2 is a frame fixed by the columns 1 and 1', on which a head 3 having a head drive motor 4 is attached so as to be slidable in the left-right direction (Y direction). 5
A hollow main shaft is attached to the head 3 so as to be moved vertically (in two directions) by the fine shaft drive motor 6;
Reference numeral 7 denotes an arm provided at the bottom of the main shaft 5. The driving force is transmitted from the drive motor 8 through the hollow part of the main shaft 5, and the angle can be changed in the direction of the arrow α.
It is rotatable through a hollow part. 10.11.12
1 is a measuring terminal, a scribing torch, and a cutting torch that are attached to the tip of the arm 7 for each process; 13 is a rotary table that can be rotated at a predetermined angle by a rotary table drive motor 14; 15 is the head drive motor 4. A drive system control device using numerical control for controlling the main shaft drive motor 6 and the drive motor 8.9; 16 is a control device for the rotary table drive motor 14;

17 is a control device for program-controlling the drive system control device W115, and 18 is a workpiece.

Next, the operation of the present apparatus will be explained using an example of cutting a nozzle hole in the workpiece 18.

(1) Control device 1 controls the drawing dimensions of the nozzle hole, which is the processing location.
6 and the control device [17].

(2) The rotary table 13 is driven by the rotary table drive motor 14 based on a rotation command from the control device 16, and rotates the workpiece 18 placed at a reference position in advance according to the scale on the rotary table 13. The center of the nozzle hole is made to coincide with the center line of the main shaft 5 in the left-right direction.

(3) The head drive motor 4I, the main shaft drive motor 6, and the drive motors 8 and 9 are driven according to the output signal of the drive system control device j15, which is programmed through the control device 17, and the arm 7 is moved vertically, horizontally, and vertically in the direction of the arrow shown in the figure. The directional movement and angular rotation are controlled, the center is set at the center position of the nozzle hole as programmed, and the arm 7 itself rotates.

(4) A measurement terminal 1O, which is set to a predetermined radius in advance, is attached to the tip of the arm 7, and the shape of the cutting location is automatically measured by the control described in (3) above.

Then, the signal is fed back from the measurement terminal 10 to the control device 17, and comparison and correction between the specified dimension and the measured value is automatically performed.

(5) The numerical values corrected above are input into the program from the control device 17 to the drive system control device [15] as secondary commands. Then, according to the output signal of the drive system control device 15, the head drive motor 4. The main shaft drive motor 6 and the drive motor 9 are driven by numerical control. Therefore, in this case, if the measurement terminal 10 is replaced with a cutting torch, the distance between the tip of the cutting torch and the workpiece 18 can be maintained at one foot.

The nozzle-sized cutting process is performed by automatically traveling along the work surface.

The same applies to scribing.

As described above, according to the above-mentioned embodiment, the device itself can create a program and automatically perform measurement and processing by simply inputting the predetermined drawing dimensions for complex processing of marking and cutting. , automation also improves processing accuracy and has a ripple effect on subsequent processes.

According to the present invention, there is an effect that the end portion of the processing device W1 can be automatically moved according to the dimensions along the three-dimensional curved shape of the workpiece.

[Brief explanation of the drawing]

! Figure J1 is a front view of an example of the workpiece 〇1chi which is the object of the present invention, Figure 2 is an explanatory diagram showing the relationship between the torch and the workpiece surface,
FIG. 3 is a plan view showing an embodiment of the apparatus of the present invention, FIG. 4 is a front view thereof, and FIG. 5 is a flowchart of the present invention. 1...Column, 2...Frame, 3.
...Head, 4...Head drive motor,
5... Main shaft, 6... Main shaft drive motor,
7... Arm, 8, 9... Drive motor, 10... Measuring terminal, 11... Marking torch, 12... Cutting Torch, 13...
・Rotary table, 14...Rotary table drive motor, b...Drive system control device, length 5m -3simpler-

Claims (1)

[Claims] 1. A measuring device is numerically controlled according to the drawing dimensions of the processing location,
Automatically measures the processing location of the workpiece, inputs this measured value into the control device, compares it with the initial value, automatically corrects the shape error, and numerically controls the processing device using the corrected value,
1. A method for automatically processing a three-dimensional curved surface, characterized in that the tip of the processing device maintains a constant distance from the processing location and automatically travels along the processing location. 2. The main shaft is attached to the frame provided above the rotary table on which the workpiece is placed so that it can move in two dimensions on a vertical plane, and the measuring device or processing device is attached to each of the main shafts, and the angle of the arm to be obtained is variable. and a rotary table control device for controlling the rotary table and a drive system control device for driving and controlling the main shaft and arm, and a control device for program-controlling the drive system control device. Automatic processing equipment for three-dimensional curved surfaces.