JPS6116232B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a copying device in which the machining point continuously changes back and forth on the machining surface, for example, a corrugated plate is erected on the flat surface of a square pipe, This relates to a copy processing device that welds along the edge of a corrugated plate.

(Prior art) When performing such a welding process, as shown in FIG. A processing tool (torch) 4 supported so as to be able to slide back and forth together with the stylus is provided toward the edge of the corrugated plate, and the stylus is set at a constant height and moved in the processing direction while following the irregularities of the corrugated plate 2. I move it around and weld it.

(Problems with the prior art) However, due to thermal deformation during welding, the square pipe 1 warps and distorts the joint surface with the corrugated plate 2, causing vertical displacement on the joint surface, and the height remains constant. Conventional profiling equipment set at

However, even if a stylus is provided that contacts the top surface of the square pipe, the stylus will come off the surface of the square pipe as the processing tool retreats on the convex part of the corrugated plate, causing a detection error. If the position of the torch is deviated in the processing direction, the stylus will hit the convex part of the corrugated board and prevent the processing tool from moving forward, making it impossible to maintain the torch position correctly.

Note that distortion due to warping changes depending on variations in the material of the workpiece, warping, shape and length of the material, and processing conditions, so it is necessary to predict the amount of variation corresponding to the distortion and program the torch movement. is difficult, and there is a problem that welding accuracy is unstable.

(Means for Solving the Problems) The present invention has been made to solve these problems, and provides a stylus that allows a processing device to make vertical tracing by contacting the processing surface, that is, the top surface of a square pipe. The stylus is provided to swing, and when the stylus swings on the convex portion of the corrugated plate and tilts from the center position, tracing in the upper and lower positions is interrupted and only effective detection is performed.

(Structure of the Invention) The present invention will be described in detail below with reference to an embodiment shown in FIGS. 2 to 8.

In the figure, 1 is a square pipe, 2 is a corrugated plate, 3 is a stylus that copies the unevenness of the corrugated plate 2, 4 is a processing tool (torch), 5 is a vertical copying device,
Reference numeral 6 denotes a support arm to which the vertical copying device 5 is attached, and is provided to protrude from the main body of the processing device. This processing device main body supports the stylus 3 and torch 4 so that they can move back and forth (left and right).
It is designed to be able to move in both directions and up and down. Therefore, the vertical copying device 5 and the torch 4 move in the processing direction and in the vertical direction, but do not move in the longitudinal direction. Reference numeral 7 denotes a support body attached to the support arm 6, and the middle part of the stylus support piece 9 is pivotally supported on the lower surface of the tip part via a horizontal shaft 8 so that both ends thereof can be rotated in the vertical direction. Reference numeral 10 denotes a stylus for vertical scanning, which is attached to the tip of the stylus support piece 9 via a bearing 11 so as to be swingable only in the left and right directions by a vertical shaft 12, with the tip touching the top surface of the square pipe 1. The upper surface of the square pipe 1 is set to become a reference horizontal plane when the square pipe 1 is in a horizontal state, for example. 13 is the support 7
A differential transformer inserted into the mounting hole 14 of
The tip of the rod 15 is connected to the stylus support piece 9.
It is pressed against an inclined surface 16 provided at the rear end, and when the stylus 10 is in a horizontal position, the output becomes a neutral point of 0, and when the stylus 10 is lowered, the rod 15 protrudes and descends into the main body of the processing device. When a command is issued to lower the torch position and the stylus 10 is raised, the rod 15 is pushed in and is set to issue a raise command to the main body of the processing device. Reference numeral 17 denotes a limit switch for turning on and off command signals for raising and lowering the processing tool from the differential transformer 13, and connects the tip of the operating rod 18 to the stylus 10.
It is in pressure contact with an arc-shaped cam 19 provided at the rear end, and when the stylus 10 swings to the right or left and the actuating rod 18 comes off the cam 19 and protrudes, the differential transformer 13 rises and falls. command signal
It is set to turn off. Reference numeral 20 denotes an elastic body, such as a coil spring, which is inserted between the support body 7 and the stylus support piece 9 to bias the stylus 10 downward and hold it at the center position in the swinging direction.

(Operation) The operation of the copying device with such a configuration, especially the vertical copying device, will be described.

First, as shown in FIG. 5, the stylus 10 for vertical scanning is positioned in the recess of the corrugated board 2 together with the stylus 3 and the torch 4. At this time, the tip of the stylus 3 is in contact with the surface of the corrugated board.

In this state, the tip of the stylus support piece 9 is pushed down by the elastic body 20, the inclined surface 16 of the stylus support piece 9 is pushed up, and the rod 15 of the differential transformer 13 protrudes beyond the neutral point, causing the differential A descending command is issued from the dynamic transformer 13 to the main body of the processing apparatus.

Therefore, the vertical copying device 5 moves down in the direction of arrow A together with the torch 4 and the stylus 3, and as shown in FIG.
When the stylus 10 and the stylus support piece 9 rotate in the direction of arrow B about the horizontal axis 8, and the stylus 10 is in a horizontal state, the rod 15 of the differential transformer 13 It is pushed by the inclined surface 16 of the support piece 9, slides backward, returns to the neutral point, and stops the descending command.

In this state, the torch 4 is set at the optimum position, and starts machining while moving in the direction of arrow D from this point.

During the machining process, if the surface of the square pipe 1, which is the machining surface, is displaced upward due to warping, the stylus support piece 9 tilts in the direction of arrow B through the stylus 10, and the differential transformer 13 accordingly tilts. The rod 15 is pushed by the inclined surface 16 in the direction of arrow C, and issues an ascending command to the main body of the processing device. Conversely, if the displacement due to the warp of the square pipe 1 is downward, the stylus 10 will tilt downward, and the rod 15 of the differential transformer 13 will protrude in the opposite direction to the arrow C, leading to the main body of the processing device. Issue a descending command.

In this way, the stylus 10 contacts the side surface of the convex portion of the corrugated plate 2 due to the movement of the vertical copying device 5 in the processing direction (arrow D). , vertical axis 1
The stylus 10 swings in the direction of the arrow E while giving a twist to the elastic body 20 about 2. Therefore, the cam 19 at the rear end of the stylus 10 comes off from the actuating rod 18, operating the limit switch 17 and turning off the signal from the differential transformer 13. As a result, the main body of the processing device
Regardless of the vertical movement of 0, the height before the OFF state is maintained and processing continues.

When the stylus 10 passes over the convex portion of the corrugated plate 2, the stylus 10 returns to its original central position due to the restoring force caused by the twisting of the elastic body 20, and at the same time, the cam 19 pushes the operating rod 18 of the limit switch 17 backward. Then, the signal from the differential transformer 13 is turned ON and vertical scanning is started again. Thereafter, this operation is repeated to perform machining while performing accurate vertical tracing.

The elastic body 20 is not limited to a spring, but may be made of rubber or the like, and the elastic body 20 may be provided separately for pressing the stylus support piece 9 and for returning the stylus 10.

(Effects of the Invention) Since the copying device of the present invention has such a configuration, even if the machined surface of a square pipe, etc. is displaced in the vertical direction due to thermal deformation, etc., it is possible to copy the actual shape in the vertical direction as well as copy the shape. It is possible to carry out machining while performing the process, and it is possible to perform accurate machining. In addition, since the stylus that traces the machined surface swings due to the unevenness of the workpiece, it does not interfere with the movement of the processing device in the processing direction, and detection is interrupted during this period, so even if the stylus comes off the machined surface, it will not be erroneous. There is no ivy detection, and tracing errors are eliminated, making it possible to perform extremely reliable machining.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a perspective view showing an embodiment of the present invention, and Fig. 3 is a side view showing the structure of the vertical copying device in Fig. 2, partially shown in cross section. ing. FIG. 4 is a plan view showing the relationship between the stylus and limit switch in FIG. 3, and FIGS. 5 to 8 are explanatory diagrams showing the operation of the vertical copying device in the present invention. 4 is a processing tool, 5 is a vertical copying device, 6 is a support arm,
7 is a support body, 8 is a horizontal axis, 9 is a stylus support piece,
10 is a stylus, 11 is a bearing, 12 is a vertical shaft, 1
3 is a differential transformer, 15 is a rod, 16 is an inclined surface, 17 is a limit switch, 18 is an operating rod, 19 is a cam, and 20 is an elastic body.

Claims (1)

[Claims] 1 Equipped with a processing device main body that moves in the processing direction (left and right) and in the vertical direction, and a processing tool that is supported by the processing device main body so that it can move back and forth, so that the processing position continuously changes back and forth on the processing surface. A copying processing device includes a support protruding from the main body of the processing device, a stylus support piece that is pivotally supported on the support body by a horizontal shaft so as to rotate in the vertical direction, and a stylus support piece that is rotated in a fixed direction. An elastic body is used to hold the rotation, and the tip of the stylus support piece is elastically supported by a vertical axis so that it can swing only in the left and right directions and return to the center position, and the tip touches the processing surface and moves up and down the processing surface. A stylus that follows the displacement in the direction, a differential transformer that operates according to the vertical rotation of the stylus support piece via the stylus, and a differential transformer that operates only when the stylus is held at the center position. A copying processing device that is equipped with a limit switch that detects the output, and adjusts the vertical position of a processing tool using the output of a differential transformer.