JPS60152B2 - 3D curve cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention tilts and moves a cutting torch in response to a detection signal from a detector that traces the cut lines on the front and back sides of a material to be cut, thereby cutting a three-dimensional curve. This invention relates to a three-dimensional curve cutting device.

Conventionally, NC equipment has been used to cut thick plate materials such as water turbine blades whose end surfaces require three-dimensional curve machining as shown in Figure 1, or by cutting the material to be cut 01 as shown in Figure 2. There are observers on the front and back sides, and person A follows the marking line 02 on the front side, and person B on the back side follows the marking line 0 on the back side.
Cutting torch 0 by the amount corresponding to the difference △x between 3 and cut 04
Cutting was performed by adjusting the angle of 5.

However, NC equipment has the disadvantage of being too expensive, and while the outsourced cutting method can use inexpensive equipment such as gas or plasma cutting, it requires two workers, and even if the workers are skilled, the cut surface is It has drawbacks such as unevenness. Further, if the cut surface is a weld joint, unevenness may cause welding conditions to fluctuate and cause welding defects. The present invention aims to solve the above-mentioned drawbacks of conventional three-dimensional curve cutting, and to provide an apparatus that can perform three-dimensional curve cutting at low cost and easily. A guide member having an arc-shaped guide surface is fixed to a support member that is movable and can be moved in a lateral direction perpendicular to the direction of cutting progress, and a cutting torch for welding the material to be cut is attached to the guide surface. a drive link parallel to the cutting torch, which is rotatable to an arm integrally attached to the support member; The cutting torch and the drive link are connected to each other by a connecting link, and a surface position detector is integrated with the supporting member to trace a scribed line following the cutting line on the surface of the material to be cut. A back side position detector is attached to the arm so as to be movable in the lateral direction, and the back side position detector is attached to the arm so as to be movable in the lateral direction. The present invention is characterized in that by engaging and moving the back surface position detector in the lateral direction, only the inclination angle of the cutting torch is changed while the front surface cutting position by the cutting torch remains unchanged.

Next, embodiments of the present invention are shown in the drawings, and the embodiments will be described in detail based on the drawings.

In the drawings, the left-right direction parallel to the paper surface is the lateral direction (left-right direction), and the direction perpendicular to the paper surface is the front-back direction. A truck 2 is attached to a horizontally installed rail 1 so as to be movable in the front and rear direction (cutting direction) along the rail 11, and an arm 3 is horizontally attached to this truck 2. The arm 3 is reinforced and kept horizontal by a reinforcing member 4 having one end attached to the truck 2 and the other end attached to the tip of the arm 3. A slide 6 is attached to the arm 3 so as to be movable left and right. A servo motor 8 is installed on a motor mount 7 that is integrated with the slide 6, and a worm 9 is attached to the drive shaft of the servo motor 8. Worm wheel 1 that meshes with this worm 9
It is supported by a river slide 6 and engages with a rack 5 attached to the side surface of the arm 3. Therefore, the servo motor 8
The slide 6 moves left and right by driving. Support member 1 supported by this slide 6 by a screw shaft 14
A semicircular angle adjustment guide (hereinafter abbreviated as guide) 12 to which the surface height position detection sensor 1 is fixed is fixed to 3 . The screw shaft 14 is connected to a worm wheel 15 installed horizontally above the slide 6, and this worm wheel 15 is connected to a worm wheel 15 attached to the drive shaft of the servo motor 6 installed on the motor mount 7. 1
It meshes with 7. Therefore, when the servo motor 16 is driven, the guide 12 moves up and down. The surface height position detection sensor 1 is fixed at a distance m from the center of the guide 12, and detects the distance from the surface of the workpiece 18 installed below the guide. Trace the marking lines for cutting position detection applied with paint for detection on the surface, and send these detection signals to the servo motors 8 and 1.
6, the feed servo motors 8 and 16 are activated. Guide 1
A cutting torch holding plate 22 is installed on the guide 12 and includes guide rollers 19, 20, and 21 that move along arcuate upper and lower surfaces that are guide surfaces of the cutting torch 2. Since the cutting torch 23 is attached to the cutting torch holding plate 22, the cutting torch 23 can move in an arc along the guide 12 and can freely change its inclination angle.
One ends of parallel connecting links 24 and 25 having the same length are rotatably pinned to two upper and lower portions of the cutting torch holding plate 22, respectively. Let these nodes be point b and point c. The other ends of the connecting links 24, 25 are rotatably pinned to a drive link 26 parallel to the cutting torch 23. If these nodes are f point and e point, these links 24 and 25
, 26 and the cutting torch holding plate 22, cb=
There is a relationship between flowers and cf=, and these links form a parallelogram link mechanism. One point on the extension of the drive link 26 is the arm 12 that is integrated with the guide 12.
It is rotatably pinned to a. This node point d serves as the fulcrum of the link mechanism. A support rod 28 having a rack 27 attached to its side surface is horizontally supported at the lower end of the vertical arm 12b extending downward from the arm 12a. A rear surface position detection sensor 29 is held at the tip of the support rod 28 for tracking a scribing line for detecting a cutting position, which is coated with paint for scribing detection on the rear surface of the workpiece 18 . Since the back surface position detection sensor 29 is fixed by the bolt 301, by adjusting the bolt 30, the mounting position of the back surface position detection sensor 29 can be selected according to the thickness t of the material to be cut 18. A transmission rod 31 is attached to the support rod 28 in parallel with the rear surface position detection sensor 29. The upper end of this transmission rod 31 is engaged with a connector 32 having a long hole attached to the lower end of the drive link 26, and the left and right movement of the back position detection sensor 29 is controlled by the links 24, 25, 2.
6 and the cutting torch 23. Connector 32 and transmission rod 3
Let the point of engagement with 1 be point i. The transmission rod 31 is fixed to the support rod 28 by a bolt 33 that adjusts the mounting position of the position detection sensor 29 on the machine. the vertical arm 12b
A servo motor 34 is fixed to the lower end of the servo motor 34, and a worm 35 is attached to the drive shaft of the servo motor 34. This worm 35 meshes with the support rod 2.
A worm wheel 36 that engages the eight side racks 27 is supported at the lower end of the vertical arm 12b. Therefore, the support rod 28 is moved left and right by the drive of the servo motor 34. This servo motor 34 is actuated by a detection signal from the back side position detection sensor 29 tracing the marking line. Next, an example of work using this embodiment will be explained. Third
The figure shows an example in which cutting is performed at an angle of 8 degrees with respect to the direction perpendicular to the surface of the material to be cut 18.

Cutting lines a and i are marked on the front and back surfaces of the material 18 to be cut. Marking lines g, h for position detection are drawn at a distance m away from the cutting lines a, j, following the cutting lines a, 1. Paint for position detection by the position detection sensor 11 is applied. This paint is used depending on the type of position detection sensor. The material to be cut 18 is placed horizontally between the front surface height position detection sensor 1 and the back surface position detection sensor 29, the cutting line a coincides with the extension of the center line of the guide 12, and the marking line g marks the surface height position detection sensor. It is installed under the sensor 11. The marking line g on the front surface and the marking line h on the back surface are offset by a distance n, that is, a cutting angle of 8. Therefore, if the back side position detection sensor 29 is aligned with the back side marking line h', the transmission lever 31 will also move and the drive link 26 will move by 8 degrees. The drive link 26 is inclined at an angle of 8', and the cutting torch retaining plate 22, which is a parallel link to the drive link 26 of the parallelogram linkage, is also inclined at an angle of 8'.
The centerline extension of the cutting torch 23 attached to the inclined cutting torch holding plate 22 coincides with the cutting line a. If the front surface height position detection sensor 11 traces the marking line g and the back surface position detection sensor 29 traces the marking line h, each sensor 11
, 29, each servo motor 8, 16, 34
is activated to accurately move the guide 12 or cutting torch 23, allowing three-dimensional profiling and cutting. scribe line g,
Tracking of h is performed by each sensor 11, 29 checking the paint applied on the marking lines g, h. In this cutting, there is a relationship of ad=de, ratio=ef, cf=戊, and aj=kalp=di between each node of the link mechanism and the cutting lines a, i and the marking lines g, h. Therefore, the material to be cut 18
must be installed at a predetermined height, and the height can be determined by measuring Δx using the height adjustment function of the surface height position detection sensor 1 and driving the servo motor 8 to move the guide 12 up and down. It is done. FIG. 4 shows an example in which the material to be cut 18 is cut in a direction perpendicular to the surface thereof.

Cutting lines a and j are marked on the front and back surfaces of the material to be cut 18, and the cutting line a is placed a distance m away from these cutting lines a and i.
, j are marked with marking lines g and h for position detection.

Paint is applied to these marking lines g and h in the same way as in the previous example. The material to be cut 18 is installed horizontally between the front surface height position detection sensor 1 and the back surface position detection sensor 29. At this time, the cutting lines a and i are on the extension of the center line of the cutting torch 23, and the scribing lines g and h' are on the extension of the front surface height position detection sensor 1 and the back surface position detection sensor 29. Therefore, between the marking lines g, h and the nodes d, i, there is gd=h
There is a relationship of i, and the drive link 26 is perpendicular to the surface of the material to be cut 18. Cutting torch holding plate 22, link 24,
Since 25 and 26 are parallelogram link mechanisms, the CD, that is, the cutting torch holding plate 22 is perpendicular to the surface of the material to be cut 18 on the guide 12. In the above state, the material to be cut 18 can be cut vertically. As described above in detail using the embodiments, the cutting device of the present invention has the following effects.

Gas cutting or plasma cutting allows smooth cutting of three-dimensional curves in thick plates. Work that conventionally required two workers can now be done by one worker, resulting in labor savings. Improved cutting accuracy can reduce the number of groove machining steps. Since fluctuations in joint width can be reduced, welding conditions can be easily set. Can be manufactured cheaply.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing three-dimensional curve processing, Fig. 2 is a plan view showing conventional three-dimensional curve cutting, Fig. 3 is a front view showing an embodiment of the present invention, and Fig. 4 is Fig. 3. FIG. 3 is a front view showing an example of work using the embodiment shown in FIG. In the drawing, 1 is a rail, 2 is a trolley, 3 is an arm, 6 is a slide, 11 is a surface height position detection sensor, 12 is an angle adjustment guide, 12a is an arm, 12b is a vertical arm, 13
18 is a support part, 18 is a material to be cut, 19, 20, 21' is a guide roller, 22 is a cutting torch holding plate, 23 is a cutting torch, 24, 25 is a connecting link, 26 is a driving link, 28
29 is a back position detection sensor, and 31 is a transmission rod. Band l figure, band 2 figure, rough figure 3, band 4 figure

Claims (1)

[Claims] 1. A guide member having an arc-shaped guide surface is fixed to a support member that can move relative to the cutting direction of the material to be cut and can move in a lateral direction perpendicular to the cutting direction, and a cutting torch for fusing the material to be cut. is attached to the guide member so that the cutting torch slides along the guide surface to change the inclination angle in the lateral direction, and a drive link parallel to the cutting torch is integrated with the support member. A surface position detection device that is rotatably pinned to an attached arm and connects the cutting torch and the drive link with a connecting link, and traces a scribed line following the cutting line on the surface of the material to be cut. A back side position detector is attached to the arm so as to be movable in the lateral direction, and a back side position detector is attached to the arm so as to be movable in the lateral direction. The present invention is characterized in that by engaging the detector and the drive link and moving the back surface position detector in the lateral direction, only the inclination angle of the cutting torch is changed while keeping the front surface cutting position by the cutting torch unchanged. 3D curve cutting device.