JPH04319030A - Multiaxial automatic tube expanding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a multi-axis automatic tube expansion device, which is used for expanding and joining the tube ends of a tube sheet in a structure having a large number of straight heat exchanger tubes or U-shaped tube expansion joints. This invention relates to an automatic axial tube expansion device.

0002

2. Description of the Related Art A conventional multi-axis automatic tube expansion device is known, for example, as described in Japanese Patent Application Laid-open No. 118922/1983. The technique disclosed in the publication will be explained with reference to FIG. 2. FIG. 2 is a perspective view of a conventional multi-axis automatic tube expansion device. In general, many conventional automatic tube expansion devices have a table 1, either a fixed table or a rotary table, and a bed 2, as shown in FIG. On bed 2,
There is a column 3 standing perpendicular to the bed 2.
The head base 5 is equipped with a tube expansion head 4 having multiple axes (represented by five axes in FIG. 2) that moves up and down perpendicularly to the bed 2 (in the Y direction). Further, the column 3 is structured to move on the bed 2 perpendicular to the vertical movement of the head base 5 and parallel to the tube expansion portion of the workpiece 6 (in the X direction).

During pipe expansion work, the workpiece 6 is placed on the table 1.
The tube expansion head 4 with multiple axes is positioned at the tube expansion point of the workpiece 6 by the movement of the column 3 on the bed 2 and the vertical movement of the head base 5 on the column 3. pipe expansion work. Note that 7A is a control device.

0004

SUMMARY OF THE INVENTION In the above-mentioned prior art, when the workpiece becomes large, it is difficult to position the tube expansion portion opposite to the tube expansion head. Further, when the object to be processed is a can manufacturing structure or the like, even if it is a small object, positioning is difficult due to poor assembly accuracy. Furthermore, since the conventional apparatus is a stationary type, there is a problem in that there are restrictions on the place where the apparatus can be installed.

The present invention has been made in order to solve the problems of the prior art described above, and is a multi-function device that enables accurate positioning of the tube expansion head with respect to the tube expansion portion of the workpiece and performs highly reliable and good tube expansion. The object of the present invention is to provide an automatic axial tube expansion device. Another object of the present invention is to provide a multi-axis automatic tube expansion device that can easily perform setup and positioning operations for large workpieces and save labor in tube expansion operations.

[0006]

[Means for Solving the Problems] In order to achieve the above object, a multi-axis automatic tube expansion device according to the present invention includes a multi-axis tube expansion head having a plurality of drive motors and a plurality of expanders, This multi-axis automatic tube expansion device comprises a table for moving this multi-axis tube expansion head vertically and horizontally to position it at a tube expansion point, and a frame equipped with a control device for controlling the table, The frame is provided with a holding means for removably fixing the workpiece so that the head faces the expanded tube portion of the workpiece. More specifically, the frame is provided with fixed legs for transporting and fixing the apparatus to the floor for each workpiece.

[0007] The means for achieving the above object are as follows:
More specifically, it is as follows. 2 extending horizontally and parallel to the expander of the multi-axis tube expansion head from the top of the frame on which is mounted the X-Y table equipped with the multi-axis tube expansion head having multiple drive motors and multiple expanders. These are directly attached to the tube expansion portion of the workpiece using the upper surface fixing hook of the book and two side surface fixing hooks extending horizontally and parallel to the expander of the multi-axis tube expansion head from both sides of the frame. Further, the four legs extending downward from the lower frame at right angles to the expander are grounded on the floor to fix the frame. This positions the workpiece at the tube expansion site. To achieve other purposes, NC equipment,
A control device equipped with a sensor and the like is mounted on a frame on which an XY table is mounted to enable transportation of the device.

[0008]

[Operation] The operation of the above technical means is as follows. Two rods extend horizontally from the top of the frame, which is equipped with an X-Y table equipped with a multi-axis tube expansion head with multiple drive motors and multiple expanders, parallel to the expanders of the multi-axis tube expansion head. By fixing the upper surface fixing hook to the workpiece, the X and Y coordinates of the tube expansion hole of the workpiece and the X-coordinates and Y coordinates of the apparatus X-Y table are corrected. Furthermore, by fixing the two upper surface fixing hooks and the two side surface fixing hooks extending horizontally from both side frames parallel to the expander of the multi-axis tube expansion head to the workpiece, the workpiece can be fixed to the workpiece. Correct the perpendicularity of the tube expansion site plane and the device X-Y table in the Z direction. With these four fixed hooks,
Three-dimensional positioning is performed.

Next, the four legs extending downward from the lower frame at right angles to the expander are brought into contact with the floor, thereby supporting the load of the device and fixing the frame. In this way, the center of the reference expander of the multi-axis tube expansion head mounted on the frame mounted opposite to the tube expansion portion of the workpiece is aligned with the axis of the reference hole of the tube expansion portion of the workpiece. As a result, all the expanders of the multiple axes of the multi-axis tube expansion head are positioned. In addition, the pipe expansion work is performed using an NC device and a seal.
Automatically controlled by controller.

0010

Embodiment An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view of a multi-axis automatic tube expansion device according to an embodiment of the present invention. As shown in FIG. 1, a multi-axis tube expansion head 10 is constituted by an induction motor 8 associated with a plurality of drive motors, a plurality of expanders 9, etc. Bull 11 is
It can be moved in the X-axis direction by the X-axis DC servo motor 12.
It can be moved in the Y-axis direction by a Y-axis DC servo motor 13. The frame 14 on which these components are mounted is equipped with an NC device 15 that automatically controls the pipe expansion work, and a control device 7 that includes a sequencer 16 and the like. The frame 14 also has an upper fixing hook 18, a side fixing hook 19, and a side fixing hook 19 for fixing the device to the heat exchanger tube plate 17 of the workpiece, as shown by two-dot chain lines. Fixed leg 20 to fix
is equipped.

Next, the operation of such a multi-axis automatic tube expansion device will be explained. The frame 14 is lifted and transported so that the multiaxial tube expansion head 10 can face the heat exchanger tube plate 17. The frame 14 is lowered and the upper fixing hook 18 is hooked onto the upper side of the heat exchanger tube plate 17 to fix it. Next, the side fixing hooks 19 are inserted and fixed from both sides of the heat exchanger tube plate 17. Furthermore, the four fixed legs 20 are extended to the floor surface to fix the device itself. This completes the work setup. Next, the reference expander 9 is advanced to the reference hole axis 21 of the heat exchanger tube plate 17 and positioned by aligning the centers.

When the positioning is completed, the induction motors 8 of each axis of the expander 9 are driven, and the pipe expansion operation is performed under the control of the sequencer 16. In addition, the X-axis servo motor 12 and the Y-axis servo motor 13 are controlled by the NC device 15, and the multi-axis expander 9 of the multi-axis tube expansion head 10 is controlled.
to each tube expansion point with high precision. When all pipe expansion work is completed, the side fixing hook 19 is removed, the device is lifted, and the device is moved to another workpiece.

[0013] According to this embodiment, since it is constructed as described above, the following effects can be achieved. (1) Attach the frame equipped with the X-Y table equipped with a multi-axis tube expansion head to two upper fixed hooks and two fixed hooks on both sides.
Three-dimensional positioning of the X-coordinate, Y-coordinate, and Z-direction dimension is completed in one go by attaching the book directly to the tube expansion site of the workpiece. (2) Control device equipped with NC device, sequencer, etc.
-Since it is mounted on the same frame as the Y table, the entire device is compact and can be transported. (3) Since the X-Y table is directly attached to the tube expansion portion of the workpiece, the positioning of the X and Y coordinates of the tube expansion hole is accurate regardless of the assembly accuracy of the workpiece. Furthermore, since the multiple axes of the expanders of the multi-axis tube expansion head are positioned at the tube expansion point with high precision through NC control, the tube expansion quality can be improved and reliability is high.

[0014]

Effects of the Invention As described in detail above, according to the present invention, a multi-axis automatic tube expansion is provided which can accurately position the tube expansion head with respect to the tube expansion portion of the workpiece and perform highly reliable and good tube expansion. equipment can be provided. Further, it is possible to provide a multi-axis automatic tube expansion device that can easily perform setup work and positioning work for large workpieces, and can save labor in tube expansion work.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a multi-axis automatic tube expansion device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional multi-axis automatic tube expansion device.

[Explanation of symbols]

7 Control device 8 Induction motor 9 Expander 10 Multi-axis tube expansion head 11 X-Y table 12 Servo motor for X-axis drive 13 Y-axis drive servo motor 14 Frame 17 Heat exchanger tube sheet 18 Upper fixed hook 19 Side fixing hook 20 Fixed leg

Claims (2)

[Claims] Claim 1: A table comprising a multi-axis tube expansion head having a plurality of drive motors and a plurality of expanders, and a table for moving the multi-axis tube expansion head vertically and horizontally to position it at a tube expansion point; A multi-axis automatic tube expansion device comprising a frame equipped with a control device to perform the process, and a holder for removably fixing the workpiece so that the multi-axis tube expansion head faces the tube expansion portion of the workpiece. A multi-axis automatic tube expansion device, characterized in that the frame is provided with means. 2. The multi-axis automatic tube expansion device according to claim 1, wherein the frame is provided with fixed legs for transporting the device for each workpiece and fixing it to the floor surface.