JPH0335451Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for easily removing and correcting deformations and burrs caused by press cutting of both ends of a tubular material, particularly a square tubular material, continuously formed by a cold forming machine. The purpose of this is to almost completely eliminate and correct the deformation and burrs at both ends of the square tube material that occur when cutting the square tube material to a fixed length using the press cut of the die set, in synchronization with the production speed of the production line of the cold forming machine. . In other words, the deformed parts at both ends of the square tube material that occur during press cutting are conventionally recut outside the production line (using a cutting tool, cutting saw, or cutting wheel).
I had to trim it and trim it. For this reason, the production of rectangular tube materials has had the problem of low efficiency and low yield.

According to the apparatus of the present invention, the deformed end face of the rectangular tube material caused by press cutting is corrected, and there is no need to re-cut the deformed part, so that the yield can be increased. Moreover, the apparatus of the present invention can be easily incorporated into a cold forming machine line for rectangular tube materials, and can improve the productivity of rectangular tube materials.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the press-cut end face correction device for rectangular tubes (hereinafter simply referred to as tubes) according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing one embodiment of the device of the present invention, and FIG.
It is a raw surface view taken along the line A-A in the figure. In the drawing, 1 is an automatic pipe material chuck device, and 2 is a hydraulic piston mechanism 16.
A pipe end face straightening head device is shown in which an end face straightening head 13 is attached to the tip of a rod.
Reference numeral 3 indicates a part of a parallel tube transfer table device, and the tube material 4 is transferred on the parallel transfer table device in the direction of the arrow in FIG. FIG. 4 is an explanatory diagram showing the structure and operation of an automatic pipe chuck device 1 equipped with an automatic loading and unloading device that operates in conjunction with a parallel transfer table device 3 (dashed line), in which there are two chucks. It is composed of a pair of rotatable opening/closing half chuck pieces 5, 5', and each chuck piece 5, 5' is connected to a rotary drive device 7, such as a rotary actuator (hydraulic drive), respectively. 7' for rotation by shafts 6, 6'. A lever 8 is pivotally supported by a shaft 9 fixed below the transfer surface of the transfer table device 3, and a tube material extrusion projection 1 is provided at the tip of the lever 8.
0 is provided protrudingly, and its base end is connected to approximately the center of the half-chuck piece 5 via a connecting rod 11, and is driven by a rotary actuator 7 to move the half-chuck piece 5. falls down in the direction of the arrow and the chuck is released, and at the same time the lever 8 swings in the direction of the arrow via the connecting rod 11, and the extrusion protrusion 10 provided at its tip is stopped in parallel by the stopper 12. The first one of the pipes 4 is moved downward past the stopper 12 so that the pipe 4 slides down on the transfer table 3 and is stored in the open half-chuck 5'. It is provided. Note that the chuck device 1 described above originally has a plurality of similar chuck devices 1 as the first and second chuck devices in order to handle long pipe materials.
As shown in the figure, they are arranged in parallel in the length direction of the tube and are provided to work together and synchronously. FIG. 3 is a partial view showing the end face correction head 13 of the pipe material end face correction head device 2, in which A is a partially sectional front view and B is a side view taken along the line B--B of A. 14
1 is a pyramid fixed in front of the head 13 for end face correction, and in the case of this embodiment shown in the figure, the square pyramid is shown to correspond to the square tube material 4 being produced. Reference numeral 15 denotes a retaining ring that holds the outer periphery of the tube end when the pyramid 14 is pressed into a wedge shape by the hydraulic piston mechanism 16 toward the tube end that has been deformed by press cutting, and has a shape that fits loosely around the outer periphery of the tube material 4. It is formed into an inner diameter shape with dimensions of and.

In order to correct the press-cut and deformed end face of the pipe material 4 using the pipe material end face straightening device of the present invention having the structure described above, first, the half chuck pieces of the pipe material chuck device 1 arranged in parallel are used. 5
By simultaneously operating the rotary drive device 7 to rotate the chuck synchronously in the direction of opening the chuck (in the direction of the arrow in FIG. The first one of the pipes 4 is moved in a circular arc in the direction shown by the arrow in FIG. The book is pushed out and rolled downward past the stopper 12. The single tube member 4 transferred in this way slides down on the transfer table device 3 and is fitted into the chuck portion of the half chuck piece 5'. Next, the rotary drive device 7 is actuated to rotate the half-chuck piece 5 in the direction of closing the chuck, and the tube member 4 is chucked into a predetermined position by the half-chuck pieces 5, 5'. At this time, the tube extrusion protrusion 10 returns to its original position via the above-mentioned connecting rod mechanism, and the remaining tubes 4 on the transfer table device 3 slide forward by a distance of one tube, respectively, to the stopper 12. Due to this action, the pipes are stopped in parallel and preparations for the next tube material supply and charging are completed.

Pipe material 4 made of the above half chuck pieces 5, 5'
Simultaneously with the completion of the chucking operation, the end face straightening heads 13, 13 of the pipe material end face straightening head devices 2, 2 disposed at predetermined positions near both ends of the pipe material 4 are simultaneously driven by respective hydraulic piston mechanisms 16, 16. By activating it and pushing the pyramid 14 fixed on the front surface of the heads 13, 13 in a wedge shape from the end face of the tube 4, the deformation of the both end faces of the tube 4 due to press cutting is simultaneously completely removed. Correct and return to the original shape before deformation. The rear end face straightening heads 13, 13, which have been corrected for deformation of the end face, are returned to their original positions, and at the same time, the rotary drive device 7' is activated to straighten the half chuck piece 5' in the direction of the arrow shown in FIG. The processed tube material 4 is rotated while being held, and the tube material 4 is transferred onto the transfer table device 3. The tube material 4 placed on the transfer table slides down on the transfer table device 3 due to its own weight and is discharged. At the same time as the discharge of the pipe material 4 is completed, the half chuck piece 5'
is returned to its original position to complete one cycle of the pipe end face straightening work by the pipe end face straightening device of the present invention. As explained above, since the device of the present invention completely restores the deformed portion of the end face due to press cutting of the rectangular tube material, there is no need to re-cut the deformed portion as in the conventional method, and the yield can be increased.
In addition, it can be easily incorporated into a cold forming machine line for rectangular tubes, increasing productivity.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the rectangular tube press-cut end face correction device of the present invention, Fig. 2 is a front view taken along the line A-A in Fig. 1, and Fig. 3 is a head for end face correction of a rectangular pipe material. 13, in which A is a partially sectional front view and B is a side view taken along the line B-B in FIG.
FIG. 4 is a schematic diagram for explaining the structure and operation of the automatic tube chuck device 1. As shown in FIG. The following is an explanation of the symbols in the drawings: 1: Automatic pipe chuck device, 2: Pipe end face straightening head device, 3: Pipe parallel transfer table device, 4: Square pipe, 5, 5': Rotating open/close type half chuck piece. , 6, 6': shafts for rotating the half-chuck pieces 5, 5', respectively;
7, 7': rotation drive device (hydraulic rotary actuator) for rotating the shafts 6, 6', respectively;
8: Lever, 9: Swing shaft of lever 8, 10: Tube material extrusion projection provided at the tip of lever 8, 11: Connecting rod, 12: Stopper, 13: End face correction head, 14: End face correction head 13 Pyramid fixed in front, 15: Holding ring fixed in front of end face correction head 13, 16: End face correction head 1
Hydraulic piston mechanism for 3 drives.

Claims (1)

[Scope of utility model registration request] This is a cut surface straightening device for a square tube, which uses a chuck of the square tube consisting of a set of two rotary opening/closing half chuck pieces, and a piston mechanism to straighten the left and right cut end surfaces of the square tube gripped by the chuck. The end face straightening head is composed of a pyramid that is pushed into the end face of a square tube to correct its inner deformation, and a pyramid that is fitted loosely around the outer periphery of the end face of the square tube to correct its outer periphery. 1. A press-cut end face straightening device for a square tube material, comprising a retaining ring for holding the material.