JPH01133691A - Friction welding machine - Google Patents

Abstract

PURPOSE:To easily and efficiently cut outside burrs on a pressure welded zone by advancing an work welded with pressure while being held by a rotation side chuck after friction welding and passing it through a shearing blade fitted to the claw front side inside periphery of a fixed side clamp. CONSTITUTION:A pipe flange 4 of a short pipe is held by a claw 9 of the chuck 8 of a main spindle 7 and rotated round the axial center via a main spindle box 5 by a motor 6. On the other hand, a long-sized pipe 1 is held and fixed by a claw 3 of the clamp 2 by an action of a clamp cylinder 10. In this state, the rotation side is brought close by an action of a cylinder 27 for moving the clamp. By this method, the pipe flange 4 is brought into contact frictionally with the pipe 1 and subjected to welding with pressure. With the title friction welding machine, a half-formed shearing blade 23 having difference in level to surround and slide on the periphery of the pipe 1 is fitted to the front side inside periphery of said claw 3. After pressure welding, the holding pressure of the clamp 2 is released and rotation of the rotation side main spindle 7 is stopped and the work welded with pressure is moved in the direction of the axial center while being held. By this method, the outside burrs 24 of the pressure welded zone are easily cut and removed by the shearing blade 23.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves rotating a pair of tubular or rod-shaped workpieces or a combination thereof, such as a pipe and a short pipe or a pipe flange, which are held oppositely to each other, while rotating them relative to each other. This invention relates to an improvement of a friction welding machine that performs pressure welding by frictional contact under pressure.

[Prior art] Generally speaking, friction welding is often used to reduce the cost of welding work, but in order to rationalize plant piping and welding work, pipe flanges are used to bend long pipes or bend them into two-dimensional or two-dimensional shapes. The pipe flange must be rotated to frictionally weld it to the pipe. When performing friction welding, burrs are created on the inside and outside of the welded part, so these burrs must be removed, or the conventional method of cutting the burrs by rotating the welded material requires rotating the welded pipe. This is difficult because it is not possible. Another disadvantage is that a burr cutting device must be provided outside the pressure welding machine.

[Problems to be solved by the invention] The present invention has been proposed in view of the above-mentioned conventional situation, and shortens the length of the friction welding machine by rotating the short workpiece and performing friction welding. At the same time, while holding the workpiece pressed by the chuck, stopping the rotation of the spindle and releasing the gripping pressure of the clamp on the stationary side, moving the workpiece back and forth relative to the axis of the spindle or the clamp. This makes it possible to cut off external burrs, making it easy to remove chips from the cut outside burrs, and simplifying the structure to make it more compact, allowing for efficient work and easy operation. The purpose of the present invention is to provide a friction welding machine that can obtain the desired results.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention employs friction welding, in which a pair of workpieces held oppositely are brought into friction contact under pressure while being rotated relative to each other. In the machine, a half-split shearing blade with a step for cutting external burrs is attached to the inner periphery of the front side of the clamp that grips the workpiece on the fixed side, and has a step for cutting external burrs that surrounds and slides on the outer periphery of the workpiece. , while holding the chuck that grips the short workpiece on the rotating side, stopping the rotation of the rotatably driven spindle, and releasing the gripping pressure of the clamp on the stationary side, move the spindle or the clamp relative to each other in the axial direction. A friction welding machine is constructed by providing a moving means for moving forward and backward.

[Function] Since the friction welding machine of the present invention is configured as described above, while the short workpiece is gripped and rotated by the chuck, it comes into frictional contact under pressure with the long tube gripped oppositely. They will be forced to press against each other. At this time, burrs are generated on the inside and outside of the pressure welding part, but the outer burrs caused by pressure welding are removed by releasing the gripping pressure of the clamp that grips the workpiece on the stationary side, and the chuck that grips the short workpiece on the rotating side. By moving the spindle or the clamp relatively in the axial direction using the moving means while holding the press-welded workpiece and stopping the rotation of the spindle, the half attached to the inner periphery of the front side of the clamp jaw is It will be sheared by a split shear blade. At this time, the outer edge to be sheared is divided by the step of the half-split shearing blade.

After the outer burr has been removed, the main shaft or clamp is relatively moved back to its original position by the moving means, the chuck is released, the clamp is released largely, and the welded workpiece is removed from the friction welding machine. Just pull it out.

[Example] Hereinafter, the present invention will be specifically described based on an example shown in the drawings.

Fig. 1 is a plan view of a friction welding machine showing one embodiment of the present invention, Fig. 2 is a sectional view taken along the arrow A-A line shown in Fig. 1, and Fig. 3 is a clamp portion thereof. FIG.

Further, FIG. 4 is a front view of the half-split shearing blade, FIG. 5 is a side view thereof, and FIG. 6 is a sectional view thereof.

In the figure, reference numeral 1 denotes a long tube that is one of the tubular workpieces to be pressed against each other, and is gripped by claws 3 of a clamp 2 and fixed horizontally. Reference numeral 4 denotes a pipe flange of the short work piece on the rotation side, which is gripped by the chuck claw 9 of the chuck 8 held at the tip of the main shaft 7 supported on the main shaft cylinder 5 and rotationally driven by the motor 6, The pipe flanges 4 are exactly opposite.

1O is a clamp cylinder that opposes the axis of the main shaft 7 at right angles and moves it close to or away from it; It is screwed through. 14
is a horizontal arm movably supported by a sleeve 15,
One end thereof is fixed to the lower end of the vertical arm 13 by a bolt 16. 17 is a tilting arm pivotably supported by a pin 18, and the lower end of the tilting arm 17 and the other end of the horizontal arm 14 are as follows.
They are connected by a connecting arm 19 via a pin 18. 2
0 is a swinging arm, one end of which is connected to a tilting arm 17 via a pin 18.
The other end is pivoted to the back surface of the other clamp 2 via a pin 18. 21 is a guide case that guides the clamp 2 in a direction perpendicular to the axis of the main shaft 7;
It is installed on 2. Therefore, when hydraulic pressure is supplied from the hydraulic boat a into the clamp cylinder 10, the piston 11 moves forward, and the rod 12, vertical arm 13, horizontal arm 14
, the clamp 2 is guided by the guide case 21 by the connecting arm 19, the tilting arm 17, the swinging arm 20, etc., and approaches the axis of the main shaft 7 in a direction perpendicular to it, and the claw 3 of the clamp 2 is used to hold a long pipe. 1 will be grasped. Also, on the contrary, hydraulic boat b
When more hydraulic pressure is supplied into the clamp cylinder 10, the piston 11 moves backward, and conversely, the clamps 2 move away from each other, and the grip of the long tube 1 by the claws 3 is released. 23 is the outer burr 2 generated at the pressure welding part.
It is a half-split shearing blade for cutting 4, and is removably attached to the inner periphery of the front side of the claw 3 of the clamp 2 with a screw 25, so that it surrounds and slides into the outer periphery of the pipe 1, which is the workpiece. installed on. Note that the half-split shearing blade 23 has a step 2.
6 is provided so that the outer burr 24 to be sheared is divided by this step 26.

Next, 27 is a main shaft moving cylinder that moves the main shaft 7, which is a short workpiece on the rotating side, in the axial direction with the rotation stopped after pressure welding, and is arranged parallel to the axial center of the main @ 7, one on the top of the guide case 21, and the other on the guide case 21.
The tip of each rod 28 is installed at the bottom of the
It is connected to both front sides of the main shaft liquid 5.

In the friction welding machine of the present invention having the above configuration, the pipe flange 4, which is a short workpiece, is gripped by the chuck claws 9,
When the motor 6 is driven, the pipe flange 4 is moved by the chuck claw 9.
While being gripped and rotated by the clamp 2
They are frictionally welded under pressure to the long tube 1 gripped by the claws 3 of the tubes 3, and are brought into pressure contact with each other.

In addition, when press-welding, will there be firmness on the inner and outer peripheries of the press-welded part?
To remove the outer burr 24 caused by pressure welding, after the pressure welding is completed, with the rotation of the main shaft 7 stopped, chuck jaws 9 are removed.
Hydraulic pressure is supplied from the hydraulic boat b to the clamp cylinder 10 while the pipe flange 4 of the workpiece press-welded is being gripped, and the gripping pressure on the pipe 1 by the claws 3 of the clamp 2 is released.

Next, the rod 28 is retracted by the main shaft moving cylinder 27, and the main shaft 7 together with the main shaft liquid 5 is moved forward relative to the clamp 2 while the rotation is stopped. Then, since the pressure-welded workpiece is gripped by the chuck jaws 9, it moves forward in the axial direction together with the main shaft 7, and the outer burr 24 produced by the pressure-welding is attached to the inner periphery of the front surface of the jaws 3 of the clamp 2. The sheared outer burr 24 is sheared by the half-split forming shear blade 23, and the sheared outer burr 24 is divided by the step 26 of the half-split forming shear blade 23, falls down, and is removed.

As the main shaft 7 moves forward, the pressure contact part passes through the half-forming shearing blade 23 and the outer burr 24 is cut and removed, and the main shaft liquid 5 comes into contact with a limit switch (not shown), increasing the oil pressure to the main shaft moving cylinder 27. supply is switched, the rod 28 extends, and the main shaft 7 along with the main shaft liquid 5 retreats in the axial direction to its original position, and the main shaft liquid 5 contacts a limit switch (not shown) and moves to the main shaft moving cylinder 27. The supply of hydraulic pressure is stopped, and the retraction of the main shaft 7 is stopped. Next, while releasing the chuck claw 9, the clamp cylinder 10 is removed from the hydraulic boat b.
Further hydraulic pressure is supplied to the clamp 2 to greatly release the claw 3, and the press-welded workpiece is pulled out from the friction welding machine, completing the entire work process. Next, to start the pressure welding process again, pressurized oil is supplied from the hydraulic boat a to the clamp cylinder 10, the long pipe l is gripped by the claws 3 of the clamp 2, and the pipe flange 4 is held by the chuck 9. Just hold it tight and repeat the same operation. At this time, if the pipe size changes, the chuck claws 9, the claws 3 of the clamp 2, the half-forming shearing blades 23, etc. can be replaced as appropriate depending on the pipe size.

Note that the outer burr caused by pressure welding can be removed by rotating the main shaft 7 or by using a burr cutting drill or burr cutting blade (not shown) for cutting the inner burr held at the center of the main shaft 7. By moving the spindle 7 forward in a stopped state, it is possible to cut and remove it by punching, but at the same time as the outer burr 24, the inner burr can also be cut and removed by pushing the spindle 7 forward. By doing so, the work process can be shortened, which is extremely convenient.

Next, FIG. 7 is a plan view of a friction welding machine showing another embodiment of the present invention. In the figure, members corresponding to those shown in FIG. Omitted.

In the embodiment shown in FIG. 1, after the pressure welding is completed, with the main shaft 7 stopped rotating, the clamp 2 is held while the chuck jaws 9 are gripping the pipe flange 4 of the workpiece pressure welded.
Release the gripping pressure of the tube 1 by the claw 3, retract the lot 28 by the cylinder 27 for moving the main shaft, and move the main shaft acid 5 together.
The main shaft 7 is moved forward relative to the clamp 2 while the rotation is stopped, and the outer burr 24 is cut and removed by the half-formed shear blade 23.
Instead of moving the clamp 2 forward relative to the clamp 2 while the rotation is stopped, the clamp 2 with the gripping pressure on the tube 1 released is moved forward relative to the main shaft 7 that has stopped rotating. Then, the outer burr 24 may be cut and removed by the half-forming shearing blade 23.

Therefore, in the embodiment shown in FIG. 7, the main shaft acid 5 is fixed on the machine base 22 by the main shaft acid fixing bolt 29, the clamp 2 is installed on the clamp base 30, and the clamp base 30 is fixed on the machine base 22. It can move forward and backward on the sliding surface 31 of 22 in the axial direction.

In the figure, reference numeral 27' denotes a cylinder for moving the clamp, which is arranged parallel to the axis of the main shaft 7, like the cylinder for moving the ball shaft 27 shown in FIG. The rods 28 are installed at the lower part of the case 21, and the tips of the rods 28 are connected to both front surfaces of the main shaft acid 5.

In this embodiment, when the clamp 2 moves forward and the half-forming shear blade 23 passes through the pressure welding part and the outer burr 24 is cut and removed, the clamp base 30 comes into contact with a limit switch (not shown). , clamp moving cylinder 27
'The supply of hydraulic pressure to ' is switched, the rod 28 is extended,
The clamp 2 along with the clamp base 30 retreats in the axial direction to its original position, and the clamp base 30 contacts a limit switch (not shown), stopping the supply of hydraulic pressure to the clamp moving cylinder 2-7', and the clamp Although the retreat of the table 30 is stopped, other operations are similar to the friction welding machine of the embodiment shown in FIG.

However, the moving means for relatively moving the main shaft 7 and the clamp 2 forward and backward in the axial direction, and the means for opening and closing the clamp 2 are not limited to the illustrated embodiments, and the design may be changed as necessary. It goes without saying that it can be done. Further, in this embodiment, the step 26 is provided on the half surface of the half-split shearing blade 23, but the half-split blade is made into a chevron shape, and the sheared outer burr 2
4 or may be divided according to the number of peaks.

[Effects of the Invention] As specifically explained above, according to the present invention, friction welding can be performed by holding a long pipe on the stationary side and a short workpiece on the rotating side, so that friction welding is possible. The length of the pressure welding machine is shortened, making it not only cheaper but also easier to transport to construction sites.

Further, since the half-split shearing blade that cuts the outer edge has a step, the sheared chips are divided and easily fall and can be removed.

In addition, the outer burr can be removed by stopping the rotation of the main shaft and releasing the gripping pressure of the clamp on the fixed side while moving the main shaft or the clamp relatively back and forth in the axial direction. There is no need to rotate the main shaft when removing burrs, and the rotational drive mechanism for the main shaft can be simplified. Further, since the half-split shearing blade only needs to be attached to the inner periphery of the front side of the claw of the clamp, the entire device can be made compact, easy to handle, and manufactured at low cost. It has many advantages such as high work efficiency, and is extremely effective in practice when applied to on-site piping work in plant construction, for example, where it is necessary to join short pipes or pipe flanges to both ends of a large number of pipes. A friction welding machine can be provided.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a friction welding machine showing one embodiment of the present invention, Fig. 2 is a sectional view taken along the arrow A-A line shown in Fig. 1, and Fig. 3 is a clamp portion thereof. 4 is a front view of the half-formed shear blade, FIG. 5 is a side view thereof, FIG. 6 is a sectional view thereof, and FIG. 7 is a friction welding method showing another embodiment of the present invention. FIG. 1...Pipe, 2...Clamp, 3...Claw, 4...
Pipe flange, 5... Main shaft, 6... Motor, 7...
・Main shaft, 8... Chuck, 9... Chuck jaw, 10
... Clamp cylinder, 11 ... Piston, 12
...lot, 13...vertical arm, 14...horizontal arm,
DESCRIPTION OF SYMBOLS 15... Sleeve, 16... Bolt, 17... Tilting arm, 18... Pin 19... Connecting arm, 20... Rocking arm, 21... Guide case, 22... Machine stand, 23・
...Half-split shearing blade, 24...Outer burr, 25...
Screw, 26...Step, 27...Cylinder for main shaft movement, 27'...Cylinder for clamp movement, 28...
- Rod, 29...Main shaft housing fixing bolt, 30...Clamp stand, 31...Sliding surface, a, b...Hydraulic boat.

Claims (1)

[Claims] In a friction welding machine that welds a pair of workpieces that are gripped opposite each other by bringing them into frictional contact under pressure while rotating relative to each other, the workpiece is A half-formed shearing blade with a step for cutting external burrs is installed, which surrounds and slides into contact with the outer periphery of the main shaft. 1. A friction welding machine comprising a moving means for relatively moving the main shaft or the clamp forward and backward in the axial direction while the clamp is stopped and the gripping pressure of the clamp on the fixed side is released.