JPH07115243B2 - Friction welding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pipe and a pair of tubular or rod-shaped workpieces, such as a pipe and a short pipe or pipe flanges, which are held opposite to each other, while rotating them relative to each other. The present invention relates to an improvement of a friction welding machine in which frictional contact is made under pressure and pressure welding is performed.

[Prior Art] Generally, friction welding is widely used to reduce the cost of welding work.

However, in order to frictionally weld the pipe flange to a long pipe or a pipe that has already been bent one-dimensionally or two-dimensionally, the pipe flange must be rotated, but when friction welding is performed, burrs are formed on the inside and outside of the welding portion. Because of this, this burr must be removed depending on the application. However, it is difficult because the long or two-dimensional pressure welding tube cannot be rotated.

[Problems to be Solved by the Invention] The present invention has been proposed in view of the above-mentioned conventional circumstances, and is a cutting device for cutting an outer burr of a workpiece in which a pipe flange or the like is pressed against a long pipe or a bent pipe. In, after cutting the outer burr, the burr cutting blade that cut the outer burr does not get in the way when pulling out the pressed work piece, the work can be done efficiently, and the operation is easy to manufacture. It is intended to provide a friction welding machine to obtain.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention rubs a pair of tubular or rod-shaped workpieces or a combination thereof that are gripped in opposition to each other under pressure while mutually rotating each other. In a friction welding machine that makes contact and pressure contact, machining that has a burr cutting blade that cuts the outer burr generated at the pressure contact part on the front part of the spindle that holds and rotates the chuck that holds the short workpiece on the rotation side A friction welding machine is provided which is provided with burr cutting blade position adjusting means for adjusting the swing angle of the cutting arm directed in the outer peripheral direction of the object by a plunger to arbitrarily adjust the distance between the burr cutting blade and the shaft core, Further, the friction welding machine is configured to deburr the cutting arm overhanging the outer protrusion of the short workpiece on the rotating side.

[Operation] Since the friction welding machine of the present invention is configured as described above, the short work piece is gripped by the chuck and rotated, and friction is exerted on the long pipe or the like held facing each other under pressure. They are brought into contact with each other and pressed against each other. At this time, burrs are formed on the inner and outer sides of the pressure contact portion.The outer burrs generated by pressure contact, after releasing the chuck, adjust the distance between the burr cutting blade and the shaft core by the burr cutting blade position adjusting means, The cutting blade is brought close to the outer circumference of the press contact portion and the main shaft is rotated to be removed by cutting.

After the outer burr is removed, the burr cutting blade is retracted in a direction away from the outer periphery of the press contact portion, the spindle drive is stopped, and the pressed work is pulled out from the friction welding machine. Moreover, the burr cutting blade does not interfere with the pulling out of the flange portion.

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

FIG. 1 is a transverse sectional view of a friction welding machine showing an embodiment of the present invention, and FIG. 2 is a partially cutaway front view thereof. Further, FIG. 3 is a sectional view of a main part of the burr cutting blade position adjusting means, FIG. 4 is a side view of a free end of a cutting arm, and FIG. Is.

In the figure, reference numeral 1 is a long tube which is one tubular work piece pressed against each other, and is held by a clamp 2 and fixed horizontally. Reference numeral 3 denotes a pipe flange of the short workpiece on the rotating side, which is gripped by a chuck claw 4 and the pipe 1 and the pipe flange 3 are made to face each other. However, the clamp 2 and the clamp claw 4
May be convertible depending on the size of the work piece that is tubular or rod-shaped or a combination thereof to be gripped. 5 is a motor,
The rotational force of the motor 5 is switched by the clutch 6 and transmitted to the gear 8 via the coupling 7. 9 is a bearing
A main shaft is horizontally supported in a main shaft housing 11 via a gear 12, and a gear 12 engaging with a gear 8 is keyed to the outer periphery of the main shaft, and a main shaft 9 is rotationally driven by a motor 5. Incidentally, 13 is a brake, which can brake the rotation of the main shaft 9.

Reference numeral 14 is a cylinder shaft, which is concentrically mounted in the main shaft 9 and fixed by a nut 15, and can be integrally rotated with the main shaft 9 by a key 16. 17 is the cylinder shaft 14
It is a cylindrical piston that is attached to the outer circumference of the tip of the piston and can move back and forth in the axial direction.
At one place, one end of an L-shaped link 19 supported by a pin 18 is locked.

Reference numeral 20 denotes a chuck fixed to the tip end surface of the main shaft 9 by a bolt 21, and the chuck claws 4 are provided at three slider grooves 22 (see FIG. 2) radially provided at equal intervals in the radial direction of the chuck 20. Bolt to claw slider 23 that can slide along
It is fixed at 24, and the claw slider 23 is locked to the other end of the L-shaped link 19. Therefore, when the cylindrical piston 17 moves back and forth in the axial direction, the L-shaped link 19 tilts, the pawl slider 23 slides along the slider groove 22, and the chuck pawl 4 moves at three positions on the outer periphery of the pipe flange 3. It will be gripped or released.

Next, 25 is a plunger mounted inside the tip of the cylinder shaft 14, and the rotation of the rod 26 thereof is restricted via the key 28 of the cylinder cover 27 fixed inside the cylinder shaft 14, and the plunger 25 is It is possible to move back and forth only in the axial direction. 29 is a burr cutting drill that cuts the inner burr 30 generated in the pressure-welded portion of the pipe 1 and the pipe flange 3, and the plunger 25
The rod 26 is mounted in a taper hole 31 provided at the tip of the rod 26, and is detachably fixed by a nut 32.

Next, 33 is a cutting arm that is swingably supported by a support shaft 34, and is attached so that deburring can be performed by overhanging the outer projection of the pipe flange 3 that is a short workpiece.
A burr cutting blade 36 for cutting the outer burr 35 generated in the press contact portion is detachably attached to the free end with a bolt 37. Reference numeral 38 denotes a nut that prevents the cutting arm 33 from being separated from the tip end portion of the support shaft 34. The support shaft 34 mounted on the base end portion of the swing arm 33 by the nut 38 is parallel to the axis of the main shaft 9. A support case 39 arranged and fixed so as to face the front head of the spindle 9.
Is rotatably supported by a sleeve 40 inside the support shaft.
When the 34 is rotated, the cutting arm 33 swings in a direction perpendicular to the axis of the spindle 9, and the burr cutting blade attached to the free end of the cutting arm 33.
The 36 is adapted to approach and retreat to the outer circumference of the press contact portion. Incidentally, 48 is a cutting arm 33 supported by a support shaft 34.
Is a shaft center direction position adjusting bolt for adjusting the shaft center direction position.

Next, 41 is a plunger arranged in the support case 39 so as to be orthogonal to the support shaft 34, and a rack 43 is provided on the rod 42 thereof, and the rack 43 is a pinion 44 provided on the support shaft 34. When the plunger 41 moves, the support shaft 34 is rotated by the flange 43 engaged with the pinion 44, and the cutting arm 33 is swung.

Next, 45 is a swing angle regulating stopper that regulates the swing angle of the cutting arm 33, which is attached to the tip portion of the rod 42 of the plunger 41 and is prevented from rotating by the stopper detent 46.
The swing angle regulated by the adjusting handle 47 can be adjusted.

In the figure, A, B, C, D are hydraulic ports for supplying and discharging hydraulic oil,
When the hydraulic pressure is supplied from the hydraulic port A, the cylindrical piston 17 moves forward to open the chuck claw 4, and the back pressure is the hydraulic port B.
Will be drained through. On the contrary, when the hydraulic pressure is supplied from the hydraulic port B, the cylindrical piston 17 retracts to close the chuck claw 4, and the back pressure is drained via the hydraulic port A.

Further, when the hydraulic pressure is supplied from the hydraulic port C, the plunger 25 is moved forward by a part of the supplied hydraulic pressure, the inner burr 30 is cut by the burr cutting drill 29, and the remaining diverged hydraulic pressure causes the plunger 25 to move. 41 moves forward, cutting arm 33
Swings in a direction approaching the press contact portion, and the outer burr 35 is cut by the burr cutting blade 36. At this time, the back pressures of the plunger 25 and the plunger 41 are collected and drained through the hydraulic port D. On the contrary, when the hydraulic pressure is supplied from the hydraulic port D, the plunger 25 retracts due to a part of the supplied hydraulic pressure, the cutting of the inner burr 30 by the burr cutting drill 29 is completed, and the cutting of these inner burrs is parallel. Then, the plunger 41 retreats by the branched hydraulic pressure, the cutting arm 33 swings in the direction away from the press contact portion, and the cutting of the outer burr 35 by the burr cutting blade 36 is completed. At this time, the back pressures of the plunger 25 and the plunger 41 are collected and drained through the hydraulic port C.

However, in the present embodiment, the pressure oil supplied and discharged through the hydraulic ports C and D is branched or collected to cause the plunger 25 and the plunger 41 to move forward and backward at the same time, resulting in the pressure contact portion. The inner burr 30 and the outer burr 35 are cut at the same time, and the cutting is finished at the same time.
Plural hydraulic ports may be provided so that the plunger 25 and the plunger 41 can be independently moved forward and backward, and the inner burr 30 and the outer burr 35 can be independently cut.

Next, FIG. 6 is a partial cross-sectional view showing another embodiment. In place of the burr cutting drill 29 for cutting the inner burr 30, a tool holder 50 having a burr cutting blade 49 attached to the tip is attached to the tip of the rod 26. The inner burr 30 is mounted in a tapered hole 31 provided in the section and is detachably tightened by a nut 32. The cutting procedure of the inner burr 30 is the same as the case of cutting with a burr cutting drill 29.

Since the friction welding machine of the present invention is configured as described above, when hydraulic pressure is supplied to the hydraulic port B to grip the pipe flange 3 which is a short workpiece with the chuck claws 4 and drive the motor 5, While the pipe flange 3 is gripped by the chuck claws 4 and rotated, the pipe flange 3 is brought into frictional contact with the long pipe 1 opposed to and gripped by the clamp 2 under pressure, and pressed against each other. However, in order to press the pipe flange 3 against the pipe 1, it is sufficient that the main spindle housing 11 is moved with respect to the base.

When pressure is applied, burrs are generated on the inner and outer circumferences of the pressure contact,
The outer burr 35 generated by the pressure contact is cut by the burr cutting position adjusting means by supplying hydraulic pressure to the hydraulic port A to release the chuck claw 4 and then supplying hydraulic pressure to the hydraulic port C to adjust the swing angle. By adjusting the swing angle of the arm 33, bringing the burr cutting blade 36 closer to the outer circumference of the press contact portion, adjusting the distance between the burr cutting blade 36 and the shaft center, and rotating the main shaft 9, the cutting is removed. Become. Further, after the burr cutting blade is brought close to the outer peripheral surface of the workpiece, the cutting arm 33 is rotated together with the rotation of the spindle 9,
It is also possible to move the spindle housing 11 backwards for cutting. At this time, if the inner burr 30 is also cut and removed at the same time by the burr cutting drill 29 or the burr cutting blade 49,
It is very convenient.

Next, after the outer burr 35 is removed, hydraulic pressure may be supplied to the hydraulic port D to retract the burr cutting blade 36 from the outer circumference of the press contact portion and stop the rotational drive of the main shaft 9. At this time, the burr cutting drill 29 or the burr cutting blade for cutting and removing the inner burr 30 is removed.
If 49 is also made to retreat in the axial direction at the same time,
It is very convenient. After the burr is thus removed by cutting, the cutting arm 33 is sufficiently retracted, so that the burr cutting blade 36 interferes with the pulling out of the flange portion when pulling out the pressed workpiece from the friction welding machine. Never,
You can smoothly repeat the work.

FIG. 7 is a fragmentary cutaway view showing another embodiment of the burr cutting blade position adjusting means, and FIGS. 8 and 9 are views taken along line AA and line BB in FIG. 7, respectively. It is sectional drawing cut | disconnected along.

In the present embodiment, the support shaft 34 that supports the cutting arm 33 is
It is supported in a hole 51 provided in the support case 39.
52 is attached to the support portion of the support shaft 34 via the key 53,
A swinging blade that is cylindrical and has a convex protrusion on its side. An outer side 55 having hydraulic chambers 54a and 54b is slidably contacted with the protrusion of the swinging blade 52 on the outer periphery of the swinging blade. When the hydraulic pressure is supplied to the hydraulic chamber 54a through the oil passage 56 communicating with C, the support shaft 3
4 swings and the cutting arm 33 swings toward the press contact portion,
The outer burr 35 will be cut.

At this time, the oil pressure in the oil pressure chamber 54b is drained from the oil pressure port D via the oil passage 57.

On the other hand, the hydraulic chamber is connected via an oil passage 57 communicating with the hydraulic port D.
When hydraulic pressure is supplied to 54b, the support shaft 34 swings and the cutting arm 3
3 oscillates in the direction away from the press contact portion, and the cutting of the outer burr 35 is completed.

At this time, the oil pressure in the oil pressure chamber 54a is drained from the oil pressure port C via the oil passage 56.

Reference numeral 58 is a retaining ring that fixes the position of the swinging blade 52.
Further, 59 is in contact with the end faces of the swinging blade 52 and the outer cylinder 55, and the hydraulic chamber 54a,
With the cover that closes b, it is inserted into the support shaft 34, and the support case 3
It is fixed to the end face of 9.

Next, 60 is fixed to the support shaft 34 via the key 61,
The abutment plate swings together with the contact plate, and the tip of the axial center position adjusting bolt 48 is fixed to the one end of the abutment plate by a nut 62. Further, the other end of the contact plate 60 is provided with a contact surface 63 extending in the axial direction of the support shaft 34 and located on the outer periphery of the cover 59. Reference numeral 64 denotes a bolt seat facing a contact surface 63 formed integrally with the cover 59, and a swing angle adjusting bolt 65 is screwed to the bolt seat 64 in a direction perpendicular to the axis of the support shaft 34. The tip end thereof is brought into contact with the contact surface 62 of the contact plate 60, and the contact position is locked by the lock nut 66.

Therefore, when the swing angle adjusting bolt 65 is operated, the position where the contact surface 63 of the contact plate 60 that swings and rotates with the support shaft 34 contacts the swing angle adjusting bolt 65 changes, and the swing of the cutting arm 33 is changed. The dynamic angle changes, and the burr cutting blade position, that is, the distance between the burr cutting blade 36 and the shaft center can be arbitrarily adjusted.

In the figure, 67 is a bolt for attaching the cover 59.

However, the cutting arm 33 may be supported in the direction perpendicular to the axis of the main shaft 9 or in the tangential direction of the outer circumference of the workpiece. Further, the burr cutting blade position adjusting means is not limited to the above-mentioned embodiments for adjusting the swing angle, and the design can be arbitrarily changed as required.

[Effects of the Invention] As specifically described above, according to the present invention, it is possible to perform friction welding by gripping a long pipe or the like on the fixed side and a short work piece on the rotating side. Not only is the pressure welding machine short and inexpensive, it is easy to transport to the construction site. In addition, the burr cutting blade that cuts the outer burr can adjust the distance between the burr cutting blade and the shaft center with respect to the shaft axis of the main shaft by swinging the cutting arm. In addition to being able to handle burr cutting, even if the short work piece is a pipe flange or the like, the burr cutting blade does not interfere with the pulling out of the flange part when pulling out the pressed work piece from the friction welding machine. Absent. In addition, the structure is simple, the cost is low, and the device is compact, and the handling is easy. It has many advantages, and has good work efficiency. For example, it is necessary to join short pipes and pipe flanges to both ends of many pipes. It is possible to provide a friction welding machine that is extremely effective in practice when applied to on-site piping work in plant construction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a friction welding machine showing an embodiment of the present invention, FIG. 2 is a partially cutaway front view thereof, and FIG. 3 is a cross-sectional view of an essential part of burr cutting blade position adjusting means. Figure is a side view of the free end of the cutting arm. Figure 5 is a plan view showing the outer burr and the burr cutting blade in close proximity. Figure 6 is a partial sectional view showing another embodiment. Figure 7 is a burr cutting. FIG. 8 is a fragmentary sectional view showing another embodiment of the blade position adjusting means, and FIGS. 8 and 9 are sectional views taken along the line AA and the line BB in FIG. 7, respectively. Is. 1 ... Pipe, 2 ... Clamp, 3 ... Pipe flange, 4 ...
Chuck claw, 5 ... motor, 6 ... clutch, 7 ... coupling, 8 ... gear, 9 ... spindle, 10 ... bearing, 11
…… Spindle housing, 12 …… Gear, 13 …… Brake, 14 …… Cylinder shaft, 15 …… Nut, 16 …… Key, 17 …… Cylindrical piston, 18 …… Pin, 19 …… L-shaped link, 20 …… Chuck, 21 …… Bolt, 22 …… Slider groove, 23 …… Claw slider, 24 …… Bolt, 25 …… Plunger, 26 …… Rod, 27 …… Cylinder cover, 28 …… Key, 29 … Burr cutting drill, 30 …… Inner burr, 31 …… Tapered hole, 32…
… Nuts, 33 …… Cutting arms, 34 …… Support shafts, 35 …… Outside burr, 36 …… Burr cutting blades, 37 …… Bolts, 38 …… Nuts,
39 …… Support case, 40 …… Sleeve, 41 …… Plunger, 42 …… Rod, 43 …… Rack, 44 …… Pinion, 45
...... Rotation angle restriction stopper, 46 …… Stopper rotation stopper, 47 …… Adjustment handle, 48 …… Shaft center position adjustment bolt, 49 …… Burr cutting blade, 50 …… Cutter holder, 51 ……
Hole, 52 ... rocking blade, 53 ... key, 54a, b ... hydraulic chamber, 5
5 …… Outer cylinder, 56 …… Oil passage, 57 …… Oil passage, 58 …… Snap ring, 59
...... Cover, 60 …… Abutment plate, 61 …… Key, 62 …… Nut, 63 …… Abutment surface, 64 …… Bolt seat, 65 …… Swing angle adjustment bolt, 66 …… Lock nut, 67 ……bolt.

Claims (2)

[Claims] 1. A friction welding machine for frictionally contacting a pair of tubular or rod-shaped workpieces or a combination thereof, which are gripped in opposition, under pressure while mutually rotating,
A cutting arm oriented toward the outer peripheral direction of the workpiece, which has a burr cutting blade for cutting the outer burr generated in the pressure contact portion, is provided on the forehead of the spindle that holds and rotates the chuck that holds the short workpiece on the rotating side. And a burr cutting blade position adjusting means for adjusting a swing angle by a plunger to arbitrarily adjust a distance between the burr cutting blade and a shaft core. 2. The friction welding machine according to claim 1, wherein the cutting arm overhangs the outer protrusion of the short workpiece on the rotating side to deburr the protrusion.