JPS5853389A - Friction pressure-welding machine - Google Patents

Abstract

PURPOSE:To execute a friction pressure-welding work smoothly and stably, by preventing a slit between a material to be worked and a clamp pawl for clamp- chucking it, when each material to be worked is pressure-welded and is junctioned by friction heat generated by rotation. CONSTITUTION:In case when the first working piece W and the second working piece W' are pressure-welded by friction, W is clamp-chucked by a chuck 5 of a rotation pressure-welding mechanism A, is pressure-welded to W', is rotated at a high speed, is plastically deformed by friction heat of the contact surface, and is junctioned. In this case, a fixed stopper bracket 6 is provided in front of the chuck 5, and also to a spindle box 3 side to which the chuck 5 has been attached, a moving stopper bracket 7 is installed so that it can execute a reciprocating motion in the axial direction. These brackets are connected by plural tie rods 8, 9, and to the latter 7, a thrust cylinder 10 for driving the spindle box 3 is installed. When W and W' are pressure-welded and rotated, the substance W' to be worked is strongly clamp-chucked by clamp pawls 53, 54, 68 and 74 of clamp mechanisms D, E1 and E2 being adjacent to the fixed stopper bracket 6, and no slip occurs.

Description

[Detailed Description of the Invention] The invention is to generate frictional heat in the contact area of a pair of workpieces using a rotational speed difference and contact pressure with added axial thrust, causing plastic deformation, and joining the workpieces by abruptly stopping the rotation. This invention relates to a friction welding machine designed to do this.

In general, a friction welding machine consists of a clamping rotation mechanism consisting of a spindle box, chuck, etc. that clamps and rotates one workpiece, a clamp mechanism that clamps and holds the other workpiece in a non-rotating state, and a clamp mechanism that clamps and holds the other workpiece in a non-rotating state. The thrust receiving mechanism receives the thrust acting on the thrust force. However, in conventional friction welding machines, the thrust receiving mechanism is arranged corresponding to the rear end of the work piece, so it is necessary to adjust the position of the stopper of the thrust receiving mechanism according to the length of the work piece. Therefore, the adjustment is not only troublesome, but also the structure is complicated and the entire device becomes large.

In addition, in the conventional friction welding machine, the clamp mechanism installed on the top surface of the frame receives part of the thrust that acts on the work piece during pressure welding, so the entire clamp mechanism is centered around the lower end attachment part. This causes the frame itself to bend due to the bending load acting on the clamp mechanism, resulting in a defect in that the centering function of the clamp mechanism deteriorates, making accurate joining work difficult. If such deterioration of the alignment function is to be minimized as much as possible, a problem arises in that the clamp mechanism or frame must be enlarged.

The first object of the invention is to support a spindle box on the upper surface of the frame so that it can reciprocate in the direction of contact with the work piece, and to fix a rotary stopper bracket upright so as to be located in front of the box. Similarly, a movable stopper bracket is installed on the upper surface of the frame to prevent reciprocating movement between the contact pressure sides.
The movable stopper bracket and the fixed stopper bracket are connected by at least a pair of tie rods, and the movable stopper bracket 1 to VCtd M-f
A thrust cylinder for reciprocating the spindle hook is installed, and a plurality of clamp mechanisms are installed on the upper surface of the frame so that their clamp claws are in contact with or close to each other, and the rearmost clamp claw is attached to the MU fixed topper. It is an object of the present invention to provide a friction welding machine that can achieve the following (1) and (2) by arranging them in parallel so as to contact or be close to the front surface of a bracket.

■ Pressure welding lf; A slip is caused between the clamp claw of the clamp mechanism and the workpiece by the thrust acting on the workpiece at f; the clamp claw is brought into close contact with the stopper bracket,
To said thrust! The clamping claw and the fixing shaft are received by the tie rod via the flange bracket, thereby eliminating the bending load acting on the clamping mechanism and the frame in the pressing direction, thereby preventing deterioration of the alignment function.

■ The clamp mechanism and frame can be made smaller, and the thrust receiving mechanism corresponding to the rear end of the work piece can be omitted, making the entire device more compact.

A second object of the invention is to provide, in addition to the configuration of the first object, a clamp claw contact mechanism that presses the clamp claws of a plurality of clamp mechanisms toward the fixed base 1 and the collar racket to make them come into close contact with each other. By this, in addition to the first point,
To provide a friction welding machine capable of performing smooth welding work by preventing slippage between a clamp claw and a workpiece completely clamped by the clamp claw during pressure welding.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, an embodiment embodying a friction welding machine that achieves the first object will be described with reference to FIGS. 1 to 9.

The friction welding machine of this embodiment, as shown in FIGS. 1 and 2, grips and rotates the first workpiece W while moving it in the direction of press-welding it to the second workpiece W1. The rotating contact pressure mechanism A, the counter contact pressure mechanism A, the main centering clamp mechanism described above, and the first and second floating clamp mechanisms El and E2 respectively cooperate with each other to generate the first. A thrust receiving mechanism B capable of receiving the thrust acting on the second workpieces W and W′, and a gripping force for clamping the tip of the second workpiece W′ and holding it in a predetermined position. A weak auxiliary centering clamp mechanism C and a fixed stopper located behind the clamp mechanism C and constituting the thrust receiving mechanism B are used to clamp the middle part of the second workpiece W+ in close proximity to the bracket B. The main centering clamp mechanism has a strong gripping force to hold it in place.
It is arranged close to the clamping mechanism, and clamps the middle part of the second work piece W by catching the outer mill oil fe.
The first and second floating clamp mechanisms E1 and E2, which have two strong gripping forces, and the clamp claws 53 (54) of the clamp mechanisms are attached to the first and second floating clamp mechanisms E1. E2 clamp claw 68.7
With the clamp claw close contact mechanism F that allows 4 to be in close contact with each other! ll is configured.

Therefore, among the above-mentioned mechanisms, the rotary contact mechanism A and the thrust receiver MB for the first workpiece W will be explained with reference to FIG. 1.2. A spindle box 6 is supported on the table 2 in a reciprocating slide I''OJE in the left-right direction in FIG. A spindle 4, which is rotated at a rolling speed by a motor (not shown) and suddenly stopped by a stop mechanism, is supported in parallel between the contact pressure sides.A chuck for gripping the first workpiece W is provided at the tip of the spindle 4. 5 is installed.

A fixed stopper bracket 6 constituting the thrust receiving mechanism B is erected on the upper surface of the right end of the frame 1, and a movable stopper bracket 7 is mounted on the left side of the upper surface of the frame 1 so as to correspond to the bracket 6. It is supported so that it can reciprocate in the left and right direction by planar sliding contact.

The movable stopper bracket 7 and the fixed stopper bracket 6 are connected and fixed by a pair of tie rods 8 and 9 that receive thrust. A thrust cylinder 10 is fixed to the rear surface of the movable stopper bracket 7, and its piston rod 11 passes through the bracket 7 and is connected to the H-side spindle box 6.

In this embodiment, the spindle 4 and the piston rod 1
1, and the pair of tie rods 8 and 9 are disposed at equal distances from the instep axis 0 and 180 degrees apart (see FIG. 3). Therefore, when the piston rod 11 of the thrust cylinder 10 is moved to the right in FIG.
, the chuck 5, etc. are moved together in the same direction, and the tip of the first workpiece W is pressed against the tip of the second workpiece W', so that the first workpiece W is pressed against the tip of the second workpiece W'. When a thrust force is applied to the second workpieces w and w', the reaction force is applied equally to the chuck 5, spindle 4, box 6, piston rod 11, thrust cylinder 10, and movable stopper bracket 7, and to the pair of tie rods 8.9. communicated.

Next, referring to FIG. 3, the auxiliary centering clamp mechanism C, which clamps and holds the tip of the M2 work piece W' in a non-rotating fixed position, will be explained with reference to FIG. A support stand 12 is fixed horizontally to the VC so as to be perpendicular to the center I111II line 0 of the spindle 4, and a slide base 16 is fixed to the upper surface of the support stand 12. There are fixed brackets on both sides of the top of the slide base 16) '1
4 and 15 are arranged, and both brackets 14.
, 15, a movable bracket i6.17 is supported so as to be able to reciprocate around the central axis Ovc. The front vertical orientation 16EL. of the movable bracket 16.17. 17f
L, horizontal surfaces 16b and 17b [respectively shim plate 1
Clamp claws 19 and 20 are tightened and fixed by bolts 21 via 8. Incidentally, arc-shaped pads 22 are fitted on the front surfaces of the clamp claws 19 and 20, respectively, and keys 26 are fitted on the lower surfaces for transmitting thrust to the movable brackets 16 and 17 during pressure contact.

The fixed bracket 14.15 has an equalizer lever 2.
4.25 are rotatably supported by pins 26.27, and an equalizer link 28 is connected to the lower ends of both levers 24, 25 by pins 29.30 to form a parallel four-bar link. It is sectioned. Further, other equalizer levers 33 and 34 are connected to the front end of the equalizer lever 24 and 25 by pins 31 and 32, and the same lever 66
, 64 are connected to the movable brackets 1-16 and 1-17 through pins 35.56VC.

On the other hand, a clamp cylinder 67 is fixed to the rear end surface of the fixed bracket 14, and a connecting link 40 is articulated by a pin 69 between a piston rod 68 of the cylinder and one end of the equalizer link 28. . Therefore, when the clamp cylinder 37 is actuated and its piston rod 68 is moved to the left in FIG. The levers 65, ) 4, the movable brackets 16, 17 and the clamp claws 19, 20 are rotated clockwise in FIG. The tip of the second workpiece W is clamped and held in a fixed position.

Next, the aa main centering clamp mechanism is shown in Figures 4 and 5.
To explain the figure, a support stand 41 is fixedly installed on the upper surface of the frame 1 in a horizontal direction perpendicular to the central axis O of the spindle 4. 42, 46 are arranged, and furthermore, clamp cylinders 44, 45 are arranged at the rear end portions of the double-forced seat frames 42, 43.
are fixed so that they are facing each other. the kite frame 42,
A movable bracket 46, 47 is slidably supported within the shaft 43 so as to be movable towards and away from the center axis O of the spindle 4. It[f] As shown in FIG. 5, the tip surface of the piston rod 48 of the clamp cylinder 44.45 has four parts 47B formed on the rear end surface of the movable bracket 46.47 (only the 47 side is shown in FIG. 5). A connecting block 49 in the shape of a rectangular plate that is loosely fitted is fixed by a bolt 50. Key grooves are formed on both sides of the connecting block 49 and on both sides of the recess 47, and a key 51 is loosely inserted therein. Therefore, when the piston rod 48 of the clamp cylinders 44 and 45 is reciprocated in the front-rear direction, the movable bracket 47 is reciprocated in the same direction via the connecting block 49 and key 51.

The movable brackets 1 to 46.47 have vertical surfaces 4 b, 47b and horizontal surfaces 4 (SC, 470) of the movable brackets 1 to 46.47.
It is fixed by 5. Note that the clamp claw 53.
An arc-shaped pad 56 that clamps the outer circumferential surface of the second workpiece W' is fitted onto the opposing surface of the second workpiece W′, and a second
Processed piece W'&? : Acting thrust force ■ Moving bracket 46.
A key 57 for transmitting information to 47 is inserted.

As shown in FIG. 5, the nM clamp claws ii++i
A fixed pressure receiving ring 58 that receives thrust during pressure welding work is fitted into the four parts 54aK formed on the side surface.

A movable pressure receiving ring 59 is engaged with a pressure receiving surface 58a having an arcuate cross section formed on the inner edge of the ring 58 so as to be slidable in any direction. Furthermore, a pressure receiving metal fitting 60 is fitted into the n-th movable pressure receiving ring 59, and is fastened to the cyclic ring 54 by a bolt 61. A surface contact holding mechanism for bringing the clamp claw 54 into surface contact with the fixed stopper bracket 6 is formed by these fixings, the movable pressure receiving rings 58, 59, the pressure receiving metal fittings 60, the bolts 61, and the like.

On the other hand, a pressure receiving member 62 is fixed to the mouth of the fixed stopper bracket 6 so as to correspond to the pressure receiving metal fitting 60, and a certain minute gap Gl is formed between the pressure receiving member 62 and the pressure receiving metal fitting 60. It is formed. The smaller the gap G1 is, the more desirable it is, and it is also possible to eliminate it and make the two contact each other.
In this case, manufacturing and assembly problems may occur, and parts may be easily worn out, so the resistance is usually set at 0.1 to 0.3.

As shown in FIG. 4, leg pieces 46d and 47d are integrally formed on the lower front sides of the movable brackets 46 and 47, respectively.
A pair of equalizer links 65 are connected by pins 66 between both ends of an equalizer lever 64 rotatably supported by a support shaft 63 at the center of the equalizer lever 64 . Therefore, when the movable bracket 46.47 is pushed by the piston rod 48 of the cylinder 44.45, both brackets l-46 are moved by the lever 64 and the link 65.
.

47 and clamp claws 53 and 54 are moved at a constant speed, and the second workpiece W1 is aligned with the center axis NO by the clamp claws 53 and 54.
It is clamped and held in a fixed position that corresponds to the

Next, the auxiliary and main centering clamp mechanisms C1DK are connected to two first and second workpieces that are configured to clamp the second workpiece W' that is clamped in the fixed position, following the curves on both sides of the second workpiece W'. Floating clamp i[E+.

Of E2, the first floating clamp mechanism El provided with the clamp claw close contact mechanism F will be explained with reference to FIGS. 6 to 8.

As shown in FIG. 6, this clamping mechanism El has a movable bracket l-46,
The equalizer mechanism that interlocks 47 at a constant speed is omitted and the bracket) 46. A pair of left and right clamp claws 6 for 47
8.68 is different in that it is supported floatingly,
The rest of the structure is the same as that of the main centering clamp mechanism, so of the pair of different left and right floating mechanisms, the right clamp claw 68 will be described.

As shown in FIG. 7, the front vertical surface 4 of the movable bracket 47
71) is formed with cylindrical pressure-receiving concave surfaces 47e on the upper and lower right sides, and two pawl support rods 67 are erected and fixed on the horizontal surface 470, as shown in FIG.

A clamp claw 68 is loosely fitted to the nM recorder support 67 so as to be able to float in any direction. The clamp claw 68
The middle part of the support rod through hole 68B (in this case, the support ring part 6
8b is integrally formed. A spring receiver 69 and a plurality of disc springs 70 are provided between the horizontal surface 470 of the movable bracket 47 and the lower surface of the support ring portion 68b, and between the ring portion 68b and the head 67a of the support rod 67.
are interposed therebetween to elastically hold the clamp claw 68 in a state floating above the horizontal surface 470. In addition, l'N
A lid 71 is hissed to the end of the through hole 68a.

The movable bracket 47 is provided on the rear surface of the clamp claw 68.
Arc-shaped pressure-receiving convex surface 7 that is in close contact with the four arc-shaped pressure-receiving surfaces 478
A pressure receiving block 72 having a shape 2a is fixed thereto. The pressure receiving block 72 is mounted on the upper part of the movable bracket 47.
A stopper plate 76 for regulating the upper -\ position is fixed to the bolt.

Therefore, when the piston rod 48 of the clamp cylinder 45 is moved in the direction of the arrow in FIG. It is moved and pressed against the outer surface of the held second work piece W. At this time, since the clamp claw 68 is supported in a floating manner with respect to the movable bracket 47, the entire pad 56 is brought into contact with the rotating circumferential surface KM following the outer circumferential surface of the second work piece W1 which is clamped in a fixed position. For this reason, the circumferential surface of the second workpiece W1 may be locally strongly pressed and damaged, a bending reaction force may be generated in the clamp claw 68, or the second workpiece W1 may be damaged due to poor contact between the pad 56 and the workpiece W. This eliminates the possibility of deterioration of the thrust retention function that acts on the engine. In particular, having such a floating clamp mechanism is very effective for clamping workpieces such as seamless pipes for oil drilling, which have extremely poor coaxiality.

Another second floating clamp mechanism E2 interposed between the main centering clamp mechanism and the first floating clamp mechanism E1 is configured almost the same as the first floating clamp mechanism El. As shown in FIG. 9(a), minute gaps G2 (0.1 to 0.3-) are provided between the clamp claws 74.74 of the second floating clamp mechanism E2 and the clamp claws 53.54, respectively. ing. Also, there is a minute gap G8 (0,1 to 03
fl) is provided.

Next, a pair of clamp claw contact mechanisms are provided that bring the clamp claws 68, 68, 74, and 74 of the first and second floating clamp mechanisms El and E2 into close contact with the clamp claws 53, 54 of the main centering clamp mechanism (2) mentioned above. The close contact mechanism F on the right side of F will be explained with reference to FIG.

A bracket 75 is fixed horizontally to one side of the fixed guide frame 46, and a central portion of a lever 77 for pressing the clamp claw is supported to the bracket 75 so as to be horizontally rotatable by a support shaft 76. Similarly, a relatively small-capacity cylinder 78 is fixed to one side of the guide frame 46, and the tip of a piston rod 79 of the cylinder 78 is connected to the rear end of a lever 77. In addition, the tip of the lever 77 is bent at a right angle toward the clamp pawl 68 and comes into contact with the end surface of a pressure receiving fitting 60 similar to the one described above, which is formed and arranged at the end of the same mold 68. It is considered possible.

Therefore, the piston rod 79 of the cylinder 78
When the clamp claw is pushed out in the direction of the arrow in the figure, the lever 7
7 is rotated in the clockwise direction in FIG. 7 around the support shaft 76,
The clamp claw 68 in the floating state is connected to the lever 77.
The clamp claw 74 is rotated and pressed by the clamp claw 74 (it can be moved by a set amount depending on the size of the gap between the arcuate pressure receiving concave surface 47e and the arcuate pressure receiving convex surface 72a). Closely attached to the clamp claw 54 of the main centering clamp mechanism, three clamp claws 68, 74, 5
4 is tightly pressed together like a single rigid body.

Next, the operation of the friction welding machine configured as described above will be explained.

In FIG. 9(a), the second workpiece W is supported by a support roller (not shown) at a fixed position corresponding to the central axis 0 of the system spindle 4, and each clamp mechanism C, D, PJ1, E2 is in an inoperative state. shows. In order to clamp the second workpiece W' in this state, first compare the tip of the workpiece W with the clamp claw 19.20 of the auxiliary centering clamp mechanism C, as shown in FIG. 9 (1)). While clamping with a weak force (for example, 4 Qton), the clamp claw 53.5 of the main centering clamp mechanism
4 [Apply a relatively strong force (for example, 2
QQton) to hold it in place.

Subsequently, the clamp claws 68.68 and 74.7 of the two first and second floating clamp mechanisms El and E2
4 grips the inner and outer circumferential surfaces of the second workpiece W° with a relatively weak force (for example, 3 Q ton ) (see FIG. 9(b)). After that, the workpiece W was grasped with a relatively weak knife! , or when the clamping pressure is released, the clamp claw contact mechanism F can be pressed by lever 76 (76) by shifting lamp claw 53 (
54), set the clamp claw 74.74.68.68 to the 9th
As shown in Figure (C), close the clamp claw 6 again.
A relatively strong gripping force (for example, 200 tons) is applied to 8.68 and 74.74 to clamp the second work piece W'' along its outer peripheral surface.

After the second workpiece W' is clamped and held in a predetermined position in this way, the thrust cylinder 10 is operated to move the rotating first workpiece W gripped by the chuck 5 as shown in FIG. 9(C). Move the first workpiece W to the right and apply a relatively strong thrust (for example, l 5 Q
ton), frictional heat is generated on the contact surfaces of both workpieces w and wtp, causing plastic deformation, and after a certain period of time, the chuck 5 is suddenly stopped and left as it is, or at the same time as the sudden stop, or slightly After adding more thrust than the above at around the time, the first. The second workpieces W, W" are joined.

By the way, during the pressure welding work shown in FIGS. 9(C) to 9(d), since the movable stopper bracket 7 is movably supported with respect to the frame 1, the thrust cylinder 1
0yoshi 1st. Thrust force T (150t
on), a reaction force of the same strength is applied to the two tie rods 8 and 9, and as a result, the identification stopper bracket 6 fixed to the frame 1 is pulled to the left with a strong force as shown in Fig. 9(d). Trying to get caught. However, at the same time as the pressure welding operation starts, a thrust force T is applied to the second workpiece W'[, and this thrust force is applied to the clamp claw 6, which is in close contact with the clamp claw 6 and becomes like one rigid body.
8°74.53 and 6B, 74.54, so that each clamping claw 68.7456 and 68 substantially fixed to the frame 1 clamps the second workpiece W1.
, 74 and 54 are clamping mechanisms, El and E2, respectively, facing the fixed stopper bracket 6 together with the second work piece W.
is closely attached to the fixed stopper bracket 6 while being slightly elastically deformed. As a result, the fixed stopper bracket l-A J
- The clamp claws b6.54 are in close contact with each other with the same thrust force T, but the 1j8j1 constant stopper bracket 6
Since the gap Gl between the frame 1 and the clamping claw 53 (54) is minute, the clamping mechanism is forced to move between the fixed stopper bracket 6 and the clamping claw before El and E2 are deformed and a large bending load is applied to the frame 1. 53 (54) are in close contact with each other and cancel each other's thrust, so that the fixed stopper bracket 6
Bending load and tensile load do not act on the frame 1 through the clamp m structure D*Et*E2, and the thrust force T
is received by the tie rod 8°9.

In this way, in the above embodiment (corresponding to the second invention), the identification stopper bracket 6, the clamp claw 53 (5
4) A small gap 01 to GB is provided between 74.68 and the clamp claw 74.6 is pressed against the clamp claw 53 (54).
El, E2, and E2. Since the bending load is transmitted to the frame 1 due to the elastic deformation of the fixed stopper bracket 6, the RTIVC clamp claws 53 (54) are brought into close contact with the bracket 6, and the thrust force is received by the pair of tie rods 8, 9, so that the clamp mechanism is Ri, El
, E2, it is possible to prevent deformation of the fixed stopper bracket 6 and the frame 1 to prevent deterioration of the alignment function, and it is possible to reduce the strength of the clamp mechanism and the frame to make it smaller, and furthermore, it is possible to reduce the size of the work piece WFl. By omitting the thrust receiving mechanism corresponding to the rear end, the entire device can be downsized.

Next, a third invention that achieves the first object by omitting the clamp claw contact mechanism F of the second invention described above is shown in FIGS.
(d) will be explained.

In FIG. 1O (a), a clamping force P (200 tons) is applied to the clamps 53 (54) and 74.68, respectively, and the first. The second work piece W,'W shows the instantaneous gold to which a healthy thrust force T (150Lon) is applied. Then, assuming that the friction coefficient μ between the second workpiece W" and each clamp claw 53 (54), 74.68 is 0.3, the thrust receiving capacity R(IIXμ
) are each 5 Q ton. Therefore, when a thrust force T of l 5 Q ton acts on the second workpiece W1, each clamp claw F)) (54), 74°68
At the same time, the clamping claws 53 (54) are moved rearward, and the clamp claws 53 (54) are brought into close contact with the fixed stopper bracket 6 and stopped as shown in FIG.

However, in this state, the gap between each clamp claw is still G2.
There is a G8, and the second work piece W1 has a clamp claw 53 (54).
Since the thrust receiving capacity R (60t on ) and the thrust force T (150 on) applied to the second workpiece W' are large, there is a When the slip occurs, the work piece W1 is moved backward together with the clamp claws 68 and 74, and the clamp claws 53 (54) [clamp claws 7]
4 is closely attached.

However, even in this state, the sum of the thrust receiving capacity H by the clamp claws 5:5 (54) and 74 is 120 tons, so the thrust force T (150 tons) is also smaller. 53 (54) and 74, the second work piece Wl moves backward together with the clamp claw 68, and the reflex lamp claw 68 comes into close contact with the clamp claw 74, and only at this time does the three pairs of clamp claws 53 (54) ,6
The thrust receiving capacity R of 8.74 is 1 80 tons in total, which is larger than the thrust T (15Q ton),
There is no more slippage between the second work piece Wl and the clamp claw, and the work piece W' is stopped.

In this embodiment of the first invention, there are also three gaps O1 to G8.
Since the total length is very small at 0.3 to 0.9 m, the clamp mechanism is used, and the clamp claws are in close contact with each other before the bending load is applied to E and transmitted to the frame 1. There is a minute (0.2~0.
This embodiment differs from the second invention in that there is a slip (6-), and other functions and effects are similar to the embodiments of the second invention.

Incidentally, the non-invention can also be embodied in the following examples.

(1) In the above example, a king-centering clamp mechanism was used, but a floating clamp mechanism that omitted this mechanism was used.
K to change. In this alternative example, an auxiliary centering clamp mechanism C is further provided behind the stopper bracket 6.

(2) One or more floating clamp mechanisms E1, E2 of the embodiment shown in FIG. 2vc may be provided.

(3) In the above embodiment, two tie rods 8 and 9 were used, but three or more tie rods should be used. In this case, it is assumed that the central axis O of the spindle 4 is located inside the figure connecting the tie rods.

(4) The pressure-receiving block 72 may be rotatably attached to the clamp claw 68, or attached to the surface of the river for relative movement in the horizontal direction, or the structure may be a combination of both.

As described in detail above, the present invention allows the tie rod to receive the thrust force acting on the work piece during pressure welding via the clamp mechanism and the 1D constant stopper bracket, thereby eliminating the bending load acting on the clamp mechanism and frame in the pressure welding direction. In addition to preventing deterioration of the alignment function and performing accurate machining work, the clamp mechanism and frame can be made smaller, and the rear end of the work piece and the corresponding thrust receiving mechanism are omitted, making the entire device more compact. There is an effect that can be done.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of an uninvented friction welding machine, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged sectional view taken along the line X--X of Fig. Figure 4 is an enlarged cross-sectional view taken along Y-Y line in Figure 1, Figure 5 is an enlarged cross-sectional view taken along line 2-2 in Figure 4 C, Figure 6 is an enlarged half-sectional view taken along line H-H in Figure 1, and Figure 7 is an enlarged cross-sectional view taken along line H-H in Figure 1. The figure is I- in Figure 6.
8 is an enlarged sectional view taken along the J-J line in FIG. 7, FIGS. 9(a) to 9(d) are road body plan views illustrating the pressure contact action, and FIG. 10(a) is an enlarged X-ray sectional view. -(d) are off-road plan views showing the pressure contact action of the embodiment of the first invention. Frame 1, spindle box 3, spindle 4, chuck 5, stopper bracket 6, movable bracket 7,
Tie rods 8, 9, thrust cylinder 10, auxiliary centering clamp mechanism C1 main centering clamp mechanism D1 floating clamp mechanism E1, E2, clamp claw contact mechanism F,
Gap 01 to G8, 1st. Second processed piece W, W B Patent applicant Toyota Industries Corporation representative Patent attorney On 1) Hironobu

Claims (1)

[Claims] (1) A spindle box is attached to the frame so as to be able to reciprocate in the axial direction of the spindle, and a chuck for gripping the work piece is attached to the tip of the spindle, and the frame is also attached to the A fixed stopper bracket is erected and fixed so as to be located in front of the chuck, and a movable stopper bracket is installed so as to be movable back and forth in the axial direction so as to be located on the spindle box side, and these brackets are used for receiving thrust. The dynamic stopper bracket is connected by a plurality of tie rods, and a thrust cylinder that can reciprocate is attached to the NU spindle box, and the frame is mounted between the chuck and the fixed stopper bracket. A plurality of clamp mechanisms for clamping the second workpiece are arranged in parallel so that the fixed stopper bracket, the clamp claw of the clamp mechanism adjacent to the bracket, and the clamp claw of each clamp aim'ff
:A friction welding machine characterized by a contact or a small gap. 2. The friction welding machine according to claim 4, wherein a centering clamp mechanism is arranged near the fixed stopper bracket, and one or more floating clamp mechanisms are arranged in parallel near the centering clamp mechanism. 8. The centering clamp mechanism consists of a slide base disposed in a horizontal direction perpendicular to the direction in which the workpiece is pressed against the upper surface of the frame, and a pair of fixed brackets attached to both ends of the slide base. , also the second one on the slide base.
A pair of movable brackets rotate around both sides of the workpiece to support it so that it can be approached and separated, a pair of clamp claws are set in opposite directions on both movable brackets, and the movable bracket is reciprocated at a constant speed. IJ so that it can move? The friction welding machine according to claim 2, wherein the friction welding machine comprises an equalizer link Sakaki sweeper and a clamp cylinder that operates the equalizer link mechanism. 4. The floating clamp mechanism has a slide base arranged in a horizontal direction perpendicular to the pressure contact direction of the workpiece against the top surface of the frame, and can approach and separate from the slide base by rotating around both sides of the workpiece. a pair of movable brackets supported by the slide base, a pair of clamp cylinders which are identified opposite to each other at both ends of the slide base and actuate the movable brackets; The friction welding machine according to claim 2, comprising a pair of clamp claws that are supported in a floating manner via an elastic member. 5 Attach the anti-sys spindle hook to the frame so that it can reciprocate in the direction of the fine line of the spindle, and
A chuck for gripping the first work piece is attached to part 4, and a stopper bracket 1211 is also erected and fixed on the frame so as to be located in front of the chuck, and a stopper bracket 1211 is installed on the n1f spindle hook side. Move the operating shaft I/flange bracket back and forth in the axial direction so that -r+]
The movable stopper bracket is equipped with a thrust cylinder capable of reciprocating the spindle hook, and the brackets are connected to multiple tie rods for receiving thrust, and the movable stopper bracket is equipped with a thrust cylinder capable of reciprocating the spindle hook, and is i
ffff A plurality of clamp mechanisms for clamping the second work piece are all arranged in parallel so as to be located between the middle rack and the stopper bracket 1, and a clamp mechanism adjacent to the stopper bracket and the same bracket is installed. The clamp claws and the clamp claws of each clamp mechanism are brought into contact with each other or are matched with each other with a small gap, and further, the clamp claws of each of the clamp mechanisms are pressed toward the No. fixed stopper bracket side to bring the respective clamp claws into close contact with each other. A friction welding machine characterized by having a close contact mechanism. 6. The clamp pawl contact mechanism has a clamp pawl that is rotatably supported on the side of the fixed guide frame that supports the movable bracket of the clamp mechanism located at the farthest position from the fixed stopper bracket. The friction welding machine according to claim 5, wherein the friction welding machine comprises a moving cylinder.