JPS61212490A - Stopper position shifting device for single head type friction welding machine - Google Patents

Abstract

PURPOSE:To improve a productivity by providing a stopper cylinder respectively on the stopper of rotary side and non-rotary side and by enabling the displacement of the bearing end face for blank of each stopper at least more than two positions. CONSTITUTION:Stopper cylinders 14, 20 are respectively arranged on the rotary side stopper 6 and non-rotary type stopper 10 of single head type friction welding machine. The hydraulic circuit is made so that the cylinders 14, 20 are actuated simultaneously with the shifting of a shifting valve 21. The stroke S1 of the cylinder 14 is set corresponding to the differential size of two blanks W1, W2. The step difference of the backing faces 18, 19 of the stopper 10 at non-rotary side is set by the blank conditions further. After performing the friction welding of the blank W1 and W2 the stoppers 10, 20 are respectively actuated by shifting the shifting valve 21 and the blank backing face 19. The productivity is increased by the shortening in the arrangement time.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a single-head friction welding machine that is effective when friction welding one material to each end of another material, one side at a time. The present invention relates to a device that changes the position of a stopper that receives thrust acting on a material in accordance with the length of the material during friction welding.

(Prior Art) As shown in FIG. 5, one material W1, such as a vibrator material, has two different materials W2 at both ends. W3 (
As for concrete objects to be welded, for example, vehicle parts such as axle housings can be friction welded one by one.There are two methods for friction welding one object at a time using a double-head friction welding machine, and a method of simultaneously welding one object using a double-head type S* pressure welding machine. A method of pressure-welding the parts one by one is known.

The former double-headed type j! In the method using the J friction welding machine, as shown in FIG. Another material W2 held by the chuck 5. W3 is brought into rotational contact with both ends of the material W1 at the same time, and friction welding is carried out.

In the latter method using a single-head friction welding machine, as shown in FIG. The raw material W2 is brought into rotational contact to perform friction welding on one side, and then the raw material W1 gripped by the clamping device 9 is reversed and re-clamped, and then the other end of the rope material W1 is attached to the chuck 5 of the headstock 2. Friction welding is performed by bringing another gripped material W3 into rotational contact.

By the way, the axial force that acts on the material during friction welding, that is, the thrust, is generated on both the rotating and non-rotating sides (double-headed type
In the case of Il friction welding machines, both rotating sides) are received by the chuck 5 or the clamping stopper of the clamping device 9. Therefore, when the length of the material to be pressed differs, it becomes necessary to adjust the position of the stopper accordingly.

(Problems to be Solved by the Invention) In the case of the former double-headed friction welding machine, the work efficiency is good because it is a simultaneous welding method. Although it has the advantage of not requiring readjustment once the position is set (as long as the same type of parts are pressure welded), on the other hand, it is expensive, large and requires a large installation area for small-volume production. It is unsuitable because it requires

On the other hand, when using the latter single-head friction welding machine, since the length of the material differs between the first and second welding, the position of the stopper must be adjusted in accordance with the length of the material. For this purpose, conventionally, on the rotating side, a stopper block 30 for receiving the material is inserted into the main shaft 4 from the chuck 5 side as shown in FIG. 6 so that it can be attached and detached to the master stopper 31, and As shown in Fig. 7, a stopper block 33 for receiving the material is removably attached to the stopper 32, and the stopper blocks 30 and 33 are replaced with ones corresponding to the length of the material. The receiving position is being adjusted.

However, in the method of replacing the stopper blocks 30 and 33 as described above, if the stopper blocks 30 and 33 are replaced each time one friction welding is completed, the efficiency of the preparation work for the welding work is significantly reduced. If there is a problem that the stopper should be replaced, or if a predetermined number of materials are crimped on one side in succession and then set up to be crimped on the other side, the stopper needs to be replaced only once to adjust its position.
Although it only takes a few times, in this case, a space must be secured to temporarily store the materials that have been friction-welded for the first time, and this also has the problem of affecting subsequent processes.

In view of the above problems, the present invention aims to solve the problem by providing each stopper on the rotating side and non-rotating side of a single-head friction welding machine with a function of adjusting the material receiving position by displacement of the stopper itself. This is a technical issue that should be addressed.

(Means for solving the problem) The technical means for solving the above problem is that the headstock that grips the rotating side material to be welded and the thrust cradle that grips the non-rotating side material are coaxial. In a single-head friction welding machine that is installed facing each other so as to be aligned on a line, the material receiving end surfaces of each stopper on the rotating side and non-rotating side for receiving the thrust acting on the material are aligned with the welding axis. The stoppers can be moved to at least two positions in the direction, and the stoppers can be moved to set positions using a stopper cylinder.

(Function) When joining two materials of different lengths one by one to both ends of one material, friction welding is performed on one side with the stoppers on the rotating side and the non-rotating side set to the forward position, for example. Then, by operating the stopper cylinder, the positions of the rotation side and non-rotation side stoppers are switched to the retreat position, and with the material on the non-rotation side reversed,
Friction welding can be performed on the opposite side.

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings. As shown in Fig. 3, a single-head friction welding machine basically consists of a headstock 2 as a rotating side and a headstock 2 as a non-rotating side, which are aligned and facing each other on the same axis on a bed 1. It consists of a thrust cradle 8.

The headstock 2 includes a hollow main shaft 4 that is rotationally driven by a drive motor 3, a chuck 5 for gripping the material connected to the tip of the main shaft 4, and a chuck 5 for receiving the material disposed on the rear side of the main shaft 3. It is equipped with a stopper 6 and a slide cylinder 7.
Thrust force for friction welding is added by this. On the other hand, the thrust pedestal 8 includes a clamp device 9 for gripping the material, and a stopper 10 for receiving the rear end of the material on the rear side of the clamp device 9.
The material is gripped from the sides by a pair of clamp claws 12 which are opened and closed using a clamp cylinder 11 as an operating device. In the above embodiment, the headstock 2 is configured to slide on the bed 1, but the thrust cradle 8 may also be configured to slide.

Next, a position switching device for the rotation-side stopper 6 and the non-rotation-side stopper 10 will be explained based on FIG. 1.

First, to explain the rotation side, a stopper cylinder 14 is concentrically connected to the main shaft 4 through a coupling 13 to the rear end of the main shaft 4.
A stopper 6 is attached to a piston 15 that is slidably fitted into the piston 15.
are connected.

The rod-shaped stopper 6 passes through the cylindrical hole of the main shaft 4 and extends toward the front, that is, toward the chuck 5, and receives the material at its tip. That is, the stopper 6 adjusts the material receiving position by moving axially within the main shaft 4 together with the piston 15 of the stopper cylinder 14.

Next, to explain the non-rotating side, the stopper 10
is provided with a fixed stopper 16 erected on the rear side of the clamp device 9, and a fixed stopper 16 disposed on the front side of the fixed stopper 16 so as to be movable in a direction transverse to the pressure welding axis, and whose rear end surface is received by the fixed stopper 16. It consists of a movable stopper 17.

The movable stopper 17 has two material receiving surfaces 18 and 19 on its front end for receiving the material, and by being moved by the stopper cylinder 20, the two material receiving surfaces 18 and 19 are arranged on the pressure welding axis. The material receiving position is adjusted by selectively matching 19.

Further, the hydraulic circuits of the stopper cylinder 14 of the rotation-side stopper 6 and the stopper cylinder 20 of the non-rotation-side stopper 10 described above are configured to operate synchronously by switching the switching valve 21. Note that since the stopper cylinder 14 of the rotation-side stopper 6 rotates together with the main shaft 4, the piping therefor is connected via a rotary joint, although not shown.

This embodiment is constructed as described above, and a pipe-shaped material W having a length Ll as shown in FIG.
At one end of 1 is a material W2 with a length of L2 (11>L2), and at the other end is a material W3 with a length of L3 (Ll>L3>L2).
) will be explained as a case of joining.

In this case, the stroke S1 of the stopper cylinder 14 of the rotation-side stopper 6 is the same as that of the two materials W2.
It is set corresponding to the dimensional difference (L2-13) of W3. Further, the height difference S2 between the two material receiving surfaces 18 and 19 in the non-rotating side stopper 10 is the difference in height between the material W1 and the material W2.
Length L1+12 after the first friction welding with
- approach distance) and the length Ll of the material W1 before friction welding.

In the first friction welding, by switching the switching valve 21 to the forward position, both the stopper cylinders 14 and 20 of the rotation-side stopper 6 and the non-rotation-side stopper 10 are operated forward. As a result, the rotation side stopper 6
is set at the forward position corresponding to the forward end of the piston 15, and the movable stopper 17 of the non-rotating side stopper 10 is set so that the higher material receiving surface 18 corresponds to the pressure welding axis.

Subsequently, the workpiece W2 is gripped by the chuck 5 on the rotating side, and the workpiece W1 is gripped by the clamping device @9 on the non-rotation side, but at this time, the workpiece W1. The rear ends of W2 are respectively received by the stoppers 6 and 10 positioned as described above, and in this state, the first friction welding is performed to join the material W2 to one end of the material W1. .

After the first rfJ friction welding is completed, both stopper cylinders 14.
20 respectively. As a result, the rotating stopper 6 is set at a retracted position corresponding to the retracting end of the piston 15, and the lower material receiving surface 19 of the movable stopper 17 of the non-rotating stopper 10 is set on the pressure axis.

Next, on the clamping device 9 side, the material W1 that has been subjected to the first S* pressure welding is reversed and grasped again, while on the rotating side, the material W3 is grasped by the chuck 5, but at this time, Similarly, the rear ends of the material Wl (actually material W2 joined to material W1) and material W3 are respectively received by the stoppers 6.10 positioned as described above, and in this state , a second friction welding is performed to join the material W3 to the other end of the material W1.

Next, another embodiment of the present invention will be described based on FIG. 2. This embodiment relates to a non-rotating stopper 10, in which a stopper 10 formed into a rod shape as shown in the figure is moved in the axial direction on the pressure axis by a stopper cylinder 20 concentrically and directly connected to the stopper 10. The structure is such that the material receiving position can be adjusted by Therefore, in this case, the stroke S3 of the stopper cylinder 20
, the two material receiving surfaces 18 and 19 in the above-mentioned embodiment
By setting the height difference to correspond to the height difference S2 of the steps, the first and second friction welding can be performed at a predetermined material receiving position in the same manner as in the above-described embodiment.

In addition, in this embodiment, since the stopper cylinder 14.20 that completely changes the position of the stopper 6.10 is hydraulic, the W1 adjustment of the stopper 6.10 is not limited to the two stroke end positions but also at the stroke end. As long as it is within the range, it can be set as appropriate, but this hydraulic cylinder can also be changed to an air cylinder if necessary.

Further, the switching valve 21 may be of an electromagnetically operated type instead of the manually operated type shown in the figure. In that case, the switching valve 21
It is possible to automate the switching operation of the stopper 6.10, that is, the switching operation of the stopper 6.10.

Furthermore, in this embodiment, both the rotation side and non-rotation side stopper cylinders 14.20 are configured to operate synchronously, but this may be changed to a configuration in which they operate individually. This method is applicable not only to joining materials of different lengths to each end of the material W1, but also to joining materials of equal length. That is, the rotation side stopper 6
For non-rotating side stopper 1, do not adjust the position.
By adjusting the position of only 0, equal length materials can be joined alternately.

Further, by adopting a configuration in which a separate stopper block is attached to and detached from the tip of each stopper 6.10, it is possible to easily accommodate changes in the type of press-welded products.

(Effects of the Invention) As described in detail above, according to the present invention, when joining one material to each end of one material using a single-head friction welding machine, the first and second welding During pressure welding,
The material receiving position can be adjusted by displacing both the rotating side and non-rotating side stoppers for receiving the thrust acting on the material using the stopper cylinder, so compared to the conventional method of replacing stopper blocks, the receiving position can be adjusted. This greatly reduces setup time for adjustment, which greatly helps improve productivity. Furthermore, in the present invention,
As the receiving position can be easily adjusted using the stopper, it is now possible to perform friction welding on both ends of the material alternately, one side at a time, allowing the welded parts to be sequentially transferred to the subsequent process, thereby speeding up production line operation. It no longer inhibits sexuality.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention, FIG. 2 is a side sectional view showing another embodiment of the present invention, and FIG. 3 is a schematic side view showing a single-head friction welding machine. Fig. 4 is a schematic side view showing a double-head friction welding machine, Fig. 5 is a cross-sectional view showing a counter-dye material to be welded, Fig. 6 is a cross-sectional view showing a rotation side stopper in a conventional single-head friction welding machine, and Fig. 7 The figure is also a side view showing the non-rotating side stopper. 1... Bed 2... Headstock 5... Chuck 6... Stopper 8... Thrust cradle
9... Clamp device 10... Stopper 1
4...Stopper cylinder 20...Stopper cylinder

Claims (5)

[Claims] (1) In a single-head friction welding machine in which the headstock that grips the rotating side material to be welded and the thrust cradle that grips the non-rotating side material are installed facing each other so that they are aligned on the same axis. , the material receiving end surfaces of each of the rotation side and non-rotation side stoppers for receiving the thrust acting on the material are movable to at least two positions in the pressure welding axis direction, and the stoppers are set by a stopper cylinder. A stopper position switching device for a single-head friction welding machine that can be moved to different positions. (2) A stopper position switching device for a single-head friction welding machine according to claim 1, in which a rotating stopper cylinder and a non-rotating stopper cylinder for switching the stopper position are switched in conjunction with each other. . (3) A stopper position switching device for a single-head friction welding machine as set forth in claim 1, in which a rotating-side stopper cylinder and a non-rotating-side stopper cylinder for switching the stopper position are individually switched and operated. . (4) The stopper position switching device for a single-head friction welding machine according to claim 1, wherein the rotation-side stopper cylinder and the non-rotation-side stopper cylinder for switching the stopper position are both hydraulic. (5) The stopper on the non-rotating side has a plurality of material receiving surfaces arranged at different levels in a direction parallel to the pressure welding axis, and is configured to switch the material receiving surfaces by being displaced in a direction crossing the pressure welding axis. A stopper position switching device for a single-head friction welding machine according to claim 1.