JPS6376777A - Constant phase friction welding method with pressure - Google Patents

Abstract

PURPOSE:To improve accuracy of the welding position with pressure by providing positioning stoppers to a main spindle and the main spindle pedestal side respectively and detecting r.p.m., etc., of the main spindle after the braking to stop the main spindle at the set position via both the positioning stoppers. CONSTITUTION:A single clutch 16 making a couple with an armature 15 is installed on the main spindle 13 and the main spindle side positioning stopper S consisting of a positioning slider 19 is provided to the spindle 13. The stopper 32 is fixed on the outside peripheral edge of a worm wheel 29 installed on a main spindle pedestal 2 and further, the position is made variable and the stopper 32 is made to the fixed side positioning stopper S'. When objects A and B to be joined are rotated and brought into contact with each other and made in a state capable of being heated and welded, an angle of rotation, etc., of the main spindle after the braking are detected mechanically or electrically to stop the main spindle 13 forcibly at the set phase position via the positioning stoppers S and S'. The accuracy of the welding position with pressure can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to an improvement in a constant phase friction welding method.

(Prior Art) The inventors of the present application have already researched and invented a constant phase friction welding method to solve the drawback that the phases of two objects to be welded cannot be aligned with each other in the conventional friction welding method.

That is, by mechanically aligning the objects to be welded on the rotating side and the stationary side, and setting the electrical reference zero point of the rotational position detector at that position, the two objects to be welded are brought into rotational contact so that they can be welded by heat. Then, a predetermined position is detected by an axial simultaneous position detector installed on the fixed side, and its output is inputted to a control device that counts the zero point sequentially measured from the rotational position detector. , a constant phase friction characterized in that, at the zero point of the rotational position detection signal counted next to the input signal, a clutch and brake operation signal is issued to abruptly stop the rotation, and an upset pressure is applied to join the clutch and brake. This is a pressure welding method.

(Problem to be solved by the invention) In the above method, constant phase pressure welding is theoretically possible if the time from applying the brake on the rotating side to stopping is always constant for the workpiece. be. However, in reality, there is some variation in the time (or rotation angle) from applying the brake on the rotating side until it stops, and it varies depending on the pressure welding conditions (workpiece), so it is always in the same position and accurately. Even though it cannot be expected to stop reliably and it is a problem in friction welding of objects to be welded that requires a phase method (Means for solving the problem) This invention was made to solve the above problem. A main shaft with a brake connected to the drive shaft by a single-position clutch is provided with a main shaft-side positioning stopper, and a position-variable fixed-side positioning stopper is provided on the main bearing pedestal. can be heated and welded, and the phase difference between the drive shaft and the main shaft or the rotation angle of the main shaft, which occurs when the single-position clutch is disengaged and the brake is applied, is mechanically or electrically detected, and the previously determined brake is applied. It is an object of the present invention to provide a constant phase friction welding method characterized in that the main shaft is forcibly stopped mechanically by both positioning stoppers at a set position within a rotation angle from when the main shaft is applied until the main shaft stops.

Embodiment/In Figures 1 to S of the drawings, 3 is a drive shaft installed on the left side of the main bearing stand 2 on the left side of the machine base, and is rotated by the main motor S via the transmission medium of the bell seat B. A pulley ≠ is rotatably mounted on the drive shaft 3, and the pulley is integral with the drive shaft 7 and is connected to the drive shaft 3 via a clutch ♂.
9 rotates. Reference numeral 9 is a pulley wedged to the left end of the drive shaft 3, and a belt 2 is hung between it and the clutch-equipped pulley // of the motor 10 with a reduction gear located above. Also, /1 is an integrated gear on the right end of the drive shaft 3.The main shaft /3, which is equipped with a brake 33 on the right side of the main bearing stand 2, drives the left end on the same axis as the drive shaft 3. It is loosely fitted to the right end of the shaft 3 and is rotatably installed. Also, 15 is
The armature is loosely fitted to the main shaft /3, and is fixed to the drive shaft 3 integrally with the gear /l. Furthermore, /B is a single position (single position) clutch which is a pair of parts with the above armature /3, and is attached to the main shaft 3 so as to be movable in the axial direction.
They are connected to each other. Note that /7 is a sensor. Also, /♂ is a cam gear with an integral annular cam.
It is rotatably loosely fitted onto the main shaft /3. /9 is
It is a positioning slide that is slidably installed in the main shaft 13 in the radial direction with the intervention of a spring 22 as shown in Fig. 2, and the trochanter is always inscribed in the cam gear/which cam surface/fa by the action of the spring. 20
is attached to one end to constitute a spindle side positioning stopper S. In addition, /3a in FIG. 2 is a through hole, 13
b is a blind hole, and 21 is a prong. Reference numeral 23 denotes an intermediate shaft above the main shaft /3, on which a gear 2'l meshing with the gear /lI is fixed. Further, an intermediate gear 2j that meshes with the cam gear 2j is loosely fitted onto the intermediate shaft 23. The intermediate gear 25 is normally fixed to the intermediate shaft 23 via a manually operable cam positioning coupling 2B.

In addition, gear/'1.2 Hiro and intermediate gear 2, gear with cam/
The ratio of the number of teeth is /:/, and the intermediate shaft 23 and the main shaft /3 rotate at the same time. Also, the rotational position detector 2
Ir is rotated from the intermediate shaft 23 via the timing belt 27, rotates at the same time as the main shaft/3, and the rotational position of the main shaft/3 can be detected. Reference numeral 29 denotes a worm wheel mounted on the main bearing stand, and a stopper 32 is fixed to the outer peripheral edge of the worm wheel. In other words, the worm wheel 29 is rotated by the rotation of the worm 30 with which it is meshed, and the position of the stopper 32 can be varied by operating a handle provided at the end of the shaft of the worm 30, and the position can be set by the scale on the handle. can. The stopper 32 constitutes a fixed-side positioning stopper S'. Note that 3'A is a rotating side chuck that clamps the rotating side workpiece A on the right end of the main shaft/3. Further, 35 is a fixed side sliding shaft supported by a sliding bearing stand 3B so as to be able to slide left and right, and a fixed side chuck 37 that clamps the fixed side workpiece B is fixed to the left end. Can slide left and right with 3g operation. Reference numeral 110 denotes an axial simultaneous position detector, such as a limit switch, which engages with a dog 39 provided on the sliding shaft 3S, and the objects A and B are brought into rotational contact and can be heated and welded. It is provided at a predetermined position. Then, as shown in FIG. 1A, an operation signal is output to the single-position clutch 16 and brake 33 from the control device into which the output signals from the rotational position detector 21 and the axial self-transport position detector IIO are input, respectively. The control circuit is configured to

First, the two objects A and B are mechanically aligned with each other, and the rotation angle θ from when the brake 33 is applied until the main shaft 13 stops is determined in advance.

Then, in Fig. S, the fixed side positioning stopper S'32 is placed within the rotation angle 0, preferably slightly before the rotation angle θ (PS (a position slightly smaller than the minimum variation in the stop position when there is no stopper (M44N)). Perform position settings. Then, the machine is operated, and both objects A and B can be heated and melted, and the heavy position clutch/6 is disengaged by the command, and the brake 3
3 is applied, a phase difference occurs between the drive shaft 3 (cam gear/J') and the main shaft 13, and the main shaft side positioning stopper S/9 slides through the cam surface lza of the cam gear/g. Then, the main shaft 13 can be forcefully mechanically stopped at a preset fixed position by hitting the fixed side positioning stopper S'32, which is set at a rotation angle of 0 or less.

The setting position of the fixed side positioning stopper S' can be changed by rotating the worm 30 described above. Further, since there is a large difference in phase shift between when the pre-ascertained rotation angle θ is 3000 or more and when it is less than 3000, it is necessary to set the relative positions in advance. In this method, the setting is completed by manually disengaging the cam positioning coupling 2B, rotating the main shaft 3, determining the relative position, and engaging the coupling 2B.

Embodiment 2 In FIG. 6, first, in addition to the drive shaft rotational position detector 2g of FIG.
There is an arm rod t2 on the main shaft 13.
is fixed, and this constitutes the spindle side positioning stopper S. Also, on the main bearing stand λ side, there is, for example, a fluid pressure cylinder.

An operating rod t3 is protruded by a stopper actuating device tII, such as an electromagnet, and is provided so as to collide with the arm rod lI2, thereby forming a fixed side positioning stopper S'.

Therefore, first, the two objects to be welded are aligned, and the difference in pulse generation cycles of the two rotational position detectors 2g and 21- from when the brake 33 is applied until the main shaft/3 stops is determined in advance. Then, the fixed side positioning stopper S' is positioned accordingly. Then, the machine was operated and both objects A were welded.

When B becomes heat weldable and the heavy position clutch/B is disengaged and the brake 33 is applied by command, the drive shaft 3 and main shaft 13
A phase difference occurs. Naturally, therefore, there is a difference in the pulse generation cycle between the drive shaft rotational position detector 2g and the main shaft rotational position detector 2a.

(The latter pulse decreases with respect to the former pulse.) Then, the difference in the pulse generation cycle is detected and the stopper actuating device t≠ is activated by detecting the protruding position of the operating rod 3, and the fixed side positioning stopper protrudes and the main shaft side positioning stopper is activated. Collision with S and forcibly mechanically stop the spindle/3 at the set position.

Embodiment 3 In Fig. 7, an arm rod t2 is protruded from the main shaft /3, and constitutes a positioning stopper S on the main shaft side.
On the side, there is a stopper actuating device such as a fluid pressure cylinder.
+ causes the operating rod IA3 to protrude and operate, and the arm rod lI2
A variable-position fixed-side positioning stopper S' is provided. As shown in the figure, there is a single position latch/latch from the control device 21 to which output signals from the rotational position detector 2 and the axial self-transfer position detector ≠O are input, respectively.

The control circuit is configured such that an operating signal is output to the stopper actuating device ++ via the brake 33 and the stopper actuating device≠3. However, first, both objects A,
B are butted against each other, mechanically aligned with each other, and the electrical reference zero point of the rotational position detector 2g is set at that position. Then, the time point at which the stopper operation command is issued is determined in advance. That is, the number of pulses from the electrical reference zero point (brake operation command) on the rotational position detector 2 until the main shaft/3 stops and the variation thereof are ascertained. Then, the stopper activation command is issued before the number of pulses with the least variation. Therefore, both objects to be welded A.

When B is in a state where heat welding is possible due to rotational contact and the rotational position detection signal is at the zero point, heavy position clutch/B and brake 33
Issue a movement command to activate it. And at the same time the zero point (
In order to count the number of pulses from the brake command (brake command) and operate the control device t/yosist lever actuating device≠≠,
Input the operation command at the command point of the stopper operating device ≠ 5 (before the preset number of pulses with the least variation). Therefore, the stopper operating device ttS works,
A part of the stopper of the operating rod '13 collides with the positioning stopper S on the spindle side to stop the spindle/3 at the set position.

(Effects of the Invention) As described above, the present invention is characterized by the phase difference between the drive shaft and the main shaft or the rotation of the main shaft, which occurs when both objects to be welded can be heated and welded, and the unit chamber clutch is disengaged and the brake is applied in response to a command. The angle is detected mechanically or electrically, and the spindle is forcibly stopped mechanically using positioning stoppers on both the spindle side and the fixed side at a set position within the rotation angle from when the predetermined brake is applied until the spindle stops. Therefore, first, the two objects to be welded are mechanically aligned with each other.
If you understand the rotation angle from the rotation position detection signal zero point (brake command) to the stop of the spindle and its dispersion, and set the stopper operation command point within the rotation angle in advance, it is possible to Even if there are variations in the rotation angle (or time) between applying the brake on the rotation side and stopping it due to reasons such as this, it can always be stopped accurately and reliably in the same position, and true constant phase friction welding is possible. It has a immersion effect that can be performed stably.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1 is a longitudinal sectional front view of the device of the embodiment. The figure is an enlarged front view of a part of the positioning stopper on the spindle side, Fig. 3A. Figures 1 and 2 are explanatory diagrams showing the operating process of the two positioning stoppers, Figure 1 is the control circuit diagram, and Figure S is the rotation angle from the rotational position detection zero point to the spindle stop and the stopper command point. In the explanatory drawings, FIG. 3 is a longitudinal sectional front view of the apparatus of the second embodiment, FIG. 7 is a longitudinal sectional front view of the apparatus of the third embodiment, and FIG. r is a control circuit diagram thereof. 700 machines, 21. Main bearing stand, 30. Drive shaft, ≠0. Pulling wheel! 9. Main motor, Otsu0. Belt, 71. Drive hub, 1. Clutch, two. Pulley, 109. Motor with reducer, //1. Pulley with clutch, /26. belt, /3
1. Main axis, /3a. , through hole, /3b, - blind hole, /g1. Gear, 151. Armature, / Otsu 4. Single position clutch, /79. Sensor, 7g1. Gear with cam, /za4. .

Claims (1)

[Claims] A main shaft side positioning stopper is provided on the main shaft with a brake, which is connected to the drive shaft by a single-position clutch, and a fixed side positioning stopper with a variable position is provided on the main bearing pedestal side. If possible, the phase difference between the drive shaft and the main shaft or the rotation angle of the main shaft, which occurs when the single-position clutch is disengaged and the brake is applied, is mechanically or electrically detected, and the pre-ascertained brake is applied. A constant phase friction welding method, characterized in that the main shaft is forcibly stopped mechanically by both positioning stoppers at a set position within a rotation angle from 1 to 2, until the main shaft stops.