JPS5877788A - Method and device for frictional press welding - Google Patents

Abstract

PURPOSE:To join two pieces of metallic blank materials with a specified phase in the stage of subjecting both materials to joining under press welding with the frictional heat evolved by contacting and rotating both materials detecting a press weldable state, and coupling a phase correcting device to a revolving shaft at the same instant of press welding of the blank materials. CONSTITUTION:Two pieces of metallic blank materials 5, 9 are gripped with chucks 4, 8, and a spindle 3 fixed with the material 5 is revolved at a high speed of 1,500rpm with a motor 15; at the same time, a table 7 connected to the chuck 8 is slid leftward to bring the material 9 into contact with the rotating material 5. When the contact surfaces of both materials 5, 9 attain the temp. at which both materials are weldable by friction heat, the time is detected with a timer or the like, and the rotating speed of the spindle 3 is decelerated quickly down to 300rpm. At the same time, the hydraulic pressure of a hydraulic cylinder 25 is released and a clutch 19 is engaged with the clutch 17 of the spindle 13 by means of a clutch lever 24 to couple a device for correcting phases including the clutch 19, a gear 22 and a rack 23 to the spindle 3 in the set phase, whereby both materials 5, 9 are corrected of phases with high accuracy and are joined by press welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for rotating two independent welded objects or materials (hereinafter referred to as materials) at a certain relative rotational speed while bringing them into contact with each other under a certain pressure. Piezoelectric welding is performed using generated frictional heat, and it particularly relates to the friction welding method and its Q# in which image materials are joined at predetermined phase-related positions.

Friction welding can be used in a wide range of applications if it is possible to join two materials that have been processed in shape, size, etc. with sufficient strength under a certain mutual phase. . Therefore, although some prior art techniques are known regarding this phase correction means, they are methods that tend to cause variations in phase accuracy and dimensional accuracy, or methods that are sensitive to bonding strength, or methods that are not suitable for phase correction. Friend in a way that involves a huge impact in the final stage of rounding.

As a friction welding method (Japanese Unexamined Patent Publication No. 53-758198) that solves the above-mentioned 81 problems, when friction welding two materials at a predetermined phase relationship position, the phase □1t64
After completing the preparatory stage for sand phase correction by connecting the cylinder device for phase correction and the main shaft to a specific phase via a clutch device when the cable is set at 4°, the speed is fixed, and the travel distance is reached. It has been proposed that the cylinder device is rapidly decelerated by applying resistance while the rotational input to the spindle system continues, and that the cylinder device is stopped at the operating end, thereby aligning the phase of the image material. . Therefore, when using this method, in order to perform phase alignment accurately, it is necessary to ensure that the P9 radar device for phase correction reaches a working distance of 1 m, and in order to improve the dimensional accuracy of the overall length, it is necessary to Rotation speed during correction should be at least 300 rpm
It is necessary to set the rotation speed to a relatively high speed.

However, when using this method, the load line given to the rotational input (driving force) of the main shaft when correcting the phase, and the predetermined load line given by limiting the amount of oil discharged from the V linder device for rapid deceleration of the main shaft. The rotational resistance (frictional torque) that is actually generated on the joint surface of the image material is added, and this rotational resistance is not always constant, depending on the material size of the tsumamen material, etc. Since it is a variable, the state that changes with each pressure welding II
Overcome the resistance and move the S/9 device to the operating end.
ll! To achieve Kll, that is, to realize reliable phase alignment, it is necessary to prepare a large-capacity K for driving the main shaft. However, the large output mo! When using a cylinder, the impact at the working end of the cylinder device is inevitably a large fist, and the impact can damage the drive system and gears from the motor to the V cylinder device. , when the rigidity is improved to protect them, the inertia of the drive system increases,
This results in an even greater impact when the cylinder device reaches its working end.On the other hand, in order to reduce this impact, the rotational speed at the time of phase correction is low, for example 100~
If it is set to about 12 Orpm, the pressure welding strength and dimensional accuracy will decrease.

The present invention has been made for the purpose of eliminating the above-mentioned drawbacks of the conventional running material, and it is possible to rotate one material without cutting off the rotational input from the main drive system to the material rotating at low speed relative to the other material. When the rotational system is brought to a rapid stop by adding resistance to the system, the phase of the image material is changed by providing a drive system separate from the main drive system and applying power to the rotational system to assist its rotation. It is an object of the present invention to provide a friction welding method and device that enables alignment to be performed reliably and quickly, as well as to reduce the impact on the main drive system by dispersing the impact generated during phase alignment of image materials to the front drive system. It is something to do.

Hereinafter, illustrated embodiments embodying the present invention will be described in detail. 1st i! As shown in IK, a bearing 2a is attached to the cylindrical body 1.

2b, 2c, and is supported concentrically with the main shaft 3 through a chuck 4. One of the materials 5 is rotatably supported on the main shaft 3 via the chuck 4, and the material 5 is mounted on the main shaft 5 on a sliding table 6 integrated with the housing 1. Axial direction KmJIE! It is brought into frictional contact with the other material 9 supported by the chuck 8 via the flexible table 7.

For this purpose, the table 7 can be brought close to, separated from, and pressurized by the hydraulic system 10 with respect to the main shaft 3. The main shaft 3 is a pulley 11° belt 12. Boo! A zero-value conversion type AC motor 15 that is rotationally driven by a micro-fine conversion type AC motor 15 (Original llJ machine) via the J13 and the electromagnetic clutch 14.
The rotation speed is changed by changing the number of poles. In this example, the high speed rotation speed given to the main shaft 3 is 1800 rpm for frictional heat generation, and the low speed rotation speed given to the main shaft 3 for phase correction is 300 rl. ) II, and the rapid deceleration of the rotation system from a high speed of 180 rpm to a low speed of 3001"p is performed using the motor's own regenerative braking at the time of minute rotation. It is also possible to use a DC motor as the motor.

A cam clutch 17 having an integral pawl 16 is provided on the opposite side of the main shaft 5 from the chuck 4.
A cam clutch 19 having a shaft 20 is slidably supported by a key 21.

The shaft 20 is concentric with the main shaft 3 and supported by the main shaft 3 and the sieve body 1 so as to be relatively rotatable. A gear 22 integral with the clutch 19 meshes with a footer 23 perpendicular to the shaft 20 through respective teeth 22&, 25&I/C. In addition, when the clutch 19 is slid to the right of wI, 1 by a clutch sliding lever 24 which is pivotally supported on the housing 1 via a pin 24, the claws 18 and 16 are brought into engagement, and the clutch 17 The engagement is performed, and the engagement is released when it is slid to the left.

As shown in Fig. 3, the clutch slide @ V par 24 is
b is always pulled to the right in the figure by a yoke 27 integrated with the piston 26 of the hydraulic cylinder 25 against the tension of the spring 28, and therefore the clutch 17 is always pulled.
and 19 are maintained in a separated state, but when the pressure oil on the rod side of the piston 26 is released (necessarily connecting the rod side chamber to the tank), the tension of the spring 28 causes the clutches 17 and 19 to separate. The two sides can be engaged.

On the other hand, as shown in FIG. 2, one end of the tank 23 is connected to a hydraulic V cylinder 29 (in this embodiment, two cylinders are installed in parallel at the footer) for adding resistance to the rotation of the main shaft 3 for phase alignment. The positioning plate 31 is connected to a positioning plate 31 fixed to a piston rod 30 (in the case shown). That is, the hydraulic Y cylinder
One of the supply ports 291 that becomes the discharge side when the piston rod 30 moves forward (moves downward in the figure) at 29 is connected to the flow control valve 52 with a check valve and the pressure control valve 3 with a check valve.
5 in parallel, and an electromagnetic switching valve 8Y1 in series with them (connected to the conduit 34 including gears 22. When the piston rod 50 moves forward through the tank 23 and the positioning plate 31, a certain back pressure is applied to the piston rod 30 by limiting the amount of discharged oil, thereby applying resistance to the rotation of the main shaft 30, and positioning the piston rod 50. A deciding plate 31 is provided in the housing 1 and is set so that when it comes into contact with a stopper 38, the material 5 together with the gear 22 and the main shaft 3 which are rotating together are stopped in the same phase with respect to the other material 9. There is.

The hydraulic Y-rinder 29 also has a piston loft 50 after engagement of the rounding clutch 17 and 19 for phase correction.
In order to apply hydraulic pressure that helps the curve of
It is configured to be press-fitted from the other supply port 29b through a conduit 56 containing the same. That is, when correcting the phase, a plate number conversion type AC motor 151 is used in the rotation system of the main shaft 3, material 5, etc.
Hydraulic pressure is added to assist the rotational input by c, and the hydraulic pressure can be adjusted if necessary. After the friction welding is completed, the piston loft 30 is returned to the specified original position by switching the electromagnetic switching valves SV1 and 8V2 to the backward side, and in the same state, the pump P is connected to the akinimulator 35.
Pressure oil is supplied via the check valve 67.

Further, a stopper 38 for determining the operating end of the hydraulic cylinder 29 is fixed to the housing 1 via a rubber-like elastic body 59, and this rubber-like elastic body 39 has a thickness of, for example, 5.
It is formed by approximately 15 soft layers of 1I11 plate-shaped urethane rubber, and a preload of, for example, 1200' is applied by tightening bolts 40.

This embodiment is constructed as described above, and its operation will be explained below. The two materials 5 and 9 are held between the chucks 4 and 8 at a preset phase, and with the electromagnetic clutch 14 in contact and in good condition, the main shaft 3 is rotated at a specified high and long rotation speed by the pole change type AC motor 15. For example, the table 7 is moved forward along the slide table 6 (slide 111 to the left in the figure) by the hydraulic device 10, and the image material 5.9 is brought into contact friction under a certain pressure. The frictional heat generation process is completed when the contact area of the image material 5.9 reaches a sufficient knitting area for welding (point A in Figure 5).
The timing is detected by a timer or the amount of filling. This detection signal causes the pole number changeable AC motor 15 to
The number of poles of the motor #15 is changed, and accordingly, the motor #15 itself is regenerated and moved, so that the main shaft 3 is rapidly decelerated until it reaches a specified low jfiE rotation number, for example, 300 rPIl (point B in FIG. 5).

Therefore, the hydraulic pressure of the hydraulic V-rinder 25 is released simultaneously or with a slight delay from the above detection signal, and the clutch sliding lever 24 is released by the spring 28 (or pressure is also applied from the positive Kff pair to the hydraulic V-rinder 4). Clutch 19 via shaft 20KG.

When the clutch 19 is slid to the right in the figure, the clutch 19 is engaged with the clutch 17 rotating together with the main shaft 3 as shown in FIG. The phases of the rack 23 (including the screw thread rod 30, etc.) and the main shaft 3 are coupled as set, and the preparation stage for phase correction is completed.

When the clutches 17 and 19 are engaged, the gear 22 rotates together with the main shaft 3, and the hook 23 moves forward together with the piston loft 30 of the hydraulic cylinder 29 (moves downward as shown in FIG. 2). In conjunction with the engagement of the clutches 17 and 19, the electromagnetic switching valve SV2 is switched to the forward side, and the pressure oil of the accumulator 35 is press-fitted into the rod side of the hydraulic cylinder 29 from the side opening 29b, causing the piston rod 5061111 to advance. The power of support is added.

That is, the main shaft 5 is rotated at a low speed by the driving force (auxiliary force) from the ultra-fine conversion type AC motor 15 or the piston rod 50 & C added to the hydraulic pressure, and in this state, the piston The rod 30 and the wotta 23 are advanced.

Due to this forward movement, the end side O pressure oil in the hydraulic cylinder 29 flows out from the supply gap 29 to the tank T via the electromagnetic switching valve 8Vl, which has been previously switched to the discharge side. Since the amount of pressure oil flowing out from the port 9& is limited to a constant value by the flow rate control valve 52 and back pressure is applied to the screw cylinder (this back pressure is controlled by the pressure control valve 35 so as not to exceed a set value). ), the piston rod F30
This acts as a resistance to the advancement of the rack 23, and as a result, resistance (braking) is added to the main shaft 3, which is driven at a constant low speed by the driving force of the pole change type AC motor 15 and the hydraulic pressure. In addition, the timing of applying the rotational force by hydraulic pressure to the main shaft 3, the main shaft! It may be done at the same time as adding the resistance to lK, or it may be delayed after adding the resistance, and is selected as appropriate.

As described above, the main shaft 3 is decelerated while receiving the driving force from the pole-changing AC motor 15 and the driving force from the hydraulic pressure, and the positioning plate 61 collides with the stopper 38 and the rubber-like elastic body Image material 5.9 at the position where 39 is elastically displaced
The relative rotational speed becomes zero and the two coincide with the preset nine same phases, and then the image material 5.9 is cooled for a certain period of time while being subjected to upset pressure, thus completing the friction welding. In this case, the impact force at the time of the collision is the rubber-like elastic body 59
It is relaxed because it has 0 elastic displacement, and it is a rubber-like elastic body! 1
9 is given a predetermined preload, so if the image material 5.9
Even if the collision force between the positioning plate 31 and the stopper member varies slightly depending on the pressure contact due to slight variations in rotational resistance at the joint surfaces of Highly accurate phase matching becomes possible.

In addition, in the above rapid stopping operation, the rotational speed of the main shaft 3 immediately before stopping takes into account the W* force at the time of stopping and is also influenced by its inertial mass, but it is preferably about 150 rpm or less, and Ultra-fine conversion formula alternating current amount for the main shaft 5 - E1
The input of 5 and the hydraulic biasing force of the Akinimure 55 are rounded to prevent the main shaft 3 from reversing due to the reaction caused by the impact at the time of stopping. It is pressed and held against the stopper 38 with a constant force. Therefore, the drive system of the ultra-fine conversion AC motor 15 and the drive system of the hydraulic V-rinder 29 are connected to the positioning plate 31.
Although the motor receives a shock as a reaction due to the collision between the motor and the stopper 38, the impact is of a magnitude commensurate with the output of each drive system and the motor. In other words, the Ai drive system receives all the impact received by the positioning plate 31 in a shared manner, and if the output of the Oka drive system is set to 1=1, the hook 23 and the gear 22
The impact acting on the piston rod 30 and the impact acting on the piston rod 30 are reduced by half compared to the impact that the positioning plate 31 receives.

In addition, in this embodiment, when the clutches 17 and 19 are engaged in the preparatory stage for phase correction, the claws 16, 18 are 4! ! Although one case is illustrated, it goes without saying that when a 180-degree symmetric material is to be pressed, there will be two claws spaced at 180-degree intervals. Further, the restriction of the amount of discharged oil for adding resistance to the advancement of the piston rod 30 does not have to be constant as in the embodiment, and may be changed as appropriate according to the movement stroke of the piston rod 50.

As described in detail above, 1 the present invention, when friction welding two materials in a predetermined phase relationship position, adjusts the phase correction device and the main shaft to a specific phase during the low-speed constant rotation process of relatively rotating image materials. After the preparatory stage for phase correction is completed, these are quickly stopped at a predetermined phase.When aligning the phase of the image material, the rotation side material and the main shaft that holds it, etc. To add a resistance to quickly stop the rotation system for phasing without cutting off the rotation input to the rotation system, and to add power to assist the rotation at the same time as the addition of the resistance or after an appropriate time. It is characterized by the fact that Therefore, according to the present invention, the rotation of the rotary system is separated from the original drive system only during phase alignment. By assisting with this, reliable phase alignment is achieved by solving the phase mismatch problem caused by insufficient driving force of the rotating system against the above resistance and the total resistance of the rotating system including the rotational resistance of the material joining surface. Moreover, since the shock generated by the rapid stop of the rotating system is generated in a round shape corresponding to the output in the drive system, the necessary output is given to the rotating system with one drive* as in the past. Compared to the case where the driving force is transmitted, the impact received by the driving force transmission member can be reduced and its protection can be improved.

In addition, the present invention uses a rubber-like elastic body to buffer the impact when the rotating system suddenly stops, but the rubber-like elastic body has a predetermined preload. In addition to the mitigation effect, it also works effectively in alleviating the impact on each drive system (even if there is a slight variation in the collision force due to variations in the total resistance of the rotating system, the amount of displacement required for buffering is small). It becomes possible to suppress the variation in the final stop mW in the phase correction device from the human to the smallest possible range.

411! il#Jo11 Simple Explanation FIG. 1 is a sectional view of a friction welding device showing an embodiment of the present invention.
21st! 5 is an explanatory diagram showing a mechanism for adding resistance and rotational assisting force to the rotation system and rapidly stopping the image materials in the same phase, FIG. Figures A, B, and C are explanatory views showing how the clutch is engaged, and Fig. 5 is an explanatory view of the operation of the present friction welding device.

1.-Housing 3-Main shaft 5.9-Material 10.-Hydraulic system 15-# Ultra-fine conversion type AC motor 22-Gear 23..Hook 29-Hydraulic V cylinder-30..Piston rod 31 −Positioning plate
32--Flow rate control valve 35-Akinimulator 38-Stopper 59--Rubber-like elastic body

Claims (1)

[Claims] 1. Holding two opposing materials at a predetermined phase,
While rotating one of the materials held on the main shaft side at a relatively high speed, the image material is brought into frictional contact under a certain pressure, and then the rotation is reduced to a low speed, and the rotation is made during the transition to a low speed or at a set low speed. After reaching 9, the fixed side that grips the other material at the working end is always in a specific phase, and the main shaft is coupled to a specific phase, and the main shaft is rotated to the phase correction device without cutting the rotational input. At the working end of the phase correcting device, the main shaft is decelerated by adding a suppressing resistance, and power is applied to the phase correcting device to assist the rotational input of the main shaft at the same time as the resistance is added or at an appropriate time. A friction welding method characterized by stopping rotation. 2 A gripping device that grips two opposing materials at a predetermined phase, a device that biases both of the gripping devices toward each other, and one gripping device that drives the J4111iL nine main shafts at high and low speeds. possible prime mover and the [111N
a clutch device that engages the main shaft at a specific phase in response to a command signal related to the low speed shift of No. 11; a cylinder device that is driven via the clutch device and restrains the stop phase of the main shaft at its operating end; A friction welding device that includes a throttle device that adds resistance to the rotation of the main shaft by the l1Jl original @ machine by limiting the amount of oil discharged from the cylinder, and a pressure device that applies hydraulic pressure to the cylinder in a direction that assists the rotation of the main shaft. . 3. A main shaft equipped with a gripping device that grips 92 facing materials in a predetermined phase, a device that biases both gripping devices toward each other in a direction toward each other, and one of the gripping devices can be driven at high and low speeds. a clutch device that engages the main shaft at a specific phase based on a command signal related to the low-speed sphericity of the driving motor, and a cylinder that is driven via the clutch device and restricts the stop phase of the main shaft at its operating end. a throttle device that adds resistance to the rotation of the main shaft by the prime mover by limiting the amount of oil discharged from the cylinder; a pressurizing device that applies hydraulic pressure to the VIIllender in a direction to assist the rotation of the main shaft; A friction welding device comprising a stopping device formed by overlapping a plurality of flat plate-shaped elastic bodies and applying a predetermined preload to the elastic bodies for stopping a cylinder device at an operating end.