JPH04158979A - Device for joining hollow shaft member to end member - Google Patents

Abstract

PURPOSE:To continuously carry out press fitting and welding at the same place by making a first clamping device to hold the end member rotatable, making a second clamp movable in the axial direction and rotating the hollow shaft member to perform welding. CONSTITUTION:The end member Wb is held by the first and second clamping devices 10 and 20 and a pipe Wa is held by guide rollers 43. The second clamping device is advanced by a cylinder 22d and the end member Wb is engaged and press fitted in the pipe Wa. A pressurizing base 23 of the second clamping device 20 is elevated and made in an unclamped state and the second clamp is retreated by the cylinder 22d. The pipe Wa is held by guide rollers 45. A torch 83 of a welding machine 80 is brought close to the peripheral surface and a seam is welded the moment a clamp part 11 is rotated. Press fitting and welding are continuously carried out at the same place and productivity is improved and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joining process in which a shaft portion of an end member is press-fitted into both ends of a hollow shaft member, and a joint between the two members integrated by this press-fitting is welded. Regarding equipment.

(Prior Art) For example, as shown in FIG. 14, among automobile parts, there is a joint P having a ring-shaped large end portion Pb at both ends of a hollow shaft portion Pa. Conventionally, in order to manufacture the S6 joint P, the first
As shown in FIGS. 5 and 16, a hollow shaft member (pipe) Wa and two ring-shaped end members wb each having a small diameter shaft portion Wbs protruding from the side surface of a main body portion Wb2 having a shaft hole Wb are assembled in advance. These members are first subjected to a press-fitting device shown in FIG. 15 to press-fit the small-diameter shaft portion Wb3 of the end member Wb into both ends of the pipe Wa, and then the semi-finished product We integrated by the press-fitting is The welding device shown in the figure was used to weld the entire circumference of the seam Wd between both members.

The press-fitting device (FIG. 15) includes a first clamp device 1 fixed in position that grips one end member ivb, and a first clamp device 1 that is movable forward and backward with respect to the first clamp device 1 and that grips one end member ivb and the other end member wb. a second clamping device 2 for gripping the
a support guide means having two guide roller pairs 3.3 that grip the pipe Wa movably in the axial direction;
The clamping device 1.2 is attached to the clamping member wb,
A positioning guide 4.4 is provided for positioning in the horizontal direction so that the axes of the shaft portions Wba coincide with each other.

Each clamp device 1, 2 has a shaft hole Wb of each end member wb.
1 and a pressure table 6 having a guide pin 6a fitted into the positioning pin 5a, and the pressure table 6 is driven up and down by a driving means (path shown). It has become so. - On the other hand, the welding device (FIG. 16) includes a clamp device 7 which has the same structure as the first clamp device 1 and which rotates around a pivot axis C, and a clamp device 7 that rotates around a semi-finished product Wc after press-fitting. It is equipped with a support guide means having a pair of guide rollers 8 which are rotatably gripped in the circumferential direction, and a welding machine having a pair of torches 9 for welding the seam Wd of the semi-finished product We. Each pair of guide rollers 3 and 8 is provided such that the roller located above it can approach and separate from the roller located below it.

In the press-fitting device described above, first, the end member wb is placed on the fixed base 5 constituting the first and second clamp devices 1 and 2, and then the corresponding movable base 6 is moved down and the end member wb is placed between the two. While gripping the member wb, the pipe Wa is also gripped by the pair of guide rollers 3 constituting the support guide means, and the second clamping device 2 is advanced toward the first clamping device 1. Then, the end member wb gripped by the second clamp device 2 engages with one end of the pipe Wa, and the pipe Wa is pushed by the end member wb and moves toward the first clamp device 1, and finally the other The end engages with the end member wb held by the first clamp device 1 and becomes a moving end, and the two end members wb are press-fitted into both ends of the pipe Wa.

After this normalization is completed, the first and second clamp devices 1 and 2 and the pair of guide rollers 3 are put into an unclamped state, and the semi-finished product W
c is removed from the press-fitting device and carried into the welding device.

In the welding device, first, the end member wb of the semi-finished product We is gripped by the operation of the clamp device 7, and the pipe Wa of the semi-finished product Wc is gripped by the operation of the pair of guide rollers 8, and then the clamp device 7 is gripped by the operation of the drive means. The pivot axis C
Swirl around. This rotation of the clamp device 7 causes the semi-finished product We to rotate around the axis, and if the torch 9 of the welding machine is brought close to the circumferential surface of the semi-finished product in accordance with this rotation, the seam Wd of the semi-finished product Wc is formed over the entire circumference. Becomes welded.

(Problem to be solved by the invention) That is, conventionally, a hollow shaft portion Pa as shown in FIG.
In order to obtain a joint P having a ring-shaped large end portion pb at both ends, it is necessary to go through two steps: press-fitting and welding.
Not only is it inevitable to increase equipment costs and increase installation space due to double investment in similar equipment, but it also requires a large amount of man-hours to set workpieces within each process and transport them between processes, leading to decreased productivity and increased production. Cost increases were unavoidable, and a fundamental solution was desired.

The present invention was made in response to the above-mentioned conventional demands, and its purpose is to make it possible to perform press-fitting and welding in one process, thereby greatly contributing to the reduction of equipment costs and production costs. Moreover, it is an object of the present invention to provide a joining device for a hollow shaft member and an end member, which greatly contributes to improving productivity and reducing installation space.

(Means for Solving the Problems) The present invention provides means for achieving the above object, including: a first clamp device that grips one end member and rotates around a pivot axis; a second clamp device that is arranged to be movable forward and backward relative to the other end member and grips the other end member; a positioning guide for positioning to coincide with the pivot axis, and a guide release means for releasing the positioning guide from the gripping position of the end member by the clamp device at least on the second clamp device;
Between the two clamp devices, there is provided a first support guide means for supporting the hollow shaft member so that the hollow shaft member is movable in the axial direction and that the axis thereof coincides with the pivot axis, and a first support guide means that supports the two front hollow shaft members in the circumferential direction. a second support guide means rotatably supported so that its axis coincides with the pivot axis, and the first and second support guide means are mutually disposed in a plane perpendicular to the pivot axis. The guide rollers each have a pair of guide rollers that approach and separate from each other to engage and disengage from the circumferential surface of the hollow shaft member,
Furthermore, a welding machine having two torches movable in a direction perpendicular to the pivot axis is disposed between the two clamp devices.

(Function) In the hollow shaft member and end member joining device configured as described above, each end member is gripped by the first and second clamp devices, and the hollow shaft member is guided by the first supporting and guiding means. The second clamping device is supported by a pair of rollers, and the second clamping device is connected to the first clamping device.
When the hollow shaft member is moved toward the clamp device side, the shaft portions of each end member are press-fitted into both ends of the hollow shaft member at the moving end of the hollow shaft member. At this time, by moving the pair of guide rollers of the second support guide means in a direction away from each other, the guide members do not become an obstacle to the movement of the hollow shaft member.

After completing these three steps, the second clamping device is unclamped, the positioning guide attached to it is released from the gripping position, and the second clamping device is moved back.
Furthermore, if the pair of guide rollers of the first support and guide means is released and the semi-finished product is transferred to the pair of guide rollers of the second support and guide means, the first clamp device becomes in a state where it can be rotated. By rotating the clamp device, the semi-finished product rotates smoothly without interfering with the pair of guide rollers of the first support and guide means, making it possible to weld the seam with the torch of the welding machine.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

1 to 4 show the overall structure of a bonding apparatus according to this embodiment. In the following figures, the same parts as those shown in Figs. 15 and 16 are given the same reference numerals. In Figs. 1 to 4, 10 is an end member Wb.
The first clamp device 20 is arranged so as to be movable forward and backward relative to the first clamp device IO, and is a second clamp device that grips the other end member wb. The first clamping device 10 is roughly composed of a clamping part 11 and a turning drive part 12 that turns this clamping part 11 around a turning axis C (FIG. 1). 21 and a linear drive section 22 that linearly moves this clamp section 21.

The swing drive unit 12 includes a rotating shaft 12a with the clamp 11 attached to the tip, a motor 12b as a drive source, and a power transmission mechanism 12c that transmits the rotation of the motor 12b to the rotating shaft 12a. Erected support frame b
is supported in bulk. In addition, the linear drive unit 22 is capable of linear movement between a support frame 22b having a support plate 22a on the front surface to which the clamp unit 2 is attached, and a pedestal C that has this support frame 22b installed at an appropriate height above the base a. It includes an attached guide portion 22C and a cylinder 22d that drives the support frame 22b.

Each of the first and second clamp devices 10.20 is provided with a positioning guide 30.31 for horizontally positioning each end member wb (FIG. 1). Each positioning guide 30.31 is provided in a pair in a direction perpendicular to the paper surface,
Each end member w is restrained from both the left and right sides.
The axes of the shaft portions W b 3 of b are positioned so that they mutually coincide with the pivot axis C. Among these positioning guides,
While the positioning guide 30 on the first clamp device 10 side is fixedly disposed, the second clamp device 20
The side positioning guide 31 is supported by a guide release device 32 (FIG. 2) and is configured to be able to move up and down between a position where it grips the end member wb and a position where it escapes from the gripping position.

Between the first and second clamp devices 10.20, there is a first support guide device 40 that supports the vibrator Wa movably in the axial direction and whose axis coincides with the pivot axis C, and a pipe Wa. A second support and guide device 41 is disposed to support the rotor so as to be rotatable in the circumferential direction so that its axis coincides with the pivot axis C. The first support and guide device 40 has two guide roller pairs 43 rotatably attached to a shaft 42 extending perpendicular to the rotation axis C, and the second support and guide device 41 is parallel to the rotation axis C. Each of the rollers includes a pair of guide rollers 45 rotatably attached to a shaft 44 extending from the
Each guide roller pair 42, 44 is provided so that its upper and lower rollers can approach and separate from each other.

Further, between the first and second clamp devices 20, a workpiece receiving device 60 is disposed below each of the support and guide devices 40 and 41, and
．． A welding machine 80 is disposed above 41.

The work receiving device 60 receives semi-finished products (Wc) after welding, which will be described later.
A pair of receiving members 61 and 61 are provided at a predetermined interval and are movable up and down and swingable.

On the other hand, the welding machine 80 includes an elevating frame 82 that is driven up and down by a cylinder 81, two torches 83 attached to this elevating frame 82 at a predetermined interval, and
3 approaches a predetermined position relative to the semi-finished product, and is supported by a support d erected on a base a (FIG. 4). Note that the second clamp device 20, the first and second support and guide devices 40, 41, and the workpiece receiving device 60 are placed on the pedestal C all at once. Furthermore, a floor e is secured on the side of the base a to provide a work space for the worker M (FIG. 4).

In this S, the clamp part 11 of the first clamp device 10 is
As shown in FIGS. 1 and 5.6, it is equipped with a fixed base 13 having a positioning pin 13a protruding from its upper end, and a movable base 14 having a guide pin 14a capable of fitting into the positioning pin 13a at its lower end. There is.

The fixed base 13 is supported by a fixed block 15 fixed to the rotating shaft 12a of the rotation drive unit 12, and the one-way movable base 14 is supported by a movable frame 16 disposed above the fixed block 15. The movable frame 16 suspends and holds a pair of guide rods 17 that extend downward through the fixed block 15, and is connected to a cylinder 18 attached to a bracket 15a protruding from the side of the fixed block 15. The movable frame 16 moves up and down using the guide rod 17 as a guide by the operation of the cylinder 18, and the movable frame 16 moves up and down accordingly.
4 engages with and disengages from the fixed base 13. Therefore, the positioning guide 30 is connected to the positioning bin 1 of the fixed base 13.
3a and are fixed to fixed blocks 15 (FIG. 6). A stepped portion 30 is provided on the inner surface of the positioning guide 30.
a is formed, and a positioning bin 13a of the fixed base 13 is formed.
The end member Wb fitted therein is seated on this stepped portion 30a. When the movable base 14 is lowered, the guide bin 14a is moved to the positioning bin 13 of the fixed base 13.
When fitted into the end member wb, both pins 13a, 1
4a from the inner diameter, and at the same time, from the left and right directions by the positioning guide 30, so that it can be positioned appropriately in the vertical and horizontal directions. Note that this clamp portion 11 has an end member w on the fixed base I3.
A sensor 19 is provided to detect the presence or absence of b. Further, as shown in FIG. 6, the rotating shaft 12a of the swing drive unit 12 is rotatably supported within the housing 12d via a bearing 12e.

Further, the second clamping device 20 is shown in FIGS. 1.2 and 7.
As shown in FIGS. 9 to 9, a fixed base 23 having a recessed hole 23a on the upper surface and a movable base 24 having a positioning pin 24a at the lower end that can be fitted into the recessed hole 23a are provided. Fixed stand 23
is supported by a fixed block 25 fixed to the front support plate 22a of the linear drive unit 22, while the movable table 24 is supported by an elevating frame 26 which is attached to the support plate 22a so as to be movable up and down. The elevating frame 26 is supported by a cylinder 28 attached to a bracket 27 protruding from the upper part of the support plate 22a (FIG. 2), and as the elevating frame 26 moves up and down by the operation of the cylinder 28, the movable base 24 moves up and down from the fixed base 23. It is disengaged from the The end member wb is placed on the fixed base 23, and the positioning bin 24 is moved by lowering the movable base 24.
By fitting into the recessed hole 23a on the fixing base 23, the positioning pin 24a becomes restrained from the inner diameter.

The positioning guide 31 on the second clamp device 20 side is supported on an elevating frame 33 that is attached to the support plate 22a so as to be movable up and down. This elevating frame 33 is connected to the upper end of an output shaft 34a of a cylinder 34 fixed to a frame C. The elevating frame 33 and the cylinder 34 constitute the guide release device 31, and the positioning guide, the guide 31
is positioned at the side portion (grasping position) of the end member wb held by the clamp part 21 in a state where the lifting frame 33 is positioned at the rising end by the operation of the cylinder 34, while at the lowering end of the lifting frame 33. It is now positioned at a position where it escapes from the gripping position. Note that, as shown in FIG. 9, this positioning guide 31 has an inner surface formed in a curved shape following the peripheral surface shape of the main body portion W B 2 of the end member Wb.
b is restrained from the left and right directions and is accurately positioned in the horizontal direction. In addition, the clamp part 21 has a fixing base 23.
A sensor 29 that detects the presence or absence of the end member wb on the top
is provided.

On the other hand, the first and second support guide devices 40.41
It is constructed as shown in the figure and FIG. 11.

The first and second support and guide devices 40, 41 are composed of the same equalizing mechanism, and will be described here with reference to FIG. 10, which shows the first support and guide device 40. This first
The support and guide device 40 includes a pair of upper and lower swing arms 46 and 47 to which a pair of guide rollers 43 are attached. The pair of swing arms 46 and 47 are rotatably attached to a pair of left and right support plates 48 (one is omitted) provided upright on the pedestal C using a common shaft 48. 49 is a cylinder whose output shaft 4
The base of an upper swinging arm 46 is pivotally attached to the tip of 9a using a shaft 5o, and the base of a lower swinging arm 47 is pivoted to the main body portion 49b using a shaft 51. Further, both the upper swinging arm 46 and the support plate 48 have first stoppers 52 and 53 that are engaged when the pipe Wa is gripped by the guide roller pair 43, and first stoppers 52 and 53 that are engaged when the pipe Wa is gripped by the guide roller pair 43. A second stop 54,55 is provided which engages upon release, while the lower swing arm 4
7 and the support plate 48 are provided with a third stopper 56 that is engaged when the pipe Wa is gripped by the guide roller pair 43.
．． 57 are provided.

In the first support and guide device 40, when the cylinder 49 moves to the extension side, the upper swing arm 4 is moved so that its first stopper 52 is connected to the first stopper 5 of the support plate 48.
3, swings counterclockwise around the shaft 48 until it engages with the
On the other hand, the lower swing arm 47 has its third stopper 56
The pipe Wa is also swung clockwise about the shaft 48 until it engages with the third stopper 57 of the support plate 48, and as a result, the pipe Wa is held in a predetermined position by the pair of guide rollers 43 as shown by the solid line. Become so. When the cylinder 49 is moved to the contraction side from this invitation state, the upper swinging arm 46 first moves until its second stopper 54 engages with the second stopper 55 of the support plate 48, as shown by the broken line. It swings clockwise, and then the position of the upper swing arm 46 is fixed, so that the lower swing arm 47 separates its third stopper 56 from the third stopper 57 on the other side. It swings counterclockwise, and as a result, the pipe Wa is released from the grip by the pair of guide rollers 43.

Further, the workpiece receiving device 60 includes a movable plate 62 that supports each receiving member 61, as shown in detail in FIGS. 12 and 13. This movable plate 62 has its lower central portion pivoted to a support 64 extending upward from a support plate 63 using a shaft 65, and the support plate 63 is fixed to an output shaft 66a of a cylinder 66 provided on a pedestal C. ing. Support plate 6
A pair of guide rods 67 are provided on the bottom surface of 3 to allow the mount C to pass through.
is held hanging down, and the support plate 63 can be driven in any vertical direction by the operation of a cylinder 66.

One end of the movable plate 62 has one end of a rod 68 that passes through the frame C and extends vertically.
They are connected by 9. A stopper 70 is attached to the other end of the rod 68 that projects downward from the pedestal C, so that the support plate 6 can be moved by the operation of the cylinder 66.
3 moves upward, the movable plate 61 initially moves upward in a horizontal state, but after the stopper 70 comes into contact with the pedestal C, the pin 69 swings to support the support member 61. is in an inclined state as shown by the broken line in FIG. The receiving member 61 is initially positioned slightly below the semi-finished product Wc supported by the support and guide device 40i4]1, and if the semi-finished product Wc is released from the grip of the support and guide device, the above-mentioned rise will occur. In the meantime, the semi-finished product We is delivered to this receiving member 61, and then slides down due to the subsequent inclination of the receiving member 61. Note that a pedestal 71 with an open top is provided on the pedestal C so as to be connected to the slanted receiving member 61, and the semi-finished product Wc that has slid down on the receiving member 61 is stored in this pedestal 71. will be done. Further, the pair of receiving members 61 are connected by a connecting bar 72.

Hereinafter, the operation of the bonding device configured as described above will be explained.

Fixing base I3.2 of the first and second clamping devices 10.20
After placing the end member wb on the corresponding movable base 1
4.24 is moved down to grip the end member wb between them, and the pipe Wa is gripped by the two guide roller pairs 43 and 43 that constitute the first support and guide device, and then,
The second clamp device 20 is advanced toward the first clamp device 10 by actuation of the cylinder 22d. Then,
The end member wb held by the second clamp device 20 engages with one end of the pipe Wa, and the pipe Wa is pushed by the end member wb and moves toward the first clamp device 10,
Finally, the other end engages with the end member wb held by the first clamp device 10 and becomes a moving end, and the two end members wb are press-fitted into both ends of the pipe Wa. At this time, the cylinder 49 of the second support guide device 41 is operated to the contraction side to move the pair of guide rollers 45 in a direction away from each other (thereby, the pipe Wa is not obstructed by the pair of guide rollers 45). kotonana (able to move smoothly)

After the press-fitting is completed, the pressure table 23 of the second clamp device 20
is raised to an unclamped state, and the positioning guide 31 attached thereto is released from the gripping position by actuation of the cylinder 34 of the guide release device 32, and the second clamp device 20 is moved back by reactivation of the cylinder 22d. . Next, the pair of guide rollers 43 of the first support guide device 40 are moved in a direction in which they are separated from each other, and at the same time the pair of guide rollers 43 of the first support guide device 40 are
When the pair of guide rollers 45 constituting the support and guide device 41 are moved toward each other by the extension side operation of the cylinder 49, the semi-finished product Wc is gripped by the pair of guide rollers 45. Then, in this state, when the mower 12b of the rotation drive section 12 of the first clamp device 10 is operated to rotate the clamp section 11 around the rotation axis C,
The semi-finished product Wc rotates in the circumferential direction guided by a pair of guide rollers 45.

At the same time, the cylinder 81 of the welding machine 80 is actuated to bring its torch 83 close to the peripheral surface of the semi-finished product We, and by supplying welding current thereto, the seam of the semi-finished product Wc is welded all around. At this time, the guide roller pair 43 constituting the first support guide device 40 escapes from the semi-finished product We, so the semi-finished product Wc rotates smoothly, and the seam can be welded with high precision by the torch 83 of welding 8I80. I can do it.

After the above is completed, the pair of guide rollers 45 of the second support and guide device 41 are moved backward to release the semi-finished product Wc from gripping, and the receiving member 61 of the workpiece receiving device 60 is further raised by the operation of the cylinder 66. Then, the semi-finished product Wc is delivered to the receiving member 61, and then slides down into the pedestal 71 due to the subsequent inclination of the receiving member 61, thereby completing the series of press-fitting and welding steps. In this embodiment, in particular, since the first and second support and guide devices 40.41 are configured with an equalizing mechanism, the rigidity of the member grip by the pair of guide rollers 43.45 is increased, and press-fitting and welding operations can be performed stably. Not only is this possible, but it is also compact as a whole, allowing multiple installations in a narrow area.

(Effects of the Invention) As described above in detail, according to the device for joining a hollow shaft member and an end member according to the present invention, press-fitting and welding can be performed continuously at the same location. In addition to being able to improve productivity and reduce production costs,
By consolidating equipment, it is possible to reduce equipment costs and installation space.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the main structure of a device for joining hollow shaft members and end members according to the present invention, Fig. 2 is a front view showing the overall structure of the welding device, and Fig. 3 is a similar plan view. FIG. 4 is a similar side view, FIG. 5 is a front view showing a first clamping device that is a part of the present invention, and FIG. 6 is a side view similarly showing the first clamping device partially in section. , FIG. 7 is a front view of a second clamping device that is part of the present invention, FIG. 8 is a side view of the second clamping device, and FIG. 9 is a plan view of the second clamping device. 10 and 11 are side views showing the first and second support and guide devices that are part of the present invention;
Figure 2 is a side view showing a work receiving device that is part of the present invention;
Fig. 13 is a front view of the work receiving device, Fig. 14 is a perspective view showing the shape of parts to be welded according to the present invention, Fig. 15 is a schematic diagram showing a conventional press-fitting device, and Fig. 16 is a conventional welding device. It is a schematic diagram showing an apparatus. IO...first clamp device, 11.21...clamp section 12...swivel drive section, 20...second clamp device 22...linear drive section, 30.31...
・Positioning guide 32...Guide release device, 40...
・First support and guide device 41...Second support and guide device 43, 45...Guide roller pair, 60...Work receiving device 61...Receiving member, 80...Welding machine, &3.・
・Torch Wa...Hollow shaft member, wb...End member Wb 3...Shaft portion, Wc...Semi-finished product Patent applicant Toyota Motor Corporation Fig. 4 Fig. 5 Fig. 6 Fig. 12 Fang 10 Fig. Fang 14 Fig. 16

Claims (1)

[Claims] (1) A joining device for press-fitting the shaft portion of an end member into both ends of a hollow shaft member and welding the seam of the two members integrated by this press-fitting, the apparatus comprising: gripping one end member and rotating the end member; A first clamp device that rotates around an axis and a second clamp device that is arranged to be movable forward and backward with respect to the first clamp device and grips the other end member, the first clamp device and the second clamp device A positioning guide is attached to each of the clamp devices for positioning each end member so that the axes of the shaft portions thereof mutually coincide with the rotation axis, and the positioning guide is attached to at least the second clamp device. A guide release means for releasing the end member from the grasping position of the device is provided, and the hollow shaft member is supported between the two clamp devices so as to be movable in the axial direction and the axis thereof coincides with the pivot axis. and a second support and guide means that supports the hollow shaft member so that the hollow shaft member is rotatable in a circumferential direction and whose axis coincides with the pivot axis, The second supporting guide means each has a pair of guide rollers that approach and separate from each other in a plane perpendicular to the pivot shaft and engage and disengage from the circumferential surface of the hollow shaft member, and A welding device for joining a hollow shaft member and an end member, characterized in that a welding machine having two torches movable in a direction orthogonal to the clamping device is disposed between the two clamping devices.