JP4925426B2 - Work fixing and holding device and work welding method using the same - Google Patents

Description

  The present invention relates to a work fixing and holding device for combining and welding a plurality of work members to be torque converters used in a power transmission device for a vehicle, and a work welding method using the work fixing and holding device.

A torque converter, which is a power transmission device for a vehicle, has a rotatable turbine hub in which a plurality of turbine blades are formed radially on the inner surface of a converter cover, and a working fluid flow path is formed in the turbine hub. ing. Conventionally, in relation to such a torque converter manufacturing technique, for example, in Patent Document 1, a front cover of a torque converter and a cap provided on a front side peripheral edge of a cover center hole are integrated by press molding.
When manufacturing a torque converter by combining multiple work members, the shape of these members, the press formability and weldability of the material, and the required mechanical strength are constrained. There were cases where it was not possible to reliably and efficiently.
JP 2005-121100 A

As described in Patent Document 1, in the case of press molding, there is a problem that sufficient reliability cannot be obtained in terms of mechanical strength and the like when a working fluid is introduced into the inside and rotated at high speed.
The present invention has been made to solve the above-described problems, and provides a work fixing and holding device that is excellent in productivity and reliability when a plurality of work members are welded together to manufacture a turbine hub or the like. And it aims at providing the welding method which can manufacture a turbine hub efficiently and reliably using this.

The workpiece fixing / holding device according to claim 1 is a workpiece fixing / holding device used when the workpiece B is inserted into the shaft hole of the workpiece A and the two workpieces are welded together, and is provided above the workpiece A so as to be movable up and down. Clamp ring gripping means, a donut-shaped clamp ring that is detachably suspended by the clamp ring gripping means and presses the workpiece A from above, and the periphery of the clamp ring after pressing the workpiece A from above. And clamping ring fixing means for clamping and fixing .
The workpiece fixing and holding device according to claim 2 is a workpiece fixing and holding device used when the workpiece B is inserted into the shaft hole of the workpiece A and both the workpieces are welded and joined, and the workpiece A is rotatably mounted. A clamp ring gripping means provided so as to be movable up and down facing the turntable, a donut-shaped clamp ring that is detachably suspended by the clamp ring gripping means and presses the workpiece A from above, and a turntable The clamp ring fixing means for pressing the periphery of the clamp ring after being placed and pressing the workpiece A from above to fix the clamp ring to the turntable, and the upper portion of the workpiece B inserted into the shaft hole of the workpiece A by pressing the workpiece B And a workpiece shaft pressing means for fixing and holding the workpiece in the shaft hole of the workpiece A.
A workpiece fixing and holding device according to a third aspect of the present invention is the workpiece fixing and holding device according to the first or second aspect, wherein the workpiece is moved forward and backward to the welding position in a non-interfering state with respect to the clamp ring gripping means and the workpiece shaft pressing means for fixing the workpiece A and the workpiece B A welding apparatus for welding the contact portion between the workpiece A and the workpiece B after pressing the upper portion of the workpiece B inserted into the shaft hole of the workpiece A to fix and hold the workpiece B in the shaft hole of the workpiece A; It is further provided with a feature.

A workpiece welding method using the workpiece fixing and holding device according to the present invention is a workpiece welding method using the workpiece fixing and holding device according to claim 1, wherein the clamp ring gripping means can be moved up and down above the workpiece A. Of the clamp ring after the doughnut-shaped clamp ring is detachably suspended by the clamp ring gripping means, the workpiece A is pressed from above by the clamp ring, and the workpiece A is pressed from above by the clamp ring fixing means. The periphery is clamped from above and fixed .

According to the work fixing and holding device of the present invention, when the work B is inserted into the shaft hole of the work A and the two works are welded together, the clamp is held by the clamp ring gripping means provided above the work A so as to be movable up and down. Since the ring is suspended in a detachable manner, it is not necessary to take out the clamp ring to the outside when replacing the workpiece, and the tact time during welding can be shortened.
In addition, the work B placed in the shaft hole of the work A can be pressed and held on the turntable, and welding work can be performed along the contact portion between the work A and the work B that rotate horizontally. These workpiece members can be efficiently and reliably welded to each other, and are excellent in productivity and reliability.
Further, according to the work welding method using the work fixing and holding device of the present invention, the work A and the work B are integrated by moving back and forth to the welding position in a non-interference state with respect to the clamp ring gripping means and the work shaft pressing means. Therefore, there are few factors that are restricted by the weldability of the material and the layout of the required machinery and equipment, and it is excellent in economic efficiency and reliability.

As an embodiment of the workpiece fixing and holding device of the present invention, a turbine body (work A) formed in a substantially disk shape and a hub shaft (work B) fitted in a shaft hole formed in the center of the turbine body are welded. The welding apparatus for joining and integrating and manufacturing the turbine hub for torque converters is demonstrated.
The workpiece fixing and holding device is configured such that, when welding both workpieces, the workpiece A is rotatably placed on a turntable and is suspended by a clamp ring gripping means provided so as to be movable up and down facing the turntable. The doughnut-shaped clamp ring is pressed from above the workpiece A, and the clamp ring fixing means clamps the periphery of the clamp ring from above to fix it on the rotary table, and the workpiece shaft pressing means fits into the shaft hole of the workpiece A. The upper part of the workpiece B is pressed and the workpiece B is fixedly held in the shaft hole of the workpiece A.
Further, a clamp ring gripping means for fixing the work A and the work B and a welding device that advances and retreats to and from the welding position in a non-interfering state with respect to the work shaft pressing means, and an upper part of the work B fitted in the shaft hole of the work A The contact portion between the workpiece A and the workpiece B after the workpiece B is fixed and held in the shaft hole of the workpiece A is welded.
With such a configuration, the turbine main body and the hub shaft thereof can be integrally and efficiently welded to each other.

  The turbine hub is a member formed by welding a turbine body (work A) in which a large number of turbine blades are radially arranged on the inner wall surface thereof and a hub shaft (work B) provided in a shaft hole of the turbine body. Yes, and connected to an input shaft of a power transmission device such as a torque converter. For example, in the torque converter, a thrust bearing is provided on the front cover of the converter cover, and the thrust of the turbine hub fitted into the input shaft is supported by the thrust bearing. Thus, when the pump impeller rotates integrally with the converter housing by the rotation of the crankshaft or the like, the pump action by the pump impeller rotates the turbine runner, and the power is transmitted from the turbine hub to an automatic transmission or the like.

  The turntable is a jig for rotatably mounting and fixing a turbine main body serving as a turbine hub and a hub shaft fitted in a shaft hole thereof, and is provided at a lower portion of the work fixing and holding device. . The turntable is controlled via a driving device such as an electric motor and can rotate about a vertical axis within a predetermined angle range.

  The clamp ring is a donut-shaped metal jig that is detachably provided on the turbine body mounted on the turntable, and when the two workpieces are integrated and welded, the pressing surface is brought into close contact with the upper portion of the turbine body. It plays a role of pressing the main body from above.

  The clamp ring gripping means is provided so as to be able to move up and down while standing on the upper part facing the rotary table, and at the time of welding using a welding apparatus, a clamp ring locking portion formed on the periphery of the clamp ring is provided. The clamp ring has a function of lifting and retracting the clamp ring on the turntable. As a result, when the turbine body and the hub axle are placed on the turntable before welding, the clamp ring is lifted to the non-interference position and retracted so that both works are not obstructed to be placed on the turntable. The clamp ring that has been lifted after the two workpieces are arranged on the turntable is lowered to the upper surface of the turbine body and released, and the clamp ring placed on the turbine body is released from above by the clamp ring fixing means described later. It is in a state where it can be pressed.

  The clamp ring fixing means hooks the tip arm to the periphery of the clamp ring and clamps it downward from above during welding, and fixes the turbine body placed on the rotary table to the rotary table by the clamp ring. The clamp ring fixing means includes a cylinder, and its tip arm can be moved up and down by expansion and contraction of the cylinder.

  The work shaft pressing means was placed on the turntable by lowering its lower end toward the center hole of the clamp ring during welding after placing the turbine body and hub shaft on the turntable before welding. This is a jig for pressing and holding the upper part of the hub shaft to fix and hold the hub shaft (work B) in the shaft hole of the turbine body (work A). Move up and down.

  In the welding apparatus, the welding torch is provided so as to face a contact portion between the turbine body fixed and held on the turntable and the hub shaft, and an arc from the tip of the welding torch is generated by rotating the turntable. The turbine body and the hub axle are welded and integrated by hitting the contact portion. The welding torch as such a welding apparatus is installed so as to be able to advance and retreat to the welding position in a non-interfering state with respect to the clamp ring gripping means and the work shaft pressing means that move up and down at the upper part of the work fixing and holding apparatus.

  FIG. 1 is a front view of a work fixing and holding device according to an embodiment of the present invention, and FIG. Hereinafter, with reference to the drawings, the workpiece fixing and holding device of the present embodiment will be specifically described. 1 and 2, reference numeral 10 denotes a workpiece fixing and holding device according to an embodiment of the present invention. The work fixing and holding device 10 includes a turntable 11 for placing a turbine main body A (work A) serving as a turbine hub H and a hub shaft B (work B) disposed in a shaft hole E thereof. 11 is provided with a clamp ring gripping means 13 so that the locking portion 12a of the clamp ring 12 is locked by the hook member 13a and suspended vertically. The clamp ring 12 serves to fix the turbine body A on the turntable 11 by pressing the turbine body A from above when welding the turbine body A and the hub shaft B.

A work shaft pressing means 14 is provided on the upper portion of the rotating table 11 so as to be movable up and down. The lower end 14a of the work shaft pressing means 14 is lowered toward the central hole 12c of the clamp ring 12 by the cylinder driving portion 14b. Then, the upper part of the hub shaft B fitted in the shaft hole E of the turbine body A is pressed and fixedly held.
Further, a clamp ring fixing means 15 is disposed on the upper part of the turntable 11, and the periphery of the clamp ring 12 that presses the turbine body A (work A) placed on the turntable 11 is fixed by pressing from above. To do.

  As shown in FIG. 5, the welding torch 16 constituting the welding apparatus has its welding position so as not to interfere with the clamp ring gripping means 13 and the workpiece shaft pressing means 14 that move up and down at the upper part of the turntable 11. It is controlled so as to advance and retreat from a gap obliquely upward. Thus, the welding torch 16 is welded along the contact portion D between the turbine body A and the hub shaft B that rotate horizontally on the turntable 11.

FIG. 3A is a longitudinal sectional view showing the upper half of the turbine hub H in which the hub shaft B is integrated by welding to the shaft hole E of the turbine body A. FIG. As shown in FIG. 3 (b), the hub shaft B was fitted into a shaft hole E in which the center portion of a bowl-shaped turbine main body A in which the turbine blades C were formed radially on the inner wall of the hub shaft B was hollowed out. Thereafter, the upper half of the turbine hub H is manufactured by integrally welding the contact portion T between the turbine body A and the hub shaft B.
In addition, the turbine hub H is made into a finished product by superimposing the turbine hub H inward so that the ones in the state of FIG.

FIG. 4 is a perspective view of the clamp ring 12. As shown in the drawing, the clamp ring 12 has locking portions 12a provided upright at two positions on the peripheral edge in the upper diametrical direction, and the upper end portion of the locking portion 12a protrudes outward in the radial direction so that the protruding portion 12b. Is forming. The clamp ring 12 can be suspended by engaging the hook member 13a provided at the lower portion of the clamp ring gripping means 13 with the protruding portion 12b.
Further, four arms 12b are provided on the periphery of the clamp ring 12 in the radial direction, and are pressed from above by a clamping arm 15a that moves up and down of the clamp ring fixing means 15.

Next, a turbine hub welding method using the workpiece fixing and holding device 10 configured as described above will be described. FIG. 5 is a perspective view showing a procedure for attaching a clamp ring in the turbine hub welding method, and FIG. 6 is a front view thereof.
First, as shown in FIG. 5 and FIG. 6, before the workpiece welding of the turbine hub, the turbine main body A and the hub shaft B are placed on the turntable 11.
Next, the clamp ring gripping means 13 is operated to place the clamp ring 12 on the turbine main body A, and then the locking portion 12a on the periphery of the clamp ring 12 is clamped downward by the clamp ring fixing means 15 so that the turbine The main body A is fixedly held on the turntable 11.
Next, the work shaft pressing means 14 is lowered to press the hub shaft B placed on the turbine body A, and the tip of the work shaft pressing means 14 that contacts the hub shaft B is against the hub shaft B. It is held so that it can rotate freely.
Thereafter, the turntable 11 is rotated to release the hook member 13 a of the clamp ring gripping means 13 from the locking portion 12 a of the clamp ring 12.
Thus, both the workpieces A and B (the turbine body A and the hub shaft B) are pressed and held on the turntable 11 by the clamp ring 12 and the workpiece shaft pressing means 14 so as to be rotatable.

  In addition, the workpiece | work A and B used as the member of the turbine hub H is mounted on the turntable 11 via the conveyance loader which is not shown in figure.

In the welding operation, the two welding torches 16 of the welding apparatus are advanced to a predetermined position near the contact portion D, and the contact portion D is rotated along the tips of the two welding torch 16 to perform the welding operation. Execute. At the time of welding, the workpiece shaft pressing means 14 and the clamp ring fixing means 15 keep pressing and clamping the workpiece, respectively.
After the welding is completed, the welding torch 16 is moved out of the interference area, the clamp ring gripping means 13 is lowered and the clamp ring 12 is gripped and lifted, and the work shaft pressing means 14 is lifted, and the state shown in FIG. Return to.

  As described above, according to the workpiece fixing and holding device of the present invention and the welding method using the same, the workpiece A and the workpiece B which have been welded and joined are taken out and the clamp ring is attached to the turbine when the next workpiece is carried in. As it is lifted without being removed from the hub welding device, it can be temporarily retracted, and the working efficiency can be improved.

  In the present invention, a work B (hub shaft) placed in a shaft hole of a work A (turbine main body) is pressed and held on a turntable by a clamp ring, and a contact portion between the work A and the work B rotating and moving. The gist is that welding can be performed along D, whereby a plurality of workpieces can be welded efficiently and reliably, and the industrial applicability is extremely high.

It is a front view of the workpiece | work fixed holding | maintenance apparatus which concerns on one Example of this invention. It is operation | movement explanatory drawing of the workpiece | work fixed holding | maintenance apparatus. (A) is a longitudinal cross-sectional view showing the upper half of the turbine tab H, (b) is a hollow body of the turbine body A formed in a concave bowl shape, and the hub shaft B is integrally welded to the shaft hole E. It is a schematic explanatory drawing which shows the state manufactured by manufacturing. It is a perspective view of the clamp ring of the work fixing and holding device. It is a perspective view which shows the attachment procedure of the clamp ring in the workpiece | work fixed holding | maintenance apparatus. (A) is a front view which shows the attachment procedure of the clamp ring, (b) is the principal part enlarged view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work fixed holding apparatus 10a Apparatus main body 11 Turntable 12 Clamp ring 12a Locking part 12b Arm 12c Center hole 13 Clamp ring holding means 13a Hook member 14 Work shaft pressing means 14a Lower end 14b Cylinder drive part 15 Clamp ring fixing means 15a Clamping pressure Arm 15b Cylinder driving part 16 Welding torch (welding device)
H Turbine hub A Turbine body (work A)
B Hub axle (work B)
C Turbine blade D Contact part E Shaft hole S Clearance

Claims (4)

A workpiece fixing and holding device used when inserting the workpiece B into the shaft hole of the workpiece A and welding both the workpieces,
Clamping ring gripping means provided on the workpiece A so as to be movable up and down;
A donut-shaped clamp ring that is detachably suspended by the clamp ring gripping means and presses the workpiece A from above;
Clamp ring fixing means for pressing and fixing the periphery of the clamp ring after pressing the workpiece A from above;
A workpiece fixing and holding device comprising: A workpiece fixing and holding device used when inserting the workpiece B into the shaft hole of the workpiece A and welding both the workpieces,
A turntable on which work A is rotatably mounted;
Clamp ring gripping means provided so as to be movable up and down facing the rotating table;
A donut-shaped clamp ring that is detachably suspended by the clamp ring gripping means and presses the workpiece A from above;
Clamp ring fixing means that clamps the periphery of the clamp ring after pressing the workpiece A disposed on the rotary table and fixing it to the rotary table from above.
A workpiece fixing and holding device, comprising: a workpiece shaft pressing unit that presses an upper portion of the workpiece B inserted into the shaft hole of the workpiece A to fix and hold the workpiece B in the shaft hole of the workpiece A. While moving forward and backward to the welding position in a non-interfering state with respect to the clamp ring gripping means and the work shaft pressing means for fixing the work A and the work B,
The upper part of the work B inserted into the shaft hole of the work A is pressed to weld the contact portion between the work A and the work B after the work B is fixedly held in the shaft hole of the work A. The work fixing and holding device according to claim 1, further comprising a welding device for performing the work. A workpiece welding method using the workpiece fixing and holding device according to claim 1,
A clamp ring gripping means is provided above the workpiece A so as to be movable up and down,
A donut-shaped clamp ring is removably suspended by the clamp ring gripping means,
The workpiece A is pressed from above by the clamp ring ,
By clamp ring fixing means,
A work welding method, comprising pressing the work A from above to clamp and fix the periphery of the clamp ring from above .

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