JPH0351091Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a device that inverts and transfers an annular rim material from a welding process position to a trimming process position of a wheel rim welding device in a vehicle disc wheel production line. It is related to.

[Prior art] The wheel rim of a disc wheel is made by cutting a plate-shaped material into a fixed size, rolling it into a ring shape with a coiler, sending it to a welding device, where the butt parts are butt-welded, and the next step is the trimming process. A deburred annular rim is produced by sending the welding burr to a factory and removing the welding burr there.

In the welding process, it is necessary to set the wheel rim on the welding machine so that the butt part is facing downwards in order to prevent the molten metal from welding from scattering and adhering to the inner peripheral wall of the wheel rim, but in the trimming process It is desirable to set the wheel rim on the trimmer so that the welding area is on top so that the welding burr removed by the trimmer is unlikely to remain inside the annular wheel rim.

Conventionally, wheel rims that have been welded in the welding process on a wheel rim production line are sent manually to a trimmer for the next process, and the welding part of the wheel rim is turned upside down by a person who visually checks the welding area and then manually sends the welded wheel rim to the trimmer for the next process. It was carried out at

[Problems to be solved by the invention] However, manual work is inefficient, and it is not desirable in terms of the working environment to manually handle a hot wheel rim immediately after welding.
Even if this is automated, it is not easy to position and reverse the wheel rim, and the workpieces flowing through the wheel rim manufacturing line vary depending on the vehicle model, such as the diameter, width, and plate thickness of the annular workpiece. As the market changes, it must be possible to adapt to these changes, and automation cannot be easily achieved.

The purpose of this invention is to automate the transfer from the welding process to the next trimming process on a wheel rim manufacturing line by reversing the workpiece. The purpose of the present invention is to provide a transfer device that can respond to such changes.

[Means for Solving the Problems] To achieve the above object, the transfer device of the wheel rim welding device of the present invention performs butt welding at the welding process position by rolling a plate material and making the butt part the lower end. The device transfers the annular rim material from the welding process position to the trimming process position, which is the next process after the welding process position, and includes a pair of grippers that grip the annular rim material so that it can be gripped or removed from both sides in the axial direction, and the grippers. an axial drive means for reciprocating the arm in the axial direction of the annular rim material;
reversal transfer means for rotating the arm from a welding process position to a trimming process position such that the welded part of the annular rim material gripped by the gripper is below the welding process and above in the trimming process; The reverse transfer means includes a drive cylinder that is rotatable about a pivot point, a first gear that is pivotally connected to a rod of the drive cylinder and rotates, and a first gear that rotates integrally with the shaft. a second gear that is rotated and meshes with the first gear; and a slit that changes the connection position between the rod formed in the first gear and the first gear. consists of things.

[Operation] In the above device, the annular wheel rim, which is the workpiece, is welded at the welding process position with its abutting portion facing down, and immediately after welding is completed, it is gripped by being pinched from both sides by a pair of grippers. Ru.
Therefore, even if the diameter, width, and thickness of the workpiece flowing through the line change, the workpiece will be gripped by the grippers regardless of the diameter, width, and thickness. Subsequently, by driving the axial drive means, the arm supporting the gripper gripping the workpiece pulls out the workpiece from the welding table of the welding machine in the axial direction, and frees the workpiece in a direction perpendicular to the axis. In this state, the workpiece is transported from the welding process position to the trimming process position by driving the reversing and rotating means to rotate the arm 180 degrees. At this time, when the workpiece comes to the trimming process position due to rotation of the arm, the workpiece is turned over to a position where the welding part is on top. By changing the connection position between the rod of the drive cylinder and the first gear along the slit and changing the initial position of the rotation angle of the arm during reversal, it is possible to bring the welded part of the workpiece to a certain position on the trimmer. Even if the diameter of the work flowing through the line changes, the welded part of the work will be transferred to the correct position of the trimmer.

[Embodiments] Hereinafter, preferred embodiments of a transfer device for a wheel rim welding device according to the present invention will be described with reference to the drawings.

1 and 2 show the arrangement and structure of an embodiment of the present invention.

In the figure, 20 is a welding machine that butts and welds the workpieces, 30 is a trimmer for removing welding burrs, which is installed in the next step of the welding process, and 10 is the present invention that transfers the workpiece W from the welding machine 20 to the trimmer 30. a transfer device 40 for crushing the deburring welded part of the workpiece provided after the trimming process to make a smooth surface; 50 a side cutter for cutting the axial protrusion of the welded part of the workpiece; It is. The workpiece W is a wheel rim of a disc wheel for a vehicle, which is made by cutting a plate-shaped material into a fixed size, rolling it up, butting the abutting portions together, and welding the abutted portions together.

The welding machine 20 is loaded with a workpiece W that has been conveyed with the butt part facing down by the positioner in the previous process of the welding process.
A feeder 21 is provided for inserting the welding material into the welding table 22 of the welding machine 20 in the axial direction, that is, in the direction A in FIG. During welding, the workpiece W is placed on the welding table 22
is fixed.

The transfer device 10 has a pair of grippers 11 and 12 that grip the workpiece W from both sides in the axial direction, and the initial distance between the grippers 11 and 12 is determined by manually rotating a threaded rod 13. It can be adjusted by adjusting. This makes it possible to cope with changes in the width of the workpiece W. The grippers 11, 12 are opened and closed in the axial direction by a cylinder housed in a holder 14. Holder 14
is supported by one end of the arm 19, and the other end of the arm 19 is rotatably supported by the shaft 16. Arm 1
9 is a cylinder serving as an axial drive means 15 to move the shaft 16 of the drive means 15 in and out.
It is possible to move in the axial direction, that is, in the direction of B-B' in the figure. The holder 14 is also rotated 180 degrees in the DD' direction about the axis of the shaft 16 by the reversing transfer means 18 housed in the case 17. The reversing transfer means 18 meshes with a drive cylinder 18A that is rotatable about a pivot point 18F, a first gear 18B that is pivotally connected to a rod 18D of the drive cylinder 18A, and is rotated by the first gear 18B. and a second gear 18C that is rotated together with the shaft 16 about the center of the shaft 16 that is rotated by the arm 1.
9 is rotated 180 degrees around the center of the shaft 16 to invert and transfer the workpiece from the welding process position to the trimming process position. When the diameter of the workpiece W differs, the initial position of rotation will differ, and in order to adjust this, the slit 1 changes the connection position between the rod 18D of the drive cylinder 18A and the first gear 18B.
8E is engaged with the first gear 18B.

The trimmer 30 moves vertically with respect to a fixed table 31 and attaches the workpiece W to the table 31 from above.
It has a presser foot 32 that clamps the workpiece W by pressing against it, and the presser foot 32 is driven up and down by a cylinder 33 that supports the presser foot 32. Trimmer 30 bit (between tables 31 and 31 and presser foot 32 and 32)
(disposed in between, but not shown) is moved back and forth along the welding area to scrape off burrs on the welding area. 34
is a transfer device for loading and unloading the workpiece W into the trimmer 30, and in addition to being able to reciprocate in the axial direction by the cylinder 35, that is, in the C-C' direction in the figure, and in the perpendicular direction, that is, in the figure, by the cylinder 36. E of
Can reciprocate in the −E′ direction. The transfer device 34 and the cylinder 36 work together to send the workpiece W from the trimmer 30 to the planicher 40. The transfer device 41 of the planicher 40 is movable back and forth in the direction D-D' in the figure.
The workpiece W is sent from the planicher 40 to the side cutter 50 in cooperation with the cylinder 36. cylinder 36
After sending the workpiece W, moves in the E' direction and returns to the original position.

In the apparatus configured as described above, the workpiece W is transferred as follows.

First, the annular rim material W, whose butt part is set downward by the positioner, is conveyed in the direction A to the welding table 22 of the welding machine 20 by the feeder 21.
fixed on top. After setting the workpiece W on the welding table 22, the feeder 21 returns to the direction A' and prepares for the next conveyance. The work W is butt welded by the welding machine 20 with the butt part facing down.

When welding is completed, the gripper 1 of the transfer device 10
The arm 19 supporting the workpieces 1 and 12 is moved toward the welding machine 20 by the axial drive means 15, that is, in the B direction, and the reversing means 18 is driven in the D' direction so that the grippers 11 and 12 grip the workpiece W. The arm 19 is rotated around the axis of the shaft 16 until it reaches the position shown in FIG. Next, the grippers 11 and 12 are driven by their drive cylinders in a direction in which the grippers 11 and 12 approach each other to grip the workpiece W from both sides in the axial direction. Next, the axial drive means 15 is driven to move the workpiece W in the direction B' to pull it out from the welding table 22,
The workpiece W is pulled out to a position where it does not interfere with the welding table 22. Subsequently, the inversion transfer means 18 is driven to transfer the arm 1.
9 is rotated 180 degrees in the D direction around the axis of the shaft 16, and the workpiece W is also brought to the position of the trimmer 30.
At this time, the welded portion of the workpiece W naturally moves upward in response to the rotation of the arm 19. Subsequently, the axial drive means 15 is driven to move the workpiece W toward the trimmer 30, that is, in the B direction, and the workpiece W is moved toward the trimmer 30.
Place the presser foot 32 on the cylinder 33.
The workpiece W is fixed to the trimmer 30 by being lowered by the trimmer 30. The reverse transfer device 18 does not return to the B' direction,
Rotate in direction D′ while unclamping and return to original position. The burr on the welded part of the workpiece W is trimmed by the trimmer 30 with the welded part facing upward. At this time, since the welding part is on the top, it is possible to prevent the burrs from falling into the workpiece W by blowing away the falling burrs by, for example, installing a blower. When trimming is completed, the gripper of the transfer device 34 holds the workpiece W, and the cylinder 35
The workpiece W is pulled out from the trimmer 30 by driving in the C' direction, moved in the E direction by the cylinder 36, moved in the D direction by the cylinder 41, and then the workpiece W is pulled out from the trimmer 30.
send to After planishing the workpiece W of the planisher 40, the transfer device 41 is driven in the D' direction, the cylinder 36 is driven in the E direction, and the side cutter 50 is moved.
Send work W to. Thereafter, the cylinder 36 is driven in the E' direction and returns to its original position.

In the above, the diameter, width, and plate thickness of the workpiece W flowing through the line vary depending on the vehicle model, but the workpiece W
Even if the diameter, width, and plate thickness of the grippers 11 and 12 change,
Since the gripper holds the workpiece W by pinching it from both sides in the axial direction, the workpiece W can be gripped regardless of changes in diameter, width, and plate thickness. Also, when the diameter changes, the initial position of rotation of the work W in the welding machine 20 changes, but by changing the connection position of the rod 18D of the drive cylinder 18A of the reversing transfer device 18 and the first gear 18B by shifting it with the slit 18E. , can deal with it. The inversion angle of the arm 19 of 180 degrees remains the same even if the diameter of the workpiece W changes. By setting the reversal angle to 180 degrees, the welded portion of the workpiece W is naturally and correctly reversed from the lower position at the welding process position to the upper position at the trimming process position.

[Effects of the invention] When the transfer device of the wheel welding device of the present invention is used, it is possible to automate the transfer of the workpiece from the welding machine to the trimmer, to reverse the welding part vertically, and to make it possible to change the plate thickness, width, and diameter of the workpiece. Even if things change, you can still deal with them. In particular, by changing the connection position between the rod of the drive cylinder and the first gear along the slit, the welded part of the workpiece can be brought to a constant position on the trimmer even if the diameter of the workpiece changes.

[Brief explanation of the drawing]

FIG. 1 is a side view of a transfer device of a wheel rim welding device according to an embodiment of the present invention, and FIG. 2 is a plan view of the device shown in FIG. 1. 10...Transfer device, 11,12...Gritzpa,
14... Holder, 15... Axial drive means, 16
... shaft, 18 ... reverse transfer means, 18A ... drive cylinder, 18B ... first gear, 18C ... second gear, 18E ... slit, 19 ... arm, 20 ... welding machine, 30 ...Trimmer, W...Wheel rim material (work).

Claims (1)

[Scope of utility model registration request] This is a device that transfers an annular rim material which has been butt welded at a welding process position by rolling a plate material with the butt part at the lower end from the welding process position to a trimming process position which is the next process after the welding process position, A pair of grippers that grip the rim material so as to be able to grip or release the rim material from both sides in the axial direction, an arm that supports the grippers so that their position can be adjusted in the axial direction of the annular rim material, and a reciprocating motion of the arm in the axial direction of the annular rim material. and a welding process centered on the axis of the shaft so that the welded part of the annular rim material gripped by the gripper is at the top in the trimming process from the bottom position in the welding process. and a reversing transfer means that rotates from the position to the trimming process position, the reversing transfer means comprising:
A drive cylinder that can rotate around a pivot point,
a first gear pivotally connected to and rotated by the rod of the drive cylinder; a second gear rotated integrally with the shaft and meshed with the first gear; and a first gear. A transfer device for a wheel rim welding device, comprising: a slit for changing the connection position between the rod and the first gear formed in the rod.