JPH0312473Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is a welding positioner fixture used in manufacturing construction machinery, etc., and is suitable for use when the shape of the box-shaped welded structure to be manufactured is different. This invention relates to a centering and mounting device for a welding positioner that allows easy installation and centering even when the welding positioner is in use.

<Problems to be solved by conventional technology and ideas> In conventional welding lines, several fixtures for box-shaped welded structures are prepared specifically for each shape, and the fittings for box-shaped welded structures to be welded are fixed. The fixtures on the welding positioner are replaced for each item, which results in a lot of loss in setup changeover time. In addition, with this method, since the fixtures must be moved and reloaded, hydraulic actuators cannot be used, and workpieces must be tightened and removed manually.
The drawback was that it could not be completely unmanned.

<Means for solving the problems> The present invention was developed in view of the above-mentioned circumstances. To provide a centering and mounting device capable of automatically positioning a workpiece easily without requiring hands, and mounting and tightening a workpiece on a welding positioner.

In order to achieve the above object, the present invention allows the main body to be mounted on a ready-made welding positioner, and a connecting fitting (slip ring) for connecting with an external control panel is rotatable in the center of the lower surface of the main body. At the same time as tightening, install a rotary joint for pressure oil inside the hollow part of this slip ring.
On the other hand, a centering clamp is installed on the upper surface of the main body to tighten and center the work in the lateral direction using link clamps from both sides of the work. The cylinder performs positioning in several stages, and a pressing cylinder provided on the other side of the cylinder forms a guide stopper that presses the workpiece against the positioning portion of the cylinder, and each of the above positions and centers the workpiece. After that, the welding positioner centering and mounting device was constructed by providing a clamp cylinder that crimped and fixed the work.

<Operation> After the centering and mounting device is positioned at the rotation reversal portion of the welding positioner main body, it is fixedly mounted with a screw. The operation of this centering and mounting device is such that the workpiece for the temporary mounting process on the top surface of the conveyor is lifted by a cart with a table lifter, transported to the bottom of the centering and mounting device, and then the workpiece is crimped onto the centering and mounting device by the table lifter. As a result, the limit switch operates and the centering cylinder tightens the workpiece from both sides, centering the workpiece in the lateral direction. Next, to position the workpiece in the longitudinal direction, press the workpiece against the abutment part (L-shaped reference block) of the cylinder (L-shaped reference block), which has been previously positioned to the standard dimensions of the workpiece, with a pressing cylinder, and then press the bottom plate of the workpiece with a clamp cylinder. Fix it. Due to the above actions, the installation of the workpiece is completed,
After that, the cart with table lifter descends and returns to its origin, and when the positioner is reversed, it assumes the welding position. When removing it, this process is reversed.

<Example> Fig. 1 is a perspective view of the entire assembly of a centering mounting device according to an embodiment of the present invention mounted on a welding positioner, and Fig. 2 is a perspective view of a box-shaped welded structure mounted on the mounting device. FIG. 3 is a perspective view of the entire centering and mounting device; FIG.
The figure is an assembled exploded perspective view of the slip ring and rotary joint. Also, Figures 5 and 6 are perspective views of the combination of the movement of the cylinder and the pressing cylinder, Figure 7 is a perspective view of the configuration of the cylinder and a partial cross section, and Figure 8 is a perspective view of the clamp cylinder. FIG. 9 is a partially exploded cross-sectional perspective view, and FIG.
FIG. 10 is a perspective view of a pressing cylinder; FIG. 11 is a partial cross-sectional perspective view of a 2-degree cylinder plus a 1-degree cylinder;
Figure 2 is a partially sectional perspective view of the cylinder.

The centering and mounting device 1 includes a main body 2, a centering clamp 3, a second cylinder 4, a pressing cylinder 5, a clamp cylinder 6, a manifold 7, a solenoid valve 8, a rotary joint 9, and a slip ring 1.
0 is the main component.

The main body 2 of the centering and mounting device 1 is plate-shaped and has a bolt hole so that it can be mounted on the table of an existing welding positioner, a center hole 11 is provided, and a connection fitting with an external control panel is provided on the lower surface 12 of the main body 2. (Slip ring) 10 is rotatably fastened, and a rotary joint 9 for pressure oil is internally installed in an inner hollow portion 13 of this slip ring 10. On the other hand, a manifold 7 and a solenoid valve 8 are provided on the upper surface 14, and a pressure oil pipe is connected to the manifold 7. Furthermore, a centering clamp 3 is provided on the upper surface 14 for positioning in the lateral direction, and this configuration is shown in FIG. The centering clamp 3 shown in the same figure has a clamp lever receiver 16 provided at each end of the rod portion and head portion of a cylinder jack 15, and the clamp lever receiver 16 is attached to a guide rod 17 fixed to the main body 2 via a block 18. 16 are slidably fitted. Each of the clamp lever receivers 16 is rotatably provided with a lever 20, which is connected to a rod 21 disposed on both sides of the jack 15 via the lever 20. This rod 21 is slidably provided on a guide receiver 22, and a convex cam floor 23 is attached to one rod 21, and a convex cam floor 23 is attached to the other rod 21.
Two cam floors 23' are attached to 1'.

On the other hand, the configuration of the two-stroke cylinder 4 for positioning in the longitudinal direction is shown in FIG. The two-stroke cylinder 4 shown in the figure has a piston rod 25 symmetrically installed in the tube of the cylinder 24, and these piston rods 2
The cylinder 24 having a convex portion 30 inside is slidably installed on a guide 31. One piston rod 25 is fastened to a block 26 fixed to the main body 2, and when pressure oil is sent to the head side of the piston rod 25 through an oil pipe 32, the cylinder 2
4 slides along the guide 31, and
An L-shaped reference block 28 is fixed to the tip of the other piston rod 27.
When pressure oil is sent to the head side of the cylinder 7 through the oil pipe 33, the L-shaped reference block 28 moves forward relative to the cylinder 24. Note that the relationship between the convex portion 30 of the cylinder 24 and the guide 31 may be reversed. Next, the pressing cylinder 5 for press-fitting the workpiece to the L-shaped reference block 28 of the cylinder 4 will be described with reference to FIG. This pressing cylinder 5 has a cylinder 34 attached to a support 35 fixed to the main body 2,
A guide rod 36 is connected to the cylinder piston 37 of the cylinder 34 via a plate. The guide rod 36 is slidably attached to the support 35, and a cam floor 38 is provided at the tip thereof, so that the guide rod 36 is moved in the axial direction by the action of the cylinder 34.

The clamp cylinders 6 are provided at four circular locations on the upper surface 14 of the main body 2 around the center hole 11, and as shown in FIG. established,
A clamp 42 is connected to the end of a piston rod 41 of this cylinder 40 by a pin 43. The clamp 42 is rotatably attached to the fixed guide receiver 39 via a pin 45, and the hole into which the pin 43 is inserted is a longitudinally long elongated hole 44, and the other end is bent into an L-shape for gripping. It has become a department. Next, a tightening operation using the above-mentioned centering and mounting device 1 will be explained. In Fig. 1, centering mounting device 1
is fixed to the table surface of the welding positioner with screws, and is turned downward. The box-shaped welded structure 50 is conveyed by a chain conveyor 46 from the lower left in the figure, and a table lifter-equipped cart 47 is disposed at the lower part. Cart with table lifter 4
Reference numeral 7 can run on a rail track, and the lower part of the chain conveyor 46 at both ends is stopped at three positions below the welding positioner. The longitudinal dimension position of the centering and mounting device 1 is determined in advance by the double cylinder 4 according to the shape of the box-shaped welded structure 50 (states shown in FIGS. 3, 5, and 6). . Once the above conditions are met, the operator presses the automatic start button. Then, the lifter of the cart with table lifter 47 rises and the chain conveyor 46
The upper box-shaped welded structure 50 is lifted from the conveyor surface and conveyed directly below the welding positioner 48, and the lifter is further raised to bring the box-shaped welded structure 50 into contact with the centering and mounting device. When the box-shaped welded structure 50 comes into contact with the centering attachment device, the limit dock 5
2 is operated, the lifter of the cart with table lifter 47 stops, the cylinder jack 15 of the centering clamp 3 for lateral positioning in the centering and mounting device 1 is extended, the clamp lever receiver 16 is moved, and the respective levers 20 retracts the rod 21 and centers the welded box structure 50 by means of the cam floors 23, 23'. On the other hand, for longitudinal positioning, when the pressing cylinder 5 is operated and the cylinder piston 37 is extended, the guide rod 36 moves forward and the cam floor 38 at the tip end is moved forward.
comes into contact with the end face of the box-shaped welded structure 50, and the box-shaped welded structure 50 is further moved and crimped onto the L-shaped reference block 28, thereby positioning the box-shaped welded structure 50 in the longitudinal direction. Finally, clamp cylinder 6
This fixes the lower plate of the box-shaped welded structure 50. That is, when the piston rod 41 of the cylinder 40 expands, the clamp 42 is reversed around the pin 42, and the box-shaped welded structure 50 is attached at the tip of the clamp 42.
to grasp. And a trolley with table lifter 4
When the lifter 7 descends and returns to its original position, the welding positioner 48 is reversed by 180 degrees to take a welding position, and the welding robot 49 starts welding. Thereafter, when the welding is completed, the box-shaped welded structure 50 is loaded onto the right chain conveyor 46' in the reverse order as described above. Incidentally, the two-stroke cylinder is not limited to the above-mentioned embodiment, but as shown in FIG. The first cylinder 53 may be fixed to the cylinder support 55, or two or more cylinders 24 may be arranged in series as shown in FIG. 12.

<Effects of the invention> As described above, according to the centering and mounting device according to the present invention, even if the dimensions in the longitudinal direction and the lateral direction are different, positioning can be performed without requiring human hands and without changing setups. Can be done. Further, it can be easily attached to the member to be fastened, and welding work can be completely unmanned. Furthermore, since there is no need to replace the mounting jig for each member to be tightened, which is the case in the past, work efficiency can be improved in this respect as well.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire assembly of a centering and mounting device according to an embodiment of the present invention, Fig. 2 is a perspective view of the entire assembly of a member to be fastened to the mounting device, and Fig. 3 is a perspective view of the entire centering and mounting device. Figure 4 is an exploded perspective view of the slip ring and rotary joint.
Figures 5 and 6 are perspective views of the combination of each movement of the 2-stroke cylinder and the pressing cylinder, Figure 7 is a partially sectional perspective view of the 2-stroke cylinder, and Figure 8 is a partially exploded sectional perspective view of the clamp cylinder. , FIG. 9 is a perspective view of the structure of the center clamp, FIG. 10 is a perspective view of the pressing cylinder, FIG. 11 is a partial cross-sectional perspective view of the 2-degree cylinder plus 1-degree cylinder of another embodiment, and FIG. 12 is a perspective view of the configuration of the center clamp.
The figure is a partially sectional perspective view of a four-cylinder cylinder according to another embodiment. In the drawing, 1 is a centering installation device, 2 is a main body, 3 is a centering clamp, 4 is a 2-cylinder cylinder, 5 is a pressing cylinder, 6 is a clamp cylinder, 7 is a manifold, 8 is a solenoid valve, and 9 is a rotary joint. , 10 is a slip ring, 20 is a lever, 2
3, 23' are cam floors, 24 are cylinders, 28
is an L-shaped reference block, 30 is a convex portion, 31 is a guide, 38 is a cam floor, 39 is a fixed guide receiver,
42 is a clamp, 44 is a long hole, 46 and 46' are chain conveyors, 47 is a cart with table lifter, 4
8 is a welding positioner, 49 is a welding robot, 50
5 is a box-shaped welded structure, 52 is a limit switch, 53 is a cylinder, and 54 is a special piston.

Claims (1)

[Scope of utility model registration request] A centering clamp having a rotating protrusion is provided on the upper surface of the main body for positioning the member to be fastened in the lateral direction, while pistons are arranged symmetrically in an integral cylinder for positioning one end in the longitudinal direction, and one of the pistons is provided. A multiple cylinder having a reference block that slides at the end of the cylinder is provided at the cylinder end, and a pressing cylinder having a cam floor at one end and latched to the cam floor to press the member to be fastened to the reference block is provided on the multiple cylinder. A clamp cylinder is installed to press and hold the member to be fastened, which is centered by the centering clamp, the multi-stroke cylinder, and the pressing cylinder, with a lever clamp, and a connecting fitting and a rotary joint are installed on the lower surface side of the main body. A centering and mounting device for a box-shaped welded structure, characterized in that it is rotatably provided.