JPH054947Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a workpiece pedestal floating device for a seam welding machine. When there is a condition where the hollow shaft must be provided on only one side without surrounding it, a sliding rod on one side offset from the hollow shaft and a floating rod inserted through the hollow shaft are arranged in a triangular arrangement, and the said rod is used as a workpiece. To stably cause floating even if the electrode pair of a seam welding machine, which is removably fixed from the bottom of the pedestal and is repeatedly replaced and reduced in diameter due to wear, is fed by sandwiching the welding edge of the workpiece. It is something.

(Prior Art) The workpiece of a conventional seam welding machine is mounted on the workpiece and the welding edge is sandwiched between the upper and lower rotating welding electrode pairs of the seam welding machine and the workpiece is fed. Since floating occurs due to the degree of decrease in the workpiece, a floating rod is brought into contact with the workpiece pedestal from below to cause floating. However, in normal cases, a tracing table is attached to a hollow shaft freely rotatable in a supporting tube at the other end of a tracing jig, which is composed of multiple connected arms with one side pivoted on the side of the seam welding machine. Several guide tubes surrounding the four circumferences of the hollow shaft are provided protrudingly on the periphery of the hollow shaft, and several sliding rods b are protruded from the lower surface of the workpiece pedestal a, which is placed on the tracing table as shown in Fig. 4. A floating rod c that freely slides through each guide tube of the profiling table and projects upward from a hollow shaft is brought into contact with the lower surface of the workpiece pedestal a at the center of each sliding rod b. Since the guide tube and the sliding rod rotate around the support tube at the other end of the tracing receiving jig along with the feeding and collide with the tracing receiving jig, it is not possible to stabilize the floating by lengthening the rod. On the other hand, the floating rod c is designed to collide with the lower surface of the workpiece pedestal a to facilitate the replacement of the workpiece pedestal a, so due to the shape of the workpiece, two sliding rods are installed only on one side of the hollow shaft. For workpiece pedestals that require a moving guide b, even if an attempt is made to add a sliding rod b _-1 to balance the triangular arrangement as shown in Figure 5, the floating rod c will get in the way. When the workpiece pedestal a floats due to a change in the diameter of the electrode pair, it rises,
It has the drawback of making the descent unstable, and in the worst case, stopping midway through both the ascent and descent.

(Problems to be Solved by the Invention and Purpose of the Invention) In view of the above-mentioned drawbacks, the present invention has developed a floating rod 12 that protrudes from a hollow shaft and conventionally only makes contact with the lower surface of the workpiece pedestal. pedestal 2
The two sliding rods 21 and the floating rod 12, which protrude from the lower surface of the workpiece pedestal 20 on one side of the hollow shaft, are inserted into the hollow shaft from below and fixed in a removable manner. To stabilize floating by fixing the workpiece W in an offset position when viewed from the workpiece pedestal 20, and preventing the tendency of slight inclination in the direction of the electrode pair as the workpiece W is fed by the electrode pair 2, 2a. The purpose is to

(Means for solving the problems) The present invention meets the above objectives, and
A profiling table is attached to a rotatably provided hollow shaft in the supporting cylinder at the other end of a profiling jig consisting of multiple connected arms with one end pivoted on the side of the seam welding machine, and the workpiece is placed on the profiling table. A workpiece in which the sliding rod protruding from the bottom of the pedestal is passed through a guide tube protruding from the bottom of the tracing pedestal, and the welding edge of the workpiece to be attached to the workpiece pedestal is sandwiched between the upper and lower rotating welding electrodes of the seam welding machine. In the cradle device,
Conventionally, the guide tube 19 provided on the tracing table 18 was provided to surround the hollow shaft 8, but the guide tube 19 was not placed around the hollow shaft 8 because the product was small and there was no space for the guide tube. When the condition requires that only one side be used, the workpiece pedestal 2
The two sliding rods 21, 21 provided on the lower surface of 0 are slidably passed through guide tubes 19, 19 provided on one side of the hollow shaft 8 of the tracing table 18, and protrude upward from the hollow shaft 8. Said floating rod 12
The upper end is inserted into the workpiece holder 20 from below and removably fixed, and each sliding rod 21 and the floating rod 12, which is removably fixed to the workpiece holder 20, are attached to the workpiece holder 20. This invention relates to a workpiece pedestal floating device for a seam welding machine that has a triangular arrangement.

(Example) FIG. 2 is a partially cutaway side view of a seam welding machine according to the present invention, and FIG. 3 is a front view of the same.

In the figure, reference numeral 1 denotes a seam welding machine, which is equipped with a pair of upper and lower rotating welding electrodes 2, 2a that keep the circumferential speed constant.
3 has one end pivotally supported on the welding machine 1 side, and the first arm 4
This is a tracing jig consisting of a plurality of articulated arms in which a second arm 5 is connected by a joint shaft 6, and a hollow shaft 8 is inserted into a shaft support tube 7 fixed to the other end and rotated freely by a bearing. Pivotal support, hollow shaft 8
A spring receiver 9 is inserted into the lower part of the inside of the spring receiver 9, and the spring receiver 9 is made vertically adjustable by a rod portion 10 made of a threaded rod, and the rod 10 is protruded from the lower surface of the shaft support cylinder 7. A long floating rod 12 is inserted through the tube 9 from above via a float spring 11. The hollow shaft 8 is provided with a mounting seat 13 projecting from its upper end, and a ball slide bearing 14 is provided between the inner wall of the hollow shaft 8 and the floating rod 12 to support the rod 12 freely. A threaded rod 15 with a reduced diameter projects from the upper end of the floating rod 12 to form a receiving step 16, and a nut 17 is screwed onto the threaded rod 15.

18 is a platform, and the center of rotation is the hollow shaft 8.
It can be freely fixed to the mounting seat 13 of the corresponding tracing platform 1.
Two guide cylinders 19 are installed on one side of the hollow shaft 8 on the lower surface of the hollow shaft 8.
(See Figures 2 and 3). 20 is a workpiece holder placed on the upper surface of the tracing table 18, with two pin-shaped sliding guides 21 on the lower surface inserted into the two guide tubes 19, and a workpiece to be supplied to the upper surface of the workpiece holder. The welding edge 22 of W is rotated by the welding electrode pair 2, 2a.
It is the same as the conventional method that welding is performed by sandwiching the workpiece between the two, and the workpiece pedestal 20 and the profiling table 18 are rotated in an interlocked manner by feeding, and thereby the profiling jig 3 is interlocked.

(Operations and Effects) The present invention does not surround the four circumferences of the hollow shaft 8 which is rotatably supported by the shaft support tube 7 at the other end of the profiling jig 3 constituted by a plurality of connected arms, but only on one side of the hollow shaft. Regarding the tracing table 18 which has the condition that only the guide tube 19 can be provided, the sliding guides 21, 21 protruding from the lower surface of the workpiece pedestal 20 disposed on the upper surface of the tracing table 18 are installed on the lower surface of the tracing table 18. The floating rod 12 is slidably inserted into a guide tube 19 provided on only one side of the floating rod 12, and the floating rod 12 is removably fixed by a nut 17 through the lower surface of the work holder 20. Two sliding guides 21, 21 and a floating rod 12 fixed to the workpiece pedestal 20
are fixed in a triangular arrangement to stabilize the floating of the workpiece W, preventing a situation in which floating is impossible, and when replacing the workpiece pedestal 20, remove the workpiece pedestal from the upper end of the floating rod 12. 20 can be removed, it is easy to change the setup of the welding work, and if there is a problem with floating or welding and feeding using the electrode pair at the welding edge of the workpiece, the guide tube 19 can be removed in the fourth week of the floating rod 12. , with the same function as a conventional seam welding machine equipped with a sliding guide 21,
It has the effect of eliminating floating defects, welding defects, feeding defects, etc.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the principle of the present invention, Figure 2 is a partially cutaway side view of a seam welding machine incorporating the present invention,
FIG. 3 is a front view of the same. Fig. 4 is a schematic diagram explaining the conventional device, and Fig. 5 is a schematic diagram explaining that when the workpiece pedestal of the conventional device is supported by two sliding rods, an additional sliding rod cannot be provided. be. DESCRIPTION OF SYMBOLS 1... Seam welding machine, 2, 2a... Rotating welding electrode, 7... Shaft support tube, 8... Hollow shaft, 12... Floating rod, 18... Tracing table, 19...
Guide tube, 20...work holder, 21...sliding guide, W...work.

Claims (1)

[Scope of Claim for Utility Model Registration] A tracing table is attached to a hollow shaft freely rotatable in a support cylinder at the other end of a tracing jig, which is composed of a plurality of connected arms with one end pivoted on the side of a seam welding machine, Pass the sliding rod protruding from the bottom of the work cradle placed on the tracing pedestal through the guide tube protruding from the bottom of the traversing pedestal, and weld the welding edges of the workpiece to be attached to the work pedestal by rotationally welding the top and bottom of the seam welding machine. In a workpiece support device that is inserted between electrodes, a guide tube 19 provided on a tracing table 18 is connected to a hollow shaft 8.
When there is a condition where the work piece must be placed on one side only without surrounding it, the two sliding rods 21, 21 provided on the lower surface of the workpiece pedestal 20 can be replaced with a guide cylinder provided on one side of the hollow shaft 8 of the tracing board 18. 19, 19, and projects upward from the hollow shaft 8.
Each sliding rod 21 and the floating rod 12 which is removably fixed to the workpiece pedestal 20 are arranged in a triangular manner with respect to the workpiece pedestal 20. A workpiece pedestal floating device for a seam welding machine featuring: