JPH0513764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a weld bead trimmer device for a cylindrical member whose abutting portions are welded, such as a rim used in an automobile wheel.

(2) Prior art The structure of the butt weld bead trimmer device conventionally used in the process of processing wheel rims is based on the fourth
As shown in the figure, a horn 2 protrudes toward the front side of the frame body 1, a slide ram 6 that can be moved up and down by a cylinder 10, and the horn 2 and the slide ram 7 are penetrated through each other and parallel to each other at a certain distance. It consists of upper and lower rotating shafts 3, 7, each of which has a holder 4, 8 fixed to one end thereof, and a trimmer blade 5, 9 attached to the holder 4, 8.
The other end is connected to a motor so that they rotate in the same direction.Furthermore, a pair of lower chucks 11 are provided on the left and right side walls of the horn 2, and a pair of lower chucks 11 are provided on the left and right side walls of the slide ram 6. A pair of upper chucks 12 which correspond to each other and move toward and away from each other are provided.

(3) Problems to be Solved by the Invention In the conventional trimmer device described above, the work W is clamped to the horn 2 at the position shown in FIG. 4 by the lower chuck 11 and the upper chuck 12, and the rotating shaft 3, Weld bead portion W1,
The cutting work of W2 is performed, and the workpiece W is fixed by the upper and lower chucks 11 and 12 on a circular arc surface corresponding to a shoulder relatively far from the weld bead parts W1 and W2, and this part is free-bending. It is difficult to accurately align the weld bead parts W1 and W2 because the curvature is not necessarily constant, and as a result, some weld bead parts are left behind.
Alternatively, excessive trimming often occurs, and extra work such as repair using a grinder or overlay repair is required after trimming, which is a problem from the viewpoint of workability, finishing accuracy, and manufacturing cost. It was hot.

(4) Means for Solving the Problems The present invention is the result of various studies that have been devised in order to solve the various problems mentioned above. a horn that receives approximately half of the surface; a lower rotating shaft that passes through the horn and whose tip extends in the direction in which the horn projects; and a slide ram that is movable in the vertical direction by a cylinder;
an upper rotating shaft that passes through the slide ram and is provided parallel to the lower rotating shaft at a constant interval;
It consists of a motor that applies rotational driving force to the upper rotating shaft and the lower rotating shaft, and a pair of chucks that approach and separate from each other and extend approximately half the width of the cylindrical member are provided on the upper surface of the horn and the lower surface of the slide ram. A trimmer for a butt weld bead in a cylindrical member, in which a pair of holders are fixed to the upper and lower rotating shafts protruding forward from the pair of chucks, each having a trimmer blade that reaches the remaining half width of the cylindrical member. It is a device.

(5) Examples Below, the specific contents of the present invention will be explained in Sections 1 to 3.
To explain based on one embodiment in the figure, 21 is a frame body, 22 is a horn that protrudes from the front of the frame body 21 and can receive approximately half of the inner peripheral surface of the cylindrical member W, and 28 is a vertically movable horn. A freely adjustable slide ram, 23 is a lower rotating shaft, 31 is an upper rotating shaft, 27
33 is a lower chuck, 33 is an upper chuck, 25 is a lower blade holder, and 34 is an upper blade holder. horn 22
A lower rotating shaft 23 extending in the projecting direction passes through the lower blade, one side of which is connected to the drive motor 24 at the rear side of the frame body 1, and the other side of the lower blade reaching the remaining half width of the cylindrical member mentioned above. A holder 25 is integrally fixed, and a trim lower blade 26 is attached to the lower blade holder 25.

The slide ram 28 is fixed to the lower end of an extendable rod 29 by a cylinder 30 held by a crown 36 at the upper end on the front side of the frame body 21, and can be moved vertically as desired by the operation of the cylinder 30.

Furthermore, an upper rotating shaft 31 parallel to the lower rotating shaft 23 described above is passed through this slide ram 28,
One side thereof is connected to a drive motor 32 on the rear side of the frame body 1, and another upper blade holder 34 corresponding to the lower blade holder 25 described above is fixed to the other side, and furthermore, the upper blade holder 34 corresponding to the lower blade holder 25 is fixed to the other side. A trim upper blade 35 is attached to the upper blade holder 34.

Further, the lower chuck 27 is attached upward to the upper surface of the horn 22, and has a weld bead W2 in the center.
The upper chuck 33 has an escape groove 27a extending in the axial direction of the cylindrical member, and the upper chuck 33
It is attached to the bottom surface of the
7, it has an escape groove 33a corresponding to the escape groove 27a of the weld bead W1, and the upper and lower chucks 27 and 33 form a pair, and the lower chuck 2
7, the upper chuck 33 can be moved toward and away from the cylinder 30.

(6) Effect In the above configuration, the slide ram 28 is initially in an upper position due to the cylinder 30, and in this state, the workpiece W is inserted into the horn 22 and the inner peripheral surface of the workpiece W is placed on the lower chuck 27 on the upper surface of the horn 22. Approximately half the width of the inner weld bead W2 is formed into an escape groove 27a.
Position it by positioning it inside.

Next, the slide ram 28 is moved by the cylinder 30.
is lowered, and the upper chuck 33 on its lower surface is brought into pressure contact with the workpiece W to be clamped (at this time, the weld bead W1 on the outer surface of the workpiece W is located within the relief groove 33a of the upper chuck 33).

Next, the motors 24 and 32 are driven to rotate the upper and lower rotating shafts 23 and 31 in the same direction synchronously over a certain angle, and the trim lower blade 26 and the trim upper blade 35 are used to remove the inner and outer surfaces of the workpiece W. The weld beads W1 and W2 protruding from each other are cut and trimmed, thereby completing the trim work for half the width of the cylindrical member.

Then the slide ram 28 is moved by the cylinder 30.
is raised to release the clamp, and once the work W is taken out from the horn 22, it is reversed and the weld bead of the work corresponding to the half width on the opposite side is trimmed using a separate second trimmer device in the same manner as above. Cutting completes the trimming of the full width of the butt weld bead of the workpiece W.

(7) Effects of the Invention Since the present invention has the above-described configuration, a cylindrical member such as a wheel rim in which both ends of a plate material are butt welded has a cylindrical member that is butt-welded because it is necessary to align the butt end faces during welding. Only the part around the part is flat, and by clamping this flat part, the weld bead part of the cylindrical member can be accurately positioned and clamped. Since the weld bead can be trimmed accurately along the trimmed surface, there is no leftover or excessive removal on the trimmed surface, which eliminates the need for post-processes such as grinding or overlay repair, resulting in a high-quality product. can be obtained stably.

In addition, the above-mentioned accurate trim can reduce overload on the upper or lower blade and extend its life, and there are no obstacles such as chucks in the cutting area where the upper and lower trimming blades rotate. Since the holder that supports the lower blade can be made sufficiently large, the rotation locus of the lower blade at the cutting part can be made almost flat.

Furthermore, in this case, in addition to the above-mentioned oscillation method, it is also possible to rotate the holder that supports the lower blade once, which further promotes the natural fall of trim debris attached to the blade edge. It is no longer necessary to interrupt work to clean the blade edge, and it is also possible to fully automate trimmer work and operate it unmanned. This has resulted in various improvements such as improving the quality of cylindrical parts, improving work efficiency, and reducing product costs. Beneficial effects can be expected.

[Brief explanation of drawings]

Fig. 1 is a front view of a trimmer device that is an embodiment of the present invention, Fig. 2 is a side view showing the main parts in Fig. 1 in cross section, and Fig. 3 explains the operation of the upper and lower chucks and the upper and lower blades. Enlarged sectional view of main parts for
The figure is a front view of a conventionally known trimmer device. 21... Frame body, 22... Horn, 23
... Lower rotating shaft, 24, 32 ... Motor, 25
...Lower blade holder, 26...Lower blade, 27...Lower chuck, 28...Slide ram, 30...Cylinder, 31...Upper rotating shaft, 33...Upper chuck, 34...Upper blade holder, 35 ...Upper blade.

Claims (1)

[Claims] 1. A device for cutting burrs on a butt weld of a cylindrical member, including a horn that protrudes from the front of the frame body and receives approximately half the width of the cylindrical member, and a lower rotating shaft that passes through the horn and has a tip extending in the direction in which the horn protrudes. a slide ram movable in the vertical direction by a cylinder; an upper rotation shaft passing through the slide ram and parallel to the lower rotation shaft at a constant interval; and the upper rotation shaft and the lower rotation shaft. A pair of chucks that approach and separate from each other are provided on the upper surface of the horn and the lower surface of the slide ram, reaching approximately half the width across the butt welded portion of the cylindrical member. A weld bead trimmer device comprising: a pair of holders having trimmer blades extending the remaining half width of a cylindrical member fixed to upper and lower rotating shafts protruding forward from the pair of chucks;