JPS60180684A - Tip grinding device of welding gun - Google Patents

Abstract

PURPOSE:To obtain a tip grinding device that can grind the chip of a welding gun automatically and at high accuracy by setting the direction of a cutting edge flush with upper and lower tips and advancing and grinding keeping the flush state. CONSTITUTION:A rotary plate 33 is provided on a base 31, and a slidable sliding member 40 is provided in the rotary plate 33 and slid by a slide cylinder 42, and further, an angle change cylinder 41 that turns the rotary plate 33 at specified angle is provided. A grinder 1 having a cutting edge 11 conforming to the shape of tip is fixed to the sliding member 40. With the welding gun in open state, the center point P of the cutting edge 11 is positioned at intersection of axial lines M, N of tips 50, 51, and stroke of the angle change cylinder 41 is set by an angle theta at which axial line X of the cutting edge 11 becomes right angles to axial lines M, N. As the cutting edge 11 is moved back and forth on axial lines M, N by the slide cylinder 42, the chip of the welding gun can be polished accurately and automatically with the same center at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a welding gun tip polishing device, and more particularly to a device for automatically polishing an electrode tip of a spot welding gun.

(Prior Art) Conventionally, a tip polishing device for a welding gun has been manually operated using a handy type tip asp;+a.

Therefore, since the polishing is done manually, there is a problem in that the shape of the chip after polishing varies, resulting in uneven welding.

In addition, when polishing the tip of a welding gun that has been removed by the robot, it is necessary to stop the robot and polish the tip, which not only reduces the robot's operating rate but also reduces the robot's range of motion. There was a problem in that it was dangerous for workers to go inside and carry out the work.

In addition, as a chip polishing device, for example, one can use the pressure force of a welding gun to perform IPJ polishing with the upper and lower chips being pressed between the cutting blades of the polisher, but in this case, the pressure of the welding gun is High pressure (200kgf~300kgr)
This creates an excessive load on the polishing machine and causes the cutting edge to become unstable due to rotation.However, it would be possible to reduce the pressure by adjusting the pressure of the welding gun during polishing. It becomes necessary to adjust the pressurizing force J every time a polishing operation is performed, which is wasteful and reduces work efficiency.

(Object 1 of the Invention) The present invention has been made to eliminate the above-mentioned conventional problems, and its purpose is to automatically shape the tip of the welding force into a constant shape with high accuracy, and to weld To provide a chip polishing device capable of polishing without using force.

(Structure of the Invention) That is, in order to achieve this object, the TIJI polishing device for a welding gun of the present invention is provided with a rotating plate on the base, and a sliding member is provided on the rotating plate in a sliding manner. An angle changing cylinder for rotating the rotary plate at a predetermined angle is provided between the base and the rotary plate, and a slide cylinder arch for sliding the slide member is provided between the rotary plate and the slide member. A grinder having a cutting edge that matches the shape of the tip of the welding gun is fixed to the slide member.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

The tip number of this embodiment: Device A has a tip polishing hole 1 and an actuating device 2 for actuating the tip polishing IMt'&1 to a predetermined position.

The chip polishing machine 1 has a casing formed by a gripping case 3 and a gear case 4, an air motor 5 serving as a driving means is fixed inside the gripping case 3, and bevel gears 6.7 and i are installed inside the gear case 4. Certain speed gear 8, 9
A power transmission mechanism 1 ( ) consisting of a rotation mechanism 1 ( ) of a cutting blade 11 (transverse direction 12 ) is incorporated.

The rotation mechanism 12 has an upper mold cup 15 and a lower mold cup] (
3 is fixed, both ends of the cup shaft 17 are pivotally supported by the tip of the gear case 4, and a cup shaft 17 is fixed in the internal space of the cup shaft 17 in a direction perpendicular to the axial direction of the spur gear 13. The cutting blade 11 is pivotally supported, and a small bevel gear 19 is disposed in a side hole 18 formed in the spur gear 13.
is fixed to the support shaft 20 of the cutting blade 11, and the flat teeth 411
An annular bevel gear 21 centered on the axis Y of FIG.

Note that the n:i cutting blade 11 has both 111+1 large diameter portions 22.
22, the central small diameter portion 23, and the large diameter portion 22.22.
The tapers i'1ls24, 24 between the small diameter ina 23 and the small diameter ina 23 are formed coaxially, respectively, and the edge shape thereof is formed to match the shape of the tip of the welding gun. In addition, in this case, the center point P of the cutting edge 11 is set to be located at the intersection of the axis X of the support shaft 2 () and the axis Y of the flat ff1Jli, 13, and the center point P of the cutting edge 11 is set to be located at the intersection of the axis Upper and lower through holes 2 centered on the axis Y of the spur gear 13 are provided on both end faces.
S, 26 is formed, and the upper die tip 50 of the welding gun is polished by 4iJl with the cutting edge 11 through this upper through hole 25.
Also, the lower die tip 51 of the welding gun is inserted through the lower through hole 26.
will be polished with the cutting knife 11.

Therefore, the power from the air motor 5 is transferred to the power transmission mechanism 10.
The rotation is transmitted to the spur gear 13 of the gear 12, and as the spur gear 13 rotates, the cutting gear 11 rotates around the axis Y, and at the same time the rotation of the small bevel gear meshed with the annular bevel gear 21. Accordingly, the cutting blade 11 rotates around the axis X, and the cutting blade 1 rotates around the axis X and Y.
By the rotation of the tip 50.51, the tip surface of the tip 50.51 is rotated 4iJF 19r along the tip shape.

Next, in the actuating device 2, a rotary plate 33 is provided on a base 31 having legs 30 via a bearing 32, and the rotary plate 33 has a block 35.34 having a guide hole 34.34.
35 is fixed on the left and right, and the upper and lower plate members 36.3G
Frame 3 with left and right slide rods 37°37 installed between them
8, a slide plate 39 attached to the frame 38,
The slide member 4 () is configured with the slide member 40, and the slide member 40 blocks the slide rods 37, 37 with the blocks 35 and 35.
The rotary plate 33 is slidably fitted into the guide holes 34 and 34 of the rotary plate 33, and the rotary plate 33 is disposed between the base 31 and the rotary plate 33 at a predetermined position. The structure is such that an angle changing sill 41 for rotating the slide member 40 is provided, and a slide sill 42 for sliding the slide member 40 is provided between the rotary plate 33 and the slide portion 40.

Then-C1 By fixing the above-mentioned chip polishing machine l to the slide plate 39 of the actuating device 2, the chip (iJF It!i
Apparatus A is configured, and in this case, the direction 8 (eight line) of the upper mold tip 50 when the welding gun is open,
1. With the center point P of the cutting knife 11 positioned on the intersection with the direction (N line) of the shaped nap 51, the axis X passing through the center point P of the cutting knife 11 is aligned with the M line. The stroke of the angle changing cylinder 41 is set as the angle changing range of the cutting edge 1, which is the angle θ between the position where the axis X is perpendicular to the N line and the position where the axis X is perpendicular to the N line. The slide sill 42 has a distance equal to or greater than R1i from the state where the center point P of the cutting blade 11 is located on the intersection of the M line and the N line until the cutting blade 11 contacts the tip 50° 51. It is set to Stroke.

Therefore, when using the chip polishing apparatus of this embodiment, first, the upper die tip 50 and the lower die tip 5 of the welding force are
The center point P of the cutting edge 11 is located on the intersection of the direction and the direction of the cutting edge 1, and the axis IQX of the cutting edge 1 is located at the tip 50
．． The chip polishing device is installed so that it is perpendicular to the 1114 line and the N line, which are the directions of the cutting edge 11.
be the operating origin.

First, as the angle changing sill 41 operates to rotate the rotary plate 33, the direction h (M line) of one of the tips, for example, the upper tip 50, and the axis X of the blade 11 become perpendicular. Next, when the cutting knife 11 rotates with Air Morph 5, the same 0. f1 The slide sill 42 operates in the advancing direction from the operating origin, and the slide plate 39 slides against the rotary plate 33, and the cutting knife 11 comes into contact with the upper mold tip 50 through the through hole 25. In this state, the upper die chip 50 is polished by the cutting blade 11. Next, when the polishing is finished, the slide sill 42 moves backward to the operating origin, and the slide plate 3
As the blade 9 slides, the cutting blade 11 returns to its origin. Then, as the angle changing sill 41 operates in the opposite direction to rotate the rotary plate, the direction of the lower mold tip 51 (line N) and the axis X of the cutting knife 11 become perpendicular. Next, the slide sill 112 operates in the advancing direction from the operating origin, and the slide plate 39 slides against the rotary plate 33, and the cutting blade 11 comes into contact with the lower die nap 511 through the through hole 26. The lower mold tip 51 is polished by the cutting blade 11. Next, when the polishing is finished, the slide sill 42 moves backward to the operating origin, and as the slide plate 39 slides, the cutting knife 11 moves back to the operating origin. At this point, the 4Jl polishing work for both chips 5o and 51 is completed.

Although one embodiment of the present invention has been described above with reference to the drawings, the basic structure of the present invention is not limited to the above-described embodiment.

For example, the shape of the cutting edge only needs to match the shape of the chip, and it is not limited to a pincushion-shaped cutting blade as in the embodiment. A two-blade cutter with a rotating shaft structure or the like can be used.

Note that the chip polishing device of the present invention may be of a movable type, but for example, the chip polishing jS5 device of the present invention may also be used as a dedicated device for a welding robot on an automobile assembly line, etc. In this case, the chip polishing device of the present invention may be of a movable type. If the tip polishing device is fixed so that the operating origin coincides with the intersection of the orientations of both tips at the standby position of the robot welding gun, the polishing process will be included in the robot's operation cycle, and therefore the robot There is no need to take the trouble to stop the robot and polish the chip by 4 iJl (this is a suitable usage example as it improves the operating rate of the robot.

(Effects of the Invention) As explained above, according to the present invention, it is possible to set the direction of the cutting edge so that it becomes the surface 1u with respect to both chips and reps using the angle changing cylinder. Since the tip is polished by going in the same condition, it is possible to always polish the chip accurately and concentrically, and the polishing work can be done automatically, and the highly accurate TIJF8 can be used. be.

Also, since the upper die tip and the lower die tip are polished separately, unlike polishing using the pressure force of a welding gun, there is no need to adjust the pressure force every time you work. It is possible to improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a chip polishing apparatus according to an embodiment of the present invention;
Fig. 2 is a cross-sectional view of the chip polishing machine, and Fig. 3 is a cross-sectional view of the chip polishing machine.
Fig. 4 is a cross-sectional view of the cutting blade rotation structure in fJFiti, Fig. 4 is a plan view of the cutting blade rotation structure, and Fig. 5 is an explanatory diagram of the operation of the cutting blade. ; Cutting blade 31: Base 33: Rotating plate 40 Ni-Ride member 41: Angle changing cylinder 42 Ni-Ride cylinder A: Chip polishing device Patent applicant Nissan Shatai Co., Ltd. Agent Aya figure

Claims (1)

[Claims] 1) A rotating plate is provided on the base, a slide member is slidably provided on the rotating plate, an angle changing sill is provided between the base and the rotating plate for rotating the rotating plate at a predetermined angle, and A slide ring for sliding the slide member is provided between the rotary plate and the slide member,
A tip polishing device for a welding gun, characterized in that an I-1 polisher having a cutting edge matching the shape of the tip of the welding gun is fixed to the slide member.