JP2535369Y2 - Electrode tip polishing machine for spot welding machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode tip polishing apparatus for a spot welding machine.

[0002]

2. Description of the Related Art As a conventional electrode tip polishing apparatus of a point welding machine, a polishing piece having a conical concave surface on both front and rear surfaces and a plurality of notched grooves formed radially on the concave surface is rotated. There has been proposed a polishing apparatus for performing the polishing (see Japanese Utility Model Publication No. 3-18068).

However, in the conventional polishing apparatus, since the electrode tip is rotationally polished by radially formed notch grooves, the tip portion of the electrode tip cannot be polished smoothly, and the surface is easily undulated. There is a problem that it is difficult to maintain the nugget diameter. As a result, good spot welding may not be performed. Further, during polishing of the electrode tip, the notch groove portion of the polishing piece may bite into the surface of the electrode chip and chip.
Therefore, there is also a problem that the abrasive piece needs to be replaced early.

[0004]

Therefore, the present invention has been made in view of the above-mentioned point, and it is possible to satisfactorily polish the tip diameter portion of the electrode tip and to smoothly grind the surface to maintain the nugget diameter. An object of the present invention is to provide an electrode tip polishing apparatus for a point welding machine which has excellent durability.

[0005]

According to the present invention, there is provided an electrode tip polishing apparatus for a spot welding machine having a main body having a rotary abrasive body and a driving section for rotating the rotary abrasive body. , front and back sides of both sides with diamond electrodeposited layer is formed on the curved surface of the pulley or sprocket which is curved inward, the diamond electrodeposited layer of the both curved surfaces
A rotating abrasive body having a plurality of polishing waste discharge holes formed therethrough is rotatably attached to an opening window at the front of the main body frame,
A drive pulley or a sprocket is rotatably mounted on the rear side of the main body frame, and a drive belt or a chain is stretched between the pulleys or the sprockets. The present invention relates to an electrode tip polishing apparatus for a spot welding machine, comprising a drive motor having a drive shaft inserted and fixed to the center of a pulley or a sprocket.

[0006]

In the electrode tip polishing apparatus of the point welding machine according to the present invention, the driving pulley or sprocket rotates by the rotation of the driving shaft of the driving motor, and the driving pulley or sprocket rotates through the driving belt or chain. The rotating abrasive body on the front side of the main body rotates. Then, the surface of the electrode tip pressed by the diamond electrodeposition layer on the front side and the back side of the rotating abrasive body is polished. At this time, since the surface of the rotary polishing body is made of a diamond electrodeposited layer and has no notched groove, the surface of the tip portion of the electrode tip can be polished smoothly.
In addition, there is no possibility that the diamond electrodeposition layer may break into the surface of the electrode chip to be damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a partial cross-sectional side view of a main part of an electrode chip polishing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view showing an attached state of the electrode chip polishing apparatus, and FIG. FIG. 3 is a plan view of the turning device.

[0008] The electrode tip polishing apparatus 10 of this embodiment comprises:
It comprises a main body section 20, a drive section 60, and a turning device 70. The main body section 20 includes a main body frame 22 and a rotating abrasive body 3.
2, a driving pulley 50, and a driving belt 48.
The main body frame 22 is formed by combining two frame halves 24 and 25 into a substantially rectangular plate shape.
The frame halves 24 and 25 are provided with the main frame 2 at the front thereof.
2 are formed on the rear side of the frame halves 24 and 25, and circular concave portions 28 and 29 are formed on the mating surface 23 on the rear side. It is open on the outer surface of the body 24. Further, a passage 30 communicating the opening windows 26 and 27 and the recesses 28 and 29 is formed in the mating surface 23 of the frame halves 24 and 25. Reference numeral 31 denotes a plate for attaching to a swing device 70 described later.

In the rotary abrasive body 32, diamond electrodeposition layers 36, 37 are provided on the curved surface of a pulley 34 whose both front and rear sides are curved in a substantially bowl shape inside, and the diamond electrodeposition layers 36, 37 on both sides thereof are provided. Abrasive waste discharge hole 38 penetrating between 37
Are formed. The diamond electrodeposition layer 36,
37 is mesh # 60 to # 100 (about 200 to
(330 μ) of diamond particles are preferably electrodeposited by a known method. The polishing waste discharge hole 38 is preferably constituted by a large-diameter hole 39 provided at the center of the curved surface of the rotary abrasive body 32 and a small-diameter hole 40 provided radially around the hole 39.

[0010] The rotary abrasive body 32 is
Bearings 42, 43 are provided in opening windows 26, 27 on the front side of
It is rotatably mounted via. 44, 46
Is a collar for preventing the drive belt 48 from coming off.

The drive pulley 50 has a drive shaft 66 of a drive motor, which will be described later, inserted through and fixed to the center of the main body frame 2.
2 It is rotatably mounted in the recesses 28 and 29 on the rear side. The driving belt 48 is for transmitting the driving force of the driving motor to the rotary polishing body 32, and is stretched between the rotary polishing body 32 and the driving pulley 50 to
Located within the passage 30. When a chain is used instead of the driving belt 48, the pulley 34 and the driving pulley 50 of the rotary abrasive body 32 are sprockets.

The drive section 60 comprises a case 62 mounted on the outer surface of the frame half 24, and a drive motor 64 housed inside the case 62. A drive shaft 66 of the drive motor 64 is connected to the drive pulley. It is inserted and fixed to the center part of 50. As the driving motor 64, an air motor or an electric motor is used. The rotation speed of the drive shaft 66 is 140
00-16000 rpm is preferable.

The turning device 70 is for turning the rotary polishing body 32 of the main body 20 in parallel with the rotation surface of the rotary polishing body 32 to efficiently polish the electrode chip surface. The turning device 70 includes a support plate 72, three gears 74, 76, 78, and a turning plate 80.

The support plate 72 has a rear portion bent downward, and a bent portion 86 of the support plate 72 is rotatably mounted on the distal ends of arms 83 and 84 to be described later, and is attached to a column 79 for supporting an electrode chip polishing apparatus. . On the tip side of the support plate 72, three gears 74, 76, 78 are rotatably meshed and linearly arranged. The gears 74, 78 at both ends have protruding shafts 75, 77 formed on the surface opposite to the support plate 72 at eccentric positions away from the rotation centers of the gears 74, 78. A gear rotation drive motor 81 is attached to the end gear 78. On the other hand, the turning plate 80 is formed with holes 82 and 83 at positions corresponding to the protruding shafts 75 and 77 of the gears.
83, the protruding shafts 75, 77 of the gears are inserted.
It is adapted to make a revolving motion by the rotation of 6,78.
The main body 20 is attached to the tip side of the revolving plate 80 via the attachment plate 31.

The rear bent portion 8 of the support plate 72
Arms 83, 84 pivotally mounted on the upper and lower sides of 6 are rotatably mounted on a column 79, and a weight 87 for horizontally holding the support plate 72 is suspended from the rear end of the arm 84. . It is to be noted that reference numerals 88 and 89 denote diamond electrodeposited layers 36 and
A spring for adjusting the amount of polishing by adjusting the pressing force of the electrode chip surface by 37.

The electrode tip polishing apparatus 1 thus constructed
0 indicates that the drive pulley 50 is driven by the drive motor 64.
The rotating abrasive body 32 is rotated via the driving belt 48 and the diamond electrodeposition layer 3 on both sides of the rotating abrasive body 32.
The surface of the electrode tip 90 pressed by 6, 37 is polished.
At this time, the turning device 70 supporting the main body 20 of the electrode tip polishing device 10 rotates the gears 74, 76, 78 by driving the gear rotation drive motor 81, and biases the gears 74, 78 at both ends thereof. The pivoting plate 80 attached centered and the main body 20 of the electrode tip polishing apparatus 10 attached to the front end of the pivoting plate 80 are pivoted. Thereby, the rotary abrasive body 32 in the main body 20 also turns similarly, and the electrode tip 90 in contact with the rotary abrasive body 32 is efficiently and uniformly polished. Note that the polishing chips of the electrode tip 90 are removed from the polishing chip discharge holes 3 formed in the rotary polishing body 32.
8, the diamond electrodeposition layer 76 of the rotary polishing body 32,
78 Removed from the surface and does not interfere with polishing.

Although the above embodiment has been described with reference to a case in which a swivel device is provided, a device without a swivel device may be used.

[0018]

As shown and described above, according to the electrode tip polishing apparatus of the present invention, it is possible to polish the tip diameter portion of the electrode tip satisfactorily and to smoothly polish the surface to maintain the nugget diameter. In addition, there is an effect that the rotating abrasive body is not damaged during the polishing and the durability is excellent. In addition, by attaching the electrode tip polishing apparatus of the present invention to a turning device, the electrode tip surface can be more efficiently and uniformly polished.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a main part of an electrode tip polishing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of the embodiment.

FIG. 3 is a side view showing a state where the electrode tip polishing apparatus of the embodiment is attached to a column.

FIG. 4 is a plan view of the turning device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 electrode chip polishing apparatus 20 main body 22 main body frame 26 opening window 27 opening window 32 rotating polishing body 34 pulley 36 diamond electrodeposition layer 37 diamond electrodeposition layer 38 polishing dust discharge hole 48 driving belt 50 driving pulley 60 driving section 64 Drive motor 66 Drive shaft of drive motor 70 Swivel device 90 Electrode chip

Claims (2)

(57) [Scope of request for utility model registration] 1. An electrode tip polishing apparatus for a point welder having a main body having a rotary abrasive body and a drive section for rotating the rotary abrasive body, wherein the main body has both front and rear surfaces inside. A diamond electrodeposition layer is formed on the curved surface of the pulley or sprocket curved to form a diamond electrodeposition layer on both curved surfaces.
A rotating abrasive body with a plurality of polishing dust discharge holes formed therethrough ,
A driving pulley or a sprocket is rotatably mounted on the rear side of the main body frame, and a driving belt or chain is stretched between the pulleys or the sprockets. Wherein the drive section has a drive motor having a drive shaft inserted and fixed to the center of a drive pulley or sprocket in the main body section. The electrode tip polishing apparatus for a spot welder. 2. A tip welding machine according to claim 1, wherein a turning device for turning the main body in parallel with the rotating surface of the rotary abrasive body is attached to a rear side of the main body. apparatus.