JPH04356378A - Chip dresser device - Google Patents

Abstract

PURPOSE:To complete cutting work of a couple of welding chips provided to an opposed type spot welding gun at the same time. CONSTITUTION:Chip dressers D1 and D2 supported, respectively on a couple of base members 9 to slide along two linear rails 8 laid on a pedestal 5 are connected to each other by a cylinder 12 so as to be able to approach and separate each other. The respective chip dressers D1 and D2 are provided with cutting blades 22 to rotate by motors 18 and buffer members 26 made of annular elastic bodies abut on rear parts of the cutting blades 22. When the couple of welding chips T fitted to the welding gun G are pet at the chain line positions and the cylinder 12 is contracted, both chip dressers D1 and D2 approach each other and the corresponding welding chips T are cut by the cutting blades 22. At this time, loads which the cutting blades 22 receive from the welding chips T are absorbed by elastic deformations of the buffer members 26.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a tip dresser device for cutting off deteriorated tips of welding tips, and in particular, for cutting a pair of welding tips supported by a welding gun so that the tips of the tips face each other outward. The present invention relates to a chip dresser device for use in a chip dresser.

0002

BACKGROUND OF THE INVENTION Welding tips used for spot welding deteriorate due to repeated welding operations, so it is necessary to periodically cut the tips with a tip dresser to regenerate them.

Conventionally, in an opposed spot welding gun in which two welding tips are supported with their tips facing outward,
First, one welding tip is cut with a tip dresser, and then
The position of the tip dresser was moved to cut the other welding tip.

0004

[Problems to be Solved by the Invention] However, with the above conventional method, there is a problem that not only does it take a long time to cut two welding tips because it is not possible to cut two welding tips at the same time, but also it is necessary to move the position of the tip dresser. Because of this, there was a problem that the entire device became large.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a tip dresser device that can efficiently cut two welding tips of a facing spot welding gun.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a tip dresser device for cutting a pair of welding tips supported by a welding gun so that their tips face outward from each other. A pair of cutting blades capable of cutting the pair of welding tips, respectively, are attached to a pair of tip dressers, each of which is slidably supported on a stand and connected by an actuator that is extendable and retractable so as to approach and separate from each other. The first feature is that they are provided so as to face each other.

[0007] In addition to the above-mentioned first feature, the present invention also has the following features:
A second feature is that a buffer member made of an elastic body that can rotate together with the cutting blade is brought into contact with the back of the cutting blade, and the load that the cutting blade receives from the welding tip is received by the buffer member.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

1 to 3 show an embodiment of the present invention, in which FIG. 1 is an overall plan view of a chip dresser device, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG. It is a sectional view taken along line 3-3.

The chip dresser device includes a pedestal 5 in which four steel members 1 to 4 are combined and welded in a rectangular shape, and this pedestal 5 is horizontally supported on a fixed wall surface 6 via a support plate 7. A first chip dresser D1 and a second chip dresser D2 engage a linear block 10 provided on the bottom surface of the base member 9 to a pair of linear rails 8 laid on the upper surface of the two steel members 1 and 3 of the mount 5. They are slidably supported together. A cylinder 12 is supported on the lower surface of the base member 9 of the second tip dresser D2 via a bracket 11, and the tip of the rod 13 of the cylinder 12 is joined to a bracket 14 fixed to the lower surface of the first tip dresser D1. . Therefore, both tip dressers D1 and D2 can freely approach and separate from each other by expanding and contracting the cylinder 12, and the position where they are most separated is between the stoppers 15 provided on the steel materials 2 and 4 and the upper surface of the base member 9. Stopper 16
It is regulated by bringing them into contact with each other.

Since the first tip dresser D1 and the second tip dresser D2 have substantially the same structure, the structure will be described below in detail using the first tip dresser D1 as a representative.

A bracket 1 is provided on one side of the upper surface of the base member 9.
A motor 18 is supported via a motor 7, and a drive gear 19 provided on its output shaft meshes with an intermediate gear 21 inside a gear case 20, and the intermediate gear 21 further meshes with a driven gear 23 that supports a cutting blade 22 in the center. do. The driven gear 23 is the cutting blade 2
It is supported by the gear case 20 so as to be able to move slightly in the axial direction due to the load applied to the gear case 20. Each of the gear cases 20
An opening 201 is formed in the opposing surface of the welding gun G for allowing a pair of welding tips T provided in the opposing spot welding gun G to abut the corresponding cutting edges 22, respectively.

A bracket 2 is provided on the other side of the upper surface of the base member 9.
A cylindrical backup member 25 is provided via 4,
At the end of the backup member 25, an annular buffer member 26 made of a soft elastic material such as urethane is attached to the cutting edge 25.
It is placed so that it comes into contact with the back of the person. The buffer member 26 is supported by the backup member 25 via a ball bearing 27 so as to be able to rotate together with the cutting blade 22, and is prevented from falling off from the ball bearing 27 by a retainer 28 that engages with a retaining groove formed on the outer periphery.

Next, the operation of the embodiment of the present invention having the above-described configuration will be explained.

The cylinder 12 is extended to separate the first tip dresser D1 and the second tip dresser D2 from each other, and the stopper 16 provided on the base member 9 of both tip dressers D1 and D2 is connected to the stopper 15 provided on the pedestal 5. bring it into contact. Next, the opposed spot welding gun G is set in the middle position between both tip dressers D1 and D2, the two welding tips T are opposed to the opening 201 of the gear case 20, and the motor 18 is driven to rotate the cutting blade 22. let

When the cylinder 12 is contracted from this state,
Both tip dressers D1 and D2 approach each other, and each welding tip T is cut by coming into contact with the cutting blade 22 through the opening 201. At this time, for example, if the cutting blade 22 of the first tip dresser D1 comes into contact with one of the welding tips T first, as the cylinder 12 contracts, only the second tip dresser D2 approaches the first tip dresser D1. The cutting edge 22 of the second tip dresser D2 contacts the other welding tip T with a slight time delay. In this way, the pair of welding tips T are connected to the corresponding first and second tip dressers D1 and D2, respectively.
Cutting is performed by contacting the cutting edge 22 of 2 with uniform pressure. The load that the cutting blade 22 receives due to the contact of the welding tip T is absorbed by the elastic deformation of the buffer member 26 that supports the back of the cutting blade 22, thereby preventing excessive load from being applied to the cutting blade 22. .

When a predetermined period of time has elapsed after cutting of the welding tip T was started, the cylinder 12 is extended and both tip dressers D1 and D2 are separated from each other, and the motor 18 is stopped to stop the rotation of the cutting blade 22. is suspended.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small modifications may be made without departing from the scope of the invention described in the claims. Design changes are possible.

For example, a pair of chip dressers D1, D
The actuator for moving the two toward and away from each other is not limited to the cylinder 12, and other means such as a ball screw can be used. Further, the material of the buffer member 26 is not limited to urethane, and other suitable materials can be selected.

[0020]

As described above, according to the first feature of the present invention, the welding gun Since the pair of welding tips supported by the welding tips are individually cut by the cutting blades of each tip dresser, the cutting work that required two steps in the conventional tip dresser device can be completed in one step. Moreover,
Even if the welding gun inserted between both tip dressers is roughly positioned, the cutting edges of both tip dressers can be brought into contact with the corresponding welding tips with equal pressure, so the welding tips can be placed evenly. Cutting becomes possible.

According to the second feature of the present invention, the load that the cutting blade receives from the welding tip is absorbed by the elastic deformation of the buffer member that contacts the back of the cutting blade, so that an uneven load is applied to the cutting blade. This makes it possible to improve cutting accuracy and durability of the cutting edge.

[Brief explanation of drawings]

[Figure 1] Overall plan view of chip dresser device

[Figure 2] Figure 1
2-2 line sectional view of

[Figure 3] Cross-sectional view taken along line 3-3 in Figure 1

[Explanation of symbols]

5... Frame 12... Cylinder (actuator) 22... Cutting blade 26... Buffer member D1... First chip dresser (chip dresser) D
2...Second tip dresser (chip dresser) G.
...Opposed spot welding gun (welding gun) T...
welding tip

Claims (2)

[Claims] 1. A tip dresser device for cutting a pair of welding tips (T) supported by a welding gun (G) so that their tips face each other outward, each of which is slidable on a pedestal (5). A pair of tip dressers (D1, D2) that are freely supported and connected by an actuator (12) that can be extended and contracted so as to approach and separate from each other are provided with a pair of tip dressers that can respectively cut the pair of welding tips (T). Cutting blade (2
2) are provided so as to face each other,
Chip dresser equipment. [Claim 2] The cutting blade (22) is attached to the back of the cutting blade (22).
A buffer member (26) made of an elastic body that can rotate together with the welding tip (T) is brought into contact with the welding tip (T), and the load received by the cutting blade (22) from the welding tip (T) is received by the buffer member (26). Item 1. Chip dresser device according to item 1.