JPS5927977Y2 - Overlay welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overlay welding device mainly used for overlaying crankshafts and other rotating members to achieve balance.

Conventionally, this type of overlay welding was generally carried out by simply placing the tip of the welding torch opposite the outer circumferential surface of the workpiece, but in this method, positioning was troublesome and the overlay part did not sag. This tends to occur easily and is accompanied by other inconveniences such as spatter being more likely to scatter.

The purpose of the present invention is to obtain a device free of such inconveniences, and a hydraulic cylinder is connected to the tip of a welding torch 2 extending downward from a machine base 1 from a bracket 3 on the side of the welding torch 2. Left and right 1 that can be opened and closed with other drive members 4
A pair of clamp arms 5.5 is provided protrudingly, and the arms 5,5
A clamping part 15 that clamps the workpiece 6 between opposing surfaces of the tip of the torch 2, and a space 7 for overlaying that surrounds the tip of the torch 2 are formed above the clamping part 15.

In the one shown, an insulating plate 8 is fixed to the lower surface of the machine base 1, a welding torch 2 is attached to the front surface of the insulating plate 8, and a bracket 3 containing a cylinder serving as a driving member 4 is attached to the lower surface of the insulating plate 8, and a pair of left and right clamp arms are attached to the bracket 3. 5, 5 are mounted on the shaft 9 near the root.

The arms 5, 5 have their root ends 5a, 5a crossing each other and extending upward in a substantially square shape, and the rod 4a extending from the cylinder described above is exposed at the middle part thereof. According to forward movement, both arms5. '5 are pushed against the spring 10 and opened from the solid line position in FIG. 1 to the chain line position in the same figure.

Each arm 5, 5 is made of copper or other material with high thermal conductivity, and is provided with a cooling water passage 11 so as to be water-cooled, thereby eliminating the occurrence of thermal strain during welding.

The workpiece 6 consists of, for example, a crankshaft, the weight part of which is held between two arms 5.5, and a build-up 12 is applied to the upper surface of the workpiece 6, and the lower side of the opposing surface of the two arms 5, 5 is A skirt 1 surrounding the front and rear peripheries of the holding portion 15
3 is formed to prevent spatter from scattering on the lower side.

Incidentally, the gap 14 created between the opposing surfaces of the two arms 5, 5 in the closed position opens to the outside at a slight angle with respect to the axis, as clearly shown in FIG. I tried not to be guided.

To explain its operation, when the clamp arms 5, 5 are opened to each other, the workpiece 6, for example, the upper surface of the weight part of a crankshaft is brought to face the upper surface of the workpiece 6, and then closed, the workpiece 6 is clamped and positioned. At the same time, a space 7 for overlay is prepared above it surrounding the tip of the welding torch 2, and next, welding is started and an appropriate amount of overlay 12 is applied in the space 7. .

Next, both arms 5, 5 are opened to each other and separated from the workpiece 6, ready for the next operation.

In this way, according to the present invention, the left and right parts can be opened and closed mutually.
It is equipped with a pair of clamp arms 5, 5, and can freely clamp the workpiece 6 between the opposing surfaces of their tips, making positioning easy. A space 7 for overlaying is prepared.
The overlay 12 is formed in the space 7 and has the effect of preventing sagging and scattering of spatter.

[Brief explanation of drawings]

FIG. 1 is a front view of one example of the device of the present invention, FIG. 2 is a cut side view thereof, and FIG. 3 is a cutaway sectional view taken along the line Ill-III. 1...Machine base, 2...Welding torch, 3.
... Bracket, 4... Drive member, 5,
5... Clamp arm, 6... Workpiece, 7... Space for overlaying, 15... Clamping part.

Claims (1)

[Scope of utility model registration request] At the tip of the welding torch 2 extending downward from the machine base 1, a pair of left and right clamp arms 5, 5 protruding from a bracket 3 on the side of the welding torch 20, which can be opened and closed by a hydraulic cylinder or other drive member 4. A clamping part 15 that clamps the workpiece 6 between the opposing surfaces of the tip of the arm 5.5, and a space 7 for overlaying that surrounds the tip of the torch 2 are formed above the clamping part 15. Overlay welding equipment.