JPS5849198Y2 - Welding rod coated tip polishing roller - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a polishing roller that polishes the tip of a covered welding rod to expose the core wire to the surface.

Welding rods used for manual welding have a coating applied around the core wire to prevent oxidation of the welded part, but the core wire must be exposed at the rear end where it is held in a holder to conduct electricity. There is,
Furthermore, in order to enable arc generation at the start of welding, it is necessary to ensure that the core wire at the tip is exposed on the surface.

The coating coating machine that manufactures coated welding rods that can be used for applying pressure coats the entire welding rod core wire, including both ends, with coating coating. need to be scraped off.

Figure 1 shows the tip of a coated welding rod with a polished tip;
In the figure, 1 is a coating material, and 2 is a core wire.

The tip of the coating material 1 is polished to x45Q so that when the welding rod is brought into contact with the base material, the core wire comes into contact with the base material, making it possible to conduct electricity.

This tip polishing is performed by a polishing roller, and FIG. 2 shows the structure of a conventional polishing roller.

This roller 3 is an integral body made of carbon steel, and a toothed portion 3a extending in the width W direction is provided on its surface.

The outer circumferential surface of the roller is slightly tapered (indicated by d), and when the welding rod that contacts the rotating roller at right angles as shown in the figure rotates and moves in the direction of the arrow, the outer circumferential surface of the roller is tapered. A predetermined amount of polishing is performed by moving from a portion with a smaller diameter to a portion with a larger diameter.

When a polishing roller having such a structure is rotated at high speed to cut the tip of the coating material of the welding rod, the surface of the roller, that is, the toothed portion 3a comes into contact with the core wire of the tip, and the toothed portion is likely to wear.

The conventional roller is a one-piece piece made of carbon steel (JISS45C), and after being cast and having teeth formed on the surface 3,
Quench and harden.

At this time, the surface becomes oxidized and becomes rough, making it easy to chip and cause clogging during use.

Due to these factors, the polishing ability decreases relatively quickly, and the rollers usually have to be replaced after about 20 hours of operation.

The present invention was devised to eliminate such drawbacks, and its features include a bearing that fits into the drive shaft;
A main body consisting of a cylindrical part having a protruding part on one end edge and a flange part connecting these parts, and a cemented carbide body having teeth in the width direction of the circumferential surface and fitting onto the circumferential surface of the cylindrical part of the main body. A ring-shaped polishing member is screwed onto the other end edge of the cylindrical portion of the main body portion at one side edge, and a protrusion portion is provided on the other side edge to sandwich the polishing member together with the protrusion portion of the main body portion. It consists of a fixing metal fitting.

Next, the present invention will be explained in detail based on examples.

FIG. 3 shows an embodiment of the invention.

This polishing roller 3 consists of a bearing part 11 that fits into a drive shaft (not shown), a cylindrical part 12 having a protruding part 8 on one side edge, and a flange part 13 connecting these bearing part 11 and the cylindrical part 12. A main body part 10, a ring-shaped polishing member 5 having teeth flea on the circumferential surface, one side edge screwed into the other side edge of the cylindrical part 12 with a threaded part 4, and a protrusion part 9 on the other side edge. It consists of a fixing fitting 7 having a.

The polishing member 6 is made of cemented carbide (JIS H5501G3), which has a composition of tungsten W83-88, cobalt 07-10%, carbon C4-6, and also has a tapered surface.

To make such a polishing roller, a powdered material is placed in a mold and sintered, and the teeth 5a are finished polished.

The main body 10 and the fixture 7 are made of cast steel, which is a normal structural material, and are formed by casting or cutting into the shape shown.

The ring-shaped polishing member 5 is fitted on the outer peripheral surface of the cylindrical portion 12 of the main body portion 10, and the ring-1 on the other side edge of the cylindrical portion 12 is fitted.
Screw the screw thread on one side edge of the fixing fitting 7 into the polishing member 5.
is clamped and fixed between the protrusions 8 and 9.

The polishing roller 3 can be used for a long time because the polishing member that may come into contact with the core wire of the coated welding rod is made of cemented carbide and is extremely hard, and it will not clog during use. It has a durability of about 1,000 hours, which is 50 times that of conventional products.

Furthermore, since the polishing member 5 can be easily replaced by removing the fixing fittings, only the polishing member can be easily replaced when worn, which is economical.

Although cemented carbide has high hardness, it is also brittle, so in this invention, cemented carbide is used only for polished parts, and the main body etc. are cast with high mechanical strength, which makes it less susceptible to damage. be.

In addition, a carbide base metal is used for the polishing member, and after molding, only the teeth are finished and no quenching hardening is performed, so there is no problem of thermal oxidation, roughening, and brittleness of the tooth surface.Therefore, the tip of the welding rod is polished. The sharpness of the teeth can be maintained well, and high polishing ability can be maintained for a long time.

Next, a case will be described in which the highly durable polishing roller constructed as described above is attached to a welding rod manufacturing line and is actually operated.

FIGS. 4 to 6 are diagrams showing specific examples of a covered welding rod tip and rear end grinding device, and are a front view and a side view, respectively.

and a plan view.

In these figures, reference numeral 13 indicates a handle for vertically moving the accelerating belt 15, reference numeral 14 indicates its shaft, and reference numeral 19.20 indicates a pulley for driving the belt 15.

Reference numeral 25 indicates a beam member, and reference numeral 26 indicates a plurality of supports, and the shaft 14 is supported by the member 14a, and the endless belt 15 is supported by the member 14a.
Support on top.

The moving speed of the belt 15 is about 60'A, which is two to three times faster than the moving speed of the conveyor 16, which is 20 to 30%.

Therefore, the conveyor 16 was painted with a paint machine (not shown).
When the coated welding rod 7 carried by is caught between the conveyor 16 and the belt 15, it rotates to increase its moving speed, and when it leaves the belt 15, it stops rotating and moves at the same speed as the conveyor. .

Further, 18a and 18b are welding rods, puffs for removing the coating from a part of the holder, 20a and 20b are drive motors thereof, and 21a and 2
1b is a belt.

22 is a welding rod tip polishing roller, 23 is its drive motor,
24 is A/to.

27 and 28 are vertically moving bundles of puffs 18a and 18b;
29 is a puff back and forth moving bundle.

The purpose of moving the puff back and forth is to accommodate the long and short welding rods available.

To explain the operation, when the welding rod 7 moves on the conveyor 16 and enters the device, it is sandwiched from the top by the sponge-like belt 15, and the welding rod 7 rotates as it passes through the puff 1.
8a, 18b, and the polishing roller 22.

The upper and lower puffs 18a and 18b are attached to the belt 21a,
Motor 20a via 21b.

The puff consisting of a wire brush removes the coating from the welding rod holder.

The leading polishing roller 22 is rotated by a motor 23 via a belt 24, and when the coated welding rod 7 passes while rotating in the positional relationship shown in FIG.
As shown in the figure, it is cut at an angle of M45°.

As explained in detail above, according to the present invention, the surface of the grinding roller has excellent abrasion resistance and is highly durable, so only the broken grinding member can be replaced, so the manufacturing cost of the roller is itself Although it is slightly more expensive, it has a longer usable time than conventional products, so it is ultimately much more economical than conventional products, and its value is extremely high.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing the tip of the welding rod, Fig. 2 is a conventional polishing roller, A is a longitudinal sectional view, B is an enlarged view of its teeth, and Fig. 3 is an embodiment of the present invention. A is a vertical cross-sectional view, B
4 is an enlarged view of the teeth, and FIGS. 4 to 6 are front views showing examples of application of the device of the present invention. They are a side view and a plan view. In the figure, 5 is a ring-shaped polishing member, 7 is a fixed goldfish 8, 9 is a protruding part, 10 is a main body part, 11 is a bearing part, 12 is a cylindrical part,
13 is a flange portion, and 5a is a tooth portion.

Claims (1)

[Scope of utility model registration request] A main body consisting of a bearing part that fits into the drive shaft, a cylindrical part having a protrusion on one end edge, and a flange part connecting these parts, and a peripheral surface of the cylindrical part of the main body, which has teeth in the width direction of the curved surface. A ring-shaped abrasive member made of cemented carbide that fits into the cylindrical part of the main body part, one side edge of which is threadedly engaged with the other end edge of the cylindrical part of the main body part, and a protrusion part provided on the other end edge of the said protrusion part of the main body part. A coating tip polishing roller for a welding rod, characterized in that the roller comprises a fixing fitting that clamps the polishing member together with the polishing member.