CN211200536U

CN211200536U - Hard alloy tooth

Info

Publication number: CN211200536U
Application number: CN201920416097.2U
Authority: CN
Inventors: 朱坤
Original assignee: Zigong Cemented Carbide Co Ltd
Current assignee: Zigong Cemented Carbide Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-08-07
Anticipated expiration: 2029-03-29

Abstract

The utility model provides a carbide tooth, include the tooth body and set up in the prong of tooth body upper end, the outside circumference equipartition of tooth body is a plurality of beads that extend to upper portion along the lower part of tooth body. The hard alloy tooth provided by the utility model has the advantages that the convex edge is arranged outside the tooth body, so that raw materials are saved, and the convex edge is pressed against the inner wall of the welding hole of the cutting tooth base body when the hard alloy tooth is arranged on the cutting tooth base body, so that the hard alloy tooth and the welding hole are automatically centered, the width of the welding seam is ensured to be uniform and controllable, and the brazing firmness is improved; the tooth body is further designed into a circular truncated cone shape with a large radius of the upper bottom surface and a small radius of the lower bottom surface, so that when the tooth body is used for mining, tunneling, rotary drilling, milling and planing by an excavator, ditch excavation and pavement milling and planing, a cutting pick matrix at the lower end of the tooth body can be protected, and the hard alloy tooth can be prevented from falling off after the cutting pick matrix and a welding part are abraded.

Description

Hard alloy tooth

Technical Field

The utility model belongs to the technical field of the toper pick, concretely relates to carbide tooth.

Background

The conical cutting pick is widely applied to the fields of mining, tunneling, rotary drilling, excavator milling, ditch excavation, pavement milling, regeneration and the like. The conical cutting pick mainly comprises a cutting pick base body and a hard alloy tooth brazed on the cutting pick base body, wherein a welding hole with the size slightly larger than the welding position of the hard alloy tooth is arranged on the cutting pick base body, the hard alloy tooth is embedded in the welding hole during welding, a gap formed between the hard alloy tooth and the inner wall of the welding hole is a welding line, high-temperature molten brazing filler metal is injected into the welding line, and the hard alloy tooth is welded on the cutting pick base body after the brazing filler metal is cooled and solidified. Because the size of a welding hole is slightly larger than a hard tooth, the position of the hard alloy tooth is easy to shake during welding, the hard alloy tooth is difficult to be accurately brazed in the middle of the welding hole, the problem of uneven thickness of a welding seam is caused, the use of the cutting tooth is influenced, the size of the welding seam is not too large for accurate brazing, the fluidity of brazing filler metal at high temperature is poor, the brazing filler metal is rapidly solidified, the brazing filler metal melted at high temperature is difficult to completely fill the welding seam due to too small welding seam, the hard alloy tooth is difficult to be firmly brazed on a cutting tooth base body, in addition, the welding part of the existing hard alloy tooth usually adopts a cylindrical structure, when a steel body outside the hard alloy tooth is abraded, the cutting tooth base body is abraded, the welding part between the hard alloy tooth and the cutting tooth base body is also easily abraded, the hard alloy tooth is caused to.

SUMMERY OF THE UTILITY MODEL

Based on the above problem, an object of the utility model is to provide a carbide tooth, it has the advantage of easily brazing, is difficult for droing during the use.

In order to realize the above purpose, the utility model discloses a technical scheme be: the utility model provides a carbide tooth, includes tooth body and sets up in the prong of tooth body upper end, the outside circumference equipartition of tooth body is a plurality of edges extending to upper portion along the lower part of tooth body.

The utility model provides a carbide tooth, before the use, install it on the pick base member, the top of pick base member has the welding hole, inlay the carbide tooth in the welding hole through the tooth body, the peripheral bead of tooth body supports on the welding hole inner wall, thereby make the tooth body outside and weld between the hole and form the even welding seam of width, thereby the brazing filler metal melts the back and fills between tooth body and welding hole along the welding seam flow, treat that the brazing filler metal solidifies the back and be about to tooth body and weld the jogged joint, thereby braze the carbide tooth on the pick base member.

The tooth body is in a circular truncated cone shape with a large upper bottom surface diameter and a small lower bottom surface diameter, and the tooth tip is arranged on the upper bottom surface of the tooth body, so that when the tooth body is used for mining, tunneling, rotary drilling, excavator milling, ditch excavation and pavement milling, the welding part of the lower end of the tooth body and the cutting pick matrix can be protected from being abraded due to the fact that the base table is in the circular truncated cone shape with the large upper bottom surface radius and the small lower bottom surface radius, and the hard alloy tooth can be prevented from falling off after the cutting pick matrix and the welding part are abraded; further, the convex edge extends along the generatrix of the tooth body; optimally, the included angle between the generatrix of the tooth body and the axis is 5-20 degrees.

Preferably, the main body of the tooth tip is a cone, and the top of the tooth tip is a spherical surface.

Optimally, the height of the convex edge is 0.1-0.3 mm, and correspondingly, the width of the welding seam is 0.1-0.3 mm.

Preferably, the cross section of the convex rib is arc-shaped, and the shape is convenient to process.

Preferably, the number of the ribs is more than 2, and preferably, the number of the ribs is 3.

Preferably, the lower end of the tooth body is a frustum-shaped bottom part with the cross sectional area decreasing along the direction of the axis from the upper bottom surface to the lower bottom surface.

The utility model has the advantages that:

the hard alloy tooth provided by the utility model has the advantages that the convex edge is arranged outside the tooth body, so that raw materials are saved, and the convex edge is pressed against the inner wall of the welding hole of the cutting tooth base body when the hard alloy tooth is arranged on the cutting tooth base body, so that the hard alloy tooth and the welding hole are automatically centered, the width of the welding seam is ensured to be uniform and controllable, and the brazing firmness is improved; the tooth body is further designed into a circular truncated cone shape with a large radius of the upper bottom surface and a small radius of the lower bottom surface, so that when the tooth body is used for mining, tunneling, rotary drilling, milling and planing by an excavator, ditch excavation and pavement milling and planing, a cutting pick matrix at the lower end of the tooth body can be protected, and the hard alloy tooth can be prevented from falling off after the cutting pick matrix and a welding part are abraded.

Drawings

Fig. 1 is a schematic view of a cemented carbide tooth provided by the present invention;

FIG. 2 is a top view of a cemented carbide tooth according to an embodiment;

FIG. 3 is an enlarged view of the point A in FIG. 2;

FIG. 4 is a schematic view of the mounting of a carbide tooth to a pick body;

wherein, 1 is the pick body, 2 is the prong, 3 is the bead, 4 is the pick base member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

As shown in fig. 1 and 2, the present embodiment provides a cemented carbide tooth, including a tooth body 1 and a tooth tip 2, where the tooth body 1 is a circular truncated cone with a large diameter at an upper bottom surface and a small diameter at a lower bottom surface, the tooth tip 2 is integrally disposed on the upper bottom surface of the tooth body 1, a main body of the tooth tip 2 is conical, a top portion of the tooth tip is a spherical surface, and a lower end of the tooth body 1 is a frustum-shaped bottom portion whose cross-sectional area decreases progressively along a direction in which an axis of the tooth body points from the upper bottom surface to the; wherein, a plurality of beads 3 that extend along the generating line of tooth body 1 are evenly distributed to tooth body 1 outside circumference, as shown in fig. 3, the cross section of bead 3 is circular arc.

When the hard alloy tooth soldering machine is used, as shown in fig. 4, the hard alloy tooth is installed on a cutting pick base body 4, a welding hole is formed in the top of the cutting pick base body 4, the hard alloy tooth is embedded in the welding hole through a tooth body 1, the convex edge 3 on the periphery of the tooth body 1 abuts against the inner wall of the welding hole, a welding seam with uniform width is formed between the outer portion of a base platform and the welding hole, brazing filler metal flows along the welding seam after being melted and is filled between the base platform and the welding hole, the tooth body 1 is connected with the welding hole after the brazing filler metal is solidified, the hard alloy tooth is soldered on the cutting pick base body 4, and when the hard alloy tooth soldering machine is used for mining, tunneling, rotary drilling, milling and digging, ditch excavation and pavement milling, the cutting pick base body 4 at the lower end of the tooth body 1 can be protected, and the hard alloy tooth can be prevented from falling off after the cutting pick base.

The above embodiments of the present invention are merely examples for illustrating the present invention and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes or variations which are introduced by the technical solution of the present invention are still within the scope of the present invention.

Claims

1. The utility model provides a carbide tooth, includes tooth body (1) and sets up prong (2) in tooth body (1) upper end, its characterized in that, tooth body (1) outside circumference equipartition a plurality of edges tooth body's lower part to upper portion extending's bead (3).

2. The cemented carbide tooth according to claim 1, characterized in that the tooth body (1) is a truncated cone with a large diameter at the upper bottom and a small diameter at the lower bottom, and the tooth tip (2) is provided at the upper bottom of the tooth body (1).

3. A cemented carbide tooth according to claim 2, characterized in that the ridge (3) extends along a generatrix of the tooth body (1).

4. A cemented carbide tooth according to claim 2, characterized in that the generatrix of the tooth body (1) forms an angle of 5 ° to 20 ° with the axis.

5. A cemented carbide tooth according to any one of claims 1 to 4, characterized in that the tip (2) body is conical and the tip (2) top is spherical.

6. A cemented carbide tooth according to any one of claims 1 to 4, characterized in that the height of the ridge (3) is 0.1-0.3 mm.

7. A cemented carbide tooth according to any one of claims 1 to 4, characterised in that the cross-section of the ridge is circular.

8. A cemented carbide tooth according to any one of claims 1 to 4, characterized in that the number of ridges (3) is 2 or more.

9. A cemented carbide tooth according to claim 8, characterized in that the number of ridges (3) is 3.

10. A cemented carbide tooth according to any one of claims 1 to 4, wherein the lower end of the tooth body is a frustoconical bottom portion having a cross-sectional area decreasing along its axis in a direction from the upper bottom surface to the lower bottom surface.