CN211666711U

CN211666711U - Bimetal composite cutting pick

Info

Publication number: CN211666711U
Application number: CN202020163778.5U
Authority: CN
Inventors: 张黎科; 刘朋飞; 康文杰
Original assignee: Shaodong Intelligent Manufacturing Innovative Institute
Current assignee: Shaodong Intelligent Manufacturing Innovative Institute
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2020-10-13
Anticipated expiration: 2030-02-12

Abstract

The utility model provides a bimetal composite pick, including first base member and second base member, first base member sets to cylindrically, the second base member is conical head and is the columniform axial region including setting up, the head with an organic whole of axial region sets up, first base member coaxial shaft sets up inside the second base member, the material of first base member is the deformed steel bar, the material of second base member is 42 CrMo. The utility model discloses a bimetal composite pick has that the operation surface is hard wear-resisting, the good characteristics of coupling part toughness, simple manufacture simultaneously, and the cost is on the low side, can improve the production efficiency of excavating, mining, reduction in production cost.

Description

Bimetal composite cutting pick

Technical Field

The utility model relates to a pick technical field, in particular to bimetal composite pick.

Background

When mechanical equipment such as a heading machine and a coal mining machine works, cutting teeth need to be additionally arranged on a working part of the equipment. The cutting pick is an important part for cutting coal and rock of mining machinery, and is divided into a coal cutting pick, a heading machine cutting pick, a rotary excavating machine cutting pick and the like according to different use working conditions, and is divided into a flat cutting pick, a conical cutting pick, a radial cutting pick, a tangential cutting pick and the like according to different cutting picks in different shapes. When the cutting pick works, the working surface of the cutting pick is in direct contact with hard materials such as rocks, ores and the like, high pressure stress, shear stress and impact load are borne, the cutting pick is very seriously abraded and is a part with high consumption, and the working efficiency and the production cost of excavation, mining and the like are influenced due to frequent failure and replacement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a bimetal complex, cast fashioned pick, the cost is on the low side, and intensity is higher to improve the production efficiency of excavating, mining, reduction in production cost.

In order to achieve the aim, the utility model provides a bimetal composite cutting pick, including first base member and second base member, first base member sets to cylindrically, the second base member is conical head and is columniform axial region including setting up, the head with the axial region is integrative to be set up, first base member coaxial sets up inside the second base member, the material of first base member is the deformed steel bar, the material of second base member is 42 CrMo.

Further, the first base body and the second base body are connected into a whole in a casting mode.

Preferably, the maximum outer diameter of the head of the second base body is 54 to 60mm, and the minimum outer diameter is 26 to 30 mm. The outer diameter of the second base shaft portion is 36-40 mm. The outer diameter of the first substrate is 14-16 mm.

Further, the length of the second substrate is greater than the length of the first substrate, i.e., the first substrate is not disposed through the second substrate. Preferably, the length of the second substrate is 120mm, and the length of the first substrate is 90 mm.

Further, the bottom end of the head part also comprises a section of cylindrical step, and the thickness of the step is 15-17 mm.

The above technical scheme of the utility model has following beneficial effect:

the utility model discloses a bimetal composite pick through the fashioned mode of casting, makes the pick with two kinds of metal material complex, and the coefficient of thermal expansion of having considered two kinds of metals, solidification shrinkage factor and linear shrinkage factor are close, and has considered the influence of follow-up heat treatment temperature to two kinds of materials, and the bimetal composite pick of making has that the operation surface is hard wear-resisting, the good characteristics of coupling part toughness, simple manufacture simultaneously, and the cost is on the low side, can improve the production efficiency who excavates, mines, reduction in production cost.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

fig. 2 is a top view of the present invention.

[ description of reference ]

1-a first substrate; 2-a second substrate; 3-a head; 4-shaft part; 5-step.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the embodiment of the utility model provides a bimetal composite cutting pick, which comprises a first base body 1 and a second base body 2, wherein the first base body 1 is arranged into a cylinder shape, and the second base body 2 comprises a conical head part 3 and a cylindrical shaft part 4. The head part 3 and the shaft part 4 are arranged into an integral structure, the first base body 1 is coaxially arranged inside the second base body 2, the first base body 1 is made of deformed steel bar, the second base body 2 is made of 42CrMo, and the first base body 1 and the second base body 2 are connected into a whole in a casting mode.

Due to the working characteristics of the cutting pick, the thermal expansion coefficient, the solidification shrinkage rate and the linear shrinkage rate of two metals are required to be considered to be similar in the process of selecting the bimetal, and the influence of the subsequent heat treatment temperature on the two materials is also required to be considered. Therefore, the cutting pick product is compositely cast by selecting the deformed steel bar and the 42CrMo, the contraction coefficients of the two materials are similar, larger internal stress cannot be formed in the solidification process and the subsequent heat treatment process, and the influence of cracks in the casting on interface combination is avoided. Considering that the structure of the high-chromium cast iron after heat treatment is a martensite matrix + carbide, the matrix and the carbide have high hardness and good wear resistance, but have high brittleness, and the structure of the high-chromium cast iron after heat treatment is a martensite structure, has certain wear resistance and simultaneously keeps good plasticity and toughness.

Preferably, the maximum outer diameter of the head of the second base body 2 is 54 to 60mm, and the minimum outer diameter is 26 to 30 mm. The outer diameter of the shaft portion 4 of the second base body 2 is 36-40 mm. The outer diameter of the first substrate 1 is 14-16 mm.

Meanwhile, the length of the second substrate 2 is greater than that of the first substrate 1, that is, the first substrate 1 does not penetrate through the second substrate 2, so that the head 3 of the second substrate 2, the end face of which is the main working surface, is made of 42CrMo, and the part, which is formed by the first substrate 1 and the shaft 4 of the second substrate 2, and is used for connection and installation is made of a composite material. Preferably, the length of the second substrate 2 is 120mm and the length of the first substrate 1 is 90 mm.

Further, the bottom end of the head part 3 further comprises a section of cylindrical step 5, the thickness of the step 5 is 15-17mm, and the step is mainly used for limiting the installation position of cutting teeth.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The bimetal composite cutting pick is characterized by comprising a first base body and a second base body, wherein the first base body is cylindrical, the second base body comprises a conical head portion and a cylindrical shaft portion, the head portion and the shaft portion are integrally arranged, the first base body is coaxially arranged inside the second base body, the first base body is made of deformed steel bar, and the second base body is made of 42 CrMo.

2. The bimetallic composite pick of claim 1, wherein the first and second substrates are integrally connected by casting.

3. The bimetallic composite pick of claim 1, wherein the second body head has a maximum outer diameter of 54-60mm and a minimum outer diameter of 26-30 mm.

4. The bimetallic composite pick of claim 3, wherein the second base shaft portion has an outer diameter of 36-40 mm.

5. The bimetallic composite pick of claim 4, wherein the first substrate has an outer diameter of 14-16 mm.

6. The bimetallic composite pick of claim 1, wherein the length of the second substrate is greater than the length of the first substrate, i.e., the first substrate is not disposed through the second substrate.

7. The bimetallic composite pick of claim 1, wherein the second substrate has a length of 120mm and the first substrate has a length of 90 mm.

8. The bimetallic composite pick of claim 1, wherein the bottom end of the head further comprises a cylindrical step having a thickness of 15-17 mm.