CN201025036Y

CN201025036Y - Pick shape cutting tooth capable of recycling tooth cutting body

Info

Publication number: CN201025036Y
Application number: CNU2007200794266U
Authority: CN
Inventors: 徐晋勇; 高原; 黄伟; 恽志东
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2007-04-27
Filing date: 2007-04-27
Publication date: 2008-02-20
Anticipated expiration: 2017-04-27

Abstract

The utility model provides a pick shape cutting pick for repeatedly using the cutting pick body, which comprises a cutting pick head and a cutting pick body. The utility model is characterized in that the material of the cutting pick head is powder metallurgy high-speed steel; the cutting pick head takes a warhead shape and the center at the bottom of the cutting pick head is provided with a cavity which is matched with the convex part at the front end of the cutting pick body; the cavity is sleeved at the convex part at the front end of the cutting pick body. The middle part of the convex part of the cutting pick body and the cavity wall of the cutting pick head corresponding to the middle part are provided with corresponding pin holes; the pin holes are assembled together through a spring pin with gap. The pick shape cutting pick has the advantages that the powder metallurgy high-speed steel cutting pick head is characterized in high rigidity, good tenacity and abrasion resistance; the utility model has long service life; the powder metallurgy high-speed steel cutting pick head can be matched with different components so as to adapt the cutting requirements of different coal petrology intensities; the utility model has simple production art; the cutting pick head and the cutting pick body can get heat treatment respectively with good cutting pick performance; the cutting pick head can be conveniently and duly changed after being damaged; the cutting pick body can be used repeatedly.

Description

The pick-like bit of reusable pick body

Technical field:

The utility model relates to mining facility, the pick-like bit of definite a kind of reusable pick body of saying so.

Background technology:

Pick is to be used for brokenly the cutter that the rock coal breakage uses on the coal-winning machine, development machine, coal plough of cut coal petrography in the coal industry.At present, the pick that uses mainly contains two classes both at home and abroad, and cutter type and pick-like bit, its common feature all are tungsten carbide button's heads in pick front end centre bore, and hard alloy head adopts the method welding-on of soldering at cutter head body.During welding, to the violent heating of denticle head, can cause carbide alloy underbead crack hyperplasia, produce overheated structure, it is more crisp to make that the original just not high carbide alloy of toughness becomes, and further reduces its mechanical property.In addition, the pick material is structural alloy steel (35CrMnSi, 40CrNi, 42CrMo etc.), have higher comprehensive mechanical property, but its hardness and anti-wear performance are far away from carbide bit, in cut coal petrography process, relatively poor as the pick body that hard alloy head supports owing to anti-wear performance, be worn easily, make hard alloy head expose.Therefore, the pick by above-mentioned produced in conventional processes damages inefficacy usually in the following manner: 1. hard alloy head is hit brittle fracture easily takes place; 2. hard alloy head comes off; 3. the pick body weares and teares, fractures.Owing to above three kinds of abnormal wastes of pick, caused the huge waste of carbide alloy and steel, directly influence the efficient and the coal production cost of mining machinery.

The utility model content:

The purpose of this utility model is for overcoming the deficiencies in the prior art, a kind of pick-like bit of reusable pick body being provided.

The utility model comprises cutting pick head, pick body, unlike the prior art be: cutting pick head is made by PM HSS, it is bullet-headed that cutting pick head is, bottom centre is provided with an inner chamber that is complementary with pick body front end protuberance, the pick head cavity wraps the ledge of pick-like bit body front end, be matched in clearance between cutting pick head and the pick body, the middle part of pick body protuberance and pick head cavity wall are provided with corresponding pin-and-hole in the corresponding position with it, and pick body and cutting pick head are equipped by spring catch to be one.

Advantage of the present utility model is:

1. the PM HSS cutting pick head has hardness height, good toughness, anti abrasive characteristics, long service life;

2. the PM HSS cutting pick head can be carried out the proportioning of heterogeneity, to adapt to the requirement of different coal petrography intensity cuttings;

3. the pick manufacture craft is simple, and cutting pick head and pick body can be heat-treated respectively, and the pick overall performance is good;

4. can make things convenient in time after cutting pick head is damaged and change, the pick body is reusable.

Description of drawings:

Fig. 1 is the structural representation of the pick-like bit of the reusable pick body of the utility model.

The specific embodiment:

The utility model is by PM HSS cutting pick head 1, pick-like bit body 3 and spring catch 2 are formed, the bottom centre of cutting pick head 1 is provided with the inner chamber that is complementary with pick-like bit body 3 front end ledges, cutting pick head 1 is sleeved on the ledge of pick body 3 by matched in clearance, middle part and pick head cavity wall at pick body 1 protuberance are provided with corresponding pin-and-hole in the corresponding position with it, and the two is equipped with by spring catch 2 and is one.

Claims

1. the pick-like bit of reusable pick body, comprise cutting pick head (1), pick body (3), it is characterized in that: cutting pick head (1) is bullet-headed, its bottom centre is provided with the cavity that is complementary with pick body (3) ledge, the chamber cover of cutting pick head (1) wraps on the ledge of pick body (3) front end, is provided with corresponding pin-and-hole at cutting pick head (1) chamber wall and pick body (3) protuberance middle part, and cutting pick head (1) and pick body (3) are equipped with a gap by spring catch (2) and are one.

2. the pick-like bit of reusable pick body according to claim 1 is characterized in that: described cutting pick head (1) is made by PM HSS.

3. the pick-like bit of reusable pick body according to claim 1 is characterized in that: cutting pick head (1) is bullet-headed, wraps in the head of pick body outward.