CN201300370Y

CN201300370Y - PCD grinding wheel

Info

Publication number: CN201300370Y
Application number: CNU200820227668XU
Authority: CN
Inventors: 李树峰; 李建民; 崔学彬; 李伟
Original assignee: Hebei Husqvarna Jikai Diamond Tools Co Ltd
Current assignee: Hebei Husqvarna Jikai Diamond Tools Co Ltd
Priority date: 2008-12-04
Filing date: 2008-12-04
Publication date: 2009-09-02
Anticipated expiration: 2018-12-04

Abstract

The utility model discloses a PCD grinding wheel for grinding and processing various fragile materials such as stone, and comprises a dished basal body and a cutter head which is fixed above the basal body and made of PCD material. A chute is arranged above the basal body, the cutter head is fixed in the chute and is arranged higher than a plane of the basal body, the chute is of a reversed V shape which is wide at one side and narrow at the other side and has a right angle as a base angle, the cutter head is welded in the chute, a composite bed of the cutter head is arranged towards the outside of the chute, and the bottom face of the cutter head is propped up to a short face of the V-shaped chute. The PCD grinding wheel overcomes the defect that the ordinary grinding wheel only relies on the cutter head and a welding face of the basal body to bear the shearing force, which largely increases the connecting intensity between the cutter head and the basal body and solves the problem that the ordinary grinding wheel is easy to loose the cutter head, the PCD cutter head has good resistance to abrasion and heat conductivity, reduces the thermal deformation and grinding resistance of the grinding wheel when in working state, and enhances the sharp degree and service life of the grinding wheel.

Description

A kind of PCD emery wheel

Technical field

The utility model relates to a kind of instrument of grinding class, refers in particular to a kind of diamond-impregnated wheel, and it is widely used in the grinding to various fragile materials such as stone materials.

Background technology

During to the grinding of fragile materials such as stone material, often use a kind of diamond-impregnated wheel as grinding tool.The cutter head of the grinding tool of existing diamond composition class generally all is to be mixed after Thermocompressed sintering and forming by diamond particles and metal dust, and mostly cutter head is to be welded on the plane of a metallic matrix through high-frequency heating.The process-cycle of making this diamond grinding block is longer.Because cutter head is to be welded on the plane of matrix, only combine between cutter head and the matrix by weld force, its welding quality instability in use, comes off easily, so service life is shorter.In order to solve the cutter head problem that comes off, Chinese patent 93104748.X discloses a kind of diamond compact of producing with the low temperature electrocasting method, and it is used for oil drilling tool.It is to utilize a kind of special cryogenic electroform process that diamond layer, cemented carbide substrate and carbide alloy collet three parts are once made to be bonded to firm diamond compact, then, use again special cryogenic electroform process with the composite sheet welding-on on drill bit.But cryogenic electroform process is not very universal in the general tool manufacturing, and it does not still solve the problem that diamond segment comes off easily.

The utility model content

The utility model technical issues that need to address provide a kind of emery wheel of sharp durable, cutter head difficult drop-off.

For solving the problems of the technologies described above, technical solution adopted in the utility model is:

A kind of PCD emery wheel comprises matrix, cutter head.Matrix is a dish, makes the skewed slot that the welding cutter head is arranged on plane on the dish-shaped matrix, has chip-removal hole on the side of dish-shaped matrix, is provided with the centre bore that is connected with the equipment for grinding main shaft in the bottom surface of dish-shaped matrix.The plane becomes certain included angle on above-mentioned skewed slot and the matrix, be the V-type that the base angle is the right angle, one hem width of V-type skewed slot is narrow on one side, cutter head is placed in the skewed slot, in the skewed slot that is welded on by high frequency or other welding manner, cutter head is rectangular-shaped polycrystalline diamond (being PCD) cutter head, and the composite bed of PCD cutter head is towards the skewed slot outside, and a face relative with composite bed holds out against on the short face of V-type groove.Cutter head exceeds the last plane of matrix.

Owing to adopted technique scheme, the obtained technological progress of the utility model is:

Cutter head of the present utility model adopts polycrystalline diamond (PCD) cutter head, and the hardness of PCD composite bed can reach 8000HV, and coefficient of friction is 0.1～0.3, and thermal conductivity factor is 700W/mK, and thermal coefficient of expansion is 0.9X10 ^-6～1.18X10 ^-6, so PCD cutter head and metal or nonmetal very little affinity arranged have good wear resistance and heat conductivity, can reduce greatly in the course of work grinding resistance, improve the sharpness of emery wheel, the therefore service life that can improve emery wheel greatly.

Under the emery wheel duty, most of cutting resistance is delivered on the inclined-plane of V-type skewed slot by cutter head along the skewed slot direction, overcome common emery wheel only bears shearing force by the solder side of cutter head and matrix shortcoming, improved the bonding strength of cutter head and matrix greatly, solved common emery wheel and easily fallen the cutter head problem.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model;

Fig. 2 is the schematic diagram of working face direction of the present utility model;

Fig. 3 is the partial schematic diagram that cutter head of the present utility model is installed.

Wherein: 1, matrix, 1A, skewed slot, 1B, chip-removal hole, 1C, centre bore, 1F, stress surface, 2, cutter head.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further details:

A kind of PCD emery wheel comprises matrix 1 and cutter head 2.Wherein matrix 1 is a dish, and the centre bore 1C that is connected with the equipment for grinding main shaft is arranged in the bottom of dish-shaped matrix 1, in the middle part of the sidewall of the dish of matrix 1 chip-removal hole 1B is arranged, and the upper surface dish edge of dish-shaped matrix 1 is provided with skewed slot 1A.Skewed slot 1A is the narrow on one side V-type of a hem width, skewed slot be the right angle, base angle, skewed slot 1A becomes certain included angle with the last plane of matrix 1, the short face of skewed slot is stress surface 1F, cutter head 2 by high-frequency welding in skewed slot 1A, cutter head 2 is rectangular-shaped PCD cutter head, and the composite bed of PCD cutter head is towards the skewed slot outside, and a face relative with composite bed holds out against on the stress surface 1F of V-type groove; Cutter head 2 exceeds the last plane of dish-shaped matrix 1.

Claims

1, a kind of PCD emery wheel, comprise that the bottom is provided with the dish-shaped matrix (1) of the connecting hole that is connected with equipment for grinding, is fixed on the cutter head (2) on the substrates, it is characterized in that: cutter head (2) is the PCD material, be provided with skewed slot (1A) above the matrix (1), cutter head (2) is fixed in the skewed slot (1A) and is higher than the plane of matrix (1).

2, a kind of PCD emery wheel according to claim 1, it is characterized in that described skewed slot (1A) be a hem width narrow on one side, the base angle is the V-type at right angle, cutter head (2) is welded in the skewed slot (1A).

3, according to claim 1 or 2 described a kind of PCD emery wheels, the composite bed that it is characterized in that described cutter head (2) is towards the outside of skewed slot (1A), and the side of cutter head (2) withstands on the short face of V-type skewed slot (1A).