CN103878440A

CN103878440A - PCD reamer

Info

Publication number: CN103878440A
Application number: CN201410110746.8A
Authority: CN
Inventors: 赵卫娟; 樊宝龙; 张文良; 晁立春
Original assignee: Zhengzhou Diamond Precision Manufacturing Co Ltd
Current assignee: Zhengzhou Diamond Precision Manufacturing Co Ltd
Priority date: 2014-03-25
Filing date: 2014-03-25
Publication date: 2014-06-25

Abstract

The invention discloses a PCD reamer. The PCD reamer comprises a reamer handle and a reamer head. The front end of the reamer head is provided with a first cutting edge, the reamer head is in a flat shape, the front end of the reamer handle is provided with a groove corresponding to the flat-shaped reamer head, the back end of the reamer head is located in the groove of the reamer handle, and the back end of the reamer head is connected with the reamer handle in a welding mode. The position, between the front end of the reamer head and the reamer handle, of the reamer head is provided with a second cutting edge, and the turning radius of the second cutting edge is larger than that of the first cutting edge. The first cutting edge and the second cutting edge are welded to the reamer head and made of PCD materials. A step cutting edge is formed by the first cutting edge and the second cutting edge, the reamer can be used for machining a formed hole, an orifice chamfer and an orifice end face at a time, chips can be discharged conveniently in the machining process, the glossiness of the hole can be increased, the rigidity of the reamer can be increased, the service life of the reamer can be prolonged, production efficiency can be improved, and cost can be saved.

Description

A kind of PCD reamer

Technical field

The invention belongs to machining tool technical field, relate in particular to a kind of PCD reamer.

Background technology

In the last few years, along with scientific and technological development, machinery manufacturing industry is also more and more higher to the requirement of machining accuracy, and reamer is as a kind of machining Common Use Tools, its structure is not only determining intensity, the service life of self, is more determining to cut with scissors out error size and the precision height of workpiece hole.A kind of cutting edge of PCD reamer is mainly composite polycrystal-diamond (or polycrystalline cubic boron nitride compound sheets), this composite sheet is formed through HTHP compacting by polycrystalline diamond layer (or polycrystalline cubic boron nitride layer) and hard alloy layer, together with composite sheet is passed through solder bond with cutter head.And current existing a kind of PCD reamer does not in use often reach expected effect, often produce many problems, for example chip removal has some setbacks, and cutting force is larger, and machining accuracy is low, and working (machining) efficiency is low, and reamer is short service life.The material of the handle of a knife of existing reamer, cutter head is identical material in addition, relatively wastes material, has increased processing cost.

Summary of the invention

The present invention, in order to solve weak point of the prior art, provides a kind of PCD reamer, not only can be so that chip removal, can also increase the fineness in hole, and increase cutter rigidity and life-span, enhance productivity, cost-saving.

For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of PCD reamer, comprise handle of a knife and cutter head, the front end of cutter head is provided with the first cutting edge, it is characterized in that: described cutter head is flat, handle of a knife front end is provided with the groove corresponding with flat cutter head, and the rear end of described cutter head is positioned at the groove of handle of a knife, and rear end and the handle of a knife of cutter head are welded to connect; Position on cutter head between cutter head front end and handle of a knife is provided with the second cutting edge, and the radius of gyration of the second cutting edge is greater than the radius of gyration of the first cutting edge; Described the first cutting edge and the second cutting edge are the cutting edge of the PCD material being welded on cutter head.

The outer edge of the front end of described the first cutting edge is provided with 45 ° of chamfering blades.

The relief angle of described the first cutting edge is 30 °.

Described cutter head is made up of carbide alloy, and described handle of a knife is formed from steel.

Adopt technique scheme, the first cutting edge and the second cutting edge are the cutting edge of the PCD material being welded on cutter head, can in high-speed cutting, obtain very high machining accuracy and working (machining) efficiency, increase the fineness of boring, increase cutter rigidity and life-span; The radius of gyration of the second cutting edge is greater than the radius of gyration of the first cutting edge, the first cutting edge and the second cutting edge form ladder cutting edge, this cutter can be used for time processing forming hole, orifice chamfer and aperture end face, and orifice chamfer and aperture end face can machine by 45 ° of chamfering blades of the outer edge setting of the front end of the first cutting edge and the second cutting edge complementation; Cutter head is flat, is convenient to chip removal; Cutter head is carbide alloy material, handle of a knife is formed from steel, handle of a knife one end is provided with the groove corresponding with flat cutter head, the rear end of cutter head is positioned at the groove of handle of a knife, and rear end and the handle of a knife of cutter head are welded to connect, the material difference of handle of a knife, cutter head, increase the rigidity of cutter, reduce the production cost of cutter, reduced the difficulty of processing of handle of a knife simultaneously, improved production efficiency; The relief angle of the first cutting edge is 30 °, and the outer edge of the front end of the first cutting edge is provided with 45 ° of chamfering blades, and this structural design can be for machining hole mouth chamfering, and makes chip removal more smooth and easy, has increased the fineness of machining hole; The rear end of cutter head is positioned at the groove of handle of a knife, and rear end and the handle of a knife of cutter head are welded to connect, and this design makes handle of a knife tool setting capitiform become guide support, has guaranteed the firm of cutter head.

Accompanying drawing explanation

Fig. 1 is structural front view of the present invention;

Fig. 2 is structure upward view of the present invention;

Fig. 3 is structure left view of the present invention;

Fig. 4 is the structural representation at cutter head position in the present invention;

Fig. 5 is the enlarged drawing at A place in Fig. 1.

The specific embodiment

As shown in Figures 1 to 5, a kind of PCD reamer of the present invention, comprises handle of a knife 2 and cutter head 1, and the relief angle α that the front end of cutter head 1 is provided with the first cutting edge 3, the first cutting edges 3 is 30 °.Cutter head 1 is flat, is convenient to chip removal; Cutter head 1 is made up of carbide alloy material, and handle of a knife 2 is formed from steel, and handle of a knife 2 is different with the material of cutter head 1, has increased the rigidity of cutter, has reduced the production cost of cutter, has reduced the difficulty of processing of handle of a knife 2 simultaneously, has improved production efficiency; Handle of a knife 2 front ends are provided with the groove corresponding with flat cutter head 16, and the rear end of cutter head 1 is positioned at the groove 6 of handle of a knife 2, and the rear end of cutter head 1 and handle of a knife 2 are welded to connect, and this structural design makes handle of a knife 2 form guide support to cutter head 1, have guaranteed the firm of cutter head 1.

The radius of gyration that position on cutter head 1 between cutter head 1 front end and handle of a knife 2 is provided with the second cutting edge 4, the second cutting edges 4 is greater than the radius of gyration of the first cutting edge 3; The first cutting edge 3 and the second cutting edge 4 are the cutting edge of the PCD material being welded on cutter head, PCD material is prior art, and the use of PCD material cutting edge can obtain very high machining accuracy and working (machining) efficiency in high-speed cutting, increase the fineness of boring, increase cutter rigidity and life-span.

The outer edge of the front end of the first cutting edge 3 is provided with 45 ° of chamfering blades 5, the length of side of chamfering blades 5 is preferably set to 0.1 millimeter, the size of the length of side of chamfering blades 5 is not limited to 0.1 millimeter, it can be any one in 0.05 millimeter～0.1 millimeter numerical value, this design can be for machining hole mouth chamfering, and make chip removal more smooth and easy, increase the fineness of machining hole.

The first cutting edge 3 and the second cutting edge 4 form ladder cutting edge, this cutter can be used for time processing forming hole, orifice chamfer and aperture end face, and orifice chamfer and aperture end face can machine by 45 ° of chamfering blades 5 of the outer edge setting of the front end of the first cutting edge 3 and the second cutting edge 4 complementations.

Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the art is to be understood that: still can modify or be equal to replacement the present invention, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims

1. a PCD reamer, comprise handle of a knife and cutter head, the front end of cutter head is provided with the first cutting edge, it is characterized in that: described cutter head is flat, handle of a knife front end is provided with the groove corresponding with flat cutter head, the rear end of described cutter head is positioned at the groove of handle of a knife, and rear end and the handle of a knife of cutter head are welded to connect; Position on cutter head between cutter head front end and handle of a knife is provided with the second cutting edge, and the radius of gyration of the second cutting edge is greater than the radius of gyration of the first cutting edge; Described the first cutting edge and the second cutting edge are the cutting edge of the PCD material being welded on cutter head.

2. a kind of PCD reamer according to claim 1, is characterized in that: the outer edge of the front end of described the first cutting edge is provided with 45 ° of chamfering blades.

3. a kind of PCD reamer according to claim 1, is characterized in that: the relief angle of described the first cutting edge is 30 °.

4. a kind of PCD reamer according to claim 1, is characterized in that: described cutter head is made up of carbide alloy, and described handle of a knife is formed from steel.