CN201257551Y

CN201257551Y - Polycrystalline diamond boring reamer blade

Info

Publication number: CN201257551Y
Application number: CNU2008201484789U
Authority: CN
Inventors: 张鹏里; 汪建海
Original assignee: Zhengzhou Diamond Precision Manufacturing Co Ltd
Current assignee: Zhengzhou Diamond Precision Manufacturing Co Ltd
Priority date: 2008-08-12
Filing date: 2008-08-12
Publication date: 2009-06-17
Anticipated expiration: 2018-08-12

Abstract

The utility model relates to a brazed polycrystalline diamond boring-reaming blade which is effectively suitable for processing the bottom hole of a valve guide pipe and the guide pipe hole on the cylinder head and overcomes the problems of solo function, short service life and high processing cost of the prior cutting tool. The utility model adopts the technical proposal that the boring-reaming blade comprises a blade and a cutter body, wherein, the blade is a polycrystalline diamond composite blade, the cutter body is a cemented carbide cutter body, the blade and the cutter body are welded together, the tool tip A of the blade is of an circular arc shape with radius R of 0.1-0.2 mm, the blade is a flat long body, and the cutter body surface on one side where the blade is installed presents a step-type inclined groove shape. The utility model improves the surface quality of the processed parts, enhances the strength and the rigidity of the tool tip, prolongs the service life of the cutting tool, not only can be used for processing the bottom hole of the vale guide pipe, but also can be used for processing the guide pipe hole, is multi-functional, is a big innovation on the cutting tool and has remarkable economic and social benefits.

Description

The welding polycrystalline diamond boring cutting blade

One, technical field

The utility model relates to cutter, particularly a kind of welding polycrystalline diamond boring cutting blade.

Two, background technology

The cylinder cap of Diesel engine generally uses HT250 (casting pig) to make, valve guide bushing bottom outlet on the cylinder cap adopted carbide alloy coating cutter processing originally, point of a knife (blade) is 45 ° * 0.1 chamfering, but processes the casting pig quick abrasion with this cutter, and the life-span is short, also some producer processes with polycrystalline cubic boron nitride (PCBN) cutter, because the conduit bottom diameter is little, linear velocity does not increase, and can not bring into play the good characteristics of PCBN cutter red hardness, therefore, processing effect is also undesirable; Generally adopt the powdered metallurgical material manufacturing for the valve guide bushing in the engine industry, the hard alloy cutter of band dope layer is adopted in the processing of guide hole, because the problem on its cutter structure, tool wear is fast, service life is short, and is not easy for processing valve guide bushing bottom outlet, function singleness, do not satisfy the needs of modern production development, the innovation of cutter is imperative.

Three, utility model content

At above-mentioned situation, for overcoming the prior art deficiency, the utility model purpose just provides a kind of welding polycrystalline diamond boring cutting blade, be effective to process valve guide bushing bottom outlet and the guide hole that engine cylinder covers, it is single to overcome existing tool function, service life is short, the problem that processing cost is high, the technical scheme of its solution are to comprise blade and cutter hub, blade is polycrystalline diamond (PCD) composite sheet, cutter hub is the carbide alloy cutter hub, and blade and cutter hub weld together, and the point of a knife of blade (cutting edge) A is the circular-arc of radius R 0.1-0.2mm, cutter hub is the prolate body, the cutter hub face that blade one side is housed is step inclined plane groove shape, and the utility model has improved the work piece surface quality, has increased the intensity and the rigidity of point of a knife (cutting edge), prolonged the service life of cutter, both can be used for processing the valve guide bushing bottom outlet, and can be used for processing guide hole again, a cutter is dual-purpose, be that one on the cutter innovated greatly, economic and social benefit is remarkable.

Four, description of drawings

Fig. 1 is a structural front view of the present utility model.

Fig. 2 is a vertical view of the present utility model.

Fig. 3 be among Fig. 1 B-B to sectional view.

Five, the specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.

Shown in Fig. 1-3, the utility model comprises blade and cutter hub, blade 1 is polycrystalline diamond (PCD) composite sheet, cutter hub 2 is the carbide alloy cutter hub, blade and cutter hub weld together, the point of a knife of blade (cutting edge) A is the circular-arc of radius R 0.1-0.2mm, and the cutter hub face that blade one side is housed is step inclined plane groove shape 3.

In order to guarantee result of use, save material, said blade 1 is flat berrette file shape, the curved surface shape that the blade front portion is linked to each other and constitutes with the arc body by stretched.Said composite polycrystal-diamond can adopt existing polycrystalline diamond compound tool bit (sheet) to process, be about to point of a knife A and be originally 45 ° * 0.1 chamfering, adopting the prior art reconditioning is that point of a knife (cutting edge) A radius R is circular-arc the getting final product of 0.1-0.2mm (being abbreviated as R0.1-0.2), and cutter hub gets final product (can adopt prior art to process clamping location inclined plane groove shape 3) by present hard alloy cutter hub.

Find out by said structure, the utility model adopts the polycrystalline diamond blade to substitute former hard alloy coated blade (cutter), particularly to have adopted unprecedented point of a knife be the new construction of R0.1-0.2 to blade, changed former point of a knife and be 45 ° * 0.1 chamfering structure, original tool wear is fast, service life, short defective was overcome, improve cutter life, can repeat reconditioning, greatly reduced processing cost and production cost, both solved the processing of the valve guide bushing bottom outlet that engine cylinder covers, solved the processing problems in engine valve guide hole again simultaneously, the many usefulness of a cutter are made the best use of everything, the production efficiency height, the workpiece quality is good, compares with the like product cutter, improves service life more than 10 times, reduce use cost more than 5 times, economic and social benefit is remarkable.

Claims

1, a kind of welding polycrystalline diamond boring cutting blade, comprise blade and cutter hub, it is characterized in that, blade (1) is a composite polycrystal-diamond, cutter hub (2) is the carbide alloy cutter hub, and blade and cutter hub weld together, and the point of a knife of blade (A) is the circular-arc of radius R 0.1-0.2mm, cutter hub is a prolate shape, and the cutter hub face that blade one side is housed is step inclined plane groove shape (3).

2, welding polycrystalline diamond boring cutting blade according to claim 1 is characterized in that, said blade (1) is flat berrette file shape, the curved surface shape that the blade front portion is linked to each other and constitutes with the arc body by stretched.