Boring blade for machining conduit hole
A catheter hole and blade technology, which is applied in metal processing equipment, cutting tools for lathes, manufacturing tools, etc., can solve the problem of limited range of hard alloy processing materials, low machining accuracy and cutting speed, and low service life of hard alloy. problems, to achieve the effect of improving the surface roughness and machining accuracy, excellent inner hole accuracy, good thermal conductivity and wear resistance
Active Publication Date: 2013-04-10
ZHENGZHOU DIAMOND PRECISION MFG
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Problems solved by technology
[0003] Moreover, the traditional conduit hole boring inserts are solid carbide or PCD welding inserts, in which the range of cemented carbide processing materials is limited and the machining accuracy and cutting speed are too low, the service life of cemented carbide is low, and the processing efficiency is low
PCD welding blades can realize high-speed and high-precision machining, but due to unstable welding technology, the strength of PCD cutting will be insufficient, the stability will be poor, and the service life will be reduced.
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[0013] Example: such as figure 1 As shown in -4, the boring blade for processing the conduit hole, the longitudinal section of the boring blade is a right-angled trapezoid, and the lower bottom surface of the boring blade body is butt-welded with a cutting part 2 with a vertical cross-section of a right-angled trapezoid, and the cutting part 2 is an integral structure And the material used is polycrystalline diamond. The middle part of the bottom surface of the cutting part 2 is provided with a rectangular positioning groove 3. The positioning groove 3 is formed by laser processing. The side of the cutting portion 2 is provided with a relief angle α of 7°.
[0014] The cutting part 2 is made of PCD material as a whole, which increases the strength and stability of the blade, high speed and high precision and long service life. Polycrystalline diamond has the characteristics of high hardness, high compressive strength, good thermal conductivity and wear resistance. The use o...
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The invention provides a boring blade for machining a conduit hole. The longitudinal section of the boring blade is a right-angled trapezoid; the lower bottom surface of a boring blade body is welded with a cutting part of which the longitudinal section is a right-angled trapezoid in a butt way via a welding flux; the middle of the bottom surface of the cutting part is provided with a rectangularlocation groove; the bottom of the location groove has a slope structure, and the section of the bottom of the location groove adjacent to the cutting part has a structure that an acute angle side isinclined inwards; the cutting part has an integrated structure and is made of polycrystalline diamonds; and the location groove is machined by laser. By the invention, the machining surface roughnessand the machining precision of the blade are improved, the product quality is greatly improved, the service life of the boring blade is prolonged, and the cost is effectively reduced.
Description
technical field [0001] The invention relates to the technical field of machining, in particular to a boring blade for machining conduit holes. Background technique [0002] Boring blades are widely used in the conduit hole of the cylinder head of the automobile engine. The processing tool for the conduit hole adopts a multi-blade composite (knife-edge machine clamp, inlaid welding combination) structure, which replaces grinding with reaming, boring, and extrusion. The conduit hole is a deep hole. Processing, the requirements for dimensional accuracy and surface roughness are relatively high. In the application of engine valve guide hole machining, precision boring tool machining accuracy and surface quality are better than gun reaming machining. The cutting part of the boring blade is welded by flux, the cutting part is mainly a composite sheet of polycrystalline diamond (or polycrystalline cubic boron nitride), and the composite sheet is a polycrystalline diamond layer (or...
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IPC IPC(8): B23B27/16B23B27/20
Inventor 徐华鸣原婵婵马明
Owner ZHENGZHOU DIAMOND PRECISION MFG