Hard alloy broach is repaired grind the application with coating technology
- source:TANAY CNC Machining
A few when basically assist planar twist drill of twist drill main and auxiliary plane are tool reference plane, tool cutting edge plane, medium section plane and column section plane. If take no account of auxiliary motion, twist drill head advocate the bit more aleatoric tool reference plane on cutting blade, as a result of the framework characteristic of twist drill, broach advocate the tool reference plane that orders each on cutting blade is change. Advocate the bit more aleatoric tool cutting edge plane on cutting blade, it is to include direction of speed of this bits of cutting and cut the plane that machines the surface at this bits. Tool cutting edge plane and tool reference plane are perpendicular, and advocate the tool cutting edge plane that orders each on cutting blade all not identical. Advocate the bit more aleatoric column section plane on cutting blade is the columnar range that pass this to nod and makes, advocate the columnar face that the different column section plane on cutting blade is different radius. 2.
Helix angle of the choice of the horn after the horn before the chooses twist drill broach main geometry parameter of the main geometry parameter of twist drill broach chooses to include blade of cutting of the choice of broach vertex angle, broach is mixed, broach is right the relevant processing of the influence analysis of broach life and point. Broach vertex angle decides to cut the size of the horn before bits width and broach. When broach diameter and feed are certain, increase vertex angle, criterion scrap narrow, the bear on unit cutting blade is reduced. The horn before vertex angle is right has very big effect, increase vertex angle to be helpful for improving the cutting condition of the place that get a heart accordingly. Vertex angle influence cuts the way that bits pours out of. Cutting tool designs a material related the basis, hardness of product of combinative place treatment is not tall, but agglutinant bigger characteristic, choose this broach vertex angle to be 140 ° . Of twist drill before part is decided by the other geometry parameter of broach. When the machine tool undertakes high speed cutting, horn is out of shape to cutting before the influence that reachs cutting power is minor, use at the same time lesser before strength of point of a knife can enhance when horn. After current part is certain, horn is jumped over after big, point is sharper, but can reduce wedge horn to affect cutting tool accordingly intensity and medicinal powder hot area. For this, what choose the actor after broach is a few smaller, take for 8 ° . 3.
Broach helix angle is analysed to the influence of broach life by the appearance characteristic of twist drill each bits of helix angle on knowable cutting blade is change, helix angle is affected directly advocate of cutting blade before horn. Helix angle is bigger, criterion point is sharper, cutting is lighter, can cause serious treatment sclerosis phenomenon to make the crucial point very sharp otherwise wear away. Cutting tool designs a material related the basis, take helix angle to be able to satisfy use requirement for 30 ° , facilitate large quantities of quantities are produced at the same time. 4.
The processing of the relevant processing point of point includes horizontal blade to amend, arris and pour the measure such as blade. In the light of be machined by treatment material, machine tool parameter of function, treatment and clamping apparatus operating mode, undertook appropriate passivation to the point of broach, improve bit auger cut function, reduced cutting tool wear extent. The application of coating technology falls in the circumstance with cutting changeless parameter, produce cost to rise to manufacture efficiency and be reduced, use coating technology to cutting tool, reduce cutting tool to wear away, in order to raise cutting tool durability more and more make a kind of trend. Cutting tool coating is to point to better in intensity and tenacity hard alloy or high-speed steel (HSS) matrix apparently, use the difficult frit metal with good wearability of layer of Tu Fuyi of method of gas phase deposit or metalloid compound. Coating regards a chemistry as protective screen and hot protective screen, reduced cutting tool and workpiece between diffuse to react with chemistry, reduced cutting tool to wear away thereby. Coating cutting tool has exterior hardness tall, wearability is good, chemical function stability, heat-resisting is able to bear or endure thermal conductance of Xiaohe of factor of oxidation, attrition is low and characteristic. Through the broach after coating treatment amount had apparent promotion, odd cost is reduced greatly. CNC Milling CNC Machining