CN202684163U

CN202684163U - Integral hard alloy drill bit chip breaker groove for steel part

Info

Publication number: CN202684163U
Application number: CN 201220379562
Authority: CN
Inventors: 王伟
Original assignee: TAIZHOU X-DAKE CUTTING TOOL Co Ltd
Current assignee: Jiangsu Xinda Tools Technology Co ltd
Priority date: 2012-08-02
Filing date: 2012-08-02
Publication date: 2013-01-23
Anticipated expiration: 2022-08-02

Abstract

The utility model relates to an integral hard alloy drill bit chip breaker groove for a steel part. The structure is that a negative chamfer is arranged at one end of the chip breaker groove, a chip breaker is arranged at the other end of the chip breaker groove, and the chip breaker groove is positioned at the junction point of the chip breaker R. A design method comprises the following steps: (I) selecting a five-axis grinding center device; (II) selecting a 75-degree diamond grinding wheel as a grinding wheel; and (III) performing the specific operation as follows: (1) adopting an imported five-axis linkage grinding center, and setting the inclination angle of a cutting edge in a program of a machining center; (2) setting the core thickness of a drill bit according to the standard of being 26% of the diameter of the drill bit for the steel part; and (3) meeting the specific parameters to be achieved by the phi 10 integral hard alloy drill bit according to chip curling and chip breaking requirements: the front angle is 10 degrees, the core thickness is 2.5mm, the swing angle is 8 degrees and the deflection angle of the grinding wheel is 3 degrees. The integral hard alloy drill bit chip breaker groove has the advantages of reducing the temperature in a cutting area, improving the durability of a cutter, effectively preventing chips from being wound on a cutter handle and the cutter, preventing chip blockage and eliminating the breaking phenomenon of the cutter due to chip blockage. The integral hard alloy drill bit chip breaker groove can be completely suitable for high-speed cutting and meet the cutting requirements of high-strength steel.

Description

Steel part solid carbide drill chip-breaker

Technical field

The utility model relates to a kind of steel part solid carbide drill chip-breaker.

Background technology

The general drill bit preparation method of China is to select corresponding special groove milling cutter by the drill groove diameter, and there is the standard of this respect in country.Common high-speed steel drill rotating speed is slow, and the amount of feeding is little, and pecks formula processing than the deep hole employing, must throw one section into and withdraw from chip removal, can substantially solve like this volume bits and chip removal problem, and use till today always.Solid carbide drill is used on the Digit Control Machine Tool, its feature is: rotating speed is high, the amount of feeding is large, and smear metal produced in moment, requires chip removal rapid, timely and smooth and easy, when especially cutting the steel part material, cutting force is large, produces a large amount of heat in metal cuttings, except cooling fully, require smear metal to discharge rapidly and take away a large amount of cutting heats.Simultaneously, the cutting steel part should form volume bits, otherwise cutting can be wrapped on lathe handle of a knife and the cutter, affects next step processing.In addition, curling cutting is wanted and can naturally be fractureed under length control requires, otherwise smear metal is long, increase with the hole in wall friction, resistance strengthens, and forms stifled bits, the smear metal that forms with cutting moment forms the extruding heap and ties, obstruction cause cutter cracked, fracture; Volume bits radius is too small, substantially exceeds its material yield intensity, then can cause cutting force, cuts heat excessive, and too early curling and bending of cutting, and fracture is unfavorable equally to chip removal.

Summary of the invention

The utility model proposes a kind of steel part solid carbide drill chip-breaker, its purpose is intended to overcome the existing defects of prior art, solution processing steel part is especially processed the volume bits in the high strength steel part, chip breaking, the problems such as chip removal, the present invention's while is applicable to the processing of magnesium iron 450～600 material parts.

Technical solution of the present utility model: steel part comprises chip curling groove, chip breaker, negative chamfered edge and interface point with the structure of solid carbide drill chip-breaker, wherein an end of chip curling groove is negative chamfered edge, the other end of chip curling groove is chip breaker, and chip curling groove is in the interface point of chip breaker R.

The steel part method for designing of solid carbide drill chip-breaker comprises following processing step:

One, selecting five axle grinding center equipment, is to make the hard alloy cutter necessary equipment;

Two, emery wheel is selected 75 ° of skives;

Three, concrete operations:

1) adopt import five-axle linkage grinding center, adopt 11V9 diamond grinding emery wheel, in the work in-process heart program, set the cutting edge cutting edge inclination, namely rake angle is 10 °, 3 ° of emery wheel drift angles, 8 ° of emery wheel pivot angles;

2) core thickness of drilling bit is pressed 26% standard setting of steel part bit diameter; Thick fluting stays the 0.2mm surplus, and the correct grinding groove is to given size, and slot length is set on request, runs out of 10mm, 10 ° of the negative chamfered edges of all swords, and negative land width of the face is pressed 5% of steel part standard and is set;

3) the Φ 10 solid carbide drills volume bits that should reach, the design parameter that chip breaking requires are: 10 ° of anterior angles, the thick 2.5mm of core, 8 ° of pivot angles, 3 ° of emery wheel drift angles.

Advantage of the present utility model: by the drill bit grooved of setting, such drill bit is at steel part, especially in the processing of high strength steel hole, smear metal all can be curling, be " tadpole shape ", and automatically in three volumes, fracture and collapse and portal, make the smear metal chip removal smooth and easy, and take a large amount of cutting heats out of, therefore reduced the temperature of cutting zone, improve cutting wear, because all curling and discharges that automatically fractures of energy of smear metal, effectively prevented the winding of smear metal on handle of a knife and cutter, do not consisted of stifled bits simultaneously, cutter is got rid of because of the phenomenon that fractures that stifled bits produce.Adapt to high-speed cutting fully, satisfy the cutting requirement of high strength steel, meet the design's requirement.Hole, five times of footpaths is processed in the normal wear of Tool in Cutting sword, and cutter life reaches 60m.Reach SUMITOMO CHEMICAL, the U.S. such as agree receive at the similar cutter level of import.

Description of drawings

Accompanying drawing 1 is the structural representation of drill bit.

Accompanying drawing 2 is structural representations of solid carbide drill chip-breaker.

Accompanying drawing 3 is enlarged diagrams of negative chamfered edge.

Among the figure 1 is chip curling groove, the 2nd, chip breaker, the 3rd, negative chamfered edge, the 4th, interface point, the 5th, drill bit blade, the 6th, drill handle part.

The specific embodiment

Contrast accompanying drawing 1, its structure comprises drill bit blade 5 and drill handle part 6, wherein is provided with the solid carbide drill chip-breaker at drill bit blade 5.

Contrast accompanying drawing 2, the structure of solid carbide drill chip-breaker comprise chip curling groove 1, chip breaker 2, negative chamfered edge 3 and interface point 4, and wherein an end of chip curling groove 1 is negative chamfered edge 3, and the other end of chip curling groove 1 is chip breaker 2, and chip curling groove 1 is in the interface point 4 of chip breaker R.

Described chip curling groove 1 place is drill groove, also is the stressed forming area that chip deformation is curling, fracture.

Described chip breaker 2 places are the excision of the high point of the drill bit back of the body, and purpose is to guarantee to cut a large amount of discharges that unnecessary back is conducive to smear metal and cutting fluid under the chip-breaker height prerequisite.

Contrast accompanying drawing 3, negative chamfered edge place is the drill bit point of a knife, and one negative 10 ° negative chamfered edge has been done at this point of a knife place, and purpose is to improve the cutting hardness at apex point place.

Embodiment

Two, emery wheel is selected skive, 1V1(75 ° of emery wheel model);

Below be that the volume that should reach is considered to be worth doing, the design parameter of the drill bit chip-breaker cross section R of chip breaking, design parameter is as follows:

The blade size	Bottom radius	The blade size	Bottom radius
				Φ3	R1.23	Φ4	R1.45
Φ5	R1.71	Φ6	R2.02
				Φ7	R2.31	Φ8	R2.6
Φ9	R2.89	Φ10	R2.99
				Φ11	R3.25	Φ12	R3.41
Φ13	R3.61	Φ14	R3.81
				Φ15	R4.06	Φ16	R4.1
Φ17	R4.18	Φ18	R4.25
				Φ19	R4.42	Φ20	R4.6
Φ21	R4.68	Φ22	R4.75
				Φ23	R4.9	Φ24	R5.1
Φ25	R5.41	?	?

Described drill bit chip-breaker bottom land R radius and interferometric method process tool anterior angle are set with close association.Take hole, 3 times of footpaths to be processed as example, establish 10 ° when the drill bit anterior angle, core thickness of drilling bit is pressed standard setting, can reach the bottom land R radius under above each specification volume bits, the chip breaking state, sets 8 ° of pivot angles as for chip breaker in program, namely can control equally the height of chip breaker;

Three, concrete operations:

Want smear metal and form the volume bits, theoretical according to chip breaking, then the chip-breaker of certain radius must be ground at the cutter rake face, and the height of chip breaker will be controlled well.For drill groove, just refer to the bottom radius of helical flue of drill, as for the height of chip breaker, substantially do not need to consider for drill bit.As long as when the high point of the excision drill bit back of the body, adapt to the position of control interface point 4.The grooved of drill bit is made, method commonly used is method of forming processing at present, namely adopt forming grinding wheel to grind drill groove, be similar to the meaning of common groove cutter, it is more that the enterprises such as present Japanese OSG use, but make this forming grinding wheel complex process, comprise equipment investment, and because the product specification kind is different, the variation of the corresponding emery wheel that causes, comprise reconditioning behind the abrasion of grinding wheel etc., these all make the cost of forming grinding wheel very high.

Drill bit slot grinding method of the present invention, i.e. interferometric method.By the several parameters of program setting, select the grooved that general Carborundum wheel can grind out to be needed.On the impact of Chip Morphology, analysis draws through the different parameters that studies for a long period of time: drill bit bottom land R radius (chip curling groove 1 place among Fig. 2) directly affects volume bits and the chip breaking of smear metal.

Claims

1. steel part solid carbide drill chip-breaker is characterized in that comprising chip curling groove, chip breaker, negative chamfered edge and interface point, and wherein an end of chip curling groove is negative chamfered edge, and the other end of chip curling groove is chip breaker, and chip curling groove is in the interface point of chip breaker R.