CN102814535A - Solid carbide drill chip breaker groove for steel part and design method thereof - Google Patents

Abstract

The invention discloses a solid carbide drill chip breaker groove for a steel part and a design method of the solid carbide drill chip breaker groove for the steel part. The structure of the solid carbide drill chip breaker groove for the steel part is as follows: one end of a chip rolling groove is a negative chamfered edge, the other end thereof is a chip breaker table, and the chip rolling groove is arranged at a joint point of the chip breaker table R. The design method of the solid carbide drill chip breaker groove for the steel part comprises the following steps of: 1, selecting a five-axis grinding centric device; 2, selecting a diamond grinding wheel in a type of 75 degrees as a grinding wheel; and 3, carrying out the specific operation as follows: 1) adopting an imported five-axis-linked grinding center, and setting a cutting blade-blade angle of inclination in a machining center program; 2) setting the thickness of a drill core according to 26% of diameter of the drill of the steel part; and 3) enabling a solid carbide drill of phi(10) to have the following specific parameters of chip rolling and chip breaking requirements: a front angle is 10 degrees, the thickness of the core is 2.5 mm, a tilt angle is 8 degrees and an angle of declination of the grinding wheel is 3 degrees. The solid carbide drill chip breaker groove for the steel part has the following advantages that: the temperature of a cut region is lowered, the durability of a cutting tool is improved, the winding of cut chips on a cutter handle and the cutting tool are effectively avoided, the chip blocking is avoided, the breaking phenomenon of the cutting tool, caused by the chip blocking, is eliminated, the high-speed cutting is completely adapted, and the cutting requirement of high-strength steel is met.

Description

Steel part is with solid carbide drill chip-breaker and method for designing

Technical field

What the present invention relates to is that a kind of steel part is with solid carbide drill chip-breaker and method for designing.

Background technology

The general drill bit preparation method of China is to select corresponding special ditch slotting cutter for use 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 solve volume bits and chip removal problem so basically, and use till today always.Solid carbide drill is used on the Digit Control Machine Tool, and its feature is: rotating speed is high, and the amount of feeding is big; Smear metal produced in moment, required chip removal rapid, and is timely and smooth and easy; When especially cutting the steel part material, cutting force is big, produces a large amount of heat in metal cuttings; Except that 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, influences next step processing.In addition, the cutting of curling is wanted and can required fracture naturally down in length control, 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, and it is excessive to cut heat, and cutting curls and bending too early, and fracture is unfavorable equally to chip removal.

Summary of the invention

What the present invention proposed is that a kind of steel part is with solid carbide drill chip-breaker and method for designing; Its purpose is intended to overcome the above-mentioned defective of existing in prior technology; Solve the processing steel part and especially process the volume bits in the high strength steel part; Chip breaking, 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 invention: 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 a chip breaker, and chip curling groove is in the interface point of chip breaker R.

Steel part comprises following processing step with the method for designing of solid carbide drill chip-breaker:

One, selecting five grinding center equipment for use, is to make the indispensable equipment of hard alloy cutter;

Two, emery wheel is selected 75 ° of skives for use;

Three, concrete operations:

1) adopts 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, 10 ° of promptly all angle of cutting edge, 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 concrete 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 invention: through 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 curled, and is " tadpole shape ", and in three volumes, fractures and collapse and portal automatically; Make the smear metal chip removal smooth and easy, and take a large amount of cutting heats out of, so reduced the temperature of cutting zone; Improve the durability of cutter,, effectively prevented the winding of smear metal on handle of a knife and cutter because smear metal all can be curled and the discharge that fractures automatically; Do not constitute simultaneously stifled bits, 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 on drill bit blade 5, is provided with the solid carbide drill chip-breaker.

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 a 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 a drill groove, also is the stressed forming area that chip deformation is curled, fractureed.

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 helps 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

Steel part comprises following processing step with the method for designing of solid carbide drill chip-breaker:

One, selecting five grinding center equipment for use, is to make the indispensable equipment of hard alloy cutter;

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

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

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, in program, sets 8 ° of pivot angles as for chip breaker, promptly can control the height of chip breaker equally;

Three, concrete operations:

1) adopts 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, 10 ° of promptly all angle of cutting edge, 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 concrete 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.

Want smear metal and form the volume bits, theoretical according to chip breaking, then the chip-breaker of certain radius must be on the cutter rake face, ground, and the height of chip breaker will be controlled well.For drill groove, just be meant the bottom radius of helical flue of drill, as for the height of chip breaker, do not need basically to consider to 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, and method commonly used at present is method of forming processing, promptly adopts forming grinding wheel to grind drill groove; Be similar to the meaning of common groove cutter, it is more that enterprises such as present Japanese OSG use, but make this forming grinding wheel complex process; Comprise the equipment input, and because of the product specification kind is different, the variation of the corresponding emery wheel that causes; Comprise reconditioning behind the abrasion of grinding wheel or the like, these all make the cost of forming grinding wheel very high.

Drill bit slot grinding method of the present invention, i.e. interferometric method.Through the program setting Several Parameters, select the grooved that general Carborundum wheel can grind out to be needed.To the influence of smear metal form, 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 influences the volume bits and the chip breaking of smear metal.

Claims (4)

1. steel part is used the solid carbide drill chip-breaker, it 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 a chip breaker, and chip curling groove is in the interface point of chip breaker R.

2. solid carbide drill chip-breaker according to claim 1 is characterized in that described negative chamfered edge is the drill bit point of a knife, negative 10 °.

3. steel part as claimed in claim 1 is characterized in that with the method for designing of solid carbide drill chip-breaker this method comprises following processing step:

One, selecting five grinding center equipment for use, is to make the indispensable equipment of hard alloy cutter;

Two, emery wheel is selected 75 ° of skives for use;

Three, concrete operations:

1) adopts 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, 10 ° of promptly all angle of cutting edge, 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 concrete 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.

4. according to the method for designing of the described steel part of claim 3 with the solid carbide drill chip-breaker, the concrete parameter of drill bit chip-breaker cross section R that it is characterized in that rolling up bits, chip breaking is following:

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 ? ?

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