CN201376110Y

CN201376110Y - Inner cooling translocation step drill

Info

Publication number: CN201376110Y
Application number: CN200920102164U
Authority: CN
Inventors: 刘新平; 韩占平
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-20
Filing date: 2009-04-20
Publication date: 2010-01-06
Anticipated expiration: 2019-04-20

Abstract

The utility model provides an inner cooling translocation step drill which comprises a fixing part and a drill bit body, wherein the drill bit body has steps and is in a cylindrical shape; the axial section profile of the drill bit body is in the shape of steps, and the end of the outside diameter of the drill bit body close to the fixing part is larger than that of the end far away from the fixing part; the top of the drill bit body is provided with an end surface inner cutter used for processing the central part of a hole and an end surface outer cutter used for processing the outer side of the hole; a step-shaped protrusion of the drill bit body is provided with an indexable cutter; the surface of the drill bit body is provided with two spiral grooves for containing drilling chip and cutting solution; and the solid part of the drill bit body is provided with two spiral holes for being filled with the cutting solution with a certain pressure. The inner cooling translocation step drill can make a step hole by feeding once.

Description

Interior cold transposition step drill

Technical field

The utility model relates to a kind of interior cold transposition step drill.

Background technology

When existing drill bit is made the notch cuttype hole on material, normally adopt the different drill bit of a plurality of diameters to process respectively, at first use the drill bit of diameter minimum to process a hole, and then the drill bit by different-diameter progressively processes shoulder hole on hole wall.So just need repeatedly bore processing, very trouble.Simultaneously, adding the high cause thermal damage drill bit of man-hour, need add stop-spraying cooling fluid not on drill bit in man-hour usually in order to prevent to produce.But because the gap between drill bit and the material is minimum, and can not pressurize, therefore the cutting fluid that enters is considerably less, cools off, lubricant effect is bad.

The utility model content

At defective that exists in the prior art and deficiency, the purpose of this utility model is to propose a kind of interior cold transposition step drill, can disposablely process required shoulder hole, because by two internal helicoid cooling hole filling certain pressure cutting fluids, cooling and lubricant effect are better.

In order to achieve the above object, the utility model proposes a kind of interior cold transposition step drill, comprise fixed part and drill body, described drill body is have step cylindrical, described drill body axial cross section outline is stepped, and the external diameter of an end of the close described fixed part of drill body is greater than the external diameter away from fixed part one end; Side tool piece and be used for side tool piece outside the end face in the outside of machining hole in described drill body top is respectively equipped with the end face of the core that is used for machining hole; The stair-stepping jut of described drill body is provided with indexable insert tip, throw away tip; Described drill body surface is provided with two helicla flutes with ccontaining drilling cuttings and cutting fluid, also is provided with two threaded hole of the cutting fluid of the certain pressure that is used to annotate in the described drill body.

Preferred as technique scheme, described double helix cooling hole is arranged in the described drill body and along described drill body axial screw extends.

Preferred as technique scheme, two helicla flutes on described drill body surface are symmetricly set in described drill body surface, extend along described drill body axial screw.

Preferred as technique scheme, described drill body outer surface is provided with two ladders and external diameter reduces successively, and described each stair-stepping jut is respectively equipped with indexable insert tip, throw away tip.

The utility model proposes a kind of interior cold transposition step drill, comprise fixed part and drill body, described drill body is have step cylindrical, described drill body axial cross section outline is stepped, and the external diameter of an end of the close described fixed part of drill body is greater than the external diameter away from fixed part one end; Side tool piece and be used for side tool piece outside the end face in the outside of machining hole in described drill body top is respectively equipped with the end face of the core that is used for machining hole; The stair-stepping jut of described drill body is provided with indexable insert tip, throw away tip; Described drill body surface is provided with two helicla flutes with ccontaining drilling cuttings and cutting fluid, also is provided with two threaded hole of the cutting fluid of the certain pressure that is used to annotate in the described drill body.

The utility model has also proposed a kind of method of using above-mentioned interior cold transposition step drill manufacturing shoulder hole, comprising: 1, a kind of aforesaid interior cold transposition step drill is provided; 2,, adjust the angle of corresponding indexable formula blade respectively according to the aperture of the shoulder hole of required processing; 3, cold transposition step drill in use is somebody's turn to do cools off injection certain pressure cutting fluid in the hole simultaneously in described two spirals.The method of interior cold transposition step drill that the utility model proposes and manufacturing shoulder hole has the following advantages:

1, can carry out drilling, boring Compound Machining, one bores many usefulness, improves working (machining) efficiency and precision, reduces the cutter expense;

2, the indexable use of blade, replaceable cutter piece uses, and cutter hub obtains recycling, reduces the cost of charp tool;

3, with cold well format filling certain pressure cutting fluid in the double helix, improve cooling, lubricant effect, structure is compact more, improves crudy;

4, interior cold transposition step drill, one-pass is finished the processing of different operations, compares with traditional fluted drill, and cutting speed is fast, and surface quality is good, is more suitable for the drill for high-speed of shoulder hole.Reduce number of changing knife simultaneously, save frequent tool change time, can also reduce the quantity and the stock of cutter, help management and reduce manufacturing cost.

Description of drawings

Fig. 1 is the structural representation of the utility model preferred embodiment;

Fig. 2 is that the A-A of Fig. 1 is to cutaway view;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is interior cold transposition step drill end face cutter piece processing schematic diagram;

Fig. 5 is interior cold transposition step drill drilling schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.For the person of ordinary skill in the field, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

The interior cold transposition step drill that the utility model proposes, its preferred embodiment structure comprise fixed part and drill body 1 as shown in figures 1 and 3.As shown in Figure 1, described drill body 1 is for to have the cylindrical of step, and described drill body 1 axial cross section outline is stepped, and drill body near the external diameter of an end of described fixed part greater than external diameter away from fixed part one end; Side tool piece 9 and be used for side tool piece 8 outside the end face in the outside of machining hole in described drill body 1 top is respectively equipped with the end face of the core that is used for machining hole; The stair-stepping jut of described drill body 1 is provided with indexable insert tip, throw away tip 4,7; Described drill body surface is provided with two helicla flutes 6 with ccontaining drilling cuttings and cutting fluid, and the entity part of described drill body is shaped on two threaded hole 10 be used to annotate cutting fluid of certain pressure.As shown in Figure 1, be provided with the helicla flute 6 that is used for chip removal on the drill body surface.As shown in Figure 1, it is inner and extend along described drill body 1 axial screw that described spiral cooling hole 10 is arranged at described drill body 1 entity.Described two helicla flutes are symmetricly set in described drill body 1 surface, extend along described drill body 1 axial screw along described drill body 1 surface.Shown in Fig. 1, embodiment shown in Figure 3 is exactly the interior cold transposition step drill that adopts two spirals cooling holes 10.As shown in Figure 1, described drill body 1 outer surface is provided with two ladders and external diameter reduces successively, and described each stair-stepping jut is respectively equipped with indexable insert tip, throw away tip 4 and indexable insert tip, throw away tip 7.As depicted in figs. 1 and 2, described fixed part comprises that the location that is arranged at described drill body far-end faces 2 directly, and fixing locating flange 3.

As shown in Figure 1, on drill body 1 with high-strength screw 5 fixed indexable insert tip, throw away tip 4 as second order cutter piece, as the indexable insert tip, throw away tip 7 of single order cutter piece, and be arranged at side tool piece 9 in the outer side tool piece 8 of end face of far-end of drill body 1 and the end face.As shown in Figure 4 and Figure 5, the interior circle 11 that 9 processing of side tool piece are portalled in the end face, the cylindrical 12 that outer side tool piece 8 processing of end face are portalled.

Step drill during processing shoulder hole, with the location face directly 2 and locating flange 3 location and installation on drilling machine, rotate at a high speed by motor-driven, simultaneously in the cutter hub 1 in the double helix cold hole 10 can discharge the cutting fluid of pressurization.As shown in Figure 5, cutter hub moves down, the core of side tool piece 9 machining holes in the end face, and the Outboard Sections that outer side tool piece 8 processing of end face are portalled forms aperture 13.The side of single order cutter piece 7 processes bottom first chamfering 14, and cutter piece outside wedge angle is processed first shoulder hole 15.The side of second order cutter piece 4 processes second chamfering 16 of shoulder hole, and cutter piece outside wedge angle processes second shoulder hole 17, and the cutting at one time of cutter can be finished three straight holes and two chamferings.The cutting fluid that pressurization is discharged in spiral cooling hole 10 is cooled off and is lubricated cutter hub all the time in drilling process, friction between cutter hub and the workpiece is reduced, reduce the thermal deformation and the stress deformation in cutter hub and hole, reduce the wearing and tearing of cutter piece, help the eliminating of drilling cuttings, improve the surface smoothness in hole.Spiral chip flute 6 holds drilling cuttings and cutting fluid in drilling process.

Though; the utility model clearly demonstrates by above embodiment and accompanying drawing thereof; yet under the situation that does not deviate from the utility model spirit and essence thereof; the person of ordinary skill in the field works as can make various corresponding variations and correction according to the utility model, but these corresponding variations and correction all should belong to the protection domain of claim of the present utility model.

Claims

1, a kind of interior cold transposition step drill, it is characterized in that, comprise fixed part and drill body, described drill body is have step cylindrical, described drill body axial cross section outline is stepped, and the external diameter of an end of the close described fixed part of drill body is greater than the external diameter away from fixed part one end; Side tool piece and be used for side tool piece outside the end face in the outside of machining hole in described drill body top is respectively equipped with the end face of the core that is used for machining hole; The stair-stepping jut of described drill body is provided with indexable insert tip, throw away tip; Described drill body surface is provided with two helicla flutes with ccontaining drilling cuttings and cutting fluid, and described drill body also is provided with two threaded hole of the cutting fluid of the certain pressure that is used to annotate.

2, interior cold transposition step drill according to claim 1 is characterized in that, described double helix cooling hole is arranged in the described drill body and along described drill body axial screw extends.

3, interior cold transposition step drill according to claim 1 is characterized in that two helicla flutes on described drill body surface are symmetricly set in described drill body surface, extends along described drill body axial screw.

4, interior cold transposition step drill according to claim 1 is characterized in that described drill body outer surface is provided with two ladders and external diameter reduces successively, and described each stair-stepping jut is respectively equipped with indexable insert tip, throw away tip.

5, cold transposition step drill in according to claim 1 is characterized in that, described fixed part comprises that the location that is arranged at described drill body far-end faces directly, and fixing locating flange.