CN102107293A - Hard alloy clamp-type replaceable drilling sheet - Google Patents

Abstract

The invention relates to a hard alloy clamp-type replaceable drilling sheet and belongs to home machining in the field of machining. The replaceable drilling sheet is made of a novel hard alloy powder material and adopted to replace the high-speed steel spiral bit which is commonly used in the conventional hole machining process and the single-material high-speed steel replaceable drilling sheet for the internal cooling-type bit, which is claimed in the patent filed by the same inventor (application number: No.94112495.6). The hard alloy clamp-type replaceable drilling sheet is made by press-forming hard alloy powders and then sintering and finishing, and leaves the factory in batch after being inspected to meet the standards. The internal cooling-type hard alloy replaceable drilling sheet comprises a drilling sheet (1), two inner blades (3) arranged on the drilling sheet (1), a groove (4) formed in front of the inner blades, two outer main cutting blades (2) arranged on the drilling sheet (1), two guide blades (5) arranged on the drilling sheet (1), a flat positioning pin (7) clamped on the drilling sheet (1) (as shown in Figure 2), two drainage grooves (6), and two connecting screws (8) connected on the drilling sheet (1) (as shown in Figure 2), wherein a cooling liquid is delivered to the two drainage grooves (6) from the cavity of the flat positioning pin. The hard alloy clamp-type replaceable drilling sheet provides a new approach to the drilling process.

Description

The carbide alloy machine presss from both sides interchangeable brill sheet

The present invention relates to drill bit in boring procedure, adopt the carbide alloy machine to press from both sides interchangeable brill sheet, especially adopt the interchangeable brill sheet of carbide alloy is installed on the interchangeable drilling rod of No. 94112495.9 " internal-cooling bit of drill " that I invent.The interchangeable brill sheet of being inlayed above the drilling rod of cold drill bit in the past, the high-speed steel that all is single machining bores sheet, the interchangeable brill sheet of standard carbide alloy that adopts compacting in enormous quantities to form, the popularization machine presss from both sides interchangeable internal-cooling bit of drill more efficiently, will be to drilling work for coming very high social benefit and economic benefit.

Technical field: the material of present machining cutting element both domestic and external is the cutter that adopts high-speed steel and hard alloy steel two big class materials basically.In twentieth century mid-term, hard alloy cutter improves cutting speed since occurring significantly.The instrument that people wait in expectation this material of carbide alloy is used in the processing work of hole, but this work is never approved, it is too high that its main cause is that whole spiral bit made the carbide drill cost, secondly the chisel edge of spiral bit partly is a negative rake, when drilling, produced the very strong power of offending and disobeying with rude remarks, make the chisel edge of apex point and push up the broken drilling of can not carrying out, thereby in drilling work, can only see whole hard alloy twist drill head of a spot of small dimension at present.

A kind of appearance of novel interchangeable blade tip inner-cooled carbide drill sheet has remedied above shortcoming fully, and its cutting edge replaces the chisel edge of spiral bits with two inner edges, make in the drilling process, reduced axial force, guaranteed the drilling inner edge and by the top not broken, carry out drilling work smoothly.Beating before each size of drill bit and two main cutting edges and two inner edges and the inner edge be recessed, all be before dispatching from the factory producer sharpening become standard type, liberated the workman is difficult for sharpening because of carbide alloy is really up to the mark work.

One piece tens restrains the slight brill sheet that several hectograms do not wait scale, is installed on the machine folder throw away drilling rod, just can replace the drill bit of a priceless big specification, has accomplished to be that the saving of labor is laborsaving again, economizes high steel alloy again.

It is recessed that the brill sheet back side has draining, makes cooling fluid be delivered directly to apex point, played unprecedented cooling effect.

People will see soon, and the interchangeable brill sheet of various machines folder throw away carbide alloy in company with the drilling rod of throw away all size, occurs on market simultaneously, and a kind of revolution of spiral bit of new throw away machine stick of tool head is from China's upgrowth.

Background technology: the appearance of the interchangeable brill sheet of carbide alloy is not accidental, be me at " internal-cooling bit of drill " of disclosure of the Invention in 1994, it is required and trial-production produces in practice is promoted, the brill sheet of this invention of Cai Yonging in the past, all adopt the high-speed steel turnning and milling to form, one piece slight brill sheet will have blanking unexpectedly, car, mill, mill, bore, working procedures such as quenching produce, man-hour is long and be difficult to reach standard, be unfavorable for promoting widely this invention, thereby force the inventor in constantly design test, through research for a long time, a kind of throw away carbide alloy machine presss from both sides interchangeable brill sheet trial-production and forms.The carbide drill sheet of a kind of machined steel of energy respectively, cast iron (copper) two big class unlike materials will occur on market soon in the future.

Summary of the invention: a kind of brill sheet that is installed in cold machine stick of tool bar in the different size, its thickness is with several millimeters to tens millimeters, be installed in the unified design processing of portion size that the drilling rod of required specification is inlayed, the specification that the height of brill sheet is pressed drilling rod does not wait, by the standard production height is nearly ten millimeters standard carbide drill sheets to 30 millimeters all sizes that do not wait, boring the cutting angle of sheet is made up of two inner edges and two outer main cutting edges, beat the recessed positive rake angle of having obtained before the inner edge, originally squeezed broken iron filings in the chisel edge drilling and make here, form two lands that inner edge gets out, from recessed, discharge smoothly, reach cooling simultaneously, cooling increases cutter life.

On the brill sheet two connecting holes are arranged, available bolt is fastenedly connected the brill sheet what drilling rod that alignment pin is positioned on the drilling rod.

Its making is the shrinkage ratio of elder generation by each several part, calculate and make pole plate accurately, to make the pole plate of specification with electric spark and get the mould that required specification is bored sheet, dose and calculate good your required cemented carbide powder of selecting by Material Processing, carry out hydraulic press compression moulding, carry out the high temperature furnace sintering in batches.The carbide drill sheet of coming out of the stove is carried out the sharpening test package to dispatch from the factory.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is installed in the schematic diagram on the cold interchangeable drilling rod in the same specification for the present invention.

Among Fig. 1:

The 1st, the carbide alloy machine presss from both sides interchangeable brill sheet, it is with the cemented carbide powder sinter molding, press from both sides interchangeable brill sheet through the reconditioning machine of forming, bore sheet and have multiple functional characteristics such as hardness height, interchangeable, interior cold, blade tip positive rake angle, the user can be without any reconditioning, clamping in same specification on the cold interchangeable drilling rod Fig. 2 can use.

The 2nd, bore two main cutting edges on the sheet, it is equivalent to the effect of spiral bit main cutting edge.

The 3rd, two inner edges of brill sheet have replaced the chisel edge of spiral bit to reduce the axial force of offending and disobeying with rude remarks of drilling work with these two inner edges.

The 4th, recessed before the inner edge, because the recessed degree of depth, make inner edge obtain positive rake angle, solved spiral bit and partly can not find the theory of positive rake angle at chisel edge, the cutting of these two positive angle inner edges makes original chisel edge form banded sword generation at these broken iron filings in top, smoothly from recessed discharge, reduce the axial force of cutting, reduced the cutting heat, increased cutter life.Can adopt the drilling of carbide drill sheet for this reason, theoretical foundation is provided and put into practice available effect.

5 is two drilling guiding swords, and its effect is equivalent to two guiding swords of spiral bit.

The 6th, two water fillings on the knife back are recessed, and cooling fluid can arrive here through the water filling port 6 of Fig. 2, to apex point drilling part, makes drilling work be in the state of cooling all the time the cooling fluid direct sending.

The 7th, oblate alignment pin, by alignment pin with the connection of drilling rod locating hole to guarantee the error of located lateral, the sprocket hole of cooling fluid by drilling rod directly is transported to apex point with liquid from two rhones to the space of flat type alignment pin simultaneously.

8 are two connects fastening bolt hole, will bore sheet by this two hole with bolt and be connected on the knife bar.

The 9th, the space of drilling rod and alignment pin, from then on liquid be transported to the brill sheet.

The 10th, the locating hole on the drilling rod.

The A face is the axial force that is produced when guaranteeing drilling.

The B face is the cross force that is produced when guaranteeing drilling.

The specific embodiment: at first choose powder, particularly will come the brill sheet of press process carbon steel with the high cemented carbide powder of toughness at the carbide alloy of processing carbon steel and cast iron (copper) two big class materials.

Carry out the pressing mold of all size, the size of pressing mold will be calculated shrinkage ratio, after the moulding that is pressed into bored sheet and deliver to high temperature furnace and carry out sintering, carry out the reconditioning at each position, be installed on the drilling rod of same specification and carry out cutting tests of drilling, in large-scale factories and miness test, listen to consumers' opinions, open expert discussion, product evaluation meeting.

Certified product is packaged into market, does various promotional well, participate in various trade fairs, the network propaganda is set up in the meeting for the placement of orders, adopts both at home and abroad up to society, for the drilling cause contributes.

Claims (8)

1. be that a kind of carbide alloy machine presss from both sides interchangeable brill sheet, it is to be formed by cemented carbide powder compacting, sintering, reconditioning.

2. be two outer main cutting edges.

3. be two inner edges.

4. be beat before two inner edges recessed.

5. be two guiding swords.

6. be that two drainings are recessed.

7. but be the flat type alignment pin that is fixed on the changing knife rod.

8. but being two will bore sheet and be connected connecting screw hole on the changing knife rod.

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