CN2235346Y

CN2235346Y - No grind drilling machine with central cooling

Info

Publication number: CN2235346Y
Application number: CN 95218350
Authority: CN
Inventors: 张红旗
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-09
Filing date: 1995-08-09
Publication date: 1996-09-18
Anticipated expiration: 2005-08-09

Abstract

The utility model relates to a drilling cutting tool used in the machine-tooled industry, particularly a no grind centre cooling bit, which separates a drill head from a drill clamp. A through slot clamping the drill head is opened at the top of the drill clamp. A locating pin is installed in the center of the through slot, and two symmetrical fastening screw holes are opened at the top of the drill clamp. A locating slot and two fastening holes are opened at the relevant positions of the drill head. The drill head and the drill clamp are mechanically clamped to form a whole to complete the cutting work. A cooling hole is opened on the drill clamp to cause coolant with limited pressure to directly act on a cutting edge part to enhance the drilling cutting speed. The utility model saves cutting tool materials and does not need to be reground, the cooling effect is good, the drilling precision is high, and the service life of the drill head is long. The no grind centre cooling bit can be widely used in the machine-tooled industry.

Description

The cooling of throw away center is bored

The utility model relates to the boring cutlery that a kind of machining industry is used.

Traditional drill bit that is used for machining industry mostly is the fluted drill that the high-speed tool steel with one is made, and band center cooling hole, and cooling mainly is to rely on outside pouring to carry out, and blade is with needing sharpening again after blunt; The drill bit that some adopts carbide alloy to make is with the mode of welding, and drill bit is welded on the drilling rod, and drilling rod can not be reused.Need hold integral body sharpening again when blunt.And the hole is not cooled off at the band center.

The purpose of this utility model provides a kind ofly can change the bit cutting blade, saves cutter material, and cooling fluid is directly acted on the cutting blade, thus the boring cutlery of increasing work efficiency.

For achieving the above object, the utility model has adopted following design:

The drill point part: a drill point 6, cross the groove 10 that the center of circle has clamping drill bit 1 at an end of drill point 6; The center of groove 10 studs with center rationed marketing 3, in the end of drill point 6 with the axial line symmetry have the

screw

2 and 2 of fixed drill bit 1 '; Have center cooling through hole 4 at drill point 6 centers, oblique two holes 4 that have a symmetry on top, groove 10 both sides ' cool off through hole 4 with the center to communicate; On drill point 6, have the helicla flute 5 of two chip removals; Radially have the liquid-entering hole 7 that communicates with center cooling through hole 4 in the afterbody lower end of helicla flute 5; The afterbody of drill point 6 is taper shanks 8.

Bit part: with the top center line symmetry of drill bit have two fastener holes 11 and 11 '; On drill bit bottom centre line, have centralized positioning groove 12; On drill bit two outsides, have guiding land 13; On the drill bit corner angle staff, have cutting edge 14; Have chip-breaker 15 in cutting edge 14 lower ends

Two trip bolts 9 and 9 '.

The centralized positioning pin of described drill bit 1 bottom centre's locating slot 12 and the groove 10 of drill point 6 aligns and is loaded in the groove 10, with the fastener hole 11 and 11 on screw 9 and 9 ' mistake drill bit 1 ' with drill point 6 on screw 2 and 2 ' tighten, it is become one.Drill bit is with changing at any time after blunt.

The cooling of the utility model throw away center is bored and is than traditional fluted drill advantage:

The first, traditional fluted drill integral body all is to make with high-speed tool steel, and the utility model to be cutting tip use high-speed steel to make, than the little manyfold of fluted drill of same diameter.So can save a large amount of high-speed steel raw material.

The second, the cutting blade of fluted drill is used when blunt, needs integral body to take off, and sharpening is installed again again, adjusts and uses, and loses time, and bit change can use and the utility model only needs more.Reduce downtime.

Three, fluted drill does not have cooling hole, center, and main outer the pouring of cooling carried out.And the utility model has center cooling through hole on drill point, makes the cooling fluid of certain pressure directly act on two cutting edges, helps the discharge of iron filings.Thereby improved the cutting speed of boring, boosted productivity, prolonged the service life of drill bit, improved the fineness and the aperture quality of boring.

Below in conjunction with accompanying drawing, the heavy numb center cooling brill example of the utility model is elaborated.

Accompanying drawing one is the structural representation that the cooling of the utility model throw away center is bored, and is called for short the YH-1 type

Accompanying drawing two is structural representations of the utility model drill bit 1.

Shown in figure one, figure two: cross the groove 10 that the center of circle has clamping drill bit 1 at the top of drill point 6, stud with centralized positioning pin 3 at the center of groove 10.Drill bit 1 bottom centre's locating slot 12 is aligned centralized positioning pin 3 to be loaded in the groove 10 of drill point 6.Again with the fastener hole 11 and 11 on screw 9 and 9 ' process drill bit 1 ' with drill point 6 on screw 2 and 2 ' tighten.Make it to become one.During operation, the taper shank 8 of drill point 6 is installed on the drilling machine, cooling fluid is through the cooling fluid hand-hole on the drill point 67 and center cooling through hole 4 and 4 ' connection.Make the cooling fluid of certain pressure directly act on two cutting blades 14, during boring, iron filings fracture through chip-breaker 15.Iron filings are discharged smoothly through chip area 5 under the cooling fluid effect that pressure is arranged, and the guiding land 13 on the drill bit 1 is used to guarantee drilling accuracy.

Claims

1. cobalt is cooled off at a throw away center, and it comprises: a drill point 6: cross the groove 10 that the center of circle has clamping drill bit 1 at an end of drill point 6,

Stud with centralized positioning pin 3 at the center of groove 10;

Have the screw of fastening drill bit 1 with the axial line symmetry in the end of drill point 6

2 and 2 ', have center cooling through hole 4 at drill point 6 centers, logical

Top, groove 10 both sides is oblique have two symmetrical holes 4 ' with the cooling through hole

4 communicate;

On drill point 6, have the helicla flute 5 of two chip removals, at the spiral fluted tail

Subordinate's end radially has the liquid-entering hole 7 that communicates with center cooling through hole 4;

Afterbody at drill point 6 is a taper shank 8.A drill bit 1: with drill bit 1 drift angle center line symmetry have two fastener holes 11 and 11 ';

On drill bit 1 bottom centre's line, have centralized positioning groove 12;

On two outsides of drill bit 1, have guiding land 13; At drill bit 1

Drift angle to the land 13 that leads has cutting edge 14, at cutting edge 14

The lower end have chip-breaker 15; Two screws 9 and 9 '.It is characterized in that:

The end centralized positioning groove 12 of described drill bit 1 aligns with the centralized positioning pin 3 of drill point 6 and is loaded in the groove 10, with the fastener hole 11 and 11 on screw 9 and 9 ' mistake drill bit 1 ' with drill point 6 on screw 2 and 2 ' tighten.

The center of described drill point 6 has two oblique holes 4 on center cooling through hole 4 and top, groove 10 both sides ' communicate, and radially has liquid-entering hole 7 in the lower end of helicla flute 5 and cools off through hole 4 with the center and communicate.