CN210498487U - Improved cutter for deep-hole double-pipe spray suction drill - Google Patents

Abstract

The utility model discloses a deep hole double-barrelled spray-suction drill improves cutter, including spray-suction drill bit, inner tube and outer tube, wherein spray-suction drill bit inside is a cavity, the cavity is linked together with the inner tube, the inner tube front end is connected with the inside location platform cooperation of spray-suction drill bit, the inner tube tail end is equipped with the negative pressure jet groove, the spray-suction drill bit outside is through square tooth screw thread and outer tube fixed connection, form an annular oil supply channel between inner tube and the outer tube, annular oil supply channel front end is linked together with the oil outlet on the spray-suction drill bit, annular oil supply channel tail end is linked together with the oil inlet, the oil inlet still is linked together with the inner tube afterbody; the diameter of the oil outlet is phi 2-phi 3.2 mm; the diameter of the neck of the spray suction drill bit is phi 15-phi 16 mm; the chip breaking table width value of center blade, middle blade and outer blade is 1.6mm, 1.3mm and 1.2 mm.

Description

Improved cutter for deep-hole double-pipe spray suction drill

Technical Field

The utility model belongs to the solid drilling processing field of deep hole especially relates to a double-barrelled spray suction drill of deep hole improves cutter.

Background

A double-tube spray suction drill is a single-edge self-guiding type inner chip removal deep hole drill. The primary contradiction of using the traditional double-pipe jet-suction drill is whether the cutting edge part can obtain sufficient cutting fluid to smoothly discharge the cutting chips. The design of a double-pipe structure reduces the space of the chip removal channel; the strength of the drill bit can be reduced when the diameter of the oil outlet hole in the front of the drill bit is too large, and the oil outlet area can be reduced when the diameter of the oil outlet hole in the front of the drill bit is too small; the width of a chip breaking table of the drill bit blade is too large, so that coiled chips can be generated during machining, the chips are easy to block, and if the width of the chip breaking table is too small, reel-shaped chips can be generated, so that the service life of a cutting edge is shortened; when the hole depth of the workpiece exceeds 1000mm, the suction effect generated by the inner pipe negative pressure jet groove is reduced, so that the processing depth of the double-pipe jet suction drill is limited within 1000mm no matter the hole diameter.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough of prior art, the utility model provides a double-barrelled spray-suction drill of deep hole improves cutter, can realize the processing of axle type part and well small-size box type part medium-length hole, the structure through to traditional double-barrelled spray-suction drill bit is improved, the blade that causes because stifled bits collapses the sword in the small-size spray-suction drill course of working has been solved, the fracture, the broken scheduling problem, and the restriction of spray-suction drill processing maximum depth 1000mm has been broken through, the maximum drilling depth has reached 1500mm, the deep hole spray-suction drill sword of improved generation has fine popularization nature, can be extensive use in deep-hole machining.

The utility model discloses a double-barrelled spray suction of deep hole bores technical scheme who improves cutter does:

an improved cutter of a deep-hole double-tube spray-suction drill comprises a spray-suction drill bit, an inner tube and an outer tube, wherein a cavity is formed inside the spray-suction drill bit, the cavity is communicated with the inner tube, the front end of the inner tube is connected with a positioning table inside the spray-suction drill bit in a matched mode, a negative pressure injection groove is formed in the tail end of the inner tube, the outer side of the spray-suction drill bit is fixedly connected with the outer tube through square thread, an annular oil supply channel is formed between the inner tube and the outer tube, the front end of the annular oil supply channel is communicated with an oil outlet hole in the spray-suction drill bit, the tail end of the annular oil supply channel is;

the diameter of the oil outlet is phi 2-phi 3.2 mm;

the diameter of the neck of the spray suction drill bit is phi 15-phi 16 mm;

the chip breaking table width value of center blade, middle blade and outer blade is 1.6mm, 1.3mm and 1.2 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model improves the diameter of the oil outlet of the traditional welding type double-pipe spray suction drill bit, and ensures that the cutting oil provided between the inner pipe and the outer pipe is fully discharged in the processing process;

the utility model improves the neck diameter of the traditional welding type double-pipe spray suction drill, thereby changing the oil flow gap leading to the cutting edge part after the cutting oil flows out of the oil outlet hole, and ensuring that the cutting edge part obtains sufficient cutting oil in the processing process;

the utility model changes the width size of the chip breaking table of the blade by sharpening the central blade, the middle blade and the outer blade, ensures that small scrap iron is obtained during processing, and ensures that the scrap iron can be smoothly discharged;

the utility model ensures that the iron scraps are not contacted with the outer baffle edge of the scrap outlet when being bent and broken during processing by finishing the shapes and the sizes of the outer baffle edges of the two scrap outlet;

the utility model discloses broken through the restriction that the maximum depth of processing of spray-suction bores 1000mm, realized that the double-barrelled spray-suction of small-size deep hole bores maximum depth of processing 1500 mm.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the working principle of the double-tube spray suction drill of the present invention;

FIG. 2 is a schematic view of the structure of the ejector drill of the present invention;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a schematic view of the structure of the oil supply passage of the inner and outer pipes of the improved cutter of the double-pipe spray suction drill of the utility model;

FIG. 5 is a schematic structural view of a chip breaking table of the blade of the present invention;

wherein, 1, a workpiece; 2. a jet suction drill bit; 3. a drill rod support; 4. an oil inlet; 5. a negative pressure jet groove; 6. an inner tube; 7. an outer tube; 8. an oil outlet hole; 9. a middle blade; 10. a drill neck; 11. a center blade; 12. an outer blade; 13. a drill pipe connector; 14. a small chip outlet; 15. a chip outlet is enlarged; 16. an oil supply passage; 17. the drill bit is provided with a large opening.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1-5, an improved cutter for deep-hole double-tube spray-suction drill comprises a spray-suction drill bit 2 with a cavity structure inside, an inner tube 6 and an outer tube 7, wherein the front end of the inner tube 6 is connected with a positioning table inside the spray-suction drill bit 2 in a matching manner so as to communicate the inner tube 6 with the cavity, a negative pressure jet groove 5 is arranged at the tail end of the inner tube 6, the front end of the outer tube 7 is fixedly connected with the outer side of the spray-suction drill bit 2 through a thread of a square tooth, the inner tube 6 and the outer tube 7 form a drill rod, an annular oil supply channel 16 is formed between the inner tube 6 and the outer tube 7, when in use, 2/3 cutting fluid reaches the spray-suction drill bit 2 through the annular oil supply channel 16, flows out from an oil outlet 8 on the spray-suction drill bit 2 and is sprayed to a cutting edge along an annular gap at the front ends of the spray-suction drill bit, thereby forming a low-pressure area, increasing the pressure difference before and after the chip removal channel of the inner tube 6, equivalently forming suction force on the throat area of the drill bit, and promoting the cutting fluid to carry the iron chips to be discharged out through the inner tube 6 quickly and smoothly.

In specific implementation, as shown in fig. 1, when the double-pipe spray drill works, a spray drill bit 2 cuts a workpiece 1, a drill rod composed of an inner pipe 6 and an outer pipe 6 is fixed through a drill rod bracket 3, a drill rod connector 13 is arranged at the tail of the drill rod, an oil inlet 4 is arranged on the drill rod connector 13, and the oil inlet 4 is communicated with an annular oil supply channel 16 and a negative pressure injection groove 5 at the tail of the inner pipe 6.

In the concrete implementation, as shown in fig. 1 and 2, be equipped with a plurality of oil outlets 8 on the injection drill bit 2, compare with former oil outlet, the utility model discloses an oil outlet diameter is increaseed to phi 3.2mm by phi 2mm, has guaranteed in the course of working, and the cutting oil of fully discharging by the providing between the interior outer tube, simultaneously the utility model discloses change drill bit neck 10 diameter into phi 15.9mm by phi 16.5mm to after having changed cutting oil outflow oil outlet 8, accesss to the oil flow clearance of cutting edge portion, guaranteed that cutting edge portion obtains sufficient cutting oil in the course of working.

In the concrete implementation, as shown in fig. 2 and 3, the 2 front ends of jet-suction drill bit are equipped with central blade 11, middle blade 9 and outer blade 12 along the direction of radius, constitute blade chip breaking platform, as shown in fig. 5, the utility model discloses a sharpening central blade 11, middle blade 9 and outer blade 12, revise the width size of blade chip breaking platform, make the width reduce 0.2 ~ 0.4mm, consequently central blade 11, middle blade 9 and outer blade 12's chip breaking platform becomes 1.6mm, 1.3mm and 1.2mm respectively, has guaranteed to obtain garrulous little iron fillings man-hour, has guaranteed that iron fillings can smoothly discharge, simultaneously the utility model discloses carry out the sharpening to big bits mouth 15 and little bits mouth 14 according to the chip removal requirement and repairment, when guaranteeing the crooked rupture of processing iron fillings with the outer shelves limit of a chip outlet contactless.

According to the improvement, the utility model discloses can realize minimum drilling diameter phi 18.8mm, drilling maximum depth 1500 mm's drilling requirement.

Taking a jet drill with the drill diameter phi of 18.8mm as an example, as shown in fig. 4, the inner diameter D1 of the outer tube 7 is: φ 12mm, outer diameter D2 of inner tube 6: phi 10mm, diameter D of the large opening of the drill bit 17: phi 16mm, the diameter D3 of the oil outlet hole 8 and the diameter D4 of the drill bit neck 10.

Then the oil passing area between the inner and outer bars is calculated S1: s1 = pi (D1)²-D2²)/4=34.54mm²；

And (5) calculating the sum of the areas of the 6 oil outlet holes S2: s2=6 × pi D3²/4

Bit neck oil passage area calculation S3: s3= pi (D)²-D4²)/4

∵S2≥S1

D3 is more than or equal to 2.71mm, while the diameter of the oil outlet hole of the traditional spray suction drill bit is phi 2mm, and the diameter of the oil outlet hole is phi 3.2mm through modification;

and (B) is not less than S3 and not more than S1

D4 is more than or equal to 14.6 mm, while the diameter of the neck hole of the drill bit of the traditional spray suction drill bit is phi 16.5mm, and the diameter of the neck of the drill bit is phi 15.9mm through modification. According to the above embodiment, the utility model discloses a structure to traditional double-barrelled spray suction drill bit has improved, has increased the oil outlet diameter, has reduced drill bit neck hole diameter, has improved the operating condition of double-barrelled spray suction drill bit for spray suction drill processing maximum depth has broken through 1000 mm's restriction, and the maximum drilling depth has reached 1500 mm.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (1)

1. The improved cutter for the deep-hole double-tube spray drill is characterized by comprising a spray drill bit, an inner tube and an outer tube, wherein a cavity is formed inside the spray drill bit, the cavity is communicated with the inner tube, the front end of the inner tube is matched and connected with a positioning table inside the spray drill bit, a negative pressure injection groove is formed in the tail end of the inner tube, the outer side of the spray drill bit is fixedly connected with the outer tube through square thread, an annular oil supply channel is formed between the inner tube and the outer tube, the front end of the annular oil supply channel is communicated with an oil outlet hole in the spray drill bit, the tail end of the annular oil supply channel is communicated with an oil inlet, and the oil inlet is also communicated with the;

the diameter of the oil outlet is phi 2-phi 3.2 mm;

the diameter of the neck of the spray suction drill bit is phi 15-phi 16 mm;

the chip breaking table width value of center blade, middle blade and outer blade is 1.6mm, 1.3mm and 1.2 mm.

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