CN209998502U

CN209998502U - butt welding type small-diameter PCD extrusion tap

Info

Publication number: CN209998502U
Application number: CN201920181999.2U
Authority: CN
Inventors: 陆海钰
Original assignee: Shanghai Reputation And Jewelling Tool Co Ltd
Current assignee: Shanghai Reputation And Jewelling Tool Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2020-01-31
Anticipated expiration: 2029-02-01

Abstract

The utility model discloses an butt welding formula minor diameter PCD thread extrusion tap, including handle of a knife and PCD thread extrusion tap, its characterized in that, PCD thread extrusion tap with welded connection between the handle of a knife, its characterized in that, PCD thread extrusion tap with the face of weld between the handle of a knife by two with the central axis of handle of a knife becomes 45 inclined planes and constitutes, the utility model discloses longe-lived, the tool changing time reduces, and production efficiency is high, and processingquality is stable, and reduction in production cost is very showing.

Description

butt welding type small-diameter PCD extrusion tap

Technical Field

The utility model relates to a cutter field especially relates to butt welding formula minor diameter PCD extrusion screw taps.

Background

In the modern manufacturing fields of aerospace, automobiles, medical instruments, photoelectrons, computers, sensors, precision machinery, radars, rocket gyros, optics, molds, communication and the like, small threaded holes are often processed, and strict requirements on strength and smoothness are particularly provided for processing threaded holes of parts with high safety requirements. Because the metal fiber is cut off in the process of processing and forming the thread by the common cutting screw tap, the allowable tension and the allowable deformation of the threaded hole processed by the cutting screw tap are greatly influenced by tests and calculations. For this reason, taps with extruded threads began to emerge in the 90 s of the last century. The principle of the extrusion forming of the screw thread is that metal flows towards the thread form direction of the screw tap under the action of extrusion force, so that metal fibers of the threaded hole are not cut off, the deformation resistance strength and the surface hardness of the threaded surface are greatly improved, and the safety of the connection strength of the screw hole and the screw (bolt) is also obviously improved, so that the screw thread is very suitable for occasions sensitive to vibration, such as airplanes, oceans, automobiles, radars, sensors and the like. At present, the extrusion screw tap is usually manufactured by high-speed steel or hard alloy (coating), and the main defects are quick abrasion, short service life, poor precision and high cost.

The present invention has been advantageously explored and attempted to solve the above problems, and it is against this background that the solutions described below have been made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the not enough and defect to prior art and provide butt welding formula minor diameter PCD extrusion screw taps.

The utility model provides a technical problem can adopt following technical scheme to realize:

butt welding type small-diameter PCD thread pressing tap comprises a handle and a PCD thread pressing tap, the PCD thread pressing tap is connected with the handle in a welding mode, and the butt welding type small-diameter PCD thread pressing tap is characterized in that a welding surface between the PCD thread pressing tap and the handle is formed by two inclined surfaces which form an angle of 45 degrees with the central axis of the handle.

In preferred embodiments of the present invention, two inclined planes forming 45 ° with the axis of the handle intersect on the central axis of the handle.

In preferred embodiments of the present invention, the tool shank consists of a shank and a pyramid, and the pyramid is welded to the PCD tap.

In the preferred embodiments, the taper angle of the taper is 20 °.

In preferred embodiments, the extrusion tap comprises an extrusion pyramid, a calibration portion and a back taper, wherein the back taper is welded to the pyramid, and the taper angle of the back taper is 45 °.

In the utility model discloses preferred embodiments, three edges and three oilhole have been evenly distributed to circumference on the outer peripheral face of calibration portion, wherein every oilhole differs 60 with two adjacent edges.

The utility model discloses preferred embodiments, the width of edge is 0.2 ~ 0.6mm, and two-way relief grinding volume K is 0.067 phi M, and wherein phi M is PCD extrusion tap major diameter.

In the utility model discloses preferred embodiments, the length of extrusion pyramid is 2 times extrusion pyramid's screw tap pitch, the length of calibration portion is 8 ~ 10 times extrusion pyramid's screw pitch.

In preferred embodiments of the present invention, the extrusion pyramid has an extrusion taper angle Kl1 of 4 ° or 10 ° and a tap tooth form angle θ of 60 ° or 55 °.

In the preferred embodiments of the present invention, the last 3 ~ 4 full teeth of the extruded pyramid are made into the inverted cone shape of 0.1 ~ 0.15/100.

Due to the adoption of the technical scheme, the beneficial effects of the utility model reside in that:

1. the utility model discloses weld PCD extrusion tap at the cutting position of handle of a knife with vacuum welding's method, the welding face is two 45 inclined planes, it is very firm, PCD material of PCD extrusion tap directly extrudees the processing to the work piece, because PCD material is under high temperature (1300 ~ 1560 ℃) high pressure (7 ~ 8GPa), formed the diamond micrite, and by metal Co, Ni etc. bonding sintering body, hardness can reach HV6000 ~ 8000, heat resistance can reach 800 ℃, its hardness is 3 ~ 10 times higher than carbide, wear and tear much more slowly for high-speed steel or carbide, the durability of cutter can improve 5 ~ 10 times, the tool changing time has been practiced thrift, manufacturing cost has been reduced, the extrusion's screw tooth form is complete, the surface is bright and clean, surface roughness can stabilize and reach Ra and is less than or equal to 0.4 ~ 0.2 mu m, cutting tap just can reach 1.6 ~ 0.8 mu m as usual, than the cutting tap, because the work hardening that extrusion arouses, screw surface hardness can improve 50 at least.

(2) The utility model discloses a brazing type PCD extrusion tap specification range is M0.8 ~ M4, consequently the utility model discloses progress to advancing modern manufacturing well high strength minor diameter internal thread precision finishing technique has effect of deciding.

(3) The utility model can be applied to various knife handle structures (straight handle, 7:24 taper handle, Morse taper handle and HSK high-speed cutting knife handle, etc.) to meet the needs of various machine tool main shaft interfaces;

(4) the welding surface between the PCD extrusion screw tap and the handle of the utility model is composed of two inclined planes which form an angle of 45 degrees with the central axis of the handle of the knife, thereby increasing the welding area and improving the welding strength;

(5) the utility model discloses a PCD material can select for use diamond grain diameter's size according to the physics mechanical properties such as the hardness of work piece, intensity, toughness, coefficient of heat conductivity in a flexible way.

(6) The utility model discloses a geometric parameters can be according to work piece material rational design, by five numerical control tool grinding machines and seven numerical control linkage five laser cutting edge processing machines's software support processing.

(7) The utility model can process non-ferrous metal plastic materials such as titanium alloy, aluminum and its alloy, copper and its alloy, etc.

(8) The utility model can be applied to a machining center and a combined machine tool with enough rigidity;

(9) the utility model has the advantages that the processed threaded hole has high comprehensive quality, the surface roughness Ra is less than or equal to 0.4-0.2 mu m, the tooth form is complete and smooth, the accumulated error of the thread pitch is small, and the threaded connection strength is high;

(10) the utility model discloses longe-lived, the tool changing time reduces, and production efficiency is high, and processingquality is stable, and reduction in production cost is very showing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic welding view of butt-welded small-diameter PCD taps of the present invention.

Fig. 2 is a schematic structural diagram of kinds of butt welding type small-diameter PCD helical reamers of the present invention.

Fig. 3 is a sectional view B-B of fig. 2.

Fig. 4 is an enlarged schematic view at I of fig. 2.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further illustrated in below.

Referring to fig. 1-4, there is shown butt-welded, small diameter PCD tap press comprising a shank 100 and a PCD tap 200.

The tool holder 100 is composed of a shank 110 and a taper 120, the taper 120 having a taper angle of 20 °. The extrusion tap 200 is comprised of an extrusion pyramid 210, a calibrated portion 220, and a reverse taper 230.

The taper angle of the reverse taper 230 is 45 ° and the reverse taper is welded to the taper 120 by vacuum welding, so that the welding surface between the reverse taper 230 and the taper 120 is formed by two

inclined surfaces

231, 232 forming 45 ° with the central axis of the tool holder 100. Two

inclined surfaces

231, 232 at 45 ° to the central axis of the tool shank 100 intersect at the central axis 130 of the tool shank 100.

Three edges 221 and three oil holes 222 are uniformly distributed on the outer circumferential surface of the calibration part 220 in the circumferential direction, wherein the difference between each oil hole 222 and two adjacent edges 221 is 60 degrees. The width of the land 221 is 0.2-0.6 mm, and the bidirectional relief amount K is 0.067 Φ M, where Φ M is the major diameter of the PCD tap 200.

The extruded pyramid 210 has a length 2 times the tap pitch P of the extruded pyramid 210 and has an extrusion cone angle Kl1 of either 4 ° (no through holes machined) or 10 ° (through holes machined). The tap tooth angle theta of the extruded pyramid is 60 deg. or 55 deg.. The final 3-4 full teeth of the extruded pyramid 210 are made into a reverse taper shape of 0.1-0.15/100 to reduce friction.

The length of the calibration part 220 is 8-10 times of the pitch P of the extruded pyramid.

The knife handle is a straight handle or a Morse taper handle or a 7:24 taper handle or a 1:10 short taper hollow handle of a high-speed cutting knife handle.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1, butt welding formula minor diameter PCD squeeze tap, including handle of a knife and PCD squeeze tap, PCD squeeze tap with welded connection between the handle of a knife, its characterized in that, PCD squeeze tap with the face of weld between the handle of a knife by two with the central axis of handle of a knife becomes 45 inclined planes and constitutes.

2. The butt welded, small diameter PCD extrusion tap according to claim 1, wherein two chamfers meeting at 45 ° to the axis of the shank intersect at the central axis of the shank.

3. The butt-welded, small-diameter PCD tap according to claim 1, wherein the shank consists of a shank, a taper, and the taper is welded to the PCD tap.

4. The butt welded, small diameter PCD extrusion tap according to claim 3, wherein the taper angle of the taper is 20 °.

5. The butt-welded, small-diameter PCD extrusion tap according to claim 3, wherein the extrusion tap is comprised of an extrusion pyramid, a calibrated portion, and a reverse taper, wherein the reverse taper is in welded connection with the tapered portion, and wherein the taper angle of the reverse taper is 45 °.

6. The butt-welded small-diameter PCD tap according to claim 5, wherein three edges and three oil holes are uniformly distributed on the outer peripheral surface of the calibrating section, and each oil hole is different from two adjacent edges by 60 °.

7. The butt-welded small-diameter PCD tap press of claim 6, wherein the width of the land is 0.2-0.6 mm, the bidirectional relief K is 0.067 Φ M, where Φ M is the major diameter of the PCD tap press.

8. The butt-welded small diameter PCD extrusion tap according to claim 7, wherein the extrusion pyramid has a length of 2 times the tap pitch of the extrusion pyramid and the calibration portion has a length of 8 to 10 times the tap pitch of the extrusion pyramid.

9. The butt-welded small-diameter PCD extrusion tap according to claim 8, wherein the extrusion pyramid has an extrusion taper angle Kl1 of 4 ° or 10 °, and the extrusion pyramid has a tap profile angle θ of 60 ° or 55 °.

10. The butt welded small diameter PCD extrusion tap according to claim 9, wherein the last 3 to 4 full teeth of the extrusion pyramid are formed in the shape of an inverted cone of 0.1 to 0.15/100.