CN213104272U

CN213104272U - Deburring extrusion screw tap

Info

Publication number: CN213104272U
Application number: CN202021443226.6U
Authority: CN
Inventors: 李辉; 李志轩; 李明轩
Original assignee: Dongguan Subote Hardware Technology Co ltd
Current assignee: Dongguan Subote Hardware Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-05-04
Anticipated expiration: 2030-07-21

Abstract

The utility model provides a burring extrusion screw tap, be in including screw tap pole, connection the arris stalk portion of screw tap pole one end, connection are in the screw thread portion of arris stalk portion one end, arris stalk portion with be equipped with first oil groove, second oil groove in the screw thread portion, have plane end, cambered surface end on the arris stalk portion, per two are adjacent the plane end with form a arris limit end between the cambered surface end, the quantity of arris limit end is 4 ~ 16. The utility model discloses a burring extrusion screw tap can improve the problem that has the burr on the internal thread.

Description

Deburring extrusion screw tap

Technical Field

The utility model relates to a screw tap technical field, concretely relates to burring extrusion screw tap.

Background

The extrusion screw tap is a novel thread tool for processing internal threads by utilizing the metal plastic deformation principle, the extrusion screw tap extrusion internal threads are a chipless processing technology, and the extrusion screw tap extrusion internal threads are particularly suitable for copper alloy and aluminum alloy with lower strength and better plasticity, can also be used for tapping materials with low hardness and large plasticity, such as stainless steel, low-carbon steel and the like, and have long service life. The screw thread extruded by the extrusion screw tap has high surface smoothness, the metal fiber of the screw thread cannot be broken, and a cold-hard layer is formed on the surface, so that the strength and the wear resistance of the screw thread can be improved. The prior art extrusion taps, which are generally provided with a threaded portion for extrusion and a round shank, have a major drawback in that burrs are generally generated on internal threads of a machined workpiece.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a burring extrusion screw tap can improve the problem that has the burr on the internal thread.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a burring extrusion screw tap, includes the screw tap pole, connects the arris stalk portion of screw tap pole one end, connects the screw thread portion of arris stalk portion one end, arris stalk portion with be equipped with first oil groove, second oil groove on the screw thread portion, have plane end, cambered surface end on the arris stalk portion, per two adjacent the plane end with form an arris limit end between the cambered surface end, the quantity of arris limit end is 4 ~ 16.

Specifically, the plane end includes first plane, second plane, third plane, fourth plane, the cambered surface end includes first arcwall face, second arcwall face, first oil groove is located between first plane and the second plane, the second oil groove is located between the third plane and the fourth plane, the quantity of arris limit end is 4, the arris limit end includes the first edge that first plane with the juncture of second arcwall face formed, the second edge that the juncture of second plane with first arcwall face formed, the third edge that the juncture of first arcwall face with the third plane formed, the fourth edge that the juncture of fourth plane with the second arcwall face formed.

Specifically, screw thread portion includes a plurality of extrusion modules, extrusion module includes first linear arris, second linear arris, first arc arris, third linear arris, fourth linear arris, second arc arris, first oil groove is located first linear arris with between the second linear arris, the second oil groove is located third linear arris with between the fourth linear arris.

Specifically, a through hole is formed in the middle of the handle part and the threaded part.

Specifically, the cross section of the ridge handle portion in the axial direction is set to be a first cutting plane, a line formed by the first edge and the center of the through hole is a first auxiliary line, an included angle formed by the first auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove is 45 degrees, a line formed by the second edge and the center of the through hole is a second auxiliary line, an included angle formed by the second auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove is 45 degrees, a line formed by the third edge and the center of the through hole is a third auxiliary line, an included angle formed by the third auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove is 45 degrees, a line formed by the fourth edge and the center of the through hole is a fourth auxiliary line, and an included angle formed by the fourth auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove is 45 degrees.

Specifically, the length of the prism part is four times of the length of the thread part.

Specifically, the length of the handle part is 17.6mm, and the length of the thread part is 4.4 mm.

The utility model has the advantages that:

the utility model discloses a burring extrusion screw tap has formed a plurality of edges on the arris portion, utilizes a plurality of edges at the extrusion with move back twice corrective action of sword in-process internal screw thread, can maintain the internal thread surface burr that forms with processing and get rid of, the internal thread surfacing that forms does not have the burr.

Drawings

Fig. 1 is a schematic structural view of the deburring extrusion tap of the present invention.

Fig. 2 is a cross-sectional view taken along the plane a-a in fig. 1.

FIG. 3 is a cross-sectional view of a prism portion in example 1.

Fig. 4 is a perspective view of the shank portion and the threaded portion in example 1.

Fig. 5 is a schematic view of a process of machining a workpiece using the deburring extrusion tap of the present invention.

FIG. 6 is a cross-sectional view of a prism portion in example 2.

FIG. 7 is a cross-sectional view of a prism portion in example 3.

The reference signs are: the thread rod comprises a thread rod body 1, a handle part 2, a first plane 21, a second plane 22, a first arc-shaped surface 23, a third plane 24, a fourth plane 25, a second arc-shaped surface 26, a first edge 201, a second edge 202, a third edge 203, a fourth edge 204, a thread part 3, an extrusion module 31, a first oil groove 4, a second oil groove 5, a through hole 6, a workpiece 7, a fifth edge 8 and a sixth edge 9.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Example 1

Referring to FIGS. 1-5: a deburring extrusion tap comprises a tap rod 1, a handle part 2 connected to one end of the tap rod 1, and a threaded part 3 connected to one end of the handle part 2, wherein the threaded part 3 comprises a plurality of extrusion modules 31, each extrusion module 31 comprises a first linear ridge, a second linear ridge, a first arc ridge, a third linear ridge, a fourth linear ridge and a second arc ridge, a first oil groove 4 is formed between the first linear ridge and the second linear ridge, a second oil groove 5 is formed between the third linear ridge and the fourth linear ridge, a first oil groove 4 and a second oil groove 5 are formed in the handle part 2 and the threaded part 3, the handle part 2 is provided with a first plane 21, a second plane 22, a first arc-shaped surface 23, a third plane 24, a fourth plane 25 and a second arc-shaped surface 26, the first oil groove 4 is formed between the first plane 21 and the second plane 22, the second oil groove 5 is formed between the third plane 24 and the fourth plane 25, the first edge 201 is formed at the junction of the first plane 21 and the second arc-shaped surface 26, the second edge 202 is formed at the junction of the second plane 22 and the first arc-shaped surface 23, the third edge 203 is formed at the junction of the first arc-shaped surface 23 and the third plane 24, the fourth edge 204 is formed at the junction of the fourth plane 25 and the second arc-shaped surface 26, in the actual processing process, the inner side of the workpiece 7 forms an internal thread after being extruded and moved through the thread part 3, but the end part of the internal thread can be provided with burrs, the deburring extrusion tap deburring process is shown in fig. 5, after the internal thread is manufactured through extrusion and movement of the thread part 3, the end part of the internal thread is corrected for the first time by the four edges of the handle part 2, then the end part of the internal thread is corrected for the second time by the four edges of the handle part 2 in the tool withdrawal process, and the corrected surface.

Preferably, a through hole 6 is further formed in the middle of the prism portion 2 and the threaded portion 3.

Preferably, the cross section of the handle portion 2 in the axial direction is a first cutting plane, a line formed by the first edge 201 and the center of the through hole 6 is a first auxiliary line, an included angle formed by the first auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove 4 is 45 °, a line formed by the second edge 202 and the center of the through hole 6 is a second auxiliary line, an included angle formed by the second auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove 4 is 45 °, a line formed by the third edge 203 and the center of the through hole 6 is a third auxiliary line, an included angle formed by the third auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove 4 is 45 °, a line formed by the fourth edge 204 and the center of the through hole 6 is a fourth auxiliary line, and an included angle formed by the fourth auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove 4 is 45 °.

Preferably, the length of the shank portion 2 is four times that of the threaded portion 3, and the length of the shank portion 2 is increased, so that the shank portion 2 can still correct the formed internal thread when the threaded portion 3 is used for processing deeper through holes or blind holes.

Preferably, the length of the shank portion 2 is 17.6mm and the length of the screw portion 3 is 4.4 mm.

Example 2

Referring to fig. 1, 5 and 6: a deburring extrusion tap comprises a tap rod 1, a handle part 2 connected to one end of the tap rod 1 and a thread part 3 connected to one end of the handle part 2, wherein a first oil groove 4 and a second oil groove 5 are formed in the handle part 2 and the thread part 3, the handle part 2 is provided with a plane end and an arc surface end, a fifth edge 8 is formed between every two adjacent plane ends and arc surface ends, the number of the fifth edges 8 is 6, in the actual processing process, a workpiece 7 forms an internal thread after being extruded and moved through the thread part 3, but the end part of the internal thread has burrs, the deburring extrusion tap deburring process is shown in figure 5, after the thread part 3 is extruded and moved to manufacture the internal thread, six fifth edges 8 of the handle part 2 perform first correction on the end part of the internal thread, and then six fifth edges 8 of the handle part 2 perform second correction on the end part of the internal thread in the cutter withdrawing process, the corrected end surface of the internal thread is smooth and burr-free.

Example 3

Referring to fig. 1, 5 and 7: a deburring extrusion tap comprises a tap rod 1, a handle part 2 connected to one end of the tap rod 1 and a thread part 3 connected to one end of the handle part 2, wherein a first oil groove 4 and a second oil groove 5 are formed in the handle part 2 and the thread part 3, the handle part 2 is provided with a plane end and an arc surface end, a sixth edge 9 is formed between every two adjacent plane ends and arc surface ends, the number of the sixth edges 9 is 8, in the actual processing process, a workpiece 7 forms an internal thread after being extruded and moved through the thread part 3, but the end part of the internal thread has burrs, the deburring extrusion tap deburring process is shown in figure 5, after the thread part 3 is extruded and moved to manufacture the internal thread, eight sixth edges 9 of the handle part 2 perform first correction on the end part of the internal thread, and then eight sixth edges 9 of the handle part 2 perform second correction on the end part of the internal thread in the cutter withdrawing process, the corrected end surface of the internal thread is smooth and burr-free.

The above examples only represent 3 embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a burring extrusion screw tap, its characterized in that includes screw tap pole (1), connects ridge shank portion (2), the connection of screw tap pole (1) one end are in screw thread portion (3) of ridge shank portion (2) one end, ridge shank portion (2) with be equipped with first oil groove (4), second oil groove (5) on screw thread portion (3), have plane end, cambered surface end on ridge shank portion (2), every two are adjacent the plane end with form a ridge end between the cambered surface end, the quantity of ridge end is 4 ~ 16.

2. A deburring extrusion tap according to claim 1 wherein said planar ends comprise a first planar surface (21), a second planar surface (22), a third planar surface (24), a fourth planar surface (25), said arcuate ends comprise a first arcuate surface (23), a second arcuate surface (26), said first oil groove (4) is located between said first planar surface (21) and said second planar surface (22), said second oil groove (5) is located between said third planar surface (24) and said fourth planar surface (25), said edge ends are 4 in number, said edge ends comprise a first edge (201) formed at the interface of said first planar surface (21) and said second arcuate surface (26), a second edge (202) formed at the interface of said second planar surface (22) and said first arcuate surface (23), a third edge (203) formed at the interface of said first planar surface (23) and said third planar surface (24), an arcuate edge (203), A fourth edge (204) formed at the intersection of the fourth plane (25) and the second arcuate surface (26).

3. A deburring extrusion tap according to claim 2 wherein said threaded portion (3) comprises a plurality of extrusion modules (31), said extrusion modules (31) comprising a first linear ridge, a second linear ridge, a first arcuate ridge, a third linear ridge, a fourth linear ridge, a second arcuate ridge, said first oil groove (4) being located between said first linear ridge and said second linear ridge, said second oil groove (5) being located between said third linear ridge and said fourth linear ridge.

4. A deburring press tap according to claim 2 wherein said shank portion (2) and said threaded portion (3) are further provided with a through hole (6) in the middle.

5. A deburring extrusion tap according to claim 4 wherein the cross section of the land portion (2) in the axial direction is set to a first cutting plane, the line formed by the first edge (201) and the center of the through hole (6) is a first auxiliary line, the first auxiliary line forms an angle of 45 ° with the perpendicular bisector of the bottom surface of the first oil groove (4), the line formed by the second edge (202) and the center of the through hole (6) is a second auxiliary line, the second auxiliary line forms an angle of 45 ° with the perpendicular bisector of the bottom surface of the first oil groove (4), the line formed by the third edge (203) and the center of the through hole (6) is a third auxiliary line, the angle formed by the third auxiliary line and the perpendicular bisector of the bottom surface of the first oil groove (4) is 45 °, and the line formed by the fourth edge (204) and the center of the through hole (6) is a fourth auxiliary line, the fourth auxiliary line forms an included angle of 45 degrees with a perpendicular bisector of the bottom surface of the first oil groove (4).

6. A deburring extrusion tap according to claim 2 wherein the length of the land portion (2) is four times the length of the threaded portion (3).

7. A deburring extrusion tap according to claim 6 wherein the length of said shank portion (2) is 17.6mm and the length of said threaded portion (3) is 4.4 mm.