CN211966222U

CN211966222U - Positioning screw tap

Info

Publication number: CN211966222U
Application number: CN202020427267.XU
Authority: CN
Inventors: 张唐; 王晓婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-11-20
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a location screw tap, including stalk portion, calibration part, cutting part and location end, the stalk portion front end is connected with the calibration part of diameter increase, and calibrates the cutting part that the part front end was provided with round platform shape, and the cutting part front end is provided with the location end, and the location end can insert in the inside through-hole of machined part, and the cutting part carries out cutting work to the through-hole, the cutting part outside evenly is provided with multiunit sharp profile of tooth sword, and sharp profile of tooth sword outside upper end is provided with the cutting edge head. This location screw tap, the front end of location end adopts the toper setting, makes things convenient for the operator to put into the bottom hole, and the cylinder system flute profile is used for the chip removal and plays the positioning action with the bottom hole of packing into, has guaranteed the axiality of screw tap and bottom hole, and the cylinder decides the axiality with the fit clearance of bottom hole, and the clearance is less, and the axiality is just higher, otherwise, the clearance is big more, and the axiality just is lower more, because of the axiality is good, stress distribution is even during the tapping, makes the screw tap be difficult for collapsing the rupture, extension cutter life.

Description

Positioning screw tap

Technical Field

The utility model relates to a screw hole machining tool field specifically is a location screw tap.

Background

The commonly used screw tap has the defects that the cutting is difficult to control during processing, the centering is difficult to control, the coaxiality deviation is too large, the stress is too concentrated, the screw tap is easy to break and break, and the screw tap is difficult to take out after being broken.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem lie in overcoming the problem that the background art provided, provide a location screw tap.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a location screw tap, includes stalk portion, calibration part, cutting part and location end, the stalk portion front end is connected with the calibration part of diameter increase, and the calibration part front end is provided with the cutting part of round platform shape, and the cutting part front end is provided with the location end, and the location end can be inserted in the inside through-hole of machined part, and the cutting part carries out cutting work to the through-hole, the cutting part outside evenly is provided with multiunit sharp tooth form sword, and sharp tooth form sword outside upper end is provided with the cutting edge head to arc chip groove has been seted up between two sets of adjacent sharp tooth form sword.

Preferably, the thread provided on the calibration portion is provided with 4-5 turns, and the number of the sharp tooth-shaped edges provided on the calibration portion and the cutting portion is one of 2, 3 and 4.

Preferably, the length of the bottom of the chip groove communicated with the calibration part, the cutting part and the positioning end from the circle center is attached to the radius of the handle part, and the length of the thread valley between two adjacent groups of threads on the positioning end from the circle center is greater than the radius of the handle part.

Preferably, the section of the cutting edge head arranged at the upper end of the sharp-tooth-shaped edge arranged at the outer side of the cutting part in the vertical direction is of a conical structure, and the section of the cutting edge head in the horizontal direction is of an arc structure with the distance from the left side to the center of a circle being greater than the distance from the right side to the center of a circle.

Preferably, the front end of the positioning end is in a conical shape, and the vertical section of the thread arranged on the positioning end is in a trapezoidal structure.

Preferably, the thread arranged outside the positioning end and the threads arranged outside the calibration part and the cutting part form an integral thread, the diameters of the sharp-tooth-shaped edges of the threads arranged on the calibration part are the same, and the threads of the sharp-tooth-shaped edges arranged outside the cutting part are gradually increased from front to back.

Compared with the prior art, the beneficial effects of the utility model are that: the front end of the positioning screw tap is arranged in a conical manner, so that an operator can conveniently put in the bottom hole, the cylindrical screw tap is provided with a groove shape for chip removal and plays a role in positioning the bottom hole, the coaxiality of the screw tap and the bottom hole is ensured, the defect that the existing screw tap is difficult to align by using a wire is overcome, the alignment property is not required to be corrected by the operator according to the experience of the operator, the working efficiency is improved, the tapping accuracy is ensured, the yield is high, the loss is low, and the through hole thread processing, if the screw tap is broken due to improper operation, the positioning end can be reversely withdrawn, the screw tap group is used for processing the blind hole threads to sequentially complete the processing of a screw hole, the matching clearance between the cylinder and the bottom hole determines the coaxiality, the smaller the clearance is, the higher the coaxiality is, and on the contrary, the larger the clearance is, the lower the coaxiality is, meanwhile, due to good coaxiality and uniform stress distribution during tapping, the screw tap is not easy to break and break, and the service life of the cutter is prolonged.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of the vertical section of the structure of the present invention;

FIG. 3 is a schematic sectional view of the structure A-A of the present invention;

FIG. 4 is a schematic diagram of the structure of the present invention showing the cutting of a cuspid cutting cone;

FIG. 5 is a schematic view of the positioning end and the bottom hole of the present invention;

fig. 6 is a schematic sectional view of the structure B-B of the present invention.

In the figure: 1. a handle; 2. a calibration section; 3. a cutting portion; 4. a positioning end; 5. a chip groove; 6. a sharp tooth-shaped blade; 7. a cutting blade head; 8. and (5) processing the workpiece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a positioning screw tap comprises a handle part 1, a calibrating part 2, a cutting part 3 and a positioning end 5, wherein the front end of the handle part 1 is connected with the calibrating part 2 with the diameter increased, the front end of the calibrating part 2 is provided with a cutting part 3 in a truncated cone shape, the front end of the cutting part 3 is provided with the positioning end 4, the positioning end 4 can be inserted into a through hole in a workpiece 8, the cutting part 3 performs cutting work on the through hole, the outer side of the cutting part 3 is uniformly provided with a plurality of groups of sharp-tooth-shaped blades 6, the upper ends of the outer sides of the sharp-tooth-shaped blades 6 are provided with cutting blade heads 7, an arc-shaped chip removal groove 5 is formed between two adjacent groups of sharp-tooth-shaped blades 6, the sharp-tooth-shaped blades 6 are designed in a conical shape by the cutting blade heads 7 with the chip removal grooves 5; on the contrary, the dimension is large, and the cutting amount is large; therefore, different cutting quantity screw taps can be selected for processing according to processing materials, three types of two-edge, three-edge or four-edge can be divided according to the number of the sharp-tooth-shaped edges 6, the sharp-tooth-shaped edges 6 are manufactured according to cutting dimensions, the inclination angle design of the front end of the cutting edge head 7 can effectively reduce the friction resistance during cutting, 4-5 circles of threads are arranged on the calibration part 2, the number of the sharp-tooth-shaped edges 6 arranged on the calibration part 2 and the cutting part 3 is one of 2, 3 and 4, the resistance generated with threads during tapping can also be effectively reduced, the cutting-in is easy during processing, the threads are formed by cutting through the multi-layer sharp-tooth-shaped edges 6, the surface smoothness is good, the roughness is low, the precision is high, the threads are smooth, the resistance during processing is low, the cutting efficiency is high, and the service life;

the length of the bottom of a chip removal groove 5 which is communicated with the calibration part 2, the cutting part 3 and the positioning end 4 from the center of a circle is attached to the radius of the handle part 1, the length of a thread valley between two adjacent groups of threads on the positioning end 4 from the center of a circle is greater than the radius of the handle part 1, the front end of the positioning end 4 is in a conical shape, the vertical section of the thread on the positioning end 4 is in a trapezoidal structure, an operator can conveniently put in a bottom hole in the middle of a workpiece 8, the chip removal groove 5 is formed in a cylinder and used for removing chips and putting in the bottom hole to play a positioning role, the coaxiality of a screw tap and the bottom hole is ensured, the defect that the currently used thread dimension is difficult to align is overcome, the operator does not need to correct the alignment by self experience, the working;

the vertical section of the cutting edge head 7 arranged at the upper end of the sharp-tooth-shaped edge 6 arranged on the outer side of the cutting part 3 is of a conical structure, the section of the cutting edge head 7 in the horizontal direction is of an arc structure, the distance from the left side to the circle center is greater than the distance from the right side to the circle center, the strength of the cutting edge head 7 is improved, the cutting contact is small, the resistance in machining is reduced, the cutting efficiency is high, the service life of a cutter is prolonged, the threads arranged on the outer side of the positioning end 4 and the threads arranged on the outer sides of the calibrating part 2 and the cutting part 3 form an integrated thread, the thread machining is realized, if the screw tap is broken due to improper operation, the positioning end can also be conveniently reversely withdrawn, the diameters of the sharp-tooth-shaped edges of the threads arranged on the calibrating.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A positioning tap comprising a shank (1), a calibration portion (2), a cutting portion (3) and a positioning end (4), characterized in that: the front end of the handle part (1) is connected with a calibration part (2) with the increased diameter, the front end of the calibration part (2) is provided with a cutting part (3) in a cone shape, the front end of the cutting part (3) is provided with a positioning end (4), the positioning end (4) can be inserted into a through hole in a machined part (8), the cutting part (3) performs cutting work on the through hole, a plurality of groups of sharp-tooth-shaped blades (6) are uniformly arranged on the outer side of the cutting part (3), a cutting blade head (7) is arranged at the upper end of the outer side of each sharp-tooth-shaped blade (6), and a curved chip removal groove (5) is formed between every two adjacent groups of sharp-tooth-shaped.

2. A positioning tap according to claim 1, wherein: the thread arranged on the calibration part (2) is provided with 4-5 circles, and the number of the sharp tooth-shaped edges (6) arranged on the calibration part (2) and the cutting part (3) is one of 2, 3 and 4.

3. A positioning tap according to claim 1, wherein: the length of the bottom of the chip groove (5) communicated with the center of a circle and the radius of the handle part (1) are attached to the calibration part (2), the cutting part (3) and the positioning end (4), and the length of the distance between the thread valley between two adjacent groups of threads on the positioning end (4) and the center of a circle is greater than the radius of the handle part (1).

4. A positioning tap according to claim 1, wherein: the section of the cutting edge head (7) arranged at the upper end of the sharp-tooth-shaped edge (6) arranged at the outer side of the cutting part (3) in the vertical direction is of a conical structure, and the section of the cutting edge head (7) in the horizontal direction is of an arc structure with the distance from the center of a circle on the left side being larger than the distance from the center of a circle on the right side.

5. A positioning tap according to claim 1, wherein: the front end of the positioning end (4) is in a conical shape, and the vertical section of the thread arranged on the positioning end (4) is in a trapezoidal structure.

6. A positioning tap according to claim 1, wherein: the thread arranged on the outer side of the positioning end (4) and the threads arranged on the outer sides of the calibration part (2) and the cutting part (3) form an integral thread, the diameters of sharp-tooth-shaped blades of the thread arranged on the calibration part (2) are the same, and the threads of the sharp-tooth-shaped blades arranged on the outer side of the cutting part (3) are gradually increased from front to back.