CN214602356U

CN214602356U - Blind hole tapping screw tap

Info

Publication number: CN214602356U
Application number: CN202120366434.9U
Authority: CN
Inventors: 刘浩
Original assignee: Ming Hao Auto Metal Parts Guangzhou Co ltd
Current assignee: Ming Hao Auto Metal Parts Guangzhou Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-05
Anticipated expiration: 2031-02-08

Abstract

The utility model discloses a tooth screw tap is attacked to blind hole, including the square handle, the left side bolt joint of square handle has the fixed case, the inner chamber sliding connection of fixed case has the handle, the left side of handle runs through fixed case and integrated into one piece has the neck, the fabrication hole has been seted up to the left center department of neck, the left side integrated into one piece of neck has the cutter body inscribed circle. The utility model discloses a chip groove, the rake face, the cooperation that the surface of back of the knife blade and chip groove and the surface of neck are 15 degrees angles, the radian of rake face and the back of the knife blade is different, the waste material of guaranteeing to cut has good business turn over relation with the exhaust waste material, the rake face after the cooperation improvement simultaneously, just the iron fillings discharge angle and the size the same with the course of working in production, reducible iron fillings stop and pile up in the work piece is inside, simultaneously the rake face changes the back, the iron fillings that produce in the course of working are discharged with the form of tiny being similar to the iron wire, prevent the winding of iron fillings on the screw tap, lead to influencing the screw tap and withdraw from and lead to the screw tap damage.

Description

Blind hole tapping screw tap

Technical Field

The utility model relates to a tooth field is attacked to the machining blind hole, specifically is a tooth screw tap is attacked to blind hole.

Background

The blind hole parts such as shafts, sleeves, pipes and the like which are stressed greatly are often encountered in production, the requirements on the position and the depth of a screw hole are strict due to the limitation of the structure and the stress bearing reason, if general screw taps are used for tapping, thread galling and screw tap fracture are difficult to avoid, the effect of various selected lubricating fluids is not satisfactory enough, the thread quality is seriously influenced, and if a thread milling cutter is used for processing, the quality requirements can be met.

The blind hole is attacked tooth and is needed to use the screw tap, and traditional blind hole is attacked tooth screw tap chip removal and is not smooth and easy, leads to by the poor problem of machined surface roughness simultaneously because long-pending bits lead to size error in the course of working to remaining more iron fillings can influence next cutter normal processing, can make the cutter cutting edge damage, shorten cutter life, increase cutter purchase cost, cause the product to scrap, reduced product machining precision and efficiency, cause product quality unstability and production efficiency low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blind hole tapping screw tap is in order to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a tooth screw tap is attacked to blind hole, includes the square handle, the left side bolt joint of square handle has the fixed case, the inner chamber sliding connection of fixed case has the handle, the left side of handle runs through fixed case and integrated into one piece has the neck, the fabrication hole has been seted up to the left center department of neck, the left side integrated processing of neck has cutter body inscribed circle, all bolt joints all around of cutter body inscribed circle has the cutting edge, the cutting edge is the heliciform.

Preferably, one side integrated into one piece that the cutting edge was in opposite directions has the chip groove, the chip groove is the heliciform, one side integrated into one piece of cutting edge has the rake face, the rake face is circular-arcly, one side integrated into one piece that the rake face was kept away from to the cutting edge has the back of a knife blade, the back of a knife blade is circular-arcly, the surface of chip groove is the angle of angle with the surface of neck.

Preferably, the inner cavity of the handle is embedded with a reinforcing rib, and the surface of the handle is bonded with an anti-slip strip.

Preferably, an oil filling groove is formed in the left side of the top of the handle, and one side, far away from the handle, of the oil filling groove is communicated with the right side of the technical hole.

Preferably, the surface of the neck is sprayed with a wear-resistant layer, and the wear-resistant layer is made of boron nitride hard paint.

Preferably, the right side of handle top and bottom all is seted up flutedly, reset spring has been bolted to the inboard of recess inner chamber, reset spring's outside bolt has been connected the movable plate, and the outside bolt of movable plate has been connected the kelly, the draw-in groove that cooperation kelly used has all been seted up from a left side to the right side in proper order to the top and the bottom of fixed case.

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

1. the utility model ensures that the cut waste material and the discharged waste material have good in-and-out relation through the matching of the surfaces of the chip groove, the front knife face, the knife back and the chip groove and the surface of the neck part at an angle of 15 degrees and the different radians of the front knife face and the knife back, meanwhile, the improved front cutter face is matched, the discharging angle and the discharging size of the front cutter face are exactly the same as those of scrap iron generated in the machining process, the retention and accumulation of the scrap iron in the workpiece can be reduced, meanwhile, after the front tool face is changed, scrap iron generated in the machining process is discharged in a fine iron wire-like form, so that the phenomenon that the scrap iron is wound on the screw tap to influence the withdrawal of the screw tap to damage the screw tap is avoided, meanwhile, the chip removal mode is a thread chip removal method, so that the chip removal effect of the screw tap can be effectively improved, the use process is avoided, especially, when processing the deep hole, take place the piece and block up, solved traditional blind hole and attacked the problem that the tooth screw tap chip removal is not smooth and easy.

2. The utility model discloses a cooperation of antislip strip, frictional force between user's palm and the handle has been increased, the handle drops when preventing that the user from taking the screw tap, cooperation through the strengthening rib, the intensity of handle has been improved, cooperation through the oil filler point, the person of facilitating the use pours into the coolant oil into, be convenient for dispel the heat to the screw tap, the material through wearing layer and wearing layer is boron nitride hard coating's cooperation, the wear resistance of neck has been improved, through the recess, reset spring, the movable plate, the cooperation of kelly and draw-in groove, the person of facilitating the use adjusts the handle, thereby adjust the length of screw tap.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of the cutting edge of the present invention;

fig. 3 is a cross-sectional view of the blind hole tapping screw tap of the present invention;

FIG. 4 is a structural cross-sectional view of the neck of the present invention;

fig. 5 is a perspective view of the handle and the fixing box of the present invention.

In the figure: 1. a square handle; 2. a fixed box; 3. a handle; 4. a neck portion; 5. the cutter body is inscribed with a circle; 6. a cutting edge; 7. a chip groove; 8. a rake face; 9. a back of a knife; 10. reinforcing ribs; 11. an oil injection groove; 12. a fabrication hole; 13. a wear layer; 14. a groove; 15. a return spring; 16. and (5) clamping the rod.

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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides an embodiment: a blind hole tapping screw tap comprises a square handle 1, a fixed box 2 is bolted on the left side of the square handle 1, a handle 3 is connected to the inner cavity of the fixed box 2 in a sliding manner, the left side of the handle 3 penetrates through the fixed box 2 and is integrally formed with a neck 4, a process hole 12 is formed in the center of the left side of the neck 4, a cutter body inscribed circle 5 is integrally processed on the left side of the neck 4, cutting edges 6 are bolted on the periphery of the cutter body inscribed circle 5, the cutting edges 6 are spiral, the radian of the front cutter face 8 and the radian of the cutter back 9 are different through the matching of the surfaces of a chip groove 7, a front cutter face 8, a cutter back 9 and the chip groove 7 and the surface of the neck 4, good inlet and outlet relations between cut waste and discharged waste are guaranteed, the improved front cutter face 8 is matched, the discharging angle and the discharging size of scrap iron are the same as those of scrap iron generated in the processing process, and the staying and accumulation of the scrap iron in a workpiece can be reduced, simultaneously 8 back of changing of rake face, the iron fillings that produce in the course of working are discharged with the form of tiny iron wire of being similar to, prevent iron fillings winding on the screw tap, lead to influencing the screw tap and withdraw from and lead to the screw tap to damage, and the chip removal mode can effectively increase the effect of screw tap chip removal for the screw thread chip removal method simultaneously, avoids in the use, when especially processing the deep hole, takes place the piece and blocks up, has solved traditional blind hole and has attacked the unsmooth problem of screw tap chip removal.

The opposite side of the cutting edge 6 is integrally processed with a chip groove 7, the chip groove 7 is in a spiral shape, one side of the cutting edge 6 is integrally formed with a front cutter face 8, the front cutter face 8 is in an arc shape, one side of the cutting edge 6, which is far away from the front cutter face 8, is integrally formed with a cutter back 9, the cutter back 9 is in an arc shape, the surface of the chip groove 7 and the surface of the neck 4 form a 15-degree angle, the chip groove 7, the front cutter face 8, the cutter back 9 and the chip groove 7 are matched with the surface of the neck 4 to form a 15-degree angle, the radians of the front cutter face 8 and the cutter back 9 are different, good in-out relation between cut scrap and discharged scrap is ensured, the improved front cutter face 8 is matched to be exactly the same as the discharge angle and size of scrap iron generated in the processing process, the stay and accumulation of the scrap iron in the workpiece can be reduced, and the scrap iron wire generated in the processing process is discharged in a fine form after the front cutter face 8 is changed, the winding of iron fillings on the screw tap is prevented, the screw tap is led to influencing and withdraws from and lead to the screw tap to damage, and the chip removal mode is the effect that the screw tap chip removal can effectively be increased to the screw thread chip removal method simultaneously, avoids in the use, when especially processing the deep hole, takes place the piece and blocks up.

The inner chamber of handle 3 inlays and is equipped with strengthening rib 10, and the surface of handle 3 bonds and has the antislip strip, and through the cooperation of antislip strip, the frictional force between user's palm and the handle 3 has been increased, and handle 3 drops when preventing that the user from taking the screw tap, through the cooperation of strengthening rib 10, has improved the intensity of handle 3.

Oil filler point 11 has been seted up on the left side at 3 tops of handle, and one side that handle 3 was kept away from in oil filler point 11 communicates with the right side of fabrication hole 12, and through the cooperation of oil filler point 11, the person of being convenient for pours into the cooling oil into, is convenient for dispel the heat to the screw tap.

The surface spraying of neck 4 has wearing layer 13, and the material of wearing layer 13 is boron nitride hard coating, is boron nitride hard coating's cooperation through the material of wearing layer 13 and wearing layer 13, has improved the wear resistance of neck 4.

The right side of 3 tops of handle and bottom all is seted up flutedly 14, the inboard bolt of the 14 inner chambers of recess has reset spring 15, reset spring 15's outside bolt has the movable plate, and the outside bolt of movable plate has a kelly 16, the draw-in groove that cooperation kelly 16 used has all been seted up from a left side to the right side in proper order in the top and the bottom of fixed case 2, through recess 14, reset spring 15, the movable plate, the cooperation of kelly 16 and draw-in groove, convenient to use person adjusts handle 3, thereby adjust the length of screw tap.

The working principle is as follows: during operation, a user presses the clamping rod 16 inwards, the clamping rod 16 drives the moving plate to move inwards and extrude the return spring 15, then the user pulls the fixed box 2 towards the right side, then the user loosens fingers, the clamping rod 16 is driven to be inserted into the clamping groove through elastic resilience of the return spring 15, so that the length of the screw tap is adjusted, when the screw tap is used, a 15-degree angle is formed between the surface of the chip discharge groove 7 and the surface of the neck 4 and the radians of the front knife face 8 and the knife back 9 are different, good in-out relation between cut waste and discharged waste is guaranteed, meanwhile, the improved front knife face 8 is matched and just as same as the discharge angle and size of iron chips generated in the machining process, retention and accumulation of the iron chips in a workpiece can be reduced, and after the front knife face 8 is changed, the iron chips generated in the machining process are discharged in a fine iron wire-like mode, and winding of the iron chips on the screw tap is prevented, the screw tap is damaged due to the fact that the screw tap is influenced to withdraw, the chip removal mode is a thread chip removal method, the chip removal effect of the screw tap can be effectively improved, and chip blockage is avoided during the use process, particularly when deep holes are machined.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a blind hole tapping screw tap, includes square shank (1), its characterized in that: the left side bolt of square handle (1) has connect fixation case (2), the inner chamber sliding connection of fixation case (2) has handle (3), the left side of handle (3) runs through fixation case (2) and integrated into one piece has neck (4), fabrication hole (12) have been seted up to the left center department of neck (4), the left side integrated into one piece of neck (4) has cutter body inscribed circle (5), all bolted connections all around of cutter body inscribed circle (5) have cutting edge (6), cutting edge (6) are the heliciform.

2. The blind hole tapping tap according to claim 1, wherein: cutting edge (6) one side integrated into one piece in opposite directions has chip groove (7), chip groove (7) are the heliciform, one side integrated into one piece of cutting edge (6) has rake face (8), rake face (8) are circular-arcly, one side integrated into one piece that rake face (8) were kept away from in cutting edge (6) has back of a knife blade (9), back of a knife blade (9) are circular-arcly, the surface of chip groove (7) is 15 degrees angles with the surface of neck (4).

3. The blind hole tapping tap according to claim 1, wherein: the inner cavity of the handle (3) is embedded with a reinforcing rib (10), and the surface of the handle (3) is bonded with an anti-slip strip.

4. The blind hole tapping tap according to claim 1, wherein: an oil filling groove (11) is formed in the left side of the top of the handle (3), and one side, far away from the handle (3), of the oil filling groove (11) is communicated with the right side of the technical hole (12).

5. The blind hole tapping tap according to claim 4, wherein: the surface spraying of neck (4) has wearing layer (13), the material of wearing layer (13) is boron nitride hard coating.

6. The blind hole tapping tap according to claim 4, wherein: handle (3) top and the right side of bottom all seted up recess (14), reset spring (15) have been bolted to the inboard of recess (14) inner chamber, the movable plate has been bolted to the outside of reset spring (15), and the outside of movable plate has been bolted and has been connected kelly (16), the draw-in groove that cooperation kelly (16) used has all been seted up in proper order from a left side to the right side in top and the bottom of fixed case (2).