CN211248664U - Tapping device special for threaded hole - Google Patents

Abstract

The utility model relates to a tapping device special for a threaded hole, which comprises a screw tap, a movable core shaft and a special cutter bar, wherein the screw tap is fixed with the movable core shaft through a set screw, one end of the special cutter bar is provided with an inner hole which can be embedded by the movable core shaft and can move in a reciprocating way, the outer wall of the special cutter bar is provided with a pair of spiral grooves communicated with the inner hole, and after the movable core shaft section is embedded into the inner hole, the spiral grooves are respectively fixed with the movable core shaft section through threads after passing through two spiral grooves through a pair of guide screws; a Morse taper shank fixed with the special cutter bar. The utility model has the advantages that: the utility model provides a special tapping device adopts the clamping that four holding screws's cooperation realized the screw tap, appears the pivoted phenomenon when avoiding the tapping of screw tap, and adopts the design of helicla flute on the special cutter arbor for during the tapping, under the main shaft rotates the drive, the automatic reciprocating motion that carries on of helicla flute can be followed to activity pistil axle, need not the main shaft and removed, has made things convenient for processing.

Description

Tapping device special for threaded hole

Technical Field

The utility model relates to a screw hole processing equipment, in particular to special chasing bar of screw hole.

Background

In mechanical machining, the most common machining mode of internal thread machining is completed through a screw tap, and in the automatic internal thread tapping operation of a machining center, a special screw tap clamping handle and a special screw tap need to be purchased, so that the screw tap can be clamped, and the automatic tapping is completed. The mode needs to purchase different types of screw tap clamping tool shanks to meet the machining requirements aiming at different machining center spindle hole structures, and therefore the mode occupies space, is large in cost and high in cost

Therefore, in response to the above phenomenon, a common simple clamping device for a screw driver is proposed in patent CN 208895338U. It includes: clamping a transition sleeve and a jackscrew by a screw tap; the screw tap clamping transition sleeve is a cylindrical part, an inner hole for clamping a screw tap is formed in one end part, namely the center part of a screw tap clamping end, along the axial direction, a square through groove for positioning is formed in the top of the other end of the screw tap clamping transition sleeve, and two opposite side faces of the square through groove are provided with two opposite jackscrew through holes in a penetrating mode; the inner hole is axially communicated with the square through groove; the screw tap clamping end is provided with a plurality of open slots along the axial direction; and the jackscrew matched with the jackscrew through hole is a jackscrew with threads. The screw tap is simple in clamping, eight open slot structures are formed in the clamping end of the transition sleeve, and the elasticity of the screw tap is utilized to firmly clamp the common screw tap. The simple tap clamping transition sleeve is characterized in that the square positioning grooves in the top of the transition sleeve are simply clamped by the tap, the square outer circle on the top of the tap is matched with the square positioning grooves, the tap is fixed by the jackscrew, the positioning of the common tap is completed, and the unification of the positions of the tap is ensured.

Although the simple screw tap clamping device solves the problem of screw tap clamping, certain defects still exist when the simple screw tap clamping device is used: in the above-mentioned structure, it has only realized the problem of the clamping difficulty of screw tap, and when the tapping, still need the screw tap to remove along the axis direction of screw hole, just can realize the tapping operation of screw hole, and the clamping device of above-mentioned structure is after the handle of a knife of packing into, install the handle of a knife back on the main shaft of lathe again, when carrying out the tapping, the main shaft only provides the rotation action, therefore, still need install the structure or the device of back-and-forth movement additional on the lathe, it carries out the back-and-forth movement to drive the main shaft, just can realize the tapping to the screw hole, unusual trouble.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a conveniently carry out special chasing bar of screw hole of tapping.

In order to solve the technical problem, the utility model adopts the technical scheme that: the utility model provides a special chasing bar of screw hole, its innovation point lies in: comprises that

The screw tap comprises a working section and a handle section, and the end part of the handle section of the screw tap is rectangular;

the movable core shaft comprises a screw tap fixing section and a core shaft movable section, a mounting hole for embedding a handle section of the screw tap is formed in the screw tap fixing section, four positioning holes which are distributed in a rectangular shape and communicated with the mounting hole are formed in the outer wall of the screw tap fixing section, the positioning holes are perpendicular to the mounting hole, the handle section is embedded into the mounting hole and then tightly fixed with the movable core shaft through the four positioning holes by respectively penetrating through the rectangular end parts of the handle section through the four fastening screws, and the four fastening screws tightly press four planes of the rectangular end parts of the handle section respectively;

the special cutter bar is provided with an inner hole in which the movable section of the core shaft is embedded and can move in a reciprocating manner at one end, the outer wall of the special cutter bar is provided with a pair of spiral grooves communicated with the inner hole, the spiral directions of the two spiral grooves are the same and are consistent with the spiral direction of the threaded hole, and after the movable section of the core shaft is embedded into the inner hole, the movable section of the core shaft is respectively fixed with the movable section of the core shaft through threads after penetrating through the two spiral grooves through a pair of guide screws, so that the movable matching of the movable section of the core shaft;

and the Morse taper shank is fixed with one end of the special cutter bar, which is not provided with the inner hole.

Furthermore, a guide sleeve is further sleeved on the outer wall of the guide screw, and the outer wall of the guide sleeve is attached to the inner wall of the spiral groove.

The utility model has the advantages that: the utility model provides a special tapping device adopts the clamping that four holding screws's cooperation realized the screw tap, appears the pivoted phenomenon when avoiding the tapping of screw tap, and adopts the design of helicla flute on the special cutter arbor for during the tapping, under the main shaft rotates the drive, the automatic reciprocating motion that carries on of helicla flute can be followed to activity pistil axle, need not the main shaft and removed, has made things convenient for processing.

The arrangement of the guide sleeve outside the guide screw aims to guide the movement of the guide screw in the spiral groove, and meanwhile, the direct contact between the guide screw and the spiral groove is avoided, so that the thread structure on the outer wall of the guide screw damages the inner wall of the spiral groove when moving, the stroke track of the movable core shaft is influenced, and the tapping precision is further influenced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the schematic view of the tapping device special for threaded holes of the present invention.

Fig. 2 is a schematic view of the special cutter bar of the present invention.

Fig. 3 is a schematic view of the movable core shaft of the present invention.

Fig. 4 is a schematic view of the middle taper shank of the present invention.

Fig. 5 is a schematic view of the middle guide sleeve of the present invention.

Detailed Description

The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.

The tapping device special for the threaded hole shown in figures 1-5 comprises

The screw tap comprises a working section 11 and a handle section 1, wherein the working section 11 of the screw tap is provided with a corresponding cutting cone, and the end part of the handle section 1 of the screw tap is rectangular.

A movable core shaft, the movable core shaft comprises a screw tap fixing section 3 and a core shaft movable section 9, the size of the screw tap fixing section 3 is larger than that of the core shaft movable section 9, so that the whole movable core shaft is in a T shape, and the relative position between the movable core shaft and the special cutter bar 4 can be limited by adopting the design, a mounting hole 13 for embedding the handle section 1 of the screw tap is arranged in the screw tap fixing section 3, four positioning holes 12 which are distributed in a rectangular shape and communicated with the mounting hole 13 are also arranged on the outer wall of the screw tap fixing section 3, and the positioning hole 12 is vertical to the mounting hole 13, the handle section 1 of the screw tap is embedded into the mounting hole 13 of the screw tap fixing section 3, then the four fastening screws 2 respectively penetrate through the four positioning holes 12 to tightly press the rectangular end part of the handle section 1 of the screw tap to realize the fixation between the screw tap and the movable core shaft, and the four fastening screws 2 respectively tightly press the four planes of the rectangular end part of the handle section 1.

A special cutter arbor 4, the one end of special cutter arbor 4 has one and holds the hole 14 of the embedding of pistil axle movable section 9 and reciprocating motion, a pair of helicla flute 6 that is linked together with hole 14 has on the outer wall of special cutter arbor 4, helicla flute 6 relative distribution is in the both sides of the outer wall of special cutter arbor 4, the direction of rotation of two helicla flutes 6 is the same, and all unanimous with the direction of rotation of screw hole 6, after pistil axle movable section 9 imbeds hole 14, pass two helicla flutes 6 respectively through a pair of guide screw 7 after with dabber movable section 9 thread tightening, realize the clearance fit of dabber movable section 9 and special cutter arbor 4, still have one and guide screw 7 matched with screw blind hole 15 in dabber movable section 9's both sides simultaneously.

The outer wall of the guide screw 7 is further sleeved with a guide sleeve 8, the outer wall of the guide sleeve 8 is attached to the inner wall of the spiral groove 3, and the inner wall of the guide sleeve 8 is attached to the inner wall of the guide screw 7. To the setting of the uide bushing outside the guide screw 7, on the one hand, guide in order to lead to the activity of guide screw 7 in helicla flute 3, ensure that the activity pistil axle rotates along the orbit of helicla flute 3, guarantee the tapping precision, on the other hand, guide screw 7 and helicla flute 3 direct contact have also been avoided, the helicla configuration that leads to guide screw 7 outer wall causes the damage to the inner wall of helicla flute 3 when reciprocating motion, make the orbit of helicla flute 3 change, and make the rotatory orbit of activity pistil axle also corresponding certain deviation that takes place, and then influence the precision of tapping.

A Morse taper shank 5, the Morse taper shank 5 is fixed with one end of the special cutter bar 4 which is not provided with the inner hole 14.

The working principle is as follows: when carrying out the tapping, with the screw tap, the movable core axle, special cutter arbor 4, morse taper shank 5 connects gradually after fixed, pack into ordinary boring machine main shaft taper hole with morse taper shank 5, and the screw tap then stretches into the downthehole of treating the tapping of work piece, then, the main shaft rotates the back, the movable core axle is automatic under the guide effect of guide screw 7 to move forward and lead to the rotation along the extending direction of helicla flute 3, thereby realize the tapping to the hole of work piece, in order to form the screw hole, after the tapping, the main shaft is reversed again, the movable core axle can withdraw from backward along the extending direction of helicla flute 3, whole process need not the main shaft and removes, unusual convenience.

The utility model provides a special tapping device adopts the clamping that four holding screws's cooperation realized the screw tap, appears the pivoted phenomenon when avoiding the tapping of screw tap, and adopts the design of helicla flute on the special cutter arbor for during the tapping, under the main shaft rotates the drive, the automatic reciprocating motion that carries on of helicla flute can be followed to activity pistil axle, need not the main shaft and removed, has made things convenient for processing.

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 (2)

1. The utility model provides a special chasing bar of screw hole which characterized in that: comprises that

The screw tap comprises a working section and a handle section, and the end part of the handle section of the screw tap is rectangular;

the movable core shaft comprises a screw tap fixing section and a core shaft movable section, a mounting hole for embedding a handle section of the screw tap is formed in the screw tap fixing section, four positioning holes which are distributed in a rectangular shape and communicated with the mounting hole are formed in the outer wall of the screw tap fixing section, the positioning holes are perpendicular to the mounting hole, the handle section is embedded into the mounting hole and then tightly fixed with the movable core shaft through the four positioning holes by respectively penetrating through the rectangular end parts of the handle section through the four fastening screws, and the four fastening screws tightly press four planes of the rectangular end parts of the handle section respectively;

the special cutter bar is provided with an inner hole in which the movable section of the core shaft is embedded and can move in a reciprocating manner at one end, the outer wall of the special cutter bar is provided with a pair of spiral grooves communicated with the inner hole, the spiral directions of the two spiral grooves are the same and are consistent with the spiral direction of the threaded hole, and after the movable section of the core shaft is embedded into the inner hole, the movable section of the core shaft is respectively fixed with the movable section of the core shaft through threads after penetrating through the two spiral grooves through a pair of guide screws, so that the movable matching of the movable section of the core shaft;

and the Morse taper shank is fixed with one end of the special cutter bar, which is not provided with the inner hole.

2. The tapping device dedicated for threaded holes of claim 1, wherein: the outer wall of the guide screw is further sleeved with a guide sleeve, and the outer wall of the guide sleeve is attached to the inner wall of the spiral groove.

Images