阅读说明：本技术 一种组合型定心丝锥 (Combined centering screw tap ) 是由 不公告发明人 于 2020-06-04 设计创作，主要内容包括：本发明一种组合型定心丝锥公开了一种通过定心杆进行定心对准,避免攻丝歪斜,且拆装方便,易于操作的定心丝锥,其特征在于夹持部和丝锥柄的一端相连接,丝锥体的一端和丝锥柄的另一端相连接,定心装置由定心杆、通孔、凹槽、耐磨套、锁紧螺钉、连接筋、固定板、限位板和六角槽组成,所述丝锥体的另一端上开有凹槽,固定板置于丝锥体的另一端上,所述固定板上设置有限位板,所述限位板和固定板之间通过多个等角度分布的连接筋相连接,所述限位板置于凹槽内,所述限位板中部开有通孔,所述凹槽内开有螺孔,紧顶螺钉的一端螺接置于螺孔内,所述紧顶螺钉的另一端伸出螺孔置于限位板内,所述紧顶螺钉的另一端置有限位块,所述限位块和限位板相贴合。(The invention discloses a combined centering screw tap, which is centered and aligned through a centering rod, avoids tapping deflection, is convenient to assemble and disassemble and is easy to operate, and is characterized in that a clamping part is connected with one end of a screw tap handle, one end of a screw tap body is connected with the other end of the screw tap handle, a centering device consists of the centering rod, a through hole, a groove, a wear-resistant sleeve, a locking screw, a connecting rib, a fixing plate, a limiting plate and a hexagonal groove, the groove is formed in the other end of the screw tap body, the fixing plate is arranged at the other end of the screw tap body, the limiting plate is arranged on the fixing plate, the limiting plate and the fixing plate are connected through a plurality of connecting ribs which are distributed at equal angles, the limiting plate is arranged in the groove, the through hole is formed in the middle of the limiting plate, a screw hole is formed in the groove, one end of a top-tightening screw is screwed in the screw hole, the other end of the set screw is provided with a limiting block, and the limiting block is attached to the limiting plate.)

1. A combined centering screw tap is characterized in that: the centering device comprises a main body device and a centering device, wherein the main body device comprises a clamping part, a screw cone handle and a screw cone body, the clamping part is connected with one end of the screw cone handle, one end of the screw cone body is connected with the other end of the screw cone handle, the centering device comprises a centering rod, a through hole, a groove, a wear-resistant sleeve, a locking screw, a connecting rib, a fixing plate, a limiting plate and a hexagonal groove, the groove is formed in the other end of the screw cone body, the fixing plate is arranged at the other end of the screw cone body, the limiting plate is arranged on the fixing plate, the limiting plate and the fixing plate are connected through a plurality of connecting ribs which are distributed at equal angles, the limiting plate is arranged in the groove, the through hole is formed in the middle of the limiting plate, a screw hole is formed in the groove, one end of a top tightening screw is in screwed in the screw hole, the, the limiting blocks are attached to the limiting plates, one ends of the centering rods are arranged on the fixing plate at equal angles, the other ends of the centering rods extend horizontally, are bent downwards in an inclined mode, are bent downwards in a vertical mode, and are bent towards the direction of the central line of the through hole in an inclined mode, and the wear-resistant sleeve is sleeved on the vertical portion of the centering rods.

2. The combined centering tap according to claim 1, wherein the centering rod is separated from the vertical portion to form a telescopic rod, the telescopic rod is telescopically arranged in the centering rod, a spring is arranged between the telescopic rod and the centering rod, and when the centering rod is inserted into a drill hole and the centering rod collides with the opening of the drill hole, the spring can contract and buffer to avoid damage to the centering rod for subsequent alignment.

3. The combination centering tap according to claim 1, wherein said set screw is formed with a hexagonal groove at the other end thereof.

4. The combined centering tap according to claim 1 or 2, wherein a plurality of centering rods are inserted into the bore hole, and the centering rods support and guide the bore hole to align the tap as a whole, thereby preventing the tap from being skewed when entering or exiting the tapping.

5. The combination centering tap according to claim 4, wherein said centering rod is rounded at the other end.

6. The combination centering tap according to claim 5, wherein said centering rod is provided with balls for reducing friction between said centering rod and an inner wall of said bore hole, thereby facilitating movement of said centering rod within said bore hole.

7. The combined centering tap according to claim 6, wherein said centering rod is formed with a through hole and filled with grease.

8. The combination centering tap according to claim 1, wherein said set screw and threaded hole are cooperatively designed to allow retrofit of existing taps.

9. The combination centering tap according to claim 1, wherein a threaded hole is bored at the other end of said tap body, and the centering means is mounted on the tap by a set screw and the threaded hole being engaged.

Technical Field

The invention discloses a combined centering screw tap, relates to a centering screw tap capable of guiding during screw tap tapping, and belongs to the field of machining. In particular to a centering screw tap which can perform centering alignment through a centering rod, avoid the deviation of tapping, is convenient to disassemble and assemble and is easy to operate.

Background

At present when carrying out manual tapping, need aim at the drilling with the screw tap, then press down through the tapping spanner and revolve wrong tapping work in attacking the screw tap into the drilling, but because personnel's visual angle problem and hand operation error when initially aiming at the drilling with the screw tap, the screw tap axis is extremely easy to deviate from drilling axial lead when beginning to attack the drilling, thereby lead to the whole screw tap to attack crooked, influence subsequent tapping, current screw tap lacks the structure of supplementary centering, easily produce the screw tap crooked when leading to manual tapping, the inconvenience of initial alignment.

The publication number CN208713057U discloses a multifunctional screw tap integrating tapping and broken screw tap disassembly, which structurally comprises a screw and a handle vertically arranged with the screw, wherein the handle is transversely sleeved on the screw, one end of the screw is provided with a tapping device, and the other end of the screw is provided with a broken screw tap disassembly device; the screw tap dismounting device comprises a dismounting connecting shaft, one end of the dismounting connecting shaft is mounted at one end of a screw rod through an elastic chuck, a dismounting claw is arranged at the other end of the dismounting connecting shaft, the screw tap is inconvenient to align with a drill hole when manual tapping is used, and the screw tap is easy to generate eccentricity and skew when the drill hole is initially tapped.

The publication number CN205129101U discloses a high-guidance-performance screw tap, which comprises a screw tap handle and a screw tap body, wherein a screw tap neck is arranged between the screw tap body and the screw tap handle, and the diameter of the screw tap neck is smaller than the small diameter of the screw tap body; the front end of the cone body is provided with a guide post, the diameter of the guide post is smaller than the small diameter of the cone body, and a conical transition section is arranged at the joint of the guide post and the cone body; the front end of the guide post is provided with a front cone; the outer end of the screw tap handle is provided with a clamping part, and the end part of the outer end of the screw tap handle is also provided with a rear cone; 3-5 chip flutes are uniformly arranged on the periphery of the tap body, and the tap is prone to deflection when initially aligned with a drilled hole, so that deviation of subsequent tapping is caused.

Disclosure of Invention

In order to improve the situation, the combined centering screw tap provided by the invention has the advantages that centering alignment is carried out through the centering rod, the tapping deflection is avoided, the assembly and disassembly are convenient, and the operation is easy.

The invention discloses a combined centering tap, which is realized by the following steps: the invention relates to a combined centering screw tap, which consists of a main body device and a centering device, wherein the main body device consists of a clamping part, a screw tap handle and a screw cone body, the clamping part is connected with one end of the screw tap handle, one end of the screw cone body is connected with the other end of the screw tap handle, the centering device consists of a centering rod, a through hole, a groove, a wear-resisting sleeve, a locking screw, a connecting rib, a fixing plate, a limiting plate and a hexagonal groove, the groove is formed in the other end of the screw cone body, the fixing plate is arranged at the other end of the screw cone body, the limiting plate is arranged on the fixing plate, the limiting plate and the fixing plate are connected through a plurality of connecting ribs which are distributed at equal angles, the limiting plate is arranged in the groove, the through hole is formed in the middle part of the limiting plate, a screw hole is formed in the groove, one end of a, the other end of the set screw is provided with a limiting block, the limiting block is attached to the limiting plate, one ends of a plurality of centering rods are arranged on the fixing plate at equal angles, the other end of each centering rod extends horizontally, is bent downwards in an inclined mode, is bent downwards in a vertical mode, and is bent towards the central line direction of the through hole in an inclined mode;

furthermore, the centering rod separates one end from the vertical part to form a telescopic rod, the telescopic rod is arranged in the centering rod in a telescopic mode, and a spring is arranged between the telescopic rod and the centering rod.

Has the beneficial effects.

The tap and the drill hole are centered and aligned before tapping is facilitated, and the tap is prone to skewing when the tap is in and out of the drill hole.

And secondly, the mounting and dismounting are simple and convenient, and the machine is convenient to dismount and use.

Drawings

Fig. 1 is a perspective view showing a combined centering tap according to the present invention.

Fig. 2 is a perspective exploded view of a combination centering tap of the present invention.

FIG. 3 is a schematic view showing the structure of a combined centering tap of the present invention.

FIG. 4 is a schematic structural view of embodiment 2 of a combined centering tap of the present invention.

In the attached drawings

Wherein the method comprises the following steps: clamping part (1), screw tap handle (2), screw tap body (3), centering rod (4), through-hole (5), recess (6), wear-resisting cover (7), locking screw (8), splice bar (9), fixed plate (10), limiting plate (11), hexagonal groove (12), telescopic link (13), spring (14).

The specific implementation mode is as follows: