CN212239478U

CN212239478U - Screw thread direction reworking screw tap

Info

Publication number: CN212239478U
Application number: CN202020442828.3U
Authority: CN
Inventors: 朱安辉
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-12-29
Anticipated expiration: 2030-03-30

Abstract

The utility model relates to a technical field of screw tap of doing over again, concretely relates to screw thread direction screw tap of doing over again, including the main shaft, be located the joint body of main shaft one end and be located the processing body of the main shaft other end, the joint body is installed on lathe rotating member, and the processing body is provided with tapping screw thread including the rotatory cutting body that is located joint body one end and the direction of guidance that is located rotatory cutting body one end on the rotatory cutting body, is provided with the direction screw thread on the direction of guidance, and the direction screw thread is the same with the shape and the direction of rotation homogeneous of tapping screw thread. Through setting up the direction head, set up the direction that has the cutting action of ordinary screw tap front end to the direction head that does not take the cutting action, be provided with the direction screw thread on the direction head, the direction head is equivalent to the screw this moment, and the screw can automatic alignment former screw thread, and after the part that the direction head got into processing, the rotatory cutting body that direction head one end was equipped with tapping screw thread can normally return the tooth, and available tapping machine, the screwdriver, tool such as gas screwdriver return the tooth, has improved the efficiency of returning the tooth processing.

Description

Screw thread direction reworking screw tap

Technical Field

The utility model relates to a technical field of screw tap of doing over again, concretely relates to screw thread direction screw tap of doing over again.

Background

The screw tap is mainly used for drilling blind holes in a numerical control machining center, and is high in machining speed, high in precision, good in chip removal and good in centering property. The spiral cutting machine is suitable for processing through holes and blind holes, different spiral angles can correspond to different materials, and the arrangement and cutting are good.

In the chinese utility model patent with the publication number CN207681661U, a solid carbide spiral tap is disclosed, which comprises a main shaft, a rotator, a tapping thread, a head cone, a scale, a marking ring, a chip guide groove, a liquid inlet, a cooling groove, a pre-tapping thread and a clamping plane. The utility model discloses the pre-tapping can carry out preliminary processing to the material, and the line of certain degree of depth can be attacked to the pre-tapping, is provided with the chip groove that the spiral distributes on the rotator, and the chip groove can be derived the piece of processing, improves the machining precision of cutter.

When the tap returns the teeth, the tap head cone has the guide of cutting action, so that the tap can only be reworked by a manual reamer, and the manual reamer is slowly rotated to align the original threads and perform manual tooth returning. However, such manual tooth returning operation reduces the tooth returning efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screw thread direction screw tap of doing over again to solve among the prior art screw tap and need hand to return the tooth and lead to returning the beneath technical problem of tooth machining efficiency when adding man-hour.

In order to realize the above-mentioned purpose, the utility model discloses a technical scheme provide a screw thread direction screw tap of doing over again, include the main shaft, be located the joint body of main shaft one end and being located the processing body of the main shaft other end, the joint body mountable is on the lathe rotating part, the processing body is including being located the rotatory cutting body of joint body one end is with being located the direction head of rotatory cutting body one end, be provided with the tapping screw thread on the rotatory cutting body, be provided with the direction screw thread on the direction head, the direction screw thread with the shape and the direction of rotation homogeneous phase of tapping screw thread are the same.

Further, the rotary cutting body and the guide head are integrally formed.

Further, the pilot thread is smaller than the tapping thread by an accuracy level.

Further, the main shaft, the clamping body and the processing body are all arranged on the same central axis.

Furthermore, the processing body is provided with a spiral groove, and the spiral groove is formed around the processing body.

Further, the number of the spiral grooves is at least two.

Further, the pitch of each two spiral grooves is the same everywhere.

Furthermore, the clamping body is provided with at least one group of clamping planes which are convenient for clamping the rotating parts of the machine tool.

Furthermore, the rotary cutting body and the guide head are made of hard alloy materials.

The beneficial effects of the utility model reside in that:

1. through setting up the direction head, set up the direction that has the cutting action of ordinary screw tap front end into the direction head that does not take the cutting action, be provided with the direction screw thread on the direction head, the direction head is equivalent to the screw this moment, and the screw can automatic alignment former screw thread, and after the part that the direction head got into processing, the rotatory cutting body that direction head one end was equipped with tapping screw thread can normally return the tooth, need not again at this moment and returns the tooth by hand, and available tapping machine, the screwdriver, tools such as gas screwdriver return the tooth, have improved the efficiency of returning the tooth processing.

2. The rotary cutting body and the guide head are integrally formed, so that the connection strength of the rotary cutting body and the guide head is increased, and the guide head is prevented from falling off in the using process.

3. The guide thread is smaller than the tapping thread by one precision grade, so that the automatic alignment and precession of the guide thread are facilitated, and the guide thread at the front end is convenient to guide into an original threaded hole more easily.

4. Because the screw tap rotates and can realize the processing to the part, main shaft, joint body and processing body all set up on same central axis, have guaranteed the axiality of screw tap, reduce the part machining error, have guaranteed the yield of part.

5. Through setting up the helicla flute, coolant liquid can enter into the work piece along the helicla flute in, cools off the processing position and the processing body of work piece, has both helped the processing of part, has prolonged the life of screw tap simultaneously again. Meanwhile, the machined cuttings can be discharged from the spiral groove in time by arranging the spiral groove.

6. Because when the part is machined, the introduction of the cooling liquid and the discharge of the cutting chips are carried out simultaneously, and at least two spiral grooves are arranged, the simultaneous normal operation of the two procedures of the introduction of the cooling liquid and the discharge of the cutting chips can be better ensured, and the normal machining of the part is ensured.

7. The distance between every two spiral grooves is the same, so that when the machining body is used for machining parts, stress on each part is uniform, and partial damage caused by uneven local stress of the machining body is avoided, and the screw tap is scrapped.

8. Through setting up the centre gripping plane, the lathe rotatable parts's of being convenient for centre gripping, and be difficult for rocking after the centre gripping, ensured the steadiness after the screw tap installation.

9. The hard alloy has high hardness, strength, wear resistance and corrosion resistance, is known as industrial teeth, is used for manufacturing cutting tools, cutters, cobalt tools and wear-resistant parts, and is widely applied to the fields of military industry, aerospace, machining, metallurgy, oil drilling, mining tools, electronic communication, building and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded schematic view of a thread guide rework tap according to an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Description of reference numerals:

1. a main shaft; 11. a transition slope; 2. a clip body; 21. clamping a plane; 3. processing the body; 31. a rotating cutting body; 311. tapping threads; 32. a guide head; 321. a guide thread; 33. a helical groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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 "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, 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.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, as the utility model discloses a screw thread direction rework screw tap that embodiment provided, including main shaft 1, be located the joint body 2 of main shaft 1 one end and be located the processing body 3 of the 1 other end of main shaft, the joint body 2 mountable is on the lathe rotating member, processing body 3 is including the rotatory cutting body 31 that is located joint body 2 one end and the direction head 32 that is located rotatory cutting body 31 one end, be provided with tapping screw 311 on the rotatory cutting body 31, be provided with direction screw 321 on the direction head 32, in this embodiment, direction head 32 front end is provided with two to three and detains the tooth, form direction screw 321. The guide thread 321 is the same shape and rotational direction as the tapping thread 311.

Through setting up the direction head 32, the direction that has the cutting action of ordinary screw tap front end sets up to the direction head 32 that does not have the cutting action, is provided with guide thread 321 on the direction head 32 and one end sets up to the plane, and the direction head 32 is equivalent to the screw this moment, and the screw can automatic alignment original screw thread, and after direction head 32 got into the part of processing, rotatory cutting body 31 that direction head 32 one end was equipped with tapping screw 311 can normally return the tooth, need not again at this moment to return the tooth by hand, and available tapping machine, the electricity is criticized, and tools such as gas is criticized return the tooth, has improved the efficiency of returning the tooth processing.

Specifically, the guide thread 321 is smaller than the tapping thread 311 by one precision level, which is more favorable for automatic alignment and screwing of the guide thread 321, and facilitates the guide thread 321 at the front end to be more easily led into the original threaded hole. For example, the following table:

accuracy requirement of reworked threaded hole	Accuracy of tapping threads	Precision of guide thread
			6G	P3 or P4	6f
6H	P1 or P2	6g

The tapping threads 311 with the precision of P1 and P2 are machined to the precision of 6H, P3 and P4, the precision of the machined threaded holes is 6G, 6f is lower than 6G by one grade, and 6G is lower than 6H by one grade.

The rotary cutting body 31 and the guide head 32 are integrally formed, and the integrally formed arrangement increases the connection strength of the rotary cutting body and the guide head, so that the guide head 32 is prevented from falling off in the using process. The rotary cutting body 31 and the guide head 32 are made of hard alloy materials, the hard alloy has high hardness, strength, wear resistance and corrosion resistance, is known as industrial teeth, is used for manufacturing cutting tools, cutters, cobalt tools and wear-resistant parts, is widely applied to the fields of military industry, aerospace, machining, metallurgy, oil drilling, mine tools, electronic communication, building and the like, and the market demand of the hard alloy is continuously increased along with the development of downstream industries. And the future high and new technology weapons and equipment manufacturing, the progress of advanced science and technology and the rapid development of nuclear energy will greatly improve the demand for cemented carbide products with high technical content and high quality stability.

The rotary cutting body 31 and the guide head 32 can also be fixedly connected in a welding mode, and the welded joint needs to be polished after welding, so that the welded joint is smooth and convenient for subsequent processing.

Referring to fig. 1, further, the main shaft 1 is cylindrical, the processing body 3 is also cylindrical, the radius of one end of the main shaft 1 is larger than the radius of one end of the processing body 3, the connecting portion of the main shaft 1 and the processing body 3 is provided with the excessive inclined surface 11, by arranging the excessive inclined surface 11, on one hand, the overall processing of the main shaft 1 and the processing body 3 is facilitated, on the other hand, the structural strength of the connecting portion of the main shaft 1 and the processing body 3 is better, the stability of the overall structure of the tap during processing is ensured, and the processing precision is prevented from being influenced by the deviation of the processing body 3.

Specifically, main shaft 1, joint body 2 and processing body 3 all set up on same central axis, because the screw tap rotates just can realize the processing to the part, and this kind of setting has guaranteed the axiality of screw tap, reduces the parts machining error, has guaranteed the yield of part.

Referring to fig. 1, the machined body 3 is further provided with a spiral groove 33, and the spiral groove 33 is opened around the machined body 3. By arranging the spiral groove 33, cooling liquid can enter the workpiece along the spiral groove 33 to cool the machining part of the workpiece and the machining body 3, which is beneficial to the machining of parts and prolongs the service life of the tap. Meanwhile, by arranging the spiral groove 33, machined chips can be discharged from the spiral groove 33 in time.

Specifically, the spiral groove 33 extends from one end of the machining body 3 near the main shaft 1 to the other end, and surrounds the machining body 3 by one turn. The number of the spiral grooves 33 is at least two, and in the present embodiment, the number of the spiral grooves 33 is three. Because when the part is machined, the introduction of the cooling liquid and the discharge of the cutting chips are carried out simultaneously, the introduction of the cooling liquid and the discharge of the cutting chips can be better ensured by arranging at least two spiral grooves 33, and the normal machining of the part is ensured by simultaneously and normally carrying out two processes. The number of the spiral grooves 33 may also be two or four, and the number may be adjusted accordingly according to different materials to be processed, and the specific number is not limited.

Every two helical grooves 33's interval everywhere is the same, through this kind of setting for processing body 3 is when processing the part, and every department all the atress is even, causes local damage when avoiding its local atress inhomogeneous, and then leads to the screw tap to scrap. Because the screw tap rotates at a high speed when parts are machined, if one part of the screw tap is stressed unevenly, the machined body 3 is likely to be damaged locally, the three spiral grooves 33 are arranged in the embodiment, and the distances from the middle spiral groove 33 to the spiral grooves 33 on the two sides are equal, so that the stress at each part of the machined body 3 is ensured to be even when the parts are machined, and the phenomenon that the part of the machined body is damaged due to uneven stress during the screw tap machining is avoided.

Further, the clamping body 2 is provided with at least one group of clamping planes 21 which are convenient for clamping the rotating parts of the machine tool. In this embodiment, two sets of holding planes 21 are provided, i.e., the entire engaging body 2 is in a square shape. The edges of the clamping plane 21 need to be rounded to avoid scratching the operator. Through setting up centre gripping plane 21, the centre gripping of the lathe rotating member of being convenient for, and difficult rocking after the centre gripping has ensured the steadiness after the screw tap installation.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A thread guide rework tap, comprising:

a main shaft (1);

the clamping body (2) is positioned at one end of the main shaft (1) and can be installed on a rotating part of a machine tool; and

the machining body (3) is located at the other end of the main shaft (1) and comprises a rotary cutting body (31) located at one end of the clamping body (2) and a guide head (32) located at one end of the rotary cutting body (31), a tapping thread (311) is arranged on the rotary cutting body (31), a guide thread (321) is arranged on the guide head (32), and the shape and the rotating direction of the guide thread (321) and the shape and the rotating direction of the tapping thread (311) are the same.

2. A thread guiding rework tap according to claim 1, characterized in that said rotary cutting body (31) is provided integrally with said guiding head (32).

3. A thread guide rework tap according to claim 1, characterized in that said guide thread (321) is smaller than said tapping thread (311) by an accuracy level.

4. A thread-guided rework tap according to claim 1, characterized in that the spindle (1), the snap-in body (2) and the work body (3) are all arranged on the same central axis.

5. A thread guided rework tap according to claim 1, characterized in that said working body (3) is provided with a spiral groove (33), said spiral groove (33) being provided around said working body (3).

6. A thread pilot rework tap according to claim 5, characterized in that said spiral flutes (33) are at least two in number.

7. A thread guiding rework tap according to claim 6, characterized in that every two of said spiral flutes (33) are equally spaced from place to place.

8. A thread-guided rework tap according to claim 1, characterized in that said snap-in body (2) is provided with at least one set of clamping planes (21) facilitating clamping of rotating parts of the machine tool.

9. A thread guiding rework tap according to claim 7, characterized in that both the rotary cutting body (31) and the guiding head (32) are of cemented carbide material.