Composite screw-type internal tooth knife

Abstract

The utility model relates to a numerical control lathe tool, in particular to a composite rotary opening type internal tooth cutter which comprises a cutter handle. A machining end is arranged at the lower end of the cutter handle, two cutting edges are formed in the rotating direction of the side, away from the cutter handle, of the machining end in a circular array mode, and an inner tooth cutting edge is formed in the middle of the machining end and is of a tooth-hook-shaped protruding structure. Grooves are formed in the machining ends in the rotating direction close to the cutting edges respectively. The internal tooth cutter has the advantages that the rotary wing type cutting edge, the tooth-hook-shaped protruding internal tooth cutting edge and the spiral groove are formed in the machining end, in the internal tooth machining process, the cutting edge of the rotary wing type structure can achieve front end cutting, meanwhile, the working load of the internal tooth cutter is relieved, and the machining efficiency is improved. And the cutter bar cannot be broken due to the fact that the end of the cutter touches the bottom in the machining process, the service life of the tool is prolonged, the machining efficiency is improved, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to a CNC lathe tool, in particular to a composite rotary mouth internal thread cutter. Background Art

[0002] There are now clamp-blade locking internal thread cutters and double-edged inlaid internal thread cutters on the market, but these two types of cutters are generally limited by the aperture of the workpiece during processing (it is difficult to use the above-mentioned cutters for internal thread processing of workpieces with an aperture of less than 6 mm). Moreover, the above-mentioned tools usually have problems such as poor chip removal, overheating of the workpiece and the blade, excessive force on the tool, easy wear, blade falling off, the end of the tool touching the bottom and causing the blade to break, and the tool rod breaking during the production process, resulting in large tool wear. In addition, it is inconvenient to order the blade, which makes the tool use cost high. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the utility model provides a technical solution that can solve the above-mentioned problems.

[0004] A composite screw-mouth internal tooth cutter comprises a handle;

[0005] The lower end of the handle is provided with a processing end portion, and the processing end portion is formed with two cutting edges in a circular array in the rotation direction of the side away from the handle, and the two cutting edges cooperate with each other to form a rotor-type structure;

[0006] An inner tooth blade is formed in the middle of the processing end, and the inner tooth blade is a tooth hook-shaped protrusion structure;

[0007] The processing end portion is respectively formed with grooves in the rotation direction close to the cutting edge, the grooves are in a spiral structure, and one end of the groove passes through the inner tooth blade and extends to the tool handle.

[0008] As a further solution of the present invention, auxiliary blades are respectively formed on the upper and lower sides of the inner tooth blade.

[0009] As a further solution of the present invention, the end surface of the processed end portion close to the cutting edge is gradually inclined from the inside to the outside toward the side away from the cutting edge.

[0010] As a further solution of the present invention: a clearance groove is formed on one side of the groove close to the cutting edge.

[0011] As a further solution of the present invention, the knife handle and the processing end portion are integrally formed by metal powder metallurgy die-casting and sintering.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by forming a rotor-shaped cutting edge, an internal tooth blade with a tooth hook-shaped protrusion, and a spiral groove on the processing end, the rotor-shaped cutting edge can achieve front-end cutting during the internal tooth processing process, while reducing the workload of the internal tooth cutter, and the cutter bar will not be broken due to the end of the tool touching the bottom during the processing, thereby extending the service life of the tool, improving processing efficiency, and saving production costs;

[0013] The spiral groove chip removal method of front milling and back turning can make the slag discharge of the workpiece smoother during the internal thread processing, perfectly avoiding the tool loss caused by slag blockage and greatly reducing the product defect rate.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the following briefly introduces the drawings required for use in the embodiment or the prior art description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 It is a structural diagram of the processing end.

[0018] Figure 3 It is a side view of the machined end.

[0019] As shown in the figure: 1. Tool handle; 2. Processing end; 3. Cutting edge; 4. Internal cutting edge; 5. Groove; 6. Auxiliary cutting edge; 7. Avoidance groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as a limitation on the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0023] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] See also Figure 1-3 , a composite screw-mouth internal tooth cutter, comprising a handle 1;

[0025] The lower end of the handle 1 is provided with a processing end 2, and the processing end 2 is formed with two cutting edges 3 in a circular array in the rotation direction on the side away from the handle 1, and the two cutting edges 3 cooperate with each other to form a rotor-type structure;

[0026] An inner tooth blade 4 is formed in the middle of the processing end portion 2, and the inner tooth blade 4 is a tooth hook-shaped protrusion structure;

[0027] The processing end portion 2 is formed with grooves 5 in the rotation direction close to the cutting edge 3. The grooves 5 are spiral structures. One end of the groove 5 passes through the inner tooth cutting edge 4 and extends to the handle 1.

[0028] By forming a rotor blade edge 3, an internal tooth blade edge 4 with a tooth hook protrusion and a spiral groove 5 on the processing end portion 2, the rotor blade edge 3 can enable the tool to achieve front-end cutting, which can reduce the workload of the internal tooth cutter and extend the service life of the tool;

[0029] The spiral groove 5 chip removal method of front milling and back turning can make the slag discharge of the workpiece smoother during the processing, perfectly avoiding the tool loss caused by slag blockage and greatly reducing the defective rate of products;

[0030] The tool adopts a load-reducing design of front milling and back turning, so that it is not limited by the aperture of the workpiece to be processed. It can process the internal threads of the workpiece that cannot be processed by ordinary taps and internal thread cutters, thereby improving its efficiency.

[0031] Furthermore, auxiliary blades 6 are formed on the upper and lower sides of the inner tooth blade 4 respectively.

[0032] The working load of the inner tooth cutting edge 4 can be reduced, and the service life of the tool can be extended.

[0033] Furthermore, the end surface of the processed end portion 2 on the side close to the cutting edge 3 is gradually inclined from the inside to the outside toward the side away from the cutting edge 3 .

[0034] The cutting ability of the cutting edge 3 can be effectively improved.

[0035] Furthermore, a clearance groove 7 is formed on one side of the groove 5 close to the cutting edge 3 .

[0036] It is possible to facilitate the movement of slag into the groove 5 and discharge it outwards.

[0037] Furthermore, the shank 1 and the processing end portion 2 are integrally formed by metal powder metallurgy die-casting and sintering.

[0038] It effectively enhances the heat dissipation, service strength and workpiece processing precision of the entire tool.

[0039] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite rotary internal tooth cutter, characterized by: comprising a knife handle (1); The lower end of the knife handle (1) is provided with a processing end portion (2), and two cutting edges (3) are formed in a circular array in the rotation direction on the side of the processing end portion (2) away from the knife handle (1), and the two cutting edges (3) cooperate with each other to form a rotor-type structure; An inner tooth blade (4) is formed in the middle of the processing end portion (2), and the inner tooth blade (4) is a tooth hook-shaped protrusion structure; The processing end portion (2) is respectively formed with grooves (5) in the rotation direction close to the cutting edge (3), the grooves (5) are in a spiral structure, and one end of the groove (5) passes through the inner tooth blade (4) and extends to the handle (1).

2. The composite rotary-mouth internal tooth cutter according to claim 1, characterized in that: Auxiliary blades (6) are respectively formed on the upper and lower sides of the inner tooth blade (4).

3. The composite rotary-mouth internal dental knife according to claim 1, characterized in that: The end surface of the processed end portion (2) on the side close to the cutting edge (3) is gradually inclined from the inside to the outside toward the side away from the cutting edge (3).

4. The composite rotary-mouth internal tooth cutter according to claim 1, characterized in that: A side of the groove (5) close to the cutting edge (3) is respectively formed with a clearance groove (7).

5. The composite rotary-mouth internal tooth cutter according to claim 1, characterized in that: The knife handle (1) and the processing end portion (2) are integrally formed by metal powder metallurgy die-casting and sintering.

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