Two-stage electric die head

Abstract

The utility model belongs to electric tool technical field especially relates to two -segment type electric threading machine plate tooth, including handle body and plate tooth blade, the front end of handle body is equipped with plate tooth blade, the back of handle body is equipped with locating groove, the size and the opening position of locating groove match with the plate tooth head of suitable specification electric threading machine, its characterized in be all, handle body is divided into two sections along the length direction, the upper processing of front section has plate tooth blade, the upper processing of rear section has locating groove, and front section and rear section are connected through dovetail tenon pairing split, the rear section is equipped with screw hole, and the sinking inclined plane of split connection place is sunk on the screw hole, and the screw hole axis is perpendicular to the one side of dovetail tenon and is matched with inclined plane, and the screw hole is equipped with screw. The utility model has the beneficial effects that: plate tooth adopts two -segment type structure, and the handle body and plate tooth blade of plate tooth are divided into two sections, and one plate tooth is formed through dovetail tenon split structure, when plate tooth blade is damaged, can only replace the section of plate tooth blade, and the handle body can be repeatedly used, realizes the goal of reducing production cost.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, and in particular relates to a two-stage electric threading machine die. Background Technology

[0002] An electric threading machine is an electric tool equipped with a forward and reverse rotation device for processing external threads on pipes. It is also known as an electric pipe cutting and threading machine, threading machine, pipe threading machine, etc. The threading machine consists of a machine body, electric motor, gearbox, pipe chuck, die head, cutter holder, feed device and cooling system. It realizes the electrification of manual pipe threading, making pipe thread processing during pipeline installation easier and faster, and reducing the labor intensity of pipeline installation workers.

[0003] A die is essentially a nut with high hardness. Several chip removal holes are formed around the threaded hole, and cutting cones are typically ground at both ends of the hole. Dies are classified into round dies, square dies, hexagonal dies, and tubular dies according to their shape and application. Round dies are the most widely used, with a specification range of M0.25-M68 mm. When the pitch diameter of the machined thread exceeds the tolerance, the adjusting groove on the die can be cut to adjust the thread pitch diameter. Dies can be mounted in a die wrench for manual thread machining or mounted in a die holder for use on machine tools. While dies produce threads with lower precision, their simple structure and ease of use make them widely used in single-piece, small-batch production and repair applications.

[0004] Dies are the most common wear parts of threading machines. A set of standard dies has four cutting edges with different thread starting points. If one of them is damaged, the entire set of dies must be replaced. Therefore, dies are the most vulnerable parts in threading machines. Current threading machine dies all use a single-head, single-edge structure, and their service life is generally no more than 500 cycles. Even a set of high-speed steel dies has a service life of no more than 1,000 cycles. The wear and tear is very high, and they are also expensive, resulting in high investment costs. Utility Model Content

[0005] The purpose of this utility model is to provide a two-section electric threading machine die that overcomes the shortcomings of the prior art. It adopts a two-section structure, dividing the die shank and the die cutting edge into two sections, which are joined together by a dovetail tenon structure to form a die. When the die cutting edge is damaged, only the cutting edge section can be replaced, and the shank can be reused, thereby reducing production costs.

[0006] To achieve the above objectives, this utility model employs the following technical solution: A two-section electric threading machine die includes a shank and a die blade. The front end of the shank has a die blade, and the rear side of the shank has a positioning groove. The size and position of the positioning groove match the die head of the applicable electric threading machine. The shank is divided into two sections along its length. The front section is machined with a die blade, and the rear section is machined with a positioning groove. The front and rear sections are connected by dovetail tenons. The rear section has a screw hole, which is located on a recessed inclined surface at the joint. The axis of the screw hole is perpendicular to one side of the dovetail tenon's mating inclined surface, and a screw is installed in the screw hole.

[0007] Furthermore, the screw is a socket head cap screw with a diameter of 3-5mm and a length of 6-8mm.

[0008] Furthermore, the dovetail tenon has a bevel angle of 7-14°.

[0009] Furthermore, a copper pad with a thickness of 0.1-0.25mm is provided on the beveled surface of the dovetail tenon against which the screw rests.

[0010] Furthermore, the front and rear sections may be made of the same or different materials.

[0011] Furthermore, the front end is fitted with a plastic sheath, the length of which covers the splicing joint.

[0012] Furthermore, the screw hole is a countersunk hole. After the screw is assembled, the top of the screw is completely or partially sunk into the countersunk hole, and the highest point of the screw is not higher than the maximum outer contour of the rear section.

[0013] Compared with the prior art, the beneficial effects of this utility model are: The die adopts a two-section structure, dividing the die handle and the die blade into front and rear sections, which are joined together by a dovetail tenon structure to form a die. When the die blade is damaged, only the die blade section can be replaced, while the handle can be reused, thus achieving the goal of reducing production costs. The materials of the front and rear sections can be the same or different. To improve service life, the front section can be made of high-speed steel, while the rear section can be made of low-cost medium carbon steel. This can meet the strength requirements, reduce the manufacturing cost, improve the processing accuracy of the electric threading machine, and significantly reduce the maintenance cost of the electric threading machine. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; In the diagram: 1-Handle body, 2-Die edge, 3-Positioning groove, 4-Front section, 5-Rear section, 6-Dovetail tenon, 7-Plastic sheath, 8-Matching bevel, 9-Screw, 10-Recessed bevel. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0017] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0018] See Figure 1 This is a schematic diagram of the structure of a two-section electric threading machine die embodiment of this utility model. It includes a handle 1 and a die blade 2. The front end of the handle 1 has the die blade 2, and the rear side of the handle 1 has a positioning groove 3. The size and position of the positioning groove 3 match the die head of the applicable specification electric threading machine. The handle 1 is divided into two sections along its length. The front section 4 is machined with the die blade 2, and the rear section 5 is machined with the positioning groove 3. The front section 4 and the rear section 5 are connected by a dovetail tenon 6. The rear section 5 has screw holes, which are located on a recessed inclined surface 10 at the connection point. The axis of the screw hole is perpendicular to one side of the dovetail tenon 6 and the mating inclined surface 8. Even if the recessed inclined surface 10 is parallel to the mating inclined surface 8, a screw 9 is installed in the screw hole. In this embodiment, there are two screws 9, but three can also be used. The screw holes are countersunk holes. After the screws 9 are installed, the top of the screw 9 is completely or partially recessed into the countersunk hole, and the highest point of the screw 9 is not higher than the maximum outer contour of the rear section 5. Screw 9 is a socket head cap set screw with a diameter of 3-5mm and a length of 6-8mm, with a preferred diameter of 5mm and a length of 8mm.

[0019] The bevel angle of the dovetail tenon 6 is 7-14°, preferably 8-12°. A copper pad with a thickness of 0.1-0.25mm can also be provided on the beveled surface of the dovetail tenon against which the screw 9 rests. The copper pad can ensure a tight fit and reduce assembly errors and wear on the top surface.

[0020] The materials of the front section 4 and the rear section 5 can be the same or different. The front section 4 can be made of high-speed steel, while the rear section 5 can be made of low-cost medium carbon steel. This can meet the strength requirements, reduce the manufacturing cost, help improve the processing accuracy of the electric threading machine, and significantly reduce the maintenance cost of the electric threading machine.

[0021] As a product protection measure, a plastic sleeve 7 is fitted at the front end of section 4. The length of the plastic sleeve 7 covers the joint to prevent moisture from entering and causing rust.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A two-stage electric threading machine die, comprising a shank and a die cutting edge, wherein the front end of the shank is provided with the die cutting edge, and the rear side of the shank is provided with a positioning groove, the size and position of the positioning groove being matched with the die head of an electric threading machine of applicable specifications, characterized in that, The handle is divided into two sections along its length. The front section is machined with a toothed edge, and the rear section is machined with a positioning groove. The front and rear sections are connected by dovetail tenons. The rear section is provided with a screw hole, which is located on a recessed inclined surface at the joint. The axis of the screw hole is perpendicular to one side of the dovetail tenon and fits the inclined surface. A screw is installed in the screw hole.

2. The two-stage electric threading machine die according to claim 1, characterized in that, The screw is a socket head cap screw with a diameter of 3-5mm and a length of 6-8mm.

3. The two-stage electric threading machine die according to claim 1, characterized in that, The dovetail tenon has a bevel angle of 7-14°.

4. The two-stage electric threading machine die according to claim 1, characterized in that, The dovetail tenon against which the screw rests is provided with a copper pad, the copper pad being 0.1-0.25mm thick.

5. The two-stage electric threading machine die according to claim 1, characterized in that, The front and rear sections may be made of the same or different materials.

6. The two-stage electric threading machine die according to claim 1, characterized in that, The front end is fitted with a plastic sleeve, the length of which covers the splicing joint.

7. The two-stage electric threading machine die according to claim 1, characterized in that, The screw hole is a countersunk hole. After the screw is assembled, the top of the screw is completely or partially sunk into the countersunk hole, and the highest point of the screw is not higher than the maximum outer contour of the rear section.

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