Portable circular die replacing structure for handheld die head threading machine

Abstract

The utility model relates to a portable circular die replacing structure for a handheld die head threading machine. The split type die is characterized in that the split type die comprises a circular die, a lining set screw, a lining, a split type die head and a die head set screw, a lining positioning hole is formed in the wall face of the circular die, a lining positioning through hole and a die head positioning hole are formed in the wall face of the lining, the circular die is sleeved with the lining, and the die head set screw is arranged on the lining. The bushing set screws are fixed in the bushing positioning through holes and the bushing positioning holes; the split type threading die head comprises a connecting sleeve and a connecting base used for being fixed to the handheld electric threading machine, the connecting sleeve is fixed to the connecting base, a threading die head positioning through hole matched with the threading die head positioning hole is formed in the wall face of the connecting sleeve, the lining is arranged in the connecting sleeve of the split type threading die head in a sleeved mode, and the lining is arranged on the connecting base. And the threading die head set screw is fixed in the threading die head positioning through hole and the threading die head positioning hole. The device is reasonable in structural design and convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of threading machines, and in particular to a portable replacement structure for a round die in a handheld threading machine. Background Technology

[0002] Handheld threading machines are mainly used for machining external threads on pipe fittings and are applied in various pipeline construction projects. They are widely used due to their small size, ease of operation, portability, and low cost. Handheld threading machines can thread different specifications of pipe threads by changing the type of die, expanding their applicability. However, existing handheld threading machines cannot install conventional round dies, preventing them from threading and re-threading round steel bars. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a portable replacement structure for a round die of a handheld threading machine that has a reasonable structural design and is easy to disassemble and assemble.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: The portable replacement structure for a round die used in a handheld threading machine is characterized by including a round die, a bushing set screw, a bushing, a split die head, and a die head set screw. The wall surface of the round die is provided with a bushing positioning hole, and the wall surface of the bushing is provided with a bushing positioning through hole and a die head positioning hole. The position of the bushing positioning through hole on the bushing matches the position of the bushing positioning hole on the round die. The round die is fitted inside the bushing. The set screw is fixed in the bushing positioning through hole and the bushing positioning hole to fix the round die and the bushing together; the split die head includes a connecting sleeve and a connecting seat for fixing to a handheld electric threading machine. The connecting sleeve is fixed on the connecting seat. The wall surface of the connecting sleeve is provided with a die head positioning through hole that matches the die head positioning hole. The bushing is fitted inside the connecting sleeve of the split die head. The die head set screw is fixed in the die head positioning through hole and the die head positioning hole to fix the bushing and the connecting sleeve together.

[0005] Preferably, the present invention has four bushing set screws, four bushing positioning holes on the round die, and four bushing positioning through holes on the bushing. One bushing set screw, one bushing positioning hole, and one bushing positioning through hole form a corresponding set.

[0006] Preferably, the present invention has four set screws for the die head, four die head positioning through holes on the connecting sleeve, and four die head positioning holes on the bushing. One die head set screw, one die head positioning through hole, and one die head positioning hole form a corresponding set.

[0007] Compared with the prior art, this utility model has the following advantages and effects: it solves the problems of existing round dies not being able to provide stable and continuous rotational torque when manually re-threading, and the inability of handheld electric threading machines to install existing round dies for threading and re-threading round steel bars. The split die head with bushing allows for replacement of only the bushing when changing to different specifications of round dies, eliminating the need to replace the entire split die head, greatly facilitating the replacement of different specifications of round dies and simplifying maintenance and operation. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the drawings used in the description of the embodiments and / or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural schematic diagram of a portable replacement structure for a handheld threading machine's round die, as described in an embodiment of this utility model.

[0010] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the portable replacement structure for a handheld threading machine's round die in an embodiment of this utility model.

[0011] Figure 3 This is a partial cross-sectional perspective view of the portable replacement structure for a round die used in a handheld threading machine, according to an embodiment of this utility model.

[0012] Figure 4 This is a three-dimensional structural diagram of the bushing in an embodiment of the present utility model.

[0013] Figure 5 This is an exploded structural diagram of the portable replacement structure for a round die used in a handheld threading machine, according to an embodiment of this utility model.

[0014] Figure 6 This is an exploded view of the portable replacement structure for the round die of the handheld threading machine, the round steel bar to be processed, and the handheld electric threading machine together in an embodiment of this utility model.

[0015] In the diagram: 1-Round steel bar; 2-Round die; 3-Bushing set screw; 4-Bushing; 5-Split die head; 6-Handheld electric threading machine; 7-Die head set screw; 21-Bushing positioning hole; 41-Bushing positioning through hole; 42-Die head positioning hole; 51-Connecting sleeve; 52-Connecting seat; 53-Die head positioning through hole. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0017] Example

[0018] See Figures 1 to 6 The portable replacement structure for the round die of the handheld threading machine in this embodiment includes a round die 2, a bushing set screw 3, a bushing 4, a split die head 5, and a die head set screw 7.

[0019] In this embodiment, the wall surface of the round die 2 is provided with a bushing positioning hole 21, and the wall surface of the bushing 4 is provided with a bushing positioning through hole 41 and a die head positioning hole 42. The position of the bushing positioning through hole 41 on the bushing 4 matches the position of the bushing positioning hole 21 on the round die 2. The round die 2 is fitted inside the bushing 4, and the bushing set screw 3 is fixed in the bushing positioning through hole 41 and the bushing positioning hole 21. The round die 2 and the bushing 4 are fixed together by the bushing set screw 3.

[0020] In this embodiment, the split die head 5 includes a connecting sleeve 51 and a connecting seat 52 for fixing to a handheld electric threading machine 6. The connecting sleeve 51 is fixed on the connecting seat 52. The wall surface of the connecting sleeve 51 is provided with a die head positioning through hole 53 that matches the die head positioning hole 42. The bushing 4 is fitted inside the connecting sleeve 51 of the split die head 5. The die head set screw 7 is fixed in the die head positioning through hole 53 and the die head positioning hole 42. The bushing 4 and the connecting sleeve 51 are fixed together by the die head set screw 7.

[0021] In this embodiment, there are four bushing set screws 3, four bushing positioning holes 21 on the round die 2, and four bushing positioning through holes 41 on the bushing 4. Among them, one bushing set screw 3, one bushing positioning hole 21 and one bushing positioning through hole 41 form a group and correspond to each other.

[0022] In this embodiment, there are four die head set screws 7, four die head positioning through holes 53 on the connecting sleeve 51, and four die head positioning holes 42 on the bushing 4. Each die head set screw 7, die head positioning through hole 53, and die head positioning hole 42 are a group and correspond to each other.

[0023] In this embodiment, the split die head 5 is installed in the power output section of the handheld electric threading machine 6. Since the outer diameter of the round die 2 varies depending on its specifications, different specifications of round dies 2 will have corresponding bushings 4. The bushings 4 are fixed to the round die 2 using bushing set screws 3. The bushings 4 have a uniform outer diameter for connecting with the split die head 5. The outer side of the bushing 4 is fixed to the split die head 5 using die head set screws 7. After fixing, threading and rewinding of the round steel bar 1 can begin.

[0024] The method for threading and re-threading the round steel bar 1 is as follows: First, fix the round steel bar 1, align the center of the round die 2 with the center of the round steel bar 1 and keep the end faces flat. At this time, use pipe clamps or other tools to fix the handheld electric threading machine 6, mainly fixing the rotation direction of the handheld electric threading machine 6 relative to the pipe fitting. Then, turn on the handheld electric threading machine 6 to rotate it clockwise and drive the split die head 5 to rotate clockwise. Push the handheld electric threading machine 6 by hand to make the round die 2 fit onto the round steel bar 1. At this time, threading the round steel bar 1 begins. When the threaded length is sufficient, stop the operation of the handheld electric threading machine 6 and turn the handheld electric threading machine 6 to rotate it counterclockwise and drive the split die head 5 to rotate counterclockwise to re-thread the round die 2. After all the threads are re-threaded, the threading is completed.

[0025] The thread re-threading operation is mainly performed on round steel bars 1 that already have threaded ends but whose threads are damaged. The damaged threads can be repaired simply by repeatedly threading such round steel bars 1. The steps for thread re-threading are the same as those for threading.

[0026] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A die portable replacement structure for a hand-held threading machine, characterized by: The application relates to a split die head (5) and a die head fastening screw (7), the split die head (5) comprising a connecting sleeve (51) and a connecting seat (52) for being fixed to a handheld electric threading machine (6), the connecting sleeve (51) being fixed to the connecting seat (52), the wall surface of the connecting sleeve (51) being provided with a die head positioning through hole (53) matched with the die head positioning hole (42), the sleeve (4) being sleeved in the connecting sleeve (51) of the split die head (5), and the die head fastening screw (7) being fixed in the die head positioning through hole (53) and the die head positioning hole (42) so as to fix the sleeve (4) and the connecting sleeve (51).

2. The die set portable changing structure for a hand-held threading machine according to claim 1, characterized in that: The number of the sleeve fastening screws (3) is four, the number of the sleeve positioning holes (21) on the round die (2) is four, the number of the sleeve positioning through holes (41) on the sleeve (4) is four, one sleeve fastening screw (3), one sleeve positioning hole (21) and one sleeve positioning through hole (41) form a corresponding group.

3. The die set portable changing structure for a hand-held threading machine according to claim 1, characterized in that: The number of the die head fastening screws (7) is four, the number of the die head positioning through holes (53) on the connecting sleeve (51) is four, and the number of the die head positioning holes (42) on the sleeve (4) is four, one die head fastening screw (7), one die head positioning through hole (53) and one die head positioning hole (42) form a corresponding group.

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