Manual tapping adjustment and positioning mechanism, manual tapping device and tapping method

Abstract

The present invention proposes a manual tapping adjustment and positioning mechanism, a manual tapping device and a tapping method. The adjustment and positioning device comprises a die seat, an adjustment bracket, a first star bracket and a second star bracket which are sequentially rotated and installed on the lower surface of the die seat along the circumferential direction of the die seat and are located in the same plane; the first star bracket, the second star bracket and the adjustment bracket all comprise an arc segment; the concave side surfaces of the three arc segments all face the central axis direction of the die and enclose a receiving space; the first star bracket and the adjustment bracket, the first star bracket and the second star bracket are all hinged through a connecting plate; the first star bracket and the lower surface of the die seat are connected through a tension spring. Therefore, the present invention completes the guiding and pressing positioning during tapping through the die seat, the adjustment bracket, the first star bracket, the second star bracket and the tension spring, and the parts to be tapped are not prone to lateral deviation, have high coaxiality with the die and are accurately positioned.

Description

Technical Field

[0001] The invention belongs to the technical field of hardware tool wrenches, and in particular relates to a manual tapping adjustment and positioning mechanism, a manual tapping device and a tapping method. Background Art

[0002] The process of making threads is called tapping. The tapping of standard parts is usually done by large tapping machines. For the processing of threads on non-standard parts, manual tapping is mostly used. Different tapping devices are selected to complete the process according to the difference between manufacturing internal threads and external threads. The tapping of internal threads is usually completed by tapping, and the tapping of external threads is usually completed by tapping. The tapping die is generally fixed by a tapping die holder with symmetrical fixed rollers on both sides. When using it, the teeth of the tapping die are placed on the tapping steel bar, and the tapping die is rotated by the tapping die holder to process the external thread on the steel bar. When using the tapping die for processing, the center axis of the tapping die must be ensured to be coaxial with the steel bar.

[0003] However, in the prior art, when tapping by hand, people need to watch with their eyes and then adjust the die frame continuously to achieve the centering of the two, which is difficult to operate, inefficient, and has a poor tapping effect. Summary of the invention

[0004] The purpose of the present invention is to provide a manual tapping adjustment and positioning mechanism, a manual tapping device and a tapping method that are accurate in positioning and convenient in tapping. To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A manual tapping adjustment and positioning mechanism comprises a die seat, wherein a die is arranged in the die seat, and further comprises an adjustment bracket, a first star bracket and a second star bracket which are rotatably mounted on the lower surface of the die seat and located in the same plane in sequence along the circumferential direction of the die seat;

[0006] The first star-shaped bracket includes a first arc segment; the second star-shaped bracket includes a second arc segment; the adjustment bracket includes an adjustment arc segment;

[0007] The inner concave side surface of the first arc segment, the inner concave side surface of the second arc segment and the inner concave side surface of the adjusting arc segment are all oriented toward the central axis of the die; the first arc segment, the second arc segment and the adjusting arc segment enclose an accommodation space; the central axis of the die passes through the accommodation space;

[0008] The outer end of the first arc segment and the outer end of the adjustment bracket, and the convex side surface of the first arc segment and the outer end of the second arc segment are hinged through a connecting plate; the convex side surface of the second arc segment and the lower surface of the die seat are connected through a tension spring.

[0009] Preferably, the first star-shaped bracket also includes a first straight segment, which is formed on the convex side of the first arc segment. One end of the first straight segment is away from the first arc segment and is hinged to the outer end of the second arc segment through the connecting plate.

[0010] Preferably, the second star-shaped bracket also includes a second straight line segment, which is formed on the convex side surface of the second arc segment. The second straight line segment is away from one end of the second arc segment and is connected to the lower surface of the die seat through the tension spring.

[0011] Preferably, the adjustment bracket also includes an adjustment straight line segment, which is formed on the convex side of the adjustment arc segment. One end of the adjustment straight line segment is away from the adjustment arc segment and is hinged to the outer end of the first arc segment through the connecting plate.

[0012] Preferably, the adjustment bracket further includes an adjustment handle, and the adjustment handle is formed at the outer end of the adjustment arc segment.

[0013] Preferably, the adjustment bracket, the first star-shaped bracket and the second star-shaped bracket are arranged in a clockwise direction.

[0014] A manual tapping device comprises the manual tapping adjustment and positioning mechanism, and also comprises a tapping handle, wherein the tapping handle is arranged on the outer circumference of the die seat.

[0015] A manual tapping method, based on a manual tapping device, comprises the following steps:

[0016] Step 1: Place the lower surface of the die seat downward, then hold and rotate the adjustment bracket so that the accommodation space enclosed by the first arc segment, the second arc segment and the adjustment arc segment is increased; during the rotation of the adjustment bracket, the first arc segment and the second arc segment are linked with the adjustment bracket, and the tension spring is in a tensioned state;

[0017] Step 2: Place the cylindrical strip of the part to be tapped into the accommodating space and the die, then release the adjusting bracket, the first arc segment, the second arc segment and the adjusting arc segment all rotate in the opposite direction, the tension spring retracts and is in a stretched state, until the first arc segment, the second arc segment and the adjusting arc segment all contact the outer circumference of the part to be tapped, the adjusting bracket, the first star bracket and the second star bracket stop rotating, and the pressing and positioning process of the part to be tapped is completed;

[0018] Step 3: Use the tapping handle to turn the die holder to perform thread processing on the cylindrical strip part.

[0019] Compared with the prior art, the advantages of the present invention are as follows: the adjusting bracket is held and rotated, so that the accommodation space enclosed by the adjusting bracket, the first star bracket and the second star bracket is enlarged; during the rotation of the adjusting bracket, the first star bracket and the second star bracket are linked with the adjusting bracket, and the tension spring is in a stretched state; then the cylindrical bar part of the part to be tapped is placed in the accommodation space and the die, and then the adjusting bracket is released, and the adjusting bracket, the first star bracket and the second star bracket are all reversely rotated under the action of the tension spring, and the tension spring is retracted and in a stretched state, until the adjusting bracket, the first star bracket and the second star bracket are all in contact with the outer circumference of the part to be tapped, the adjusting bracket, the first star bracket and the second star bracket stop rotating and are pressed against the cylindrical bar part under the tension of the tension spring to complete the pressing and positioning process of the part to be tapped. Thus, the guiding and pressing positioning during tapping are completed by the die seat, the adjusting bracket, the first star bracket, the second star bracket and the tension spring, the part to be tapped is not easy to deviate, the coaxiality with the die is high, the positioning is more accurate, and the thread processing quality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a manual tapping device according to an embodiment of the present invention;

[0021] Figure 2 When the lower surface of the die seat faces upward, Figure 1 A three-dimensional diagram of the manual tapping adjustment and positioning mechanism;

[0022] Figure 3 A schematic diagram of the clamping and positioning of the parts to be tapped;

[0023] Figure 4 State diagram of the manual tapping device before tapping;

[0024] Figure 5 It is a tapping state diagram of a manual tapping device;

[0025] Figure 6 for Figure 1 A three-dimensional diagram of the first star-shaped bracket;

[0026] Figure 7 for Figure 1 A perspective view of the middle adjustment bracket.

[0027] Among them, 1-left handle, 2-first star-shaped bracket, 21-first arc segment, 22-first straight segment, 3-connecting plate, 4-adjusting bracket, 41-adjusting arc segment, 42-adjusting straight segment, 43-adjusting handle, 5-right handle, 6-fixing pin, 7-die, 8-tension spring, 9-positioning screw, 10-connecting screw, 11-die seat, 12-parts to be tapped. DETAILED DESCRIPTION

[0028] The present invention will be described in more detail below in conjunction with the schematic diagram, wherein the preferred embodiment of the present invention is shown, and it should be understood that those skilled in the art can modify the present invention described herein, and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art, and not as a limitation of the present invention.

[0029] like Figures 1 to 7 As shown, a manual tapping device includes a manual tapping adjustment and positioning mechanism and a tapping handle (a left handle 1 and a right handle 5), the tapping handle is threadedly connected to the outer circumference of the die seat 11; the lower surface of the die seat 11 is provided with three screw holes for rotatably installing the adjustment bracket 4, the first star-shaped bracket 2 and the second star-shaped bracket, and one pin hole for fixing the tension spring 8.

[0030] The manual tapping adjustment and positioning mechanism comprises a die seat 11, an adjustment bracket 4, a connecting plate 3, a first star-shaped bracket 2, a second star-shaped bracket and a tension spring 8. A die 7 is arranged in the die seat 11 (the inner hole of the die seat 11 is installed and fixed with an interference fit), and the adjustment bracket 4, the first star-shaped bracket 2 and the second star-shaped bracket are successively installed on the lower surface of the die seat 11 in a clockwise rotation along the circumferential direction of the die seat 11 and are located in the same plane. That is, the adjustment bracket 4, the first star-shaped bracket 2 and the second star-shaped bracket are connected to the die seat 11 in the same rotational connection manner. Specifically, taking the adjustment bracket 4 as an example, a threaded section of a positioning screw 9 is installed in a screw hole on the lower surface of the die seat 11, and the smooth section of the positioning screw 9 passes through the adjustment bracket 4. A gap is arranged between the adjustment bracket 4 and the die seat 11, and the adjustment bracket 4 rotates around the positioning screw 9, and the positioning screw 9 is equivalent to a rotating shaft for the adjustment bracket 4 to rotate.

[0031] The first star-shaped bracket 2 includes a first arc segment 21 and a first straight segment 22. The first straight segment 22 is formed on the outer convex side surface of the first arc segment 21. One end of the first straight segment 22 is away from the first arc segment 21 and is hinged to the outer end of the second arc segment through a connecting plate 3. Specifically, one end of the connecting plate 3 connected to the first straight segment 22 and one end connected to the second arc segment are both sleeved on a smooth section of a connecting screw 10; a threaded section of one connecting screw 10 is fixed to the first straight segment 22, and a threaded section of the other connecting screw 10 is fixed to the second arc segment. Similarly, the connecting screw 10 is equivalent to a rotating shaft for the connecting plate 3 to rotate. Figure 6As shown, the middle position of the first arc segment 21 is provided with a mounting hole for the smooth section of the positioning screw 9 to pass through; the outer ends of the first straight segment 22 and the first arc segment 21 are provided with mounting holes for the smooth section of the connecting screw 10 to pass through. In this embodiment, "formed on" means that the first straight segment 22 and the first arc segment 21 are integrally formed. Among them, the "outer end" refers to the end facing away from the central axis of the die 7, that is, the end extending from the die seat 11; the "outer convex side" refers to the side facing away from the central axis of the die 7.

[0032] The second star-shaped bracket has the same structure as the first star-shaped bracket 2, including a second arc segment and a second straight segment, the second straight segment is formed on the convex side of the second arc segment, one end of the second straight segment away from the second arc segment is connected to the lower surface of the die seat 11 through a tension spring 8; the convex side of the second arc segment is connected to the lower surface of the die seat 11 through a tension spring 8. Specifically, one end of the tension spring 8 is fixed to the second straight segment, and the other end is fixed to the fixing pin 6, and the fixing pin 6 is installed in the pin hole on the lower surface of the die seat 11. Similarly, "formed on" means that the second straight segment and the second arc segment are integrally formed.

[0033] The adjustment bracket 4 includes an adjustment arc segment 41, an adjustment straight segment 42 and an adjustment handle 43. The adjustment straight segment 42 is formed on the outer convex side of the adjustment arc segment 41, and one end of the adjustment straight segment 42 away from the adjustment arc segment 41 is hinged to the outer end of the first arc segment 21 through another connecting plate 3; the adjustment handle 43 is formed on the outer end of the adjustment arc segment 41. Similarly, "formed on" means that the adjustment arc segment 41, the adjustment straight segment 42 and the adjustment handle 43 are integrally formed.

[0034] Among them, the concave side surface of the first arc segment 21, the concave side surface of the second arc segment and the concave side surface of the adjusting arc segment 41 are all facing the central axis direction of the die 7; the first arc segment 21, the second arc segment and the adjusting arc segment 41 form an accommodating space; the central axis of the die 7 passes through the accommodating space.

[0035] The working principle of the manual tapping device:

[0036] Step 1: Place the lower surface of the die seat 11 downward. Figure 4 As shown, the adjusting handle 43 is then held and rotated clockwise, so that the accommodation space enclosed by the first arc segment 21, the second arc segment and the adjusting arc segment 41 is enlarged; during the rotation of the adjusting handle 43, the first arc segment 21 and the second arc segment rotate counterclockwise in conjunction with the adjusting bracket 4, and the stretch spring 8 becomes longer and is in a stretched state. Before the adjusting handle 43 is actuated, the stretch spring 8 is in a natural state or a state with a small amount of stretch (stretched state).

[0037] Step 2: Place the cylindrical strip of the part to be tapped 12 into the accommodating space and the die 7, then release the adjusting handle 43, the first arc segment 21, the second arc segment and the adjusting arc segment 41 all rotate counterclockwise, the tension spring 8 retracts and is in a stretched state, until the first arc segment 21, the second arc segment and the adjusting arc segment 41 all contact the outer circumference of the part to be tapped 12, the adjusting bracket 4, the first star bracket 2 and the second star bracket stop rotating and press the cylindrical strip under the tension of the tension spring 8, thereby completing the pressing and positioning process of the part to be tapped 12, as shown in FIG. Figure 3 In this process, the handle 43 can be adjusted continuously to keep the part 12 to be tapped coaxial with the die 7.

[0038] Step 3: Rotate the die holder 11 by the tapping handle to perform thread processing on the cylindrical strip part, such as Figures 4 and 5 shown.

[0039] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A manual tapping adjustment and positioning mechanism, comprising a die seat, wherein a die is arranged in the die seat, characterized in that: It also includes an adjustment bracket, a first star bracket and a second star bracket which are sequentially rotatably mounted on the lower surface of the die seat and located in the same plane along the circumferential direction of the die seat; The first star-shaped bracket includes a first arc segment; the second star-shaped bracket includes a second arc segment; the adjustment bracket includes an adjustment arc segment; The inner concave side surface of the first arc segment, the inner concave side surface of the second arc segment and the inner concave side surface of the adjusting arc segment are all oriented toward the central axis of the die; the first arc segment, the second arc segment and the adjusting arc segment enclose an accommodation space; the central axis of the die passes through the accommodation space; The outer end of the first arc segment and the outer end of the adjustment bracket, and the convex side surface of the first arc segment and the outer end of the second arc segment are hinged through a connecting plate; the convex side surface of the second arc segment and the lower surface of the die seat are connected through a tension spring; The first star-shaped bracket further comprises a first straight segment, the first straight segment is formed on the outer convex side surface of the first arc segment, and one end of the first straight segment away from the first arc segment is hinged to the outer end of the second arc segment through the connecting plate; The second star-shaped bracket further comprises a second straight segment, the second straight segment is formed on the outer convex side surface of the second arc segment, and one end of the second straight segment away from the second arc segment is connected to the lower surface of the die seat through the tension spring; The adjustment bracket also includes an adjustment straight section, which is formed on the convex side of the adjustment arc section. One end of the adjustment straight section is away from the adjustment arc section and is hinged to the outer end of the first arc section through the connecting plate.

2. The manual tapping adjustment and positioning mechanism according to claim 1, characterized in that: The adjustment bracket also includes an adjustment handle, which is formed at the outer end of the adjustment arc segment.

3. The manual tapping adjustment and positioning mechanism according to claim 1, characterized in that: The adjusting bracket, the first star-shaped bracket and the second star-shaped bracket are arranged in a clockwise direction.

4. A manual tapping device, comprising the manual tapping adjustment and positioning mechanism according to any one of claims 1 to 3, characterized in that: It also includes a tapping handle, which is arranged on the outer circumference of the die seat.

5. A manual tapping method, based on the manual tapping device according to claim 4, It is characterized in that The following steps are involved: Step 1: Place the lower surface of the die seat downward, then hold and rotate the adjustment bracket so that the accommodation space enclosed by the first arc segment, the second arc segment and the adjustment arc segment is increased; during the rotation of the adjustment bracket, the first arc segment and the second arc segment are linked with the adjustment bracket, and the tension spring is in a tensioned state; Step 2: Place the cylindrical strip of the part to be tapped into the accommodating space and the die, then release the adjusting bracket, the first arc segment, the second arc segment and the adjusting arc segment all rotate in the opposite direction, the tension spring retracts and is in a stretched state, until the first arc segment, the second arc segment and the adjusting arc segment all contact the outer circumference of the part to be tapped, the adjusting bracket, the first star bracket and the second star bracket stop rotating, and the pressing and positioning process of the part to be tapped is completed; Step 3: Use the tapping handle to turn the die holder to perform thread processing on the cylindrical strip part.

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