Automatic thread rolling machining mechanism for reinforcing steel bars

Abstract

The invention provides an automatic thread rolling machining mechanism for reinforcing steel bars. A tool adjusting curve is arranged on the inner wall of a thread rolling tool apron adjusting disc; the tool apron adjusting power assembly is installed on one side of the thread rolling tool apron adjusting disc and used for driving the thread rolling tool apron adjusting disc to rotate. The thread rolling cutter head seat is mounted in the thread rolling cutter head adjusting disc and can relatively slide back and forth relative to the thread rolling cutter head adjusting disc; at least two thread rolling wheels are arranged on the thread rolling cutter holder, are mounted on the thread rolling cutter holder and can move along the radial direction of the thread rolling cutter holder; the tail end of the thread rolling tool apron is in contact with a tool adjusting curve of the thread rolling tool apron adjusting disc, and along with rotation of the thread rolling tool apron adjusting disc, position and size adjustment of the thread rolling wheel and specification replacement of the thread rolling wheel are completed. The thread rolling wheels of two specifications are installed on the same cutter head, the tool apron is driven by the adjusting power assembly, the thread rolling tool apron is driven by the worm and gear assembly to move in the radial direction, and therefore the effects of adjusting the thread rolling size and replacing the roller specification are achieved. Wherein thread rolling wheel adjustment and thread rolling wheel replacement are both servo adjustment, and the machining effect and the machining stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar straight thread processing equipment, and in particular to an automatic steel bar thread rolling processing mechanism. Background Art

[0002] At present, when processing different steel bar sizes and steel bar positive and negative wires on the market, it is necessary to manually adjust the position of the thread rolling wheel and manually change the thread rolling wheel specifications; and the thread rolling wheel replacement mechanism in the existing technology is complicated and the replacement time is long. After replacement, the thread rolling size is unstable, and it is difficult to ensure the consistency of the size after thread rolling.

[0003] After searching, the Chinese patent application number CN113926965A discloses a new type of external thread full expansion thread rolling machine head and its attached device, which uses an involute adjustment method through a thread rolling positioning disk to adjust the diameter, and prints scale lines on the surface of the thread rolling positioning disk, which is convenient and quick to adjust, and the size can be adjusted linearly to ensure the dimensional integrity. However, it cannot realize the function of automatically switching the thread rolling wheel position for positive and negative thread processing.

[0004] After searching, the Chinese patent application number CN217990969U discloses a high-precision tool for processing nuts of a multi-die ball screw pair, and introduces changing the position of thread rolling cutters of different specifications by rotating a rotating disk, thereby achieving the replacement of thread rolling cutter specifications. However, the setting and replacement process of the rotating disk and thread rolling cutter are relatively cumbersome, which affects the processing speed.

[0005] After searching, the Chinese patent application number CN201848678U discloses a steel bar thread rolling machine, which mentions 180-degree rotation of the thread rolling to achieve positive and negative thread processing. Similarly, its design structure and operation process are relatively complicated, affecting the processing speed. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide an automatic steel bar thread rolling processing mechanism.

[0007] According to one aspect of the present invention, there is provided a steel bar automatic thread rolling processing mechanism, comprising:

[0008] A thread rolling cutter seat adjusting disk, wherein the inner wall of the thread rolling cutter seat adjusting disk is provided with a cutter adjusting curve;

[0009] A cutter seat adjustment power assembly, the cutter seat adjustment power assembly is installed on one side of the thread rolling cutter seat adjustment disk, and is used to drive the thread rolling cutter seat adjustment disk to rotate;

[0010] The thread rolling cutter disc seat is installed inside the thread rolling cutter disc adjustment disc and can slide back and forth relative to each other;

[0011] A thread rolling cutter seat, wherein the thread rolling wheel on the thread rolling cutter seat has at least two specifications and is installed on the thread rolling cutter disc seat and can move radially thereof; the end of the thread rolling cutter seat contacts the adjusting curve of the thread rolling cutter seat adjusting disk, and as the thread rolling cutter seat adjusting disk rotates, the position and size of the thread rolling wheel are adjusted and the specifications of the thread rolling wheel are changed.

[0012] Preferably, the thread rolling cutter seat adjusting disk comprises:

[0013] The worm gear cutter adjustment disc is a tubular structure, and a cutter adjustment curve is arranged on its inner wall. The cutter adjustment curve includes three parts, namely, a thread rolling cutter seat avoidance arc section, a thread rolling cutter seat specification rapid switching curve section, and a thread rolling cutter seat size position adjustment curve section;

[0014] A sliding sleeve, which is sleeved on the outer circumference of the worm gear cutter disc and fixes it;

[0015] A worm is installed in the sliding sleeve and cooperates with the worm wheel cutter disc.

[0016] Preferably, the tool holder adjustment power assembly comprises:

[0017] An external hexagonal adjustment seat, the external hexagonal adjustment seat is used for docking the worm;

[0018] A rotation adjustment power assembly, the rotation adjustment power assembly comprising a servo motor and a PLC controller, for controlling the rotation of the external hexagonal adjustment seat;

[0019] The upper and lower docking cylinder assembly comprises a servo motor and a PLC controller, which are used to control the up and down movement of the external hexagonal adjustment seat to achieve docking and separation with the worm.

[0020] Preferably, the thread rolling cutter seat comprises:

[0021] The cutter disc seat is an annular structure, and a plurality of semicircular grooves for counterweight and matching worm are arranged on its edge, a T-shaped slide groove is provided between each adjacent groove, and a plurality of thread rolling cutter seats are respectively inserted into the T-shaped slide grooves and are evenly distributed on the cutter disc seat in an annular shape;

[0022] A return spring, wherein the two return springs are respectively arranged on both sides of the thread rolling cutter seat.

[0023] Preferably, both sides of the bottom of the knife seat disc are respectively provided with round rods protruding outwards; one end of the reset spring is a fixed end and is fixed to the surface of the knife seat, and the other end is a telescopic end and is connected to the round rod.

[0024] Preferably, the thread rolling cutter seat has a function of adjusting the positive and negative thread rolling positions, and its structure includes:

[0025] The knife seat is a block-shaped structure with a U-shaped opening at one end and a pin hole on the surface of the U-shaped opening;

[0026] A thread rolling wheel, wherein the thread rolling wheel is located in the U-shaped opening;

[0027] A roller mounting shaft, the roller mounting shaft passing through the thread rolling wheel and the U-shaped opening; a positive and negative thread adjustment mechanism is provided between the roller mounting shaft and the U-shaped opening;

[0028] A positive and negative thread adjustment seat, the positive and negative thread adjustment seat is installed at one end of the roller mounting shaft; the positive and negative thread adjustment seat and the knife seat are fixed by inserting a pin into the pin hole;

[0029] A return spring is installed between the forward and reverse thread adjustment seat and the knife seat.

[0030] Preferably, the positive and negative wire adjustment mechanism comprises:

[0031] A first adjustment concave surface, the first adjustment concave surface is located on the front surface of the U-shaped opening and is vertically symmetrically distributed on both sides of the roller mounting axis in the vertical direction;

[0032] A second adjustment concave surface, the second adjustment concave surface is located on the rear surface of the U-shaped opening and is horizontally symmetrically distributed on both sides of the roller mounting axis in the horizontal direction;

[0033] A first adjustment shoulder, the first adjustment shoulder is located at the outer periphery of the middle section of the roller mounting shaft, and its shape is adapted to fit with the first adjustment concave surface;

[0034] A second adjustment shoulder, the second adjustment shoulder is located at the outer periphery of the end of the roller mounting shaft, and its shape is adapted to fit with the second adjustment concave surface;

[0035] By rotating the roller mounting shaft, one of the first adjustment shoulder and the second adjustment shoulder is engaged in the corresponding first adjustment concave surface or the second adjustment concave surface, and the axial position of the thread rolling wheel in the U-shaped opening is adjusted to achieve the adjustment of the positive and negative thread rolling positions.

[0036] Preferably, the thickness of the first adjusting concave surface and the second adjusting concave surface is equal to the positive and negative thread rolling distance.

[0037] Preferably, the thread rolling cutter seat comprises two specifications, and the thread rolling cutter seats of the two specifications are spaced apart from each other and installed at the cutter disc seat.

[0038] Preferably, the thread rolling cutter seat adjusting disc has a rapid cutter retraction function, and its structure includes a blocking member arranged behind the worm gear cutter adjusting disc;

[0039] The sliding sleeve slides backward and is limited by the blocking member, and the worm gear cutter disc moves backward accordingly and disengages from the thread rolling cutter seat. Under the action of the return spring, the thread rolling cutter seat moves radially outward until the cutter curve is concave to the maximum amplitude, thereby completing the retracting action of the thread rolling cutter seat.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] In an embodiment of the present invention, an automatic steel bar thread rolling processing mechanism is provided, wherein two thread rolling wheels of different specifications are installed on the same cutter disc, which is driven by a cutter seat adjustment power assembly, and the thread rolling cutter seat is driven to move radially through a worm gear assembly, thereby achieving the effect of adjusting the thread rolling size and replacing the wheel specifications. Among them, the thread rolling wheel adjustment and the thread rolling wheel replacement are both servo adjustments, which improves the processing effect and processing stability.

[0042] In an embodiment of the present invention, an automatic steel bar thread rolling processing mechanism can process the forward and reverse threads of the steel bar by only adjusting the mechanism on the thread rolling wheel cutter seat to achieve the axial displacement of the thread rolling wheel, thereby realizing the forward and reverse thread wheel adjustment action.

[0043] In an automatic steel bar thread rolling mechanism according to an embodiment of the present invention, after the steel bar thread rolling process is completed, the thread rolling wheel can be quickly retracted, thereby improving the retraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0045] Figure 1 It is a structural schematic diagram of an automatic steel bar thread rolling processing mechanism in one embodiment of the present invention;

[0046] Figure 2 It is a structural schematic diagram of the adjusting disk of the thread rolling cutter seat in a preferred embodiment of the present invention;

[0047] Figure 3 It is a schematic diagram of the tool adjustment curve structure in a preferred embodiment of the present invention;

[0048] Figure 4 It is a structural schematic diagram of a thread rolling cutter seat in a preferred embodiment of the present invention, FIG. a is a cross-sectional view, and FIG. b is a stereoscopic view;

[0049] Figure 5 Schematic diagram of a positive and negative thread adjustment mechanism of a thread rolling cutter seat in a preferred embodiment of the present invention, a and b are three-dimensional diagrams at different angles respectively;

[0050] Figure 6 It is a structural schematic diagram of a knife holder adjusting power assembly in a preferred embodiment of the present invention;

[0051] Figure 7 A schematic diagram of adjusting the thread rolling cutter seat in a preferred embodiment of the present invention;

[0052] Figure 8 It is a schematic diagram of the thread rolling cutter seat retracting mechanism in a preferred embodiment of the present invention.

[0053] In the figure, 1-thread rolling cutter seat adjustment disk, 2-cutter seat adjustment power assembly, 3-thread rolling cutter seat, 4-thread rolling cutter seat; 10-cutter adjustment curve, 101-avoidance arc section, 102-thread rolling cutter seat specification quick switching curve section, 103-thread rolling cutter seat size position adjustment curve section, 11-worm gear cutter adjustment disk, 12-sliding sleeve, 13-worm; 21-external hexagonal adjustment seat, 22-rotation adjustment power assembly 22, 23-upper and lower docking cylinder assembly; 31-cutter seat, 32-reset spring; 41-cutter seat, 42-thread rolling wheel mounting shaft, 43 thread rolling wheel, 44-positive and negative thread adjustment seat, 45-reset spring; pin-441, pin hole-442, first adjustment concave surface-401, second adjustment concave surface-402, first adjustment shoulder-403, second adjustment shoulder-404. DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0055] In a preferred embodiment of the present invention, a steel bar automatic thread rolling processing mechanism is provided. Figure 1 , including a thread rolling cutter seat adjustment disk 1, a cutter seat adjustment power assembly 2, a thread rolling cutter seat 3 and a thread rolling cutter seat 4. The inner wall of the thread rolling cutter seat adjustment disk 1 is provided with a cutter adjustment curve 11; the cutter seat adjustment power assembly 2 is installed on one side of the thread rolling cutter seat adjustment disk 1, and is used to drive the thread rolling cutter seat adjustment disk 1 to rotate; the thread rolling cutter seat 3 is installed inside the thread rolling cutter seat adjustment disk 1, and can slide relative to each other back and forth; the thread rolling wheel specifications on the thread rolling cutter seat 4 are at least two, and are installed on the thread rolling cutter seat 3 and can move along its radial direction; the end of the thread rolling cutter seat 4 contacts the cutter adjustment curve 11 of the thread rolling cutter seat adjustment disk 1, and with the rotation of the thread rolling cutter seat adjustment disk 1, the thread rolling wheel position size adjustment and thread rolling wheel specification replacement are completed.

[0056] In this embodiment, two different specifications of thread rolling wheels are installed on the same cutter disc, which are driven by the cutter seat adjustment power assembly, and the thread rolling cutter seat is driven to move radially through the worm gear assembly, so as to achieve the effect of adjusting the thread rolling size and changing the roller specifications. Among them, the adjustment and replacement of the thread rolling wheel are both servo adjustments, which improves the processing effect and processing stability.

[0057] In a preferred embodiment of the present invention, a preferred structure of the thread rolling cutter seat adjusting disk 1 is provided. Figure 2 Specifically, it includes a worm gear cutter disc 11, a sliding sleeve 12 and a worm 13. The worm gear cutter disc 11 is a tubular structure, and a cutter curve 10 is arranged on its inner wall. The cutter curve 10 includes three parts, see Figure 3 , respectively, the thread rolling cutter seat avoidance arc section 101, the thread rolling cutter seat specification rapid switching curve section 102, and the thread rolling cutter seat size position adjustment curve section 103. The sliding sleeve 12 is arranged on the outside of the worm gear cutter disc 1; the worm 13 is installed in the sliding sleeve 12 and cooperates with the worm gear cutter disc 11.

[0058] In a preferred embodiment of the present invention, a preferred structure of the tool holder adjustment power assembly 2 is provided. Figure 6 Specifically, it includes an outer hexagonal adjustment seat 21, a rotation adjustment power assembly 22, and an upper and lower docking cylinder assembly 23. The outer hexagonal adjustment seat 21 is used to dock with the worm 13; the rotation adjustment power assembly 22 includes a servo motor and a PLC controller, which are used to control the rotation of the outer hexagonal adjustment seat 21; the upper and lower docking cylinder assembly 13 includes a servo motor and a PLC controller, which are used to control the outer hexagonal adjustment seat 21 to move up and down, so as to achieve docking and separation with the worm 13.

[0059] In a preferred embodiment of the present invention, a preferred structure of the thread rolling cutter seat 3 is provided. Figure 1 , Figure 2 and Figure 7 Specifically, it includes a cutter seat 31 and a return spring 32. The cutter seat 31 is an annular structure, and a plurality of semicircular grooves are arranged on its edge; the thread rolling cutter seat 4 is evenly distributed on the cutter seat 31 in an annular shape along the radial direction; and two return springs 32 are respectively arranged on both sides of the thread rolling cutter seat 4.

[0060] Furthermore, two sizes of thread rolling cutter seats 4 surround the cutter disc seat 31 and are arranged at intervals along its radial direction. Specifically, the outer ring of the cutter disc seat 31 is provided with a plurality of T-shaped slots along its radial direction, and the thread rolling cutter seat 4 is inserted into the T-shaped slots to achieve connection with the cutter disc seat 31 and radial relative movement.

[0061] The structure in the above embodiment can realize automatic adjustment of the position of the thread rolling wheel, that is, the size and position of the thread rolling wheel can be automatically adjusted to realize automatic thread rolling processing of steel bars of different specifications; it can also realize automatic switching of thread rolling wheels of various specifications. The specific implementation process is as follows:

[0062] The upper and lower docking cylinder components 23 contract and drive the outer hexagonal adjustment seat 21 to move downward, so that the outer hexagonal adjustment seat 21 docks with the worm 13 on the thread rolling cutter seat adjustment disk 1; the servo motor of the rotation adjustment power component 22 rotates, driving the worm 13 to rotate, and the worm 13 and the worm gear adjustment disk 11 rotate, and the two specifications of 42 and the thread rolling cutter seat 3 move radially, completing the position and size adjustment of the thread rolling wheel 23 and the specification replacement of the thread rolling wheel 23.

[0063] After the size adjustment or specification change of the thread rolling wheel is completed, the upper and lower docking cylinder assemblies 23 are pneumatically extended to drive the outer hexagonal adjustment seat 21 to move upward, so that the outer hexagonal adjustment seat 21 is separated from the worm 13.

[0064] In a preferred embodiment of the present invention, a preferred structure for automatically switching the position of the thread rolling wheel for positive and negative thread processing is provided, that is, the position of the thread rolling wheel is automatically switched to realize positive and negative thread rolling processing of steel bars. Specifically, the structure is arranged at the thread rolling cutter seat 4, see Figure 3 Specifically, it includes a knife seat 41, a thread rolling wheel mounting shaft 42, a thread rolling wheel 43, a positive and negative thread adjustment seat 44 and a reset spring 45.

[0065] The knife seat 41 is a block-shaped structure, which is arranged along the radial direction of the knife seat 31. One end of the knife block 41 close to the axis of the knife seat 31 is provided with a U-shaped opening for setting the thread rolling wheel 43, and the other end is used to insert into the T-shaped slide groove of the knife seat 31. In addition, round rods are also provided on both sides of the knife block 41, and the round rods are used in conjunction with the reset spring 32.

[0066] The thread rolling wheel installation shaft 42 passes through the U-shaped opening and the thread rolling wheel, and its front end is locked by a positive and negative thread adjustment seat 44 (locking is achieved by a pin and a pin hole). A reset spring 45 is arranged inside the positive and negative thread adjustment seat 44.

[0067] See also Figure 4 and Figure 5 A positive and negative thread adjustment mechanism is provided at the U-shaped opening of the thread rolling wheel mounting shaft 42 and the knife seat 41, and the mechanism includes two adjustment concave surfaces and two adjustment shoulders, namely a first adjustment concave surface 401 and a second adjustment concave surface 402, a first adjustment shoulder 403 and a second adjustment shoulder 404; the first adjustment concave surface 401 is located on the front surface of the U-shaped opening, and is vertically symmetrically distributed on both sides of the vertical direction of the roller mounting shaft 42; the second adjustment concave surface 402 is located on the rear surface of the U-shaped opening, and is horizontally symmetrically distributed on both sides of the horizontal direction of the roller mounting shaft 42; the first adjustment shoulder 403 is located on the outer periphery of the middle section of the roller mounting shaft 42, and its shape is adapted to fit with the first adjustment concave surface 401; the second adjustment shoulder 404 is located on the outer periphery of the end of the roller mounting shaft 42, and its shape is adapted to fit with the second adjustment concave surface 402;

[0068] By rotating the roller mounting shaft 42, one of the first adjustment shoulder 403 and the second adjustment shoulder 404 is engaged in the corresponding first adjustment concave surface 401 or the second adjustment concave surface 402, and the axial position of the thread rolling wheel 43 in the U-shaped opening is adjusted to achieve the adjustment of the positive and negative thread rolling position. In this embodiment, the thickness of the first adjustment concave surface and the second adjustment concave surface is equal to the positive and negative thread rolling spacing.

[0069] Furthermore, assuming that the previous process is positive wire processing, the second adjustment shoulder is located inside the second adjustment concave surface, and the first adjustment shoulder is located outside the first adjustment concave surface; now it needs to be adjusted to reverse wire processing, and the adjustment steps are as follows:

[0070] Clamp the positive and negative thread adjustment seat 44 and pull it outward to disengage the pin 441 from the pin hole 442;

[0071] Rotate the thread rolling wheel installation shaft 42 clockwise to make the first adjustment shoulder 403 of the thread rolling wheel installation shaft 42 fit with the first adjustment concave surface 401 (at this time, the second adjustment shoulder 404 is located outside the second adjustment concave surface 402);

[0072] The positive and negative thread adjustment seat 44 is loosened, and the pin 441 is inserted into the pin hole 442 by means of the return spring 45 to complete the axial position adjustment of the thread rolling wheel 43.

[0073] If the rolling wheel 43 needs to be adjusted in the reverse direction, all the actions are reversed.

[0074] In a preferred embodiment of the present invention, a preferred structure for automatic and rapid retraction of a thread rolling wheel is provided. Figure 2 and Figure 8 , a protruding blocking member 113 is provided behind the worm gear cutter disc 11;

[0075] The sliding sleeve 13 slides backward and is limited by the blocking member 113, and the worm gear cutter disc 11 moves backward accordingly and disengages from the thread rolling cutter seat 3. Under the action of the reset spring 32, the thread rolling cutter seat 3 moves radially outward until the cutter curve 10 is concave to the maximum amplitude, completing the retracting action of the thread rolling cutter seat.

[0076] The above embodiment overcomes the defects in the prior art. On the one hand, the size and position of the thread rolling wheel can be automatically adjusted. On the other hand, it can be compatible with thread rolling wheels of various specifications and can realize automatic switching of thread rolling wheel specifications. Moreover, a clever design is adopted to automatically switch the position of the thread rolling wheel to realize the positive and negative thread rolling processing of the steel bar. After the steel bar thread rolling processing is completed, the thread rolling wheel can be quickly retracted to realize the function of rapid thread rolling retraction, which contributes to improving the production and processing efficiency.

[0077] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A steel bar automatic thread rolling processing mechanism, characterized in that: include: A thread rolling cutter seat adjusting disk, wherein the inner wall of the thread rolling cutter seat adjusting disk is provided with a cutter adjusting curve; A cutter seat adjustment power assembly, the cutter seat adjustment power assembly is installed on one side of the thread rolling cutter seat adjustment disk, and is used to drive the thread rolling cutter seat adjustment disk to rotate; The thread rolling cutter disc seat is installed inside the thread rolling cutter disc adjustment disc and can slide back and forth relative to each other; A thread rolling cutter seat, wherein the thread rolling wheel on the thread rolling cutter seat has at least two specifications and is installed on the thread rolling cutter disc seat and can move radially thereof; the end of the thread rolling cutter seat contacts the adjusting curve of the thread rolling cutter seat adjusting disk, and as the thread rolling cutter seat adjusting disk rotates, the position and size of the thread rolling wheel are adjusted and the specifications of the thread rolling wheel are changed.

2. The automatic steel bar thread rolling processing mechanism according to claim 1, characterized in that: The thread rolling cutter seat adjusting disk comprises: The worm gear cutter adjustment disc is a tubular structure, and a cutter adjustment curve is arranged on its inner wall. The cutter adjustment curve includes three parts, namely, a thread rolling cutter seat avoidance arc section, a thread rolling cutter seat specification rapid switching curve section, and a thread rolling cutter seat size position adjustment curve section; A sliding sleeve, which is sleeved on the outer circumference of the worm gear cutter disc and fixes it; A worm is installed in the sliding sleeve and cooperates with the worm wheel cutter disc.

3. The automatic steel bar thread rolling mechanism according to claim 2, characterized in that: The tool holder adjustment power assembly comprises: An external hexagonal adjustment seat, the external hexagonal adjustment seat is used for docking the worm; A rotation adjustment power assembly, the rotation adjustment power assembly comprising a servo motor and a PLC controller, for controlling the rotation of the external hexagonal adjustment seat; The upper and lower docking cylinder assembly comprises a servo motor and a PLC controller, which are used to control the up and down movement of the external hexagonal adjustment seat to achieve docking and separation with the worm.

4. The automatic steel bar thread rolling processing mechanism according to claim 2, characterized in that: The thread rolling cutter disc seat comprises: The cutter disc seat is an annular structure, and a plurality of semicircular grooves for counterweight and matching worm are arranged on its edge, a T-shaped slide groove is provided between each adjacent groove, and a plurality of thread rolling cutter seats are respectively inserted into the T-shaped slide grooves and are evenly distributed on the cutter disc seat in an annular shape; A return spring, wherein the two return springs are respectively arranged on both sides of the thread rolling cutter seat.

5. The automatic steel bar thread rolling mechanism according to claim 4, characterized in that: Round rods protruding outward are respectively provided on both sides of the bottom of the knife seat disc; one end of the reset spring is a fixed end and is fixed to the surface of the knife seat, and the other end is a telescopic end and is connected to the round rod.

6. The automatic steel bar thread rolling mechanism according to claim 1, characterized in that: The thread rolling cutter seat has the function of adjusting the positive and negative thread rolling positions, and its structure includes: The knife seat is a block-shaped structure with a U-shaped opening at one end and a pin hole on the surface of the U-shaped opening; A thread rolling wheel, wherein the thread rolling wheel is located in the U-shaped opening; A roller mounting shaft, the roller mounting shaft passing through the thread rolling wheel and the U-shaped opening; a positive and negative thread adjustment mechanism is provided between the roller mounting shaft and the U-shaped opening; A positive and negative thread adjustment seat, the positive and negative thread adjustment seat is installed at one end of the roller mounting shaft; the positive and negative thread adjustment seat and the knife seat are fixed by inserting a pin into the pin hole; A return spring is installed between the forward and reverse thread adjustment seat and the knife seat.

7. The automatic steel bar thread rolling mechanism according to claim 6, characterized in that: The positive and negative wire adjustment mechanism comprises: A first adjustment concave surface, the first adjustment concave surface is located on the front surface of the U-shaped opening and is vertically symmetrically distributed on both sides of the roller mounting axis in the vertical direction; A second adjustment concave surface, the second adjustment concave surface is located on the rear surface of the U-shaped opening and is horizontally symmetrically distributed on both sides of the roller mounting axis in the horizontal direction; A first adjustment shoulder, the first adjustment shoulder is located at the outer periphery of the middle section of the roller mounting shaft, and its shape is adapted to fit with the first adjustment concave surface; A second adjustment shoulder, the second adjustment shoulder is located at the outer periphery of the end of the roller mounting shaft, and its shape is adapted to fit with the second adjustment concave surface; By rotating the roller mounting shaft, one of the first adjustment shoulder and the second adjustment shoulder is engaged in the corresponding first adjustment concave surface or the second adjustment concave surface, and the axial position of the thread rolling wheel in the U-shaped opening is adjusted to achieve the adjustment of the positive and negative thread rolling positions.

8. The automatic steel bar thread rolling mechanism according to claim 7, characterized in that: The thickness of the first adjusting concave surface and the second adjusting concave surface is equal to the positive and negative thread rolling distance.

9. The automatic steel bar thread rolling mechanism according to claim 1, characterized in that: The thread rolling cutter seat comprises two specifications, and the thread rolling cutter seats of the two specifications are spaced apart from each other and installed on the cutter disc seat.

10. The automatic steel bar thread rolling processing mechanism according to claim 4, characterized in that: The thread rolling cutter seat adjusting disc has a rapid cutter retraction function, and its structure includes a blocking member arranged behind the worm gear cutter adjusting disc; The sliding sleeve slides backward and is limited by the blocking member, and the worm gear cutter disc moves backward accordingly and disengages from the thread rolling cutter seat. Under the action of the return spring, the thread rolling cutter seat moves radially outward until the cutter curve is concave to the maximum amplitude, thereby completing the retracting action of the thread rolling cutter seat.

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