Valve rod thread rolling equipment

Abstract

The invention discloses valve rod thread rolling equipment which comprises a base and two thread rolling wheels arranged on the base and capable of rotating, and further comprises a synchronous inclining assembly arranged on the base and used for enabling the two thread rolling wheels to incline towards different directions synchronously; the quantitative inclination assembly is arranged on the synchronous inclination assembly so as to synchronously adjust the inclination angles of the two thread rolling wheels; the supporting and collecting assembly is arranged on the synchronous inclining assembly and used for supporting the valve rod needing thread rolling; and the pressure detection assembly is arranged on the base and used for adjusting the length of the rolled thread of the valve rod. Compared with the prior art, the thread rolling device has the advantages that the two thread rolling wheels can be rotated at the same time, on one hand, the efficiency is higher, on the other hand, the rotating inclination angles of the two thread rolling wheels are the same, and the situation that the thread rolling effect is poor due to the fact that the rotating inclination angles of the thread rolling wheels are different is avoided.

Description

Technical Field

[0001] The invention relates to the field of thread rolling, in particular to a valve stem thread rolling device. Background Art

[0002] There are many types of valve stems, and thread rolling is required to fix them. In different scenarios, the thread lengths for thread rolling on different valve stems are different. When a shorter length of thread rolling is required, the two thread rolling wheels are generally placed horizontally. At this time, when the valve stem is placed on the thread rolling wheel, the valve stem will not move horizontally, and will only be rolled according to the placement position. If a longer length of thread rolling is required, that is, the length of the thread rolling needs to be longer than the length of the thread rolling wheel, then the two thread rolling wheels need to be tilted. During thread rolling, the valve stem will slide horizontally for thread rolling. In addition, the inclination angle of the two thread rolling wheels on the thread rolling machine can be adjusted according to the different valve stem thread pitches and thread types. However, at present, when adjusting the inclination angle of the two thread rolling wheels, the two thread rolling wheels are manually adjusted to adjust the angle of the thread rolling wheels, and the thread rolling wheels cannot be rotated at the same angle with high precision at the same time, resulting in poor thread rolling accuracy. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above technical problems and provide a valve stem thread rolling device capable of adjusting the inclination angles of two thread rolling wheels at the same angle at the same time.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a valve stem thread rolling equipment, including a base and two thread rolling wheels that can rotate on the base, and also including: a synchronous tilting component, which is arranged on the base and is used to make the two thread rolling wheels tilt synchronously in different directions; a quantitative tilting component, which is arranged on the synchronous tilting component to synchronously adjust the tilt angles of the two thread rolling wheels; a support and collection component, which is arranged on the synchronous tilting component and is used to support the valve stem that needs to be rolled; a pressure detection component, which is arranged on the base and is used to adjust the length of the valve stem thread rolling.

[0005] Furthermore, the synchronous tilting assembly includes: a sliding assembly, a rotating assembly and a thread rolling assembly. The sliding assembly is arranged on a base, and the sliding assembly is connected to the thread rolling assembly through the rotating assembly.

[0006] Furthermore, the sliding assembly includes two support plates symmetrically arranged on the base, a sliding column 1 fixedly arranged between the two support plates 1, and a screw rod rotatably arranged between the two support plates 1, wherein a driving motor 1 is connected to the outer side of one of the support plates 1, and the output end of the driving motor 1 rotates through one of the support plates 1 and is connected to the screw rod, and the outer sliding sleeve of the sliding column 1 is provided with two sliding plates mounted on the outer side of the screw rod through threaded matching, and the thread directions at both ends of the screw rod are opposite.

[0007] Furthermore, the rotating assembly is provided in two numbers and respectively arranged on two sliding plates, the rotating assembly includes a telescopic rod, the telescopic lower end of which is hinged to the sliding plate through a hinge seat, the other end of the telescopic rod is hinged to the thread rolling assembly, the sliding plate is a triangular frame structure, and the sliding plate is provided with a through hole which is sleeved on the outside of the telescopic rod.

[0008] Furthermore, the telescopic rod includes a cylinder, a sliding rod and a piston. One end of the sliding rod is connected to the piston. The piston slides in the cylinder. The lower end of the cylinder is hinged to the sliding plate through a hinge seat.

[0009] Furthermore, the thread rolling assembly includes an adjusting tube, the lower sides of both ends of the adjusting tube are connected to a first L-shaped tube via a rotating joint, the other end of the first L-shaped tube is connected to a second L-shaped tube via a rotating joint, the other end of the second L-shaped tube is connected to an arc tube passing through a support plate 1 via a rotating joint, the arc tube passes through a hinge seat via a rotating joint and is connected to the cylinder, and the side of a piston 1 in the cylinder close to a sliding rod 1, the arc tube, the second L-shaped tube, the first L-shaped tube and the adjusting tube are all filled with hydraulic oil.

[0010] Further, the quantitative tilting assembly includes a piston two, a sliding rod two and a frame body one, a piston two is slidably provided in the adjusting tube, one end of the piston two is connected with a sliding rod two that slides through one end of the adjusting tube, a frame body one is fixedly provided on the outer side of the sliding column one, the adjusting tube is fixed to the lower side of the frame body one, one end of the frame body one is connected with an electric push rod one through a fixing rod, the output end of the electric push rod one is connected to the sliding rod two, the sliding rod two is connected with a metal contact piece one, a plurality of sliding columns two are evenly penetrated on the fixing rod, a limit block is connected with the end of the sliding column two away from the metal contact piece one, a permanent magnet is connected with the other end of the sliding column two, a metal contact piece two that can resist the metal contact piece one is embedded in the permanent magnet, the metal contact piece one can be attracted by the permanent magnet, and a spring is sleeved on the outer side of the sliding column two that is respectively connected to the limit block and the fixing rod.

[0011] Furthermore, the thread rolling assembly includes rotating plates respectively hinged on the sliding plates, two support plates 2 fixedly arranged symmetrically on the rotating plates, and the thread rolling wheel rotatably arranged in the two support plates 2, one side of the support plate 1 is connected to a drive motor 2, and the output end of the drive motor 2 rotates through one of the support plates 2 and is connected to the thread rolling wheel.

[0012] Furthermore, the support and collection assembly includes a support plate three connected to the frame one, a collection box connected to the support plate three, and an electric push rod two fixed on the upper side of the collection box, the output end of the electric push rod two is connected to the frame two, and a plurality of positioning wheels are rotatably arranged inside the frame two.

[0013] Furthermore, the pressure detection assembly includes two support rods connected to the base, a sliding column three fixed on one side of the support rod and an extrusion plate slidably sleeved on the outside of the sliding column three, one side of the extrusion plate is connected to a limit box, the outer side of the sliding column three is sleeved with a spring, the end of the spring away from the extrusion plate is connected to an extrusion ring, one end of the sliding column three is connected to a fixed plate, and the fixed plate is connected to a pressure sensor that abuts against the extrusion ring.

[0014] The advantages of the present invention compared with the prior art are: The two rolling wheels can be rotated at the same time, which is more efficient on the one hand, and makes the two rolling wheels rotate at the same angle on the other hand, avoiding the situation where the rolling effect is poor due to different rotation angles of the rolling wheels; The length of the thread rolling can be detected by the pressure detection component. After reaching the preset thread rolling length, the thread rolling valve stem can be quickly pushed out to facilitate the adjustment of the thread rolling length according to demand. By controlling the electric push rod 1, the rotation and tilting angles of the two rolling wheels can be easily adjusted according to the needs, without manual control, and the adjustment is more convenient; Currently, hydraulic pipes are mostly used for hydraulic control. However, as the equipment moves, the hydraulic pipes will bend, making it impossible to achieve precise control of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from another viewing angle; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention when the base is removed; Figure 4 It is a schematic diagram of a three-dimensional structure of a support plate of the present invention; Figure 5 It is a structural schematic diagram of one side of the support plate of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the regulating tube of the present invention; Figure 7 It is a schematic diagram of the structure of one side of the regulating tube of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the cylinder of the present invention; Fig. 9 It is a schematic diagram of the structure of the second piston of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the support rod of the present invention; Fig.11 It is a schematic diagram of the enlarged structure of position A of the present invention.

[0016] As shown in the figure: 1. Base; 2. Thread rolling wheel; 3. Synchronous tilting assembly; 4. Quantitative tilting assembly; 5. Support and collection assembly; 6. Pressure detection assembly; 7. Sliding assembly; 8. Rotating assembly; 9. Thread rolling assembly; 10. Pressure sensor; 11. Support plate 1; 12. Sliding column 1; 13. Screw; 14. Drive motor 1; 15. Sliding plate; 16. Telescopic rod; 17. Articulated seat; 18. Cylinder; 19. Sliding rod 1; 20. Piston 1; 21. Adjusting tube; 22. Fixed plate; 23. First L-shaped tube; 24. Second L-shaped Tube; 25, arc tube; 26, piston two; 27, sliding rod two; 28, frame one; 29, extrusion ring; 30, fixed rod; 31, electric push rod one; 32, metal contact piece one; 33, sliding column two; 34, limit block; 35, permanent magnet; 36, metal contact piece two; 37, drive motor two; 38, rotating plate; 39, support plate two; 40, support plate three; 41, collection box; 42, electric push rod two; 43, frame two; 44, positioning wheel; 45, support rod; 46, sliding column three; 47, extrusion plate; 48, limit box.

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0019] Please see attached Figure 1-11A valve stem thread rolling device comprises a base 1 and two thread rolling wheels 2 rotatable on the base 1, and also comprises: a synchronous tilting component 3, arranged on the base 1, for making the two thread rolling wheels 2 synchronously tilt in different directions; a quantitative tilting component 4, arranged on the synchronous tilting component 3, for synchronously adjusting the size of the tilting angle of the two thread rolling wheels 2; a support and collection component 5, arranged on the synchronous tilting component 3, for supporting the valve stem that needs thread rolling; a pressure detection component 6, arranged on the base 1, for adjusting the length of the valve stem thread rolling.

[0020] In some specific embodiments, the synchronous tilting assembly 3 includes: a sliding assembly 7, a rotating assembly 8 and a thread rolling assembly 9. The sliding assembly 7 is arranged on the base 1, and the sliding assembly 7 is connected to the thread rolling assembly 9 through the rotating assembly 8.

[0021] In some specific embodiments, the sliding assembly 7 includes two support plates 11 symmetrically arranged on the base 1, a sliding column 12 fixedly arranged between the two support plates 11, and a screw 13 rotatably arranged between the two support plates 11, wherein the outer side of one of the support plates 11 is connected to a driving motor 14, and the output end of the driving motor 14 rotates through one of the support plates 11 and is connected to the screw 13, and the outer sliding sleeve of the sliding column 12 is provided with two sliding plates 15 which are sleeved on the outer side of the screw 13 through threaded matching, and the thread directions of the two ends of the screw 13 are opposite.

[0022] In some specific embodiments, the rotating assembly 8 is set in two and is respectively arranged on two sliding plates 15. The rotating assembly 8 includes a telescopic rod 16. The lower end of the telescopic rod 16 is hinged to the sliding plate 15 through a hinge seat 17. The other end of the telescopic rod 16 is hinged to the thread rolling assembly 9. The sliding plate 15 is a triangular frame structure, and the sliding plate 15 is provided with a through hole that is sleeved on the outside of the telescopic rod 16.

[0023] In some specific embodiments, the telescopic rod 16 includes a cylinder 18, a sliding rod 19 and a piston 20, one end of the sliding rod 19 is connected to the piston 20, the piston 20 slides in the cylinder 18, and the lower end of the cylinder 18 is hinged to the sliding plate 15 through a hinge seat 17.

[0024] In some specific embodiments, the thread rolling assembly 9 includes an adjusting tube 21, the lower sides of both ends of the adjusting tube 21 are connected to a first L-shaped tube 23 through a rotating joint, the other end of the first L-shaped tube 23 is connected to a second L-shaped tube 24 through a rotating joint, the other end of the second L-shaped tube 24 is connected to an arc tube 25 that passes through the support plate 11 through a rotating joint, the arc tube 25 passes through the hinge seat 17 through a rotating joint and is connected to the cylinder 18, and the side of the piston 20 in the cylinder 18 close to the sliding rod 19, the arc tube 25, the second L-shaped tube 24, the first L-shaped tube 23 and the adjusting tube 21 are all filled with hydraulic oil.

[0025] In some specific embodiments, the quantitative tilting assembly 4 includes a piston 26, a sliding rod 27 and a frame 28. The piston 26 is slidably provided in the regulating tube 21, and one end of the piston 26 is connected with a sliding rod 27 that slides through one end of the regulating tube 21. The outer side of the sliding column 12 is fixed with a frame 28. The regulating tube 21 is fixed to the lower side of the frame 28. One end of the frame 28 is connected with an electric push rod 31 through a fixing rod 30. The output end of the electric push rod 31 is connected to the sliding rod 27. The sliding rod 27 is connected to a metal contact piece 32, and the fixed rod 30 is evenly penetrated by a plurality of sliding columns 33. One end of the sliding column 33 away from the metal contact piece 32 is connected to a limit block 34, and the other end of the sliding column 33 is connected to a permanent magnet 35. The permanent magnet 35 is embedded with a metal contact piece 36 that can resist the metal contact piece 32. The metal contact piece 32 can be attracted by the permanent magnet 35. The outer side of the sliding column 33 is provided with a spring that is respectively connected to the limit block 34 and the fixed rod 30.

[0026] In some specific embodiments, the thread rolling assembly 9 includes a rotating plate 38 respectively hinged on the sliding plate 15, two support plates 39 symmetrically arranged and fixed on the rotating plate 38, and the thread rolling wheel 2 rotatably arranged in the two support plates 39, and a drive motor 37 is connected to one side of the support plate 11, and the output end of the drive motor 37 rotates through one of the support plates 39 and is connected to the thread rolling wheel 2.

[0027] In some specific embodiments, the support and collection assembly 5 includes a support plate three 40 connected to the frame one 28, a collection box 41 connected to the support plate three 40, and an electric push rod two 42 fixed on the upper side of the collection box 41, the output end of the electric push rod two 42 is connected to a frame two 43, and a plurality of positioning wheels 44 are rotatably provided inside the frame two 43.

[0028] In some specific embodiments, the pressure detection assembly 6 includes two support rods 45 connected to the base 1, a sliding column three 46 fixed on one side of the support rod 45, and an extrusion plate 47 slidably sleeved on the outside of the sliding column three 46, one side of the extrusion plate 47 is connected to a limit box 48, the outer side of the sliding column three 46 is sleeved with a spring, the end of the spring away from the extrusion plate 47 is connected to an extrusion ring 29, one end of the sliding column three 46 is connected to a fixed plate 22, and the fixed plate 22 is connected to a pressure sensor 10 that abuts against the extrusion ring 29.

[0029] In some specific embodiments, a controller (not shown in the figure) is also provided, and the pressure sensor 10, the drive motor 14, the drive motor 2 37, the metal contact piece 1 32, the metal contact piece 2 36, the electric push rod 1 31 and the electric push rod 2 42 are electrically connected.

[0030] The working principle and use process of the present invention: Embodiment 1, when it is necessary to roll the thread on a shorter length of the valve stem, it is not necessary to tilt the rolling wheel 2, but only need to place the rolling wheel 2 horizontally, and the two rolling wheels 2 are driven to rotate by turning on the drive motor 2 37, and the frame 2 43 is controlled to rise and fall by the electric push rod 2 42, and then the positioning wheel 44 is adjusted to a suitable position, and the valve stem that needs to be rolled is placed on the positioning wheel 44, and the position of the valve stem that needs to be rolled is placed between the two rolling wheels 2, and the screw 13 is driven to rotate by turning on the drive motor 1 14, and then the two sliding plates 15 are driven to slide steadily towards each other on the outside of the sliding column 12 at the same time, and then the valve stem is rolled. After the rolling is completed, the two rolling wheels 2 are separated to facilitate the removal of the valve stem after the rolling. In addition, the collection box can collect some debris generated by the rolling.

[0031] Embodiment 2, when the valve stem that needs to be thread rolled needs to be thread rolled for a longer distance, that is, the length of the thread rolling is greater than the width of the thread rolling wheel 2, at this time, the thread rolling wheel 2 needs to be tilted, and the electric push rod 1 31 is controlled to push the sliding rod 27, so that the piston 26 slides in the adjusting tube 21, and the hydraulic oil flows in the adjusting tube 21. When the piston 26 slides to one side, the hydraulic oil on one side of the piston 26 is pushed into the rotary joint, the first L-shaped tube 23, the rotary joint, the second L-shaped tube 24, the rotary joint, the arc tube 25, and the rotary joint to flow the hydraulic oil into the cylinder 18, and the sliding rod 19 is pushed by the piston 1 20, and then the rotating plate 38 is driven to rotate, and the corresponding thread rolling wheel 2 is tilted in one direction in cooperation with the supporting plate 2 39, and the corresponding , the hydraulic oil on the other side of the piston 26 will extract the hydraulic oil, and in turn pass through the rotary joint, the first L-shaped tube 23, the rotary joint, the second L-shaped tube 24, the rotary joint, the arc tube 25, and the rotary joint to make the hydraulic oil in the cylinder 18 enter and absorb, pull the sliding rod 19, and make the corresponding rotating plate 38 rotate, cooperate with the support plate 2 39 to make the corresponding rolling wheel 2 tilt in another direction, and then make the two rolling wheels 2 tilt and rotate in opposite directions. In the specific implementation, one end of the sliding rod 27 will be closed and pass through the center of the piston 26 until it passes through the other end of the adjusting tube 21, so that when the adjusting piston 26 slides, the hydraulic oil at both ends of the adjusting tube 21 has the same flow rate in the two first L-shaped tubes 23, so as to further realize the synchronous rotation of the two rolling wheels 2.

[0032] Embodiment 3, as the electric push rod 1 31 pushes the sliding rod 27 to slide, the permanent magnet 35 can attract the metal contact piece 1 32, so that the metal contact piece 1 32 and the metal contact piece 2 36 are electrically connected to each other. As the electric push rod 1 31 continues to push, the metal contact piece 1 32 skips over the next metal contact piece 2 36 and attracts the metal contact piece 2 36. At the same time, the last attracted metal contact piece 2 36 is reset by the action of the spring. Whenever the metal contact piece 1 32 and any one of the metal contact pieces 2 36 are against each other, different electrical signals generated will be transmitted to the controller, and then the controller can control the external display to display different numbers. According to the displayed numbers, it is known which metal contact piece 1 32 and which metal contact piece 2 36 are against each other, and then the electric push rod 1 31 is controlled to stop pushing according to the needs, and the position of the piston 2 26 in the adjustment tube 21 is controlled to conveniently adjust the inclination angle of the two rolling wheels 2 according to the needs. During thread rolling, when the two rolling wheels 2 approach or move away from each other, the cylinder 18 rotates relative to the arc tube 25 through the action of the rotary joint, and the second L-shaped tube 24 rotates relative to the arc tube 25 and the first L-shaped tube 23 through the action of the rotary joint. The first L-shaped tube 23 rotates relative to the adjusting tube 21 through the action of the rotary joint. Compared with the prior art where the hydraulic oil pipe is used, the bending of the hydraulic oil pipe when the equipment moves can easily cause a slight movement of the hydraulic oil in the hydraulic oil pipe, causing unnecessary rotation of the rolling wheel 2. As a result, the movement of the hydraulic oil is not affected when the two rolling wheels 2 approach or move away, thereby improving the rotation accuracy of the rolling wheel 2.

[0033] Embodiment 4: During the thread rolling process, the valve stem will push the limit box 48 toward the direction of the limit box 48, thereby driving the extrusion plate 47 to overcome the elastic force of the spring, and then squeeze the pressure sensor 10 through the extrusion ring 29. The generated pressure electrical signal is transmitted to the controller in real time. The controller presets a pressure value that meets the requirements. Under the same valve stem model, each pressure value generated by the pressure sensor 10 represents the length of a valve stem thread rolling. When the preset pressure value is reached, it means that the length of the valve stem thread rolling meets the requirement. At this time, the controller automatically controls the two thread rolling wheels 2 to move away and stop the thread rolling operation. The extrusion plate 47 and the limit box 48 are pushed by the action of the spring, and the valve stem is automatically pushed out on the positioning wheel 44 to achieve the purpose of discharging.

[0034] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0035] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A valve stem thread rolling device, comprising a base (1) and two thread rolling wheels (2) rotatably arranged on the base (1), characterized in that: Also includes: A synchronous tilting assembly (3) is arranged on the base (1) and is used to make the two thread rolling wheels (2) tilt synchronously in different directions; A quantitative tilting component (4) is arranged on the synchronous tilting component (3) to synchronously adjust the tilting angles of the two thread rolling wheels (2); A support and collection assembly (5) is provided on the synchronous tilting assembly (3) and is used to support a valve stem that needs thread rolling; The pressure detection assembly (6) is arranged on the base (1) and is used to adjust the length of the valve stem thread rolling.

2. A valve stem thread rolling device according to claim 1, characterized in that: The synchronous tilting assembly (3) comprises: a sliding assembly (7), a rotating assembly (8) and a thread rolling assembly (9); the sliding assembly (7) is arranged on the base (1); and the sliding assembly (7) is connected to the thread rolling assembly (9) via the rotating assembly (8).

3. A valve stem thread rolling device according to claim 2, characterized in that: The sliding assembly (7) comprises two support plates (11) symmetrically arranged on the base (1), a sliding column (12) fixedly arranged between the two support plates (11) and a screw (13) rotatably arranged between the two support plates (11), wherein a driving motor (14) is connected to the outer side of one of the support plates (11), and the output end of the driving motor (14) rotates through one of the support plates (11) and is connected to the screw (13), and the outer sliding sleeve of the sliding column (12) is provided with two sliding plates (15) which are sleeved on the outer side of the screw (13) through threaded matching, and the threads at the two ends of the screw (13) are in opposite directions, and the sliding plate (15) is slidably sleeved on the outer side of the sliding column (12).

4. A valve stem thread rolling device according to claim 3, characterized in that: The rotating assembly (8) is provided in two pieces and is respectively arranged on two sliding plates (15). The rotating assembly (8) comprises a telescopic rod (16). The lower end of the telescopic rod (16) is hinged to the sliding plate (15) via a hinge seat (17). The other end of the telescopic rod (16) is hinged to the thread rolling assembly (9). The sliding plate (15) is a triangular frame structure. The sliding plate (15) is provided with a through hole which is sleeved on the outside of the telescopic rod (16).

5. A valve stem thread rolling device according to claim 4, characterized in that: The telescopic rod (16) comprises a cylinder (18), a sliding rod (19) and a piston (20); one end of the sliding rod (19) is connected to the piston (20); the piston (20) slides in the cylinder (18); and the lower end of the cylinder (18) is hinged to the sliding plate (15) via a hinge seat (17).

6. A valve stem thread rolling device according to claim 5, characterized in that: The thread rolling assembly (9) comprises an adjusting tube (21), the lower sides of both ends of the adjusting tube (21) being connected to a first L-shaped tube (23) via a rotating joint, the other end of the first L-shaped tube (23) being connected to a second L-shaped tube (24) via a rotating joint, the other end of the second L-shaped tube (24) being connected to an arc-shaped tube (25) penetrating a support plate (11) via a rotating joint, the arc-shaped tube (25) penetrating a hinge seat (17) via a rotating joint and being connected to the cylinder (18).

7. A valve stem thread rolling device according to claim 6, characterized in that: The quantitative tilting assembly (4) comprises a second piston (26), a second sliding rod (27) and a first frame (28). The second piston (26) is slidably arranged in the regulating tube (21). One end of the second piston (26) is connected to a second sliding rod (27) which slides through one end of the regulating tube (21). The first frame (28) is fixedly arranged on the outer side of the first sliding column (12). The regulating tube (21) is fixed to the lower side of the first frame (28). One end of the first frame (28) is connected to an electric push rod (31) via a fixing rod (30). The output end of the electric push rod (31) is connected to the second sliding rod (27). The sliding rod (27) is connected to the outer side of the first sliding column (12). A metal contact piece 1 (32) is connected to the rod 2 (27), a plurality of sliding columns 2 (33) are uniformly penetrated on the fixed rod (30), one end of the sliding column 2 (33) away from the metal contact piece 1 (32) is connected to a limit block (34), the other end of the sliding column 2 (33) is connected to a permanent magnet (35), a metal contact piece 2 (36) capable of abutting against the metal contact piece 1 (32) is embedded in the permanent magnet (35), the metal contact piece 1 (32) can be attracted by the permanent magnet (35), and the outer side of the sliding column 2 (33) is sleeved with springs respectively connected to the limit block (34) and the fixed rod (30).

8. The valve stem thread rolling device according to claim 7, characterized in that: The thread rolling assembly (9) comprises a rotating plate (38) respectively hinged on the sliding plate (15), two supporting plates (39) fixedly arranged on the rotating plate (38) and symmetrically arranged, and the thread rolling wheel (2) rotatably arranged in the two supporting plates (39), and a driving motor (37) is connected to one side of the supporting plate (11), and the output end of the driving motor (37) rotates through one of the supporting plates (39) and is connected to the thread rolling wheel (2).

9. The valve stem thread rolling device according to claim 8, characterized in that: The support and collection assembly (5) comprises a support plate three (40) connected to the frame body one (28), a collection box (41) connected to the support plate three (40), and an electric push rod two (42) fixed to the upper side of the collection box (41), wherein the output end of the electric push rod two (42) is connected to the frame body two (43), and a plurality of positioning wheels (44) are rotatably provided inside the frame body two (43).

10. The valve stem thread rolling device according to claim 9, characterized in that: The pressure detection assembly (6) comprises two support rods (45) connected to the base (1), a sliding column three (46) fixed to one side of the support rod (45), and an extrusion plate (47) slidably sleeved on the outside of the sliding column three (46), one side of the extrusion plate (47) is connected to a limit box (48), the outside of the sliding column three (46) is sleeved with a spring, one end of the spring away from the extrusion plate (47) is connected to an extrusion ring (29), one end of the sliding column three (46) is connected to a fixed plate (22), and the fixed plate (22) is connected to a pressure sensor (10) that abuts against the extrusion ring (29).

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