Modularized wire material pressurizing screw head testing device and testing tool thereof

Abstract

The invention relates to the technical field of machine manufacturing, and particularly discloses a modularized wire material pressurization screw head testing device and a testing tool thereof. Three assembly tools are installed on one side of the top end of the test base, detection mechanisms are installed in the three assembly tools, a supporting frame is installed on the other side of the top end of the test base, and three stamping mechanisms are installed at the top end of the supporting frame. In the cold heading machining process, the wire material pushes the movable rod to move downwards, then the limiting block is pushed to move downwards in the detection box, and at the moment, the specific force value borne by the wire material in the cold heading process can be accurately obtained in real time through the first pressure sensor installed on the limiting block; and direct data support can be provided for optimization and adjustment of process parameters, the complexity and uncertainty of process debugging are reduced, it is ensured that the force value of each time of machining is stable, and the screw head forming quality is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical manufacturing, and particularly relates to a modular wire material pressurized screw head testing device and its testing tooling. Background Art

[0002] Cold heading is a process for machining parts at room temperature through plastic deformation of metals, and is widely used in the production of fasteners such as screw heads, bolts, and nuts. This process utilizes the plastic deformation ability of metals at room temperature, and applies pressure to the wire material through a mold to deform it into the shape of a screw head. With the surging demand for fasteners in the automotive and machinery industries, cold heading technology has gradually replaced traditional processes due to its high efficiency, energy conservation, and high material utilization rate.

[0003] During the cold heading process, due to the limitations of existing technical means, operators often cannot obtain the specific force values borne by the wire during cold heading in real time and accurately. This difficulty in force value measurement not only makes the optimization and adjustment of process parameters lack direct data support, increasing the complexity and uncertainty of process debugging, but also due to the lack of accurate measurement, the force values borne by the wire fluctuate during actual processing. This fluctuation in force values will further lead to inconsistent screw head forming quality, ultimately affecting the overall performance of the product. Summary of the Invention

[0004] The purpose of the present invention is to provide a modular wire material pressurized screw head testing device and its testing tooling, which can accurately measure the force borne by the wire material and provide process optimization data to solve the problem of difficult force value measurement in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A modular wire material pressurized screw head testing device and its testing tooling, comprising:

[0007] A testing base;

[0008] On one side of the top of the testing base, three assembly toolings are installed, and detection mechanisms are installed inside all three assembly toolings. On the other side of the top of the testing base, a support frame is installed, and three stamping mechanisms are installed on the top of the support frame;

[0009] The detection mechanism includes a female mold, a wire material hole, a movable rod, a detection box, a compression spring, a limit block, and a first pressure sensor. The female mold is installed on the top of the testing base, the wire material hole is opened on the top of the female mold, the movable rod is placed inside the wire material hole, the detection box is installed at the bottom of the female mold and is embedded in the top of the testing base, the compression spring is installed on the bottom inner wall of the detection box, the limit block is installed on the top of the compression spring, and the first pressure sensor is embedded in the top of the limit block.

[0010] Preferably, three limiting grooves are formed in the outer wall of the support frame, support feet are installed at the four corners of the bottom end of the test base, and a controller is installed in the middle of the outer wall of the test base.

[0011] Preferably, the female mold is installed inside the installation hole, the bottom end of the movable rod contacts the top end of the first pressure sensor, the limiting block is arranged in a convex structure, and the top end of the limiting block penetrates through the top inner wall of the detection box. The first pressure sensor is electrically connected to the controller.

[0012] Preferably, a first adjustment block is installed at the top end of one side of the assembly tooling, a first mold is installed at the top end of the first adjustment block, a second adjustment block is installed at the top end of the middle assembly tooling, a second mold is installed at the top end of the second adjustment block, a third adjustment block is installed at the top end of the other side of the assembly tooling, and a third mold is installed at the top end of the third adjustment block.

[0013] Preferably, a first assembly hole is formed in the middle of the top end of the first adjustment block, a second assembly hole is formed in the middle of the top end of the second adjustment block, and a third assembly hole is formed in the middle of the top end of the third adjustment block.

[0014] Preferably, an adjustment groove is formed in the top end of the assembly tooling, a through hole is formed in the middle of the bottom inner wall of the adjustment groove, adjustment bolts are installed on the four inner walls of the adjustment groove, an assembly port is formed in the lower part of the outer wall of the assembly tooling, and an installation hole is formed in the middle of the bottom inner wall of the assembly port.

[0015] Preferably, the through hole communicates with the assembly port, and the diameter of the through hole is larger than the diameters of the first mold, the second mold, and the third mold. The three assembly toolings are respectively located directly below the three stamping mechanisms.

[0016] Preferably, the stamping mechanism includes a hydraulic cylinder, a suppression mechanism, a limiting frame, a cold heading punch, and a second pressure sensor. The hydraulic cylinder is installed at the top end of the support frame, the suppression mechanism is installed at the bottom end of the hydraulic cylinder, the limiting frame is installed on the outer wall of the suppression mechanism, the cold heading punch is installed at the bottom end of the suppression mechanism, and the second pressure sensor is embedded in the middle of the bottom end of the cold heading punch.

[0017] Preferably, the suppression mechanism includes a buffer box, a suppression frame, buffer springs, and dampers. The buffer box is installed at the bottom end of the hydraulic cylinder, the suppression frame is inserted and installed at the bottom end of the buffer box, a plurality of buffer springs are provided, and the plurality of buffer springs are all installed in the middle of the top end of the suppression frame. Four dampers are provided, and the four dampers are respectively installed at the four corners of the top end of the suppression frame.

[0018] Preferably, the restraining frame is arranged in a shape of Chinese character 'Ri', the hydraulic cylinder and the second pressure sensor are both electrically connected to the controller, the limiting frame is arranged in a shape of Chinese character 'Gan', and the limiting frame is slidably connected to the corresponding limiting groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) A detection mechanism is arranged inside the assembly tooling of the present invention. During the cold heading process, the wire material pushes the movable rod downward, and then pushes the limiting block downward in the detection box. At this time, through the first pressure sensor installed on the limiting block, the specific force value that the wire material bears during the cold heading process can be obtained in real time and accurately, which can provide direct data support for the optimization and adjustment of process parameters, reduce the complexity and uncertainty of process debugging, ensure the stability of the force value for each processing, and improve the forming quality of the screw head.

[0021] (2) An adjusting block is arranged at the top of the assembly tooling of the present invention. By rotating the adjusting bolt, the position of the adjusting block inside the adjusting groove can be finely adjusted. This fine adjustment operation aims to ensure that when the test tooling simulates the actual processing environment, during multiple forming processes of the wire material, each time the mold presses down, the centering of the mold and the female mold can be kept consistent, thereby avoiding the problem of skewness of the screw head produced by cold heading.

[0022] (3) A stamping mechanism is arranged at the top of the support frame of the present invention. The hydraulic cylinder is used to push the restraining mechanism downward, so that the cold heading punch performs cold heading stamping on the mold. At the same time, the second pressure sensor is used to detect the force value again, which can enhance the detection effect of the force value. In addition, the restraining mechanism can absorb the pressure impact, smooth the force value curve, reduce fluctuations, and protect the mold and the tooling from instantaneous overload, thereby ensuring the consistency of the forming quality of the screw head. Description of the Drawings

[0023] Figure 1 is a perspective view of the present invention;

[0024] Figure 2 is a perspective view of the detection mechanism of the present invention;

[0025] Figure 3 is a cross-sectional view of the detection mechanism of the present invention;

[0026] Figure 4 is of the present invention Figure 3 the enlarged view of A in;

[0027] Figure 5 is a perspective view of the assembly tooling of the present invention;

[0028] Figure 6 is a perspective view of three adjusting blocks of the present invention;

[0029] Figure 7 It is a perspective view of the stamping mechanism of the present invention;

[0030] Figure 8 It is a cross-sectional view of the suppression mechanism of the present invention;

[0031] Figure 9 It is a stress curve graph of the first working station of the present invention;

[0032] Figure 10 It is a stress curve graph of the second working station of the present invention;

[0033] Figure 11 It is a stress curve graph of the third working station of the present invention;

[0034] Figure 12 It is a graph of 4 groups of comparative tests at the first working station of the present invention;

[0035] Figure 13 It is a graph of 4 groups of comparative tests at the second working station of the present invention;

[0036] Figure 14 It is a graph of 4 groups of comparative tests at the third working station of the present invention;

[0037] In the figure: 1. Test base; 2. Assembly tooling; 3. Detection mechanism; 4. Support frame; 5. Stamping mechanism; 6. Limit groove; 7. First adjusting block; 8. First die; 9. Second adjusting block; 10. Second die; 11. Third adjusting block; 12. Third die; 13. Support foot; 14. Controller; 15. First assembly hole; 16. Second assembly hole; 17. Third assembly hole;

[0038] 21. Adjusting groove; 22. Through hole; 23. Adjusting bolt; 24. Assembly port; 25. Mounting hole;

[0039] 31. Female die; 32. Wire material hole; 33. Movable rod; 34. Detection box; 35. Extrusion spring; 36. Limit block; 37. First pressure sensor;

[0040] 51. Hydraulic cylinder; 52. Suppression mechanism; 53. Limit frame; 54. Cold heading punch; 55. Second pressure sensor;

[0041] 521. Buffer box; 522. Suppression frame; 523. Buffer spring; 524. Damper. Detailed implementation mode

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0043] Example 1:

[0044] Please refer to Figures 1 to 14 as shown, a modular wire material pressurized screw head testing device and its testing tooling, comprising:

[0045] Testing base 1;

[0046] On one side of the top end of the testing base 1, three assembly toolings 2 are installed, and a detection mechanism 3 is installed inside each of the three assembly toolings 2. On the other side of the top end of the testing base 1, a support frame 4 is installed, and three stamping mechanisms 5 are installed on the top end of the support frame 4;

[0047] The detection mechanism 3 includes a female mold 31, a wire material hole 32, a movable rod 33, a detection box 34, a compression spring 35, a limit block 36, and a first pressure sensor 37. The female mold 31 is installed on the top end of the testing base 1, the wire material hole 32 is opened on the top end of the female mold 31, the movable rod 33 is placed inside the wire material hole 32, the detection box 34 is installed at the bottom end of the female mold 31, and the detection box 34 is embedded in the top end of the testing base 1. The compression spring 35 is installed on the bottom inner wall of the detection box 34, the limit block 36 is installed on the top end of the compression spring 35, and the first pressure sensor 37 is embedded in the top end of the limit block 36.

[0048] As Figures 1 to 4 can be seen, three limit grooves 6 are opened on the outer wall of the support frame 4, support feet 13 are installed at the four corners of the bottom end of the testing base 1, and a controller 14 is installed in the middle of the outer wall of the testing base 1.

[0049] As described above, during the process of cold heading processing test on the wire material, first place the wire material in the wire material hole 32 for fixation and ensure that the wire material is in contact with the movable rod 33. Subsequently, the stamping mechanism 5 is started to push the mold downward, thereby realizing the cold heading stamping processing of the wire material. During the processing, the impact force received by the wire material will push the movable rod 33 downward, further driving the limit block 36 to move downward in the detection box 34 and causing the compression spring 35 to contract, completing the stamping processing. At the same time, through the first pressure sensor 37 installed on the limit block 36, the specific force value borne by the wire material during cold heading can be obtained in real time and accurately, and the detected data is transmitted to the controller 14. These data provide direct data support for the optimization and adjustment of process parameters, reducing the complexity and uncertainty of process debugging. This testing tooling can realize the force value test during three cold heading stamping processes of the wire material, ensure that the force value received by the wire material during actual processing remains stable, improve the consistency of the screw head forming quality, and thus improve the overall performance of the final product.

[0050] Specifically, refer to Figures 1 to 4As shown, the female mold 31 is installed inside the installation hole 25. The bottom end of the movable rod 33 contacts the top end of the first pressure sensor 37. The limit block 36 is set in a convex structure, and the top end of the limit block 36 penetrates the top inner wall of the detection box 34. The first pressure sensor 37 is electrically connected to the controller 14.

[0051] As can be seen from the above, to ensure the correct installation of the female mold 31 in the assembly tooling 2 for subsequent stamping operations, through the movement of the movable rod 33, the pressure is transmitted to the first pressure sensor 37 for detecting pressure changes. The convex structure of the limit block 36 and its penetration of the top inner wall of the detection box 34 enable the movable rod 33 to move into the detection box 34 to achieve the stamping function, and the pressure signal detected by the first pressure sensor 37 can be transmitted to the controller 14 for subsequent processing and control.

[0052] Embodiment 2:

[0053] Reference Figure 1 、 Figure 5 and Figure 6 As shown, a first adjustment block 7 is installed at the top end of one side of the assembly tooling 2. A first mold 8 is installed at the top end of the first adjustment block 7. A second adjustment block 9 is installed at the top end of the middle assembly tooling 2. A second mold 10 is installed at the top end of the second adjustment block 9. A third adjustment block 11 is installed at the top end of the other side of the assembly tooling 2. A third mold 12 is installed at the top end of the third adjustment block 11;

[0054] A first assembly hole 15 is provided in the middle of the top end of the first adjustment block 7. A second assembly hole 16 is provided in the middle of the top end of the second adjustment block 9. A third assembly hole 17 is provided in the middle of the top end of the third adjustment block 11;

[0055] An adjustment groove 21 is provided at the top end of the assembly tooling 2. A through hole 22 is provided in the middle of the bottom inner wall of the adjustment groove 21. Adjustment bolts 23 are installed on the four inner walls of the adjustment groove 21. An assembly port 24 is provided at the lower part of the outer wall of the assembly tooling 2. An installation hole 25 is provided in the middle of the bottom inner wall of the assembly port 24.

[0056] As described above, first, place the wire stock in the detection mechanism 3 on one side and complete the following mold installation operations respectively: install the first mold 8 in the first adjustment block 7, install the second mold 10 in the second adjustment block 9, install the third mold 12 in the third adjustment block 11. Then, by rotating the adjustment bolt 23, finely adjust the position of the first adjustment block 7 inside the adjustment slot 21 to ensure that the axis of the first mold 8 is centered with the axis of the detection mechanism 3 below it. Then, the stamping mechanism 5 performs preliminary cold heading stamping on the wire stock in the detection mechanism 3 through the first mold 8. Subsequently, take out the preliminarily stamped wire stock and place it in the detection mechanism 3 in the middle, finely adjust the position of the second adjustment block 9 to make the axis of the second mold 10 centered with the axis of the detection mechanism 3 below it. After that, the stamping mechanism 5 performs secondary cold heading stamping on the wire stock in the detection mechanism 3 through the second mold 10. Finally, take out the wire stock after secondary stamping and place it in the detection mechanism 3 on the other side, finely adjust the position of the third adjustment block 11 to make the axis of the third mold 12 centered with the axis of the detection mechanism 3 below it. Then, the stamping mechanism 5 performs three - time cold heading stamping on the wire stock in the detection mechanism 3 through the third mold 12 to achieve the cold heading and pressure forming of the screw head. To sum up, by finely adjusting the position of the adjustment block, when the test tooling simulates the actual processing environment, it can ensure that during multiple forming processes of the wire stock, each time the mold presses down, the centering between the mold and the master mold 31 in the corresponding detection mechanism 3 can be kept consistent, thus avoiding the problem of the skew of the screw head punched by cold heading. Moreover, the first mold 8, the second mold 10, and the third mold 12 can be replaced according to different screw heads. The forming force of the screw head is about thirty - five to forty tons. Sufficient pressure can promote the refinement of material grains, improve the tensile strength, hardness, and wear resistance of the screw head, and further ensure that the screw head can be fully formed, enhancing the product strength and precision.

[0057] Preferably, as shown in Figure 1 , Figure 5 and Figure 6 , the through - hole 22 communicates with the assembly port 24, and the diameter of the through - hole 22 is larger than the diameters of the first mold 8, the second mold 10, and the third mold 12. The three assembly toolings 2 are respectively located directly below the three stamping mechanisms 5.

[0058] As described above, ensure that the first mold 8, the second mold 10, and the third mold 12 can all pass through the through - hole 22 to perform cold heading stamping on the wire stock, and ensure that each assembly tooling 2 can accurately correspond to a stamping mechanism 5 for efficient cold heading stamping operations.

[0059] Embodiment Three:

[0060] Refer to Figure 7 and Figure 8As shown in the figure, the stamping mechanism 5 includes a hydraulic cylinder 51, a damping mechanism 52, a limit frame 53, a cold heading punch 54 and a second pressure sensor 55. The hydraulic cylinder 51 is installed at the top end of the support frame 4, the damping mechanism 52 is installed at the bottom end of the hydraulic cylinder 51, the limit frame 53 is installed on the outer wall of the damping mechanism 52, the cold heading punch 54 is installed at the bottom end of the damping mechanism 52, and the second pressure sensor 55 is embedded in the middle of the bottom end of the cold heading punch 54;

[0061] The damping mechanism 52 includes a buffer box 521, a damping frame 522, buffer springs 523 and dampers 524. The buffer box 521 is installed at the bottom end of the hydraulic cylinder 51, the damping frame 522 is inserted and installed at the bottom end of the buffer box 521. A plurality of buffer springs 523 are provided, and the plurality of buffer springs 523 are all installed in the middle of the top end of the damping frame 522. Four dampers 524 are provided, and the four dampers 524 are respectively installed at the four corners of the top end of the damping frame 522.

[0062] As can be seen from the above, when conducting cold heading processing tests on wire materials, the controller 14 can be used to control the hydraulic cylinder 51 to start. The hydraulic cylinder 51 pushes the damping mechanism 52 to move downward. At this time, the limit frame 53 slides and is limited in the limit groove 6, thereby improving the stability of the damping mechanism 52 and enabling the cold heading punch 54 to perform cold heading stamping on the mold. At the same time, the second pressure sensor 55 can be used to detect the punching force value of the cold heading punch 54 again. Combining the detection results of the second pressure sensor 55 with the detection results of the first pressure sensor 37 can enhance the detection effect of the force value and improve the accuracy of the force value test. In addition, the damping mechanism 52 can absorb pressure shocks. Specifically, the damping frame 522 moves in the buffer box 521 for preliminary buffering, and then through the elastic cooperation of the buffer springs 523 and the damping characteristics of the dampers 524, the impact force is buffered again, thereby smoothing the force value curve, reducing the force value fluctuation, protecting the mold and tooling from instantaneous overload, and ensuring the stability of the force value for each processing and improving the consistency of the screw head forming quality.

[0063] Preferably, referring to Figure 7 and Figure 8 As shown in the figure, the damping frame 522 is set in a shape like the Chinese character 'Ri', the hydraulic cylinder 51 and the second pressure sensor 55 are both electrically connected to the controller 14, the limit frame 53 is set in a shape like the Chinese character 'Gan', and the limit frame 53 is slidably connected to the corresponding limit groove 6.

[0064] As can be seen from the above, the damping frame 522 in the shape of the Chinese character 'Ri' is used to provide stable support or restriction, ensuring the stability and accuracy of the stamping process. The controller 14 controls the action of the hydraulic cylinder 51 and receives the pressure signal detected by the second pressure sensor 55 for precise control and monitoring, ensuring that the limit frame 53 slides smoothly in the limit groove 6 to achieve precise positioning and restriction functions.

[0065] Example 4:

[0066] Reference Figures 9 to 11 As can be seen, different working conditions have a significant impact on the pressure change of the modular wire material pressurized screw head test device. These results provide an important basis for further optimizing the device design and test tooling. Figure 9 It shows the pressure change of the modular wire material pressurized screw head test device at different time points under working condition 1. As can be seen from the figure, the pressure rises rapidly in the initial stage, gradually decreases after reaching the peak, and finally stabilizes. Figure 10 It shows the trend of the pressure of the test device changing with time under working condition 2. Compared with working condition 1, the rising rate and peak value of the pressure are different, reflecting the influence of different working conditions on the pressure change. Figure 11 It shows the pressure-time change curve under working condition 3. The pressure change pattern under this working condition is significantly different from the previous two working conditions, further illustrating the influence of different test conditions on the device performance.

[0067] According to Figure 9 As shown, under working condition 1, the pressure rises rapidly in the initial stage, indicating that the device can quickly build pressure under this working condition. In contrast, Figure 10 and Figure 11 show the differences in pressure change under different working conditions, and these differences are of great significance for evaluating the performance of the device under different conditions.

[0068] Reference Figures 12 to 14 As shown, in the research on the modular wire material pressurized screw head test device and its test tooling, in order to analyze the performance of different groups during the pressurization process, force-displacement tests were carried out; from Figure 12 it can be seen that within a large displacement range, the force value change trends of different groups are different. Figure 13 It focuses on the small displacement stage and shows the differences in the initial pressurization performance of different groups. Figure 14 Furthermore, within the medium displacement range, the force-displacement relationship of different groups was analyzed in detail.

[0069] Through the comprehensive analysis of these charts, the pressurization characteristics of different groups of test devices and their tooling can be deeply understood.

[0070] Application Example:

[0071] This design is applied to the cold heading processing industry of metal wire rods, especially in scenarios where high-precision and high-efficiency production of fasteners such as screw heads is required. It is in a manufacturing factory in an industrial production environment, especially in a metal processing workshop. Among them, the environmental temperature and humidity need to be controlled within a certain range to ensure the stable operation of equipment and product quality. In terms of the automated production line, this design is integrated into an automated or semi-automated production line, closely connected with processes such as feeding, cutting, cold heading, and detection, forming a complete production process. This design sets up a detection mechanism 3, uses the first pressure sensor 37 to monitor the force value change of the wire rod during the cold heading process in real time, converts the force value signal into an electrical signal, and transmits it to the controller 14 for analysis and processing. By setting adjustable adjustment blocks inside the assembly tooling 2 and adjusting their positions, the relative position between the die and the female die 31 is changed to ensure that the centers of the die and the female die 31 are accurately aligned during each forming, thereby improving the processing accuracy. By setting up a stamping mechanism 5, it can absorb pressure shocks during cold heading, smooth the force value curve, reduce fluctuations. At the same time, a second pressure sensor 55 is integrated inside the stamping mechanism 5 to detect the stamping pressure again to ensure the stability and safety of the processing process.

[0072] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular wire material pressurized screw head testing device and its testing tooling, characterized in that, Including: A test base (1); On one side of the top end of the test base (1), three assembly jigs (2) are installed. Inside each of the three assembly jigs (2), a detection mechanism (3) is installed. On the other side of the top end of the test base (1), a support frame (4) is installed. On the top end of the support frame (4), three stamping mechanisms (5) are installed; The detection mechanism (3) includes a female mold (31), a wire hole (32), a movable rod (33), a detection box (34), a compression spring (35), a limit block (36), and a first pressure sensor (37). The female mold (31) is installed on the top end of the test base (1). The wire hole (32) is opened on the top end of the female mold (31). The movable rod (33) is placed inside the wire hole (32). The detection box (34) is installed at the bottom end of the female mold (31), and the detection box (34) is embedded in the top end of the test base (1). The compression spring (35) is installed on the bottom inner wall of the detection box (34). The limit block (36) is installed on the top end of the compression spring (35). The first pressure sensor (37) is embedded in the top end of the limit block (36).

2. The modular wire material pressurized screw head testing device and its testing tooling according to claim 1, characterized in that: On the outer wall of the support frame (4), three limit grooves (6) are opened. At the four corners of the bottom end of the test base (1), support feet (13) are installed. In the middle of the outer wall of the test base (1), a controller (14) is installed.

3. The modular wire material pressurized screw head testing device and its testing tooling according to claim 2, characterized in that: The female mold (31) is installed inside the installation hole (25). The bottom end of the movable rod (33) is in contact with the top end of the first pressure sensor (37). The limit block (36) is set as a convex structure, and the top end of the limit block (36) penetrates the top inner wall of the detection box (34). The first pressure sensor (37) is electrically connected to the controller (14).

4. A modular wire material pressurized screw head testing device and its testing tooling according to claim 1, characterized in that: On the top end of one side of the assembly jig (2), a first adjustment block (7) is installed. On the top end of the first adjustment block (7), a first mold (8) is installed. On the top end of the middle assembly jig (2), a second adjustment block (9) is installed. On the top end of the second adjustment block (9), a second mold (10) is installed. On the top end of the other side of the assembly jig (2), a third adjustment block (11) is installed. On the top end of the third adjustment block (11), a third mold (12) is installed.

5. The modular wire material pressurized screw head testing device and its testing tooling according to claim 4, characterized in that: In the middle of the top end of the first adjustment block (7), a first assembly hole (15) is opened. In the middle of the top end of the second adjustment block (9), a second assembly hole (16) is opened. In the middle of the top end of the third adjustment block (11), a third assembly hole (17) is opened.

6. The modular wire material pressurized screw head testing device and its testing tooling according to claim 5, characterized in that: On the top end of the assembly jig (2), an adjustment groove (21) is opened. In the middle of the bottom inner wall of the adjustment groove (21), a through hole (22) is opened. On the four side inner walls of the adjustment groove (21), adjustment bolts (23) are installed. On the lower part of the outer wall of the assembly jig (2), an assembly opening (24) is opened. In the middle of the bottom inner wall of the assembly opening (24), an installation hole (25) is opened.

7. A modular wire material pressurized screw head testing device and its testing tooling according to claim 6, characterized in that: The through hole (22) communicates with the assembly port (24), and the diameter of the through hole (22) is larger than the diameters of the first die (8), the second die (10), and the third die (12). The three assembly jigs (2) are respectively located directly below the three stamping mechanisms (5).

8. A modular wire material pressurized screw head testing device and its testing tooling according to claim 1, characterized in that: The stamping mechanism (5) includes a hydraulic cylinder (51), a suppression mechanism (52), a limit frame (53), a cold heading punch (54), and a second pressure sensor (55). The hydraulic cylinder (51) is installed at the top end of the support frame (4). The suppression mechanism (52) is installed at the bottom end of the hydraulic cylinder (51). The limit frame (53) is installed on the outer wall of the suppression mechanism (52). The cold heading punch (54) is installed at the bottom end of the suppression mechanism (52). The second pressure sensor (55) is embedded in the middle of the bottom end of the cold heading punch (54).

9. The modular wire material pressurized screw head testing device and its testing tooling according to claim 8, characterized in that: The suppression mechanism (52) includes a buffer box (521), a suppression frame (522), buffer springs (523), and dampers (524). The buffer box (521) is installed at the bottom end of the hydraulic cylinder (51). The suppression frame (522) is inserted and installed at the bottom end of the buffer box (521). A plurality of buffer springs (523) are provided, and the plurality of buffer springs (523) are all installed in the middle of the top end of the suppression frame (522). Four dampers (524) are provided, and the four dampers (524) are respectively installed at the four corners of the top end of the suppression frame (522).

10. A modular wire material pressurizing screw head testing device and its testing tooling according to claim 9, characterized in that: The suppression frame (522) is arranged in a structure shaped like the Chinese character 'Ri'. The hydraulic cylinder (51) and the second pressure sensor (55) are both electrically connected to the controller (14). The limit frame (53) is arranged in a structure shaped like the Chinese character 'Gan', and the limit frame (53) is slidably connected to the corresponding limit groove (6).

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