A screw production inspection machine

Abstract

The present invention discloses a screw production inspection machine applied to the inspection field, the inspection machine simultaneously inspects multiple screws of different specifications by adding multiple torsion columns, and simultaneously drives multiple torsion levers to twist the screws through a hydraulic telescopic cylinder, and utilizes the extrusion force during twisting to deform a twist-off sensing component, and then utilizes the hydraulic action to subject a pressure sensor to pressure, and when the screw is twisted off, the torque suddenly disappears, and at this time, the twist-off sensing component restores the deformation under its own elastic force, thereby causing the pressure on the pressure sensor to change, and records the pressure value when the pressure sensor changes through a pressure signal monitoring module, and converts the pressure value into a twist-off force value through a torsion force conversion module, thereby realizing the detection of the twist-off force of multiple screws, and by adding a self-adjusting wire clamping pad, it is possible to clamp screws with small size errors, effectively improving the adaptation range of the clamp and effectively improving the inspection efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing, and in particular to a testing machine for screw production. Background Art

[0002] The main function of screws is to connect two workpieces together and fasten them. Screws are used in general equipment, such as mobile phones, computers, cars, bicycles, various machine tools and equipment. Almost all machines use screws.

[0003] In order to ensure product quality during the production process, in addition to thread testing, screw breaking force also needs to be tested. Currently, screw breaking force testing machines are mostly used for testing. Although they are simple to operate, existing screw breaking force testing machines can only test one screw at a time, resulting in low testing efficiency and failing to meet testing requirements. Moreover, when testing screws of different specifications, corresponding fixtures are required for adaptation, but in actual use, not all fixtures can be adapted to the screws to be tested.

[0004] Therefore, we have developed this technical solution to address the problem that existing torsional force testing machines can only test one screw at a time. Summary of the Invention

[0005] The purpose of this invention is to improve upon existing screw torsion force testing machines. Compared to existing technologies, this invention provides a screw production testing machine that simultaneously tests multiple screws of different specifications by adding multiple torsion columns, effectively improving testing efficiency. A hydraulic telescopic cylinder simultaneously drives multiple torsion levers to twist the screws. The extrusion force during twisting causes deformation of the torsion sensing element, which in turn applies pressure to the pressure sensor using hydraulic pressure. When the screw breaks, the torque suddenly disappears, and the torsion sensing element recovers its deformation due to its own elastic force, thus changing the pressure on the pressure sensor. A pressure signal monitoring module records the pressure value at the time of the pressure sensor change, and a torsion force conversion module converts the pressure value into a torsion force value, thereby enabling the detection of the torsion force of multiple screws. Furthermore, the addition of a self-adjusting clamping pad allows for clamping of screws with small dimensional errors, effectively improving the adaptability of the fixture.

[0006] This allows for the simultaneous detection of the breaking force of multiple screws, effectively improving detection efficiency.

[0007] Furthermore, the self-adjusting screw clamping pad includes a polyurethane sleeve, and a steel screw clamping sleeve is fixedly connected to the outer layer of the polyurethane sleeve. The polyurethane sleeve has the ability to adjust elastically, so it can adaptively clamp screws with slight size deviations but not a perfect fit.

[0008] Furthermore, the torsion sensor has a fan-shaped structure, and the torsion sensor and the side wall of the slot together form a sealed space. The torsion sensor includes a side sealing plate and an end elastic sealing gasket. The sealing plate and the elastic sealing gasket together with the side wall of the slot form a sealed space. In this way, when the torsion lever starts to twist the torsion column, the torsion lever squeezes the torsion sensor, which in turn squeezes the driving fluid in the torsion sensor into the L-shaped hydraulic chamber to drive the piston to squeeze the pressure sensor. When the screw breaks, the sudden loss of torque causes the torsion sensor to recover its deformation, thereby recording the data when the screw breaks.

[0009] Furthermore, a recovery component is fixedly connected to the inner wall of the torsion sensing component near its end, and the inside of the torsion sensing component is also filled with an elastic mesh. The elastic mesh gives the torsion sensing component a strong recovery elasticity, so that the torsion sensing component can recover its deformation at the moment the screw is twisted off, and the recovery component further effectively increases the recovery deformation effect of the torsion sensing component.

[0010] Optionally, the recovery component includes two symmetrically distributed and sealed polyurethane diaphragms, and multiple equally spaced elastic stretching muscles are fixedly connected between the two polyurethane diaphragms. The elasticity of the polyurethane diaphragms and the elastic stretching muscles makes the recovery component have strong elasticity, thereby enhancing the recovery elasticity of the torsion sensing component.

[0011] Optionally, the size of multiple elastic stretch muscles gradually decreases from the middle to both sides, and the elastic stretch muscles are made of a highly elastic material. This is to enhance the recovery elasticity in the middle, thereby giving the recovery component a strong recovery elasticity.

[0012] Compared with the prior art, the advantages of this invention are:

[0013] (1) This solution improves the detection efficiency by adding multiple torsion columns to simultaneously detect multiple screws of different specifications. The hydraulic telescopic cylinder drives multiple torsion levers to twist the screws. The extrusion force during twisting causes the torsion sensing element to deform, and the hydraulic action causes the pressure sensor to be pressured. When the screw breaks, the torque will suddenly disappear. At this time, the torsion sensing element will recover its deformation due to its own elastic force, thereby causing the pressure sensor to change. The pressure value when the pressure sensor changes is recorded by the pressure signal monitoring module, and the pressure value is converted into the torsion force value by the torsion force conversion module, thereby realizing the detection of the torsion force of multiple screws. In addition, by adding self-adjusting clamping pads, screws with small dimensional errors can be clamped, effectively improving the adaptability of the fixture and realizing the simultaneous detection of the torsion force of multiple screws, thus effectively improving the detection efficiency.

[0014] (2) The self-adjusting clamping pad includes a polyurethane sleeve. The outer layer of the polyurethane sleeve is fixedly connected to a steel clamping screw sleeve. The polyurethane sleeve has the ability to adjust elastically, so it can adaptively clamp screws with slight size deviations but not completely fit.

[0015] (3) The torsion sensing element is a fan-shaped structure, and the torsion sensing element and the side wall of the slot together form a closed space. The torsion sensing element includes a side sealing plate and an end elastic sealing gasket. The sealing plate and the elastic sealing gasket together form a closed space with the side wall of the slot. When the torsion lever starts to twist the torsion column, the torsion lever squeezes the torsion sensing element, which in turn squeezes the driving fluid in the torsion sensing element into the L-shaped hydraulic chamber to drive the piston to squeeze the pressure sensor. When the screw breaks, the sudden disappearance of the torque causes the torsion sensing element to recover its deformation, thereby recording the data when the screw breaks.

[0016] (4) A recovery component is also fixedly connected to the inner wall of the twisted-off sensing component near the end, and the inside of the twisted-off sensing component is also filled with an elastic mesh. The elastic mesh makes the twisted-off sensing component have strong recovery elasticity, so that the twisted-off sensing component can recover its deformation at the moment the screw is twisted off, and the recovery component further effectively increases the recovery deformation effect of the twisted-off sensing component.

[0017] (5) The recovery component includes two symmetrically distributed and sealed polyurethane diaphragms, and multiple equally spaced elastic stretching muscles are fixedly connected between the two polyurethane diaphragms. The elasticity of the polyurethane diaphragms and the elastic stretching muscles makes the recovery component have strong elasticity, thereby enhancing the recovery elasticity of the torsion sensing component.

[0018] (6) The size of multiple elastic stretching muscles gradually decreases from the middle to both sides, and the elastic stretching muscles are made of high elasticity material. This is to strengthen the recovery elasticity in the middle, so that the recovery part has a strong recovery elasticity. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 These are two perspective views of the present invention;

[0021] Figure 3 This is a perspective view of the clamp and self-adjusting wire clamping pad of the present invention;

[0022] Figure 4 This is a perspective cross-sectional view of the torsion shell and the drive shell of the present invention;

[0023] Figure 5 This is a top cross-sectional view of the self-adjusting wire-clamping pad of the present invention;

[0024] Figure 6 This is a top view of the torsion sensing element of the present invention before torsion.

[0025] Figure 7 This is a top view of the torsion sensing element of the present invention after it has been torn.

[0026] Figure 8 This is a front cross-sectional view of the display housing of the present invention;

[0027] Figure 9 This is a partial structural diagram of the torsional force detection plate of the present invention;

[0028] Figure 10 This is a cross-sectional view of the response document of the present invention.

[0029] Explanation of the labels in the diagram:

[0030] 1. Base, 101. Adjustment seat, 2. Clamp seat, 3. Wire clamping block, 4. Self-adjusting wire clamping pad, 401. Polyurethane sleeve, 402. Steel clamping screw sleeve, 5. Adjusting screw, 6. Hydraulic column, 7. Connecting seat, 8. Pressure plate, 9. Torsion shell, 10. Torsion column, 1001. Slot, 1002. Cylindrical hydraulic chamber, 11. Screw head, 12. Drive shell, 13. Hydraulic telescopic cylinder, 14. Connecting plate, 15. Torsion lever, 16. Display shell, 17. Torsion sensing element, 1701. Elastic net, 18. Torsion force detection plate, 1801. L-shaped hydraulic chamber, 1802. Piston, 1803. Rubber buffer pad, 19. Pressure sensor, 20. Torsion force display screen, 21. Recovering element, 2101. Polyurethane diaphragm, 2102. Elastic stretching muscle. Detailed Implementation

[0031] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] Please refer to the following: A screw manufacturing inspection machine. Figure 1 , 2 3 and Figure 5The device includes a base 1, on which an adjusting seat 101 is fixedly connected. Two symmetrically distributed movable and fixed clamps are mounted on the adjusting seat 101. The movable and fixed clamps each include a clamp base 2 and a screw clamping block 3. The screw clamping block 3 has multiple equally spaced screw clamping slots, and a self-adjusting screw clamping pad 4 is fixedly connected to the side wall of each screw clamping slot. The self-adjusting screw clamping pad 4 includes a polyurethane sleeve 401, and a steel screw clamping sleeve 402 is fixedly connected to the outer layer of the polyurethane sleeve 401. The polyurethane sleeve 401 has elastic adjustment capabilities, allowing for adaptive clamping of screws with slight dimensional deviations that cannot be perfectly matched. An adjusting screw 5 is threadedly connected to the side wall of the adjusting seat 101. 5. The moving clamp is threadedly connected (the specific connection structure and working principle are well-known technologies familiar to those skilled in the mechanical field, and will not be described in detail here). A hydraulic column 6 is installed near the fixed clamp on the base 1 (the specific model is selected according to actual needs, and will not be described in detail here). A connecting seat 7 is fixedly connected to the upper end of the hydraulic column 6. A pressure plate 8 is fixedly connected to the side wall of the connecting seat 7. A torsion shell 9 is fixedly connected to the side wall of the pressure plate 8 directly above the self-adjusting wire clamping pad 4. Multiple torsion columns 10 are rotatably connected inside the torsion shell 9. The torsion columns 10 extend to the bottom of the pressure plate 8. A screw head 11 is installed at the lower end of each torsion column 10, and the screw head 11 corresponds to the self-adjusting wire clamping pad 4.

[0034] Please see Figure 4 , 6 and Figure 7A drive housing 12 is fixedly connected to the pressure plate 8. A horizontally placed hydraulic telescopic cylinder 13 (the specific model is selected according to actual needs and will not be described in detail here) is installed on one inner wall of the drive housing 12. A connecting plate 14 is fixedly connected to the output end of the hydraulic telescopic cylinder 13. A slot 1001 is opened in the middle inner wall of the torsion column 10, and a torsion lever 15 is rotatably connected in the slot 1001. Both the torsion housing 9 and the drive housing 12 have strip-shaped openings on their side walls, and the torsion lever 15 passes through the strip-shaped openings and is rotatably connected to the connecting plate 14. Torsion-breaking sensing elements 17 are fixedly connected to both side walls of the slot 1001 on both sides of the torsion lever 15. The torsion-breaking sensing elements 17 have a fan-shaped structure, and the torsion-breaking sensing elements 17 and the slot are connected to the torsion lever 15. The side walls of slot 1001 together form a sealed space. The torsion sensing element 17 includes a side sealing plate and an end elastic sealing gasket (preferably made of polyurethane elastic material, but other materials can be selected according to actual needs, which will not be described in detail here). The sealing plate and the elastic sealing gasket together with the side walls of slot 1001 form a sealed space. When the torsion lever 15 starts to twist the torsion column 10, the torsion lever 15 squeezes the torsion sensing element 17, thereby squeezing the driving fluid in the torsion sensing element 17 into the L-shaped hydraulic chamber 1801 to drive the piston 1802 to squeeze the pressure sensor 19. When the screw breaks, the sudden loss of torque causes the torsion sensing element 17 to recover its deformation, thereby recording the data when the screw breaks.

[0035] Example 2:

[0036] Based on Example 1, please refer to Figure 8 , 9Multiple display shells 16 corresponding to torsion columns 10 are fixedly embedded in the upper side wall of the torsion shell 9, and the upper end of the torsion column 10 extends into the interior of the display shell 16. A torsion force detection plate 18 is fixedly connected to the middle of the display shell 16, and L-shaped hydraulic cavities 1801 are opened on both sides of the inner wall of the torsion force detection plate 18. A cylindrical hydraulic cavity 1002 is opened on both sides of the inner wall of the torsion column 10, and the upper and lower ends of the cylindrical hydraulic cavity 1002 are respectively connected to the interior of the L-shaped hydraulic cavity 1801 and the torsion sensing element 17. The interiors of the cylindrical hydraulic cavity 1002, the L-shaped hydraulic cavity 1801 and the torsion sensing element 17 are all filled with driving fluid. The inner wall of the L-shaped hydraulic cavity 1801 is sealed and slidably connected with a live... The piston 1802 has a rubber buffer pad 1803 fixedly connected to its side wall via a connecting rod. The torsional force detection plate 18 is located at the end of the L-shaped hydraulic chamber 1801 and is also equipped with a pressure sensor 19 (the specific model is selected according to actual needs and will not be described in detail here). The rubber buffer pad 1803 is in contact with the pressure sensor 19. The interior of the display housing 16 also includes a pressure signal monitoring module and a torsional force conversion module. The upper side wall of the display housing 16 is fixedly embedded with a torsional force display screen 20, and the torsional force conversion module is electrically connected to the torsional force display screen 20 (the specific connection structure and working principle are well-known technologies to those skilled in the art and will not be described in detail here).

[0037] Please see Figure 10 The inner wall of the torsion sensing element 17 near its end is also fixedly connected to a recovery element 21, and the interior of the torsion sensing element 17 is filled with an elastic mesh 1701 (preferably made of rubber, but other materials can be selected according to actual needs, which will not be described in detail here). The elastic mesh 1701 gives the torsion sensing element 17 a strong recovery elasticity, so that the torsion sensing element 17 can recover its deformation at the moment the screw is twisted off. The recovery element 21 further effectively increases the recovery deformation effect of the torsion sensing element 17. The recovery element 21 includes two symmetrically distributed and sealed components. The polyurethane tympanic membrane 2101 is connected, and multiple elastic stretching muscles 2102 are fixedly connected between the two polyurethane tympanic membranes 2101. The elasticity of the polyurethane tympanic membrane 2101 and the elastic stretching muscles 2102 makes the recovery member 21 have strong elasticity, thereby enhancing the recovery elasticity of the torsion sensing member 17. The size of the multiple elastic stretching muscles 2102 gradually decreases from the middle to both sides, and the elastic stretching muscles 2102 are made of high elasticity material. This is to strengthen the recovery elasticity in the middle, so that the recovery member 21 has strong recovery elasticity.

[0038] The working principle of this scheme is as follows: First, screws of different specifications to be tested are placed into the screw clamping slots. Then, the adjusting screw 5 is rotated to allow the moving clamp to clamp the screws onto the fixed clamp. The self-adjusting clamping shim 4 can adaptively clamp screws with mismatched but small differences in size, thus eliminating the trouble of changing clamps and effectively improving the applicability of the clamps. Then, screw heads 11 of various specifications are installed at the lower end of the torsion column 10. The hydraulic column 6 is activated to lower the screw head 11 and tighten the screw. Next, the hydraulic telescopic cylinder 13 is activated to drive the connecting plate 14 to move. This allows multiple torsion levers 15 to twist the torsion column 10 simultaneously, thereby performing torsion breakage tests on multiple screws at the same time. During the screw twisting process, the torsion levers 15 compress the torsion breakage sensing element 17. The torsion breakage sensing element 17 is deformed under pressure, causing the internal driving fluid to enter the L-shaped hydraulic chamber 1801, thereby... The driving piston 1802 and the rubber buffer pad 1803 squeeze the pressure sensor 19. Before the screw is broken, the continuously applied torque is transmitted to the pressure sensor 19. The pressure signal monitoring module monitors the pressure detected by the pressure sensor 19 in real time, and then converts the pressure signal into a torque signal through the torsion force conversion module. Finally, it is displayed on the torsion force display screen 20. When the screw is broken, due to the sudden disappearance of the torque, the torsion sensing element 17 recovers its deformation under the action of its own restoring elasticity. The driving fluid in the L-shaped hydraulic chamber 1801 flows back into the interior of the torsion sensing element 17. At this time, the pressure of the rubber buffer pad 1803 on the pressure sensor 19 decreases. After the pressure signal monitoring module captures the change in the pressure sensor 19, it marks the last recorded data signal before the change as the torsion force of the screw, so that the torsion force of multiple screws can be detected at the same time.

[0039] The above description is only the best implementation method adopted by the present invention in combination with current practical needs, but the scope of protection of the present invention is not limited thereto.

Claims

1. A screw production inspection machine, comprising a base (1), an adjustment seat (101) being fixedly connected to the base (1), and two symmetrically distributed movable clamps and a fixed clamp being mounted on the adjustment seat (101), It is characterized in that The movable clamp and the fixed clamp both comprise a clamp seat (2) and a wire clamp block (3), the wire clamp block (3) being provided with a plurality of screw clamp grooves distributed at equal intervals, and a self-adjusting wire clamp pad (4) being fixedly connected to the side wall of the screw clamp groove, an adjusting screw (5) being threadedly connected to the side wall of the adjusting seat (101), and the adjusting screw (5) being threadedly connected to the movable clamp, a hydraulic column (6) being installed at a position close to the fixed clamp of the base (1), and the upper end of the hydraulic column (6) being fixedly connected to the connecting seat (7), the side wall of the connecting seat (7) is fixedly connected to a pressure plate (8), and the pressure plate (8) is located directly above the self-adjusting wire-clamping gasket (4), and the side wall is fixedly connected to a torsion shell (9), and the interior of the torsion shell (9) is rotatably connected to a plurality of equally spaced torsion columns (10), and the torsion columns (10) extend to the bottom of the pressure plate (8), and a screw head (11) is installed at the lower end of each torsion column (10), and the screw head (11) corresponds to the self-adjusting wire-clamping gasket (4); The pressure plate (8) is also fixedly connected to a drive housing (12), a horizontally placed hydraulic telescopic cylinder (13) is mounted on an inner wall of one side of the drive housing (12), and a connecting plate (14) is fixedly connected to the output end of the hydraulic telescopic cylinder (13), a slot (1001) is provided on the inner wall of the middle portion of the torsion column (10), and a torsion lever (15) is rotatably connected to the slot (1001), and a strip opening is provided on the side walls of the torsion housing (9) and the drive housing (12), and the torsion lever (15) passes through the strip opening and is rotatably connected to the connecting plate (14). The slot (1001) is located on both side walls of the torsion lever (15), and is fixedly connected to a torsion-break sensing member (17). The torsion-break sensing member (17) is a fan-shaped structure, and the torsion-break sensing member (17) and the side walls of the slot (1001) together form a closed space. The torsion-break sensing member (17) includes a side closing plate and an elastic sealing gasket at the end. The upper side wall of the torsion shell (9) is fixedly inlaid with a plurality of display shells (16) corresponding to the torsion column (10), and the upper end of the torsion column (10) penetrates into the interior of the display shell (16); A twist-off force detection plate (18) is fixedly connected to the middle of the display housing (16), and L-shaped hydraulic cavities (1801) are provided on both inner walls of the twist-off force detection plate (18). Columnar hydraulic cavities (1002) are provided on both inner walls of the torsion column (10), and the upper and lower ends of the columnar hydraulic cavity (1002) are respectively connected to the inside of the L-shaped hydraulic cavity (1801) and the twist-off sensing element (17). The insides of the columnar hydraulic cavity (1002), the L-shaped hydraulic cavity (1801) and the twist-off sensing element (17) are all filled with driving fluid, and the inner wall of the L-shaped hydraulic cavity (1801) is sealed. The seal is slidably connected to a piston (1802), and the side wall of the piston (1802) is fixedly connected to a rubber buffer pad (1803) via a connecting rod; the twist-off force detection plate (18) is located at the end of the L-shaped hydraulic chamber (1801) and is also equipped with a pressure sensor (19), and the rubber buffer pad (1803) is in contact with the pressure sensor (19); the interior of the display shell (16) also includes a pressure signal monitoring module and a torsion force conversion module; the upper side wall of the display shell (16) is fixedly inlaid with a twist-off force display screen (20), and the torsion force conversion module is electrically connected to the twist-off force display screen (20).

2. A screw production inspection machine according to claim 1, It is characterized in that The self-adjusting wire-clamping liner (4) comprises a polyurethane sleeve (401), and the outer layer of the polyurethane sleeve (401) is fixedly connected to a steel clamping screw sleeve (402).

3. A screw production inspection machine according to claim 1, It is characterized in that The inner wall of the twist-off sensing member (17) close to the end is also fixedly connected to a restoring member (21), and the interior of the twist-off sensing member (17) is also filled with an elastic net (1701).

4. A screw production inspection machine according to claim 3, It is characterized in that The restoring member (21) comprises two symmetrically distributed and sealed polyurethane eardrums (2101), and a plurality of elastic stretching muscles (2102) distributed at equal intervals are fixedly connected between the two polyurethane eardrums (2101).

5. A screw production inspection machine according to claim 4, It is characterized in that The sizes of the multiple elastic stretch muscles (2102) gradually decrease from the middle to the sides, and the elastic stretch muscles (2102) are made of high-elastic material.

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