Electrode pressure measuring device and testing method

Abstract

The present invention provides an electrode pressure measuring device and a testing method, which belong to the field of equipment detection technology. The measuring device includes a sleeve, a positioning component, a pressure detection component and a display device. A accommodating cavity is formed inside the sleeve; the positioning component is arranged on the sleeve, and is used to accurately press electrode rods of different specifications and types into the accommodating cavity; the pressure detection component is arranged on the upper part of the sleeve, and is used to detect the pressure of the electrode rod, and the pressure detection component is electrically connected to the display device. The pressure detection component in the device senses the electrode pressure of the electrode rod, especially the non-standard electrode rods of different specifications, generates an electrical signal and transmits it to the display device, and the display device converts the electrical signal into a numerical signal and displays it. The operation of the present invention solves the problem of hand-held operation during the electrode pressure measurement process, eliminates the data error caused by inaccurate measurement points, has the advantages of low cost, small size, easy operation, high precision, strong repeatability, wide applicability, high safety, etc., and has important use value.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and more specifically, relates to an electrode pressure measuring device and a testing method. Background Art

[0002] With the continuous promotion and application of automation technology in the field of intelligent manufacturing, resistance spot welding, as an important automated welding technology, has been widely used in manufacturing industries such as automobiles, rail trains, aerospace, etc. Welding pressure is an important parameter of resistance spot welding. The accuracy of the pressure value during welding greatly affects the quality of spot welding joints. In recent years, with the continuous innovation of electronic technology, resistance spot welding equipment has begun to try to directly equip pressure test modules. However, during use, the strong magnetic effect generated by strong current will interfere with the measurement of pressure elements under working conditions, which seriously affects the determination of resistance spot welding pressure values. In addition, during spot welding, repeated rigid collisions occur between electrode rods under the action of electrode pressure. After long-term service, the pressure accuracy of the equipment will drop significantly. Therefore, it is of great significance to use external supporting devices to regularly measure and calibrate the electrode pressure for resistance spot welding to maintain accurate and stable electrode pressure.

[0003] At present, the widely popular spot welding supporting pressure measuring instruments on the market all use pressure sensing blocks to convert the measured pressure into various electrical signals to measure the pressure value. The output signal of this type of pressure measuring instrument is easy to transmit remotely, and can be conveniently displayed, recorded and adjusted. For industrial products, resistance spot welding will use non-standard electrode rods designed according to specific needs, and the shape and size of the electrode cap will also change at the same time, making pressure measurement more difficult. During the measurement process, the operator needs to hold the middle of the electrode rod, and the stability of the electrode rod is poor, which reduces the accuracy of pressure measurement. More importantly, the range of electrode pressure of resistance spot welding equipment is large, up to more than ten KN. Handheld pressure transmitters seriously threaten the personal safety of operators and are prone to personal safety accidents. Summary of the invention

[0004] The purpose of the present invention is to provide an electrode pressure measuring device, aiming to solve the problems of poor stability of handheld operation and potential safety hazards in measuring electrode pressure.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide an electrode pressure measuring device, comprising:

[0006] A sleeve, wherein a receiving cavity for receiving the electrode rod is formed inside;

[0007] A positioning assembly, arranged on the sleeve;

[0008] A pressure detection assembly, disposed on the upper portion of the sleeve, for detecting the pressure of the electrode rod, wherein the pressure detection assembly is electrically connected to a display device;

[0009] The electrode rod is pressed into the accommodating cavity by the positioning assembly, the pressure of the electrode rod is detected by the pressure detection assembly, and the pressure value is displayed by the display device.

[0010] Furthermore, the positioning component comprises:

[0011] A conical sleeve is fixedly arranged at the lower end of the sleeve, and its inner cavity is communicated with the accommodating cavity, and is used to accommodate the electrode rod. The outer diameter of the conical sleeve gradually decreases from top to bottom, and a plurality of notches are opened in the circumferential direction of the lower end of the conical sleeve. The plurality of notches divide the lower end of the conical sleeve into a plurality of pressing plates for pressing the electrode rod;

[0012] A screw sleeve, threadedly sleeved on the outer wall of the tapered sleeve;

[0013] When the screw sleeve rotates and rises along the outer wall of the conical sleeve, the screw sleeve is used to apply pressure to the multiple pressure plates to press the electrode rod; when the screw sleeve rotates and descends along the outer wall of the conical sleeve, the screw sleeve releases the pressure of the multiple pressure plates to loosen the electrode rod.

[0014] Furthermore, an anti-skid pad is provided on the inner side wall of the conical sleeve, and the plurality of pressing plates are used to press the electrode rods through the anti-skid pad.

[0015] Furthermore, the pressure detection component comprises:

[0016] The pressure transmitter is arranged on the upper part of the sleeve and is electrically connected to the display device. A strain gauge is arranged on one side of the pressure transmitter, and a strain compensator is installed on the lower end surface to abut against the electrode rod.

[0017] Furthermore, a tray for placing the display device is provided on one side of the sleeve, and the tray is connected to the sleeve via a connecting rod.

[0018] Furthermore, the upper end surface of the sleeve is provided with a mounting groove connected to the accommodating cavity, a protective shell is placed in the mounting groove, and the pressure detection component is arranged in the protective shell.

[0019] Furthermore, the pressure detection component is electrically connected to the display device via a wire, and a clearance groove for passing the wire is provided on one side of the installation groove.

[0020] Furthermore, a through hole communicating with the accommodating cavity is formed on the side wall of the sleeve, and a laser locator is installed on the side wall of the sleeve, and the laser locator observes the position of the upper end surface of the electrode rod through the through hole.

[0021] Furthermore, the electrode pressure measuring device further comprises:

[0022] A plurality of adjusting bolts are evenly distributed around the circumference of the sleeve and penetrate through the side wall of the sleeve, and are used to press against the electrode rod to adjust the verticality of the electrode rod.

[0023] The beneficial effect of the electrode pressure measuring device provided by the present invention is that compared with the prior art, in the electrode pressure measuring device of the present invention, the electrode rod is inserted into the sleeve from bottom to top, the upper end of the electrode rod is against the pressure detection component, the pressure detection component is electrically connected to the display device, and the electrode rod is fixed by the positioning component to keep the electrode rod stable. The pressure detection component senses the electrode pressure of the electrode rod, generates an electrical signal and transmits it to the display device, and the display device converts the electrical signal into a numerical signal and displays it. This solves the problem of not needing handheld operation when measuring electrode pressure, has good operational stability, improves the accuracy and reliability of the measurement data, and does not cause harm to the operator.

[0024] The present invention also provides a method for testing an electrode pressure measuring device, comprising the following steps:

[0025] The anti-skid pad is installed in the conical sleeve at the lower part of the sleeve, and the electrode rod passes through the conical sleeve from bottom to top and enters the sleeve, and the upper end surface of the electrode rod is level with the bottom surface of the installation groove, and the screw sleeve on the conical sleeve is rotated, and the multiple pressing plates of the conical sleeve are bent inward, and the side wall of the electrode rod is pressed tightly through the anti-skid pad;

[0026] Rotate a plurality of adjusting bolts, so that the plurality of adjusting bolts simultaneously press against the side wall of the electrode rod, and adjust the electrode rod so that the electrode rod and the sleeve are coaxial;

[0027] The pressure transmitter is installed in the installation groove, and the display device is installed on the tray. The strain compensator is against the upper end surface of the electrode rod. The strain meter and the strain compensator are used to measure the pressure value of the upper end surface of the electrode rod, and the pressure value is converted into an electrical signal by the pressure transmitter and transmitted to the display device to display the pressure value.

[0028] The testing method of the electrode pressure measuring device provided by the present invention has the beneficial effect that, compared with the prior art, in the testing method of the electrode pressure measuring device of the present invention, the electrode rod is inserted into the sleeve from bottom to top, the upper end of the electrode rod is against the pressure detection component, the pressure detection component is electrically connected to the display device, and the electrode rod is fixed by the positioning component to keep the electrode rod stable. The pressure detection component senses the electrode pressure of the electrode rod, generates an electrical signal and transmits it to the display device, and the display device converts the electrical signal into a numerical signal and displays it. This solves the problem of not needing handheld operation when measuring electrode pressure, has good operational stability, improves the accuracy and reliability of the measurement data, and does not cause harm to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A front view of an electrode pressure measuring device provided by an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of an electrode pressure measuring device provided in an embodiment of the present invention;

[0032] Figure 3 A top view of an electrode pressure measuring device provided in an embodiment of the present invention;

[0033] Figure 4 A cross-sectional view of an electrode pressure measuring device provided in another embodiment of the present invention;

[0034] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0035] In the figure: 1. sleeve; 2. positioning assembly; 201. conical sleeve; 202. notch; 203. pressure plate; 204. screw sleeve; 3. pressure detection assembly; 301. pressure transmitter; 302. strain gauge; 303. strain compensator; 4. display device; 5. anti-slip mat; 6. tray; 7. connecting rod; 8. mounting groove; 9. protective shell; 10. wire; 11. clearance groove; 12. through hole; 13. laser locator; 14. adjusting bolt; 15. electrode rod; 16. spring; 17. adjusting rod; 18. baffle. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] The electrode pressure measuring device provided by the present invention is now described. Figures 1 to 3 The electrode pressure measuring device includes a sleeve 1, a positioning component 2, a pressure detection component 3 and a display device 4.

[0038] The interior of the sleeve 1 forms a receiving cavity for receiving the electrode rod 15; the positioning component 2 is arranged on the sleeve 1; the pressure detection component 3 is arranged on the upper part of the sleeve 1, and is used to detect the pressure of the electrode rod 15, and the pressure detection component 3 is electrically connected to the display device 4; the electrode rod 15 is pressed into the receiving cavity by the positioning component 2, and the pressure of the electrode rod 15 is detected by the pressure detection component 3, and the pressure value is displayed by the display device 4.

[0039] The electrode rod 15 is a tapered rod, and the diameter of the upper end is smaller than the diameter of the lower end. The shape of the accommodating cavity of the sleeve 1 matches the outer contour of the electrode rod 15. When the electrode rod 15 is inserted into the accommodating cavity, the outer wall of the electrode rod 15 is at the same distance from the inner wall of the sleeve 1. The electrode rod 15 is fixed by the positioning component 2 at the lower end of the sleeve 1 to keep it stable. The pressure detection component 3 is installed at the upper end of the sleeve 1. At this time, the upper end face of the electrode rod 15 is against the pressure detection component 3. The pressure detection component 3 senses the pressure change at the upper end of the electrode rod 15, forms an electrical signal and transmits it to the display device 4. The display device 4 is a microcomputer system with an analysis program and a display screen loaded thereon. The display device 4 receives the electrical signal of the pressure detection component 3, forms a data signal after calculating and analyzing the measured value, and the data signal displays the pressure value through the display screen.

[0040] Compared with the prior art, the electrode pressure measuring device provided by the present invention has an electrode rod 15 that is inserted into the sleeve 1 from bottom to top, and the upper end of the electrode rod 15 is against the pressure detection component 3. The pressure detection component 3 is electrically connected to the display device 4, and the electrode rod 15 is fixed by the positioning component 2 to keep the electrode rod 15 stable. The pressure detection component 3 senses the electrode pressure of the electrode rod 15, generates an electrical signal and transmits it to the display device 4, and the display device 4 converts the electrical signal into a numerical signal and displays it. This solves the problem of not needing to hold the operation when measuring the electrode pressure, and has good operational stability, thereby improving the accuracy and reliability of the measurement data and not causing harm to the operator.

[0041] As a specific implementation of the present invention, please refer to Figure 1 to Figure 2The positioning assembly 2 includes a conical sleeve 201 and a screw sleeve 204. The conical sleeve 201 is fixedly arranged at the lower end of the sleeve 1. The inner cavity of the conical sleeve 201 is a cylindrical cavity. The inner cavity of the conical sleeve 201 is connected with the accommodating cavity and is used to accommodate the electrode rod 15. The outer diameter of the conical sleeve 201 gradually decreases from top to bottom. The lower end of the conical sleeve 201 is provided with a plurality of notches 202 in the circumferential direction. The plurality of notches 202 separate the lower end of the conical sleeve 201 into a plurality of pressing plates 203 for pressing the electrode rod 15. The screw sleeve 204 is threadedly mounted on the outer wall of the conical sleeve 201. The screw sleeve 204 rotates and rises and falls along the outer wall of the conical sleeve 201 to apply pressure to the plurality of pressing plates 203 to press the electrode rod 15, or release the pressure of the plurality of pressing plates 203 to release the electrode rod 15. In this embodiment, the conical sleeve 201 is integrally formed with the sleeve 1 and is located at the lower end of the sleeve 1. The inner cavity of the conical sleeve 201 is connected to the accommodating cavity of the sleeve 1. The outer diameter of the conical sleeve 201 gradually decreases from top to bottom. The electrode rod 15 penetrates the conical sleeve 201 from bottom to top and enters the sleeve 1, so that its upper part abuts against the pressure detection component 3. A notch 202 is circumferentially provided at the lower end of the conical sleeve 201. The opening direction of the notch 202 faces downward, and the open end is located at the lower end surface of the conical sleeve 201. Multiple notches 202 divide the lower end of the side wall of the conical sleeve 201 into multiple pressure plates 203. The lower part of the pressure plate 203 is a free end. The lower part of the outer wall of the conical sleeve 201 is circumferentially provided with an external thread, that is, the external thread is provided on the outer side surface of the pressure plate 203. The inner wall of the screw sleeve 204 is provided with an internal thread that matches the external thread of the tapered sleeve 201. The screw sleeve 204 is rotated to make it rotate and rise along the tapered sleeve 201 through the threaded fit. Since the diameter of the external thread on the outer wall of the tapered sleeve 201 increases when the screw sleeve 204 rotates upward, the screw sleeve 204 will squeeze the multiple pressing plates 203 inward, so that the multiple pressing plates 203 are bent inward at the same time, and the free ends of the multiple pressing plates 203 are against the side wall of the electrode rod 15, thereby completing the fixation of the electrode rod 15.

[0042] As a specific implementation of the present invention, please refer to Figure 2The inner wall of the conical sleeve 201 is provided with an anti-skid pad 5, and the plurality of pressing plates 203 are used to press the electrode rod 15 through the anti-skid pad 5. In this embodiment, the anti-skid pad 5 is a cylindrical structure, which is sleeved on the inner wall of the conical sleeve 201. When the electrode rod 15 is fixed, the plurality of pressing plates 203 abut against the side wall of the electrode rod 15 through the anti-skid pad 5, which can prevent the pressing plates 203 and the side wall of the electrode rod 15 from slipping. At the same time, the anti-skid pad 5 can protect the electrode rod 15 and prevent the pressure of the pressing plates 203 from being too large, causing indentations or even damage to the side wall of the electrode rod 15. When selecting the anti-skid pad 5, it is necessary to refer to the size of the electrode rod 15 and the lower port of the conical sleeve 201. The inner diameter of the lower port of the conical sleeve 201 is D1, the thickness of the anti-skid pad 5 is D2, and the cross-sectional diameter of the electrode rod 15 at the lower port of the conical sleeve 201 is D3, that is, the gap h between the side wall of the electrode rod 15 and the lower port of the conical sleeve 201 is (D1-D3) / 2. When selecting the thickness D2 of the anti-skid pad 5, the gap h value between the side wall of the electrode rod 15 and the lower port of the conical sleeve 201 can be referred to. On the basis of the h value, 0.4 to 0.8 mm is added to reserve the deformation of the anti-skid pad 5, that is, D2 = [(D1-D3) / 2] + (0.4 to 0.8). The anti-skid pad 5 is a detachable component and is selected based on the size of the electrode rod 15. Therefore, it meets the use requirements of electrode rods 15 of different sizes and specifications, and performs pressure measurement on non-standard electrode rods 15 of different sizes.

[0043] As a specific implementation of the present invention, please refer to Figure 2 The pressure detection assembly 3 includes a pressure transmitter 301. The pressure transmitter 301 is arranged at the upper part of the sleeve 1 and is electrically connected to the display device 4. A strain gauge 302 is arranged on one side of the pressure transmitter 301, and a strain compensator 303 for abutting against the electrode rod 15 is installed on the lower end surface. In this embodiment, the upper and lower end surfaces of the pressure transmitter 301 are both concave surfaces, and the strain gauge 302 is installed in the concave surface at the lower end of the pressure transmitter 301. The strain gauge 302 is installed on the side of the pressure transmitter 301. The pressure transmitter 301 can detect physical pressure, receive pressure variable parameters, and convert the pressure variable parameters into standard electrical signals, and transmit the electrical signals to the electronic device, that is, the above-mentioned display device 4, to display the pressure value. The strain gauge 302 measures the deformation of the deformable object, and converts it into a change in an electrical physical quantity that can be easily measured through changes such as resistance, capacitance or inductance, that is, generates an induced electrical signal and transmits it to the display device 4. The strain compensator 303 is used to compensate for deformation and is a compensation element. It absorbs deformation to prevent excessive pressure on the electrode rod 15 from damaging the pressure transmitter 301. When pressure is generated on the electrode rod 15, the strain gauge 302 cooperates with the strain compensator 303 to measure the pressure on the electrode rod 15.

[0044] As a specific implementation of the present invention, please refer to Figures 1 to 3A tray 6 for placing the display device 4 is provided on one side of the sleeve 1, and the tray 6 is connected to the sleeve 1 through a connecting rod 7. In this embodiment, the tray 6 is a rectangular plate, the connecting rod 7 is L-shaped, one end of the connecting rod 7 is vertically connected to the side wall of the sleeve 1, and the other end of the connecting rod 7 is vertical to the bottom surface of the tray 6. The display device 4 is installed on the upper end surface of the tray 6 by bolting, clamping or welding. The sleeve 1, the connecting rod 7 and the tray 6 are integrally formed.

[0045] As a specific implementation of the present invention, please refer to Figure 2 , Figure 3 and Figure 5 , the upper end surface of the sleeve 1 is provided with a mounting groove 8 connected to the accommodating cavity, a protective shell 9 is placed in the mounting groove 8, and the pressure detection assembly 3 is arranged in the protective shell 9. In this embodiment, the inner contour of the mounting groove 8 matches the outer contour of the protective shell 9, and the cross-section is circular. A groove is provided in the protective shell 9, and the pressure transmitter 301 is installed in the groove in the protective shell 9. The inner diameter of the mounting groove 8 is 0.02 mm larger than the outer diameter of the protective shell 9. The protective shell 9 can be placed in the mounting groove 8 to ensure the stability of the protective shell 9, so that the axis of the pressure transmitter 301 is consistent with the axis of the electrode rod 15, thereby meeting the measurement requirements of the electrode rods 15 with different cross-sectional shapes and sizes. The depth of the mounting groove 8 is 5 to 10 mm less than the height of the protective shell 9. A positioning plate is provided in the circumferential direction of the lower part of the side wall of the mounting groove 8. The positioning plate is integrally formed with the sleeve 1. The positioning plate is used to limit the depth of the protective shell 9 inserted into the mounting groove 8, so that the lower end of the pressure transmitter 301 on the protective shell 9 can be in good contact with the upper end surface of the electrode rod 15. The upper end of the pressure transmitter 301 exposes the protective cover 9. If it is not exposed, the protective shell 9 will undergo slight plastic deformation under the electrode pressure, which will reduce the detection accuracy of the pressure detection component 3. The strain gauge 302 measures and converts the slight elastic-plastic deformation into a feedback electrical signal. The pressure transmitter 301 is embedded in the protective shell 9. The protective shell 9 has two main functions. The first is to protect the electronic components in the pressure detection component 3; the second is to prevent the pressure detection component 3 from falling off from the electrode rod hole 15 when it is directly placed on the electrode rod 15.

[0046] As a specific implementation of the present invention, please refer to Figures 2 to 3 The pressure detection assembly 3 is electrically connected to the display device 4 through the wire 10, and a clearance groove 11 for passing the wire 10 is provided on one side of the installation groove 8. In this embodiment, the connection terminal of the pressure transmitter 301 and the connection terminal of the display device 4 are arranged opposite to each other and connected through the wire 10. The clearance groove 11 is provided on the upper end surface of the sleeve 1 and close to one side of the tray 6. The clearance groove 11 can be an arc groove or a rectangular groove. The wire 10 passes through the clearance groove 11, which reduces the connection distance of the wire 10. At the same time, the wire 10 is placed in the clearance groove 11 to be more concealed and not easily damaged.

[0047] As a specific implementation of the present invention, please refer to Figures 1 to 3 A through hole 12 communicating with the accommodating cavity is provided on the side wall of the sleeve 1. A laser locator 13 is installed on the side wall of the sleeve 1. The laser locator 13 observes the position of the upper end face of the electrode rod 15 through the through hole 12. In this embodiment, the laser locator 13 is also called a laser positioning collimator. The laser beam provided is a high-definition, easy-to-distinguish laser beam, which is used to measure the position and levelness of the electrode rod 15. A magnetic base is provided on one side of the laser locator 13. The laser locator 13 is adsorbed on the side wall of the sleeve 1 through the magnetic base. The central axis of the through hole 12 is perpendicular to the central axis of the sleeve 1. The laser beam emitted by the laser locator 13 passes through the through hole 12, which is used to measure the levelness of the end face of the electrode rod 15, ensuring that the upper end face of the electrode rod 15 is in good contact with the pressure transmitter 301, and realizing pressure detection.

[0048] As a specific implementation of the present invention, please refer to Figures 1 to 3 The electrode pressure measuring device also includes a plurality of adjusting bolts 14. The plurality of adjusting bolts 14 are evenly distributed around the circumference of the sleeve 1 and penetrate the side wall of the sleeve 1, and are used to press against the electrode rod 15 and adjust the verticality of the electrode rod 15. In this embodiment, three threaded holes are evenly opened around the circumference of the sleeve 1, and the threaded holes all penetrate the side wall of the sleeve 1, and the central axis of the threaded holes is perpendicular to the central axis of the sleeve 1. The three adjusting bolts 14 can be adjusted individually or simultaneously. By rotating the adjusting bolts 14, the ends of the three adjusting bolts 14 press against the side wall of the electrode rod 15 respectively, forming three force points, and using three points to ensure the coaxiality of the electrode rod 15 and the sleeve 1.

[0049] As a specific implementation of the present invention, please refer to Figure 4 The electrode pressure measuring device also includes a plurality of adjusting rods 17. The plurality of adjusting rods 17 are evenly distributed in the circumference of the sleeve 1 and penetrate the side wall of the sleeve 1. A baffle 18 is fixedly arranged at one end of the adjusting rod 17 away from the sleeve 1. A spring 16 is sleeved on the adjusting rod 17. The spring 16 is located between the baffle 18 and the outer side wall of the sleeve 1 and is fixed to the baffle 18 and the sleeve 1 respectively. When the end of the adjusting rod 17 abuts against the side wall of the electrode rod 15, the spring 16 is in an extended state and pulls the baffle 18 in the reverse direction toward the inner cavity of the sleeve 1, so that the baffle 18 drives the adjusting rod 17 to abut against the side wall of the electrode rod 15. There are three adjusting rods 17, and the ends of the three adjusting rods 17 abut against the side wall of the electrode rod 15 respectively, forming three force points, and using three points to ensure the coaxiality of the electrode rod 15 and the sleeve 1.

[0050] The present invention also provides a method for testing an electrode pressure measuring device, comprising the following steps:

[0051] The anti-skid pad 5 is installed in the conical sleeve 201 at the lower part of the sleeve 1. The electrode rod 15 passes through the conical sleeve 201 from bottom to top and enters the sleeve 1. The upper end surface of the electrode rod 15 is level with the bottom surface of the installation groove 8. The screw sleeve 204 on the conical sleeve 201 is rotated, and the multiple pressing plates 203 of the conical sleeve 201 are bent inward, and the side wall of the electrode rod 15 is pressed tightly through the anti-skid pad 5.

[0052] The plurality of adjusting bolts 14 are rotated so that the plurality of adjusting bolts 14 simultaneously press against the side wall of the electrode rod 15, and the electrode rod 15 is adjusted to be coaxial with the sleeve 1;

[0053] The pressure transmitter 301 is installed in the installation groove 8 through the protective shell 9, and the display device 4 is installed on the tray 6. The strain compensator 303 is against the upper end surface of the electrode rod 15. The strain meter 302 and the strain compensator 303 are used to measure the pressure value of the upper end surface of the electrode rod 15, and are converted into electrical signals through the pressure transmitter 301 and transmitted to the display device 4 to display the pressure value.

[0054] The adjusting rod 17 can replace the adjusting bolt 14 , and the elastic force of the spring 16 drives the multiple adjusting rods 17 to press against the electrode rod 15 , so that the electrode rod 15 is coaxial with the sleeve 1 , thereby ensuring the horizontality of the upper end surface of the electrode rod 15 .

[0055] A testing method for an electrode pressure measuring device is mainly used for measuring the electrode pressure on a non-standard electrode rod 15 and improving the personal safety of an operator.

[0056] First, the selected anti-skid pad 5 adopts a cylindrical structure. According to the calculation formula D2=[(D1-D3) / 2]+(0.4~0.8), D1 is the inner diameter of the lower port of the conical sleeve 201, D2 is the thickness of the anti-skid pad 5, and D3 is the end face diameter of the electrode rod 15 at the lower port of the conical sleeve 201. The thickness of the anti-skid pad 5 is determined, and the outer diameter of the anti-skid pad 5 is in good fit with the inner hole of the conical sleeve 201, or is 0.5~1mm smaller than the inner hole diameter, thereby determining the anti-skid pad 5.

[0057] Then, by tightening the nut 204, the electrode rod 15 is initially fixed and cannot move freely. Next, the position of the sleeve 1 on the electrode rod 15 is fine-tuned so that the upper end of the electrode rod 15 just blocks the laser from projecting to the bottom surface of the mounting groove 8, and the adjusting bolt 14 is further tightened, and the adjusting bolt 14 is gradually tightened to ensure the stability of the sleeve 1 and the electrode rod 15. Finally, the protective shell 9 is placed in the inner groove in the sleeve 1, and the resistance spot welding equipment directly applies the electrode pressure to the pressure transmitter 301. The strain gauge 302 and the strain compensator 303 convert the measured pressure value into an electrical signal and transmit it to the display device 4. The display device 4 records and analyzes the measured data and displays the pressure value.

[0058] The specific testing process is as follows:

[0059] Use a vernier caliper to measure the relevant dimensions of the electrode rod 15 on the resistance spot welding equipment. After measurement, the diameter of the upper end of the electrode rod 15 is 20mm, the diameter of the lower end is 24mm, and the electrode rod 15 is conical. Select a non-slip pad 5 with a thickness of 1.5mm to assemble it to the inner wall of the sleeve 1, and put it on the electrode rod 15. Use the laser locator 13 to cooperate with the screw sleeve 204 to locate the plane to be measured, and use the adjusting bolt 14 or the adjusting rod 17 to cooperate with the screw sleeve 204 to fasten the sleeve 1 to the electrode rod 15. Put the protective shell 9 into the installation groove 8. Set the equipment electrode pressure to 10KN, use the electrode rod 15 to apply the electrode pressure, and record the electrode pressure corresponding to the upper and lower electrode rods 15 when they are closed. 9.95KN, with an error of 5‰. Use the same method to set the electrode pressure to 9KN and 11KN, and measure the actual electrode pressure, which are 9.05KN and 10.98KN, respectively, with errors of 6‰ and 2‰, respectively.

[0060] The testing method of the electrode pressure measuring device provided by the present invention has the beneficial effect that, compared with the prior art, in the testing method of the electrode pressure measuring device of the present invention, the electrode rod 15 is inserted into the sleeve 1 from bottom to top, and the upper end of the electrode rod 15 is against the pressure detection component 3, the pressure detection component 3 is electrically connected to the display device 4, and the electrode rod 15 is fixed by the positioning component 2, so that the electrode rod 15 remains stable. The pressure detection component 3 senses the electrode pressure of the electrode rod 15, generates an electrical signal and transmits it to the display device 4, and the display device 4 converts the electrical signal into a numerical signal and displays it. It solves the problem of not needing to hold the operation when measuring the electrode pressure, and the operation stability is good, which improves the accuracy and reliability of the measurement data, and will not cause harm to the operator.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrode pressure measuring device, characterized in that: include: A sleeve, wherein a receiving cavity for receiving the electrode rod is formed inside; A positioning assembly, arranged on the sleeve; A pressure detection assembly, disposed on the upper portion of the sleeve, for detecting the pressure of the electrode rod, wherein the pressure detection assembly is electrically connected to a display device; The electrode rod is pressed into the accommodating cavity by the positioning assembly, the pressure of the electrode rod is detected by the pressure detection assembly, and the pressure value is displayed by the display device; The positioning component comprises: A conical sleeve is fixedly arranged at the lower end of the sleeve, and its inner cavity is communicated with the accommodating cavity, and is used to accommodate the electrode rod. The outer diameter of the conical sleeve gradually decreases from top to bottom, and a plurality of notches are opened in the circumferential direction of the lower end of the conical sleeve. The plurality of notches divide the lower end of the conical sleeve into a plurality of pressing plates for pressing the electrode rod; A screw sleeve, threadedly sleeved on the outer wall of the tapered sleeve; When the screw sleeve rotates and rises along the outer wall of the conical sleeve, the screw sleeve is used to apply pressure to the multiple pressing plates to press the electrode rod; when the screw sleeve rotates and descends along the outer wall of the conical sleeve, the screw sleeve releases the pressure of the multiple pressing plates to loosen the electrode rod; The pressure detection component comprises: The pressure transmitter is arranged on the upper part of the sleeve and is electrically connected to the display device. A strain gauge is arranged on one side of the pressure transmitter, and a strain compensator is installed on the lower end surface to abut against the electrode rod.

2. The electrode pressure measuring device according to claim 1, characterized in that: The inner side wall of the conical sleeve is provided with an anti-skid pad, and the plurality of pressing plates are used to press the electrode rods through the anti-skid pad.

3. The electrode pressure measuring device according to claim 2, characterized in that: A tray for placing the display device is provided on one side of the sleeve, and the tray is connected to the sleeve via a connecting rod.

4. The electrode pressure measuring device according to claim 3, characterized in that: The upper end surface of the sleeve is provided with a mounting groove which is in communication with the accommodating cavity, a protective shell is placed in the mounting groove, and the pressure detection assembly is arranged in the protective shell.

5. The electrode pressure measuring device according to claim 4, characterized in that: The pressure detection component is electrically connected to the display device via a wire, and a clearance groove for passing the wire is provided on one side of the installation groove.

6. The electrode pressure measuring device according to claim 5, characterized in that: A through hole communicating with the accommodating cavity is provided on the side wall of the sleeve, and a laser locator is installed on the side wall of the sleeve. The laser locator observes the position of the upper end surface of the electrode rod through the through hole.

7. The electrode pressure measuring device according to claim 6, characterized in that: The electrode pressure measuring device also includes: A plurality of adjusting bolts are evenly distributed around the circumference of the sleeve and penetrate through the side wall of the sleeve, and are used to press against the electrode rod to adjust the verticality of the electrode rod.

8. A method for testing an electrode pressure measuring device, using the electrode pressure measuring device as claimed in claim 7, characterized in that: The following steps are involved: The anti-skid pad is installed in the conical sleeve at the lower part of the sleeve, and the electrode rod passes through the conical sleeve from bottom to top and enters the sleeve, and the upper end surface of the electrode rod is level with the bottom surface of the installation groove, and the screw sleeve on the conical sleeve is rotated, and the multiple pressing plates of the conical sleeve are bent inward, and the side wall of the electrode rod is pressed tightly through the anti-skid pad; Rotate a plurality of adjusting bolts, so that the plurality of adjusting bolts simultaneously press against the side wall of the electrode rod, and adjust the electrode rod so that the electrode rod and the sleeve are coaxial; The pressure transmitter is installed in the installation groove, and the display device is installed on the tray. The strain compensator is against the upper end surface of the electrode rod. The strain meter and the strain compensator are used to measure the pressure value of the upper end surface of the electrode rod, and the pressure value is converted into an electrical signal by the pressure transmitter and transmitted to the display device to display the pressure value.

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