Strength testing device for flux-cored wire

Abstract

The invention provides a flux-cored wire strength testing device, and relates to the field of flux-cored wire strength test.The flux-cored wire strength testing device comprises a testing assembly, the testing assembly is composed of a positioning mechanism and a force applying mechanism, the force applying mechanism can apply testing tension to a flux-cored wire, and therefore the tensile strength test of the flux-cored wire is achieved; the force application mechanism has an automatic compensation function, and when the flux-cored wire deforms and extends in the testing process, the force application mechanism can automatically compensate the testing tension, so that the lifting curve of the testing tension is smooth, meanwhile, the tension acting on the flux-cored wire is ensured to be stably increased all the time, the testing is stable and accurate, and the testing efficiency is improved. The tensile strength testing device solves the problems that the tensile strength testing device of the flux-cored wire is not provided with a pressure compensation structure, and the flux-cored wire is elongated and deformed due to tensile force during tensile force testing, so that the tensile force value loaded on the flux-cored wire is reduced, and the accuracy of a testing result is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of flux-cored welding wire strength testing, and in particular to a flux-cored welding wire strength testing device. Background Art

[0002] Flux-cored welding wire is a key filling material in the welding field. Its structure is made of thin steel strip rolled into a round or special-shaped steel tube, which is filled with specific powder. This unique structure gives it the advantages of high welding efficiency and good weld quality, making it widely used in many industries such as petroleum, chemical industry, construction and machinery manufacturing. Flux-cored welding wire needs to be strength tested during production, and tensile strength test is one of the strength tests. If the tensile strength of the flux-cored welding wire is insufficient, the flux-cored welding wire is prone to breakage, powder leakage and other problems during use, which will not only cause the product to be scrapped, but also affect the quality of subsequent welding operations after entering the market.

[0003] As for the current tensile strength testing device for flux-cored welding wire, it has no structure to compensate for pressure during testing. Flux-cored welding wire is generally in the form of long strips. This results in the flux-cored welding wire being stretched and deformed due to the tensile force during the tensile test, thereby causing the tensile force value loaded on the welding wire to decrease, and the tensile force increase curve to be uneven. The tensile force during the test is also prone to fluctuations, which affects the accuracy of the test results and has poor practicality. Summary of the invention

[0004] The invention relates to a strength testing device for a flux-cored welding wire, which comprises a testing component, wherein a positioning mechanism can realize positioning and tightening of two ends of the flux-cored welding wire to be tested, the installation and removal of the flux-cored welding wire is convenient and flexible, a force-applying mechanism can apply a test tension to the flux-cored welding wire, thereby realizing a tensile strength test of the flux-cored welding wire, and the force-applying mechanism has an automatic compensation function. When the flux-cored welding wire is deformed and elongated during the test, the force-applying mechanism can automatically compensate for the test tension, so that the test tension lifting curve is smooth, and at the same time, it is ensured that the tension acting on the flux-cored welding wire is always stably increased, the test is stable and accurate, and the flexibility and practicality are extremely strong.

[0005] The present invention provides a strength test device for flux-cored welding wire, specifically comprising: a seat assembly and a test assembly, wherein the seat assembly comprises a fixed base, a mounting column, a driving motor and a driving rod, wherein the mounting column is fixedly mounted on the top of the fixed base, and the driving motor is fixedly mounted on the top of the mounting column, the driving rod is rotatably connected to the inside of the mounting column, and the top end of the driving rod is transmission-connected to the rotating shaft of the driving motor, and the test assembly is composed of a positioning mechanism and a force-applying mechanism; The positioning mechanism includes a winding roller and an electric push rod, the winding roller is rotatably connected to the top of the fixed base, and the electric push rod is fixedly installed on the top of the fixed base, the roller body of the winding roller is installed with a welding wire clamp a, and one end of the push rod of the electric push rod is fixedly installed with a welding wire clamp b; the force-applying mechanism includes a driving seat, a force-applying seat, a connecting seat and a synchronization rod, the driving seat, the force-applying seat and the connecting seat are sequentially inserted into the side of the mounting column from top to bottom, and the synchronization rod is rotatably connected to the bottom of the driving seat.

[0006] Furthermore, the rod body of the driving rod is provided with threads on the outside, and the driving rod is screwed to the inside of the driving seat through the rod body threads, and the rod body of the driving rod passes through the inside of the force application seat and the connecting seat.

[0007] Furthermore, a resistance block is provided at the top of the connecting seat, and the resistance block resists the bottom of the force applying seat. A test tension spring is provided at the bottom of the force applying seat, and two ends of the test tension spring are respectively fixedly connected to the top of the connecting seat and the bottom of the force applying seat.

[0008] Furthermore, the seat body assembly also includes a compensation rod, and the compensation rod is rotatably connected to the top of the fixed base. The outside of the rod body of the compensation rod is provided with a spiral compensation groove, and the inside of the connecting seat is provided with a compensation protrusion, which is inserted into the inside of the compensation groove.

[0009] Furthermore, a linkage rod with a regular polygonal cross section is provided at the bottom of the synchronization rod, and a linkage groove is provided inside the compensation rod, and the linkage rod is inserted into the linkage groove.

[0010] Furthermore, a spiral synchronizing groove is provided on the outside of the synchronizing rod, and a synchronizing protrusion is provided on the inside of the force applying seat, and the synchronizing protrusion is inserted into the inside of the synchronizing groove.

[0011] Furthermore, a connecting rack is provided on the bottom side of the connecting seat, and a connecting gear is provided on the outside of the rotating shaft of the winding roller, and the connecting gear and the connecting rack are meshed for transmission.

[0012] Furthermore, the positioning mechanism also includes an angle sensor, and the angle sensor is fixedly installed on the top of the fixed base, and the angle sensor can monitor and record the rotation angle of the winding roller.

[0013] The present invention provides a strength testing device for flux-cored welding wire, which has the following beneficial effects: The positioning mechanism can achieve the positioning and tensioning of both ends of the flux-cored wire to be tested, and the installation and removal of the flux-cored wire are convenient and flexible. The force application mechanism can apply a test tension to the flux-cored wire, thereby realizing the tensile strength test of the flux-cored wire. Moreover, the force application mechanism has an automatic compensation function. When the flux-cored wire deforms and elongates during the test, the force application mechanism can automatically compensate the test tension, making the test tension increase curve smooth. At the same time, it also ensures that the tension acting on the flux-cored wire always increases stably, the test is stable and accurate, and the flexibility and adaptability of the device are improved. Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0015] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0016] In the drawings: Figure 1 The structural schematic diagram of the present invention is shown.

[0017] Figure 2 The internal structural schematic diagram when the flux-cored wire to be tested of the present invention is installed on the positioning mechanism is shown.

[0018] Figure 3 The present invention is shown Figure 2 The enlarged structural schematic diagram of part A in the present invention is shown.

[0019] Figure 4 The structural schematic diagram after disassembling the seat body assembly and the positioning mechanism of the present invention is shown.

[0020] Figure 5 The structural schematic diagram after disassembling the force application mechanism of the present invention is shown.

[0021] Figure 6 The internal structural schematic diagram when the flux-cored wire does not elongate during the test of the present invention is shown.

[0022] Figure 7 The internal structural schematic diagram when the flux-cored wire is elongated during the test of the present invention is shown.

[0023] Figure 8 The present invention is shown Figure 7 The enlarged structural schematic diagram of part B in the present invention is shown.

[0024] List of Reference Numerals 1. Seat body assembly; 101. Fixed base; 102. Installation column; 103. Driving motor; 104. Driving rod; 105. Compensation rod; 1051. Compensation groove; 1052. Linkage groove; 2. Positioning mechanism; 201. Winding roller; 2011. Connecting gear; 202. Electric push rod; 203. Angle sensor; 3. Force application mechanism; 301. Driving seat; 302. Force application seat; 3021. Test tension spring; 3022. Synchronization protrusion; 303. Connecting seat; 3031. Contact block; 3032. Compensation protrusion; 3033. Connecting rack; 304. Synchronization rod; 3041. Linking rod; 3042. Synchronization groove; 4. Welding wire fixture a 5. Welding wire fixture b Specific implementation manner

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0026] Please refer to Figures 1 to 8 : Embodiment 1: The present invention provides a strength testing device for flux-cored wire, comprising: a base assembly 1 and a testing assembly. The base assembly 1 includes a fixed base 101, a mounting column 102, a driving motor 103, a driving rod 104 and a compensation rod 105. The mounting column 102 is fixedly installed on the top of the fixed base 101, and the driving motor 103 is fixedly installed on the top of the mounting column 102. The driving rod 104 is rotatably connected inside the mounting column 102, and the top end of the driving rod 104 is in transmission connection with the rotating shaft of the driving motor 103. The compensation rod 105 is rotatably connected to the top of the fixed base 101. The testing assembly is composed of a positioning mechanism 2 and a force application mechanism 3; The positioning mechanism 2 includes a winding roller 201 and an electric push rod 202. The winding roller 201 is rotatably connected to the top of the fixed base 101, and the electric push rod 202 is fixedly installed on the top of the fixed base 101. A welding wire fixture a 4 is installed on the roller body of the winding roller 201, and a welding wire fixture b 5 is fixedly installed at one end of the push rod of the electric push rod 202. The force application mechanism 3 includes a driving seat 301, a force application seat 302, a connecting seat 303 and a synchronization rod 304. The driving seat 301, the force application seat 302 and the connecting seat 303 are sequentially inserted into the side of the mounting column 102 from top to bottom, and the synchronization rod 304 is rotatably connected to the bottom of the driving seat 301.

[0027] Among them, a connecting rack 3033 is provided on the bottom side of the connecting seat 303, and a connecting gear 2011 is provided outside the rotating shaft of the winding roller 201. The teeth of the connecting gear 2011 and the connecting rack 3033 are meshed and driven. During use, both ends of the to-be-tested flux-cored wire can be respectively fixed inside the wire clamp a4 and the wire clamp b5. By controlling the telescopic movement of the electric push rod 202, the operation of tightening the to-be-tested flux-cored wire can be realized, which is convenient for the subsequent test assembly. Moreover, the winding roller 201 cannot rotate clockwise when the connecting seat 303 is in the lowest use position, so that the operation of tightening the flux-cored wire can be stably realized, and the use is convenient and flexible.

[0028] Among them, a thread is provided on the outer body of the driving rod 104, and the driving rod 104 is screwed inside the driving seat 301 through the thread on the rod body. The rod body of the driving rod 104 passes through the inside of the force application seat 302 and the connecting seat 303. During use, the tensile strength test of the flux-cored wire can be realized through the force application mechanism 3. After the flux-cored wire is tightened, the driving motor 103 is driven to drive the driving seat 301 to move upward. When the driving motor 103 rotates, it can drive the driving rod 104 to rotate. When the driving rod 104 rotates, it can drive the driving seat 301 to move through the thread on the rod body. Thus, by changing the rotation direction of the driving motor 103, the up and down movement of the driving seat 301 inside the mounting column 102 can be realized. When the driving seat 301 moves upward, it can drive the synchronous rod 304 to move upward synchronously. A synchronizing groove 3042 with a spiral shape is provided on the outer part of the synchronous rod 304, and a synchronous protrusion 3022 is provided inside the force application seat 302. The synchronous protrusion 3022 is inserted into the synchronous groove 3042. When the synchronous rod 304 moves upward, the bottom end of the groove body of the synchronous groove 3042 can drive the force application seat 302 to move upward synchronously through the synchronous protrusion 3022. A contact block 3031 is provided on the top of the connecting seat 303, and the contact block 3031 abuts against the bottom of the force application seat 302. A test tension spring 3021 is provided at the bottom of the force application seat 302, and both ends of the test tension spring 3021 are respectively fixedly connected to the top of the connecting seat 303 and the bottom of the force application seat 302. When the force application seat 302 moves upward, it can stretch the test tension spring 3021, so as to transmit the tension of the test tension spring 3021 to the connecting seat 303, making the connecting seat 303 have a tendency to move upward. The connecting seat 303 can, under the combined action of the connecting rack 3033 and the connecting gear 2011, transmit the tension to the winding roller 201, making the winding roller 201 have a tendency to rotate counterclockwise, so as to realize the use of the tensile strength test of the flux-cored wire. Moreover, as the force application seat 302 continues to move upward, the test tension spring 3021 will also continue to be stretched, thereby increasing the test tension of the flux-cored wire. The test is convenient and flexible. After a single test is completed, after controlling the driving seat 301 to move downward and reset, and removing the flux-cored wire, the tensile strength test of the subsequent to-be-tested flux-cored wire can be continued, and the use is convenient and flexible.

[0029] Among them, a compensation groove 1051 with a spiral direction is provided on the outer part of the rod body of the compensation rod 105, and a compensation protrusion 3032 is provided inside the connecting seat 303. The compensation protrusion 3032 is inserted into the compensation groove 1051. During use, the force application mechanism 3 has an automatic compensation function. That is, when the flux-cored wire is stretched and lengthened under tension, the pulling force exerted by the force application mechanism 3 on the flux-cored wire will not decrease, but will continuously increase, ensuring the smoothness of the pulling force curve and improving the accuracy of the test results. When the flux-cored wire is stretched and lengthened under tension, the winding roller 201 will rotate counterclockwise. When the winding roller 201 rotates counterclockwise, the connecting gear 2011 can drive the connecting seat 303 to move upward through the connecting rack 3033, avoiding the jamming of the device. When the connecting seat 303 moves upward, the compensation protrusion 3032 can drive the compensation rod 105 to rotate through the compensation groove 1051. A linkage rod 3041 with a regular polygon cross-section is provided at the bottom of the synchronizing rod 304, and a linkage groove 1052 is provided inside the compensation rod 105. The linkage rod 3041 is inserted into the linkage groove 1052. When the compensation rod 105 rotates, the linkage groove 1052 can drive the synchronizing rod 304 to rotate synchronously through the linkage rod 3041. When the synchronizing rod 304 rotates, the synchronizing groove 3042 can drive the force application seat 302 to move upward through the synchronizing protrusion 3022, and the force application seat 302 and the connecting seat 303 are synchronous, in the same direction and with the same displacement. Therefore, when the flux-cored wire is stretched and lengthened under tension, the working distance between the force application seat 302 and the connecting seat 303 will not become smaller, that is, the test tension spring 3021 will not contract and reduce the test pulling force. At the same time, under the combined action of the synchronizing groove 3042 and the synchronizing protrusion 3022, the driving seat 301 can still drive the force application seat 302 to move upward through the synchronizing rod 304, so as to continuously increase the test pressure and ensure the smooth and stable test pulling force curve.

[0030] Among them, the positioning mechanism 2 further includes an angle sensor 203, and the angle sensor 203 is fixedly installed on the top of the fixed base 101. The angle sensor 203 can monitor and record the rotation angle of the winding roller 201. During use, the angle sensor 203 can monitor the angle change of the winding roller 201 during the test, so that the deformation elongation of the flux-cored wire during the test can be obtained through calculation. The test data is diverse, further improving the flexibility of the device.

[0031] Specific usage method and function of this embodiment: In the present invention, both ends of the core wire to be tested can be respectively fixed inside the wire clamp a4 and the wire clamp b5. By controlling the telescopic movement of the electric push rod 202, the operation of tightening the core wire to be tested can be achieved, which is convenient for the subsequent test components. Moreover, the winding roller 201 cannot rotate clockwise when the connecting seat 303 is in the lowest usage position, so that the operation of tightening the core wire can be stably realized. The tensile strength test of the core wire can be achieved through the force application mechanism 3. After the core wire is tightened, the driving motor 103 can be driven to drive the driving seat 301 to move upward. When the driving motor 103 rotates, it can drive the driving rod 104 to rotate. When the driving rod 104 rotates, it can drive the driving seat 301 to move through the rod body thread. Thus, by changing the rotation direction of the driving motor 103, the up and down movement of the driving seat 301 inside the installation column 102 can be realized. When the driving seat 301 moves upward, it can drive the synchronous rod 304 to move upward synchronously. When the synchronous rod 304 moves upward, the bottom end of the groove body of the synchronous groove 3042 can drive the force application seat 302 to move upward synchronously through the synchronous protrusion 3022. When the force application seat 302 moves upward, it can stretch the test tension spring 3021, so as to transmit the tension of the test tension spring 3021 to the connecting seat 303, making the connecting seat 303 have a tendency to move upward. The connecting seat 303 can, under the combined action of the connecting rack 3033 and the connecting gear 2011, transmit the tension to the winding roller 201, making the winding roller 201 have a tendency to rotate counterclockwise, so as to realize the tensile strength test of the core wire. And as the force application seat 302 continues to move upward, the test tension spring 3021 will also continue to be stretched, thereby increasing the test tension of the core wire. The test is convenient and flexible. After a single test is completed, after controlling the driving seat 301 to move downward and reset, and removing the core wire, the tensile strength test of the subsequent core wire to be tested can be continued. The force application mechanism 3 has an automatic compensation function, that is, when the core wire becomes longer under tension, the tension applied by the force application mechanism 3 on the core wire will not decrease, but will continue to increase, ensuring the smoothness of the tension curve and improving the accuracy of the test results. When the core wire becomes longer under tension, the winding roller 201 will rotate counterclockwise. When the winding roller 201 rotates counterclockwise, the connecting gear 2011 can drive the connecting seat 303 to move upward through the connecting rack 3033, avoiding the jamming of the device. When the connecting seat 303 moves upward, the compensation protrusion 3032 can drive the compensation rod 105 to rotate through the compensation groove 1051. When the compensation rod 105 rotates, the linkage groove 1052 can drive the synchronous rod 304 to rotate synchronously through the linkage rod 3041. When the synchronous rod 304 rotates, the synchronous groove 3042 can drive the force application seat 302 to move upward through the synchronous protrusion 3022. And the force application seat 302 and the connecting seat 303 are synchronous, in the same direction and with the same displacement. Thus, when the core wire becomes longer under tension, the usage distance between the force application seat 302 and the connecting seat 303 will not become smaller.That is, the test tension spring 3021 will not shrink to reduce the test tension. At the same time, under the cooperation of the synchronization groove 3042 and the synchronization protrusion 3022, the driving seat 301 can still drive the force seat 302 to move upward through the synchronization rod 304, thereby continuously increasing the test pressure and ensuring that the test tension curve is smooth and stable. In order to facilitate the understanding of the above working principle, a fixed tension value is set as Fa, and when Fa is reached, the distance between the force seat 302 and the connecting seat 303 is Da. When the flux-cored welding wire is stretched and lengthened, the upward movement distance of the connecting seat 303 is Db. Since the displacement distances of the force seat 302 and the connecting seat 303 are the same, the upward movement distance of the force seat 302 is also Db, so that the distance between the force seat 302 and the connecting seat 303 is Da-Db+Db =Da, that is, the distance between the force-applying seat 302 and the connecting seat 303 does not change. This design ensures that when the flux-cored welding wire is stretched and lengthened during the test, Fa will not change. When used with the continuously upward-moving driving seat 301, a stable and smooth test of the tension can be achieved. The angle sensor 203 can monitor the angle change of the winding roller 201 during the test, so that the deformation and elongation of the flux-cored welding wire during the test can be obtained after calculation.

[0032] In another embodiment, a displacement sensor for monitoring the distance between the force applying seat 302 and the connecting seat 303 is installed at the bottom of the force applying seat 302. The displacement sensor can monitor the change in the distance between the force applying seat 302 and the connecting seat 303 in real time. The change in the distance between the force applying seat 302 and the connecting seat 303 is the deformation of the test tension spring 3021, so that the test tension value can be known and adjusted in real time.

Claims

1. A strength testing device for flux-cored welding wire, characterized in that: include: A seat assembly (1) and a test assembly, wherein the seat assembly (1) comprises a fixed base (101), a mounting column (102), a drive motor (103) and a drive rod (104), wherein the mounting column (102) is fixedly mounted on the top of the fixed base (101), and the drive motor (103) is fixedly mounted on the top of the mounting column (102), and the drive rod (104) is rotatably connected to the inside of the mounting column (102), and the top end of the drive rod (104) is drivingly connected to the rotating shaft of the drive motor (103), and the test assembly is composed of a positioning mechanism (2) and a force applying mechanism (3); The positioning mechanism (2) comprises a winding roller (201) and an electric push rod (202); the winding roller (201) is rotatably connected to the top of the fixed base (101), and the electric push rod (202) is fixedly mounted on the top of the fixed base (101); a welding wire clamp a (4) is mounted on the roller body of the winding roller (201), and a welding wire clamp b (5) is fixedly mounted on one end of the push rod of the electric push rod (202); the force applying mechanism (3) comprises a driving seat (301), a force applying seat (302), a connecting seat (303) and a synchronization rod (304); the driving seat (301), the force applying seat (302) and the connecting seat (303) are sequentially plugged into the side of the mounting column (102) from top to bottom, and the synchronization rod (304) is rotatably connected to the bottom of the driving seat (301).

2. A strength testing device for flux-cored welding wire according to claim 1, characterized in that: The rod body of the driving rod (104) is provided with threads on the outside, and the driving rod (104) is screwed to the inside of the driving seat (301) through the rod body threads, and the rod body of the driving rod (104) passes through the inside of the force application seat (302) and the connecting seat (303).

3. The strength testing device for flux-cored welding wire according to claim 1, characterized in that: The top of the connecting seat (303) is provided with a resistance block (3031), and the resistance block (3031) resists the bottom of the force applying seat (302). The bottom of the force applying seat (302) is provided with a test tension spring (3021), and the two ends of the test tension spring (3021) are respectively fixedly connected to the top of the connecting seat (303) and the bottom of the force applying seat (302).

4. The strength testing device for flux-cored welding wire according to claim 1, characterized in that: The seat assembly (1) further comprises a compensation rod (105), and the compensation rod (105) is rotatably connected to the top of the fixed base (101), the rod body of the compensation rod (105) is provided with a spiral compensation groove (1051) on the outside, and the connecting seat (303) is provided with a compensation protrusion (3032) on the inside, and the compensation protrusion (3032) is inserted into the inside of the compensation groove (1051).

5. A flux-cored welding wire strength testing device according to claim 4, characterized in that: A linkage rod (3041) having a regular polygonal cross section is provided at the bottom of the synchronization rod (304), and a linkage groove (1052) is provided inside the compensation rod (105), and the linkage rod (3041) is inserted into the linkage groove (1052).

6. A flux-cored welding wire strength testing device according to claim 5, characterized in that: The exterior of the synchronization rod (304) is provided with a spiral synchronization groove (3042), and the interior of the force application seat (302) is provided with a synchronization protrusion (3022), and the synchronization protrusion (3022) is inserted into the interior of the synchronization groove (3042).

7. The strength testing device for flux-cored welding wire according to claim 1, characterized in that: A connecting rack (3033) is provided on the bottom side of the connecting seat (303), and a connecting gear (2011) is provided on the outside of the rotating shaft of the winding roller (201), and the connecting gear (2011) and the connecting rack (3033) are gear-engaged for transmission.

8. The strength testing device for flux-cored welding wire according to claim 1, characterized in that: The positioning mechanism (2) further comprises an angle sensor (203), and the angle sensor (203) is fixedly mounted on the top of the fixed base (101), and the angle sensor (203) is capable of monitoring and recording the rotation angle of the winding roller (201).

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