A strength testing device for flux-cored welding wire

Abstract

This invention provides a strength testing device for flux-cored welding wire, relating to the field of flux-cored welding wire strength testing. The device includes a testing assembly comprising a positioning mechanism and a force-applying mechanism. The force-applying mechanism applies a test tensile force to the flux-cored welding wire, thereby achieving tensile strength testing. The force-applying mechanism has an automatic compensation function; when the flux-cored welding wire deforms and elongates during testing, the force-applying mechanism automatically compensates for the test tensile force, resulting in a smooth test tensile force increase curve. This also ensures that the tensile force acting on the flux-cored welding wire consistently increases steadily, ensuring stable and accurate testing. This invention solves the problem that existing flux-cored welding wire tensile strength testing devices lack a compensating pressure structure, causing the flux-cored welding wire to elongate and deform during tensile testing, leading to a decrease in the tensile force value on the welding wire and affecting the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of flux-cored wire strength testing technology, and in particular to a strength testing device for flux-cored wire. Background Technology

[0002] Flux-cored welding wire, as a key filler material in the welding field, is structurally made of thin steel strips rolled into round or irregularly shaped steel tubes, filled with specific flux powder. This unique structure gives it the advantages of high welding efficiency and excellent weld quality, making it widely used in many industries such as petroleum, chemical, construction, and machinery manufacturing. Flux-cored welding wire needs to undergo strength testing during production, among which tensile strength testing is one type of strength test. If the tensile strength of the flux-cored welding wire is insufficient, problems such as breakage and flux leakage are likely to occur during use, which will not only lead to product scrap but also affect the quality of subsequent welding operations after entering the market.

[0003] Currently, the tensile strength testing devices for flux-cored welding wires lack a pressure compensation structure during testing. Since flux-cored welding wires are generally long and thin, they tend to elongate and deform under tension during testing, resulting in a decrease in the tensile force on the wire. This leads to an uneven tensile force curve, fluctuations in the tensile force during testing, and reduced accuracy of the test results, making the devices less practical. Summary of the Invention

[0004] This invention relates to a strength testing device for flux-cored welding wire, which includes a testing component. The positioning mechanism can position and tighten both ends of the flux-cored welding wire to be tested, allowing for convenient and flexible installation and removal of the wire. The force-applying mechanism can apply a test tensile force to the flux-cored welding wire, thereby achieving tensile strength testing. Furthermore, the force-applying mechanism has an automatic compensation function; when the flux-cored welding wire undergoes deformation and elongation during the test, the force-applying mechanism can automatically compensate for the test tensile force, resulting in a smooth test tensile force increase curve. This also ensures that the tensile force acting on the flux-cored welding wire consistently increases steadily, ensuring stable and accurate testing with high flexibility and practicality.

[0005] This invention provides a strength testing device for flux-cored welding wire, specifically including: a base assembly and a testing assembly. The base assembly includes a fixed base, a mounting column, a drive motor, and a drive rod. The mounting column is fixedly installed on the top of the fixed base, and the drive motor is fixedly installed on the top of the mounting column. The drive rod is rotatably connected inside the mounting column, and the top end of the drive rod is drively connected to the rotating shaft of the drive motor. The testing assembly consists of a positioning mechanism and a force application mechanism.

[0006] 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. A welding wire clamp a is installed on the roller body of the winding roller, and a welding wire clamp b is fixedly installed on one end of the push rod of the electric push rod. The force application mechanism includes a drive seat, a force application seat, a connecting seat, and a synchronizing rod. The drive seat, the force application seat, and the connecting seat are sequentially inserted into the side of the mounting column from top to bottom, and the synchronizing rod is rotatably connected to the bottom of the drive seat.

[0007] Furthermore, the drive rod has threads on its exterior and is screwed into the drive seat via these threads. The drive rod passes through the interior of the force application seat and the connecting seat.

[0008] Furthermore, the top of the connecting seat is provided with an abutting block, and the abutting block abuts against the bottom of the force-applying seat. The bottom of the force-applying seat is provided with a test tension spring, and the 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.

[0009] Furthermore, the base assembly also includes a compensation rod, which is rotatably connected to the top of the fixed base. The outside of the compensation rod is provided with a helical 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.

[0010] Furthermore, the bottom of the synchronizing rod is provided with a linkage rod with a regular polygonal cross-section, and the inside of the compensation rod is provided with a linkage groove, into which the linkage rod is inserted.

[0011] Furthermore, the outside of the synchronizing rod is provided with a synchronizing groove with a spiral direction, and the inside of the force-applying seat is provided with a synchronizing protrusion, which is inserted into the inside of the synchronizing groove.

[0012] Furthermore, the bottom side of the connecting seat is provided with a connecting rack, and the outside of the rotating shaft of the winding roller is provided with a connecting gear, and the connecting gear and the connecting rack mesh for transmission.

[0013] Furthermore, the positioning mechanism also includes an angle sensor, which is fixedly mounted on the top of the fixed base. The angle sensor can monitor and record the rotation angle of the winding roller.

[0014] This invention provides a strength testing device for flux-cored welding wire, which has the following beneficial effects:

[0015] The positioning mechanism can position and tighten both ends of the flux-cored wire to be tested, making the installation and removal of the flux-cored wire convenient and flexible. The force application mechanism can apply test tension to the flux-cored wire, thereby realizing the tensile strength test of the flux-cored wire. 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 for 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 steadily, making the test stable and accurate, and improving the flexibility and adaptability of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram:

[0019] Figure 1 A schematic diagram of the structure of the present invention is shown.

[0020] Figure 2 A schematic diagram of the internal structure of the flux-cored welding wire of the present invention when it is installed on the positioning mechanism is shown.

[0021] Figure 3 The present invention is shown. Figure 2 Enlarged structural diagram of part A in the middle.

[0022] Figure 4 A schematic diagram of the disassembled seat assembly and positioning mechanism of the present invention is shown.

[0023] Figure 5 A schematic diagram of the disassembled force-applying mechanism of the present invention is shown.

[0024] Figure 6 The diagram shows the internal structure of the present invention when the flux-cored wire does not elongate during testing.

[0025] Figure 7 This diagram illustrates the internal structure of the flux-cored wire during testing, as shown in the present invention.

[0026] Figure 8 The present invention is shown. Figure 7 Enlarged structural diagram of part B in the middle.

[0027] List of reference numerals

[0028] 1. Base assembly; 101. Fixed base; 102. Mounting column; 103. Drive motor; 104. Drive rod; 105. Compensating rod; 1051. Compensating groove; 1052. Linkage groove;

[0029] 2. Positioning mechanism; 201. Winding roller; 2011. Connecting gear; 202. Electric push rod; 203. Angle sensor;

[0030] 3. Force application mechanism; 301. Drive 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. Linkage rod; 3042. Synchronization groove;

[0031] 4. Welding wire clamp a;

[0032] 5. Welding wire clamp b. Detailed Implementation

[0033] 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. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please refer to Figures 1 to 8 Example 1:

[0035] This invention proposes a strength testing device for flux-cored welding wire, comprising: a base assembly 1 and a testing assembly. The base assembly 1 includes a fixed base 101, a mounting column 102, a drive motor 103, a drive rod 104, and a compensation rod 105. 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. The drive rod 104 is rotatably connected inside the mounting column 102, and the top end of the drive rod 104 is drively connected to the rotating shaft of the drive motor 103. The compensation rod 105 is rotatably connected to the top of the fixed base 101. The testing assembly consists of a positioning mechanism 2 and a force application mechanism 3.

[0036] 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 clamp a4 is installed on the roller body of the winding roller 201, and a welding wire clamp b5 is fixedly installed on one end of the push rod of the electric push rod 202. The force application mechanism 3 includes a drive seat 301, a force application seat 302, a connecting seat 303, and a synchronizing rod 304. The drive 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 synchronizing rod 304 is rotatably connected to the bottom of the drive seat 301.

[0037] The bottom side of the connecting seat 303 is provided with a connecting rack 3033, and the outside of the rotating shaft of the winding roller 201 is provided with a connecting gear 2011. The gear teeth of the connecting gear 2011 and the connecting rack 3033 mesh and drive each other. In use, the two ends of the flux-cored welding wire to be tested can be fixed inside the welding wire clamp a4 and welding wire clamp b5 respectively. The operation of tightening the flux-cored welding wire to be tested can be realized by controlling the extension and retraction of the electric push rod 202, which is convenient for subsequent testing components. The winding roller 201 cannot rotate clockwise when the connecting seat 303 is in the lowest use position, so as to stably realize the tightening operation of the flux-cored welding wire, which is convenient and flexible to use.

[0038] The drive rod 104 has threads on its exterior and is screwed into the drive seat 301 via these threads. The drive rod 104 passes through the force-applying seat 302 and the connecting seat 303. In use, the force-applying mechanism 3 enables tensile strength testing of the flux-cored welding wire. After the flux-cored welding wire is tightened, the drive motor 103 drives the drive seat 301 upwards. When the drive motor 103 rotates, it drives the drive rod 104 to rotate. The rotation of the drive rod 104, through its threads, drives the drive seat 301. The drive seat 301 can move up and down inside the mounting column 102 by changing the rotation direction of the drive motor 103. When the drive seat 301 moves upward, it can drive the synchronous rod 304 to move upward synchronously. The synchronous rod 304 has a spiral synchronous groove 3042 on its outside, and the force-applying seat 302 has a synchronous protrusion 3022 inside. The synchronous protrusion 3022 is inserted into the synchronous groove 3042. When the synchronous rod 304 moves upward, the bottom end of the groove 3042 can be driven by the synchronous protrusion 3022 to move the force-applying seat 302. The force seat 302 moves upward synchronously. The top of the connecting seat 303 is provided with an abutment block 3031, which abuts against the bottom of the force seat 302. The bottom of the force seat 302 is provided with a test tension spring 3021, with both ends of the test tension spring 3021 fixedly connected to the top of the connecting seat 303 and the bottom of the force seat 302, respectively. When the force seat 302 moves upward, it can stretch the test tension spring 3021, thereby transmitting the tension of the test tension spring 3021 to the connecting seat 303, giving the connecting seat 303 an upward tendency. The connecting seat 303 can also... The rack 3033 and the connecting gear 2011 work together to transmit tension to the winding roller 201, causing the winding roller 201 to rotate counterclockwise. This enables the tensile strength test of the flux-cored wire. As the force application seat 302 continues to move upward, the test spring 3021 is also continuously stretched, thereby increasing the test tension of the flux-cored wire. The test is convenient and flexible. After a single test is completed, the drive seat 301 is moved downward to reset, and the flux-cored wire is removed. Then, the tensile strength test can be continued for subsequent flux-cored wires to be tested. The test is convenient and flexible.

[0039] The compensating rod 105 has a spiral-shaped compensating groove 1051 on its outer side, and a compensating protrusion 3032 inside the connecting seat 303. The compensating protrusion 3032 is inserted into the compensating groove 1051. During use, the force-applying mechanism 3 has an automatic compensation function. That is, when the flux-cored wire is stretched, the tension exerted on the flux-cored wire by the force-applying mechanism 3 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 flux-cored wire is stretched, 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, preventing the device from jamming. When the connecting seat 303 moves upward, the compensating protrusion 3032 can drive the compensating rod 105 to rotate through the compensating groove 1051. The bottom of the synchronizing rod 304 has a linkage with a regular polygonal cross-section. The compensating rod 105 has a linkage groove 1052 inside, and the linkage rod 3041 is inserted into the linkage groove 1052. When the compensating 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. 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 welding wire is stretched, the working distance between the force application seat 302 and the connecting seat 303 will not decrease. That is, the test tension spring 3021 will not contract and reduce the test tension. At the same time, under the cooperation of the synchronous groove 3042 and the synchronous protrusion 3022, the drive seat 301 can still drive the force application seat 302 to move upward through the synchronous rod 304, thereby continuously increasing the test pressure and ensuring a smooth and stable test tension curve.

[0040] The positioning mechanism 2 also includes an angle sensor 203, which 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. In use, the angle sensor 203 can monitor the angle change of the winding roller 201 during the test, and thus calculate the deformation elongation of the flux-cored wire during the test. The test data is diverse, which further improves the flexibility of the device.

[0041] The specific usage and function of this embodiment: In this invention, the two ends of the flux-cored welding wire to be tested can be fixed inside the welding wire clamp a4 and welding wire clamp b5 respectively. The operation of tightening the flux-cored welding wire to be tested can be realized by controlling the extension and retraction of the electric push rod 202, which facilitates the subsequent testing components. Moreover, the winding roller 201 cannot rotate clockwise when the connecting seat 303 is in the lowest working position, so as to stably realize the tightening operation of the flux-cored welding wire. The tensile strength test of the flux-cored welding wire can be realized through the force application mechanism 3. After the flux-cored welding wire is tightened, the drive seat 301 can be moved upward by the drive motor 103. When the drive motor 103 rotates, it can drive the drive rod 104 to rotate. When the drive rod 104 rotates, it can drive the drive rod through the thread of the rod body. The moving seat 301 moves, thereby changing the rotation direction of the drive motor 103, which enables the drive seat 301 to move up and down inside the mounting column 102. When the drive seat 301 moves upward, it drives the synchronizing rod 304 to move upward synchronously. When the synchronizing rod 304 moves upward, the bottom end of the synchronizing groove 3042 can drive the force-applying seat 302 to move upward synchronously through the synchronizing protrusion 3022. When the force-applying seat 302 moves upward, it can stretch the test tension spring 3021, thereby transmitting the tension of the test tension spring 3021 to the connecting seat 303, giving the connecting seat 303 a tendency to move upward. The connecting seat 303, in turn, can transmit the tension to the winding roller 201 through the cooperation of the connecting rack 3033 and the connecting gear 2011, so that... The winding roller 201 tends to rotate counterclockwise, thus enabling the tensile strength testing of the flux-cored wire. As the force-applying seat 302 continues to move upward, the test spring 3021 is also continuously stretched, increasing the test tension of the flux-cored wire. The testing is convenient and flexible. After a single test, the drive seat 301 is lowered and reset, and the flux-cored wire is removed, allowing for continued tensile strength testing of subsequent flux-cored wires. The force-applying mechanism 3 has an automatic compensation function; that is, when the flux-cored wire is stretched, the tension exerted on the flux-cored wire by the force-applying mechanism 3 will not decrease but will continue to increase, ensuring a smooth tension curve and improving the accuracy of the test results. When the flux-cored wire is stretched, 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, preventing the device from jamming. When the connecting seat 303 moves upward, the compensating protrusion 3032 can drive the compensating rod 105 to rotate through the compensating groove 1051. When the compensating 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-applying seat 302 to move upward through the synchronizing protrusion 3022. The force-applying seat 302 and the connecting seat 303 are synchronous, in the same direction, and with the same displacement. Therefore, when the flux-cored welding wire is stretched, the working distance between the force-applying seat 302 and the connecting seat 303 will not decrease.That is, the test spring 3021 will not contract to reduce the test tension. At the same time, with the cooperation of the synchronous groove 3042 and the synchronous protrusion 3022, the drive seat 301 can still drive the force application seat 302 to move upward through the synchronous rod 304, thereby continuously increasing the test pressure and ensuring a smooth and stable test tension curve. 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 application seat 302 and the connecting seat 303 is Da. When the flux-cored wire is stretched, the upward movement distance of the connecting seat 303 is Db. Since the displacement distances of the force application seat 302 and the connecting seat 303 are the same, the upward movement distance of the force application seat 302 is also Db. Therefore, the distance between the force application seat 302 and the connecting seat 303 at this time is Da-Db+Db. =Da, meaning the distance between the force-applying seat 302 and the connecting seat 303 remains unchanged. This design ensures that Fa does not change when the flux-cored wire is stretched during testing. When used with the continuously rising drive seat 301, it enables stable and smooth force increase testing. The angle sensor 203 monitors the angle change of the winding roller 201 during testing, and the deformation and elongation of the flux-cored wire during testing can be calculated.

[0042] In another embodiment, a displacement sensor is installed at the bottom of the force-applying seat 302 to monitor the distance between the force-applying seat 302 and the connecting seat 303. 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 as to know and adjust the test tension value in real time.

Claims

1. A strength testing apparatus for a flux-cored welding wire, characterized by, Include: The seat body assembly (1) and test assembly, the seat body assembly (1) includes fixed base (101), installation column (102), drive motor (103) and drive rod (104), the installation column (102) is fixedly installed at the top of fixed base (101), and the drive motor (103) is fixedly installed at the top of installation column (102), the drive rod (104) is rotatably connected in the inside of installation column (102), and the top end of drive rod (104) is in transmission connection with the rotating shaft of drive motor (103), the test assembly is composed of positioning mechanism (2) and force applying mechanism (3); The positioning mechanism (2) includes winding roller (201) and electric push rod (202), the winding roller (201) is rotatably connected at the top of fixed base (101), and the electric push rod (202) is fixedly installed at the top of fixed base (101), the roller body of winding roller (201) is provided with welding wire clamp a (4), and one end of the push rod of electric push rod (202) is fixedly installed with welding wire clamp b (5);The force applying mechanism (3) includes drive seat (301), force applying seat (302), connecting seat (303) and synchronous rod (304), the drive seat (301), force applying seat (302) and connecting seat (303) are sequentially inserted from top to bottom on the side of installation column (102), and the synchronous rod (304) is rotatably connected at the bottom of drive seat (301); The seat body assembly (1) further includes compensation rod (105), and the compensation rod (105) is rotatably connected at the top of fixed base (101), the compensation groove (1051) of spiral direction is arranged on the outer portion of the rod body of compensation rod (105), the inside of connecting seat (303) is provided with compensation protrusion (3032), and the compensation protrusion (3032) is inserted into the inside of compensation groove (1051); The bottom of synchronous rod (304) is provided with linkage rod (3041) with a regular polygonal cross section, and the inside of compensation rod (105) is provided with linkage groove (1052), and the linkage rod (3041) is inserted into the inside of linkage groove (1052); The outside of synchronous rod (304) is provided with synchronous groove (3042) of spiral direction, and the inside of force applying seat (302) is provided with synchronous protrusion (3022), and the synchronous protrusion (3022) is inserted into the inside of synchronous groove (3042).

2. A strength testing device for a flux cored welding wire as defined in claim 1, wherein The rod body of drive rod (104) is provided with a screw thread on the outer portion, and the drive rod (104) is screwed into the inside of drive seat (301) through the rod body screw thread, and the rod body of drive rod (104) passes through the inside of force applying seat (302) and connecting seat (303).

3. A strength testing device for a flux cored welding wire as defined in claim 1, wherein The top of connecting seat (303) is provided with abutting block (3031), and the abutting block (3031) abuts against the bottom of force applying seat (302), the bottom of force applying seat (302) is provided with test tension spring (3021), and the two ends of test tension spring (3021) are fixedly connected to the top of connecting seat (303) and the bottom of force applying seat (302) respectively.

4. The strength testing apparatus of claim 1 wherein, The bottom side of the connecting seat (303) is provided with a connecting rack (3033), and the outer part of the rotating shaft of the winding roller (201) is provided with a connecting gear (2011), the gear teeth of the connecting gear (2011) and the connecting rack (3033) are in meshing transmission.

5. The strength testing apparatus of claim 1 wherein, The positioning mechanism (2) further comprises 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 rotating angle of the winding roller (201).

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