A tensile testing machine for welding strip tension testing

Abstract

The application provides a tensile testing machine for welding strip tension test, and belongs to the technical field of tensile testing machines. The tensile testing machine comprises a base, a support fixedly connected to the upper end of the base, and a welding strip locking piece fixedly connected to the other side of the fixing frame. The welding strip locking piece comprises a fastener, which is three elongated fastening strips in an arch shape and has coaxial central axes, and the three elongated fastening strips are arranged equidistantly in the circumferential direction. The fastening unit A comprises a pair of fastening rods A and a fastening rod B arranged alternately, and the pair of fastening rods A each comprises a fastening end A fixedly connected to the middle of one elongated fastening strip at one end, and a traction rod fixedly connected to the other end of the fastening end A at one end. The application solves the problem that the fastener on the existing tensile testing machine for welding strip tension test has a small contact area with the welding strip when fastening the welding strip, and then the end of the welding strip may slide when being pulled, thereby failing to ensure the normal performance of the test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tensile testing machine, and particularly relates to a tensile testing machine for welding strip tensile test. BACKGROUND

[0002] The welding strip is also called tin-plated copper strip or tin-coated copper strip, and is divided into bus bars and interconnection strips, and is applied to the connection between photovoltaic module cell pieces to play an important role of conducting electricity. The welding strip is an important raw material in the welding process of the photovoltaic module, and the quality of the welding strip will directly affect the current collection efficiency of the photovoltaic module, and has a great influence on the power of the photovoltaic module. In the welding strip processing process, the tensile test of the finished product welding strip needs to be carried out to detect the tensile force borne by the welding strip, so as to ensure the reliability, safety and the like of the welding strip in actual application.

[0003] The existing tensile testing machine for welding strip tensile test locks the two ends of the welding strip through a fastener, then pulls the welding strip through a telescopic rod, detects the tensile force borne by the welding strip through a tensile sensor, and transmits the detected tensile force data to a computer. At this time, when the fastener is fastened to the welding strip, the contact area between the fastener and the welding strip is small, and then when the welding strip is pulled, the end of the welding strip may slide, and then the normal test cannot be ensured. SUMMARY

[0004] The present application provides a tensile testing machine for welding strip tensile test, which aims to solve the problem that the fastener on the existing tensile testing machine for welding strip tensile test is fastened to the welding strip, the contact area between the fastener and the welding strip is small, and then when the welding strip is pulled, the end of the welding strip may slide, and then the normal test cannot be ensured.

[0005] The present application provides a tensile testing machine for welding strip tensile test, which aims to solve the problem that the fastener on the existing tensile testing machine for welding strip tensile test is fastened to the welding strip, the contact area between the fastener and the welding strip is small, and then when the welding strip is pulled, the end of the welding strip may slide, and then the normal test cannot be ensured.

[0006] The solder strip locking device comprises: three elongated fastening strips which are arcuate and coaxial, and are circumferentially equidistantly arranged; a fastening unit A comprising a pair of fastening rods A and a fastening rod B which are staggeredly arranged, wherein each of the pair of fastening rods A comprises: a fastening end A which is fixedly connected to a middle of one of the elongated fastening strips; a pulling rod which is fixedly connected to the other end of the fastening end A, and the angle between the pulling rod and the fastening end A is one-third of a circumference, and the angle between the pulling rod of the pair of fastening rods A and the third elongated fastening strip is one-third of a circumference; and the arcuate part of the fastening rod B is fixedly connected to the middle of the third elongated fastening strip and is located below the staggered positions of the pair of pulling rods; and the pair of pulling rods and the fastening rod B are pulled together to move the three elongated fastening strips towards or away from the coaxial line.

[0007] Further, the solder strip locking device further comprises:

[0008] a fastening unit B comprising a pair of fastening rods C and a fastening rod D which are staggeredly arranged, wherein the pair of fastening rods C comprises: a fastening end B which is fixedly connected to a head end of one of the elongated fastening strips; a guide rod which is fixedly connected to the other end of the fastening end B, and the angle between the guide rod and the fastening end B is one-third of a circumference, and the angle between the guide rod of the pair of fastening rods C and the first elongated fastening strip is one-third of a circumference; and the arcuate part of the fastening rod D is fixedly connected to the head end of the first elongated fastening strip and is located below the staggered positions of the pair of guide rods;

[0009] wherein the other end of the guide rod of the pair of fastening rods C and the other end of the fastening rod D are movably connected to the sleeve; the fastening unit B is provided in pairs and is arranged at the top and bottom of the elongated fastening strip, i.e. at the vertical ends of the fastening unit A.

[0010] Further, the solder strip locking device further comprises:

[0011] an assembling frame which is fixedly connected to the fixing frame at one end;

[0012] a linkage unit which is provided in pairs and is mirror-symmetrically arranged at one side of the tail end of the pulling rod of the pair of fastening rods A, wherein a linkage piece A is arranged at the side of the pulling rod close to the linkage unit, and the other side of the linkage piece A is provided with a toothed opening, and the linkage piece A is engaged with the linkage unit;

[0013] a guide disc which is provided in pairs and one guide disc is arranged in each linkage unit so that the pulling rod is located between the guide disc and the linkage unit;

[0014] The traction unit comprises a telescopic rod, a linkage plate B is arranged on both sides of the telescopic rod, the other side of the linkage plate B is provided with a toothed groove, a pair of linkage units are respectively engaged with the linkage plate B on the telescopic rod, the other end of the linkage plate B is fixedly connected with the upper wall of the telescopic rod, and then the pair of traction rods and the linkage plate B are driven together through the telescopic rod.

[0015] The linkage unit, the guide disc, the traction unit and the sleeve are fixedly connected to the assembling frame.

[0016] Further, the traction unit comprises:

[0017] A motor B, a rotating part of the motor B is fixedly connected with a sprocket A;

[0018] A chain, one end of the chain is engaged with the sprocket A on the motor B, and the other end of the chain is engaged with a sprocket B;

[0019] A screw rod, one end of the screw rod is fixedly connected with the sprocket B at the other end of the chain;

[0020] A telescopic rod, the telescopic rod is welded with a screw nut arranged on the screw rod, wherein the extension direction of the linkage plate B is consistent with the axis direction of the screw rod;

[0021] The linkage unit comprises an upper rotating table B and a lower rotating table A arranged thereon, the outer circumferential surface of the rotating table A and the rotating table B is provided with a toothed groove, the rotating table A and the linkage plate B are engaged with each other through the toothed groove, the rotating table B and the linkage plate A on the traction rod are engaged with each other through the toothed groove, the rotating table B and the guide disc are located at the same vertical position, and the traction rod is located between the guide disc and the rotating table B.

[0022] Further, the fastening end A comprises:

[0023] A rectangular end A, one end of the rectangular end A is fixedly connected with the traction rod;

[0024] An arched end A, the wall surface of the arched end A matches the wall surface of the elongated fastening strip and is fixedly connected with the elongated fastening strip, one end of the arched end A is fixedly connected with the other end of the rectangular end A;

[0025] The traction rod comprises a toothed end provided with the linkage plate A and a rectangular end B without the toothed groove, the wall thickness of the rectangular end B is smaller than that of the toothed end, the joint between the toothed end and the rectangular end B is a skew structure, so that when the pair of fastening rods A are staggered, the pair of toothed ends are located at the same vertical position.

[0026] Further, the fastening end B comprises:

[0027] A rectangular end C, one end of the rectangular end C is fixedly connected with the guide rod;

[0028] The arched end B is matched with the outer wall surface of the extended fastening strip and is fixedly connected with the extended fastening strip, and one end of the arched end B is fixedly connected with the other end of the rectangular end C;

[0029] The guide rod comprises a guide end and a rectangular end D which are integrally connected, the wall thickness of the rectangular end D is smaller than that of the guide end, and the connection part of the guide end and the rectangular end D is an inclined structure, so that when the pair of fastening rods C on both sides are staggered, the guide ends of the pair are located at the same vertical position; at this time, the guide ends on both sides are located at the same vertical position and are movably connected with the corresponding sleeves.

[0030] Further, the fastening end B further comprises a guide platform, a pair of guide platforms are symmetrically arranged, each of which is fixedly connected with the upper wall surface of the fastening end B arranged on the top and is fixedly connected with the lower wall surface of the fastening end B arranged on the bottom, and each of the guide platforms comprises a guide end A, a guide end B and a guide end C which are sequentially connected, the inner wall surface of the guide end B is arched and matched with the outer wall surface of the extended fastening strip, the guide end C is a protrusion and is in contact with the side wall of the extended fastening strip, and the guide end A is a rectangular connection end.

[0031] Further, the assembly frame comprises:

[0032] A rectangular platform, one side of the rectangular platform is open, and the fastening member is located at the side of the opening of the rectangular platform;

[0033] A connection platform A is transversely arranged at the middle of the rectangular platform, wherein the motor B is arranged on the top of the connection platform A, the screw rod and the telescopic rod are arranged on the lower plate of the rectangular platform, and the chain is vertically arranged and located at the side of the connection platform A far away from the fastening member;

[0034] A connection platform B is transversely arranged between the connection platform A and the lower plate;

[0035] The guide disc is rotatably connected with the rotating rod A, one end of the rotating rod A is fixedly connected with the connection platform A, and the other end of the rotating rod A is fixedly connected with the connection platform B; the rotating platform A and the rotating platform B are rotatably connected with the rotating rod B, the top of the rotating rod B is fixedly connected with the connection platform A, the rotating rod B penetrates through the connection platform B, the rotating platform B is located between the connection platform A and the connection platform B, the rotating platform A is located below the connection platform B, and the rotating platform A and the linkage piece B are located at the same vertical position.

[0036] Further, the sleeves connected with the fastening rods D arranged on the top are fixedly connected with the upper plate of the rectangular platform, and the sleeves connected with the fastening rods D arranged on the bottom are fixedly connected with the lower plate of the rectangular platform; the inner wall surfaces of the three extended fastening strips are provided with silica gel pieces.

[0037] The beneficial effects of the present application are:

[0038] The fastener of the present application is three elongated fastening strips arranged in an arch shape and sharing a common central axis, and the three elongated fastening strips are arranged equidistantly. When the three elongated fastening strips are collectively pulled towards the central axis, the welding strip can be fastened. The fastening unit A is arranged to include a pair of fastening rods A and a fastening rod B arranged alternately, and the pair of fastening rods A each includes a fastening end A and a pulling rod. When arranged, the angle between the pulling rod and the fastening end A is one third of a circle. The angle between the pulling rod of the pair of fastening rods A and the third elongated fastening strip is also one third of a circle. The arch-shaped part of the fastening rod B is arranged below the intersection of the pair of pulling rods. When the pair of pulling rods and the fastening rod B are collectively pulled, the movement direction of the pair of pulling rods and the movement direction of the fastening rod B are both one third of a circle, thereby ensuring that the three elongated fastening strips move towards or away from the central axis. The fastening unit B is also arranged. The fastening unit B is arranged in pairs and arranged at the top and bottom of the elongated fastening strip. The fastening unit B has a similar structure to the fastening unit A. The difference is that when the fastening unit A pulls the three elongated fastening strips, the guide rod and the fastening rod D of the pair of fastening rods C move along the sleeve, thereby ensuring the accurate movement of the three elongated fastening strips on the movement track. The elongated fastening strip with increased length can firmly fasten the welding strip with the assistance of the pair of fastening units arranged vertically. The linkage unit, the guide disc and the pulling unit can collectively pull the pair of pulling rods and the fastening rod B to move, so that the three elongated fastening strips collectively move towards the central axis. The fastener can fasten the welding strip in multiple directions, so that the contact area between the welding strip and the fastener is increased. When the welding strip is pulled, the fastening of the welding strip is ensured, and the normal operation of the welding strip tension test is ensured.

[0039] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and together with the description serve to explain the present application, but are not intended to limit the present application. In the drawings:

[0041] Figure 1 It is a front view of the structure of the embodiment of the present application;

[0042] Figure 2 It is a perspective view of the welding strip locking piece of the embodiment of the present application;

[0043] Figure 3 It is a schematic view of the internal structure of the welding strip locking piece of the embodiment of the present application;

[0044] Figure 4A top view structural schematic diagram of a fastening unit A of an embodiment of the present application;

[0045] Figure 5 A top view structural schematic diagram of a fastening unit B of an embodiment of the present application;

[0046] Figure 6 A front view structural schematic diagram of a solder strip locking piece of an embodiment of the present application;

[0047] Figure 7 A structural schematic diagram of a fastening rod A of an embodiment of the present application;

[0048] Figure 8 A structural schematic diagram of a guide table of an embodiment of the present application;

[0049] The drawings show that: 1, base; 2, support; 3, machine box; 4, tension sensor; 5, electric telescopic rod; 6, fixing frame; 7, solder strip locking piece; 71, extension fastening strip; 72, fastening unit A; 73, fastening unit B; 74, assembly frame; 75, sleeve; 76, traction unit; 78, guide disc; 79, rotating table B; 710, silica gel piece; 711, rotating table A; 721, fastening rod A; 722, fastening rod B; 7211, rectangular end A; 7212, arch-shaped end A; 7213, rectangular end B; 7214, toothed end; 7215, linkage piece A; 731, fastening rod C; 7311, arch-shaped end B; 7312, rectangular end C; 7313, rectangular end D; 7314, guide end; 732, guide table; 7321, guide end A; 7322, guide end B; 7323, guide end C; 733, fastening rod D; 741, rectangular table; 742, link table A; 743, link table B; 761, motor B; 762, screw rod; 763, telescopic rod; 7631, linkage piece B; 764, chain. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the technical scheme of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. The same reference numerals in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] Reference Figure 1The embodiment of the present application provides a tensile testing machine for welding strip tension test, which comprises a base 1, a support 2 fixedly connected to the upper end of the base 1, a machine box 3 fixedly connected to one side of the support 2, a tensile sensor 4 fixedly connected to the upper end of the base 1 and below the support 2, an electric telescopic rod 5 fixedly connected to the upper end of the support 2, a fixed frame 6 fixedly connected to the lower end of the electric telescopic rod 5 and the upper end of the tensile sensor 4, and a welding strip locking piece 7 fixedly connected to the other side of the fixed frame 6.

[0052] The machine box 3 controls the operation of the whole device, the welding strip locking piece 7 tightly fixes the two ends of the welding strip, the electric telescopic rod 5 pulls the fixed welding strip, the tensile sensor 4 detects the tension borne by the welding strip and transmits the tension to the computer, and the staff counts the data displayed on the computer.

[0053] With reference to Figures 2-8 The welding strip locking piece 7 comprises fastening pieces which are three elongated fastening strips 71 in an arch shape and coaxial with the middle axis, and the three elongated fastening strips 71 are circumferentially equidistantly arranged; a fastening unit A 72 which comprises a pair of fastening rods A 721 and a fastening rod B 722 staggeredly arranged, the pair of fastening rods A 721 each comprises a fastening end A fixedly connected to the middle of one of the elongated fastening strips 71 at one end, and a traction rod fixedly connected to the other end of the fastening end A at one end, and the angle between the traction rod and the fastening end A is one-third of the circumference, and the angle between the traction rod of the pair of fastening rods A 721 and the third elongated fastening strip 71 is one-third of the circumference; the arch-shaped part of the fastening rod B 722 is fixedly connected to the middle of the third elongated fastening strip 71 and below the staggered positions of the pair of traction rods; and the pair of traction rods and the fastening rod B 722 are jointly pulled to move the three elongated fastening strips 71 together towards or away from the middle axis.

[0054] The installed fasteners are three elongated fastening strips 71, which are arched and coaxial, and the three elongated fastening strips 71 are installed equidistantly and can be moved together toward the central axis to fasten the welding strip. The installed fastening unit A72 comprises a pair of fastening rods A721 and a fastening rod B722 installed alternately, and the pair of fastening rods A721 each comprises a fastening end A and a pulling rod, the pair of fastening ends A are respectively connected with one of the elongated fastening strips 71, and then the arched part of the fastening rod B722 is connected with the third elongated fastening strip 71, and the surface of the arched part is matched with the surface of the elongated fastening strip 71. In order to ensure that the three elongated fastening strips 71 can be moved toward the central axis, when installed, the angle between the pulling rod and the fastening end A is one-third of a circle, and when the fastening end A is connected with the elongated fastening strip 71, it is also necessary to ensure that the movement direction of the pulling rod is the same as that of the elongated fastening strip 71, the angle between the pulling rod of the pair of fastening rods A721 and the third elongated fastening strip 71 is one-third of a circle, and the arched part of the fastening rod B722 is arranged below the pair of pulling rods. In this way, when the pair of pulling rods and the fastening rod B722 are pulled together, the movement direction of the pair of pulling rods and the movement direction of the fastening rod B722 are both one-third of a circle, and then it can be ensured that the three elongated fastening strips 71 are moved together toward or away from the central axis, so as to achieve the purpose of fastening and loosening the welding strip.

[0055] The welding strip locking device 7 further comprises:

[0056] The fastening unit B73 comprises a pair of fastening rods C731 and a fastening rod D733 installed alternately, the pair of fastening rods C731 comprises a fastening end B, one end of the fastening end B is connected with the head end of one of the elongated fastening strips 71, a guide rod, one end of the guide rod is connected with the other end of the fastening end B, and the angle between the guide rod and the fastening end B is one-third of a circle, the angle between the guide rod of the pair of fastening rods C731 and the third elongated fastening strip 71 is one-third of a circle, and the arched part of the fastening rod D733 is connected with the head end of the third elongated fastening strip 71 and arranged below the pair of guide rods.

[0057] Among them, the other end of the guide rod of the pair of fastening rods C731 and the other end of the fastening rod D733 are movably connected with the sleeve 75; the fastening unit B73 is provided in pairs, and each is installed at the top and the bottom of the elongated fastening strip 71, that is, at the vertical two ends of the fastening unit A72.

[0058] Also provided are fastening units B73, each of which is provided on the top and bottom of the extended fastening strip 71. The fastening units B73 are similar in structure to the fastening units A72, but differ in that when the fastening units A72 pull the three extended fastening strips 71, the guide rod of the fastening rod C731 and the fastening rod D733 of each fastening unit B73 move along the sleeve 75, thereby ensuring the accurate movement of the three extended fastening strips 71 along the track. The extended fastening strips 71 with increased length can firmly fasten the welding strip with the assistance of the vertical pair of fastening units B73, so that the fastening of the two ends of the extended fastening strips 71 is reduced when the fastening strips 71 are only fastened by the fastening units A72, which can cause the welding strip to fall off during the tensile test.

[0059] The welding strip locking device 7 further comprises:

[0060] an assembly frame 74, one end of which is fixedly connected to the fixed frame 6;

[0061] a linkage unit, each of which is provided on one side of the tail end of the pulling rod A721 of the pair of fastening rods A721, wherein a linkage piece A7215 is provided on the side of the pulling rod close to the linkage unit, and the other side of the linkage piece A7215 is provided with a toothed opening, and the linkage piece A7215 is engaged with the linkage unit;

[0062] a guide disc 78, each of which is provided on the linkage unit, so that the pulling rod is located between the guide disc 78 and the linkage unit;

[0063] a pulling unit 76, which comprises a telescopic rod 763, and a linkage piece B7631 is provided on each side wall of the telescopic rod 763, and the other side of the linkage piece B7631 is provided with a toothed opening, and the linkage piece B7631 of the telescopic rod 763 is engaged with the linkage unit, and the other end of the fastening rod B722 is fixedly connected to the wall surface of the telescopic rod 763, thereby achieving the movement of the pair of pulling rods and the fastening rod B722 through the telescopic rod 763;

[0064] The linkage unit, the guide disc 78, the pulling unit 76, and the sleeve 75 are fixedly connected to the assembly frame 74.

[0065] Since the linkage unit, the guide disc 78, the pulling unit 76, and the sleeve 75 are fixedly connected to the assembly frame 74, when the assembly frame 74 moves, the three extended fastening strips 71 can move with the assembly frame 74, thereby achieving the fastening and loosening of the welding strip by the extended fastening strips 71. During the tensile test of the welding strip, the welding strip can be firmly fastened, thereby ensuring the normal operation of the welding strip test.

[0066] Because the linkage piece A7215 is arranged on one side of the linkage unit close to the pulling rod, the linkage piece A7215 and the linkage unit are engaged, each linkage unit is further provided with a guide disc 78, and the pulling rod is arranged between the guide disc 78 and the linkage unit, so that when the linkage unit operates, the engagement between the linkage unit and the linkage piece A7215 causes the pulling rod to change, and the arrangement of the guide disc 78 can ensure that the pulling rod changes in one direction. In addition, the linkage unit and the guide disc 78 are mirror arranged in a pair, and each linkage unit is engaged with the linkage piece B7631 on the telescopic rod 763, so that when the telescopic rod 763 changes towards the front, the linkage units can be jointly rotated, and the linkage units jointly rotate to cause the pair of pulling rods to change together and to be inclined towards the back by one third of a full angle of the front change, so as to cause the three extended fastening strips 71 to change towards the central axis. When the telescopic rod 763 changes towards the back, the linkage units can be jointly rotated, and the linkage units jointly rotate to cause the pair of pulling rods to change together and to be inclined towards the front by one third of a full angle of the back change, so as to cause the three extended fastening strips 71 to change towards the direction away from the central axis. Because the other end of the fastening rod B722 is fixedly connected to the upper wall of the telescopic rod 763, the fastening rod B722 changes towards a direction with the assistance of the telescopic rod 763, and the pair of pulling rods changes towards a direction with the assistance of the linkage unit. The specification of the linkage piece B7631 is the same as the change of the fastening rod B722 towards a direction.

[0067] The pulling unit 76 comprises:

[0068] The motor B761, and the rotating part of the motor B761 is fixedly connected to the sprocket A;

[0069] The chain 764, one end of the chain 764 is engaged with the sprocket A on the motor B761, and the other end of the chain 764 is engaged with the sprocket B;

[0070] The screw rod 762, one end of the screw rod 762 is fixedly connected to the sprocket B of the other end of the chain 764;

[0071] The telescopic rod 763, the telescopic rod 763 is arranged on the nut of the screw rod 762, and the extension direction of the linkage piece B7631 is consistent with the axis direction of the screw rod 762;

[0072] The linkage unit, the linkage unit comprises the rotating table B79 arranged above and the rotating table A711 arranged below, the outer periphery of the rotating table A711 and the rotating table B79 is provided with a tooth, the rotating table A711 and the linkage piece B7631 are engaged with each other through the tooth, the rotating table B79 and the linkage piece A7215 on the pulling rod are engaged with each other through the tooth, the rotating table B79 and the guide disc 78 are arranged at the same vertical position, and the pulling rod is arranged between the guide disc 78 and the rotating table B79.

[0073] To make the telescopic rod 763 move back and forth to a certain orientation, a screw rod 762 is used. To make the screw rod 762 rotate, a motor B 761 and a chain 764 are used. The linkage unit is arranged as a vertical rotating platform B 79 and a rotating platform A 711, so as to facilitate the vertical staggered arrangement of a pair of fastening rods A 721 and fastening rods B 722, and to facilitate the common traction of the telescopic rod 763 and a pair of traction rods and fastening rods B 722.

[0074] The fastening end A includes:

[0075] The rectangular end A 7211 is connected to one end of the traction rod;

[0076] The arched end A 7212 is matched with the wall surface of the elongated fastening strip 71, and is connected to the elongated fastening strip 71. The arched end A 7212 is connected to the other end of the rectangular end A 7211;

[0077] The traction rod includes a jawed end 7214 connected to the linkage piece A 7215 and a rectangular end B 7213 without a jaw. The wall thickness of the rectangular end B 7213 is smaller than that of the jawed end 7214. The connection between the jawed end 7214 and the rectangular end B 7213 is a skew structure, so that when the pair of fastening rods A 721 are arranged in a staggered manner, the pair of jawed ends 7214 are arranged at the same vertical position.

[0078] To facilitate the secure connection of the fastening end A to the elongated fastening strip 71, the fastening end A is arranged as the rectangular end A 7211 and the arched end A 7212, which can be in contact with the outer wall surface of the elongated fastening strip 71. To facilitate the linkage piece A 7215 on the two traction rods being arranged at the same vertical position, the traction rod is arranged as a whole jawed end 7214 and a rectangular end B 7213, and the wall thickness of the rectangular end B 7213 is smaller than that of the jawed end 7214, so that the pair of fastening rods A 721 are arranged in a staggered manner, and the jawed ends 7214 arranged on both sides are arranged at the same vertical position.

[0079] The fastening end B includes:

[0080] The rectangular end C 7312 is connected to one end of the guide rod;

[0081] The arched end B 7311 is matched with the outer wall surface of the elongated fastening strip 71, and is connected to the elongated fastening strip 71. The arched end B 7311 is connected to the other end of the rectangular end C 7312;

[0082] The guide rod comprises a guide end 7314 and a rectangular end D7313 which are connected as a whole, the wall thickness of the rectangular end D7313 is smaller than that of the guide end 7314, the connection between the guide end 7314 and the rectangular end D7313 is a skew structure, so that when the two pairs of fastening rods C731 are staggered, the guide ends 7314 of the two pairs are at the same vertical position; at this time, the guide ends 7314 of the two pairs are at the same vertical position and are movably connected with the corresponding sleeves 75.

[0083] The fastening end B further comprises a guide table 732, which is mirror-symmetrically arranged in pairs, each being fixedly connected with the upper wall of the fastening end B arranged on the top and the lower wall of the fastening end B arranged on the bottom, and each comprising a guide end A7321, a guide end B7322 and a guide end C7323 which are sequentially connected, the inner wall of the guide end B7322 is arched and matches the outer wall of the extended fastening strip 71, the guide end C7323 is a protrusion and contacts the side wall of the extended fastening strip 71, and the guide end A7321 is a rectangular connection end.

[0084] The guide tables 732 are arranged at the vertical two ends, the guide end C7323 is a protrusion and contacts the side wall of the extended fastening strip 71, so that when the welding strip is not straight, the protrusion can block the bearing of the protruding part of the welding strip, ensuring that the welding strip can be quickly fastened.

[0085] The assembly frame 74 comprises:

[0086] a rectangular table 741, which is open on one side, and the fastening piece is arranged on the open side of the rectangular table 741;

[0087] a connection table A 742, which is arranged horizontally in the middle of the rectangular table 741, wherein the motor B 761 is arranged on the top of the connection table A 742, the screw rod 762 and the telescopic rod 763 are arranged on the lower plate of the rectangular table 741, and the chain 764 is arranged vertically and on the side of the connection table A 742 far from the fastening piece;

[0088] a connection table B 743, which is arranged horizontally between the connection table A 742 and the lower plate;

[0089] The guide disc 78 is screwed on the rotating rod A, one end of the rotating rod A is fixedly connected to the connection table A 742, and the other end of the rotating rod A is fixedly connected to the connection table B 743; the rotating table A 711 and the rotating table B 79 are screwed on the rotating rod B, the top of the rotating rod B is fixedly connected to the connection table A 742, the rotating rod B penetrates through the connection table B 743, the rotating table B 79 is arranged between the connection table A 742 and the connection table B 743, the rotating table A 711 is arranged below the connection table B 743, and the rotating table A 711 and the linkage piece B 7631 are at the same vertical position.

[0090] The sleeve 75 connected by the fastening rod D733 installed on the top is fixed on the upper plate of the rectangular platform 741, and the sleeve 75 connected by the fastening rod D733 installed on the bottom is fixed on the lower plate of the rectangular platform 741; the inner wall surface of the three extended fastening strips 71 is provided with the silica gel sheet 710, which increases the friction between the extended fastening strip 71 and the outer wall surface of the solder strip and reduces the possibility of movement of the solder strip during the tensile test.

[0091] The installed connecting platform A742 and the connecting platform B743 are used to fix the linkage unit, the guide disc 78 and the traction unit 76. The chain 764 is installed, and the outwardly protruding cavity for assembling the chain 764 is reserved on the side of the rectangular platform 741 and the opening.

[0092] The basic principles and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A tensile testing machine for testing the tensile strength of welding strips, comprising a base, a support fixedly connected to the upper end of the base, a machine housing fixedly connected to one side of the support, a tensile sensor fixedly connected to the upper end of the base and below the support, an electric telescopic rod fixedly connected to the upper end of the support, and a fixing frame fixedly connected to the lower end of the electric telescopic rod and the upper end of the tensile sensor, characterized in that, The other side of the fixing frame is fixed with a welding strip locking component; The welding strip locking component includes: a fastener, which is an arched fastener consisting of three extended fastening bars with collinear central axes, the three extended fastening bars being circumferentially equidistant; a fastening unit A, which includes a pair of fastening rods A and a fastening rod B arranged in an alternating manner, each pair of fastening rods A including: a fastening end A, one end of which is fixedly connected to the center of an extended fastening bar; a traction rod, one end of which is fixedly connected to the other end of the fastening end A, the angle between the traction rod and the fastening end A being one-third of a circumference, and the angle between the traction rod of the pair of fastening rods A and the third extended fastening bar being one-third of a circumference; the arched portion of the fastening rod B is fixedly connected to the center of the third extended fastening bar and is located below the intersection of the pair of traction rods; together, the pair of traction rods and the fastening rod B are pulled, causing the three extended fastening bars to move together toward or away from the central axis; The welding strip locking component also includes: An assembly rack, one end of which is fixedly connected to a fixed frame; The linkage unit consists of a pair, each mirror-mounted on one side of the end of the traction rod of a pair of fastening rods A. A linkage plate A is installed on the side of the traction rod closest to the linkage unit, and a tooth is reserved on the other side of the linkage plate A so that the linkage plate A and the linkage unit can mesh together. The guide plate is provided in pairs, and each linkage unit is equipped with a corresponding guide plate, so that the traction rod is positioned between the guide plate and the linkage unit; The traction unit includes a telescopic rod. A linkage plate B is installed on each side wall of the telescopic rod. The other side of the linkage plate B is reserved with teeth. Each of the two linkage units engages with the linkage plate B on the telescopic rod. The other end of the fastening rod B is fixed to the upper wall of the telescopic rod, thereby driving a pair of traction rods and fastening rod B to move together via the telescopic rod. The linkage unit, guide plate, traction unit, and sleeve are all fixedly connected to the assembly frame.

2. A tensile testing machine for testing the tensile strength of welding strips according to claim 1, characterized in that: The welding strip locking component also includes: Fastening unit B includes a pair of fastening rods C and a fastening rod D arranged in an alternating manner. The pair of fastening rods C includes: a fastening end B, one end of which is fixed to the head end of an extended fastening strip; a guide rod, one end of which is fixed to the other end of the fastening end B, and the angle between the guide rod and the fastening end B is one-third of a circumference, and the angle between the guide rod of the pair of fastening rods C and the third extended fastening strip is one-third of a circumference; the arched portion of the fastening rod D is fixed to the head end of the third extended fastening strip, and is located below the intersection of the pair of guide rods. Among them, the other end of the guide rod of a pair of fastening rods C and the other end of the fastening rod D are movably connected to the sleeve; the fastening unit B is provided in pairs, each installed at the top and bottom of the extension fastening strip, that is, at the two vertical ends of the fastening unit A.

3. A tensile testing machine for testing the tensile strength of welding strips according to claim 2, characterized in that: The traction unit includes: Motor B, the rotating part of motor B is fixedly connected to sprocket A; The chain has one end engaged with sprocket A on motor B, and the other end engaged with sprocket B. The screw is fixedly connected at one end to sprocket B at the other end of the chain; The telescopic rod is installed on the screw rod and welded to the nut. In this case, the extension position of the linkage plate B is consistent with the axial position of the screw rod. The linkage unit includes a rotating platform B mounted on top and a rotating platform A mounted below. Both rotating platforms A and B have pre-drilled teeth on their outer circumferential surfaces. The rotating platform A and the linkage plate B engage with each other via the teeth. The rotating platform B and the linkage plate A on the traction rod engage with each other via the teeth. The rotating platform B and the guide plate are in the same vertical position, and the traction rod is located between the guide plate and the rotating platform B.

4. A tensile testing machine for testing the tensile strength of welding strips according to claim 1, characterized in that: Fastening end A includes: Rectangular end A, one end of rectangular end A is fixedly connected to the traction rod; Arched end A, the wall surface of arched end A matches the wall surface of the extended fastening strip and is fixedly connected to the extended fastening strip, one end of arched end A is fixedly connected to the other end of rectangular end A; The traction rod includes a toothed end of the mounting linkage plate A connected as a whole and a rectangular end B without a pre-reserved tooth. The wall thickness of the rectangular end B is less than the wall thickness of the toothed end. The connection between the toothed end and the rectangular end B is a skewed structure so that when a pair of fastening rods A on both sides are staggered, the toothed ends of the pair are in the same vertical position.

5. A tensile testing machine for testing the tensile strength of weld strips according to claim 2, characterized in that: Fastening end B includes: Rectangular end C, one end of rectangular end C is fixedly connected to the guide rod; Arched end B and the outer wall surface of the extended fastening strip match each other and are fixedly connected to the extended fastening strip. One end of arched end B is fixedly connected to the other end of rectangular end C. The guide rod comprises a guide end and a rectangular end D connected as a whole. The wall thickness of the rectangular end D is less than that of the guide end. The connection between the guide end and the rectangular end D is a skewed structure, so that when a pair of fastening rods C on both sides are staggered, the pair of guide ends are in the same vertical position. In this case, the pair of guide ends on both sides in the same vertical position are movably connected to the corresponding sleeve.

6. A tensile testing machine for testing the tensile strength of weld strips according to claim 5, characterized in that: The fastening end B also includes a guide platform, which is mirror-image of a pair of guide platforms. Each guide platform is fixed to the upper wall of the fastening end B installed at the top and to the lower wall of the fastening end B installed at the bottom. Each guide platform includes a guide end A, a guide end B and a guide end C connected in sequence. The inner wall of the guide end B is an arched shape that matches the outer wall of the extended fastening strip. The guide end C is a protrusion that contacts the inner wall of the guide end C and the side wall of the extended fastening strip. The guide end A is a rectangular connecting end.

7. A tensile testing machine for testing the tensile strength of welding strips according to claim 3, characterized in that: The assembly rack includes: A rectangular platform with an opening on one side, and the fastener is located on the side of the opening of the rectangular platform; Connecting platform A is horizontally installed in the middle of the rectangular platform. Motor B is installed on the top of connecting platform A. The screw and telescopic rod are installed on the lower plate of the rectangular platform. The chain is installed vertically and is located on the side of connecting platform A that is farthest from the fastener. Connecting platform B is horizontally installed between connecting platform A and the lower plate; In this configuration, the guide plate is connected to the rotating rod A, one end of which is fixed to the connecting platform A, and the other end is fixed to the connecting platform B. Both the rotating platform A and the rotating platform B are screwed onto the rotating rod B, the top of which is fixed to the connecting platform A. The rotating rod B passes through the connecting platform B, placing the rotating platform B between the connecting platform A and the connecting platform B. The rotating platform A is below the connecting platform B, and the rotating platform A and the linkage plate B are in the same vertical position.

8. A tensile testing machine for testing the tensile strength of weld strips according to claim 7, characterized in that: The fastening rod D at the top is connected to the sleeve and fixed to the upper plate of the rectangular platform, while the fastening rod D at the bottom is connected to the sleeve and fixed to the lower plate of the rectangular platform; silicone sheets are installed on the inner wall of the three extended fastening strips.

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