Novel welding ground wire clamp

Abstract

The utility model discloses a novel welding ground wire clamp, and relates to the technical field of welding. The novel welding ground wire clamp comprises a C-shaped frame, a copper bar is arranged on one side, close to a lower frame body, of an upper frame body of the C-shaped frame, the copper bar is connected with an electric wire, and the novel welding ground wire clamp is characterized in that a padding height adjusting mechanism capable of adjusting the padding height of the bottom of a workpiece upwards or downwards according to the thickness range of the workpiece is arranged between the upper frame body and the lower frame body, and a clamping mechanism connected with the copper bar and used for clamping the workpiece is arranged on the upper frame body. And the fine adjustment mechanism is used for finely adjusting the clamping stroke of the copper bar so as to clamp the workpiece between the copper bar and the heightening adjustment mechanism. According to the utility model, the heightening adjusting mechanism can be adjusted upwards or downwards according to the thickness range of a workpiece so as to adapt to workpieces with different thicknesses, and the fine adjustment mechanism above is matched to clamp the workpiece, so that the adjusting stroke of the copper bar is short, and the copper bar clamping device is suitable for frequent switching and clamping among steel plates with different thicknesses, and is high in working efficiency, short in conductive path and high in reliability. And the electric lead is not easy to loosen and break and has long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a new type of welding ground wire clamp which can be used for plates with different thicknesses, has an electric wire that is not easy to loosen or break, and has a long service life. Background Art

[0002] Steel structure projects, especially bridge steel structure projects, involve a wide range of steel plate thicknesses. The thickness of steel plates in some single steel bridge projects can range from 4 to 120 mm, and many welding methods such as submerged arc welding are used. There are some problems with the use of existing common welding ground wire clamps: For example, the opening of the A-type ground wire clamp is not large enough to clamp thick plates. Although the conventional C-type ground wire clamp can clamp thick plates, it does not have a range conversion function. During the frequent conversion of thin and thick plates, the screw adjustment stroke is very long, and the operation is very time-consuming and laborious. In addition, the existing common welding ground wire clamp has a small contact area with the workpiece and a long conductive path. It is not suitable for long-term welding with high current. Most of the existing common welding ground wire clamps do not have the function of fixing the electrical wire. Long-term use can easily lead to loosening between the copper nose and the wire, or even breakage at the root of the wire, resulting in a short service life and affecting the welding quality.

[0003] The patent with publication number CN208111723U discloses a technical solution for a welding ground wire clamp, which solves the technical problem that ordinary ground wire clamps are not suitable for clamping large or differently shaped workpieces. However, the welding ground wire clamp cannot select a suitable range according to different plate thicknesses during use. When clamping and fixing workpieces of different plate thicknesses, the pressing plate 3 needs to move a large stroke, which is inconvenient to operate. Due to the large stroke of the pressing plate 3, the conductive wire connected to the pressing plate 3 needs to reserve a residual length that is compatible with the stroke of the pressing plate 3. The residual length is large, the conductive path is long, and there is no fixation of the electrical wire, which increases the risk of being pulled and hung up during use.

[0004] The patent with publication number CN211219099U discloses a multifunctional grounding pliers for electric welding machines, which only needs to adjust the extrusion plate 7 to compact workpieces of different plate thicknesses. Although the conductive plate 4 does not need to adjust the stroke according to the plate thickness, the conductive wire is less affected. However, when the plate thickness is large, a large pulling force needs to be applied to pull the extrusion plate 7 a larger stroke distance, which is more laborious to use. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a new type of welding ground wire clamp which can be applied to plates of different thicknesses, has an electric wire that is not easy to loosen or break, and has a long service life.

[0006] The technical solution adopted by the utility model to achieve the above technical effects is:

[0007] A novel welding ground wire clamp comprises a "C"-shaped frame, wherein the upper frame of the "C"-shaped frame is provided with a copper bar on one side close to the lower frame, and the copper bar is connected to an electrical conductor, wherein a pad height adjustment mechanism is provided between the upper frame and the lower frame, which can adjust the pad height of the bottom of the workpiece upward or downward according to the thickness range of the workpiece, and a fine-adjustment mechanism is provided on the upper frame, which is connected to the copper bar and is used to fine-tune the clamping stroke of the copper bar so as to clamp the workpiece between the copper bar and the pad height adjustment mechanism.

[0008] Preferably, in the above-mentioned new welding grounding clamp, the height adjustment mechanism includes a fixed shaft arranged between the upper frame body and the lower frame body, close to the inner side of the vertical frame body of the "C"-shaped frame, and a plurality of square tubes of the same specifications and sizes rotatably connected to the fixed shaft on the shaft rod located between the upper frame body and the lower frame body, wherein the fixed shaft is provided with a square tube compression spring and a gasket on the shaft rod between the topmost square tube and the upper frame body.

[0009] Preferably, in the above-mentioned new welding ground wire clamp, the square tube is provided with a through hole on one side of the rotating end connected to the fixed shaft, and the fixed shaft is provided with a pin hole corresponding to the through hole, and the square tube is fixed by pins arranged in the through hole and the pin hole.

[0010] Preferably, in the above-mentioned novel welding grounding clamp, a range scale is provided on the side of the vertical frame body of the "C"-shaped frame.

[0011] Preferably, in the above-mentioned new type of welding grounding clamp, the fine-tuning mechanism includes an adjusting screw rotatably connected to the upper frame body and two sliding screws located on both sides of the adjusting screw and slidably connected to the upper frame body, the lower end of the adjusting screw is fixedly connected to the upper surface of the copper bar, the lower end of the sliding screw is rotatably connected to the upper surface of the copper bar, the upper end of the adjusting screw is provided with a rotating wrench, and the sliding screw is provided with a copper bar compression spring on the rod body between the nut located at the upper end of the sliding screw and the upper frame body.

[0012] Preferably, in the above-mentioned new type of welding ground wire clamp, the copper busbar is fixed with a ground wire copper nose by bolts, and the ground wire copper nose is electrically connected to the electric conductor, and an electric conductor fixing card for fixing the electric conductor is provided on one side of the vertical frame body of the "C"-shaped frame, wherein the electric conductor is provided with a residual displacement section at the end connected to the ground wire copper nose that can adapt to the fine-tuning displacement of the copper busbar.

[0013] The beneficial effects of the utility model are as follows: the utility model can adjust the pad height adjustment mechanism upward or downward according to the workpiece thickness range to adapt to workpieces of different thicknesses, and the workpiece is clamped by the fine-tuning mechanism above, so that the adjustment stroke of the copper bar is short, which is suitable for frequent switching and clamping between steel plates of different thicknesses, has high work efficiency, short conductive path, and the electrical conductor is not easy to loosen or break, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a diagram of the use state of the utility model when clamping a workpiece;

[0016] Figure 3 This is a diagram of the utility model in use when clamping a 6mm thick workpiece;

[0017] Figure 4 This is a diagram of the utility model in use when clamping a 50mm thick workpiece;

[0018] Figure 5 This is a diagram of the utility model in use when clamping a workpiece with a thickness of 110 mm. DETAILED DESCRIPTION

[0019] In order to further understand the present invention, the present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0020] In the description of this utility, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this utility. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of this utility, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility can be understood according to specific circumstances.

[0022] See also Figure 1As shown in the figure, a new type of welding grounding clamp proposed in an embodiment of the utility model includes a "C"-shaped frame 1, and the "C"-shaped frame 1 is composed of a lower frame body 11, an upper frame body 12 and a vertical frame body 13. The upper frame body 12 is provided with a copper bar 4 electrically contacting with the workpiece 100 on one side close to the lower frame body 11, and the copper bar 4 is connected to an electric wire 6, and the other end of the electric wire 6 is electrically connected to the welding machine transformer. Among them, as an improvement of the utility model, as Figure 1 As shown, a pad height adjustment mechanism 3 is provided between the upper frame 12 and the lower frame 11, which can adjust the bottom pad height of the workpiece upward or downward according to the workpiece thickness range, and a fine adjustment mechanism 5 is provided on the upper frame 12, which is connected to the copper bar 4 and used to fine-tune the clamping stroke of the copper bar 4, so as to clamp the workpiece 100 between the copper bar 4 and the pad height adjustment mechanism 3. The pad height of the bottom of the workpiece 100 can be adjusted by the pad height adjustment mechanism 3, and the lower surface of the workpiece 100 can be supported, so that the upper surface of the workpiece 100 is close to the upper copper bar 4, so as to reduce the downward adjustment stroke of the copper bar 4. After the pad height adjustment mechanism 3 is adjusted according to the thickness of the workpiece, the copper bar 4 is moved downward by a smaller stroke through the fine adjustment mechanism 5, and the workpiece 100 is clamped between the copper bar 4 and the pad height adjustment mechanism 3, and the welding work can be started. The pad height adjustment mechanism 3 can be adjusted to adapt to workpieces of different thicknesses, and the workpiece 100 can be clamped and fixed by the fine-tuning mechanism 5 above, so that the adjustment stroke of the copper busbar 4 is relatively short. On the one hand, it can be suitable for frequent switching and clamping between steel plates of different thicknesses, with high work efficiency. On the other hand, the conductive path is short, the electrical conductor is not easy to loosen or break, and the service life is long.

[0023] Further, in a preferred embodiment of the present invention, Figure 1 As shown, the height adjustment mechanism 3 includes a fixed shaft 2 disposed between the upper frame 12 and the lower frame 11, close to the inner side of the vertical frame 13 of the "C"-shaped frame 1, and a plurality of square tubes 31 of the same size and specifications that are rotatably connected to the fixed shaft 2 on the shaft rod located between the upper frame 12 and the lower frame 11. Among them, the fixed shaft 2 is provided with a square tube compression spring 21 and a gasket on the shaft rod between the uppermost square tube 31 and the upper frame 12, and the square tube compression spring 21 can be used to press the square tube 31 downward. Figure 4 As shown, the square tube 31 is provided with a through hole on one side of the rotating end connected to the fixed shaft 2, and the fixed shaft 2 is provided with a pin hole 22 corresponding to the through hole, and the square tube 31 is fixed by a pin 9 provided in the through hole and the pin hole 22. Figure 2As shown, when clamping a thick workpiece 100, first remove the pins 9 in the two upper square tubes, then rotate the two upper square tubes to a 90° position to form a square tube 31b for making way, and the square tube supporting the workpiece 100 below forms a supporting square tube 31a. The workpiece 100 is raised to a height close to the copper bar 4 by the height adjustment mechanism 3, and then the copper bar 4 is adjusted downward to a shorter stroke by the fine adjustment mechanism 5, so that the copper bar 4 is pressed against the upper surface of the workpiece 100, thereby completing the clamping and fixing of the workpiece 100.

[0024] Further, in a preferred embodiment of the present invention, Figure 1 As shown, a range scale 8 is provided on the side of the vertical frame body 13 of the “C”-shaped frame 1, through which the adjustment of the square tube 31 in the cushioning adjustment mechanism 3 can be better determined.

[0025] Further, in a preferred embodiment of the present invention, Figure 1 As shown, the fine-tuning mechanism 5 includes an adjusting screw 51 which is threadedly rotatably connected to the upper frame body 12, and two sliding screws 52 which are located on both sides of the adjusting screw 51 and are slidably connected to the upper frame body 12. Among them, the lower end of the adjusting screw 51 is fixedly connected to the upper surface of the copper bar 4, and the lower end of the sliding screw 52 is rotatably connected to the upper surface of the copper bar 4. A rotating wrench 54 is provided at the upper end of the adjusting screw 51, and a copper bar clamping spring 53 is sleeved on the rod body of the sliding screw 52 between the nut located at the upper end thereof and the upper frame body 12. The two sliding screws 52 have the same height and are kept in linkage under the drive of the adjusting screw 51. The copper bar clamping spring 53 and the adjusting screw 51 work together to ensure that the copper bar 4 is tightly attached to the workpiece 100. As shown Figure 2 As shown, the copper bar 4 is fixed with a ground wire copper nose by a bolt 41, and the ground wire copper nose is electrically connected to the electric wire 6. One side of the vertical frame body 13 of the "C"-shaped frame 1 is provided with an electric wire fixing card 7 for fixing the electric wire 6, wherein the electric wire 6 is provided with a residual displacement section 61 that can adapt to the fine-tuning displacement of the copper bar 4 at one end connected to the ground wire copper nose. Since the fine-tuning displacement of the copper bar 4 is short, that is, its adjustment stroke is short, the residual displacement section 61 of the electric wire 6 is also relatively short. During the up and down adjustment process of the copper bar 4, the electric wire 6 is less disturbed, and the electric wire 6 does not have too many free segments, so it is less disturbed, reducing the risk of being pulled and hung up. The welding current is transmitted to the copper bar 4 through the electric wire 6 and then to the workpiece 100. The conductive path is short, the copper bar 4 is in close contact with the workpiece 100 and the contact area is large, which can avoid overheating at the connection position, has a good conductive effect, can adapt to large current and long-term conduction, and effectively ensures the welding quality. The electric wire fixing card 7 arranged on the side can prevent the ground wire copper nose and the electric wire 6 from loosening or breaking due to long-term use, and the service life is long.

[0026] Specifically, as a preferred embodiment, in the present invention, the square tube 31 is a square steel tube with a cross section of 20 mm, and the number is 5. The minimum scale of the range scale 8 is 20 mm, which is the same as the height of a single square tube 31. The 0 scale of the range scale 8 is at the top, followed by the 20 mm scale line, the 40 mm scale line, the 60 mm scale line, the 80 mm scale line, the 100 mm scale line, and the 120 mm scale line.

[0027] like Figure 3 As shown, this is a diagram of the use state of the utility model when clamping a 6mm thick workpiece. When clamping a 6mm thick workpiece, a range of 0 to 20mm is selected, and the square tubes 31 are all parallel to the lower frame body 11 of the "C"-shaped frame 1, that is, they are kept in the initial position without rotating. Then, by rotating the adjusting screw 51 downward, the copper bar 4 is moved downward by a shorter stroke, pressing against the upper surface of the workpiece 100, and a good welding grounding effect can be achieved after power is turned on.

[0028] like Figure 4 As shown, it is a diagram of the use state of the utility model when clamping a 50mm thick workpiece. When clamping a 50mm thick workpiece, a range of 40-60mm is selected. At this time, the two square tubes 31 at the top need to be rotated 90° and adjusted to give way to the square tube 31b. The three square tubes 31 at the bottom continue to maintain the initial non-rotating state, parallel to the lower frame 11 of the "C"-shaped frame 1, and the state is to support the square tube 31a. Then, by rotating the adjusting screw 51 downward, the copper bar 4 moves downward by a shorter stroke, pressing against the upper surface of the workpiece 100, and a good welding grounding effect can be achieved after power is turned on.

[0029] like Figure 5 As shown, this is a diagram of the use state of the utility model when clamping a 110mm thick workpiece. When clamping a 110mm thick workpiece, a range of 100-120mm is selected. At this time, all five square tubes 31 need to be rotated 90° to become the giving square tube 31b, and the bottom of the workpiece 100 is supported on the lower frame 11. Then, by rotating the adjusting screw 51 downward, the copper bar 4 is moved downward by a shorter stroke to press against the upper surface of the workpiece 100, and a good welding grounding effect can be achieved after power is turned on.

[0030] The utility model innovates on the basis of the existing technology by optimizing the structural design. It is applicable to a wide range of plate thicknesses and is easy to operate. It also has good electrical conductivity, high safety, and a long service life. It has many advantages and is suitable for promotion and application in the steel structure industry, especially the bridge steel structure industry.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and the specification only describe the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel welding grounding clamp, comprising a "C"-shaped frame (1), wherein an upper frame body (12) of the "C"-shaped frame (1) is provided with a copper bar (4) on one side close to a lower frame body (11), wherein the copper bar (4) is connected to an electric wire (6), and characterized in that: A pad height adjustment mechanism (3) is provided between the upper frame (12) and the lower frame (11) and can adjust the pad height of the bottom of the workpiece upward or downward according to the thickness range of the workpiece. A fine adjustment mechanism (5) is provided on the upper frame (12) and is connected to the copper bar (4) and is used to finely adjust the clamping stroke of the copper bar (4) so ​​as to clamp the workpiece (100) between the copper bar (4) and the pad height adjustment mechanism (3).

2. The new welding ground wire clamp according to claim 1 is characterized in that: The height adjustment mechanism (3) comprises a fixed shaft (2) disposed between the upper frame (12) and the lower frame (11) and close to the inner side of the vertical frame (13) of the "C"-shaped frame (1), and a plurality of square tubes (31) of the same size and specification rotatably connected to the fixed shaft (2) on the shaft located between the upper frame (12) and the lower frame (11), wherein the fixed shaft (2) is provided with a square tube clamping spring (21) and a gasket on the shaft located between the uppermost square tube (31) and the upper frame (12).

3. The new welding ground wire clamp according to claim 2 is characterized in that: The square tube (31) is provided with a through hole on one side of the rotating end connected to the fixed shaft (2), and the fixed shaft (2) is provided with a pin hole (22) corresponding to the through hole, and the square tube (31) is fixed by a pin (9) provided in the through hole and the pin hole (22).

4. The new welding ground wire clamp according to claim 1 is characterized in that: A measuring scale (8) is provided on the side of the vertical frame body (13) of the "C"-shaped frame (1).

5. The new welding ground wire clamp according to claim 1 is characterized in that: The fine adjustment mechanism (5) comprises an adjusting screw (51) threadedly connected to the upper frame (12) and two sliding screws (52) located on both sides of the adjusting screw (51) and slidably connected to the upper frame (12); the lower end of the adjusting screw (51) is fixedly connected to the upper surface of the copper bar (4); the lower end of the sliding screw (52) is rotatably connected to the upper surface of the copper bar (4); a rotating wrench (54) is provided at the upper end of the adjusting screw (51); and a copper bar pressing spring (53) is sleeved on the rod body of the sliding screw (52) between a nut located at the upper end thereof and the upper frame (12).

6. The new welding ground wire clamp according to claim 1 is characterized in that: The copper busbar (4) is fixed with a grounding copper nose by means of a bolt (41), and the grounding copper nose is electrically connected to the electric conductor (6). An electric conductor fixing clamp (7) for fixing the electric conductor (6) is provided on one side of the vertical frame body (13) of the "C"-shaped frame (1), wherein the electric conductor (6) is provided with a residual displacement section (61) capable of adapting to the fine adjustment displacement of the copper busbar (4) at one end connected to the grounding copper nose.

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