Multi-head gantry automatic spot welding machine

Abstract

The utility model discloses a multi-head gantry automatic spot welding machine, which comprises a main frame, a support and a control cabinet, and further comprises a welding mechanism arranged on the main frame and used for spot welding of workpieces; at least part of the positioning unit is arranged on the welding mechanism, the positioning unit can move towards one side of the workpiece along the welding mechanism and move in the vertical direction of the welding mechanism, and the positioning unit is used for positioning the workpiece during spot welding; the moving mechanism is arranged on the support and used for adjusting the distance between the workpiece and the welding mechanism in the vertical direction; the welding device further comprises an adjusting piece arranged on the moving unit and used for adjusting the relative displacement between the workpiece and the welding mechanism in the horizontal direction. According to the gantry spot welding device, spot welding can be carried out on multiple positions of a gantry at the same time, the spot welding efficiency and spot welding quality of the gantry are improved, dislocation spot welding can be carried out on the gantry, operation is simpler, and the spot welding positions are more accurate.

Description

Technical Field

[0001] The utility model relates to a gantry spot welding machine, in particular to a multi-head gantry automatic spot welding machine. Background Art

[0002] Spot welding refers to a welding method that uses a cylindrical electrode to form a weld between the contact surfaces of two overlapping workpieces. During spot welding, pressure is first applied to make the workpieces in close contact, and then the current is turned on. The contact between the workpieces melts under the action of resistance heat, and a weld is formed after cooling. Spot welding is mainly used for welding of sheet metal stampings with a thickness of less than 4mm, and is particularly suitable for welding automobile bodies, carriages, and aircraft fuselages. However, it cannot weld containers with sealing requirements. Gantry is usually fixed by spot welding.

[0003] At present, the gantry is usually spot welded manually, which is not only inefficient but also difficult to control the quality of spot welding. Among the existing equipment, there are also devices that can spot weld multiple points on the gantry at the same time, but most of them can only spot weld the positions on the same straight line or the same plane on the gantry, but some need to spot weld the gantry at different positions, etc. At this time, the staff needs to constantly adjust its position, which is cumbersome to operate and it is difficult to ensure the accuracy of the spot welding position. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-head gantry automatic spot welding machine to solve the technical problems in the prior art. It can spot weld multiple positions of the gantry at the same time, improve the spot welding efficiency and spot welding quality of the gantry, and can also perform staggered spot welding on the gantry. The operation is simpler and the spot welding position is more accurate.

[0005] The utility model provides a multi-head gantry automatic spot welding machine, comprising a main frame, a bracket and a control cabinet, and also comprising: a welding mechanism, which is arranged on the main frame and is used for spot welding a workpiece; a positioning unit, which is at least partially arranged on the welding mechanism, and the positioning unit can move along the welding mechanism toward one side of the workpiece, and move along the vertical direction of the welding mechanism, and is used for positioning the workpiece during spot welding; a moving mechanism, which is arranged on the bracket and is used for adjusting the distance between the workpiece and the welding mechanism in the vertical direction; wherein, it also comprises an adjusting member arranged on the moving unit, which is used for adjusting the relative displacement between the workpiece and the welding mechanism in the horizontal direction; the welding mechanism, the positioning unit, the moving mechanism and the adjusting member are all electrically connected to the control cabinet.

[0006] In the technical solution of the embodiment of the present application, the gantry is placed between the welding mechanisms, and the position of the gantry is positioned by the positioning unit, while ensuring the stability of the position of the gantry during spot welding, thereby ensuring the accuracy of the gantry during welding; further, after being positioned by the positioning unit, multiple positions of the gantry can be spot welded simultaneously by the welding mechanism, which can not only ensure the stability of the gantry spot welding quality, but also improve the efficiency of the gantry spot welding; in addition, the positions of different spot weldings of the same gantry can be adjusted by the adjusting member (for example, on the same straight line as the previous welding point, or offset from the previous welding point, or between the previous adjacent welding points); not only is the operation simple, but the accuracy of the spot welding position can also be guaranteed, greatly improving the applicability of the device.

[0007] Preferably, the welding mechanism includes a welding controller fixedly connected to the main frame, a mounting crossbeam fixedly connected to one side of the main frame close to the bracket, a plurality of mounting parts are arranged on the mounting crossbeam, a welding cylinder is fixedly connected to the mounting part, an upper spot welding head is detachably connected to the output end of the welding cylinder, a matching lower spot welding head is arranged on one side of the bracket close to the upper spot welding head, and the welding controller and the welding cylinder are both electrically connected to the control cabinet. In this way, not only can the gantry's multi-point spot welding be realized simultaneously, but also the distance between two adjacent welding heads can be adjusted to meet the requirements of various gantries and the distance between welding points on the gantry.

[0008] Preferably, the positioning unit includes a fixing rod arranged on the mounting crossbeam, the end of the fixing rod away from the mounting crossbeam is fixedly connected to a first positioning cylinder, the output end of the first positioning cylinder is detachably connected to a positioning head, a second positioning cylinder is arranged on the moving mechanism, a positioning plate is fixedly connected to the second positioning cylinder, and the first positioning cylinder and the second positioning cylinder are both electrically connected to the control cabinet. In this way, the contact between the gantry and the lower spot welding head during welding can be stabilized, thereby improving the welding quality of the gantry, and at the same time, the position of the gantry can be prevented from being offset during spot welding, ensuring the stability of the spot welding position of the gantry.

[0009] Preferably, the moving mechanism comprises a longitudinal guide rail symmetrically slidably connected to the bracket, a control device electrically connected to the control cabinet is fixedly connected to the bracket, and transverse guide rails are slidably connected to the two longitudinal guide rails, wherein the second positioning cylinder is fixedly connected to the transverse guide rails. This makes it easy to adjust the relative position between the gantry and the upper spot welding in time after the gantry spot welding is completed at the previous position, so as to spot weld different positions of the gantry and improve the efficiency of the gantry spot welding.

[0010] Preferably, the adjusting member comprises a fixing member fixedly connected to the bracket, a slider is slidably connected inside the fixing member, a push rod is fixedly connected between the slider and the longitudinal guide rail, wherein the push rod is slidably connected to the fixing member, a spring is fixedly connected between the inner wall of the fixing member and the slider, and the spring is sleeved on the push rod. This can be applicable to spot welding of gantries of different sizes, improving the applicability of the device.

[0011] Preferably, the adjusting member further comprises a motor fixedly connected to a side of the fixing member away from the push rod, the output end of the motor is fixedly connected to a screw, the screw is threadedly connected to a threaded block, wherein the screw block is tightly fitted to the inside of the fixing member. By controlling the size of the gas space inside the fixing member, the moving distance of the slider can be adjusted to facilitate spot welding at different positions on the gantry.

[0012] Preferably, the fixing member further comprises an air hole, the air hole being located between the slider and the threaded block. The air pressure in the fixing member can be changed by suction and exhaust through the air hole, thereby adjusting the moving distance of the slider in the fixing member when the gas is injected.

[0013] Preferably, it further comprises a compressor fixedly connected to the main frame, the compressor is used to supply air to the welding cylinder, the first positioning cylinder and the second positioning cylinder, and the compressor is connected to the air hole through a hose.

[0014] Compared with the prior art, the utility model can perform spot welding on multiple positions of the gantry at the same time through the welding mechanism, and position the gantry during spot welding through the positioning unit, thereby improving the spot welding efficiency and spot welding quality of the gantry. At the same time, the gantry can also be staggered for spot welding through the moving mechanism and the adjusting parts, which makes the operation simpler and the spot welding position more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a first three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a second three-dimensional structural schematic diagram of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the lower spot welding head and the moving mechanism of the utility model;

[0018] Figure 4 It is a partial cross-sectional structural schematic diagram of the adjusting member of the utility model;

[0019] Figure 5 This utility model Figure 2 Schematic diagram of the structure at point A in .

[0020] Explanation of the accompanying drawings: 1. Main frame; 2. Welding controller; 3. Control cabinet; 4. Welding mechanism; 41. Mounting beam; 42. Mounting part; 43. Welding cylinder; 44. Reinforcement rib; 45. Upper spot welding head; 401. Fixing rod; 402. First positioning cylinder; 403. Positioning head; 411. Second positioning cylinder; 412. Positioning plate; 5. Bracket; 6. Lower spot welding head; 7. Moving mechanism; 71. Control device; 72. Longitudinal guide rail; 73. Transverse guide rail; 74. Adjusting part; 741. Fixing part; 742. Slider; 743. Push rod; 744. Spring; 745. Motor; 746. Screw; 747. Threaded block; 748. Air hole; 8. Compressor. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0023] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0027] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] like Figure 1-Figure 5 As shown, an embodiment of the utility model provides a multi-head gantry automatic spot welding machine, including a main frame 1, a bracket 5 and a control cabinet 3, and also includes: a welding mechanism 4, which is arranged on the main frame 1 and is used to spot weld a workpiece; a positioning unit, which is at least partially arranged on the welding mechanism 4, and the positioning unit can move along the welding mechanism 4 to one side of the workpiece, and move along the vertical direction of the welding mechanism 4, for positioning the workpiece during spot welding; a moving mechanism 7, which is arranged on the bracket 5, and is used to adjust the distance between the workpiece and the welding mechanism 4 in the vertical direction; wherein, it also includes a moving mechanism 7 arranged on the moving unit to adjust the distance between the workpiece and the welding mechanism 4 in the vertical direction; The joint 74 is used to adjust the relative displacement between the workpiece and the welding mechanism 4 in the horizontal direction; the welding mechanism 4, the positioning unit, the moving mechanism 7 and the adjusting member 74 are all electrically connected to the control cabinet 3, and also include a compressor 8 fixedly connected to the main frame 1, the compressor 8 is used to supply air to the welding cylinder 43, the first positioning cylinder 402, and the second positioning cylinder 411, and the compressor 8 is connected to the air hole 748 through a hose. The compressor 8 can generate high-pressure gas when running to provide power for the welding cylinder 43, the first positioning cylinder 402, and the second positioning cylinder 411.

[0030] In the technical solution of the embodiment of the present application, the gantry is placed between the welding mechanisms 4, and the position of the gantry is positioned by the positioning unit, while ensuring the stability of the position of the gantry during spot welding, thereby ensuring the accuracy of the gantry during welding; further, after being positioned by the positioning unit, multiple positions of the gantry can be spot welded simultaneously by the welding mechanism 4, which can not only ensure the stability of the gantry spot welding quality, but also improve the efficiency of the gantry spot welding; in addition, the positions of different spot weldings of the same gantry can be adjusted by the adjusting member 74 (for example, on the same straight line as the previous welding point, or offset from the previous welding point, or between the previous adjacent welding points;) not only is the operation simple, but also the accuracy of the spot welding position can be guaranteed, greatly improving the applicability of the device.

[0031] In the embodiment provided in the present application, the welding mechanism 4 includes a welding controller 2 fixedly connected to the main frame 1, a mounting beam 41 is fixedly connected to the side of the main frame 1 close to the bracket 5, a plurality of mounting parts 42 are arranged on the mounting beam 41, a welding cylinder 43 is fixedly connected to the mounting part 42, an upper spot welding head 45 is detachably connected to the output end of the welding cylinder 43, a matching lower spot welding head 6 is arranged on the side of the bracket 5 close to the upper spot welding head 45, the welding controller 2 and the welding cylinder 43 are both electrically connected to the control cabinet 3, and a reinforcing rib 44 is also fixedly connected between the upper spot welding head 45 and the mounting part 42, so that the influence of the upper spot welding head 45 on the welding cylinder 43 when spot welding the gantry can be reduced, thereby improving the stability of the operation of the welding cylinder 43.

[0032] Among them, the control cabinet 3, welding controller 2, welding cylinder 43 and upper spot welding head 45 are all conventional means in the prior art, so they are not elaborated. What needs to be explained is that the position of the mounting member 42 on the mounting beam 41 can be adjusted and fixed, and the connection method between the mounting member 42 and the mounting beam 41 is not limited here. As long as the mounting member 42 can be moved and fixed on the mounting beam 41, it is sufficient to adjust the distance between adjacent welding points on the gantry and improve the applicability of the device. In addition, the welding cylinder 43 can be driven to start through the welding controller 2, driving the upper spot welding head 45 to move to the side of the lower spot welding head 6 to realize spot welding of the gantry, and the upper spot welding head 45 and the welding cylinder 43 are fixed in a taper fit to facilitate the disassembly of the upper spot welding head 45 and stability during spot welding.

[0033] In the embodiment provided in the present application, the positioning unit includes a fixed rod 401 arranged on the mounting beam 41, and the end of the fixed rod 401 away from the mounting beam 41 is fixedly connected to the first positioning cylinder 402, and the output end of the first positioning cylinder 402 is detachably connected to the positioning head 403, and a second positioning cylinder 411 is arranged on the moving mechanism 7, and a positioning plate 412 is fixedly connected to the second positioning cylinder 411, and the first positioning cylinder 402 and the second positioning cylinder 411 are both electrically connected to the control cabinet 3.

[0034] The first positioning cylinder 402 can adjust the distance between the positioning head 403 and the gantry, and the second positioning cylinder 411 can adjust the distance between the positioning plate 412 and the gantry, wherein the first positioning cylinder 402 can be opened synchronously with the welding cylinder 43, that is, when the upper spot welding head 45 is spot welding the gantry, the positioning head 403 is just tightly fitted with the gantry, thereby preventing the gantry from jumping during spot welding, thereby ensuring the spot welding quality of the gantry and the accuracy of the spot welding position. In addition, the second positioning cylinder 411 moves synchronously with the transverse guide rail 73, so that when the gantry is spot welding at the next position, the stability of the positioning of the gantry by the positioning plate 412 can be ensured.

[0035] In the embodiment provided in the present application, the moving mechanism 7 includes a longitudinal guide rail 72 symmetrically slidably connected to the bracket 5, a control device 71 electrically connected to the control cabinet 3 is fixedly connected to the bracket 5, and a transverse guide rail 73 is slidably connected to the two longitudinal guide rails 72, wherein the second positioning cylinder 411 is fixedly connected to the transverse guide rail 73.

[0036] The transverse guide rail 73 is an electrically controlled device and can be controlled by the control device 71. In addition, the distance between the two longitudinal guide rails 72 and the relative position between the transverse guide rail 73 and the longitudinal guide rail 72 can be adjusted. The specific structure of the control device 71, the longitudinal guide rail 72 and the transverse guide rail 73 can refer to the conventional means in the prior art, which can be known to technicians in this field and will not be elaborated here.

[0037] In the embodiment provided by the present application, the adjusting member 74 includes a fixing member 741 fixedly connected to the bracket 5, a slider 742 is slidably connected inside the fixing member 741, a push rod 743 is fixedly connected between the slider 742 and the longitudinal guide rail 72, wherein the push rod 743 is slidably connected to the fixing member 741, a spring 744 is fixedly connected between the inner wall of the fixing member 741 and the slider 742, and the spring 744 is sleeved on the push rod 743; the adjusting member 74 also includes a motor 745 fixedly connected to the inside of the fixing member 741 away from the push rod 743, the output end of the motor 745 is fixedly connected to a screw 746, a threaded block 747 is threadedly connected to the screw 746, wherein the screw 746 is tightly fitted with the inside of the fixing member 741; and also includes an air hole 748 opened on the fixing member 741, and the air hole 748 is located between the slider 742 and the threaded block 747.

[0038] By changing the size of the space between the threaded block 747 and the slider 742, when the same amount of gas is injected into the space, when the space is smaller, the slider 742 moves a larger distance, thereby adjusting the relative position between the gantry and the previous welding point.

[0039] The method of using the utility model is as follows: when spot welding is performed on the gantry, the gantry is placed on the lower spot welding head 6, and the gantry is moved to a specified position by means of the transverse guide rail 73 and the longitudinal guide rail 72, and the position of the gantry is positioned by means of the second positioning cylinder 411 and the positioning plate 412, and then the welding cylinder 43 and the first positioning cylinder 402 are started, at which time the welding cylinder 43 drives the plurality of upper spot welding heads 45 to move toward one side of the gantry, and spot welding is performed on the gantry at multiple positions at the same time, and in addition, the first positioning cylinder 402 drives the positioning head 403 to position the gantry, which can ensure that the gantry is aligned with the upper spot welding head 45 and the lower spot welding head 45, and the gantry is positioned at the same time. The spot welding head 6 has stable contact, and on the other hand, it can prevent the gantry from jumping when the upper spot welding head 45 contacts the gantry, thereby ensuring the quality of the gantry welding; when the gantry needs to be spot welded in an offset manner, the screw 746 is driven to rotate by the driving motor 745, and the distance between the slider 742 and the threaded block 747 in the corresponding direction is adjusted to control the size of the space where the air hole 748 exists, so that after equal amounts of gas enter, the slider 742 moves different distances in the fixing part 741, thereby adjusting the position of the gantry, and then performing offset spot welding on the gantry, the operation is simpler, and the spot welding position is more accurate.

[0040] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A multi-head gantry automatic spot welding machine, characterized in that: It includes the main frame, bracket and control cabinet, and also includes: A welding mechanism, arranged on the main frame, for spot welding a workpiece; A positioning unit, at least partially disposed on the welding mechanism, the positioning unit being capable of moving along the welding mechanism toward one side of the workpiece and moving along a vertical direction of the welding mechanism, for positioning the workpiece during spot welding; A moving mechanism, arranged on the support, for adjusting the distance between the workpiece and the welding mechanism in a vertical direction; Wherein, it also includes an adjusting member arranged on the moving unit, for adjusting the relative displacement between the workpiece and the welding mechanism in the horizontal direction; The welding mechanism, the positioning unit, the moving mechanism and the adjusting member are all electrically connected to the control cabinet.

2. A multi-head gantry automatic spot welding machine according to claim 1, characterized in that: The welding mechanism includes a welding controller fixedly connected to the main frame, a mounting beam fixedly connected to one side of the main frame close to the bracket, a plurality of mounting parts are arranged on the mounting beam, a welding cylinder is fixedly connected to the mounting parts, an upper spot welding head is detachably connected to the output end of the welding cylinder, a matching lower spot welding head is arranged on one side of the bracket close to the upper spot welding head, and the welding controller and the welding cylinder are both electrically connected to the control cabinet.

3. A multi-head gantry automatic spot welding machine according to claim 2, characterized in that: The positioning unit includes a fixing rod arranged on a mounting beam, an end of the fixing rod away from the mounting beam is fixedly connected to a first positioning cylinder, an output end of the first positioning cylinder is detachably connected to a positioning head, a second positioning cylinder is arranged on the moving mechanism, a positioning plate is fixedly connected to the second positioning cylinder, and the first positioning cylinder and the second positioning cylinder are both electrically connected to the control cabinet.

4. A multi-head gantry automatic spot welding machine according to claim 3, characterized in that: The moving mechanism includes longitudinal guide rails symmetrically slidably connected to the bracket, a control device electrically connected to the control cabinet is fixedly connected to the bracket, and transverse guide rails are slidably connected to the two longitudinal guide rails, wherein the second positioning cylinder is fixedly connected to the transverse guide rails.

5. The multi-head gantry automatic spot welding machine according to claim 4, characterized in that: The adjusting member comprises a fixing member fixedly connected to the bracket, a slider is slidably connected inside the fixing member, and a push rod is fixedly connected between the slider and the longitudinal guide rail. The push rod is slidably connected to the fixing member, a spring is fixedly connected between the inner wall of the fixing member and the sliding block, and the spring is sleeved on the push rod.

6. A multi-head gantry automatic spot welding machine according to claim 5, characterized in that: The adjusting member also includes a motor fixedly connected to the inside of the fixing member away from the push rod, the output end of the motor is fixedly connected to a screw, and the screw is threadedly connected to a threaded block, wherein the screw block is tightly fitted to the inside of the fixing member.

7. A multi-head gantry automatic spot welding machine according to claim 6, characterized in that: It also includes an air hole opened on the fixing member, and the air hole is located between the sliding block and the threaded block.

8. The multi-head gantry automatic spot welding machine according to claim 7, characterized in that: It also includes a compressor fixedly connected to the main frame, the compressor is used to supply air to the welding cylinder, the first positioning cylinder and the second positioning cylinder, and the compressor is connected to the air hole through a hose.

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