Multi-specification nut resistance welding machine

Abstract

The utility model discloses a multi -specification nut resistance spot welding machine relates to mechanical processing field. This multi -specification nut resistance spot welding machine, including host computer, the outside of host computer is provided with first pressure welding unit, second pressure welding unit and third pressure welding unit, and first pressure welding unit, second pressure welding unit and third pressure welding unit can carry out the welding to the different specifications of the projection welding nut. This multi -specification nut resistance spot welding machine, through the integrated design of first pressure welding unit, second pressure welding unit and third pressure welding unit, at least 3 kinds of specifications projection welding nut's welding can be completed to a host computer, need not to configure many sets of equipment, and the equipment purchase and maintenance cost are reduced greatly. The operator only needs to move workpiece in the host computer range, can switch to different pressure welding unit and complete welding, avoids the back and forth handling between many sets of equipment, promotes the operation efficiency and reduces the handling error.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing technology, specifically to a resistance welding machine for multi-specification nuts. Background Technology

[0002] Currently, the welding of projection weld nuts on the longitudinal beams of vehicle frames mostly uses resistance welding machines with a single-head pressure structure. The core structure of such machines contains only one pressure welding unit (corresponding to a single pressure head device). Therefore, one machine can typically only be used for one type of projection weld nut. If welding multiple types (e.g., three types) of projection weld nuts is required, three or more single-head resistance welding machines are needed, which presents the following drawbacks:

[0003] High equipment costs: The costs of purchasing, installing, and maintaining multiple pieces of equipment increase significantly;

[0004] Large space occupation: The scattered layout of multiple pieces of equipment results in low utilization of factory land.

[0005] Low operating efficiency: Operators need to frequently move workpieces between multiple machines, which is labor-intensive and the welding accuracy is easily affected by handling errors. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a multi-specification nut resistance welding machine. This solves the problem that existing resistance welding machines for projection welding nuts on vehicle frame longitudinal beams typically employ a single-head pressure structure, whose core structure contains only one pressure welding unit. Therefore, a single machine can usually only accommodate one specification of projection welding nut. If welding multiple specifications of projection welding nuts is required, three or more single-head resistance welding machines are needed.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-specification nut resistance welding machine, including a main unit, and a first pressure welding unit, a second pressure welding unit and a third pressure welding unit are arranged on the outside of the main unit, and the first pressure welding unit, the second pressure welding unit and the third pressure welding unit can weld projection weld nuts of different specifications.

[0008] Preferably, the first pressure welding unit, the second pressure welding unit, and the third pressure welding unit are arranged in a ring around the outside of the host with the host as the center.

[0009] Preferably, nut conveyors are provided on both sides of the main unit.

[0010] Preferably, the first pressure welding unit, the second pressure welding unit, and the third pressure welding unit each include a pressure cylinder, an electrode grip, an upper electrode, a lower electrode seat, a lower electrode, and a positioning pin.

[0011] Preferably, the pressurizing cylinder is fixedly installed on the main unit, the electrode grip is fixedly installed at the end of the bottom output shaft of the pressurizing cylinder, and the upper electrode is fixedly installed at the bottom end of the electrode grip.

[0012] Preferably, the lower electrode holder is fixedly installed on the host, the lower electrode is fixedly disposed on the top of the lower electrode holder, the positioning pin is installed above the lower electrode holder, and the central axes of the upper electrode, the lower electrode and the positioning pin coincide.

[0013] Its beneficial effects are as follows:

[0014] 1. This multi-specification nut resistance welding machine, through the integrated design of a first pressure welding unit, a second pressure welding unit, and a third pressure welding unit, allows one main unit to complete the welding of at least three specifications of projection weld nuts, eliminating the need for multiple machines and significantly reducing equipment procurement and maintenance costs. Operators only need to move the workpiece within the main unit's range to switch between different pressure welding units, avoiding back-and-forth handling between multiple machines, improving operational efficiency, and reducing handling errors.

[0015] 2. This multi-specification nut resistance welding machine features a first, second, and third pressure welding unit arranged in a ring around the main unit. Compared to three separate single-head welding machines, this reduces the space required between the equipment and significantly improves the utilization rate of factory space. The upper and lower electrodes and the central axis of the positioning pins in each pressure welding unit coincide, ensuring concentricity during pressurization. Combined with the stable output of the pressure cylinder, this guarantees consistent welding quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 This utility model Figure 1 Enlarged diagram of part A in the image.

[0020] In the diagram: 1. Main unit; 2. First pressure welding unit; 3. Second pressure welding unit; 31. Pressure cylinder; 32. Electrode gripper; 33. Upper electrode; 34. Lower electrode holder; 35. Lower electrode; 36. Positioning pin; 4. Third pressure welding unit; 5. Nut conveyor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] This utility model discloses a resistance welding machine for multi-specification nuts, according to the attached... Figure 1 As shown, the device includes a main unit 1, and a first pressure welding unit 2, a second pressure welding unit 3, and a third pressure welding unit 4 are provided on the outside of the main unit 1. The first pressure welding unit 2, the second pressure welding unit 3, and the third pressure welding unit 4 are capable of welding projection weld nuts of different specifications.

[0024] Through the integrated design of the first pressure welding unit 2, the second pressure welding unit 3, and the third pressure welding unit 4, one main unit 1 can complete the welding of at least three specifications of projection weld nuts, eliminating the need for multiple devices and significantly reducing equipment procurement and maintenance costs. Operators only need to move the workpiece within the range of the main unit 1 to switch to different pressure welding units to complete the welding, avoiding back-and-forth handling between multiple devices, improving operational efficiency and reducing handling errors.

[0025] According to the appendix Figure 2 As shown, the first pressure welding unit 2, the second pressure welding unit 3 and the third pressure welding unit 4 are arranged in a ring around the outside of the host 1 with the host 1 as the center.

[0026] The first pressure welding unit 2, the second pressure welding unit 3, and the third pressure welding unit 4 are arranged in a ring around the main unit 1. Compared with three separate single-head welding machines, this reduces the space between the equipment and significantly improves the utilization rate of the factory land.

[0027] Nut conveyors 5 are installed on both sides of the main unit 1.

[0028] According to the appendix Figure 1-3As shown, the first pressure welding unit 2, the second pressure welding unit 3 and the third pressure welding unit 4 each include a pressure cylinder 31, an electrode gripping rod 32, an upper electrode 33, a lower electrode seat 34, a lower electrode 35 and a positioning pin 36.

[0029] According to the appendix Figure 3 As shown, the pressurizing cylinder 31 is fixedly installed on the main unit 1, the electrode gripping rod 32 is fixedly installed at the end of the bottom output shaft of the pressurizing cylinder 31, and the upper electrode 33 is fixedly installed at the bottom end of the electrode gripping rod 32.

[0030] The lower electrode holder 34 is fixedly installed on the main unit 1, the lower electrode 35 is fixedly installed on the top of the lower electrode holder 34, the positioning pin 36 is installed above the lower electrode holder 34, and the central axes of the upper electrode 33, the lower electrode 35 and the positioning pin 36 coincide.

[0031] The upper electrode 33, lower electrode 35, and positioning pin 36 of each pressure welding unit are aligned on the central axis to ensure concentricity during pressure application. This, combined with the stable output of the pressure cylinder 31, ensures consistent welding quality.

[0032] This embodiment is based on the basic principle of resistance welding. It utilizes the resistance heat generated by the current passing through the contact surface and adjacent areas of the workpiece to heat the workpiece to a plastic or molten state, and forms a welded joint under pressure. Multi-specification adaptation is achieved through multi-unit integrated design. The specific workflow is as follows:

[0033] Preliminary preparation: Based on the nut specification requirements of the workpiece to be welded, the first pressure welding unit 2, the second pressure welding unit 3, and the third pressure welding unit 4 are preset to correspond to the nut specifications to be welded, and the nuts of the corresponding specifications are transported by the nut conveyor 5.

[0034] Workpiece positioning and first specification welding: The operator places the chassis longitudinal beam workpiece on the worktable of the main unit 1, moves the workpiece to the first position to be welded, aligns it with the positioning pin 36 of the first pressure welding unit 2, and achieves precise positioning through the cooperation of the positioning pin 36 and the preset hole on the workpiece. Subsequently, the pressure cylinder 31 drives the electrode handle 32 to move the upper electrode 33 downward until the upper electrode 33 presses the nut against the surface of the workpiece. At this time, the lower electrode 35, the workpiece, the nut, and the upper electrode 33 form a closed loop.

[0035] Electric welding: Current passes through the upper electrode 33, nut, workpiece and lower electrode 35, generating resistance heat at the contact surface, causing the contact area between the nut and the workpiece to melt and form a weld nugget; at the same time, the pressurizing cylinder 31 maintains pressure to ensure that the weld nugget solidifies under pressure to form a strong joint.

[0036] Switching Units and Subsequent Welding: After the first specification nut is welded, the pressurizing cylinder 31 drives the upper electrode 33 to reset; the operator moves the workpiece to the second pressurizing welding unit 3 and repeats the above steps to complete the welding of the second specification nut; similarly, the welding of the third specification nut is completed through the third pressurizing welding unit 4.

[0037] Complete the task: After all nuts of various specifications have been welded, the operator removes the workpiece, thus completing the entire welding process.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multiple gauge nut electric resistance welding machine comprising a main machine (1), characterized in that, The main unit (1) is provided with a first pressure welding unit (2), a second pressure welding unit (3) and a third pressure welding unit (4) on its outer side. The first pressure welding unit (2), the second pressure welding unit (3) and the third pressure welding unit (4) can weld projection welding nuts of different specifications. The first pressure welding unit (2), the second pressure welding unit (3) and the third pressure welding unit (4) are arranged in a ring around the main unit (1) on its outer side.

2. A multiple gauge nut electric resistance welder as defined in claim 1 wherein, Nut conveyors (5) are provided on both sides of the host (1).

3. A multiple gauge nut electric resistance welder as defined in claim 1 wherein, The first pressure welding unit (2), the second pressure welding unit (3) and the third pressure welding unit (4) each include a pressure cylinder (31), an electrode grip (32), an upper electrode (33), a lower electrode seat (34), a lower electrode (35) and a positioning pin (36).

4. A multiple gauge nut electric resistance welder as defined in claim 3 wherein, The pressurizing cylinder (31) is fixedly installed on the host (1), the electrode grip (32) is fixedly installed at the end of the bottom output shaft of the pressurizing cylinder (31), and the upper electrode (33) is fixedly installed at the bottom end of the electrode grip (32).

5. A multiple gauge nut electric resistance welder as defined in claim 3 wherein, The lower electrode holder (34) is fixedly installed on the host (1), the lower electrode (35) is fixedly installed on the top of the lower electrode holder (34), and the positioning pin (36) is installed above the lower electrode holder (34).

6. A multiple gauge nut electric resistance welder as defined in claim 3 wherein, The central axes of the upper electrode (33), lower electrode (35), and positioning pin (36) coincide.

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