Dual pin spot welder

Abstract

The utility model discloses a kind of double needle spot welders, comprising: support, vertically extending guide rail is arranged on it;Retaining component, slider is fixed on it, retaining component can be vertically moved by the cooperation of slider and the slide rail of support;Driving mechanism, for driving retaining component vertically moves to make it approach or away from workpiece;Guide post, it includes two, two guide posts are arranged side by side and are all slidably connected with retaining component, the lower end of guide post extends the lower end of retaining component, spring is set on each guide post, spring is used to exert downward elastic force to guide post;Positioning component, it includes two, two positioning components are respectively fixed below two guide posts, two welding needles are respectively installed on two positioning components, the distance between two welding needles is configured to be consistent with the distance between the target position of the two stepped surfaces of workpiece.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a double-needle spot welding machine. Background Technology

[0002] When spot welding workpieces, the following welding conditions are frequently encountered: the two target welding positions of the workpiece to be welded are located on two stepped surfaces with a certain height difference. In existing technology, the welding process for these two target positions involves: first, moving the welding needle to one target position to perform welding; then, moving the welding needle to the other target position to perform welding. Because the two target positions are at different heights, a pre-set control program is needed to control the drive stroke of the drive mechanism used to move the welding needle, making the welding process relatively complex. Furthermore, since the drive mechanism rigidly drives the welding needle, using only one drive mechanism to feed the welding needle can easily lead to contact impact between the welding needle and the workpiece. Therefore, when the welding needle approaches the workpiece, another drive mechanism is needed to provide a lower drive speed; thus, two drive mechanisms are required. Utility Model Content

[0003] In view of the above-mentioned technical problems existing in the prior art, this utility model provides a double-needle spot welding machine.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A dual-needle spot welding machine, comprising:

[0006] The bracket is equipped with vertically extending guide rails;

[0007] A retaining component with a slider fixed thereon, the retaining component being able to move vertically through the slider engaging with the slide rail of the bracket;

[0008] A drive mechanism for driving the holding component to move vertically to bring it closer to or away from the workpiece;

[0009] The guide post includes two guide posts arranged side by side and both slidingly engaged with the retaining member. The lower end of each guide post extends beyond the lower end of the retaining member. Each guide post is fitted with a spring, which applies a downward elastic force to the guide post.

[0010] The positioning component includes two components, which are respectively fixed below the two guide posts. Two welding pins are respectively mounted on the two positioning components, and the distance between the two welding pins is configured to be consistent with the distance between the target positions of the two stepped surfaces of the workpiece.

[0011] Preferably, the retaining component has an upper plate and a lower plate spaced apart. The upper plate is fixed with two guide cylinders, and the upper ends of the two guide posts extend into the two guide cylinders respectively. The two guide posts pass through the lower plate and slide in cooperation with the lower plate.

[0012] Preferably, the spring is sleeved on the section of the guide post between the upper plate and the lower plate.

[0013] Preferably, a limiting block is fixed on the guide post above the lower plate, and the limiting block is used to limit the distance between the positioning component and the lower plate.

[0014] Preferably, the distance between the two positioning components and the lower plate is made consistent by adjusting the limiting block on the guide post.

[0015] Preferably, the positioning component includes a fixing component and an mounting component, both of which are rectangular block structures. The fixing component is fixed to the lower end of the guide post, the mounting component is fixed on the fixing component, and the welding pin is mounted on the mounting component.

[0016] Preferably, the elastic arm and the clamping slot are obtained by cutting the front side of the mounting component, the sidewall of the elastic arm serves as a wall of the clamping slot, and the welding needle passes through the clamping slot and is clamped by the elastic arm.

[0017] Preferably, the clamping seam is further provided with a limiting groove to restrict the lateral movement of the welding needle.

[0018] Preferably, the driving mechanism is a cylinder.

[0019] Compared with the prior art, the beneficial effects of the dual-needle spot welding machine disclosed in this utility model are:

[0020] The spot welding machine provided by this utility model can simultaneously weld target positions on two stepped surfaces of different heights on a workpiece.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit the present invention.

[0022] The overview of various implementations or examples of the technology described in this utility model is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0023] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the utility model. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0024] Figure 1 This is a three-dimensional structural diagram of a dual-needle spot welding machine provided in an embodiment of the present invention.

[0025] Figure 2 A perspective sectional view of a dual-needle spot welding machine provided for an embodiment of this utility model.

[0026] Figure 3 This is a top view of a dual-needle spot welding machine provided in an embodiment of the present invention.

[0027] Figure 4 This is a front view of a dual-needle spot welding machine provided for an embodiment of the present invention.

[0028] Figure label:

[0029] 10-Bracket; 11-Guide rail; 20-Cylinder; 30-Holding component; 31-Upper plate; 32-Lower plate; 33-Slider; 40-Guide post; 41-Limiting block; 42-Guide cylinder; 50-Spring; 60-Positioning component; 61-Mounting component; 611-Elastic arm; 612-Clamping slot; 613-Limiting groove; 62-Fixing component; 100-Welding needle; 200-First workpiece; 201-Stepped surface; 300-Second workpiece. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0033] like Figures 1 to 4 As shown, an embodiment of this utility model discloses a double-needle spot welding machine, which includes: a bracket 10, a cylinder 20, a holding component 30, a guide column 40, a positioning component 60, and a welding needle 100.

[0034] A bracket 10 is fixed to a robotic arm, and a vertically extending guide rail 11 is configured on the bracket 10. A cylinder 20 is fixed to the top of the bracket 10. The holding component 30 includes an upper plate 31, a lower plate 32, and a vertical plate integrally formed with the upper plate 31 and the lower plate 32. A slider 33 is fixed to the back of the vertical plate, and the slider 33 cooperates with the guide rail 11 of the bracket 10 to allow the holding component 30 to move vertically. The cylinder 20 is connected to the holding component 30 via a piston rod to drive the holding component 30 to move vertically.

[0035] The guide post 40 includes two guide posts 40 arranged side by side, and both guide posts 40 pass through the lower plate 32 and slide in cooperation with the lower plate 32. The lower end of the guide post 40 extends out of the lower plate 32. Two guide cylinders 42 are fixed on the upper plate 31 of the retaining component 30, and the upper ends of the two guide posts 40 extend into the two guide cylinders 42 respectively.

[0036] Limiting blocks 41 are fixed on the sections of the guide posts 40 between the upper plate 31 and the lower plate 32. The limiting blocks 41 on the two guide posts 40 are positioned symmetrically, so that the maximum extension of the lower ends of the two guide posts 40 beyond the lower plate 32 is the same. A spring 50 is fitted on each guide post 40 between the upper plate 31 and the lower plate 32. The upper end of the spring 50 abuts against the lower end face of the guide cylinder 42, and the lower end of the spring 50 abuts against the limiting block 41. Thus, the spring 50 applies a downward elastic force to the guide post 40 through the limiting block 41, so that the lower ends of the two guide posts 40 are kept in the state of maximum extension. Preferably, a long spring 50 with more coils is selected as the above-mentioned spring 50, so that the elastic force applied by the spring 50 does not change much when the compression of the spring 50 changes.

[0037] The positioning component 60 includes two parts, which are respectively fixed to the lower ends of the two guide posts 40. The welding needle 100 includes two parts, which are respectively installed side by side on the two positioning components 60, and the distance between the two welding needles 100 is consistent with the horizontal distance between the target positions of the two stepped surfaces 201 of the workpiece to be welded.

[0038] The following describes the welding process of the workpiece using the aforementioned spot welding machine.

[0039] like Figure 4 As shown, the workpieces to be welded include a first workpiece 200 and a second workpiece 300. The first workpiece 200 is a horizontally placed plate-shaped workpiece with two stepped surfaces 201, and the second workpiece 300 is a vertically placed plate-shaped workpiece with two stepped surfaces 201 that match the two stepped surfaces 201. The distance between the target positions on the two stepped surfaces 201 on the first workpiece 200 is the same as the distance between the two welding needles 100 on the spot welding machine.

[0040] When welding needs to be performed at two target locations, the robotic arm drives the spot welding machine to move above and close to the first workpiece 200, so that the lower ends of the two welding needles 100 are aligned with the target positions of the two stepped surfaces 201 respectively. Then, the cylinder 20 drives the holding component 30 to move down, so that the two welding needles 100 are close to the two target positions. The welding needle 100 corresponding to the higher stepped surface 201 first contacts the higher stepped surface 201. Instantly after, the welding needle 100 corresponding to the lower stepped surface 201 contacts the lower stepped surface 201. Thus, by means of the two springs 50, different compression amounts are generated, so that the two welding needles 100 simultaneously perform welding on the target positions of the two stepped surfaces 201. Furthermore, the springs 50 not only provide buffering for the contact between the welding needles 100 and the workpiece, but also provide continuous preload for the contact between the welding needles 100 and the workpiece.

[0041] In some preferred configurations, the positioning component 60 includes a fixing component 62 and a mounting component 61, both of which are rectangular block structures. The fixing component 62 is fixed to the lower end of the guide post 40, and the mounting component 61 is fixed to the fixing component 62. The welding needle 100 is mounted on the mounting component 61. An elastic arm 611 and a clamping slot 612 are obtained by cutting the front side of the mounting component 61. The side wall of the elastic arm 611 serves as one wall of the clamping slot 612. The welding needle 100 passes through the clamping slot 612 and is clamped by the elastic arm 611. A limiting groove 613 is also provided at the clamping slot 612 to restrict the lateral movement of the welding needle 100. Thus, the elastic arm 611 applies a preload to the welding needle 100 by clamping it, thereby enabling the welding needle 100 to withstand a certain axial force. If the axial force is exceeded, the welding needle 100 will retract. Therefore, when the welding needle 100 contacts the workpiece with excessive contact force and is not used for welding, the actual axial force of the workpiece on the welding needle 100 exceeds the set axial force and retracts, thereby avoiding the welding effect from deterioration or failure due to excessive contact force.

[0042] Furthermore, although exemplary embodiments have been described in this invention, its scope includes any and all embodiments based on this invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, which will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0043] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments can be used by those skilled in the art when reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature not claimed is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is an independent, separate embodiment, and these embodiments are contemplated to be combined with each other in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0044] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A double-needle spot welding machine, characterized in that, include: The bracket is equipped with vertically extending guide rails; A retaining component with a slider fixed thereon, the retaining component being able to move vertically through the slider engaging with the slide rail of the bracket; A drive mechanism for driving the holding component to move vertically to bring it closer to or away from the workpiece; The guide post includes two guide posts arranged side by side and both slidingly engaged with the retaining member. The lower end of each guide post extends beyond the lower end of the retaining member. Each guide post is fitted with a spring, which applies a downward elastic force to the guide post. The positioning component includes two components, which are respectively fixed below the two guide posts. Two welding pins are respectively mounted on the two positioning components, and the distance between the two welding pins is configured to be consistent with the distance between the target positions of the two stepped surfaces of the workpiece.

2. The dual-needle spot welding machine according to claim 1, characterized in that, The retaining component has an upper plate and a lower plate spaced apart. The upper plate has two guide cylinders fixed to it. The upper ends of the two guide posts extend into the two guide cylinders respectively. The two guide posts pass through the lower plate and slide in cooperation with it.

3. The dual-needle spot welding machine according to claim 2, characterized in that, The spring is sleeved on the section of the guide post between the upper plate and the lower plate.

4. The dual-needle spot welding machine according to claim 3, characterized in that, A limiting block is fixed on the guide post above the lower plate, and the limiting block is used to limit the distance of the positioning component relative to the lower plate.

5. The dual-needle spot welding machine according to claim 4, characterized in that, The distance between the two positioning components and the lower plate is made consistent by adjusting the limiting block on the guide post.

6. The dual-needle spot welding machine according to claim 1, characterized in that, The positioning component includes a fixing component and an mounting component, both of which are rectangular block structures. The fixing component is fixed to the lower end of the guide post, the mounting component is fixed on the fixing component, and the welding pin is mounted on the mounting component.

7. The dual-needle spot welding machine according to claim 6, characterized in that, An elastic arm and a clamping slot are obtained by cutting the front side of the mounting component, the sidewall of the elastic arm serving as a wall of the clamping slot, and the welding needle passing through the clamping slot and being clamped by the elastic arm.

8. The dual-needle spot welding machine according to claim 7, characterized in that, The clamping seam is also equipped with a limiting groove to restrict the lateral movement of the welding needle.

9. The dual-needle spot welding machine according to claim 1, characterized in that, The driving mechanism is a cylinder.

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