An environment-friendly welding device for cabinet processing

Abstract

The present invention relates to the technical field of welding devices, and specifically provides an environmentally friendly welding device for cabinet processing, including a machine base, an upper electrode and a lower electrode are arranged on the machine base, and a protective cover is arranged on the upper electrode. By arranging the protective cover on the upper electrode, when the upper electrode is close to the plate to be welded, the protective cover can press the plate to be welded and thus position the single plate to be welded, and a movable disk that can slide axially is arranged in the protective cover, so that a negative pressure is formed between the movable disk and the plate to be welded, so that the protective cover can adsorb the plate to be welded, and when the upper electrode is away from the plate to be welded, it can adsorb the plate to be welded and thus detect whether there is a cold weld, and the protective cover can also play a protective role, which can prevent sparks from flying and avoid affecting the roughness of other areas of the plate to be welded.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, in particular to an environmentally friendly welding device for cabinet processing. Background Art

[0002] Cabinet processing welding equipment is generally used for welding metal cabinets, cabinets, electric control cabinets, etc., and usually has efficient, precise and stable welding capabilities.

[0003] For example, Chinese patent CN102114572A discloses a spot welding machine, which includes a fixed platform, an upper electrode and a lower electrode, as well as a table for placing the workpiece to be welded and a driving mechanism for driving the table to move up and down. The table is located between the fixed platform and the upper electrode, and a through hole corresponding to the lower electrode is opened on the table. The solution controls the descent of the table by applying force to the workpiece to be welded by the upper electrode. When the workpiece to be welded touches the lower electrode and starts spot welding, as the upper electrode stops moving downward, the table stops descending at the same time, so that both the upper electrode and the lower electrode can contact the workpiece to be welded to complete the spot welding operation.

[0004] However, in the above scheme, after spot welding, the workpiece to be welded is not detected for cold welds, and the welding quality cannot be judged. In addition, the workpiece to be welded is not positioned before spot welding, which may cause the workpiece to be welded to be misaligned and thus affect the welding quality of the workpiece to be welded. Summary of the Invention

[0005] Based on this, it is necessary to provide an environmentally friendly welding device for cabinet processing to address the problem that current spot welding machines cannot detect cold welds during welding and have poor welding quality.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An environmentally friendly welding device for cabinet processing, comprising:

[0008] A machine base, wherein a workbench is provided on the machine base, a carrying plate is provided on the workbench, the carrying plate can absorb the plate to be welded, a lower electrode is vertically provided on the workbench, and the upper end of the lower electrode can contact the lower end surface of the plate to be welded;

[0009] An upper electrode, the upper electrode and the lower electrode are coaxially arranged on the machine base, and the upper electrode can move in a vertical direction to contact the upper end surface of the plate to be welded;

[0010] A protective cover, wherein the lower end of the protective cover has an opening, the upper end of the protective cover is coaxially connected to the upper electrode and can slide axially relative to the upper electrode, a first elastic member is connected between the upper end of the protective cover and the upper electrode, the lower end surface of the protective cover is initially located below the lower end of the upper electrode, and when the upper electrode moves downward relative to the protective cover, the first elastic member stores energy, and the stored energy of the elastic member pushes the protective cover to press against the upper end surface of the plate to be welded;

[0011] When the upper electrode contacts the upper end surface of the plate to be welded in the vertical direction, the lower end of the protective cover first contacts the upper end surface of the plate to be welded, and the first elastic member is stretched to give the protective cover a force to press the plate to be welded;

[0012] A movable disk, wherein the movable disk is slidingly and sealingly disposed in the protective cover, and a first telescopic cylinder is disposed between the movable disk and the upper electrode, and the first telescopic cylinder is capable of pushing or pulling the movable disk to move axially along the protective cover;

[0013] The first telescopic cylinder is configured to push the movable disk toward the plate to be welded to discharge the gas between the movable disk and the plate to be welded when the protective cover contacts the plate to be welded, and to pull the movable disk away from the plate to be welded before the upper electrode detaches from the plate to be welded so that negative pressure is formed between the movable disk and the plate to be welded.

[0014] Furthermore, a sensing component is provided on the protective cover, which can sense the thickness of the plate to be welded to adjust the axial movement distance of the movable disk driven by the first telescopic cylinder. The axial movement distance of the movable disk is positively correlated with the thickness of the plate to be welded.

[0015] Furthermore, the sensing assembly includes a second telescopic cylinder and a hydraulic oil pipe, the second telescopic cylinder is vertically arranged on the outer periphery of the protective cover, and the rod cavity of the second telescopic cylinder is connected to the rodless cavity of the first telescopic cylinder through the hydraulic oil pipe;

[0016] The second telescopic cylinder is configured so that the telescopic end is initially flush with the lower end of the protective cover, and the telescopic end stops extending when the lower end of the protective cover contacts the plate to be welded.

[0017] Furthermore, a one-way exhaust valve is provided on the movable disk, and the one-way exhaust valve allows the gas between the movable disk and the plate to be welded to be discharged.

[0018] Furthermore, a sealing rubber sleeve is fixedly connected to the lower end surface of the protective cover.

[0019] Furthermore, a second elastic member is sleeved on the periphery of the lower electrode, one end of the second elastic member is fixedly connected to the workbench, and the other end of the second elastic member is fixedly connected to the supporting plate, and the supporting plate and the lower electrode can slide axially relative to each other.

[0020] Furthermore, a third elastic member is connected between the lower end of the movable disk and the upper electrode near the lower end.

[0021] Furthermore, a telescopic cylinder is fixedly provided on the machine base, the telescopic cylinder is vertically arranged, and the telescopic end of the telescopic cylinder is connected to the upper electrode.

[0022] Furthermore, a plurality of adsorption holes are provided on the supporting plate, an air pump is connected to the outer side of the supporting plate, and the plurality of adsorption holes are all in communication with the air pump.

[0023] Furthermore, a control box is provided on the machine base.

[0024] The beneficial effects of the present invention are:

[0025] The present invention provides a protective cover on the upper electrode, so that when the upper electrode is close to the plate to be welded, the protective cover can press the plate to be welded and thus position the plate to be welded, and a movable disk that can slide axially is provided in the protective cover, so that negative pressure is formed between the movable disk and the plate to be welded, so that the protective cover can adsorb the plate to be welded. When the upper electrode is away from the plate to be welded, it can adsorb the plate to be welded and thus detect whether there is a cold weld. The protective cover can also play a protective role, which can prevent sparks from flying and avoid affecting the roughness of other areas of the plate to be welded.

[0026] The present invention provides a sensing component to sense the thickness of the plate to be welded and then adaptively adjusts the adsorption force of the protective cover on the plate to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of an environmentally friendly welding device for cabinet processing provided by one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A left side view of an environmentally friendly welding device for cabinet processing provided in one embodiment;

[0029] Figure 3 for Figure 2 A cross-sectional view of an environmentally friendly welding device for cabinet processing provided in an embodiment of the present invention taken along AA when not welding;

[0030] Figure 4 for Figure 2 A cross-sectional view taken along AA during welding of an environmentally friendly welding device for cabinet processing provided in one embodiment;

[0031] Figure 5 for Figure 3 A partial enlarged view of the X portion of the environmentally friendly welding device for cabinet processing provided in one embodiment when no welding is performed;

[0032] Figure 6 for Figure 4 A partial enlarged view of the Y portion during welding of an environmentally friendly welding device for cabinet processing provided in one embodiment.

[0033] in:

[0034] 100, machine base; 110, workbench; 120, carrying plate; 130, adsorption hole; 140, sensing end; 150, upper electrode; 160, lower electrode; 170, telescopic cylinder; 180, vacuum pump; 190, control box;

[0035] 200, protective cover; 210, sealing rubber sleeve; 220, movable plate; 230, one-way air release valve; 240, first telescopic cylinder; 250, rodless chamber; 260, first elastic member; 270, second telescopic cylinder; 280, rod chamber;

[0036] 300, second elastic member; 310, third elastic member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0039] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] Refer to the following Figures 1-6 To describe an environmentally friendly welding device for cabinet processing provided by the present invention.

[0041] An environmentally friendly welding device for cabinet processing is suitable for welding plates, including a machine base 100, a workbench 110 is provided on the machine base 100, a carrying plate 120 is provided on the workbench 110, the carrying plate 120 is used to place the plates to be welded, and the carrying plate 120 can adsorb the plates to be welded, and there are two plates to be welded, the two plates to be welded are superimposed on each other, and the carrying plate 120 adsorbs the lower end surface of the plate to be welded below, and a lower electrode 160 is also provided on the workbench 110, the top of the lower electrode 160 can contact the lower end surface of the plate to be welded below, and an upper electrode 150 coaxial with the lower electrode 160 is provided on the machine base 100, and the upper electrode 150 can move in the vertical direction so as to contact the upper end surface of the plate to be welded above, when the upper electrode 15 When the upper and lower electrodes 0 and 160 respectively contact the two plates to be welded, current can be passed through the two plates to be welded. The current causes the contact position of the two plates to be welded to melt instantly, thereby welding the two plates to be welded together. In the welding process, the existing technology does not position the two plates to be welded, but only fixes the lower plate to be welded. Therefore, the two plates to be welded will be misaligned during welding, so that the welding positions of the two plates to be welded do not correspond, resulting in unqualified welding of the two plates to be welded, thereby affecting the welding efficiency, and cold welding may occur during welding. Therefore, it is necessary to detect whether there is a cold welding phenomenon in time to avoid affecting the welding quality. The existing technology does not have a device for detecting cold welding, which leads to uncertain welding quality and affects the connection strength of the plates to be welded.

[0042] Therefore, in order to address the above problems, the present invention provides a protective cover 200 slidingly provided on the upper electrode 150, the lower end of the protective cover 200 has an opening, the upper end of the protective cover 200 is coaxially connected to the upper electrode 150, and a first elastic member 260 is connected between the upper end of the protective cover 200 and the upper electrode 150, the first elastic member 260 connects the upper end of the protective cover 200 and the upper electrode 150, and in the process of the upper electrode 150 moving toward the upper end face of the plate to be welded, the lower end of the protective cover 200 first contacts the upper end face of the plate to be welded, thereby stretching the first elastic member 260. When the first elastic member 260 is stretched, it exerts a force on the protective cover 200 to press the plate to be welded, thereby pressing the upper plate to be welded tightly against the lower plate to be welded, that is, the protective cover 200 positions the two plates to be welded, and then when the upper electrode 150 contacts the upper plate to be welded, the two plates to be welded can be welded together without any misalignment.

[0043] At the same time, a movable disk 220 is provided in a sliding and sealing manner within the protective cover 200. A first telescopic cylinder 240 is provided between the upper end surface of the movable disk 220 and the upper electrode 150. The first telescopic cylinder 240 can push or pull the movable disk 220 to move axially within the protective cover 200 by telescoping. The first telescopic cylinder 240 is configured as follows:

[0044] During the movement of the upper electrode 150 toward the upper end surface of the plate to be welded, and when the lower end of the protective cover 200 contacts the upper end surface of the plate to be welded, the first telescopic cylinder 240 begins to extend, thereby pushing the movable disk 220 to move in the protective cover 200 toward the plate to be welded. At this time, the gas between the movable disk 220 and the plate to be welded will be discharged; when the upper electrode 150 contacts the upper end of the plate to be welded and the welding is completed and before the upper electrode 150 needs to be separated from the plate to be welded, the second telescopic cylinder 270 is shortened to pull the movable disk 220 away from the plate to be welded. The upper electrode 150 moves in the direction of the plate to be welded, thereby forming a negative pressure between the movable disk 220 and the plate to be welded, and the protective cover 200 can absorb the upper end of the plate to be welded. As the upper electrode 150 gradually separates from the plate to be welded, the upper electrode 150 drives the protective cover 200 to move in the direction away from the plate to be welded. Since the protective cover 200 absorbs the upper plate to be welded, and the supporting plate 120 absorbs the lower plate to be welded, the upper electrode 150 can pull the protective cover 200 when moving. The protective cover 200 applies tension to the upper plate to be welded to detect whether there is a cold weld between the two plates to be welded.

[0045] It can be understood that since the protective cover 200 adsorbs the upper plate to be welded, when the upper electrode 150 pulls the protective cover 200, if the protective cover 200 is separated from the upper plate to be welded, it means that the connection strength of the two plates to be welded is relatively high, and there is no cold weld. If the protective cover 200 adsorbs the upper plate to be welded and separates from the lower plate to be welded, and the two plates to be welded are separated, it means that the connection strength of the two plates to be welded is insufficient, indicating that there is a cold weld.

[0046] It should be noted that the protective cover 200 in the present invention can also play a protective role. Sparks will be generated during the welding process of two plates to be welded. The splashes will not only burn the skin of the workers, but also have a certain impact on the surface roughness of the plates to be welded. The provision of the protective cover 200 can prevent sparks from flying and avoid affecting the roughness of other areas of the plates to be welded.

[0047] In order to facilitate the protective cover 200 to push the upper plate to be welded when the first elastic member 260 is stretched, this embodiment directly connects one end of the first elastic member 260 to the upper end surface of the movable disk 220, and the other end of the first elastic member 260 is connected to the upper end of the protective cover 200. The movable disk 220 is coaxial with the upper electrode 150 and is slidably connected. A limiting protrusion is provided on the upper electrode 150. The limiting protrusion limits the maximum distance that the movable disk 220 can move relative to the upper electrode 150. When the upper electrode 150 moves downward, the limiting protrusion can push the movable disk 220 downward and thereby stretch the first elastic member 260.

[0048] Specifically, in order to achieve the goal of discharging the gas between the movable disk 220 and the plate to be welded when the movable disk 220 approaches the plate to be welded, and to form a negative pressure between the movable disk 220 and the plate to be welded when the movable disk 220 is away from the plate to be welded, a one-way air release valve 230 is provided on the movable disk 220. The one-way air release valve 230 only allows the gas to be discharged from between the movable disk 220 and the plate to be welded, and does not allow the gas to enter between the movable disk 220 and the plate to be welded, thereby forming a negative pressure between the movable disk 220 and the plate to be welded, so that the upper electrode 150 can absorb the plate to be welded above through the protective cover 200 during the upward movement, so as to detect whether there is a cold weld phenomenon. If there is a cold weld, the two plates to be welded need to be re-welded, and then tested again after the welding is completed until there is no cold weld phenomenon.

[0049] In a further embodiment, the protective cover 200 is provided with a sensing component that can sense the thickness of the sheet to be welded and thereby adjust the distance by which the first telescopic cylinder 240 pushes or pulls the movable plate 220 to move axially within the protective cover 200. The axial movement distance of the movable plate 220 is positively correlated with the thickness of the sheet to be welded. It is understood that the thicker the sheet to be welded, the greater the weld strength required. Therefore, greater force is required to detect whether there is a cold weld between the two, which in turn requires greater suction force from the protective cover 200 on the sheet to be welded above to prevent inaccurate detection.

[0050] Specifically, the sensing assembly in this embodiment includes a second telescopic cylinder 270 and a hydraulic oil pipe (not shown in the figure). The second telescopic cylinder 270 is vertically arranged on the outer periphery of the protective cover 200, and the rod chamber 280 of the second telescopic cylinder 270 is connected to the rodless chamber 250 of the first telescopic cylinder 240 through the hydraulic oil pipe, so that the first telescopic cylinder 240 can be controlled by the second telescopic cylinder 270. When the second telescopic cylinder 270 is extended, the oil in the rod chamber 280 can be transported to the rodless chamber 250 in the first telescopic cylinder 240 through the hydraulic oil pipe, thereby pushing the telescopic end of the first telescopic cylinder 240 to extend, and the thickness of the plate to be welded can be detected during the extension of the telescopic end of the second telescopic cylinder 270. A sensing end 140 is provided on the carrier plate 120. The two plates to be welded on the carrier plate 120 will not block the sensing end 140. When the lower end of the protective cover 200 does not contact the plate to be welded, as shown Figure 5 As shown, the telescopic end of the second telescopic cylinder 270 is flush with the lower end of the protective cover 200. When the lower end of the protective cover 200 contacts the plate to be welded, the telescopic end of the second telescopic cylinder 270 begins to extend, and the second telescopic cylinder 270 drives the first telescopic cylinder 240 to extend synchronously. The telescopic end of the second telescopic cylinder 270 stops after it abuts against the sensing end 140 of the carrier plate 120. The specific state is as shown in FIG. Figure 6 As shown, the distance that the telescopic end of the second telescopic cylinder 270 is extended is positively correlated with the thickness of the plate to be welded.

[0051] It can be understood that, the greater the thickness of the plate to be welded, the longer the telescopic end of the second telescopic cylinder 270 needs to be extended before it can contact the sensing end 140; and the smaller the thickness of the plate to be welded, the shorter the telescopic end of the second telescopic cylinder 270 needs to be extended before it can contact the sensing end 140. Since the first telescopic cylinder 240 and the second telescopic cylinder 270 are extended synchronously, the thicker the thickness of the plate to be welded, the greater the distance the first telescopic cylinder 240 drives the movable disk 220 to move axially, thereby causing more gas to be discharged between the movable disk 220 and the plate to be welded, and a greater negative pressure is formed between the movable disk 220 and the plate to be welded, thereby increasing the adsorption force of the protective cover 200 on the plate to be welded. If the thickness of the plate to be welded is smaller, the axial movement distance driven by the first telescopic cylinder 240 to move the movable disk 220 is reduced, thereby reducing the adsorption force of the protective cover 200 on the plate to be welded, but does not affect the detection of cold welds in the plate to be welded.

[0052] In a further embodiment, in order to improve the airtightness of the protective cover 200 when it is adsorbed with the plate to be welded, a sealing rubber sleeve 210 is fixedly connected to the lower end of the protective cover 200. The shape of the sealing rubber sleeve 210 is adapted to the shape of the opening at the lower end of the protective cover 200. The sealing rubber sleeve 210 can increase the airtightness between the protective cover 200 and the plate to be welded.

[0053] It should be noted that if Figure 5 and Figure 6 As shown, the cross-section of the sealing rubber sleeve 210 in this embodiment is an inverted T-shape, and the upper end of the inverted T-shaped sealing rubber sleeve 210 is a circular ring, which is fixedly connected to the lower end of the protective cover 200, and the lower end face of the inverted T-shape is also a circular ring. The outer diameter of the circular ring on the lower end face is larger than the outer diameter of the circular ring on the upper end face, and the inner diameter of the circular ring on the lower end face of the inverted T-shape is smaller than the inner diameter of the circular ring on the upper end face, thereby increasing the contact area between the sealing rubber sleeve 210 and the plate to be welded, which can further improve the air tightness.

[0054] In a further embodiment, the supporting plate 120 of the present invention can move in the vertical direction so that the lower electrode 160 can fully contact the lower end surface of the plate to be welded, thereby avoiding uneven contact between the lower electrode 160 and the lower end of the plate to be welded due to wear of the lower electrode 160.

[0055] Specifically, a second elastic member 300 is sleeved on the outer periphery of the lower electrode 160 in this embodiment, one end of the second elastic member 300 is fixedly connected to the workbench 110, and the other end of the second elastic member 300 is connected to the lower end surface of the supporting plate 120. When the plate to be welded is placed on the supporting plate 120, the second elastic member 300 is subjected to a certain compression. At this time, the lower electrode 160 does not contact the lower end surface of the plate to be welded. Only when the upper electrode 150 drives the protective cover 200 to move toward the direction close to the plate to be welded and continuously squeezes the plate to be welded, the plate to be welded pushes the supporting plate 120 to move downward, and the second elastic member 300 at the lower end of the supporting plate 120 is further compressed until the upper end of the upper electrode 150 is completely in contact with the lower end of the plate to be welded below, and the supporting plate 120 no longer continues to compress the second elastic member 300.

[0056] By setting the above-mentioned second elastic member 300, the lower electrode 160 can fully contact the plate to be welded even when the upper end is worn. If a vertically movable supporting plate 120 is not provided but a fixed position supporting plate 120 is provided, then when the lower electrode 160 is worn, the plate to be welded cannot fully contact the lower electrode 160, thereby affecting the welding quality.

[0057] Specifically, in order to realize the function of enabling the upper electrode 150 to move in the vertical direction, a telescopic cylinder 170 is provided on the machine base 100. The telescopic cylinder 170 is vertically arranged, and the fixed end of the telescopic cylinder 170 is fixedly connected to the machine base 100. The telescopic end of the telescopic cylinder 170 is connected to the upper electrode 150. The telescopic cylinder 170 can drive the upper electrode 150 to move closer to or away from the lower electrode 160 by telescoping.

[0058] Specifically, a plurality of adsorption holes 130 are provided on the upper end surface of the carrier plate 120 in this embodiment, and an air pump 180 is fixedly connected to the outer side of the carrier plate 120. The air pump 180 is communicated with the plurality of adsorption holes 130. When the air pump 180 is working, the plurality of adsorption holes 130 can absorb air, thereby adsorbing the lower plate to be welded placed on the carrier plate 120 on the carrier plate 120 to perform a positioning function.

[0059] Specifically, a third elastic member 310 is further provided between the lower end surface of the movable disk 220 and the upper electrode 150. One end of the third elastic member 310 is connected to the lower end surface of the movable disk 220, and the other end of the third elastic member 310 is connected to the upper electrode 150. When the first telescopic cylinder 240 extends to push the movable disk 220 to move closer to the plate to be welded, the third elastic member 310 can be compressed. When the first telescopic cylinder 240 is shortened, the third elastic member 310 can give the movable disk 220 a resetting force, thereby reducing the load when the second telescopic cylinder 270 is shortened.

[0060] Specifically, a control box 190 is provided on the machine base 100 , and the control box 190 can adjust the current of the upper electrode 150 and the lower electrode 160 .

[0061] It should be noted that, in this embodiment, the first elastic member 260 is a tension spring, and the second elastic member 300 and the third elastic member 310 are compression springs.

[0062] The specific working process of an environmentally friendly welding device for cabinet processing provided by the present invention is described in combination with the above embodiments:

[0063] Installation positioning:

[0064] The two plates to be welded are stacked on the supporting plate 120 of the workbench 110. When the two plates to be welded are placed on the supporting plate 120, gravity can compress the second elastic member 300 so that the upper end of the lower electrode 160 moves toward the direction close to the lower end surface of the plate to be welded below, but does not touch it. At this time, the vacuum pump 180 is started. The vacuum pump 180 draws air so that the multiple adsorption holes 130 on the supporting plate 120 can adsorb the lower end surface of the plate to be welded below, thereby positioning the plate to be welded below on the supporting plate 120.

[0065] Secondary positioning:

[0066] The telescopic cylinder 170 is started, and the telescopic end of the telescopic cylinder 170 extends to drive the upper electrode 150 and the protective cover 200 to move toward the upper end surface of the upper plate to be welded. The lower end of the protective cover 200 first contacts the upper end surface of the upper plate to be welded. The telescopic end of the telescopic cylinder 170 continues to extend, causing the upper electrode 150 to continue to move downward, and the lower end of the protective cover 200 contacts the upper plate to be welded, so the protective cover 200 pushes the two plates to be welded downward and compresses the second elastic member 300 at the bottom of the supporting plate 120. When the upper end of the lower electrode 160 completely abuts the lower end surface of the lower plate to be welded, the supporting plate 120 is restricted from continuing to move downward. At this time, the upper electrode 150 continues to move, and the first elastic member 260 between the upper electrode 150 and the protective cover 200 is stretched. The first elastic member 260 gives the protective cover 200 a force to press the upper plate to be welded, thereby positioning the two plates to be welded.

[0067] exhaust:

[0068] The second telescopic cylinder 270 is started, and the telescopic end of the second telescopic cylinder 270 is extended. The oil in the rod chamber 280 of the second telescopic cylinder 270 enters the rodless chamber 250 of the first telescopic cylinder 240 through the hydraulic oil pipe (not shown in the figure), thereby driving the telescopic end of the first telescopic cylinder 240 to extend synchronously.

[0069] If the thickness of the two plates to be welded is relatively thick, the telescopic end of the second telescopic cylinder 270 needs to be extended a longer distance when it abuts the sensing end 140 on the supporting plate 120. At the same time, the telescopic end of the first telescopic cylinder 240 drives the movable disk 220 to move a longer distance in the protective cover 200 toward the upper end surface of the upper plate to be welded. The one-way air relief valve 230 on the movable disk 220 can discharge the gas between the movable disk 220 and the upper plate to be welded. When the telescopic end of the second telescopic cylinder 270 abuts the sensing end 140 on the supporting plate 120, it stops working, and at this time, the first telescopic cylinder 240 also stops working.

[0070] If the thickness of the two plates to be welded is relatively thin, the telescopic end of the second telescopic cylinder 270 needs to be extended a shorter distance when it abuts the sensing end 140 on the carrier plate 120. At the same time, the telescopic end of the first telescopic cylinder 240 drives the movable disk 220 to move a shorter distance in the protective cover 200 toward the upper end surface of the upper plate to be welded. The one-way air relief valve 230 on the movable disk 220 can discharge the gas between the movable disk 220 and the upper plate to be welded. When the telescopic end of the second telescopic cylinder 270 abuts the sensing end 140 on the carrier plate 120, it stops working, and at this time, the first telescopic cylinder 240 also stops working.

[0071] welding:

[0072] The upper electrode 150 continues to move toward the upper end surface of the upper plate to be welded. When the upper electrode 150 contacts the upper end surface of the upper plate to be welded, current passes through rapidly to generate high temperature, and the contact parts melt and are then welded together.

[0073] Detection of cold solder joints:

[0074] After welding is completed, the telescopic end of the second telescopic cylinder 270 begins to shorten, and the liquid in the rodless chamber 250 of the first telescopic cylinder 240 flows back into the rod chamber 280 of the second telescopic cylinder 270, causing the telescopic end of the first telescopic cylinder 240 to shorten. The telescopic end of the first telescopic cylinder 240 drives the movable disk 220 to move in the direction away from the upper plate to be welded. At the same time, the third elastic member 310 under the movable disk 220 assists in pushing the movable disk 220 to move to reduce the load of the second telescopic cylinder 270. After the movable disk 220 moves away from the upper plate to be welded, the air pressure between the movable disk 220 and the upper plate to be welded decreases and is in a negative pressure state. If the thickness of the plate to be welded is thicker, the movable disk 220 moves a longer distance, causing the protective cover 200 to adsorb the upper plate to be welded. The force on the upper end surface of the plate is relatively large; if the thickness of the plate to be welded is relatively thin, the movable disk 220 moves a shorter distance, thereby reducing the force of the protective cover 200 adsorbing the upper end surface of the upper plate to be welded, and the telescopic end of the telescopic cylinder 170 is shortened, thereby pulling the upper electrode 150 upward, and the upper electrode 150 moves upward to compress the third elastic member 310. After the third elastic member 310 is compressed to the limit, the negative pressure of the movable disk 220 drives the protective cover 200 to move. Under the pull of the upper electrode 150, if the protective cover 200 is separated from the upper plate to be welded, it means that the connection strength of the two plates to be welded is relatively high, and there is no cold welding phenomenon. If the protective cover 200 drives the upper plate to be welded to separate from the lower plate to be welded, it means that there is a cold welding phenomenon and re-welding is required.

[0075] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An environmentally friendly welding device for cabinet processing, characterized in that: include: A machine base, wherein a workbench is provided on the machine base, a carrying plate is provided on the workbench, the carrying plate can absorb the plate to be welded, a lower electrode is vertically provided on the workbench, and the upper end of the lower electrode can contact the lower end surface of the plate to be welded; An upper electrode, the upper electrode and the lower electrode are coaxially arranged on the machine base, and the upper electrode can move in a vertical direction to contact the upper end surface of the plate to be welded; A protective cover, wherein the lower end of the protective cover has an opening, the upper end of the protective cover is coaxially connected to the upper electrode and can slide axially relative to the upper electrode, a first elastic member is connected between the upper end of the protective cover and the upper electrode, the lower end face of the initial protective cover is located below the lower end of the upper electrode, when the upper electrode moves downward relative to the protective cover, the first elastic member stores energy, and the elastic member stores energy to push the protective cover to press against the upper end face of the plate to be welded; a movable disk, the movable disk is slidingly sealed and arranged in the protective cover, a first telescopic cylinder is arranged between the movable disk and the upper electrode, and the first telescopic cylinder can push or pull the movable disk to move axially along the protective cover; The first telescopic cylinder is configured to push the movable disk toward the plate to be welded to discharge the gas between the movable disk and the plate to be welded when the protective cover contacts the plate to be welded, and to pull the movable disk away from the plate to be welded before the upper electrode detaches from the plate to be welded so that negative pressure is formed between the movable disk and the plate to be welded.

2. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: The protective cover is provided with a sensing component, which can sense the thickness of the plate to be welded to adjust the axial movement distance of the movable disk driven by the first telescopic cylinder. The axial movement distance of the movable disk is positively correlated with the thickness of the plate to be welded.

3. The environmentally friendly welding device for cabinet processing according to claim 2, characterized in that: The sensing assembly includes a second telescopic cylinder and a hydraulic oil pipe, wherein the second telescopic cylinder is vertically arranged on the outer periphery of the protective cover, and the rod cavity of the second telescopic cylinder is connected to the rodless cavity of the first telescopic cylinder through the hydraulic oil pipe; The second telescopic cylinder is configured so that the telescopic end is initially flush with the lower end of the protective cover, and the telescopic end stops extending when the lower end of the protective cover contacts the plate to be welded.

4. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: The movable disk is provided with a one-way exhaust valve, which allows the gas between the movable disk and the plate to be welded to be exhausted.

5. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: A sealing rubber sleeve is fixedly connected to the lower end surface of the protective cover.

6. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: A second elastic member is sleeved on the periphery of the lower electrode, one end of the second elastic member is fixedly connected to the workbench, and the other end of the second elastic member is fixedly connected to the supporting plate. The supporting plate and the lower electrode can slide axially relative to each other.

7. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: A third elastic member is connected between the lower end of the movable disk and a position of the upper electrode close to the lower end.

8. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: A telescopic cylinder is fixedly arranged on the machine base, the telescopic cylinder is arranged vertically, and the telescopic end of the telescopic cylinder is connected to the upper electrode.

9. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: The supporting plate is provided with a plurality of adsorption holes, an outer side of the supporting plate is connected to an air pump, and the plurality of adsorption holes are all communicated with the air pump.

10. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that: A control box is arranged on the machine base.

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