Environment-friendly welding device for cabinet machining

Abstract

The invention relates to the technical field of welding devices, in particular to an environment-friendly welding device for cabinet machining, which comprises a base, an upper electrode and a lower electrode are arranged on the base, and a protective cover is arranged on the upper electrode. The protective cover can abut against the to-be-welded plates so as to position the single to-be-welded plates, and the movable disc capable of axially sliding is arranged in the protective cover, so that negative pressure is formed between the movable disc and the to-be-welded plates, and then the protective cover can adsorb the to-be-welded plates. When the upper electrode is far away from the to-be-welded plate, the to-be-welded plate can be adsorbed, then whether pseudo soldering exists or not can be detected, the protective cover can play a role in protection, sparks can be prevented from splashing, and meanwhile the roughness of other areas of the to-be-welded plate is prevented from being affected.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and particularly to an environment-friendly welding device for cabinet processing. Background Art

[0002] Welding devices for cabinet processing are generally used for welding and processing of metal cabinets, instrument cabinets, electric control cabinets, etc., and usually have efficient, accurate and stable welding capabilities.

[0003] For example, Chinese Patent CN102114572A discloses a spot welder. The solution includes a fixed platform, an upper electrode and a lower electrode, and also includes a table for placing a 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, and when the workpiece to be welded touches the lower electrode and starts spot welding, as the upper electrode stops moving down, the table also stops descending simultaneously, 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 solution, the workpiece to be welded is not subjected to false welding detection after spot welding, and the welding quality cannot be judged. Moreover, the lack of positioning of the workpiece to be welded before spot welding may cause misalignment of the workpiece to be welded, thereby affecting the welding quality of the workpiece to be welded. Summary of the Invention

[0005] Based on this, in view of the problems that the current spot welder cannot detect false welding during welding and has poor welding quality, it is necessary to provide an environment-friendly welding device for cabinet processing.

[0006] The above object is achieved by the following technical solutions: An environment-friendly welding device for cabinet processing, comprising: A machine base, on which a workbench is provided. A bearing plate is provided on the workbench. The bearing plate can adsorb the plate to be welded. A lower electrode is vertically provided on the workbench. The upper end of the lower electrode can contact the lower end face of the plate to be welded; An upper electrode, which is coaxially arranged with the lower electrode on the machine base. The upper electrode can move vertically to contact the upper end face of the plate to be welded; A protective cover, 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 axially slide relative to the upper electrode. A first elastic member is connected between the upper end of the protective cover and the upper electrode. Initially, the lower end face of the 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 stored energy of the elastic member pushes the protective cover to press against the upper end face of the plate to be welded; During the process that the upper electrode contacts the upper end face of the to-be-welded plate along the vertical direction, the lower end of the protective cover first contacts the upper end face of the to-be-welded plate, and the first elastic member is stretched to apply a force for pressing the protective cover against the to-be-welded plate; A movable plate, the movable plate is slidably and sealingly arranged in the protective cover, a first telescopic cylinder is arranged between the movable plate and the upper electrode, and the first telescopic cylinder can push or pull the movable plate to move axially along the protective cover; The first telescopic cylinder is configured to push the movable plate towards the to-be-welded plate to discharge the gas between the movable plate and the to-be-welded plate when the protective cover contacts the to-be-welded plate, and pull the movable plate away from the to-be-welded plate before the upper electrode detaches from the to-be-welded plate to form a negative pressure between the movable plate and the to-be-welded plate.

[0007] Furthermore, an induction component is arranged on the protective cover, the induction component can sense the thickness of the to-be-welded plate to adjust the distance that the first telescopic cylinder drives the movable plate to move axially, and the distance that the movable plate moves axially is positively correlated with the thickness of the to-be-welded plate.

[0008] Furthermore, the induction component 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 rodless cavity of the second telescopic cylinder is communicated with the rodless cavity of the first telescopic cylinder through the hydraulic oil pipe; The second telescopic cylinder is configured that initially, the telescopic end is flush with the lower end of the protective cover, and when the lower end of the protective cover contacts the to-be-welded plate, the telescopic end stops extending.

[0009] Furthermore, a one-way exhaust valve is arranged on the movable plate, and the one-way exhaust valve allows the gas between the movable plate and the to-be-welded plate to be discharged.

[0010] Furthermore, a sealing rubber sleeve is fixedly connected to the lower end face of the protective cover.

[0011] Furthermore, a second elastic member is sleeved on the outer periphery of the lower electrode, one end of the second elastic member is fixedly connected to the workbench, the other end of the second elastic member is fixedly connected to the bearing plate, and the bearing plate and the lower electrode can slide axially relative to each other.

[0012] Furthermore, a third elastic member is connected between the lower end of the movable plate and the position of the upper electrode close to the lower end.

[0013] Furthermore, a telescopic cylinder is fixedly arranged on the machine base, the telescopic cylinder is vertically arranged, and the telescopic end of the telescopic cylinder is connected to the upper electrode.

[0014] Furthermore, a plurality of adsorption holes are formed in the bearing plate, and an air extraction pump is connected to the outside of the bearing plate. The plurality of adsorption holes are all communicated with the air extraction pump.

[0015] Furthermore, a control box is arranged on the machine base.

[0016] The beneficial effects of the present invention are as follows: By arranging a protective cover on the upper electrode in the present invention, when the upper electrode approaches the plate to be welded, the protective cover can press against the plate to be welded to position the plate to be welded. And an activity plate capable of axially sliding is arranged in the protective cover, so that a negative pressure is formed between the activity plate and the plate to be welded, and thus the protective cover can adsorb the plate to be welded. When the upper electrode moves away from the plate to be welded, it can adsorb the plate to be welded to detect whether there is a virtual welding situation. Moreover, the protective cover can also play a protective role, preventing the splashing of sparks and avoiding affecting the roughness of other areas of the plate to be welded.

[0017] The present invention arranges an induction component to sense the thickness of the plate to be welded and then adaptively adjust the adsorption force of the protective cover on the plate to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an environment-friendly welding device for cabinet processing provided by an embodiment of the present invention; Figure 2 For Figure 1 a left view of the environment-friendly welding device for cabinet processing provided by an embodiment of Figure 3 For Figure 2 a sectional view taken along A-A of the environment-friendly welding device for cabinet processing provided by an embodiment of Figure 4 For Figure 2 a sectional view taken along A-A of the environment-friendly welding device for cabinet processing provided by an embodiment of Figure 5 For Figure 3 a partial enlarged view of part X of the environment-friendly welding device for cabinet processing provided by an embodiment of Figure 6 For Figure 4 a partial enlarged view of part Y of the environment-friendly welding device for cabinet processing provided by an embodiment of

[0019] Wherein: 100, machine base; 110, workbench; 120, bearing plate; 130, adsorption hole; 140, induction end; 150, upper electrode; 160, lower electrode; 170, telescopic cylinder; 180, air extraction pump; 190, control box; 200, protective cover; 210, sealing rubber sleeve; 220, movable disk; 230, one-way air release valve; 240, first telescopic cylinder; 250, rodless cavity; 260, first elastic member; 270, second telescopic cylinder; 280, rod cavity; 300, second elastic member; 310, third elastic member. Specific implementation manner

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, 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 used to limit the present invention.

[0021] The serial numbers assigned to the components in this article itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly specified and defined, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0023] The following refers to Figures 1-6 to describe an environment-friendly welding device for cabinet processing provided by the present invention.

[0024] An environment-friendly welding device for cabinet processing, suitable for welding plates, includes a machine base 100. A workbench 110 is arranged on the machine base 100, and a bearing plate 120 is arranged on the workbench 110. The bearing plate 120 is used to place the plates to be welded. The bearing plate 120 can adsorb the plates to be welded. There are two plates to be welded, and the two plates to be welded are superposed on each other. The bearing plate 120 adsorbs the lower end face of the lower plate to be welded. A lower electrode 160 is also arranged on the workbench 110. The top end of the lower electrode 160 can contact the lower end face of the lower plate to be welded. And an upper electrode 150 coaxial with the lower electrode 160 is arranged on the machine base 100, and the upper electrode 150 can move in the vertical direction so as to contact the upper end face of the upper plate to be welded. When the upper electrode 150 and the lower electrode 160 respectively contact the two plates to be welded, current can be passed into the two plates to be welded. The current makes the contact positions of the two plates to be welded melt instantaneously, thereby welding the two plates to be welded together. In the prior art during the welding process, the two plates to be welded are not positioned, only the lower plate to be welded is fixed. So it will cause the two plates to be welded to be misaligned during welding, resulting in the welding positions of the two plates to be welded not corresponding, leading to unqualified welding of the two plates to be welded, and further affecting the welding efficiency. And there may be a phenomenon of false welding during welding. Therefore, it is necessary to detect in time whether there is a false welding phenomenon to avoid affecting the welding quality. There is no device for detecting false welding in the prior art, resulting in uncertain welding quality and affecting the connection strength of the plates to be welded.

[0025] Therefore, to address the above problems, a protective cover 200 is slidably arranged 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. During the process of the upper electrode 150 moving towards 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 gives the protective cover 200 a force 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 to say, the protective cover 200 positions the two plates to be welded. Subsequently, when the upper electrode 150 contacts the upper plate to be welded, the two plates to be welded can be welded together without misalignment.

[0026] At the same time, a movable disk 220 is slidably and sealingly arranged in the protective cover 200. A first telescopic cylinder 240 is arranged between the upper end face of the movable disk 220 and the upper electrode 150. The telescopic movement of the first telescopic cylinder 240 can push or pull the movable disk 220 to move axially in the protective cover 200, and the first telescopic cylinder 240 is configured as follows: During the movement of the upper electrode 150 towards the upper end surface of the plate to be welded, and when the lower end of the protective cover 200 touches the upper end surface of the plate to be welded, the first telescopic cylinder 240 starts to extend, thereby pushing the movable plate 220 to move in the protective cover 200 towards the plate to be welded. At this time, the gas between the movable plate 220 and the plate to be welded is discharged; before the upper electrode 150 contacts the upper end of the plate to be welded to complete the welding and needs to be separated from the plate to be welded, the second telescopic cylinder 270 shortens to pull the movable plate 220 to move away from the plate to be welded, so that a negative pressure is formed between the movable plate 220 and the plate to be welded, and the protective cover 200 can adsorb 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 away from the plate to be welded. Since the protective cover 200 adsorbs the upper plate to be welded and the carrier plate 120 adsorbs the lower plate to be welded, when the upper electrode 150 moves, it can pull the protective cover 200, and the protective cover 200 applies a pulling force to the upper plate to be welded to detect whether there is a virtual welding phenomenon between the two plates to be welded.

[0027] 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 separates from the upper plate to be welded, it means that the connection strength of the two plates to be welded is high and there is no virtual welding situation. 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 separate, it means that the connection strength of the two plates to be welded is insufficient, indicating that there is a virtual welding situation.

[0028] It should be noted that the protective cover 200 in the present invention can also play a protective role. During the welding process of the two plates to be welded, sparks will splash. The splashes will not only burn the skin of the staff, but also have a certain impact on the surface roughness of the plates to be welded. The setting of the protective cover 200 can prevent the sparks from splashing and avoid affecting the roughness of other areas of the plates to be welded at the same time.

[0029] To facilitate the first elastic member 260 to apply a pushing force to the upper plate to be welded by the protective cover 200 when stretched, in this embodiment, one end of the first elastic member 260 is directly connected to the upper end surface of the movable plate 220, and the other end of the first elastic member 260 is connected to the upper end of the protective cover 200. The movable plate 220 is coaxially and slidably connected with the upper electrode 150. A limiting protrusion is provided on the upper electrode 150, and the limiting protrusion limits the maximum distance of the relative movement of the movable plate 220 with respect to the upper electrode 150. When the upper electrode 150 moves downward, it can push the movable plate 220 to move downward through the limiting protrusion to stretch the first elastic member 260.

[0030] Specifically, in order to discharge the gas between the movable plate 220 and the to-be-welded plate during the process of the movable plate 220 approaching the to-be-welded plate, and to form a negative pressure between the movable plate 220 and the to-be-welded plate when the movable plate 220 moves away from the to-be-welded plate, a one-way air release valve 230 is provided on the movable plate 220. The one-way air release valve 230 only allows the gas to be discharged from between the movable plate 220 and the to-be-welded plate, and does not allow the gas to enter between the movable plate 220 and the to-be-welded plate. Thus, a negative pressure can be formed between the movable plate 220 and the to-be-welded plate, so that the upper electrode 150 can adsorb the upper to-be-welded plate through the protective cover 200 during the upward movement process to detect whether there is a false soldering phenomenon. If there is a false soldering situation, the two to-be-welded plates need to be re-welded. After welding is completed, detection is carried out again until there is no false soldering situation.

[0031] In a further embodiment, an induction component is provided on the protective cover 200. The induction component can sense the thickness of the to-be-welded plate and then adjust the distance that the first telescopic cylinder 240 pushes or pulls the movable plate 220 to axially move within the protective cover 200, and the axially moving distance of the movable plate 220 is positively correlated with the thickness of the to-be-welded plate. It can be understood that if the thickness of the to-be-welded plate is larger, then the welding strength between the two needs to be greater. When detecting whether there is a false soldering situation between the two, a greater force is required, and thus a greater adsorption force of the protective cover 200 on the upper to-be-welded plate is needed to prevent inaccurate detection.

[0032] Specifically, the induction component 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 communicated with 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 extends, the oil in the rod chamber 280 can be conveyed into the rodless chamber 250 in the first telescopic cylinder 240 through the hydraulic oil pipe, and then the telescopic end of the first telescopic cylinder 240 can be pushed to extend. And during the extension process of the telescopic end of the second telescopic cylinder 270, the thickness of the to-be-welded plate can be detected. An induction end 140 is provided on the bearing plate 120, and the two to-be-welded plates on the bearing plate 120 do not block the induction end 140. When the lower end of the protective cover 200 does not contact the to-be-welded plate, as Figure 5 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 to-be-welded plate, the telescopic end of the second telescopic cylinder 270 starts to extend. The second telescopic cylinder 270 drives the first telescopic cylinder 240 to extend synchronously. After the telescopic end of the second telescopic cylinder 270 abuts against the induction end 140 of the bearing plate 120, it stops. The specific state is as Figure 6As shown, the extended distance of the telescopic end of the second telescopic cylinder 270 at this time is positively correlated with the thickness of the plate to be welded.

[0033] It can be understood that the greater the thickness of the plate to be welded, the longer the distance the telescopic end of the second telescopic cylinder 270 needs to extend to contact the induction end 140; while the smaller the thickness of the plate to be welded, the shorter the distance the telescopic end of the second telescopic cylinder 270 needs to extend to contact the induction end 140. Since the first telescopic cylinder 240 and the second telescopic cylinder 270 extend synchronously, when the thickness of the plate to be welded is thicker, the first telescopic cylinder 240 drives the movable plate 220 to axially move a greater distance, thereby discharging more gas between the movable plate 220 and the plate to be welded, and forming a greater negative pressure between the movable plate 220 and the plate to be welded, thus 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 first telescopic cylinder 240 drives the movable plate 220 to axially move a smaller distance, thereby reducing the adsorption force of the protective cover 200 on the plate to be welded, but it does not affect the detection of virtual welding of the plate to be welded.

[0034] In a further embodiment, to improve the airtightness when the protective cover 200 adsorbs 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 lower end opening of the protective cover 200, and the sealing rubber sleeve 210 can increase the airtightness between the protective cover 200 and the plate to be welded.

[0035] It should be noted that as Figure 5 and Figure 6 shown, the cross-section of the sealing rubber sleeve 210 in this embodiment is an inverted T shape. The upper end of the inverted T-shaped sealing rubber sleeve 210 is a circular ring, and the circular ring is fixedly connected to the lower end of the protective cover 200. The lower end surface of the inverted T shape is also a circular ring. The outer diameter of the circular ring at the lower end surface is larger than the outer diameter of the circular ring at the upper end surface, and the inner diameter of the circular ring at the lower end surface is smaller than the inner diameter of the circular ring at the upper end surface, thereby increasing the contact area between the sealing rubber sleeve 210 and the plate to be welded and further improving the airtightness.

[0036] In a further embodiment, the bearing 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, avoiding the situation where the lower electrode 160 contacts the lower end of the plate to be welded unevenly when the lower electrode 160 is worn.

[0037] 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 carrier plate 120. When a to-be-welded plate to be welded is placed on the carrier plate 120, the second elastic member 300 is compressed to a certain extent. At this time, the lower electrode 160 does not contact the lower end surface of the to-be-welded plate. Only when the upper electrode 150 drives the protective cover 200 to move towards the to-be-welded plate and continuously squeezes the to-be-welded plate, the to-be-welded plate pushes the carrier plate 120 to move downward, and the second elastic member 300 at the lower end of the carrier plate 120 is further compressed until the upper end of the upper electrode 150 is in full contact with the lower end of the lower to-be-welded plate, the carrier plate 120 no longer continues to compress the second elastic member 300.

[0038] Through the setting of the above-mentioned second elastic member 300, it can be ensured that the upper end of the lower electrode 160 can be fully in contact with the to-be-welded plate even when it is worn. If a carrier plate 120 with a fixed position is provided instead of a carrier plate 120 that can move vertically, when the lower electrode 160 is worn, the to-be-welded plate cannot be fully in contact with the lower electrode 160, thus affecting the welding quality.

[0039] Specifically, to realize the function that the upper electrode 150 can move in the vertical direction, a telescopic cylinder 170 is provided on the machine base 100. The telescopic cylinder 170 is vertically arranged. The fixed end of the telescopic cylinder 170 is fixedly connected to the machine base 100, and the telescopic end of the telescopic cylinder 170 is connected to the upper electrode 150. The telescopic movement of the telescopic cylinder 170 can drive the upper electrode 150 to approach or move away from the lower electrode 160.

[0040] Specifically, a plurality of suction holes 130 are formed on the upper end surface of the carrier plate 120 in this embodiment, and an air extraction pump 180 is fixedly connected to the outside of the carrier plate 120. The air extraction pump 180 is communicated with the plurality of suction holes 130. When the air extraction pump 180 works, it can make the plurality of suction holes 130 suck air, so as to adsorb the lower to-be-welded plate placed on the carrier plate 120 on the carrier plate 120 to play a positioning function.

[0041] Specifically, a third elastic member 310 is further provided between the lower end surface of the movable disc 220 and the upper electrode 150. One end of the third elastic member 310 is connected to the lower end surface of the movable disc 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 and pushes the movable disc 220 to move close to the to-be-welded plate, the third elastic member 310 can be compressed. When the first telescopic cylinder 240 shortens, the third elastic member 310 can give the movable disc 220 a resetting force, thereby reducing the load when the second telescopic cylinder 270 shortens.

[0042] Specifically, a control box 190 is provided on the machine base 100, and the control box 190 can adjust the current magnitudes of the upper electrode 150 and the lower electrode 160.

[0043] It should be noted that the first elastic member 260 in this embodiment is a tension spring, and the second elastic member 300 and the third elastic member 310 are both compression springs.

[0044] Combined with the above embodiments, the specific working process of an environment-friendly welding device for cabinet processing provided by the present invention is described as follows: Installation and positioning: Stack the two to-be-welded plates to be welded on the bearing plate 120 of the workbench 110. When the two to-be-welded plates are placed on the bearing plate 120, the bearing plate 120 can compress the second elastic member 300 under the action of gravity, causing the upper end of the lower electrode 160 to move towards the lower end face of the lower to-be-welded plate, but not in contact. At this time, start the air extraction pump 180, and the air extraction pump 180 extracts air so that the plurality of adsorption holes 130 on the bearing plate 120 can adsorb the lower end face of the lower to-be-welded plate, thereby positioning the lower to-be-welded plate on the bearing plate 120.

[0045] Secondary positioning: Start the telescopic cylinder 170. The telescopic end of the telescopic cylinder 170 extends to drive the upper electrode 150 and the protective cover 200 to move towards the upper end face of the upper to-be-welded plate. The lower end of the protective cover 200 first contacts the upper end face of the upper to-be-welded plate. The telescopic end of the telescopic cylinder 170 continues to extend, causing the upper electrode 150 to continue to move downward. Since the lower end of the protective cover 200 contacts the upper to-be-welded plate, the protective cover 200 pushes the two to-be-welded plates to move downward, thereby compressing the second elastic member 300 at the bottom of the bearing plate 120. When the upper end of the lower electrode 160 completely abuts against the lower end face of the lower to-be-welded plate, the bearing plate 120 is restricted from moving 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 to-be-welded plate, thereby positioning the two to-be-welded plates.

[0046] Exhaust: The second telescopic cylinder 270 is started. The telescopic end of the second telescopic cylinder 270 extends, and the hydraulic oil in the rod chamber 280 of the second telescopic cylinder 270 enters the rodless chamber 250 of the first telescopic cylinder 240 through a hydraulic oil pipe (not shown in the figure), thereby driving the telescopic end of the first telescopic cylinder 240 to extend synchronously.

[0047] If the thicknesses of the two plates to be welded are relatively thick, when the telescopic end of the second telescopic cylinder 270 abuts against the sensing end 140 on the bearing plate 120, it needs to extend a relatively long distance. At the same time, the telescopic end of the first telescopic cylinder 240 drives the movable plate 220 to move a relatively long distance in the protective cover 200 in the direction close to the upper end face of the upper plate to be welded. The one-way air release valve 230 on the movable plate 220 can discharge the gas between the movable plate 220 and the upper plate to be welded. When the telescopic end of the second telescopic cylinder 270 abuts against the sensing end 140 on the bearing plate 120, it stops working. At this time, the first telescopic cylinder 240 also stops working simultaneously.

[0048] If the thicknesses of the two plates to be welded are relatively thin, when the telescopic end of the second telescopic cylinder 270 abuts against the sensing end 140 on the bearing plate 120, it needs to extend a relatively short distance. At the same time, the telescopic end of the first telescopic cylinder 240 drives the movable plate 220 to move a relatively short distance in the protective cover 200 in the direction close to the upper end face of the upper plate to be welded. The one-way air release valve 230 on the movable plate 220 can discharge the gas between the movable plate 220 and the upper plate to be welded. When the telescopic end of the second telescopic cylinder 270 abuts against the sensing end 140 on the bearing plate 120, it stops working. At this time, the first telescopic cylinder 240 also stops working simultaneously.

[0049] Welding: The upper electrode 150 continues to move in the direction close to the upper end face of the upper plate to be welded. When the upper electrode 150 contacts the upper end face of the upper plate to be welded, current quickly passes through to generate high temperature, and the contact part melts and is welded together.

[0050] Detection of false welding: After welding is completed, the telescopic end of the second telescopic cylinder 270 starts to shorten. The liquid in the rodless cavity 250 of the first telescopic cylinder 240 flows back into the rod cavity 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 plate 220 to move away from the upper plate to be welded. At the same time, the third elastic member 310 below the movable plate 220 assists in pushing the movable plate 220 to move to reduce the load on the second telescopic cylinder 270. After the movable plate 220 moves away from the upper plate to be welded, the air pressure between the movable plate 220 and the upper plate to be welded decreases and then enters a negative pressure state. If the thickness of the plate to be welded is relatively thick, the movable plate 220 moves a longer distance, making the adsorption force of the protective cover 200 on the upper end face of the upper plate to be welded greater; if the thickness of the plate to be welded is relatively thin, the movable plate 220 moves a shorter distance, thereby reducing the adsorption force of the protective cover 200 on the upper end face of the upper plate to be welded. The telescopic end of the telescopic cylinder 170 shortens to pull the upper electrode 150 upward. The upward movement of the upper electrode 150 compresses the third elastic member 310. After the third elastic member 310 is compressed to the limit, it drives the protective cover 200 to move through the negative pressure action of the movable plate 220. Under the pulling of the upper electrode 150, if the protective cover 200 detaches from the upper plate to be welded, it indicates that the connection strength of the two plates to be welded is high and there is no phenomenon of false welding. If the protective cover 200 drives the upper plate to be welded to detach from the lower plate to be welded, it indicates that there is a false welding phenomenon and welding needs to be redone.

[0051] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as within the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An environment-friendly welding device for cabinet processing, characterized in that, Comprising: A machine base, on which a workbench is provided, on which a bearing plate is provided, the bearing plate can adsorb the plate to be welded, a lower electrode is vertically arranged on the workbench, and the upper end of the lower electrode can contact the lower end face of the plate to be welded; An upper electrode, which is coaxially arranged with the lower electrode on the machine base, and the upper electrode can move vertically to contact the upper end face of the plate to be welded; A protective cover, 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 axially slide relative to the upper electrode, a first elastic member is connected between the upper end of the protective cover and the upper electrode, initially the lower end face of the 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 slidably and sealingly 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 towards 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 pull the movable disk away from the plate to be welded to form a negative pressure between the movable disk and the plate to be welded before the upper electrode disengages from the plate to be welded.

2. The environmentally friendly welding device for cabinet processing according to claim 1, wherein An induction component is arranged on the protective cover, and the induction component can sense the thickness of the plate to be welded to adjust the distance that the first telescopic cylinder drives the movable disk to move axially, and the distance that the movable disk moves axially 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 induction component 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 rodless cavity of the second telescopic cylinder is communicated with the rodless cavity of the first telescopic cylinder through the hydraulic oil pipe; The second telescopic cylinder is configured to have its telescopic end flush with the lower end of the protective cover initially, and when the lower end of the protective cover contacts the plate to be welded, the telescopic end stops extending.

4. The environmentally friendly welding device for cabinet processing according to claim 1, characterized in that, A one-way exhaust valve is arranged 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.

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

6. The environmentally friendly welding device for cabinet processing according to claim 1, wherein A second elastic member is sleeved on the outer periphery of the lower electrode, one end of the second elastic member is fixedly connected to the workbench, the other end of the second elastic member is fixedly connected to the bearing plate, and the bearing plate and the lower electrode can axially slide 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 near the lower end of the upper electrode.

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 vertically arranged, 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, A plurality of adsorption holes are formed in the bearing plate, an air extraction pump is connected to the outside of the bearing plate, and the plurality of adsorption holes are all communicated with the air extraction pump.

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

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