A spot welder for the door shell of a refrigeration device and a method for manufacturing the door shell

Abstract

The present invention relates to a spot welder for the door shell of a refrigeration device and a method for manufacturing the door shell. The spot welder for the door shell of the refrigeration device includes a machine table, a horizontal precision positioning workbench, a servo motor, a longitudinal linear slide, a longitudinal propulsion cylinder, a first shaping cylinder, a second shaping cylinder, a first shaping block, a second shaping block, a first clamping cylinder, a second clamping cylinder, a first clamping block, a second clamping block, a first lower electrode, a second lower electrode, a welding pressure cylinder, and an upper electrode; a working platform is arranged on the machine table, the first lower electrode and the second lower electrode are arranged on the working platform, and the positions of the first lower electrode and the second lower electrode in the horizontal direction correspond to each other. When using the spot welder for the door shell of the refrigeration device to process the door shell of an intelligent device, argon arc welding is not required, which is safer and more efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a spot welder for the door shell of a refrigeration equipment and a method for manufacturing the door shell. Background Art

[0002] At present, some door shells of refrigeration equipment are processed from sheet metal parts; the door shell generally includes a door main board and a door handle; in the traditional manufacturing process of the door shell, the corner joints of the door main board are welded by argon arc welding and then polished, and the door handle and the door main board are also welded together by argon arc welding. However, argon arc welding has relatively high requirements for the technical level of workers, and there are certain construction risks in argon arc welding; in addition, the thickness of the door shell is generally small, often only 0.5 mm, so the requirements for argon arc welding are even higher. Improper operation or improper setting of the argon arc welding equipment may not only cause the sheet metal parts to burn through or turn black, but also may cause false welding, which will affect the appearance or firmness of the door shell, thus affecting the quality of the refrigeration equipment. Summary of the Invention

[0003] Based on the above problems, the purpose of the present invention is to provide a spot welder for the door shell of a refrigeration equipment and a method for manufacturing the door shell. Using this spot welder for manufacturing the door shell, argon arc welding is not required, which can not only improve the operation safety, but also improve the quality of the door shell.

[0004] The technical solution provided by the present application is a spot welder for the door shell of a refrigeration equipment, including a machine table 1, a horizontal precision positioning workbench 2, a servo motor 3, a longitudinal linear slide 4, a longitudinal propulsion cylinder 5, a first shaping cylinder 6, a second shaping cylinder 7, a first shaping block 8, a second shaping block 9, a first clamping cylinder 10, a second clamping cylinder 11, a first clamping block 12, a second clamping block 13, a first lower electrode 14, a second lower electrode 15, a welding pressure cylinder 16, and an upper electrode 17;

[0005] A working platform 101 is arranged on the machine table 1, the first lower electrode 14 and the second lower electrode 15 are arranged on the working platform 101, and the positions of the first lower electrode 14 and the second lower electrode 15 correspond to each other in the horizontal direction;

[0006] The longitudinal linear slide 4 is arranged on the horizontal precision positioning table 2, the welding pressure cylinder 16 is installed on the longitudinal linear slide 4, and the longitudinal propulsion cylinder 5 is installed on one side of the longitudinal linear slide and can push the welding pressure cylinder 16 to move along the longitudinal linear slide 4; an upper electrode 17 is arranged below the moving block of the welding pressure cylinder 16; a first shaping cylinder 6 and a second shaping cylinder 7 are respectively and fixedly arranged on both sides of the welding pressure cylinder 16; a first shaping block 8 is installed on the moving block of the first shaping cylinder 6; a second shaping block 9 is installed on the moving block of the second shaping cylinder 7; a servo motor 3 is arranged on one side of the horizontal precision positioning table 2; the servo motor 3 can push the longitudinal linear slide 4 to move along the horizontal precision positioning table 2; the first shaping block 8 can move downward under the push of the first shaping cylinder 6 until it abuts against the first lower electrode; the second shaping block 9 can move downward under the push of the second shaping cylinder 7 until it abuts against the second lower electrode; the first clamping cylinder 10 and the second clamping cylinder 11 extend outside the workbench surface 101, the first clamping cylinder 10 corresponds to the first lower electrode 14 in the longitudinal direction, and the second clamping cylinder 11 corresponds to the second lower electrode 15 in the longitudinal direction; a first clamping block 12 is arranged on the moving block of the first clamping cylinder 10; a second clamping block 13 is arranged on the moving block of the second clamping cylinder 11.

[0007] Optionally, it further includes an intermediate frequency welder 18, and the intermediate frequency welder 18 is an intermediate frequency inverter DC resistance welder with a control frequency of 1 kHz.

[0008] Optionally, it further includes an electrical control system, and the electrical control system uses a PLC to control the movement of the servo motor 3, the longitudinal propulsion cylinder 5, the first shaping cylinder 6, the second shaping cylinder 7, the first clamping cylinder 10 and the second clamping cylinder 11.

[0009] Optionally, mechanism threaded holes are arranged on the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7, and the first shaping block 8 and the second shaping block 9 are respectively installed on the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 through the mechanism threaded holes;

[0010] Or mechanism threaded holes are arranged on the moving blocks of the first clamping cylinder 10 and the second clamping cylinder 11, and the first clamping block 12 and the second clamping block 13 are respectively installed on the moving blocks of the first clamping cylinder 10 and the second clamping cylinder 11 through the mechanism threaded holes.

[0011] The embodiment of the present application also provides a manufacturing method for the door shell of a refrigeration device, including the following steps:

[0012] Hem the door shell main board sheet metal part to form the door shell main board;

[0013] Place the door corner liner corresponding to the shape of the corner part of the door shell main board above the first lower electrode and / or the second lower electrode of the refrigerator door shell spot welder as described above; then place the corner part of the door shell main board above the door corner liner;

[0014] Start the refrigerator door shell spot welder, and the refrigerator door shell spot welder welds the door corner liner to the corner part of the door shell main board.

[0015] Optionally, the refrigerator door shell spot welder welding the door corner liner to the corner part of the door shell main board includes the following steps:

[0016] Control the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 to move downward to shape the corner part;

[0017] Control the first clamping cylinder 10 and the second clamping cylinder 11 to move towards the first lower electrode and the second lower electrode to clamp the door shell main board;

[0018] Control the servo motor 3 and the longitudinal propulsion cylinder 5 to work, and move the upper electrode 17 above the first lower electrode and / or the second lower electrode;

[0019] Control the welding pressure cylinder 16 to move downward until the upper electrode contacts the corner part of the door shell main board for spot welding.

[0020] Optionally, it further includes:

[0021] Hem the door handle sheet metal part to form the door handle;

[0022] Fix and install the door handle on the door shell main board to obtain the door shell.

[0023] Optionally, the fixing and installing the door handle on the door shell main board includes the following steps:

[0024] Perform spot welding on one side where the door handle contacts the door shell main board;

[0025] Use rivets to rivet and fix the second border part and the fourth border part where the door handle contacts the door shell main board.

[0026] Optionally, it further includes the step:

[0027] Machine to obtain the door corner liner.

[0028] Optionally, the corner part of the door shell main board is formed by hemming and piecing together the door shell sheet metal parts.

[0029] A spot welder for the door shell of a refrigeration device provided by an embodiment of the present application includes an upper electrode, a lower electrode, a first shaping block, a second shaping block, a first pressing block, and a second pressing block. It can shape and press the sheet metal parts to be welded placed on the lower electrode, and then use the upper and lower electrodes to perform spot welding on the sheet metal parts to be welded. This spot welder for the door shell of a refrigeration device is particularly suitable for performing spot welding on the corners of the main board of the door shell of a refrigeration device, so that argon arc welding is not required when manufacturing the door shell of a refrigeration device, which is beneficial to improving the processing efficiency and operation safety of the door shell of a refrigeration device.

[0030] An embodiment of the present application also provides a method for manufacturing a door shell of a refrigeration device. By using the above-mentioned spot welder for the door shell of a refrigeration device to perform spot welding on the corners of the main board of the door shell, argon arc welding is not required when manufacturing the door shell of a refrigeration device, which is beneficial to improving the processing efficiency and operation safety of the door shell of a refrigeration device. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of a spot welder for the door shell of a refrigeration device provided by an embodiment of the present invention;

[0032] Figure 2 is an enlarged partial structural diagram of the spot welder for the door shell of a refrigeration device provided by an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of a door angle lining provided by an embodiment of the present application;

[0034] Figure 4 is a schematic structural diagram of a door shell main body sheet metal part and a door handle sheet metal part provided by an embodiment of the present application;

[0035] Figure 5 is for Figure 4 the structural schematic diagram of the door shell main body formed after folding the door shell main body sheet metal part;

[0036] Figure 6 is for Figure 5 the enlarged structural schematic diagram of the corner of the door shell main body;

[0037] Figure 7 is for Figure 4 the door handle formed after folding the door handle sheet metal part. Detailed Embodiments

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0039] In the following description, terms indicating orientation or positional relationship such as "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing embodiments and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0040] Currently, for the door shell of a refrigeration device, generally, a processed sheet metal part is first folded to form a preliminary door shell shape, and then argon arc welding is used to weld at the folded edges where fixed connection is required. After argon arc welding, the welded joints need to be polished. This not only involves many processes and high processing costs, but also argon arc welding is prone to false welding, resulting in poor product quality, and is also prone to over-welding, affecting quality and aesthetics.

[0041] Based on this, the embodiment of the present application provides a spot welder for the door shell of a refrigeration device, as Figure 1-2 shown. The spot welder for the door shell includes a machine table 1, a horizontal precision positioning workbench 2, a servo motor 3, a longitudinal linear slide 4, a longitudinal propulsion cylinder 5, a first shaping cylinder 6, a second shaping cylinder 7, a first shaping block 8, a second shaping block 9, a first clamping cylinder 10, a second clamping cylinder 11, a first clamping block 12, a second clamping block 13, a first lower electrode 14, a second lower electrode 15, a welding pressure cylinder 16, and an upper electrode 17;

[0042] The machine table 1 is the base support of the entire spot welder for the door shell, and other components are all installed and arranged on it, with their relative positions as Figure 1 ; specifically, a working platform 101 is provided on the machine table 1, and the first lower electrode 14 and the second lower electrode 15 are arranged on the working platform 101, and their positions in the horizontal direction correspond to each other; place the sheet metal part to be welded on the lower electrode, and move the upper electrode 17 to contact the sheet metal part to be welded, then the sheet metal part to be welded can be spot welded using the upper and lower electrodes.

[0043] The longitudinal linear slide 4 is provided on the horizontal precision positioning workbench 2, and the welding pressure cylinder 16 is installed on the longitudinal linear slide 4, as Figure 2As shown in the figure, the welding pressure cylinder 16 is installed at the front end of the longitudinal linear slide 4, and the longitudinal propulsion cylinder 5 is installed on one side of the longitudinal linear slide. It can push the welding pressure cylinder 16 to move along the longitudinal linear slide 4, realizing the control of the longitudinal position of the welding pressure cylinder 16; an upper electrode 17 is arranged below the moving block of the welding pressure cylinder 16; the first shaping cylinder 6 and the second shaping cylinder 7 are respectively and fixedly arranged on both sides of the welding pressure cylinder 16; when the welding pressure cylinder 16 moves, the first shaping cylinder 6 and the second shaping cylinder 7 move accordingly. That is, the longitudinal propulsion cylinder 5 can control the longitudinal positions of the first shaping cylinder 6 and the second shaping cylinder 7. The first shaping block 8 is installed on the moving block of the first shaping cylinder 6; the second shaping block 9 is installed on the moving block of the second shaping cylinder 7; the first shaping block 8 and the second shaping block 9 can move respectively with the longitudinal movement of the first shaping cylinder 6 and the second shaping cylinder 7. And the first shaping block 8 can move downward under the push of the first shaping cylinder 6 until it abuts against the first lower electrode 14; the second shaping block 9 can move downward under the push of the second shaping cylinder 7 until it abuts against the second lower electrode 15, thereby realizing the shaping of the sheet metal parts to be welded placed on the lower electrode.

[0044] Furthermore, a servo motor 3 is arranged on one side of the transverse precision positioning workbench 2; the servo motor 3 can push the longitudinal linear slide 4 to move along the transverse precision positioning workbench 2; that is, the servo motor 3 can control the transverse position movement of the longitudinal linear slide 4, and further can realize the control of the transverse positions of the welding pressure cylinder 16, the first shaping cylinder 6 and the second shaping cylinder 7.

[0045] Furthermore, as Figure 1 and 2 shown in the figure, the first clamping cylinder 10 and the second clamping cylinder 11 extend outside the workbench surface 101. The position of the first clamping cylinder 10 corresponds to that of the first lower electrode 14 longitudinally, and the position of the second clamping cylinder 11 corresponds to that of the second lower electrode 15 longitudinally; the first clamping block 12 is arranged on the moving block of the first clamping cylinder 10; the second clamping block 13 is arranged on the moving block of the second clamping cylinder 11; by controlling the first clamping cylinder 10 and the second clamping cylinder 11, the sheet metal parts to be welded placed on the first lower electrode 14 and the second lower electrode 15 can be fixed. After the sheet metal parts to be welded are clamped and fixed, spot welding is carried out using the upper and lower electrodes.

[0046] The above-mentioned refrigerator door shell spot welder is a tooling device that can automatically shape and continuously spot-weld. The welding pressure cylinder 16 is vertically installed on the moving platform of the longitudinal linear slide 4. Through the action of the longitudinal propulsion cylinder 5, the welding pressure cylinder 16 can move back and forth on the longitudinal linear slide 4.

[0047] In one embodiment, the upper electrode 17 is made of a copper block and is square. It is installed on the moving block of the welding pressure cylinder 16. By controlling the welding pressure cylinder 16, two actions of pressurized descent and release ascent are completed, so as to achieve the purpose of completing pressurized welding and release for material change.

[0048] Specifically, the longitudinal propulsion cylinder 5 is a linear motion cylinder with adjustable stroke. By adjusting the stroke, the purpose of controlling the longitudinal movement distance of the welding pressure cylinder 16 can be achieved, and further the longitudinal position of the upper electrode 17 can be controlled.

[0049] The servo motor 3 is installed at one end of the horizontal precision positioning workbench 2 and is connected to the precision screw. By controlling the servo motor 3 to drive the precision screw to rotate, the purpose of horizontally positioning and moving the longitudinal linear slide 4 can be achieved, and further the horizontal position of the upper electrode 17 can be controlled.

[0050] Figure 2 In it, the first lower electrode 14 and the second lower electrode 15 are fixedly installed on the machine table 1 in a symmetrical manner. In one embodiment, an insulating board can be used to insulate the machine table 1 to prevent the electricity of the electrode from being conducted to the machine table and causing an electric shock risk. In addition, the first lower electrode 14 and the second lower electrode 15 can be processed from copper blocks according to the side styles of the corner parts to be welded on the door shell main board, such as Figure 2 the first lower electrode 14 and the second lower electrode 15 shown, Figure 3 the door corner lining board shown and Figure 6 the corner shape shown are similar; during spot welding, first place the door corner lining board on the first lower electrode 14 or the second lower electrode 15, and then place Figure 5 the corner of the door panel main body formed after hemming shown on the first lower electrode 14 or the second lower electrode 15 as well, that is, the door corner lining board is located between the first lower electrode 14 or the second lower electrode 15 and the corner of the door panel main body; then control the servo motor 3 and the longitudinal propulsion cylinder 5 to move the welding pressure cylinder 16 above the first lower electrode 14 or the second lower electrode 15; finally, by controlling the welding pressure cylinder 16, two actions of pressurized descent and release ascent of the upper electrode are completed, so as to realize the spot welding connection of the door corner lining board and the corner part of the door shell main board. The first lower electrode 14 and the second lower electrode 15 can not only be used as the lower electrodes during welding, but also as the molds during shaping and clamping fixation; specifically, the first lower electrode 14 and the second lower electrode 15 respectively abut against the first shaping block 8 and the second shaping block 9 to realize the shaping of the corner part of the door shell main board; the first lower electrode 14 and the second lower electrode 15 respectively abut against the first clamping block 12 and the second clamping block 13 to realize the clamping fixation of the door shell main board. After clamping fixation, it is convenient to carry out spot welding, ensuring the accuracy of the spot welding position and the reliability of the spot welding.

[0051] Specifically, the first shaping cylinder 6 and the second shaping cylinder 7 are linear cylinders with built-in guide rods, having a moving block at the front end and pre-set machine-threaded holes, and other components can be installed through bolts. The first shaping block 8 and the second shaping block 9 are steel squares, which are respectively installed on the moving blocks at the front ends of the first shaping cylinder 6 and the second shaping cylinder 7. The lower planes of the first shaping block 8 and the second shaping block 9 are smooth planes processed by machining, and through the vertical movements of the first shaping cylinder 6 and the second shaping cylinder 7, the purpose of leveling the side seam at the corner of the door shell main board pre-set on the first lower electrode 14 and the second lower electrode 15 is achieved.

[0052] The first clamping cylinder 10 and the second clamping cylinder 11 are linear cylinders with built-in guide rods. They have a moving block at the front end and pre-set machine-threaded holes, and other components can be installed through bolts. The first clamping cylinder 10 and the second clamping cylinder 11 are longitudinally arranged, installed on the machine table 1 and extending to the outside of the workbench surface 101. The first clamping block 12 and the second clamping block 13 are steel special-shaped blocks, and their shapes can be made according to the style of the front of the corner of the door shell main board (such as 5, Figure 6 as viewed from inside the paper outwards).

[0053] The first clamping block 12 and the second clamping block 13 are respectively installed on the moving blocks at the front ends of the first clamping cylinder 10 and the second clamping cylinder 11. Through the longitudinal movements of the first clamping cylinder 10 and the second clamping cylinder 11, the purpose of clamping and fixing the door shell main board is achieved, and at the same time, it has the function of calibrating and adjusting the relevant bending angles on the front of the corner of the door shell main board.

[0054] Further, in an embodiment, the upper and lower electrodes are controlled by the intermediate frequency welder 18. The intermediate frequency welder 18 is an intermediate frequency inverter DC resistance welder, which provides energy support for welding. The control frequency is 1 kHz, the current control is fast and accurate, greatly reducing the spatter rate and effectively improving the welding spot quality. Its welding current is direct current, which can greatly reduce the influence of different inductive reactances of welding materials on the welding current. For the convenience of setting welding parameters, a display screen 181 can also be set on the intermediate frequency welder 18.

[0055] Further, in order to control various cylinders and motors, the above-mentioned refrigerator door shell spot welder further includes an electrical control system, as shown in icons 191 and 192. The electrical control system uses a PLC (programmable logic controller) to control the movement of the servo motor 3, the longitudinal propulsion cylinder 5, the first shaping cylinder 6, the second shaping cylinder 7, the first clamping cylinder 10 and the second clamping cylinder 11. The electrical control system 19 provides power and automatic operation support for the equipment. Through the PLC programming of the electrical control system, the horizontal and longitudinal multi-point automatic movement and positioning of the upper electrode and automatic power-on welding are realized, and then the coherent actions of clamping, shaping and multi-point welding are realized.

[0056] An embodiment of the present application provides a door shell of a refrigeration device. This door shell of the refrigeration device does not require argon arc welding process for processing and has the advantages of firm structure and convenient processing. Specifically, as Figure 3-7 shown, the refrigeration device includes a door shell main board A, a door corner lining board C, and a door handle B.

[0057] As Figure 5 shown, the door shell main board includes a main body 00. A first border part 01 is arranged on the first side of the main body 00, a second border part 02 is arranged on the second side of the main body 00, a third border part 03 is arranged on the third side of the main body 00, and a fourth border part 04 is arranged on the fourth side of the main body 00; there is a fold seam at the corner part of the second border part 02 close to the third border part 03; as Figure 6 shown, Figure 6 shows a structural schematic diagram of the corner part of the door shell main board, and there is a fold seam A2 on its upper side; there is also a fold seam (not shown in the figure) at the corner part of the fourth border part 04 close to the third border part 03; the door corner lining board is arranged inside the corner of the door shell and is spot welded to the folded edge forming the fold seam A2; by spot welding the folded edge of the fold seam A2 of the corner part through the door corner lining board, it can effectively prevent the fold seam from cracking when foaming the door shell; the door handle B is fixedly connected to the door shell main board A.

[0058] Furthermore, as Figure 4 and Figure 5 shown, the first border part 01, the second border part 02, the third border part 03, and the fourth border part 04 are all formed by folding the edges of the door shell main board sheet metal parts as Figure 4 shown; in one embodiment, the shape of the door shell main board sheet metal part is as Figure 4 shown, and it is folded along the dotted line to form the Figure 5 shown door shell main board. When folding the edges, the angles and arcs of the folding are controlled according to requirements, and this application does not make requirements for this, as long as it can be folded into the corresponding door shell main board.

[0059] Furthermore, as Figure 5 shown, a first through hole A11 is arranged at the overlapping folded edge of the first border part 01 and the second border part 02; the first border part 01 and the second border part 02 are fixed by using rivets through the first through hole A11; a second through hole A12 is arranged at the overlapping folded edge of the first border part 01 and the fourth border part 04; the first border part 01 and the fourth border part 04 are fixed by using rivets through the second through hole A12, thereby enhancing the strength of the door shell main board.

[0060] Furthermore, as Figure 5-6As shown, the third border part includes a first folded edge A131, a second folded edge A132, and a third folded edge A133; the plane where the first folded edge A131 is located forms an acute angle with the plane where the door shell main body 00 is located; the plane where the second folded edge A132 is located is parallel to the plane where the door shell main body 00 is located; the plane where the third folded edge A133 is located is perpendicular to the plane where the door shell main body 00 is located.

[0061] Further, in one embodiment, as Figure 5 shown, a third through hole A13 is provided at a position where the second border part 02 is close to the third folded edge A133; a fourth through hole A14 is provided at a position where the fourth border part 04 is close to the third folded edge A133.

[0062] On the basis of the above embodiment, further, as Figure 4 and Figure 7 shown, the door handle is formed by folding a door handle sheet metal part. As Figure 7 shown, the door handle has a first main body part B2 and a first folded edge part B1; the first main body part includes two mutually perpendicular folded edges, and the two mutually perpendicular folded edges are connected by an arc-shaped folded edge; the first folded edge part is connected to one of the mutually perpendicular folded edges, and the first folded edge part is provided with a fifth through hole B13 and a sixth through hole B14; when the door handle is installed on the door shell main board, the fifth through hole B13 coincides with the third through hole A13, and the sixth through hole B14 coincides with the fourth through hole A14. The door handle B is fixed to the door shell main board A by rivets through the fifth through hole B13 and the third through hole A13, and the sixth through hole B14 and the fourth through hole A14; in order to further ensure the connection strength between the door handle and the door shell main board, spot welding can be performed on the third folded edge A133 and the folded edge of the door handle connected to the first folded edge part B1, that is, spot welding is performed on the third folded edge A133 and one folded edge of the first main body part B2 connected to the first folded edge part B1; specifically, current spot welding can be performed.

[0063] The above refrigeration equipment door shell can be completed by folding, spot welding and riveting fixation, and has the advantage of stable structure. The stable structure makes it not easy to crack during foaming, which is beneficial to improving the performance and quality of the refrigeration equipment.

[0064] Further, the embodiment of the present application also provides a manufacturing method for a refrigeration equipment door shell, which is used to manufacture the above refrigeration equipment door shell and does not require argon arc welding. The manufacturing method includes the following steps:

[0065] Fold the door shell main board sheet metal part to form the door shell main board; specifically, according to Figure 4 shown, it is necessary to fold the door shell sheet metal part to form Figure 5The door shell main board shown, as long as the specific hemming method can achieve the shape of the door shell main board, the hemming angle, radian and number can be carried out as required, and the present application does not limit this.

[0066] Place the door corner liner corresponding to the shape of the corner part of the door shell main board above the first lower electrode and / or the second lower electrode of the refrigeration equipment door shell spot welder as described above; then place the corner part of the door shell main board above the door corner liner; that is, first place Figure 3 the door corner liner C shown above the first lower electrode 14 and / or the second lower electrode 15, and then place Figure 5 the corner part of the door shell main board shown (as Figure 6 shown) also above the first lower electrode 14 and / or the second lower electrode 15; the shape above the first lower electrode 14 and / or the second lower electrode 15 corresponds to the shape of the corner part of the door shell main board, and the corner part of the door shell main board can be placed above the first lower electrode 14 and / or the second lower electrode 15 according to the shape relationship. At this time, the door corner liner is located between the first lower electrode 14 and / or the second lower electrode 15 and the corner part of the door shell main board.

[0067] Start the refrigeration equipment door shell spot welder, and the refrigeration equipment door shell spot welder welds the door corner liner to the corner part of the door shell main board, realizing the spot welding connection of the hemming forming the corner seam, and enhancing the strength of the corner part of the door shell main board.

[0068] Further, the refrigeration equipment door shell spot welder welding the door corner liner to the corner part of the door shell main board includes the following steps:

[0069] Control the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 of the refrigeration equipment door shell spot welder to move downward to shape the corner part;

[0070] Control the first clamping cylinder 10 and the second clamping cylinder 11 to move towards the first lower electrode and the second lower electrode to clamp the door shell main board;

[0071] Control the servo motor 3 and the longitudinal propulsion cylinder 5 to work, and move the upper electrode 17 above the first lower electrode and / or the second lower electrode;

[0072] Control the welding pressure cylinder 16 to move downward until the upper electrode contacts the corner part of the door shell main board for spot welding; at this time, the upper electrode, the corner part of the door shell main board, the door corner liner, and the lower electrode are in contact in sequence, and the upper and lower electrodes are energized to realize the spot welding connection of the corner part of the door shell main board and the door corner liner.

[0073] Further, in one embodiment, the door shell manufacturing method further includes the following steps:

[0074] Hem the door handle sheet metal part to form a door handle; such as Figure 4The shown door handle sheet metal part B is hemmed to obtain a door handle as shown in Figure 7 the shown door handle;

[0075] The door handle is fixedly installed on the main door shell board to obtain a door shell of a refrigeration device.

[0076] Furthermore, fixedly installing the door handle on the main door shell board includes the following steps:

[0077] Spot weld the side of the door handle in contact with the main door shell board. After pre-installing the door handle and the main door shell board, as shown in Figure 7 the hem connected to the first hem part B1 contacts the third hem A133 as shown. After contact, spot weld these two contacting hems, such as by performing current spot welding, to achieve welded fixation.

[0078] Use rivets to rivet and fix the second and fourth border parts of the door handle in contact with the main door shell board; the first hem part B1 of the door handle is provided with a fifth through hole B13 and a sixth through hole B14; when installing the door handle on the main door shell board, the fifth through hole B13 coincides with the third through hole A13 on the main door shell board, and the sixth through hole B14 coincides with the fourth through hole A14 on the main door shell board. The door handle B can be fixed to the main door shell board A by using rivets through the fifth through hole B13 and the third through hole A13, and the sixth through hole B14 and the fourth through hole A14.

[0079] Furthermore, the above method for manufacturing the door shell further includes the step: machining to obtain the door corner liner, and the shape of the above door corner liner, the shape of the upper and lower electrodes, and the shape of the corner part of the door shell are substantially the same. The corner part of the main door shell board is formed by hemming the door shell sheet metal parts. As shown in Figure 6 it, a hem seam A2 is formed at the corner part. The door corner liner can be spot welded to the hem forming the hem seam A2 by a door shell spot welder, preventing the hem from being broken during foaming, which is beneficial to improving the strength of the door shell and the product quality.

[0080] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A manufacturing method of a door shell of a refrigeration device, characterized in that, Applicable to the spot welder for the door shell of refrigeration equipment, the spot welder for the door shell of refrigeration equipment includes a machine table, a horizontal precision positioning workbench, a servo motor, a longitudinal linear slide, a longitudinal propulsion cylinder, a first shaping cylinder, a second shaping cylinder, a first shaping block, a second shaping block, a first clamping cylinder, a second clamping cylinder, a first clamping block, a second clamping block, a first lower electrode, a second lower electrode, a welding pressure cylinder, and an upper electrode; The manufacturing method of the door shell of refrigeration equipment includes the following steps: Fold the sheet metal part of the door shell main board to form the door shell main board; Place the door angle lining corresponding to the shape of the corner part of the door shell main board above the first lower electrode and / or the second lower electrode; then place the corner part of the door shell main board above the door angle lining; Start the spot welder for the door shell of refrigeration equipment, and the spot welder for the door shell of refrigeration equipment welds the door angle lining to the corner part of the door shell main board; The process of the spot welder for the door shell of refrigeration equipment welding the door angle lining to the corner part of the door shell main board includes the following steps: Control the moving blocks of the first shaping cylinder and the second shaping cylinder to move downward to shape the corner part; Control the first clamping cylinder and the second clamping cylinder to move towards the first lower electrode and the second lower electrode to clamp the door shell main board; Control the servo motor and the longitudinal propulsion cylinder to work, and move the upper electrode above the first lower electrode and / or the second lower electrode; Control the welding pressure cylinder to move downward until the upper electrode contacts the corner part of the door shell main board for spot welding; A working platform is arranged on the machine table, the first lower electrode and the second lower electrode are arranged on the working platform, and the positions of the first lower electrode and the second lower electrode correspond to each other in the horizontal direction; A longitudinal linear slide is arranged on the transverse precision positioning workbench. The welding pressure cylinder is installed on the longitudinal linear slide. The longitudinal propulsion cylinder is installed on one side of the longitudinal linear slide and can push the welding pressure cylinder to move along the longitudinal linear slide. An upper electrode is arranged below the moving block of the welding pressure cylinder. The first shaping cylinder and the second shaping cylinder are respectively and fixedly arranged on both sides of the welding pressure cylinder. The first shaping block is installed on the moving block of the first shaping cylinder. The second shaping block is installed on the moving block of the second shaping cylinder. A servo motor is arranged on one side of the transverse precision positioning workbench. The servo motor can push the longitudinal linear slide to move along the transverse precision positioning workbench. The first shaping block can move downward under the push of the first shaping cylinder until it abuts against the first lower electrode. The second shaping block can move downward under the push of the second shaping cylinder until it abuts against the second lower electrode. The first clamping cylinder and the second clamping cylinder extend outside the workbench surface. The first clamping cylinder corresponds to the first lower electrode in the longitudinal position. The second clamping cylinder corresponds to the second lower electrode in the longitudinal position. The first clamping block is arranged on the moving block of the first clamping cylinder. The second clamping block is arranged on the moving block of the second clamping cylinder.

2. The manufacturing method of a door shell of a refrigeration device according to claim 1, characterized in that, The refrigerator door shell spot welder further includes an intermediate frequency welder, which is an intermediate frequency inverter DC resistance welder with a control frequency of 1 kHz.

3. A manufacturing method of a door shell of a refrigeration device according to claim 1, characterized in that, The refrigerator door shell spot welder further includes an electrical control system, which uses a PLC to control the movement of the servo motor, the longitudinal propulsion cylinder, the first shaping cylinder, the second shaping cylinder, the first clamping cylinder and the second clamping cylinder.

4. A manufacturing method of a door shell of a refrigeration device according to claim 1, characterized in that, Mechanism threaded holes are arranged on the moving blocks of the first shaping cylinder and the second shaping cylinder. The first shaping block and the second shaping block are respectively installed on the moving blocks of the first shaping cylinder and the second shaping cylinder through the mechanism threaded holes. Alternatively, mechanism threaded holes are arranged on the moving blocks of the first clamping cylinder and the second clamping cylinder. The first clamping block and the second clamping block are respectively installed on the moving blocks of the first clamping cylinder and the second clamping cylinder through the mechanism threaded holes.

5. The manufacturing method of the refrigerator door shell according to claim 1, characterized in that It further includes: Folding the door handle sheet metal part to form a door handle. Fixing and installing the door handle on the door shell main board to obtain the door shell.

6. The manufacturing method of the refrigerator door shell according to claim 5, characterized in that, The step of fixing and installing the door handle on the door shell main board includes the following steps: Spot welding the side of the above-mentioned door handle in contact with the door shell main board. Using rivets to rivet and fix the second border part and the fourth border part of the door handle and the door shell main board in contact with each other.

7. The manufacturing method of the refrigeration equipment door shell according to claim 6, characterized in that, It further includes the step of: Machining to obtain the door corner liner.

8. The manufacturing method of the refrigeration equipment door shell according to any one of claims 1-7, characterized in that, The corner part of the door shell main board is formed by folding the door shell sheet metal part.

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