阅读说明：本技术 一种制冷设备门壳点焊机及门壳制造方法 (Spot welding machine for door shell of refrigeration equipment and manufacturing method of door shell ) 是由 钱国卫 余本芬 徐孟笔 于 2021-08-12 设计创作，主要内容包括：本发明涉及一种制冷设备门壳点焊机及门壳制造方法,该制冷设备门壳点焊机包括机台、横向精密定位工作台、伺服电机、纵向直线滑台、纵向推进气缸、第一整形气缸、第二整形气缸、第一整形块、第二整形块、第一夹紧气缸、第二夹紧气缸、第一夹紧块、第二夹紧块、第一下电极、第二下电极、焊接加压气缸、上电极；机台上设置工作平台,所述第一下电极和第二下电极设置在所述工作平台上,所述第一下电极和第二下电极在横向上的位置相对应。利用该制冷设备门壳点焊机进行智能设备门壳的加工,无需进行氩弧焊,更加安全和高效。(The invention relates to a spot welder for a door shell of refrigeration equipment and a manufacturing method of the door shell, wherein the spot welder for the door shell of the refrigeration equipment comprises a machine table, a transverse precision positioning workbench, a servo motor, a longitudinal linear sliding table, a longitudinal pushing 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 pressurizing 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 first lower electrode and the second lower electrode are corresponding in position in the transverse direction. The spot welding machine for the door shell of the refrigeration equipment is used for machining the door shell of the intelligent equipment, argon arc welding is not needed, and the spot welding machine is safer and more efficient.)

1. A spot welding machine for a door shell of refrigeration equipment is characterized by comprising a machine table, a transverse precision positioning workbench, a servo motor, a longitudinal linear sliding table, 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 pressurization 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 first lower electrode and the second lower electrode are corresponding in position in the transverse direction;

the transverse precision positioning workbench is provided with the longitudinal linear sliding table, the welding pressurizing cylinder is installed on the longitudinal linear sliding table, and the longitudinal propelling cylinder is installed on one side of the longitudinal linear sliding table and can push the welding pressurizing cylinder to move along the longitudinal linear sliding table; an upper electrode is arranged below the motion block of the welding pressurizing cylinder; the first shaping cylinder and the second shaping cylinder are fixedly arranged on two sides of the welding pressurizing cylinder respectively; the first shaping block is arranged on the moving block of the first shaping cylinder; the second shaping block is arranged on the moving block of the second shaping cylinder; the servo motor is arranged on one side of the transverse precision positioning workbench; the servo motor can push the longitudinal linear sliding table to move along the transverse precision positioning workbench; the first shaping block can move downwards under the pushing of the first shaping cylinder until the first shaping block abuts against the first lower electrode; the second shaping block can move downwards under the pushing of the second shaping cylinder until the second shaping block abuts against the second lower electrode; the first clamping cylinder and the second clamping cylinder extend to be arranged on the outer side of the working table surface, the first clamping cylinder corresponds to the first lower electrode in the longitudinal direction, and the second clamping cylinder corresponds to the second lower electrode in the longitudinal direction; the first clamping block is arranged on the movable block of the first clamping cylinder; the second clamping block is arranged on the movable block of the second clamping cylinder.

2. The spot welder for door shells of refrigeration equipment according to claim 1, further comprising a medium frequency welder, wherein the medium frequency welder is a medium frequency inverter direct current resistance welder with a control frequency of 1 kHz.

3. The spot welder for door shells of refrigeration equipment according to claim 1, further comprising an electrical control system, wherein the electrical control system uses a PLC to control the servo motor, the longitudinal propulsion cylinder, the first shaping cylinder, the second shaping cylinder, the first clamping cylinder and the second clamping cylinder to move.

4. The spot welder for the door shell of the refrigerating equipment as claimed in claim 1, wherein the moving blocks of the first and second shaping cylinders are provided with machine threaded holes, and the first and second shaping blocks are respectively mounted on the moving blocks of the first and second shaping cylinders through the machine threaded holes;

or the moving blocks of the first clamping cylinder and the second clamping cylinder are provided with machine threaded holes, and 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 machine threaded holes.

5. A manufacturing method of a refrigeration equipment door shell is characterized by comprising the following steps:

folding the sheet metal part of the door shell main plate to form the door shell main plate;

placing a door angle liner plate corresponding to the shape of the corner part of the door shell main plate above the first lower electrode and/or the second lower electrode of the refrigeration equipment door shell spot welding machine according to any one of claims 1 to 4; then placing the corner part of the door shell main board above the door corner lining board;

and starting the refrigeration equipment door shell spot welding machine, wherein the refrigeration equipment door shell spot welding machine is used for welding the door corner lining plate to the corner part of the door shell main plate.

6. The method for manufacturing a door shell of a refrigerating device as recited in claim 5, wherein the door shell spot welder welds the door angle lining board to the corner portion of the door shell main plate, comprising the steps of:

controlling the moving blocks of the first shaping cylinder and the second shaping cylinder to move downwards to shape the corner part;

controlling a first clamping cylinder and a second clamping cylinder to move towards the first lower electrode and the second lower electrode to clamp the door shell main board;

controlling a servo motor and a longitudinal propulsion cylinder to work, and moving the upper electrode to be above the first lower electrode and/or the second lower electrode;

and controlling the welding pressurizing cylinder to move downwards until the upper electrode is contacted with the corner part of the main board of the door shell, and performing spot welding.

7. The method of manufacturing a door shell for a refrigeration appliance according to claim 6, further comprising:

folding the sheet metal part of the door handle to form the door handle;

and fixedly installing the door handle on the door shell main board to obtain the door shell.

8. The method for manufacturing a door shell of a refrigerating device according to claim 7, wherein the step of fixedly mounting the door handle on the door shell main plate comprises the following steps:

spot welding the contact side of the door handle and the door shell main board;

and riveting and fixing the second frame part and the fourth frame part, which are contacted with the door handle and the door shell main board, by using rivets.

9. The method of manufacturing a door shell for a refrigeration appliance according to claim 5, further comprising the steps of:

and processing to obtain the door corner lining plate.

10. The manufacturing method of the door shell of the refrigeration equipment as recited in any one of claims 5 to 9, wherein the corner portions of the main plate of the door shell are formed by folding edges of sheet metal parts of the door shell.

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a spot welding machine for a door shell of the refrigeration equipment and a manufacturing method of the door shell.

Background

At present, some refrigeration equipment door shells are processed by sheet metal parts; the door shell generally comprises a door main plate and a door handle; in the manufacturing process of the traditional door shell, the splice angle of the door main board is polished after being welded by argon arc welding, and the door handle and the door main board are welded together by argon arc welding. However, the argon arc welding has high requirements on the technical level of workers, and certain construction risks exist in the argon arc welding; in addition, the thickness of door shell is generally less, often only 0.5mm, so to argon arc welding requirement just higher, the work is not normal or argon arc welds equipment and sets up improper not only probably to cause the sheet metal component to burn through or burn black, also probably to cause the rosin joint, so can influence the pleasing to the eye or the firmness of door shell to influence refrigeration plant's quality.

Disclosure of Invention

Based on the above problems, the present invention aims to provide a spot welding machine for a door shell of a refrigeration equipment and a manufacturing method for the door shell, wherein the spot welding machine for the door shell is used for manufacturing the door shell without argon arc welding, so that the operation safety can be improved, and the quality of the door shell can be improved.

The technical scheme includes that the spot welding machine for the door shell of the refrigeration equipment comprises a machine table 1, a transverse precision positioning workbench 2, a servo motor 3, a longitudinal linear sliding table 4, a longitudinal propelling 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 pressurizing cylinder 16 and an upper electrode 17;

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 first lower electrode 14 and the second lower electrode 15 are corresponding in position in the transverse direction;

the transverse precision positioning workbench 2 is provided with the longitudinal linear sliding table 4, the welding pressurizing air cylinder 16 is installed on the longitudinal linear sliding table 4, and the longitudinal propelling air cylinder 5 is installed on one side of the longitudinal linear sliding table and can push the welding pressurizing air cylinder 16 to move along the longitudinal linear sliding table 4; an upper electrode 17 is arranged below the motion block of the welding pressurizing cylinder 16; a first shaping cylinder 6 and a second shaping cylinder 7 are respectively and fixedly arranged on two sides of the welding pressurizing cylinder 16; the first shaping block 8 is arranged on the moving block of the first shaping cylinder 6; the second shaping block 9 is arranged on the moving block of the second shaping cylinder 7; 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 sliding table 4 to move along the transverse precision positioning workbench 2; the first shaping block 8 can move downwards under the pushing of the first shaping cylinder 6 until the first shaping block abuts against the first lower electrode; the second shaping block 9 can move downwards under the pushing of the second shaping cylinder 7 until the second shaping block 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; the first clamping block 12 is arranged on the movable block of the first clamping cylinder 10; the second clamping block 13 is disposed on the movable block of the second clamping cylinder 11.

Optionally, the welding machine further comprises an intermediate frequency welding machine 18, wherein the intermediate frequency welding machine 18 is an intermediate frequency inverter direct current resistance welding machine, and the control frequency is 1 kHz.

Optionally, the device further comprises an electrical control system, and the electrical control system controls 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 to move by adopting a PLC.

Optionally, the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 are provided with machine-made threaded holes, and the first shaping block 8 and the second shaping block 9 are respectively mounted on the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 through the machine-made threaded holes;

or the moving blocks of the first clamping cylinder 10 and the second clamping cylinder 11 are provided with machine threaded holes, 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 machine threaded holes.

The embodiment of the application also provides a manufacturing method of the door shell of the refrigeration equipment, which comprises the following steps:

folding the sheet metal part of the door shell main plate to form the door shell main plate;

placing a door angle lining plate corresponding to the shape of the corner part of the door shell main plate above the first lower electrode and/or the second lower electrode of the refrigeration equipment door shell spot welding machine; then placing the corner part of the door shell main board above the door corner lining board;

and starting the refrigeration equipment door shell spot welding machine, wherein the refrigeration equipment door shell spot welding machine is used for welding the door corner lining plate to the corner part of the door shell main plate.

Optionally, the step of welding the door corner lining plate to the corner part of the door shell main plate by the refrigeration equipment door shell spot welding machine includes the following steps:

the moving blocks of the first shaping cylinder 6 and the second shaping cylinder 7 are controlled to move downwards to shape the corner;

controlling 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;

controlling the servo motor 3 and the longitudinal propulsion cylinder 5 to work, and moving the upper electrode 17 above the first lower electrode and/or the second lower electrode;

and controlling the welding pressurizing cylinder 16 to move downwards until the upper electrode is contacted with the corner part of the main board of the door shell, and performing spot welding.

Optionally, the method further includes:

folding the door handle sheet metal part to form a door handle;

and fixedly installing the door handle on the door shell main board to obtain the door shell.

Optionally, the step of fixedly mounting the door handle to the door shell main plate includes the following steps:

spot welding the contact side of the door handle and the door shell main board;

and riveting and fixing the second frame part and the fourth frame part, which are contacted with the door handle and the door shell main board, by using rivets.

Optionally, the method further comprises the steps of:

and processing to obtain the door corner lining plate.

Optionally, the corner of the door shell main board is spliced by a door shell sheet metal part folded edge.

The spot welding machine for the door shell of the refrigeration equipment comprises an upper electrode, a lower electrode, a first shaping block, a second shaping block, a first pressing block and a second pressing block, and can be used for shaping and pressing a sheet metal part to be welded, which is placed on the lower electrode, and then performing spot welding on the sheet metal part to be welded by using the upper electrode and the lower electrode; the spot welding machine for the door shell of the refrigeration equipment is particularly suitable for spot welding of corner portions of a main board of the door shell of the refrigeration equipment, so that argon arc welding is not needed when the door shell of the refrigeration equipment is manufactured, and the processing efficiency and the operation safety of the door shell of the refrigeration equipment are improved.

The embodiment of the application also provides a manufacturing method of the door shell of the refrigeration equipment, and the spot welding of the corner part of the main plate of the door shell is carried out by utilizing the spot welding machine of the door shell of the refrigeration equipment, so that the argon arc welding is not needed when the door shell of the refrigeration equipment is produced and manufactured, and the processing efficiency and the operation safety of the door shell of the refrigeration equipment are favorably improved.

Drawings

Fig. 1 is a schematic structural diagram of a spot welder for a door shell of a refrigeration device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of a spot welder for a door shell of a refrigeration device provided by an embodiment of the present application;

FIG. 3 is a schematic structural view of a door angle lining plate provided by the embodiment of the application;

FIG. 4 is a schematic structural diagram of a door shell main body sheet metal part and a door handle sheet metal part provided by the embodiment of the application;

FIG. 5 is a schematic structural view of the door shell body formed after flanging the door shell body sheet metal part of FIG. 4;

FIG. 6 is an enlarged schematic view of a corner portion of the main body of the door shell of FIG. 5;

fig. 7 shows the door pull formed by folding the door pull sheet metal member shown in fig. 4.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The following examples are, however, merely preferred and not exhaustive of the invention. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the following description, the appearances of the indicating orientation or positional relationship such as the terms "inner", "outer", "upper", "lower", "left", "right", etc. are only for convenience in describing the embodiments and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

At present, a refrigeration equipment door shell is generally flanged by a machined sheet metal part to form a preliminary door shell shape, then the flanged position needing fixed connection is welded by argon arc welding, and the welded position needs to be polished after the argon arc welding, so that the process is multiple, the processing cost is high, the argon arc welding is easy to rosin joint to cause poor product quality, the argon arc welding is easy to overweld, and the quality and the attractiveness are influenced.

Based on this, the embodiment of the application provides a spot welder for a door shell of a refrigeration device, as shown in fig. 1-2, the spot welder for a door shell comprises a machine table 1, a transverse precision positioning workbench 2, a servo motor 3, a longitudinal linear sliding table 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 pressurization cylinder 16 and an upper electrode 17;

the machine table 1 is a base support of the whole door shell spot welding machine, other components are arranged on the machine table, and the positions of the other components are shown in figure 1; specifically, a working platform 101 is arranged on the machine table 1, a first lower electrode 14 and a second lower electrode 15 are arranged on the working platform 101, and the first lower electrode 14 and the second lower electrode 15 are corresponding in position in the transverse direction; the sheet metal part to be welded is placed on the lower electrode, and the upper electrode 17 is moved to be in contact with the sheet metal part to be welded, so that the sheet metal part to be welded can be spot-welded by using the upper and lower electrodes.

The transverse precision positioning workbench 2 is provided with the longitudinal linear sliding table 4, the welding pressurizing cylinder 16 is arranged on the longitudinal linear sliding table 4, as shown in fig. 2, the welding pressurizing cylinder 16 is arranged at the front end of the longitudinal linear sliding table 4, the longitudinal propelling cylinder 5 is arranged on one side of the longitudinal linear sliding table, and the welding pressurizing cylinder 16 can be pushed to move along the longitudinal linear sliding table 4, so that the control of the longitudinal position of the welding pressurizing cylinder 16 is realized; an upper electrode 17 is arranged below the motion block of the welding pressurizing cylinder 16; a first shaping cylinder 6 and a second shaping cylinder 7 are respectively and fixedly arranged at two sides of the welding pressurizing cylinder 16; the welding pressurizing cylinder 16 moves, and 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 arranged on the moving block of the first shaping cylinder 6; the second shaping block 9 is arranged on the moving block of the second shaping cylinder 7; the first and second shaping blocks 8 and 9 are movable with longitudinal movement of the first and second shaping cylinders 6 and 7, respectively. The first shaping block 8 can move downwards under the pushing of the first shaping cylinder 6 until the first shaping block abuts against the first lower electrode 14; the second shaping block 9 can move downwards under the pushing of the second shaping cylinder 7 until the second shaping block abuts against the second lower electrode 15, so that the sheet metal part to be welded, which is placed on the lower electrode, is shaped;

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 sliding table 4 to move along the transverse precision positioning workbench 2; that is, the servo motor 3 can control the lateral position movement of the longitudinal linear slide table 4, and further can control the lateral positions of the welding pressurizing cylinder 16, the first shaping cylinder 6, and the second shaping cylinder 7.

Further, as shown in fig. 1 and 2, a first clamping cylinder 10 and a second clamping cylinder 11 are extended and arranged outside the working table 101, the first clamping cylinder 10 corresponds to the position of the first lower electrode 14 in the longitudinal direction, and the second clamping cylinder 11 corresponds to the position of the second lower electrode 15 in the longitudinal direction; the first clamping block 12 is arranged on the movable block of the first clamping cylinder 10; the second clamping block 13 is arranged on the movable block of the second clamping cylinder 11; the sheet metal parts to be welded, which are placed on the first lower electrode 14 and the second lower electrode 15, can be fixed by controlling the first clamping cylinder 10 and the second clamping cylinder 11, and after the sheet metal parts to be welded are clamped and fixed, the upper and lower electrodes are utilized for spot welding.

The spot welding machine for the door shell of the refrigeration equipment is a tool device capable of automatically shaping and continuously welding in a spot manner; the welding pressurizing cylinder 16 is vertically arranged on a moving platform of the longitudinal linear sliding table 4, and the welding pressurizing cylinder 16 can move back and forth on the longitudinal linear sliding table 4 through the action of the longitudinal propelling cylinder 5.

In one embodiment, the upper electrode 17 is made of a copper block and is square, and is mounted on a moving block of the welding pressurizing cylinder 16, and the two actions of pressurizing, descending, releasing and ascending are completed by controlling the welding pressurizing cylinder 16, so that the purposes of pressurizing welding, releasing and replacing materials are achieved.

Specifically, the longitudinal propulsion cylinder 5 is a stroke-adjustable linear motion cylinder, and the purpose of controlling the longitudinal motion distance of the welding pressurizing cylinder 16 can be achieved by adjusting the stroke, so that the longitudinal position of the upper electrode 17 can be controlled.

The servo motor 3 is arranged at one end of the transverse precise positioning workbench 2 and is connected with the precise screw rod, the precise screw rod is driven to rotate by controlling the servo motor 3, the purpose of transversely positioning and moving the longitudinal linear sliding table 4 can be achieved, and the transverse position of the upper electrode 17 can be controlled.

In fig. 2, the first bottom electrode 14 and the second bottom electrode 15 are symmetrically fixed on the machine 1, and in one embodiment, the machine 1 may be insulated and isolated by an insulating plate, so as to prevent the electrodes from conducting electricity to the machine and causing an electric shock risk. In addition, the first lower electrode 14 and the second lower electrode 15 can be formed by processing copper blocks according to the side pattern of the corner part required to be welded on the main board of the door shell, such as the first lower electrode 14 and the second lower electrode 15 shown in fig. 2, the door corner lining board shown in fig. 3 and the corner part shown in fig. 6 are similar in shape; during spot welding, firstly placing the door corner lining plate on the first lower electrode 14 or the second lower electrode 15, and then placing the corner of the door panel main body formed after folding the edge shown in fig. 5 on the first lower electrode 14 or the second lower electrode 15, namely, the door corner lining plate is positioned between the first lower electrode 14 or the second lower electrode 15 and the corner of the door panel main body; then the servo motor 3 and the longitudinal propulsion cylinder 5 are controlled to move the welding pressurizing cylinder 16 to the position above the first lower electrode 14 or the second lower electrode 15; finally, the pressurizing descending and loosening ascending actions of the upper electrode are completed through the control of the welding pressurizing cylinder 16, so that the spot welding connection of the edge parts of the door corner lining plate and the door shell main plate is realized. The first lower electrode 14 and the second lower electrode 15 can be used not only as lower electrodes during welding but also as molds for shaping and clamping fastening timing; 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 shape the corner of the main plate of the door shell; first bottom electrode 14 and second bottom electrode 15 press from both sides tight piece 13 butt through first tight piece 12 of clamp and second respectively, realize pressing from both sides tight fixedly to the door shell mainboard, press from both sides and conveniently carry out spot welding after fixed, have guaranteed the accuracy of spot welding position and the reliability of spot welding.

Specifically, the first shaping cylinder 6 and the second shaping cylinder 7 are linear cylinders with guide rods, the front ends of the linear cylinders are provided with moving blocks, machine-made threaded holes are preset, and other components can be installed through bolts. The first shaping block 8 and the second shaping block 9 are steel blocks and are respectively arranged 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 machined smooth planes, and the purpose of flattening the side seams of the corners of the door shell main board preset on the first lower electrode 14 and the second lower electrode 15 is achieved through the action of the first shaping cylinder 6 and the second shaping cylinder 7 in the vertical direction.

The first clamping cylinder 10 and the second clamping cylinder 11 are linear cylinders with self-provided guide rods. The front end of the device is provided with a moving block, a machine-made threaded hole is preset, 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 extend to the outer side of the working table 101. The first clamping block 12 and the second clamping block 13 are shaped as a steel profile block, and can be made in a shape of a front face (see fig. 5 and 6, from inside to outside of the paper) of a main board corner of the door shell.

The first clamping block 12 and the second clamping block 13 are respectively arranged on the motion block at the front end of the first clamping cylinder 10 and the front end of the second clamping cylinder 11, the purpose of clamping and fixing the door shell main board is achieved through the longitudinal action of the first clamping cylinder 10 and the second clamping cylinder 11, and meanwhile, the calibration and adjustment effects are achieved on the relative bending angles of the front faces of the corners of the door shell main board.

Further, in one embodiment, the upper and lower electrodes are controlled by a medium frequency welder 18, the medium frequency welder 18 being a medium frequency inverter dc resistance welder that provides energy support for welding. The control frequency is 1kHz, the current control is rapid and accurate, the splashing rate is greatly reduced, and the quality of welding spots is effectively improved. The welding current is direct current, so that the influence of different inductive resistances of welding materials on the welding current can be greatly reduced. In order to facilitate the setting of the welding parameters, a display screen 181 can be further provided on the intermediate frequency welding machine 18.

Further, in order to realize control over various cylinders and motors, the spot welding machine for the door shell of the refrigeration equipment further comprises an electric control system, as shown in the icons 191 and 192, wherein the electric control system adopts a Programmable Logic Controller (PLC) to control 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 to move. The electrical control system 19 provides power and automatic operation support for the equipment, and realizes transverse and longitudinal multi-point automatic moving positioning and automatic power-on welding of the upper electrode through PLC programming of the electrical control system, thereby realizing continuous actions of clamping, shaping and multi-point welding.

The embodiment of the application provides a refrigeration plant door shell, this refrigeration plant door shell need not to carry out argon arc welding technology processing, and this refrigeration plant door shell has advantages such as sound construction, processing convenience. Specifically, as shown in fig. 3-7, the refrigeration device comprises a door shell main plate a, a door angle lining plate C and a door handle B.

As shown in fig. 5, the door case main board includes a main body 00, a first frame portion 01 is disposed on a first side of the main body 00, a second frame portion 02 is disposed on a second side of the main body 00, a third frame portion 03 is disposed on a third side of the main body 00, and a fourth frame portion 04 is disposed on a fourth side of the main body 00; the corner part of the second frame part 02 close to the third frame part 03 is provided with a crease; as shown in FIG. 6, FIG. 6 shows a schematic view of the corner of the main panel of the door shell, with a crease A2 on the upper side; the fourth frame portion 04 also has a crease (not shown) near the corner of the third frame portion 03; the door corner lining plate is arranged inside the corner of the door shell and is connected with the folded edge forming the folded seam A2 in a spot welding manner; the hem of the hem A2 of the corner part of the door corner lining plate is subjected to spot welding, so that the hem is effectively prevented from cracking when the door shell is foamed; the door handle B is fixedly connected with the door shell main board A.

Further, as shown in fig. 4 and 5, the first frame portion 01, the second frame portion 02, the third frame portion 03 and the fourth frame portion 04 are formed by folding the sheet metal component of the main plate of the door shell as shown in fig. 4; in an embodiment, this door shell mainboard sheet metal component's shape is as shown in fig. 4, carries out the hem according to the dotted line and becomes the door shell mainboard that figure 5 is shown, during the hem, carries out the angle and the radian control of hem as required, and this application does not make the requirement to this, can roll over into corresponding door shell mainboard can.

Further, as shown in fig. 5, the folded edge where the first frame portion 01 and the second frame portion 02 are overlapped is provided with a first through hole a 11; the first frame portion 01 and the second frame portion 02 are fixed by a rivet through the first through hole a 11; the folded edge of the first frame part 01 and the fourth frame part 04 is provided with a second through hole A12; the first frame portion 01 and the fourth frame portion 04 are fixed by rivets through the second through holes a12, thereby reinforcing the strength of the door case main board.

Further, as shown in fig. 5 to 6, the third frame portion includes a first folding edge a131, a second folding edge a132 and a third folding edge a 133; an included angle between the plane of the first folding edge A131 and the plane of the door shell body 00 is an acute angle; the plane of the second folded edge A132 is parallel to the plane of the door shell main body 00; the plane of the third folding edge a133 is perpendicular to the plane of the door shell main body 00.

Further, in one embodiment, as shown in fig. 5, a third through hole a13 is provided on the second frame portion 02 near the third folding edge a 133; the fourth frame portion 04 is provided with a fourth through hole a14 near the third folding edge a 133.

In addition to the above embodiments, as shown in fig. 4 and 7, the door handle is formed by folding a door handle sheet metal member, and as shown in fig. 7, the door handle has a first body portion B2 and a first folding portion B1; the first main body part comprises two sections of folding edges which are vertical to each other, and the two sections of folding edges which are vertical to each other are connected by an arc-shaped folding edge; the first folding edge part is connected with one of the folding edges which are perpendicular to each other, and the first folding 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 and the third through hole A13 are overlapped, the sixth through hole B14 and the fourth through hole A14 are overlapped, and the door handle B is fixed on the door shell main board A through the fifth through hole B13, the third through hole A13, the sixth through hole B14 and the fourth through hole A14 by rivets; in order to further ensure the connection strength of the door handle and the door shell main board, spot welding can be carried out on the third folding edge A133 and the folded edge of the door handle connected with the first folding edge part B1, namely, the third folding edge A133 and one folded edge of the first main body part B2 connected with the first folding edge part B1 are fixed by spot welding; in particular, current spot welding fixation can be performed.

Above-mentioned refrigeration plant door shell just can accomplish processing through hem, spot welding and fix with rivet, has stable in structure's advantage, and stable structure makes it be difficult to split when foaming, is favorable to improving refrigeration plant's performance and quality.

Further, the embodiment of the application also provides a manufacturing method of the door shell of the refrigeration equipment, which is used for manufacturing the door shell of the refrigeration equipment without argon arc welding and comprises the following steps:

folding the sheet metal part of the door shell main plate to form the door shell main plate; specifically, carry out the hem, form the door shell mainboard that fig. 5 shows to door shell sheet metal component according to the needs that fig. 4 shows, concrete hem mode is just right as long as can realize door shell mainboard shape, and hem angle, radian and number of times go on as required, and this application does not do the restriction to this.

Placing the door angle lining plate corresponding to the shape of the corner part of the door shell main plate above the first lower electrode and/or the second lower electrode of the refrigeration equipment door shell spot welding machine; then placing the corner part of the door shell main board above the door corner lining board; that is, the door corner lining plate C shown in fig. 3 is placed above the first lower electrode 14 and/or the second lower electrode 15, and then the corner portion (shown in fig. 6) of the door case main plate shown in fig. 5 is also placed above the first lower electrode 14 and/or the second lower electrode 15; the shapes of the upper parts of the first lower electrode 14 and/or the second lower electrode 15 correspond to the shapes of the corner parts of the main board of the door shell, and the corner parts of the main board of the door shell are placed above the first lower electrode 14 and/or the second lower electrode 15 according to the shape relation. At this time, the door corner lining is located above the first lower electrode 14 and/or the second lower electrode 15 and between the door case main plate corner portions.

Starting refrigeration plant door shell spot welder, refrigeration plant door shell spot welder will the corner portion of door corner welt welding door shell mainboard, realize connecting the spot welding of the hem that forms the corner portion hem, has strengthened the intensity at door shell mainboard hem portion.

Further, the refrigeration plant door shell spot welder with the corner welt weld to the corner portion of door shell mainboard includes following step:

controlling the motion blocks of a first shaping cylinder 6 and a second shaping cylinder 7 of the spot welder for the door shell of the refrigeration equipment to move downwards and shaping the corner parts of the edges;

controlling a first clamping cylinder 10 and a second clamping cylinder 11 to move towards the directions of a first lower electrode and a second lower electrode to clamp the door shell main board;

controlling the servo motor 3 and the longitudinal propulsion cylinder 5 to work, and moving the upper electrode 17 above the first lower electrode and/or the second lower electrode;

controlling the welding pressurizing cylinder 16 to move downwards until the upper electrode is contacted with the corner part of the main board of the door shell, and performing spot welding; at the moment, the upper electrode, the edge part of the main plate of the door shell, the door corner lining plate and the lower electrode are sequentially contacted, and the upper electrode and the lower electrode are electrified to realize the spot welding connection of the edge part of the main plate of the door shell and the door corner lining plate.

Further, in one embodiment, the door case manufacturing method further includes the steps of:

folding the sheet metal part of the door handle to form the door handle; folding the sheet metal part B of the door handle shown in FIG. 4 to obtain the door handle shown in FIG. 7;

and fixedly installing the door handle on the door shell main board to obtain the refrigeration equipment door shell.

Further, the step of fixedly mounting the door handle on the door shell main board comprises the following steps:

spot welding is carried out on one side of the door handle, which is contacted with the door shell main board, after the door handle and the door shell main board are pre-installed, the folded edge connected with the first folded edge part B1 is contacted with the third folded edge A133 shown in figure 7, and after the door handle and the door shell main board are contacted, spot welding is carried out on the two contacted folded edges, for example, current spot welding is carried out, and welding fixation is realized.

Riveting and fixing a second frame part and a fourth frame part, which are in contact with the door handle and the door shell main board, by using rivets; the first hem part B1 of the door handle 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 is overlapped with the third through hole A13 on the door shell main board, the sixth through hole B14 is overlapped with the fourth through hole A14 on the door shell main board, and the door handle B can be fixed on the door shell main board A through the fifth through hole B13, the third through hole A13, the sixth through hole B14 and the fourth through hole A14 by rivets.

Further, the manufacturing method of the door shell further comprises the following steps: and processing to obtain the door corner lining plate, wherein the shape of the door corner lining plate, the shape of the upper and lower electrodes and the shape of the corner part of the door shell are approximately the same. The bight of door shell mainboard is pieced together by door shell sheet metal component hem, as shown in fig. 6, has formed hem A2 in the bight, can carry out spot welding with door angle welt and the hem that forms hem A2 through door shell spot welder, places the hem and is broken when foaming, is favorable to improving the intensity of door shell, improves product quality.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.