CN111276325A - Manufacturing and processing method of metal shell of power transformer - Google Patents

Abstract

The invention relates to a method for manufacturing and processing a metal shell of a power transformer, which mainly includes the following steps: overall design, preparation, molding, grinding, welding and other processes. The shell grinding equipment used includes a bottom plate, a docking device , positioning device, telescopic device and grinding device, the present invention can solve the following problems existing in grinding and welding of existing cooling pipes and transformer boxes: a, traditional cooling pipes and transformer boxes need to be manually held during grinding The heat pipe and the transformer box, and then use the grinding machine to grind the connection between the heat pipe and the transformer box. The labor intensity of workers is too large, the grinding time is long, and the installation efficiency is not high; b, the existing heat pipe and transformer box During welding, manual welding machine is used to weld the connection between the heat pipe and the transformer box. The connection between the heat pipe and the transformer box is unstable, which affects the heat dissipation function of the transformer.

Description

A method for making and processing a metal shell of a power transformer

technical field

The invention relates to the technical field of power transformer production, in particular to a method for manufacturing and processing a metal shell of a power transformer.

Background technique

The power transformer is one of the main equipment of the power grid. Its safe and stable operation plays a very important role in the safety of the power system. Due to the electromagnetic induction principle of the transformer, under certain conditions, it will inevitably cause local heating of the transformer. The most common one is the transformer oil tank. The bolts connected to the base are heated, and the long-term overheating of the bolts will cause cracking and damage to the sealant pad. When the ambient temperature changes greatly, it may cause oil leakage of the transformer. If it is seriously overheated, it will also cause accelerated deterioration of the transformer oil, which is safe for the transformer. The operation will cause hidden dangers, so the heat pipe is welded on the transformer box. Before welding the heat pipe, the connecting end of the heat pipe and the transformer box needs to be ground to remove the galvanized layer on the surface, so that the heat pipe and the transformer box need to be polished. The welding operation, so that the transformer can better dissipate heat.

However, the existing heat pipes and transformer boxes have the following problems when grinding and welding: a. The traditional heat pipes and transformer boxes need to be manually held manually during grinding, and then use a grinding machine to dissipate heat. The grinding operation is carried out at the connection between the tube and the transformer box. This method of grinding the heat pipe and the transformer box manually results in excessive labor intensity of workers, long grinding time, and low installation efficiency; b, the existing heat pipe and When welding the transformer box, it is necessary to manually hold the heat pipe and the transformer box, and manually use a welding machine to weld the connection between the heat pipe and the transformer box, so that the connection between the heat pipe and the transformer box is unstable. , reducing its actual positioning accuracy and affecting the heat dissipation function of the transformer.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a method for manufacturing a metal shell of a power transformer, which can solve the above-mentioned problems in grinding and welding of the heat dissipation pipe and the transformer box.

In order to achieve the above purpose, the present invention adopts the following technical solutions to achieve: a method for making and processing a metal shell of a power transformer, characterized in that: it mainly comprises the following steps:

Step 1, overall design, manually carry out overall design work on the power transformer to obtain design drawings;

Step 2, preparatory work, prepare a metal sheet that conforms to the size of the design drawing obtained in step 1;

Step 3, forming treatment, placing the metal plate obtained in step 2 into a stamping die, and processing it into a metal shell conforming to the design drawings;

Step 4: Grinding operation, place the metal shell and heat pipe in step 3 on the shell grinding equipment to grind the connection port of the metal shell and the heat pipe, and manually clean up the grinding debris, and the grinding is completed. the metal shell and heat pipe;

Step 5, welding process, manually use a welding machine to weld the metal shell and the heat pipe obtained in the fourth step to obtain a complete power transformer shell.

The shell grinding equipment used in the above steps includes a bottom plate, a docking device, a positioning device, a telescopic device and a grinding device. The bottom plate is equipped with a docking device, and if the docking device is equipped with a positioning device, the front end of the bottom plate is equipped with a telescopic device. , a grinding device is installed on the telescopic device.

The telescopic device includes a straight plate, a No. 1 cylinder, an L-shaped plate, a No. 2 cylinder, a support plate, a slider, a U-shaped plate, a positioning rod, a straight rod, a long rod, a square and a square plate. It is installed on the outer wall of the front end of the bottom plate, the No. 1 cylinder is installed at the front end of the straight plate, the L-shaped plate is installed on the output end of the No. 1 cylinder, the No. 2 cylinder is installed on the inner wall of the L-shaped plate, and the U-shaped plate is installed on the output end of the No. 2 cylinder. There are chutes on the left and right inner walls, a support plate is installed symmetrically at the rear end of the L-shaped plate, a slider is installed on the outer wall of the support plate, and the slider is installed in the chute by sliding fit. A straight rod is installed symmetrically up and down the pin shaft, one end of the long rod is installed on the straight rod through the pin shaft, the middle end of the long rod is installed with a positioning round rod through a bearing, and the other end of the long rod is installed with a long rod through the pin shaft. The long rods are connected to each other to form an X-shaped telescopic structure. A square slot is opened on the block. The X-shaped telescopic structure is installed with a straight rod through a pin shaft, and the straight rod is installed between the inner walls of the square groove through a pin shaft. There are square plates installed on both ends. Through the cooperation between the No. 2 cylinder, the straight rod and the long rod, the moving distance of the square plate is the same, so that the grinding device can better adapt to the connection distance between the cooling pipe and the transformer box. .

The grinding device includes a motor, a grinding rod, a semi-circular block, a power round roller, an arc panel, a power round rod, a grinding round plate, a sliding round rod and a grinding head. The grinding rod is installed at the center of the square plate for grinding. The rod is provided with a straight groove, the middle end and the outer side of the straight groove are equipped with semi-circular blocks, and the semi-circular blocks are provided with circular grooves. , A sliding round rod is installed in the circular groove of the outer semi-circle block by sliding fit, a grinding circular plate is installed on the sliding circular rod, an arc panel is installed symmetrically at the upper and lower ends of the grinding circular plate, and a power circular rod is installed on the inner wall of the arc panel. The grinding head is installed on the sliding round rod by means of thread engagement, and the power round roller is driven by the motor to rotate, so that the power round roller drives the sliding round rod to perform linear reciprocating motion through the power round rod, so that the grinding head can be used for the cooling pipe and the transformer box. Grinding is performed on the connection between the bodies, so that the heat pipe and the transformer box can be better connected.

The docking device includes a square rod, a clamping round rod, a sliding plate, a No. 3 cylinder, a U-shaped slide plate, a rotating disc, a rotating rod, a No. 4 cylinder and a long strip, and a through groove is formed at the middle end of the bottom plate, A square rod is installed at the middle end of the inner wall of the lower end of the through groove, and a clamping round rod is installed symmetrically on the left and right ends of the outer wall at the left and right ends of the square rod. The upper left and right ends are symmetrically installed with sliding plates by means of sliding fit, and the No. 3 cylinder is installed on the right outer wall of the left sliding plate. A rotating rod is installed on both ends of the rotating disk through a pin shaft, and the other end of the rotating rod is connected to the middle end of the sliding plate through a pin shaft. The slide plate, and the U-shaped slide plate is installed in the slot by sliding fit, the No. 4 cylinder is installed on the upper end of the U-shaped slide plate, and the long strip is installed at the output end of the No. 4 cylinder. The mutual cooperation between the sliding plates can realize the relative movement between the long strips, so that the connection between the transformer box and the heat pipe can be carried out.

The positioning device includes a two-way air cylinder, a positioning plate, a buffer rubber plate, a flat plate, a clamping plate, an insert rod, a No. 5 cylinder and a pressing plate, and the long strip at the right end is provided with a long groove, and the long groove Positioning plates are installed symmetrically at the front and rear ends of the inner and outer ends by sliding fit. A two-way cylinder is installed on the inner wall of the middle end of the long slot. The output end of the two-way cylinder is connected to the positioning plate. The positioning plate is installed with a buffer rubber plate. A flat plate is installed symmetrically up and down at the front and rear ends, and a clamping plate is installed between the upper and lower inner walls of the front plate through a pin shaft. The rear end of the clamping plate is provided with a hollow ring groove. The groove, the inner wall of the groove and the upper and lower ends of the clamping plate are equipped with a No. 5 cylinder, and a clamping plate is installed at the output end of the No. 5 cylinder. The transformer box is clamped through the positioning plate. , The No. 5 cylinder and the abutting plate cooperate with each other, which can better locate the heat pipe and make the connection between the transformer box and the heat pipe more stable.

As a preferred technical solution of the present invention, support rods are evenly installed at the lower end of the bottom plate, so that the casing grinding equipment can stably perform grinding and docking operations on the cooling pipe and the transformer box.

As a preferred technical solution of the present invention, the power round roller is provided with a power groove, the power groove is in the shape of a curved ring, the power round rod extends into the power groove, and the power round rod and the power groove are used in cooperation with each other. , Through the mutual cooperation between the power groove and the power round rod, the sliding round rod and the grinding head can perform reciprocating linear motion.

As a preferred technical solution of the present invention, the grinding head is used in cooperation with the connection between the nozzle of the heat pipe and the transformer, so that the grinding head can better perform the operation between the nozzle of the heat pipe and the connection of the transformer. Grinding work.

As a preferred technical solution of the present invention, the abutment plate is evenly provided with arc-shaped gaps that cooperate with the heat dissipation pipe, so that the abutment plate can more stably position the heat dissipation pipe.

The beneficial effects of the present invention are:

1. The present invention can solve the following problems existing in the grinding and welding of existing cooling pipes and transformer boxes. Use a grinding machine to grind the connection between the heat pipe and the transformer box. This method of grinding the heat pipe and the transformer box manually results in excessive labor intensity, long grinding time, and low installation efficiency; b, now When welding some heat pipes and transformer boxes, it is necessary to manually hold the heat pipes and transformer boxes, and manually use a welding machine to weld the joints of the heat pipes and the transformer boxes, so that the heat pipes and the transformer boxes are welded. The connection between them is unstable, which reduces the actual positioning accuracy and affects the heat dissipation function of the transformer.

2. The telescopic device and the grinding device designed by the present invention can better adjust the distance between the square plates through the cooperation between the No. 2 cylinder, the straight rod and the long rod, so that the grinding device installed on the square plate can It better adapts to the connection distance between the heat pipe and the transformer box. Through the cooperation between the power round roller and the power round rod, the sliding round rod can perform linear reciprocating motion, so that the grinding head can be used for the heat pipe and the transformer box. Grinding the joints between them makes the joints between the heat pipe and the transformer box more evenly ground.

3. The docking device and positioning device designed by the present invention cooperate with each other between the clamping plate, the insertion rod, the No. 5 cylinder and the abutting plate, so that the heat pipe can be positioned better. The mutual cooperation between the rotating rod and the U-shaped slide plate can realize the opposite movement between the long strips, which makes the connection between the transformer box and the cooling pipe more stable, and it is more convenient to manually adjust the connection between the transformer box and the cooling pipe. Welding work in between.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the working flow chart of the present invention;

Fig. 2 is the structural representation of the casing grinding equipment of the present invention;

Fig. 3 is the structural schematic diagram of the docking device of the present invention;

Fig. 4 is the structural representation of the telescopic device of the present invention;

Fig. 5 is the structural schematic diagram of the first angle of view of the positioning device of the present invention;

Fig. 6 is the structural schematic diagram of the second viewing angle of the positioning device of the present invention;

Fig. 7 is the structural representation of the first angle of view of the grinding device of the present invention;

Fig. 8 is the structural representation of the second angle of view of the grinding device of the present invention;

FIG. 9 is a schematic view of the structure of the power round roller of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

As shown in FIG. 1 to FIG. 9, a method for manufacturing and processing a metal shell of a power transformer is characterized in that: it mainly includes the following steps:

Step 1, overall design, manually carry out overall design work on the power transformer to obtain design drawings;

Step 2, preparatory work, prepare a metal sheet that conforms to the size of the design drawing obtained in step 1;

Step 3, forming treatment, placing the metal plate obtained in step 2 into a stamping die, and processing it into a metal shell conforming to the design drawings;

Step 4: Grinding operation, place the metal shell and heat pipe in step 3 on the shell grinding equipment to grind the connection port of the metal shell and the heat pipe, and manually clean up the grinding debris, and the grinding is completed. the metal shell and heat pipe;

Step 5, welding process, manually use a welding machine to weld the metal shell and the heat pipe obtained in the fourth step to obtain a complete power transformer shell.

The shell grinding equipment used in the above steps includes a bottom plate 1, a docking device 2, a positioning device 3, a telescopic device 4 and a grinding device 5. The bottom plate 1 is installed with a docking device 2, and the docking device 2 is installed with a positioning device. 3. A telescopic device 4 is installed at the front end of the bottom plate 1, and a polishing device 5 is installed on the telescopic device 4.

The positioning device 3 includes a two-way air cylinder 31, a positioning plate 32, a buffer rubber plate 33, a flat plate 34, a clamping plate 35, an insert rod 36, a No. 5 cylinder 37 and a clamping plate 38. A long slot is opened on the upper part, and the front and rear ends of the long slot are symmetrically installed with a positioning plate 32 by means of sliding fit. A two-way cylinder 31 is installed on the inner wall of the middle end of the long slot, and the output end of the two-way cylinder 31 is connected to the positioning plate 32. , a buffer rubber plate 33 is installed on the positioning plate 32, a flat plate 34 is installed symmetrically at the front and rear ends of the left long strip 29, and a clamping plate 35 is installed between the upper and lower inner walls of the front plate 34 through a pin, and the rear end of the clamping plate 35 A hollow ring groove is opened, a plug rod 36 is arranged in the hollow ring groove, a groove is formed at the left end of the clamping plate 35, and the inner wall of the groove and the upper and lower ends of the clamping plate 35 are installed with a No. 5 cylinder 37, and the No. 5 cylinder 37 outputs An abutment plate 38 is mounted on the end.

The abutting plate 38 is evenly provided with arc-shaped notches that cooperate with the heat dissipation pipes.

During specific work, manually place the box of the transformer on the right end long plate 29, the two-way cylinder 31 drives the buffer rubber plate 33 on the positioning plate 32 to clamp the transformer box, and place the cooling pipe on the left end long plate 29 Rotate the clamping plate 35 so that the insertion rod 36 is inserted into the hollow ring groove of the clamping plate 35, and the No. 5 cylinder 37 pushes the clamping plate 38 against the inner wall of the heat pipe to clamp and position the heat pipe.

The telescopic device 4 includes a straight plate 411, a No. 1 cylinder 412, an L-shaped plate 413, a No. 2 cylinder 414, a support plate 415, a slider 416, a U-shaped plate 417, a positioning round rod 418, a straight rod 419, and a long rod. 420, block 421 and square plate 422, the straight plate 411 is installed on the outer wall of the front end of the bottom plate 1, the front end of the straight plate 411 is installed with a No. The No. 2 cylinder 414 is installed, the output end of the No. 2 cylinder 414 is installed with a U-shaped plate 417, the left and right inner walls of the U-shaped plate 417 are provided with chute grooves, the rear end of the L-shaped plate 413 is symmetrically installed with a supporting plate 415, and the supporting plate 415 A slider 416 is installed on the outer wall, and the slider 416 is installed in the chute by sliding fit. A straight rod 419 is installed symmetrically up and down through the pin shaft between the inner walls of the support plate 415, and one end of the long rod 420 is installed through the pin shaft. On the straight rod 419, a positioning round rod 418 is installed at the middle end of the long rod 420 through a bearing, and a long rod 420 is installed on the other end of the long rod 420 through a pin, and the long rods 420 are connected to each other to form an X-shaped telescopic structure The square 421 is provided with a square groove, the X-shaped telescopic structure is installed with a straight rod 419 through a pin, the straight rod 419 is installed between the inner walls of the square groove through a pin, and a square plate 422 is installed at the middle end of the long rod 420.

During specific work, after the No. 1 cylinder 412 pushes the L-shaped plate 413 to a suitable position, the No. 2 cylinder 414 pushes the U-shaped plate 417 to the rear end to a suitable position, the U-shaped plate 417 drives the straight rod 419 to rotate, and the straight rod 419 The long rod 420 is driven to rotate, and the long rod 420 drives the square plate 422 to move to a proper position.

The docking device 2 includes a square rod 21, a clamping round rod 22, a sliding plate 23, a No. 3 cylinder 24, a U-shaped slide plate 25, a rotating plate 26, a rotating rod 27, a No. 4 cylinder 28 and a long strip 29. The middle end of the bottom plate 1 is provided with a through groove, the middle end of the inner wall of the lower end of the through groove is provided with a square rod 21, the left and right ends of the square rod 21 are symmetrically installed with a clamping round rod 22 on the left and right sides of the outer wall, and the clamping round rod 22 is another. One end is installed on the inner walls of the left and right ends of the through groove, and the left and right ends of the clamping round rod 22 are symmetrically installed with sliding plates 23 by means of sliding fit. The output end is connected to the outer wall of the left end of the square rod 21, the middle end of the square rod 21 is installed with a rotating plate 26 through a pin shaft, the two ends of the rotating plate 26 are installed with a rotating rod 27 through a pin shaft, and the other end of the rotating rod 27 is connected to the sliding plate through a pin shaft. At the middle end of the plate 23, a card slot is formed between the outer wall of the upper end of the bottom plate 1 and the inner wall of the lower end of the through groove. A U-shaped slide plate 25 is installed on the sliding plate 23, and the U-shaped slide plate 25 is installed in the card slot by sliding fit. A No. 4 cylinder 28 is installed on the upper end of the sliding plate 25, and a long strip 29 is installed at the output end of the No. 4 cylinder 28.

During specific operation, the No. 3 cylinder 24 drives the sliding plate 23 at the left end to move to the middle, the sliding plate 23 drives the rotating plate 26 to rotate through the rotating rod 27, and the rotating plate 26 drives the sliding plate 23 at the right end to move to the middle through the rotating rod 27. After 23 drives the U-shaped slide plate 25 to move to the middle to the proper position, the No. 4 cylinder 28 drives the long strip 29 to move to the proper position.

The grinding device 5 includes a motor 51, a grinding rod 52, a semicircular block 53, a power round roller 54, an arc panel 55, a power round rod 56, a grinding round plate 57, a sliding round rod 58 and a grinding head 59. The grinding The rod 52 is installed at the center position of the square plate 422, the grinding rod 52 is provided with a straight groove, the middle end and the outer side of the straight groove are installed with a semi-circular block 53, the semi-circular block 53 is provided with a circular groove, and the motor 51 is installed on the square plate 422. Located in the straight groove, the output end of the motor 51 is installed with a power round roller 54 through the circular groove, the outer semi-circular block 53 is fitted with a sliding round rod 58 in the circular groove by sliding fit, and a grinding circular plate 57 is installed on the sliding round rod 58 The upper and lower ends of the polishing circular plate 57 are symmetrically installed with arc panels 55, the inner wall of the arc panel 55 is equipped with a power rod 56, and the sliding rod 58 is installed with a grinding head 59 through thread engagement.

The grinding head 59 is used in cooperation with the connection between the nozzle of the cooling pipe and the transformer.

The power round roller 54 is provided with a power groove, the power groove is in the shape of a curved ring, the power round rod 56 extends into the power groove, and the power round rod 56 and the power groove are used in cooperation with each other.

During specific operation, the motor 51 drives the power round roller 54 to rotate, the power round roller 54 drives the power round rod 56 to slide, the power round rod 56 drives the arc panel 55 to slide, the arc panel 55 drives the sliding rod 58 to slide, and the sliding rod 58 drives the grinding The head 59 performs linear reciprocating motion to grind the transformer box and the heat pipe.

After the grinding is completed, the transformer box and the grinding part of the heat pipe are cleaned manually. The No. 3 cylinder 24 drives the sliding plate 23 at the left end to move to the middle. The sliding plate 23 drives the rotating plate 26 to rotate through the rotating rod 27. The rod 27 drives the sliding plate 23 at the right end to move to the middle. After the sliding plate 23 drives the U-shaped sliding plate 25 to move to the middle to a suitable position, the No. 4 cylinder 28 drives the transformer box and the cooling pipe on the long plate 29 to move to the appropriate position. Weld the transformer box and heat pipe manually.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention will also There are various changes and modifications which fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A manufacturing and processing method of a metal shell of a power transformer is characterized by comprising the following steps: the method mainly comprises the following steps:

step one, integral design, namely manually carrying out integral design work on a power transformer to obtain a design drawing;

step two, preparing work, namely preparing a metal plate which meets the size of the design drawing obtained in the step one;

step three, molding treatment, namely placing the metal plate obtained in the step two into a stamping die, and processing the metal plate into a metal shell which meets the design drawing;

step four, polishing operation, namely placing the metal shell and the radiating pipe in the step three on shell polishing equipment to polish the connecting ports of the metal shell and the radiating pipe, and manually cleaning polished scraps to obtain the polished metal shell and the polished radiating pipe;

step five, welding, namely manually welding the metal shell and the radiating pipe obtained in the step four by using a welding machine to obtain a complete power transformer shell;

the shell polishing equipment used in the steps comprises a bottom plate (1), a butt joint device (2), a positioning device (3), a telescopic device (4) and a polishing device (5), wherein the butt joint device (2) is installed on the bottom plate (1), the positioning device (3) is installed on the butt joint device (2), the telescopic device (4) is installed at the front end of the bottom plate (1), and the polishing device (5) is installed on the telescopic device (4);

the telescopic device (4) comprises a straight plate (411), a first cylinder (412), an L-shaped plate (413), a second cylinder (414), a supporting plate (415), a sliding block (416), a U-shaped plate (417), a positioning round rod (418), a straight rod (419), a long rod (420), a square block (421) and a square plate (422), wherein the straight plate (411) is installed on the outer wall of the front end of the bottom plate (1), the first cylinder (412) is installed at the front end of the straight plate (411), the L-shaped plate (413) is installed at the output end of the first cylinder (412), the second cylinder (414) is installed on the inner wall of the L-shaped plate (413), the U-shaped plate (417) is installed at the output end of the second cylinder (414), sliding grooves are formed in the left and right inner walls of the U-shaped plate (417), the supporting plate (415) is installed at the left and right sides of the rear end of the L-shaped plate (413), the sliding block, straight rods (419) are symmetrically arranged on the upper portion and the lower portion of the inner wall of the supporting plate (415) through pin shafts, one end of each long rod (420) is arranged on the corresponding straight rod (419) through the pin shaft, a positioning round rod (418) is arranged at the middle end of each long rod (420) through a bearing, the other end of each long rod (420) is provided with each long rod (420) through the pin shaft, the long rods (420) are mutually connected to form an X-shaped telescopic structure, square grooves are formed in the square blocks (421), the straight rods (419) are arranged on the X-shaped telescopic structures through the pin shafts, the straight rods (419) are arranged between the inner walls of the square grooves through the pin shafts, and square plates;

the polishing device (5) comprises a motor (51), a polishing rod (52), a semicircular block (53), a power circular roller (54), an arc panel (55), a power circular rod (56), a polishing circular plate (57), a sliding circular rod (58) and a polishing head (59), wherein the polishing rod (52) is arranged at the central position of a square plate (422), a straight groove is formed in the polishing rod (52), the semicircular block (53) is arranged at the middle end and the outer side of the straight groove, a circular groove is formed in the semicircular block (53), the motor (51) is arranged on the square plate (422) and positioned in the straight groove, the power circular roller (54) is arranged at the output end of the motor (51) by penetrating through the circular groove, the sliding circular rod (58) is arranged in the circular groove of the outer semicircular block (53) in a sliding fit manner, the circular plate (57) is arranged on the sliding circular rod (58), the arc panel (55) is symmetrically arranged at the upper end and the lower end of the polishing circular plate (57, the inner wall of the cambered plate (55) is provided with a power round rod (56), and the sliding round rod (58) is provided with a polishing head (59) in a threaded engagement mode.

2. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 1, wherein the manufacturing method comprises the following steps: the butt joint device (2) comprises a square rod (21), a clamping round rod (22), a sliding plate (23), a third air cylinder (24), a U-shaped sliding plate (25), a rotating disc (26), a rotating rod (27), a fourth air cylinder (28) and a long slat (29), wherein a through groove is formed in the middle end of the bottom plate (1), the square rod (21) is installed at the middle end of the inner wall of the lower end of the through groove, the clamping round rods (22) are symmetrically installed at the front end and the rear end of the outer wall of the left end and the right end of the square rod (21), the other ends of the clamping round rods (22) are installed on the inner walls of the left end and the right end of the through groove, the sliding plate (23) is symmetrically installed at the left end and the right end of the clamping round rod (22) in a sliding fit mode, the third air cylinder (24) is installed on the outer wall of the right side of the left end sliding plate (, dwang (27) are installed through the round pin axle at rolling disc (26) both ends, dwang (27) other end is through round pin hub connection in sliding plate (23) middle-end, the draw-in groove has been seted up between bottom plate (1) upper end outer wall and the logical groove lower extreme inner wall, install U type slide (25) on sliding plate (23), and U type slide (25) are installed in the draw-in groove through sliding fit's mode, No. four cylinder (28) are installed to U type slide (25) upper end, rectangular board (29) are installed to No. four cylinder (28) outputs.

3. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 1, wherein the manufacturing method comprises the following steps: the positioning device (3) comprises a bidirectional cylinder (31), a positioning plate (32), a buffer rubber plate (33), a flat plate (34), a clamping plate (35), an inserted bar (36), a fifth cylinder (37) and a support plate (38), wherein a strip groove is formed in the right-end strip plate (29), the positioning plate (32) is symmetrically arranged at the front end and the rear end in the strip groove in a sliding fit mode, the bidirectional cylinder (31) is arranged on the inner wall of the middle end of the strip groove, the output end of the bidirectional cylinder (31) is connected to the positioning plate (32), the buffer rubber plate (33) is arranged on the positioning plate (32), the flat plate (34) is symmetrically arranged at the front end and the rear end of the left-end strip plate (29) in a vertical mode, the clamping plate (35) is arranged between the upper inner wall and the lower inner wall of the front-end flat plate (34) through a pin shaft, the left end of the clamping plate (35) is provided with a groove, the upper end and the lower end of the inner wall of the groove and the clamping plate (35) are both provided with a fifth cylinder (37), and the output end of the fifth cylinder (37) is provided with a abutting plate (38).

4. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 1, wherein the manufacturing method comprises the following steps: the lower end of the bottom plate (1) is uniformly provided with a support rod (11).

5. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 1, wherein the manufacturing method comprises the following steps: the power circular roller (54) is provided with a power groove, the power groove is in a curved annular shape, the power circular rod (56) extends into the power groove, and the power circular rod (56) and the power groove are mutually matched for use.

6. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 1, wherein the manufacturing method comprises the following steps: the polishing head (59) and the joint of the heat radiation pipe orifice and the transformer are mutually matched for use.

7. The manufacturing and processing method of the metal shell of the power transformer as claimed in claim 3, wherein the manufacturing method comprises the following steps: arc-shaped notches matched with the radiating pipe are uniformly arranged on the abutting plate (38).

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