CN113523716B - Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator - Google Patents
Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator Download PDFInfo
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- CN113523716B CN113523716B CN202110692730.2A CN202110692730A CN113523716B CN 113523716 B CN113523716 B CN 113523716B CN 202110692730 A CN202110692730 A CN 202110692730A CN 113523716 B CN113523716 B CN 113523716B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The invention discloses a cold rolling device for a main pipe and a branch pipe of a stainless steel water separator, which comprises a base, wherein a plurality of through holes are vertically formed in the base, the through holes penetrate through the upper end surface and the lower end surface of the base, a telescopic driving device is arranged below the through holes, a pull rod is connected to the telescopic driving device, and the pull rod penetrates through the through holes; the flaring die head can be detachably connected with the upper end of the pull rod, and an outer chamfer surface is arranged on the side surface of the flaring die head. The cold-rolling flaring device is used for cold-rolling flaring of the branch pipe before welding the branch pipe and the main pipe, so that the main pipe and the branch pipe can be firmly and tightly matched before welding, and the phenomena of insufficient welding and false welding between the main pipe and the branch pipe are effectively avoided.
Description
Technical Field
The invention relates to the technical field of water separator manufacturing, in particular to a cold rolling device and a cold rolling welding method for a main pipe and a branch pipe of a stainless steel water separator.
Background
The floor heating water separator is an important component of floor heating equipment, is a device used for supplying water and collecting backwater in a floor heating system, and is commonly called as a water separator in the technical field of floor heating.
The existing water separator comprises a main pipe and a plurality of branch pipes connected to the main pipe, the main pipe and the branch pipes are made of stainless steel, and the branch pipes are connected with the branch pipes in a welding mode. As shown in the attached drawings 1 to 2, before the branch pipes are welded to the main pipe, a plurality of connecting holes 2 are punched on the main pipe 1 through a punching device; and then processing the connecting hole into a drawing hole by a drawing machine, and then leveling the end face of the drawing hole. As shown in fig. 3, the upper end of the branch pipe 5 is provided with an annular boss 6, and a positioning end surface 7 is formed between the annular boss 6 and the branch pipe 5. Before welding, the branch pipe 5 is preassembled on the main pipe 1, when the branch pipe is preassembled, the annular boss on the branch pipe 5 is inserted into the pull hole, the end face of the pull hole is attached to the positioning end face on the branch pipe, and then the joint of the main pipe and the branch pipe is welded, so that the main pipe and the branch pipe are fixedly connected together.
The traditional welding process often causes the phenomena of insufficient welding and false welding between the main pipe and the branch pipe because the main pipe and the branch pipe are not tightly matched before welding or the main pipe and the branch pipe move relatively in the welding process, and the welding quality between the main pipe and the branch pipe is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems that in the existing water separator, the welding quality between a main pipe and a branch pipe of the stainless steel water separator is seriously affected due to the phenomena of insufficient welding and false welding between the main pipe and the branch pipe caused by the fact that the main pipe and the branch pipe are not tightly matched before welding or the main pipe and the branch pipe move relatively in the welding process.
The purpose of the invention is realized by the following technical scheme: a cold rolling device for a main pipe and a branch pipe of a stainless steel water separator comprises a base, wherein a plurality of through holes are vertically formed in the base, the through holes penetrate through the upper end surface and the lower end surface of the base, a telescopic driving device is arranged below the through holes, a pull rod is connected to the telescopic driving device, and the pull rod penetrates through the through holes; the flaring die head can be detachably connected with the upper end of the pull rod, and an outer chamfering surface is arranged on the side surface of the flaring die head.
The cold-rolling flaring device is used for cold-rolling flaring of the branch pipe before welding the branch pipe and the main pipe, so that the main pipe and the branch pipe can be firmly and tightly matched before welding, and the phenomena of insufficient welding and false welding between the main pipe and the branch pipe are effectively avoided. When the pipe fitting device is used, the branch pipe is preassembled on the main pipe, the annular boss on the branch pipe is inserted into the pull hole, and the end face of the pull hole is attached to the positioning end face on the branch pipe; then the main pipe and the branch pipe are placed on the base, the lower end face of the branch pipe is in contact with the upper end face of the base, and the pull rod is positioned in the branch pipe; inserting the flaring die head into the upper end of the branch pipe, extending the part below the outer chamfer surface on the flaring die head into the branch pipe, and simultaneously enabling the pull rod to be opposite to the insertion hole on the sliding block; the telescopic driving device drives the pull rod to rise, and after the upper end of the pull rod extends into the jack in the sliding block, the upper end of the pull rod is connected with the sliding block; after the pull rod links to each other with the sliding block, flexible drive arrangement drive pull rod one section distance of lapse, the flaring die head lapse under the pulling of pull rod, carry out cold rolling flaring through the outer chamfer that sets up in flaring die head side to the upper end of branch pipe, after the cold rolling flaring, the lateral surface of the cyclic annular boss of branch pipe upper end closely laminates with the downthehole cambered surface of pulling out in the hole, make and realize firm and inseparable cooperation between branch pipe and the person in charge, effectively avoided being responsible for and the branch pipe takes place the rosin joint when the welding, the phenomenon of pseudo-soldering, welding quality has been guaranteed.
Preferably, the telescopic driving device is a hydraulic cylinder.
Preferably, the telescopic driving device is a cylinder.
Preferably, a guide hole is vertically arranged in the flaring die head, a sliding block capable of moving along the axial direction of the guide hole is connected in the guide hole, and a check ring is arranged at the lower end of the guide hole; a jack used for connecting a pull rod is vertically arranged in the sliding block, a first piston hole is transversely arranged on one side of the jack, a first piston is arranged in the first piston hole, a first oil cavity is formed between the first piston and the bottom of the first piston hole, a first return spring is arranged between the first piston and the bottom of the first piston hole, and a guide block is arranged on one side, facing the guide hole, of the first piston; the upper end of the pull rod is transversely provided with a sliding hole corresponding to the first piston hole, one end of the sliding hole, far away from the first piston hole, is provided with a motor mounting hole, a motor is arranged in the motor mounting hole, a sliding rod is connected in the sliding hole in a sliding manner, the sliding rod is provided with a threaded hole, the motor is connected with a screw rod, and the screw rod is in threaded connection with the threaded hole; a second piston hole is vertically formed in the upper end of the jack, a second piston is connected in the second piston hole, the lower end of the second piston is connected with a telescopic rod, a pressing plate is arranged at the lower end of the telescopic rod and located in the jack, and an energy storage spring is connected at the lower end of the pressing plate; a second oil cavity is formed between the second piston and the upper end of the second piston hole, and a second return spring is arranged between the second piston and the upper end of the second piston hole and is a tension spring; the first oil chamber is connected with the second oil chamber through a connecting pipe; hydraulic oil is filled in the first oil cavity and the second oil cavity; the connecting pipe is provided with a bidirectional flow control device. When the upper end of the pull rod extends into the jack, the pull rod rises to a position where the slide rod is opposite to the guide block and stops, then the motor drives the screw rod to rotate towards one direction, the slide rod extends into the first piston hole under the drive of the motor, and when the slide rod extends into the first piston hole, the connection between the flaring die head and the pull rod is realized; meanwhile, the sliding rod pushes the first piston to move towards the bottom of the first piston hole, and the motor stops after the first piston is pushed to move for a certain distance; the hydraulic oil in the first oil cavity enters the second oil cavity through the connecting pipe, the second piston and the telescopic rod are pushed to move downwards for a certain distance, and then the energy storage spring is driven to move downwards; after welding is finished, the motor drives the screw rod to rotate towards the other direction, so that the sliding rod exits from the first piston hole and returns to the initial position, after the sliding rod exits from the first piston hole, the pull rod is disconnected with the flaring die head, the energy storage spring releases energy, and the sliding block bounces upwards under the action of the energy storage spring and impacts the upper end of the guide hole. Because the flaring die head carries out cold rolling flaring to the branch pipe upper end after, can produce tighter cooperation between flaring die head and the branch pipe for the flaring die head is difficult for taking off from the branch pipe. According to the invention, the sliding block bounces upwards under the action of the energy storage spring and impacts the upper end of the guide hole to generate an upward impact force on the flaring die head, so that the flaring die head is pulled out of the branch pipe.
Preferably, the bidirectional flow control device comprises a shell, the connecting pipe is disconnected at the shell and is divided into a first pipe body and a second pipe body, two ends of the first pipe body are respectively connected with the first oil cavity and the shell, and two ends of the second pipe body are respectively connected with the second oil cavity and the shell; the first pipe body and the second pipe body are respectively connected to two ends of the shell; a partition board is arranged in the shell and divides the shell into two chambers, and the first pipe body and the second pipe body are respectively communicated with the two chambers; the partition board is provided with a small flow hole and a large flow hole, one end of the large flow hole close to the second pipe body is provided with a valve ball, the shell is internally provided with an elastic pressing sheet, and the valve ball is pressed at one end of the large flow hole through the elastic pressing sheet. When the hydraulic oil flows into the second oil chamber from the first oil chamber through the connecting pipe, the large flow hole and the lower flow hole are both in a conduction state, and the throughput of the liquid in unit time is larger, so that the hydraulic oil in the first oil chamber can enter the second oil chamber at a higher speed; when the sliding rod exits from the first piston hole and returns to the initial position, the first piston and the second piston both move to the initial position under the action of the first return spring and the second return spring, so that hydraulic oil in the second oil cavity flows back to the first oil cavity through the connecting pipe, the large-flow hole is in a closed cut-off state at the moment, the hydraulic oil can only flow back to the first oil cavity through the small-flow hole, the backflow speed is low, the second piston and the telescopic rod can reset at a low speed, and therefore the energy storage spring cannot rebound greatly before releasing energy and bouncing up the sliding block, and the energy storage spring is guaranteed not to have large energy loss before releasing energy.
Preferably, the slide bar and the slide hole are rectangular in cross section.
A cold rolling welding method for a main pipe and a branch pipe of a stainless steel water separator comprises the following specific steps:
1) processing a connecting hole on the main pipe through a punching device, processing the connecting hole into a pull hole through a hole pulling machine, and flattening the end face of the pull hole;
2) preassembling the branch pipe on the main pipe, inserting the annular boss on the branch pipe into the pull hole, and attaching the end face of the pull hole to the positioning end face on the branch pipe;
3) placing the main pipe and the branch pipe on a base, wherein the lower end face of the branch pipe is in contact with the upper end face of the base, and the pull rod is positioned in the branch pipe; inserting the flaring die head into the upper end of the branch pipe, extending the part below the outer chamfer surface on the flaring die head into the branch pipe, and simultaneously enabling the pull rod to be opposite to the insertion hole on the sliding block;
4) the telescopic driving device drives the pull rod to ascend, the pull rod stops after ascending to the position where the slide rod is opposite to the guide block, then the motor drives the screw rod to rotate towards one direction, the slide rod extends into the first piston hole under the driving of the motor and pushes the first piston to move towards the bottom of the first piston hole, and the motor stops after pushing the first piston to move for a certain distance; the hydraulic oil in the first oil cavity enters the second oil cavity through the connecting pipe, the second piston and the telescopic rod are pushed to move downwards for a certain distance, and then the energy storage spring is driven to move downwards;
5) the telescopic driving device drives the pull rod to move downwards for a certain distance, the flaring die head moves downwards under the pulling of the pull rod, the cold rolling flaring is carried out on the upper end of the branch pipe through an outer chamfer surface arranged on the side surface of the flaring die head, and after the cold rolling flaring is carried out, an annular boss at the upper end of the branch pipe is tightly attached to the inner arc surface of the drawing hole in the drawing hole;
6) welding the joint of the main pipe and the branch pipe;
7) the motor drives the screw rod to rotate towards the other direction, so that the sliding rod is withdrawn from the first piston hole and returns to the initial position, after the sliding rod is withdrawn from the first piston hole, the energy storage spring releases energy, the sliding block bounces upwards under the action of the energy storage spring and impacts the upper end of the guide hole to generate an upward impact force on the flaring die head, and the flaring die head is conveniently pulled out of the branch pipe.
The invention has the beneficial effects that: the cold-rolling flaring device is used for cold-rolling flaring of the branch pipe before welding the branch pipe and the main pipe, so that the main pipe and the branch pipe can be firmly and tightly matched before welding, and the phenomena of insufficient welding and false welding between the main pipe and the branch pipe are effectively avoided.
Drawings
FIG. 1 is a schematic view of a main pipe before hole drawing.
Fig. 2 is a schematic view of the main pipe after hole drawing.
Fig. 3 is a schematic structural view of the branch pipe.
FIG. 4 is a schematic structural view of a cold rolling apparatus.
Fig. 5 is an enlarged view of a portion a in fig. 4.
Fig. 6 is an enlarged view of a portion B in fig. 5.
Fig. 7 is a schematic structural diagram of the profile of the flaring die.
Fig. 8 is an enlarged view of a portion D in fig. 6.
In the figure: 1. the hydraulic pressure-accumulating type hydraulic pressure-accumulating hydraulic cylinder comprises a main pipe, 2, a connecting hole, 3, an inner arc surface of a drawing hole, 4, an end face of the drawing hole, 5, a branch pipe, 6, an annular boss, 7, a positioning end face, 8, a flaring die head, 9, a base, 10, a telescopic driving device, 11, a pull rod, 12, a guide hole, 13, a sliding block, 14, a retainer ring, 15, a sliding hole, 16, a sliding rod, 17, a motor, 18, a screw rod, 19, a first piston, 20, a guide block, 21, a first oil cavity, 22, a first return spring, 23, a second piston, 24, a telescopic rod, 25, a pressure plate, 26, a second oil cavity, 27, a second return spring, 28, a connecting pipe, 29, an energy-accumulating spring, 30, a jack, 31, an outer chamfer face, 32, a shell, 33, a partition plate, 34, a small flow hole, 35, a large flow hole, 36, a valve ball, 37 and an elastic pressure sheet.
Detailed Description
The invention is further described by the following detailed description in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 4 to 8, the cold rolling device for the main pipe and the branch pipe of the stainless steel water separator comprises a base 1 and a flaring die head 8. The base 1 has a rectangular parallelepiped structure. A plurality of through holes are vertically formed in the base 1 and penetrate through the upper end face and the lower end face of the base 1. The through holes are arranged in a straight line. A telescopic driving device 10 is arranged below the through hole. In the present invention, the telescopic driving device 10 is a hydraulic cylinder. The telescopic driving device 10 is connected with a pull rod 11, and the pull rod 11 penetrates through the through hole.
The side of the flaring die head 8 is provided with an external chamfer surface 31. A guide hole 12 is vertically arranged in the flaring die head 8, and a sliding block 13 which can move along the axial direction of the guide hole 12 is connected in the guide hole 12. The lower end of the guide hole 12 is provided with a retainer ring 14. Retainer ring 14 is used to limit slider 12. Sliding block 12 is vertically provided with insertion hole 30 for connecting pull rod 11, and the lower end of insertion hole 30 is open. A first piston hole is transversely formed in one side of the insertion hole 30, a first piston 19 is arranged in the first piston hole, a first oil chamber 21 is formed between the first piston 19 and the bottom of the first piston hole, and a first return spring 22 is arranged between the first piston 19 and the bottom of the first piston hole. The first piston 19 is provided with a guide block 20 on the side facing the guide hole 12, the guide block 20 being slidably connected in the first piston hole. The upper end of the pull rod 11 is transversely provided with a sliding hole 15 corresponding to the first piston hole, one end of the sliding hole 15 far away from the first piston hole is provided with a motor mounting hole, and a motor 17 is arranged in the motor mounting hole. A sliding rod 16 is connected in the sliding hole 15 in a sliding mode, a threaded hole is formed in the sliding rod 16, a screw 18 is connected to the motor 17, and the screw 18 is connected in the threaded hole in a threaded mode. The slide bar 16 and the slide hole 15 are rectangular in cross section. The upper end of jack is vertical to be provided with the second piston hole, is connected with second piston 23 in the second piston hole, and the lower extreme of second piston 23 is connected with telescopic link 24, and the lower extreme of telescopic link 24 is provided with clamp plate 25, and clamp plate 25 is located jack 30, and the lower extreme of clamp plate 25 is connected with energy storage spring 29. A second oil chamber 26 is formed between the second piston 23 and the upper end of the second piston hole, a second return spring 27 is arranged between the second piston and the upper end of the second piston hole, and the second return spring 27 is a tension spring. The first oil chamber 21 and the second oil chamber 26 are connected by a connecting pipe 28. The first oil chamber 21 and the second oil chamber 26 are filled with hydraulic oil. The connecting tube 28 is provided with a bi-directional flow control device.
The bidirectional flow control device includes a housing 32, the connecting pipe 28 is disconnected at the housing 32 and divided into a first pipe and a second pipe, both ends of the first pipe are connected to the first oil chamber 21 and the housing 32, respectively, and both ends of the second pipe are connected to the second oil chamber 26 and the housing 32, respectively. The first pipe body and the second pipe body are respectively connected to two ends of the shell. A partition 33 is arranged in the shell 32, the partition 33 divides the interior of the shell 32 into two chambers, and the first pipe body and the second pipe body are respectively communicated with the two chambers. The partition 33 is provided with a small flow hole 35 and a large flow hole 34, a valve ball 36 is provided at one end of the large flow hole 35 near the second tube, and an elastic pressing piece 37 is provided in the case 32, and the valve ball 36 is pressed against one end of the large flow hole 35 by the elastic pressing piece 37.
A cold rolling welding method for a main pipe and a branch pipe of a stainless steel water separator comprises the following specific steps:
1) and processing a connecting hole on the main pipe through a punching device, processing the connecting hole into a pull hole through a pull hole machine, and flattening the end face of the pull hole.
2) The branch pipe is preassembled on the main pipe, the annular boss on the branch pipe is inserted into the pulling hole, and the end face of the pulling hole is attached to the positioning end face on the branch pipe.
3) Placing the main pipe and the branch pipe on a base, wherein the lower end face of the branch pipe is in contact with the upper end face of the base, and the pull rod is positioned in the branch pipe; and inserting the flaring die head into the upper end of the branch pipe, extending the part below the outer chamfer surface on the flaring die head into the branch pipe, and simultaneously enabling the pull rod to be opposite to the insertion hole on the sliding block.
4) The telescopic driving device drives the pull rod to ascend, the pull rod stops after ascending to the position where the slide rod is opposite to the guide block, then the motor drives the screw rod to rotate towards one direction, the slide rod extends into the first piston hole under the driving of the motor and pushes the first piston to move towards the bottom of the first piston hole, and the motor stops after pushing the first piston to move for a certain distance; the hydraulic oil in the first oil cavity enters the second oil cavity through the connecting pipe, the second piston and the telescopic rod are pushed to move downwards for a certain distance, and then the energy storage spring is driven to move downwards.
5) The telescopic driving device drives the pull rod to move downwards for a certain distance, the flaring die head moves downwards under the pulling of the pull rod, the cold rolling flaring is carried out on the upper end of the branch pipe through the outer chamfer surface arranged on the side surface of the flaring die head, and after the cold rolling flaring is carried out, the annular boss at the upper end of the branch pipe is tightly attached to the inner arc surface 4 of the drawing hole in the drawing hole.
6) And welding the joint of the main pipe and the branch pipe.
7) The motor drives the screw rod to rotate towards the other direction, so that the sliding rod is withdrawn from the first piston hole and returns to the initial position, after the sliding rod is withdrawn from the first piston hole, the energy storage spring releases energy, the sliding block bounces upwards under the action of the energy storage spring and impacts the upper end of the guide hole to generate an upward impact force on the flaring die head, and the flaring die head is conveniently pulled out of the branch pipe.
Example 2:
example 2 differs from example 1 in that: in example 2, the main pipe of the water knockout drum and the cold rolling device for the branch pipe, the telescopic driving device is a cylinder, and the rest of the structure is the same as that of example 1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A cold rolling device for a main pipe and a branch pipe of a stainless steel water separator is characterized by comprising a base, wherein a plurality of through holes are vertically formed in the base, the through holes penetrate through the upper end surface and the lower end surface of the base, a telescopic driving device is arranged below the through holes, a pull rod is connected to the telescopic driving device, and the pull rod penetrates through the through holes; the flaring die head is detachably connected with the upper end of the pull rod, an outer chamfer surface is arranged on the side surface of the flaring die head, a guide hole is vertically arranged in the flaring die head, a sliding block capable of moving along the axial direction of the guide hole is connected in the guide hole, and a check ring is arranged at the lower end of the guide hole; a jack used for connecting a pull rod is vertically arranged in the sliding block, a first piston hole is transversely arranged on one side of the jack, a first piston is arranged in the first piston hole, a first oil cavity is formed between the first piston and the bottom of the first piston hole, a first return spring is arranged between the first piston and the bottom of the first piston hole, and a guide block is arranged on one side, facing the guide hole, of the first piston; the upper end of the pull rod is transversely provided with a sliding hole corresponding to the first piston hole, one end of the sliding hole, far away from the first piston hole, is provided with a motor mounting hole, a motor is arranged in the motor mounting hole, a sliding rod is connected in the sliding hole in a sliding manner, the sliding rod is provided with a threaded hole, the motor is connected with a screw rod, and the screw rod is in threaded connection with the threaded hole; a second piston hole is vertically formed in the upper end of the jack, a second piston is connected in the second piston hole, the lower end of the second piston is connected with a telescopic rod, a pressing plate is arranged at the lower end of the telescopic rod and located in the jack, and an energy storage spring is connected at the lower end of the pressing plate; a second oil cavity is formed between the second piston and the upper end of the second piston hole, and a second return spring is arranged between the second piston and the upper end of the second piston hole and is a tension spring; the first oil chamber and the second oil chamber are connected through a connecting pipe; hydraulic oil is filled in the first oil cavity and the second oil cavity; the connecting pipe is provided with a bidirectional flow control device.
2. The cold rolling device for the main pipe and the branch pipe of the stainless steel water separator according to claim 1, wherein the telescopic driving device is a hydraulic cylinder.
3. The cold rolling device for the main pipe and the branch pipe of the stainless steel water separator according to claim 1, wherein the telescopic driving device is a cylinder.
4. The cold rolling device for the main pipe and the branch pipe of the stainless steel water separator as claimed in claim 1, wherein the bidirectional flow control device comprises a shell, the connecting pipe is disconnected at the shell and is divided into a first pipe body and a second pipe body, two ends of the first pipe body are respectively connected with the first oil cavity and the shell, and two ends of the second pipe body are respectively connected with the second oil cavity and the shell; the first pipe body and the second pipe body are respectively connected to two ends of the shell; a partition board is arranged in the shell and divides the shell into two chambers, and the first pipe body and the second pipe body are respectively communicated with the two chambers; the baffle plate is provided with a small flow hole and a large flow hole, one end of the large flow hole, which is close to the second pipe body, is provided with a valve ball, and the shell is internally provided with an elastic pressing sheet which presses the valve ball at one end of the large flow hole.
5. The cold rolling device for the main pipe and the branch pipe of the stainless steel water separator according to claim 1, wherein the cross sections of the sliding rod and the sliding hole are rectangular.
6. A cold rolling welding method for a main pipe and a branch pipe of a stainless steel water knockout drum by applying the cold rolling device for the main pipe and the branch pipe of the stainless steel water knockout drum as claimed in any one of claims 1 to 5, is characterized by comprising the following specific steps:
1) processing a connecting hole on the main pipe through a punching device, processing the connecting hole into a pull hole through a hole pulling machine, and flattening the end face of the pull hole;
2) preassembling the branch pipe on the main pipe, inserting the annular boss on the branch pipe into the pull hole, and attaching the end face of the pull hole to the positioning end face on the branch pipe;
3) placing the main pipe and the branch pipe on a base, wherein the lower end face of the branch pipe is in contact with the upper end face of the base, and the pull rod is positioned in the branch pipe; inserting the flaring die head into the upper end of the branch pipe, extending the part below the outer chamfer surface on the flaring die head into the branch pipe, and simultaneously enabling the pull rod to be opposite to the insertion hole on the sliding block;
4) the telescopic driving device drives the pull rod to ascend, the pull rod stops after ascending to the position where the slide rod is opposite to the guide block, then the motor drives the screw rod to rotate towards one direction, the slide rod extends into the first piston hole under the driving of the motor and pushes the first piston to move towards the bottom of the first piston hole, and the motor stops after pushing the first piston to move for a certain distance; the hydraulic oil in the first oil cavity enters the second oil cavity through the connecting pipe, the second piston and the telescopic rod are pushed to move downwards for a certain distance, and then the energy storage spring is driven to move downwards;
5) the telescopic driving device drives the pull rod to move downwards for a certain distance, the flaring die head moves downwards under the pulling of the pull rod, the cold rolling flaring is carried out on the upper end of the branch pipe through an outer chamfer surface arranged on the side surface of the flaring die head, and after the cold rolling flaring is carried out, an annular boss at the upper end of the branch pipe is tightly attached to the inner arc surface of the drawing hole in the drawing hole;
6) welding the joint of the main pipe and the branch pipe;
7) the motor drives the screw rod to rotate towards the other direction, so that the sliding rod is withdrawn from the first piston hole and returns to the initial position, after the sliding rod is withdrawn from the first piston hole, the energy storage spring releases energy, the sliding block bounces upwards under the action of the energy storage spring and impacts the upper end of the guide hole to generate an upward impact force on the flaring die head, and the flaring die head is conveniently pulled out of the branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692730.2A CN113523716B (en) | 2021-06-22 | 2021-06-22 | Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692730.2A CN113523716B (en) | 2021-06-22 | 2021-06-22 | Cold rolling device and cold rolling welding method for main pipe and branch pipe of stainless steel water separator |
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| CN113523716A CN113523716A (en) | 2021-10-22 |
| CN113523716B true CN113523716B (en) | 2022-06-17 |
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