CN111843398B - Low-cost U-shaped pipe welding method for gas-liquid separator - Google Patents
Low-cost U-shaped pipe welding method for gas-liquid separator Download PDFInfo
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- CN111843398B CN111843398B CN202010792026.XA CN202010792026A CN111843398B CN 111843398 B CN111843398 B CN 111843398B CN 202010792026 A CN202010792026 A CN 202010792026A CN 111843398 B CN111843398 B CN 111843398B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a low-cost welding method of a U-shaped pipe for a gas-liquid separator, which comprises the following steps: a. processing a steel pipe; b. mounting a copper pipe clamping device on a rotary workbench; c. mounting the plugging device on top of the mounting bracket; d. mounting and bidirectionally clamping a copper pipe; e. plugging and shaping the copper pipe; f. carrying out ink jet marking on the outer surface of the copper pipe; g. the copper pipe is fixedly connected with the steel pipe; h. and d, repeating the step d to the step g, and processing in batches to obtain the U-shaped pipes. The invention adopts the structure that the lower end is a steel pipe and the upper end is a copper pipe, thus reducing the cost of the U-shaped pipe. The invention can keep the steel pipe and the copper pipe in a vertical state during brazing, so that the welding surface between the steel pipe and the copper pipe is in a horizontal state, the steel pipe and the copper pipe are limited, then the steel pipe and the copper pipe are rotated in a horizontal plane, the steel pipe and the copper pipe can be fully welded in the circumferential direction, and the connection strength and the sealing property of the steel pipe and the copper pipe are improved; but also facilitates the rapid discharge of the welding-generated waste.
Description
Technical Field
The invention belongs to the technical field of gas-liquid separator processing, and particularly relates to a method for welding a U-shaped pipe for a low-cost gas-liquid separator.
Background
In an evaporator of an air conditioner, since liquid is evaporated in the evaporator and the process of changing liquid into gas, a part of refrigerant may not be completely evaporated and may directly enter a compressor in consideration of a change in load. Due to the incompressibility of liquid, before entering the compressor, gas and liquid are separated from each other, so that low-pressure low-temperature steam returning to the compressor is prevented from carrying excessive liquid refrigerant to enter a cylinder of the compressor, and the condition that all the gas entering the compressor is gas is ensured, so that the normal operation of the compressor can be ensured.
The gas-liquid separator's of prior art outlet duct adopts the welding to connect the pipeline, like china's special benefit 2018.11.02 discloses the utility model patent of the assembly welding frock (patent number: CN201821806061.7) of name EGR cooler outlet duct, adopts assembly welding frock to carry out welded structure's assembly, can assemble the EGR cooler that comprises multistage steel pipe accurately without drawing the line or drawing the line very little, can remove tack welding when welding.
Because need circumference full weld between pipeline and the pipeline, then place the pipeline level among the prior art and weld, lead to the unable full weld of circumference between pipeline and the pipeline, influence the leakproofness and the fastness of outlet duct.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a method for welding a U-shaped pipe for a low-cost gas-liquid separator, aims at an air outlet pipe of a full copper pipe, greatly influences the product price by copper price, and easily causes high production cost and high risk, so that the invention adopts a structure that the lower end is a steel pipe and the upper end is a copper pipe, welds the steel pipe and the copper pipe into the U-shaped pipe as the air outlet pipe, and can reduce the cost of the U-shaped pipe.
In consideration of the requirement of circumferential full-welding between the steel pipe and the copper pipe, the invention can maintain the vertical state when the steel pipe and the copper pipe are brazed, so that the welding surface between the steel pipe and the copper pipe is in a horizontal state, then limit the steel pipe and the copper pipe, and then horizontally rotate the steel pipe and the copper pipe, so that the circumferential full-welding between the steel pipe and the copper pipe can be realized, and the connection strength and the sealing property between the steel pipe and the copper pipe are improved; but also facilitates the rapid discharge of the welding-generated waste.
Considering that in order to make the processed U-shaped pipe have serial numbers and facilitate packaging and delivery in the later period, ink-jet labeling needs to be carried out on the outer surface of the copper pipe, and in the ink-jet labeling process, in order to prevent the copper pipe from deforming and prevent impurities from entering the copper pipe, the copper pipe is blocked and shaped; in order to facilitate the brazing of the steel pipe and the copper pipe and take out the whole brazed U-shaped pipe, the invention combines the opening and closing of the plugging device, thereby avoiding the influence of the plugging device on the subsequent operation of the copper pipe.
Considering that the ink-jet labeling operation and the brazing operation have enough operation space, the clamped copper pipe is rotated by 180 degrees, the distance between the ink-jet labeling operation and the brazing operation is increased, and the sufficient operation space for the ink-jet labeling operation and the brazing operation is further ensured.
In order to solve the technical problems, the invention adopts the following technical scheme:
the welding method of the U-shaped pipe for the low-cost gas-liquid separator is characterized by comprising the following steps of:
a. blanking the steel pipe, then bending the pipe, and then flaring the end part of the steel pipe, wherein the end part is used for being welded and fixed with the copper pipe.
b. Mounting the copper pipe clamping device on a rotary worktable:
(1) the copper pipe clamping device comprises a locking head with threads, mounting brackets arranged on the locking head and a first cylinder arranged in the mounting brackets, wherein the two mounting brackets are symmetrically welded on the outer surface of the locking head, and a clamping plate is arranged at the end part of the first cylinder.
(2) The rotary worktable comprises a supporting plate, a rotating plate and a rotating sleeve with a threaded hole, wherein a first motor is installed in the supporting plate, the first motor controls the rotating plate to rotate on the vertical surface of the supporting plate, a U-shaped mounting plate is arranged at the bottom of the rotating plate, a second motor is installed in the U-shaped mounting plate, and the second motor controls the rotating sleeve to rotate in the central hole of the rotating plate in the horizontal plane.
(3) The locking head of the copper pipe clamping device is screwed into the threaded hole of the rotating sleeve, and meanwhile, a first fixing screw is screwed between the mounting bracket and the rotating plate.
c. Mounting the plugging device on top of the mounting bracket:
(1) the plugging device who adopts includes alignment support and the shutoff head that two symmetries set up, it includes L shaped steel to aim at the support, the threaded rod and be equipped with open-ended U type connecting plate, the threaded rod welding is on the top of L shaped steel, the threaded rod passes U type connecting plate, single threaded rod is equipped with two nuts, the nut sets up respectively on the top surface and the bottom surface of U type connecting plate, one of them U type connecting plate is equipped with and aims at board and third motor, third motor control aims at the board and rotates on U type connecting plate, the shutoff head is installed on aiming at the board, it is equipped with the second cylinder to aim at the board, the shutoff head is connected in the second cylinder.
(2) The nuts on all the threaded rods are controlled to keep the same height.
(3) And fixing the L-shaped steel on the top of the mounting bracket through a second fixing screw.
d. Installing and bidirectionally clamping a copper pipe:
(1) the copper pipe is vertically sleeved into the through hole of the locking head.
(2) And driving a first air cylinder which controls the clamping plate to clamp the outer surface of the copper pipe.
e. Plugging and shaping the copper pipe:
(1) and starting a third motor, controlling the alignment plate to rotate 90 degrees on the U-shaped connecting plate by the third motor, enabling the alignment plate to enter into another U-shaped connecting plate at the moment, and enabling the plugging head and the copper pipe to be arranged up and down correspondingly at the moment.
(2) And driving a second cylinder, driving the blocking head to vertically move downwards by the second cylinder, and enabling the blocking head to enter and be matched with the pipe orifice of the copper pipe to block and shape the copper pipe.
f. And ink-jet labeling is carried out on the outer surface of the copper pipe, so that the processed U-shaped pipe has a serial number, and later packaging and delivery are facilitated. For example, the Chinese patent application No. 2011.08.22 discloses an ink jet marking device (CN 201120306112.1) for copper tube detection.
g. Copper pipe and steel pipe fixed connection:
(1) and controlling the first motor to rotate 180 degrees, so that the pipe orifice of the copper pipe is arranged downwards.
(2) And (4) returning to the second cylinder, enabling the plugging head to be separated from the pipe orifice of the copper pipe, controlling the alignment plate to rotate on the U-shaped connecting plate in the reverse direction by 90 degrees by using the third motor, and enabling the alignment plate to rotate out of the other U-shaped connecting plate at the moment, wherein the alignment plate is in an open state.
(3) The copper pipe is established to the flaring section cover of steel pipe, and with the steel pipe spacing on U type connecting plate, reopen first motor, first motor control rotates the sleeve pipe at the uniform velocity in the centre bore of rotor plate, then to the operation of brazing between the flaring section of steel pipe and the copper pipe, after the full welding between the flaring section of steel pipe and the copper pipe, stop the operation of brazing, obtain U type pipe, stop first motor work again, then reply first cylinder, and take out U type pipe from the through-hole of locking head, place on the conveyer belt in unison.
(4) The first motor is controlled to rotate 180 degrees in the reverse direction.
h. And d, repeating the step d to the step g, and processing in batches to obtain the U-shaped pipes.
Further, after the operation of the step a is finished, soaking the copper pipe in the copper pipe cleaning agent, wherein the soaking temperature is controlled to be 50-60 ℃, the soaking time is controlled to be 20-30 min, then taking out the copper pipe, cleaning the copper pipe with clean water, cleaning the processed copper pipe, and removing impurities. The copper pipe cleaning agent is the prior art, and for example, China Special interest 2011.03.07 discloses an invention patent named as copper pipe cleaning agent and cleaning method (application number: CN 201110053171.7).
Further, in step b, in order to weld two installing supports on the surface of locking head symmetrically, the bottom screw thread of locking head changes over into the horizontal plate, the top surface of this horizontal plate is the horizontal plane, measure the vertical distance between the top surface of horizontal plate to the top surface of locking head simultaneously, when the horizontal plate changes the mounted position of installing support, stop rotating the horizontal plate, then place the installing support on the horizontal plate, and hug closely the installing support on the surface of locking head, weld the installing support on the surface of locking head again, the bottom surface of installing support and the screw thread of locking head top coincide mutually. The operation can control the two clamping plates to be at the same height, so that the later-stage bidirectional clamping of the copper pipe is firm and stable.
Further, in the step c, the height of the blocking head is determined by rotating and adjusting the positions of the two nuts on the threaded rod, and when the blocking head enters and is matched with the pipe opening of the copper pipe, the length of the blocking head extending into the pipe opening is 1/4-1/3 of the total length of the blocking head. The copper pipe nut can adjust the setting height of the plugging head, and further adjust the length of the plugging head extending into the pipe orifice; the length of the plugging head extending into the pipe opening is 1/4-1/3 of the total length of the plugging head, so that the plugging head can play a plugging effect on the pipe opening of the copper pipe, the stroke of the second cylinder is reduced as far as possible, and the plugging head can rapidly enter or separate from the copper pipe.
Furthermore, in the step d, before vertically sleeving the copper pipe into the through hole of the locking head, the inner wall of the through hole of the locking head is wiped by adopting clean cloth, so that the copper pipe can be smoothly sleeved into the through hole of the locking head.
Further, in step g, when the copper pipe is sleeved with the flaring section of the steel pipe, the steel pipe limiting plate slides into the U-shaped connecting plate, meanwhile, the steel pipe limiting plate is tightly attached to the side face of the alignment plate, the U-shaped fixture block at the top of the steel pipe limiting plate is clamped on the outer surface of the steel pipe, meanwhile, the flaring section of the steel pipe is supported on the top surface of the U-shaped fixture block, and then the first motor is started to perform subsequent operation. The operation can limit the steel pipe on the U-shaped connecting plate, and the steel pipe limiting plate can slide in or move out of the U-shaped connecting plate very conveniently; and the steel pipe limiting plate acts on the steel pipe and acts on the side face of the alignment plate, so that the bearing capacity of the steel pipe limiting plate is properly increased.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. aiming at the air outlet pipe of the full copper pipe, the product price is greatly influenced by the copper price, and the production cost and the risk are easily caused to be large, so the lower end structure of the air outlet pipe is a steel pipe, the upper end structure of the air outlet pipe is a copper pipe, the steel pipe and the copper pipe are welded into a U-shaped pipe, and the air outlet pipe is used for reducing the cost of the U-shaped pipe.
2. When the steel pipe and the copper pipe are brazed, the copper pipe is vertically sleeved into the through hole of the locking head, the copper pipe is clamped and limited by the copper pipe clamping device, the flared section of the steel pipe is sleeved on the copper pipe, the steel pipe is limited on the U-shaped connecting plate, the steel pipe and the copper pipe can be maintained in a vertical state when being brazed, and the welding surface between the steel pipe and the copper pipe is in a horizontal state. Because install the second motor in the U type mounting panel, the second motor control rotates the sleeve pipe at the central hole mid-water level of rotor plate and rotates, and copper pipe clamping device's locking head threaded connection rotates in sheathed tube screw hole, carry out the horizontal rotation to steel pipe and copper pipe, start first motor, first motor control rotates the sleeve pipe at the uniform velocity in the central hole of rotor plate, then to the operation of brazing between the flaring section of steel pipe and the copper pipe, can be to the full weld of circumference between steel pipe and the copper pipe, increase the joint strength and the leakproofness of steel pipe and copper pipe, and be convenient for discharge the waste material that the welding produced fast.
3. According to the invention, ink-jet labeling is carried out on the outer surface of the copper pipe, so that the processed U-shaped pipe has a serial number, and packaging and delivery at the later stage are facilitated. Before the ink-jet labeling process, the second cylinder is driven, the second cylinder drives the plugging head to vertically move downwards, the plugging head enters and is matched with the pipe opening of the copper pipe at the moment, and the copper pipe is plugged and shaped to prevent the copper pipe from deforming and prevent impurities from entering the copper pipe. According to the invention, the plugging device is combined with opening and closing, so that the steel pipe and the copper pipe can be conveniently brazed, the whole brazed U-shaped pipe can be conveniently taken out, and the influence of the plugging device on the subsequent operation of the copper pipe is avoided.
4. According to the invention, the first motor is arranged on the supporting plate, the first motor controls the rotating plate to rotate on the vertical surface of the supporting plate, the first motor is controlled to rotate 180 degrees, so that the pipe opening of the copper pipe is arranged downwards, the clamped copper pipe can be rotated 180 degrees, the distance between ink-jet labeling operation and brazing operation is increased, and further, the sufficient operation space for the ink-jet labeling operation and the brazing operation is ensured.
5. The U-shaped pipes processed by the invention are managed uniformly by the conveyer belt, so that the later packing procedure is convenient, and the U-shaped pipes can be processed in batches.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a rotary table according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic structural view of a copper pipe clamping device according to the present invention;
FIG. 4 is a schematic view of the copper tube clamping device of the present invention in a configuration for mounting the copper tube clamping device to a rotary table;
FIG. 5 is a schematic view of the present invention in the configuration for mounting the occluding device to the top of a mounting bracket;
FIG. 6 is a schematic view of the occluding device of the present invention;
FIG. 7 is a schematic view of the alignment bracket of the present invention;
FIG. 8 is a schematic structural view of the copper pipe being subjected to plugging and sizing according to the present invention;
FIG. 9 is a schematic structural view of the present invention when the copper pipe and the steel pipe are fixedly connected;
FIG. 10 is a schematic structural view of a limiting plate of steel pipes according to the present invention;
FIG. 11 is a schematic view showing the structure of a U-shaped tube for a gas-liquid separator in the present invention.
In the figure, 1-copper tube clamping device; 2-rotating the working table; 3-a locking head; 4, mounting a bracket; 5-a first cylinder; 6-clamping the plate; 7-a support plate; 8-rotating plate; 9-rotating the sleeve; 10-a threaded hole; 11-a first electric machine; a 12-U shaped mounting plate; 13-a second electric machine; 14-an alignment support; 15-plugging head; 16-L section steel; 17-a threaded rod; 18-U-shaped connecting plates; 19-a nut; 20-an alignment plate; 21-a third motor; 22-a second cylinder; 23-a second set screw; 24-a first set screw; 25-copper tubing; 26-a steel pipe; 27-a flared section; 28-steel pipe limiting plate; a 29-U-shaped fixture block.
Detailed Description
As shown in fig. 1 to 11, the method for welding a U-shaped pipe for a low-cost gas-liquid separator according to the present invention comprises the steps of:
a. blanking the steel pipe, then bending the pipe, and then flaring the end part of the steel pipe, wherein the end part is used for being welded and fixed with the copper pipe.
And c, after the operation of the step a is finished, soaking the copper pipe in the copper pipe cleaning agent, wherein the soaking temperature is controlled to be 50-60 ℃, the soaking time is controlled to be 20-30 min, then taking out the copper pipe, cleaning the copper pipe with clean water, and cleaning the processed copper pipe to remove impurities. The copper pipe cleaning agent is the prior art, and for example, China Special interest 2011.03.07 discloses an invention patent named as copper pipe cleaning agent and cleaning method (application number: CN 201110053171.7).
b. Mounting the copper pipe clamping device 1 on the rotary worktable 2:
(1) the copper pipe clamping device 1 that adopts is including being equipped with screwed locking head 3, setting up installing support 4 on locking head 3 and installing first cylinder 5 in installing support 4, and two installing support 4 symmetric welding are on locking head 3's surface, and the tip of first cylinder 5 is equipped with pinch-off blades 6, and pinch-off blades 6 are circular-arcly.
(2) The adopted rotary worktable 2 comprises a supporting plate 7, a rotary plate 8 and a rotary sleeve 9 provided with a threaded hole 10, wherein a first motor 11 is installed on the supporting plate 7, and the first motor 11 controls the rotary plate 8 to rotate on the vertical surface of the supporting plate 7. The bottom of the rotating plate 8 is provided with a U-shaped mounting plate 12, a second motor 13 is arranged in the U-shaped mounting plate 12, and the second motor 13 controls the rotating sleeve 9 to horizontally rotate in the central hole of the rotating plate 8.
(3) The locking head 3 of the copper tube clamping device 1 is screwed into the threaded bore 10 of the rotary sleeve 9, while a first fixing screw 24 is screwed in between the mounting bracket 4 and the swivel plate 8.
In order to weld two installing support 4 symmetries on the surface of locking head 3, turn over into the horizontal plate at the bottom screw thread of locking head 3, the top surface of this horizontal plate is the horizontal plane, measure the vertical distance between the top surface of horizontal plate to the top surface of locking head 3 simultaneously, when the horizontal plate rotated the mounted position of installing support 4, stop rotating the horizontal plate, then place installing support 4 on the horizontal plate, and hug closely installing support 4 on the surface of locking head 3, weld installing support 4 on the surface of locking head 3 again, the bottom surface of installing support 4 and the screw thread of locking head 3 the top coincide mutually. The operation can control the two clamping plates 6 to be at the same height, so that the later-stage bidirectional clamping of the copper pipe is firm and stable.
c. Mounting the plugging device on top of the mounting bracket 4:
(1) the adopted plugging device comprises two symmetrically-arranged aligning supports 14 and plugging heads 15, each aligning support 14 comprises L-shaped steel 16, a threaded rod 17 and a U-shaped connecting plate 18 with an opening, the threaded rod 17 is welded on the top of the L-shaped steel 16, the threaded rod 17 penetrates through the U-shaped connecting plate 18, each threaded rod 17 is provided with two nuts 19, the nuts 19 are respectively arranged on the top surface and the bottom surface of the U-shaped connecting plate 18, one U-shaped connecting plate 18 is provided with an aligning plate 20 and a third motor 21, the third motor 21 controls the aligning plate 20 to rotate on the U-shaped connecting plate 18, the plugging heads 15 are installed on the aligning plates 20, the aligning plates 20 are provided with second air cylinders 22, and the second air cylinders 22 are in driving connection with the plugging heads 15.
(2) The nuts 19 on all the threaded rods 17 are controlled to maintain a uniform height.
(3) The L-shaped steel 16 is fixed on top of the mounting bracket 4 by second fixing screws 23.
The height of the blocking head 15 is determined by rotationally adjusting the positions of the two nuts 19 on the threaded rod 17, and when the blocking head 15 enters and is matched in the pipe opening of the copper pipe, the length of the blocking head 15 extending into the pipe opening is 1/4-1/3 of the total length of the blocking head 15. The copper pipe nut 19 can adjust the setting height of the plugging head 15, and further adjust the length of the plugging head 15 extending into the pipe orifice; the length of the plugging head 15 extending into the pipe orifice is 1/4-1/3 of the total length of the plugging head 15, so that the plugging head 15 can play a role in plugging the pipe orifice of the copper pipe, the stroke of the second cylinder 22 is reduced as much as possible, and the plugging head 15 can rapidly enter or separate from the copper pipe.
d. Mounting and bidirectionally clamping the copper tube 25:
(1) the copper tube 25 is vertically sleeved into the through hole of the locking head 3.
(2) The first cylinder 5 is driven, and the first cylinder 5 controls the clamping plate 6 to clamp the outer surface of the copper pipe 25.
Before vertically emboliaing copper pipe 25 in the through-hole of locking head 3, adopt clean cloth to clean the inner wall of locking head 3 through-hole for copper pipe 25 can smoothly embolia in the through-hole of locking head 3.
e. And (3) plugging and shaping the copper pipe 25:
(1) and starting the third motor 21, controlling the alignment plate 20 to rotate 90 degrees on the U-shaped connecting plate 18 by the third motor 21, enabling the alignment plate 20 to enter into the other U-shaped connecting plate 18 at the moment, and enabling the blocking head 15 and the copper pipe 25 to be arranged up and down correspondingly at the moment.
(2) The second cylinder 22 is driven, the second cylinder 22 drives the plugging head 15 to vertically move downwards, and at the moment, the plugging head 15 enters and is matched with the pipe orifice of the copper pipe 25 to plug and shape the copper pipe 25.
f. The outer surface of the copper pipe 25 is subjected to ink-jet marking, and the processed U-shaped pipe is provided with a number, so that packaging and delivery at the later stage are facilitated. The outer surface of the copper tube 25 may be marked by ink jet marking using an ink jet marking device, such as that disclosed in the chinese patent application No. CN201120306112.1 entitled ink jet marking device for detecting copper tubes 25, which is proprietary to chinese patent No. 2011.08.22.
g. The copper pipe 25 and the steel pipe 26 are fixedly connected:
(1) the first motor 11 is controlled to rotate 180 degrees, so that the nozzle of the copper pipe 25 is arranged downwards.
(2) Returning to the second cylinder 22, the plugging head 15 is released from the opening of the copper tube 25, and then the third motor 21 controls the alignment plate 20 to rotate on the U-shaped connecting plate 18 in the reverse direction by 90 °, at this time, the alignment plate 20 is rotated out of the other U-shaped connecting plate 18, and the alignment plate 20 is in an open state.
(3) The flaring section of the steel pipe 26 is sleeved on the copper pipe 25, the steel pipe 26 is limited on the U-shaped connecting plate 18, the first motor 11 is started again, the first motor 11 controls the rotating sleeve 9 to rotate at a constant speed in the central hole of the rotating plate 8, then the flaring section of the steel pipe 26 and the copper pipe 25 are brazed, after the flaring section of the steel pipe 26 and the copper pipe 25 are fully brazed, the brazing operation is stopped, the U-shaped pipe is obtained, the first motor 11 stops working again, then the first air cylinder 5 is returned, the U-shaped pipe is taken out from the through hole of the locking head 3 and is uniformly placed on the conveying belt.
(4) The first motor 11 is controlled to rotate in reverse 180 °.
When the flared section of the steel pipe 26 is sleeved on the copper pipe 25, the steel pipe limiting plate 28 slides into the U-shaped connecting plate 18, the steel pipe limiting plate 28 is tightly attached to the side face of the aligning plate 20, the U-shaped fixture block 29 at the top of the steel pipe limiting plate 28 is tightly clamped on the outer surface of the steel pipe 26, the flared section 27 of the steel pipe 26 is supported on the top face of the U-shaped fixture block 29, and then the first motor 11 is started to perform subsequent operations. The operation can limit the steel pipe 26 on the U-shaped connecting plate 18, and the steel pipe limiting plate 28 can slide in or move out of the U-shaped connecting plate 18 conveniently; and the tube stop plates 28 act on the tubes 26 and also on the sides of the alignment plate 20, suitably increasing the load bearing capacity of the tube stop plates 28.
h. And d, repeating the step d to the step g, and processing in batches to obtain the U-shaped pipes.
The invention has the following beneficial effects:
1. aiming at the air outlet pipe of the whole copper pipe, the product price is greatly influenced by the copper price, and the production cost and the risk are easily caused to be large, so the lower end structure of the air outlet pipe is a steel pipe 26, the upper end structure of the air outlet pipe is a copper pipe 25, the steel pipe 26 and the copper pipe 25 are welded into a U-shaped pipe, and the air outlet pipe is used as the air outlet pipe, and the cost of the U-shaped pipe can be reduced.
2. According to the invention, when the steel pipe 26 and the copper pipe 25 are brazed, the copper pipe 25 is vertically sleeved in the through hole of the locking head 3, meanwhile, the copper pipe 25 is clamped and limited by the copper pipe clamping device 1, the flaring section 27 of the steel pipe 26 is sleeved on the copper pipe 25, the steel pipe 26 is limited on the U-shaped connecting plate 18, the steel pipe 26 and the copper pipe 25 can be maintained in a vertical state when being brazed, and the welding surface between the steel pipe 26 and the copper pipe 25 is in a horizontal state. Because the U-shaped mounting plate 12 is internally provided with the second motor 13, the second motor 13 controls the rotating sleeve 9 to horizontally rotate in the central hole of the rotating plate 8, the locking head 3 of the copper pipe clamping device 1 is in threaded connection with the threaded hole 10 of the rotating sleeve 9, the steel pipe 26 and the copper pipe 25 are horizontally rotated, the first motor 11 is started, the first motor 11 controls the rotating sleeve 9 to rotate in the central hole of the rotating plate 8 at a constant speed, then the brazing operation is carried out between the flaring section 27 of the steel pipe 26 and the copper pipe 25, the steel pipe 26 and the copper pipe 25 can be circumferentially fully welded, the connecting strength and the sealing performance of the steel pipe 26 and the copper pipe 25 are improved, and waste materials generated by welding can be rapidly discharged.
3. According to the invention, ink-jet labeling is carried out on the outer surface of the copper pipe 25, so that the processed U-shaped pipe has a serial number, and packaging and delivery at the later stage are facilitated. Before the ink-jet labeling process, the second cylinder 22 is driven, the second cylinder 22 drives the plugging head 15 to vertically move downwards, at the moment, the plugging head 15 enters and is matched with the pipe opening of the copper pipe 25, and the copper pipe 25 is plugged and shaped to prevent the copper pipe 25 from deforming and prevent impurities from entering the copper pipe 25. One of the U-shaped connecting plates 18 is provided with an alignment plate 20 and a third motor 21, the third motor 21 controls the alignment plate 20 to rotate on the U-shaped connecting plate 18, and the plugging head 15 is installed on the alignment plate 20.
4. According to the invention, the first motor 11 is arranged on the supporting plate 7, the first motor 11 controls the rotating plate 8 to rotate on the vertical surface of the supporting plate 7, the first motor 11 is controlled to rotate 180 degrees, so that the pipe orifice of the copper pipe 25 is arranged downwards, the clamped copper pipe 25 can be rotated 180 degrees, the distance between the ink-jet labeling operation and the brazing operation is increased, and further, the sufficient operation space for the ink-jet labeling operation and the brazing operation is ensured.
5. The U-shaped pipes processed by the invention are managed uniformly by the conveyer belt, so that the later packing procedure is convenient, and the U-shaped pipes can be processed in batches.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (6)
1. The welding method of the U-shaped pipe for the low-cost gas-liquid separator is characterized by comprising the following steps of:
a. blanking the steel pipe, then performing pipe bending operation, and then flaring the end part of the steel pipe, wherein the end part is used for welding and fixing with the copper pipe;
b. mounting the copper pipe clamping device on a rotary worktable:
(1) the adopted copper pipe clamping device comprises a locking head with threads, mounting brackets arranged on the locking head and a first air cylinder arranged in the mounting brackets, the two mounting brackets are symmetrically welded on the outer surface of the locking head, and a clamping plate is arranged at the end part of the first air cylinder;
(2) the adopted rotary worktable comprises a supporting plate, a rotating plate and a rotary sleeve with a threaded hole, wherein a first motor is installed on the supporting plate and controls the rotating plate to rotate on the vertical surface of the supporting plate, a U-shaped mounting plate is arranged at the bottom of the rotating plate, a second motor is installed in the U-shaped mounting plate, and the second motor controls the rotary sleeve to rotate horizontally in a central hole of the rotating plate;
(3) connecting a locking head of the copper pipe clamping device into a threaded hole of a rotating sleeve in a threaded manner, and simultaneously screwing a first fixing screw between the mounting bracket and the rotating plate;
c. mounting the plugging device on top of the mounting bracket:
(1) the adopted plugging device comprises two symmetrically-arranged aligning supports and plugging heads, each aligning support comprises L-shaped steel, a threaded rod and a U-shaped connecting plate with an opening, the threaded rod is welded on the top of the L-shaped steel and penetrates through the U-shaped connecting plate, each threaded rod is provided with two nuts, the nuts are respectively arranged on the top surface and the bottom surface of the U-shaped connecting plate, one U-shaped connecting plate is provided with an aligning plate and a third motor, the third motor controls the aligning plate to rotate on the U-shaped connecting plate, the plugging heads are installed on the aligning plates, the aligning plate is provided with a second air cylinder, and the second air cylinder is in driving connection with the plugging heads;
(2) controlling the nuts on all the threaded rods to keep consistent height;
(3) fixing the L-shaped steel on the top of the mounting bracket through a second fixing screw;
d. installing and bidirectionally clamping a copper pipe:
(1) vertically sleeving a copper pipe into the through hole of the locking head;
(2) driving a first air cylinder, wherein the first air cylinder controls a clamping plate to clamp the outer surface of the copper pipe;
e. plugging and shaping the copper pipe:
(1) starting a third motor, controlling the alignment plate to rotate 90 degrees on the U-shaped connecting plate by the third motor, enabling the alignment plate to enter the other U-shaped connecting plate, and enabling the plugging head and the copper pipe to be arranged up and down correspondingly;
(2) driving a second cylinder, driving a blocking head to vertically move downwards by the second cylinder, and enabling the blocking head to enter and be matched with a pipe orifice of the copper pipe to block and shape the copper pipe;
f. carrying out ink jet marking on the outer surface of the copper pipe;
g. copper pipe and steel pipe fixed connection:
(1) controlling a first motor to rotate 180 degrees, so that the pipe orifice of the copper pipe is arranged downwards;
(2) returning to the second cylinder, removing the blocking head from the pipe orifice of the copper pipe, controlling the alignment plate to rotate on the U-shaped connecting plate in the reverse direction by 90 degrees by using the third motor, rotating the alignment plate out of the other U-shaped connecting plate at the moment, and opening the alignment plate;
(3) sleeving the flaring section of the steel pipe on the copper pipe, limiting the steel pipe on the U-shaped connecting plate, starting the first motor, controlling the rotating sleeve to rotate in the central hole of the rotating plate at a constant speed by the first motor, then performing brazing operation between the flaring section of the steel pipe and the copper pipe, stopping the brazing operation after the flaring section of the steel pipe and the copper pipe are fully welded to obtain a U-shaped pipe, stopping the first motor to work, then returning to the first air cylinder, taking out the U-shaped pipe from the through hole of the locking head, and uniformly placing the U-shaped pipe on the conveying belt;
(4) controlling the first motor to rotate 180 degrees in the reverse direction;
h. and d, repeating the step d to the step g, and processing in batches to obtain the U-shaped pipes.
2. The welding method of a U-shaped pipe for a low-cost gas-liquid separator according to claim 1, characterized in that: and c, after the operation of the step a is finished, soaking the copper pipe in the copper pipe cleaning agent, wherein the soaking temperature is controlled to be 50-60 ℃, the soaking time is controlled to be 20-30 min, and then taking out the copper pipe and cleaning the copper pipe with clean water.
3. The welding method of a U-shaped pipe for a low-cost gas-liquid separator according to claim 1, characterized in that: in step b, in order to symmetrically weld the two mounting brackets on the outer surface of the locking head, the bottom threads of the locking head are turned into a horizontal plate, the top surface of the horizontal plate is a horizontal plane, the vertical distance from the top surface of the horizontal plate to the top surface of the locking head is measured simultaneously, when the horizontal plate is turned to the mounting position of the mounting brackets, the horizontal plate is stopped to rotate, then the mounting brackets are placed on the horizontal plate, the mounting brackets are attached to the outer surface of the locking head, the mounting brackets are welded on the outer surface of the locking head, and the bottom surfaces of the mounting brackets coincide with the uppermost threads of the locking head.
4. The welding method of a U-shaped pipe for a low-cost gas-liquid separator according to claim 1, characterized in that: and in the step c, the height of the blocking head is determined by rotating and adjusting the positions of the two nuts on the threaded rod, and when the blocking head enters and is matched with the pipe orifice of the copper pipe, the length of the blocking head extending into the pipe orifice is 1/4-1/3 of the total length of the blocking head.
5. The welding method of a U-shaped pipe for a low-cost gas-liquid separator according to claim 1, characterized in that: in the step d, before the copper pipe is sleeved into the through hole of the locking head, the inner wall of the through hole of the locking head is wiped by clean cloth.
6. The welding method of a U-shaped pipe for a low-cost gas-liquid separator according to claim 1, characterized in that: and g, when the flaring section of the steel pipe is sleeved on the copper pipe, sliding the steel pipe limiting plate into the U-shaped connecting plate, tightly attaching the steel pipe limiting plate to the side surface of the alignment plate, clamping the U-shaped fixture block at the top of the steel pipe limiting plate on the outer surface of the steel pipe, supporting the flaring section of the steel pipe on the top surface of the U-shaped fixture block, and starting the first motor to perform subsequent operation.
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| CN114633086B (en) * | 2022-04-01 | 2023-10-17 | 东莞市科美斯科技实业有限公司 | Refrigeration plant accessory integral type assembly set for cold chain |
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| CN1042006C (en) * | 1993-05-17 | 1999-02-10 | 三电有限公司 | Heat exchanger |
| CN1448244A (en) * | 2002-04-02 | 2003-10-15 | 珠海格力电器股份有限公司 | Machining method of multi-fold heat exchanger and cutting and bending equipment thereof |
| CN100445623C (en) * | 2006-09-20 | 2008-12-24 | 左铁军 | Refrigeration pipe composed of copper elbow and U pipe of aluminum, and preparation method |
| CN101147995A (en) * | 2006-09-22 | 2008-03-26 | 浙江新龙实业有限公司 | Method for welding aluminium pipe, method for welding aluminium pipe type heat exchanger and device for welding aluminium pipe |
| JP5240892B2 (en) * | 2007-01-29 | 2013-07-17 | 新光機器株式会社 | Cooling water stop device for electric resistance spot welding machine, and electric resistance spot welding machine provided with the same |
| CN101590553A (en) * | 2008-05-30 | 2009-12-02 | 乐金电子(天津)电器有限公司 | Heat exchanger of air condition covers copper-aluminum wrapped calandria and U-shaped copper pipe elbow welder and method |
| US20100098371A1 (en) * | 2008-10-20 | 2010-04-22 | Perkins Larry L | Load-bearing products and method for making same |
| EP2831528A1 (en) * | 2012-03-30 | 2015-02-04 | BSH Bosch und Siemens Hausgeräte GmbH | Heat exchanger, household appliance comprising such heat exchanger and method for manufacturing such heat exchanger |
| CN102642065B (en) * | 2012-05-16 | 2013-06-26 | 力创(台山)电子科技有限公司 | Process for welding two devices for manufacturing copper-aluminum composite tube and welding ring |
| CN102962632B (en) * | 2012-11-30 | 2016-02-24 | 东莞市金瑞五金制品有限公司 | The method of attachment of compressor inleting pipe and compressor |
| CN103343847B (en) * | 2013-07-09 | 2018-02-02 | 扬州红人实业有限公司 | Cu-AL pipe and its welding procedure |
| CN104015019A (en) * | 2014-05-29 | 2014-09-03 | 浙江三花制冷集团有限公司 | Air header component manufacturing method and heat exchanger using air header component |
| CN105414858B (en) * | 2015-01-28 | 2017-05-10 | 安徽众汇制冷有限公司 | Method for manufacturing gas-liquid separator welding jig |
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Denomination of invention: Welding method of U-tube for low cost gas-liquid separator Effective date of registration: 20221009 Granted publication date: 20210525 Pledgee: Shengzhou Sub-branch of Postal Savings Bank of China Co.,Ltd. Pledgor: ZHEJIANG FUYUAN (FUCOOL) REFRIGERATION EQUIPMENT CO.,LTD. Registration number: Y2022330002504 |