Manufacturing process of integrated stretching liquid storage device
Technical Field
The invention relates to the technical field of refrigeration equipment manufacturing, and further relates to a manufacturing process of an integrated stretching liquid storage device.
Background
The liquid accumulator is an important part of the compressor and mainly plays roles in storage, gas-liquid separation, filtration, noise reduction and refrigerant buffering. The reservoir generally comprises a main body, an air inlet pipe, an air outlet pipe, a filter screen and other parts.
At present, the traditional liquid storage device main body is split, a series of processes such as cutting, chamfering, flaring and the like are required to be carried out on the joint of the main body, the operation is complex, and the joint is easy to leak; meanwhile, the main body is connected with the air outlet pipe and the air inlet pipe by brazing, the brazing temperature is high, and the originally low hardness of the copper air inlet pipe and the copper air outlet pipe is reduced to be lower in the brazing process; the air inlet pipe and the exhaust pipe are located at two ends of the liquid storage device, and the liquid storage device is easy to deform in the process of water detection (leakage detection by airtight pressure), inspection, packaging, carrying, transportation and other links after brazing, so that the problems of poor size, collision damage, deformation, out-of-roundness and the like are caused, and the problems of difficult assembly or abnormal assembly are caused.
Therefore, the existing technology needs reasonable structural design, simple process, low-price one-stage stretching liquid storage device manufacturing technology to overcome the difficulties, and can avoid the damage of welding to the liquid storage device.
Disclosure of Invention
In view of the above, the invention provides the manufacturing process of the integrated stretching liquid storage device, which is reasonable in structural design, simple in process, capable of avoiding damage to the liquid storage device caused by welding and low in cost.
In order to achieve the purpose, the invention adopts the following technical scheme: the manufacturing process of the integrated stretching liquid storage device comprises the following steps:
(1) shearing the raw material of the liquid reservoir main pipe, and shearing the raw material of the liquid reservoir main pipe by using a material shearing machine according to the specification of a product;
(2) performing, namely stretching the sheared material into a specified size and flanging;
(3) trimming, namely putting the product into a punch or a trimming machine die for trimming, wherein one end of a flanging of the main body of the liquid accumulator is an air inlet end, and the other end of the flanging is open;
(4) the liquid storage device also comprises a filter screen and a fixing plate, and the filter screen and the fixing plate are welded inside the main body in sequence from the air inlet end to the opening;
(5) spinning, namely spinning the assembled machine parts by using a spinning machine to spin the air inlet end and the clamping groove;
(6) the liquid storage device also comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is welded with the air inlet end, and the air outlet pipe is welded with the air outlet end;
(7) detecting air tightness, namely detecting whether the liquid storage device leaks or not;
(8) and (6) packaging, namely packaging the qualified products.
The liquid storage device has the beneficial effects that the main body of the liquid storage device is integrally formed in a stretching mode, and the surface of the main body is not provided with a connecting welding line, so that leakage can be avoided; the main body, the air inlet pipe and the air outlet pipe are welded through resistance welding, and compared with a soldered joint, the resistance welding has the advantages of better strength and air tightness, smaller heat affected area and no consumption of other welding materials; the welding gas pressure and the brazing defects of flame brazing are avoided: sand holes, shrinkage porosity, cracks and the like, so that the welding process of the main body, the air inlet pipe and the air outlet pipe is safer and more efficient, and the welding quality is higher; the invention has simple manufacturing process and lower manufacturing cost.
Further, the main pipe raw material in the step (1) is a high-quality low-carbon steel plate.
Further, the welding in the step (4) and the step (6) is resistance welding.
Further, the resistance welding pressure welding process comprises the following steps:
1) and pre-pressing to ensure good contact of the workpiece.
2) Electrifying, transmitting current between the air inlet pipe and the main body and between the air outlet pipe and the main body through a clamp matched with the air inlet pipe or the air outlet pipe and the main body, generating resistance heat at the combination part of the air inlet pipe and the main body, and generating interaction force among molecules to form a resistance welding joint;
3) and (3) cutting off the power and forging, cooling and crystallizing the nugget under the continuous action of pressure, and forming a weld joint with compact structure and no shrinkage cavity or crack.
Further, in the spinning in the step (5), the opening is spun out of the end face of the air inlet end by a spinning machine, and a clamping groove for limiting the filter screen and the fixing plate is rolled on the outer surface of the main body.
Further, in the step (6), the air inlet pipe and the air outlet pipe are integrally formed by drawing a copper-plated low-carbon steel pipe or a copper-iron composite plate; the air inlet pipe machining process comprises the following steps: cutting or punching, chamfering, prefabricating resistance welding steps, positioning or flaring, cleaning and passivating inspection; the processing procedure of the air outlet pipe is as follows: cutting off, chamfering, bending, prefabricating resistance welding steps, necking or flaring, cleaning and passivating inspection.
Further, the liquid storage device of the air tightness detection handle in the step (7) is fixed on a clamp and is completely immersed in water, two ends of the air inlet pipe and the air outlet pipe are sealed and continuously pressurized for 1-3min, and whether leakage phenomena exist at the welding position of the air inlet pipe and the air outlet pipe of the liquid storage device and the main body is checked.
The invention has the beneficial effects that:
(1) according to the invention, the main body is integrally formed by stretching, and no connecting welding line is arranged on the surface, so that the processing procedure of the main body of the liquid storage device is simplified, the processing efficiency is improved, the sealing performance of the main body is better, and the phenomenon of main body leakage is avoided.
(2) The liquid storage device main body, the air inlet pipe and the air outlet pipe are hermetically welded through resistance welding, so that the welding process is safer and more efficient, and the welding quality is higher; the manufacturing cost is lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a manufacturing process of the present invention;
FIG. 2 is a schematic structural view of embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention;
in the figure, 1 is a main body; 2 is an air inlet pipe; 3 is an air outlet pipe; 4 is a filter screen; 5 is a boss; 6 is a fixed plate; 11 is an inner cavity; 12 is an air inlet; 13 is an air outlet; and 14 is a card slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. As shown in fig. 1: the manufacturing process of the integrated stretching liquid storage device comprises the following steps:
(1) shearing the raw material of the liquid reservoir main pipe, and shearing the raw material of the liquid reservoir main pipe by using a material shearing machine according to the specification of a product;
(2) performing, namely stretching the sheared material into a specified size and flanging;
(3) trimming, namely putting the product into a punch or a trimming machine die for trimming, wherein one end of a flanging of the main body of the liquid accumulator is an air inlet end, and the other end of the flanging is open;
(4) the liquid storage device also comprises a filter screen and a fixing plate, and the filter screen and the fixing plate are welded inside the main body in sequence from the air inlet end to the opening;
(5) spinning, namely spinning the assembled machine parts by using a spinning machine to spin the air inlet end and the clamping groove;
(6) the liquid storage device also comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is welded with the air inlet end, and the air outlet pipe is welded with the air outlet end;
(7) detecting air tightness, namely detecting whether the liquid storage device leaks or not;
(8) and (6) packaging, namely packaging the qualified products.
The liquid storage device has the beneficial effects that the main body of the liquid storage device is integrally formed in a stretching mode, and the surface of the main body is not provided with a connecting welding line, so that leakage can be avoided; the main body, the air inlet pipe and the air outlet pipe are welded through resistance welding, and compared with a soldered joint, the resistance welding has the advantages of better strength and air tightness, smaller heat affected area and no consumption of other welding materials; the welding gas pressure and the brazing defects of flame brazing are avoided: sand holes, shrinkage porosity, cracks and the like, so that the welding process of the main body, the air inlet pipe and the air outlet pipe is safer and more efficient, and the welding quality is higher; the invention has simple manufacturing process and lower manufacturing cost.
According to the invention, the main pipe raw material in the step (1) is a high-quality low-carbon steel plate.
In the invention, the main pipe is stretched by a stretcher in the step (2), the pulling force of the stretcher is related to the diameter, the thickness and the stretching length of the main pipe, the commonly used stretcher has 100 and 500 tons, the model diameter of the commonly used liquid accumulator is 31.8-90mm, the length of the cylinder is within 220mm, and the wall thickness is 1-3 mm. In actual production, proper main pipe materials and stretching equipment can be selected according to specific requirements.
In the invention, the welding in the step (4) and the step (6) is resistance welding pressure welding.
In the invention, the resistance welding pressure welding process comprises the following steps:
1) and pre-pressing to ensure good contact of the workpiece.
2) Electrifying, transmitting current between the air inlet pipe and the main body and between the air outlet pipe and the main body through a clamp matched with the air inlet pipe or the air outlet pipe and the main body, generating resistance heat at the combination part of the air inlet pipe and the main body, and generating interaction force among molecules to form a resistance welding joint;
3) and (3) cutting off the power and forging, cooling and crystallizing the nugget under the continuous action of pressure, and forming a weld joint with compact structure and no shrinkage cavity or crack.
Further, in the spinning in the step (5), the opening is spun out of the end face of the air inlet end by a spinning machine, and a clamping groove for limiting the filter screen and the fixing plate is rolled on the outer surface of the main body.
In the invention, the air inlet pipe and the air outlet pipe in the step (6) are integrally formed by drawing a copper-plated low-carbon steel pipe or a copper-iron composite plate; the air inlet pipe processing procedures are as follows: cutting or punching, chamfering, prefabricating resistance welding steps, positioning or flaring, cleaning and passivating inspection; the processing procedure of the air outlet pipe is as follows: cutting off, chamfering, bending, prefabricating resistance welding steps, necking or flaring, cleaning and passivating inspection.
In the invention, the airtightness detection in the step (7) is to fix the liquid reservoir on a clamp, completely immerse the liquid reservoir in water, seal the two ends of the air inlet pipe and the air outlet pipe, continuously pressurize for 1-3min, and check whether the main body of the liquid reservoir is leaked at the welding part of the main body of the liquid reservoir and the air inlet pipe and the air outlet pipe and the main body.
Example 1: as shown in fig. 2, the embodiment of the invention discloses a manufacturing process of a single-tube integrated stretching liquid accumulator, which comprises the following steps: a main body 1; the main body 1 is manufactured by the following steps
(1) Shearing a main pipe raw material, and shearing the main pipe raw material by using a material shearing machine according to the specification of a product;
(2) performing, namely stretching the sheared material into a specified size and flanging;
(3) trimming, namely putting the product into a punch or a trimming machine die for trimming, wherein one end of a flanging of the main body of the liquid accumulator is an air inlet end, and the other end of the flanging is open;
(4) assembling, wherein the liquid storage device also comprises a filter screen 4, and the filter screen 4 is welded in the main body from the air inlet end to the opening;
(5) spinning, namely spinning the air inlet end and the clamping groove 14 of the assembled machine part by using a spinning machine;
(6) the liquid storage device also comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is welded with the air inlet end, and the air outlet pipe is welded with the air outlet end;
the air inlet pipe 2 and the air outlet pipe 3 are made of copper-plated low-carbon steel and integrally stretched; the processing procedures of the air inlet pipe 2 are as follows: cutting or punching, chamfering, prefabricating resistance welding steps, positioning or flaring, cleaning and passivating inspection; the processing procedure of the air outlet pipe 3 is as follows: cutting off, chamfering, bending, prefabricating resistance welding steps, necking or flaring, cleaning and passivating inspection.
One end of the air inlet pipe 2 penetrates through the air inlet 12 to be communicated with the main body 1, and the air inlet pipe 2 and the main body 1 are hermetically welded at the air inlet 12 through resistance welding; one end of the air outlet pipe 3 penetrates through the air outlet 13 and extends into the main body 1, and the air outlet pipe 3 and the main body 1 are hermetically welded at the air outlet 13 through resistance welding; the filter screen 4 is arranged in the inner cavity 11 of the main body 1 near the end of the air inlet 12.
Specifically, an annular boss 5 is arranged on the outer wall of the gas outlet pipe 3 close to the gas outlet 13, the end part of the gas outlet pipe 3 is welded with the main body 1 in a sealing manner by resistance welding at the position from the boss 5 to the annular boss 5, and the gas outlet pipe inclines from the boss 5 to the central axis direction of the main body 1; the inner wall of the air outlet 13 of the main body 1 is in an inclined shape matched with the pipe wall of the air outlet pipe 3; an annular boss 5 is arranged on the outer wall of the air inlet pipe 2 close to the air inlet 12, the end part of the air inlet pipe 2 is welded with the main body 1 in a sealing manner through electric resistance welding to the position of the annular boss 5, and the air inlet pipe inclines from the boss 5 to the central axis direction of the main body 1; the inner wall of the main body 1 at the air inlet 12 is in an inclined shape matched with the pipe wall of the air inlet pipe 2.
The expansion coefficient and the heat conduction capacity of the main body 1 and the air inlet pipe 2 and the air outlet pipe 3 are consistent or similar, and the resistance welding press welding process is suitable for being adopted after the welding joints of the air inlet pipe 2 and the air outlet pipe 3 are welded;
the resistance welding pressure welding process comprises the following steps:
1) and pre-pressing to ensure good contact of the workpiece.
2) Electrifying, transmitting current between the air inlet pipe and the main body and between the air outlet pipe and the main body through a clamp matched with the air inlet pipe or the air outlet pipe and the main body, generating resistance heat at the combination part of the air inlet pipe and the main body, and generating interaction force among molecules to form a resistance welding joint;
3) and (3) cutting off the power and forging, cooling and crystallizing the nugget under the continuous action of pressure, and forming a weld joint with compact structure and no shrinkage cavity or crack.
Compared with a soldered joint, the electric resistance welding has better strength and air tightness, smaller heat affected area and no need of consuming other welding materials; the welding process is not affected by flame brazing welding air pressure, brazing defects (sand holes, shrinkage porosity, cracks) and the like, and compared with a resistance welding pressure welding process, the welding process is safer and more efficient, and the welding quality is higher. When the air inlet pipe 2 and the air outlet pipe 3 are made of copper-plated low-carbon steel pipes, the hardness of the low-carbon steel pipes is higher than that of a hard copper pipe, the hardness of the copper-plated low-carbon steel pipes is not changed before and after resistance welding, the size stability is higher, the inspection and the transportation are facilitated, and the packaging, the assembly and the like are facilitated. Because the copper material belongs to nonferrous metal, the purchase price is always higher than that of low-carbon steel, the ductility of the low-carbon steel can completely meet the processing requirements of parts, and the low-carbon steel can save the cost.
(7) And the airtightness detection is to fix the welded liquid accumulator on a fixture, completely immerse the liquid accumulator in water, seal two ends of the air inlet pipe and the air outlet pipe, continuously pressurize for 1-3min, and detect whether the liquid accumulator main body and the welding part of the air inlet pipe and the air outlet pipe and the main body have leakage phenomena.
(8) And (6) packaging, namely packaging qualified good products.
Example 2: as shown in fig. 3, the embodiment of the invention discloses a manufacturing process of a double-tube integrated stretching liquid reservoir, which comprises the following steps: a main body 1; the main body 1 is manufactured by the following steps:
(1) shearing a main pipe raw material, and shearing the main pipe raw material by using a material shearing machine according to the specification of a product;
(2) performing, namely stretching the sheared material into a specified size and flanging;
(3) trimming, namely putting the product into a punch or a trimming machine die for trimming, wherein one end of a flanging of the main body of the liquid accumulator is an air inlet end, and the other end of the flanging is open;
(4) the liquid storage device is assembled, the liquid storage device further comprises a filter screen 4 and a fixing plate 6, and the filter screen 4 and the fixing plate 6 are welded in the main body from the air inlet end to the opening in sequence;
(5) spinning, namely spinning the air inlet end and the clamping groove 14 of the assembled machine part by using a spinning machine;
(6) the liquid storage device also comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is welded with the air inlet end, and the air outlet pipe is welded with the air outlet end;
the air inlet pipe 2 and the air outlet pipe 3 are made of copper-plated low-carbon steel, and the air inlet pipe 2 and the air outlet pipe 3 are integrally formed by stretching a copper-plated low-carbon steel pipe or a copper-iron composite plate; the processing procedures of the air inlet pipe 2 are as follows: cutting or punching, chamfering, prefabricating resistance welding steps, positioning or flaring, cleaning and passivating inspection; the processing procedure of the air outlet pipe 3 is as follows: cutting off, chamfering, bending, prefabricating resistance welding steps, necking or flaring, cleaning and passivating inspection.
One end of the air inlet pipe 2 penetrates through the air inlet 12 to be communicated with the main body 1, and the air inlet pipe 2 and the main body 1 are hermetically welded at the air inlet 12 through resistance welding; one end of the air outlet pipe 3 penetrates through the air outlet 13 and extends into the main body 1, and the air outlet pipe 3 and the main body 1 are hermetically welded at the air outlet 13 through resistance welding; the filter screen 4 is arranged in the inner cavity 11 of the main body 1 near the end of the air outlet 12.
Specifically, an annular boss 5 is arranged on the outer wall of the gas outlet pipe 3 close to the gas outlet 13, the end part of the gas outlet pipe 3 is welded with the main body 1 in a sealing manner by resistance welding at the position from the boss 5 to the annular boss 5, and the gas outlet pipe inclines from the boss 5 to the central axis direction of the main body 1; the inner wall of the air outlet 13 of the main body 1 is in an inclined shape matched with the pipe wall of the air outlet pipe 3; an annular boss 5 is arranged on the outer wall of the air inlet pipe 2 close to the air inlet 12, the end part of the air inlet pipe 2 is welded with the main body 1 in a sealing manner through electric resistance welding to the position of the annular boss 5, and the air inlet pipe inclines from the boss 5 to the central axis direction of the main body 1; the inner wall of the main body 1 at the air inlet 12 is in an inclined shape matched with the pipe wall of the air inlet pipe 2.
The expansion coefficient and the heat conduction capacity of the main body 1 and the air inlet pipe 2 and the air outlet pipe 3 are consistent or similar, and the resistance welding press welding process is suitable for being adopted after the welding joints of the air inlet pipe 2 and the air outlet pipe 3 are welded;
the resistance welding pressure welding process comprises the following steps:
1) and pre-pressing to ensure good contact of the workpiece.
2) Electrifying, transmitting current between the air inlet pipe and the main body and between the air outlet pipe and the main body through a clamp matched with the air inlet pipe or the air outlet pipe and the main body, generating resistance heat at the combination part of the air inlet pipe and the main body, and generating interaction force among molecules to form a resistance welding joint;
3) and (3) cutting off the power and forging, cooling and crystallizing the nugget under the continuous action of pressure, and forming a weld joint with compact structure and no shrinkage cavity or crack.
Compared with a soldered joint, the electric resistance welding has better strength and air tightness, smaller heat affected area and no need of consuming other welding materials; the welding process is not affected by flame brazing welding air pressure, brazing defects (sand holes, shrinkage porosity, cracks) and the like, and compared with a resistance welding pressure welding process, the welding process is safer and more efficient, and the welding quality is higher. When the air inlet pipe 2 and the air outlet pipe 3 are made of copper-plated low-carbon steel pipes, the hardness of the low-carbon steel pipes is higher than that of a hard copper pipe, the hardness of the copper-plated low-carbon steel pipes is not changed before and after resistance welding, the size stability is higher, the inspection and the transportation are facilitated, and the packaging, the assembly and the like are facilitated. Because the copper material belongs to nonferrous metal, the purchase price is always higher than that of low-carbon steel, the ductility of the low-carbon steel can completely meet the processing requirements of parts, and the low-carbon steel can save the cost.
(9) And the airtightness detection is to fix the welded liquid accumulator on a fixture, completely immerse the liquid accumulator in water, seal two ends of the air inlet pipe and the air outlet pipe, continuously pressurize for 1-3min, and detect whether the liquid accumulator main body and the welding part of the air inlet pipe and the air outlet pipe and the main body have leakage phenomena.
(10) And (6) packaging, namely packaging qualified good products.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.