CN114101451A

CN114101451A - Automatic stretch forming machine of steel exhaust pipe for air conditioner compressor

Info

Publication number: CN114101451A
Application number: CN202111226197.7A
Authority: CN
Inventors: 宣曙; 季海镛
Original assignee: Wuhu Younit Precision Manufacturing Co ltd
Current assignee: Wuhu Younit Precision Manufacturing Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-03-01
Anticipated expiration: 2041-10-21
Also published as: CN114101451B

Abstract

The invention provides an automatic stretching forming machine of a steel exhaust pipe for an air conditioner compressor, which comprises a linear module, a stretching forming device and supports, wherein the stretching forming device is arranged at the top end of the linear module; the stretching forming device comprises a conveying assembly and a processing assembly, wherein the conveying assembly is arranged at one end of the top of the linear module, the processing assembly is arranged at the other end of the top of the linear module, and the conveying assembly comprises two first conveying belts and a rotary conveying mechanism, the two first conveying belts are fixed on the upper surface of the support, and the rotary conveying mechanism is fixed on the upper surface of the linear module. The invention can stretch the exhaust pipe from the inside of the exhaust pipe and simultaneously keep the structure of the exhaust pipe from the outside, thereby reducing the damage of the exhaust pipe caused by stretching.

Description

Automatic stretch forming machine of steel exhaust pipe for air conditioner compressor

Technical Field

The invention mainly relates to the technical field of air condition compressors, in particular to an automatic stretch forming machine of a steel exhaust pipe for an air condition compressor.

Background

The air conditioner is equipment for manually adjusting and controlling parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure, an exhaust pipe cannot be separated during operation of an air conditioner compressor, and the exhaust pipe is usually required to be stretched and formed in the process of manufacturing the exhaust pipe so as to facilitate subsequent welding processing.

According to the patent document with the application number of CN201921949603.0, the synchronous stretch forming die for the exhaust pipe is known, which comprises an upper die holder and a lower die holder, wherein an upper padding plate is installed on the lower side of the upper die holder, a lower clamping plate is installed on the lower side of the upper padding plate, a stripper plate is installed on the lower side of the lower clamping plate, the upper die holder, the upper padding plate, the upper clamping plate and the stripper plate are connected through equal-height sleeves, and a forming punch and a stretch forming block are installed on the upper clamping plate; and the upper part of the lower die base is provided with a lower die plate matched with the forming punch and the stretching forming block. The synchronous stretch forming die for the exhaust pipe is characterized in that a forming punch and a stretch forming block are installed on the same die set, so that the effect of completing two processes of stretching and forming by using one die set is achieved, the working efficiency is improved, the cost is reduced, and the synchronous stretch forming die is convenient to maintain.

However, the above stretch forming apparatus still has a defect, for example, although the above stretch forming apparatus can achieve the effect of using one set of mold to complete two processes of stretching and forming, the conventional forming apparatus is difficult to effectively maintain the structure of the expansion portion of the exhaust pipe during the stretching process, which leads to easy cracking of the exhaust pipe, thereby reducing the yield of the exhaust pipe.

Disclosure of Invention

The invention mainly provides an automatic stretching forming machine of a steel exhaust pipe for an air conditioner compressor, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an automatic stretching forming machine of a steel exhaust pipe for an air conditioner compressor comprises a linear module, a stretching forming device arranged at the top end of the linear module, and supports arranged on two sides of the linear module;

the stretching forming device comprises a conveying assembly and a processing assembly, wherein the conveying assembly is arranged at one end of the top of the linear module, the processing assembly is arranged at the other end of the top of the linear module, and the conveying assembly comprises first conveying belts fixed on the upper surfaces of the two supports and a rotary conveying mechanism fixed on the upper surface of the linear module;

the processing assembly comprises an expansion mechanism fixed on the upper surface of one end, far away from the rotary conveying mechanism, of the linear module, a rack connected with the execution end of the linear module, and a lifting mechanism arranged at the top end of the rack, wherein the execution end of the lifting mechanism is connected with a clamping mechanism;

the clamping mechanism comprises first air cylinders, pressurizing maintaining blocks and arc-shaped clamping grooves, wherein the first air cylinders are connected with the execution end of the lifting mechanism and are symmetrically arranged, the pressurizing maintaining blocks are arranged at one ends, close to each other, of piston rods of the first air cylinders, and the arc-shaped clamping grooves are arranged at one side surfaces, close to each other, of the pressurizing maintaining blocks.

Furthermore, gyration conveying mechanism is including being fixed in the quick-witted case of sharp module upper surface is fixed in the motor of machine case side surface is fixed in the motor output shaft extends to the first connecting rod of quick-witted incasement portion one end surface, and through the bearing with first connecting rod rotates the gyration box of connecting, the one end that first connecting rod was kept away from to the gyration box is rotated through the bearing and is connected with two second connecting rods, the one end that the gyration box was kept away from to the second connecting rod through the pivot with quick-witted case rotates and is connected, follows the gyration of gyration box through the second connecting rod and revolve to when making the second connecting rod adapt to the gyration of gyration box, provide the support for the gyration box.

Further, gyration conveying mechanism still including being fixed in proper order the inside arc bearing piece of gyration box, it is a plurality of all the embedding has the negative pressure suction head on the casing of arc bearing piece, and the air pump is connected with the negative pressure suction head through the hose to when breathing in through the negative pressure suction head, hold the blast pipe, prevent that the blast pipe from removing.

Furthermore, elevating system is including embedding in frame top, and the second cylinder that the symmetry set up, and be fixed in the backup pad of second cylinder piston rod upper surface, the backup pad is fixed in the lower surface of first cylinder adjusts the pressurization on the first cylinder and maintains the piece, makes it and blast pipe be in a horizontal plane to supplementary blast pipe's processing, and the pressurization maintains the piece and descends when need not to stretch the blast pipe, prevents that protruding pressurization from maintaining the removal that the piece influences the blast pipe after the processing.

Further, dilatation mechanism is including being fixed in the supporting seat of straight line module upper surface to and be fixed in the supporting seat and be close to the dilatation post of a side surface of frame, support for the dilatation post through the supporting seat, fill in the inside of pending blast pipe through the dilatation post, in order to enlarge the internal diameter of this blast pipe, accomplish the stretch forming work of blast pipe.

Furthermore, fixture still include a plurality of interlude in add pressure on maintaining the piece casing and keeping the head of giving vent to anger, it is a plurality of the head of giving vent to anger encircles the axis setting of arc centre gripping groove, keep giving vent to anger through the pressurization of the inside head of giving vent to anger of piece, thereby utilize high-pressure air to promote the blast pipe, thereby the cooperation contains the post from the outside and the inside of blast pipe, in order to maintain the structure of blast pipe.

Further, fixture is still including being fixed in the incomplete rubber ring at arc centre gripping groove cell body inner wall both ends, the inner ring surface embedding of incomplete rubber ring has a plurality of balls, through the roll of ball at the surface of blast pipe to prevent to produce dry friction between incomplete rubber ring and the blast pipe.

Furthermore, the pressurizing and maintaining block is of a hollow structure, an air inlet is fixed on the upper surface of the pressurizing and maintaining block, and the pressurizing and maintaining block generates negative pressure through the vicinity of the air inlet, so that the negative pressure is generated inside the two combined pressurizing and maintaining blocks, and the gap between the two pressurizing and maintaining blocks is further reduced.

Further, the piece is kept away from one side of first conveyer belt to the pressurization and is equipped with the roughness and detects the piece, the roughness detects the piece and corresponds with same one side the pressurization is kept being connected with the spliced pole between the piece, two the pressurization is kept a side surface that the piece is close to each other and is equipped with the recess that supplies the blast pipe to alternate, the pressurization is kept being fixed with a plurality of ultrasonic ranging appearance on the casing of piece, and the signal of telecommunication transmission that ultrasonic ranging appearance's communication end will have this distance information reaches the PLC controller rather than being connected to supply the data before the PLC control contrast processing and after the processing, obtain the blast pipe judgement whether unusual.

Furthermore, one side of the support is provided with two pressure-bearing frames fixed on the ground, a second conveying belt is fixed on the upper surface of each pressure-bearing frame, and the processed exhaust pipe is conveyed through the second conveying belt on the pressure-bearing frames.

Compared with the prior art, the invention has the beneficial effects that:

first, the present invention can stretch the exhaust pipe from the inside of the exhaust pipe and simultaneously maintain the structure of the exhaust pipe from the outside, and reduce the damage of the exhaust pipe caused by stretching, specifically: the exhaust pipe is pushed by high-pressure air, so that the expansion column is matched with the outside and the inside of the exhaust pipe to maintain the structure of the exhaust pipe.

Secondly, the exhaust pipe can be temporarily fixed under the condition that the feeding and the discharging of the exhaust pipe are not influenced, so that the exhaust pipe is aligned to the expansion column to be stretched, and the method specifically comprises the following steps: the rotating box drives the arc-shaped bearing block used for lifting the exhaust pipe in the rotating box to rotate up and down, the arc-shaped bearing block drives the exhaust pipe to move between the two pressurizing maintaining blocks, and in the process, when the negative pressure suction head in the arc-shaped bearing block sucks air, negative pressure is generated between the exhaust pipe and the negative pressure suction head, so that the exhaust pipe is sucked, and the exhaust pipe is fixed temporarily.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an isometric view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a front view of the present invention;

FIG. 6 is an isometric view of a tooling assembly of the present invention;

FIG. 7 is an enlarged view of the structure of region A in FIG. 3;

fig. 8 is an enlarged view of the structure of region a in fig. 4.

In the figure: 10. a linear module; 20. a stretch-forming device; 21. a delivery assembly; 211. a first conveyor belt; 212. a rotary conveying mechanism; 2121. a chassis; 2122. a motor; 2123. a first link; 2124. rotating the box; 2125. a second link; 2126. an arc-shaped bearing block; 2127. a negative pressure suction head; 22. processing the assembly; 221. an expansion mechanism; 2211. a supporting seat; 2212. a capacitance-expanding column; 222. a frame; 223. a lifting mechanism; 2231. a second cylinder; 2232. a support plate; 224. a clamping mechanism; 2241. a first cylinder; 2242. a pressurization maintaining block; 2243. an arc-shaped clamping groove; 2244. pressurizing to form an air outlet; 2245. a defective rubber ring; 2246. a ball bearing; 2247. a flatness detection block; 2248. connecting columns; 2249. an air suction port; 224a, an ultrasonic range finder; 30. a support; 40. a pressure bearing frame; 41. a second conveyor belt.

Detailed Description

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In an embodiment, referring to fig. 1 to 8, an automatic stretch forming machine for a steel exhaust pipe of an air conditioner compressor includes a linear module 10, a stretch forming device 20 disposed at a top end of the linear module 10, and brackets 30 disposed at two sides of the linear module 10;

the stretch forming device 20 comprises a conveying assembly 21 arranged at one end of the top of the linear module 10 and a processing assembly 22 arranged at the other end of the top of the linear module 10, wherein the conveying assembly 21 comprises a first conveying belt 211 fixed on the upper surfaces of the two brackets 30 and a rotary conveying mechanism 212 fixed on the upper surface of the linear module 10;

the processing assembly 22 comprises an expansion mechanism 221 fixed on the upper surface of one end of the linear module 10 far away from the rotary conveying mechanism 212, a frame 222 connected with the execution end of the linear module 10, and a lifting mechanism 223 arranged at the top end of the frame 222, wherein the execution end of the lifting mechanism 223 is connected with a clamping mechanism 224;

the clamping mechanism 224 comprises first air cylinders 2241 which are connected with the execution end of the lifting mechanism 223 and are symmetrically arranged, pressurizing maintaining blocks 2242 which are arranged at one ends, close to each other, of piston rods of the two first air cylinders 2241, and arc-shaped clamping grooves 2243 which are arranged at one side surfaces, close to each other, of the two pressurizing maintaining blocks 2242;

specifically, please refer to fig. 2, 3 and 7 again, the rotary conveying mechanism 212 includes a housing 2121 fixed on the upper surface of the linear module 10, a motor 2122 fixed on a side surface of the housing 2121, a first connecting rod 2123 fixed on an output shaft of the motor 2122 and extending to an outer surface of one end inside the housing 2121, and a rotary box 2124 rotatably connected to the first connecting rod 2123 through a bearing, one end of the rotary box 2124 away from the first connecting rod 2123 is rotatably connected to two second connecting rods 2125 through bearings, one end of the second connecting rod 2125 away from the rotary box 2124 is rotatably connected to the housing 2121 through a rotating shaft, the rotary conveying mechanism 212 further includes an arc-shaped pressure-bearing block 2126 sequentially fixed inside the rotary box 2124, and a negative pressure suction head 2127 is embedded in a housing of the arc-shaped pressure-bearing blocks 2126;

it should be noted that, in this embodiment, when the output shaft of the motor 2122 drives the first connecting rod 2123 thereon to rotate, the first connecting rod 2123 drives the rotating box 2124 to rotate up and down to change the position of the arc-shaped pressure-bearing block 2126 inside the rotating box 2124, and the second connecting rod 2125 rotates along with the rotation of the rotating box 2124 to make the second connecting rod 2125 adapt to the rotation of the rotating box 2124 and provide support for the rotating box 2124;

further, the arc-shaped inner wall of the arc-shaped bearing block 2126 is adapted to the outer surface of the exhaust pipe, so that the arc-shaped bearing block 2126 provides a support for the exhaust pipe, and the air pump is connected to the negative pressure suction head 2127 through a hose to suck the exhaust pipe when the negative pressure suction head 2127 sucks air, thereby preventing the exhaust pipe from moving.

Specifically, please refer to fig. 2, 4 and 8 again, the lifting mechanism 223 includes a second cylinder 2231 embedded in the top end of the frame 222 and symmetrically disposed, and a supporting plate 2232 fixed on the upper surface of the piston rod of the second cylinder 2231, the supporting plate 2232 is fixed on the lower surface of the first cylinder 2241, the expansion mechanism 221 includes a supporting seat 2211 fixed on the upper surface of the linear module 10, and an expansion column 2212 fixed on a side surface of the supporting seat 2211 close to the frame 222;

in this embodiment, the support plate 2232 is pushed by the second cylinder 2231 to move up and down, and the support plate 2232 drives the first cylinder 2241 to move up and down, so that when the exhaust pipe needs to be stretched, the pressure maintaining block 2242 on the first cylinder 2241 is adjusted to be located on the same horizontal plane as the exhaust pipe to assist in the machining of the exhaust pipe, and the pressure maintaining block 2242 is not lowered when the exhaust pipe does not need to be stretched, so as to prevent the protruding pressure maintaining block 2242 from affecting the movement of the machined exhaust pipe;

further, the support 2211 provides support for the expansion column 2212, and the expansion column 2212 is plugged into the exhaust pipe to be treated, so that the inner diameter of the exhaust pipe is enlarged, and the stretching forming work of the exhaust pipe is completed.

Specifically, please refer to fig. 2, 6 and 8 with great emphasis, the clamping mechanism 224 further includes a plurality of pressurization gas outlet heads 2244 inserted into the casing of the pressurization maintaining block 2242, the pressurization gas outlet heads 2244 surround the axis of the arc-shaped clamping groove 2243, the clamping mechanism 224 further includes a stub rubber ring 2245 fixed at two ends of the inner wall of the arc-shaped clamping groove 2243, a plurality of balls 2246 are embedded into the inner ring surface of the stub rubber ring 2245, the pressurization maintaining block 2242 is a hollow structure, a gas inlet 2249 is fixed on the upper surface of the pressurization maintaining block 2242, a flatness detecting block 2247 is arranged on one side of the pressurization maintaining block 2242 far from the first conveying belt 211, the flatness detecting block 2247 corresponds to the same side, a connecting column 2248 is connected between the pressurization maintaining blocks 2242, two grooves for providing exhaust pipes are arranged on one side surface of the pressurization maintaining block 2242 which is inserted into each other, a plurality of ultrasonic distance measuring instruments 224a are fixed on the housing of the pressurizing and maintaining block 2242, two pressure-bearing frames 40 fixed on the ground are arranged on one side of the support 30, and a second conveying belt 41 is fixed on the upper surface of each pressure-bearing frame 40;

it should be noted that, in this embodiment, the pressurization gas outlet head 2244 is connected with the air pump through a hose, so that the two pressurization maintaining blocks 2242 are combined, and when the exhaust pipe is inserted into the arc-shaped holding groove 2243 of the pressurization maintaining block 2242, the pressurization gas outlet head 2244 inside the pressurization maintaining block 2242 is used for discharging gas, so that the exhaust pipe is pushed by high-pressure air, and the structure of the exhaust pipe is maintained by matching with the expansion column 2212 from the outside and the inside of the exhaust pipe;

further, the gap between the arc-shaped holding groove 2243 and the exhaust pipe is reduced by the combined incomplete rubber ring 2245, so that the high-pressure gas inside the pressurization maintaining block 2242 is prevented from leaking, and the incomplete rubber ring 2245 and the exhaust pipe are prevented from generating dry friction by rolling the balls 2246 on the outer surface of the exhaust pipe;

furthermore, the air inlet 2249 is connected with the air pump through a hose, and the pressurizing and maintaining block 2242 generates negative pressure through the vicinity of the air inlet 2249, so that negative pressure is generated inside the two combined pressurizing and maintaining blocks 2242, and the gap between the two pressurizing and maintaining blocks 2242 is further reduced;

further, the ultrasonic distance meter 224a inserted in the flatness detection block 2247 is used for detecting the distance between the outer surface of the processed exhaust pipe and the distance measurement end of the ultrasonic distance meter 224a, so that the communication end of the ultrasonic distance meter 224a transmits an electric signal with the distance information to the PLC controller connected therewith, and the PLC controller compares the data before and after processing to obtain the judgment on whether the exhaust pipe is abnormal;

further, the processed exhaust pipe is conveyed by the second conveyor belt 41 on the pressure receiving frame 40.

The specific operation mode of the invention is as follows:

when the exhaust pipe is processed by using the stretch forming apparatus, the exhaust pipe to be processed is conveyed by the first conveyor belt 211 on the support 30 until the exhaust pipe moves above the rotary conveying mechanism 212, when the first link 2123 on the exhaust pipe is driven to rotate by the output shaft of the motor 2122, the first link 2123 drives the rotary box 2124 to rotate up and down, the rotary box 2124 drives the arc-shaped bearing block 2126 for lifting the exhaust pipe therein to rotate up and down, the arc-shaped bearing block 2126 drives the exhaust pipe to move between the two pressure maintaining blocks 2242, during this process, when the negative pressure suction head 2127 in the arc-shaped bearing block 2126 sucks air, a negative pressure is generated between the exhaust pipe and the negative pressure suction head 2127, thereby sucking the exhaust pipe, temporarily fixing the exhaust pipe to prevent the exhaust pipe from moving, the piston rod of the first cylinder 2241 drives the two pressure maintaining blocks 2242 to approach each other and clamp the exhaust pipe, the rack 222 at the bottom end of the pressure maintaining block 2242 is driven to move by the linear module 10, so that the expansion column 2212 in the expansion mechanism 221 slowly extends into the exhaust pipe to stretch the exhaust pipe, in the process, the exhaust pipe is exhausted through the pressurization gas outlet head 2244 in the pressurization maintaining block 2242, so that the exhaust pipe is pushed by high-pressure air, and the structure of the exhaust pipe is maintained from the outside and the inside of the exhaust pipe by matching with the expansion column 2212;

through the ultrasonic ranging instrument 224a that alternates on roughness detection block 2247 to detect the distance of the surface of the blast pipe after processing and ultrasonic ranging instrument 224 a's range finding end, so that the communication end of ultrasonic ranging instrument 224a will have this distance information's signal of telecommunication transmission to the PLC controller rather than being connected, in order to supply PLC control contrast before the processing and the data after the processing, obtain the judgement whether unusual of blast pipe, carry the blast pipe after the processing through second conveyer belt 41 on the bearing frame 40 at last.

The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. An automatic stretching forming machine for a steel exhaust pipe for an air conditioner compressor is characterized by comprising a linear module (10), a stretching forming device (20) arranged at the top end of the linear module (10), and supports (30) arranged at two sides of the linear module (10);

the stretching forming device (20) comprises a conveying assembly (21) arranged at one end of the top of the linear module (10) and a processing assembly (22) arranged at the other end of the top of the linear module (10), wherein the conveying assembly (21) comprises first conveying belts (211) fixed on the upper surfaces of the two supports (30) and a rotary conveying mechanism (212) fixed on the upper surface of the linear module (10);

the processing assembly (22) comprises an expansion mechanism (221) fixed on the upper surface of one end, far away from the rotary conveying mechanism (212), of the linear module (10), a rack (222) connected with the execution end of the linear module (10), and a lifting mechanism (223) arranged at the top end of the rack (222), wherein the execution end of the lifting mechanism (223) is connected with a clamping mechanism (224);

fixture (224) include with actuating end of elevating system (223) is connected, and first cylinder (2241) that the symmetry set up, locate two piece the pressurization of the one end that the piston rod of first cylinder (2241) is close to each other maintains piece (2242), and locate two the pressurization maintains arc centre gripping groove (2243) of a side surface that piece (2242) are close to each other.

2. The automatic stretch forming machine of a steel exhaust pipe for an air conditioner compressor according to claim 1, wherein the rotary transfer mechanism (212) comprises a housing (2121) fixed to an upper surface of the linear module (10), a motor (2122) fixed to one side surface of the housing (2121), a first connecting rod (2123) fixed to an output shaft of the motor (2122) and extending to an outer surface of one end of an inner portion of the housing (2121), and a rotary box (2124) rotatably connected to the first connecting rod (2123) through a bearing, wherein one end of the rotary box (2124) away from the first connecting rod (2123) is rotatably connected to two second connecting rods (2125) through bearings, and one end of the second connecting rod (2125) away from the rotary box (2124) is rotatably connected to the housing (2121) through a rotating shaft.

3. The automatic stretch forming machine of a steel exhaust pipe for an air conditioner compressor according to claim 2, wherein the rotary conveying mechanism (212) further comprises arc-shaped bearing blocks (2126) sequentially fixed inside the rotary box (2124), and a negative pressure suction head (2127) is embedded in a housing of each of the arc-shaped bearing blocks (2126).

4. The automatic stretch-forming machine of a steel exhaust pipe for an air conditioner compressor as claimed in claim 1, wherein said lifting mechanism (223) comprises a second cylinder (2231) embedded in the top end of said frame (222) and symmetrically disposed, and a support plate (2232) fixed to the upper surface of the piston rod of said second cylinder (2231), said support plate (2232) being fixed to the lower surface of said first cylinder (2241).

5. The automatic stretch-forming machine of a steel exhaust pipe for an air conditioner compressor according to claim 1, wherein the expansion mechanism (221) comprises a support base (2211) fixed to an upper surface of the linear module (10), and an expansion column (2212) fixed to a side surface of the support base (2211) close to the frame (222).

6. The automatic stretch-forming machine of a steel discharge pipe for an air conditioner compressor as claimed in claim 1, wherein said holding means (224) further comprises a plurality of pressurizing and gas-discharging heads (2244) inserted through a housing of said pressurizing and maintaining block (2242), said plurality of pressurizing and gas-discharging heads (2244) being disposed around an axis of said arc-shaped holding groove (2243).

7. The automatic stretch forming machine of a steel exhaust pipe for an air conditioner compressor as claimed in claim 1, wherein the clamping mechanism (224) further comprises a stub rubber ring (2245) fixed at both ends of the inner wall of the arc-shaped clamping groove (2243), and a plurality of balls (2246) are embedded in the inner ring surface of the stub rubber ring (2245).

8. The automatic stretch forming machine of a steel discharge pipe for an air conditioner compressor as claimed in claim 1, wherein said pressure maintaining block (2242) has a hollow structure, and an air inlet (2249) is fixed to an upper surface of said pressure maintaining block (2242).

9. The automatic stretch forming machine of a steel exhaust pipe for an air conditioner compressor according to claim 1, wherein a flatness detection block (2247) is arranged on one side, away from the first conveyor belt (211), of the pressurizing maintenance block (2242), the flatness detection block (2247) corresponds to the same side, a connecting column (2248) is connected between the pressurizing maintenance blocks (2242), a groove for inserting the exhaust pipe is formed in one side surface, close to each other, of the pressurizing maintenance blocks (2242), and a plurality of ultrasonic distance meters (224a) are fixed on a shell of the pressurizing maintenance block (2242).

10. The automatic stretch forming machine of a steel exhaust pipe for an air conditioner compressor as claimed in claim 1, wherein one side of the bracket (30) is provided with two pressure-bearing frames (40) fixed to the ground, and a second conveyor belt (41) is fixed to the upper surface of the pressure-bearing frames (40).