KR20060021950A - Electric beam machine for welding hollow piston of compressor - Google Patents

Abstract

The present invention relates to a compressor piston electron beam welding device used to weld join two parts for a separately manufactured air conditioner compressor piston.

Compressor piston electron beam welding apparatus according to the present invention comprises: an electron beam welding machine (1) for projecting and welding the electron beam to the junction of the piston in the vacuum-sealed welding chamber (10a); At least one rotary jig (2) rotated in the welding chamber (10a) in a state in which a plurality of pistons are arranged in the circumferential direction so that electron beam welding is sequentially performed for each piston; And a jig transfer means (3) for transferring the rotary jig (2) to sequentially pass through the welding chamber (10a), including a plurality of carried in the welding chamber (10a) by the rotary jig (2). It is characterized in that it is configured to collectively weld to the pistons, such a compressor piston electron beam welding device, it is necessary for the piston welding because it is possible to collectively weld a plurality of pistons in a certain quantity unit each time the vacuum chamber once A significant time savings can greatly contribute to increasing the productivity of the compressor pistons.

Compressor, Piston, Electron Beam, Welding, Bonding, Jig, Vacuum, Productivity

Description

Compressor Piston Electron Beam Welding System {ELECTRIC BEAM MACHINE FOR WELDING HOLLOW PISTON OF COMPRESSOR}             

1 is a side cross-sectional view of a swash plate compressor.

2 is an exploded perspective view of the compressor piston;

Figure 3 is a schematic cross-sectional view of a compressor piston electron beam welding apparatus according to an embodiment of the present invention.

Figure 4 is a front sectional schematic view of the compressor piston electron beam welding apparatus according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: electron beam welding machine 10: case

11: vacuum pump 12: electron gun

2: rotating jig 20: upper clamp

21: lower clamp 22, 23: chuck

3: rotary jig 30: hydraulic cylinder                 

100: piston 100a: bridge portion

100b: head part

The present invention relates to a compressor piston electron beam welding device used to join two separately manufactured parts by welding in the manufacture of a piston for an air conditioner compressor, in particular, by collectively welding a plurality of pistons in a certain quantity unit every welding process The present invention relates to a compressor piston electron beam welding device that can significantly reduce the time required for piston welding.

The compressor constituting the air conditioner of the automobile is selectively received by the power of the engine delivered through the pulley by the intermittent action of the electronic clutch to compress the refrigerant in the gaseous phase supplied from the evaporator to a state of high temperature and high pressure that is easy to liquefy and condenser It is a device to discharge.

In the swash plate type compressor, which is a form of such a compressor, a disk-shaped swash plate inclined to the drive shaft receiving engine power is rotated by the drive shaft, and a shoe is formed along the circumference of the swash plate. Through a plurality of pistons coupled via the linear reciprocating motion by the rotation of the swash plate in the plurality of bores formed in the cylinder, the refrigerant sucks and compresses the gas to be discharged toward the condenser.

1 is a cross-sectional view of a variable displacement swash plate compressor.

As shown, the variable displacement swash plate compressor includes front and rear housings 51 and 52 which form a closed space such as a crank chamber 51a, a suction chamber 52a, a discharge chamber 52b, and the like; A cylinder block 53 embedded between the front and rear housings 51 and 52 and configured to have a plurality of bores 53a arranged in the circumferential direction; A drive shaft 54 inserted into the crank chamber 51a through the center of the front housing 51 and rotatably supported at the center of the cylinder block 53; A lug plate 55 coupled to the drive shaft 54 in the crank chamber 51a and rotated by the drive shaft 54; A swash plate 56 that is inserted into a drive shaft 54 and hinged to the lug plate 55 to rotate while being rotated together with the lug plate 55; A plurality of pistons 58 coupled to each other via the shoe 57 around the swash plate 56 and reciprocating in each bore 53a of the cylinder block 53 by swinging the swash plate 56; In addition, between the cylinder block 53 and the rear housing 52, the intake and exhaust lead valves 59 and 60 which control the intake and discharge of the refrigerant gas by the pressure change in the bore according to the reciprocation of the piston 58 are provided. It is made to include. In addition, the control valve 61 for adjusting the feed amount of the piston 58 by adjusting the pressure of the crank chamber 51a, the suction chamber 52a and the discharge chamber 52b, the lug plate 55 and the swash plate ( The swash plate support spring 63 is elastically installed between the 56 to elastically support the swash plate 56 at the minimum inclination angle when the lug plate 55 is not rotated.

According to such a configuration, the variable displacement swash plate compressor operates as follows to compress the refrigerant transferred from the evaporator and discharge it to the condenser.

When the drive shaft 54 is rotated by the engine power, the pistons 58 coupled around the swash plate 56 due to the fluctuation of the swash plate 56 rotated together with the lug plate 55 are bores 53a of the cylinder block 53. It will reciprocate within. By this piston reciprocating, the compressor enters the refrigerant in the suction chamber 52a into the bore 53a while the piston 58 moves back toward the crank chamber 51a, and the bore 53a while the piston 58 moves forward. The refrigerant flowed into the ()) is compressed by the pressure of the piston 58 for advancing and discharged to the refrigerant flow path connected to the condenser through the discharge chamber 52b.

In the refrigerant compression process of the compressor, the piston 58 acts as an inertial force proportional to its weight in the reciprocating direction in the opposite direction to the movement direction, thereby lowering the rotational force of the drive shaft 54. Has a profound effect on In consideration of this point, the piston of the compressor is made of a lightweight material in order to reduce inertia, and in recent years, a hollower weight piston has been developed and applied to a variable displacement compressor.

Hollow piston 100 (58 in FIG. 1) for the compressor reciprocates along the bore (53a in FIG. 1) and the bridge portion 100a coupled to the swash plate (56 in FIG. 1) as shown in FIG. It consists of a hollow cylindrical head portion (100b) for varying the pressure in the bore (53a), usually formed separately and then integrated through electron beam welding after machining and the like.                         

In the compressor piston manufacturing process, the electron beam welding process of welding the bridge portion 100a and the head portion 100b and integrating them is generally performed in a vacuum welding chamber. Since the decompression process to make the interior vacuum is essential, the process time is relatively long compared to other processes before and after.

Nevertheless, the conventional compressor piston electron beam welding apparatus, which is used in the conventional compressor piston electron beam welding process, is configured to exhaust the air in the welding chamber every time the piston is transported one by one to make a vacuum and then weld the piston. The time required was too long to be a major factor in significantly reducing the productivity of compressor pistons.

For example, in the case of the piston manufacturing apparatus for a compressor of Korean Patent Laid-Open No. 2000-57978, the piston 51 is moved to the table 62 whenever the piston 51 placed in the cassette jig (Publication Code 48) is transferred. Lifting the inside of the welding chamber 45 and then taking out the air in the welding chamber 45 with the exhaust pump 46 to make it vacuum, and then welding was carried out. Because the process and the vacuum exhaust process to discharge the air in the welding chamber to make a vacuum state is required because the time required for welding is too long, the productivity of the compressor piston manufacturing line significantly reduced.

Accordingly, the present invention has been made in order to solve the problems of the conventional compressor piston electron beam welding apparatus as described above, transfer the pistons to the welding chamber in a predetermined quantity unit and then exhaust the air in the welding chamber to make a vacuum state It is an object of the present invention to provide a compressor piston electron beam welding device that can significantly increase the productivity of the piston by significantly reducing the time required for welding the piston by collectively welding the plurality of pistons.

Compressor piston electron beam welding apparatus according to the present invention, an electron beam welding machine for welding by welding the electron beam to the joint of the piston in the vacuum-sealed welding chamber; At least one rotating jig rotated in the welding chamber in a state in which a plurality of pistons are arranged in a circumferential direction to allow electron beam welding to be sequentially performed for each piston; And jig conveying means for conveying the rotary jigs to sequentially pass through the welding chamber. The method may include collectively welding a plurality of pistons brought into the welding chamber by the rotary jig.

In the above configuration, it is preferable that the jig transfer means is an index table which rotates in a state in which the plurality of rotary jigs are arranged and fixed in the circumferential direction so that each rotary jig sequentially passes through the welding chamber.                     

Further, according to a preferred configuration, the rotary jig is configured to rotate the respective pistons so that electron beam welding is performed around the respective pistons, and an index table is provided for the respective rotary papers with respect to the welding chamber disposed on the index table. And lifting means for lifting them in and out of the welding chamber.

The rotary jig fixes the pistons between the upper clamp and the lower clamp, and is lifted by the elevating means to seal the lower part of the case where the lower clamp is disposed on the rotary jig and seal the weld chamber sealed in the case. It is configured to be formed.

Hereinafter, the configuration and operation of the compressor piston electron beam welding apparatus according to the present invention will be described in detail through a preferred embodiment.

2 is an exploded perspective view of the compressor piston. 2 is a schematic plan view of the compressor piston electron beam welding apparatus according to an embodiment of the present invention, Figure 3 is a side schematic view.

Compressor piston electron beam welding apparatus according to an embodiment of the present invention, as shown in Figure 2, after separately formed and integrated with each other to form a piston 100, the bridge portion (100a) and the head portion (100b) electron beam As shown in FIGS. 3 and 4, the case 10 forming the welding chamber 10a and the vacuum pump 12 for discharging air inside the case 10 to form a vacuum state are welded together. Electron beam welding machine (1) consisting of an electron gun 12 for projecting an electron beam to the piston (100) in the welding chamber (10a), removable by arranging the plurality of pistons 100 in the circumferential direction under the case (10) Two rotary jigs (2) for sequentially feeding the pistons (100) in the circumferential direction while being rotated by a predetermined angle with respect to the center thereof, and a jig for transferring the rotary jig (2). Way As the rotary jig 2 is rotated two steps by 180 degrees while the rotary jig 2 is fixed on the same radius, one rotary jig 2 is carried in the welding chamber 10a and the other rotary jig 2 is the welding chamber 10a. It consists of an index table 3 which is taken out.

The electron beam welding machine (1) is to weld the two parts of the piston 100, namely the bridge portion (100a) and the head portion (100b) separately manufactured by projecting the electron beam to integrate, forming a welding chamber (10a) therein The case 10 and the case 10 consists of two electron guns 12 projecting an electron beam to the piston 100 in the welding chamber 10a. The case 10 is a hollow cylindrical body whose lower part is opened, the lower part of which is sealed by the lower clamp 21 of the rotary jig 2 which is lifted by the hydraulic cylinder 30 which is the lifting means. The vacuum welding chamber 10a is formed therein by pumping the vacuum pump 12 connected to the upper portion. The electron gun 12 projects and bonds an electron beam to the bridge portion and the head portion joining portion of each piston 100 in the welding chamber 10a and is provided on both sides of the case 10. Three or more electron guns 12 may be installed when it is necessary to shorten the welding time or to weld the piston 100 at least once.

The rotary jig 2 is a circular jig for temporarily fixing the preassembled piston 100 so that welding is accurately performed along the joint portion during the welding process for the preassembled piston 100 that is a welding object. A plurality of chucks arranged to correspond to each other in a circular shape on the lower clamps 20 and 21 and the upper and lower clamps 20 and 21 facing each other in a circular manner to grip and hold the protrusions 100c of the piston 100. 22, 23, and the upper and lower clamps (20, 21) is made up of the hydraulic cylinder 30, which is the lifting means for lifting into the case 10. The chucks 22 and 23 are configured to fix the piston 100 and to rotate at a constant angular speed, and the lower clamp 21 opens when the rotary jig 2 is lifted by the hydraulic cylinder 30. Is in close contact with the lower portion of the case 10 is configured to form a sealed welding chamber (10a) inside the case (10).

The index table 3 is a rotary table for transferring the rotating jig 2 fixed to the upper side while being rotated by 180 degrees to the electron beam welding machine 1 side, and the rotating jig 2 is transferred to the case 10 of the electron beam welding machine 1. And a hydraulic cylinder 30 capable of elevating the rotary jig 2 so that the lower clamp 21 is in close contact with the lower part of the case 10.

According to the configuration as described above the compressor piston electron beam welding apparatus according to an embodiment of the present invention can weld a large number of piston 100 in a short time through the following process.

When the pistons 100 are conveyed in the assembled state, the pistons 100 are rotated on the rotary jig 2 outside the welding chamber 10a by the chucks 22 and 23 of the upper and lower clamps 20 and 21. Is separably fixed. Subsequently, the rotary jig 2 is moved toward the case 10 of the electron beam welding machine 1 by the rotation of the index table 3, and then lifted by the hydraulic cylinder 30 to move the pistons 100 into the case 10. While being carried in, the lower clamp 21 is brought into close contact with the lower part of the case 10 to form a hermetically sealed welding chamber 10a in the case 10. When the sealed welding chamber 10a is formed, the vacuum pump 12 discharges air in the welding chamber 10a to make the welding chamber 10a in a vacuum state, and the electron gun 12 projects an electron beam in a vacuum state. The joint of the piston 100 is welded and joined. At this time, the pistons 100 are rotated at a constant speed by the chucks 22 and 23 so that welding is performed about the entire circumference thereof, and the rotary jig 2 is completed whenever welding to one piston 100 is completed. The electron gun 12 is rotated by an angle so that the next piston 100 can be welded. At this time, in the rotating jig 2 outside the welding chamber 10a, the operation of replacing the pistons 100 previously fixed in the state where welding is completed with the pistons 100 of the newly assembled temporary assembly is performed in the welding chamber. It proceeds simultaneously with the welding operation in (10a). When the welding work for the pistons 100 in the welding chamber 10a is completed, the rotary jig 2 is lowered by the hydraulic cylinder 30, and then the piston 100 is rotated as the index table 3 is rotated. Are returned to the initial position where they are detached. At the same time as the return, the other rotary jig 2 equipped with the new piston 100 is rotated to the case 10 side and then lifted by the hydraulic cylinder 30 to move the new pistons 100 into the case 10. At the same time, the new welding process for the newly transferred piston 100 is started while the sealed welding chamber 10a is formed.

Compressor piston electron beam welding apparatus according to an embodiment of the present invention for welding the piston 100 through the process as described above a certain amount of the piston (100) every time the vacuum chamber (10a) once vacuum as described above Since collective welding can be performed in units, the time required for welding the piston 100 can be greatly reduced.

As described above in detail, the compressor piston electron beam welding apparatus according to the present invention can collectively weld a plurality of pistons in a predetermined quantity unit every time the vacuum is welded to the welding chamber, thereby greatly reducing the time required for piston welding. . Therefore, when applying the compressor piston electron beam welding apparatus according to the present invention can increase the productivity of the compressor piston.

Claims (5)

An electron beam welding machine (1) which projects and welds an electron beam to the joint of the piston in the vacuum-sealed welding chamber (10a); At least one rotary jig (2) rotated in the welding chamber (10a) in a state in which a plurality of pistons are arranged in the circumferential direction so that electron beam welding is sequentially performed for each piston; And And jig transfer means (3) for transferring the rotary jig (2) to sequentially pass through the welding chamber (10a), including, Compressor piston electron beam welding device, characterized in that configured to collectively weld a plurality of pistons carried in the welding chamber (10a) by the rotary jig (2). The method of claim 1, The rotary jig (2) is a compressor piston electron beam welding device, characterized in that configured to rotatably fix each of the piston (100) so that electron beam welding is performed around the respective piston. The method of claim 2, The jig conveying means is an index table (3) for rotating the plurality of the rotating jig 2 in a state of being fixed in the circumferential direction so that each rotary jig (2) is sequentially passed through the welding chamber (10a). Compressor piston electron beam welding device. The method of claim 3, wherein The index table 3 is provided with elevating means 30 which is capable of lifting and lowering the respective rotary jigs 2 into and out of the welding chamber with respect to the welding chamber 10a disposed on the index table. Compressor piston electron beam welding device, characterized in that. The method of claim 4, wherein The rotary jig 2 fixes the pistons between the upper and lower clamps 20 and 21 and is lifted by the elevating means 30 so that the lower clamp 21 is disposed on the rotary jig 10. Compressor piston electron beam welding device, characterized in that configured to form a sealed welding chamber (10a) in the case while sealing the bottom of the.

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