CN113334080A

CN113334080A - Combined machining equipment for hydraulic oil cylinder

Info

Publication number: CN113334080A
Application number: CN202110812644.0A
Authority: CN
Inventors: 雷俊; 杨继; 黄循伟; 王�锋
Original assignee: Hubei Jiaheng Technology Co ltd
Current assignee: Hubei Jiaheng Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-09-03

Abstract

The invention discloses combined machining equipment of a hydraulic oil cylinder, which comprises a first lathe, a second lathe, a double-head lathe, a first automatic conveying device, a second automatic conveying device, a first welding device and a second welding device, wherein the first lathe is arranged on the upper portion of the double-head lathe; the first lathe, the second lathe and the double-head lathe are arranged on one side of the first automatic conveying device and one side of the second automatic conveying device at intervals in rows, the first welding device and the second welding device are arranged on the other side of the first automatic conveying device and the other side of the second automatic conveying device at intervals in rows, the first automatic conveying device, the second automatic conveying device and the third automatic conveying device are controlled to run through the controller, the first automatic conveying device, the second automatic conveying device and the third automatic conveying device are automatically conveyed to the machining process equipment, machining is finished in a mode that workpieces are conveyed manually and matched with the machining process equipment, production efficiency is improved, labor cost is reduced, and automation degree is high.

Description

Combined machining equipment for hydraulic oil cylinder

Technical Field

The invention relates to the technical field of hydraulic cylinder processing equipment, in particular to combined processing equipment of a hydraulic cylinder.

Background

At present, the combined machining of a piston rod and a cylinder barrel of the sleeve type hydraulic oil cylinder is mainly in a special mode, the machining cost is high, the field operation is complex, the welding and machining efficiency is low, and the labor intensity is high; fatigue processing, quality accidents, etc. may occur over time.

In view of the foregoing, there is a need for a new hydraulic ram cluster tool that overcomes the above-mentioned deficiencies.

Disclosure of Invention

The invention aims to provide combined machining equipment of a hydraulic cylinder, wherein a controller is used for controlling a first automatic conveying device, a second automatic conveying device and a third automatic conveying device to operate in the whole process, so that the first automatic conveying device, the second automatic conveying device and the third automatic conveying device are automatically conveyed to machining process equipment, a mode of manually conveying workpieces to match with the machining process equipment is not needed any more for completing machining, the production efficiency is improved, the labor cost is reduced, and the automation degree is high.

In order to achieve the above object, the present invention provides a combined machining apparatus for a hydraulic cylinder, including a first lathe, a second lathe, a double-headed lathe, a first automatic conveying device, a second automatic conveying device, a first welding device, and a second welding device; the first lathe, the second lathe and the double-head lathe are arranged at one side of the first automatic conveying device and the second automatic conveying device at intervals in rows, the first welding device and the second welding device are arranged at the other side of the first automatic conveying device and the second automatic conveying device at intervals in rows,

first automatic handling device is used for removing the cylinder of treating processing to first lathe, second lathe and first welding set on, first lathe is used for the blanking cover cooperation hole of finish turning cylinder, and the second lathe is used for finish turning piston rod head cooperation hole, first welding set is used for advancing piston rod head top in the cylinder and welds, second automatic handling device is used for removing the cylinder after first welding set welding to second welding set on and can remove the cylinder after second welding set welding to double-end lathe on, second welding set is used for welding the blanking cover on the cylinder, double-end lathe is used for beating piston rod head centre bore and finish turning hole chamfer on the cylinder.

Preferably, the first automatic handling device includes a first slide rail and a first six-axis joint robot, the first lathe, the second lathe and the double-end lathe are arranged at one side of the first slide rail at intervals in rows, the first welding device and the second welding device are arranged at the other side of the first slide rail at intervals in rows, the first six-axis joint robot is connected to the first slide rail in a sliding manner, and the first six-axis joint robot can move on the first slide rail and move the cylinder barrel to the first lathe, the second lathe and the first welding device.

Preferably, the second automatic handling device includes a second slide rail and a second six-axis joint robot, the first lathe, the second lathe and the double-end lathe are arranged at one side of the second slide rail at intervals in rows, the first welding device and the second welding device are arranged at the other side of the second slide rail at intervals in rows, the second slide rail is connected with the first slide rail, the second six-axis joint robot is connected to the second slide rail in a sliding manner, and the second six-axis joint robot can move on the second slide rail and move the welded cylinder barrel to the double-end lathe.

Preferably, the first welding device comprises a first truss, a first manipulator connected to the first truss in a sliding manner, a first chuck assembly mounted below the first truss, and a first welding gun arranged adjacent to the first chuck assembly; the first manipulator can slide on the first truss to grab and place the piston rod head on the first chuck assembly.

Preferably, the first chuck assembly comprises a base and two first chucks arranged on the base at intervals; two first chucks are used for clamping the cylinder barrel, and one of the first chucks can move on the base.

Preferably, the first welding device further comprises a heating device, wherein the heating device is adjacent to the first chuck assembly and is provided with a heating ring.

Preferably, the second welding device comprises a second truss, a second manipulator, a clamping assembly, a second chuck assembly and a second welding gun; the second manipulator is connected to the second truss in a sliding mode, the clamping assembly is arranged adjacent to the second truss, the second chuck assembly is arranged adjacent to the clamping assembly, and the second welding gun is arranged adjacent to the clamping assembly and located above the clamping assembly.

Preferably, the clamping assembly comprises a mounting seat and a clamping jaw arranged on the mounting seat and positioned above the second chuck assembly, and the clamping jaw is used for clamping the cylinder barrel.

Preferably, the automatic loading and unloading device further comprises a loading frame, a third lathe and a third automatic conveying device; the feeding frame is arranged between the third lathe and the double-end lathe, and the third automatic conveying device and the third lathe are arranged at intervals and adjacent to each other.

Preferably, the welding device further comprises a material placing table, and the material placing table is arranged adjacent to the first welding device and the second welding device.

Compared with the prior art, the combined machining equipment for the hydraulic oil cylinder has the beneficial effects that: the first automatic handling device and the second automatic handling device are arranged at the adjacent positions of the first lathe, the second lathe and the double-end lathe, the third lathe is arranged at the adjacent position of the third lathe, the first automatic handling device, the second automatic handling device and the third automatic handling device are automatically controlled to operate in the whole process, so that the first automatic handling device, the second automatic handling device and the third automatic handling device are automatically conveyed to the processing process equipment, the manual work for carrying the workpiece to complete the processing in a manner of being matched with the processing process equipment is not needed, the production efficiency is improved, the labor cost is reduced, and the automation degree is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a first part of a combined machining device of a hydraulic oil cylinder provided by the invention.

Fig. 2 is a schematic structural diagram of a second part of the combined processing equipment of the hydraulic oil cylinder provided by the invention.

Fig. 3 is a perspective view of the first welding apparatus shown in fig. 1.

Fig. 4 is a perspective view of the second welding apparatus shown in fig. 1.

Fig. 5 is a schematic structural diagram of a workpiece.

Fig. 6 is a schematic structural diagram of a combined machining device of a hydraulic oil cylinder provided by the invention.

Reference numerals: 1. a first lathe; 2. a second lathe; 3. a double-headed lathe; 4. a first automatic conveyance device; 5. a second automatic conveyance device; 6. a first welding device; 7. a second welding device; 41. a first slide rail; 42. a first six-axis joint robot; 51. a second slide rail; 52. a second six-axis joint robot; 8. a feeding warehouse; 61. a first truss; 62. a first manipulator; 63. a first chuck assembly; 631. a base; 632. a first chuck; 64. a first welding gun; 65. a heating device; 651. heating a ring; 9. a material placing table; 71. a second truss; 72. a second manipulator; 73. a clamping assembly; 74. a second chuck assembly; 75. a second welding gun; 731. a mounting seat; 732. a clamping jaw; 10. a feeding frame; 11. a third lathe; 12. a third automatic conveyance device; 121. a third slide rail; 122. a third six-axis joint robot; 13. a blanking warehouse; 100. a cylinder barrel; 200. the plug cap is matched with the inner hole; 300. the piston rod head is matched with the inner hole; 400. blocking the cover; 500. the piston rod head.

Detailed Description

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, the present invention provides a combined machining apparatus for a hydraulic cylinder, including a first lathe 1, a second lathe 2, a double-head lathe 3, a first automatic handling device 4, a second automatic handling device 5, a first welding device 6 and a second welding device 7; the first lathe 1, the second lathe 2, and the double-head lathe 3 are disposed at one side of the first automatic transfer device 4 and the second automatic transfer device 5 at intervals in a row, the first welding device 6 and the second welding device 7 are disposed at the other side of the first automatic transfer device 4 and the second automatic transfer device 5 at intervals in a row,

the first automatic handling device 4 is used for moving a workpiece to be machined (a cylinder barrel 100 of the hydraulic oil cylinder) to a first lathe 1, a second lathe 2 and a first welding device 6, the first lathe 1 is used for finish turning of a plug matching inner hole 200 of the cylinder barrel 100, the second lathe 2 is used for finish turning of a piston rod head matching inner hole 300, the first welding device 6 is used for jacking a piston rod head 500 into the cylinder barrel 100 and welding, the second automatic handling device 5 is used for moving the cylinder barrel 100 welded by the first welding device 6 to a second welding device 7 and moving the cylinder barrel 100 welded by the second welding device 7 to a double-end lathe 3, the second welding device 7 is used for welding the plug 400 onto the cylinder barrel 100, and the double-end lathe 3 is used for punching a center hole and finish turning an inner hole chamfer on the piston rod head 500 on the cylinder barrel 100.

Referring to fig. 2 to 6, the first automatic handling device 4 further includes a first slide rail 41 and a first six-axis joint robot 42, the first lathe 1, the second lathe 2 and the double-end lathe 3 are disposed at one side of the first slide rail 41 in rows and at intervals, the first welding device 6 and the second welding device 7 are disposed at the other side of the first slide rail 41 in rows and at intervals, the first six-axis joint robot 42 is slidably connected to the first slide rail 41, and the first six-axis joint robot 42 can move on the first slide rail 41 and move the cylinder barrel 100 to the first lathe 1, the second lathe 2 and the first welding device 6.

Further, the second automatic transfer device 5 includes a second slide rail 51 and a second six-axis joint robot 52, the first lathe 1, the second lathe 2, and the double-headed lathe 3 are disposed on one side of the second slide rail 51 at intervals in a row, the first welding device 6 and the second welding device 7 are disposed on the other side of the second slide rail 51 at intervals in a row, the second slide rail 51 is connected to the first slide rail 41, the second six-axis joint robot 52 is slidably connected to the second slide rail 51, and the second six-axis joint robot 52 is movable on the second slide rail 51 and moves the welded cylinder tube 100 to the double-headed lathe 3.

Further, the combined machining equipment of the hydraulic oil cylinder further comprises a feeding warehouse 8, and the feeding warehouse 8 is arranged adjacent to the first automatic carrying device 4 and the first welding device 6. The workpieces to be machined are placed in the loading magazine 8 in batches by the worker, so that the first six-axis joint robot 42 of the first automatic conveyance device 4 moves the workpieces in the loading magazine 8 onto the first lathe 1.

Further, the first welding device 6 includes a first truss 61, a first robot 62 slidably connected to the first truss 61, a first chuck assembly 63 mounted below the first truss 61, and a first welding gun 64 disposed adjacent to the first chuck assembly 63; the first robot 62 can slide on the first truss 61 to grab and place the piston rod head 500 on the first chuck assembly 63, when the first automatic handling device 4 places the cylinder barrel 100 on the first chuck assembly 63, the first chuck assembly 63 pushes the piston rod head 500 into the cylinder barrel 100, and the first welding gun 64 performs circumferential welding on a gap between the cylinder barrel 100 and the piston rod head 500.

Further, the first chuck assembly 63 includes a base 631 and two first chucks 632 spaced apart from the base 631; two first chucks 632 are used to hold the cylinder 100, and one of the first chucks 632 can move on the base 631. When the first automatic handling device 4 places the cylinder 100 on the first chuck assembly 63, the two first chucks 632 of the first chuck assembly 63 clamp the cylinder 100, and the first chucks 632 capable of moving on the base 631 take down and push the piston rod head 500 grasped by the robot into the cylinder 100.

Further, the first welding device 6 further includes a heating device 65, the heating device 65 is disposed adjacent to the first chuck assembly 63, and a heating ring 651 for heating the cylinder barrel 100 is disposed on the heating device 65. After the cylinder 100 is heated by the heating ring 651, the piston rod head 500 is inserted into the cylinder 100 by the first chuck 632, which is movable on the base 631, in such a manner that the piston rod head 500 is inserted into the cylinder 100 by interference fit.

Further, the combined machining equipment of the hydraulic oil cylinder further comprises a material placing table 9, and the material placing table 9 is arranged adjacent to the first welding device 6 and the second welding device 7. After the welding of the welding gun is completed, the first automatic handling device 4 grabs the welded cylinder barrel 100 and places the welded cylinder barrel on the material placing table 9.

Further, the second welding device 7 includes a second truss 71, a second robot 72, a clamping assembly 73, a second chuck assembly 74, and a second welding gun 75; the second robot 72 is slidably connected to the second truss 71, the clamping assembly 73 is disposed adjacent to the second truss 71, the second chuck assembly 74 is disposed adjacent to the clamping assembly 73, and the second welding gun 75 is disposed adjacent to the clamping assembly 73 and above the clamping assembly 73.

When the first automatic handling device 4 grabs the welded cylinder barrel 100 and places the welded cylinder barrel 100 on the material placing table 9, the second automatic handling device 5 vertically places the welded cylinder barrel 100 on the material placing table 9 on the clamping assembly 73, the second chuck assembly 74 clamps the bottom end of the welded cylinder barrel 100, the second manipulator 72 slides along the second truss 71 and places the blanking cover 400 in the inner hole at the top end of the cylinder barrel 100, and the second welding gun 75 welds the top end of the cylinder barrel 100.

Further, the clamping assembly 73 includes a mounting seat 731, and a clamping jaw 732 mounted on the mounting seat 731 and located above the second chuck assembly 74, wherein the clamping jaw 732 is used for clamping the cylinder 100. When the second automatic handling device 5 vertically places the cylinder barrel 100 welded on the material placing table 9 on the clamping jaws 732 of the clamping assembly 73, the clamping jaws 732 clamp the middle section of the cylinder barrel 100, and the second chuck assembly 74 clamps the bottom end of the cylinder barrel 100. After the second welding gun 75 finishes welding the top end of the cylinder barrel 100, the second automatic handling device 5 grabs and places the cylinder barrel 100 on the double-end lathe 3, so that the double-end lathe 3 can perform centering and inner hole chamfering finish turning on the cylinder barrel 100.

Further, the combined machining equipment of the hydraulic oil cylinder further comprises a feeding frame 10, a third lathe 11 and a third automatic handling device 12; the feeding frame 10 is disposed between the third lathe 11 and the double-headed lathe 3, the third automatic conveying device 12 is disposed adjacent to the third lathe 11 at an interval, the feeding frame 10 is configured to convey the cylinder barrel 100 processed by the double-headed lathe 3 to the third automatic conveying device 12, and the third automatic conveying device 12 is configured to grasp the cylinder barrel 100 on the feeding frame 10 and place the cylinder barrel on the third lathe 11, so that the third lathe 11 can process the cylinder barrel 100.

Specifically, the number of the third lathes 11 is four, and the third lathes are distributed at intervals in groups; the third automatic conveying device 12 is arranged adjacent to the four third lathes 11 at intervals; the third automatic handling device 12 includes a third slide rail 121 disposed adjacent to the four third lathes 11, and a third six-axis joint robot 122 slidably connected to the third slide rail 121, where the third six-axis joint robot 122 is capable of sliding on the third slide rail 121 and is configured to place the cylinder 100 on the loading frame 10 on the four third lathes 11 in a grabbing manner. In the present embodiment, the first lathe 1, the second lathe 2, and the third lathe 11 are each of CK6163A type, and the double-headed lathe 3 is of FD150 to 2000 type.

After the double-end lathe 3 completes drilling of the center hole and chamfering of the cylinder barrel 100, the second automatic conveying device 5 grabs and places the cylinder barrel 100 after completion of drilling of the center hole and chamfering on the feeding frame 10, the third six-axis joint robot 122 of the third automatic conveying device 12 grabs and places the cylinder barrel 100 on the feeding frame 10 on four third lathes 11 one by one, and the four third lathes 11 finish-machine the outer circle and the end face of the piston rod head 500 on the cylinder barrel 100, and the outer circle and the outer groove of the cylinder barrel 100.

Further, the combined machining equipment of the hydraulic oil cylinder further comprises a blanking warehouse 13, and the blanking warehouse 13 is arranged adjacent to the third lathe 11. When the third lathe 11 finishes the finish turning of the outer circle and the end face of the piston rod head 500 on the cylinder 100, and the outer circle and the outer groove of the cylinder 100 are completed, the finish turning of the cylinder 100 is captured and placed in the blanking warehouse 13 by the third automatic handling device 12.

Further, the combined machining equipment of the hydraulic oil cylinder further comprises a control cabinet, a controller is accommodated in the control cabinet, and the controller is arranged adjacent to the feeding warehouse 8 and is electrically connected with the first six-axis joint robot 42 of the first automatic conveying device 4 and the second six-axis joint robot 52 of the second automatic conveying device 5.

When the automatic loading device is used, the controller sends an instruction to the first six-axis joint robot 42 to start the first six-axis joint robot 42, when the first six-axis joint robot 42 moves to a position close to the loading warehouse 8 along the first slide rail 41, the first six-axis joint robot 42 grabs and moves a workpiece (a cylinder barrel 100) in the loading warehouse 8 to the first lathe 1, the first lathe 1 finishes the cap matching with the inner hole 200 at one end of the cylinder barrel 100,

after the first lathe 1 is finished, the cylinder 100 on the first lathe 1 is grabbed and moved to the second lathe 2 by the first six-axis joint robot 42, the piston rod head at the other end of the cylinder 100 is finely turned by the second lathe 2 to match the inner hole 300,

after the second lathe 2 is machined, the controller sends a command to the first six-axis joint robot 42 to start the first six-axis joint robot 42, when the first six-axis joint robot 42 moves to a position close to the first welding device 6 along the first slide rail 41 and grabs and moves the cylinder 100 machined by the second lathe 2 onto the first welding device 6,

the first robot 62 of the first welding device 6 slides on the first truss 61 to grasp and place the piston rod head 500 on the first chuck assembly 63, when the first automatic handling device 4 places the cylinder barrel 100 on the first chuck assembly 63, the first chuck assembly 63 pushes the piston rod head 500 into the cylinder barrel 100, the first welding gun 64 circumferentially welds a gap between the cylinder barrel 100 and the piston rod head 500,

after the first welding device 6 is welded, the first six-axis joint robot 42 grabs and places the welded cylinder barrel 100 on the material placing table 9, the controller sends an instruction to the second six-axis joint robot 52 to start the second six-axis joint robot 52, when the second six-axis joint robot 52 moves to a position close to the material placing table 9 along the second slide rail 51, the second six-axis joint robot 52 vertically places the cylinder barrel 100 on the material placing table 9 on the clamping component 73 of the second welding device 7, the clamping jaw 732 clamps the middle section of the cylinder barrel 100, the second clamping component 74 clamps the bottom end of the cylinder barrel 100, the second manipulator 72 of the second welding device 7 slides on the second truss 71 and places the blocking cover 400 in the blocking cover matching 200 at the top end of the cylinder barrel 100, and the second welding gun 75 welds the top end of the cylinder barrel 100,

after the second welding gun 75 is welded, the second six-axis joint robot 52 grabs and moves the cylinder barrel 100 welded by the second welding gun 75 to the double-head lathe 3, the double-head lathe 3 performs centering and inner hole chamfering finish turning on the piston rod head 500 on the cylinder barrel 100,

after the double-end lathe 3 finishes drilling the center hole and chamfering, the second six-axis joint robot 52 grabs and moves the cylinder 100 after the center hole and chamfering to the feeding frame 10, the feeding frame 10 conveys the cylinder 100 processed by the double-end lathe 3 to the third automatic conveying device 12, the third six-axis joint robot 122 of the third automatic conveying device 12 grabs and places the cylinder 100 on the feeding frame 10 on the third lathe 11, and the third lathe 11 finely lathes the excircle and the end face of the piston rod head 500 on the cylinder 100, the excircle and the outer groove of the cylinder 100.

Has the advantages that: the first automatic conveying device 4, the second automatic conveying device 5 and the third automatic conveying device 12 are controlled to operate through the controller in the whole process, so that the first automatic conveying device 4, the second automatic conveying device 5 and the third automatic conveying device 12 are automatically conveyed to machining process equipment, machining is finished in a mode that workpieces are conveyed manually and matched with the machining process equipment, production efficiency is improved, labor cost is reduced, and the automation degree is high.

The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. The combined machining equipment of the hydraulic oil cylinder is characterized by comprising a first lathe (1), a second lathe (2), a double-end lathe (3), a first automatic conveying device (4), a second automatic conveying device (5), a first welding device (6) and a second welding device (7); the first lathe (1), the second lathe (2) and the double-head lathe (3) are arranged at one side of the first automatic conveying device (4) and the second automatic conveying device (5) at intervals in rows, the first welding device (6) and the second welding device (7) are arranged at the other side of the first automatic conveying device (4) and the second automatic conveying device (5) at intervals in rows,

the first automatic conveying device (4) is used for moving a cylinder barrel (100) to be machined to a first lathe (1), a second lathe (2) and a first welding device (6), the first lathe (1) is used for finish turning of a plug matching inner hole (200) of the cylinder barrel (100), the second lathe (2) is used for finish turning of a piston rod head matching inner hole (300), the first welding device (6) is used for pushing a piston rod head (500) into the cylinder barrel (100) and welding, the second automatic conveying device (5) is used for moving the cylinder barrel (100) welded by the first welding device (6) to a second welding device (7) and moving the cylinder barrel (100) welded by the second welding device (7) to a double-end lathe (3), the second welding device (7) is used for welding the plug (400) onto the cylinder barrel (100), and the double-end lathe (3) is used for centering a piston rod head (500) on the cylinder barrel (100) and finish turning of the inner hole And (6) chamfering.

2. The combined machining equipment of the hydraulic cylinder according to claim 1, characterized in that the first automatic handling device (4) comprises a first slide rail (41) and a first six-axis joint robot (42), the first lathe (1), the second lathe (2) and the double-head lathe (3) are arranged on one side of the first slide rail (41) in rows at intervals, the first welding device (6) and the second welding device (7) are arranged on the other side of the first slide rail (41) in rows at intervals, the first six-axis joint robot (42) is connected to the first slide rail (41) in a sliding manner, and the first six-axis joint robot (42) can move on the first slide rail (41) and move the cylinder barrel (100) to the first lathe (1), the second lathe (2) and the first welding device (6).

3. The combined machining apparatus of a hydraulic cylinder according to claim 1, the second automatic carrying device (5) comprises a second slide rail (51) and a second six-axis joint robot (52), the first lathe (1), the second lathe (2) and the double-head lathe (3) are arranged on one side of the second slide rail (51) at intervals in rows, the first welding devices (6) and the second welding devices (7) are arranged on the other side of the second sliding rail (51) at intervals in rows, the second sliding rail (51) is connected with the first sliding rail (41), the second six-axis joint robot (52) is connected to the second sliding rail (51) in a sliding manner, the second six-axis joint robot (52) can move on the second slide rail (51) and move the welded cylinder (100) to the double-headed lathe (3).

4. The combined machining apparatus of a hydraulic cylinder according to claim 1, wherein the first welding device (6) comprises a first truss (61), a first robot (62) slidably connected to the first truss (61), a first chuck assembly (63) installed below the first truss (61), and a first welding gun (64) disposed adjacent to the first chuck assembly (63); the first manipulator (62) can slide on the first truss (61) to grab and place the piston rod head (500) on the first chuck component (63).

5. The combined machining device of a hydraulic cylinder as set forth in claim 4, characterized in that the first chuck assembly (63) comprises a base (631) and two first chucks (632) mounted on the base (631) at intervals; two first chucks (632) are used for clamping the cylinder (100), and one of the first chucks (632) can move on the base (631).

6. Combined machining device of a hydraulic cylinder according to claim 4, characterized in that said first welding means (6) further comprise heating means (65), said heating means (65) being arranged adjacent to said first chuck assembly (63) and said heating means (65) being provided with a heating ring (651).

7. The combined machining apparatus of a hydraulic cylinder according to claim 1, characterized in that the second welding device (7) comprises a second truss (71), a second robot arm (72), a clamping assembly (73), a second chuck assembly (74) and a second welding gun (75); the second manipulator (72) is connected to the second truss (71) in a sliding mode, the clamping assembly (73) is arranged adjacent to the second truss (71), the second chuck assembly (74) is arranged adjacent to the clamping assembly (73), and the second welding gun (75) is arranged adjacent to the clamping assembly (73) and located above the clamping assembly (73).

8. The combined machining device of the hydraulic cylinder as claimed in claim 7, wherein the clamping assembly (73) comprises a mounting seat (731) and a clamping jaw (732) mounted on the mounting seat (731) and located above the second chuck assembly (74), the clamping jaw (732) being used for clamping the cylinder barrel (100).

9. The combined machining equipment of the hydraulic oil cylinder as claimed in claim 1, characterized by further comprising a loading frame (10), a third lathe (11) and a third automatic handling device (12); the feeding frame (10) is arranged between the third lathe (11) and the double-head lathe (3), and the third automatic conveying device (12) and the third lathe (11) are arranged at intervals and adjacent to each other.

10. The combined machining device of a hydraulic cylinder according to claim 1, characterized by further comprising a material placing table (9), wherein the material placing table (9) is arranged adjacent to the first welding device (6) and the second welding device (7).