An apparatus for multi-station laser welding of steel pistons

Abstract

The present application relates to the technical field of welding, in particular to a multi-station laser welding steel piston equipment, which comprises a piston assembly, a first welding gun and a second welding gun, the piston assembly comprises a head, a skirt and a pin seat, the head center has a square protrusion, the skirt and the pin seat center are both pre-provided with a groove body matched with the protrusion, the head, the skirt and the pin seat are assembled through the protrusion and the groove body, the protrusion and the pin seat end face form a square top joint, the head and skirt contact surface and the skirt and pin seat contact surface both form an annular side joint; the equipment further comprises a welding chamber, the equipment can drive the first welding gun and the second welding gun to move simultaneously by setting a moving assembly, the first welding gun welds two annular side joints, the second welding gun welds the square top joint, the side joint and the top joint are welded simultaneously, only one preheating, heat preservation and clamping and other welding preparation operations are needed, and the welding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a multi-station laser welding device for steel pistons. BACKGROUND

[0002] The piston is an important component of the engine, which bears high temperature, high pressure and high-speed stress. The piston head is usually exposed to the combustion chamber and bears the highest temperature and pressure, so it is made of steel. The piston skirt and pin seat mainly bear mechanical stress and friction, so they are made of aluminum alloy. Therefore, the piston is welded by the steel head and the aluminum alloy skirt and pin seat. In order to connect the head, the skirt and the pin seat more precisely, the center of the head has a square protrusion, the center of the skirt and the pin seat has a groove body matched with the protrusion. When the head, the skirt and the pin seat are assembled, the head protrusion and the end face of the pin seat form a square top joint. The contact surface of the head and the skirt, and the contact surface of the skirt and the pin seat form an annular side joint.

[0003] In the production of the piston, the top joint and the two side joints need to be welded by using a welding device. The existing welding device needs to connect the above-mentioned top joint and two side joints in several times. Before each welding, preheating, heat preservation and clamping operations are needed, which increases the welding time and reduces the welding efficiency. Therefore, a multi-station laser welding device for steel pistons is proposed. SUMMARY

[0004] The present application aims to provide a multi-station laser welding device for steel pistons to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a multi-station laser welding device for steel pistons, comprising a piston assembly, a first welding gun and a second welding gun. The piston assembly comprises a head, a skirt and a pin seat. The center of the head has a square protrusion. The center of the skirt and the pin seat is pre-provided with a groove body matched with the protrusion. The head, the skirt and the pin seat are assembled by inserting the protrusion and the groove body. The protrusion and the end face of the pin seat form a square top joint. The contact surface of the head and the skirt, and the contact surface of the skirt and the pin seat form an annular side joint.

[0006] It also comprises a welding chamber. The first welding gun and the second welding gun are arranged in the welding chamber through a moving assembly. The bottom of the welding chamber is provided with a cylindrical workbench. The workbench is provided with a positioning member. The positioning member enables the assembled piston assembly to be stably positioned on the upper surface of the workbench. The moving assembly can drive the first welding gun and the second welding gun to move, so that the first welding gun welds the two annular side joints, and the second welding gun welds the square top joint.

[0007] Preferably, the moving assembly comprises a circular plate and an annular plate, the circular plate is fixedly installed on the top of the welding chamber, the annular plate is rotatably installed on the top of the welding chamber, the annular plate is sleeved outside the circular plate, the circular plate and the annular plate are coaxially arranged with the workbench, a rotating mechanism is arranged in the welding chamber, the rotating mechanism is used for driving the annular plate to rotate, the first welding gun is connected with the output end of the rotating mechanism through the first adjusting piece, a frame body is arranged between the circular plate and the annular plate, the second welding gun is arranged at the bottom of the frame body through the second adjusting piece, and controllable connecting pieces are arranged on the upper portion of the frame body.

[0008] Preferably, the controllable connecting pieces comprise a plug rod inserted on the top of the frame body, the plug rod is arranged along the radial direction of the circular plate, a plurality of plug holes matched with the plug rod are formed around the outer surface of the circular plate, four sets of positioning sleeves matched with the plug rod are fixedly connected to the surface of the annular plate, a magnetic block is fixedly connected to the plug rod, springs are fixedly connected between the magnetic block and the frame body, the springs are sleeved on the outer surface of the plug rod, and an electromagnet is fixedly connected to the surface of the frame body and opposite to the magnetic block.

[0009] Preferably, the rotating mechanism rotates two circles as a period, the period time is set as N, in the period, the controllable connecting pieces make the plug rod move into the positioning sleeves and the plug holes alternately, and the moving interval time of the plug rod is N / 8.

[0010] Preferably, the side wall of the frame body is provided with a T-shaped sliding block, and the inner surface of the annular plate is provided with an annular inner groove, and the T-shaped sliding block is rotatably installed in the annular inner groove.

[0011] Preferably, the rotating mechanism comprises a motor fixedly installed on the bottom of the welding chamber, an output shaft of the motor is fixedly connected with a transmission wheel, the outer surface of the workbench is rotatably sleeved with a transmission sleeve plate, the transmission wheel and the outer surface of the transmission sleeve plate are jointly sleeved with a conveying belt, the surface of the transmission sleeve plate is fixedly connected with a vertical plate, the upper end of the vertical plate is fixedly connected with the annular plate, and the first welding gun is arranged in the middle portion of the vertical plate through the first adjusting piece.

[0012] Preferably, the first adjusting piece comprises a first sliding seat and a second sliding seat, the first sliding seat is fixedly installed on the surface of the vertical plate, the second sliding seat is partially slidably installed in the second sliding seat, first electric push rods are fixedly installed in the first sliding seat and the second sliding seat, the telescopic end of the first electric push rod located in the first sliding seat is fixedly connected with the second sliding seat, the telescopic end of the first electric push rod located in the second sliding seat is connected with the first welding gun, the first sliding seat is arranged along the radial direction of the workbench, and the second sliding seat is arranged along the vertical direction.

[0013] Preferably, the second adjusting piece comprises a vertical slot formed in the bottom of the frame body, a second electric push rod fixedly connected inside the vertical slot, a third sliding seat fixedly connected to the telescopic end of the second electric push rod through a connecting plate, a third electric push rod fixedly connected inside the third sliding seat, and the telescopic end of the third electric push rod is connected with the second welding gun.

[0014] Preferably, when the plug rod is located inside the plug hole, the third sliding seat is parallel to one side of the top seam, the second welding gun is aligned with the side of the top seam, and the moving stroke of the third electric push rod is greater than or equal to the side length of the top seam.

[0015] Preferably, the positioning piece comprises four groups of grooves formed on the upper surface of the workbench, the grooves are radially arranged on the workbench, and the grooves are arranged in a ring array, a positioning block is slidably connected in each groove, a through hole is reserved on the outer surface of the workbench, the through hole is used for inserting a bolt, and the bolt can drive the positioning block to move and make the positioning block abut against the surface of the piston assembly.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] By arranging the moving assembly, the first welding gun and the second welding gun can be moved simultaneously, the first welding gun can weld two ring-shaped side seams, the second welding gun can weld the square top seam, the side seam and the top seam can be welded at the same time, only one preheating, heat preservation and clamping operation before welding is required, and the welding efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic structural view of the whole of the present application;

[0019] Figure 2 It is a schematic structural view of the welding chamber when partially cut open;

[0020] Figure 3 It is a schematic structural view of the welding chamber and the moving assembly when partially cut open;

[0021] Figure 4 It is a schematic structural view of the first adjusting piece of the present application; Figure 3 It is an enlarged view of A in the present application;

[0022] Figure 5 It is an exploded view of the piston assembly of the present application;

[0023] Figure 6 It is a schematic structural view of the first adjusting piece of the present application;

[0024] Figure 7 It is a schematic structural view of the second adjusting piece of the present application;

[0025] Figure 8 It is a schematic structural view of the rotating mechanism of the present application.

[0026] In the drawings, the components represented by each reference numeral are listed as follows: 1, workbench; 2, piston assembly; 21, head; 22, skirt; 23, protrusion; 24, groove; 25, pin seat; 3, first welding gun; 4, second welding gun; 5, first adjusting member; 51, first sliding seat; 52, first electric push rod; 53, second sliding seat; 6, second adjusting member; 61, vertical groove; 62, second electric push rod; 63, connecting plate; 64, third electric push rod; 65, third sliding seat; 7, welding chamber; 8, moving assembly; 81, circular plate; 82, annular plate; 83, magnetic block; 84, electromagnet; 85, spring; 86, insertion hole; 87, frame; 88, insertion rod; 89, positioning sleeve; 9, rotating mechanism; 91, motor; 92, transmission wheel; 93, transmission belt; 94, transmission sleeve plate; 95, vertical plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0028] Please refer to Figures 1-8 , a kind of multi-station laser welding steel piston equipment is shown in the drawing, including piston assembly 2, first welding gun 3 and second welding gun 4, piston assembly 2 includes head 21, skirt 22 and pin seat 25, head 21 center has a square protrusion 23, skirt 22 and pin seat 25 center are pre-provided with groove 24 matched with protrusion 23, head 21, skirt 22 and pin seat 25 are assembled by protrusion 23 and groove 24, the end surface of protrusion 23 and pin seat 25 forms square top joint, the contact surface of head 21 and skirt 22, the contact surface of skirt 22 and pin seat 25 all form annular side joint;

[0029] It also includes welding chamber 7, first welding gun 3 and second welding gun 4 are arranged in welding chamber 7 by setting moving assembly 8, the bottom of welding chamber 7 is provided with cylindrical workbench 1, positioning member is arranged on workbench 1, positioning member makes assembled piston assembly 2 stably positioned on the upper surface of workbench 1, moving assembly 8 can drive first welding gun 3 and second welding gun 4 to move.

[0030] Further, the positioning member includes four groups of grooves provided on the upper surface of workbench 1, the grooves are all arranged along the radial direction of workbench 1, and the grooves are arranged in annular array, positioning blocks are all slidably connected in the grooves, through holes are reserved on the outer surface of workbench 1, the through holes are used for inserting bolts, the bolts can drive the positioning blocks to move and make the positioning blocks abut against the surface of piston assembly 2.

[0031] In the embodiment, the assembled piston assembly 2 is placed on the center of the upper surface of the workbench 1 with the square top seam facing upwards, and the positioning block is moved by the bolt to abut against the outer surface of the piston assembly 2 to fix the piston assembly 2. By arranging the moving assembly 8, the first welding gun 3 and the second welding gun 4 can be moved simultaneously, the first welding gun 3 can weld two annular side seams, and the second welding gun 4 can weld the square top seam. Thus, the side seam and the top seam can be welded simultaneously, and only one preheating, heat preservation and clamping operation is required before welding, thereby improving the welding efficiency.

[0032] Further, the moving assembly 8 comprises a circular plate 81 and an annular plate 82. The circular plate 81 is fixedly installed on the top of the welding chamber 7, and the annular plate 82 is rotatably installed on the top of the welding chamber 7. The annular plate 82 is sleeved outside the circular plate 81. The circular plate 81 and the annular plate 82 are coaxially arranged with the workbench 1. A rotating mechanism 9 is arranged in the welding chamber 7. The rotating mechanism 9 is used to drive the annular plate 82 to rotate. The first welding gun 3 is connected to the output end of the rotating mechanism 9 through the first adjusting part 5. The second welding gun 4 is arranged at the bottom of the frame body 87 by arranging the second adjusting part 6. The upper part of the frame body 87 is provided with a controllable connecting part. The controllable connecting part can connect the frame body 87 to the circular plate 81 or the annular plate 82.

[0033] Further, the controllable connecting part comprises a plug rod 88 which is inserted into the top of the frame body 87. The plug rod 88 is arranged along the radial direction of the circular plate 81. A plurality of plug holes 86 which are matched with the plug rod 88 are formed around the outer surface of the circular plate 81. Four groups of positioning sleeves 89 which are matched with the plug rod 88 are fixedly connected to the surface of the annular plate 82. A magnetic block 83 is fixedly connected to the plug rod 88. A spring 85 is fixedly connected between the magnetic block 83 and the frame body 87. The spring 85 is sleeved on the outer surface of the plug rod 88. An electromagnet 84 is fixedly connected to the position of the surface of the frame body 87 which is opposite to the magnetic block 83. The electromagnet 84 is electrified to attract the magnetic block 83 to move, so that the plug rod 88 moves out of the plug hole 86 and moves into the positioning sleeve 89.

[0034] Further, the rotating mechanism 9 rotates two circles as one period, and the period time is set as N. In the period, the controllable connecting part moves the plug rod 88 into the positioning sleeve 89 and the plug hole 86 alternately, and the moving interval time of the plug rod 88 is N / 8.

[0035] Further, the side wall of the frame body 87 has a T-shaped sliding block, and the inner surface of the annular plate 82 is provided with an annular inner groove. The T-shaped sliding block is rotatably installed in the annular inner groove.

[0036] Further, the rotating mechanism 9 comprises a motor 91 fixedly installed on the bottom of the welding chamber 7, an output shaft of the motor 91 is fixedly connected with a transmission wheel 92, the outer surface of the workbench 1 is rotatably sleeved with a transmission sleeve plate 94, the transmission wheel 92 and the outer surface of the transmission sleeve plate 94 are jointly sleeved with a conveying belt 93, the surface of the transmission sleeve plate 94 is fixedly connected with a vertical plate 95, the upper end of the vertical plate 95 is fixedly connected with the annular plate 82, and the first welding gun 3 is arranged in the middle part of the vertical plate 95 through the first adjusting part 5.

[0037] In the embodiment, the motor 91 is driven to rotate, so as to drive the transmission wheel 92, the conveying belt 93, the transmission sleeve plate 94, the vertical plate 95, the annular plate 82, the first adjusting part 5 and the first welding gun 3 to rotate around the center of the workbench 1, that is, the first welding gun 3 can be driven to rotate around the piston assembly 2, so that the first welding gun 3 can weld the side seams on the surface of the piston assembly 2; in addition, in the initial state, the insertion rod 88 is inserted into the insertion hole 86, in the first N / 8 period, the second welding gun 4 welds one side of the top seam, at the first N / 8, the electromagnet 84 is powered to attract the magnetic block 83 to move, so that the insertion rod 88 moves out of the insertion hole 86 and moves into the positioning sleeve 89, and the connecting frame body 87 is connected with the annular plate 82, therefore, in the second N / 8 period, the frame body 87 rotates 90 degrees synchronously with the annular plate 82, so that the second welding gun 4 is aligned with the other side of the top seam, at the second N / 8, the electromagnet 84 is powered off, the spring 85 is reset to drive the insertion rod 88 to move out of the positioning sleeve 89 and move into the insertion hole 86, and the connecting frame body 87 is connected with the circular plate 81, at this time, the second welding gun 4 can weld the second side of the top seam, and the above process is repeated in the subsequent period, therefore, when the first welding gun 3 welds the two side seams, the second welding gun 4 can weld the top seam.

[0038] Further, the first adjusting part 5 comprises a first sliding seat 51 and a second sliding seat 53, the first sliding seat 51 is fixedly installed on the surface of the vertical plate 95, the second sliding seat 53 is partially and slidably installed in the second sliding seat 53, the first sliding seat 51 and the second sliding seat 53 are both fixedly installed with a first electric push rod 52, the telescopic end of the first electric push rod 52 located in the first sliding seat 51 is fixedly connected with the second sliding seat 53, the telescopic end of the first electric push rod 52 located in the second sliding seat 53 is connected with the first welding gun 3, and the first sliding seat 51 is arranged along the radial direction of the workbench 1, and the second sliding seat 53 is arranged along the vertical direction.

[0039] In the embodiment, the first electric push rod 52 is driven to extend and retract, so as to adjust the height of the first welding gun 3 and the distance between the first welding gun 3 and the piston assembly 2.

[0040] Further, the second adjusting piece 6 comprises a vertical slot 61 formed in the bottom of the frame body 87, a second electric push rod 62 fixedly connected inside the vertical slot 61, a third sliding seat 65 fixedly connected to the extension end of the second electric push rod 62 through a connecting plate 63, a third electric push rod 64 fixedly connected inside the third sliding seat 65, and the extension end of the third electric push rod 64 is connected with the second welding gun 4.

[0041] Further, when the plug rod 88 is located inside the plug hole 86, the third sliding seat 65 is parallel to one side of the top seam, the second welding gun 4 is aligned with the side of the top seam, and the moving stroke of the third electric push rod 64 is greater than or equal to the length of the side of the top seam.

[0042] In the embodiment, the height of the second welding gun 4 can be adjusted by driving the second electric push rod 62 to extend or retract, and the second welding gun 4 can be moved along the side of the top seam by driving the third electric push rod 64 to extend or retract, so as to weld the top seam.

[0043] It should be noted that the first welding gun 3 and the second welding gun 4 are both electron beam welding guns, and the electric power components such as the first welding gun 3, the second welding gun 4, the electromagnet 84, the first electric push rod 52, the second electric push rod 62, and the third electric push rod 64 can be used with a controller, the controller controls the on-off and running time of the components through a program, and the cycle N of welding two side seams is measured according to actual conditions.

[0044] It should be noted that in this document, the relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0045] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for multi-station laser welding of steel pistons, comprising a piston assembly (2), a first welding torch (3), and a second welding torch (4), characterized in that: The piston assembly (2) includes a head (21), a skirt (22), and a pin seat (25). The head (21) has a square protrusion (23) at its center. The skirt (22) and the pin seat (25) are both pre-drilled with grooves (24) that are adapted to the protrusion (23). The head (21), skirt (22), and pin seat (25) are assembled by inserting the protrusion (23) into the groove (24). The end faces of the protrusion (23) and the pin seat (25) form a square top seam. The contact surfaces of the head (21) and the skirt (22) and the skirt (22) and the pin seat (25) both form annular side seams. It also includes a welding chamber (7), in which the first welding gun (3) and the second welding gun (4) are set in the welding chamber (7) by setting a moving component (8). A cylindrical worktable (1) is set at the bottom of the welding chamber (7), and a positioning component is set on the worktable (1). The positioning component makes the assembled piston assembly (2) stably located on the upper surface of the worktable (1). The moving component (8) can drive the first welding gun (3) and the second welding gun (4) to move, so that the first welding gun (3) welds two annular side seams and the second welding gun (4) welds a square top seam. The moving component (8) includes a circular plate (81) and an annular plate (82). The circular plate (81) is fixedly installed on the top of the welding chamber (7). The annular plate (82) is rotatably installed on the top of the welding chamber (7). The annular plate (82) is sleeved on the outside of the circular plate (81). Both the circular plate (81) and the annular plate (82) are coaxially arranged with the worktable (1). A rotating mechanism (9) is provided in the welding chamber (7). The rotating mechanism (9) is used to drive the annular plate (82) to rotate. The first welding gun (3) is connected to the output end of the rotating mechanism (9) through a first adjusting member (5). A frame (87) is provided between the circular plate (81) and the annular plate (82). The second welding gun (4) is set at the bottom of the frame (87) through a second adjusting member (6). A controllable connector is provided on the upper part of the frame (87). The controllable connector enables the frame (87) to connect to the circular plate (81) or the annular plate (82). The controllable connector includes a plug rod (88) inserted into the top of the frame (87). The plug rod (88) is arranged radially along the circular plate (81). The outer surface of the circular plate (81) is provided with insertion holes (86) that are compatible with the plug rod (88) around its perimeter. Four sets of positioning sleeves (89) that are compatible with the plug rod (88) are fixedly connected to the surface of the annular plate (82). A magnetic block (83) is fixedly connected to the plug rod (88). A spring (85) is fixedly connected between the magnetic block (83) and the frame (87). The spring (85) is sleeved on the outer surface of the plug rod (88). An electromagnet (84) is fixedly connected to the surface of the frame (87) at a position opposite to the magnetic block (83). When the electromagnet (84) is energized, it attracts the magnetic block (83) to move, causing the plug rod (88) to move out of the insertion hole (86) and into the positioning sleeve (89). The rotating mechanism (9) rotates two revolutions as one cycle, and the cycle time is set to N. During this cycle, the controllable connector causes the insertion rod (88) to alternately move into the positioning sleeve (89) and the insertion hole (86), and the interval time of the insertion rod (88) movement is N / 8.

2. The equipment for multi-station laser welding of steel pistons according to claim 1, characterized in that: The frame (87) has a T-shaped slider on its side wall, and the inner surface of the annular plate (82) is provided with an annular inner groove. The T-shaped slider is rotatably installed inside the annular inner groove.

3. The equipment for multi-station laser welding of steel pistons according to claim 2, characterized in that: The rotating mechanism (9) includes a motor (91) fixedly installed at the bottom of the welding chamber (7). The output shaft of the motor (91) is fixedly connected to a transmission wheel (92). A transmission sleeve plate (94) is rotatably sleeved on the outer surface of the workbench (1). A conveyor belt (93) is sleeved on the outer surface of the transmission wheel (92) and the transmission sleeve plate (94). A vertical plate (95) is fixedly connected to the surface of the transmission sleeve plate (94). The upper end of the vertical plate (95) is fixedly connected to an annular plate (82). The first welding torch (3) is set in the middle of the vertical plate (95) through a first adjusting member (5).

4. The equipment for multi-station laser welding of steel pistons according to claim 3, characterized in that: The first adjusting member (5) includes a first slide (51) and a second slide (53). The first slide (51) is fixedly installed on the surface of the vertical plate (95). The second slide (53) is partially slidably installed inside the second slide (53). A first electric push rod (52) is fixedly installed inside both the first slide (51) and the second slide (53). The telescopic end of the first electric push rod (52) located inside the first slide (51) is fixedly connected to the second slide (53). The telescopic end of the first electric push rod (52) located inside the second slide (53) is connected to the first welding gun (3). The first slide (51) is arranged radially along the worktable (1), and the second slide (53) is arranged vertically.

5. The equipment for multi-station laser welding of steel pistons according to claim 1, characterized in that: The second adjusting component (6) includes a vertical groove (61) opened at the bottom of the frame (87), a second electric push rod (62) is fixedly connected inside the vertical groove (61), the telescopic end of the second electric push rod (62) is fixedly connected to a third slide (65) through a connecting plate (63), the third slide (65) is fixedly connected to a third electric push rod (64), and the telescopic end of the third electric push rod (64) is connected to the second welding gun (4).

6. The equipment for multi-station laser welding of steel pistons according to claim 5, characterized in that: When the insertion rod (88) is located inside the insertion hole (86), the third slide (65) is parallel to one side of the top seam, the second welding gun (4) is aligned with that side of the top seam, and the travel of the third electric push rod (64) is greater than or equal to the length of the top seam side.

7. The equipment for multi-station laser welding of steel pistons according to claim 1, characterized in that: The positioning component includes four sets of grooves on the upper surface of the worktable (1). The grooves are arranged radially along the worktable (1) and are distributed in a ring array. A positioning block is slidably connected in each groove. A through hole is reserved on the outer surface of the worktable (1) for bolt insertion. The bolt can drive the positioning block to move and make the positioning block abut against the surface of the piston assembly (2).

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