Plasma welding process for press-fit riveting piece for differential mechanism

Abstract

The invention provides a plasma welding process of a press-fit riveting piece for a differential mechanism, the plasma welding process uses a plasma welding device, the plasma welding device comprises a workbench, the upper surface of the workbench is fixedly connected with a welding supporting rod, one side of the welding supporting rod is provided with an L-shaped mounting block, and the other side of the welding supporting rod is provided with a clamping groove; a plasma welding gun is mounted at one end of the L-shaped mounting block, two supporting plates are fixedly connected to the bottom face of the workbench, and a grinding assembly is arranged on the surface of the workbench. According to the plasma welding device for the press-fit riveting piece for the differential mechanism, the press-fit riveting piece is firstly clamped and positioned, the welding position of the press-fit riveting piece is polished, the anti-reflection agent is sprayed on the press-fit riveting piece, and then welding is conducted, so that the plasma welding effect of the press-fit riveting piece for the differential mechanism is effectively improved, the welding quality is ensured, and the high-performance manufacturing requirement of the differential mechanism is met.

Description

Technical Field

[0001] The invention relates to the technical field of plasma welding, and in particular to a plasma welding process for press-fit rivets for differentials. Background Art

[0002] As a key component in the transmission system of various vehicles and mechanical equipment, the performance of the differential is directly related to the stability, reliability and operating efficiency of the entire power transmission. During the assembly process of the differential, the press-fit rivets play a core role in connecting and fixing various key components. The welding quality of these rivets has become one of the key factors determining the overall quality of the differential.

[0003] Upon investigation, the public announcement number: CN119187796A discloses a plasma welding device for copper tubes. This technology discloses "through the provision of technical solutions such as a mechanical arm, a plasma welding gun, a frame, a bracket one, a bracket two, a clamping frame one, a clamping frame two, a motor, an inner shaft, an outer shaft, a slide assembly and a clamping assembly, the plasma welding gun is suspended above the copper tube by the mechanical arm, so as to avoid displacement or deformation of the welding part of the copper tube during welding, thereby improving the welding quality and other technical effects".

[0004] Although this design has the technical effects of reducing the stress on copper tubes during welding and improving welding quality, this welding method still has problems such as insufficient welding strength, unstable weld quality, and easy welding deformation when processing differential press-fit rivets, which greatly reduces the overall performance of the differential. Therefore, we proposed a plasma welding process for press-fit rivets for differentials. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art and provide a plasma welding process for press-fit rivets for differentials. The press-fit rivets are first clamped and positioned, and the welding position of the press-fit rivets is polished and sprayed with a permeability enhancer before welding. This effectively improves the plasma welding effect of the press-fit rivets for differentials, ensures the welding quality, and meets the high-performance manufacturing requirements of differentials.

[0006] To achieve the above object, the present invention provides the following technical solution: a plasma welding device for press-fit rivets for differentials, comprising a workbench, a welding support rod is fixedly connected to the upper surface of the workbench, an L-shaped mounting block is provided on one side of the welding support rod, a plasma welding gun is installed at one end of the L-shaped mounting block, and two support plates are fixedly connected to the bottom surface of the workbench;

[0007] The surface of the workbench is provided with a grinding assembly, which includes a grinding disc arranged above the workbench and a grinding motor for grinding the press-fit rivet through the grinding disc, an upper crossbar, a vertical rod, an inclined rod, a longitudinal slide rod, a hollow rod, a first hydraulic push rod, a connecting plate, a lower crossbar, a linkage shaft, a conveyor belt, a conveyor roller, a first drive motor and a built-in rectangular slide plate;

[0008] A spraying assembly is arranged above the workbench, and the spraying assembly includes a spray gun arranged above the workbench and a second rectangular rod sleeve for spraying a permeability enhancer on the press-fit rivet through the spray gun, a rectangular connecting rod, an infrared proximity sensor, a storage box, a conveying pipe, a linkage plate and a rectangular fixing rod;

[0009] The surface of the built-in rectangular slide is provided with a clamping assembly, which includes a pipe sleeve arranged above the built-in rectangular slide, two bent connecting rods symmetrically arranged inside the pipe sleeve, a sealing cover for clamping the press-fit rivet through the two bent connecting rods, a circular sealing piston, a second hydraulic push rod, a rectangular housing, an auxiliary rotating shaft and a built-in square rod;

[0010] The surface of the sealing cover is provided with a pressure stabilizing assembly, which includes a transfer sealing box arranged on the surface of the sealing cover, an arc-shaped rubber block for clamping the press-fit rivet with appropriate force, an upper connecting rod, a positioning ring, a one-way valve and a counterweight ring.

[0011] As a preferred plasma welding process for press-fit rivets for a differential of the present invention, a built-in rectangular slide is inserted in the second rectangular slide groove opened on the upper surface of the workbench, and the built-in rectangular slide is slidably connected to the workbench. Two conveying rollers are arranged inside the second rectangular slide groove, and the surfaces of the two conveying rollers are sleeved with conveyor belts, and the two conveying rollers are connected through conveyor belt transmission. The rotating shafts of the two conveying rollers are respectively inserted in two rotating holes opened on the front surface of the workbench, and the conveying rollers and the workbench are rotatably connected. A first driving motor is installed on the front surface of the workbench, and the output shaft of the first driving motor is fixedly connected to the end of one of the rotating shafts of the conveying rollers, and a linkage shaft is inserted in the built-in longitudinal groove opened in the built-in rectangular slide, and the linkage shaft is slidably connected to the built-in rectangular slide, and one end of the linkage shaft is fixedly connected to one side of the conveyor belt.

[0012] The top end of the lifting block is connected with the support of the lifting block, and the bottom end of the lifting block is connected with the support of the lifting block, and the bottom end of the lifting block is connected with the support of the lifting block.

[0013] The top end of the telescopic rod of the first hydraulic push rod is fixedly connected with the bottom end of the telescopic rod of the first hydraulic push rod, and the bottom end of the telescopic rod of the first hydraulic push rod is fixedly connected with the bottom end of the telescopic rod. The first gear is connected with the gear train of the second gear and the gear is engaged with the first gear of the second gear.

[0014] As a preferred plasma welding process for press-fit rivets for a differential of the present invention, two transverse optical axes are fixedly connected to one side of the built-in rectangular slide, and the two transverse optical axes respectively pass through one side of the workbench transversely, and the transverse optical axes are slidably connected to the workbench.

[0015] As a preferred plasma welding process for a press-fit rivet for a differential of the present invention, a linkage plate is arranged inside the second rectangular slide groove, a built-in partition plate is arranged between the linkage plate and the built-in rectangular slide plate, the built-in partition plate is fixedly connected to the workbench, the linkage plate and the workbench are slidably connected, the end of the linkage shaft away from the conveyor belt is inserted into a through hole opened on the surface of the linkage plate, the linkage shaft and the linkage plate are slidably connected, a rectangular fixing rod is inserted into the first embedding groove opened on one side of the linkage plate away from the built-in partition plate, the rectangular fixing rod is slidably connected to the linkage plate, and the rectangular fixing rod A second rectangular rod sleeve is fixedly connected to a side away from the linkage plate, a second built-in polished rod is inserted inside the second rectangular rod sleeve, the second built-in polished rod and the second rectangular rod sleeve are slidably connected, the bottom end of the second built-in polished rod is fixedly connected to the workbench, a rectangular connecting rod is fixedly connected to the top end of the second rectangular rod sleeve, a spray gun is installed in the longitudinal hole opened on the upper surface of the rectangular connecting rod, an infrared proximity sensor is installed on the bottom surface of the rectangular connecting rod, a storage box is installed on the upper surface of the workbench, a conveying pipe is inserted on the upper surface of the storage box, and the other end of the conveying pipe is inserted in the feeding end of the spray gun.

[0016] As a preferred plasma welding process for press-fit rivets for a differential of the present invention, a pipe sleeve is arranged above the built-in rectangular skateboard, the bottom end of the pipe sleeve is fixedly connected to a bottom disc, the bottom surface of the bottom disc is fixedly connected to a built-in disc, the circumferential surface of the built-in disc is sleeved with a second bearing, the surface of the outer ring of the second bearing is fixedly connected to four L-shaped support rods, the bottom end of the L-shaped support rod is fixedly connected to the built-in rectangular skateboard, the built-in disc is rotatably connected to the second bearing and the L-shaped support rod, a second drive motor is installed on the upper surface of the built-in rectangular skateboard, and the end of the output shaft of the second drive motor is fixedly connected to the bottom surface of the built-in disc.

[0017] As a preferred plasma welding process for a press-fit rivet for a differential gear of the present invention, a built-in square rod is arranged inside the pipe sleeve, and a square frame plate and a rectangular shell are arranged on the surface of the built-in square rod, the square frame plate and the built-in square rod are fixedly connected, the rectangular shell and the built-in square rod are slidably connected, the square frame plate is slidably connected inside the rectangular shell, and a spring is arranged on the surface of the built-in square rod, and the two ends of the spring are respectively fixedly connected to the square frame plate and the rectangular shell, and two symmetrically arranged bending connecting rods are inserted into the mounting groove opened at the top of the built-in square rod, and the two bending connecting rods are rotatably connected to the built-in square rod through a pin shaft, and auxiliary rotating shafts are respectively inserted into the arc-shaped through grooves opened inside the two bending connecting rods, and the two auxiliary rotating shafts are respectively located in the second embedded grooves opened on the upper surface of the rectangular shell, and the auxiliary rotating shaft and the bending The connecting rod is movably connected, and the adjacent sides of the top of the two bent connecting rods are respectively fixedly connected with rubber clamps, and the bottom end of the built-in square rod is fixedly connected with four circular fixing rods in a ring array, and the end of the circular fixing rod away from the built-in square rod is fixedly connected to the pipe sleeve, and a sealing cover is provided under the rectangular shell, and two middle connecting rods are fixedly connected between the sealing cover and the rectangular shell, and a circular sealing piston is inserted inside the sealing cover, and the circular sealing piston and the sealing cover are sealingly and slidingly connected, and a second hydraulic push rod is installed on the upper surface of the bottom disc, and the end of the telescopic rod of the second hydraulic push rod is fixedly connected to the circular sealing piston, and auxiliary slides are respectively inserted in the two auxiliary sliding grooves opened in the pipe sleeve, and the auxiliary slides are slidably connected to the pipe sleeve, and the adjacent ends of the two auxiliary slides are respectively fixedly connected to the sealing cover.

[0018] As a preferred plasma welding process for a press-fit rivet for a differential of the present invention, a one-way valve is installed in the air hole opened on the upper surface of the sealing cover, a transfer sealing box is fixedly connected to the circumferential surface of the sealing cover, a limit cover with air holes is fixedly connected to the upper surface of the transfer sealing box, a limit tube is longitudinally inserted into the upper surface of the limit cover with air holes, the limit tube and the limit cover with air holes are fixedly connected, an upper connecting rod is inserted into the interior of the limit tube, the upper connecting rod and the limit tube are slidably connected, and the bottom end of the upper connecting rod is fixedly connected to An arc-shaped rubber block, the surface of the upper connecting rod is sleeved with a positioning ring and a counterweight ring, the positioning ring is located above the limiting tube, the counterweight ring is located above the positioning ring, the positioning ring and the upper connecting rod are fixedly connected, the counterweight ring and the upper connecting rod are slidably connected, the surface of the arc-shaped rubber block fits the groove wall with the exhaust hole on the upper surface of the transit sealing box, a U-shaped pipe is inserted on the upper surface of the transit sealing box, one end of the U-shaped pipe away from the transit sealing box is inserted on the upper surface of the sealing cover, and the transit sealing box is connected to the inside of the sealing cover through the U-shaped pipe.

[0019] A plasma welding process for a press-fit rivet for a differential according to the present invention comprises the following steps:

[0020] Step 1: Loading and clamping: Place the press-fit rivet between the two rubber clamps to fit it against the top of the pipe sleeve. Start the second hydraulic push rod to push the circular sealing piston upward, drive the relevant parts of the sealing cover to move, and make the bent connecting rod rotate to clamp the press-fit rivet. During the process, the principle of air pressure balance is used to ensure that the clamping force is appropriate and stable through the connection between the transfer sealing box and the sealing cover and the arc-shaped rubber block and other parts.

[0021] Step 2: Grinding: Turn on the first drive motor, and drive the built-in rectangular slide to move through the conveyor belt and the linkage shaft. When the press-fit rivet is in place, start the grinding motor and the second drive motor. The grinding motor drives the grinding disc to rotate, and cooperates with the second drive motor to rotate the press-fit rivet. At the same time, the grinding disc is driven to move with the help of the first hydraulic push rod and related mechanical structures to complete the grinding of the position to be welded. After the grinding is completed, the related components are reset;

[0022] Step 3: Spraying: During the movement of the linkage shaft, the infrared proximity sensor is driven to move up and down according to its position change. When the press-fit rivet approaches the sensor and enters the close range, the spray gun is triggered to start, and the permeability enhancer in the storage box is sprayed out by the spray gun through the delivery pipe and coated on the polished welding part of the press-fit rivet. When the press-fit rivet leaves, the spray gun stops.

[0023] Step 4: Welding: The conveyor belt continues to rotate to deliver the press-fit rivets to the end of the plasma welding gun. The plasma welding gun is fed with working gas and high voltage is applied to generate plasma. The plasma melts the metal with its high temperature and high energy characteristics, and the pre-treated press-fit rivets are welded.

[0024] Step 5: Unload the material, welding is completed, the one-way valve allows external air to enter the sealing cover, the circular sealing piston is reset, the press-fit rivets are released, and preparation for the next round of processing is completed.

[0025] The beneficial effects of the present invention are:

[0026] The present invention is beneficial to improving welding quality by providing a grinding component. The polished rivets can be better fused with other rivets during welding, reducing welding defects, and the strength and stability of the weld will be correspondingly improved, thereby improving the overall quality and performance of the differential and enhancing welding stability. The polished surface can enable the plasma arc to act on the rivets more stably, reducing arc fluctuations and making the welding process smoother.

[0027] The present invention is provided with a spraying assembly, which is conducive to automatically spraying the permeability enhancer on the welding part of the rivet, reducing splashing during welding, improving the strength of the welded joint, and enhancing the load-bearing capacity and reliability of the differential press-fit rivet during use.

[0028] The clamping assembly of the present invention is provided to facilitate fixing the differential press-fit rivet at a predetermined position, ensuring that the rivet will not be displaced in subsequent operations, thereby ensuring the welding effect of the press-fit rivet.

[0029] The present invention is provided with a pressure stabilizing component, which is beneficial to ensuring the clamping force of the press-fit rivet during the process of clamping the press-fit rivet, and avoiding the situation where the press-fit rivet is damaged due to a large clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a process flow chart of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the workbench and the first driving motor in the present invention;

[0032] Figure 3 For the present invention Figure 2 Sectional view at AA in the middle;

[0033] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0034] Figure 5 For the present invention Figure 3 The enlarged view of point B in the middle;

[0035] Figure 6 For the present invention Figure 3 Enlarged view of point C in the middle;

[0036] Figure 7 It is a structural schematic diagram of the linkage plate and the rectangular fixing rod in the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of the built-in rectangular slide plate and the third magnet in the present invention;

[0038] Fig. 9 It is a schematic structural diagram of the bent connecting rod and the rectangular shell in the present invention;

[0039] Fig.10 It is a schematic diagram of the structure of the spring and the built-in square rod in the present invention;

[0040] Fig.11 It is a schematic structural diagram of the arc-shaped rubber block and the upper connecting rod in the present invention;

[0041] Fig.12 It is a schematic diagram of the structure of the built-in disc and the second bearing in the present invention;

[0042] Fig.13 It is a structural schematic diagram of the upper cross bar and the first rectangular rod sleeve in the present invention;

[0043] Fig.14It is a schematic structural diagram of the second tooth plate and the long gear in the present invention;

[0044] Fig.15 It is a structural schematic diagram of the workbench and the built-in partition plate in the present invention;

[0045] In the figure:

[0046] 1. Workbench; 2. Support plate; 3. Welding support rod; 4. Plasma welding gun; 5. L-shaped mounting block; 6. Grinding assembly; 61. Counterweight block; 62. Grinding motor; 63. Grinding shaft; 64. First bearing; 65. Grinding disc; 66. Upper crossbar; 67. Vertical rod; 68. Tilt rod; 69. Longitudinal slide rod; 610. Hollow rod; 611. First hydraulic push rod; 612. Connecting plate; 613. First rectangular slide groove; 614. First rectangular rod sleeve; 615. First built-in polished rod; 616. First tooth plate; 617. Second tooth plate; 618 , first magnet; 619, iron pressure plate; 620, long gear; 621, built-in rotating shaft; 622, second magnet; 623, built-in rectangular slide; 624, third magnet; 625, built-in longitudinal groove; 626, linkage shaft; 627, conveyor belt; 628, conveyor roller; 629, first drive motor; 630, transverse optical axis; 631, second rectangular slide; 632, third rectangular slide; 633, side baffle; 634, lower cross bar; 635, fourth rectangular slide; 7, spray assembly; 71, second rectangular rod sleeve; 72, rectangular connecting rod; 73, spray gun; 74, infrared proximity sensor; 75, storage box; 76, delivery pipe; 77, second built-in light rod; 78, linkage plate; 79, rectangular fixed rod; 710, built-in partition plate; 711, first embedded groove; 8, clamping assembly; 81, pipe sleeve; 82, bottom disc; 83, L-shaped support rod; 84, auxiliary slide; 85, auxiliary slide; 86, sealing cover; 87, second drive motor; 88, circular sealing piston; 89, second hydraulic push rod; 810, middle connecting rod; 811, circular fixed rod; 812, rectangular shell body; 813, second embedding groove; 814, auxiliary rotating shaft; 815, rubber clamp; 816, bending connecting rod; 817, built-in square rod; 818, spring; 819, square frame plate; 820, mounting groove; 821, arc-shaped through groove; 822, built-in disc; 823, second bearing; 9, voltage stabilizing assembly; 91, transfer sealing box; 92, exhaust hole; 93, arc-shaped rubber block; 94, limit cover with air hole; 95, limit tube; 96, upper connecting rod; 97, U-shaped pipe; 98, positioning ring; 99, one-way valve; 910, counterweight ring. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0049] Embodiment 1

[0050] like Figure 1-Figure 15 As shown, this embodiment provides a plasma welding device for press-fit rivets for differential gears, comprising a workbench 1, a welding support rod 3 is fixedly connected to the upper surface of the workbench 1, an L-shaped mounting block 5 is arranged on one side of the welding support rod 3, a plasma welding gun 4 is installed at one end of the L-shaped mounting block 5, and two support plates 2 are fixedly connected to the bottom surface of the workbench 1;

[0051] The surface of the workbench 1 is provided with a grinding assembly 6, which includes a grinding disc 65, a grinding motor 62, an upper cross bar 66, a vertical bar 67, a tilting rod 68, a longitudinal slide bar 69, a hollow rod 610, a first hydraulic push rod 611, a connecting plate 612, a lower cross bar 634, a linkage shaft 626, a conveyor belt 627, a conveyor roller 628, a first drive motor 629, a built-in rectangular slide 623, a counterweight 61, a grinding shaft 63, a first bearing 64, a grinding disc 65, a first rectangular rod sleeve 614, a first built-in light rod 615, a first tooth plate 616, a second tooth plate 617, a first magnet 618, an iron pressure plate 619, a long gear 620, a built-in rotating shaft 621, a second magnet 622, a third magnet 624, a horizontal optical axis 630 and a side baffle 633. The second rectangular slide groove 631 provided on the upper surface of the workbench 1 is inserted into A built-in rectangular slide 623 is provided, and the built-in rectangular slide 623 is slidingly connected to the workbench 1. Two conveying rollers 628 are arranged inside the second rectangular slide 631. The surfaces of the two conveying rollers 628 are sleeved with conveyor belts 627. The two conveying rollers 628 are connected through the conveyor belts 627. The rotating shafts of the two conveying rollers 628 are respectively inserted into two rotating holes opened on the front surface of the workbench 1. The conveying rollers 628 and the workbench 1 are rotatably connected. A first driving motor 629 is installed on the front surface of the workbench 1. The output shaft of the first driving motor 629 is fixedly connected to the end of the rotating shaft of one of the conveying rollers 628. A linkage shaft 626 is inserted into the built-in longitudinal groove 625 opened inside the built-in rectangular slide 623. The linkage shaft 626 and the built-in rectangular slide 623 are slidably connected, and one end of the linkage shaft 626 is fixedly connected to one side of the conveyor belt 627.

[0052] The upper surface of the workbench 1 is fixedly connected to a first built-in polished rod 615, the surface of the first built-in polished rod 615 is sleeved with a first rectangular rod sleeve 614, the first rectangular rod sleeve 614 and the first built-in polished rod 615 are slidably connected, the top of the first rectangular rod sleeve 614 is fixedly connected to a counterweight 61, and the two transverse grooves on the surface of the first rectangular rod sleeve 614 are respectively inserted with an upper cross bar 66 and a lower cross bar 634, the upper cross bar 66 is located above the lower cross bar 634, and the upper cross bar 66 and the lower cross bar 634 are both connected to the first rectangular rod sleeve 614. The upper cross bar 66 and the lower cross bar 634 are both fixedly connected to one side of the vertical bar 67. The bottom surface of the upper cross bar 66 is fixedly connected to the grinding motor 62. The end of the output shaft of the grinding motor 62 is fixedly connected to the grinding shaft 63. The bottom end of the grinding shaft 63 is fixedly connected to the grinding disk 65. The surface of the grinding shaft 63 is sleeved with a first bearing 64. The first bearing 64 is installed in a through groove opened on the surface of the lower cross bar 634. The grinding shaft 63 is rotatably connected to the lower cross bar 634 through the first bearing 64.

[0053] The upper surface of the workbench 1 is fixedly connected with a hollow rod 610, and a longitudinal slide rod 69 is inserted in the first rectangular slide groove 613 opened on the upper surface of the hollow rod 610. The longitudinal slide rod 69 and the hollow rod 610 are slidably connected. The side of the vertical rod 67 away from the lower cross bar 634 is fixedly connected with two side baffles 633. A tilting rod 68 is inserted between the two side baffles 633. The other end of the tilting rod 68 is inserted in the groove opened at the top of the longitudinal slide rod 69. The two ends of the tilting rod 68 are respectively connected to the side baffles through axle pins. The plate 633 is rotatably connected to the longitudinal slide bar 69, a connecting plate 612 is inserted into the hollow rod 610, one end of the connecting plate 612 is fixedly connected to the first rectangular rod sleeve 614, the connecting plate 612 is slidably connected to the hollow rod 610, a first hydraulic push rod 611 is installed on the upper surface of the connecting plate 612, the top of the telescopic rod of the first hydraulic push rod 611 is fixedly connected to the bottom end of the longitudinal slide bar 69, a first tooth plate 616 is inserted into the fourth rectangular slide groove 635 opened on the upper surface of the workbench 1, and the first tooth plate 616 is inserted into the fourth rectangular slide groove 635 opened on the upper surface of the workbench 1. 16 is slidably connected to the workbench 1, the top of the first tooth plate 616 is fixedly connected to the connecting plate 612, the interior of the workbench 1 is provided with a third rectangular slide 632 which is connected to the interior of the second rectangular slide 631, the interior of the third rectangular slide 632 is provided with a long gear 620 and a second tooth plate 617, the long gear 620 and the second tooth plate 617 are meshed and connected, the upper surface of the second tooth plate 617 is in contact with the inner wall of the third rectangular slide 632, and the interior of the long gear 620 is provided with a built-in rotating shaft 621 The two ends of the built-in rotating shaft 621 are fixedly connected to the workbench 1, the long gear 620 and the built-in rotating shaft 621 are rotatably connected, the long gear 620 and the first tooth plate 616 are meshed and connected, the two ends of the second tooth plate 617 are respectively fixedly connected with the first magnet 618 and the second magnet 622, the built-in rectangular slide 623 is fixedly connected with the third magnet 624 on one side close to the second magnet 622, and an iron pressure plate 619 is arranged inside the third rectangular slide groove 632, and the iron pressure plate 619 is fixedly connected to the workbench 1.

[0054] Two transverse optical axes 630 are fixedly connected to one side of the built-in rectangular slide plate 623 . The two transverse optical axes 630 respectively pass through one side of the workbench 1 transversely. The transverse optical axes 630 and the workbench 1 are slidably connected.

[0055] A spraying assembly 7 is arranged above the workbench 1, and the spraying assembly 7 includes a spray gun 73, a second rectangular rod sleeve 71, a rectangular connecting rod 72, an infrared proximity sensor 74, a storage box 75, a conveying pipe 76, a second built-in light rod 77, a linkage plate 78 and a rectangular fixed rod 79. A linkage plate 78 is arranged inside the second rectangular slide 631, and a built-in partition plate 710 is arranged between the linkage plate 78 and the built-in rectangular slide plate 623. The built-in partition plate 710 is fixedly connected to the workbench 1, and the linkage plate 78 is slidably connected to the workbench 1. The end of the linkage shaft 626 away from the conveyor belt 627 is inserted into a through hole opened on the surface of the linkage plate 78, and the linkage shaft 626 is slidably connected to the linkage plate 78. The linkage plate 78 is in the first embedding groove 711 opened on one side away from the built-in partition plate 710. A rectangular fixed rod 79 is inserted, and the rectangular fixed rod 79 and the linkage plate 78 are slidably connected. The side of the rectangular fixed rod 79 away from the linkage plate 78 is fixedly connected with the second rectangular rod sleeve 71, and a second built-in light rod 77 is inserted inside the second rectangular rod sleeve 71. The second built-in light rod 77 and the second rectangular rod sleeve 71 are slidably connected. The bottom end of the second built-in light rod 77 is fixedly connected to the workbench 1, and the top of the second rectangular rod sleeve 71 is fixedly connected with a rectangular connecting rod 72. A spray gun 73 is installed in the longitudinal hole opened on the upper surface of the rectangular connecting rod 72, and an infrared proximity sensor 74 is installed on the bottom surface of the rectangular connecting rod 72. A storage box 75 is installed on the upper surface of the workbench 1, and a conveying pipe 76 is inserted on the upper surface of the storage box 75. The other end of the conveying pipe 76 is inserted at the feeding end of the spray gun 73.

[0056] The surface of the built-in rectangular slide 623 is provided with a clamping assembly 8, which includes a sleeve 81, a bent connecting rod 816, a sealing cover 86, a circular sealing piston 88, a second hydraulic push rod 89, a rectangular shell 812, an auxiliary shaft 814, a built-in square rod 817, a bottom disc 82, an L-shaped support rod 83, an auxiliary slide 85, a second drive motor 87, a middle connecting rod 810, a circular fixing rod 811, a rubber clamping claw 815, a spring 818, a square frame plate 819, a built-in disc 822 and a second bearing 823. The top of the built-in rectangular slide 623 is provided with a sleeve 81, a sleeve 82, a bent connecting rod 816, a sealing cover 86, a circular sealing piston 88, a second hydraulic push rod 89, a rectangular shell 812, an auxiliary rotating shaft 814, a built-in square rod 817, a bottom disc 82, an L-shaped support rod 83, an auxiliary slide 85, a second drive motor 87, a middle connecting rod 810, a circular fixing rod 811, a rubber clamping claw 815, a spring 818, a square frame plate 819, a built-in disc 822 and a second bearing 823. The bottom end of the sleeve 81 is fixedly connected to the bottom disc 82, the bottom surface of the bottom disc 82 is fixedly connected to the built-in disc 822, the circumferential surface of the built-in disc 822 is sleeved with a second bearing 823, the surface of the outer ring of the second bearing 823 is fixedly connected to four L-shaped support rods 83, the bottom end of the L-shaped support rod 83 is fixedly connected to the built-in rectangular slide 623, the built-in disc 822 is rotatably connected to the second bearing 823 and the L-shaped support rod 83, the upper surface of the built-in rectangular slide 623 is installed with a second drive motor 87, and the end of the output shaft of the second drive motor 87 is fixedly connected to the bottom surface of the built-in disc 822.

[0057] A built-in square rod 817 is arranged inside the pipe sleeve 81. A square frame plate 819 and a rectangular shell 812 are sleeved on the surface of the built-in square rod 817. The square frame plate 819 and the built-in square rod 817 are fixedly connected. The rectangular shell 812 and the built-in square rod 817 are slidably connected. The square frame plate 819 is slidably connected inside the rectangular shell 812. A spring 818 is sleeved on the surface of the built-in square rod 817. The two ends of the spring 818 are respectively fixedly connected to the square frame plate 819 and the rectangular shell 812. Two symmetrically arranged bending connecting rods 816 are inserted into the mounting groove 820 opened at the top of the built-in square rod 817. The two bending connecting rods 816 are rotatably connected to the built-in square rod 817 through a pin shaft. Auxiliary rotating shafts 814 are respectively inserted into the arc-shaped through grooves 821 opened inside the two bending connecting rods 816. The two auxiliary rotating shafts 814 are respectively located in the second embedded grooves 813 opened on the upper surface of the rectangular shell 812. The auxiliary rotating shafts 814 and the bending connecting rods 81 6 is movably connected, the adjacent sides of the tops of the two bent connecting rods 816 are respectively fixedly connected with rubber clamping claws 815, the bottom end of the built-in square rod 817 is fixedly connected with four circular fixed rods 811 in a ring array, and the end of the circular fixed rod 811 away from the built-in square rod 817 is fixedly connected to the pipe sleeve 81, a sealing cover 86 is arranged below the rectangular shell 812, and two middle connecting rods 810 are fixedly connected between the sealing cover 86 and the rectangular shell 812, a circular sealing piston 88 is inserted inside the sealing cover 86, and the circular sealing piston 88 is sealingly and slidingly connected to the sealing cover 86, a second hydraulic push rod 89 is installed on the upper surface of the bottom disc 82, and the end of the telescopic rod of the second hydraulic push rod 89 is fixedly connected to the circular sealing piston 88, and the two auxiliary slides 84 opened inside the pipe sleeve 81 are respectively inserted with auxiliary slide plates 85, and the auxiliary slide plate 85 is slidably connected to the pipe sleeve 81, and the adjacent ends of the two auxiliary slide plates 85 are respectively fixedly connected to the sealing cover 86.

[0058] A pressure stabilizing component 9 is provided on the surface of the sealing cover 86, and the pressure stabilizing component 9 includes a transfer sealing box 91, an arc-shaped rubber block 93, a limit cover 94 with air holes, a limit tube 95, an upper connecting rod 96, a U-shaped pipe 97, a positioning ring 98, a one-way valve 99 and a counterweight ring 910. The air holes opened on the upper surface of the sealing cover 86 are installed with the one-way valve 99, the circumferential surface of the sealing cover 86 is fixedly connected with the transfer sealing box 91, the upper surface of the transfer sealing box 91 is fixedly connected with the limit cover 94 with air holes, the upper surface of the limit cover 94 with air holes is longitudinally inserted with a limit tube 95, the limit tube 95 and the limit cover 94 with air holes are fixedly connected, the interior of the limit tube 95 is inserted with an upper connecting rod 96, the upper connecting rod 96 and the limit tube The limiting tube 95 is slidably connected, and the bottom end of the upper connecting rod 96 is fixedly connected with an arc-shaped rubber block 93. The surface of the upper connecting rod 96 is sleeved with a positioning ring 98 and a counterweight ring 910. The positioning ring 98 is located above the limiting tube 95, and the counterweight ring 910 is located above the positioning ring 98. The positioning ring 98 and the upper connecting rod 96 are fixedly connected, and the counterweight ring 910 and the upper connecting rod 96 are slidably connected. The surface of the arc-shaped rubber block 93 fits the groove wall of the exhaust hole 92 on the upper surface of the transfer sealing box 91. A U-shaped pipe 97 is inserted on the upper surface of the transfer sealing box 91. The end of the U-shaped pipe 97 away from the transfer sealing box 91 is inserted on the upper surface of the sealing cover 86, and the transfer sealing box 91 is connected to the inside of the sealing cover 86 through the U-shaped pipe 97.

[0059] Embodiment 2: This embodiment provides a plasma welding process for a press-fit rivet for a differential, comprising the following steps:

[0060] Step 1: Loading and clamping: Place the press-fit rivet between the two rubber clamping jaws 815 to make it fit with the top of the pipe sleeve 81, start the second hydraulic push rod 89, push the circular sealing piston 88 upward, drive the relevant parts of the sealing cover 86 to move, and make the bent connecting rod 816 rotate to clamp the press-fit rivet. During the process, the principle of air pressure balance is used to ensure that the clamping force is appropriate and stable through the connection between the transfer sealing box 91 and the sealing cover 86 and the arc-shaped rubber block 93 and other parts;

[0061] Step 2: grinding. Turn on the first drive motor 629, and drive the built-in rectangular slide 623 to move through the conveyor belt 627 and the linkage shaft 626. When the press-fit rivet is in place, start the grinding motor 62 and the second drive motor 87. The grinding motor 62 drives the grinding disc 65 to rotate, and cooperates with the second drive motor 87 to rotate the press-fit rivet. At the same time, the grinding disc 65 is driven to move by the first hydraulic push rod 611 and the related mechanical structure to complete the grinding of the position to be welded. After the grinding is completed, the related components are reset;

[0062] Step 3: Spraying: During the movement of the linkage shaft 626, the infrared proximity sensor 74 is driven to move up and down according to its position change. When the press-fit rivet approaches the sensor and enters the close range, the spray gun 73 is triggered to start, and the permeability enhancer in the storage box 75 is sprayed out by the spray gun 73 through the delivery pipe 76 and coated on the polished welding part of the press-fit rivet. When the press-fit rivet leaves, the spray gun 73 stops.

[0063] Step 4: Welding: The conveyor belt 627 continues to rotate to deliver the press-fit rivet to the end of the plasma welding gun 4. The plasma welding gun 4 introduces working gas and applies high voltage to generate plasma. The plasma melts the metal with its high temperature and high energy characteristics, and welds the pre-treated press-fit rivet.

[0064] Step 5: Cutting and welding are completed. The one-way valve 99 allows external air to enter the sealing cover 86, the circular sealing piston 88 is reset, and the press-fit rivet is released to prepare for the next round of processing.

[0065] How it works

[0066] The first drive motor 629 is turned on. The first drive motor 629 is controlled by an encoder to ensure the operation accuracy. The output shaft of the first drive motor 629 drives the conveying roller 628 to rotate. Since the two conveying rollers 628 are connected by the conveying belt 627, the two conveying rollers 628 rotate synchronously.

[0067] The rotation of the conveyor belt 627 drives the linkage shaft 626 to move synchronously. The linkage shaft 626 is inserted into the built-in longitudinal groove 625 of the built-in rectangular slide 623, driving the built-in rectangular slide 623 to slide in the second rectangular slide groove 631 opened on the upper surface of the workbench 1. At the same time, under the auxiliary guidance of the two transverse optical axes 630, the built-in rectangular slide 623 is ensured to move horizontally and smoothly.

[0068] When the built-in rectangular slide 623 moves to the point where the third magnet 624 and the second magnet 622 fixed on one side thereof are in contact with each other, the second tooth plate 617 is driven to move synchronously with the movement of the built-in rectangular slide 623, and the second tooth plate 617 is meshed with the long gear 620, driving the long gear 620 to rotate, and the long gear 620 is meshed with the first tooth plate 616, thereby driving the first tooth plate 616 to move downward, and the movement of the first tooth plate 616 drives the connecting plate 612 to move downward, and the connecting plate 612 drives the first rectangular rod sleeve 614 to slide downward on the surface of the first built-in smooth rod 615, and at the same time drives the first hydraulic push rod 611 to move downward, and the movement of the first hydraulic push rod 611 drives the longitudinal slide bar 69 to move downward, so that the longitudinal slide bar 69 and the first rectangular rod sleeve 614 move downward synchronously, and at this time the upper cross bar 66 does not slide inside the first rectangular rod sleeve 614.

[0069] When the press-fit rivet moves to a suitable position and the grinding disc 65 is attached to the surface of the press-fit rivet to be polished, the linkage shaft 626 moves to the leftmost end, and the first drive motor 629 stops running at this time, and then the grinding motor 62 and the second drive motor 87 are started. The operation of the second drive motor 87 drives the press-fit rivet inside the pipe sleeve 81 to rotate, and the operation of the grinding motor 62 drives the grinding shaft 63 to rotate, and the grinding shaft 63 drives the grinding disc 65 to rotate, and the operation of the first hydraulic push rod 611 drives the longitudinal slide bar 69 to slide longitudinally, and then the tilting rod 68 can be driven to move. The rotation of the grinding disc 65 drives the vertical rod 67 to move through the tilting rod 68, and then the upper cross bar 66 and the lower cross bar 634 slide inside the first rectangular rod sleeve 614, so as to achieve the effect of driving the grinding disc 65 to move. With the rotation of the press-fit rivet, and the rotating grinding disc 65 moves in contact with the press-fit rivet, the position of the press-fit rivet to be welded is polished;

[0070] Under the action of the first bearing 64, the action force between the grinding disc 65 and the press-fit rivet is prevented from damaging the grinding motor 62;

[0071] After the grinding is completed, the first driving motor 629 continues to run, so that the linkage shaft 626 continues to rotate with the conveyor belt 627. At this time, the linkage shaft 626 slides inside the built-in longitudinal groove 625, so that the linkage shaft 626 moves to the bottom, and the built-in rectangular slide plate 623 moves in a direction away from the second magnet 622. Since the surfaces of the second magnet 622 and the third magnet 624 fit together, under the action of the magnetic attraction, the movement of the built-in rectangular slide plate 623 drives the second tooth plate 617 to move, and then drives the first magnet 618 to move until it fits the surface of the iron pressure plate 619. Under the action of the magnetic attraction, the position of the second tooth plate 617 is fixed, and at this time, the second magnet 622 and the third magnet 624 are separated, and the movement of the second tooth plate 617 drives the long gear 620 to rotate, and then drives the first tooth plate 616 to move upward, so that the longitudinal slide bar 69 and the first rectangular rod sleeve 614 move upward synchronously, and under the action of the retraction of the telescopic rod of the first hydraulic push rod 611, the grinding disc 65 can be reset;

[0072] The polished rivet provides a clean surface with suitable roughness for the spraying assembly 7, which is conducive to the adhesion of the transmittance enhancer;

[0073] When the linkage shaft 626 moves from right to left, the linkage shaft 626 is in a higher position, driving the linkage plate 78 to move synchronously. The linkage plate 78 slides on the surface of the rectangular fixed rod 79. During this process, the press-fit rivet is moving because the distance between the press-fit rivet and the infrared proximity sensor 74 is far, and the spray gun 73 does not operate. When the linkage shaft 626 moves from left to right, the linkage shaft 626 is in a lower position, causing the linkage plate 78 to move downward. The movement of the linkage plate 78 drives the rectangular fixed rod 79 to move downward, and then the second rectangular rod sleeve 71 moves downward. The movement of the second rectangular rod sleeve 71 drives the infrared proximity sensor 74 to move downward. When the built-in rectangular slide 623 drives the press-fit rivet above it to pass under the infrared proximity sensor 74, the infrared proximity sensor 74 detects the approach of an object using the reflection principle of infrared rays. The infrared ray is emitted. When the press-fit rivet approaches, the infrared ray is reflected back. When the sensor receives the reflected light, a signal change is generated. When the press-fit rivet passes within the close range of the infrared proximity sensor 74, the infrared proximity sensor 74 outputs a signal to trigger the spray gun 73 to start. The transmittance enhancer in the storage box 75 is transported to the spray gun 73 through the delivery pipe 76 and sprayed on the position of the press-fit rivet to be welded and polished. When the press-fit rivet leaves this close range, the signal changes and the spray gun 73 is controlled to stop, thereby achieving the effect of spraying the transmittance enhancer on the press-fit rivet. Usually, there is an adjustment screw on the infrared proximity sensor 74. By rotating the screw, the inductance value or magnetic field distribution of the internal coil can be changed, thereby adjusting the detection distance. Rotating the screw clockwise may increase the detection distance, while rotating it counterclockwise may reduce the detection distance, thereby accurately controlling the start timing of the spray gun 73.

[0074] The storage box 75 is equipped with a small pump device inside. When the start signal of the spray gun 73 is received, the pump starts to work, extracts the permeability enhancer from the storage box 75 and presses it into the spray gun 73 through the delivery pipe 76. This pump can be a peristaltic pump, a diaphragm pump, etc., which can accurately control the flow rate of the permeability enhancer to meet different spraying requirements. The spray gun 73 usually has a nozzle. The internal structure of the nozzle is designed to atomize the inflowing permeability enhancer. When the permeability enhancer enters the spray gun 73, the special structure at the nozzle, such as a small spray hole or an atomizing device with a high-speed airflow, disperses the permeability enhancer into tiny droplets.

[0075] As the conveyor belt 627 rotates, the linkage shaft 626 moves synchronously, so that the press-fit rivet moves to the end position of the plasma welding gun 4. The press-fit rivet can be welded by the operation of the plasma welding gun 4, and the welding position is polished and sprayed with a permeability enhancer in advance to promote the welding effect.

[0076] The plasma welding gun 4 has an electrode, usually a tungsten electrode, and a nozzle. When working, firstly, a working gas, usually an inert gas such as argon, is introduced between the electrode and the nozzle. When a high voltage is applied between the electrode and the workpiece differential press-fit rivet, the gas is ionized. For example, under the action of a high electric field, the outer electrons of argon atoms will break away from the bondage of the nucleus to form free electrons and positively charged ions. These free electrons, ions and some unionized gas atoms together constitute plasma. Plasma has a very high energy density because it is a highly ionized gas state, in which the ions and electrons have very high kinetic energy, and the temperature of the plasma is extremely high, which can reach tens of thousands of degrees Celsius. This high temperature enables it to easily melt metal materials.

[0077] The work of the spraying component 7 depends on the clean and suitable surface provided by the polishing component 6. Only on such a surface can the transmittance enhancer be better attached and function;

[0078] Before grinding and spraying the anti-permeability agent on the workpiece, the press-fit rivet is placed between the two rubber clamps 815, and the press-fit rivet is fitted with the top of the pipe sleeve 81. By starting the second hydraulic push rod 89, the operation of the second hydraulic push rod 89 drives the circular sealing piston 88 to move upward, so that the gas above the sealing cover 86 is squeezed, thereby driving the sealing cover 86 to move. The movement of the sealing cover 86 drives the rectangular shell 812 to move through the middle connecting rod 810, and then drives the two bent connecting rods 816 to rotate inside the installation groove 820 through the auxiliary rotating shaft 814, so as to achieve the effect of clamping the press-fit rivet. The setting of the spring 818 can make the two bent connecting rods 816 automatically open after the processing of the press-fit rivet is completed, so as to release the clamping limit of the press-fit rivet;

[0079] In the process of clamping the press-fit rivet, the circular sealing piston 88 continues to move upward with the operation of the second hydraulic push rod 89. When the force of the two rubber clamping claws 815 to clamp the press-fit rivet is appropriate, the air pressure inside the sealing cover 86 continues to increase as the circular sealing piston 88 moves upward. Since the transfer sealing box 91 and the sealing cover 86 are connected under the action of the U-shaped pipe 97, the air pressure inside the transfer sealing box 91 and the sealing cover 86 is the same. When the air pressure inside the sealing cover 86 increases, the transfer sealing box 91 The air pressure force applied to the arc-shaped rubber block 93 inside is continuously increased. When the air pressure reaches a certain value, the gas inside the transfer sealing box 91 flows out along the gap between the arc-shaped rubber block 93 and the exhaust hole 92, so that the air pressure inside the sealing cover 86 reaches a certain range and is in a balanced state, until the telescopic rod of the second hydraulic push rod 89 is extended to the maximum distance, so that the circular sealing piston 88 is in a static state, thereby clamping the press-fit rivet and avoiding the situation where the press-fit rivet is damaged by a large clamping force;

[0080] The one-way valve 99 is provided to allow external gas to flow into the interior of the sealing cover 86 after the clamping of the press-fit rivet is released, thereby resetting the position of the circular sealing piston 88 and facilitating the clamping of the next press-fit rivet again.

[0081] Through the above series of precise and coordinated operation steps, the welding position of the press-fit rivets is first polished and sprayed with a permeability enhancer before welding, which effectively improves the plasma welding effect of the press-fit rivets for the differential, ensures the welding quality, and meets the high-performance manufacturing requirements of the differential.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plasma welding process for press-fit rivets for differentials, characterized in that: The following steps are involved: Step 1: Loading and clamping: Place the press-fit rivet between the two rubber clamping jaws (815) so that it fits the top of the pipe sleeve (81), start the second hydraulic push rod (89), push the circular sealing piston (88) upward, drive the relevant parts of the sealing cover (86) to move, and make the bent connecting rod (816) rotate to clamp the press-fit rivet. During the process, the principle of air pressure balance is used to ensure that the clamping force is appropriate and stable through the connection between the transfer sealing box (91) and the sealing cover (86) and the arc-shaped rubber block (93) and other parts; Step 2: grinding. Turn on the first drive motor (629), and drive the built-in rectangular slide plate (623) to move via the conveyor belt (627) and the linkage shaft (626). When the pressed rivet is in place, start the grinding motor (62) and the second drive motor (87). The grinding motor (62) drives the grinding disc (65) to rotate, and cooperates with the second drive motor (87) to rotate the pressed rivet. At the same time, the grinding disc (65) is driven to move by the first hydraulic push rod (611) and the related mechanical structure to complete the grinding of the position to be welded. After the grinding is completed, the related components are reset. Step 3: spraying. During the movement of the linkage shaft (626), the infrared proximity sensor (74) is driven to move up and down according to its position change. When the press-fit rivet approaches the sensor and enters the close range, the spray gun (73) is triggered to start. The permeability enhancer in the storage box (75) is sprayed out by the spray gun (73) through the delivery pipe (76) and coated on the polished welding part of the press-fit rivet. When the press-fit rivet leaves, the spray gun (73) stops. Step 4: welding. The conveyor belt (627) continues to rotate to deliver the press-fit rivet to the end of the plasma welding gun (4). The plasma welding gun (4) is fed with working gas and a high voltage is applied to generate plasma. The plasma melts the metal by virtue of its high temperature and high energy characteristics, and the pre-treated press-fit rivet is welded. Step 5: Cutting and welding are completed. The one-way valve (99) allows external air to enter the sealing cover (86). The circular sealing piston (88) is reset, and the press-fit rivet is released to prepare for the next round of processing.

2. The plasma welding process for press-fit rivets for differential according to claim 1, characterized in that: The plasma welding process uses a plasma welding device for differential press-fit rivets, the welding device comprising a workbench (1), the upper surface of the workbench (1) being fixedly connected to a welding support rod (3), one side of the welding support rod (3) being provided with an L-shaped mounting block (5), one end of the L-shaped mounting block (5) being mounted with a plasma welding gun (4), and the bottom surface of the workbench (1) being fixedly connected to two support plates (2); The surface of the workbench (1) is provided with a grinding assembly (6), and the grinding assembly (6) comprises a grinding disc (65) arranged above the workbench (1) and a grinding motor (62) for grinding the pressed rivet by means of the grinding disc (65), an upper cross bar (66), a vertical bar (67), an inclined bar (68), a longitudinal sliding bar (69), a hollow bar (610), a first hydraulic push rod (611), a connecting plate (612), a lower cross bar (634), a linkage shaft (626), a conveyor belt (627), a conveyor roller (628), a first driving motor (629) and a built-in rectangular slide plate (623); A spraying assembly (7) is arranged above the workbench (1), and the spraying assembly (7) comprises a spray gun (73) arranged above the workbench (1), a second rectangular rod sleeve (71) for spraying a permeability enhancer on the press-fit rivet through the spray gun (73), a rectangular connecting rod (72), an infrared proximity sensor (74), a storage box (75), a conveying pipe (76), a linkage plate (78) and a rectangular fixing rod (79); A clamping assembly (8) is arranged on the surface of the built-in rectangular slide plate (623), and the clamping assembly (8) comprises a pipe sleeve (81) arranged above the built-in rectangular slide plate (623), two bent connecting rods (816) symmetrically arranged inside the pipe sleeve (81), a sealing cover (86) for clamping the press-fit rivet through the two bent connecting rods (816), a circular sealing piston (88), a second hydraulic push rod (89), a rectangular housing (812), an auxiliary rotating shaft (814) and a built-in square rod (817); A pressure stabilizing assembly (9) is arranged on the surface of the sealing cover (86), and the pressure stabilizing assembly (9) comprises a transfer sealing box (91) arranged on the surface of the sealing cover (86), an arc-shaped rubber block (93) for clamping the press-fit rivet with appropriate force, an upper connecting rod (96), a positioning ring (98), a one-way valve (99) and a counterweight ring (910).

3. The plasma welding process for press-fit rivets for differential according to claim 2, characterized in that: A built-in rectangular slide (623) is inserted into a second rectangular slide groove (631) opened on the upper surface of the workbench (1), and the built-in rectangular slide groove (623) is slidably connected to the workbench (1). Two conveying rollers (628) are arranged inside the second rectangular slide groove (631), and a conveying belt (627) is sleeved on the surface of the two conveying rollers (628). The two conveying rollers (628) are connected by transmission through the conveying belt (627), and the rotating shafts of the two conveying rollers (628) are respectively inserted into two rotating holes opened on the front surface of the workbench (1). The conveying roller (628) and the workbench (1) are rotatably connected, a first driving motor (629) is installed on the front surface of the workbench (1), the output shaft of the first driving motor (629) is fixedly connected to the end of the rotating shaft of one of the conveying rollers (628), a linkage shaft (626) is inserted into the built-in longitudinal groove (625) opened inside the built-in rectangular slide (623), the linkage shaft (626) and the built-in rectangular slide (623) are slidably connected, and one end of the linkage shaft (626) is fixedly connected to one side of the conveyor belt (627).

4. The plasma welding process for press-fit rivets for differential according to claim 3 is characterized in that: The upper surface of the workbench (1) is fixedly connected with a first built-in polished rod (615), the surface of the first built-in polished rod (615) is sleeved with a first rectangular rod sleeve (614), the first rectangular rod sleeve (614) and the first built-in polished rod (615) are slidably connected, the top of the first rectangular rod sleeve (614) is fixedly connected with a counterweight block (61), and two transverse grooves on the surface of the first rectangular rod sleeve (614) are respectively inserted with an upper cross bar (66) and a lower cross bar (634), the upper cross bar (66) is located above the lower cross bar (634), and the upper cross bar (66) and the lower cross bar (634) are both connected to the first rectangular rod The upper cross bar (66) and the lower cross bar (634) are both fixedly connected to one side of the vertical bar (67); the bottom surface of the upper cross bar (66) is fixedly connected to a grinding motor (62); the end of the output shaft of the grinding motor (62) is fixedly connected to a grinding shaft (63); the bottom end of the grinding shaft (63) is fixedly connected to a grinding disc (65); the surface of the grinding shaft (63) is sleeved with a first bearing (64); the first bearing (64) is installed in a through groove opened on the surface of the lower cross bar (634); the grinding shaft (63) is rotatably connected to the lower cross bar (634) through the first bearing (64).

5. The plasma welding process for press-fit rivets for differential according to claim 4, characterized in that: The upper surface of the workbench (1) is fixedly connected with a hollow rod (610), and a longitudinal slide rod (69) is inserted in a first rectangular slide groove (613) opened on the upper surface of the hollow rod (610), and the longitudinal slide rod (69) and the hollow rod (610) are slidably connected, and the side of the vertical rod (67) away from the lower cross rod (634) is fixedly connected with two side baffles (633), and a tilting rod (68) is inserted between the two side baffles (633), and the other end of the tilting rod (68) is inserted in a groove opened at the top of the longitudinal slide rod (69), and the two ends of the tilting rod (68) are respectively connected to the side baffles by axle pins. (633) and the longitudinal slide bar (69) are rotatably connected, a connecting plate (612) is inserted into the interior of the hollow rod (610), one end of the connecting plate (612) is fixedly connected to the first rectangular rod sleeve (614), the connecting plate (612) and the hollow rod (610) are slidably connected, a first hydraulic push rod (611) is installed on the upper surface of the connecting plate (612), the top end of the telescopic rod of the first hydraulic push rod (611) is fixedly connected to the bottom end of the longitudinal slide bar (69), a first tooth plate (616) is inserted into the fourth rectangular slide groove (635) opened on the upper surface of the workbench (1), and the first tooth plate (616) is inserted into the fourth rectangular slide groove (635) opened on the upper surface of the workbench (1) 16) is slidably connected to the workbench (1), the top of the first tooth plate (616) is fixedly connected to the connecting plate (612), the interior of the workbench (1) is provided with a third rectangular slide groove (632) which is connected to the interior of the second rectangular slide groove (631), the interior of the third rectangular slide groove (632) is provided with a long gear (620) and a second tooth plate (617), the long gear (620) and the second tooth plate (617) are meshingly connected, the upper surface of the second tooth plate (617) is in contact with the inner wall of the third rectangular slide groove (632), and the interior of the long gear (620) is inserted with a built-in rotating shaft (621), The two ends of the built-in rotating shaft (621) are fixedly connected to the workbench (1), the long gear (620) and the built-in rotating shaft (621) are rotatably connected, the long gear (620) and the first tooth plate (616) are meshingly connected, the two ends of the second tooth plate (617) are respectively fixedly connected with the first magnet (618) and the second magnet (622), the built-in rectangular slide plate (623) is fixedly connected with the third magnet (624) on one side close to the second magnet (622), and an iron pressure plate (619) is arranged inside the third rectangular slide groove (632), and the iron pressure plate (619) is fixedly connected to the workbench (1).

6. The plasma welding process for press-fit rivets for differential according to claim 5, characterized in that: Two transverse optical axes (630) are fixedly connected to one side of the built-in rectangular slide plate (623), and the two transverse optical axes (630) respectively pass through one side of the workbench (1) transversely, and the transverse optical axes (630) and the workbench (1) are slidably connected.

7. The plasma welding process for press-fit rivets for differential according to claim 6, characterized in that: A linkage plate (78) is provided inside the second rectangular slide groove (631), a built-in partition plate (710) is provided between the linkage plate (78) and the built-in rectangular slide plate (623), the built-in partition plate (710) is fixedly connected to the workbench (1), the linkage plate (78) and the workbench (1) are slidably connected, the end of the linkage shaft (626) away from the conveyor belt (627) is inserted into a through hole opened on the surface of the linkage plate (78), the linkage shaft (626) and the linkage plate (78) are slidably connected, a rectangular fixing rod (79) is inserted into a first embedding groove (711) opened on one side of the linkage plate (78) away from the built-in partition plate (710), the rectangular fixing rod (79) and the linkage plate (78) are slidably connected, the rectangular fixing rod (79) is away from the linkage plate (7 8) is fixedly connected to one side of the workbench (1), a second rectangular rod sleeve (71) is inserted into the interior of the second rectangular rod sleeve (71), the second built-in polished rod (77) and the second rectangular rod sleeve (71) are slidably connected, the bottom end of the second built-in polished rod (77) is fixedly connected to the workbench (1), the top end of the second rectangular rod sleeve (71) is fixedly connected to a rectangular connecting rod (72), a spray gun (73) is installed in the longitudinal hole opened on the upper surface of the rectangular connecting rod (72), an infrared proximity sensor (74) is installed on the bottom surface of the rectangular connecting rod (72), a storage box (75) is installed on the upper surface of the storage box (75), a conveying pipe (76) is inserted into the upper surface of the storage box (75), and the other end of the conveying pipe (76) is inserted into the feeding end of the spray gun (73).

8. The plasma welding process for press-fit rivets for differential according to claim 7, characterized in that: A pipe sleeve (81) is arranged above the built-in rectangular slide (623), the bottom end of the pipe sleeve (81) is fixedly connected to a bottom disc (82), the bottom surface of the bottom disc (82) is fixedly connected to a built-in disc (822), the circumferential surface of the built-in disc (822) is sleeved with a second bearing (823), the surface of the outer ring of the second bearing (823) is fixedly connected to four L-shaped support rods (83), the bottom end of the L-shaped support rod (83) is fixedly connected to the built-in rectangular slide (623), the built-in disc (822) is rotatably connected via the second bearing (823) and the L-shaped support rod (83), a second drive motor (87) is installed on the upper surface of the built-in rectangular slide (623), and the end of the output shaft of the second drive motor (87) is fixedly connected to the bottom surface of the built-in disc (822).

9. The plasma welding process for press-fit rivets for differential according to claim 8, characterized in that: The pipe sleeve (81) is provided with a built-in square rod (817) inside, and the surface of the built-in square rod (817) is sleeved with a square frame plate (819) and a rectangular shell (812), the square frame plate (819) and the built-in square rod (817) are fixedly connected, the rectangular shell (812) and the built-in square rod (817) are slidably connected, the square frame plate (819) is slidably connected inside the rectangular shell (812), and the surface of the built-in square rod (817) is sleeved with a spring (818), and the two ends of the spring (818) are respectively connected to the square frame plate (819) and the rectangular shell. The rectangular housing (812) is fixedly connected to the housing (812), two symmetrically arranged bending connecting rods (816) are inserted into the installation groove (820) opened at the top of the built-in square rod (817), and the two bending connecting rods (816) are rotatably connected to the built-in square rod (817) through a pin shaft, and auxiliary rotating shafts (814) are respectively inserted into the arc-shaped through grooves (821) opened inside the two bending connecting rods (816), and the two auxiliary rotating shafts (814) are respectively located in the second embedding grooves (813) opened on the upper surface of the rectangular housing (812), and the auxiliary rotating shafts (814) and the bending connecting rods (816) are respectively connected to the second embedding grooves (813) opened on the upper surface of the rectangular housing (812). 16) movably connected, the adjacent sides of the tops of the two bent connecting rods (816) are respectively fixedly connected with rubber clamps (815), the bottom end of the built-in square rod (817) is fixedly connected with four circular fixed rods (811) in a ring array, the end of the circular fixed rod (811) away from the built-in square rod (817) is fixedly connected to the pipe sleeve (81), a sealing cover (86) is arranged below the rectangular shell (812), two middle connecting rods (810) are fixedly connected between the sealing cover (86) and the rectangular shell (812), and the inner part of the sealing cover (86) is fixedly connected to the inner part of the sealing cover (86). A circular sealing piston (88) is inserted into the bottom, and the circular sealing piston (88) and the sealing cover (86) are sealed and slidably connected. A second hydraulic push rod (89) is installed on the upper surface of the bottom disc (82), and the end of the telescopic rod of the second hydraulic push rod (89) is fixedly connected to the circular sealing piston (88). Auxiliary slides (85) are respectively inserted into the two auxiliary sliding grooves (84) opened inside the pipe sleeve (81), and the auxiliary slides (85) and the pipe sleeve (81) are slidably connected. The adjacent ends of the two auxiliary slides (85) are respectively fixedly connected to the sealing cover (86).

10. The plasma welding process for press-fit rivets for differential according to claim 9, characterized in that: A one-way valve (99) is installed in the air hole opened on the upper surface of the sealing cover (86); a transfer sealing box (91) is fixedly connected to the circumferential surface of the sealing cover (86); a limit cover (94) with air holes is fixedly connected to the upper surface of the transfer sealing box (91); a limit tube (95) is longitudinally inserted into the upper surface of the limit cover (94) with air holes; the limit tube (95) and the limit cover (94) with air holes are fixedly connected; an upper connecting rod (96) is inserted inside the limit tube (95); the upper connecting rod (96) and the limit tube (95) are slidably connected; an arc-shaped rubber block (93) is fixedly connected to the bottom end of the upper connecting rod (96); a positioning ring (98) is sleeved on the surface of the upper connecting rod (96); ) and a counterweight ring (910), the positioning ring (98) is located above the limiting tube (95), the counterweight ring (910) is located above the positioning ring (98), the positioning ring (98) and the upper connecting rod (96) are fixedly connected, the counterweight ring (910) and the upper connecting rod (96) are slidably connected, the surface of the arc-shaped rubber block (93) fits the groove wall of the exhaust hole (92) on the upper surface of the transfer sealing box (91), a U-shaped pipe (97) is inserted into the upper surface of the transfer sealing box (91), and one end of the U-shaped pipe (97) away from the transfer sealing box (91) is inserted into the upper surface of the sealing cover (86), and the transfer sealing box (91) is connected to the inside of the sealing cover (86) through the U-shaped pipe (97).

Images