Welding positioner for welding processing of bearing retainer and process of welding positioner

Abstract

The invention relates to the technical field of electric arc welding, in particular to a welding positioner for welding a bearing retainer and a process of the welding positioner, the welding positioner comprises a displacement mechanical arm, a plurality of degree-of-freedom joint parts are arranged on the displacement mechanical arm, and intelligent worm devices are arranged at the degree-of-freedom joint parts adopting worm transmission; the intelligent worm device comprises a worm integration device, relative rotation between the large arm and the small arm is achieved at the joint of the welding positioner through the intelligent worm device, the relative rotation at the joint is specifically achieved by driving a main ring gear through a plurality of annularly-arranged pushing and pressing worms, and in the driving process, the main ring gear is driven by the pushing and pressing worms; the contact portions of the multiple annularly-arranged pushing and pressing worms and the main ring gear are lubricated in turn, the pushing and pressing worms disengage from the driving position during lubrication, the remaining pushing and pressing worms continue to drive the main ring gear, in this way, lubrication and driving can be carried out at the same time, and automatic lubrication is achieved in the working deformation process of the welding positioner.

Description

Technical Field

[0001] The present invention relates to the technical field of arc welding, and specifically to a welding positioner and its process for welding and processing a bearing cage. Background Art

[0002] In the processing of bearings, there is a welding process for the bearing cage, the purpose of which is to weld the two ends of the cage curled into a cylindrical shape together. In arc welding processing, an automatic arc welding machine is used. The arc welding machine consists of an arc welding gun and a welding positioner that drives the displacement of the welding gun. The welding positioner can achieve drive control of multiple degrees of freedom, enabling the arc welding gun to move and change direction in space. The welding positioner is a multi-joint robotic arm that deforms by the relative rotation at the joints to drive the movement of the arc welding gun. The relative rotation at the joints is usually achieved by worm drive. The transmission ratio of the worm drive is very large, which makes it very useful in environments where a large transmission ratio is required. The meshing surface between the worm and the gear is relatively large, and the relative sliding speed is relatively low, thereby reducing the noise and vibration during the transmission process and being suitable for machines that require smooth operation. The worm drive also has self-locking, that is, when the driving force acts on the worm wheel, the worm will prevent the reverse rotation of the gear. The worm drive has great advantages in machinery that requires preventing reverse rotation and reaction.

[0003] The worm drive has a relatively large lubrication requirement. Due to the large relative sliding speed between the worm and the gear tooth surface, the friction loss is relatively large, resulting in a relatively low transmission efficiency, and the friction will generate more heat, which may cause transmission failure. Therefore, the worm drive requires good lubrication to reduce friction and dissipate heat.

[0004] Based on the research and development purpose of automatic lubrication of the welding positioner joints, to ensure the smooth deformation of the welding positioner, avoid the deformation jerks caused by insufficient lubrication of the positioner joints, and ensure the accurate displacement and positioning of the arc welding gun, the present invention provides a welding positioner and its process for welding and processing a bearing cage. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding positioner and its process for welding and processing a bearing cage to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding positioner for welding a bearing retainer, comprising a positioner arm, the positioner arm is provided with a plurality of joints of degrees of freedom, and an intelligent worm device is provided at the joints of degrees of freedom using a worm drive, the intelligent worm device comprises a first rotating drum fixedly connected to a rotating small arm on the positioner arm, a main ring gear fixed on the first rotating drum, a first brake shaft driven by a motor installed on a fixed large arm on the positioner arm, and a worm integrated device connected by a transmission between the first brake shaft and the main ring gear, the worm integrated device comprises:

[0007] Centralized control pressure release device, the first brake shaft passes through the middle of the centralized control pressure release device;

[0008] The centralized control pressure generator is surrounded by multiple uniformly arranged driving units;

[0009] The worm unit tool establishes transmission between the driving unit and the main ring gear, and multiple worm units arranged in the ring are self-lubricated in turn;

[0010] A multi-control disc gear, a middle portion of the multi-control disc gear is fixedly connected to the first brake shaft, and the multi-control disc gear transmits a plurality of worm units arranged around it.

[0011] The worm unit comprises:

[0012] A push worm meshing with the main ring gear, an adjustment portion for driving the push worm, and a lap joint group establishing transmission between the adjustment portion and the multi-control plate gear;

[0013] A lubrication group that lubricates the meshing area between the push worm and the main ring gear.

[0014] The adjustment unit includes:

[0015] The unit frame includes a cross and a column rack fixed at one end of the cross, and the unit frame supports and drives the push worm;

[0016] The secondary shaft is movably sleeved in the through hole opened on the unit frame cross, and the long shaft gear is coaxially fixed with the secondary shaft. One end of the push worm is transmitted in a direction-changing manner with the annular bevel gear fixed on the secondary shaft through the fixed bevel gear.

[0017] The lubrication group includes a sponge body in the shape of a worm, an overflow tube cylinder penetrating through the center of the sponge body, an L-shaped moving tube movably sleeved at one end of the opening end of the overflow tube cylinder, a plugging tube cylinder slidably sleeved at the other end of the L-shaped moving tube, and an L-shaped oil supply tube fixedly communicated with one side of the plugging tube cylinder. The end of the L-shaped moving tube in the plugging tube cylinder is blocked, and a door hole is formed in the side shell of the L-shaped moving tube. The L-shaped moving tube moves to connect the door hole and the L-shaped oil supply tube in a communicating manner. A diversion hole is formed in the side shell of the overflow tube cylinder to allow the lubricating oil inside the overflow tube cylinder to seep out. A part of the overflow tube cylinder is also movably sleeved in a through hole formed in the cross of the unit frame, and a bevel gear fixedly installed at the end of the overflow tube cylinder is driven by a fixed bevel gear on the secondary shaft in a direction-changing manner. The sponge body rotates and displaces synchronously by imitating the pushing of the worm.

[0018] The lapping group includes a pressure-applying gear meshing with the multi-control disk gear, a tooth cylinder penetrating through the middle of the pressure-applying gear, a seat frame for limiting and supporting the tooth cylinder, a neck shaft and an extension shaft supported on the seat frame, and an extension gear fixed at one end of the extension shaft. The other end of the extension shaft is driven by a fixed bevel gear in a direction-changing manner with a bevel gear fixed on the neck shaft. The column rack on the unit frame slides through a square hole formed in the seat frame, and the extension gear is in meshing transmission connection with the column rack. The long shaft gear slides through a gear hole formed in the center of the tooth cylinder, and the L-shaped oil supply tube is fixed on the seat frame.

[0019] The centralized control pressure actuator includes an annular gear body fixedly sleeved on the first brake shaft, a central cylinder arranged outside the first brake shaft, a transducer group for establishing transmission between the annular gear body and the central cylinder, an annular plate frame for limiting and supporting the central cylinder, a control cylinder clamped and arranged outside the annular plate frame, a hairspring connected between the central cylinder and the control cylinder, and a plurality of hemispheres evenly and annularly fixed on the bottom surface of the control cylinder.

[0020] The central cylinder is movably sleeved in a circular hole formed in the middle of the annular plate frame. The control cylinder includes a cylinder body and a convex arc backing plate fixed outside the cylinder body. The outer edge of the annular plate frame is clamped into an annular sliding groove formed in the inner side wall of the cylinder body of the control cylinder. The hairspring is fixedly sleeved on the central cylinder, and the outer end of the hairspring is fixed on the control cylinder.

[0021] The transducer group includes a beam position frame fixed on the annular plate frame, a vertical shaft and a small worm supported on the beam position frame, an L-shaped moving body sliding through a square hole formed in the beam position frame, a pressure-holding elastic piece fixed on the beam position frame, a one-way bearing fixedly sleeved at one end of the vertical shaft, and a small ring gear fixedly sleeved outside the one-way bearing. One end of the L-shaped moving body contacts the wave surface arranged on the outer edge of the annular gear body by arranging a convex block. One end of the pressure-holding elastic piece pushes the L-shaped moving body. The L-shaped moving body is in meshing transmission connection with the small ring gear by arranging a row of teeth. The other end of the vertical shaft is driven by a fixed bevel gear in a direction-changing manner with a bevel gear fixed at one end of the small worm. The small worm is in meshing transmission connection with an external gear ring arranged at one end of the central cylinder.

[0022] The driving unit includes a main fixed frame fixedly connected to the seat frame, a J-shaped elastic sheet fixed on the main fixed frame, a strong push shaft movably sleeved in a column hole formed in the main fixed frame, an extension frame fixed to one end of the strong push shaft, a U-shaped plate slidably passing through a plate hole formed in the main fixed frame, and a return elastic sheet with one end resting on the U-shaped plate and the other end fixed to the main fixed frame. The other end of the strong push shaft is in meshing transmission connection with a row of teeth provided on the U-shaped plate through a fixed shaft gear. The U-shaped plate contacts the outer side wall of the control cylinder. The J-shaped elastic sheet intercepts the moving hemisphere. One end of the extension frame is in meshing transmission connection with a shaft gear provided at one end of the neck shaft through an arc-shaped rack.

[0023] A welding process for bearing welding includes the following steps:

[0024] Step 1: The cage prepared by stamping, truncating and curling the steel strip is sleeved outside the inner ring of the bearing, and then the combination of the inner ring of the bearing and the cage is fixed on the metal bed.

[0025] Step 2: Connect the circuit wires externally to the metal bed, and check the circuit safety and the positioning accuracy of the cage.

[0026] Step 3: The welding positioner preheats and deforms itself, eliminates the jerks through self-lubrication at the joints of the robotic arm, and then drives the arc welding gun to move.

[0027] Step 4: The arc-emitting part of the arc welding gun approaches the end of the cage, and then the arc welding gun is powered on. The high-temperature arc generated between the arc welding gun and the metal bed acts on the joint of the cage to achieve welding.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The relative rotation between the large arm and the small arm of the welding positioner is realized through the intelligent worm device provided at the joint. The relative rotation at the joint is specifically realized by driving the main ring gear through multiple circumferentially arranged push worms. During the driving process, the contact parts between the multiple circumferentially arranged push worms and the main ring gear are lubricated in turn. When lubricated, the push worm disengages from the driving position, and the remaining push worms continue to drive the main ring gear. In this way, lubrication and driving can occur simultaneously, and the welding positioner realizes automatic lubrication during the working deformation.

[0030] 2. The present invention accumulates power through the energy conversion group and releases it after the power is sufficient. Subsequently, the driving unit frame is moved to control the synchronous movement of the push worm and the sponge body. The sponge body always imitates the rotation of the push worm to avoid tooth collision between the sponge body and the main ring gear after the sponge body moves. Lubricating oil seeps out from the sponge body meshing with the main ring gear and is smeared on the main ring gear. After the push worm resets and falls back, it meshes with the main ring gear, and a layer of lubricating oil will adhere between the push worm and the main ring gear. Description of the Drawings

[0031] Figure 1 This is a schematic structural diagram of the present invention.

[0032] Figure 2 This is a schematic position diagram of the intelligent worm device.

[0033] Figure 3 This is a schematic structural diagram of the intelligent worm device.

[0034] Figure 4 This is a schematic structural diagram of the worm unit.

[0035] Figure 5 This is a schematic structural diagram of the lubrication group.

[0036] Figure 6 This is a schematic position diagram of the multi-control disk gear.

[0037] Figure 7 This is a schematic structural diagram of the lapping group.

[0038] Figure 8 This is a schematic structural diagram of the centralized control pressure hair tool.

[0039] Figure 9 This is a schematic structural diagram of the energy conversion group.

[0040] Figure 10 This is a schematic structural diagram of the driving unit.

[0041] Figure 11 This is a schematic position diagram of the range extender frame.

[0042] Figure 12 This is a schematic structural diagram of the control cylinder.

[0043] Figure 13 This is a schematic position diagram of the hemisphere.

[0044] In the figure: the displacement robotic arm 1, the intelligent worm device 2, the first rotating cylinder 3, the main ring gear 4, the first braking shaft 5, the worm integrated device 6, the centralized control pressure hair tool 7, the driving unit 8, the worm unit 9, the multi-control disk gear 10, the pushing worm 11, the lubrication group 12, the adjusting part 13, the lapping group 14, the unit frame 15, the auxiliary shaft 16, the long shaft gear 17, the L-shaped oil supply pipe 18, the door blocking tube 19, the L-shaped moving pipe 20, the sponge body 21, the overflow tube 22, the neck shaft 23, the range extender gear 24, the range extender shaft 25, the seat frame 26, the tooth cylinder 27, the pressure supply gear 28, the hemisphere 29, the ring plate frame 30, the spring 31, the control cylinder 32, the energy conversion group 33, the central cylinder 34, the ring gear body 35, the small ring gear 36, the one-way bearing 37, the vertical shaft 38, the small worm 39, the beam position frame 40, the pressure holding elastic piece 41, the L-shaped moving body 42, the range extender frame 43, the strong pushing shaft 44, the U-shaped plate 45, the return elastic piece 46, the J-shaped elastic piece 47, the main fixed frame 48. Detailed implementation manners

[0045] 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 technical solutions in 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.

[0046] See also Figures 1 to 13 The present invention provides a technical solution: a welding positioner for welding a bearing retainer, comprising a positioner arm 1, a plurality of joints with a plurality of degrees of freedom are arranged on the positioner arm 1, and an intelligent worm device 2 is arranged at the joints with a plurality of degrees of freedom that adopt worm transmission, the intelligent worm device 2 comprises a first rotating drum 3 fixedly connected to a rotating small arm on the positioner arm 1, a main ring gear 4 fixed on the first rotating drum 3, a first brake shaft 5 driven by a motor installed on a fixed large arm on the positioner arm 1, and a worm integrated device 6 drivingly connected between the first brake shaft 5 and the main ring gear 4, the worm integrated device 6 comprises:

[0047] A centralized control and pressure release device 7, wherein the first brake shaft 5 passes through the middle of the centralized control and pressure release device 7;

[0048] A plurality of uniformly arranged driving units 8 are driven around the centralized control pressure generating device 7;

[0049] The worm unit 9 establishes a transmission between the driving unit 8 and the main ring gear 4, and the multiple worm units 9 arranged in the ring are self-lubricated in turn;

[0050] The multi-control disc gear 10 has a middle portion fixedly connected to the first brake shaft 5 , and the multi-control disc gear 10 transmits a plurality of worm units 9 arranged around it.

[0051] refer to Figure 4 It is understood that the worm unit 9 includes:

[0052] A push worm 11 meshing with the main ring gear 4, an adjusting portion 13 for driving the push worm 11, and an overlap group 14 establishing transmission between the adjusting portion 13 and the multi-control disc gear 10;

[0053] A lubrication group 12 lubricates the meshing portion between the push worm 11 and the main ring gear 4.

[0054] refer to Figure 5 It is understood that the adjustment unit 13 includes:

[0055] The unit frame 15 includes a cross and a column rack fixed at one end of the cross, and the unit frame 15 supports and drives the pushing worm 11;

[0056] The secondary shaft 16 movably sleeved in the through hole opened on the cross of the unit frame 15 and the long shaft gear 17 coaxially fixed with the secondary shaft 16 push one end of the worm 11 to change direction transmission with the annular bevel gear fixed on the secondary shaft 16 through the fixed bevel gear.

[0057] refer to Figure 5 It is understood that the lubrication group 12 includes a worm-shaped sponge body 21, an overflow tube 22 passing through the axis of the sponge body 21, an L-shaped movable tube 20 with one end movably sleeved with the open end of the overflow tube 22, a gate blocking tube 19 with a sliding sleeve at the other end of the L-shaped movable tube 20, and an L-shaped oil supply pipe 18 fixedly connected to one side of the gate blocking tube 19. The end of the L-shaped movable tube 20 in the gate blocking tube 19 is blocked, and a gate hole is opened on the side shell of the L-shaped movable tube 20. The L-shaped movable tube 20 is moved to connect the gate hole and the L-shaped oil supply pipe 18. A guide hole is opened on the side shell of the overflow tube 22 to allow the lubricating oil inside the overflow tube 22 to seep out. The overflow tube 22 is partially movably sleeved in a through hole opened on the cross of the unit frame 15, and the secondary shaft 16 is used to change direction with the bevel gear fixed at the end of the overflow tube 22 through a fixed bevel gear. The sponge body 21 imitates the push worm 11 to rotate and displace synchronously.

[0058] refer to Figure 7 It is understood that the overlap group 14 includes a pressure gear 28 meshing with the multi-control disk gear 10, a gear cylinder 27 passing through the middle of the pressure gear 28, a seat frame 26 that limits and supports the gear cylinder 27, a neck shaft 23 and an extender shaft 25 also supported on the seat frame 26, and an extender gear 24 fixed at one end of the extender shaft 25, and the other end of the extender shaft 25 is connected to the bevel gear fixed on the neck shaft 23 through a fixed bevel gear for changing direction transmission, the column rack on the unit frame 15 slides through the square hole opened on the seat frame 26, and the extender gear 24 and the column rack are meshed and connected for transmission, the long shaft gear 17 slides through the gear hole opened at the axis of the gear cylinder 27, the L-shaped oil supply pipe 18 is fixed on the seat frame 26, and the neck shaft 23, the extender shaft 25 and the gear cylinder 27 are respectively movably sleeved in different through holes opened on the seat frame 26.

[0059] refer to Figure 8 It is understood that the centralized control pressure-generating device 7 includes a ring gear body 35 fixedly sleeved on the first brake shaft 5, a central cylinder 34 arranged on the outside of the first brake shaft 5, an energy conversion group 33 for establishing transmission between the ring gear body 35 and the central cylinder 34, a ring plate frame 30 for limiting and supporting the central cylinder 34, a control cylinder 32 clamped on the outside of the ring plate frame 30, a spring 31 connected between the central cylinder 34 and the control cylinder 32, and a plurality of hemispheres 29 evenly arranged and fixed on the bottom surface of the control cylinder 32.

[0060] The central cylinder 34 is movably sleeved in the circular hole opened in the middle of the ring plate frame 30. The control cylinder 32 includes a cylinder body and a convex arc backing plate fixed to the outside of the cylinder body. The outer edge of the ring plate frame 30 is clamped into the annular sliding groove opened on the inner side wall of the cylinder body of the control cylinder 32. The clockwork spring 31 is fixedly sleeved on the central cylinder 34, and the outer end of the clockwork spring 31 is fixed to the control cylinder 32.

[0061] The transducer group 33 includes a beam position frame 40 fixed to the ring plate frame 30, a vertical shaft 38 and a small worm 39 supported on the beam position frame 40, an L-shaped driving body 42 slidably passing through the square hole opened in the beam position frame 40, a holding pressure elastic piece 41 fixed to the beam position frame 40, a one-way bearing 37 fixedly sleeved at one end of the vertical shaft 38, and a small ring gear 36 fixedly sleeved outside the one-way bearing 37. One end of the L-shaped driving body 42 contacts the wavy surface arranged on the outer edge of the ring gear body 35 by arranging a convex block. One end of the holding pressure elastic piece 41 pushes against the L-shaped driving body 42. A row of teeth is arranged on the L-shaped driving body 42 to mesh and drive-connect with the small ring gear 36. The other end of the vertical shaft 38 is variably driven by a bevel gear fixed to the bevel gear fixed to one end of the small worm 39. The small worm 39 is meshed and driven-connected with the external gear ring arranged at one end of the central cylinder 34. The vertical shaft 38 and the small worm 39 are respectively movably sleeved in two through holes opened in the beam position frame 40.

[0062] The driving unit 8 includes a main fixed frame 48 fixedly connected to the seat frame 26, a J-shaped elastic piece 47 fixed to the main fixed frame 48, a strong push shaft 44 movably sleeved in the column hole opened in the main fixed frame 48, an extension frame 43 fixed to one end of the strong push shaft 44, a U-shaped plate 45 slidably passing through the plate hole opened in the main fixed frame 48, and a return elastic piece 46 with one end resting on the U-shaped plate 45. The other end of the return elastic piece 46 is fixed to the main fixed frame 48. The other end of the strong push shaft 44 is meshed and driven-connected with a row of teeth arranged on the U-shaped plate 45 through a fixed shaft gear. The U-shaped plate 45 contacts the outer side wall of the control cylinder 32. The J-shaped elastic piece 47 intercepts the hemispherical body 29 moving in a circular motion. One end of the extension frame 43 is meshed and driven-connected with the shaft gear arranged at one end of the neck shaft 23 through an arc-shaped rack.

[0063] The rotation of the first brake shaft 5 drives the multi-control disk gear 10, and then drives all the pressure-applying gears 28. Subsequently, it drives the long shaft gear 17 through the tooth cylinder 27. Next, it drives the push pressure worm 11 and the overflow pipe cylinder 22 through the auxiliary shaft 16. The overflow pipe cylinder 22 drives the sponge body 21 to rotate. In this way, the sponge body 21 rotates imitating the push pressure worm 11. The multiple push pressure worms 11 arranged in a ring rotate synchronously to drive the main ring gear 4 to rotate. The sponge body 21 rotates imitating the push pressure worm 11 so that it can mesh with the main ring gear 4 smoothly after moving. The main ring gear 4 drives the first rotating cylinder 3 to rotate, and then drives the small arm on the displacement robotic arm 1 to rotate.

[0064] The contact parts between the push worm 11 and the main ring gear 4 need to be lubricated in time to reduce the sense of frustration caused by dry friction. Multiple contact parts are arranged on the main ring gear 4, and the multiple parts are automatically lubricated in turn. Because the push worm 11 needs to be disengaged from the driving contact part during lubrication, the remaining push worm 11 can continue to drive the main ring gear 4. In this way, lubrication will not affect the real-time driving work of the push worm 11 on the main ring gear 4.

[0065] The principle of lubrication of a single driving part on the main ring gear 4 is as follows: the first brake shaft 5 drives the ring gear body 35 to rotate, and the rotating ring gear body 35 continuously moves the L-shaped feeding body 42. The L-shaped feeding body 42 drives the small ring gear 36 to rotate back and forth during the reciprocating motion, and is converted by the one-way bearing 37. The vertical shaft 38 rotates intermittently in a directional manner, and then the small worm 39 rotates to drive the central cylinder 34. The rotation of the central cylinder 34 causes the mainspring 31 to contract and accumulate force. At this time, the J-shaped spring 47 intercepts a hemisphere 29 correspondingly, thereby limiting the rotation of the control cylinder 32. When the central cylinder 34 accumulates enough force, the hemisphere 29 breaks through the interception of the J-shaped spring 47, and then the control cylinder 32 rotates rapidly. At this time, regardless of whether the first brake shaft 5 and the ring gear body 35 at the source rotate, the control cylinder 32 will automatically complete a unit stage of rotation, that is, Figure 13 After a hemisphere 29 breaks through the J-shaped shrapnel 47 and is then intercepted by the next J-shaped shrapnel 47, refer to Figure 12 In a unit stage process, the convex arc pad on the rotating control cylinder 32 will lift the U-shaped plate 45. At the end of the unit stage, the control cylinder 32 and the U-shaped plate 45 are separated. The U-shaped plate 45 is lifted up, which is the lubrication stage. Specifically, the moving U-shaped plate 45 drives the strong push shaft 44 to rotate, and then the range extension frame 43 swings to drive the neck shaft 23 to rotate. Next, the range extension shaft 25 drives the range extension gear 24 to rotate, causing Figure 5 The unit frame 15 in the middle rises. During the rising process, the long shaft gear 17 and the gear cylinder 27 are always meshed. The unit frame 15 drives the push worm 11 and the overflow tube 22 to rise synchronously. The sponge 21 outside the overflow tube 22 rises and replaces the push worm 11. The sponge 21 contacts the main ring gear 4. The sponge 21 continuously oozes lubricating oil to the outside, and the lubricating oil is applied to a part of the main ring gear 4. In this way, when the convex arc pad of the control tube 32 no longer supports the U-shaped plate 45, the reset unit frame 15 falls back, and then the push worm 11 falls back to Figure 5 In the position shown, the contact portion between the push worm 11 and the main ring gear 4 has been smeared with lubricating oil, thereby achieving automatic lubrication.

[0066] refer to Figure 5, the top end of the L-shaped oil supply pipe 18 is externally connected to the lubricating oil supply mechanism in the prior art. After the L-shaped moving pipe 20, the sponge body 21, and the overflow pipe cylinder 22 rise synchronously, the aperture on the L-shaped moving pipe 20 is docked and communicated with the L-shaped oil supply pipe 18. In this way, the lubricating oil is injected into the overflow pipe cylinder 22 through the L-shaped moving pipe 20, and then seeps into the sponge body 21 through the diversion holes on the overflow pipe cylinder 22. In this way, the sponge body 21 is attached with lubricating oil. After the sponge body 21 rises, it replaces the pushing worm 11. The rotating sponge body 21 can apply the lubricating oil to the main ring gear 4. After the pushing worm 11 and the sponge body 21 fall synchronously, the aperture on the L-shaped moving pipe 20 is no longer communicated with the L-shaped oil supply pipe 18, and in this way, the lubricating oil stops being transported.

[0067] The main body drive path structure between the boom and the forearm includes the first brake shaft 5, the multi-control disk gear 10, the pressure gear 28, the toothed cylinder 27, the long shaft gear 17, the secondary shaft 16, and the pushing worm 11. Only the transmission from the pushing worm 11 to the main ring gear 4 is worm supercharging transmission, and the remaining transmission nodes are composed of gears or bevel gears. Worm transmission requires more lubrication than gear transmission. Due to the large sliding friction in worm transmission, a large amount of heat is easily generated, leading to increased tooth surface wear. Therefore, better lubrication conditions are required to reduce friction loss and wear. The working principle of worm transmission is based on the meshing of a worm and a gear. A worm is a spiral-shaped shaft, whose shape is similar to a thread. A worm wheel is a gear that meshes with the worm. When the worm rotates, the worm wheel rotates accordingly to achieve power transmission. Due to the spiral shape of the worm, an inclined plane frictional contact is formed between the teeth of the worm wheel and the spiral groove of the worm, generating relative movement, thereby achieving the transmission effect. This friction will cause higher heat generation and wear. In contrast, although there is also friction in the transmission of gears and bevel gears, their meshing clearance is small and the friction loss is small. Therefore, the lubrication requirement is relatively low. Therefore, the present invention improves the smooth transmission at the joints of the welding positioner by solving the problem of worm lubrication, while the lubrication requirements for the transmission of gears and bevel gears are relatively low and can be relatively ignored, and the lubrication of other structures or nodes for lifting the driving unit frame 15 does not need to be considered. Even if the unit frame 15 has a sense of jerky movement, which may cause a delay in the lubrication timing, it does not affect the driving of the main ring gear 4 by the pushing worm 11.

[0068] A welding process for bearing welding and processing includes the following steps:

[0069] Step 1: The cage prepared by stamping, truncating, and curling the steel strip is sleeved outside the bearing inner ring, and then the bearing inner ring and cage assembly are fixed on the metal bed;

[0070] Step 2: The metal bed is externally connected with circuit wires to check the circuit safety and the positioning accuracy of the cage;

[0071] Step 3: The welding positioner preheats and deforms itself, eliminates the sense of jerk through self-lubrication at the mechanical arm joints, and then drives the arc welding gun to move;

[0072] Step 4: The arc-emitting part of the arc welding gun is close to the end of the cage, and then the arc welding gun is powered on. The high-temperature arc generated between the arc welding gun and the metal bed acts on the cage joint to achieve welding.

[0073] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding positioner for welding a bearing retainer, comprising a positioner arm, characterized in that: The position-shifting mechanical arm is provided with a plurality of joints of degrees of freedom, and an intelligent worm device is provided at the joints of degrees of freedom using worm drive, and the intelligent worm device comprises a first rotating drum fixedly connected to a rotating small arm on the position-shifting mechanical arm, a main ring gear fixed on the first rotating drum, a first brake shaft driven by a motor installed on the fixed large arm of the position-shifting mechanical arm, and a worm integrated device drivingly connected between the first brake shaft and the main ring gear, and the worm integrated device comprises: Centralized control pressure release device, the first brake shaft passes through the middle of the centralized control pressure release device; The centralized control pressure generator is surrounded by multiple uniformly arranged driving units; The worm unit tool establishes transmission between the driving unit and the main ring gear, and multiple worm units arranged in the ring are self-lubricated in turn; A multi-control disc gear, a middle portion of the multi-control disc gear is fixedly connected to the first brake shaft, and the multi-control disc gear transmits a plurality of worm units arranged around it.

2. A welding positioner for welding a bearing retainer according to claim 1, characterized in that: The worm unit comprises: A push worm meshing with the main ring gear, an adjustment portion for driving the push worm, and a lap joint group establishing transmission between the adjustment portion and the multi-control plate gear; A lubrication group that lubricates the meshing area between the push worm and the main ring gear.

3. A welding positioner for welding a bearing retainer according to claim 2, characterized in that: The adjustment unit includes: The unit frame includes a cross and a column rack fixed at one end of the cross, and the unit frame supports and drives the push worm; The secondary shaft is movably sleeved in the through hole opened on the unit frame cross, and the long shaft gear is coaxially fixed with the secondary shaft. One end of the push worm is transmitted in a direction-changing manner with the annular bevel gear fixed on the secondary shaft through the fixed bevel gear.

4. A welding positioner for welding a bearing retainer according to claim 3, characterized in that: The lubrication group includes a worm-shaped sponge, an overflow tube penetrating at the axis of the sponge, an L-shaped moving tube movably sleeved with the open end of the overflow tube at one end, a blocking tube with a sliding sleeve at the other end of the L-shaped moving tube, and an L-shaped oil supply pipe fixedly connected to one side of the blocking tube. The end of the L-shaped moving tube in the blocking tube is blocked, and a door hole is opened on the L-shaped moving tube side shell. The L-shaped moving tube is moved to connect the door hole and the L-shaped oil supply pipe. A guide hole is opened on the overflow tube side shell to allow the lubricating oil inside the overflow tube to seep out. The overflow tube is partially movably sleeved in a through hole opened on the unit frame cross, and the secondary shaft is connected to the bevel gear fixed at the end of the overflow tube by a fixed bevel gear. The sponge imitates the synchronous rotation and displacement of the push worm.

5. The welding positioner process for welding a bearing retainer according to claim 4, characterized in that: The overlap group includes a pressure gear meshed with the multi-control disk gear, a gear cylinder passing through the middle of the pressure gear, a seat frame that supports the gear cylinder in a limited position, a neck shaft and an extender shaft supported on the seat frame, and an extender gear fixed at one end of the extender shaft, and the other end of the extender shaft changes direction with the bevel gear fixed on the neck shaft through a fixed bevel gear, the column rack on the unit frame slides through a square hole opened on the seat frame, and the extender gear and the column rack are meshed and connected, the long shaft gear slides through the gear hole opened at the axis of the gear cylinder, and the L-shaped oil supply pipe is fixed on the seat frame.

6. A welding positioner for welding a bearing retainer according to claim 5, characterized in that: The centralized control pressure-generating device includes a ring gear body fixedly sleeved on the first brake shaft, a central cylinder arranged outside the first brake shaft, an energy conversion group for establishing transmission between the ring gear body and the central cylinder, a ring plate frame for limiting and supporting the central cylinder, a control cylinder arranged and clamped outside the ring plate frame, a mainspring connected between the central cylinder and the control cylinder, and a plurality of hemispheres evenly arranged and fixed on the bottom surface of the control cylinder.

7. A welding positioner for welding a bearing retainer according to claim 6, characterized in that: The central tube is movably sleeved in a circular hole opened in the middle of the ring plate frame, the control tube includes a tube body and a convex arc pad fixed outside the tube body, the outer edge of the ring plate frame is inserted into an annular groove opened on the inner wall of the control tube body, the mainspring is fixedly sleeved on the central tube, and the outer end of the mainspring is fixed on the control tube.

8. The welding positioner for welding a bearing retainer according to claim 6, characterized in that: The energy conversion group includes a beam frame fixed on the ring plate frame, a vertical shaft and a small worm supported on the beam frame, an L-shaped actuator sliding through a square hole opened on the beam frame, a pressure-holding spring fixed on the beam frame, a one-way bearing with a fixed sleeve at one end of the vertical shaft, and a small ring gear of a fixed sleeve outside the one-way bearing.

9. A welding positioner for welding a bearing retainer according to claim 8, characterized in that: One end of the L-shaped driving body is in contact with the wave surface set on the outer edge of the ring gear by setting a convex block, and one end of the pressure-holding spring pushes the L-shaped driving body. A row of teeth is set on the L-shaped driving body to mesh with the small ring gear for transmission connection, and the other end of the vertical shaft is connected to the bevel gear fixed at one end of the small worm gear for direction change transmission through a fixed bevel gear, and the small worm gear is meshed with the outer gear ring set at one end of the central cylinder for transmission connection.

10. The welding positioner for welding a bearing retainer according to claim 6, characterized in that: The traction unit includes a main fixed frame fixedly connected to the seat frame, a J-shaped spring fixed on the main fixed frame, a strong push shaft movably sleeved in a column hole opened on the main fixed frame, an extended-range frame with one end of the strong push shaft fixed, a U-shaped plate sliding through a plate hole opened on the main fixed frame, and a return spring with one end resting on the U-shaped plate.

11. A welding positioner for welding a bearing retainer according to claim 10, characterized in that: The other end of the return spring is fixed on the main fixed frame, and the other end of the forced thrust shaft is connected to a row of teeth arranged on the U-shaped plate through a fixed shaft gear. The U-shaped plate contacts the outer wall of the control cylinder, and the J-shaped spring intercepts the orbiting hemisphere. One end of the range extender frame is connected to the shaft gear arranged at one end of the neck shaft through an arc-shaped rack.

12. A welding process for bearing welding, using the welding positioner for bearing retainer welding according to claim 1, characterized in that: The following steps are involved: Step 1: The cage prepared by stamping, cutting and rolling the steel strip is clamped on the outside of the bearing inner ring, and then the bearing inner ring and cage assembly are fixed on the metal bed; Step 2: Connect the external loop wires on the metal bed and check the circuit safety and the positioning accuracy of the cage; Step 3: The welding positioner preheats and deforms itself, and eliminates the sense of frustration through self-lubrication of the mechanical arm joints, and then drives the arc welding gun to move; Step 4: The arc emitting part of the arc welding gun is close to the end of the cage, and then the arc welding gun is energized. The high-temperature arc generated between the arc welding gun and the metal bed acts on the joint of the cage to achieve welding.

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