A milling machine for automatic gap finding in sliding bearings

Abstract

A milling machine for automatically locating the joint of sliding bearings includes a rotating loading and unloading module, a joint alignment unit, a loading and transporting unit, and a milling unit. The joint alignment unit includes a joint transport mechanism, a joint finding mechanism, and joint clamping jaws. The joint finding mechanism includes a joint finding worktable, a first positioning fixture, a movable cylinder, and a second positioning fixture. The first positioning fixture includes a first positioning fixture body, a first positioning groove, a positioning through hole, a first sliding rod, a positioning pin, and a first buffer spring. Each second positioning fixture includes a second sliding rod, a second positioning fixture body, a second positioning groove, and a second buffer spring. After the first and second positioning fixtures stabilize the bearing, the joint transport mechanism drives the joint clamping jaws to rotate, causing the bearing on the joint clamping jaws to rotate synchronously, so that the positioning pin engages the open joint of the bearing, thus achieving the positioning of the bearing joint.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing manufacturing equipment, and in particular, it is a milling machine for automatically finding gaps in sliding bearings. Background Technology

[0002] Bearings are an indispensable component for rotating shafts, with huge market demand and stringent quality requirements. To effectively improve production efficiency and reduce manufacturing costs, automated machining has become an inevitable choice for the industry. Therefore, solving the technical challenges of automated milling of bearings represents a technological advancement with profound significance.

[0003] In the bearing manufacturing process, rolling and forming create an opening gap. To meet the needs of lubrication, sealing, and assembly positioning, a high-precision oil groove with a good surface quality must be machined along this gap. Traditionally, the operator holds the bearing and uses a simple fixture on a standard benchtop milling machine to manually set the tool, locate the gap, and manually feed the milling operation. Because the width, position, and shape of the opening gap vary from batch to batch due to springback during rolling, manual tool setting is time-consuming. Workers frequently bend over and lift workpieces, resulting in high labor intensity and fatigue. This leads to poor consistency in groove depth and width, and a high rate of defects such as burrs and tool marks, affecting product quality. Summary of the Invention

[0004] In view of this, the present invention provides an improved milling machine for automatic gap finding in sliding bearings to meet industrial needs.

[0005] A milling groove machine for automatic groove finding in sliding bearings includes a rotary loading and unloading module for driving the bearing to be processed to rotate, a groove alignment unit disposed on one side of the rotary loading and unloading module, a loading and conveying unit disposed between the rotary loading and unloading module and the groove alignment unit, and at least one milling groove unit disposed on one side of the rotary loading and unloading module. The groove alignment unit includes a groove alignment conveying mechanism disposed on one side of the rotary loading and unloading module, a groove finding mechanism disposed on one side of the groove alignment conveying mechanism, and a groove finding clamping jaw disposed on the groove alignment conveying mechanism. The groove finding mechanism includes a groove finding worktable, at least one first positioning fixture disposed on the groove finding worktable, at least one movable cylinder disposed on the groove finding worktable, and at least one second positioning fixture disposed on the movable cylinder. The first positioning fixture includes a first positioning fixture body disposed on the seam-finding worktable, a first positioning groove disposed on one side of the first positioning fixture body, a positioning through hole disposed on the first positioning fixture body and communicating with the first positioning groove, a first sliding rod slidably connected to the seam-finding worktable, a positioning pin disposed on the first sliding rod and inserted into the positioning through hole, and a first buffer spring sleeved on the first sliding rod and disposed between the positioning pin and the seam-finding worktable. The movable cylinder includes a movable cylinder body disposed on the seam-finding worktable and a mounting bracket disposed on the movable cylinder body. Each second positioning fixture includes at least one second sliding rod disposed on the mounting bracket, a second positioning fixture body disposed at one end of the second sliding rod, a second positioning groove disposed on one side of the second positioning fixture body, and a second buffer spring sleeved on the second sliding rod and clamped between the mounting bracket and the second positioning fixture body. Once the first and second positioning clamps stabilize the bearing, the seam transport mechanism drives the seam clamping claws to rotate, and the bearing on the seam clamping claws also rotates synchronously, causing the positioning pin to lock the open seam of the bearing, thereby achieving the positioning of the bearing seam.

[0006] Furthermore, the rotary loading and unloading module includes a rotary drive motor, a turntable mounted on the rotary drive motor, and multiple fixtures mounted on the turntable for accommodating the bearings to be processed. Each pair of fixtures forms a group, and the included angle between any two adjacent groups of fixtures is 90 degrees.

[0007] Furthermore, each of the fixtures includes a fixture base, a clamping groove disposed on the fixture base for accommodating the bearing, a fixture cylinder disposed on one side of the fixture base, and an arc-shaped clamping member disposed on the fixture cylinder and accommodated in the clamping groove.

[0008] Furthermore, the thickness of the second positioning fixture body is less than the thickness of the first positioning fixture body.

[0009] Furthermore, the feeding and transporting unit includes a feeding and transporting mechanism and a feeding gripper disposed on the feeding and transporting mechanism.

[0010] Furthermore, the seam conveying mechanism has the same structure as the feeding conveying mechanism. Both the seam conveying mechanism and the feeding conveying mechanism include a seam conveying device, a seam lifting device disposed on the seam conveying device, a first mounting platform disposed on the seam conveying device, and at least one seam rotating device disposed on the seam conveying device.

[0011] Furthermore, the seam-aligning rotating device includes a drive motor mounted on the first mounting platform and a rotary joint mounted on the drive motor.

[0012] Furthermore, the seam-aligning rotating device includes a drive motor mounted on the first mounting platform and a rotary joint mounted on the drive motor.

[0013] Furthermore, the milling transport device includes a lateral moving device, a vertical moving device disposed on the lateral moving device, a milling lifting device disposed on the vertical moving device, and a second mounting platform disposed on the milling lifting device.

[0014] Compared with the prior art, the milling groove machine for automatic seam finding of sliding bearings provided by this utility model positions the butt joint of the bearing through the seam-fitting unit, and the feeding and conveying unit transfers the bearing with the seam-fitted seam completed by the seam-fitting unit to the milling groove unit. The seam-fitting transport mechanism in the seam-fitting unit drives the seam-fitting clamping claw to move and rotate, thereby moving the bearing onto the seam-fitting unit. The seam-finding mechanism includes a seam-finding worktable, at least one first positioning fixture disposed on the seam-finding worktable, at least one movable cylinder disposed on the seam-finding worktable, and at least one second positioning fixture disposed on the movable cylinder. Each first positioning fixture corresponds to one second positioning fixture, and the movable cylinder drives the second positioning fixture to move, adjusting the gap between the first positioning fixture and the second positioning fixture. In the first positioning fixture, the first sliding rod is slidably connected to the seam-finding worktable, and the first sliding rod restricts the position of the seam-finding worktable. A positioning pin is disposed at one end of the first sliding rod and inserted into the positioning through hole. A first buffer spring is disposed between the positioning pin and the seam-finding worktable, and the first buffer spring supports the positioning pin within the first positioning groove through its own elasticity. In the second positioning fixture, the second sliding rod is slidably connected to the mounting bracket of the movable cylinder, and restricts the sliding position of the second sliding rod on the mounting bracket. The body of the second positioning fixture is connected to the second sliding rod, and the body of the second positioning fixture can slide along the second sliding rod. A second buffer spring is disposed between the mounting bracket and the body of the second positioning fixture, and the second buffer spring is used to buffer the impact received by the body of the second positioning fixture. During the seam alignment process, when the seam alignment transport mechanism transfers the bearing to the seam-finding mechanism via the seam alignment clamping claws, the bearing is placed between the first positioning clamp and the second positioning clamp. The movable cylinder drives the second positioning clamp to move closer to the first positioning clamp. After the first and second positioning clamps have stabilized the bearing, the seam alignment transport mechanism drives the seam alignment clamping claws to rotate, and the bearing on the seam alignment clamping claws also rotates synchronously, causing the positioning pin to lock the open seam of the bearing, thus achieving the positioning of the bearing seam. After the bearing is positioned, the movable cylinder drives the second positioning clamp to separate from the first positioning clamp. It can be seen that this milling groove machine for automatic seam finding of sliding bearings achieves automatic bearing seam alignment, reducing the workload and labor intensity of workers. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the oil groove milling machine for automatic gap finding of sliding bearings provided by this utility model.

[0016] Figure 2for Figure 1 A schematic diagram of the rotating loading and unloading module in an oil groove milling machine used for automatic gap finding of sliding bearings.

[0017] Figure 3 for Figure 1 A schematic diagram of the material conveying unit in a milling machine for automatic gap finding of sliding bearings.

[0018] Figure 4 for Figure 1 A schematic diagram of the joint-finding mechanism in an oil groove milling machine used for automatic joint finding of sliding bearings.

[0019] Figure 5 for Figure 1 A schematic diagram of the milling unit in an oil groove milling machine used for automatic groove finding of sliding bearings. Detailed Implementation

[0020] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0021] like Figures 1 to 5 The diagram shows a structural schematic of the milling oil groove machine for automatic gap finding of sliding bearings provided by this utility model. The milling oil groove machine for automatic gap finding of sliding bearings includes a rotary loading and unloading module 10 for driving the bearing to be processed to rotate, a gap-aligning unit 20 disposed on one side of the rotary loading and unloading module 10, a loading and transporting unit 30 disposed between the rotary loading and unloading module 10 and the gap-aligning unit 20, and at least one milling unit 40 disposed on one side of the rotary loading and unloading module 10. The milling oil groove machine for automatic gap finding of sliding bearings also includes other functional modules, such as assembly components, electrical connection components, etc., which should be known to those skilled in the art and will not be described in detail here.

[0022] The rotary loading and unloading module 10 includes a rotary drive motor 11, a turntable 12 mounted on the rotary drive motor 11, and a plurality of fixtures 13 mounted on the turntable 12 for accommodating the bearings to be processed.

[0023] The turntable 12 is mounted on the rotary drive motor 11. The rotary drive motor 11 drives the turntable 12 to rotate, thereby rotating the clamps 13 on the turntable 12 to the side of the loading and conveying unit 30 and the milling unit 40, so as to realize the loading of bearings in the rotary loading and unloading module 10, and the milling unit 40 mills the bearings. The turntable 12 is fixed on the drive bearing of the rotary drive motor 11. The connection structure between the turntable 12 and the rotary drive motor 11 is a prior art. In this embodiment, every two clamps 13 form a group, and the included angle between any two adjacent groups of clamps 13 is 90 degrees. The connection structure of the rotary drive motor 11 driving the turntable 12 is a prior art and will not be described in detail here.

[0024] Each of the clamps 13 includes a clamp seat 131, a clamping groove 132 disposed on the clamp seat 131 for accommodating the bearing, a clamp cylinder 133 disposed on one side of the clamp seat 131, and an arc-shaped clamping member 134 disposed on the clamp cylinder 133 and accommodated in the clamping groove 132.

[0025] The clamp cylinder 133 drives the arc-shaped clamping member 134 to move within the clamping groove 132, adjusting the size of the clamping groove 132 to achieve stable position of the bearing within the clamping groove 132.

[0026] In this embodiment, each pair of fixtures 13 forms a group, and the included angle between any two adjacent groups of fixtures 13 is 90 degrees. Thus, the rotary drive motor 11 drives the turntable 12 to rotate 90 degrees each time, that is, a group of fixtures 13 changes the processing station.

[0027] The seam-fitting unit 20 includes a seam-fitting transport mechanism 21 disposed on one side of the rotating loading and unloading module 10, a seam-finding mechanism 22 disposed on one side of the seam-fitting transport mechanism 21, and a seam-fitting clamping claw 23 disposed on the seam-fitting transport mechanism 21.

[0028] The seam-aligning transport mechanism 21 is used to attach the bearing to the seam-finding mechanism 22 and drive the bearing to move. The seam-aligning transport mechanism 21 has the same structure as the feeding transport unit 30. The seam-aligning transport mechanism 21 will be described in detail in conjunction with the feeding transport unit 30.

[0029] The seam-finding mechanism 22 includes a seam-finding worktable 221, at least one first positioning clamp 222 disposed on the seam-finding worktable 221, at least one movable cylinder 223 disposed on the seam-finding worktable 221, and at least one second positioning clamp 224 disposed on the movable cylinder 223.

[0030] The joint-finding worktable 221 is used to set the first positioning fixture 222, the movable cylinder 223, and the second positioning fixture 224, and is used to place the bearing to be processed on the joint-finding worktable 221. The bearing is set between the first positioning fixture 222 and the second positioning fixture 224, and the joint of the bearing is positioned by the first positioning fixture 222 and the second positioning fixture 224.

[0031] The first positioning fixture 222 includes a first positioning fixture body 2221 disposed on the seam-finding worktable 221, a first positioning groove 2222 disposed on one side of the first positioning fixture body 2221, a positioning through hole 2223 disposed on the first positioning fixture body 2221 and communicating with the first positioning groove 2222, a first sliding rod 2224 slidably connected to the seam-finding worktable 221, a positioning pin 2225 disposed on the first sliding rod 2224 and inserted into the positioning through hole, and a first buffer spring 2226 sleeved on the first sliding rod 2224 and disposed between the positioning pin 2225 and the seam-finding worktable 221.

[0032] The first sliding rod 2224 is slidably connected to the seam-finding worktable 221, and the first sliding rod 2224 restricts the position of the seam-finding worktable 221. The sliding connection structure between the first sliding rod 2224 and the seam-finding worktable 221 is a prior art and will not be described in detail here.

[0033] The positioning pin 2225 is disposed at one end of the first sliding rod 2224. The positioning pin 2225 is inserted into the positioning through hole 2223. The first buffer spring 2226 is disposed between the positioning pin 2225 and the seam finding worktable 221. The first buffer spring 2226 supports the positioning pin 2225 by its own elasticity and is housed in the first positioning groove 2222.

[0034] When the seam transport mechanism 21 transports the seam finding mechanism 22, the positioning pin 2225 protrudes from the first positioning groove 2222 so that one end of the positioning pin 2225 abuts against the bearing. Under the pressure of the first buffer spring 2226, one end of the positioning pin 2225 always abuts against the bearing surface, thereby securing the opening seam of the bearing.

[0035] The movable cylinder 223 includes a movable cylinder body 2231 disposed on the joint-finding workbench 221 and a mounting bracket 2232 disposed on the movable cylinder body 2231.

[0036] Each of the second positioning clamps 224 includes at least one second sliding rod 2241 disposed on the mounting frame 2232, a second positioning clamp body 2242 disposed at one end of the second sliding rod 2241, a second positioning groove 2243 disposed on one side of the second positioning clamp body 2242, and a second buffer spring 2244 sleeved on the second sliding rod 2241 and clamped between the mounting frame 2232 and the second positioning clamp body 2242.

[0037] The second sliding rod 2241 is slidably connected to the mounting bracket 2232 and restricts the sliding position of the second sliding rod 2241 on the mounting bracket 2232. The connection structure between the second sliding rod 2241 and the mounting bracket 2232 is a prior art and will not be described in detail here.

[0038] The second positioning clamp body 2242 is connected to the second sliding rod 2241. The second positioning clamp body 2242 can slide along the second sliding rod 2241. The second buffer spring 2244 is disposed between the mounting bracket 2232 and the second positioning clamp body 2242, and the second buffer spring 2244 is used to buffer the impact received by the second positioning clamp body 2242. In addition, the thickness of the second positioning clamp body 2242 is less than the thickness of the first positioning clamp body 2221, so that a height difference is formed between the thickness of the second positioning clamp body 2242 and the first positioning clamp body 2221, so that the seam conveying mechanism 21 can place the bearing between the second positioning clamp body 2242 and the first positioning clamp body 2221, and the loading conveying unit 30 can remove the bearing between the second positioning clamp body 2242 and the first positioning clamp body 2221.

[0039] When the seam transport mechanism 21 transfers the bearing to the seam finding mechanism 22 via the seam clamping claw 23, the bearing is placed between the first positioning clamp 222 and the second positioning clamp 224. The movable cylinder 223 drives the second positioning clamp 224 to move closer to the first positioning clamp 222. After the first positioning clamp 222 and the second positioning clamp 224 hold the bearing stably, the seam transport mechanism 21 drives the seam clamping claw 23 to rotate, and the bearing on the seam clamping claw 23 also rotates synchronously, so that the positioning pin 2225 locks the open seam of the bearing, thereby achieving the positioning of the bearing seam. After the bearing is positioned, the movable cylinder 223 drives the second positioning clamp 224 to separate from the first positioning clamp 222.

[0040] The loading and transport unit 30 includes a loading and transport mechanism 31 and a loading gripper 32 disposed on the loading and transport mechanism 31.

[0041] The seam conveying mechanism 21 and the feeding conveying mechanism 31 have the same structure. Both the seam conveying mechanism 21 and the feeding conveying mechanism 31 include a seam conveying device 211, a seam lifting device 212 disposed on the seam conveying device 211, a first mounting platform 213 disposed on the seam conveying device 211, and at least one seam rotating device 214 disposed on the seam conveying device 211.

[0042] Both the seam conveying device 211 and the seam lifting device 212 are screw sliding mechanisms, which are mechanical transmission devices that convert rotary motion into linear motion. The seam conveying device 211 drives the seam lifting device 212 to move horizontally, and the seam lifting device 212 drives the lifting of the feeding gripper 32 and the seam clamping gripper 215. The first mounting platform 213 is mounted on the seam conveying device 211. The seam lifting device 212 drives the first mounting platform 213 to rise and fall, thereby adjusting the position of the seam rotating device 214 and the seam clamping claw 23. The connection structure between the first mounting platform 213 and the seam lifting device 212 is a prior art.

[0043] The seam-aligning rotating device 214 includes a drive motor 2141 mounted on the first mounting platform 213 and a rotary joint 2142 mounted on the drive motor 2141. The rotary joint 2142 connects the seam-aligning clamping claw 23 to the drive motor 2141. The drive motor 2141 drives the seam-aligning clamping claw 23 to rotate. The connection structure between the rotary joint 2142 and the drive motor 2141 is prior art and will not be described in detail here.

[0044] The seam clamping claw 23 and the loading claw 32 are both pneumatic claws. Pneumatic claws are actuators that use compressed air as power to clamp or grip workpieces. The seam clamping claw 23 and the loading claw 32 are existing technologies and will not be described in detail here.

[0045] During transportation, the seam transport mechanism 21, including the seam transport device 211 and the seam lifting device 212, drives the seam rotating device 214 and the seam clamping claw 215 to move, thereby driving the seam clamping claw 215 to clamp the bearing and transfer it to the seam finding mechanism 22. The seam rotating device 214 also drives the seam clamping claw 23 to rotate, thereby positioning the bearing at the seam on the seam finding mechanism 22.

[0046] During the transportation process, the seam-aligning transport device 211 and the seam-aligning lifting device 212 drive the seam-aligning rotating device 214 and the seam-aligning clamping claw 215 to move, aligning the loading claw 32 with the bearing that has completed seam alignment on the seam-finding mechanism 22. The loading transport mechanism 31 drives the loading claw 32 to clamp the bearing and transfer it to the fixture 13 on the rotating loading and unloading module 10. If there is a groove angle requirement in the bearing processing, the bearing angle can be adjusted by rotating the seam-aligning rotating device 214 to drive the seam-aligning clamping claw 23.

[0047] The milling unit 40 includes a milling transport device 41 and at least one milling machine 42 mounted on the milling transport device 41.

[0048] The milling transport device 41 includes a lateral moving device 411, a vertical moving device 412 disposed on the lateral moving device 411, a milling lifting device 413 disposed on the vertical moving device 412, and a second mounting platform 414 disposed on the milling lifting device 413.

[0049] The horizontal moving device 411 drives the vertical moving device 412 to move horizontally, the vertical moving device 412 drives the milling lifting device 413 to move vertically, and the milling lifting device 413 drives the second mounting platform 414 to rise and fall, so that the milling machine 42 on the second mounting platform 414 can slide in all directions.

[0050] The lateral moving device 411, the vertical moving device 412, and the milling groove lifting device 413 are all lead screw sliding mechanisms. A lead screw sliding mechanism is a mechanical transmission device that converts rotary motion into linear motion. Its core is to achieve high-precision and reversible linear transmission through the helical cooperation between the lead screw and the slider. The lateral moving device 411, the vertical moving device 412, and the milling groove lifting device 413 are all existing technologies and will not be described in detail here.

[0051] The second mounting platform 414 is mounted on the milling lifting device 413, and the milling machine 42 is mounted on the second mounting platform 414. The milling lifting device 413 drives the milling machine 42 to rise and fall. The connection structure between the second mounting platform 414 and the milling lifting device 413 is a prior art.

[0052] The milling machine 42 is mainly used for secondary processing of automatic lathes. The milling machine 42 drives the milling cutter to mill grooves on the bearing. The milling machine 42 is a prior art and will not be described in detail here.

[0053] When the loading and transporting unit 30 transports the bearing to one side of the milling unit 40, the horizontal moving device 411, the vertical moving device 412, and the milling lifting device 413 in the milling transporting device 41 adjust the position and height of the milling machine 42. The milling transporting device 41 drives the milling machine 42 closer to the fixture 13 in the loading and transporting unit 30, and adjusts the position of the milling machine 42 in processing the bearing on the fixture 13, changing the height and depth of the milled groove on the bearing. The operating principle of the milling machine 42 in processing the bearing is existing technology and will not be described in detail here.

[0054] Compared with the prior art, the milling groove machine for automatic gap finding of sliding bearings provided by this utility model positions the butt joint of the bearing through the butt joint unit 20, and the feeding and conveying unit 30 transfers the bearing with the butt joint completed by the butt joint unit 20 to the milling groove unit 40. The butt joint conveying mechanism 21 in the butt joint unit 20 drives the butt joint clamping claw 23 to move and rotate, thereby moving the bearing onto the butt joint unit 20. The gap finding mechanism 22 includes a gap finding worktable 221, at least one first positioning clamp 222 disposed on the gap finding worktable 221, at least one movable cylinder 223 disposed on the gap finding worktable 221, and at least one second positioning clamp 224 disposed on the movable cylinder 223. Each first positioning clamp 222 corresponds to one second positioning clamp 224. The movable cylinder 223 drives the second positioning clamp 224 to move, adjusting the gap between the first positioning clamp 222 and the second positioning clamp 224. The first sliding rod 2224 in the first positioning fixture 222 is slidably connected to the seam-finding worktable 221, and the first sliding rod 2224 restricts the position of the seam-finding worktable 221. The positioning pin 2225 is disposed at one end of the first sliding rod 2224 and is inserted into the positioning through hole 2223. The first buffer spring 2226 is disposed between the positioning pin 2225 and the seam-finding worktable 221. The first buffer spring 2226 supports the positioning pin 2225 and accommodates it in the first positioning groove 2222 by its own elasticity. The second sliding rod 2241 in the second positioning fixture 224 is slidably connected to the mounting bracket 2232 of the movable cylinder 223, and restricts the sliding position of the second sliding rod 2241 in the mounting bracket 2232. The second positioning fixture body 2242 is connected to the second sliding rod 2241, and the second positioning fixture body 2242 can slide along the second sliding rod 2241. The second buffer spring 2244 is disposed between the mounting bracket 2232 and the second positioning fixture body 2242, and the second buffer spring 2244 is used to buffer the impact received by the second positioning fixture body 2242.During the seam alignment process, when the seam alignment transport mechanism 21 transfers the bearing to the seam-finding mechanism 22 via the seam alignment clamping claw 23, the bearing is placed between the first positioning clamp 222 and the second positioning clamp 224. The movable cylinder 223 drives the second positioning clamp 224 to move closer to the first positioning clamp 222. After the first positioning clamp 222 and the second positioning clamp 224 have stabilized the bearing, the seam alignment transport mechanism 21 drives the seam alignment clamping claw 23 to rotate, and the bearing on the seam alignment clamping claw 23 also rotates synchronously, causing the positioning pin 2225 to lock the open seam of the bearing, thus achieving the positioning of the bearing seam. After the bearing is positioned, the movable cylinder 223 drives the second positioning clamp 224 to separate from the first positioning clamp 222. It can be seen that this milling oil groove machine for automatic seam finding of sliding bearings achieves automatic bearing seam alignment, reducing the workload and labor intensity of workers.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A groove-milling machine for automatic gap finding of a sliding bearing, characterized in that: The milling groove machine for automatic gap finding of sliding bearings includes a rotary loading and unloading module for driving the bearing to be processed to rotate, a gap-fitting unit disposed on one side of the rotary loading and unloading module, a loading and conveying unit disposed between the rotary loading and unloading module and the gap-fitting unit, and at least one milling unit disposed on one side of the rotary loading and unloading module. The gap-fitting unit includes a gap-fitting conveying mechanism disposed on one side of the rotary loading and unloading module, a gap-finding mechanism disposed on one side of the gap-fitting conveying mechanism, and a gap-finding clamping jaw disposed on the gap-fitting conveying mechanism. The gap-finding mechanism includes a gap-finding worktable, at least one first positioning fixture disposed on the gap-finding worktable, at least one movable cylinder disposed on the gap-finding worktable, and at least one second positioning fixture disposed on the movable cylinder. The first positioning fixture includes a first positioning fixture body disposed on the gap-finding worktable, a first positioning groove disposed on one side of the first positioning fixture body, and a clamp disposed on the first positioning fixture body and communicating with the first positioning groove. The system includes a positioning through hole, a first sliding rod slidably connected to the seam-finding worktable, a positioning pin disposed on the first sliding rod and inserted into the positioning through hole, and a first buffer spring sleeved on the first sliding rod and disposed between the positioning pin and the seam-finding worktable. The movable cylinder includes a movable cylinder body disposed on the seam-finding worktable and a mounting bracket disposed on the movable cylinder body. Each second positioning fixture includes at least one second sliding rod disposed on the mounting bracket, a second positioning fixture body disposed at one end of the second sliding rod, a second positioning groove disposed on one side of the second positioning fixture body, and a second buffer spring sleeved on the second sliding rod and clamped between the mounting bracket and the second positioning fixture body. When the first positioning fixture and the second positioning fixture stabilize the bearing, the seam-aligning transport mechanism drives the seam-aligning clamping claw to rotate, and the bearing on the seam-aligning clamping claw also rotates synchronously, so that the positioning pin locks the open seam of the bearing, thereby achieving the positioning of the bearing seam.

2. The oil groove milling machine for automatic gap finding of a sliding bearing according to claim 1, characterized by: The rotary loading and unloading module includes a rotary drive motor, a turntable mounted on the rotary drive motor, and multiple fixtures mounted on the turntable for accommodating the bearings to be processed. Each pair of fixtures forms a group, and the included angle between any two adjacent groups of fixtures is 90 degrees.

3. The oil groove milling machine for automatic gap finding of a sliding bearing according to claim 2, characterized in that: Each of the fixtures includes a fixture base, a clamping groove disposed on the fixture base for accommodating the bearing, a fixture cylinder disposed on one side of the fixture base, and an arc-shaped clamping member disposed on the fixture cylinder and accommodated in the clamping groove.

4. The oil groove milling machine for automatic gap finding of a sliding bearing according to claim 1, characterized by: The thickness of the second positioning fixture body is less than the thickness of the first positioning fixture body.

5. The oil groove milling machine for automatic gap finding of sliding bearings according to claim 1, characterized in that: The feeding and transporting unit includes a feeding and transporting mechanism and a feeding gripper mounted on the feeding and transporting mechanism.

6. The milling machine for automatic gap finding of sliding bearings as described in claim 5, characterized in that: The seam conveying mechanism and the feeding conveying mechanism have the same structure. Both the seam conveying mechanism and the feeding conveying mechanism include a seam conveying device, a seam lifting device disposed on the seam conveying device, a first mounting platform disposed on the seam conveying device, and at least one seam rotating device disposed on the seam conveying device.

7. The milling machine for automatic gap finding of sliding bearings as described in claim 6, characterized in that: The seam-aligning rotating device includes a drive motor mounted on the first mounting platform and a rotary joint mounted on the drive motor.

8. The milling machine for automatic gap finding of sliding bearings as described in claim 1, characterized in that: Each of the milling units includes a milling transport device and at least one milling machine mounted on the milling transport device.

9. The milling machine for automatic gap finding of sliding bearings as described in claim 8, characterized in that: The milling transport device includes a lateral moving device, a vertical moving device disposed on the lateral moving device, a milling lifting device disposed on the vertical moving device, and a second mounting platform disposed on the milling lifting device.

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