A process for grinding an inner raceway of a bearing ring

Abstract

The application discloses a kind of bearing sleeve inner channel grinding process, control the relative position between motor adjustment sleeve and grinding wheel on cross-shaped sliding table, grinding wheel is driven by grinding motor to make high-speed rotary motion, grinding wheel is ground to sleeve inner channel grinding processing, sleeve is supported by radial support frame at installation station, and it is axially transported to rotary disc under the action of conveying cylinder, and is adapted to positioning member and the self mounting hole on sleeve, then is fixed by electromagnet, then grinding inner channel by grinding wheel under the action of grinding motor, to avoid the problem that chuck clamps fixed sleeve leaves clamp mark on outer diameter in the past.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of bearing grinding, and particularly relates to a grinding process for an inner raceway of a bearing ring. BACKGROUND

[0002] The core parts of a bearing are an outer ring and an inner ring, and the quality of the bearing is directly affected by the quality of the outer ring and the inner ring. The conventional machining process of the outer ring is as follows: grinding a ring plane, grinding an outer diameter, grinding an inner diameter, rough grinding a raceway, fine grinding the raceway, and raceway superfinishing grinding. When the raceway is ground, the outer ring is often clamped and fixed, and rotates at high speed under the driving action of a motor to cooperate with a grinding wheel for grinding treatment. However, the traditional clamping mostly adopts a chuck form, and the chuck will leave clamping marks on the outer diameter of the ring, affecting the performance of the bearing. In addition, the existing ring mostly adopts manual clamping, and the consistency of each clamping cannot be ensured, resulting in that the accuracy of the raceway does not meet the requirements. SUMMARY

[0003] In order to solve the above technical problems, the inventors have summarized and obtained the technical scheme of the application through practice. The application adopts the following technical scheme:

[0004] A grinding process for an inner raceway of a bearing ring, and the steps are as follows:

[0005] S100, ring feeding

[0006] The ring is fed to a radial support frame by a mechanical hand, the top of the radial support frame is in rolling cooperation with the ring, and a conveying cylinder is installed at the bottom of the radial support frame. The conveying cylinder drives the radial support frame to axially convey the ring to a mounting station;

[0007] S200, ring clamping

[0008] The mounting station is a cross-shaped sliding table, which is slidingly installed at the bottom of the radial support frame. A servo motor, a rotating shaft and a rotating disc are installed on the cross-shaped sliding table. The servo motor drives the rotating disc to rotate at high speed through the rotating shaft. A positioning piece is installed on the rotating disc to limit the circumferential movement of the ring. An electromagnet is also installed on the rotating disc to axially adsorb and fix the ring;

[0009] S300, inner raceway grinding

[0010] The relative position between the ring and the grinding wheel is adjusted by controlling the motor on the cross-shaped sliding table. The grinding wheel rotates at high speed under the driving action of a grinding motor, and the grinding wheel grinds and processes the inner raceway of the ring;

[0011] S400, ring discharging

[0012] After the grinding is completed, the electromagnet is powered off to release the ring, and the ring is completely supported by the radial support frame. The position of the ring is adjusted to the mounting station by the conveying cylinder;

[0013] S500, grinding wheel dressing

[0014] The grinding wheel dresser is arranged on the side of the grinding wheel opposite to the mounting station to perform fine dressing on the grinding wheel.

[0015] Preferably, the radial support frame is provided with a central radial frame, side roller frames symmetrically arranged on both sides, and an adjusting cylinder for driving the central radial frame to move, the side roller frames are rotationally arranged on the radial support frame, the central radial frame is slidingly arranged on the radial support frame, and the moving direction of the central radial frame is towards the direction of the ring axis, the two sides of the central radial frame are provided with inclined guide surfaces, the inclined guide surfaces are arranged at an angle of 45° in the moving direction of the central radial frame, the bottoms of the two side roller frames are attached to the inclined guide surfaces and are connected by springs, and the grinding point of the grinding wheel is located in the region between the tops of the two side roller frames.

[0016] Preferably, the mechanical hand comprises an X-axis linear module, a Y-axis linear module, a Z-axis linear module, and a clamping module.

[0017] The X-axis linear module is used to adjust the position of the clamping module along the X-axis.

[0018] The Y-axis linear module is used to adjust the position of the clamping module along the Y-axis.

[0019] The Z-axis linear module is used to adjust the position of the clamping module along the Z-axis.

[0020] The clamping module is used to automatically clamp / release the ring.

[0021] Preferably, the clamping module comprises a lifting frame, the side portions of the lifting frame are each provided with a guide hole inclined downward towards the middle portion, the guide hole forms an angle of 45° with the horizontal plane, a guide pin is arranged in the guide hole, the bottom of the guide pin is connected with a clamping block, the top end of the clamping block is slidingly arranged in the guide hole, the bottom end of the clamping block is provided with a compensation block on the side opposite to the middle portion of the lifting frame, the compensation block moves obliquely relative to the clamping block, the bottom end of the clamping block is provided with a compensation inclined surface inclined upward towards the middle portion on the side opposite to the lifting frame, the compensation inclined surface is provided with a guide groove and a circulating guide groove, the compensation block is provided with a guide block matched with the guide groove and a hooking rod member rotationally arranged thereon, the hooking rod member is a thin rod member and is provided with a hook head at the end portion, and the hook head reciprocally moves along the circulating guide groove.

[0022] Preferably, the circulating guide groove comprises an upward long groove, a downward short groove, an upward short groove, and a downward long groove, and the depth of the inlet of each groove is smaller than the depth of the outlet.

[0023] The upward long groove and the downward long groove are symmetrically arranged, and the downward short groove and the upward short groove are symmetrically arranged.

[0024] The inlet of the upgoing long groove and the outlet of the downgoing long groove meet, the outlet of the upgoing long groove and the inlet of the downgoing short groove meet, the outlet of the downgoing short groove and the inlet of the upgoing short groove meet, and the outlet of the upgoing short groove and the inlet of the downgoing long groove meet;

[0025] The height of the meeting point of the outlet of the downgoing short groove and the inlet of the upgoing short groove is lower than the height of the meeting point of the outlet of the upgoing long groove and the inlet of the downgoing short groove;

[0026] The height of the meeting point of the outlet of the upgoing long groove and the inlet of the downgoing short groove is flush with the height of the meeting point of the outlet of the upgoing short groove and the inlet of the downgoing long groove.

[0027] Preferably, when the sleeve ring needs to be gripped by the mechanical hand:

[0028] The X-axis linear module and the Y-axis linear module adjust the position of the lifting frame to the top of the inner ring steel ring, the lifting frame is lowered vertically by the Z-axis linear module, the bottom of the compensation block on the inclined surface first contacts the outer wall of the inner ring steel ring, and as the lifting frame continues to be lowered, the compensation block and the clamping block move upward along the inclined surface through the guide groove and the guide block until the hook head at the end of the hooking rod moves from the inlet of the upgoing long groove to the inlet of the downgoing short groove, and as the lifting frame continues to be lowered, the clamping block and the compensation block move outward and upward relative to the lifting frame, and the relative side of the compensation block is separated from the outer peripheral surface of the steel ring and is attached to the end surface, and the clamping block moves downward relative to the lifting frame, that is, the hook head enters the inlet of the upgoing short groove, and the clamping block also moves downward relative to the lifting frame after the compensation block moves downward, so that the relative side of the compensation block is always attached to the end surface of the steel ring, and the distance between the top of the clamping side of the clamping block and the bottom of the compensation block is less than or equal to the width of the clamping area, and as the lifting frame continues to be lowered, the clamping side of the compensation block and the clamping block enters the clamping area and is automatically hooked with the clamping area.

[0029] Preferably, when the sleeve ring needs to be gripped by the mechanical hand:

[0030] The X-axis linear module and the Y-axis linear module adjust the position of the lifting frame to the top of the inner ring steel ring, the lifting frame is lowered vertically by the Z-axis linear module, the bottom of the compensation block on the inclined surface first contacts the outer wall of the inner ring steel ring, and as the lifting frame continues to be lowered, the compensation block and the clamping block move upward along the inclined surface through the guide groove and the guide block until the hook head at the end of the hooking rod moves from the inlet of the upgoing long groove to the inlet of the downgoing short groove, and as the lifting frame continues to be lowered, the clamping block and the compensation block move outward and upward relative to the lifting frame, and the relative side of the compensation block is separated from the outer peripheral surface of the steel ring and is attached to the end surface, and the clamping block moves downward relative to the lifting frame, that is, the hook head enters the inlet of the upgoing short groove, and the clamping block also moves downward relative to the lifting frame after the compensation block moves downward, so that the relative side of the compensation block is always attached to the end surface of the steel ring, and the distance between the top of the clamping side of the clamping block and the bottom of the compensation block is less than or equal to the width of the clamping area, and as the lifting frame continues to be lowered, the clamping side of the compensation block and the clamping block enters the clamping area and is automatically hooked with the clamping area.

[0031] Preferably, a grinding wheel dresser is arranged on the side of the grinding wheel facing away from the mounting station;

[0032] The grinding wheel dresser comprises a door-shaped frame body adjusted in two vertical directions horizontally relative to the grinding wheel, a first servo motor is arranged at the top of the door-shaped frame body, a swing arm is arranged at the output end of the first servo motor, the first servo motor adjusts the deflection angle of the swing arm, the swing arm is arranged in the door-shaped frame body, and a second servo motor and a moving frame are arranged on the swing arm, the second servo motor drives the moving frame to move along the length direction of the swing arm, and a dressing piece is arranged at the bottom of the moving frame, and the dressing piece is used for online dressing of the working surface of the grinding wheel.

[0033] Preferably, the bottom of the door-shaped frame body is provided with a slide base identical to the cross-shaped slide base structure.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The sleeve ring is supported and held at the mounting station by the radial support frame, is axially conveyed to the rotary disc under the action of the conveying cylinder, is matched through the positioning piece and the self-mounting hole on the sleeve ring, is then fixed by the electromagnet, and the inner channel is ground by the grinding wheel under the action of the grinding motor, so that the problem that the sleeve ring is easily left with clamping marks on the outer diameter due to clamping and fixing of the sleeve ring by the chuck in the prior art is avoided.

[0036] The radial support frame is provided with a central radial frame and side roller frames on both sides, the position of the central radial frame is adjusted through the adjusting cylinder, and then the side roller frames are adjusted to adapt to the support of sleeve rings of different specifications, and the top of the side roller frame is in rolling cooperation with the sleeve ring, and the rolling cylinder can be preferably parallel to the sleeve ring; during grinding, the grinding point of the grinding wheel is located in the region between the top of the two side roller frames, and the support interval between the two rolling cylinders is as small as possible under the condition of ensuring that the sleeve ring is prevented from being radially deviated and that the sleeve ring can be supported without being attracted, so that the problem of uneven stress in the prior art and the precision problem caused by the uneven stress are solved.

[0037] The inventor uses the mounting hole originally arranged on the end face of the bearing ring, and then adopts a special mechanical hand clamping structure to complete the vertical automatic clamping and automatic release of the workpiece, that is, the position of the compensation block relative to the clamping block on the clamping structure can be adjusted when the clamping structure moves vertically, the size of the coverage of the bottom surface of the compensation block and the clamping side of the clamping block is changed, the size is smaller than the size of the mounting through hole when clamping, and the workpiece is clamped by extrusion, the size is larger than the size of the mounting through hole when releasing, so that the workpiece cannot enter the mounting through hole again, and the workpiece falls under the gravity after clamping, so that the workpiece is located below the middle region of the lifting frame, and the workpiece reference is consistent every time.

[0038] Compared with the three-servo system, the four-servo trimming system has higher control precision, stronger dynamic performance, higher flexibility, stronger anti-overload capacity, and better stability, adaptability, and fault tolerance. These advantages help to improve the machining precision, machining efficiency, and machining quality, thereby meeting more stringent and diversified machining requirements. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the application;

[0040] Figure 2 It is a schematic diagram of the workpiece mounting structure of the application;

[0041] Figure 3 It is a front view of the radial support frame supporting the steel ring;

[0042] Figure 4 It is a schematic diagram of the overall structure of the workpiece feeding and discharging assembly of the application;

[0043] Figure 5 It is a state diagram of the lifting frame transporting the steel ring;

[0044] Figure 6 It is a state diagram of the lifting frame transporting the steel ring before the lifting frame transports the steel ring;

[0045] Figure 7 It is a state diagram of the lifting frame transporting the steel ring after the lifting frame transports the steel ring;

[0046] Figure 8 It is a connection relationship diagram of the compensation block and the clamping body of the application Figure 1 ;

[0047] Figure 9 It is a connection relationship diagram of the circulating guide groove and the hooking rod of the application

[0048] Figure 10 It is a connection relationship diagram of the compensation block and the clamping body of the application Figure 2 ;

[0049] Figure 11 It is a structure distribution diagram of the sliding table waterproof structure;

[0050] Figure 12 It is Figure 11 a local enlarged view of B in the middle;

[0051] Figure 13 It is a schematic diagram of the internal structure of the sliding table;

[0052] Figure 14 It is a connection relationship diagram of the driving protection cover and the extension plate two;

[0053] Figure 15Structure diagram of the structure for driving the protective cover;

[0054] Figure 16 Structure diagram of the structure for extending the first plate;

[0055] Figure 17 Structure diagram of the structure for the wiper blade;

[0056] Figure 18 Structure diagram of the structure for the side plate;

[0057] Figure 19 Structure diagram of the structure for the side plate and the lower fixed table;

[0058] Figure 20 Structure diagram of the overall structure of the grinding wheel dresser;

[0059] Figure 21 Connection relationship diagram of the swing arm and the moving frame of the present application;

[0060] Figure 22 Back view diagram of the swing arm and the moving frame of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0062] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0063] Embodiment 1, a grinding process for the inner groove of a bearing ring, the steps are as follows:

[0064] S100, ring feeding

[0065] The ring is fed by the mechanical hand to the radial support frame 40, the top of the radial support frame 40 is in rolling fit with the ring, and the bottom of the radial support frame 40 is provided with a conveying cylinder 41, which drives the radial support frame 40 to axially convey the ring to the installation station;

[0066] S200, ring clamping

[0067] The cross-shaped sliding table 10 is installed at the installation station, the cross-shaped sliding table 10 is slidingly installed at the bottom of the radial support frame 40, the servo motor 20, the rotating shaft 21 and the rotating disc 22 are installed on the cross-shaped sliding table 10, the servo motor 20 drives the rotating disc 22 to rotate at high speed through the rotating shaft 21, the positioning piece 222 is installed on the rotating disc 22 and used for limiting the circumferential movement of the sleeve ring, and the electromagnet 221 is also installed on the rotating disc 22 and used for axially adsorbing and fixing the sleeve ring;

[0068] S300, inner channel grinding processing

[0069] The relative position between the motor on the cross-shaped sliding table 10 and the grinding wheel 51 is adjusted, the grinding wheel 51 is driven to rotate at high speed by the grinding motor 52, and the grinding wheel 51 is used for grinding processing of the inner channel of the sleeve ring;

[0070] S400, sleeve ring blanking

[0071] After the grinding processing is completed, the electromagnet 221 is powered off to release the sleeve ring, the sleeve ring is completely supported by the radial support frame 40, and the position is adjusted to the installation station through the conveying cylinder 41;

[0072] S500, grinding wheel dressing

[0073] The grinding wheel dresser is arranged on the side of the grinding wheel 51 opposite to the installation station and is used for fine dressing of the grinding wheel 51.

[0074] The radial support frame 40 is provided with the central radial frame 401, the side rolling frames 402 symmetrically arranged on both sides and the adjusting cylinder 403 used for driving the central radial frame 401 to move, the side rolling frames 402 are rotationally installed on the radial support frame 40, the central radial frame 401 is slidingly installed on the radial support frame 40, the movement direction of the central radial frame 401 is towards the sleeve ring axis direction, the two sides of the central radial frame 401 are provided with the inclined guide surfaces, the inclined guide surfaces are arranged at an angle of 45° in the movement direction of the central radial frame 401, the bottoms of the two side rolling frames 402 are attached to the inclined guide surfaces and are connected through the springs 404, and the grinding point of the grinding wheel 62 is located in the region between the tops of the two side rolling frames 402. The position of the central radial frame 401 is adjusted through the adjusting cylinder 403, the bottoms of the side rolling frames 402 are adjusted through the inclined guide surfaces, the springs 404 are stretched or contracted, the opening angle is changed, different specifications of the sleeve rings are supported, the side rolling frame 402 at the bottom is located at least on the right side of the bottom of the sleeve ring and the included angle between the side rolling frame 402 and the vertical plane is 5-15°, and the sleeve ring is prevented from falling during the support.

[0075] The mechanical hand comprises the X-axis linear module 31, the Y-axis linear module 32, the Z-axis linear module 33 and the clamping module 34.

[0076] The X-axis linear module 31 is used for adjusting the position of the clamping module 34 along the X-axis;

[0077] The Y-axis linear module 32 is used for adjusting the position of the clamping module 34 along the Y-axis;

[0078] The Z-axis linear module 33 is used for adjusting the position of the clamping module 34 along the Z-axis;

[0079] The clamping module 34 is used for automatically clamping / loosing the ferrule.

[0080] The clamping module 34 comprises a lifting frame 341, the side of the lifting frame 341 is provided with a guide hole which is inclined downwardly towards the middle part and the angle between the guide hole and the horizontal plane is 45°, a guide pin 342 is installed in the guide hole, the bottom of the guide pin 342 is connected with a clamping block 343, the top end of the clamping block 343 is slidably installed in the guide hole, the bottom end of the clamping block 343 is provided with a compensation block 344 which is inclined upwardly towards the middle part of the lifting frame 341, the compensation block 344 is inclinedly movable relative to the clamping block 343, the bottom end of the clamping block 343 is provided with a compensation inclined surface which is inclined upwardly towards the middle part, the compensation inclined surface is provided with a guide groove 345 and a circulating guide groove 346, the compensation block 344 is provided with a guide block 347 which is matched with the guide groove 345 and a hooking rod member 348 which is rotatably installed, the hooking rod member 348 is a thin rod member and the end thereof is provided with a hook head 349, the hook head 349 reciprocally moves along the circulating guide groove 346.

[0081] The circulating guide groove 346 comprises an uplink long groove 3461, a downlink short groove 3462, an uplink short groove 3463 and a downlink long groove 3464, and the depth of the inlet of each of the grooves is smaller than the depth of the outlet of each of the grooves;

[0082] The uplink long groove 3461 and the downlink long groove 3464 are symmetrically arranged, and the downlink short groove 3462 and the uplink short groove 3463 are symmetrically arranged;

[0083] The inlet of the uplink long groove 3461 and the outlet of the downlink long groove 3464 meet, the outlet of the uplink long groove 3461 and the inlet of the downlink short groove 3462 meet, the outlet of the downlink short groove 3462 and the inlet of the uplink short groove 3463 meet, and the outlet of the uplink short groove 3463 and the inlet of the downlink long groove 3464 meet;

[0084] The height of the meeting point of the outlet of the downlink short groove 3462 and the inlet of the uplink short groove 3463 is lower than the height of the meeting point of the outlet of the uplink long groove 3461 and the inlet of the downlink short groove 3462;

[0085] The height of the meeting point of the outlet of the uplink long groove 3461 and the inlet of the downlink short groove 3462 is flush with the height of the meeting point of the outlet of the uplink short groove 3463 and the inlet of the downlink long groove 3464.

[0086] When the mechanical hand is needed to clamp the ferrule:

[0087] The X-axis linear module 31 and the Y-axis linear module 32 adjust the lifting frame 341 to be located at the top of the inner steel ring, and the lifting frame 341 is lowered vertically through the Z-axis linear module 33. The bottom of the compensation block 344 on the compensation slope of the clamping block 343 first contacts the outer wall of the inner steel ring. As the lifting frame 341 continues to be lowered, it moves upward along the compensation slope through the guide groove 345 and the guide block 347 until the hook head 349 at the end of the hook rod 348 moves from the entrance of the upward long groove 3461 to the entrance of the downward short groove 3462. As the lifting frame 341 continues to be lowered, the clamping block 343 and the compensation block 344 move obliquely upward to the outside relative to the lifting frame 341 The hook 349 moves downwards relative to the upper short groove 3463, and the clamping block 343 also moves downwards relative to the lifting frame 341 after the compensation block 344 moves downwards relative to the lifting frame 341, ensuring that the opposite side of the compensation block 344 is always in contact with the end face of the steel ring. At this time, the distance between the top of the clamping side of the clamping block 343 and the bottom of the compensation block 344 is less than or equal to the width of the clamping area. As the lifting frame 341 continues to lower, the clamping sides of the compensation block 344 and the clamping block 343 enter the clamping area, and will automatically enter and hook with the clamping area.

[0088] When the robot needs to loosen the ring:

[0089] The X-axis linear module 31 and the Y-axis linear module 32 adjust the position of the lifting frame 341 to move the inner steel ring to the top of the target station, and the Z-axis linear module 33 vertically lowers the lifting frame 341. When the bottom of the inner steel ring falls on the station, as the lifting frame 341 continues to be lowered, the bottom of the compensation block 344 will first abut against the bottom of the clamping area, and as it continues to be lowered, the hook head 349 will enter the entrance of the downward long slot 3464, and then as it continues to be lowered, the compensation block 344 and the clamping block 343 will be relative to the clamping area. Move outward until the compensation block 344 and the clamping block 343 are completely out of the clamping area. After being out of the clamping area, the compensation block 344 moves downward relative to the clamping block 343, that is, the hook head 349 enters the entrance of the upward long groove 3461. At this time, the distance between the bottom surface of the compensation block 344 and the top surface of the clamping side of the clamping block 343 is greater than the width of the clamping area, and it is ensured that the top surface of the compensation block 344 does not separate from the top end surface of the inner ring steel ring. Finally, the lifting frame 341 is driven upward vertically by the Z-axis linear module 33 to complete the action of automatically separating from the inner ring steel ring.

[0090] In the grinding process, a grinding wheel dresser is arranged on the side of the grinding wheel 51 opposite to the mounting station; the grinding wheel dresser comprises a door-shaped frame body 60 adjusted in two vertical directions horizontally relative to the grinding wheel 51, the top of the door-shaped frame body 60 is provided with a first servo motor 61, the output end of the first servo motor 61 is provided with a swing arm 62, the first servo motor 61 adjusts the deflection angle of the swing arm 62, the swing arm 62 is located in the door-shaped frame body 60, and the swing arm 62 is provided with a second servo motor 63 and a moving frame 64, the second servo motor 63 drives the moving frame 64 to move along the length direction of the swing arm 62, the bottom of the moving frame 64 is provided with a dressing piece 65 and a driver 66 for driving the dressing piece 65 to rotate, and the dressing piece 65 is used for on-line dressing of the working surface of the grinding wheel 51. By adding the second servo motor 13, the situation that the working surface has a complex structure can be coped with, the fault tolerance is improved, the problem that the precision of the bottom cross-shaped sliding table does not meet the grinding requirement of the grinding wheel can be avoided, therefore, the four-servo dressing system has higher control precision, stronger dynamic performance, higher flexibility, stronger anti-overload capacity and better stability, adaptability, fault tolerance and other advantages compared with the three-servo system. These advantages are helpful to improve the machining precision, machining efficiency and machining quality, so as to meet more strict and diversified machining requirements.

[0091] The bottom of the door-shaped frame body 60 is provided with a sliding table base which has the same structure as the cross-shaped sliding table 10.

[0092] The X-axis sliding table assembly and the Y-axis sliding table assembly both comprise an upper sliding table 101, a lower fixed table 102 and a driving protective cover 103, the driving protective cover 103 is fixedly installed at one end of the lower fixed table 102, the upper sliding table 101 is slidingly installed on the lower fixed table 102, and the two sides of the lower fixed table 102 are both provided with a water retaining groove 1021.

[0093] The X-axis sliding table assembly and the Y-axis sliding table assembly further comprise:

[0094] An extension plate one 104 is installed at one end of the lower fixed table 102, and the side part is provided with a water retaining groove one 1041;

[0095] An extension plate two 105 is installed at the other end of the lower fixed table 102, the side part is provided with a water retaining groove two 1051, and the driving protective cover 103 is installed on the extension plate two 105;

[0096] A side baffle 106 is installed at the two side parts of the upper sliding table 101, the side baffle 106 is provided with an inwardly extending retaining strip 1061 near the bottom position, and the retaining strip 1061 is matched with the water retaining groove one 1041, the water retaining groove two 1051 and the water retaining groove three 1021;

[0097] The end cover 107 is installed on the upper slide 101 far from the driving shield 103, and the bottom is provided with a wiper 1071 which contacts the upper surface of the extension plate 104;

[0098] The end cover 108 is installed on the upper slide 101 close to the driving shield 103, and the bottom is provided with a wiper 1081 which contacts the outer surface of the driving shield 103.

[0099] The blocking strip 1061 is arranged obliquely upward, and the upper surface of the blocking strip 1061 and the inner upper wall of the water retaining groove form an airflow compression area. A high-pressure blowing assembly is installed on the side baffle 106, and is used to blow to the airflow compression area at the joint of the blocking strip 1061 and the side baffle 106. The upper surface of the blocking strip 1061 is provided with a waterproof rubber strip 1062 close to the end position, and the waterproof rubber strip 1062 is in a sheet structure and the free end gradually deviates from the side baffle 106 and gradually approaches the inner upper wall of the water retaining groove.

[0100] The high-pressure blowing assembly includes an external pipe joint 1064 installed on the side baffle 106 and a blowing strip 1063 installed on the inner wall of the side baffle 106. The blowing strip 1063 is provided with a uniform gas cavity which communicates with the external pipe joint 1064, and the bottom of the uniform gas cavity is provided with a high-pressure gas hole 1065.

[0101] The joint of the blocking strip 1061 and the side baffle 106 is provided with a flow guide 1066 which is used to divert the high-pressure gas from the high-pressure gas hole 1065 to the area between the blocking strip 1061 and the water retaining groove.

[0102] When the upper slide 101 moves relative to the lower fixed table 102, the high-pressure gas blows through the high-pressure gas hole 1065 to fold the top of the waterproof rubber strip 1062 outward and separate it from the inner upper wall of the water retaining groove.

[0103] When the upper slide 101 is stationary relative to the lower fixed table 102, the high-pressure gas does not blow, and the top of the waterproof rubber strip 1062 adheres to the inner upper wall of the water retaining groove to form a waterproof structure.

[0104] Through years of design experience and customer feedback problems, the inventor found that during grinding, grinding fluid needs to be applied to the grinding wheel and workpiece, which carries grinding dust and easily enters the slide to damage the slide, resulting in the inability to complete ultra-high precision machining of workpiece feeding accuracy. Therefore, the end and side of the slide assembly are improved, the end is sealed by end cover two and end cover one, the surface of the extension plate is cleaned by the water scraping plate, the side is adapted by multiple blocking strips and water blocking grooves to form multiple sealing structures arranged up and down to prevent grinding fluid from entering. At the same time, a high-pressure gas blowing part is also arranged on the inner side of the slide assembly, which can blow high pressure when the upper slide slides relative to the lower fixed table, forming a directional airflow from inside to outside to form a dynamic sealing structure to prevent grinding fluid from entering; when the upper slide is stationary relative to the lower fixed table, the top of the waterproof rubber strip will be attached to the inner side of the upper wall of the water blocking groove to form a static sealing structure to prevent grinding fluid from entering. The selective operation of dynamic and static sealing can effectively realize the sealing operation of the feeding work, thereby ensuring that the slide assembly has a long service life under complex working conditions, and also ensures the machining precision of the grinding machine.

[0105] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. The alternatives can be partial structure, device, method step alternatives, or complete technical solutions. According to the technical solutions and inventive concepts of the present application, equivalent replacement or change should be covered within the protection scope of the present application.

Claims

1. A grinding process for the inner groove of a bearing ring, characterized in that: Here are the steps: S100, Ring loading The ring is loaded onto the radial support bracket (40) by a robot, the top of the radial support bracket (40) and the ring are rollingly matched, and a conveying cylinder (41) is installed at the bottom of the radial support bracket (40). The conveying cylinder (41) drives the radial support bracket (40) to axially convey the ring to the installation station; S200, ferrule clamping A cross-shaped slide (10) is installed at the installation station. The cross-shaped slide (10) is slidably installed at the bottom of the radial support bracket (40). A servo motor (20), a rotary shaft (21) and a rotary disk (22) are installed on the cross-shaped slide (10). The servo motor (20) drives the rotary disk (22) to perform high-speed rotary motion via the rotary shaft (21). A positioning member (222) is installed on the rotary disk (22) for limiting the circumferential motion of the ring. An electromagnet (221) is also installed on the rotary disk (22) for axially adsorbing and fixing the ring; S300, inner groove grinding The servo motor (20) on the cross slide (10) is controlled to adjust the relative position between the ferrule and the grinding wheel (51), and the grinding wheel (51) is driven by the grinding motor (52) to rotate at high speed, and the grinding wheel (51) grinds the groove inside the ferrule; S400, Ring Cutting After the grinding process is completed, the electromagnet (221) is powered off to release the ferrule, and the ferrule is completely supported by the radial support bracket (40) and adjusted to the installation position by the conveying cylinder (41); S500, grinding wheel dressing The grinding wheel dresser is arranged on a side of the grinding wheel (51) facing away from the installation station to perform fine dressing on the grinding wheel (51); The radial support frame (40) is provided with a central radial frame (401), side roller frames (402) symmetrically distributed on both sides, and an adjusting cylinder (403) for driving the central radial frame (401) to move. The side roller frames (402) are rotatably mounted on the radial support frame (40), and the central radial frame (401) is slidably mounted on the radial support frame (40), and the movement direction of the central radial frame (401) is toward the axis direction of the ring. Slope guide surfaces are provided on both sides of the central radial frame (401), and the slope guide surfaces are arranged at 45 degrees to the movement direction of the central radial frame (401). The bottoms of the two side roller frames (402) are attached to the slope guide surfaces and the two are connected via a spring (404). The grinding point of the grinding wheel (51) is located in the area between the tops of the two side roller frames (402).

2. A grinding process for the inner groove of a bearing ring according to claim 1, characterized in that: The manipulator comprises an X-axis linear module (31), a Y-axis linear module (32), a Z-axis linear module (33) and a clamping module (34); The X-axis linear module (31) is used to adjust the position of the clamping module (34) along the X-axis; The Y-axis linear module (32) is used to adjust the position of the clamping module (34) along the Y-axis; The Z-axis linear module (33) is used to adjust the position of the clamping module (34) along the Z-axis; The clamping module (34) is used for automatically clamping / relaxing the ring.

3. A grinding process for the inner groove of a bearing ring according to claim 2, characterized in that: The clamping module (34) includes a lifting frame (341), and the side of the lifting frame (341) is provided with a guide hole facing the middle and obliquely downward, the angle between the guide hole and the horizontal plane is 45 degrees, a guide pin (342) is installed in the guide hole, the bottom of the guide pin (342) is connected to the clamping block (343), the top side of the clamping block (343) is slidably installed with a compensation block (344) in the guide hole, and the bottom side relative to the middle of the lifting frame (341) is provided with an oblique upward compensation block (344), and the compensation block (344) is relatively The clamping block (343) moves obliquely, and a compensation slope is provided on the side opposite to the bottom end of the clamping block (343) obliquely upward toward the middle, and a guide groove (345) and a circulation guide groove (346) are provided on the compensation slope. A guide block (347) adapted to the guide groove (345) and a rotatably arranged hook rod (348) are provided on the compensation block (344). The hook rod (348) is a thin rod and a hook head (349) is provided at the end thereof. The hook head (349) reciprocates along the circulation guide groove (346).

4. A grinding process for the inner groove of a bearing ring according to claim 3, characterized in that: The circulation guide groove (346) includes an upward long groove (3461), a downward short groove (3462), an upward short groove (3463) and a downward long groove (3464), and the inlet depth of each is smaller than the outlet depth; The upward long groove (3461) and the downward long groove (3464) are symmetrically arranged, and the downward short groove (3462) and the upward short groove (3463) are symmetrically arranged; The inlet of the ascending long trough (3461) intersects with the outlet of the descending long trough (3464), the outlet of the ascending long trough (3461) intersects with the inlet of the descending short trough (3462), the outlet of the descending short trough (3462) intersects with the inlet of the ascending short trough (3463), and the outlet of the ascending short trough (3463) intersects with the inlet of the descending long trough (3464); The height of the intersection of the outlet of the descending short trough (3462) and the inlet of the ascending short trough (3463) is lower than the height of the intersection of the outlet of the ascending long trough (3461) and the inlet of the descending short trough (3462); The height of the intersection of the outlet of the ascending long trough (3461) and the inlet of the descending short trough (3462) is flush with the height of the intersection of the outlet of the ascending short trough (3463) and the inlet of the descending long trough (3464).

5. A grinding process for the inner groove of a bearing ring according to claim 4, characterized in that: When the manipulator is required to clamp the ring: The X-axis linear module (31) and the Y-axis linear module (32) adjust the lifting frame (341) to be located at the top of the inner steel ring, and the lifting frame (341) is lowered vertically through the Z-axis linear module (33). The bottom of the compensation block (344) on the compensation slope of the clamping block (343) first contacts the outer wall of the inner steel ring. As the lifting frame (341) continues to be lowered, it moves upward along the compensation slope through the cooperation of the guide groove (345) and the guide block (347) until the hook head (349) at the end of the hook rod (348) moves from the entrance of the upper long groove (3461) to the entrance of the lower short groove (3462). As the lifting frame (341) continues to be lowered, the clamping block (343) and the compensation block (344) move outward relative to the lifting frame (341). It moves obliquely upward until the opposite side of the compensation block (344) is separated from the outer peripheral surface of the steel ring and fits on the end surface, and moves downward relative to the clamping block (343), that is, the hook head (349) enters the entrance of the upward short groove (3463), and the clamping block (343) also moves downward relative to the lifting frame (341) after the compensation block (344) moves downward relative to the lifting frame (341), ensuring that the opposite side of the compensation block (344) is always fitted on the end surface of the steel ring. At this time, the distance between the top of the clamping side of the clamping block (343) and the bottom of the compensation block (344) is less than or equal to the width of the clamping area. As the lifting frame (341) continues to be lowered, the clamping sides of the compensation block (344) and the clamping block (343) enter the clamping area and automatically enter and hook with the clamping area.

6. A grinding process for the inner groove of a bearing ring according to claim 4, characterized in that: When the robot needs to loosen the ring: The X-axis linear module (31) and the Y-axis linear module (32) adjust the position of the lifting frame (341) to move the inner steel ring to the top of the target workstation, and the lifting frame (341) is lowered vertically by the Z-axis linear module (33). When the bottom of the inner steel ring falls on the workstation, as the lifting frame (341) continues to be lowered, the bottom of the compensation block (344) will first abut against the bottom of the clamping area, and as it continues to be lowered, the hook head (349) will enter the entrance of the downward long slot (3464), and then as it continues to be lowered, the compensation block (344) and the clamping block (343) will be relative to the clamping area. Move outward until the compensation block (344) and the clamping block (343) are completely out of the clamping area. After being out of the clamping area, the compensation block (344) moves downward relative to the clamping block (343), that is, the hook head (349) enters the entrance of the upward long groove (3461). At this time, the distance between the bottom surface of the compensation block (344) and the top surface of the clamping side of the clamping block (343) is greater than the width of the clamping area, and it is ensured that the top surface of the compensation block (344) does not separate from the top end surface of the inner ring steel ring. Finally, the Z-axis linear module (33) drives the lifting frame (341) upward vertically to complete the action of automatically separating from the inner ring steel ring.

7. The grinding process for the inner groove of a bearing ring according to claim 1, characterized in that: The grinding wheel dresser comprises a door-shaped frame (60) that is adjustable in two vertical directions relative to the grinding wheel (51). A No. 1 servo motor (61) is installed on the top of the door-shaped frame (60). A swing arm (62) is installed at the output end of the No. 1 servo motor (61). The No. 1 servo motor (61) adjusts the deflection angle of the swing arm (62). The swing arm (62) is located in the door-shaped frame (60). A No. 2 servo motor (63) and a movable frame (64) are installed on the swing arm (62). The No. 2 servo motor (63) drives the movable frame (64) to move along the length direction of the swing arm (62). A dressing piece (65) and a driver (66) for driving the dressing piece (65) to rotate are installed at the bottom of the movable frame (64). The dressing piece (65) is used for online dressing of the working surface of the grinding wheel (51).

8. A grinding process for the inner groove of a bearing ring according to claim 7, characterized in that: The bottom of the door-shaped frame (60) is provided with a slide base having the same structure as the cross-shaped slide (10).

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