CN115213803A - Bearing outer raceway rotation dynamic pressure polishing device and working method thereof - Google Patents
Bearing outer raceway rotation dynamic pressure polishing device and working method thereof Download PDFInfo
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- CN115213803A CN115213803A CN202210834299.5A CN202210834299A CN115213803A CN 115213803 A CN115213803 A CN 115213803A CN 202210834299 A CN202210834299 A CN 202210834299A CN 115213803 A CN115213803 A CN 115213803A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 126
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- 239000000463 material Substances 0.000 claims description 36
- 230000033001 locomotion Effects 0.000 claims description 26
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000003082 abrasive agent Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 11
- 230000003746 surface roughness Effects 0.000 description 6
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- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000007518 final polishing process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/003—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor whereby the workpieces are mounted on a holder and are immersed in the abrasive material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
- B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a bearing outer raceway rotation dynamic pressure polishing device and a working method thereof. The polishing wheel rotating mechanism is connected with the polishing wheel, the polishing wheel and a workpiece are controlled to keep a certain distance to rotate relatively, and the polishing wheel rolls the abrasive medium into a gap generated by the polishing wheel and the workpiece. The invention adopts loose fluid abrasive material to polish, can obtain the ferrule polishing surface with better surface quality, and has simple structure, simple operation and strong applicability.
Description
Technical Field
The invention relates to the technical field of bearing processing, in particular to a rotary dynamic pressure polishing device for an outer raceway of a bearing and a working method thereof.
Background
The bearing is a key basic part which is widely applied, and the ring raceway is the most main working surface of the bearing during operation, and the shape precision and the surface quality of the ring raceway have very important influence on the performance of the bearing, such as the operation precision, the service life, vibration noise and the like.
At present, the final polishing process of the outer raceway of the bearing ring generally adopts a fixed abrasive grinding tool such as oilstone to carry out ultra-precision machining. But with the technical progress and the improvement of the bearing performance, the requirements on the surface smoothness of the raceway of the ring are higher and higher. In order to meet the requirements of service performance, the surface roughness of the bearing ring raceway is high, in this case, the superfinishing using the traditional fixed abrasive cannot meet the processing requirements, and a new method is needed to meet the requirements of the higher surface roughness polishing processing.
Disclosure of Invention
In view of the above-mentioned problems, an apparatus and a method for polishing a bearing outer race by rotational dynamic pressure are provided. The technical means adopted by the invention are as follows:
the utility model provides a rotatory dynamic pressure burnishing device of bearing outer raceway, includes main shaft rotary mechanism, material jar, throwing aureola rotary mechanism and throwing aureola position appearance guiding mechanism, main shaft rotary mechanism is used for installing and treats the polishing bearing ring to rotate, treat that the polishing bearing ring sets up in the material jar, under operating condition, is equipped with fluid abrasive medium in the material jar, throwing aureola position appearance guiding mechanism is used for adjusting the position appearance of throwing aureola for treating the polishing bearing ring, throwing aureola structure and treating the adaptation of polishing bearing ring, and there is the predetermined space between the two under operating condition, throwing aureola rotary mechanism links to each other with the throwing aureola, and control throwing aureola and work piece keep a certain distance and carry out relative rotation, and the throwing aureola is drawn into the abrasive medium in the clearance that throwing aureola and work piece produced.
The polishing machine further comprises a machine body, the spindle rotating mechanism is arranged on the machine body, the material cylinder is arranged on the machine body, the polishing wheel pose adjusting mechanism is arranged on the machine body, the spindle rotating mechanism comprises a servo motor, a planetary reducer and a spindle, the output end of the servo motor is connected with the spindle through the planetary reducer, and a bearing ring to be polished is arranged on the spindle.
Further, the material jar includes the material jar ladle body and connects the material jar chassis in the material jar ladle body below, and the material jar chassis passes through the bolt and installs the completion on sealed dish and fix, and the bottom of sealed dish is fixed on the desktop of lathe bed through the support column, and the main shaft adopts the packing with sealed dish sealing mode and seals.
Further, throw aureola rotary mechanism and pass the cab apron and install on throwing aureola position appearance guiding mechanism, throw aureola rotary mechanism and include direct current brushless motor, motor support, shaft coupling, connecting rod, area seat bearing and bearing mounting bracket, throw aureola and install on the connecting rod, connecting rod and direct current brushless motor pass through the shaft coupling and connect and the transmission, are equipped with between them area seat bearing, area seat bearing passes through the bearing mounting bracket and installs on passing the cab apron, direct current brushless motor passes through motor support mounting and passes through on the cab apron.
Further, the coupling is a quincunx elastic coupling.
Further, the polishing wheel pose adjusting mechanism comprises a position adjusting mechanism, a reciprocating linear motion mechanism, an angle adjusting mechanism and a distance adjusting mechanism, wherein the angle adjusting mechanism, the reciprocating linear motion mechanism and the distance adjusting mechanism are connected with the position adjusting mechanism through the position adjusting mechanism connecting base plate, the position adjusting mechanism is used for adjusting the spatial position of each mechanism connected to the position adjusting mechanism, the angle adjusting mechanism is used for adjusting the angle of the polishing wheel rotating mechanism, a guide rail of the reciprocating linear motion mechanism is arranged on the angle adjusting mechanism and used for adjusting the direction of reciprocating linear motion to adapt to different bearing rings to be polished, and the distance adjusting mechanism is used for adjusting the relative distance between the polishing wheel and a workpiece.
Further, the burnishing wheel includes straight-tooth burnishing wheel, and straight-tooth burnishing wheel is used for the polishing processing of cylinder or circular cone raceway, the trompil that is used for connecting the connecting rod of burnishing wheel rotary mechanism is seted up at straight-tooth burnishing wheel center, and it carries out the transmission through ordinary parallel key, straight-tooth burnishing wheel includes a plurality of teeth of a cogwheel, has seted up the screw on one of them tooth's socket for installation holding screw is with fixed burnishing wheel and connecting rod.
Further, the polishing wheel comprises a convex tooth polishing wheel, the convex tooth polishing wheel is used for polishing the spherical roller path, the center of the convex tooth polishing wheel is provided with an opening used for connecting a connecting rod of the polishing wheel rotating mechanism, the opening is transmitted through a common flat key, a convex tooth part is arranged in the middle of the wheel teeth and is a preset arc surface, and a screw hole is formed in one tooth groove and used for installing a set screw to fix the polishing wheel and the connecting rod.
The invention also discloses a bearing outer raceway rotation dynamic pressure polishing method adopting the bearing outer raceway rotation dynamic pressure polishing device, which comprises the following steps:
and 4, starting polishing, wherein the polishing wheel winds the grinding medium into a gap generated between the polishing wheel and the bearing ring to be polished, and the bearing ring to be polished is processed.
The invention has the following advantages:
1. this apparatus differs from conventional polishing apparatuses in that it uses a loose fluid abrasive rather than a fixed abrasive for the polishing process. Polishing with a loose fluid abrasive may result in a smoother ferrule polishing surface than polishing with a fixed abrasive tool.
2. By adopting the design scheme of the polishing wheel, the forming condition of dynamic pressure polishing of the bearing outer raceway is provided, the polishing wheel has the characteristics of simple structure, simplicity in operation, strong applicability and the like, the polishing requirements of most of the outer raceways of the bearing ring can be met, and only different types of polishing wheels need to be replaced aiming at different types of bearing rings.
3. Polishing processing is carried out based on dynamic pressure effect and hardening phenomenon of the specially-made flexible abrasive medium, the abrasive medium can be repeatedly recycled, tool loss and working hour loss in the fixed abrasive polishing process are reduced, and production cost is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of the main structure of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1A;
FIG. 3 is a schematic view of a spur polishing wheel for an outer raceway of a cylindrical or conical bearing;
FIG. 4 is a schematic view of a convex tooth polishing wheel for a spherical outer raceway;
FIG. 5 is a schematic view of a convex tooth polishing wheel installation.
In the figure: 1. a bed body; 2. a spindle rotating mechanism; 201. a main shaft; 3. a support pillar; 4. sealing the disc; 5. a material cylinder chassis; 6. a material cylinder barrel body; 7. a distance adjusting mechanism; 701. dovetail pallet rails; 702. a hand wheel; 8. a reciprocating linear motion mechanism; 9. a position adjustment mechanism; 10. an L-shaped bracket; 11. a motor bracket; 12. a quincunx elastic coupling; 13. workpiece-tapered roller bearing ring; 14. the outer raceway of the cylindrical or conical bearing is provided with a straight-tooth polishing wheel; 15. a connecting rod; 16. a pedestal bearing; 17. a bearing mounting bracket; 18. a DC brushless motor; 19. an angle adjusting plate; 20. a transition plate; 21. a convex tooth polishing wheel for the spherical outer raceway; 22. workpiece-ball bearing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the invention discloses a bearing outer raceway rotation dynamic pressure polishing device, which comprises a main shaft rotation mechanism, a material cylinder, a polishing wheel rotation mechanism and a polishing wheel pose adjusting mechanism, wherein the main shaft rotation mechanism 2 is used for installing a bearing ring to be polished and driving the polishing bearing ring to rotate, the bearing ring to be polished is arranged in the material cylinder, a fluid abrasive medium is arranged in the material cylinder in a working state, the polishing wheel pose adjusting mechanism is used for adjusting the pose of the polishing wheel relative to the bearing ring to be polished, the polishing wheel structure is matched with the bearing ring to be polished, a preset gap is formed between the polishing wheel rotation mechanism and the polishing wheel in the working state, the polishing wheel rotation mechanism is connected with the polishing wheel to control the polishing wheel and a workpiece to keep a certain distance for relative rotation, and the polishing wheel rolls the abrasive medium into the gap formed between the polishing wheel and the workpiece.
The invention is different from the traditional fixed abrasive polishing processing in principle, uses flexible abrasive medium to replace the traditional fixed abrasive to act as a cutter, and utilizes dynamic pressure effect to realize the high-efficiency polishing of the bearing outer raceway.
The polishing wheel posture adjusting mechanism comprises a servo motor, a planetary reducer and a main shaft, the planetary reducer and the servo motor are connected through bolts to form a whole, the output end of the servo motor is connected with the main shaft 201 through the planetary reducer, a bearing ring to be polished is arranged on the main shaft, a workpiece 13 is arranged on the main shaft 201, and the servo motor is started to drive the workpiece 13 to rotate.
The material jar includes the material jar ladle body 6 and connects the material jar chassis 5 in the material jar ladle body below, and the material jar chassis is installed through the bolt and is accomplished fixedly on sealed dish 4, and the bottom of sealed dish is fixed on the desktop of lathe bed through support column 3, and the material jar is at the function of polishing in-process storage abrasive material, and the main shaft adopts the packing to seal with sealed dish sealing method, and sealing medium selects for polytetrafluoroethylene packing.
The polishing wheel rotating mechanism is installed on the polishing wheel pose adjusting mechanism through a transition plate, the polishing wheel rotating mechanism comprises a direct current brushless motor 18, a motor support 11, a coupler, a connecting rod 15, a seated bearing 16 and a bearing installation frame 17, the polishing wheel is installed on the connecting rod, the connecting rod and the direct current brushless motor are connected and driven through the coupler, the seated bearing is arranged between the connecting rod and the direct current brushless motor, the seated bearing is installed on the transition plate through the bearing installation frame, and the direct current brushless motor is installed on the transition plate through the motor support. The tooth-shaped polishing wheel is made of high-hardness wear-resistant bearing steel, two fastening bolts are used for fixing through two M6 threaded holes in the tooth-shaped polishing wheel, the tooth-shaped polishing wheel and the connecting rod 15 are in transmission through a common flat key, the coupling is a quincunx elastic coupling, and the connecting rod 15 and the direct-current brushless motor 18 are connected and transmitted through the quincunx elastic coupling 12.
Polishing wheel position appearance guiding mechanism includes position adjustment mechanism 9, reciprocal linear motion mechanism 8, angle adjustment mechanism, distance guiding mechanism 7, angle adjustment mechanism, reciprocal linear motion mechanism and distance guiding mechanism pass through position adjustment mechanism connection bottom plate links to each other with position adjustment mechanism, position adjustment mechanism is used for adjusting the spatial position that each mechanism located on it of connecting, angle adjustment mechanism is used for adjusting the angle that polishing wheel rotary mechanism located, the guide rail of reciprocal linear motion mechanism is installed on angle adjustment mechanism for adjust reciprocal linear motion's direction, treat polishing bearing ring with the adaptation difference, distance guiding mechanism is used for adjusting the relative distance of polishing wheel and work piece.
In this embodiment, the position adjusting mechanism is a cross sliding table controlled by a stepping motor, and moves up and down and left and right through the cross sliding table, so as to adjust the position of the polishing structure relative to the workpiece to be processed, the cross sliding table is vertically fixed on the L-shaped bracket 10, the L-shaped bracket 10 is fixed on one side of the table top on the bed body 1, the X, Y shaft of the cross sliding table is driven by the stepping motor, and can drive the mechanism on the sliding table to complete up-down and left-right movement, and the connecting bottom plate is fixed on the sliding table of the cross sliding table and used for installing the reciprocating linear motion mechanism 8 and the distance adjusting mechanism 7.
The reciprocating linear motion mechanism is an asynchronous motor which drives the polishing structure to do reciprocating linear motion through an eccentric wheel mechanism, a guide rail sliding block and the like, and the asynchronous motor converts rotary motion into reciprocating linear motion through the eccentric mechanism and the guide rail sliding block.
The angle adjusting mechanism is an angle adjusting plate, and the angle of the axis of the tooth-shaped polishing wheel relative to the workpiece is adjusted by adjusting the angle of the angle adjusting plate relative to the dovetail supporting plate sliding block.
The distance adjusting mechanism is a dovetail supporting plate guide rail 701, the relative distance between the tooth-shaped polishing wheel and a workpiece is adjusted by adjusting the position of a sliding block of the dovetail supporting plate guide rail, in the embodiment, the position of the sliding block is adjusted by a hand wheel, in other optional implementation modes, other power sources can be selected to drive the form, and an angle adjusting plate 19 is arranged on a sliding table of the dovetail supporting plate. A guide rail in the reciprocating linear motion mechanism 8 is arranged on an angle adjusting plate 19 and is used for adjusting the direction of reciprocating linear motion so as to adapt to workpieces with different tapers, namely the tapered roller bearing ring 13; when the workpiece-ball bearing collar 22 is polished and processed using the convex-tooth polishing wheel, the reciprocating linear motion mechanism 8 does not operate. A transition plate 20 is arranged on a slide block in the reciprocating linear motion mechanism 8, and a polishing wheel rotating mechanism is arranged on the transition plate 20.
As shown in fig. 3, the polishing wheel includes a straight polishing wheel 14, the straight polishing wheel is used for polishing a cylindrical or conical raceway, an opening of a connecting rod used for connecting a polishing wheel rotating mechanism is formed in the center of the straight polishing wheel, the straight polishing wheel is driven through a common flat key, the straight polishing wheel includes a plurality of wheel teeth, and a screw hole is formed in one of the wheel teeth for installing a set screw to fix the polishing wheel and the connecting rod.
As shown in fig. 4 and 5, the polishing wheel includes a convex tooth polishing wheel 21, the convex tooth polishing wheel is used for polishing a spherical raceway of a workpiece-ball bearing ferrule 22, an opening for connecting a connecting rod of a polishing wheel rotating mechanism is formed in the center of the convex tooth polishing wheel, the opening is driven through a common flat key, a convex tooth part is arranged in the middle of a gear tooth and is a preset arc surface, and a screw hole is formed in one tooth groove and used for installing a set screw to fix the polishing wheel and the connecting rod. Due to the special shape of the convex tooth polishing wheel, when the spherical raceway is polished, the flanges on two sides of the raceway can be polished, so that the service performance of the ball bearing is further improved. The tooth-shaped polishing wheel is uniformly provided with groove structures with the same size in the circumferential direction, and all edges of the grooves are chamfered with round corners, so that the tooth-shaped polishing wheel can well roll grinding materials into gaps between the tooth-shaped polishing wheel and a workpiece, and the effects of material removal and finishing processing are achieved.
The invention also discloses a bearing outer raceway rotation dynamic pressure polishing method adopting the bearing outer raceway rotation dynamic pressure polishing device, which comprises the following steps:
and 4, starting polishing, wherein the polishing wheel rolls the abrasive medium into a gap between the polishing wheel and the bearing ring to be polished, and the bearing ring to be polished is processed.
Specifically, taking the workpiece-tapered roller bearing ring 13 as an example, when polishing it, the position adjusting mechanism 9 and the angle adjusting mechanism are first adjusted according to the shape and size of the workpiece to be processed, the taper and other relevant factors, so that the spur polishing wheel 14 for the outer raceway of the cylindrical or tapered bearing has its axis parallel to the generatrix of the workpiece-tapered roller bearing ring 13 and is in an appropriate position, and then the distance of the spur polishing wheel with respect to the workpiece 13 is adjusted by rotating the hand wheel 702. Then, a proper abrasive is selected according to the surface roughness of the existing workpiece-tapered roller bearing ring 13, and the selected abrasive medium is used as a 'cutter' in the processing method, and the abrasive medium generally mainly comprises a matrix, abrasive grains and an additive, wherein the types of the abrasive grains are generally carborundum, aluminum oxide, silicon carbide and the like. In addition, the grinding medium can be divided into a low-viscosity loose grinding medium and a high-viscosity elastic grinding medium according to the rheological property of the grinding medium, the low-viscosity loose grinding medium generally has better fluidity and is generally prepared by taking water or low-viscosity polymer as a matrix, adding abrasive particles and additives and mixing the matrix and the matrix in a certain proportion; the high-viscosity abrasive medium is mainly formed by mixing a high-viscosity polymer and an abrasive particle additive, the flowability is poor, and different abrasive media are selected according to different working conditions.
The selected abrasive medium is put into a material cylinder, and polishing can be carried out by selecting proper parameters including the rotating speed of a straight tooth polishing wheel 14 for the outer raceway of the cylindrical or conical bearing, the rotating speed of a workpiece 13, the distance between a polishing head and the workpiece and the like.
The operation steps for polishing and processing the workpiece-ball bearing ring 22 by the convex tooth polishing wheel 21 using the spherical outer raceway are the same as above.
When the surface quality requirement of the machined workpiece-tapered roller bearing ring 13 is high, the reciprocating linear motion mechanism 8 can be started, and at the moment, the polishing wheel can vibrate up and down along the bus direction of the workpiece, so that the texture along the circumferential direction of the workpiece can be effectively eliminated, the surface roughness is further reduced, the surface quality is improved, and the surface finishing machining of the part is realized.
The main action mechanism of the method is as follows: first, the hydrodynamic pressure mainly has three conditions: the two objects have enough relative movement speed, the fluid polishing medium has certain viscosity, and the gap between the polishing head and the roller path forms a wedge-shaped contraction flow channel. The polishing medium used by the method is a fluid abrasive medium, the medium has certain viscosity and fluidity, and when the medium is rapidly deformed, the medium shows a sharp change in viscosity and shows a hardening phenomenon; when the tooth-shaped polishing wheel and the workpiece keep a certain distance to rotate relatively, the clearance is converged rapidly, and then a dynamic pressure effect is formed. When the tooth-shaped polishing wheel rotates rapidly, an abrasive medium is drawn into a gap between the polishing wheel and a workpiece, the gap is rapidly reduced, so that the abrasive medium is hardened, at the moment, in a wedge-shaped processing area, the viscous fluid wraps abrasive particles to move at a high speed, and when the viscous fluid passes through a slit, a part of the abrasive particles are bound to collide with a micro-convex body on the processing surface, so that a certain impact load is generated. The abrasive particles impact and scratch the wall surface at a certain speed and angle, so that the original microscopic morphology of the processed surface is damaged, the material on the surface of the workpiece is damaged, and the convex part of the wall surface is firstly cut off, so that the surface roughness is greatly reduced. The device is also provided with a reciprocating linear motion mechanism, and when the cylindrical or conical roller path is polished, the polishing wheel can be driven to vibrate up and down along the bus direction of the workpiece, so that the aim is to eliminate the texture along the circumferential direction of the workpiece, further reduce the surface roughness of the workpiece, improve the surface quality of the workpiece and realize the finishing processing of the surface of the part.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a rotatory dynamic pressure burnishing device of bearing outer raceway, its characterized in that includes main shaft rotary mechanism, material jar, throwing aureola rotary mechanism and throwing aureola position appearance guiding mechanism, main shaft rotary mechanism is used for installing the bearing ring of waiting to polish, and drives the bearing ring of waiting to polish and rotate, the bearing ring of waiting to polish sets up in the material jar, under operating condition, is equipped with fluid abrasive medium in the material jar, throwing aureola position appearance guiding mechanism is used for adjusting the position appearance of throwing aureola for waiting to polish the bearing ring, throwing aureola and waiting to polish the bearing ring adaptation, and there is the clearance of predetermineeing between the two under operating condition, throwing aureola rotary mechanism links to each other with the throwing aureola, and control throwing aureola and work piece keep a certain distance and carry out relative rotation, and the throwing aureola is drawn into the abrasive medium in the clearance that throwing aureola work piece produced.
2. The rotary dynamic pressure polishing device for the outer raceway of a bearing according to claim 1, further comprising a bed, wherein the spindle rotating mechanism is mounted on the bed, the material cylinder is mounted on the bed, the polishing wheel pose adjusting mechanism is mounted on the bed, the spindle rotating mechanism comprises a servo motor, a planetary reducer and a spindle, an output end of the servo motor is connected with the spindle through the planetary reducer, and a bearing ring to be polished is mounted on the spindle.
3. The rotary dynamic pressure polishing device for the outer raceway of the bearing according to claim 1, wherein the material cylinder comprises a material cylinder barrel body and a material cylinder base plate connected below the material cylinder barrel body, the material cylinder base plate is mounted on the sealing plate through bolts to complete fixation, the bottom end of the sealing plate is fixed on a tabletop of the lathe bed through a support column, and the main shaft and the sealing plate are sealed by using packing.
4. The rotary dynamic pressure polishing apparatus for an outer raceway of a bearing according to claim 1, wherein the polishing wheel rotating mechanism is mounted on the polishing wheel attitude adjusting mechanism through a transition plate, the polishing wheel rotating mechanism includes a dc brushless motor, a motor holder, a coupling, a connecting rod, a mounted bearing, and a bearing mounting bracket, the polishing wheel is mounted on the connecting rod, the connecting rod and the dc brushless motor are connected and driven through the coupling, the mounted bearing is provided therebetween, the mounted bearing is mounted on the transition plate through the bearing mounting bracket, and the dc brushless motor is mounted on the transition plate through the motor holder.
5. The rotary dynamic pressure polishing apparatus for an outer race of a bearing according to claim 4, wherein said coupling is a quincunx elastic coupling.
6. The rotary dynamic pressure polishing device for the bearing outer raceway according to claim 1, wherein the polishing wheel pose adjusting mechanism comprises a position adjusting mechanism, a reciprocating linear motion mechanism, an angle adjusting mechanism and a distance adjusting mechanism, the angle adjusting mechanism, the reciprocating linear motion mechanism and the distance adjusting mechanism are connected with the position adjusting mechanism through the position adjusting mechanism connecting base plate, the position adjusting mechanism is used for adjusting the spatial positions of the mechanisms connected to the position adjusting mechanism, the angle adjusting mechanism is used for adjusting the angle of the polishing wheel rotating mechanism, a guide rail of the reciprocating linear motion mechanism is mounted on the angle adjusting mechanism and is used for adjusting the direction of reciprocating linear motion to adapt to different bearing rings to be polished, and the distance adjusting mechanism is used for adjusting the relative distance between the polishing wheel and a workpiece.
7. The rotary dynamic pressure polishing device for the outer raceway of the bearing as claimed in claim 1, wherein the polishing wheel comprises a straight polishing wheel, the straight polishing wheel is used for polishing the cylindrical or conical raceway, an opening for connecting a connecting rod of the polishing wheel rotary mechanism is formed in the center of the straight polishing wheel, the opening is driven through a common flat key, the straight polishing wheel comprises a plurality of gear teeth, and a screw hole is formed in one gear tooth groove and used for installing a set screw to fix the polishing wheel and the connecting rod.
8. The rotary dynamic pressure polishing device for the bearing outer raceway according to claim 1, wherein the polishing wheel comprises a convex tooth polishing wheel, the convex tooth polishing wheel is used for polishing the spherical raceway, an opening for connecting a connecting rod of the polishing wheel rotary mechanism is formed in the center of the convex tooth polishing wheel, the opening is used for transmission through a common flat key, a convex tooth part is arranged in the middle of a gear tooth and is a preset cambered surface, and a screw hole is formed in one tooth groove and used for installing a set screw to fix the polishing wheel and the connecting rod.
9. A bearing outer race rotational dynamic pressure working method using the bearing outer race rotational dynamic pressure polishing apparatus according to any one of claims 1 to 8, characterized by comprising the steps of:
step 1, assembling a device, wherein in the process, a polishing wheel is selected according to the specification of a bearing ring to be polished, and the polishing wheel is arranged on a polishing wheel rotating mechanism;
step 2, clamping the workpiece to be polished, and adjusting the spatial pose of the polishing wheel rotating mechanism through the polishing wheel pose adjusting mechanism;
step 3, selecting a proper abrasive, and injecting the abrasive into a material cylinder;
and 4, starting polishing, wherein the polishing wheel rolls the abrasive medium into a gap between the polishing wheel and the bearing ring to be polished, and the bearing ring to be polished is processed.
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| CN202210834299.5A CN115213803B (en) | 2022-07-14 | 2022-07-14 | Bearing ring outer raceway rotary dynamic pressure polishing device and working method thereof |
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| CN202210834299.5A CN115213803B (en) | 2022-07-14 | 2022-07-14 | Bearing ring outer raceway rotary dynamic pressure polishing device and working method thereof |
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| Publication number | Publication date |
|---|---|
| CN115213803B (en) | 2024-02-27 |
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