CN114131521A - Method and device for preforming superfine oilstone working surface of tapered roller - Google Patents
Method and device for preforming superfine oilstone working surface of tapered roller Download PDFInfo
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- CN114131521A CN114131521A CN202111523535.3A CN202111523535A CN114131521A CN 114131521 A CN114131521 A CN 114131521A CN 202111523535 A CN202111523535 A CN 202111523535A CN 114131521 A CN114131521 A CN 114131521A
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- roller
- oilstone
- tapered roller
- double
- cushion block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/009—Tools not otherwise provided for
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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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
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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
- B24B27/00—Other grinding machines or devices
- B24B27/0023—Other grinding machines or devices grinding machines with a plurality of working posts
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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
- B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
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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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
-
- 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
- B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a method and a device for preforming a tapered roller super-precision oilstone working surface, wherein the preforming method comprises the following steps: adjusting the posture of the tapered roller and the geometric relation between the tapered roller and the oilstone to be the same as that in the penetrating type superfinishing; the oilstone can do large-amplitude linear reciprocating motion relative to the tapered roller, and the motion direction of the oilstone is set to be the same as the penetrating motion direction of the roller relative to the oilstone in the superfinishing; the geometric dimension of the tapered roller is the same as that of the roller in the through type superfinishing, or the radius of the tapered roller is smaller than that of the roller in the superfinishing by an abrasive belt thickness value, the upper surface of the conical surface of the tapered roller is covered with an abrasive belt which is attached to the conical surface of the roller, the oilstone is pressed on the surface of the abrasive belt at a certain pressure to do linear reciprocating motion, and abrasive belt abrasive particles grind the working surface of the oilstone into a required shape; the preformed shape of the oilstone working surface formed by the grinding of the preforming method has high precision, and the preforming device has low manufacturing cost and simple and convenient operation.
Description
Technical Field
The invention relates to the field of machining and manufacturing, in particular to a method and a device for preforming a tapered roller super-precision oilstone working surface.
Background
A tapered roller bearing is a widely used rolling bearing in which tapered rollers are rolling elements. The final machining process for tapered rollers is typically through lapping, in which the tool is oilstone. In the tapered roller penetration type super lapping, the working surface of the oilstone refers to the surface of the oilstone which is in direct contact with the roller, and the surface is a curved surface in a stable working state. The curved surface shape of the working surface of the oilstone is different due to different specifications and models of the roller and different superfinishing processing modes, and the oilstone supplied by oilstone manufacturing enterprises has the characteristic of diversification, and the initial working surface of the oilstone is usually a plane and does not meet the superfinishing requirements of the roller. The shape of the oilstone working surface is an important factor influencing the superfinishing quality of the roller. Although the working surface of the oilstone can automatically change into a satisfactory shape as the oilstone wears away in use, the processing quality of the roller is affected before the shape is changed, and the consistency of the superfinishing quality of the roller is affected. Therefore, the precise preforming of the oilstone working surface before use is of great significance for the superfinishing of the precise tapered roller.
The shape of the oilstone working surface finally formed along with self abrasion in the tapered roller penetrating type superfinishing process is an ideal shape required by superfinishing, and the shape is not only related to the geometric dimension of the roller and the oilstone, but also related to the posture of the roller and the relative motion characteristic between the roller and the oilstone. The existing oilstone working surface preforming method and device do not fully consider the roller posture and the relative motion characteristics between the roller and the oilstone in the penetrating type superfinishing process of the tapered roller, the obtained oilstone working surface is low in shape precision, and the superfinishing requirement of the precise tapered roller is difficult to meet.
Disclosure of Invention
In view of the above, the present invention aims to provide a method and an apparatus for preforming a tapered roller super-precision oilstone working surface, which have high forming precision and are easy to operate.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for preforming a tapered roller super-precision oilstone working surface comprises the following steps:
step one, pretreatment: adjusting the posture of the tapered roller and the geometric relation between the tapered roller and the oilstone to ensure that the posture of the tapered roller is the same as the posture of the tapered roller in the penetrating type superfinishing and the geometric relation between the tapered roller and the oilstone;
the oilstone can do large-amplitude linear reciprocating motion relative to the tapered roller, and the motion direction of the oilstone is set to be the same as the penetrating motion direction of the tapered roller relative to the oilstone in the penetrating type superfinishing;
the geometric dimension of the tapered roller is the same as that of the tapered roller in the penetrating type superfinishing, or the radius of the tapered roller is smaller than that of the tapered roller in the penetrating type superfinishing by an abrasive belt thickness value, and the surface of the tapered roller is covered with an abrasive belt which is attached to the tapered surface of the tapered roller;
step two, forming: the abrasive belt abrasive particles grind the working surface of the oilstone into a required shape.
Furthermore, the tapered roller is arranged in a V-shaped groove of the V-shaped block, the V-shaped block is arranged on the double-inclined-plane cushion block, the double-inclined-plane cushion block is arranged on a horizontal plane and abuts against a longitudinal backup plate, so that the posture of the tapered roller is the same as the posture of the tapered roller in the through type superfinishing, the rear side face of the double-inclined-plane cushion block is tightly attached to the longitudinal backup plate, the upper surface and the rear side face of the double-inclined-plane cushion block are inclined planes, the inclined angle of the upper surface relative to the lower surface is used for adjusting the inclined angle of the axis of the tapered roller relative to the horizontal plane, and the inclined angle of the rear side face relative to the front side face is used for adjusting the inclined angle of the axis of the tapered roller relative to the longitudinal direction, so that the posture of the tapered roller is adjusted.
Furthermore, the double-inclined-plane cushion block is a hexahedron, the lower surface of the double-inclined-plane cushion block is a horizontal plane, the left side surface and the right side surface of the double-inclined-plane cushion block are transverse vertical surfaces, the front side surface of the double-inclined-plane cushion block is a longitudinal vertical surface, the upper surface and the rear side surface of the double-inclined-plane cushion block are inclined planes, the bottom surface of the V-shaped block is coplanar with the upper surface of the double-inclined-plane cushion block, and the front side surface of the V-shaped block is coplanar with the front side surface of the double-inclined-plane cushion block.
Furthermore, the front sides of the double-inclined-plane cushion block and the V-shaped block are provided with a front limiting block, and the left sides of the double-inclined-plane cushion block and the V-shaped block are provided with a left limiting block.
Furthermore, an abrasive belt covers the surface of the tapered roller, an abrasive belt clamping mechanism used for fixing the abrasive belt is arranged on the outer side of the abrasive belt, the abrasive belt and the roller conical surface are well attached through the abrasive belt clamping mechanism, and the wrap angle of the abrasive belt to the roller is larger than the wrap angle of the oilstone to the roller.
Furthermore, the oilstone is pressed on the abrasive belt on the surface of the roller from right above the tapered roller with a certain pressure, and the oilstone is reciprocated greatly along the longitudinal direction, and the moving direction of the oilstone is the same as the penetrating moving direction of the tapered roller relative to the oilstone in the penetrating type superfinishing.
The preforming device comprises a roller supporting assembly for supporting the tapered roller, a sand belt clamping assembly for covering and adhering the sand belt on the upper surface of the roller, and a oilstone pressurizing and moving device capable of pressing the oilstone on the sand belt on the surface of the roller from the right top and moving the oilstone in a reciprocating way along the longitudinal direction;
the roller supporting assembly comprises a bottom plate and a plurality of roller supporting mechanisms which are positioned above the bottom plate and are continuously arranged;
the roller supporting mechanism comprises a double-inclined-plane cushion block arranged above the bottom plate and a V-shaped block fixedly arranged at the top of the double-inclined-plane cushion block and used for supporting the tapered roller, a longitudinal backup plate is longitudinally arranged on one side of the bottom plate, the rear side face of the double-inclined-plane cushion block is tightly attached to the longitudinal backup plate, and the upper surface and the rear side face of the double-inclined-plane cushion block are inclined planes, wherein the inclination angle of the upper surface relative to the lower surface is used for adjusting a first tapered roller attitude parameter inclination angle, namely the inclination angle of the axis of the roller relative to the horizontal plane, and the inclination angle of the rear side face relative to the front side face is used for adjusting a second tapered roller attitude parameter inclination angle, namely the projection of the axis of the roller on the horizontal plane is relative to the longitudinal inclination angle, so that the attitude of the tapered roller can be adjusted.
Furthermore, a pressing backup plate is longitudinally arranged on one side of the bottom plate, which is opposite to the longitudinal backup plate, and a plurality of pressing bolts capable of pressing the rear side face of the double-inclined-plane cushion block on the longitudinal backup plate are in threaded connection with the pressing backup plate.
The oil stone pressurizing and moving device comprises a base plate, a front adjusting mechanism and a rear adjusting mechanism, wherein the base plate is arranged above the flat plate and is parallel to the flat plate;
the oilstone pressurizing and moving device can press the oilstone on the sand belt covering the upper surface of the roller at a certain pressure and reciprocate along the arrangement direction of the tapered roller.
Furthermore, the front-back adjusting mechanism comprises a front-back adjusting screw nut pair matched with the bottom plate and guide blocks arranged on the left side and the right side of the bottom plate.
Compared with the prior art, the invention has the beneficial effects that: the preformed shape of the oilstone working surface formed by the grinding of the preforming method has high precision, and the preforming device has low manufacturing cost and simple and convenient operation.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a tapered roller superfinishing oilstone working surface preforming device of the invention;
FIG. 2 is a schematic structural view of the roller support assembly;
figure 3 is a schematic view of the positional relationship of the belt clamping assembly and the roller support assembly;
FIG. 4 is a schematic diagram showing the roller attitude in the vertical plane and the positional relationship between the oilstone and the roller during the tapered roller penetration type superfinishing;
FIG. 5 is a schematic diagram of the roller attitude in the horizontal plane in the case of tapered roller penetration type superfinishing;
FIG. 6 is a schematic view of the line of contact between the tapered roller and the working surface of the oilstone;
FIG. 7 is a schematic view showing the shape of a working surface of an oilstone formed by linear sweep;
FIG. 8 is a schematic view of the geometry of the roller support assembly in the plumb plane;
fig. 9 is a sectional view taken along a-a of fig. 8.
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 described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
The principle of the invention is as follows: the ideal shape of the tapered roller penetrating type superfinishing oilstone working surface pre-forming is the shape which is naturally formed by abrasion of the oilstone during superfinishing, and the shape is not only related to the geometric dimensions of the roller and the oilstone, but also related to the posture of the roller and the relative motion characteristic between the roller and the oilstone. The attitude of the roller can be described by two parameters, one is an inclination angle which refers to an included angle of the axis of the roller relative to a horizontal line in a vertical plane in the longitudinal direction (the penetrating direction of the roller); the other is an oblique angle, which refers to the included angle of the roller axis in the horizontal plane relative to the roller penetrating direction. The relative motion characteristic between the roller and the oilstone during penetration type superfinishing is that the roller penetrates through the oilstone from the right lower part along the longitudinal direction in a certain posture while rotating, and the oilstone oscillates in a high frequency and small amplitude along the penetration direction of the roller. The principle that the working surface is formed by the natural abrasion of the oilstone during the penetration type superfinishing is that a roller-oilstone contact line performs linear sweeping in the roller penetration direction to form a sweeping surface on the oilstone.
The invention discloses a method for preforming a tapered roller super-precision oilstone working surface, which comprises the following steps of:
step one, pretreatment: the attitude of the tapered roller and the geometric relation between the tapered roller and the oilstone are the same as the attitude of the roller in the penetrating type superfinishing and the geometric relation between the tapered roller and the oilstone; the oilstone does large-amplitude linear reciprocating motion relative to the tapered roller, and the motion direction of the oilstone is the same as the penetrating motion direction of the tapered roller relative to the oilstone in the penetrating type superfinishing; the geometric dimension of the tapered roller is the same as that of the superfinished tapered roller, the radius of the tapered roller can also be smaller than that of the superfinished tapered roller by an abrasive belt thickness value, and the surface of the tapered roller is covered with an abrasive belt which is well attached to the tapered surface of the roller;
step two, forming: the oilstone is pressed on the surface of the abrasive belt under certain pressure to do the linear reciprocating motion, and the abrasive belt abrasive particles grind the shape of the oilstone working surface.
Therefore, the invention simulates the posture of the roller and the geometric relation and the relative motion relation between the roller and the oilstone in the penetrating type superfinishing, and is different only in that the roller does not rotate and the oilstone does not oscillate at high frequency and small amplitude but reciprocates at large amplitude. From the principle of forming the working surface of the oilstone, the rolling surface of the roller is an axisymmetric surface, and the roller-oilstone contact line is the same whether the roller rotates on the axis or not; the large reciprocating movement of the oilstone and the penetrating movement of the roller during superfinishing are the same sweeping straight line, so that the invention can ensure that the pre-forming ideal shape of the working surface of the oilstone is obtained.
The pre-forming method of the invention has the advantages of high pre-forming shape precision of the oilstone working surface, low manufacturing cost of the pre-forming device and simple and convenient operation.
The invention is suitable for the inclined penetrating type superfinishing of the tapered roller and the upright penetrating type superfinishing, and for the latter, the inclination angle of the rear side surface of the double-bevel cushion block relative to the front side surface is only required to be zero.
The preforming device mainly comprises a frame 01, a roller supporting and abrasive belt clamping device 02 and an oilstone pressurizing and moving device 03.
The main function of the frame 01 is to provide a mounting reference for the roller support and belt clamping device 02 and the oilstone pressing and moving device 03. Frame 01 includes riser 0101 and flat board 0103, and riser 0101 is used for installing oilstone fixture, and flat board 0103 is used for installing roller to support and abrasive band clamping device 02, and sets up perpendicularly between flat board 0103 and riser 0101.
The roller supporting and abrasive belt clamping device 02 comprises a roller supporting assembly and an abrasive belt clamping assembly, wherein the roller supporting assembly has the main function of ensuring that the posture of the roller is correct, the abrasive belt clamping assembly has the main function of ensuring that the abrasive belt is firmly attached to the conical surface of the roller, and the wrap angle of the abrasive belt to the roller is larger than the wrap angle of the oilstone to the roller.
Roller supporting component includes bottom plate 0201 and is located bottom plate top and a plurality of roller supporting mechanism that sets up in succession, and bottom plate 0201 sets up in dull and stereotyped 0103's top and with dull and stereotyped parallel arrangement, and wherein, the outside of bottom plate is provided with the front and back adjustment mechanism who is used for driving the bottom plate back-and-forth movement, and front and back adjustment mechanism includes the vice 0102 of adjusting screw nut and setting at the guide block 0104 of bottom plate left and right sides around with bottom plate matched with.
The roller supporting mechanism is composed of a tapered roller 0207, a V-shaped block 0206, a double-inclined-surface cushion block 0204, a left limiting block 0205, a front limiting block 0203, a longitudinal backup plate 0215, a compression bolt 0202, a bottom plate 0201 and a compression backup plate 0213, and as shown in fig. 2 and 3, the specific connection mode is as follows: the double-inclined-plane cushion block 0204 is arranged above the bottom plate 0201, the V-shaped block 0206 is fixedly arranged at the top of the double-inclined-plane cushion block and used for supporting the tapered roller 0207, a longitudinal backup plate 0215 is longitudinally arranged on one side of the bottom plate, the rear side face of the double-inclined-plane cushion block 0204 is tightly attached to the longitudinal backup plate 0215, and the upper surface and the rear side face of the double-inclined-plane cushion block 0204 are inclined planes, wherein the inclination angle of the upper surface relative to the lower surface is used for adjusting the inclination angle of the axis of the tapered roller relative to the horizontal plane, the angle is the inclination angle of one of attitude parameters of the tapered roller during super-precision, the inclination angle of the rear side face relative to the front side face is used for adjusting the inclination angle of the projection of the axis of the tapered roller on the horizontal plane relative to the longitudinal direction, and the angle is the inclination angle of the other attitude parameter of the tapered roller during super-precision, so that the attitude of the tapered roller can be adjusted.
Further, the abrasive belt clamping assembly provided by this embodiment is composed of a bottom plate 0201, a stud 0214, a support plate 0212, an upper clamp plate 0210, a lower clamp plate 0211, a fast clamp 0209, an abrasive belt 0208 and a tapered roller 0207, specifically, as shown in fig. 3, the abrasive belt is clamped by the abrasive belt clamping mechanism through the upper and lower clamp plates, and the abrasive belt is attached to the tapered surface of the roller by combining the adjustment of the vertical position of the press plate, and the wrap angle of the abrasive belt to the roller is larger than the wrap angle of the oilstone to the roller, and the abrasive belt is ensured to be stationary when the oilstone reciprocates on the surface of the abrasive belt at a certain pressure. It should be noted that the fixing of abrasive belt 0208 by quick clamp 0209, upper clamp plate 0210 and lower clamp plate 0211 is conventional for those skilled in the art, and it is not so much related to the adjustment of the attitude of the tapered roller by the core idea of the present application, and therefore, the structure thereof is not described in detail.
The oilstone pressurizing and moving device 03 comprises an oilstone clamping mechanism for clamping the oilstone, an oilstone pressurizing mechanism and a longitudinal moving mechanism for driving the oilstone clamping mechanism and the oilstone to reciprocate along the arrangement direction of the tapered roller; the main function of the oilstone pressing and moving device 03 is to ensure that the oilstone presses against the abrasive belt covering the upper surface of the roller with a certain pressure and can be moved to and fro in the longitudinal direction to a large extent.
Further, in fig. 1, belt 0208 covering the upper surface of the roller is drawn from a belt reel mounted on a belt wheel, belt 0208 is drawn only half width in view of graphic representation, and belt reel and belt wheel are not shown.
The principle of the invention for adjusting the posture of the tapered roller is as follows: the tapered roller 0207 is arranged in a V-shaped groove of the V-shaped block 0206, the V-shaped block 0206 is arranged on the double-inclined-surface cushion block 0204, and the double-inclined-surface cushion block 0204 is arranged on a horizontal plane and is abutted against a longitudinal vertical plane, namely a longitudinal backup plate 0215, so that the attitude of the tapered roller is ensured to be the same as that of the tapered roller in the through type superfinishing. Further, the double-inclined-surface cushion block 0204 is a hexahedron, the lower surface of the double-inclined-surface cushion block is a horizontal plane, the left side surface and the right side surface of the double-inclined-surface cushion block are transverse vertical surfaces, the front side surface is a longitudinal vertical surface, the upper surface and the rear side surface are inclined surfaces, the inclination angle of the upper surface relative to the lower surface can ensure that the inclination angle of the roller axis relative to the horizontal plane is equal to a first roller attitude parameter inclination angle when the roller is superfinished, and the inclination angle of the rear side surface relative to the front side surface is equal to another roller attitude parameter inclination angle when the roller is superfinished. The bottom surface of the V-shaped block 0206 is coplanar with the upper surface of the double-inclined-plane cushion block 0204, and the front side surface of the V-shaped block 0206 is coplanar with the front side surface of the double-inclined-plane cushion block 0204.
Furthermore, an abrasive belt 0208 covers the outer side of the upper surface of the tapered roller 0207, the abrasive belt 0208 is well attached to the tapered surface of the tapered roller 0207 through an abrasive belt clamping mechanism, and the wrap angle of the abrasive belt to the roller is larger than that of the oilstone to the roller.
The oilstone is pressed on the abrasive belt 0208 on the surface of the roller from right above the conical roller 0207 with certain pressure, and the oilstone is subjected to large-amplitude reciprocating movement along the longitudinal direction under the support of a longitudinal movement mechanism such as a guide rail, and the movement direction of the oilstone is the same as the penetration movement direction of the conical roller relative to the oilstone in the penetration type superfinishing.
As described above, the technical principle of the present invention is the ideal shape of the tapered roller penetrating type superfinishing oilstone working surface preforming, namely, the shape formed naturally by abrasion of the oilstone during superfinishing, and the shape is related to not only the geometric dimensions of the roller and the oilstone, but also the posture of the roller and the relative motion characteristic between the roller and the oilstone.
The following describes the operation of the tapered roller through superfinishing: the device adopts a pair of spiral guide rollers with horizontal and parallel axes to do fixed-axis homodromous rotation movement, and the roller-shaped surface at the bottom of the spiral groove is contacted with the conical surface of the roller to support, control the posture and rotationally drive the roller; the spiral flange of the front guide roller contacts with the spherical base surface of the roller to push the roller to penetrate forwards and isolate the adjacent rollers, so that the roller continuously fed between the two guide rollers by the feeding mechanism can rotate and penetrate along the axial direction of the guide roller in a certain posture; a row of rectangular oil stones are elastically pressed on the surface of the roller from the right above with a certain pressure, and perform high-frequency small-amplitude linear oscillation along the linear direction of the roller penetration to perform superfinishing processing on the roller conical surface.
In the case of the tapered roller penetration type superfinishing, the roller attitude and the positional relationship between the whetstone and the roller in the vertical plane are shown in fig. 4, in which: 1-rear guide roller, 2-tapered roller, 3-oilstone, 5-roller through straight line and 6-rear guide roller axis;
the roller attitude in the horizontal plane is shown in FIG. 5, in which 1-rear guide roller, 2-tapered roller, 4-front guide roller, 5-roller through straight line, 6-rear guide roller axis, 7-front guide roller axis; the attitude of the roller can be described by two parameters, one is the inclination angle, which is the included angle of the roller axis relative to the horizontal line in the vertical plane in the longitudinal direction (the roller penetrating direction), namely the angle theta in figure 4; the other is the oblique angle, which refers to the angle of the roller axis in the horizontal plane relative to the roller penetration direction, i.e. the angle phi in fig. 5.
In the case of the tapered roller penetration type superfinishing, the oilstone is worn away while the surface material of the roller is removed, and the working surface shape of the oilstone is not obtained by dressing but naturally formed by self-wearing. Oilstones wear faster with a wear rate comparable to the removal rate of the roller material. The principle that the working surface is formed by natural abrasion of the oilstone is that a roller-oilstone contact line performs linear sweeping in the penetrating direction of the roller to form a sweeping surface on the oilstone. FIG. 6 is a schematic diagram of the roller-oilstone contact line, where 3-oilstone, 8-roller, contact line with the oilstone working surface, 2-tapered roller. FIG. 7 is a schematic view showing the shape of the working surface of the whetstone formed by linear sweep, in which 9-the working surface of the whetstone formed by linear sweep.
The device can ensure that the posture of the tapered roller is the same as that of the penetrating type superfinishing. Fig. 8 is a schematic view of the geometry of the roller support assembly in the horizontal plane, and fig. 9 is a schematic view of the geometry of the roller support assembly at section a-a of fig. 8. As shown in FIGS. 8 and 9, the tapered rollers 0207 placed in the V-shaped blocks 0206 have their axes parallel to the front side surfaces of the V-shaped blocks and have an inclination angle with the bottom surfaces of the V-shaped blocks 0206
(ii) a The V-shaped block is arranged on the double-inclined-surface cushion block 0204 and is fixedly connected with the double-inclined-surface cushion block 0204 through a screw, the bottom surface of the V-shaped block is coplanar with the upper surface of the double-inclined-surface cushion block 0204, and the front side surface of the V-shaped block is coplanar with the front side surface of the cushion block by means of the front limiting block 0203; the upper surface of the double-inclined-surface cushion block 0204 is an inclined surface, and the inclined angle of the upper surface relative to the bottom surface is
The angle being dependent on the angle of inclination
Selecting to ensure that the inclination angle of the axis of the roller relative to the bottom surface of the double-inclined-plane cushion block 0204 is equal to the first roller attitude parameter inclination angle theta when the roller is superfinished; the back side of the double-inclined-surface cushion block 0204 is an inclined surface, the inclination angle of the inclined surface relative to the front side surface is equal to another roller attitude parameter inclination angle phi, and the inclined surface is abutted against the longitudinal backup plate 0215 and is located in a longitudinal vertical plane, so that the inclination angle of the roller axis relative to the longitudinal vertical plane is equal to the roller attitude parameter inclination angle phi.
Given a first roller attitude parameter tilt angle theta and a roller half cone angle alpha, and selecting a V-shaped block of 90 DEG, the tilt angle is
The calculation formula of (A) is as follows:
angle of inclination
The calculation formula of (A) is as follows:
furthermore, the device of the invention can ensure that the geometric relation between the tapered roller and the oilstone is the same as that during penetrating type superfinishing, the abrasive belt and the roller conical surface are firmly attached, the wrap angle of the abrasive belt to the roller is larger than that of the oilstone to the roller, and the oilstone is pressed on the surface of the abrasive belt from right above and the relative motion between the oilstone and the roller meets the motion requirement of precise preforming of the oilstone working surface. As shown in fig. 1, 2 and 3, the front-back position of the tapered roller with respect to the oilstone can be made the same as that in the through-type superfinishing by adjusting the front-back position of the bottom plate 0201 on the flat plate 0103 by adjusting the front-back position of the lead screw nut pair 0102 and the guide block 0104; the height of the support plate 0212 on the stud 0214 is adjusted, and the abrasive belt is clamped by the quick clamp 0209, so that the abrasive belt can be firmly attached to the upper surface of the roller, and the wrap angle of the abrasive belt is larger than that of the oilstone to the roller. The oilstone pressurizing and moving device 03 can press the oilstone on the surface of the abrasive belt from right above and guide the oilstone to perform longitudinal reciprocating movement in a vertical plane, so that the relative movement between the oilstone and the roller can meet the movement requirement of precise pre-forming of the working surface of the oilstone.
The using method of the device comprises the following steps: and putting the oilstone into the oilstone clamping mechanism, pressing the oilstone on a sand belt covering the upper surface of the tapered roller through the oilstone clamping mechanism, driving the oilstone clamping mechanism and the oilstone to longitudinally reciprocate in a vertical plane through a longitudinal moving mechanism, realizing pre-forming grinding, and unloading the oilstone after the grinding is finished.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for preforming a tapered roller super-precision oilstone working surface is characterized by comprising the following steps:
step one, pretreatment: adjusting the posture of the tapered roller and the geometric relation between the tapered roller and the oilstone to ensure that the posture of the tapered roller is the same as the posture of the tapered roller in the penetrating type superfinishing and the geometric relation between the tapered roller and the oilstone;
the oilstone can do large-amplitude linear reciprocating motion relative to the tapered roller, and the motion direction of the oilstone is set to be the same as the penetrating motion direction of the tapered roller relative to the oilstone in the penetrating type superfinishing;
the geometric dimension of the tapered roller is the same as that of the tapered roller in the penetrating type superfinishing, or the radius of the tapered roller is smaller than that of the tapered roller in the penetrating type superfinishing by an abrasive belt thickness value, and the surface of the tapered roller is covered with an abrasive belt which is attached to the tapered surface of the tapered roller;
step two, forming: the abrasive belt abrasive particles grind the working surface of the oilstone into a required shape.
2. The preforming method according to claim 1, characterized in that: the tapered roller is arranged in a V-shaped groove of the V-shaped block, the V-shaped block is arranged on the double-inclined-plane cushion block, the double-inclined-plane cushion block is arranged on a horizontal plane and abuts against a longitudinal backup plate, so that the posture of the tapered roller is the same as the posture of the tapered roller in the through type superfinishing, the rear side face of the double-inclined-plane cushion block is tightly attached to the longitudinal backup plate, the upper surface and the rear side face of the double-inclined-plane cushion block are inclined planes, the inclined angle of the upper surface relative to the lower surface is used for adjusting the inclined angle of the axis of the tapered roller relative to the horizontal plane, and the inclined angle of the rear side face relative to the front side face is used for adjusting the inclined angle of the axis of the tapered roller relative to the longitudinal direction, so that the posture of the tapered roller is adjusted.
3. The preforming method according to claim 2, characterized in that: the double-inclined-plane cushion block is a hexahedron, the lower surface of the double-inclined-plane cushion block is a horizontal plane, the left side surface and the right side surface of the double-inclined-plane cushion block are transverse vertical surfaces, the front side surface of the double-inclined-plane cushion block is a longitudinal vertical surface, the upper surface and the rear side surface of the double-inclined-plane cushion block are inclined planes, the bottom surface of the V-shaped block is coplanar with the upper surface of the double-inclined-plane cushion block, and the front side surface of the V-shaped block is coplanar with the front side surface of the double-inclined-plane cushion block.
4. The preforming method according to claim 3, characterized in that: the front limiting blocks are arranged in front of the double-inclined-plane cushion block and the V-shaped block, and the left limiting blocks are arranged on the left sides of the double-inclined-plane cushion block and the V-shaped block.
5. The preforming method according to claim 2, characterized in that: the abrasive belt is covered on the surface of the tapered roller, an abrasive belt clamping mechanism used for fixing the abrasive belt is arranged on the outer side of the abrasive belt, the abrasive belt and the roller conical surface are well attached through the abrasive belt clamping mechanism, and the wrap angle of the abrasive belt to the roller is larger than the wrap angle of the oilstone to the roller.
6. The preforming method according to claim 5, characterized in that: the oilstone is pressed on the abrasive belt on the surface of the roller from right above the tapered roller with certain pressure, and the oilstone reciprocates greatly along the longitudinal direction, and the moving direction is the same as the penetrating moving direction of the tapered roller relative to the oilstone in the penetrating type superfinishing.
7. Preforming device for performing the preforming method according to any of claims 1 to 6, wherein the preforming device comprises a roller supporting member for supporting the tapered roller, a belt holding member for covering and applying a belt to the upper surface of the roller, and a oilstone pressing and moving device for pressing oilstone on the belt on the surface of the roller from right above and reciprocating the oilstone in the longitudinal direction;
the roller supporting assembly comprises a bottom plate and a plurality of roller supporting mechanisms which are positioned above the bottom plate and are continuously arranged;
the roller supporting mechanism comprises a double-inclined-plane cushion block arranged above the bottom plate and a V-shaped block fixedly arranged at the top of the double-inclined-plane cushion block and used for supporting the tapered roller, a longitudinal backup plate is longitudinally arranged on one side of the bottom plate, the rear side face of the double-inclined-plane cushion block is tightly attached to the longitudinal backup plate, and the upper surface and the rear side face of the double-inclined-plane cushion block are inclined planes, wherein the inclination angle of the upper surface relative to the lower surface is used for adjusting a first tapered roller attitude parameter inclination angle, namely the inclination angle of the axis of the roller relative to the horizontal plane, and the inclination angle of the rear side face relative to the front side face is used for adjusting a second tapered roller attitude parameter inclination angle, namely the projection of the axis of the roller on the horizontal plane is relative to the longitudinal inclination angle, so that the attitude of the tapered roller can be adjusted.
8. The preforming device according to claim 7, wherein: and a pressing backup plate is longitudinally arranged on one side of the bottom plate, which is opposite to the longitudinal backup plate, and a plurality of pressing bolts capable of pressing the rear side surface of the double-inclined-surface cushion block on the longitudinal backup plate are in threaded connection with the pressing backup plate.
9. The preforming device according to claim 8, wherein: the oil stone pressurizing and moving device comprises a base plate, a front adjusting mechanism and a rear adjusting mechanism, wherein the base plate is arranged above the flat plate and is parallel to the flat plate;
the oilstone pressurizing and moving device can press the oilstone on the sand belt covering the upper surface of the roller at a certain pressure and reciprocate along the arrangement direction of the tapered roller.
10. The preforming device according to claim 9, wherein: the front-back adjusting mechanism comprises a front-back adjusting lead screw nut pair matched with the bottom plate and guide blocks arranged on the left side and the right side of the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523535.3A CN114131521A (en) | 2021-12-14 | 2021-12-14 | Method and device for preforming superfine oilstone working surface of tapered roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523535.3A CN114131521A (en) | 2021-12-14 | 2021-12-14 | Method and device for preforming superfine oilstone working surface of tapered roller |
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| Publication Number | Publication Date |
|---|---|
| CN114131521A true CN114131521A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111523535.3A Withdrawn CN114131521A (en) | 2021-12-14 | 2021-12-14 | Method and device for preforming superfine oilstone working surface of tapered roller |
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| CN (1) | CN114131521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113385898A (en) * | 2021-06-23 | 2021-09-14 | 江苏力星通用钢球股份有限公司 | Process for machining logarithmic curve roller of high-speed rail bearing |
-
2021
- 2021-12-14 CN CN202111523535.3A patent/CN114131521A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113385898A (en) * | 2021-06-23 | 2021-09-14 | 江苏力星通用钢球股份有限公司 | Process for machining logarithmic curve roller of high-speed rail bearing |
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