Double-disc straight groove cylindrical-component surface grinding disc

Abstract

A double-disc straight groove cylindrical-component surface grinding disc, includes a first grinding disc and a second grinding disc, rotating relative to each other; the the first grinding disc's working face is planar; the second grinding disc's surface, opposite the first grinding disc, includes a set of radial straight grooves, with groove faces of the straight grooves are the working face of the second grinding disc; the cross-sectional outline of the working face of the second grinding disc is arcuate or V-shaped or is a V-shape having an arc; during grinding, a workpiece spins inside the straight grooves, while under the effect of an advancing apparatus, the workpiece slides in translational motion along the straight grooves. The described grinding disc device has high-volume production capabilities, and the shape accuracy and size consistency of the cylindrical roller's cylindrical surface and the efficiency in machining are improved, and machining cost is reduced.

Claims

1. A double-disc straight groove cylindrical-component surface grinding disc, comprising a first grinding disc (11) and a second grinding disc (12); wherein: the second grinding disc (12) and the first grinding disc (11) rotates relative to each other, the second grinding disc (12) having a rotation, axis OO relative to the first grinding disc (11); a surface of the first grinding disc 11, opposite to the second grinding disc (12) is planar, which is a working surface (111) of the first grinding disc (11); and a plurality of radial straight grooves (121) are provided on a surface of the second grinding disc (12) opposite to the first grinding disc (11), the straight groove (121) having a groove surface as a working face (1211) of the second grinding disc (12), the working face (1211) of the second grinding disc (12) having a cross-section profile in an arc shape or a V shape or a V shape with an arc; during grinding process, a processing workpiece (9) is arranged in the straight, groove (121) along a groove extending direction, and meanwhile, an outer cylindrical surface of the processing workpiece (9) contacts with the working face (1211) of the second grinding disc (12); the straight groove (121) has a reference plane, a plane that passes through an axis l of the processing workpiece arranged in the straight groove, and is perpendicular to the working face (111) of the first grinding disc (11); there is an angle between a normal plane at a contacting point or a midpoint of a contacting arc between the processing workpiece (9) and the straight groove (121), and the reference plane of the straight groove (121), the angle ranging in 3060 ; one end of the straight groove (121) close to a center of the second grinding disc (12) is a propulsion port, and the other end of the straight groove (121) is a discharge outlet; an eccentric distance e exists between the reference plane of the straight groove (121) and the rotation axis OO, and the value of e is larger than or equal to zero, and smaller than a distance from the rotation axis OO to the discharge outlet of the straight groove (121); when the value of the eccentric distance e is zero, the straight groove (121) is arranged in a radial arrangement; and the second grinding disc (12) has a central position with a mounting portion of the workpiece advancing, apparatus (2) provided thereon; under a condition of a grinding pressure and grinding lubrication, a friction coefficient between materials of the first grinding disc's working face (111) and materials of the processing workpiece is f1, a friction coefficient between materials of the second grinding disc's working face (1211) and materials, of the processing workpiece is f2, and f1>f2, so as to ensure the processing workpiece to achieve spinning in the grinding process.

2. The double-disc straight groove cylindrical-component surface grinding disc as described in claim 1, wherein, the second grinding disc 12 has a central position provided with a mounting portion of the workpiece advancing apparatus.

3. The double-disc straight groove cylindrical-component surface grinding disc as described in claim 1, wherein, a grinding disc loading apparatus and a power system are included.

Description

DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view of an excircle surface super-finishing device for a double-disc straight groove cylindrical component;

(2) FIG. 2 is a schematic view of a grinding disc apparatus;

(3) FIG. 3 is a schematic view of second grinding disc having a straight groove;

(4) FIG. 4(a) (b) and (c) are cross, section views of a workpiece to be processed in the grinding disc apparatus, wherein: FIG. 4(a) illustrates a V-shaped cross-section profile of a working face of the straight groove of the second grinding disc; FIG. 4(b) illustrates an arc-shaped cross-section profile of the working face of the straight groove of the second grinding disc; and FIG. 4(c) illustrates a cross-section profile of a working face the second grinding disc in a V shape with an arc;

(5) In the figures;

(6) reference sign 1 indicates a grinding disc apparatus; reference sign 2 indicates a workpiece advancing apparatus;

(7) reference sign 3 indicates a workpiece conveying apparatus; reference sign 4 indicates a workpiece mixing apparatus;

(8) reference sign 5 indicates a workpiece and grinding fluid separation apparatus; reference sign 6 indicates a workpiece cleaning apparatus;

(9) reference sign 7 indicates a loading apparatus; reference sign 8 indicates a power system;

(10) reference sign 9 indicates a processing workpiece; reference sign 11 indicates a first grinding disc;

(11) reference sign 111 indicates the first grinding disc's working face;

(12) reference sign 12 indicates a second grinding disc;

(13) reference sign OO indicates a rotation axis of the second grinding disc relative to the first grinding disc; reference sign 121 indicates a straight groove;

(14) reference sign 1211 indicates the second grinding disc's working face; reference sign 1212 indicates art escrape at the bottom of the straight groove of the second grinding disc;

(15) Reference sign l indicates the axis of the processing workpiece in the straight groove;

(16) Reference sign indicates the relative rotational speed of the second grinding disc and the first grinding disc;

(17) reference sign .sub.1 indicates the spin angular velocity of processing workpiece under the processing;

(18) reference sign indicates a plane passing through the axis l and perpendicular to the working face of the first grinding disc;

(19) reference sign indicates a normal plane at an unique contacting point or a midpoint A of a contacting arc between the processing workpiece and the straight groove;

(20) reference sign indicates an angle between plane and plane ;

(21) reference sign e indicates an eccentric distance from the plane to the second grinding disc's rotational axis OO relative to the first grinding disc;

(22) reference sign r indicates an excircle radius of the processing workpiece.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(23) The technical solution of the present invention will now be described in further detail with reference to the accompanying drawings and specific examples.

(24) As shown in FIG. 2, a double-disc straight groove cylindrical-component surface grinding disc of the invention, includes a first grinding disc 11 and a second grinding disc 12, and the second grinding disc 12 and the first grinding disc 11 rotate relative to each other. The second grinding disc 12 has a rotation axis OO relative to the first grinding disc 11, a surface of the first grinding disc 11, opposite to the second grinding disc 12, is planar, which is a working surface 111 of the first grinding disc 11. As shown in FIG. 3, a plurality of radial straight grooves 121 are provided on a surface of the second grinding disc 12 opposite to the first grinding disc 11, and a groove surface of the straight groove 121 is a working surface 1211 of the second grinding disc 12. As shown in FIG. 4, the working face 1211 of the second grinding disc 12 has a cross-section profile in an arc shape or a V shape or a V shape with an arc. Herein, the cross-section profile of the working face 1211 of the second grinding disc 12 shown in FIG. 4-(a) is V-shaped, the cross-section profile of the work surface 1211 of the second grinding disc 12 shown in FIG. 4-(b) is in an arc shape, and the cross-section profile of the working face 1211 of the second grinding disc 12 as shown in FIG. 4-(c) is a V shape with an arc. The bottom of the straight groove is provided with an escrape 1212. Processing workpieces 9 are laterally disposed on the straight groove 121, to be processed in a grinding working area consisting of the working face 111 of the first grinding disc 11 and the working face 1211 of the second grinding disc 12. Under load conditions and lubrication conditions of the grinding fluid, the friction pair formed by the material of the working face 111 of the first grinding disc 11 and the material of the processing workpiece 9 has a friction coefficient f1 larger than a friction coefficient f2 of the friction pair formed by the material of the working face 1211 of the second grinding disc 12 and the material of the processing workpiece 9 under the same conditions.

(25) During grinding process, the processing workpiece 9 is arranged in the straight groove 121 along a groove extending direction, meanwhile, an outer cylindrical surface of the processing workpiece 9 contacts with the working face 1211 of the second grinding disc 12, and the working face 1211 of the straight groove 121 locates the position of the excircle surface of the workpiece 9. The straight groove 121 has a reference plane , a plane that passes through an axis l of the processing workpiece arranged in the straight groove, and is perpendicular to the working face 111 of the first grinding disc 11. There is an angle between a normal plane at a contacting point or a midpoint A of a contacting arc between the processing workpiece 9 and the straight groove 121, and the reference plane of the straight groove 121. The angle ranges in 3060. One end of the straight groove 121 close to the center of the second grinding disc 12 is a propulsion port of the processing workpiece, and the other end of the straight groove 121 is a discharge outlet An eccentric distance e exists between the reference plane of the straight groove 121 and the second grinding disc's rotation axis OO relative to the first grinding disc. The value of e is larger than or equal to zero, and smaller than a distance from the rotation axis OO to the discharge outlet of the straight groove 121. When the value of the eccentric distance e is zero, the straight groove 121 is actually arranged in a radial arrangement, and the second grinding disc 12 has a mounting portion of the workpiece advancing apparatus 2, provided at a central position thereof.

(26) Under the conditions of the grinding pressure and grinding lubrication, the friction coefficient between the material of the first grinding discs working face 111 and the material of the processing workpiece is f1, and the friction coefficient between the material of the second grinding disc's working face 1211 and the material of the processing workpiece is f2, and f1>f2, so as to ensure that the processing workpiece may achieve spinning in the grinding process.

(27) As shown in FIG. 1, a cylindrical-component grinding device with the double-disc straight groove cylindrical-component surface grinding disc of the invention arranged therein, includes a loading apparatus 7, a power system 8, and a workpiece advancing apparatus 2, a grinding, disc apparatus 1, a workpiece and grinding fluid separating apparatus 5, a workpiece cleaning apparatus 6 and workpiece mixing apparatus 4, the later five apparatuses connecting with a workpiece conveying apparatus 3 in sequence. The loading apparatus 7 is configured for material loading of the grinding disc apparatus 1, and the power system 8 is configured for driving the grinding disc apparatus 1. Herein, the workpiece conveying apparatus 3 may employ a common vibration feeding mechanism and a screw feeding mechanism on the market, which function to realize a continuous feeding of the processing workpiece 9. The workpiece mixing apparatus 4 according to the present invention adopts a common cylindrical workpiece mixing mechanism on the market, for achieving disordering the sequence of the workplace and improving the randomness of the processing. The workpiece and grinding fluid separating apparatus 5 of the present invention is provided with a precipitation tank, a grinding fluid delivery pipe and a grinding fluid separation apparatus, for conveying the grinding fluid to the device, collecting the used grinding fluid, and for separating the grinding debris and grinding fluid after precipitation and filtration, thus to achieve a recycling of grinding fluid. The workpiece cleaning apparatus 6 of the present invention employs a common workpiece cleaning apparatus on the market, for cleaning the primarily grinded workplace with a cleaning liquid and for recovering the cleaning liquid. In order to prevent environment pollution, the wastewater produced by cleaning of rollers firstly flows into the precipitation tank to precipitate through the pipe, and precipitated waste water enters the grinding fluid separation apparatus for a centrifugal separation and filtration. Separated cleaning liquid then returns to the roller cleaning apparatus and gets a reuse.

(28) To realize grinding on cylindrical components by virtue of the cylindrical-component grinding device of the present invention, following steps are included.

(29) Step 1 is workpiece feeding. Herein, the workpiece conveying apparatus 3 feeds the processing workplace into a material storage hopper of the workplace advancing apparatus 2, and under the drive of an intermittent reciprocating mechanism, a push rod pushes the processing workplace 9 in the material storage hopper from the bottom of the material storage hopper to the straight groove 121, until all the straight grooves are fulfilled with the processing workplace 9.

(30) Step 2 is grinding processing. Herein, the loading apparatus 7 provides loading for the grinding disc apparatus 1, the workpiece 9 contacts with the first grinding disc's working face 111 and the second grinding disc's working face 1211; the power system 8 drives the grinding disc apparatus 1, the second grinding disc 12 rotates relative to the first grinding disc 11, the processing workpiece 9 is processed in the grinding working area formed by the working face 111 of the first grinding disc 11 and the working face 1211 of the second grinding disc 12. Under the conditions of the grinding pressure and grinding lubrication, the friction coefficient f1 between the material of the first grinding disc's working face 111 and the material of the processing workpiece is larger than the friction coefficient f2 between the material of the second grinding disc's working face 1211 and the material of the processing workpiece, so with the joint cooperation of the first grinding disc 11 and the second grinding disc 12, the processing workpiece may spinning along its axis, and at the same time, the advancing apparatus 2 keeps pushing the processing workpiece 9 into the straight groove 121. Pushed by following processing workpieces 9, the processing workpiece 9 in the straight groove 121 performs translational slide motion from the propulsion port of the straight groove 121 towards the discharge outlet. During the above-described motion, the contacting region between the working face of the grinding disk apparatus 1 and an outer cylindrical surface of the processing workpiece 9, under the effect of free grinding particles in the grinding fluid, may realize a micro material removal of the processing workpiece 9, until the processing workpiece 9 has been discharged from the discharge outlet of the straight groove 121.

(31) During the grinding process, plenty of processing workpieces 9 distributed in the plurality of straight grooves 121 at the same time are simultaneously engaged in the grinding process, and the combination of the processing workpieces 9 at the same time is highly random, the load endured by the processing workpiece 9 with a larger diameter is greater than that of the processing workpiece 9 with a smaller diameter, thus facilitating a large material removal on excircle surfaces of the processing workpiece 9 in a larger diameter, as well as small material removal on excircle surfaces of the processing workpiece 9 in a smaller diameter, further to improve the processing efficiency, and dimensional accuracy and consistency of encircle surfaces of the processing workpiece 9.

(32) Step 3 is workpiece cleaning. Herein, the workpiece and grinding fluid separating apparatus 5 separates the workpiece graded in step 2 from the grinding fluid, and after filtration and precipitation, the grinding fluid is then in reuse. After the workpiece is cleaned by the workpiece cleaning apparatus 6, the process goes on to step 4.

(33) Step 4 is that after the workpieces have been disordered by the workpiece mixing apparatus 4, the process goes back to step 1;

(34) After a period of continuous cycle grinding processing, a sampling inspection of the workpiece is made, and if the result meets the process requirements, the grinding processing ends, or otherwise, the grinding processing continues.

(35) By virtue of the present invention, it is achieved that plenty of the processing workpieces 9 distributed in the straight groove 121 at the same time are engaged in the grinding process, and the combination of the processing workpieces 9 at the same time is highly random, the load endured by the processing workpiece 9 with a larger diameter is greater than that of the processing workpiece 9 with a smaller diameter, thus facilitating a large material removal on cylindrical surfaces of the processing workpiece 9 in a larger diameter, as well as a small material removal on cylindrical surfaces of the processing workpiece 9 in a smaller diameter, further to improve the dimensional consistency of cylindrical surfaces of the processing workpiece 9. A large removal of the material at a high position and a larger material removal of the processing workpiece 9 in a larger diameter, contribute to the improvement of processing efficiency on cylindrical surface of the processing workpiece 9.

(36) Though the invention has been described above with reference to the accompanying drawings, the invention shall not be limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and for one of ordinary skill in the art, under the inspiration of the present invention, many modifications may be made without departing from the spirit of the invention, which shall fall into the protection scope of the present invention.