Copper Disc for Sapphire Polishing, and Method of Repairing Double-Face Copper Disc

Abstract

A disc containing copper for sapphire polishing; the annular surface of the disc is provided with a spiral grinding groove or concentric circular grinding grooves thereon; and stepped grooves are provided at the edges along both the outer ring and inner ring of the annular surface of the disc. Also provided is a method of repairing a discs containing copper facing each other for sapphire polishing, comprising: first step, horizontally and transversely moving an upper disc and a lower disc turning tool, or a lower disc and an upper disc turning tool, and aligning the turning tool with the original position of the grinding groove on the corresponding disc; second step, controlling the upper disc and the lower disc to rotate in opposite directions at the same rotation speed and with the turning tools fixed, controlling the upper disc or the lower disc to be fed transversely, and turning a corresponding grinding groove via the turning tools; third step, removing the turning tools and washing the surface of the corresponding discs.

Claims

1. A disc containing copper for polishing sapphire, wherein an annular surface of the disc containing copper is provided with a spiral grinding groove or concentric circular grinding grooves thereon, and stepped grooves are provided at edges along both an outer ring and an inner ring of the annular surface of the disc containing copper.

2. The disc containing copper for polishing sapphire according to claim 1, wherein a width in a radial direction of the stepped groove along the outer ring of the annular surface of the disc containing copper is no less than a minimal distance from an edge of a mold cavity of a planetary gear placed on the disc containing copper to an edge of the outer ring of the disc containing copper; and a width in a radial direction of the stepped groove along the inner ring of the annular surface of the disc containing copper is no less than a minimal distance from the edge of the mold cavity of the planetary gear placed on the disc containing copper to an edge of the inner ring of the disc containing copper.

3. The disc containing copper for polishing sapphire according to claim 2, wherein the grinding groove has a depth of 0.25-0.35 mm, and a spacing between adjacent turns of the grinding groove or adjacent grinding grooves is 1.2-1.4 mm.

4. The disc containing copper for polishing sapphire according to claim 3, wherein the disc containing copper is a disc composed of copper and resin.

5. The disc containing copper for polishing sapphire according to claim 1, wherein the spiral grinding groove is a single continuous groove.

6. The disc containing copper for polishing sapphire according to claim 1, wherein the stepped groove has a depth of 0.25-0.4 mm and a radial width of 8-12 mm.

7. A method for repairing discs containing copper facing each other for polishing sapphire, wherein the discs containing copper are used in a polishing machine with two discs containing copper facing each other, the discs containing copper including an upper and a lower disc, and wherein a lower disc turning tool for repairing the lower disc is fixed to a position on one side of the upper disc, and an upper disc turning tool for repairing the upper disc is fixed to a position on a side of the lower disc opposing to the one side of the upper disc, the method comprising: a first step of moving horizontally and transversally the upper disc and the lower disc turning tool, or the lower disc and the upper disc turning tool, so as to align the upper disc turning tool with the original position of a grinding groove on the upper disc and to align the lower disc turning tool with the original position of a grinding groove on the lower disc; a second step of controlling the upper disc and the lower disc to rotate in opposite directions at the same rotation speed and with the turning tools fixed, controlling the upper disc or the lower disc to be fed transversely, and cutting corresponding grinding grooves by the turning tools; and a third step of removing the turning tools and washing the surface of the discs containing copper.

8. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 7, wherein the grinding groove is a spiral groove, and the upper or lower disc is controlled to be transversely fed continually in the second step.

9. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 7, wherein the grinding groove has concentric circular grinding grooves, the upper or lower disc is controlled to be transversely fed quantitatively at multiple times according to the spacing between the grinding grooves in the second step.

10. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 8, wherein the lower disc and the upper disc turning tool are provided on a transverse guide rail on the polishing machine with two discs containing copper facing each other, and are driven by a motor to be fed transversely.

11. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 10, wherein a horizontal distance from the lower disc turning tool to an edge of the upper disc equals to a horizontal distance from the upper disc turning tool to an edge of the lower disc, and a vertical distance from a tip of the upper disc turning tool to the upper disc equals to a vertical distance from a tip of the lower disc turning tool to the lower disc.

12. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 7, wherein each disc of the discs containing copper facing each other is the disc containing copper for polishing sapphire according to claim 1.

13. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 12, wherein the stepped groove is processed or finished by a corresponding turning tool with the same method as the grinding groove is processed or finished.

14. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 9, wherein the lower disc and the upper disc turning tool are provided on a transverse guide rail on the polishing machine with two discs containing copper facing each other, and are driven by a motor to be fed transversely.

15. The method for repairing discs containing copper facing each other for polishing sapphire according to claim 14, wherein a horizontal distance from the lower disc turning tool to an edge of the upper disc equals to a horizontal distance from the upper disc turning tool to an edge of the lower disc, and a vertical distance from a tip of the upper disc turning tool to the upper disc equals to a vertical distance from a tip of the lower disc turning tool to the lower disc.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a schematic diagram for the polishing using a disc containing copper of the prior art.

[0026] FIG. 2 is a top view of the disc containing copper for polishing sapphire in the present disclosure.

[0027] FIG. 3 is a front sectional view of the disc containing copper for polishing sapphire in the present disclosure.

[0028] FIG. 4 is an enlarged view of the part indicated by A in FIG. 3.

[0029] FIG. 5 is a schematic diagram of a polishing machine with two discs containing copper facing each other using the method for repairing discs containing copper facing each other of the present disclosure.

[0030] FIG. 6 is a schematic diagram of a step of the prior art.

[0031] FIG. 7 is a schematic diagram of the grinding groove of the present disclosure.

[0032] FIG. 8 is a schematic diagram of the stepped groove of the present disclosure. FIG. 8(a) and FIG. 8(b) illustrate a stepped groove having one step. FIG. 8(c) and FIG. 8(d) illustrate a stepped groove having two steps.

[0033] Reference signs in the drawings: 1disc containing copper; 2inner gear ring; 3planetary gear; 4sun gear; 5mold cavity; 6transverse guide rail; 7lower disc turning tool; 8suspension arm; 9upper disc turning tool; 11grinding groove; 12stepped groove.

EXAMPLES

[0034] The present application will be specifically described with the following examples. But the present application is not limited to the following examples.

Example 1

[0035] Referring to FIGS. 2-4, a spiral grinding groove 11 is provided on the annular surface of the disc containing copper 1; a stepped groove 12 is provided along the edges of the annular outer and inner rings of the disc containing copper 1, respectively. A groove bottom surface of the stepped groove 12 is lower than the annular surface of the disc containing copper 1. FIG. 3 is a front sectional view of the disc containing copper for polishing sapphire in the present disclosure. FIG. 4 is an enlarged view of the part indicated by A in FIG. 3. However, a cross-sectional shape of the grinding groove in FIG. 3 is different from that in FIG. 4. In FIG. 3, the cross-sectional shape of the grinding groove is a rectangular shape while in FIG. 4, the cross-sectional shape of the grinding groove is a triangle. In addition, the stepped grooves along the edges of the inner and outer rings of the annular surface of the disc containing copper are both two-stepped grooves as shown in FIGS. 3 and 4. However, a person skilled in the art knows that the stepped groove may be a one-stepped groove or a multi-stepped groove.

[0036] Moreover, the grinding groove 11 can also use a concentric circular configuration, and be processed by cutting. The grinding groove 11 has a depth of 0.25-0.35 mm, and the spacing between the adjacent grinding grooves is 1.2-1.4 mm (FIG. 2 accentuates the spiral shape and is merely a schematic diagram, and does not illustrate the requirement for the size).

[0037] In specific, referring to the positional relationship with the planetary gear in FIG. 1, the outer stepped groove 12 should have a radial width that is no less than a minimal distance from the edge of the mold cavity of the planetary gear placed on the disc containing copper 1 to an outer edge of the annular disc containing copper; and a radial width of the inner stepped groove 12 should be no less than a minimal distance from the edge of the mold cavity of the planetary gear placed on the disc containing copper to an inner edge of the annular disc containing copper, so as to ensure that the whole area of the grinding grooves on the disc containing copper is the normal grinding area and to achieve even wear of the disc containing copper. Moreover, during the grinding and polishing process, the edges and corners of the sapphire panel will be circulated by the rotation of the planetary gear to enter the area of the disc containing copper provided with the grinding grooves so as to be grinded.

[0038] The disc containing copper 1 uses a disc composed of copper and resin which has a better polishing effect than a disc of pure copper.

Example 2

[0039] The disc containing copper 1 of example 1 is applied to a polishing machine with two discs containing copper facing each other as shown in FIG. 5, the disc containing copper 1 having an upper disc 1 and a lower disc 1 that rotate in opposite directions. The upper disc 1 is provided above the lower disc 1 via a lifting suspension arm 8. A lower disc turning tool 7 pointing downward is fixed to the lifting suspension arm 8 on one side of the upper disc 1; an upper disc turning tool 9 is fixed to a position on a side of the lower disc 1 that is opposing to the above one side of the upper disc 1. In specific, the lower disc 1 and the upper disc turning tool 9 are provided on a transverse guide rail 6 of the polishing machine with two discs containing copper facing each other via a mounting seat, and are driven by a motor to be fed along the transverse guide rail 6, wherein, the upper disc turning tool 9 and the lower disc turning tool 7 are provided transversely along the direction of the guide rail, and the horizontal distance from the lower disc turning tool 7 to the edge of the upper disc 1 equals to a horizontal distance from the upper disc turning tool 9 to the edge of the lower disc 1; and a vertical distance from the tip of the upper disc turning tool 9 to the upper disc 1 equals to a vertical distance from the tip of the lower disc turning tool 7 to the lower disc 1. Thus, the upper disc turning tool and the lower disc turning tool can repair the corresponding disc simultaneously, and thereby enhances the grinding efficiency.

[0040] After the upper and lower discs are worn, the steps for repairing the discs are as follows: first, moving the upper disc 1 and the lower disc turning tool 7 in a vertical direction, and horizontally transversely moving the lower disc 1 and the upper disc turning tool 9 to align the turning tool with the original position of the grinding groove on the disc containing copper; second, controlling the upper disc 1 and the lower disc 1 to rotate in opposite directions at the same speed and with the turning tools fixed, and controlling the lower disc 1 and the upper disc turning tool 9 to be fed along the transverse guide rail 6 continually, repairing the grinding groove on the corresponding disc with the turning tools; third, removing the turning tools and washing away the residue on the corresponding disc-containing-copper surface.

[0041] In this example, the grinding groove is the continuous spiral groove of example 1. In the second step of controlling the lower disc to be transversely fed continually, the rotation speed and the transverse feeding speed of the disc containing copper are determined according to the size of the discs containing copper and the spacing and the number of turns of the spiral grooves. Specifically, as one example, the upper and lower discs have an outer diameter of 1070 mm and an inner diameter of 495 mm. The rotation speed of the upper and lower discs are 40 rpm (round per minute). The feeding speed of the lower disc is 0.30 mm/r (round). The process ultimately produces a continuous spiral grinding groove with a spacing of 1.3 mm and a groove depth of 0.30 mm.

[0042] Meanwhile, the stepped groove 12 of the disc containing copper in example 1 can also be processed with a corresponding turning tool. When the polishing groove at the middle part of the disc containing copper is worn flat with the stepped groove 12, the stepped groove can be repaired by the turning tool.

[0043] When the method of the present disclosure is applied to the repair of concentric circular grinding grooves, the method of multiple quantitative repairing can be performed; that is, after one circle of the grinding grooves is repaired at one time, the turning tool can be transversely fed by a gap of the groove to perform another turning. The specific parameters are determined according to the size of the discs containing copper and the grinding grooves, and will not be further described here.

[0044] Using the above method can realize automatic repairing the discs. The spiral grinding groove can be repaired and turned at one turning/time; and the concentric circular grinding grooves can be repaired through multiple turnings/times, saving the need for removing the grinding disc. The labor intensity is released, and the productivity is greatly increased.

[0045] While the present disclosure has been described with reference to exemplary examples, it is to be understood that within the spirit and scope defined by the following claims, all modifications of the present disclosure, in form and in detail, are included in the protection scope of the present disclosure.