التفاصيل البيبلوغرافية
| العنوان: |
METHOD FOR MAKING METALLIC COVER |
| Document Number: |
20120267250 |
| تاريخ النشر: |
October 25, 2012 |
| Appl. No: |
13/541039 |
| Application Filed: |
July 03, 2012 |
| مستخلص: |
A method for making a metallic cover including the following steps. Drawing an aluminum alloy sheet that has a yield strength in a range from about 80 MPa to about 150 MPa, an elongation ratio in a range from about 15% to about 28%, and a hardness in a range from about 45 HV0.2 to about 70 HV0.2 to form a preformed cover. The preformed cover includes a bottom base and a plurality of side walls, and each of the side wall and the bottom base are connected by a curved-cornered edge. Pressing the curved-cornered edge of the preformed cover into a sharp-cornered edge structure by a forming die. Polishing the preformed cover. Anodizing the polished preformed cover to form the metallic cover. |
| Inventors: |
YI, HONG-ZHAN (Shenzhen City, CN); XU, AI-JUN (Shenzhen City, CN); TAI, LONE-WEN (Tu-Cheng, TW); WU, ZI-LI (Shenzhen City, CN); DAI, JUN (Shenzhen City, CN); YUAN, XIAO-BO (Shenzhen City, CN) |
| Assignees: |
HON HAI PRECISION INDUSTRY CO., LTD. (Tu-Cheng, TW), HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD. (Shenzhen City, CN) |
| Claim: |
1. A method for making a metallic cover, comprising: forming a preformed cover by drawing an aluminum alloy sheet, the aluminum sheet having a yield strength in a range from about 80 MPa to about 150 MPa, an elongation ratio in a range from about 15% to about 28%, and a hardness in a range from about 45 HV0.2 to about 70 HV0.2, the preformed cover having a bottom base and a plurality of side walls, and each of the side walls and the bottom base being connected by a curved-cornered edge; pressing the curved-cornered edge of the preformed cover into a sharp-cornered edge by a forming die; polishing the preformed cover; and anodizing the polished preformed cover to form the metallic cover. |
| Claim: |
2. The metallic cover as claimed in claim 1, wherein the aluminum alloy sheet is made of 5052-O aluminum alloy, and a yield strength of the 5052-O aluminum alloy is about 110 MPa, an elongation ratio of the 5052-O aluminum alloy is about 26%, a hardness of the 5052-O aluminum alloy is about 65 HV0.2, and a zinc concentration is about 0.07%. |
| Claim: |
3. The metallic cover as claimed in claim 1, wherein the aluminum alloy sheet is made of 6061-T4 aluminum alloy, and a yield strength of the 6061-T4 aluminum alloy is about 90 MPa, an elongation ratio of the 6061-T4 aluminum alloy is about 26%, a hardness of the 6061-T4 aluminum alloy is about 60 HV0.2, and a zinc concentration is about 0.06%. |
| Claim: |
4. The metallic cover as claimed in claim 1, wherein the angle formed between an outer surface of the bottom base and the outer surface of each of the sidewalls at the sharp-cornered edge is in the range from 90 degrees to 135 degrees. |
| Claim: |
5. The metallic cover as claimed in claim 1, wherein the forming die includes an upper die and a lower die, the upper die is movable relative to the lower die, the upper die defines a mold groove facing a forming surface of the lower die, and the mold groove of the upper die and the forming surface of the lower die cooperatively press the curved-cornered edge of the preformed cover into the sharp-cornered edge. |
| Claim: |
6. The metallic cover as claimed in claim 1, wherein the aluminum alloy sheet includes a sensitive portion, W represents a width of the sensitive portion, and t represents a thickness of the aluminum alloy sheet, and a width-thickness ratio of the sensitive portion is 0
|
| Claim: |
7. The metallic cover as claimed in claim 6, wherein the aluminum alloy sheet is made of 5052-O aluminum alloy, and W/t is 0.23. |
| Current U.S. Class: |
205/50 |
| Current International Class: |
25; 25 |
| رقم الانضمام: |
edspap.20120267250 |
| قاعدة البيانات: |
USPTO Patent Applications |