Patent Application
20150068015
The present disclosure relates to embedded nuts, and more particularly, to an embedded nut assembled in an amorphous alloy sheet, and a method of assembling the embedded nut to an amorphous alloy sheet.
Amorphous alloys have certain physical, chemical, and mechanical properties, such as high strength, high hardness, high wear resistance, high corrosion resistance, high plasticity, high resistance, good superconductivity, and low magnetic loss; thus, they have been applied in a wide range of fields, such as mechanics, medical equipment, electrical applications, and for military purposes.
The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views.
This disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like reference numbers indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one”.
The Zr-based amorphous alloy sheet 10 is made by pressure embedding process, and can include about 50 to 70 percent by weight zirconium (Zr), 10 to 15 percent by weight copper (Cu), 5 to 10 percent by weight nickel (Ni), 5 to 20 percent by weight niobium (Nb), and 5 to 10 percent by weight aluminum (Al). The Zr-based amorphous alloy sheet 10 can have other elements.
The middle portion 220 of the embedded nut 20 can be hollow and post-shaped, and an outer surface of the middle portion 220 is a cylindrical surface 221 which is smooth. The cylindrical surface 221 is matched with the assembly hole 110, and a diameter of the cylindrical surface 221 can be substantially equal to the diameter of the bottom assembly hole 113.
The top portion 210 includes a shoulder 211 connected with the middle portion 220. The shoulder 211 and the middle portion 220 can form a stepped structure. The edge of the shoulder 211 defines a toothed portion comprising a plurality of teeth 212. The plurality of teeth 212 have a thickness substantially equal to the shoulder 211. As the embedded nut 20 includes a plurality of teeth 212, the embedded nut 20 which has a lower hardness is easy to be embedded into the Zr-based amorphous alloy sheet 10 which has a higher hardness, and the connection strength of the embedded nut 20 and the Zr-based amorphous alloy sheet 10 is improved. The top portion 210 further includes a plurality of concave spaces 213 between two neighboring teeth 212. When pressing the embedded nut 20 into the Zr-based amorphous alloy sheet 10, the edge of the teeth 212 can be cut, thus metal scraps from the teeth 212 can be generated. The metal scraps can be received in and removed from the concave spaces 213. A diameter of the top portion 210 is slightly larger than the diameter of the top assembly hole 110, so that the embedded nuts 20 can be assembled in the Zr-based amorphous alloy sheet 10 by an interference fit.
The bottom portion 230 includes a first side surface 231 and a second side surface 232 connected with the first side surface 231. The first side surface 231 and the second side surface 232 are annular, and connected with the middle portion 220. The first side surface 231 defines a circular hole in the center. The bottom portion 230 further includes a chamfered portion 233 which is annular between the first side surface 231 and the second side surface 232. The chamfered portion 233 prevents any shifting of the embedded nut 20 when being initially pressed into the Zr-based amorphous alloy sheet 10.
The embedded nut 20 further includes a threaded portion 250 arranged on the inner surface of the top portion 210, the middle portion 220, and the bottom portion 230.
In at least one embodiment, the embedded nut 20 is made of titanium alloy to have high hardness. The embedded nut 20 can include Al, manganese (Mn), iron (Fe), carbon (C), nitrogen (N), hydrogen (H), oxygen (02), titanium (Ti), and other impurities. The embedded nut 20 can also be made of an alloy including Al, vanadium (V), Fe, C, N, H, O2, Ti, and impurities. For example, the embedded nut 20 includes 1.0 to 2.5 percent by weight of Al, 0.7 to 2.0 percent by weight of Mn, equal to or less than 0.30 percent by weight of Fe, equal to or less than 0.08 percent by weight of C, equal to or less than 0.05 percent by weight of N, equal to or less than 0.012 percent by weight of H, equal to or less than 0.15 percent by weight of 02, equal to or less than 0.4 percent by weight of impurities, and the remainder of Ti.
The precision of the assembly can be increased and the embedded nut 20 does not shift in the assembly hole 110 because the bottom portion 230 of the embedded nut includes the chamfering 233. After the embedded nut 20 is assembled into the Zr-based amorphous alloy sheet 10, the shoulder 211 is squeezed into the assembly hole 110 until substantially coplanar with the surface of the Zr-based amorphous alloy sheet 10. The teeth 212 are inserted into the Zr-based amorphous alloy sheet 10, thus the connection strength is increased. Only a few portions of the teeth may be cut, and the metal scraps can be received in the spaces 213 between the teeth and removed those spaces. After the embedded nut is assembled, the Zr-based amorphous alloy sheet 10 presents a neat and clean appearance, and the fitment-size of the alloy sheet 10 will not be affected.
The embedded nut 20 has the advantages of high assembly accuracy and high tensile strength. In testing, the compressive strength shows about 200 to 400 Mpa, and the torsional capabilities are about 3.0˜6.0 kgfcm. The embedded nut 20 satisfies the requirements of a welded assembly in the electronics industry.
It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes can be made thereto without departing from the scope of the embodiments or sacrificing all of its material advantages. The embodiments described herein are illustrative only and should not be construed to limit the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2013104018705 | Sep 2013 | CN | national |
