초록 ▼

The present invention relates to a method for manufacturing a bolt that includes an axis, including the steps of providing a metal rod, providing a die, extruding the metal rod through use of the die, cold forming the metal rod, at least in part, to provide a shaft and a head so that, the head inclu

The present invention relates to a method for manufacturing a bolt that includes an axis, including the steps of providing a metal rod, providing a die, extruding the metal rod through use of the die, cold forming the metal rod, at least in part, to provide a shaft and a head so that, the head includes a torque transferring structure, the head includes a flange located adjacent to the torque transferring structure, a generally cylindrical surface is located adjacent to the flange, and a sloping surface that extends from the generally cylindrical surface towards the axis, rolling a threaded surface into the shaft, and providing a plurality of grooves so that the grooves extend from an end of the bolt.

대표청구항 ▼

The invention claimed is: 1. A method for fabricating a bolt that includes an axis, comprising the steps of: a) providing a metal rod; b) providing a die; c) extruding the metal rod through use of the die; d) cold forming the metal rod, at least in part, to provide a shaft and a head so that: i) th

The invention claimed is: 1. A method for fabricating a bolt that includes an axis, comprising the steps of: a) providing a metal rod; b) providing a die; c) extruding the metal rod through use of the die; d) cold forming the metal rod, at least in part, to provide a shaft and a head so that: i) the head includes a torque transferring structure; ii) the head includes a flange located adjacent to the torque transferring structure; iii) a generally cylindrical surface is located adjacent to the flange; iv) a sloping surface that extends from the generally cylindrical surface towards the axis; e) rolling a threaded surface into the shaft; and f) providing a plurality of grooves so that the grooves extend from an end of the bolt. 2. A method for fabricating a bolt according to claim 1, wherein the metal rod includes a low carbon steel. 3. A method for fabricating a bolt according to claim 1, further comprising the step of locating the sloping surface between the generally cylindrical surface and the threaded surface. 4. A method for fabricating a bolt that includes an axis, comprising the steps of: a) providing a metal rod; b) providing a die; c) extruding the metal rod through use of the die; d) cold forming the metal rod, at least in part, to provide a shaft and a head so that: i) the head includes a torque transferring structure; ii) the head includes a flange located adjacent to the torque transferring structure; iii) a first generally cylindrical surface is located adjacent to the flange; iv) a second generally cylindrical surface is provided on the bolt; v) a sloping surface extends towards the axis and is located between the first generally cylindrical surface and the second generally cylindrical surface; e) providing a threaded surface located adjacent to the second generally cylindrical surface; and f) providing a plurality of grooves so that the grooves extend from an end of the bolt. 5. The method for fabricating a bolt according to claim 4, wherein the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface. 6. The method for fabricating a bolt according to claim 4, wherein the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 7. The method for fabricating a bolt according to claim 4, wherein: a) the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface; and b) the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 8. A method for fabricating a bolt according to claim 4, wherein the metal rod includes a low carbon steel. 9. A method for fabricating a bolt that includes an axis, comprising the steps of: a) providing a metal rod; b) providing a die; c) extruding the metal rod through use of the die; d) cold forming the metal rod, at least in part, to provide a shaft and a head so that: i) the head includes a torque transferring structure; ii) the head includes a flange located adjacent to the torque transferring structure; iii) a first generally cylindrical surface is located adjacent to the flange; iv) a second generally cylindrical surface is provided on the bolt; v) a surface that slopes radially from the second generally cylindrical surface is located between the first generally cylindrical surface and the second generally cylindrical surface; e) providing a threaded surface adjacent to the second generally cylindrical surface; and f) providing a plurality of grooves so that the grooves extend from an end of the bolt. 10. The method for fabricating a bolt according to claim 9, wherein the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 11. The method for fabricating a bolt according to claim 9, wherein the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface. 12. The method for fabricating a bolt according to claim 9, wherein: a) the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface; and b) the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 13. The method for fabricating a bolt according to claim 9, wherein the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface extends radially from the second generally cylindrical surface to the first generally cylindrical surface. 14. The method for fabricating a bolt according to claim 9, wherein: a) the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface extends radially from the second generally cylindrical surface to the first generally cylindrical surface; and b) the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 15. The method for fabricating a bolt according to claim 9, wherein the metal rod is cold formed, at least in part, to provide the shaft and the head so that the sloping surface extends radially from the second generally cylindrical surface to the first generally cylindrical surface and is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface. 16. The method for fabricating a bolt according to claim 9, wherein: a) the metal rod is cold formed, at least in part, to provide the shaft and the head so that the surface extends radially from the second generally cylindrical surface to the first generally cylindrical surface and is located adjacent to the first generally cylindrical surface and the second generally cylindrical surface; and b) the second generally cylindrical surface is provided with a diameter that is smaller than a diameter of the first generally cylindrical surface. 17. A method for fabricating a bolt according to claim 9, wherein the metal rod includes a low carbon steel.