NZ795649B2 - A Method of Manufacturing a Cotter Pin with Separation Preventing Means - Google Patents
A Method of Manufacturing a Cotter Pin with Separation Preventing MeansInfo
- Publication number
- NZ795649B2 NZ795649B2 NZ795649A NZ79564920A NZ795649B2 NZ 795649 B2 NZ795649 B2 NZ 795649B2 NZ 795649 A NZ795649 A NZ 795649A NZ 79564920 A NZ79564920 A NZ 79564920A NZ 795649 B2 NZ795649 B2 NZ 795649B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- forming
- cutting
- shaped body
- separation preventing
- preventing means
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
Abstract
cotter pin to which a separation-prevention means is coupled, and a manufacturing method therefor, according to the present invention, comprises: a material cutting step; a heating step of heating a cut preform; a first forming step of forming dome-shaped head parts on both ends thereof; a cutting step of cutting same so as to form split bodies; a second forming step of performing formation at the lower ends of the split bodies; a third forming step of forming a bottom groove; a through-hole forming step; and a step of fastening a separation-prevention means, and thus the separation-prevention means and a cotter pin are integrated, and two cotter pins are manufactured with one process cycle so that work efficiency and productivity are maximized and costs are economically reduced.
Claims (2)
1. A method of manufacturing a cotter pin with a separation preventing means, the method comprising: a material cutting step of forming a preform by cutting a cylindrical, aluminium alloy material to a predetermined length a heating step of heating the preform to a temperature of 1100 °C to 1200 °C for 5 seconds to 15 seconds; a first shaping step of forming a double-head shaped body by means of press forging so that a dome-shaped head is formed at each of opposite ends of the heated preform; a cutting step of cutting the double-head shaped body to form two segmented shaped bodies each of which has a predetermined length (r); a second shaping step of forming a side groove of a predetermined length extending from a lower end of each of the segmented shaped bodies toward the head thereof at each of opposite sides of a side surface of the segmented shaped body, the side groove being form by forging; a third shaping step of forming a lower groove in a lower surface of the segmented shaped body by means of forging so that lower ends of the respective side grooves formed at the opposite sides of the side surface of the segmented shaped body are connected to each other; a through-hole forming step of forming a through-hole so as to pass through the side grooves formed at the opposite sides of the side surface of the segmented shaped body; and a separation preventing means coupling step of inserting the separation preventing means into the through-hole, the separation preventing means having an opening, an elastic portion, and an extension portion, and being configured to be rotated in response to manipulation by an operator to change between a locked state and a released state while maintaining a state coupled to the cotter pin by insertion into the through- hole.
2. The method of claim 1, wherein the heating step is performed by placing a plurality of preforms resulting from cutting on top of a rail at positions spaced apart from each other and by continuously moving the preforms. HM Corporation By the Attorneys for the Applicant SPRUSON & FERGUSON
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200070146A KR102415055B1 (en) | 2020-06-10 | 2020-06-10 | Manufacturing method for cotter pins combined with anti-separation pins |
| PCT/KR2020/011669 WO2021251552A1 (en) | 2020-06-10 | 2020-09-01 | Cotter pin to which separation-prevention means is coupled, and manufacturing method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ795649A NZ795649A (en) | 2025-05-30 |
| NZ795649B2 true NZ795649B2 (en) | 2025-09-02 |
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