Long-specification bolt head height once-forming mold
A technology for forming molds and bolt heads, which is applied to bolts, manufacturing tools, threaded fasteners, etc., can solve the problems of many scrapped products, high and unstable bolt heads, and consumption of mold materials and labor, so as to reduce production costs and labor. cost, ensure high stability of the bolt head, and improve the effect of forming accuracy
Pending Publication Date: 2019-06-07
MORGAN HARDWARE KUSN
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Problems solved by technology
[0002] When the traditional slender bolts are formed by multi-station automatic cold heading, due to the softness and hardness of the wire, the thickness of the outer diameter, ellipse, and the addition of multiple mold passes, the head height is still high when the ordinary mold is used for continuous production. It can be controlled within the specified range, but once the length is >150mm, the above-mentioned factors due to the wire material are superimposed, and the height of the bolt head is extremely unstable, fluctuating from high to low, and it is difficult to control. The sheet mold of the traditional bolt forming mold is directly placed on the mold shell. The sheet mold is a vulnerable part. When pressed, the mold shell is easy to crack, the exhaust of the mold is not smooth, and the thickness of a sheet mold of a specification requires a mold shell. If the sheet mold is damaged, the entire mold shell needs to be replaced. When bolts of different specifications are formed, they must be replaced together with the mold shell, which consumes mold materials and manpower, and is inconvenient to replace, affecting production efficiency.
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Embodiment
[0025] Embodiment: A kind of high one-time forming die of long specification bolt head, comprises preliminary forming die, preforming die and bolt head forming die, wherein:
[0026] The preforming mold includes a preforming fixed mold and a preforming movable mold, wherein the preforming fixed mold includes a first mold shell 1, a first inner mold 2, a first sheet mold 3, a first sheet mold cladding steel 4 and a first head 5. The first sheet mold cladding steel 4 can be disassembled and fixedly inserted inside one end of the first mold shell 1, the first sheet mold 3 is fixedly inserted inside the first sheet mold cladding steel 4, and the inside of the first sheet mold 3 The preformed cavity of the bolt head is formed, the first inner mold 2 is inserted in the first mold shell 1, the inner side of the first inner mold 2 forms the preformed cavity of the stud part of the bolt, and the first head 5 is detachably fixed Inserted in the other end of the first mold shell 1, the t...
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The invention discloses a long-specification bolt head height once-forming mold which comprises a preliminary forming mold, a pre-forming mold and a bolt head forming mold. Fixed molds of the pre-forming mold and the bolt head forming mold are detachably provided with sheet mold cladding steel at one end of a mold shell, sheet molds are installed in the sheet mold cladding steel, and an inner moldis arranged in the mold shell and abuts against a sealing head end face through the sheet mold cladding steel to be positioned; and movable molds of the pre-forming mold and the bolt head forming mold each comprise a movable mold plate and a punch pin, and the punch pin of the movable mold of the bolt head forming mold is further provided with a punching bar extending out of the outer side of thepunch pin to be used for forming a bolt head wrench groove. The long-specification bolt head height once-forming mold reduces the production cost and the labor cost, improves the replacement efficiency, greatly improves the product quality, ensures the bolt head height stability, and avoids product scrapping.
Description
technical field [0001] The invention relates to the technical field of screw processing, in particular to a long specification bolt head high one-time molding die. Background technique [0002] When the traditional slender bolts are formed by multi-station automatic cold heading, due to the softness and hardness of the wire, the thickness of the outer diameter, ellipse, and the addition of multiple mold passes, the head height is still high when the ordinary mold is used for continuous production. It can be controlled within the specified range, but once the length is >150mm, the above-mentioned factors due to the wire material are superimposed, and the height of the bolt head is extremely unstable, fluctuating from high to low, and it is difficult to control. The sheet mold of the traditional bolt forming mold is directly placed on the mold shell. The sheet mold is a vulnerable part. When pressed, the mold shell is easy to crack, the exhaust of the mold is not smooth, an...
Claims
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Login to View More IPC IPC(8): B21J13/02B21K1/50
Inventor 凃春旺林茂森
Owner MORGAN HARDWARE KUSN