CN102284534A - Cold-forming method for hexagon flange face bolt - Google Patents
Cold-forming method for hexagon flange face bolt Download PDFInfo
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- CN102284534A CN102284534A CN2011102087311A CN201110208731A CN102284534A CN 102284534 A CN102284534 A CN 102284534A CN 2011102087311 A CN2011102087311 A CN 2011102087311A CN 201110208731 A CN201110208731 A CN 201110208731A CN 102284534 A CN102284534 A CN 102284534A
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Abstract
The invention discloses a cold-forming method for a hexagon flange face bolt. The method comprises the steps of blanking and shaping perform, manufacturing a pre-deformed part, shrinking and extruding the hexagon and extruding a flange to form the flange and particularly comprises the following steps of: a, after blanking and shaping the perform, manufacturing the pre-deformed part with a determined shape, wherein the pre-deformed part with the determined shape consists of a top part, a head cylinder, a cone connected below the head cylinder and a long cylinder; b, shrinking and extruding the hexagon of the pre-deformed part, shrinking and extruding the upper part of the head cylinder of the pre-deformed part into a hexagonal column by a shrinking and extruding process, and shrinking and extruding the connecting part of the hexagonal column and the cylinder into a transitional cone; and c, extruding the flange to form the flange, namely, extruding the transitional cone below the hexagonal column which is shrunk and extruded and the cylinder into the flange to form the hexagon flange face bolt meeting the part requirement. By the new cold-forming process for the hexagon flange face bolt, metal flow is more reasonable; volume distribution is more reasonable; and no finning phenomenon occurs.
Description
Technical field
The present invention relates to the cold forming method that a kind of bolt head is a flange face, particularly hexagon flange bolt cold forming method.
Background technology
Existing hexagon flange bolt production method is that elder generation's process is to after biscuit blanking shaping and the predeformation, adopt to squeeze the method for cutting be shaped turret head and flange face, want rule owing to will guarantee the crowded back turret head of cutting, the hexagonal corner angle avoid occurring excessive fillet by the end, guarantee the stubborn height of plate, so performing member is a cone, the diameter of cone small end is greater than the diagonal-size of turret head, the crowded mould of cutting at first begins down to squeeze from the cone small end when cutting because squeeze, squeeze and to cut in the process mould and contact with blank afterwards that metal is down excised, if the small end of blank is less than the hexagonal diagonal-size, mould squeezes the position of cutting will be toward moving down, contact with blank up to the hexagonal die orifice, the position that does not contact with mould just becomes big fillet, and part quality does not reach requirement.Obtain by practice in addition, the big end size of cone if than the size of flange face cylindrical little too much, the flange face excircle dimension that squeezes after cutting does not just reach requirement, defective can appear after the side cut, the bottom that is plum blossom shape overlap does not have cut, the outside diameter in tapering forms six breach, so will approach the excircle dimension of flange face.Performing member is cut the back forms the plum blossom shape at flange face cylindrical place overlap through squeezing, and excises the plum blossom overlap subsequently again, owing to produce bigger overlap, so material consumption increases, stock utilization reduces in deformation process.Simultaneously to cut the resistance of deformation that mould bears in hexagonal and the shaping flange face process big squeezing, and squeezes that to cut die life lower, adopts in addition and squeeze cutting process at the small gap that place, hexagonal diagonal angle can occur being torn, and influenced part quality.
Summary of the invention
The objective of the invention is provides a kind of metal flow that makes more reasonable in order to solve above-mentioned the deficiencies in the prior art, and volume distributes more rational hexagon flange bolt cold forming method.
To achieve these goals, the hexagon flange bolt cold forming method that the present invention is designed comprises that employing is shaped to biscuit blanking shaping, manufacturing predeformation part, the crowded hexagonal that contracts, extruding flange, is characterized in that concrete steps are as follows:
A, to make determining the predeformation part of shape after the biscuit blanking shaping, the predeformation part of described definite shape is made up of top, head cylinder, the cone and the elongated cylinder that are connected head cylinder below, the top is made of segment and cone;
B, to the predeformation part crowded hexagonal that contracts, wherein adopt the extruding process that contracts to contract on the cylindrical top of the head of predeformation part and squeeze and be the hexagonal cylinder, reserve the cylinder of the cylindrical lower part of head, simultaneously, the transition circle cone that is contracted and be extruded in hexagonal cylinder and cylindrical junction;
C, push flange again and be shaped, the predeformation part that is about to contract after squeezing forms flange by the mould that makes with the transition circle cone and the cylinder extruding of hexagonal cylinder below, forms the hexagon flange bolt that meets the part requirement.
The top of described predeformation part can be 2 millimeters-3 millimeters, the gradient α that is connected the cone of head cylinder below is 15 °, the cylindrical cylindrical of head is slightly larger than contract when squeezing hexagonal 0.1 millimeter-0.2 millimeter of part hexagonal diagonal-size of next station, it is highly about consistent with the height of standard flange face bolt head, and head cylinder rounding band height is no less than 85% of its height, require fullly, its surface does not allow and scratches and plucking.
The opposite side lower limit that the hexagonal opposite side undersized of described hexagonal cylinder requires in part, the height of hexagonal cylinder approaches the hexagonal height that part requires, the gradient β of transition circle cone is about 25 °, and remaining cylindrical height is determined according to the size of flange face diameter.
The hexagon flange bolt cold forming method that the present invention obtains makes the metal volume distortion more reasonable, has eliminated the overlap that produces in the deformation process, compares with original deformation technique, and stock utilization has improved about 2%; Make metal flow more reasonable, reduced resistance of deformation, significantly improve main die life, can bring considerable economic.
Description of drawings
Fig. 1 is the predeformation product structural representation of the predeformation operation of embodiment;
Fig. 2 is that contracting of implementation column squeezed the product structural representation of hexagonal operation;
Fig. 3 is that contracting of implementation column squeezed the product vertical view of hexagonal operation;
Fig. 4 is the product structural representation of the extruding flange forming process of embodiment.
Among the figure: top 1, head cylinder 2, hexagonal cylinder 21, cylinder 22, transition circle cone 23, cone 3, elongated cylinder 4.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment:
The hexagon flange bolt cold forming method that present embodiment provides, comprise employing to biscuit blanking shaping, make predeformation part, the crowded hexagonal that contracts, push flange at last and be shaped.
At first, biscuit blanking shaping; Owing to should be prior art, not be described in detail at this.
A, as shown in Figure 1: at first enter second station after the biscuit blanking shaping and carry out predeformation, the top 1 that the predeformation part is made of highly less segment and cone, head cylinder 2 is formed with cone 3 that is connected head cylinder 2 belows and elongated cylinder 4, the top 1 of predeformation part is 2 millimeters-3 millimeters, the gradient α that is connected the cone 3 of head cylinder 2 belows is 15 °, the cylindrical of head cylinder 2 is slightly larger than next station part hexagonal diagonal-size when squeezing hexagonal that contracts, it can be 0.1 millimeter-0.2 millimeter, its height is determined according to the diameter of flange face, and head cylinder 2 rounding band height are no less than 85% of its height, require full, the cone when cutting hexagonal is squeezed in the employing different from the past of this operation, required material volume still less, the outside diameter of cylinder rounding band is slightly larger than next station hexagonal diagonal-size when squeezing hexagonal that contracts, and makes the diagonal angle that contracts when squeezing hexagonal full.
B, the later part of predeformation are admitted to down the station crowded hexagonal that contracts.Design of part after processed as shown in Figure 2, its process is: the part of the head cylinder 2 of predeformation part is adopted the extruding process that contracts to contract and squeezes be hexagonal cylinder 21, simultaneously, hexagonal cylinder 21 is contracted with the junction of its below cylinder 22 be extruded into transition circle cone 23; Transition circle cone 23 described here is a kind of incomplete cones, the opposite side lower limit that the hexagonal opposite side undersized of hexagonal cylinder 21 requires in part, the height of hexagonal cylinder 21 approaches the hexagonal height that part requires, as shown in Figure 3, the gradient β of transition circle cone 23 is about 25 °, and the height of remaining cylinder 22 is determined according to the size of flange face diameter.The residue barrel portion that head cylinder 2 is contracted after squeezing is to be used to the flange face that is shaped at postorder, require this cylinder roughness of excircle to want high, do not allow scuffing and plucking, otherwise defective can occur at the flange cylindrical when the shaping flange face, its height is determined according to different flange face external diameters sizes.
Deformable member after c, the crowded hexagonal that contracts is admitted to next station again, the predeformation part that is about to contract after squeezing forms flange faces by the mould that makes with the transition circle cone 23 and cylinder 22 extruding of hexagonal cylinder 21 belows, forms the hexagon flange bolt that meets the part requirement.Design of part after the shaping as shown in Figure 4, the segment complanation at the top 1 of hexagonal cylinder 21, the transition circle cone 23 and the cylinder 22 of hexagonal cylinder 21 belows are squeezed into flange face, the turret head regular shape of hexagonal cylinder 21, hexagonal opposite side size reaches product requirement, flange face excircle dimension and each spot size after the shaping all reach product requirement, do not have the overlap of plum blossom shape, do not need reprocessing.
Claims (3)
1. hexagon flange bolt cold forming method, comprise employing to biscuit blanking shaping, make predeformation part, the crowded hexagonal that contracts, extruding flange and be shaped, it is characterized in that concrete steps are as follows:
A, to make determining the predeformation part of shape after the biscuit blanking shaping, the predeformation part of described definite shape by top (1), head cylinder (2), be connected the cone of head cylinder (2) below
(3) and elongated cylinder (4) form, top (1) is made of segment and cone;
B, to the predeformation part crowded hexagonal that contracts, wherein the top of the head cylinder (2) of predeformation part is adopted the extruding process that contracts to contract and squeezed and be hexagonal cylinder (21), reserve the cylinder (22) of the lower part of head cylinder (2), simultaneously, the transition circle cone (23) that is contracted and be extruded in the hexagonal cylinder (21) and the junction of cylinder (22);
C, push flange again and be shaped, the predeformation part that is about to contract after squeezing forms flange by the mould that makes with the transition circle cone (23) and cylinder (22) extruding of hexagonal cylinder (21) below, and formation meets the hexagon flange bolt of part requirement.
2. hexagon flange bolt cold forming method according to claim 1, the top (1) that it is characterized in that described predeformation part is 2 millimeters-3 millimeters, the gradient α that is connected the cone (3) of head cylinder (2) below is 15 °, the cylindrical of head cylinder (2) is greater than contract when squeezing hexagonal 0.1 millimeter-0.2 millimeter of part hexagonal diagonal-size of next station, and it is highly about consistent with the height of standard flange face bolt head.
3. hexagon flange bolt cold forming method according to claim 1, the hexagonal opposite side undersized that it is characterized in that described hexagonal cylinder (21) is in the opposite side lower limit 0.1 of part requirement, the height of hexagonal cylinder (21) approaches the hexagonal height that part requires, the gradient β of transition circle cone (23) is about 25 °, and the height of remaining cylinder (22) is determined according to the size of flange face diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102087311A CN102284534A (en) | 2011-07-25 | 2011-07-25 | Cold-forming method for hexagon flange face bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102087311A CN102284534A (en) | 2011-07-25 | 2011-07-25 | Cold-forming method for hexagon flange face bolt |
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| CN102284534A true CN102284534A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102087311A Pending CN102284534A (en) | 2011-07-25 | 2011-07-25 | Cold-forming method for hexagon flange face bolt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907482A (en) * | 2014-03-11 | 2015-09-16 | 上海申光高强度螺栓有限公司 | Manufacturing method of American system hexagon flange bolt and combined die |
| CN105345475A (en) * | 2015-11-09 | 2016-02-24 | 瑞安市华诺五金制造有限公司 | Technology for machining bolts |
| CN110102699A (en) * | 2019-04-30 | 2019-08-09 | 山东九佳紧固件股份有限公司 | Head filler screw cold-heading molding processing mold and its processing technology |
| CN111097867A (en) * | 2019-12-27 | 2020-05-05 | 上海鸿基金属制品有限公司 | Automobile timing chain tensioner perforating pin shaft forming process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211540A (en) * | 1997-01-29 | 1998-08-11 | Nikko Seira Seisakusho:Kk | Manufacture of hexagonal headed bolt |
| KR20090007566U (en) * | 2008-01-22 | 2009-07-27 | (주)일신 | BOLT omitted |
| CN101737395A (en) * | 2010-01-29 | 2010-06-16 | 郑洪琦 | Process for manufacturing small-sized looseness-proof screw |
| CN101780629A (en) * | 2010-04-08 | 2010-07-21 | 浙江裕泰紧固件制造有限公司 | Production process of special shaped screw bolt |
| CN101947567A (en) * | 2010-08-31 | 2011-01-19 | 瑞安市瑞强标准件有限公司 | Processing technique and processing device of flat-head hexagon bolt for cold extrusion shaping cart |
| CN201768834U (en) * | 2010-08-18 | 2011-03-23 | 浙江捷能汽车零部件有限公司 | Bolt cold forming die |
-
2011
- 2011-07-25 CN CN2011102087311A patent/CN102284534A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211540A (en) * | 1997-01-29 | 1998-08-11 | Nikko Seira Seisakusho:Kk | Manufacture of hexagonal headed bolt |
| KR20090007566U (en) * | 2008-01-22 | 2009-07-27 | (주)일신 | BOLT omitted |
| CN101737395A (en) * | 2010-01-29 | 2010-06-16 | 郑洪琦 | Process for manufacturing small-sized looseness-proof screw |
| CN101780629A (en) * | 2010-04-08 | 2010-07-21 | 浙江裕泰紧固件制造有限公司 | Production process of special shaped screw bolt |
| CN201768834U (en) * | 2010-08-18 | 2011-03-23 | 浙江捷能汽车零部件有限公司 | Bolt cold forming die |
| CN101947567A (en) * | 2010-08-31 | 2011-01-19 | 瑞安市瑞强标准件有限公司 | Processing technique and processing device of flat-head hexagon bolt for cold extrusion shaping cart |
Non-Patent Citations (1)
| Title |
|---|
| 杨建明: "高强度12角头法兰面螺栓的冷墩成形工艺", 《汽车科技》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907482A (en) * | 2014-03-11 | 2015-09-16 | 上海申光高强度螺栓有限公司 | Manufacturing method of American system hexagon flange bolt and combined die |
| CN105345475A (en) * | 2015-11-09 | 2016-02-24 | 瑞安市华诺五金制造有限公司 | Technology for machining bolts |
| CN110102699A (en) * | 2019-04-30 | 2019-08-09 | 山东九佳紧固件股份有限公司 | Head filler screw cold-heading molding processing mold and its processing technology |
| CN111097867A (en) * | 2019-12-27 | 2020-05-05 | 上海鸿基金属制品有限公司 | Automobile timing chain tensioner perforating pin shaft forming process |
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Application publication date: 20111221 |