CN101767178A - Manufacturing method of spline shaft by cold heading - Google Patents
Manufacturing method of spline shaft by cold heading Download PDFInfo
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- CN101767178A CN101767178A CN 200910238899 CN200910238899A CN101767178A CN 101767178 A CN101767178 A CN 101767178A CN 200910238899 CN200910238899 CN 200910238899 CN 200910238899 A CN200910238899 A CN 200910238899A CN 101767178 A CN101767178 A CN 101767178A
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Abstract
The invention discloses a manufacturing method of a spline shaft by cold heading. The spline shaft is provided with a rod part and a head part which are integrally molded by the cold heading. The method comprises the following steps: cutting a raw material into a workpiece with preset length by shearing; cutting into a cylindrical workpiece with the preset length by positive extruding so as to form the rod part and the head part; reversely extruding the head part so as to form a first guide cylinder at one end of the head part, which is far away from the rod part; positively extruding the rod part to form an annular inclined plane at the rod part and form a larger-diameter part and a small-diameter part; further positively extruding the rod part so as to form a second annular inclined plane and a second guide cylinder at the small-diameter part; simultaneously reversely extruding the head part so as to form a first spline at the position of the head part, which is close to a first guide cylinder; reversely extruding the rod part so as to form a second spline at the position of the rod part, which is adjacent to the head part; and simultaneously continuous upsetting the workpiece so as to form an annular flange part at the head part, therefore, the invention has high processing efficiency, more material saving and low manufacturing cost of products.
Description
Technical field
The present invention relates to the splined shaft production technology, relate in particular to a kind of manufacturing method of spline shaft by cold heading.
Background technology
Sedan door system limiting stopper assembly, generally comprise open and sealed two types, open limiting stopper assembly is simple in structure, cost is low, but in use easily sneak into foreign matter, thereby cause opening dumb at closing time and/or producing abnormal sound, even can't open or close by opposite house, and sealed stop can be avoided the generation of the problems referred to above.
In sealed limiting stopper assembly, spacer pin is its core component.And being subjected to the restriction of stop assembly structure and function, sealed stop need adopt splined shaft as its spacer pin.Spline shaft structure is special, required precision is higher, and the manufacturing process of existing splined shaft is the machining center and produces, and its existing technological process is: will cut bar and deliver to machining center and carry out turning, milling and annular knurl, the packing of product is carried out in heat treatment and surface treatment (oiling) then at last.Yet the machining central apparatus costs an arm and a leg (about RMB100 ten thousand), and working (machining) efficiency low (processing quantity was about 100 in per 8 hours), because of adopting machining, can produce more waste material simultaneously, and its metal streamline is also therefore destroyed, and product fatigue strength is low.
In summary, existing splined shaft production technology obviously exists inconvenience and defective on reality is used, so be necessary to be improved.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind of manufacturing method of spline shaft by cold heading, its working (machining) efficiency is higher, save material more, and cost of goods manufactured is low.
To achieve these goals, the invention provides a kind of manufacturing method of spline shaft by cold heading, this splined shaft has by cold-heading integrated bar portion and head, and this method may further comprise the steps:
The cylindricality workpiece of predetermined length is cut in A, forward extrusion, to form described bar portion and head;
B, the described head of backward extrusion form first guide cylinder with the end away from bar portion on described head;
C, the described bar of forward extrusion portion, with form first annular slope in described bar portion and form near described head than the major diameter part
Smaller diameter portion away from described head;
D, the further described bar of forward extrusion portion, to form second annular slope and second guide cylinder in described smaller diameter portion, the described head of backward extrusion simultaneously forms first spline with the position in close first guide cylinder of described head;
E, the described bar of backward extrusion portion to form second spline with the head position adjacent in described bar portion, carry out jumping-up to described workpiece simultaneously, to form annular flange portion at described head.
According to manufacturing method of spline shaft by cold heading of the present invention, also comprise after the described step e:
F, the described workpiece head first guide cylinder cylindrical is carried out turning processing to reach the final products requirement;
G, described workpiece is carried out gear rolling processing, between described first annular slope and described second annular slope, to form the straight-tooth of a plurality of axial settings;
H, described workpiece heat-treated reach its mechanical performance requirement.
According to manufacturing method of spline shaft by cold heading of the present invention, also comprise after the described step H described workpiece is carried out the surface-treated step.
According to manufacturing method of spline shaft by cold heading of the present invention, the diameter of the described bar portion that forms in the described steps A is less than the diameter of described head.
According to manufacturing method of spline shaft by cold heading of the present invention, described first spline that forms in described step D and the described step e and second spline comprise a plurality of even distributions and are axially set in spline tooth on the described workpiece.
According to manufacturing method of spline shaft by cold heading of the present invention, the described annular flange portion that forms in the described step e is between described first spline and second spline and near described first spline.
According to manufacturing method of spline shaft by cold heading of the present invention, the described flange part that forms in the described step e has aduncate radian.
According to manufacturing method of spline shaft by cold heading of the present invention, described splined shaft adopts multi-station cold-heading equipment to process continuously, and a plurality of stations are processed a plurality of splined shafts (per minute working (machining) efficiency＞70) simultaneously.
The manufacturing method of spline shaft by cold heading according to the present invention, described splined shaft are that door device uses with the spacer pin in the limiting stopper assembly.
The present invention adopts cold heading technique to produce splined shaft, and comprise that step has: the cylindricality workpiece of predetermined length is cut in forward extrusion, to form bar portion and head; The described head of backward extrusion forms first guide cylinder with the end away from described bar portion on head; The described bar of forward extrusion portion is to form annular slope and to form than major diameter part and smaller diameter portion in described bar portion; The further described bar of forward extrusion portion, to form second annular slope and second guide cylinder in described smaller diameter portion, the described head of backward extrusion simultaneously forms first spline with the position in close first guide cylinder of described head; The described bar of backward extrusion portion to form second spline with the head position adjacent in described bar portion, carries out jumping-up to described workpiece simultaneously, forms annular flange portion at described head.In whole cold upsetting production process, do not have cutting and produce, avoided traditional handicraft to adopt that turning produces and spillage of material that cause, so the present invention save material more, cost of goods manufactured is low; Simultaneously, adopt continuous multi-station cold-heading equipment to process, each station is finished one of them step, and a plurality of stations are processed a plurality of splined shafts simultaneously, working (machining) efficiency higher (per minute processing quantity is greater than 70).Whereby, working (machining) efficiency of the present invention is higher, saves material more, and cost of goods manufactured is low.
Description of drawings
Fig. 1 is the flow chart of manufacturing method of spline shaft by cold heading of the present invention;
Fig. 2 is that workpiece of the present invention is through the three-dimensional structure diagram after the step S101;
Fig. 3 is that workpiece of the present invention is through the three-dimensional structure diagram after the step S102;
Fig. 4 is that workpiece of the present invention is through the three-dimensional structure diagram after the step S103;
Fig. 5 is that workpiece of the present invention is through the three-dimensional structure diagram after the step S104;
Fig. 6 is that workpiece of the present invention is through the side view after the step S105;
Fig. 7 is the subsequent flow of manufacturing method of spline shaft by cold heading of the present invention; And
Fig. 8 is the side view of splined shaft final structure of the present invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, a kind of manufacturing method of spline shaft by cold heading of the present invention, this splined shaft are the spacer pin of door device in the limiting stopper assembly, have bar portion 10 and head 20 by cold-heading molding, and the method comprising the steps of has:
Step S101, the cylindricality workpiece 100 of predetermined length is cut in forward extrusion, to form bar portion 10 and head 20.Preferably, workpiece 100 is a cylinder, and length is preset as 76.5mm.Fig. 2 shows workpiece 100 through the concrete structure after the step S101, and as can be seen from Figure 2, the diameter of bar portion 10 is less than the diameter of head 20.In the forward extrusion process, material flow direction is consistent with the mould moving direction.This step is finished in first station, and first station comprises that mould has: formpiston cushion block, jumper bar, jumper bar cover, sealing contract bar mould, locking type former cover, lock nut, former push rod and former tip-lever support.Also comprised raw material are cut off to cold-heading from the disk material before this step and process needed bar, promptly forming length is the cylindricality workpiece 100 of 76.5cm.
Step S102, the head 20 of backward extrusion workpiece 100 forms first guide cylinder 21 with the end away from bar portion 10 on head 20.Fig. 3 shows workpiece 100 through the concrete structure after the step S102, and as can be seen from Figure 3, the diameter of this guide cylinder 21 is less than the diameter of head 20.In the backward extrusion process, material flow direction is opposite with the mould moving direction.This step is finished in second station, and second station comprises that mould has: the formpiston cushion block, just rush to summit that bar, moulding are just dashed, pad, former push rod and former tip-lever support behind the straight-through mould, top stem casing, spring, lengthening former cover, former.
Step S103, the bar portion 10 of forward extrusion workpiece 100, with form first annular slopes 11 in bar portion 10 and form near head 20 than major diameter part 12 with away from the smaller diameter portion 13 of head 20.Fig. 4 shows workpiece 100 through the concrete structure after the step S103, this step is finished in the 3rd station, and the 3rd station comprises that mould has: formpiston cushion block, just rush to summit bar, NO.3 drift, the bar that contracts contract angle mould, locking type former cover, lock nut, former push rod and former tip-lever support.
Step S104, further forward extrusion bar portion 10 forms second annular slope 14 and second guide cylinder 15 with the smaller diameter portion 13 in bar portion 10, and the head of backward extrusion simultaneously 20 forms first spline 22 with the position in head 20 close first guide cylinder 21.Fig. 5 shows workpiece 100 through the concrete structure after the step S104, and as can be seen, first spline 22 comprises a plurality of spline tooths that are axially set on the workpiece 100, and described spline tooth evenly distributes.This step is finished in the 4th station, and the 4th station comprises that mould has: formpiston cushion block, just rush to summit bar, six flower undergauge formpistons, the bar that contracts contract angle mould, former push rod, former tip-lever support, locking type former cover and lock nut.
Step S105, backward extrusion bar portion 10 to form second spline 16 with head 20 position adjacent in bar portion 10, carries out jumping-up to workpiece 100 simultaneously, to form outward extending annular flange portion 23 at head 20.Fig. 6 shows workpiece 100 through the concrete structure after the step S105, and as can be seen, second spline 16 comprises a plurality of spline tooths that are axially set on the workpiece 100, and described spline tooth evenly distributes; Flange part 23 is between first spline 22 and second spline 16, and close first spline 22, and flange part 23 has aduncate radian.This step is finished in the 5th station, and the 5th station comprises that mould has: formpiston cushion block, just rush to summit bar, six flower undergauge formpistons, six flower undergauge angle moulds, the cloudy cover die of locking type, lock nut, former push rod and former tip-lever support.
Preferably, in implementation process of the present invention, described splined shaft adopts multi-station cold-heading equipment to process continuously, and a plurality of stations are processed a plurality of splined shafts simultaneously.Finish a step by each station workpiece 100 is processed continuously, and a plurality of station can process a plurality of splined shafts simultaneously, improve working (machining) efficiency whereby, per minute processing quantity is greater than 70.
The present invention adopts cold heading technique to produce splined shaft, and comprise that step has: the cylindricality workpiece 100 of predetermined length is cut in forward extrusion, to form bar portion 10 and head 20; Backward extrusion head 20 forms first guide cylinder 21 with the end away from bar portion 10 on head 20; Forward extrusion bar portion 10 is to form first annular slopes 11 and than major diameter part 12 and smaller diameter portion 13 in bar portion 10; Further forward extrusion bar portion 10, to form second annular slope 14 and second guide cylinder 15 in smaller diameter portion 13, the head of backward extrusion simultaneously 20 forms first spline 22 with the position in head 20 close first guide cylinder 21; Backward extrusion bar portion 10 to form second spline 16 with head 20 position adjacent in bar portion 10, carries out jumping-up to workpiece 100 simultaneously, to form annular flange portion 23 at head 20.In whole cold upsetting production process, do not have cutting and produce, avoided traditional handicraft to adopt that turning produces and spillage of material that cause, so the present invention save material more, cost of goods manufactured is low; Simultaneously, adopt continuous multistation to process, each station is finished one of them step, and a plurality of stations are processed a plurality of splined shafts simultaneously, and working (machining) efficiency is higher.Whereby, working (machining) efficiency of the present invention is higher, saves material more, and cost of goods manufactured is low.
As shown in Figure 7, in a specific embodiment of the present invention, manufacturing method of spline shaft by cold heading also comprises other follow-up flow processs, has both also comprised following flow process after the step S105:
Step S601 carries out turning processing to workpiece 100, and this step is mainly carried out turning to first guide cylinder 21, to reach the final products requirement.The cutting that this step turning processing is produced is few, can not cause the raising of waste of material and cost.
Step S602 carries out gear rolling processing to workpiece 100, forms the straight-tooth of a plurality of axial settings between first annular slope 11 and second annular slope 14, as shown in Figure 8.
Step S603 heat-treats workpiece 100, and this step is used to improve the mechanical performance of splined shaft, mainly improves its hardness number.
Also comprise after the described step S603 workpiece 100 is carried out surface treatment, more than the color zinc 12um of plating Cr VI, neutral salt spray test 48h non-corrosive, this step is mainly carried out unhairing bits and antirust processing to splined shaft.
The final structure of splined shaft after production is finished, also comprises processes such as transportation outside the factory, product inspection, outward appearance sorting, packing and delivery as shown in Figure 8.Manufacturing method of spline shaft by cold heading of the present invention needs problems such as expensive processing charges and fatigue strength are low in the time of can solving existing machinery Cutter Body Processing with Machining Center splined shaft.The present invention has working (machining) efficiency height (per minute is greater than 70), and cost of goods manufactured is low; Do not have cutting and produce, material is lossless; The forging mold wearing and tearing are slow, and the product size precision is easy to guarantee; The resultant metal streamline is continuous, characteristics such as fatigue strength height.
In sum, the present invention adopts cold heading technique to produce splined shaft, and comprise that step has: the cylindricality workpiece of predetermined length is cut in forward extrusion, to form bar portion and head; The described head of backward extrusion forms first guide cylinder with the end away from described bar portion on head; The described bar of forward extrusion portion is to form annular slope and than major diameter part and smaller diameter portion in described bar portion; The further described bar of forward extrusion portion, to form second annular slope and second guide cylinder in described smaller diameter portion, the described head of backward extrusion simultaneously forms first spline with the position in close first guide cylinder of described head; The described bar of backward extrusion portion to form second spline with the head position adjacent in described bar portion, carries out jumping-up to described workpiece simultaneously, forms annular flange portion at described head.In whole cold upsetting production process, do not have cutting and produce, avoided traditional handicraft to adopt that turning produces and spillage of material that cause, so the present invention save material more, cost of goods manufactured is low; Simultaneously, adopt continuous multistation to process, each station is finished one of them step, and a plurality of stations are processed a plurality of splined shafts simultaneously, and working (machining) efficiency is higher.Whereby, working (machining) efficiency of the present invention is higher, saves material more, and cost of goods manufactured is low.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. a manufacturing method of spline shaft by cold heading is characterized in that, this splined shaft has by cold-heading integrated bar portion and head, and this method may further comprise the steps:
The cylindricality workpiece of predetermined length is cut in A, forward extrusion, to form described bar portion and head;
B, the described head of backward extrusion form first guide cylinder with the end away from bar portion on described head;
C, the described bar of forward extrusion portion, with form first annular slope in described bar portion and form near described head than the major diameter part with away from the smaller diameter portion of described head;
D, the further described bar of forward extrusion portion, to form second annular slope and second guide cylinder in described smaller diameter portion, the described head of backward extrusion simultaneously forms first spline with the position in close first guide cylinder of described head;
E, the described bar of backward extrusion portion to form second spline with the head position adjacent in described bar portion, carry out jumping-up to described workpiece simultaneously, to form annular flange portion at described head.
2. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, also comprises after the described step e:
F, described workpiece is carried out turning processing;
G, described workpiece is carried out gear rolling processing, between described first annular slope and described second annular slope, to form the straight-tooth of a plurality of axial settings;
H, described workpiece is heat-treated.
3. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, also comprises after the described step H described workpiece is carried out the surface-treated step.
4. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, the diameter of the described bar portion that forms in the described steps A is less than the diameter of described head.
5. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, described first spline that forms in described step D and the described step e and second spline comprise a plurality of even distributions and be axially set in spline tooth on the described workpiece.
6. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, the described annular flange portion that forms in the described step e is between described first spline and second spline and near described first spline.
7. manufacturing method of spline shaft by cold heading according to claim 6 is characterized in that, the described flange part that forms in the described step e has aduncate radian.
8. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, described splined shaft adopts multi-station cold-heading equipment to process continuously, and a plurality of stations are processed a plurality of splined shafts simultaneously.
9. manufacturing method of spline shaft by cold heading according to claim 1 is characterized in that, described splined shaft is the spacer pin of door device in the limiting stopper assembly.
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| CN 200910238899 CN101767178B (en) | 2009-12-31 | 2009-12-31 | Manufacturing method of spline shaft by cold heading |
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| CN 200910238899 CN101767178B (en) | 2009-12-31 | 2009-12-31 | Manufacturing method of spline shaft by cold heading |
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| CN101767178B CN101767178B (en) | 2013-01-16 |
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| CN102189373A (en) * | 2010-12-30 | 2011-09-21 | 江苏创一精锻有限公司 | Integral forging near net shaping process for triple gear block, and prepared gear shaft |
| CN102463320A (en) * | 2010-11-11 | 2012-05-23 | 江苏威鹰机械有限公司 | Cold forging precise forming process for mechanical transmission gear shaft |
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| CN104209443A (en) * | 2014-08-15 | 2014-12-17 | 宾科汽车紧固件（昆山）有限公司 | Spline pin roll cold heading device and production process thereof |
| CN104368744A (en) * | 2014-12-01 | 2015-02-25 | 苏州工业园区新凯精密五金有限公司 | Cold heading forming technology of automobile door lock shaft and die structure for lock shaft forming |
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| CN114346156A (en) * | 2020-12-17 | 2022-04-15 | 韶能集团(韶关)华南精锻科技有限公司 | Forging method of shaft forging and blank making and finish forging die structure thereof |
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| CN102172656A (en) * | 2010-12-10 | 2011-09-07 | 深圳航空标准件有限公司 | Resonance rod cold heading manufacturing method |
| CN102172656B (en) * | 2010-12-10 | 2013-05-08 | 深圳航空标准件有限公司 | Resonance rod cold heading manufacturing method |
| CN102189373A (en) * | 2010-12-30 | 2011-09-21 | 江苏创一精锻有限公司 | Integral forging near net shaping process for triple gear block, and prepared gear shaft |
| CN102189373B (en) * | 2010-12-30 | 2013-04-03 | 江苏创一精锻有限公司 | Integral forging near net shaping process for triple gear block, and prepared gear shaft |
| CN103394869A (en) * | 2013-07-12 | 2013-11-20 | 江苏威鹰机械有限公司 | Precision forging plastic forming process of power take-off device flange shaft |
| CN104209443A (en) * | 2014-08-15 | 2014-12-17 | 宾科汽车紧固件（昆山）有限公司 | Spline pin roll cold heading device and production process thereof |
| CN104368744A (en) * | 2014-12-01 | 2015-02-25 | 苏州工业园区新凯精密五金有限公司 | Cold heading forming technology of automobile door lock shaft and die structure for lock shaft forming |
| CN104368744B (en) * | 2014-12-01 | 2016-05-04 | 苏州工业园区新凯精密五金有限公司 | A kind of cold upsetting forming die structure of car door lock shaft |
| CN106270340A (en) * | 2016-08-25 | 2017-01-04 | 苏州工业园区新凯精密五金有限公司 | A kind of cold-heading molding technique for manufacturing drive shaft and cold-heading module |
| CN110864103A (en) * | 2019-11-15 | 2020-03-06 | 玉环力恒动力机械有限公司 | Electric tool gear box transmission shaft and manufacturing process thereof |
| CN114346156A (en) * | 2020-12-17 | 2022-04-15 | 韶能集团(韶关)华南精锻科技有限公司 | Forging method of shaft forging and blank making and finish forging die structure thereof |
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