CN101767178B - Manufacturing method of spline shaft by cold heading - Google Patents
Manufacturing method of spline shaft by cold heading Download PDFInfo
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- CN101767178B CN101767178B CN 200910238899 CN200910238899A CN101767178B CN 101767178 B CN101767178 B CN 101767178B CN 200910238899 CN200910238899 CN 200910238899 CN 200910238899 A CN200910238899 A CN 200910238899A CN 101767178 B CN101767178 B CN 101767178B
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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 dumb when switch gate and/or the generation abnormal sound, even can't open or close by opposite house, and the sealed limit device can be avoided the generation of the problems referred to above.
In sealed limit device assembly, spacer pin is its core component.And being subjected to the restriction of stop assembly structure and function, the sealed limit device need adopt splined shaft as its spacer pin.Spline shaft structure is special, required precision is higher, the manufacturing process of existing splined shaft is machining center production, its existing technological process is: will cut bar and deliver to machining center and carry out turning, milling and annular knurl, then the packing of product is carried out in heat treatment and surface treatment (oiling) at last.Yet, machining center equipment price expensive (approximately RMB100 ten thousand), and working (machining) efficiency low (processing quantity was about 100 in per 8 hours), simultaneously because adopting machining, can produce more waste material, 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 in actual use, so be necessary to be improved.
Summary of the invention
For 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, more save material, 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 section and head, and the method may further comprise the steps:
The cylindricality workpiece of predetermined length is cut in A, forward extrusion, to form described bar section and head;
B, the described head of backward extrusion form the first guide cylinder with the end away from bar section on described head;
C, the described bar of forward extrusion section are to form the first annular slope and to form larger diameter part near described head in described bar section
Smaller diameter portion away from described head;
D, the further described bar of forward extrusion section, to form the second annular slope and the second guide cylinder in described smaller diameter portion, the described head of simultaneously backward extrusion forms the first spline with the position in close the first guide cylinder of described head;
E, the described bar of backward extrusion section form the second spline with the position adjacent with head in described bar section, simultaneously described workpiece are carried out jumping-up, 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, described workpiece head the first guide cylinder cylindrical is carried out turning process to reach the final products requirement;
G, described workpiece is carried out gear rolling processing, between described the first annular slope and described the 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 section 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 the first spline that forms in described step D and the described step e and the 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 the first spline and the second spline and near described the 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 section and head; The described head of backward extrusion forms the first guide cylinder with the end away from described bar section on head; The described bar of forward extrusion section is to form annular slope and to form larger diameter part and smaller diameter portion in described bar section; The further described bar of forward extrusion section, to form the second annular slope and the second guide cylinder in described smaller diameter portion, the described head of simultaneously backward extrusion forms the first spline with the position in close the first guide cylinder of described head; The described bar of backward extrusion section forms the second spline with the position adjacent with head in described bar section, simultaneously described workpiece is carried out jumping-up, forms annular flange portion at described head.In whole cold upsetting production process, produce without cutting, 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, more saves material, 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, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit 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 section 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 section 10 and head 20.Preferably, workpiece 100 is 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 section 10 is less than the diameter of head 20.In the forward extrusion process, material flow direction is consistent with the mold movement direction.This step is finished in the first station, and the first station comprises that mould has: formpiston cushion block, jumper bar, jumper bar cover, sealing contracting bar mould, locking type former cover, lock nut, former push rod and former tip-lever support.Also comprised raw material are cut off as cold-heading from the disk material before this step and process needed bar, namely forming length is the cylindricality workpiece 100 of 76.5cm.
Step S102, the head 20 of backward extrusion workpiece 100 forms the first guide cylinder 21 with the end away from bar section 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 and mold movement opposite direction.This step is finished in the second station, and the second station comprises that mould has: the formpiston cushion block, just rush to summit that bar, moulding just rush, 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 section 10 of forward extrusion workpiece 100 is to form the first annular slopes 11 and to form near the larger diameter part 12 of head 20 with away from the smaller diameter portion 13 of head 20 in bar section 10.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, contracting bar contracting angle mould, locking type former cover, lock nut, former push rod and former tip-lever support.
Step S104, further forward extrusion bar section 10 forms the second annular slope 14 and the second guide cylinder 15 with the smaller diameter portion 13 in bar section 10, and simultaneously backward extrusion head 20 forms the first spline 22 with the position in head 20 close the first guide cylinder 21.Fig. 5 shows workpiece 100 through the concrete structure after the step S104, can find out, the 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: the formpiston cushion block, just rush to summit bar, six flower undergauge formpistons, contracting bar contracting angle mould, former push rod, former tip-lever support, locking type former overlaps and lock nut.
Step S105, backward extrusion bar section 10 forms the second spline 16 with position adjacent with head 20 in bar section 10, simultaneously workpiece 100 is carried out jumping-up, to form outward extending annular flange portion 23 at head 20.Fig. 6 shows workpiece 100 through the concrete structure after the step S105, can find out, the 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 the first spline 22 and the second spline 16, and close the 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 whereby working (machining) efficiency, 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 section 10 and head 20; Backward extrusion head 20 forms the first guide cylinder 21 with the end away from bar section 10 on head 20; Forward extrusion bar section 10 is to form the first annular slope 11 and larger diameter part 12 and smaller diameter portion 13 in bar section 10; Further forward extrusion bar section 10, to form the second annular slope 14 and the second guide cylinder 15 in smaller diameter portion 13, simultaneously backward extrusion head 20 forms the first spline 22 with the position in head 20 close the first guide cylinder 21; Backward extrusion bar section 10 forms the second spline 16 with position adjacent with head 20 in bar section 10, simultaneously workpiece 100 is carried out jumping-up, to form annular flange portion 23 at head 20.In whole cold upsetting production process, produce without cutting, 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, more saves material, 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 the first guide cylinder 21, to reach the final products requirement.The cutting that this step turning machining produces 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 the first annular slope 11 and the second annular slope 14, as shown in Figure 8.
Step S603 heat-treats workpiece 100, and this step is used for improving 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 the 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 the 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 high (per minute is greater than 70), and cost of goods manufactured is low; Produce without cutting, 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, the fatigue strength high.
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 section and head; The described head of backward extrusion forms the first guide cylinder with the end away from described bar section on head; The described bar of forward extrusion section is to form annular slope and larger diameter part and smaller diameter portion in described bar section; The further described bar of forward extrusion section, to form the second annular slope and the second guide cylinder in described smaller diameter portion, the described head of simultaneously backward extrusion forms the first spline with the position in close the first guide cylinder of described head; The described bar of backward extrusion section forms the second spline with the position adjacent with head in described bar section, simultaneously described workpiece is carried out jumping-up, forms annular flange portion at described head.In whole cold upsetting production process, produce without cutting, 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, more saves material, and cost of goods manufactured is low.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, 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 section and head, and the method may further comprise the steps:
The cylindricality workpiece of predetermined length is cut in A, forward extrusion, to form described bar section and head;
B, the described head of backward extrusion form the first guide cylinder with the end away from bar section on described head;
C, the described bar of forward extrusion section are to form the first annular slope and to form near the larger diameter part of described head with away from the smaller diameter portion of described head in described bar section;
D, the further described bar of forward extrusion section, to form the second annular slope and the second guide cylinder in described smaller diameter portion, the described head of simultaneously backward extrusion forms the first spline with the position in close the first guide cylinder of described head;
E, the described bar of backward extrusion section form the second spline with the position adjacent with head in described bar section, simultaneously described workpiece are carried out jumping-up, 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 first guide cylinder of described workpiece is carried out turning processing;
G, described workpiece is carried out gear rolling processing, between described the first annular slope and described the 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 2 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 section 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 the first spline that forms in described step D and the described step e and the 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 the first spline and the second spline and near described the 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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| CN101767178A CN101767178A (en) | 2010-07-07 |
| CN101767178B true CN101767178B (en) | 2013-01-16 |
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Families Citing this family (11)
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| 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 |
| 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 |
| 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 |
| CN104209443B (en) * | 2014-08-15 | 2017-01-18 | 宾科汽车紧固件（昆山）有限公司 | Spline pin roll cold heading device and production process thereof |
| 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 |
| CN114688050A (en) * | 2020-12-25 | 2022-07-01 | 义乌市鼎邦文体用品有限公司 | Combined fan device |
| CN112692524B (en) * | 2021-01-08 | 2022-06-10 | 浙江汇丰汽车零部件股份有限公司 | Guide pin production process |
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