CN104791365A - Core shaft forging - Google Patents
Core shaft forging Download PDFInfo
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- CN104791365A CN104791365A CN201510217919.0A CN201510217919A CN104791365A CN 104791365 A CN104791365 A CN 104791365A CN 201510217919 A CN201510217919 A CN 201510217919A CN 104791365 A CN104791365 A CN 104791365A
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- flange plate
- taper
- forging
- angle
- mandrel
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Abstract
The invention relates to a core shaft forging, and aims at solving the technical problems of low precision of an existing driving shaft forging and the like. The core shaft forging comprises a forging body, a cone-shaped body, an annular groove, a round plane, a flange plate and a disc body, wherein four tooth-like bulge parts which are evenly distributed and located on the flange plate are arranged on the circumference of the disc body; each tooth-like bulge part is in a blunt end form; the tooth-like bulge parts respectively extend outwards and do not exceed the outer side of the circumference of the flange plate; the disc body is connected with the flange plate through an inclined transition part; a cylindrical body which is arranged coaxially with the flange plate is arranged at one side, far away from the cone-shaped body, of the flange plate; and a tapered blind hole which extends towards the flange plate is formed in the inner side of the circumference of the cylindrical part. The core shaft forging has the advantages that the 1 the core shaft forging is relatively reasonable in design, and high in accuracy, and the quality of a core shaft is easy to keep; and 2 the core shaft forging is good in stability, simple in structure and easy to manufacture.
Description
Technical field
The invention belongs to technical field of automobile, particularly relate to a kind of mandrel forging.
Background technique
Mandrel is the vital part on automobile, be mainly used in the transmission of automobile variable speed mechanism, it requires higher surface hardness and center toughness, but due to the particularity of its shape and the significance of usability thereof, thus the difficulty of its processing is added, common automobile mandrel is formed after finish turning primarily of mandrel forging, so the quality of mandrel forging determines the quality of the automobile mandrel after processing to a certain extent, but common mandrel forging also exists: structural strength is lower, precision is low, poor stability, thus the quality easily reducing the driving shaft after processing.
In order to solve prior art Problems existing, people have carried out long-term exploration, propose solution miscellaneous.Such as, Chinese patent literature discloses a kind of hub-bearing unit fine forge piece, [application number: 201320390270.9], comprise the bearing unit body in step shaft-like, be provided with intermediate incline between the lower semiaxis of bearing unit body and step surface, all sides of described lower semiaxis bottom are evenly provided with four flange part; The side of described lower semiaxis, be wherein provided with projection between two flange part.The described projection side of being body, is provided with fillet between the upper side of projection and left and right side.
Above-mentioned scheme improves the subproblem of prior art to a certain extent, but, also at least there is following defect in the program: waste of material is serious and manufacture cost is higher, in addition, although be overall forging structure, be unfavorable for follow-up locating and machining, cause the accuracy of manufacturing of product to reduce, particularly the technical problem of and poor stability low for mandrel forging precision, reduces end product quality so virtually.
Summary of the invention
The object of the invention is for the problems referred to above, provide a kind of design more reasonable, the mandrel forging of good stability.
For achieving the above object, present invention employs following technical proposal: this mandrel forging, comprise forging body, it is characterized in that, described forging body comprises conically taper, some circular grooves from up to down set gradually are provided with in taper outer circumferential, described circular groove is enlarging shape, and the width of rebate size of described circular groove is greater than slot bottom width size, the little head end of described taper has circular flat, the stub end of described taper is connected with the flange plate be coaxially connected with taper, the side that described flange plate is connected with taper is provided with the concentric discoid body arranged with flange plate, and described discoid body be circumferentially with four be uniformly distributed setting and the detent projection portion be positioned on flange plate, each detent projection portion is all in blunt nosed shape, and described detent projection portion stretches out respectively and does not exceed flange plate outer circumferential, described discoid body is connected by slope transitions with between flange plate, described flange plate is provided with away from the side of taper the cylinder coaxially arranged with flange plate, described cylinder week forms the tapered blind hole extended to flange plate to the inside.Adopt the mandrel forging of said structure to have good stability, precision is high, and is reserved with circular groove and is convenient to following process.
In above-mentioned mandrel forging, described detent projection portion is rectangular, and the end in described detent projection portion has arc ending portion, and this arc ending portion is connected by the first curved transition sections with between flange plate.
In above-mentioned mandrel forging, described tapered blind hole extends internally and axially exceeds flange plate side.
In above-mentioned mandrel forging, the cross section of described circular groove is curved.
Alternatively preferred version, in above-mentioned mandrel forging, the cross section of described circular groove is in the isosceles trapezoid with long parallel edges and short parallel edges, and the lenth ratio of described short parallel edges and long parallel edges is 1:2-2.5.
In above-mentioned mandrel forging, the quantity of described circular groove is two and evenly arranges respectively.
In above-mentioned mandrel forging, between the end face of the conical surface of described taper and the little head end of taper, form the first angle, and the size of the first described angle is 80 °.
In above-mentioned mandrel forging, between described slope transitions and discoid body, form the second angle, and the size of the second described angle is 45 °.
In above-mentioned mandrel forging, between the inner conical surface of described tapered blind hole and cylinder end face, form the 3rd angle, and the size of the 3rd described angle is 85 °.
In above-mentioned mandrel forging, flush with outside discoid body outside described detent projection portion, and be provided with the second curved transition sections between described discoid body and taper.
Compared with prior art, the advantage of this mandrel forging is: 1, design is more reasonable, and precision is high, is easy to the quality keeping mandrel; 2, good stability, structure is simple and be easy to manufacture.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one provided by the invention.
Fig. 2 is the structural representation at another visual angle of embodiment one provided by the invention.
Fig. 3 is the structural representation of embodiment two provided by the invention.
In figure, forging body 1, taper 11, circular groove 12, circular flat 13, flange plate 2, discoid body 21, detent projection portion 22, arc ending portion 221, first curved transition sections 222, slope transitions 23, cylinder 24, tapered blind hole 25, second curved transition sections 26, first angle α 1, second angle α 2, the 3rd angle α 3.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Embodiment one
As shown in Figure 1-2, this mandrel forging, comprise forging body 1, forging body 1 comprises conically taper 11, some circular grooves 12 from up to down set gradually are provided with in taper 11 outer circumferential, described circular groove 12 is in enlarging shape, and the width of rebate size of circular groove 12 is greater than slot bottom width size, the little head end of taper 11 has circular flat 13, the stub end of taper 11 is connected with the flange plate 2 that be connected coaxial with taper 11, the side that flange plate 2 is connected with taper 11 is provided with the concentric discoid body 21 arranged with flange plate 2, and discoid body 21 be circumferentially with four be uniformly distributed setting and the detent projection portion 22 be positioned on flange plate 2, each detent projection portion 22 is all in blunt nosed shape, and detent projection portion 22 does not exceed flange plate 2 outer circumferential respectively to extension, be connected by slope transitions 23 between discoid body 21 with flange plate 2, flange plate 2 is provided with the coaxial cylinder 24 arranged with flange plate 2 away from the side of taper 11, cylinder forms the tapered blind hole 25 extended to flange plate 2 for 24 weeks to the inside, the mandrel forging 1 of this structure is adopted to have good stability, precision is high, and be reserved with circular groove 12 and be convenient to following process.
Particularly, the detent projection portion 22 in the present embodiment is rectangular, and the end in detent projection portion 22 has arc ending portion 221, and this arc ending portion 221 is connected by the first curved transition sections 222 with between flange plate 2.Here flush with outside discoid body 21 outside detent projection portion 22, and between discoid body 21 and taper 11, be provided with the second curved transition sections 26.Wherein, tapered blind hole 25 here extends internally and axially exceeds flange plate 2 side.Preferably, the cross section of circular groove 12 is here curved, can be convenient to like this carry out finish turning to forging when the later stage carries out fine finishing, convenient processing, and the quantity of circular groove 12 is two and evenly arranges respectively.
Further, between the end face of the conical surface of taper 11 here and the little head end of taper 11, form the first angle α 1, and the size of the first angle α 1 is 80 °.Form the second angle α 2 between slope transitions 23 and discoid body 21, and the size of the second angle α 2 is 45 °.Form the 3rd angle α 3 between the inner conical surface of tapered blind hole 25 and cylinder 24 end face, and the size of the 3rd angle α 3 is 85 °.
Embodiment two
As shown in Figure 3, the structure of the present embodiment, principle and implementation step and embodiment one similar, different place is, the cross section of the circular groove 12 in the present embodiment is in the isosceles trapezoid with long parallel edges and short parallel edges, and the lenth ratio of short parallel edges and long parallel edges is 1:2-2.5.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the term such as forging body 1, taper 11, circular groove 12, circular flat 13, flange plate 2, discoid body 21, detent projection portion 22, arc ending portion 221, first curved transition sections 222, slope transitions 23, cylinder 24, tapered blind hole 25, second curved transition sections 26, first angle α 1, second angle α 2, the 3rd angle α 3 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (10)
1. a mandrel forging, comprise forging body (1), it is characterized in that, described forging body (1) comprises conically taper (11), some circular grooves (12) from up to down set gradually are provided with in taper (11) outer circumferential, described circular groove (12) is in enlarging shape, and the width of rebate size of described circular groove (12) is greater than slot bottom width size, the little head end of described taper (11) has circular flat (13), the stub end of described taper (11) is connected with the flange plate (2) that be connected coaxial with taper (11), the side that described flange plate (2) is connected with taper (11) is provided with the concentric discoid body (21) arranged with flange plate (2), and described discoid body (21) be circumferentially with four be uniformly distributed setting and the detent projection portion (22) be positioned on flange plate (2), each detent projection portion (22) is all in blunt nosed shape, and described detent projection portion (22) does not exceed flange plate (2) outer circumferential respectively to extension, described discoid body (21) is connected by slope transitions (23) with between flange plate (2), described flange plate (2) is provided with the coaxial cylinder (24) arranged with flange plate (2) away from the side of taper (11), described cylinder (24) week forms the tapered blind hole (25) extended to flange plate (2) to the inside.
2. mandrel forging according to claim 1, it is characterized in that, described detent projection portion (22) is rectangular, and the end in described detent projection portion (22) has arc ending portion (221), and be connected by the first curved transition sections (222) between this arc ending portion (221) with flange plate (2).
3. mandrel forging according to claim 2, is characterized in that, described tapered blind hole (25) extends internally and axially exceeds flange plate (2) side.
4. the mandrel forging according to claim 1 or 2 or 3, is characterized in that, the cross section of described circular groove (12) is curved.
5. the mandrel forging according to claim 1 or 2 or 3, it is characterized in that, the cross section of described circular groove (12) is in the isosceles trapezoid with long parallel edges and short parallel edges, and the lenth ratio of described short parallel edges and long parallel edges is 1:(2-2.5).
6. mandrel forging according to claim 1, is characterized in that, the quantity of described circular groove (12) is two and evenly arranges respectively.
7. mandrel forging according to claim 1, it is characterized in that, form the first angle (α 1) between the end face of the conical surface of described taper (11) and the little head end of taper (11), and the size of the first described angle (α 1) is 80 °.
8. mandrel forging according to claim 1, it is characterized in that, form the second angle (α 2) between described slope transitions (23) and discoid body (21), and the size of the second described angle (α 2) is 45 °.
9. mandrel forging according to claim 1, it is characterized in that, form the 3rd angle (α 3) between the inner conical surface of described tapered blind hole (25) and cylinder (24) end face, and the size of described the 3rd angle (α 3) is 85 °.
10. mandrel forging according to claim 1, it is characterized in that, described outside, detent projection portion (22) flushes with discoid body (21) outside, and is provided with the second curved transition sections (26) between described discoid body (21) and taper (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217919.0A CN104791365A (en) | 2015-04-29 | 2015-04-29 | Core shaft forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217919.0A CN104791365A (en) | 2015-04-29 | 2015-04-29 | Core shaft forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104791365A true CN104791365A (en) | 2015-07-22 |
Family
ID=53556430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217919.0A Pending CN104791365A (en) | 2015-04-29 | 2015-04-29 | Core shaft forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104791365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035776A (en) * | 2017-05-04 | 2017-08-11 | 泰州市众擎金属制品有限公司 | A kind of inner flange |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000002251A (en) * | 1998-06-12 | 2000-01-07 | Nippon Seiko Kk | Conical roller bearing |
| JP2010058735A (en) * | 2008-09-05 | 2010-03-18 | Ntn Corp | Wheel bearing device and method for manufacturing hub ring of wheel bearing device |
| CN103878544A (en) * | 2014-02-28 | 2014-06-25 | 济南中森机械制造有限公司 | High-precision spindle machining process |
| CN104061386A (en) * | 2014-06-17 | 2014-09-24 | 德清恒丰机械有限公司 | Automotive flange forging piece |
| CN104132053A (en) * | 2014-07-22 | 2014-11-05 | 德清德曼汽车零部件有限公司 | Automobile wheel hub mandrel forged piece blank |
| CN104295823A (en) * | 2014-10-21 | 2015-01-21 | 德清恒丰机械有限公司 | Vehicular interior flange forging |
| CN204628247U (en) * | 2015-04-29 | 2015-09-09 | 德清德曼汽车零部件有限公司 | Mandrel forging |
-
2015
- 2015-04-29 CN CN201510217919.0A patent/CN104791365A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000002251A (en) * | 1998-06-12 | 2000-01-07 | Nippon Seiko Kk | Conical roller bearing |
| JP2010058735A (en) * | 2008-09-05 | 2010-03-18 | Ntn Corp | Wheel bearing device and method for manufacturing hub ring of wheel bearing device |
| CN103878544A (en) * | 2014-02-28 | 2014-06-25 | 济南中森机械制造有限公司 | High-precision spindle machining process |
| CN104061386A (en) * | 2014-06-17 | 2014-09-24 | 德清恒丰机械有限公司 | Automotive flange forging piece |
| CN104132053A (en) * | 2014-07-22 | 2014-11-05 | 德清德曼汽车零部件有限公司 | Automobile wheel hub mandrel forged piece blank |
| CN104295823A (en) * | 2014-10-21 | 2015-01-21 | 德清恒丰机械有限公司 | Vehicular interior flange forging |
| CN204628247U (en) * | 2015-04-29 | 2015-09-09 | 德清德曼汽车零部件有限公司 | Mandrel forging |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035776A (en) * | 2017-05-04 | 2017-08-11 | 泰州市众擎金属制品有限公司 | A kind of inner flange |
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Application publication date: 20150722 |
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| WD01 | Invention patent application deemed withdrawn after publication |