CN105478650B - A kind of method of flange plate bolt head performing hot-heading forming - Google Patents
A kind of method of flange plate bolt head performing hot-heading forming Download PDFInfo
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- CN105478650B CN105478650B CN201510913281.4A CN201510913281A CN105478650B CN 105478650 B CN105478650 B CN 105478650B CN 201510913281 A CN201510913281 A CN 201510913281A CN 105478650 B CN105478650 B CN 105478650B
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- Prior art keywords
- flange plate
- plate bolt
- bolt head
- upsetting
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of method of flange plate bolt head performing hot-heading forming, raw material are lathed step shape by this method first；Material diameter car as low as diameter phi=S δ α of the side of head six will be molded again, wherein, S is six side's opposite side sizes, δ is material heat expansion amount of contraction, α is used upper and lower die holder dislocation value during hot upsetting, Che little Hou formed the small diameter portion of six sides, connection intermediate incline and raw material on the small diameter portion of non-car；The heating-up temperature of six side's small diameter portions during hot upsetting is finally adjusted higher than the heating-up temperature for needing hot upsetting to form flange portions on raw material, you can.With Milling Speed is fast, surface quality is good, the cycle is short, high efficiency, cost are low and will not be produced in the intersection of six sides and ring flange fold, product and can upsetting is full the characteristics of.
Description
Technical field
The invention belongs to field of mechanical technique, and in particular to a kind of method of flange plate bolt head performing hot-heading forming.
Background technology
At present, it is molded for the side of the head six flange plate bolt head smaller than gauge diameter, because six square chi cun compare bar portion
Diameter is small, and technique sorting is again bigger than gauge diameter, and six side's moulds can be the part bigger than six side's opposite side during causing upsetting
Material down scrapes generation wrinkle.With at ring flange material it is swollen thick, eventually produce folding in the junction of six sides and ring flange
It is folded, the side of head six may be twisted off when assembling twisting.Therefore, frequently with solution method be selection it is close with ring flange diameter
Round bar turning, the side of milling six, or head upsetting is big, then turning, the side of milling six from the material of minor diameter, but still
There is Milling Speed is slow, surface quality is bad, the cycle is long, benefit is low, cost is high, it is difficult to the problem of meeting to produce in enormous quantities.
The content of the invention
There is provided that a kind of surface quality is good, the cycle is short, high efficiency, cost are low it is an object of the invention to overcome aforementioned difficulties
And will not be in the full flange plate bolt head performing hot-heading forming of the intersection of six sides and ring flange generation folding, product and can upsetting
Method.
Raw material are lathed step by a kind of method of flange plate bolt head performing hot-heading forming of the present invention, this method first
Shape；Again by material diameter car as low as diameter phi=S- δ-α of the shaping side of head six wherein, S is six side's opposite side sizes, δ is material
Thermal expansion amount of contraction, α be hot upsetting during used upper and lower die holder dislocation value, Che little Hou formed six sides small diameter portion,
The small diameter portion of non-car on the intermediate incline and raw material of connection；Finally adjust six side's small diameter portions during hot upsetting
Heating-up temperature is higher than the heating-up temperature for needing hot upsetting to form flange portions on raw material, you can.
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：During the hot upsetting it is used it is upper,
Die shoe dislocation value is 0.1-0.2mm.
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：The Workpiece Turning of the side of head six will be molded
To diameter phi=S- δ-α, also the angle between intermediate incline and center line can be pressed 30 ° or 45 ° of turning.
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：The Workpiece Turning of the side of head six will be molded
, can also be by intermediate incline and the wedge angle rounding of the cylindrical formation of the small raw material of non-car, chamfering radius 1 to diameter phi=S- δ-α
±0.2mm。
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：The Workpiece Turning of the side of head six will be molded
To diameter phi=S- δ-α, by the small diameter portion of six sides and the junction of intermediate incline, i.e. transition position is lathed radius and is
0.6-1mm circular arc, the transition position roughness are not more than 3.2um.
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：Six side portions during the hot upsetting of regulation
Point heating-up temperature be higher than the specific method of heating-up temperature of flange portions：The spacing of induction coil is adjusted, will be heated small straight
The spacing of path portion induction coil is turned down, and the spacing for heating diameter portion induction coil is tuned up.
A kind of method of above-mentioned flange plate bolt head performing hot-heading forming, wherein：Six side portions during the hot upsetting of regulation
Point heating-up temperature be higher than the specific method of heating-up temperature of flange portions：Heating apparatus temperature is adjusted to material and deformed
The middle upper limit of temperature, after the temperature of diameter portion reaches design temperature, diameter portion is removed into induction coil, only heated small
Diameter portion；When the temperature of small diameter portion is down to after lower limit the upsetting system that carries out again close to the middle upper limit, the temperature of diameter portion.
The present invention compared with prior art, has obvious beneficial effect, as can be known from the above technical solutions：By flange plate bolt
The material diameter car for being molded the side of head six is small, it is contemplated that six side's opposite side size S, material heat expansion amount of contraction δ and suitably upper and lower
Die holder misplaces, and is avoided that the intersection of six sides and ring flange produces folding, is easily screwed so as to be easily caused six sides when assembling twisting
Fall；
Angle between turning intermediate incline and center line can prevent when the side of volume ratio six of former material truck fraction is molded
When material volume needed for part is more smaller, material when flowing on six sides toward producing folding during shaping；Wedge angle rounding is again
Sharp corner during performing hot-heading forming can be prevented and form ring-shaped groove；And transition position, if knife phenomenon, knife vestige will not after hot upsetting
Elimination can influence product roughness；
It is made up of because flange plate bolt is molded head two parts of ring flange and six sides, simply six side's moulding sections
Material diameter turning is small, two kinds of different diameters will occurs, and during hot upsetting, heating means routinely are small after heating
The temperature of diameter portion can be lower than the temperature of diameter portion, and material easily flows toward at the ring flange on diameter portion, and six
Side is not easy upsetting and expired, and therefore, the heating-up temperature of six side's small diameter portions during hot upsetting is heightened in needing hot upsetting shape on raw material
Into the heating-up temperature of flange portions, make the material temperature of shaped flange disk lower, flowing is relatively slow, prevents six side's materials past
Flowed on ring flange, it can be ensured that product upsetting is full；
Each technical step is complemented each other, and folding, product will not be produced again in the intersection of six sides and ring flange so as to reach
The full purpose of energy upsetting, has the characteristics of surface quality is good, the cycle is short, high efficiency and cost are low.
Brief description of the drawings
Fig. 1 is parts to be processed front view；
Fig. 2 is the side's materials appearance schematic diagram of parts to be processed turning six.
Marked in figure：
1st, six square end face, 2, part flange face, 3, transition position, 4, wedge angle, 5, angle, 6, intermediate incline, 7, center line, 8,
Raw material are cylindrical.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail.
As shown in Figure 1-2, a six square flange valve snail bolts are arbitrarily chosen, its master data is：Material 42CrMo（Forging temperature
It is 800-1150 DEG C to spend scope）, six side's opposite side size S=12mm, gauge diameter d=16mm；
First, raw material are lathed step shape；
Secondly, turning diameter φ is calculated according to six side's opposite side sizes, material heat expansion amount of contraction and upper and lower die holder dislocation value
=11.7（S12-δ0.15-0.15=11.7）And the stores van for being molded the side of head six is small, Che little Hou forms the minor diameter of six sides
Divide, the small diameter portion of non-car on the intermediate incline and raw material of connection；
By the angle 5 between intermediate incline 6 and center line 7 by 30 ° of turning and by intermediate incline 6 and the small raw material of non-car
Cylindrical 8 roundings of wedge angle 4 formed, chamfering radius 0.8mm；
By the small diameter portion of six sides and the junction of intermediate incline, i.e. transition position is lathed the circular arc that radius is 0.6mm,
The transition position is not allow for obvious tool marks, roughness 1.6um；
Finally, whole head materials are partially placed into induction coil and heated, in heating process, when the temperature of diameter portion
When degree reaches about 1100 DEG C, bar moves a certain distance outside toward induction coil, only heats small diameter portion, makes its temperature close to 1100
DEG C, for diameter portion because moving on to outside induction coil, temperature is reduced to 900 DEG C or so, carries out upsetting system, ensures that upsetting temperature is requiring
In the range of, while make temperature difference as big as possible, you can.
By the angle 5 between intermediate incline in the above method 6 and center line 7 by 40 ° of turning and by intermediate incline 6 and non-car
The wedge angle 4 that small raw material cylindrical 8 are formed press radius 1mm or 1.2mm rounding, or by transition position be lathed radius be 0.8mm or
1mm circular arc, other operations are constant, can still realize the purpose of performing hot-heading forming of the present invention.
All it is entirely capable of meeting with the spare part outside measurement of the hot upsetting of method provided by the present invention, metallographic, torsion, surface quality
Product design requirement, efficiency high, it is adapted to produce in enormous quantities.
The present invention ten two tooth flange plate bolts smaller than bar to head side, 12 angle flange valve snail bolts, ten angle flange valve snails
Bolt, cubic flange plate bolt etc. are all suitable for.
The above described is only a preferred embodiment of the present invention, not making any formal limitation to the present invention, appoint
Without departing from technical solution of the present invention content, what the technical spirit according to the present invention was made to above example any simply repaiies for what
Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (6)
- A kind of 1. method of flange plate bolt head performing hot-heading forming, it is characterised in that：Raw material are lathed step shape first； Material diameter car as low as diameter phi=S- δ-α of the side of head six will be molded again, wherein, S is six side's opposite side sizes, δ is that material heat is swollen Swollen amount of contraction, α are used upper and lower die holder dislocation value during hot upsetting, and Che little Hou forms the small diameter portion of six sides, connection Intermediate incline and raw material on the small diameter portion of non-car；Finally adjust the heating of six side's small diameter portions during hot upsetting Temperature is higher than the heating-up temperature for needing hot upsetting to form flange portions on raw material, you can.
- A kind of 2. method of flange plate bolt head as claimed in claim 1 performing hot-heading forming, it is characterised in that：The hot upsetting Upper and lower die holder dislocation value used in journey is 0.1-0.2mm.
- A kind of 3. method of flange plate bolt head as claimed in claim 1 or 2 performing hot-heading forming, it is characterised in that：Will shaping Angle between intermediate incline and center line is pressed 30 ° or 45 ° of cars by the Workpiece Turning of the side of head six to after diameter phi=S- δ-α Cut.
- A kind of 4. method of flange plate bolt head as claimed in claim 1 or 2 performing hot-heading forming, it is characterised in that：Will shaping The Workpiece Turning of the side of head six falls the wedge angle of the cylindrical formation of the intermediate incline raw material small with non-car to after diameter phi=S- δ-α Circle, chamfering radius is 1 ± 0.2mm.
- A kind of 5. method of flange plate bolt head as claimed in claim 1 or 2 performing hot-heading forming, it is characterised in that：Will shaping The Workpiece Turning of the side of head six is to after diameter phi=S- δ-α, by the small diameter portion of six sides and the junction of intermediate incline, i.e., The place of crossing is lathed the circular arc that radius is 0.6-1mm, and the transition position roughness is not more than 3.2um.
- A kind of 6. method of flange plate bolt head as claimed in claim 1 or 2 performing hot-heading forming, it is characterised in that：The tune The heating-up temperature for saving six side parts during hot upsetting is higher than the specific method of the heating-up temperature of flange portions：Adjust induction coil Spacing, by heat small diameter portion induction coil spacing turn down, by heat diameter portion induction coil spacing tune up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510913281.4A CN105478650B (en) | 2015-12-11 | 2015-12-11 | A kind of method of flange plate bolt head performing hot-heading forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510913281.4A CN105478650B (en) | 2015-12-11 | 2015-12-11 | A kind of method of flange plate bolt head performing hot-heading forming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105478650A CN105478650A (en) | 2016-04-13 |
| CN105478650B true CN105478650B (en) | 2018-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510913281.4A Active CN105478650B (en) | 2015-12-11 | 2015-12-11 | A kind of method of flange plate bolt head performing hot-heading forming |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983895A (en) * | 2017-11-29 | 2018-05-04 | 中国航空工业标准件制造有限责任公司 | The performing hot-heading forming method of head super thick flange bolt |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000218341A (en) * | 1999-01-28 | 2000-08-08 | Izumi Kogyo Kk | Bolt manufacturing method |
| ATE453470T1 (en) * | 2008-02-12 | 2010-01-15 | Yu-Sheng Tseng | METHOD FOR COLD FORGING A HIGH STRENGTH FASTENER FROM AUSTENITIC SERIES 300 MATERIAL |
| KR101026728B1 (en) * | 2008-10-28 | 2011-04-08 | 박증용 | Forming device of adjust bolt |
| CN101571156A (en) * | 2009-06-19 | 2009-11-04 | 葛国清 | Machining process of special screw with big thread and small hexagon head |
| RU2489224C1 (en) * | 2012-01-10 | 2013-08-10 | Открытое акционерное общество "Белебеевский завод "Автонормаль" | Method of making bolts with flange |
| CN102601589A (en) * | 2012-03-29 | 2012-07-25 | 苏州新凌电炉有限公司 | Process for manufacturing quincuncial dowel screws |
| CN102764843B (en) * | 2012-08-15 | 2016-03-02 | 浙江中航来宝精工科技有限公司 | The processing method of bolt and mould therefor |
| CN104148573A (en) * | 2014-06-25 | 2014-11-19 | 贵州航天精工制造有限公司 | Bolt hexagonal flange surface machining method and device |
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