CN110369495A - A kind of pre- sub-material concentration molding cross wedge rolling technique - Google Patents
A kind of pre- sub-material concentration molding cross wedge rolling technique Download PDFInfo
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- CN110369495A CN110369495A CN201910669057.3A CN201910669057A CN110369495A CN 110369495 A CN110369495 A CN 110369495A CN 201910669057 A CN201910669057 A CN 201910669057A CN 110369495 A CN110369495 A CN 110369495A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/028—Variable-width rolls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Metal Rolling (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of pre- sub-materials to concentrate molding cross wedge rolling technique, the processing step of the cross wedge rolling forming technique includes: that bar is heated to after rolling temperature and is put into mold material waiting section --- mold drives bar rotation to start to roll under the action of starting milling train mold starts to be rotated in frictional force under the driving of milling train --- the pre- sub-material section wedging of diameter-2 --- the pre- sub-material section broadening of diameter-2 --- the pre- sub-material section molding of diameter-2 --- disk-1, the pre- sub-material molding of disk-2 --- diameter-1, through -3 pre- sub-material section wedging --- diameters -1, through -3 pre- sub-material section broadening --- diameters -1, through -3 pre- sub-material sections broken end stirring --- diameters -1, through -3 pre- sub-material section molding --- diameters -1, diameter -2, diameter -3 is wedged --- diameter -1, diameter -2, diameter -3 broadens, disk -1,-2 windrow of disk --- diameter -1, disk -1, diameter -2 , disk -2, diameter -3 concentrate molding --- product blanking rolling complete.The present invention overcomes prior art disadvantage, keeps material distribution balanced, saves material, improve quality, facilitate processing, improves stock utilization.
Description
Technical field
The present invention relates to cross wedge rolling technique fields, in particular to a kind of pre- sub-material to concentrate molding cross wedge rolling technique.
Background technique
Existing multi-step axial workpiece blank utilize Regularity of Workpiece of Cross Wedge Rolling when, forming process be since centre to both ends by
A molding, being molded in the circumferential direction of roll of each step have his individual position alternatively each step in roll different weeks
Molding upwards.The temperature of blank is to be gradually reduced during the rolling process, that is to say, that roll is all during the rolling process for blank
Temperature when upward stage at different levels molding is different, the identical hot blank of different temperatures size for thermal expansion and contraction principle
When being cooled to mutually synthermal, size is different, due to each stepped stage the circumferentially upper position of roll be different because
This causes product size unbalance, for guarantee product machining allowance it is sufficient therefore Blank Design opportunity add surplus generally reserved compared with
Greatly, waste of material is serious, machine adds higher cost.
Such as in order to form component shown in Fig. 1 in reality, the prior art generally can be using the operation of rolling in Fig. 2 technology:
Bar is put into mold material waiting section after being heated to rolling temperature --- and starting milling train mold starts to be rotated under the driving of milling train
The pre- sub-material section exhibition of diameter-2 that mold drives bar rotation to start to roll under the action of frictional force --- the pre- sub-material section wedging of diameter-2 ---
Wide --- the pre- sub-material section molding of diameter-2 --- disk-1, disk-2 form --- diameter-1 is wedged through-3 pre- sub-material sections --- diameter-1, through-3
--- diameter-1 forms the --- wedging of warp-2 --- broadening of diameter-2 --- molding of diameter-2 --- through-3 pre- sub-material sections for pre- sub-material section broadening
Diameter-1, --- diameter-1, --- diameter-1 is formed through-3 --- the product blanking rolling completion through-3 broadenings through-3 wedgings.From the above mistake
Journey is not difficult to find out that the entire operation of rolling is actually overall can be divided into through -2 sub-materials --- disk -1, disk -2 form --- diameter -1,
Through-3 sub-materials --- molding of diameter-2 --- diameter-1, through-3 molding, the different diameters of axle of entire product are in the circumferentially upper molding position of mold
It sets and is different and sub-material and molding is interspersed carries out.
Since forming process is to form one by one to both ends since centre, cause to occupy the longer die cost of roll surface compared with
High, equipment processing ability is limited.Since each stepped stage is difference in the circumferentially upper position of roll, cause mold body not
With circumferential position difference directly react caused on product each diameter of axle of product disparity simultaneously to rolling equipment requirement
Higher, adjustment difficulty is larger, and product size stability is poor and Regularity of Workpiece of Cross Wedge Rolling can generate material head gesture when both ends finally form
Waste of material must be caused, in view of the above problems, urgently improving.
Summary of the invention
The technical problem to be solved by the present invention is to overcome prior art disadvantage, it is horizontal to provide a kind of pre- sub-material concentration molding wedge
Technology is rolled, keeps material distribution balanced, saves material, improve quality, facilitate processing, improve stock utilization.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of pre- sub-material concentration molding cross wedge rolling skill
Art, the cross wedge rolling technique shaped article include the convex disk of two axially spaced distributions, respectively disk -1 and disk -2, described
It is connected between disk -1 and disk -2 by the diameter of axle of diameter -2, left end side is provided with the diameter of axle of diameter -1, the disk -2 on the disk -1
Upper right end side is provided with the diameter of axle of diameter -3.
The processing step of cross wedge rolling technique includes:
(1) bar to be processed is taken, after Bar material blank is heated to rolling temperature, is put into the material waiting section of milling train mold；
(2) start milling train mold, start to rotate under the driving of milling train, mold drives bar rotation under the action of frictional force
Turn to start to roll；
(3) the pre- sub-material section of diameter -2 wedges die draft and completes the pre- sub-material section of diameter -2 after the pre- sub-material section broadening of diameter -2 on bar
Molding；
(4) the pre- sub-material molding of disk -1, disk -2 on bar；
(5) the pre- sub-material section of diameter -1, diameter -3 wedges die draft, the pre- sub-material section broadening of diameter -1, diameter -3, diameter -1, diameter-on bar
3 pre- sub-material sections broken end stirrings complete the pre- sub-material section molding of diameter -1, diameter -3；
(6) diameter -1, diameter -2, diameter -3 wedge die draft respectively on bar, and diameter -1, diameter -2, diameter -3 broaden, disk -1, disk -2
Windrow；
(7) diameter -1, disk -1, diameter -2, disk -2, diameter -3 concentrate molding, and the rolling of final product blanking is completed.
As an improvement, bar heating is existed using the diathermanous electric furnace heating of Medium frequency induction, heating and temperature control in the step (1)
1000 DEG C ± 10 DEG C, make the piece surface smooth even of rolling, oxidation is few, and each step tread depth of parallelism is good, and error is small.
As an improvement, mold roll surface both ends wedging section installs positioning rib in the step (2), bar passes through positioning bar
Item wedges die draft, makes bar in the center of die draft, and blank is unlikely to tilt to one end.
As an improvement, needing to guarantee in the circumferentially same position of roll, each shaft part temperature phase of strip plate before roll forming in the step (2)
Together.
The present invention has the advantage that the present invention realizes multi-step sub-material or molding in same rolling section, avoid rolling
In the process in same active section the front and back temperature difference and mandrel error and caused by product sub-material it is uneven, keep material distribution balanced, equipment
Adjustment difficulty reduces, and product size more balances, and size balanced error is reduced to 0.5mm by original 1.5mm, to make blank
Design machining allowance reduces 1mm or more, saves material, improve quality, facilitate processing, according to making to roll for this exemplar
Base materials reduce by 10% or more, and rejection rate reduces by 0.1%, the unilateral reduction 1mm of strip plate machining allowance, machine addition this reduction by 40%
(turnery processing for referring to outer circle and shoulder), new design occupy roll surface 1028.07mm, and original design occupies roll surface 1284.88mm, roll surface
It is equivalent to occupy reduction 256.81mm, die cost reduction, the working ability range of equipment improves 20%.Increase in sub-material section
Reserved material section stirring design, two ends diameter avoids the generation of rolling material head using reversed rolling design in molding broadening section
Improve 30% or more stock utilization.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that part is processed in the present invention.
Fig. 2 is the schematic diagram of original cross wedge rolling forming technique in the present invention.
Fig. 3 is the schematic diagram for the cross wedge rolling forming technique announced in the present invention.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments.
In the specific implementation, a kind of pre- sub-material concentration molding cross wedge rolling technique, the cross wedge rolling technique molding produces the present invention
Product include the convex disk of two axially spaced distributions, respectively disk -1 and disk -2, pass through diameter -2 between the disk -1 and disk -2
The diameter of axle connects, and left end side is provided with the diameter of axle of diameter -1 on the disk -1, and right end side is provided with the axis of diameter -3 on the disk -2
Diameter.
The processing step of cross wedge rolling technique includes:
(1) bar to be processed is taken, bar heating is using the diathermanous electric furnace heating of Medium frequency induction, and heating and temperature control is 1000
DEG C ± 10 DEG C, make the piece surface smooth even of rolling, oxidation is few, and each step tread depth of parallelism is good, and error is small, by Bar material blank
After being heated to rolling temperature, it is put into the material waiting section of milling train mold；
(2) start milling train mold, mold roll surface both ends wedging section installs positioning rib, and bar is wedged by positioning rib
Die draft makes bar in the center of die draft, and blank is unlikely to tilt to one end, need to guarantee circumferentially same in roll
Position, each shaft part temperature of strip plate are identical, start to rotate under the driving of milling train, and mold drives bar rotation under the action of frictional force
Start to roll；
(3) the pre- sub-material section of diameter -2 wedges die draft and completes the pre- sub-material section of diameter -2 after the pre- sub-material section broadening of diameter -2 on bar
Molding；
(4) the pre- sub-material molding of disk -1, disk -2 on bar；
(5) the pre- sub-material section of diameter -1, diameter -3 wedges die draft, the pre- sub-material section broadening of diameter -1, diameter -3, diameter -1, diameter-on bar
3 pre- sub-material sections broken end stirrings complete the pre- sub-material section molding of diameter -1, diameter -3；
(6) diameter -1, diameter -2, diameter -3 wedge die draft respectively on bar, and diameter -1, diameter -2, diameter -3 broaden, disk -1, disk -2
Windrow；
(7) diameter -1, disk -1, diameter -2, disk -2, diameter -3 concentrate molding, and the rolling of final product blanking is completed.
From above procedure it can be seen that the section Relatively centralized completion before a mold of the pre- sub-material of product, each diameter of axle forming are concentrated
It is completed at the same time in mold tail portion, increases diameter -1, diameter -3 pre- sub-material section end stirring and diameter 1, -3 profiled section of diameter during pre- sub-material
Broadening eliminates material head caused by former rolling mode using reversed rolling (broadening from outside to inside).
This technology illustrates that the schematic diagram of product structure is three diameters, two disks, not limited to this, it can be achieved that more in actual use
The concentration formation rolling of diameter, polydisc.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (5)
1. a kind of pre- sub-material concentrates molding cross wedge rolling technique, which is characterized in that the cross wedge rolling technique shaped article includes two
The convex disk of axially spaced distribution, respectively disk -1 and disk -2 are connected between the disk -1 and disk -2 by the diameter of axle of diameter -2, institute
The diameter of axle that left end side on disk -1 is provided with diameter -1 is stated, right end side is provided with the diameter of axle of diameter -3 on the disk -2.
2. a kind of pre- sub-material according to claim 1 concentrates molding cross wedge rolling technique, it is characterised in that: the cross wedge rolling skill
The processing step of art includes:
(1) bar to be processed is taken, after Bar material blank is heated to rolling temperature, is put into the material waiting section of milling train mold；
(2) start milling train mold, start to rotate under the driving of milling train, mold drives bar rotation to open under the action of frictional force
Begin to roll；
(3) the pre- sub-material section of diameter -2 wedges die draft on bar, after the pre- sub-material section broadening of diameter -2, complete the pre- sub-material section of diameter -2 at
Type；
(4) the pre- sub-material molding of disk -1, disk -2 on bar；
(5) the pre- sub-material section of diameter -1, diameter -3 wedges die draft on bar, and the pre- sub-material section broadening of diameter -1, diameter -3, diameter -1, diameter -3 are pre-
Sub-material section broken end stirring completes the pre- sub-material section molding of diameter -1, diameter -3；
(6) diameter -1, diameter -2, diameter -3 wedge die draft respectively on bar, and diameter -1, diameter -2, diameter -3 broaden, disk -1, -2 windrow of disk；
(7) diameter -1, disk -1, diameter -2, disk -2, diameter -3 concentrate molding, and the rolling of final product blanking is completed.
3. a kind of pre- sub-material according to claim 2 concentrates molding cross wedge rolling technique, it is characterised in that: the step (1)
Middle bar heating is using the diathermanous electric furnace heating of Medium frequency induction, and heating and temperature control is at 1000 DEG C ± 10 DEG C.
4. a kind of pre- sub-material according to claim 2 concentrates molding cross wedge rolling technique, it is characterised in that: the step (2)
Middle mold roll surface both ends wedging section installs positioning rib, and bar wedges die draft by positioning rib.
5. a kind of pre- sub-material according to claim 2 concentrates molding cross wedge rolling technique, it is characterised in that: the step (2)
It needs to guarantee before middle roll forming identical circumferentially with position, each shaft part temperature of strip plate in roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910669057.3A CN110369495B (en) | 2019-07-24 | 2019-07-24 | Cross wedge rolling technology for pre-distribution and centralized forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910669057.3A CN110369495B (en) | 2019-07-24 | 2019-07-24 | Cross wedge rolling technology for pre-distribution and centralized forming |
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| Publication Number | Publication Date |
|---|---|
| CN110369495A true CN110369495A (en) | 2019-10-25 |
| CN110369495B CN110369495B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910669057.3A Active CN110369495B (en) | 2019-07-24 | 2019-07-24 | Cross wedge rolling technology for pre-distribution and centralized forming |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121443A (en) * | 1976-10-20 | 1978-10-24 | Vyzkumny Ustav Tvarecich Stroju A Technologie Tvareni | Method of and apparatus for rolling long work pieces |
| JPS58179527A (en) * | 1982-04-15 | 1983-10-20 | Nissan Motor Co Ltd | Cross rolling working method |
| CN1970191A (en) * | 2006-12-12 | 2007-05-30 | 北京科技大学 | Multi-wedge synchronizing smooth butte rolling method for rolling same diameter axle type pieces by cross wedge rolling |
| CN102688908A (en) * | 2012-06-10 | 2012-09-26 | 吉林大学 | Designing method for cross wedge rolling mould of conical surface stepped shaft part |
| CN105328088A (en) * | 2015-11-06 | 2016-02-17 | 宁波大学 | Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece |
-
2019
- 2019-07-24 CN CN201910669057.3A patent/CN110369495B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121443A (en) * | 1976-10-20 | 1978-10-24 | Vyzkumny Ustav Tvarecich Stroju A Technologie Tvareni | Method of and apparatus for rolling long work pieces |
| JPS58179527A (en) * | 1982-04-15 | 1983-10-20 | Nissan Motor Co Ltd | Cross rolling working method |
| CN1970191A (en) * | 2006-12-12 | 2007-05-30 | 北京科技大学 | Multi-wedge synchronizing smooth butte rolling method for rolling same diameter axle type pieces by cross wedge rolling |
| CN102688908A (en) * | 2012-06-10 | 2012-09-26 | 吉林大学 | Designing method for cross wedge rolling mould of conical surface stepped shaft part |
| CN105328088A (en) * | 2015-11-06 | 2016-02-17 | 宁波大学 | Cross wedge rolling end forming method for closing and opening united rolled stub-bar-free shaft piece |
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| Publication number | Publication date |
|---|---|
| CN110369495B (en) | 2020-11-03 |
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Denomination of invention: A Cross Wedge Rolling Technology for Pre splitting Concentrated Forming Effective date of registration: 20221024 Granted publication date: 20201103 Pledgee: Laiwu branch of China Postal Savings Bank Co.,Ltd. Pledgor: SHANDONG TAIJIN PRECISION FORGING CO.,LTD. Registration number: Y2022980019329 |
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