CN109092978B - One kind is based on the formed in mould bent bus helical blade forming method of multiple spot - Google Patents
One kind is based on the formed in mould bent bus helical blade forming method of multiple spot Download PDFInfo
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- CN109092978B CN109092978B CN201810800347.2A CN201810800347A CN109092978B CN 109092978 B CN109092978 B CN 109092978B CN 201810800347 A CN201810800347 A CN 201810800347A CN 109092978 B CN109092978 B CN 109092978B
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- pressure head
- helical blade
- ring blank
- circular ring
- array
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/78—Making other particular articles propeller blades; turbine blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
One kind belongs to bent bus helical blade field shaping technique, is characterized in that implementation steps are as follows: by concentric ring central angle based on the formed in mould bent bus helical blade forming method of multiple spotCorresponding part is removed to form eccentric circular ring blank, and inside and outside diameter is respectively equal to the internal-and external diameter of helical blade；Default upper and lower group pressure head array, each indenter shape are that semicircle is spherical；Default song bus helical blade curve form is overlapped the enveloping surface of the final position point on each pressure head vertex with preset helical blade curved surface according to the stroke of the default upper and lower group each pressure head of pressure head array of curve form；Working head is determined according to eccentric circular ring blank, and circumferentially positioned and centralized positioning is carried out to eccentric circular ring blank；Start each pressure head pressure above according to the preset strokes of each working head or pressure acts；It carries out the above-mentioned monolithic helical blade processed to be spliced to form endless spiral.Advantage is to produce each koji bus helical blade according to preset shape of generatrix.
Description
Technical field
The invention belongs to Machine Designs and manufacture field, and in particular to one kind is based on the formed in mould bent bus spiral of multiple spot
Blade forming method.
Background technique
Helical blade is widely used in the mechanical equipments such as conveyer, excavator, and especially screw conveyor is used extensively
In the industry such as Grain Industry, port and pier, construction material transport service, machine-building processing industry, transportation.Traditional spiral shell
It is integrally formed that vane piece passes through oblique milling mostly, or is welded to form after being separately formed by single blade, and both methods can only all be used
In manufacture straight edge line helical blade.During screw conveyor conveys material, the circle of the material particles at helical axis
Circular velocity is big compared with outer layer, and conveying speed is very low.Therefore, promote material internal layer pivoting, thus go into additives stream,
The conveying capacity for reducing device increases the consumption of energy；And bent bus helical blade can reduce additives stream, effectively mention
High transfer efficiency.
Multiple spot mould forming method is the emerging technology that eighties of last century mid-term proposes, initial stage in this century China starts to make on a large scale
With, seamless-molding integrally formed commonly used in large-scale workpiece.The prior art is suitable for small stroke, small deformation processing more, using mould
Tool depresses forming method after adjusting shape, and the method cannot constrain in the torsional deflection generated during large deformation workpiece shaping, cause
Molding failure.
Summary of the invention
The object of the present invention is to provide one kind based on the formed in mould bent bus helical blade forming method of multiple spot, can overcome
Disadvantage existing in the prior art.
What the object of the invention was realized in: it is characterized in that implementation steps are as follows:
(1) bent bus helical blade curve form, including its internal diameter, outer diameter, screw pitch, initial line and termination side angle are preset
θ, θ=(0.1~0.2) π.
(2) prefabricated eccentric circular ring blank, as shown in Figure 1, a, b are initial line and the termination side of fan-shaped blank respectively in Fig. 1.
(3) using the multi-point forming device of general semi-round ball pressure head circular array arrangement, by the central axis of eccentric circular ring blank
With the center overlapping of axles of semi-round ball pressure head circular array, it is numbered with the concentric circles where the vertex of semi-round ball pressure head: with step
Suddenly eccentric circular ring blank prefabricated in (2) is 1 away from concentric circles number where the nearest semi-round ball pressure head vertex of eccentric circular ring blank internal diameter,
Its concentric circular diameter is d '；It is n away from circle number where the nearest semi-round ball pressure head vertex of eccentric circular ring blank outer diameter, concentric circles is straight
Diameter is D '；Concentric ring number n=1+ (D '-d ')/Δ D, Δ D are concentric diameter of a circles where two adjacent rings semi-round ball pressure head vertex
Difference, it is specific as shown in Figure 2.
(4) working head is determined as shown in figure 4, for upper and lower pressure head circular array, in semi-round ball pressure head circular array
The heart is starting point, takes any two radiuses on semi-round ball pressure head circular array to be denoted as a ', b ' respectively, central angle folded by a ', b ' is θ；
The pressure head other than in above-mentioned upper and lower pressure head array other than first lap and within the n-th circle and region folded by central angle θ is taken to make
For working head；(5) as shown in figure 4, by the central axis weight of the centre point of above-mentioned upper and lower working head array and eccentric circular ring blank
It closes, and so that it is played initial line a and be overlapped with radius a ', terminate side b and be overlapped with radius b '；
(6) according to the thickness and curve form of preset bent bus helical blade, the vertex of upper and lower working head array is taken
In the subpoint of bent bus helical blade surface, according to the initial position of working head and the subpoint on helical blade surface
The stroke of each pressure head is calculated, and upper and lower spacing of the pressure head circular array in initial position is equal to the thickness of helical blade.
(7) center is carried out to eccentric circular ring blank to fix with circumferencial direction, guarantee the center of fan-shaped ring billet material in process
With the central axis of upper and lower pressure head circular array always on same axis.
(8) it manipulates upper and lower pressure head circular array and gently supports eccentric circular ring blank surface, upper and lower pressure head circular array is according to default
Ram travel so that each pressure head is contacted and is traveled at the uniform speed with eccentric circular ring blank, each pressure head speed of service and its stroke size at
Direct ratio guarantees each semi-round ball pressure head while reaching predeterminated position, eccentric circular ring blank under the action of upper and lower pressure head circular array at
Type is bent bus helical blade.Ram position is as shown in Figure 5 after the operation of semi-round ball pressure head.Obtained monolithic song bus helical blade
As shown in Figure 6.
(9) continuous splicing is carried out to helical blade obtained by the above method and obtains endless spiral.
Advantages of the present invention and good effect
1, integral one-step molding improves the post forming that bent bus is formed after first bending eccentric circular ring blank in aging method
Method, time-saving and efficiency.
2, the process of molding in conventional method, mode transfer is eliminated, time and the fund of production mold are saved；Relative to use
The method of compression moulding of mold, the present invention, to each point progressive molding, avoid primary pressure according to the speed difference of pressure head
It makes since blade is bent the destruction with stretching complex stress condition to workpiece.
3, each koji bus helical blade can be produced according to preset shape of generatrix.
Detailed description of the invention
Fig. 1 is eccentric circular ring blank machining sketch chart of the present invention.
Fig. 2 is pressure head arrangement schematic diagram of the present invention.
Fig. 3 is helical blade schematic cross-section of the present invention.
Fig. 4 is ram position schematic diagram before forming in the present invention.
Fig. 5 is ram position schematic diagram after forming in the present invention.
Fig. 6 is monolithic helical blade schematic diagram in the present invention.
In figure: 1 be seaming chuck circular array 2 be annular workpieces 3 is push-down head circular array
D is that fan-shaped ring plate overall diameter d is fan-shaped ring plate interior diameter
It is surface curvature s is screw pitch that L, which is spoon of blade chord length R,
H is that spoon of blade action s ' is monolithic helical blade length, is herein 0.9s
D ' is diameter of a circle where outmost turns pressure head
D ' is diameter of a circle where innermost circle pressure head
Diameter of a circle difference δ where Δ D is two adjacent rings pressure head vertex is vane thickness
A is that eccentric circular ring blank initial line b is that eccentric circular ring blank terminates side
A ' is that working head array initial line b ' is that working head array terminates side
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments:
In multi-point forming device used in the present invention shown in Fig. 4, multiple spot mold is by upper and lower two groups of spherical head battle arrays
Column 1,3 form.
It is illustrated with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, concrete operations process is as follows:
(1) bent bus helical blade curve form, including and internal diameter, outer diameter, screw pitch and initial line and end are determined before processing
The only angle theta on side.The material selected herein is Q345, and outer dimension is(outer diameter × internal diameter
× thickness) endless metal plate, excision the π of θ=0.1 concentric sector portion obtain fan-shaped ring blank.Specifically such as Fig. 1 institute
Show.
(3) pressure head uses semi-round ball pressure head, radius R=14mm in this example；Specific arrangement is as shown in Fig. 2, using 5 circles
Pressure head array, d '=148mm, D '=372mm, Δ D=56mm.Every circle pressure head number is respectively as follows: 14 from inside to outside, 20,26,
32,38, and it is evenly distributed in the circumferential direction.The radius of curvature in target song bus bar blade section is the circular arc of R=2000mm, chord length
B=140mm, action h=18mm, blade pitch s=320mm, monolithic helical blade length s '=288mm.Spoon of blade section
Shape is as shown in Figure 3.Take upper and lower group working head vertex in the subpoint of bent bus helical blade surface, according to working head
Initial position and the subpoint on helical blade surface calculate each pressure head stroke it is as shown in the table, wherein pressure head number
By a ' until b ':
First lap
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Stroke | -166.1 | -143.3 | -120.4 | -97.6 | -74.7 | -51.8 | -29 | -6.1 | 16.7 | 39.6 |
| Number | 11 | 12 | 13 | 14 | ||||||
| Stroke | 62.4 | 85.3 | 108.2 | 131 |
Second circle
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Stroke | -176.7 | -160.7 | -144.7 | -128.7 | -112.7 | -96.7 | -80.7 | -64.7 | -48.7 | -32.7 |
| Number | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Stroke | -16.7 | -0.7 | 15.3 | 31.3 | 47.3 | 63.3 | 79.3 | 95.3 | 111.3 | 127.3 |
Third circle
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Stroke | -179.6 | -167.3 | -155 | -142.7 | -130.4 | -118.1 | -105.7 | -93.4 | -81.1 | -68.8 |
| Number | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Stroke | -56.5 | -44.2 | -31.9 | -19.6 | -7.3 | 5 | 17 | 29 | 41.9 | 54.3 |
| Number | 21 | 22 | 23 | 24 | 25 | 26 | ||||
| Stroke | 66.6 | 78.9 | 91.2 | 103.5 | 115.8 | 128.1 |
4th circle
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Stroke | -174.8 | -167.8 | -154.8 | -144.8 | -134.8 | -124.8 | -114.8 | -104.8 | -94.8 | -84.8 |
| Number | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Stroke | -74.8 | -64.8 | -54.8 | -44.8 | -34.8 | -24.8 | -14.8 | -4.8 | 5.2 | 15.2 |
| Number | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Stroke | 25.2 | 35.2 | 45.2 | 55.2 | 65.2 | 75.2 | 85.2 | 95.2 | 105.2 | 115.2 |
| Number | 31 | 32 | ||||||||
| Stroke | 125.2 | 135.2 |
5th circle
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Stroke | -162.3 | -152.2 | -153.9 | -145.5 | -137.1 | -128.6 | -120.2 | -111.8 | -103.4 | -95 |
| Number | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Stroke | -86.5 | -78.1 | -69.7 | -61.3 | -44.4 | -36 | -27.6 | -19.2 | -10.7 | -2.3 |
| Number | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Stroke | 6.1 | 14.5 | 22.9 | 31.4 | 39.8 | 48.2 | 56.6 | 65 | 73.5 | 81.9 |
| Number | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | ||
| Stroke | 90.3 | 98.7 | 107.2 | 115.6 | 124 | 132.4 | 140.8 | 149.3 |
Above in each table, the positive and negative expression pressure head traffic direction of stroke, relative initial position is negative downwards, is upwards
Just.In order to calculate the convenience of ram travel, upper and lower working head is placed in same level, and upper and lower pressure head circular array
Spacing in initial position is equal to the thickness of helical blade.
(4) centre point of upper and lower working head array is overlapped with the centre point of eccentric circular ring blank, working head sideline
A ', b ' are overlapped with the side eccentric circular ring blank a, b, and eccentric circular ring billet location and semi-round ball pressure head arrangement are as shown in Figure 4 before shaping.
(5) after being completely fixed eccentric circular ring blank, upper and lower pressure head circular array gently supports eccentric circular ring blank surface, upper and lower to press
Head circular array makes each pressure head contact and travel at the uniform speed with eccentric circular ring blank according to preset ram travel, each pressure head operation
Speed is directly proportional to its stroke size, and eccentric circular ring blank is under the deformation force and displacement constraint that pressure head provides according to certain pressure head row
Journey is gradually deformed into target helical blade curve form, upper and lower pressure head circular array and helical blade after the molding of eccentric circular ring blank
Curve form is as shown in Figure 5.
(6) monolithic helical blade after molding is as shown in Figure 6.
(7) multiple monolithic helical blades are continuously spliced, obtains continuous helical blade.
(8) example discussed above is only that embodiment of the present invention is described, not to application range of the invention
It is defined, under the premise of not departing from spirit and technical method of the invention, those of ordinary skill in the art are to this hair
The various changes and improvements that bright technical method is made should all be fallen into the protection scope of claims of the present invention.
Claims (1)
1. one kind is based on the molding bent bus helical blade forming method of multiple spot, it is characterized in that implementation steps are as follows: (1) presetting song
The curve form of bus helical blade, including its internal diameter, outer diameter and initial line and termination side angle；(2) prefabricated fan-shaped ring billet
Material, setting the initial line of fan-shaped blank and terminating side is respectively a, b；(3) using the arrangement of general semi-round ball pressure head circular array
Multi-point forming device, by the center overlapping of axles of the central axis of eccentric circular ring blank and semi-round ball pressure head circular array, with semi-round ball pressure
Concentric circles where the vertex of head is numbered: nearest away from eccentric circular ring blank internal diameter with eccentric circular ring blank prefabricated in step (2)
Semi-round ball pressure head vertex where concentric circles number be 1, concentric circular diameter be d ', the nearest semicircle away from eccentric circular ring blank outer diameter
Circle number is n where ball pressure head vertex, and concentric circular diameter is D '；Concentric ring number, Δ D
It is the diameter difference of concentric circles where two adjacent rings semi-round ball pressure head vertex；(4) it is directed to upper and lower pressure head circular array, with semi-round ball
Pressure head circular array center is starting point, and any two radiuses on semi-round ball pressure head circular array is taken to be denoted as a ', b ', a ', b ' respectively
Folded central angle is；It takes other than first lap in above-mentioned upper and lower pressure head array and within the n-th circle and in central angleInstitute's clip area
Pressure head other than domain is as working head；(5) make the centre point of above-mentioned upper and lower working head array and the center of eccentric circular ring blank
Overlapping of axles, and it is overlapped initial line a with radius a ', it terminates side b and is overlapped with radius b '；(6) according to preset bent bus spiral shell
The thickness and curve form of vane piece take the vertex of upper and lower working head array in the subpoint of bent bus helical blade surface,
The stroke of each pressure head, and upper and lower pressure are calculated according to the initial position of working head and the subpoint on helical blade surface
Spacing of the head circular array in initial position is equal to the thickness of helical blade；(7) center and circumference are carried out to eccentric circular ring blank
Direction is fixed, and guarantees that the center of fan-shaped ring billet material and the central axis of upper and lower pressure head circular array are always same in process
Axis；(8) it controls upper and lower pressure head circular array and gently supports eccentric circular ring blank surface, upper and lower pressure head circular array is according to preset
Ram travel makes each pressure head contact and travel at the uniform speed with eccentric circular ring blank, and each pressure head speed of service and its stroke size are at just
Than guaranteeing each semi-round ball pressure head while reaching predeterminated position, eccentric circular ring blank forms under the action of upper and lower pressure head circular array
For bent bus helical blade.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810800347.2A CN109092978B (en) | 2018-07-20 | 2018-07-20 | One kind is based on the formed in mould bent bus helical blade forming method of multiple spot |
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|---|---|---|---|
| CN201810800347.2A CN109092978B (en) | 2018-07-20 | 2018-07-20 | One kind is based on the formed in mould bent bus helical blade forming method of multiple spot |
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| CN109092978A CN109092978A (en) | 2018-12-28 |
| CN109092978B true CN109092978B (en) | 2019-09-06 |
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| CN201810800347.2A Active CN109092978B (en) | 2018-07-20 | 2018-07-20 | One kind is based on the formed in mould bent bus helical blade forming method of multiple spot |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110743952B (en) * | 2019-10-31 | 2021-02-12 | 湖南同心模具制造有限公司 | Multipoint flexible digital forming die for concrete helical blade |
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| CN201455105U (en) * | 2009-01-12 | 2010-05-12 | 吉林大学 | Base body unit staggered arrangement type multi-point forming device |
| CN102101363A (en) * | 2010-12-24 | 2011-06-22 | 哈尔滨工业大学（威海） | Multi-point forming device for plate |
| CN103752691A (en) * | 2014-01-08 | 2014-04-30 | 西安交通大学 | Discrete flexible die |
| WO2014178704A1 (en) * | 2013-04-30 | 2014-11-06 | Universiti Malaya | A multipoint stamping mould |
| CN104646475A (en) * | 2015-03-05 | 2015-05-27 | 吉林大学 | Multi-point forming method for whole aluminum alloy wall plate of aircraft |
| CN106955930A (en) * | 2017-04-19 | 2017-07-18 | 西北工业大学 | The positioner and method of a kind of wall panel parts flexible multipoint forming |
| CN107838283A (en) * | 2017-11-14 | 2018-03-27 | 吉林大学 | Multiple spot yaw press forming method for three-dimensional curve generation of sheet |
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2018
- 2018-07-20 CN CN201810800347.2A patent/CN109092978B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101259512A (en) * | 2008-04-18 | 2008-09-10 | 李悦 | Forming method of spiral subsection blade |
| CN201455105U (en) * | 2009-01-12 | 2010-05-12 | 吉林大学 | Base body unit staggered arrangement type multi-point forming device |
| CN102101363A (en) * | 2010-12-24 | 2011-06-22 | 哈尔滨工业大学（威海） | Multi-point forming device for plate |
| WO2014178704A1 (en) * | 2013-04-30 | 2014-11-06 | Universiti Malaya | A multipoint stamping mould |
| CN103752691A (en) * | 2014-01-08 | 2014-04-30 | 西安交通大学 | Discrete flexible die |
| CN104646475A (en) * | 2015-03-05 | 2015-05-27 | 吉林大学 | Multi-point forming method for whole aluminum alloy wall plate of aircraft |
| CN106955930A (en) * | 2017-04-19 | 2017-07-18 | 西北工业大学 | The positioner and method of a kind of wall panel parts flexible multipoint forming |
| CN107838283A (en) * | 2017-11-14 | 2018-03-27 | 吉林大学 | Multiple spot yaw press forming method for three-dimensional curve generation of sheet |
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