CN111231287A - Method for designing shape of rubber winding forming compression roller - Google Patents
Method for designing shape of rubber winding forming compression roller Download PDFInfo
- Publication number
- CN111231287A CN111231287A CN202010050269.6A CN202010050269A CN111231287A CN 111231287 A CN111231287 A CN 111231287A CN 202010050269 A CN202010050269 A CN 202010050269A CN 111231287 A CN111231287 A CN 111231287A
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- China
- Prior art keywords
- winding
- rubber
- core mold
- angle
- adhesive tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 title claims abstract description 98
- 229920001971 elastomer Polymers 0.000 title claims abstract description 37
- 230000006835 compression Effects 0.000 title claims abstract description 23
- 238000007906 compression Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002390 adhesive tape Substances 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 abstract description 12
- 230000007704 transition Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 5
- 238000007731 hot pressing Methods 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
- B29C53/825—Mandrels especially adapted for winding and joining for continuous winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8041—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/16—EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
A method for designing the shape of a rubber winding forming press roller belongs to the technical field of rubber winding forming. First, the winding angle is calculated from the rubber tape width and the radius of the core mold. And secondly, winding the adhesive tape along a direction which forms an included angle with the axis of the core mold as a winding angle, wherein the direction is a winding spiral line direction A-A, and an elliptic equation of the core mold on a section B-B is determined by taking the vertical section of the A-A as a B-B surface. And finally, constructing an elliptic revolution surface of the winding pressing roller by taking an elliptic equation as a bus and the axis of the winding pressing roller as a revolution center line, and finishing the appearance design of the rubber winding pressing roller. The rubber winding compression roller designed by the method is suitable for the requirement of circumferential winding of the heat insulating layer of the cylinder section and the transition parts at two ends of the solid rocket engine. The shape of the rubber winding compression roller is designed by adopting the minimum diameter model in the models of the solid rocket engines, so that the automatic winding requirement of rubber heat insulating layers at the cylinder sections of the solid rocket engines of different models can be met.
Description
Technical Field
The invention belongs to the technical field of rubber winding forming, and relates to a design method for a shape of a compression roller formed by winding a heat insulating layer of a solid rocket engine.
Background
At present, the shell of the solid rocket engine is generally manufactured by adopting a method of winding an ethylene propylene diene monomer rubber heat insulation inner layer and a composite material on a shell for molding. The method for forming the ethylene propylene diene monomer heat insulation layer mainly comprises a manual surface mounting method and a winding forming method. In the winding and forming process of the heat insulating layer of the solid rocket engine, the ethylene propylene diene monomer rubber tape is heated to improve the self-adhesive property, the tape is wound on the core mold by using the winding compression roller, and the winding pressure directly influences the appearance of the heat insulating layer and the bonding strength and the density of the heat insulating layer. Because the surfaces of the winding core mold and the rubber heat insulation layer are variable curvature curved surfaces, in order to ensure that the winding pressure in the width direction of the adhesive tape is uniformly and constantly distributed, the appearance of the winding compression roller needs to be reasonably designed.
A hot-pressing roller device for a cloth tape winding machine is disclosed in 'a hot-pressing roller device for a cloth tape winding machine' of Penjiahao (CN202716461U), and the device comprises a hot-pressing roller body, a central shaft, an electric heating pipe and a bush, mainly relates to a hot-pressing roller structure and does not relate to the shape design of a pressing roller. Zhanjun discloses a hot press roll device for a composite material tape winding machine in a patent 'the press roll device for the composite material tape winding machine' (CN103909649A), mainly relates to a hot press roll structure for automatically scraping molten glue of a press roll, and does not relate to the appearance design of the press roll.
In the automatic winding process of the heat insulation layer of the cylinder section of the solid rocket engine, if the winding compression roller is in a simple cylindrical surface shape, when the circular winding is performed, the distance between the winding compression roller in the width direction of the adhesive tape and the shape of the core mold (or the shape of the heat insulation layer) is inconsistent, the distance between the edge part of the adhesive tape is large, the winding pressure is small, the winding quality and the bonding quality are influenced, and even the edge warping phenomenon appears on two sides of the wound adhesive tape, so that the shape of the winding compression roller needs to be reasonably designed.
Disclosure of Invention
The invention provides a method for designing the shape of a rubber winding forming press roller, which is used for designing the shape of the rubber winding press roller.
The technical scheme adopted by the invention is as follows:
a method for designing the shape of a rubber winding forming compression roller comprises the following steps:
(1) calculation of winding angle α:
the winding angle α is the angle between the centerline of the rubber tape 1 and the mandrel axis, C is the mandrel circumference, W is the rubber tape width, and R is the mandrel radius, where the ratio of W to C is the cosine of the winding angle, from which the winding angle α is calculated as:
α＝arccos(W/C)..........................①
C＝2πR...........................②
(2) calculating the ellipse equation of the core model on the section B-B:
the tape winding is performed along the direction which forms an included angle α with the axis of the core mold, the direction is the winding spiral line direction A-A, the surface B-B is a vertical section A-A, the core mold is an ellipse on the section B-B, and the equation of the ellipse is as follows:
cos2αx2+y2＝R2...........................③
substituting formula ①② into formula ③ yields:
wherein: x and y are respectively the horizontal and vertical coordinates of the points on the ellipse.
The position relation of the core die, the winding press roller and the rubber adhesive tape in the B-B section is specifically that the rubber adhesive tape is wound on the core die along the direction which forms a winding angle α with the axis of the core die under the action of the winding press roller.
(3) And (3) constructing an elliptic revolution surface of the winding pressing roller by taking the elliptic equation ④ determined in the step (2) as a bus and the axis 4 of the winding pressing roller 3 as a revolution center line, and finishing the appearance design of the rubber winding pressing roller.
The invention has the beneficial effects that: the shape of the rubber winding compression roller adopts an elliptical line as a bus structure to wind the rotary concave surface of the compression roller, so that the winding pressure can be reduced, the winding pressure is uniformly distributed along the width direction of the adhesive tape, the winding pressure and the winding quality of the edge of the adhesive tape are improved, and the phenomenon of edge warping on two sides of the adhesive tape is avoided; meanwhile, the elliptical revolution surface of the winding pressing roller can improve the stability of the adhesive tape in the winding process. The rubber winding compression roller designed by the method is suitable for the requirement of circumferential winding of the heat insulating layer of the cylinder section and the transition parts at two ends of the solid rocket engine. The shape of the rubber winding compression roller is designed by adopting the minimum diameter model in the models of the solid rocket engines, so that the automatic winding requirement of rubber heat insulating layers at the cylinder sections of the solid rocket engines of different models can be met.
Drawings
FIG. 1 is a schematic view of circumferential rubber winding, wherein 1 is a rubber tape, α is a winding angle, W is a tape width, C is a mandrel circumference, A-A is a winding helix direction, and B-B is a vertical section of A-A in the winding helix direction.
Fig. 2 is a schematic diagram of the positional relationship between the core mold, the winding pressure roller and the rubber tape on the B-B surface, wherein: 1 is rubber adhesive tape, 2 is an elliptical line on the section of the core mold B-B, 3 is a winding compression roller, 4 is the axis of the winding compression roller, h is the thickness of the adhesive tape, L is the length of the winding compression roller, and R is the radius of the core mold.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The embodiment relates to a method for designing the shape of a pressing roller formed by winding a heat insulating layer of a solid rocket engine, which comprises the following steps:
in this embodiment, the core mold diameter ranges for different solid rocket engine models are: 480mm-2000mm, selecting the minimum model core die with the diameter of 480mm to design the shape of the winding roller, wherein the radius R of the core die is 240mm, and the width W of the adhesive tape is 100 mm.
(1) As shown in fig. 1 and 2, the winding angle α is calculated from the rubber tape width W and the core mold radius R as:
C＝2πR..........................①
α＝arc cos(W/C)..................................②
i.e., 1507.20mm for C and 86.20 ° for α.
(2) As shown in fig. 1, tape winding is performed in a direction forming a winding angle α (counterclockwise rotation along the mandrel axis) with respect to the mandrel axis, which is a vertical section of a winding helix direction a-a and a plane B-B of a-a, and the positional relationship of the mandrel, winding roller, and rubber tape in the plane B-B is shown in fig. 2, where the mandrel has an ellipse 2 in the section B-B, which is the equation:
cos2αx2+y2＝R2............................③
namely:
(3) and (3) constructing an elliptic revolution surface of the winding pressing roller by taking an elliptic equation ④ as a bus and the axis 4 of the winding pressing roller as a revolution center line, and finishing the appearance design of the rubber winding pressing roller.
Obtaining a rotary generatrix expression of the winding compression roller according to the calculation, wherein the axial length of the winding compression roller is 1-2mm longer than the width of the adhesive tape, namely:
the winding pressure roller is taken as a winding pressure roller rotating bus, and the winding pressure roller axis 4 is taken as a rotating center line, so that the appearance of the winding pressure roller can be constructed.
The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.
Claims (1)
1. A method for designing the shape of a rubber winding forming compression roller is characterized by comprising the following steps:
(1) calculating wind angle α
The winding angle α is an included angle between the central line of the rubber adhesive tape along the winding direction and the axis of the core mold, C is the perimeter of the core mold, W is the width of the rubber adhesive tape, and R is the radius of the core mold, wherein the ratio of W to C is the cosine value of the winding angle, and the winding angle α is calculated according to the value:
C＝2πR...............................①
α＝arccos(W/C)..........................②
(2) calculating the ellipse equation of the core model on the section B-B
The tape winding is carried out along the direction which forms an included angle α with the axis of the core mould, the direction is the winding spiral line direction A-A, the vertical section of A-A is a B-B surface, the core mould is an ellipse on the section B-B, and the ellipse equation is as follows:
cos2ax2+y2＝R2..........................③
substituting formula ② into formula ③ yields:
wherein: x and y are respectively the horizontal and vertical coordinates of the points on the ellipse;
the position relation of the core mold in the B-B section, the winding compression roller and the rubber adhesive tape is specifically that the rubber adhesive tape is wound along the direction which forms an included angle of α with the axis of the core mold under the action of the winding compression roller, and the rubber adhesive tape is wound on the core mold;
(3) and (3) constructing an elliptic revolution surface of the winding pressing roller by taking the elliptic equation ④ determined in the step (2) as a bus and the axis of the winding pressing roller as a revolution center line, and finishing the appearance design of the rubber winding pressing roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050269.6A CN111231287B (en) | 2020-01-17 | 2020-01-17 | Method for designing shape of rubber winding forming compression roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050269.6A CN111231287B (en) | 2020-01-17 | 2020-01-17 | Method for designing shape of rubber winding forming compression roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111231287A true CN111231287A (en) | 2020-06-05 |
| CN111231287B CN111231287B (en) | 2021-12-10 |
Family
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Family Applications (1)
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|---|---|---|---|
| CN202010050269.6A Expired - Fee Related CN111231287B (en) | 2020-01-17 | 2020-01-17 | Method for designing shape of rubber winding forming compression roller |
Country Status (1)
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| CN111231287B (en) | 2021-12-10 |
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Granted publication date: 20211210 |