CN207499150U - A kind of Novel bolt ball node - Google Patents
A kind of Novel bolt ball node Download PDFInfo
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- CN207499150U CN207499150U CN201721589607.3U CN201721589607U CN207499150U CN 207499150 U CN207499150 U CN 207499150U CN 201721589607 U CN201721589607 U CN 201721589607U CN 207499150 U CN207499150 U CN 207499150U
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Abstract
The utility model is related to a kind of Novel bolt ball nodes, belong to the technical field of bolted spherical node design.Novel bolt ball node includes the internal steel ball for cavity structure and is arranged on the steel ball, for connecting and carrying being in charge of for steel pole, steel ball is with being in charge of integrated molding, the steel ball spherical crown shape removed for part, and the tall and big radius in steel ball of spherical crown, it is in charge of along the normal direction of steel ball and sets outward, and it is in charge of along the circumferential direction of steel ball and is uniformly distributed, it is in charge of for solid construction, it is in charge of with the counterbore set along normal direction, being provided on steel ball surface makes the curved surface rounded corner of smooth abrupt transition between adjacent be in charge of, steel ball surface has to be in charge of quantity, it is in charge of position, it is in charge of diameter, counter bore hole diameters are by the curve form to match with carrying steel pole stress being calculated through topological optimization of parameter.The Topology Optimization Analysis is carried out to bolt sphere, bolted spherical node is made to be greatly reduced dead weight on the basis of load-carrying properties are met, improves performance.
Description
Technical field
The utility model belongs to the technical field of bolted spherical node design, and in particular to a kind of Novel bolt ball node.
Background technology
At present, grid structure is with its reasonable stress, materials economy, handsome in appearance, and the advantages that covering larger space forms
More large span is pursued to meet current large span spatial structure, the development trend of more graceful shape is applied in architectural engineering
Extensively.Key components of the node as grid structure, account for the 20%~50% of total steel using amount.Therefore rational section
Point construction, degree of safety, manufacture installation, project progress, Steel consumption quota and project cost to structure all have a direct impact.
Grid structure node mainly has welded spherical node and bolted spherical node.Wherein bolted spherical node is generally shaped in factory
It generates in batch, on-site consolidation is convenient to mount and dismount suitable for the live duration is tight, execution conditions, electricity consumption are restricted, rack without welding
Complex-shaped, rod piece location difficulty polymorphic structure.Bolted spherical node is by bolt, steel ball, pin (or screw), sleeve and cone
The parts composition such as head or sealing plate, wherein steel ball is solid.Since the weight of solid steel ball is big, when diameter is more than 300mm
Solder sphere or cast steel node are all employed in engineering practice at present, the prominent defect of both one is site welding workload
Greatly, speed of application is slow, and quality is difficult to ensure that, especially with the development of Building technology, assembled architecture has become development
Trend, it is desirable that construction site uses bolted spherical node as possible.It is but original due to development of the structure to higher, span more general orientation
Minor diameter bolt sphere have been unable to meet the demand of engineering practice, such as《Elements of Space Grid Truss bolted spherical node JG/T10-2009》Middle spiral shell
Maximum gauge is only 300mm in the specification of bolt ball, and angle and node according to rod piece are usually required in current engineering practice
Larger load requirement is born and transmitted, bolt sphere is designed, the bolt sphere needed is very big.
Therefore, the production technology for establishing large diameter bolt ball is what very necessary and engineering practice was badly in need of.It realizes big
The key technology of diameter screw ball has at 2 points, first, medicine ball can cause node substance larger, causes dead load larger, influences
The security and stability of structure, while the installation difficulty at scene is also increased, how to ensure to be greatly reduced while load-carrying properties certainly
It is one of key technology be badly in need of solving and broken through again, second is that the manufacturing problem of large diameter bolt ball node, traditional machine
Bed processing method can not produce large diameter bolt ball.
Utility model content
The utility model is larger for the problem that bolted spherical node substance in the prior art, influences structure security and stability,
A kind of Novel major diameter bolted spherical node based on topological optimization is provided, bolt sphere of the diameter more than 300mm is optimized point
Analysis, can greatly reduce the dead weight of bolted spherical node on the basis of bolted spherical node load-carrying properties are met, improve bolt
The performance and security performance of ball node.
The utility model adopts the following technical solution：A kind of Novel bolt ball node, which is characterized in that including internal for sky
The steel ball of cavity configuration and be arranged on the steel ball, for connecting and carrying being in charge of for steel pole, the steel ball and be in charge of one into
Type, the steel ball spherical crown shape removed for part, and the tall and big radius in steel ball of spherical crown, are in charge of the normal direction along steel ball
Setting outward, and is in charge of along the circumferential direction of steel ball and is uniformly distributed, and described to be in charge of for solid construction, being in charge of has along normal direction
The counterbore of setting is provided with the curved surface rounded corner for making smooth abrupt transition between adjacent be in charge of, the steel on the surface of the steel ball
Ball surface have using be in charge of quantity, be in charge of position, be in charge of diameter, counter bore hole diameters as parameter be calculated through topological optimization with
The curve form that carried steel pole stress matches.
It is described be in charge of be in charge of including multigroup, on the steel ball be removed face be steel ball bottom surface, it is described it is multigroup be in charge of from
Steel ball top surface is sequentially distributed to bottom surface, and is respectively uniformly distributed per component pipe along the circumferential direction of steel ball.
The bottom being in charge of is not connected with cavity structure.
The counterbore is bolt hole.
The diameter of the steel ball is more than 300mm.
A diameter of 350~500mm of the steel ball.
A kind of method for preparing bolted spherical node is established simultaneously, is cast using evaporative pattern-sand mold composite casting technology
It makes, includes the following steps：
(1) it to be in charge of quantity, be in charge of position, be in charge of diameter, counter bore hole diameters as parameter, is designed using Topology Optimization Method
The three-dimensional structure of bolted spherical node；
(2) bolted spherical node threedimensional model is designed according to the result of topology optimization design, is distinguished according to the threedimensional model
Make foam threedimensional model and sand core threedimensional model；
(3) Foam Pattern of no cavity is produced according to foam threedimensional model, wooden model is carried out according to sand core threedimensional model
Make core；
(4) the Foam Pattern brushing thickness of no cavity is more than to the alcohol-base paint of 2mm；
(5) Foam Pattern for applying swiped through alcohol-base paint is inserted to the organic ester water-glass sand centainly matched and starts moulding, and
By sand mold cure process；
(6) foam in sand mold with failure mode is taken out, forms the cavity and the bolt hole；
(7) by cavity described in the sand core tripping in of Wooden Pattern Making and the bolt hole, and in wooden model external coating alcohol-base paint；
(8) mould assembling is cast；
(9) peeling, heat treatment, quality inspection；
(10) bolt hole is finished on lathe.
The beneficial effects of the utility model are as follows：The steel ball of bolted spherical node is hollow construction, is greatly reduced node
Dead weight, save material, effectively reduce difficulty of construction, steel ball and be in charge of integrated molding, avoid conventional bolt ball node
Middle steel ball surface and the weld stress concentration problem between being in charge of, improve the bearing capacity of this bolted spherical node, and improve section
The security and stability of point, the shape and structure of steel ball are obtained by topology optimization design, make the structure of entire bolted spherical node
It is improved, bolted spherical node form is succinct, beautiful, easy to connect, installation accuracy is high, and makes the usability of bolted spherical node
It can be optimized, bolted spherical node load path is clear and definite, and stress form is reasonable, and security and stability is high.
The quantity for the steel pole that can be connected on this bolted spherical node as needed sets being in charge of for respective numbers, that is, exists
Steel ball from top surface to bottom surface on be sequentially arranged respectively along steel ball it is circumferentially equally distributed it is multigroup be in charge of, greatly meet steel pole connection
Needs.The bottom being in charge of is not connected with cavity structure, ensures the reasonable stress and stability of bolted spherical node.The counterbore is
Bolt hole, the end of steel pole to be connected have bolt, and steel pole end bolt is fixedly connected with the bolt hole in described be in charge of, from
And realize being fixedly connected for steel pole and this bolted spherical node.The utility model is mainly more than diameter using the principle of topological optimization
The bolt sphere of 300mm optimizes analysis, obtains a kind of Novel bolt ball node, can be on the basis for meeting node load-carrying properties
The upper dead weight for greatly reducing bolt sphere.Preferably, the diameter of steel ball solves conventional bolt ball node between 350~500mm
In, the problem of bolt sphere is very big.
The utility model bolted spherical node is using the evaporative pattern-sand mold composite casting work for being suitble to complicated abnormal shape castings production
Skill is cast, and the high-freedom degree of evaporative pattern Foam Pattern design, Foam machining is not only utilized easily for combination process and price
Cheap advantage, the problem of avoiding deformation, carburetting, and remain sand casting fill type steady, casting composition, dimensionally stable
The advantages of.
Description of the drawings
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the embodiment of the utility model, for this
For the those of ordinary skill of field, without having to pay creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the dimensional structure diagram of the utility model；
Fig. 2 is the front view of the utility model；
Fig. 3 is the vertical view of the utility model；
Fig. 4 is the bottom view of the utility model；
Fig. 5 is the axonometric drawing of the utility model.
Specific embodiment
In order to make the technical purpose of the utility model, technical solution and advantageous effect clearer, below in conjunction with the accompanying drawings and
Specific embodiment is further illustrated the technical solution of the utility model.
As shown in fig. 1~fig. 5, the utility model Novel bolt ball node includes the internal steel ball 1 for cavity structure and sets
It puts on the steel ball 1, be in charge of 2 for connect and carry steel pole, the steel ball 1 is in charge of 2 integrated moldings, steel ball 1 with described
The spherical crown shape removed for part, and the part that the tall and big radius in steel ball of spherical crown, i.e. steel ball 1 are removed is less than steel ball 1 greatly
Small half, the face being removed using on steel ball is as the bottom surface 5 of steel ball, and the bottom surface 5 of the steel ball 1 is flat circle structure, steel ball 1
Inside have cavity structure 6.
It is in charge of 2 to set outward along the normal direction of steel ball 1, that is, the normal direction for being in charge of 2 axial direction and steel ball 1 is put down
Row, and is in charge of 2 and is uniformly distributed along the circumferential direction of steel ball 1, described to be in charge of 2 for solid construction, it is described be in charge of on 2 be provided with along
The counterbore 4 of normal direction setting is stated and is in charge of 2 bottom and is not connected with cavity structure 6, and in the present embodiment, counterbore 4 is bolt hole,
The end of steel pole to be connected has bolt, and steel pole end bolt is tightened with the bolt hole 4 being in charge of in 2 and connect, so as to real
Existing steel pole is fixedly connected with this bolted spherical node.
In the present embodiment, the steel ball 1 from top surface (face with bottom surface 5 spacing maximum on steel ball 1) to bottom surface 5, along steel
The normal direction of ball 1 is disposed with two component pipes, and one of which is in charge of close to the top surface of steel ball 1, and another component pipe is close to steel
The bottom surface 5 of ball 1, the number of being in charge of per component pipe is four, and be respectively uniformly distributed per component pipe along the circumferential direction of steel ball.
In the present embodiment, the surface of steel ball 1 is provided with two component pipes, and the number of being in charge of per component pipe is four, but this reality
With novel without being limited thereto, those skilled in the art are readily apparent that the number of the steel pole connected on this bolted spherical node as needed
Amount, sets being in charge of for respective numbers, and being in charge of for the respective numbers is embodied on this bolted spherical node, can be a component pipe,
Can also be it is multigroup be in charge of, it is described it is multigroup be in charge of be sequentially distributed from steel ball top surface to bottom surface, and per component pipe respectively along steel ball
Circumferential direction be uniformly distributed, the quantity of being in charge of per component pipe may be the same or different.
The steel ball 1 and be in charge of 2 integrated moldings, and the surface of steel ball 1 be provided with make it is adjacent be in charge of 2 between smooth abrupt transition
Curved surface rounded corner 3, using the main function of curved surface rounded corner 3 be to make each transition being in charge of between 2 smooth coherent on steel ball,
And make it is each be in charge of it is excessive smooth coherent between 2 and the surface of steel ball 1, avoid in conventional bolt ball node steel ball surface with
Weld stress concentration problem between being in charge of, while improve the bearing capacity of this bolted spherical node.According to being in charge of 2 position not
Together, the adjacent curved surface rounded corner being in charge of between 2 is also not exactly the same.
1 surface of steel ball has the curve form to match with carried steel pole stress being calculated through topological optimization, opens up
It is loading condition, constraints and performance indicator that a kind of basis gives to flutter optimization, material is distributed in given region into
The mathematical method of row optimization is one kind of structure optimization, the common software applied in existing engineering at present, those skilled in the art
It can normal use.
The utility model optimizes the shape and structure of steel ball using Topology Optimization Method, specifically, first,
According to the size of the bolt on the quantity for the steel pole for needing to connect on this bolted spherical node in engineering, steel pole, steel ball table is determined
The quantity being in charge of set and the diameter for being in charge of Inner bolt holes are needed on face；Secondly, the quantity being in charge of, bolt hole are designed (i.e.
Counterbore) diameter, it is in charge of diameter, the position being in charge of on steel ball surface；Finally, be in charge of quantity, be in charge of position, be in charge of diameter,
Bolt hole (i.e. counterbore) a diameter of parameter, using Topology Optimization Method to diameter more than 300mm steel ball shape and structure into
Row optimization design, the shape and structure of the steel ball be primarily referred to as the diameter of steel ball, the size for needing removed steel ball part,
The diameter of steel ball internal cavity, it is adjacent be in charge of between curved surface rounding radii, steel ball surface shape curvature etc..Wherein, root
Diameter and the diameter ratio for being in charge of 2 according to steel ball 1, cavity structure optimization processing is carried out to steel ball.It is obtained after topology optimization design
The utility model Novel bolt ball node.
In the present embodiment, the diameter of steel ball 1 is more than 300mm, is mainly more than 300mm to diameter using the principle of topological optimization
Steel ball optimize analysis, it is preferred that steel ball size be 350~500mm.
The utility model bolted spherical node is handled using the structure optimization of steel ball internal cavity, on the basis for meeting load-carrying properties
On, dead weight can greatly be reduced, material is saved, bolted spherical node is made preferably to be applied in grid structure, reduce bolt sphere
The installation difficulty of node；By the structure and shape of topology optimization design steel ball, make the utility model bolted spherical node power transmission road
Line is clear and definite, and stress form is reasonable.
Specifically, the utility model through topology optimization design steel ball size be respectively 350mm, 400mm, 450mm and
Four kinds of bolted spherical nodes of 500mm, two component pipes are respectively arranged on four kinds of bolted spherical nodes, and one of which is in charge of close to steel ball
Top surface, another component pipe is close to the bottom surface of steel ball, and the number of being in charge of per component pipe is four, per component pipe respectively along steel ball
Circumferential direction be uniformly distributed, define close to steel ball top surface it is adjacent be in charge of between curved surface rounded corner for top boom between chamfering, define
Close to steel ball top surface be in charge of with close to steel ball bottom surface it is adjacent be in charge of between curved surface rounded corner for web member between chamfering, specifically ginseng
Number is as shown in table 1：
For the superiority-inferiority of comparison the utility model Novel major diameter bolt sphere and traditional bolt sphere, choose respectively a diameter of
350mm Novel major diameters bolt sphere and conventional bolt ball, conventional bolt ball are medicine ball, and adjacent in conventional bolt ball surface
It is designed between being in charge of without curved surface rounded corner.Numerical simulation analysis is carried out using ANSYS, calculates two kinds of node in identical lotus
Stress distribution feature under the conditions of load.Comparative analysis knot is as shown in table 2：
| Type | Steel ball size/mm | Steel ball weight/Kg | Maximum stress/MPa |
| Novel major diameter bolt sphere | 350 | 97.4 | 203 |
| Conventional bolt ball | 350 | 176.2 | 188 |
By result it is found that the Novel major diameter bolt sphere of the utility model with traditional bolt sphere under identical diameter,
The weight of Novel major diameter bolt sphere is the 55.28% of conventional bolt ball.The maximum of conventional bolt ball under identical load action
Stress is Novel major diameter bolt sphere 92.6%.
The result shows that the utility model large diameter bolt ball of same diameter compares conventional bolt ball load-carrying properties almost phase
Together, but dead weight is to substantially reduce, and has effectively saved resource, while also improve stability and the safety of structure.From
Example has preferable application value as it can be seen that the utility model Novel major diameter bolt sphere is practicable.
The integrated poured molding of bolted spherical node is so that the overall structure of node is rigidly larger, present in casting technique
Problem, with reference to the experience of factory's actual production, the utility model bolted spherical node is disappeared using suitable complicated abnormal shape castings production
It loses mould-sand mold composite casting technology to be cast, the height of evaporative pattern Foam Pattern design is not only utilized freely in combination process
The problem of spending, the advantage that Foam machining is easy and cheap, avoiding deformation, carburetting, and remain sand casting and fill type
Steadily, the advantages of casting composition, dimensionally stable.
It is cast, is included the following steps using evaporative pattern-sand mold composite casting technology：
(1) it to be in charge of quantity, be in charge of position, be in charge of diameter, counter bore hole diameters as parameter, is designed using Topology Optimization Method
The three-dimensional structure of bolted spherical node；
(2) bolted spherical node threedimensional model is designed according to the result of topology optimization design, is distinguished according to the threedimensional model
Make foam threedimensional model and sand core threedimensional model；
(3) Foam Pattern of no cavity is produced according to foam threedimensional model, wooden model is carried out according to sand core threedimensional model
Make core；
(4) the Foam Pattern brushing thickness of no cavity is more than to the alcohol-base paint of 2mm；
(5) Foam Pattern for applying swiped through alcohol-base paint is inserted to the organic ester water-glass sand centainly matched and starts moulding, and
By sand mold cure process；
(6) foam in sand mold with failure mode is taken out, forms the cavity and the bolt hole；
(7) by cavity described in the sand core tripping in of Wooden Pattern Making and the bolt hole, and in wooden model external coating alcohol-base paint；
(8) mould assembling is cast；
(9) peeling, heat treatment, quality inspection；
(10) bolt hole is finished on lathe.
Wherein, since node is complex-shaped, for foam is avoided to deform in modeling process, the size essence of casting is influenced
Degree, therefore consider to only use the exterior contour that evaporative pattern makes node, and hollow cavity and threaded hole are then in addition with wooden model sand
Core is formed.
With respect to other sand molds, water-glass sand is of low cost, easy to operate, good compared with resin sand deformability, harmful without S, P etc.
Element, hardening process use organic ester hardening, and hardening process is convenient, and bleb, crackle are less, any surface finish, size essence
Degree improves.After the processes such as casting is thermally treated, chemical composition detection, flaw detection and dimensional measurement after unpacking, the finishing on lathe
Work bolt hole, qualification are that referable engineering uses.
The utility model carries out topological optimization processing to bolted spherical node, has the beneficial effect that：
(1) the utility model bolted spherical node substantially reduces the dead weight of node, saves material, improves the safety of node
Stability effectively reduces difficulty of construction；
(2) the utility model bolted spherical node form is succinct, beautiful, easy to connect, installation accuracy is high；
(3) the utility model bolted spherical node load path is clear and definite, and stress form is reasonable.
(4) can be set on the utility model bolted spherical node it is multigroup be in charge of, realize the needs connected to multiple steel poles.
(5) solve the problem of that bolt sphere is very big in conventional bolt ball node.
(6) the utility model bolted spherical node is cast using evaporative pattern-sand mold composite casting technology, makes design
Degree of freedom is high, at low cost, bolted spherical node any surface finish, and ingredient and dimensional accuracy are high.
It should be noted last that：The technical solution of the utility model that the above embodiments are only illustrative and not limiting is appointed
What to the utility model carry out equivalent replacement and do not depart from the spirit and scope of the utility model modification or part replace,
It should cover within the scope of the utility model claims protection.
Claims (6)
1. a kind of Novel bolt ball node, which is characterized in that including the internal steel ball for cavity structure and be arranged on the steel ball
Above, for connecting and carrying being in charge of for steel pole, the steel ball is with being in charge of integrated molding, the steel ball spherical crown removed for part
Shape, and the tall and big radius in steel ball of spherical crown, are in charge of along the normal direction of steel ball and set outward, and are in charge of along the circumferential equal of steel ball
Even distribution, it is described to be in charge of for solid construction, it is in charge of with the counterbore set along normal direction, is set on the surface of the steel ball
Being equipped with makes the curved surface rounded corner of smooth abrupt transition between adjacent be in charge of, the steel ball surface have be in charge of quantity, be in charge of position,
Be in charge of diameter, counter bore hole diameters by parameter be calculated through topological optimization with the curved that matches of carrying steel pole stress
Shape.
2. a kind of Novel bolt ball node according to claim 1, which is characterized in that it is described be in charge of be in charge of including multigroup,
On the steel ball be removed face be steel ball bottom surface, it is described it is multigroup be in charge of be sequentially distributed from steel ball top surface to bottom surface, and every group
It is in charge of and is respectively uniformly distributed along the circumferential direction of steel ball.
3. a kind of Novel bolt ball node according to claim 1 or 2, which is characterized in that the bottom being in charge of and sky
Cavity configuration does not connect.
4. a kind of Novel bolt ball node according to claim 3, which is characterized in that the counterbore is bolt hole.
5. a kind of Novel bolt ball node according to claim 4, which is characterized in that the diameter of the steel ball is more than
300mm。
6. a kind of Novel bolt ball node according to claim 5, which is characterized in that a diameter of the 350 of the steel ball ~
500mm。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721589607.3U CN207499150U (en) | 2017-11-24 | 2017-11-24 | A kind of Novel bolt ball node |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721589607.3U CN207499150U (en) | 2017-11-24 | 2017-11-24 | A kind of Novel bolt ball node |
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| CN207499150U true CN207499150U (en) | 2018-06-15 |
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ID=62506487
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829494A (en) * | 2017-11-24 | 2018-03-23 | 河南大学 | A kind of Novel bolt ball node and preparation method thereof |
| CN110905075A (en) * | 2019-11-22 | 2020-03-24 | 江苏中森建筑设计有限公司 | Prestressed space grid structure |
| CN112431303A (en) * | 2020-11-23 | 2021-03-02 | 东南大学 | Double-topology ring node applied to fabricated single-layer grid structure |
-
2017
- 2017-11-24 CN CN201721589607.3U patent/CN207499150U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829494A (en) * | 2017-11-24 | 2018-03-23 | 河南大学 | A kind of Novel bolt ball node and preparation method thereof |
| CN110905075A (en) * | 2019-11-22 | 2020-03-24 | 江苏中森建筑设计有限公司 | Prestressed space grid structure |
| CN112431303A (en) * | 2020-11-23 | 2021-03-02 | 东南大学 | Double-topology ring node applied to fabricated single-layer grid structure |
| CN112431303B (en) * | 2020-11-23 | 2021-12-07 | 东南大学 | Double-topology ring node applied to fabricated single-layer grid structure |
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