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estebro®
Documentación Técnica
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Documentação Técnica Technical Documents Documentation Technique
• ISO 9001: 2008 • ¿Puedes confirmar la seguridad de tus herrajes?. • Pesos máximos. • Software propio. • Simulación de consultas. • ISO 9001: 2008 • Pode você confirmar a segurança das suas ferragens? • Pesos máximos. • Software próprio. • Simulação de possiveis consultas.
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• ISO 9001: 2008 • Can you prove the security of your fittings? • Maximun weight. • Original software. • Simulation of possible consults.
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• ISO 9001: 2008 • Vous pouvez confirmer la sécurité de vos ferrures? • Poids maximum. • Logiciel spécifique estebro ®. • Exemples de possibles consultations.
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estebro速
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ISO 9001:2008
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estebro® Can you prove The Security of your fittings?
EN
The answer is:
D
ue to the lack of a current regulation that could regulate our products directly, estebro® with the objective of satisfying its consumers cooperates with the University of Zaragoza in the development of different studies about security standards for its manufactures. estebro® has also developed its own original software. We launched our first study about security in 2006 and our second study in 2008. All estebro®’s customers and consumers can take advantage of the study and the free service that estebro® offers. Knowing the basic characteristics of a door, such us its weight and dimension, the software developed allows us to obtain: the distribution of hinges throughout the edge of the door, calculate the maximum weight held by the hinges with a high security coefficient, calculate the number of hinges per door, the most adequate hinge depending on the door’s weight and simulate the possible deformations in extreme cases.
Good morning. I have to install a 4.000 mm x 2.500 mm door, it weights 400 kg. Could you please tell me which hinges or wheels do I have to use and the distances in between them? I do not want to have any security problems. Thank you!. Of course! As estebro®’s technical department we are happy to help you. Please give me your fax number or your email address and we will send you a drawing with the optimum distribution of the product that you should ensemble and the security coefficient.
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estebro® Maximun weight for doors dependig on different types of hinges. As you can see in the drawing. We have consider 3 hinges placed in a 1 m x 2 m door (1.000 mm x 2.000 mm) drawing. The maximum weight of the door which supports the distribution has been calculated. Round and drop steel - profile Size
Door´s Weight Kg
16x100
Round and drop stainlessl steel profile
Round profile-stainless steel. AISI 316
Size
Door´s Weight Kg
Size
Door´s Weight Kg
115*
16x100
175*
16x100
60
18x110
115*
18x110
175*
20x120
195
20x120
300
20x120
100
25x150
235
25x150
220**
25x150
125
30x150
350
35x150
820
Flag hinge Size
Door´s Weight Kg
16x100x3
60
18x110x4
75
20x120x5
80
25x120x5
140
30x150x6
145
We fix 2 hinges in a 1 m x 0,7 m (700 mm x 1000 mm) door and we have calculated what is the maximum door weight of the door that supports this distribution. Round and drop steel - profile Size
Door´s Weight Kg
Round and drop stainlessl steel profile Size
Door´s Weight Kg
8x50
19
8x50
22
10x60
27
10x60
38
12x70
38
12x70
52
14x80
45
14x80
65
Round profile-stainless steel. AISI 316 Size
12x70
Door´s Weight Kg
18
Flag hinge Size
Door´s Weight Kg
10x60x2
10
12x80x2
20
14x80x3
25
We consider 4 hinges, distributed in a 0,95 m x 2,1 m (950 mm x 2.100 mm) door. See the drawing on the left. We have calculated the maximum weight of the door that will support this distribution. Round and drop steel - profile Size
Door´s Weight Kg
16x100
Round and drop stainlessl steel profile
Round profile-stainless s. AISI 316
Size
Door´s Weight Kg
Size
Door´s Weight Kg
155*
16x100
240*
16x100
80
18x110
155*
18x110
240*
20x120
270
20x120
415
20x120
140
25x150
330
25x150
310**
25x150
175
30x150
480
35x150
1150
Flag hinge Size
Door´s Weight Kg
16x100x3
70
18x110x4
95
20x120
110
25x120x5
190
30x150x6
200
* Even though the maximum weight hold by the door for the two measures is the same, the more longitudinal hinge reduces the tension in the welding zone, adding more security for the door not to be pulled up. ** The maximum weight hold by the door lowers down in this measure due to the decrease of the elastic coefficient of the material. These caculations are made considering the security coefficient defined by matirial’s yield point
, where
is the equivalent stress of Von Mises and
is the
We have chosen the coefficient N = 4 for round and drop profile hinges, so that we can be sure that the fatigue life is infinite. Regarding the flag hinges, due to its constructive process, we have considered the coefficient N = 2 which guarantees a hinge’s life of about 10 years. These details will be valid as long as the hinges have correct use conditions, a correct use, a correct installation and a correct maintanance.
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estebro®
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ORIGINAL SOFTWARE. Our software allows us to obtain: • The optimal layout of our hinges on the door. • The number of hinges per door. • The most adequate hinge to install, depending on the weight and dimensions of the door. •Simulate the possible deformations in extreme cases. •Give us advise about the layout of other estebro®’s products. Moreover, we can simulate, in extreme cases, the stress state, stress map and deformation of the axle and the hinge.
Fig 1. The stress map of an axle working in the security zone. In the figure we can see how the higher concentrations of tensions are produced in the border between sections. This could cause irreversible deformations in the area up to the point of provoking the breakage of the axel.
Fig 2. The axle deformation working in the security zone in an exaggerated scale. Here we can notice how the higher displacement is produce at the end of the axle referring to the longitudinal axle as it was expected.
Fig 3. The stress map of a flag hinge working in the security zone. In the figure we can recognize how the higher concentration of tensions are produce in the wing and in the flag’s fold.
Fig 4. The flag hinge deformation working in the security zone, in an exaggerated scale. As we saw in the stress map the higher displacement takes place forcing the opening of the flag.
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estebro速 Simulation of possible consults. Consult 1
I have to install a 400 kg door, the dimensions are: 4 m x 6 m, vertical axle. Which size of round profile hinge, do you advise me to use?. Which is the optimum distribution if I only want to use 5 hinges?.
TECHNICAL DEPARTMENT ANSWER With 5 round profile hinges of 30 mm x150 mm distributed like you can see in the drawing, you would have a minimum security coefficient of N=4. Thanks for ralaying on us.
Consult 2
Excuse me; I have spoken to you this morning about a door consult. I have given you the wrong dimensions of the door; the correct dimensions are: 6 m x 4 m. Could you calculate it again for me, please?.
TECHNICAL DEPARTMENT ANSWER: In this case, to maintain a N=4 security, we should increase the size. Our recommendation is: 5 hinges of 35 mm x150 mm distributed according to the drawing. Thanks again for ralaying on us.
Consult 3
I have to install a 275 kg door; the dimensions are 1,5 m x 3 m, vertical axle. Which size of round profile hinge (AISI 303) do you advice me to use?. How many and which would be the optimum distribution?
TECHNICAL DEPARTMENT ANSWER Due to the hinge resistance, we should place 3 round profile hinges AISI 303 20 mm x120 mm distributed according to the drawing, to insure a minimum security coefficient of N=4. Moreover, if we want to avoid possible problems with the welding, our advice is to use 3 hinges with the same measure but with a drop profile. Thanks for trusting us.
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