Constant force springs - Revision history

Designing Buildings at 08:08, 30 December 2020

2020-12-30T08:08:25Z

← Older revision		Revision as of 08:08, 30 December 2020
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	* Types of spring.		* Types of spring.

−	[[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Designing Buildings at 16:11, 23 November 2018

2018-11-23T16:11:28Z

← Older revision		Revision as of 16:11, 23 November 2018
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−	== Introduction ==	+	= Introduction =

	Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force springs are created from pre-tensioned metal strips instead of wire. They fall under the ‘extension spring’ category and are designed to provide tension in a linear direction.		Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force springs are created from pre-tensioned metal strips instead of wire. They fall under the ‘extension spring’ category and are designed to provide tension in a linear direction.

−	== What are constant-force springs? ==	+	= What are constant-force springs? =

	Despite their name, these springs don’t provide true constant force; the initial force starts from a finite value. Constant-force springs resemble a wound coil and, because the force to restore the unrolled spring is nearest the roll, there is almost no restriction when it comes to speed of extension or acceleration.		Despite their name, these springs don’t provide true constant force; the initial force starts from a finite value. Constant-force springs resemble a wound coil and, because the force to restore the unrolled spring is nearest the roll, there is almost no restriction when it comes to speed of extension or acceleration.

−	After the spring is deflected to a length equal to 1.25 times its diameter, it reaches full load and maintains a relatively constant force independent of the length of the extension. The fatigue life of these springs can range anywhere from 2,500 cycles to more than one million, ~~which will depend~~ on the size and load of the spring.	+	After the spring is deflected to a length equal to 1.25 times its diameter, it reaches full load and maintains a relatively constant force independent of the length of the extension. The fatigue life of these springs can range anywhere from 2,500 cycles to more than one million, depending on the size and load of the spring.

−	The unique qualities of these springs make them ~~very~~ valuable as a counterbalance for heavy moving parts as well. An example is a van door, which requires an extra ‘push’ before closing. Once that initial force is overcome, the door slides with ease and with near constant force.	+	The unique qualities of these springs make them valuable as a counterbalance for heavy moving parts as well. An example is a van door, which requires an extra ‘push’ before closing. Once that initial force is overcome, the door slides with ease and with near constant force.

−	== How to choose a constant-force spring ==	+	= How to choose a constant-force spring =

−	It’s important to take several factors into consideration before choosing a constant-force spring for a project. The material used in making the spring (as well as its width and thickness) is one of them. Usually, in order to create high-quality constant-force springs, stainless steel grade 301 is chosen, although high-carbon steel, Inconel and other materials can also be suitable.	+	It’s important to take several factors into consideration before choosing a constant-force spring.

−	The ~~initial load or force that the springs will have to overcome to reach ‘constant force’ also matters when it comes to designing~~ the spring, as ~~does~~ its ~~internal~~ and ~~external diameters. Equally key~~ is ~~the end detail~~ of ~~the spring~~, ~~which means the outside ends that will attach~~ to other ~~parts and components act directly to coil or uncoil it~~.	+	The material used in making the spring (as well as its width and thickness) is one of them. Usually, in order to create high-quality constant-force springs, stainless steel grade 301 is chosen, although high-carbon steel, Inconel and other materials can also be suitable.

−	~~Because tolerances and requirements~~ will ~~vary, depending on~~ the ~~industry~~ and the ~~application~~ of the ~~component~~, ~~it’s crucial that~~ the ~~constant-force spring is manufactured with this in mind as well~~.	+	The initial load or force that the springs will have to overcome to reach ‘constant force’ also matters when it comes to designing the spring, as does its internal and external diameters. Equally important is the end detail of the spring, which means the outside ends that will attach to other parts and components to coil or uncoil it.

−	~~== Common applications~~ of constant-force springs ==	+	Because tolerances and requirements will vary, depending on the industry and the application of the component, it is crucial that constant-force springs are manufactured with this in mind as well.

−	Constant-force springs are useful in a variety of applications~~, which make them incredibly important for many different industries~~, such as automotive, aerospace, medical and retail. Some of their most popular uses include:	+	= Common applications of constant-force springs =
		+
		+	Constant-force springs are useful in a variety of applications, such as; automotive, aerospace, medical and retail.
		+
		+	Some of their most popular uses include:

	* Door closers		* Door closers
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	* Vacuum cleaner cords		* Vacuum cleaner cords

−	== Limitations of constant-force springs ==	+	= Limitations of constant-force springs =

−	Just like other types of springs, external factors can contribute to ~~the~~ reduced lifespan of a constant-force spring. This can include anything from exposure to corrosive elements, which can also affect its performance, to extreme temperatures.	+	Just like other types of springs, external factors can contribute to a reduced lifespan of a constant-force spring. This can include anything from exposure to corrosive elements, which can also affect its performance, to extreme temperatures.

	--[[User:European_Springs_and_Pressings_Ireland_Ltd\|European Springs and Pressings Ireland Ltd]]		--[[User:European_Springs_and_Pressings_Ireland_Ltd\|European Springs and Pressings Ireland Ltd]]
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	* Spring materials.		* Spring materials.
	* Tension springs v torsion springs.		* Tension springs v torsion springs.
		+	* Types of spring.

−	[[Category:Products_/_components]]	+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings: moved Constant-force springs and why they’re important to Constant force springs

2018-11-23T16:07:03Z

moved Constant-force springs and why they’re important to Constant force springs

← Older revision

Revision as of 16:07, 23 November 2018

Editor at 16:34, 6 November 2018

2018-11-06T16:34:03Z

← Older revision		Revision as of 16:34, 6 November 2018
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	Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force springs are created from pre-tensioned metal strips instead of wire. They fall under the ‘extension spring’ category and are designed to provide tension in a linear direction.		Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force springs are created from pre-tensioned metal strips instead of wire. They fall under the ‘extension spring’ category and are designed to provide tension in a linear direction.

−	== What are ~~Constant~~-~~Force Springs~~? ==	+	== What are constant-force springs? ==

	Despite their name, these springs don’t provide true constant force; the initial force starts from a finite value. Constant-force springs resemble a wound coil and, because the force to restore the unrolled spring is nearest the roll, there is almost no restriction when it comes to speed of extension or acceleration.		Despite their name, these springs don’t provide true constant force; the initial force starts from a finite value. Constant-force springs resemble a wound coil and, because the force to restore the unrolled spring is nearest the roll, there is almost no restriction when it comes to speed of extension or acceleration.
Line 11:		Line 11:
	The unique qualities of these springs make them very valuable as a counterbalance for heavy moving parts as well. An example is a van door, which requires an extra ‘push’ before closing. Once that initial force is overcome, the door slides with ease and with near constant force.		The unique qualities of these springs make them very valuable as a counterbalance for heavy moving parts as well. An example is a van door, which requires an extra ‘push’ before closing. Once that initial force is overcome, the door slides with ease and with near constant force.

−	== How to ~~Choose~~ a ~~Constant~~-~~Force Spring~~ ==	+	== How to choose a constant-force spring ==

	It’s important to take several factors into consideration before choosing a constant-force spring for a project. The material used in making the spring (as well as its width and thickness) is one of them. Usually, in order to create high-quality constant-force springs, stainless steel grade 301 is chosen, although high-carbon steel, Inconel and other materials can also be suitable.		It’s important to take several factors into consideration before choosing a constant-force spring for a project. The material used in making the spring (as well as its width and thickness) is one of them. Usually, in order to create high-quality constant-force springs, stainless steel grade 301 is chosen, although high-carbon steel, Inconel and other materials can also be suitable.
Line 19:		Line 19:
	Because tolerances and requirements will vary, depending on the industry and the application of the component, it’s crucial that the constant-force spring is manufactured with this in mind as well.		Because tolerances and requirements will vary, depending on the industry and the application of the component, it’s crucial that the constant-force spring is manufactured with this in mind as well.

−	== Common ~~Applications~~ of ~~Constant~~-~~Force Springs~~ ==	+	== Common applications of constant-force springs ==

	Constant-force springs are useful in a variety of applications, which make them incredibly important for many different industries, such as automotive, aerospace, medical and retail. Some of their most popular uses include:		Constant-force springs are useful in a variety of applications, which make them incredibly important for many different industries, such as automotive, aerospace, medical and retail. Some of their most popular uses include:
Line 36:		Line 36:
	* Vacuum cleaner cords		* Vacuum cleaner cords

−	== Limitations of ~~Constant~~-~~Force Springs~~ ==	+	== Limitations of constant-force springs ==

	Just like other types of springs, external factors can contribute to the reduced lifespan of a constant-force spring. This can include anything from exposure to corrosive elements, which can also affect its performance, to extreme temperatures.		Just like other types of springs, external factors can contribute to the reduced lifespan of a constant-force spring. This can include anything from exposure to corrosive elements, which can also affect its performance, to extreme temperatures.
		+
		+	--[[User:European_Springs_and_Pressings_Ireland_Ltd\|European Springs and Pressings Ireland Ltd]]
		+
		+	= Related articles on Designing Buildings Wiki =
		+
		+	* Clock spring.
		+	* Force.
		+	* Key qualities of springs.
		+	* Spring materials.
		+	* Tension springs v torsion springs.

	[[Category:Products_/_components]]		[[Category:Products_/_components]]

Editor: moved Constant-Force Springs and Why They’re Important to Constant-force springs and why they’re important

2018-11-06T16:31:33Z

moved Constant-Force Springs and Why They’re Important to Constant-force springs and why they’re important

← Older revision

Revision as of 16:31, 6 November 2018

European Springs and Pressings Ltd: Created page with "== Introduction == Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force..."

2018-09-27T15:31:17Z

Created page with "== Introduction == Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force..."

New page

== Introduction ==

Constant-force springs differ from other springs, such as helically wound springs (although they do obey Hooke’s Law). This is mainly because constant-force springs are created from pre-tensioned metal strips instead of wire. They fall under the ‘extension spring’ category and are designed to provide tension in a linear direction.

== What are Constant-Force Springs? ==

Despite their name, these springs don’t provide true constant force; the initial force starts from a finite value. Constant-force springs resemble a wound coil and, because the force to restore the unrolled spring is nearest the roll, there is almost no restriction when it comes to speed of extension or acceleration.

After the spring is deflected to a length equal to 1.25 times its diameter, it reaches full load and maintains a relatively constant force independent of the length of the extension. The fatigue life of these springs can range anywhere from 2,500 cycles to more than one million, which will depend on the size and load of the spring.

The unique qualities of these springs make them very valuable as a counterbalance for heavy moving parts as well. An example is a van door, which requires an extra ‘push’ before closing. Once that initial force is overcome, the door slides with ease and with near constant force.

== How to Choose a Constant-Force Spring ==

It’s important to take several factors into consideration before choosing a constant-force spring for a project. The material used in making the spring (as well as its width and thickness) is one of them. Usually, in order to create high-quality constant-force springs, stainless steel grade 301 is chosen, although high-carbon steel, Inconel and other materials can also be suitable.

The initial load or force that the springs will have to overcome to reach ‘constant force’ also matters when it comes to designing the spring, as does its internal and external diameters. Equally key is the end detail of the spring, which means the outside ends that will attach to other parts and components act directly to coil or uncoil it.

Because tolerances and requirements will vary, depending on the industry and the application of the component, it’s crucial that the constant-force spring is manufactured with this in mind as well.

== Common Applications of Constant-Force Springs ==

Constant-force springs are useful in a variety of applications, which make them incredibly important for many different industries, such as automotive, aerospace, medical and retail. Some of their most popular uses include:

* Door closers
* Cable retractors
* Hose retrievers
* Gym equipment
* Hairdryers
* Toys
* Electric motors
* Space vehicles
* Furniture components
* MRI and x-ray machines
* Retractable dog leashes
* Vacuum cleaner cords

== Limitations of Constant-Force Springs ==

Just like other types of springs, external factors can contribute to the reduced lifespan of a constant-force spring. This can include anything from exposure to corrosive elements, which can also affect its performance, to extreme temperatures.

[[Category:Products_/_components]]