如何实现线形弹簧与氮气弹簧的转换
发表时间：2018-09-04 11:45浏览量：
1. 首先决定压力需求
在转换的过程中，第一步是要知道现有的模具所需的压力要求，如果您知道完成操作的所需压力，可直接采用相应吨位的氮气弹簧。
如果您不知道您所需总的压力，可通过计算模具中原有线形弹簧所提供的总压力求出。同时，您必须要清楚所需压力是初始压力（预压）
还是最终压力（满冲程），一旦知道了这些，您可得到您所需总的压力需求。
找出线形弹簧压力的最常用的办法是查阅制造商的产品压力图表，通过图表，您可知道模具中线形弹簧的规格，颜色，预压和冲程，
也可使用测压计来得出弹簧的压力。
当您得出模具中一只线形弹簧的压力，乘以弹簧的数量， 也可得到总的压力。
Example: Ten .75"(19 mm) x 5" (127 mm) diameter coil springs each provide 80 lbs.
(.3 kN) of initial force when preloaded .75"
(19 mm). Total Initial Force = 80 lbs. (.36 kN) x 10 = 800 lbs. (3.6 kN) of force
2. 计算氮气弹簧数量
首先，氮气弹簧的直径要与线形弹簧的直径相符，氮气弹簧提供了所有与常用的线形弹簧相匹配的直径：从 .75" (19 mm) 到 2" (51 mm) ，
当需要决定所需的氮气弹簧的数量时，可用相同直径压力最大的氮气弹簧的压力除以所需总的压力即可。通常情况下，很少要求弹簧提供的压力与所需压力相同。但是，请记住，所提供的压力要在垫板上均匀分布，在设计时，
您可采用较多具有较低压力的弹簧在模具中实现这个要求。
Example: A .75" (19mm) diameter gas spring is available in a 200 lbs. (.9 kN) force model. Divide total force required by gas spring force to determine gas spring quantity. Quantity = 800 lbs. (3.6 kN) ÷ 200 lbs. (.9 kN) = 4 If necessary to balance pressure in your application, you may choose a lower force model and increase the number of gas springs.
3. Select Gas Spring Stroke Length
The final factor to consider when selecting the gas spring is the stroke length. To choose the right gas spring stroke length, first determine the distance the coil spring travels in the die. Add a minimum of 10% to the coil spring travel and choose the gas spring stroke length that is equal to or greater than this number.
Example: In our example, the coil spring measures 5" (127 mm) free length, is preloaded .75" (19 mm) and is traveled .75" (19 mm) in the die. Add 10% to coil spring travel to determine minimum gas spring stroke length. Minimum stroke length = .75" (19 mm) + (.75" (19 mm) x 10%) = .825" (21 mm).
Once you have determined the minimum gas spring stroke length you can then select the particular stroke length that is best suited to your space requirements. For example, if your application requires that you preload the gas spring, select a stroke length that is greater than the minimum length to allow for preload. When possible, select the stroke length so that the OAL of the gas spring is as close as possible to OAL of the preloaded coil spring.
Example: The coil spring is preloaded .75" (19 mm) to meet the force requirements. Its OAL at preload is 4.25" (108 mm). In this example you could select the gas spring with a .98" (25 mm) stroke. This spring would have a corresponding OAL of 3.62" (92 mm). Alternatively, you may select a longer stroke and preload the gas spring to meet your space constraints. In our example, a spring with a stroke length of 1.5" (38 mm) and an OAL of 4.65 (118 mm) could be selected and preloaded .40" (10 mm).
4. 安装氮气弹簧
In most applications the nitrogen gas spring can be easily installed in the same cored pocket used for the coil spring. Simply ensure that the bottom of the pocket is flat and that the sides of the hole are square to the pressure pad. The pocket depth should be a minimum of 50% of the length of the gas spring can or 1.25" (32mm), whichever is greater. The pressure pad should have a smooth area for the gas spring rod to contact and should remain in contact with the rod throughout the stroke. In some applications you can take advantage of gas spring mounting options, such as attachable flange mounts, tapped hole(s) in the base of the cylinder, and threaded body styles. These options offer increased flexibility for using nitrogen gas springs in existing dies.
When the size of the gas spring selected does not match the coil spring being replaced there are simple steps that can be taken before installing the gas spring. Spacers or sleeves may be used in the pocket if the gas spring is smaller than the coil spring, or the gas spring may be flange mounted in the appropriate position. If the existing pocket is too shallow it may be cored deeper, if possible, or the gas spring may be preloaded to meet space requirements. When coring a pocket for gas spring installation, maintain a clearance of .02 to .04 in. (.5 to 1.0 mm) to the diameter of the gas spring.
One final concern when installing the gas spring is the use of fluids in the die. Direct contact with certain die lubricants, coolants and cleaners can be harmful to gas springs and should be avoided. Shield gas springs from harmful fluids and provide adequate drainage in gas spring pockets.
在转换的过程中，第一步是要知道现有的模具所需的压力要求，如果您知道完成操作的所需压力，可直接采用相应吨位的氮气弹簧。
如果您不知道您所需总的压力，可通过计算模具中原有线形弹簧所提供的总压力求出。同时，您必须要清楚所需压力是初始压力（预压）
还是最终压力（满冲程），一旦知道了这些，您可得到您所需总的压力需求。
找出线形弹簧压力的最常用的办法是查阅制造商的产品压力图表，通过图表，您可知道模具中线形弹簧的规格，颜色，预压和冲程，
也可使用测压计来得出弹簧的压力。
当您得出模具中一只线形弹簧的压力，乘以弹簧的数量， 也可得到总的压力。
Example: Ten .75"(19 mm) x 5" (127 mm) diameter coil springs each provide 80 lbs.
(.3 kN) of initial force when preloaded .75"
(19 mm). Total Initial Force = 80 lbs. (.36 kN) x 10 = 800 lbs. (3.6 kN) of force
2. 计算氮气弹簧数量
首先，氮气弹簧的直径要与线形弹簧的直径相符，氮气弹簧提供了所有与常用的线形弹簧相匹配的直径：从 .75" (19 mm) 到 2" (51 mm) ，
当需要决定所需的氮气弹簧的数量时，可用相同直径压力最大的氮气弹簧的压力除以所需总的压力即可。通常情况下，很少要求弹簧提供的压力与所需压力相同。但是，请记住，所提供的压力要在垫板上均匀分布，在设计时，
您可采用较多具有较低压力的弹簧在模具中实现这个要求。
Example: A .75" (19mm) diameter gas spring is available in a 200 lbs. (.9 kN) force model. Divide total force required by gas spring force to determine gas spring quantity. Quantity = 800 lbs. (3.6 kN) ÷ 200 lbs. (.9 kN) = 4 If necessary to balance pressure in your application, you may choose a lower force model and increase the number of gas springs.
3. Select Gas Spring Stroke Length
The final factor to consider when selecting the gas spring is the stroke length. To choose the right gas spring stroke length, first determine the distance the coil spring travels in the die. Add a minimum of 10% to the coil spring travel and choose the gas spring stroke length that is equal to or greater than this number.
Example: In our example, the coil spring measures 5" (127 mm) free length, is preloaded .75" (19 mm) and is traveled .75" (19 mm) in the die. Add 10% to coil spring travel to determine minimum gas spring stroke length. Minimum stroke length = .75" (19 mm) + (.75" (19 mm) x 10%) = .825" (21 mm).
Once you have determined the minimum gas spring stroke length you can then select the particular stroke length that is best suited to your space requirements. For example, if your application requires that you preload the gas spring, select a stroke length that is greater than the minimum length to allow for preload. When possible, select the stroke length so that the OAL of the gas spring is as close as possible to OAL of the preloaded coil spring.
Example: The coil spring is preloaded .75" (19 mm) to meet the force requirements. Its OAL at preload is 4.25" (108 mm). In this example you could select the gas spring with a .98" (25 mm) stroke. This spring would have a corresponding OAL of 3.62" (92 mm). Alternatively, you may select a longer stroke and preload the gas spring to meet your space constraints. In our example, a spring with a stroke length of 1.5" (38 mm) and an OAL of 4.65 (118 mm) could be selected and preloaded .40" (10 mm).
4. 安装氮气弹簧
In most applications the nitrogen gas spring can be easily installed in the same cored pocket used for the coil spring. Simply ensure that the bottom of the pocket is flat and that the sides of the hole are square to the pressure pad. The pocket depth should be a minimum of 50% of the length of the gas spring can or 1.25" (32mm), whichever is greater. The pressure pad should have a smooth area for the gas spring rod to contact and should remain in contact with the rod throughout the stroke. In some applications you can take advantage of gas spring mounting options, such as attachable flange mounts, tapped hole(s) in the base of the cylinder, and threaded body styles. These options offer increased flexibility for using nitrogen gas springs in existing dies.
When the size of the gas spring selected does not match the coil spring being replaced there are simple steps that can be taken before installing the gas spring. Spacers or sleeves may be used in the pocket if the gas spring is smaller than the coil spring, or the gas spring may be flange mounted in the appropriate position. If the existing pocket is too shallow it may be cored deeper, if possible, or the gas spring may be preloaded to meet space requirements. When coring a pocket for gas spring installation, maintain a clearance of .02 to .04 in. (.5 to 1.0 mm) to the diameter of the gas spring.
One final concern when installing the gas spring is the use of fluids in the die. Direct contact with certain die lubricants, coolants and cleaners can be harmful to gas springs and should be avoided. Shield gas springs from harmful fluids and provide adequate drainage in gas spring pockets.
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