Merchandise Description
Hiwin, abba, THK, sbc, nb, tbi
Linear manual, linear guideway, ball screw
HIWIN linear guide, linear guideway, ball screw linear guide, linear CZPT bearing, linear motion bearing, ballscrew
HIWIN - HGW, HGH, EGW, EGH, HGR, EGR
HGH-CA /HA HGW-CA/HA EGH-SA/CA EGW-SA/SB MGN-C/H MGW-C/H
HGH15CA HGH20CA HGH20HA HGH25CA HGH25HA HGH30CA HGH30HA HGH35CA HGH35HA HGH45CA HGH45HA HGH55CA HGH55HA HGH65CA HGH65HA
HGW15CA HGW20CA HGW20HA HGW25CA HGW25HA HGW30CA HGW30HA HGW35CA HGW35HA HGW45CA HGW45HA HGW55CA HGW55HA HGW65CA HGW65HA
HGW15CB HGW20CB HGW20HB HGW25CB HGW25HB HGW30CB HGW30HB HGW35CB HGW35HB HGW45CB HGW45HB HGW55CB HGW55HB HGW65CB HGW65HB
HGW15CC HGW20CC HGW20HC HGW25CC HGW25HC HGW30CC HGW30HC HGW35CC HGW35HC HGW45CC HGW45HC HGW55CC HGW55HC HGW65CC HGW65HC
EGH15SA EGH15CA EGH20SA EGH20CA EGH25SA EGH25CA EGH30SA EGH30CA
EGW15SA EGW15CA EGW20SA EGW20CA EGW25SA EGW30SA EGW30CA
EGW15SB EGW15CB EGW20SB EGW20CB EGW25SB EGW25CB EGW30SB EGW30CB
MGN7C MGN9C MGN12C MGN15C MGW7C MGW9C MGW12C MGW15C MGN7H MGN9H MGN12H MGN15H
Ball Screws - Dimensions, Purposes, and Advantages
Ball screws are well-known, lightweight, precision mechanical factors. They are commonly utilised in equipment, gears, and knurled objects. These screw-like elements can be easily managed and lubricated making use of oil. This report discusses their proportions, applications, and rewards. The subsequent sections offer additional data to aid you decide on the proper ball screw for your needs. We are going to go over some of the critical qualities of ball screws and what tends to make them so beneficial.
Preloading
A essential difficulty with nut-to-ball screw backlash is the capacity of the nut to move freely on the threads of the ball screw. To remedy this difficulty, a patented remedy was developed. The patent, 4,557,156, describes an revolutionary technique for preloading ball screws and nuts. By applying a preloading nut, the threads of the ball screw are prevented from relocating again and forth with the nut.
A mechanical style that entails axial play entails a good deal of mass, inertia, and complexity. These characteristics lead to dress in and rust troubles. Preloading ball screws using a dynamic program reduces mechanical complexity by allowing preload to be adjusted while the mechanism is managing. This also reduces the number of mechanical components and simplifies manufacturing. As a result, the preloading method of the present creation is useful.
The servo motors used in the technique check the output torque and alter the power to one particular motor in a dynamic way, therefore making a torque differential among the balls. This torque differential in change produces a preload force between the ball nuts. The servo motors' output torque is managed in this manner, and the machine's backlash clearance can be specifically managed. Hence, the machine can execute several responsibilities with enhanced precision.
Numerous prior art methods for preloading ball screws are explained in detail in FIG. 3. The helical thread grooves of the ball screw 26 and the nut 24 determine a pathway for roller balls to journey alongside. The stylized broken line indicates the basic situation of the axis of the ball roller screw 26. The corresponding ball screws are used in a quantity of applications. This approach might be employed to manufacture personalized-sized screws.
Lubrication
Ball screws are mechanical aspects that roll balls by way of a groove. Poor lubrication can lessen the existence of these screw factors. Inappropriate lubrication can guide to shaft harm, malfunction, and reduced performance. This write-up discusses the value of correct lubrication and how to do it. You can learn how to appropriately lubricate ball screws in the following paragraphs. Below are some suggestions to make sure long-time period overall performance and safety of ball screws.
The first issue you need to do is determine the variety of lubricant you will be making use of. Oils are chosen due to the fact they tend to continue being inside of the ball nut, and grease can construct up in it. Oils also tend to have far better anti-corrosion properties than grease. Nonetheless, grease is more probably to be clogged with particles than oils. So, before you select the lubricant that is appropriate for your screw, make confident you clean it off.
The oil utilized in ball screw lubrication must be applied at a controlled price. It can prevent metal-on-steel get in touch with and cleanse out contaminants as it passes through the ball nut. Nevertheless, oil as a lubricant is expensive and can contaminate the process if it mixes with the cutting fluid. Grease, on the other hand, is economical, needs less purposes, and does not contaminate approach fluids.
If you use a artificial oil for lubrication, make positive to select a viscosity that is appropriate for the operating temperature. Oil viscosity can improve the temperature of the ball screw assembly, and too much oil can lessen its life. A right volume of oil will minimize the temperature of the ball screw assembly, whilst also tiny will increase friction and dress in. Use the following suggestions to determine the correct sum of oil for your screw.
Dimensions
Dimensions of ball screws are a extremely essential aspect to take into account when deciding the ideal variety for your application. Technical acceptance conditions for ball screws specify the allowed deviations in the course of acceptance tests. The tolerance course can also change, relying on the needs of a particular software. The pursuing desk lists the most crucial tolerance values for the complete assortment of screw lengths. This desk is a useful guidebook when searching for a distinct screw. The table beneath lists the dimensions of common ball screws.
The axial load used to a ball screw is .5 x Fpr / 2Fpr. The least screw diameter is acknowledged as the root diameter. The axial load brings about the screw shaft to deform in a specified way (DL1 and DL2). The elastic deflection induced by the load on a ball screw is referred to as its rigidity. This rigidity is crucial for calculating sizing parameters for a ball screw.
The preload value of the ball screw impacts the dynamic load capacity. A preload of ten p.c is deemed adequate, even though a price better than this may possibly compromise the screw's sturdiness. In common, a substantial preload benefit will result in a decrease dynamic load capacity and better put on. Even so, the preload value need to be calculated with the related screw parameters. This is simply because a high preload value lowers the screw's longevity.
To make sure that your screw fulfills the specified parameters, the dynamic load ability must be calculated. This is the volume of force a ball screw will endure under a specified load. This calculation also involves toughness checks. If you are utilizing a ball screw for purposes that want additional power, it could demand a basic safety element. For instance, if the screw is employed for double-axial mounting, then the outer ball nut should be inserted into the nut, triggering a secondary load.
Applications
The existing creation gives a simple, however extremely effective way to mount a ball screw. Its absence of insert slots or by means of holes makes it simpler to assemble and supplies a a lot more uniform nut. The deficiency of mechanical functions also minimizes warmth therapy concerns, and the nut's hardness can be uniformly hardened. As a consequence, the screw's overall performance is improved. Right here are some examples of apps for ball screws.
Preloading is the process of implementing pressure to a ball screw. This boosts the rigidity of the screw assembly and removes backlash, which is misplaced motion induced by clearance amongst the nut and ball. Backlash disrupts repeatability and accuracy. Spacer preloading entails inserting pressure among two ball nuts and transmitting it via the grooves. This method is perfect when preloading is necessary in big quantities. In addition to escalating rigidity, preloading can boost precision.
Ball screws need mindful treatment in their functioning surfaces to stop contamination. Rubber or leather-based bellows can be used to shield their surfaces, even though optimistic air strain can be used to the screw. Preloading removes backlash, a frequent dilemma among screw assemblies. In addition to the several purposes for ball screws, they are also vital to computer-managed movement-management techniques and wire bonding. And there are numerous a lot more illustrations. So what are the benefits of using these units?
The spring preloading system uses a spring in amongst two ball nuts, applying tensional forces to the ball nuts. This spring produces grooves in the nut's middle, which facilitates recirculation of the balls. The spring preloading mechanism is more compact than the double nut system, but the lengthening of the guide reduces the ball screw's load capability. Its compact design tends to make it perfect for little clearance assemblies.
Maintenance
In addition to carrying out upkeep responsibilities by yourself, the maker of ball screws must supply reverse engineering providers that will enable them to identify certain troubles. The approach of reverse engineering enables ball screw makers to develop new ball screws and elements. In the event that a ball screw is over and above fix, a producer can typically help save a considerable volume of cash by restoring it alternatively of changing it. In addition to restoring a ball screw, the maker must also supply free analysis solutions for the part. Reconditioning and substitute require the use of new components, while reloading and substitute replace the screw.
Executing regimen upkeep checks on ball screw assemblies is crucial for maintaining optimal functionality and extending their service daily life. Time beyond regulation, abnormal use can guide to a variety of difficulties, such as backlash, vibration, and ball bearing sound. In addition, the elevated friction increases the needed torque for turning a screw, creating technique failure and significant downtime. To guarantee that a ball screw is completely functional, it should be checked for use and preserve the suitable lubrication system.
Discoloration or pitting on a ball screw suggests that it is in need to have of restore. The same is correct if there are chatter marks in the ball groove. Quite often, a ball screw requirements a new lubrication seal or wipers. Additionally, it could be lacking or over-putting on, which could consequence in long term failure. Ultimately, too much electricity draw could be a indication of incorrect lubrication or incorrect set up.
Proper maintenance is crucial for any device resource. When performed effectively, equipment equipment can final decades with continuous use. Proper care and maintenance is crucial to ensure lengthy existence and optimum performance. In addition to enhancing machine tool uptime, correct upkeep impacts the accuracy and repeatability of the conclude solution. As a result, quality device instrument companies target on the overall performance and toughness of ball screws. They produce revolutionary types and lubricants to enhance the lifespan of their merchandise.
