Solution Description

ZHangZhoug ZheJiang n copper pipeline Co., Ltd. was proven in 1990,located in the Ruanshi Industrial Park in HangZhou, ZHangZhoug province. The 2 segment of the firm addresses an location of 20000 kilo meters and more than two hundred employees. Following 28 a long time of unremitting endeavours with increased specifications, the organization has transformed from the first household workshop to a present day scale enterprise. The merchandise line extends from the solitary copper refrigeration parts to a variety of countless numbers of merchandise, masking refrigeration,heating,machine fittings, h2o pipe fittings and valves and many others. And strive to open up new areas and new channels to attain the vision of pipe fittings foremost enterprises
The business has fashioned 5 collection of products: Copper capillary collection, Copper pressfit collection, AC copper pipe fittings, Valve, playing cards and thread brass fittings. All the sequence of merchandise not only to satisfy the customer’s demands for the nationwide regular CJ/T-2000, the British standard BS864-2, the American Regular ASME B16.22-1995, the European common EN1254-2 , but also to take all sorts of non – standard fittings primarily based on the unique requirements.
The items of ZheJiang n pipeline are licensed by ISO9001 international good quality method certification and AS 3688 Australia regular. The manufacturing process of raw resources inspection, uncooked substance processing, annealing approach, item quality inspection and finished packaging are strictly carried out in accordance to Australian expectations. Under continuous demands and enhancements, ZheJiang n has achieved the forefront of the business in the pursuing factors.
Rw substance handle. Very first, each batch of uncooked resources should be equipped with certificate of qualification and material aspect certificate. In accordance with the supplier’s substance sheet, the material is instantly notified to the liable staff of the substance inspection, and the sample is inspecting. the unqualified uncooked resources will not be approved. Next, the uncooked material, thanks to the modify of the internal crystal right after the forging approach, we will check the rough right after the forging in the lab. Third, simply because of the special use needs of some items, such as the sealing product and the pressfit item, 3rd instances of tension need to have to be carried out, so the material composition is analyzed for 3rd occasions. To ensure that the uncooked resources of the final solution are competent.
Annealing process is a essential step in the processing of items. Better annealing process can drastically increase the longevity and safety of products. Our annealing process is carried out in rigorous accordance with Australian specifications, and the items are annealed at phases. For illustration, the crystal will adjust and reorganize when the brass materials is heated to a specific temperature, so the temperature management is crucial, and the dezine resistance of the materials can not be damaged. The DZR brass (Dezincification resistance of brass) exported to Australia is strictly implemented in accordance with the Australian expectations. Our annealing approach can tremendously boost the corrosion resistance and dezine resistance of the merchandise. The merchandise fulfills the specifications of environmental protection, and can be commonly utilized in various sanitary merchandise and immediate drinking water projects, so as to ensure the pure and CZPT of consuming drinking water.
The quality manage in the production procedure. 1st: the rough is checked by the inspector. The workers will measure the precision in accordance to the drawing, and all the testing instruments are imported from Australia. 2nd: inspectors carry out uninterrupted inspection of every item being created. The packaging workshop tests the physical appearance and measurement of each and every merchandise 3rd, the last item is checked, each and every solution measurement must conform to the AS3688 drawing standard, and the good quality inspection personnel report the item information of the take a look at. In addition, for goods that need to be examined for stress, the inspectors will be CZPT to examination the airtightness or drinking water tightness of each and every solution professionally to ensure that every single item reaches the stress common.
Ultimately, in the packaging, specially in the export, we use a far more sound packaging, we use modest packing containers to pack the goods, and then set modest packing containers in large bins, double packing to ensure the basic safety of the product, minimize the transportation approach damage to the item.
First – course technology, advanced engineering, perfect creation approach, precision tests gear, every single worker is in harmony with every other to spotlight the spirit of ZheJiang n. “Top quality very first, pragmatic and enterprising, user foremost, sincerity to coronary heart” is our company’s goal. Secure good quality and affordable value are deeply reliable by domestic and abroad buyers in the lengthy expression growth.We will continue to innovate, increase and take care of our clients with higher treatment.
The frame of mind establishes the top, the particulars determine the achievement or failure, the over is the summary of the large standard of our creation process, not only in the method, in the organization personnel management, tools administration, warehousing logistics, monetary accounting, business office environment and other factors of the higher specifications of their own. With the constant self need and promotion, our item top quality will also give buyers the excellent use of encounter, to aid consumers acquire honor and popularity in the industry, to comprehend the eyesight of the major company in the area of pipeline fittings.

Screw Shaft Types

If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.

Machined screw shafts

Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find one to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.

Ball screw nuts

If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the two ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These two features ensure that the ball and the nut meet at two points. You’ll be amazed by the results of the work of these ball screw nuts.

Threaded shank

Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress two pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as one with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is eight mm in diameter but has a thread pitch of one mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.

Round head

A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to one mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.

Self-locking mechanism

A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.