Product Description

Product Description

Mandrel

1.According to different needs of customers: 

 Traditional spline milling mandrel
Cold rolling mandrel 

2. Processing range:
 
Length: within 15m
   
3. Spline type:
 
Single key slot
Hexagonal key
High torque rectangular key
Double keyway
Involute internal spline
Round keyway
Rectangular spline
Keyway designed according to customer requirements

4. Materials
Provide different materials to meet different needs of customers:
-Imported materials (imported from Japan & Germany)
-Domestic materials
-WR series materials
(WR6/WR8/WR9/WR10/WR12/WR15A/WR15E/WR30)

Advantages of cold rolling mandrel compared with traditional spline milling: 

It is a qualitative leap in spline machining process that the advanced cold extrusion process is used to replace the traditional mechanical cutting method. It not only improves the machining accuracy and surface finish, but also greatly improves the mechanical properties of parts.
The cold work hardening of metal after cold extrusion and the formation of reasonable fiber streamline distribution in the parts make the strength of spline much higher than that of mechanical cutting.
Through the test, the bearing torque of the mandrel processed by this process is increased by 25-30%, and the accuracy is improved by 2 levels, CZPT the international level 6 accuracy. In addition, the reasonable cold extrusion process can form compressive stress on the surface of the parts and improve the fatigue strength.

High toughness and strength
Strong comprehensive performance, CZPT to bear high torque, necessary for extruder
Fine processing, involute spline coaxiality ≤ 0.05mm

Cold rolling mandrel
Product introduction: 

     Designed for high-end users of twin-screw extruder: high torque, high strength and high precision extruder mandrel 

With the development of twin-screw extruder towards high speed and high torque, higher requirements are put forward for the strength (especially thermal strength) and accuracy of the mandrel of twin-screw extruder. Through extensive investigation and painstaking research, our company adopts pre hard alloy tool steel imported from Germany and cold rolling processing equipment imported from Europe for spline processing. After customer trial, our products fully meet the performance and quality requirements of similar high-end products imported from abroad.
Cold rolling mandrel production equipment

Comparison diagram of wear resistance and bearing maximum torque of different mandrel materials
 

2: Advantages of cold rolling mandrel compared with traditional cutting mandrel 

      Cold extrusion spline processing: 

Using advanced cold extrusion technology to replace the traditional mechanical cutting method to process splines is a qualitative leap in spline processing technology. It not only improves the machining accuracy and surface finish, but also greatly improves the mechanical properties of parts.

The cold work hardening of the metal after cold extrusion and the formation of reasonable fiber streamline distribution in the parts make the strength of the spline much higher than that processed by mechanical cutting.

Through the test, the bearing torque of the mandrel processed by this process is increased by 25 ~ 30%, and the accuracy is improved by 2 levels, CZPT the accuracy of grade 6 of the national standard. In addition, a reasonable cold extrusion process can form compressive stress on the surface of the parts and improve the fatigue strength.
 

Company Profile

 

ZheJiang Chooshin Industrial Co., LTD

Chooshin industrial co., ltd. is an international and specialized high-tech company engaged in the manufacture of polymer material processing equipment. Zeuxing is committed to the independent design and development of new technology and equipment related to polymer material processing equipment, equipment processing and manufacturing, and project complete set service business, and long-term focus on promoting the continuous development of high-end technology products and project complete set technology.

The company has rich talent reserve and technical experience in the field of polymer equipment manufacturing, and its technical development team has 20 years of experience in the development of complete sets of polymer blending and modification equipment. At the same time, it maintains in-depth cooperation with domestic universities and research institutes and advanced extruder companies abroad.

Company location

 

Assembly shop

 

Our Advantages

 

* With an experienced design and development team, the company has formed a very concentrated talent resource advantage in this field in China.
 

* Nearly 20 years of co-direction twin screw research and development and rich practice closely combined with many polymer material technology, integrating mechanical manufacturing, electrometer design and development and polymer material technology as a whole;
 

* With CNC machining center as the core, the industry leading modern production and manufacturing platform has been realized. Formed a set of design, manufacturing and application of 3 key technologies in 1 of the comprehensive advantages;
 

* Based on the research and practice of the internal relationship and process law between the modern emerging polymer material technology and polymer equipment, relying on the increasingly perfect and domestic leading test research and development center, it can realize the integration and seamless connection of theory, test and engineering application technology.
 

* Relying on the above advantages of resource integration, the company has and will continue to strengthen the ability of independent innovation and extended technology development.

 

 

FAQ

 

Q: Are you trading company or manufacturer?
A: We are factory.We have the technical production team,and the workers are all very experienced.

Q: Why choose you?
A:You can get a very fair price from us and our price can make you beat your competitors in the marke

Q: What kind of certification do you have?
A: Our products have obtained ISO9001 and CE certification,the quality can be guaranteed.

 

Screw Shaft Types

A screw shaft is a cylindrical part that turns. Depending on its size, it is able to drive many different types of devices. The following information outlines the different types of screws, including their sizes, material, function, and applications. To help you select the right screw shaft, consider the following factors:

Size

A screw can come in a variety of shapes and sizes, ranging from a quarter to a quarter-inch in diameter. A screw is a cylindrical shaft with an inclined plane wrapped around it, and its main function is to fasten objects together by translating torque into a linear force. This article will discuss the dimensions of screws and how to determine the size of a screw. It is important to note that screw sizes can be large and small depending on the purpose.
The diameter of a screw is the diameter of its shaft, and it must match the inner diameter of its nuts and washers. Screws of a certain diameter are also called machine screws, and they can be larger or smaller. Screw diameters are measured on the shaft underneath the screw head. The American Society of Mechanical Engineers (ASME) standardized screw diameters in 3/50-inch to 16 (3/8-inch) inches, and more recently, sizes were added in U.S. fractions of an inch. While shaft and head diameters are standardized, screw length may vary from job to job.
In the case of the 2.3-mm screw group, the construct strength was not improved by the 1.2-mm group. The smaller screw size did not increase the strength of the construct. Further, ABS material did not improve the construct strength. Thus, the size of screw shaft is an important consideration in model design. And remember that the more complex your model is, the larger it will be. A screw of a given size will have a similar failure rate as a screw of a different diameter.
Although different screw sizes are widely used, the differences in screw size were not statistically significant. Although there are some limitations, screws of different sizes are generally sufficient for fixation of a metacarpal shaft fracture. However, further clinical studies are needed to compare screw sizes for fracture union rates. So, if you are unsure of what size of screw shaft you need for your case, make sure to check the metric chart and ensure you use the right one.

Material

The material of a screw shaft plays an important role in the overall performance of a screw. Axial and central forces act to apply torque to the screw, while external forces, such as friction, exert a bending moment. The torsional moments are reflected in the torque, and this causes the screw to rotate at a higher rate than necessary. To ensure the longevity of the screw, the material of the screw shaft should be able to handle the bending moment, while the diameter of the shaft should be small enough to avoid causing damage.
Screws are made from different metals, such as steel, brass, titanium, and bronze. Manufacturers often apply a top coating of chromium, brass, or zinc to improve corrosion resistance. Screws made of aluminum are not durable and are prone to rusting due to exposure to weather conditions. The majority of screw shafts are self-locking. They are suited for many applications, including threaded fasteners, C-clamps, and vises.
Screws that are fabricated with conical sections typically feature reduced open cross-sectional areas at the discharge point. This is a key design parameter of conical screw shafts. In fact, reductions of up to 72% are common across a variety of applications. If the screw is designed to have a hard-iron hanger bearing, it must be hardened. If the screw shaft is not hardened, it will require an additional lubricant.
Another consideration is the threads. Screw shafts are typically made of high-precision threads and ridges. These are manufactured on lathes and CNC machines. Different shapes require different materials. Materials for the screw shaft vary. There are many different sizes and shapes available, and each 1 has its own application. In addition to helical and conical screw shafts, different materials are also available. When choosing material, the best 1 depends on the application.
The life of the screw depends on its size, load, and design. In general, the material of the screw shaft, nut body, and balls and rollers determine its fatigue life. This affects the overall life of the screw. To determine whether a specific screw has a longer or shorter life, the manufacturer must consider these factors, as well as the application requirements. The material should be clean and free of imperfections. It should be smooth and free of cracks or flaking, which may result in premature failure.

Function

The function of a screw shaft is to facilitate the rotation of a screw. Screws have several thread forms, including single-start, double-start and multi-start. Each form has its own advantages and disadvantages. In this article we’ll explore each of them in detail. The function of a screw shaft can vary based on its design, but the following are common types. Here are some examples of screw shaft types and their purposes.
The screw’s torque enables it to lift objects. It can be used in conjunction with a bolt and nut to lift a load. Screws are also used to secure objects together. You can use them in screw presses, vises, and screw jacks. But their primary function is to hold objects together. Listed below are some of their main functions. When used to lift heavy loads, they can provide the required force to secure an object.
Screws can be classified into 2 types: square and round. Square threads are more efficient than round ones because they apply 0deg of angle to the nut. Square threads are also stronger than round threads and are often used in high-load applications. They’re generally cheaper to manufacture and are more difficult to break. And unlike square threads, which have a 0deg thread angle, these threads can’t be broken easily with a screwdriver.
A screw’s head is made of a series of spiral-like structures that extend from a cylindrical part to a tip. This portion of the screw is called the shank and is made of the smallest area. The shank is the portion that applies more force to the object. As the shaft extends from the head, it becomes thinner and narrow, forming a pointed tip. The head is the most important part of the screw, so it needs to be strong to perform its function.
The diameter of the screw shaft is measured in millimeters. The M8 screw has a thread pitch of 1.25 mm. Generally, the size of the screw shaft is indicated by the major and minor diameter. These dimensions are appended with a multiplication sign (M8x1).

Applications

The design of screws, including their size and shape, determines their critical rotating speeds. These speeds depend on the threaded part of the screw, the helix angle, and the geometry of the contact surfaces. When applied to a screw, these limits are referred to as “permissible speed limits.” These maximum speeds are meant for short periods of time and optimized running conditions. Continuous operation at these speeds can reduce the calculated life of a nut mechanism.
The main materials used to manufacture screws and screw shafts include steel, stainless steel, titanium, bronze, and brass. Screws may be coated for corrosion resistance, or they may be made of aluminium. Some materials can be threaded, including Teflon and nylon. Screw threads can even be molded into glass or porcelain. For the most part, steel and stainless steel are the most common materials for screw shafts. Depending on the purpose, a screw will be made of a material that is suitable for the application.
In addition to being used in fasteners, screw shafts are used in micrometers, drillers, conveyor belts, and helicopter blades. There are numerous applications of screw shafts, from weighing scales to measuring lengths. If you’re in the market for a screw, make sure to check out these applications. You’ll be happy you did! They can help you get the job done faster. So, don’t delay your next project.
If you’re interested in learning about screw sizing, then it’s important to know the axial and moment loads that your screws will experience. By following the laws of mechanics and knowing the load you can calculate the nominal life of your screw. You can also consider the effect of misalignment, uneven loading, and shocks on your screw. These will all affect the life of your screw. Then, you can select the right screw.