Product Description

Product Parameters

 

Product Name Solid rod bars, Solid and hollow bars, Drilling rod bars, Drill stem, Hollow thick wall thickness pipe, Drilling pipe joint, Raise boring drill pipe
Standards AISI, ASTM, DIN, JIS, GB, BS   
Grades SAE1571/1045/4130/4140/4145H/4320/4340/5120/5140/ISO41Cr4/42CrMo/42CrMo4/20Cr/40Cr/20CrMo/SCM420/SCM440/SCM435/S235JR/S275JR/SAE1571/C45/S45C/Q345-B/45#/St52
Size Outside diameter: 100-1000mm
Inside diameter: 5-240mm
Technique Hot rolled, hot forged steel round bars
Heat treatment Normalized ; Annealed ; Quenched and Tempered, pre-hardened
Surface condition Oil anti-corrosive protection, black surface, peeling surface
Test Tensile strength, Yield strength, elongation, impact value, hardness, CZPT size, ultrasonic test, magnetic particle testing, etc. 
length 0.5m ~4.5m
OEM service We supply OEM processing on products as per your drawing on the bars
Exported to Kuwait, Venezuela, Chile, Middle East, the republic of Korea, Malaysia, Peru Etc.
Packing Sea worth standard exporting packing
Shipping term In bulk / FCL / LCL, partial shipment allowed
Delivery time Within 7 days for stocks supply.

Xinruyi Steel Group was built in year 2017 with registered capital of 30,000,000RMB, and we have been in the steel products industries for more than 10years. The group is located in HangZhou City, next to capital of ZheJiang Province, and it enjoy good transportation environment of 3 hours to nearest port and 1 hour CZPT the airport. 

As it is well known to all, HangZhou city is the biggest steel pipe base in North China, with this significant advantage on geography aspect, us company have developed into 1 modern international XINRUYI STEEL GROUP. Till now we have 2 production plants for steel pipes and plate series production and processing, and 3 warehouses for steel products. Our yearly production scale can be reach to 500,000tons, and our warehouse stocks is yearly above 20,000tons. So that we can meet all kinds of demands from different countries clients. Our salesmen are trained to get the best and professional skills on doing export trading dealing with various kinds of issues in the trading, which is a base that our buyers can have good buying experience. Till now we can supply the good quality products consisting of and not limit to the following, steel pipes, bars, rock bolts, guardrail CZPT pipe, guardrail board, color coated steel coils, galvanized coils, steel balls, steel chains, steel plates and steel bearing. Besides we can provides processing procedures for the steel products, like anti-rust protecting, cutting and chamfer, coupling, heat treating, bending, galvanizing, polishing, beveling, pickling, plastic spraying, CNC machining, and so on. 

With efforts of Xinruyi People we have the pleasure to serve the clients from more than 20 countries and areas, We earned good reputations from the clients without any claim. We finally become good friends and intimate partners with them. 

Looking forward, we get good confidence that we will expand our business scales to more countries and areas, and serve more people in the world. Because we always believe quality of the commodity is the life of company, stability is the essence of quality. Also the integrity in business will help bring the long term business relationship, so it is the code that 1 company can develop and survive. 
Xinruyi Group is looking forward to the cooperation with you! We believe 1 time cooperation, friends forever!
(Xinruyi Steel Group Swear: we do not cheat any of our client, we only do business with good faith and honesty! Xinruyi will NEVER offering incredible low rate to attract clients and sending less weight goods to make money. )
(Xinruyi Steel Group Swear: Even if we do not get the order, we do not cheat even 1 client!)
(We give Made-in-China complain center as below: complaint/)

Why Is Us

⊙More than 11 years experience in the steel industry ensuring us best ability supplying you best solutions on goods design, processing, transportation, and cost control.

⊙Abundant ready stocks and sizes assuring you the shortest delivery time and lowest purchase cost; comprehensive and various steel products production and sales range give us opportunity to serve more people.

⊙SGS authorized factory ensuring credit and truth on cooperation, No cheating to all and no shortage on weight in Xinruyi Steel, so you feel free and relaxed to place orders.

⊙Quality guaranteed. The MTC sheet issued by us will be presented together with other shipment documents for every lot. We accept any quality claim raised within 1 year. We always believe high-quality nature is stability, so you will receive same goods every time.

⊙7×24 hours on line communication. You can find us always there whenever you looking for. And for your orders, Xinruyi Sales have responsibilities to present their situations to you via pictures and videos for every stages.

⊙ Customized service help you avoid complex follow-up work, our professional processing on goods itself find you a good one-stop buying experience in our plants.

Frequently Asked Questions

1.What is your paying terms?
   Our usual paying terms are 30%TT as deposit and balance paid after seeing copy of bill of loading. For clients cooperated for more than 1 year, we accept 20% prepay. Beside we do business also under D/P and LC terms.

2.How long is your delivery time?
   For the goods we have in stocks, we deliver the goods within 5days. If it is a production order with volume not above 200tons, the delivery time will usually be within 25days after sealing contract. And the delivery time shall be slightly longer for order volume above 200tons.
3.Before cooperation we want a sample for inspecting of quality, is that okay?
  We can provide a free sample for you shall sample value not above 30USD, you only need to pay the express charge. For a sample valued more than 30USD, the express charge and just 1 half of sample value is on the account of you, and we afford the other half.
4.Does your company accept third party inspection?
   The answer is yes. Especially for new client, they have concern on product quality and quantity, so they authorized the third party inspection like SGS and BV several times to inspect the goods in stead of them, and we coordinated with their work well.
5.Do you accept annual supply order?
   Some of our clients purchase annually. They may place order at beginning or certain time of year, however they need us to supply the goods every month or every season. We can do and accept this kind of supplying. We do not ask for the storage charge, however some percentage of deposit will be with us.
6.What documents do you supply for each order?
   The documents will usually consist of Original Packing List, Commercial Invoice, Mill Test Certificate, Certificate of Origin, Insurance Policy, and Bill of Loading. Some other documents will be as per client request.

  
Finally we thank you again that you can visit Xinruyi Steel, please send your inquiry or comments freely.
We wish you always a beautiful day and in good health!

 

Analytical Approaches to Estimating Contact Pressures in Spline Couplings

A spline coupling is a type of mechanical connection between 2 rotating shafts. It consists of 2 parts – a coupler and a coupling. Both parts have teeth which engage and transfer loads. However, spline couplings are typically over-dimensioned, which makes them susceptible to fatigue and static behavior. Wear phenomena can also cause the coupling to fail. For this reason, proper spline coupling design is essential for achieving optimum performance.
splineshaft

Modeling a spline coupling

Spline couplings are becoming increasingly popular in the aerospace industry, but they operate in a slightly misaligned state, causing both vibrations and damage to the contact surfaces. To solve this problem, this article offers analytical approaches for estimating the contact pressures in a spline coupling. Specifically, this article compares analytical approaches with pure numerical approaches to demonstrate the benefits of an analytical approach.
To model a spline coupling, first you create the knowledge base for the spline coupling. The knowledge base includes a large number of possible specification values, which are related to each other. If you modify 1 specification, it may lead to a warning for violating another. To make the design valid, you must create a spline coupling model that meets the specified specification values.
After you have modeled the geometry, you must enter the contact pressures of the 2 spline couplings. Then, you need to determine the position of the pitch circle of the spline. In Figure 2, the centre of the male coupling is superposed to that of the female spline. Then, you need to make sure that the alignment meshing distance of the 2 splines is the same.
Once you have the data you need to create a spline coupling model, you can begin by entering the specifications for the interface design. Once you have this data, you need to choose whether to optimize the internal spline or the external spline. You’ll also need to specify the tooth friction coefficient, which is used to determine the stresses in the spline coupling model 20. You should also enter the pilot clearance, which is the clearance between the tip 186 of a tooth 32 on 1 spline and the feature on the mating spline.
After you have entered the desired specifications for the external spline, you can enter the parameters for the internal spline. For example, you can enter the outer diameter limit 154 of the major snap 54 and the minor snap 56 of the internal spline. The values of these parameters are displayed in color-coded boxes on the Spline Inputs and Configuration GUI screen 80. Once the parameters are entered, you’ll be presented with a geometric representation of the spline coupling model 20.

Creating a spline coupling model 20

The spline coupling model 20 is created by a product model software program 10. The software validates the spline coupling model against a knowledge base of configuration-dependent specification constraints and relationships. This report is then input to the ANSYS stress analyzer program. It lists the spline coupling model 20’s geometric configurations and specification values for each feature. The spline coupling model 20 is automatically recreated every time the configuration or performance specifications of the spline coupling model 20 are modified.
The spline coupling model 20 can be configured using the product model software program 10. A user specifies the axial length of the spline stack, which may be zero, or a fixed length. The user also enters a radial mating face 148, if any, and selects a pilot clearance specification value of 14.5 degrees or 30 degrees.
A user can then use the mouse 110 to modify the spline coupling model 20. The spline coupling knowledge base contains a large number of possible specification values and the spline coupling design rule. If the user tries to change a spline coupling model, the model will show a warning about a violation of another specification. In some cases, the modification may invalidate the design.
In the spline coupling model 20, the user enters additional performance requirement specifications. The user chooses the locations where maximum torque is transferred for the internal and external splines 38 and 40. The maximum torque transfer location is determined by the attachment configuration of the hardware to the shafts. Once this is selected, the user can click “Next” to save the model. A preview of the spline coupling model 20 is displayed.
The model 20 is a representation of a spline coupling. The spline specifications are entered in the order and arrangement as specified on the spline coupling model 20 GUI screen. Once the spline coupling specifications are entered, the product model software program 10 will incorporate them into the spline coupling model 20. This is the last step in spline coupling model creation.
splineshaft

Analysing a spline coupling model 20

An analysis of a spline coupling model consists of inputting its configuration and performance specifications. These specifications may be generated from another computer program. The product model software program 10 then uses its internal knowledge base of configuration dependent specification relationships and constraints to create a valid three-dimensional parametric model 20. This model contains information describing the number and types of spline teeth 32, snaps 34, and shoulder 36.
When you are analysing a spline coupling, the software program 10 will include default values for various specifications. The spline coupling model 20 comprises an internal spline 38 and an external spline 40. Each of the splines includes its own set of parameters, such as its depth, width, length, and radii. The external spline 40 will also contain its own set of parameters, such as its orientation.
Upon selecting these parameters, the software program will perform various analyses on the spline coupling model 20. The software program 10 calculates the nominal and maximal tooth bearing stresses and fatigue life of a spline coupling. It will also determine the difference in torsional windup between an internal and an external spline. The output file from the analysis will be a report file containing model configuration and specification data. The output file may also be used by other computer programs for further analysis.
Once these parameters are set, the user enters the design criteria for the spline coupling model 20. In this step, the user specifies the locations of maximum torque transfer for both the external and internal spline 38. The maximum torque transfer location depends on the configuration of the hardware attached to the shafts. The user may enter up to 4 different performance requirement specifications for each spline.
The results of the analysis show that there are 2 phases of spline coupling. The first phase shows a large increase in stress and vibration. The second phase shows a decline in both stress and vibration levels. The third stage shows a constant meshing force between 300N and 320N. This behavior continues for a longer period of time, until the final stage engages with the surface.
splineshaft

Misalignment of a spline coupling

A study aimed to investigate the position of the resultant contact force in a spline coupling engaging teeth under a steady torque and rotating misalignment. The study used numerical methods based on Finite Element Method (FEM) models. It produced numerical results for nominal conditions and parallel offset misalignment. The study considered 2 levels of misalignment – 0.02 mm and 0.08 mm – with different loading levels.
The results showed that the misalignment between the splines and rotors causes a change in the meshing force of the spline-rotor coupling system. Its dynamics is governed by the meshing force of splines. The meshing force of a misaligned spline coupling is related to the rotor-spline coupling system parameters, the transmitting torque, and the dynamic vibration displacement.
Despite the lack of precise measurements, the misalignment of splines is a common problem. This problem is compounded by the fact that splines usually feature backlash. This backlash is the result of the misaligned spline. The authors analyzed several splines, varying pitch diameters, and length/diameter ratios.
A spline coupling is a two-dimensional mechanical system, which has positive backlash. The spline coupling is comprised of a hub and shaft, and has tip-to-root clearances that are larger than the backlash. A form-clearance is sufficient to prevent tip-to-root fillet contact. The torque on the splines is transmitted via friction.
When a spline coupling is misaligned, a torque-biased thrust force is generated. In such a situation, the force can exceed the torque, causing the component to lose its alignment. The two-way transmission of torque and thrust is modeled analytically in the present study. The analytical approach provides solutions that can be integrated into the design process. So, the next time you are faced with a misaligned spline coupling problem, make sure to use an analytical approach!
In this study, the spline coupling is analyzed under nominal conditions without a parallel offset misalignment. The stiffness values obtained are the percentage difference between the nominal pitch diameter and load application diameter. Moreover, the maximum percentage difference in the measured pitch diameter is 1.60% under a torque of 5000 N*m. The other parameter, the pitch angle, is taken into consideration in the calculation.

China wholesaler Export to Korea Custom Made CNC Milling Machines Outer Threaded Steel Spline Hollow Shaft     with high qualityChina wholesaler Export to Korea Custom Made CNC Milling Machines Outer Threaded Steel Spline Hollow Shaft     with high quality