Product Description

Product Description

Square and Round Pipe CNC Cutting Machine
1. Can cut rectangular pipes, round pipes, channels, sections and angles.
2. The system comes with a variety of galleries, directly from the gallery to choose the way you need to build, enter the parameters, simple operation.

Features 
1. Effective processing length: 6m
2. Effective cutting profile: maximum opposite side 15mm-100mm; 20mm-200mm
3. Radial positioning accuracy: ±0.1mm/m
4. Axial positioning accuracy: ±0.1mm/m.
5. Repeat positioning accuracy: ±0.1mm.
6. Maximum line speed: 6000mm/min.
7. Plasma cutting pipe wall thickness: according to the configured plasma current size to determine.

 Product Parameters

1. Cutting steel type: Round & square
2. Figures can be cut: Variety of graphics by outspreading intersecting line, can be with bevel
3. Control Axes: 3-4-5-6 axies, bevel cutting with 6 spindle and six-interlocking.
4. Diameter: 30-1000mm or customize (bigger dia. )
5. Thickness of the pipe: Flame: 5-200mm, plasma: 1-60mm
6. Bevel cutting range: Flame 60degree, plasma 30, 45degree.
7. Cutting mode: Plasma/Flame/laser
8. Pipe max length: ≥ 6m
9. Pipe clamping method: Chuck
10. Power-driven: High-precision AC servo+dedicated planetary reducer
11. Control System: A dedicated intersecting line cutting system: 6-axis controlled, with quantitative intersecting line cutting macro library
12.Others

14.Performance and precision mechanical movement indicators
(1), the workpiece rotary drive
Drive System Precision gear box,: Gear transmission
Speed: 0.1-25 rpm / min
Japanese CZPT servo: A5 Series AC servo system
Reset Accuracy: ± 0.5mm
Adjustment range: 6-1000
(2), CZPT the car moved axially along the workpiece
Precision Drive System: ZheJiang Planetary gear box, gear, rack gear
Effective stroke: 12000mm CZPT car
Japanese CZPT servo: A5 Series AC servo system
Reset Accuracy: ± 0.5mm
(3), CZPT fan axial plane workpiece swing axle
Precision Drive System: ZheJiang Planetary gear box, gear, rack gear
Swing angle: 30 ° -150 °
Japanese CZPT servo: A5 Series AC servo system
Positioning accuracy of ± 0.3 °
(4), CZPT the car moves up and down shaft
Drive system: Linear guide, ball screw drive to pay
Torch the car up and down stroke determine: The form of the cutter ( cutting diameter compliance requirements )
Japanese CZPT servo: A5 Series AC servo system
Reset Accuracy: ± 0.2mm
(5), the workpiece CZPT fan oscillating axle radial plane
Drive system: Curved rack ( arms drive )
Swing angle: 30 ° -150 °
Japanese CZPT servo: A5 Series AC servo system
Positioning accuracy: ± 0.3 °
(6), the auxiliary measurement axis: Profiling measurements and the pipe surface to prevent collisions with the torch
(7), the CZPT moves back and forth along the tube axis radial
Drive system: Linear guide, rack size
Move forward and backward stroke: 500mm
Japanese CZPT servo: A5 Series AC servo system
Mobile accuracy: ± 0.2mm

Application

1. Intersection cylindrical hole cutting of different directions and diameters on main pipe for vertical intersection between branch pipe and main pipe.
2. Intersection cylindrical end cutting on brand pipe for vertical intersection between branch pipe and main pipe.
3. Bevel cutting on Pipe end
4. Welding Elbow cutting on pipe
5. Branch pipe Intersection end cutting connected with ring main pipe
6. Square hole and branch hole cutting on pipe
7. Cutting off of pipes

Cutting samples

Packing & Shipping

Machines will be packed in seaworthy wooden cases strengthed by metal straps.We can ship to your carrier in China or deliver to your oversea destination.

Why choose us

      HangZhou Lansun was established by leading experts and Engineering faculty from the China University of Geosciences,and has been specializing in design and manufactur of CNC cutting & welding machines for over 30 years.Our headquarter is located in the HangZhou East Lake High-Tech Development Zone.Lansun covers an area of 42 acres, and has 27000 square meters of facilities.We can manufacture 20pcs of machines per day. Our sales and service networks are throughout China and oversea.By comparing with most of our competitors,we have below prominences:    
     1.We are a factory,not a trading company.We not only design but also produce every parts and assembly them into machines in our factory.So,we always provide customers with products of the lastest technology and reliable quality.Also as a factory ,we have our own pre-sales and after sales service team,so we can serve to customer more instantly and,during the whole life of machine ,you can feel free to turn to us if you encounter any question.
     2.We can provide favourable prices.Our boss is professor of Machine and Electric colloge of China University of Geology,he supports our R&D team with his abounding experiences.Furthermore,our factory is self-own,not rent from other owner.So,we are more CZPT to control  the cost of both developping and producing.
     3.A reliable supplier of CNC machine.Our company engages in CNC cutting and welding machine for nearly 30years,we served more than 10,000 customers worldwide.

Besides ISO,CE certification,our company also obtains a lot of inventation patents and software copyrights on CNC mechanism and controlling system.

As we are a factory,and our boss is professor from China University of Geology,we can control the R&D cost,manufacturing cost at a very low level and always can provide our customers with competitive prices.Factory can provide with instant and longterm after sale services.

FQA

1. Are you a factory or trading company?
We are a factory,we engage in CNC cutting/welding machine designing and manufacturing for nearly 30 years.
2. Where is your factory located? How can I visit there? 
Our factory is located in HangZhou, ZheJiang ,the centre of China,the traffic is very convenient,we can pick you up at airport or train station. 
3. What’s the quality of your machines?
Our factory has been certified by ISO,CE.Products are designed by ourselves,moreover most of the components are manufuctured by ourselves as well,so we can make our machines of hight quality while at relatively lower prices.
4. What shall we do if don’t know how to operate your machine?
We have detail installing and operating instructions attached, also comes with video.Our after sale service hot line will be available for 24H everyday.
5. What other things are also needed after we buying your machines?
(1) You need to prepare for oxygen and fuel gas if you want to cut by flame
(2) You need to prepare plasma power and air compressor if you want to cut by plasma.We also can procure these periphery devices for you,but you need to additionally pay for them.
6. What are your payment terms?
We support T/T, L/C, Western Union and so on. Other ways may also be acceptable after we both sides appropriately discussed and agreed.
7. What if we have any problem with the machine? 
We will get back to you with solutions with maxmum of 12 hours after receiving your description of what the problem is.During the warranty period(generally 12 months), in case faulty material found at our discretion we will be responsible to repair or change.This clause does not provide coverage for lost or destroyed materials.8.What are the advantages of this model machine?(1). Can cut both square pipe and round pipe.
(2). Pipe diameter range: square pipe 100-400mm, round pipe 100-600mm(or customize);Length 6m, 9m, 12m(or customize).
(3). Main cutting functions:Bevel cutting , sharp cutting, round hole, square hole, square tube with R angle, waist hole.
(4).Can equip with 1 or more cutting torch,such as laser,falme or plasma,can cut different thickness and different kinds of metals,eg.,can cut carbon steel up to 200mm,for details please refer to the “Cutting mode and cutting thickness” TABLE below.
(5).Automatic ignition when cutting by flame.

How to Calculate Stiffness, Centering Force, Wear and Fatigue Failure of Spline Couplings

There are various types of spline couplings. These couplings have several important properties. These properties are: Stiffness, Involute splines, Misalignment, Wear and fatigue failure. To understand how these characteristics relate to spline couplings, read this article. It will give you the necessary knowledge to determine which type of coupling best suits your needs. Keeping in mind that spline couplings are usually spherical in shape, they are made of steel.

Involute splines

An effective side interference condition minimizes gear misalignment. When 2 splines are coupled with no spline misalignment, the maximum tensile root stress shifts to the left by 5 mm. A linear lead variation, which results from multiple connections along the length of the spline contact, increases the effective clearance or interference by a given percentage. This type of misalignment is undesirable for coupling high-speed equipment.
Involute splines are often used in gearboxes. These splines transmit high torque, and are better able to distribute load among multiple teeth throughout the coupling circumference. The involute profile and lead errors are related to the spacing between spline teeth and keyways. For coupling applications, industry practices use splines with 25 to 50-percent of spline teeth engaged. This load distribution is more uniform than that of conventional single-key couplings.
To determine the optimal tooth engagement for an involved spline coupling, Xiangzhen Xue and colleagues used a computer model to simulate the stress applied to the splines. The results from this study showed that a “permissible” Ruiz parameter should be used in coupling. By predicting the amount of wear and tear on a crowned spline, the researchers could accurately predict how much damage the components will sustain during the coupling process.
There are several ways to determine the optimal pressure angle for an involute spline. Involute splines are commonly measured using a pressure angle of 30 degrees. Similar to gears, involute splines are typically tested through a measurement over pins. This involves inserting specific-sized wires between gear teeth and measuring the distance between them. This method can tell whether the gear has a proper tooth profile.
The spline system shown in Figure 1 illustrates a vibration model. This simulation allows the user to understand how involute splines are used in coupling. The vibration model shows 4 concentrated mass blocks that represent the prime mover, the internal spline, and the load. It is important to note that the meshing deformation function represents the forces acting on these 3 components.

Stiffness of coupling

The calculation of stiffness of a spline coupling involves the measurement of its tooth engagement. In the following, we analyze the stiffness of a spline coupling with various types of teeth using 2 different methods. Direct inversion and blockwise inversion both reduce CPU time for stiffness calculation. However, they require evaluation submatrices. Here, we discuss the differences between these 2 methods.
The analytical model for spline couplings is derived in the second section. In the third section, the calculation process is explained in detail. We then validate this model against the FE method. Finally, we discuss the influence of stiffness nonlinearity on the rotor dynamics. Finally, we discuss the advantages and disadvantages of each method. We present a simple yet effective method for estimating the lateral stiffness of spline couplings.
The numerical calculation of the spline coupling is based on the semi-analytical spline load distribution model. This method involves refined contact grids and updating the compliance matrix at each iteration. Hence, it consumes significant computational time. Further, it is difficult to apply this method to the dynamic analysis of a rotor. This method has its own limitations and should be used only when the spline coupling is fully investigated.
The meshing force is the force generated by a misaligned spline coupling. It is related to the spline thickness and the transmitting torque of the rotor. The meshing force is also related to the dynamic vibration displacement. The result obtained from the meshing force analysis is given in Figures 7, 8, and 9.
The analysis presented in this paper aims to investigate the stiffness of spline couplings with a misaligned spline. Although the results of previous studies were accurate, some issues remained. For example, the misalignment of the spline may cause contact damages. The aim of this article is to investigate the problems associated with misaligned spline couplings and propose an analytical approach for estimating the contact pressure in a spline connection. We also compare our results to those obtained by pure numerical approaches.

Misalignment

To determine the centering force, the effective pressure angle must be known. Using the effective pressure angle, the centering force is calculated based on the maximum axial and radial loads and updated Dudley misalignment factors. The centering force is the maximum axial force that can be transmitted by friction. Several published misalignment factors are also included in the calculation. A new method is presented in this paper that considers the cam effect in the normal force.
In this new method, the stiffness along the spline joint can be integrated to obtain a global stiffness that is applicable to torsional vibration analysis. The stiffness of bearings can also be calculated at given levels of misalignment, allowing for accurate estimation of bearing dimensions. It is advisable to check the stiffness of bearings at all times to ensure that they are properly sized and aligned.
A misalignment in a spline coupling can result in wear or even failure. This is caused by an incorrectly aligned pitch profile. This problem is often overlooked, as the teeth are in contact throughout the involute profile. This causes the load to not be evenly distributed along the contact line. Consequently, it is important to consider the effect of misalignment on the contact force on the teeth of the spline coupling.
The centre of the male spline in Figure 2 is superposed on the female spline. The alignment meshing distances are also identical. Hence, the meshing force curves will change according to the dynamic vibration displacement. It is necessary to know the parameters of a spline coupling before implementing it. In this paper, the model for misalignment is presented for spline couplings and the related parameters.
Using a self-made spline coupling test rig, the effects of misalignment on a spline coupling are studied. In contrast to the typical spline coupling, misalignment in a spline coupling causes fretting wear at a specific position on the tooth surface. This is a leading cause of failure in these types of couplings.

Wear and fatigue failure

The failure of a spline coupling due to wear and fatigue is determined by the first occurrence of tooth wear and shaft misalignment. Standard design methods do not account for wear damage and assess the fatigue life with big approximations. Experimental investigations have been conducted to assess wear and fatigue damage in spline couplings. The tests were conducted on a dedicated test rig and special device connected to a standard fatigue machine. The working parameters such as torque, misalignment angle, and axial distance have been varied in order to measure fatigue damage. Over dimensioning has also been assessed.
During fatigue and wear, mechanical sliding takes place between the external and internal splines and results in catastrophic failure. The lack of literature on the wear and fatigue of spline couplings in aero-engines may be due to the lack of data on the coupling’s application. Wear and fatigue failure in splines depends on a number of factors, including the material pair, geometry, and lubrication conditions.
The analysis of spline couplings shows that over-dimensioning is common and leads to different damages in the system. Some of the major damages are wear, fretting, corrosion, and teeth fatigue. Noise problems have also been observed in industrial settings. However, it is difficult to evaluate the contact behavior of spline couplings, and numerical simulations are often hampered by the use of specific codes and the boundary element method.
The failure of a spline gear coupling was caused by fatigue, and the fracture initiated at the bottom corner radius of the keyway. The keyway and splines had been overloaded beyond their yield strength, and significant yielding was observed in the spline gear teeth. A fracture ring of non-standard alloy steel exhibited a sharp corner radius, which was a significant stress raiser.
Several components were studied to determine their life span. These components include the spline shaft, the sealing bolt, and the graphite ring. Each of these components has its own set of design parameters. However, there are similarities in the distributions of these components. Wear and fatigue failure of spline couplings can be attributed to a combination of the 3 factors. A failure mode is often defined as a non-linear distribution of stresses and strains.