China supplier Torno CNC High Precision Metal Automatic Hydraulic Tailstock Slant Bed Lathe CNC Machine with high quality

Product Description

Torno CNC High Precision Metal Automatic Hydraulic tailstock Slant Bed Lathe CNC Machine

      This series of slant bed high speed CNC lathe adopts imported or domestic high-performance CNC system and matched motor and drive to realize two-axis linkage processing. Equipped with ZheJiang axle sleeve spindle, with high precision, high speed, smooth operation and other characteristics, optional hydraulic chuck or collet chuck, can effectively save the work piece clamping time. The machine is suitable for machining shaft parts, thread, arc cone and inner and outer surfaces of the rotating body. Widely used in the automobile industry, electronic industry, motorcycle, home appliances, furniture, lighting and other industries such as rotating body products processing.


1. Slant bed type casting, 2 axis linear way apply to high precision processing.

2. ZheJiang linear way ensured the stability of accuracy.

3. ZheJiang high speed and high accuracy spindle, Japan high precision bearing.

4. Hydraulic chuck, hydraulic station and hydro-cylinder are optional.

5. Chain type auto conveyor is optional.

6. GSK control system or KND control system.


Model HTC-4640
Max. swing diameter over bed mm 460
Max. swing diameter over carriage mm 170
Max. length of workpiece mm 350/300/285 (With Power tool turret)
Spindle head (Chuck optional)   A2-5 (6″)/ A2-6 (8″)
Spindle motor kw 7.5
Spindle rotation speed rpm 5000/ 4000*
Spindle through-hole diameter mm Φ56
Bar diameter mm Φ42
X axis limited travel mm 210
Z axis limited travel mm 400
Tool post   10T/12T servo tool turret
12T power tool turret
8T/10T/12T hydraulic tool turret
Height of tool turret center mm 80
Diameter of tailstock sleeve mm 65
Trevel of tailstock sleeve mm 80
Max. travel of tailstock mm 300
Tailstock sleeve taper   MT4
Bed type and slant angle   Whole body slant type 30°
Dimension mm 2200*1600*1700
Weight kg 2250


Standard accessories:

1. GSK controller system with motor
2. Fully enclosed cover
3. 6″ hydraulic 3 jaw chuck
4. 12T servo tool turret
5. Hydraulic station
6. Foot switch
7. Hydraulic tailstock
8. Auto lubrication system
9. Workpiece coolant system
10. Two axis inner encoder feedback system
11. Working light
12. Alarming light
13. Xihu (West Lake) Dis. way cover
14. Tool and tool box
15. Operation manual

Optional accessories:

1. Fanuc controller system
2. 10T hydraulic  tool turret
3. Chain type conveyor

Industry Focus

                                   Aeronautical parts                                                                             Hardware Parts

                                        Multi-angle part

Core Technology

      Provide customer apllication solution
      Joint company amassed abundant database, can fast provdie applicarion case of production technology beat, machine model selection, machining technology optimization, tool choose, suggest turning and milling, etc. In order to help customer improve produce efficiency, improve machining precision.

      Can provide automatic feeding solution
      Combined customer’s parts machining requirement and technology, design matching material automatic feeding production line, included Truss robot, Feeding tray, etc. Also can continue automatic line remouled of cnc lathe machine.

      Provide customization products for customer
      Aim at small axle type, plate type parts machining for automobile brake dics, etc, devolped variety different machining requirements samll cnc lathe machine. Also can according to customer requirements, customized model for multiaxis turning and milling machining, double spindle machining, etc.

      High precision and good quality product
      Joint company is absorbed in high quality production, amassed abundant experience of cnc product design, manufacture technological, test process, etc. Established quality assurance system, with the most advanced production testing instrument, choose quality accessrories, so our product quality is better than domestic similar products.

Company Profile

       HangZhou Joint Technology Co., Ltd. specializes in R&D and manufacturing mold processing and machinery parts processing equipment, we developed high quality and high-tech research, development, manufacturing, service team and management system, and expanded products to more than 11 series from milling machines, to machine center,mechanical arm, automation. With the exceptional quality products and distinct brand reputation, our products are sold to more than 40 developed cities all over China, and also to more than 20 countries all over the world across Asia, Europe and America.Our company takes the high quality product as orientation, R&D ideas is to provide customers with the most suitable quality products, became a professional machine tool manufacturer with a complete product line of CZPT and parts processing machine tool and strong tailor-made design capability in China.

Core strengths

1. Standardize processes and operating mechanisms, high standards production and testing software and hardware – Ensure stable product supply and service support.
2. We insist in-depth research and technological precipitation for more than 20 years – Promote rapid innovation and progress in products and technology.
3. Comprehensive information management systems such as ERP and CRM – JOINT has formed a efficient operation and continuous improvement system.
4. Integrity, collaboration, innovation, and CZPT spirit –  we JOINT has established a strong and stable supply chain, and a large long-term CZPT customer base.

Special advantages

1. Provide more practical customized products
2. Provide CNC product applications support
3. Provide integrated solution for auto production line
4. Provide integrated design of mold, and parts processing production line

Qualifications and honors

1. National High-tech Enterprose
2. HangZhou famous brand “JOINT”
3. Member of China Quality Association
4. Member of China Machine Tools Association
5. Vice-chairmen of HangZhou Machinery Association
6. CE certification on milling machine, grinidng machine and machine center.
7. More than 150 patents on invention, utility model patent and software copyright etc.
8. ZheJiang famous trademark


Q1: Are you trading company or manufacturer?
A1: We are factory since 1995.

Q2: What is your terms of payments?
A2: 30% as deposit, 70% should be paid before delivery.

Q3: How can I choose the most suitable machines?
A3: Please tell us your requirements of the machines, or you could send us the products drawing, our engineer can help to choose suitable model for you.

Q4: What is the package? Is it suitable for shipment?
A4: Machine will be packed by exporting standard package, water proof and anti-rust. It is very much strong for oversea transportation.

Q5: How long is the warranty for machines?
A5: Warranty time is 12 months. We will supply the repair parts in this warranty time. The charge of repair parts will be free due to its quality problemin this guarantee.

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.


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.

China supplier Torno CNC High Precision Metal Automatic Hydraulic Tailstock Slant Bed Lathe CNC Machine     with high qualityChina supplier Torno CNC High Precision Metal Automatic Hydraulic Tailstock Slant Bed Lathe CNC Machine     with high quality