CNC Intelligent Lathe/Intelligent CNC Machine Tool/Machine Tool

• After-sales Service: 24 Hours
• Warranty: 12 Monthes
• Type: Horizontal Lathe
• Processing Accessory: Centre CNC Lathe
• Guide Rail: Horizontal Guide Rail
• Tool Holder: Double-tool Holder CNC Lathe
• Model NO.: LT260-600
• Power Source: Electric
• Controlling Mode: CNC
• Automatic Grade: Automatic
• Setting Mode: Floor-type
• Precision: High Precision
• Certification: ISO 9001
• Condition: New
• Transport Package: Hainan Airlines Set
• Specification: metal
• Trademark: BAIHANG
• Origin: Shenyang, China
• Production Capacity: 500pieces/Year

Product Description

                                  LT Series CNC Horizontal Lathe

                                  LT260-600 Product Introduction



                    Shenyang Baihang Intelligent Manufacturing Research Institute Co.,Ltd

 

1.General Introduction

LT260 series is a horizontal CNC lathe with high quality, high precision, high rigidity and high efficiency.Hundreds of quality control items in the production process were screened one by one to ensure the reliability of assembly quality and the stability of the whole machine quality;Multiple groups of testing stations and test benches strictly test the key components to ensure the consistency of accuracy.The combination of the traditional and the latest assembly process methods ensures the realization of the design stiffness. This series of machine tools have high precision and high rigidity can be realized by turning instead of grinding, the main performance have indicators reach the international leading level.


The machine can process shaft and disk parts, turn thread, arc, cone and inner and outer surface of the rotating body, and process the rotating body parts efficiently, in large quantities and with high precision. By configuring the C-axis and the power cutter tower, the composite machining can be realized. Besides the basic functions of turning, it can also realize the functions of milling, drilling, boring, rigid wire and so on. In the design, the stiffness of the main shaft, bed, cutter tower, tail seat and other components are matched reasonably, which greatly improves the rigidity of the whole machine and ensures the stability of recutting. As a high-quality, high-stability machine tool, it is especially suitable for aviation, aerospace, automotive, motor, bearing, hydraulic and other industries to carry out efficient, high-volume, high-precision processing of rotating body parts. 

2.Structural Features

2.1 Lathe Bed
This series of machine tools adopts the overall inclined bed flat guide rail structure of 30° bevel Angle to ensure the overall rigidity of the machine tool and the force is more stable during cutting. In addition to the traditional high-density cast iron material, the bed material can also use the world's advanced resin concrete material, resin concrete has excellent vibration absorption, low thermal conductivity characteristics, effectively improve the dynamic stability of the machine tool and thermal stability.
The machine adopts a unique oil-water separation design to avoid the pollution of cutting fluid and extend the service time of cutting fluid. The large chip removal port design ensures smooth cutting of the machine tool. Z-axis guide adopts 35 specifications precision linear ball guide, high feed accuracy, low friction resistance, good rigidity, high resistance to vibration and deformation, enabling users to obtain higher processing accuracy and production efficiency.
                      Figure: Lathe bed figure

2.2 Apron and Slide
The bed apron and slide board are made of high-density cast iron, the turret and slide are placed on the apron of the bed, the slide and turret move on the apron with high rigidity sliding guide rail. The guide rail and the slide board are integrated and hardened by precision grinding, which greatly improves the axial stiffness of the machine tool. To improve the accuracy of the guide rail and prolong the service life of the machine tool, a PTFE anti-wear soft belt with low friction coefficient is bonded on the friction surface of the saddle and slide guide rail.

                               Figure: Apron and slide

2.3 Two Axis Feed
The X and Z axis feed are directly connected with the ball screw by the servo motor through the coupling, and the ball screw is supported by one end of the fixed end, which can make one end of the screw extend freely, thus avoiding the extension of the screw due to the rise in temperature during the working process, resulting in longitudinal bending. To compensate for the lead screw elongation caused by the rise in working temperature, ensure the positioning accuracy of the lead screw when used and the system rigidity of the ball lead screw, the lead screw is pre-stretched and pre-tightened according to a certain amount of thermal elongation before assembly to eliminate the influence of temperature rise on the accuracy.

                               

2.4 Servo Turret
Servo tower adopts large span tower box and rigid locking gear plate structure, which has excellent load capacity. The servo motor is used to drive the rotation and the hydraulic lock, which can realize the bidirectional nearby tool selection and meet the requirements of high performance and fast tool change. Through the servo motor technology to control the acceleration and deceleration process, the tool tower can still complete the flexible indexing position without impact under high inertial load. High-precision triple gear disc structure and hydraulic drive make the cutter can be loosened and locked without lifting, effectively protecting the internal mechanical structure from external pollution (coolant, iron filings, dust, etc.).   The triple gear disc is made of high hardness alloy steel precision grinding, large size, high locking force, to ensure the high stiffness and accuracy of the cutter tower.   The tool tower has the advantages of precise manufacture, reasonable design, low working temperature and long-lasting lubrication, which ensures the accuracy and reliability of the tool tower in use.
               Figure: Servo turret

2.5 Turning Spindle
Turning spindle adopts box-type spindle, large span left and right symmetrical structure, uniform heat dissipation, small thermal offset, stable precision, and strong rigidity. The coupling surface of the spindle and the bed adopts the matching scraping technology to ensure the contact rigidity. The main spindle bearings are imported precision bearings, lubricated with high-speed lithium grease, and assembled under constant temperature environment to ensure the high precision requirements of the main shaft. The main spindle is directly driven by the motor through the pulley, which reduces the power loss of the mechanical transmission, and makes the start and stop fast and stable. The special spindle encoder eliminates the synchronous belt drive mechanism and effectively reduces the failure rate.
                   Figure: Turning spindle

                                       FANUC SYSTEM                                                                                                       GSK SYSTEM



2.6 Hydraulic Tailstock
The tail seat body is dragged by the apron and moves on the sliding guide rail. The tail seat body is dragged by the bed saddle and moves on the sliding guide rail. Drag the eccentric shaft into place and lock it manually. The center is installed in the center sleeve of the tail seat body, and the center realizes top tightening and loosening through the movement of the sleeve driven by the hydraulic cylinder. The front and back movement of the center is realized automatically by the M command of the CNC system, or manually by the buttons on the control panel. After the center holds the workpiece, the radial locking cylinder holds the center dead. The tail seat upper and lower body adopts compact structure design, and the strict scraping process ensures the contact stiffness of each joint surface. The tail seat structure is more conducive to the machining of long shaft parts.


2.7 Chuck and Cylinder

The standard chuck of this machine tool is imported 8-inch hollow hydraulic chuck, the specification is φ210. The chuck can be easily replaced with a variety of fixture, it has fast adaptability, can meet the requirements of users processing a variety of parts. Other specifications of hydraulic chuck and cylinder can also be select.

2.8 Hydraulic and Lubrication
The hydraulic system uses a variable vane pump, and the hydraulic tank is placed behind the bed and isolated from the outside world by protection. Each hydraulic circuit adopts superposition valve installation mode, compact structure and easy installation. The pressure of each executive cylinder of the hydraulic system can be adjusted separately and has a pressure protection device. Hydraulic tank with air cooling device. The standard configuration uses a centralized quantitative automatic lubrication system.

2.9 Cooling and Chip Removal
According to the different material of the workpiece, it can be configured with chain-type chip remover, scraper or magnetic scraper chip remover. The chain-plate chip extractor is suitable for collecting and transporting all kinds of rolls, clumps and blocks of chips. The scraper is suitable for conveying copper, aluminum, cast iron and other debris. The magnetic scraper chip extractor is mainly used for the transport of cast iron chips less than 150 mm in length in wet processing. The chip eliminator is automatic, and the start and stop of the chip eliminator can be controlled by the M command.

The cooling box and chip extractor are separated from the main machine to ensure that the machine precision is not affected by cutting heat. The cooling water is directly connected with the cooling water port on the tool holder after the cooling pump is drawn out and is ejected by the tool holder nozzle to provide cooling and lubrication for parts and tools to ensure the machining accuracy of the workpiece and improve the service life of the tool. In addition, according to the user's requirements for the layout of the machine, the chip extractor can be selected as a rear or side type.


2.10 Electric System
2.10.1 Electric system design
The electrical system design of the machine conforms to GB 5226.1-2008 electrical standard. The power circuit of the circuit has overcurrent and short circuit protection, and the related actions of the machine tool have corresponding interlocks to ensure equipment and personal safety. The electrical system has a self-diagnosis function, and the operation and maintenance personnel can observe the running status of each part of the machine tool at any time according to the indicator light and display. The main electrical components are imported products, and other electrical components are products of Sino-foreign cooperation, so as to ensure the safety and reliability of the machine tool.
2.10.2 Electric box
The enclosed electric box is designed with a special structure to isolate the heat source to ensure the normal operation of the electrical equipment. The electric box adopts slot board wiring structure, the component layout and wiring are reasonable, neat, beautiful, and easy to maintain. Reserve some space in the electrical box to expand functions.
2.10.3 Maneuvering control box
Use the rotary maneuvering control box, it is easy to operate with one hand.
2.10.4 Security protection
The machine tool has alarm device and emergency stop button, which can prevent all kinds of sudden failure to the machine damage. The software design is reasonable, the alarm can display text and alarm number through the display. Machine tool according to different situations will be divided into three types of alarm treatment: emergency alarm implementation of "emergency stop"; Implement "feed hold" for general alarm; Only Prompt for operation errors.

3.Performance Index

3.1 Technical Specification

Item		Unit	Specification	Comment
			LT260-600
The maximum rotating diameter on the lathe bed		mm	520
The maximum cutting length		mm	600
The maximum cutting diameter		mm	360
The standard cutting diameter		mm	210
The maximum rotating diameter on the slide		mm	360
Spindle end type and code			A2-6
Spindle hole diameter		mm	62
Processing bar diameter		mm	50
Spindle	Spindle speed range	r/min	50~4500
	Spindle continuous output torque	Nm	130	FANUC SYSTEM
			130	GSK SYSTEM
	Spindle maximum output torque	Nm	235	FANUC SYSTEM
			177	GSK SYSTEM
	Spindle speed series		Stepless speed change
	Main motor output power	kW	11/15min(βilp22)
Chuck	Chuck diameter	inch	8²
X-axis rapid traverse speed		m/min	24
Z-axis rapid traverse speed		m/min	30
X-axis itinerary		mm	200
Z-axis itinerary		mm	645
Overall tailstock itinerary		mm	450
Tailstock sleeve itinerary		mm	100
Taper of tailstock sleeve taper hole		Mohs	5#
Standard tool holder form			Horizontal servo 12 positions
Tool size	Outer circle cutter	mm	25×25
	Diameter of boring bar	mm	Ф40/Ф32/Ф25/Ф20
Maximum bearing capacity	Disk parts	kg	200	Include chuck, etc Machine tool accessories
	Axial parts	kg	500
Machine weight		kg	4350/4900
Dimensions(Length*Width*Hight)		mm	2500*1690*1750	Chip extractor not included

Comment 1:Spindle speed is the speed range in the standard configuration, when installing other configuration chuck, fixture or main motor, please note the limit speed of the selected chuck or fixture.
Comment 2:CNC machine tools have strict requirements for power supply. If the user's power grid fluctuates more than ±10%, the voltage regulator must be added, otherwise the CNC machine tool will not work normally, and even unpredictable results will appear.
Comment 3: The maximum torque of the machine tool is constant, but as the cutting diameter becomes larger, the cutting parameters that can be achieve will become smaller, so the machining parameters of the machine tool should be adjusted accordingly according to the workpiece size.
Comment 4:The weight of the machine is for reference only. The final weight is based on the machine packing list.
3.2 Primary Accuracy
The accuracy of the machine implements the GB/T16462-2007 "CNC horizontal lathe accuracy testing" standard.

Inspection item		Factory standard
Radial runout of spindle shaft diameter		0.003mm
Processing workpiece roundness		0.002mm/Ф75mm
Processing workpiece cylindricity		0.008mm / 150mm
Processing workpiece flatness		0.008mm/Ф200mm
Processing workpiece surface roughness		Ra0.8μm
Positioning accuracy	X-axis	0.005mm
	Z-axis	0.005mm
Repeat positioning accuracy	X-axis	0.003mm
	Z-axis	0.003mm

3.3 Processing Range

      Horizontal 8 station tool rest interferogram               Horizontal 12 station tool rest interferogram                          LT260-600 Working stroke diagram.


                                 Comment:In the figure above, the black parameter indicates the machine stroke configured with an 8-inch medium chuck,
                                            and the red parameter indicates the machine stroke configured with a 10-inch medium chuck.

       

4.Major Dispositions

No.	Name	Manufacturer	Model and specification	Amount	Comment
1	Numerical control system	FANUC SYSTEM	FANUC 0i-TF	1set	★
		GSK SYSTEM	GSK988TD
2	Main motor	FANUC SYSTEM	βiIP22/8000	1 set	★
		GSK SYSTEM	ZJY265A-11AM-B5
3	X-axis servo motor	FANUC SYSTEM	βiSc12/3000-B(With belt lock)	1 set	★
		GSK SYSTEM	130SJTF-MZ096C(A9II)
4	Z-axis servo motor	FANUC SYSTEM	βiSc12/3000	1 set	★
		GSK SYSTEM	130SJTF-M096C(A9II)
5	X-axis ball screw	Import	φ32×12-635	1 set	★
6	Z-axis ball screw	Import	φ32×12-1117	1 set	★
7	X-axis guide	Self-production	Sliding guide	1 set	★
8	Z-axis guide	Import	35 specifications	1 set	★
9	Tailstock guide	Self-production	Sliding guide	1 set	★
10	Main shaft bearing	Import	100 in the front, 90 in the back	1 set	★
11	Lead screw bearing	Import	25X62X15	1 set	★
12	Turret	Import	Horizontal 12 station servo	1 set	★
13	Chuck cylinder	Import	8″hollow	1 set	★
			8″intersolid
			10″intersolid / hollow
14	Tailstock	Self-production	Hydraulic belt locks	1 set	★
15	Hydraulic station	Import	pressure 6Mpa, Flow rate 24L/min	1 set	★
16	Cooling pump	Import	Pumping head 35m,Flow rate 30L/min	1 set	★
17	Chip removal	Made in China	Postposition chip removal	1 set	★
		Made in China	Side chip removal	1 set
		Made in China	Chip box	1 set

Comment: The ones marked with "★" are standard, and the others are optional.

5.Random Attachment

5.1 Random Accessories

No.	Name	Manufacturer	Model and specification	Amount	Comment
1	Floor mat iron	Made in China		1 set
2	Turning tool holder	Import	Boring tool clampφ40	3	12 Station cutter tower
			End tool holder 25X25	1
			Round knife press knife block 25X25	6 set

comment: The number and specifications of tool holders can be changed according to user requirements.
5.2 Random Documents

No.	Name	Amount	Comment
1	Safety instruction	1	Electronic edition
2	Maintenance manual	1	Electronic edition
3	Transport and installation instructions	1	Electronic edition
4	Operating instruction	1	Electronic edition
5	Certificate of conformity	1
6	Packing list	1
7	Chuck,cylinder operation manual (or maintenance manual)	1 for each
8	Lubrication pump specification	1	Electronic edition
9	Turret instruction manual	1	Electronic edition
10	Hydraulic system operating instructions	1	Electronic edition
11	Machine tool instruction Manual (Electrical)	1	Electronic edition
12	Programming and operation manual	1	Electronic edition
13	Driver unit user manual	1	Electronic edition
14	Circuit book	1	Electronic edition

Comment:The delivered file may vary depending on the configuration. Contact your technical support.

6.Operating Factors
6.1 Operating Environment
The working environment of the machine tool is good or bad, which has a direct relationship with the performance and normal work of the machine tool. If the temperature is too high, the control mechanism in the numerical control system will fail or malfunction. Temperature is too low will worsen lubricating system and hydraulic system working conditions cause machine breakdown or damage to the machine tool parts. Therefore, we recommend that the machine be used under the following conditions:

• The machine should be placed indoors and in a dry environment. The machine tool foundation is made according to the requirements of the machine tool foundation.

• Power supply voltage: rated power supply voltage is AC380V,voltage fluctuation range is -10~+10%,power supply frequency: 50Hz±1%.Beyond this range, users need to purchase their own regulated power supply.
• Ambient air temperature:in 5ºC ~ 40ºC range;And 24 hours average temperature should not exceed 35ºC.
• Ø Humidity: The maximum temperature is 40ºC, the relative humidity is not more than 35%, and the humidity change does not cause condensation.
• The dust concentration in the air shall not be greater than 10mg/m³, and shall not contain acids, salts, and corrosive gases.
• Atmospheric pressure 86 ~ 106kpa
• Install the machine away from vibration and heat sources. The power of the machine tool installed in the plant should be below 0.5G (G is the acceleration of gravity).
• Idling noise level:≤83dB(A)

6.2 Examination Requirement
During machine tool testing, testing instruments, testing tools should be placed in the testing environment for enough time, so that they are in an isothermal state, the detection should also avoid the impact of air flow, sun or external heat flow and other factors, the assessment of the accuracy of the machine position of the ambient temperature to 20ºC, but generally should meet the following conditions.

• Ambient temperature between 15 ° C to 25 ° C
• Before testing, the machine should be kept in the testing environment for no less than 12 hours.
• The machine occupies the space of any temperature gradient not exceeding 0.5ºC/h.

7 Installation Acceptance

7.1 Machine Installation

• After the machine reaches the destination, the user is responsible for unloading and lifting during installation and commissioning, and the manufacturer is responsible for the initial adjustment after it is safely moved to the working position.
• Before the commissioning personnel arrive, the user needs to complete the pre-installation preparation work proposed by the manufacturer.
• The user needs to notify the manufacturer two days in advance for commissioning, and before installation and commissioning, the user and service personnel jointly unpack the box, count according to the contract quantity and packing list, and lead the three-phase power cord to the electric cabinet, provide lifting equipment and cooperate with the manufacturer's installation and commissioning personnel.
• After the installation and commissioning work, the final acceptance of the machine tool is carried out.

7.2 Machine Acceptance
The machine acceptance work is divided into two parts: pre-acceptance and final acceptance.

• Pre-acceptance:The manufacturer shall notify the user after passing the inspection, and the user shall send relevant personnel to the manufacturer's work site for pre-acceptance of the equipment. The acceptance shall be conducted according to the inspection items prepared by the manufacturer according to the relevant national inspection standards. After passing the inspection, both parties sign the minutes of the acceptance meeting.
• Final acceptance: At the user site, Shenyang Baihang sent personnel to install and debug, the acceptance content is still according to the pre-acceptance content of the inspection, after the final acceptance, the two sides signed the "CNC installation and debugging final acceptance Completion Order".

Acceptance related matters:

• Acceptance standards refer to the technical agreement and factory certificate. After acceptance, confirm by the user, fill in the "CNC installation and commissioning final acceptance Completion Sheet".

Machine tool warranty period:

• After the acceptance of the machine tool, it begins to enter the warranty period, the warranty period is twelve months; In case of failure during the warranty period, the manufacturer shall provide free maintenance service (except for machine damage caused by user's human causes); The cost fee will be charged for the failure caused by improper use of the user; After the machine tool arrives at the user's factory, if the installation and commissioning work cannot be carried out on time or the final acceptance cannot be carried out due to the user's reasons, the warranty period will expire 18 months after the arrival of the user, and the three guarantees service will no longer be provided.
• The accuracy index of the machine tool shall be checked according to the accuracy inspection table of the technical agreement and certificate. If the user disputes the test results, the user can prepare the test equipment and designate the national certification test center to conduct the retest. If the test results are consistent with the technical contract, the costs incurred during the test period shall be borne by the user. Before the test, the user must seal the machine and keep it in storage. If the user turns on the machine, it will be regarded as acceptance.