Application of Large Bore Lathe-Machining of Hydraulic cylinder tube cylinder barrel?

Recently, our company received an inquiry. A distributor approached us. His client needs to machine hydraulic cylinder barrels and requires us to provide a manual lathe with a through hole diameter of 150mm, a swing diameter of 600mm, and a length of 3000mm.

What is hydraulic cylinder tube cylinder barrel?

Hydraulic cylinder tube cylinder barrel is the key component of hydraulic cylinder. It is a hollow cylindrical structure, mainly made of metal materials (such as carbon steel, alloy steel, etc.). Structurally, there is a smooth bore inside the cylinder barrel to accommodate the piston and seals, and the piston reciprocates in the bore of the cylinder barrel, thus realizing the conversion of hydraulic energy and mechanical energy. The cylinders’ outer round part usually needs to have high strength and precision to ensure the stability and reliability of the whole cylinder in the working process. There may also be mounting lugs, flanges or other connecting structures at both ends to connect the cylinder to other mechanical components.

Application field of hydraulic cylinder tubecylinder barrel

Construction machinery field

In excavators, hydraulic cylinder tubes are used to drive the extension and contraction of the digging arm. For example, in large excavation operations, multiple cylinders on the excavator arm (such as boom cylinder, bucket rod cylinder, and bucket cylinder) work together to enable the excavator to precisely dig, lift, and unload material. The cylinder size of the boom cylinder is large, and the pressure and load it bears are also large to meet the needs of supporting the weight and digging force of the entire mining arm. The lifting cylinder and tipping bucket cylinder of the loader also rely on the cylinder to achieve the working function. When the loader loads the material, the lifting cylinder pushes the bucket up, lifting the material to the appropriate height, and then flips the bucket by tipping the bucket cylinder to complete the unloading process.

Metallurgical industry field

In the process of steel production, the hydraulic cylinder is used to drive the roll clearance adjustment of the rolling mill. Through the precise movement of the cylinder, the distance between the rolls is controlled, so as to achieve the precise rolling of the steel thickness. For example, in the hot tandem rolling unit, there are a number of high-precision hydraulic cylinder cylinders, whose dimensional accuracy and sealing requirements are extremely high to ensure the rolling quality and dimensional accuracy of steel. The opening and closing of furnace doors in metal smelting equipment also often use hydraulic cylinders. The cylinder drives the opening and closing of the furnace door, so that the smelting process can proceed smoothly, and can effectively prevent heat loss and metal liquid splash.

Automobile manufacturing field

The automation equipment on the automobile production line makes extensive use of hydraulic cylinders. For example, the working arm movement of the auto body welding robot relies on the hydraulic cylinder to achieve the cylinder. These cylinders can precisely control the position and attitude of the welding robot to ensure the welding quality. The hydraulic suspension system of the automobile also uses the cylinder cylinder. Through the movement of the piston in the cylinder, the height and stiffness of the suspension are adjusted to provide a comfortable driving experience for the car, but also to adapt to different road conditions and driving requirements.

Shipbuilding industry

In the ship’s steering system, the hydraulic cylinder cylinder is used to drive the rotation of the rudder blade. The precise steering of the rudder blade is crucial to the safety of the ship’s navigation, and the hydraulic cylinder cylinder can provide enough power and precise control to ensure that the ship can accurately change course under various navigation conditions. The ship’s cargo lifting equipment, such as cranes, also relies on hydraulic cylinders to lift and move the cargo. These cylinders need to have a high load capacity and corrosion resistance to meet the requirements of the Marine environment and cargo handling.

 

Based on his needs, we have selected a large aperture universal lathe CLD6163. The maximum turning diameter over the bed is 630mm, and the through hole diameter of the spindle is 150mm, which can perfectly meet the customer’s requirements. The following are the technical parameters of CLD6163：

Item	Parameter	Unit	Specifications	Remarks
Capacity	Max  swing over bed	mm	f630
	Max swing over slide	mm	f340
	Machine bed width	mm	550
	Max workpiece length	mm	3000
	Maximum turning length	mm	2750
Spindle	Spindle end form		Screw thread
	Spindle through hole diameter	mm	150
	Spindle speed	r/min	28-700.
	Spindle speed series		3 gear
	Main motor power	kW	11	Spindle servo
	Outside diameter of chuck	mm	400	Hand three jaw
Tool  post	Form		Manual
	Number of stations		4
	Tool section	mm	32×32
Feed	X-axis fast moving speed	mm/min	2300
	Z-axis fast moving speed	mm/min	4000
	x-stroke	mm	320
	z-stroke	mm	750
	X-axis feed series/range	mm/r	32/0.04-0.65
	Z-axis feed series/range	mm/r	32/0.1-1.46
	Metric thread type/range	mm	32/1-15
	Number/range of thread in inch	T.P.I.	26/14-1
Tailstock	Quill dia.	mm	100
	Quill travel	mm	250
	Taper of center	MT	5#
Others	Lubrication form		Automatic intermittent lubrication
	Lubrication pump capacity	L	2
	Cooling pump head	m	10
	Cooling pump flow	L/min	100
	Machine weight	kg	5500
	Machine tool appearance (LxWxH)	mm	5100×1500×1400
	Total electrical capacity	kVA	12

The CLD6163 is a general purpose large hole metal cutting machine suitable for turning internal and external cylinders, cones and other rotating surfaces, turning a variety of metric and imperial threads, drilling and pulling oil grooves, etc. This series of machine tools is suitable for processing cast iron, steel and various non-ferrous metals and other materials.

The machine adopts a flat bed oblique structure, easy operation and adjustment, which is conducive to chip removal, high-quality and high-strength cast iron casting the whole bed, good shock absorption, aging treatment, good rigidity, high precision, the width of the bed guide rail is 550mm, the use of ultra-audio quenching and precision grinding and plastering, scraping process, low friction resistance, long precision retention, effectively ensure the accuracy and service life of the machine tool.

The spindle box is an integral gear box type spindle unit, three-speed frequency conversion, stepless transmission in the file, the main motor adopts low-frequency and high-torque spindle servo motor, the output torque is large, the start-stop response is fast, which not only meets the requirements of fine turning, but also can achieve efficient cutting.

The main shaft adopts the quenched precision grinding helical gear transmission structure, which has high transmission efficiency, strong load capacity, more stable transmission, low noise and longer service life of the gear.

Key words: Manual lathe, Universal lathe, Large bore lathe