GHK-400 CNC Roller Ring Lathe

GHK-400 roll ring special CNC lathe technical file

1. The main purpose and basic composition of the machine tool

1.1 Main uses

This machine is a CNC lathe special for lathes. It is mainly used for roughing and semi-finishing of infinite cold hardened ball milled cast iron and tungsten carbide roller ring with maximum workpiece diameter of 400mm, maximum workpiece length of 500mm, and maximum workpiece weight of 800KG. The use of carbide, ceramic blades, cubic boron nitride or other materials can be used for rough and semi-finish turning and repairing of the outer circle, end face and various hole profiles of the roll ring.

The machine tool can also be used for the processing of shaft parts made of cast iron, steel and non-ferrous metals in the same weight range as the roller ring. It can perform semi-finishing and finishing of outer circles, end faces and various complex curved surfaces.

The machine tool control system has the functions of linear interpolation, circular interpolation, various fixed cycles and constant-speed cutting of the end face. It can adopt automatic programming method or manual programming method, and also can adopt mixed programming method.

1.2 Basic composition of machine tool

The machine tool is composed of bed, headstock, tool holder, main motor base, deceleration mechanism, automatic chip removal, guide rail protective cover and other parts. The machine tool chuck adopts Taiwan-made hydraulic chuck and rotary cylinder to achieve fast clamping of the workpiece. The headboard is installed on the left end of the bed. The guide rail for moving the tool post adopts cast iron intermediate frequency quenching guide rail. The main drive of the machine tool is driven by the 22KW AC servo spindle servo spindle motor driving the internal gears of the bedside box to drive the spindle to rotate. Stepless speed change through AC servo spindle system. The spindle can achieve 5-350r.p.m speed. Both the front and rear bearings of the main shaft adopt high-precision adjustable clearance double-row short cylindrical roller bearings, which have good rigidity, high rotation accuracy and easy adjustment and maintenance.

Based on the principle of equality and mutual benefit. This technical agreement is formulated, and this technical agreement is a contract. The machine is equipped with a SIMENES 828D CNC system. The main drive is an AC servo spindle speed control device. The longitudinal (Z axis) and lateral (X axis) are precision ball screw drives. The vertical and horizontal movements of the tool holder are driven by an AC servo motor, and the positioning accuracy and repeated positioning accuracy are high. There is a button stand and color LCD display on the knife holder.

2. The main specifications of the machine tool

2.1 Main specifications

2.1.1 Maximum workpiece diameter ………………………… 400mm

2.1.2 Maximum workpiece length ………………………… 500mm

2.1.3 Maximum workpiece weight ………………………… 1t

2.1.4 Maximum cutting force of the tool post …………………… 25KN

2.1.5 Maximum torque of faceplate ………………………… 9.9KN.m

2.1.6 Center height of the machine tool ........................ 350mm

2.2 Main drive parameters

2.2.1 Spindle speed series ………………………… stepless

2.2.2 Speed ​​range of main rotation …………………… 5 ～ 500r / min

2.2.3 Faceplate diameter ………………………… φ400mm

2.3 Feed drive

2.3.1 Feeding quantity series ………………………… stepless

2.3.2 Longitudinal (Z direction) feed range …………………… 0.001 ～ 3000mm / min

2.3.3 Horizontal (X direction) feed range …………………… 0.001 ～ 2000mm / min

2.3.4 Longitudinal rapid traverse speed (Z axis) …………………… 3000mm / min

2.3.5 Horizontal fast moving speed (X axis) …………………… 2000mm / min

2.4 Motor

2.4.1 Servo spindle motor power …………………… 22KW

Speed ​​………………………… 1500r / min

2.4.2 Power of longitudinal AC servo motor …………………… 4.87KW

Rated torque ………………………… 27N.m

Rated speed …………………… 3000r / min

2.4.3 Horizontal AC servo motor power …………………… 3.3KW

Rated torque ………………………… 16N.m

Rated speed …………………… 3000r / min

2.5 Other

2.5.1 Machine dimensions (length × width × height) …………………… 3890 × 1840 × 1360mm

2.5.2 Machine weight .............................. 5.5t

3. Introduction to the main structure of the machine tool

3.1 Bed

The machine bed is an integral cast iron base with an independent four-rail structure. The two on the front side are the guide rails for the tool carrier, and the two on the rear side are the longitudinal guide rails for the tailstock. The two are staggered from each other in the lateral direction. Therefore, the movement of the tool holder over the entire length of the bed rail will not be hindered by the tailstock, which has the advantages of high guiding accuracy and good accuracy retention.

Two ball screws in the front of the bed for medium frequency quenching of the tool holder moving guide rail, and a power transmission source for longitudinal movement of the tool holder carriage are installed in the middle, and a planetary gear reducer is installed on the right end of the bed.

The left end of the bed is a box-shaped structure for installing and fixing the headboard, and it has good rigidity by reasonably arranging the internal ribs.

There are many longitudinal, transverse and arc-shaped ribs inside the bed, which make it reasonably constitute a number of closed or semi-closed box-shaped structures, so that the guide rail and the two screw supports and the interconnection between them form a The force is uniform as a whole, so that the entire bed has sufficient rigidity. In order to facilitate chip removal, a chip removal channel is provided between the two cast iron guide rails, and the iron chips are discharged to the chip box of the chip conveyor through the channel in.

Install stroke stroke slot plate at the lower part of the front of the bed to control the Z axis stroke of the tool post.

The bed guide rail adopts medium and intermediate frequency quenching, and the quenching hardness can reach above HRC50. Can fully meet the needs of use.

3.2 Headstock and main motor base

The machine tool is driven by an AC servo spindle motor, and drives the gears in the box through direct connection with the I axis of the headstock. Drive the spindle to obtain a speed of 5 ~ 500r / min.

The coupling between the servo spindle motor and the transmission mechanism is directly connected to the I axis, and the spindle is driven by the 4-speed gear to transmit power to the hydraulic chuck, so that the faceplate reaches the specified torque. The bearings of the main shaft adopt high-precision double-row radial short cylindrical roller bearings with adjustable radial clearance, so the main shaft rotates smoothly and the precision is high, thus ensuring the high precision of the processed parts.

Rotary position detection encoder is installed on the rear axis of the headstock main shaft. The spindle speed can be controlled to achieve constant linear speed cutting requirements.

Spindle chuck uses three-jaw hydraulic chuck.

The main motor is placed on the motor base.

The headstock is also equipped with spindle forward and reverse jog control buttons, which can be used by the operator for jog operation when clamping, testing and finding the workpiece.

Inside the headstock is equipped with a gear transmission device, a large gear modulus, to ensure that the gear is sufficiently rigid and excellent impact resistance, the output machine tool needs to transfer torque. Ensure machine tool life cycle and failure repair rate. The front and rear bearings of the main shaft adopt high-precision double-row short cylindrical roller bearings, which can adjust the radial clearance to realize the smooth operation of the main shaft, high accuracy, and long-term accuracy retention.

Inside the headstock is equipped with a lubricating device. Inside the headstock is a closed oil sump that can provide lubrication for the bearings inside the headboard.

3.3 Tool holder carriage and 8-station tool post

The tool post is the executing part of the longitudinal and horizontal feed motion of the machine tool. It is composed of the carriage of the knife holder and the horizontal slide plate and the four-station knife table installed on it.

The tool post carriage is set on the two guide rails at the front of the bed. The longitudinal (Z direction) AC servo motor drives the tool post along the guide rail longitudinally through the high-precision planetary gear reducer and the longitudinal ball screw vice. The Z direction drive mechanism is placed The right part of the bed. The transverse transmission mechanism is set on the carriage of the knife holder, and the transverse movement of the horizontal slide plate and the four-station tool post (X direction) is driven by a transverse AC servo motor through a high-precision planetary gear reducer transmission mechanism, a transverse ball screw nut pair.

Four-station tool post is an electric rotary tool post, which can be equipped with 4 different kinds of turning tools at the same time according to different processing requirements. To achieve the requirements of processing different positions. Ensure high production efficiency and high processing accuracy.

The right side of the horizontal slide plate is equipped with a radial movement position control bumper groove plate and a bumper.

3.4 Feed box

The feed box is part of the longitudinal and transverse feed motion transmission chain. The high-precision planetary gear reducer is used to transmit the force of the servo motor to the longitudinal and transverse ball screws, the large carriage and the horizontal slide plate to realize the Z axis longitudinal X The axis moves laterally. The longitudinal planetary gear reducer is installed on the right end of the bed, and the horizontal planetary gear reducer is installed in front of the large carriage.

3.5 Machine tool lubrication

The lubrication of this machine tool adopts a separate lubrication system device for each part.

3.5.1 Headstock box lubrication

The lubricating motor and lubricating gear pump are arranged behind the headstock. The oil supplied through the gear pump enters the oil volume adjustment oil separator in the headstock box to distribute the lubricating oil to each lubrication point to ensure that each lubrication station is fully lubricated. One of the oil is sent to the oil observation window to facilitate the operation permit to observe whether the oil path is smooth at any time.

3.5.2 Tool post lubrication

Tool holder lubrication adopts centralized automatic quantitative electric lubrication device. The automatic centralized lubricating oil pump inputs the lubricating oil into the adjustable flow oil separator and distributes it to the lubrication of the large carriage and the bed rail, and the horizontal slide and the large carriage rail. Lubrication of transverse ball screws and bearings, and lubrication of longitudinal ball screws.

3.5.3 Longitudinal ball screw bearing lubricating

Using grease lubrication.

3.5.4 Hydraulic oil pump station

Hydraulic oil for hydraulic chuck automatic clamping and loosening is supplied by a separate hydraulic pump station. The hydraulic pump station has functions such as pressure monitoring, preventing leakage, and maintaining pressure.

3.5.5 Hydraulic line

The lubricating oil pipe adopts corrosion-resistant nylon pipe. The hydraulic oil uses rubber hose.

3.6 Chip conveyor

Machine chip conveyor is installed behind the bed. When the iron chips flowing down through the chip removal channel behind the bed enter the chip conveyor, they are automatically discharged into the iron chip box on the right end of the bed.

3.7 Machine tool protection

3.7.1 Bed rail protection

The guide rail of the bed adopts stainless steel tensile integral protective cover. Cover all the guide rails of the knife holder without iron filings.

3.7.2 Tool holder rail protection

Knife rail adopts stainless steel tensile integral protective cover. The moving rail of the knife holder is completely covered, and there is no iron filings on the rail.

3.7.3 Protection of main shaft coupling

The main shaft coupling adopts a welded integral protective cover, and a pair of main shaft couplings are covered in the protective cover.

3.7.4 Servo motor protection

X, Z servo motors are covered with stainless steel welding.

3.7.5 Machine rail oil protection

Install an oil receiving device on the guide rail in front of the bed, and set up an oil recovery box on the right end.