Technical offer

Ryazan Heavy Duty CNC Lathe

Model RT317RF3-6

Fanuc 0i-TC CNC Control

with Manual Turn option

and Conversational Programming

2006

The Ryazan RT317RF3-6 CNC Lathe has a hydraulically shifting headstock with (4) gear ranges. This Ryazan heavy duty CNC lathe is designed for chucking and between-centers turning of cylindrical, stepped or contoured work pieces, as well as thread cutting. The machine’s rigidity and its technical characteristics allow full use of advanced cutting tools for machining work pieces made of ferrous and non-ferrous metals.

The Fanuc Manual Turn option enables the operator to carry out manual turning operations. X and Z Manual Pulse Generators (MPG’s) allow manual control of turning operations, including thread cutting, when the machine control is in Manual Turn mode. Conversational programming in the Manual Turn mode prompts the operator for information on each machining move. After machining the 1^st part in manual mode, the CNC control can “save” each machining move. Then the part can be machined automatically. And the completed program can be saved for future use. This makes it possible to machine parts more precisely and quickly than with a conventional lathe.

Lathe Set

Operator panel 1

Control panel 1(2)

Electrical cabinet 1

Headstock encoder for threading 1(2)

X-axis ball-screw pair 1

Built-in X-axis sensor 1(2)

Cross feed drive 1(2)

Built-in Z-axis sensor 1

Longitudinal feed drive 1

Cutting zone protection 1

4-jaw chuck Ø1250 mm. 1

Head stock 1

Bed 1

Carriage 1(2)

Tail stock 1

Support 1(2)

Open rest 1(2)

Steady rest 1

Roller rest 1(2)

Coolant unit 1(2)

The lathe includes:

- Fanuc CNC control with dual MPG’s for X and Z axis control

- Additional magnet-based portable MPG for X and Z axis control during setup

- Fanuc 60 kW spindle drive and Fanuc feed drives ( 98 HP 30 minute cycle !)

- Telemecanique low-voltage electrics

- 8-position Sauter Turret with horizontal rotation axis

- Full length rear splash guarding

- Movable cutting zone splash enclosure and chuck guard mounted on linear guideways

- Motorized tailstock body traverse

- Collision switches mounted on carriage to prevent steady rest and tailstock accidents

- Chuck and steady rests as standard accessories

Upon customer’s request:

- The manufacturer of the hydraulic power source and automatic lubrication system can be negotiated on factory orders.

- The manufacturer of the chip conveyor can be negotiated on factory orders, with the electrics prepared for connection.

- Conventional lathe cross slide with 4-sided manual indexing turret

- Additional steady and open rests.

- Machine design allows for unusually long center distances

- A boring attachment, delivered without boring bar, can be installed on the carriage.

TECHNICAL FEATURES (Metric)

Maximum diameter of work-piece : - set over bed....................................................................................................... - machined over bed............................................................................................ - set and machined over carriage.........................................................................	1700 1400 1200
Maximum work-piece length, mm .......................................................................	6000
Diameter of cylinder spindle bore, mm...............................................................	128
Internal cone of headstock spindle	Metric 140
Internal cone of tailstock spindle	Metric 80
Height of cutting tool in a tool holder..................................................................	32…40
Maximum carriage travel: - longitudinal....................................................................................................... - cross..................................................................................................................	5500 750
Discreteness of travel assignment: least increment of movement - along X axis...................................................................................................... - along Z axis.......................................................................................................	1 micron 1 micron
Spindle speed limits, rpm ...................................................................................	2, 5…630
Carriage feed travel limits, mm/min: - along X axis...................................................................................................... - along Z axis.......................................................................................................	3…2500 3…2500
Carriage rapid travel, mm/min: - along X axis...................................................................................................... - along Z axis ......................................................................................................	6500 6500
Number of simultaneously controlled axis...........................................................	2
Main drive power, kW (continuous / 30 min cycle)............................................	60 / 75
Maximum set work-piece weight, kg: - between the centers……………………………………………………….. - between the centers with 1 rest……………………………………………. - between the centers with 2 rests......................................................................	16000 20000 25000
Lathe overall dimensions (together with the separately placed equipment) about, mm: - length................................................................................................................. - width................................................................................................................. - height.................................................................................................................	9500 2355 2250
Lathe weight (with included accessories) approximately, kg: ............................	25,400

TECHNICAL FEATURES ( Inch )

Maximum diameter of work-piece : - set over bed....................................................................................................... - machined over bed............................................................................................ - set and machined over carriage.........................................................................	66.9” 55” 47”
Maximum work-piece length, mm .......................................................................	236”
Diameter of cylinder spindle bore, mm...............................................................	5”
Internal cone of headstock spindle	Metric 140
Internal cone of tailstock spindle	Metric 80
Height of cutting tool in a tool holder..................................................................	1.25…1.57
Maximum carriage travel: - longitudinal....................................................................................................... - cross..................................................................................................................	216” 29.5”
Discreteness of travel assignment: least increment of movement - along X axis...................................................................................................... - along Z axis.......................................................................................................	1 micron 1 micron
Spindle speed limits, rpm ...................................................................................	2, 5…630
Carriage feed travel limits, inches/min: - along X axis...................................................................................................... - along Z axis.......................................................................................................	0.12…98 0.12…98
Carriage rapid travel, mm/min: - along X axis...................................................................................................... - along Z axis ......................................................................................................	255 255
Number of simultaneously controlled axis...........................................................	2
Main drive power, HP (continuous / 30 min cycle)…………………………….	78 / 97.5
Maximum set work-piece weight, lbs: - between the centers……………………………………………………….. - between the centers with 1 rest……………………………………………. - between the centers with 2 rests…………………………………..	35,200 44,000 55,000
Lathe overall dimensions (together with the separately placed equipment) about, inches: - length................................................................................................................. - width................................................................................................................. - height.................................................................................................................	374” 93” 89”
Lathe weight (with included accessories) approximate, lbs: ..............................	55,880

Short description of the lathe set

1. Bed

The 1000mm (39.37”) wide ways are integral with the cast iron bed. The bed and the hardened and ground prismatic guide-ways (double Vee-ways) provide maximum rigidity and vibration-resistance during machining.

The bed consists of 2 joined parts and serves as a base for mounting lathe components.

The bed has three prismatic guide-ways (Vee-ways). Two form the base for the carriage. The third, along with a flat way, is for the tail stock. The guide-ways are hardened -- HRCэ 44…55.

The cast iron bed has built-in chip chutes for removal of chips and coolant. The chip pans are on rollers and are removable from the back side of the lathe. The bed design also allows for the use of a chip conveyor.

There is an additional guide-way cast into the lower part of the bed that provides additional support for the apron and carriage.

2. Head stock

The head stock is mounted on the head of the bed.

The spindle, with 5” (128mm) bore, is mounted on three supports. The front support is a double-row bearing with short cylinder rollers, which works together with a thrust bearing. The rear support is a double-row bearing with short cylinder rollers. The middle support is a radial bearing with short cylinder rollers.

This design increases stability and ensures a high degree of vibration resistance.

The head stock is a four-speed box with automatic shifting between gear ranges. Two hydraulic cylinders provide for automatic gear range shifting.

The variable speed drive motor provides infinitely variable speeds in each range.

The headstock contains a feedback encoder for thread cutting.

3. Tail Stock

The lathe is equipped with a powerful tail stock with quill taper M80 which allows machining of work-pieces up to 16,000 kg (35,200 lbs) between centers without the use of rests. The tail stock has a prismatic tailstock quill with a built-in live center. A special bushing with outer gear sector, preventing the center from turning, is used for drilling operations.

Tail stock travel along the bed is motorized (5000mm or 197”). Maximum quill travel is 200 mm (7.9”).

Spindle bearings of the tailstock quill are double-row with short cylinder rollers.

4. Carriage

Carriage unit is inlaid with rectangular hardened steel guide-ways with HRC 59...61 hardness, which provide the cross slide with high rigidity, durability and prolonged original accuracy. The guide-ways of the cross-slide are inserted with bronze bearing surfaces.

There is a collision limit switch on the carriage capable of turning off the longitudinal feed in case of possible collision with rests or the tailstock.

The carriage and cross slide are pre-machined to accept a factory-designed boring bar or tool head for machining bores. The optional factory-designed boring equipment consists of a heavy duty bar holder with removable top piece capable of holding a 160mm ( 6.3”) diameter boring bar.

5. Turret

A Sauter 8-position automatic indexing turret with horizontal rotation axis is provided with the machine. The number of turret positions can be specified on factory orders. It is also possible to exchange this turret for a Sauter automatic indexing turret with vertical rotation axis.

6. Ball-Screw Pair (cross)

A ball-screw pair for cross-slide travel is mounted in the carriage housing recess.

The two-piece ball nut construction allows backlash adjustment.

7.Coolant Unit

Coolant system is provided for coolant feed to the cutting tool in the cutting zone and consists of a tank with a pump and a movable system of piping on the cross slide with devices for coolant supply regulation.

8. Cross Feed Drive

The cross feed drive provides travel of the cross-slide along “X” axis by use of a Fanuc high-torque electric motor. Movement is transmitted with a timing belt to the ball screw pair. The two-piece ball screw allows for backlash adjustment.

9. Longitudinal Feed Drive

The longitudinal feed drive provides feed and rapid travel of the carriage along “Z” axis by use of a Fanuc high-torque electric motor.

Movement is transmitted through a double worm gear transmission, with one of the worm gears spring-loaded to eliminate backlash.

10. General Accessories

Chuck diameter 1250 mm (49.2”)

Outer diameter chucking of work-piece, clamped in the outside jaws, mm:

- minimum……………………………………………..75 (3”)

- maximum……………………………..…………. .. 850 (33.5”)

- maximum (through spindle bore)………..…………..140 (5.51”)

Inner diameter chucking of work-piece, clamped in the outside jaws, mm:

- minimum…………..………………………………..210 (8.26”)

- maximum (without jaw over-hang…..…....…………1115 (42.9”)

Through Spindle Bore, Outer diameter of work-piece, clamped in the inside jaws, mm:

- minimum…………………………......………………75 (3”)

- maximum (without jaw over-hang)….....…………….120 (4.72”)

Maximum rotation frequency, rev/min.......…………….630

Chuck weight, kg……………………………………….. 490 (1,078 lbs)

Note: the above information is valid only for the included chuck and jaws.

Text Box:

Rests

Setting diameter ranges, mm:

Roller steady rest…………...180 (7”)…….650 (25.6”)

Closed roller rest (photo)...…600 (23.6”)…950 (43.3”)

Roller rest…………………...900 (35.4”)….…1300 (51”)

Boring Bar Attachment

The cross slide and carriage are pre-machined to accept a factory-designed boring attachment that will hold up to a 6” diameter boring bar. Maximum recommended boring bar size, without compromising the lathe design, is 9.84” diameter x 137.89” length.

11. Electrical Equipment

The Fanuc 0i-TC CNC control, combining the latest achievements of computer engineering and manual control, provides wide control possibilities both in manual programming mode and in CNC mode.

The lathe may be operated in 4 modes:

Manual turning with use of MPG hand-wheels;
Teach-in mode (after manual machining of the 1st part);

Inserting machining cycles and parameters in a Conversational Mode;
Operation by standard G-code programming.