Lathes Sliven Bulgaria appointment. Domains. Multi-start threading
Information about the manufacturer of the CU 500 screw-cutting lathe
Manufacturer of screw-cutting lathe CU 500 - company JSC "ZMM - Sliven" (ZMM-Sliven), which is part of the machine tool holding ZMM Bulgaria Holding (Zmm-Bulgaria Holding Ltd.)" is the largest manufacturer of universal lathes in Europe.
CU-500 (SU-500) Universal screw-cutting lathe. Purpose, scope
The CU-500 (SU-500) screw-cutting lathe is designed to perform various turning operations and cut metric, modular, inch and pitch threads. Workpieces are mounted in centers or chucks.
Using the conical ruler (optional) it is possible to process conical surfaces.
The principle of operation and design features of the machine
The CU500 universal lathe is equipped with 21 forward and 11 reverse speed steps of the spindle speed. The speed steps of the machine are indicated in the passport in figures 4-3, 4-4, 4-5 and 4-6.
According to the customer's order, the machine can be supplied with a spindle end according to DIN55027/ISO702-III or according to USAS B-5.9-D1/ISO702-II (Camlock).
The spindle system, gear transmissions and other mechanisms in the gearbox are lubricated automatically through the gear oil pump and by splashing.
The mechanisms in the feed box are lubricated automatically by a piston oil pump and through splashing.
Modifications of the CU 500 screw-cutting lathe
- CU 500- basic model; spindle bore Ø 62 mm. Spindle front bearing diameter Ø 100 mm.
- CU 500M- increased hole in the spindle up to Ø 72 mm. Bearing diameter Ø 120 mm.
- CU500MT- increased hole in the spindle up to Ø 100 mm. Bearing diameter Ø 140 mm
- CU500RD- frequency converter built into the main drive - stepless spindle speed control.
General view of the CU-500 (SU-500) screw-cutting lathe
Photo of the CU-500 screw-cutting lathe
Photo of the CU-500 screw-cutting lathe
Photo of the CU-500 screw-cutting lathe
The location of the components and controls of the lathe CU-500 (SU-500)
Location of CU-500 Lathe Controls
Location of CU-500 controls
The list of components of the controls of the lathe CU-500 (SU-500)
- bed
- Cabinets
- Spindle speed box
- Gearbox
- caliper box
- lower caliper
- Upper caliper (incisal sled)
- Headstock rear
- Drive unit
- Running shaft
- Guitar
- Toolholder
- emergency stop
- guitar cover
- Shields - fencing
- Lunettes - set
- Electric control
- Handle for switching to "left" and "right" threads
- Remote Control
- cooling device
- Lighting device
- Control lever for switching in "forward" and "reverse" rotation or for turning off spindle rotation
- Knob for selecting "normal" or "increased" thread pitch and feeds
- Knob for selecting reverse order ranges
- Handle for selection of turnover stages
- Stop button (emergency)
- Handle for selecting feed or thread pitches
- Handle for switching movement to the drive shaft or drive screw
- Handle for turning the split nut on and off
- Control lever for longitudinal and transverse movements
- Handwheel for manual longitudinal movement
- Handwheel for manual cross feed
- Flywheel for manual movement of the upper caliper
- Nonius to account for longitudinal movement
- Quill handwheel
- Handle for locking the quill
- Handle for locking the tailstock
- Main switch
- Button to turn on and off fast motion
- Emergency stop pedal
- Guide lubrication button
- Multi-start threading plate
Brief description of the main components of the machine CU-500 (SU-500)
Spindle speed selection
The CU400 universal lathes are equipped with 21 forward and 11 reverse speed steps of the spindle speed. The speed steps for each specific machine model are shown in figures 4-3, 4-4, 4-5 and 4-6.
The selection of the speed stage for all models is made with handles 24, 25 and 26.
The disk, in fig.4-3 and fig.4-5, located on the front side of the gearbox and controlled by handle 24 fig.4-1, has four fixed positions. The sector of the disk in which the required revolutions are located is set to the left or to the right of the vertical line, depending on where the fixed position of the disk is.
Handle 26, Fig. 4-2, which has two fixed positions, the pointer is set in the direction of the corresponding sector.
Note: For model CU500MT, the sector with required revolutions fig.4-4 is positioned against the arrow on the plate.
The hub, fig. 4-6, controlled by the handle 25, fig. 4-1, is provided with three color indications (green, red and blue) fig. 4-6. The color against the background of the required turnover stage is set opposite the arrow on the plate.
Starting and stopping the spindle for rotation in the forward or reverse direction is performed by the handle 22 Fig. 4-1.
A warning: Spindle speed change ONLY after the spindle has stopped. Any attempt to change speed while the spindle is spinning runs the risk of serious damage to the gearbox and voids the warranty.
Feed drive
The feed mechanism of the machine for feeding and threading includes:
- Mechanism for normal and extended pitch, left and right threads: it is located in the gearbox pos.3 fig.4.2 and its adjustment is made by handles - pos.23 and 18;
- Guitar, fig.4-2 pos.11: its adjustment is made by moving the lowest gear block, according to fig.4-7; 4-8; 4-9 and 4-10 or a plate mounted on the front of the gearbox;
- Gearbox position 4 of Fig. 4.1: its adjustment is made by handles 28 and 29 for thread pitch or feed and handle 30 for thread type and feed;
- caliper box: automatic movement of the caliper feeds is carried out by the drive shaft and the caliper mechanism. Turning on and off the longitudinal or transverse feed of the caliper is done with the handle 32 Fig. 4-1. The direction in which the handle moves corresponds to the direction of movement of the caliper.
The movement of the caliper during threading is carried out through the lead screw and the split nut of the caliper box. The detachable nut is engaged to the drive screw by means of the handle 31 Fig. 4-1.
Between the handle for turning on the automatic feeds and the handle for engaging the split nut, a guard is provided that ensures that only one of them is turned on.
The caliper is controlled with the nut hooked through the handles 22 Fig. 4-1.
In addition to the infeed movement, the caliper is equipped with a fast travel device with a separate electric motor.
The fast travel of the caliper is switched on by setting the handle 32 Fig. 4-1 to automatic feed in the desired direction of movement and pressing the button 41 Fig. 4-2 to turn on the electric motor. The caliper box is equipped with an overrunning clutch, which ensures that the caliper is switched on at high speed both when the feed box is turned off and on.
Setting up a threading machine
The machine can be configured to cut metric, inch, modular, and pitch threads as indicated on the machine's face plate.
Procedure:
- Set the revolutions and turnaround with knobs 24, 25 and 26 fig.4-1 and according to the thread plate;
- With the handle 23, Fig.4-2, set the mechanism to a normal or increased step;
- Handle 18, fig. 4-2 set the direction (left or right thread);
- Adjust the lowest gear block of the guitar to pos.11 fig.4-2 according to the thread plate;
- Set the crank multiplier 28, Fig.4-1 according to the thread plate (A; B; C; D);
- Set the selector mechanism with the knob 29, fig.4-1 according to the thread plate (1, 2, 3, 4, 5, 6, 7 and 8);
- Set the type of thread with the handle 30, Fig.4-1;
- Using handle 31, Fig. 4-1, hook the split nut to the screw;
In addition to the threads indicated, the table on the front plate also shows three additional threads that are adjusted in the above manner.
In addition to the indicated threads, the table on the front plate also shows three additional threads, the setting of which differs from that described above in the text. (Follow additional label).
Multi-start threading
Procedure:
- Set up the carving machine with the thread pitch multiplied by the number of strokes, according to paragraph 4.6;
- Perform the cutting of the first thread;
- Manually rotate the spindle through the belt washer so that the number 0 from plate 44, Fig. 4-2, is opposite the pointer;
- Set the handle 18, fig.4-2 in the neutral position;
- Rotate the spindle in the direction indicated on the plate until the number corresponding to the number of thread turns is opposite the pointer;
- Turn on the handle 18 Fig.4-2;
- Carry out the cutting of the next thread, and so on. by repeating steps 3 to 7 until all the strokes of the desired thread have been cut.
A warning: When cutting multiple threads, do not change the cutting speed.
Kinematic diagram of a screw-cutting lathe CU-500 (SU-500)
Kinematic diagram of the CU-500 screw-cutting lathe
The kinematic diagram is given to understand the connections and interaction of the main elements of the machine.
The main components of the CU-500 screw-cutting lathe
(SU-500)
Tailstock of screw-cutting lathe CU-500
Tailstock of screw-cutting lathe CU-500
Schematic diagram of a screw-cutting lathe CU-500 (SU-500)
Wiring diagram of the CU-500 screw-cutting lathe
Electric equipment of the machine CU-500 (SU-500)
The CU-500 (SU-500) machine is equipped with a main motor, a high-speed motor, a cooling unit pump motor, a panel in the electrical cabinet, a control panel with controls, working lights, connecting cables and wires, protective equipment, etc.
Wiring and panel in the electrical cabinet as well as the power of the main motor, supply voltage and frequency are made according to the customer's order.
All electric motors are three-phase asynchronous.
The control circuit is powered through a transformer with a secondary voltage of 24V and a frequency depending on the customer's order.
In accordance with safety standards, work lighting from 12V.
For details on the electrical equipment and wiring diagram, see the forwarding electrical documentation attached to this manual.
Short circuit protection
The main electric motor and the electric motor of the cooling system pump are protected against short circuits through safety circuit switches (in the electrical cabinet) and against overload through overcurrent protection (bimetal thermal relays) FT1, FT2, FR1.
Due to the short-term operation of the electric motor for high speed, it is provided only with a chain switch.
The transformer (TC) is protected by fuses FU1 ... FU4.
For mechanical and electrical protection, this machine is equipped with the following microswitches:
- Electrical cabinet door microswitch - SQ1
- Universal chuck shield microswitch - SQ3
- Clutch microswitch - SQ4
- Guitar Box Door Micro Switch - SQ5
- Emergency “stop” button (red mushroom) on the gearbox control panel - SB0
- Emergency “stop” button (red mushroom) on the command panel of the caliper box - SB5
- Wiring, connectors and all electrical elements of the electrical equipment of the machine are placed inside the machine body and protected from mechanical, atmospheric or chemical influences.
- The machine is equipped with protection against restarting the main motor, provided that the spindle is not released (SQ4 is turned off)
This machine can be delivered with an additional emergency “stop” pedal on customer request (option).
CU-500 (SU-500) Screw-cutting lathe. Video.
Technical characteristics of the lathe CU-500 (SU-500)
| Parameter name | 16K20 | CU-400 (SU 400) | CU-500 (SU-500) |
|---|---|---|---|
| Main parameters of the machine | |||
| Accuracy class according to GOST 8-82 | H | H | H |
| The largest diameter of the workpiece installed above the bed, mm | 400 | 440 | 500 |
| The height of the axis of the centers above the flat guides of the frame, mm | 215 | 210 | 245 |
| The largest diameter of the workpiece processed over the support, mm | 220 | 230 | 300 |
| The greatest length of the workpiece, installed in the centers (RMC), mm | 710, 1000, 1400, 2000 |
1000, 1500, 2000 | 1000, 1500, 2000 |
| Guide width, mm | 360 | 360 | |
| The greatest distance from the center axis to the edge of the tool holder, mm | 225 | ||
| The largest drill diameter when drilling steel parts, mm | 25 | ||
| The largest mass of the workpiece processed in the centers, kg | 460..1300 | ||
| The largest mass of the workpiece processed in the chuck, kg | 200 | ||
| Spindle | |||
| Spindle hole diameter, mm | 52 | 62 | 62 |
| The largest diameter of the bar passing through the hole in the spindle, mm | 50 | 60 | 60 |
| Spindle speed in forward direction, rpm | 12,5..1600 | 20..100; 80..400; 400..2000 | 20..100; 80..400; 400..2000 |
| Spindle speed in the opposite direction, rpm | 19..1900 | 20..100; 80..400; 400..2000 | 20..100; 80..400; 400..2000 |
| Number of direct spindle speeds | 22 | 21 | 21 |
| Number of reverse spindle speeds | 11 | 11 | 11 |
| Spindle end according to GOST 12593-72 | 6K | ||
| Spindle end according to ISO702-II/USAS B5.9D1 ISO702-III/DIN 55027 | 8 | 8 | |
| Tapered spindle bore according to GOST 2847-67 | Morse 6 | 80 | 80 |
| Spindle flange diameter, mm | 170 | ||
| Chuck diameter, mm | 250 | 250 | |
| Maximum torque on the spindle, Nm | 1000 | 100 | 100 |
| Caliper. Submissions | |||
| The greatest length of longitudinal movement, mm | 645, 935, 1335, 1935 | ||
| The greatest length of transverse movement, mm | 300 | 250/ 260 | 250/ 260 |
| Speed of fast longitudinal movements, mm/min | 3800 | 3800 | 3800 |
| Speed of fast transverse movements, mm/min | 1900 | 1900 | 1900 |
| The maximum allowable travel speed when working on stops, mm/min | 250 | ||
| The minimum allowable speed of movement of the carriage (caliper), mm / min | 10 | ||
| The price of division of a limb of longitudinal movement, mm | 1 | ||
| The price of dividing the limb of the transverse movement, mm | 0,05 | ||
| Longitudinal feed range, mm/rev | 0,05..2,8 | 0,04..12 | 0,04..12 |
| Range of transverse feeds, mm/rev | 0,025..1,4 | 0,02..6 | 0,02..6 |
| Number of feeds longitudinal | 42 | 120 | 120 |
| Number of cross feeds | 21 | 60 | 60 |
| Number of threads to be cut - metric | 64 | 64 | |
| Number of threads to be cut - modular | 64 | 64 | |
| Number of cut threads - inch | 64 | 64 | |
| Number of threads to be cut - pitch | 64 | 64 | |
| Limits of pitches of metric threads, mm | 0,5..112 | 0,5..120 | 0,5..120 |
| Limits of pitches of inch threads, threads / inch | 56..0,5 | 60..1/4 | 60..1/4 |
| Limits of pitches of modular threads, module | 0,5..112 | 0,125..30 | 0,125..30 |
| Limits of steps of pitch threads, pitch diametral | 56..0,5 | 240..1 | 240..1 |
| The greatest force allowed by the feed mechanism on the cutter - longitudinal, N | 5884 | ||
| The greatest force allowed by the feed mechanism on the cutter is transverse, N | 3530 | ||
| incisor sled | |||
| The greatest movement of the incisive sled, mm | 150 | 140 | 140 |
| Moving the incisive sled by one division of the limb, mm | 0,05 | ||
| The largest angle of rotation of the incisive sled, degrees | ±90° | ±90° | ±90° |
| The price of division of the scale of rotation of the incisive sled, deg | 1° | 1° | 1° |
| The largest section of the cutter holder, mm | 25 x 25 | 25 x 25 | 25 x 25 |
| Height from the support surface of the cutter to the axis of the centers (height of the cutter), mm | 25 | 30 | 30 |
| Number of cutters in the cutting head | 4 | 4 | 4 |
| tailstock | |||
| Tailstock quill diameter, mm | 70 | 70 | |
| Taper of the hole in the tailstock quill according to GOST 2847-67 | Morse 5 | Morse 5 | Morse 5 |
| The greatest movement of the quill, mm | 150 | 180 | 180 |
| Movement of the quill by one division of the limb, mm | 0,1 | ||
| The value of the transverse displacement of the body of the headstock, mm | ±15 | ±10 | ±10 |
| electrical equipment | |||
| Main drive electric motor, kW | 11 | 7,5; 11 | 7,5; 11 |
| Fast travel drive electric motor, kW | 0,12 | 0,55 | 0,55 |
| Coolant pump motor, kW | 0,125 | 0,09 | 0,09 |
| Dimensions and weight of the machine | |||
| Machine dimensions (length width height) RMTs=1000, mm | 2795 x 1190 x 1500 | 2435 x 1185 x 1286 | 2435 x 1185 x 1304 |
| Machine weight, kg | 3010 | 2210 | 2280 |
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- works for amounts from 7000 rubles. performed under contract
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- gratitude to our organization from the authority -. We have been working with the Committee for Nature Management for 7 years already, we maintain and develop their website.
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