Single-column, universal rotary lathe 1516, characteristics, purpose

Purpose and scope of application, passport

The universal turning lathe 1516 is capable of processing workpieces made of ferrous and non-ferrous metals, and the main technical characteristics and parameters correspond to GOST 44–93. In addition to its use in domestic enterprises, the machine was exported to dozens of countries around the world.

The single-column design with a faceplate at the bottom and two supports at the top helps reduce the workload on all the main components of the machine. Vertical and horizontal supports allow the following operations on the machine:

• boring holes;
• trimming;
• milling;
• grinding;
• drilling holes of various diameters;
• turning of cylindrical and conical surfaces;
• thread cutting;
• using special tools to create curved surfaces.

Some operations will require additional equipment for the machine. The equipment operates with casting, rolling and forgings.

The lathe's passport can be downloaded for free from the link - Passport of the universal single-column rotary lathe 1516.

Electrical circuit of the power supply of the machine 1516

Electrical circuit of the power supply of the rotary lathe 1516

Characteristics of the electrical equipment of the machine 1516

The electrical equipment of machine tools consists of electric motors, electrical controls, limit switches to limit the movement of moving parts of the machine and control equipment.

The machines are equipped with five three-phase asynchronous electric motors with a squirrel-cage rotor:

1. main drive motor 1M1;
2. oil pump drive motor 1M2;
3. cross member movement motor 1M3;
4. motor for installation movements of the upper support, installation movements of the side support 4M1 and three single-phase asynchronous capacitor electric motors with a squirrel-cage rotor to drive the lubricator of the lubrication system;
5. cross member motor 1M4;
6. upper support motor 2M2 and 2M3

The following voltage values ​​are accepted on the machine

• 380V three-phase alternating current, frequency 50 Hz - power supply of power circuits;
• 110V single-phase alternating current - power supply to coils of magnetic starters and single-phase electric motors;
• 36V single-phase alternating current - power supply for the circuit for selecting the direction of travel of the stepper finder;
• 24V - DC power supply for local lighting lamps;
• 24V - DC power supply for control circuits and electromagnetic couplings;
• 90V - DC power supply to the stepper finder coils.

All electrical equipment for controlling the machine is located in the niche of the machine. The machine is controlled from a pendant control panel.

The electrical equipment of the machine performs the following functions:

• Faceplate control:
• start-up in operating mode;
• start in jog mode;
• step change in speed with a rotating faceplate;
• maintaining a stepwise constant cutting speed when turning end surfaces with the upper support (changing the speed of rotation of the faceplate using a cam rack and a limit switch);
• faceplate stop.

Caliper control:

• working feeds (feed selection and switching on);
• installation movements (selection of movement speed and switching on).

Moving the cross member.

Description of electrical equipment operation

The electrical circuit provides for the following operations

• starting and stopping the main drive electric motor and the lubrication system electric motor;
• raising and lowering the cross member.

Main drive motor control

The main drive electric motor is controlled from a pendant control panel using buttons 1Кн2 - “Start” and IKHI - “Stop”.

When you press the 1Kn2 - “Start” button, the main drive starter 1K1 is turned on. At the same time, the 1P1 relay for limiting the idle speed of the main drive electric motor is turned on, which operates with a time delay. If the faceplate is not turned on during this time, the open contact of this relay (circuit 4) will turn off the main drive starter.

The main drive electric motor is turned off by pressing the IKHI - “Stop” button.

When the faceplate is turned on, the IKHI button is blocked by the closing contact of the step finder SHIT. The main drive motor can only be turned off after the faceplate has been turned off and the step finder is in the zero position.

Workspace dimensions

The machine is a large-sized piece of equipment and is therefore suitable for installation in the workshops of various enterprises. Dimensions parameters:

• length – 317 cm;
• width – 300 cm;
• height – 4.1 m.

The total weight of the machine is 20 tons. The diameter of the faceplate is 140 cm. In the initial state, the maximum weight of the workpiece being processed is 6.3 tons.

Specifications

The versatility of the machine and the number of technological operations that can be performed on it directly depend on the technical characteristics of the equipment. The rotary turning unit under consideration belongs to machines of normal accuracy class. Technical characteristics of the unit:

• maximum diameter of the workpiece being processed is 160 cm;
• the greatest height of the workpiece that can be processed is 1 meter;
• faceplate rotation range – 1–250 rpm;
• stepless adjustment of the faceplate rotation speed;
• the faceplate rotation speed has 2 stages;
• the electric motor has a power of 55 kW;
• the crossbar moves at a speed of 45 m/min;
• horizontal movement of the caliper is 95 cm;
• movement of the caliper slider in the vertical direction – 70 cm;
• number of positions at the turret head – 5;
• crossbar travel distance 65 cm;
• the tool holder has 4 positions;
• the caliper has 18 feeds;
• caliper feed limits in the range of 0.03–12.5 mm/rev;
• the maximum torque allowed according to technical documentation is 25 kNm.

Also optionally installed on the machine is a cooling system, a module for thread cutting, as well as for turning curved surfaces. Such additional tools and mechanisms can significantly speed up the operation of the machine and increase its productivity.

Structural and technological properties

• Reverse rotation of the faceplate is transmitted from the main drive electric motor.
• Three axes are controlled by the CNC system.
• Sufficient load-bearing capacity of the table ensures processing of parts up to 6300 kg.
• The tooling system consists of a turret with five slots, each of which holds a separate tool.
• The movements of the working units are carried out through ball screw gears.
• Rotating the slide at an angle from + 45 to - 45 degrees allows you to sharpen conical products.
• The design of the machine provides for the use of additional devices that expand the technological capabilities of the equipment.
• It is possible to equip it with various CNC systems at the buyer's choice.
• To prevent chips and coolant from flying out, additional protective guards are installed.
• The workpiece is mounted and secured on the table surface using clamping jaws or special fastening devices.
• Available with a tool cooling system.

Location of components

The supporting structure of the entire machine, on which all the main components of the unit are mounted, including the body - a large, heavy hollow cast frame. The machine must be secured to a thick foundation layer, which will eliminate unnecessary vibration and allow it to support the weight of the unit.

Flat guides are located on the front side of the bed. The caliper and cross member move along these structures. The main drive gearbox is located on the other side of the frame. Devices for moving the crossbar are located on the top of the frame.

The assembly of the entire rotational system is located on the table body. It is based on:

1. Faceplate. During the working process, it rests on circular guides, which are located in the upper part of the body. There are T-shaped grooves on the front part of the faceplate. The workpiece being processed is attached to them using additional equipment. The faceplate itself has a built-in workpiece clamping mechanism. The quality of processing and the safety of the entire work process depend on this module.
2. Spindle. The upper part is fixed to the center of the faceplate. It rests on the angular contact bearing from below. The function is to transmit, the main movement is from the drive.
3. The faceplate drive is designed to transmit, to impart movement to the spindle.

For the vertical arrangement of machine parts there is a stand with a crossbar. The manufacturer has provided for emergency situations, so the stand is made with a safety margin.

A traverse with two calipers moves along the racks, which is easy to fix in the desired position. One of the calipers is a revolving caliper, and the second is a boring caliper. The turret contains a carriage and a slider with a turret head. On the second support there is a slider with a tool holder.

Kinematic diagram of machine 1516

Kinematic diagram of rotary lathe 1516

The kinematic diagrams of machines 1512 and 1516 are similar to each other and differ from each other only in the kinematics of the chain of the feed motion transmission mechanism and the number of teeth of the table gears.

Due to the different number of teeth on the table gears, machines 1512 and 1516 have different speed limits for the faceplate speeds with the same gearbox.

The kinematics of the chains of the feed motion transmission mechanism are different for the machines, but their gear ratios are selected in such a way that the total gear ratio of the kinematic chain from the faceplate to the feed box is the same for both machines. This allows you to use the same feed boxes and obtain the same feed amounts.

Gearbox of machine 1516

The gearbox is used to ensure rotation of the faceplate, as well as starting, stopping and changing speeds. Rotation is transmitted to the input shaft of the gearbox from the main drive electric motor through a V-belt drive. The gearbox provides the faceplate with 18 speed levels.

The gearbox is controlled remotely from a pendant remote control.

The presence of electromagnetic clutches in the gearbox allows you to switch speeds on the go and thereby ensure the maintenance of a stepwise constant cutting speed when processing end surfaces.

The gearbox has six shafts mounted on rolling bearings in a housing with a parting plane along the shaft axes for ease of assembly.

At higher speeds, the start is carried out in stages in two, three or four stages. The number of acceleration stages increases with increasing speed of the faceplate.

Switching of clutches during stepwise acceleration is carried out automatically (for a detailed description, see Part 2 of the Operating Manual 'Electrical equipment of machine tools').

Changing the speed from 1st to 12th stage is carried out by turning on the corresponding combinations of electromagnetic clutches.

To enable the jog mode of operation of the faceplate, which is used when installing and aligning the part, it is necessary to place the switch on the pendant control panel in the “Jog start” position of the faceplate and press the “Start” button of the faceplate.

There are no special braking devices in the gearbox, and the faceplate is braked by simultaneous activation of three electromagnetic clutches.

Machine table

There are no fundamental design differences between the tables of machines 1516 and 1512. The machine parts are similar and differ from each other only in size.

The table consists of a body with circular guides, a faceplate with a spindle and a faceplate drive.

The table body is a cast iron with a developed system of ribs, giving it greater rigidity.

At the top of the table body there are annular projections that fit into the annular grooves of the faceplate, forming a labyrinth. This prevents lubricant from splashing and protects against chips, cast iron dust, emulsion and other contaminants getting inside the table.

The faceplate is driven from the gearbox through a pair of bevel gears with a circular tooth, then through a cylindrical helical pair: a gear and a ring gear rigidly connected to the faceplate.

Machine feed boxes

The design of the feed boxes of the lateral and vertical supports is the same.

The vertical support feed box is mounted on the right end of the cross member; side caliper feed box - directly to its body.

The feed box body is a box-shaped cast iron with sufficient rigidity. All feed box shafts are mounted on rolling bearings.

The feed boxes are driven from a vertical splined shaft, which receives rotation from the output shaft of the gearbox through the mechanism for transmitting movement to the feed (see Fig. 6).

The feed boxes provide the calipers with 18 working feeds and 18 speeds of installation movements. This is achieved by switching on the appropriate combinations of electromagnetic clutches of the feed boxes (for the switching diagram of electromagnetic clutches, see Part 2 of the Operating Manual 'Electrical equipment of machine tools*).

All gears of the feed boxes are in constant engagement.

A turret head with five slots and holes for attaching a tool is mounted on a cylindrical bushing. Changing the positions of the turret is carried out remotely from a pendant control panel. By pressing the “Turret Head” button, the electric motor for turning the turret head, mounted on the upper end of the slide, is turned on. Rotation from the electric motor is transmitted through gears to the drive shaft.

The main movement (rotation of the faceplate) is transmitted from the electric motor 1 through the V-belt transmission 2 - 3 to shaft I, then through the gearbox, shaft V, bevel gears 25 - 26 and wheels 27-28 is transmitted to the faceplate. The gearbox is equipped with eight electromagnetic clutches, the switching of which allows you to provide the faceplate with 18 rotation speeds ranging from 5 to 250 rpm.

The feeds of the calipers (revolving and side) are borrowed from the faceplate through two independent feed boxes with the same kinematics. Each box is equipped with eight electromagnetic clutches, switching which makes it possible to obtain 16 feed rates for both calipers.

Horizontal feed of turret support . From shaft VIII of the faceplate through gear 28 - 27, bevel gears 26 - 25, 24 - 23, gear 29 - 30 and bevel pairs of wheels 31 and 53, the movement is transmitted to shaft XII of the feed box (shown separately at the top left). From the feed box, the shaft XX of the caliper mechanism receives rotation, and then through gears 52 and a screw pair 65, the turret caliper receives horizontal feed.

Vertical feed of the turret support . From shaft VIII of the faceplate to shaft XXI of the feed box, rotation is carried out along the same chain; Then, through bevel gears 55 - 56, a cylindrical pair of wheels 57, a conical pair 58 and a screw pair 59, the turret caliper receives the feed movement.

Horizontal feed of side support . As before, the movement goes from shaft VIII of the faceplate to shaft XII of the feed box, then through the feed box to shaft XX and then through gears 39 - 41 and screw pair 42, the side caliper receives feed.

Vertical feed of side support . From the faceplate shaft to the feed box shaft XII, the movement proceeds along the same chain, then through the feed box the shaft XXI of the caliper mechanism receives rotation and through the bevel gears 35-36 and the screw pair 43 the side caliper receives feed.

Both supports receive accelerated movement

Location of controls

Controls of the rotary lathe 1516:

• handle for securing the cutting head of the side support;
• screw for fixing the vertical support slider;
• the same screw for mandrel of the cutting tool in the turret socket;
• handle for automatically connecting the machine to the network;
• fixing nut for the rotary slide of the vertical support;
• control pendant;
• flywheels for manual movement of the side support horizontally and vertically.

There are also handwheels for moving the vertical support.

Information about the manufacturer of the rotary lathe 1516

The developer and manufacturer of the 1516 rotary lathe is the Krasnodar machine-tool plant Sedina , founded in 1911.

In 1915, the first lathe was produced. In 1922, the enterprise received its modern name - in honor of turner G. M. Sedin.

In 1935, the first rotary lathe, model 152, was produced, and by 1937, the priority profile of the plant was determined - machine tool building, and first of all, the production of rotary lathes.

Vertical turning machines produced by the Krasnodar Machine Tool Plant, KSZS

• 1А512МФ3
  single-column vertical turning machine with CNC Ø 1250 x 1000
• 1А516МФ3
  single-column vertical turning machine with CNC Ø 1600 x 1000
• 1L532
  - two-column rotary lathe Ø 3150 x 1600
• 1M557
  - two-column rotary lathe Ø 3200 x 1600
• 1286-6
  six-spindle vertical lathe Ø 630 x 750
• 1508
  — single-column rotary lathe Ø 800 x 800
• 1510
  — single-column rotary lathe Ø 1000 x 800
• 1512
  — single-column rotary lathe Ø 1250 x 1000
• 1512F3
  single-column vertical turning machine with CNC Ø 1250 x 1000
• 1516
  — single-column rotary lathe Ø 1600 x 1000
• 1516F1
  - single-column rotary lathe with digital indicator Ø 1600 x 1000
• 1516F3
  - single-column vertical turning lathe with CNC Ø 1600 x 1000
• 1525
  — two-column rotary lathe Ø 2500 x 1600
• 1531M
  single-column rotary lathe Ø 1250 x 1000
• 1541
  — single-column rotary lathe Ø 1600 x 1000
• 1553
  two-column rotary lathe Ø 2300 x 1600

Safety precautions at work

The large-sized lathe 1516 is an object of danger if operating rules are violated. Therefore, only persons who have undergone appropriate training and qualifications are allowed to work with it. It is important to follow basic safety precautions:

• it is necessary to work strictly in special clothing and shoes;
• tuck your hair under your headdress; there should be no hanging edges of clothing;
• at idle, you must initially check the operation of the controls, as well as the serviceability of the lubrication and cooling system;
• before starting work, make sure that the machine is grounded;
• It is prohibited to approach the equipment while under the influence of alcohol, drugs, or medications.

For safety, be sure to check the proper condition of the locking mode of the on and off levers to prevent spontaneous switching from idle to working.

The 1516 rotary lathe is one of the most reliable options for turning equipment designed for processing large-sized workpieces made of ferrous and non-ferrous metals, as well as various alloys. The unit provides the ability to perform a variety of operations, therefore it is considered a universal machine and is popular among workshop workers. The main advantage is the ability to process parts weighing up to 6 tons.