Vertical drilling and grooving machine SVP 2. Vertical drilling and grooving machines - woodworking machines. Preparation for work and maintenance

Drilling machines are designed for drilling through and blind round holes in the material. Depending on the direction of drilling, machines are divided into vertical and horizontal.

According to the number of simultaneously working drills, single-spindle and multi-spindle machines are distinguished.

Design features. Vertical slot drilling machines are used to perform two types of operations: drilling holes and processing grooves with rounded edges, in which the radius of curvature is equal to the radius of the end mill. As a rule, the machine has one vertically located spindle, which is moved along its axis with the help of a lever. The belt pulley is put on a hollow shaft-coupling that rotates with the pulley. Inside, along the entire length of the coupling, there is a groove into which the spindle, placed inside the coupling, enters with its crest. Such fastening allows not only to transfer the movement from the coupling to the spindle, but also to move it vertically.

This movement is carried out either manually by means of a lever that covers the clutch with a fork, or by means of a foot pedal and a linkage. To maintain the material in the desired position for processing, there is a rotary console.

The industry produces universal drilling and groove machines with manual (SVP - 2) and mechanized supply (SVA - 2) of the tool to the part.

On fig. 124 shows a diagram of a vertical drilling and grooving machine with manual feed SVP - 2. A column 1 is installed on the cast-iron base of the machine 14. An electric motor 4 and a spindle mechanism 7 are mounted in its upper part, on which a cartridge 8 with a cutting tool is mounted. In the middle part of the column there is a bracket 12 that can move along the column. It is driven by handwheel 3 and fixed vertically by handle 2 depending on the height of the workpiece.

Rice. 124. Scheme of a vertical drilling and grooving machine with manual feed SVP-2:
1 - column; 2 - handle; 3 - flywheel; 4 - electric motor; 5 - spindle movement lever; 6 - handle for moving the spindle; 7 - spindle mechanism; 8 - cartridge; 9 - eccentric clamp; 10 - table; 11 - flywheel for moving the table; 12 - bracket; 13 - spindle pedal; 14 - cast-iron bed; 15 - spindle pedal thrust

A slide is provided on the bracket, along the guides of which, with the help of the handwheel 11, the table 10 moves, which can be rotated 90 ° in both directions around the horizontal axis. The table has a stop ruler and an eccentric clamp 9.

Inside the base of the column there is an axis on which the pedal 13 of the spindle with a drill is fixed. Rod 15 connects the pedal lever to the spindle movement lever 5 in the head. There is a spring on the rod to return the spindle to its original position.

The handle 6 is connected to the axis of the lever 5 and is designed to move the spindle down and brake when the handle is raised. Spindle rotation is carried out from a two-speed electric motor 4 through a V-belt transmission. The belt is tensioned when moving the plate with the electric motor along the guides with the help of a screw and a nut.

Technical characteristics of the SVP machine:

• Drilling diameter (mm) - up to 50
• Drilling depth (mm) - up to 150
• Drill RPM - 3000 and 4500
• Groove length (mm) - up to 200
• Motor power (kW) - 1.6 - 2.2
• Machine weight (in kg) - 360

Multi-spindle vertical machines are mainly used for knot drilling. The presence of different diameters of special (cork) drills allows you to select them according to the required size without rearrangement.

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Woodworking machinery

Vertical drilling and grooving machines

Machine construction. Vertical drilling and grooving machines are produced with manual (SVP-2) and mechanical (SVA-2M) feed. Drilling and grooving vertical machine with manual feed SVP-2 is shown in fig. 1. A spindle driven by a belt drive from an electric motor and a table are installed on the column of the machine. The work spindle rotates in bearings and is enclosed in a guide sleeve that moves up or down from the pedal or handle. At the end of the spindle there is a chuck for mounting a drill or end mill with a maximum diameter of 40 mm.

The machine table is located on the horizontal guides of the bracket and has a longitudinal feed through the rack and pinion mechanism from the handwheel 9. The bracket together with the table can be adjusted in height in accordance with the height of the workpiece with the handwheel and fixed in a given position with a removable handle.

In addition, the table can be rotated to the desired angle or set vertically if you need to drill a hole at an angle to the base surface of the part or at its edge. The workpieces are fastened with an eccentric clamp.

Drilling and grooving vertical machine with mechanical feed SVA-2, unlike the SVP-2 machine, is equipped with a pneumatic cylinder for moving the sleeve with a spindle, as well as pneumatic clamps.

Selecting the operating mode. The spindle speed of drilling machines usually does not change. However, the speed of different points of the end cutting edges of the drill is different. The points furthest from the drill axis have the highest cutting speed. As you approach the center of the drill, the circumferential speed of the main movement decreases, and the speed of the translational movement of the feed for all points is the same. Therefore, in the central part of the hole, the wood fibers are not cut; but they are crushed, moved apart by the center and partially destroyed. The feed per revolution So of a drill for softwood is taken equal to 0.7 ... 2.2 mm, hard - 0.1 ... 0.5 mm. Smaller values ​​should be assigned when drilling deep holes of small diameter.

Rice. 1. Drilling and grooving vertical machine with manual feed SVP: 2: 1 - column, 2 - table lifting handwheel, 3 - electric motor, 4, 11 - handles, 5 - spindle, 6 - chuck, 7 - clamp, 8 - table, 9 - handwheel of the longitudinal feed of the table, 10 - bracket, 12 - pedal

Setting up machines. The type and diameter of the drill or end mill is selected depending on the nature of the drilling. Drills for drilling along the fibers cannot be used for making holes perpendicular to the fibers. The angle of sharpening of twist drills must correspond to the direction of drilling relative to the grain of the wood.

The drill diameter is chosen depending on the size of the hole. In this case, it should be taken into account that the diameter of the resulting hole is larger than the diameter of the drill by 0.2 ... 0.35 mm due to the breakdown of the hole due to the beating of the drill.

Drills are mounted on the spindle with chucks or installed in the spindle. Drills with cylindrical shanks of only one diameter can be installed in a chuck with a locking screw (Fig. 2, a); it does not provide accurate centering of the drill relative to the spindle axis.

The most widespread are three- and two-jaw self-centering chucks (Fig. 2, b). They allow you to fix drills with different shank diameters. First, the threaded part of the cartridge is screwed onto the spindle. The drill in the chuck is fixed with cams, shifting them with a nut in the radial direction. Clamp the drill with sufficient force so that it does not rotate during operation. Spindle

manually, make sure that the drill is fixed correctly and has no runout. The accuracy of installing a drill in a cam chuck depends on the accuracy of the manufacturing of the chuck and the degree of its wear.

The table is rearranged in height so that at the extreme upper position of the spindle, the distance from the top of the drill to the working surface of the table is 20 mm greater than the height of the workpiece.

If it is necessary to drill a hole obliquely to the base surface of the part, the table is rotated to the required angle. The position of the table is adjusted with a handwheel or handle, and the amount of movement is counted on a scale.

The stops that limit the course of the table are set depending on the length of the socket. When drilling holes, the machine table is fixed with a locking device. The stroke of the sleeve with the spindle is limited by a stop, which is set in height depending on the depth of the hole or nest. The end stops basing the workpiece are adjusted depending on the working conditions.

Rice. 2. Installation of a drilling tool on the spindle: a - in a chuck with a locking screw, b - in a three-jaw self-centering chuck; 1 - drill, 2 - screw, 3 - chuck, 4 - spindle, 5 - nut, 6 - clamping jaws

Distinguish drilling of holes by marking, by stops and using templates (jigs).

When drilling according to preliminary marking, end stops are not required. Using the marks, each time the part is oriented on the table relative to the drill. If you need to drill several holes according to the marking, located at the same distance from the edge of the part, use a guide ruler (Fig. 3, a). The ruler is fixed on the table so that the required distance a is provided from the axis of the drill 3 to the working surface of the ruler.

Rice. 3. Setting up a vertical drilling and grooving machine: a - setting the guide line, b - setting the end stops; 1 - table, 2 - ruler, 3 - drill, 4 - stops

Drilling along stops should be performed when processing large pairs of parts with several holes of the same diameter (Fig. 3, b). Stops in the form of spring plates are fixed in the grooves of the guide ruler. The distance a ive between the stops is made equal to the distance between the holes in the part. The part is based on the end face along the next stop, and the unused stops are sunk by the part into the groove of the ruler.

Templates are used to drill multiple holes in panel parts. The hole pattern of the template corresponds to the hole pattern of the finished part.

The clamp is placed on a stand near the hole to be drilled and securely fixed with a locking screw.

Work on machines. One worker works on the machine. It turns on the feed, the clamps are automatically triggered, the spindle is fed onto the workpiece and drilling is performed. The spindle feed rate is set depending on the diameter, depth and location of the drilled hole in relation to the wood fibers. In machines with mechanized feed, the speed is controlled by a throttle. The machine operator stacks the finished parts in a stack.

The groove is sampled in the following order. First, without a side feed of the table, two holes are drilled at the ends of the future groove. Then the gap between the round sockets is removed by the slot milling method with the side feed of the table. In this case, the chip width should not exceed 1.5 of the cutter diameter in order to avoid breakage of the cutter. Deep grooves are milled in two or more passes.

During operation, periodically check the groove or hole diameter, as well as their position relative to the edge of the part with a gauge or measuring tool. The deviation of the hole from the perpendicularity of the base surface of the part is allowed no more than 0.15 mm over a length of 100 mm.

At the same time, the quality of the treated surfaces should be monitored. When moss appears, you need to change the drill.

Working at an excessively high feed rate with a blunt drill causes damage to the drill or an unacceptable overload of the spindle drive motor.

Drilling machines designed for drilling through and blind round holes in the material. Depending on the direction of drilling, machines are divided into vertical and horizontal. According to the number of simultaneously working drills, single-spindle and multi-spindle drills are distinguished.

Vertical drilling machines they have one, as in the SVP machine (Fig. 136), a vertically located spindle, moved along its axis with the help of a lever. The belt pulley is put on a hollow shaft-coupling that rotates with the pulley. Inside, along the entire length of the coupling, there is a groove into which the spindle, placed inside the coupling, enters with its crest. Such fastening allows not only to transmit movement from the clutch to the spindle, but also to move it vertically, which is carried out either manually by means of a lever covering the clutch with a fork, or using a foot pedal and leverage. To maintain the material in the desired position for processing, there is a rotary console.

Technical characteristics of the SVP machine

Multi-spindle vertical machines are mainly used for knot drilling. The presence of different diameters of special (cork) drills allows you to select them according to the required diameter without rearrangement.

Horizontal drilling and grooving machines have a drill fixed in a horizontal shaft (spindle) with a chuck. The spindle moves horizontally along the axis with the help of a lever. As a result, the drill goes deeper into the wood. The most commonly used slot and twist drills.

Drilling and grooving machine SVG(Fig. 137) is similar to drilling machines in its design and operation. The difference lies in the drills used: for sampling grooves and nests, they use mainly groove drills, and for drilling - twist drills, which give the best chip ejection from the hole, and cork drills for drilling knots. The machine is equipped with a movable table moved horizontally in the direction perpendicular to the spindle axis by means of a lever and vertically by means of a screw with a flywheel.

When working with a drill, the nest is obtained with rounded edges. Therefore, to give the nest a rectangular shape, the machine is equipped with a special chisel for trimming the edges of the nest. In the absence of such a chisel, with the help of a chisel, the protrusions of the nest are cut or chamfered from the spikes inserted into these nests.

Technical characteristics of the machine SVGD-3

Drilling and grooving machine SvPA with automatic feed equipped with a spindle that oscillates in a horizontal plane. The machine is equipped with a hydraulic drive for fixing the part and for feeding the drill to a given depth. Moving the desktop is done with a foot pedal.

Technical characteristics of the SVPA machine

Multi-spindle drilling and welding machines are used mainly in the manufacture of parts connected on dowels.

Such machines have several fixed or sliding drilling spindles, a table for strengthening parts, and an automatic feed drive.

Nine-spindle drilling machine model SV-9(Fig. 138) has three groups of drilling heads, a table with clamps for fastening and feeding bars, a crank-rocker system for setting the depth of table feed with rack and pinion feed.

Technical characteristics of multi-spindle machines

Drilling power head designed for drilling holes and sampling grooves in parts. The head is installed on modular machines. When installed on continuous-through machines, a special device is mounted to it, with the help of which the head spindle moves after the product during the drilling process. The heads can also be mounted on conventional machines.

Drill head AG2-4 on a skid (Fig. 139) consists of a housing inside which hydraulic cylinders are installed, a carriage with an electric motor fixed to it, and the drilling head itself. The movement of the carriage along the guides of the body is carried out hydraulically using a rod, and the speed of the working stroke is regulated by a throttle (flap). The head can work without nozzles with a single drill and with nozzles: three-spindle type AG2-4-3 and five-spindle type AG2-4-5 for simultaneous drilling of three or five holes in parts. 4 rollers are mounted inside the nozzle body, 3 of which are spindles with drilling chucks at the ends, and the fourth - intermediate - serves to transfer rotation to one of the spindles from the drive gear of the head.

Technical characteristics of the drilling head AG2-4

Chain slotting machine DCA-2(Fig. 140) is equipped with a cutting milling chain, consisting of hinged links and cutters sharpened according to the shape of the tooth (cutter). The chain is driven by a drive sprocket and guided by a special bar (tire). Cutting (chiselling) occurs when the chain is driven into the wood. The nest is rectangular in shape with a rounded bottom. The support of the machine is equipped with a hydraulic drive for feeding the chain to a given depth.

The workpiece is fixed on a movable table that moves vertically with a screw and horizontally with a lever. The table is equipped with a screw to strengthen the part and stops (stops) that limit the horizontal movement of the table in accordance with the length of the selected socket.

To be able to tension the milling chain, the guide rail is made sliding (using a screw). The chain tension must be adjusted before operation. A loose chain will give an uneven finish to the side of the sockets and may come off the bar; A chain that is too tight can break. Usually the chain is tensioned so that with a slight effort of the hand it can be retracted in a straight section on 3-5 mm from the tire.

Technical characteristics of the DCA-2 machine

Information about the manufacturer of the drilling and grooving machine SVPG

The manufacturer of the drilling and grooving machine SVPG-2a is Dnepropetrovsk Machine Tool Plant DSPO currently LLC "Stankostroitel".

In the USSR, the Dnepropetrovsk Machine Tool Plant specialized in milling machines throughout its existence. However, in May 1999, this largest production of machine tools in Ukraine was restructured, and as a result, six independent enterprises appeared, one of which is Stankostroitel LLC.

In Russia, the Kirov Machine Tool Plant produces SVPG-1e drilling and grooving machines, which have one work table.

SVPG-2a Drilling and grooving machine. Purpose, scope

The drilling and grooving machine SVPG-2a is designed for sampling grooves and drilling holes simultaneously in two wood products.

The machine bed is one-piece, box-shaped. On the bed are mounted: two tables with clamps, working on compressed air, with hydraulic regulation of the speed of the working feed. The tables have a horizontal working feed and a vertical adjustment movement.

Feeding the table to the depth of the groove and clamping the workpiece - pneumatic. All this increases the productivity of the machine (compared to SVPG-1R) by more than two times.

The drive of rotation and oscillations of the spindle - from a two-speed electric motor. The spindle is double-sided, the cutting tool is fixed on both sides. The reciprocating movement of the spindle is carried out on linear rolling bearings. Due to the fact that the transmission from the engine to the spindle is belt driven, and the spindle itself moves along the length of the groove on a slide, high accuracy of the drilled groove is achieved.

The working movement of tables with clamped parts to the cutting tool is performed alternately in a continuous cycle. Table retraction is accelerated.

The machine is equipped with a special spindle lock in the extreme position at all grooving lengths, scales for working and installation movements, as well as a device for locating workpieces on tables.

The principle of operation of the drilling and grooving machine

The processing of blanks on the machine is carried out by milling with end mills with axial and radial feeds simultaneously during grooving and only with axial feed when drilling with drills.

Processing cycle - semi-automatic with manual installation of blanks and their removal after processing.

Clamping of workpieces, working feed, return to the initial position and release of the clamp alternately on both tables is carried out in automatic mode with an adjustable duration of the processing cycle.

When the “machine stop” button is pressed or the pressure of compressed air in the pneumatic system drops below 0.4 MPa (4 kgf/cm2), the machine drive is turned off, the tables return to their original position, and the clamps release the workpieces, regardless of the processing phase of the installed workpiece.

Basic movements in the machine

The machine has the following working movements:

• rotational movement of the spindle;
• reciprocating spindle perpendicular to its axis in the horizontal plane;
• reciprocating tables parallel to the spindle axis;
• reciprocating pressure feet.

In addition to working movements on the machine, there are tuning movements:

• vertical movement of the table;
• rotation of the table around a horizontal axis parallel to the axis of the spindle;
• vertical and horizontal pressure.

The reciprocating movement of the spindle is made with an adjustable amplitude and frequency of oscillations, and the table with an adjustable speed of the working feed.

SVPG General view of the drilling and grooving machine

1. Bed SVPG-2A.11.000 - 1
2. Table SVPG-2A.22.000 - 2
3. Clamp SVPG-2A.27.000 - 2
4. Tank SVPG-2A.29.000 - 1
5. Spindle SVPG-2A.31.000 - 1
6. Crank SVPG-2A.50.000 - 1
7. Fencing SVPG-2А.79.000 - 1
8. Chip receiver SVPG-2А.76.000 - 2
9. Pneumatic hydraulic equipment SVPG-2A.66.000 - 1
10. Electrical equipment SVPG-2A.80.000 - 1

1. Groove length adjustment screw
2. Nut fixing the set length of the groove
3. Spindle lock
4. Handle fixing the table from vertical movement
5. Handwheel vertical movement of the table
6. Table feed stop fixing screw
7. Table feed limit stop
8. Stop for limiting the travel of the table back
9. Screw for fixing the stop of the table travel limit back
10. Clamping lever
11. Machine stop button
12. Spindle start button
13. Signal lamp "Spindle is rotating"
14. Switch "Continuous cycle"
15. Warning lamp Live machine
16. Handle of the introductory machine
17. Spindle speed selector knob
18. Table pin in zero position
19. Handle for fixing the table on the axis of rotation
20. Belt tension screw
21. Friction flywheel disengage handle
22. Plate for fixing the disconnected drive of spindle vibrations
23. Feed rate setting button
24. Belt tension nut

Kinematic diagram of the drilling and grooving machine SVPG-2A

The kinematic chains of the machine perform the following movements:

1. Rotation of the spindle of the cutter, drill
2. Oscillatory movement of the headstock in the horizontal plane
3. Working feed of tables from pneumatic cylinders along the spindle axis
4. Adjusting manual movement of the table up and down
5. Clamping the workpiece with a plunger pneumatic cylinder
6. Tilt tables around a horizontal axis parallel to the spindle axis
7. Fixing tables in the right position

A pulley 2 and a roller 3 are mounted on the shaft of the electric motor 1, the rotation from which through the belt 5, the pulley b is transmitted to the spindle I, and through the flywheel 7 to the intermediate shaft II.

The intermediate shaft II is fixed on the motor plate 8 with the possibility of rotation on the axis III, which provides a change in the gear ratio of the friction disk gear 3, 7 by moving the flywheel 7 on the shaft II, and accordingly the frequency of the spindle oscillation I.

A pulley 9 is rigidly fixed on the shaft II, the rotation from which is transmitted through the belt 10 to the pulley 11 fixed on the axis IV.

On the pulley 11 with the possibility of moving in the radial direction and fixing by means of a nut, a stand is fixed, which is a finger of the crank mechanism.

The spindle I, perpendicular to the axis of rotation along two guides, brings the crank mechanism through the connecting rod 12, the lever 13 and the earring 14 into oscillatory motion. The lever 13 is fixed to the frame by means of the V axis. belt 10 with a spring-loaded roller, which is fixed to the axis VI by means of a lever.

On the connecting rod 12 with axial movement, a pin is fixed on the thread, which ensures the fixation of the spindle I from displacements (oscillations) by inserting it into the T-shaped groove of the pulley 11.

The machine tables have a working feed by means of pneumatic cylinders, an adjusting vertical movement by means of gears 15 and 16 and screw pairs 18 and 17, and an inclination around the horizontal axes VII and VIII with fixation of the required location of their working surfaces relative to the direction of spindle oscillations with nuts.

General layout of the SVPG drilling and grooving machine

All components of the machine are mounted on the bed, namely:

• on the upper plane - the spindle and the control panel;
• on the side beds are tables with clamps;
• inside the frame there is a niche for electrical equipment, an electric motor, a friction flywheel, two V-ribbed belt drives, a crank and rocker mechanism for driving the rotation and reciprocating movement of the spindle, as well as pneumatic control and locking equipment.

bed

The bed is cast, box-shaped, with windows for installation and maintenance of mechanisms and equipment located in it. The windows are closed with doors and covers. Inside the frame there is a niche for electrical equipment, two belt drives, a friction disk drive, a crank mechanism, a lever, an earring and a reservoir. A spindle and a control panel are mounted on the upper wall of the machine, and tables with clamps and chip collectors are mounted on the side walls.

Table (fig.6.4)

The table includes a bracket I fixed on the frame along the prismatic guides of which the slider 2 with the housing 3 fixed on it has a vertical movement. The movement of the slider is manual, by means of a gear 4, 5 and a screw 6, 7.

The sled 9 with the table 10 moves along the prismatic guides of the body 3 by means of the pneumatic cylinder 8. The connection of the sled 9 with the table 10 is made by axis II, which is parallel to the direction of its movement. Around the axis, the table has an adjusting movement of the location of its working surface relative to the direction of the spindle oscillations, fixed by the handle 12.

Parallel to the pneumatic cylinder 8 in the housing 3, a plunger hydraulic cylinder 13 is fixed, which provides (by throttling the oil displaced from it) the regulation of the working feed rate.

clamp

The clamp is a plunger pneumatic cylinder with a spring return, consisting of a body 1, a rod 2, a spring 3 and a pressure rubberized round heel 4.

The body 2 is fixed on a round rod 5, which is fixed by means of a split coupling 6 with a handle 7 on the table stand.

Tank

The tank is a container for oil, it includes a pipe 1 with two covers 2 and 3. The bottom cover has two holes for connecting oil lines, on the top cover there is an oil hole, which is closed with a plug 4 with a dipstick 5 for determining the oil level and built into it inlet check valve 6.

Spindle

The spindle includes a cast housing 1, in which a shaft 2 is mounted on two paired angular contact bearings with a spring tension of clearance selection, at the ends of which bores and external threads are made on both sides for fastening the cutting tool by means of collets and nuts 4. In the spindle housing, perpendicular to its axis, parallel holes are made, in which linear movement bearings 5 ​​are fixed for the implementation of spindle oscillations and one hole parallel to the spindle axis for connecting the earring of the oscillation drive mechanism.

Crank

The crank includes an axle 1, fixed in the frame, on which a pulley 2 with a T-slot is mounted by means of two deep groove ball bearings. In the T-shaped groove, the crank axle 3 is movably mounted, which has an installation movement with fixation by means of a screw gear 4. On the axis of the crank, by means of a radial bearing, a connecting rod 5 of the drive of the spindle oscillations is fixed with a pin 6 of fixing the spindle in the extreme position. Pin 6 is connected to the connecting rod by means of a thread, and fixation is carried out by inserting it into the T-shaped groove of pulley 2.

fencing

The guard includes body 1, guides 2 fixed on it and visors 3 and 5 mounted on the guides, spring 4, as well as stops 6 and 7. Visors 3 and 5 cover the cutting tool and are set to their original position by springs 4.

The initial position of the visors, depending on the overhang (length) of the tool, is regulated by stops 6 and 7.

Chip receiver

The chip receiver is a container, open from above, welded from sheet iron with a branch pipe for connecting exhaust ventilation. It is fixed on the table bracket under the cutting tool. There are two chip collectors on the bed - left and right.

Table of the drilling and grooving machine SVPG-2A. Rice. eight

Electrical equipment of the drilling and grooving machine SVPG

The electrical circuit of the drilling and grooving machine SVPG-2A

General information

The electrical equipment of the machine includes a two-speed electric motor with a squirrel-cage rotor: as a spindle drive and a swing mechanism.

The electrical equipment of the machine is designed to be powered by AC 380V, 50 Hz.

Electrical parameters of circuits:

• power circuit ~ 3; 380V; 50 Hz;
• control circuit ~ 220V, 50Hz;
• alarm circuit ~ 220V, 50Hz.

In the electronics of the machine are installed:

• panel with relay-starting protective electrical equipment;
• introductory circuit breaker with a remote control device with a lock;
• spindle drive motor rotation speed selection switch.

On the control panel are installed: signal lamps, control buttons for machine drives.

The wiring of power circuits and control circuits on the machine is made with PVZ wire. The choice and laying of the power cable for connecting the machine and the power supply network is carried out by the customer in accordance with the current value indicated on the plate on the machine (3x1 + Nx1 + PEx1).

Description of the operating mode of the drilling and grooving machine SVPG-2A

Supply, supply voltage is carried out by switch Q1, the presence of voltage in the machine is signaled by lamp H1.

The position of the switch handle SA1 gathers the winding circuit of a two-speed motor in YY or delta, which corresponds to a spindle speed of 12000 or 6000 rpm.

The control button SB2 turns on the starter K1 and the time relay K2. Starter K1 with its NO becomes a contact for "self-pickup", supplies voltage to the engine and its n.d. the contact turns on the signal lamp H2. Relay K2 closes its contact, thereby preparing the turn-on circuit for the dynamic braking unit. When you press the SВ1 button, it self-locks in the pressed position and breaks the power supply circuit of the K1 starter, the starter turns off and the engine is disconnected from the supply voltage, the H2 signal lamp turns off. At the same time, the contact of the starter K1 is closed and the starter K3 is turned on, which, with its linear contacts, connects the dynamic braking unit A1 to the phase voltage of the network - 220V.

The block is a half-wave rectifier on diodes V1 and V2. It ensures the flow of rectified direct current through the stator windings of the motor during positive half-cycles of the mains voltage. When the specified current flows, the motor creates a braking torque and provides braking and stopping of the spindle in no more than 6 s. At the end of the time delay of relay K2, its contact in the circuit opens and the braking unit is disconnected from the network.

Pneumohydraulic scheme of the SVPG drilling and grooving machine

Pneumohydraulic scheme of the drilling and grooving machine SVPG-2A

SVPG-2A Drilling and grooving machine. Video

Technical characteristics of the drilling and grooving machine SVPG-2A