Information about the manufacturer of the thickness planer SR-8
Manufacturer of thicknessing woodworking machine SR-8 is the Stavropol Machine Tool Plant Red Metalist, - which since 1932 has specialized in the production of woodworking machines. The plant was founded in 1902 and is located in the city of Stavropol.
SR-8 (SR 8-2) Single-sided thickness planer. Purpose, scope
Thicknessing machine CP 8-2 steel further development its predecessor surface planer CP 8-1.
Machines SR4-1 (400 mm), SR6-10 (630 mm), SR8-2 (800 mm) - a new, latest model range of thicknessing machines produced by the Krasny Metallist plant, which replaced model range surface planers CP3-6 (300 mm), CP6-9 (630 mm), CP8-1 (800 mm).
Thicknesser single-sided machine SR-8(CP 8-2) is intended for longitudinal, one-sided planing to a thickness of 5 to 250 mm of surfaces of flat workpieces up to 800 mm wide, made of coniferous and deciduous wood with a moisture content of no more than 15%. The SR-8 machine is a universal equipment and is used in serial and small-scale production of joinery products in the construction industry, furniture, shipbuilding, and carriage building.
Thicknessing machine CP-8 is used for flat planing (milling) of boards, beams or panels to size in thickness. It is used in enterprises and workshops for the production of joinery and construction products, laminated panels, furniture production, wooden housing construction and other woodworking industries.
Processing of workpieces is carried out by a 4-knife cylindrical shaft with wedge fastening of the knives in the shaft housing. A special clamp is installed in front of the knife shaft to support the wood fibers in the cutting area and eliminate chips on the surface being processed.
The table on which the workpieces are fed is of a cast rigid structure, equipped with support rollers to reduce friction when moving the material being processed.
The table is raised and lowered in height, depending on the thickness of the material being processed, mechanically using a separate electric motor or manually using a flywheel, followed by fixation to prevent spontaneous lowering of the table.
The bottom (base) surface of the workpiece must be machined to jointer. The deviation of the base plane of the workpiece should not exceed 0.15 mm over a length of 1000 mm.
The workpiece feed is mechanical. The feeder is driven by the engine through a gearbox.
The room where the machine is installed must meet the requirements of class P-IIa according to PUE-98.
Distinctive features of the thickness planer SR-8-2:
- The machine has a welded frame made of steel sheets, which greatly simplifies its design;
- The table is raised and lowered in height mechanically using a separate electric motor or manually, followed by fixation to prevent spontaneous lowering of the table;
- The machine has four drive rollers, which significantly improves the traction capacity of the feed mechanism. The workpiece feeding unit is also powered by a separate motor;
- The table is equipped with driven support rollers to increase the reliability of feeding when moving the workpiece;
- The feed speed can be selected discretely from 2 values on the machine console: 8 and 16 m/min;
- The front feed roller is sectional, which allows simultaneous processing of several workpieces with a difference in thickness of up to 4 mm;
- Processing of workpieces is carried out with a 4-knife cylindrical shaft with wedge fastening of the knives in the body;
- The machine is equipped with automatic braking device knife shaft for work safety;
- A special cast clamp is installed in front of the knife shaft to support wood fibers in the cutting area and eliminate chips on the surface being processed;
- Claw protection on the loading side, preventing reverse ejection of the workpiece during processing;
- Electrical locking, eliminating the possibility of turning on the machine when the fence is open.
SR-8 General view of the thickness planer
Photo thickness planer SR 8-2
Kinematic diagram and bearing arrangement of thickness planer SR-8
Kinematic diagram of thickness planer CP 8-2
The kinematic chains of the machine carry out the following movements:
- Knife shaft rotation
- Rotation of feed rollers
- Mechanical and manual movement of the table up and down
- Manual table clamp
Due to the simplicity of the kinematic scheme, its description is not given.
Location components machine SR-8-2. Rice. 3
Location of machine controls SR-8-2. Rice. 4
Location of machine controls SR-8-2. Rice. 5
Location of machine controls SR-8-2. Rice. 6
Location of components of thickness planer SR-8-2
- Sound-absorbing casing- Rice. 6 pos. 73 - SR8-2.01.00.010
- bed- Rice. 3 pos. 14 - SR8-2.01.10.000
- Table movement drive- Rice. 5 pos. 26, 28 - SR 6-10.01.060
- Table- Rice. 6 pos. 71 - SR8-2.01.12.000
- Front feed roller- Rice. 6 pos. 65 - SR8-2.01.13.000
- Clamps- Rice. 6 pos. 66, 67 - SR8-2.01.14.000
- Knife shaft- Rice. 6 pos. 72 - SR8-2.01.15.000
- Rear feed roller- Rice. 6 pos. 70 - SR8-2.01.15.010
- Feed drive- Rice. 5 pos. 24 - Wed 6-10.06.000
- Electrical equipment- Rice. 3 pos. 13 - SR8-2.01.80.000
Location of controls for thickness planer SR-8-2
- Stop button > general
- Knife shaft start button
- Feed drive start button
- Feed drive motor speed switch
- Light voltage indicator
- Up button for table movement
- Down button for table movement
- Lock alarm
- Mechanical table clamp handle
- Handle for moving table rollers
- Handwheel for manual table movement
- Stop button > general
- Locking device of the input machine
- Introductory machine
General layout of the CP-8 thickness planer. Description of the main assembly units
SR-8 machine bed
The frame 14 (see Fig. 3-6) of the machine is a rigid welded box.
Inside the frame, in the central niche of the front part of the machine, a feed drive 24 is installed (see Fig. 5). The knife shaft drive is located at the rear of the central niche of the frame.
The electric motor of the knife shaft (flange version) is attached to plate 25 (see Fig. 5), which moves along the grooves for tensioning the belts.
The machine's electrical cabinet and the table moving mechanism are located in the left niche of the frame. The right niche contains a chain drive for the feed drive and a V-belt drive for the knife shaft drive.
In the upper part of the frame the following are mounted: on detachable supports, a knife shaft with a rear roller; clamps, front roller with control panel and sound-absorbing casing. An exhaust funnel is attached to the rear of the sound-absorbing casing.
A locking device for the input machine is installed on the machine frame (see Fig. 4), consisting of a housing 20, a screw 21, a gasket 22, a strip 23. A special key 19 is attached to the locking device.
To lock the input machine, you need to use key 19 to release screw 21, release the bar 23 and move it to the right, placing it above the handle 18 of the input machine, then fix the bar by tightening the screw.
Table of thickness planer SR-8-2. Rice. 7
Table 1 is rectangular cast iron with guides 2, 3. The table contains two smooth drive rollers 4, 5.
The rollers are mounted on rolling bearings located in swinging brackets 6, 7. The height of the rollers is adjusted relative to work surface the table is produced by a lever-eccentric mechanism 8, turning the handle 9.
The table contains a tension mechanism 10 for the chain 11 that drives the table rollers. The chain is tensioned using a spring 12, which presses the sprocket 13 against the chain.
The table is fixed in a given position by turning handle 10 (see Fig. 3), through eccentrics 13 (see Fig. 7), screw 14, rod 15, guide 16.
Table movement mechanism (see Fig. 5)
The table movement mechanism consists of an electric motor 26, a V-belt drive 27, worm gear 28, chain transmission 29, movement screws.
Manual movement of the table is carried out by the handwheel 30, which must be pressed in the axial direction, engaging the pulley with the coupling half 32, and only then rotate the handwheel, moving the table, while the limit switch 33 will turn off the electric motor for mechanical movement of the table. After removing the axial load from the handwheel handle, spring 31 returns the coupling half and the flywheel to their original position.
Cutting mechanism and rear feed roller of thickness planer SR-8-2. Rice. 8
The cutting mechanism of the machine consists of a knife shaft and a knife shaft drive. The body of the knife shaft 1 (Fig. 8) is cylindrical in shape and has four grooves placed parallel to the shaft axis, in which straight knives 2 are installed.
The knives are fastened with 3 wedges and 4 screws. The knives are aligned with 5 screws and 6 nuts.
The knife shaft housing is mounted on ball bearings 7 placed in detachable supports 8, 9.
The knife shaft supports are attached to the bed.
The rotation of the knife shaft is carried out by an electric motor via a V-belt drive.
Knife sharpening. The durability of knives without sharpening is 3 - 4 hours of operation according to GOST 6567-76.
Properly sharpened knives should provide a roughness of the processed surface of no more than Kg 100 microns. If the surface roughness exceeds the specified value, the knives must be resharpened. In the process of repeated sharpening, the knives grind down. It is allowed to work with knives with a width of at least 20 mm.
Clamps of thickness planer SR-8-2. Rice. 9
The clamping elements of the machine include front and rear clamps. The front clamp serves to create support for the wood fibers at the point where the knife exits the material and prevent chipping.
The design of the front clamp is sectional. The pressing jaw of the front clamp consists of narrow sections 1. The pressure of each section is carried out by a spring 2 through a ball, which are located in a common axis 3. Each section of the clamp has the ability to swing on an axis 4. The sections are mounted with axes on two cheeks 5.
The rear clamp 6 is made in the form of a solid beam, mounted on two cheeks 7 and has the ability to rotate on the flanges of the knife shaft relative to its axis.
When processing wood workpieces, supporting rollers 4, 5 (see Fig. 7) of the table are installed above the working surface of the table by 0.1-0.4 mm. A lower value corresponds to the processing of hardwood workpieces, a larger value for the processing of softwood workpieces.
The height of the rollers relative to the working surface of the table is adjusted using handle 9.
Feeding mechanism of thickness planer SR-8
Front feed roller of thickness planer SR-8-2. Rice. 10
The feed mechanism of the machine is a four-roller, which consists of two upper and two lower feed rollers.
The upper feed rollers are assembled on separate supports and consist of a front grooved 65 (see Fig. 6) and a rear smooth 70 roller. The lower feed rollers are smooth and installed in the table.
The front feed roller 1 (see Fig. 10) in the CP 6-10 machine is solid grooved, and in the CP 8-2.01-section machine (Fig. 10a). It is mounted on two ball bearings 2, located in swinging brackets 5 and 6.
The rolling axes of the brackets are fixed in supports 3 and 4 through bushings 7 and 8.
At the customer's request, the CP 6-10 machine can be manufactured with a sectional corrugated shaft.
Front feed roller of thickness planer SR-8-2. Rice. 10a
On shaft 2 (Fig. 10a) there are longitudinal slots-grooves in which thrust strips of sectional rings 1 are placed. Ring 1 is centered relative to the axis of shaft 2 by rubber bushings 7.
The roller is pressed against the workpiece using a spring through rods.
Front feed roller of thickness planer SR-8-2. Rice. 11
Claw protection 11 is installed in front of the feed roller (see Fig. 11). The claw protection is raised by turning axis 9.
Spring 10 returns the claw guard to its working position.
The front feed roller assembly includes a machine control panel, into which an axis with sound-absorbing elements in the form of separate 12 strips is inserted.
The rear feed roller 10 (see Fig. 8) is made smooth, mounted on ball bearings 11 located in swinging brackets 12, 13. The swing axes 14 of the brackets are attached to detachable supports 8, 9 together with the knife shaft housing. The roller is pressed against the workpiece by springs.
Feed drive of thickness planer SR-8-2. Rice. 12
Feed drive (see Fig. 12)
The feed drive consists of a motor 1, a coupling 2 and a gearbox 3, mounted on a plate 4.
Setting the required feed speed is done by turning the switch on the machine control panel to the desired speed.
Machine accessories
The machine is supplied with:
Set of tools and accessories (keys, screwdriver, rod syringe) and accessories
Control device for setting the cutting edges of knives
Control device for thickness planer SR-8. Rice. 13
Retainer
The device is designed to lock the knife shaft when changing knives (see Fig. 14). The device consists of a body 1, a screw 2, a rod 3, a spring 4. The knives are changed only when the knife shaft is fixed. To do this, the device is installed on the right cheek of the front clamp and secured with screw 2. After securing the clamp on the cheek of the clamp, carefully turning the blade shaft, lower the stopper 4 of the clamp into one of the four grooves of the blade shaft. The knives are changed sequentially with the knife shaft fixed.
After changing knives, the lock must be removed from the machine.
Sharpening device
A sharpening device is used to sharpen knives mounted on the knife shaft of the machine. For all questions regarding its use and operation, please refer to the sharpener's operating instructions.
The control device is designed to set the cutting edges of knives relative to the axis of rotation of the knife shaft to a cutting diameter of 128 ± 0.05 mm.
The device consists of a body (1), a dial indicator (2) and a tip (3).
When installing the device on the knife shaft body, the tip comes into contact with the knife blade. The difference in indicator readings at the extreme points should not exceed 0.05 mm.
Electrical equipment of the single-sided thickness planer SR-8
Electrical circuit diagram of thickness planer SR 6-10 and SR8-2.01 Fig. 15
Electrical equipment of the CP 6 machine Fig. 15 contains:
- M1 - asynchronous electric motor With squirrel cage rotor- knife shaft drive;
- M2- asynchronous two-speed electric motor with squirrel-cage rotor - feed drive;
- MOH- asynchronous electric motor with a squirrel-cage rotor - table movement drive;
- Limit switches- controlling the position of the side doors, the exhaust funnel and the extreme positions of the table;
- Remote controller- starting and protective equipment located on the console and in the niche of the frame.
The following voltage values are used on the machine:
- power circuit 50 Hz, 380 V;
- control circuit 50 Hz, 110 V;
- signaling circuit 50 Hz, 24 V.
This manual provides (see Table 6):
The control panel is located in the upper part of the machine facing, and the electrical cabinet is located in the niche of the frame.
To turn on the machine, an input switch Q1 is installed in the electrical cabinet, the drive of which is routed outside.
The hole for entering the power wires is located at the bottom, on the side wall of the electrical cabinet.
The input must be made with a PVZ brand wire with a cross section of 2.5 mm², black for power circuits and green-yellow for grounding, for CP8-2.01. – cross-section 4 mm².
Description of the operation of the electrical circuit (see Fig. 16)
Before turning on the machine, it is necessary to open the electrical cabinet door and check the status of switches Q1 and Q2, and then close the electrical cabinet door.
By turning on the input switch Q1, power is supplied to the power, control and alarm circuits. The H1 warning light on the control panel should light up.
The cutter shaft drive is turned on by button S6, and the magnetic starter K3 is turned on, closing its contacts in the power supply circuit of the cutter shaft motor M1.
The feed drive is activated by the S8 button located on the control panel when the knife shaft drive is turned on. In this case, the magnetic starter K6 is turned on, closing its contacts in the power supply circuit of the electric motor M2.
When the knife shaft and feed drive are turned on, the corresponding signal lamps NC, H4 and H5 light up on the control panel.
Schematic diagram The machine has 2 feed speeds.
The feed speed is changed by switch 59, by switching the speeds of the two-speed electric motor M2.
The electric motors M1 and M2 are turned off by pressing buttons 51, located on the control panel, or 52, located in the right niche of the rear part of the machine.
To stop the knife shaft drive, use electrodynamic braking, the intensity of braking is set by the adjusting resistor of the control unit, and the braking time should not exceed 15 s (regulated by the pneumatic attachment of the starter K4).
To regulate the electrodynamic braking unit of the knife shaft drive, you must:
- set the time delay of the pneumatic attachment of the K4 starter equal to 15 s;
- set the variable resistor slider of control unit A to the middle position;
To increase the intensity of braking, turn the resistor slider clockwise, to decrease it - counterclockwise.
Let's consider the operation of the circuit during electrodynamic braking of the M1 blade shaft drive. When the knife shaft drive is turned off using buttons S1 or S2, starter K3 is turned off and contact (16, 17) turns on starter K5.
Starter K5 closes its contacts in the power circuit of electrodynamic braking, supplying power to braking unit A, contact (2, 16) of the pneumatic attachment of starter K4 opens after t = 15 s, sufficient to completely stop the knife shaft drive.
The adjustment is considered to be completed correctly if, when you press one of the “General stop” buttons, the electric motor of the blade shaft drive rotates for 15 seconds, and immediately after the electric motor has completely stopped, the brake contactor is switched off.
M3 table movement drive is turned on when the knife shaft drive is turned off in jog mode using buttons S11 and S13 located on the control panel. The table travel is limited by limit switches S10 and S12.
In accordance with the technical characteristics, the AIR series electric motors installed on the machine allow no more than 10 on-off cycles per hour.
From a cold state, the electric motor can be turned on and off with electrodynamic braking and immediately repeat the on-off cycle. Subsequent on-off cycles can be repeated with an interval of at least 5-6 minutes, but no more than 10 cycles per hour.
SR-8 Thicknessing woodworking machine. Video
Technical characteristics of thickness planer SR-8
| Parameter name | SR-6-9 | SR-6-10 | SR-8-2 |
|---|---|---|---|
| Basic parameters | |||
| Maximum planing width, mm | 630 | 630 | 800 |
| Thickness range of processed workpieces, mm | 5..200 | 5..250 | 5..250 |
| Mechanical feed speed of workpiece, m/min | 8-24 | 8; 16 | 8; 16 |
| Minimum length of workpiece processed, mm | 400 | 450 | 450 |
| Maximum thickness of layer removed in one pass, mm | 5 | 8 | 8 |
| Planer shaft rotation speed (idling), rpm. | 4570 | 4570 | 4570 |
| Number of planing knives on the planing shaft | 4 | 4 | 4 |
| Planing shaft diameter, mm | 125 | 128 | 128 |
| Knife size: Length, width, thickness, mm | |||
| Thicknessing table length, mm | |||
| Nominal diameter of the exhaust funnel connecting pipe, mm | 180 | ||
| Maximum difference in thickness of simultaneously supplied material, mm | 4 | 4 | |
| Electrical equipment of the machine | |||
| Type of supply current | 380V 50Hz | 380V 50Hz | 380V 50Hz |
| Number of electric motors on the machine, pcs. | 1 | 3 | 3 |
| Knife shaft drive electric motor, kW | 7,5 | 5,5 | 11,0 |
| Feed drive electric motor, kW | 1,1 | 1/ 1,7 | 1/ 1,7 |
| Electric motor for table movement drive, kW | - | 0,37 | 0,37 |
| The total power of all electric machine engines, kW | 8,6 | 13,07 | |
| Dimensions and weight of the machine | |||
| Machine dimensions (length x width x height), mm | 1130 x 1360 x 1260 | 1120 x 1315 x 1340 | 1120 x 1480 x 1340 |
| Machine weight, kg | 1680 | 1440 | 1600 |
Designed for planar planing of boards, bars, panels to a given size in thickness.
Thickness woodworking machine CP8-2 has a trace. design features:
The rigid frame dampens vibration well and is covered on top with a sound-absorbing casing with an exhaust funnel.
The following components and mechanisms are installed on the frame:
- Four-knife shaft driven by an electric motor through a V-belt drive;
- Feed mechanism with chain drive from a separate electric motor for 2 upper and 2 lower feed rollers. The front upper roller is grooved, the rear one is smooth (on request, the front roller can be made sectional, which will allow processing several workpieces varying in thickness up to 4 mm). Feed speeds of 8 and 16 m/min are provided by a two-speed electric motor, switched by a toggle switch;
- The cast-iron box-shaped table has a manual movement mechanism driven by a flywheel, a mechanical movement mechanism driven by an electric motor and a table locking mechanism. The table is equipped with guides and two smooth feed drive rollers. To eliminate the effect of “trimming” the edges of the workpiece, the rollers are made adjustable in height;
- Claw protection that prevents the ejection of the workpiece is installed in front of the feed rollers;
- Clamping elements ensuring high-quality processing of materials. To prevent chipping of the wood, a front clamp is installed at the point where the knife exits to support the fibers (the clamp is made in sections, each section is spring-loaded). The rear clamp, made in the form of a beam, has the ability to swing around the horizontal one.
Thickness woodworking machine CP8-2
has a trace. technical specifications:
| General technical data | |
| Dimensions of the workpiece, mm: |
|
| - width | |
| - thickness | |
| - length not less | |
| Maximum thickness of the removed layer, mm | |
| Number of knives, pcs. | |
| Knife shaft diameter, mm | |
| Feed speed, m/min (stepped) | |
| Table movement, m/min | |
| Required amount of air for chip removal, m3/hour | |
| Shaft rotation speed, rpm | |
| Total power of electric motors, kW | |
| Dimensions, mm | |
The production and design of the CP6-6 thickness planer was carried out by the Stavropol plant "Krasny Metallist". This type of equipment is designed for processing flat wooden pieces to thickness dimensions. Despite the outdated design, the equipment is still successfully used in small production lines.
Design and operating principle of the machine
The main feature of the CP6-6 thickness planer is its stable cast iron body. It makes it possible to process workpieces relatively large sizes without reducing quality. Additionally, the design includes components and functions that increase productivity.
Structurally, the CP6-6 installation consists of a cast-iron frame in which the work table, feed mechanisms and knife shaft are located. For precise processing, the equipment circuit includes a unit for moving the table in the vertical direction. This is done using a special device and an electric motor.
Operating principle of thickness planer CP6-6.
- Selecting the thickness of the workpiece being processed, setting the parameters for removing chips in one pass of the cutting shafts.
- Placement of the workpiece between two feed rollers located at the top and bottom.
- First, rings that have a corrugated surface and rubber seals are installed on the sectional shaft. This makes it possible to simultaneously form different thicknesses on wooden surface details.
- The pressure applied to the cutting shaft is ensured using a special cap. It has the function of regulating the degree of mechanical impact.
- Simultaneously with the pressing function, the sharp edge of the cap removes chips from the surface, which has a positive effect on the quality of processing.
To prevent the backward movement of the timber, “claws” are mounted in front of the feed folds, which prevent the workpiece from changing direction. This is a prerequisite for operating the machine when processing thin materials.
To increase the versatility of the CP6-6 thickness planer, its design includes devices for sharpening and jointing of processing knives. This allows you to perform preventive measures without the use of additional equipment.
Specifications
To get acquainted with the actual parameters of the machine, it is recommended to study technical passport equipment. It describes in detail not only technical specifications, but also the performance of the installation.
Relatively small dimensions (110*138*156 cm) make it possible to install the unit in a convenient location in the production workshop. Pre-prepared flat surface, since the design does not provide regulatory mechanisms. It is best to purchase and install support feet. With their help, you can not only set the level correctly, but also partially compensate for the fluctuations of CP6-6 that occur during operation.
In addition, you should know the following technical characteristics of the surface planer model CP6-6:
- the maximum permissible width of the workpiece cannot exceed 63 cm;
- thickness can vary from 5 to 200 mm;
- the length of the wooden product is limited to 36 cm;
- the maximum thickness of the removed layer is 5 mm;
- the design of the processing drum has 4 knives;
- shaft diameter is 128 mm;
- options for feeding workpieces, m/min – 8, 12, 20 and 30;
- cutting speed is 33.5 m/min;
- The mechanical table is shifted at a speed of 0.565 m/min.
The main movement of the surface planer CP6-6 is carried out due to the operation of an 8.6 kW electric motor. In this case, the shaft rotation speed is 5000 rpm.
The design includes a system for removing chips and wood dust. For normal operation of the equipment, the air exchange must be at least 1800 m³/hour. In this way, it is possible to avoid clogging of equipment components and prevent the appearance of defects on the surface of the workpiece.
Operating rules
Familiarization with safety precautions when working on the machine is mandatory. To do this, you need to study the instructions, master the methodology and principle of operation of the equipment. You can familiarize yourself with this data by reading the surface planer passport.
The connection is made through the grounding unit located at the bottom of the structure. In addition to the power supply, you need an exhaust device that will remove wood dust and shavings from the processing area wooden products. It is connected through the corresponding pipe.
Before starting work, make sure that the doors are electrical cabinets closed. The design provides automatic shutdown if they are open.
After installing the workpiece, the fixed knives are lowered. In this case, their edges should be 2 mm below the plane of the workpiece.
The minimum length of processed wooden products cannot be less than 400 mm. At the same time, it is taken into account that the difference in thickness should not be more than 4 mm. Otherwise, runout will occur, which will lead to poor processing.
The video shows an example of modernizing a similar model of a thickness planer:
