Some standard content:
GB189562003
In this standard, the third part, 5.2.4.1, 5.2.6.1.1b), 3.2.6.1.13.5.2.6.1.2, Table 3, 5.2.7.1.1), 5.2.7.1.1.1.5.3.3 Note, the items indicated in 6.3 are recommended, and the appendix A and the appendix are recommended. The rest are general. This standard is developed in accordance with the new European standard EN861:1997 Safety of machine tools for horizontal and horizontal dual-purpose woodworking machines. The technical content of the standard is consistent with EN1, and the limit value of the sound pressure level of the machine tool idling sound is added. The appendix B, appendix C and appendix E of this standard are normative appendices, and the appendix A and C of this standard are informative appendices. This standard was proposed by the China Machinery Industry Federation. This standard was drafted by the National Woodworking Machine Tool and Other Standardization Technical Committee. This standard was also drafted by the State Woodworking Machine Tool Research Institute. The drafters of this standard were Zheng Jing and Zheng Qin.
This standard was first published on August 1, 2003. 1 Scope
Woodworking Machine Tool Specification
Flatbed Planer
This standard specifies the safety technical requirements and inspection methods for flatbed planer (hereinafter referred to as machine tool). The technical standard is applicable to machine tools produced after the implementation date of this standard. 2 Normative references
GB18956—2003
The following documents and their clauses become the references of this standard through reference in this standard. For references with a date, all subsequent revisions (excluding errata) or revised versions are not applicable to this standard. However, the latest versions of these documents may be used by the parties that reach an agreement based on this standard: For references without a date, their latest versions are applicable to this standard. GB/T699--1999 High-quality carbon structural steel
CH/15225.1—1996 Industrial machinery and electrical equipment Part 1: General technical conditions GB/T9239-1988 Permissible non-uniformity of rated quality Determination of balance GR12557-2000 Safety general principles for machine tools GB/T4386-1993 GB/T15706.1-1995 Safety of machinery - General concepts and design principles - Part 1: Basic principles and methodology GH/T13703.2-1995 Safety of machinery - General concepts and design principles - Part 3: Technical principles and specifications GB/T15377-1994 Woodworking machine tool terminology Woodworking planer B/T153W-1994 Woodworking machine tool terminology Basic terminology GH16754-1997: Mechanical safety emergency stop design principles GB/T1S755-1997 Mechanical safety Drafting and expression rules for safety standards H/T118831-2 002 Design and selection of interlocking devices for mechanical safety belt guards GB189552UU3 Safety of woodworking tools and saw blades J/T3377-1992 Straight-edged blades for woodworking machines JB33801SS9 Safety of semi-cutting machines
JB5727-1555 Safety of single-sided woodworking planers JB/T9953-199S Method for measuring noise and sound pressure level of woodworking machines 3 Terms and definitions
The following terms and definitions apply to this standard.
Flat-type and flat-type woodworking planers are combined machine tools for processing planes and workpieces through horizontal rotation. When flat-type: The workpiece passes through the upper well of the cutter body and the lower well, and the front workbench of the flat part can be adjusted. When pressing, the workpiece is placed on the adjustable pressing workbench, and the workpiece passes through the lower well of the cutter body and the upper well is processed. 3.2
Machining workbench hicknrssingibk
The planer workbench consists of a fixed or movable machine tool component that supports the workpiece of the machine tool 1
GB18956-2003
cntterbkck
See GB/T153771994 4.1.3
cuerblock (in)
Cutter shaft
See G/T1:377-1994 4. 1.4 The axis is also used as a tool. 3.5 Manual feed See 3.3 of GB 12557-2000. Demountable power feed unit See 3, 4 of CB 12557-2000. Inner gear feed See 3.5 of GB 12557-2000.
Loading the machine
See 3.6 in GB 12557—2000.
Potential shot
See 3.10 in G812557—000
Rebound
See 12557—20003.11.
ganti-kickhuck finpers
Backstop
GB/T 15379
1994 6. 7.2. 2.
Starting time
rwr-optime
See 3.13 in 12557—2000
Running time
ran-duwm Ume
See 3.11 in 12357—2000.
Operator position
operator positionlon
The position in which the machine operator stands. 3.15
Confirmation
See 3.15 in 125572000
For common terms, see GB/T15877-194GB/T13370-1S944 Hazard calculation table
This hazard list covers all hazards of machine tools. Serial number
E18956—2003
For important risks, the safety assessment fee or measures will be sought through the appropriate white label, or for unimportant risks, such as general, minor or secondary risks, it will be difficult to pass the appropriate A label, especially GB/T15706.1~15706.2—1995. These risks are calculated in accordance with Table 1 proposed in GB/T16755—1997
Machine cut-off exemption from insurance, add the following if the machine group parts or the work performance are caused: shadow,
will be relatively heavy,
surface quality and rapid qualitative "inspection of each part"! Phase velocity of the breaking quantity (kinetic energy of the parts to be discarded)
Functional strength is not Ni
Energy accumulation caused by the following reasons;
Elasticity zero (mouse) formed body or gas under pressure, fighting danger
Shear average danger
Uniform danger
And new danger
Inducing or frightening danger
Impact danger
Measurement or tooth energy danger
Friction danger
High-pressure body radiation low risk
(Bottle combustion drum processing sample or workpiece) Component extraction danger (muscle recovery or machine tool parts) Unstable
Related to the machine core, period, European reading danger cell electrical limit error as follows to each plan
Electric exchange (technical or indirect)
Sleeping electric current you|| tt||The following are the hazards caused by the following: tt||The hazards caused by the external influence of electrical equipment, such as the spray of the whole, the chemical reaction caused by the torque, etc., the fire or explosion caused by the internal fire and the heat radiation caused by the working environment, the injury and loss of hearing due to the influence of the working environment or the cold environment, the danger caused by the noise, the risk of hearing loss, etc., the risk caused by the vibration, the risk caused by the insertion radiation, especially: the machine used for processing by the high-frequency radiation source of the European Light Industry, the acceptance of this standard, this standard is not suitable for this standard, this standard is not suitable for this standard, 5.2.3, 5.2.5
Not suitable
Not suitable
Not in compliance
Not suitable
Not suitable
Not suitable
Not suitable
Not suitable
Not suitable
GB18956—2003
Change 1 (Continued)
Preliminary processing, the results of the separation of materials and substances from the standard risk, such as: due to the contact with the drum change harmful to the body, gas, mist and dust effect of the danger of explosion test
biological and microbiological (tourism or test code) risk in the design of ergonomics (analysis of silver and human characteristics and whether it can match), test: 1 adverse to the health of the child due to excessive force
inappropriate consideration or human hand/hand bone to welcome/fat to create a quick neglect of personal protection beauty
inappropriate work title
please pay attention to excessive tension work limit insufficient preparations, etc.
human sexual hunting
various dangerous obstacles
due to energy changes, mechanical parts of the situation bad sense other kinetic energy respect range risk, for example, energy planning quantity change city road
machine health parts or flow discharge accident external radiation || tt||Control system failure, malfunction (external movement, over-external caution) equipment with process
Machine condition display, unexpected machine quality
Hazards caused by the protection of the system (timely suspension) or protection measures engineer pull storage error limit·screen, such as various auxiliary protection devices
All kinds of safety-related (shutdown) devices
Starting and stopping devices
Safety signal and evaluation device
All kinds of Type of signal and alarm device
Oxygen cut-off setting
Inadvertent stop loading quantity
Allowed feeding/minimum loading quantity
Anti-measurement and/or wide connection of main bean and accessory gas delivery equipment
Safety requirements and/or mitigation measures
Combination rate standard cycle
Not suitable
Not suitable
5, 1, 7
5, 1. 1.E, 1. 6Www.bzxZ.net
6. 2.545.2.7
Not suitable
Not suitable
In addition to complying with the provisions of this standard, the safety of machine tools shall also comply with the provisions of GB12557CB/T15706.1~15706.1-1S95
Related instructions for reducing risks by design According to G/T1579G.2-1925 Chapter 1: 5.1 Control and command devices
5.1.1 Safety and reliability of control systems For the purpose of this standard, the relevant safety control system includes the initial actuator or position sensor to the final transmission port, such as the motor system. The relevant safety control components of this machine tool include: starter (see 5.1. 331
Normal stop (see 5.1.4):
---Emergency stop (see 5.1.5);
Link caution circuit (if necessary, see 5.2.7.2); Unlock the link (see 5.2.7.2 and 5.2.7.3) * brake (if necessary. See 5.2.43
818956-2003
Sufficient input interruption protection when the external start-up (see GB/T15706.2-1995 3.7.2 and 5.1.7 of the standard) Requirement).
These controls should be designed and controlled at least according to verified components and principles. For the purpose of this standard, verified components and principles refer to, 8) Electrical components should comply with the relevant national standards and industry standards, especially the following components: control switches with forced cut-off (used as position sensors for machine resistance operation in interlocking protective devices and sensors for auxiliary circuits):
Resistant insulation wires:
PVC wires with anti-damage protection should be added through wiring (for example, inside the machine bed). h) In the original electrical drawing, whether it complies with the 4 preceding 9.4.2.1 of GB/T5326.1-1996. Regulations for electronic components: This principle is not adopted:
Whether the machine parts meet the requirements of 3.5 in GB/T1576.21995:) Whether the machine operation switches with protective devices are forced to operate, and whether their arrangement and connection as well as the design and connection meet the requirements of 5.2.2 and E.2.3 in GR/T1AR.1-2002; e) Chain devices with protective locks must at least meet the requirements of the four-state chain structure in GB/T18831--2002: Inspection method: Check the corresponding drawings and/or circuit diagrams, inspect on the machine tool, and provide proof of compliance with the corresponding standards. 5. 1.2 The main electrical connections for machine start, normal stop, working mode selection (if provided), emergency stop and table height adjustment (if powered by motor) shall be: When equipped with a working mode selection device, at least: a start control and a stop control in the planing operating position, a reset table motorized lift controller (if motor drive is provided) and a stop controller in the press loading position. When there is no working mode selection device, at least: a starter and a stop controller in the planing operator position; a starter and a stop controller and a self-resetting table motorized lift control unit (if motor drive is provided) in the press operator position. Note that if the machine tool is very small, the planing and The operation position of the press can be in the same position. The position of the controller,
in the press operation position refers to,
the workpiece input end of the press workbench, at a height of not less than 600mm from the ground, below the planer workbench (the flat workbench is generally at least 50m above the ground);
the position of the vertical operation panel:
its upper surface is generally not higher than 170m above the ground; its front is not more than 600mm from the edge of the workbench at the workpiece input end of the press, and the front should not extend beyond the edge of the workbench on the side of the operator. Inspection method: check the corresponding drawings, measure and inspect on the machine tool, 5
GB18956—2003
According to 9.2.5.2. of GB/T$226.1199S, the following requirements are added; for this standard, "safety protection devices are in place and functioning" is achieved through the joint arrangements specified in 5.2.7.1, 5.2.7.2 and 5.2.7.8, and "operation" means the ability of the cutter shaft to rotate and/or move (such as by adjusting the supply). When all the movable joint safety protection devices specified in 5.2.7.1 are in place and functioning, the drive motor of the cutter shaft can be started; for machine tools with detachable motorized supply devices in their structures, the drive motor can only be started when the cutter shaft motor is started.
When the safety protection devices specified in 5.2.7.2 are in place and functioning, and the drive motor of the cutter shaft is The feed motor can only start when the motor is running at a predetermined speed. On a machine with only one motor, the feed can only start when the shaft is connected. The starting must be achieved through the structure of the corresponding control circuit. If a relay is used, the delay is at least equal to the trip time. The relay must be fixed or its adjustment device must be sealed. If the height adjustment of the press table is driven by an electric motor, its adjustment control device must be self-resetting. Different from this, on a machine with electronic pre-programming, there are protective devices on the front and rear feed openings (such as fixed protective devices, protective devices with automatic stop devices) or emergency devices: and the rise of the table shall not exceed 20mm/s. A program start command device can be used to control the adjustment of the table. Test method, check the corresponding drawings and/or electric pedals and letters, and perform functional tests on the machine tool: 5.1.4 Positive belt stop
should be in accordance with the provisions of 5.2.5 of GH1255-2000, and all power machines in the industry should be equipped with a normal stop positive control device. Normal stop should be
a) Class 1 according to 9.2.2 of GB5226.1-1996. Applicable to machines equipped with electric brakes or 6) Class U according to 9.2.2 of (5226.1-1996.It is not used in other situations. For the first type of stop, the stop command should be: if the feeding mechanism of the machine tool is driven by a separate electric drive, the energy to the mechanical feed mechanism is cut off! If the plug is used as a connection for a detachable motorized feed device, the power of a head is cut off: the power and operating brake of the drive motor of the cutter shaft are cut off; if the electrical brake is cut off, the shaft stops rotating, for example, by releasing the interlock of the protective device after a time maintenance of the electric energy to stop the shaft rotation; cut off the power of each operating part of the machine tool: in the machine tool with a pre-programmed power supply: a second type of stop command device specified in 2.2 of GB5226.11996 must be provided.
If the first stop test rate is less than the normal stop requirement, it can be considered that the normal stop requirement is implemented: the cut-off sequence of the normal stop must be realized by the corresponding control circuit structure. If a time relay is used, the delay shall be at least as long as the braking time. The delay device should be set as soon as possible, or its whole device should be close to the time. According to the test method, check the corresponding sample and/or circuit diagram. Observe and perform functional tests on the machine tool. 5.1.5 Emergency stop
There must be an emergency stop operator accessible from the operator's working position on the machine tool's forward feed. For machines with a feed motor/variable feed height of 500mm, the emergency stop with a mechanical brake is required to be installed at a place accessible to the feed position.
The machine tool emergency stop control system with a mechanical brake shall comply with the provisions of 9.2.5 of GB5226.1-1996 and the provisions of GB16754-1997. The emergency stop control system of machines with pneumatic brakes shall comply with 9.2.2 of GB5226.1-1996 and the provisions of GB16754-1997-11, and shall comply with the functions and requirements of 5.5.2.4 of GR5226.1-1996. The start-stop sequence is the same as the normal stop (see 5.1.4). The emergency stop requirement must be achieved through the corresponding control circuit. If a time chain device is used, the delay should be at least the same as the shortest start time. The delay device should be fixed, or its adjustment device should be sealed. 6
Control method; check the corresponding samples and/or circuits and diagrams, perform functional tests on the machine tool, 5.1.6 Selection of working mode
There are two positions of the working mode selection switch and the following operations should be performed: GB18956—2003
The planing working mode of the machine tool can only be started when the protective device (defined in 5.2.7.1) is in place and works (see 6.1.3). Check the corresponding samples and/or circuits and diagrams, perform functional tests on the machine tool, 5.1.6 Selection of working mode
There are two positions of the working mode selection switch and the following operations should be performed: GB18956—2003
The planing working mode of the machine tool can only be started when the protective device (defined in 5.2.7.1) is in place and works (see 6.1.3). 51.7 Failure of control circuit
For electrically driven machine tools, in the event of power interruption, after the power supply voltage is restored, the automatic restart protection shall comply with the requirements of paragraph 1 and paragraph 2 of 7.5 of GB/T5226.61996. Inspection method: Check the corresponding drawings and/or circuit diagrams, inspect on the machine tool and perform functional tests. 5 1.8 Failure of control circuit
See 5.1.1.
5.2 Protection measures against mechanical hazards
5.2.1 Stability
The structure of the machine tool should be equipped with a device to fix it to the ground, platform or other fixed structure, such as holes in the machine tool base. Inspection method: Check the corresponding drawings and inspect. 5.2.2 Risks of operation interruption
When working on the platform, follow the requirements of 5.2.3.1. The requirements for tools shall be in accordance with the provisions of 5.2.3, and the requirements for protective devices shall be in accordance with 5.2.8. 5.2.3 Special structure of tool holder and tool
The tool shaft of the machine tool must be a matching two-hanging structure. The general requirements for assembled tools for manual feed and mechanical feed machine tools can be found in the corresponding requirements of GB1865-2308. Additional requirements and more detailed requirements shall be in accordance with Appendix B of this standard: check the corresponding drawings.
5.2.4 Braking
5.2.4.1-Term requirements
When the unbraked motion time exceeds 10, it is recommended to set an automatic brake. The braking time using the brake should be:
less than 105, and
less than 109 at the time of starting. The time before starting should not exceed 30. Test method: For the determination of the unbraked running time, starting time and braking time, see the corresponding test below. 5.2.4.2 The test set
The main drawer is adjusted according to the manufacturer's specifications (tension of the belt) Before the test, the machine tool should be idle for at least 15 minutes to allow the knife shaft assembly to warm up. Prove that the actual speed of the knife shaft is within 1% of the rated speed. When testing a machine with a manual star-delta starter, the machine tool manufacturer's instructions for starting should be read. The accuracy of the speed meter is only 1% of the reading. 19.
52.4.3 Test
5.2.4.3.1 Inertia time without brake The inertia time without brake is measured as follows: 1) Cut off the power of the driving motor of the spindle and measure the inertia time without brake; 2) or restart the spindle and make it reach the stop speed. Repeat steps b and c twice. The inertia time without brake of the machine tool is the average value of the above three measurements. 7
GB 18956—2003
5.2.4.3.2 Starting time
The starting time is measured as follows:
E) Cut off the power of the driving motor and make the spindle come to a complete stop; 11) Restart the spindle and measure its starting time; c) Repeat step b) twice. The starting time is the average value of the above three measurements. 5.2.4.3.3 Braking time
The braking time shall be measured as follows:
a) Stop the spindle drive motor and measure the braking time;
b) Stop the spindle for 1 min
Restart the spindle and idle for 1 min
Repeat steps a and c> 9 times:
The average of these measurements is the braking time of the machine tool. 5.2.4.4 Braking time
Where a controller is provided to release the main draw brake for turning and adjusting the tool, the brake shall be released only when the spindle has stopped running. For example, by using a delay medium between the control operation and the brake release. Test method: Check the corresponding drawings and carry out a functional test on the machine tool. 5.2.4.5 Types of braking devices
For machine tools that use only a single switch to start, stop and act as a master switch, it is recommended to set a dynamic mechanical brake. When an automatic electric brake is used, the main switch should not be located on the same side of the start and stop controls of the machine tool or the lifting console.
When the reverse current is applied, the tool shaft will not rotate in the opposite direction when it stops. Check the force method, check the corresponding samples, and perform functional tests on the machine tool. 5.2.5 Devices to minimize the possibility and influence of the rebound 5.2.5. 1 Anti-return capacity
The machine tool should be equipped with a finger-shaped anti-return device and adopt a closed structure. It must be sufficient over the entire working width of the machine tool and should pass the test of Appendix D of this standard.
If the anti-return device is installed on the shaft. F+The minimum diameter of the purchased shaft meets one of the following conditions! 》Meet the requirements of the figure!
b) After the rebound test in the appendix, there is no permanent deformation. The design, manufacturing and installation of the anti-return device shall meet the following requirements: a) The anti-return device must be installed in front of the forward yoke of the workpiece input. The impact resistance of the head of the anti-return melon should reach 15J/cm2, and the surface roughness should reach 100HB; b) For machine tools with a maximum width of 200mm or more: the working width of the anti-return claw must be 8mm-15mm. For machine tools with a processing width less than 260mm, it must be 3mm-8mm. The radius of the claw exceeds 0.2mm. The angle and the angle of the triangle in each position should be the same as the values in Figure 2; the total movement of the anti-return on the side shall not exceed 1% of the maximum processing width of the base. For the anti-return melon installed on the shaft, the gap between the shell and the claw shall be Other fixing forces must be used between the upper and half of the width of the claw, and the total distance must not exceed half of the width of the claw; f) The anti-return claw must be in the state of falling from the action to the static position, and there should be only a stopper that stops the entire rotation of the anti-return axis (except for the angle fan-shaped area corresponding to the minimum and maximum cutting depth of the machine tool); g) The top of the anti-return melon should be at least 2m lower than the horizontal tangent line of the cutter axis cutting circle at the static position h) The fixing device without the anti-return claw is not allowed: cod/ou
The anti-return claw is small and light
National 2 anti-return device
Inspection method: Check the corresponding drawings and/or circuits and diagrams, observe and perform functional tests on the machine tool: 5.2.6 Support and guidance of workpieces
GR18956—2003
For machine tools that carry out flat workpiece processing after being transferred or moved, after the conversion from flat workpiece processing to press workpiece processing (also in the area of burning), the work positioning should be based on the weight (for flat workpiece processing and press workpiece processing). The handling structure of the workbench shall comply with the provisions of GB12557—205.4.5.2.
The conversion from flat workpiece processing to planing workpiece processing (and vice versa) can be completed without dismantling or using tools (such as sheet metal workpieces). Inspection method: Check the pre-production drawings and/or circuit diagrams, observe the design and perform functional tests on the machine tool. 5.2.6.1 Requirements for flat workbench
5.2. 6.1.1 Requirements for workpieces
) For machines that perform machining on the tool axis, the operating instructions must state the following safe working methods: The lower limit of the adjustment range of the rear worktable of this machine tool is 1 mm below the front cutting position.)
Machine tools with a cutting depth exceeding 1 mm should be equipped with a front worktable vertical adjustment device: d>
The flatness of the front and rear worktables should comply with the provisions of GP/T14386. For machines equipped with a front worktable vertical adjustment device, the parallelism with the rear worktable interface should be maintained throughout the adjustment range. The requirements of GB/T14386 are followed. The adjustment range is limited to cut without roughness. Over 8mm (except for machine tools with ports): GB18956-2003
The workbench shall be made of light alloy or cast steel, and its tensile strength shall not be less than 200N/mm: 1) The work partition plates (made into parts that are integral with the workbench or detachable) shall be made of steel, light alloy or cast iron. 2) The work plate made of light alloy, cast iron or steel plate shall be subjected to the test in Appendix E: 3) The minimum impact toughness of the workbench grinding plate made of vehicles is 35J/cm: R) The workbench should be:
1) Regardless of the degree to which the workbench is adjusted, the radial distance between the workbench plate and the cutting circle should be? mm2mm range (see Figure 3),
Figure 3 The distance between the workbench shoe and the cutting board 2) If the workbench or workbench lip plate has openings (for noise reduction), the height of the platform shall not exceed 6mm1. The length shall not exceed 15trm, and the width of the tooth shall be at least 6. The thickness of the lower tooth is 1.5mm and the root is at least 5mm (see Figure 4):
Figure 4 Slotted screen
3) The working lip cabinet with a length of more than 15mm shall be tested according to the appendix: 4) If the workbench or workbench lip plate has holes (for noise reduction), the holes shall be pinned and a return pin with a diameter of 6mm shall be used.
h) 1 The size of the table is recommended to be in accordance with Table 2. 3) If the machine structure is equipped with a detachable motorized feed device, the device should be fixed behind the guide plate. 10
Maximum plus 1 virtual
Kes600
Table 2 Working self dimensions
GE1B9562003
Workpiece: Self-explosion\Minimum cabinet of the system of the knife axis rotary axis (overlay at zero cutting position>1
Inspection method, check the corresponding drawings, material 5.2.6.1.2 The guide plate of the workpiece should be equipped with a guide plate. The guide plate is connected to the machine tool. For machines with a maximum processing width greater than 160mm, the guide plate should be used over the entire tool axis length without using tools. In the case of a variable material guide plate: its standard position is 90° to the workpiece, and its movement should be limited by a certain degree. The movement of the workpiece should be limited to the part of the workpiece that is not moved. The guide plate should be positioned in the same direction as the workpiece. The free distance between the 45° inclined guide plate and the workpiece in front of the guide plate should not exceed 5 m, in all positions of the guide plate (e.g. in the 45° inclined processing position). The inclined guide plate is located behind the shaft protection device and the shaft protection device is not required to be large. The size of the guide plate relative to the maximum processing width of the machine tool is recommended according to Table 3. The maximum size of the guide plate is not more than the maximum processing width of the machine tool. ||Minimum length
Height of guide plate
At any position, the gap between the worktable and the lower surface of the guide plate shall not exceed 5mm. (Except for beds with cutouts) When an auxiliary guide plate with adhesive is used to process thin workpieces, for example, it is connected to the main guide plate (see Figure 5), its height should be not less than 20mm and not more than 25mm, and its width should not exceed 50mm. Inspection method: check the corresponding drawings, measure and perform functional tests on the machine. Figure 5 Connection of auxiliary guide plate and main guide plate 1The gap between the workbench and the lower surface of the guide plate shall not exceed 5mm. (Except for beds with cutouts) When an auxiliary guide plate with adhesive is used to work thin workpieces, for example, it is connected to the main guide plate (see Figure 5), its height should be not less than 20mm and not more than 25m, and its width should not exceed 50m. Inspection method: check the corresponding drawings, measure and perform functional tests on the machine. Figure 5 Connection of auxiliary guide plate and main guide plate 1The gap between the workbench and the lower surface of the guide plate shall not exceed 5mm. (Except for beds with cutouts) When an auxiliary guide plate with adhesive is used to work thin workpieces, for example, it is connected to the main guide plate (see Figure 5), its height should be not less than 20mm and not more than 25m, and its width should not exceed 50m. Inspection method: check the corresponding drawings, measure and perform functional tests on the machine. Figure 5 Connection of auxiliary guide plate and main guide plate 1
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