GB/T 32800.3-2016Hand-held non-electric power tools -- Safety requirements -- Part 3: Drills and tappers (English PDF)

1 Scope 1

2 Normative references 1

3 Terms and definitions 2

4 Safety requirements and/or protective measures 4

5 Inspection 7

6 Usage information 9

Appendix A (informative appendix) List of notable hazards 15

Appendix B (informative appendix) Examples of drilling and tapping machines covered by this section 17

Appendix C (Normative Appendix) Symbols for signs and signs 19

Appendix D (Normative Appendix) Additional Safety Requirements for Internal Combustion Power Tools 20

Reference 23

Safety requirements for hand-held non-electric power tools Part 3: Drilling and tapping machine

1 Scope

This part of GB/T 32800 is suitable for drilling holes in wood, metal, concrete, plastics and other materials in a rotary way or in metal Hand-held non-electric power tools (hereinafter referred to as "drilling and tapping machines") for tapping and trimming threads with plastics. Drilling and tapping machines can be compressed by Driven by air, hydraulic oil or internal combustion engine, it can be used by an operator with one or two hands with or without suspension devices such as balance devices.

Keep using.

This section is used for the following products.

---Drill;

---Heavy drill with two handles;

---Tapping machine.

Note 1.See Appendix B for examples of drilling and tapping machines.

This section does not apply to special requirements and modifications for installing the drill and tapping machine on the fixed device.

This section deals with the use of drills and tapping machines in potentially explosive environments, misuses that are reasonably foreseeable in the intended use and manufacturing plants all noteworthy hazards, dangerous situations or dangerous events when using the drill and tapping machine under conditions.

Note 2.EN13463-1 gives requirements for the use of non-electrical equipment in potentially explosive environments.

2 Normative references the following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 15706-2012 General Principles of Mechanical Safety Design Risk Assessment and Risk Reduction (ISO 12100:2010, IDT)

4.2.6.2 Two-way tools the main shaft of the two-way tool (reversible tool) should be designed to drive the drill in the forward and backward directions of rotation without causing the drill and the installation parts Loosen during operation. If a threaded spindle is used, measures should be taken to tighten the drill card.

4.2.7 Power tool structure the design and structure of the drill or tapping machine should prevent the loosening or loss of parts during the expected use, including rough handling and occasional throwing may damage its safety function, and should be inspected in accordance with the provisions of 5.5.

4.3 Thermal safety

The surface temperature of the parts held by the drill and tapping machine during use or that may be touched unintentionally should comply with ISO 13732-1 and the requirements of ISO 13732-3.

The design of pneumatic tools should avoid the cooling effect of exhaust air on the handle and other gripping areas.

4.4 Noise reduction

The design and structure of the drilling and tapping machine should take into account the effectiveness of technical improvements and noise reduction methods, especially the sound source noise, and the noise the sound dropped to its lowest level. Refer to ISO/T R11688-1 and ISO/T R11688-2 for related noise reduction design principles.

There are three main sources of noise radiation from drilling and tapping machines as follows.

---Drilling and tapping machine itself;

---Insert tool;

---Workpiece.

Note. Generally, the manufacturer of the drill and tapping machine cannot directly control the noise radiation caused by the characteristics of the workpiece.

The typical noise sources radiated by the drill and tapping machine itself are.

a) Motor and transmission mechanism noise;

b) Exhaust noise;

c) Noise caused by vibration or shock.

Exhaust is the main source of noise, so the design should include the design of noise reduction measures, such as installing a muffler or adopting an equivalent Measures.

Another feasible method is. the exhaust can be transported to a place far away from the operator with a hose.

The noise generated by vibration can often be reduced with vibration isolation and cushioning devices.

The above measures are not exhaustive. If there are more effective noise reduction measures, manufacturers should adopt them.

4.5 Vibration

The design and structure of the drill or tapping machine should take into account technical improvements and the effectiveness of vibration reduction measures, and particular attention should be paid to the vibration of the vibration source.

Minimize the vibration of the handle and any other places where the operator's hands can reach the tool. The original design of vibration reduction for drilling and tapping machines See CR1030-1 for the rationale.

Typical vibration sources radiated by drilling and tapping machines are.

---Unbalance of rotating parts;

---Poorly designed motors and gears;

---Machine components, especially the resonance of the handle and the handle base.

The following design structure has been proved to be effective, so the manufacturer should consider it when designing the drill and tapping machine.

a) Increase inertia;

b) Isolate the case or handle from vibration.

The above measures are not exhaustive. If there are more effective vibration reduction measures, manufacturers should adopt them.

4.6 Materials and substances processed, discarded or discharged

4.6.1 Exhaust

Drilling and tapping machines driven by compressed air or internal combustion engines should be designed in such a way that the exhaust direction cannot be inconsistent with the operator and any other Hazards caused by property, such as blowing dust and airflow reflected from the workpiece to the operator should be minimized.

4.6.2 Dust and fume

In terms of reasonable applicability, the design of the drill and tapping machine should facilitate the collection and removal or suppression of dust and smoke generated during the work process.

The user manual should contain enough information to enable the user to fully control the risks caused by dust and smoke.

4.6.3 Lubricants

When determining lubricants, the manufacturer should consider the environment and occupational health.

4.7 Ergonomics

4.7.1 The design of the handle the design of the gripping area of the drill and tapping machine should be convenient for the operator to conveniently, effectively and freely control the drill and tapping machine.

The design of the handle and other parts used to hold the drill and tapping machine should ensure that the operator can hold the drill and tapping machine correctly and fulfill expectations work. The handle should be suitable for the functional structure of the human hand and the hand size of most operators.

Note. For more guidance on ergonomic design principles, see EN614-1.

Drilling and tapping machines with a mass greater than 2kg (including insertion tools) should be able to be lifted or operated under the support of both hands.

The handle should enable normal thrust and reverse torque to be transmitted from the operator's arm to the drill and tapping machine in an ergonomic way.

The strength of the replaceable handle and its fixing method should be suitable for the intended main purpose.

4.7.2 Suspension device Appropriate measures should be taken to enable the drill or tapping machine to be hung on the suspension device to reduce the weight of the drill or tapping machine to the operator Physical burden. The assembled suspension device should not cause additional hazards.

4.7.3 Anti-torque

The design of drilling and tapping machines should minimize the impact of back torque. You can install an auxiliary handle or take other appropriate measures.

Shi to achieve.

For straight shank tools, an auxiliary handle should be installed when the operator's reaction torque may exceed 4N·m.

For gun handle tools, an auxiliary handle should be installed when the operator's reaction torque may exceed 10N·m.

4.8 Control device

4.8.1 Start-stop device the drill and tapping machine should be equipped with an independent control device for starting and/or stopping the tool. The device should be adapted to the handle, or the gripping part of the drill or tapping machine, so that the operator can hold the tool comfortably when the tool is running, and operate without releasing the grip handle the person can also start the device.

The start-stop device should be designed to stop the action by inserting the tool when the device is released. When there is no manual operating force and fully released, the device the position that should be moved to the stop should be a holding start-stop device.

When the drill or tapping machine is connected to the power source, the start-stop device should be in the stop position or immediately move to the stop position.

The start-stop device should not have the possibility of being locked in the operating position.

4.8.2 Unexpected start for drills and tapping machines with a maximum clamping diameter of more than 10mm, the design, arrangement or protection of the start-stop device used should be considered.

The risk of external starting is reduced to a minimum, and the inspection should be carried out in accordance with 5.4.

4.8.3 Control force

For drilling and tapping machines that need to be started frequently or used for precise work, the force to operate the start-stop device should be slight.

For drilling and tapping machines that usually run for a long time, the operating force to keep the starting device in the running position should be slight.

Note. For more information about the starting power of the control device, see EN894-3.

4.8.4 Direction control device it is dangerous for a drill or tapping machine to start in an unexpected direction because the power tool will rotate in an unexpected direction. If drill or tap the silk machine may start in the reverse direction, and the arrow should be used to clearly mark the rotation of the main shaft at the position of the control device used to control the forward and reverse rotation.

direction.

From the position of the operator, the clockwise direction is defined as forward rotation.

5 Inspection

5.1 Test general conditions the tests carried out in this section are type tests.

5.2 Noise

The noise radiation value should be measured and marked in accordance with ISO 15744.

Compliance with 4.4 can be compared with other similar machines or machines with similar specifications and performance characteristics.

test.

5.3 Vibration

The total vibration value of the drill should be measured and reported in accordance with ISO 28927-5, and the total vibration value of the tapping machine should be in accordance with ISO 20643.

Be sure to perform measurements and reports.

Vibration radiation value and its uncertainty shall be marked according to EN12096.

Compliance with 4.5 can be made by comparison with other similar machines or machines with similar specifications and performance characteristics.

test.

5.4 Unexpected start Compliance with 4.8.2 shall be inspected according to the following methods.

The drill or tapping machine with the maximum clamping diameter of the chuck greater than 10mm should be connected to the power source and placed in any possible position.

And then use the air intake hose connected to it to pull it across the horizontal surface.

During the above process, the start-stop device should not start accidentally.

5.5 Power tool structure the inspection method for compliance with 4.2.7 should be. a prototype of a drill or tapping machine without inserting tools is mixed from a height of 1m.

6 Usage information