ISO 16092-4:2019 pdf free
ISO 16092-4:2019 pdf free.Machine tools safety一Presses一Safety requirements for pneumatic presses
This clause contains all the significant hazards, hazardous situations and events identified by risk assessment as significant for the machines defined in the scope and which require a specific action to eliminate or reduce the risk.
These hazards are listed in ISO 16092-1:2017, Annex A. Additional hazards are listed in Table A.1.Pneumatic presses shall comply with the safety requirements and/or protective/risk reduction measures of this clause. In addition, the machine shall be designed according to the principles of ISO 12100 for relevant but not significant hazards which are not dealt with by this document.
The restraint device shall consist of one or more of the following measures, provided that they are capable of holding up the slide/ram:
a) return spring;
b) clamping device;
c) two pneumatic restraint valves, one of which is fitted as close as possible to the cylinder outlet,using flanged or welded pipework, capable of holding the slide/ram.
Power interlocking, as defined in ISO 14119:2013, 3.31, may be provided for presses fitted with interlocking guards. The guard interlocking device shall be positively linked with the valve to directly control the flow of fluid to and from the cylinder (see Annex C).
Manual override devices shall not be directly fitted to restraint valves. If manual override devices are incorporated into other valves for test or maintenance purposes, they shall require the use of a tool to operate the override.This override shall be of the non-locking type.
Safety functions of a pneumatic press shall meet the requirements stated in the Tables 1 and 2. Figure 1 shows an example of all relevant parts of a control system of pneumatic press with a safety function to stop any down stroke of the slide by ESPE using AOPD.
a) In particular, the instructions for installation shall state that the installer fit pressure switches in the line if air pressure can exceed the maximum air inlet pressure defined by the manufacturer, by more than 10 %.
b) Instructions on how to ensure that the increasing leakage speed of the slide/ram during use does not exceed 5 mm/s. This shall be maintained. ISO 16092-4 pdf free download.
