ISO 12290 pdf downoad – Aerospace一Rivets, solid, in titanium or titanium alloy一Procurement specification

ISO 12290 pdf downoad – Aerospace一Rivets, solid, in titanium or titanium alloy一Procurement specification.
time lapse between the initiation point of an operation and its point of completion, these points being defined for each type of component
4.0.7.1
valve response time
the initial point is the moment when the pilot pressure rises/tails past a given point; the completion point is when a given value of the outlet pressure or flow has been reached
4.0.7.1.1
dead time of a pneumatic directional control valve with pneumatic control
the initial point is the moment when the pilot pressure riseslfalls past a given level; the completion point is the moment when the outlet pressure reaches a specified percentage of its maximum, the outlet being connected to zero capacity (outlet port closed)
4.0.7.1.2
dead time of a pneumatic directional control valve with electrical control
the initial point is the opening (or closing) of the electrical circuit; the completion point is the moment when the outlet pressure reaches a specified percentage ot its maximum, the outlet being connected to zero capacity (outlet port closed)
4.0.7.1.3
switching time
switch-on time for an output going from the 0-state to the 1-state; switch-off time for an output going from the 1-state to the 0-state
4.0.8.1
switching pressure
minimum pilot pressure necessary to cause a change of state at an output port
4.0.8.2
switching time
time the initial point is the moment when the control or pilot pressure reaches the level of switching pressure; the completion point is when a given value of the outlet pressure has been reached
A.2 From CETOP RP111P – 1989-11-01
3.1.3
switching threshold
the joint effect of two limiting values, rising or falling, on the one hand the signal pressure and on the other signal voltage, which causes or allows switching
switching time
the complete transition from an initial to a final state under the normal operating conditions foreseen by the manufacturer (no oscillations, correct sealing, normal flow values, etc.)
surface treatment be removed prior to heat treatment, without being detrimental to rivet final use. A note to this effect shall be added to the corresponding inspection documents.
Unless otherwise specified, the test temperature shall be the ambient temperature.
4.3 Use of ‘Statistical process control (SPC)”
When a characteristic is obtained by a controlled statistical process. the manufacturer has the possibility, in order to declare conformity of the characteristic, of refraining from the final systematic sampling provided for in this International Standard, if he is capable of formally justifying this choice by using ISO/TR 13425 and the standards quoted in it as a basis.
This justification will include the following phases:
— analysis of the products key characteristics:
— analysis of the risks for each implemented process:
determination of the parameters and/or characteristics to be respected under SPC; determination of the capabilities of each process:
drawing up an inspection plan and integration in the manufacturing process:
drawin9 up of routes and control charts (ISO 7966, ISO 7870, ISO 8258); use of control charts for data consolidation;
determination of the audits to be run and the control to be carried out to ensure reliability of the device.
To be usable in production, this process shall be or should be validated beforehand by the qualifying body, either during the qualification phase, or a posteriori according to the case, by analysing the justificatory file and the results of the qualification inspections such as provided for in clause 5.