Automatic switch valve operation instructions Automatic valve operation is not a lot, as long as the factory set a good opening pressure or pressure on the import and export on it.
Stamping is a kind of process
that obtaining the required
shape and size of the parts by outside force on the metal sheet, strip, pipe shape material use mould and press machine,
in order to produce plastic deformation or separation. Stamping and
forging belong to plastic processing (or pressure processing), called the
forging press. The mainly stamping billets are hot rolling and cold rolling
steel plate and steel belt.
Stamping processing is a
production technology that use of conventional or special equipment of the
power, make the deformation sheet metal deformation in the mould. Thereby
produce a certain shape, size and performance parts. Sheet metal, stamping
mould and equipment are the three elements of stamping.
Stamping characteristics:
Compared with the castings,
forgings, stamping parts have the thin, uniform, light and strong characteristic. Stamping can make other methods are difficult to manufacture, such
as rib stiffener, flanging, ups and downs, or flanging products, in order to improve its stiffness. Because use precision mould, the
precision of part can reach micron grade, and repeat precision is high, the
specification is consistent, can punch a hole nest, convex sets, etc. Cold
stamping generally no longer by machining, or only need a small amount of
machining. Hot stamping precision and surface state is lower than the cold
stamping parts, but it's still better than the castings, forgings, less cutting
processing capacity.
The Advantage of stamping:
(1) The stamping process is high production efficiency, and easy
to operate, easy to realize mechanization and automation.
The process classification
of stamping:
Stamping is mainly classification by process, can be divided into
separation process and forming process. Separation process is also called the
blanking, and its purpose is to make the sheet metal of stamping parts
separated along the contour line, and at the same time guarantee the quality of
the separation section requirements. Forming process is designed to make sheet
metal occurred plastic deformation under the condition of not to break the
billet, made into the required shape and size of parts. In the actual
production, it is often a variety processes integrated applied to one part. Cutting,
bending, shear, deep drawing, bulging, spinning, correction are the main
stamping processes.
The conventional material of stamping part: Aluminum sheet like 6061,6063, stee alloy sheet like Q235, ST37-2, Stainless steel sheet like SS304,SS316;
The precision of the
stamping part: ±0.1mm;
The thickness of the metal
sheet we can do: 0.5mm~12mm;
The max size of the
stamping part in my factory: 1mX1m;
Surface preparation methods: Powder coating, Painting, Plating,
Electrophoresis, Polishing.
The Metal stamping and QC control equipment
Metal Stamping Parts, Precision Metal Stamped Parts, Steel Stamping Parts, Stainless Steel Stamping Parts, Aluminum Stamping Part NINGBO BEILUN LEMA MACHINERY TECHNOLOGY CO.,LTD , http://www.china-lema.com
1. Safety valve The safety valve must be pressed before the installation, pressure test, set the pressure setting, and some local safety valve can only be used after testing by the local testing authority. For example, steam safety valves used in power stations require on-site verification. When carrying out the verification, it must be organized and prepared to proceed, and the division of labor should be clear. Thermal calibration application standard table, when the constant pressure value is not accurate, it should be adjusted according to regulations. The pressure section and the use pressure of the spring must be adapted. The weight should be adjusted to the constant pressure value from left to right and fixed.
When the safety valve operates for a long time, the operator should pay attention to the inspection. The inspector should avoid the outlet of the safety valve, check the sealing surface of the safety valve, and use a safety valve with a handle to open the valve with a time interval to drain the dirt and verify the flexibility of the safety valve.
2. Pressure reducing valve Before the pressure reducing valve is enabled, the bypass valve or flushing valve should be opened to clean the pipeline dirt. After the pipeline is cleaned, close the bypass valve and open the pressure reducing valve. Some steam decompression valve valves have traps in front of them, which need to be opened first, and then the cut-off valve after the decompression valve is opened slightly. Finally, the cut-off valve in front of the decompression valve is opened to observe the pressure gauges before and after the decompression valve, and the decompression is adjusted. Valve adjustment screw, so that the pressure after the valve reaches a predetermined value, then slowly open the valve after the pressure relief valve, adjust the pressure after the valve until it reaches the specified value, and then fixed the adjustment screw, cover the protective cap.
If the pressure reducing valve fails to be repaired, the bypass valve should be opened and shut off before the valve is closed. Manually adjust the bypass valve so that the pressure after the pressure relief valve is basically at or below the predetermined value, and then close the pressure reducing valve. Shut-off valve, replace or repair pressure reducing valve. Wait until the pressure relief valve is replaced or repaired before returning to work.
3. Check Valves The operation of the check valve should avoid excessive impact caused by the valve being closed, and it should also avoid rapid vibration work on the valve closure.
In order to avoid excessive shock pressure due to the closing of the valve, the valve must be closed quickly to prevent the formation of a great backflow velocity, which is the cause of the shock pressure when the valve suddenly closes. Therefore, the closing speed of the valve should be properly matched with the reduction of the downstream medium.
4. Traps Traps are valves that are easily clogged with debris such as sewage. When enabled, first open the flush valve, flush the pipe, there is a bypass pipe, you can open the bypass valve seat for a short flush, there is no flush pipe and the bypass pipe trap, you can remove the trap, open the shut-off valve after flushing, and then Close the shut-off valve, install the trap, then open the shut-off valve and enable the trap.
(2) The mould ensure the
stamping precision of the size and shape when stamping, and generally does not
destroy the surface of the quality of stamping parts , and the life of the
mould are long, so the stamping quality is stable, has the characteristics of
"the same".
(3) The stamping can produce the part that
size range is larger, more complex shape parts, such as small to stopwatch of
watch, big to Auto longeron, cover parts, etc., and stamping material hardening
effect of cold deformation, the strength and stiffness of stamping is high.
(4) Stamping generally has no chip broken
material, material consumption is less, and do not need other heating equipment,
it is a kind of machining method that material saving, energy saving, stamping
parts cost is low.
