Cleaning step
Valve components must be processed through the following processes before assembly:
1. According to the processing requirements, some parts need to be polished, and the surface cannot be processed with burrs;
2. All parts are degreased;
3. After the degreasing is completed, the acid washing passivation is carried out, and the cleaning agent does not contain phosphorus;
4, after pickling and purification, rinse with pure water, there can be no drug residue, carbon steel parts save this step;
5. Dry the parts one by one with a non-woven fabric, and do not leave the surface of the parts such as wire wool, or blow dry with clean nitrogen;
6. Use a non-woven fabric or a precision filter paper to analyze the pure alcohol and wipe each component one by one until there is no dirty color.
Assembly requirements
The cleaned parts must be sealed and stored for installation. The requirements for the installation process are as follows:
1. The installation workshop must be clean, or set up a temporary clean area, such as the use of newly purchased color strips or plastic film to prevent dust from entering during the installation process.
2, the assembly workers must be dressed in clean cotton overalls, wearing a cotton cap, hair can not leak, wear clean shoes, hands wearing plastic gloves, skim,.
3. The assembly tool must be degreased and cleaned before assembly to ensure cleanliness.
other requirements
1. The assembled valve is purged with nitrogen for at least 1 minute.
2. The airtight test must be pure nitrogen.
3. After the airtight test is passed, encapsulation is carried out, sealed with a clean polyethylene cap, and the polyethylene cap is soaked with an organic solvent before use and wiped clean.
4. Then seal with a vacuum bag.
5, finally packing.
6. Measures should be taken during transportation to ensure that the envelope is not damaged.
4. Acceptance requirements
Acceptance follows HG 20202-2000 "Degreasing Engineering Construction and Acceptance Specifications". Each component is cleaned with clean precision filter paper before assembly, and the dead angle of the component is selected. The color of the filter paper is qualified.
LS beariing offers many linear motion components which can be purchased online. Our frelon® lined bearings can carry 4 to 8 times the load of ball bearings. New line of stainless steel precision shafting features 1/64" x 45° chamfer at both ends. Guide blocks made of AISI 1055 steel, concentric and eccentric type guide wheels as well as new needle bearing cam followers are available for purchase in this section.
Linear Bearings
Linear motion is the most basic of all motion. Linear ball bearings provide linear movement in one direction.
A Roller Bearing, carries a load by placing rolling balls or rollers between two bearing rings called races. These bearings are comprised of an outer ring and several rows of balls retained by cages. Roller bearings are manufactured in two styles: ball slides and roller slides.
Ball Slides
Ball Bearing slides are the most common type of linear slide. They use self-lubricated ball bearings housed in the base. This arrangement offers smooth precise movement along a single-axis linear design. Typically constructed from aluminum, hardened cold rolled steel or galvanized steel, ball bearing slides consist of two linear rows of ball bearings contained by four rods located on opposite sides of the base, which support the carriage for smooth linear movement. This low-friction linear movement can be powered by a drive mechanism, by hand, or inertia. Ball bearing slides have a lower load capacity compared to other linear slides, this is because the balls are less resistant to wear and abrasions. Ball bearing slide applications include fragile instrumentation, robotics, cabinetry and appliances.
Roller Slides
Roller slides are non-motorized. Roller slides are based on linear roller bearings, which are frequently criss-crossed to provide heavier load capabilities and better movement control. They provide low-friction linear movement for hand-powered equipment. Roller slides are versatile and can be adjusted to meet numerous applications which typically include clean rooms, vacuum environments, material handling and automation machinery.
Consisting of a stationary linear base and a moving carriage, roller slides work similarly to ball slides, except that the bearings housed within the carriage are cylindrical shaped instead of ball shaped. The bearing races are "V" grooved, one being on the top carriage and the other on the base. Typically, carriages are constructed from aluminum and the rods and rollers are constructed from steel.
Although roller slides are not self-cleaning, they are suitable for environments with low levels dirt and dust. Roller slides are capable of providing linear motion on more than one axis through stackable slides and double carriages. Roller slides have a broader contact surface due to contact between the carriage and the base and resulting in less erosion.
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.lsjgbearing.com