In industry, lasers are mainly used in the fields of cutting, welding, drilling and precision machining. Due to the high precision and high efficiency characteristics of laser, it is in the manufacturing industryPlays an important role in... For example, in automotive manufacturing, electronics manufacturing and other industries, laser processing technology can improve production efficiency and product quality. Medical applications: In the medical field, lasers are widely used in surgery, treatment and diagnosis.
Laser processing as the most commonly used application of laser system, the main technologies include laser welding, laser cutting, surface modification, laser marking, laser drilling, micro-machining and photochemical deposition, stereolithography, laser etching and so on.
Laser drilling can also be used to process watch diamonds. It can drill 20 to 30 holes per second, which is hundreds of times more efficient than mechanical processing.And of high quality. At the same time, laser drilling and the laser cutting we will talk about below, the processing process is non-contact, that is, unlike mechanical processing, the steel bit is gradually drilled through the metal material. Therefore, the laser operation can play a role in automated continuous processing, or in special environments with ultra-clean and vacuum.
Laser processing as an advanced manufacturing technology. Because there is no contact, no need for mold work, clean, efficient, convenient CNC and can be used for special processing, has been widely used in automotive, metallurgy, aerospace, machinery, textile, chemical industry, construction, shipbuilding, instrumentation, microelectronics industryPart A Quality inspection here mainly refers to the quality inspection of the QC department.
2. Job Description: Responsible for the procurement and follow-up of the company's raw materials, as well as communication and coordination with suppliers to ensure the delivery time and quality of raw materials.
3. Compress the QA batch rejection rate and reduce the rework cost of the production department. Reduce the unqualified rate of QA sampling inspection and reduce the proportion of cancellation.
4. QA personnel are generally divided according to the current version of GMP: verification specialist, quality management executive, quality risk analysis administrator, software preparation and management personnel, on-site supervision administrator, traditional Chinese medicine character appraiser, sampling pointsA lot of samples. You can set yourself up according to the above categories to enrich your professional knowledge in this field before applying.
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Bo Rui electric shaver quality is good, good style, feel very comfortable, inexpensive. It's not very loud. Frosted face, Borui razor quality is very good, charging is very convenient, shaving is also very clean, good to use, shaving is very comfortable, there will be no sting, shaving is very smooth. If it is often used with shaving gel, a knife tip can be used for a long time, in general,It is recommended.
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Features: Rotary triple blade, SkinIQ Honeycomb, 9 Series Pro, Smart Light sense Shaver S9936, wireless cleaning center, 60 minutes of battery life. Evaluation: Overall score 10, comfort advantage is obvious, but shaving efficiency in the face of short stiff beardIt's low. In short, through the comparative analysis of the characteristics of various brands of electric shavers and user evaluations, it can be found that different prices and types of electric shavers have their own advantages.
Low density polyethylene has good flexibility and transparency, and is often used in packaging films and containers; Medium density polyethylene is between low density and high density polyethylene, which has good toughness and mechanical properties. High density polyethylene has high strength and hardness and is suitable for injection molding and extrusion molding.
The micrometer and thickness gauge measure several points several times and then take an average. Finally, use the gram balance to carry the weight, and calculate the thickness of the bag by theory.
Some: PEEK (polyether ether ketone) has a transparent grade variety. Is a functional polymer material, can be blown into transparent pipe, can also be rolled into different thickness of the plate, can also use high screw ratio injection molding machine injection molding any high strength transparent plastic parts. There is only one domestic production, namely: "Jilin University special plastic development Company". Online "search by this keyword", you can get a lot of relevant information.
Sample rulerInch length 125mm x width 13mm x material thickness (typical thickness standards are 5mm, 0 mm, 0 mm). The number of samples of each thickness is 3, and the conditions should be treated for 48 hours in a constant temperature and humidity chamber with a temperature of 23℃ and a relative humidity of 50% before the test. When the sample is installed, the long axial plane is horizontal and the short axial plane is 45 degrees inclined.
Under the same conditions, the wall thickness of plastic parts reinforced and wall thickness has a great impact on its quality. When the wall thickness is too small, the flow resistance is large, and large complex products are difficult to fill the cavity. systemThe minimum size of the wall thickness should meet the following requirements: with sufficient strength and stiffness; ⒉ It can withstand the impact and vibration of the demoulding mechanism; It can withstand the fastening force when assembled.
The standard thickness of polycarbonate PC threading pipe is determined according to the outside diameter of the threading pipe, the following is the conventional outside diameter and thickness standards of PC threading pipe: polycarbonate (referred to as PC) is a polymer containing carbonate ester group in the molecular chain, according to the structure of the ester group can be divided into aliphatic, aromatic, aliphatic - aromatic and other types.