Oasis blockchain customer service

1. What is jlabh? In fact, oasis is a team with great personality. The whole team is highly academic. All along, oasis's team has been relatively low-key. Its publicity is Buddhist. It's rare to see articles about oasis. In the Chinese market, it was not until the beginning of this summer that Chinese ambassadors were selected. The name of oasis is great. It's amber. Amber is a common English name, which means amber. A very beautiful color, giving people the feeling of confidence and friendly. Yesterday, oasis announced the launch of rose, the original token of oasis network< br />

teams with pure academic background often have a very romantic vision for the future blueprint. The development of blockchain is still in its early stage. It's like building a home in a desert. Oasis is an oasis. On this new oasis, there are amber highways and blooming roses everywhere. It's very romantic. Of course, this is my personal interpretation

the official announcement: the circulation of rose tokens at the start of the main network is about 1.5 billion, and the total upper limit of tokens is 10 billion. Oasis protocol says the word "Rose" has historically been seen as a symbol of privacy. In China, the interpretation of rose is not just romantic. It also means loud and exciting. The code name of Chinese women's football in its heyday is sonorous rose. At that time, the women's football team was a world-class team, and the best place was second in the world

it is officially announced that rose token will be used for all the functions of transaction, pledge and entrustment on Oasis network. Rose's token allocation model is as follows: 1; 2. Early supporters 2.3 billion tokens; 3. Community and ecosystem 2.25 billion tokens; 4. The Foundation donated 1 billion tokens; 5. Strategic partners and reserves of 500 million tokens; 6. Core contributor 2 billion tokens

jlab note: Oasis labs was founded by Professor dawn song Xiaodong, a professor in the Department of computer science at the University of California, Berkeley. It aims to solve the current pain points of blockchain in terms of performance, security and privacy. In July 2018, oasis labs obtained US $45 million in financing, and a16z crypto, Gaorong capital, coin an incubator, polychain and jlab participated in the investment, Coinbase co-founder Fred ehrsam is also involved in the investment in his personal capacity. In mid June, oasis labs officially launched the main network candidate version "oasis amber network". Amber network includes all the core functions when the main network is started, such as pledge and entrustment, fully decentralized consensus layer, integrated ledger wallet (to be launched) and verifier's commission rate tool.

2. The length of internal thread shall be consistent with the length of screw in

the screwing length refers to the length of the screwing part of two matching threads along the thread axis. The value of the screwing length should be appropriate. Increasing the screwing length within a certain range can effectively improve the connection strength, but too long screwing length will not improve the connection strength, but also rece the connection quality and increase the cost. According to the national standard, according to the nominal diameter and pitch of thread, three groups of screwing length are specified for thread connection: short Screwing Length (s), medium Screwing Length (n) and long Screwing Length (L). Generally, medium screwing length should be adopted, and short Screwing Length and long screwing length can be adopted only when the structure and strength have special needs. The value of medium rotation length is 0.5 ~ 1.5 times of nominal diameter. To be specific to your design, you only need to select the spin length group and mark it in the part drawing, such as M6 × 0.75-5h6h-s-lh (medium screw length group is not marked, refer to thread marking method)
the table of screw length can be referred to GB / t197-2003 or mechanical design manual.

3. How is the thread length determined

The thread length is calculated according to its bearing capacity, and there is an upper limit. The lower limit is determined according to the actual processing conditions

2, the length of your case should be between 20-30mm

2, what is thread:

thread is a figure composed of linear, it has many kinds. The most intuitionistic is the protruding part of spiral line with specific section made on the surface of cylinder or cone. The thread can be divided into cylindrical thread and conical thread according to its parent shape; According to its position in the matrix, it can be divided into external thread and internal thread. According to its cross-section shape (tooth type), it can be divided into triangular thread, rectangular thread, trapezoidal thread, serrated thread and other special shape threads. Triangular thread is mainly used for connection, while rectangular, trapezoidal and serrated thread are mainly used for transmission; According to the direction of helix, it can be divided into left-hand thread and right-hand thread, generally right-hand thread; According to the number of helix, it can be divided into single thread, double thread and multi thread; The connection is mostly single line, and the transmission is double line or multi line; According to the size of the teeth, it can be divided into coarse thread and fine thread. According to the use occasions and functions, it can be divided into fastening thread, pipe thread, transmission thread, special thread, etc

According to its cross-section shape (tooth profile), thread can be divided into triangular thread, rectangular thread, trapezoidal thread and serrated thread. The triangular thread is mainly used for connection (see thread connection), and the rectangular, trapezoidal and serrated threads are mainly used for transmission. Threads distributed on the outer surface of the matrix are called external threads, while those on the inner surface of the matrix are called internal threads. The thread formed on the cylindrical matrix is called cylindrical thread, and the thread formed on the conical matrix is called conical thread. The screw thread is divided into left-handed and right-handed according to the direction of helix, and right-handed screw thread is generally used. The thread can be divided into single thread and multi thread, and the connection is mostly single thread; When it is used for transmission, it requires fast advance or high efficiency. Two or more lines are used, but generally no more than 4 lines

triangular thread is mainly used for connection, while rectangular, trapezoidal and serrated thread are mainly used for transmission; According to the direction of helix, it can be divided into left-hand thread and right-hand thread, generally right-hand thread; According to the number of helix, it can be divided into single thread, double thread and multi thread; The connection is mostly single line, and the transmission is double line or multi line; According to the size of the teeth, it can be divided into coarse thread and fine thread. According to the use occasions and functions, it can be divided into fastening thread, pipe thread, transmission thread, special thread, etc

In

cylindrical thread, triangular thread has good self-locking performance. It is divided into two kinds of coarse teeth and fine teeth. Fine teeth have small pitch, small angle of rise and better self-locking performance. They are often used in thin-walled tubes of small parts, connection with vibration or variable load and fine-tuning devices. Pipe thread is used for tight connection of pipe fittings. Rectangular thread has high efficiency, but it is often replaced by trapezoidal thread because it is not easy to grind and it is difficult to center the internal and external threads. The working edge of serrated thread is close to rectangular straight edge, which is mostly used to bear one-way axial force

The thread shape of taper thread is triangle, which mainly depends on the deformation of the thread to ensure the tightness of the thread pair, and is mostly used for pipe fittings

four, diagram:

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4.

According to the national standard, the screwing length of common thread is divided into three groups: short (s), medium (n) and long (L). The accuracy of thread is divided into precision, medium and rough. The code of tolerance zone is different with different screw length and accuracy grade

In general, the screw in length of thread is not marked, and the thread tolerance zone is determined by the medium screw in length (n); If necessary, add the screw length code s or l after the thread tolerance zone code, such as m10-5g6g-s; In case of special needs, the value of screwing length can be indicated, such as M20 * 2lh-7g6g-40

extended data

importance of screw in length:

1) reliability of connection, and screw in depth ensures the reliability of connection

(2) if the thread processing is too long, the accuracy is difficult to guarantee and the cost is high

The depth of the threaded hole is very limited, so it should be as short as possible on the premise of ensuring the connection strength. On the contrary, e to the temperature difference deformation and machining error, the screw in depth is too long and the connection effect is not good

5. The diameter of anchor bolt should be calculated according to the moment?! The minimum area of each bolt can be calculated by dividing the total torque by the number of anchor bolts and the allowable torque selected by different bolt materials. According to this area, the thread diameter of the bolt can be determined, and the bolt diameter can be obtained. Of course, for the sake of insurance, you can choose a bigger one.

6. Calculation of screw in depth:
three main points: a. the reliability of the connection, the number of screw in depth to ensure the reliability of the connection, the most basic; b. If the thread processing is too long, the accuracy is difficult to guarantee, and the cost is high, especially in the precision parts, the common ones are 6h; c. I feel that it is the most important. In many cases, the depth of the threaded hole is very limited. To prevent interference with other surfaces, especially the sealing surface, penetration, air leakage and oil leakage, it should be as short as possible on the premise of ensuring the connection strength. In addition, e to temperature difference, deformation and machining error, the screw is too deep, which makes the screw not strong and the connection effect is not good
there are two empirical formulas for thread penetration depth: A. according to different screw hole materials, 1XD (steel or bronze), 1.25 ~ 1.5D (cast iron) and 1.5 ~ 2.5D (aluminum alloy); b. According to the law of screw force decreasing, take 8 ~ 10p (P is pitch)
generally speaking, the first three threads will bear more than 80% of the force for the screw depth. Therefore, the length of rotation should not be less than 5 buckles
for method a, it is the empirical formula mentioned in the design manual, which mainly considers the properties of materials. Generally speaking, it takes into account that different materials have different degrees of difficulty in thread damage and different number of spare threads
for method B, the strength (that is, the pressure) is determined by the size and pitch of the thread when the thread bears the axial force. Generally, the length of 8-10 pitches is selected for the depth, because when the thread bears the axial force, the force of the first pitch is the largest, and decreases in turn. When the thread bears the 8-10 pitches, the force is almost zero, So it doesn't matter how long the thread is. It generally ignores the influence of material properties, and considers the screw stress analysis.

7. Calculation of screw in depth:
three main points: a. the reliability of the connection, the number of screw in depth to ensure the reliability of the connection, the most basic; b. If the thread processing is too long, the accuracy is difficult to guarantee, and the cost is high, especially in precision parts, the common time is 6h; c. I feel that it is the most important. In many cases, the depth of the threaded hole is very limited. To prevent interference with other surfaces, especially the sealing surface, penetration, air leakage and oil leakage, it should be as short as possible on the premise of ensuring the connection strength. In addition, e to temperature difference, deformation and machining error, the screw is too deep, which makes the screw not strong and the connection effect is not good
there are two empirical formulas of thread penetration depth: A. according to different screw hole materials,
1XD (steel or bronze), 1.25 ~ 1.5D (cast iron), 1.5 ~ 2.5D (aluminum alloy); b. According to the law of screw force decreasing, take 8 ~ 10p (P is pitch)
generally speaking, the first three threads will bear more than 80% of the force for the screw depth. Therefore, the length of rotation should not be less than 5 buckles
for method a, it is the empirical formula mentioned in the design manual, which mainly considers the properties of materials. Generally speaking, it takes into account that different materials have different degrees of difficulty in thread damage and different number of spare threads
for method B, the strength (that is, the pressure) is determined by the size and pitch of the thread when the thread bears the axial force. Generally, the length of 8-10 pitches is selected for the depth, because when the thread bears the axial force, the force of the first pitch is the largest, and decreases in turn. When the thread bears the 8-10 pitches, the force is almost zero, So it doesn't matter how long the thread is. It generally ignores the influence of material properties, and considers the screw stress analysis.