Go shopping mall diary

1. The size of the neutral surface of the part is calculated according to the principle of constant volume. The general safe method is to calculate the unfolded size after tensile test to confirm the size of blanking die.

2. That's enough. The main cylinder is 100 tons, and the bottom cylinder is 25 tons. If the voltage is normal, the 100 tons hydraulic press will be OK. Of course, your 200 is very easy to work

3. And the shape and wall thickness of the proct, and you have to check whether the air cushion top output of the press you choose meets the requirements.

4. The deformation characteristic of the drawing process is that the large cross-sectional area of the blank becomes the small cross-sectional area of the cylinder. The so-called drawing coefficient is the ratio of the cross-sectional area after each drawing to the cross-sectional area before drawing:
that is, M = an / an-1
m-drawing coefficient
an-cross-sectional area after drawing (mm & # 178;)
an-1 -- cross sectional area before drawing (mm & # 178;)< For cylindrical parts, the drawing coefficient should be:
m = an / an-1= π dnt)/( π Dn-1t) = dn / DN-1
where m -- drawing coefficient of cylindrical part
DN -- diameter after drawing (mm & # 178;)
DN-1 -- diameter before drawing (mm & # 178;)
T -- material thickness
the drawing coefficient of the cylindrical part is the ratio of the diameter of the cylindrical part after each drawing to the diameter of the blank (or semi-finished proct) before drawing. That is:
first drawing M0 = D1 / d0
later drawing M2 = D2 / D1, m3 = D3 / D2,..., Mn = dn / DN-1
where M1, M2, m3...... M0 -- drawing coefficient
d0 -- blank diameter (mm & # 178;)
D1, D2, D3,... D0 -- diameter of each semi-finished proct or workpiece (mm & # 178;)

5. The deformation characteristic of the drawing process is that the large cross-sectional area of the blank becomes the small cross-sectional area of the cylinder
the so-called drawing coefficient refers to the ratio of the cross-sectional area after each drawing to the cross-sectional area before drawing: M = an / an-1 m -- drawing coefficient an -- the cross-sectional area after drawing (mm & # 178;) An-1 -- cross sectional area before drawing (mm & # 178;) The drawing coefficient of the cylindrical part.

6.

has two ways:

1, dial the Bank of Communications credit card customer service telephone 400-800-9888, according to voice prompt, select 1 by Chinese, input credit card number and ID number, and finally press 0 to make the customer service. p>

295559 after calling, press "1" to enter the Mandarin Service area, and then press "0" to connect the manual service

extended information:

Bank of communications customer service hotline and main business handling:

1. Bank of communications customer service hotline: 95559, Bank of communications national unified customer service hotline, which can be called to inquire about the business of Bank of communications

2. Bank of Communications credit card customer service telephone: 400-800-9888, to provide services for Bank of Communications credit card customers, can activate, report loss, password management and other credit card services

3. Bank of communications platinum Secretary hotline: 4008-666-888, in addition to basic credit card services, it also provides platinum card users with additional functions such as mobile phone binding function, agency, air ticket and hotel reservation

Standard card, y-power card, business card, Shanghai travel card, Expo card service hotline: 400-800-9888, these kinds of cards can deal with these problems more directly and quickly

5. Co branded card service hotline: 400-889-3888, special telephone for CO branded card users of Bank of communications, providing co branded card related services

6. Quasi credit card service hotline: 400-809-5559, providing quasi credit card related services

7. Overseas call the credit card customer service hotline of Bank of Communications: 86-21-53529888, which can also provide credit card loss reporting, password management and other services

7.

Beijing public transport all-in-one card customer service: 01088087733

when applying at all-in-one card issuing / recharging outlets, the deposit of each card is 20 yuan, and the amount must be recharged at the time of application, and the amount shall not be less than 20 yuan. When recharging again, the amount shall be 10 yuan or an integral multiple of 10 yuan. There are many card issuing / recharging outlets, which are usually located near the railway station, subway station and bus terminus. For details, please visit the municipal transportation all-in-one card website

the use of all-in-one card is very wide, the most commonly used is to take the bus and subway, in addition, you can also take a taxi, rent a public bicycle, make a public phone call, visit the park attractions, swipe the card in small consumer places, etc

the biggest advantage of using all-in-one card is that it is cheap. 50% off for bus, 80% off for subway (except airport line) and 50% off for 150 yuan. Note: at present, you have to swipe your card when you get on and off the bus. If you forget to swipe your card when you get off the bus, you will be charged

when recharging, you can recharge manually through the outlets, you can recharge by yourself on the subway self-service equipment, and you can also recharge online with computers and mobile phones

when you return your card, you need to go to the card return outlets. The card return outlets are far less than the card handling / recharge outlets. For details, please visit the municipal transportation all-in-one card website. When traveling, you need to find a good refund network in advance and plan the route to avoid unnecessary losses

extended data:

e-invoice application process

download the "Beijing all in one card" app, complete online registration

enter the "personal" interface, select "e-invoice", complete real name authentication according to the prompt

select the business to be invoiced, Then input the card number to complete the card binding

fill in the valid invoice information and email address according to the prompt

select the transaction details to be invoiced, submit the invoice application

after confirming the submission, the e-invoice will be sent to the user's designated mailbox, and the user can click "invoice preview" in the invoice history to view the e-invoice information