51吃瓜

?????? ??? ???? ?? ?????? ??? ??? ???? ???? ???? ??? ??? (??????? ??? ?? ? ???) ?? ???? ?????? ?????? ?????? ?????? ???????? ?????? ????? ? ????? ??? ???. ????? ????? ?? ??? ??? ?? ???? ?? ???? ????? ???.

Sheet Metal Processing method: Non mold processing: The process of sheet metal processing through equipment such as numerical punching, laser cutting, shearing machines, bending machines, riveting machines, etc. It is generally used for sample production or small batch production, with high costs. ???? ?????? ????? ? ???? ????. ?????? ????: ??????? ?? ???? ???? ???? ?????? ??? ????? ??????? ???? ???? ?????? ? ???? ??? ??????? ?? ?? ??? ???? ????? ????? ?? ????????? ???? ??????? ??????. ??????? ????? ??? ???? ??? ? ????? ?????? ????? ??????. ?????? ?????? ????? ?????? ??? ? ??????? ?? ???? ???. ?????? ?????? ??? ????: ??? ????: ??? ?????? ? ??? ???? ? ?????? ???????

??? - ?????? ?????? ?????: ????? ?????? ????? ?????? ??? ??

?????? ????: ???????? ??? ? ???

?????: the connection method of sheet metal

????? ???: ?????? ????? ???????????? ????? ???? ??? ???? ? ??? ?? ??

???????? ?????? ???? ???? - ??????? ???? ????? ???? ???? ???? ???? ??????? ?????? ????? ????? ?????????? ??????? ? ????? ???? ???. CNC ?? ??? ???? ?? ??? ?????? ??????? ??????? ? ???? ????? ???? ?? ??????? ?????????? ??????? ?????? (?? ???????? ???????? ???? ???? ????????? ?? ?????? ???) ?? ?

??? ???? ?? ?? ??? ??? ????? ??? ?? ?? ??????? ?? ???????? ????? ????? ???????

???????? ?????? ?????? ?? ????? ????? ????????? CNC? ???????? ???? ???? ?????????? ??????????? ?????????? ???????? ? ??? ?? ?? ??????? ???. ???? ????????????? ???????? ?? +/-0.1mm ????.

????? ??? ?????? CNC ??? ???:

???? ??? ??? ? ??? ????.??

???? ?????? 5.0mm

???? steel ?? ??????? 2.0mm

???? ?????? ?????? ???? ???? ???? ???? ?????? ?????? ???? ?? ??? ?????? ???????? ??????? ???? ? ????? ???? ?????? ????. (??????? ?? ?? ????? ??? ???? ???? ???) ???? @ @ 000

2. ??????? ??? ? ??????? ????????? ????????. ?????? ?? ??????????? ????? ??? ??????? ???????? ???? ? ??????? ????? ???? ?????? ?? ????? ????? ???? ????? ??????????? ????? ????? ???? ?? ??? ?????? t ????. When parallel, it should not be less than 1.5t. (??????? ?? ?? ????? ??? ???? ???? ???)

3. ?????? ?? ????? ????? ??????? ????? ????? ??? ????? ????? ? ?????? ?T ???? ????? ????? ??? ?? ????? ????? ?T ???? ? ????? ????? ??? ??? ????? ????? ? ??? ????? (????) ?T+R ??? (T ???? ??? ???? R ??? ????? ???)

4. ?????? ?? ???????? ?? ?? ??????? ?????? ? ???? ? ??????? ???? ????? ??????? ?? ????? ???? ???? ??? ????? ????? ? ????? ?????? ??? ????. (??????? ?? ?? ????? ??? ???? ???? ???)

???????? ?????? ???? ???? - ??? ???? ???? ????? ????? ???? ? ????? ???? ???? ???.

?. ??? ?????? ??????? ?? ??? ?.? ?????? ?????? ?????? ?????? ?????? ?????? ?????? ?????? ?????

?????? ?????????? ???????????

?? ???:+/-0.1mm

??? ???:+/-0.2mm

??? ?? ?? ???? ????:+/-?.?mm

??? ?????? ?? ????? ??????????? ?? ???? ? ?? ???? ?? ???? ???. ??????? ???? ???? ??? ????? ???? ? ?????? ???? ???? ?? ?????? ??? ?? ???????? ????? ?? ????? ???.

?.? ??? ????? ??????:

??????? ?? ???? ??????:

?.? ?????????? ??????? ?? ???????? ???????:

?????? ?? ???? ????? ??????? ???? ????? ?????? ?????? ? ???? ????? ?? ???????? ???? ??????. ?????? ?? ????? ???? ???? ????? ?????? ????? r? ??? ???? ???? ? ???? ???? ???. ?????? ?? ????? ??? ?? ???????? ??? ??? ? ????? ?? ????? ???? ????? ???????? ? ???????? ???????. ????????? ????? ??????? ?????? ???? ?? ?????? ???????? ???? ??? ???????. ???????? ????????? ?? ???????? ??????? ??????? ??? ?? ???? ?? ??? ??? ???? ???? ??????.

Minimum bending radius table for bend parts:

???? ????? ?? ???? ????? ?? ???? ????? ????? ???????? ? t ?? ???? ?????? ?? ???? ???.

???? ????? ?????? ???? ???? ?.? ???:

?????? ?????? ?????? ??? ?????? ????? ???? ???? ????? ? ??????? ?????? ?????? ??? ???: h>2t

??? ?????? ??? ???? h2t ?? ???? ??? ???? ????? ????? ??? ?????? ??? ??? ?? ?????? ???? ? ??? ?? ?? ?? ?????? ???? ??? ?? ??? ???? ?? ?????? ??? ???. ?? ??? ?? ?????? ???????? ????????? ?? ??????? ????? ????? ??????????? ???????? ????????? ????? ????.

?.? ?????? ????? ?????? ????? ?? ???????? ?? ??? ??????? ???????? ???:

?????? ?? ?? ???? ???? ?? ?? ??? ???? ??????? ????? ????? ?? ??? ??? ???: h=(2-4) t> ??

1.7 ????? ???? ???????? ?? ???????? ????:

??????? ????? ??: ??? ????? ?? ???? ???? ? ??? ?? ?? ??????. ?????? ????? ???? ????? ??????? ????? ????? ????? ???? ?? ?? ????? ????? ????? ????? ?? ??? ????? ????. ????? ?? ????? ????? ?? ??? ???? ?? ??? ??? ????? ??????.

?. ? ???? ?????? ???? ???? ????:

?? ????? ???? ???? ????? ?????? ???? ?? ?????? ????? ?????? ?????? ???? ???. ?????? ?? ?? ??? ???? ?? ??? ????? ???? ??????? ????? ????? ? ????? ?? ???????? ??? ???????? ?? ????? ???? ?? ???? ??? ?? ?????? ????? ?????? (????? a) ?? ?? ???? ?????? (????? b) ??? ???? ?? ?? ????? ?????? ???????? ????? ??? (????? c). ???? ???? ?? ??????? ?????? ?? ??????: SR; ?????? Slot kt; ???? Slot Lt+R+k/2.

?.? ??????? ????? ?? ??????? ????? ???? ?? ????????? ?????????? ???? ???:

?.?? ??????? ????? ???? ??????? ???? (??????? ????):

??? ??????? ??? ??? ?? ????? ???? ?????? ????. ??????? ?? ?? ????? ???? ???? ???? ??????? ????? ??? ?? ??? ???? ????? L3.5t+R ???.

?? ???? ????? t ????? ???? ???? ? R ???????? ???? ????? ?? ?????? ???? ??? (??????? ?? ?? ???? ???? ?? ????? ??? ???? ???? ??????) ??? ?? ???? ???.

1.11 Process positioning holes added:

???? ????? ???? ?????? ???? ???? ?? ???? ? ??????? ?? ????? ???? ???? ?? ??? ????? ????? ?????? ?????? ?? ?????? ????? ???? ??? ?? ??? ????? ???? ??????? ?? ?? ??? ????? ???? ???? ??? ???. Especially for parts that have been bent multiple times, the process holes must be used as the positioning reference to reduce cumulative errors and ensure product quality.

?????? ?? ????? ?????????? ??????? ????????? ???? ???? ?? ?????? ?????? ???? ???:

??????? ?? ?? ????? ???? ???? ???? ??????? a) ????? ????????? ? ??? ?????? ???? ?????? L ???? ????? ???? ???? ???? ? ?????? ????? ???. b) ??? ????? ???? ???? ?????? L ???? ????? ???? ??? ?? ????? ??? ????? ??? ? ??? ????? ?? ?????? ???? ?? ???? ?????? ???? ???.

????? ????? ???? ???? ?? ????? ???????? ?? ??????? ??? ??? ???? ???? ???????? ??????? ????? ???? ?????? ????????? ? ???? ????? ?? ??? ???? ???. The larger the ratio of the inner radius of the bent part to the plate thickness, the greater the rebound. ??? ??? ???? ??????? ?? ?????? ?????? ??? ??????? ???????? ???? ?? ??? ???? ?? ??? ???? ???? ????? ???????? ?? ??? ????? ??? ?? ????? ?? ??????? ?? ?????????? ??? ???? ??????. ?? ???? ????? ?????? ????????? ???? ?? ????? ?? ????? ????? ??? ?? ?? ???? ???? ??????? ?? ?? ??? ????? ???? ???? ?? ???: ???? ???? ??? ??? ?? ????? ????? ??? ????? ???? ??????? ??? ?? ?????? ???? ???? ?????? ??? ??? ???? ??? ??.

?. ??? ???? ????? ??? ???? ?????? ???? CNC ?? ???????? ?????? ???? ?????? ? ???? ?? ???????? ??????? ?? ????????? ??????? ????.

??? ???? ?????? ???? ?? ????????? ???? ? ?????? ????? ? ???? ?? ????????? ?? ???? ???? ?? ?? ?????? ????? ???.

???????? ?? ???? ?? ??????? ????? ???? ????? ???? ???? ????????? ??? ???? ?? ??? ?????? ??????? ????? ????.

?? ??? ????? ??????? ??? ???? ????? ???? ??? ???????? ????? ?? ?? ?? ???? ???? ????? ???.

2.1 ????? ???? ???? ?? ??? ????? ???? ?????? ? ????? ??????:

??????? ?? ?? ????? ??? ???? ???? ??????? ???? ?? ??? ????? ???? ?????? ? ????? ?????? ???? ????? ?? ????? ???? ????? ???? r1t. ???? ?????? ???? ?????? ?????? r1=(3-5) t ??????? ????? ??????? ? ??????? ???????? ????? ???? ???? ?? ????? 8 ????? ????? ????? ????? ????? ?? r18t ???.

2.2 ???? ???? ??? ???? ? ????? ???? ??????

???? ?? ??? ???? ? ????? ???? ?????? ???? ????? ?? ?? ??? ???? ???? ????? ???? r22t. ???? ?????? ???? ?????? ??????? r2=(5-10) t ??????? ????? ?? ??? ? ??????? ???? ????? ???? ???? ?? 8 ??? ???? ???? ????? ???? r28t. (Refer to the above figure)

?.? diameter ??? ????? ?? ??????? ????? ???

The inner diameter of the circular stretching piece should be taken as D d+10t, so that the pressure plate is pressed tightly without wrinkling during stretching. (Refer to the above figure)

???? ???? ??? ???????? ????? ?? ??? ??? ????? ????

The radius of the fillet between adjacent walls of a rectangular stretched piece should be taken as r3 3t. In order to reduce the number of stretches, r3 H/5 should be taken as much as possible, so that it can be pulled out in one go.

Requirements for the dimensional relationship between the height and diameter of a 2.5 round flange free stretching part during one-time forming

When forming a circular flange free stretching part in one go, the ratio of height H to diameter d should be less than or equal to 0.4, i.e. H/d 0.4, as shown in the following figure.

2.6 Thickness variation of stretched material:

????? ??????? ???? ?????? ?? ???? ??? ?????? ????? ???? ?? ???? ????? ???? ?? ???. Generally speaking, the original thickness is maintained at the center of the bottom, the material at the rounded corners of the bottom becomes thinner, the material near the flange at the top becomes thicker, and the material around the rounded corners of the rectangular stretched part becomes thicker.

?. ? ??? ?????????? ???? ?????????? ??????? ????? ??????

?????? ?? ????? ??????? ?????? ?????????? ??? ????? ??????? ???? ???? ???? ???? ??? ?? ????? ??? ?? ?????????? ????? ? ????? ????? ???????? ? ?????????? ????? ? ????? ?????????? ?????? ???? ???? ????.

Method for annotating dimensional tolerance of extended parts

???? ????? ???????? ?????? ?? ???? ????? ??? ? ???? ?????? ?????? ???? ?????????? ????? ??? ?? ?? ????? ??????? ??????? ??????? ???? ?? ???? ??????? ???? ?? ???? ???? ???? ???? ??? ?? ????????? ??? (GB) ? ????? ???????.

3. ??? ???? ?? ??? ????: ?????? ???? ??????? - ???? ??????? ??? ??????? ??? ???? ??? ?????? ?? ?????? ??????? ???????.

?????? - ?????? ??????? ?? ???????? ????? ?? ????????? ??????? ??????? ?? ???? ????? ?????? ? ????? ?????? ????? ???????.

????? ????? (????? ?????) ??????? ?????? ???? ????? ????? ?? ?????? ???? ????? ??? ??????.

3.1 ?????:

??????? ?????? ? ?????? ??????

?????????? ???????? ???? ???? ????? ? ????? ??? ????? ?? ???? ??? ??? ?????? ???????.

?. ? ?????

The method of forming blinds is to cut open the material using one edge of the convex mold, while the remaining parts of the convex mold simultaneously stretch and deform the material, forming a undulating shape with one side opening.

?????? ?????? ???? ?? ????? ??? ????? ??????

???? ???????? ??????: a4t; b6t；h5t；L24t；r0.5t。

????? ????? (????? ?????)

???????? ????? ?? ???????? ????? ???? ????? ? ?????? ?? ?? ??? ?? ????? ????? ????? ??????.

Sheet metal processing technology - riveting of other processed sheet metal accessories, such as rivet nuts, rivet bolts, rivet guide columns, etc. ???? @ @ 000

??? ?? ????????? ????? ??? ??? ??? ????

???? ??? ???? ???? 1:5? ?? ????? ????? ??????? ??. ?????? ?? ??? ??? ?1.5 ???? ?? ????? ??????? ???.

???????? ?????? ??? ???? - ?????? ?? ?? ????? ????????? ?????? ???? ??? ???? ?????? ????? ??????? ???? ?? "???????? ? ???????? ?????? ????????????? ???????" ???? ??? ? ?? ???????? ???????? ? ?????? ????? ???? ???. ????????? ??? ? ???????? ???????????? ????????? ???

???????? ?? ??????? ?? ??? ???? ??????? ??????? ???? ????????? ???? ?????? ? ??? ?? ?? ???.

???? ???? ???????????? ???? ??? ??? ???????????? ??? ????? ? ???? ???????? ???????????? ???? ??? 0.5 ?? 0.8mm ????. ?????????? ???? ??????? ? ??? ????.

2. ??? ?????? ????? ?????? ???? ?????? ????? ???? ?????? ?????? ?????? ????? ? ??? ?? ??.

?????????? ???? ?????? ?? ??? ??? ???? ???? ???????:

????? ??? ?????????? ????? ??????

In practical applications, when welding small parts, the data in the table below can be referred to.

???? ??????? ???????? ???? ?? ???????????? ??????? ????? ??? ??????? ???????? ?? ??? ????? ?????? ???? ?????? ???? ?? 40-50mm ????. ???? ??????? ??? ?????? ????? ??? ???????? ???????????? ???????? ?? 70-80mm

???? t? diameter joint solder d? ????? diameter joint solder dmin ? ????? ????? e ??? ???????? solder. ??? ???? ?? ????? ?? ???????? ????? ????? ??? ?????? ???????? ?????? ????.

Number of layers and material thickness ratio of resistance welding sheet metal

??? ??????? ???? ????? ???? ???? ?????? ??????? ?? ???? ???? ?? ?????? ?? ????. ???? ???? ?? ??????? ?? ???????? ????? ??? ???? ??? ?/? ? ? ????.

??? ???? ??? ?? ?? ???? ?? ???? ?? ?? ??????? ???? ??? ???? ???? ??? ?? ???. ??? ????? ????? ?? ???????? ????? ???. ??? ????? ?????? ????????? ?????? ?? ????????? ???? ?? ??? ??????. ???? ?? ???? ?? ???? ???? ???? ?????????? ?? ????? ????.

???????? ?????? ??? ???? - ??? ??????: ??? ?????? ??? ?????? ??? ???? ?? ?? ??? ?????? ????? ?? ???? ???? ??????????? ???????? ????? (??????? ?? ?? ???? ????? ??????? ??????????? ????? ? ??????????? TOX).

??????? ???????: ??? ??? ??????? ??????? ?? ????? ??????? ??????? ??????? ??????? ?????? ?? ???? ?? ???? ??????? ?? ???? ??? ??????? ?? ?? ?? ???? ??????? ??????? ??????? ??????? ???. ??? ??????? ?????? ?? ???? ????? ?? ???

2. ????? (???? ???? ?? ??? ?? ??? ???? ???) 3. ????? ? ???????: ?? ??? ????? ????? ???? ? ???? ?? ????? ????? ???? ?? ?? ?? ??? ???? ??????? ?? ???????.

?????: ????? ???? ???? ? ????? ??? ????? ??? ?????? ?????? ?????. ???? ??????? ???? ??? ? ????? ?????????? ?? ???? ????? ????? ???? ???.

4. ??????? ????: ???? ???? ?? ?? ???? ???? ???? ???? ?? ?? ???? ?? ????? ???? ?? ???. ??? ???? ??????? ???? ???? ?????? ??????? ?? ????? ???? ??????. ????? ?? ???? ?????? ???? ???? ??? ????? ?? ????? ??? ?? ????? ?????? ??????? ??? ?? ????? ???????. ??? ???? ??????? ?? ?? ???? ??? ????? ?? ????? ??? ???? ???????? ???? ?????? ??????? ? ??????? ????????? ??? ????? ??? ???? ????? ? ??? ???????? ???????? ?????? ???? ? ??????? ?? ?? ??? ????? ??????? ?? ???? ????? ? ???? ?? ??? ?? ?? ??? ? ?? ???? ???? ???????? ?????? ???? ?????? ??????. ??????? ?? ?? ????? ??? ???? ???? ??????:

???????? ?????? ???? ???? - ????? ??? ?? ????? ?????? ?? ??????? ? ????? ?????? ?? ??? ???? ???? ????? ???. ????? ??? ?????? ???? ??? ???? ???? ?????? ????? ?????????????? ??????? ???? ????? ???? ????? ???? ??? ???? ? ??? ?? ?? ???.

??? ?? ????? ??? ???? ??????? ???? ???? ??? ? ??? ?? ??? ???? ???? ?? ??? ???? ??? ???.

?????? ????: ?? ??? ??? ???? ??? ???? ???? ????: ????? ???? ? ????. ??????? ?? ?? ??????? ?????? ????? ???? ???. ?? ?????? ????? ?????? ????????????? ?????? ???? ???? ? ??????? ????? ?? ???? ??? ????? ??? ??? ??? ??? ???? ????? ????? ? ?????? ?????? ?? ??????? ???? ??????? ??????. ??? ?? ??? ????? ??? ?????? ??????? ??????.

???????: ???? ??? ????? ???????? ?? ???????? ?? ???? ????? ??????? ?????? ??? ???? ????? ????? ???????? ??? ???????? ??? ????? ??? ?? ?????? ???? ?? ?? ????? ????? ?? ????????? ?? ???? ??? ??????? ???.

2. ??? ??????? ?? ??? ??????? ? ??????? ??????? ???? ?? ??? ????? ?? ?????? ??????? ??? ??????? ?????? ? ???????? ??? ???? ?? ?????? ????? ???? ???. ???????? ?? ????? ?? ?????????????? ? ??????????? ??? ????? ???.

????? ?????????????? ?????? ???? ? ????? ???? ?? ?? ???? ???? ?? ??????? ??????? ?? ???.

The hot-dip zinc coating is thicker and can produce an iron zinc alloy layer, which has stronger corrosion resistance than electrogalvanizing.

?. ??????? ???: ??? ?????? ?????? ??? ????????? ? ????????? ?? ????? ?? ???.

??????? ??? ????????? ? ????????? ???????? ?? ??? ????? ??????? ???? ? ?? ????? ??????? ?????? ? ????????? ??????. ?? ???? ????? ?? ???? ????? ??? ???? ???????? ??? ??? ???? ????? ???? ?? ???? ???? ???? ? ?????? ????? ?????? ???????? ?????? ???????? ? ?????? ?????? ??? ????.

4. ????? ??? ???: ???? ??? ??????? ???? ? ????? ?? ????? ????? ??? ?? ???? ????? ?? ?? ?????? ?? ?? ?? ?????? ???? ??? ???. ?? ?? ????? ??????? ??????? ???? ?? ?????????? ?? ???? ? ????? ??????? ? ????????? ??? ??? ???? ???? ????????. ????? ???????? ?? ??? ??? ?????? ?? ????? ??????? ? ?????? ???? ???? ??? ??? ?? ????? ?? ?????? ?? ??? ????? ??? ????? ??? ?????? ???? ???????? ????????? ?? ??? ??????.

5. ??? ???? ?? ?????? ??? ????????? ????? ??? ??? ???? ???. ?????? ?? ??? ???? ????: ??? ???????? ????? ? ??? ??? ???????? ?????. ??? ???????? ????? ????? ??? ??????? ????? ??????? ??????? ??? ??? ????????? ??????? ???? ???? ??? ?????? ???? ???

??? ???? ?????? ???? ?? ??? ?????? ???.

?????? ?????? ????? ??? ????:

GBT13914-2002

GBT13915-2002-T Stamping Parts Angle Tolerance

GB-T15005-2007 ??????? ?????? - ??????? ??????? ???? ???? ????

GB-T 13916-2002 ??????? ?????? - ??? ? ?????? ???? ????????? ????

??????? ??????? ?????? ??? ? ?????? ?????? ?????? ??? ?????? ??????? ??????