51吃瓜

Sheet Metal Processing is a comprehensive cold working process for metal sheets (usually below 6mm), including shearing, punching, bending, welding, riveting, mold forming, and surface treatment. Its prominent feature is that the thickness of the same part is consistent.

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. ?????? ????? ???????????: ???? ????????? ????? ?? ??????????? ?????? ???????, ?? ????? ???? ???????? ????? ??? ???????? ?????, ??????? ???? ????? ????? ??????????? ??? ?????? ?? ????????????????? ?????? ??? ????, ??? ?? kwalitet ???? ?? ??????? ??? garanti??. ??? ???????? ????????????? ??? ????? ??? ??? ???????? ?????? ??? ???. ?????? ???????

?????????? - ???????, ????????, ?????????: ??????? ??????, ????????? ??????, ???”

????????: riveting, tapping, etc

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

????

Sheet metal processing technology - The main cutting methods for sheet metal include numerical punching, laser cutting, shearing machines, and mold cutting. CNC is currently a commonly used method, and laser cutting is mostly used in the sampling stage (or can also process stainless steel sheet metal parts), with high processing costs. Mold cutting is mostly used for large-scale processing.

??????, ??? ????? ?????????? ?????? ?? ?????? ??? ????? ?????? ??? ???????? ????????

Numerical punching, also known as turret CNC punching machine, can be used for cutting, punching, stretching holes, rolling ribs, punching blinds, etc. Its machining accuracy can reach+/-0.1mm.

The thickness of the CNC machinable sheet metal is:

????? ?????? ??? ???????????? ????? 4.0mm

Aluminum plate 5.0mm

????????? ?????????? 2.0mm

There is a minimum size requirement for punching. ??? ???????? ???? ???? ??? ??? ???????? ?? ??? ??????? ???? ??? ?????, ?? ?????????? ??????????????? ???? ??? ?????????, ??? ?? ???????? ???? ??? ??? (?? ??????? ??? ??? ???? ??????)

2. ?????????? ??? ????? distanc? ???? ?? ???????? ????? ??? ??? ??????? ?????????? ????? ??? ???????? ????? ???? ??? ??????? ????? ???? ??? ??????? ????? ???? ??? ??????? ????? ???? ??? ??????? ????? ???? ??? ??????? ?????, ??? ??? ???? ??????? ?????????? ??? ??? ??????????, ??? ???? ???? ???? minder ??? 1.5t. (?? ?????????? ??? ??? ???????? ??????)

3. ??? ???????? ?????, ??? ??? ???????? ??????????? ?????? ??? ???????? ????? ??? ?? ????? ??? 3T, ??? ???????? ?????????? ?????? ????? ???????? ????? ??? 6T, ??? ??? ???????? ????? ?????????? ?????? ??? ???????? ????? ??? ??? ???????? ????? (??? ??????) ??? 3T+R

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

Sheet metal processing technology - Forming sheet metal mainly involves bending and stretching the sheet metal.

1. Sheet metal bending 1.1 Sheet metal bending mainly uses bending machines.

??? ???????????????? ???? ??? ???????????????;

One fold:+/-0.1mm

Half Fold:+/-0.2mm

Over 20% discount:+/-0.3mm

The basic principle of bending processing sequence is to bend from inside out and from small to large. Special shapes should be bent first, and the previous process should not affect or interfere with the subsequent processes after forming.

1.3 ??????? ??????? ????? ????????:

????:

1.4 ??????? ??????????????? ???? ?????? ????:

??? ???? ????????? ??? ???????????, ?? ???? ?????????? ????? ?????? ??? ??? ????????????? ???????? ??? ????????, ??? ?????? ??? ??? ?????????? r, ??? ??? ????? ??? ??? ???????????? ??? ????? ??? ??? ??????????; ??? ??? ???????????????? ???? ??? ?????????? ???????????? ?? ???????? ?? ???????????? ?????????? ???? ??? ????????, ?????? ??? ????????????? ???? ????. ???????, ??? ??????????????????? ???? ??????? ????? ???? ??? ???????? ??????????????? ???? ?????????? ????? ??????????? ??? ??? ??????????? ????? ??? ??? ??? ??????? ??????

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

??? ????? ???????? ?????? ??? ?? ??? ????????? ???????? ???? ??? ??????? ????, ??? t ??? ??? ????? ???????? ???? ??? ??????????.

?? ????? ????????? ???? ??? ???????????? ??? 1.5:

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

??? ???? ????? ????? ?2t ???? ??? ???????????? ??????? ???, ??????? ??????????? ?? ????????????? ??? ??? ??????? ???????? ?? ?? ??? ??????? ???? ???? ?? Or, after processing shallow grooves in the bending deformation zone, perform bending.

1.6 ??????? ?????????????? ??????????? ??? ??? ???????? ?? ??? ??? ???????? ?????

??? ??? ????? ?? ???? ??? ?? ?????? ?????, ??? ??? ??????? ??? ???? ??? ????: h=(2-4) t> paper size

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

?????????? distance: ????? ??? ????? ?????? ??? ?????? ???? ??. ??? ????????? ???? ??? ????? ???? ???? ????? ??? ????????? ????????????? ???? ?? ???????????? ?? ????? ???? ??? ???? ????? ??? ?? ???????? ???? ??? ?????????? ?? ??? ?????????? ??? ??? ??????? ??????

1.8 ?????????????????? ????? ??????????? ?????????:

??? ??????????? ????? ???? ??? ??????????? ???? ???? ?????????? ??? ????????? ???? ????????? ???????????????. ??? ??? ?????? ?? ????? ????? ??? ??? ????? ?????????, ????? ?? ???????? ??????? (Figure a), ????? ?? ???????? ??????? (Figure b) ??? ??? ???????, ????? ?? ???????? ????? ??? ????? ?????? (Figure c). ??????????? ?? ??????????????? ??? ??? ?????: SR ???: Slot depth Lt+R+k/2.

1.9 ???????? ???? ??????????????????? ????? ??????? ?????????? ????????

1.10 ????????? ??????????? ????? ???? ????????? ?????? (???? ???):

?? ?????? ????? ???? ???? ????? ????????? ?????? ??? ????? ??? ??? ?????? ???? ??? ??????????. ?? ????? ??? ??? ??? folgje???? ??????, ??? ??? ???????? ???? ???? ?? ???? ????? ???? ?3.5t+R ??????????.

?????? ???, ??? t ??? ?????????????? ???? ???????, ??? R ??? ??? ???????? ????????? ???????????????? ???? ??? ??????? ???????? (?? ??????? ??? ????? ??? ??? ????????? ??????) ????? ???

1.11 ???????? ?????????????????? ?????:

?? ?????? ?? ?????????????????? ???? ????? ???? ??? ??? ?????? ??? ??????????? ?? ?????????? ???? ????? ???? ??? ??? ?????????, ???? ??? ???????? ?????????????????? ????? ???? ??? ??? ???????? ????? ????? ???? ????? ???? ?????? ??? ???, ??? ???? ???? ?? ???????? ????? ?? ?? ??????????????????? ?? ???????????? ??мулятив? ???? ??? ?????? ??????????kwal

When labeling the dimensions of bent parts, consideration should be given to processability:

?? ??????? ??? ??? ??????????, ?) ???????? ?????? ??? ??????? ????????, ??? ??? L ??????????????????? ????? ?? ??????, ??? ??? ???????? ??? ?? ???????? ????????. b) ??? ??? ?????????? ???????? ????? ????????? L ??? ????, ?? ??? ?????? ?? ????? ?????? ??? ?????? ???????? ?? ?????, ????? ??? ??????????? ?? ????????.

?? ????? ???? ??????????? ???? ????? ??? ??????????? ??? ????? ??????, ???? ?? ???????? ???????????? ??? ??? ??????????, ???? ????????, ??????? ???????, ??? ?????????? ??????? ??? ?? ?????? ????????? ???? ??? ????????? ???????? ???? ??? ?????? ???? ??? ??? ?????????????, ??? ?????? ????????? ????? ????????????. The method of suppressing rebound from a design perspective, such as the rebound of bent parts, is currently mainly avoided by manufacturers during mold design by taking certain measures. ??? ??? ???????? ?????, ????????? ?????? ????????? ??? ??? ??????? ??? ???????? ??? ??????????????, ??? ??????? ??? ??? folgje?????? ?????: ????? ???? ??? ??? ??????? ??? ????? ???? ????? palielināt ?? ???????? ??? ??? ?????????, ????? ???? ????? ??????? ???????????.

2. Sheet metal stretching The stretching of sheet metal is mainly completed by CNC or conventional punching, requiring various stretching punches or molds.

??? ??????? ???? ??? ???????? ???? ???? ???? ????? ????? ??? ????????, ??? ??????, ??? ???? ???? ????????? ??? ???? ????? ??? ??? ??? ??????.

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

????? ??????? ??? ????????????? ??????????-????????, ??? ???? ???????? ???????????? ?????? ??? ?? ????? ??????????.

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

?? ??????? ??? ??? ???????? ?????? ??? ???????????? ???????? ???? ???? ?????? ????? ????: r1=(3-5) t ??? ???? ???????, ??? ??? ?????? ??????????? ?????ус ???? ???? ?????? ????? ?????? ??? 8 ??? ??? ???????? ???? ????, ???? ???

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

??? ??????? ???? ??? ??????? ????? ??? ?????? ??? ??? ???? ???? ??? ???????? ???? ???? ???? ?????? ??? ????? ???? ?? ???????? ???? ??? ?????, ?? ?22t. ?? ???? ??? ?????????? ???????? ???????, ??? ???????? ??????? r2=(5-10) t, ??? ??? ??????? ?????????????? ???? ???? minder ??? ????? ?????? (?????????? ???????? ????)

2.3 Inner cavity diameter of circular stretched parts

?? ????????? ???????? ??? ??? ???????? ??????????? ???? ???? ????? ??????? ??? D d+10t, ????? ??? ??? ??????? ????? ??? ????? ????????? ??? ???????? ???? ????????. (?????????? ???????? ????)

2

??? ??????? ???? ??? ??????? ????? ??????????? ???? ??? ?? ?????????????? ???????????? ???? ???? ??? ??????? ?? r3 3t. ?? ???????????? ??? ???? ???? ??????, r3 H/5 ???? ??? ??????? ??? ??? ??? ??????, ????? ?? ??? ????? ??????? ??? ????

??????????? ????? ?? ???????????? ?????? ??? ??? ??? ?? ???????? ???? ?? 2.5 ???? ????????????????? ???? ???? ??? ?????? ?????????

??? ?? ????????? ?? ????????? ?????? ?????? ?????????? ???? ??? ???? ????, ??? ??? ??????????? ???? ??? H ?? ???????? d ???? ???? ?????? ????? ?????? ?? 0.4, ?? ????? ??? ??? ??? folgje????? ?????.

2.6 ??????? ?????????? ???? ?????? ?????????:

?? ??????? ???? ???????? ???????????? ?????????? ????? ?? ?????????? ????? ???? ?????????? ??? ???? ????. ?????????? ??????, ??? ???????? ???? ????? ??????? ??? ??? ?????? ??? ??? ?????, ??? ?????????? ???? ?? ????????? ??? ??? ??? ????? ????? ?????, ??? ?????????? ???? ??? ?????? ???? ??? ????? ????? ?????, ??? ??? ?????????? ????? ?? ????????? ??? ??? ??? ?????????

2.7 ???????????????????? ????? ??????????????????? ???? ?????? ???????

??? ???????? ???????????? ?????????, ????? ?? ????????? ??? ??? ????????????????? ???? ?????? ???????????? ???? ?????? ????????? ?????? ?????? ??? ????????? ?????????,

2.8 ????????? ????? ???????????? ???????????? ?????? ???? ?????? ???????

??? ????????? ???????? ???? ??? ???????????????????? ???? ??? ????????? ???? ??? ??? ????????????????????? ???? ??? ??????????? ???????? ???? ??? ???? ???? ????? ??????? ????????? ????????????? ????????????? ?????????????, ??? ?? ????????????? ??????? ???? ??

3. ?????? ????????? ??? sheet metal: Reinforcing ribs - Pressing ribs on flat metal parts helps to increase structural rigidity.

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

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

reinforcement

???????????

The maximum dimensions for convex spacing and convex edge distance are selected according to the table below.

3.2 ???????

??? ?????????????????? ?????? ??? ?? ?????? ??? ?????????? ??? ?? ????? ???? ??? ???????????????, ???? ?? ?????? ????? ???? ??? ??????????????? ?????????? ?????? ??? ?????????? ??? ??????????, ???? ????????? ?

??? ????????? ???????? ???? ??? ????? ????? ??? ??? ??? folgje????? ?????

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

3.3 ????????? ??? ????? (???????? ?????)

There are many forms of hole flanging, and the common one is to machine the inner hole flanging of threads.

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

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

Sheet metal thickness t< ???? 1.5 ???, ??? ??????????? ????? ??? ??????. ??? ??? ??????????? ??????? ??? t1.5, ????? ???? ???????? ????????

Sheet metal processing technology - When welding in the design of sheet metal welding structures, it should be implemented to "symmetrically arrange welds and welding points, and avoid intersection, aggregation, and overlap. Secondary welds and welding points can be interrupted, and main welds and welding points should be connected."

?????? ???????? ?????? ??? sheet metal ??? ????? ???? ????? ????????, ????????? ????????, ??.

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

2. ?? ???????? ?????????? ??? ??????? ???????? ???? ???? ?????, ??? ?????????, ???????????, ??.

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

Distance between resistance solder joints

??? ???????????? ????????????, ??? ???? ????????? ????? ?????, ??? ??? ????? ?? ????? ??? ??? ??????? ??????.

??? ??? ??????????? ????????? ???????, ??? ??? distancy ????? ??????? ???? ??? ?????????? ??????, ???? ??? ????????? ??? 40-50mm. ????? ??? ??????????? ???????, ??? ??? distancy ????? ??

?????? ???????? ? ?, ??????? joint ???????? d, ??????? ??????? joint ???????? ????, ??? ??????? distance e ????? ????? ???? ????? ???? ?????. ??? ???? ????? ??? ?? ???????????? ??? ??????? ?????????, ????? ????? ???

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

?? ????????????? ????? ??????????????????????? ??? ???????????? 2 layers, ??? ?? ?????? 3 layers. ?? ?????? ??????????? ???? ???? ????? ???? ??? ???????? ?????? 1/3 ??? 3.

??? ?? ????? ?? ???? ?? ????? ???????????, ???? ????????????? ????????? ??????????? ???? ???? ???????????? ??????. ??? ?? ??? ????????, ???? ??? ??? ??????? ??????????. ??? ?? ??? ??? ????????, ???????? ????? ????? ???????? ???

Sheet metal processing technology - Connection methods: This mainly introduces the connection methods of sheet metal during the processing, including rivet riveting, welding (as mentioned above), hole drawing riveting, and TOX riveting.

???? ?????: ??? ????? ??? ???? ??? ???????? ?????? ??? ?? ?????? ????, ????? ??????? ?? ????? ????? ????? ??? ???? ?????? ??????? ???? ?? ?????? ????. ?? ??????????? ??????????? ????? ??????? ??? ??? ?????:

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

Superiority: The extraction hole and its corresponding sinking hole have positioning function. ??? ??????????? ??? ????, ??? ??? ??????????? ??? ????? ???? ????? ??? ???? relatively ????.

4. TOX ?????: ????? ??? ??????? ???? ??? ??? ??????????? ???? ?? ????? ???????????. ?????? ???????? ???????, ??? ??? ?????????? ??? ?????? ???? ??? ???????? ????? ?????. The result is a circular connection point without any edges or burrs, which does not affect its corrosion resistance. Even for plates with a coating or spray paint layer on the surface, the original rust and corrosion resistance characteristics can be retained because the coating and paint layer can also retain the original rust and corrosion resistance characteristics, as the coating and paint layer also deform and flow together. ??? ?????????? ??? ?????? ??? ????? ???? ??? ??? ??? ????? ???? ??? ????????????????, ???? ????? TOX ?????? ???????. ????

Sheet metal processing technology - surface treatment can provide anti-corrosion protection and decorative effects on the surface of sheet metal. ?? ????? surface treatments for sheet metal include powder spraying, electrogalvanizing, hot-dip galvanizing, surface oxidation, surface drawing, screen printing, etc.

????? surface treatment of sheet metal, oil stains, rust, welding slag, etc. ???? ??? ???? ???? ??? ?????????? ???? ??? sheet metal.

Powder spraying: There are two types of surface spraying for sheet metal: liquid and powder paint. The commonly used one is powder paint. By spraying powder, electrostatic adsorption, high-temperature baking and other methods, a layer of various colors of paint is sprayed on the surface of the sheet metal to beautify the appearance and increase the anti-corrosion performance of the material. ?'??? ?? ?????????? ???? ???? ???? ?????????? ???? ??????????????.

??? ???: ?? ??? ???? ?????? ??????????????????? ??? ?? ??????? ???? ?pr??? ???? ??????? ????????????, ????? Sheet metal ??? ??? ???????? ?????? ???? ??? ???????? ???????? ???? ???? ?pr??

2. ??? ?????????? ???????????? ??? ????-dip ????????????? ?????? ?????? ??? ?? ??????????? ????? ?????????? ?????-??????????? ???????????????, ??? ????? ?????? ?? ????? ???? ??? ??????????? ??? ???????. ????????????? ??? ????? ??????? ??? ???????????????????? ??? ????-dip ?????????????.

??? ???????? ???? ??????????????????? ??? relatively ?????? ??? ????, ??? ?? ??? ??????????? ?????, ????? ??? ????? ??????.

??? ?????dip ?????? ???????? ??? ??????? ??? ??? ????????? ?? ???????? ?????? ?????? lag, ????? ??? ??????? ?????????? ??????? ??? ??????????????????????.

3. ?????????? ??????????: ??? introduces mainly the surface anodizing of aluminum and aluminum alloys.

?? ?????????? ??????????? ???? ????????um ??? ????????um ?????????? ??? ????? ????????? ??? ????????? ??????? ??? ?????????? ?????????????. ??? ??? ???????? ?????, ??? ??? ????? ??????? ??? ?????????? ???????????? ???? ??? ?????????? ???? ??? ??????????, ???? ??? ???? ????? ??? ????? ?????????, ??? ???? ??? ????????? ????????? ??? ???????? ????????? ??????

4. ?????????? ????????????: ????? ??? ???????? ?????? ?? ?????????? ??? ?????? ?????????? ??? ??? ????????????? ??????, ??? ?? ????????? ??????? ?????? ??? ??????. ????????? ???? ?? ???????, ??? ???????? ???? ???? ?? ?????????? ??? ?????? ????????????, ??? ???? мар??? ???? ??? ?????????? ??? ??? ????????. ?? ??????? ??? ?? мар ??? ???????????????????????? ???? ???????????? ????? ?????????? ????? ????????um ???????????.

5. ?????? ???? ??? ?? ???????? ???? ???? ?????????? ???????????????? ????????????????? ??? ??? ?????????? ????????? ???? ???????????. ????? ?????? ???? ???? ???????????? ?????????,

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

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

GBT13914-2002 ???????????? ???????? ????? ????????? ?????

GBT13915-2002-T ?????????????? ??????? ????????????

GB-T15005-2007 Stamped parts - Limiting deviations without specified tolerances

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

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