In the electronic products, home appliances and furniture market has great competitiveness and replaceability. After the continuous electro-galvanized production line is degreasing, pickling, electroplating, and various post-treatment processes, it becomes an electro-galvanized product.

5. Hot dip galvanized steel sheet SGCC

Hot-dip galvanized steel coil refers to the hot-rolled pickled or cold-rolled semi-finished products.Galvanized steel sheet SECC

The base material of SECC is a general cold-rolled steel coil.

3. It is mostly used for springs with shrapnel and anti-EMI. SECC not only has the mechanical properties and similar processability of ordinary cold rolled steel sheets, but also has superior corrosion resistance and decorative appearance. Leveling and chemical treatment. Stainless steel SUS301

The content of Cr (chromium) is lower than that of sheet metal welding manufacturers SUS304, and its corrosion resistance is poor.

2..

4. Ordinary cold rolled sheet SPCC

SPCC refers to the continuous rolling of steel ingots into a coil or sheet steel of a desired thickness through a cold rolling mill. SPCC surface without any protection, exposed to the air can easily be oxidized, especially in the humid environment, the oxidation speed, the emergence of dark red rust, in the use of the surface to be sprayed, electroplated or other protection. For example, the computer chassis is commonly used SECC. It has excellent mechanical properties, no heat treatment hardening, and no elasticity. However, after cold working, it can obtain good tensile strength and hardness in stamping process, and its elasticity is good., and the steel sheet is plated with a zinc layer and then subjected to quenching and tempering. Stainless steel SUS304

One of the most widely used stainless steels is richer in corrosion resistance and heat resistance than Ni (nickel)-containing steels than Cr (chromium)-containing steels. SGCC material is harder than SECC material, poor in ductility (to avoid deep drawing design), thicker zinc layer, and poor weldability. After cleaning and annealing, it is immersed in a molten zinc bath at a temperature of about 460° C

What tools do you need to consider for sheet metal processing?

The first one is the mold identification. The current mold basically has laser-engraved relevant information, which is convenient for the worker to identify and sort the mold. The basic information includes the category number, tool tip angle, radius, V-shaped die groove, and length.

Second, the characteristics of the auxiliary tools, many forming molds include punch holders, push-button safety clips, quick-change 2V compression molds, and electric compression mechanisms, so the operator alone can change the mold very quickly. These systems also help operators to complete tasks more independently and more efficiently without compromising security.

Third, segmented molds, which produce the precision grinding segmented mold assemblies according to the length of the bending, do not need to take the time to aluminum laser cutting suppliers cut the molds to a certain length. Grinding the mold also reduces or eliminates the need for shimming. The segmented molds are lightweight and easy to handle, thus reducing manual labor and fatigue and reducing the likelihood of accidents. In order to extend the service life, the precision grinding mold is also hardened and surface-strengthened.

Fourth, the molds are stored, and the grouping of the molds with the cabinets can achieve the dual benefits of improved safety and improved material/tool ??management. With an orderly storage system, it is not necessary to look for tool shelves for a custom length mold. In addition, orderly storage allows managers to monitor the status of the molds more alertly, thereby ensuring high-quality inventory, recognizing mold wear and damage in a timely manner, and determining the manner and timing of mold changes.

How to deal with paint marks in stainless steel fabrication processing
Question one:
    The top paint around the trim section bulges into a ring.
This is due to the fact that the substrate is not completely hardened, resulting in absorption of the topcoat. The sandpaper is too thick and the topcoat uses an inappropriate diluent. Parts that have been repaired with putty or gooey have not been correctly primed or closed before being sprayed.
    Preventive methods: Polish the repaired part until the metal layer is exposed; use thinner for solvent test at the edge of the exposed paint layer, such as paint softening, the paint layer must be sealed. Putty and filling ash can only be used on exposed metal, not covered on the original paint surface. Use suitable sandpaper; make sure that all of the prepared materials are completely dry.
    Remedy: After the repair material is dry, smooth the damaged part, isolate it with the primer material, and then re-spray.
Question two:
    There are some round dots on the surface.
    This is due to the papillary line printed by the finger stencil. The substrate is not fully dried or cleaned before spraying; the pores/pinholes of the substrate are not polished or filled before spraying; the polymeric material is not properly segregated during the spraying process; Spray temperature changes, so as to produce polycondensation (shrinkage) effect.
    Preventive methods: Make sure all preparation materials are properly dried; carefully clean the substrate with a silicon-removing detergent; isolate the polyester material before applying the top coat; carefully grind the pinholes, or reapply the putty/filling ash/ Intermediate paint.
    Remedy: Polish the affected area and reapply it.

What are the standard specifications for stainless steel fabrication processing?
The following are the specifications of the process technology standard for stainless steel fabrication processing:
First, the purpose
The standardization of stainless steel fabrication processing, Chengdu mold processing, Chengdu stainless steel fabrication processing, and consistent terminology make it more adaptable to production and guide production.
Second, the scope of application
Company design, technology, production department.
Third, responsibility, rights
The formulation of the stainless steel fabrication process was formulated by the design department, and the technical department was proofread, reviewed and issued.
Fourth, the definition
The stainless steel fabrication process abbreviation process (hereinafter referred to as the process) is a part of the drawings, it can correctly reflect the parts in the production of various processing steps, and its processing methods; stainless steel fabrication technology usually has a specific reaction in the technical requirements.
V. Formulating the basis
Customer requirements, 2D and 3D drawings (including electronic files); and company equipment requirements.
Sixth, specific content
1. The process is the technical basis for the parts in the production process.
2. Each step and processing method of parts in the production process should have specific and specific reactions and requirements in the process.
3. Parts with special processing technology must be listed separately and marked separately in the process.
4, the specific embodiment of the process in stainless steel fabrication processing:
1), materials:
(1) Cold-rolled steel plate (SPCC): Electroplating (color zinc, white zinc), spray paint, and plastic spray for surface treatment.
2) galvanized sheet (SECC): used for surface treatment, spray paint, spray.
(3) Copper plate (brass plate, copper plate): The surface treatment is generally chrome plated, nickel plated, and is not used for surface treatment, according to customer's specific requirements.
(4) Aluminum plate (5052P): The surface treatment is generally chromate or oxidized.
(5) Stainless steel (SUS) can generally be divided into: drawing (hairline) stainless steel, mirror stainless steel, matte stainless steel, mirror, brushed stainless steel generally do not surface treatment, matte stainless steel can generally be used for sandblasting, painting and spray processing.
2), process flow
For stainless steel fabrication parts, it has its own processing, which is the process flow. Due to the structural difference of stainless steel fabrication parts, the process flow is also different

Sheet metal laser cutting is a new moldless cutting technique developed in recent years, such as laser impact cutting, laser bending cutting, laser marking machine, etc.

It can be used to bend shaped plates, formed hemispheres, spheres, S-shaped and other special-shaped cross-section parts. Or in the specific area of ??the tube for the

flange, shrinkage, bulging, such as the connecting angle pieces on the aircraft, partitions, profiles, brackets, skins and lamp shades on the car.
Before the laser impact cutting, the sheet metal is coated on the surface of the part—the process of “blackening the surface”. Then, the coating is covered with a

transparent material called a transparent layer, such as flowing water. When the laser is irradiated, through the transparent layer, the beam energy is initially absorbed

by the opaque coating layer, and a thin layer of coating material is evaporated. Evaporation of the coating material continues to absorb the remaining energy of the beam,

rapidly becoming a high pressure gas. Under the restriction of the transparent layer, the high-pressure gas generates the impact stress wave and acts on the workpiece to

deform the workpiece. At the same time, part of the stress wave from the high-pressure gas penetrates the surface of the workpiece, resulting in residual compressive

stress at a certain depth of the surface, which helps to strengthen the surface of the workpiece and improve the fatigue life. In addition, some of the stress waves pass

through the transparent material, which is called stress wave loss.
The future development of laser material processing technology will still be restricted by three aspects, namely laser processing equipment, process technology theory and

industrial applications. When the laser processing equipment is stable, reliable, matched, and highly automated, the technical reliability of the theoretical research of

the process technology is large, the work surface is widely developed, and the industrial application scope will be correspondingly expanded. Especially in developing

countries such as China, most laser material processing technologies are currently under basic research work and have not entered the stage of large-scale industrial

applications. They should attract sufficient attention in order to further promote the laser material processing technology towards high quality, high reliability and

intelligence. The development of sex, multi-function, high power and flexible automation.
Under the current economic situation, the development of many industries has been difficult. Naturally, there are many obstacles to the development of the gold and metal

processing industry. If we want to break the shackles of the current economic situation, we must grasp every step of our own development. In order to realize the

sustainable development of the industry, for the sheet metal processing industry, they want to occupy their own market in the existing market environment, then they must

know where they should change to achieve their own industry breakthroughs.
In the development process of the gold and steel processing industry, we must always put the improvement of processing technology first. At the same time, we must seize

the development trend of the market, cultivate professional core talents, and continuously improve the processing and manufacturing technologies. We must strive to develop

the direction of sheet metal processing toward larger scales such as automobile manufacturing and large-scale shipbuilding. We will continue to expand the market share of

sheet metal processed products and let more fields understand the performance advantages of sheet metal processed products. In addition, we must improve the packaging of

our products and strive to develop in the direction of advanced high-end products, so that market demand will continue to increase.
For the sheet metal processing industry, the key to the development at this stage is to strive to build its own brand, and try to avoid relying on other brands' labels. We

must strive to achieve self-brand development, so that more people realize the superiority of our own country's sheet metal processing products and rely on the strength of

their own brands to reduce the market share of foreign products in China.
In addition, the sheet metal processing industry still has to be modest in learning from others, actively learn from others' strengths, and improve self-innovation to

promote self-development. In addition, the attitude of service must be constantly changed. It is very beneficial to the development of the industry that the customer is

truly satisfied with the after-sales service and provides satisfactory service for the customer.