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Why do automotive metal stamping parts cause tearing?

Are aluminum alloy heat sinks superior to other heat sinks? Most of the electronic products currently in use are equipped with an aluminum alloy heat sink. Its role is not only to build a complete and solid frame of electronic products, but also to help the internal CPU to dissipate heat. , To ensure a safe and secure working environment when electronic products are in operation.

This traditional heat dissipation method uses aluminum alloy to conduct internal heat to the air for heat dissipation. It has always had a good effect. However, with the development of technology, new types of radiators have appeared in our field of vision one after another, such as the wind. Cold radiators and water-cooled radiators. These active radiators have more obvious heat dissipation effects and are gradually being favored by many people.

Electrical Steel Rigid Conduit Nipple

In this case, recalling the traditional aluminum alloy heat sink, many people feel that the advantage is not obvious, and there is no need to use it. But is this really the case? Can traditional aluminum alloy heat sinks really only be eliminated in the face of new radiators? Let's analyze them in depth.

The operation of air-cooled radiators and water-cooled radiators relies on the drive of electric energy. The heat dissipation effect is indeed a little known, but their installation also depends on the reasonable application of the electronic product space. Today's electronic products are pursuing thin and light, and if you want to install air-cooled or water-cooled inside, not only the installation technology is very demanding, but it is not easy to pursue the thin and light volume, so the price will often be lower. Relatively high. Another more affordable and effective method is external air cooling, but in this case, the role of aluminum alloy heat sink is indispensable, because air-cooled heat dissipation is to dissipate the heat from the electronic surface to the air faster, if there is no aluminum alloy With the existence of the heat sink, the internal heat cannot be dissipated, and the air-cooled radiator has no practical value.

Are aluminum alloy heat sinks superior to other heat sinks? From the above, it is not difficult to find that although the new type of heat sink has advantages in terms of heat dissipation, it still has shortcomings in terms of convenience. Achieve better results.

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What is the calculation and quotation method for metal stamping parts

Electrical Steel Rigid Conduit Nipple

What is the calculation and quotation method for metal stamping parts? In metal stamping, the quotation of metal stamping parts is a particularly important thing besides production. The company's production is mainly for profit, and it needs to strictly control production. In addition, quotation is also an indispensable job. Only scientific quotation and high-quality products can make enterprises obtain good benefits. This article mainly introduces the method of quoting the processing cost of pressed parts for everyone to understand.

Development evaluation No matter what kind of process quotation is made, development evaluation must be carried out before quotation, which is one of the essential links. Development evaluation: stamping parts positioning, output forecast, technical feasibility. It also includes whether it can meet the technical requirements, whether the quality is available, whether the materials and outsourcing parts are available, whether the equipment has been used or newly purchased, and the company's current capabilities

And whether the manpower load is sufficient. The evaluation result determines whether the development will continue.

First, the quotation content of hardware stamping

  The quotation of stamping parts mainly involves the following aspects: material cost, profile mold fee, stamping die fee, fixture fee, stamping fee, processing fee (such as CNC processing, etc.), surface treatment (such as oxidation, coating, silk screen, spraying, surface Galvanized, etc.)

Second, itemized quotation of metal stamping parts

1 Material cost: unfold the part, calculate the length of the part, and then use the formula L(mm)*W(mm)*H(mm)*G/cm) *unit price (yuan/kg)*1.1-1.2)/10 to calculate the material cost .

2 Stamping mold fee: According to the shape of the part, estimate the mold area, place 5cm on one side margin, and place 3-5cm in height. The standard of the mold frame is inspected according to the mold size.

3 Printing costs: calculated by tonnage. (0.8≤1) yuan/60 tons, 1.2 yuan/80 tons.

4 Fixture fee.

5 Machining costs.

6 Surface treatment cost: oxidation 0.6 yuan/dm; painting; screen printing; spraying; surface galvanizing.

7 Gross profit: control between 20-30%.

Third, the processing fee quotation for metal stamping

1 Confirm the blank price of the product. The weight of the blank can be obtained by the width, step and thickness of the group blank. According to the selling price of this material in the market, we can get the material price of the product.

2 Confirmation of pulse charge, a product is composed of multiple processes, and each process can use a different tonnage press. The price of beer machines of different tonnages is roughly 16T-0.06, 25T-0.08, 35T-0.1 yuan, 45t-0.12 yuan, 60t-0.15 yuan, 80t-0.2 yuan, 110t-0.25 yuan, 160t-0.30 yuan, 200t- 0.50 yuan, 200t (double shaft)-0.60 yuan, 250t (

Dual axis) -0.90 yuan.

3 Total price = stamping cost per ton of material, but please note that the scrap rate in production is very high, and post-processing, electroplating, brushing and screws should also be paid attention to after production. Studs need to be considered.

Let's explain here about the calculation and quotation methods of the hardware stamping parts, so our quotation money needs to be evaluated to make a reasonable quotation.

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What are the types of precision metal stamping parts

1. Automobile parts: mainly include automobile structural parts, automobile functional parts, automobile lathe parts, automobile relays, etc.

2. Electronic parts: mainly include connecting devices, connectors, brush parts, electrical terminals, elastic parts, etc.

3. Home appliance parts: Mainly include major home appliances parts, such as color tube electron gun parts, and small home appliances parts, various structural parts and functional parts.

4. IC integrated circuit lead frame: mainly includes discrete device lead frame and integrated circuit lead frame, etc.

5. Motor core: mainly includes single-phase series motor core, single-phase household motor core, single-phase shaded pole motor core, permanent magnet DC motor core, industrial motor core, plastic stator core, etc.

6. Electrical iron core: mainly includes E-shaped transformer core, EI-shaped transformer core, I-shaped transformer core, and other transformer core chips.

7. Heat exchanger fins: mainly include industrial heat exchanger fins, household heat exchanger fins, and automobile heat exchanger fins.

8. Other parts: mainly include instrument and meter parts, IT parts, acoustic and camera parts, modern office parts, and daily hardware parts.

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What should metal stamping workers pay attention to?

1. Maintain a good mental state   When operating the punch, you must maintain a good mental state, and you must not operate the punch when the mental state is not good. If you have any concerns, you must ask the factory for leave or transfer to another position.

2. Ensure concentration   In the process of work, you can't talk to others, let alone look at your cell phone or make calls. Nor can they engage in anything that has nothing to do with operating the punch.

China Junction Boxes Manufacturers

3. Calm attitude   When the material is not discharged smoothly or the product is stuck in the mold, you must calmly stop the machine and do not be impatient.

4. It is strictly forbidden to enter the work area by hand   Ninety percent of accidents involving punching machines are caused by workers entering the work area with their hands. Under no circumstances should their hands enter the work area. This is the first guarantee of safety for stamping workers! Manual safety tools must be used!

5. Learn company safety regulations and operation manuals   Frequently learn the safety production specifications and systems formulated by the company and establish safety production awareness.

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What are the commonly used stamping materials

Commonly used stamping materials usually include: various steel plates, stainless steel plates, aluminum plates, copper plates and other non-metallic plates. The classification of steel plates (including strip steel):

1. Classification by thickness: (1) Thin plate (2) Medium plate (3) Thick plate (4) Extra-thick plate 2. Classification by production method: (1) Hot rolled steel plate (2) Cold rolled steel plate 3. According to surface characteristics Classification: (1) Galvanized sheet (hot-dip galvanized sheet, electro-galvanized sheet) (2) Tin-plated sheet (3) Composite steel sheet (4) Color coated steel sheet 4. Classification by use: (1) Bridge steel sheet (2) Boiler steel plate (3) Shipbuilding steel plate (4) Armor steel plate (5) Automobile steel plate (6) Roof steel plate (7) Structural steel plate (8) Electrical steel plate (silicon steel sheet) (9) Spring steel plate (10) Others

What we usually call stamped steel plates mostly refers to thin steel plates (strips); the so-called thin steel plates refer to steel plates with a thickness of less than 4mm, which are divided into hot-rolled plates and cold-rolled plates.

Hot rolling uses slabs (mainly continuous casting slabs) as raw materials. After heating, the rough rolling mill and the finishing mill make strip steel. The hot steel strip from the last rolling mill of finishing rolling is cooled to a set temperature by laminar flow, and then coiled into a steel strip coil by the coiler. The cooled steel strip coils are processed into steel plates, flat coils and flat coils according to the different needs of users through different finishing lines (flattening, straightening, cross-cutting or slitting, inspection, weighing, packaging and marking, etc.) Slitting steel strip products. To put it simply, a steel billet is heated (that is, the red hot steel block in the TV) after several passes, and then trimmed to form a steel plate. This is called hot rolling.

Cold rolling: Hot-rolled steel coil is used as raw material, after pickling to remove oxide scale, cold rolling is carried out. The finished product is hard-rolled coil. Cold work hardening caused by continuous cold deformation increases the strength, hardness and toughness of the hard-rolled coil. Plastic index declines, so the stamping performance will deteriorate, and it can only be used for simple deformed parts. Hard rolled coils can be used as raw materials for hot-dip galvanizing plants, because hot-dip galvanizing lines are equipped with annealing lines. The weight of the rolled hard coil is generally 6 to 13.5 tons, and the steel coil is continuously rolled on the hot-rolled pickled coil at room temperature. The hard-rolled sheet has high hardness (HRB greater than 90) and poor machining performance because it has not been annealed. It can only be processed with a simple directional bending process (perpendicular to the coiling direction) of less than 90 degrees. Simply put, cold-rolled plates are processed and rolled on the basis of hot-rolled coils. Generally speaking, it is a process of hot rolling-pickling-cold rolling.

Since cold-rolled sheets are processed from hot-rolled sheets at room temperature, although the rolling process will heat up the steel sheets, people still call cold-rolled sheets produced by this production process. Because the hot-rolled sheet is continuously cold-deformed, the cold-rolled sheet has poor mechanical properties and high hardness Conduit Fittings Manufacturers. It must be annealed to restore its mechanical properties, so the cold-rolled sheets we usually use are annealed, so the hardness is lower than that of the hot-rolled sheet, and the toughness is better than that of the hot-rolled sheet, and the surface quality is also good many! The ones that have not been annealed are called rolled hard coils, which are generally used to make products that do not need to be bent or stretched.

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What are the reasons for turning and twisting of metal stamping parts?

With the refinement of industrial electronics, various industries have higher and higher requirements for metal stamping parts, including the stamping shape. In the process of punching the shape, it is easy to produce turning and distortion phenomena, which affect product quality. So why do these situations occur? Let’s talk about Shenzhen Xinquanxin Hardware.

1. Add strong pressure function. That is to increase the size of the press part of the unloading insert (normal unloading insert thickness H+0.03mm) to increase the pressure on the material on the die side, so as to prevent the stamping part from turning over and twisting during punching non metallic conduit.

2. Reasonable mold design. In the progressive die, the arrangement of the blanking sequence may affect the forming accuracy of the stamping parts. For the blanking of small parts of stamping parts conduit clamp, generally a larger area of ??punching is arranged first, and then a smaller area of ??punching is arranged to reduce the impact of the punching force on the forming of the stamped part.

3. Beveled or curved at the end of the punch blade. This is an effective way to reduce cushioning power. By reducing the buffer cutting force, the tensile force on the side material of the die can be reduced, so as to achieve the effect of suppressing the turning and distortion of the stamping parts.

4. In daily mold production, care should be taken to maintain the sharpness of punching convex and concave die cutting edges. When the punching edge is worn, the tensile stress on the material will increase, and the tendency of stamping parts to turn over and twist becomes greater.

5. Hold down the material. Overcome the traditional mold design and structure, open a material-containing gap on the discharge plate (that is, when the mold is closed, the discharge plate is attached to the concave mold, and the gap between the discharge plate and the concave mold where the material is contained is the material thickness t-0.03 ~0.05mm). In this way, the discharge plate moves smoothly during stamping, and the material can be compressed. The key forming part, the unloading plate must be made into a block-type structure to facilitate the solution of the wear (compression) loss of the pressing part of the unloading plate caused by long time stamping, and the material cannot be compressed.

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Ningbo Xiatao Plastic Industry

Ningbo Xiatao Plastic Industry Co.,Ltd was established in 1998,and locates in the beautiful seaside city-Xiangshan,Ningbo.we are a creative and professional manufacturer that specializes in plastic conduit fittings,plastic pipes,zinc die-casting fittings,steel and malleable products. To control the quality,we have passed ISO9001:2015 and TS16949:2002 quality systemapproval,and some of the products got the approval of UL,CSA and ROHS etc. Xiatao has a team of skillful and experienced,which help customers to design reliable and effective solutions.Weadhere to"customers first,hearty service"principle,providing with high-quality.professional technique,and perfect after-sale service for our customers.

Ever since its foundation,Xiatao Plastic Industry attracted many talents and harvest a lot of valuable wealth.We attaches great importance to the employees' development,people oriented and attaches great importance to the talent strategy,the enterprise will arrange good staffs who have many years experience for training when the new employee orientation. Improve the ability to work better by helping employees to promote employees and the common development of the enterprise.