What is the amount of thinning of aluminum parts stamping and forming related to 5

The design of the stamping die, the hardness of the aluminum part is different from the steel, it is easier to deform, and its thinning amount is related to the gap of the concave and convex die, which can be fine-tuned according to the need, or the mold can be transformed.

The stamping die gap is generally determined according to the thickness of the plate, the type of the material, etc. The main factors influencing the clearance value are the material properties and the thickness of the material. The harder or thicker the material, the larger the gap value.

The design of the punching gap of the stamping die can be checked in the table, and it can also be selected according to the judgment of experience. For example, for parts with high requirements for dimensional accuracy and cross-sectional verticality, a small clearance value should be selected, and for stamping parts with low requirements for cross-sectional verticality and dimensional accuracy, a large clearance value should be used to reduce the punching force and improve the life of the stamping die.

Its value can also be calculated according to the following empirical formula:

Soft materials (e.g. aluminum): material thickness t 1 mm, blanking clearance c = (3% 4%) t

t = 1 3mm,,c = (5% 8%)tt = 3 5mm,c = (8% 10%)t hard material: t 1mm,c = (4% 5%)tt = 1 3mm, c = (6% 8%)tt = 3 8mm, c = (8% 13%)t

From a process design point of view, the maximum downgauging rate of aluminum sheet should not exceed 17%, and it is necessary to pay attention to the design of fillets, draft angles and the avoidance of bosses as much as possible.

For steel plate, because its formability is better than that of aluminum plate, the maximum thinning rate is generally controlled at no more than 20%. From the production point of view, due to the many problems of aluminum parts, the repair rate generally reaches 10%, and the repair needs to be invested in a special repair grinding room, and the repair cost is high. Compared with the wheel index, the repair of steel wax fuel matching plate does not require a harsh environment, and the cost of repair is much lower than that of aluminum plate.

Aluminum parts rebound large:

As a result, the size of aluminum stamping parts is difficult to control and adjust, and the size compliance rate of aluminum parts of the mold designed in Germany is not high, with an average of less than 70%, while the size compliance rate of steel plate molds can generally reach more than 98%.

From the mold point of view, due to the elastic modulus of aluminum.

Only 1 3 of steel, the elastic recovery after the aluminum plate punching fracture is more intense than the steel, the compressive stress of the section and the punch sidewall contact after the aluminum plate fracture is higher, the scratching is more intense, more heat is generated, because the aluminum plate itself is rotten and sticky, some materials on the aluminum plate fracture surface will adhere to the punch side wall, form built-up edge, cause the punching gap to become smaller, produce burrs, for this reason, need to carry out special design on the structure and surface of the die punch insert.

The problem of bending deformation and inconsistent width of the two ends when the thin aluminum sheet is stamped and formed may be caused by the following reasons:

1.Material selection: First of all, it is necessary to ensure that the thin aluminum plate selected meets the molding requirements. Choosing a high-quality thin aluminum sheet with good plasticity and consistency can reduce the possibility of bending and deformation.

2.Pressure and Process Parameters: Adjust the stamping process parameters, including pressure, speed, temperature, etc., to ensure that the thin aluminum sheet is properly controlled by force and temperature during the forming process. Excessive pressures or unsuitable process parameters may cause deformation of thin aluminum sheets.

3.Mold design and manufacturing: Check whether the design and manufacture of the mold are reasonable.

Optimize the structure and size of the mold to ensure that the mold can apply pressure evenly and avoid deformation caused by local over-tension or compression. At the same time, check whether the mold is damaged or worn, and maintain and replace it in time.

4.Processing technology: In the molding process, attention should be paid to controlling the positioning and fixing of the plate to avoid disordered movement of the plate in the molding. At the same time, the stamping process and sequence should be reasonably set to avoid deformation caused by excessive or non-judgmental and uniform processing.

5.Test and adjustment: Carry out testing and adjustment, and solve the problem of bending deformation and width inconsistency by adjusting the optimization of process parameters, mold design or processing technology. Constantly try and improve to find the most suitable molding process and parameters.

Finally, if the problem persists, it is advisable to consult with a professional stamping process engineer or manufacturer, who can provide solutions and recommendations for a more stamping substrate according to the specific situation.

With the development of the construction industry, the public wants to know more about the exterior wall of the building, the more lead banquet talks, aluminum plate is now a more popular exterior wall material, popular at the same time it also has some small shortcomings, such as the deformation of Huaibu, today to take you to take a good **.

There can be a variety of causes of deformation of exterior wall aluminum panels, and here are some common causes and remedies:

1.Temperature changes: Exterior wall aluminum panels can expand and contract at different temperatures, which can lead to deformation if this change is not handled properly.

Solution: Choose the right aluminum sheet material, use the right installation technology, and consider the use of temperature compensation devices.

2.Installation problems: Incorrect installation methods may also lead to deformation of the aluminum panels on the exterior walls. For example, not using enough support structure to support the aluminum plate during installation can lead to deformation.

Solution: Ensure proper installation methods and use appropriate support structures.

3.Material quality issues: Low-quality aluminum plates may be prone to deformation.

4.External force: It may be affected by wind, vibration or other external forces, resulting in deformation.

In order to prevent this: measures can be taken, such as increasing the thickness of the aluminum sheet, strengthening the support structure, using a wind-resistant design, etc.

5.Improper maintenance: If the exterior wall aluminum panels are not properly maintained and maintained, such as cleaning, repairing damage, etc., it can also lead to deformation.

Solution: Regularly inspect and maintain the exterior wall aluminum panels, and repair any damage in a timely manner.

Aluminum sheets can be affected by the heat-affected zone (HAZ) during the laser cutting process, resulting in bending and deformation after stamping forming. This could be one of the root causes of your experience with this issue. In addition, if the mold or punch is not set properly, it may also lead to a difference in the width of both sides after molding.

Here are a few common ways to solve the problem::

1.Adjust the machine: Check and make sure the machine is set up correctly, and perform maintenance and cleaning on the tuning machine.

2.Modify the mold: Modify the mold to ensure that the width of both sides is consistent and that it is more in line with the design specifications.

4.Use appropriate process parameters: Adjust the process parameters of laser cutting and stamping to minimize bending and distortion.

5.Increase the thickness of the metal sheet: Try to increase the thickness of the metal sheet to reduce bending and deformation.

6.Optimize the design with sheet metal software: The use of sheet metal software can optimize the cutting and bending of aluminum sheets, avoiding scrap while ensuring the accuracy of the finished product.

Unreasonable structural design (including unreasonable structure of product design and unreasonable dialing angle) and unbalanced ejection (ejection deformation).

Unreasonable water transportation leads to uneven cold and heat of the mold (product shrinkage and deformation) and unreasonable runner design (in foreseeable circumstances, some shrinkage deformation can be avoided in runner design).

The scope of this problem is too large, I will only explain the common defects and causes of aluminum alloy die castings: the causes and treatment methods of casting defects of aluminum alloy die casting products; Cluster Ruler.

surface casting defects;

1. Strain characteristics: the surface of the casting is a line-like strain mark along the direction of the mold opening, with a certain depth, and in severe cases, it is a whole surface strain; The molten metal is stuck to the surface of the mold, resulting in a shortage of material on the surface of the casting. Causes:

The surface of the mold cavity is damaged; There is no inclination or too small inclination in the direction of molding; ejection imbalance; Loose mold: the casting temperature is too high or too low, and the mold temperature is too high, resulting in the adhesion of the alloy liquid; The use of release agent is not good: the iron content of aluminum alloy composition is less than O 8; How to deal with too long or too short cooldown:

repair the surface damage of the mold; Correct the slope and improve the high finish of the mold surface; Adjust the top laughing bar to balance the ejector force; fastening molds; Control the reasonable casting temperature and mold temperature 1 80-250. Replace the release agent: adjust the iron content of the aluminum alloy; adjust the cooldown time; Modify the inner gate to change the direction of the molten aluminum.

2 Bubble characteristics: There are cavities formed under the raised skin of rice grains on the surface of the casting. Causes: The alloy liquid is filled too low in the pressure chamber, which is easy to produce entrapment and the injection speed is too high; Poor mold exhaust; The melt is not degassed, and the melting temperature is too high; The mold temperature is too high, the metal solidification time is not enough, the strength is not enough, and the mold is opened prematurely to eject the casting, and the pressurized gas expands; Too much release agent; The inner gate is poorly opened, and the filling direction is handed over.

The treatment method is changed to reduce the diameter of the pressure chamber and improve the filling degree of molten metal; Extend the injection time, reduce the injection speed of the first stage, change the switching point between low-speed and high-speed injection, reduce the mold temperature, and maintain thermal balance; Add exhaust grooves and overflow grooves to fully exhaust and remove oil and waste materials on the exhaust groove in time; Adjust the smelting process and carry out degassing treatment; Extend the mold retention time appropriately: reduce the amount of release agent.

In the face of the difficult period of continuous rise in raw materials, it is necessary to reduce costs by improving die-casting technology and controlling the production process to reduce unnecessary loss and waste to make up for the rise in material costs. In order to reduce the defective rate in the factory, it can be matched by good tapered flow channel design and increasing the proportion of die castings. A good runner design not only helps to achieve the ideal filling pattern, but also effectively reduces the air holding of the die casting and increases the acacia ratio of the good die casting.

Since the conical runner is lighter than other runners and does not require too much overflow, the proportion of die castings is increased, and the number of return stools can be reduced accordingly. On the other hand, group production is arranged in a continuous and smooth arrangement, where each production step forms a group and is arranged in a gradual and sequential manner. This can reduce the backlog of excess transportation and warehousing in the factory, and ultimately achieve cost savings in the entire production process.