Press Brake Tool

Bending machine molds are divided into upper and lower molds, which are used for sheet metal stamping and separation. The mold used for forming has a cavity, while the mold used for separation has a cutting edge.

Generally, T8, T10, T10A, and even better 42CrMo materials are used, which mainly require high strength, high toughness, and good wear resistance. Cold work die steel is selected Cr12MoV is a very good material The performance can meet the requirements, the process performance is good, and the price will be higher. 42CrMo is a high-strength alloy quenched and tempered steel with high strength and toughness Can work below 500 degrees Celsius

1. Connect the power supply of the bending machine, turn the key switch, press the oil pump to start, and the bending machine oil pump starts to rotate. At this time, the machine has not yet started working.

2. Travel adjustment requires a trial run before officially starting the bending work using the bending machine mold. When the upper mold of the bending machine descends to the bottom, there must be a gap of plate thickness. Otherwise, it will cause damage to the mold and machine. The adjustment of the itinerary also includes electric quick adjustment and manual fine adjustment.

3. The selection of the slot for the bending machine mold generally requires selecting a slot with a width 8 times the thickness of the plate. If bending a 4mm sheet metal, a slot of about 32 should be selected.

4. Check the overlap and firmness of the upper and lower molds of the bending machine; Check whether each positioning device meets the requirements for processing. Regularly check the overlap of the upper and lower molds; Whether the indication of the pressure gauge complies with the regulations.

5. When bending the sheet metal, it must be compacted to prevent the sheet metal from lifting and injuring the operator during bending.

6. When adjusting the sheet metal pressing mold, the power must be cut off and the operation must be stopped before proceeding.

7. When changing the opening of the lower die of the variable bending machine, no material is allowed to come into contact with the lower die.

8. It is prohibited to use bending machine molds to bend excessively thick iron plates or quenched steel plates, high-grade alloy steel, square steel, and plates that exceed the performance of the plate bending machine, in order to avoid damaging the machine tool.

9. Turn off the bending machine and place wooden blocks on the lower mold below the oil cylinders on both sides to lower the upper sliding plate onto the wooden blocks. Exit the control system program first, and then cut off the power.

When installing the bending machine mold, it is necessary to check the status of the equipment, and then install and debug according to the steps. Pay attention to personal safety during debugging.

When installing the bending machine mold, the first thing to do is to understand the machine performance, turn on the bending machine, patiently adjust and inspect it, and see if there is any dust or iron debris that has been used before. Prevent unnecessary trouble for later use.

First, check if the thickness of the bending machine mold and the ratio of the upper and lower modules are normal. Generally, the slider needs to be controlled at the switch point of the travel line, which must be paid attention to, otherwise it will cause the mold to not function properly. However, some people still make this mistake frequently.

After adjusting the slider stroke standard, the next step is to adjust the upper limit point of the module. Generally speaking, when the module reaches its highest point, the sum switch of the module needs to be set properly. By doing so, the position where the module stays can be identified, and through the above operations, production efficiency can be greatly increased. During this process, it is also necessary to slow down the module. Because when the module reaches the bottom dead center, it is necessary to slow down the module, which protects the machine and mold.

Finally, it is about adjusting the gap between the bending machine molds. First, measure the gap between the upper and lower modules. The reasonable gap needs to be determined based on the folded sheet metal.

Adjusting the bending angle is also the most important step, and the angle selection is definitely related to the product requirements. Generally speaking, when bending a 90 ° mold, the angle must be set to the middle angle, which must be greater than the angles on both sides. Sometimes it may be too tight, which can be handled by adjusting the screws on the machine. After adjustment, do not make any further modifications to the product without changing its requirements. Then, during bending, use a pressure gauge to calculate the accurate pressure number and adjust the pressure accordingly. To avoid causing the mold to break.

In recent years, the mold industry has developed rapidly, and its regional distribution characteristics have gradually taken shape. From the perspective of regional distribution, the Pearl River Delta, Yangtze River Delta, and Anhui have developed rapidly.

Guangdong is currently the most important mold market in China, and it is also the largest province for mold exports and imports in China. More than 40% of the national mold output value comes from Guangdong, and the CNC rate and performance of mold processing equipment, mold processing technology, production specialization level, and standard level are leading in other provinces and cities in China.

Currently, Guangdong has 5 out of the top 10 enterprises ranked nationwide, with the world's largest mold supplier and Asia's largest mold manufacturing plant located in Guangdong.

With the further optimization of Guangdong's industrial structure, the development of multiple industries such as petrochemicals, automobiles, and high-tech has put forward higher requirements for Guangdong's mold manufacturing. In the coming years, mold manufacturing in Guangdong will become increasingly precise and complex.

There are currently more than 1500 mold enterprises in Shanghai, with over 70000 employees and an annual output value of nearly 10 billion yuan, with an average annual growth rate of over 20%. By 2010, the total output value will reach around 20 billion yuan; The import volume will be reduced by 30% from the current 290 million yuan, which will increase the industry's output value by about 700 million yuan, and the export volume will reach 130 million US dollars, adding another 600 million yuan to the industry's output value.

The Shanghai mold industry will focus on six major and key industries, especially the information technology (IT) and automotive industries, and vigorously develop precision magnesium alloy die-casting molds and precision injection molds in the IT industry; Multi task progressive molds for automotive covering parts, large component die-casting molds, and precision stamping parts. In 2010, the IT industry achieved 85% localization of molds and 90% localization of automotive molds.

According to preliminary statistics, there are nearly 70 stamping, plastic, die-casting and other mold enterprises producing automobiles in Shanghai, with an annual output value of about 2 billion yuan. Private enterprises such as Huazhuang, Qianyuan, Yifeng, and Huangyan, joint ventures such as Diyuan, Weishitong, and Xiaohong, and Taiwanese enterprises such as Lianheng, Hongxu, and Tailitong mostly have an annual output value of over 50 million yuan. Among them, nearly 7 enterprises have an annual output value of over 100 million yuan, and a few enterprises have an annual growth rate of 100%, becoming the main force in Shanghai's automotive mold industry.

The mold industry in Zhejiang Province is mainly concentrated in Ningbo and Taizhou cities. Ninghai, Yuyao, Cixi, and Yinzhou in Ningbo mainly produce plastic molds, Beilun mainly uses die-casting molds, and Xiangshan and Zhoushan mainly use casting and stamping molds. The main mold production enterprises in Taizhou are concentrated in Huangyan and Luqiao, with plastic molds accounting for the majority.

The mold industry in Zhejiang has some obvious characteristics. Firstly, almost all mold production enterprises are private enterprises; Secondly, mold enterprises are relatively concentrated and have formed a mold market; Thirdly, while molds can meet the needs of users at different levels, high-level molds have rapidly developed and already occupy a large proportion; Fourthly, through multiple entrepreneurial ventures, a group of high-quality backbone key enterprises have emerged; Fifth, specialized division of labor has naturally formed, and the main characteristics of enterprises are obvious; The development of the mold industry has a significant driving effect on the industrial development of the local and surrounding areas.

There are currently over 1000 various mold factories and processing points in Suzhou, Jiangsu. The annual sales of molds are about 5 billion to 6 billion yuan, making the mold industry one of the emerging industries in the city.

There are many wholly-owned and joint ventures in Japan, South Korea, Singapore, Germany, the Netherlands, the United States, Taiwan, and Hong Kong, as well as many private mold companies; Suzhou Lanpei Casting, Yuanqing Mold and other enterprises mainly produce die-casting molds and molds for automotive engines and wheel hubs. Kunshan Zhongda Mold Frame, Kunshan Precision Mold Standard Parts, Kunshan Huaxing Mold Guide Parts and other enterprises specialize in producing various large-scale mold frames, mold guide parts, mold springs and other standard parts.

At present, Anhui Province has a group of well-known domestic mold products, such as large cavity injection molds for washing machines and air conditioners, vacuum forming and foaming molds for refrigerators, high-speed progressive punching molds for motor stator and rotor laminations, etc. Some have a market share of over 30%; The molds for automotive structural components and interior parts have been stably used for the development of new models by Shanghai Volkswagen; Rubber tire molds have been recognized by major domestic tire companies; The mold standard parts and mold material base have also been formed.

A group of dynamic private mold enterprises are rising, and a gathering area for mold manufacturing is forming. Chuzhou City has become an important manufacturing base for refrigerator vacuum forming and foaming molds; Ningguo City is a gathering area for rubber molds; Xuanzhou City and Wuhu City are important manufacturing and supply bases for automotive parts, mainly focusing on thin plate stamping molds; The thick plate stamping progressive die in Bengbu City has unique characteristics; Hefei has certain advantages in injection molds, automotive molds, and rapid prototyping.

Observing the development of China's manufacturing industry from a global perspective, it can be seen that China's manufacturing industry has developed rapidly in recent years. For the CNC bending machine mold industry, this means a huge market. In this context, it is a recognized fact that China has low manufacturing costs. From the perspective of labor productivity, statistical data shows that China has a gap of about 3-5 times compared to developed countries such as Germany, the United States, and Japan. Such a large market, low labor productivity, and continuous progress and development of manufacturing technology are both opportunities and challenges for the CNC bending machine mold industry. The demand for CNC bending machine molds in the market is not only about increasing quantity, but more importantly, about improving quality. From the perspective of user industries, there are seven major industries with the most significant demand for CNC bending machine molds.

Against the backdrop of increasingly tight global energy supply and rising oil prices, the demand for power generation equipment has become increasingly evident. In the manufacturing process of power generation equipment, the cost spent only on the CNC bending machine mold part is very considerable.

In the process of mold manufacturing, CNC bending machine molds are required in almost all stages such as forming molds, hot molds, cold molds, and plastic molds. In addition, automobiles, high-speed trains, general machinery manufacturing, and the wood processing industry, which has gradually expanded its usage in recent years, have become the main users of the CNC bending machine mold industry.

In this industry, CNC bending machine molds are generally used to cut aircraft structural components. These structural components are generally large in volume and have been extensively made of aluminum alloy in the past. With the expansion of the application fields of titanium alloys and composite materials, the requirements for CNC bending machine mold processing are also increasing.

As one of the key industries supported by the state, in recent years, the government has invested a large amount of funds in the research and development of large aircraft in the aerospace industry. These developments are multifaceted, and we will analyze the aspects related to CNC bending machine molds, focusing on the use of structural component materials.

From the latest Boeing 787 fuselage, it can be seen that the previous method of directly covering with aluminum alloy has gradually been abandoned and replaced by direct laying and wrapping of composite materials. In addition, the amount of titanium alloy is also increasing. Compared to the past, the new method can greatly reduce aircraft weight, save fuel and energy consumption, which is particularly important for large passenger aircraft.

Titanium alloy is widely recognized as a difficult to machine material. Composite materials that only require laying and winding may not seem to require a large amount of processing, but the requirements for processing quality are becoming increasingly high. For the CNC bending machine mold industry, these are all significant challenges. In addition to the structural components of the aircraft body, machining the aircraft engine is also a challenge. Engines are generally made of difficult to machine materials, with complex shapes that require processes such as slotting, drilling, and blade processing. The actual cutting effect requirements for CNC bending machine molds are very high. In addition, to meet the high-quality requirements of aircraft structural components, overall blanks are generally used for processing, and more than 90% of the material will be cut off. Due to the large processing volume, high processing efficiency is required.

From the development history of CNC bending machine molds, from the late 19th century to the mid-20th century, high-speed steel was the main representative material for CNC bending machine molds; In 1927, Germany first developed hard alloy CNC bending machine mold materials and widely applied them; In the 1950s, Sweden and the United States respectively synthesized synthetic diamonds, and the cutting of CNC bending machine molds entered a period represented by superhard materials. In the 1970s, people used high-pressure synthesis technology to synthesize polycrystalline diamond (PCD), solving the problem of scarce and expensive natural diamonds, and expanding the application scope of diamond CNC bending machine molds to multiple fields such as aviation, aerospace, automotive, electronics, and stone.

The selection of mold materials for CNC bending machines is the foundation for successful cutting processing. Compared with cemented carbide, the speed of PCD CNC bending machine molds can reach 4000m/min, while cemented carbide only has 1/4 of it. In terms of lifespan, PCD CNC bending machine molds can generally increase by 20 times. From the surface quality of the processed material, the effect of PCD is 30% to 40% better than that of hard alloy. In addition, the development of CBN (cubic boron nitride) superhard material CNC bending machine molds and surface coating CNC bending machine molds has also contributed to the advancement of cutting technology.

The conventional specifications of the bending machine mold are as follows: