Considerations For Frame Type Stamping Mold Design

From the current point of view, most stamping manufacturers in China do not have more advanced manufacturing equipment, resulting in lower production efficiency. To improve production efficiency, this paper first analyzes the manufacturing process of frame stamping parts and then conducts detailed research and drawing analysis on the manufacture of crossbeam stamping dies, part of the stamping die design, etc., hoping that this will lead to a deeper understanding of the design principle and unique design process of frame longitudinal beam pressing dies, and thus resolve the contradiction between advanced productivity and backward production equipment.

Frame longitudinal beam press mold

The frame longitudinal beam is an important part of the frame components, and its design quality directly affects the overall quality of the frame products. In addition, the longitudinal beam is one of the longest working parts in frame components, and its stamping is difficult, which increases the workload accordingly. Therefore, the stamping requirements for the longitudinal beam of the frame are particularly strict. Through production practice, it is proved that a drilling template can be used to ensure the accuracy of the hole position. On the other hand, since the cross-sectional shape of the longitudinal beam belongs to slotted double right angle bending forming, free bending forming and double right angle contact bending forming can be used.

Analysis of the manufacturing process

The design of the longitudinal beam of the frame is divided into left and right. The longitudinal beam without a variable section can be directly pressed and formed by a set of dies. Still, a more systematic press arrangement is needed if the longitudinal beam member has a variable section. First of all, the following picture shows the longitudinal beam with a variable section.

Then we divide the die into three sections: front, middle, and rear, where the front and middle sections stamp the right side of the longitudinal beam, and the rear and middle sections stamp the left side. This way of working is chosen because it can save the cost of die manufacturing loss and improve stamping efficiency. After this design, we have the following picture of the stamping effect, where A+B is the right side of the stamping beam and B+C is the left side.

Suppose the work is affected by the area of the stamping equipment. In that case, different panels can be added to the left variable section and the right variable section, respectively, to ensure the effect of stamping and form on the left and the right.

Analysis of some stamping parts

Manufacture of crossbeam stamping dies

The following two graphics can be referred to in the design of the crossbeam stamping die. In general, the frame of agricultural transport has 6 crossbeams, and each crossbeam width is the same for the entire frame without a variable section. Therefore, one set of dies can be used in the stamping design. However, for the frame with a variable cross-section of longitudinal beam, the width of each beam will be more different, and the versatility of using the die will be more limited since the entire stamping process can be completed with different two-team paneling. Its frame then requires the middle section of the cross beam as a variable cross-section.

For this reason, the design of the die can be divided into three major parts: the front, middle and rear sections. The middle section can be made according to the different cross-sections. Still, the front and rear sections are designed to ensure their stability and eventually better adapt to each type of crossbeam’s bending and forming requirements.

The rest of the stamping die design

The following figure is a workpiece of U-shaped double right angle bending and forming, which is formed by stamping a Q235 steel plate, using stamping equipment of 30t~100t, and the die is formed by welding a 30mm thick Q235 steel plate.

Transmission hanger Simple bending forming mold

  After the steel plate is cut, the workpiece is not processed with high precision but made by grinding and welding with a hand-held grinder. There is no special unloading device in the simple mold, which is very difficult for the actual work. But afterward, through the actual production experience and the need to prove it, we analyze two unloading methods. The first is to observe that when the workpiece is set in the concave die, we choose the scraper unloading method. The second is the pulling method when the workpiece is set in the convex die.

  The so-called scraper unloading method is to reinforce a scraper in the die holder position, which cannot move up and down but can move from side to side. When the scraper is pulled, the press is formed, and the scraper is pushed to the upper line of the die in time to scrape down the entire workpiece.

After the stamping work is formed, the pulling wire B, which is fixed to the upper line of the convex die, is set on the bottom plate of the concave die, and then the convex die is moved upward, and the bottom plate is pulled upward to pull out the workpiece stuck in the concave die.

Summary

Through the analysis of the above material, we have roughly understood the design principle and unique design process of the frame longitudinal beam press die and solved the professional problems, such as the stamping equipment utilized to manufacture the frame longitudinal beam press die. The article also roughly introduced the knowledge of manufacturing the crossbeam press die at the end. Throughout the article, it is actually about the problem of backward manufacturing equipment, solving and analyzing the contradiction between advanced productivity and backward production equipment.