CN102489600B - Process for stamping integrated floor board of heavy truck - Google Patents

Abstract

The invention discloses a process for stamping an integrated floor board of a heavy truck. The technical scheme is that: the process for stamping the integrated floor board of the heavy truck comprises the following steps of: blanking, drawing, drawing for second time, trimming, punching, flanging, shaping, performing side trimming, and punching a side hole. The process has the advantages of low die cost, high product quality, low production cost and high efficiency.

Description

Stamping Technology of Integral Floor of Heavy Truck

technical field

The invention relates to a stamping process for an integral floor of a heavy truck, and belongs to the technical field of stamping of auto parts. the

Background technique

The floor and floor stringers of heavy trucks are generally designed to be split and then welded. There is a kind of integral floor (left and right symmetry) used on heavy trucks. The floor and floor stringers are designed as a whole without welding, and the whole is stamped and formed to ensure the assembly accuracy of floor products. The structure of the floor is shown in Figure 1. The floor is made of galvanized steel plate with a thickness of 1.5-2mm. Its shape is relatively complex and has a specific product shape. Due to the large thickness of the steel plate material and complicated molding, there is no efficient and stable quality process for the monolithic floor in the prior art, which cannot meet the technical and quality requirements of its products.

Contents of the invention

The invention aims at the shortcomings of the present heavy truck integral floor stamping process, and provides a heavy truck integral floor stamping process with low mold cost, high product quality, low production cost and high efficiency.

The present invention is achieved through the following technical measures: a stamping process for an integral floor of a heavy-duty truck, which includes the following steps:

OP10: blanking;

OP20: Draw the floor part, draw with adjacent edge positioning, when drawing, the left and right floors are molded together;

OP30: drawing floor stringer part, left and right floor moulding, completed on the same pair of moulds, positioned with internal shape;

OP40: trimming, plane punching, left and right floor mold clamping, completed on the same pair of molds; positioning with internal shape, trimming around the formed parts, and punching out some holes;

OP50: Flanging, shaping, left and right floor moulding, completed on the same pair of moulds; positioning with internal shape, flanging the trimmed parts, reshaping parts of the parts, and trimming the parts The rebound part is shaped;

OP60: Side trimming, side punching, left and right floor moulding, completed on the same pair of moulds; positioning by internal shape.

In the step OP20 and step OP30, the molds for drawing the left and right floor parts and the left and right floor longitudinal beam parts adopt an inverted structure, and the punch and die are respectively installed on the corresponding lower template and upper template The upper and lower templates are installed on the working table of the press, and the upper template is installed on the slider of the press.

When carrying out said step OP30, firstly, after pressing the left and right floor parts with the upper binder plate of the mould, and then drawing the left and right floor longitudinal beam parts, the press used in this step has a locking function, and the air cushion of the press Push the ejector rod to compress the parts around. When the drawing reaches the bottom dead center and the press slider rises, the air cushion is required to have a certain time delay. rise.

Two groups of nitrogen cylinders are also fixedly installed on the above-mentioned upper template, and the piston rods of the two groups of nitrogen cylinders are respectively fixedly connected with two clamping plates, and the two clamping plates can compress the workpiece.

In said step OP60, a wedge mechanism is used for side trimming and side punching, and the punch for punching side holes is fixed on the wedge mechanism. The wedge mechanism can convert the vertical movement of the mold into the horizontal movement of the punch. The side holes can be punched out at the same time.

In the step OP20, process supplements are added, including supplements of workpiece materials and process steps.

The beneficial effects of the present invention are: during drawing, the left and right floors are clamped, and the advantages are: 1. Improve production efficiency, equipment utilization, production efficiency and product quality; 2. Solve the problem of eccentric load in drawing : Due to the large forming depth of the floor stringer and the severe partial load during forming, if the mold is not closed, the partial load will affect the precision and life of the press; 3. Using a composite mold, multiple processing contents are completed in one process , reducing the number of mold sets, reducing mold cost, and shortening the mold debugging cycle. Since the left and right parts are processed at the same time, it is easy to find the difference between the left and right parts, which is very beneficial to ensure the assembly accuracy.

Description of drawings

Fig. 1 is each process schematic diagram among the present invention.

Fig. 2 is a partial schematic view of the secondary drawing die of the present invention.

Fig. 3 is a schematic diagram of the mold structure of the mold clamping of the present invention.

FIG. 4 is a top view of FIG. 3 .

Among them: 1. Worktable, 2. Lower template, 3. Die, 4. Binder, 5. Punch; 6. Nitrogen cylinder, 7. Upper template, 8. Nitrogen cylinder, 9. Binder, 10 , Parts, 11, unloading plate, 12, ejector pin. the

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner.

As shown in the accompanying drawing, a stamping process for the integral floor of a heavy truck includes the following steps:

OP10: blanking;

OP20: Draw the floor part, draw with the positioning of the adjacent side. When drawing, the left and right floors are molded together. At the same time, process supplements can be added, including the supplement of workpiece materials and process steps. Analysis software can also be used to analyze Carry out simulation analysis on the forming process of the part, find out the parts that are easy to break, and take necessary technological measures, such as: first enlarge the local small fillet, and then carry out local shaping in the subsequent shaping process to achieve the product drawing requirements;

OP30: drawing floor stringer part, left and right floor moulding, completed on the same pair of moulds, positioned with internal shape;

OP40: trimming, plane punching, left and right floor mold clamping, completed on the same pair of molds; positioning with internal shape, trimming around the formed parts, and punching out some holes;

OP50: Flanging, shaping, left and right floor moulding, completed on the same pair of moulds; positioning with internal shape, flanging the trimmed parts, reshaping parts of the parts, and trimming the parts The rebound part is shaped to achieve the shape required by the product;

OP60: Side trimming, side punching, left and right floor mold clamping, completed on the same pair of molds; positioning with internal shape, side trimming and side punching adopts a wedge mechanism, and the punch for punching side holes is fixed on the inclined On the wedge mechanism, the wedge mechanism can convert the vertical movement of the mold into the horizontal movement of the punch, and can punch out the side hole at the same time.

Wherein, in the step OP20 and step OP30, the molds for drawing the left and right floor parts and the left and right floor longitudinal beam parts adopt an inverted structure, and the punch 5 and the die 3 are respectively installed on the corresponding lower The upper template 2 and the upper template 7, the lower template 2 are installed on the workbench 1 of the press, the upper template 7 is installed on the slider of the press, and two sets of nitrogen cylinders are fixedly installed on the upper template 7, each group At least one, specifically adopting several needs to be calculated and obtained according to the required pressure and the power of the nitrogen cylinder, the piston rods of the nitrogen cylinders 6, 8 are fixedly connected with the two pressure plates 4, 9 respectively, and the two pressure plates 4, 9 can Compress the parts.

When carrying out the step OP30, firstly, after the left and right floor parts are pressed by the binder plates 4 and 9, then the left and right floor longitudinal beam parts are drawn. The press used in this step has a locking function, and the press machine The air cushion pushes the ejector pin 12 to compress the surroundings of the workpiece 10. When the drawing reaches the bottom dead center and the slider of the press rises, the air cushion is required to have a certain time delay. When the pressing plate 9 is out of contact with the workpiece, at this time The air cushion is only lifted up, so as to ensure that the formed shape will not be damaged.

The processing contents such as adjacent edge positioning, internal shape positioning, mold, drawing and so on described in the present invention are basic terms in the stamping field and belong to common knowledge.

The undescribed technical features of the present invention can be realized by or using the prior art, and will not be repeated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Those of ordinary skill in the art Changes, modifications, additions or substitutions made within the essential scope of the present invention shall also belong to the protection scope of the present invention.

Claims (4)

1. A stamping process for an integral floor of a heavy-duty truck is characterized in that the integral floor refers to the integral system of the floor and the floor stringer, and it comprises the following steps: OP10: blanking; OP20: Draw the floor part, draw with adjacent edge positioning, when drawing, the left and right floors are molded together; OP30: drawing floor stringer part, left and right floor moulding, completed on the same pair of moulds, positioned with internal shape; OP40: trimming, plane punching, left and right floor mold clamping, completed on the same pair of molds; positioning with internal shape, trimming around the formed parts, and punching out some holes; OP50: Flanging, shaping, left and right floor moulding, completed on the same pair of moulds; positioning with internal shape, flanging the trimmed parts, reshaping parts of the parts, and trimming the parts The rebound part is shaped; OP60: Side trimming, side punching, left and right floor moulding, completed on the same pair of moulds; positioning by internal shape; In the step OP20 and step OP30, the molds for drawing the left and right floor parts and the left and right floor longitudinal beam parts adopt an inverted structure, and the punch and die are respectively installed on the corresponding lower template and upper template The upper and lower templates are installed on the working table of the press, and the upper template is installed on the slider of the press; When carrying out said step OP30, firstly, after pressing the left and right floor parts with the upper binder plate of the mould, and then drawing the left and right floor longitudinal beam parts, the press used in this step has a locking function, and the air cushion of the press Push the ejector rod to compress the parts around. When the drawing reaches the bottom dead center and the press slider rises, the air cushion is required to have a certain time delay. rise. 2. The stamping process of the integral floor of heavy-duty trucks according to claim 1, characterized in that two sets of nitrogen cylinder blocks are fixedly installed on the upper template, and the piston rods of the two sets of nitrogen cylinders are connected with the two pressure cylinders respectively. The material plates are fixedly connected, and the two pressure plates can compress the workpiece. 3. The stamping process of the integral floor of heavy trucks according to claim 1 or 2, characterized in that, in the step OP60, the side trimming and side punching adopt a wedge mechanism, and the punch for punching the side hole Fixed on the wedge mechanism, the wedge mechanism can convert the vertical movement of the mold into the horizontal movement of the punch, and can punch out the side hole at the same time. 4. The stamping process of the integral floor of heavy trucks according to claim 1 or 2, characterized in that, in the step OP20, process supplements are added, including the supplement of workpiece materials and the addition of process steps.

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