CN215845234U

CN215845234U - Process supplement structure for solving problem of size rebound of stamping part

Info

Publication number: CN215845234U
Application number: CN202121949264.3U
Authority: CN
Inventors: 刘健; 贾晓峰; 董家玲; 董向坤; 闫彦; 杨庆波; 马望; 金锋
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-18
Anticipated expiration: 2031-08-19

Abstract

The utility model provides a process supplement structure for solving the problem of size rebound of a stamped part, wherein at least one process supplement structure is arranged in a drawn or primary formed working procedure part; the process supplement structure is used for being flattened in the forming process of the subsequent procedure, so that the length of the line of the drawn or formed first procedure part is basically consistent with the length of the line of the subsequent forming of the product. Compared with the prior art, the process supplement structure for solving the problem of size rebound of the stamped part provided by the embodiment of the utility model has the following advantages: the process supplement structure can effectively eliminate the size rebound of parts with arc-shaped characteristics, improve the size precision of the parts, and save the time and cost for processing and researching the die caused by the size modification of the parts.

Description

Process supplement structure for solving problem of size rebound of stamping part

Technical Field

The utility model relates to the technical field of cold stamping, in particular to a process supplement structure for solving the problem of size rebound of a stamped part.

Background

In the field of automobile manufacturing, in order to achieve the standard target of high quality of the whole automobile, the requirement on the dimensional precision of automobile body stamping parts is very high. In the stamping field, a stamping part with arc-shaped characteristics exists, and in the process of stamping and forming the arc-shaped characteristics, the length of a stamping forming line is changed due to the change of the shape of a product, so that the stress borne by the part is changed. After the forming is finished, the residual stress in the part causes the rebound phenomenon in the area, and the dimensional precision is seriously influenced. In order to solve the above problems, the conventional solution is to make a dimension correction amount and re-machine the mold surface according to the dimension tolerance of the part. The method has poor one-time correction effectiveness, needs multiple rounds of rectification to achieve the effect, has long mold processing and matching period and high cost, and is not beneficial to meeting the development requirements of high quality and short cycle of the current vehicle type project.

Disclosure of Invention

To address the above problems, embodiments of the present invention provide a process complement to address dimensional springback of stamped parts that overcomes, or at least partially addresses, the above problems.

The embodiment of the utility model provides a process supplement structure for solving the problem of size rebound of a stamped part, wherein at least one process supplement structure is arranged in a drawn or primary formed working procedure part; the process supplement structure is used for being flattened in the forming process of the subsequent procedure, so that the length of the line of the drawn or formed first procedure part is basically consistent with the length of the line of the subsequent forming of the product.

And the process supplementing structure and the bottom surface of the working procedure piece are rounded.

Wherein, the radius of the fillet is 5-15 mm.

The method is applied to parts with arc-shaped features.

Wherein, the distance between the top end of the process supplement structure and the concave fillet of the part is 5-20 mm.

Wherein the length of the process supplement structure is 10-30 mm.

Wherein the width of the process supplement structure is 5-15 mm.

Wherein the height of the process supplement structure is 3-10 mm.

Compared with the prior art, the process supplement structure for solving the problem of size rebound of the stamped part provided by the embodiment of the utility model has the following advantages: the process supplement structure can effectively eliminate the size rebound of parts with arc-shaped characteristics, improve the size precision of the parts, and save the time and cost for processing and researching the die caused by the size modification of the parts.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from these without inventive effort.

FIG. 1 is a basic shape of a part having a feature of a circular arc shape provided by an embodiment of the present invention;

FIG. 2 is a drawing process part shape of a conventional part with a feature of a circular arc shape according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a drawn process piece in comparison to a product provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a difference in forming line length between a conventional drawing process part and a product (post-forming) in a circular arc feature area provided by an embodiment of the present invention;

FIG. 5 is a drawing process part shape with a feature of a circular arc shape including a new process complementary structure according to an embodiment of the present invention;

fig. 6 is a length schematic of a forming line between a drawing process piece and a product (post forming) including a new process supplement structure provided by an embodiment of the present invention.

In the figure, 1. process supplement structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

In order to solve the above problems in the prior art, an embodiment of the present invention provides a new complementary structure for solving the problem of dimensional springback of a stamped part, which is mainly applied to a part having a feature of a circular arc shape. The process supplement structure can ensure that the length of a line of a drawn or first-time forming process part is basically consistent with the length of a product (subsequent forming) line in the stamping forming process of the part, thereby reducing the internal residual stress of the part after forming, reducing the size rebound, ensuring the size precision and further reducing the die reforming cycle and the cost.

Firstly, the embodiment of the utility model is realized by adopting the following technical scheme: a new technological supplementary structure for solving the springback of a stamped part is characterized in that a plurality of technological supplementary structures are manufactured on a drawn or first-forming process part, the length of each technological supplementary structure is 10-30mm, the width of each technological supplementary structure is 5-15mm, the height of each technological supplementary structure is 3-10mm, the distance between the top end of each technological supplementary structure and a concave fillet of the part is 5-20mm, the structures and the bottom surface of the process part are rounded, and the radius of the fillet is 5-15 mm. The process supplement structure is flattened in the forming process of the subsequent procedure, and the length of the line of the drawn or formed procedure piece for the first time is basically consistent with the length of the line of the product (subsequent forming), so that the size rebound is reduced, and the size precision is ensured.

Compared with the prior art, the embodiment of the utility model has the following advantages: the process supplement structure can effectively eliminate the size rebound of parts with arc-shaped characteristics, improve the size precision of the parts, and save the time and cost for processing and researching the die caused by the size modification of the parts.

Referring to fig. 1-6, a part with a circular arc shape is generally manufactured by a drawing process and a subsequent forming process, as shown in fig. 1 and 2. To ensure the press-formability of the part, the drawing process increases the drawing angle and the fillet radius at the product elevation, and this position is formed to the product shape in the post-process, as shown in fig. 3. During the forming process of the drawing process piece in the post process, the material of the part flows, the length of a material forming line is increased from b to a in a characteristic area of the arc shape, and the material in the area is in tensile stress in the tangential direction of the arc, as shown in figure 4. After the forming is finished, the part is influenced by internal residual stress, the surface can generate rebound deformation in the normal direction, and the condition of size out-of-tolerance occurs. The process supplement structure 1 provided by the utility model is added in the arc-shaped area of the drawing process part, the length of the forming line of the drawing material can be increased from b to c and is close to a, so that the tensile stress generated in the tangential direction of the arc of the material in the subsequent forming process can be obviously reduced, the internal residual stress is correspondingly reduced, the surface rebound deformation of the part is eliminated, and the dimensional accuracy is ensured, as shown in figures 5 and 6.

Example 2

The embodiment is realized by adopting the following technical scheme: the process of the part with the arc-shaped characteristic comprises drawing and shaping procedures. 3 process supplement structures are manufactured in the drawing process, the length of the process supplement structures is 15mm, the width of the process supplement structures is 10mm, the height of the process supplement structures is 4mm, the distance between the top end of the process supplement structures and the concave fillet of the part is 5mm, the bottom surfaces of the structure and the process part are rounded, and the radius of the fillet is 8 mm. In the subsequent shaping process, the 3 process supplement structures are flattened, so that the length of the line of the drawing process part is basically consistent with the length of the product line. The process supplement structure effectively eliminates size rebound of the circular arc area of the part, thereby saving the time and cost for processing and debugging the die caused by the size adjustment and modification of the part.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a solve technology that punching press part size kick-backs and supply structure which characterized in that:

at least one process supplement structure (1) is arranged in a drawn or primary formed working piece;

the process supplement structure (1) is used for being flattened in the forming process of the subsequent procedure, so that the length of the line of the drawn or formed first procedure part is basically consistent with the length of the line of the subsequent forming of the product.

2. A process complement arrangement for resolving dimensional springback of stamped parts as claimed in claim 1, wherein said process complement arrangement (1) is radiused to said bottom surface of said work piece.

3. A process addition structure for solving the problem of dimensional springback of a stamped part as recited in claim 2, wherein said fillet radius is 5-15 mm.

4. A process complementary structure for solving the problem of dimension rebound of a stamped part as set forth in claim 1, applied to a part characterized by a circular arc shape.

5. A process complement to solve dimensional springback of stamped parts according to claim 1, characterized in that the length of the process complement (1) is 10-30 mm.

6. A process complement to solve dimensional springback of stamped parts according to claim 1, wherein said process complement (1) has a width of 5-15 mm.

7. A process complement to solve dimensional springback of stamped parts according to claim 1, wherein the height of the process complement (1) is 3-10 mm.

8. A process supplement structure for solving the problem of dimensional springback of a stamped part according to claim 1, wherein the top end of the process supplement structure (1) is 5-20mm from the concave fillet length of the part.