CN-121972556-A - Stretching device

Abstract

The invention discloses a stretching device, which relates to the technical field of material forming processes, and comprises a feeding mechanism, a material preparation mechanism and a stretching mechanism, wherein a material belt is provided with a feeding area matched with the feeding mechanism and a processing area connected with the feeding area, the material preparation mechanism comprises a material preparation base plate and a material preparation part, a material preparation station is arranged on the material preparation base plate and corresponds to the processing area, the material preparation part is used for carrying out material preparation processing on the processing area so as to process the processing area into a forming area for stretching and a buffer area for connecting the forming area and the feeding area, the stretching mechanism comprises an upper die assembly and a lower die assembly, the upper die assembly and the lower die assembly are matched to stretch the forming area, and the buffer area is used for reducing stretching force transmitted to the feeding area. The technical scheme provided by the invention improves the processing efficiency.

Inventors

• Fan jufeng
• WANG LILING

Assignees

• 歌尔股份有限公司

Dates

Publication Date

20260505

Application Date

20260330

Claims (10)

1. 1. The stretching device is used for processing a material belt and is characterized by comprising a feeding mechanism, a material preparation mechanism and a stretching mechanism, wherein the material preparation mechanism and the stretching mechanism are sequentially arranged in the feeding direction of the feeding mechanism, and the material belt is provided with a feeding area matched with the feeding mechanism and a processing area connected with the feeding area; The material preparation mechanism comprises a material preparation bottom plate and a material preparation part, wherein a material preparation station is arranged on the material preparation bottom plate and corresponds to the processing area, and the material preparation part is used for carrying out material preparation processing on the processing area so as to process the processing area into a forming area for stretching and a buffer area for connecting the forming area with the feeding area; The stretching mechanism comprises an upper die assembly and a lower die assembly, a stretching station is formed between the upper die assembly and the lower die assembly, the feeding mechanism acts on the feeding area to move the forming area formed by machining and the buffer area from the material preparation station to the stretching station, the upper die assembly and the lower die assembly are matched to stretch the forming area, and the buffer area is used for reducing the stretching force transmitted to the feeding area.
2. 2. The stretching device as recited in claim 1, wherein said stock piece includes a stock punch, and a stock knife edge corresponding to said stock punch is provided on said stock base.
3. 3. The stretching apparatus as recited in claim 2, wherein said stock punch has a cross-section that is at least partially continuously bent such that a connecting portion of said buffer zone for connecting said forming zone and said feeding zone is continuously bent.
4. 4. The stretching device of claim 1, wherein the stock station comprises a first stock level and a second stock level, the stock pieces comprising a first stock piece positioned at the first stock level and a second stock piece positioned at the second stock level, the first stock piece and the second stock piece being configured to stock different locations of the web.
5. 5. The stretching apparatus as recited in claim 1, wherein said stock member is provided in plurality and a plurality of said stock members are disposed at intervals along an edge of said stock station such that a plurality of said connecting portions of said buffer zone for connecting said forming zone and said feeding zone are provided and a plurality of said connecting portions are disposed at intervals along an edge of said forming zone.
6. 6. The stretching device of claim 1, further comprising a shaping mechanism movably mounted above the upper die assembly; After the upper die assembly and the lower die assembly stretch the forming area, the shaping mechanism moves downwards relative to the upper die assembly so as to punch the buffer area deformed in the stretching process.
7. 7. The stretching apparatus of claim 6, wherein the shaping mechanism comprises a shaping fixing plate and a shaping punch fixed on the shaping fixing plate, the shaping fixing plate is slidably connected with the upper die assembly, and the upper die assembly is provided with a through hole at a position corresponding to the shaping punch.
8. 8. The stretching apparatus as set forth in claim 7, wherein said shaping mechanism has an operative condition in which said shaping fixture is moved downward relative to said upper die assembly, and an inoperative condition in which said shaping fixture is spaced from said upper die assembly, at least a portion of said relief opening being empty in said inoperative condition to provide a deformation space for said buffer.
9. 9. The stretching apparatus of claim 1, wherein a flow blocking rib is disposed on a side of the upper die assembly facing the lower die assembly, and the flow blocking rib is configured to be pressed on a side of the buffer zone adjacent to the feeding zone during stretching.
10. 10. The stretching apparatus of claim 9, wherein the flow-blocking rib has a trapezoidal cross section and a short bottom side of the flow-blocking rib is disposed toward the lower die assembly.

Description

Stretching device Technical Field The invention relates to the technical field of material forming processes, in particular to a stretching device. Background In the manufacture of electronic products, precision hardware stamping parts are key structural parts for forming various devices and modules. Currently, for hardware with a tensile structure, the mainstream production process is generally continuously completed on a high-speed stamping production line by using progressive dies. In this process, the material tape is used as a carrier of the material, and the material tape is sequentially subjected to a plurality of processes such as punching, stretching, shaping, cutting and the like. Wherein, the stretching process is a key step for forming the three-dimensional structure of the part. Conventional stretching processes, especially for complex stretching with "neck-in" features, have a significant technical disadvantage. In particular, in order to achieve flow and plastic deformation of the material, the design of the stretching die generally allows or necessarily causes lateral shrinkage of the material in the deformation zone. Such "shrink-in" deformations occur not only in the individual workpiece contours, but also the deformation forces thereof are transmitted to both sides and back and forth via the not yet completely separated material web, which leads to irregular twisting, warping or wide fluctuations of the material web carrier part carrying the workpiece. However, the deformed material belt has reduced flatness and uneven rigidity distribution, and is extremely easy to interfere with a die correcting mechanism in a high-speed and continuous feeding process, thereby generating faults such as clamping stagnation, not-in-place feeding, mis-flushing and the like. This forces the production line to have to slow down the feed rate, thereby affecting the processing efficiency. Disclosure of Invention The embodiment of the invention mainly aims to provide a stretching device which aims to improve processing efficiency. In order to achieve the above object, the stretching device provided by the embodiment of the invention is used for processing a material belt, and comprises a feeding mechanism, a material preparation mechanism and a stretching mechanism, wherein the material preparation mechanism and the stretching mechanism are sequentially arranged in the feeding direction of the feeding mechanism, and the material belt is provided with a feeding area matched with the feeding mechanism and a processing area connected with the feeding area; The material preparation mechanism comprises a material preparation bottom plate and a material preparation part, wherein a material preparation station is arranged on the material preparation bottom plate and corresponds to the processing area, and the material preparation part is used for carrying out material preparation processing on the processing area so as to process the processing area into a forming area for stretching and a buffer area for connecting the forming area with the feeding area; the stretching mechanism comprises an upper die assembly and a lower die assembly, a stretching station is formed between the upper die assembly and the lower die assembly, the feeding mechanism acts on the feeding area to move the forming area formed by processing and forming and the buffer area from the material preparation station to the stretching station, the upper die assembly and the lower die assembly are matched to stretch the forming area, and the buffer area is used for reducing the stretching force transmitted to the feeding area. In an embodiment, the material preparation part comprises a material preparation punch, and a material preparation knife edge corresponding to the material preparation punch is arranged on the material preparation bottom plate. In one embodiment, the cross section of the stock punch is at least partially continuously bent, so that the connecting part of the buffer area for connecting the forming area and the feeding area is continuously bent. In an embodiment, the material preparation station comprises a first material preparation position and a second material preparation position, the material preparation parts comprise a first material preparation part arranged at the first material preparation position and a second material preparation part arranged at the second material preparation position, and the first material preparation part and the second material preparation part are used for carrying out material preparation processing on different positions of the material belt. In an embodiment, the material preparation part is provided with a plurality of material preparation parts, and a plurality of material preparation parts are arranged at intervals along the edge of the material preparation station, so that a plurality of connecting parts of the buffer area for connecting the forming area and the feeding area are arranged