阅读说明：本技术 箱体弯折装置 (Box bending device ) 是由 顾燕清 于 2019-09-09 设计创作，主要内容包括：一种箱体弯折装置,包括下模组件和折弯组件,下模组件包括用于托撑箱体的工作台以及用于定位箱体的定位组件,工作台包括相平行设置的第一安装板和第二安装板,第一安装板和第二安装板下方分别设置有导轨以及用于驱动第一安装板和第二安装板沿导轨做相向运动的退模气缸,第一安装板和第二安装板上分别设置有折弯内模；折弯组件设置于下部固定座的上方,包括转轴,与转轴连接的折弯外模,与折弯外模相连接、可绕折弯外模旋转的折弯支架。本技术从折弯箱体的定位、折弯内模形状和结构及折弯过程中辅助机构三个方面进行创新设计,解决了由于不同箱体板材、尺寸、形状而造成的定位偏移的不良现象、以及折弯R角的不确定而导致折弯后箱体形状不稳定。(A box bending device comprises a lower die assembly and a bending assembly, wherein the lower die assembly comprises a workbench for supporting a box body and a positioning assembly for positioning the box body, the workbench comprises a first mounting plate and a second mounting plate which are arranged in parallel, a guide rail and a die stripping cylinder for driving the first mounting plate and the second mounting plate to move along the guide rail in opposite directions are respectively arranged below the first mounting plate and the second mounting plate, and a bending inner die is respectively arranged on the first mounting plate and the second mounting plate; the bending assembly is arranged above the lower fixing seat and comprises a rotating shaft, a bending outer mold connected with the rotating shaft and a bending support connected with the bending outer mold and capable of rotating around the bending outer mold. The technology is innovatively designed from three aspects of the positioning of the bending box body, the shape and the structure of the bending internal mold and the auxiliary mechanism in the bending process, and solves the problem that the shape of the bent box body is unstable due to the bad phenomenon of positioning deviation caused by different box body plates, sizes and shapes and the uncertainty of the bending R angle.)

1. A case bending apparatus, comprising:

the lower die assembly (1) comprises a workbench (11) for supporting a box body and a positioning assembly for positioning the box body, the workbench (11) comprises a first mounting plate (12) and a second mounting plate (13) which are arranged in parallel, a guide rail (14) and a die stripping cylinder (15) for driving the first mounting plate (12) and the second mounting plate (13) to move oppositely along the guide rail (14) are respectively arranged below the first mounting plate (12) and the second mounting plate (13), and the first mounting plate (12) and the second mounting plate (13) are respectively provided with a bending inner die (3);

the bending assembly (2) is arranged above the lower fixing seat (1) and comprises a rotating shaft (21), a bending outer die (22) connected with the rotating shaft (21), and a bending support (23) which is connected with the bending outer die (22) and can rotate around the bending outer die (22).

2. A box bending apparatus according to claim 1, wherein: the end part of the bending bracket (23) is connected with a buffer roller (24).

3. A box bending apparatus according to claim 1, wherein: the bending internal mold (3) is provided with an upward supporting surface (36) and a bending side surface (37) connected with the supporting surface (36), an internal mold chamfer is arranged between the bending side surface (37) and the supporting surface (36), and the included angle of the internal mold chamfer is smaller than 90 degrees.

4. A box bending apparatus according to claim 1, wherein: the positioning assembly is a floating positioning mechanism (16), and the floating positioning mechanism (16) comprises a positioning pin (17), a positioning cylinder (18) connected with the positioning pin (17) and a movable cylinder mounting seat used for arranging the positioning cylinder (18).

5. A box bending apparatus according to claim 1, wherein: the bending assembly (2) comprises a pressing mechanism (25), and the pressing mechanism (25) is connected with the bending outer die (22).

6. A box bending apparatus according to claim 1, wherein: the pressing mechanism (25) further comprises a pressing air cylinder (26) and a guide post (27) connected with the pressing air cylinder (26), and the guide post (27) is connected with the bending support (23).

7. A carton bending device according to claim 5, wherein: and a pressing die (28) is arranged on the bending bracket (23).

8. A box bending apparatus according to claim 1, wherein: the bending component (2) is provided with a stop block component (29), and the stop block component (29) comprises a cushion pad (30), a pressing block (31), a limiting block (32) connected with the pressing block (31) and a stop block cylinder (33) connected with the limiting block (32).

9. A box bending apparatus according to claim 1, wherein: the lower fixed seat (1) is provided with a side stop block (34).

10. A box bending apparatus according to claim 1, wherein: the rotating shaft (21) is connected with a rotating shaft adjusting pad (35) used for adjusting the installation position of the rotating shaft (21).

Technical Field

The invention relates to 90-degree bending equipment for a drum box body of a washing machine.

Background

The washing machine mainly comprises a box body, an inner barrel, a transmission and control system and the like, wherein the washing machine box body needs to be bent in the production process, however, the bending die of the washing machine box body on the existing market is adopted for bending, the bad phenomenon of positioning deviation is caused after different box body plates, sizes and shapes are bent, and the phenomenon that the shape of the bent box body is unstable due to the fact that the R angle of the bent box body is uncertain occurs.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide 90-degree bending equipment for a drum box body of a washing machine, which is simple in structure and stable in performance.

In order to achieve the purpose, the invention provides a box body bending device which comprises a lower die assembly and a bending assembly, wherein the lower die assembly comprises a workbench for supporting a box body and a positioning assembly for positioning the box body, the workbench comprises a first mounting plate and a second mounting plate which are arranged in parallel, a guide rail and a die stripping cylinder for driving the first mounting plate and the second mounting plate to move oppositely along the guide rail are respectively arranged below the first mounting plate and the second mounting plate, and a bending inner die is respectively arranged on the first mounting plate and the second mounting plate; the bending assembly is arranged above the lower fixing seat and comprises a rotating shaft, a bending outer die connected with the rotating shaft and a bending support connected with the bending outer die and capable of rotating around the bending outer die.

As a further improvement of the invention, the end part of the bending bracket is connected with a buffer roller.

As a further improvement of the invention, the bending inner die is provided with an upward supporting surface and a bending side surface connected with the supporting surface, an inner die chamfer is arranged between the bending side surface and the supporting surface, and the included angle of the inner die chamfer is smaller than 90 degrees.

As a further improvement of the present invention, the positioning assembly is a floating positioning mechanism, and the floating positioning mechanism includes a positioning pin, a positioning cylinder connected to the positioning pin, and a movable cylinder mounting seat for mounting the positioning cylinder.

As a further improvement of the invention, the bending assembly comprises a pressing mechanism, and the pressing mechanism is connected with the bending outer die.

As a further improvement of the invention, the pressing mechanism further comprises a pressing cylinder and a guide post connected with the pressing cylinder, and the guide post is connected with the bending bracket.

As a further improvement of the invention, a compaction die is arranged on the bending bracket.

As a further improvement of the invention, the bending assembly is provided with a stop block assembly, and the stop block assembly comprises a cushion pad, a pressing block, a limiting block connected with the pressing block and a stop block cylinder connected with the limiting block.

As a further improvement of the invention, the lower fixed seat is provided with a side stop block.

As a further improvement of the invention, the rotating shaft is connected with a rotating shaft adjusting pad used for adjusting the installation position of the rotating shaft.

By adopting the technical scheme, the technology is innovatively designed from three aspects of the positioning of the bending box body, the shape and the structure of the bending internal mold and the auxiliary mechanism in the bending process, solves the bad phenomenon of positioning deviation caused by different box body plates, sizes and shapes, and solves the phenomenon of unstable box body shape after bending due to uncertain bending R angle.

Drawings

FIG. 1 is a front view of the box bending apparatus of the present invention;

FIGS. 2 and 3 are floating positioning pin mechanisms of the box bending device of the present invention;

FIG. 4 is a pressing mechanism of the box bending apparatus of the present invention;

FIG. 5 is a bending assembly of the box bending apparatus of the present invention;

FIG. 6 is a bending inner mold assembly of the box bending apparatus of the present invention;

FIG. 7 is an R angle of a bending inner die of the box bending device of the present invention;

FIG. 8 is a movable inner mold mechanism of the box bending apparatus of the present invention;

FIG. 9 shows a bending assembly and a stopper assembly of the box bending apparatus according to the present invention;

FIG. 10 shows the stopper of the bending device of the present invention;

FIG. 11 shows a lower mold assembly and a side stop of the box bending apparatus according to the present invention;

FIG. 12 is a side stop of the box bending apparatus of the present invention;

FIG. 13 shows a bending assembly and an outer bending mold of the bending apparatus for a box body of the present invention;

FIG. 14 shows a bending state of the bending apparatus for a box body according to the present invention;

fig. 15 is an enlarged partial schematic view of fig. 14.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to fig. 1 to 15, the box bending apparatus in this embodiment includes a lower die assembly 1 and a bending assembly 2, the lower die assembly 1 includes a workbench 11 for supporting a box and a positioning assembly for positioning the box, the workbench 11 includes a first mounting plate 12 and a second mounting plate 13 arranged in parallel, a guide rail 14 and a die-stripping cylinder 15 for driving the first mounting plate 12 and the second mounting plate 13 to move along the guide rail 14 are respectively arranged below the first mounting plate 12 and the second mounting plate 13, and the first mounting plate 12 and the second mounting plate 13 are respectively provided with a bending inner die 3; the bending assembly 2 is arranged above the lower fixing seat 1 and comprises a rotating shaft 21, a bending outer die 22 connected with the rotating shaft 21, and a bending support 23 connected with the bending outer die 22 and capable of rotating around the bending outer die 22.

In order to solve the problem that the bending positioning holes are relatively deviated due to different warping degrees of flattening parts before bending due to different box body plates and width and depth sizes in the prior art, as shown in the attached drawings 2 and 3, in order to ensure accurate positioning, a positioning mode consistent with an upper stamping process is adopted. The floating positioning mechanism 16 is designed with an existing aperture in the tank. The floating positioning mechanism 16 comprises a positioning pin 17, a positioning cylinder 18 connected with the positioning pin 17 and a movable cylinder mounting seat used for arranging the positioning cylinder 18, and the accurate positioning of the box body plate is ensured by adjusting the position of the cylinder mounting seat of the cylinder.

Because the warping degrees of the box body flattening parts are different, in order to control the warping degree of the flattening parts and ensure accurate positioning, the pressing mechanism 25 is designed to control the warping degree of the flattening parts, and the pressing mechanism 25 is connected with the bending outer die 22. As shown in fig. 3. Two pressing cylinders 26 are used for providing power sources, the bending support 23 and the bending assembly 2 are driven to be guided through guide columns 27, a pressing die 28 is arranged on the bending support 23, and the flattening piece is pressed through the pressing die 28 on the bending assembly 2.

For the problem of determining the bending R angle of the internal mold, due to the influence of the material performance of the box flattening piece, in order to ensure that the bending angle of the box after bending is stable and the shape of the box after bending is regular, it is necessary to determine the bending R angle of the internal mold (as shown in FIG. 7). The bending inner die 3 is provided with an upward supporting surface 36 and a bending side surface 37 connected with the supporting surface 36, an inner die chamfer is arranged between the bending side surface 37 and the supporting surface 36, and the included angle of the inner die chamfer is smaller than 90 degrees. According to the technology, the inner die bending R angle is roughly selected according to the thickness, the resilience, the material characteristics and the tolerance requirement of the R angle to be formed of the box body plate, and the R angle is finally determined after sample trial bending and debugging verification.

Designing a movable internal mold mechanism: in order to offset the distortion and rebound deformation of the bent box body, the bending angle of the box body is slightly larger than 90 degrees, and the inner die can be rubbed and touched on the inner wall of the box body if the inner die directly moves downwards and exits. Therefore, the movable inner die assembly is designed, the moving direction is shown as the arrow in the following figure, the bending inner dies 3 on the two sides respectively move inwards, so that the bending inner dies 3 can be ensured to be withdrawn without obstruction, and the bending quality of the box body can be ensured. The specific structure is shown in fig. 8. The mechanism changes the distance of the bending inner die 3 at two sides by pulling the bending inner die 3, the first mounting plate 12 and the second mounting plate 13 to reciprocate on the guide rail slider mechanism through the air cylinder so as to realize the actions of die feeding, die retreating after bending and the like when the box body is bent.

Design of the bending and pressing die 28 and the pressing functional components: to ensure the bending quality of the box, the pressing mechanism 25 and the stop block assembly 29 shown in fig. 9 and 10 are designed as described above. The bending component 2 is provided with a stop block component 29, and the stop block component 29 comprises a cushion pad 30, a pressing block 31, a limiting block 32 connected with the pressing block 31 and a stop block cylinder 33 connected with the limiting block 32. The pressing block 31 plays a role in pressing the box body, is used in combination with the cushion pad 30, and is matched with the bending positioning mechanism, so that the box body is ensured to have no relative movement in the front and back bending positions. As shown in fig. 10, the bending inner die 3 assembly is attached to the limit block 32, and the limit block 32 is used as a reference, so that the bending inner die 3 assembly is prevented from moving in the direction indicated by an arrow due to the force caused by bending in the bending process, and the bending size is ensured. Meanwhile, in order to prevent the side edge from having no protrusion in the bending process, side edge stop blocks 34 (as shown in fig. 11 and 12) are arranged at four corners of the box positioning surface on the lower fixing seat 1 to ensure the bending quality of the box.

In order to ensure the bending quality, the bending external mold 22 and related components shown in fig. 13 to fig. 15 are designed as follows, the end of the bending bracket 23 is connected with a buffer roller 24, and a cylinder is used as a power source, and the rotating shaft 21 rotates to drive the bending external mold 22 and the buffer roller 24 to perform bending action. The buffer roller 24 is arranged to assist the bending outer die 22 to bend the flattening piece, the bending radius and the bending moment are increased, the bending angle quality is guaranteed, and the rotating shaft 21 is connected with a rotating shaft adjusting pad 35 used for adjusting the installation position of the rotating shaft 21. The installation position of the rotating shaft 21 is adjusted through the adjusting pad, so that the rotating center of the bending outer die 22 is consistent with the R angle center of the inner die. The gap between the bending external die 22 and the bending internal die 3 is smaller than the plate thickness by using the rotating shaft adjusting pad and the side stop adjusting pad, so that the bending quality is improved.

By adopting the technical scheme, the technology is innovatively designed from three aspects of the positioning of the bending box body, the shape and the structure of the bending internal mold and the auxiliary mechanism in the bending process, solves the bad phenomenon of positioning deviation caused by different box body plates, sizes and shapes, and solves the phenomenon of unstable box body shape after bending due to uncertain bending R angle.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.