CN114029408B - Bending wrap angle die and bending wrap angle method - Google Patents

Abstract

The invention discloses a bending wrap angle die which comprises a first die and a second die which are oppositely arranged, wherein a bending part and a fixing part are arranged on one side, facing the second die, of the first die, the fixing part is fixedly connected with the first die, and the bending part is rotatably connected with the fixing part. Through the arrangement, the bending part installed in a rotating mode on the die is used for bending the plate, so that the problems that the surface of the plate is easy to break a film and paint is dropped when the plate is bent by the traditional bending wrap angle die are solved. The invention also provides a bending and corner wrapping method of the bending and corner wrapping die, and the bending and corner wrapping process can be synchronously carried out on the clamped plate by utilizing the bending part and the fixing part in the relative movement process of the first die and the second die.

Description

Bending wrap angle die and bending wrap angle method

Technical Field

The invention relates to the technical field of dies, in particular to a bending wrap angle die and a bending wrap angle method.

Background

In the existing forming mode of the bending die, no matter whether the bending edge is uneven, the stroke of the bending edge or the cornerite edge entering the die is to be formed according to the highest edge, so that the friction force between the surface of the plate and the die is very large, and the paint surface attached to the surface of the bending edge is greatly dropped, scratched and broken.

In addition, at present, when the door shell is bent and wrapped, the end of the door shell adopts a method of bending first and then wrapping the angle, and two sets of dies are needed to finish the bending operation, so that the plate is required to be moved into the wrapped angle die to wrap the angle, time and labor are wasted, the efficiency is low, and the plate is required to be moved again, and the wrapped angle of the end of the plate is easy to generate the defects of wrinkling, paint dropping, film dropping, uneven appearance and the like, so that the appearance is seriously influenced, and meanwhile, the processing precision is not guaranteed.

The present invention has been made in view of this.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art, and provides a bending wrap angle die which is used for pre-bending a plate through rotation of a bending part so as to prevent paint from falling and film from breaking on the surface of a bending edge of the plate.

In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:

the utility model provides a wrap angle mould of bending, includes relative first mould and the second mould that sets up, and first mould installs portion of bending and fixed part towards second mould one side, but fixed part and first mould fixed connection, the portion of bending and fixed part swivelling joint.

Further, the fixed part comprises at least one fixed block, the bending part comprises at least one bending component, and two adjacent side surfaces of the fixed block are respectively and rotatably connected with the bending component.

Further, two adjacent side surfaces of the fixed block are respectively provided with a mounting groove, and the bending assembly is rotationally connected with the fixed block through the mounting grooves;

preferably, two adjacent side surfaces of the fixed block are respectively provided with square grooves recessed into the fixed block, and the two square grooves respectively form a first mounting groove and a second mounting groove;

preferably, the mounting groove is located away from the adjacent side intersection line and away from the second die.

Further, one side of the mounting groove, which is close to the intersection line of two adjacent side surfaces on which the mounting groove is arranged, is an inclined surface which is inclined from bottom to top towards the direction close to the intersection line;

preferably, a first arc groove recessed into the fixed block is formed at the intersection of the inclined surface side and the lower side of the mounting groove.

Further, a second arc groove recessed into the fixed block is formed in the intersection line of two adjacent side surfaces of the mounting groove arranged on the fixed block;

preferably, the lower end of the second circular arc groove is a horn-shaped opening which gradually increases from top to bottom.

Further, the bending assembly comprises a rotating seat, a bending cutter and a bending cutter fixing seat; the rotating seat is in a block-shaped structure; two opposite ends of the rotating seat, one end of which is matched with the mounting groove and can be rotatably connected, and the other end of which is fixedly connected with the bending knife fixing seat; the bending knife is arranged on the bending knife fixing seat.

Further, the cross section of the bending knife fixing seat is rectangular, one end part of the bending knife fixing seat, which is close to the second die, is inwards concave and is provided with an inverted L-shaped concave groove, and a bending knife is arranged in the groove.

Further, the fixed part comprises a first fixed block, a second fixed block, a third fixed block and a fourth fixed block which are positioned at four corners of the square, a bending component is respectively arranged between every two adjacent fixed blocks, and two ends of the bending component are respectively and rotatably connected with the fixed blocks at the corresponding ends.

Further, the first mould is provided with first board and the first knock pin that takes off towards second mould one side, and first board that takes off sets up in fixed part and bend downside, and first knock pin sets up in fixed part and bend portion upside.

The invention further aims to provide a bending and cornering method, wherein a bending procedure and a cornering procedure are performed simultaneously, so that the production efficiency of a product is improved.

Still another object of the present invention is to provide a method for bending and chamfering, which performs pre-bending and pre-chamfering on a board simultaneously before performing a bending and chamfering procedure on the board, so as to reduce friction between a mold and the board and improve the appearance and the aesthetic property of the product.

In order to achieve the above purpose, the invention adopts the following specific scheme:

the invention also provides a bending wrap angle method of the bending wrap angle die, wherein in the process of relatively moving the first die and the second die, the bending part and the fixing part bend the plate clamped between the first die and the second die at the same time;

further, the method specifically comprises the following steps,

1) The die starts to run, the first die and the second die are reset, and the bending part rotates under the action force of a first ejector pin on the first die;

2) The first die descends, a first stripper plate on the first die presses a plate placed on the second die, the first die continues to descend, and the plate is contacted with the fixing part and the bending part;

3) The first die continues to descend, the bending part rotates to reset under the action of the first stripper plate on the first die, and the bending part and the fixing part jointly act to perform pre-bending and pre-wrap angle on the plate simultaneously;

4) The bending part rotates to a vertical state and does not rotate any more, the die continues to move the bending part and the fixing part downwards for a certain distance along the vertical direction, and the bending wrap angle procedure is completed.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.

1. The invention provides a bending wrap angle die, which is used for bending a plate by using a bending part arranged in a rotating manner on the die, and buffering the bending acting force of the plate by using the rotating displacement of the bending part, so that the problems of easy film breaking, paint dropping and the like on the surface of the plate when the plate is bent by the traditional bending wrap angle die are solved, and the protection effect on a finished product in the bending process is remarkably improved.

2. Meanwhile, according to the bending wrap angle die provided by the invention, different numbers of fixing blocks and bending assemblies can be selected and arranged according to the bending wrap angle requirements of plate products so as to form various die structures in various forms, so that the flexibility of the die is improved.

3. According to the bending corner wrapping method provided by the invention, before the final bending corner wrapping procedure is carried out on the plate, the bending knife fixing seat and the bending knife are driven to rotate by the rotating seat to pre-bend the plate, and meanwhile, the horn-shaped opening on the fixing part is contacted with the plate to pre-wrap the plate, so that the friction force between the plate and the die is reduced, the problems of film breaking, paint dropping and the like of the appearance of the plate during the bending corner wrapping are avoided, the appearance quality of the plate is effectively improved, and the bending corner wrapping requirement of the plate with high surface requirements is met.

Meanwhile, the invention has simple structure and obvious effect, and is suitable for popularization and use.

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic plan view of a first mold and a second mold according to an embodiment of the present invention without clamping;

FIG. 2 is a schematic plan view of a first mold and a second mold according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a connection mode of a fixing portion and a bending portion in an embodiment of the present invention;

fig. 4 is a schematic structural view of a fixing portion in an embodiment of the present invention.

In the figure: 1. a fixing part; 11. a fixed block; 12. a first fixed block; 13. a second fixed block; 14. a third fixed block; 15. a fourth fixed block; 111. a mounting groove; 112. an inclined plane; 113. a first circular arc groove; 114. a second circular arc groove; 115. a horn-shaped opening; 116. a first mounting groove; 117. a second mounting groove; 2. a bending part; 21. a bending assembly; 22. a first bending component; 23. a second bending component, 24 and a third bending component; 25. a fourth bending assembly; 211. a bending knife; 212. a bending knife fixing seat; 213. a rotating seat; 3. a first mold; 31. a first stripper plate; 32. a first knock pin; 4. and a second mold.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1-4, the invention discloses a bending wrap angle die, which comprises a first die 3 and a second die 4 which are oppositely arranged, wherein a bending part 2 and a fixing part 1 are arranged on one side of the first die 3, which faces the second die 4, a forming female die is arranged on one side of the second die 4, which faces the first die 3, the fixing part 1 is fixedly connected with the first die 3, and the bending part 2 is rotatably connected with the fixing part 1, so that the board can be pre-folded before being bent, and the occurrence of film breaking and paint dropping on the surface of the board can be avoided.

In this embodiment, the portion of bending 2 is connected with first mould through fixed part 1, can be with whole portion of bending 2's dismantlement or installation through the dismouting of portion of bending 2 and fixed part 1 to the convenience is adjusted according to the production demand, has solved the problem that current wrap angle mould structure of bending is complicated, and the dismouting adjustment is difficult, makes the mould product maintenance more easily.

In this embodiment, the fixing portion 1 includes at least one fixing block 11, the bending portion 2 includes at least one bending component 21, two adjacent sides of the fixing block 11 are respectively rotatably connected with one bending component 21, specifically, two adjacent sides of the fixing block 11 are respectively provided with an installation groove 111, and the bending component 21 is rotatably connected with the fixing block 11 through the installation groove 111; by providing the mounting groove 111, the mounting of the fixing block 11 and the bending member 21 is facilitated. Two adjacent sides of the fixed block 11 are respectively provided with square grooves recessed into the fixed block 11, the two square grooves respectively form a first mounting groove 116 and a second mounting groove 117, the first mounting groove 116 and the second mounting groove 117 are respectively positioned at the end corners of the corresponding sides, the end corners of the mounting groove 111 are respectively far away from one side of the connecting line of the adjacent sides and the second mould, through the arrangement, one fixed block 11 can be connected with two bending assemblies 21, and the two bending assemblies are not interfered with each other.

In this embodiment, the side surface of the first mounting groove 116 parallel to the plane of the second mounting groove 117 is an inclined surface 112 gradually approaching the plane of the second mounting groove 117 from bottom to top, and the side surface of the second mounting groove 117 parallel to the plane of the first mounting groove 116 is an inclined surface 112 gradually approaching the plane of the first mounting groove 116 from bottom to top; after the bending module 21 is fixed to the mounting groove 111 of the fixing block 11, the bending module 21 can be rotated at a certain angle due to the inclined surface 112.

In this embodiment, the inclined surface 112 of the first mounting groove 116 is connected to the side surface of the first mounting groove 116 perpendicular to the plane of the first mounting groove 116 by a first circular arc groove 113 recessed into the fixing block 11. The bending assembly 21 rotates with the first circular arc groove 113 as a fixed point. Through setting up first circular arc recess 113 to make bending subassembly 21 just can realize with the help of less strength for fixed block 11 is rotatory, also avoid bending subassembly 21, fixed block 11 to appear wearing and tearing after long-time the use simultaneously, and then prolonged the life of mould, reduction in production cost.

In this embodiment, two adjacent sides of the fixing block 11 provided with the mounting groove 111 are connected by a second arc groove 114 which is vertical and concave into the fixing block; the second circular arc groove 114 is in contact with the plate to wrap the round corner, the horn-shaped opening 115 which is gradually widened from top to bottom is arranged at the lower end of the second circular arc groove 114, the opening end of the horn-shaped opening 115 is in the shape of an arc expanding towards the bottom surface of the fixed block 11, the horn-shaped opening 115 faces the plate needing to wrap the corner, and when the plate is wrapped, the plate is contacted with the horn-shaped opening 115 first, so that the pre-wrap is carried out on the plate, friction on the surface of the plate is reduced, the problems of film breaking, paint dropping and the like on the surface of the plate are avoided, and the quality and the appearance attractiveness of the plate are improved.

Through the setting, the subassembly 21 of bending can be connected with first mould 3 through fixed block 11, the fixed point of subassembly 21 of bending can be regarded as to the first circular arc recess 113 on the fixed block 11, make the subassembly 21 of bending rotatory around fixed block 11, simultaneously, fixed block 11 still can wrap the fillet to the panel, under the cooperation of fixed block 11 and subassembly 21 of bending in this embodiment, this wrap angle mould of bending can bend the wrap angle to the panel simultaneously, compare earlier in prior art and bend the wrap angle again, the production efficiency of wrap angle mould of bending in this embodiment is higher, and panel quality is better, simultaneously, the wrap angle mould part quantity of bending in this embodiment is few, the installation of being convenient for, degree of automation is high, can effectively reduce manufacturing cost.

In this embodiment, the bending assembly 21 includes a rotating seat 213, a bending blade 211 and a bending blade fixing seat 212; the rotary seat 213 is fixedly connected with the bending knife fixing seat 212, and the bending knife 211 is connected with the bending knife fixing seat 212, so that the bending assembly 21 is a fixed whole and is then installed with the fixed block 11, and the installation is easier.

In this embodiment, the bending knife 211 and the bending knife fixing seat 212 adopt the mosaic structure, the cross section of the bending knife fixing seat 212 is rectangular, the part of the bending knife fixing seat 212 near one end of the second die 4 is concave inwards and is a concave groove with an inverted L shape, the bending knife is installed in the groove, in four planes where the long edge of the bending knife is located, two adjacent sides are wrapped by the bending knife fixing seat, and the other two sides are communicated with the outside, preferably, the lower surface of the bending knife 211 is flush with the lower surface of the bending knife fixing seat 212, so that the bending knife fixing seat protects the bending knife in the folding manner, prolongs the service life of the bending knife, and does not influence the bending knife to bend the plate.

In this embodiment, the bending knife fixing seat 212 is made of soft material, the bending knife 211 is made of hard material, the soft material is generally low carbon steel, and the higher the carbon content is, the harder the material is; the hard die is a material needing heat treatment and is used for a template punch bending block and the like, and the general material is Cr12MoV or domestic tool steel T8T 10 or imported SLD\SKH51 and the like; the soft material generally does not need the material of heat treatment, such as material 45# or A3, and to the sword of bending, hardness is too low can influence blanking quality, so the sword of bending adopts hard material to make in this implementation to do not influence the work effect of sword of bending, improve the appearance quality of panel, the sword fixing base of bending adopts soft material to make, can effectively reduce the manufacturing cost of mould.

In this embodiment, the rotating seat 213 is in a block structure, two opposite surfaces of the rotating seat 213 are respectively connected with the bending knife fixing seat 212 and the fixing block 11, specifically, one end of the rotating seat 213 is in cooperation and rotatable connection with the mounting groove 111, one end of the rotating seat 213 is fixedly connected with the bending knife fixing seat 212, one end of one surface of the rotating seat 213, which is in cooperation and connection with the fixing block 11, is provided with two stepped L-shaped concave portions, the two L-shaped concave portions are in mirror symmetry with the L-shaped concave portions on the mounting groove 111, one end of the upper surface of the rotating seat 213 is concave inwards to form a first concave portion, the first concave portion is in cooperation and connection with the fixing portion, the second concave portion is continuously concave inwards along the first L-shaped concave portion to form a second concave portion, and the opening end of the second concave portion is flush with the adjacent surface of the plane where the second concave portion is located. By the above arrangement, a better assembly between the swivel base 213 and the fixed block 11 is achieved.

In this embodiment, when the rotating seat 213 rotates relative to the fixed block 11, the bending knife fixing seat 212 and the bending knife 211 are driven to rotate, so as to pre-bend the plate, and complete the final bending action after pre-bending, so as to realize bending of the plate, and effectively avoid the problem of damage to the surface of the plate caused by overlarge friction force between the bending assembly and the plate during bending and forming.

In this embodiment, both ends of the same bending component 21 are respectively provided with a rotating seat 213, thereby enabling a bending component 21 to be connected with two different fixing blocks 11, the directions of the L-shaped concave parts on the two rotating seats 213 on the same bending component 21 deviate from each other, the rotating directions of the rotating seats 213 at both ends of the same bending component 21 are the same, when the two rotating seats 213 rotate, the bending knife 211 on one edge is driven to rotate with the bending fixing seat 212, thereby pre-bending a plate, when adjacent bending components are respectively fixed with the same fixing block, the second concave parts on the two rotating seats 213 form mutually avoiding avoidance openings, thereby avoiding collision between the two rotating seats 213 connected with the same fixing block 11, affecting the rotation of the rotating seats 213 and leading to the failure of the normal operation of the die.

In this embodiment, the first mold 3 is fixedly provided with a first stripper plate 31 and a first ejector pin 32 towards one side of the second mold 4, the first stripper plate 31 is disposed at the lower sides of the fixing portion 1 and the bending portion 2, the first ejector pin 32 is disposed at the upper sides of the fixing portion 1 and the bending portion 2, the first ejector pin 32 can stretch or retract, the first ejector pin 32 can provide a downward force to prop against the rotating seat to rotate downwards, the first stripper plate 31 can provide an upward force to enable the rotating seat 213 to reset to the vertical state, and the first ejector pin 32 is retracted when the rotating seat 213 resets to the vertical state. Through setting up first take off board 31 and first knock pin 32, can make the rotation of bending subassembly 21 go on automatically to make production more automatic, reduce the cost of labor, improved production efficiency.

In the embodiment, through the arrangement, the bending function and the cornering function are integrated, so that the use is more convenient, the bending cornering efficiency is greatly improved, the processing precision is effectively ensured, and the use is safe and reliable; meanwhile, the plate can be subjected to pre-bending and pre-wrapping before bending and wrapping, so that the friction between the die and the plate is effectively reduced, and the problems of film breaking, paint dropping and the like on the surface of the plate are avoided; meanwhile, the bending wrap angle die in the embodiment has the advantages of less parts, convenience in disassembly and assembly and more stable quality of processed products.

Example two

In this embodiment, the fixing portion 1 includes a first fixing block 12, the bending portion 2 includes a first bending component 22 and a second bending component 23, and a first mounting groove 116 and a second mounting groove 117 of the first fixing block 12 are respectively connected with the first bending component 22 and the second bending component 23, so that adjacent two sides of the plate material can be subjected to bending wrap angles.

Another working form of the die in this embodiment is: the fixed part 1 further comprises a second fixed block 13, the bending part 2 further comprises a third bending assembly 24, a first mounting groove 116 and a second mounting groove 117 of the second fixed block 13 are respectively connected with the second bending assembly 23 and the third bending assembly 24, and the second bending assembly 23 is connected between the first fixed block 12 and the second fixed block 13, so that two corners are shared by adjacent three sides of the plate material and the adjacent three sides of the plate material, and the bending wrap angle can be formed at the same time.

As shown in fig. 3, in this embodiment, the fixing portion 1 may further include a third fixing block 14 and a fourth fixing block 15, and the bending portion 2 further includes a fourth bending assembly 25, where the fixing block 11 and the bending assembly 21 are connected in a square frame shape. As shown in fig. 3: a first fixed block 12, a second fixed block 13, a third fixed block 14, a fourth fixed block 15, a first bending assembly 22, a second bending assembly 23, a third bending assembly 24, a fourth bending assembly 25 and the like are arranged on one side of the first die 3 facing the second die 4, and the four fixed blocks 11 and the four bending assemblies 21 are connected to form a square frame; in the prior art, some sheet door shells need four-side internal bending processing, four sets of moulds of four devices are required to be operated by four workers respectively, so that not only is the input cost of manpower and equipment and moulds high, but also the size and quality of the internal bending processing formed sheet material are not guaranteed, the bending processing efficiency is low, the qualified finished product capacity of the processing forming is low, and the four sides of the sheet material can be simultaneously bent and wrapped by the arrangement, so that the production efficiency is improved, the modulus of opening is reduced, the production cost is greatly reduced, and meanwhile, the quality of the sheet material is more stable.

In this embodiment, only the connection modes of the fixing blocks 11 and the bending assemblies 21 are illustrated, and the connection modes are not represented, and only the connection modes of the fixing blocks 11 and the bending assemblies 21 can be adopted, in this embodiment, different numbers of fixing blocks and bending assemblies can be selected and set according to the bending wrap angle requirements of the plate products, and different connection modes are selected, so that the same set of dies can meet the processing requirements of different products through adjustment, and the flexibility of the dies is improved.

Example III

For convenience of description, the first mold and the second mold are disposed up and down in this embodiment, which is not meant to represent that the first mold and the second mold can be disposed only up and down.

The embodiment discloses a bending wrap angle method of a bending wrap angle die, which comprises the following steps:

1) The dies start to run, the first die 3 and the second die 4 are reset, and the bending part 2 rotates under the acting force of the first ejector pin 32 on the first die 3;

2) The first die 3 descends, the first stripper plate 31 on the first die 3 presses the plate, the first die 3 continues to descend, and the plate is contacted with the fixing part 1 and the bending part 2;

3) The first die 3 continues to descend, the bending part 2 rotates to reset under the action of the first stripper plate 31 on the first die 3, and the bending part 2 and the fixing part 1 jointly act to perform pre-bending and pre-wrapping on the plate simultaneously;

4) The bending part 2 rotates to a vertical state and does not rotate any more, the die continues to move downwards to enable the bending part 2 and the fixing part 1 to move for a certain distance along the vertical direction, and the bending wrap angle procedure is completed.

In step 4 of the present embodiment, when the die continues to descend, the movement distance of the bending portion 2 and the fixing portion 1 along the vertical direction can be adjusted according to the requirement of the board, in this embodiment, the bending portion 2 and the fixing portion 1 are moved by 3 millimeters (1 material thickness) along the vertical direction, so as to perform a final bending wrap angle procedure on the board.

In this embodiment, the first stripper plate 31 is used to press the area of the plate that is not required to be deformed, so that the plate is not affected in the deformation process, and at the same time, provides an upward force to the rotating seat 213, so that the rotating seat 213 is rotated and reset; the bending part 2 comprises at least one bending component 21, the bending component 21 rotates to pre-bend the plate through a fixed point, when the plate rotates to a vertical state, the plate does not rotate any more, and the vertical movement and the fixed part simultaneously complete the final action of the whole bending; the bending assembly 21 is connected with the first die 3 through a fixing part 1, the fixing part 1 comprises at least one fixing block 11, and a first arc groove 113 is arranged on the fixing block 11 and is used as a fixing point of the bending assembly, so that the bending assembly 21 rotates; the second circular arc groove 114 arranged on the fixed block 11 contacts with the plate to finish the final wrap angle of the plate, and the horn-shaped opening 115 is arranged at the lower end of the second circular arc groove 114 to contact with the plate to realize the pre-wrap angle.

In this embodiment, the operation process of the mold is described in detail by using the refrigerator door shell plate, and the mold is not represented to be only used on the refrigerator door shell plate, and the bending wrap angle mold and the bending wrap angle method in the invention can be applied to any plate needing bending wrap angle.

In this embodiment, when the bending wrap angle mold of the refrigerator door shell is used, the first mold 3 and the second mold 4 are reset, the rotary seat 213 rotates downwards by a certain angle under the downward acting force of the first ejector pin 32, and then the refrigerator door shell is placed in the female mold of the second mold 4, and at this time, the bending assembly 21 is far away from the refrigerator door shell; the first die 3 is driven to move downwards, the first stripper plate 31 compresses the refrigerator door shell, the first die 3 moves downwards continuously, the plate is contacted with the horn-shaped opening 115 and the bending knife 211 on the fixed block 11, the first die 3 moves downwards continuously, the first stripper plate 31 is contacted with the rotating seat 213, the first stripper plate 31 gives the rotating seat 213 an upward acting force, under the action of the first stripper plate 31, the rotating seat 213 rotates upwards, and simultaneously the bending knife 211 and the bending knife fixing seat 212 are driven to rotate towards the direction close to the refrigerator door shell, the refrigerator door shell plate is pre-bent, and meanwhile the horn-shaped opening 115 pre-wraps the refrigerator door shell plate; the mold continues to move downwards, and when the rotating seat 213 rotates to be in a vertical state, the first mold 3 continues to move downwards the bending part 2 and the fixing part 1 for 3mm along the vertical direction, so that the bending wrap angle procedure is completed.

When the refrigerator door shell plate is produced by the bending wrap angle method, the bending part rotates and the fixing part simultaneously complete the pre-bending and pre-wrap angle of the refrigerator door shell plate, at the moment, the gap between the bending cutter and the concave die is far larger than one material thickness, so that the friction on the surface of the plate is smaller, when the rotating seat rotates to be in a vertical state, the second arc-shaped groove of the fixing part starts to contact with the plate, at the moment, the gap between the bending cutter and the concave die is 1 material thickness, the friction force born by the refrigerator door shell plate starts to be larger, and the bending assembly and the fixing part start to run for 3mm along the vertical direction to complete the final action of the bending wrap angle; in the whole forming process, the distance that only the plate with the round corner is subjected to larger friction force is very short by 3mm, so that the problems of large-area film breaking, paint dropping and film breaking of bending caused by the plate with high surface requirement by using a traditional bending die are solved, and the assembly performance and the appearance quality of the plate are greatly improved.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.

Claims (7)

1. The utility model provides a wrap angle mould of bending, includes relative first mould and the second mould that sets up, and first mould installs portion of bending and fixed part towards second mould one side, its characterized in that: the fixing part is fixedly connected with the first die, and the bending part is rotatably connected with the fixing part;

the fixing part comprises four fixing blocks, the four fixing blocks are positioned at four corners of the square, a bending assembly is respectively arranged between every two adjacent fixing blocks, and two ends of the bending assembly are respectively and rotatably connected with the fixing blocks at the corresponding ends;

mounting grooves are respectively formed in two adjacent side surfaces of the fixed block, and the bending assembly is rotationally connected with the fixed block through the mounting grooves;

one side of the mounting groove, which is close to the intersection line of the adjacent side surfaces, is an inclined surface which is inclined from bottom to top towards the direction close to the intersection line;

the intersection line of the adjacent side surfaces of the fixed block is provided with a second arc groove recessed into the fixed block, the lower end of the second arc groove is a horn-shaped opening which gradually increases in width from top to bottom, and the horn-shaped opening is contacted with the plate to realize a pre-wrap angle;

the second arc groove contacts with the plate to finish the final wrap angle of the plate;

a first stripper plate and a first ejector pin are arranged on one side, facing the second die, of the first die, the first stripper plate is arranged on the lower sides of the fixing part and the bending part, and the first ejector pin is arranged on the upper sides of the fixing part and the bending part;

the bending part rotates and the fixing part simultaneously complete the pre-bending and pre-wrapping of the plate, the bending part rotates to be in a vertical state and does not rotate any more, and the die continues to move the bending part and the fixing part downwards for a certain distance along the vertical direction, so that the bending and wrapping procedure is completed.

2. The bending corner die of claim 1, wherein: square grooves which are concave towards the inside of the fixed block are respectively arranged on two adjacent side surfaces of the fixed block, and the two square grooves respectively form a first mounting groove and a second mounting groove.

3. The bending corner die of claim 1, wherein: the mounting groove is located and keeps away from adjacent side intersecting line, and keeps away from second mould department, and adjacent side intersecting line is the connecting wire of the both sides face that is equipped with the mounting groove on the fixed block.

4. The bending corner die of claim 1, wherein: the intersection of the inclined surface side and the lower side of the mounting groove is provided with a first arc groove which is concave towards the inside of the fixed block.

5. A bending corner die according to any one of claims 1 to 4, wherein: the bending assembly comprises a rotating seat, a bending cutter and a bending cutter fixing seat; the rotating seat is in a block-shaped structure; two opposite ends of the rotating seat, one end of which is matched with the mounting groove and can be rotatably connected, and the other end of which is fixedly connected with the bending knife fixing seat; the bending knife is arranged on the bending knife fixing seat.

6. The bending corner die of claim 5, wherein: the cross section of the bending knife fixing seat is rectangular, one end part of the bending knife fixing seat, which is close to the second die, is inwards concave and is provided with an inverted L-shaped concave groove, and the bending knife is arranged in the groove.

7. A method of bending a corner die according to any one of claims 1 to 6, wherein:

specifically comprises the following steps of,

1) The die starts to run, the first die and the second die are reset, and the bending part rotates under the action force of a first ejector pin on the first die;

2) The first die descends, a first stripper plate on the first die presses a plate placed on the second die, the first die continues to descend, and the plate is contacted with the fixing part and the bending part;

3) The first die continues to descend, the bending part rotates to reset under the action of the first stripper plate on the first die, and the bending part and the fixing part jointly act to perform pre-bending and pre-wrap angle on the plate simultaneously;

4) The bending part rotates to a vertical state and does not rotate any more, the die continues to move the bending part and the fixing part downwards for a certain distance along the vertical direction, and the bending wrap angle procedure is completed.

Images