CN210023506U - Stand wear and tear bender and bed die thereof - Google Patents

Abstract

The utility model discloses a stand wear and tear bender and bed die thereof belongs to the bender field. The bending die comprises an upper die and a lower die. The lower die comprises a lower die body, a wear-resistant piece and a limiting guide assembly, wherein the wear-resistant piece is arranged on the lower die body, and the wear-resistant piece can be replaced at any time when the upper die and the lower die are bent; the limiting guide assembly is arranged on one side of the lower die body, opposite to the wear-resistant part, and used for preventing dislocation of the upper die during working with the lower die. The utility model discloses can once bend overlength sheet metal's tip, prevent that the lower mould is local impaired and change whole lower mould, prevent simultaneously that the lower mould compound die in-process from misplacing, still have simple structure, reasonable in design, easily manufactured advantage.

Description

Stand wear and tear bender and bed die thereof

Technical Field

The utility model belongs to the mould field of bending, more specifically say, relate to a stand wear and tear bender and bed die thereof.

Background

The bending machine is a general mechanical device for bending various metal plates, and is matched with a bending machine die to bend the plates. The bending machine die comprises an upper die and a lower die of a bending machine and is used for stamping and forming and separating a plate, the die for forming is provided with a cavity, and the die for separating is provided with a cutting edge. The lower die is generally a cuboid, and notches with various sizes can be formed in the lower die, and the sizes of the notches are different according to needs. In the process of bending the plate, the upper die and the lower die are matched according to the bending angle and the shape of the plate, and are replaced timely. Generally, a bending machine die can be composed of various parts, different dies are composed of different parts, and the processing of the appearance of an object is realized mainly through the change of the physical state of a formed material, so that a blank is formed into a tool with a specific shape and a specific size under the action of the pressure of a bending machine.

Furthermore, some sheet materials need to be bent at the end portions thereof, and sometimes the bending operation is performed at the end portions of the sheet materials at different bending angles a plurality of times. Among the prior art, the shape of bending the sheet material is various, need be to several meters in many occasions, and even when several tens meters's sheet material one end or both ends were bent locally, as the sheet material of bending shown in fig. 8, this kind of sheet material is longer relatively, and when adopting current mould of bending to carry out tip local bending, sheet material self weight can make the position atress of bending uneven to it is serious to lead to long-time use mould local wear of bending, then needs whole change mould, and the cost is higher.

For example, chinese patent application No. 201510971078.2, filed 2016, 5, 25 discloses a method for bending a door jamb. The mould of bending that this patent adopted includes mould on lower mould, the right angle, mould on the 45 degrees, the hem mould and the mould of flattening, and the step of bending is: selecting a material and marking a mark; folding a plurality of right-angle sections by using a right-angle upper die; processing a flanging bulge by using a flanging upper die; then, folding a right-angle section by using a right-angle upper die; and then pre-bending by using a 45-degree upper die, and finally flattening the pre-bent angle by using a flattening upper die to process a door frame workpiece. According to the door frame bending method, the bending die is reasonable in structural design, the upper die and the lower die are good in matching performance, the processing sequence is reasonable in arrangement, the interference phenomenon cannot occur in the processing process, the processing efficiency is high, the processed door frame is tight in seam combination, and the sound insulation effect is good. However, the bending method disclosed by the patent needs to replace different dies to bend the plate in different positions and shapes, alignment and calibration work needs to be performed once for each bending work, the working efficiency is low, the steps are complicated, and the method is not suitable for mass production.

Meanwhile, the existing mold is generally fixed on the lower mold, the upper mold moves up and down relative to the lower mold to complete the bending operation, and the local bending stress of the end part of the longer sheet is uneven, so that the upper mold is subjected to the action of horizontal thrust, the matching precision of the upper mold and the lower mold is influenced, and the quality of the bent sheet is reduced.

For another example, a publication of a patent with chinese patent application No. 201721772066.8, published as 2018, 7 and 10 discloses a punching die for punching and bending two ends of an inverter bracket. This patent mould includes lower bolster and cope match-plate pattern, the die insert is all installed to the inner wall left and right sides of lower bolster, the die is installed to the inner wall bottom of die insert and is pushed away the core, the terrace die is installed to the bottom of cope match-plate pattern, the ram rod is all installed to the bottom left and right sides of terrace die, the die pushes away the inner wall left and right sides of core and all installs a punching press section of thick bamboo, the die pushes away the inner wall central point of core and puts and install the cylinder body, the barrel is installed to the inner wall of cylinder body, cassette and closure plate are installed respectively at both ends about the inner wall of barrel, the piston plate is installed to the inner chamber of barrel. The die is used for punching the inverter bracket and bending the two ends of the inverter bracket, and the inverter bracket is more convenient to take out after being processed through the matching of the barrel, the lifting plate and the lifting rod, so that the working efficiency of operators is greatly improved. However, this die is suitable for bending both ends of a plate material that is not too long, and for a plate material that is long as a whole and has small bending lengths at both ends, bending both ends at the same time using this die results in a plate material that does not require a twisting force at the middle portion of the bending, and the middle portion of the plate material is easily deformed due to a long arm of force, resulting in damage to the bent plate material, which wastes labor and resources.

In addition, for a longer plate with a plurality of bending sections at the end, the plate is bent for a plurality of times, so that on one hand, the efficiency is low, interference is easy to generate, and on the other hand, the accumulated error is large, and the bending precision is difficult to control. Therefore, in order to reduce the number of bending times, to apply to the plate materials of various lengths, and to save cost and labor, a bending machine die having a simple structure and wide applicability has been developed to perform one-time bending and molding of the end portions of the plate materials of various lengths, which has become a problem to be solved.

Disclosure of Invention

1. Problems to be solved

The utility model provides a stand wear and tear bender and bed die thereof, its aim at solve current bender when bending to longer sheet material tip, the serious problem of local wear.

The utility model relates to a stand wear and tear bender still further solves the tip part of longer sheet material when bending, goes up the mould and receives horizontal thrust effect and influences the problem of the precision of bending.

The utility model relates to a stand wear and tear bender further solves the efficiency and the precision problem that longer sheet material tip was bent many times.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A lower die groove is formed in a lower die body, an installation position is arranged on the lower die body and used for installing a wear-resistant part with a working surface, the working surface of the wear-resistant part is used as a part of a bending working surface of the lower die groove, the wear-resistant part is preferably a right-angle trapezoidal block and is located at the position where the lower die is worn most in the bending operation.

Furthermore, the wear-resistant part is detachably connected with the lower die body through bolts.

Furthermore, a limiting guide assembly for limiting the transverse deviation of the upper die is arranged on one outer side of the lower die body.

Furthermore, spacing direction subassembly include mount pad and guide, the mount pad including the erection segment that is located its lower extreme and the support section that is located its upper end, the lower mould body is connected to the erection segment of mount pad lower extreme, the guide is installed on the support section of the upper end of mount pad, the guide is used for carrying out spacing direction to the mould in the operation of bending.

The installation section and the support section are of an integral structure or fixedly connected, the installation section fixedly connects the limiting guide assembly to the lower die body, and the support section is used for installing the guide piece.

Furthermore, the guide piece is made of wear-resistant materials, and the wear-resistant block is fixed on the bending machine frame or is fixedly arranged on the supporting section.

Furthermore, the guide part adopts a round shaft, a support is arranged on the support section, and two ends of the support are supported and installed on the support through bearings.

A wear-resistant bending die comprises an upper die and a lower die which are matched for use, wherein the lower die comprises a lower die body and a wear-resistant piece, a lower die groove is formed in the lower die body, the wear-resistant piece is installed at the position where the wear of the lower die body is maximum, and the working surface of the wear-resistant piece is used as one part of the bending working surface of the lower die groove; the lower die further comprises a limiting guide assembly, the limiting guide assembly is positioned on one outer side of the lower die body, namely one side opposite to the wear-resistant part, and the limiting guide assembly comprises a guide part for preventing the upper die from transversely deviating, a supporting section for fixedly mounting the guide part and a mounting section for connecting the lower die body and the limiting guide assembly; the upper die and the lower die are matched for use.

Further, the lower die groove of the lower die body comprises a V-shaped groove formed by a third profile and a fourth profile, the working surface of the wear-resistant part is completely or partially overlapped with the fourth profile, the completely overlapped working surface of the wear-resistant part is the fourth profile, and the partially overlapped working surface of the wear-resistant part is connected with the fourth profile and is on the same surface.

Furthermore, the lower die groove of the lower die body further comprises a first molded surface and a second molded surface which are close to the side of the limiting guide assembly, and the first molded surface, the second molded surface and the third molded surface are sequentially connected end to end; in the bending operation, the first molded surface corresponds to the end part of the bent edge of the workpiece. The first molded surface and the second molded surface are connected through arcs, and the second molded surface and the third molded surface are connected through arcs, so that the impression on the workpiece is reduced.

Further, contained angle α between first profile and the second profile is obtuse angle or right angle, the second profile is located the horizontal plane, contained angle β between second profile and the third profile is obtuse angle or right angle, contained angle (theta + lambda) between third profile and the fourth profile is acute angle or right angle.

Preferably, the included angle between the first profile and the second profile is an obtuse angle, and the second profile is parallel to the horizontal plane.

Furthermore, the cutting edge of the upper die comprises a first cutting edge surface, a second cutting edge surface, a third cutting edge surface, a fourth cutting edge surface and a fifth cutting edge surface which are sequentially connected, wherein the first cutting edge surface is connected with the second cutting edge surface through an arc surface, and the fourth cutting edge surface is connected with the fifth cutting edge surface through an arc surface, so that sharp corners formed between the first cutting edge surface and the second cutting edge surface and between the fourth cutting edge surface and the fifth cutting edge surface are prevented from generating obvious indentation on a workpiece; and when the upper die and the lower die are assembled, the second cutting edge surface, the third cutting edge surface, the fourth cutting edge surface and the fifth cutting edge surface of the upper die are respectively parallel to the first molded surface, the second molded surface, the third molded surface and the fourth molded surface of the lower die and/or the working surface combination of the wear-resistant piece, and the lengths of the working surfaces are equal.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the detachable wear-resistant part is arranged at the maximum abrasion part of the lower die body, generally, the maximum stress part on the lower die is most easily abraded to cause the whole lower die to be unusable, and the upper die and the lower die of the bending die are generally large in size, so that the labor intensity for replacing the whole lower die is high, and the cost is high; moreover, because the lower die of the utility model is used for bending the end part of the overlong plate, the position of the plate close to the bending part has the maximum relative stress point, and the corresponding position of the lower die is the maximum stress position, therefore, the maximum stress position on the lower die is provided with a detachable wear-resistant part, the wear resistance of the part with local wear is improved, and the service life of the die is prolonged; on the other hand, even if the wear-resistant part is worn in the long-time working and using process, the wear-resistant part can be directly replaced without replacing the whole lower die, so that the cost is saved, the service life of the lower die is prolonged, and the working efficiency of enterprises is improved;

(2) the wear-resistant part and the lower die body of the utility model can be detachably mounted through the bolt, so that the wear-resistant part can be conveniently detached and replaced;

(3) the utility model discloses lower mould body one side of bed die sets up spacing direction subassembly, spacing direction subassembly sets up in being close to work piece bending section tip simultaneously, because the work piece is longer, and the bending section of its tip is shorter and the bending shape is more complicated, when the bed die is bent work downwards, the bed die can receive the horizontal component force that the work piece gave it, and make the bed die calibration dislocation, influence the bending precision of work piece, therefore, spacing direction subassembly can have reverse power to the bed die and offset the horizontal force, avoid the bed die to take place the horizontal skew, guarantee the bending precision of work piece;

(4) the guide piece of the limiting guide assembly adopts the round shaft, the two ends of the round shaft are installed on the installation seat through the bearings, when the upper die moves downwards, the round shaft is in rolling contact with the upper die, the round shaft rotates around the support on the installation seat, and when the transverse force of the upper die is eliminated, the hard friction force between the round shaft and the upper die is converted into rolling friction, so that the friction and the abrasion of the upper die are reduced, the working noise is reduced, the bending power of the upper die is reduced, and the service life of the upper die is prolonged;

(5) the bending die of the utility model can bend a plurality of parts at one time without accumulated errors, thereby improving the working efficiency and the bending precision of the bending piece;

(6) the utility model discloses a bender simple structure, reasonable in design easily makes.

Drawings

FIG. 1 is a schematic structural view of a bending die of the present invention;

FIG. 2 is a view showing a state of the bending die before bending a workpiece;

FIG. 3 is a using state diagram of the bending die assembly of the utility model;

fig. 4 is a front view of the upper die of the present invention mounted on a bending machine;

FIG. 5 is a schematic structural view of the lower mold of the present invention

Fig. 6 is a schematic structural view of the lower die body of the present invention;

fig. 7 is a schematic structural view of the limiting and guiding assembly of the present invention;

FIG. 8 is a schematic structural view of a workpiece bent by using the bending die of the present invention;

in the figure:

1. an upper die; 101. a first land surface; 102. a second land surface; 103. a third land surface; 104. a fourth land surface; 105. a fifth land surface; 2. a lower die; 3. a lower die body; 301. a first profile; 302. a second profile; 303. a third profile; 304. a fourth profile; 305. an installation position; 306. a platform; 307. a first side surface; 308. a second side surface; 4. a wear part; 401. a working surface; 5. a limiting guide component; 501. a mounting seat; 502. a guide member; 503. a support; 6. and (5) a workpiece.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

The wear-resistant lower die comprises a lower die body 3, a wear-resistant piece 4 and a limiting guide assembly 5, wherein a bending groove is designed on the lower die body 3 according to the bending shape of a required workpiece 6, so that a plurality of positions can be bent at one time, accumulated errors are avoided, and the working efficiency and the bending precision of the bent piece are improved; the position of the bending tail end A or B of the workpiece 6, which corresponds to the bending groove, is provided with the wear-resistant part 4, the wear-resistant part 4 of the embodiment is specifically arranged at a position close to the second side surface 308, and comprises a working surface 401, and the working surface 401 is used as a part of the bending groove; the limit guide assembly 5 is disposed on an outer side of the lower die body 3, and in this embodiment, the limit guide assembly 5 is disposed on the lower die body 3 at a position of the first side surface 307, and is used for offsetting a transverse force applied by the workpiece 6 to the upper die 1, wherein the transverse force is expressed as a force perpendicular to the bending movement direction.

In the specific embodiment, as shown in fig. 6, four side surfaces of a lower die body 3 are a first side surface 307, a top surface, a second side surface 308 and a bottom surface respectively, the second side surface 308 of the lower die body 3 is connected and perpendicular to a platform 306 on the top surface, the first side surface 307 of the lower die body 3 is perpendicular to the bottom surface and connected with a first profile 301 on the top surface, a lower die groove and a horizontal platform 306 are sequentially arranged on the top surface of the lower die body 3, wherein the groove surfaces of the lower die groove comprise the first profile 301, the second profile 302, the third profile 303 and a fourth profile 304 which are sequentially connected, the first profile 301 and the second profile 302 are connected through an arc, and form an included angle α equal to 117 degrees, similarly, the second profile 302 and the third profile 303 are connected through an arc, and form an included angle β equal to 153 degrees, the third profile 303 and the fourth profile 304 are directly intersected to form an included angle of 88 degrees, specifically, the third profile 303 and the vertical surface form an included angle θ equal to 62 degrees, the fourth profile 304 and the vertical surface form a λ equal to 26 degrees, the λ degrees, the fourth profile 304 is connected to the lower die body, the lower die body is connected with a detachable wear-resistant part, the wear-resistant part is convenient to be detached, the wear-resistant part can be detached, the wear-resistant part can be replaced, the wear-resistant part can be used, the wear-resistant part can be replaced.

In actual production, the bottom surface of the mounting position 305 may also be directly connected to the third profile 303, that is, the working surface 401 of the wear-resistant member 4 completely coincides with the fourth profile 304, and after the wear-resistant member 4 is fixed in the mounting position 305, the working surface 401 of the wear-resistant member 4 is connected to the third profile 303 and forms an included angle of 88 °.

It is worth to say that, the wear-resistant part 4 improves the wear resistance of the local worn part of the lower die 2, prolongs the service life of the lower die 2, and even if the long-time bending work is performed, when the wear-resistant part 4 (the point with large stress) of the lower die 2 is seriously worn, the wear-resistant part 4 can be replaced at any time, the whole lower die 2 does not need to be replaced, the bending work can be continued, the cost is saved, and the service life of the lower die is prolonged.

Meanwhile, a limiting guide assembly 5 is further arranged at the position close to the first side surface 307 of the lower die body 3. Spacing guide assembly 5 includes a mount pad 501 and guide 502, and mount pad 501 includes the installation section and supports the section, and the installation section is connected spacing guide assembly 5 in the side of lower mould body 3, supports the section and goes up the installation and avoid going up mould 1 and take place lateral shifting's guide 502, and guide 502 adopts wear-resisting piece to be fixed in on the support section. When the upper die 1 moves downwards and contacts the workpiece 6, the end surface of the guide 502 facing the first side surface 307 is just contacted with the side surface of the upper die 1, and when the upper die 1 continues to move downwards, the guide 502 is always contacted with the side surface of the upper die 1, so that the transverse force applied by the workpiece 6 on the upper die 1 is offset, the upper die 1 is prevented from transversely shifting, and the bending precision of the workpiece is ensured.

Further, in order to reduce the hard friction between the guide 502 and the upper die 1, a circular shaft is used as the guide 502, and the above hard friction is converted into rolling contact; as shown in fig. 5, the mounting section is fixedly connected to the lower die body 3 at a first side surface 307 by a bolt, the supporting section is perpendicular to the mounting section, a support 503 is fixedly disposed at a position of the upper end of the supporting section facing to one side of the lower die body 3 for sleeving a circular shaft, and two ends of the supporting section are fixed to the support 503 of the supporting section by bearings, and the circular shaft can freely rotate on the support 503.

As shown in fig. 2, when the upper die 1 moves downward and contacts the workpiece 6, the surface of the circular shaft facing the first side surface 307 is just in contact with the side surface of the upper die 1, and when the upper die 1 continues to move downward, the circular shaft always makes rolling contact with the side surface of the upper die 1 and rotates around the support 503, so that friction and abrasion between the upper die 1 and the guide 502 are reduced, working noise is reduced, bending power of the upper die is reduced, and the service life of the upper die 1 is prolonged.

Example 2

As shown in fig. 1, a wear-resistant bender of the present embodiment includes an upper die 1 and a lower die 2, and the lower die 2 of the present embodiment is substantially the same as the lower die 2 of the embodiment 2, as shown in fig. 5.

The upper die 1 of the present embodiment is also made of 42CrMo die steel and has a rectangular parallelepiped shape. The specific structure of the upper mold 1 is clearly visible in fig. 1. Specifically, the bottom surface of the upper die 1 is a cutting edge, the cutting edge of the cutting edge is formed by connecting a first cutting edge surface 101, a second cutting edge surface 102, a third cutting edge surface 103, a fourth cutting edge surface 104 and a fifth cutting edge surface 105 in sequence, and the second cutting edge surface 102, the third cutting edge surface 103, the fourth cutting edge surface 104 and the fifth cutting edge surface 105 are parallel to and equal in length to the first profile surface 301, the second profile surface 302, the third profile surface 303 and the working surface 401 of the wear-resistant part 4 of the lower die 2 in sequence.

The first cutting edge surface 101 and the second cutting edge surface 102 are connected through an arc surface with the radius of 8mm, so that sharp corners formed between the first cutting edge surface 101 and the second cutting edge surface 102 are prevented from generating obvious indentation on the workpiece 6; the second cutting edge surface 102, the third cutting edge surface 103 and the fourth cutting edge surface 104 are connected in sequence; the fourth cutting edge surface 104 and the fifth cutting edge surface 105 are connected through an arc surface with the radius of 6mm, so that a sharp corner formed between the fourth cutting edge surface 104 and the fifth cutting edge surface 105 is prevented from generating obvious indentation on the workpiece 6; the fifth cutting edge surface 105 is connected to one side surface of the upper die 1, and the first cutting edge surface 101 is connected to the other side surface of the upper die 1, thereby forming a rectangular parallelepiped upper die 1 having a cutting edge on the bottom surface.

As shown in fig. 4, the upper die 1 is fixed on the bending machine, and the positions of the upper die and the lower die are calibrated, as shown in fig. 2; when the upper die 1 descends and contacts the workpiece 6, the surface of the guide 502 facing the first side surface 307 just starts to contact with the side surface of the upper die 1, and as the upper die 1 continues to descend, the guide 502 always contacts the side surface of the upper die 1, and the guide 502 rotates around the support 503 until the upper die 1 and the lower die 2 are matched; after opening the die, the other end of the workpiece, which is not bent, is placed on the work surface of the lower die 2, and the above bending work is repeated, as shown in fig. 3.

After the bending work of both ends of the workpiece 6 is completed, the workpiece 6 shown in fig. 8 is obtained.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a stand wear and tear bed die, sets up die cavity, its characterized in that on bed die body (3): the lower die comprises a lower die body (3) and is characterized in that a wear-resistant part (4) with a working surface (401) is mounted on the lower die body (3), and the working surface (401) of the wear-resistant part (4) is used as a part of a bending working surface of a lower die groove and is located at the position where the lower die (2) is worn most in the bending operation.

2. A wear resistant lower die as set forth in claim 1 wherein: the wear-resistant part (4) is detachably connected with the lower die body (3) through bolts.

3. A wear resistant lower die according to any one of claims 1 or 2, wherein: and a limiting guide assembly (5) for limiting the transverse deviation of the upper die (1) is arranged on one outer side of the lower die body (3).

4. A wear resistant lower die as set forth in claim 3 wherein: the limiting guide assembly (5) comprises an installation seat (501) and a guide piece (502), the lower end of the installation seat (501) is installed on the lower die body (3), the guide piece (502) is installed at the upper end of the installation seat (501), and the guide piece (502) is used for limiting and guiding the upper die (1) in the bending operation.

5. A wear resistant lower die as set forth in claim 4 wherein: the guide piece (502) is made of wear-resistant materials.

6. A wear resistant lower die as set forth in claim 4 wherein: the guide piece (502) adopts a round shaft, and two ends of the round shaft are supported and installed through bearings.

7. The utility model provides a stand wear and tear bender, includes last mould (1) and bed die (2) that cooperate and use, its characterized in that: the lower die (2) is the lower die (2) according to any one of claims 1 to 6.

8. A wear-resistant bender according to claim 7, characterized in that: the lower die groove of the lower die body (3) comprises a V-shaped groove formed by a third profile (303) and a fourth profile (304), and the working surface (401) of the wear-resistant piece (4) is used as a part or the whole of the fourth profile (304).

9. A wear-resistant bender according to claim 8, characterized in that: the lower die groove of the lower die body (3) further comprises a first molded surface (301) and a second molded surface (302) which are close to the side of the limiting guide assembly (5), and the first molded surface (301), the second molded surface (302) and the third molded surface (303) are sequentially connected end to end; in the bending operation, the first molded surface (301) corresponds to the end part of the bent edge of the workpiece.

10. The abrasion-resistant bender according to claim 9, wherein the angle α between the first profile (301) and the second profile (302) is an obtuse angle or a right angle, the second profile (302) is in a horizontal plane, the angle β between the second profile (302) and the third profile (303) is an obtuse angle or a right angle, and the angle between the third profile (303) and the fourth profile (304) is an acute angle or a right angle.

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