CN214022761U - Forming die applied to local bent part of rail transit vehicle body - Google Patents

Abstract

The utility model discloses a be applied to forming die of the local piece of buckling of track traffic automobile body belongs to machining equipment technical field. The device comprises an upper die mechanism and a lower die mechanism, wherein the upper die mechanism comprises an upper male die; the lower die mechanism comprises a first female die, a second female die, a stripper plate and a lower die body, a die cavity is formed in the lower die body, the first female die and the stripper plate are telescopically connected in the die cavity, the second female die slides along the inner wall of the die cavity through an inclined surface, and meanwhile, a positioning part is arranged on the side surface of the second female die and is clamped between the first female die and the stripper plate; when the die is closed, the upper male die, the first female die and the second female die are matched to form a bending space. The utility model discloses can process the part piece of buckling, and be convenient for take off the material.

Description

Forming die applied to local bent part of rail transit vehicle body

Technical Field

The utility model belongs to the technical field of machining equipment, more specifically say, relate to a be applied to forming die of the local piece of buckling of rail transit car body.

Background

With the development of world economy, the rail transit industry is also rapidly developing, and rail transit car bodies need parts with different bending shapes to meet the requirements of assembly. The requirement for the sheet metal structure part with the local bending part is increased year by year, the local bending part is a protruding structure formed by stamping the sheet metal structure part and can be used as a buckling part on the sheet metal structure part, so that the bending forming die of the sheet metal structure part of the rail transit vehicle body is used as key equipment of a vehicle body processing technology, is widely applied to the manufacturing fields of rail transit vehicle bodies such as motor cars, high-speed rails and subways and various vehicles, and has a wide application space.

For the sheet metal part which is bent locally and is bent in multiple ways, the bent convex part can be welded to the sheet metal part body in a welding mode so as to realize a locally convex bending structure, but the overall structural strength of the welding structure is not as strong as that of the bent workpiece. In order to reduce the number of welding seams and improve the structural strength of workpieces, the bent workpieces are adopted to replace welded workpieces, so that the protective performance of the workpieces in use can be improved, and the appearance of the workpieces is more attractive. However, in the existing bending die, a workpiece is stamped into a groove of a lower die to form a convex bending part, and the hook-shaped and convex local bending part is not easy to form, and the problem that the material is removed after forming is difficult to solve is solved.

For example, chinese patent application No. 201410196252.6, published as 2015, 5-6, discloses a device for bending a metal sheet at multiple angles. The device top die consists of a plurality of die plates, wherein the lower end of each die plate is provided with a bending die head, the lower end surface of the bending die head is provided with a stamping surface, any section of the stamping surface is an upward-concave arc surface, and the arc radiuses and the arc lengths of the stamping surfaces of the plurality of die plates are equal; the bottom die is provided with an open bending square groove, two side surfaces of the bending square groove are perpendicular to the working table surface, a deformation groove is respectively formed in the bottom surface of the bending square groove downwards along the two side surfaces of the bending square groove, a bearing surface is formed on the bottom surface between the two deformation grooves, and any section of the bearing surface is an upwardly arched arc surface; the arc radius and the arc length of the stamping surface are respectively equal to those of the bearing surface. However, the bottom structure of the bending square groove of the die is not easy to strip, and the groove bottom is opposite to the opening and is not easy to form the hook-shaped convex bending part.

For another example, a patent application with chinese patent application No. 201820771039.7 and published as 2018, 12 and 28 discloses a bending die. This patent mould includes die shank, convex die board, die board and the subassembly of bending, and the die shank is used for being connected with stamping equipment, convex die board and die shank rigid coupling, and the die board is located the below of convex die board, is formed with between convex die board and the die board to be used for with product shape assorted chamber, the subassembly of bending is located the die board, the subassembly of bending is used for making the multichannel limit of product bend when the compound die. However, this mold cannot form the hook-shaped convex bent portion.

For the hook-shaped local convex bending part, the forming processing has the following difficulties: firstly, the convex bending part is convex relative to the part which does not need to be bent and is in a hook shape, if the part is bent for multiple times, the bending precision can not be ensured, and the part which does not need to be bent is easy to damage; on the other hand, if a bending die wants to bend bending pieces with different angles, the upper die or the lower die needs to be replaced to meet the requirement of the forming shape, so that the die is special, and when the batch of workpieces are machined, the die is idle, so that the cost is increased; finally, the existing mould formed by bending once is not easy to strip materials for the hook-shaped structure.

Therefore, a forming die applied to local bent parts of a rail transit vehicle body is urgently needed in the market, and the forming die can adapt to the processing of sheet metal parts which are of multiple sizes and have bent parts protruding like hooks.

Disclosure of Invention

1. Problems to be solved

The utility model provides a be applied to forming die of the local piece of buckling of track traffic automobile body, its aim at solve current mould and can not process the problem that has the local class hook-like work piece of buckling, solve the problem that is difficult for taking off the material simultaneously.

2. Technical scheme

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

A forming die applied to a local bent part of a rail transit vehicle body comprises an upper die mechanism and a lower die mechanism, wherein the upper die mechanism comprises an upper male die, and the shape of the lower end surface of the upper male die is consistent with that of a local bent part to be machined on a workpiece; the lower die mechanism comprises a first female die, a second female die, a stripper plate and a lower die body, a die cavity is formed in the lower die body, the first female die and the stripper plate are telescopically connected in the die cavity, the second female die slides along the inner wall of the die cavity through an inclined surface, and meanwhile, a positioning part is arranged on the side surface of the second female die and is clamped between the first female die and the stripper plate; when the die is closed, the upper male die, the first female die and the second female die are matched to form a bending space.

Furthermore, the die cavity is of an open structure and is composed of a first working surface, a second working surface, a third working surface, a fourth working surface, a fifth working surface, a sixth working surface and a seventh working surface which are sequentially connected, the first working surface and a horizontal plane form a certain angle, namely an inclined plane, and the second female die slides along the first working surface.

Further, terminal surface is gone up including the shaping face on the first shaping face that meets in proper order, second, shaping face on the third, shaping face on the fourth and the shaping face on the fifth on the epirelief mould, wherein, shaping face is parallel to each other on first shaping face, the third and the fifth on the shaping face, the contained angle that forms between shaping face on first last shaping face and the second is the acute angle, the contained angle that forms between shaping face on the fourth and the third is the obtuse angle.

Furthermore, the first upper molding surface and the second upper molding surface are connected through arc surfaces, and the second upper molding surface and the third upper molding surface are connected through arc surfaces.

Furthermore, the upper end of the upper male die is provided with a clamping part which is fixedly connected with a bending machine.

Furthermore, a cutter head part is arranged at the upper part of the side surface of the second female die, and the cutter head part is inserted between the first upper forming surface and the second upper forming surface in a matched mode during die assembly.

Furthermore, the first female die and the stripper plate are respectively connected with the die cavity through elastic parts.

Further, the elastic component is a spring.

Furthermore, the second concave die is connected with the track in a sliding mode through the sliding block, and the second concave die slides along the inner wall of the die cavity.

3. Advantageous effects

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

(1) the forming die of the utility model is used for processing the local bending part applied to the rail transit vehicle body, the bending part of the forming die is locally convex and forms a hook-shaped structure, meanwhile, the concave dies are movably connected, the concave dies are closely connected during die assembly, and the concave dies are separated during die opening, thereby facilitating the stripping;

(2) when the forming die is in a die assembly state, an avoidance space is arranged at the arc position where the second upper forming surface of the upper male die is connected with the third upper forming surface, so that a corresponding arc mechanism on a workpiece is prevented from being damaged;

(3) in the forming die of the utility model, the second concave die slides along the inner wall of the die cavity through the inclined plane, namely the second concave die is attached to the first working surface of the die cavity and is set to be in inclined plane contact, so that the second concave die can generate longitudinal displacement and also generate transverse displacement; and the second concave die and the first working surface are connected with the track through the sliding block, so that the second concave die can slide and also play a role in positioning.

Drawings

FIG. 1 is a schematic structural view of a local bent part after being processed by using the forming mold of the present invention;

fig. 2 is a schematic structural view of the forming mold of the present invention;

FIG. 3 is a schematic structural view of an upper male die in the forming die of the present invention;

fig. 4 is a schematic structural view of a first concave die in the forming die of the present invention;

fig. 5 is a schematic structural view of a second concave die in the forming die of the present invention;

fig. 6 is a schematic structural view of the lower mold body in the molding mold of the present invention;

FIG. 7 is a view showing a usage state of the forming mold of the present invention when the forming mold is closed;

FIG. 8 is a view showing a usage state of the forming mold when the mold is opened;

in the figure:

100. an upper die mechanism; 110. an upper male die; 111. a first upper molding surface; 112. a second upper molding surface; 113. a third upper molding surface; 114. a fourth upper molding surface; 115. a fifth upper molding surface; 116. a clamping part; 200. a lower die mechanism; 210. a first female die; 220. a second female die; 221. a positioning part; 222. a cutter head portion; 230. a material returning plate; 240. a lower die body; 241. a mold cavity; 2411. a first working surface; 2412. a second working surface; 2413. a third working surface; 2414. a fourth working surface; 2415. a fifth working surface; 2416. a sixth working surface; 2417. a seventh working surface; 242. a first spring groove; 243. a second spring groove; 250. an elastic member; 251. a first spring; 252. a second spring; 300. a workpiece; 310. a first bending section; 320. a second bending section; 330. a third bending section; 340. a fourth bending section; 350. a fifth bending section.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a schematic view of a local bending part (hereinafter referred to as a workpiece 300) to be processed by the forming mold of the present invention, the thickness of which is 0.5mm, and the local bending part comprises five sections, including a first bending section 310, a second bending section 320, a third bending section 330, a fourth bending section 340, and a fifth bending section 350, which are connected in sequence. Wherein the first bending section 310 and the fifth bending section 350 are flush on the same plane; the included angle between the second bending section 320 and the first bending section 310 is 30 degrees, the second bending section 320 and the first bending section 310 are connected through an arc surface, and the inner diameter of the arc surface is 1.5 mm; the third bending section 330 is parallel to the first bending section 310, the included angle between the third bending section 330 and the second bending section 320 is 30 degrees, the third bending section 330 is connected with the second bending section 320 through an arc surface, and the inner diameter of the arc surface is 1.5 mm; a sharp angle of 150 ° is formed between the fourth bending section 340 and the third bending section 330. In order to form the workpiece 300 in one step, the applicant designs the forming die of the present embodiment, which has the advantage of facilitating stripping.

Example 1

The forming die applied to the partially bent part of the rail transit vehicle body comprises an upper die mechanism 100 and a lower die mechanism 200, wherein the upper die mechanism 100 comprises an upper male die 110 for punch-forming the upper surface of a workpiece 300, the lower die mechanism 200 comprises a first female die 210, a second female die 220, a stripper plate 230 and a lower die body 240, a die cavity 241 is formed in the lower die body 240, the first female die 210 and the stripper plate 230 are telescopically connected into the die cavity 241, the second female die 220 slides along the inner wall of the die cavity 241 through an inclined surface, meanwhile, a positioning part 221 is arranged on the side surface of the second female die 220, and the positioning part 221 is clamped between the first female die 210 and the stripper plate 230; when the dies are closed, the upper punch 110, the first die 210 and the second die 220 cooperate to form a bending space, that is, the lower end surface of the upper punch 110 fits the upper surface of the workpiece 300, and the workpiece 300 is pressed into the bending space formed above, so as to realize one-step forming.

As shown in fig. 2, the lower end surface of the upper punch 110 is formed by sequentially connecting a first upper forming surface 111, a second upper forming surface 112, a third upper forming surface 113, a fourth upper forming surface 114, and a fifth upper forming surface 115, and has the same structural shape as the first bending section 310, the second bending section 320, the third bending section 330, the fourth bending section 340, and the fifth bending section 350 of the workpiece 300; the upper end of the upper male die 110 is provided with a clamping part 116 which is fixedly connected with a bending machine in a matching manner, the bending machine drives the upper male die 110 to perform upward stripping or downward stamping, and the structure of the upper male die 110 is shown in fig. 3.

As shown in fig. 6, the lower mold body 240 has a mold cavity 241 formed therein, and the mold cavity 241 is an upwardly open cavity formed by sequentially connecting a first working surface 2411, a second working surface 2412, a third working surface 2413, a fourth working surface 2414, a fifth working surface 2415, a sixth working surface 2416, and a seventh working surface 2417. Wherein the first working surface 2411 and the second working surface 2412 form a sharp angle of 120 degrees; the second working surface 2412, the third working surface 2413, the fourth working surface 2414, the fifth working surface 2415, the sixth working surface 2416 and the seventh working surface 2417 are sequentially connected at a right angle, meanwhile, the fourth working surface 2414 is provided with a second spring groove 243 downwards, and the sixth working surface 2416 is provided with a first spring groove 242 downwards.

The structure of the first concave die 210 is as shown in fig. 4, the bottom of the first concave die 210 is connected to a first spring 251 installed in the first spring groove 242, when the die is closed, the bottom surface and the right side surface of the first concave die 210 are respectively attached to the sixth working surface 2416 and the seventh working surface 2417, and the first concave die 210 slides along the seventh working surface 2417 due to the expansion and contraction of the first spring 251.

The second female die 220 has a structure as shown in fig. 5, and the left side surface thereof is an inclined surface which is matched with the first working surface 2411 to slide; the lower end of the right side surface of the second concave die 220 is provided with a positioning part 221, along with the downward sliding of the second concave die 220, the upper surface of the positioning part 221 slides rightwards along the bottom surface of the first concave die 210, and simultaneously the lower surface of the positioning part 221 slides rightwards along the upper surface of the stripper plate 230; the upper end of the right side surface of the second concave die 220 is provided with a cutter head part 222, along with the downward sliding of the second concave die 220, the cutter head part 222 extrudes the part contacting the workpiece 300 to be attached between the first upper forming surface 111 and the second upper forming surface 112, and meanwhile, the cutter head part 222 is also attached to the workpiece 300; it is worth noting that an avoidance space is arranged at a bending space corresponding to the arc surface between the second bending section 320 and the third bending section 330, so as to prevent the arc surface from being damaged.

The stripper plate 230 has a square structure, the bottom surface of the stripper plate is connected to the second spring 252 installed in the second spring groove 243, when the second spring 252 is compressed, the stripper plate 230 slides downward along the third working surface 2413 and the fifth working surface 2415, and when the second spring 252 returns, the stripper plate 230 plays a role of stripping.

The forming method of the forming die applied to the local bent part of the rail transit vehicle body comprises the following steps:

(1) assembling a lower die mechanism, wherein the upper surfaces of the first concave die 210 and the second concave die 220 are higher than the upper surface of the lower die body 240, the upper surfaces of the first concave die 210 and the second concave die 220 are flush, and the positioning part 221 of the second concave die 220 is clamped between the lower surface of the first concave die 210 and the upper surface of the stripper plate 230, as shown in fig. 2, placing the plate-shaped workpiece 300 on the upper surfaces of the first concave die 210 and the second concave die 220 to wait for being punched;

(2) the upper punch 110 performs downward stamping, a cutter head formed by a second upper forming surface 112, a third upper forming surface 113 and a fourth upper forming surface 114 at the lower end of the upper punch presses the workpiece 300 into a gap between the first female die 210 and the second female die 220, meanwhile, the first spring 251 and the second spring 252 are compressed by the stamping force, so that the first female die 210 and the stripper plate 230 move downward, the second female die 220 slides downward, the positioning part 221 slides between the first female die 210 and the stripper plate 230, the cutter head part 222 contacts the workpiece 300, and the workpiece is pressed into a bending space formed between the first upper forming surface 111 and the second upper forming surface 112, as shown in fig. 7;

(3) as shown in fig. 8, the upper punch 110 moves upwards to strip, and the first spring 251 and the second spring 252 return, so that the first concave die 210, the second concave die 220, and the stripper plate 230 all move upwards and are separated from each other, which facilitates the stripping, and thus the partially bent part shown in fig. 1 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 (8)

1. The utility model provides a be applied to forming die of local piece of buckling of track traffic automobile body, includes upper die mechanism (100) and lower die mechanism (200), its characterized in that: the upper die mechanism (100) comprises an upper male die (110); the lower die mechanism (200) comprises a first female die (210), a second female die (220), a stripper plate (230) and a lower die body (240), a die cavity (241) is formed in the lower die body (240), the first female die (210) and the stripper plate (230) are telescopically connected into the die cavity (241), the second female die (220) slides along the inner wall of the die cavity (241) through an inclined surface, meanwhile, a positioning part (221) is arranged on the side surface of the second female die (220), and the positioning part (221) is clamped between the first female die (210) and the stripper plate (230); when the die is closed, the upper male die (110), the first female die (210) and the second female die (220) are matched to form a bending space.

2. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 1, wherein: the lower end face of the upper male die (110) comprises a first upper forming face (111), a second upper forming face (112), a third upper forming face (113), a fourth upper forming face (114) and a fifth upper forming face (115) which are sequentially connected, wherein the first upper forming face (111), the third upper forming face (113) and the fifth upper forming face (115) are parallel to each other, an included angle formed between the first upper forming face (111) and the second upper forming face (112) is an acute angle, and an included angle formed between the fourth upper forming face (114) and the third upper forming face (113) is an obtuse angle.

3. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 2, wherein: the first upper forming surface (111) and the second upper forming surface (112) are connected through arc surfaces, and the second upper forming surface (112) and the third upper forming surface (113) are connected through arc surfaces.

4. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 3, wherein: and the upper end of the upper male die (110) is provided with a clamping part (116) which is fixedly connected with a bending machine.

5. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 4, wherein: and a cutter head part (222) is arranged at the upper part of the side surface of the second female die (220), and the cutter head part (222) is inserted between the first upper forming surface (111) and the second upper forming surface (112) in a matching way during die assembly.

6. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 5, wherein: the first concave die (210) and the stripper plate (230) are respectively connected with the die cavity (241) through an elastic component (250).

7. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 6, wherein: the elastic component (250) is a spring.

8. The forming die applied to the local bent part of the rail transit vehicle body as claimed in claim 7, wherein: the second female die (220) is slidably connected with the track through the sliding block, so that the second female die (220) slides along the inner wall of the die cavity (241).

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