CN212884467U - Sequential pulsating deep-drawing forming die in multi-concave-convex curved surface die for metal sheet - Google Patents

Abstract

The invention discloses a metal sheet multi-concave-convex curved surface die internal sequential pulsating drawing forming die, which comprises a drawing convex-concave die and a drawing concave die, and is characterized in that: the deep drawing female die consists of a lower die cushion block and a lower die core which are positioned at the lower part, a die cavity which is arranged according to the shape of a product is arranged in the middle of the lower die core, an inner convex surface forming male die is arranged on the lower die cushion block, the deep drawing male die consists of an upper die core which is arranged in the middle and a pressure plate push rod which is arranged outside the upper die core, a pushing piece moving cavity is arranged in the upper die core, a pushing piece block which is arranged according to the shape of the product is arranged in the pushing piece moving cavity, the pushing piece block can move in the pushing piece moving cavity, and the depth of the cavity of the pushing piece moving cavity is larger than the stroke of the pushing.

Description

Sequential pulsating deep-drawing forming die in multi-concave-convex curved surface die for metal sheet

Technical Field

The utility model relates to a sheet metal shaping technical field especially relates to a fashioned mould of order pulsation deep-drawing in many unsmooth curved surface moulds of sheet metal.

Background

The metal sheet forming is a processing process of processing the metal sheet into thin-wall parts with different shapes and sizes and good performances (organization structure, mechanical property and the like) by a certain tool and a processing method. Compared with other methods of mechanical processing and plastic processing, the equipment and the process used for punching and forming the thin plate are relatively simple, and the method has the advantages of high productivity, high material utilization rate, high dimensional precision, good interchangeability, simple operation, easy realization of mechanization and automation and the like in the aspects of technology and economy. Therefore, the thin plate punch forming is an important branch of pressure processing, and has extremely wide application in the fields of aerospace, automobiles, electronic instruments, hardware and household appliances and the like.

The commonly used sheet punch forming process mainly comprises bending, deep drawing, flanging, necking, bulging and the like. With the continuous development of scientific technology, the requirements of equipment and products in some high-technology fields on materials and structural organizations are higher and higher. For example, equipment in the aerospace field is mostly high-performance overall complex multi-concave-convex curved surface components. The components have the outstanding characteristics of difficult deformation of materials, complex shape (large outline size, multiple local small features, abrupt change of curvature and ultrathin wall thickness), high performance requirement, multiple working procedures required by the traditional stamping and deep drawing forming method, low efficiency and difficult guarantee of precision.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a fashioned mould of order pulsation deep-drawing in many unsmooth curved surface moulds of sheet metal for solve the not enough of prior art.

In order to solve the above problems, the technical solution of the present invention is:

the utility model provides a fashioned mould of order pulsation deep-drawing in many unsmooth curved surface moulds of sheet metal, including deep-drawing punch-die and deep-drawing die, the deep-drawing die by the lower mould cushion and the lower core group that are located the lower part constitute, lower core middle part is provided with the die cavity that sets up according to the product shape, be provided with interior convex surface shaping terrace die on the lower mould cushion, deep-drawing punch-die comprises the last mold core that sets up at the middle part and the pressure flitch push rod that sets up in the last mold core outside, and the inside push piece motion chamber that is provided with of last mold core, be provided with the ejector pad that establishes according to the product shape in the ejector pad motion chamber, the ejector pad can be in the motion intracavity motion of ejector pad, the degree of depth of the cavity in the ejector.

The material pressing plate push rod and the pushing piece block are respectively controlled by independent hydraulic oil cylinders.

The utility model has the advantages that: by adopting the pulse type sequential drawing method, the accurate forming of the complex sheet part can be realized by effectively controlling the related parts of the die to do intermittent motion and performing the sequential drawing forming of the metal sheet complex curved surface part, the die structure is simplified (the male die or the female die is saved), the forming efficiency is improved, and the processing cost is saved.

Drawings

FIG. 1 is a schematic view of the apparatus of the present invention prior to molding;

FIG. 2 is a schematic structural view of the apparatus of the present invention during the first molding;

FIG. 3 is a schematic structural view of the apparatus of the present invention during the second molding;

FIG. 4 is a schematic structural view of the apparatus of the present invention during the second molding;

FIG. 5 is a schematic view of the product formed by the present invention;

in the figure: 1-drawing punch-die, 2-drawing die, 11-upper die core, 12-pressure plate push rod, 13-pushing piece block, 14-pushing piece moving cavity, 21-lower die cushion block, 22-lower die core, 23-die cavity, 24-inner convex surface forming punch, H-product height dimension, H1-stretching height dimension, H2-reverse stretching height, 3-sheet material, 31-product convex part and 32-product concave part.

Detailed Description

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

Referring to the attached drawings 1-5, the utility model discloses a deep-drawing punch-die 1 and deep-drawing die 2, deep-drawing die 2 constitute by lower mould cushion 21 and lower mould core 22 that are located the lower part, lower mould core 22 middle part is provided with die cavity 23 that sets up according to the product shape, be provided with protruding face shaping terrace die 24 in the lower mould cushion 21, deep-drawing punch-die 1 comprises last mold core 11 that sets up at the middle part and the pressure flitch push rod 12 that sets up in the last mold core 11 outside, and it moves the chamber 14 to go up the inside ejector pad that is provided with of mold core 11, it sets up according to the ejector pad 13 that the product shape and establish to set up in the ejector pad motion chamber 14, ejector pad 13 can move at ejector pad motion chamber 14, the degree of depth of the cavity in ejector pad motion chamber 14 is greater than the stroke of ejector.

The method comprises the following steps:

mounting a drawing punch-die 1 and a drawing die 2 on a forming machine;

placing the plate 3 on the drawing female die 2;

starting a machine to enable the drawing punch-die 1 to move downwards, enabling the pressure plate push rod 12 to press the plate 3 above the drawing die 2, and then stopping the pressure plate push rod 12;

the upper die core 11 and the pushing block 13 continue to move downwards, the downward stretching size is the stretching height size H1, and the first forming of the plate 3 is completed;

the upper die core 11 and the pushing piece block 13 reversely move upwards to reach the height dimension H of the product, and then the upper die core 11 stops moving;

the inner convex surface forming convex die 24 starts to move upwards until the inner convex surface forming convex die pushes the plate 3, the pushing piece block 13 moves upwards under the upward acting force of the inner convex surface forming convex die 24, the pushing piece block 13 and the inner convex surface forming convex die 24 move upwards to the reverse stretching height H2, and the second forming is completed.

And the drawing punch-die 1 integrally moves upwards to separate the drawing punch-die 1 from the drawing die 2, and the drawing punch-die 1 is taken out finally after being restored to the initial state.

The material pressing plate push rod 12 and the pushing piece block 13 are respectively controlled by independent hydraulic oil cylinders.

The stretched height dimension H1 is greater than the product height dimension H.

The depth of the mold cavity 23 is greater than the draw height dimension H1.

In practical application, the final product formed by the plate 3 has a product convex portion 31 and a product concave portion 32, the first forming is to form the product convex portion 31, and the second forming is to form the product concave portion 32 in a reverse direction.

When the first forming is carried out to draw and form the outer convex part 31 of the product, on the premise of ensuring that the deformation degree of the material is within the forming limit range, the actual stretching height is larger than the height of the product, so that enough material is mainly reserved for the inner concave part 32 of the subsequent formed product, when the inner concave part 32 of the product is formed by the second back drawing, the flowing of the material in the drawing process is mainly obtained by reducing the height of the first forming redundant part, and the height of the first forming redundant part is determined by the number of the inner concave part 32 of the product.

Through this utility model's post forming, can effectually have convex-concave complex structure to the product to the fashioned wall thickness is more even, and surface finish is good, and just can accomplish multiple complex structure's shaping through one set of module, has saved terrace die or die.

The sequential pulsating drawing forming is to realize the forming of the plate by adjusting and controlling the position of a working part and sequential drawing, can solve the problem that complex curved surface parts needing multi-process forming are sequentially subjected to pulsating drawing forming in a set of die, the blank pressing of the sequential pulsating drawing forming is adjustable and controllable, a pressure plate push rod 12 and a piece pushing block 13 are generally controlled by an independent hydraulic oil cylinder to be determined according to the actual thickness, material and complexity of a product, the action and stroke of a drawing convex-concave die 1 can be adjusted and controlled, the downward drawing of an upper die core 11 can be realized, the inward reverse drawing of the piece pushing block 13 can be realized, the sequential pulsating drawing is realized, and the forming can be realized according to different heights of the product through the adjustment and the control. The material is provided by the side surface of the formed shell when the product concave part 32 is formed, the material is easy to flow and form, and the material gradually contacts with the die for forming through the receding of the concave-convex die when the product convex part 31 and the product concave part 32 are formed, so that the flow resistance in the material forming process is reduced, the forming is facilitated, and the precision of the processed part is also enhanced.

Because the pressure plate push rod 12 and the pushing block 13 are respectively controlled by independent hydraulic oil cylinders and are independent from the upper die core 11, the product is generally on the upper die core 11 after the final drawing punch-die 1 is separated from the drawing die 2, and the product can be ejected from the upper die core 11 by the pushing block 13 through the relative movement of the pushing block 13 and the upper die core 11.

By adopting the sequential pulsating deep-drawing forming method, the related parts of the die are effectively controlled to do intermittent motion, and the sequential pulsating deep-drawing forming of the metal sheet complex curved surface parts is performed, so that the precise forming of the complex sheet parts can be realized, the internal stress of the product is reduced, the die structure is simplified (a male die or a female die is saved), the forming efficiency is improved, and the processing cost is saved.

The above-mentioned specific implementation is the preferred embodiment of the present invention, can not be right the utility model discloses the limit, any other does not deviate from the technical scheme of the utility model and the change or other equivalent replacement modes of doing all contain within the scope of protection of the utility model.

Claims (2)

1. The utility model provides a fashioned mould of order pulsation deep-drawing in many unsmooth curved surface moulds of sheet metal, includes deep-drawing punch-die and deep-drawing die, its characterized in that: the deep drawing female die consists of a lower die cushion block and a lower die core which are positioned at the lower part, a die cavity which is arranged according to the shape of a product is arranged in the middle of the lower die core, an inner convex surface forming male die is arranged on the lower die cushion block, the deep drawing male die consists of an upper die core which is arranged in the middle and a pressure plate push rod which is arranged outside the upper die core, a pushing piece moving cavity is arranged in the upper die core, a pushing piece block which is arranged according to the shape of the product is arranged in the pushing piece moving cavity, the pushing piece block can move in the pushing piece moving cavity, and the depth of the cavity of the pushing piece moving cavity is larger than the stroke of the pushing.

2. The die for sequentially pulsating drawing and forming in a multi-concavo-convex curved surface die of a metal sheet according to claim 1, wherein: the material pressing plate push rod and the pushing piece block are respectively controlled by independent hydraulic oil cylinders.

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