CN216420773U

CN216420773U - Deep drawing forming device for hydraulic male die of stepped part

Info

Publication number: CN216420773U
Application number: CN202123057165.7U
Authority: CN
Inventors: 杨连发; 董晨晨; 高志巍; 刘旭
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-05-03
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a be used for cascaded piece hydraulic pressure terrace die deep-drawing forming device, including cope match-plate pattern, die and topping up base, be provided with on the topping up base hydraulic pressure room and with the feed liquor hole of hydraulic pressure room intercommunication, the die comprises the direction blank pressing section of thick bamboo, portable sub-die, ejector pin and the packing ring of coaxial setting, by outer to interior be direction blank pressing section of thick bamboo, portable sub-die and ejector pin in proper order, wherein the bottom detachable of direction blank pressing section of thick bamboo installs on the topping up base, the top of portable sub-die and ejector pin is installed respectively on the cope match-plate pattern, the packing ring set up between the top of direction blank pressing section of thick bamboo and cope match-plate pattern. The utility model discloses utilize the bottom face cooperation direction blank pressing section of thick bamboo of portable sub-die and ejector pin to form and wait to take shape the die cavity that the part shape is unanimous, panel arranges in between die and the topping up base, and the concave yield degree of depth of forming piece is adjusted through the high realization that changes the packing ring to take shape and obtain the part that the shape is the same but the cavity degree of depth is different or take shape and obtain the stairstepping part.

Description

Deep drawing forming device for hydraulic male die of stepped part

Technical Field

The utility model relates to a panel hydroforming device, concretely relates to be used for notch cuttype spare hydraulic pressure terrace die deep-drawing forming device.

Background

The plate hydraulic forming technology is a processing technology which uses a liquid medium to replace a male die or a female die and enables a plate to be formed by the pressure of the liquid medium. The pre-expansion hydromechanical drawing is a forming method that a plate is expanded under the action of initial pressure of fluid medium in a liquid filling chamber, a preset shape is obtained through the restraint of a die, and then hydromechanical drawing forming is carried out. Compared with the drawing forming technology of a rigid mold, the technology of pre-expansion hydraulic drawing forming has the advantages of reducing the cost and shortening the manufacturing time of the mold; the strain hardening amount of the plate is improved, and the part can obtain enough rigidity, strength, bending resistance and dent resistance after being formed; the wall thickness of the formed part is distributed evenly, and the quality and the precision are high. Based on the advantages of the pre-expansion hydromechanical drawing forming technology, the hydroforming technology is more beneficial to forming parts with thin walls, deep cavities and complex curved surfaces, and correspondingly, a hydroforming die device is also developed correspondingly, such as:

the invention patent with publication number CN1559719A discloses a method for hydroforming a metal plate and a die device thereof, wherein the device adopts liquid to replace a male die, and the plate is formed into a required shape through the constraint of a rigid body female die. Although the device is simple in structure, the shape of a cavity of a female die on the female die is fixed and unchanged, the shape of a formed part is consistent with that of the female die, the plate is restrained to be formed by descending the female die after liquid filling, the plate can be formed by drawing only by providing larger hydraulic pressure, and the precision of the formed part is lower when the material with poor plasticity forms a complex part.

The invention patent with publication number CN107486488A provides a convenient and clean sheet metal hydroforming method and a die device thereof, the invention adopts a liquid medium to replace a convex die, and a concave die cavity with the same shape as a part to be formed is arranged on the concave die. Although the device is convenient to clean, the shape of a cavity of the female die on the female die is also fixed, and in addition, the device not only applies a blank holder force but also applies a die locking force F to the plate and the female die before a test.

Therefore, the shape of a cavity of a female die on the female die in the conventional hydraulic forming die device is fixed, and when parts with the same shape but different depths of the female cavities are formed, the die needs to be replaced, so that the cost is high; and the stepped part cannot be formed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a be used for cascaded piece hydraulic pressure terrace die deep-drawing forming device, the device is with low costs, can take shape to obtain the same but part or the shaping of cavity degree of depth difference of shape and obtain the stairstepping part.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a deep drawing forming device for a hydraulic male die of a stepped part comprises an upper die plate, a female die and a liquid filling base, wherein a hydraulic chamber and a liquid inlet hole communicated with the hydraulic chamber are arranged on the liquid filling base, the female die is composed of a guide blank pressing cylinder, a movable sub-female die, a mandril and a gasket, the guide blank pressing cylinder, the movable sub-female die, the mandril and the gasket are coaxially arranged, the guide blank pressing cylinder, the movable sub-female die and the mandril are sequentially arranged from outside to inside, the bottom end of the guide blank pressing cylinder is detachably arranged on the liquid filling base, the top ends of the movable sub-female die and the mandril are respectively detachably arranged on the upper die plate, and the gasket is arranged between the top end of the guide blank pressing cylinder and the upper die plate; the bottom end surfaces of the movable sub-female die and the ejector rod are matched with the guide blank holder to form a female die cavity consistent with the shape of the part to be formed, and the plate is arranged between the female die and the liquid filling base.

In the above technical solution, in order to prevent the liquid in the hydraulic pressure chamber from leaking, it is preferable to provide a sealing ring between the guiding blank holder cylinder and the liquid filling base.

Among the above-mentioned technical scheme, be clearance fit between the inside wall of direction blank holder and the outer wall of portable sub-die, between the outer wall of portable sub-die and the inner wall of packing ring and between the outer wall of ejector pin and the inner wall of portable sub-die.

The utility model discloses the part that the shapeable obtains the same shape but the cavity degree of depth is different or the shaping obtains the stairstepping part. When parts with the same shape but different concave depths are required to be formed, only gaskets with different heights need to be replaced; and when the stepped part needs to be formed, the gasket comprises at least two specifications with different heights, wherein the gasket with one height corresponds to a pre-expansion state in the forming process, and the gasket with the other height corresponds to a forming state in the forming process.

Compared with the prior art, the utility model adopts the guiding blank holder cylinder, the movable sub-concave die, the ejector rod and the gasket to form the concave die, utilizes the bottom end surfaces of the movable sub-concave die and the ejector rod to match the guiding blank holder cylinder to form a concave die cavity with the shape consistent with that of the part to be formed, can realize the adjustment of the concave depth of the formed part by changing the height of the gasket so as to form the part with the same shape but different concave depth or form the stepped part; and the utility model relates to an ingenious, easy dismounting, it is effectual to take shape, with low costs.

Drawings

Fig. 1 is a front view of an embodiment of the device of the present invention.

Fig. 2 is a schematic overall structure diagram of the embodiment shown in fig. 1.

Fig. 3 is a schematic diagram of the forming process principle of the device of the present invention, wherein (a) is the initial state, (b) is the pre-expansion state, and (c) is the forming state.

The reference numbers in the figures are:

1 a liquid-filled base; 2, guiding the blank holder; 3, the sub-concave die can be moved; 4, a top rod; 5, a gasket; 6, upper template; 7, plates; 8, liquid; 9, sealing rings; 10 liquid inlet holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the hydraulic male die deep drawing forming device for the stepped part comprises an upper die plate 6, a female die and a liquid filling base 1, wherein a hydraulic chamber and a liquid inlet hole 10 communicated with the hydraulic chamber are arranged on the liquid filling base 1, the female die is composed of a guide blank holder cylinder 2, a movable sub-female die 3, a push rod 4 and a gasket 5, the guide blank holder cylinder 2, the movable sub-female die 3, the push rod 4 and the gasket 5 are coaxially arranged and sequentially provided with the guide blank holder cylinder 2, the movable sub-female die 3 and the push rod 4 from outside to inside, wherein the bottom end of the guide blank holder cylinder 2 is detachably mounted on the liquid filling base 1, the top ends of the movable sub-female die 3 and the push rod 4 are detachably mounted on the upper die plate 6 respectively, and the gasket 5 is arranged between the top end of the guide blank holder cylinder 2 and the upper die plate 6; the bottom end surfaces of the movable sub-female die 3 and the ejector rod 4 are matched with the guide blank holder 2 to form a female die cavity consistent with the shape of a part to be formed, and the plate 7 is arranged between the female die and the liquid filling base 1.

The utility model discloses a direction blank pressing section of thick bamboo 2, portable sub-die 3, ejector pin 4 and packing ring 5 constitute the die, but utilize the bottom face cooperation direction blank pressing section of thick bamboo 2 inner walls of movable sub-die 3 and ejector pin 4 to form and wait to take shape the unanimous die cavity of part shape, can realize adjusting the position of movable sub-die 3 and then realize the purpose of adjusting forming piece concave yield degree of depth through the thickness that changes packing ring 5 to take shape and obtain the same but the different part of cavity degree of depth of shape or take shape and obtain the stairstepping part. Transition fillets are formed in the bottom of the inner wall of the guide blank holder 2, the inner side wall of the guide blank holder 2 is in clearance fit with the outer wall of the movable sub-female die 3, and rigid blank holding is performed on the plate 7 through the guide blank holder 2. And the outer wall of the movable sub-female die 3 and the inner wall of the gasket 5 are in clearance fit, and the outer wall of the ejector rod 4 and the inner wall of the movable sub-female die 3 are in clearance fit.

The connection modes between the guiding blank holder cylinder 2 and the liquid filling base 1 and between the movable sub-concave die 3 and the ejector rod 4 and the upper die plate 6 can adopt the connection modes of screw and thread matching. In the embodiment shown in fig. 1, threaded holes are formed in the liquid filling base 1, the ejector rod 4 and the movable sub-female die 3, plain holes are formed in the guiding blank holder 2 and the upper die plate 6, screws penetrate through the plain holes and enter the threaded holes to realize connection between the guiding blank holder 2 and the liquid filling base 1, and the movable sub-female die 3 is connected with the upper die plate 6 and the ejector rod 4 is connected with the upper die plate 6. On the one hand, the movable sub-female die 3, the upper die plate 6 and the ejector rod 4 are connected together through screws, so that the disassembly is convenient, the pre-bulging and the forming action are guaranteed, and a good forming effect is achieved. On the other hand, the movable sub-female die 3, the upper die plate 6 and the ejector rod 4 are connected into a whole through screws, and when parts with the same shape and different concave depths are obtained through forming, the gaskets 5 with different heights only need to be replaced; and when the stepped part needs to be formed, the gasket 5 comprises at least two specifications with different heights, wherein the gasket 5 with one height corresponds to a pre-expansion state in the forming process and is used for controlling the plate 7 to pre-expand, the gasket 5 with the other height corresponds to a forming state in the forming process and is used for controlling the plate 7 to form, and the purpose of forming the stepped part is achieved through clearance fit with two or more gaskets 5 with different heights. And, through the clearance fit of ejector pin 4 and movable sub-die 3, can push out the shaping part after the deep drawing is finished.

In order to prevent the liquid 8 in the hydraulic chamber from leaking, a sealing ring 9 may be disposed between the guiding blank holder 2 and the liquid filling base 1, and specifically, an annular groove may be formed on the top end surface of the liquid filling base 1, and the sealing ring 9 may be disposed in the annular groove.

Fig. 3 is a schematic diagram of different states of the stepped part obtained by drawing, wherein fig. 3(a) is an initial state, as shown in fig. 3(a), a plate 7 is firstly placed on the upper surface of the liquid filling base 1, then the liquid filling base 1 and the guiding blank holder cylinder 2 are connected into a whole through a screw, the blank holder force of the guiding blank holder cylinder 2 is controlled by adjusting the torque force of the screw through a torque wrench, and the liquid filling is preformed after blank holding. Before the test, the hydraulic chamber is filled with hydraulic oil, so that the effect of removing air in the hydraulic chamber is achieved; after the air is exhausted, the gasket 5 corresponding to the height of the pre-expansion state is assembled with the movable sub-female die 3 and the ejector rod 4, and then is assembled with the guide blank holder 2. The pressure device is then adjusted to fix the test apparatus, liquid is continuously supplied to the hydraulic chamber, the sheet 7 is drawn into a transitional shape, and the pre-expanded state is shown in fig. 3 (b). After completion, the gasket 5 corresponding to the height of the formed state was replaced, the forming hydraulic pressure was increased to continue drawing, and finally the pressure was released to complete the hydraulic drawing test, and the formed state was as shown in fig. 3 (c). Lifting the testing machine, disassembling the device, and taking out the plate 7 to obtain the required step-shaped formed piece.

Claims

1. A deep drawing forming device for a hydraulic male die of a stepped part comprises an upper template (6), a female die and a liquid filling base (1), the liquid filling base (1) is provided with a hydraulic chamber and a liquid inlet hole (10) communicated with the hydraulic chamber, it is characterized in that the female die consists of a guiding blank holder cylinder (2), a movable sub-female die (3), a mandril (4) and a gasket (5), the guide blank holder cylinder (2), the movable sub-concave die (3), the ejector rod (4) and the gasket (5) are coaxially arranged, the guide blank holder cylinder (2), the movable sub-concave die (3) and the ejector rod (4) are arranged from outside to inside in sequence, wherein the bottom end of the guiding edge pressing cylinder (2) is detachably arranged on the liquid filling base (1), the movable sub-concave die (3) and the top end of the ejector rod (4) are respectively and detachably arranged on the upper template (6), the gasket (5) is arranged between the top end of the guide blank holder cylinder (2) and the upper template (6); the bottom end surfaces of the movable sub-female die (3) and the ejector rod (4) are matched with the guide blank holder cylinder (2) to form a female die cavity with the shape consistent with that of a part to be formed, and the plate (7) is arranged between the female die and the liquid filling base (1).

2. The hydraulic male die deep-drawing forming device for the stepped part according to claim 1, wherein a sealing ring (9) is arranged between the guiding blank holder cylinder (2) and the liquid filling base (1).

3. Device according to claim 1 or 2, characterised in that, when used for a step, the gasket (5) comprises at least two different height specifications, wherein the gasket (5) of one height corresponds to a pre-expanded state during forming and the gasket (5) of the other height corresponds to a formed state during forming.