CN114011943A - Die for bending and bulging part with negative angle - Google Patents
Die for bending and bulging part with negative angle Download PDFInfo
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- CN114011943A CN114011943A CN202011196912.2A CN202011196912A CN114011943A CN 114011943 A CN114011943 A CN 114011943A CN 202011196912 A CN202011196912 A CN 202011196912A CN 114011943 A CN114011943 A CN 114011943A
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- die
- female die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/031—Mould construction
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- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention belongs to the technical field of forging and pressing, and discloses a die for bending and bulging parts with negative angles, which comprises an auxiliary part taking mechanism, wherein a female die comprises a movable half female die and a fixed half female die which are formed by splicing, the fixed half female die is fixed on a female die holder, the movable half female die is detachably and fixedly connected with the female die holder through the limiting of a limiting assembly, the auxiliary part taking mechanism is arranged on the female die holder at one side of the movable half female die, and the auxiliary part taking mechanism can drive the movable half female die to move relatively close to or far away from the fixed half female die on the female die holder under the condition that the limiting assembly does not limit the movable half female die. The invention provides a die for bending and bulging parts with negative angles, which divides a female die into two halves, greatly reduces the processing cost of the molded surface of the female die, and is provided with a hand wheel and a lead screw, so that the parts with negative angles can be taken out conveniently.
Description
Technical Field
The invention belongs to the technical field of forging and pressing, and particularly relates to a die for bending and bulging parts with negative angles.
Background
As the strategic strut industry in China, the aerospace industry has always represented the most advanced productivity. The lightening and the refinement of the aircraft are the direction of the development of aerospace in recent years. As the sheet metal part occupying about 30 percent of the total number of airplane parts, the light weight and the precision of the sheet metal part play a crucial role in the light weight and the precision of the airplane. In order to meet the requirements of light weight and precision of sheet metal parts, some advanced forming technologies are developed. Hydroforming is one of the representative advanced special forming techniques. Hydroforming is a special shaping technique that utilizes high pressure liquid as the shaping medium. Compared with the traditional shaping forming technology, the technology can obviously improve the precision and the surface quality of the part and simultaneously reduce the quality of the part, thereby meeting the requirements of light weight and precision of the part.
Press-bending bulging is a typical forming process of hydroforming and offers unique advantages in forming open parts. The open part can be approximately defined as a three-sided closed and three-sided open part, and typical parts include a U-shaped part and an omega-shaped part. The open part has wide application in aircraft skin and air inlet duct etc. and some of them have certain negative angle, and the existence of negative angle makes the part can't take out from the mould after the completion of making, and the manufacturing cost and the cycle of mould profile are all great increase simultaneously.
Therefore, based on the technical problems, it is important to provide a die for bending and bulging negative-angle parts, which can realize the removal of the parts and greatly reduce the manufacturing cost and period of the die.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a die for bending and bulging a part with a negative angle, which can realize part taking out and greatly reduce the manufacturing cost and period of the die.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
the utility model provides a mould for bending bulging area negative angle part, is including the punch holder and the die holder that are upper and lower distribution, install the terrace die on the punch holder, install the die on the die holder, still including supplementary a mechanism of getting, the die includes the removal half die that the concatenation constitutes and fixed half die, fixed half die is fixed in on the die holder, remove half die and can dismantle fixed connection through spacing and the die holder of spacing subassembly, supplementary a mechanism of getting is installed on the die holder of removing half die one side, supplementary a mechanism of getting can do the relative motion that is close to or keeps away from on the die holder to half die of fixed half die of relative motion on the die holder at spacing subassembly not to the drive removal half die under the spacing condition of half die of removal.
Preferably, the limiting assembly comprises a wedge block group and a pressing plate group, the wedge block group and the pressing plate group are detachably fixed on the die holder, the wedge block group limits the displacement in the X direction and the Y direction of the movable half die, and the pressing plate group limits the displacement in the Z direction of the movable half die.
In any of the above schemes, preferably, the wedge set includes an outer wedge and an inner wedge, the outer wedge extrudes the inner wedge to abut against the side wall of the movable half-female die so as to limit the X and Y directions of the movable half-female die, and the outer wedge is detachably and fixedly connected with the female die holder.
In any of the above schemes, preferably, a mounting groove is arranged at the top of the die holder, a side wall of the mounting groove is communicated with the outside, and the die, the wedge block group and the pressing plate group are all mounted in the mounting groove.
In any of the above schemes, preferably, the pressing plate set includes at least two movable female pressing plates, a blank holder is fixed on the outer wall of one side of the movable half female die, the movable female pressing plates press the blank holder to be fixed on the female die holder, and the blank holder is located above the wedge block set.
It is preferred in any one of the above-mentioned schemes, supplementary a mechanism of getting includes lead screw, lead screw briquetting, the one end of lead screw runs through the die holder and extends to the mounting groove in, lead screw and die holder threaded connection, the other end and the driving piece of lead screw are connected, lead screw end fixing in the mounting groove has T type head, be fixed with two lead screw briquetting that are upper and lower distribution on the lateral wall that removes half die and lead screw and correspond, the lead screw briquetting is L type structure, T type head card is between two lead screw briquetting to make the lead screw can drive and remove half die and remove.
In any of the above schemes, preferably, the driving member is a hand wheel, and the hand wheel is fixedly connected with a lead screw outside the mounting groove.
In any of the above schemes, preferably, the movable half concave die and the fixed half concave die have the same structure and are symmetrically distributed along the central line of the concave die.
In any of the above schemes, preferably, a sealing groove is processed on the male die, and a sealing rubber strip is arranged in the sealing groove.
In any of the above schemes, preferably, guide plates are respectively fixed on the outer side walls of the movable half-female die and the fixed half-female die, and the male die holder is guided by the guide plates with the female die in the downward moving process.
In conclusion, the invention has the following advantages and positive effects:
1. according to the invention, the female die adopts a splicing structure, so that the processing cost and the processing period of the die are reduced; the movable half female die can move horizontally (namely move in the X direction), and when a part is taken, the movable half female die moves in the direction away from the fixed half female die through the auxiliary part taking mechanism, so that the female die is integrally separated, and a formed part with a negative angle can be taken out smoothly; the bulging force generated when the male die holder conducts guiding, fine positioning and workpiece transmission through the guide plate and the female die enables the die to deform little when the die is subjected to liquid bulging force, and the formed part is high in precision.
2. The auxiliary part taking mechanism adopts a screw connection mode, the whole structure is simple, the operation is convenient, the wedge block group is arranged, the outer wedge block is fixed, and the movable half female die and the fixed half female die are tightly attached through interaction with the inner wedge block, so that the installation is simple and convenient.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention.
FIG. 1 is a front, half sectional view of a mold structure of the present invention;
FIG. 2 is a half sectional view of a top view of the mold structure of the present invention;
FIG. 3 is a cross-sectional view of the take-off mechanism of the die structure of the present invention;
FIG. 4 is a cross-sectional view of the sealing mechanism of the die structure of the present invention;
in the figure:
1. a convex die holder; 2. a male die; 2-1, sealing grooves; 3. moving the half female die; 4. fixing the half female die; 5. a female die holder; 5-1, screw thread; 6. fixing the female die pressing plate; 7. a guide plate; 8. moving the female die pressing plate; 9. an X-direction outer wedge block; 10. an X-direction inner wedge block; 11. a Y-direction outer wedge; 12. a Y-direction inner wedge; 13. a hand wheel; 14. a lead screw; 15. a screw pressing plate; 16. and sealing the rubber strip.
Detailed Description
First, it should be noted that the specific structure, features, advantages, etc. of the die for press bending a negative-angle bulging part of the present invention will be specifically described below by way of example, however, all the descriptions are for illustrative purposes only and should not be construed as forming any limitation on the present invention. Furthermore, any single feature described or implicit in any embodiment herein or any individual feature shown or implicit in any drawing may continue to be combined or subtracted from any other feature (or equivalent) to obtain yet further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
Fig. 1 shows a half-section of a front view of the inventive die structure, and a half-section of a top view of the inventive die structure is shown by fig. 2, and a cross-section of the take-off mechanism of the inventive die structure is shown by fig. 3, and a cross-section of the sealing mechanism of the inventive die structure is shown by fig. 4.
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
the utility model provides a mould for bending bulging area negative angle part, as shown in fig. 1, including 2 seats of terrace die 1 and the die holder 5 that are distribution from top to bottom, install terrace die 2 on 2 seats of terrace die, install the die on the die holder 5, still including supplementary a mechanism of getting, the die includes the removal half die 3 and the fixed half die 4 that the concatenation constitutes, fixed half die 4 is fixed in on the die holder 5, remove half die 3 and can dismantle fixed connection through spacing and the die holder 5 of spacing subassembly, supplementary a mechanism of getting is installed on the die holder 5 that removes half die 3 one side, supplementary a mechanism of getting can drive under the spacing circumstances of half die 3 of removal not removing of spacing subassembly and remove half die 3 and do the relative motion that is close to or keeps away from to fixed half die 4 on the die holder 5 relatively.
Wherein the male die 2 is fastened in the male die 2 seat 1 through screws; the fixed half female die 4 is fastened in the female die holder 5 through a screw and a fixed female die pressing plate 6. When the workpiece is produced, the movable half female die 3 cannot move under the action of the limiting assembly and is in a tight state with the fixed half female die 4.
The female die adopts a split type splicing structure, so that the processing cost and the processing period of the die are reduced; the movable half female die 3 can move in the X direction, and when a part is taken, the movable half female die 3 moves in the direction away from the fixed half female die 4 through the auxiliary part taking mechanism, so that the female dies are integrally separated, and a formed part with a negative angle can be taken out smoothly; the convex die 2 seat 1 and the concave die guide plate 7 are used for guiding, precisely positioning and transmitting bulging force generated during workpiece forming, so that the deformation of the die is small when the die is subjected to liquid bulging force, and the formed part is high in precision.
The limiting assembly comprises a wedge block group and a pressing plate group, the wedge block group and the pressing plate group are detachably fixed on the die holder 5, the wedge block group limits the displacement in the X direction and the Y direction of the movable half die 3, and the pressing plate group limits the displacement in the Z direction of the movable half die 3. The wedge block group can generate extrusion force mutually in the fixing process, and the movable half female die 3 and the fixed half female die 4 are tightly attached.
The voussoir group is including outer voussoir, interior voussoir, voussoir extrusion interior voussoir and the lateral wall butt of removing half die 3 to carry on spacingly to the X and the Y direction of removing half die 3, outer voussoir passes through screw and can dismantle fixed connection with die holder 5.
As shown in FIG. 2, the outer wedge is divided into an X-direction outer wedge 9 and a Y-direction outer wedge 11, the inner wedge is divided into an X-direction inner wedge 10 and a Y-direction inner wedge 12, the X-direction outer wedge 9 and the X-direction inner wedge 10 cooperate to generate a pressing force to make the movable half concave die 3 abut against the fixed half concave die 4, and the Y-direction outer wedge 11 and the Y-direction inner wedge 12 cooperate to generate a pressing force to limit the Y-direction displacement of the movable half concave die 3.
The top of die holder 5 is equipped with the mounting groove, a lateral wall and the external world of mounting groove link up, die, wedge group and clamp plate group all install in the mounting groove.
The pressing plate group comprises at least two movable female pressing plates 8, a pressing edge is fixed on the outer wall of one side of the movable half female die 3, the movable female pressing plates 8 press the pressing edge to be fixed on the female die holder 5, and the pressing edge is located above the wedge block group. The movable female die pressing plate 8 is detachably and fixedly connected with the female die holder 5 through screws.
As shown in fig. 3, the auxiliary pickup mechanism includes a screw 14 and a screw 14 pressing block, one end of the screw 14 penetrates through the die holder 5 and extends into the mounting groove, the screw 14 is connected with the die holder 5 through a thread 5-1, the other end of the screw 14 is connected with the driving member, a T-shaped head is fixed at the end of the screw 14 in the mounting groove, two screw pressing blocks distributed vertically are fixed on the outer side wall corresponding to the moving half die 3 and the screw 14, the screw 14 pressing block is of an L-shaped structure, and the T-shaped head is clamped between the two screw 14 pressing blocks, so that the screw 14 can drive the moving half die 3 to move.
The driving piece is a hand wheel 13, and the hand wheel 13 is fixedly connected with a lead screw 14 on the outer side of the mounting groove.
When a workpiece is taken, a wedge block group and a movable female die pressing plate which are installed when the workpiece is taken off need to be dismounted, so that the movable half female die can move without limitation, the hand wheel 13 is connected with the lead screw 14 through a square pin, the hand wheel 13 rotates to drive the lead screw 14 to rotate, the lead screw 14 is meshed with an internal thread 5-1 machined on the female die holder 5, the lead screw 14 which is horizontally placed can horizontally move while rotating due to the fact that the internal thread 5-1 is fixed, the lead screw 14 is connected with the movable half female die 3 through the lead screw pressing plate 15, the lead screw pressing plate 15 transmits the force of the horizontal movement of the lead screw 14 without transmitting the rotating force, the lead screw 14 drives the movable half female die 3 to horizontally move, and the movable half female die 3 does not rotate. And after the movable half female die 3 moves horizontally, taking out the part with the negative angle.
The movable half female die 3 and the fixed half female die 4 are identical in structure and are symmetrically distributed along the central line of the female die.
A sealing groove 2-1 is machined on the male die 2, and a sealing rubber strip 16 is arranged in the sealing groove 2-1 and used for sealing high-pressure liquid during liquid filling forming, as shown in figure 4.
And guide plates 7 are respectively fixed on the outer side walls of the movable half-female die 3 and the fixed half-female die 4, and the male die 2 seat 1 is guided by the guide plates 7 with the female die in the downward moving process.
When a workpiece is manufactured, the convex die holder 1 is connected with forging equipment, and the equipment drives the convex die holder 1 and the convex die 2 to vertically move relative to other parts of the die so as to realize a press bending forming process; the bulging force generated when the guide plate 7 is used for guiding, precisely positioning and transmitting the workpiece is arranged between the convex die holder 1 and the movable half-female die 3, and the bulging force generated when the guide plate 7 is used for guiding, precisely positioning and transmitting the workpiece is arranged between the convex die holder 1 and the fixed half-female die 4.
High-pressure liquid enters the upper surface of the part through the male die 2, so that the part is deformed under the action of the high-pressure liquid until the lower surface of the part is completely attached to the movable half female die 3 and the fixed half female die 4.
In summary, the present invention can provide a mold for bending and bulging negative-angle parts, which can achieve the removal of the negative-angle parts and greatly reduce the manufacturing cost and the cycle time of the mold.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a mould for bending bulging area negative angle part, is including being the punch holder and the die holder that distribute from top to bottom, install the terrace die on the punch holder, install the die on the die holder, its characterized in that: still include supplementary a mechanism of getting, the die includes the half die of removal and the half die of fixing that the concatenation constitutes, fixed half die is fixed in on the die holder, fixed connection can be dismantled with the die holder to the spacing of removing half die through spacing subassembly, supplementary a mechanism of getting is installed on the die holder of removing half die one side, supplementary a mechanism of getting can do the relative motion that is close to or keeps away from on the die holder to the half die of relative fixation under the spacing circumstances of the half die of removal not to the drive of spacing subassembly.
2. A die for press bending an expanded negative angle part according to claim 1, wherein: the limiting assembly further comprises a wedge block group and a pressing plate group, the wedge block group and the pressing plate group are detachably fixed on the die holder, the wedge block group limits displacement in the X direction and the Y direction of the movable half-die, and the pressing plate group limits displacement in the Z direction of the movable half-die.
3. A die for press bending an expanded negative angle part according to claim 2, wherein: the wedge block set comprises an outer wedge block and an inner wedge block, the outer wedge block extrudes the inner wedge block to be abutted against the side wall of the movable half-female die so as to limit the X direction and the Y direction of the movable half-female die, and the outer wedge block is detachably and fixedly connected with the female die holder.
4. A die for press bending an expanded negative angle part according to claim 2, wherein: the die is characterized in that a mounting groove is formed in the top of the die holder, one side wall of the mounting groove is communicated with the outside, and the die, the wedge block group and the pressing plate group are all mounted in the mounting groove.
5. A die for press bending an expanded negative angle part according to claim 2, wherein: the pressing plate set comprises at least two movable female die pressing plates, a pressing edge is fixed on the outer wall of one side of each movable half female die, the movable female die pressing plates press the pressing edge to be fixed on the female die base, and the pressing edge is located above the wedge block set.
6. A die for press bending an expanded negative angle part according to claim 1, wherein: supplementary a mechanism of getting includes lead screw, lead screw briquetting, the one end of lead screw runs through the die holder and extends to the mounting groove in, lead screw and die holder threaded connection, the other end and the driving piece of lead screw are connected, lead screw end fixing in the mounting groove has T type head, be fixed with two lead screw briquetting that are distribution from top to bottom on removing half die and the lateral wall that the lead screw corresponds, the lead screw briquetting is L type structure, T type head card is between two lead screw briquetting to make the lead screw can drive and remove half die and remove.
7. A die for press bending bulging negative-angle parts according to claim 6, characterized in that: the driving piece is a hand wheel, and the hand wheel is fixedly connected with a lead screw on the outer side of the mounting groove.
8. A die for press bending an expanded negative angle part according to claim 1, wherein: the movable half female die and the fixed half female die are identical in structure and are symmetrically distributed along the central line of the female die.
9. A die for press bending an expanded negative angle part according to claim 1, wherein: and a sealing groove is processed on the male die, and a sealing rubber strip is arranged in the sealing groove.
10. A die for press bending an expanded negative angle part according to claim 1, wherein: and guide plates are respectively fixed on the outer side walls of the movable half female die and the fixed half female die, and the male die holder is guided with the female die through the guide plates in the downward moving process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196912.2A CN114011943A (en) | 2020-10-30 | 2020-10-30 | Die for bending and bulging part with negative angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196912.2A CN114011943A (en) | 2020-10-30 | 2020-10-30 | Die for bending and bulging part with negative angle |
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| Publication Number | Publication Date |
|---|---|
| CN114011943A true CN114011943A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011196912.2A Pending CN114011943A (en) | 2020-10-30 | 2020-10-30 | Die for bending and bulging part with negative angle |
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| CN (1) | CN114011943A (en) |
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