CN114951451A

CN114951451A - Hot forming die

Info

Publication number: CN114951451A
Application number: CN202210913104.6A
Authority: CN
Inventors: 游侠; 朱荣文; 游波; 王勇; 刘伟军
Original assignee: Chengdu Hongxia Technology Co Ltd
Current assignee: Chengdu Hongxia Technology Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-08-30

Abstract

The invention discloses a hot forming die, which comprises a female die, a male die and a piece ejector, wherein the female die is provided with a female die hole; the female die is of a rectangular structure, a rectangular forming groove is formed in the middle of the female die, two first supporting parts matched with parts are arranged on the female die, and the two first supporting parts are symmetrically arranged on two sides of the forming groove; the top part device is arranged in the forming groove and comprises a second supporting part and a connecting part which are sequentially arranged from top to bottom, the connecting part is matched with the forming groove, and the second supporting part is matched with the shape of the part. According to the forming die, the forming groove is formed in the female die, the ejector and the male die are matched, two long edges of a part can be folded simultaneously, the part is not required to be fixed twice, the part is formed at one time, the part forming efficiency is improved, when the part is supported by the first supporting part, the transverse displacement of the part is limited due to the V-shaped supporting structure, and the part can be prevented from moving transversely in the descending process of the male die.

Description

Hot forming die

Technical Field

The invention relates to the technical field of airplane part processing, in particular to a hot forming die.

Background

When the V-shaped thin-wall part of the airplane is processed, two long edges of the V-shaped thin-wall part need to be folded towards the protruding direction. In the existing machining process, a part is fixed through a tool, and after one side of the part is folded, the other side of the part is clamped again to be bent; in such a machining method, the parts are repeatedly fixed, and the hemming process is performed step by step, so that the machining efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a hot forming die, wherein the forming groove is arranged on a female die, the ejector and the male die are matched, so that two long edges of a part can be folded simultaneously, the part is not required to be fixed twice, the part is formed at one time, the part forming efficiency is improved, and when the part is supported by a first supporting part, the transverse displacement of the part is limited due to a V-shaped supporting structure, so that the part can be prevented from moving transversely in the process of descending the male die.

The purpose of the invention is realized by the following technical scheme:

a hot forming die comprises a female die, a male die and a piece ejecting device;

the female die is of a rectangular structure, a rectangular forming groove is formed in the middle of the female die, two first supporting parts matched with parts are arranged on the female die, and the two first supporting parts are symmetrically arranged on two sides of the forming groove;

the workpiece ejecting device is arranged in the forming groove and can vertically reciprocate in the forming groove, the workpiece ejecting device comprises a second supporting part and a connecting part which are sequentially arranged from top to bottom, the connecting part is matched with the forming groove, and the second supporting part is matched with the shape of a part; the bottom of the connecting part is provided with at least two ejector rods for driving the ejector to move;

a V-shaped groove matched with the second supporting part is formed in the male die;

two long edges of the part are symmetrically distributed on the two first supporting parts respectively, and the middle part of the part is pressed between the second supporting part and the V-shaped groove.

Furthermore, at least two positioning assemblies are arranged on the female die and used for positioning two long edges of the part, and the positioning assemblies are driven by the ejector rods.

Furthermore, a yielding groove perpendicular to the forming groove is formed in the first supporting part; at least two mounting holes vertical to the forming groove are formed in the female die;

the positioning assembly comprises a driving rod, a rack and a gear, the driving rod is rotatably arranged in the mounting hole through a bearing, the gear is arranged in the middle of the driving rod, the parts of the driving rod, which are positioned on two sides of the gear, are threaded rods with opposite rotation directions, the parts of the driving rod, which are positioned on two sides of the gear, are respectively provided with a nut seat in threaded fit with the driving rod, the nut seat is provided with a connecting rod, the end part of the connecting rod extends out of the first supporting part from the abdicating groove, and the extending end of the connecting rod is provided with a positioning plate;

the rack is arranged on the ejector rod, and the gear is meshed with the rack;

the nut seat is limited by the limiting part to rotate.

Furthermore, a connecting plate is arranged at one end, far away from the female die, of the male die.

Furthermore, the first supporting part and the female die are of an integrated structure.

Further, the second support part and the connecting part are of an integrated structure.

Furthermore, the limiting part is a slide rail, and the bottom of the nut seat is in sliding fit with the slide rail.

Further, the slide rail is a T-shaped slide rail or a dovetail slide rail.

Furthermore, a first limiting hole is formed in the male die, a second limiting hole corresponding to the first limiting hole is formed in the female die, and a limiting pin matched with the first limiting hole is fixedly arranged in the second limiting hole.

The invention has the beneficial effects that:

1) according to the forming die, the forming groove is formed in the female die, the ejector and the male die are matched, two long edges of a part can be folded simultaneously, the part is not required to be fixed twice, the part is formed at one time, the part forming efficiency is improved, and when the part is supported by the first supporting part, the transverse displacement of the part is limited due to the V-shaped supporting structure, so that the part can be prevented from moving transversely in the descending process of the male die;

2) according to the invention, by arranging the positioning assembly, the positioning and alignment of the part are automatically completed in the ascending process of the part ejecting device, the folding lengths of two long edges of the part are ensured to be the same, and the positioning assembly is driven by the ejector rod without arranging an additional driving device; the long limit positioning process of the part is automatically carried out, the positioning and the part ejecting device are carried out simultaneously in an ascending mode, extra positioning time does not need to be waited, manual positioning by depending on experience is not needed, the positioning process is fast and accurate, and the part forming efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention in an open state of a thermoforming mold;

FIG. 2 is a schematic view of an embodiment of the invention with a part compressed between the punch and the ejector;

FIG. 3 is a schematic view of a mold for molding a part;

FIG. 4 is a schematic structural view of a positioning assembly;

FIG. 5 is a schematic structural diagram of a positioning assembly with a limiting member;

FIG. 6 is a schematic view of the connection of the positioning assembly to the ejector pin;

FIG. 7 is a top view of the female mold;

FIG. 8 is a sectional view taken along line A-A of FIG. 7;

FIG. 9 is a sectional view taken along line B-B of FIG. 7;

in the figure, 1, a concave die; 2. a male die; 3. a piece ejector; 4. forming a groove; 5. a first support section; 6. a second support portion; 7. a connecting portion; 8. a top rod; 9. a V-shaped groove; 10. a positioning assembly; 11. a yielding groove; 12. mounting holes; 13. a drive rod; 14. a rack; 15. a gear; 16. a nut seat; 17. a connecting rod; 18. positioning a plate; 19. a limiting member; 20. a connecting plate; 21. a first limit hole; 22. a second limiting hole; 23. and (4) parts.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 9, the present invention provides a technical solution:

example (b):

as shown in fig. 1 to 3, a hot forming die includes a female die 1, a male die 2, and a knockout 3;

the female die 1 is of a rectangular structure, a rectangular forming groove 4 is formed in the middle of the female die 1, two first supporting parts 5 matched with the parts 23 are arranged on the female die 1, and the two first supporting parts 5 are symmetrically arranged on two sides of the forming groove 4;

the workpiece ejecting device 3 is arranged in the forming groove 4, the workpiece ejecting device 3 can vertically reciprocate in the forming groove 4, the workpiece ejecting device 3 comprises a second supporting part 6 and a connecting part 7 which are sequentially arranged from top to bottom, the connecting part 7 is matched with the forming groove 4, and the second supporting part 6 is matched with the part 23 in shape; the bottom of the connecting part 7 is provided with two ejector rods 8 for driving the ejector 3 to move;

a V-shaped groove 9 matched with the second supporting part 6 is formed in the male die 2;

the two long sides of the part 23 are symmetrically distributed on the two first supporting parts 5 respectively, and the middle part of the part 23 is pressed between the second supporting part 6 and the V-shaped groove 9.

And a connecting plate 20 is arranged at one end of the male die 2, which is far away from the female die 1. The connecting plate 20 is provided to facilitate connection with a hydraulic cylinder or a piston rod of a cylinder.

The male die 2 is driven by a hydraulic cylinder or an air cylinder to do linear motion along the vertical direction, and the ejector rod 8 is a machine tool ejector rod 8 or driven by the hydraulic cylinder or the air cylinder.

The working principle is as follows: firstly, the die is opened to separate the male die 2 from the female die 1, and the male die 2 moves upwards to leave the female die 1 in the separation process, so that a feeding space is reserved between the male die 2 and the female die 1. Then the part 23 is placed on the female die 1, the two long sides of the part 23 are symmetrically and uniformly distributed on the two first supporting parts 5, and the middle part of the part 23 is positioned above the forming groove 4.

Next, the lift pin 8 moves upward until the second support 6 is flush with the first support 5, and the part 23 is supported by the first support 5 and the second support 6.

Then, the male die 2 moves downwards to clamp the part 23 between the male die 2 and the ejector 3 (the V-shaped groove 9 and the second support part 6), and after clamping, the male die 2 continues to move downwards into the forming groove 4. And (3) in the process of descending the male die 2, the middle part of the part 23 cannot deform due to the limitation of the second supporting part 6 and the male die 2, and the two long edges of the part 23 are formed (namely, the edge folding is completed) in the process.

And finally, the male die 2 moves upwards to open the die again, after the die is opened, the ejector rod 8 drives the ejector 3 to move upwards to eject the part 23 out of the forming groove 4 of the female die 1, and the formed part 23 is taken out to finish the processing of the part 23.

Wherein, the process is as follows: when the part 23 is supported by the first supporting part 5, the transverse displacement (here, the transverse direction refers to the length direction of the forming groove 4) of the part 23 is limited due to the V-shaped supporting structure, and the part 23 can not move transversely in the descending process of the male die 2.

According to the forming die, the forming groove 4 is formed in the female die 1, the ejector 3 and the male die 2 are matched, two long edges of the part 23 can be folded simultaneously, the part 23 does not need to be fixed twice, the part 23 is formed at one time, the forming efficiency of the part 23 is improved, when the part 23 is supported by the first supporting part 5, the transverse displacement of the part 23 is limited due to the V-shaped supporting structure, and the part 23 can be prevented from moving transversely in the descending process of the male die 2.

Further, as shown in fig. 4-9, two positioning assemblies 10 are arranged on the female die 1, the positioning assemblies 10 are used for positioning two long edges of the part 23, and the positioning assemblies 10 are driven by the ejector rods 8.

The first supporting part 5 is provided with a yielding groove 11 which is vertical to the forming groove 4; two mounting holes 12 vertical to the forming groove 4 are arranged in the female die 1;

the positioning assembly 10 comprises a driving rod 13, a rack 14 and a gear 15, the driving rod 13 is rotatably arranged in the mounting hole 12 through a bearing, the gear 15 is arranged in the middle of the driving rod 13, the parts of the driving rod 13, which are positioned at two sides of the gear 15, are threaded rods with opposite rotation directions, the parts of the driving rod 13, which are positioned at two sides of the gear 15, are respectively provided with a nut seat 16 in threaded fit with the driving rod 13, the nut seat 16 is provided with a connecting rod 17, the end part of the connecting rod 17 extends out of the abdicating groove 11 to the first supporting part 5, and the extending end of the connecting rod 17 is provided with a positioning plate 18;

the rack 14 is arranged on the top rod 8, and the gear 15 is meshed with the rack 14;

the nut base 16 is restricted from rotating by a stopper 19.

The first supporting part 5 and the female die 1 are of an integrated structure.

The second support portion 6 and the connecting portion 7 are integrated.

The limiting part 19 is a slide rail, and the bottom of the nut seat 16 is in sliding fit with the slide rail.

The slide rail is a T-shaped slide rail or a dovetail slide rail.

During the use, place part 23 on two first supporting part 5 wantonly, need not to adjust the long limit position of part 23, go upward the process at a ware 3, the long limit position of part 23 is by locating component 10 automatically regulated.

The specific adjusting process is as follows: and in the ascending process of the ejector rod 8, the rack 14 on the ejector rod 8 is synchronous, the rack 14 drives the gear 15 to rotate in the ascending process, and the gear 15 drives the driving rod 13 to synchronously rotate when rotating. During the rotation of the driving rod 13, the two nut seats 16 move towards each other under the action of the threaded rod (specifically, the screw rod and slider principle, which is not described herein, wherein the nut seats 16 are limited by the sliding rail to rotate). When the nut seat 16 moves, the connecting rod 17 and the positioning plate 18 on the nut seat move synchronously. When the two positioning plates 18 move oppositely, the same moving speed is always kept to be symmetrical by taking the forming groove 4 as a symmetry axis.

When the positioning plates 18 move, the long edges of the parts 23 are pushed (the long edges of the parts 23 occupy larger edges on the first supporting seat and are firstly contacted with the corresponding positioning plates 18), and when the ejector rod 8 is in place, the distance between the two positioning plates 18 is just the width of the parts 23. At this moment, the part 23 is clamped between the two positioning plates 18 and positioned by the two positioning plates 18, so that two long edges of the part 23 are just guaranteed to be symmetrically and uniformly distributed on the two first supporting parts 5, the subsequent forming quality can be guaranteed, and the length of the folded edge on the long edge is guaranteed to be the same.

Because the part 23 is clamped by the ejector 3 and the male die 2, the positions of two long edges of the part 23 cannot be changed before edge folding, and in the process, the rack 14 drives the gear 15 to rotate reversely when the ejector 3 moves downwards, so that the two positioning plates 18 are separated from the part 23, and the edge folding is prevented from being influenced by the positioning plates 18 (such as friction force) in the edge folding process. When the part 23 is molded and ejected, although the positioning plate 18 still moves oppositely, the two long sides of the positioning plate 18 are bent, so that the positioning plate 18 cannot clamp the part 23, and the positioning plate 18 is prevented from influencing the demolding of the part 23.

The purpose of the two sets of positioning assemblies 10 is to avoid tilting of the part 23.

According to the invention, by arranging the positioning assembly 10, the positioning and alignment of the part 23 are automatically completed in the ascending process of the part ejecting device 3, the lengths of the folded edges of the two long edges of the part 23 are ensured to be the same, and the positioning assembly 10 is driven by the ejector rod 8 without arranging an additional driving device; the long edge positioning process of the part 23 is automatically carried out, the positioning and the part ejecting device 3 are carried out simultaneously in an ascending mode, extra positioning time does not need to be waited, manual positioning by depending on experience is not needed, the positioning process is fast and accurate, and the forming efficiency of the part 23 is greatly improved.

Further, as shown in fig. 2, a first limiting hole 21 is formed in the male die 2, a second limiting hole 22 corresponding to the first limiting hole 21 is formed in the female die 1, and a limiting pin adapted to the first limiting hole 21 is fixedly arranged in the second limiting hole 22. The limiting pin is used for positioning the male die and preventing the male die from moving transversely in the part forming process.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A hot forming die is characterized in that: comprises a female die, a male die and a piece ejecting device;

2. A thermoforming mold as claimed in claim 1, wherein: the die is provided with at least two positioning assemblies, the positioning assemblies are used for positioning two long edges of a part, and the positioning assemblies are driven by ejector rods.

3. A thermoforming mold as claimed in claim 2, wherein: the first supporting part is provided with a yielding groove perpendicular to the forming groove; at least two mounting holes vertical to the forming groove are formed in the female die;

the rack is arranged on the ejector rod, and the gear is meshed with the rack;

the nut seat is limited by the limiting piece to rotate.

4. A thermoforming mold as claimed in claim 1, wherein: and a connecting plate is arranged at one end of the male die, which is far away from the female die.

5. A thermoforming mold as claimed in claim 1, wherein: the first supporting part and the female die are of an integrated structure.

6. A thermoforming mold as claimed in claim 1, wherein: the second supporting part and the connecting part are of an integrated structure.

7. A thermoforming mold as claimed in claim 3, wherein: the limiting part is a sliding rail, and the bottom of the nut seat is in sliding fit with the sliding rail.

8. A thermoforming mold as claimed in claim 7, wherein: the slide rail is a T-shaped slide rail or a dovetail slide rail.

9. A thermoforming mold as claimed in claim 1, wherein: the male die is provided with a first limiting hole, the female die is provided with a second limiting hole corresponding to the first limiting hole, and a limiting pin matched with the first limiting hole is fixedly arranged in the second limiting hole.