WO2019174209A1

WO2019174209A1 - High-pressure liquid-filled forming mould for bellows

Info

Publication number: WO2019174209A1
Application number: PCT/CN2018/105761
Authority: WO
Inventors: 李经明; 欧阳翎; 唐利平
Original assignee: 佛山市南海兴迪机械制造有限公司; 河南兴迪锻压设备制造有限公司
Priority date: 2018-03-14
Filing date: 2018-09-14
Publication date: 2019-09-19
Also published as: CN108326109A

Abstract

Disclosed is a high-pressure liquid-filled forming mould for a bellows, the mould comprising a mould core (1), an upper pressing body (2) provided with an upper recess (101) at the bottom, and a lower pressing body (3) provided with a lower recess (102) at the top, wherein after the upper pressing body (2) and the lower pressing body (3) are assembled, an accommodating chamber with a rectangular cross-section is formed between the upper recess (101) and the lower recess (102); and plug push rod assemblies (4) are respectively mounted on left and right sides of the lower recess (102). After a pipe placed on a horizontal recess is compressed by the plug push rod assemblies (4), a high-pressure liquid is filled, so that the pipe is compressed, from the periphery and from a bottom surface, against a side wall of a forming recess (111) in a forming mould core (11), so as to form a corrugated shape. Since compression is carried out by the high-pressure liquid, an aluminum alloy plate is under substantially equal pressure at various positions, and thus, cracking, invisible damage, scratches, etc. caused by an excessive local stamping force can be eliminated, thereby greatly improving the quality of products.

Description

High-pressure liquid filling forming mold for bellows

Technical field

The present invention relates to the field of mold technology, and more particularly to a high pressure liquid filling forming mold for a bellows.

Background technique

In the process of cold stamping, the existing bellows is prone to cracking during the process of direct cold stamping due to the small rigidity of the aluminum alloy in the process of direct cold stamping. Dark spots, scratches, etc. How to reduce the cracking, dark injury and scratching caused by aluminum alloy in the stamping process is one of the important problems to be solved in this field.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a liquid-filled forming mold to solve the deficiencies in the prior art, which can avoid cracking, shading, scratching and the like during the stamping process.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A high-pressure liquid-filling forming die for a bellows, comprising a core, an upper pressing body having an upper groove at the bottom, and a lower pressing body having a lower groove at the top, wherein the upper pressing body and the lower pressing body are closed Forming a cavity having a rectangular cross section between the upper groove and the lower groove; a plug push rod assembly is disposed on the left and right sides of the lower groove; and the upper groove and the lower groove are respectively loaded a horizontally movable core having a fixed slider assembly at one end; the core is divided into a forming core, a movable core connected to the forming core; and the movable core is opened along a horizontal central axis There is a fixed arcuate groove having a shaped groove on the same horizontal central axis as the fixed arcuate groove.

As a preferred item, the forming groove is divided into an arc-shaped convex block and an arc-shaped concave position on one side of the curved convex piece, and the radius of the curved concave position is larger than the radius of the curved convex piece, so that the curved concave shape The position is stepped with the curved bump, and the radius of the curved bump is the same as the radius of the fixed arc groove.

As a preference, the forming core is divided into a middle forming die, a left forming die, and a right forming die, the left forming die and the right forming die being mirror-symmetrical, the middle forming die, left The horizontal movement can be relatively generated between the forming die and the right forming die.

As a preferred item, the upper and lower ends of the middle forming die are respectively provided with a "Π"-shaped horizontal plate, and the bottom end of the "Π"-shaped horizontal plate is provided with a limiting block; the left forming die, the right An outer side of the upper and lower ends of the forming die is provided with an "H"-shaped horizontal plate, and the "H"-shaped horizontal plate forms a chute I on the outer side and a chute II on the inner side, and the limiting block can be in the chute The inside of the I is horizontally moved; the left forming die and the right forming die are respectively nested by the "H" shaped horizontal plate.

As a preference, the fixed slider assembly comprises a cylinder mounted on the bottom of the lower pressing body and the top of the upper pressing body, a "U" shaped fixing block connected to the cylinder, and a horizontal rail connected to the "U" shaped fixing block; The horizontal rail is mounted on the bottom of the lower pressing body and the top of the upper pressing body, and the lower pressing body and the upper pressing body are respectively provided with two horizontal sliding grooves which are parallel to each other, and the "U" shaped fixing block passes through the parallel The chute is connected to the movable core.

As a preferred item, the plug push rod assembly includes a plug that extends into the fixed arcuate groove, the plug is mounted on the plug pressure plate, and the plug pressure plate is mounted on the plug push rod.

The invention has the beneficial effects that the liquid filling forming mold presses the pipe placed on the horizontal groove by the plug push rod assembly, and then is filled with the high pressure liquid, so that the pipe is pressed from the circumference and the bottom surface to the forming core. Forming the groove side wall to form a corrugated shape; since the pressure is applied by the high-pressure liquid, the pressure applied to the aluminum alloy material plate is substantially equal, thereby eliminating cracking and dark damage caused by excessive partial pressure. Scratches and other phenomena can greatly improve the quality of the product.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

Figure 1 is a perspective sectional view of the present invention;

Figure 2 is a perspective sectional view of the second embodiment of the present invention;

Figure 3 is an enlarged schematic view of a forming core of the present invention;

4 is an enlarged schematic view showing a fixed arc groove and a forming groove of the present invention;

Figure 5 is a schematic view of a left forming die of the present invention;

Figure 6 is a schematic view of a right forming die of the present invention;

Figure 7 is a schematic view of the movable core of the present invention;

Figure 8 is a schematic view of a first embodiment of the present invention;

Figure 9 is a schematic view of a second embodiment of the present invention.

detailed description

Referring to Figures 1-9, a high-pressure liquid-filling forming die for a bellows includes a core 1, an upper pressing body 2 having an upper groove 101 at the bottom, and a lower pressing body 3 having a lower groove 102 at the top. After the upper pressing body 2 and the lower pressing body 3 are clamped, a cavity having a rectangular cross section is formed between the upper groove 101 and the lower groove 102, and the cavity 1 is filled into the cavity; the lower groove The plug push rod assembly 4 is installed on both sides of the 102, and the pipe is pressed by the plug push rod assembly 4, and is filled with high-pressure liquid; the upper groove 101 and the lower groove 102 are horizontally mounted. a movable core 1 having a fixed slider assembly 5 at one end thereof, and the fixed slider assembly 5 can push the core 1 to move horizontally; the core 1 is divided into a forming core 11 and a forming core 11 connected movable core 12; the movable core 12 is provided with a fixed arcuate groove 121 along a horizontal central axis for placing a pipe, and the forming core 11 is opened with a fixed curved groove 121 Formed grooves 111 on the same horizontal central axis; in actual use, the tubes are placed in fixed arcuate grooves 121 and shaped grooves 111 on the same horizontal central axis After the pipe is pressed by the plug push rod assembly 4, and the high pressure liquid is filled, the pipe on the forming core 11 is pressed from the four sides and the bottom surface to the side wall of the forming groove 111, thereby forming the pipe wall The corrugated shape is formed, and the production of the bellows is completed. Since the pressing is performed by the high-pressure liquid, the pressure applied to the aluminum alloy material plate is substantially equal, so that cracking, darkness, and scratching due to excessive partial pressure can be eliminated. Such phenomena can greatly improve the quality of the product.

To further illustrate the formation of the tube on the forming core 11, as shown in FIGS. 3 and 4, the forming groove 111 is divided into an arcuate projection A1 and an arcuate recess A2 on the side of the arcuate projection A1. The radius of the arcuate concave position A2 is larger than the radius of the curved convex block A1, so that the curved concave position A2 and the curved convex block A1 are stepped, and the radius of the curved convex block A1 is fixed and concave. The radius of the groove 121 is the same; after the pipe is placed into the forming groove 111, the upper pressing body 2 and the lower pressing body 3 are closed, so that the side wall of the pipe is pressed against the curved convex block A1, and then the pipe is filled with high pressure. The liquid, because the radius of the arc-shaped recess A2 is smaller than the curved bump A1, causes the outer wall of the pipe to deform toward the arc-shaped recess A2 under the action of the high-pressure liquid, thereby causing the outer wall of the pipe to have a corrugated shape.

In order to increase the number of turns of the corrugations on the outer wall of the pipe, the above-mentioned forming core 11 is divided into a middle forming die 112, a left forming die 113, and a right forming die 114, and the left forming die 113 and the right forming die 114 are formed. For mirror symmetry, the middle forming die 112, the left forming die 113, and the right forming die 114 can be relatively horizontally moved. The middle forming die 112, the left forming die 113, and the right forming die can be selected as needed. The number of 114 is combined by a different number of the middle forming die 112, the left forming die 113, and the right forming die 114 to form a high-pressure liquid-filled pipe of different corrugations, so that the corrugation pitch on the bellows is uniform.

Further, the movement between the middle forming die 112, the left forming die 113, and the right forming die 114 is further illustrated. As shown in FIGS. 3-6, the upper and lower ends of the middle forming die 112 are provided with "Π". The horizontal plate B1 is provided with a limiting block B2 at the bottom ends of the horizontally-shaped horizontal plates B1; the left and right outer ends of the left forming die 113 and the right forming die 114 are provided with an "H"-shaped horizontal plate. B3, the "H"-shaped horizontal plate B3 is formed with a sliding groove IB31 on the outer side and a sliding groove IIB32 on the inner side, and the limiting block B2 is horizontally movable in the sliding groove IB31; The right forming dies 114 are respectively nested by the "H"-shaped horizontal plate B3, so that the movement between the middle forming die 112, the left forming die 113, and the right forming die 114 is smoother.

In actual use, the left forming die 113 and the right forming die 114 are respectively disposed on the left and right sides of the middle forming die 112, and the limiting blocks of the "Π"-shaped horizontal plate B1 of the upper and lower ends of the middle forming die 112 are respectively disposed. B2 is respectively placed in the chute IB31 of the "H"-shaped horizontal plate B3 at the upper and lower ends of the left forming die 113, and in the chute IB31 of the "H"-shaped horizontal plate B3 at the upper and lower ends of the right forming die 114, so that the left forming die is formed. The sheet 113 and the right forming die 114 are movable toward the middle forming die 112; and the lower end of the vertical plate outside the "H" shaped horizontal plate B3 at the upper and lower ends of the first left forming die 113 can be placed in the second left forming. In the sliding groove IB31 of the "H"-shaped horizontal plate B3 at the upper and lower ends of the die 113, and so on, a different number of left forming die 113 can be connected together, and the connection between the right forming die 114 is also left. The joining mode of the forming die 113; moving between different numbers of left forming die 113 and between different numbers of right forming die 114; and fixing the upper and lower ends of the movable core 12 with an "L" shape. The chute 122 is provided with a stopper 123 on the right side of the fixed chute 122. The lower end of the vertical plate outside the "H"-shaped horizontal plate B3 at the upper and lower ends of the left forming die 113 and the right forming die 114 is placed in the fixed chute 122, so that the forming core 11 is connected to the movable core 12, and the movable body 12 can be made movable. A relative movement between the core 12 and the forming core 11 occurs.

As shown in FIG. 1, in order to reset the core 1 after the forming process, a fixed slider assembly 5 is mounted on the core 1, and the fixed slider assembly 5 is mounted on the bottom of the lower pressing body 3 and the top of the upper pressing body 2. a cylinder 51, a "U"-shaped fixing block 52 connected to the cylinder 51, and a horizontal rail 53 connected to the "U"-shaped fixing block 52; the horizontal rail 53 is mounted on the bottom of the lower pressing body 3 and the top of the upper pressing body 2, The lower pressing body 3 and the upper pressing body 2 are respectively provided with two horizontal sliding grooves 301 which are parallel to each other, and the "U" shaped fixing block 52 is connected to the movable core 12 through the parallel sliding grooves 31; At the time of forming, the plug pusher assembly 4 pushes the movable core 12, and pushes the left forming die 113 and the right forming die 114 on the forming core 11 through the movable core 12 to form the left forming die 113 and the right forming die. The die 114 produces a movement toward the center forming die 112, and the outer wall of the pipe is machined to form a corrugation, while the movable core 12 is horizontally moved to compress the cylinder 51 by the movement of the "U" shaped block 52 on the horizontal rail 53. Cylinder 51 piston; when the forming process is completed, the cylinder 51 pushes the "U" shaped fixing block through the cylinder 51 piston 52, the "U"-shaped fixing block 52 is pulled to move the movable core 12, and the left forming die 113, the right forming die 114, and the middle forming die 112 are re-expanded to prepare for the next processing, thereby improving Processing efficiency.

As shown in FIG. 7, the plug push rod assembly 4 includes a plug 41 extending into the fixed arcuate groove 121. The plug 41 is mounted on the plug pressure plate 42, and the plug pressure plate 42 is mounted on the plug push rod. 43; during processing, the plug 41 is inserted into the pipe with the push of the plug push rod 43, and the two ends of the pipe are closed by the plug press plate 42, the plug 41 injects high-pressure liquid into the pipe, and maintains the liquid in the pipe. The high pressure makes the pipe form once and improves the yield of the product.

The liquid filling forming mold can select the combined forming core 11 and the movable core 12 according to the number of corrugated groups on the bellows. For example, the combination of the bellows processed with two corrugated groups is the movable core 12-forming core 11 - movable core 12 - forming core 11 - movable core 12, refer to FIG. 8; or two or more parallel tubes are arranged on the movable core 12 when two or more tubes are simultaneously processed The fixed arcuate grooves 121 above the group are provided with two or more sets of forming grooves 111 which are vertically parallel in the setting of the forming core 11 and can be referred to FIG.

According to the above principle, the present invention can also be appropriately modified and modified as described above. Therefore, the invention is not limited to the specific embodiments disclosed and described herein, and the modifications and variations of the invention are intended to fall within the scope of the appended claims.

Claims

A high-pressure liquid-filling forming mold for a bellows, comprising a core (1), an upper pressing body (2) having an upper groove (101) at the bottom, and a lower pressing body having a lower groove (102) at the top (3) The upper pressing body (2) and the lower pressing body (3) are clamped to form a cavity having a rectangular cross section between the upper groove (101) and the lower groove (102); The upper and lower sides of the lower groove (102) are provided with a plug push rod assembly (4); the upper groove (101) and the lower groove (102) are respectively provided with a horizontally movable core (1) a fixed slider assembly (5) is connected to one end of the core (1); the core (1) is divided into a forming core (11) and a movable core connected to the forming core (11). (12); the movable core (12) has a fixed arc groove (121) along a horizontal central axis, and the forming core (11) is open at the same level as the fixed arc groove (121) A shaped groove (111) on the central axis.
A high pressure liquid filling forming die for a bellows according to claim 1, wherein said forming groove (111) is divided into an arcuate projection (A1) and is located at an arcuate projection (A1) a curved concave position (A2) on one side, the radius of the curved concave position (A2) being larger than the radius of the curved convex portion (A1), between the curved concave position (A2) and the curved convex portion (A1) In a stepped shape, the radius of the arcuate projection (A1) is the same as the radius of the fixed arcuate groove (121).
A high-pressure liquid-filling forming die for a bellows according to claim 1, wherein the forming core (11) is divided into a middle forming die (112) and a left forming die (113). a right forming die (114), the left forming die (113) and the right forming die (114) being mirror symmetrical, the middle forming die (112), the left forming die (113), and the right forming die A horizontal movement is relatively generated between the sheets (114).
The high-pressure liquid-filling forming die for a bellows according to claim 3, wherein the upper and lower ends of the middle forming die (112) are provided with a "Π"-shaped horizontal plate (B1). The bottom end of each of the "Π"-shaped horizontal plates (B1) is provided with a limiting block (B2); the left forming die (113) and the right forming die (114) are provided with "H" on the outer sides of the upper and lower ends. a horizontal plate (B3), on the "H"-shaped horizontal plate (B3), a chute I (B31) on the outer side and a chute II (B32) on the inner side are formed, and the limit block (B2) can be Horizontal movement in the chute I (B31); between the left forming die (113) and the right forming die (114) are respectively nested by the "H" shaped horizontal plate (B3)
A high-pressure liquid-filling forming die for a bellows according to claim 1, wherein said fixed slider assembly (5) comprises a bottom portion of the lower pressing body (3) and an upper pressing body (2) a top cylinder (51), a "U" shaped fixing block (52) connected to the cylinder (51), a horizontal rail (53) connected to the "U" shaped fixing block (52); and the horizontal rail (53) On the bottom of the lower pressing body (3) and the top of the upper pressing body (2), the lower pressing body (3) and the upper pressing body (2) are provided with two horizontal sliding grooves (301) parallel to each other, A "U" shaped retaining block (52) is coupled to the movable core (12) through the parallel chute (31).
A high pressure liquid filling forming die for a bellows according to claim 1, wherein said plug pusher assembly (4) includes a plug that extends into a fixed arcuate groove (121) ( 41) The plug (41) is mounted on the plug pressure plate (42), and the plug pressure plate (42) is mounted on the plug push rod (43).