Aluminum alloy extrusion forming die convenient to position

Abstract

The utility model relates to the technical field of extrusion dies, and discloses an aluminum alloy extrusion forming die convenient to position. A lower die is fixedly connected to the middle of the upper end of a base, a positioning clamping cavity is formed in the upper end of the interior of the lower die, an extrusion cavity is formed in the bottom of the inner wall of the lower die, and an annular groove is formed in the upper end of the interior of the lower die; under the cooperation of the magnetorheological fluid in the annular groove and the electromagnet, the principle that the viscosity of the magnetorheological fluid changes under the action of a magnetic field is utilized, after the electromagnet is powered on, the magnetic field is generated, the viscosity of the magnetorheological fluid is increased under the action of the magnetic field, and the magnetorheological fluid is converted into a semi-solid state with certain rigidity from a liquid state. The magnetorheological fluid with the constant volume generates pressure on the periphery, the dovetail block is pushed to slide in the dovetail groove, then the arc-shaped positioning piece is driven to move towards the inner side, automatic clamping and positioning of aluminum alloy blanks of different specifications are achieved, therefore, the positioning time is greatly shortened, and the production efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to extrusion die technical field especially convenient positioning's aluminium alloy extrusion forming die. BACKGROUND

[0002] In the modern industrial production system, aluminum alloy occupies an indispensable position in many core fields such as aerospace, automobile manufacturing, construction engineering and the like due to a series of outstanding performances such as light weight, high strength, corrosion resistance and the like. As a mainstream processing technology, aluminum alloy extrusion forming precisely shapes aluminum alloy blanks into various complex shapes under high temperature and high pressure conditions with the aid of a die, so as to meet the strict demands of various industries on aluminum alloy products in terms of diversification and high precision. The die is a core carrier of the aluminum alloy extrusion forming process, and the performance thereof is directly related to the quality, production efficiency and cost control of aluminum alloy products.

[0003] The positioning structure in the die plays a decisive role and is a key element for ensuring the size precision and quality stability of aluminum alloy products. Traditional dies mostly adopt fixed positioning structures, which are difficult to adapt to the rapid positioning demands of aluminum alloy blanks of different specifications. When the blank specification is changed, a large amount of time is often consumed for die adjustment or reinstallation of positioning components, which seriously affects the production efficiency. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies that the fixed positioning structure is difficult to adapt to the rapid positioning demands of aluminum alloy blanks of different specifications, a large amount of time is often consumed for die adjustment or reinstallation of positioning components when the blank specification is changed, and the production efficiency is seriously affected, the utility model provides the aluminium alloy extrusion forming die convenient positioning, has the advantages such as flexible adjustment, automatic positioning, solves the problems mentioned in the background art.

[0005] The utility model provides following technical scheme: aluminium alloy extrusion forming die convenient positioning, including base, the upper end middle part of base is fixedly connected with lower mould, is equipped with the positioning clamping cavity in the inside upper end of lower mould, the bottom of the inner wall of lower mould is equipped with extrusion cavity, the inside upper end of lower mould is equipped with ring groove, the inside of ring groove is filled with magneto rheological fluid, the inboard of positioning clamping cavity is equipped with a plurality of arc locating piece, the inboard of a plurality of arc locating piece all is fixedly connected with swallow-tail block, the inner wall of positioning clamping cavity is evenly equipped with a plurality of swallow-tail groove, the inboard of swallow-tail groove is linked together with ring groove inside, the surface of swallow-tail block is slidably connected in the inside of swallow-tail groove, a plurality of swallow-tail blocks in ring groove inside one end all are fixedly connected with limit board, the upper end of the outer wall of lower mould is evenly fixedly connected with a plurality of electromagnet.

[0006] Preferably, the control terminal is electrically connected with the electromagnet.

[0007] By controlling the setting of the terminal and the electromagnet, the state of the magnetorheological fluid is accurately controlled, and the clamping force and positioning effect on the aluminum alloy blank are accurately adjusted.

[0008] Preferably, the upper end of the base is fixedly connected with positioning columns at four corners, the upper end of the positioning column is fixedly connected with a top plate, a movable frame is arranged between the top plate and the base, and the bottom of the top plate is fixedly connected with two hydraulic push rods.

[0009] Through the arrangement of the positioning column, the top plate, the movable frame and the hydraulic push rod, the movement of the upper die is stably controlled, and the aluminum alloy extrusion forming process is accurately and efficiently ensured.

[0010] Preferably, the four corners of the movable frame are slidingly connected to the surface of the plurality of positioning columns, the bottom of the hydraulic push rod is fixedly connected to the top of the movable frame, and the lower surface of the movable frame is fixedly connected with an upper die in the middle.

[0011] Through the cooperation of the movable frame, the positioning column, the hydraulic push rod and the upper die, the movement trajectory of the upper die is accurately controlled, the extrusion force is stably transmitted, and the aluminum alloy extrusion forming is efficiently completed.

[0012] Preferably, the upper end of the base is fixedly connected with buffer springs at four corners, and the top of the plurality of buffer springs is fixedly connected with a check ring.

[0013] Through the arrangement of the buffer spring and the check ring, the mold is protected, the service life of the mold is prolonged, and the production stability is improved.

[0014] Preferably, the plurality of buffer springs are respectively sleeved on the bottom outer side of the positioning column, and the inner side of the plurality of check rings is respectively slidingly connected to the bottom surface of the positioning column.

[0015] Through the arrangement of the check ring, the buffer effect is enhanced, and the stability of the mold structure is optimized.

[0016] The utility model has the following effects:

[0017] 1. Through the cooperation of the magnetorheological fluid in the ring groove and the electromagnet, the viscosity change principle of the magnetorheological fluid under the action of the magnetic field is utilized, when the electromagnet is powered on, the magnetic field is generated, the viscosity of the magnetorheological fluid increases under the action of the magnetic field, and the magnetorheological fluid changes from liquid to semi-solid with certain rigidity, the magnetorheological fluid with unchanged volume generates pressure around, pushes the dovetail block to slide in the dovetail groove, and then drives the arc-shaped positioning piece to move inward, realizes the automatic clamping and positioning of different specifications of aluminum alloy blanks, and greatly shortens the positioning time and significantly improves the production efficiency.

[0018] 2、Through the setting of the base, the buffer spring and the check ring, the elastic working principle of the buffer spring is utilized, in the extrusion process, when the upper die is pressed and contacted with the lower die, a great impact force is generated, the buffer spring can absorb the impact force by the elastic deformation of itself, the buffering effect is achieved, meanwhile, the check ring can prevent the excessive compression or displacement of the buffer spring, thereby the beneficial effects of protecting the mold and prolonging the service life of the mold are generated, the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of the utility model;

[0020] Figure 2 It is a lower die internal plan view structural schematic diagram of the utility model;

[0021] Figure 3 It is a lower die side part section structural schematic diagram of the utility model;

[0022] Figure 4 It is a base side part structural schematic diagram of the utility model.

[0023] In the drawing: 1, base;2, lower die;3, control terminal;4, positioning and clamping cavity;5, extrusion cavity;61, annular groove;62, magnetorheological fluid;63, limiting plate;64, dovetail block;65, arc-shaped positioning piece;66, dovetail groove;67, electromagnet;7, positioning column;8, top plate;9, hydraulic push rod;10, movable frame;11, upper die;12, buffer spring;13, check ring. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0025] Please refer to Figures 1-3, The utility model discloses a convenient positioning aluminum alloy extrusion forming die, including base 1, the upper end middle part of base 1 is fixedly connected with lower mould 2, the inside upper end of lower mould 2 is equipped with positioning clamping cavity 4, the inner wall bottom of lower mould 2 is equipped with extrusion cavity 5, the inside upper end of lower mould 2 is equipped with ring groove 61, and ring groove 61 is filled with magneto rheological fluid 62, and the lower mould 2 in ring groove 61 position selects ceramic fiber heat -insulating heat -resisting material material, can effectively insulate the influence of product temperature to magneto rheological fluid 62, through the cooperation of magneto rheological fluid 62 and electromagnet 67 in ring groove 61, the upper end of magneto rheological fluid 62 in ring groove 61 is reserved with tiny gap, on the one hand, although magneto rheological fluid 62 is changed from liquid to semi-solid state under the action of magnetic field, but in actual process, due to the micro arrangement change of magnetic particle and other factors, can produce extremely tiny volume increase, the gap 20 of reserving can accommodate this part of tiny volume change, avoid the tiny expansion of magneto rheological fluid 62 in ring groove 61 and produce excessive stress, prevent the additional pressure to the mould structure, guarantee the stability of whole positioning structure, on the other hand, when magneto rheological fluid 62 is changed into semi-solid state, the structure formed by the inside particle will produce the tendency of outward expansion, due to the limitation of ring groove 61, this expansion tendency mainly acts on each surface in contact with magneto rheological fluid 62, including the surface in contact with limiting plate 63, the existence of gap 20 makes magneto rheological fluid 62 not be too rigidly constrained when expanding, can more effectively transmit the pressure generated to limiting plate 63, reduces production cost and maintenance difficulty, utilizes the principle that the viscosity of magneto rheological fluid 62 changes under the action of magnetic field, when electromagnet 67 is electrified, produces magnetic field, and magneto rheological fluid 62 is changed from liquid to semi-solid state with certain rigidity under the action of magnetic field.

[0026] Please refer to Figure 2 , the inboard of positioning clamping cavity 4 is equipped with a plurality of arc-shaped positioning pieces 65, and the inboard of a plurality of arc-shaped positioning pieces 65 is fixedly connected with dovetail block 64, and the inner wall of positioning clamping cavity 4 is evenly provided with a plurality of dovetail grooves 66, and the inboard of dovetail groove 66 is communicated with the inside of ring groove 61, and the surface of dovetail block 64 is slidably connected in the inside of dovetail groove 66, and a plurality of dovetail blocks 64 are fixedly connected with limiting plate 63 at one end in the inside of ring groove 61, can effectively limit the sliding stroke of dovetail block 64 in dovetail groove 66, prevent dovetail block 64 from being taken out from dovetail groove 66, and the upper end of the outer wall of lower mould 2 is evenly fixedly connected with a plurality of electromagnets 67, and the coil of electromagnet 67 adopts high-temperature-resistant enameled wire, has high melting point, high insulation performance and good chemical corrosion resistance, will not lose insulation performance in high-temperature environment, guarantees the normal flow of current in the coil, and the magneto rheological fluid 62 of volume invariable is electrified and produces pressure around, pushes dovetail block 64 to slide in dovetail groove 66, and then drives arc-shaped positioning piece 65 to move to the inboard, realizes the automatic clamping positioning of different specifications aluminum alloy blank, thereby greatly shortens the positioning time, and significantly improves production efficiency.

[0027] Please refer to Figures 1-3 , a plurality of electromagnets 67 is energized and magnetically connected with the magnetorheological fluid 62, the base 1 side is fixedly connected with a control terminal 3, the control terminal 3 is electrically connected with the electromagnet 67, when the electromagnet 67 is connected with the current, according to the ampere rule, the current through the coil of the electromagnet 67 will generate a magnetic field, the magnetorheological fluid 62 in the ring groove 61 is affected by the magnetic field, the viscosity increases to become semi-solid, the limiting plate 63 is pushed by the pressure of the magnetorheological fluid 62, moves away from the center of the magnetorheological fluid 62, which drives the arc-shaped positioning piece 65 to move linearly in the positioning and clamping cavity 4, a plurality of arc-shaped positioning pieces 65 are folded inward or separated outward, so as to realize the positioning and clamping or loosening operation of the aluminum alloy blank.

[0028] Please refer to Figure 1 , the upper end of the base 1 is fixedly connected with a positioning column 7, the upper end of the positioning column 7 is fixedly connected with a top plate 8, the top plate 8 and the base 1 are provided with a movable frame 10, the bottom of the top plate 8 is fixedly connected with two hydraulic push rods 9, the four corners of the movable frame 10 are slidingly connected to the surface of the plurality of positioning columns 7, the positioning column 7 provides accurate guide for the movement of the movable frame 10, the four corners of the movable frame 10 slide on the surface of the positioning column 7, which ensures that it will not deviate or shake during the up and down movement, ensures that the upper die 11 can be accurately aligned with the lower die 2, improves the precision of aluminum alloy extrusion forming, the bottom of the hydraulic push rod 9 is fixedly connected to the top of the movable frame 10, and the lower surface of the movable frame 10 is fixedly connected with the upper die 11.

[0029] Please refer to Figure 4 , the upper end of the base 1 is fixedly connected with a buffer spring 12, the top of the plurality of buffer springs 12 is fixedly connected with a check ring 13, the plurality of buffer springs 12 is respectively sleeved on the bottom outside of the positioning column 7, and the inner side of the plurality of check rings 13 is respectively slidingly connected to the bottom surface of the positioning column 7, through the setting of the base 1, the buffer spring 12 and the check ring 13, the elastic working principle of the buffer spring 12 is utilized, in the extrusion process, when the upper die 11 is pressed down and contacted with the lower die 2, a large impact force will be generated, the buffer spring 12 can absorb this part of impact force by using its elastic deformation, plays a buffering role, at the same time, the check ring 13 can prevent the buffer spring 12 from being excessively compressed or displaced, thereby producing the beneficial effects of protecting the mold and prolonging the service life of the mold, reducing the production cost.

[0030] Working principle: In actual use, the aluminum alloy billet is first placed in the positioning and clamping cavity 4 of the lower mold 2. At this time, the control terminal 3 is activated, and the control terminal 3 sends an energizing command to the electromagnet 67. After the electromagnet 67 is energized, it generates a magnetic field. The magnetic field acts on the magnetorheological fluid 62 in the annular groove 61. Under the influence of the magnetic field, the internal structure of the magnetorheological fluid 62 changes, changing from a liquid state to a semi-solid state with a certain rigidity. As the viscosity of the magnetorheological fluid 62 increases, it will generate pressure on the surroundings, pushing the limiting plate 63 located in the annular groove 61. The dovetail block 64 will slide in the dovetail groove 66 along the set direction. The sliding of the dovetail block 64 drives the arc-shaped positioning piece 65 connected to it to move inward. Laterally moving, multiple arc-shaped positioning plates 65 gradually approach the aluminum alloy billet, achieving precise positioning of the billet. The hydraulic push rod 9 is activated, extending and pushing the movable frame 10 downward along the positioning column 7. After the upper die 11 contacts the aluminum alloy billet placed in the positioning clamping cavity 4, pressure continues to be applied. After the billet is shaped into a specific shape in the extrusion cavity 5, the hydraulic push rod 9 retracts, driving the movable frame 10 and the upper die 11 to move upward and reset. At the same time, the control terminal 3 sends a power-off command to the electromagnet 67, the electromagnet 67 loses its magnetic field, and the magnetorheological fluid 62 returns to a liquid state. At this time, the formed aluminum alloy product can be taken out, completing a complete aluminum alloy extrusion forming operation.

Claims

1. An aluminum alloy extrusion die for easy positioning, comprising a base (1), characterized in that: A lower mold (2) is fixedly connected to the upper middle part of the base (1). The upper part of the lower mold (2) is provided with a positioning clamping cavity (4). A squeezing cavity (5) is opened at the bottom of the inner wall of the lower mold (2). An annular groove (61) is opened at the upper part of the lower mold (2). The annular groove (61) is filled with magnetorheological fluid (62). Multiple arc-shaped positioning pieces (65) are provided on the inner side of the positioning clamping cavity (4). The inner sides of the multiple arc-shaped positioning pieces (65) are fixed. A dovetail block (64) is fixedly connected. The inner wall of the positioning and clamping cavity (4) is evenly provided with a plurality of dovetail grooves (66). The inner side of the dovetail groove (66) is connected to the inside of the annular groove (61). The surface of the dovetail block (64) is slidably connected to the inside of the dovetail groove (66). One end of the plurality of dovetail blocks (64) located inside the annular groove (61) is fixedly connected with a limit plate (63). A plurality of electromagnets (67) are evenly fixedly connected to the upper end of the outer wall of the lower mold (2).

2. The aluminum alloy extrusion die for convenient positioning according to claim 1, characterized in that: A control terminal (3) is fixedly connected to the side of the base (1), and the control terminal (3) is electrically connected to the electromagnet (67).

3. The aluminum alloy extrusion die for easy positioning according to claim 1, characterized in that: The base (1) has four fixed corners with positioning columns (7), and the top plate (8) is fixedly connected to the top of the positioning column (7). A movable frame (10) is provided between the top plate (8) and the base (1). Two hydraulic push rods (9) are fixedly connected to the bottom of the top plate (8).

4. The aluminum alloy extrusion die for easy positioning according to claim 3, characterized in that: The four corners of the movable frame (10) are slidably connected to the surface of multiple positioning columns (7), the bottom of the hydraulic push rod (9) is fixedly connected to the top of the movable frame (10), and the upper mold (11) is fixedly connected to the middle of the lower surface of the movable frame (10).

5. The aluminum alloy extrusion die for easy positioning according to claim 1, characterized in that: The base (1) has four corners at the top of which buffer springs (12) are evenly fixedly connected, and the top of the multiple buffer springs (12) is fixedly connected with retaining rings (13).

6. The aluminum alloy extrusion die for easy positioning according to claim 5, characterized in that: Multiple buffer springs (12) are respectively sleeved on the bottom outer side of the positioning post (7), and the inner sides of multiple retaining rings (13) are respectively slidably connected to the bottom surface of the positioning post (7).

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