Reverse extrusion die device for metal difficult to deform

Abstract

The invention discloses a difficult-to-deform metal reverse extrusion die device, and belongs to the technical field of metal extrusion dies. A base is included; a turntable and a driving mechanism; the multiple reverse extrusion dies are arranged around the rotary table by a circle at the top of the rotary table; the reverse extrusion die comprises a cavity, an extrusion block of the cavity and a workpiece demolding mechanism; a pressing plate and a pressing block; the pressing blocks are evenly arranged along the bottom end face of the pressing plate by a circle, the number and the vertical positions of the pressing block reverse extrusion dies are consistent, the lengths of the pressing blocks arranged along the rotary table by a circle are gradually increased, and the last pressing block is the manufactured length of a workpiece. The material pushing mechanism is a coaxial annular piece arranged on the outer side of the rotary table; material pushing rings corresponding to the reverse extrusion die cavities and the pressing blocks in number and position are uniformly arranged on a circle of the material pushing mechanism; and the material pushing rings drive workpieces to be formed to transfer in different cavities. According to the difficult-to-deform metal reverse extrusion die device provided by the invention, a plurality of extrusion dies with different extrusion levels are arranged in a manner of rotating an assembly line to forge a workpiece, so that the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal extrusion dies, and more specifically to a reverse extrusion die device for difficult-to-deform metals. Background Art

[0002] Difficult-to-deform metals refer to metal materials that have high deformation resistance and severe work hardening during processing, and are usually used in aerospace and automotive fields. Due to their physical properties, difficult-to-deform metals are usually processed by cutting, milling or forging. Existing cutting and milling methods will cause material waste when processing some difficult-to-deform metal hollow shafts due to the need to drill holes; in the casting extrusion process, the forward extrusion process also causes material waste, and the reverse extrusion process is preferred.

[0003] The current casting process of difficult-to-deform materials usually adopts heating-blank making-heating-extrusion-post-processing. Since the difficult-to-deform metal needs to be heated again after preparation, otherwise the final forging temperature cannot be reached, continuous workpiece transfer will lead to low production efficiency. Based on the above problems, we propose a difficult-to-deform metal back-extrusion die device suitable for hollow shafts. Summary of the invention

[0004] In order to overcome the problems in the above-mentioned background technology, the present invention provides a difficult-to-deform metal reverse extrusion die device, which sets multiple levels of extrusion dies in a rotating assembly line manner, allowing the metal workpiece to be quickly switched from blanking to forming. At the same time, multiple workpieces can be processed in sequence, thereby improving the hollow shaft forming efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: A reverse extrusion die for difficult-to-deform metals. Including base; The turntable and the driving mechanism are both arranged on the top of the base, and the driving mechanism drives the turntable to rotate horizontally on the top of the base; A reverse extrusion die, wherein a plurality of reverse extrusion dies are arranged around the turntable on the top of the turntable; the reverse extrusion die comprises a cavity, an extrusion block of the cavity, and a workpiece demoulding mechanism; The pressing plate and the pressing block, the pressing plate and the turntable are coaxially arranged, and the middle of the top of the pressing plate is connected to the output end of the extruder; the pressing blocks are evenly arranged along the bottom end surface of the pressing plate, the number of pressing blocks and the reverse extrusion die and the vertical position are consistent, the length of the pressing blocks arranged along the turntable is gradually increased, and the last pressing block is the finished length of the workpiece; The pushing mechanism is a coaxial ring-shaped member arranged on the outside of the turntable; the inner side of the pushing mechanism is fixedly connected to the outer wall of the turntable through multiple connecting rods; the pushing mechanism is evenly arranged with pushing rings corresponding to the number and position of the cavities and pressure blocks of the back extrusion die, and the pushing rings drive the workpiece to transfer in different cavities.

[0006] Preferably, it also includes a material return mechanism, which is a cylinder, and the output end of the material return mechanism faces the last cavity outside the device and pushes the molded part away from the device.

[0007] Preferably, the pushing mechanism also includes a movable block, a pushing ring opens toward the outside of the device, and movable blocks are arranged on both sides of the pushing ring opening, one end of the movable block is rotatably connected to the pushing mechanism body through a hinge; a first reset spring for driving the movable block to reset is also connected between the movable block and the pushing mechanism body.

[0008] Preferably, a support column is provided on the top of the base; a rotating connecting seat rotatably connected to the top of the support column is provided in the middle position of the bottom of the turntable; a rotating shaft is vertically installed inside the support column, and the bottom of the rotating shaft is fixed to the bottom of the turntable and coaxially arranged therewith; a driven wheel is connected to the lower end of the rotating shaft; a motor is installed on the side wall of the support column, the output end of the motor passes through the side wall of the support column, and a driving wheel meshing with the driven wheel is installed at the output end of the support column.

[0009] Preferably, the back-extrusion die also includes a sleeve, a movable groove, a connecting column and a second return spring. The sleeve is vertically fixed to the bottom of the extrusion block and coaxially arranged with the extrusion block. The sleeve is hollow and has an opening at the bottom. The sleeve is slidably installed in the movable groove arranged at the bottom of the cavity. A connecting column is vertically installed at the bottom of the inner wall of the movable groove. The top of the connecting column passes through the sleeve. The outside of the connecting column is also sleeved with a second return spring for driving the sleeve and the extrusion block to return to their original position.

[0010] Preferably, a limiting groove is arranged around the bottom opening of the cavity, which is arranged obliquely upward and smoothly transitions with the top surface of the pushing mechanism.

[0011] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The present invention provides a difficult-to-deform metal reverse extrusion die device, which sets multiple levels of extrusion dies in a rotating assembly line manner, so that the metal workpiece can be quickly switched from blanking to forming, and multiple workpieces can be processed in sequence, thereby improving the hollow shaft forming efficiency. Specifically: The motor drives the turntable to rotate, and the push ring on the push mechanism drives different workpieces into the device in turn. When different pressing blocks are pressed down, they will squeeze the passing workpieces in the state of the position in turn. Finally, the workpiece runs a circle, completing the process from embryo making to molding. The turntable can be rotated by a stepper motor or in conjunction with a displacement sensor to ensure accuracy. In the initial state, the top surface of the extrusion block in the reverse extrusion mold cavity is close to the top of the cavity, and when the push ring moves, the workpiece at this position can be taken away; the specific extrusion process is that the pressure block enters the cavity under the action of the pressure plate, the sleeve enters the movable groove and squeezes the second reset spring, the first pressure block squeezes the workpiece, and the extrusion block under the workpiece is positioned at the bottom until the first extrusion block completes the extrusion. After the extrusion mechanism is reset, the spring pushes the sleeve and the extrusion block to reset, and the push ring moves, driving the workpiece to be formed to move to the next reverse extrusion die; The pushing mechanism can push the extruded workpiece away from the device. On this basis, the pushing ring is opened and movable blocks are set on both sides of the opening. The movable blocks can be flipped outward to facilitate pushing. At the same time, the first reset spring is reset after the pushing is completed, and the following process continues. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the top view of the base and the turntable of the present invention; Figure 3 It is a schematic diagram of the overall structure of the pressing plate and the pressing block of the present invention; Figure 4 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the front cross-sectional structure of the reverse extrusion die of the present invention; Figure 6 It is a schematic diagram of the structure of the extrusion process of a workpiece in different reverse extrusion dies of the present invention.

[0014] Explanation of marks in the figure: 1. base; 2. turntable; 3. support column; 4. rotating connecting seat; 5. rotating shaft; 6. driven wheel; 7. motor; 8. driving wheel; 9. pushing mechanism; 91. pushing ring; 92. movable block; 93. hinge; 94. first return spring; 10. pressure plate; 11. pressure block; 12. material withdrawal mechanism; 13. back extrusion die; 131. cavity; 132. limiting groove; 133. extrusion block; 134. sleeve; 135. movable groove; 136. connecting column; 137. second return spring; 14. connecting rod. DETAILED DESCRIPTION

[0015] In order to better understand the purpose, structure and function of the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0016] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the parts, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the scope of protection of the present invention. It is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0017] Unless otherwise clearly specified and limited, the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0018] like Figure 1-3 , Figure 5 and Figure 6 As shown, the present invention provides a difficult-to-deform metal reverse extrusion die device, including a base 1; a turntable 2 and a driving mechanism, the turntable 2 and the driving mechanism are both arranged on the top of the base 1, and the driving mechanism drives the turntable 2 to rotate horizontally on the top of the base 1.

[0019] like Figure 2 and Figure 5 As shown, a plurality of reverse extrusion dies 13 are arranged around the turntable 2 on the top of the turntable 2 ; the reverse extrusion dies 13 include a cavity 131 , an extrusion block 133 of the cavity 131 , and a workpiece demoulding mechanism.

[0020] More specifically, the workpiece demoulding mechanism includes a sleeve 134, a movable groove 135, a connecting column 136 and a second return spring 137. The sleeve 134 is vertically fixed to the bottom of the extrusion block 133 and is coaxially arranged with the extrusion block 133. The sleeve 134 is hollow and has an opening at the bottom. The sleeve 134 is slidably installed in the movable groove 135 arranged at the bottom of the cavity 131. A connecting column 136 is vertically installed at the bottom of the inner wall of the movable groove 135. The top of the connecting column 136 penetrates into the sleeve 134. The second return spring 137 for driving the sleeve 134 and the extrusion block 133 to return to their original position is also sleeved on the outside of the connecting column 136. In this state, the top surface of the extrusion block 133 is connected to the top opening of the cavity 131, reserving a certain space for the workpiece. When the workpiece enters the upper part, it can enter the cavity 131 for alignment; when the pressing block 11 is pressed down, the extrusion block 133 moves down and finally positions itself on the bottom fitting surface, and the pressing block 11 continues to press down to complete the reverse extrusion process. After the processing is completed, the sleeve 134 under the extrusion block 133 moves up in the movable groove 135 under the action of the second reset spring 137, and pushes the extrusion block 133 to reset in the cavity 131, and finally enters the initial position. At this time, the workpiece can be pushed to the next processing position by the pushing mechanism 9.

[0021] like Figure 2 , Figure 3 and Figure 6 As shown, the pressing plate 10 and the pressing blocks 11, the pressing plate 10 and the turntable 2 are coaxially arranged, and the middle of the top of the pressing plate 10 is connected to the output end of the extruder; the pressing blocks 11 are evenly arranged along the bottom end surface of the pressing plate 10, the number and vertical positions of the pressing blocks 11 and the back extrusion die 13 are consistent, the length of the pressing blocks 11 arranged along the turntable 2 gradually increases, and the last pressing block 11 is the finished length of the workpiece.

[0022] like Figure 2 As shown, the pushing mechanism 9 is a coaxial annular member arranged on the outside of the turntable 2; the inner side of the pushing mechanism 9 is fixedly connected to the outer wall of the turntable 2 through multiple connecting rods 14; the pushing mechanism 9 is evenly arranged with pushing rings 91 corresponding to the number and position of the cavities 131 and the pressing blocks 11 of the back extrusion die 13, and the pushing rings 91 drive the workpiece to be formed to transfer in different cavities 131.

[0023] More specifically, Figure 2 As shown, the device also includes a material return mechanism 12, which is a cylinder. The output end of the material return mechanism 12 faces the last cavity 131 outside the device and pushes the molded part away from the device. The material return mechanism 12 is connected to the device power supply and the main control panel. When the workpiece in the last cavity 131 is processed and moved to the top of the cavity 131 with the cooperation of the above-mentioned demolding mechanism, the material return mechanism 12 can move the workpiece to the outside of the device and cooperate with the blanking collection component to complete the workpiece collection.

[0024] More specifically, Figure 4 As shown, the pushing mechanism 9 also includes a movable block 92, and the pushing ring 91 is open toward the outside of the device. Movable blocks 92 are arranged on both sides of the opening of the pushing ring 91. One end of the movable block 92 is rotatably connected to the main body of the pushing mechanism 9 through a hinge 93; a first reset spring 94 for driving the movable block 92 to return to its original position is also connected between the movable block 92 and the main body of the pushing mechanism 9. On the basis of the above-mentioned material withdrawal mechanism 12, an opening is provided on the outer side of the pushing ring 91 so that the workpiece can be withdrawn smoothly. On this basis, the movable block 92 is arranged in the non-material withdrawal state to block the workpiece to prevent the workpiece from falling out of the device during movement. In the material withdrawal state, the two movable blocks 92 are opened to complete the material withdrawal. At the same time, after the material withdrawal is completed, the first reset spring 94 drives the movable block 92 to return to its original position.

[0025] More specifically, Figure 5 As shown, a circle of the bottom opening of the cavity 131 is provided with a limit groove 132 which is arranged obliquely upward and smoothly transitions with the top surface of the pushing mechanism 9. The functions of the limit groove 132 are, firstly, to facilitate demoulding, and secondly, to guide the workpiece when the workpiece is transferred to the top of the cavity 131; thirdly, the smoothly transitioned opening edge facilitates the pushing ring 91 of the pushing mechanism 9 to move the workpiece without jamming.

[0026] More specifically, Figure 1 As shown, a support column 3 is provided on the top of the base 1; a rotating connecting seat 4 rotatably connected to the top of the support column 3 is provided in the middle position of the bottom of the turntable 2; a rotating shaft 5 is vertically installed inside the support column 3, and the bottom of the rotating shaft 5 is fixed to the bottom of the turntable 2 and is coaxially arranged therewith; a driven wheel 6 is connected to the lower end of the rotating shaft 5; a motor 7 is installed on the side wall of the support column 3, and the output end of the motor 7 passes through the side wall of the support column 3, and a driving wheel 8 meshing with the driven wheel 6 is installed at the output end of the support column 3. The motor 7 is a stepper motor, which is connected to the power supply and the main control panel of the device; it can be used in conjunction with a displacement sensor. When the workpiece arrives, the stepper motor does not work. After the workpiece is extruded, the motor 7 works and drives the pushing ring 91 on the pushing mechanism 9 to drive the workpiece to the next position. The displacement sensor receives the next workpiece into the mold signal, and the motor 7 stops working to complete a transfer work.

[0027] The difficult-to-deform metal reverse extrusion die device of the present application is suitable for reverse extrusion molding of metal shafts. It can quickly extrude metal hollow shafts by means of a rotating assembly line. Compared with the existing situation where difficult-to-deform metal materials need to be heated after embryonic preparation before extrusion, the present device can quickly transfer metal parts in extrusion dies of different levels. During the molding process of a workpiece, the temperature will not be lower than the final forging temperature, which saves a lot of time and improves the molding efficiency of metal parts. At the same time, it is equipped with a material return mechanism for convenient material return, with a reasonable structure and strong practicality.

[0028] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A reverse extrusion die device for hard-to-deform metals, characterized in that: comprising a base (1); A turntable (2) and a driving mechanism, wherein the turntable (2) and the driving mechanism are both arranged on the top of the base (1), and the driving mechanism drives the turntable (2) to rotate horizontally on the top of the base (1); A reverse extrusion die (13), wherein a plurality of reverse extrusion dies (13) are arranged on the top of the turntable (2) and around the turntable (2); the reverse extrusion die (13) comprises a mold cavity (131), an extrusion block (133) of the mold cavity (131), and a workpiece demoulding mechanism; The pressing plate (10) and the pressing block (11), the pressing plate (10) and the turntable (2) are coaxially arranged, and the middle of the top of the pressing plate (10) is connected to the output end of the extruder; the pressing blocks (11) are evenly arranged along the bottom end surface of the pressing plate (10), the number and vertical position of the pressing blocks (11) and the counter-extrusion die (13) are consistent, the length of the pressing blocks (11) arranged along the turntable (2) gradually increases, and the last pressing block (11) is the finished length of the workpiece; The push mechanism (9) is a coaxial annular member arranged outside the turntable (2); the inner side of the push mechanism (9) is fixedly connected to the outer wall of the turntable (2) via a plurality of connecting rods (14); the push mechanism (9) is evenly arranged with push rings (91) corresponding to the number and position of the cavities (131) and the pressing blocks (11) of the reverse extrusion die (13), and the push rings (91) drive the workpiece to be formed to transfer between different cavities (131).

2. The reverse extrusion die device for hard-to-deform metals according to claim 1, characterized in that: It also includes a material return mechanism (12), which is a cylinder. The output end of the material return mechanism (12) faces the last cavity (131) outside the device and pushes the molded part away from the device.

3. The reverse extrusion die device for hard-to-deform metals according to claim 2, characterized in that: The push mechanism (9) further comprises a movable block (92); the push ring (91) is open toward the outside of the device; movable blocks (92) are arranged on both sides of the opening of the push ring (91); one end of the movable block (92) is rotatably connected to the main body of the push mechanism (9) via a hinge (93); and a first return spring (94) for driving the movable block (92) to return to its original position is also connected between the movable block (92) and the main body of the push mechanism (9).

4. The reverse extrusion die device for hard-to-deform metals according to claim 1, characterized in that: A support column (3) is arranged at the top of the base (1); a rotating connection seat (4) rotatably connected to the top of the support column (3) is arranged at the middle position of the bottom of the turntable (2); a rotating shaft (5) is vertically installed inside the support column (3), and the bottom of the rotating shaft (5) is fixed to the bottom of the turntable (2) and arranged coaxially therewith; the lower end of the rotating shaft (5) is connected to a driven wheel (6); a motor (7) is installed on the side wall of the support column (3), the output end of the motor (7) passes through the side wall of the support column (3), and a driving wheel (8) meshing with the driven wheel (6) is installed at the end of the output end of the support column (3).

5. The reverse extrusion die device for hard-to-deform metals according to claim 1, characterized in that: The reverse extrusion die (13) further comprises a sleeve (134), a movable groove (135), a connecting column (136) and a second return spring (137). The sleeve (134) is vertically fixed to the bottom of the extrusion block (133) and is coaxially arranged with the extrusion block (133). The sleeve (134) is hollow and has an opening at the bottom. The sleeve (134) is slidably installed in the movable groove (135) arranged at the bottom of the cavity (131). A connecting column (136) is vertically installed at the bottom of the inner wall of the movable groove (135). The top of the connecting column (136) penetrates into the sleeve (134). The outside of the connecting column (136) is also sleeved with a second return spring (137) for driving the sleeve (134) and the extrusion block (133) to return to their original position.

6. The reverse extrusion die device for hard-to-deform metals according to claim 3, characterized in that: The bottom opening of the mold cavity (131) is provided with a limiting groove (132) which is arranged obliquely upward and smoothly transitions with the top end surface of the pushing mechanism (9).

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