High-precision wear-resistant aluminum rod extrusion die

Abstract

The utility model relates to extrusion die field, and disclose a kind of high-precision wear-resistant aluminium bar extrusion die, including extrusion box, the upper end of extrusion box is fixed with first hydraulic cylinder by external bolt, and the lower end of extrusion box is provided with control box, the inside of control box is fixed with second hydraulic cylinder by external bolt, the inner wall sliding slot of extrusion box is slidably connected with T-shaped block, the power output end of first hydraulic cylinder is provided with extrusion assembly, and extrusion assembly includes upper die holder, and the power output end of first hydraulic cylinder is fixed to upper die holder, and the inside of upper die holder is engaged with fixed block.The utility model is changed fast by fixed block plus limit block plus reset spring's quick-change structure of upper die, single person is quickly completed upper die disassembly, and it is greatly shortened to change mould time;Lower mould is matched with fixed column camber surface by reverse thread clamping block, and two-way synchronous clamping is realized by rotating threaded rod, and it is closely and stably adhered, there is no transverse deviation when extruding, and the concentricity of aluminium bar forming is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of extrusion dies, specifically a high-precision wear-resistant aluminum rod extrusion die. Background Technology

[0002] Aluminum bar extrusion dies are indispensable core tooling in aluminum extrusion production. Their core function is to heat the aluminum bar to 400-500℃ and soften it, then force it through the pre-set cavity channel of the die under the high pressure of the extruder, ultimately forming an aluminum profile with a specific cross-sectional shape that meets design requirements. It is not only a key carrier for "shaping" aluminum, but also guides the uniform flow of the aluminum bar and constrains its formation through precisely designed die holes, cores, and flow guiding structures. Furthermore, it directly determines the dimensional tolerances, surface smoothness, and structural integrity of the extruded profile. From door and window profiles for construction and frame components for industrial equipment to lightweight components in the transportation sector, the forming of various aluminum profiles relies on suitable extrusion dies, serving as the core technological bridge connecting raw aluminum bars and finished profiles.

[0003] Existing patent (CN222626076U) discloses an aluminum rod hot extrusion die, including a base. A support plate is fixedly connected to the upper left and upper right sides of the base. A main body device is fixedly connected to the upper middle of the support plate. A lower die base is fixedly connected to the upper middle of the base. A groove is formed in the middle of the front end of the base, and an ejector device is fixedly connected to the middle of the upper wall of the groove. The ejector device includes a cylinder. The output end of the cylinder passes through the base and the lower die base sequentially and is fixedly connected to a connecting block. The upper end of the connecting block is fixedly connected to the lower die, and the cylinder is fixedly connected to the middle of the upper wall of the groove. This utility model discloses an aluminum rod hot extrusion die, which, through the ejector device and main body device, facilitates material discharge, has strong stability, and effectively solves the problem that aluminum rod hot extrusion dies are easily affected by impact forces, causing the die to shake and affecting material quality. However, in actual use, the upper mold base and the upper mold, as well as the lower mold base and the lower mold, of this device adopt a fixed connection structure that cannot be separated. In actual production, the molds need to be replaced frequently: the hot extrusion of aluminum rods needs to be carried out in a high-temperature environment. The working zone of the mold is subjected to high-temperature friction and extrusion stress for a long time, which can easily lead to wear, thermal fatigue cracking and other problems. This results in scratches on the surface of the aluminum rods and out-of-tolerance dimensional accuracy, which cannot meet the product quality requirements. The molds must be replaced in time. However, when replacing the molds, multiple parts such as the support plate bolts and the ejection device need to be disassembled in sequence. The operation steps are complicated and require the cooperation of multiple people. The whole process is time-consuming. The frequent and cumbersome replacement seriously affects the continuity of production and has a significant impact on the efficiency of mass production. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the above-mentioned comparative device, the mold is fixedly connected, easily damaged and needs to be replaced at high temperatures, but the disassembly process is cumbersome, time-consuming, and frequent replacement affects the continuity of production and greatly reduces the efficiency of mass production.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A high-precision wear-resistant aluminum rod extrusion die includes an extrusion box. A first hydraulic cylinder is fixed to the upper end of the extrusion box by external bolts, and a control box is located at the lower end of the extrusion box. A second hydraulic cylinder is fixed inside the control box by external bolts. A T-shaped block is slidably connected within a groove on the inner wall of the extrusion box. An extrusion assembly is located at the power output end of the first hydraulic cylinder. The extrusion assembly includes an upper die base, which is fixed to the power output end of the first hydraulic cylinder. A fixing block is engaged inside the upper die base. An upper die is welded to the lower end of the fixing block, and a limiting block is engaged within a limiting groove inside the fixing block. A connecting rod is welded to the front side of the limiting block, and a return spring is located on the outer side of the connecting rod. A connecting plate is welded to the other end of the connecting rod.

[0007] As a further embodiment of this utility model: a lower die base is fixed to the lower end face of the extrusion box, and a sliding seat is provided inside the lower die base. A threaded rod is installed on the inner wall of the sliding seat through a bearing, and two sets of clamping blocks are threadedly connected to the surface of the threaded rod. A fixing column is engaged inside the sliding seat, and a fixing plate is welded to the upper end of the fixing column. A lower die is welded to the upper end of the fixing plate.

[0008] As a further embodiment of this utility model: the internal threads of the two sets of clamping blocks are opposite, and a fixing post is clamped between the two sets of clamping blocks, and the contact surface between the clamping block and the fixing post is an arc surface.

[0009] As a further embodiment of this utility model: T-shaped blocks are welded to the left and right sides of the upper mold base, the reset spring is disposed between the limiting block and the inner wall of the upper mold base, and the reset spring is made of high temperature resistant alloy material, and the fixed block has a limiting groove adapted to the limiting block inside.

[0010] As a further embodiment of this utility model: the power output end of the second hydraulic cylinder is fixed with a sliding seat, and the power output end of the second hydraulic cylinder passes through the lower end face of the lower mold base.

[0011] As a further improvement of this utility model: a buffer assembly is provided at the upper end of the lower mold base. The buffer assembly includes a buffer groove, which is opened at the upper end of the lower mold base. A buffer spring is installed inside the buffer groove, and a buffer plate is fixed at the upper end of the buffer spring.

[0012] As a further improvement of this utility model: a buffer column is welded to the lower end of the upper mold base, and the lower end surface of the buffer column is an arc surface.

[0013] As a further improvement of this utility model: the buffer spring is made of high-temperature resistant alloy material, and the buffer plate and the buffer groove form a sliding structure.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model adopts a quick-change structure for the upper mold, which uses a fixed block, a limiting block, and a return spring. Pulling the connecting plate can cause the limiting block to compress the spring and disengage from the limiting groove of the fixed block via the connecting rod. This allows a single person to quickly complete the assembly and disassembly of the upper mold, significantly shortening the mold change time. The lower mold uses a reverse threaded clamping block to cooperate with the arc surface of the fixed column. Rotating the threaded rod achieves bidirectional synchronous clamping, resulting in a tight and stable fit. There is no lateral displacement during extrusion, ensuring the concentricity of the aluminum rod forming. Furthermore, the fixed column and the sliding seat are engaged and positioned, eliminating the need to recalibrate the center when changing the lower mold, further reducing the auxiliary process for mold changing.

[0016] 2. In this utility model, when the upper mold base moves down, the arc-shaped end of the buffer column first contacts the buffer plate to avoid rigid impact and jamming. Then, the buffer spring is compressed to form a gradual buffer, which effectively absorbs the instantaneous impact force of extrusion and reduces the problem of mold collision damage. The buffer spring is made of high temperature resistant alloy material, and the elasticity remains stable under the high temperature environment of hot extrusion, reducing the risk of failure. The buffer plate and the buffer groove slide together to ensure that the buffer direction is vertical and stable, while avoiding the accumulation of high temperature aluminum chips that affect the buffering effect, and significantly extending the overall service life of the mold. Attached Figure Description

[0017] Figure 1 This is a front view of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the upper mold base of this utility model;

[0020] Figure 4 This is a cross-sectional view of the lower mold base of this utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the sliding seat of this utility model;

[0022] Figure 6 This is a schematic diagram of the lower mold structure of this utility model.

[0023] In the diagram: 1. Extrusion box; 2. First hydraulic cylinder; 3. Control box; 4. Second hydraulic cylinder; 5. T-block; 6. Extrusion assembly; 601. Upper die base; 602. Fixing block; 603. Upper die; 604. Limiting block; 605. Connecting rod; 606. Return spring; 607. Connecting plate; 608. Lower die base; 609. Sliding seat; 610. Clamping block; 611. Threaded rod; 612. Fixing column; 613. Fixing plate; 614. Lower die; 7. Buffer assembly; 701. Buffer spring; 702. Buffer plate; 703. Buffer column; 704. Buffer groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figures 1 to 6 As shown, a high-precision wear-resistant aluminum rod extrusion die includes an extrusion box 1. A first hydraulic cylinder 2 is fixed to the upper end of the extrusion box 1 by external bolts, and a control box 3 is located at the lower end of the extrusion box 1. A second hydraulic cylinder 4 is fixed inside the control box 3 by external bolts. A T-shaped block 5 is slidably connected within a groove on the inner wall of the extrusion box 1. An extrusion assembly 6 is located at the power output end of the first hydraulic cylinder 2. The extrusion assembly 6 includes an upper die base 601, which is fixed to the power output end of the first hydraulic cylinder 2. A fixing block 602 is engaged inside the upper die base 601. An upper die 603 is welded to the lower end of the fixing block 602. A limiting block 604 engages in the internal limiting groove of 02. A connecting rod 605 is welded to the front side of the limiting block 604, and a return spring 606 is provided on the outer side of the connecting rod 605. A connecting plate 607 is welded to the other end of the connecting rod 605. Pulling the connecting plate 607 outward causes the connecting plate 607 to move the connecting rod 605 outward. The connecting rod 605 simultaneously causes the limiting block 604 to compress the return spring 606 until the limiting block 604 is completely disengaged from the limiting groove inside the fixing block 602. At this time, the fixing block 602 loses its limiting constraint, and the old upper mold 603 can be removed from the upper mold base 601 along with the fixing block 602.

[0027] Furthermore, a lower die base 608 is fixed to the lower end face of the extrusion box 1, and a sliding seat 609 is provided inside the lower die base 608. A threaded rod 611 is installed on the inner wall of the sliding seat 609 through a bearing, and two sets of clamping blocks 610 are threadedly connected to the surface of the threaded rod 611. A fixing post 612 is engaged inside the sliding seat 609, and a fixing plate 613 is welded to the upper end of the fixing post 612. A lower die 614 is welded to the upper end of the fixing plate 613. When the threaded rod 611 is turned, since the internal threads of the two sets of clamping blocks 610 are opposite, the rotation of the threaded rod 611 will drive the two sets of clamping blocks 610 to move in opposite directions until they are completely disengaged from the clamping of the fixing post 612. Then the old lower die 614 can be removed from the sliding seat 609 together with the fixing plate 613 and the fixing post 612.

[0028] Furthermore, the internal threads of the two sets of clamping blocks 610 are opposite, and a fixed post 612 is clamped between the two sets of clamping blocks 610. The contact surface between the clamping block 610 and the fixed post 612 is an arc surface. The replaced lower mold 614 is inserted into the mounting position of the sliding seat 609 through the fixed post 612 at its lower end, and then the threaded rod 611 is turned in the opposite direction to make the two sets of clamping blocks 610 move relative to each other and re-establish a stable clamping on the fixed post 612.

[0029] Furthermore, T-shaped blocks 5 are welded to the left and right sides of the upper die base 601, and a return spring 606 is set between the limiting block 604 and the inner wall of the upper die base 601. The return spring 606 is made of high-temperature resistant alloy material. The fixed block 602 has a limiting groove inside that matches the limiting block 604. The T-shaped blocks 5 on both sides of the upper die base 601 slide synchronously in the groove on the inner wall of the extrusion box 1, which not only plays a limiting role, but also effectively prevents the upper die base 601 from shaking or shifting during the downward movement, ensuring that the upper die base 601 and the lower die base 608 are accurately aligned.

[0030] Example 2

[0031] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0032] Furthermore, a sliding seat 609 is fixed to the power output end of the second hydraulic cylinder 4, and the power output end of the second hydraulic cylinder 4 passes through the lower end face of the lower mold base 608. When the second hydraulic cylinder 4 is activated, the power output end of the second hydraulic cylinder 4 drives the sliding seat 609 to move upward within the lower mold base 608. The sliding seat 609 then drives the fixing plate 613 and the lower mold 614 to move upward synchronously, so that the formed aluminum rod is separated from the lower mold base 608, making it easy for the operator to remove it.

[0033] Furthermore, a buffer assembly 7 is provided at the upper end of the lower mold base 608. The buffer assembly 7 includes a buffer groove 704, which is opened at the upper end of the lower mold base 608. A buffer spring 701 is installed inside the buffer groove 704. A buffer plate 702 is fixed at the upper end of the buffer spring 701. During the descent of the upper mold base 601, the buffer post 703 at its lower end will first insert into the buffer groove 704 at the upper end of the lower mold base 608 and push the buffer plate 702 to slide down along the buffer groove 704, thereby compressing the buffer spring 701 inside the buffer groove 704.

[0034] Furthermore, a buffer pillar 703 is welded to the lower end of the upper mold base 601, and the lower end surface of the buffer pillar 703 is an arc surface. The arc surface design of the buffer pillar 703 prevents jamming when it is inserted into the buffer groove 704 at the upper end of the lower mold base 608.

[0035] Furthermore, the buffer spring 701 is made of high-temperature resistant alloy material, and the buffer plate 702 and the buffer groove 704 form a sliding structure. The buffer spring 701 absorbs the impact force of the upper mold base 601 moving downward through deformation, so as to avoid rigid collision between the upper mold base 601 and the lower mold base 608 and protect the mold and equipment components.

[0036] Working principle: In use, the aluminum part heated to the preset temperature is first placed on the upper end of the fixed lower mold 614. The first hydraulic cylinder 2 is started through the control box 3. The power output end of the first hydraulic cylinder 2 drives the upper mold base 601 to move vertically downward. The T-shaped blocks 5 on both sides of the upper mold base 601 slide synchronously in the grooves on the inner wall of the extrusion box 1, which not only plays a limiting role, but also effectively prevents the upper mold base 601 from shaking or shifting during the downward movement, ensuring that the upper mold base 601 and the lower mold base 608 are accurately aligned. When the upper mold base 601 drives the lower mold 603 to gradually approach and contact the aluminum part, the extrusion force is applied to the aluminum part, so that the aluminum part gradually fits into the cylindrical cavity formed by the upper mold 603 and the lower mold 614 under the pressure, and the forming is completed. During the descent of the upper mold base 601, the buffer column 703 at its lower end first inserts into the buffer groove 704 at the upper end of the lower mold base 608, and pushes the buffer plate 702 to slide downward along the buffer groove 704, thereby compressing the buffer spring 701 in the buffer groove 704. The buffer spring 701 absorbs the impact force of the upper mold base 601 moving downward through deformation, avoiding a rigid collision between the upper mold base 601 and the lower mold base 608, and protecting the mold and equipment components. After extrusion, the first hydraulic cylinder 2 is controlled to move the upper mold base 601 and the upper mold 603 upward to detach from the aluminum part. Then, the second hydraulic cylinder 4 is activated. The power output end of the second hydraulic cylinder 4 drives the sliding seat 609 to move upward within the lower mold base 608. The sliding seat 609 then drives the fixed plate 613 and the lower mold 614 to move upward synchronously, so that the formed aluminum rod detaches from the lower mold base 608, making it easy for the operator to remove. If the upper mold 603 needs to be replaced, the operator pulls the connecting plate 607 outward. The connecting plate 607 drives the connecting rod 605 to move outward. The connecting rod 605 simultaneously drives the limiting block 604 to compress the return spring 606 until the limiting block 604 is completely disengaged from the limiting groove inside the fixing block 602. At this time, the fixing block 602 loses its limiting constraint. The old upper mold 603 can be taken out from the upper mold base 601 along with the fixing block 602. The replaced upper mold 603 is inserted through the fixing block 602 at its upper end, aligned with the mounting port of the upper mold base 601. Then, the connecting plate 607 is released. Under the action of the elastic force, the return spring 606 pushes the limiting block 604 to move in the opposite direction and re-engages it into the limiting groove inside the fixing block 602, thus completing the quick fixing of the upper mold 603.If the lower mold 614 is to be replaced, first start the second hydraulic cylinder 4 through the control box 3. The second hydraulic cylinder 4 drives the sliding seat 609 to move upward until the sliding seat 609 is completely disengaged from the internal space of the lower mold base 608. At this time, the operator turns the threaded rod 611. Since the internal threads of the two sets of clamping blocks 610 are opposite, the rotation of the threaded rod 611 will drive the two sets of clamping blocks 610 to move in opposite directions until they are completely disengaged from the clamping of the fixing post 612. Then the old lower mold 614 can be taken out from the sliding seat 609 along with the fixing plate 613 and the fixing post 612. Insert the replaced lower mold 614 into the mounting position of the sliding seat 609 through the fixing post 612 at its lower end. Then turn the threaded rod 611 in the opposite direction to make the two sets of clamping blocks 610 move relative to each other and re-clamp the fixing post 612 stably. Finally, the second hydraulic cylinder 4 resets the sliding seat 609 into the lower mold base 608, completing the replacement of the lower mold 614.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-precision wear-resistant aluminum rod extrusion die, comprising an extrusion box (1), characterized in that: The upper end of the extrusion box (1) is fixed with a first hydraulic cylinder (2) by external bolts, and the lower end of the extrusion box (1) is provided with a control box (3). The inside of the control box (3) is fixed with a second hydraulic cylinder (4) by external bolts. A T-shaped block (5) is slidably connected in the inner wall groove of the extrusion box (1). An extrusion assembly (6) is provided at the power output end of the first hydraulic cylinder (2). The extrusion assembly (6) includes an upper die holder (601). The upper die holder (601) is fixed to the first hydraulic cylinder (2). The power output end of the hydraulic cylinder (2) is fitted with a fixing block (602) inside the upper mold base (601). The lower end of the fixing block (602) is welded with an upper mold (603). The internal limiting groove of the fixing block (602) is fitted with a limiting block (604). The front side of the limiting block (604) is welded with a connecting rod (605). The outer side of the connecting rod (605) is provided with a return spring (606). The other end of the connecting rod (605) is welded with a connecting plate (607).

2. The high-precision wear-resistant aluminum rod extrusion die according to claim 1, characterized in that: The lower end face of the extrusion box (1) is fixed with a lower die base (608), and a sliding seat (609) is provided inside the lower die base (608). A threaded rod (611) is installed on the inner wall of the sliding seat (609) through a bearing, and two sets of clamping blocks (610) are threadedly connected to the surface of the threaded rod (611). A fixing column (612) is engaged inside the sliding seat (609), and a fixing plate (613) is welded to the upper end of the fixing column (612). A lower die (614) is welded to the upper end of the fixing plate (613).

3. The high-precision wear-resistant aluminum rod extrusion die according to claim 2, characterized in that: The internal threads of the two sets of clamping blocks (610) are opposite, and a fixing post (612) is clamped between the two sets of clamping blocks (610). The contact surface between the clamping block (610) and the fixing post (612) is an arc surface.

4. The high-precision wear-resistant aluminum rod extrusion die according to claim 1, characterized in that: T-shaped blocks (5) are welded on the left and right sides of the upper mold base (601). The reset spring (606) is located between the limiting block (604) and the inner wall of the upper mold base (601). The reset spring (606) is made of high temperature resistant alloy material. The fixed block (602) has a limiting groove inside that is compatible with the limiting block (604).

5. The high-precision wear-resistant aluminum rod extrusion die according to claim 1, characterized in that: The power output end of the second hydraulic cylinder (4) is fixed with a sliding seat (609), and the power output end of the second hydraulic cylinder (4) passes through the lower end face of the lower mold base (608).

6. The high-precision wear-resistant aluminum rod extrusion die according to claim 5, characterized in that: The upper end of the lower mold base (608) is provided with a buffer assembly (7), the buffer assembly (7) includes a buffer groove (704), the buffer groove (704) is opened at the upper end of the lower mold base (608), and a buffer spring (701) is installed inside the buffer groove (704), and a buffer plate (702) is fixed at the upper end of the buffer spring (701).

7. The high-precision wear-resistant aluminum rod extrusion die according to claim 4, characterized in that: The lower end of the upper mold base (601) is welded with a buffer column (703), and the lower end surface of the buffer column (703) is an arc surface.

8. The high-precision wear-resistant aluminum rod extrusion die according to claim 6, characterized in that: The buffer spring (701) is made of high-temperature resistant alloy material, and the buffer plate (702) and the buffer groove (704) form a sliding structure.

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