A preforming device for two-component annular parts

Abstract

A preforming device for two-component annular parts includes a forming die and a feeding system. The forming die comprises an upper die and a lower die. The components of the lower die sequentially form an outer annular cavity and an inner annular cavity. Two feeding systems are provided, each including a hopper connected to a feed hose at the top and an open bottom. The two feeding systems are positioned on either side of the lower die. The bottom of each hopper is attached to a feeding platform and is translated along the platform by a drive mechanism. The feed hose at the top of one hopper is connected to a source of silicon carbide powder, while the feed hose at the top of the other hopper is connected to a source of aluminum powder. The present invention has a reliable structure and high forming precision, enabling automatic preforming of two-component annular parts, greatly improving production efficiency and quality.

Description

Technical Field

[0001] The invention relates to the field of material forming, in particular to a preforming device for a two-component annular part. Background Art

[0002] Some brake disc manufacturers manufacture brake discs with an aluminum inner ring, serving as a mounting disc for connection to the wheel hub, and a silicon carbide outer ring, serving as a friction disc for contact with the brake pad. Currently, brake discs with this structure typically manufacture the mounting disc and friction disc separately, which are then assembled together using fasteners to create a single unit. This complex production process requires extremely high assembly precision, resulting in a low yield rate for the mounting disc and friction disc, leading to higher production costs. Furthermore, the use of fasteners to connect the mounting disc and friction disc does not effectively guarantee the overall quality of the brake disc.

[0003] Therefore, how to prepare such two-component annular parts efficiently, with high quality and low cost is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a preforming device for two-component ring parts, which has a reliable structure and high forming precision, can realize automatic preforming of two-component ring parts, and greatly improves production efficiency and production quality.

[0005] The technical solution of the present invention is: a preforming device for a two-component annular part, comprising a forming mold and a feeding system, wherein the forming mold comprises an upper mold and a lower mold, wherein the lower mold comprises an outer mold sleeve, a first support sleeve, a second support sleeve, and a mold core that can independently move up and down, and a feeding platform is fixedly provided on the outer peripheral side wall of the outer mold sleeve, flush with the upper end surface of the outer mold sleeve, the first support sleeve slides in the inner cavity of the outer mold sleeve, the second support sleeve slides in the inner cavity of the first support sleeve, and the mold core slides in the inner cavity of the second support sleeve, and the upper mold comprises a first pressure ring and a second pressure ring that can independently move up and down, The second pressure ring slides in the inner cavity of the first pressure ring, and the first pressure ring corresponds to the first support sleeve, and the second pressure ring corresponds to the second support sleeve. There are two feeding systems, and the feeding system includes a hopper. The top of the hopper is connected to the feeding hose, and the bottom of the hopper is open. The two feeding systems are respectively arranged on both sides of the lower mold. The bottom of the hopper of each feeding system is attached to the feeding platform, and is translated along the feeding platform by a driving mechanism. The feeding hose on the top of one hopper is used to be connected to a silicon carbide powder source, and the feeding hose on the top of the other hopper is used to be connected to an aluminum powder source.

[0006] The first pressure ring is fixed under a pressure plate and has a spacing space. The length of the second pressure ring is the same as that of the first pressure ring. It also includes a limiting pad that slides horizontally in the spacing space between the first pressure ring and the pressure plate.

[0007] The limiting pad is driven by a hydraulic cylinder to move in a horizontal direction. The lower end opening of the second pressure ring forms a clearance hole of the mold core. The second pressure ring is provided with an air release hole communicating with the interval space.

[0008] The driving mechanism includes a translation platform, a connecting arm, and a clamping telescopic cylinder. The translation platform is driven by a hydraulic cylinder to move in the horizontal direction. One end of the connecting arm is hinged to the hopper, and the other end is hinged to the translation platform. The cylinder body of the clamping telescopic cylinder is hinged to the translation platform and is located above the connecting arm. The piston rod of the clamping telescopic cylinder is hinged to the connecting arm.

[0009] The feeding system also includes a material barrel and a material barrel lifting device. The upstream end of the feed hose is provided with a material receiving port, and a thimble is provided in the material receiving port. The barrel mouth of the material barrel is a conical structure and is adapted to the material receiving port. A pressure block is provided in the material barrel and is pressed against the barrel mouth by a compression spring to form a closure. The material barrel lifting device includes a guide rail and a lifting platform slidingly fitted on the guide rail. A rotating platform is hingedly provided on the lifting platform. The rotating platform rotates around a horizontal axis and is driven by a hydraulic cylinder to rotate around a vertical line. A clamp is provided on the rotating platform for clamping the material barrel.

[0010] A push pin is provided in the middle of the pressing block and corresponds to the push pin in the material receiving port.

[0011] The lifting platform is driven to move up and down by a screw-nut transmission mechanism, and the rotating platform is driven to rotate around a horizontal axis by a worm-gear transmission mechanism.

[0012] The above technical solution has the following beneficial effects:

[0013] 1. The preforming device of the two-component annular part includes a forming mold and a feeding system. The forming mold includes an upper mold and a lower mold. The lower mold includes an outer mold sleeve that can move up and down independently, a first support sleeve, a second support sleeve, and a mold core. A feeding platform is fixedly provided on the outer peripheral side wall of the outer mold sleeve, flush with the upper end face of the outer mold sleeve, that is, the feeding platform remains flush with the upper end face of the outer mold sleeve and moves up and down with the outer mold sleeve. The first support sleeve slides in the inner cavity of the outer mold sleeve, the second support sleeve slides in the inner cavity of the first support sleeve, and the mold core slides in the inner cavity of the second support sleeve. Through the coordinated action of the various components of the lower mold, different annular cavities can be formed on the upper end face of the lower mold to meet the production task. The upper die includes a first pressure ring and a second pressure ring that can move up and down independently. The second pressure ring slides and fits in the inner cavity of the first pressure ring, and the first pressure ring corresponds to the first support sleeve, and the second pressure ring corresponds to the second support sleeve. The first pressure ring and the second pressure ring can move independently. By coordinating with the various components of the lower die, they can be used to press the powder material in the annular cavity formed on the upper end face of the lower die to obtain the corresponding two-component annular rough product. There are two feeding systems, which respectively transport the inner ring material and the outer ring material of the two-component annular part. The feeding system includes a hopper, the top of which is connected to a feeding hose, and the bottom of the hopper is open. The two feeding systems are respectively arranged on both sides of the lower die. The bottom of the hopper of each feeding system is attached to the feeding platform and is translated along the feeding platform by a driving mechanism. The feeding hose at the top of one hopper is used to connect to a silicon carbide powder source, and the feeding hose at the top of the other hopper is used to connect to an aluminum powder source, so that one hopper is filled with silicon carbide powder and the other hopper is filled with aluminum powder, forming a two-component annular part on the upper end face of the lower die. After the outer ring cavity of the two-component annular part is formed, the feeding system filled with silicon carbide powder is driven to move horizontally in alignment with the feeding platform until the bottom opening of the feeding system's hopper is opened to cover the outer ring cavity. The silicon carbide powder fills the outer ring cavity under the action of gravity. The feeding system is then reset and the material is scraped from the outer ring cavity to ensure that the silicon carbide powder filled in the outer ring cavity is full and flush with the upper end face of the lower die, avoiding spillage during the extrusion process. Similarly, another feeding system is used to fill the inner ring cavity of the two-component annular part formed on the upper end face of the lower die with aluminum powder. In this way, automated feeding is achieved with high feeding efficiency and safety, which can effectively reduce manual labor intensity and ensure production safety and quality.

[0014] 2. The first pressure ring is fixed below a pressure plate and has a spacing space. The length of the second pressure ring is the same as that of the first pressure ring. It also includes a limiting pad, which slides horizontally in the spacing space between the first pressure ring and the pressure plate. When the first pressure ring is used to extrude the silicon carbide powder in the outer ring cavity, the pressure plate is controlled to move downward, driving the first pressure ring to apply force downward. When squeezing the aluminum powder in the inner ring cavity, the second pressure ring is required to extrude the aluminum powder downward, and at the same time, the first pressure ring is required to continue to extrude the preformed silicon carbide outer ring downward. By driving the limiting pad horizontally to the spacing space between the first pressure ring, the second pressure ring and the pressure plate, the purpose of synchronously driving the first pressure ring and the second pressure ring to move downward can be achieved. The entire structure is simple and reliable.

[0015] 3. The driving mechanism includes a translation platform, a connecting arm, and a compacting telescopic cylinder. The translation platform is driven by a hydraulic cylinder to move in the horizontal direction. One end of the connecting arm is hinged to the hopper, and the other end is hinged to the translation platform. The cylinder body of the compacting telescopic cylinder is hinged to the translation platform and is located above the connecting arm. The piston rod of the compacting telescopic cylinder is hinged to the connecting arm. Such a connection ensures that the hopper always remains in close contact with the feeding platform during the translation process along the feeding platform, thereby preventing the powder in the hopper from leaking out, thereby ensuring production safety and product quality.

[0016] 4. The feeding system also includes a material barrel and a material barrel lifting device. The upstream end of the feed hose is provided with a material receiving port, and a thimble is provided in the material receiving port. The barrel mouth of the material barrel is a conical structure and is adapted to the material receiving port. A pressure block is provided in the material barrel and is pressed against the barrel mouth by a compression spring to form a closure. The powder is filled in the corresponding material barrel and sealed by the pressure block. The material barrel lifting device includes a guide rail and a lifting platform slidingly fitted on the guide rail, and a rotating platform is hingedly arranged on the lifting platform, which rotates around a horizontal axis and is driven by a hydraulic cylinder to rotate around a gravity vertical line. A clamp is provided on the rotating platform for clamping the material barrel, and the material barrel loaded with powder raw materials is clamped on the clamp and lifted to a specified position (higher than the material receiving port of the feed hose) by the material barrel lifting device, and rotated 90° around the gravity vertical line and located above the material receiving port. Then the material barrel is rotated 180° around the horizontal axis so that the barrel mouth faces downward, and the lifting platform moves downward so that the barrel mouth of the material barrel is inserted into the material receiving port of the feed hose, and the pressure block at the barrel mouth of the material barrel is pushed open by a pin, so that the loaded powder automatically enters the corresponding hopper along the feed hose under the action of gravity, realizing fully automatic loading, high feeding efficiency and safety, which can effectively reduce manual labor intensity and ensure production safety and production quality.

[0017] The following is a further description with reference to the accompanying drawings and specific implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the upper mold of the present invention;

[0020] Figure 3 This is a schematic diagram of the coordination of the bucket lifting device of the present invention;

[0021] Figure 4 for Figure 3 Top view of .

[0022] In the accompanying drawings, 1 is a forming mold, 2 is a feeding system, 3 is an upper mold, 4 is a lower mold, 5 is an outer mold sleeve, 6 is a first support sleeve, 7 is a second support sleeve, 8 is a mold core, 9 is a feeding platform, 10 is a first pressure ring, 11 is a second pressure ring, 12 is a hopper, 13 is a feed hose, 14 is a pressure plate, 15 is a limit pad, 16 is a translation platform, 17 is a connecting arm, 18 is a clamping telescopic cylinder, 19 is a barrel, 20 is a barrel lifting device, 21 is a material receiving port, 22 is a ejector pin, 23 is a pressure block, 24 is a guide rail, 25 is a lifting platform, 26 is a rotating platform, 27 is a clamp, and 28 is a top head. DETAILED DESCRIPTION

[0023] Example 1

[0024] See also Figures 1 to 4The preforming device for a two-component annular part includes a forming mold 1 and a feeding system 2. The forming mold 1 includes an upper mold 3 and a lower mold 4. The lower mold 4 includes an outer mold sleeve 5, a first support sleeve 6, a second support sleeve 7, and a mold core 8, which can move up and down independently. A feeding platform 9 is fixedly provided on the outer peripheral side wall of the outer mold sleeve 5 and is flush with the upper end surface of the outer mold sleeve 5. The first support sleeve 6 slides in the inner cavity of the outer mold sleeve 5, the second support sleeve 7 slides in the inner cavity of the first support sleeve 6, and the mold core 8 slides in the inner cavity of the second support sleeve 7. The upper die 3 includes a first pressure ring 10 and a second pressure ring 11 that can move up and down independently. The second pressure ring 11 is slidably fitted in the inner cavity of the first pressure ring 10, and the first pressure ring 10 corresponds to the first support sleeve 6, and the second pressure ring 11 corresponds to the second support sleeve 7. In this embodiment, the first pressure ring 10 is fixed below a pressure plate 14 (the pressure plate is driven up and down by a telescopic cylinder) and has a spacing space. The length of the second pressure ring 11 is the same as that of the first pressure ring 10. The second pressure ring is limited downward by a step to ensure The lower end face of the second pressure ring is kept flush with the lower end face of the first pressure ring, and also includes a limit pad 15, which slides in the horizontal direction in the interval space between the first pressure ring 10 and the pressure plate 14. By controlling the position of the limit pad, the upper end faces of the first pressure ring and the second pressure ring are misaligned or flush. Specifically, the limit pad 15 is driven by a hydraulic cylinder to move in the horizontal direction, and the lower end opening of the second pressure ring 11 forms a makeshift hole of the mold core, and the second pressure ring 11 is provided with an air vent connected to the interval space. The number of the feeding system 2 is two, and the feeding system 2 includes a hopper 12. The top of the hopper 12 is connected to the feeding hose 13, and the bottom of the hopper 12 is open. In this embodiment, the feeding system 2 also includes a barrel 19 and a barrel lifting device 20. The upstream end of the feeding hose 13 is provided with a material receiving port 21, and a ejector pin 22 is provided in the material receiving port 21. The barrel mouth of the barrel 19 is a conical structure and is adapted to the material receiving port 21. A pressure block 23 is provided in the barrel 19 and is pressed against the barrel mouth by a compression spring to form a closure. A ejector pin 28 is provided in the middle of the pressure block 23. , corresponding to the ejector pin 22 in the material receiving port, the barrel lifting device 20 includes a guide rail 24 and a lifting platform 25 that slides on the guide rail 24. Specifically, the lifting platform 25 is driven up and down by a screw-nut transmission mechanism. A rotating platform 26 is hingedly provided on the lifting platform 25, and the rotating platform 26 rotates about a horizontal axis. Specifically, the rotating platform 26 is driven to rotate about the horizontal axis by a worm-wheel transmission mechanism, and the rotating platform is driven to rotate about a vertical line by a hydraulic cylinder. A clamp 27 is provided on the rotating platform 26 for clamping the barrel 19. Two feeding systems 2 are respectively arranged on both sides of the lower mold 4, one of which is loaded with silicon carbide powder in the barrel, and the other is loaded with aluminum powder in the barrel.The bottom of the hopper 12 of each feeding system 2 is attached to the feeding platform 9, and is translated along the feeding platform by a driving mechanism. In this embodiment, the driving mechanism includes a translation platform 16, a connecting arm 17, and a clamping telescopic cylinder 18. The translation platform 16 is driven by a hydraulic cylinder to move in the horizontal direction. One end of the connecting arm 17 is hinged to the hopper 12, and the other end is hinged to the translation platform 16. The cylinder body of the clamping telescopic cylinder 18 is hinged to the translation platform 16 and is located above the connecting arm 17. The piston rod of the clamping telescopic cylinder 18 is hinged to the connecting arm 17.

[0025] Example 2

[0026] The two-component annular part is preformed using the preforming device of the two-component annular part of Example 1. For example, the outer ring is made of silicon carbide and the inner ring is made of aluminum. The preforming steps include:

[0027] 1) When the supporting equipment is in the initial state, the upper end surfaces of the outer mold sleeve, the first support sleeve, the second support sleeve, and the mold core of the lower mold are located on the first reference plane, and the lower end surfaces of the first pressure ring and the second pressure ring are located on the second reference plane. Obviously, the first reference plane is located below the second reference plane;

[0028] 2) The lower mold moves to form an outer ring molding cavity of the two-component annular part between the outer mold sleeve, the first support sleeve, and the second support sleeve. Specifically, the first support sleeve of the lower mold remains in place, and the outer mold sleeve, the second support sleeve, and the mold core of the lower mold move upward by the same distance to form an outer ring molding cavity of the two-component annular part between the outer mold sleeve, the first support sleeve, and the second support sleeve;

[0029] 3) The barrel loaded with silicon carbide powder is clamped on the clamping hoop of the feeding system on the corresponding side (the left side in this application), and is lifted to the specified position (higher than the material receiving port of the feed hose) by the barrel lifting device, and rotated 90° around the vertical line of gravity and transferred to the top of the material receiving port. Then, the barrel is rotated 180° around the horizontal axis so that the barrel mouth faces downward, and the lifting platform moves downward so that the barrel mouth of the barrel is inserted into the material receiving port of the feed hose, and the pressure block at the barrel mouth of the barrel is pushed open by the ejector pin, so that the loaded silicon carbide powder automatically enters the corresponding hopper along the feed hose under the action of gravity, realizing fully automatic loading;

[0030] 4) The hopper on the left side is aligned with the feeding platform and moves horizontally to the right until the bottom of the hopper is open and covers the outer ring cavity. The silicon carbide powder fills the outer ring cavity under the action of gravity. Then the feeding system is reset and the outer ring cavity is scraped to ensure that the silicon carbide powder filled in the outer ring cavity is full and flush with the upper end surface of the lower die to avoid spillage during the extrusion process;

[0031] 5) The upper die moves to cause the first pressure ring to pre-extrude the silicon carbide powder material downward to obtain the outer ring of the two-component annular part;

[0032] 6) The upper mold is reset and the lower mold is moved to form an inner ring molding cavity of the two-component annular part between the outer ring, the second support sleeve, and the mold core. Specifically, the first support sleeve of the lower mold is first moved upward so that the upper end surface of the outer ring of the two-component annular part obtained in step 5) is flush with the upper end surface of the outer mold sleeve of the lower mold. The second support sleeve of the lower mold is moved downward to the first reference surface;

[0033] 7) The barrel loaded with aluminum powder is clamped on the clamping hoop of the feeding system on the corresponding side (the right side in this application), and is lifted to the specified position (higher than the receiving port of the feed hose) by the barrel lifting device, and rotated 90° around the vertical line of gravity and transferred to the top of the receiving port. Then the barrel is rotated 180° around the horizontal axis so that the barrel mouth faces downward, and the lifting platform moves downward so that the barrel mouth of the barrel is inserted into the receiving port of the feed hose. The pressure block at the barrel mouth of the barrel is pushed open by the ejector pin, so that the loaded aluminum powder automatically enters the corresponding hopper along the feed hose under the action of gravity, realizing fully automatic loading;

[0034] 8) The hopper on the right side fits the feeding platform and moves horizontally to the left until the bottom of the hopper is open and covers the inner ring cavity. The aluminum powder fills the inner ring cavity under the action of gravity. Then the feeding system is reset and the inner ring cavity is scraped to ensure that the aluminum powder filled in the inner ring cavity is full and flush with the upper end surface of the lower die to avoid spillage during the extrusion process.

[0035] 9) driving the limiting pad to move horizontally to the space between the first pressing ring, the second pressing ring, and the pressing plate, so that the first pressing ring and the second pressing ring simultaneously press the outer ring and the inner ring powder material downward to obtain an integral two-component annular part. During the extrusion process, the first support sleeve of the lower die moves downward until it is flush with the upper end surface of the second support sleeve, that is, the first support sleeve moves downward to the first reference surface;

[0036] 10) After extrusion is completed, the upper mold maintains the downward pressure, and the outer mold sleeve and mold core of the lower mold move downward until the upper end surface is flush with the upper end surfaces of the first support sleeve and the second support sleeve, that is, it moves downward to the first reference surface, and the upper mold is reset to remove the part.

Claims

1. A preforming device for a two-component annular part, characterized in that: It includes a forming mold (1), a feeding system (2), The molding die (1) comprises an upper die (3) and a lower die (4). The lower mold (4) comprises an outer mold sleeve (5) that can move up and down independently, a first support sleeve (6), a second support sleeve (7), and a mold core (8). A feeding platform (9) is fixedly provided on the outer peripheral side wall of the outer mold sleeve (5) and is flush with the upper end surface of the outer mold sleeve (5). The first support sleeve (6) is slidably fitted in the inner cavity of the outer mold sleeve (5), the second support sleeve (7) is slidably fitted in the inner cavity of the first support sleeve (6), and the mold core (8) is slidably fitted in the inner cavity of the second support sleeve (7). The upper mold (3) includes a first pressure ring (10) and a second pressure ring (11) that can move up and down independently. The first pressure ring (10) is fixed below a pressure plate (14) and has a spacing space. The length of the second pressure ring (11) is the same as that of the first pressure ring (10). The upper mold (3) also includes a limiting pad (15). The limiting pad (15) slides in the horizontal direction in the spacing space between the first pressure ring (10) and the pressure plate (14). The limiting pad (15) is driven by a hydraulic cylinder to move in the horizontal direction. The lower end opening of the second pressure ring (11) forms a clearance hole of the mold core. The second pressure ring (11) is provided with an air vent connected to the spacing space. The second pressure ring (11) is slidably fitted in the inner cavity of the first pressure ring (10), and the first pressure ring (10) corresponds to the first support sleeve (6), and the second pressure ring (11) corresponds to the second support sleeve (7). The number of the feeding systems (2) is two, and the feeding system (2) includes a hopper (12). The top of the hopper (12) is connected to the feeding hose (13), and the bottom of the hopper (12) is open. Two feeding systems (2) are respectively arranged on both sides of the lower mold (4), and the bottom of the hopper (12) of each feeding system (2) is attached to the feeding platform (9) and is translated along the feeding platform by a driving mechanism. The feeding hose on the top of one hopper is used to be connected to the silicon carbide powder source, and the feeding hose on the top of the other hopper is used to be connected to the aluminum powder source. The driving mechanism includes a translation platform (16), a connecting arm (17), and a compacting telescopic cylinder (18). The translation platform (16) is driven by a hydraulic cylinder to move in a horizontal direction. One end of the connecting arm (17) is hinged to the hopper (12), and the other end is hinged to the translation platform (16). The cylinder body of the compacting telescopic cylinder (18) is hinged to the translation platform (16) and is located above the connecting arm (17). The piston rod of the compacting telescopic cylinder (18) is hinged to the connecting arm (17).

2. The preforming device for a two-component annular part according to claim 1, characterized in that: The feeding system (2) further includes a material barrel (19) and a material barrel lifting device (20). The upstream end of the feeding hose (13) is provided with a material receiving port (21), and a ejector pin (22) is provided in the material receiving port (21). The barrel opening of the material barrel (19) is of a conical structure and is adapted to the material receiving opening (21). A pressing block (23) is provided in the material barrel (19) and is pressed against the barrel opening by a compression spring to form a seal. The material barrel lifting device (20) includes a guide rail (24) and a lifting platform (25) slidingly engaged with the guide rail (24). A rotating platform (26) is hingedly provided on the lifting platform (25). The rotating platform (26) rotates around a horizontal axis and is driven by a hydraulic cylinder to rotate around a vertical line. A clamp (27) is provided on the rotating platform (26) for clamping the material barrel (19).

3. The preforming device for a two-component annular part according to claim 2, characterized in that: A plug (28) is provided in the middle of the pressing block (23), corresponding to the ejector pin (22) in the material receiving port.

4. The preforming device for a two-component annular part according to claim 2, characterized in that: The lifting platform (25) is driven to move up and down by a screw-nut transmission mechanism, and the rotating platform (26) is driven to rotate around a horizontal axis by a worm-gear transmission mechanism.

Images