An automated production system and method for two-component ring parts

Abstract

An automated production system for two-component ring-shaped parts includes a preforming device, a final forming device, and a continuous sintering furnace. The preforming device is located in front of the kiln head of the continuous sintering furnace, and a first transfer robot transfers the preformed blanks to the kiln head. The final forming device is located behind the kiln tail of the continuous sintering furnace, and a second transfer robot transfers the sintered blanks to the final forming device. This invention features a reliable structure, high forming accuracy, and can achieve automated production of two-component ring-shaped parts, greatly improving production efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of material forming, and in particular to an automated production system and method for two-component ring parts. Background Technology

[0002] Some brake disc manufacturers produce inner rings made of aluminum, serving as the mounting frame, with an annular step welded to the center for connection to the wheel hub. The outer ring is made of silicon carbide, serving as the friction disc for contact with the brake pads. Currently, brake discs with this structure typically have the inner and outer rings manufactured separately, then the annular step welded on, and finally the outer ring (friction disc) and inner ring (mounting frame) assembled into a single unit using fasteners. This manufacturing process is complex and requires extremely high assembly precision, resulting in a low yield rate and high production costs for the brake discs. Furthermore, using fasteners to connect the mounting frame and friction disc does not effectively guarantee the overall quality of the brake disc.

[0003] Therefore, how to efficiently, with high quality and low cost prepare such two-component ring-shaped parts is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One of the objectives of this invention is to address the shortcomings of existing technologies by providing an automated production system for two-component ring parts. This system has a reliable structure, high molding precision, and can achieve automated production of two-component ring parts, thereby greatly improving production efficiency and quality.

[0005] The second objective of this invention is to provide an automated production method for bicomponent ring parts, which has simple and efficient processing steps and is suitable for large-scale industrial production of bicomponent ring parts.

[0006] One of the technical solutions to achieve the objective of this invention is: an automatic production system for a two-component ring-shaped part, comprising a preforming device, a final forming device, and a continuous sintering furnace. The preforming device includes an upper preforming mold, a lower preforming mold, and a feeding system. The lower preforming mold includes a first outer mold sleeve, a first support sleeve, a second support sleeve, and a mold core, all capable of independent up-and-down movement. A feeding platform is fixedly arranged on the outer peripheral sidewall of the first outer mold sleeve, flush with the upper end face of the first outer mold sleeve. The first support sleeve slides into the inner cavity of the first outer mold sleeve, the second support sleeve slides into the inner cavity of the first support sleeve, and the mold core slides into the inner cavity of the second support sleeve. The upper preforming mold includes a first pressure ring and a second pressure ring, both capable of independent up-and-down movement. The second pressure ring slides within the cavity of the first pressure ring, and the first pressure ring corresponds to the first support sleeve, while the second pressure ring corresponds to the second support sleeve. There are two feeding systems, each including a hopper. The top of the hopper is connected to a feeding hose, and the bottom of the hopper is open. The two feeding systems are respectively located on both sides of the pre-forming lower mold. The bottom of the hopper of each feeding system is attached to the feeding platform and is translated along the feeding platform via a drive mechanism. The feeding hose at the top of one hopper is used to connect to the outer ring powder material source, and the feeding hose at the top of the other hopper is used to connect to the inner ring powder material source. The final forming device includes a final forming lower mold, a final forming upper mold, and an ejection mechanism. The final forming lower mold... The system includes a second outer mold sleeve, a third support sleeve, and a fourth support sleeve. The third support sleeve slides within the cavity of the second outer mold sleeve, with its upper end not exceeding the second outer mold sleeve. The fourth support sleeve slides within the cavity of the third support sleeve, and the height difference between the fourth support sleeve and the third support sleeve is adapted to the thickness of the annular step of the bicomponent annular component. The inner diameter of the second outer mold sleeve is adapted to the outer diameter of the bicomponent annular blank. The radial thickness of the third support sleeve is greater than the radial thickness of the outer ring of the bicomponent annular blank but less than the radial thickness of the bicomponent annular blank. The inner diameter of the fourth support sleeve is less than the inner diameter of the inner ring of the bicomponent annular blank. The final forming upper mold includes independently operating third and fourth pressure rings. The fourth pressure ring is slidably fitted into the inner cavity of the third pressure ring. A downwardly extending shaping punch is fixedly installed in the middle of the fourth pressure ring. The shaping punch is adapted to the inner diameter of the fourth support sleeve. The outer diameter of the third pressure ring is adapted to the inner diameter of the second outer mold sleeve. The projection of the third pressure ring is located within the annular range of the top surface of the fourth support sleeve. The ejection mechanism is located below the third support sleeve and drives the third support sleeve to move upward. The preforming device is located in front of the kiln head of the continuous sintering furnace and transfers the preformed billet to the kiln head of the continuous sintering furnace through the first transfer robot. The final forming device is located behind the kiln tail of the continuous sintering furnace and transfers the sintered billet to the final forming device through the second transfer robot.

[0007] The first pressure ring is fixed below a pressure plate and has a gap space. The second pressure ring has the same length as the first pressure ring. It also includes a limiting pad, which slides horizontally in the gap space between the first pressure ring and the pressure plate.

[0008] The driving mechanism includes a translation platform, a connecting arm, and a pressing 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 pressing telescopic cylinder is hinged to the translation platform and located above the connecting arm. The piston rod of the pressing telescopic cylinder is hinged to the connecting arm.

[0009] The feeding system also includes a material bucket and a material bucket lifting device. The upstream end of the feeding hose is provided with a receiving port, and a pin is provided in the receiving port. The opening of the material bucket is conical and adapted to the receiving port. A pressure block is provided in the material bucket and is pressed against the opening by a compression spring to form a seal. The material bucket lifting device includes a guide rail and a lifting platform that is slidably fitted on the guide rail. A rotating platform is hinged 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 bucket.

[0010] The top of the third and fourth pressure rings are respectively provided with heat insulation plates, and the bottom of the second outer mold sleeve, the third support sleeve and the fourth support sleeve are respectively provided with heat insulation plates. The outer side of the third pressure ring is provided with a first heat insulation cavity, and the outer side of the second outer mold sleeve is provided with a second heat insulation cavity. The first heat insulation cavity is arranged around the outer circumferential surface of the third pressure ring, and the second heat insulation cavity is arranged around the outer circumferential surface of the second outer mold sleeve.

[0011] The second technical solution to achieve the objective of this invention is: a method for producing two-component ring parts using any of the above-mentioned automated production systems, comprising the following steps:

[0012] 1) The preforming lower mold moves to form an outer ring forming cavity for a two-component annular blank between the first outer mold sleeve, the first support sleeve, and the second support sleeve, and outer ring powder material is added into the outer ring forming cavity;

[0013] 2) The preforming upper die moves to cause the first pressure ring to pre-extract the powder material downwards to obtain the outer ring of the two-component annular blank;

[0014] 3) The upper preform die is reset and the lower preform die is moved, so that the inner ring forming cavity of the two-component annular blank is formed between the outer ring, the second support sleeve and the mold core, and the inner ring powder material is added into the inner ring forming cavity.

[0015] 4) The preforming upper die operates, causing the first and second pressing rings to simultaneously press the outer and inner ring powder materials downwards, resulting in a two-component annular preform.

[0016] 5) The preformed upper mold is reset, and the first transfer robot is used to transfer the two-component annular billet to the kiln head of the continuous sintering furnace, and the two-component annular billet is heated to 500-600℃.

[0017] 6) The sintered bicomponent annular billet is transferred to the inner cavity of the second outer mold sleeve at the kiln tail of the continuous sintering furnace using the second transfer robot, and supported on the third support sleeve.

[0018] 7) Control the final forming upper die to move downwards, so that the forming punch passes through the inner hole of the two-component annular blank and inserts into the inner cavity of the fourth support sleeve;

[0019] 8) The final forming upper die continues to move downwards, so that the third pressure ring presses against the upper surface of the two-component annular blank and the fourth pressure ring presses against the upper surface of the two-component annular blank.

[0020] 9) The fourth pressure ring of the final forming upper die continues to move downward, extruding the inner ring of the two-component annular blank downward to form an annular step;

[0021] 10) After the extrusion molding is completed, the final molding upper mold is reset, the ejection mechanism is activated, and the third support sleeve is driven to move upward, so that the two-component ring product can be obtained.

[0022] Step 1) Before the preforming lower mold moves, the upper surfaces of the first outer mold sleeve, the first support sleeve, the second support sleeve, and the mold core are located on the first reference surface. By moving the first outer mold sleeve and the second support sleeve upward, an outer ring forming cavity for a two-component annular blank is formed between the first outer mold sleeve, the first support sleeve, and the second support sleeve. Step 2) Before the preforming upper mold moves, the lower surfaces of the first pressure ring and the second pressure ring are located on the second reference surface.

[0023] Step 3) The first support sleeve of the preforming lower die moves upward, so that the upper end face of the outer ring of the two-component annular blank obtained in step 2) is flush with the upper end face of the first outer die sleeve. Step 4) During the extrusion process, the first support sleeve moves downward until it is flush with the upper end face of the second support sleeve. Step 5) Before the preforming upper die is reset, the preforming upper die maintains downward pressure, and the first outer die sleeve and the die core move downward until their upper end faces are flush with the upper end faces of the first support sleeve and the second support sleeve.

[0024] Step 9) The fourth pressure ring moves until the bottom surface of the fourth pressure ring is below the top surface of the third support ring.

[0025] Step 10) Move the third support sleeve upwards until it is flush with the top surface of the second outer mold sleeve.

[0026] The above technical solution has the following beneficial effects:

[0027] 1. This invention utilizes a preforming device to process a two-component annular blank with inner and outer rings located on the same plane. Then, by sintering to eliminate internal stress and soften the outer ring, a final forming device is used to process the two-component annular product with the target structure. The entire production process can be automated and unmanned, greatly improving production efficiency and effectively ensuring product quality.

[0028] 2. The preforming device of the present invention includes a preforming upper mold, a preforming lower mold, and a feeding system. The preforming lower mold includes a first outer mold sleeve, a first support sleeve, a second support sleeve, and a mold core, all of which can move up and down independently. A feeding platform is fixedly provided on the outer peripheral sidewall of the first outer mold sleeve, flush with the upper end face of the first 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 into the inner cavity of the first outer mold sleeve, the second support sleeve slides into the inner cavity of the first support sleeve, and the mold core slides into the inner cavity of the second support sleeve. Through the coordinated operation of the various components of the preforming lower mold, different annular cavities can be formed on the upper end face of the preforming lower mold to meet production requirements. The preforming upper mold includes a first pressing ring and a second pressing ring that can move independently up and down. The second pressing ring slides into the inner cavity of the first pressing ring, and the first pressing ring corresponds to the first support sleeve, and the second pressing ring corresponds to the second support sleeve. Both the first and second pressing rings can move independently. By cooperating with the components of the preforming lower mold, they can be used to press the powder material in the annular cavity formed on the upper surface of the preforming lower mold to obtain the corresponding two-component annular blank. There are two feeding systems, each including a hopper. The top of the hopper is connected to a feeding hose, and the bottom of the hopper is open. The two feeding systems are respectively set on both sides of the preforming 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 drive mechanism. The feeding hose at the top of one hopper is used to connect to the outer ring powder material source, and the feeding hose at the top of the other hopper is used to connect to the inner ring powder material source, so that one hopper is filled with the inner ring powder material and the other hopper is filled with the outer ring powder material. When the upper surface of the preforming lower mold... After the outer ring cavity of the two-component annular preform is formed, a feeding system filled with outer ring powder material is driven to move along the feeding platform until the bottom opening of the feeding system's hopper covers the outer ring cavity. The outer ring powder material fills the outer ring cavity under gravity. The feeding system then resets and scrapes the outer ring cavity to ensure the outer ring powder material is fully incorporated and flush with the upper surface of the preforming die, preventing spillage during extrusion. Similarly, another feeding system fills the inner ring cavity of the two-component annular preform formed on the upper surface of the preforming die with inner ring powder material. This achieves automated feeding, high efficiency, and safety, effectively reducing manual labor intensity while ensuring production safety and quality.

[0029] 3. The first pressure ring of the preforming device of the present invention is fixed below a pressure plate and has a gap space. The length of the second pressure ring is the same as the length of the first pressure ring. It also includes a limiting pad, which slides horizontally in the gap space between the first pressure ring and the pressure plate. When the first pressure ring is used to squeeze the outer ring powder material in the outer ring cavity, the pressure plate is controlled to move downward, driving the first pressure ring to apply downward force. When squeezing the inner ring powder material in the inner ring cavity, the second pressure ring needs to squeeze the inner ring powder material downward, and at the same time, the first pressure ring needs to continue to squeeze the preformed outer ring downward. By driving the limiting pad to move horizontally to the gap 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 whole structure is simple and reliable.

[0030] 4. The driving mechanism of the preforming device of the present invention includes a translation platform, a connecting arm, and a pressing telescopic cylinder. The translation platform is driven by a hydraulic cylinder to move horizontally. 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 pressing telescopic cylinder is hinged to the translation platform and located above the connecting arm. The piston rod of the pressing telescopic cylinder is hinged to the connecting arm. This connection ensures that the hopper remains in close contact with the feeding platform during the translation process along the feeding platform, preventing the powder in the hopper from leaking out and ensuring production safety and product quality.

[0031] 5. The feeding system of the preforming device of the present invention also includes a material barrel and a material barrel lifting device. The upstream end of the feeding hose is provided with a receiving port, and a pin is provided in the receiving port. The barrel opening is conical and adapted to the receiving port. A pressure block is provided in the barrel and is pressed into the barrel opening by a compression spring to form a seal. Powder is filled into the corresponding material barrel and sealed by the pressure block. The material bucket lifting device includes a guide rail and a lifting platform slidably fitted on the guide rail. A rotating platform is hinged to the lifting platform and rotates around a horizontal axis. The rotating platform is driven by a hydraulic cylinder to rotate around a vertical line. A clamp is installed on the rotating platform to clamp the material bucket. The material bucket loaded with powder raw materials is clamped on the clamp and lifted by the material bucket lifting device to a designated position (above the feed inlet of the feed hose). It then rotates 90° around the vertical line and is located above the feed inlet. Subsequently, the material bucket rotates 180° around the horizontal axis so that the bucket opening faces downward. The lifting platform moves down so that the bucket opening is inserted into the feed inlet of the feed hose. The pressure block at the bucket opening is opened by a pin, so that the loaded powder material automatically enters the corresponding hopper along the feed hose under the action of gravity. This achieves fully automatic feeding, with high feeding efficiency and safety. It can effectively reduce the intensity of manual labor and ensure production safety and quality.

[0032] 6. The final forming device of the present invention includes a final forming lower die, a final forming upper die, and an ejection mechanism. The final forming lower die includes a second outer die sleeve, a third support sleeve, and a fourth support sleeve. The third support sleeve is slidably fitted in the inner cavity of the second outer die sleeve, and its upper end does not exceed the second outer die sleeve. The fourth support sleeve is slidably fitted in the inner cavity of the third support sleeve, and the height difference between the fourth support sleeve and the third support sleeve is adapted to the thickness of the annular step of the two-component annular part. The inner diameter of the second outer die sleeve is adapted to the outer diameter of the two-component annular blank. The radial thickness of the third support sleeve is greater than the radial thickness of the outer ring of the two-component annular blank and less than the radial thickness of the two-component annular blank. The inner diameter of the fourth support sleeve is less than the inner diameter of the inner ring of the two-component annular blank. The inner cavity of the second outer die sleeve and the top surface of the third support sleeve respectively form radial and axial limits on the two-component annular blank. The height difference space formed between the fourth support sleeve and the third support sleeve is used for the annular step of the two-component annular part product obtained by integral extrusion molding. It is convenient and efficient to process, and can effectively improve product quality and structural strength. The final forming upper die includes independently operating third and fourth pressure rings. The fourth pressure ring slides within the inner cavity of the third pressure ring. A downwardly extending shaping punch is fixedly mounted in the middle of the fourth pressure ring, and this shaping punch is adapted to the inner diameter of the fourth support sleeve. The outer diameter of the third pressure ring is adapted to the inner diameter of the second outer die sleeve. The projection of the third pressure ring is located within the annular area of ​​the top surface of the fourth support sleeve. The shaping punch of the upper die forms a radial limit on the inner ring of the two-component annular blank, and cooperates with the lower surface of the final forming upper die and the upper surface of the final forming lower die to integrally extrude and form a two-component annular part product with the target structure. This process is efficient, high-quality, and low-cost. The ejection mechanism is located below the third support sleeve, driving the third support sleeve to move upward, facilitating the removal of the extruded two-component annular part product.

[0033] 7. The tops of the third and fourth pressure rings of the final forming upper die of the present invention are respectively provided with heat insulation plates, and the bottoms of the second outer mold sleeve, third support sleeve, and fourth support sleeve of the final forming lower die are respectively provided with heat insulation plates to prevent heat transfer to the hydraulic mechanism that drives the upper and lower dies, thus ensuring the normal operation of the hydraulic mechanism. A first heat insulation cavity is provided on the outer side of the third pressure ring of the final forming upper die, and a second heat insulation cavity is provided on the outer side of the second outer mold sleeve of the final forming lower die to maintain the temperature stability of the blank and facilitate the extrusion forming of the workpiece.

[0034] 8. The automatic production method of the present invention first pre-extrudes and forms the outer ring (preform) of a bicomponent annular preform. Then, the inner ring forming cavity of the bicomponent annular preform is formed using the preformed outer ring, the second support sleeve, and the mold core. The inner ring powder material is then filled in, so that the inner ring powder material contacts the inner sidewall of the preformed outer ring. Finally, the first and second pressing rings are simultaneously pressed downward to obtain the extruded bicomponent annular preform. During the extrusion process, the powder material filled in the inner ring forming cavity partially permeates along the inner sidewall of the preformed outer ring, so that the final formed inner and outer rings are tightly connected, ensuring the stability and structural strength of the formed bicomponent annular preform, thereby improving the production quality of the bicomponent annular preform. The obtained bicomponent annular preform is placed into the final forming device. First, the upper final forming die is controlled to move downwards, causing the forming punch to pass through the inner hole of the bicomponent annular preform and insert into the inner cavity of the fourth support sleeve of the lower final forming die. This creates a closed forming cavity between the lower surfaces of the third and fourth pressure rings of the upper final forming die, the upper surfaces of the third and fourth support rings of the lower final forming die, the inner surface of the second outer die sleeve of the lower final forming die, the stepped surface between the third and fourth support rings, and the outer circumferential surface of the forming punch. Then, by continuing to move the upper final forming die downwards and the fourth pressure ring of the upper final forming die downwards, integral extrusion forming is achieved, resulting in a bicomponent annular product with the target structure. This process can automate the production task, achieving the goal of efficient, high-quality, and low-cost manufacturing of bicomponent annular products.

[0035] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0036] Figure 1 This is a structural location diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of the preforming device of the present invention;

[0038] Figure 3 This is a schematic diagram of the preform upper mold of the present invention;

[0039] Figure 4 This is a schematic diagram illustrating the assembly of the material bucket lifting device of the present invention;

[0040] Figure 5 for Figure 4 Top view;

[0041] Figure 6 This is an initial state diagram of the final forming device of the present invention;

[0042] Figure 7 This is a diagram showing the pressing state of the final forming device of the present invention.

[0043] In the attached diagram, 1 is the preforming device, 2 is the final forming device, 3 is the continuous sintering furnace, 4 is the upper preforming mold, 5 is the lower preforming mold, 6 is the feeding system, 7 is the first outer mold sleeve, 8 is the first support sleeve, 9 is the second support sleeve, 10 is the mold core, 11 is the feeding platform, 12 is the first pressure ring, 13 is the second pressure ring, 14 is the hopper, 15 is the drive mechanism, 16 is the lower final forming mold, 17 is the upper final forming mold, and 18 is the ejection mechanism. 19 is the second outer mold sleeve, 20 is the third support sleeve, 21 is the fourth support sleeve, 22 is the third pressure ring, 23 is the fourth pressure ring, 24 is the forming punch, 25 is the pressure plate, 26 is the limiting pad, 27 is the translation platform, 28 is the connecting arm, 29 is the clamping telescopic cylinder, 30 is the material barrel, 31 is the material barrel lifting device, 32 is the ejector pin, 33 is the pressure block, 34 is the guide rail, 35 is the lifting platform, 36 is the rotating platform, and 37 is the clamp. Detailed Implementation

[0044] Example 1

[0045] See Figures 1 to 7The automated production system for bi-component ring parts includes a preforming device 1, a final forming device 2, and a continuous sintering furnace 3. The preforming device 1 includes an upper preforming mold 4, a lower preforming mold 5, and a feeding system 6. The lower preforming mold 5 includes a first outer mold sleeve 7, a first support sleeve 8, a second support sleeve 9, and a mold core 10, all capable of independent up-and-down movement. A feeding platform 11 is fixedly installed on the outer peripheral sidewall of the first outer mold sleeve 7, flush with its upper surface. The first support sleeve 8 slides within the cavity of the first outer mold sleeve 7, the second support sleeve 9 slides within the cavity of the first support sleeve 8, and the mold core 10 slides within the cavity of the second support sleeve 9. The upper preforming mold 4 includes a first pressure ring 12 and a second pressure ring 13, both capable of independent up-and-down movement. The second pressure ring 13 slides within the cavity of the first pressure ring 12. The first pressure ring 12 corresponds to the first support sleeve 8, and the second pressure ring 13 corresponds to the second support sleeve 9. In this embodiment, the first pressure ring 12 is fixed below a pressure plate 25 and has a gap space. The length of the second pressure ring 13 is the same as the length of the first pressure ring 12. It also includes a limiting pad 26. The limiting pad 26 slides in the gap space between the first pressure ring 12 and the pressure plate 25 in the horizontal direction. By controlling the position of the limiting pad, the upper end surfaces of the first pressure ring and the second pressure ring are misaligned or flush. Specifically, the limiting pad is driven by a hydraulic cylinder to move in the horizontal direction. The lower end opening of the second pressure ring forms a relief hole for the mold core. The second pressure ring is provided with a vent hole that connects to the gap space. The feeding system 6 consists of two components, each including a hopper 14. The top of the hopper 14 is connected to a feeding hose, and the bottom of the hopper 14 is open. In this embodiment, the feeding system 6 also includes a bucket 30 and a bucket lifting device 31. The upstream end of the feeding hose is provided with a receiving port, and a pin 32 is provided in the receiving port. The bucket has a conical opening that is adapted to the receiving port. A pressure block 33 is provided in the bucket and is pressed against the opening by a compression spring to form a seal. The bucket lifting device includes a guide rail 34 and a lifting platform 35 that is slidably fitted on the guide rail. A rotating platform 36 is hinged 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 37 is provided on the rotating platform for clamping the bucket. Specifically, the lifting platform is driven to move up and down by a screw and nut transmission mechanism, and the rotating platform is driven to rotate around a horizontal axis by a worm gear transmission mechanism. Two feeding systems 6 are respectively set on both sides of the preforming lower mold 5. One feeding system's hopper is loaded with silicon carbide powder, and the other feeding system's hopper is loaded with aluminum powder.The bottom of the hoppers of each feeding system 6 are attached to the feeding platform 11, and are respectively translated along the feeding platform 11 by the driving mechanism 15. In this embodiment, the driving mechanism 15 includes a translation platform 27, a connecting arm 28, and a pressing telescopic cylinder 29. The translation platform 27 is driven by a hydraulic cylinder to move in the horizontal direction. One end of the connecting arm 28 is hinged to the hopper, and the other end is hinged to the translation platform. The cylinder body of the pressing telescopic cylinder 29 is hinged to the translation platform and is located above the connecting arm. The piston rod of the pressing telescopic cylinder is hinged to the connecting arm. The final forming device 2 includes a final forming lower mold 16, a final forming upper mold 17, and an ejection mechanism 18. The final forming lower mold 16 includes a second outer mold sleeve 19, a third support sleeve 20, and a fourth support sleeve 21. The bottom of the second outer mold sleeve, the third support sleeve, and the fourth support sleeve are respectively provided with heat insulation plates. A second heat insulation cavity is provided on the outer side of the second outer mold sleeve. Specifically, the second heat insulation cavity is arranged around the outer circumferential surface of the second outer mold sleeve. The third support sleeve 20 is slidably fitted inside the second outer mold sleeve 19, with its upper end not exceeding the second outer mold sleeve 19. The fourth support sleeve 21 is slidably fitted inside the third support sleeve 20, and the height difference between the fourth support sleeve 21 and the third support sleeve 20 is adapted to the thickness of the annular step of the bicomponent annular part. The inner diameter of the second outer mold sleeve 19 is adapted to the outer diameter of the bicomponent annular blank. The radial thickness of the third support sleeve 20 is greater than the radial thickness of the outer ring of the bicomponent annular blank but less than the radial thickness of the bicomponent annular blank. The inner diameter of the fourth support sleeve 20 is less than the inner diameter of the inner ring of the bicomponent annular blank. The final forming upper mold 17 includes independently operating third pressure ring 22 and fourth pressure ring 23. The top of the third pressure ring 22 and the fourth pressure ring 23 are respectively provided with heat insulation plates. A first heat insulation cavity is provided on the outer side of the third pressure ring. Specifically, the first heat insulation cavity is arranged around the outer circumferential surface of the third pressure ring. The fourth pressure ring 23 is slidably fitted into the inner cavity of the third pressure ring 22. A downwardly extending shaping punch 24 is fixedly provided in the middle of the fourth pressure ring 23. The shaping punch 24 is adapted to the inner diameter of the fourth support sleeve 21. The outer diameter of the third pressure ring 22 is adapted to the inner diameter of the second outer mold sleeve 19. The projection of the third pressure ring 22 is located within the annular range of the top surface of the fourth support sleeve 23. The ejection mechanism 18 is located below the third support sleeve 20 and drives the third support sleeve 20 to move upward. The preforming device 1 is located in front of the kiln head of the continuous sintering furnace and transfers the preformed billet to the kiln head of the continuous sintering furnace through the first transfer robot. The final forming device 2 is located behind the kiln tail of the continuous sintering furnace and transfers the sintered billet to the final forming device through the second transfer robot.

[0046] Example 2

[0047] The method for producing two-component ring parts using the automated production system of Example 1 includes the following steps:

[0048] 1) When the preforming device is in the initial state, the upper end face of the first outer mold sleeve, the first support sleeve, the second support sleeve, and the mold core of the preforming lower mold is located on the first reference surface, and the lower end face of the first pressure ring and the second pressure ring is located on the second reference surface. Obviously, the first reference surface is located below the second reference surface.

[0049] 2) The preforming lower mold moves to form an outer ring forming cavity for a two-component annular part between the first outer mold sleeve, the first support sleeve, and the second support sleeve. Specifically, the first support sleeve of the preforming lower mold remains in its original position, and the first outer mold sleeve, the second support sleeve, and the mold core of the preforming lower mold move upward by the same distance to form an outer ring forming cavity for a two-component annular blank between the first outer mold sleeve, the first support sleeve, and the second support sleeve.

[0050] 3) The bucket loaded with silicon carbide powder is clamped on the corresponding side (left side in this application) of the feeding system and lifted to the designated position (higher than the inlet of the feed hose) by the bucket lifting device. It then rotates 90° around the plumb line and moves to the top of the inlet. Subsequently, the bucket rotates 180° around the horizontal axis so that the bucket opening faces downward. The lifting platform moves down so that the bucket opening is inserted into the inlet of the feed hose. The pressure block at the bucket opening is opened 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 feeding.

[0051] 4) The hopper on the left side moves to the right along with the feeding platform until the bottom of the hopper opens and covers the outer ring cavity. The silicon carbide powder fills the outer ring cavity under the action of gravity. Then the feeding system resets and scrapes the outer ring cavity to ensure that the silicon carbide powder filling the outer ring cavity is full and flush with the upper end face of the lower die, so as to avoid the spillage of material during the extrusion process.

[0052] 5) The preforming upper die moves downward to pre-extrude the silicon carbide powder material into the outer ring of the two-component annular blank;

[0053] 6) The preforming upper mold is reset, and the preforming lower mold moves to form an inner ring forming cavity for the two-component annular blank between the outer ring, the second support sleeve, and the mold core. Specifically, the first support sleeve of the preforming lower mold moves upward first, so that the upper end face of the outer ring of the two-component annular blank obtained in step 5) is flush with the upper end face of the first outer mold sleeve of the preforming lower mold, and the second support sleeve of the preforming lower mold moves downward to the first reference surface.

[0054] 7) The bucket loaded with aluminum powder is clamped on the corresponding side (right side in this application) of the feeding system and lifted to the designated position (higher than the inlet of the feeding hose) by the bucket lifting device. It then rotates 90° around the plumb line and moves to the top of the inlet. Subsequently, the bucket rotates 180° around the horizontal axis so that the bucket opening faces downward. The lifting platform moves down so that the bucket opening is inserted into the inlet of the feeding hose. The pressure block at the bucket opening is opened by the ejector pin, so that the loaded aluminum powder automatically enters the corresponding hopper along the feeding hose under the action of gravity, realizing fully automatic feeding.

[0055] 8) The hopper on the right side moves to the left along the feeding platform until the bottom of the hopper opens and covers the inner ring cavity. The aluminum powder fills the inner ring cavity under the action of gravity. Then the feeding system resets and scrapes the inner ring cavity to ensure that the aluminum powder filling the inner ring cavity is full and flush with the upper end face of the lower die, so as to avoid the situation of spillage during the extrusion process.

[0056] 9) Drive the limiting pad block to move horizontally to the space between the first pressure ring, the second pressure ring and the pressure plate, so that the first pressure ring and the second pressure ring simultaneously extrude the outer ring and inner ring powder material downward to obtain the overall two-component ring blank. During the extrusion process, the first support sleeve of the pre-forming lower die moves downward to be flush with the upper end face of the second support sleeve, that is, the first support sleeve moves downward to the first reference surface.

[0057] 10) After extrusion, the preforming upper mold maintains downward pressure, and the first outer mold sleeve and mold core of the preforming lower mold move downward until their upper end faces are flush with the upper end faces of the first support sleeve and the second support sleeve, that is, they move downward to the first reference surface, and the upper mold is reset.

[0058] 11) The preformed billet is transferred to the kiln head of the continuous sintering furnace using the first transfer robot arm, heated to 500-600℃, and then the sintered billet is transferred to the inner cavity of the second outer mold sleeve of the final forming lower mold using the first transfer robot arm, and supported on the third support sleeve.

[0059] 12) Control the downward movement of the final forming upper die so that the forming punch passes through the inner hole of the two-component annular blank and inserts into the inner cavity of the fourth support sleeve of the final forming lower die;

[0060] 13) The final forming upper die continues to move downward, so that the third pressure ring presses against the upper surface of the two-component annular blank and the fourth pressure ring presses against the upper surface of the two-component annular blank.

[0061] 14) The fourth pressure ring of the final forming upper die continues to move downward until the bottom surface of the fourth pressure ring is below the top surface of the third support ring, extruding the inner ring of the two-component annular blank downward to form an annular step.

[0062] 15) After the extrusion molding is completed, the final molding upper mold is reset, the ejection mechanism is activated, and the third support sleeve of the final molding lower mold is driven to move upward until it is flush with the top surface of the second outer mold sleeve of the final molding lower mold. The part can then be removed to obtain the two-component ring product.

Claims

1. An automated production system for a two-component ring-shaped component, characterized in that, It includes a preforming device (1), a final forming device (2), and a continuous sintering furnace (3). The preforming device (1) includes a preforming upper mold (4), a preforming lower mold (5), and a feeding system (6). The preforming lower mold (5) includes a first outer mold sleeve (7), a first support sleeve (8), a second support sleeve (9), and a mold core (10) that can move up and down independently. A feeding platform (11) is fixedly provided on the outer peripheral side wall of the first outer mold sleeve (7), which is flush with the upper end face of the first outer mold sleeve (7). The first support sleeve (8) slides in the inner cavity of the first outer mold sleeve (7), the second support sleeve (9) slides in the inner cavity of the first support sleeve (8), and the mold core (10) slides in the inner cavity of the second support sleeve (9). The preforming upper mold (4) includes a first pressure ring (12) and a second pressure ring (10) that can move up and down independently. 13), the second pressure ring (13) is slidably fitted in the inner cavity of the first pressure ring (12), and the first pressure ring (12) corresponds to the first support sleeve (8), and the second pressure ring (13) corresponds to the second support sleeve (9). The first pressure ring (12) is fixed below a pressure plate (25) and has a gap space. The length of the second pressure ring (13) is the same as the length of the first pressure ring (12). It also includes a limiting pad (26), which is slidably fitted in the gap space between the first pressure ring (12) and the pressure plate (25) in the horizontal direction. The limiting pad is driven by a hydraulic cylinder to move in the horizontal direction. The lower end opening of the second pressure ring forms a relief hole for the mold core. The second pressure ring is provided with a vent hole that connects to the gap space. There are two feeding systems (6). Each feeding system (6) includes a hopper (14). The top of the hopper (14) is connected to a feeding hose. The bottom of the hopper (14) is open. The two feeding systems (6) are respectively set on both sides of the preformed lower mold (5). The bottom of the hopper of each feeding system (6) is attached to the feeding platform (11) and is translated along the feeding platform (11) by a drive mechanism (15). The feeding hose at the top of one of the hoppers is used to connect to the outer ring powder material source. The feed hose at the top of another hopper is used to connect to the inner ring powder material source. The drive mechanism (15) includes a translation platform (27), a connecting arm (28), and a pressing telescopic cylinder (29). The translation platform (27) is driven by a hydraulic cylinder to move horizontally. One end of the connecting arm (28) is hinged to the hopper, and the other end is hinged to the translation platform. The cylinder body of the pressing telescopic cylinder (29) is hinged to the translation platform and located above the connecting arm. The piston rod of the pressing telescopic cylinder is hinged to the connecting arm. The final forming device (2) includes a final forming lower mold (16), a final forming upper mold (17), and an ejection mechanism (18). The final forming lower mold (16) includes a second outer mold sleeve (19), a third support sleeve (20), and a fourth support sleeve (21). The third support sleeve (20) is slidably fitted inside the cavity of the second outer mold sleeve (19), and its upper end does not exceed the second outer mold sleeve (19). The fourth support sleeve (21) is slidably fitted inside the cavity of the third support sleeve (20), and the height difference between the fourth support sleeve (21) and the third support sleeve (20) is adapted to the thickness of the annular step of the bicomponent annular part. The inner diameter of the second outer mold sleeve (19) is adapted to the outer diameter of the bicomponent annular blank. The radial thickness of the third support sleeve (20) is greater than the outer ring radial thickness of the bicomponent annular blank and less than the thickness of the bicomponent annular part. The radial thickness of the annular blank is such that the inner diameter of the fourth support sleeve (21) is smaller than the inner diameter of the inner ring of the two-component annular blank. The final forming upper die (17) includes an independently operating third pressure ring (22) and a fourth pressure ring (23). The fourth pressure ring (23) is slidably fitted in the inner cavity of the third pressure ring (22). A downwardly extending forming punch (24) is fixedly provided in the middle of the fourth pressure ring (23). The forming punch (24) is adapted to the inner diameter of the fourth support sleeve (21). The outer diameter of the third pressure ring (22) is adapted to the inner diameter of the second outer die sleeve (19). The projection of the third pressure ring (22) is located within the annular range of the top surface of the fourth support sleeve (21). The ejection mechanism (18) is located below the third support sleeve (20) and drives the third support sleeve (20) to move upward. The preforming device (1) is located in front of the kiln head of the continuous sintering furnace, and the preformed blank is transferred to the kiln head of the continuous sintering furnace by the first transfer robot. The final forming device (2) is located behind the kiln tail of the continuous sintering furnace, and the sintered blank is transferred to the final forming device by the second transfer robot.

2. The automated production system for two-component ring parts according to claim 1, characterized in that, The feeding system (6) also includes a material bucket (30) and a material bucket lifting device (31). The upstream end of the feeding hose is provided with a material inlet, and a pin (32) is provided in the material inlet. The opening of the material bucket is conical and adapted to the material inlet. A pressure block (33) is installed inside the material bucket and is pressed against the opening by a compression spring to form a seal. The material bucket lifting device includes a guide rail (34) and a lifting platform (35) that slides on the guide rail. A rotating platform (36) is hinged 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 (37) is provided on the rotating platform for clamping the material bucket.

3. The automated production system for two-component ring parts according to claim 1, characterized in that, The top of the third pressure ring (22) and the fourth pressure ring (23) are respectively provided with heat insulation plates, and the bottom of the second outer mold sleeve, the third support sleeve and the fourth support sleeve are respectively provided with heat insulation plates. The outer side of the third pressure ring is provided with a first heat insulation cavity, and the outer side of the second outer mold sleeve is provided with a second heat insulation cavity. The first heat insulation cavity is arranged around the outer circumferential surface of the third pressure ring, and the second heat insulation cavity is arranged around the outer circumferential surface of the second outer mold sleeve.

4. A method for producing two-component ring parts using any one of the automated production systems of claims 1-3, characterized in that, Includes the following steps: 1) The preforming lower mold action forms an outer ring forming cavity for a two-component annular blank between the first outer mold sleeve, the first support sleeve, and the second support sleeve, and outer ring powder material is added into the outer ring forming cavity; 2) The preforming upper die moves to cause the first pressure ring to pre-extract the powder material downwards to obtain the outer ring of the two-component annular blank; 3) The upper preforming mold is reset and the lower preforming mold moves, so that the inner ring forming cavity of the two-component annular blank is formed between the outer ring, the second support sleeve and the mold core, and the inner ring powder material is added into the inner ring forming cavity. 4) The preforming upper die operates, causing the first and second pressing rings to simultaneously press the outer and inner ring powder materials downwards, resulting in a two-component annular preform. 5) The preformed upper mold is reset, and the first transfer robot is used to transfer the two-component annular billet to the kiln head of the continuous sintering furnace, and the two-component annular billet is heated to 500-600℃. 6) The sintered bicomponent annular billet is transferred to the inner cavity of the second outer mold sleeve at the kiln tail of the continuous sintering furnace using the second transfer robot, and supported on the third support sleeve. 7) Control the final forming upper die to move downwards, so that the forming punch passes through the inner hole of the two-component annular blank and inserts into the inner cavity of the fourth support sleeve; 8) The final forming upper die continues to move downwards, so that the third pressure ring presses against the upper surface of the two-component annular blank and the fourth pressure ring presses against the upper surface of the two-component annular blank. 9) The fourth pressure ring of the final forming upper die continues to move downward, extruding the inner ring of the two-component annular blank downward to form an annular step; 10) After the extrusion molding is completed, the final molding upper mold is reset, the ejection mechanism is activated, and the third support sleeve is driven to move upward, so that the two-component ring product can be obtained.

5. The method according to claim 4, characterized in that, Step 1) Before the preforming lower mold moves, the upper surfaces of the first outer mold sleeve, the first support sleeve, the second support sleeve, and the mold core are located on the first reference surface. By moving the first outer mold sleeve and the second support sleeve upward, an outer ring forming cavity for a two-component annular blank is formed between the first outer mold sleeve, the first support sleeve, and the second support sleeve. Step 2) Before the preforming upper mold moves, the lower surfaces of the first pressure ring and the second pressure ring are located on the second reference surface.

6. The method according to claim 4, characterized in that, Step 3) The first support sleeve of the preforming lower die moves upward, so that the upper end face of the outer ring of the bicomponent annular blank obtained in step 2) is flush with the upper end face of the first outer die sleeve. Step 4) During the extrusion process, the first support sleeve moves downward until it is flush with the upper end face of the second support sleeve. Step 5) Before the preforming upper die is reset, the preforming upper die maintains downward pressure, and the first outer die sleeve and the die core move downward until their upper end faces are flush with the upper end faces of the first support sleeve and the second support sleeve.

7. The method according to claim 4, characterized in that, Step 9) The fourth pressure ring moves until the bottom surface of the fourth pressure ring is below the top surface of the third support ring.

8. The method according to claim 4, characterized in that, Step 10) Move the third support sleeve upwards until it is flush with the top surface of the second outer mold sleeve.

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