Final forming device and method for two-component ring blank

Abstract

A final forming device for a two-component annular blank comprises a lower die, an upper die, and an ejection mechanism. The lower die comprises an outer die sleeve, first and second support sleeves, the first support sleeve slidingly fitting within the inner cavity of the outer die sleeve, the second support sleeve slidingly fitting within the inner cavity of the first support sleeve, and the height difference of the second support sleeve below the first support sleeve adapted to the thickness of the annular step of the two-component annular part. The inner cavity diameter of the outer die sleeve adapted to the outer diameter of the two-component annular blank. The radial thickness of the first 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 upper die comprises first and second pressure rings, the second pressure ring slidingly fitting within the inner cavity of the first pressure ring, a downwardly extending shaping punch fixedly disposed in the middle of the second pressure ring, and an ejection mechanism driving the first support sleeve upward. The present invention has a simple structure and is easy to operate. It can integrally form a two-component annular blank to obtain a two-component annular part product, effectively ensuring product quality and production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of material forming, and in particular to a final forming device and method for a two-component annular blank. Background Art

[0002] Some brake disc manufacturers have produced an aluminum inner ring that serves as a mounting frame, with an annular step welded to the middle of the aluminum ring for connection to the wheel hub. The outer ring is a silicon carbide ring that serves as a friction disc for contact with the brake pads. Currently, brake discs with this structure are typically produced separately for the inner and outer rings, then welded with an annular step. Finally, the outer ring (friction disc) and inner ring (mounting frame) are combined using fasteners to form the overall structure. This production process is relatively complex and requires extremely high assembly precision, resulting in a low brake disc qualification rate and high production costs. Furthermore, the use of fasteners to connect the mounting frame and friction disc does not effectively guarantee the overall quality of the brake disc.

[0003] At present, the newly designed two-component ring preforming device can obtain a two-component ring blank with the inner ring and outer ring located on the same plane through the cooperation of the lower mold and the upper mold of the matching mold. However, how to further process it efficiently, with high quality and low cost to obtain a two-component ring product with the target structure is an urgent problem to be solved by technical personnel in this field. Summary of the Invention

[0004] One of the purposes of the present invention is to address the deficiencies in the prior art and provide a final forming device for a two-component ring blank, which has a simple structure and is easy to operate. It can integrally form the two-component ring blank to obtain a two-component ring product, effectively ensuring product quality and production efficiency.

[0005] The second object of the present invention is to provide a method for processing a two-component annular product using the above-mentioned final forming device, which has simple processing steps and is efficient and suitable for industrial large-scale production and processing of two-component annular products.

[0006] The technical solution for achieving one of the objectives of the present invention is: a final forming device for a two-component ring blank, comprising a lower die, an upper die, and an ejection mechanism, wherein the lower die comprises an outer die sleeve, a first support sleeve, and a second support sleeve, wherein the first support sleeve is slidably fitted in the inner cavity of the outer die sleeve, and its upper end does not exceed the outer die sleeve, and the second support sleeve is slidably fitted in the inner cavity of the first support sleeve, and the height difference of the second support sleeve below the first support sleeve is adapted to the thickness of the annular step of the two-component ring part, the inner cavity diameter of the outer die sleeve is adapted to the outer diameter of the two-component ring blank, the radial thickness of the first support sleeve is greater than the radial thickness of the outer ring of the two-component ring blank, and the smaller Due to the radial thickness of the two-component annular blank, the inner diameter of the second support sleeve is smaller than the inner diameter of the inner ring of the two-component annular blank. The upper die includes a first pressure ring and a second pressure ring that act independently. The second pressure ring slides in the inner cavity of the first pressure ring. A shaping punch extending downward is fixedly provided in the middle of the second pressure ring. The shaping punch is adapted to the inner diameter of the second support sleeve of the lower die. The outer diameter of the first pressure ring is adapted to the inner diameter of the outer die sleeve of the lower die. The projection of the first pressure ring is located within the top annular range of the second support sleeve of the lower die. The ejection mechanism is arranged below the first support sleeve of the lower die to drive the first support sleeve to move upward.

[0007] The tops of the first pressure ring and the second pressure ring of the upper mold are respectively provided with heat insulation plates, and the bottoms of the outer mold sleeve, the first support sleeve and the second support sleeve of the lower mold are respectively provided with heat insulation plates.

[0008] A first heat preservation cavity is provided on the outer side of the first pressure ring of the upper mold, and a second heat preservation cavity is provided on the outer side of the outer mold sleeve of the lower mold.

[0009] The first heat preservation cavity is arranged around the outer circumference of the first pressure ring of the upper mold, and the second heat preservation cavity is arranged around the outer circumference of the outer mold sleeve of the lower mold.

[0010] The technical solution for achieving the second object of the present invention is: a method for processing a two-component annular part using any of the above-mentioned final forming devices, comprising the following steps:

[0011] 1) heating the two-component annular blank to 500-600°C;

[0012] 2) placing the heated two-component annular blank in the inner cavity of the outer mold sleeve of the lower mold and supporting it on the first support sleeve;

[0013] 3) Controlling the upper die to move downward so that the shaping punch passes through the inner hole of the two-component annular blank and is inserted into the inner cavity of the second support sleeve of the lower die;

[0014] 4) The upper die continues to move downward, so that the first pressure ring is pressed tightly against the upper surface of the two-component annular blank, and the second pressure ring is pressed tightly against the upper surface of the two-component annular blank;

[0015] 5) The second pressure ring of the upper die continues to move downward, extruding the inner ring of the two-component annular blank downward to form an annular step;

[0016] 6) After the extrusion molding is completed, the upper mold is reset, the ejection mechanism is activated, and the first support sleeve of the lower mold is driven to move upward, and the product can be taken out to obtain a two-component annular product.

[0017] Preferably, step 1) is heated to 550°C.

[0018] Furthermore, in step 5), the second pressure ring of the upper mold moves until the bottom surface of the second pressure ring is located below the top surface of the first support ring of the lower mold.

[0019] Furthermore, in step 6), the first support sleeve of the lower mold moves upward until it is flush with the top surface of the outer mold sleeve of the lower mold.

[0020] The above technical solution has the following beneficial effects:

[0021] 1. A final forming device for a two-component annular blank comprises a lower die, an upper die, and an ejection mechanism. The lower die comprises an outer die sleeve, a first support sleeve, and a second support sleeve. The first support sleeve slides within the inner cavity of the outer die sleeve, with its upper end not protruding beyond the outer die sleeve. The second support sleeve slides within the inner cavity of the first support sleeve, and the height difference between the second support sleeve and the first support sleeve is adapted to the thickness of the annular step of the two-component annular part. The inner cavity diameter of the outer die sleeve is adapted to the outer diameter of the two-component annular blank. The radial thickness of the first support sleeve is greater than the radial thickness of the outer ring of the two-component annular blank, but less than the radial thickness of the two-component annular blank. The inner cavity diameter of the second support sleeve is smaller than the inner diameter of the inner ring of the two-component annular blank. The inner cavity of the outer die sleeve and the top surface of the first support sleeve respectively provide radial and axial limits for the two-component annular blank. The height difference between the second support sleeve and the first support sleeve is used to form the annular step of the two-component annular part product obtained by integral extrusion molding. This facilitates processing, is efficient, and can effectively improve product quality and structural strength. The upper die includes a first pressure ring and a second pressure ring that act independently. The second pressure ring slides in the inner cavity of the first pressure ring. A shaping punch extending downward is fixedly provided in the middle of the second pressure ring. The shaping punch is adapted to the inner cavity diameter of the second support sleeve of the lower die. The outer diameter of the first pressure ring is adapted to the inner cavity diameter of the outer die sleeve of the lower die. The projection of the first pressure ring is located within the annular range of the top surface of the second support sleeve of the lower die. The shaping punch of the upper die forms a radial limit on the inner ring of the two-component annular blank, cooperates with the lower surface of the upper die and the upper surface of the lower die, and is extruded into a single piece to obtain a two-component annular product with a target structure. The processing is efficient, high-quality, and low-cost. The ejection mechanism is arranged below the first support sleeve of the lower die, driving the first support sleeve to move upward, making it convenient to remove the two-component annular product that has been extruded.

[0022] 2. The tops of the first pressure ring and the second pressure ring of the upper mold are respectively provided with heat insulation plates, and the bottoms of the outer mold sleeve, the first support sleeve, and the second support sleeve of the lower mold are respectively provided with heat insulation plates to prevent heat from being transferred to the hydraulic mechanism that drives the upper mold and the lower mold, thereby ensuring the normal operation of the hydraulic mechanism.

[0023] 3. A first heat preservation cavity is provided on the outside of the first pressure ring of the upper die, and a second heat preservation cavity is provided on the outside of the outer die sleeve of the lower die to ensure that the temperature of the blank remains stable, which is conducive to extrusion molding.

[0024] 4. The final forming method of the present invention usually first heats the two-component annular blank to 500-600°C to eliminate the internal stress of the two-component annular blank, reduce the extrusion deformation resistance of the outer ring and inner ring of the two-component annular blank, and facilitate the use of the final forming device to extrude the two-component annular blank into shape.

[0025] 5. The final forming method of the present invention first controls the upper die to move downward, allowing the shaping punch to pass through the inner hole of the two-component annular blank and into the inner cavity of the second support sleeve of the lower die. This creates a closed forming cavity between the lower surfaces of the first and second pressure rings of the upper die, the upper surfaces of the first and second support rings of the lower die, the inner surface of the outer die sleeve of the lower die, the stepped surface between the first and second support rings, and the outer peripheral surface of the shaping punch. The upper die then moves downward, and the second pressure ring of the upper die continues to move downward, achieving integrated extrusion molding to obtain a two-component annular product with the desired structure. This automated production process achieves the goal of efficiently, high-quality, and low-cost manufacturing of two-component annular products.

[0026] The following is a further description with reference to the accompanying drawings and specific implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram showing the initial state of the final forming device of the present invention;

[0028] Figure 2 It is a pressing state diagram of the final forming device of the present invention.

[0029] In the accompanying drawings, 1 is the lower die, 2 is the upper die, 3 is the ejection mechanism, 4 is the outer die sleeve, 5 is the first support sleeve, 6 is the second support sleeve, 7 is the first pressure ring, 8 is the second pressure ring, and 9 is the shaping punch. DETAILED DESCRIPTION

[0030] Example 1

[0031] See also Figure 1 and Figure 2The final forming device for a two-component annular blank includes a lower die 1, an upper die 2, and an ejection mechanism 3. The lower die 1 includes an outer die sleeve 4, a first support sleeve 5, and a second support sleeve 6. The bottoms of the outer die sleeve 4, the first support sleeve 5, and the second support sleeve 6 of the lower die are each provided with a heat insulation plate. A second heat preservation cavity is provided on the outer side of the outer die sleeve 4 of the lower die. Specifically, the second heat preservation cavity is provided around the outer circumference of the outer die sleeve of the lower die. The first support sleeve 5 slides within the inner cavity of the outer die sleeve 4, with its upper end not extending beyond the outer die sleeve. The second support sleeve 6 slides within the inner cavity of the first support sleeve 5, and the height difference between the second support sleeve and the first support sleeve is adapted to the thickness of the annular step of the two-component annular blank. The inner cavity diameter of the outer die sleeve 4 is adapted to the outer diameter of the two-component annular blank. The radial thickness of the first support sleeve 5 is greater than the radial thickness of the outer ring of the two-component annular blank, but less than the radial thickness of the two-component annular blank. The inner cavity diameter of the second support sleeve 6 is smaller than the inner diameter of the inner ring of the two-component annular blank. The upper die 2 includes a first pressure ring 7 and a second pressure ring 8 that act independently. The tops of the first pressure ring 7 and the second pressure ring 8 of the upper die are respectively provided with heat insulation plates. The outer side of the first pressure ring 7 of the upper die is provided with a first heat preservation cavity. Specifically, the first heat preservation cavity is arranged around the outer peripheral surface of the first pressure ring of the upper die. The second pressure ring 8 slides in the inner cavity of the first pressure ring 7. A shaping punch 9 extending downward is fixedly provided in the middle of the second pressure ring 8. The shaping punch 9 is adapted to the inner cavity diameter of the second support sleeve 6 of the lower die. The outer diameter of the first pressure ring 7 is adapted to the inner cavity diameter of the lower die outer die sleeve 4. The projection of the first pressure ring 7 is located within the annular range of the top surface of the second support sleeve 6 of the lower die. The ejection mechanism 3 is arranged below the first support sleeve 5 of the lower die to drive the first support sleeve 5 to move upward.

[0032] Example 2

[0033] The method for processing a two-component ring part using the final forming device of Example 1 first uses the two-component ring part preforming device to process a two-component ring blank with an inner ring (obtained by pressing aluminum powder) and an outer ring (obtained by pressing silicon carbide powder) located on the same plane as the processed blank, including the following steps:

[0034] 1) Heat the two-component annular blank to 500-600°C, usually, the optimal temperature is 550°C;

[0035] 2) placing the heated two-component annular blank in the inner cavity of the outer mold sleeve of the lower mold and supporting it on the first support sleeve;

[0036] 3) Controlling the upper die to move downward so that the shaping punch passes through the inner hole of the two-component annular blank and is inserted into the inner cavity of the second support sleeve of the lower die;

[0037] 4) The upper die continues to move downward, so that the first pressure ring is pressed tightly against the upper surface of the two-component annular blank, and the second pressure ring is pressed tightly against the upper surface of the two-component annular blank;

[0038] 5) The second pressure ring of the upper die continues to move downward until the bottom surface of the second pressure ring is located below the top surface of the first support ring of the lower die, and the inner ring of the two-component annular blank is extruded downward to form an annular step;

[0039] 6) After the extrusion molding is completed, the upper mold is reset, the ejection mechanism is activated, and the first support sleeve of the lower mold is driven upward until it is flush with the top surface of the outer mold sleeve of the lower mold. The product can then be removed to obtain a two-component annular product.

Claims

1. A final forming device for a two-component annular blank, characterized in that: It includes a lower mold (1), an upper mold (2), and an ejection mechanism (3). The lower mold (1) includes an outer mold sleeve (4), a first support sleeve (5), and a second support sleeve (6). The bottoms of the outer mold sleeve (4), the first support sleeve (5), and the second support sleeve (6) are respectively provided with heat insulation plates. A second heat preservation cavity is provided on the outside of the outer mold sleeve (4). The first support sleeve (5) is slidably fitted in the inner cavity of the outer mold sleeve (4), and its upper end does not exceed the outer mold sleeve. The second support sleeve (6) is slidably fitted in the inner cavity of the first support sleeve (5), and the height difference of the second support sleeve below the first support sleeve is adapted to the thickness of the annular step of the two-component annular part. The inner cavity diameter of the outer mold sleeve (4) is adapted to the outer diameter of the two-component annular blank. The radial thickness of the first support sleeve (5) 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 cavity diameter of the second support sleeve (6) is smaller than the inner diameter of the inner ring of the two-component annular blank. The upper mold (2) comprises a first pressure ring (7) and a second pressure ring (8) which act independently. The tops of the first pressure ring (7) and the second pressure ring (8) are respectively provided with heat insulation plates. The outer side of the first pressure ring (7) is provided with a first heat preservation cavity. The second pressure ring (8) is slidably fitted in the inner cavity of the first pressure ring (7). A shaping punch (9) extending downward is fixedly provided in the middle of the second pressure ring (8). The shaping punch (9) is adapted to the inner cavity diameter of the second support sleeve (6) of the lower die. The outer diameter of the first pressure ring (7) is adapted to the inner cavity diameter of the outer die sleeve (4) of the lower die. The projection of the first pressure ring (7) is located within the annular range of the top surface of the second support sleeve (6) of the lower die. The ejection mechanism (3) is arranged below the first support sleeve (5) of the lower die, and drives the first support sleeve (5) to move upward.

2. The final forming device for a two-component annular blank according to claim 1, characterized in that: The first heat preservation cavity is arranged around the outer circumference of the first pressure ring of the upper mold, and the second heat preservation cavity is arranged around the outer circumference of the outer mold sleeve of the lower mold.

3. A method for processing a two-component ring part using the final forming device according to claim 1 or 2, characterized in that: The following steps are involved: 1) Heat the two-component ring blank to 500-600℃; 2) placing the heated two-component annular blank in the inner cavity of the outer mold sleeve of the lower mold and supporting it on the first support sleeve; 3) Control the upper die to move downward so that the shaping punch passes through the inner hole of the two-component ring blank and is inserted into the inner cavity of the second support sleeve of the lower die; 4) The upper die continues to move downward, so that the first pressure ring is pressed tightly against the upper surface of the two-component annular blank, and the second pressure ring is pressed tightly against the upper surface of the two-component annular blank; 5) The second pressure ring of the upper die continues to move downward, extruding the inner ring of the two-component annular blank downward to form an annular step; 6) After the extrusion molding is completed, the upper mold is reset, the ejection mechanism is activated, and the first support sleeve of the lower mold is driven upward to remove the product to obtain a two-component ring product.

4. The method according to claim 3, characterized in that Step 1) Heat to 550°C.

5. The method according to claim 3, characterized in that Step 5) The second pressure ring of the upper mold moves until the bottom surface of the second pressure ring is located below the top surface of the first support ring of the lower mold.

6. The method according to claim 3, characterized in that Step 6) The first support sleeve of the lower mold moves upward until it is flush with the top surface of the outer mold sleeve of the lower mold.

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