CN218946055U - Expansion-pressing composite forming device for forming small round corner features of thin-wall part - Google Patents
Expansion-pressing composite forming device for forming small round corner features of thin-wall part Download PDFInfo
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- CN218946055U CN218946055U CN202222004959.5U CN202222004959U CN218946055U CN 218946055 U CN218946055 U CN 218946055U CN 202222004959 U CN202222004959 U CN 202222004959U CN 218946055 U CN218946055 U CN 218946055U
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Abstract
The utility model relates to the field of part forming, in particular to an expansion pressure composite forming device for forming small round corner features of a thin-wall part, which comprises a blank holder, wherein the blank holder consists of an upper part and a lower part which are connected through screws and are provided with grooves, an upper cover and a sealing ring are placed in the grooves to form a sealed upper liquid chamber, the blank holder is matched with a support body, a liquid chamber is arranged in the support body, and a liquid path is formed in the side wall of the support body for liquid to enter. The forming requires a preformed mould and a final forming mould, the preformed mould is connected with a hydraulic press and can be matched with a liquid discharging chamber to complete passive hydraulic preformed, the final forming mould is connected with a supporting body through threads and can be combined with a liquid feeding chamber to complete active hydraulic bulging to achieve the final forming of the part, the utility model completes the preforming through the cooperation of the preforming die and the liquid discharging chamber of the same device, and then completes the final forming through the cooperation of the final forming die and the liquid feeding chamber, thereby improving the forming quality and speed.
Description
Technical Field
The utility model relates to the technical field of part forming, in particular to an expansion pressure composite forming device for forming small round corner features of a thin-wall part.
Background
With the continuous development of manufacturing industry, more and more products are applied to high-tech devices, such as "ink mark" satellites, which need to be detected under extreme conditions of vacuum, large temperature difference, high radiation and the like in outer space. In this case, it is required that the product has extremely high quality, and the complexity of the product used in these devices is often high, and some thin-walled parts having local small rounded corner features are used in large quantities.
Chinese patent publication No.: CN107755511a discloses a bulging composite forming method aiming at the characteristic of small round corners of thin-wall parts. The method comprises the steps of preforming and final forming, wherein the preforming is passive liquid filling deep drawing, and the height of a formed part is slightly higher than that of a final actual part; the preformed rounded corners are also larger than the final small rounded corners. The final forming is expansion-pressure composite forming, the preformed part is placed upside down, high-pressure liquid is arranged below the part, a male die with the characteristic of a final small round corner is arranged above the preformed part, the male die descends in the forming process and simultaneously pressurizes a liquid chamber, and the small round corner is formed by expansion-pressure under the matching action of the expansion pressure of the liquid chamber and the back pressure speed of the male die; therefore, according to the expansion pressure composite forming method aiming at the small fillet characteristics of the thin-wall part, in the single forming process of the preforming and final forming processes, the extrusion liquid is injected below the part to be processed and is extruded above the part to be processed by using the die, so that the die and the extrusion liquid can only extrude one side of the part to be processed in the single forming process, and the part is required to be overturned, so that uneven stress of the part to be processed in the forming process is easy to cause, the forming quality of the part is poor, and the forming efficiency of the part is low.
Disclosure of Invention
Therefore, the utility model provides an expansion pressure composite forming device for forming small round corner features of a thin-wall part. The method is used for solving the problems that a plurality of processes are needed to achieve the preset forming quality in the prior art, and the parts are easy to damage.
In order to achieve the above object, the present utility model provides an expansion composite forming device for forming small round corner features, comprising:
the split type blank holder is an annular part provided with a blank holder through hole and used for fixing a part to be processed at a corresponding position, and comprises an upper blank holder and a lower blank holder which are connected, wherein the upper blank holder is arranged on the upper part of the lower blank holder, and the inner wall of the upper blank holder, which is close to one side of the lower blank holder, is provided with a groove; the side wall of the lower blank holder is provided with an upper liquid inlet channel for conveying extrusion liquid to the blank holder through hole.
The preforming die is a cylindrical part, is positioned in the blank pressing through hole of the split type blank holder and is connected with a hydraulic press outside the device, and is used for extruding the part to be processed from top to bottom so as to perform preforming treatment on the part to be processed.
The support body is an annular part provided with a support through hole, is positioned on one side of the lower blank holder far away from the upper blank holder and is connected with the lower blank holder, and is matched with the lower blank holder to fix the part to be processed at a corresponding position; the side wall of the support body is provided with a lower liquid inlet channel for conveying extrusion liquid to the support through hole; the inner wall of the supporting through hole is provided with threads.
The final forming die is a cylindrical part, is positioned in the supporting through hole of the supporting body and is connected with a feeding device outside the device, and is used for feeding up and down so as to achieve the final forming treatment of the part to be processed; the side wall of the final forming die except for the small round corner feature is provided with threads.
Further, the expansion press composite forming device for forming the small round corner features of the thin-wall part further comprises an upper cover, wherein the upper cover is used for being arranged in the groove when the preformed die is not positioned in the blank pressing through hole so as to form a closed space with the blank pressing through hole in the lower blank pressing ring and the part to be processed.
Further, be provided with a plurality of sealing washer in being used for the fashioned of thin wall part small round angle characteristic's expanding pressure composite forming device, include:
the upper sealing ring is arranged on the inner wall of the inner pressing through hole of the lower pressing ring, which is close to one side end part of the upper pressing ring, and is used for being matched with the upper cover to seal the inner pressing through hole of the lower pressing ring;
and the lower sealing ring is arranged between the lower blank holder and the supporting body and is used for sealing the supporting through hole when the preforming die runs and sealing the blank pressing through hole in the lower blank holder when the final forming die runs.
Further, the diameter of the pre-forming die is smaller than the diameter of the blank pressing through hole; the diameter of the final forming die is smaller than that of the supporting through hole.
Further, the diameter of the preform mold is equal to the diameter of the final molding mold.
Further, the round angle is arranged at the bottom edge of the pre-forming die, the top of the final forming die is provided with a dent, and the round angle is arranged at the bottom of the dent and the side wall.
Further, the threads of the support body are matched with the threads of the final forming die.
Further, the upper blank holder and the lower blank holder are concentrically arranged.
Further, the inner diameter and the outer diameter of the upper blank holder are equal to each other, the outer diameter of the upper blank holder is equal to the outer diameter of the lower blank holder, and the height of the upper blank holder is smaller than that of the lower blank holder.
Further, the inner diameter of the upper sealing ring is equal to the inner diameter of the blank pressing through hole, the inner diameter of the lower sealing ring is larger than the inner diameter of the blank pressing through hole, and the outer diameter of the lower sealing ring is smaller than the outer diameter of the supporting body.
Compared with the prior art, the utility model has the beneficial effects that the integrated forming device is adopted to perform the passive liquid filling deep drawing and finally form the active hydraulic bulging combined rigid back pressure through the two-pass hydraulic forming process. The method can fully exert the plasticity of the material, and ensures that the formed small round corners have uniform wall thickness distribution, good surface quality and high forming precision. The forming process has simple process, high efficiency and low cost, and is suitable for mass production. Meanwhile, the utility model greatly widens the range of the fillet of the plate part which can be formed by the hydraulic forming technology and the application range of the hydraulic forming technology, has wide prospect, and improves the product quality and the forming efficiency of the device.
Further, the expansion composite forming device for forming the small round corner features of the parts realizes extrusion of different sides of the parts to be processed in two working procedures, and improves the product quality and the forming efficiency of the device.
Further, the upper cover can form a closed space with the split type blank holder, the part to be processed, the upper sealing ring and the lower sealing ring after being installed, so that the tightness of the expansion composite forming device for forming the small round corner features of the thin-wall part is improved, and meanwhile, the product quality and the forming efficiency of the device are improved.
Further, the sealing performance of the expansion pressure composite forming device for forming the small round corner features of the thin-wall part is improved by the upper sealing ring and the lower sealing ring, and meanwhile, the product quality and the forming efficiency of the device are improved.
Further, the final forming die is connected with the supporting body through matched threads, the external feeding device can control the final forming die to feed up and down through the threads, the setting of the threads improves the accuracy of the external feeding device in controlling the up and down feeding of the final forming die, the matched threads improve the tightness of the expansion composite forming device for forming the small round corner features of the parts, and meanwhile, the product quality and the forming efficiency of the forming device are improved.
Further, the pre-forming die can work simultaneously with the lower liquid inlet channel, and the final forming die can work simultaneously with the upper liquid inlet channel, so that the product quality and the forming efficiency of the forming device are effectively improved.
Further, the expansion composite forming device for forming the small round corner features of the parts can finish the steps of preforming and final forming by using the same equipment, so that the integral forming of the equipment is realized, the forming process is simplified, and meanwhile, the product quality and the forming efficiency of the forming device are improved.
Drawings
FIG. 1 is a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model;
FIG. 2 is a top view of a molding apparatus according to an embodiment of the present utility model;
FIG. 3 is a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model when a preform die is used to extrude a part to be processed;
FIG. 4 is a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model prior to extrusion of a part to be processed using a final mold;
fig. 5 is a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model when a part to be processed is extruded using a final molding die.
In the figure: the device comprises a preforming die 1, an upper blank holder 2, an upper sealing ring 3, a lower blank holder 4, a lower sealing ring 5, a supporting body 6, a final forming die 7, an upper cover 8, an upper liquid inlet channel 9, a part to be processed 10, a lower liquid inlet channel 11, a lower liquid chamber 12 and an upper liquid chamber 13.
Detailed Description
In order that the objects and advantages of the utility model will become more apparent, the utility model will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, which are a side cross-sectional view and a top view of a forming device according to an embodiment of the present utility model, the expansion-compression composite forming device for forming small rounded features of a thin-walled part according to the present utility model includes:
the split type blank holder is an annular part provided with a blank holder through hole and used for fixing a part 10 to be processed at a corresponding position, and comprises an upper blank holder 2 and a lower blank holder 4 which are connected, wherein the upper blank holder 2 is arranged at the upper part of the lower blank holder 4, and the inner wall of one side of the upper blank holder 2, which is close to the lower blank holder 4, is provided with a groove; an upper liquid inlet channel 9 is formed in the side wall of the lower blank holder 4 and used for conveying extrusion liquid to the blank holder through hole;
the preforming die 1 is a cylindrical part, and the preforming die 1 is positioned in the blank pressing through hole of the split type blank holder and connected with a hydraulic press outside the device, and is used for extruding the part 10 to be processed from top to bottom so as to perform preforming treatment on the part 10 to be processed;
the support body 6 is an annular part provided with a support through hole, and the support body 6 is positioned at one side of the lower blank holder far away from the upper blank holder 2 and connected with the lower blank holder 4, so as to be matched with the lower blank holder 4 to fix the part 10 to be processed at a corresponding position; the side wall of the support body 6 is provided with a lower liquid inlet channel 11 for conveying extrusion liquid to the support through hole; the inner wall of the supporting through hole is provided with threads.
Specifically, the expansion pressure composite forming device for forming the small round angle characteristic of the thin-wall part is also provided with a plurality of sealing rings, and comprises:
an upper seal ring 3 which is arranged on the inner wall of the inner pressure edge through hole of the lower pressure edge ring 4, which is close to one side end part of the upper pressure edge ring 2;
and a lower sealing ring 5, which is arranged between the lower blank holder 4 and the supporting body 6, and is used for sealing the supporting through hole when the preforming die 1 operates and sealing the blank pressing through hole in the lower blank holder when the final forming die 7 operates.
Referring to fig. 4, which is a side sectional view of the forming device of the embodiment of the present utility model before the forming device uses the final forming die to extrude the part to be processed, the expansion-compression composite forming device for forming the small round corner feature of the thin-wall part of the present utility model further includes:
the final forming die 7 is a cylindrical part, and the final forming die 7 is positioned in the supporting through hole of the supporting body 6 and connected with a feeding device outside the device for feeding up and down so as to achieve the final forming treatment of the part 10 to be processed; the side walls of the final forming die 7, except at the small fillet feature, are threaded.
Specifically, the expansion press composite forming device for forming the small fillet feature of the thin-walled part comprises an upper cover 8, which is arranged in the groove when the pre-forming die 1 is not positioned in the blank pressing through hole so as to form a closed space with the blank pressing through hole in the lower blank holder 4 and the part to be processed 10.
Specifically, the diameter of the preforming die 1 is smaller than the diameter of the blank pressing through hole; the diameter of the final forming die 7 is smaller than the diameter of the supporting through hole.
Specifically, the diameter of the preform mold 1 is equal to the diameter of the final molding mold 7.
Specifically, the round angle is offered at preforming mould 1 bottom edge, the end forming die 7 top is equipped with sunken and sunken bottom and lateral wall have offered the round angle.
Specifically, the threads of the support body 6 match the threads of the final forming die 7.
Specifically, the upper blank holder 2 and the lower blank holder 4 are concentrically arranged.
Specifically, the inner diameters of the upper blank holder 2 and the lower blank holder 4 are equal, the outer diameters of the upper blank holder 2 and the lower blank holder 4 are equal, and the height of the upper blank holder 2 is smaller than that of the lower blank holder 4.
Specifically, the inner diameter of the upper sealing ring 3 is equal to the inner diameter of the blank pressing through hole, the inner diameter of the lower sealing ring 5 is larger than the inner diameter of the blank pressing through hole, and the outer diameter of the lower sealing ring is smaller than the outer diameter of the supporting body 6.
Referring to fig. 3, a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model when the part to be processed is extruded by a pre-molding die is shown.
According to the expansion pressure composite forming device for forming the small round corner features of the thin-wall part, before operation, a part 10 to be processed is placed between the split type blank holder and the supporting body 6, after the pre-forming die 1 is installed, liquid is filled into the lower liquid chamber 12 through the lower liquid inlet channel 11 on the supporting body 6 until the liquid surface rises to the round corner edge of the lower liquid chamber 12, but does not overflow from the round corner edge of the lower liquid chamber 12. A titanium alloy sheet with the thickness of 2mm is selected as a part 10 to be processed, the part 10 to be processed is placed on the lower liquid chamber 12, the part 10 is positioned by an external positioning device, the split type blank holder descends, and the tightness of the lower liquid chamber 12 is ensured by virtue of the lower sealing ring 5. The preforming die 1 descends at a set speed, meanwhile extrusion liquid is continuously injected into the liquid-down chamber 12 through the liquid-in channel 11, so that hydraulic pressure is applied to the liquid-down chamber 12, the part 10 to be processed is abutted against the preforming die 1 under the action of high-pressure liquid, elastoplastic deformation occurs, and the preforming shape is formed.
Referring to fig. 5, a side cross-sectional view of a molding apparatus according to an embodiment of the present utility model is shown when a final mold is used to press a part to be processed.
After the part 10 to be processed is preformed, the preformed mould 1 and the split type blank holder are lifted together, the upper cover 8 and the upper sealing ring 3 are installed to form an upper liquid chamber 13, liquid is filled into the upper liquid chamber 13 through the upper liquid inlet channel 9, high-pressure liquid is arranged above the part 10 to be processed, and the final forming mould 7 with small round corner features is arranged below the part 10 to be processed. The upper blank holder 2 is closed downwards, a 600kN blank holder force is applied, the upper sealing ring 3 and the lower sealing ring 5 seal the device, and the blank holder force presses the flange part of the preformed part onto the upper liquid chamber 13. After the final forming die 7 gradually approaches the surface of the part 10 to be processed through screw feeding, the final forming die continuously ascends to a certain position at a set speed, meanwhile, extrusion liquid is continuously injected into the upper liquid chamber 13 through the upper liquid inlet channel 9 on the lower blank holder 4, so that hydraulic pressure is applied to the upper liquid chamber 13, and the small round corners of the part 10 to be processed are formed by expanding and pressing under the matching action of the bulging pressure of the upper liquid chamber 13 and the back pressure speed of the die. And finally, stopping injecting extrusion liquid into the upper liquid inlet channel 9, discharging the internal pressure of the device through the liquid inlet channel 9, decompressing and opening the die, finally taking out the part with the small round corner feature, and cutting off the redundant process supplement surface to obtain the complete part.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will be within the scope of the present utility model.
The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the utility model; various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. A be used for little fillet characteristic fashioned bulge compression composite forming device of thin wall part, its characterized in that includes:
the split type blank holder is an annular part provided with a blank holder through hole and used for fixing a part to be processed at a corresponding position, and comprises an upper blank holder and a lower blank holder which are connected, wherein the upper blank holder is arranged on the upper part of the lower blank holder, and the inner wall of the upper blank holder, which is close to one side of the lower blank holder, is provided with a groove; an upper liquid inlet channel is formed in the side wall of the lower blank holder and used for conveying extrusion liquid to the blank holder through hole;
the preforming die is a cylindrical part, is positioned in the blank pressing through hole of the split type blank holder and is connected with a hydraulic press outside the device, and is used for extruding the part to be processed from top to bottom so as to perform preforming treatment on the part to be processed;
the support body is an annular part provided with a support through hole, is positioned on one side of the lower blank holder far away from the upper blank holder and is connected with the lower blank holder, and is matched with the lower blank holder to fix the part to be processed at a corresponding position; the side wall of the support body is provided with a lower liquid inlet channel for conveying extrusion liquid to the support through hole; the inner wall of the supporting through hole is provided with threads;
the final forming die is a cylindrical part, is positioned in the supporting through hole of the supporting body and is connected with a feeding device outside the device, and is used for feeding up and down so as to achieve the final forming treatment of the part to be processed; threads are formed on the side wall of the final forming die except for the small round corner feature;
the diameter of the preformed die is smaller than that of the blank pressing through hole; the diameter of the final forming die is smaller than that of the supporting through hole;
the diameter of the pre-forming die is equal to the diameter of the final forming die.
2. The expansion composite forming device for forming small round angle features of thin wall parts according to claim 1, further comprising an upper cover for being arranged in the groove to form a closed space with the blank pressing through hole in the lower blank pressing ring and the part to be processed when the pre-forming die is not arranged in the blank pressing through hole.
3. The expansion composite forming device for forming small round corner features of thin-walled parts according to claim 2, wherein a plurality of sealing rings are further provided in the device, comprising:
the upper sealing ring is arranged on the inner wall of the inner pressing through hole of the lower pressing ring, which is close to one side end part of the upper pressing ring, and is used for being matched with the upper cover to seal the inner pressing through hole of the lower pressing ring;
and the lower sealing ring is arranged between the lower blank holder and the supporting body and is used for sealing the supporting through hole when the preforming die runs and sealing the blank pressing through hole in the lower blank holder when the final forming die runs.
4. The expansion composite forming device for forming small round corner features of thin-wall parts according to claim 3, wherein round corners are formed at the bottom edge of the pre-forming die, the top of the final forming die is provided with a concave portion, and round corners are formed at the bottom of the concave portion and the side walls.
5. The expansion composite forming device for forming small round corner features of thin wall parts according to claim 4, wherein the threads of the support body are matched with the threads of the final forming die.
6. The expansion composite forming device for forming small round corner features of thin-walled parts according to claim 5, wherein the upper blank holder and the lower blank holder are concentrically arranged.
7. The expansion composite forming device for forming small round corner features of thin-wall parts according to claim 6, wherein the inner diameter of the upper blank holder is equal to that of the lower blank holder, the outer diameters of the upper blank holder and the lower blank holder are equal, and the height of the upper blank holder is smaller than that of the lower blank holder.
8. The expansion composite forming device for forming small round corner features of thin-walled parts according to claim 7, wherein the inner diameter of the upper sealing ring is equal to the inner diameter of the blank-holding through hole, the inner diameter of the lower sealing ring is larger than the inner diameter of the blank-holding through hole, and the outer diameter of the lower sealing ring is smaller than the outer diameter of the supporting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222004959.5U CN218946055U (en) | 2022-08-01 | 2022-08-01 | Expansion-pressing composite forming device for forming small round corner features of thin-wall part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222004959.5U CN218946055U (en) | 2022-08-01 | 2022-08-01 | Expansion-pressing composite forming device for forming small round corner features of thin-wall part |
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| Publication Number | Publication Date |
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| CN218946055U true CN218946055U (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222004959.5U Active CN218946055U (en) | 2022-08-01 | 2022-08-01 | Expansion-pressing composite forming device for forming small round corner features of thin-wall part |
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| CN (1) | CN218946055U (en) |
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2022
- 2022-08-01 CN CN202222004959.5U patent/CN218946055U/en active Active
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