Rotor die forging die
By designing a rotor forging die and utilizing the die cavity structure and positioning mechanism of inclined blind holes and through holes, the problems of low finished product accuracy and raw material utilization in the forging of flywheel energy storage rotors are solved, and efficient and low-cost rotor production is achieved.
Patent Information
- Application Number
- CN202422983693.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In the prior art, the forging process of flywheel energy storage rotors produces finished products with low size and shape accuracy and low raw material utilization, resulting in high production costs and poor material shape adaptability.
A rotor forging die was designed, consisting of an upper die and a lower die. The blind holes and through holes were arranged obliquely to form a die cavity. The die was made of 42CrMo4 alloy steel and was heat-treated. A positioning mechanism was equipped to ensure that the blank was quickly formed and accurately positioned in the die cavity.
The dimensional accuracy of the finished product in the forging process is improved, processing allowance is reduced, raw material waste and production costs are reduced, and production efficiency and forming quality are improved.
Smart Images
Figure CN223441004U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of die forging, especially to rotor die forging mould. BACKGROUND
[0002] The flywheel energy storage rotor is the core component in the flywheel energy storage system, and its main function is to store and release energy.
[0003] The production process of the rotor includes forging, heat treatment and machining. The finished product size and shape accuracy produced in the forging process are relatively low, and a large amount of leftover material needs to be removed, resulting in low raw material utilization. In addition, the adaptability of forging to materials and shapes is weak, which further increases the excess amount of finished products produced in the forging process, reduces the utilization of raw materials and increases production costs.
[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY
[0005] In view of the shortcomings of the prior art, the purpose of the present utility model is to provide a rotor die forging die to improve the processing effect of the forging process in the production of the rotor.
[0006] The technical solution of the utility model is as follows:
[0007] The rotor die forging die comprises an upper die and a lower die; the upper die is provided with a blind hole downward; the hole wall of the blind hole is inclinedly arranged, the hole diameter of the hole mouth of the blind hole is larger than the hole diameter of the hole bottom of the blind hole; the lower die is arranged below the upper die, a through hole is vertically arranged on the lower die; the hole wall of the through hole is inclinedly arranged, the hole diameter of the hole mouth of the upper part of the through hole is larger than the hole diameter of the hole mouth of the lower part of the through hole; wherein the lower surface of the upper die and the upper surface of the lower die are flat surfaces; the hole wall of the blind hole, the lower surface of the upper die, the upper surface of the lower die and the hole wall of the through hole form a die chamber; a blank is arranged in the die chamber and is forged into a shape.
[0008] A further technical solution is that the inclined angle of the hole wall of the blind hole and the hole wall of the through hole is between 5° and 10°.
[0009] A further technical solution is that a circular arc angle is arranged at the hole mouth of the blind hole and the upper hole mouth of the through hole.
[0010] A further technical solution is that a circular arc angle is arranged between the hole wall of the blind hole and the hole bottom of the blind hole.
[0011] A further technical solution is that the outer diameter of the upper die and the lower die is smaller than the outer diameter of the blank.
[0012] Further, the material of the upper die and the lower die is 42CrMo4 alloy steel, and the heat treatment is quenching at 930 DEG C and tempering at 620 DEG C.
[0013] Further, the positioning mechanism comprises a left positioning block, a right positioning block and a positioning rod, the positioning rod is arranged on the left positioning block and the right positioning block, the left positioning block and the right positioning block are spliced and arranged on the lower die, and the positioning rod limits the transverse position of the blank when the blank is placed on the lower die.
[0014] Further, the positioning rod is arranged in three, and the three positioning rods are uniformly arranged around the center circumference of the lower die.
[0015] Further, the left positioning block is provided with an upper extension part, the upper extension part is provided with an upper hook part, the right positioning block is provided with a lower extension part, the lower extension part is provided with a lower hook part, the upper hook part is arranged in the gap between the lower hook part and the right positioning block when the left positioning block and the right positioning block are spliced, and the lower hook part is arranged in the gap between the upper hook part and the left positioning block.
[0016] The beneficial technical effects of the utility model are as follows:
[0017] (1) the rotor die forging die in the utility model, the blind hole is arranged on the upper die, and the through hole is arranged on the lower die. The lower surface of the upper die, the blind hole wall, the upper surface of the lower die and the through hole wall are combined to form a die chamber, and the internal shape of the die chamber is arranged according to the contour of the rotor. When the rotor is produced, the blank is arranged in the die chamber and is forged by the pressure equipment, and is quickly formed along the die chamber. Since the internal shape of the die chamber is arranged according to the rotor hub, the size of the forged piece is accurate, the machining allowance is reduced, thereby saving raw materials and reducing production cost. And the blank is forged in the die chamber, and only needs to be clamped and forged, so that the operation is simple, the labor intensity is low, and the production efficiency is high.
[0018] (2) further, the hole wall of the blind hole and the through hole is inclined, so that the workpiece after forming is tightly attached to the surface of the die, the friction between the workpiece and the die is reduced, and the workpiece after forming is more easily separated from the die.
[0019] (3) further, the positioning mechanism is arranged. When the blank is placed on the lower die, the position between the blank and the lower die is quickly positioned by the positioning mechanism, so that the blank and the lower die center are aligned, the raw materials are fully utilized, and the waste of raw materials is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The vertical section structure schematic view of the rotor die forging die in the embodiment two of the utility model is shown.
[0021] Figure 2 The vertical section structure schematic view of the rotor die forging die in the embodiment two of the utility model is shown.
[0022] Figure 3 The splicing structure schematic view of the left positioning block and the right positioning block in the embodiment two of the utility model is shown.
[0023] Markings in the drawings:
[0024] 1, upper die; 11, blind hole; 12, arc angle; 2, lower die; 21, through hole; 3, die chamber; 4, positioning mechanism; 41, left positioning block; 411, upper extension part; 412, upper hook part; 42, right positioning block; 421, lower extension part; 422, lower hook part; 43, positioning rod; 5, blank. DETAILED DESCRIPTION
[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It should be known that the structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limiting conditions of the implementation of the utility model, so they do not have the technical substantive meaning, any modification of structure, change of proportion relationship or adjustment of size, as long as it does not affect the effect and purpose that can be produced by the utility model, should still fall within the scope of the technical content disclosed by the utility model.
[0026] In the description of the utility model, the orientation or positional relationship indicated by the limiting terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.
[0027] Embodiment one
[0028] Figure 1 The vertical section structure schematic view of the rotor die forging die in the embodiment one of the utility model is shown. Please refer to Figure 1The rotor die forging die includes an upper die 1 and a lower die 2. The upper die 1 is downwardly provided with a blind hole 11. The hole wall of the blind hole 11 is obliquely arranged, and the hole diameter of the hole bottom of the blind hole 11 is larger than the hole diameter of the hole bottom of the blind hole 11. The lower die 2 is arranged below the upper die 1, and a through hole 21 is vertically arranged on the lower die 2. The hole wall of the through hole 21 is obliquely arranged, and the hole diameter of the upper part of the through hole 21 is larger than the hole diameter of the lower part of the through hole 21. The oblique angle of the hole wall of the blind hole 11 and the through hole 21 is between 5° and 10°. The oblique arrangement of the hole wall of the blind hole 11 and the through hole 21 avoids the tight adhesion of the formed workpiece to the surface of the die, reduces the friction between the workpiece and the die, and makes the formed workpiece more easily separated from the die.
[0029] The lower surface of the upper die 1 and the upper surface of the lower die 2 are flat surfaces. The hole wall of the blind hole 11, the lower surface of the upper die 1, the upper surface of the lower die 2 and the hole wall of the through hole 21 form a die chamber 3, and the internal shape of the die chamber 3 is arranged according to the contour of the rotor. The blank 5 is arranged in the die chamber 3 and forged. When producing the rotor, the blank 5 is arranged in the die chamber 3 and forged by the pressure equipment, and quickly formed along the die chamber 3. Since the internal shape of the die chamber 3 is arranged according to the rotor hub, the size of the forged workpiece is accurate, the machining allowance is reduced, the raw material is saved, and the production cost is reduced. Moreover, the blank 5 is forged in the die chamber 3, and only needs to be clamped and forged, which is simple in operation, low in labor intensity and high in production efficiency.
[0030] Please refer to Figure 1 The hole wall of the blind hole 11 and the hole bottom of the blind hole 11 are provided with a circular corner 12. The hole wall of the blind hole 11 and the hole bottom of the blind hole 11 are provided with a circular corner 12. The circular corner 12 can effectively reduce the stress concentration of the die in the use process, help the part to be more smoothly separated from the die, reduce the friction during the forming of the rotor, reduce the demolding force, and avoid the part from appearing and damaging during demolding.
[0031] Preferably, the outer diameter of the upper die 1 and the lower die 2 is smaller than the outer diameter of the blank 5. It is convenient for the rotor in spinning, round forging, improves the coaxiality of the rotor after forming, and improves the forming quality of the rotor.
[0032] More preferably, the material of the upper die 1 and the lower die 2 adopts 42CrMo4 alloy steel, and is quenched at 930℃ and tempered at 620℃. The hardness and toughness of the upper die 1 and the lower die 2 are guaranteed, and the service life of the upper die 1 and the lower die 2 is prolonged.
[0033] The specific working process of the embodiment is as follows:
[0034] The lower die 2 is arranged on the installation plane, and the blank 5 is placed on the lower die 2. The blank 5 is struck by the pressure equipment, and the blank 5 is deformed along the die cavity 3 on the lower die 2. The upper die 1 is arranged above the blank 5, and the blind hole 11 and the through hole 21 are aligned. The blank 5 is continuously struck by the pressure equipment, and the blank 5 is extended and formed along the die cavity 3. Until the blank 5 fills the die cavity 3, the blank 5 is forged to the preset process size, and the forging of the blank 5 is completed.
[0035] Embodiment two
[0036] Figure 2 The vertical section structure schematic view of the rotor die forging die in the embodiment two of the utility model is shown. Figure 3 The splicing structure schematic view of the left positioning block and the right positioning block in the embodiment two of the utility model is shown. Please refer to Figure 2 And Figure 3 Based on the embodiment one, the embodiment two discloses a rotor die forging die, which further comprises a positioning mechanism 4, the positioning mechanism 4 comprises a left positioning block 41, a right positioning block 42 and a positioning rod 43. The left positioning block 41 and the right positioning block 42 are arranged separately, so that the positioning mechanism 4 can be sleeved on the lower die 2. The positioning rod 43 is arranged on the left positioning block 41 and the right positioning block 42. The left positioning block 41 and the right positioning block 42 are spliced and sleeved on the lower die 2. When the blank 5 is placed on the lower die 2, the positioning rod 43 limits the transverse position of the blank 5. The position between the blank 5 and the lower die 2 is quickly positioned through the positioning mechanism 4, so that the center of the blank 5 and the lower die 2 is aligned, the raw material is fully utilized, and the waste of raw materials is reduced.
[0037] Preferably, the positioning rod 43 is provided with three positioning rods in total, and the three positioning rods 43 are uniformly arranged around the center circumference of the lower die 2. The position between the blank 5 and the lower die 2 is positioned by the three positioning rods 43.
[0038] More preferably, the left positioning block 41 is provided with an upper extension part 411 extending transversely. The upper extension part 411 is provided with an upper hook part 412 extending downward. The right positioning block 42 is provided with a lower extension part 421 extending transversely, and the lower extension part 421 is provided with a lower hook part 422 extending upward. When the left positioning block 41 and the right positioning block 42 are spliced, the upper hook part 412 extends into the gap between the lower hook part 422 and the right positioning block 42. The lower hook part 422 extends into the gap between the upper hook part 412 and the left positioning block 41. The upper hook part 412 and the lower hook part 422 are hooked, so as to limit the position between the left positioning block 41 and the right positioning block 42, avoid the separation of the left positioning block 41 and the right positioning block 42 when the blank 5 is positioned by the positioning rod 43, and guarantee the positioning effect of the positioning mechanism 4.
[0039] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradiction, it should be considered as the scope of the description.
[0040] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the utility model concept, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. Rotor forging die, characterized in that: The rotor forging die comprises an upper die and a lower die; The upper mold is provided with a blind hole downward; the hole wall of the blind hole is inclined, and the hole diameter of the blind hole is larger than the hole bottom diameter of the blind hole; The lower mold is arranged below the upper mold, and a through hole is vertically opened on the lower mold; the hole wall of the through hole is arranged obliquely, and the hole diameter of the upper part of the through hole is larger than the hole diameter of the lower part of the through hole; The lower surface of the upper mold and the upper surface of the lower mold are flat surfaces; the hole wall of the blind hole, the lower surface of the upper mold, the upper surface of the lower mold and the hole wall of the through hole together form a die cavity; the blank is set in the die cavity and forged.
2. The rotor forging die according to claim 1, wherein: The inclination angles of the hole walls of the blind hole and the through hole are between 5° and 10°.
3. The rotor forging die according to claim 1, wherein: The opening of the blind hole and the upper opening of the through hole are both provided with arc angles.
4. The rotor forging die according to claim 1, wherein: An arc angle is provided between the hole wall of the blind hole and the hole bottom of the blind hole.
5. The rotor forging die according to claim 1, wherein: The outer diameters of the upper mold and the lower mold are smaller than the outer diameter of the blank.
6. The rotor forging die according to claim 1, wherein: The upper die and the lower die are made of 42CrMo4 alloy steel and are subjected to 930° C. quenching and 620° C. tempering heat treatment.
7. The rotor forging die according to claim 1, wherein: It also includes a positioning mechanism, which includes a left positioning block, a right positioning block and a positioning rod; the positioning rod is arranged on the left positioning block and the right positioning block; the left positioning block and the right positioning block are spliced and sleeved on the lower mold; when the blank is placed on the lower mold, the positioning rod limits the lateral position of the blank.
8. The rotor forging die according to claim 7, wherein: There are three positioning rods in total, and the three positioning rods are evenly arranged around the central circumference of the lower mold.
9. The rotor forging die according to claim 7, wherein: The left positioning block is extended laterally to form an upper extension portion; the upper extension portion is extended downwardly to form an upper hook portion; the right positioning block is extended laterally to form a lower extension portion, and the lower extension portion is extended upwardly to form a lower hook portion; when the left positioning block and the right positioning block are spliced, the upper hook portion extends into the gap between the lower hook portion and the right positioning block; the lower hook portion extends into the gap between the upper hook portion and the left positioning block.