CN119175309A - Forming die and method for annular sheet metal part with groove - Google Patents
Forming die and method for annular sheet metal part with groove Download PDFInfo
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- CN119175309A CN119175309A CN202411511575.XA CN202411511575A CN119175309A CN 119175309 A CN119175309 A CN 119175309A CN 202411511575 A CN202411511575 A CN 202411511575A CN 119175309 A CN119175309 A CN 119175309A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of sheet metal forming, in particular to a forming die and a forming method for an annular sheet metal part with a groove. The forming die comprises a lower die plate and an upper die plate, wherein a cone is arranged on the lower die plate, a plurality of guide strips are uniformly distributed on the cone, an expansion block is slidably arranged on the guide strips, a top plate is placed on the top surface of the lower die plate, the bottom surface of the expansion block is abutted against the top surface of the top plate, a push rod hole is formed in the lower die plate, a T-shaped sliding block is slidably arranged in a T-shaped groove of the top plate, a concave module is arranged on the T-shaped sliding block, a reset spring is arranged between the top plate and the T-shaped sliding block and forms radial outward pulling force on the T-shaped sliding block, a wedge-shaped ring is arranged on the lower surface of the upper die plate, an annular body is arranged at the center of the lower surface of the upper die plate, a groove is formed in the outer conical surface of the expansion block, and a bulge is arranged on the inner conical surface of the concave module. After the part is formed, the wedge-shaped ring is separated from the concave module, and the concave module moves outwards under the action of the reset spring to be separated from the formed part.
Description
Technical Field
The invention relates to the technical field of sheet metal forming, in particular to a forming die and a forming method for an annular sheet metal part with a groove.
Background
Referring to fig. 1, a schematic structural view of a rib part on an aeroengine is shown, and the rib part has a conical tubular structure and is radially recessed in the middle to form a ring-shaped groove.
At present, the technological route for the reinforcing rib part is single-section molding, scribing the tire, welding the tire into a whole cone, and finally correcting and molding. Three sets of tools are put into the part for forming, namely a single-section forming die shown in fig. 2, a scribing type tire shown in fig. 3 and a forming correction die shown in fig. 4.
When the set of die is used for forming and correcting, a certain problem exists, and before the forming and correcting process, the part is welded into a cone by three sections of formed sheet bodies (shown in figure 5) and has three welding seams. When the die is in operation, the part is required to be placed into the die and then placed into the top plate, the upper die descends to press the expansion block to enable the expansion block to move radially, and the part is corrected and molded into the part with the required shape under the combined action of the die and the expansion block. After the work is finished, the upper die is lifted, the expansion block is lifted by the top plate to slowly and upwards fold along the cone until the part is completely separated from the expansion block, but the part is always embedded in the female die, the female die is designed into two halves, and the female die and the part are lifted out of the die simultaneously at the moment, the female die is separated left and right, and the part can be taken out. The single female die is calculated to have a weight of 16kg, 2 workers are required to operate simultaneously for taking the parts each time, and labor intensity is increased. The manual tool and the part taking operation are inconvenient, the working time and the working efficiency are prolonged, and the manual tool and the part taking operation are extremely unsafe. The part is formed by welding three molded parts before correction, the profile of the joint can generate staggered teeth, the profile cannot be completely consistent, and the molding quality of the corrected part can be affected.
Disclosure of Invention
The invention mainly aims to provide a forming die and a forming method for an annular sheet metal part with a groove, and aims to solve the technical problems.
In order to achieve the above purpose, on one hand, the invention provides a forming die of an annular sheet metal part with a groove, which comprises a lower die plate and an upper die plate, wherein a cone is arranged on the lower die plate, a plurality of guide strips are uniformly distributed on the cone, an expansion block is slidably arranged on each guide strip, a top plate is arranged on the top surface of the lower die plate, the bottom surface of the expansion block is abutted against the top surface of the top plate, a push rod hole is arranged on the lower die plate, a T-shaped sliding block is slidably arranged in a T-shaped groove of the top plate, a concave module is arranged on the T-shaped sliding block, a reset spring is arranged between the top plate and the T-shaped sliding block, the reset spring forms a radial outward pulling force on the T-shaped sliding block, a wedge ring is arranged on the lower surface of the upper die plate, an annular body is arranged at the center position of the lower surface of the upper die plate, a groove is arranged on the outer conical surface of the expansion block, a protrusion is arranged on the inner conical surface of the concave module, the lower end surface of the annular body abuts against the top surface of the expansion block, the expansion block is pushed to move downwards, and the inner conical surface of the wedge ring is matched with the outer peripheral surface of the concave module and pushes the concave module to move inwards.
Preferably, an adjusting plate is provided between the lower die plate and the top plate.
Preferably, the expansion block is provided with a chute with the taper of 15 degrees, the cross section of the chute is in a T-shaped form, the cross section of the guide bar is in a T-shaped form, and the guide bar is in sliding fit with the chute.
Preferably, the upper half part of the cone is a hexagonal pyramid, the lower half part of the cone is a stepped cylinder, a through groove is formed in the conical surface of the hexagonal pyramid, the guide strip is fixed in the through groove through a screw, an inclined sliding surface is arranged on the expansion block, and the sliding surface is in sliding fit with the conical surface of the hexagonal pyramid.
Preferably, the cone is inserted into the central through hole of the lower template through a stepped cylinder, the step surface of the stepped cylinder abuts against the top surface of the lower template, and the cone is connected with the lower template through a screw.
Preferably, the top plate is in an annular disc shape, the number of the T-shaped grooves is six, the T-shaped grooves are annularly and uniformly distributed on the top surface of the top plate, and each T-shaped groove is distributed along the radial direction of the top plate.
Preferably, the bottom surface of the concave module is provided with a clamping groove, the top of the T-shaped sliding block is inserted into the clamping groove of the concave module, the T-shaped sliding block is connected with the concave module through a screw, and the lower end surface of the concave module is in sliding fit with the top surface of the top plate.
Preferably, a first bolt is arranged on the top plate, a second bolt is arranged on the T-shaped sliding block, hanging holes are respectively formed in the first bolt and the second bolt, one end of the reset spring is hung on the hanging hole of the first bolt, and the other end of the reset spring is hung on the hanging hole of the second bolt.
On the other hand, the invention also provides a forming method of the annular sheet metal part with the groove, which adopts the forming die and comprises the following steps:
s1, preparing a woolen, wherein the woolen is of an annular cone cylinder structure;
S2, mounting the forming die on a hydraulic machine, wherein the hydraulic machine drives the upper die plate to ascend, and a top rod of the hydraulic machine jacks up the top plate after penetrating through a top rod hole of the lower die plate to drive the expansion block to slide upwards along the guide strip and move inwards in the radial direction;
S3, sleeving the woolen material on all the expansion blocks, and placing a pressing block on the top of each expansion block;
S4, driving the upper template to descend by using the hydraulic machine, and synchronously descending an ejector rod of the hydraulic machine to enable the top plate to descend, wherein the annular body of the upper template abuts against the pressing block and presses the expansion block downwards until the expansion block descends and moves radially outwards to tightly support the wool;
s5, driving the upper template to ascend by utilizing a hydraulic machine, and removing the pressing block;
S6, driving the upper die plate to descend by utilizing the hydraulic machine, synchronously descending the ejector rod of the hydraulic machine to enable the top plate to descend, enabling the annular body of the upper die plate to push the expansion block to descend and simultaneously enabling the expansion block to radially outwards move, and enabling the wedge-shaped ring to push the female die block to radially inwards move until the expansion block, the woolen material and the female die block are completely attached to each other, and extruding an annular groove on a part;
And S7, after pressure maintaining, the upper die plate is driven to ascend by using the hydraulic machine, the wedge-shaped ring is separated from the concave die block, the concave die block outwards moves to be separated from the formed part under the action of the reset spring, the top plate is jacked by using the ejector rod of the hydraulic machine, the expansion block is driven to slide upwards along the guide bar and simultaneously radially inwards move, and the formed part is separated from the expansion block, so that the formed part can be taken out.
Preferably, in the step S2, after the forming mold is mounted on the hydraulic press, the axial position height of the top plate needs to be adjusted so that the top surface of the top plate contacts with the lower end surface of the expansion block, and the adjusting method includes selecting an adjusting plate with a proper thickness, and placing the adjusting plate between the lower die plate and the top plate.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) The annular groove on the reinforcing rib part is integrally pressed and formed by the woolen adopting the annular cone-shaped structure in the forming die provided by the invention, so that the problem that the joint molded surface generates staggered teeth in the prior art by adopting a three-section welding mode is effectively solved. The annular cone blank is integrally formed, the molded part is stable in molded surface, high in size and position accuracy, and the molding efficiency is improved.
(2) After the part is molded by using the molding die provided by the invention, the upper die plate is driven to move upwards by using the hydraulic press, the wedge-shaped ring is separated from the concave die block, the concave die block moves outwards and is separated from the molded part under the action of the reset spring, the top plate is jacked by using the ejector rod of the hydraulic press, the expansion block is driven to move inwards in the radial direction while sliding upwards along the guide bar, and the molded part is separated from the expansion block, so that the molded part can be taken out. Compared with the molding correction die adopted in the prior art, the molded part is convenient to take out.
(3) By adopting the forming die and the forming die, the integral forming method of the annular sheet metal part with the groove is realized by means of the hydraulic press and the forming die in a bulging and extrusion mode, the mode simplifies the working procedure, solves the defects of complicated multi-procedure forming of the part, poor forming state of the part, inconvenient operation and the like, and only needs one set of tool to form the qualified part with stable molded surface at one time, thereby greatly shortening the part processing period, simplifying the operation of workers and ensuring safe and convenient material taking.
(4) The forming die provided by the invention has the advantages of simple structure and reliable operation, the molded surface of the parts formed in batches is stable, the dimensional and position accuracy meets the design requirements, and the product quality of the forming process is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a stiffener piece on an aircraft engine;
FIG. 2 is a schematic diagram of a single-stage forming die used in the prior art;
FIG. 3 is a schematic view of a streak tire structure employed in the prior art;
FIG. 4 is a schematic diagram of a molding calibration mold used in the prior art;
FIG. 5 is a schematic view of a third of the stiffener piece;
FIG. 6 is a schematic diagram of a molding die according to the present invention;
FIG. 7 is a partial top view of six expansion blocks in the forming die provided by the invention when the expansion blocks are uniformly distributed annularly;
FIG. 8 is a cross-sectional view A-A of FIG. 7;
FIG. 9 is a partial top view of six die blocks in the forming die provided by the invention when the six die blocks are uniformly distributed annularly;
FIG. 10 is a cross-sectional view B-B of FIG. 9;
FIG. 11 is a partial top view of a top plate in a forming die provided by the present invention;
FIG. 12 is a view in the direction A of FIG. 11;
FIG. 13 is a cross-sectional view of a wedge ring in a forming die provided by the present invention;
FIG. 14 is a top view of a cone in a forming die provided by the present invention;
FIG. 15 is a cross-sectional view taken along line C-C of FIG. 14;
Fig. 16 is a schematic view of the structure of the woolen according to the present invention.
The reference numerals are 1, a lower template, 1a, a top rod hole, 2, an adjusting plate, 3, a top plate, 3a, a T-shaped groove, 4, a T-shaped sliding block, 5, a female die block, 5a, a protrusion, 5b, a clamping groove, 6, an expanding block, 6a, a groove, 6b, a sliding groove, 6c, a sliding surface, 7, a cone, 7a, a hexagonal pyramid, 7b, a stepped cylinder, 7c, a through groove, 8, a guide bar, 9, a wedge ring, 10, an upper template, 10a, an annular body, 11, a pressing block, 12, a reset spring, 13, a first bolt, 14, a second bolt, 15 and a blank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 6 to 15, a forming die for a grooved annular sheet metal part provided by the invention comprises a lower die plate 1 and an upper die plate 10, wherein a cone 7 is arranged on the lower die plate 1, a plurality of guide strips 8 are uniformly distributed on the cone 7, an expanding block 6 is slidably arranged on each guide strip 8, a top plate 3 is arranged on the top surface of the lower die plate 1, the bottom surface of the expanding block 6 is abutted to the top surface of the top plate 3, a mandril hole 1a is arranged on the lower die plate 1, a T-shaped sliding block 4 is arranged in a T-shaped groove 3a of the top plate 3 in a sliding manner, a concave die block 5 is arranged on the T-shaped sliding block 4, a return spring 12 is arranged between the top plate 3 and the T-shaped sliding block 4, a wedge-shaped ring 9 is arranged on the lower surface of the upper die plate 10, an annular body 10a is integrally formed at the center position of the lower surface of the upper die plate 10, the lower end surface of the annular body 10a abuts against the top surface of the expanding block 6 when the expanding block 6 is matched, the annular body 6 moves downwards, and the concave die block 5 is matched with the concave die plate 5 in a radial direction.
As shown in fig. 6 to 8, the expansion blocks 6 are movable pieces, the number of the expansion blocks 6 is six, the expansion blocks 6 are installed on the cone 7 in a ring-shaped and uniformly distributed mode through six guide strips 8, a chute 6b with a taper of 15 degrees is formed in the expansion blocks 6, namely, an included angle between the chute 6b and the bottom surface of the expansion blocks 6 is 15 degrees, the cross section of the chute 6b is in a T-shaped, the cross section of the guide strip 8 is in a T-shaped, and the guide strips 8 are in sliding fit with the chute 6 b.
Referring to fig. 9 and 10, the female die blocks 5 are also movable members, the number of the female die blocks 5 is six, the female die blocks 5 are respectively installed on the top surface of the top plate 3 in a circular and uniform manner through the T-shaped sliding blocks 4, clamping grooves 5b are formed in the bottom surface of the female die blocks 5, the tops of the T-shaped sliding blocks 4 are inserted into the clamping grooves 5b of the female die blocks 5, the T-shaped sliding blocks 4 are connected with the female die blocks 5 through screws, and the lower end surfaces of the female die blocks 5 are in sliding fit with the top surface of the top plate 3.
As shown in fig. 6, 8 and 10, the outer cylindrical surface of the expansion block 6 and the inner conical surface of the concave die block 5 are respectively molded to be used for molding the blank 15, a groove 6a is arranged on the outer conical surface of the expansion block 6, a protrusion 5a is arranged on the inner conical surface of the concave die block 5, and when the blank 15 is molded, the annular groove on the part can be molded after the expansion block 5, the blank 15 and the concave die block 5 are completely attached.
In this embodiment, the wedge ring 9 has a torus structure and is connected to the upper die plate 10 by screws and pins. The inner conical surface of the wedge-shaped ring 9 is a conical surface of 15 degrees, the outer conical surface of the female die block 5 is a conical surface of 15 degrees, and when the die is assembled, the inner conical surface of the wedge-shaped ring 9 is matched with the outer peripheral surface of the female die block 5, so that the female die block 5 can be pushed to move inwards in the radial direction on the top surface of the top plate 3. When the die is opened, the wedge-shaped ring 9 and the female die block 5 are separated from each other, and the female die block 5 is retracted under the action of the return spring 12.
In the present embodiment, an adjusting plate 2 is provided between the lower die plate 1 and the top plate 3. By selecting an adjusting plate 2 with a proper thickness and placing the adjusting plate 2 between the lower template 1 and the top plate 3, the axial position height of the top plate 3 is adjusted so that the top surface of the top plate 3 is contacted with the lower end surface of the expansion block 6.
Referring to fig. 14 and 15, the upper half of the cone 7 is a hexagonal pyramid 7a, the lower half is a stepped cylinder 7b, the inclination angle of the pyramid surface of the hexagonal pyramid 7a is 15 °, a through groove 7c is formed in the pyramid surface of the hexagonal pyramid 7a, the guide bar 8 is fixed in the through groove 7c by a screw, an inclined sliding surface 6c is arranged on the expansion block 6, and the sliding surface 6c is in sliding fit with the pyramid surface of the hexagonal pyramid 7 a.
Referring to fig. 6 and 15, the cone 7 is inserted into the central through hole of the lower die plate 1 through a stepped cylinder 7b, the stepped surface of the stepped cylinder 7b abuts against the top surface of the lower die plate 1, and the cone 7 is connected with the lower die plate 1 through screws and pins.
The top plate 3 is in an annular disc shape as shown in fig. 12 and 13, the number of the T-shaped grooves 3a is six, the T-shaped grooves 3a are annularly and uniformly distributed on the top surface of the top plate 3, and each T-shaped groove 3a is distributed along the radial direction of the top plate 3. In the embodiment, the top plate 3 mainly comprises a sliding installation base serving as a concave module 5, and a top plate 3 can jack up an expansion block 6 when a top rod of a hydraulic machine passes through a top rod hole 1a of the lower die plate 1 and then jacks up the top plate 3.
Referring to fig. 6, a first bolt 13 is mounted on the top plate 3, a second bolt 14 is mounted on the T-shaped slider 4, hanging holes are formed in the first bolt 13 and the second bolt 14, one end of the return spring 12 is hung on the hanging hole of the first bolt 13, and the other end is hung on the hanging hole of the second bolt 14.
With reference to fig. 6 and 16, this embodiment further provides a method for forming a metal plate part with a groove, which adopts the above forming mold and includes the following steps:
s1, preparing a woolen 15, wherein the woolen 15 is of an annular cone structure.
S2, mounting the forming die on a hydraulic machine, wherein the hydraulic machine drives the upper die plate 10 to ascend, and a top rod of the hydraulic machine jacks up the top plate 3 after penetrating through a top rod hole 1a of the lower die plate 1 to drive the expansion block 6 to slide upwards along the guide strip 8 and simultaneously move inwards in a radial direction.
S3, sleeving all the expansion blocks 6 with the woolen 15, and placing the pressing block 11 on the top of the expansion block 6.
S4, driving the upper die plate 10 to descend by using a hydraulic machine, synchronously descending a push rod of the hydraulic machine to enable the top plate 3 to descend, abutting an annular body 10a of the upper die plate 10 against the pressing block 11 and pressing the expansion block 6 until the expansion block 6 descends and moves radially outwards to tightly support the woolen 15, wherein at the moment, the wedge-shaped ring 9 does not act on the concave die block 5, and the position of the concave die block 5 is kept unchanged. The woolen 15 is completely stuck on the expansion block 6, so that the woolen 15 is uniformly fed when being stressed under the condition of having a supporting surface, and the phenomena of deflection and abrupt change are avoided.
S5, driving the upper die plate 10 to ascend by utilizing a hydraulic machine, and removing the pressing block 11.
S6, driving the upper die plate 10 to descend by utilizing a hydraulic machine, synchronously descending a push rod of the hydraulic machine to enable the top plate 3 to descend, enabling the annular body 10a of the upper die plate 10 to push the expansion block 6 to descend and simultaneously enabling the expansion block 6 to radially outwards move, enabling the wedge-shaped ring 9 to push the concave module 5 to radially inwards move until the expansion block 5, the woolen material 15 and the concave module 5 are completely attached, and extruding an annular groove on a part.
And S7, after pressure maintaining, the upper die plate 10 is driven to ascend by using a hydraulic press, the wedge-shaped ring 9 is separated from the concave die block 5, the concave die block 5 moves outwards and is separated from the formed part under the action of the return spring 12, the top plate 3 is jacked by using a jacking rod of the hydraulic press, the expansion block 6 is driven to slide upwards along the guide strip 8 and move inwards in the radial direction, and the formed part is separated from the expansion block 6, so that the formed part can be taken out.
In the step S2, after the forming mold is mounted on the hydraulic press, the axial position of the top plate 3 needs to be adjusted so that the top surface of the top plate 3 contacts with the lower end surface of the expansion block 6, and the adjusting method is that an adjusting plate 2 with a proper thickness is selected, and the adjusting plate 2 is placed between the lower die plate 1 and the top plate 3.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The forming die for the annular sheet metal part with the groove is characterized by comprising a lower die plate (1) and an upper die plate (10), wherein a cone (7) is arranged on the lower die plate (1), a plurality of guide strips (8) are uniformly distributed on the cone (7), and an expansion block (6) is slidably arranged on each guide strip (8);
The lower die plate (1) is characterized in that a top plate (3) is arranged on the top surface of the lower die plate (1), the bottom surface of an expansion block (6) is abutted against the top surface of the top plate (3), a push rod hole (1 a) is formed in the lower die plate (1), a T-shaped sliding block (4) is arranged in a T-shaped groove (3 a) of the top plate (3) in a sliding mode, a concave module (5) is arranged on the T-shaped sliding block (4), a return spring (12) is arranged between the top plate (3) and the T-shaped sliding block (4), and the return spring (12) forms radial outward pulling force on the T-shaped sliding block (4);
The lower surface of the upper die plate (10) is provided with a wedge-shaped ring (9), an annular body (10 a) is arranged at the center of the lower surface of the upper die plate (10), a groove (6 a) is arranged on the outer conical surface of the expansion block (6), and a bulge (5 a) is arranged on the inner conical surface of the female die block (5);
When the die is assembled, the lower end face of the annular body (10 a) is abutted against the top face of the expansion block (6) to push the expansion block (6) to move downwards, and the inner conical surface of the wedge-shaped ring (9) is matched with the outer peripheral face of the female die block (5) and pushes the female die block (5) to move inwards in the radial direction.
2. The forming die for the annular sheet metal part with the groove, as set forth in claim 1, is characterized in that an adjusting plate (2) is arranged between the lower die plate (1) and the top plate (3).
3. The forming die for the annular sheet metal part with the groove is characterized in that a chute (6 b) with the taper of 15 degrees is formed in the expansion block (6), the cross section of the chute (6 b) is in a T shape, the cross section of the guide strip (8) is in a T shape, and the guide strip (8) is in sliding fit with the chute (6 b).
4. The forming die for the annular sheet metal part with the groove, as set forth in claim 1, is characterized in that the upper half part of the cone (7) is a hexagonal pyramid (7 a), the lower half part of the cone is a stepped cylinder (7 b), a through groove (7 c) is formed in the conical surface of the hexagonal pyramid (7 a), the guide strip (8) is fixed in the through groove (7 c) through a screw, an inclined sliding surface (6 c) is arranged on the expansion block (6), and the sliding surface (6 c) is in sliding fit with the conical surface of the hexagonal pyramid (7 a).
5. The forming die for the annular sheet metal part with the groove of claim 4, wherein the cone (7) is inserted into the central through hole of the lower die plate (1) through a stepped cylinder (7 b), the stepped surface of the stepped cylinder (7 b) abuts against the top surface of the lower die plate (1), and the cone (7) is connected with the lower die plate (1) through a screw.
6. The forming die for the annular sheet metal part with the groove, as set forth in claim 1, is characterized in that the top plate (3) is in an annular disc shape, the number of the T-shaped grooves (3 a) is six, the T-shaped grooves are annularly and uniformly distributed on the top surface of the top plate (3), and each T-shaped groove (3 a) is distributed along the radial direction of the top plate (3).
7. The forming die for the annular sheet metal part with the groove of claim 1 is characterized in that a clamping groove (5 b) is formed in the bottom surface of the female die block (5), the top of the T-shaped sliding block (4) is inserted into the clamping groove (5 b) of the female die block (5), the T-shaped sliding block (4) is connected with the female die block (5) through a screw, and the lower end surface of the female die block (5) is in sliding fit with the top surface of the top plate (3).
8. The forming die for the annular sheet metal part with the groove, as set forth in claim 1, is characterized in that a first bolt (13) is installed on the top plate (3), a second bolt (14) is installed on the T-shaped sliding block (4), hanging holes are formed in the first bolt (13) and the second bolt (14) respectively, one end of the return spring (12) is hung on the hanging hole of the first bolt (13), and the other end of the return spring is hung on the hanging hole of the second bolt (14).
9. A method for forming a grooved annular sheet metal part, characterized by using the forming die according to any one of claims 1 to 8, comprising the steps of:
s1, preparing a woolen (15), wherein the woolen (15) is of an annular cone structure;
S2, mounting the forming die on a hydraulic machine, wherein the hydraulic machine drives an upper die plate (10) to ascend, and a top rod of the hydraulic machine jacks up a top plate (3) after penetrating through a top rod hole (1 a) of a lower die plate (1) to drive an expansion block (6) to slide upwards along a guide strip (8) and simultaneously move inwards in a radial direction;
s3, sleeving all the expansion blocks (6) with the woolen (15), and placing a pressing block (11) on the top of the expansion block (6);
S4, driving the upper die plate (10) to descend by utilizing a hydraulic press, and synchronously descending an ejector rod of the hydraulic press to enable the top plate (3) to descend, wherein an annular body (10 a) of the upper die plate (10) is abutted against the pressing block (11) and presses down the expansion block (6) until the expansion block (6) descends and moves radially outwards to tightly support the woolen (15), and at the moment, the wedge-shaped ring (9) does not act on the concave die block (5), and the position of the concave die block (5) is kept unchanged;
S5, driving the upper die plate (10) to ascend by utilizing a hydraulic press, and removing the pressing block (11);
S6, driving the upper die plate (10) to descend by utilizing the hydraulic press, synchronously descending an ejector rod of the hydraulic press to enable the top plate (3) to descend, enabling the annular body (10 a) of the upper die plate (10) to push the expansion block (6) to descend and simultaneously move radially outwards, enabling the wedge-shaped ring (9) to push the concave die block (5) to move radially inwards until the expansion block (5), the woolen (15) and the concave die block (5) are completely attached, and extruding an annular groove on a part;
And S7, after pressure maintaining, driving the upper die plate (10) to ascend by using a hydraulic press, separating the wedge-shaped ring (9) from the concave die block (5), enabling the concave die block (5) to outwards move under the action of the reset spring (12) to be separated from the formed part, jacking the top plate (3) by using a push rod of the hydraulic press, driving the expansion block (6) to upwards slide along the guide strip (8) and simultaneously enabling the formed part to radially inwards move, separating the formed part from the expansion block (6), and taking out the formed part.
10. A method for forming a grooved annular sheet metal part according to claim 9, characterized in that in said step S2, after the forming die is mounted on the hydraulic press, the axial position height of the top plate (3) is adjusted so that the top surface of the top plate (3) contacts the lower end surface of the expansion block (6), the adjusting method is to select an adjusting plate (2) of a suitable thickness, and place the adjusting plate (2) between the lower die plate (1) and the top plate (3).
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| CN202411511575.XA CN119175309B (en) | 2024-10-28 | 2024-10-28 | Forming die and method for annular sheet metal part with groove |
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