CN113953432A - Forging die and forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches - Google Patents
Forging die and forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches Download PDFInfo
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- CN113953432A CN113953432A CN202111203838.7A CN202111203838A CN113953432A CN 113953432 A CN113953432 A CN 113953432A CN 202111203838 A CN202111203838 A CN 202111203838A CN 113953432 A CN113953432 A CN 113953432A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
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Abstract
The invention provides a forging die and a forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches, wherein the forging die comprises an upper die, a lower die outer frame and a lower die which are sequentially arranged from top to bottom; the core die is formed by splicing a plurality of core modules, the outer wall of each core module is provided with an anti-falling sliding block, and each anti-falling sliding block is in sliding fit with one anti-falling sliding groove. In the demolding process, the dumbbell-shaped step shaft blank is only required to be driven to move upwards, each core module of the core mold is not required to be disassembled, demolding is very convenient and fast, after demolding, the core modules automatically slide downwards under the action of gravity to form the core mold again, the core mold is not required to be installed again in next forging, the operation amount can be effectively reduced, and the forging efficiency is improved.
Description
Technical Field
The invention relates to the technical field of dumbbell-shaped step shaft blanks, in particular to a forging die and a forging method for quickly preparing dumbbell-shaped step shaft blanks in batches.
Background
The dumbbell-shaped part is a part with a small middle part and large two ends and is similar to a dumbbell in shape, and in the prior art, a round bar material is adopted to directly forge the part, so that great material waste is caused; the adoption of the dumbbell-shaped step shaft blank with the two large ends and the middle small diameter for forging is undoubtedly an excellent way for realizing the precision forming of the forge piece.
The dumbbell-shaped step shaft is special in structure, as shown in fig. 1, and is difficult to form by adopting a conventional upsetting process, one end of a bar stock is upset generally, and then the second end of the bar stock is upset, and the invention can refer to the invention patent with the application number of 201610454552.9.
When carrying out the upset with the second end of blank, need adopt dedicated mould, the mould generally includes mould and lower mould, second end warp when ensureing the upset in order to prevent, jackshaft and first end do not warp, need set up jackshaft protective sheath structure on last mould or lower mould, because forging both ends after forging are thick, it is middle thin, in order to take out the forging from the mould, jackshaft protective sheath structure can dismantle the concatenation by a plurality of parts and form generally, dismantle jackshaft protective sheath structure after forging the completion like this, make the main aspects of forging can pass through. For example, patent application No. 201610454552.9 discloses the use of a core to protect and position the intermediate shaft and the large end of the pre-forged form, and the core removal is separated after forging.
The core mould can adopt various detachable combination modes, but all need carry out artifical split when getting the piece, just can make the great end of forging diameter take out, lead to getting a inefficiency, when forging next time, need install the core mould again, need consume certain time, be unfavorable for realizing quick batch forging. The invention patent with the application number of 202110448161.7 discloses a necking die for automobile chassis parts, which can only be used for preparing thin-wall chassis parts, and the operation is not convenient enough because a forming core is jacked up and then the parts are placed when the die is used.
Disclosure of Invention
The invention aims to solve the technical problem of providing a forging die and a forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches, wherein a core die does not need to be installed manually before forging, and a forged piece can be taken out rapidly after forging, so that the forging efficiency is ensured.
The technical scheme adopted by the invention for solving the technical problems is as follows: the forging die for rapidly preparing the dumbbell-shaped step shaft blank in batches comprises an upper die, a lower die outer frame and a lower die which are sequentially arranged from top to bottom;
the lower die outer frame is internally provided with a positioning hole, the side wall of the positioning hole is obliquely arranged, the orifice at the upper end of the positioning hole is larger than the orifice at the lower end of the positioning hole, the side wall of the positioning hole is provided with a plurality of axially extending anti-falling chutes, a core die which is in sliding fit with the side wall of the positioning hole is arranged in the positioning hole, the core die is provided with a central positioning through hole, the core die is formed by splicing a plurality of core modules, the outer wall of each core module is provided with an anti-falling slide block, and each anti-falling slide block is positioned in one anti-falling chute and is in sliding fit with the anti-falling chute;
the end cavity is arranged between the upper die and the lower die outer frame, the lower die outer frame is arranged on the lower die in a lifting mode, and the lower die cavity is arranged on the lower die below the central positioning through hole.
Furthermore, the positioning hole and the core die are both in a truncated cone shape.
Furthermore, the end cavity is arranged on the upper surface of the lower die outer frame, the depth of the end cavity is equal to the length of the end of the blank, the upper die is a horizontal plate, the horizontal plate is naturally arranged on the upper surface of the lower die outer frame, and the positioning hole is located at the bottom of the end cavity.
Further, the lower surface of lower mould outrigger is provided with the guiding hole, the upper surface of lower mould is provided with the guide post, the upper end of guide post stretch into the guiding hole and with guide hole sliding fit, and be provided with the spring between the hole bottom of guide hole and the guide post.
Furthermore, the upper end orifice and the lower end orifice of the positioning hole are both rounded.
The forging method of the forging die for rapidly preparing dumbbell-shaped step shaft blanks in batches comprises the following steps
Upsetting one end of the bar stock to obtain a T-shaped intermediate blank;
the small end of the T-shaped intermediate blank downwards passes through the central positioning through hole and extends into the cavity of the lower die, the upper die is placed at the top of the outer frame of the lower die, the large end of the T-shaped intermediate blank is positioned in the end head cavity, then the upper die is pressed downwards, the outer frame of the lower die moves downwards, and meanwhile, the small end of the T-shaped intermediate blank is upset in the cavity of the lower die, so that a dumbbell-shaped step shaft blank is obtained;
and after forging, the upper die is taken down, the dumbbell-shaped step shaft blank is pulled to move upwards, when the lower end head of the dumbbell-shaped step shaft blank reaches the core die, the core die is pushed to slide upwards along the side wall of the positioning hole in an inclined mode, the diameter of the central positioning through hole is increased, when the diameter of the central positioning through hole is larger than the outer diameter of the lower end head of the dumbbell-shaped step shaft blank, the lower end head of the dumbbell-shaped step shaft blank penetrates through the central positioning through hole, demolding is completed, and the core die automatically slides downwards and resets under the action of gravity after demolding.
Further, the forging process of the T-shaped intermediate blank comprises the following steps: preparing a lower bobbin die, wherein a positioning blind hole is formed in the upper surface of the lower bobbin die; and placing one end of the bar material into the positioning blind hole, placing the upper end of the bar material outside the positioning blind hole, placing the upper bobbin die on the upper end of the bar material, and applying downward pressure to the upper bobbin die, so that the upper end of the bar material is upset to obtain the T-shaped intermediate blank.
And further, clamping the upper end of the dumbbell-shaped step shaft blank by using a clamp after forging and pulling the dumbbell-shaped step shaft blank to move upwards.
Further, when the lower die outer frame moves downwards, the spring is compressed, and after the dumbbell-shaped step shaft blank is formed, the spring extends to assist in pushing the dumbbell-shaped step shaft blank to move upwards.
The invention has the beneficial effects that: the hole wall of the positioning hole of the lower die outer frame is set to be an inclined plane, the anti-falling sliding groove is formed in the inclined plane, the anti-falling sliding block is arranged on the outer wall of each core module and is in sliding fit with the anti-falling sliding groove, so that the core die can slide upwards or downwards along the hole wall of the positioning hole, in the sliding process, the central positioning through hole of the core die becomes large or small, when the core die is demolded after forging, only the dumbbell-shaped step shaft blank needs to be driven to move upwards, the lower end of the dumbbell-shaped step shaft blank pushes the core die to slide upwards, and the central positioning through hole is gradually increased until the lower end of the dumbbell-shaped step shaft blank passes through the central positioning through hole. In the demolding process, the dumbbell-shaped step shaft blank is only required to be driven to move upwards, core modules of the core mold do not need to be detached, demolding is very convenient and fast, after demolding, the core modules automatically slide downwards under the action of gravity to form the core mold again, the core mold does not need to be installed again in next forging, the operation amount can be effectively reduced, the forging efficiency is improved, and rapid batch processing of the dumbbell-shaped step shaft blank can be realized.
Drawings
FIG. 1 is a schematic view of a dumbbell-shaped stepped shaft blank;
FIG. 2 is a schematic view of the formation of a T-shaped intermediate blank;
FIG. 3 is a schematic sectional front view of a forging die for a dumbbell-shaped stepped shaft blank;
FIG. 4 is a schematic top view of the core die mated with the lower die outer frame;
FIG. 5 is a schematic drawing of the forging of a dumbbell-shaped stepped shaft blank;
reference numerals: 2, a bobbin upper die; 3-T-shaped intermediate blank; 4-bobbin lower mould; 5, an upper die; 6-lower die outer frame; 61-end cavity; 63-positioning holes; 64-anti-drop chute; 65-a guide hole; 7, lower die; 71-lower mold cavity; 72-a guide post; 8, a spring; 9, forming a core mould; 91-a central positioning through hole; 92-anti-drop slide block.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 3 and 4, the forging die for rapidly and massively preparing the dumbbell-shaped step shaft blank comprises an upper die 5, a lower die outer frame 6 and a lower die 7 which are arranged from top to bottom in sequence.
The die is characterized in that a positioning hole 63 is formed in the lower die outer frame 6, the side wall of the positioning hole 63 is obliquely arranged, the upper end orifice of the positioning hole 63 is larger than the lower end orifice, a plurality of axially extending anti-falling chutes 64 are formed in the side wall of the positioning hole 63, a core die 9 in sliding fit with the side wall of the positioning hole 63 is arranged in the positioning hole 63, the core die 9 is provided with a central positioning through hole 91, the core die 9 is formed by splicing a plurality of core modules, an anti-falling slide block 92 is arranged on the outer wall of each core module, and each anti-falling slide block 92 is positioned in one anti-falling chute 64 and in sliding fit with the anti-falling chute 64.
A head cavity 61 is arranged between the upper die 5 and the lower die outer frame 6, the lower die outer frame 6 is arranged on the lower die 7 in a lifting manner, and a lower die cavity 71 is arranged on the lower die 7 below the central positioning through hole 91.
The lower die 7 and the lower die cavity 71 are used for forming the lower end of the dumbbell-shaped step shaft blank, and the shape and the size of the lower die cavity 71 are consistent with the size of the lower end of the dumbbell-shaped step shaft blank. The lower die outer frame 6 and the upper die 5 are used for positioning and protecting the upper end of the middle shaft and the upper end of the middle shaft of the T-shaped middle blank 3, so that the T-shaped middle blank 3 is kept stable in the forging process, and the upper end of the middle shaft of the T-shaped middle blank 3 are prevented from deforming in the subsequent forging process. While the lower end of the T-shaped intermediate billet 3 is being upset, the height of the T-shaped intermediate billet 3 is gradually reduced, and a lower die outer frame 6 is attached to a lower die 7 so as to be able to ascend and descend in order to accommodate the change in height.
Specifically, the upper part of the middle shaft of the T-shaped middle blank 3 is positioned and protected by the core die 9, the shape and the size of the central positioning through hole 91 are matched with the upper part of the middle shaft of the T-shaped middle blank 3, so that the small end of the T-shaped middle blank 3 can pass through the central positioning through hole 91, and a too large gap does not exist between the upper part of the middle shaft and the hole wall of the central positioning through hole 91.
Because the diameter of the central positioning through hole 91 is smaller than the diameter of the end of the dumbbell-shaped step shaft blank, in order to realize rapid demoulding, the positioning hole 63 is arranged in the middle of the lower die outer frame 6, the side wall of the positioning hole 63 is obliquely arranged, the orifice at the upper end of the positioning hole 63 is larger than the orifice at the lower end of the positioning hole 63, the side wall of the positioning hole 63 is provided with a plurality of anti-falling sliding chutes 64 extending axially, and the core modules of the core die 9 are in sliding fit with the anti-falling sliding chutes 64 through the anti-falling sliding blocks 92, so that each core module is in sliding fit with the side wall of the positioning hole 63. The anti-slip sliding groove 64 may be a dovetail groove or a groove body with a trapezoidal section, the width of the notch is smaller than the width of other parts, and the shape of the anti-slip sliding block 92 is adapted to the shape of the anti-slip sliding groove 64 to prevent the anti-slip sliding block 92 from being separated from the notch of the anti-slip sliding groove 64, so that the core module can stably slide up and down along the side wall of the positioning hole 63. The inclined side walls of the positioning holes 63 have an automatic positioning function, and the inclined side walls of the positioning holes 63 can stably support the core mold during forging, thereby ensuring the stability of the core mold 9. In addition, since the side walls of the positioning holes 63 are inclined, the opening area gradually increases from bottom to top, and when the core modules slide upward along the side walls of the positioning holes 63 in an inclined manner, the core modules are gradually separated, so that the diameter of the central positioning through hole 91 gradually increases until the tip of the dumbbell-shaped stepped shaft blank can pass through. By the setting of the anti-drop slider 92 in the lower portion of the core module, the degree of inclination of the side wall of the positioning hole 63 is satisfied: when the retaining slider 92 moves to the upper portion of the retaining slide groove 64 along with the core module, the diameter of the center positioning through-hole 91 is increased to be large enough for the end of the dumbbell-shaped stepped shaft blank to pass through. In order to prevent the core module from being out of position due to the separation of the separation preventing slide block 92 from the separation preventing slide groove 64 from the upper port of the separation preventing slide groove 64, a stopper may be provided in the upper port of the separation preventing slide groove 64, so as to ensure that the separation preventing slide block 92 is always located in the separation preventing slide groove 64.
The positioning hole 63 and the core mold 9 may be in the shape of a frustum of a prism, the cross sections of both are square, the core mold 9 is composed of 2 or 4 core mold blocks, as a preferred embodiment, the positioning hole 63 and the core mold 9 are in the shape of a truncated cone, that is, the cross section is circular, and the core mold 9 is composed of 2, 3 or 4 core mold blocks.
The method for preparing the dumbbell-shaped step shaft blank by adopting the mould comprises the following steps:
upsetting one end of the bar stock to obtain a T-shaped intermediate blank 3. The step can adopt the prior art, preferably, a bobbin lower die 4 is prepared, a positioning blind hole is formed in the upper surface of the bobbin lower die 4, one end of a bar is placed into the positioning blind hole during forging, the diameter of the bar is matched with that of the positioning blind hole, the upper end of the bar is located outside the positioning blind hole, an upper bobbin die 2 is placed at the upper end of the bar, the upper bobbin die 2 can be a horizontal plate, and in order to guarantee the forming quality of an end head, an end head forming cavity can be formed in the upper surface of the upper bobbin die 2 or the upper surface of the bobbin lower die 4. Downward pressure is applied to the upper bobbin mold 2, thereby upsetting the upper end of the bar material to obtain a T-shaped intermediate blank 3, as shown in fig. 2. The upper bobbin mould 2 and the lower bobbin mould 4 are not linked, and the upper bobbin mould 2 can be directly taken down after the upper end is formed, so that the operation is very convenient.
Forming a dumbbell-shaped step shaft: as shown in fig. 5, the small end of the T-shaped intermediate billet 3 passes through the central positioning through hole 91 downward and extends into the lower die cavity 71, the upper die 5 is placed on the top of the lower die outer frame 6, so that the large end of the T-shaped intermediate billet 3 is located in the end cavity 61, at this time, the upper surface of the upper end of the T-shaped intermediate billet 3 contacts with the upper die 5, the lower stepped surface of the upper end of the T-shaped intermediate billet 3 contacts with the upper surface of the core die 9, and the upper surface of the lower die outer frame 6 contacts with the upper die 5, so that when the upper die 5 is pressed down, the pressing force is transmitted to the upper end of the T-shaped intermediate billet 3 which is already formed, which causes the upper end to be upset again, and the pressing force is transmitted to the small end of the T-shaped intermediate billet 3, which causes the small end of the T-shaped intermediate billet 3 to be upset and formed into the lower end.
And then the upper die 5 is pressed downwards, so that the lower die outer frame 6 moves downwards, and simultaneously the small end of the T-shaped middle blank 3 is upset and formed into a lower end in the lower die cavity 71, so that a dumbbell-shaped step shaft blank is obtained.
Demolding: and after forging, taking down the upper die 5, pulling the dumbbell-shaped step shaft blank to move upwards, specifically, clamping the upper end of the dumbbell-shaped step shaft blank by using a clamp and pulling the dumbbell-shaped step shaft blank to move upwards, or arranging an ejector rod on the lower die 7, and pushing the dumbbell-shaped step shaft blank to be demoulded and to move upwards by using the ejector rod. When the lower end of the dumbbell-shaped step shaft blank reaches the core mold 9, the core mold 9 is pushed to slide upwards along the side wall of the positioning hole 63 in an inclined mode, the diameter of the central positioning through hole 91 is increased, when the diameter of the central positioning through hole 91 is larger than the outer diameter of the lower end of the dumbbell-shaped step shaft blank, the lower end of the dumbbell-shaped step shaft blank penetrates through the central positioning through hole 91, demolding is completed, and the core mold 9 automatically slides downwards and resets under the action of gravity after demolding.
Therefore, after the forming method is adopted, the forming step of the lower end of the dumbbell-shaped step shaft blank comprises the following steps: placing the T-shaped intermediate blank 3 → installing the upper die 5 → forging → detaching the upper die 5 → directly taking out the dumbbell-shaped step shaft blank, and the forming steps of the conventional forging method include: the installation core mould → the placement of the T-shaped middle blank 3 → the installation of the upper mould 5 → forging → the disassembly of the upper mould 5 → the core mould disassembly → the removal of the dumbbell-shaped step axle blank, thus the invention omits the manual installation and disassembly processes of the core mould 9, simplifies the production process and is beneficial to realizing the production of the dumbbell-shaped step axle blank in batch production.
The end cavity 61 can be arranged on the lower surface of the upper die 5, preferably, the end cavity 61 is arranged on the upper surface of the lower die outer frame 6, the depth of the end cavity 61 is equal to the length of the upper end of the T-shaped middle blank 3, the upper die 5 is a horizontal plate, the horizontal plate is naturally arranged on the upper surface of the lower die outer frame 6, and the positioning hole 63 is located at the bottom of the end cavity 61. Set up end chamber 61 back on lower die outer frame 6, go up mould 5 and just can adopt the horizontal plate of certain thickness, reduced the weight and the volume of last mould 5, be favorable to quick installation and take off last mould 5, and because go up mould 5 when forging and arrange in the upper surface of lower mould outer frame 6 naturally can, operate very convenient and fast, can further improve the installation of last mould 5 and take off efficiency. The depth of the end head cavity 61 is equal to the length of the upper end head of the T-shaped intermediate billet 3, so that the upper end head of the T-shaped intermediate billet 3 and the upper surface of the lower die outer frame 6 are simultaneously contacted with the upper die 5 during forging, the lower surface of the upper end head of the T-shaped intermediate billet 3 is contacted with the upper surface of the core die 9, the upper end head is protected, and the formed upper end head is prevented from being subjected to forging pressure again.
The lower die outer frame 6 can be lifted by adopting various existing lifting mechanisms, preferably, the lower surface of the lower die outer frame 6 is provided with a guide hole 65, the upper surface of the lower die 7 is provided with a guide post 72, the upper end of the guide post 72 extends into the guide hole 65 and is in sliding fit with the guide hole 65, and a spring 8 is arranged between the hole bottom of the guide hole 65 and the guide post 72. In the forging process, when the lower die outer frame 6 moves downwards, the spring 8 is compressed and has larger elasticity, and after the dumbbell-shaped step shaft blank is formed, the spring 8 extends to assist in pushing the dumbbell-shaped step shaft blank to move upwards, so that the force required by demolding is reduced.
And the upper end orifice and the lower end orifice of the positioning hole 63 are rounded and are adaptive to the shape of the upset end.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The forging die for rapidly preparing dumbbell-shaped step shaft blanks in batches is characterized by comprising an upper die (5), a lower die outer frame (6) and a lower die (7) which are sequentially arranged from top to bottom;
a positioning hole (63) is formed in the lower die outer frame (6), the side wall of the positioning hole (63) is obliquely arranged, the orifice at the upper end of the positioning hole (63) is larger than the orifice at the lower end of the positioning hole, a plurality of axially extending anti-falling sliding grooves (64) are formed in the side wall of the positioning hole (63), a core die (9) in sliding fit with the side wall of the positioning hole (63) is arranged in the positioning hole (63), the core die (9) is provided with a central positioning through hole (91), the core die (9) is formed by splicing a plurality of core modules, an anti-falling sliding block (92) is arranged on the outer wall of each core module, and each anti-falling sliding block (92) is positioned in one anti-falling sliding groove (64) and is in sliding fit with the anti-falling sliding groove (64);
the die is characterized in that a head cavity (61) is arranged between the upper die (5) and the lower die outer frame (6), the lower die outer frame (6) is arranged on the lower die (7) in a lifting mode, and a lower die cavity (71) is arranged on the lower die (7) below the central positioning through hole (91).
2. The forging die for rapidly mass-producing dumbbell-shaped stepped shaft blanks according to claim 1, wherein the positioning hole (63) and the core die (9) are both in a truncated cone shape.
3. The forging die for rapidly and massively preparing the dumbbell-shaped step shaft blank according to claim 1, wherein the end cavity (61) is formed in the upper surface of the lower die outer frame (6), the depth of the end cavity (61) is equal to the length of the end of the blank, the upper die (5) is a horizontal plate which is naturally arranged on the upper surface of the lower die outer frame (6), and the positioning hole (63) is formed in the bottom of the end cavity (61).
4. The forging die for rapidly and massively preparing the dumbbell-shaped stepped shaft blank according to claim 1, wherein a guide hole (65) is formed in the lower surface of the lower die outer frame (6), a guide post (72) is formed in the upper surface of the lower die (7), the upper end of the guide post (72) extends into the guide hole (65) and is in sliding fit with the guide hole (65), and a spring (8) is arranged between the bottom of the guide hole (65) and the guide post (72).
5. The forging die for rapidly mass-producing the dumbbell-shaped stepped shaft blank according to claim 1, wherein the upper end opening and the lower end opening of the positioning hole (63) are rounded.
6. The forging method for rapidly preparing the forging die for the dumbbell-shaped step shaft blank in batches according to the claims 1 to 5, which is characterized by comprising
Upsetting one end of the bar stock to obtain a T-shaped intermediate blank (3);
the small end of the T-shaped intermediate blank (3) downwards penetrates through the central positioning through hole (91) and extends into the lower die cavity (71), the upper die (5) is placed at the top of the lower die outer frame (6), so that the large end of the T-shaped intermediate blank (3) is located in the end head cavity (61), then the upper die (5) is pressed downwards, the lower die outer frame (6) moves downwards, and meanwhile, the small end of the T-shaped intermediate blank (3) is upset in the lower die cavity (71), so that a dumbbell-shaped step shaft blank is obtained;
and after forging, the upper die (5) is taken down, the dumbbell-shaped step shaft blank is pulled to move upwards, when the lower end head of the dumbbell-shaped step shaft blank reaches the core die (9), the core die (9) is pushed to slide upwards along the side wall of the positioning hole (63) in an inclined mode, the diameter of the central positioning through hole (91) is increased, when the diameter of the central positioning through hole (91) is larger than the outer diameter of the lower end head of the dumbbell-shaped step shaft blank, the lower end head of the dumbbell-shaped step shaft blank penetrates through the central positioning through hole (91), demolding is completed, and the core die (9) automatically slides downwards and resets under the action of gravity after demolding.
7. The forging method for the rapid and batch production of the dumbbell-shaped stepped shaft blank according to claim 6, wherein the forging process of the T-shaped intermediate blank (3) is as follows: preparing a lower bobbin die (4), wherein a positioning blind hole is formed in the upper surface of the lower bobbin die (4); and (3) placing one end of the bar stock into the positioning blind hole, placing the upper end of the bar stock outside the positioning blind hole, placing the upper bobbin die (2) at the upper end of the bar stock, and applying downward pressure to the upper bobbin die (2) so as to upset the upper end of the bar stock to obtain a T-shaped intermediate blank (3).
8. The forging method for rapid, batch production of dumbbell-shaped stepped shaft blanks as recited in claim 6, wherein after forging, the upper end of the dumbbell-shaped stepped shaft blank is clamped by a clamp and the dumbbell-shaped stepped shaft blank is pulled to move upwards.
9. The forging method for rapidly and massively preparing the dumbbell-shaped stepped shaft blank according to claim 6, wherein the spring (8) is compressed when the lower die outer frame (6) moves downwards, and the spring (8) extends after the dumbbell-shaped stepped shaft blank is formed to assist in pushing the dumbbell-shaped stepped shaft blank to move upwards.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203838.7A CN113953432A (en) | 2021-10-15 | 2021-10-15 | Forging die and forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203838.7A CN113953432A (en) | 2021-10-15 | 2021-10-15 | Forging die and forging method for rapidly preparing dumbbell-shaped step shaft blanks in batches |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115446239A (en) * | 2022-08-23 | 2022-12-09 | 武汉理工大学 | Upsetting forming equipment and upsetting forming method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102974700A (en) * | 2012-11-22 | 2013-03-20 | 宁波轴瓦厂 | SVertical stamping rounding mould with four sleeve petals and availability for automatic demoulding |
| JP2017087234A (en) * | 2015-11-05 | 2017-05-25 | 三菱自動車工業株式会社 | Forging device |
| CN207552164U (en) * | 2017-11-22 | 2018-06-29 | 陈玉琳 | The handle die and its unitary mould of glass cover with handles |
| CN207982075U (en) * | 2018-03-21 | 2018-10-19 | 宁波圣安机器人科技有限公司 | Low punch pickoff |
| CN208437603U (en) * | 2018-07-17 | 2019-01-29 | 日照德信机械制造有限公司 | A kind of blanking mold suitable for dumbbell pin forge piece |
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- 2021-10-15 CN CN202111203838.7A patent/CN113953432A/en active Pending
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| CN102974700A (en) * | 2012-11-22 | 2013-03-20 | 宁波轴瓦厂 | SVertical stamping rounding mould with four sleeve petals and availability for automatic demoulding |
| JP2017087234A (en) * | 2015-11-05 | 2017-05-25 | 三菱自動車工業株式会社 | Forging device |
| CN207552164U (en) * | 2017-11-22 | 2018-06-29 | 陈玉琳 | The handle die and its unitary mould of glass cover with handles |
| CN207982075U (en) * | 2018-03-21 | 2018-10-19 | 宁波圣安机器人科技有限公司 | Low punch pickoff |
| CN208437603U (en) * | 2018-07-17 | 2019-01-29 | 日照德信机械制造有限公司 | A kind of blanking mold suitable for dumbbell pin forge piece |
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| CN115446239A (en) * | 2022-08-23 | 2022-12-09 | 武汉理工大学 | Upsetting forming equipment and upsetting forming method |
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