CN213104285U - Hot forging die for aluminum alloy screw-connecting precision forging - Google Patents
Hot forging die for aluminum alloy screw-connecting precision forging Download PDFInfo
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- CN213104285U CN213104285U CN202021482635.7U CN202021482635U CN213104285U CN 213104285 U CN213104285 U CN 213104285U CN 202021482635 U CN202021482635 U CN 202021482635U CN 213104285 U CN213104285 U CN 213104285U
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- 238000005242 forging Methods 0.000 title claims abstract description 33
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000007723 die pressing method Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
The utility model discloses an aluminum alloy connects forge hot die utensil of accurate forging of spiral shell, including lower cover half subassembly and last movable mould subassembly, the die cavity has been seted up on the cover half subassembly down, it includes the drift to go up the movable mould subassembly, and this drift lower extreme is just right the die cavity, the die cavity includes the circular chamber of the ascending echelonment of opening, and the path portion lower extreme in circular chamber still is connected with two mutual separation's heterotypic column chamber. The utility model has the advantages that: through reasonable design of the die, the screw connecting forging piece with the high-precision special-shaped boss can be obtained through one-step forming, so that the subsequent machining allowance is small, and the production efficiency can be improved.
Description
Technical Field
The utility model belongs to forging and pressing mould equipment field, concretely relates to aluminum alloy connects forge hot mould of spiral shell precision forging.
Background
A screw receiving part is an end face special-shaped part with a complex shape, one end of the screw receiving part is provided with two independent bosses with special-shaped shapes, the size precision requirement of the bosses is high, the shapes of the bosses are special-shaped and complex, the surface quality requirements of the bosses and the bottom surface are quite high, the fillet radius of the intersection part of the side wall and the bottom surface of the special-shaped boss is extremely small and is not allowed to exceed R0.15mm, the fillet radius of the intersection part of the side wall and the side wall of the special-shaped boss is small, the minimum fillet radius is R0.5mm, therefore, the design requirement of the part is difficult to achieve by adopting a conventional milling process, and the production efficiency. At present, a numerical control machining center is generally adopted in China to machine the part, and the qualified screw receiving part can be obtained by the machining method; however, the machining method has the advantages of extremely low material utilization rate, low production efficiency (only a milling cutter with the diameter phi of 1.0mm can be adopted during finish machining, so that the machining amount is small each time, long machining time is needed), high energy consumption, long production period and high manufacturing cost. The difficulty of the forging and pressing production is the process and the proper mould structure. Due to the special shape of the connecting screw, the reasonable design of the forging and pressing die is one of the keys for ensuring the forming quality and reducing the subsequent machining amount.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hot forging mould of aluminium alloy connects spiral shell precision forging.
The technical scheme is as follows:
a hot forging die for an aluminum alloy screw-connecting precision forging piece comprises a lower fixed die assembly and an upper movable die assembly, wherein the lower fixed die assembly comprises a combined female die, a female die cavity is formed in the combined female die, the upper movable die assembly comprises a punch, and the lower end of the punch is opposite to the female die cavity;
the two columnar cavities are arranged in parallel to the axial direction of the circular cavity, and the upper ends of the two columnar cavities are respectively communicated with the circular cavity;
the side inner wall of the cylindrical cavity comprises an arc-shaped surface and a curve surface, the arc-shaped surface is connected with the corresponding vertical edge of the curve surface to form an annular closed inner wall, and the arc-shaped surface is formed by vertically extending part of the side wall of the circular cavity.
By adopting the design, the connecting screw forging piece with the high-precision special-shaped boss can be obtained by one-step forming through reasonably designing the die, so that the subsequent machining allowance is small, and the production efficiency can be improved.
As a preferred technical scheme, the combined female die comprises a female die core and a female die core cushion, wherein a stepped hole is vertically formed in the female die core, the stepped hole comprises a small-diameter part, a middle-diameter part and a large-diameter part which are sequentially arranged along a central line from bottom to top, the large end of the stepped hole faces upwards, the female die core cushion is slidably arranged in the small-diameter part of the stepped hole, two columnar notches are formed in the side wall of the female die core cushion, and the two columnar notches extend to two end faces of the female die core cushion respectively;
the two columnar gaps and the stepped hole above the concave die core cushion form the concave die cavity.
By adopting the design, the stepped hole is used for forming the disc part of the connecting screw forging, the columnar gap is used for forming the special-shaped boss, the female die is simple in structure, and the female die is convenient to replace after being worn.
As a preferred technical scheme, the lower fixed die assembly is also provided with a material ejecting rod hole, and the material ejecting rod hole is positioned below the female die cavity and communicated with the female die cavity;
the ejection rod is arranged in the ejection rod hole in a sliding mode, the ejection rod comprises a limiting disc and two special-shaped columns vertically arranged on the upper surface of the limiting disc, the two special-shaped columns are respectively arranged in the corresponding columnar notches in a sliding mode in a penetrating mode, and the special-shaped columns are respectively matched with the corresponding columnar notches.
By adopting the design, the design of the special-shaped ejector rod is matched with the shape of the screw receiving forge piece.
As a preferred technical scheme, the lower fixed die assembly further comprises a lower die plate, the upper surface of the lower die plate is provided with a lower die base, a lower die base plate and a lower die lining are sequentially arranged in the lower die base from bottom to top, the lower end of the lower die lining is arranged on the lower die base plate, an ejector rod cushion block and a female die cushion block are sequentially embedded in the lower die lining from bottom to top, the upper surface of the female die cushion block is level with the upper end surface of the lower die lining, a female die outer sleeve is arranged above the female die cushion block and the lower die lining, and the lower end of the female die outer sleeve is arranged on the lower die lining and is sleeved in the lower die base;
the combined female die is arranged in the female die outer sleeve, and the female die outer sleeve is matched with the conical surface of the female die core;
the upper end of the female die outer sleeve is provided with a female die pressing plate in a matched mode through a step, and the female die pressing plate covers the upper end of the lower die base and is connected with the lower die base through a bolt so as to tightly press the female die outer sleeve;
the female die cushion block is provided with two corresponding columnar notches, through holes are formed in the columnar notches respectively, a stepped hole with a large top and a small bottom is formed in the ejector rod cushion block in a penetrating mode, the stepped hole is communicated with the through holes and the two columnar notches, the stepped hole and the two through holes form an ejector rod hole, a limiting disc of the ejector rod is located in the stepped hole, and the two ejector rods are arranged in the through holes in a penetrating mode respectively. As the preferred technical scheme, the lower die base plate and the lower die plate are provided with ejector rod holes in a penetrating mode, the ejector rod holes are located under the ejector rod holes and communicated with the ejector rod holes, ejector rods penetrate through the ejector rod holes, and the upper ends of the ejector rods abut against the lower surface of the limiting disc.
By adopting the design, the stepped hole in the ejector rod cushion block is used for installing the ejector rod, the stepped hole is combined with the female die cushion block to limit the limiting disc part of the ejector rod, the female die cushion block supports the female die core cushion, two via holes in the female die cushion block are used for guiding the ejector rod, and the whole lower die is reasonable in structural design.
Compared with the prior art, the beneficial effects of the utility model are that: through reasonable design of the die, the screw connecting forging piece with the high-precision special-shaped boss can be obtained through one-step forming, so that the subsequent machining allowance is small, and the production efficiency can be improved.
Drawings
FIG. 1 is a schematic view of a design structure of a screw receiving part;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic design structure diagram of a forging;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a schematic structural diagram of a hot forging die;
fig. 6 is an enlarged view of a portion m in fig. 5.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in fig. 1 and 2, the screw receiving part comprises a disk and two special-shaped bosses vertically arranged on the same surface of the disk. The two special-shaped bosses are arranged in parallel to the axial direction of the disc. The two special-shaped bosses are respectively a first special-shaped boss and a second special-shaped boss.
The cross section of first heterotypic boss includes first pitch arc and first curve, the both ends of this first pitch arc respectively with the both ends of first curve are connected, in order to enclose the cross section of first heterotypic boss, just first pitch arc corresponds the lateral wall of first heterotypic boss is formed by the vertical extension of the partial lateral wall of periphery of disc.
The cross-section of second heterotypic boss includes second pitch arc and second curve, the both ends of this second pitch arc respectively with the both ends of second curve are connected, in order to enclose the cross-section of second heterotypic boss, just the second pitch arc corresponds the lateral wall of second heterotypic boss by the vertical extension of part periphery lateral wall of disc forms.
The material of the screw connecting part is 7A04 super-hard aluminum alloy. The maximum diameter of the screw receiving part is only phi 28mm, the thickness of the disc is only 4.0mm, and the height of the two special-shaped bosses is only 4.4 mm. Because the surface precision requirement is higher, when in stamping production, the special-shaped boss is directly molded except that proper machining allowance is left in the height direction of the special-shaped boss; machining allowance needs to be reserved on the disk part, so that qualified screw receiving parts can be machined when the appearance of the special-shaped boss and the bottom plane are used as positioning references in subsequent machining. The structure of the precision forging is shown in figures 3 and 4, and the precision forging is formed by hot forging with the following die.
As shown in FIG. 5, the hot forging die for the aluminum alloy screw-receiving precision forging comprises a lower fixed die assembly and an upper movable die assembly. The lower fixed die assembly comprises a lower die plate 8, a lower die base 12 is arranged on the upper surface of the lower die plate 8, a lower die base plate 7 and a lower die bushing 6 are sequentially arranged in the lower die base 12 from bottom to top, the lower end of the lower die bushing 6 falls on the lower die base plate 7, an ejector rod cushion block 10 and a female die cushion block 11 are sequentially embedded in the lower die bushing 6 from bottom to top, the upper surface of the female die cushion block 11 is flat with the upper end surface of the lower die bushing 6, a female die jacket 5 is arranged above the female die cushion block 11 and the lower die bushing 6, and the lower end of the female die jacket 5 falls on the lower die bushing 6 and is sleeved in the lower die base 12.
The die is characterized in that a combined die is arranged in the die outer sleeve 5 and comprises a female die core 14 and a female die core pad 15, as shown in fig. 6, a stepped hole is vertically formed in the female die core 14 and comprises a small-diameter part, a middle-diameter part and a large-diameter part which are sequentially arranged from bottom to top along a central line. The large end of the stepped hole faces upward, and the die core cushion 15 is slidably disposed in the small diameter portion of the stepped hole. The outer side wall of the female mold core 14 is in conical surface fit with the female mold jacket 5.
The upper end of the female die outer sleeve 5 is provided with a female die pressing plate 4 in a matched mode through a step, and the female die pressing plate 4 covers the upper end of the lower die holder 12 and is connected with the lower die holder through a bolt so as to tightly press the female die outer sleeve 5.
Two columnar gaps are formed in the side wall of the female die core cushion 15 and are parallel to the axial direction of the stepped hole, and the two columnar gaps extend to two end faces of the female die core cushion 15 respectively. The upper ends of the two columnar notches are respectively communicated with the small-diameter part of the stepped hole. The two columnar gaps and the stepped hole above the concave die core pad 15 form a concave die cavity 18.
The side walls of the two columnar notches are respectively curved surfaces, the inner wall of the small diameter part of the stepped hole, which is opposite to the curved surfaces, is an arc-shaped surface, and the two curved surfaces and the corresponding arc-shaped surfaces respectively enclose two columnar cavities.
Through holes are vertically formed in the female die cushion block 11 corresponding to the two columnar notches respectively, a stepped hole with a large upper part and a small lower part is formed in the ejector rod cushion block 10 in a penetrating mode, the stepped hole is communicated with the two through holes and the two columnar notches, and the stepped hole and the two through holes form an ejector rod hole. The material ejecting rod 13 is arranged in the material ejecting rod hole in a sliding mode, and the material ejecting rod 13 comprises a limiting disc and two special-shaped columns which are vertically arranged on the upper surface of the limiting disc. The limiting disc is located in the step hole. The two special-shaped columns are respectively arranged in the corresponding through holes and the corresponding columnar notches in a penetrating mode, and the special-shaped columns are respectively matched with the corresponding columnar notches.
Lower mould backing plate 7 with it has the ejector pin hole to run through on the lower bolster 8, and this ejector pin hole is located under the ejector pin hole and rather than the intercommunication, and this ejector pin is downthehole to be worn to be equipped with ejector pin 9, and this ejector pin 9 upper end supports and leans on the lower surface of spacing dish.
The upper moving die assembly comprises an upper die plate 1, a punch cushion block 17 is arranged on the lower surface of the upper die plate 1, a punch 16 is arranged on the lower surface of the punch cushion block 17, an upper die base 2 is arranged on the outer cover of the punch cushion block 17 and the punch 16, the upper die base 2 is connected with the upper die plate 1 through bolts, and the upper die base 2 is in step fit with the punch 16. The lower end of the punch 16 penetrates through the upper die holder 2, the lower end of the punch 16 is opposite to the female die cavity 18,
the upper die holder 2 is also vertically provided with a small guide pillar 3, and the die outer sleeve 5 is provided with a guide hole corresponding to the small guide pillar 3.
The molding process using the mold comprises the following steps: the mold is mounted on a press. Heating the cylindrical blank to 420 +/-20 ℃, preheating the die to 150 +/-30 ℃, respectively lubricating the blank and the die, then placing the blank into a female die cavity 18, and carrying out hot stamping and forming. Wherein, the large end part and the middle part of the female die cavity 18 and the small end part above the upper end surface of the female die core pad 15 are internally provided with a disc-shaped part of a forged piece, the side wall of the disc-shaped part is provided with a step, and two columnar cavities of the female die cavity 18 are respectively provided with a special-shaped boss.
The die uses a special-shaped ejector rod 13, and two special-shaped columns of the ejector rod 13 respectively correspond to two special-shaped bosses of the forge piece. And after forging and pressing are finished, the ejection rod 13 ejects the forged piece. And subsequently, milling and drilling to obtain the screw receiving part.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (5)
1. The utility model provides an aluminum alloy connects forge hot die utensil of spiral shell precision piece, includes cover half subassembly and last movable mould subassembly down, cover half subassembly includes the combination die down, has seted up die cavity (18) on this combination die, it includes drift (16) to go up the movable mould subassembly, and this drift (16) lower extreme is just right die cavity (18), its characterized in that: the female die cavity (18) comprises a circular cavity with an upward opening, and the lower end of the circular cavity is also connected with two mutually separated cylindrical cavities;
the two columnar cavities are arranged in parallel to the axial direction of the circular cavity, and the upper ends of the two columnar cavities are respectively communicated with the circular cavity;
the side inner wall of the cylindrical cavity comprises an arc-shaped surface and a curve surface, the arc-shaped surface is connected with the corresponding vertical edge of the curve surface to form an annular closed inner wall, and the arc-shaped surface is formed by vertically extending part of the side wall of the circular cavity.
2. A hot forging die for an aluminum alloy screw-receiving precision forging according to claim 1, wherein: the combined female die comprises a female die core (14) and a female die core pad (15), wherein a stepped hole is vertically formed in the female die core (14), the stepped hole comprises a small-diameter part, a middle-diameter part and a large-diameter part which are sequentially arranged from bottom to top along a central line, the large end of the stepped hole faces upwards, the female die core pad (15) is slidably arranged in the small-diameter part of the stepped hole, two columnar notches are formed in the side wall of the female die core pad (15), and the two columnar notches extend to two end faces of the female die core pad (15) respectively;
the two columnar gaps and the stepped hole above the female die core pad (15) form the female die cavity (18).
3. A hot forging die for an aluminum alloy screw-receiving precision forging according to claim 2, wherein: the lower fixed die component is also provided with a material ejecting rod hole which is positioned below the female die cavity (18) and communicated with the female die cavity;
the ejection rod (13) is arranged in the ejection rod hole in a sliding mode, the ejection rod (13) comprises a limiting disc and two special-shaped columns which are vertically arranged on the upper surface of the limiting disc, the two special-shaped columns are respectively arranged in the corresponding columnar notches in a sliding mode in a penetrating mode, and the special-shaped columns are respectively matched with the corresponding columnar notches.
4. A hot forging die for an aluminum alloy screw-receiving precision forging according to claim 3, wherein: the lower fixed die assembly further comprises a lower die plate (8), the upper surface of the lower die plate (8) is provided with a lower die base (12), a lower die base plate (7) and a lower die bushing (6) are sequentially arranged in the lower die base (12) from bottom to top, the lower end of the lower die bushing (6) falls on the lower die base plate (7), an ejector rod cushion block (10) and a female die cushion block (11) are sequentially embedded in the lower die bushing (6) from bottom to top, the upper surface of the female die cushion block (11) is flat with the upper end surface of the lower die bushing (6), a female die jacket (5) is arranged above the female die cushion block (11) and the lower die bushing (6), and the lower end of the female die jacket (5) falls on the lower die bushing (6) and is sleeved in the lower die base (12);
the combined female die is arranged in the female die outer sleeve (5), and the female die outer sleeve (5) is in conical surface fit with the female die core (14);
the upper end of the female die outer sleeve (5) is provided with a female die pressing plate (4) in a matched mode through a step, and the female die pressing plate (4) covers the upper end of the lower die holder (12) and is connected with the lower die holder through a bolt so as to tightly press the female die outer sleeve (5);
the die cushion block (11) is provided with two corresponding columnar notches, through holes are respectively formed in the columnar notches, a step hole with a large top and a small bottom is formed in the ejector rod cushion block (10) in a penetrating mode, the step hole is communicated with the through holes and the two columnar notches, the step hole and the two through holes form an ejector rod hole, a limiting disc of the ejector rod (13) is located in the step hole, and the two ejector rods (13) are respectively arranged in the through holes in a penetrating mode.
5. A hot forging die for an aluminum alloy screw-receiving precision forging according to claim 4, wherein: lower mould backing plate (7) with run through on lower bolster (8) and have the ejector pin hole, this ejector pin hole is located under the ejector pin hole and rather than the intercommunication, this ejector pin is downthehole to be worn to be equipped with ejector pin (9), and this ejector pin (9) upper end supports and leans on the lower surface of spacing dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021482635.7U CN213104285U (en) | 2020-07-24 | 2020-07-24 | Hot forging die for aluminum alloy screw-connecting precision forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021482635.7U CN213104285U (en) | 2020-07-24 | 2020-07-24 | Hot forging die for aluminum alloy screw-connecting precision forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213104285U true CN213104285U (en) | 2021-05-04 |
Family
ID=75680881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021482635.7U Expired - Fee Related CN213104285U (en) | 2020-07-24 | 2020-07-24 | Hot forging die for aluminum alloy screw-connecting precision forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213104285U (en) |
-
2020
- 2020-07-24 CN CN202021482635.7U patent/CN213104285U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210504 |