CN110976733A - Hub direct forging die and forging process thereof - Google Patents
Hub direct forging die and forging process thereof Download PDFInfo
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- CN110976733A CN110976733A CN201911311325.0A CN201911311325A CN110976733A CN 110976733 A CN110976733 A CN 110976733A CN 201911311325 A CN201911311325 A CN 201911311325A CN 110976733 A CN110976733 A CN 110976733A
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- 238000005242 forging Methods 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 21
- 238000000465 moulding Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000003754 machining Methods 0.000 description 9
- 238000009987 spinning Methods 0.000 description 9
- 238000004080 punching Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
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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
- 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
-
- 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
- B21K1/28—Making machine elements wheels; discs
- B21K1/40—Making machine elements wheels; discs hubs
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of automobile manufacturing, and particularly discloses a direct forging die of a wheel hub and a forging process thereof, wherein the direct forging die of the wheel hub comprises an upper die, wherein an upper molded surface is arranged on the upper die; the lower die is positioned below the upper die, and a lower molded surface is arranged on the lower die; the side dies are arranged along the circumferential direction of the lower die, and arc-shaped side parting profiles are arranged on the side dies; the first driving devices are connected with the side dies in a one-to-one correspondence manner, can drive the side dies to reciprocate along the radial direction of the lower die, and can drive the side dies to be attached to the lower die; the die locking sleeve is annular and is used for locking the side dies and the lower die during die assembly; when the die is closed, the side-divided molded surfaces of the side dies are sequentially connected to form a circular side molded surface, and the upper molded surface, the lower molded surface and the side molded surface form a cavity of the hub. The side die cavity of the hub is formed through the side die, after forging is finished, the side die is far away from the lower die through the first driving device, the hub can be smoothly demoulded from the lower die, and direct forging production of the hub is achieved.
Description
Technical Field
The invention relates to the field of automobile manufacturing, in particular to a direct forging die for a wheel hub and a forging process thereof.
Background
The traditional direct forging die comprises an upper die and a lower die, wherein a die cavity is arranged on the lower die, a piece to be forged is placed in the die cavity, the upper die and the lower die are matched under the action of pressure, and a required forged piece is forged.
For a hub forging, as shown in fig. 1, the hub comprises a spoke 10, a rim 20 and a rim 30, since the rim 20 is recessed towards the center of the hub relative to the rim 30, if the hub forging is directly forged and formed by adopting a traditional forging process, the rim 30 of the hub forging is blocked by the wall of a die cavity after the forging is finished, and the demolding cannot be realized. Therefore, at present, the hub forging is usually produced by a forming process combining pre-forging, finish forging and spinning, the rough contour of the hub forging is obtained through the pre-forging and the finish forging, after the finish forging is finished, punching, trimming and reaming are carried out, and then the rim 20 and the rim 30 of the hub forging are processed through the spinning process.
However, when the hub forging piece adopts a forming process combining pre-forging, forging and spinning, the following problems exist:
1) the machining allowance of the wheel hub forging piece is large, the machining working time is increased, and the production cost of the wheel hub forging piece is increased;
2) the investment cost is high, a forging press, punching, trimming and reaming equipment and spinning equipment are required to be invested, and the investment amount is high;
3) the hub forging can be formed through forging, punching, trimming and reaming and spinning processes, the forming processes are more, and the hub production cost is higher.
Therefore, a direct forging die for a wheel hub and a forging process thereof are needed to solve the above problems.
Disclosure of Invention
The invention aims to: the utility model provides a straight forging die of wheel hub and forging technology thereof to solve the problem that in the prior art, the wheel hub can not be directly produced by straight forging because of demoulding interference of rim and flange.
In one aspect, the present invention provides a drop forging die for a wheel hub, comprising:
the upper die is provided with an upper molded surface;
the lower die is arranged opposite to the upper die and positioned below the upper die, and a lower molded surface is arranged on the lower die;
the side dies are arranged along the circumferential direction of the lower die, and arc-shaped side parting profiles are arranged on the side dies;
the first driving devices are connected with the side dies in a one-to-one correspondence mode, can drive the side dies to reciprocate along the radial direction of the lower die, and can drive the side dies to be attached to the lower die;
the die locking sleeve is annular and is used for locking the side dies and the lower die when the dies are closed;
when the die is assembled, the side-divided molded surfaces of the side dies are sequentially connected to form a circular side molded surface, and the upper molded surface, the lower molded surface and the side molded surface form a cavity of the hub.
Preferably, the lower die comprises a lower die core and an ejector rod, the first driving device can drive the side die to be attached to the lower die core, a first through hole is formed in the lower die core, the ejector rod is located in the first through hole and is in sliding fit with the lower die core, and the ejector rod is used for ejecting the forged and forged hub forge piece out of the lower die core;
the lower mold core is provided with a first lower molding surface, the ejector rod is provided with a second lower molding surface, and the first lower molding surface and the second lower molding surface form the lower molding surface.
Preferably, the lower die further comprises a second driving device, the second driving device is connected with the ejector rod, and the second driving device can drive the ejector rod to reciprocate along the vertical direction.
Preferably, the lower die core is provided with a groove, the groove is located above the first through hole, the first through hole penetrates through the groove, one end of the top of the ejector rod is provided with a clamping protrusion, the clamping protrusion is connected with the groove in a clamped mode, and the second lower profile is arranged on the clamping protrusion.
Preferably, the lower die further comprises a lower die plate, the lower die core is mounted on the lower die plate and located above the lower die plate, the first driving device is fixedly mounted on the lower die plate, the side die is located above the lower die plate and slidably connected with the lower die plate, the lower die plate is provided with a second through hole, the first through hole and the second through hole are coaxially arranged, and one end of the bottom of the ejector rod penetrates through the second through hole.
Preferably, the lower template and the lower mold core are of an integral structure.
Preferably, the mold locking sleeve is provided with a first guide inclined plane, the side mold is provided with a second guide inclined plane, and the first guide inclined plane and the second guide inclined plane can be attached.
Preferably, the hub direct forging die further comprises a die locking sleeve backing plate, the die locking sleeve is fixed on the die locking sleeve backing plate, and the upper die penetrates through the die locking sleeve backing plate and is in sliding connection with the die locking sleeve backing plate.
In another aspect, the present invention provides a forging process of a forging die for a wheel hub according to any one of the above aspects, including:
the first driving device drives the side die to abut against the lower die;
placing a pre-forging piece of the hub in a cavity formed by the lower molded surface and the side molded surface;
controlling the mold locking sleeve to move downwards, sleeving the mold locking sleeve on the periphery of the side mold, and pressing the side mold on the lower mold;
pressure is applied to the upper mold, the upper and lower molds are closed and held for a time T3.
Preferably, the preparation method of the pre-forging piece comprises the following steps:
preparing a blank;
placing the blank on a pre-forging lower die of a pre-forging die;
and applying pressure on a pre-forging upper die of the pre-forging die to enable the pre-forging upper die to descend, closing the pre-forging upper die and the pre-forging lower die, forging and pressing the blank into a pre-forging piece, and maintaining the pressure for T1.
The invention has the beneficial effects that:
the side molded surfaces of the hub cavity are formed through the side dies, each side die can move in a reciprocating mode in the radial direction of the lower die through the driving of the first driving device, and therefore after forging is finished, the side dies can be separated from the lower die, the upper die and the forged hub, the hub can be smoothly demoulded from the lower die, direct forging production of the hub is achieved, a spinning process is not needed, the process is simple, production efficiency is high, and production cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a hub according to the prior art of the present invention;
FIG. 2 is a front view of a drop center die of the wheel hub in an embodiment of the present invention;
FIG. 3 is a side view of a drop center die of the wheel hub in an embodiment of the present invention;
FIG. 4 is a cross-sectional view of the drop center die of the hub of FIG. 2 taken along A-A;
FIG. 5 is a cross-sectional view of the drop center die of the hub of FIG. 3 taken along the direction B-B;
FIG. 6 is an exploded view of the drop center die of the wheel hub in an embodiment of the present invention;
FIG. 7 is a schematic view showing a wheel hub prior to forging by a blocker die (with no blank placed) according to an embodiment of the present invention;
FIG. 8 is a schematic view of a second pre-forging die of the wheel hub (blank placement) according to an embodiment of the present invention;
FIG. 9 is a schematic view of a pre-forging die of a wheel hub during forging in accordance with an embodiment of the present invention;
FIG. 10 is a schematic illustration of a hub prior to forging with a drop forging die (no pre-forge has been placed) in accordance with an embodiment of the present invention;
FIG. 11 is a schematic drawing II of the wheel hub before forging by the blocker (placing the pre-forging piece) in the embodiment of the present invention;
FIG. 12 is a schematic view showing a hub before forging of a drop forging die according to an embodiment of the present invention (mode-locked by a mode-locked sleeve);
FIG. 13 is a schematic view of a hub during swaging of a drop forging die in accordance with an embodiment of the present invention;
FIG. 14 is a flow chart of hub forging manufacturing in accordance with an embodiment of the present invention.
In the figure:
10. a spoke; 20. a rim; 30. a rim;
1. an upper die; 11. an upper molding surface;
2. a lower die; 21. a lower mold core; 211. a first lower profile; 212. a first through hole; 213. a groove; 22. a top rod; 221. clamping convex; 2211. a second lower profile; 23. a lower template; 231. a second through hole; 232. a card slot; 24. a lower profile;
3. side mould; 31. dividing a side molded surface; 32. a second guide slope;
4. a first driving device;
5. mounting blocks;
6. a mold locking sleeve; 61. a first guide slope;
7. a die sleeve backing plate is locked; 71. a third through hole;
8. pre-forging an upper die;
9. pre-forging the lower die;
100. a blank; 200. pre-forging; 300. a hub forging.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 2 to 6 and 10 to 13, the present embodiment provides a forging die for a wheel hub, which includes an upper die 1, a lower die 2, a side die 3, a first driving device 4, and a die case 6. The upper die 1 is provided with an upper profile 11 for shaping the inner surface of the spoke, the inner surface of the rim and the inner surface of the rim. The lower die 2 is cylindrical, the lower die 2 is arranged opposite to the upper die 1 and is positioned right below the upper die 1, and the lower die 2 is provided with a lower molded surface 24 for forming the outer surface of the spoke. The plurality of side dies 3 are arranged at equal intervals along the circumferential direction of the lower die 2, and each side die 3 is provided with an arc-shaped side parting surface 31. First drive arrangement 4 and side form 3 one-to-one setting, first drive arrangement 4 is connected with side form 3, and can drive side form 3 along the radial reciprocating motion of lower mould 2, when drive side form 3 when moving to being close to lower mould 2 one side, can support side form 3 tightly on lower mould 2, during the compound die, each side form 3 all supports when tightly with lower mould 2, two adjacent side forms 3 support tightly in the direction along the circumference of lower mould 2, all side forms 3 are whole to be the ring form, and around the periphery at lower mould 2, each divides side profile 31 to connect gradually and constitutes the side profile, the side profile is used for forming the surface of rim and the surface of rim. The mold locking sleeve 6 is in a circular ring shape, when each side mold 3 and the lower mold 2 are tightly abutted, the mold locking sleeve 6 is sleeved on the periphery of each side mold 3 and tightly abutted to the side mold 3, the side mold 3 and the lower mold 2 are locked, and the side mold 3 can be effectively prevented from expanding in the forging and pressing process. The upper profile 11, the lower profile 24 and the side profiles constitute the cavity of the hub.
It should be noted that, the inner and outer portions mentioned in this embodiment are referred to when the wheel hub is mounted on an automobile, and the outer surface is taken as an example, the spoke portion which can be directly seen from the outside is the outer surface of the spoke, the surface of the rim on the side wall is the outer surface of the rim, and the surface of the rim on the side wall is the outer surface of the rim. The first driving device 4 in this embodiment may be a hydraulic cylinder, an air cylinder, a lead screw nut mechanism, or the like, the number of the side molds 3 in this embodiment is two, and in other embodiments, three, four, six, or eight side molds may be provided.
This embodiment is through setting up movable side form 3 to through the surface of side form 3 shaping wheel hub's rim and rim, the back is accomplished in the forging and pressing, side form 3 can be separated with wheel hub forging 300, and wheel hub forging 300 is from the in-process of drawing of patterns on the lower mould 2, and side profile and wheel hub forging 300 do not have the interference, can realize drawing of patterns smoothly, have realized wheel hub's direct forging production.
In particular, the upper die 1 comprises a punch on which the upper profile 11 is arranged. The lower die 2 comprises a lower die core 21, a top rod 22, a lower die plate 23 and a second driving device, the lower die core 21 and the first driving device 4 are both installed on the lower die plate 23 and are both located above the lower die plate 23, the side die 3 is located above the lower die plate 23, the lower die core 21 is provided with a first through hole 212, the axis of the first through hole 212 is in the vertical direction, the lower die plate 23 is provided with a second through hole 231, the second through hole 231 and the first through hole 212 are the same in aperture and are coaxially arranged, the top rod 22 is simultaneously located in the first through hole 212 and the second through hole 231 and is in sliding fit with the lower die core 21 and the lower die plate 23, the second driving device is connected with the top rod 22, the top rod 22 can be driven to slide in a reciprocating manner relative to the lower die core 21 and the lower die plate 23 in the vertical direction, and the top rod 22 is used for ejecting forged forg.
It should be noted that in this embodiment, the lower mold core 21 and the lower mold plate 23 are integrally disposed, the lower mold core 21 is provided with the first lower molding surface 211, the top bar 22 is provided with the second lower molding surface 2211, and when the top bar 22 is not ejected, the first lower molding surface 211 and the second lower molding surface 2211 are smoothly connected to form the lower molding surface 24. The second driving device may be a hydraulic cylinder, an air cylinder or a lead screw nut mechanism, etc.
In this embodiment, the first driving device 4 is installed on the lower template 23 through the installation block 5, the lower template 23 is provided with a clamping groove 232, one end of the installation block 5 is clamped in the clamping groove 232, and the other end is located above the lower template 23 and is fixedly connected with the first driving device 4.
In this embodiment, the lower mold core 21 is provided with the groove 213, the groove 213 is located above the first through hole 212, the first through hole 212 penetrates through the groove 213, the clamping protrusion 221 is arranged at one end of the top rod 22, the clamping protrusion 221 is clamped with the groove 213, and the shapes of the clamping protrusion 221 and the groove 213 are matched with each other.
The hub direct forging die further comprises a die locking sleeve backing plate 7, the die locking sleeve 6 is fixedly mounted on the lower surface of the die locking sleeve backing plate 7 through a bolt, a third through hole 71 is formed in the die locking sleeve backing plate 7, and a punch is located in the third through hole 71 and is in sliding connection with the die locking sleeve backing plate 7. In this embodiment, the outer peripheral surface of the punch is a cylindrical surface, and the center line of the punch coincides with the center line of the die sleeve 6.
Be equipped with first direction inclined plane 61 on the die locking cover 6, be equipped with second direction inclined plane 32 on the side form 3, first direction inclined plane 61 and second direction inclined plane 32 can laminate. The mold locking sleeve 6 is in a circular ring-shaped structure, the inner surface of the circular ring-shaped structure is a first guide inclined surface 61, one end of the bottom of the first guide inclined surface 61, opposite to the end of the top of the first guide inclined surface, is close to the center line of the lower mold core 21, one end of the top of the second guide inclined surface 32, opposite to the end of the bottom of the top of the first guide inclined surface, after each side mold 3 and the lower mold core 21 are attached, the mold locking sleeve 6 is sleeved on the periphery of each side mold 3, the side molds 3 are tightly pressed on the lower mold core 21 in a pressure equalizing mode, the side molds 3 and the lower mold core 21 are guaranteed to be locked, and therefore the side.
As shown in fig. 7 to 14, the present embodiment provides a forging process of a forging die for a wheel hub in the foregoing solution, including:
s1: preparation before preforging
S10: a blank 100 is made.
The blank 100 may be of an aluminum alloy or magnesium alloy material and is a bar stock.
S11: the blank 100 is heated.
The heating temperature of the blank 100 must be within the forging temperature range of aluminum alloy and magnesium alloy, and the blank 100 is heated to be consistent in internal and external temperature.
S2: preforging
S20: preheating a preforging die.
The preheating temperature of the pre-forging die is 300-400 ℃, and the preheating of the pre-forging die and the heating of the blank 100 can be carried out simultaneously, so that the time is saved. The structure of the pre-forging die is shown in fig. 7-9, the pre-forging die comprises an upper pre-forging die 8 and a lower pre-forging die 9, the upper pre-forging die 8 is matched with the lower pre-forging die 9, a concave cavity is formed in the lower pre-forging die 9, a pre-forming upper profile is formed in the upper pre-forging die 8 and used for pre-forming the inner surface of the spoke, and the upper pre-forging die 8 can be located in the cavity of the lower pre-forging die 9 during die assembly.
S21: and spraying a lubricant on the surface of the cavity of the pre-forging die after the preheating temperature of the pre-forging die reaches 300-400 ℃.
S22: the blank 100 is placed onto a pre-forging die.
As shown in fig. 7 and 8, the blank 100 is placed in the cavity of the lower preforging die 9 and the blank 100 is ready to be upset by the upper preforging die 8.
S23: pressure is applied to the upper preforging die 8, the upper preforging die 8 descends, the upper preforging die 8 and the lower preforging die 9 are closed, the blank 100 is forged into a preforging piece 200, and the pressure is maintained for T1.
As shown in fig. 9, the upper preforging die 8 applies a first preset pressure to the upper preforging die 8 by pressure control for a dwell time T1. Time T1 may be the time required for upper and lower pre-forged molds 8 and 9 to close until blank 100 fills the entire cavity. After forging the blank 100 into the preliminary forging 200, the upper surface of the preliminary forging 200 is forged into the inner surface of the preliminary spoke by the preliminary upper profile on the preliminary forging upper die 8.
S3: and (5) finish forging and forming.
S31: preheating a direct forging die of the hub.
The preheating may be performed simultaneously during the pre-forging forming.
S32: the first driving device 4 drives the side mold 3 and the lower mold 2 to abut.
As shown in fig. 10, each side die 3 abuts the lower die 2 so that the side and lower profiles 24 form an open-topped cavity.
S33: as shown in fig. 11, a pre-forging 200 is placed in the cavity formed by the lower profile 24 and the side profiles of the lower die 2.
S34: and controlling the mold locking sleeve 6 to move downwards, sleeving the mold locking sleeve 6 on the periphery of the side mold 3, and pressing the side mold 3 on the lower mold 2.
As shown in fig. 12, the mold clamping sleeve 6 is driven to move downward by the mold clamping sleeve backing plate 7 until the first guide slope 61 and the second guide slope 32 are attached, and a second preset pressure is applied to the mold clamping sleeve backing plate 7 for a pressure holding time T2.
S35: pressure is applied to the upper die 1, and the pressure is maintained for time T3, so that the upper die 1 and the pre-forging piece 200 are contacted and extruded downwards until the pre-forging piece 200 fills the cavity of the hub.
As shown in fig. 13, the punch and the lower die core 21 are controlled to be closed, and the pre-forging 200 is forged into the hub forging 300.
S36: after the pre-forging piece 200 is filled in the cavity of the whole hub and is stable, the die locking sleeve 6 is driven to move upwards through the die locking sleeve backing plate 7, then the punch head moves upwards, the first driving device 4 drives the side die 3 to be far away from the lower die core 21, and the second driving device drives the ejector rod 22 to eject the forging piece.
As shown in fig. 14, in the forging process of the straight forging die for a hub according to this embodiment, a hub forging 300 can be directly manufactured by one-step finish forging on the basis of one-step pre-forging. The traditional two-forging one-rotation machining process is greatly simplified, the machining working hours are shortened, the machining cost can be obviously reduced, the machining allowance of the formed hub forging 300 is smaller than that of a forging obtained by the two-forging one-rotation machining process, and raw materials are saved. And the direct forging die is formed through backward extrusion, and the obtained hub forging 300 is compact in structure and fine in grain size.
Compared with a hub production line adopting a two-forging one-rotation process, the hub forging production line adopting the forging process of the straight forging die of the hub has low investment cost which is mainly expressed in the following aspects:
1) the hub production line of the forging process of the direct forging die only needs one press, one press is less than that of the forging production line of the two-forging one-spinning process, the punching, trimming, reaming and pressing machines and spinning equipment do not need to be invested, and meanwhile, the production line also reduces the investment of a hub transfer manipulator.
2) The production line of the forging process of the straight forging die only puts in one set of straight forging die, and does not need to put in a punching, trimming and reaming die and a spinning die.
3) The hub forging 300 produced by the forging process of the direct forging die has less machining allowance, and the same number of hubs are machined in one year, so that the investment amount of machining equipment can be reduced.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A drop forging die of a wheel hub, comprising:
the mould comprises an upper mould (1), wherein an upper moulding surface (11) is arranged on the upper mould (1);
the lower die (2) is arranged opposite to the upper die (1) and is positioned below the upper die (1), and a lower molded surface (24) is arranged on the lower die (2);
the side dies (3) are arranged along the circumferential direction of the lower die (2), and arc-shaped side parting profiles (31) are arranged on the side dies (3);
the first driving devices (4) are connected with the side dies (3) in a one-to-one correspondence mode, can drive the side dies (3) to reciprocate along the radial direction of the lower die (2), and can drive the side dies (3) to be attached to the lower die (2);
the die locking sleeve (6) is annular and is used for locking the side dies (3) with the lower die (2) during die assembly;
when the die is assembled, the side parting profiles (31) of the side dies (3) are sequentially connected to form a circular side profile, and the upper profile (11), the lower profile (24) and the side profile form a cavity of the hub.
2. The drop forging die for the wheel hub of claim 1, wherein the lower die (2) comprises a lower die core (21) and an ejector rod (22), the first driving device (4) can drive the side die (3) to be attached to the lower die core (21), a first through hole (212) is formed in the lower die core (21), the ejector rod (22) is located in the first through hole (212) and is in sliding fit with the lower die core (21), and the ejector rod (22) is used for ejecting the forged wheel hub forge piece (300) out of the lower die core (21);
be equipped with first profile (211) down on lower mold core (21), be equipped with profile (2211) down under the second on ejector pin (22), first profile (211) down with profile (2211) constitutes down profile (24) down.
3. A drop straightening die for a wheel hub according to claim 2, wherein the lower die (2) further comprises a second drive means connected to the carrier rod (22), the second drive means being capable of driving the carrier rod (22) to reciprocate in a vertical direction.
4. A drop forging die for a wheel hub as claimed in claim 2, wherein a groove (213) is formed in the lower die core (21), the groove (213) is located above the first through hole (212), the first through hole (212) penetrates through the groove (213), a clamping protrusion (221) is arranged at one end of the top of the ejector rod (22), the clamping protrusion (221) is clamped with the groove (213), and the second lower profile (2211) is arranged on the clamping protrusion (221).
5. The hub direct forging die of claim 2, wherein the lower die (2) further comprises a lower die plate (23), the lower die core (21) is mounted on the lower die plate (23) and located above the lower die plate (23), the first driving device (4) is fixedly mounted on the lower die plate (23), the side die (3) is located above the lower die plate (23) and slidably connected with the lower die plate (23), a second through hole (231) is formed in the lower die plate (23), the first through hole (212) and the second through hole (231) are coaxially arranged, and one end of the bottom of the ejector rod (22) penetrates through the second through hole (231).
6. A drop straightening die for a wheel hub according to claim 5, wherein the lower die plate (23) and the lower die core (21) are of unitary construction.
7. A drop forging die for a wheel hub according to claim 2, wherein a first guide slope (61) is arranged on the die sleeve (6), a second guide slope (32) is arranged on the side die (3), and the first guide slope (61) and the second guide slope (32) can be attached.
8. A forging die for wheel hubs according to claim 1, further comprising a lock die sleeve backing plate (7), wherein said lock die sleeve (6) is fixed on said lock die sleeve backing plate (7), and said upper die (1) is inserted on said lock die sleeve backing plate (7) and is slidably connected with said lock die sleeve backing plate (7).
9. A forging process of a drop forging die of a wheel hub as claimed in any one of claims 1 to 8, comprising:
the first driving device (4) drives the side die (3) to be abutted with the lower die (2);
placing a pre-forging piece (200) of the hub in a cavity formed by the lower profile (24) and the side profile;
controlling the mold locking sleeve (6) to move downwards, sleeving the mold locking sleeve (6) on the periphery of the side mold (3), and pressing the side mold (3) on the lower mold (2);
pressure is applied to the upper die (1), the upper die (1) and the lower die (2) are clamped, and the pressure is maintained for T3.
10. The forging process of a drop forging die of a wheel hub according to claim 9, wherein the preparation method of the pre-forging piece (200) comprises:
preparing a blank (100);
placing the blank (100) onto a pre-forging lower die (9) of a pre-forging die;
and applying pressure on a pre-forging upper die (8) of the pre-forging die to enable the pre-forging upper die (8) to descend, closing the pre-forging upper die (8) and the pre-forging lower die (9), forging and pressing the blank (100) into a pre-forging piece (200), and maintaining the pressure for T1.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111745121A (en) * | 2020-06-29 | 2020-10-09 | 东北大学 | High-formability forging method and device for magnesium alloy hub |
| CN112893746A (en) * | 2020-08-30 | 2021-06-04 | 郎溪友良锻造铝合金轮毂股份有限公司 | Go up mould subassembly, lower mould subassembly and wheel hub die carrier |
| CN113941678A (en) * | 2020-07-15 | 2022-01-18 | 安徽弈华重工科技股份有限公司 | Forging process for warm forging and cold extrusion and die thereof |
| CN114043181A (en) * | 2022-01-07 | 2022-02-15 | 宁波润程智能科技有限公司 | Lightweight hub forging method |
| CN114472778A (en) * | 2022-01-25 | 2022-05-13 | 浙江巨丰模架有限公司 | Wheel hub forges mold base for new energy automobile |
| CN114535485A (en) * | 2022-02-12 | 2022-05-27 | 靳佳欣 | Forging die of forging |
| CN115229112A (en) * | 2022-06-14 | 2022-10-25 | 河南富亿达汽配股份有限公司 | Disk pre-forging die for vehicle |
| CN116274844A (en) * | 2023-03-01 | 2023-06-23 | 江苏珀然股份有限公司 | Fixing device for forging automobile hub |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111745121A (en) * | 2020-06-29 | 2020-10-09 | 东北大学 | High-formability forging method and device for magnesium alloy hub |
| CN113941678A (en) * | 2020-07-15 | 2022-01-18 | 安徽弈华重工科技股份有限公司 | Forging process for warm forging and cold extrusion and die thereof |
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| CN112893746A (en) * | 2020-08-30 | 2021-06-04 | 郎溪友良锻造铝合金轮毂股份有限公司 | Go up mould subassembly, lower mould subassembly and wheel hub die carrier |
| CN114043181A (en) * | 2022-01-07 | 2022-02-15 | 宁波润程智能科技有限公司 | Lightweight hub forging method |
| CN114472778A (en) * | 2022-01-25 | 2022-05-13 | 浙江巨丰模架有限公司 | Wheel hub forges mold base for new energy automobile |
| CN114535485A (en) * | 2022-02-12 | 2022-05-27 | 靳佳欣 | Forging die of forging |
| CN115229112A (en) * | 2022-06-14 | 2022-10-25 | 河南富亿达汽配股份有限公司 | Disk pre-forging die for vehicle |
| CN116274844A (en) * | 2023-03-01 | 2023-06-23 | 江苏珀然股份有限公司 | Fixing device for forging automobile hub |
| CN116274844B (en) * | 2023-03-01 | 2023-10-20 | 江苏珀然股份有限公司 | Fixing device for forging automobile hub |
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