KR101444934B1 - Device for manufacturing aluminium wheel using hot foging - Google Patents

Abstract

The present invention relates to a hot forged wheel manufacturing apparatus for a commercial vehicle, and more particularly, to a hot forging and cold flow forming process, The present invention relates to an aluminum wheel manufacturing apparatus.
That is, the present invention improves the manufacturing facility so as to proceed to the cold-type flow forming step of forming the rim portion of the aluminum wheel immediately after the hot forging step in which the aluminum material is made into the approximate aluminum wheel shape To provide a method for manufacturing an aluminum wheel for a commercial vehicle, which is capable of simplifying a process, reducing costs, and improving productivity.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an aluminum wheel manufacturing apparatus for a forged commercial vehicle,

The present invention relates to a hot forged wheel manufacturing apparatus for a commercial vehicle, and more particularly, to a hot forging and cold flow forming process, The present invention relates to an aluminum wheel manufacturing apparatus.

Generally, aluminum wheels for commercial vehicles (buses and trucks) are mounted on brake drums or discs of a vehicle, and serve as mounting seats for the tires. Design surfaces (spoke portions) and flange portions are formed on the front surface A rim portion on which a tire is mounted, and a hub portion for coupling the axle and the hub connected to the rim portion is formed on one side of the rim portion.

The aluminum wheel is manufactured by a gravity casting method, a low pressure casting method, a differential pressure casting, a vacuum suction casting, a die casting, a squeeze casting method, etc. In order to secure the integrity of a casting, Wheel manufacturers have adopted low-pressure casting technology.

However, the aluminum wheel by the gravity casting method and the aluminum wheel by the low-pressure casting method are advantageous from the viewpoint of the manufacturing cost, but they are difficult to increase in strength and are difficult to be further reduced in weight, and the low pressure casting method is suitable for mass production of aluminum wheels and small parts manufacturing However, since it is difficult to secure reliability because of its strength and toughness, there is a drawback that it is very disadvantageous as a method for developing lightweight parts.

Therefore, some companies have realized a weight reduction of 15% compared to low-pressure casting by utilizing molten casting technique or vacuum vacuum casting technique, but the quality is lower than forging technique.

Accordingly, aluminum disk wheels have been manufactured using a hot forging method in accordance with the tendency of the aluminum wheel manufacturing method being converted to a forging method having a high unit cost but a relatively high quality.

The hot forging method is a plastic working method in which a billet is pressurized with a large press to produce a roughly shaped material. The metal structure is stretched by pressing, and small micropores are pressed to minimize defects, Can be increased.

An example of a conventional method of manufacturing an aluminum wheel using a hot forging method includes: preheating an aluminum material to 350 to 400 ° C in a separate preheating furnace, as shown in FIG. 1; A hot forging step of making the preheated material into a rough aluminum wheel shape; A rim forming process for forming a rim of a hot forged aluminum wheel, comprising: performing swaging at a temperature of 150 to 200 캜; Performing a T6 heat treatment on the swaged aluminum wheel; CNC machining of detailed parts for precision machining of aluminum wheels; A pretreatment step and a surface coating step which are post-processes; This is done in the order of the final process, inspection and shipping.

However, the swaging process including the necking (reduction of the diameter of the rim portion) and the CNC processing is performed to form the rim of the hot-forged aluminum wheel, so that a large amount of aluminum material is discarded, And the weight reduction is not achieved.

Another example of a conventional method for manufacturing an aluminum wheel using a hot forging method includes the steps of first preheating aluminum material to 350 to 400 占 폚 in a separate preheating furnace as shown in Fig. A hot forging step of making the preheated material into a rough aluminum wheel shape; Further preheating the hot forged aluminum wheel to 310 to 400 DEG C again in a separate preheating furnace to flow form; A flow forming step of forming a rim portion of an aluminum wheel includes a flow forming step of pressing a rim portion of a second preheated aluminum wheel to reduce the rim portion to a designed thickness and extending to a designed width; Performing a T6 heat treatment on the flow-formed aluminum wheel; CNC machining of detailed parts for precision machining of aluminum wheels; A pretreatment step and a surface coating step which are post-processes; This is done in the order of the final process, inspection and shipping.

However, since the aluminum material is first preheated for hot forging, and then the hot forged product is again preheated by the secondarily heated hot forging process, the manufacturing process is increased and the productivity is lowered, the manufacturing process cost is increased, In addition, since the equipment must be equipped with a separate secondary preheating, the equipment cost is increased.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a cold flow forming method of forming a rim portion of an aluminum wheel immediately after a hot forging step, The present invention provides an apparatus for manufacturing an aluminum wheel for a commercial vehicle, which is capable of simplifying the manufacturing process and reducing the manufacturing cost, and improving the productivity.

In order to accomplish the above object, the present invention provides a robot transfer device for transferring a hot forged aluminum wheel directly to an aluminum wheel grip for cold flow forming, after a hot forging step of making an aluminum material into a rough aluminum wheel shape, Wow; A mandrel attached to the inner surface of the hot forged aluminum wheel and fixed to the outer surface of the aluminum wheel disposed on the fitting side of the mandrel and a rotary shaft provided on the mandrel and the tail wheel, An aluminum wheel grasp portion including a rotation driving portion for rotating the aluminum wheel grasp portion together; The cold flow forming is carried out directly on the aluminum wheel after the hot forging held on the mandrel and the tailstock by being symmetrically arranged on the right and left sides of the mandrel, and the rim portion of the aluminum wheel is pressed A fluidized mold roller which forms the mold so that the rim portion is reduced to the designed thickness and extends to the designed width; Roller driving means for moving the fluidized mold roller in the X-axis or Y-axis direction in accordance with a signal from the control unit in a state in which the fluidized mold roller is mounted; The present invention also provides an apparatus for manufacturing an aluminum for a commercial vehicle.

As a preferred embodiment of the present invention, a flame torch for spraying a flame on the aluminum wheel is mounted on the upper surface of the housing of the rotary drive portion of the mandrel so as to continuously maintain the temperature of the aluminum wheel fixed to the mandrel at the temperature after completion of hot forging .

In particular, the roller driving means comprises: an X-axis block rotatably mounted on the front end portion thereof with a fluidizable mold roller; A sliding rail part mounted on a bottom surface of the X-axis block; A Y-axis block integrally connected to the bottom of the X-axis block and for traversing the X-axis block in the Y-axis direction; A Y-axis block driver connected to the bottom of the Y-axis block and driving the Y-axis block in the Y-axis direction; A hydraulic cylinder connected to a rear portion of the X-axis block and providing a forward pressing force in the X-axis direction to the X-axis block; And a control unit.

Preferably, the hydraulic cylinder is adapted to produce a pressing force of 50t class so that the pressing force against the aluminum wheel of the fluid molding roller mounted on the X-axis block is 50tf / cm 2 at maximum.

A lubricant spraying nozzle for spraying a lubricant to the mandrel is mounted at a front portion of the upper surface of the X-axis block so that lubricating contact is established between the surface of the mandrel and the aluminum wheel.

The present invention provides the following effects through the above-mentioned problem solving means.

According to the present invention, unlike the conventional method in which the preheating for hot forging is performed and the second preheating is performed for hot flow forming again, after the hot forging step in which the aluminum material is made into a rough aluminum wheel shape, The process proceeds to a cold flow forming step in which the rim portion of the aluminum wheel is immediately formed without preheating, so that the preheating process and equipment for the hot forged aluminum wheel are unnecessary, thereby simplifying the process and reducing the cost.

In addition, the productivity can be improved by shortening the flow forming process time in accordance with the process simplification.

In addition, since the preheating facility is unnecessary, the facility area can be secured and the space utilization can be increased.

1 and 2 are process drawings showing a conventional method of manufacturing a hot forged aluminum wheel,
3 is a process diagram showing a method of manufacturing an aluminum wheel for hot forging commercial vehicle according to the present invention,
FIG. 4 is a schematic view showing a robot transfer part of an aluminum wheel manufacturing apparatus for a commercial forged commercial vehicle according to the present invention,
5 is a schematic view showing a flow forming portion of an apparatus for manufacturing an aluminum wheel for hot forging commercial vehicle according to the present invention.
6 is a schematic view showing a flow forming roller for flow forming of an apparatus for manufacturing an aluminum wheel for hot forging commercial vehicle according to the present invention,
7 is a schematic view showing a hydraulic drive unit for a flow forming roller for flow forming of an apparatus for manufacturing an aluminum wheel for hot forging commercial vehicle according to the present invention,
8 is a schematic view showing a flow forming process of the apparatus for manufacturing an aluminum wheel for hot forging commercial vehicle according to the present invention,
9 is a view showing the shape of a hot forging front hot forged aluminum wheel for a commercial forged commercial vehicle according to the present invention and an image showing a state after flow forming,
10 is a schematic cross-sectional view showing another embodiment of the lubricant jetting nozzle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a process diagram showing a method for manufacturing an aluminum wheel for a commercial forged vehicle according to the present invention.

The present invention is directed to a cold-type flow forming step of forming a rim portion of an aluminum wheel immediately after a hot forging step of making an aluminum material into a rough aluminum wheel shape without a separate second preheating.

First, a first preheating step is carried out at 350 to 400 占 폚 in order to subject the aluminum material to hot forging. The heating temperature at this time is one example, and the aluminum material is heated to a suitable temperature for hot forging.

Next, a hot forging step is carried out to make the preheated material into a rough aluminum wheel shape.

For example, after cutting an aluminum material to a predetermined size, the cut material is first preheated at 350 to 400 ° C in a heating furnace, and then forged using a predetermined press to obtain an approximate aluminum wheel-shaped hot forging product I make it.

Next, the hot forged aluminum wheel is subjected to cold-type flow forming in which the rim portion is formed immediately after the second preheating is excluded.

For this purpose, the hot forged aluminum wheel is clamped using a conventional robot transfer device 130, and then immediately transferred to the flow forming device 100.

The robot transfer device 130 clamps the hot forged aluminum wheel after the hot forging step for making the aluminum material into an approximate aluminum wheel shape, and immediately transfers the clamped aluminum wheel to the aluminum wheel gripping part of the cold type flow forming device .

The robot transfer device 130 includes a fork portion 132 for clamping and lifting both sides of the aluminum wheel to transfer the aluminum wheel to the aluminum wheel holding portion.

At this time, the hot forged aluminum wheel is transported by the robot transfer device 130, and is then mounted so as to flow-form directly to the aluminum grip portion of the flow forming device 100.

The aluminum gripping part includes a mandrel 110 fixedly fixed to the inner diameter surface of the hot forged aluminum wheel 200, a tailstock 112 disposed in the fitting part of the mandrel 110 and fixedly attached to the outer surface of the aluminum wheel, And a rotation driving part 114 connected to the mandrel 110 to rotate the aluminum wheel 200 by providing a rotational force to the mandrel 110 and the tailstock 112 .

When the hot forged aluminum wheel is directly mounted on the mandrel 12, the flow forming is performed by the X-axis and Y-axis pressing movements of the fluidizing mold roller 120.

The flowable mold rollers 120 are symmetrically arranged on the left and right sides of the mandrel 110 so as to perform cold flow forming on the aluminum wheel 200 after the hot forging held by the mandrel 110 and the tailstock 112 It plays a role of direct execution.

That is, the fluidized mold roller 120 presses the rim portion 202 of the aluminum wheel 200 while moving in the X and Y axis directions to reduce the rim portion 202 to the designed thickness and to perform the flow forming so as to extend to the designed width. .

At this time, the flowable mold roller 120 moves in the X axis direction or the Y axis direction by the roller driving means 140.

To this end, the roller driving means 140 includes an X-axis block 142 having a fluidized-form roller 120 rotatably mounted on a front end thereof for conveying the fluidized-form roller 120 in the X-axis direction, A sliding rail part 144 mounted on the bottom of the X axis block 142 and a hydraulic cylinder 148 connected to the rear part of the X axis block 142 for providing a forward pressing force in the X axis direction to the X axis block 142 ).

Particularly, the hydraulic cylinder 148 adopts a pressure output of 50 t so that the pressing force of the fluid-forming roller 120 mounted on the X-axis block 142 against the aluminum wheel 200 is 50 tf / This is because when the cold-type flow forming in which the aluminum wheel immediately after the hot forging step is flow-formed is performed, the pressing force of the fluid type roller for plastic working of the aluminum wheel must be increased as the second preheating process is omitted.

The roller driving means 140 is integrally connected to the bottom of the X-axis block 142 to move the X-axis block 142 in the Y-axis direction And a Y-axis block driver 147 connected to the bottom of the Y-axis block 146 to drive the Y-axis block 146 in the Y-axis direction.

Accordingly, the X-axis block 142 is advanced by the driving force of the hydraulic cylinder 148, and at the same time, the flowable mold roller 120 mounted on the front end of the X-axis block 142 is pressed against the aluminum The Y-axis block 146 is moved by the Y-axis block driver 147 so that the rim portion 202 of the aluminum wheel 200 is reduced to the designed thickness by pushing the rim portion 202 of the wheel 200, A cold flow forming step in which the width is simultaneously increased to the designed width is performed.

A flame torch 150 for spraying a flame on the aluminum wheel 200 is mounted on the upper surface of the housing of the rotation driving part 114 for rotating the mandrel 110 when the flow forming process is performed on the aluminum wheel .

The flame torch 150 serves to spray the flame on the aluminum wheel 200 to continuously maintain the temperature of the aluminum wheel 200 after the hot forging, which is fixed to the mandrel 110, at a temperature after hot forging.

When the flow forming process is performed on the aluminum wheel in the front portion of the X-axis block 142, the lubrication contact between the surface of the mandrel 110 and the aluminum wheel 200 A lubricant injection nozzle 160 for injecting a lubricant is mounted.

According to the present invention, when the temperature of the aluminum wheel is lowered to the range of 50 to 150 ° C. after the completion of the hot forging step, when the temperature of the aluminum wheel is maintained in the range of 50 to 150 ° C., It is possible to exclude the process of preheating the hot-forged aluminum wheel to the second heat again and the preheating facility for the hot flow forming process.

In other words, conventionally, the hot forged aluminum wheel is secondarily preheated to 310 to 400 ° C for the hot-type flow forming. However, according to the present invention, after the completion of the hot forging step, the temperature of the aluminum wheel is 50 to 150 ° C, the cold forming step is performed immediately, thereby eliminating the process of preheating the hot-forged aluminum wheel to the second degree and the preheating facility for the flow forming process of the hot cushion.

Preferably, as described above, when the hydraulic cylinder 148 is employed as a high output, cold flow forming in which the aluminum wheel immediately after the hot forging step is flow-formed is performed, owing to the omission of the secondary preheating process, The pressing force of the fluidized mold roller 120 for the plastic working of the mold is easily increased.

That is, in the flow forming of the conventional hot method, since the aluminum wheel is raised again to a smooth temperature by the second preheating after the hot forging, the forming process such as the aluminum thickness is reduced as the aluminum wheel is flow- The cold flow forming method of the present invention increases the pressing force of the fluidized mold roller 120 for plastic working of the aluminum wheel as the hot forged aluminum wheel 200 is flow formed directly without secondary preheating .

Therefore, when the fluidized mold roller 120 presses the rim portion 202 of the hot-forged aluminum wheel 200, the pressing output of the fluidized mold roller 120 can be increased up to 50t.

Thus, after the hot forging step, the temperature of the aluminum wheel is maintained in the range of 50 to 150 DEG C, which enables plastic working, and by increasing the pressing output of the flowable mold roller 120 to a maximum of 50 t, The rim portion is pressed and the rim portion is reduced to the designed thickness, and at the same time, the plastic working extending to the designed width can be smoothly performed.

In order to increase the tensile strength of the aluminum material, one of Al 6061, 6082, 6151, 6060 and 6000 series can be selected. Also, after the hot forging step, the pressing force of the fluidized- 50t, so that it is possible to smoothly plasticize the fluidized mold roller. Therefore, it is possible to select Al 7075 and 7000 series material having almost carbon steel strength.

Then, the step of performing T6 heat treatment on the flow-formed aluminum wheel as described above is proceeded.

For example, the T6 heat treatment step may be performed at a critical temperature of 160 ° C to 195 ° C for a critical time of 2 to 5 hours, so that smooth precipitation and hardness of the aluminum alloy structure can be obtained.

Next, in order to precisely shape the aluminum wheel, surface processing such as machining of hub holes and bolt holes is performed through CNC machining of detailed parts, and pre-processing and surface coating steps are performed , Final aluminum wheel products for commercial vehicles, and then final inspection and shipment is done.

On the other hand, the lubricant spraying nozzle 160 has a vortex shape as shown in Fig.

The vortex-shaped lubricant injection nozzle 160 includes a coupling portion 161 provided with a thread for coupling with the hose, a hollow conical body 162 integrally extended downward from the coupling portion 161, A spiral guide 163 for guiding the spraying direction of the lubricant coming out from the jetting port 163 along the spiral direction on the outer surface of the conical body 162 so as to guide the spouting direction of the lubricant coming out from the jetting port 163 in a spiral direction, And a groove 164.

Particularly, the vortex type lubricant injection nozzle 160 is a means for rotating the injected lubricant with a strong lubricant injection force. At the upper end of the lubricant injection nozzle 160, a coupling portion 161 having a screw thread is formed to be fastened to the hose. A hollow conical body 162 is integrally formed to extend downwardly from the conical body 162. The conical body 162 is formed with a plurality of injection ports 163 through which lubricant is finally injected along the spiral direction.

A spiral guide groove 164 is formed on an outer surface of the conical body 162 so as to coincide with a jetting port 163 arranged in a spiral direction. The guide groove 164 is formed by jetting a lubricant jetted from the jetting port 163 Direction in the spiral direction to form a vortex.

The lubricant injected through the helical injection port 163 and the helical guide groove 164 of the lubricant injection nozzle 160 rotates and forms a vortex while spraying the lubricant to the mandrel 110, have.

The lubricant spraying nozzle 160 is preferably made of spheroidal graphite cast iron.

Spheroidal graphite cast iron is spheroidal graphite in comparison with gray cast iron because graphite is sphere-shaped cast iron in the solidification process by adding magnesium and the like to the molten metal of Ivan gray cast iron. Such spheroidal graphite cast iron has less notch effect, so stress concentration phenomenon is reduced, and strength and toughness are greatly improved.

The lubricant spraying nozzle 160 according to the present invention is formed by heating spheroidal graphite cast iron to 1520 to 1580 ° C to make a molten metal, then subjecting it to desulfurization treatment, adding spheroidizing agent containing magnesium in an amount of 0.3 to 0.7% Followed by heat treatment.

Here, when the spheroidal graphite cast iron is heated to less than 1520 DEG C, the entire structure is not sufficiently melted, and when it is heated above 1580 DEG C, unnecessary energy is wasted. Therefore, it is preferable to heat the spheroidal graphite cast iron to 1520 to 1580 캜.

If the molten spheroidal graphite cast iron contains 0.3 to 0.7% of magnesium, the addition of the spheroidizing agent is insignificant. If the magnesium content is less than 0.3%, the effect of the spheroidizing agent is negligible. If the magnesium content exceeds 0.7% , While the cost of expensive materials is increased. Therefore, the mixing ratio of magnesium in the spheroidizing agent is preferably about 0.3 to 0.7%.

When the spheroidizing treatment agent is injected into the molten spheroidal graphite cast iron, it is spheroidized at 1455 ~ 1495 ℃. If the spheroidizing treatment temperature is lower than 1455 ° C, the spheroidizing treatment is not performed properly. If the spheroidizing treatment temperature is higher than 1495 ° C, the spheroidizing treatment effect is not greatly improved, but unnecessary energy is wasted. Therefore, the spheroidization treatment temperature is preferably 1455 to 1495 ° C.

On the other hand, a coating layer is formed around the mandrel 110. The reason why the ceramic 110 is coated with a ceramic is that corrosion prevention is the main purpose. Compared to chrome plating or nickel chrome plating, the ceramic coating is excellent in corrosion resistance, scratch resistance, abrasion resistance, impact resistance and durability.

This coating layer is formed by spraying a powder composed of 96 to 98% of chromium oxide (Cr ₂ O ₃ ) and ₂ to 4% of titanium dioxide (TiO ₂ ) in the periphery of the mandrel 110.

Chromium oxide (Cr ₂ O ₃ ) acts as a passivity layer to block oxygen entering the inside of the metal, thereby preventing rusting.

Titanium dioxide (TiO ₂ ) is a white pigment because it is very stable physicochemically and has high hiding power. And is also widely used for ceramics having high refractive index because of high refractive index. And has characteristics of photocatalytic property and superhydrophilic property. Titanium dioxide (TiO ₂ ) acts as an air purification function, an antibacterial function, a harmful substance decomposition function, a pollution prevention function, and a discoloration prevention function. This titanium dioxide (TiO ₂ ) ensures that the coating layer is wrapped around the mandrel 110 and disassembles and removes foreign matter adhered to the mandrel 110 to prevent damage to the mandrel 110.

Here, chromium oxide (Cr ₂ O ₃₎ and when using hayeoseo mixing titanium dioxide (TiO _2), the mixing ratio of these is a chromium oxide (Cr ₂ O ₃₎ Titanium dioxide (TiO ₂₎ 2~ to 96-98% 4% are mixed.

When the mixing ratio of chromium oxide (Cr ₂ O ₃ ) is less than 96 to 98%, the coating of chromium oxide (Cr ₂ O ₃ ) is often broken in an environment such as a high temperature, ) Of the rust preventive effect was decreased.

When the mixing ratio of titanium dioxide (TiO ₂ ) is less than 2 to 4%, the effect of titanium dioxide (TiO ₂ ) is insignificant so that the purpose of mixing it with chromium oxide (Cr ₂ O ₃ ) is discolored. That is, titanium dioxide (TiO ₂ ) dissolves and removes foreign matter adhering to the periphery of the mandrel 110 to prevent the mandrel 110 from being corroded or damaged. When the mixing ratio is less than 2 to 4% , There is a problem that it takes a long time to decompose the attached foreign matter.

Therefore, since the coating layer having excellent oxidation resistance is formed around the mandrel 110 frequently exposed to the outside, the oxidation of the mandrel 110 is prevented, the safety of the mandrel 110 is prevented by preventing the oxidation of the mandrel 110, As a result, the life of the wheel manufacturing apparatus is prolonged, and maintenance and repair costs are reduced.

100: flow forming device
110: Mendral
112:
114:
120: fluidized mold roller
130: Robot transfer device
132: fork part
140: roller driving means
142: X axis block
144: sliding rail part
146: Y-axis block
147: Y-axis block driver
148: Hydraulic cylinder
150: Flame Torch
160: Lubricant spray nozzle
200: Aluminum wheel
202: limb

Claims (5)

(132) for lifting an aluminum wheel for hot forging an aluminum material into an aluminum wheel shape and for transferring a hot forged aluminum wheel directly to an aluminum wheel gripping portion for cold flow forming 130);
A mandrel 110 to be closely fixed to the inner surface of the hot forged aluminum wheel 200, a tailstock 112 which is disposed on the fitting side of the mandrel 110 and fixedly attached to the outer surface of the aluminum wheel, An aluminum wheel grasping portion including a rotation driving portion 114 for rotating the aluminum wheel 200 by providing rotational force to the steering wheel 110 and the tailstock 112;
The cold flow forming is directly performed on the aluminum wheel 200 after the hot forging held by the mandrel 110 and the tailstock 112 by symmetrically arranging the left and right sides of the mandrel 110, A flowable mold roller 120 for pressing the rim portion 202 of the aluminum wheel 200 while moving in the Y-axis direction to reduce the rim portion 202 to a designed thickness and to form a shape so as to extend to a designed width;
And roller drive means (140) for moving the fluidity-imparting roller (120) in the X-axis or Y-axis direction in response to a signal from the control unit when the fluidity-applying roller (120) is mounted;
The roller driving means 140 includes:
An X-axis block 142 rotatably mounted on the front end of the movable mold roller 120;
A sliding rail part 144 mounted on the bottom surface of the X-axis block 142;
A Y-axis block 146 integrally connected to the bottom of the X-axis block 142 to feed the X-axis block 142 in the Y-axis direction;
A Y-axis block driver connected to the bottom of the Y-axis block 146 to drive the Y-axis block 146 in the Y-axis direction;
A hydraulic cylinder 148 connected to the rear portion of the X-axis block 142 to provide a forward pressing force in the X-axis direction to the X-axis block 142;
And an upper surface of the aluminum wheel.
The method according to claim 1,
The aluminum wheel 200 is fixed to the upper surface of the housing of the rotation driving part 114 for rotating the mandrel 110 to maintain the temperature of the aluminum wheel 200 fixed to the mandrel 110 at a temperature after completion of hot forging, And a flame torch (150) for spraying a flame on the flame.
delete The method according to claim 1,
The hydraulic cylinder 148 is adapted to provide a pressing force of 50t class so that the pressing force applied to the aluminum wheel 200 of the fluid molding roller 120 mounted on the X axis block 142 is 50tf / Characterized in that the aluminum wheel manufacturing apparatus for hot forging commercial vehicle.
The method according to claim 1,
A lubricant spraying nozzle 160 for spraying a lubricant to the mandrel 110 is mounted at a front portion of the upper surface of the X-axis block 142 so as to make a lubricating contact between the surface of the mandrel 110 and the aluminum wheel 200 Wherein the heat-forged aluminum wheel manufacturing apparatus for a commercial for-forged commercial vehicle is manufactured.

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