KR101627878B1 - Die for forging rotor material and method for forging rotor material - Google Patents

Die for forging rotor material and method for forging rotor material Download PDF

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KR101627878B1
KR101627878B1 KR1020107028951A KR20107028951A KR101627878B1 KR 101627878 B1 KR101627878 B1 KR 101627878B1 KR 1020107028951 A KR1020107028951 A KR 1020107028951A KR 20107028951 A KR20107028951 A KR 20107028951A KR 101627878 B1 KR101627878 B1 KR 101627878B1
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South Korea
Prior art keywords
hole
forging
mold
center
blade portion
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KR1020107028951A
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Korean (ko)
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KR20110027709A (en
Inventor
히데미 야마다
다이스께 엔도
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쇼와 덴코 가부시키가이샤
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/25—Manufacture essentially without removing material by forging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors

Abstract

An object of the present invention is to efficiently manufacture a rotor material. A mold for casting a cylindrical rotor material having a center hole (3) and a vane groove (4), which is provided with a lower mold (10) and an upper mold (30) . The lower mold 10 has a blade portion 13 for forming a vane groove protruding into the molding hole and a center pin 16 for center hole molding disposed at the center of the molding hole. The upper mold 30 includes an upper mold main body 31 for applying a main pressure to portions other than the center pin 16 and the blade portion 13 of the lower mold 10, A back pressure pin 40 that is movably inserted into the center pin corresponding hole 35 to apply the first partial pressure to the center pin 16 and a blade portion corresponding hole 36 formed by perforating the upper mold body 31 And a back pressure plate 41 which is fitted in the front end portion of the blade portion 13 so as to be able to move back and forth so as to apply a second partial pressure to the blade portion 13. The front end surface of the blade portion 13 is made to coincide or spaced from the opening surface of the blade portion corresponding hole 36 at the time of fitting.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forging a rotor,

The present invention relates to a rotor forging mold and a rotor material forging method for manufacturing a rotor material having a vane groove in an outer peripheral portion.

Generally, a rotor of a compressor or a rotary vacuum pump for controlling a brake is formed with a plurality of vane grooves parallel to the axial center in the peripheral portion at equal intervals in the peripheral direction. In general, the rotor of an air-conditioning rotary compressor or a rotary vacuum pump for brake control mounted on an automobile is made of aluminum alloy as a mainstream for the purpose of weight reduction, and is manufactured using forging.

For example, in the rotor manufacturing method described in Patent Document 1, a bladed portion for forming a vane groove is formed in a molding hole of a lower mold, and a cylindrical forged material set on the molding hole is moved downward So that the forging material is filled in the molding hole. Thereby, a cylindrical rotor material is obtained in which the vane groove extends from the lower end face to the vicinity of the upper end face. Then, the upper end portion (excess thickness portion) of the rotor material is cut and removed along the plane orthogonal to the axial center by machining to open one end side (upper end side) of the vane groove to open both end portions of the vane groove, As a material.

Further, in the rotor manufacturing method described in Patent Document 2, a punch having a groove for forming a vane groove is provided on a molding surface of an upper mold, and a groove of the upper mold is formed in a forging material set in a molding hole of the lower mold And a vane groove is formed in the vicinity of the lower end surface from the upper end surface. Subsequently, a punch having a groove is formed, and an excess thickness portion closing the lower end of the vane groove is punched out to open both ends of the vane groove.

Japanese Patent Application Laid-Open No. 11-230068 Japanese Patent Application Laid-Open No. 2000-220588

In the conventional rotor manufacturing method disclosed in Patent Document 1, the excessive thickness portion of the rotor material obtained by the forging is cut off, but it is difficult to remove the excessive thickness portion, and the production efficiency may be lowered.

Further, in the conventional rotor manufacturing method described in Patent Document 2, the excessive thickness portion for closing the lower end of the vane groove is removed by punching with a punch having grooves. In general, punching is performed by accurately controlling the break position There is a high possibility that cracks or looses occur which are difficult to obtain and that the excess thickness portion can not be reliably removed.

The preferred embodiments of the present invention are made in view of the above-described and / or other problems in the related art. The preferred embodiments of the present invention can remarkably improve existing methods and / or apparatuses.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for forging a rotor material forging and a rotor material capable of surely removing an excessive thickness portion while securing a high production efficiency.

Other objects and advantages of the present invention will become apparent from the following preferred embodiments.

In order to achieve the above object, the present invention has the following configuration.

[1] A mold forging a substantially cylindrical rotor material having a center hole and a vane groove parallel to an axis on an outer peripheral portion, the upper mold including a lower mold and an upper mold for applying molding pressure,

Wherein the lower mold has a blade portion for forming a vane groove protruding into the forming hole and a center pin for forming a center hole disposed at the center of the forming hole,

The upper mold includes an upper mold main body for applying a main pressure to portions other than the center pin and the blade portion of the lower mold and a center pin corresponding hole formed in the upper mold main body A back pressure pin for applying a first partial pressure to the center pin and a rear portion corresponding to the blade portion so as to be retractably fitted in a hole corresponding to the blade portion formed in the upper mold body, Having a back pressure plate,

And the tip end face of the blade portion when the mold is fitted is aligned or spaced from the opening face of the blade portion corresponding hole.

[2] When the distance between the tip end face of the blade portion and the opening face of the blade portion corresponding hole at the time of die fitting is defined as an end face difference at the vane groove side, the difference in end face at the vane groove side is set to 0 to 2 mm A mold for forging a rotor material according to claim 1.

[3] A rotor material for forging as set forth in the item 1 or 2, wherein the clearance on the vane groove side is set to 0.01 to 0.1 mm when the clearance between the outer peripheral surface of the blade portion and the inner peripheral surface of the blade portion- mold.

[4] The mold for forging a rotor material as described in the item 3, wherein the clearance on the vane groove side is partially different.

[5] The mold for forging a rotor material forging according to the above item 3 or 4, wherein the clearance of at least one of the inner peripheral side end and the outer peripheral side end of the clearance on the vane groove side is set larger with respect to the clearance of the intermediate portion.

[6] A mold for forging a rotor material forging according to any one of the above items 1 to 5, wherein the front end face of the center pin is aligned or spaced from the opening face of the center pin-corresponding hole.

[7] When the distance between the distal end face of the center pin and the opening face of the center pin corresponding hole at the time of fitting is defined as the difference in end face at the center hole side, the difference in end face at the center hole side is 0 to 2 mm A mold for forging a rotor material as set forth in 6 above.

[8] The rotor according to item 6 or 7, wherein the clearance on the center hole side is set to 0.01 to 0.1 mm when the clearance between the outer peripheral surface of the center pin and the inner peripheral surface of the center pin- Mold for forging material.

[9] A mold for rotor material forging as set forth in [8], wherein a clearance on the center hole side is partially different.

[10] The apparatus as set forth in claim 1, further comprising: negative pressure applying means provided on the back pressure pin for applying a first negative pressure; and negative pressure applying means provided on the back pressure plate for applying a second negative pressure A mold for forging a rotor material according to any one of claims 1 to 9.

[11] The mold for forging a rotor material described in the item 10, wherein the negative pressure applying means is a gas cushion.

[12] A method of forging a substantially cylindrical rotor material having a center hole and a vane groove parallel to an axial line on an outer peripheral portion thereof,

A lower mold having a blade portion for forming a vane groove protruding into a forming hole and a center pin for center hole forming disposed at the center of the forming hole is prepared,

An upper mold main body for applying a main pressure to a portion other than the center pin and the blade portion of the lower mold and a center pin corresponding hole formed in the upper mold main body, And an upper mold having a back pressure plate that is retractably fitted in a hole corresponding to the blade portion formed in the upper mold body so as to apply a second partial pressure to the upper mold body,

Wherein the front end face of the blade portion is aligned with or spaced from the opening face of the blade portion corresponding hole at the time of fitting.

[13] A method of forging a rotor material as described in the item 12, wherein the front end face of the center pin is aligned with or spaced from the opening face of the center pin corresponding hole at the time of fitting.

[14] The method of forging a rotor material as described in [12] or [13], wherein the first partial pressure and the second partial pressure are respectively 29 to 89 MPa.

[15] A method of forging a rotor material as described in any one of [12] to [14], wherein the first and second negative pressures are independently controlled.

[16] A method of forging a rotor material as described in any one of [12] to [15], wherein a first section pressure is reduced as a cross-sectional area of the center pin is increased.

[17] The method of forging a base material as described in any one of items 12 to 16, wherein the rotor material is aluminum or an aluminum alloy.

According to the mold for rotor material forging according to the invention [1], since the rotor material in which the one end face of the vane groove is disposed further inside than the end face of the rotor portion can be obtained, the difference in diameter between the inner peripheral face of the vane groove and the outer peripheral face of the excess thickness portion can be made small can do. As a result, the excess thickness portion on the side of the vane groove can be easily and reliably removed, and the production efficiency can be improved.

According to the mold for forging a rotor material of the invention [2] [3], the above effect can be reliably obtained.

According to the mold for rotor material forging of the invention [4] [5], it is possible to prevent the excess thickness portion from being inadvertently dropped off.

According to the mold for rotor material forging according to the sixth aspect of the invention, since a work piece made of a rotor material in which one end surface of the center hole is located further inside than the end surface of the rotor portion can be obtained, the diameter difference between the inner circumferential surface of the center hole and the outer circumferential surface Can be made small. This makes it possible to easily and reliably remove excess thickness on the side of the center hole, thereby further improving the production efficiency.

According to the mold for forging a rotor material of the invention [7] [8], the above effect can be more reliably obtained.

According to the mold for rotor material forging of the invention [9], it is possible to prevent the excess thickness on the center hole side from being inadvertently dropped off.

According to the mold for forging the rotor material of the invention [10] [11], the flexural deformation and the twist deformation of the center pin and the blade portion can be suppressed.

According to the forging method of the rotor material of the invention [12], the same action and effect as described above can be obtained.

According to the forging method of the rotor material of the inventions [13] and [14], the above effect can be more reliably obtained.

According to the forging method of the rotor material of the invention [15], the first and second negative pressures can be individually set to the center pin and the blade portion according to the shape and size, and the metal flow And the force for deforming the blade portion inward can be more reliably maintained.

According to the forging method of the rotor material of the invention [16], the above effect can be obtained more reliably.

According to the forging method of the rotor material described in the invention [17], the rotor material of aluminum or aluminum alloy excellent in dimensional accuracy can be forged with good yield.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view explaining a mold for forging a rotor material according to an embodiment of the present invention. Fig.
Fig. 2 (a) is a schematic cross-sectional view at the forging preparation step in the forging process by the forging mold of the embodiment; Fig.
Fig. 2B is a schematic cross-sectional view at the upper mold lowering step in the forging process by the forging mold of the embodiment; Fig.
Fig. 2C is a schematic cross-sectional view at the completion of machining in the forging process by the forging die of the embodiment; Fig.
Fig. 2 (d) is a schematic cross-sectional view at a workpiece taking-out step in a forging process by the forging die of the embodiment.
Fig. 3 is a perspective view showing a rotor material obtained by forging in the embodiment; Fig.
4 is a perspective view showing a rotor manufactured by a manufacturing method of an embodiment;
5 is a plan view showing an offset amount of a vane groove in a rotor material;
6 is a perspective view showing an upper mold in an assembled state in the forging mold according to the embodiment;
7A is a partially cut-away perspective view showing a state where a pressure is applied to a lower mold in a forging mold.
Fig. 7B is a view for explaining the metal flow in the forging process in the forging mold. Fig.
8A is a plan view of a rotor material in the embodiment;
FIG. 8B is a plan view showing an enlarged view of a vane groove portion of the rotor material in the embodiment; FIG.
9 is a flow chart showing a process procedure in the production method of the embodiment.
10 is a cross-sectional view showing the rotor material of the embodiment cut out from the center hole portion.
11 is a cross-sectional view showing the rotor material of the embodiment cut out from the vane groove portion.
12 is an enlarged cross-sectional view of a portion surrounded by a chain double-dashed line in Fig. 10;
13A is an enlarged cross-sectional view of a portion surrounded by a two-dot chain line in Fig. 11; Fig.
13B is a cross-sectional view enlargedly showing a periphery of a vane groove portion in the rotor material of the embodiment in a state in which an excess thickness portion is removed.
14 is a cross-sectional view schematically showing a punching device used in an excess thickness portion removing step in the manufacturing method of the embodiment;

<Rotor>

First, the configuration of the rotor R according to the embodiment of the present invention will be described. As shown in FIG. 4, the rotor R is a substantially cylindrical body having a center hole 3 as a shaft hole through which the shaft passes, and on the outer circumferential surface thereof, five vane grooves 4 are formed. These vane grooves 4 are formed so as to be parallel to the axis of the cylinder and penetrate both end faces and to be eccentrically inserted into the center hole 3 and to be inserted inward. 5, the offset amount U of the vane groove 4 is set such that the offset amount U of the vane groove 4 is substantially equal to the center line L1 in the groove width direction, And the straight line L2.

As the material of the rotor (R), aluminum or an aluminum alloy is generally used. Examples thereof include 14 to 16 mass% of Si, 4 to 5 mass% of Cu, 0.45 to 0.65 mass% of Mg, 0.5 mass% 0.1 mass% or less of Mn, and 0.2 mass% or less of Ti, and the balance being aluminum and unavoidable impurities.

<Manufacturing process>

As shown in Fig. 9, the rotor manufacturing process mainly includes a cutting process, a mass selecting process, a forging process, a punching process, a heat treatment process, and an inspection process.

The cutting step and the mass selecting step are steps for obtaining a forging material. In the cutting step, the continuous casting material is cut to a predetermined length to obtain a continuous casting material having a predetermined length, and then each casting material is weighed Therefore, the desired forging material is obtained by sorting.

Subsequently, in the forging process, the forged material is forged to obtain a rotor material, and in the punching step, the excess thickness portion is removed from the rotor material to obtain the rotor (R).

Thereafter, in the heat treatment step, the rotor (R) is subjected to a heat treatment and a quenching treatment to improve the hardness and wear resistance to obtain a rotor product. Then, the final inspection is carried out in the inspection process. If there is no abnormality, the product is shipped.

Hereinafter, the rotor manufacturing method based on the present embodiment will be described in detail.

<Forging process>

Fig. 1, Figs. 2A to 2D are views showing a forging die as a forging device used for forging in this embodiment, and Fig. 3 is a view showing a rotor material 1 forged by the forging die .

As shown in these drawings, the forging die includes a lower die 10 as a die and an upper die 30 as a punch for giving molding pressure. As these mold materials, well-known steels for molds are used.

The lower mold 10 includes a lower mold main body 11 having a molding hole 12, a base 15 disposed below the lower mold main body 11, and a base 15 disposed on the upper side of the lower mold main body 11 And is divided into a bush 19.

Five blades 13 for forming the vane grooves 4 protrude from the inner peripheral wall surface in the molding hole 12 of the lower mold body 11. [ The blade portion 13 corresponds to the sectional shape of the vane groove 4 and has a thin plate shape having a circular portion at an end portion. The center pin 16 for fixing the center hole 3 of the rotor R is fixed to the center of the base 15. The center pin 16 A through hole 18 is formed. The bush 19 is a ring-shaped body having a loading hole 20 which penetrates vertically through the same diameter as the forming hole 12 of the lower mold body 11. [

When the base 15, the lower mold body 11 and the bush 19 are assembled and attached, the center pin 16 is inserted into the molding hole 12 of the lower mold body 11, The charging hole 20 of the bush 19 is communicated with the molding hole 12. In addition, 2A, the knockout pin 17 is inserted into the through hole 18 of the base 15, and is standing by at a position where the front end face is flush with the base upper face.

The upper mold 30 includes an upper mold body 31 for applying the main pressure F to the forging material W, a circular pin 40 for applying the negative pressures F1 and F2, (41).

Further, in the present embodiment, the back pressure pin is constituted by the circular pin 40, and the back pressure plate is constituted by the flat plate 41.

The upper mold body 31 is formed in a substantially cylindrical shape with an outer diameter corresponding to the through hole 20 of the bush 19 and the upper half body 33 of larger diameter is formed on the upper surface A concave portion 34 is formed. The concave portion 34 is formed with one circular hole 35 for fitting the circular fin 40 so as to be able to move forward and backward corresponding to the sectional shape of the circular fin 40, There are formed five flat holes 36 for inserting the flat plate 41 so as to be movable forward and backward. Both the circular hole 35 and the flat hole 36 penetrate the front end face of the punch portion 32 and the flat hole 36 also opens to the outer peripheral face of the punch portion 32. [ The positions of the circular hole 35 and the flat hole 35 correspond to the positions of the center pin 16 and the blade portion 13 in the lower mold body 11. [

Further, in the present embodiment, the center hole corresponding to the center pin is formed by the circular hole 36, and the hole corresponding to the blade portion is formed by the flat hole 35.

The circular pin 40 is a circular pin whose diameter is larger than that of the center pin 16 of the lower mold body 11 and a slip prevention portion 42 having a larger diameter than the circular hole 35 is integrally formed . The flat plate 41 has a thin plate shape having a circular portion at its tip end portion in the same manner as the blade portion 13 of the lower mold body 11 but is larger than the blade portion 13 and has a sectional area And an escape preventing portion 43 that enlarges the opening portion 43 is integrally mounted.

2A and 6, the circular pin 40 is inserted into the circular hole 35 from the concave portion 34 of the upper mold body 31, and each of the flat holes 36 The upper mold body 31, the circular fin 40 and the flat plate 41 are joined together so that the front end surface and the circumferential surface of the punch portion 32 are continuous with each other, One cylindrical body is formed.

Above the circular fins 40 and the flat plate 41, there is disposed a gas cushion 45 for applying a pressure applied thereto. When the piston rod 47 is inserted into the cylinder 46 in such a manner that the piston rod 47 can be moved forward and backward and a force in the retraction direction is applied to the piston rod 47 by the compressed gas sealed in the gas cushion 45, A force in a forward direction that balances the force is generated, and a force in a forward direction increases as the retraction distance increases. Each of the gas cushions 45 is fixed to the mounting plate 48 of the cylinder 46 and the distal end of the piston rod 47 is fixed to the circular pin 40 and the slip prevention portion 42 of the flat plate 41 The upper mold body 31 and the mounting plate 48 are brought into contact with the assembling attachment 43 in a state in which the upper mold body 31 and the mounting plate 48 are brought into contact with the circular pin 40 and the flat plate 41 with an initial pressure applied by the forward force of the piston rod 47, . When the circular pin 40 and the flat plate 41 are raised and the piston rod 47 is retracted, the pressure corresponding to the retraction distance is applied to the circular pin 40 and the flat plate 41. The negative pressure F1 and the negative pressure F1 applied to the circular pin 40 and the flat plate 41 are independent of the main pressure F And is controlled by the gas cushion 45.

The values of the first sub-pressure F1 and the second sub-pressure F2 can be adjusted by setting the operating pressure of the gas cushion 45, Since the cushion 45 is provided, the pressure can be independently controlled. That is, the main pressure F applied to the upper mold body 32, the first sub-pressures F1 applied to the circular fins 40, the five second sub-pressures applied to the five flat plates 41, (F2) can be set to independent pressures.

The lower mold 10 and the upper mold 30 are positioned such that the circular pin 40 and the flat plate 41 are located at corresponding positions of the center pin 16 and the blade portion 13 of the lower mold 10 Respectively. Therefore, as shown in Fig. 7, the first sub-pressure F1 is applied directly above the center pin 16 and the second sub-pressure F2 is applied just above the blade portion 13. [ The main pressure F is applied to the portion other than the center pin 16 and the blade portion 13. [ In the present invention, the first sub-pressure F1 and the second sub-pressure F2 are set to values smaller than the main pressure F. [

Next, a method of forging the forging material W for producing the rotor material 1 of Fig. 4 using the forging die will be described with reference to Figs. 2A to 2D, 7 and 8 .

A lubricant is applied to a required portion of the lower mold 20 and the upper mold 30 and the cylindrical forging material 49 is loaded into the loading hole 20 of the bush 19 as shown in Fig. The forging material W is manufactured by a method such as cutting the continuous cast material to a predetermined length as described above, and is heated to a predetermined temperature as required. Examples of the lubricant include an aqueous graphite lubricant and an oily graphite lubricant. In order to prevent scuffing between the forging material W and the molds 10 and 30, an aqueous graphite lubricant and an oily graphite lubricant It is preferable to use them in combination. The coating amount is about 2 to 10 g each. When the forging material W is an aluminum alloy, the preheating temperature is preferably 400 to 450 ° C.

When the upper mold 30 is lowered by the main pressure F and the forged material W loaded on the lower mold 10 is forged as shown in Fig. 2B from this state, The circular pin 40 to which the first negative pressure F1 smaller than the main pressure F is applied and the flat plate 41 to which the second negative pressure F2 is applied are pushed up And the material flows into the circular hole 35 and the flat hole 36. As the circular pin 40 and the flat plate 41 rise with the lowering of the upper mold 30 and the retraction distance of the piston rod 47 becomes larger, The second negative pressure F2 applied to the first flat plate 41 and the second flat plate 41 is increased. In this way, while the main pressure F is applied to the portion other than the circular pin 40 and the flat plate 41 with respect to the forging material W, the circular pin 40 and the flat plate 41 A first sub-pressure F1 and a second sub-pressure F2 independent from the main pressure F are given to the corresponding portions.

A first sub-pressure F1 and a second sub-pressure F2 are applied to the circular pin 40 and the flat plate 41 smaller than the main pressure F as shown in Fig. 40 and the flat plate 41 rise, and the material flows into the circular hole 35 and the flat hole 36. The force applied to the center pin 16 and the blade portion 13 of the lower mold 10 is relieved by flowing the material into the circular hole 35 and the flat hole 36. [ As a result, as shown in Fig. 7B, the metal flow? 1 between the wall surface of the forming hole 12 and the blade portion 13 and the metal flow? 1 deform the blade portion 13 inward The metal flux a3 directed toward the outer periphery at the time of forming the center hole 3 acts in the direction opposite to the force? 2 for deforming the blade portion 13 inward, the center pin 16 and the blade portion 13 can be restrained from flexural deformation and twisting deformation.

The appropriate values of the first sub-pressure F1 and the second sub-pressure F2 are appropriately set in accordance with the volume of the center pin 16 and the blade portion 13. The larger the volume of the center pin 16 is, the smaller the first partial pressure F1 is, and the larger the volume of the center hole 16 is, the smaller the volume of the circular hole 35 The balance can be maintained.

When the upper mold 30 is lowered to the bottom dead center as shown in FIG. 2C through the above-described process, the mold is formed into the shape of the rotor material 1.

In this embodiment, at the time when the upper mold 30 is lowered to the bottom dead center, the front end face (upper end face) of the center pin 16 is in contact with the opening face of the circular hole 35 Position) of the vehicle.

More specifically, when the distance between the distal end face of the center pin 16 and the opening face of the circular hole 35 is defined as the end face difference D3 on the center hole side, the end face difference D3 on the center hole side, Is set to 0 to 2 mm (see Fig. 12).

The tip end face (upper end face) of the blade portion 13 is made to coincide or spaced from the opening face (lower end position) of the flat hole 36 at the time of fitting.

Specifically, assuming that the distance between the tip end face of the blade portion 13 and the opening face of the flat hole 36 is the end face difference D4 on the vane groove side, the end face difference D4 on the vane groove side is represented by And is set to 0 to 2 mm as described above (see FIG. 13A).

In the present embodiment, when the clearance D5 on the center hole side is set to 0.01 (mm) when the clearance D5 on the center hole side is defined as the distance between the outer peripheral surface of the center pin 16 and the inner peripheral surface of the circular hole 35 To 0.1 mm, and more preferably, 0.05 to 0.1 mm (see Fig. 12).

The clearance D6 on the vane groove side is set to 0.01 to 0.1 mm similarly to the above case when the clearance D6 between the outer peripheral surface of the blade portion 13 and the inner peripheral surface of the flat hole 36 is the vane groove side clearance D6 , And more preferably 0.05 to 0.1 mm (see Fig. 13A).

Needless to say, in the case of adjusting the clearances D5 and D6, it is generally performed by changing the inner diameters of the circular holes 35 and the flat holes 36. [

After completion of the type of the upper mold 30, the upper mold 30 is raised and the knockout pin 17 is raised as shown in Fig. 2 (d) to project the forged rotor material 1. The piston rod 47 of the gas cushion 45 is returned to the initial position when the circular pin 40 and the flat plate 41 are separated from the rotor material 1 and the force from below is removed.

The rotor material 1 shown in Fig. 3 is prevented from being deformed due to the bending deformation and the twist deformation of the center pin 16 and the blade portion 13 of the lower mold 10 in the above- And the vane groove 4 are high in dimensional accuracy, and the mold life is prolonged by suppressing deformation. In addition, since it is not necessary to enlarge the outer diameter of the rotor material in order to prevent the deformation of the blade portion 13, there is no portion to be cut off in the post-processing, so that waste of material does not occur.

The first partial pressure F1 and the second partial pressure F2 are set to be smaller than the main pressure F so that the material pushed by the circular fin 40 and the blade portion 13 can easily flow The upper mold 30 can be lowered to the level at which the circular fins 40 and the blade portions 13 are inserted into the circular holes 35 and the flat holes 36. [ The rotor material 1 to be manufactured is moved to the upper end face (one end face 2a) of the rotor portion 2 by the movement of the thickness portion of the center hole 3 and the vane groove 4, 3 and the portions of the vane grooves 4, the excess thickness portions 5, 6 are formed.

The excess thickness portion 5 on the center hole 3 and the excess thickness portion 6 on the vane groove 4 are individually formed so as to be separated from each other And the planar shape of the excess thickness portions 5 and 6 corresponds to the sectional shape of the circular fin 40 and the flat plate 41. [

In the present embodiment, since the back pressure by the first and second negative pressures F1 and F2 is applied during the forging process, the excess thickness portions 5 and 6 are separated from the rotor portion 2 It is possible to reliably prevent the problem of inadvertent detachment or tearing and the excess thickness portions 5 and 6 of the structures described later can be integrally formed on the rotor material 1. [

In this embodiment, the rotor material 1 is constituted by the rotor portion 2 and the excess thickness portions 5 and 6. The rotor portion 2 is provided with the excess thick portions 5 and 6, .

As shown in Figs. 10 and 11, the excess thickness portions 5 and 6 thus formed are provided so as to bulge from one end face 2a of the rotor portion 2 to one end portion side.

As described above, since the front end faces of the center pin 16 and the blade portion 13 are aligned or spaced from the opening faces of the circular holes 35 and the flat holes 36 in the fitted state The center hole 3 and the one end faces 3a and 4a of the vane groove 4 in the rotor material 1 do not reach the inside of the excess thickness portions 5 and 6, The side faces 3a and 4a are disposed on the inner side of the one end face 2a of the rotor portion 2. [

Needless to say, both the center hole 3 and the vane groove 4 are opened at the other end surface (lower end surface 2b) of the rotor portion 2 of the rotor material 1. [

Since the end face difference D3 on the center hole side and the end face difference D4 on the vane groove side are set to 0 to 2 mm as described above, (Breaking lengths D3 and D4) between the one end face 2a of the center hole 3 and one end face 3a and 4a of the vane groove 4 are set to the same value.

Since the clearance D5 on the center hole side and the clearance D6 on the vane groove side are set to 0.01 to 0.1 mm and preferably 0.05 to 0.1 mm, The diameters D5 and D6 between the outer peripheral surface of the center hole 3 and the inner peripheral surface of the vane groove 4 are set to the same values.

8B, in the present embodiment, among the diameter difference D6 between the excess thickness portion 6 and the vane groove 4, the diameter difference D61 of the rotor outer peripheral side end portion and the inner diameter side The diameter difference D62 of the end portion is formed to be larger than the diameter difference D60 of the intermediate main portion.

In the present embodiment, the radius of curvature r3 between the inner peripheral surface of the center hole 3 and the one end surface 2a of the rotor blank 1 is set to 0.2 to 1 mm. It is also preferable that the radius of curvature r4 between the inner peripheral surface of the vane groove 4 and the one end surface 4a is also set to 0.2 to 1 mm. It is possible to prevent the excessive thickness portions 5 and 6 from being removed by punching as shown in Fig. 13B, for example, and the inner thickness of the center hole 3 and the vane groove 4, The average value of the height B1 of the center hole 3 of the bur and the inner wall surface of the vane groove 4 can be adjusted to a desired value. Specifically, the height B1 of the inner burr can be set to 1 mm or less. In addition, when the height B1 of the inner burr exceeds 1 mm, the fracture position becomes unstable, and it becomes difficult to manage the inner dimension of the center hole 3 and the vane groove 4 with accuracy.

In the present embodiment, the radius of curvature r3a (r4a) between the outer peripheral surface and the one end surface 2a of the excess thickness portion 5 (6) of the rotor material 1 is larger than the curvature radius r3a (R3) (r4) of the inner circumferential surface side of the inner circumferential surface of the inner circumferential surface (6). Concretely, it is preferable to satisfy the relation of "r3a? R3" and "r4a? R4". By setting this range, the average value of the convex bar height B2 remaining on the one end face 2a when the excess thickness portions 5 and 6 are removed, for example, by punching as shown in Fig. It can be adjusted to a desired value. Specifically, the height B2 of the convex burr can be set to 1 mm or less. The breaking position can be stabilized and the deviation of the height B2 of the convex bur can be reduced so that the cutting value management in the subsequent process is facilitated and the dimensional accuracy management of the center hole 3 and the vane groove 4 becomes easier It becomes easy. Further, when the height B2 of the convex burr exceeds 1 mm, the fracture position becomes unstable, and it becomes difficult to manage the accuracy of the inside dimension of the center hole 3 and the vane groove 4.

The mold used in the present invention is a mold for molding a rotor material having such a shape and has a curvature radius r3a in the circular hole 35 of the upper mold and an inverted shape of the radius of curvature r4a of the flat hole 36 And the inverted shape of the radius of curvature r3 of the center pin 16 of the lower mold has an inverted shape of the radius of curvature r4 in the blade 13.

In the forging process according to the present embodiment, the main pressure F, the first sub-pressures F1 and the second sub-pressures F2 are set in accordance with the shape of the rotor material 1, the dimensions of each part, the material composition, Set it appropriately. (F): 270 to 325 MPa, a first portion pressure (F1), and a second portion pressure (F1) are set as setting values when a rotor (R) having a diameter of 40 to 70 mm and a height of 30 to 60 mm is produced from aluminum or an aluminum alloy, And the second partial pressure (F2): 29 to 89 MPa.

If the first and second negative pressures F1 and F2 are set too small, the excess thickness portions 5 and 6 may be torn. On the contrary, if the first and second negative pressures F1 and F2 are set too large, The effect of relieving the force applied to the portion 13 is small, and the effect of suppressing deformation and twisting deformation is reduced. When the aluminum alloy rotor (R) is forged as described above, it is preferably 29 to 89 MPa, more preferably 39 to 49 MPa. In the spring-type negative pressure applying means such as the gas cushion 45, the first sub-pressures F1 and the second sub-pressures F2 are increased with the lowering of the upper mold 30. However, The pressure is the initial pressure.

The negative pressure applying means for applying the first sub-pressure F1 and the second sub-pressure F2 is not limited, but it is preferable that pressure can be applied following the lifting and lowering of the upper mold 30. From this point of view, a spring type such as a gas cushion is preferable, and a mechanical spring, a hydraulic mechanism, and a shock absorber can be exemplified as other negative pressure applying means.

<Punching Step>

14 is a cross-sectional view schematically showing a punching device (die set) as an excess thickness portion removing device used in a punching process (excess thickness portion removing process). 14, the punching device has a lower mold 8 and an upper mold 9, and as will be described later in detail, a punching process is carried out from the rotor material 1 to the excess thickness portion ( 5) 6 can be removed by punching.

The lower mold 8 includes a lower plate 81 and a lower mold body 85 provided on the upper surface of the lower plate 81. [

The lower plate 81 has a thick thickness portion discharge hole 82 penetrating the lower plate 81 in the vertical direction. Guide bars 83 are vertically installed on both side portions of the lower plate 81.

The lower mold body 85 is fixed on the upper surface of the lower plate 81 so as to close the excess thickness portion discharge hole 82. [

The lower mold body 85 is provided with a work mounting portion 86 corresponding to the excess thickness portion discharge hole 82 of the lower plate 81. The work mounting portion 86 is configured so that the rotor material 1 can be installed on the side of its one end face 2a downward. That is, the center hole side de-molding hole 87 is formed in the work mounting portion 86 so as to correspond to the center hole side surplus thickness portion 5, and the vane groove side de- (88) are formed. The center hole side deodorizing hole 87 is formed so as to correspond to the outer peripheral shape of the center thicker portion 5 on the center hole side and the center thicker portion 5 can be fit Respectively. The vane groove side deodorization hole 88 is formed so as to correspond to the outer circumferential shape of the vane groove side excess thickness portion 6 so that the vane groove side excess thickness portion 6 can be fit in a satisfactory state . And the lower end side is in communication with the excess thick portion ejection hole 82 of the lower plate 81. In addition,

The excess thick portions 5 and 6 of the rotor material 1 are fit in the demoulding holes 87 and 88 in a suitable state so that the one end face 2a of the rotor portion 2 is fixed to the work mounting portion 86 so that the rotor material 1 can be set on the work mounting portion 86 in a positioning state.

The upper mold 9 is provided with an upper plate 91 and an upper mold body 95 provided on the lower surface of the upper plate 91.

The upper plate 91 is configured to be vertically movable, and can be moved up and down by a lifting drive means such as a hydraulic cylinder (not shown).

Guide holes 93 are formed on both side portions of the upper plate 91 to correspond to the guide bars 83 of the lower plate 83. When the upper plate 91 descends as described later, The guide bar 83 is inserted into the guide hole 93 so that the downward movement of the upper plate 91 is guided.

The upper mold body 95 is fixed to the lower surface of the upper plate 91 so as to face the lower mold body 85.

The upper mold body 95 is provided with a rotor material (not shown) corresponding to the center hole side demoulding hole 87 and the vane groove side demoulding hole 88 in the lower mold body 85, The center hole side punching punch 97 and the vane groove side punching punch 98 are provided so as to protrude downward in correspondence with the center hole 3 and the vane groove 4 of the center hole side 1 and the vane groove side 4, respectively.

In the present embodiment, the punching punches 97 and 98 are configured as impact members.

Next, a method of removing the excess thickness portions 5 and 6 of the rotor blank 1 using the punching apparatus having the above-described configuration will be described.

The excess thickness portions 5 and 6 are formed in the workpiece mounting portion 86 of the lower mold 8 of the punching apparatus so that the rotor material 1 is directed downward on the one end face 2a side, (87) and (88). The punching punch 97 on the center hole side of the upper mold body 85 and the punching punch 98 on the side of the vane groove are engaged with the center hole 3 of the rotor material 1 and the other end of the vane groove 4 Side opening portion.

When the upper mold 85 is lowered while the rotor material 1 is set in this way, the punches 97 and 98 of the upper mold body 85 are moved to the upper end face (the other end face 2b are inserted into the center hole 3 and the vane groove 4 so that the punches 97 and 98 hit the excess thickness portions 5 and 6 in a pressurized state, (6) is punched. The excess thickness portions 5 and 6 are removed from the rotor portion 2 and the excess thick portions 5 and 6 are removed through the excess thick portion discharge holes 82 of the lower plate 81 And is discharged downward. 14, the center hole 3 and the one end side of the vane groove 4 in the rotor blank 1 are opened so that the center hole 3 and both ends of the vane groove 4 The rotor R can be obtained.

In this embodiment, since the excess thickness portions 5 and 6 and the diameter difference D5 and D6 between the center hole 3 and the vane groove 4 are set small, the excess thick portion 5 ) 6 can be reliably removed at a predetermined position with high accuracy.

Particularly, in the present embodiment, since the fracture lengths D3 and D4 of the excess thickness portions 5 and 6 are thin, the fracture region at the time of removing the excess thickness portions can be reduced, So that the production efficiency can be improved.

Since the excess thickness portions 5 and 6 can be punched by the punches 97 and 98 at the bottom pressure, it is possible to effectively prevent cracks and fractures, which are harmful to the rotor R, It is possible to manufacture a high-quality rotor product.

Moreover, since the punches 97 and 98 can be machined at a low pressure, the wear of the punches 97 and 98 themselves can be reduced, and the durability of the punches 97 and 98, and furthermore, the durability of the punching device can be further improved.

In addition, since the breaking region at the time of removing the excess thick portion is small, the breaking mark (breaking face) is also reduced, and the bad influence due to the breaking mark can be avoided. For example, the finishing process for finishing the breaking mark Therefore, the productivity can be further improved by reducing the number of process steps, and the cost can be reduced.

In the present embodiment, since the one end surface 3a of the center hole 3 and the one end surface 4a of the vane groove 4 are disposed on the inner side than the one end surface 2a of the rotor portion 2, Since the breakage marks after the removal of the portions are disposed in the inner periphery of the center hole 3 and the inner periphery of the vane groove 4, that is, in the rotor R, It is unnecessary to perform the post-processing of the local station, thereby further improving the productivity.

The diameter difference D61 on the outer peripheral end side of the rotor portion and the diameter difference D62 on the inner peripheral end side among the diameter difference D6 between the excess thickness portion 6 and the vane groove 4, It is possible to prevent the excessive thickness portion 6 from being inadvertently dropped off prior to the punching process after the forging and to prevent the excess thickness portion 6 from being forged It is possible to reliably prevent problems such as remaining in the working mold and to maintain high productivity.

In addition, in the present embodiment, since the diameter difference D61 (D62) at both ends of the excess thickness portion 6 is formed thick, inadvertent breakage at this portion can be surely prevented, It is possible to reliably prevent the portion 6 from being inadvertently dropped off. In other words, both end portions of the excess thickness portion 6 tend to be broken at the time of dropout, and both ends of the thick portion 6 are thickly formed, so that breakage is unlikely to occur, and inadvertent dropout can be more reliably prevented.

In the present embodiment, the diameter difference (clearance D6) in the outer periphery of the excess thickness portion 6 on the side of the vane groove 4 is partially increased, but the present invention is not limited thereto. In the present invention, The diameter difference D5 on the outer periphery of the excess thickness portion 5 on the center hole 3 side may be partially increased.

In this embodiment, in the case where the diameter difference D5, D6 and the breaking length D3, D4 of the outer periphery of the surplus thickness portion are excessively large, the surplus thickness portions 5, 6 It can not be removed with a high precision, and there is a possibility that an adverse effect due to a breakage mark may occur. On the other hand, when the diameter differences D5 and D6 are too small, the excess thickness portions 5 and 6 may be inadvertently dropped off before the punching process.

The center hole 3 and one end faces 3a and 4a of the vane groove 4 are located on the outer side of the one end face 2a of the rotor portion 2, Even if the excess thick portions 5 and 6 are removed by the punching process in the case where the excess thickness portions 5 and 6 are disposed inside the excess thickness portions 5 and 6, And the remaining portion (breakage-causing station) is disposed so as to protrude to the outside of the rotor R. Because of this, it is necessary to remove the protruding breakage mark in the subsequent process, which increases the number of processes, which may result in lower productivity.

In the punching process of the present embodiment, the rotor material 1 does not need to be particularly heated and is cold. However, in the present invention, the rotor material (1) may be heated immediately before the punching process, and the punching process may be performed in a hot state.

<Modifications>

The excess thick portions 5 and 6 are punched by the punches 97 and 98 inserted from the center hole 3 and the other end side of the vane groove 4 in the above embodiment, In the invention, when removing excess thickness portions, it is not limited to punching by punching.

That is, a shock member such as a hammer is struck from the outside of the rotor material 1, for example, in a direction perpendicular to the axial direction, and the impulse portion is hit or dropped by the impact, (Proximal end portions) of the excess thickness portions 5 (6) may be cut along the plane perpendicular to the axial direction by the member so that the excess thickness portions 5 (6) are cut off.

Example

[Example 1]

The rotor material 1 shown in Fig. 3 was forged by using the forging molds 10 and 30 shown in Figs. 1 and 2. The rotor material (1) is a material for manufacturing the rotor (R) made of an aluminum alloy shown in Fig.

The diameter of the center hole 3 is 10 mm, the number of the vane grooves 4 is 5, the groove width is 3 mm, the groove depth is 15 mm, the offset dimension ((mm) U): 10 mm. The material alloy used A390.

As shown in Table 1 below, the clearance D5 between the center pin 16 of the lower mold 10 and the circular hole 35 of the upper mold 30 in the forging mold was set to 0.1 mm And the clearance D6 between the blade portion 13 of the lower mold 10 and the flat hole 36 of the upper mold 30 was 0.1 mm as described above.

The distance (the breaking length D3) between the center pin 16 of the lower mold 10 and the opening surface of the circular hole 35 in the upper mold 30 is 1.5 mm, (Breaking length D4) between the portion 13 and the opening surface of the flat hole 36 in the upper mold 30 is set to 1.5 mm as described above.

Then, the forged material W heated to 400 DEG C was loaded on the lower mold 10, and the following molding pressure was applied to form the rotor material 1. During this forging, the first partial pressure F1 and the second partial pressure F2 were increased, and the final pressure was 1.5 times the initial pressure.

Main pressure (F) = 325 MPa

Initial pressure of the first portion pressure (F1): 32.9 MPa (4.0 kg / mm 2)

Initial pressure of the second portion pressure F2: 44.1 MPa (4.5 kg / mm 2)

The rotor material 1 thus obtained was used as a rotor R by removing the excess thickness portions 5 and 6 by using the punching device shown in Fig.

The material yield of the rotor R with respect to the forging material W (weight of the rotor R / weight of the forging material W × 100) was 82.9%.

Figure 112010085161523-pct00001

[Example 2]

A rotor (R) was produced in the same manner as in Example 1 except that the fracture lengths (D3) and (D4) of the excess thickness portions (5) and (6) were set to "0" as shown in Table 1.

[Comparative Example 1]

A rotor (R) was produced in the same manner as in the above example, except that the rupture length (D3) (D4) of the excess thickness portions (5) and (6) was set to -2 mm as shown in Table 1.

[Comparative Example 2]

As shown in Table 1, the fracture lengths D3 and D4 of the excess thickness portions 5 and 6 were set to -2 mm and the clearances D5 and D6 of the surplus thickness portion were set to 2 mm , A rotor (R) was fabricated in the same manner as in the above embodiment.

〔evaluation〕

As shown in Table 1, in the production methods of Examples 1 and 2, the excess thickness portions 5 and 6 were not inadvertently broken or fell off during forging, and they could be processed without stagnation.

In addition, in the production methods of Examples 1 and 2, the fracture surface after punching (after removing the excess thickness portion) is small and the fracture surface (fracture surface) is formed inside the center hole 3 and the inside of the vane groove 4 Respectively. Therefore, it is considered that there is no problem even if the breaking mark is not finished.

On the other hand, in the production method of Comparative Example 1, the excess thickness portions 5 and 6 were inadvertently broken at the time of forging, so that it was impossible to smoothly process them.

In addition, in the production method of Comparative Example 2, the fracture surface after punching was large and the fracture surface (fracture surface) was projected to the outside. Therefore, when actually used, it is considered to be necessary to remove this breaking mark by finishing.

[Test Examples 1 to 7]

Except that the radius of curvature r3 (r3a) on the side of the center hole 3 was adjusted to be the value shown in Table 2, the rotor was produced under the same conditions as those in Example 1 above. And the inner side burr and the convex bur (see Fig. 13B) were evaluated. The results are shown together in Table 2.

Figure 112010085161523-pct00002

As is evident from the above table, when the curvature radius r3 (r3a) was adjusted to a specific value, the states of the inner burr and the convex burr were stable.

The same test as described above was performed on the curvature radius r4 (r4a) on the side of the vane groove 4, and the same evaluation was obtained.

The present application is based on Japanese patent application No. 2008-164327 filed on June 24, 2008 and Japanese Patent Application No. 2009-44372 filed on February 26, 2009 The disclosure of which is incorporated herein by reference in its entirety.

It is to be understood that the terminology and phraseology used herein is for the purpose of description and is not to be taken as limiting, and does not exclude any equivalents of the features described and illustrated herein, It should be appreciated that various modifications are possible.

While the present invention may be embodied in many different forms, it is to be understood that this disclosure is to be considered as providing an embodiment of the principles of the invention, and that they are intended to be illustrative of the invention and / On the basis of the understanding that the invention is not intended to be limited to the preferred embodiments, many of the embodiments are described herein.

Although a few embodiments of the present invention have been described herein, it is to be understood that the present invention is not limited to the various preferred embodiments described herein, but on the basis of this disclosure, Modifications, and combinations (for example, combinations of features relating to various embodiments), improvements, and / or modifications. The limitations of the claims shall be construed broadly based on the terms used in the claims, and are not to be confined to the examples set forth in this specification or the pro section of the present application, and such embodiments shall be construed as non-exclusive.

The method for rotor material of the present invention can be applied when manufacturing a rotor such as a compressor.

1: Rotor material
3: Center hole (shaft hole)
4: Vane groove
10: Lower mold
12: forming hole
13:
16: center pin
30: upper mold
35: Circular hole (hole corresponding to center pin)
36: Flat hole (blade corresponding hole)
40: Circular pin (back pressure pin)
41: Flat plate (back pressure plate)
D3: End face difference at the center hole side
D4: End face difference on the vane groove side
D5: Clearance on the center hole side
D6: Clearance at the vane groove side
R: Rotor
W: Forged material

Claims (17)

A mold forging a cylindrical rotor material having a center hole and a vane groove parallel to an axial line on an outer peripheral portion, the mold being provided with a lower mold and an upper mold for applying molding pressure,
Wherein the lower mold has a blade portion for forming a vane groove protruding into the forming hole and a center pin for forming a center hole disposed at the center of the forming hole,
The upper mold includes an upper mold main body for applying a main pressure to portions other than the center pin and the blade portion of the lower mold and a center pin corresponding hole formed in the upper mold main body A back pressure pin for applying a first partial pressure to the center pin and a rear portion corresponding to the blade portion so as to be retractably fitted in a hole corresponding to the blade portion formed in the upper mold body, Having a back pressure plate,
The leading end surface of the blade portion at the time of fitting is aligned with or spaced from the opening surface of the blade portion corresponding hole,
Wherein the main pressure, the first pressure, and the second pressure are set to independent pressures. The blade according to claim 1, wherein, when the distance between the tip end surface of the blade portion and the opening surface of the blade portion corresponding hole at the time of fitting is an end surface difference at the vane groove side, the difference in end surface at the vane groove side is 0 to 2 mm Mold for rotor material forging to be set. The rotor according to claim 1 or 2, wherein a clearance between the outer peripheral surface of the blade portion and the inner peripheral surface of the blade portion corresponding hole is a clearance on the vane groove side, Quiet mold. The mold for forging a rotor material according to claim 3, wherein the clearance on the vane groove side is partially different. 4. The mold for forging a rotor material forging according to claim 3, wherein a clearance between at least one of the inner circumferential end and the outer circumferential end of the clearance on the vane groove side is set larger than the clearance of the intermediate portion. 3. The mold for forging a rotor material forging according to claim 1 or 2, wherein the tip end face of the center pin is aligned or spaced from the opening face of the center pin corresponding hole. The center pin hole according to claim 6, wherein, when the distance between the front end face of the center pin and the opening face of the center pin corresponding hole at the time of fitting is defined as the difference in end face at the center hole side, To 2 mm. The rotor according to claim 6, wherein a clearance on the center hole side is set to 0.01 to 0.1 mm when the clearance between the outer peripheral surface of the center pin and the inner peripheral surface of the center pin- mold. The mold for forging a rotor material according to claim 8, wherein a clearance on the center hole side is partially different. 3. The apparatus according to claim 1 or 2, further comprising: negative pressure applying means provided on an upper portion of the back pressure pin for applying a first negative pressure, and negative pressure applying means provided on an upper portion of the back pressure plate for applying a second negative pressure And a providing means. The mold for forging a rotor material according to claim 10, wherein the negative pressure applying means is a gas cushion. A method for forging a cylindrical rotor material having a center hole and a vane groove parallel to an axis on an outer peripheral portion thereof,
A lower mold having a blade portion for forming a vane groove protruding into a forming hole and a center pin for center hole forming disposed at the center of the forming hole is prepared,
An upper mold main body for applying a main pressure to a portion other than the center pin and the blade portion of the lower mold and a center pin corresponding hole formed in the upper mold main body, And an upper mold having a back pressure plate that is retractably fitted in a hole corresponding to the blade portion formed in the upper mold body so as to apply a second partial pressure to the upper mold body,
The leading end surface of the blade portion is made to coincide or spaced with respect to the opening surface of the blade portion corresponding hole,
Wherein the main pressure, the first pressure, and the second pressure are set to independent pressures. 13. The method of forging a rotor material according to claim 12, wherein the leading end surface of the center pin is aligned or spaced from the opening surface of the center pin-corresponding hole. 14. The method of forging a rotor material as claimed in claim 12 or 13, wherein the first and second negative pressures are respectively 29 to 89 MPa. delete The method of forging a rotor material according to claim 12 or 13, wherein the first section pressure is reduced as the cross-sectional area of the center pin increases. The forging method according to claim 12 or 13, wherein the rotor material is aluminum or aluminum alloy.
KR1020107028951A 2008-06-24 2009-06-24 Die for forging rotor material and method for forging rotor material KR101627878B1 (en)

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JPJP-P-2008-164327 2008-06-24
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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY154651A (en) * 2008-06-24 2015-07-15 Showa Denko Kk Method for producing rotor
KR101224401B1 (en) * 2011-12-01 2013-01-21 한국기계연구원 A method for forming for the hot forging of aluminium or magnesium alloy scroll rotor using form change of a mold
CN102728760B (en) * 2012-07-03 2014-08-13 北京有色金属研究总院 Aluminum alloy rotor forming die and method thereof
KR20150145821A (en) 2014-06-19 2015-12-31 희성정밀 주식회사 Die for forging rotor material and method for forging rotor material
KR101678459B1 (en) 2015-02-17 2016-11-23 희성정밀 주식회사 Forging Device For Compressor Rotor And Forging Method Thereof
DE102015206684B4 (en) * 2015-04-14 2024-03-14 Hanon Systems Efp Deutschland Gmbh Pump device
KR101692937B1 (en) * 2015-05-22 2017-01-04 주식회사 성원정밀 Mold for motor rotor die casting
CN106001341A (en) * 2016-06-17 2016-10-12 宾科汽车紧固件（昆山）有限公司 Cold forging process for rotor and reverse hole extrusion die
KR20160084828A (en) 2016-07-01 2016-07-14 희성정밀 주식회사 Die for forging rotor material and method for forging rotor material
CN106180535B (en) * 2016-07-08 2018-07-06 杭州汽轮铸锻有限公司 A kind of free forging method for improving rotor forging quality
KR20160101883A (en) 2016-08-01 2016-08-26 희성정밀 주식회사 Forging Device For Compressor Rotor And Forging Method Thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152987A (en) * 1984-12-26 1986-07-11 Nippon Piston Ring Co Ltd Manufacture of rotor for rotary fluid pump
DE19882375B4 (en) * 1997-04-22 2006-04-13 Komatsu Industries Corp. Forging-lowering device and compression forging method
JP3758103B2 (en) * 1997-04-22 2006-03-22 コマツ産機株式会社 Upset forging method
JP4003147B2 (en) * 1998-02-16 2007-11-07 株式会社ヴァレオサーマルシステムズ Manufacturing method of rotor
KR100257220B1 (en) * 1998-03-18 2000-05-15 지현철 Die-casting machine
JP4187336B2 (en) * 1999-02-03 2008-11-26 株式会社 ニッセイ ROTOR MANUFACTURING METHOD AND ITS MANUFACTURING DEVICE
KR100461282B1 (en) * 2001-10-16 2004-12-14 한국기계연구원 A Heat Back Pressing Machine for Heat Forging of Al alloyed Scroll Rotor and Method Thereof
JP4143631B2 (en) * 2005-09-01 2008-09-03 トヨタ自動車株式会社 Manufacturing method of rotor

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KR20110027709A (en) 2011-03-16
PT2306025T (en) 2018-11-15
CN102076964A (en) 2011-05-25
JP5468541B2 (en) 2014-04-09
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WO2009157469A1 (en) 2009-12-30
EP2306025A4 (en) 2012-11-21

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