CN102076965B

CN102076965B - Method for producing rotor

Info

Publication number: CN102076965B
Application number: CN200980124310.1A
Authority: CN
Inventors: 山田英实; 远藤大辅
Original assignee: Showa Denko KK
Current assignee: Resonac Holdings Corp
Priority date: 2008-06-24
Filing date: 2009-06-24
Publication date: 2014-11-26
Anticipated expiration: 2029-06-24
Also published as: JP5468542B2; EP2312165A1; WO2009157470A1; CN102076965A; JPWO2009157470A1; MY154651A; KR20110020275A; EP2312165A4

Abstract

The invention is used for producing a rotor efficiently, and targets on a method for producing the rotor. A method for producing a rotor comprises a step of forging for obtaining a rotor material (1) having a cylindrical rotor portion (2) provided, in the outer circumference thereof, with a plurality of vane grooves (4) along the axial direction at intervals in the circumferential direction, and a pad portion (6) formed integrally with one end surface of the rotor portion (2) to swell toward the one end side and closing the one end side of the vane grooves (4), and a step of pad portion removing for obtaining a rotor (R) wherein the vane grooves (4) are opened to the one end side by striking an impact member against the pad portion (6) thereby removing the pad portion (6) from the rotor portion (2).

Description

The manufacture method of rotor

Technical field

The present invention relates to for the manufacture of manufacture method and the correlation technique thereof of rotor of rotor at peripheral part with blade (ベ mono-Application, impeller) groove.

Background technique

The rotor of the rotary vacuum pump that the rotor of compressor or break control are used, is normally circumferentially formed with multiple blade grooves parallel with respect to axis every equal intervals on peripheral part edge.In addition, be equipped on the rotor of idle call rotary compressor or the rotor of the rotary vacuum pump that break control is used of automobile, conventionally turn to object with lightweight and make aluminum alloy be made for main flow, and manufacture with forging processing.

The method for manufacturing rotor that for example following patent documentation 1 represents, in the shaped hole of lower mould (counterdie), to be formed with to form the blade part that blade groove is used, and utilize upper die (patrix) that the columniform forging blank being placed on this shaped hole is pressurizeed downwards, thereby forging blank is filled in shaped hole.Thus, obtain blade groove to be formed into from lower end surface near columned rotor blank upper-end surface.And excise the upper end portion of this rotor blank (clout portion by carrying out cutting along the face orthogonal with respect to axis, remaining meat portion) thus one distolateral (upper end side) of blade groove is open, by the both ends open of blade groove, be configured to rotor thus.

The method for manufacturing rotor that following patent documentation 2 represents in addition, in the forming face of upper die, to be provided with to form the trough of belt drift that blade groove is used, and the trough of belt drift of upper die is squeezed into the forging blank in the shaped hole that is placed on lower mould, form blade groove near thus from upper-end surface to lower end surface.Then continue to squeeze into trough of belt drift, and remove by the die-cut clout portion by inaccessible blade groove lower end side, thus by the both ends open of blade groove.

Patent documentation 1: Japanese kokai publication hei 11-230068 communique

Patent documentation 2: TOHKEMY 2000-220588 communique

The method for manufacturing rotor in the past representing in above-mentioned patent documentation 1 be will to forge the clout portion excision of processing the rotor blank obtaining by cutting, but compared with forging the punch process such as processing, the manufacturing efficiency of the machinings such as cutting is lower.Therefore as long as by the low machining of this manufacturing efficiency, it is very difficult improving overall manufacturing efficiency.

The method for manufacturing rotor in the past representing in above-mentioned patent documentation 2 in addition, to utilize trough of belt drift by die-cut the clout portion of the underpart of inaccessible blade groove and remove, conventionally, Punching Technology exists and is difficult to correctly controlled fracturing blasting position, and it is very high to produce less desirable crack or damaged possibility, thereby cannot correctly remove the problem of clout portion.

Summary of the invention

The preferred embodiment of the present invention is to make in view of the above-mentioned and/or other problems point of correlation technique.The preferred embodiment of the present invention can be improved existing method and/or device manufacturing efficiency significantly.

The present invention makes in view of above-mentioned problem, and object is to provide a kind of manufacture method and the correlation technique thereof that can guarantee higher manufacturing efficiency and remove exactly the rotor of clout portion.

Other objects of the present invention and advantage, can be clear and definite by following preferred implementation.

To achieve these goals, the present invention includes following formation.

(1) manufacture method for rotor, is characterized in that, comprises following operation:

Forging process, this forging process obtains rotor blank, and the rotor blank obtaining has: columned rotor part, this columned rotor part is arranged at intervals with multiple blade grooves along axial direction at peripheral part along circumferentially spaced; Clout portion, this clout portion is integrally formed in an end face of this rotor part in the mode side-prominent to one end, and by a distolateral obturation of described blade groove; With

Clout portion removing step, this clout portion removing step is removed this clout portion by making impact part clash into described clout portion from described rotor part, obtain thus the described blade groove rotor that at one end side is opened.

(2), as the manufacture method of above-mentioned 1 rotor of recording, in described rotor blank, described clout portion is formed on more distolateral by one than an end face of described rotor part, and described blade groove is formed into the inside of this clout portion.

(3) as the manufacture method of above-mentioned 2 rotors of recording, described clout portion has the surrounding wall portion of all sides obturation of described blade groove, makes described clout portion in its surrounding wall portion fracture and remove in described clout portion removing step.

(4), as the manufacture method of above-mentioned 2 or 3 rotors of recording, in described clout portion, in the time that the size from top to an end face of described blade groove is made as to the thickness of occlusive part, the thickness of this occlusive part is set to 3～10mm.

(5) as the manufacture method of the rotor of any one record in above-mentioned item 1 to 4, in described forging process, between described clout portion and described rotor part, form crackle in advance,

In described clout portion removing step, make described rotor blank along described crack fracture.

(6) as the manufacture method of the rotor of any one record in above-mentioned item 1 to 5, in described clout portion removing step, drift as impact part is squeezed in described blade groove from the other end side opening portion of the described blade groove of described rotor blank, and utilized this drift to remove described clout portion to one end Side Cutting.

(7) as the manufacture method of the rotor of any one record in above-mentioned item 1 to 6, in described forging process, relatively squeeze into blade groove shape die for forming from the other end of columned forging blank, and from other end to an end face form described blade groove

In the time that described blade groove shape die for forming is squeezed into described forging blank, the region corresponding with the predetermined forming portion of blade groove in an end face of described forging blank applied to back pressure.

(8) manufacture method of the rotor of recording as any one in above-mentioned 1 to 7, is made as blade groove side clout portion by described clout portion, and described impact part is made as to blade groove side impact parts,

In described forging processing, the described rotor part setting in described rotor blank is along the axis hole of axial direction, and one of the described axis hole of obturation distolateral axis hole side clout portion is integrally formed in to an end face of described rotor part in the mode side-prominent to one end,

In described clout portion removing step, make axis hole side clout portion described in axis hole side impact components hit, this clout portion is removed from described rotor part, at one end side is open to make thus described axis hole.

(9) as the manufacture method of above-mentioned 8 rotor of recording, drift as impact part is squeezed into described axis hole from the other end side opening portion of the described axis hole of described rotor blank, and described axis hole side clout portion is removed to one end Side Cutting with this drift.

(10) as the manufacture method of above-mentioned 8 or 9 rotors of recording, in described forging process, axis hole shape die for forming is relatively squeezed into from the other end of columned forging blank, from other end to an end face form described axis hole, on the other hand,

In the time that described axis hole shape die for forming is squeezed into described forging blank, the region corresponding with the predetermined forming portion of axis hole in an end face of described forging blank applied to back pressure.

(11) as the manufacture method of above-mentioned 1 rotor of recording, in described rotor blank, described clout portion is to be integrally formed in the end face in described rotor part to the side-prominent mode in one end, on the other hand, an end face of described blade groove is configured in than an end face of described rotor part and does not arrive more in the inner part and described clout portion.

(12) as the manufacture method of above-mentioned 11 rotor of recording, in the time that the end face that the interval of an end face of an end face of the described rotor part in described rotor blank and described blade groove is made as to blade groove side is poor, the poor 0～2mm that is set to of end face of this blade groove side.

(13) as the manufacture method of above-mentioned 11 or 12 rotor of recording, in the time that the interval of the outer circumferential face of the inner peripheral surface of the described blade groove in described rotor blank and described clout portion is made as to the semidiameter of blade groove side, the semidiameter of this blade groove side is set to 0.01～0.1mm.

(14) as the manufacture method of the rotor of any one record in above-mentioned item 11 to 13, the semidiameter of described blade groove side is different partly.

(15) as the manufacture method of above-mentioned 13 or 14 rotor of recording, in the semidiameter of described blade groove side, the semidiameter of at least any one party of end, inner circumferential side and outer circumferential side end, sets greatlyr with respect to the semidiameter of intermediate portion.

(16) manufacture method of the rotor of recording as any one in above-mentioned 11 to 15, is made as blade groove side clout portion by described clout portion, and described impact part is made as to blade groove side impact parts,

In described clout portion removing step, make axis hole side clout portion described in axis hole side impact components hit, this clout portion is removed from described rotor part, thus described axis hole at one end side opened,

Process in the rotor blank obtaining in described forging, an end face of described axis hole is configured in than an end face of described rotor part and does not arrive more in the inner part and described axis hole side clout portion.

(17) as the manufacture method of above-mentioned 16 rotor of recording, in the time that the end face that the interval of an end face of an end face of the described rotor part in described rotor blank and described axis hole is made as to axis hole side is poor, the poor 0～2mm that is set to of end face of this axis hole side.

(18) as the manufacture method of above-mentioned 16 or 17 rotor of recording, when the interval of the outer circumferential face of the inner peripheral surface of the described axis hole in described rotor blank and described axis hole side clout portion is made as the semidiameter of axis hole side, the semidiameter of this axis hole side is set to 0.01～0.1mm.

(19) as the manufacture method of the rotor of any one record in above-mentioned item 16 to 18, the semidiameter of described axis hole side is different partly.

(20) a kind of clout portion removal method of rotor blank, it is the method for the clout portion for removing rotor blank, described rotor blank has: columned rotor part, and this columned rotor part is arranged at intervals with multiple blade grooves along axial direction at peripheral part along circumferentially spaced; Described clout portion, this clout portion is integrally formed in an end face of this rotor part in the mode side-prominent to one end, and by a distolateral obturation of described blade groove, and the clout portion removal method of this rotor blank is characterised in that,

By making impact part clash into described clout portion, this clout portion is removed from described rotor part, at one end side is open to make thus described blade groove.

(21) a kind of clout portion removal device of rotor blank, it is the device of the clout portion for removing rotor blank, described rotor blank has: columned rotor part, and this columned rotor part is arranged at intervals with multiple blade grooves along axial direction at peripheral part along circumferentially spaced; Described clout portion, this clout portion is integrally formed in an end face of this rotor part in the mode side-prominent to one end, and by a distolateral obturation of described blade groove, and the clout portion removal device of this rotor blank is characterised in that,

Comprise drift, this drift is squeezed into described blade groove from the other end side opening portion of the described blade groove of described rotor blank, and remove to clout portion described in the Side Cutting of one end, thereby by clashing into described clout portion, described clout portion is removed from described rotor part, make thus the at one end side opening of described blade groove.

In addition in the present invention, also the structure replacing corresponding with the blade groove of above-mentioned (2)～(7) can be become to the structure corresponding with axis hole, be defined as the structure of above-mentioned (8), (20), (21).

In addition in the present invention, can also be the structure of above-mentioned (20), (21) by the structure qualification of above-mentioned (11)～(19).

According to the manufacture method of the rotor of invention (1), owing to utilizing the shock of impact part to remove clout portion, therefore can guarantee higher manufacturing efficiency.In addition because clout portion is outstanding, therefore can remove exactly by the shock of impact part.

According to the manufacture method of the rotor of invention (2)～(6), can obtain more effectively above-mentioned effect.

According to the manufacture method of the rotor of invention (7), can form effectively the clout portion of said structure.

According to the manufacture method of the rotor of invention (9), the clout portion that can remove more effectively axle side.

According to the manufacture method of the rotor of invention (10), with above-mentioned same, can guarantee higher manufacturing efficiency and remove exactly clout portion.

According to the manufacture method of the rotor of invention (11), owing to can reducing the semidiameter of blade groove inner peripheral surface and clout portion outer circumferential face, therefore can simply and exactly remove the clout portion of blade groove side, thereby can enhance productivity.

According to the manufacture method of the rotor of invention (12), (13), can obtain effectively above-mentioned effect.

According to the manufacture method of the rotor of invention (14), (15), can prevent that clout portion from inadvertently coming off.

According to the manufacture method of the rotor of invention (16), owing to can reducing the semidiameter of axis hole inner peripheral surface and clout portion outer circumferential face, therefore can simply and exactly remove the clout portion of axis hole side, can further enhance productivity.

According to the manufacture method of the rotor of invention (17), (18), the clout portion that can remove more effectively axle side.

According to the manufacture method of the rotor of invention (19), can prevent that the clout portion of axle side from inadvertently coming off.

According to the clout portion removal method of the rotor blank of invention (20), the clout portion that can effectively and exactly remove axis hole side.

According to the clout portion removal device of the rotor blank of invention (21), with above-mentioned same, can guarantee higher manufacturing efficiency and remove exactly clout portion.

Brief description of the drawings

Fig. 1 is the stereogram that forging mould that the forging machining in the manufacture method of the rotor of the first mode of execution of the present invention is used carries out exploded representation;

Fig. 2 A is the schematic sectional view of the forging preparatory stage in the forging processing of carrying out at the forging mould of the first mode of execution;

Fig. 2 B is the schematic sectional view of the upper die decline stage in the forging processing of carrying out at the forging mould of the first mode of execution;

Fig. 2 C is the schematic sectional view in the stage that machines in the forging processing of carrying out at the forging mould of the first mode of execution;

Fig. 2 D is that the processed goods in the forging processing of carrying out at the forging mould of the first mode of execution takes out the schematic sectional view in stage;

Fig. 3 is the stereogram that represents to process by the forging of the first mode of execution the rotor blank obtaining;

Fig. 4 is the stereogram that represents the rotor of the method for making manufacturing that adopts the first mode of execution;

Fig. 5 is the plan view of the Offset of the blade groove in the rotor blank of presentation graphs 4;

Fig. 6 represents the stereogram of the upper die in mould for the forging of the first mode of execution with assembling condition;

Fig. 7 A is the partly cut-away's stereogram representing to forging with the state of the lower mould load application in mould;

Fig. 7 B is the figure forging by the metal flow in the forging process of mould for illustrating;

Fig. 8 is the plan view of the rotor blank of the first mode of execution;

Fig. 9 is the flow chart that represents the process sequence in the manufacture method of the first mode of execution;

Figure 10 is the sectional view of the rotor blank of the first mode of execution being cut open to expression in center hole portion;

Figure 11 is the sectional view of the rotor blank of the first mode of execution being cut open to expression at blade slot part;

Figure 12 is the sectional view of the part of surrounding with double dot dash line of Watch with magnifier diagram 10;

Figure 13 is the sectional view of the part of surrounding with double dot dash line of Watch with magnifier diagram 11;

Figure 14 is the sectional view of punching (the Port Application チ Application グ) device that roughly represents that the clout portion removing step in the manufacture method of the first mode of execution uses;

Figure 15 is the sectional view that amplifies the center hole portion periphery in the rotor blank that represents the first mode of execution under the state of having removed clout portion;

Figure 16 is the sectional view that amplifies the blade slot part periphery in the rotor blank that represents the first mode of execution under the state of having removed clout portion;

Figure 17 will cut the sectional view of expression open in center hole portion as the rotor blank of the first variation of the present invention;

Figure 18 will cut the sectional view of expression open at blade slot part as the rotor blank of the first variation of the present invention;

Figure 19 will cut the sectional view of expression open in center hole portion as the rotor blank of the second variation of the present invention;

Figure 20 will cut the sectional view of expression open at blade slot part as the rotor blank of the second variation of the present invention;

Figure 21 is the stereogram that represents to process by the forging of the second mode of execution the rotor blank obtaining;

Figure 22 A is the plan view that represents the rotor blank in the second mode of execution;

Figure 22 B is the plan view that amplifies the blade groove part that represents the rotor blank in the second mode of execution;

Figure 23 is the sectional view of the rotor blank of the second mode of execution being cut open to expression in center hole portion;

Figure 24 is the sectional view of the rotor blank of mode of execution being cut open to expression at blade slot part;

Figure 25 is the sectional view of the centre hole side clout portion periphery of Watch with magnifier diagram 23;

Figure 26 is the sectional view of the blade groove side clout portion periphery of Watch with magnifier diagram 24;

Figure 27 A is the schematic sectional view of the upper die decline stage in the forging processing that utilizes the forging mould of the second mode of execution to carry out;

Figure 27 B is the schematic sectional view in the stage that machines in the forging processing that utilizes the forging mould of the second mode of execution to carry out.

Symbol description in figure:

1: rotor blank; 2: rotor part; 2a a: end face; 3: center hole (axis hole); 3a a: end face; 4: blade groove; 4a a: end face; 5,6: clout portion; 5a: occlusive part; 5b: surrounding wall portion; 7: crackle; 13: blade part (blade groove shape die for forming); 97,98: drift; D3, D4: end face is poor; D5, D6: semidiameter; R: rotor; T5: occlusive part wall thickness; W: forging blank.

Embodiment

< rotor >

First the structure of the rotor (R) of manufacturing by the first mode of execution of the present invention is described.As shown in Figure 4, rotor (R) is the generally cylindrical body having as the center hole that makes axle at the axis hole of through (3), is provided with five bottom lands and expands as the blade groove (4) of cross section circle at outer circumferential face.Above-mentioned blade groove (4) is set to: parallel with cylindrical axis and penetrate into both ends of the surface, and be eccentric in above-mentioned center hole (3) and cut to the inside.In addition, as shown in Figure 5, the Offset (U) of above-mentioned blade groove (4) represents by the center line (L1) of well width direction and the distance of straight line (L2), and its cathetus (L2) is parallel with this center line (L1) and by the axis of rotor (R).

Material as rotor (R) adopts aluminum or aluminum alloy conventionally, as an example, can list and contain below Si:14～16 quality %, Cu:4～5 quality %, Mg:0.45～0.65 quality %, Fe:0.5 quality %, below Mn:0.1 quality %, below Ti:0.2 quality %, the aluminum alloy that remaining part is made up of Al and inevitable impurity.

The > of < manufacturing process

As shown in Figure 9, the manufacture method of rotor mainly comprises in the present embodiment: cut off operation, quality sorting operation, forging process, punching operation, heat treatment step and check operation, after these operations, as the shipment of rotor goods.

Cutting off operation and quality sorting operation is the operation for obtaining forging blank, in cut-out operation, continuous forged material is cut into predetermined length, obtaining after the continuous cast materials of predetermined length, carry out the each casting material of sorting according to quality (weight), thereby obtain desired forging blank.

Then forging in processing, obtained after rotor blank above-mentioned forging blank being forged to processing, in punching operation, clout portion has been obtained to rotor from the removal of rotor blank.

Afterwards, in heat treatment step, thereby rotor is carried out to heat treated and Quenching Treatment improves hardness and abrasion resistance is made rotor goods.And carry out final inspection in inspection operation, if without extremely shipment.

Below, the characteristic of the manufacture method of the rotor to present embodiment is elaborated.

< forging process >

Fig. 1,2A～2D are the figure that represents the forging mould of the forging apparatus using as the forging machining of the first mode of execution, and Fig. 3 is the figure that represents to utilize the rotor blank (1) that this forging forges with mould.

As shown in above-mentioned figure, forge and comprise with mould: lower mould (10) and apply the upper die (30) of the use load that is shaped.To use known die steel material as above-mentioned die material.

Lower mould (10) is split into: have shaped hole (12) lower mould main body (11), be configured in the base portion (15) of lower mould main body (11) downside and be configured in the axle sleeve (19) (lining) of lower mould main body (11) upside.

In the shaped hole (12) of above-mentioned lower mould main body (11), be extruded with five blade parts (13) for shaping blade groove (4) from hole inner circle wall face.Above-mentioned blade part (13) is corresponding with the sectional shape of blade groove (4), has the lamellar of rounded portions in end.Above-mentioned base portion (15) is tabular, be fixed with the centrepin (16) for the center hole (3) of the rotor that is shaped (R) at center, and run through to surround the mode of this centrepin (16) through hole (18) that ejector rod (17) use is set.Above-mentioned axle sleeve (19) is to have and the ring bodies of shaped hole (12) same diameter of lower mould main body (11) and the filling hole (20) of up/down perforation.

If assemble above-mentioned base portion (15), lower mould main body (11) and axle sleeve (19), centrepin (16) is inserted into the reversion shape that makes shaped hole (12) inside become rotor (R) in the shaped hole (12) of lower mould main body (11), and the filling hole (20) of axle sleeve (19) is communicated with shaped hole (12).In addition, the preparatory stage of the forging representing at Fig. 2 A, ejector rod (17) is inserted in the through hole (18) of base portion (15), and top end with the position standby that is equal height of base portion upper surface.

Upper die (30) is divided into: for forging blank (W) being applied to the upper die main body (31) of primary load (F), for applying circular pin (40) and the flat plate (41) of secondary load (F1), (F2).

Above-mentioned upper die main body (31), lower semi-body punch (32) is formed as to the generally cylindrical body of the external diameter corresponding with the through hole (20) of above-mentioned axle sleeve (19), and upper at upper surface formation recess (34) at large diameter upper semi-body (33).In this recess (34), be formed with: a circular port (35), the sectional shape of this circular port (35) and above-mentioned circular pin (40) is corresponding and this circular pin (40) can be advanced and retreat and be embedded; Five flat holes (36), the sectional shape of this flat hole (36) and above-mentioned flat plate (41) is corresponding and this flat plate (41) can be advanced and retreat and be inserted.Above-mentioned circular port (35) and flat hole (36) all penetrate into the top end of punch (32), and flat hole (36) are also in the outer circumferential face upper shed of punch (32).In addition, the position of above-mentioned circular port (35) and flat hole (35) is corresponding to the position of the centrepin (16) in lower mould main body (11) and blade part (13).

Above-mentioned circular pin (40) is the circular pin of the diameter centrepin (16) that is greater than lower mould main body (11), forms the abjunction preventing part (42) that diameter is greater than above-mentioned circular port (35) in upper end.Described flat plate (41) is on top have rounded portions lamellar same with the blade part (13) of lower mould main body (11), but than blade part (13) great Yi Quan, be provided with integratedly in upper end and compare the abjunction preventing part (43) that above-mentioned flat hole (36) expands sectional area.

And, as shown in Fig. 2 A and Fig. 6, when above-mentioned circular pin (40) is embedded into circular port (35) from the recess (34) of above-mentioned upper die main body (31), and when above-mentioned flat plate (41) is embedded in each flat hole (36), upper die main body (31), above-mentioned circular pin (40) and above-mentioned flat plate (41) be bonded with each other and punch (32) thus top end and side face form continuously respectively a cylindrical body.

In the top of above-mentioned circular pin (40) and flat plate (41), dispose the air cushion (45) for applying the load that they are applied.Piston rod (47) free to advance or retreat insert in cylinder (46), when piston rod (47) is applied to the power that is retracted into direction, the pressurized gas generation that above-mentioned air cushion (45) is enclosed by inside and the power of the direction of advance of the above-mentioned equilibrium of forces that is retracted into direction, and be retracted into also larger apart from the power of larger direction of advance.Cylinder (46) is fixed on mounting disc (48) by above-mentioned each air cushion (45), make the top of piston rod (47) and above-mentioned abjunction preventing part (42), (43) butt of circular pin (40) and flat plate (41), circular pin (40) and flat plate (41) are applied with under the state of the initial load being produced by the thrust of piston rod (47), above-mentioned upper die main body (31) and mounting disc (48) are installed.When piston rod (47) is retracted into when above-mentioned circular pin (40) and flat plate (41) rise in addition, circular pin (40) and flat plate (41) are applied and are retracted into distance load accordingly.Therefore mounting disc (48) and upper die (30) one liftings, but the secondary load (F1), (F2) that put on circular pin (40) and flat plate (41) are independent of primary load (F) and are controlled by air cushion (45).

The value of above-mentioned the first secondary load (F1) and the second secondary load (F2) can regulate by the setting of the action load of air cushion (45), and owing to being separately installed with air cushion (45) on circular pin (40) and flat plate (41), therefore they also can carry out load control independently., put on the primary load (F) of above-mentioned upper die main body (32), five the second secondary loads (F2) that put on the first secondary load (F1) of circular pin (40) and put on five flat plates (41) can be set as separately independently load.

Above-mentioned lower mould (10) and upper die (30) are configured to: make above-mentioned circular pin (40) and flat plate (41) be positioned at the centrepin (16) of lower mould (10) and the corresponding position of blade part (13).Therefore, as shown in Fig. 7 A, B, the first secondary load (F1) put on centrepin (16) directly over, the second secondary load (F2) put on blade part (13) directly over.Primary load (F) puts on centrepin (16) and blade part (13) part in addition.In addition, in the present invention, above-mentioned the first secondary load (F1) and the second secondary load (F2) are set to than the little value of primary load (F).

Next,, with reference to Fig. 2 A～2D, Fig. 7 A, 7B and Fig. 8, the method for forging forging blank (W) with above-mentioned forging mould for the rotor blank (1) of working drawing 4 is described.

As shown in Figure 2 A, to the required part coating oiling agent of lower mould (20) and upper die (30), columniform forging blank (49) is loaded in the filling hole (20) of axle sleeve (19).Above-mentioned forging blank (W) is manufactured by continuous cast materials being cut into the methods such as predetermined length as mentioned above, and is heated to predetermined temperature as required.As above-mentioned oiling agent, can exemplify aqueous graphite lubricating agent, oiliness graphite lubricant etc., in order not adhere, preferably use aqueous graphite lubricating agent and oiliness graphite lubricant between forging blank (W) and mould (10), (30) simultaneously.Coating amount is respectively 2～10g left and right.In addition, the pre-heating temperature in the situation that forging blank (W) is aluminum alloy is preferably 400～450 DEG C.

Start as shown in Figure 2 B from this state, when make upper die (30) decline forge being loaded into the forging blank (W) of lower mould (10) with primary load (F), in process in forging blank (W) is filled into shaped hole (12), the flat plate (41) that is applied with the circular pin (40) of the first secondary load (F1) less than primary load (F) and is applied with the second secondary load (F2) is by ejection.Make thus material flow in circular port (35) and flat hole (36).Follow the decline of upper die (30), circular pin (40) and flat plate (41) rise, and along with piston rod (47) is retracted into the increase of distance, the second secondary load (F2) that puts on the first secondary load (F1) of circular pin (40) and put on flat plate (41) also increases.So, for forging blank (W), circular pin (40) and flat plate (41) part are in addition applied to primary load (F), on the other hand, the part corresponding with circular pin (40) and flat plate (41) applied to the first secondary load (F1) and the second secondary load (F2) that are independent of primary load (F).

As shown in Figure 2 B, by above-mentioned circular pin (40) and flat plate (41) are applied to the first secondary load (F1) less than primary load (F) and the second secondary load (F2), circular pin (40) and flat plate (41) rise thus, and material is flow in circular port (35) and flat hole (36).Because material flow in circular port (35) and flat hole (36), act on thus the centrepin (16) of lower mould (10) and the power of blade part (13) is relaxed.Its result, as shown in Figure 7 B, metal flow (α 1) between the wall of shaped hole (12) and blade part (13) and being relaxed because this metal flow (α 1) makes the power (α 2) that blade part (13) is out of shape to the inside, in addition while shaping due to center hole (3), act on and the opposite direction of the power that blade part (13) is out of shape to the inside (α 2) direction towards the metal flow (α 3) of periphery, therefore by keeping above-mentioned power (α 2), the equilibrium of (α 3), just can suppress bending deflection and the torsional deflection of centrepin (16) and blade part (13).

The fit value of above-mentioned the first secondary load (F1) and the second secondary load (F2) can be set aptly according to the volume of centrepin (16) and blade part (13).Due to the more large escaped quantity that more increases material of above-mentioned volume, if the therefore constancy of volume of blade part (13), the volume of centrepin (16) is larger, increase by the first secondary load (F1) is more reduced the influx that flows into circular port (35), just can keep in balance.

Through above-mentioned process, as shown in Figure 2 C, in the time that upper die (30) drops to lower dead center, complete the shaping of rotor blank (1).

Then as shown in Figure 2 D, make upper die (30) increase, make ejector rod (17) increase forged rotor blank (40) is released.In the time that circular pin (40) and flat plate (41) leave rotor (1) and remove the power from below, the piston rod (47) of air cushion (45) turns back to initial position.

In above-mentioned operation, owing to suppressing the centrepin (16) of lower mould (10) and bending deflection and the torsional deflection of blade part (13), therefore can make the rotor blank (1) shown in Fig. 3 become the higher rotor blank of dimensional accuracy of center hole (3) and blade groove (4), and be out of shape and extend die life by inhibition.And expand the external diameter of rotor blank without the distortion in order to prevent blade part (13), do not produce waste of material so there is no the part of excision in subsequent handling.

In addition, by setting the first secondary load (F1) and the second secondary load (F2) for be less than primary load (F) value, therefore the material of being got rid of by circular pin (16) and blade part (13) becomes easily and flows, and therefore can make upper die (30) drop to circular pin (16) and blade part (13) to enter the height of circular port (35) and flat hole (36).Therefore pass through the movement of the material of center hole (3) and blade groove (4), made rotor blank (1) is formed with clout portion (5), (6) in the upper-end surface of rotor part (2) (an end face 2a) accordingly with the part of center hole (3) and blade groove (4).

In addition, owing to applying respectively the first secondary load (F1) and the second secondary load (F2), therefore the clout portion (6) on clout portion (5) and the blade groove (4) on center hole (3) forms respectively, and the plane shape of above-mentioned clout portion (5), (6) becomes the shape corresponding with the sectional shape of circular pin (40) and flat plate (41).

At this in the present embodiment, rotor blank (1) is made up of rotor part (2) and clout portion (5), (6), does not comprise clout portion (5), (6) in rotor part (2).

As shown in Figure 10,11, clout portion (5), (6) that form are like this set to from an end face (2a) of rotor part (2) side-prominent to one end, and center hole (3) and blade groove (4) are formed into the inside of each clout portion (5), (6).

In addition as shown in figure 12, the clout portion (5) of centre hole side has: by occlusive part (5a) inaccessible end face (3a) of center hole (3) with by the surrounding wall portion (5b) of the side face side obturation of center hole (3), and cross section is processed to roughly anti-U-shaped.Similarly as shown in figure 13, the clout portion (6) of blade groove side has: by occlusive part (6a) inaccessible end face (4a) of blade groove (4) with by the surrounding wall portion (6b) of the side face side obturation of blade groove (4), and cross section is processed to roughly anti-U-shaped.Surrounding wall portion (5b), (6b) in clout portion (5) is the part being configured in the scope of an end face (3a) from the end face (2a) of rotor part (2) to center hole (3) and blade groove (4), (4a) in addition, and occlusive part (5a), (6a) are configured in than an end face (3a) of center hole (3) and blade groove (4), (4a) more by a distolateral part.

In addition in the present embodiment, add man-hour in forging, by adjusting primary load (F), first, second secondary load (F1), (F2), thereby make in advance surrounding wall portion (5b), (6b) of clout portion (5), (6) crack (7), (7).This crackle (7), (7) are in order easily to remove clout portion (5) in aftermentioned punching operation, (6) and preformed.In addition in the present embodiment, in order simply and correctly to carry out the removal of clout portion (5), (6), clout portion (5), (6) are formed as to distinctive structure, will be described hereinafter for the detailed structure of clout portion (5), (6).

In addition in the present embodiment, add man-hour in forging, owing to applying the back pressure (back pressure) being formed by first, second secondary load (F1), (F2), therefore can prevent effectively the problem that clout portion (5), (6) are torn or tear off from rotor part (2), the clout portion (5) of desired structure described later, (6) can be formed with rotor blank (1).

Self-evident, the other end (lower end surface 2b) of the rotor part (2) in rotor blank (1) is upper, and center hole (3) and blade groove (4) are all open.

In the forging processing of present embodiment, primary load (F), the first secondary load (F1) and the second secondary load (F2) are set aptly according to the size of the shape of rotor blank (1) and each portion, material composition and processing temperature etc.For example, as manufacture by aluminum or aluminum alloy system diameter 40～70mm, height 30～60mm rotor (R) time setting value, can illustrate primary load (F) is that 270～325MPa, the first secondary load (F1) and the second secondary load (F2) are 29～89Mpa.

In addition, in the time that the first secondary load (F1) and the second secondary load (F2) are set too smallly, clout portion (5), (6) are likely torn, time too much in contrast to setting, make abirritation reduce in the effect of the power of center hole (16) and blade part (13), thereby the effect that suppresses bending deflection and torsional deformation is reduced.The in the situation that of reflectal rotor processed (R), be preferably 29～89MPa, more preferably the scope of 39～49MPa as mentioned above.In addition, in the secondary load applying unit of the such spring of air cushion (45), along with upper die (30) although the secondary load of decline first (F1) and the second secondary load (F2) increase, but the load of above-mentioned optimum range is initial load.

In addition, for applying the first secondary load (F1) and the second secondary load (F2) though secondary load applying unit do not limit, but preferably can follow the lifting of upper die (30) and the unit of load application.According to this viewpoint, preferably the unit of the such spring of air cushion, as other secondary load applying units, can illustrate mechanical type spring, hydraulic pressure installation, attenuator.

In addition as shown in Figure 8, the preferred following shape of plane shape of the clout portion (5) in rotor (1), (6): the shape of the expansion section that to have increased width (t) around centrepin (16) and blade part (13) be 0.1～3mm.In other words, preferably so that the mode that the gap (t) between gap (t) and flat hole (36) and the blade part (13) between circular port (35) and the centrepin (16) of upper die main body (31) is 0.1mm～3mm is set above-mentioned circular port (35) and flat hole (36).When the not enough 0.1mm of above-mentioned width (t), flow variation thereby likely make clout portion (5), (6) fracture of material while forging, and likely because fracture reduces the effect that prevents distortion.In the time exceeding 3mm, likely make the circular port (35) of upper die (30) and flat hole (36) mutually interfere.(t) is particularly preferably 1～2mm in gap.

< punching operation >

Figure 14 is the sectional view roughly representing as the perforating device (die set) of the residual part removal device using in piercing operation (residual part removing step).As shown in the drawing, this punch device comprises lower mould (8) and upper die (9), as described in detail below, can from rotor blank (1), remove in die-cut clout portion (5), (6) by punching processing.

Lower mould (8) comprising: lower panel (81) and be arranged on the lower mould main body (85) of the upper surface of this lower panel (81).

Lower panel (81) in the central portion is formed with the clout portion tap hole (82) connecting on above-below direction.The both sides of this external lower panel (81) are erect and are provided with guide rod (83) along Vertical direction.

Lower mould main body (85) is fixed on the upper surface of lower panel (81), so that inaccessible clout portion's tap hole (82).

Upper in this lower mould main body (85), be provided with accordingly workpiece setting portion (86) with the clout portion tap hole (82) of lower panel (81).Workpiece setting portion (86) is configured to and an end face (2a) side of rotor blank (1) can be arranged to rotor blank (1) towards downside.In this workpiece setting portion (86), be formed with accordingly centre hole side with centre hole side clout portion (5) and play nib (87), and form accordingly blade groove side with blade groove side clout portion (6) and play nib (88).The peripheral shape that this centre hole side plays its interior all shape of nib (87) and centre hole side clout portion (5) forms accordingly, thereby can be by chimeric with suitable state centre hole side clout portion (5).In addition blade groove side plays nib (88), and in it, the peripheral shape of all shapes and blade groove side clout portion (6) forms accordingly, thereby can be by chimeric with suitable state blade groove side clout portion (6).Each nib (87), (88) connect on above-below direction in addition, and lower end side is communicated with the clout portion tap hole (82) of lower panel (81).

And the clout portion (5) of rotor blank (1), (6) are embedded in to nib (87), (88) with suitable state respectively, upper by an end face (2a) of rotor part (2) being loaded in workpiece setting portion (86), can place with the state that rotor mould (1) is positioned in workpiece setting portion (86) thus.

Upper die (9) comprising: upper board (91) and be arranged on the die main body (95) of the lower surface of this upper board (91).

Upper board (91) is configured to free lifting on above-below direction, just can carry out lifting driving by lifting driver elements such as not shown oil hydraulic cylinders.

In addition, in the both sides of upper board (91) and the guide rod (83) of lower panel (83), bullport (93) is set accordingly, as described later in the time that upper board (91) declines, by guide rod (83) is inserted in bullport (93), can guide thus the decline of upper board (91) to move.

Upper die main body (95) is to be fixed on the lower surface of upper board (91) with the opposed mode of lower mould main body (85).

In upper die main body (95), playing nib (87) and blade groove side with the centre hole side in lower mould main body (85) respectively, to play nib (88) corresponding, corresponding with the center hole (3) and the blade groove (4) that are arranged on the rotor blank (1) in lower mould (85) respectively, in outstanding mode, centre hole side drift (97) and blade groove side blow head (98) are installed downwards respectively.

In the present embodiment, drift (97), (98) are configured to impact part.

Next, to using, the perforating device of said structure removes the clout portion (5) of rotor blank (1), the method for (6) describes.

First the workpiece setting portion (86) in the lower mould (8) of perforating device is upper arranges downward rotor blank (1) by an end face (2a) side of rotor blank (1), and to be applicable to the state of corresponding nib (87), (88), each clout portion (5), (6) is set.Under this arranges state, the centre hole side drift (97) of upper die main body (85) and blade groove side blow head (98) configure with the center hole (3) of rotor blank (1) and the other end side opening portion of blade groove (4) oppositely.

While making like this upper die (85) decline under the state that is provided with rotor blank (1), drift (97), (98) of upper die main body (85) are inserted into center hole (3) and blade groove (4) from upper-end surface (other end 2b) side of rotor blank (1), clout portion (5), (6) are clashed into pressurized state in each drift (97), (98), come die-cut clout portion (5), (6).Thus clout portion (5), (6) are removed from rotor (2), and this removed clout portion (5), (6) are discharged to the lower side via the clout portion tap hole (82) of lower panel (81).So as shown in Figure 15,16, one distolateral by the center hole (3) in open rotor blank (1) and blade groove (4), can obtain the rotor (R) that the two ends of center hole (3) and blade groove (4) are all opened.

Here in the present embodiment, clout portion (5), (6) are formed on an end face (2a) of rotor part (2) in the mode side-prominent to one end, therefore in the time of die-cut clout portion (5), (6), can make clout portion (5), (6) the correct position ground fracture at surrounding wall portion (5b), (6b), thus can highi degree of accuracy and correctly remove clout portion (5), (6).

Particularly in the present embodiment, as shown in Figure 12,13, due to the surrounding wall portion (5b) in clout portion (5), (6), (6b) upper crackle (7), (7) of forming, therefore can rupture effectively in the part of this crackle (7), (7), thereby can further accurately clout portion (5), (6) be removed from rotor (R).

In addition owing to forming crackle (7), (7) in fracture precalculated position, therefore can make the impact load of drift (97), (98) concentrate on the position of crackle (7), (7), thus can be effectively in this position fracture.Therefore, even also die-cut clout portion (5), (6) effectively of the load that reduces drift (97), (98).Owing to carrying out punch process with low load, therefore can effectively prevent from above producing harmful crackle and fracture taking high load as cause at rotor (R), thereby can manufacture the rotor goods of high-quality like this.Enumerate concrete example and describe, compare with the situation that does not have crackle (7), (7), in the situation that forming crackle (7), (7), drift load can be reduced to 1/2 left and right.

In addition owing to processing with low load, therefore can alleviate drift (97), (98) wearing and tearing own, can further improve the durability of drift (97), (98), and then improve the durability of punch device.In addition owing to being low load, therefore can reduce drift (97), (98) intensity own, even if for example adopt the laminal parts of thickness 2.5mm left and right as drift (97), (98), also there will not be problem.

In addition in the present embodiment, process the only peripheral part ground of the center hole in the end face of rotor blank (1) (3) and blade groove (4) by forging and form clout portion (5), (6), and only remove part clout portion (5), (6) by punching operation, therefore can reduce the capacity of clout portion (5), (6), reduce unnecessary material, thereby can improve stock utilization, can realize cost cutting.

In addition the piercing of present embodiment without rotor blank (1) is carried out to special heating but adopt cold working carry out.But also can in the present invention, before being about to carry out piercing, heat rotor blank (1), adopt hot working to carry out piercing.

But as in the present embodiment, make clout portion (5), (6) locate fracture and remove in the situation that at surrounding wall portion (5a), (6a), as shown in Figure 15,16, although produce overlap (5c), (6c) in fracture portion, but can according to circumstances remove this overlap (5c), (6c).Overlap removing step is for example set between punching operation and heat treatment step, therefore can removes overlap (5c), (6c), or between heat treatment step and inspection operation, overlap removing step is set.

In addition in the situation that recipient carries out smart cutting to end face, owing to removing overlap (5c), (6c) by this essence cutting, therefore not necessarily must in the manufacture process of rotor (R), remove overlap (5c), (6c).

In addition as described later, can be configured in the position equal with an end face (2a) of rotor part (2) or the position of inner side by the fracture surface when removing clout portion (5), (6), also can prevent from forming overlap (5c), (6c).

Next, enumerate an example of the rotor (R) in present embodiment, highi degree of accuracy is described in this routine rotor and removes effectively the best structure of clout portion (5), (6).

The rotor (R) of the example that first conduct will be manufactured, the length setting of axial direction is 30～60mm, external diameter (diameter) is set as 45～65mm, the diameter of center hole (3) is set as 10～15mm, the width of blade groove (4) is set as 2～4mm, is set as 15～20mm apart from the degree of depth of the outer circumferential face of blade groove (4).

In the rotor blank (1) using at the rotor (R) of manufacturing such a example, as shown in figure 12, by the thickness of the occlusive part of centre hole side (5a), from the top of clout portion (5) to the size of an end face (3a) of center hole (3) be made as " T5 ", by the height of surrounding wall portion (5b),, while being made as " Z5 " from an end face (5a) of the center hole (5) of clout portion (5) to the size of an end face (2a) of rotor part (2), the overhang (H5) of clout portion (5) equals " T5+Z5 ".

The now optimum structure in centre hole side clout portion (5), the overhang of clout portion (5) (H5) can be set as to 3.5～12mm, the thickness of occlusive part (5a) (T5) is set as to 3～10mm, the height of surrounding wall portion (5b) (T5) is set as to 0.5～2mm.Particularly, in the situation that occlusive part thickness (T5) is too small, can cause the fracture position while removing clout portion (5) unstable, shorten die life, and reduce dimensional accuracy.On the contrary in the situation that occlusive part thickness (T5) is excessive, stock utilization variation.

The pattern draft of clout portion (5) (θ 5) can be adjusted into 0～10 ° in addition, the radius of curvature of the rise part on the outer circumferential face of clout portion (5) (basic courses department) (r5) is adjusted into 0.5～3mm.

In addition as shown in figure 13, in blade groove side clout portion (6), also with above-mentioned same, the thickness (T6) that the overhang (H6) of clout portion (6) equals occlusive part (6a) adds the value of the height (Z5) of surrounding wall portion (6b).

And now the optimum structure in blade groove side clout portion (6) also with above-mentioned same.According to reason similar to the above, the overhang of clout portion (6) (H6) can be set as to 3.5～12mm, the thickness of occlusive part (6a) (T6) is set as to 3～10mm, the height of surrounding wall portion (6b) (Z6) is set as to 0.5～2mm.In addition with above-mentioned same, the pattern draft of clout portion (6) (θ 6) can be adjusted into 0～10 °, the radius of curvature of the rise part on the outer circumferential face of clout portion (6) (basic courses department) (r6) is adjusted into 0.5～3mm.

In the situation that forming clout portion (5), (6) as mentioned above, utilize drift (97), (98) die-cut clout portion (5), (6) exactly, thus can highi degree of accuracy and remove effectively clout portion (5), (6).The adjustment of radius of curvature (r5), (r6) is extremely important.In the time reducing radius of curvature (r5), (r6), easily crack (7) and can increase crackle (7), on the contrary in the time of increase radius of curvature (r5), (r6), be difficult to crack (7) thus reduce crackle (7).Therefore, just can control aptly size and shape, the position etc. of crackle (7) by adjusting radius of curvature (r5), (r6), further highi degree of accuracy and remove effectively clout portion (5), (6).

As mentioned above in the present embodiment, owing to removing clout portion (5), (6) by Punching Technology, the situation of therefore excising clout portion with inefficient machinings such as utilizing cutting is compared, can effectively remove clout portion (5), (6), therefore can enhance productivity.

And because clout portion (5), (6) are formed as the outstanding standing shape of an end face (2a) from rotor blank (1), therefore can simply and accurately remove clout portion (5), (6) by Punching Technology.

On the other hand at the rotor (R) of having removed clout portion (5), (6) by punching operation, as mentioned above, according to circumstances removing after overlap (5c), (6c), through heat treatment step shipment (with reference to Fig. 9) with checking operation.

< variation >

In the above-described embodiment, enumerate by the outstanding protuberance of the end face (2a) from rotor part (2) and form clout portion (5), (6), and be that example is illustrated by the situation that center hole (3) and blade groove (4) are formed into the position of an end face (2a) more lateral more inner than this clout portion (5), (6), but in the present invention, not necessarily an end face (3a), (4a) of center hole (3) and blade groove (4) must be formed into than an end face (2a) of rotor part (2) more in the outer part.

For example, shown in Figure 17,18, an end face (3a), (4a) of center hole (3) and blade groove (4) can be configured in to the position roughly the same with an end face (2a) of rotor part (2) and form center hole (3) and blade groove (4).

In this case, corresponding with the position of the end face (2a) in rotor part (2), in clout portion (5), (6) upper crackle (7), (7) of forming, and make clout portion (5), (6) fracture in this position, thereby remove clout portion (5), (6).Therefore remove the overlap behind clout portion (5), (6), form littlely compared with the overlap (5c) of above-mentioned mode of execution, (6c).

In addition as described in Figure 19,20, center hole (3) and blade groove (4) can be formed as, one end (3a), (4a) are configured in to an end face (2a) (another is distolateral) more in the inner part than rotor part (2).

In this case, form crackle (7), (7) from the erection position of the outer circumferential face of clout portion (5), (6) to the end corner location of center hole (3) and blade groove (4), and make clout portion (5), (6) fracture in this position, thereby remove clout portion (5), (6).Therefore on the removal vestige of clout portion (5), (6), center hole peripheral portion in an end face (2a) of rotor blank (1) and blade groove peripheral portion form the incised notch portion of chamfering shape, thereby can prevent effectively that overlap from forming.

In addition in the above-described embodiment, although in clout portion (5), (6) upper crackle (7), (7) of forming, but as explained with the second mode of execution below, in the present embodiment, also not necessarily must form crackle (7), (7).

On the other hand, in the above-described embodiment, although be to utilize from drift (97), (98) of another distolateral insertion of center hole (3) and blade groove (4) to come die-cut clout portion (5), (6), but in the present invention, in the time removing clout portion, be not limited to only utilize drift to carry out Punching Technology.

; can be from the outside of rotor blank (1); for example from the orthogonal direction of axial direction; clash into impact parts such as hammers; so that by this impact, the mode of abate clout portion is removed; or by impact parts such as severing instruments, by the root (base end part) of clout portion (5), (6) along with the orthogonal direction severing (cutting off) of axial direction thus cut away clout portion (5), (6).

In addition in the above-described embodiment, that centrepin (16) and blade groove formation blade part (13) are set in lower mould (10), and in forming blade groove (4), form center hole (3), but the formation method of center hole is not only limited to said method.For example can on forging blank, form in advance center hole forging before processing, can also only form in advance blade groove by the forging processing that the mould of centrepin carries out is not set, and by reprocessing, this rotor blank with blade groove be formed to center hole.

In addition in the above-described embodiment, be to use different devices to forge processing and clout portion Punching Technology, but be not only limited to this, in the present invention, also can utilize same device to forge processing and clout portion Punching Technology.

For example, in forging apparatus as shown in Figure 1, 2, to use blade part (13) and the centrepin (16) of longer parts as lower mould (10), add man-hour in forging, make upper die (30) to decline to carry out same forging processing with above-mentioned mode of execution with the stroke amount of degree.In clout portion Punching Technology subsequently, after above-mentioned forging processing, make upper die (30) to add many stroke amount decline in man-hour than forging, pass through thus blade part (13) and centrepin (16) die-cut clout portion (5), (6).

In addition in the above-described embodiment, to use the device of the type that blade groove formation blade part (13) and center hole formation pin (16) are set in the mould of the fixed side such as lower mould (10) as forging apparatus, but be not only limited to this, also can use in the present invention the forging apparatus of the type that blade groove formation blade part (drift) and center hole formation pin (drift) are set on the drawer at movable side moulds such as upper die (30).In this case, by using longer parts to form with drift and center hole formation drift as blade groove, thus can be with above-mentioned same, utilize a device (forging apparatus) to forge processing and clout portion Punching Technology simultaneously.

< the second mode of execution >

Figure 21～26 represent to process by the forging of the second mode of execution of the present invention the figure of the rotor blank (1) obtaining.As shown in above-mentioned figure, in this second mode of execution, rotor blank (1) is made up of rotor part (2) and clout portion (5), (6), and rotor part (2) does not comprise clout portion (5), (6).

Clout portion (5), (6) are set to from an end face (2a) of rotor part (2) side-prominent to one end.

The rotor blank (1) of present embodiment in addition, one end face (3a) of center hole (3) does not arrive the inside of clout portion (5), and an end face (3a) is configured in than an end face (2a) of rotor part (2) more in the inner part.

In addition an end face (4a) of blade groove (4) does not arrive the inside of clout portion (6) too, and an end face (4a) is configured in than an end face (2a) of rotor part (2) more in the inner part.

The other end (lower end surface 2b) of the rotor part (2) in rotor blank (1) in addition, center hole (3) and blade groove (4) are all opened.

At this as shown in Figure 25,26, one end face (2a) of rotor part (2) is set to 0～2mm with the end face poor (breaking length D3) of an end face (3a) of center hole (3), and the end face poor (breaking length D4) of an end face (2a) of rotor part (2) and an end face (4a) of blade groove (4) is set as 0～2mm too.

In addition, the semidiameter (D5) (footpath is poor) of the inner peripheral surface of the outer circumferential face of clout portion (5) and center hole (3) is made as 0.01～0.1mm, is preferably set to 0.05～0.1mm.In addition the semidiameter (D6) of the inner peripheral surface of the outer circumferential face of clout portion (6) and blade groove (4) is made as 0.01～0.1mm too, is preferably set to 0.05～0.1mm.

On the other hand as shown in Figure 22 B, in the present embodiment, in the semidiameter (D6) of clout portion (6) and blade groove (4), the semidiameter (D61) of rotor part outer circumferential side end and the semidiameter (D62) of inner circumferential side end form thicklyer than the semidiameter of middle main portion (D60).

In addition as shown in Figure 25,26 in the present embodiment, the radius of curvature (r3) between inner peripheral surface and an end face (3a) of the center hole (3) in rotor blank (1) is set as 0.2～1mm.In addition the radius of curvature (r4) between the inner peripheral surface of blade groove (4) and an end face (4a) is preferably set to 0.2～1mm too.By being set in this scope, as shown in figure 26, for example, when remove clout portion (5), (6) by punching, the mean value that remains in center hole (3) and the interior overlap distance center hole (3) of blade groove (4) inner side and the height (B1) of blade groove (4) internal face can be adjusted to preferred value.Particularly, the height of interior overlap (B1) can be set as below 1mm.Exceed 1mm at the height (B1) of this interior overlap in addition, can make fracture position become unstable, therefore the accuracy control of the inside dimensions of center hole (3) and blade groove (4) becomes difficulty.

In addition in the present embodiment, radius of curvature (r3a), (r4a) between outer circumferential face and an end face (2a) of the clout portion (5) in rotor blank (1), (6) can adjust to the radius of curvature (r3) of the above-mentioned inner peripheral surface side of clout portion (5), (6), below (r4).Particularly, preferably meet the relation of " r3a≤r3 ", " r4a≤r4 ".By being set in this scope, as shown in figure 26, for example, when remove clout portion (5), (6) by punching, the mean value of the height (B2) that remains in the protruding overlap on an end face (2a) can be adjusted to preferred value.Particularly, the height of protruding overlap (B2) can be set as below 1mm.In addition also can make fracture position stable, its result also reduces the deviation of the height (B2) of protruding overlap, therefore can make the bite management of rear operation become easily, make the dimensional accuracy management of center hole (3) and blade groove (4) become easy.Exceed 1mm at the height (B2) of this interior overlap in addition, can make fracture position become unstable, therefore the accuracy control of the inside dimensions of center hole (3) and blade groove (4) becomes difficulty.

The mould using in the present invention, it is the mould that the rotor blank with such shape is shaped, the circular port (35) of upper die has radius of curvature (r3a), flat hole (36) and has the reversion shape of radius of curvature (r4a), and the centrepin (16) of blade part (13) lower mould has the reversion shape of radius of curvature (r3), the reversion shape that blade part (13) has radius of curvature (r4).

In the present embodiment, use the forging processing device same with above-mentioned the first mode of execution to manufacture the rotor blank (1) of said structure.

; forging blank (49) is filled in to the filling hole (20) (with reference to as Fig. 2 A of the first mode of execution) of lower mould (10); and from this state, as shown in Figure 27 A, upper die (30) is declined.Like this, by making upper die (30) drop to lower dead center, as shown in Figure 27 B, be configured as the shape of rotor blank (1) thus.

Then,, after upper die (30) rises, with above-mentioned same, take out as the rotor blank (1) that forges processed goods.

In the present embodiment, drop to moment (when matched moulds) of lower dead center in upper die (30), the top end (upper-end surface) of centrepin (16) is relative with the opening surface (lower end position) of circular port (35), so that their consistent or separation.Described above thus, one end face (3a) of the center hole (3) in rotor blank (1) is configured in the inside that does not arrive more in the inner part and clout portion (5) than an end face (2a) of rotor part (2), and an end face (4a) of blade groove (4) is configured in the inside that does not arrive more in the inner part and clout portion (6) than an end face (2a) of rotor part (2).

At this, the top end of the center hole (16) when matched moulds equates with the breaking length (D3) of above-mentioned centre hole side with the interval of the opening surface of circular port (35) (the poor D3 of end face), be set to 0～2mm, and the top end of blade part (13) equates with the breaking length of above-mentioned blade groove side with the interval (the poor D4 of end face) of the opening surface of flat hole (36), is set to 0～2mm (with reference to Figure 25,26).

In addition the gap (semidiameter D5) between the outer circumferential face of centrepin (16) and the inner peripheral surface of circular port (35), equate with the inner peripheral surface of center hole (3) and the semidiameter (D5) of the inner peripheral surface of clout portion (5) of above-mentioned rotor blank (1), be set to 0.01～0.1mm, be preferably set to 0.05～0.1mm, and the gap (semidiameter D6) between the outer circumferential face of the outer circumferential face of blade part (13) and flat hole (36), equate with the inner peripheral surface in flat hole (36) and the semidiameter (D6) of the inner peripheral surface of clout portion (5) of above-mentioned rotor blank (1), be set to 0.01～0.1mm, be preferably set to 0.05～0.1mm (with reference to Figure 25, 26).

In addition, in the case of semidiameter (D5), (D6) or breaking length (D3), (D4) of clout portion periphery is excessive, cannot in piercing, remove accurately clout portion (5), (6), therefore likely because splitting traces produces baneful influence.In the situation that semidiameter (D5), (D6) are too small, before piercing, likely make clout portion (5), (6) inadvertently come off on the contrary.

To the rotor blank (1) of basis the second mode of execution obtaining like this, for example, with above-mentioned same, use perforating device removal clout portion (5), (6) that Figure 14 represents to manufacture rotor (R).

In the method for manufacturing rotor of this second mode of execution, except the effect of above-mentioned the first mode of execution, also there is following effect.

First in the rotor blank (1) of the forging processed goods as this second mode of execution, due to clout portion (5), (6) are set littlely with semidiameter (D5), (D6) of center hole (3) and blade groove (4), therefore can and remove exactly clout portion (5), (6) in preposition highi degree of accuracy.

Particularly in the present embodiment, due to breaking length (D3), (D4) of clout portion (5), (6) are formed thinlyyer, therefore can reduce the region of fracture while removing clout portion, therefore can remove simply with low load, thereby can enhance productivity.

When this external removal clout portion (5), (6), can utilize drift (97), (98) to come die-cut clout portion (5), (6) with low load, therefore harmful crackle and the fracture of generation in rotor part (R) being caused by high load can be effectively prevented, thereby the rotor goods of high-quality can be manufactured.

On this basis owing to processing with low load, therefore also can alleviate the wearing and tearing of drift (97), (98), can further improve the durability of drift (97), (98), and then improve the durability of punch device.

The region of fracture during in addition due to removal clout portion is less, therefore splitting traces (fracture surface) also reduces, thereby can avoid the baneful influence producing because of splitting traces, for example in rear operation without the fine finishing of carrying out for finishing splitting traces, owing to cutting down process number, therefore can further boost productivity and can cutting down cost.

And in the present embodiment, one end face (3a) of center hole (3) and blade groove (4), (4a) are configured in than an end face (2a) of rotor part (2) more in the inner part, therefore remove the inner peripheral surface that splitting traces after clout portion is disposed at center hole (3) and blade groove (4), be the inside of rotor (R), therefore this point also can prevent the baneful influence producing because of splitting traces, can omit effectively the rear fine finishing of splitting traces, thereby can further boost productivity.

In addition in the present embodiment, in the semidiameter (D6) of clout portion (6) and blade groove (4), due to by semidiameter distolateral rotor part periphery (D61) and interior week distolateral semidiameter (D62) form thicklyer than the semidiameter of middle main portion (D60), therefore can prevent from forging after processing, before piercing, clout portion (6) inadvertently comes off, for example can prevent effectively that clout portion (6) from remaining in the problem such as forge in die for processing, thereby can keep higher productivity.

On this basis in the present embodiment, because two end part semidiameter (D61), (D62) of clout portion (6) form thicklyer, therefore can prevent effectively the inadvertently fracture in this part, and can prevent more effectively that clout portion (6) from inadvertently coming off.That is, the two end part of clout portion (6) easily become and break apart initial point in the time coming off, but by two end part are formed thicklyer, thereby be difficult to produce fracture, therefore can prevent more effectively casual coming off.

In addition in the present embodiment, although be by semidiameter (D6) partial thickening of clout portion (6) periphery of blade groove (4) side, then be not only limited to this, in the present invention, also can be by semidiameter (D5) partial thickening of clout portion (5) periphery of center hole (3) side.

Embodiment

(embodiment 1)

The rotor blank (1) that Fig. 3 represents has been forged in the mould for forging (10), (30) that use Fig. 1 and Fig. 2 to represent.Above-mentioned rotor blank (1) is the blank of the aluminum alloy rotor processed (R) that represents for the manufacture of Fig. 4.

In above-mentioned rotor (R), external diameter is 52mm, highly the quantity that is 10mm, blade groove (4) for the diameter of 50mm, center hole (3) is 5, well width is that 3mm, groove depth are that 15mm, biasing size (U) are 10mm.In addition material alloys has been used A390.

In addition as described in Table 1, use in mould in above-mentioned forging, the gap (D5) of the circular port (35) of the centrepin of lower mould (10) (16) and upper die (30) is made as to 0.1mm, the gap (D6) in the blade part (13) of lower mould (10) and the flat hole (36) of upper die (30) also with the above-mentioned same 0.1mm that is made as.

In addition, the centrepin of lower mould (10) (16) and the interval (breaking length D3) of the opening surface of the circular port (35) of upper die (30) are made as to 1.5mm, the blade part (13) of lower mould (10) with above-mentioned same, is also made as 1.5mm with the interval (breaking length D4) of the opening surface in the flat hole (36) of upper die (30).

And, the forging blank (W) that is heated to 400 DEG C is filled in to lower mould (10), thereby and apply following shaping load and formed rotor blank (1).In this forging, increase the first secondary load (F1) and the second secondary load (F2), final load is respectively 1.5 times of initial load.

Primary load (F)=325MPa

The initial load of the first secondary load (F1): 32.9MPa (4.0kg/mm ²)

The initial load of the second secondary load (F2): 44.1MPa (4.5kg/mm ²)

Use the perforating device shown in above-mentioned Figure 14 to remove clout portion (5), (6) to the rotor blank (1) that obtains like this thus made rotor (R).

Rotor (R) is 82.9% with respect to the stock utilization (weight × 100 of the weight/forging blank (W) of rotor (R)) of forging blank (W).

Table 1

	D3、D4	D5、D6	Fracture when forging	Fracture position	Area of fracture
						Embodiment 1	1.5mm	0.1mm	Nothing	Inner peripheral surface	Little
Embodiment 2	0	0.1mm	Nothing	Inner peripheral surface	Little
						Comparative example 1	-2mm	0.1mm	Have	Outer circumferential face	Little
Comparative example 2	-2mm	2mm	Nothing	Outer circumferential face	Greatly

(embodiment 2)

As shown in table 1, except breaking length (D3), (D4) of clout portion (5), (6) are set as " 0 ", all the other are same with above-described embodiment 1, have made rotor (R).

(comparative example 1)

As shown in table 1, except breaking length (D3), (D4) of clout portion (5), (6) are set as " 2mm ", all the other are same with above-described embodiment, have made rotor (R).

(comparative example 2)

As shown in table 1, except breaking length (D3), (D4) of clout portion (5), (6) are set as to " 2mm ", the gap of clout portion periphery (D5), (D6) are set as to " 2mm " in addition, all the other are same with above-described embodiment, have made rotor (R).

(evaluation)

As shown in table 1, in embodiment 1,2 method for making, add man-hour in forging, clout portion (5), (6) do not occur inadvertently rupture or come off, and do not block, and have therefore completed processing.

In this external embodiment's 1,2 method for making, after piercing, the fracture surface of (clout portion removes rear) is less, and splitting traces (fracture surface) is formed on the inside of center hole (3) and blade groove (4).Therefore, even if splitting traces is not carried out to fine finishing without any problem yet.

On the other hand, in the method for making of comparative example 1, add clout portion in man-hour (5) in forging, (6) casual fracture has occurred, therefore fail successfully to process.

In addition in the method for making of comparative example 2, the large and splitting traces (fracture surface) of the fracture surface after piercing is configured to outstanding to outside.Therefore think and also must remove this splitting traces by fine finishing in the time that reality is used.

(test example 1～7)

Except radius of curvature (r3), (r3a) of center hole (3) side being adjusted into the value that table 2 represents, all the other have made rotor with the condition identical with above-described embodiment 1.And carry out the evaluation of interior overlap, protruding overlap (with reference to Figure 26).This result is shown in to table 2 in the lump.

Table 2

As can be clear and definite from upper table, by radius of curvature (r3), (r3a) are adjusted into specific value, thereby make the in stable condition of interior overlap and protruding overlap.

Radius of curvature (r4) to blade groove (4) side, (r4a) have also carried out test similar to the above in addition, and have obtained same evaluation.

No. 2008-164327, the Patent of the Japan patent application of the application based on application on June 24th, 2008, with the claim of priority of No. 2009-47963, the Patent of Japan's patent application of on March 2nd, 2009 application, its disclosed content directly forms the application's a part.

To be interpreted as be used in order to illustrate for term and performance as used herein, instead of for limit explain used, also be not precluded within any equivalent of the feature item of this expression and narration, and allow the various distortion in the scope of claim of the present invention.

The present invention is obtained so that multiple different modes are specific, but the disclosure should think to provide the embodiment of principle of the present invention, not to limit the invention on the basis of this record and/or illustrated preferred implementation understanding above-described embodiment, recorded multiple illustrated embodiments at this.

Although recorded several illustrated embodiment of the present invention at this, but the present invention is not limited to the various preferred implementations in this record, also comprise and make those skilled in the art's all mode of executions can be cognitive, that there is identical key element, amendment, deletion, combination (for example, relating to the Feature Combination of various mode of executions), improvement and/or change based on the disclosure.The restriction item of claim should be the term that uses based on this claim and broadly explaining, and should not be defined in the embodiment that this specification or the application record in whole checking process, and it is non-exclusive that such embodiment should be interpreted as.

Practicability in industry

The manufacture method of rotor of the present invention can be suitable in the time manufacturing the rotor of compressor etc.

Claims

1. a manufacture method for rotor, is characterized in that, comprises following operation:

Forging process, this forging process obtains rotor blank, and this rotor blank has: columned rotor part, this columned rotor part is arranged at intervals with multiple blade grooves along axial direction at peripheral part along circumferentially spaced; And clout portion, this clout portion is integrally formed in an end face of this rotor part in the mode side-prominent to one end and is formed on than an end face of described rotor part more by one distolateral, and by a distolateral obturation of described blade groove; With

Clout portion removing step, this clout portion removing step is removed this clout portion by making impact part clash into described clout portion from described rotor part, obtain thus the described blade groove rotor that at one end side is opened,

In described clout portion removing step, the drift as impact part is squeezed in described blade groove from the other end side opening portion of the described blade groove of described rotor blank, utilize this drift to remove described clout portion to one end Side Cutting.

2. the manufacture method of rotor according to claim 1, wherein,

In described rotor blank, described blade groove is formed into the inside of this clout portion.

3. the manufacture method of rotor according to claim 2, wherein,

Described clout portion has the surrounding wall portion of all sides obturation of described blade groove, in described clout portion removing step, makes described clout portion in its surrounding wall portion fracture and removes.

4. according to the manufacture method of the rotor described in claim 2 or 3, wherein,

In described clout portion, when the size from top to an end face of described blade groove is made as to the thickness of occlusive part, the thickness of this occlusive part is set as 3～10mm.

5. the manufacture method of rotor according to claim 1 and 2, wherein,

In described forging process, between described clout portion and described rotor part, form crackle in advance,

6. the manufacture method of rotor according to claim 1 and 2, wherein,

In described forging process, relatively squeeze into blade groove shape die for forming from the other end of columned forging blank, form described blade groove from other end to an end face, and,

7. the manufacture method of rotor according to claim 1 and 2, wherein,

Described clout portion is made as to blade groove side clout portion, described impact part is made as to blade groove side impact parts,

In described forging process, the described rotor part setting in described rotor blank is along the axis hole of axial direction, and one of the described axis hole of obturation distolateral axis hole side clout portion is integrally formed in to an end face of described rotor part in the mode side-prominent to one end,

In described clout portion removing step, make axis hole side clout portion described in axis hole side impact components hit, this clout portion is removed from described rotor part, thus described axis hole at one end side opened.

8. the manufacture method of rotor according to claim 7, wherein,

Drift as impact part is squeezed into described axis hole from the other end side opening portion of the described axis hole of described rotor blank, remove described axis hole side clout portion with this drift to one end Side Cutting.

9. the manufacture method of rotor according to claim 7, wherein,

In described forging process, axis hole shape die for forming is relatively squeezed into from the other end of columned forging blank, form described axis hole from other end to an end face, and,

10. the manufacture method of rotor according to claim 1, wherein,

In described rotor blank, described clout portion to be to be integrally formed in the end face in described rotor part to the side-prominent mode in one end, and an end face of described blade groove is configured in than an end face of described rotor part and does not arrive more in the inner part and described clout portion.

The manufacture method of 11. rotors according to claim 10, wherein,

In the time that the end face that the interval of an end face of an end face of the described rotor part in described rotor blank and described blade groove is made as to blade groove side is poor, the poor 0～2mm that is set as of end face of this blade groove side.

12. according to the manufacture method of the rotor described in claim 10 or 11, wherein,

In the time that the interval of the outer circumferential face of the inner peripheral surface of the described blade groove in described rotor blank and described clout portion is made as to the semidiameter of blade groove side, the semidiameter of this blade groove side is set as 0.01～0.1mm.

13. according to the manufacture method of the rotor described in claim 10 or 11, wherein,

The semidiameter of described blade groove side is different partly.

The manufacture method of 14. rotors according to claim 12, wherein,

In the semidiameter of described blade groove side, the semidiameter of at least any one party of end, inner circumferential side and outer circumferential side end, sets greatly with respect to the semidiameter of intermediate portion.

15. according to the manufacture method of the rotor described in claim 10 or 11, wherein,

In the rotor blank obtaining at described forging process, an end face of described axis hole is configured in than an end face of described rotor part and does not arrive more in the inner part and described axis hole side clout portion.

The manufacture method of 16. rotors according to claim 15, wherein,

In the time that the end face that the interval of an end face of an end face of the described rotor part in described rotor blank and described axis hole is made as to axis hole side is poor, the poor 0～2mm that is set as of end face of this axis hole side.

The manufacture method of 17. rotors according to claim 15, wherein,

When the interval of the outer circumferential face of the inner peripheral surface of the described axis hole in described rotor blank and described axis hole side clout portion is made as the semidiameter of axis hole side, the semidiameter of this axis hole side is set as 0.01～0.1mm.

The manufacture method of 18. rotors according to claim 15, wherein,

The semidiameter of described axis hole side is different partly.

The clout portion removal method of 19. 1 kinds of rotor blanks, it is the method for the described clout portion for removing rotor blank, described rotor blank has: columned rotor part, and this columned rotor part is arranged at intervals with multiple blade grooves along axial direction at peripheral part along circumferentially spaced; And clout portion, this clout portion is integrally formed in an end face of this rotor part in the mode side-prominent to one end and is formed on than an end face of described rotor part more by one distolateral, and by a distolateral obturation of described blade groove, and this removal method is characterised in that,

Drift as impact part is squeezed in described blade groove from the other end side opening portion of the described blade groove of described rotor blank, utilize this drift to remove described clout portion to one end Side Cutting, thereby by clashing into described clout portion as this drift of impact part and this clout portion being removed from described rotor part, at one end side is open to make thus described blade groove.