CN1050790C - 机床 - Google Patents
机床 Download PDFInfo
- Publication number
- CN1050790C CN1050790C CN94117824A CN94117824A CN1050790C CN 1050790 C CN1050790 C CN 1050790C CN 94117824 A CN94117824 A CN 94117824A CN 94117824 A CN94117824 A CN 94117824A CN 1050790 C CN1050790 C CN 1050790C
- Authority
- CN
- China
- Prior art keywords
- axis
- lathe
- workpiece
- rotation
- knife rest
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
- B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/16—Working surfaces curved in two directions
- B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2215/00—Details of workpieces
- B23C2215/44—Turbine blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5104—Type of machine
- Y10T29/5109—Lathe
- Y10T29/5114—Lathe and tool
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/304536—Milling including means to infeed work to cutter
- Y10T409/305544—Milling including means to infeed work to cutter with work holder
- Y10T409/305656—Milling including means to infeed work to cutter with work holder including means to support work for rotation during operation
Abstract
一种五轴机床,其刀架(4)可绕一回转轴线(7)回转,该回转轴线(7)与一铣刀头(6)绕其旋转的加工轴线(5)在铣刀区以一锐角相交。该交角最好是30°至60°,特别是45°。回转运动中只需对各轴作些少补偿运动,仍能使刀架(4)保持短小,从而使其变形小,因而保证了高稳定和高精度。此外,能够实现两侧在90°或更大范围的回转而不产生碰撞,从而使刀具切刃高度适应工件表面,取得高表面质量。此类机床特别适于铣削涡轮和发动机叶片及压缩机叶轮。
Description
本发明涉及一种机床,特别是一种能够加工形状复杂而表面质量要求高的零件的机床。
已知的这种机床有一个夹持工件的夹具以及一个刀架,该刀架带有一个可绕一加工轴绕旋转的铣刀头并可绕一回转轴线回转,该回转轴线与该加工轴绕成一确定的倾斜角并相交于铣刀头附近。这种类型的机床已见于波士顿数字公司的小册子“波士顿五轴精密成形系统”。在这类机床中,刀架可绕其回转的回转轴线在加工区与加工轴线相交,其优点在于,在使刀架回转以更好地适应工件表面的方位的过程中,只需要对各轴线作很小的补偿运动。
然而,上述小册也中的机床其回转轴线是垂直于加工轴线的,这就带来各种缺点。由于其刀架做成U形,结构相当复杂,特别是很长,因而作在刀架上的反作用力使刀架达致相当高程度的变形。由于这一原因,这种结构并不十分坚固,如果要求加工精确度很高,就会很困难或使工作十分吃重。
此外,刀架只能在一个平面内回转,夹具和工件的安排亦必然被约束在该平面内。这样就限制了回转范围,因为即使回转角明显小于90度也会产生碰撞。
本发明试图对此给予补救。本发明的目的在于提出一种这类的机床,其特征在于倾斜角为锐角,其结构简单而坚固因而精密度高但费用少。此外,它允许作大角度的回转,从而使刀具的位置能更大程度地适应工件表面的方位,因而能够以简单的结构取得高的工件成形表面质量。
本发明的机床特别适用于铣削涡轮机和发电机的叶片以及压缩机的叶轮,这些零件形状复杂而表面质量要求高。
以下参考附图对仅作示例的实施例作更加详细的描述。附图中:
图1表示本发明机床第一实施例在基本位置时的侧视图;
图2表示图1机床在刀架摆开时的正视图;
图3表示按图2中箭头III所指方向的机床侧视图;
图4示意地表示加工轴线运动的空间;
图5表示本发明机床第二实施例在基本位置时的侧视图。
本发明的机床在上述附图中很大程度上是示意地表示,因为本发明涉及结构的原理,将其付诸实践对于本领域的技术人员并无困难。
在平行管形立柱1的顶端,沿着一个垂直于图1图面的第一水平平移轴线,可位移地安装着一个第一溜板2,该第一溜板2携有一个第二溜板3,该第二溜板3同样可沿一个垂直于该第一平移轴线的第二水平平移轴线位移。第二溜板3携有一个刀架4,刀架4上一固定位置安装有一刀具,该刀具可绕一加工轴线5旋转,为一铣刀头6。刀架4以可绕回转轴7回转的形式安装在第二滑板3上。在立柱1的前侧,沿一个垂直的平移轴线安装了又一个溜板8,它可以向着或离开刀架4位移。该溜板8携有一个有夹具10可旋转地安装于其上的旋转工作台9(其零件在图1和3中予以省略)。夹具10的旋转轴线平行于第一平移轴线。
一个涡轮机叶片作为工件11可绕其纵轴线旋转地装夹在夹具10上。回转轴线7通过铣刀头6的尖,并在该处以倾斜角α=45°与加工轴线5相交。所有五个轴都可被驱动。其运动以程序控制的方式进行。
当然最重要的是铣刀头6和工件11之间的相对运动的可能性。机床的结构细节可以和上面描述的很不相同。在图5中表示了一个实施例,其第二溜板3可沿一垂直平移轴线移动,刀架4则悬伸于其下端,而第一溜板2以水平可位移的方式安装在立柱1的前侧。旋转工作台(未示出)安装在一个溜板上,该溜板可沿一水平平移轴线向着或离开立柱1移动。
回转轴线7与加工轴线5成锐角的结果使铣刀6的切刃与回转轴承的距离缩短,刀架4可以做成直的从而短的结构。铣刀头6的悬伸因而特别坚固,影响加工精度的刀架4的变形可以降低到最小。
此外,在两侧回转范围大至90°或更多成为可能,而且回转时铣刀头6并不位移或位移很小从而达致高的工作速度,因为刀架4不仅向下回转而且离开夹具10和工件11所在的垂直面而趋向立柱1,从而碰撞的危险显著减小。在这种回转中,加工轴线5画出一个锥形包络体的一个扇形区,该锥形包络体的轴线就是回转轴线7(见图4)。
本发明的优点在加工涡轮机成发动机叶片时特别有价值,加工这类叶片要达到很高的表面质量,因而要求铣刀头6的切刃位置精确适应工件11表面的方位。这就要求当铣刀头6被导引过工件11的曲面时刀架4能够回转过一个大的范围,否则这种回转就易产生碰撞问题。
加工如此进行,即夹具10和工件11由旋转工件台带动旋转,而铣刀头6的位置则通过绕回转轴线7回转和沿平移轴线位移而持续地予以适应。当一个铣削行程完成,溜板2平行于工件11的纵轴线移动一个进给宽度,然后夹具10按相反方向旋转。因而加工工作在纵向上按工作外形一个行程接一个行程地进行。旋转方向的改变最好在工件11的边上进行。
当加工压缩机叶轮时,同样可以从大的回转范围得到相当大的好处,特别是好的表面质量。
为了达到本发明的效果,并不需要将倾斜角做成恰好45°。即使一个稍微小于直角的锐角,配以适当的结构,也能产生所述的好处。当然,最好将倾斜角α定为30°至60°之间。
回转轴线7同样并非必须相交加工轴线5于正好通过铣刀头6的尖上。即使回轴线7只通过铣刀头6的靠近处,回转时亦只需作很小的补偿运动。
Claims (10)
1.一种机床,它包括:
一个旋转工作台,其结构和安排做成可驱动一个工件绕一纵轴线旋转;
一个夹持工件的夹具,用于将所述旋转工作台内的所述工件的两端夹紧,所述夹持工件的夹具被驱动旋转而同时夹住所述工件的所述两端从而使所述工件能够绕所述纵轴线旋转;
一个刀架,安装在所述旋转工作台邻近处并装有一个铣刀头,所述铣刀头带有一可绕一加工轴线旋转的刀具,
其特征在于,
所述刀架可绕一回转轴线回转,该回转轴线相对于所述加工轴线倾斜一个锐角并与所述刀具的所述加工轴线相交。
2.如权利要求1所述的机床,其特征在于,所述相对于所述加工轴线的倾斜角在30°至60°之间。
3.如权利要求2所述的机床,其特征在于,所述相对于所述加工轴线的倾斜角至少为45°。
4.如权利要求1所述的机床,其特征在于,所述刀架和所述夹持工件的夹具至少其中之一支承成能作相对另一个的往返运动。
5.如权利要求4所述的机床,其特征在于,所述运动包括沿三个不同方向的平移轴线的运动。
6.如权利要求5所述的机床,其特征在于,所述平移轴线是相互垂直的。
7.如权利要求5所述的机床,其特征在于,它还包括:
一个支持立柱;
一个支持在所述立柱上以便沿第一个所述平移轴线作平移运动的第一溜板;
一个支持在所述第一溜板上以便沿第二个所述平移轴线作平移运动的第二溜板;以及
所述刀架连接于所述第二溜板以便绕所述回转轴线相对于所述第二溜板回转;
所述第一和第二平移轴线之一平行于所述夹持工件的夹具的所述旋转轴线。
8.如权利要求5所述的机床,其特征在于,第一个所述平移轴线平行于所述夹持工件的夹具的所述旋转轴线。
9.如权利要求1所述的机床,其特征在于,所述旋转工作台的结构和安排做成使所述工件绕其旋转的纵轴线为水平定位。
10.如权利要求1所述的机床,其特征在于,当所述机床工作时所述刀架可绕所述回转轴线回转。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93120198A EP0659520B1 (de) | 1993-12-15 | 1993-12-15 | Werkzeugmaschine |
EP93120198.2 | 1993-12-15 |
Publications (2)
Publication Number | Publication Date |
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CN1107086A CN1107086A (zh) | 1995-08-23 |
CN1050790C true CN1050790C (zh) | 2000-03-29 |
Family
ID=8213492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN94117824A Expired - Fee Related CN1050790C (zh) | 1993-12-15 | 1994-11-28 | 机床 |
Country Status (9)
Country | Link |
---|---|
US (1) | US5727296A (zh) |
EP (1) | EP0659520B1 (zh) |
JP (1) | JPH07195218A (zh) |
KR (1) | KR950017075A (zh) |
CN (1) | CN1050790C (zh) |
CZ (1) | CZ286017B6 (zh) |
DE (1) | DE59309748D1 (zh) |
RU (1) | RU2139170C1 (zh) |
TW (1) | TW316866B (zh) |
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US4775270A (en) * | 1984-11-01 | 1988-10-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Impeller of centrifugal fluid-type rotary machine and manufacturing method thereof |
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ES403697A1 (es) * | 1972-06-09 | 1975-05-01 | Ercilla Sagarminaga | Perfeccionamientos introducidos en fresadoras. |
US3823645A (en) * | 1973-05-23 | 1974-07-16 | N Sjundjukov | Milling machine |
DE2614779A1 (de) * | 1976-04-06 | 1977-10-20 | Osoboje K Bjuro Stankostrojeni | Verfahren zur bearbeitung krummliniger oberflaechen von einzelteilen mittels rotierendem schneidwerkzeug und werkzeugmaschine zur ausfuehrung dieses verfahrens |
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-
1993
- 1993-12-15 EP EP93120198A patent/EP0659520B1/de not_active Expired - Lifetime
- 1993-12-15 DE DE59309748T patent/DE59309748D1/de not_active Expired - Fee Related
-
1994
- 1994-11-23 KR KR1019940030928A patent/KR950017075A/ko not_active Application Discontinuation
- 1994-11-28 CN CN94117824A patent/CN1050790C/zh not_active Expired - Fee Related
- 1994-11-28 TW TW083111066A patent/TW316866B/zh active
- 1994-12-09 CZ CZ943101A patent/CZ286017B6/cs not_active IP Right Cessation
- 1994-12-13 JP JP6333120A patent/JPH07195218A/ja not_active Withdrawn
- 1994-12-14 RU RU94043789A patent/RU2139170C1/ru not_active IP Right Cessation
-
1997
- 1997-02-19 US US08/802,594 patent/US5727296A/en not_active Expired - Fee Related
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US2785608A (en) * | 1951-05-23 | 1957-03-19 | Ardag Applied Res And Dev | Contour-milling method and means |
US4046057A (en) * | 1974-01-12 | 1977-09-06 | Mitsubishi Jukogyo Kabushiki Kaisha | Propeller milling machine |
US4028992A (en) * | 1975-11-20 | 1977-06-14 | Kuehnle Manfred R | Method and means for making helical races |
US4596501A (en) * | 1984-02-08 | 1986-06-24 | Pratt & Whitney Canada Inc. | Multiple cutter pass flank milling |
US4775270A (en) * | 1984-11-01 | 1988-10-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Impeller of centrifugal fluid-type rotary machine and manufacturing method thereof |
Also Published As
Publication number | Publication date |
---|---|
CZ310194A3 (en) | 1995-07-12 |
EP0659520B1 (de) | 1999-08-25 |
DE59309748D1 (de) | 1999-09-30 |
US5727296A (en) | 1998-03-17 |
RU94043789A (ru) | 1996-10-20 |
EP0659520A1 (de) | 1995-06-28 |
RU2139170C1 (ru) | 1999-10-10 |
CZ286017B6 (cs) | 1999-12-15 |
KR950017075A (ko) | 1995-07-20 |
TW316866B (zh) | 1997-10-01 |
CN1107086A (zh) | 1995-08-23 |
JPH07195218A (ja) | 1995-08-01 |
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