WO2021082451A1 - 一种双主轴机床 - Google Patents

一种双主轴机床 Download PDF

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Publication number
WO2021082451A1
WO2021082451A1 PCT/CN2020/094662 CN2020094662W WO2021082451A1 WO 2021082451 A1 WO2021082451 A1 WO 2021082451A1 CN 2020094662 W CN2020094662 W CN 2020094662W WO 2021082451 A1 WO2021082451 A1 WO 2021082451A1
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WO
WIPO (PCT)
Prior art keywords
machine tool
spindle
shaft
tool
clamp
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PCT/CN2020/094662
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English (en)
French (fr)
Inventor
阮思群
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温岭市大众精密机械有限公司
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Publication of WO2021082451A1 publication Critical patent/WO2021082451A1/zh

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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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles

Definitions

  • the invention relates to machining equipment, in particular to machine tools.
  • the rotation centerline of the main shaft has a large deflection, which can be expressed as: the rotation center line when the main shaft rotates is not perpendicular to the horizontal plane, but is close to vertical, resulting in a deflection when the main shaft rotates.
  • the technical problem solved by the present invention how to improve the processing efficiency of the machine tool.
  • a dual-spindle machine tool including a machine base, a machine tool cutting part arranged on the machine base, and a machine tool spindle mechanism
  • the machine tool cutting part includes a bracket, a translation frame, and a lifting seat , Tool device, the bracket is installed on the machine base, the translation frame is installed on the bracket through the translation drive device, the lifting seat is installed on the translation frame through the lifting drive device, the tool device is installed on the lifting seat, the tool device is equipped to cut the product Processing tool;
  • the number of the machine tool spindle mechanism is two, which are arranged side by side on the machine base, and the tool can be moved between the two machine tool spindle mechanisms under the drive of the translation driving device.
  • the tool under the drive of the translation drive device, the tool can move above the first spindle mechanism of the two machine tool spindle mechanisms, and under the drive of the lift drive device, the lift seat and the tool on it are lowered , The first spindle mechanism rotates to drive the product on it to rotate, and the tool cuts the product. After completion, the tool is raised and reset. Driven by the translation drive device, the tool moves to the top of the second spindle mechanism, and then descends to perform cutting processing on the product on the second spindle mechanism.
  • the worker can unload the processed product on the other spindle mechanism, and then clamp the product to be processed on the spindle mechanism. In this way, the processing efficiency of the machine tool can be improved.
  • the machine tool spindle mechanism includes a fixed part, a rotating part pivotally connected to the fixed part, and a power part for driving the rotating part.
  • the machine base is provided with a round hole
  • the fixed part is fixedly connected to the top of the round hole
  • the fixed part extends downward
  • a number of positioning bolts are screwed on the circumferential side wall of the fixed part, each positioning bolt is screwed with a positioning nut, the head of the positioning bolt is pressed against the side wall of the circular hole, and the positioning nut fastens the positioning bolt.
  • the spindle mechanism When the spindle mechanism is actually installed, after the spindle mechanism is assembled, that is, after the fixed part and the rotating part are assembled, the fixed part is fixedly connected to the top of the round hole, and then the positioning bolt is rotated, the positioning bolt is unscrewed out of the outer side wall of the fixed part, and the positioning bolt The head is pressed against the side wall of the round hole, and then the positioning nut is rotated, and the positioning nut is pressed against the outer side wall of the fixing part to fix the position of the positioning bolt.
  • the number of positioning bolts is at least three, and the plurality of positioning bolts are evenly distributed along the circumferential side wall of the fixed part.
  • the outer side wall of the fixed part is the circumferential side wall of the fixed part, and the outer side wall of the fixed part is circular.
  • the fixed part and the rotating part constitute a main shaft of a main shaft mechanism.
  • the main shaft mechanism of the present invention has two contact points with the machine base.
  • the first point is the connection between the fixed part and the top of the round hole
  • the second point is the contact between the positioning bolt on the fixed part and the side wall of the round hole.
  • the first contact is located in the upper half of the fixed part
  • the second contact is located in the lower half of the fixed part.
  • the positioning bolt can effectively position the fixed part, and further, the rotating part is positioned, which can avoid the deflection of the rotating part during rotation, or minimize the rotation of the rotating part.
  • the positioning bolt is adjusted to make it abut the side wall of the round hole.
  • the fixed part and the base are both up and down.
  • the present invention can avoid the generation of internal stress in the fixed part, and avoid the distortion and deformation of the fixed part when it is fixed to the machine base.
  • the present invention uses bolts and nuts to locate the fixed part, with less consumables, and the use of bolts and nuts. Both debugging and disassembly are more convenient.
  • Figure 1 is a schematic diagram of the machine tool of the present invention
  • FIG. 2 is a schematic diagram of the machine base 30
  • FIG. 3 is a schematic diagram of the machine base 30 in FIG. 1 after being hidden;
  • Figure 4 is an enlarged view of A in Figure 2;
  • Figure 5 is a schematic diagram of the machine tool spindle mechanism 02
  • Figure 6 is an exploded view of Figure 5;
  • FIG. 7 is a schematic diagram of the clamp part 201 viewed from below in FIG. 6.
  • Machine cutting part 011, bracket; 012, translation frame; 013, lifting seat; 014, tool device; 015, rotating disk; 016, tool; 017, motor for tool switching;
  • a machine tool includes a machine base 30, a machine tool cutting part 01 and a machine tool spindle mechanism 02 arranged on the machine base.
  • the machine tool cutting part 01 includes a bracket 011, a translation frame 012, a lifting seat 013, and a tool device 014.
  • the bracket is installed on the machine base 30.
  • the translation frame is installed on the bracket by a translation drive device, and the lifting seat is installed by a lifting drive device.
  • the tool device is installed on the lifting seat, and the tool device is provided with a tool for cutting the product.
  • both the translation driving device and the lifting driving device adopt a screw mechanism, the translation driving device drives the translation frame to move horizontally along the support, and the lifting drive device drives the lifting seat to move up and down along the translation frame to move the cutter of the cutter device to the product. Cutting the product.
  • the tool device 014 includes a motor for tool switching and a rotating disk 015 mounted on the motor shaft for tool switching.
  • a variety of tools 016 are mounted on the rotating disk.
  • the motor shaft for tool switching rotates at a certain angle, that is, it can be switched to one.
  • This kind of tool processes the product on the spindle mechanism 02 of the machine tool.
  • the angle of rotation of the motor shaft can be controlled by an encoder.
  • the machine tool spindle mechanism 02 includes a fixed part 10, a rotating part 20 pivotally connected to the fixed part, and a power part for driving the rotating part.
  • the base 30 of the machine tool is provided with a circular hole 31,
  • the fixed part is fixedly connected with the top of the round hole, and the fixed part extends downward into the round hole.
  • a number of positioning bolts 40 are screwed on the circumferential side wall of the fixing part 10, and a positioning nut 41 is screwed on each positioning bolt. The head of the positioning bolt presses against the side wall of the round hole, and the positioning nut fastens the positioning bolt. .
  • the spindle mechanism 02 When the spindle mechanism 02 is actually installed, after the spindle mechanism is assembled, that is, after the fixed part 10 and the rotating part 20 are assembled, the fixed part and the top of the round hole 31 are fixedly connected by threaded fasteners, and then the positioning bolt 40 is rotated. Screw out along the radial direction of the fixed part and out, the head of the positioning bolt is pressed against the side wall of the circular hole, and then the positioning nut is rotated, and the positioning nut is pressed against the outer side wall of the fixed part to fix the positioning The location of the bolts.
  • the number of positioning bolts is at least three, and the plurality of positioning bolts are evenly distributed along the circumferential side wall of the fixing part, and the head of each positioning bolt is against the side wall of the circular hole 31.
  • the rotating part 20 includes a clamp part 201 and a rotating shaft part 202 that are fixedly connected.
  • the bottom center of the clamp part is provided with a lower convex shaft 21, and the bottom edge of the clamp part is provided with a ring-shaped lower convex edge 22;
  • the rotating shaft part is provided with a hollow cavity filled with oil;
  • the top of the fixed part 10 is provided with a central hollow
  • the upper surface of the disc 11 is provided with a first oil passage 12;
  • the lower convex shaft 21 is inserted into the hollow cavity of the shaft part, the bottom of the clamp part is connected to the top of the shaft part, and the inner side wall of the lower convex edge 22 Cooperating with the outer side wall of the disc 11, the upper surface of the disc 11 and the bottom of the clamp part have an upper and lower gap.
  • the clamp part 201 When assembling the rotating part 20, the clamp part 201 is connected with the rotating shaft part 202. When connected, the lower convex shaft 21 is inserted into the hollow cavity of the rotating shaft part. The oil in the hollow cavity overflows through the top of the hollow cavity and diffuses to the surroundings. , The oil enters the first oil passage 12, so that the oil will not overflow the rotating part.
  • the function of the oil is: First, the clamp part carries the product, and the pressure is relatively large. This pressure is transmitted to the bottom of the clamp part and the lower convex shaft 21. The bottom of the clamp part is supported by the top of the shaft part, and the lower convex shaft It is supported by the oil in the hollow cavity.
  • the oil support can reduce the hard wear between the parts; second, the oil overflowing into the first oil passage, That is, the oil between the bottom surface of the clamp part and the top surface of the disc can lubricate the relative rotation between the clamp part and the disc; third, the oil in the hollow cavity can not only support but also
  • the lower convex shaft 21 is allowed to float left and right, up and down within a certain range. This kind of float is small, but it is of great significance to the assembly error generated when the clamp part is fixed to the rotating shaft part, and the float can absorb this assembly error.
  • the cooperation between the lower convex edge 22 and the periphery of the disc 11 can seal the oil between the bottom of the clamp part and the disc 11.
  • the rotating shaft portion 202 includes a rotating shaft 23, a bearing 24, a driven wheel 25, and a plug 26; the bearing is mounted on the rotating shaft, and the rotating shaft is pivotally connected to the fixed part 10 through the bearing; the driven wheel is mounted on the rotating shaft, and the power part passes through the driven wheel.
  • the rotating shaft provides rotational power; the hollow cavity is arranged at the center of the rotating shaft, that is, the rotating shaft is a hollow shaft, the plug is installed at the bottom end of the rotating shaft to seal the bottom end of the hollow cavity, and the top of the rotating shaft is provided with a disc-shaped connecting part 230 , The bottom of the clamp part 201 is fixedly connected to the disc-shaped connecting part.
  • the disc-shaped connecting part 230 fits in the hollow part at the center of the disc-shaped member 11.
  • the plug 26 is provided with an oil channel.
  • the high-pressure oil enters the hollow cavity of the rotating shaft through the oil channel. It is filled with oil and overflows through the top of the hollow cavity, that is, the top of the rotating shaft, and enters the first oil passage, that is, between the disc and the bottom surface of the clamp part. Due to the sealing of the lower convex edge 22, it does not overflow.
  • the oil in the hollow cavity has a supporting effect on the lower convex shaft 21 and the clamp part 201, and the oil between the disc and the bottom surface of the clamp part also has a supporting effect on the clamp part, and the bottom of the clamp part is fully stressed. And the force is even; among them, the oil between the disc-shaped piece and the bottom surface of the clamp part has a lubricating effect on the relative rotation between the disc-shaped part and the bottom surface of the clamp part.
  • the clamp part 201 includes an oil seal 27 and a clamp 28.
  • the lower convex shaft 21 is arranged at the center of the bottom of the clamp, the middle of the oil seal is hollowed out, and the lower convex edge 22 is arranged on the edge of the oil seal.
  • the top of the oil seal is fixedly connected with the bottom of the clamp, and the downward convex axis penetrates the oil seal downward.
  • the clamp is a three-jaw chuck commonly used in the prior art.
  • the bottom surface of the oil seal 27 is provided with a second oil passage 270, and the second oil passage is arranged up and down corresponding to the first oil passage 12.
  • the upper and lower gaps between the bottom surface of the oil seal and the disc 11, as well as the arrangement of the first oil passage and the second oil passage, enable more oil to be accommodated between the bottom surface of the oil seal and the disc 11, It has a good effect for the support of the disc-shaped member to the clamp part 201 and the lubrication between the disc-shaped member and the clamp part.
  • the fixed part 10 includes a cylindrical member 13 and the disc-shaped member 11.
  • the disc-shaped member is fixed on the top end of the cylindrical member, and an annular connecting portion 14 is provided on the circumferential side wall of the cylindrical member.
  • the connecting portion is connected with the top surface of the circular hole 31; the positioning bolt 40 is screwed on the circumferential side wall of the cylindrical member.
  • the annular connecting portion is provided with a plurality of connecting hole positions, and the plurality of connecting hole positions are evenly distributed along the circumferential direction of the annular connecting portion, and bolts are fitted in the connecting hole positions to fix the annular connecting portion on the top surface of the circular hole.
  • the annular connecting portion is close to the top of the cylindrical member 13, and the positioning bolt 40 is close to the bottom of the cylindrical member.
  • the driven wheel 25 is located below the circular hole 31, the driven wheel is connected to the motor 51 through a timing belt 50, and the motor is located behind the machine base 30.
  • the number of the machine tool spindle mechanism 02 is two, which are arranged side by side on the machine base 30. Accordingly, there are two sets of the synchronous belt 50 and the motor 51.
  • the base 30 is provided with an auxiliary wheel 32, and the rotating shaft 23 is provided with a balance wheel 34.
  • the balance wheel and the auxiliary wheel are connected by a belt 35.
  • the angle between the belt and the timing belt 50 is between 60 degrees and 180 degrees. Because the rotating part 20 receives the pulling force of the timing belt 50, the direction is single, which will increase the deflection of the rotating part. For this reason, the present invention designs auxiliary wheels 32, belts 35, and balance wheels 34, so that the rotating part is subjected to two directions. In this way, the possibility of deflection of the rotating part is reduced.

Abstract

一种双主轴机床，包括机座（30）、设置在机座（30）上的机床切削部分（01）和机床主轴机构（02）；机床切削部分（01）包括支架（011）、平移架（012）、升降座（013）、刀具装置（014），支架（011）安装在机座（30）上，平移架（012）通过平移驱动装置安装在支架（011）上，升降座（013）通过升降驱动装置安装在平移架（012）上，刀具装置（014）安装在升降座（013）上，刀具装置（014）设有对产品进行切削加工的刀具；机床主轴机构（02）的数量为两个，并列设置在机座（30）上，在平移驱动装置的驱动下，刀具能够在两个机床主轴机构之间移动。刀具对两个主轴机构中的一个主轴机构上的产品进行加工时，工人可以将另一主轴机构上已完成加工的产品卸下，再将待加工产品装夹在该主轴机构上。如此，可以提高机床的加工效率。

Description

一种双主轴机床 技术领域
本发明涉及机加工设备，具体涉及机床。
背景技术
对产品进行切削加工的机床，产品被夹持在主轴上，主轴旋转，带动产品旋转，刀具对产品进行切削。如果主轴的旋转中心线存在较大的偏摆，导致产品不能以其中心轴线旋转，那么，势必影响刀具对产品的加工质量。其中，主轴的旋转中心线存在较大的偏摆，可以表述成：主轴旋转时的旋转中心线与水平面并不是垂直的，只是接近垂直，导致主轴旋转时发生偏摆。
发明内容
本发明所解决的技术问题：如何提高机床的加工效率。
为解决上述技术问题，本发明提供如下技术方案：一种双主轴机床，包括机座、设置在机座上的机床切削部分和机床主轴机构；所述机床切削部分包括支架、平移架、升降座、刀具装置，支架安装在机座上，平移架通过平移驱动装置安装在支架上，升降座通过升降驱动装置安装在平移架上，刀具装置安装在升降座上，刀具装置设有对产品进行切削加工的刀具；所述机床主轴机构的数量为两个，并列设置在机座上，在所述平移驱动装置的驱动下，所述刀具能够在两个机床主轴机构之间移动。
按上述技术方案，在所述平移驱动装置的驱动下，所述刀具能够移动到两个机床主轴机构的第一主轴机构的上方，在升降驱动装置的驱动下， 升降座及其上的刀具下降，第一主轴机构旋转，驱动其上的产品旋转，刀具对产品进行切削加工。完成后，刀具上升复位，在平移驱动装置的驱动下，刀具移动到第二主轴机构的上方，再下降，对第二主轴机构上的产品进行切削加工。
刀具对两个主轴机构中的一个主轴机构上的产品进行加工时，工人可以将另一主轴机构上已完成加工的产品卸下，再将待加工产品装夹在该主轴机构上。如此，可以提高机床的加工效率。
所述机床主轴机构，包括固定部分、与固定部分枢接的旋转部分、驱动旋转部分的动力部分，机床的机座设有圆孔，固定部分与圆孔的顶部固定连接，固定部分向下伸入圆孔，固定部分的周向侧壁上螺接有若干定位螺栓，每一定位螺栓上螺接有定位螺母，定位螺栓头抵压在圆孔的侧壁上，定位螺母紧固定位螺栓。
实际安装主轴机构时，在主轴机构装配完成，即固定部分与旋转部分装配完成后，固定部分与圆孔的顶部固定连接，之后，转动定位螺栓，定位螺栓旋出固定部分的外侧壁，定位螺栓头抵压在圆孔的侧壁上，之后，旋转定位螺母，定位螺母抵压在固定部分的外侧壁上，以固定所述定位螺栓的位置。
作为一种选择，定位螺栓的数量至少为三个，若干定位螺栓沿固定部分的周向侧壁均匀分布。其中，固定部分的外侧壁即固定部分的周向侧壁，固定部分的外侧壁呈圆形。
所述固定部分和所述旋转部分构成主轴机构的主轴。
本发明所述主轴机构与机座的接触共有两处，第一处是固定部分与圆孔顶部的连接，第二处是固定部分上定位螺栓与圆孔侧壁的接触。其中， 第一处接触位于固定部分的上半部分，第二处接触位于固定部分的下半部分。
本发明所述主轴机构的技术效果在于：第一，定位螺栓能够对固定部分进行有效定位，进而，旋转部分得到定位，能够避免旋转部分在旋转时发生偏摆，或者，尽量减小旋转部分旋转时的偏摆幅度；第二，本发明是在固定部分与机座固定连接后，再调整定位螺栓，使其与圆孔侧壁相抵，相比于现有技术中固定部分与机座上下两处固定连接，本发明能够避免固定部分内应力的产生，避免固定部分在与机座固定时即发生歪曲变形；第三，本发明采用螺栓螺母对固定部分进行定位，耗材少，且螺栓螺母的调试和拆卸均比较方便。
附图说明
下面结合附图对本发明做进一步的说明：
图1为本发明所述机床的示意图；
图2为机座30的示意图；
图3为图1中机座30隐藏后的示意图；
图4为图2中A处放大图；
图5为机床主轴机构02的示意图；
图6为图5的爆炸图；
图7为图6中从下方观察夹具部分201所得的示意图。
图中符号说明：
01、机床切削部分；011、支架；012、平移架；013、升降座；014、刀具装置；015、旋转盘；016、刀具；017、刀具切换用电机；
02、机床主轴机构；
10、固定部分；11、盘形件；12、第一油道；13、筒状件；14、环形连接部；
20、旋转部分；21、下凸轴；22、下凸边缘；23、转轴；230、盘形连接部分；24、轴承；25、从动轮；26、堵头；27、油液密封件；270、第二油道；28、夹具；
201、夹具部分；202、转轴部分；
30、机座；31、圆孔；32、辅助轮；34、平衡轮；35、皮带；
40、定位螺栓；41、定位螺母；
50、同步带；51、电机；
60、产品。
具体实施方式
如图1，一种机床，包括机座30、设置在机座上的机床切削部分01和机床主轴机构02。
如图1，机床切削部分01包括支架011、平移架012、升降座013、刀具装置014，支架安装在机座30上，平移架通过平移驱动装置安装在支架上，升降座通过升降驱动装置安装在平移架上，刀具装置安装在升降座上，刀具装置设有对产品进行切削加工的刀具。作为一种选择，平移驱动装置和升降驱动装置均采用丝杆机构，平移驱动装置驱动平移架沿支架水平移动，升降驱动装置驱动升降座沿平移架升降，使刀具装置的刀具移至产品处，对产品进行切削加工。刀具装置014包括刀具切换用电机和安装在所述刀具切换用电机轴上的旋转盘015，旋转盘上安装有多种刀具016，所述刀具切换用电机轴旋转一定的角度，即能切换一种刀具对机床主轴机构02 上的产品进行加工。其中，电机轴旋转的角度可以通过编码器控制。
结合图2、图3、图4，所述机床主轴机构02，包括固定部分10、与固定部分枢接的旋转部分20、驱动旋转部分的动力部分，机床的机座30设有圆孔31，固定部分与圆孔的顶部固定连接，固定部分向下伸入圆孔。固定部分10的周向侧壁上螺接有若干定位螺栓40，每一定位螺栓上螺接有定位螺母41，定位螺栓的头部抵压在圆孔的侧壁上，定位螺母紧固定位螺栓。
实际安装主轴机构02时，在主轴机构装配完成，即固定部分10与旋转部分20装配完成后，固定部分与圆孔31的顶部通过螺纹紧固件固定连接，之后，转动定位螺栓40，定位螺栓沿固定部分的径向并向外旋出，定位螺栓的头部抵压在圆孔的侧壁上，之后，旋转定位螺母，定位螺母抵压在固定部分的外侧壁上，以固定所述定位螺栓的位置。作为一种选择，定位螺栓的数量至少为三个，若干定位螺栓沿固定部分的周向侧壁均匀分布，每一个定位螺栓的头部均与圆孔31的侧壁相抵。
结合图5、图6，旋转部分20包括固定连接的夹具部分201和转轴部分202。夹具部分的底部中央设有下凸轴21，夹具部分的底部边缘设有环形的下凸边缘22；转轴部分设有中空腔，中空腔中填充有油液；固定部分10的顶部设有中部镂空的盘形件11，盘形件上表面设有第一油道12；所述下凸轴21插入转轴部分的中空腔，夹具部分的底部与转轴部分的顶部连接，下凸边缘22的内侧壁与盘形件11的外侧壁配合，盘形件上表面与夹具部分的底部具有上下间隙。
装配旋转部分20时，夹具部分201与转轴部分202连接，连接时，所述下凸轴21插设在转轴部分的中空腔内，中空腔内的油液经中空腔的顶端 外溢，向周围扩散，油液进入第一油道12，如此，油液不会溢出旋转部分。油液的作用在于：第一，夹具部分承载产品，所受压力较大，该压力传递至夹具部分的底部，以及下凸轴21，夹具部分的底部由转轴部分的顶部支撑，而下凸轴由中空腔中的油液支撑，其中，相比于零件与零件之间的硬碰硬支撑，油液支撑能够减少零件与零件之间的硬磨损；第二，溢入第一油道的油液，即夹具部分底面与盘形件顶面之间的油液，能够对夹具部分与盘形件之间的相对旋转进行润滑；第三，中空腔中的油液，除了具有支撑作用外，还能够允许下凸轴21在一定幅度范围内左右、上下浮动，这种浮动是微量的，但对于夹具部分与转轴部分固定时产生的装配误差具有重要意义，浮动能够吸收这种装配误差。
所述下凸边缘22与盘形件11外围的配合，能够对夹具部分底部与盘形件之间的油液进行密封。
所述转轴部分202包括转轴23、轴承24、从动轮25和堵头26；轴承安装在转轴上，转轴通过轴承枢接在固定部分10中；从动轮安装在转轴上，动力部分通过从动轮向转轴提供旋转动力；所述中空腔设置在转轴的中心处，即转轴为空心轴，堵头安装在转轴的底端，对中空腔的底端进行密封，转轴的顶端设有盘形连接部分230，夹具部分201的底部与所述盘形连接部分固定连接。所述盘形连接部分230配合在盘形件11中心处的镂空部分中。
作为一种改进，所述堵头26设有油液通道，在主轴机构02本身装配完成，并且已安装在机座上的情况下，高压油经油液通道进入转轴的中空腔，中空腔中充满油液，并经中空腔的顶端即转轴的顶端外溢，进入第一油道即盘形件和夹具部分底面之间，由于所述下凸边缘22的密封而不再外 溢。如此，中空腔内的油液对下凸轴21及夹具部分201具有支撑作用，而且，盘形件和夹具部分底面之间的油液也对夹具部分具有支撑作用，夹具部分的底部全面受力且受力均匀；其中，盘形件和夹具部分底面之间的油液对盘形件和夹具部分底面之间的相对旋转具有润滑作用。
夹具部分201包括油液密封件27和夹具28，所述下凸轴21设置在夹具底部的中央处，油液密封件的中部镂空，所述下凸边缘22设置在油液密封件的边缘，油液密封件的顶部与夹具的底部固定连接，所述下凸轴向下穿过油液密封件。其中，夹具为现有技术中常用的三爪卡盘。
如图7，油液密封件27的底面设有第二油道270，第二油道与第一油道12上下对应设置。油液密封件底面与盘形件11之间的上下间隙，以及第一油道和第二油道的设置，使油液密封件底面与盘形件11之间能够容纳更多的油液，为盘形件对夹具部分201的支撑，以及盘形件与夹具部分之间的润滑具有良好作用。
如图6，所述固定部分10包括筒状件13和所述盘形件11，盘形件固定在筒状件的顶端，筒状件的周向侧壁上设有环形连接部14，环形连接部与圆孔31的顶端面连接；定位螺栓40螺接在筒状件的周向侧壁上。环形连接部设有若干连接孔位，若干连接孔位沿环形连接部的周向均匀分布，连接孔位中配合有螺栓，将环形连接部固定在圆孔的顶端面上。所述环形连接部接近筒状件13的顶部，而所述定位螺栓40接近筒状件的底部，如此设计，能够使筒状件得到稳定的定位。
如图3，从动轮25位于圆孔31的下方，从动轮通过同步带50与电机51连接，电机位于机座30的后方。为了提高加工效率，所述机床主轴机构02的数量为两个，并列设置在机座30上，相应地，同步带50与电机 51均为两套。
机座30上设有辅助轮32，转轴23上设有平衡轮34，平衡轮与辅助轮通过皮带35连接，皮带与同步带50的夹角界于60度至180度之间。由于旋转部分20受到同步带50的拉力，方向是单一的，这会增加旋转部分的偏摆，为此，本发明设计了辅助轮32、皮带35、平衡轮34，使旋转部分受到两个方向的拉力，如此，旋转部分偏摆的可能性得到降低。
以上内容仅为本发明的较佳实施方式，对于本领域的普通技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种双主轴机床，包括机座(30)、设置在机座上的机床切削部分(01)和机床主轴机构(02)；
    所述机床切削部分(01)包括支架(011)、平移架(012)、升降座(013)、刀具装置(014)，支架安装在机座(30)上，平移架通过平移驱动装置安装在支架上，升降座通过升降驱动装置安装在平移架上，刀具装置安装在升降座上，刀具装置设有对产品进行切削加工的刀具；
    其特征在于：所述机床主轴机构(02)的数量为两个，并列设置在机座(30)上，在所述平移驱动装置的驱动下，所述刀具能够在两个机床主轴机构之间移动。
  2. 如权利要求1所述的双主轴机床，其特征在于：刀具装置(014)包括刀具切换用电机(017)和安装在所述刀具切换用电机轴上的旋转盘(015)，旋转盘上安装有若干刀具(016)。
  3. 如权利要求1所述的双主轴机床，其特征在于：所述机床主轴机构(02)包括固定部分(10)、与固定部分枢接的旋转部分(20)、驱动旋转部分的动力部分，机床的机座(30)设有圆孔(31)，固定部分与圆孔的顶部固定连接，固定部分向下伸入圆孔，其特征在于：固定部分的周向侧壁上螺接有若干定位螺栓(40)，每一定位螺栓上螺接有定位螺母(41)，定位螺栓头抵压在圆孔的侧壁上，定位螺母紧固定位螺栓。
  4. 如权利要求3所述的双主轴机床，其特征在于：旋转部分(20)包括固定连接的夹具部分(201)和转轴部分(202)；
    夹具部分的底部中央设有下凸轴(21)，夹具部分的底部边缘设有环形 的下凸边缘(22)；
    转轴部分设有中空腔，中空腔中填充有油液；
    固定部分(10)的顶部设有中部镂空的盘形件(11)，盘形件上表面设有第一油道(12)；
    所述下凸轴(21)插入转轴部分的中空腔，夹具部分的底部与转轴部分的顶部连接，下凸边缘(22)的内侧壁与盘形件(11)的外侧壁配合，盘形件上表面与夹具部分的底部具有上下间隙。
  5. 如权利要求4所述的双主轴机床，其特征在于：所述转轴部分(202)包括转轴(23)、轴承(24)、从动轮(25)和堵头(26)；轴承安装在转轴上，转轴通过轴承枢接在固定部分(10)中；从动轮安装在转轴上，动力部分通过从动轮向转轴提供旋转动力；所述中空腔设置在转轴的中心处，堵头安装在转轴的底端，对中空腔的底端进行密封，转轴的顶端设有盘形连接部分(230)，夹具部分(201)的底部与所述盘形连接部分固定连接。
  6. 如权利要求4所述的双主轴机床，其特征在于：夹具部分(201)包括油液密封件(27)和夹具(28)，所述下凸轴(21)设置在夹具底部的中央处，油液密封件的中部镂空，所述下凸边缘(22)设置在油液密封件的边缘，油液密封件的顶部与夹具的底部固定连接，所述下凸轴向下穿过油液密封件。
  7. 如权利要求6所述的双主轴机床，其特征在于：油液密封件(27)的底面设有第二油道(270)，第二油道与第一油道(12)上下对应设置。
  8. 如权利要求4所述的双主轴机床，其特征在于：所述固定部分(10)包括筒状件(13)和所述盘形件(11)，盘形件固定在筒状件的顶端，筒状件的周向侧壁上设有环形连接部(14)，环形连接部与圆孔(31)的顶端面 连接；定位螺栓(40)螺接在筒状件的周向侧壁上。
  9. 如权利要求5所述的双主轴机床，其特征在于：从动轮(25)位于圆孔(31)的下方，从动轮通过同步带(50)与电机(51)连接，电机位于机座(30)的后方，对产品进行切削加工的刀具位于机座的上方。
  10. 如权利要求9所述的双主轴机床，其特征在于：机座(30)上设有辅助轮(32)，转轴(23)上设有平衡轮(34)，平衡轮与辅助轮通过皮带(35)连接，皮带与同步带(50)的夹角界于60度至180度之间。
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