阅读说明：本技术 一种数控龙门铣床用叶片打磨装置 (Blade grinding device for numerical control planer type milling machine ) 是由 张玉俊 鲁士军 于 2019-12-24 设计创作，主要内容包括：本发明公开了一种数控龙门铣床用叶片打磨装置,包括滑动组件和旋转组件,旋转组件贯穿于滑动组件。滑动组件：包括安装在机床主轴箱上的机座,机座下端固接有外滑套,外滑套内套设有内滑套,内滑套在外滑套中可作轴向滑动；旋转组件：包括与机床主轴固接的刀柄轴,刀柄轴下端滑动连接有打磨轴,打磨轴由轴承固定在内滑套上,通过滑接部与刀柄轴同轴连接,并和刀柄轴一起跟随机床主轴旋转。本发明中,通过采用自适应装置,使砂轮在磨削时能够自动适应叶片曲面的变形,而且磨削的压力可调,能够大幅提高机械打磨的效果。(The invention discloses a blade polishing device for a numerical control planomiller, which comprises a sliding component and a rotating component, wherein the rotating component penetrates through the sliding component. A sliding assembly: the machine comprises a machine base arranged on a main shaft box of a machine tool, wherein the lower end of the machine base is fixedly connected with an outer sliding sleeve, an inner sliding sleeve is sleeved in the outer sliding sleeve, and the inner sliding sleeve can axially slide in the outer sliding sleeve; a rotating component: the grinding device comprises a tool shank shaft fixedly connected with a machine tool spindle, wherein the lower end of the tool shank shaft is connected with a grinding shaft in a sliding mode, the grinding shaft is fixed on an inner sliding sleeve through a bearing, and is coaxially connected with the tool shank shaft through a sliding connection part and rotates along with the machine tool spindle together with the tool shank shaft. According to the invention, the self-adaptive device is adopted, so that the grinding wheel can automatically adapt to the deformation of the curved surface of the blade during grinding, the grinding pressure is adjustable, and the mechanical grinding effect can be greatly improved.)

1. The utility model provides a blade grinding device for numerical control planer-type milling machine which characterized in that: the device comprises a sliding component and a rotating component, wherein the rotating component penetrates through the sliding component;

the sliding assembly comprises a base arranged on a main shaft box of the machine tool, an outer sliding sleeve is fixedly connected to the lower end of the base, an inner sliding sleeve is arranged in the outer sliding sleeve, and the inner sliding sleeve can axially slide along the outer sliding sleeve;

the rotating assembly comprises a tool shank shaft fixedly connected with the machine tool spindle, the lower end of the tool shank shaft is connected with a grinding shaft in a sliding mode, and the tool shank shaft is coaxially connected with the grinding shaft through a sliding connection part and drives the grinding shaft to rotate;

the grinding shaft is fixed on the inner sliding sleeve through a bearing.

2. The abrading device of claim 1, wherein: the sliding connection part comprises a protruding part on the tool shank shaft and a concave part on the grinding shaft.

3. An abrading device as defined in claim 2, wherein: the convex part is a pin shaft which radially penetrates through the lower end of the tool shank shaft, the concave part is a blind hole in the upper end of the polishing shaft, the tool shank shaft is inserted into the blind hole, a strip-shaped open slot along the axial direction of the polishing shaft is formed in the wall of the blind hole, and the pin shaft is embedded into the open slot to drive the polishing shaft to rotate.

4. An abrading device as defined in claim 2, wherein: the lower end of the tool shank shaft is prismatic, the upper end of the polishing shaft is provided with a ridge groove, the protruding part is a ridge on the tool shank shaft, the recessed part is the ridge groove on the polishing shaft, and the lower end of the tool shank shaft is in clearance fit with the ridge groove.

5. A sanding device as defined in claim 1 or 2, characterized in that: the outer sliding sleeve is provided with a flange plate, the lower end of the inner sliding sleeve is fixedly connected with an end cover, the end cover is fixedly connected with a plurality of guide rods, the guide rods penetrate through the flange plate, and the free ends of the guide rods are provided with adjusting nuts.

6. An abrading device as defined in claim 5, wherein: at least one guide rod is a long guide rod, a pressure regulating spring is sleeved on the long guide rod, and the pressure regulating spring is clamped between the elastic nut and the flange plate.

7. An abrading device as defined in claim 5, wherein: the inner wall of the inner sliding sleeve is provided with a bearing outer ring stop dog, the polishing shaft is provided with a bearing inner ring stop dog, the polishing shaft is sleeved with a bearing retainer ring and a plurality of bearings, the bearing outer ring is clamped and fixed between the bearing outer ring stop dog and the end cover, the bearing inner ring is clamped and fixed between the bearing inner ring stop dog and the bearing retainer ring, and the bearing retainer ring is locked through a locking nut.

8. An abrading device as defined in claim 7, wherein: the lower end of the outer sliding sleeve is fixedly connected with a sliding sleeve sealing cover, a sealing ring is arranged between the inner sliding sleeve and the sliding sleeve sealing cover and/or the outer sliding sleeve, and a sealing ring is arranged between the bearing retainer ring and the end cover and/or the inner sliding sleeve.

9. An abrading device as defined in claim 7, wherein: the bearing is an angular contact bearing, and when the number of the bearings is more than one, the bearings are installed up and down oppositely, and a bearing spacer ring is arranged between the bearings.

10. A sanding device as defined in claim 1 or 2, characterized in that: the tool shank shaft is fixedly connected with a machine tool spindle through a tool shank chuck, the lower end of the polishing shaft is fixedly connected with a grinding wheel, and a lubricating oil pipe joint is arranged on the outer sliding sleeve.

Technical Field

The invention relates to the technical field of water turbine blade grinding, in particular to a device required for grinding a large blade on a numerical control gantry milling machine.

Background

The hydroelectric power station is mainly built in the middle upstream of a river, and the water level of the upstream and the downstream is dropped by building a dam, so that the turbine rotates by the impact of the water flow on a rotating blade to generate power. In a hydroelectric generating set, a water turbine is a hydraulic machine which converts the energy of water flow into rotational mechanical energy. The turbine runner generally comprises main parts such as an upper crown, blades and a lower ring. In the cast-weld structure runner, the blade is mostly cast martensitic stainless steel, and the crown and the lower ring are mostly low-alloy cast steel.

The cast blade of the water turbine needs to be subjected to ultrasonic flaw detection before machining so as to check whether casting defects or cracks exist in the blade. The electro-acoustic energy conversion of the probe of the ultrasonic flaw detector is an emission source of ultrasonic energy, and a plurality of point electro-acoustic sources form an ultrasonic beam and transmit the ultrasonic beam into a workpiece, which has certain requirements on the surface roughness of the workpiece to be detected and is also related to the frequency of the probe, the thickness of a protective film and the acoustic impedance. The smaller the surface roughness, the smaller the scattering (diffuse reflection) when using high-frequency flaw detection, otherwise, a large part of the incident sound wave is scattered on the surface, so the ultrasonic energy entering the workpiece is weakened, and the flaw detection effect is not good. In order to achieve the roughness required by ultrasonic flaw detection, the surface of the cast blade needs to be polished, and the process only requires the surface roughness of the polished blade and has no requirement on the precision of the size and the shape. Because the blade is a curved surface and a variable cross-section casting, and the deformation generated after the cast blade is cooled and the local convex hull and the local concave hull caused by sand falling cause the uncertain irregular difference between the blade blank and the computer model of the blade, the polishing process is very difficult no matter the common machine tool is used, or the computer model is used for carrying out numerical control programming on the numerical control machine tool. Therefore, the factory usually adopts a manual grinding mode, but the working environment of a grinder is very bad, dust and noise are large, and the physical health of the grinder is greatly damaged.

Disclosure of Invention

Aiming at the existing problems, the invention provides the blade grinding device used on the numerical control gantry milling machine, the self-adaptive device is adopted, so that the grinding wheel can automatically adapt to the deformation of the curved surface of the blade during grinding, the grinding pressure is adjustable, the difficulty in grinding and casting the blade by using the machine tool is solved, the grinding efficiency of the blade is greatly improved, and the working environment of workers is improved.

The technical scheme adopted by the invention is as follows:

a blade polishing device for a numerical control planomiller comprises a sliding component and a rotating component, wherein the rotating component penetrates through the sliding component;

the sliding assembly comprises a base arranged on a main shaft box of the machine tool, an outer sliding sleeve is fixedly connected to the lower end of the base, an inner sliding sleeve is sleeved in the outer sliding sleeve, and the inner sliding sleeve can axially slide along the outer sliding sleeve;

the rotating assembly comprises a tool shank shaft fixedly connected with the machine tool spindle, the lower end of the tool shank shaft is connected with a grinding shaft in a sliding mode, and the tool shank shaft is coaxially connected with the grinding shaft through a sliding connection part and drives the grinding shaft to rotate;

the grinding shaft is fixed in the inner sliding sleeve through a bearing and can axially slide in the outer sliding sleeve together with the inner sliding sleeve.

Further, the purpose of sliding connection portion is that make the axle of polishing slide from top to bottom for the handle axle, and can not be around handle axle axial rotation, has many structures all to realize this function, includes but not limited to following several structures:

the sliding connection part comprises a protruding part on the tool shank shaft and a recessed part on the polishing shaft, the protruding part is a pin shaft which radially penetrates through the lower end of the tool shank shaft, the recessed part is a blind hole in the upper end of the polishing shaft, the tool shank shaft is inserted into the blind hole, a strip-shaped open slot along the axial direction of the polishing shaft is formed in the wall of the blind hole, and the pin shaft can be embedded into the open slot so that the tool shank shaft can drive the polishing shaft to rotate together.

The sliding connection part comprises a protruding part on the tool shank shaft and a recessed part on the polishing shaft, the lower end of the tool shank shaft is prismatic, a ridge groove is formed in the upper end of the polishing shaft, the protruding part is a ridge on the tool shank shaft, the recessed part is a ridge groove in the polishing shaft, and the lower end of the tool shank shaft is in clearance fit with the ridge groove; note that, in the present application, the "edge groove" is a groove having an edge, such as a triangular prism, a cross-shaped cross-sectional column, or the like, with an irregular cross section.

There are many alternative equivalent or similar structures for the above sliding portion, and the application should be considered as falling within the scope of the application, although not enumerated in the specification.

Furthermore, a flange plate is arranged on the outer sliding sleeve, an end cover is fixedly connected to the lower end of the inner sliding sleeve, a plurality of guide rods are fixedly connected to the end cover, the guide rods penetrate through the flange plate, and loose nuts are arranged at the free ends of the guide rods;

furthermore, at least one guide rod is a long guide rod, a pressure regulating spring is sleeved on the long guide rod, and the pressure regulating spring is clamped between the elastic nut and the flange plate; the elastic nut on the long guide rod can be called as a pressure regulating nut, and the pressure of the adjustable spring is screwed out through the screwing-in of the pressure regulating nut, so that the pressure of the grinding wheel on the workpiece is regulated; the rest elastic nuts can be called limiting nuts, and the maximum sliding displacement of the guide rod can be adjusted by screwing in and screwing out the limiting nuts.

Furthermore, a bearing outer ring stop block is arranged on the inner wall of the inner sliding sleeve, a bearing inner ring stop block is arranged on the polishing shaft, a bearing retainer ring and a plurality of bearings are sleeved on the polishing shaft, the bearing outer ring is clamped and fixed between the bearing outer ring stop block and the end cover, the bearing inner ring is clamped and fixed between the bearing inner ring stop block and the bearing retainer ring, and the bearing retainer ring is locked by a locking nut;

still further, a sliding sleeve sealing cover is fixedly connected to the lower end of the outer sliding sleeve, a sealing ring is arranged between the inner sliding sleeve and the sliding sleeve sealing cover and/or between the inner sliding sleeve and the outer sliding sleeve, and a sealing ring is arranged between the bearing retainer ring and the end cover and/or between the bearing retainer ring and the inner sliding sleeve;

still further, the bearing is angular contact bearing, and when the bearing is more than one, the bearing is installed up and down relatively, and bearing spacer ring is arranged between the bearings.

Further, the tool shank shaft is fixedly connected with the machine tool spindle through the tool shank chuck, and the lower end of the polishing shaft is fixedly connected with a grinding wheel. The outer sliding sleeve is provided with a lubricating oil pipe joint, and lubricating oil enters the sliding surface between the outer sliding sleeve and the inner sliding sleeve through the pipe.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

according to the invention, the grinding device is arranged on the machine tool spindle, so that the grinding shaft provided with the grinding wheel rotates along with the machine tool spindle under the driving of the tool shank shaft, and can slide up and down in the outer sliding sleeve along with the inner sliding sleeve, thereby automatically adapting to various deformation of the curved surface of the blade, well solving the problem that the blade cannot be adaptively cast to randomly deform when the machine tool is used for grinding the blade, greatly reducing manual grinding operation, and being beneficial to ensuring the occupational health of workers. Moreover, the pressure of the grinding wheel on the workpiece can be adjusted through the arrangement of the pressure adjusting spring, so that the grinding effect can be adjusted.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 3 is a front view of the grinding spindle;

fig. 4 is a right side view of the sanding shaft.

Description of reference numerals:

the grinding machine tool comprises a machine tool spindle box 1, a machine base 2, an outer sliding sleeve 3, an inner sliding sleeve 4, a grinding shaft 5, a bearing 6, a bearing spacer ring 7, a long guide rod 8, a pressure regulating spring 9, a long guide rod locking nut 10, a pressure regulating nut 11, a tool shank shaft 12, a pin shaft 13, a first pin shaft check ring 14, a needle roller bearing 15, a second pin shaft check ring 16, a lubricating oil pipe joint 17, a limiting nut 18, a short guide rod 19, a short guide rod locking nut 20, an end cover 21, a bearing check ring 22, a locking nut 23, a grinding wheel base plate 24, a grinding wheel 25, a sliding sleeve sealing cover 26, a sliding sleeve sealing ring 27, a bearing sealing ring 28 and a tool shank chuck 29.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The invention relates to a blade polishing device for a numerical control planomiller, which comprises a sliding component and a rotating component, wherein the rotating component penetrates through the sliding component;

the sliding assembly comprises a machine base 2 arranged on a main shaft box 1 of the machine tool, an outer sliding sleeve 3 is fixedly connected to the lower end of the machine base 2, an inner sliding sleeve 4 is sleeved in the outer sliding sleeve 3, and the inner sliding sleeve 4 can axially slide along the outer sliding sleeve 3;

the rotating assembly comprises a tool shank shaft 12 fixedly connected with the main shaft of the machine tool and a grinding shaft 5 fixed in the inner sliding sleeve 4 through a bearing. The grinding shaft 5 is coaxially connected with the tool shank shaft 12 through a sliding connection part, and the sliding connection part can allow the grinding shaft 5 to axially slide relative to the tool shank shaft 12 when the tool shank shaft 12 drives the grinding shaft 5 to rotate along with the main shaft of the machine tool.

The grinding shaft 5 is sleeved with a bearing 6, and the bearing 6 is clamped on the inner sliding sleeve 4.

According to the invention, by installing the grinding device on the machine tool spindle, the grinding shaft 5 can freely slide up and down in the outer sliding sleeve 3 along with the inner sliding sleeve 4, and the grinding wheel 25 is fixed at the lower end of the grinding shaft 5, so that the grinding wheel can slide up and down along with the actual shape of the blade curved surface during grinding, the deformation of the blade curved surface is automatically adapted, the problem that the blade cannot be adaptively cast to randomly deform when the machine tool is used for grinding the blade is well solved, manual grinding operation is greatly reduced, and the occupational health of workers is favorably ensured.