End face grinding and hole whirlwind boring and milling composite machine tool for machining disc and sleeve parts

Abstract

The utility model belongs to the technical field of machine tools, and particularly relates to an end face grinding and hole whirlwind boring and milling composite machine tool for machining disc and sleeve type parts. A clamp is used for clamping or releasing a workpiece, the clamp is connected with a workpiece spindle, the workpiece spindle and the clamp are arranged on a Z-axis moving platform, a grinding wheel spindle and a cutter spindle are arranged on an X-axis moving platform, and the X-axis moving platform drives the grinding wheel spindle and the cutter spindle to move in the X direction and make the grinding wheel spindle and the cutter spindle sequentially correspond to the clamp. The Z-axis moving platform drives the workpiece spindle and the clamp to move in the Z direction, so that the workpiece spindle and the clamp are close to or away from each other; the grinding wheel machines the end face of the workpiece; the cutter spindle is connected with the boring cutter or the milling cutter, the boring cutter or the milling cutter conducts hole machining on the workpiece, the cutter spindle drives the boring cutter or the milling cutter to rotate, and the workpiece spindle drives the clamp and the workpiece to rotate. Workpieces do not need to be disassembled and assembled when the end face and the inner hole are machined, and therefore the perpendicularity of the end face and the inner hole is guaranteed. More importantly, the effect of cyclone boring or cyclone milling can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and particularly relates to a compound machine tool for end face grinding and hole whirling boring and milling of disc sleeve parts. Background Art

[0002] In the field of traditional fine machining of compressor bearings, in order to ensure the high precision, high wear resistance and long service life of the bearings, the whole machining process is divided into multiple precise steps, including rough end face grinding, finish end face grinding, boring the inner hole and turning and grinding the inner hole and other processes. These processes each undertake different machining tasks and jointly complete the fine machining of compressor bearings. Rough end face grinding is the first process of fine machining of compressor bearings, and its main purpose is to remove most of the surplus on the surface of the blank parts, creating favorable conditions for subsequent fine machining. After rough end face grinding, finish end face grinding further finely processes the end face of the bearing to meet higher surface finish and dimensional accuracy requirements. The end face after finish grinding not only has high flatness, but also maintains good perpendicularity and coaxiality with other parts of the bearing (such as the inner hole). The inner hole is one of the key parts for the installation of compressor bearings, and its machining quality directly affects the rotation accuracy and service life of the bearings. The purpose of boring the inner hole or turning or grinding the inner hole is to remove the surplus on the inner hole surface and improve the roundness, cylindricity and surface roughness of the inner hole. Generally speaking, the fine machining of compressor bearings involves multiple precise machining processes and links, and each process has its specific purpose and characteristics. Through the mutual cooperation and fine operation of these processes, the requirements of high precision, high wear resistance and long service life of compressor bearings can be ensured.

[0003] However, in the prior art, at least multiple types of equipment are required to form a production line, with large investment and large floor area. Moreover, in the prior art, the equipment corresponding to each process is mostly set separately, increasing the coordination difficulty between processes. And the form and position tolerance requirements for the end face and the inner hole are high. When clamping in two separate processes, it is very difficult to ensure their perpendicularity. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a compound machine tool for end face grinding and hole whirling boring and milling of disc sleeve parts, which includes a grinding wheel spindle, a tool spindle, a workpiece spindle, a fixture, an X-axis moving platform and a Z-axis moving platform. The fixture is used for clamping or releasing the workpiece. The fixture is connected to the workpiece spindle. The workpiece spindle and the fixture are arranged on the Z-axis moving platform. The grinding wheel spindle and the tool spindle are arranged on the X-axis moving platform. The X-axis moving platform drives the two to move along the X direction and makes the two correspond to the fixture in sequence. The Z-axis moving platform drives the workpiece spindle and the fixture to move along the Z direction, so that the workpiece spindle and the fixture approach or move away from the above two.

[0005] The grinding wheel spindle is connected with a grinding wheel. When the grinding wheel performs end face machining on the workpiece, the grinding wheel spindle drives the grinding wheel to rotate, and the workpiece spindle drives the fixture and the workpiece to rotate;

[0006] The tool spindle is connected with a boring tool or a milling cutter. The boring tool or the milling cutter has a single cutting edge or more than two cutting edges. When the boring tool or the milling cutter performs hole machining on the workpiece, the tool spindle drives the boring tool or the milling cutter to rotate, and the workpiece spindle drives the fixture and the workpiece to rotate.

[0007] Preferably, the end face grinding and hole whirling boring and milling compound machine tool for machining disc sleeve parts further includes a controller and a current detection device. The current detection device, the Z-axis moving platform and the X-axis moving platform are respectively in signal connection with the controller. A driving motor is arranged on the grinding wheel spindle. The current detection device is in signal connection with the driving motor. The current detection device is used for detecting the current signal of the driving motor. The controller controls the moving speeds of the Z-axis moving platform and the X-axis moving platform according to the detected current signal, so that the workpiece on the fixture can adjust the feeding speed towards the grinding wheel according to the current signal.

[0008] Preferably, the boring tool or the milling cutter is provided with a front cutting edge and a rear cutting edge. During machining, the front cutting edge is closer to the workpiece spindle end than the rear cutting edge. The front cutting edge and the rear cutting edge are coaxially arranged, and their rotation radii are R1 and R2 respectively, and R1 < R2. The tool spindle drives the front cutting edge and the rear cutting edge to rotate. The front cutting edge performs rough machining, and the rear cutting edge performs finish machining.

[0009] Preferably, a corrector is further arranged on the Z-axis moving platform. The corrector and the grinding wheel spindle can be correspondingly arranged. The Z-axis moving platform drives the corrector to approach or move away from the grinding wheel spindle.

[0010] Preferably, the X-axis moving platform and the Z-axis moving platform are arranged in a T shape. The X-axis moving platform is arranged horizontally and is located at the front end of the moving direction of the Z-axis moving platform during machining.

[0011] Preferably, the X direction is perpendicular to the Z direction. Description of the Drawings

[0012] The above and other objects, features and advantages of the present invention will become clearer through the preferred embodiments of the present invention shown in the drawings. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale in actual size, and the focus is on showing the gist of the present invention.

[0013] Figure 1 Structural schematic diagram of the end face grinding and hole whirling boring and milling compound machine tool for machining disc sleeve parts provided for the embodiment;

[0014] Figure 2 is Figure 1 a structural schematic diagram from another perspective;

[0015] Figure 3 is Figure 1 a structural schematic diagram from another perspective;

[0016] Figure 4 is a structural schematic diagram of the boring cutter or milling cutter provided by the embodiment.

[0017] Reference signs in the drawings: grinding wheel a1, grinding wheel spindle a2, dresser a3, b1 is a boring cutter or milling cutter, tool spindle b2, front cutting edge b3, rear cutting edge b4, fixture c1, workpiece spindle c2, Z-axis moving platform d1, X-axis moving platform d2. Detailed implementation manners

[0018] To facilitate the understanding of the present utility model, the following will give a more comprehensive description of the present utility model with reference to the relevant drawings.

[0019] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated with it, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are only for the purpose of illustration.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this technology belongs. The terms used in the description of the present specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Please refer to Figures 1 to 4 , the present utility model provides a face grinding and hole whirling boring and milling compound machine tool for machining disc sleeve parts, which includes a grinding wheel spindle a2, a tool spindle b2, a workpiece spindle c2, a fixture c1, a Z-axis moving platform d1 and an X-axis moving platform d2. The fixture c1 is used to clamp or release the workpiece. The fixture c1 is connected to the workpiece spindle c2. The workpiece spindle c2 and the fixture c1 are arranged on the Z-axis moving platform d1. The grinding wheel spindle a2 and the tool spindle b2 are arranged on the X-axis moving platform d2. The X-axis moving platform d2 drives the two to move in the X direction and makes the two correspond to the fixture c1 in sequence. The Z-axis moving platform d1 drives the workpiece spindle c2 and the fixture c1 to move in the Z direction, so that the workpiece spindle c2 and the fixture c1 approach or move away from the above two;

[0022] The grinding wheel spindle a2 is connected with a grinding wheel a1. When the grinding wheel a1 performs end face machining on a workpiece, the grinding wheel spindle a2 drives the grinding wheel a1 to rotate, and the workpiece spindle c2 drives the fixture c1 and the workpiece to rotate;

[0023] The tool spindle b2 is connected with a boring tool b1 or a milling cutter b1. The boring tool b1 or the milling cutter b1 has single-edge or multi-edges. When the boring tool b1 or the milling cutter b1 performs hole machining on a workpiece, the tool spindle b2 drives the boring tool b1 or the milling cutter b1 to rotate, and the workpiece spindle c2 drives the fixture c1 and the workpiece to rotate.

[0024] The processing equipment for multiple processes of the present utility model is concentrated together, and some transmission or conveying mechanisms can be shared, reducing equipment investment and having a smaller floor area; secondly, since the processing equipment for multiple processes is arranged together, it is more beneficial to coordinate between processes and optimize the processing production line; furthermore, there is no need to disassemble and assemble the workpiece during end face and inner hole machining, thus ensuring its perpendicularity; more importantly, since the grinding wheel spindle a2, the tool spindle b2 and the workpiece spindle c2 can all rotate, the effect of whirling boring or whirling milling can be achieved during hole machining.

[0025] In a preferred embodiment, the end face grinding and hole whirling boring and milling composite machine tool for machining disc sleeve parts further includes a controller and a current detection device. The current detection device, the Z-axis moving platform d1, and the X-axis moving platform d2 are respectively signal-connected to the controller. A driving motor is provided on the grinding wheel spindle a2, and the current detection device is signal-connected to the driving motor. The current detection device is used to detect the current signal of the driving motor. The controller controls the moving speeds of the Z-axis moving platform d1 and the X-axis moving platform d2 according to the detected current signal, so that the workpiece on the fixture c1 can adjust the feeding speed towards the grinding wheel a1 according to the current signal. Specifically, the following Z direction is used as the front-back direction for reference. When grinding the front end face of the workpiece, if the value of the current signal detected by the current detection device becomes larger, the controller controls and reduces the forward moving speed of the Z-axis moving platform d1, that is, the forward moving speed of the workpiece on the fixture c1 becomes correspondingly smaller; if the value of the current signal detected by the current detection device becomes smaller, the controller controls and increases the forward moving speed of the Z-axis moving platform d1, that is, the forward moving speed of the workpiece on the fixture c1 becomes correspondingly larger, realizing that the workpiece can adjust the feeding speed towards the grinding wheel a1 according to the current signal. Compared with the existing end face grinding control process, by detecting the current signal to control the end face grinding, on the one hand, the current signal is easy to detect and convenient for automatic control; on the other hand, the efficiency of the entire end face grinding is improved. When grinding the left or right end face of the workpiece, if the value of the current signal detected by the current detection device becomes larger, the controller controls and reduces the moving speed of the X-axis moving platform d2 to the left or right, that is, the moving speed of the grinding wheel a1 towards the workpiece on the fixture c1 becomes correspondingly smaller; if the value of the current signal detected by the current detection device becomes smaller, the controller controls and increases the forward moving speed of the X-axis moving platform d2, that is, the moving speed of the grinding wheel a1 towards the workpiece on the fixture c1 becomes correspondingly larger.

[0026] Please refer to Figure 4 , in a preferred embodiment, both the boring tool b1 and the milling tool b1 are provided with a front cutting edge b3 and a rear cutting edge b4. The front cutting edge b3 and the rear cutting edge b4 can be integrally provided. The tool spindle b2 can drive the front cutting edge b3 and the rear cutting edge b4 to rotate together. During machining, the front cutting edge b3 is closer to one end b2 of the workpiece spindle than the rear cutting edge b4, that is, at the beginning of machining, the front cutting edge b3 is closer to the workpiece than the rear cutting edge b4, so that the front cutting edge b3 first performs hole machining. The front cutting edge b3 and the rear cutting edge b4 are coaxially arranged, and the rotation radii of the two are R1 and R2 respectively, and R1 < R2, that is, the rear cutting edge b4 protrudes outward along the radial direction compared with the front cutting edge b3. When performing hole machining, the front cutting edge b3 first performs rough machining, and then the rear cutting edge b4 performs finish machining, and there is no need to switch tools. And because the two are arranged front and back, as the front cutting edge b3 and the rear cutting edge b4 penetrate into the machining hole of the workpiece forward, rough machining and finish machining can be completed, optimizing the entire machining process, improving the machining efficiency, and prolonging the service life of the front cutting edge b3 located behind the rear cutting edge b4.

[0027] Please refer to Figures 1 to 3 , in a preferred embodiment, a corrector a3 is further provided on the Z-axis moving platform d1. The corrector a3 and the grinding wheel spindle a2 can be correspondingly arranged. The grinding wheel spindle a2 is horizontally arranged through the X-axis moving platform d2 so that the grinding wheel a1 and the dresser are corresponding in the Z direction. The Z-axis moving platform d1 drives the corrector a3 to approach or move away from the grinding wheel spindle a2. The main function of the dresser is to quickly restore the balance of the surface of the grinding wheel a1 and remove wear, thereby improving the use effect and service life of the grinding wheel a1.

[0028] Please refer to Figures 1 to 3 , in a preferred embodiment, the X-axis moving platform d2 and the Z-axis moving platform d1 are arranged in a T shape. The X-axis moving platform d2 is horizontally arranged, and the X-axis moving platform d2 is located at the front end of the moving direction during processing of the Z-axis moving platform d1. Through the above settings, it is more beneficial to the layout and switching during operation of both the grinding wheel spindle a2 and the tool spindle b2.

[0029] In a preferred embodiment, the X direction is perpendicular to the Z direction.

[0030] Please refer to Figures 1 to 4 , the working principle of the present utility model: The workpiece is manually or mechanically installed in the fixture c1, and the fixture c1 clamps the workpiece. The X-axis moving platform d2 moves the boring tool b1 or milling cutter b1, grinding wheel a1, grinding wheel spindle a2, and tool spindle b2 located thereon in the X direction (i.e., Figure 3 the left and right direction in the figure). The boring tool b1 or milling cutter b1 on the tool spindle b2 is switched according to requirements. The grinding wheel a1, boring tool b1, and milling cutter b1 can be aligned with the workpiece and the workpiece spindle c2 in sequence, forming three processing types. The Z-axis moving platform d1 moves the workpiece spindle c2 and the fixture c1 in the Z direction (i.e., the advancing or retreating direction of the workpiece) to one side of the grinding wheel a1, boring tool b1, or milling cutter b1, enabling the workpiece to be respectively aligned or in contact with the grinding wheel a1, boring tool b1, or milling cutter b1, and the workpiece enters the processing state when aligned or in contact with the grinding wheel a1, boring tool b1, or milling cutter b1. When the workpiece is aligned with the grinding wheel spindle a2 and the grinding wheel a1, end face grinding can be performed. If hole machining is required, the X-axis moving platform d2 moves the tool spindle b2 to align the boring tool b1 or milling cutter b1 installed thereon with the workpiece, and the boring tool b1 or milling cutter b1 and the second tool can perform hole machining on the workpiece. Since both the tool spindle b2 and the workpiece spindle c2 can rotate, the effect of whirling boring or whirling milling can be achieved during hole machining.

[0031] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of this specification, the descriptions with reference to terms such as "preferred embodiment", "another embodiment", "other embodiments" or "specific examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0033] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts, characterized in that: It includes a grinding wheel spindle, a tool spindle, a workpiece spindle, a fixture, an X-axis moving platform and a Z-axis moving platform, wherein the fixture is used to clamp or release the workpiece, the fixture is connected to the workpiece spindle, the workpiece spindle and the fixture are arranged on the Z-axis moving platform, the grinding wheel spindle and the tool spindle are arranged on the X-axis moving platform, the X-axis moving platform drives the two to move along the X direction and makes the two correspond to the fixture in sequence, and the Z-axis moving platform drives the workpiece spindle and the fixture to move along the Z direction to make the workpiece spindle and the fixture close to or away from the above two; The grinding wheel spindle is connected to a grinding wheel. When the grinding wheel performs end surface processing on the workpiece, the grinding wheel spindle drives the grinding wheel to rotate, and the workpiece spindle drives the fixture and the workpiece to rotate; The tool spindle is connected to a boring cutter or a milling cutter, and the boring cutter or the milling cutter has a single edge or more than two edges. When the boring cutter or the milling cutter performs hole processing on the workpiece, the tool spindle drives the boring cutter or the milling cutter to rotate, and the workpiece spindle drives the fixture and the workpiece to rotate.

2. The composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts as claimed in claim 1, characterized in that: It also includes a controller and a current detection device, the current detection device, the Z-axis moving platform and the X-axis moving platform are respectively connected to the controller signal, the grinding wheel spindle is provided with a driving motor, the current detection device is connected to the driving motor signal, the current detection device is used to detect the current signal of the driving motor, the controller controls the moving speed of the Z-axis moving platform and the X-axis moving platform according to the detected current signal, so that the workpiece on the fixture can adjust the feeding speed toward the grinding wheel according to the current signal.

3. The composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts as claimed in claim 1, characterized in that: The boring cutter or milling cutter is provided with a front blade and a rear blade. During processing, the front blade is closer to one end of the workpiece spindle than the rear blade. The front blade and the rear blade are coaxially arranged, and the rotation radii of the two are R1 and R2 respectively, R1<R2, and the tool spindle drives the front blade and the rear blade to rotate, the front blade performs rough processing, and the rear blade performs fine processing.

4. The composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts as claimed in claim 1, characterized in that: The Z-axis moving platform is also provided with a corrector, and the corrector can be arranged corresponding to the grinding wheel spindle. The Z-axis moving platform drives the corrector to approach or move away from the grinding wheel spindle.

5. The composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts as claimed in claim 1, characterized in that: The X-axis moving platform and the Z-axis moving platform are arranged in a T shape, the X-axis moving platform is arranged horizontally, and the X-axis moving platform is located at the front end of the moving direction of the Z-axis moving platform during processing.

6. The composite machine tool for end face grinding and hole whirlwind boring and milling of disc sleeve parts as claimed in claim 1, characterized in that: The X direction is perpendicular to the Z direction.

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