High-precision micro-hole grinding pressure rotor mandrel

Abstract

The utility model discloses a high-precision micro-hole grinding pressure rotor mandrel. Comprising a mandrel, a pressure rotor plate, a sleeve, a rear cover and a supporting piece, the rear end of the sleeve is connected with the rear cover, a supporting piece is arranged in the sleeve, the core shaft is arranged in the sleeve, and the core shaft is supported and fixed by the supporting piece; a guide mounting groove is formed in the front end of the mandrel, the pressure rotor plate is mounted in the guide mounting groove, a machining station is arranged at the front end of the pressure rotor plate, the pressure rotor plate is in threaded connection with the mandrel, the structure of the guide mounting groove is matched with the structure of the pressure rotor plate, and the guide mounting groove and the connecting surface of the pressure rotor plate form section positioning; the supporting piece comprises a front angular contact bearing, a rear angular contact bearing and a neck bush, the front angular contact bearing is arranged in a gap between the front end of the sleeve and the mandrel, the rear angular contact bearing is arranged in a gap between the rear end of the sleeve and the mandrel, the neck bush is arranged on the mandrel in a sleeving mode, and the neck bush is located between the front angular contact bearing and the rear angular contact bearing.

Description

Technical field:

[0001] The utility model belongs to the technical field of hole grinding equipment, and particularly relates to a high-precision micro-hole grinding pressure rotor core shaft. Background technology:

[0002] In the hole grinding equipment, the workpiece is mounted on the rotor. When processing micro-holes, the workpiece rotates with the rotor to complete the micro-hole processing. The accurate installation position of the rotor ensures the position accuracy of the micro-hole processing on the workpiece. When the rotor is repaired and replaced, there is often an error in the installation position between the rotor and the mandrel, which affects the coaxiality between the rotor and the mandrel, and also causes the end face of the rotor to run out when rotating, so that the rotor cannot rotate smoothly with the mandrel, which not only affects the position accuracy of the micro-hole processing on the workpiece, but also greatly increases the wear of the rotor and reduces the service life of the rotor.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility model content:

[0004] The utility model aims to provide a high-precision micro-pore grinding pressure rotor core shaft, thereby overcoming the defects in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a high-precision micropore grinding pressure rotor mandrel, including a mandrel, a pressure rotor plate, a sleeve, a back cover, and a support member; the rear end of the sleeve is connected to the back cover, a support member is arranged in the sleeve, the mandrel is arranged in the sleeve, and the mandrel is supported and fixed by the support member; a guide mounting groove is arranged at the front end of the mandrel, the pressure rotor plate is installed in the guide mounting groove, a processing station is arranged at the front end of the pressure rotor plate, the pressure rotor plate is threadedly connected to the mandrel, the guide mounting groove structure cooperates with the pressure rotor plate structure, and the guide mounting groove A cross-sectional positioning is formed with the connecting surface of the pressure rotor plate, so that the pressure rotor plate and the core shaft have extremely high coaxiality and extremely small end face runout value; the support member includes a front angular contact bearing, a rear angular contact bearing, and an inner sleeve, the front angular contact bearing is arranged in the gap between the front end of the sleeve and the core shaft, the rear angular contact bearing is arranged in the gap between the rear end of the sleeve and the core shaft, the inner sleeve is sleeved on the core shaft, and the inner sleeve is located between the front angular contact bearing and the rear angular contact bearing. Through the double angular contact bearing design, the core shaft and the pressure rotor plate can achieve micron-level rotation accuracy, reducing the wear of the pressure rotor plate.

[0006] Preferably, in the technical solution, the high-precision micro-hole grinding pressure rotor mandrel further includes an elastic member, which includes a spring sleeve and a compression spring. The spring sleeve and the compression spring are sleeved on the inner bushing. The spring sleeve contacts the rear angular contact bearing, and the compression spring is placed between the spring sleeve and the front angular contact bearing. By the cooperation of the spring sleeve and the compression spring, the bearing clearances of the front angular contact bearing and the rear angular contact bearing are eliminated.

[0007] Preferably, in the technical solution, the mandrel and the pressure rotor plate are of hollow structures, and a cooling channel is formed in the inner cavities of the mandrel and the pressure rotor plate. The cooling channel communicates with the machining station, and the workpiece can be cooled during workpiece machining.

[0008] Preferably, in the technical solution, a rear nut is arranged between the rear angular contact bearing and the rear cover. The rear nut is threadedly connected to the tail end of the mandrel, and a sealed waterproof structure is formed between the rear nut and the rear cover.

[0009] Preferably, in the technical solution, a labyrinth groove structure is formed at the connection between the rear nut and the rear cover. The labyrinth groove structure serves as a labyrinth-type sealed waterproof structure to prevent the coolant from entering the inside of the sleeve.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] Through the cooperation among the mandrel, the pressure rotor plate, the support member, and the elastic member, the mandrel and the pressure rotor plate have extremely high coaxiality and extremely small end face runout values. The pressure rotor plate can rotate smoothly following the mandrel, reducing the wear of the pressure rotor plate, extending the service life of the pressure rotor plate, and maintaining machining stability. BRIEF DESCRIPTION OF THE DRAWINGS:

[0012] Figure 1 is the front view of the high-precision micro-hole grinding pressure rotor mandrel of the present utility model;

[0013] Figure 2 is Figure 1 the sectional view taken along the A-A direction of DETAILED DESCRIPTION OF THE EMBODIMENTS:

[0014] The following describes in detail the specific embodiments of the present utility model, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

[0015] Unless otherwise clearly stated, throughout the specification and claims, the term "comprise" or its variations such as "comprises" or "including" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0016] Such as Figure 1-2As shown in the figure, a high-precision micro-hole grinding pressure rotor mandrel includes a mandrel 1, a pressure rotor plate 2, a sleeve 3, a rear cover 4, a support member, an elastic member, and a rear nut 5. The rear end of the sleeve 3 is connected to the rear cover 4. A support member is arranged inside the sleeve 3. The mandrel 1 is arranged inside the sleeve 3 and is supported and fixed by the support member. A guiding installation groove 14 is arranged at the front end of the mandrel 1. The pressure rotor plate 2 is installed in the guiding installation groove 14. A processing station 6 is arranged at the front end of the pressure rotor plate 2. The pressure rotor plate 2 is threadedly connected to the mandrel 1. The structure of the guiding installation groove 14 is matched with the structure of the pressure rotor plate 2, and a sectional positioning is formed at the connection surface between the guiding installation groove 14 and the pressure rotor plate 2. The mandrel 1 and the pressure rotor plate 2 are of hollow structures, and a cooling channel 13 is formed in the inner cavities of the mandrel 1 and the pressure rotor plate 2. The cooling channel 13 is communicated with the processing station 6, and the workpiece can be cooled during workpiece processing. The support member includes a front angular contact bearing 7, a rear angular contact bearing 8, and an inner bush 9. The front angular contact bearing 7 is arranged in the gap between the front end of the sleeve 3 and the mandrel 1. The rear angular contact bearing 8 is arranged in the gap between the rear end of the sleeve 3 and the mandrel 1. The inner bush 9 is sleeved on the mandrel 1 and is located between the front angular contact bearing 7 and the rear angular contact bearing 8. Both the front angular contact bearing 7 and the rear angular contact bearing 8 adopt H7000C angular contact bearings. The elastic member includes a spring sleeve 10 and a compression spring 11. The spring sleeve 10 and the compression spring 11 are sleeved on the inner bush 9. The spring sleeve 10 contacts the rear angular contact bearing 8. The compression spring 11 abuts between the spring sleeve 10 and the front angular contact bearing 7. By the cooperation of the spring sleeve 10 and the compression spring 11, the bearing clearances of the front angular contact bearing 7 and the rear angular contact bearing 8 are eliminated. A rear nut 5 is arranged between the rear angular contact bearing 8 and the rear cover 4. The rear nut 5 is threadedly connected to the tail end of the mandrel 1, and a sealed waterproof structure is formed between the rear nut 5 and the rear cover 4. A labyrinth groove structure 12 is formed at the connection between the rear nut 5 and the rear cover 4. The labyrinth groove structure 12 serves as a labyrinth-type sealed waterproof structure to prevent the coolant from entering the inside of the sleeve 3.

[0017] Through the hole-shaft fit and sectional fit at the connection between the mandrel 1 and the pressure rotor plate 2, the pressure rotor plate 2 and the mandrel 1 have extremely high coaxiality and extremely small end face runout values. By eliminating the bearing clearances of the double angular contact bearings through the elastic member, and through the double angular contact bearing design, the mandrel 1 and the pressure rotor plate 2 can achieve micron-level rotational accuracy and reduce the wear of the pressure rotor plate 2. During operation, the workpiece can smoothly rotate along with the pressure rotor plate 2 and the mandrel 1, extending the service life of the pressure rotor plate 2 and maintaining processing stability.

[0018] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A high-precision micro-pore grinding pressure rotor mandrel, characterized in that: It includes a core shaft, a pressure rotor plate, a sleeve, a rear cover, and a support member; the rear end of the sleeve is connected to the rear cover, a support member is arranged in the sleeve, the core shaft is arranged in the sleeve, and the core shaft is supported and fixed by the support member; a guide mounting groove is arranged at the front end of the core shaft, the pressure rotor plate is installed in the guide mounting groove, a processing station is arranged at the front end of the pressure rotor plate, the pressure rotor plate is threadedly connected to the core shaft, the guide mounting groove structure is matched with the pressure rotor plate structure, and the guide mounting groove and the pressure rotor plate connecting surface form a cross-sectional positioning; the support member includes a front angular contact bearing, a rear angular contact bearing, and an inner sleeve, the front angular contact bearing is arranged in the gap between the front end of the sleeve and the core shaft, the rear angular contact bearing is arranged in the gap between the rear end of the sleeve and the core shaft, the inner sleeve is sleeved on the core shaft, and the inner sleeve is located between the front angular contact bearing and the rear angular contact bearing.

2. The high-precision micro-pore grinding pressure rotor mandrel according to claim 1 is characterized in that: The high-precision micropore grinding pressure rotor core shaft also includes an elastic part, which includes a spring sleeve and a compression spring. The spring sleeve and the compression spring are sleeved on the inner sleeve, the spring sleeve contacts the rear angular contact bearing, and the compression spring is placed between the spring sleeve and the front angular contact bearing.

3. The high-precision micro-pore grinding pressure rotor mandrel according to claim 1 is characterized in that: The core shaft and the pressure rotor plate are hollow structures, and the inner cavities of the core shaft and the pressure rotor plate form cooling channels, which are connected to the processing stations.

4. The high-precision micro-pore grinding pressure rotor mandrel according to claim 1 is characterized in that: A rear nut is arranged between the rear angular contact bearing and the rear cover. The rear nut is threadedly connected to the tail end of the core shaft, and a sealed and waterproof structure is formed between the rear nut and the rear cover.

5. The high-precision micro-pore grinding pressure rotor mandrel according to claim 4 is characterized in that: A labyrinth groove structure is formed at the connection between the rear nut and the rear cover, and the labyrinth groove structure serves as a labyrinth-type sealing and waterproof structure.

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