CN212070406U - Air Spindle Mandrel Structure - Google Patents

Abstract

The utility model belongs to the technical field of machine tool spindles, in particular to an air spindle mandrel structure, which comprises a mandrel, a locking nut, a disk spring and a chuck; a blind hole is formed in one end of the mandrel, a taper hole is formed in the other end of the mandrel, and a through hole is formed between the taper hole and the blind hole; a plurality of pairs of disc springs are oppositely overlapped and arranged in the blind holes; the locking nut is arranged in the blind hole in a sliding manner; the clamping head is provided with a connecting end and a clamping end, and a cutter clamping hole is formed in the clamping end of the clamping head; DLC coatings are electroplated on the surfaces of the chuck, the locking nut and the disk spring, and the surfaces of the DLC coatings are pit surfaces. The hardness of the chuck, the lock nut and the disc spring is increased by electroplating DLC coatings on the surfaces of the chuck, the lock nut and the disc spring, the service life of the chuck, the lock nut and the disc spring is prolonged, and the machining precision of the spindle is increased.

Description

Air Spindle Mandrel Structure

technical field

The utility model belongs to the technical field of film conveying, in particular to an air spindle core shaft structure.

Background technique

The accuracy of the spindle in processing machine tools such as drilling machines and milling machines determines the accuracy of parts processing; therefore, it can be said that the spindle is one of the most important components of a machine tool. The main shaft of the milling machine and drilling machine is composed of a mandrel, a locking nut, a disc spring and a collet. The locking nut is connected with the collet, and the collet is matched with the taper hole of the mandrel to clamp the cutting tool. In the prior art, the lock nut, the collet and the mandrel are all formed by heat treatment and grinding, so certain hardness and roughness requirements are met. However, the surface hardness obtained only after heat treatment is up to 62HRC, but the threaded part of the collet and the lock nut is a thin-walled structure, so the surface hardness after heat treatment cannot be too high, so it determines the internal parts of the mandrel. The hardness should not be too high, so when assembling the various parts together, especially the quasi-hole fit of the chuck and the mandrel, the connection between the thread of the chuck and the nut of the nut, and the fit of the nut in the mandrel, it is necessary to rub against each other. , As the use time increases, the degree of wear increases, thereby reducing the use accuracy and shortening the service life of the spindle.

Utility model content

The purpose of the utility model is to provide an air spindle mandrel structure, which aims to solve the problem that the chuck, the nut and the disc spring in the spindle of the current machining equipment are easy to wear.

In order to achieve the above purpose, the air spindle mandrel structure provided by the embodiment of the present invention includes a mandrel, a locking nut, a disc spring and a collet; one end of the mandrel is provided with a blind hole, and the other end is provided with a tapered hole , a through hole is arranged between the tapered hole and the blind hole; a plurality of pairs of the disc springs are superimposed relative to each other and are arranged in the blind hole; the locking nut is slidably fitted in the blind hole; The collet has a connecting end and a clamping end, and the collet is provided with a clamping hole penetrating both ends; the surfaces of the collet, the locking nut and the disc spring are all electroplated with DLC coating, The surface of the DLC coating is a pit surface.

Further, the surfaces of the collet, the locking nut and the disc spring are all electroplated with a honeycomb-shaped DLC coating.

Further, the outer circumference of the locking nut is provided with two ring grooves, and the two ring grooves are used for storing lubricating oil.

Further, open elastic slits are also provided around the locking nut, and a resilient hole is provided at the closed end of the open elastic slit.

Further, a plurality of the opening elastic slits are evenly arranged, and the adjacent opening elastic slits are perpendicular to each other.

Further, an air hole is also provided in the collet, one end of the air hole communicates with the tool clamping hole, and the other end penetrates the collet; the air hole is used for communicating with the air supply device.

Further, a reinforcing shaft is also arranged in the air hole, and an air receiving hole is arranged in the reinforcing shaft.

The above one or more technical solutions in the air spindle mandrel structure provided by the embodiment of the present invention have at least the following technical effects:

1. The dimple-shaped DLC coating is plated on the chuck to increase the storage capacity of lubricating oil, improve the surface finish and hardness of the chuck, and make it more suitable for sliding and wear-resistant work requirements. The concave DLC coating is plated on the disc spring to improve the surface hardness of the disc spring, effectively solve the problem of easy fatigue and wear, and prolong the service life. The dimple-shaped DLC coating is added to the surface of the lock nut, which not only increases the surface hardness, but also better lubricates the movement and fit gap, and improves the wear resistance; The surface of the spring is electroplated with DLC coating to increase the hardness of the collet, the lock nut and the disc spring, as well as increase its service life and increase the machining accuracy of the spindle.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present utility model. For some novel embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a cross-sectional view of an air spindle mandrel structure provided by an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mandrel of the air-spindle mandrel structure provided by the embodiment of the present invention.

FIG. 3 is a cross-sectional view of the collet of the air-spindle mandrel structure provided by the embodiment of the present invention.

4 is a partial enlarged view of the DLC coating of the air-spindle mandrel structure provided by the embodiment of the present invention.

FIG. 5 is a top view of the locking nut of the air spindle mandrel structure provided by the embodiment of the present invention.

FIG. 6 is a front view of the locking nut of the air spindle mandrel structure provided by the embodiment of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the embodiments of the present invention, but should not be construed as a limitation of the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical" The orientation or positional relationship indicated by "straight", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more, unless otherwise expressly and specifically defined.

In the embodiments of the present utility model, unless otherwise explicitly specified and limited, terms such as "installation", "connected", "connected", "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a Detachable connection or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium, internal communication between two elements or interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

In an embodiment of the present invention, as shown in FIGS. 1 to 4 , the mandrel structure of the air spindle includes a mandrel 100 , a locking nut 200 , a disc spring 300 and a collet 400 . One end of the mandrel 100 is provided with a blind hole 101 , the other end is provided with a tapered hole 102 , a through hole 103 is provided between the tapered hole 102 and the blind hole 101 , and the edge of one end of the through hole 103 is connected to the edge of the small end of the tapered hole 102 . connected. A plurality of pairs of disc springs 300 are superposed and disposed in the blind hole 101 , and abut against the blind end of the blind hole 101 . The locking nut 200 is slidably fitted in the blind hole 101 . The collet 400 has a connecting end 401 and a clamping end 402 . A tool clamping hole 403 is provided in the clamping end of the collet 400 . The end of the connecting end 401 is provided with an external thread connected with the locking nut 200 , the clamping end 402 is a conical part matched with the tapered hole 102 ; There are two open grooves, and the open grooves pass through to the tool clamping hole 403 . The connecting end 401 of the collet 400 extends into the blind hole 102 from the end of the tapered hole 102, and is connected to the locking nut 200; the clamping end 402 cooperates with the quasi hole 102 to clamp and extend into the tool clamping hole Cutting tools in 403.

The surfaces of the collet 400 , the locking nut 200 and the disc spring 300 are all plated with a DLC coating 500 , and the surface of the DLC coating 500 is a pit surface. The DLC coating 500 on the collet 400 , the lock nut 200 and the disc spring 300 is uneven, thereby increasing the surface of the collet 400 , the lock nut 200 and the disc spring 300 . Hardness, increase the storage capacity of lubricating oil, improve the hardness of the surface of the chuck 400, the lock nut 200 and the disc spring 300, making them more suitable for the working requirements of sliding and wear resistance.

Further, referring to FIG. 4 , the surfaces of the collet 400 , the locking nut 200 and the disc spring 300 are all plated with a honeycomb-shaped DLC coating. In this embodiment, the honeycomb structure, which can store a certain amount of lubricating oil, occurs between the collet 400 and the lock nut 200, the inner wall of the blind hole 101 of the lock nut 200, and the lock nut 200 and the disc spring 300. When sliding relative to each other, the flat part of the DLC coating will not be stuck into the concave part of the other DLC coating 500, so that when the two are moving relative to each other, they can not only play a good lubricating effect, but also reduce the two The mutual contact area reduces friction, avoids wear and improves service life.

Further, referring to FIG. 6 , the outer circle of the locking nut 200 is provided with two ring grooves 201, and the two ring grooves 201 can increase the amount of lubricating oil stored, so as to ensure that the locking nut 200 can slide up and down more smoothly during operation. .

Further, referring to FIG. 5 and FIG. 6 , the locking nut 200 is further provided with an open elastic slit 202 around it, and a resilient hole 203 is provided at the closed end of the open elastic slit 202 . In this embodiment, the opening elastic slits 202 are arranged around the locking nut 202, so that the locking nut 200 can be spread out a certain distance, and the outer side of the locking nut 200 has a certain elasticity, so that the locking nut 200 It can elastically cooperate with the blind hole 101 to make the two contact more closely; thus, the vibration of the shaft core is more effectively reduced, and the machining accuracy is ensured.

Further, a plurality of open elastic slits 202 are evenly arranged, and the adjacent open elastic slits 202 are perpendicular to each other; The force is uniform, so as to ensure the accuracy of the workpiece machining by the tool.

Further, the collet 400 is further provided with an air hole 404 , one end of the air hole 404 communicates with the tool clamping hole 403 , and the other end passes through the collet 400 . The air hole 404 is used to communicate with the air supply device. In this embodiment, when the cutting tool needs to be replaced, the collet 400 is rotated to loosen the cutting tool, and then the air supply device blows air into the air hole 404, so as to facilitate the separation of the tool from the tool clamping hole 403, and can The heat inside the mandrel 100 is quickly taken out, the temperature of the mandrel 100 is reduced, and the installation accuracy of the next tool and the machining accuracy are ensured.

Further, for example to increase the strength of the connecting end 401 of the collet 400 to provide a better embodiment, please refer to FIG. 1 and FIG. 3 , a reinforcing shaft 405 is arranged in the air hole 404 ; the reinforcing shaft 405 is provided with The air hole 406 is connected. By adding a reinforcing shaft 405 in the air hole 404 , the connection strength of the collet 400 and the lock nut 200 is increased, and the torsion force of the collet 400 is increased;

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (7)

1. The air spindle mandrel structure comprises a mandrel (100), a locking nut (200), a disc spring (300) and a chuck (400); a blind hole (101) is formed in one end of the mandrel (100), a taper hole (102) is formed in the other end of the mandrel, and a through hole (103) is formed between the taper hole (102) and the blind hole (101); a plurality of pairs of disc springs (300) are oppositely overlapped and arranged in the blind holes (101); the locking nut (200) is in sliding fit in the blind hole (101); the clamping head (400) is provided with a connecting end (401) and a clamping end (402), and a cutter clamping hole (403) is formed in the clamping end (402) of the clamping head (400); the clamp is characterized in that the surfaces of the clamp head (400), the locking nut (200) and the disc spring (300) are all electroplated with DLC coatings, and the surfaces of the DLC coatings are pit surfaces.

2. The air spindle mandrel structure of claim 1, wherein: the surfaces of the clamping head (400), the locking nut (200) and the disc spring (300) are all electroplated with a DLC coating with a honeycomb-shaped surface.

3. The air spindle mandrel structure of claim 1, wherein: the excircle of lock nut (200) is equipped with two annular grooves (201), two annular groove (201) are used for storing lubricating oil.

4. An air spindle mandrel structure according to any one of claims 1 to 3, wherein: an opening elastic seam (202) is further arranged around the locking nut (200), and a closed end of the opening elastic seam (202) is provided with a rebound hole (203).

5. The air spindle mandrel structure of claim 4, wherein: the plurality of open elastic seams (202) are uniformly arranged, and the adjacent open elastic seams (202) are mutually perpendicular.

6. The air spindle mandrel structure of claim 1, wherein: an air hole (404) is further formed in the clamping head (400), one end of the air hole (404) is communicated with the cutter clamping hole (403), and the other end of the air hole (404) penetrates through the clamping head (400); the air hole (404) is used for being communicated with an air supply device.

7. The air spindle mandrel structure of claim 6, wherein: a reinforcing shaft (405) is further arranged in the air hole (404), and an air receiving hole (406) is arranged in the reinforcing shaft (405).

Images