Electric spindle for ultrasonic machining

Abstract

The utility model discloses an electric main shaft for ultrasonic machining, which comprises a shaft casing, a motor is arranged in the shaft casing, a shaft core which penetrates through the motor and is driven by the motor is further rotatably mounted in the shaft casing, and one end of the shaft core is provided with a cutter handle mounting hole for mounting an ultrasonic machining cutter. And a sliding grabbing and releasing conductive mechanism for grabbing, releasing and conducting the ultrasonic machining cutter is arranged on the shaft core at the upstream of the cutter handle mounting hole. According to the invention, grabbing, releasing and electric conduction of an ultrasonic machining cutter can be realized, ultrasonic machining work can be carried out, and meanwhile, grabbing and releasing of a conventional machining cutter can be carried out, and related machining work can be carried out, so that the purpose of use universality is achieved, and addition of a specific mounting structure is avoided; the complex degree of a machine tool structure is increased, and the machining efficiency is influenced by repeated disassembly, assembly and debugging.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic processing instruments, and in particular relates to an electric spindle used for ultrasonic processing. Background Art

[0002] Currently, the cutting tools used in machining operations are conventional machining tools (turning tools, milling cutters, drills, boring tools, planing tools, etc.), and the mounting structure for these tools is also common on machine tools. However, ultrasonic machining requires a specific mounting structure to secure the ultrasonic machining tools to the machine tool before machining can begin. This approach not only reduces versatility but also increases the structural complexity of the machine tool. Furthermore, repeated disassembly and commissioning between conventional and ultrasonic machining operations is time-consuming and labor-intensive, impacting machining efficiency. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides an electric spindle for ultrasonic machining to solve the problems of poor versatility, increased complexity of machine tool structure and affected machining efficiency.

[0004] The technical solution provided by the utility model is: an electric spindle for ultrasonic machining, including a shaft housing, a motor is provided in the shaft housing, a shaft core is rotatably installed in the shaft housing, which passes through the motor and is driven by the motor, one end of the shaft core is provided with a tool holder mounting hole for mounting an ultrasonic machining tool, and a sliding grasping and releasing conductive mechanism for grasping, releasing and conducting the ultrasonic machining tool is provided on the shaft core upstream of the tool holder mounting hole.

[0005] As an improvement, the sliding grasping and releasing conductive mechanism includes a mounting seat provided on the shaft housing, a broaching oil cylinder is installed on the mounting seat, a driving end of the broaching oil cylinder is connected to a pull rod passing through the shaft core and extending toward the tool handle mounting hole, and a pull claw is hingedly connected to one end of the pull rod near the tool handle mounting hole;

[0006] It also includes a broach disc spring sleeved on the pull rod, wherein the broach disc spring is positioned between the outer wall of the pull rod and the inner wall of the shaft core;

[0007] It also includes a stator seat arranged on the mounting seat and a slip ring rotor arranged on the shaft core, the stator seat is mounted with a slip ring stator connected to the positive pole of the power supply, one end of the slip ring rotor is provided with a stator contact abutting against the slip ring stator, and the other end of the slip ring rotor is provided with a bearing contact; the shaft core is also provided with a conductive bearing abutting against the bearing contact, the conductive bearing is provided with an insulated positive wire, the positive wire passes through the axial direction of the pull rod and extends toward the tool handle mounting hole.

[0008] As a further improvement, a connecting joint is threadedly installed on one end of the pull rod close to the shank mounting hole, a shank contact is provided on the connecting joint, and the positive wire is arranged on the connecting joint and connected to the shank contact.

[0009] As a further improvement, a spirally arranged cooling channel is provided on the outer wall of the shaft housing.

[0010] By adopting the above-mentioned technical solution, the electric spindle for ultrasonic machining provided by the present invention has the following beneficial effects:

[0011] Since the electric spindle for ultrasonic machining includes a shaft housing, a motor is provided in the shaft housing, and a shaft core that passes through the motor and is driven by the motor is rotatably installed in the shaft housing, one end of the shaft core is provided with a tool holder mounting hole for installing an ultrasonic machining tool, and the shaft core located upstream of the tool holder mounting hole is provided with a sliding grasping and releasing conductive mechanism for grasping, releasing and conducting the ultrasonic machining tool. Based on the above structure, when the electric spindle for ultrasonic machining is used, the electric spindle is first installed on the machine tool, and then the ultrasonic machining tool is installed in the tool holder mounting hole. After that, the ultrasonic machining tool is grasped and fixed by the sliding grasping and releasing conductive mechanism. At this time, the ultrasonic machining tool is electrically connected to the sliding grasping and releasing conductive mechanism, and the ultrasonic transducer in the ultrasonic machining is operated. When ultrasonic machining is performed, the motor drives the shaft core to rotate, and the shaft core drives the sliding grasping and releasing conductive mechanism and the ultrasonic machining tool grasped by it to rotate synchronously, thereby enabling the ultrasonic machining tool to complete ultrasonic machining.

[0012] To sum up, the electric spindle used for ultrasonic machining can realize the grasping, releasing and conductive operation of ultrasonic machining tools, and perform ultrasonic machining work. At the same time, it can also grasp and release conventional machining tools and perform related machining work, achieving the purpose of universal use, avoiding the addition of specific installation structures, resulting in increased complexity of the machine tool structure, and repeated disassembly and debugging, thereby affecting machining efficiency.

[0013] The sliding grasping and releasing conductive mechanism includes a mounting seat provided on the shaft housing, a broaching cylinder is installed on the mounting seat, a driving end of the broaching cylinder is connected to a pull rod passing through the shaft core and extending toward the tool handle mounting hole, and a pull claw is hinged at one end of the pull rod close to the tool handle mounting hole; it also includes a broaching disc spring sleeved on the pull rod, and the broaching disc spring is positioned between the outer wall of the pull rod and the inner wall of the shaft core; it also includes a stator seat provided on the mounting seat and a slip ring rotor provided on the shaft core, a slip ring stator connected to the positive pole of the power supply is installed on the stator seat, a stator contact that is abutted against the slip ring stator is provided at one end of the slip ring rotor, and a bearing contact is provided at the other end of the slip ring rotor; a conductive bearing that is abutted against the bearing contact is also provided on the shaft core, and an insulated positive wire is provided on the conductive bearing, and the positive wire passes through the axial direction of the pull rod and extends toward the tool handle mounting hole. The hole extends in the direction of the hole. Based on the structure of the above-mentioned sliding grasping and releasing conductive mechanism, when grasping and fixing the machining tool (including ultrasonic machining tool), the broaching cylinder drives the draw rod to work, and synchronously drives the draw claw to grasp the tool located in the tool holder mounting hole through the draw rod. If the tool is an ultrasonic machining tool, the positive pole is connected to the ultrasonic machining tool through the conductive structure of the slip ring stator, stator contact, slip ring rotor, bearing contact, conductive bearing and positive wire, and the negative pole connection is completed through the electric spindle body which is itself charged. At the same time, the cooperation of the slip ring rotor, slip ring stator and conductive bearing does not affect the rotation of the shaft core and the normal conductive work; on the contrary, the tool is released by the tension generated by the broaching disc spring itself, so that the tool can be quickly replaced. The structure is simple and the practicality and versatility are strong.

[0014] Since a connecting joint is threadedly installed on one end of the pull rod close to the tool handle mounting hole, a tool handle contact is provided on the connecting joint, and the positive wire is set on the connecting joint and connected to the tool handle contact, so that the connection joint and the tool handle contact cooperate to ensure that the ultrasonic machining tool is always in a conductive state, and the connection and fixing effect of the positive wire is good. At the same time, if the tool handle contact is worn, it is easy to replace.

[0015] Since a spiral cooling channel is provided on the outer wall of the shaft housing, the contact area of the cooling medium is increased through the cooling channel, which can effectively improve the cooling effect and efficiency of the shaft housing, provide a guarantee for normal ultrasonic machining, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 yes Figure 1 A magnified view of middle A;

[0019] Figure 3 yes Figure 1 Enlarged view of middle B;

[0020] In the figure, 1-shaft housing; 101-cooling channel; 2-motor; 3-shaft core; 301-tool holder mounting hole; 302-blocking plate; 303-slip ring rotor; 304-stator contact; 305-bearing contact; 306-conductive bearing; 307-conductor; 4-ultrasonic machining tool; 401-electrode; 5-sliding grasping and releasing conductive mechanism; 501-mounting seat; 502-broaching cylinder; 503-pull rod; 504-pull claw; 505-broaching disc spring; 506-stator seat; 507-slip ring stator; 6-positive wire; 7-connecting connector; 701-tool holder contact. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown together, an electric spindle for ultrasonic machining includes a shaft housing 1, in which a motor 2 is provided, and a shaft core 3 is rotatably installed in the shaft housing 1, which passes through the motor 2 and is driven by the motor 2. One end of the shaft core 3 is provided with a tool holder mounting hole 301 for mounting an ultrasonic machining tool 4, and a sliding grasping and releasing conductive mechanism 5 for grasping, releasing and conducting the ultrasonic machining tool 4 is provided on the shaft core 3 upstream of the tool holder mounting hole 301.

[0023] The sliding grasping and releasing conductive mechanism 5 includes a mounting seat 501 arranged on the shaft housing 1, a broaching oil cylinder 502 is installed on the mounting seat 501, the driving end of the broaching oil cylinder 502 is connected to a pull rod 503 passing through the shaft core 3 and extending toward the tool handle mounting hole 301, and the pull rod 503 is hinged with a pull claw 504 at one end close to the tool handle mounting hole 301; it also includes a broaching disc spring 505 mounted on the pull rod 503, and the broaching disc spring 505 is positioned between the outer wall of the pull rod 503 and the inner wall of the shaft core 3. In this solution, the specific positioning method is: a protruding step portion is provided on the outer wall of the pull rod 503, and a baffle 302 is provided on the inner wall of the shaft core 3. The pull rod 503 passes through the baffle 302, and the two ends of the broaching disc spring 505 respectively abut against The step portion and the baffle 302 are provided; it also includes a stator seat 506 arranged on the mounting seat 501 and a slip ring rotor 303 arranged on the shaft core 3, the stator seat 506 is provided with a slip ring stator 507 connected to the positive pole of the power supply, one end of the slip ring rotor 303 is provided with a stator contact 304 that abuts the slip ring stator 507, and the other end of the slip ring rotor 303 is provided with a bearing contact 305, and a conductor 307 arranged on the slip ring rotor 303 is provided between the stator contact 304 and the bearing contact 305; the shaft core 3 is also provided with a conductive bearing 306 that abuts the bearing contact 305, and the conductive bearing 306 is provided with an insulated positive wire 6, which passes through the axial direction of the pull rod 503 and extends toward the shank mounting hole 301.

[0024] Preferably, a connecting joint 7 is threadedly installed on one end of the pull rod 503 near the tool handle mounting hole 301, and a tool handle contact 701 is provided on the connecting joint 7. The positive wire 6 is set on the connecting joint 7 and connected to the tool handle contact 701. When in the ultrasonic machining state, the tool handle contact 701 is against the electrode 401 at the end of the ultrasonic machining tool 4.

[0025] In this solution, a spiral cooling channel 101 is provided on the outer wall of the shaft housing 1 .

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or part of them can be modified.

[0027] Some or all of the technical features may be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An electric spindle for ultrasonic machining, comprising a shaft housing, a motor disposed in the shaft housing, and a shaft core rotatably mounted in the shaft housing and passing through the motor and driven by the motor, characterized in that: A tool holder mounting hole for mounting an ultrasonic machining tool is provided at one end of the shaft core, and a sliding grasping and releasing conductive mechanism for grasping, releasing and conducting the ultrasonic machining tool is provided on the shaft core upstream of the tool holder mounting hole; The sliding grasping and releasing conductive mechanism includes a mounting seat provided on the shaft housing, a broaching oil cylinder is installed on the mounting seat, a driving end of the broaching oil cylinder is connected to a pull rod passing through the shaft core and extending toward the tool handle mounting hole, and a pull claw is hingedly connected to one end of the pull rod near the tool handle mounting hole; It also includes a broach disc spring sleeved on the pull rod, wherein the broach disc spring is positioned between the outer wall of the pull rod and the inner wall of the shaft core; It also includes a stator seat arranged on the mounting seat and a slip ring rotor arranged on the shaft core, the stator seat is mounted with a slip ring stator connected to the positive pole of the power supply, one end of the slip ring rotor is provided with a stator contact abutting against the slip ring stator, and the other end of the slip ring rotor is provided with a bearing contact; the shaft core is also provided with a conductive bearing abutting against the bearing contact, the conductive bearing is provided with an insulated positive wire, the positive wire passes through the axial direction of the pull rod and extends toward the tool handle mounting hole.

2. The electric spindle for ultrasonic machining according to claim 1, characterized in that: A connecting joint is threadedly mounted on one end of the pull rod close to the tool handle mounting hole, a tool handle contact is provided on the connecting joint, and the positive lead is arranged on the connecting joint and connected to the tool handle contact.

3. The electric spindle for ultrasonic machining according to claim 1 or 2, characterized in that: A spiral cooling channel is provided on the outer wall of the shaft housing.

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