Electrical spindle shared by gas-liquid pipeline

Abstract

The utility model provides a kind of gas-liquid pipeline shared electric spindle, including shell, mandrel, linear motor for driving mandrel, coupling, pullout tool spindle connected with mandrel by coupling and pullout tool shaft head fixed in the end of shell, the inside of pullout tool shaft head is equipped with gas-liquid multiplexing channel, and gas-liquid injection port located in the end of gas-liquid multiplexing channel is equipped in the installation end surface of pullout tool shaft head;It further includes gas-liquid pipeline sharing multiplexing device, and multiplexing device includes: the gas inlet pipe connected with external gas source, the liquid inlet pipe connected with external liquid source, the multiplexing pipe connected with gas-liquid multiplexing channel, the first electromagnetic valve and the first check valve connected between gas inlet pipe and multiplexing pipe, the second electromagnetic valve and the second check valve connected between liquid inlet pipe and multiplexing pipe, the controller for controlling the work of first electromagnetic valve and second electromagnetic valve, and multiplexing pipe is arranged in shell.In electric spindle, gas inlet pipe and liquid inlet pipe are designed using shared channel multiplexing, which is simple and compact in structure and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment, and in particular to an electric spindle with shared gas and liquid pipelines. Background Technology

[0002] An electric spindle is a component in CNC machine tools that integrates the machine tool spindle and motor. It is used to drive the rotation of the workpiece or tool and is widely used in rotary machine tools such as lathes and milling machines. During the cutting process, the spindle needs to spray cutting fluid or gas onto the cutting area to cool it down and remove machining debris, which helps improve the machining accuracy of the spindle. Therefore, independent parallel air and fluid pipes are usually installed inside the spindle, occupying a considerable amount of space. This is not conducive to achieving spindle miniaturization and high speed, and the fluid and air pipes can easily become disorganized within the spindle, making maintenance or replacement difficult for users. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art by proposing an electric spindle with shared gas and liquid pipes. The air inlet pipe and liquid inlet pipe are designed to share a channel for reuse within the electric spindle, resulting in a simple and compact structure with low maintenance costs.

[0004] This utility model proposes an electric spindle with shared gas and liquid pipelines, including a housing, a spindle, a linear motor for driving the spindle, a coupling, a broach spindle fixedly connected to the spindle via the coupling, and a broach head fixed to the end of the housing. The broach head has a gas-liquid reuse channel inside, and a gas-liquid nozzle is provided at the end of the gas-liquid reuse channel on the mounting end face of the broach head. It also includes a gas-liquid pipeline sharing and reuse device, which includes: an air inlet pipe connected to an external gas source, a liquid inlet pipe connected to an external liquid source, a reuse pipe connected to the gas-liquid reuse channel, a first solenoid valve and a first check valve connected in series between the air inlet pipe and the reuse pipe, a second solenoid valve and a second check valve connected in series between the liquid inlet pipe and the reuse pipe, and a controller for controlling the operation of the first solenoid valve and the second solenoid valve. The reuse pipe is disposed inside the housing.

[0005] In some preferred embodiments, a strip groove is provided along the length of the outer casing, and the reusable tube is disposed within the strip groove.

[0006] In some preferred embodiments, a cover plate is provided on the outer side of the strip groove; the cover plate comprises multiple pieces, which are segmented and assembled into a whole to completely cover the strip groove.

[0007] In some preferred embodiments, the first solenoid valve, the first check valve, the second solenoid valve, and the second check valve are disposed outside the housing.

[0008] In some preferred embodiments, the first solenoid valve, the first check valve, the second solenoid valve, and the second check valve are located at the second end of the strip groove away from the cutter shaft head, allowing the air inlet pipe and the liquid inlet pipe to extend from the outside of the housing into the second end of the strip groove.

[0009] In some preferred embodiments, a pipe joint connected to the gas-liquid reuse channel is also provided on the outer casing. The pipe joint is fixed at the first end of the strip groove near the cutter shaft head, and the end of the gas-liquid reuse channel is detachably connected to the gas-liquid reuse channel through the pipe joint.

[0010] In some preferred embodiments, the linear motor includes a motor rotor fixed on a spindle and a motor stator fixed inside a housing, the motor stator being coaxially arranged with the motor rotor.

[0011] In some preferred embodiments, the mounting end face of the broach head is provided with a pull claw.

[0012] In some preferred embodiments, the controller is a microcontroller (MCU), a programmable logic controller (PLC), or a programmable gate array (FPGA).

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By combining the air inlet and liquid inlet pipes into a single, shared pipe within the spindle's housing, and with only this shared pipe located inside the housing, the separate space occupied by the air and liquid inlet pipes is avoided. This simplifies the overall structure of the spindle, allowing for a smaller, more compact design and reducing its overall weight to better meet the demands of high-response, high-speed motion. Furthermore, this solution is highly versatile, adaptable to various gas and liquid outputs, meeting the machining needs of different parts in practical engineering applications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the electric spindle.

[0016] Figure 2 This is a partial 3D structural diagram of the electric spindle without showing part of the cover plate.

[0017] Figure 3 This is a schematic diagram of part of the internal structure of the electric spindle.

[0018] Figure 4 This is one of the three-dimensional structural diagrams of the broach spindle head.

[0019] Figure 5 This is the second schematic diagram of the three-dimensional structure of the broach spindle head.

[0020] Figure 6 This is a schematic diagram of the principle of a gas-liquid pipeline sharing and reuse device. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this application to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0022] like Figures 1-5 As shown, the electric spindle includes a housing 31, a spindle 1, a linear motor for driving the spindle 1, a coupling 4, a broach spindle 5 fixedly connected to the spindle 1 via the coupling 4, and a broach head 6 fixed to the end of the housing 31. The broach spindle 5 extends to the broach head 6, which is used to tighten the tool holder of the machining tool so that the tool tip is fixedly connected to the broach spindle 5.

[0023] The linear motor includes a motor rotor 21 fixed on a spindle 1 and a motor stator 22 fixed inside a housing 21. The motor stator 22 is coaxially arranged with the motor rotor 21, and the magnetic field generated by the motor stator 22 drives the motor rotor 21 to rotate synchronously with the spindle 1.

[0024] The spindle 1 is directly driven by a linear motor, eliminating the complex intermediate transmission links. Compared with traditional belt-driven spindles, electric spindles eliminate the complex intermediate transmission links and have advantages such as wide speed range, low vibration and noise, and quick start and stop. Therefore, the use of electric spindles can significantly improve the machining accuracy and surface quality of parts.

[0025] One end of the spindle 1 is connected to the broach spindle 5 via a coupling 4. The spindle 1 drives the broach spindle 5 to rotate synchronously, thereby driving the cutting tool head fixed to the end of the broach spindle 5 via the broach head 6 to rotate, and using the cutting tool to perform cutting and other machining operations on the parts.

[0026] The broach spindle head 6 has a puller 64 on its mounting end face, which is used to tighten and assemble the tool holder of the cutting tool. The connecting end face of the broach spindle head 6 relative to the end of the housing 31 has multiple positioning grooves 61, and positioning blocks 7 are provided in the positioning grooves 61. The positioning blocks 7 keep the broach spindle head 6 fixedly connected to the housing 31, so that the broach spindle head 6 will not be affected by the rotation of the cutting tool head and will rotate with the broach spindle 5.

[0027] During the machining process using an electric spindle, compressed gas or cutting fluid needs to be sprayed for chip removal, cleaning, cooling, and lubrication. Therefore, the broach head 6 is equipped with a gas-liquid reuse channel 62, and a gas-liquid nozzle 63 is located at the end of the gas-liquid reuse channel 62 on the mounting end face of the broach head 6, allowing compressed gas or cutting fluid to be sprayed out from the gas-liquid nozzle 63 through the gas-liquid reuse channel 62.

[0028] A gas-liquid pipeline sharing and reuse device is provided inside the housing 21. The gas pipe and liquid pipe adopt a shared channel reuse design to reduce the number of pipes in the electric spindle. This makes the structure of the electric spindle simpler and more compact, and reduces the difficulty of pipe maintenance during use.

[0029] Specifically, the gas-liquid pipeline sharing and reuse device includes: an air inlet pipe 91 connected to an external gas source, a liquid inlet pipe 92 connected to an external liquid source, a reuse pipe 93 connected to the gas-liquid reuse channel 62, a first solenoid valve and a first check valve connected in series between the air inlet pipe 91 and the reuse pipe 93, a second solenoid valve and a second check valve connected in series between the liquid inlet pipe 92 and the reuse pipe 93, and a controller for controlling the operation of the first solenoid valve and the second solenoid valve.

[0030] That is, the input end of the first solenoid valve is connected to the air inlet pipe 91, and the output end of the first solenoid valve is connected to the input end of the first check valve; the input end of the second solenoid valve is connected to the liquid inlet pipe 92, and the output end of the second solenoid valve is connected to the input end of the second check valve; the output ends of the first check valve and the second check valve are both connected to the multiplexing pipe 93.

[0031] The controller is generally implemented using control chips such as microcontrollers (MCU), programmable logic controllers (PLC), or programmable gate arrays (FPGA). This is existing technology and will not be described in detail here.

[0032] When the gas or liquid nozzle 63 is not in operation or is not required to eject gas or liquid during operation, both the first and second solenoid valves are closed. If gas needs to be ejected from the gas or liquid nozzle 63, the first solenoid valve is opened and the second solenoid valve is closed. Compressed gas from the gas source is ejected from the gas or liquid nozzle 63 sequentially through the first solenoid valve, the first check valve, the multiplexing pipe 93, and the gas-liquid multiplexing channel 62. The first check valve prevents the gas in the multiplexing pipe 93 from flowing back into the second solenoid valve. If liquid needs to be ejected from the gas or liquid nozzle 63, the first solenoid valve is closed and the second solenoid valve is opened. Cutting fluid from an external liquid source is ejected from the gas or liquid nozzle 63 sequentially through the second solenoid valve, the second check valve, the multiplexing pipe 93, and the gas-liquid multiplexing channel 62. The first check valve prevents the liquid in the multiplexing pipe 93 from flowing back into the first solenoid valve.

[0033] A strip groove 311 is provided along the length of the outer casing 31, and the reuse tube 93 is disposed in the strip groove 311. A cover plate 32 is provided on the outer side of the strip groove 311. The reuse tube 93 can be exposed by removing the cover plate 32 for easy inspection and maintenance.

[0034] The cover plate 32 comprises multiple pieces, which are assembled in segments to completely cover the strip groove 311. This allows for the partial opening of the cover plate 32 during inspection and maintenance, thus reducing the workload of inspection and maintenance.

[0035] To ensure a secure connection between the end of the reuse tube 93 and the gas-liquid reuse channel 62, preventing loosening under air or hydraulic pressure, a pipe connector 99 connected to the gas-liquid reuse channel 62 is provided on the outer casing 32. The pipe connector 99 is fixed to the first end of the strip groove 311 near the cutter head 6, allowing the end of the gas-liquid reuse channel 62 to maintain a secure and reliable detachable connection with the gas-liquid reuse channel 62 through the pipe connector 99.

[0036] The first solenoid valve, the first check valve, the second solenoid valve, and the second check valve are located outside the housing 31, so that only the reuse pipe 93 is located within the slot 311 of the housing 31. Alternatively, the first solenoid valve, the first check valve, the second solenoid valve, and the second check valve can be located at the second end of the slot 311 away from the cutter head 6, allowing the air inlet pipe 91 and the liquid inlet pipe 92 to extend from outside the housing 31 into the second end of the slot 311. In this case, the air inlet pipe 91 and the liquid inlet pipe 92 will not occupy much of the limited space within the slot 311.

[0037] In this way, the air inlet pipe 91 and the liquid inlet pipe 92 converge into a single reuse pipe 93 within the strip groove 311. Only the reuse pipe 93 is located inside the housing 31 of the electric spindle, which avoids the air inlet pipe 91 and the liquid inlet pipe 92 occupying the limited space inside the housing 31. This helps to simplify the overall structure of the electric spindle, enabling a miniaturized and compact design, and reducing the overall weight of the electric spindle to better meet the high-response, high-speed motion characteristics.

[0038] In addition, this solution is highly versatile and can be adapted to the output of various gases and liquids, meeting the processing needs of different parts in actual engineering.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric spindle for use with gas and liquid pipelines, comprising a housing, a spindle, a linear motor for driving the spindle, a coupling, a broach spindle fixedly connected to the spindle via the coupling, and a broach head fixed to the end of the housing, characterized in that: The inside of the broach head is provided with a gas-liquid reuse channel, and a gas-liquid nozzle is provided at the end of the gas-liquid reuse channel on the mounting end face of the broach head; It also includes a gas-liquid pipeline sharing and reuse device, which includes: an air inlet pipe connected to an external gas source, a liquid inlet pipe connected to an external liquid source, a reuse pipe connected to a gas-liquid reuse channel, a first solenoid valve and a first check valve connected in series between the air inlet pipe and the reuse pipe, a second solenoid valve and a second check valve connected in series between the liquid inlet pipe and the reuse pipe, and a controller for controlling the operation of the first solenoid valve and the second solenoid valve. The reuse pipe is installed inside the housing.

2. The electric spindle according to claim 1, characterized in that: A strip-shaped groove is provided along the length of the outer shell, and the reusable tube is installed in the strip-shaped groove.

3. The electric spindle according to claim 2, characterized in that: A cover plate is provided on the outer side of the strip groove; the cover plate consists of multiple pieces, which are assembled in segments to completely cover the strip groove.

4. The electric spindle according to claim 2, characterized in that: The first solenoid valve, the first check valve, the second solenoid valve, and the second check valve are disposed outside the housing.

5. The electric spindle according to claim 2, characterized in that: The first solenoid valve, the first check valve, the second solenoid valve, and the second check valve are located at the second end of the strip groove, away from the cutter shaft head, allowing the air inlet pipe and the liquid inlet pipe to extend from the outside of the housing into the second end of the strip groove.

6. The electric spindle according to claim 2, characterized in that: The outer casing is also equipped with a pipe joint connected to the gas-liquid reuse channel. The pipe joint is fixed at the first end of the strip groove near the cutter shaft head. The end of the gas-liquid reuse channel is detachably connected to the gas-liquid reuse channel through the pipe joint.

7. The electric spindle according to claim 1, characterized in that: A linear motor includes a motor rotor fixed on a spindle and a motor stator fixed inside a housing, with the motor stator and motor rotor arranged coaxially.

8. The electric spindle according to claim 1, characterized in that: The mounting end face of the broach spindle head is equipped with a pull claw.

9. The electric spindle according to claim 1, characterized in that: The controller uses a single-chip microcomputer (MCU), a programmable logic controller (PLC), or a programmable gate array (FPGA).

Images