Electric spindle with vacuum degree detection function

Abstract

A motorized spindle with a vacuum degree detection function comprises an air static pressure motorized spindle with a vacuum chuck, a vacuum generator for providing suction force for the vacuum chuck is arranged at the tail end of the air static pressure motorized spindle, and the vacuum generator is connected with the air static pressure motorized spindle through a vacuum air path. The vacuum air path is provided with a negative pressure sensor used for detecting the vacuum degree in the vacuum air path, the negative pressure sensor is provided with an output signal interface, and the output signal interface is used for sending a vacuum degree data signal detected by the negative pressure sensor, so that different vacuum degrees in the vacuum air path are adjusted according to metal sheets with different weights and thicknesses. In addition, the vacuum degree in the vacuum air path can be detected in real time, when the vacuum degree changes, the rotating shaft can be controlled to stop working, and machining errors caused by displacement of the metal sheet are prevented.

Description

Technical Field

[0001] The utility model relates to the field of electric spindles, in particular to an electric spindle with a vacuum degree detection function. Background Art

[0002] When machining metal sheets on a machine tool, in order to prevent the existing chuck from causing deformation when clamping the metal sheet, the applicant applied for a prior patent, the Chinese patent number: 201820927366.7, a vacuum suction cup electric spindle, which uses a vacuum suction cup to adsorb and clamp the metal sheet, so that the metal sheet can be adsorbed and clamped more smoothly. However, the applicant found during use that the vacuum suction cup electric spindle currently used does not have a vacuum degree detection function. The vacuum degree generated each time the metal sheet is adsorbed and clamped is the same, but the thickness and weight of metal sheets in different batches are different. Under the same vacuum degree of adsorption and clamping, thicker and heavier metal sheets are prone to displacement on the vacuum suction cup under the high-speed rotation of the shaft, resulting in deviations in its processing accuracy. If the adsorption strength of the suction cup is increased, it is easy to cause deformation of the adsorption and clamping position. Utility Model Content

[0003] The utility model aims to provide an electric spindle with a vacuum degree detection function to detect the vacuum degree during adsorption and clamping, so as to adopt adsorption strengths of different vacuum degrees according to metal sheets of different weights and thicknesses.

[0004] In order to solve the above technical problems, the specific solution adopted by the utility model is:

[0005] An electric spindle with a vacuum degree detection function comprises an air-static pressure electric spindle with a vacuum suction cup, wherein the tail end of the air-static pressure electric spindle is provided with a vacuum generator for providing suction for the vacuum suction cup, the vacuum generator is connected to the air-static pressure electric spindle via a vacuum air path, the vacuum air path is provided with a negative pressure sensor for detecting the vacuum degree inside the vacuum air path, the negative pressure sensor is provided with an output signal interface, and the output signal interface is used to send a vacuum degree data signal detected by the negative pressure sensor.

[0006] The pneumatic static pressure electric spindle comprises a spindle housing, inside of which a rotating shaft driven by a motor is arranged, and the rotating shaft is used to drive a vacuum suction cup.

[0007] A vacuum channel is arranged inside the rotating shaft, and a vacuum air path is connected with the vacuum channel along the tail of the main shaft housing.

[0008] The motor is located in the spindle housing at one end far from the vacuum suction cup.

[0009] The negative pressure sensor and the vacuum generator are located outside the spindle housing.

[0010] The vacuum suction cup is mounted on the spindle housing through a vacuum flange for driving the rotating shaft.

[0011] The power line of the motor extends along the top of the spindle housing and is electrically connected to an external power source.

[0012] The negative pressure sensor is located between the vacuum generator and the pneumatic static pressure electric spindle.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] A vacuum generator is arranged at the tail end of the pneumatic electric spindle, and the vacuum generator is connected to the vacuum channel of the rotating shaft through a vacuum air path. The vacuum generator is used to draw a vacuum to control the vacuum suction cup to adsorb the workpiece. A negative pressure sensor is arranged in the vacuum air path to detect the vacuum degree inside the vacuum air path when drawing a vacuum, so as to adjust the vacuum degree in the vacuum air path according to the metal sheets of different weights and thicknesses. When clamping thicker metal sheets, a larger vacuum degree can be used to adsorb them to prevent displacement during high-speed rotation. Appropriate vacuum degree can be used to adsorb and clamp thinner metal sheets to prevent deformation of the metal sheets.

[0015] The vacuum degree inside the vacuum air circuit can also be detected in real time through the negative pressure sensor. When the vacuum degree changes during the processing, the operator can stop the rotating shaft in time to prevent processing errors caused by displacement of the metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Reference numerals: vacuum suction cup 1 ; vacuum flange 2 ; vacuum channel 3 ; rotating shaft 4 ; spindle housing 5 ; motor 6 ; vacuum air path 8 ; negative pressure sensor 9 ; output signal interface 10 ; vacuum generator 11 . DETAILED DESCRIPTION

[0018] like Figure 1As shown, an electric spindle with a vacuum degree detection function includes an air-static pressure electric spindle, which includes a spindle housing 5, a rotating shaft 4 and a motor 6 are arranged inside the spindle housing 5, the rotating shaft 4 is driven by the motor 6, one end of the rotating shaft 4 extends to the outside of the spindle housing 5, and a vacuum suction cup 1 is arranged on the end of the rotating shaft 4 extending to the outside of the spindle housing 5, and the vacuum suction cup 1 is used to adsorb the workpiece. A vacuum channel 3 is arranged inside the rotating shaft 4, and a vacuum air path 8 is arranged at the tail of the spindle housing 5, the vacuum air path 8 is connected with the vacuum channel 3, and a vacuum generator 11 is arranged on the vacuum air path 8, and the vacuum generator 11 is used to vacuum the vacuum suction cup 1 through the vacuum air path 8 and the vacuum channel 3. The vacuum suction cup 1 adsorbs the workpiece by vacuuming through the vacuum generator 11, and the vacuum suction cup 1 is fixed to the spindle housing 5 through the vacuum flange 2 for driving the rotating shaft 4. A negative pressure sensor 9 is also arranged on the vacuum air path 8, and the negative pressure sensor 9 is located between the vacuum generator 11 and the air-static pressure electric spindle. The negative pressure sensor 9 is used to detect the vacuum degree in the vacuum air circuit 8. When the vacuum degree in the vacuum air circuit 8 is lower than the set value, the negative pressure sensor 9 sends a signal to the controller through the output signal interface 10. The controller refers to the control system of the machining center. When the control system receives the signal, it will control the pneumatic hydrostatic electric spindle to stop working. The operator can select the vacuum degree used during adsorption according to the change in vacuum degree.

[0019] The motor 6 is located in the spindle housing 5 . The motor 6 is located on one end of the rotating shaft 4 which is farther from the vacuum suction cup 1 . The rotor of the motor 6 is located on the outside of the rotating shaft 4 . The rotating shaft 4 is driven to rotate by the rotor of the motor 6 .

[0020] The method of using the utility model is briefly described as follows:

[0021] The vacuum channel 3 is evacuated by the vacuum generator 11, and the vacuum suction cup 1 can adsorb and fix the workpiece. During the operation of the rotating shaft 4, the rotating shaft 4 drives the vacuum suction cup 1 to rotate the workpiece for processing. The negative pressure sensor 9 detects the vacuum degree in the vacuum air path 8 and the vacuum channel 3 in real time. When the negative pressure sensor 9 detects that the vacuum degree is lower than the set value during operation, the negative pressure sensor 9 sends a signal to the control system of the machining center through the output signal interface 10, so that the operator can control the rotating shaft 4 to stop working or increase the work intensity of the vacuum generator 11.

Claims

1. An electric spindle with a vacuum degree detection function, comprising an air static pressure electric spindle with a vacuum suction cup (1), characterized in that: The tail end of the pneumatic static pressure electric spindle is provided with a vacuum generator (11) for providing suction force for the vacuum suction cup (1); the vacuum generator (11) is connected to the pneumatic static pressure electric spindle via a vacuum air path (8); the vacuum air path (8) is provided with a negative pressure sensor (9) for detecting the vacuum degree inside the vacuum air path (8); the negative pressure sensor (9) is provided with an output signal interface (10); the output signal interface (10) is used to send a vacuum degree data signal detected by the negative pressure sensor (9).

2. The electric spindle with vacuum detection function according to claim 1 is characterized in that: The pneumatic static pressure electric spindle comprises a spindle housing (5), a rotating shaft (4) driven by a motor (6) is arranged inside the spindle housing (5), and the rotating shaft (4) is used to drive the vacuum suction cup (1).

3. The electric spindle with vacuum detection function according to claim 2 is characterized in that: A vacuum channel (3) connected to the vacuum suction cup (1) is provided inside the rotating shaft (4), and a vacuum air path (8) is connected to the vacuum channel (3) along the rear of the spindle housing (5).

4. The electric spindle with vacuum detection function according to claim 2 is characterized in that: The negative pressure sensor (9) and the vacuum generator (11) are located outside the spindle housing (5).

5. The electric spindle with vacuum detection function according to claim 2 is characterized in that: The vacuum suction cup (1) is mounted on the spindle housing (5) via a vacuum flange (2) for driving the rotating shaft (4).

6. The electric spindle with vacuum detection function according to claim 2 is characterized in that: The power line of the motor (6) extends along the top of the spindle housing (5) and is electrically connected to an external power source.

7. The electric spindle with vacuum detection function according to claim 1 is characterized in that: The negative pressure sensor (9) is located between the vacuum generator (11) and the pneumatic static pressure electric spindle.

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