A boring tool with air pressure support and a vibration-eliminating method

Abstract

The present invention discloses a boring tool with air pressure support and a vibration elimination method, which are suitable for use in the field of metal cutting processing technology. A jet vibration elimination device for suppressing the vibration of the boring tool body is provided on the boring tool body, and the jet vibration elimination device includes multiple high-pressure air holes arranged on the side wall of the boring tool body and multiple air passages arranged in the boring tool body and connected to the high-pressure air holes, and the air passages communicate the high-pressure air holes with the rear end of the boring tool body. The air distribution valve is used to adjust the air jet volume of each air passage respectively, so as to provide support to the boring tool body. The opening and closing of the multiple air passages and the adjustment of the gas flow are individually controlled by the air distribution valve, so as to eliminate the vibration generated by the boring tool body when processing the workpiece being cut. It has a simple structure, and the reaction force generated by the air jet is used to provide auxiliary support to the boring bar, thereby improving the support stiffness of the boring bar, which is beneficial to reducing the vibration in the processing of parts and improving the quality of the processed surface.

Description

Technical Field

[0001] The invention relates to a boring tool and a de-chattering method, in particular to a boring tool with air pressure support and a de-chattering method which are suitable for the technical field of metal cutting processing. Background Art

[0002] In mechanical processing, boring tools are usually used for hole processing. When boring deep holes, the boring tool has a long overhang and low rigidity, which is prone to chatter instability, affecting the surface quality of the processing. In order to suppress chatter, existing boring tools generally hollow out the inside of the boring tool and set a vibration absorber inside. This method requires removing a large amount of material inside the boring tool, greatly weakening the rigidity of the boring bar. In addition, the vibration absorber has a complex structure and is not easy to install and adjust. Summary of the invention

[0003] Technical problem: To overcome the shortcomings of the existing technology, a boring tool and a de-vibration method with air pressure support are provided, which have simple structure, good use effect and low production cost.

[0004] Technical solution: To achieve the above technical purpose, the boring tool with air pressure support of the present invention includes a boring tool body, and the boring tool body is provided with a jet-type vibration-absorbing device for suppressing the vibration of the boring tool body.

[0005] Furthermore, the jet-type vibration isolation device includes multiple high-pressure air holes arranged on the side wall of the boring cutter body and multiple air passages arranged inside the boring cutter body and connected to the high-pressure air holes. The multiple high-pressure air holes are evenly distributed on the side wall of the boring cutter body to make the weight of the boring cutter body uniform.

[0006] Furthermore, the multiple air passages are evenly distributed in the boring cutter body to balance the counterweight of the boring cutter body, and the air passages communicate the high-pressure air holes with the rear end of the boring cutter body.

[0007] Furthermore, the multiple air passages are respectively connected to an air distribution valve arranged at the rear of the boring tool body, and the air distribution valve is provided with an air inlet for providing high-pressure gas.

[0008] Furthermore, multiple high-pressure air holes are symmetrically arranged in opposite directions on the side wall of the boring cutter body, so that the high-pressure air discharged by the two can offset each other and eliminate the vibration of the boring cutter body. The high-pressure air holes are arranged perpendicular to the side wall of the boring cutter body.

[0009] Furthermore, the cross section of the airway is circular.

[0010] A method for eliminating chatter of a boring tool with air pressure support comprises the following steps: connecting a boring tool body to a boring tool machine tool and starting a test, starting an air source connected to an air inlet, allowing high-pressure gas to enter the boring tool body along the axial direction of the air channel and to be ejected along the radial direction of the boring tool body, and then using an air distribution valve to adjust the air jet volume of each air channel respectively so as to provide support to the boring tool body, and using the air distribution valve to individually control the opening and closing of multiple air channels and the adjustment of gas flow rates to eliminate chatter generated by the boring tool body when machining a workpiece to be cut, and then controlling the size and action time of reaction forces in multiple directions on the boring tool body by controlling the respective air jet conditions of multiple high-pressure air holes to adapt to different boring working conditions.

[0011] Beneficial effects: the benefits brought by the invention and the indicators achieved.

[0012] 1) The reaction force of the jet is used to assist the boring cutter in supporting the boring bar, which improves the rigidity of the boring bar and helps to improve the boring stability;

[0013] 2) The gas distribution valve can individually control the opening and closing of the four channels and the gas flow rate, thereby controlling the size and action time of the reaction force in the four directions, so that the boring tool can adapt to different boring conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the boring tool with air pressure support of the present invention.

[0015] In the figure: 1-cut workpiece; 2-boring tool; 21-airway; 3-gas distribution valve; 31-air inlet DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, a boring tool with air pressure support includes a boring tool body 2, and a jet-type vibration-absorbing device for suppressing the vibration of the boring tool body 2 is provided on the boring tool body 2. The jet-type vibration-absorbing device includes multiple high-pressure air holes arranged on the side wall of the boring tool body 2 and multiple air channels 21 arranged in the boring tool body 2 and connected to the high-pressure air holes. The multiple high-pressure air holes are evenly distributed on the side wall of the boring tool body 2 to make the weight of the boring tool body 2 uniform. The multiple air channels 21 are evenly distributed in the boring tool body 2 to balance the weight of the boring tool body 2. The air channels 21 communicate the high-pressure air holes with the rear end of the boring tool body 2. The multiple air channels 21 are respectively connected to the gas distribution valves 3 arranged at the rear of the boring tool body 2, and the gas distribution valves 3 are provided with air inlets 31 for providing high-pressure gas. Multiple high-pressure air holes are symmetrically arranged in opposite directions on the side wall of the boring cutter body 2, so that the high-pressure air discharged by the two holes cancel each other out and eliminate the vibration of the boring cutter body 2. The high-pressure air holes are arranged perpendicular to the side wall of the boring cutter body 2. The cross section of the air channel 21 is circular.

[0018] A method for eliminating chatter of a boring tool with air pressure support, comprising the following steps: connecting a boring tool body 2 to a boring tool machine tool and starting a test, starting an air source connected to an air inlet 31, allowing high-pressure gas to enter the boring tool body 2 axially along the air channel 21 and be ejected radially from the boring tool body 2, and then using an air distribution valve 3 to adjust the jet volume of each air channel 21 to provide support for the boring tool body 2, and using the air distribution valve 3 to individually control the opening and closing of multiple air channels 21 and the adjustment of gas flow to eliminate chatter generated by the boring tool body 2 when machining a workpiece 1, and then controlling the jet conditions of each of the multiple high-pressure air holes to control the magnitude and action time of the reaction force in multiple directions on the boring tool body 2 to adapt to different boring working conditions.

[0019] The reaction force of the air jet provides auxiliary support for the boring bar and improves the supporting stiffness of the boring bar.

Claims

1. A boring tool with air pressure support, Features: The boring tool comprises a boring tool body (2), and a jet-type vibration-removing device for suppressing the vibration of the boring tool body (2) is provided on the boring tool body (2); The jet-type vibration-absorbing device comprises four high-pressure air holes arranged on the side wall of the boring cutter body (2) and four air passages (21) arranged in the boring cutter body (2) and connected to the high-pressure air holes. The four high-pressure air holes are evenly distributed on the side wall of the boring cutter body (2) so that the weight of the boring cutter body (2) is uniform. The four air passages (21) are evenly distributed in the boring cutter body (2) so that the boring cutter body (2) is counterweighted and balanced. The air passages (21) communicate with the high-pressure air hole and the rear end of the boring cutter body (2). The four air passages (21) are respectively connected to an air distribution valve (3) arranged at the rear end of the boring cutter body (2). The air distribution valve (3) is provided with an air inlet (31) for providing high-pressure gas. The air distribution valve (3) is used to adjust the air jet volume of each air passage (21) so as to provide support to the boring cutter body (2). Four high-pressure air holes are symmetrically arranged in opposite directions on the side wall of the boring cutter body (2), so that the high-pressure air discharged by the two holes cancel each other out, thereby eliminating the vibration of the boring cutter body (2), and the high-pressure air holes are arranged perpendicular to the side wall of the boring cutter body (2); The boring cutter body (2) is connected to a boring cutter machine and the test is started. The gas source connected to the gas inlet (31) is started, and the high-pressure gas enters the boring cutter body (2) along the axial direction of the gas channel (21) and is ejected along the radial direction of the boring cutter body (2). Then, the gas distribution valve (3) is used to adjust the gas injection volume of each gas channel (21) respectively, so as to support the boring cutter body (2). The opening and closing of the four gas channels (21) and the gas flow adjustment are individually controlled by the gas distribution valve (3), so as to eliminate the chatter generated by the boring cutter body (2) when processing the workpiece (1).

2. The boring tool with gas pressure support according to claim 1, Features: The gas distribution valve (3) can individually control the opening and closing of the four channels and the flow rate of the gas, and by controlling the respective jet conditions of the four high-pressure gas holes, the magnitude and action time of the reaction force in four directions on the boring tool body (2) can be controlled to adapt to different boring working conditions.

3. The boring tool with gas pressure support according to claim 1, Features: The cross section of the airway (21) is circular.

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