Liquid damping mirror image milling device

Abstract

The invention provides a liquid damping mirror image milling device which comprises a first mechanical arm and a second mechanical arm which are oppositely arranged, a workpiece fixing device is arranged between the first mechanical arm and the second mechanical arm, a milling cutter is clamped at the end of the first mechanical arm, and a liquid damper is clamped at the end of the second mechanical arm. The rear end of the liquid damper is provided with a liquid inlet pipe and a liquid return pipe which are communicated with the liquid storage tank; a partition plate is arranged in the liquid damper to divide the internal space of the liquid damper into a front chamber and a rear chamber, a plurality of liquid penetrating holes are formed in the partition plate, a liquid inlet pipe penetrates through the partition plate, a liquid outlet is located in the front chamber, and a liquid outlet of a liquid return pipe is located in the rear chamber. The mechanical arm has the beneficial effects that the mechanical arms are arranged on the two sides of the workpiece, the cutting force can be effectively balanced through the symmetrical layout, and vibration and deformation of the workpiece in the machining process are reduced. The liquid damper can absorb and disperse vibration energy generated in the machining process, the stability of the workpiece is enhanced, and the machining efficiency and the precision of the machined surface are improved.

Description

Technical Field

[0001] The invention relates to the technical field of milling processing devices, and in particular to a liquid damping mirror image milling processing device. Background Art

[0002] Thin-walled structural parts made of titanium alloy materials have excellent lightweight properties - extremely low mass per unit volume and outstanding specific strength advantage - which means that the overall weight is greatly reduced while maintaining high strength performance. These unique physical properties make them occupy an important position in the aerospace industry.

[0003] In the field of aerospace, for the design of aircraft, every gram of weight reduction can bring significant energy efficiency improvement, fuel consumption reduction and load capacity enhancement, which is crucial to improving the endurance of aircraft, reducing operating costs and enhancing flight safety. Therefore, titanium alloy thin-walled structures are widely used in many key parts such as aircraft body structural parts, engine components, landing gear systems, and spacecraft shells, propulsion systems, etc. due to their excellent comprehensive performance.

[0004] However, although thin-walled structures made of lightweight and high-strength alloy materials such as titanium alloys have shown unparalleled advantages in the aerospace industry, their thin-wall characteristics also bring a series of challenges, especially the relatively weak rigidity. Due to the small thickness of the thin-walled structure, its overall rigidity is low, which makes it very easy to vibrate during machining.

[0005] Chatter is a self-excited vibration caused by the interaction between cutting force and structural dynamic characteristics. It will lead to instability in the cutting process, which will seriously affect the processing efficiency and precision. In the processing of thin-walled structures, chatter will not only lead to the deterioration of the workpiece surface quality, produce undesirable defects such as ripples and vibration marks, but also aggravate the wear of the tool and shorten the tool life. In some extreme cases, it may even directly lead to tool breakage and machine tool damage, causing serious economic losses and safety risks. Although thin-walled structures made of lightweight and high-strength alloy materials such as titanium alloy have great application potential in the aerospace industry, the chatter problem in their processing process cannot be ignored. Summary of the invention

[0006] In order to solve the vibration problem of thin-walled workpieces during machining, the present invention provides a liquid damping mirror milling device, comprising a first mechanical arm and a second mechanical arm arranged opposite to each other, and a workpiece fixing device is arranged between the first mechanical arm and the second mechanical arm; The end of the first mechanical arm clamps the milling cutter, the end of the second mechanical arm clamps the liquid damper, the rear end of the liquid damper is provided with a liquid inlet pipe and a liquid return pipe connected to the liquid storage tank, and the front end is connected to the workpiece; A partition is arranged inside the liquid damper to divide the internal space of the liquid damper into a front chamber and a rear chamber. The partition is provided with a plurality of liquid permeable holes. The liquid inlet pipe passes through the partition and the liquid outlet is located in the front chamber, and the liquid return pipe liquid outlet is located in the rear chamber.

[0007] As a preferred solution, the workpiece fixing device is provided with a plurality of threaded holes for setting bolts to fix the workpiece.

[0008] As a preferred solution, the liquid inlet pipe is provided with a hydraulic pump for pressurization.

[0009] As a preferred solution, a pressure sensor is provided at the front end of the liquid damper, and the hydraulic pump and the pressure sensor are electrically connected to a PLC control center.

[0010] As a preferred solution, the liquid damper is drop-shaped, with a round head as the front end and a pointed head as the rear end, and the liquid damper is made of rubber.

[0011] As a preferred solution, the number of the liquid dampers is 1 to 4.

[0012] As a preferred solution, the front end wall thickness of the liquid damper is 2 to 6 mm.

[0013] The beneficial effects of the present invention are: 1. The present invention arranges mechanical arms on both sides of the workpiece, one side clamps the milling cutter for cutting, and the other side clamps the liquid damper for support. This symmetrical layout can effectively balance the cutting force and reduce the vibration and deformation of the workpiece during the processing. Since the liquid damper can absorb and disperse the vibration energy generated during the processing, the stability of the workpiece is enhanced, thereby improving the processing efficiency and the accuracy of the processed surface.

[0014] 2. The present invention changes the speed of filling and discharging liquid into the damper, thereby changing the liquid damping performance. A partition is set at the front end of the damper, and a water-permeable hole is opened. The water inlet pipe passes through the large hole above, and the length of the water outlet pipe is short, which can better reduce the loss of liquid damping impact and improve performance.

[0015] 3. The present invention adjusts the working state of the hydraulic pump according to real-time data through the PLC control center to control the pressure inside the liquid damper, thereby achieving precise control of vibration during the processing. This real-time monitoring and control mechanism makes the processing process more stable, can respond to changes in processing conditions in a timely manner, and ensure the continuity of the processing process and the processing quality of the workpiece. By accurately controlling the pressure of the liquid damper, cutting parameters can be optimized, material removal rate can be improved, processing time can be reduced, and the service life of tools and equipment can also be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein Figure 1 A schematic diagram of the structure of the present invention.

[0017] Figure 2 A schematic structural diagram of the liquid damper of the present invention.

[0018] Figure 3 A schematic structural diagram of a workpiece fixing device of the present invention.

[0019] The reference numerals in the accompanying drawings are: 1. First robotic arm 11. Milling cutter; 2. Second robotic arm; 3. Workpiece; 4. Workpiece fixing device; 41. Threaded hole; 5. Liquid damper; 51. Partition; 52. Liquid permeable hole; 6. Liquid return pipe; 7. Liquid inlet pipe; 8. Hydraulic pump; 9. Liquid storage tank. DETAILED DESCRIPTION

[0020] To illustrate the features of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Example: See also Figures 1 to 3 An embodiment of the present invention provides a liquid damping mirror milling processing device, including a first robotic arm 1 and a second robotic arm 2 arranged relatively to each other, and a workpiece fixing device 4 is arranged between the first robotic arm 1 and the second robotic arm 2. In this embodiment, the workpiece fixing device 4 has a plurality of threaded holes 41 for setting bolts to fix the workpiece 3.

[0022] The end of the first robotic arm 1 clamps the milling cutter 11, and the end of the second robotic arm 2 clamps the liquid damper 5. The rear end of the liquid damper 5 is provided with a liquid inlet pipe 7 and a liquid return pipe 6 connected to the liquid storage tank 9, and the front end is connected to the workpiece 3; a partition 51 is arranged inside the liquid damper 5 to divide the internal space of the liquid damper 5 into a front chamber and a rear chamber, and the partition 51 has a plurality of liquid permeable holes 52, the liquid inlet pipe 7 passes through the partition 51 and the liquid outlet is located in the front chamber, and the liquid return pipe 6 The outlet is located in the rear chamber.

[0023] In addition, in order to enhance the buffering performance of the liquid damper 5, the hydraulic pump 8 is provided in the liquid inlet pipe 7 to increase the water inlet pressure of the liquid inlet pipe 7. In addition, a pressure sensor is provided at the front end of the liquid damper 5, and the hydraulic pump 8 and the pressure sensor are electrically connected to the PLC control center to form a feedback mechanism for the pressure of the liquid damper 5. The power of the hydraulic pump 8 is adjusted in real time according to the pressure of the liquid damper 5. If the calculated control value indicates that the damping amount needs to be increased, the hydraulic pump will increase the flow rate of the hydraulic oil flowing into the damper, and may adjust the pressure of the hydraulic oil at the same time, so as to increase the liquid damping amount in the damper; conversely, if the damping amount needs to be reduced, the hydraulic pump will correspondingly reduce the flow rate of the hydraulic oil flowing into the damper. Through such a series of precise control operations, the amount of liquid damping in the damper can eventually reach an ideal equilibrium state.

[0024] Preferably, in this embodiment, the liquid damper 5 is configured to be in a droplet shape, with a round head as the front end and a pointed head as the rear end, and the liquid damper 5 is made of rubber material. The liquid damper 5 is configured to be in a droplet shape and because of the viscoelastic properties of the rubber material, it can consume energy under alternating stress, reduce mechanical vibration and reduce noise, and the rubber damping material can maintain stable performance within a wide temperature range, has good aging resistance, and is suitable for applications under different environmental conditions.

[0025] In particular, the front end wall thickness of the liquid damper 5 in this embodiment is set to 2 mm, and the performance of the damper is controlled by changing the thickness of the rubber layer, and the number of liquid dampers will change with the shape of the workpiece. When the length of the thin-walled workpiece is long, two or four liquid dampers can be used to support the thin-walled workpiece together, so that as the milling proceeds, the right end robot arm does not need to move frequently.

[0026] The above embodiments and drawings are only used to illustrate the technical solutions of the present invention, and are not intended to limit the present invention. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that any changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention. Other related technical structures not fully disclosed in the present invention are prior art in the art.

Claims

1. A liquid damping mirror milling processing device, comprising a first mechanical arm (1) and a second mechanical arm (2) arranged opposite to each other, a workpiece fixing device (4) being arranged between the first mechanical arm (1) and the second mechanical arm (2), characterized in that: The end of the first mechanical arm (1) clamps a milling cutter (11), the end of the second mechanical arm (2) clamps a liquid damper (5), a liquid inlet pipe (7) and a liquid return pipe (6) are provided at the rear end of the liquid damper (5) to communicate with a liquid storage tank (9), and the front end is connected to a workpiece (3); A partition (51) is arranged inside the liquid damper (5) to divide the internal space of the liquid damper (5) into a front chamber and a rear chamber. The partition (51) is provided with a plurality of liquid permeable holes (52). The liquid inlet pipe (7) passes through the partition (51) and the liquid outlet is located in the front chamber. The liquid return pipe (6) has a liquid outlet located in the rear chamber.

2. The liquid damping mirror milling device according to claim 1, characterized in that: The workpiece fixing device (4) is provided with a plurality of threaded holes (41) for arranging bolts to fix the workpiece (3).

3. The liquid damping mirror milling device according to claim 1, characterized in that: The liquid inlet pipe (7) is provided with a hydraulic pump (8) for increasing pressure.

4. The liquid damping mirror milling device according to claim 3, characterized in that: A pressure sensor is arranged on the outside of the front end of the liquid damper (5), and the hydraulic pump (8) and the pressure sensor are electrically connected to a PLC control center.

5. The liquid damping mirror milling device according to claim 1, characterized in that: The liquid damper (5) is drop-shaped, with a round head as the front end and a pointed head as the rear end, and the liquid damper (5) is made of rubber.

6. The liquid damping mirror milling device according to claim 1, characterized in that: The number of the liquid dampers (5) is 1 to 4.

7. The liquid damping mirror milling device according to claim 1, characterized in that: The front end wall thickness of the liquid damper (5) is 2 to 6 mm.

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