An ultrasonic grinding machine for micro-hole processing

Abstract

This utility model discloses an ultrasonic grinding machine for micro-hole processing, belonging to the technical field of mechanical processing equipment. It includes a base, a guide column fixedly mounted on the top of the base, a top plate fixedly connected to the top of the guide column, a lead screw rotatably mounted between the top plate and the base, a threaded plate threaded to the outer surface of the lead screw, a cylinder fixedly mounted on the threaded plate, and a lifting plate fixedly mounted on the telescopic end of the cylinder. The lifting plate and the threaded plate are slidably connected to the outside of the guide column. Through the cooperation of the lead screw, the threaded plate, and the first driving mechanism, the height of the grinding needle can be finely adjusted. Simultaneously, the cylinder can achieve rapid lifting and lowering of the grinding needle. This combination solves the problem that a single cylinder cannot accurately align with the micro-hole or stably press down to the appropriate position, while also balancing alignment efficiency and adjustment accuracy, significantly improving the alignment efficiency and processing stability of the grinding needle and the micro-hole.

Description

Technical Field

[0001] This utility model relates to the field of fabric dyeing technology, and in particular to an ultrasonic grinding machine for microporous processing. Background Technology

[0002] In the field of precision machining, micro-hole components (usually referring to those with a diameter of less than 5mm) are widely used in high-end manufacturing fields such as aerospace, medical devices, and precision instruments. The quality of grinding and polishing of their inner walls directly determines the sealing performance, fluid conduction efficiency, and overall service life of the components, making it one of the core processes in precision machining.

[0003] Currently, the industry commonly employs a processing mode of "workpiece rotation driven by a mold base + grinding needle acting on the inner wall of the micro-hole" to achieve uniform grinding or polishing of the inner wall for micro-hole machining. However, while the mechanism used to drive the grinding needle's lifting and lowering in existing equipment (such as a single cylinder) can achieve rapid lifting and lowering, it is difficult to accurately align with the micro-hole position and cannot achieve fine adjustment of the grinding needle's height. This results in low alignment efficiency between the grinding needle and the micro-hole, and it is impossible to stably maintain the precise pressure required for machining, seriously affecting the pass rate and production efficiency of micro-hole machining. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the existing technology cannot achieve precise adjustment of the grinding needle height, resulting in low alignment efficiency between the grinding needle and the microhole, and the inability to stably maintain the precise pressure required for processing. Therefore, an ultrasonic grinding machine for microhole processing is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An ultrasonic grinding machine for micro-hole processing includes a base, a guide column fixedly mounted on the top of the base, a top plate fixedly connected to the top of the guide column, a lead screw rotatably mounted between the top plate and the base, a threaded plate threaded to the outer surface of the lead screw, a cylinder fixedly mounted on the threaded plate, a lifting plate fixedly mounted at the telescopic end of the cylinder, and the lifting plate and the threaded plate slidably connected to the outside of the guide column, a cover fixedly mounted on the upper surface of the lifting plate, an ultrasonic head disposed inside the cover, steel needles mounted on the cover, a mold base rotatably mounted on the base, a workpiece to be processed disposed on the mold base, and a first driving mechanism for driving the lead screw to rotate and a second driving mechanism for driving the mold base to rotate on the base.

[0007] Preferably, a grinding machine for grinding steel needles is fixedly installed on the top of the base.

[0008] Preferably, the first drive mechanism includes a first drive shaft and a second drive shaft rotatably mounted inside the base. The outer surfaces of the first drive shaft and the second drive shaft are both keyed with first synchronous pulleys, and the two first synchronous pulleys are connected by a first synchronous belt.

[0009] Preferably, both the outer surfaces of the second drive shaft and the lead screw are keyed with bevel gears, and the two bevel gears mesh with each other.

[0010] Preferably, a handwheel is provided on the outside of the base, and the handwheel is fixedly connected to one end of the first drive shaft.

[0011] Preferably, the second drive mechanism includes a motor fixedly installed inside the base, and the outer surface of the motor output end and the outer surface of the mold base are both keyed to a second synchronous pulley, and the two second synchronous pulleys are connected by a second synchronous belt drive.

[0012] Preferably, the mold base is integrated with a pressure sensor, which can output pressure signals during rotation.

[0013] Compared with the prior art, the present invention provides an ultrasonic grinding machine for micro-hole processing, which has the following beneficial effects.

[0014] 1. This utility model achieves fine adjustment of the height of the grinding needle through the cooperation between the lead screw, the threaded plate and the first drive mechanism. At the same time, the cylinder can realize the rapid lifting and lowering of the grinding needle. The combination of the two solves the problem that a single cylinder cannot accurately align with the micro hole or stably press down to the appropriate position. It also takes into account the alignment efficiency and adjustment accuracy, greatly improving the alignment efficiency and processing stability of the grinding needle and the micro hole.

[0015] 2. This utility model integrates a pressure sensor on the mold base, which can collect the contact pressure between the grinding needle and the inner wall of the microhole in real time while the workpiece is rotating and output a pressure signal. The operator can finely adjust the height of the grinding needle through the lead screw according to the signal to ensure that the grinding needle always maintains the stable pressure required for processing the workpiece. This effectively avoids the problem of uneven processing of the inner wall of the microhole caused by pressure fluctuations and significantly improves the processing accuracy and surface quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a front view of the present invention.

[0018] Figure 3 This is a schematic diagram of the first and second drive mechanisms of this utility model.

[0019] In the picture:

[0020] 1. Base; 2. Grinding needle machine; 3. Guide column; 4. Top plate; 5. Lead screw; 6. Lifting plate; 7. Cover; 8. Steel needle; 9. Mold base; 10. Workpiece; 11. Cylinder; 12. Threaded plate; 13. First drive shaft; 14. Second drive shaft; 15. First synchronous pulley; 16. Bevel gear; 17. Motor; 18. Second synchronous pulley; 19. Handwheel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-3 An ultrasonic grinding machine for micro-hole processing includes a base 1, a guide column 3, a top plate 4, a lead screw 5, a threaded plate 12, a cylinder 11, a lifting plate 6, a cover 7, an ultrasonic head, a steel needle 8, a mold base 9, a workpiece 10, a first driving mechanism, a second driving mechanism, and a grinding needle machine 2. The components work together to achieve precise grinding or polishing of the inner wall of the micro-hole.

[0023] The base 1 serves as the supporting foundation for the entire equipment and is made of high-strength metal material to ensure the stability of the equipment during operation. Its top is used to install the guide column 3, the mold base 9, and the grinding needle machine 2. An installation chamber is reserved inside to accommodate the first drive mechanism and the second drive mechanism.

[0024] Guide column 3 and top plate 4: The top of the guide column 3 is fixedly connected to the top plate 4 to form a stable frame structure. The outer surface of the guide column 3 is precision polished to ensure that the lifting plate 6 can slide smoothly along its axis and avoid the grinding needle deviation caused by jamming.

[0025] Lead screw 5 and threaded plate 12: Lead screw 5 is rotatably installed between top plate 4 and base 1, and its axis is parallel to guide post 3. Threaded plate 12 is threadedly connected to lead screw 5, and the edge of threaded plate 12 is provided with sliding hole matching guide post 3. Guide post 3 is provided through sliding hole, so that when lead screw 5 rotates, threaded plate 12 can be stably raised and lowered along the axis of guide post 3, avoiding threaded plate 12 from rotating synchronously with lead screw 5.

[0026] Cylinder 11 and lifting plate 6: Cylinder 11 is fixedly installed on threaded plate 12, and its extension end is set vertically upward and fixedly connected to lifting plate 6; the edge of lifting plate 6 is also provided with sliding holes that match guide post 3. Lifting plate 6 is slidably connected to the outside of guide post 3 through sliding holes, so that when cylinder 11 extends or retracts, it can drive lifting plate 6 to rise and fall quickly along guide post 3, thereby realizing the rapid positioning of steel needle 8.

[0027] Cover 7, ultrasonic head and steel needle 8: Cover 7 is fixedly installed on the upper surface of lifting plate 6. Its interior is a sealed chamber. An ultrasonic head is fixedly installed in the chamber. The ultrasonic head is an existing mature component. Its specific structure has not been improved, so it will not be described in detail. One end of the steel needle 8 passes through the bottom of cover 7 and lifting plate 6 and is fixedly connected to the energy output end of the ultrasonic head. The other end of the steel needle 8 extends vertically downward and is used to insert into the micro-hole of workpiece 10. The ultrasonic vibration generated by the ultrasonic head can be transmitted to the needle tip through the steel needle 8, which drives the grinding fluid in the micro-hole to move.

[0028] Mold base 9 and workpiece 10: The mold base 9 is rotatably mounted on the top center of the base 1 via bearings. A positioning groove matching the workpiece 10 is opened on its top. The workpiece 10 is placed in the positioning groove, and the positioning groove enables the workpiece 10 to be quickly positioned and fixed. The mold base 9 is integrated with a pressure sensor, which can collect the pressure signal of the workpiece 10 in real time and transmit it to the external control system. The operator can adjust the height of the steel needle 8 through the pressure value displayed by the control system to ensure that the pressure meets the processing requirements.

[0029] Grinding needle machine 2: The grinding needle machine 2 is fixedly installed on one side of the top of the base 1. It adopts the existing small precision grinding needle structure and can grind the tip of the steel needle 8 according to the processing requirements, so that the steel needle 8 forms the required taper, so as to better adapt to micro-holes of different diameters and improve the ultrasonic energy transmission efficiency and grinding effect.

[0030] The first drive mechanism is used to drive the lead screw 5 to rotate, thereby realizing the fine adjustment of the height of the threaded plate 12 and the steel needle 8. Its specific structure includes a first drive shaft 13, a second drive shaft 14, a first synchronous pulley 15, a bevel gear 16 and a handwheel 19.

[0031] Both the first drive shaft 13 and the second drive shaft 14 are rotatably mounted in the internal cavity of the base 1 via bearings. The axis of the first drive shaft 13 is horizontally arranged, with one end extending to the outside of the base 1 and fixedly connected to the handwheel 19, and the other end being limited by the inner wall of the base 1 via a bearing. The axis of the second drive shaft 14 is also horizontally arranged and parallel to the first drive shaft 13. The outer surfaces of the first drive shaft 13 and the second drive shaft 14 are keyed with first synchronous pulleys 15. The two first synchronous pulleys 15 are connected by a first synchronous belt, so that when the operator turns the handwheel 19, the first drive shaft 13 can drive the second drive shaft 14 to rotate synchronously through the first synchronous pulleys 15 and the first synchronous belt.

[0032] A bevel gear 16 is keyed to the outer surface of the end of the second drive shaft 14 away from the first synchronous pulley 15. A bevel gear 16 is also keyed to the outer surface of the bottom end of the lead screw 5. The two bevel gears 16 are matched in specifications and mesh with each other. When the second drive shaft 14 rotates, the bevel gear 16 on its outer surface can drive the bevel gear 16 on the outer surface of the lead screw 5 to rotate, thereby realizing the rotation of the lead screw 5. Since the lead screw 5 is threadedly connected to the threaded plate 12 and the threaded plate 12 is limited by the guide post 3 and cannot rotate, the rotation of the lead screw 5 can be converted into the threaded plate 12 rising and falling along the axial direction of the guide post 3, thereby realizing the fine adjustment of the height of the steel needle 8.

[0033] The second drive mechanism is used to drive the mold base 9 to rotate at a uniform speed, ensuring that the inner wall of the micro-hole of the workpiece 10 is uniformly stressed. Its specific structure includes a motor 17, a second synchronous pulley 18 and a second synchronous belt.

[0034] The motor 17 is fixedly installed at the bottom of the internal cavity of the base 1. The output end of the motor 17 is vertically upward, and a second synchronous wheel 18 is keyed to its outer surface. The outer surface of the mold base 9 is also keyed to a second synchronous wheel 18. The two second synchronous wheels 18 are connected by a second synchronous belt. After the motor 17 is started, its output end can drive the second synchronous wheel 18 on its own outer surface to rotate. Through the second synchronous belt, the second synchronous wheel 18 on the outer surface of the mold base 9 is driven to rotate, thereby realizing the uniform rotation of the mold base 9 and driving the workpiece 10 to rotate synchronously.

[0035] Working principle

[0036] First, start the grinding machine 2 on the top of the base 1. According to the micro-hole diameter and processing requirements of the workpiece 10 to be processed, place the tip of the steel needle 8 in the grinding station of the grinding machine 2. Grind the steel needle 8 through the grinding machine 2 to make the tip of the steel needle 8 form a taper that meets the requirements. After grinding is completed, turn off the grinding machine 2 and wait for subsequent processing.

[0037] Then, the workpiece 10 to be processed is placed on top of the mold base 9 and fixed. Subsequently, an appropriate amount of polishing fluid is injected into the micropores of the workpiece 10 to ensure that the polishing fluid fills the inside of the micropores, providing a medium for subsequent ultrasonic polishing.

[0038] Next, cylinder 11 is activated, and the telescopic end of cylinder 11 is retracted, causing the lifting plate 6 to descend rapidly along the guide column 3, so that the tip of the pre-tapered steel needle 8 is roughly aligned with the micro-hole of the workpiece 10. The operator then rotates the handwheel 19 on the outside of the base 1, which drives the first transmission shaft 13 to rotate. The first transmission shaft 13 drives the second transmission shaft 14 to rotate synchronously through the first synchronous wheel 15 and the first synchronous belt on the outer surface. The second transmission shaft 14 meshes with the bevel gear 16 at the bottom of the lead screw 5 through the bevel gear 16 on the outer surface, driving the lead screw 5 to rotate. When the lead screw 5 rotates, the threaded plate 12, which is threaded to the lead screw 5, slowly rises and falls along the guide column 3, thereby driving cylinder 11, lifting plate 6 and steel needle 8 to adjust their height synchronously. During this process, the operator observes the real-time pressure value of the pressure sensor on the mold base 9. When the tip of the steel needle 8 extends into the micro-hole and forms the stable pressure required for processing with the inner wall of the micro-hole, the operator stops rotating the handwheel 19, completing the precise alignment and pressure adjustment of the steel needle 8.

[0039] Finally, the motor 17 is started. The motor 17 drives the mold base 9 and the workpiece 10 to rotate at a constant speed through the second synchronous wheel 18 and the second synchronous belt on the outer surface. Then, the power of the ultrasonic head is turned on, and the ultrasonic head generates high-frequency ultrasonic vibration. This vibration is transmitted to the needle tip through the steel needle 8, which drives the grinding fluid in the micro-hole to move at high speed. The high-speed moving grinding fluid grinds or polishes the inner wall of the micro-hole of the rotating workpiece 10, thereby achieving precision machining of the inner wall of the micro-hole.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic lapping machine for micro-hole processing, comprising a base (1), characterized in that: A guide post (3) is fixedly installed on the top of the base (1). A top plate (4) is fixedly connected to the top of the guide post (3). A lead screw (5) is rotatably installed between the top plate (4) and the base (1). A threaded plate (12) is threadedly connected to the outer surface of the lead screw (5). A cylinder (11) is fixedly installed on the threaded plate (12). A lifting plate (6) is fixedly installed at the telescopic end of the cylinder (11). The lifting plate (6) and the threaded plate (12) are slidably connected to the outside of the guide post (3). A cover (7) is fixedly installed on the upper surface of the lifting plate (6). An ultrasonic head is provided inside the cover (7). A steel needle (8) is installed on the cover (7). A mold base (9) is rotatably installed on the base (1). A workpiece (10) to be processed is provided on the mold base (9). A first driving mechanism for driving the lead screw (5) to rotate and a second driving mechanism for driving the mold base (9) to rotate are provided on the base (1).

2. The ultrasonic lapping machine for micro-hole processing according to claim 1, characterized in that, A grinding machine (2) for grinding steel needles (8) is fixedly installed on the top of the base (1).

3. The ultrasonic lapping machine for micro-hole processing according to claim 1, characterized in that, The first drive mechanism includes a first drive shaft (13) and a second drive shaft (14) rotatably mounted inside the base (1). The outer surfaces of the first drive shaft (13) and the second drive shaft (14) are both keyed with first synchronous pulleys (15), and the two first synchronous pulleys (15) are connected to each other by a first synchronous belt.

4. The ultrasonic lapping machine for micro-hole processing according to claim 3, characterized in that, The outer surfaces of the second drive shaft (14) and the lead screw (5) are both keyed with bevel gears (16), and the two bevel gears (16) mesh with each other.

5. The ultrasonic lapping machine for micro-hole processing according to claim 4, characterized in that, A handwheel (19) is provided on the outside of the base (1), and the handwheel (19) is fixedly connected to one end of the first transmission shaft (13).

6. The ultrasonic grinding machine for micro-hole processing according to claim 1, characterized in that, The second drive mechanism includes a motor (17) fixedly installed inside the base (1). The outer surface of the output end of the motor (17) and the outer surface of the mold base (9) are both keyed with a second synchronous pulley (18). The two second synchronous pulleys (18) are connected by a second synchronous belt drive.

7. The ultrasonic lapping machine for micro-hole processing according to claim 1, characterized in that, The mold base (9) is equipped with a pressure sensor, which can output pressure signals in the rotation state.

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