CN103433850B - A kind of restoring on line method of air bag polishing tool - Google Patents

Abstract

An online trimming method of an airbag polishing tool relates to an airbag polishing machine tool. Aiming at the problem of airbag polishing tool wear, an online trimming device and an online trimming method for an airbag polishing tool with simple structure, convenient operation and low cost are provided. The airbag polishing tool online trimming device includes a bracket, a tool holder, a trimming tool, a spring and a steel ball; In the slot, the spring is located at the bottom of the slot, and the spring top touches the steel ball. A position switching positioning groove is provided on the joint surface of the bracket and the knife holder, and the steel ball is locked in the position switching positioning groove. The online trimming method of the airbag polishing tool can not only trim the spherical airbag polishing tool with any radius, but also modify other arbitrary convex surface (such as paraboloid, aspherical) polishing tools. Simultaneously trim polishing tools with different surface shapes.

Description

A kind of online trimming method of airbag polishing tool

technical field

The invention relates to an airbag polishing machine tool, in particular to an online trimming device and an online trimming method for an airbag polishing tool.

Background technique

Airbag polishing technology is a new polishing method proposed in the 1990s, especially suitable for polishing curved surfaces. The airbag polishing technology uses a spherical airbag with a certain inflation pressure or pastes a polishing pad on the outer surface of the airbag as a polishing tool to polish the processed surface. Compared with the traditional polishing method, airbag polishing has the following characteristics: the polishing head fits well with the surface of the workpiece to be polished, and at the same time, the processing efficiency and surface quality can be controlled by controlling the inflation pressure. Because airbag polishing technology has the advantages of controllability and certainty, it is a curved surface polishing method with development potential.

At present, many companies and research institutes at home and abroad are committed to the research of airbag polishing theory and technology, and have achieved certain results. The IRP series polishing machine developed by Zeeko, which is applied to axisymmetric rotary optical devices, can polish the optical mirror with a maximum diameter of 2.3m, and the removal rate of BK7 glass reaches 120mm ³ /min, and the glass after grinding with a grinding wheel with a grain size of 800 The surface was polished and tested to obtain a surface roughness of Ra2.47nm (DD Walker et al.Commissioning of the first Precessions1.2m CNC Polishing Machines for Large Optics.Proc.of SPIE Vol.6288,62880P,2006); Harbin Institute of Technology Gao Bo et al. (Gao Bo, Xie Gang, Yao Yingxue, Yuan Zhejun. New Technology of Airbag Tool Polishing. Optical Technology, Vol.30(3), 2004.) used the airbag polishing tool to target BK7 glass material on a CNC milling machine Processing test, a smooth surface of Ra0.5nm was obtained.

As material is removed from the machined surface of the workpiece, wear of the bladder or polishing pad also occurs. During the polishing process, the wear of air pockets or polishing pads will not only affect the processing efficiency, but also affect the contact between the polishing tool and the processed surface, thereby affecting the polishing precision and the certainty of the polishing process. Therefore, the air pocket or the polishing pad needs to be trimmed during the polishing process. At present, there are very few trimming devices for airbag polishing tools at home and abroad; moreover, most of the existing trimming devices are independent systems, which have problems such as high cost, strong specificity, and complicated operation. Therefore, it is of great significance to design an on-line trimming method and its device with low cost, wide applicability and simple operation for the polishing process.

Contents of the invention

The object of the present invention is to solve the problem of airbag polishing tool wear, and provide an airbag polishing tool online trimming device and an online trimming method with simple structure, convenient operation and low cost.

An airbag polishing tool online trimming device according to the present invention includes a bracket, a tool holder, a trimming tool, a spring and a steel ball;

The tool holder is installed on the bracket and connected with the bracket in rotation. The trimming tool is installed on the tool holder. The tool holder is provided with a slot, and the spring and the steel ball are arranged in the slot. The spring is located at the bottom of the slot, and the spring top touches the steel ball. The joint surface of the frame is provided with a station switching positioning groove, and the steel ball is locked in the station switching positioning groove.

The tool holder can be locked with the bracket through the tool holder locking bolt, and the trimming tool can be locked on the tool holder through the tool locking bolt.

The station switching positioning groove may include a trimming state positioning groove and an idle state positioning groove.

Preferably, the locking bolt of the knife rest is covered with an external fixing ring, which can prevent the locking bolt of the knife rest from falling off, and is also convenient for the rotation of the knife rest.

The online trimming method of the airbag polishing tool of the present invention adopts the online trimming device of the airbag polishing tool of the present invention, comprising the following steps:

1) Turn the tool holder to the vertical direction so that the trimming tool faces upwards, and lock the tool locking bolt to fix the tool holder;

2) Turn on the polishing machine spindle, adjust the airbag polishing tool of the polishing machine so that the apex of the airbag of the airbag polishing tool is at the lowest point, and control the movement of the XYZ axes of the polishing machine until the apex of the airbag touches the dressing tool;

3) Control the airbag polishing tool to move downward, so that the airbag polishing tool swings back and forth, so as to realize the trimming of the airbag surface by the trimming tool;

4) After trimming, unscrew the locking bolt of the tool holder, turn the tool holder, and turn the tool holder to the idle position. At this time, the trimming tool is parallel to the surface of the workbench, and lock the locking bolt of the tool holder.

Compared with the prior art, the beneficial effects of the present invention are as follows:

When the present invention is used, the support of the trimming device is installed on the workbench of the airbag polishing machine tool. The tool locking bolt is used to lock and fix the station position of the trimming tool to prevent the trimming tool from moving. When the steel ball falls into the position switching positioning groove under the action of the spring, the positioning of the tool holder around the rotation axis is realized; under a certain force of the tool holder, the steel ball can smoothly switch from the position to the positioning groove. The knife holder slides out of the slot and the knife holder rotates around the bracket. When the tool holder rotates to the station position and the idle position (that is, the steel ball is located in the positioning groove in the trimming state and the positioning groove in the idle state), then tighten the locking bolt of the tool holder to fix the tool holder on the bracket. When the polishing tools need to be trimmed, set the tool holder to the working position; when no trimming is required, set the tool holder to the idle position.

Due to the adoption of the above technical solution, the online trimming device for the airbag polishing tool of the present invention has the advantages of simple structure, convenient operation and low cost, and can realize online trimming of the airbag polishing tool.

The invention not only can repair spherical airbag polishing tools with any radius, but also can repair other arbitrary convex curved surfaces (such as paraboloids and aspheric surfaces) polishing tools. When modifying polishing tools with different surface shapes at the same time, there is no need to modify any part of the device, only the program in the CNC system of the machine tool needs to be modified, which avoids the continuous assembly and disassembly of the airbag polishing tool and eliminates the repeated installation error of the airbag polishing tool. It has a simple structure and does not need other complicated control systems. It only needs to use the system of the polishing machine tool itself to realize the trimming function, so the cost of trimming the airbag polishing tool can be greatly reduced.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of an online trimming device for a polishing tool for airbags according to the present invention.

FIG. 2 is a schematic diagram of the right view of FIG. 1 .

Fig. 3 is a schematic diagram of installation of an embodiment of an online trimming device for an airbag polishing tool according to the present invention.

Fig. 4 is a schematic diagram of installation and use of an embodiment of an online trimming device for an airbag polishing tool according to the present invention.

The marks in Figures 1 to 4 indicate:

1. Workbench; 2. Magnetic base; 3. Bracket; 4. Tool rest; 5. Dressing tool; 6. Air bag; 7. Polishing head; 8. First swing arm; 9. Spindle motor; 10. First servo Motor; 11. Cantilever; 12. Second servo motor; 13. Second swing arm; 14. Tool locking bolt; 15. Tool holder locking bolt; 16. Tool holder rotation shaft; 17. Column; 18. Base; 19. Spring; 20. Steel ball; 21. External fixing ring; 31. Insert groove; 32. Position switching positioning groove.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to FIGS. 1 to 4 , an embodiment of an online trimming device for an airbag polishing tool according to the present invention includes a bracket 3 , a knife holder 4 , a trimming tool 5 , a spring 19 and a steel ball 20 . The knife rest 4 is installed on the support 3 through the knife rest rotating shaft 16 and is rotatably connected with the support 3 . The knife rest 4 can rotate around the knife rest rotating shaft 16 , that is, the knife rest 4 can rotate relative to the support 3 . The trimming tool 5 is installed on the knife rest 4, the knife rest 4 is provided with a slot 31, the spring 19 and the steel ball 20 are arranged in the slot 31, the spring 19 is positioned at the bottom of the slot 31, and the spring 19 touches the steel ball 20 on the top of the support 3 and the steel ball 20. The surface of the support at the junction of the knife rest 4 is provided with two station switching positioning grooves 32 (including trimming state positioning grooves and idle state positioning grooves, one station switching positioning groove 32 is drawn in Figure 1), The steel ball 20 is locked in the position switching positioning groove 32 .

The tool holder 4 is locked to the bracket 3 through the tool holder locking bolt 15 , and the trimming tool 5 can be locked on the tool holder 4 through the tool fixing bolt 14 . The said knife rest locking bolt 15 is covered with an external fixing ring 21, the outer fixing ring 21 can prevent the knife rest locking bolt 15 from falling off, and also facilitate the rotation of the knife rest 4.

Arrows in FIG. 4 indicate the directions of rotation or movement of the corresponding components.

The embodiment of the online trimming method of the airbag polishing tool according to the present invention adopts the above-mentioned online trimming device embodiment of the airbag polishing tool, and the bracket 3 is installed on the workbench 1 of the polishing machine tool, and the work includes the following steps:

1) Turn the tool holder 4 to the vertical direction, make the trimming tool 5 face up, and lock the tool locking bolt 14 to fix the tool holder 4;

2) Turn on the polishing machine spindle, adjust the airbag polishing tool of the polishing machine so that the apex of the airbag 6 of the airbag polishing tool is at the lowest point, and control the movement of the XYZ axes of the polishing machine until the apex of the airbag 6 touches the dressing tool 5;

3) Control the airbag polishing tool to move downward, so that the airbag polishing tool swings back and forth, so as to realize the trimming of the surface of the airbag 6 by the trimming tool 5;

4) After trimming, unscrew the tool holder locking bolt 15, pull the tool holder 4, and turn the tool holder 4 to the idle position. Can.

As shown in Fig. 3 and Fig. 4, described polishing lathe comprises base 18, workbench 1, magnetic force base 2, column 17, cantilever 11, first servo motor 10, second swing arm 13, second servo motor 12, the first A swing arm 8, a spindle motor 9, a polishing head 7, an air bag 6 and a numerical control system. Workbench 1 and column 17 are installed on the base 18, cantilever 11 is installed on the column 17, the first servo motor 10 is installed on the cantilever 11, and can take the second swing arm 13 to do swinging motion around the cantilever 11; The motor 12 is installed on the second swing arm 13, and can drive the first swing arm 8 to perform swinging motion around the second swing arm 13; the main shaft motor 9 is installed on the first swing arm 8, and can drive the polishing head 7 along its The axis rotates, and the movement of each axis is controlled by the numerical control system.

When the steel ball 20 falls in the station switching positioning groove 32 under the action of the spring 19, the positioning of the knife rest 4 rotating around the knife rest rotating shaft 16 is realized; the size of the station switching positioning groove 32 should not be too large , to ensure that the steel ball 20 can smoothly slide out from the station switching positioning groove 32 under a certain force of the tool holder 4 . The knife rest locking bolt 15 is installed on the knife rest 4 , in order to prevent the knife rest locking bolt 15 from being lost, and also for the convenience of operation, the external fixing ring 21 enables the knife rest locking bolt 15 to be sleeved on the knife rest 4 . When the knife rest 4 rotates to the working position or the idle position, the steel ball 20 slides into the position switching positioning groove 32 under the action of the spring 19 to realize the positioning of the knife rest 4, and then tightens the knife rest locking bolt 15, and the knife rest can be moved 4 is fixed on the bracket 3. In order not to affect the polishing process, the bracket 3 is arranged on one side of the magnetic base 2, and the knife rest 4 is set to be movable. When the airbag polishing tool needs to be trimmed, the knife rest 4 is pulled to the working position; when the trimming is not needed, the knife rest 4 is pulled back to the idle position.

Claims (1)

1. an online trimming method of an airbag polishing tool, characterized in that, adopt an online trimming device for an airbag polishing tool, and the online trimming device for an airbag polishing tool includes a support, a knife rest, a trimming tool, a spring and a steel ball; the knife rest is installed on On the bracket and rotatably connected with the bracket, the trimming tool is installed on the tool holder, the tool holder is provided with a slot, the spring and the steel ball are set in the slot, the spring is located at the bottom of the slot, the spring top touches the steel ball, and is on the joint surface of the bracket and the tool holder There is a station switching positioning groove, and the steel ball is locked in the station switching positioning groove; the tool holder is locked with the bracket through the tool holder locking bolt, and the dressing tool is locked on the knife through the tool locking bolt. on the frame; the position switching positioning groove includes a trimming state positioning groove and an idle state positioning groove; the tool holder locking bolt is covered with an external fixing ring; The online trimming method includes the following steps: 1) Turn the tool holder to the vertical direction so that the trimming tool faces upwards, and lock the tool locking bolt to fix the tool holder; 2) Turn on the polishing machine spindle, adjust the airbag polishing tool of the polishing machine so that the apex of the airbag of the airbag polishing tool is at the lowest point, and control the movement of the XYZ axes of the polishing machine until the apex of the airbag touches the dressing tool; 3) Control the airbag polishing tool to move downward, so that the airbag polishing tool swings back and forth, so as to realize the trimming of the airbag surface by the trimming tool; 4) After trimming, unscrew the locking bolt of the tool holder, turn the tool holder, and turn the tool holder to the idle position. At this time, the trimming tool is parallel to the surface of the workbench, and lock the locking bolt of the tool holder.