Ear tab end face polishing device and polishing method

Abstract

The application discloses ear piece end face polishing device and polishing method, the device includes positioning mechanism, polishing depth adjusting mechanism, polishing width adjusting mechanism, polishing tool;The polishing width adjusting mechanism includes adjusting base, sliding table, the sliding table is arranged on the adjusting base along the radial direction of ear piece hole;One side of the ear piece is provided with the adjusting base, the adjusting base is connected with the positioning mechanism through the polishing depth adjusting mechanism;The positioning mechanism is fixedly connected with the ear piece, and is used for fixing the polishing tool on the ear piece;The polishing tool is connected with the sliding table, and the output end of the polishing tool passes through the sliding table and is connected with the polishing head, and the polishing head is arranged close to the ear piece end face.The application can be used for polishing the laminated structure of annular difficult-to-machine material and easy-to-machine material, and through forming a "planetary" polishing track, uniform polishing of the ear piece hole is realized, and accurate control of the polishing amount is realized, so that the machining precision, stability and efficiency of the ear piece end face are ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of ear end face processing, specifically relating to an ear end face grinding device and grinding method. Background Technology

[0002] Cold extrusion strengthening of holes is an effective fatigue-resistant technique for metal structures, showing significant results in improving fatigue life. In aircraft manufacturing, a combination of cold extrusion strengthening and interference fit press-fit bushing strengthening is often used to improve the fatigue life of airframe structural components. However, this process creates protrusions on the end faces of the holes, affecting assembly. Additional machining of these protrusions is required, but due to the small amount of protrusion and considerations of cost and efficiency, manual grinding is generally used. After using the press-fit bushing method, a layered structure of difficult-to-machine and easy-to-machine materials is formed on the end faces of the lugs. Manual grinding using conventional methods makes it difficult to control the amount of grinding and the dimensional tolerances of the lug end faces. The resulting lug end faces are uneven, with poor machining quality, making it impossible to guarantee grinding quality. Summary of the Invention

[0003] The purpose of this invention is to provide a grinding device and method for ear plate end faces, aiming to achieve efficient and precise grinding of the end faces of stacked ear plates. This invention can be used for grinding stacked structures of annular, difficult-to-machine materials and easy-to-machine materials. By forming a "planetary" grinding trajectory, uniform grinding of the ear plate openings and precise control of the grinding amount are achieved, ensuring the processing accuracy, stability, and efficiency of the ear plate end faces.

[0004] This invention is mainly achieved through the following technical solutions:

[0005] A grinding device for the end face of an ear piece includes a positioning mechanism, a grinding depth adjustment mechanism, a grinding width adjustment mechanism, and a grinding tool. The grinding width adjustment mechanism includes an adjustment base and a slide table, the slide table being slidably disposed on the adjustment base along the radial direction of the ear piece hole. The adjustment base is disposed on one side of the ear piece, and the adjustment base is connected to the positioning mechanism via the grinding depth adjustment mechanism. The positioning mechanism is fixedly connected to the ear piece for fixing the grinding tool onto the ear piece. The grinding tool is connected to the slide table, and the output end of the grinding tool passes through the slide table and is connected to a grinding head, the grinding head being disposed close to the end face of the ear piece. The grinding depth adjustment mechanism is used to adjust the distance between the grinding width adjustment mechanism and the ear piece to adjust the grinding depth of the grinding head. The grinding width adjustment mechanism is used to adjust the radial movement position of the grinding tool within the ear piece hole to adjust the grinding area of ​​the grinding head.

[0006] To better realize the present invention, the grinding depth adjustment mechanism further includes a positioning shaft, a micrometer head, a spring, and a thrust bearing; the positioning mechanism is provided with a through mounting cavity, the positioning shaft is slidably disposed in the mounting cavity, a micrometer head is fixedly disposed on one side of the positioning mechanism, and the telescopic end of the micrometer head extends into the mounting cavity and is connected to one end of the positioning shaft through the thrust bearing, the other end of the positioning shaft extends out of the mounting cavity and is connected to the adjustment base, and a spring is disposed between one end of the positioning shaft and the mounting cavity.

[0007] To better realize the present invention, the interior of the mounting cavity is provided with a stepped limiting surface, the end of the positioning shaft near the micrometer head is provided with a stepped surface, and a spring is sleeved between the stepped surface of the positioning shaft and the stepped limiting surface.

[0008] To better realize the present invention, the positioning mechanism further includes a positioning base, a positioning boss, and a fixing flange. The positioning base is fixedly provided on the other side of the lug. The positioning boss is provided in the middle of the positioning base corresponding to the lug hole. The positioning boss is provided in the middle of the positioning cavity. The micro head is connected to the positioning base through the fixing flange.

[0009] To better realize the present invention, the positioning mechanism further includes a clamping block, and clamping blocks are respectively provided at both ends of one side of the positioning base, and the ear piece is located between the clamping block and the positioning base.

[0010] To better realize the present invention, the positioning mechanism further includes a tapered fixed shaft and an expansion sleeve. The fixed shaft is disposed in the ear hole, and an expansion sleeve is disposed between the fixed shaft and the ear hole. The middle part of the fixed shaft is provided with an installation cavity. One end of the fixed shaft extends out of the ear hole and is connected to the micrometer head through a fixed nut connected by an inner thread, and abuts against the expansion sleeve through a tightening nut connected by an outer thread. The fixed nut is threadedly connected to the micrometer head.

[0011] To better realize the present invention, the fixed shaft is further provided with an internal thread corresponding to the fixed nut on one end, and an external thread corresponding to the clamping nut on the outside.

[0012] To better realize the present invention, it further includes a tool clamp and a connecting sleeve. A connecting sleeve is provided between the grinding tool and the slide. The tool clamp is connected to one end of the connecting sleeve near the grinding tool. The tool clamp is located outside the grinding tool. A clamping inner cavity is provided in the middle of the tool clamp corresponding to the grinding tool.

[0013] This invention is mainly achieved through the following technical solutions:

[0014] A method for polishing the end face of an ear piece, using the aforementioned polishing device, includes the following steps:

[0015] Step S1: Fix the polishing tool onto the ear piece using the positioning mechanism;

[0016] Step S2: Adjust the grinding depth adjustment mechanism so that the grinding head finds and contacts the highest point of the ear plate end face, and record the initial depth adjustment reading A of the grinding depth adjustment mechanism;

[0017] Step S3: Adjust the grinding width adjustment mechanism so that the grinding head covers the area around the ear hole, and then lock the grinding width adjustment mechanism.

[0018] Step S4: Set the grinding amount X, adjust the grinding depth adjustment mechanism so that the depth adjustment reading of the grinding depth adjustment mechanism is A+X, and then lock the grinding depth adjustment mechanism.

[0019] Step S5: Start the grinding tool and manually control the grinding head to move along the positioning axis of the grinding device in a "planetary" trajectory. Keep the speed uniform during the movement until no grinding occurs, then stop grinding.

[0020] Step S6: After completing the grinding of the first annular area, adjust the grinding width adjustment mechanism to the un-grinded area and lock the grinding width adjustment mechanism. Continue with step S5 until the entire area of ​​the ear end face that needs to be ground is ground.

[0021] Step S7: Set the grinding amount Y, adjust the grinding depth adjustment mechanism so that the depth adjustment reading is A+X+Y, and then lock the grinding depth adjustment mechanism.

[0022] Step S8: Repeat steps S5 to S7 until the polished area is flat and flush with the ear plate, or the polished area of ​​the ear plate meets the dimensional tolerance requirements.

[0023] The beneficial effects of this invention are as follows:

[0024] (1) This invention achieves grinding of the annular area of ​​the ear end face according to a "planetary" motion trajectory by using multiple hole shafts and step surface limiting, and precisely controls the posture of the grinding tool power output shaft perpendicular to the ear end face, reducing the skill level requirements of the operator. The "planetary" trajectory grinding achieves uniform grinding of the laminated material and the grinding disc, making the grinding surface flat and uniform;

[0025] (2) The present invention is equipped with a grinding width adjustment mechanism, which can adjust the size of the grinding area, increase the practicality of the grinding tool, and adapt to various work needs;

[0026] (3) The present invention is equipped with a grinding depth adjustment mechanism, which precisely controls the feed amount of the grinding tool along the ear hole axis through the micro head, thereby precisely controlling the grinding depth to ensure product quality. A spring is configured between the positioning shaft and the micro head, so that the grinding tool has a flexible buffer function when it feeds axially. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the connection structure between the positioning base and the ear piece;

[0028] Figure 2 This is a schematic diagram of the connection structure between the positioning base and the ear hole;

[0029] Figure 3 This is a schematic diagram of the connection structure between the positioning base and the fixed flange;

[0030] Figure 4 This is a schematic diagram of the connection structure between the expansion sleeve and the ear hole;

[0031] Figure 5 A schematic diagram of the connection structure between the fixed axis and the differential head;

[0032] Figure 6 A cross-sectional schematic diagram of the positioning base and the grinding depth adjustment mechanism;

[0033] Figure 7 This is a cross-sectional schematic diagram of the fixed shaft and the grinding depth adjustment mechanism.

[0034] The components are: 1-positioning base, 2-clamping block, 3-micro head, 4-fixed flange, 5-positioning shaft, 6-thrust bearing, 7-spring, 8-fixed shaft, 9-expansion sleeve, 10-clamping nut, 11-fixed nut, 12-adjusting base, 13-slide table, 14-connecting sleeve, 15-tool clamp, 16-grinding tool, 17-grinding head, 18-ear. Detailed Implementation

[0035] Example 1:

[0036] A device for grinding the end face of an ear piece, such as Figures 1-7 As shown, the device includes a positioning mechanism, a grinding depth adjustment mechanism, a grinding width adjustment mechanism, and a grinding tool 16. The positioning mechanism is fixedly connected to the ear piece 18 and is used to fix the grinding tool 16 onto the ear piece 18. The grinding width adjustment mechanism is connected to the positioning mechanism through the grinding depth adjustment mechanism. The output end of the grinding tool 16 passes through the grinding width adjustment mechanism and is connected to a grinding head 17, which is positioned close to the end face of the ear piece 18. The grinding depth adjustment mechanism is used to adjust the distance between the grinding width adjustment mechanism and the ear piece 18 to adjust the grinding depth of the grinding head 17. The grinding width adjustment mechanism is used to adjust the radial movement position of the grinding tool 16 within the ear piece hole to adjust the grinding area of ​​the grinding head 17.

[0037] In practical use, after the bushing pressing process is completed, the grinding device is fixed to the lug 18. The fixing method is selected according to the actual working conditions. When the end face of the lug 18 is not perpendicular to the lug hole, the positioning base 1 is used for fixing to ensure that the grinding surface is parallel to the end face when grinding the end face of the lug 18. When the lug hole is perpendicular to the end face, the expansion fixing device is used for fixing, which saves operating space and facilitates operation.

[0038] Preferably, such as Figures 1-7 As shown, the positioning mechanism is a positioning base 1 or an expansion and fixing device, used to fix the grinding device to the end face of the ear piece 18.

[0039] like Figures 1-3 as well as Figure 6 As shown, when the positioning mechanism is the positioning base 1, the grinding depth adjustment mechanism fixes the micrometer head 3 and the positioning shaft 5 to the positioning base 1 through the fixing flange 4 and the shaft hole. Figure 4 , Figure 5 , Figure 7 As shown, when the positioning mechanism is a tightening and fixing device, the grinding depth adjustment mechanism can also fix the micron head 3 and the positioning shaft 5 to the tightening and fixing device through the cooperation of the nut and the shaft hole.

[0040] The grinding width adjustment mechanism is installed on the positioning shaft 5 of the grinding depth adjustment mechanism through a shaft hole. The grinding tool 16 fixing device is installed on the slide table 13 of the grinding width adjustment mechanism through a shaft hole. The grinding area of ​​the output end of the grinding tool 16 can be adjusted by the grinding width adjustment mechanism. The grinding depth can also be precisely controlled by the grinding depth adjustment mechanism.

[0041] like Figures 1-3 as well as Figure 6 As shown, preferably, the positioning base 1 is used to fix the grinding tool 16 on the ear piece 18. The positioning base 1 is positioned by the circular boss on the positioning base 1 and the ear piece hole. The two ends of the positioning base 1 are provided with clamping blocks 2 for clamping. The circular boss has stepped holes for positioning the positioning shaft 5, spring 7, and thrust bearing 6 of the grinding depth adjustment mechanism.

[0042] Preferably, such as Figure 4 , Figure 5 , Figure 7As shown, the tightening and fixing device is another structural form for fixing the grinding tool 16 to the ear plate 18. The tightening and fixing device includes a fixed shaft 8, with a stepped hole and threads at the center of the shaft for positioning the positioning shaft 5, spring 7, thrust bearing 6, and micrometer head 3 of the grinding depth adjustment mechanism. The tightening and fixing device includes a fixed shaft 8 and a tightening sleeve 9. The fixed shaft 8 is tapered on the outside, with threads and a nut at one end. The tightening sleeve 9 is installed on the fixed shaft 8. Through the combined action of the tapered hole and the pressing of the nut 10, the grinding tool 16 is fixed to the ear plate 18. The tightening and fixing device also includes a fixing nut 11. The inner thread of the nut is used for mounting and fixing the micrometer head 3, and the outer thread is used for connecting with the fixed shaft 8.

[0043] Preferably, such as Figure 6 , Figure 7 As shown, the depth adjustment mechanism includes a positioning shaft 5, a spring 7, a thrust bearing 6, a micrometer head 3, and a fixing flange 4 for fixing the micrometer head 3. The positioning shaft 5 has two steps; one end is used for mounting and positioning with the grinding width adjustment mechanism, and the other end is used for mounting and fixing the spring 7. When fixed with the positioning base 1, the spring 7 is installed between the step surface of the positioning shaft 5 and the step surface of the center hole of the positioning boss of the positioning base 1 to control the retraction of the positioning shaft 5. When fixed with the tensioning device, the spring 7 is installed between the step surface of the positioning shaft 5 and the step surface of the center hole of the tensioning device fixing shaft 8 to control the retraction of the positioning shaft 5. The micrometer head 3 is used for grinding depth adjustment and is installed on the positioning base 1 or the tensioning fixing device through the fixing flange 4 and the fixing nut 11, respectively. A thrust bearing 6 is installed between the micrometer head 3 and the positioning shaft 5 to facilitate the rotation of the micrometer head 3 to adjust the depth.

[0044] Preferably, such as Figures 1-7 As shown, the grinding width adjustment mechanism includes an adjustment base 12 and a slide 13. The adjustment base 12 has holes that, through which the mechanism is mounted and positioned on the positioning shaft 5 of the depth adjustment mechanism via a hole-shaft fit. The slide 13 is mounted on the base and can move radially along the track of the slide 13 within the ear hole to adjust the grinding width. The slide 13 has stepped holes for mounting and positioning the grinding tool 16.

[0045] Preferably, such as Figure 6 , Figure 7 As shown, it also includes a tool holder 15 and a connecting sleeve 14 for fixing the grinding tool 16. The tool holder 15 consists of two clamping pieces that clamp the tool. The inner cavity shape of the clamping pieces is made according to the grinding tool 16. The two clamping pieces and the tool are fixedly clamped together with bolts. The connecting sleeve 14 is a stepped shaft with a hole in the center. It is fixed to the tool holder 15 with bolts and is installed and positioned by the hole-shaft fit with the slide table 13 on the grinding width adjustment mechanism. The grinding tool 16 can move along the positioning axis 5 of the grinding depth adjustment mechanism in a "planetary" trajectory to achieve grinding of the circumference of the ear hole.

[0046] This invention utilizes multiple hole-shaft connections and stepped surface positioning to achieve grinding of the annular area of ​​the ear plate 18 end face along a "planetary" motion trajectory. It precisely controls the perpendicularity of the power output shaft of the grinding tool 16 to the end face of the ear plate 18, reducing the skill level required of the operator. The "planetary" trajectory grinding achieves uniform grinding of the layered material and the grinding disc, resulting in a smooth and uniform grinding surface. This invention is equipped with a grinding width adjustment mechanism, allowing for adjustment of the grinding area size, increasing the practicality of the grinding tool 16 and adapting to various work requirements. This invention is also equipped with a grinding depth adjustment mechanism. The micrometer head 3 precisely controls the feed amount of the grinding tool 16 along the ear plate hole axis, thereby precisely controlling the grinding depth to ensure product quality. A spring 7 is placed between the positioning shaft 5 and the micrometer head 3, providing a flexible buffer function for the grinding tool 16 during axial feed.

[0047] Example 2:

[0048] A method for polishing the end face of an ear piece, using the aforementioned ear piece 18 end face polishing device, includes the following steps:

[0049] S01: Select the fixing method of the grinding device according to the actual working conditions. When the end face of the ear piece 18 is not perpendicular to the ear piece hole, use the fixing base for fixing. When the ear piece hole is perpendicular to the end face, use the tightening fixing device for fixing.

[0050] S02: Fix the polishing tool 16 onto the ear piece 18, and use the polishing head 17 to find and contact the highest point of the end face of the ear piece 18 by adjusting the micron head 3 and the polishing width adjustment mechanism provided by the polishing device, and record the reading A of the micron head 3.

[0051] S03: Adjust the grinding width adjustment mechanism so that the grinding head 17 covers the area around the ear hole, and then lock the grinding width adjustment mechanism.

[0052] S04: Set the grinding amount X, adjust the micrometer head 3 so that the reading of the micrometer head 3 is A+X, and then lock the micrometer head 3.

[0053] S05: Start the grinding tool 16 and manually control the grinding head 17 to move along the positioning axis 5 of the grinding device in a "planetary" trajectory. Maintain a uniform speed during the movement until no grinding occurs, then stop grinding.

[0054] S06: After completing the grinding of the first annular area, adjust the grinding width adjustment mechanism to the un-grinded area and lock the device. Continue with step S05 until the entire grinding area of ​​the ear piece 18 end face is completed.

[0055] S07: Set the grinding amount Y, adjust the micrometer head 3 so that the reading of the micrometer head 3 is A+X+Y, and then lock the micrometer head 3.

[0056] S08: Repeat steps S05 to S07 until the polished area is flat and flush with the plane of ear piece 18, or the polished area of ​​ear piece 18 meets the dimensional tolerance requirements.

[0057] This invention forms a "planetary" grinding trajectory, achieving uniform grinding of the ear piece opening and precise control of the grinding amount, thus ensuring the processing accuracy, stability and efficiency of the ear piece 18 end face.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A device for grinding the end face of an ear piece, characterized in that, The system includes a positioning mechanism, a grinding depth adjustment mechanism, a grinding width adjustment mechanism, and a grinding tool (16). The grinding width adjustment mechanism includes an adjustment base (12) and a slide (13). The slide (13) is slidably disposed on the adjustment base (12) along the radial direction of the ear hole. An adjustment base (12) is provided on one side of the ear (18). The adjustment base (12) is connected to the positioning mechanism through the grinding depth adjustment mechanism. The positioning mechanism is fixedly connected to the ear (18) and is used to fix the grinding tool (16) on the ear (18). The positioning mechanism is a positioning base (1) or a tightening and fixing device. The fixing method is selected according to the actual working conditions. When the ear (18) When the end face is not perpendicular to the ear hole, the positioning base (1) is used for fixing; when the ear hole is perpendicular to the end face, the expansion fixing device is used for fixing. The grinding tool (16) is connected to the slide (13), and the output end of the grinding tool (16) passes through the slide (13) and is connected to the grinding head (17). The grinding head (17) is set close to the end face of the ear (18). The grinding depth adjustment mechanism is used to adjust the distance between the grinding width adjustment mechanism and the ear (18) to adjust the grinding depth of the grinding head (17). The grinding width adjustment mechanism is used to adjust the radial movement position of the grinding tool (16) in the ear hole to adjust the grinding area of ​​the grinding head (17). The grinding depth adjustment mechanism includes a positioning shaft (5), a micro head (3), a spring (7), and a thrust bearing (6); the positioning mechanism is provided with a through mounting cavity, the positioning shaft (5) is slidably disposed in the mounting cavity, a micro head (3) is fixedly disposed on one side of the positioning mechanism, and the telescopic end of the micro head (3) extends into the mounting cavity and is connected to one end of the positioning shaft (5) through the thrust bearing (6), the other end of the positioning shaft (5) extends out of the mounting cavity and is connected to the adjustment base (12), and a spring (7) is disposed between one end of the positioning shaft (5) and the mounting cavity; When the positioning mechanism is a positioning base (1), the positioning mechanism includes a positioning base (1), a positioning boss, and a fixing flange (4). The positioning base (1) is fixedly provided on the other side of the ear piece (18). The positioning base (1) is provided with a positioning boss in the middle corresponding to the ear piece hole. The positioning boss is provided with an installation cavity in the middle. The micro head (3) is connected to the positioning base (1) through the fixing flange (4). When the positioning mechanism is an expansion and fixing device, the positioning mechanism includes a tapered fixing shaft (8) and an expansion sleeve (9). The fixing shaft (8) is set in the ear hole, and an expansion sleeve (9) is provided between the fixing shaft (8) and the ear hole. The middle part of the fixing shaft (8) is provided with an installation cavity. One end of the fixing shaft (8) extends out of the ear hole and is connected to the micro head (3) through a fixing nut (11) connected by an inner thread, and abuts against the expansion sleeve (9) through a tightening nut (10) connected by an outer thread. The fixing nut (11) is threadedly connected to the micro head (3).

2. The ear-plate end face grinding device according to claim 1, characterized in that, The mounting cavity is provided with a stepped limiting surface, and the end of the positioning shaft (5) near the micrometer head (3) is provided with a stepped surface. A spring (7) is sleeved between the stepped surface of the positioning shaft (5) and the stepped limiting surface.

3. The ear-plate end face grinding device according to claim 1, characterized in that, The positioning mechanism also includes a clamping block (2), and clamping blocks (2) are respectively provided at both ends of one side of the positioning base (1). The ear piece (18) is located between the clamping block (2) and the positioning base (1).

4. The ear-plate end face grinding device according to claim 1, characterized in that, The fixed shaft (8) has an internal thread corresponding to the fixed nut (11) at one end, and an external thread corresponding to the clamping nut (10) at the other end.

5. The ear-plate end face grinding device according to claim 1, characterized in that, It also includes a tool sleeve (15) and a connecting sleeve (14). A connecting sleeve (14) is provided between the grinding tool (16) and the slide (13). The tool sleeve (15) is connected to one end of the connecting sleeve (14) near the grinding tool (16). The tool sleeve (15) is located outside the grinding tool (16). The middle part of the tool sleeve (15) is provided with a clamping inner cavity corresponding to the grinding tool (16).

6. A method for polishing the end face of an ear piece, using the polishing apparatus described in any one of claims 1-5, characterized in that, Includes the following steps: Step S1: Fix the polishing tool (16) onto the ear piece (18) using the positioning mechanism; Step S2: Adjust the grinding depth adjustment mechanism so that the grinding head (17) finds and contacts the highest point of the end face of the ear piece (18), and record the initial depth adjustment reading A of the grinding depth adjustment mechanism; Step S3: Adjust the grinding width adjustment mechanism so that the grinding head (17) covers the area around the ear hole, and then lock the grinding width adjustment mechanism. Step S4: Set the grinding amount X, adjust the grinding depth adjustment mechanism so that the depth adjustment reading of the grinding depth adjustment mechanism is A+X, and then lock the grinding depth adjustment mechanism. Step S5: Start the grinding tool (16), manually control the grinding head (17) to move along the positioning axis (5) of the grinding device in a "planetary" trajectory, keep the speed uniform during the movement, and stop grinding when no grinding occurs; Step S6: After completing the grinding of the first annular area, adjust the grinding width adjustment mechanism to the un-grinded area and lock the grinding width adjustment mechanism. Continue with step S5 until the grinding of the entire area of ​​the ear piece (18) end face is completed. Step S7: Set the grinding amount Y, adjust the grinding depth adjustment mechanism so that the depth adjustment reading is A+X+Y, and then lock the grinding depth adjustment mechanism. Step S8: Repeat steps S5 to S7 until the polished area is flat and flush with the ear piece (18) plane, or the polished area of ​​the ear piece (18) meets the dimensional tolerance requirements.

Images