Milling groove machining device

Abstract

The utility model relates to a milling groove machining device which comprises a milling groove body, a gland, a nut and an upper fixing cover. The milling groove body is of a positioning hole structure with a protrusion in the center, a workpiece is placed in and attached to the positioning hole in the milling groove body, the gland is placed in the workpiece, and the gland and the workpiece are firmly pressed on the milling groove body. An upper fixing cover is mounted on the milling groove body, and the outer edge of a workpiece is clamped between the milling groove body and the upper fixing cover; the groove milling and drilling precision of the large-diameter thin-wall precise aluminum alloy sealing cover part is guaranteed, and the problem that the part is scrapped due to deformation of the large-diameter thin-wall precise aluminum alloy sealing cover part is solved. The large-diameter thin-wall precise aluminum alloy sealing cover part with the wall thickness of 1.5-2 mm can be machined, the dimensional tolerance is within 0.15 mm, and the shape and position tolerance can also be guaranteed to be within 0.15 mm. The clamping device is high in positioning precision and easy to operate, workpieces are convenient to assemble and disassemble, and clamping force can evenly act on the clamped workpieces.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and specifically relates to a groove milling processing device for processing sealing covers, in particular to a groove milling processing device for precision aluminum alloy sealing covers with large diameter and thickness of 2 mm. Background Art

[0002] Currently, the processing methods for large-diameter, thin-walled, precision aluminum alloy sealing caps, such as single pieces, in small batches, rely on turning and milling to achieve the final dimensions. Precision positioning holes and slots are then machined on machining centers. However, factors such as cutting forces, clamping forces, and internal stresses can easily cause deformation, failing to meet the drawing requirements and ultimately resulting in the workpiece being scrapped due to out-of-tolerance conditions and unusable. Utility Model Content

[0003] The utility model provides a slot milling device, which aims to solve the problem that large-diameter, thin-walled precision aluminum alloy sealing cover parts are scrapped due to excessive deformation during slot milling.

[0004] In order to solve the above technical problems, the utility model provides a slot milling processing device, which is characterized in that it includes a slot milling body 12, a pressure cover 13 and an upper fixed cover: a positioning hole is provided in the center of the slot milling body, the workpiece 11 is placed in the positioning hole in the slot milling body 12 and fits into it, the pressure cover 13 is placed inside the workpiece 11, and the pressure cover 13 and the workpiece 11 are firmly pressed into the slot milling body 12; an upper fixed cover 16 is fixed on the upper end face of the slot milling body 12, and the outer edge of the workpiece is clamped between the slot milling body 12 and the upper fixed cover 16, and grooves are provided at corresponding positions on the outer sides of the slot milling body 12 and the upper fixed cover 16, and the position of the groove corresponds to the position where the workpiece needs to be milled.

[0005] Beneficial effects: The utility model ensures the processing accuracy of large-diameter, thin-walled precision aluminum alloy sealing cover parts, and solves the problem of parts scrapping caused by deformation of large-diameter, thin-walled precision aluminum alloy sealing cover parts. Large-diameter, thin-walled precision aluminum alloy sealing cover parts with a wall thickness of 1.5 to 2 mm can be processed, with a dimensional tolerance within 0.15 mm, and shape and position tolerances can also be guaranteed within 0.15 mm. The utility model is suitable for milling grooves of large-diameter, thin-walled precision aluminum alloy sealing cover parts. It has high positioning accuracy, simple operation, convenient loading and unloading of workpieces, and the clamping force can act evenly on the clamped workpiece, and the clamping force can be adjusted within a certain range according to different situations. It has a wide processing range and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 Schematic diagram of the sealing cover workpiece 11 after finishing the inner hole and outer diameter

[0007] Figure 2Schematic diagram of slot milling device

[0008] Figure 3 Schematic diagram of the assembly of the milling groove processing device and the upper fixed cover

[0009] Figure 4 Schematic diagram of the top view of the milling groove processing device and the upper fixed cover

[0010] Figure 5 C-type positioning key installation diagram

[0011] Figure 6 Schematic diagram of rotating the upper fixed cover 16 after milling and drilling

[0012] Figure 7 Schematic diagram of the finished workpiece. DETAILED DESCRIPTION

[0013] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation methods of the present invention are further described in detail below.

[0014] The utility model proposes a slot milling processing device, which is characterized by comprising an upper and lower part, wherein the lower part comprises a slot milling body 12, a pressure cover 13, and a nut 14; the upper part comprises an upper fixed cover; the slot milling body 12 is clamped on a three-jaw self-centering chuck on a fixed workbench;

[0015] The milling slot body is provided with a raised positioning hole structure in the center. The workpiece 11 is placed in the positioning hole in the milling slot body 12 and fits in place. The pressure cover 13 is placed inside the workpiece 11. The nut 14 is connected to the raised thread on the milling slot body to firmly press the pressure cover 13 and the workpiece 11 onto the milling slot body 12.

[0016] Two symmetrical flexible gaskets 15 are pasted on the upper end surface of the milling slot body 12. An upper fixing cover 16 is installed on the milling slot body 12. The outer edge of the workpiece is clamped between the milling slot body 12 and the upper fixing cover 16. The flexible gasket is flush with the upper surface of the outer edge of the workpiece. Two retractable fixing shafts 17 pass through the upper fixing cover 16 and are inserted into the milling slot body 12. By rotating the nuts on the upper ends of the retractable fixing shafts 17, the steel balls inside the retractable fixing shafts 17 are deeply inserted into the slots of the milling slot body 12.

[0017] Grooves are provided at corresponding positions on the outer sides of the milling slot body 12 and the upper fixed cover 16, and a C-shaped positioning key 18 is installed at the groove to accurately position the milling slot body 12 and the upper fixed cover 16. The gap between the C-shaped positioning key 18 and the groove size on the milling slot body 12 and the upper fixed cover 16 is between 0.02mm and 0.04, and the position of the groove corresponds to the position where the workpiece needs to be milled.

[0018] The upper fixing cover 16 and the milling slot body 12 are provided with protruding mounting plates on both sides. The corresponding positions of the mounting plates are provided with threaded holes for installing quick clamping wrenches 19. By turning the two quick clamping wrenches 19, the ends of the quick clamping wrenches are pressed against the upper fixing cover, so that the upper fixing cover 16 is tightly fitted to the workpiece 11 and the milling slot body 12. Figure 6 shown.

[0019] The clearance between the outer diameter of the workpiece 11 and the positioning hole of the milling slot body 12 is between 0.07mm and 0.14mm. The depth of the fine-machined outer diameter of the workpiece 11 and the depth of the positioning step of the milling slot body 12 are as consistent as possible, and the tolerance is controlled within ±0.02mm, which plays a full supporting role and prevents clamping deformation during the processing of large-diameter, thin-walled precision aluminum alloy sealing cover parts.

[0020] The specific processing steps are as follows:

[0021] S1. Select a vertical machining center with high precision, first clamp the sealing cover workpiece 11 after finishing the inner hole and outer diameter. Figure 2 In the slot milling device shown;

[0022] Clamp the milling slot body 12 on the three-jaw self-centering chuck on the fixed workbench, place the sealing cover workpiece 11 with the inner hole and outer diameter finely machined into the milling slot body 12, place the pressure cover 13 inside the workpiece 11, and use the nut 14 to firmly press the pressure cover 13 and the workpiece 11 onto the milling slot body 12.

[0023] The clearance between the outer diameter of the workpiece 11 and the inner hole of the milling slot body 12 is between 0.07mm and 0.14mm. The depth of the fine-machined outer diameter of the workpiece 11 and the depth of the positioning step of the milling slot body 12 are as consistent as possible, and the tolerance is controlled within ±0.02mm, which plays a full supporting role and prevents clamping deformation during the processing of large-diameter, thin-walled precision aluminum alloy sealing cover parts.

[0024] S2. Paste two symmetrical flexible gaskets 15 on the milling slot body 12, install the upper fixing cover 16 on the milling slot body 12, pass the two retractable fixing shafts 17 through the upper fixing cover 16, and insert them into the milling slot body 12. By rotating the nuts on the upper ends of the retractable fixing shafts 17, the steel balls inside the retractable fixing shafts 17 are deeply inserted into the slots of the milling slot body 12, as shown in FIG. Figure 3 shown.

[0025] S3, install C-shaped positioning key 18 in the groove of milling slot body 12 and upper fixed cover 16, so that milling slot body 12 and upper fixed cover 16 are accurately positioned, and the gap between C-shaped positioning key 18 and the groove size on milling slot body 12 and upper fixed cover 16 is between 0.02mm and 0.04, ensuring the positioning accuracy. Figure 4 shown.

[0026] S4. Radially clamp the workpiece to be grooved.

[0027] Pass the quick clamping wrench 19 through the threaded holes on both sides of the upper fixed cover 16, and fix the two quick clamping wrenches 19 to the mounting plates on both sides of the upper fixed cover and the milling slot body with four screws respectively. By turning the two quick clamping wrenches 19, the upper fixed cover 16 is tightly fitted to the workpiece 11 and the milling slot body 12, as shown in FIG. Figure 6 shown.

[0028] S5. Remove the C-type positioning key

[0029] S6. Drill holes and mill grooves at locations where C-type positioning keys are installed;

[0030] Adjust the milling cutter height along the grooves reserved in the milling groove body 12 and the upper fixed cover 16 to complete the milling groove processing, and complete the drilling processing along the 6 guide holes reserved in the upper fixed cover 16 (the 6 guide holes reserved in the upper fixed cover 16 are completely consistent with the position and size of the open groove, and serve the purpose of guide holes).

[0031] S7. Take out the finished parts after all processing

[0032] Loosen the two quick-clamping wrenches 19, rotate the nuts of any telescopic fixed shaft 17 in the opposite direction to shrink the steel ball inside the telescopic fixed shaft 17, pull out the telescopic fixed shaft 17 from the milling slot body 12, push the upper fixed cover 16 horizontally to rotate it along the other telescopic fixed shaft 17, loosen the nut 14, remove the pressure cover 13, and use a dust blower to blow air in the direction of the middle positioning rod of the milling slot body 12. Remove the workpiece under the action of compressed air. Finally, the large-diameter, thin-walled, precision aluminum alloy sealing cover 20 with all processing is obtained. Figure 6 、 7 Repeat the above clamping process to achieve subsequent part processing.

[0033] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A slot milling device, characterized in that: It includes a milling slot body, a pressure cover and an upper fixed cover: a positioning hole is provided in the center of the milling slot body, the workpiece is placed in the positioning hole in the milling slot body and fits into it, the pressure cover is placed inside the workpiece, and the pressure cover and the workpiece are firmly pressed into the milling slot body; an upper fixed cover is fixed on the upper end face of the milling slot body, the outer edge of the workpiece is clamped between the milling slot body and the upper fixed cover, and grooves are provided at corresponding positions on the outside of the milling slot body and the upper fixed cover, and the position of the groove corresponds to the position where the workpiece needs to be milled.

2. A slot milling device according to claim 1, characterized in that: It also includes a flexible gasket, which is arranged between the milling slot body and the upper fixed cover, and the flexible gasket is flush with the upper surface of the outer edge of the workpiece.

3. A slot milling device according to claim 2, characterized in that: Two flexible gaskets are symmetrically adhered to the upper end surface of the milling slot body.

4. The slot milling device according to claim 1, characterized in that: The slot milling body and the upper fixed cover are fixedly connected via a telescopic fixed shaft.

5. The slot milling device according to claim 1, characterized in that: The retractable fixed shaft passes through the upper fixed cover and is inserted into the milling slot body. The steel balls inside the retractable fixed shaft penetrate into the card slot of the milling slot body to achieve fixation.

6. The slot milling device according to claim 1, characterized in that: The upper fixed cover and the corresponding positions on both sides of the milling groove body are fixed together with the quick clamping wrench, and the end of the quick clamping wrench is pressed on the upper fixed cover.

7. The slot milling device according to claim 1, characterized in that: Install C-shaped positioning keys at the grooves of the milling slot body and the upper fixed cover for positioning.

8. The slot milling device according to claim 1, characterized in that: The workpiece is a sealing cover part, and the clearance between the outer diameter of the workpiece and the positioning hole of the milling slot body is 0.07mm to 0.14mm.

9. The slot milling device according to claim 1, characterized in that: The depth of the workpiece's outer diameter is consistent with the depth of the positioning step of the milling slot body, and the tolerance is controlled within ±0.02mm.

10. The slot milling device according to claim 7, characterized in that: The clearance between the C-shaped positioning key and the slot on the milling slot body and the upper fixed cover is 0.02mm to 0.04mm.

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