Clamping and milling tool for aviation extruded profile

Abstract

The utility model discloses a clamping and milling tool for aviation extruded profiles. The clamping and milling tool comprises a fixed clamping block, a movable clamping block, a vertical stop pin, a horizontal stop pin, at least two tool limiting pins and at least two tension bolts, wherein the respective clamping surfaces of the fixed clamping block and the movable clamping block are oppositely arranged, and the upper parts of the respective clamping surfaces of the fixed clamping block and the movable clamping block are provided with clearance grooves; the tool limiting pin and the tensioning bolt are connected with the middle of the fixed clamping block and the middle of the movable clamping block in a penetrating mode, the fixed clamping block and the movable clamping block are positioned through the tool limiting pin, and tensioning force is provided for the fixed clamping block and the movable clamping block through the tensioning bolt. According to the technical scheme, the problems that an existing milling tool is low in section applicability, large in labor intensity of workers, not suitable for frequent assembly and disassembly of parts and the like are solved.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of milling technology for aerospace extruded profiles, and particularly to a clamping and milling fixture for aerospace extruded profiles. Background Technology

[0002] The widespread use of profile parts is driven by both standardization and lightweighting requirements. However, the diverse cross-sectional shapes of profile parts lead to significant processing challenges and place high demands on machine tools and tooling. While CNC machine tools can currently meet the requirements for precision and rapid machining, the difficulties in tooling design and manufacturing remain unavoidable.

[0003] Traditional milling fixtures are only designed for a single cross-sectional shape. When milling different surfaces of the profile, secondary positioning is required, and the positioning points for secondary positioning do not coincide. Alternatively, the coordinate system of the part needs to be repositioned for each clamping. Such fixtures have disadvantages such as limited cross-sectional applicability, high labor intensity for workers, and unsuitability for frequent loading and unloading of parts. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems. This utility model provides a clamping and milling fixture for aerospace extruded profiles, so as to solve the problems of limited cross-sectional applicability, high labor intensity for workers, and unsuitability for frequent loading and unloading of parts in existing milling fixtures.

[0005] The technical solution of this utility model: This utility model embodiment provides an automated pressing tool for large-diameter bushings, including: a fixed clamping block 1, a movable clamping block 5, a vertical stop pin 2, a horizontal stop pin 4, at least two tooling limit pins 7 and at least two tensioning bolts 6.

[0006] The fixed clamping block 1 and the movable clamping block 5 are arranged opposite each other with their respective clamping surfaces, and the fixed clamping block 1 and the movable clamping block 5 are provided with clearance grooves on the upper part of their respective clamping surfaces; the tooling limiting pin 7 and the tensioning bolt 6 pass through and connect the middle of the fixed clamping block 1 and the movable clamping block 5, the tooling limiting pin 7 positions the fixed clamping block 1 and the movable clamping block 5, and the tensioning bolt 6 provides tension force to the fixed clamping block 1 and the movable clamping block 5;

[0007] The top end face of one end of the fixed clamping block 1 is provided with a pluggable vertical stop pin 2, and the upper part of the clamping surface at the same end is provided with a pluggable horizontal stop pin 4; the movable clamping block 5 has a clearance area corresponding to the position of the horizontal stop pin 4.

[0008] Optionally, in the clamping and milling fixture for aerospace extruded profiles as described above,

[0009] The clearance grooves in the fixed clamping block 1 and the movable clamping block 5 are clearance grooves opened on the upper part of the corresponding clamping surface according to the cross section of the profile to be clamped, and are used to place the clamped part of the profile in the clearance grooves on both side walls when clamping the profile.

[0010] Optionally, in the clamping and milling fixture for aerospace extruded profiles as described above,

[0011] Multiple sets of through holes are opened at the same horizontal position in the middle of the fixed clamping block 1 and the movable clamping block 5. The through holes at corresponding positions on the fixed clamping block 1 and the movable clamping block 5 are coaxial. The through holes at certain intervals are passed through by the tooling limit pin 7 to position and connect the fixed clamping block 1 and the movable clamping block 5. The through holes are matched with the tooling limit pin 7 in the same dimension so that the relative position between the fixed clamping block 1 and the movable clamping block 5 can only move in the axial direction of the tooling limit pin 7.

[0012] The remaining sets of through holes in the fixed clamping block 1 and the movable clamping block 5 are passed through by the tension bolts 6. The diameter of the through holes is slightly larger than that of the tension bolts 6 so that the tension bolts 6 only provide tension force and do not generate additional resistance with the hole wall.

[0013] Optionally, in the clamping and milling fixture for aerospace extruded profiles as described above,

[0014] The upper end face of the fixed clamping block 1 is provided with a tooling positioning hole 3, and the fixed clamping block 1 is positioned and installed on the milling machine tool through its tooling positioning hole 3, so as to keep the position of the fixed clamping block 1 always in the initial positioning position.

[0015] Optionally, in the clamping and milling fixture for aerospace extruded profiles as described above,

[0016] The tooling positioning hole 3 on the upper end face of the fixed clamping block 1 has a preset vertical distance from the clamping surface of the fixed clamping block 1, and the tooling positioning hole 3 has a preset distance from the vertical stop pin 2 in the length direction; the fixed clamping block 1 cooperates with the positioning mechanism on the machine tool through its tooling positioning hole 3 to achieve the original positioning of the tooling positioning hole 3, and a bushing is pressed into the tooling positioning hole 3 to improve the smoothness and accuracy of the inner wall of the hole.

[0017] Optionally, in the clamping and milling fixture for aerospace extruded profiles as described above,

[0018] The clamping and milling fixture is used to clamp and mill L-shaped, T-shaped and Z-shaped profiles; wherein, the clamping and milling fixture is positioned and connected to a positioning hole on each profile by a vertical stop pin 2 or a horizontal stop pin 4 on a fixed clamping block 1, and the milling process of each surface is realized by changing the position of the positioning surface of the profile.

[0019] The beneficial effects of this utility model: The embodiments of this utility model provide an automated pressing tool for large-diameter bushings, which has the following beneficial effects:

[0020] First, by opening clearance grooves on the clamping surface of the tooling body, it can be compatible with Z-shaped, T-shaped, L-shaped and other irregular cross-section profiles. Various common aerospace extruded profiles with different cross-sections can be milled on the same tooling body without the need to change the chuck and other accessories according to the cross-section, so that the tooling face has better applicability to aerospace extruded profiles with different cross-sections.

[0021] Secondly, after the clamping and milling fixture is installed on the machine tool platform, its position relative to the machine tool can be determined after being positioned by the fixture positioning hole 3. Then, the part is clamped between the fixed clamping block 1 and the movable clamping block 5, and positioned in the length direction by the vertical stop pin 2 or the horizontal stop pin 4 in a certain way. After positioning, tightening the tension bolt 6 can be regarded as the complete positioning of the part. When milling other surfaces of the profile, by making reasonable use of the vertical stop pin 2 or the horizontal stop pin 4, secondary positioning can be quickly performed, and there is no need to re-align the part coordinate system before starting the milling, which greatly reduces the labor intensity of the workers.

[0022] Third, based on the shape characteristics of aerospace extruded profiles, the effective milling time for profile parts is relatively short. A large amount of time in the total working time is occupied by auxiliary time such as loading and unloading parts and coordinate system alignment. By improving the applicability of tooling, quickly repositioning, and reducing alignment, the non-milling time in profile processing can be reduced, and work efficiency can be improved.

[0023] Fourth, the advantages of the clamping and milling fixture provided in this utility model embodiment are that it is lightweight and simple in structure, which facilitates the rapid loading and unloading of aerospace extruded profiles in the CNC milling process, reduces non-milling time in the production process such as frequent clamping and positioning, improves production efficiency, and reduces the labor intensity of workers. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0025] Figure 1 A schematic diagram of the overall structure of a clamping and milling fixture for aerospace extruded profiles provided in an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the clamping and milling fixture used to mill L-shaped profiles in Example 1 of the application of this utility model. Figure 2 Figure a shows milling on surface A and positioning on surface B; Figure b shows milling on surface B and positioning on surface B.

[0027] Figure 3This is a schematic diagram illustrating the clamping and milling of an L-shaped profile using a clamping milling fixture, as shown in Application Example 2 of this utility model. Figure 3 Figure a shows milling on surface A and positioning on surface B; Figure b shows milling on surface B and positioning on surface B.

[0028] Figure 4 This is a schematic diagram of the clamping and milling fixture used to mill the L-shaped profile in application example 3 of this utility model. Figure 4 Figure a shows milling on surface A and positioning on surface C; Figure b shows milling on surface B and positioning on surface C; Figure c shows milling on surface C and positioning on surface C.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Fixed clamping block; 2. Vertical stop pin; 3. Tooling positioning hole; 4. Horizontal stop pin; 5. Movable clamping block; 6. Tensioning bolt; 7. Tooling limit pin. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0032] As explained in the background section, traditional milling fixtures are only designed for a single cross-sectional shape. When milling different surfaces of the profile, secondary positioning is required, and the positioning points for secondary positioning do not coincide. Alternatively, the coordinate system of the part needs to be repositioned for each clamping operation. Such fixtures have disadvantages such as limited cross-sectional applicability, high labor intensity for workers, and unsuitability for frequent loading and unloading of parts.

[0033] To address the aforementioned problems, this utility model provides a clamping and milling fixture for aerospace extruded profiles.

[0034] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they will not be described again in some embodiments.

[0035] Figure 1 This is a schematic diagram of the overall structure of a clamping and milling fixture for aerospace extruded profiles provided in an embodiment of the present invention. The clamping and milling fixture for aerospace extruded profiles provided in this embodiment of the present invention includes: a power unit 7 and a bushing hydrostatic pressure assembly; wherein the bushing hydrostatic pressure assembly includes: a fixed clamping block 1, a movable clamping block 5, a vertical stop pin 2, a horizontal stop pin 4, at least two fixture limiting pins 7, and at least two tensioning bolts 6.

[0036] like Figure 1As shown in the embodiment of this utility model, the fixed clamping block 1 and the movable clamping block 5 are arranged opposite each other with their respective clamping surfaces, and the fixed clamping block 1 and the movable clamping block 5 are provided with clearance grooves on the upper part of their respective clamping surfaces; the tooling limiting pin 7 and the tensioning bolt 6 pass through and connect the middle of the fixed clamping block 1 and the movable clamping block 5, the tooling limiting pin 7 positions the fixed clamping block 1 and the movable clamping block 5, and the tensioning bolt 6 provides tension force to the fixed clamping block 1 and the movable clamping block 5.

[0037] In this embodiment of the present invention, a pluggable vertical stop pin 2 is provided on the top end face of one end of the fixed clamping block 1, and a pluggable horizontal stop pin 4 is provided on the upper part of the clamping surface at the same end; the movable clamping block 5 has a clearance area corresponding to the position of the horizontal stop pin 4.

[0038] In one embodiment of this utility model, the clearance grooves in the fixed clamping block 1 and the movable clamping block 5 are clearance grooves opened on the upper part of the corresponding clamping surface according to the cross section of the profile to be clamped, so that the clamped part of the profile is placed in the clearance grooves on both side walls when clamping the profile.

[0039] In one embodiment of this utility model, multiple sets of through holes are correspondingly formed at the same horizontal position in the middle of the fixed clamping block 1 and the movable clamping block 5, and the through holes at corresponding positions on the fixed clamping block 1 and the movable clamping block 5 are coaxial. In specific applications, through holes at certain intervals are passed through by tooling limit pins 7 to position and connect the fixed clamping block 1 and the movable clamping block 5. The through holes are fitted with the tooling limit pins 7 in such a way that the relative position between the fixed clamping block 1 and the movable clamping block 5 can only move in the axial direction of the tooling limit pins 7, that is, movement in all directions except the axial direction of the tooling limit pins 7 is restricted. In addition, the remaining sets of through holes in the fixed clamping block 1 and the movable clamping block 5 are passed through by tension bolts 6. The diameter of the through holes is slightly larger than that of the tension bolts 6 so that the tension bolts 6 only provide tension force and do not generate additional resistance with the hole wall.

[0040] In one embodiment of this utility model, the upper end face of the fixed clamping block 1 is provided with a tooling positioning hole 3, and the fixed clamping block 1 is positioned and installed on the milling machine through its tooling positioning hole 3, so as to keep the position of the fixed clamping block 1 always in the initial positioning position.

[0041] In specific implementation, one end of the fixed clamping block 1 has insertion holes for vertical stop pin 2 and horizontal stop pin 4 at the same position on the upper end surface and clamping surface along the length direction. When the vertical stop pin 2 or the horizontal stop pin 4 is inserted, it is ensured that the stop pin is inserted smoothly and that no radial shaking occurs after insertion.

[0042] In one embodiment of this utility model, the tooling positioning hole 3 on the upper end face of the fixed clamping block 1 has a preset vertical distance from the clamping surface of the fixed clamping block 1, and the tooling positioning hole 3 has a preset distance from the vertical stop pin 2 in the length direction. In specific use, the fixed clamping block 1 cooperates with the positioning mechanism on the machine tool through its tooling positioning hole 3 to achieve the original positioning of the tooling positioning hole 3. A bushing is pressed into the tooling positioning hole 3 to improve the smoothness and accuracy of the inner wall of the hole, and to avoid wear on the tooling positioning hole 3 during the cooperation with the positioning mechanism on the machine tool.

[0043] In one implementation of this utility model, the clamping and milling fixture can be used to clamp and mill L-shaped, T-shaped, and Z-shaped profiles. The clamping and milling fixture uses a vertical stop pin 2 or a horizontal stop pin 4 on the clamping block 1 to position and connect to a positioning hole on each profile. Milling of each profile is achieved by changing the position of the positioning surface. The clamping and milling methods for these various profiles are explained below through multiple application examples.

[0044] The clamping and milling fixture for aerospace extruded profiles provided in this embodiment of the invention has the following beneficial effects:

[0045] First, by opening clearance grooves on the clamping surface of the tooling body, it can be compatible with Z-shaped, T-shaped, L-shaped and other irregular cross-section profiles. Various common aerospace extruded profiles with different cross-sections can be milled on the same tooling body without the need to change the chuck and other accessories according to the cross-section, so that the tooling face has better applicability to aerospace extruded profiles with different cross-sections.

[0046] Secondly, after the clamping and milling fixture is installed on the machine tool platform, its position relative to the machine tool can be determined after being positioned by the fixture positioning hole 3. Then, the part is clamped between the fixed clamping block 1 and the movable clamping block 5, and positioned in the length direction by the vertical stop pin 2 or the horizontal stop pin 4 in a certain way. After positioning, tightening the tension bolt 6 can be regarded as the complete positioning of the part. When milling other surfaces of the profile, by making reasonable use of the vertical stop pin 2 or the horizontal stop pin 4, secondary positioning can be quickly performed, and there is no need to re-align the part coordinate system before starting the milling, which greatly reduces the labor intensity of the workers.

[0047] Third, based on the shape characteristics of aerospace extruded profiles, the effective milling time for profile parts is relatively short. A large amount of time in the total working time is occupied by auxiliary time such as loading and unloading parts and coordinate system alignment. By improving the applicability of tooling, quickly repositioning, and reducing alignment, the non-milling time in profile processing can be reduced, and work efficiency can be improved.

[0048] Fourth, the advantages of the clamping and milling fixture provided in this utility model embodiment are that it is lightweight and simple in structure, which facilitates the rapid loading and unloading of aerospace extruded profiles in the CNC milling process, reduces non-milling time in the production process such as frequent clamping and positioning, improves production efficiency, and reduces the labor intensity of workers.

[0049] The following examples illustrate the usage of the clamping and milling fixture for aerospace extruded profiles provided in this utility model embodiment.

[0050] Application Example 1

[0051] like Figure 2 The diagram shown is a clamping schematic of an application example 1 of this utility model, illustrating the use of a clamping milling fixture to mill an L-shaped profile. Figure 2 Figure a shows milling on surface A and positioning on surface B; Figure b shows milling on surface B and positioning on surface B.

[0052] In application example 1, the L-shaped profile is clamped between the fixed clamping block 1 and the movable clamping block 5. The horizontal stop pin 4 is inserted into the corresponding position of the fixed clamping block 1, and the L-shaped profile is positioned against the horizontal stop pin 4, thus positioning the L-shaped profile in the length direction. Simultaneously, the machine tool is aligned via the tooling positioning hole 3, ensuring that the contact surface between the fixed clamping block 1 and the L-shaped profile is a fixed plane. After the fixed clamping block 1 and the movable clamping block 5 are tightened with the tension bolt 6, the L-shaped profile is positioned in the width direction. At this point, the L-shaped profile is positioned at its B-side end on the tooling and machine tool, and the A-side outline can be milled.

[0053] After milling surface A, loosen the tension bolt 6, remove the semi-finished part, rotate it 90 degrees counterclockwise, clamp it into the fixture, insert the vertical stop pin 2 into the corresponding position of the fixed clamping block 1, and let the semi-finished part abut against the horizontal stop pin 4 at the end of surface B, so that the L-shaped profile is positioned in the length direction. Then tighten the tension bolt 6 and mill surface B. Throughout the process, the fixed clamping block 1 remains fixed relative to the machine tool, and the movable clamping block 5 moves and is clamped by the fixture limit pin 7 and the tension bolt 6.

[0054] Application Example 2

[0055] like Figure 3 The diagram shown is a clamping schematic of an L-shaped profile milled using a clamping milling fixture in application example 2 of this utility model. Figure 3 Figure a shows milling on surface A and positioning on surface B; Figure b shows milling on surface B and positioning on surface B.

[0056] Application Example 3

[0057] like Figure 4 The diagram shown is a clamping schematic of an L-shaped profile milled using a clamping milling fixture in application example 3 of this utility model. Figure 4Figure a shows milling on surface A and positioning on surface C; Figure b shows milling on surface B and positioning on surface C; Figure c shows milling on surface C and positioning on surface C.

[0058] See Figure 3 and Figure 4 As shown, clamping and milling of T-profiles and Z-profiles are performed in the same way as in application example 1.

[0059] The advantages of the clamping and milling fixture provided in this embodiment are that it is lightweight and simple in structure, which facilitates the rapid loading and unloading of aerospace extruded profiles in the CNC milling process, reduces non-milling time in the production process such as frequent clamping and positioning, improves production efficiency, and reduces the labor intensity of workers.

[0060] Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A clamping and milling fixture for aerospace extruded profiles, characterized in that, include: Fixed clamping block (1), movable clamping block (5), vertical stop pin (2), horizontal stop pin (4), at least two tooling limit pins (7) and at least two tension bolts (6); The fixed clamping block (1) and the movable clamping block (5) are arranged opposite each other with their respective clamping surfaces, and the fixed clamping block (1) and the movable clamping block (5) have clearance grooves on the upper part of their respective clamping surfaces; the tooling limit pin (7) and the tension bolt (6) pass through and connect the middle of the fixed clamping block (1) and the movable clamping block (5), the tooling limit pin (7) positions the fixed clamping block (1) and the movable clamping block (5), and the tension bolt (6) provides tension to the fixed clamping block (1) and the movable clamping block (5); The top end face of one end of the fixed clamping block (1) is provided with a pluggable vertical stop pin (2), and the upper part of the clamping surface at the same end is provided with a pluggable horizontal stop pin (4); the movable clamping block (5) has a clearance area corresponding to the position of the horizontal stop pin (4).

2. The clamping and milling fixture for aerospace extruded profiles according to claim 1, characterized in that, The clearance grooves in the fixed clamping block (1) and the movable clamping block (5) are clearance grooves opened on the upper part of the corresponding clamping surface according to the cross section of the profile to be clamped, and are used to place the clamped part of the profile in the clearance grooves on both sides when clamping the profile.

3. The clamping and milling fixture for aerospace extruded profiles according to claim 1, characterized in that, Multiple sets of through holes are opened at the same horizontal position in the middle of the fixed clamping block (1) and the movable clamping block (5), and the through holes at corresponding positions on the fixed clamping block (1) and the movable clamping block (5) are coaxial. The through holes at certain intervals are passed through by the tooling limit pin (7) to position and connect the fixed clamping block (1) and the movable clamping block (5). The through holes are matched with the tooling limit pin (7) in size so that the relative position between the fixed clamping block (1) and the movable clamping block (5) can only move in the axial direction of the tooling limit pin (7). The remaining sets of through holes in the fixed clamping block (1) and the movable clamping block (5) are passed through by tension bolts (6). The diameter of the through holes is slightly larger than that of the tension bolts (6) so that the tension bolts (6) only provide tension force and do not generate additional resistance with the hole wall.

4. The clamping and milling fixture for aerospace extruded profiles according to any one of claims 1 to 3, characterized in that, The upper end face of the fixed clamping block (1) is provided with a tooling positioning hole (3), and the fixed clamping block (1) is positioned and installed on the milling machine through its tooling positioning hole (3) so that the position of the fixed clamping block (1) is always kept in the initial positioning position.

5. The clamping and milling fixture for aerospace extruded profiles according to claim 4, characterized in that, The tooling positioning hole (3) on the upper end face of the fixed clamping block (1) has a preset vertical distance from the clamping surface of the fixed clamping block (1), and the tooling positioning hole (3) has a preset distance from the vertical stop pin (2) in the length direction; the fixed clamping block (1) cooperates with the positioning mechanism on the machine tool through its tooling positioning hole (3) to realize the original positioning of the tooling positioning hole (3), and a bushing is pressed into the tooling positioning hole (3) to improve the smoothness and accuracy of the inner wall of the hole.

6. The clamping and milling fixture for aerospace extruded profiles according to claim 4, characterized in that, The clamping and milling fixture is used to clamp and mill L-shaped, T-shaped and Z-shaped profiles; wherein, the clamping and milling fixture is used to position and connect a positioning hole on each profile by fixing the vertical stop pin (2) or horizontal stop pin (4) on the clamping block (1), and the milling process of each surface is realized by changing the positioning surface position of the profile.

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