Over-positioning tool for milling of cast aluminum alloy large support

Abstract

The utility model relates to an over-positioning tool for milling a cast aluminum alloy large bracket. The over-positioning tool comprises a bottom plate, a vertical positioning pin, a first transverse positioning pin and a second transverse positioning pin, at least three vertical positioning pins are installed on the upper surface of the bottom plate, the axes of the vertical positioning pins are perpendicular to the upper surface of the bottom plate, at least two first transverse positioning pins are installed on the upper surface of the bottom plate, the axes of the first transverse positioning pins are parallel to the upper surface of the bottom plate, and the first transverse positioning pins horizontally face the front of the bottom plate. At least one second transverse positioning pin is mounted on the upper surface of the bottom plate, the axis of the second transverse positioning pin is parallel to the upper surface of the bottom plate, and the second transverse positioning pin horizontally faces the left side of the bottom plate; at least one floating supporting assembly is installed on the upper surface of the bottom plate. The tool is simple in structure and convenient to operate, and the surface quality and the qualified rate of parts can be greatly improved by using the tool.

Description

Technical Field

[0001] The utility model relates to a positioning tool, and specifically discloses a positioning tool used for milling processing of a large cast aluminum alloy bracket. Background Art

[0002] Due to the special structure, many cavities and small wall thickness of the cast aluminum alloy bracket, the existing six-point positioning tooling will cause serious surface chattering during the milling process, resulting in surface roughness and dimensional deviation. The milling process takes a long time, and changing the tool and adjusting the processing parameters cannot effectively solve the above problems. Summary of the invention

[0003] The utility model aims to overcome the deficiencies in the prior art and provide a positioning tool for milling a large cast aluminum alloy bracket, which can improve the qualified rate of parts and the processing stability.

[0004] According to the technical solution provided by the utility model, the milling process of the cast aluminum alloy large bracket uses a positioning tool, which includes a bottom plate, a vertical positioning pin, a first horizontal positioning pin and a second horizontal positioning pin;

[0005] At least three vertical positioning pins are installed on the upper surface of the bottom plate, the axes of the vertical positioning pins are perpendicular to the upper surface of the bottom plate, at least two first transverse positioning pins are installed on the upper surface of the bottom plate, the axes of the first transverse positioning pins are parallel to the upper surface of the bottom plate, and the first transverse positioning pins are horizontally facing the rear of the bottom plate, and at least one second transverse positioning pin is installed on the upper surface of the bottom plate, the axes of the second transverse positioning pins are parallel to the upper surface of the bottom plate, and the second transverse positioning pins are horizontally facing the left side of the bottom plate;

[0006] At least one floating support assembly is installed on the upper surface of the base plate.

[0007] Preferably, the floating support assembly comprises a screw limit seat, a support seat, a base, a clamping screw, a locking column, a support column and a spring;

[0008] The screw limit seat is fixed together with the support seat, a base is fixed at the bottom of the support seat, a compression screw hole is opened on the screw limit seat, a compression screw is installed in the compression screw hole, a screw head and a limiting ring are provided on the compression screw, the screw head of the compression screw is located on the outside of the screw limit seat, and the limiting ring of the compression screw is located between the screw limit seat and the support seat;

[0009] A support column mounting hole and a locking column mounting hole are provided on the support seat, the axis of the support column mounting hole is perpendicular to the axis of the locking column mounting hole and the support column mounting hole is connected to the locking column mounting hole, the axis of the support column mounting hole is perpendicular to the axis of the clamping screw hole, and the locking column mounting hole and the clamping screw hole are coaxially arranged; a support column and a spring are installed in the support column mounting hole, the spring is located below the support column, a support column inclined surface is provided on the support column, the support column inclined surface faces the screw limit seat, and a locking column plug plate plug hole is provided on the support column corresponding to the position of the support column inclined surface, the length direction of the locking column plug plate plug hole is perpendicular to the axial direction of the support column, and the locking column plug plate plug hole passes through the support column;

[0010] A locking column is installed in the locking column installation hole, a locking column plug plate is provided at the front end of the locking column, and locking column inclined surfaces are provided on both sides of the locking column plug plate, the locking column plug plate is inserted into the locking column plug plate plug hole, the locking column inclined surface cooperates with the supporting column inclined surface, and an internal threaded hole is provided at the end of the locking column facing the clamping screw side, and the internal threaded hole cooperates with the clamping screw.

[0011] The utility model has a simple structure and is easy to operate. The use of the tooling of the utility model can greatly improve the surface quality and the qualified rate of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the floating support assembly in the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with specific embodiments.

[0015] A positioning tool used for milling of a large cast aluminum alloy bracket, such as Figure 1 As shown, it comprises a bottom plate 1, a vertical positioning pin 2, a first horizontal positioning pin 3 and a second horizontal positioning pin 4;

[0016] At least three vertical positioning pins 2 are installed on the upper surface of the bottom plate 1, and the axes of the vertical positioning pins 2 are perpendicular to the upper surface of the bottom plate 1. At least two first transverse positioning pins 3 are installed on the upper surface of the bottom plate 1, and the axes of the first transverse positioning pins 3 are parallel to the upper surface of the bottom plate 1, and the first transverse positioning pins 3 are horizontally facing the rear of the bottom plate 1. At least one second transverse positioning pin 4 is installed on the upper surface of the bottom plate 1, and the axes of the second transverse positioning pins 4 are parallel to the upper surface of the bottom plate 1, and the second transverse positioning pins 4 are horizontally facing the left side of the bottom plate 1;

[0017] At least one floating support assembly A is installed on the upper surface of the base plate 1 .

[0018] like Figure 2 As shown, the floating support assembly A includes a screw limit seat 5, a support seat 6, a base 7, a clamping screw 8, a locking column 9, a support column 10 and a spring 11;

[0019] The screw limit seat 5 is fixed together with the support seat 6, a base 7 is fixed at the bottom of the support seat 6, a compression screw hole 5.1 is opened on the screw limit seat 5, a compression screw 8 is installed in the compression screw hole 5.1, a screw head and a limiting ring are provided on the compression screw 8, the screw head of the compression screw 8 is located on the outside of the screw limit seat 5, the limiting ring of the compression screw 8 is located between the screw limit seat 5 and the support seat 6, and the screw head and the limiting ring on the compression screw 8 can play a role of bidirectional limiting;

[0020] A support column mounting hole 6.1 and a locking column mounting hole 6.2 are provided on the support seat 6. The support column mounting hole 6.1 passes through the top surface and the bottom surface of the support seat 6, and the locking column mounting hole 6.2 passes through the opposite side surface of the support seat 6. The axis of the support column mounting hole 6.1 is perpendicular to the axis of the locking column mounting hole 6.2 and the support column mounting hole 6.1 is connected to the locking column mounting hole 6.2. The axis of the support column mounting hole 6.1 is perpendicular to the axis of the clamping screw hole 5.11, and the locking column mounting hole 6.2 is coaxial with the clamping screw hole 5.11. A support column 10 and a spring 11 are installed in the support column installation hole 6.1. The spring 11 is located below the support column 10. The bottom of the spring 11 contacts the top surface of the base 7. A support column inclined surface 10.1 is provided on the support column 10. The support column inclined surface 10.1 faces the screw limit seat 5. A locking column plug plate plug hole 10.2 is provided on the support column 10 corresponding to the position of the support column inclined surface 10.1. The length direction of the locking column plug plate plug hole 10.2 is perpendicular to the axial direction of the support column 10, and the locking column plug plate plug hole 10.2 passes through the support column 10.

[0021] A locking column 9 is installed in the locking column mounting hole 6.2, a locking column plug plate 9.2 is provided at the front end of the locking column 9, and locking column inclined surfaces 9.1 are provided on both sides of the locking column plug plate 9.2, the locking column plug plate 9.2 is inserted into the locking column plug plate plug hole 10.2, the locking column inclined surface 9.1 cooperates with the support column inclined surface 10.1, and an internal threaded hole is provided at the end of the locking column 9 facing the clamping screw 8 side, the internal threaded hole cooperates with the clamping screw 8, and the clamping screw 8 at one end away from the screw head is installed in the internal threaded hole of the locking column 9, thereby playing the role of locking the support column 9.

[0022] In the utility model, the vertical positioning pin 2 is used to position the bottom surface of the cast aluminum alloy bracket 100, the first transverse positioning pin 3 is used to position the front end surface of the cast aluminum alloy bracket 100, and the second transverse positioning pin 4 is used to position the right side surface of the cast aluminum alloy bracket 100.

[0023] The working principle of the floating support assembly A in the utility model is as follows:

[0024] 1. Loosen the clamping screw 8, press the support column 10 to the lowest position, and tighten the clamping screw 8;

[0025] 2. Clamp the cast aluminum alloy large bracket 100 to a fully limited state;

[0026] 3. Loosen the clamping screw 8, and the support column 10 naturally rises under the action of the spring 11 and contacts the bottom surface of the cast aluminum alloy large bracket 100;

[0027] 4. Tighten the compression screw 8, and the locking column 9 cannot slide outward. The locking column inclined surface 9.1 cooperates with the supporting column inclined surface 10.1. At this time, the supporting column 10 is in a self-locking state and no longer sinks, thereby playing the role of floating support.

[0028] The process steps of the utility model are as follows:

[0029] 1. Remove the pressure plate;

[0030] 2. Adjust the two floating support assemblies A, press the support column 10 to the lowest position, and tighten the clamping screw 8;

[0031] 3. Install the cast aluminum alloy bracket 100 on the tooling of the utility model, with the vertical positioning pin 2 close to the bottom surface of the cast aluminum alloy bracket 100, the first horizontal positioning pin 3 close to the front end surface of the cast aluminum alloy bracket 100, and the second horizontal positioning pin 4 close to the right side surface of the cast aluminum alloy bracket 100;

[0032] 4. Install a pressing plate at the position corresponding to each vertical positioning pin 2, each first horizontal positioning pin 3, and each second horizontal positioning pin 4 to press the cast aluminum alloy large bracket 100;

[0033] 5. Loosen the clamping screw 8 in the floating support assembly A, so that the support column 10 naturally rises under the action of the spring 11 and contacts the bottom surface of the cast aluminum alloy large bracket 100, and then tighten the clamping screw 8;

[0034] 6. Install a pressing plate at the position corresponding to each floating support assembly A to press the cast aluminum alloy large bracket 100;

[0035] 7. Milling of cast aluminum alloy large bracket 100;

[0036] 8. After the milling process of the cast aluminum alloy large bracket 100 is completed, first loosen the pressure plate at the position of each floating support assembly A, then loosen the pressure plate at the position of each first horizontal positioning pin 3 and each second horizontal positioning pin 4, and finally loosen the pressure plate at the position of each vertical positioning pin 2;

[0037] 9. Remove the large cast aluminum alloy bracket 100.

Claims

1. A positioning tool for milling a large cast aluminum alloy bracket, characterized by: It comprises a bottom plate (1), a vertical positioning pin (2), a first transverse positioning pin (3) and a second transverse positioning pin (4); At least three vertical positioning pins (2) are installed on the upper surface of the bottom plate (1), the axes of the vertical positioning pins (2) are perpendicular to the upper surface of the bottom plate (1), at least two first transverse positioning pins (3) are installed on the upper surface of the bottom plate (1), the axes of the first transverse positioning pins (3) are parallel to the upper surface of the bottom plate (1), and the first transverse positioning pins (3) are horizontally facing the rear of the bottom plate (1), and at least one second transverse positioning pin (4) is installed on the upper surface of the bottom plate (1), the axes of the second transverse positioning pins (4) are parallel to the upper surface of the bottom plate (1), and the second transverse positioning pins (4) are horizontally facing the left side of the bottom plate (1); At least one floating support assembly (A) is installed on the upper surface of the base plate (1).

2. The positioning tool for milling of a large cast aluminum alloy bracket as claimed in claim 1 is characterized by: The floating support assembly (A) comprises a screw limit seat (5), a support seat (6), a base (7), a clamping screw (8), a locking column (9), a support column (10) and a spring (11); The screw limit seat (5) is fixed together with the support seat (6), a base (7) is fixed at the bottom of the support seat (6), a clamping screw hole (5.1) is opened on the screw limit seat (5), a clamping screw (8) is installed in the clamping screw hole (5.1), a screw head and a limit ring are provided on the clamping screw (8), the screw head of the clamping screw (8) is located on the outside of the screw limit seat (5), and the limit ring of the clamping screw (8) is located between the screw limit seat (5) and the support seat (6); A support column mounting hole (6.1) and a locking column mounting hole (6.2) are provided on the support seat (6); the axis of the support column mounting hole (6.1) and the axis of the locking column mounting hole (6.2) are arranged perpendicularly and the support column mounting hole (6.1) and the locking column mounting hole (6.2) are connected; the axis of the support column mounting hole (6.1) and the axis of the clamping screw hole (5.1) are arranged perpendicularly; the locking column mounting hole (6.2) and the clamping screw hole (5.1) are arranged coaxially; a support column (1) is installed in the support column mounting hole (6.1); 0) and a spring (11), the spring (11) is located below the support column (10), a support column inclined surface (10.1) is provided on the support column (10), the support column inclined surface (10.1) faces the screw limit seat (5), a locking column plug plate insertion hole (10.2) is provided on the support column (10) at a position corresponding to the support column inclined surface (10.1), the length direction of the locking column plug plate insertion hole (10.2) is perpendicular to the axial direction of the support column (10), and the locking column plug plate insertion hole (10.2) passes through the support column (10); A locking column (9) is installed in the locking column installation hole (6.2), a locking column plug plate (9.2) is provided at the front end of the locking column (9), and locking column inclined surfaces (9.1) are provided on both sides of the locking column plug plate (9.2), the locking column plug plate (9.2) is inserted into the locking column plug plate insertion hole (10.2), the locking column inclined surface (9.1) cooperates with the supporting column inclined surface (10.1), and an internal threaded hole is provided at the end of the locking column (9) facing the clamping screw (8), and the internal threaded hole cooperates with the clamping screw (8).

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