A positioning tool for casting machining

Abstract

The utility model discloses a kind of positioning toolings of casting processing, belong to casting processing technical field;Including the workbench for placing flange after casting, rotating plate is rotatably connected in support frame;Two center symmetry settings electric telescopic rod are fixedly arranged in rotating plate below, and the working end of electric telescopic rod is fixedly connected with the positioning assembly that can be inserted into mounting hole downwards to thereby fix flange;Polishing equipment is located in the upper of one of the mounting hole of flange, and polishing equipment is located in rotating plate, the rotating path of all mounting holes on the flange that positioning assembly can drive rotatable flange is rotated on.This application utilizes two-point positioning principle, change the mode of traditional clamping, can realize quick positioning and fixed.Meanwhile, two electric telescopic rods are located below rotatable rotating plate, can rotate flange while positioning flange, need not repeatedly positioning, greatly improve positioning fixed efficiency, to improve processing efficiency.

Description

Technical Field

[0001] This utility model provides a positioning fixture for casting processing, belonging to the field of casting processing technology, and particularly relates to a positioning fixture for grinding the mounting holes of a casting flange. Background Technology

[0002] Castings are fundamental components widely used in industrial manufacturing. Typically formed using casting processes, they offer advantages such as complex structures and the ability to be integrally molded, and are widely applied in machinery, automotive, shipbuilding, and energy industries. Flanges, as a typical ring-shaped casting, are commonly used for pipe connections, shaft fixing, or equipment sealing. They usually have multiple mounting holes distributed around their circumference for bolt connections or positioning. Due to the characteristics of the casting process, after casting, flanges often have defects such as burrs, flash, sand holes, or oxide scale on the inner walls and edges of the mounting holes. These surface imperfections can affect assembly accuracy and even prevent bolts from being installed smoothly. Therefore, in subsequent machining, the mounting holes of flanges usually need to be deburred, ground, or finely finished to ensure smooth hole walls and accurate dimensions.

[0003] However, traditional methods of grinding flange mounting holes typically involve using general-purpose clamps or three-jaw chucks to secure the flange, followed by grinding tools or drilling machines for finishing. The drawback of this method is that when grinding multiple circumferentially distributed mounting holes sequentially, the operator often needs to loosen the clamp, rotate the flange, and then reposition and re-clamp it before proceeding to the next hole. This repeated disassembly and repositioning process is inefficient. For large or heavy flanges, frequent disassembly and rotation can increase the operator's workload and even pose safety hazards. Therefore, there is an urgent need for a specialized positioning fixture that can quickly position and easily rotate the flange to improve grinding efficiency and ensure machining accuracy. Utility Model Content

[0004] The technical problem this invention aims to solve is that when grinding the mounting holes of a cast flange in sequence, it is necessary to repeatedly disassemble and install the positioning and fixing structure, which is cumbersome and reduces work efficiency.

[0005] In order to solve the above problems, the technical solution proposed by this utility model is: a positioning fixture for casting processing, including a worktable for placing a cast flange, an L-shaped column fixedly arranged on the rear side of the worktable, and a grinding device on the column that can grind the mounting holes of the flange.

[0006] A support frame is fixedly installed on the workbench, and a rotating plate is rotatably connected inside the support frame. Two centrally symmetrical electric telescopic rods are fixedly installed below the rotating plate. The working ends of the electric telescopic rods are fixedly connected to positioning components that can be inserted downward into the mounting holes to fix the flange. The grinding equipment is located directly above one of the mounting holes of the flange, and the grinding equipment is located on the rotation path of all the mounting holes on the flange that can be rotated by the rotating plate and the positioning components.

[0007] As an improvement, the support frame is equipped with a rotating motor, the working end of which is fixedly connected to a rotating shaft, and the rotating shaft is fixedly connected to the rotating plate.

[0008] As an improvement, the rotating motor can drive the rotating plate to rotate within a range of 90°.

[0009] As an improvement, the positioning component includes a pressure block and a limiting rod; the pressure block is fixedly connected to the working end of the electric telescopic rod, and the limiting rod, which can be inserted into the mounting hole, is fixedly connected below the pressure block.

[0010] As an improvement, the diameter of the limiting rod corresponds to the diameter of the mounting hole, and the diameter of the cylindrical pressure block that can be pressed onto the flange is larger than the diameter of the mounting hole.

[0011] As an improvement, the workbench is provided with a circular positioning line for positioning the flange, and the diameter of the positioning line is the same as the outer diameter of the flange.

[0012] The beneficial effects of this utility model are:

[0013] The working end of the electric telescopic rod is fixedly connected to a positioning component that can be inserted downwards into the mounting hole to fix the flange. This application uses two positioning components that insert into the mounting hole to position the flange, utilizing the two-point positioning principle to change the traditional clamping method, enabling rapid positioning and fixing. Simultaneously, the two electric telescopic rods are located below a rotatable rotating plate, allowing the flange to be rotated while being positioned, eliminating the need for repeated positioning and greatly improving positioning and fixing efficiency, thereby increasing processing efficiency. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention.

[0015] Figure 2 This is a rear view of the present invention.

[0016] Figure 3 This is a partial sectional view of the present invention.

[0017] Figure 4 This is an exploded view showing the connection between the workbench and the flange of this utility model.

[0018] 1. Workbench; 2. Support frame; 3. Rotating plate; 4. Electric telescopic rod; 5. Mounting hole; 6. Flange; 7. Column; 8. Grinding equipment; 9. Rotating motor; 10. Rotating shaft; 11. Pressure block; 12. Limiting rod; 13. Positioning line. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 , 4 As shown, this utility model provides a positioning fixture for casting processing: it includes a worktable 1 for placing a cast flange 6, an L-shaped column 7 fixedly installed on the rear side of the worktable 1, and a grinding device 8 on the column 7 for grinding the mounting holes 5 of the flange 6; the grinding device 8 is prior art, and this application only changes the position of the grinding device 8 without changing its actual structure, so its specific structure will not be described here. A circular positioning line 13 is provided on the worktable 1 for positioning the flange 6, and the diameter of the positioning line 13 is the same as the outer diameter of the flange 6, which facilitates the positioning of flanges 6 of the same specification.

[0021] like Figure 1 As shown, a support frame 2 is fixedly installed on the workbench 1, and a rotating plate 3 is rotatably connected inside the support frame 2; two centrally symmetrical electric telescopic rods 4 are fixedly installed below the rotating plate 3, and the working ends of the electric telescopic rods 4 are fixedly connected to positioning components that can be inserted downward into the mounting holes 5 to fix the flange 6; the electric telescopic rods 4 are designed to facilitate the up-and-down sliding of the positioning components. The two electric telescopic rods 4 are identical, and the working state of the two electric telescopic rods 4 is controlled by the same set of circuits, thereby ensuring the synchronicity of the two electric telescopic rods 4 in driving the positioning components.

[0022] like Figure 3 As shown, the positioning assembly includes a pressure block 11 and a limiting rod 12. The pressure block 11 is fixedly connected to the working end of the electric telescopic rod 4, and the limiting rod 12, which can be inserted into the mounting hole 5, is fixedly connected below the pressure block 11. The diameter of the limiting rod 12 corresponds to the diameter of the mounting hole 5, and the diameter of the cylindrical pressure block 11, which can press on the flange 6, is larger than the diameter of the mounting hole 5. The two limiting rods 12 can position the flange 6 using the two-point positioning principle, limiting the horizontal displacement of the flange 6. At the same time, the pressure block 11 presses on the flange 6, limiting the vertical displacement of the flange 6.

[0023] like Figure 1 , 3As shown, a rotating motor 9 is installed on the support frame 2. The working end of the rotating motor 9 is fixedly connected to a rotating shaft 10, and the rotating shaft 10 is fixedly connected to the rotating plate 3. The rotating motor 9 can drive the rotating plate 3 to rotate within a range of 90°. On the one hand, this can prevent the rotating plate 3 from rotating excessively and interfering with or colliding with the column 7 and the grinding equipment 8. On the other hand, it can prevent the power supply circuit of the electric telescopic rod 4 from getting tangled.

[0024] like Figure 2 As shown, the grinding equipment 8 is located directly above one of the mounting holes 5 of the flange 6, and the grinding equipment 8 is located on the rotation path of all the mounting holes 5 on the flange 6 that can be rotated by the rotating plate 3 and the positioning component, which can ensure that all the mounting holes 5 can be ground by the grinding equipment 8 when the flange 6 rotates.

[0025] The principle of this utility model

[0026] like Figure 4 As shown, when using this application, the flange 6 is placed at the position of the positioning line 13, and the two mounting holes 5 correspond to the positioning components of the two electric telescopic rods 4 respectively. This is the first positioning of the flange 6. After the first positioning, the two electric telescopic rods 4 are started, so that the limiting rod 12 is inserted downward into the mounting hole 5, and at the same time, the pressure block 11 presses on the flange 6, thus completing the fixing of the flange 6. At this time, the grinding equipment 8 on the column 7 is started to grind the mounting hole 5 corresponding to the grinding equipment 8. After grinding, the electric telescopic rod 4 is started, which drives the pressure block 11 to move upward a small distance, so that the pressure block 11 does not exert a clamping force on the flange 6, but the limiting rod 12 is still located in the mounting hole 5; the rotating motor 9 is started, and the rotating plate 3 is driven by the rotating shaft 10 to rotate. Under the drive of the electric telescopic rod 4 and the limiting rod 12, the flange 6 rotates in the positioning state until the next mounting hole 5 corresponds to the grinding equipment 8. The operation is quick and convenient, and the adjustment efficiency is high. After the flange 6 rotates, the pressure block 11 presses down on the flange 6 again, thus ensuring the stability of the flange 6.

[0027] It is important to note that, to avoid interference or collision between the electric telescopic rod 4 and the column 7 or grinding equipment 8, when the electric telescopic rod 4 is about to collide with the column 7 or grinding equipment 8, before the next rotation, the electric telescopic rod 4 can be started first to completely disengage the limiting rod 12 from the mounting hole 5. Then, the motor 9 can be rotated in reverse to rotate the two electric telescopic rods 4 to the initial position, aligning the positioning component with other mounting holes 5. The limiting rod 12 can then be inserted into the mounting hole 5, and the rotation of the motor 9 can drive the flange 6 to rotate. This operation has another advantage: if the mounting hole 5 into which the limiting rod 12 is inserted is not changed, the mounting hole 5 into which the limiting rod 12 is inserted will never be ground; however, by changing the mounting hole 5 into which the limiting rod 12 is inserted, it can be ensured that all mounting holes 5 are ground.

[0028] Whether the limiting rod 12 is not disengaged from the mounting hole 5 or is disengaged from the mounting hole 5, the flange 6 can be rotated in the positioned state. Therefore, there is no need to reposition after rotation, which greatly improves the efficiency of sequential grinding of the mounting hole 5 of the flange 6 casting.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A positioning fixture for casting processing, comprising a worktable (1) for placing a cast flange (6), an L-shaped column (7) fixedly disposed on the rear side of the worktable (1), and a grinding device (8) disposed on the column (7) for grinding the mounting holes (5) of the flange (6); characterized in that: A support frame (2) is fixedly installed on the workbench (1), and a rotating plate (3) is rotatably connected inside the support frame (2); two centrally symmetrical electric telescopic rods (4) are fixedly installed below the rotating plate (3), and the working end of the electric telescopic rod (4) is fixedly connected to a positioning component that can be inserted downward into the mounting hole (5) to fix the flange (6); the grinding device (8) is located directly above one of the mounting holes (5) of the flange (6), and the grinding device (8) is located on the rotation path of all the mounting holes (5) on the flange (6) that can be rotated by the rotating plate (3) and the positioning component.

2. The positioning fixture for casting processing according to claim 1, characterized in that: The support frame (2) is equipped with a rotating motor (9), and the working end of the rotating motor (9) is fixedly connected to a rotating shaft (10), and the rotating shaft (10) is fixedly connected to the rotating plate (3).

3. The positioning fixture for casting processing according to claim 2, characterized in that: The rotating motor (9) can drive the rotating plate (3) to rotate within a range of 90°.

4. The positioning fixture for casting machining according to claim 1, characterized in that: The positioning component includes a pressure block (11) and a limiting rod (12); the pressure block (11) is fixedly connected to the working end of the electric telescopic rod (4), and the limiting rod (12), which can be inserted into the mounting hole (5), is fixedly connected below the pressure block (11).

5. A positioning fixture for casting processing according to claim 4, characterized in that: The diameter of the limiting rod (12) corresponds to the diameter of the mounting hole (5), and the diameter of the cylindrical pressure block (11) that can be pressed on the flange (6) is larger than the diameter of the mounting hole (5).

6. The positioning fixture for casting machining according to claim 1, characterized in that: The workbench (1) is provided with a circular positioning line (13) for positioning and placing the flange (6), and the diameter of the positioning line (13) is the same as the outer diameter of the flange (6).

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