Positioning tool for hole milling of cylinder cover

Abstract

The utility model discloses a positioning tool for hole milling of a cylinder cover, and belongs to the technical field of machining. Comprising a tool base and a positioning bottom plate rotationally connected to the tool base, and the positioning bottom plate can rotate to any rotation angle and can stop at any rotation angle; a positioning plate capable of being embedded in the end of the cylinder cover is arranged on the positioning bottom plate, a profiling positioning part capable of being embedded in the end of the cylinder cover is arranged on the positioning plate, a positioning screw capable of penetrating through the cylinder cover is arranged on the positioning plate, and a limiting pressing plate capable of abutting against the cylinder cover is movably arranged on the positioning screw in a penetrating mode. The positioning screw rod is in threaded connection with a nut which can abut against the limiting pressing plate; the positioning tool for hole milling of the cylinder cover can effectively solve the problem that an existing positioning tool needs to repeatedly adjust the fixing angle of the cylinder cover for multiple times.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of machining, especially relate to a positioning tool for cylinder cover hole milling. BACKGROUND

[0002] In the related field of engine manufacturing, the cylinder cover is usually made by casting process. These cast cylinder covers need to be milled on specific hole positions in the subsequent processing to meet the precision requirements of engine assembly and operation.

[0003] However, due to the large number of hole positions on the cylinder cover that need to be milled and the variable angles, the traditional positioning tool can only fix the cylinder cover at a certain fixed angle. When multiple inclined holes or holes with special angles on the cylinder cover need to be milled, the fixed angle of the cylinder cover needs to be adjusted manually multiple times. This operation not only increases the labor intensity of the operator, but also greatly affects the processing efficiency, making it difficult to meet the efficient production requirements.

[0004] Therefore, there is an urgent need for a positioning tool for cylinder cover hole milling that can meet the multi-angle quick positioning of the cylinder cover. SUMMARY

[0005] The utility model aims at overcoming the deficiencies in the prior art and providing a positioning tool for cylinder cover hole milling, which can effectively overcome the problem of repeatedly adjusting the fixed angle of the cylinder cover with the existing positioning tool.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a positioning tool for cylinder cover hole milling, which comprises a tool base and a positioning base plate rotatably connected to the tool base. The positioning base plate can be rotated to any rotation angle and can be stopped at any rotation angle.

[0007] Among them, the positioning base plate is provided with a positioning disc that can be embedded in the end of the cylinder cover. The positioning disc is provided with a profiling positioning part that can be embedded in the end of the cylinder cover. The positioning disc is provided with a positioning screw that can penetrate the cylinder cover. The positioning screw is movably provided with a limiting pressure plate that can abut against the cylinder cover. The positioning screw is threadedly connected with a nut that can abut against the limiting pressure plate.

[0008] Optionally, the tool base is provided with a limiting base. The positioning base plate is provided with a plurality of limiting holes. The limiting base is bolted with a limiting screw that can be inserted into the limiting hole.

[0009] Optionally, the positioning base plate is provided with a scale line in a circumferential array along its rotation axis. The tool base is provided with an indicating arrow that can indicate the scale line.

[0010] Optionally, the positioning disc is provided with a fool-proof positioning pin capable of being inserted into the end of the cylinder cover.

[0011] Optionally, the positioning base plate is provided with a supporting seat capable of being supported on the outer periphery of the cylinder cover.

[0012] Optionally, the limiting pressing plate is provided with a U-shaped notch, and the limiting pressing plate is movably connected with the positioning screw through the U-shaped notch.

[0013] Optionally, the limiting pressing plate is in a disc shape or a cross shape.

[0014] Optionally, one side of the limiting pressing plate, which abuts against the cylinder cover, is provided with a rubber pad.

[0015] Compared with the prior art, the cylinder cover can be precisely positioned by closely fitting the profiling positioning part on the positioning disc with the end of the cylinder cover, the positional deviation of the cylinder cover in the positioning process is reduced, and the precision foundation for the hole milling of the cylinder cover is laid. Meanwhile, the positioning base plate can be rotated to any angle and stopped, which provides great flexibility for the angle adjustment of the cylinder cover in the processing process. In the face of different hole positions that need to be processed on the cylinder cover, the complex repeated clamping and the replacement of different angle tooling are not needed, the processing time is effectively reduced, and the processing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in connection with the drawings and embodiments.

[0017] Figure 1 is the structure schematic view when part of the cylinder cover is placed on the positioning tool for cylinder cover hole milling in the preferred embodiment of the utility model;

[0018] Among them, 1, tool base; 2, positioning base plate; 201, limiting hole; 202, supporting seat; 3, positioning disc; 301, profiling positioning part; 302, fool-proof positioning pin; 4, positioning screw; 5, limiting pressing plate; 501, U-shaped notch; 6, nut; 7, limiting base; 8, limiting screw. DETAILED DESCRIPTION

[0019] The utility model will be further explained in connection with the drawings and embodiments.

[0020] It should be noted that if the embodiment involves directional indications (such as up, down, bottom, top, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly. The terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more features. Unless otherwise specified and limited, the terms "set", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Embodiment one

[0021] As shown in Figure 1 A kind of positioning tool for cylinder head hole milling processing, including tool base 1 and the positioning base plate 2 of rotation connection on tool base 1, in the present technical solution, tool base 1 can be installed on the workbench of multi-axis numerical control machining center by bolt etc. fastener. And work base can be provided with multiple positioning base plate 2, so that operator can clamp multiple cylinder heads in single time, to improve the efficiency of milling hole. And in the present technical solution, positioning base plate 2 can be used as the reference surface of cylinder head positioning, and positioning base plate 2 can be rotated to any rotation angle, and can be at any rotation angle stagnation, so that the cylinder head that can be fixed on positioning base plate 2 can be rotated to different angles, to facilitate multi-axis numerical control machining center to carry out hole milling operation on different hole positions of cylinder head.

[0022] As shown in Figure 1 Positioning cylinder head on positioning base plate 2, positioning base plate 2 is provided with positioning disc 3 that can be embedded in the end of cylinder head, positioning disc 3 is provided with profiled positioning part 301 that can be embedded in the end of cylinder head, positioning disc 3 is provided with positioning screw 4 that can be penetrated through cylinder head, positioning screw 4 is movably provided with limiting pressing plate 5 that can abut on cylinder head, and positioning screw 4 is threadedly connected with nut 6 that can abut on limiting pressing plate 5. That is, cylinder head can be clamped between positioning disc 3 and limiting pressing plate 5, and by tightly fixing nut 6 on positioning screw 4, cylinder head can be fixed on positioning base plate 2.

[0023] Specifically, in the technical solution, the profiling positioning part 301 on the positioning disc 3 can be tightly fitted with the end of the cylinder head to achieve accurate positioning of the cylinder head, reduce the positional deviation of the cylinder head during positioning, and lay a precision foundation for the hole milling of the cylinder head. The positioning base plate 2 which can rotate to any angle and stop can provide great flexibility for angle adjustment of the cylinder head during processing. In the face of different hole positions that need to be processed on the cylinder head, complex repeated clamping is not required, and different angle tooling does not need to be replaced, which can effectively reduce processing time and improve processing efficiency.

[0024] As mentioned above, the positioning base plate 2 can be stopped at any rotation angle through the high-precision rotation equipment of the hollow rotating platform in the prior art, that is, a hollow rotating platform can be arranged between the positioning base plate 2 and the tooling base 1 to drive the positioning base plate 2 to rotate. In the technical solution, to reduce the production cost, a bearing can be connected between the positioning base plate 2 and the tooling base 1 to ensure the rotation accuracy of the positioning base plate 2. At the same time, to enable the positioning base plate 2 to be fixed and stopped at multiple angles convenient for hole milling, as shown in Figure 1 As shown, a limiting base 7 can be arranged on the tooling base 1, a plurality of limiting holes 201 are arranged on the positioning base plate 2, a limiting screw 8 capable of being inserted into the limiting hole 201 is bolted on the limiting base 7, and one end of the limiting screw 8 can be inserted into the limiting hole 201 on the positioning base plate 2 by twisting the limiting screw 8 to fix the position of the positioning base plate 2. The position of the limiting hole 201 on the positioning base plate 2 can be selected according to the position of the cylinder head to be positioned. The structure can greatly reduce the production cost, and also enable the cylinder head to be adjusted at multiple angles on the positioning tooling, meeting the use requirements of the positioning tooling for hole milling of the cylinder head in the technical solution.

[0025] Further, to facilitate the operator to adjust the rotation angle of the positioning base plate 2, as shown in Figure 1 As shown, a plurality of scale lines arranged in a circumferential array are arranged on the positioning base plate 2 along the rotation axis, and an indicating arrow capable of indicating the scale lines is arranged on the tooling base 1.

[0026] Further, as shown in Figure 1 To position the initial position of the cylinder head on the positioning base plate 2, a foolproof positioning pin 302 capable of being inserted into the end of the cylinder head is arranged on the positioning disc 3. At the same time, to facilitate the operator to butt the end of the cylinder head with the positioning disc 3, a supporting seat 202 capable of supporting the outer periphery of the cylinder head is arranged on the positioning base plate 2.

[0027] Furthermore, in this technical solution, to facilitate the operator in removing the cylinder head from the positioning fixture used for milling the cylinder head hole, the limiting pressure plate 5 is provided with a U-shaped groove 501. The limiting pressure plate 5 can be movably engaged with the positioning screw 4 through the U-shaped groove 501, that is, the limiting pressure plate can be removed from the positioning screw 4 without completely unscrewing the nut 6 from the positioning screw 4, thereby facilitating the operator in removing the cylinder head. Example 2

[0028] like Figure 1 As shown, based on Embodiment 1, both ends of the cylinder head can be fitted with the contour positioning part 301 on the positioning plate 3. In order to adapt to the different shapes of the two ends of the end cover, the limiting pressure plate 5 is disc-shaped or cross-shaped. At the same time, in order to prevent the limiting pressure plate 5 from damaging the surface of the cylinder head end, a rubber pad is provided on the side of the limiting pressure plate 5 that abuts against the cylinder head.

[0029] Working Principle: The tooling base 1 can be installed on the worktable of a multi-axis CNC machining center using fasteners such as bolts. Then, the operator passes the cylinder head through the positioning screw 4, ensuring one end of the cylinder head is tightly engaged with the contour positioning part 301 on the positioning plate 3. Next, the limiting pressure plate 5, equipped with a U-shaped groove 501, is engaged with the positioning screw 4, allowing the limiting pressure plate 5 to abut against the other end of the cylinder head. Then, the nut 6 on the positioning screw 4 is tightened, pressing the limiting pressure plate 5 firmly onto the cylinder head, thus fixing the cylinder head to the positioning base plate 2. Subsequently, according to the required milling hole position on the cylinder head, the angle of the positioning base plate 2 relative to the tooling base 1 is adjusted, and the limiting screw 8 is tightened to engage with the limiting hole 201, thus positioning the cylinder head relative to the tooling base 1. The cylinder head can then be milled using the multi-axis CNC machining center. Once the cylinder head has completed the milling operation for that hole, the angle of the positioning base plate 2 can be readjusted by releasing the connection between the limiting screw 8 and the limiting hole 201 to meet the milling requirements of another hole. Similarly, by tightening the limiting screw 8 again to connect it to the limiting hole 201, the position of the cylinder head can be repositioned. Using the positioning fixture for cylinder head milling in this technical solution eliminates the need for complex repeated clamping and changing fixtures at different angles, effectively reducing processing time and improving processing efficiency.

[0030] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A positioning tool for cylinder head boring, characterized by: Including tool base (1) and positioning base plate (2) is rotatably connected to the tool base (1), the positioning base plate (2) can be rotated to any rotation angle, and can be stopped at any rotation angle; Wherein, the positioning base plate (2) is provided with a positioning disc (3) capable of being embedded in the end of the cylinder cover, the positioning disc (3) is provided with a profiling positioning part (301) capable of being embedded in the end of the cylinder cover, and the positioning disc (3) is provided with a positioning screw (4) capable of penetrating the cylinder cover, the positioning screw (4) is movably provided with a limiting pressing plate (5) capable of abutting on the cylinder cover, and the positioning screw (4) is threadedly connected with a nut (6) capable of abutting on the limiting pressing plate (5).

2. The cylinder head boring positioning tooling according to claim 1, characterized in that: The tool base (1) is provided with a limiting base (7), the positioning base plate (2) is provided with a plurality of limiting holes (201), and the limiting base (7) is bolted with a limiting screw (8) capable of being inserted into the limiting hole (201).

3. The cylinder head boring positioning tooling of claim 1, wherein: The positioning base plate (2) is provided with a scale line arranged in a circumferential array along the rotation axis thereof, and the tool base (1) is provided with an indicating arrow capable of indicating the scale line.

4. The cylinder head boring positioning tooling of claim 1, wherein: The positioning disc (3) is provided with a foolproof positioning pin (302) capable of being inserted into the end of the cylinder cover.

5. The cylinder head boring positioning tooling of claim 1, wherein: The positioning base plate (2) is provided with a supporting seat (202) capable of supporting the outer periphery of the cylinder cover.

6. The cylinder head boring positioning tooling of claim 1, wherein: The limiting pressing plate (5) is provided with a U-shaped notch (501), and the limiting pressing plate (5) can be movably connected with the positioning screw (4) through the U-shaped notch (501).

7. The cylinder head boring positioning tooling of claim 1, wherein: The limiting pressing plate (5) is disc-shaped or cross-shaped.

8. The cylinder head boring positioning tooling of claim 1, wherein: The limiting pressing plate (5) is provided with a rubber pad on the side abutting against the cylinder cover.

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