A novel cylinder head LGI valve hole machining alignment fixture

Abstract

This utility model relates to the field of cylinder head LGI valve hole machining technology, and discloses a novel cylinder head LGI valve hole machining alignment fixture, including a main fixture frame. An adjustment assembly is provided on the surface of the main fixture frame, the adjustment assembly including an adjustment motor. The outer wall of the adjustment motor is fixedly connected to the outer surface of the main fixture frame, and an adjustment frame is fixedly connected to the output end of the adjustment motor. A rotating shaft is fixedly connected to the side of the adjustment frame away from the adjustment motor, and the outer side of the rotating shaft is rotatably connected to the inner wall of the adjustment motor. A sliding groove is provided on the inner surface of the adjustment motor. In this utility model, the adjustment assembly, driven by the adjustment motor, rotates the adjustment frame, which, in conjunction with the electric slider in the sliding groove, moves two mirror-shaped adjustment clamps. Protective clamping pads symmetrically hold the workpiece, achieving precise adjustment and stable clamping of the machined component, avoiding clamping damage, ensuring uniform force on the component, and improving machining positioning accuracy and workpiece surface protection.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head LGI valve hole processing technology, and in particular to a novel cylinder head LGI valve hole processing alignment tooling. Background Technology

[0002] In the field of automotive engine cylinder head machining, cylinder head valve bore machining is one of the key processes in engine manufacturing. It includes the machining of valve seat cone surfaces and guide holes. The machining accuracy of LGI valve bores directly affects the engine's fuel injection efficiency and emission performance.

[0003] The machining of LGI valve holes involves the use of a cylinder head valve hole alignment fixture, which is a tool used to ensure that the valve holes on the cylinder head can be machined accurately.

[0004] Existing cylinder head LGI valve hole machining alignment fixtures can achieve basic positioning functions, but their adjustment mechanisms mostly rely on manual operation, making it difficult to achieve the 0.05mm positioning requirements needed for high-precision machining. The rigid clamping structure lacks protective design, making it easy to scratch the cylinder head surface and affect product quality. Furthermore, the fixture positioning components are fixed and cannot adapt to changes in the number and position of valve holes in different cylinder head models, resulting in poor versatility. Frequent fixture changes not only reduce production efficiency but also significantly increase production costs. Therefore, a new type of cylinder head LGI valve hole machining alignment fixture is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a novel cylinder head LGI valve hole machining alignment fixture, which aims to solve the problems in the prior art where the adjustment mechanism mostly relies on manual operation, making it difficult to achieve the 0.05mm positioning requirements required for high-precision machining; the rigid clamping structure lacks protective design, making it easy to scratch the cylinder head surface and affect product quality; and the fixture positioning components are fixed, unable to adapt to the changes in the number and position of valve holes of different cylinder head models, resulting in poor versatility. Frequent fixture replacement not only reduces production efficiency but also significantly increases production costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel cylinder head LGI valve hole machining and alignment fixture, comprising a fixture main frame, wherein an adjustment component is provided on the surface of the fixture main frame;

[0007] The adjustment assembly includes an adjustment motor, the outer wall of which is fixedly connected to the outer surface of the main frame of the tooling. An adjustment frame is fixedly connected to the output end of the adjustment motor. A rotating shaft is fixedly connected to the side surface of the adjustment frame away from the adjustment motor. The outer side of the rotating shaft is rotatably connected to the inner wall of the adjustment motor. A sliding groove is provided on the inner surface of the adjustment motor. An electric slider is slidably connected inside the sliding groove. An adjustment clamp is fixedly connected to the upper surface of the electric slider. An adjustment threaded rod is rotatably connected to the inner wall of one side of the adjustment frame. A guide rod is fixedly connected to the inner wall of the other side of the adjustment frame. A valve hole positioning assembly is provided between the guide rods.

[0008] As a further description of the above technical solution:

[0009] The slide rail is provided in two parts, and the two slide rails are mirror images of each other along the central axis of the adjusting frame.

[0010] As a further description of the above technical solution:

[0011] The adjustment clamps are provided in two parts, and the two adjustment clamps are mirror images of each other along the central axis of the adjustment frame.

[0012] As a further description of the above technical solution:

[0013] A protective pad is fixedly connected to the inner side of the adjusting clamp.

[0014] As a further description of the above technical solution:

[0015] An adjustment handwheel is installed at the top end of the adjusting threaded rod, extending through to the upper surface of the adjusting frame.

[0016] As a further description of the above technical solution:

[0017] The valve hole positioning assembly includes a positioning frame, with one inner wall of the positioning frame threadedly connected to the outside of the adjusting threaded rod, and the other inner wall of the positioning frame movably connected to the outside of the guide rod.

[0018] As a further description of the above technical solution:

[0019] The upper surface of the positioning frame is provided with a disassembly groove, the upper surface of the positioning frame is provided with a positioning lock hole, and the front of the positioning frame is provided with an adjustment groove.

[0020] As a further description of the above technical solution:

[0021] A machining positioning seat is slidably connected between the disassembly slot and the adjustment slot. A machining positioning hole is provided on the upper surface of the machining positioning seat. A telescopic locking pin is fixedly connected to the upper surface of the machining positioning seat. A handle is fixedly connected to the front of the machining positioning seat. The outer side of the handle is slidably connected to the inner side of the adjustment slot, and the telescopic end of the telescopic locking pin is movably engaged with the inner side of the positioning lock hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by adjusting the component, the adjusting motor drives the adjusting frame to rotate, and the electric slider in the slide groove drives the two mirror adjusting clamps to move. The protective clamping pads symmetrically clamp the workpiece, so as to achieve precise adjustment and stable clamping of the processing part, avoid clamping damage, ensure uniform force on the part, and improve the processing positioning accuracy and workpiece surface protection effect.

[0024] 2. In this utility model, the valve hole positioning assembly utilizes the cooperation of the adjusting threaded rod and the guide rod to achieve precise axial movement and guidance of the positioning frame. The disassembly slot allows for easy replacement of the machining positioning seat, adapting to the machining of different numbers of valve holes. The positioning locking hole and telescopic locking pin lock the position of the machining positioning seat. The adjustment slot and handle enable fine-tuning of the position. The machining positioning hole provides a precise positioning reference, ensuring accurate valve hole machining position and improving machining accuracy and tooling versatility. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a novel cylinder head LGI valve hole machining and alignment fixture proposed in this utility model.

[0026] Figure 2 A schematic diagram of the adjustment structure of the adjustment component of a novel cylinder head LGI valve hole machining alignment tooling proposed in this utility model.

[0027] Figure 3 This utility model presents a partial cross-sectional and disassembled structural diagram of the adjustment component of a novel cylinder head LGI valve hole machining and alignment fixture.

[0028] Figure 4 This is a schematic diagram showing the disassembled structure of the adjustment component of a novel cylinder head LGI valve hole machining and alignment tooling proposed in this utility model.

[0029] Legend:

[0030] 1. Main frame of the tooling; 2. Adjustment assembly; 21. Adjustment motor; 22. Adjustment frame; 23. Rotary shaft; 24. Slide groove; 25. Electric slider; 26. Adjustment clamp; 27. Protective clamp; 28. Adjustment threaded rod; 29. ​​Guide rod; 3. Valve hole positioning assembly; 31. Positioning frame; 32. Disassembly and assembly groove; 33. Positioning lock hole; 34. Adjustment groove; 35. Machining positioning seat; 36. Machining positioning hole; 37. Handle; 38. Telescopic locking pin. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3This utility model provides an embodiment of a novel cylinder head LGI valve hole machining and alignment fixture, comprising a main fixture frame 1. The main fixture frame 1 serves as the basic support structure for the entire fixture, providing an installation carrier and stable working platform for other components. An adjustment assembly 2 is provided on the surface of the main fixture frame 1. The adjustment assembly 2 is a key component for adjusting the position of the machined components, ensuring machining accuracy. The adjustment assembly 2 includes an adjustment motor 21, which provides a power source for the rotation of the adjustment frame 22. Precise control of the adjustment motor 21 ensures the accuracy and stability of the adjustment action. The outer wall of the adjustment motor 21 is fixedly connected to the outer surface of the main fixture frame 1. This fixed connection method ensures that the adjustment motor 21 is securely mounted on the main fixture frame. To prevent shaking during operation from affecting adjustment accuracy, an adjustment frame 22 is fixedly connected to the output end of the adjustment motor 21. The power of the adjustment motor 21 is transmitted to the adjustment frame 22 through the output end, driving the adjustment frame 22 to rotate, thereby adjusting the position of related components. A rotating shaft 23 is fixedly connected to the surface of the adjustment frame 22 away from the adjustment motor 21. The rotating shaft 23 provides support and a rotation axis for the rotation of the adjustment frame 22, enabling the adjustment frame 22 to rotate stably around the axis. The outer side of the rotating shaft 23 is rotatably connected to the inner wall of the adjustment motor 21. This connection method ensures that the rotating shaft 23 can rotate flexibly inside the adjustment motor 21, while restricting its axial movement, ensuring the stability of the rotation of the adjustment frame 22. The inner surface of the adjustment motor 21 is provided with a sliding groove 24, which is used for... The electric slider 25 is provided with a track to guide its movement along a specific direction, thereby adjusting the position of the component. Two slide grooves 24 are provided, mirror-shaped along the central axis of the adjusting frame 22. The electric slider 25 is slidably connected inside the slide grooves 24. An adjusting clamp 26 is fixedly connected to the upper surface of the electric slider 25. The adjusting clamp 26 is used to clamp the workpiece. Precise adjustment of the component's position can be achieved by driving the electric slider 25. Two adjusting clamps 26 are provided, mirror-shaped along the central axis of the adjusting frame 22. The two mirror-shaped adjusting clamps 26 can symmetrically clamp the component, ensuring uniform force distribution during processing and improving processing accuracy. Protective elements are fixedly connected to the inner side of the adjusting clamp 26. The clamping pad 27 and protective clamping pad 27 can prevent the adjusting clamp 26 from damaging the surface of the component when clamping the component, thus protecting the component. An adjusting threaded rod 28 is rotatably connected to the inner wall of one side of the adjusting frame 22. The top end of the adjusting threaded rod 28 extends through to the upper surface of the adjusting frame 22 and is equipped with an adjusting handwheel. A guide rod 29 is fixedly connected to the inner wall of the other side of the adjusting frame 22. The adjusting handwheel rotates the adjusting threaded rod 28, so that the valve hole positioning assembly 3 can be adjusted along the height direction of the guide rod 29 for pressing and positioning the upper surface of cylinder heads of different volumes. The valve hole positioning assembly 3 is set between the guide rods 29. The valve hole positioning assembly 3 is the core component for achieving precise machining and positioning of the LGI valve hole of the cylinder head, ensuring the accuracy of the machining position.

[0033] Reference Figure 1 , Figure 2 and Figure 4 The valve hole positioning assembly 3 includes a positioning frame 31, which is the main structure of the valve hole positioning assembly 3. The positioning frame 31 provides the mounting base for other components and achieves position adjustment under the action of the adjusting threaded rod 28 and the guide rod 29. One side of the inner wall of the positioning frame 31 is threadedly connected to the outer side of the adjusting threaded rod 28. Through this threaded connection, when the adjusting threaded rod 28 rotates, it can drive the positioning frame 31 to move along the axis of the adjusting threaded rod 28, achieving precise adjustment of the position of the positioning frame 31. The other side of the inner wall of the positioning frame 31 is movably connected to the outer side of the guide rod 29. The guide rod 29 provides guidance for the movement of the positioning frame 31, ensuring that the positioning frame 31 does not shift during movement, making the positioning more accurate. The upper surface of the frame 31 is provided with a disassembly groove 32, which facilitates the installation and disassembly of the machining positioning seat 35, making it easy to replace or maintain the machining positioning seat 35 to meet the needs of machining different numbers of LGI valve holes. The upper surface of the positioning frame 31 is provided with a positioning locking hole 33, which cooperates with the telescopic latch 38 to lock the position of the machining positioning seat 35, preventing the machining positioning seat 35 from moving during the machining process and ensuring machining accuracy. The front of the positioning frame 31 is provided with an adjustment groove 34, which provides space for the movement of the handle 37 and the machining positioning seat 35. The operator can move the handle 37 to drive the machining positioning seat 35 to slide in the adjustment groove 34, thereby realizing the movement of the machining positioning seat. For fine-tuning at position 35, a machining positioning seat 35 is slidably connected between the disassembly / assembly slot 32 and the adjustment slot 34. The machining positioning seat 35 is used to determine the machining position of the valve hole. By sliding within the disassembly / assembly slot 32 and the adjustment slot 34, its position can be adjusted and it can be installed or disassembled. A machining positioning hole 36 is opened on the upper surface of the machining positioning seat 35. The machining positioning hole 36 provides a positioning reference for machining the LGI valve hole in the cylinder head, ensuring that the position of the machined valve hole is accurate. A telescopic locking pin 38 is fixedly connected to the upper surface of the machining positioning seat 35. The machining positioning seat 35 is used to determine the machining position of the valve hole. By sliding within the disassembly / assembly slot 32 and the adjustment slot 34, its position can be adjusted and it can be installed or disassembled. The front of the machining positioning seat 35. A handle 37 is fixedly connected, which allows the operator to manually move the machining positioning seat 35. By sliding within the adjustment groove 34, the position of the machining positioning seat 35 can be quickly adjusted. The outer side of the handle 37 is slidably connected to the inner side of the adjustment groove 34. This sliding connection allows the handle 37 to move flexibly within the adjustment groove 34, thereby moving the machining positioning seat 35 and achieving precise position adjustment. The telescopic end of the telescopic locking pin 38 is movably engaged with the inner side of the positioning lock hole 33. When the position of the machining positioning seat 35 is adjusted to the correct position, the telescopic end of the telescopic locking pin 38 engages with the positioning lock hole 33, firmly locking the machining positioning seat 35 to prevent displacement during machining and ensure the machining accuracy of the valve hole.

[0034] Working principle: When the LGI valve hole of the cylinder head needs to be machined and aligned, the cylinder head is first placed on the adjusting frame 22. Then, the electric slider 25 slides in the slide groove 24, driving the two mirror-set adjusting clamps 26 to move synchronously. The protective clamping pads 27 symmetrically clamp the cylinder head to ensure that the part is subjected to uniform force during the machining process, improve the machining accuracy, and the adjusting motor 21 can be started. Its output end drives the adjusting frame 22 to rotate around the rotating shaft 23 to achieve the initial adjustment of the machining angle. The precise control of the adjusting motor 21 ensures the accuracy and stability of the adjustment action.

[0035] Next, turn the adjusting handwheel to drive the adjusting threaded rod 28 to rotate, so that the positioning frame 31 moves along the height direction of the guide rod 29 to press and position the upper surface of cylinder heads of different volumes. According to specific processing requirements, the operator slides the handle 37 in the adjusting groove 34 to drive the processing positioning seat 35 to move in the positioning frame 31, so as to realize the rapid adjustment and fine adjustment of the position of the processing positioning seat 35. The processing positioning hole 36 on the processing positioning seat 35 provides a positioning reference for the processing of the cylinder head LGI valve hole.

[0036] Once the machining positioning seat 35 is positioned, the telescopic end of the telescopic pin 38 engages with the positioning locking hole 33, firmly locking the machining positioning seat 35 to prevent displacement during machining and ensuring the machining accuracy of the valve hole. Through the coordinated work of the above components, this utility model can achieve precise machining positioning of the cylinder head LGI valve hole, meeting the machining requirements of different quantities and positions of LGI valve holes.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel cylinder head LGI valve hole machining and alignment fixture, comprising a main fixture frame (1), characterized in that: The surface of the tooling main frame (1) is provided with an adjustment component (2); The adjustment assembly (2) includes an adjustment motor (21). The outer wall of the adjustment motor (21) is fixedly connected to the outer surface of the main frame (1) of the tooling. An adjustment frame (22) is fixedly connected to the output end of the adjustment motor (21). A rotating shaft (23) is fixedly connected to the side surface of the adjustment frame (22) away from the adjustment motor (21). The outer side of the rotating shaft (23) is rotatably connected to the inner wall of the adjustment motor (21). A sliding groove (24) is provided on the inner surface of the adjustment motor (21). An electric slider (25) is slidably connected inside the sliding groove (24). An adjustment clamp (26) is fixedly connected to the upper surface of the electric slider (25). An adjustment threaded rod (28) is rotatably connected to the inner wall of one side of the adjustment frame (22). A guide rod (29) is fixedly connected to the inner wall of the other side of the adjustment frame (22). A valve hole positioning assembly (3) is provided between the guide rod (29) and the guide rod (29).

2. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 1, characterized in that: Two slides (24) are provided, and the two slides (24) are mirrored along the central axis of the adjusting frame (22).

3. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 1, characterized in that: Two adjustment clamps (26) are provided, and the two adjustment clamps (26) are mirror images of the central axis of the adjustment frame (22).

4. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 3, characterized in that: A protective pad (27) is fixedly connected to the inner side of the adjusting clamp (26).

5. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 1, characterized in that: The top end of the adjusting threaded rod (28) extends through to the upper surface of the adjusting frame (22) and is fitted with an adjusting handwheel.

6. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 1, characterized in that: The valve hole positioning assembly (3) includes a positioning frame (31), the inner wall of one side of the positioning frame (31) is threaded to the outer side of the adjusting thread rod (28), and the inner wall of the other side of the positioning frame (31) is movably connected to the outer side of the guide rod (29).

7. The novel cylinder head LGI valve hole machining and alignment fixture according to claim 6, characterized in that: The upper surface of the positioning frame (31) is provided with a disassembly groove (32), the upper surface of the positioning frame (31) is provided with a positioning lock hole (33), and the front of the positioning frame (31) is provided with an adjustment groove (34).

8. A novel cylinder head LGI valve hole machining and alignment fixture according to claim 7, characterized in that: A machining positioning seat (35) is slidably connected between the disassembly groove (32) and the adjustment groove (34). A machining positioning hole (36) is provided on the upper surface of the machining positioning seat (35). A telescopic latch (38) is fixedly connected to the upper surface of the machining positioning seat (35). A handle (37) is fixedly connected to the front of the machining positioning seat (35). The outer side of the handle (37) is slidably connected to the inner side of the adjustment groove (34), and the telescopic end of the telescopic latch (38) is movably engaged with the inner side of the positioning lock hole (33).

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