Multi-station cylinder head machining positioning device

Abstract

The utility model relates to the field of cylinder head machining discloses a multi -position cylinder head machining positioning device, including frock body, the top fixedly connected with the positioning frame of frock body, the outer wall of positioning frame is hinged to have the sealed door, the outer wall of positioning frame is equipped with the through slot, the outside of positioning frame is provided with the knob, the end fixedly connected with the two -way screw rod of knob, the outer wall of two -way screw rod is connected with the moving frame through the nut cover screw thread, the outer wall fixedly connected with electric push rod of moving frame, the output end of electric push rod is connected with the clamp plate through the rotary rod rotation, the inner wall fixedly connected with the pivot of clamp plate, in the utility model, through multi -position positioning frame realizes multiple cylinder head to have the positioning point simultaneously, two -way screw rod drive moving frame synchronous clamping, vacuum chuck four point adsorption and position adjustable promotion positioning precision and processing stability, have improved the efficiency and reliability of multiple cylinder head simultaneous processing.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head machining, and in particular to a multi-station cylinder head machining positioning device. Background Technology

[0002] The cylinder head, or engine cylinder head, is a key component that seals the top of the cylinder and together with the piston top surface, forms the combustion chamber. The reason why it must be positioned during machining is to establish a unified coordinate system based on the cylinder block mating surface and process holes, to ensure the relative positional accuracy of complex spatial features such as the combustion chamber, valve seats, and camshaft holes, and to prevent defects such as warping of the sealing surface, uneven valve clearance, and assembly interference caused by clamping or reference offset, which in turn affect the engine's compression ratio, thermal efficiency, and reliability.

[0003] A search revealed Chinese Patent Publication No. CN222791235U, which discloses a multi-station cylinder head machining positioning device. By setting three rows and four columns of mounting discs on the base plate, it can process twelve cylinder heads simultaneously, improving the machining efficiency of cylinder heads. Specifically, the mounting discs and positioning pins are used to place the cylinder heads horizontally, ensuring that the top surface of the cylinder head remains level. Furthermore, the mounting discs are divided into four areas and equipped with airtight holes, ensuring that the bottom surface of the cylinder head has no gap contact with the mounting surface, thus guaranteeing the levelness of the top surface of the cylinder head and ensuring the machining accuracy of the subsequent machining surfaces.

[0004] The aforementioned technical solutions suffer from several drawbacks. First, the positions of the locating pins and mounting discs are fixed, making it difficult to adapt to cylinder head workpieces of different models and sizes. Changing products requires replacing the entire set of locating elements, resulting in lengthy adjustment times and failing to meet the demands of flexible production. Second, the primary reliance on mechanical clamping force applied from the top leads to a single clamping method, which is prone to deformation. Cylinder heads are often thin-walled, complex castings with insufficient rigidity. Excessive clamping force or improper application points can easily cause microscopic deformation of the workpiece. Therefore, a multi-station cylinder head machining and locating device is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-station cylinder head machining positioning device, which aims to improve the problem that the existing multi-station cylinder head machining positioning devices lack positioning for cylinder heads of different sizes, thus reducing the reliability of subsequent processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-station cylinder head machining positioning device, comprising a tooling body, a positioning frame fixedly connected to the top of the tooling body, a sealing door hinged to the outer wall of the positioning frame, a through groove formed on the outer wall of the positioning frame, a knob provided on the outside of the positioning frame, a bidirectional lead screw fixedly connected to the end of the knob, a movable frame threadedly connected to the outer wall of the bidirectional lead screw via a nut, an electric push rod fixedly connected to the outer wall of the movable frame, a clamping plate rotatably connected to the output end of the electric push rod via a rotating rod, a rotating shaft fixedly connected to the inner wall of the clamping plate, an adjustment groove extending through the outer wall of the movable frame, a sliding seat slidably connected to the inner wall of the adjustment groove, a vacuum pump fixedly connected to the outer wall of the positioning frame, a vacuum suction cup fixedly connected to the output end of the vacuum pump via a telescopic hose, and a screw hole formed on the outer wall of the movable frame, with a bolt threadedly connected to the inner wall of the screw hole.

[0007] As a further description of the above technical solution: the outer wall of the movable frame is adapted to the inner wall of the through groove, and the end of the bidirectional lead screw away from the knob is rotatably connected to the inner wall of the positioning frame.

[0008] As a further description of the above technical solution: the top of the slide is fixedly connected to the outer wall of the vacuum suction cup, and the bolt passes through the slide and is threadedly connected to the inner wall of the slide.

[0009] As a further description of the above technical solution: the rotating shaft passes through the clamping plate and is fixedly connected to the inner wall of the clamping plate, and the end of the rotating shaft is rotatably connected to the outer wall of the moving frame.

[0010] As a further description of the above technical solution: a V-shaped notch is provided at the bottom of the end of the clamp away from the electric push rod.

[0011] As a further description of the above technical solution: the opening of the vacuum suction cup is oriented towards the side away from the positioning frame.

[0012] As a further description of the above technical solution: a limiting frame is fixedly connected to the inner wall of the positioning frame, a filter frame is provided inside the limiting frame, a filter screen is fixedly connected to the inner wall of the filter frame, and an air pump is fixedly connected to the outer wall of the sealing door.

[0013] As a further description of the above technical solution: the air inlet pipe of the air pump passes through the sealed door and is fixedly connected to the inner wall of the sealed door.

[0014] As a further description of the above technical solution: the limiting frame is C-shaped, and the inner surface of the limiting frame is adapted to the outer wall of the filter frame.

[0015] As a further description of the above technical solution: the outer wall of the filter frame is in contact with the inner wall of the positioning frame.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, multiple cylinder heads can have positioning points at the same time through a multi-station positioning frame, and the bidirectional lead screw drives the moving frame to clamp synchronously. The adjustable angle clamping plate and V-shaped notch enhance the adaptability of the cylinder head. The four-point adsorption and position adjustment of the vacuum suction cup improve the positioning accuracy and processing stability, thereby improving the efficiency and reliability of processing multiple cylinder heads at the same time.

[0018] 2. In this utility model, a detachable filter frame is securely installed by a limiting bracket, which, together with the filter screen, effectively purifies the incoming air, prevents impurities from affecting the processing quality, and the air pump and the sealing door work together to ensure a clean internal environment, improve the machining accuracy and surface quality of the cylinder head, and ensure long-term stable operation of multi-station processing. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of the main structure of a multi-station cylinder head machining positioning device proposed in this utility model;

[0020] Figure 2 This is a partial rear view schematic diagram of a multi-station cylinder head machining positioning device proposed in this utility model;

[0021] Figure 3 This is a bottom view of a partial cross-sectional view of a multi-station cylinder head machining positioning device proposed in this utility model.

[0022] Figure 4 This utility model proposes a multi-station cylinder head machining positioning device. Figure 3 Enlarged schematic diagram of region A in the middle.

[0023] Legend:

[0024] 1. Tooling body; 2. Positioning frame; 3. Through groove; 4. Knob; 5. Two-way lead screw; 6. Moving frame; 7. Electric push rod; 8. Rotary shaft; 9. Clamping plate; 10. Adjustment groove; 11. Slide; 12. Vacuum suction cup; 13. Screw hole; 14. Bolt; 15. Vacuum pump; 16. Limiting frame; 17. Filter frame; 18. Filter screen; 19. Sealing door; 20. Air pump. Detailed Implementation

[0025] 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.

[0026] Reference Figures 1-3 This utility model provides an embodiment of a multi-station cylinder head machining positioning device, including a tooling body 1. A positioning frame 2 is fixedly connected to the top of the tooling body 1. Several sets of positioning frames 2 are arranged equidistantly on the tooling body 1, which can simultaneously position multiple cylinder heads. A sealing door 19 is hinged to the outer wall of the positioning frame 2. A through groove 3 is opened on the outer wall of the positioning frame 2. A knob 4 is provided on the outside of the positioning frame 2. A bidirectional lead screw 5 is fixedly connected to the end of the knob 4. The end of the bidirectional lead screw 5 away from the knob 4 is rotatably connected to the inner wall of the positioning frame 2. A movable frame 6 is threadedly connected to the outer wall of the bidirectional lead screw 5 through a nut. When the bidirectional lead screw 5 rotates, it drives two sets of movable frames 6 to move axially along the bidirectional lead screw 5 through threaded transmission. The bidirectional lead screw can be driven by rotating one knob 4. 5. Synchronous control of the two moving frames 6 moving in opposite directions or in the same direction enables stepless adjustment of the workpiece clamping width. The outer wall of the moving frame 6 is adapted to the inner wall of the through groove 3, ensuring that the moving frame 6 will not deviate when moving in the through groove 3, thus improving the stability of movement. An electric push rod 7 is fixedly connected to the outer wall of the moving frame 6. The output end of the electric push rod 7 is rotatably connected to the clamping plate 9 through a rotating rod, so that when the electric push rod 7 extends or retracts, it can drive the clamping plate 9 to rotate around the rotating rod, thereby realizing the angle adjustment of the clamping plate 9. A V-shaped notch is opened at the bottom of the end of the clamping plate 9 away from the electric push rod 7, which can better fit the shape of the cylinder head and enhance the clamping stability of the cylinder head. A rotating shaft 8 is fixedly connected to the inner wall of the clamping plate 9. The rotating shaft 8 passes through the clamping plate 9 and is fixedly connected to the inner wall of the clamping plate 9. The end of the rotating shaft 8 is rotatably connected to the outer wall of the moving frame 6.

[0027] Reference Figures 2-4An adjustment groove 10 is provided through the outer wall of the movable frame 6. A slide block 11 is slidably connected to the inner wall of the adjustment groove 10, allowing the slide block 11 to slide flexibly along the adjustment groove 10 and change the position of the vacuum suction cup 12. A vacuum pump 15 is fixedly connected to the outer wall of the positioning frame 2. The output end of the vacuum pump 15 is fixedly connected to the vacuum suction cup 12 through a telescopic hose. Each positioning frame 2 is equipped with four sets of vacuum suction cups 12, achieving four-point positioning and adsorption at the bottom of the cylinder head. After the four adjustable vacuum suction cups 12 are started, they generate a uniform adsorption force perpendicular to the reference plane at the bottom of the cylinder head. The telescopic hose can extend and retract with the movement of the slide block 11 to ensure that the vacuum adsorption function is normal. The opening of the vacuum suction cup 12 faces the side away from the positioning frame 2. The slide 11 is fixedly connected to the outer wall of the vacuum suction cup 12. The outer wall of the moving frame 6 is provided with a screw hole 13, and the inner wall of the screw hole 13 is threaded with a bolt 14. The position of the slide 11 can be fixed by the bolt 14. By setting four independently adjustable vacuum suction cups 12, the position of the adsorption point can be flexibly adjusted according to the structural features of the bottom of different cylinder heads, such as ribs and bosses, to avoid irregular areas, ensure that the adsorption is firm and reliable, and that the pressure distribution is uniform. The bolt 14 passes through the slide 11 and is threadedly connected to the inner wall of the slide 11. Through the main suction and auxiliary clamping mode, the mechanical clamps 9 on both sides mainly provide lateral support in the horizontal direction to prevent the workpiece from moving or overturning under the action of cutting force.

[0028] Reference Figure 3 The inner wall of the positioning frame 2 is fixedly connected to the limiting frame 16, which is C-shaped to facilitate the insertion and removal of the filter frame 17 and ensure the stable installation of the filter frame 17. The inner surface of the limiting frame 16 is adapted to the outer wall of the filter frame 17. The filter frame 17 is installed inside the limiting frame 16 to facilitate the insertion and removal of the filter frame 17 and ensure the stable installation of the filter frame 17. The outer wall of the filter frame 17 is in contact with the inner wall of the positioning frame 2. The top of the positioning frame 2 is provided with an opening to allow air to enter. The inner wall of the filter frame 17 is fixedly connected to the filter screen 18, which can filter impurities in the air and prevent impurities from affecting the cylinder head processing quality. The outer wall of the sealing door 19 is fixedly connected to the air pump 20. The air inlet pipe of the air pump 20 passes through the sealing door 19 and is fixedly connected to the inner wall of the sealing door 19.

[0029] Working principle: Rotating knob 4 drives the bidirectional lead screw 5 to rotate, causing the movable frame 6, which is sleeved on the lead screw, to slide horizontally along the through groove 3 of the positioning frame 2, adjusting it to a lateral position suitable for the cylinder head size; then, the electric push rod 7 pushes the clamping plate 9 to rotate around the rotating shaft 8, using the V-shaped notch at the bottom of the clamping plate 9 to initially clamp and position the cylinder head from both sides, ensuring the initial fixation of the cylinder head in the lateral and longitudinal directions. According to the surface shape of the cylinder head, the sliding slide 11 slides along the adjustment groove 10 of the movable frame 6, moving the vacuum suction cup 12 to the position to be suctioned on the cylinder head, and screwing in the bolts. 14. Pass through the screw hole 13 and fix the slide 11. Start the vacuum pump 15 and supply air to the vacuum suction cup 12 through the telescopic hose, so that it tightly adheres to the bottom of the cylinder head, achieving secondary reinforcement and improving positioning stability. Close the sealing door 19 to form a closed processing space. Start the air pump 20. The air pump 20 delivers airflow to the inside of the positioning frame 2 through the air inlet pipe. At the same time, the filter screen 18 filters impurities in the airflow to keep the processing area clean and avoid impurities affecting the processing accuracy of the cylinder head. After processing, reverse the operation of each component to remove the cylinder head.

[0030] 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 multi-station cylinder head machining positioning device, comprising a tooling body (1), characterized in that: A positioning frame (2) is fixedly connected to the top of the tooling body (1). A sealing door (19) is hinged to the outer wall of the positioning frame (2). A through groove (3) is opened on the outer wall of the positioning frame (2). A knob (4) is provided on the outside of the positioning frame (2). A two-way lead screw (5) is fixedly connected to the end of the knob (4). A movable frame (6) is threadedly connected to the outer wall of the two-way lead screw (5) through a nut. An electric push rod (7) is fixedly connected to the outer wall of the movable frame (6). The output end of the electric push rod (7) is rotated through a rotating rod. A clamping plate (9) is connected to the movable frame (6). A rotating shaft (8) is fixedly connected to the inner wall of the clamping plate (9). An adjustment groove (10) is opened through the outer wall of the movable frame (6). A slide block (11) is slidably connected to the inner wall of the adjustment groove (10). A vacuum pump (15) is fixedly connected to the outer wall of the positioning frame (2). A vacuum suction cup (12) is fixedly connected to the output end of the vacuum pump (15) through a telescopic hose. A screw hole (13) is opened on the outer wall of the movable frame (6). A bolt (14) is threadedly connected to the inner wall of the screw hole (13).

2. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The outer wall of the movable frame (6) is adapted to the inner wall of the through groove (3), and the end of the bidirectional lead screw (5) away from the knob (4) is rotatably connected to the inner wall of the positioning frame (2).

3. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The top of the slide (11) is fixedly connected to the outer wall of the vacuum suction cup (12), and the bolt (14) passes through the slide (11) and is threadedly connected to the inner wall of the slide (11).

4. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The rotating shaft (8) passes through the clamping plate (9) and is fixedly connected to the inner wall of the clamping plate (9). The end of the rotating shaft (8) is rotatably connected to the outer wall of the moving frame (6).

5. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The clamp (9) has a V-shaped notch at the bottom of the end away from the electric push rod (7).

6. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The opening of the vacuum suction cup (12) is set to face away from the positioning frame (2).

7. The multi-station cylinder head machining positioning device according to claim 1, characterized in that: The inner wall of the positioning frame (2) is fixedly connected to the limiting frame (16), the limiting frame (16) is provided with a filter frame (17), the inner wall of the filter frame (17) is fixedly connected to a filter screen (18), and the outer wall of the sealing door (19) is fixedly connected to an air pump (20).

8. The multi-station cylinder head machining positioning device according to claim 7, characterized in that: The air inlet pipe of the air pump (20) passes through the sealing door (19) and is fixedly connected to the inner wall of the sealing door (19).

9. A multi-station cylinder head machining positioning device according to claim 7, characterized in that: The limiting frame (16) is C-shaped, and the inner surface of the limiting frame (16) is adapted to the outer wall of the filter frame (17).

10. A multi-station cylinder head machining positioning device according to claim 7, characterized in that: The outer wall of the filter frame (17) is in contact with the inner wall of the positioning frame (2).

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