A cylinder head planar milling device

Abstract

The utility model relates to cylinder cover processing technical field, specifically is a kind of cylinder cover milling plane processing device, including base, fixedly arranged workbench on the base, several first hydraulic rod and several datum positioning plate are fixedly installed on the workbench, fixedly set with pressing plate on the first hydraulic rod, recess is arranged on the pressing plate, fixedly installed with fine adjustment assembly in the recess, the both sides of workbench are provided with several positioning seat and oil cylinder seat respectively, second hydraulic rod is fixedly installed on the oil cylinder seat, fixedly set with pressing block on the second hydraulic rod, both can stable clamping cylinder cover with irregular contour, and can effectively prevent thin-walled workpiece deformation by pressure uniform distribution, ensure processing accuracy and reliability.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head machining technology, and more specifically, to a cylinder head milling surface machining device. Background Technology

[0002] Cylinder head milling is a key process in engine cylinder head manufacturing. It mainly involves high-precision planar machining of the cylinder head mating surface through milling to ensure a sealing fit with the cylinder block. This process typically uses a special fixture to fix the cylinder head and uses carbide cutting tools on a vertical or horizontal milling machine to precisely remove a thin layer of metal from the cylinder head surface, restoring it to a flat, smooth surface that meets technical standards. This ensures a reliable, leak-free seal between the cylinder head and the cylinder block, thereby guaranteeing the normal operation and stable performance of the engine.

[0003] For example, Chinese Patent Publication: A Universal Milling Fixture, Application No.: CN201720279164.1, the universal milling fixture is provided with at least three or more threaded holes for fixing the workpiece; the threaded holes for fixing the workpiece penetrate the universal milling fixture vertically, and the threaded holes for fixing the workpiece correspond to the countersunk holes of the workpiece. By making full use of the countersunk holes of the workpiece, the workpiece can be clamped in one go by directly using hexagon socket head cap screws, ensuring the dimensional requirements of the parts are met. It has high versatility, can process parts of various specifications, and is simple to operate and convenient to use.

[0004] However, in the above-mentioned technical solutions, during the milling process of the engine cylinder head, due to the complex structure of the cylinder head, there are often irregular contours, thin-walled areas, or cast blank surfaces. Currently, most of the clamps used for milling cylinder heads on the market use mechanical pressure plates or hydraulic locking. Although they can ensure rigidity, they lack adaptive adjustment capabilities, making it difficult to meet the requirements of stable clamping and anti-deformation for irregular workpieces. They are also difficult to achieve uniform clamping, which can easily lead to uneven distribution of clamping force and local stress concentration causing workpiece deformation. Irregular surfaces have poor contact, and vibration is generated during processing, affecting surface quality. Thin-walled areas lack rigidity and undergo elastic deformation after milling, reducing dimensional accuracy. Utility Model Content

[0005] The main objective of this invention is to provide a cylinder head milling surface machining device, which can effectively solve the problems in the background art of milling surface surfaces of engine cylinder heads. Due to the complex structure of the cylinder head, it often has irregular contours, thin-walled areas, or cast blank surfaces. Currently, most of the clamps used for milling surface surfaces of cylinder heads on the market adopt mechanical pressure plates or hydraulic locking. Although they can ensure rigidity, they lack adaptive adjustment capabilities, making it difficult to meet the requirements of stable clamping and anti-deformation of irregular workpieces. They are also difficult to achieve uniform clamping, which easily leads to uneven distribution of clamping force, local stress concentration causing workpiece deformation; poor contact of irregular surfaces, resulting in vibration during machining and affecting surface quality; and insufficient rigidity in thin-walled areas, causing elastic deformation after milling force and reducing dimensional accuracy.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cylinder head milling surface processing device, including a base, a worktable fixedly arranged on the base, a plurality of first hydraulic rods and a plurality of reference positioning plates fixedly installed on the worktable, a pressure plate fixedly arranged on the first hydraulic rods, a groove provided on the pressure plate, a fine adjustment component fixedly installed in the groove, a plurality of positioning seats and cylinder seats respectively arranged on both sides of the worktable, a second hydraulic rod fixedly installed on the cylinder seat, and a pressure block fixedly arranged on the second hydraulic rod.

[0007] Preferably, the groove is located on the outer wall of one side below the pressure plate.

[0008] Preferably, both the positioning seat and the cylinder seat are fixedly mounted on the workbench.

[0009] Preferably, the fine-tuning component includes a component base, on which an air groove and several sliding grooves are provided. A pressure column is slidably disposed in the sliding groove, and a sealing layer is fixedly disposed on the inner wall surface of the sliding groove.

[0010] Preferably, the air groove is connected to the slide groove, and both the slide groove and the pressure column are T-shaped.

[0011] Preferably, the end of the pressure column away from the slide groove is located outside the component base.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) When using this utility model, the workpiece is first placed on the workbench, and the position of the workpiece is positioned by the reference positioning plate. Then, the pressure block is moved towards the workpiece by the second hydraulic rod. The pressure block and the positioning seat are used to squeeze and fix the two sides of the workpiece. Then, the pressure plate is moved closer to the workpiece by the first hydraulic rod, so that the fine adjustment component contacts the workpiece. When the pressure column contacts the surface of the workpiece, dynamic balance is automatically established: the pressure column with greater contact pressure with the workpiece retracts under the reaction force, and the air pressure in the groove is reduced accordingly; while the pressure column with less contact pressure remains extended under the continuous action of air pressure. This self-adjusting mechanism makes all pressure columns eventually reach a balanced contact pressure, which can not only stably clamp the cylinder head with irregular contour, but also effectively prevent the deformation of thin-walled workpieces through uniform pressure distribution, ensuring processing accuracy and reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a cylinder head milling surface machining device according to the present invention;

[0015] Figure 2 This is a top view schematic diagram of a cylinder head milling surface machining device according to the present invention;

[0016] Figure 3 This is a schematic diagram of the fine-tuning component in a cylinder head milling surface machining device according to the present invention.

[0017] In the diagram: 1. Base; 2. Workbench; 3. First hydraulic rod; 4. Reference positioning plate; 5. Pressure plate; 6. Groove; 7. Fine-tuning component; 701. Component base; 702. Air groove; 703. Slide groove; 704. Pressure column; 705. Sealing layer; 8. Positioning seat; 9. Cylinder seat; 10. Second hydraulic rod; 11. Pressure block. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 and Figure 2As shown, a cylinder head milling surface machining device includes a base 1, a worktable 2 fixedly mounted on the base 1, a plurality of first hydraulic rods 3 and a plurality of reference positioning plates 4 fixedly mounted on the worktable 2, a pressure plate 5 fixedly mounted on the first hydraulic rods 3, a groove 6 provided on the pressure plate 5, a fine adjustment component 7 fixedly mounted in the groove 6, a plurality of positioning seats 8 and cylinder seats 9 respectively provided on both sides of the worktable 2, a second hydraulic rod 10 fixedly mounted on the cylinder seat 9, and a pressure block 11 fixedly mounted on the second hydraulic rod 10.

[0020] like Figure 3 As shown, in another embodiment of the present invention, the fine-tuning component 7 includes a component base 701, on which an air groove 702 and a plurality of sliding grooves 703 are provided. A pressure column 704 is slidably disposed in the sliding groove 703, and a sealing layer 705 is fixedly disposed on the inner wall surface of the sliding groove 703.

[0021] When the pressure column 704 contacts the workpiece surface, a dynamic balance is automatically established: the pressure column 704 with greater contact pressure with the workpiece retracts under the reaction force, correspondingly reducing the air pressure in the groove; while the pressure column 704 with less contact pressure remains extended under the continuous action of air pressure. This self-adjusting mechanism enables all pressure columns 704 to eventually reach a balanced contact pressure, which can not only stably clamp cylinder heads with irregular contours, but also effectively prevent deformation of thin-walled workpieces through uniform pressure distribution, ensuring machining accuracy and reliability. Throughout the entire working process, the air groove 702 and the groove 703 maintain a stable air pressure self-balance state, and adaptive clamping can be achieved without additional control devices.

[0022] The working principle of this cylinder head milling surface machining device:

[0023] In use, the workpiece is first placed on the worktable 2, and the position of the workpiece is positioned using the reference positioning plate 4. Then, the pressure block 11 is moved towards the workpiece by the second hydraulic rod 10. The pressure block 11 and the positioning seat 8 are used to press and fix the workpiece on both sides. Then, the pressure plate 5 is moved closer to the workpiece by the first hydraulic rod 3, so that the fine adjustment component 7 contacts the workpiece. When the pressure column 704 contacts the workpiece surface, a dynamic balance is automatically established: the pressure column 704 with greater contact pressure with the workpiece retracts under the reaction force, correspondingly reducing the air pressure in the groove; while the pressure column 704 with less contact pressure remains extended under the continuous action of air pressure. This self-adjusting mechanism enables all pressure columns 704 to eventually reach a balanced contact pressure, which can not only stably clamp the cylinder head with irregular contours, but also effectively prevent the deformation of thin-walled workpieces through uniform pressure distribution, ensuring processing accuracy and reliability.

[0024] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A cylinder head face-milling device comprising a base (1), characterized in that: A workbench (2) is fixedly installed on the base (1). Several first hydraulic rods (3) and several reference positioning plates (4) are fixedly installed on the workbench (2). A pressure plate (5) is fixedly installed on the first hydraulic rod (3). A groove (6) is provided on the pressure plate (5). A fine adjustment component (7) is fixedly installed in the groove (6). Several positioning seats (8) and cylinder seats (9) are respectively provided on both sides of the workbench (2). A second hydraulic rod (10) is fixedly installed on the cylinder seat (9). A pressure block (11) is fixedly installed on the second hydraulic rod (10).

2. The cylinder head milling surface machining device according to claim 1, characterized in that: The groove (6) is located on the outer wall of one side below the pressure plate (5).

3. The cylinder head milling surface machining device according to claim 2, characterized in that: The positioning seat (8) and the cylinder seat (9) are both fixedly installed on the workbench (2).

4. The cylinder head milling surface machining device according to claim 3, characterized in that: The fine-tuning component (7) includes a component base (701), on which an air groove (702) and several sliding grooves (703) are provided. A pressure column (704) is slidably provided in the sliding groove (703), and a sealing layer (705) is fixedly provided on the inner wall surface of the sliding groove (703).

5. The cylinder head milling surface machining device according to claim 4, characterized in that: The air groove (702) is connected to the slide groove (703), and both the slide groove (703) and the pressure column (704) are T-shaped.

6. The cylinder head milling surface machining device according to claim 5, characterized in that: The end of the pressure column (704) away from the slide groove (703) is located outside the component base (701).

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