A positioning structure for engine cylinder head machining

Abstract

The utility model relates to a kind of positioning structure for engine cylinder cover processing, including installation plate and grinding table being set on processing machine tool, the installation plate and grinding table rotation installation, grinding table is provided with the positioning structure for fixing cylinder cover blank, the positioning structure includes two clamps for resisting the inner wall of cylinder cover blank, and two clamps symmetrically distributed sliding installation on grinding table.This positioning structure for engine cylinder cover processing, grinding table and installation plate rotation cooperation, realize blank body overturn without disassembly, avoid the positioning reference deviation caused by repeated fixation, symmetric clamp from inner wall and resist blank, fixed more stable, and rubber pad can avoid scratch blank, adjusting piece is cooperated with connecting column by the arc slot of adjusting disc, realize two clamps synchronous and move towards each other, guarantee even force when fixed, realize one-time fixation and multi-surface processing, ensure that each surface positioning reference is consistent, improve polishing quantity uniformity.

Description

Technical Field

[0001] This utility model relates to the field of engine cylinder head manufacturing and processing technology, specifically a positioning structure for engine cylinder head processing. Background Technology

[0002] The engine cylinder head is an important component of the engine, located above the cylinder block. Its production steps include blank preparation, casting, machining, assembly and strengthening treatment, and quality inspection. Casting includes blank casting and post-casting treatment. Machining includes milling, drilling, reaming, boring, tapping, and grinding. During post-casting treatment, the cylinder head blank needs to be fixed by the included angle on the machining tool. Then, the cylinder head blank is processed by operating grinding wheels, drills, and turning tools to gradually complete burr removal, grinding, hole opening, boring, etc.

[0003] In the current technology, when processing the cylinder head blank, it is necessary to use a fixture to fix the two sides of the cylinder head blank, and then start the grinding wheel. The high-speed rotating grinding wheel grinds the surface of the cylinder head blank to remove risers, flash, and burrs, thereby improving the surface precision of the cylinder head blank. In actual processing, after one side of the cylinder head blank is machined using a grinding wheel, the fixture needs to be released from the cylinder head blank, then the cylinder head blank is flipped to the other side and re-fixed, and then grinding continues. Therefore, after each side is machined, the above operation needs to be repeated. Since each grinding affects the accuracy of the cylinder head blank itself, and each time it is re-fixed, the positioning reference between the blank and the fixture is difficult to be completely consistent due to the accuracy of the cylinder head blank itself, resulting in uneven grinding on the surface of the cylinder head blank, which in turn affects the subsequent assembly. Therefore, a positioning structure for engine cylinder head machining is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a positioning structure for engine cylinder head machining. It features a positioning and flipping advantage, solving the problem that after machining one side of the cylinder head blank using a grinding wheel, the clamping fixture needs to be released, the blank flipped to the other side, and re-fixed before grinding continues. This process requires repeating the above steps after machining each side. Since each grinding operation affects the precision of the cylinder head blank, and the positioning reference between the blank and the fixture is difficult to maintain perfectly consistent due to the blank's inherent precision, the grinding amount on the cylinder head blank surface is uneven, thus affecting subsequent assembly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a positioning structure for machining engine cylinder heads, comprising a mounting plate and a grinding table mounted on a machining tool, wherein the mounting plate and the grinding table are rotatably mounted, and a positioning structure for fixing the cylinder head blank is provided on the grinding table; The positioning structure includes two clamps for abutting against the inner wall of the cylinder head blank, and the two clamps are symmetrically distributed and slidably installed on the grinding table. The grinding table is provided with an adjusting component for controlling the two clamps to move towards each other. The grinding table is also provided with a control console for driving the adjusting component to rotate. The control console is provided with a locking component for fixing the rotation angle of the grinding table. The fixture includes a positioning plate that is slidably mounted on the grinding table, a rubber pad that is fixedly mounted on the positioning plate, and a connecting column that is fixedly connected to the bottom of the positioning plate. The adjusting component includes an adjusting plate rotatably mounted inside the grinding table. The adjusting plate has two centrally symmetrical arc-shaped grooves, and the connecting column is slidably connected to the arc-shaped grooves. A gear is fixedly mounted on the adjusting plate.

[0006] Furthermore, the control console includes a support plate fixedly connected to the grinding table, a rack that meshes with a gear is slidably mounted on the support plate, and an electric push rod is fixedly mounted on the support plate, with the telescopic end of the electric push rod engaging with the rack.

[0007] Furthermore, the locking component includes a mounting frame fixedly installed at the bottom of the support plate, a locking block for inserting the mounting plate is slidably installed inside the mounting frame, and a linear driver is fixedly installed on the mounting plate, with the telescopic end of the linear driver contacting the locking block.

[0008] Furthermore, the locking block is an integrated structure of a locking block, a rod, and a square plate, with a spring sleeved on the rod, and the telescopic end of the linear actuator contacts the square plate.

[0009] Furthermore, the mounting plate has four centrally symmetrical arc-shaped slots, and the arc-shaped slots are adapted to the front end of the card block.

[0010] Furthermore, a limiting strip is fixedly installed on the support plate, and a limiting groove is formed on the rack, with the limiting strip and the limiting groove being slidably connected.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. This positioning structure for engine cylinder head machining features a rotating mating plate and mounting plate that allows for blank flipping without disassembly, avoiding positioning datum deviations caused by repeated fixing. Symmetrical clamps abut against the blank from the inner wall for more stable fixing, and rubber pads prevent scratching the blank. The adjusting component engages with the connecting column through the arc groove of the adjusting plate, enabling the two clamps to move synchronously in opposite directions, ensuring uniform force during fixing, achieving one-time fixing and multi-face machining, ensuring consistent positioning datum on each face, and improving the uniformity of grinding amount. 2. The positioning structure used for engine cylinder head machining uses an electric push rod to drive the rack to slide, the rack to drive the gear to rotate, and then drive the adjusting parts to work, realizing the automatic opening and closing of the fixture, avoiding inconsistent fixture tightness caused by manual operation, and improving fixing accuracy and operating efficiency. 3. The positioning structure used for engine cylinder head machining uses a linear actuator to push the locking block into the mounting plate, quickly fixing the rotation angle of the grinding table and ensuring the stability of the blank position during machining. When the locking block is spring-loaded into the corresponding arc-shaped slot, it is easy to manually control the grinding table to rotate 90 degrees. The linear actuator also holds the square plate to restrict the locking block and prevent the grinding table from loosening. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the grinding table and positioning structure of this utility model; Figure 3 This is a schematic diagram of the grinding table, locking component, and support plate of this utility model. Figure 4 This is a schematic diagram of the structural clamp and adjusting component of this utility model; Figure 5 This is a schematic diagram of the control console structure of this utility model.

[0013] In the diagram: 1. Mounting plate; 11. Arc-shaped groove; 2. Grinding table; 3. Positioning structure; 31. Fixture; 311. Positioning plate; 312. Rubber pad; 313. Connecting column; 32. Adjusting component; 321. Adjusting disc; 322. Arc-shaped groove; 323. Gear; 33. Control console; 331. Support plate; 332. Rack; 333. Electric push rod; 334. Limit bar; 34. Locking component; 341. Mounting frame; 342. Locking block; 343. Spring; 344. Linear actuator. Detailed Implementation

[0014] 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.

[0015] Example 1: Please refer to Figure 1-5 The positioning structure for machining engine cylinder heads in this embodiment includes a mounting plate 1 and a grinding table 2 mounted on a machining tool. The mounting plate 1 and the grinding table 2 are rotatably mounted, and the grinding table 2 is provided with a positioning structure 3 for fixing the cylinder head blank.

[0016] Using the above technical solution, the grinding table 2 and the mounting plate 1 rotate together, so that the blank does not need to be disassembled when it is flipped, thus avoiding the positioning reference deviation caused by repeated fixing.

[0017] Example 2: Please refer to Figure 1-5 Based on Embodiment 1, the positioning structure 3 includes two clamps 31 for abutting against the inner wall of the cylinder head blank, and the two clamps 31 are symmetrically distributed and slidably installed on the grinding table 2. The grinding table 2 is provided with an adjusting member 32 for controlling the two clamps 31 to move towards each other. The grinding table 2 is provided with a control console 33 for driving the adjusting member 32 to rotate. The control console 33 is provided with a locking member 34 for fixing the rotation angle of the grinding table 2. The fixture 31 includes a positioning plate 311 that is slidably mounted on the grinding table 2, a rubber pad 312 that is fixedly mounted on the positioning plate 311, and a connecting column 313 that is fixedly connected to the bottom of the positioning plate 311. The adjusting component 32 includes an adjusting plate 321 rotatably installed inside the grinding table 2. The adjusting plate 321 has two centrally symmetrical arc-shaped grooves 322, and the connecting column 313 is slidably connected to the arc-shaped grooves 322. A gear 323 is fixedly installed on the adjusting plate 321.

[0018] The control console 33 includes a support plate 331 fixedly connected to the grinding table 2. A rack 332 that meshes with the gear 323 is slidably mounted on the support plate 331. An electric push rod 333 is fixedly mounted on the support plate 331, and the telescopic end of the electric push rod 333 is connected to the rack 332. The electric push rod 333 drives the rack 332 to slide, and the rack 332 drives the gear 323 to rotate, thereby driving the adjusting component 32 to work and realize the automatic opening and closing of the clamp 31.

[0019] In addition, a limit strip 334 is fixedly installed on the support plate 331, and a limit groove is opened on the rack 332. The limit strip 334 is slidably connected to the limit groove. The limit strip 334 and the limit groove cooperate to guide the sliding of the rack 332, ensuring stable meshing between the rack 332 and the gear 323, avoiding adjustment errors caused by the offset of the rack 332, ensuring the synchronous movement of the two clamps 31, and further improving the fixing accuracy.

[0020] Using the above technical solution, the electric push rod 333 of the control console 33 is activated, and its telescopic end pushes the rack 332 to slide along the limiting strip 334 of the support plate 331. The rack 332 meshes with the gear 323 of the adjusting component 32, causing the adjusting plate 321 to rotate inside the grinding table 2. The arc groove 322 of the adjusting plate 321 rotates with it, forcing the connecting column 313 of the clamp 31 to slide along the arc groove 322, thereby driving the two positioning plates 311 to move towards each other. The positioning plates 311 tightly abut against the inner wall of the cylinder head blank through the rubber pad 312 until the preset clamping force is reached, thus completing the blank fixing.

[0021] Example 3: Please refer to Figure 1-5 Based on Embodiment 2, the locking component 34 includes a mounting frame 341 fixedly installed at the bottom of the support plate 331. A locking block 342 for inserting the mounting plate 1 is slidably installed inside the mounting frame 341. A linear driver 344 is fixedly installed on the mounting plate 1, and the telescopic end of the linear driver 344 contacts the locking block 342.

[0022] The locking block 342 is an integrated structure of the locking block, the rod and the square plate. A spring 343 is sleeved on the rod. The telescopic end of the linear actuator 344 contacts the square plate. The locking block 342, together with the spring 343, achieves the pre-fixation of the angle of the grinding table 2. After the linear actuator 344 extends, it restricts the square plate.

[0023] In addition, four centrally symmetrical arc-shaped slots 11 are provided on the mounting plate 1, and the arc-shaped slots 11 are adapted to the front end of the locking block. The arc-shaped slots 11 and the locking block are adapted to limit the precise rotation of the grinding table 2 by ninety degrees. The four centrally symmetrical arc-shaped slots 11 can meet the processing requirements of the four sides of the cylinder head blank.

[0024] Using the above technical solution, after the first side is processed, the linear actuator 344 retracts, the rotating grinding table 2 rotates the blank 90 degrees, so that the unprocessed second side faces upward. Under the elastic action of the spring 343, the locking block 342 moves forward and re-inserts the corresponding arc-shaped slot 11 to complete the initial positioning. Then the linear actuator 344 is activated, so that the telescopic end of the linear actuator 344 abuts against the square plate of the locking block 342, thereby restricting the position of the locking block 342.

[0025] The working principle of the above embodiments is as follows: The positioning structure used for engine cylinder head machining allows the cylinder head blank to be hoisted onto the surface of the grinding table 2 during use, so that the two sides of the inner wall of the blank are aligned with the positioning plates 311 of the two clamps 31 respectively, ensuring that the center of the blank is basically coincident with the rotation center of the grinding table 2, reducing the center of gravity shift during subsequent rotation. The electric push rod 333 of the control console 33 is activated. Its telescopic end pushes the rack 332 to slide along the limiting strip 334 of the support plate 331. The rack 332 meshes with the gear 323 of the adjusting component 32, causing the adjusting plate 321 to rotate inside the grinding table 2. The arc groove 322 of the adjusting plate 321 rotates with it, forcing the connecting column 313 of the clamp 31 to slide along the arc groove 322, thereby driving the two positioning plates 311 to move towards each other. The positioning plates 311 tightly abut against the inner wall of the cylinder head blank through the rubber pad 312 until the preset clamping force is reached, thus completing the blank fixing. At this time, the linear driver 344 of the locking component 34 is in the extended state, and its telescopic end abuts against the square plate part of the locking block 342, forcing the locking block 342 to insert into the arc-shaped slot 11 of the mounting plate 1. The spring 343 is compressed, and the grinding table 2 achieves angle fixation by locking the locking block 342 with the arc-shaped slot 11 of the mounting plate 1, ensuring that the blank does not shake during the processing. After the first side is processed, the linear actuator 344 retracts, the rotating grinding table 2 rotates and drives the blank to flip 90 degrees, so that the unprocessed second side faces upward. Under the elastic action of the spring 343, the locking block 342 moves forward and re-inserts into the arc-shaped slot 11 at the corresponding position to complete the initial positioning. Then the linear actuator 344 is activated, so that the telescopic end of the linear actuator 344 abuts against the square plate of the locking block 342, thereby restricting the position of the locking block 342.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning structure for machining engine cylinder heads, comprising a mounting plate (1) and a grinding table (2) disposed on a machining tool, characterized in that: The mounting plate (1) and the grinding table (2) are rotatably mounted, and the grinding table (2) is provided with a positioning structure (3) for fixing the cylinder head blank. The positioning structure (3) includes two clamps (31) for abutting against the inner wall of the cylinder head blank, and the two clamps (31) are symmetrically distributed and slidably installed on the grinding table (2). The grinding table (2) is provided with an adjusting member (32) for controlling the two clamps (31) to move towards each other. The grinding table (2) is provided with a control console (33) for driving the adjusting member (32) to rotate. The control console (33) is provided with a locking member (34) for fixing the rotation angle of the grinding table (2). The fixture (31) includes a positioning plate (311) that is slidably mounted on the grinding table (2), a rubber pad (312) is fixedly mounted on the positioning plate (311), and a connecting column (313) is fixedly connected to the bottom of the positioning plate (311). The adjusting component (32) includes an adjusting plate (321) rotatably installed inside the grinding table (2). The adjusting plate (321) has two centrally symmetrical arc grooves (322), and the connecting column (313) is slidably connected to the arc grooves (322). A gear (323) is fixedly installed on the adjusting plate (321).

2. The positioning structure for engine cylinder head machining according to claim 1, characterized in that: The control console (33) includes a support plate (331) fixedly connected to the grinding table (2). A rack (332) that meshes with a gear (323) is slidably mounted on the support plate (331). An electric push rod (333) is fixedly mounted on the support plate (331), and the telescopic end of the electric push rod (333) is connected to the rack (332).

3. A positioning structure for engine cylinder head machining according to claim 2, characterized in that: The locking component (34) includes a mounting frame (341) fixedly installed at the bottom of the support plate (331). A locking block (342) for inserting the mounting plate (1) is slidably installed inside the mounting frame (341). A linear driver (344) is fixedly installed on the mounting plate (1), and the telescopic end of the linear driver (344) contacts the locking block (342).

4. A positioning structure for engine cylinder head machining according to claim 3, characterized in that: The locking block (342) is an integrated structure of a locking block, a rod and a square plate, and a spring (343) is sleeved on the rod. The extension end of the linear actuator (344) contacts the square plate.

5. A positioning structure for engine cylinder head machining according to claim 4, characterized in that: The mounting plate (1) has four centrally symmetrical arc-shaped slots (11), and the arc-shaped slots (11) are adapted to the front end of the card block.

6. A positioning structure for engine cylinder head machining according to claim 2, characterized in that: A limiting strip (334) is fixedly installed on the support plate (331), and a limiting groove is opened on the rack (332). The limiting strip (334) is slidably connected to the limiting groove.

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