High-precision engine rocker arm processing device and processing method thereof

Abstract

This invention discloses a high-precision engine rocker arm machining device and its machining method, belonging to the field of engine rocker arm machining technology. It includes a worktable, a rotary seat, a base plate, a first machining area, and a second machining area. The rotary seat is mounted on the worktable to rotate the base plate located above the worktable. The first and second machining areas are located on the same side of the base plate. A first positioning device is provided in the first machining area, and a second positioning device is provided in the second machining area mounted on a five-axis adjusting seat. The first and second positioning devices are used to position the engine rocker arm placed sequentially in the first and second machining areas. This invention eliminates the need for repeated adjustments of CNC parameters and multiple conversions of positioning references, reducing error accumulation. It also eliminates the need for frequent machine tool preheating. By using a five-axis adjusting seat in conjunction with a rotary seat, multiple machining processes can be completed in a single clamping operation, concentrating dispersed processes, reducing the number of clamping operations, and improving the machining accuracy and efficiency of holes on the engine rocker arm.

Description

Technical Field

[0001] This invention relates to the field of engine rocker arm machining technology, specifically to a high-precision engine rocker arm machining device and machining method. Background Technology

[0002] The engine rocker arm is a key transmission component in the automotive valve train, playing a crucial role in supporting the rocker arm, transmitting motion, and bearing alternating loads. Traditional rocker arm machining processes typically employ multiple distributed CNC machine tools. This distributed machining method results in numerous clamping operations, difficult process connections, high labor intensity for workers, and difficulty in ensuring consistent precision across processes. Traditional machining processes suffer from the following main problems in rocker arm clamping and positioning: significant manual positioning errors; repositioning is required when moving to another CNC machine tool, which then needs to adjust its CNC parameters according to the rocker arm being positioned. Furthermore, multiple switching of positioning references during machining leads to increased cumulative errors. Additionally, the machine tool requires thorough preheating (over 30 minutes) to reach thermal equilibrium, resulting in energy waste from frequent preheating switches; multiple clamping operations are required for multiple processes, leading to long processing times and low efficiency; and multiple tool changes result in inconsistent surface roughness. Therefore, designing a high-precision engine rocker arm machining device and its machining method is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision engine rocker arm machining device and machining method to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-precision engine rocker arm processing device, including a worktable, a rotary seat, a base plate, a first processing area and a second processing area, wherein the rotary seat is disposed on the worktable for driving the base plate disposed above the worktable to rotate, and the first processing area and the second processing area are disposed on the same side of the base plate; The first processing area is equipped with a first positioning device, and the second processing area is equipped with a second positioning device installed on a five-axis adjustment seat. The first positioning device and the second positioning device are used to position the engine rocker arm that is placed in the first processing area and the second processing area in sequence. The engine rocker arm includes a rocker arm body and a piston connection part, a control valve connection part, and a roller connection part integrally formed therewith; The first positioning device includes a first positioning mechanism for positioning the roller connection part and the control valve connection part respectively, and a first clamping mechanism for clamping the roller connection part and the rocker arm body respectively. It operates within the first processing area to open the center hole on the rocker arm body and the eighteen holes on the roller connection part. The second positioning device includes a second positioning mechanism and a second clamping mechanism mounted on the five-axis adjusting seat. The second positioning mechanism is used to position the center hole and the eighteen holes, and the second clamping mechanism is used to clamp the rocker arm body. Within the second processing area, the control valve hole on the control valve connection, the piston hole on the piston connection, the oil hole on the engine rocker arm, and the roller groove on the roller connection are opened. The control valve hole and the piston hole are located on the side of the center hole away from the eighteen holes.

[0005] In a further embodiment, the first positioning mechanism includes a first positioning cylinder and a second positioning cylinder disposed in the first processing area. The output end of the first positioning cylinder is connected to a first positioning block, which is located on one side of the roller connection portion. The output end of the second positioning cylinder is connected to a second positioning block, which is located on one side of the control valve connection portion.

[0006] In a further embodiment, the first pressing mechanism includes a first upper pressing cylinder and a second upper pressing cylinder disposed in the first processing area. The output ends of the first upper pressing cylinder and the second upper pressing cylinder are respectively connected to the first pressing head, and the two first pressing heads are respectively located on one side of the roller connection part and the rocker arm body.

[0007] In a further embodiment, the second positioning mechanism includes a center hole positioning pin installed on the five-axis adjusting seat, the center hole positioning pin cooperating with the center hole, and a pneumatic expansion positioning cylinder installed on the five-axis adjusting seat, the output end of the pneumatic expansion positioning cylinder being connected to an eighteen-hole expansion pin, the eighteen-hole expansion pin cooperating with the eighteen holes.

[0008] In a further embodiment, the second pressing mechanism includes a third upper pressing cylinder and a fourth upper pressing cylinder mounted on the five-axis adjusting seat. The output ends of the third upper pressing cylinder and the fourth upper pressing cylinder are respectively connected to the second pressing head, and the two second pressing heads are located on one side of the rocker arm body.

[0009] In a further embodiment, a first limiting block and a second limiting block are respectively provided in the first processing area outside the piston connection portion, and the first limiting block and the second limiting block are used to limit the piston connection portion.

[0010] In a further embodiment, the piston connection portion has a boss on its surface, and the first limiting block has a pressure post on its side facing the boss that cooperates with the boss.

[0011] In a further embodiment, the first positioning block is V-shaped and cooperates with the roller connection portion.

[0012] The machining method for a high-precision engine rocker arm machining device includes the following steps: Step 1: After fully preheating the entire device, place the engine rocker arm in the first machining area, ensuring that each machining surface of the engine rocker arm has sufficient machining allowance. Step 2: Position the roller connection and the control valve connection using the first positioning mechanism, and press the roller connection and the rocker arm body using the first pressing mechanism. Step 3: After the engine rocker arm is positioned and pressed, use a cutting tool to open a center hole on the rocker arm body and eighteen holes on the roller connection part; Step 4: After the center hole and the eighteen holes are opened, move the processed engine rocker arm to the five-axis adjustment seat on the second processing area. Use the second positioning mechanism to position the center hole on the rocker arm body and the eighteen holes on the roller connection part, and use the second clamping mechanism to clamp the rocker arm body. Step 5: After the engine rocker arm is positioned and pressed, adjust the machining position and angle of the engine rocker arm by using the five-axis adjustment seat and the rotating seat. Use a cutting tool to open a control valve hole on the control valve connection part, a piston hole on the piston connection part, an oil hole on the engine rocker arm, and a roller groove on the roller connection part. Step 6: Heat treat the machined engine rocker arm, and then perform precision grinding on the mating surfaces of the engine rocker arm.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention positions and clamps the engine rocker arm in the first processing area using a first positioning device. Within the first processing area, the central hole on the rocker arm body and the eighteen holes on the roller connection are opened. After the central hole and the eighteen holes are opened, the engine rocker arm is horizontally transferred to the second processing area. In the second processing area, the engine rocker arm is positioned and clamped on the five-axis adjusting seat using a second positioning device, ensuring that the rotational freedom of the rocker arm is restricted and achieving complete positioning. Within the second processing area, the control valve hole on the control valve connection, the piston hole on the piston connection, the oil hole on the engine rocker arm, and the roller groove on the roller connection are opened. This eliminates the need for repeated adjustments of CNC parameters, multiple conversions of positioning references, reduced error accumulation, and frequent switching and preheating of the machine tool. The use of a five-axis adjusting seat in conjunction with a rotary seat enables multi-process machining to be completed in a single clamping operation, concentrating dispersed processes, reducing the number of clamping operations, and improving the machining accuracy and efficiency of the holes on the engine rocker arm. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an overall top view of the invention; Figure 3 This is a schematic diagram of the installation structure of the pneumatic expansion positioning cylinder of the present invention; Figure 4 This is a schematic diagram of the installation structure of the first limiting block and the second limiting block of the present invention; Figure 5 This is a schematic diagram of the first positioning block structure of the present invention; Figure 6 This is a schematic diagram of the second positioning block structure of the present invention; Figure 7 This is a schematic diagram of the engine rocker arm structure after processing according to the present invention; The attached figures are labeled as follows: 1. Worktable; 2. Rotary seat; 3. Base plate; 4. First positioning cylinder; 5. First positioning block; 6. Second positioning cylinder; 7. Second positioning block; 8. First pressing cylinder; 9. Second pressing cylinder; 10. First pressing head; 11. First limiting block; 12. Second limiting block; 13. Rocker arm body; 14. Center hole; 15. Eighteen holes; 16. Center hole positioning pin; 17. Third pressing cylinder; 18. Fourth pressing cylinder; 19. Second pressing head; 20. Pneumatic expansion positioning cylinder; 21. Eighteen-hole expansion pin; 22. Five-axis adjusting seat; 23. Piston hole; 24. Control valve hole; 25. Roller groove; 26. Oil hole. Detailed Implementation

[0015] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0016] Please see Figures 1-7 The present invention provides a technical solution: a high-precision engine rocker arm processing device, including a worktable 1, a rotary seat 2, a base plate 3, a first processing area and a second processing area. The rotary seat 2 is disposed on the worktable 1 to drive the base plate 3 disposed above the worktable 1 to rotate. The first processing area and the second processing area are disposed on the same side of the base plate 3. The first processing area is equipped with a first positioning device, and the second processing area is equipped with a second positioning device installed on the five-axis adjustment seat 22. The first positioning device and the second positioning device are used to position the engine rocker arm placed in the first processing area and the second processing area in sequence. The engine rocker arm includes a rocker arm body 13 and a piston connection part, a control valve connection part and a roller connection part integrally formed with the rocker arm body 13; The first positioning device includes a first positioning mechanism for positioning the roller connection part and the control valve connection part respectively, and a first clamping mechanism for clamping the roller connection part and the rocker arm body 13 respectively. It operates in the first processing area to open the center hole 14 on the rocker arm body 13 and the eighteen holes 15 on the roller connection part. The second positioning device includes a second positioning mechanism and a second clamping mechanism mounted on the five-axis adjusting seat 22. The second positioning mechanism is used to position the center hole 14 and the eighteen holes 15, and the second clamping mechanism is used to clamp the rocker arm body 13. In the second processing area, the control valve hole 24 on the control valve connection part, the piston hole 23 on the piston connection part, the oil hole 26 on the engine rocker arm, and the roller groove 25 on the roller connection part are opened. The control valve hole 24 and the piston hole 23 are located on the side of the center hole 14 away from the eighteen holes 15. Several oil holes 26 are opened on the engine rocker arm, and the roller groove 25 is opened on the roller connection part near the position of the eighteen holes 15.

[0017] In a further embodiment, the first positioning mechanism includes a first positioning cylinder 4 and a second positioning cylinder 6 disposed in the first processing area. The output end of the first positioning cylinder 4 is connected to a first positioning block 5, which is located on one side of the roller connection portion. The output end of the second positioning cylinder 6 is connected to a second positioning block 7, which is located on one side of the control valve connection portion.

[0018] Through the above technical solution, the first positioning cylinder 4 pushes the first positioning block 5 to move, thereby positioning and tightening the roller connection part; the second positioning cylinder 6 pushes the second positioning block 7 to move, thereby positioning and tightening the control valve connection part.

[0019] In a further embodiment, the first pressing mechanism includes a first upper pressing cylinder 8 and a second upper pressing cylinder 9 disposed in the first processing area. The output ends of the first upper pressing cylinder 8 and the second upper pressing cylinder 9 are respectively connected to the first pressing head 10. The two first pressing heads 10 are respectively located on one side of the roller connection part and the rocker arm body 13.

[0020] Through the above technical solution, the first upper pressure cylinder 8 and the second upper pressure cylinder 9 respectively drive the adjacent first pressure head 10 to move down, pressing the roller connection part and the rocker arm body 13, so that the engine rocker arm is stable as a whole.

[0021] In a further embodiment, the second positioning mechanism includes a center hole positioning pin 16 mounted on a five-axis adjusting seat 22, the center hole positioning pin 16 cooperating with a center hole 14, a pneumatic expansion positioning cylinder 20 mounted on the five-axis adjusting seat 22, the output end of the pneumatic expansion positioning cylinder 20 being connected to an eighteen-hole expansion pin 21, the eighteen-hole expansion pin 21 cooperating with an eighteen-hole 15.

[0022] Through the above technical solution, the center hole 14 is limited by the center hole positioning pin 16, and the eighteen-hole expansion pin 21 is driven by the pneumatic expansion positioning cylinder 20, which in turn limits the eighteen-hole 15, thus stabilizing the engine rocker arm as a whole.

[0023] In a further embodiment, the second pressing mechanism includes a third upper pressing cylinder 17 and a fourth upper pressing cylinder 18 mounted on the five-axis adjusting seat 22. The output ends of the third upper pressing cylinder 17 and the fourth upper pressing cylinder 18 are respectively connected to the second pressing head 19, and the two second pressing heads 19 are located on one side of the rocker arm body 13.

[0024] Through the above technical solution, the third upper pressure cylinder 17 and the fourth upper pressure cylinder 18 respectively drive the adjacent second pressure head 19 to move down, pressing the rocker arm body 13, so that the engine rocker arm is stable as a whole.

[0025] In a further embodiment, a first limiting block 11 and a second limiting block 12 are respectively provided on the outside of the piston connection portion in the first processing area. The first limiting block 11 and the second limiting block 12 are used to limit the piston connection portion.

[0026] Through the above technical solution, the first limiting block 11 and the second limiting block 12 are used to limit the piston connection, so that the first positioning cylinder 4 pushes the first positioning block 5 to move and position and tighten the roller connection, and the second positioning cylinder 6 pushes the second positioning block 7 to move and position and tighten the control valve connection, the engine rocker arm is stable as a whole.

[0027] In a further embodiment, the piston connection part surface is provided with a boss, and the first limiting block 11 is provided with a pressure post that cooperates with the boss on the side facing the boss.

[0028] Through the above technical solution, the first limiting block 11 limits the piston connection part by cooperating with the pressure column and the boss.

[0029] In a further embodiment, the first positioning block 5 is V-shaped and cooperates with the roller connection part.

[0030] Through the above technical solution, the positioning accuracy of the roller connection part is ensured by setting the V-shaped first positioning block 5. The V-shaped angle is 90°-120°. The roller connection part is provided with a rod part that cooperates with the first positioning block 5. The rod part is positioned by the first positioning block 5 to prevent the engine rocker arm from deforming or vibrating due to cutting force and to ensure machining rigidity. The V-shaped surface of the first positioning block 5 is in line contact with the outer circle of the rod part.

[0031] The machining method for a high-precision engine rocker arm machining device includes the following steps: Step 1: After fully preheating the high-precision engine rocker arm machining device, place the engine rocker arm in the first machining area to ensure that each machining surface of the engine rocker arm has sufficient machining allowance. Step 2: Position the roller connection and the control valve connection using the first positioning mechanism, and press the roller connection and the rocker arm body 13 using the first pressing mechanism. Step 3: After the engine rocker arm is positioned and pressed, a center hole 14 is made on the rocker arm body 13 using a cutting tool, and eighteen holes 15 are made on the roller connection part. Step 4: After the center hole 14 and the eighteen holes 15 are opened, move the processed engine rocker arm to the five-axis adjustment seat 22 on the second processing area, and use the second positioning mechanism to position the center hole 14 on the rocker arm body 13 and the eighteen holes 15 on the roller connection part, and use the second pressing mechanism to press the rocker arm body 13. Step 5: After the engine rocker arm is positioned and pressed, adjust the machining position and angle of the engine rocker arm by using the five-axis adjusting seat 22 in conjunction with the rotating seat 2. Use a cutting tool to open the control valve hole 24 on the control valve connection part, use a cutting tool to open the piston hole 23 on the piston connection part, use a cutting tool to open the oil hole 26 on the engine rocker arm, and use a cutting tool to open the roller groove 25 on the roller connection part. Step 6: Heat treat the machined engine rocker arm, and then perform precision grinding on the mating surfaces of the engine rocker arm.

[0032] Working Principle: After fully preheating the high-precision engine rocker arm machining device, the engine rocker arm is placed in the first machining area, ensuring sufficient machining allowance on each machining surface. The first positioning cylinder 4 pushes the first positioning block 5 to move, positioning and clamping the roller connection. The second positioning cylinder 6 pushes the second positioning block 7 to move, positioning and clamping the control valve connection. The first pressing cylinder 8 and the second pressing cylinder 9 respectively drive the adjacent first pressing head 10 to move down, clamping the roller connection and the rocker arm body 13, ensuring that the rotational freedom of the engine rocker arm is restricted and achieving complete positioning. After the engine rocker arm is positioned and clamped, a center hole 14 is opened on the rocker arm body 13 and eighteen holes 15 are opened on the roller connection. After the center hole 14 and eighteen holes 15 are opened, the machined engine rocker arm is moved to the five-axis adjustment area in the second machining area. At the top of seat 22, the center hole 14 is limited by the center hole positioning pin 16. The pneumatic expansion positioning cylinder 20 drives the eighteen-hole expansion pin 21, which limits the eighteen-hole 15. The third upper pressure cylinder 17 and the fourth upper pressure cylinder 18 respectively drive the adjacent second pressure head 19 to move down, pressing the rocker arm body 13 to ensure that the rotational freedom of the engine rocker arm is restricted and complete positioning is achieved. After the engine rocker arm is positioned and pressed, the machining position and angle of the engine rocker arm are adjusted by the five-axis adjustment seat 22 in conjunction with the rotating seat 2. The control valve hole 24 is opened on the control valve connection part by the cutting tool, the piston hole 23 is opened on the piston connection part by the cutting tool, the oil hole 26 is opened on the engine rocker arm by the cutting tool, and the roller groove 25 is opened on the roller connection part by the cutting tool. The machined engine rocker arm is heat treated, and then the mating surface of the engine rocker arm is precision ground.

[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A high-precision engine rocker arm machining device, characterized in that, It includes a worktable (1), a rotary seat (2), a base plate (3), a first processing area and a second processing area. The rotary seat (2) is located on the worktable (1) and is used to drive the base plate (3) located above the worktable (1) to rotate. The first processing area and the second processing area are located on the same side of the base plate (3). The first processing area is provided with a first positioning device, and the second processing area is provided with a second positioning device installed on the five-axis adjustment seat (22). The first positioning device and the second positioning device are used to position the engine rocker arm that is placed in the first processing area and the second processing area in sequence. The engine rocker arm includes a rocker arm body (13) and a piston connection part, a control valve connection part and a roller connection part integrally formed therewith; The first positioning device includes a first positioning mechanism for positioning the roller connection part and the control valve connection part respectively, and a first clamping mechanism for clamping the roller connection part and the rocker arm body (13) respectively. The device operates in the first processing area to open the center hole (14) on the rocker arm body (13) and the eighteen holes (15) on the roller connection part. The second positioning device includes a second positioning mechanism and a second clamping mechanism installed on the five-axis adjusting seat (22). The second positioning mechanism is used to position the center hole (14) and the eighteen holes (15). The second clamping mechanism is used to clamp the rocker arm body (13). The control valve hole (24) on the control valve connection, the piston hole (23) on the piston connection, the oil hole (26) on the engine rocker arm and the roller groove (25) on the roller connection are opened in the second processing area. The control valve hole (24) and the piston hole (23) are located on the side of the center hole (14) away from the eighteen holes (15).

2. The high-precision engine rocker arm machining device according to claim 1, characterized in that: The first positioning mechanism includes a first positioning cylinder (4) and a second positioning cylinder (6) located in the first processing area. The output end of the first positioning cylinder (4) is connected to the first positioning block (5), which is located on one side of the roller connection part. The output end of the second positioning cylinder (6) is connected to the second positioning block (7), which is located on one side of the control valve connection part.

3. The high-precision engine rocker arm machining device according to claim 1, characterized in that: The first pressing mechanism includes a first upper pressing cylinder (8) and a second upper pressing cylinder (9) located in the first processing area. The output ends of the first upper pressing cylinder (8) and the second upper pressing cylinder (9) are respectively connected to the first pressing head (10). The two first pressing heads (10) are located on one side of the roller connection part and the rocker arm body (13).

4. The high-precision engine rocker arm machining device according to claim 1, characterized in that: The second positioning mechanism includes a center hole positioning pin (16) installed on the five-axis adjustment seat (22), the center hole positioning pin (16) cooperating with the center hole (14), a pneumatic expansion positioning cylinder (20) is installed on the five-axis adjustment seat (22), the output end of the pneumatic expansion positioning cylinder (20) is connected to an eighteen-hole expansion pin (21), the eighteen-hole expansion pin (21) cooperating with the eighteen holes (15).

5. The high-precision engine rocker arm machining device according to claim 1, characterized in that: The second pressing mechanism includes a third upper pressing cylinder (17) and a fourth upper pressing cylinder (18) mounted on the five-axis adjusting seat (22). The output ends of the third upper pressing cylinder (17) and the fourth upper pressing cylinder (18) are respectively connected to the second pressing head (19). The two second pressing heads (19) are located on one side of the rocker arm body (13).

6. The high-precision engine rocker arm machining device according to claim 1, characterized in that: A first limiting block (11) and a second limiting block (12) are respectively provided on the outside of the piston connection part in the first processing area. The first limiting block (11) and the second limiting block (12) are used to limit the piston connection part.

7. The high-precision engine rocker arm machining device according to claim 6, characterized in that: The piston connection part is provided with a boss on its surface, and the first limiting block (11) is provided with a pressure post that cooperates with the boss on the side facing the boss.

8. The high-precision engine rocker arm machining device according to claim 2, characterized in that: The first positioning block (5) is V-shaped and cooperates with the roller connection part.

9. A processing method using the high-precision engine rocker arm processing device according to claims 1-8, characterized in that, Includes the following steps: Step 1: After fully preheating the entire device, place the engine rocker arm in the first machining area, ensuring that each machining surface of the engine rocker arm has sufficient machining allowance. Step 2: Position the roller connection and the control valve connection respectively through the first positioning mechanism, and press the roller connection and the rocker arm body (13) respectively through the first pressing mechanism; Step 3: After the engine rocker arm is positioned and pressed, a central hole (14) is made on the rocker arm body (13) and eighteen holes (15) are made on the roller connection part using a cutting tool. Step 4: After the center hole (14) and the eighteen holes (15) are opened, move the processed engine rocker arm to the five-axis adjustment seat (22) on the second processing area, and use the second positioning mechanism to position the center hole (14) on the rocker arm body (13) and the eighteen holes (15) on the roller connection part, and use the second pressing mechanism to press the rocker arm body (13); Step 5: After the engine rocker arm is positioned and pressed, adjust the machining position and angle of the engine rocker arm by using the five-axis adjustment seat (22) in conjunction with the rotating seat (2). Open the control valve hole (24) on the control valve connection part with the cutting tool, open the piston hole (23) on the piston connection part with the cutting tool, open the oil hole (26) on the engine rocker arm with the cutting tool, and open the roller groove (25) on the roller connection part with the cutting tool. Step 6: Heat treat the machined engine rocker arm, and then perform precision grinding on the mating surfaces of the engine rocker arm.

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