Hole site calibration device for automobile engine cylinder cover machining and using method of hole site calibration device

Abstract

The invention discloses a hole site calibration device for automobile engine cylinder cover machining and a using method of the hole site calibration device, and relates to the technical field of calibration devices. The device comprises a support, the top of the support is fixedly connected with a rotating assembly, and an inner cavity of the support is fixedly connected with a calibration assembly. By means of a double fixing structure of the clamping piece, the rotating shaft and the follow-up shaft in the rotating assembly, firm limiting of the engine cylinder cover is achieved, displacement of the cylinder cover in the calibration process is effectively avoided, the accuracy of hole site calibration is guaranteed, meanwhile, complex programming of equipment is not needed, multi-face calibration can be completed through cooperation of mechanical structures, and the production efficiency is improved. Compared with the prior art, equipment control logic is simplified, equipment manufacturing cost and later maintenance difficulty are reduced, the device is more suitable for batch detection requirements of small and medium-scale machining enterprises, in addition, an infrared distance meter in the calibration assembly is matched with a ccd camera, accurate adjustment of the calibration distance and clear capture of a hole site can be achieved, and calibration precision is further improved.

Description

Technical Field

[0001] This invention belongs to the field of calibration device technology, and in particular relates to a hole position calibration device for machining automobile engine cylinder heads and its usage method. Background Technology

[0002] The cylinder head is mounted on top of the cylinder block, sealing the cylinder from above and forming the combustion chamber. It is constantly in contact with high-temperature, high-pressure combustion gases, thus bearing significant thermal and mechanical loads. The accuracy of the cylinder head bores is crucial for engine assembly; if the bores deviate, the cylinder head must be removed and re-machined. Therefore, after machining, the cylinder head often needs to be inspected. This inspection typically involves workers placing the cylinder head on appropriate fixtures and then using a testing pen or a coordinate measuring machine. Both of these methods are overly complex and waste a significant amount of workers' time.

[0003] Chinese patent application number CN201810330074.X discloses an automotive cylinder head measuring fixture, which includes the detection of blind holes and through holes. Compared with traditional single-sided detection, it improves the detection efficiency, expands the detection range of holes, and increases the applicability of the fixture.

[0004] Chinese patent application number CN201721358321.4 discloses a cylinder head hole position measurement tool. This invention designs and manufactures a template corresponding to the hole position of the cylinder head, and simultaneously opens a groove on the template to fit the contour of the cylinder head. When using the template for testing, the template cover is placed on the cylinder head, and the top of the cylinder head is inserted into the groove. This can avoid the position of the template shifting during the measurement process, thus avoiding the impact on measurement accuracy. Furthermore, it can perform cylinder head hole position detection simply and quickly, avoiding multiple measurements and improving testing efficiency.

[0005] These two schemes have the following disadvantages: 1. Although the first solution can perform fully automatic cylinder head inspection, it does not clamp the cylinder head, which makes the cylinder head prone to displacement during the inspection process, thus affecting the inspection results. In addition, it requires complex programming of the equipment, which increases the manufacturing cost of the equipment.

[0006] 2. Although the second option can inspect the cylinder head, it requires workers to flip the cylinder head over to inspect all sides, which wastes a lot of their time.

[0007] To address these issues, we provide a hole alignment device for machining automotive engine cylinder heads and its usage method. Summary of the Invention

[0008] The purpose of this invention is to provide a hole calibration device for machining automobile engine cylinder heads and its usage method. By cooperating with the bracket, rotating component and calibration component, the inconvenience of using the calibration device in the prior art is solved.

[0009] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0010] This invention relates to a hole calibration device for machining automobile engine cylinder heads, comprising a bracket, a rotating component fixedly connected to the top of the bracket, a calibration component fixedly connected to the inner cavity of the bracket, a support column, a mounting base fixedly connected to the bottom of the support column, and a mounting groove formed in the inner cavity of the support column. The rotating component includes an axial rotating member fixedly connected to the top of the support column, a horizontal rotating member fixedly connected to the surface of the axial rotating member, and a clamping member fixedly connected to the other side of the horizontal rotating member. The calibration component includes a first hydraulic telescopic rod fixedly connected to the inner cavity of the mounting groove, a mounting plate fixedly connected to the bottom of the first hydraulic telescopic rod, and a CCD camera fixedly connected to the top of the mounting plate.

[0011] The invention is further configured such that the axial rotating component includes a first motor fixedly connected to the top of the support column, the output shaft of the first motor is fixedly connected to a connecting plate, and the two sides of the back of the connecting plate are fixedly connected to second hydraulic telescopic rods. The output shaft of the second hydraulic telescopic rod passes through the surface of the connecting plate and is fixedly connected to a support plate. The connecting plate is driven to rotate by the first motor to achieve precise adjustment of the axial angle.

[0012] The invention is further configured such that the horizontal rotating component includes a third hydraulic telescopic rod fixedly connected to the surface of a support plate. One of the third hydraulic telescopic rods has a second motor fixedly connected to its output end. The output shaft of the second motor is fixedly connected to a reducer, and the output shaft of the reducer is fixedly connected to a rotating shaft. The output end of the other third hydraulic telescopic rod is fixedly connected to a follower shaft via a bearing. A support base is fixedly connected to the bottom of the second motor, and the other side of the support base is slidably connected to a connecting plate. The third hydraulic telescopic rod can drive the second motor, the rotating shaft, and the follower shaft to move horizontally, achieving precise insertion and positioning of the rotating shaft and the follower shaft into the cylinder head. The second motor drives the rotating shaft to rotate via the reducer, ensuring the accuracy of the rotation angle. The follower shaft rotates synchronously with the rotating shaft via a bearing, improving the stability of the cylinder head flipping process. The slidable connection between the support base and the connecting plate provides a guide for the second motor's movement, preventing deviation during horizontal movement.

[0013] The invention is further configured such that a rotating shaft and a follower shaft are inserted into the inner cavity of an engine cylinder head, and a third motor is fixedly connected to the inner cavities of both the rotating shaft and the follower shaft. A transmission shaft is fixedly connected to the output shaft of the third motor. A driving bevel gear is fixedly connected to the surface of the transmission shaft, and a driven bevel gear meshes with the surface of the driving bevel gear. A first lead screw is fixedly connected to the surface of the driven bevel gear. The inner walls of the rotating shaft and the follower shaft are fixedly connected to the first lead screw via bearing seats. A threaded tube is threaded onto the surface of the first lead screw, and the other end of the threaded tube extends through to the outside of the rotating shaft and the follower shaft and is fixedly connected. An arc-shaped plate is attached, and a rubber sheet is bonded to the surface of the arc-shaped plate with adhesive. A third motor drives the first lead screw to rotate through the transmission shaft, the drive bevel gear, and the driven bevel gear. This drives the solenoid tube and the arc-shaped plate to expand outward, thus firmly fixing the rotating shaft and the follower shaft inside the cylinder head cavity. The rubber sheet increases the friction between the arc-shaped plate and the inner wall of the cylinder head, improving the fixing effect, while avoiding damage to the inner wall of the cylinder head caused by rigid contact. This structure provides auxiliary fixing inside the cylinder head and forms a double fixation with the clamping parts, further ensuring the stability of the calibration process.

[0014] The invention is further configured such that the surfaces of the rotating shaft and the follower shaft are provided with through holes for the solenoid to pass through, and the through holes and the solenoid are rectangular in design. The rectangular through holes cooperate with the solenoid to restrict the rotational freedom of the solenoid, ensuring that the solenoid can only move linearly in the horizontal direction, thus ensuring the accuracy of the expansion and contraction of the arc plate and avoiding fixation failure due to the rotation of the solenoid.

[0015] The invention is further configured such that the clamping component includes a fixed plate fixedly connected to the surfaces of the rotating shaft and the follower shaft. Each of the four corners of the fixed plate has a movable groove. A clamping plate is slidably connected to the inner cavity of the movable groove. A second lead screw is threadedly connected to one side of the upper and lower clamping plates. A fourth motor is fixedly connected between the upper and lower second lead screws. The fourth motor is fixedly connected to the fixed plate by bolts. A limit rod is slidably connected to the other side of the upper and lower clamping plates. The limit rod is fixedly connected to the fixed plate by a bearing seat. The fourth motor drives the upper and lower second lead screws with opposite threads to rotate, causing the upper and lower clamping plates to move relative to each other, thus achieving a firm clamping of the engine cylinder head surface. The movable groove provides a sliding guide for the clamping plate, and the limit rod further restricts the movement direction of the clamping plate, preventing offset during clamping. This structure can adapt to cylinder heads of different thicknesses, improving the versatility of the device. Simultaneously, the clamping and fixing method is simple and reliable, facilitating quick clamping and disassembly.

[0016] The invention is further configured such that the clamping plate is clamped on the surface of the engine cylinder head, and the surface of the clamping plate has through holes corresponding to the holes on the surface of the engine cylinder head. This design can prevent the clamping plate from blocking the holes in the cylinder head, ensure that the CCD camera can accurately capture all hole information, ensure the comprehensiveness of calibration and testing, and also provide a positioning reference for hole calibration.

[0017] The invention is further configured such that the inner cavity of the clamping plate is provided with a threaded hole for use with the second lead screw, and the threads on the surfaces of the upper and lower second lead screws are designed to be opposite. The reverse thread design can realize the synchronous relative movement of the upper and lower clamping plates, improve the coordination and efficiency of the clamping action, ensure that the cylinder head is subjected to uniform force, and avoid excessive local force that could cause cylinder head deformation.

[0018] The present invention is further configured such that the calibration component also includes an infrared rangefinder fixedly connected to the bottom of the first motor. The infrared rangefinder can detect the distance between the mounting plate and the engine cylinder head in real time, providing a precise basis for the first hydraulic telescopic rod to adjust the position of the CCD camera, ensuring that the CCD camera is always at the optimal shooting distance, ensuring the clarity of the hole image, and thus improving the calibration accuracy.

[0019] A method for using a hole alignment device for machining an automotive engine cylinder head includes the following steps: S1. The engine cylinder head is hoisted to the installation position of this device using a small crane. Then, the output shaft of the third hydraulic telescopic rod drives the second motor, reducer, rotating shaft and follower shaft to move, and inserts the rotating shaft and follower shaft into the through holes at both ends of the engine cylinder head. S2. Then, by starting the third motor, the third motor drives the transmission shaft to rotate, the transmission shaft drives the active bevel gear to rotate, the active bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the first lead screw to rotate, the first lead screw drives the solenoid to move, and the solenoid drives the arc plate and rubber plate to expand outward, so that the rotating shaft and the follower shaft can be firmly fixed in the inner cavity of the engine cylinder head. S3. Then, by starting the fourth motor, the fourth motor drives the upper and lower second lead screws to rotate. The second lead screws drive the upper and lower clamping plates to move relative to each other, thus firmly fixing the engine cylinder head. At this time, the bottom of the engine cylinder head is facing down. Then, by starting the infrared rangefinder to detect the distance between the mounting plate and the engine cylinder head, if it meets the calibration parameters, the CCD camera can be started to take pictures to calibrate the hole position. If it does not meet the calibration parameters, the first hydraulic telescopic rod is started to move the mounting plate, thereby moving the CCD camera. After moving to the parameter position, the retraction of the first hydraulic telescopic rod can be stopped, and then the picture detection work can be carried out. S4. After the current position detection is completed, the second motor is started. The second motor drives the rotating shaft to rotate through the reducer. The rotating shaft drives the engine cylinder head and the follower shaft to rotate together by 90°. Then, the infrared rangefinder is started to detect the distance between the mounting plate and the engine cylinder head. After adjustment, the distance is calibrated by taking pictures. Similarly, the hole positions of the other two sides of the engine cylinder head can be calibrated. S5. When it is necessary to calibrate the side holes of the engine cylinder head, release the clamping part on one side, and then retract the corresponding third hydraulic telescopic rod. The third hydraulic telescopic rod drives the follower shaft to move. After the follower shaft moves, the third motor inside it reverses to release the expansion and fixing state. When the follower shaft is separated from the engine cylinder head, the corresponding second hydraulic telescopic rod drives the support plate and the follower shaft of the third hydraulic telescopic rod to retract to the surface of the connecting plate. Then, start the first motor to drive the connecting plate to rotate 90° so that the side separated from the follower shaft faces down. Then the adjustment work can be carried out, and the hole calibration and testing work can be carried out. S6. After the previous hole position calibration test is completed, restore the engine cylinder head to its original position, then fix the follower shaft and the corresponding clamping parts to the surface of the engine cylinder head, contact the clamping parts and rotating shaft on the other side of the engine cylinder head, and then rotate the surface to be tested downward by the first motor, and then the adjustment work can be carried out, and then the hole position calibration test work can be carried out. At this time, all hole position calibration tests of the engine cylinder head can be completed.

[0020] The present invention has the following beneficial effects.

[0021] 1. This invention achieves a firm fixation of the engine cylinder head through a dual fixing structure of the clamping component and the rotating shaft and follower shaft in the rotating assembly, effectively preventing cylinder head displacement during calibration and ensuring the accuracy of hole calibration. At the same time, no complex programming is required for the equipment; multi-face calibration can be completed through the coordinated cooperation of the mechanical structure, simplifying the equipment control logic, reducing the manufacturing cost and subsequent maintenance difficulty, and making it more suitable for the batch testing needs of small and medium-sized processing enterprises. In addition, the infrared rangefinder and CCD camera in the calibration assembly can achieve precise adjustment of the calibration distance and clear capture of the hole position, further improving the calibration accuracy.

[0022] 2. This invention, through the synergistic action of axial and horizontal rotating components, can drive the engine cylinder head to achieve multi-angle automatic rotation in both horizontal and vertical directions. It can complete the hole alignment of each surface of the cylinder head without manual intervention, significantly saving the time required for manual rotation and improving overall calibration efficiency. Simultaneously, the device completes all key operations of the cylinder head process, including hoisting, positioning, clamping, and rotation adjustment, through a mechanical structure. This reduces the number of manual intervention steps, lowers the labor intensity of workers, avoids cylinder head impact damage that may occur during manual operation, and ensures the quality of cylinder head processing and the safety of inspection. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0024] Figure 1This is a perspective view of a hole alignment device for machining an automobile engine cylinder head and its usage method.

[0025] Figure 2 This is a rear view schematic diagram of a hole alignment device for machining an automobile engine cylinder head and its usage method.

[0026] Figure 3 This is a bottom view schematic diagram of a hole alignment device for machining an automobile engine cylinder head and its usage method.

[0027] Figure 4 This is a three-dimensional schematic diagram of the clamping component in a hole calibration device for machining an automobile engine cylinder head and its usage method.

[0028] Figure 5 This is a side-view perspective view of the clamping component in a hole calibration device for machining an automobile engine cylinder head and its usage method.

[0029] Figure 6 This is a top sectional view of the clamping component in a hole alignment device for machining an automobile engine cylinder head and its usage method.

[0030] Figure 7 A hole position calibration device for machining automobile engine cylinder head and its usage method Figure 6 Enlarged diagram of point A.

[0031] In the attached diagram: 1. Bracket; 11. Support column; 12. Mounting base; 13. Mounting slot; 2. Rotating assembly; 21. Axial rotating component; 211. First motor; 212. Connecting plate; 213. Second hydraulic telescopic rod; 214. Support plate; 22. Horizontal rotating component; 221. Third hydraulic telescopic rod; 222. Second motor; 223. Reducer; 224. Rotating shaft; 225. Follower shaft; 226. Support base; 227. Third motor; 228. Transmission... 229. Driven shaft; 2210. Driven bevel gear; 2211. First lead screw; 2212. Screw; 2213. Arc plate; 2214. Rubber plate; 23. Clamping component; 231. Fixed plate; 232. Moving groove; 233. Clamping plate; 234. Second lead screw; 235. Fourth motor; 236. Limiting rod; 3. Calibration assembly; 31. First hydraulic telescopic rod; 32. Mounting plate; 33. CCD camera; 34. Infrared rangefinder. Detailed Implementation

[0032] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Please see Figures 1-7This invention relates to a hole position calibration device for machining automotive engine cylinder heads and its usage method. The device adopts a modular integrated design, with its core consisting of a support 1, a rotating assembly 2, and a calibration assembly 3, balancing structural rigidity and operational flexibility. The support column 11 and mounting base 1 of the support 1, and the rotating shaft 224, follower shaft 225, first lead screw 2211, and second lead screw 234 in the rotating assembly 2, are preferably made of high-strength carbon steel or aluminum alloy to ensure load resistance and transmission accuracy. Contact parts such as the clamping plate 233 and arc plate 2213 are injection molded from reinforced engineering plastics (such as ABS+glass fiber), and the rubber plate 2214 is made of wear-resistant and non-slip silicone. Functional components such as the first motor 211, second motor 222, third motor 227, and fourth motor 235, the first hydraulic telescopic rod 31, second hydraulic telescopic rod 213, third hydraulic telescopic rod 221, CCD camera 33, and infrared rangefinder 34 are standard parts adapted to the working conditions, and modular assembly enables convenient maintenance.

[0034] The bracket 1 serves as the mounting reference for the entire device. The support column 11 has a hollow columnar structure, and its bottom is welded and fixed to the mounting base 12. The mounting base 12 has fixing holes, which facilitates fastening to the workbench or ground with expansion bolts, ensuring the stability of the device during calibration. The inner cavity of the support column 11 has an axially oriented mounting groove 13. The size of the mounting groove 13 is adapted to the first hydraulic telescopic rod 31 of the calibration component 3, providing a stable mounting space for the calibration component 3.

[0035] Rotating assembly 2 is the core component for achieving multi-angle adjustment and fixation of the cylinder head. It consists of an axial rotating component 21, a horizontal rotating component 22, and a clamping component 23. These three components work together to complete the positioning, flipping, and clamping of the cylinder head. The axial rotating component 21 is fixed to the top of the support column 11. The first motor 211 is fixed to the top surface of the support column 11 by bolts, and its output shaft is welded to the center of the connecting plate 212. The connecting plate 212 adopts a rectangular steel plate structure, and the second hydraulic telescopic rods 213 are symmetrically fixed to both sides of the back by bolts. The output shaft of the second hydraulic telescopic rod 213 passes through the through hole of the connecting plate 212 and is welded to the support plate 214. By driving the connecting plate 212 to rotate around the vertical axis, the first motor 211 can achieve axial adjustment of 100° and other angles. The extension and retraction of the second hydraulic telescopic rod 213 can drive the support plate 214 to move in the horizontal direction, which can be adapted to cylinder heads of different lengths.

[0036] The horizontal rotating component 22 is fixed to the surface of the support plate 214. Symmetrically arranged third hydraulic telescopic rods 221 on both sides are fastened to the support plate 214 with bolts. The output end of one third hydraulic telescopic rod 221 is fixed to the base of the second motor 222, and the output shaft of the second motor 222 is connected to the input end of the reducer 223. The output end of the reducer 223 is welded to the rotating shaft 224. The output end of the other third hydraulic telescopic rod 221 is rotatably connected to the follower shaft 225 via a bearing. The axes of the rotating shaft 224 and the follower shaft 225 are collinear, and their outer diameters are adapted to the through-hole sizes at both ends of the engine cylinder head. The support base 226 at the bottom of the second motor 222 slides into a groove on the surface of the connecting plate 212, providing guidance for the horizontal movement of the second motor 222 and preventing deviation.

[0037] The internal structure of the rotating shaft 224 and the follower shaft 225 is identical, both housing a third motor 227. The third motor 227 is bolted to the mounting base 12 within the shaft's internal cavity, and its output shaft is welded to the transmission shaft 228. The driving bevel gear 229 fixed to the surface of the transmission shaft 228 meshes with the driven bevel gear 2210. The driven bevel gear 2210 is welded to one end of the first lead screw 2211, and the other end of the first lead screw 2211 is rotatably connected to the inner wall of the shaft via a bearing seat. The threaded tube 2212 on the surface of the first lead screw 2211 penetrates a rectangular through hole on the surface of the shaft. The fit between the threaded tube 2212 and the rectangular through hole restricts the rotational freedom of the threaded tube 2212, allowing it to move only in the horizontal direction. The outer end of the threaded tube 2212 is welded to an arc-shaped plate 2213. A rubber plate 2214 is bonded to the surface of the arc-shaped plate 2213 with adhesive. The surface of the rubber plate 2214 has anti-slip textures, which both improves the fixing friction and avoids damage to the inner wall of the cylinder head from rigid contact.

[0038] The clamping member 23 is fixed to the surfaces of the rotating shaft 224 and the follower shaft 225. The fixing plate 231 is fixed to the shaft body by bolts. The moving grooves 232 at the four corners of the fixing plate 231 provide sliding tracks for the clamping plate 233. Threaded holes are opened on one side of the upper and lower clamping plates 233, which cooperate with the upper and lower second lead screws 234 with reverse threads. The two ends of the second lead screws 234 are rotatably connected to the fixing plate 231 through bearing seats, and the middle is welded to the output shaft of the fourth motor 235. The fourth motor 235 is fixed to the side of the fixing plate 231 by bolts. The other side of the clamping plate 233 is slidably engaged with the limiting rod 236. The two ends of the limiting rod 236 are fixed to the fixing plate 231 through bearing seats, further restricting the movement direction of the clamping plate 233. Through holes corresponding to the cylinder head holes are opened on the surface of the clamping plate 233 to avoid obstructing the holes and affecting calibration. Anti-slip rubber pads are bonded to the clamping surface to enhance clamping stability.

[0039] The calibration assembly 3 is fixed in the mounting groove 13 of the support column 11. The top of the first hydraulic telescopic rod 31 is fixed to the inner wall of the mounting groove 13 by bolts, and the bottom is welded to the mounting plate 32. A CCD camera 33 is fixed to the top surface of the mounting plate 32 by bolts. The shooting direction of the CCD camera 33 is vertically upward, aligned with the calibration hole at the bottom of the cylinder head. The infrared rangefinder 34 is fixed to the bottom of the first motor 211 by the bracket 1. Its detection direction is vertically downward, corresponding to the shooting area of ​​the CCD camera 33, and is used to detect the distance between the cylinder head and the mounting plate 32 in real time.

[0040] A method for using a hole alignment device for machining an automotive engine cylinder head includes the following steps: S1. The engine cylinder head is hoisted to the installation position of this device using a small crane. Then, the output shaft of the third hydraulic telescopic rod 221 drives the second motor 222, reducer 223, rotating shaft 224 and follower shaft 225 to move, and the rotating shaft 224 and follower shaft 225 are inserted into the through holes at both ends of the engine cylinder head. S2. Then, by starting the third motor 227, the third motor 227 drives the transmission shaft 228 to rotate, the transmission shaft 228 drives the driving bevel gear 229 to rotate, the driving bevel gear 229 drives the driven bevel gear 2210 to rotate, the driven bevel gear 2210 drives the first lead screw 2211 to rotate, the first lead screw 2211 drives the solenoid 2212 to move, and the solenoid 2212 drives the arc plate 2213 and the rubber plate 2214 to expand outward, so that the rotating shaft 224 and the follower shaft 225 can be firmly fixed in the inner cavity of the engine cylinder head. S3. Then, by starting the fourth motor 235, the fourth motor 235 drives the upper and lower second lead screws 234 to rotate. The second lead screws 234 drive the upper and lower clamping plates 233 to move relative to each other, thus firmly fixing the engine cylinder head. At this time, the bottom of the engine cylinder head is facing down. Then, by starting the infrared rangefinder 34, the distance between the mounting plate 32 and the engine cylinder head is detected. If it meets the calibration parameters, the CCD camera 33 can be started to take pictures to calibrate the hole position. If it does not meet the calibration parameters, the first hydraulic telescopic rod 31 is started to move the mounting plate 32, thereby moving the CCD camera 33. After moving to the parameter position, the retraction of the first hydraulic telescopic rod 31 can be stopped, and then the picture detection work can be carried out. S4. After the current position detection is completed, the second motor 222 is started. The second motor 222 drives the rotating shaft 224 to rotate through the reducer 223. The rotating shaft 224 drives the engine cylinder head and the follower shaft 225 to rotate together by 90°. Then, the infrared rangefinder 34 is started to detect the distance between the mounting plate 32 and the engine cylinder head. After adjustment, the measurement is taken and calibrated. Similarly, the hole position calibration work can be carried out on the other two sides of the engine cylinder head. S5. When it is necessary to calibrate the side holes of the engine cylinder head, release the clamping part 23 on one side, and then retract the corresponding third hydraulic telescopic rod 221. The third hydraulic telescopic rod 221 drives the follower shaft 225 to move. After the follower shaft 225 moves, the third motor 227 inside it reverses to release the expansion and fixing state. When the follower shaft 225 is separated from the engine cylinder head, the corresponding second hydraulic telescopic rod 213 drives the support plate 214 and the follower shaft 225 of the third hydraulic telescopic rod 221 to retract to the surface of the connecting plate 212. Then, by starting the first motor 211, the connecting plate 212 is rotated 90° so that the side separated from the follower shaft 225 faces down. Then the adjustment work can be carried out, and the hole calibration and testing work can be carried out. S6. After the previous hole position calibration test is completed, restore the engine cylinder head to its original position, and then fix the follower shaft 225 and the corresponding clamping part 23 back to the surface of the engine cylinder head, contact the clamping part 23 and the rotating shaft 224 on the other side of the engine cylinder head, and then rotate the surface to be tested downward by rotating the first motor 211, and then the adjustment work can be carried out, and then the hole position calibration test work can be carried out. At this time, all hole position calibration tests of the engine cylinder head can be completed.

[0041] The preferred embodiments of the present invention disclosed above are only for the purpose of illustrating the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation described herein. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A hole alignment device for machining an automobile engine cylinder head, comprising a bracket (1), characterized in that: A rotating component (2) is fixedly connected to the top of the bracket (1), and a calibration component (3) is fixedly connected to the inner cavity of the bracket (1). The bracket (1) includes a support column (11), and a mounting base (12) is fixedly connected to the bottom of the support column (11). The inner cavity of the support column (11) is provided with a mounting groove (13). The rotating assembly (2) includes an axial rotating component (21) fixedly connected to the top of the support column (11), a horizontal rotating component (22) fixedly connected to the surface of the axial rotating component (21), and a clamping component (23) fixedly connected to the other side of the horizontal rotating component (22). The calibration component (3) includes a first hydraulic telescopic rod (31) fixedly connected to the inner cavity of the mounting slot (13), a mounting plate (32) fixedly connected to the bottom of the first hydraulic telescopic rod (31), and a CCD camera (33) fixedly connected to the top of the mounting plate (32).

2. The hole alignment device for machining an automobile engine cylinder head according to claim 1, characterized in that: The axial rotating component (21) includes a first motor (211) fixedly connected to the top of the support column (11). The output shaft of the first motor (211) is fixedly connected to a connecting plate (212). The two sides of the back of the connecting plate (212) are fixedly connected to a second hydraulic telescopic rod (213). The output shaft of the second hydraulic telescopic rod (213) passes through the surface of the connecting plate (212) and is fixedly connected to a support plate (214).

3. The hole alignment device for machining an automobile engine cylinder head according to claim 1, characterized in that: The horizontal rotating component (22) includes a third hydraulic telescopic rod (221) fixedly connected to the surface of the support plate (214). The output end of one of the third hydraulic telescopic rods (221) is fixedly connected to a second motor (222). The output shaft of the second motor (222) is fixedly connected to a reducer (223). The output shaft of the reducer (223) is fixedly connected to a rotating shaft (224). The output end of the other third hydraulic telescopic rod (221) is fixedly connected to a follower shaft (225) via a bearing. The bottom of the second motor (222) is fixedly connected to a support base (226). The other side of the support base (226) is slidably connected to the connecting plate (212).

4. The hole alignment device for machining an automobile engine cylinder head according to claim 3, characterized in that: The rotating shaft (224) and the follower shaft (225) are inserted into the inner cavity of the engine cylinder head, and a third motor (227) is fixedly connected to the inner cavity of both the rotating shaft (224) and the follower shaft (225). The output shaft of the third motor (227) is fixedly connected to a transmission shaft (228). A driving bevel gear (229) is fixedly connected to the surface of the transmission shaft (228). A driven bevel gear (2210) meshes with the surface of the driving bevel gear (229). The surface of the driven bevel gear (2210) is... A first lead screw (2211) is fixedly connected. The inner walls of the rotating shaft (224) and the follower shaft (225) are fixedly connected to the first lead screw (2211) through bearing seats. A screw tube (2212) is threadedly connected to the surface of the first lead screw (2211). The other end of the screw tube (2212) passes through the outside of the rotating shaft (224) and the follower shaft (225) and is fixedly connected to an arc plate (2213). A rubber plate (2214) is bonded to the surface of the arc plate (2213) by an adhesive.

5. The hole alignment device for machining an automobile engine cylinder head according to claim 4, characterized in that: The surfaces of the rotating shaft (224) and the follower shaft (225) are provided with through holes for the solenoid (2212) to pass through, and the through holes and the solenoid (2212) are rectangular.

6. The hole alignment device for machining an automobile engine cylinder head according to claim 3, characterized in that: The clamping member (23) includes a fixed plate (231) fixedly connected to the surface of the rotating shaft (224) and the follower shaft (225). The fixed plate (231) has a moving groove (232) at each of its four corners. The inner cavity of the moving groove (232) is slidably connected to a clamping plate (233). A second lead screw (234) is threadedly connected to one side of the upper and lower clamping plates (233). A fourth motor (235) is fixedly connected between the upper and lower second lead screws (234). The fourth motor (235) is fixedly connected to the fixed plate (231) by bolts. A limit rod (236) is slidably connected to the other side of the upper and lower clamping plates (233). The limit rod (236) is fixedly connected to the fixed plate (231) by a bearing seat.

7. The hole alignment device for machining an automobile engine cylinder head according to claim 6, characterized in that: The clamping plate (233) is clamped on the surface of the engine cylinder head, and its surface is provided with through holes corresponding to the holes on the surface of the engine cylinder head.

8. The hole position calibration device for machining an automobile engine cylinder head according to claim 6, characterized in that: The inner cavity of the clamping plate (233) is provided with a threaded hole for use with the second lead screw (234), and the threads on the surfaces of the upper and lower second lead screws (234) are designed in opposite directions.

9. The hole position calibration device for machining an automobile engine cylinder head according to claim 1, characterized in that: The calibration component (3) also includes an infrared rangefinder (34) fixedly connected to the bottom of the first motor (211).

10. A method of using a hole alignment device for machining an automobile engine cylinder head, characterized in that: Includes the following steps: S1. The engine cylinder head is hoisted to the installation position of this device by a small crane. Then, the output shaft of the third hydraulic telescopic rod (221) drives the second motor (222), reducer (223), rotating shaft (224) and follower shaft (225) to move, and the rotating shaft (224) and follower shaft (225) are inserted into the through holes at both ends of the engine cylinder head. S2. Then, by starting the third motor (227), the third motor (227) drives the transmission shaft (228) to rotate, the transmission shaft (228) drives the active bevel gear (229) to rotate, the active bevel gear (229) drives the driven bevel gear (2210) to rotate, the driven bevel gear (2210) drives the first lead screw (2211) to rotate, the first lead screw (2211) drives the solenoid (2212) to move, and the solenoid (2212) drives the arc plate (2213) and the rubber plate (2214) to expand outward, so that the rotating shaft (224) and the follower shaft (225) can be firmly fixed in the inner cavity of the engine cylinder head; S3. Then, by starting the fourth motor (235), the fourth motor (235) drives the upper and lower second lead screws (234) to rotate. The second lead screws (234) drive the upper and lower clamping plates (233) to move relative to each other, thus firmly fixing the engine cylinder head. At this time, the bottom of the engine cylinder head is facing down. Then, by starting the infrared rangefinder (34), the distance between the mounting plate (32) and the engine cylinder head is detected. If it meets the calibration parameters, the hole position calibration work can be carried out by starting the CCD camera (33) to take pictures. If it does not meet the calibration parameters, the mounting plate (32) is moved by starting the first hydraulic telescopic rod (31), thereby moving the CCD camera (33). After moving to the parameter position, the retraction of the first hydraulic telescopic rod (31) can be stopped, and then the picture detection work can be carried out. S4. After the current position detection is completed, the second motor (222) is started. The second motor (222) drives the rotating shaft (224) to rotate through the reducer (223). The rotating shaft (224) drives the engine cylinder head and the follower shaft (225) to rotate together by 90°. Then, the distance between the mounting plate (32) and the engine cylinder head is detected by starting the infrared rangefinder (34). After adjustment, the measurement is taken and calibrated. Similarly, the hole positions of the other two sides of the engine cylinder head can be calibrated. S5. When it is necessary to calibrate the side holes of the engine cylinder head, release the clamping part (23) on one side, and then retract the corresponding third hydraulic telescopic rod (221). The third hydraulic telescopic rod (221) drives the follower shaft (225) to move. After the follower shaft (225) moves, the third motor (227) inside it reverses to release the expansion and fixation state. When the follower shaft (225) is separated from the engine cylinder head, the corresponding second hydraulic telescopic rod (213) drives the support plate (214) and the follower shaft (225) of the third hydraulic telescopic rod (221) to retract to the surface of the connecting plate (212). Then, by starting the first motor (211), the connecting plate (212) is rotated 90° so that the side separated from the follower shaft (225) faces down. Then the adjustment work can be carried out, and the hole calibration and testing work can be carried out. S6. After the previous hole calibration test is completed, restore the engine cylinder head to its original position, and then fix the follower shaft (225) and the corresponding clamping part (23) on the surface of the engine cylinder head, contact the clamping part (23) and the rotating shaft (224) on the other side of the engine cylinder head, and then rotate the surface to be tested downward by rotating the first motor (211), and then the adjustment work can be carried out, and then the hole calibration test work can be carried out. At this time, the calibration test work of all holes of the engine cylinder head can be completed.

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