A turning method for a diesel engine flywheel

Abstract

The present invention relates to the technical field of flywheel processing, specifically to a turning method for a diesel engine flywheel, comprising the following steps: S1, fixing a flywheel with a weight-reducing hole on a turntable, wherein the distance between the axis of the weight-reducing hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder and the axis of the drill cylinder; S2, the drill cylinder drives the movable plate and the movable cylinder to rotate, the movable cylinder is in the first position, and the drill cylinder is facing the weight-reducing hole; S3, the mounting seat moves and drives the turntable to rotate 60°, the positioning rod is inserted into the shaft hole, the movable cylinder shrinks, and moves from the first position to the second position; S4, the movable cylinder moves to insert the positioning rod into the weight-reducing hole, fix the flywheel, and the drill cylinder drills the next weight-reducing hole on the flywheel; S5, repeating the operation and performing positioning work before each drilling. The turning method for a diesel engine flywheel provided by the invention has a movable plate cooperating with the positioning rod to position the flywheel each time the processing is performed, thereby avoiding the accumulation of errors during multiple operations and improving the drilling accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of flywheel processing, and in particular to a turning processing method for a diesel engine flywheel. Background Art

[0002] The flywheel is a disc-shaped part with a large rotational inertia. It is one of the important components of a diesel engine. During the rotation process, the flywheel can rely on its rotational inertia to drive the crankshaft to rotate to pass the mechanical dead point of the engine.

[0003] According to the publication (announcement) number CN116700138A, the publication (announcement) date is 2023.09.05, and a flywheel pin hole processing method is disclosed, the method steps are as follows: Step 1: determine the coordinate origin; Step 2: determine the coordinates of the hole opening position; Step 3: select a reference point; Step 4: calculate the moving path; Step 5: repeat the processing operation; determine the coordinate origin, mainly determine the center of the flywheel as the coordinate origin (0, 0); determine the coordinates of the hole opening position, mainly determine the coordinates (Xn, Yn) of the positions on the flywheel where the holes need to be opened, where n is a positive Integer; select a reference point, select a reference point outside the flywheel, and its coordinates are (X0, Y0); calculate the moving path, calculate the vector from the reference point to each pin hole position to determine the path of the tool movement when processing each pin hole; repeat the processing operation, place the tool at the reference point position, the tool first moves along the path of the first pin hole to process the first pin hole, and returns to the reference point position after the processing is completed. The tool then moves along the path of the second pin hole to process the second pin hole, and returns to the reference point position after the processing is completed. Repeat the above operation until all pin holes are processed. When processing pin holes, each time it moves from the reference point to the processing position, that is, it starts from the reference position and moves according to the pre-set path to ensure the processing accuracy.

[0004] In the prior art including the above patents, one of the steps in the flywheel processing process is to punch holes in the flywheel. The main purpose of punching holes in the flywheel is to reduce the weight of the flywheel and thereby reduce the density of the flywheel. At the same time, it is convenient to adjust the dynamic balance of the flywheel to make the rotation of the flywheel more balanced. Most of the existing processing methods first determine the position of the first weight-reducing hole on the flywheel, and then move the drill barrel a predetermined distance to the next punching point according to the position of the weight-reducing hole, repeat the operation, and complete the punching work. However, in actual work, each movement of the drill barrel has errors. During multiple movements, the errors in the position of the drill barrel accumulate, resulting in inaccurate positioning of subsequent punching holes, which is not conducive to the dynamic balance adjustment of the flywheel. Summary of the invention

[0005] The purpose of the present invention is to provide a turning method for a diesel engine flywheel, aiming to solve the above-mentioned problem.

[0006] In order to achieve the above object, the present invention provides a turning method for a diesel engine flywheel, comprising a frame, on which is provided:

[0007] A mounting seat, on which a turntable for fixing the flywheel is movably arranged;

[0008] Drill barrel;

[0009] The positioning assembly comprises a movable plate movably mounted on the drill tube, a movable cylinder movably arranged on the movable plate, and positioning rods distributed in a circumferential array are arranged on the movable cylinder, wherein the movable cylinder comprises a first position and a second position:

[0010] In the first position, the angle between the movable plate and the horizontal plane is 30°, and the movable cylinder is directly opposite to the flywheel shaft hole;

[0011] In the second position, the movable plate is perpendicular to the horizontal plane, and the movable cylinder is directly opposite to the weight-reducing hole;

[0012] The following steps are also included:

[0013] S1. Fix a flywheel with a weight-reducing hole on a turntable, wherein the distance between the axis of the weight-reducing hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder and the axis of the drill cylinder;

[0014] S2, the drill tube drives the movable plate and the movable tube to rotate, the movable tube is in the first position, and the drill tube is facing the weight-reducing hole;

[0015] S3, the mounting seat moves and drives the turntable to rotate 60°, the positioning rod is inserted into the shaft hole, the movable cylinder shrinks, and moves from the first position to the second position;

[0016] S4, the movable cylinder moves to insert the positioning rod into the weight-reducing hole, fix the flywheel, and the drill cylinder drills the next weight-reducing hole on the flywheel;

[0017] S5. Repeat the operation and perform positioning work before each drilling to process multiple weight-reducing holes.

[0018] Preferably, a pair of locking blocks for locking the drill tube and the movable tube respectively are movably provided on the movable plate, and the turntable moves to a predetermined position to unlock the drill tube and the movable tube.

[0019] Preferably, a trigger rod is provided on the movable plate, a first pull rope is provided between the trigger rod and the two locking blocks, and the rotating disk pushes the trigger rod to move the locking blocks.

[0020] Preferably, a movable rod is provided on the mounting seat, and a guide block for pushing the turntable to rotate is provided on the movable rod, and the movable rod moves relative to the mounting seat to rotate the turntable by a predetermined angle.

[0021] Preferably, six guide grooves adapted to the guide blocks are provided on the outer wall of the turntable, and the plurality of guide grooves are connected end to end, and the guide grooves include an inclined portion and a straight portion, and a baffle for pushing the movable rod is provided on the frame.

[0022] Preferably, a driving disk for driving the plurality of positioning rods to move is rotatably disposed inside the movable cylinder, and a first capstan and a second capstan are coaxially distributed and used to drive the driving disk to rotate.

[0023] Preferably, when the movable cylinder is in the first position, the movable cylinder moves relative to the movable plate so that the first capstan drives the driving disk to rotate.

[0024] Preferably, when the movable cylinder is in the second position, the movable cylinder moves relative to the movable plate so that the second capstan drives the driving disk to rotate.

[0025] Preferably, the first capstan is composed of first sliding bars distributed on the driving disc in a linear array, and a plurality of the first sliding bars move to make the diameter of the first capstan adjustable.

[0026] Preferably, the second capstan is composed of second sliding bars distributed on the driving disc in a linear array, and a plurality of the second sliding bars are movable to make the diameter of the second capstan adjustable.

[0027] In the above technical scheme, a turning processing method for a diesel engine flywheel provided by the present invention has the following beneficial effects: when processing the flywheel, a flywheel with a weight reduction hole is fixed on a turntable, and the distance between the axis of the weight reduction hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder and the axis of the drill cylinder. The drill cylinder drives the movable plate and the movable cylinder to rotate, and the movable cylinder is in a first position, that is, the angle between the movable plate and the horizontal plane is 30°, the movable cylinder is facing the flywheel shaft hole, and the drill cylinder is facing the weight reduction hole. The mounting seat moves and drives the turntable to rotate 60°, the positioning rod is inserted into the shaft hole, the movable cylinder contracts, and moves from the first position to the second position, that is, the movable plate is perpendicular to the horizontal plane, and the movable cylinder is facing the weight reduction hole. The movable cylinder moves to insert the positioning rod into the weight reduction hole, fix the flywheel, and the drill cylinder drills the next weight reduction hole on the flywheel. The operation is repeated and positioning work is performed before each drilling. Multiple weight reduction holes are processed, and each time the processing is performed, the movable plate cooperates with the positioning rod to position the flywheel, thereby avoiding error accumulation during multiple operations and improving the drilling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of a positioning assembly provided in an embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a first tenon block provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the internal structure of a movable plate provided in an embodiment of the present invention;

[0033] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 A schematic diagram of the internal structure of a movable cylinder provided in an embodiment of the present invention;

[0035] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0036] Figure 8 A schematic diagram of the structure of a drive disk provided in an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the internal structure of a drive disk provided in an embodiment of the present invention;

[0038] Fig.10 for Fig. 9 Enlarged view of point C in the middle;

[0039] Fig.11 A schematic structural diagram of a guide groove provided in an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 1. Positioning assembly; 11. movable plate; 111. trigger lever; 112. locking block; 113. first pull rope; 114. first magnet; 115. second magnet; 116. second pull rope; 117. third pull rope; 12. movable cylinder; 121. drive disk; 1211. first capstan; 1212. second capstan; 1213. first drive ring; 1214. second drive ring; 1215. first slide bar; 1216. second slide bar; 122. guide To block; 123, positioning rod; 124, movable tube; 125, shaft rod; 126, bevel gear; 127, fourth pull rope; 2, frame; 21, mounting seat; 211, turntable; 212, three-jaw chuck; 213, movable rod; 214, baffle; 215, guide block; 216, guide groove; 217, straight part; 218, oblique part; 219, baffle; 22, first tenon block; 23, second tenon block; 24, holder; 25, drill tube; 26, fixing plate. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] like Figure 1-11 As shown, a method for turning a diesel engine flywheel includes a frame 2, on which is disposed:

[0044] A mounting seat 21 on which a rotating disc 211 for fixing the flywheel is movably disposed;

[0045] Drill barrel 25;

[0046] The positioning assembly 1 comprises a movable plate 11 movably mounted on a drill tube 25, a movable cylinder 12 movably arranged on the movable plate 11, and positioning rods 123 distributed in a circumferential array are arranged on the movable cylinder 12, wherein the movable cylinder 12 comprises a first position and a second position:

[0047] In the first position, the angle between the movable plate 11 and the horizontal plane is 30°, and the movable cylinder 12 faces the flywheel shaft hole;

[0048] In the second position, the movable plate 11 is perpendicular to the horizontal plane, and the movable cylinder 12 is facing the weight-reducing hole;

[0049] The following steps are also included:

[0050] S1. Fix a flywheel with a lightening hole on the turntable 211. The distance between the axis of the lightening hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder 12 and the axis of the drill cylinder 25.

[0051] S2, the drill tube 25 drives the movable plate 11 and the movable cylinder 12 to rotate, the movable cylinder 12 is in the first position, and the drill tube 25 is facing the weight-reducing hole;

[0052] S3, the mounting seat 21 moves and drives the rotating disk 211 to rotate 30°, the positioning rod 123 is inserted into the shaft hole, the movable cylinder 12 shrinks, and moves from the first position to the second position;

[0053] S4, the movable cylinder 12 moves to insert the positioning rod 123 into the weight-reducing hole, fix the flywheel, and the drill cylinder 25 drills the next weight-reducing hole on the flywheel;

[0054] S5. Repeat the operation and perform positioning work before each drilling to process multiple weight-reducing holes.

[0055] Specifically, a holder 24 (equivalent to the spindle on a lathe, which is a prior art and will not be described in detail) for fixing a drill tube 25 is rotatably provided on the frame 2, a movable plate 11 is rotatably mounted on the holder 24, a movable cylinder 12 is slidably mounted on the movable plate 11, a guide block 122 extending to the inside of the movable plate 11 is provided on the movable cylinder 12, a three-jaw chuck 212 for fixing a flywheel is provided on the turntable 211, a first tenon block 22 and a tenon groove adapted to the first tenon block 22 are provided on the frame 2, and a sliding arrangement is provided on the first tenon block 22. There is a second tenon block 23, a tenon groove matching the second tenon block 23 is opened on the first tenon block 22, a bolt for fixing the second tenon block 23 is arranged on the first tenon block 22, a first electric telescopic rod is arranged between the first tenon block 22 and the frame 2, the mounting seat 21 is movably mounted on the second tenon block 23, a second electric telescopic rod is arranged between the second tenon block 23 and the mounting seat 21, a fixing plate 26 perpendicular to the horizontal plane and used to block the movable plate 11 is arranged on the frame 2, and a rotation damping is arranged between the turntable 211 and the mounting seat 21.

[0056] Furthermore, when processing the flywheel, a three-jaw chuck 212 is used to fix the flywheel with a weight-reducing hole on the turntable 211. The distance between the axis of the weight-reducing hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder 12 and the axis of the drill cylinder 25. The chuck drives the drill cylinder 25 and the movable plate 11 to rotate, so that the movable cylinder 12 is in the first position, that is, the angle between the movable plate 11 and the horizontal plane is 30°. The position of the second tenon block 23 relative to the first tenon block 22 and the height of the mounting seat 21 are adjusted so that the flywheel shaft hole faces the movable cylinder 12, and the drill cylinder 25 faces the weight-reducing hole on the flywheel. The first electric telescopic rod pushes the first tenon block 22 to move with the mounting seat 21. The turntable 211 rotates 60° relative to the mounting seat 21, and the first tenon block 22 continues to move. The positioning rod 123 on the movable cylinder 12 is inserted into the shaft hole. The positioning rod 123 rests on the side wall of the flywheel shaft hole, so that the flywheel and the movable cylinder 12 are on the same axis. Then the movable cylinder 12 contracts and moves toward the inside of the movable plate 11, and the positioning rod 123 separates from the flywheel. Then the movable plate 11 rotates relative to the holder 24, and the movable cylinder 12 moves from the first position to the second position, that is, the movable plate 11 is perpendicular to the horizontal plane, and the movable cylinder 12 is facing the weight reduction hole. The movable cylinder 12 moves toward the outside of the movable plate 11, so that the positioning rod 123 is inserted into the weight reduction hole to fix the flywheel. The drill cylinder 25 drills the next weight reduction hole on the flywheel, repeats the operation, and performs positioning before each drilling. Multiple weight reduction holes are processed. Each time processing is performed, the movable plate 11 cooperates with the positioning rod 123 to position the flywheel, so as to avoid error accumulation during multiple operations and improve the drilling accuracy.

[0057] In the above technical solution, when processing the flywheel, the flywheel with a weight-reducing hole is fixed on the turntable 211, and the distance between the axis of the weight-reducing hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder 12 and the axis of the drill cylinder 25. The drill cylinder 25 drives the movable plate 11 and the movable cylinder 12 to rotate. The movable cylinder 12 is in the first position, that is, the angle between the movable plate 11 and the horizontal plane is 30°, the movable cylinder 12 is facing the flywheel shaft hole, the drill cylinder 25 is facing the weight-reducing hole, the mounting seat 21 moves and drives the turntable 211 to rotate 60°, and the positioning rod 123 Insert the shaft hole, the movable cylinder 12 contracts, and moves from the first position to the second position, that is, the movable plate 11 is perpendicular to the horizontal plane, the movable cylinder 12 is opposite to the weight-reducing hole, the movable cylinder 12 moves to insert the positioning rod 123 into the weight-reducing hole, fix the flywheel, and the drill cylinder 25 drills the next weight-reducing hole on the flywheel. Repeat the operation and perform positioning before each drilling. Process multiple weight-reducing holes. Each time processing is performed, the movable plate 11 cooperates with the positioning rod 123 to position the flywheel, so as to avoid error accumulation during multiple operations and improve the drilling accuracy.

[0058] As a further embodiment of the present invention, a pair of locking blocks 112 for locking the drill tube 25 and the movable tube 12 are movably provided on the movable plate 11, and the turntable 211 moves to a predetermined position to unlock the drill tube 25 and the movable tube 12.

[0059] Specifically, a spring is provided between the locking block 112 and the movable plate 11 , the holder 24 is provided with grooves distributed in a circumferential array and adapted to the locking block 112 , and a spring is provided between the movable cylinder 12 and the movable plate 11 .

[0060] Furthermore, when the movable cylinder 12 is in the first position, the locking blocks 112 extend from the movable plate 11, and one of the locking blocks 112 abuts against the lower side of the movable cylinder 12 (such as Figure 5 As shown in the figure), to prevent the movable cylinder 12 from moving into the movable plate 11, another locking block 112 is inserted into the groove on the holder 24, spanning the movable plate 11 and the holder 24, and the movable plate 11 can rotate with the holder 24 at this time; when the mounting seat 21 moves to a predetermined position with the turntable 211, the locking block 112 retracts into the movable plate 11, so that the drill cylinder 25 and the movable cylinder 12 are unlocked.

[0061] As another embodiment further provided by the present invention, a trigger rod 111 is provided on the movable plate 11 , a first pull rope 113 is provided between the trigger rod 111 and the two locking blocks 112 , and the rotating disk 211 pushes the trigger rod 111 to move the locking blocks 112 .

[0062] Specifically, a spring is provided between the trigger rod 111 and the movable plate 11 . The trigger rod 111 is specifically a self-elastic telescopic rod. A ball is provided at the end of the trigger rod 111 for reducing friction between the trigger rod 111 and the flywheel.

[0063] Furthermore, when the mounting seat 21 brings the turntable 211 and the flywheel closer to the drill barrel 25, the trigger rod 111 on the movable plate 11 will first come into contact with the flywheel, and the trigger rod 111 pulls the first pull rope 113, which drives the locking block 112 to move toward the inside of the movable plate 11, thereby unlocking the drill barrel 25 and the movable barrel 12.

[0064] As another embodiment further provided by the present invention, a movable rod 213 is disposed on the mounting seat 21. The movable rod 213 is provided with a guide block 215 for pushing the turntable 211 to rotate. The movable rod 213 moves relative to the mounting seat 21 to rotate the turntable 211 by a predetermined angle.

[0065] Specifically, when the mounting seat 21 moves with the turntable 211 away from the drill barrel 25, the movable rod 213 moves relative to the mounting seat 21, and the guide block 215 on the movable rod 213 pushes the turntable 211 to rotate 60° with the flywheel relative to the mounting seat 21, so that the next drilling point is opposite to the drill barrel 25.

[0066] Furthermore, the predetermined angle in the above embodiment is specifically 60°.

[0067] As another embodiment further provided by the present invention, six guide grooves 216 adapted to the guide block 215 are opened on the outer wall of the turntable 211, and the multiple guide grooves 216 are connected end to end. The guide grooves 216 include an inclined portion 218 and a straight portion 217, and a baffle 214 for pushing the movable rod 213 is provided on the frame 2.

[0068] Specifically, a baffle 219 is provided at the connection between the inclined portion 218 and the straight portion 217. The baffle 219 is hinged on the turntable 211 and a torsion spring is provided between the baffle 219 and the turntable 211. The baffle 219 blocks the guide block 215 from moving along the original route (this is the prior art and will not be repeated). There are specifically two baffles 214, and the two baffles 214 are respectively used to push the two ends of the movable rod 213.

[0069] Furthermore, when the mounting seat 21 moves with the turntable 211 away from the drill barrel 25, the movable rod 213 approaches the baffle 214 and gradually contacts the baffle 214, and the baffle 214 pushes the movable rod 213 to move relative to the mounting seat 21, and the guide block 215 on the movable rod 213 moves along the inclined portion 218 of the guide groove 216, thereby pushing the turntable 211 and the flywheel to rotate 60° relative to the mounting seat 21, so that the next punching point is opposite to the drill barrel 25. When the mounting seat 21 moves to the end of the mortise and tenon groove and moves towards the drill barrel 25, the other baffle 214 pushes the other end of the movable rod 213, and the guide block 215 on the movable rod 213 moves along the straight portion 217 of the guide groove 216, which will prevent the turntable 211 from rotating relative to the mounting seat 21.

[0070] As another embodiment further provided by the present invention, the movable cylinder 12 is internally rotatably provided with a driving disk 121 for driving the plurality of positioning rods 123 to move, and the driving disk 121 is provided with a first capstan 1211 and a second capstan 1212 which are coaxially distributed and used for driving the driving disk 121 to rotate.

[0071] Specifically, a protrusion is provided on the positioning rod 123, a sliding groove adapted to the protrusion is provided on the movable cylinder 12, a flat thread is provided on the driving disk 121, a sliding groove adapted to the flat thread is provided on the protrusion, and a slope is provided at the end of the positioning rod 123 to facilitate its insertion into the hole on the flywheel.

[0072] Furthermore, when it is necessary to adjust the spacing of the positioning rods 123 to adapt to the axial hole and the weight-reducing hole on the flywheel, the first capstan 1211 or the second capstan 1212 is driven to drive the drive disk 121 to rotate, and the planar thread on the drive disk 121 moves along the slide groove on the protrusion, thereby causing the planar thread to push the protrusion and the positioning rod 123 to move along the slide groove on the movable cylinder 12, so that the spacing of the positioning rods 123 adapts to the diameter of the hole on the flywheel.

[0073] As another embodiment further provided by the present invention, when the movable cylinder 12 is in the first position, the movable cylinder 12 moves relative to the movable plate 11 so that the first capstan 1211 drives the driving plate 121 to rotate.

[0074] Specifically, a first magnet 114 is provided on the movable plate 11, a second pull rope 116 is coiled on the first capstan 1211 and an end of the second pull rope 116 is fixed on the first magnet 114, a cavity for the first magnet 114 to move is opened in the inner wall of the movable plate 11, a third magnet is provided on the frame 2, which is opposite to the first position of the movable cylinder 12 and cooperates with the first magnet 114, and a torsion spring is provided between the driving disk 121 and the movable cylinder 12.

[0075] Furthermore, when the movable cylinder 12 is in the first position and moves toward the outside of the movable plate 11, the first magnet 114 is attracted to the third magnet on the frame 2, and the distance between the first magnet 114 and the movable cylinder 12 increases. The first magnet 114 drives the first capstan 1211 to rotate through the second pull rope 116, and the first capstan 1211 drives the driving disk 121 to rotate relative to the movable cylinder 12. The driving disk 121 drives the positioning rod 123 on the movable cylinder 12 to move, thereby changing the distance between the positioning rods 123 to adapt to the diameter of the flywheel shaft hole.

[0076] As another embodiment further provided by the present invention, when the movable cylinder 12 is in the second position, the movable cylinder 12 moves relative to the movable plate 11 so that the second capstan 1212 drives the driving plate 121 to rotate.

[0077] Specifically, a second magnet 115 is provided on the movable plate 11, a third pull rope 117 is coiled on the second capstan 1212 and the end of the third pull rope 117 is fixed on the second magnet 115, a cavity for the second magnet 115 to move is opened in the inner wall of the movable plate 11, and a fourth magnet is provided on the frame 2, which is opposite to the second position of the movable cylinder 12 and cooperates with the second magnet 115.

[0078] Furthermore, when the movable cylinder 12 is in the second position and moves toward the outside of the movable plate 11, the second magnet 115 is attracted to the fourth magnet on the frame 2, and the distance between the second magnet 115 and the movable cylinder 12 increases. The second magnet 115 drives the second capstan 1212 to rotate through the third pull rope 117, and the second capstan 1212 drives the driving disk 121 to rotate relative to the movable cylinder 12. The driving disk 121 drives the positioning rod 123 on the movable cylinder 12 to move, thereby changing the distance between the positioning rods 123 to adapt to the diameter of the flywheel weight reduction hole.

[0079] As another embodiment further provided by the present invention, the first capstan 1211 is composed of first sliding bars 1215 distributed in a linear array on the driving disk 121, and the plurality of first sliding bars 1215 move to make the diameter of the first capstan 1211 adjustable.

[0080] Specifically, the end of the first slide rod 1215 is provided with an arc groove for limiting the second pull rope 116, and the internal rotation of the driving disk 121 is provided with a first driving ring 1213 for driving multiple first slide rods 1215 to move synchronously, and the first driving ring 1213 is provided with a second planar thread, and the first slide rod 1215 is provided with a sliding groove adapted to the second planar thread.

[0081] Furthermore, before starting work, the diameter of the first capstan 1211 is adjusted according to the diameter of the flywheel shaft hole, driving the first drive ring 1213 to rotate, and the second planar thread on the first drive ring 1213 moves along the slide groove on the first slide rod 1215, pushing the first slide rod 1215 to move relative to the axis of the drive disk 121, thereby adjusting the diameter of the first capstan 1211.

[0082] As another embodiment further provided by the present invention, the second capstan 1212 is composed of second sliding bars 1216 distributed in a linear array on the driving disk 121, and the plurality of second sliding bars 1216 move to make the diameter of the second capstan 1212 adjustable.

[0083] Specifically, the end of the second slide bar 1216 is provided with an arc groove for limiting the third pull rope 117, the inner rotation of the driving disk 121 is provided with a second driving ring 1214 for driving the plurality of second slide bars 1216 to move synchronously, the second driving ring 1214 is provided with a third plane thread, the second slide bar 1216 is provided with a sliding groove adapted to the third plane thread, a square movable tube 124 is slidably provided on the movable plate 11, the movable tube 124 is rotatably provided with a shaft 125, and the shaft 125 is provided with a shaft for driving the first driving ring 1213 and the second driving ring 1214 to move synchronously. Ring 1214 rotates the bevel gear 126, and the first drive ring 1213 and the second drive ring 1214 are both provided with gear teeth adapted to the bevel gear 126. The drive disk 121 is provided with notches distributed in a circular array and adapted to the square movable tube 124. The movable cylinder 12 is specifically made of transparent material. The first slide bar 1215 and the second slide bar 1216 are both provided with scale lines to check the diameters of the first capstan 1211 and the second capstan 1212. A fourth pull rope 127 is provided between the first tenon block 22 and the movable cylinder 12, and the fourth pull rope 127 has a certain elasticity.

[0084] Furthermore, before starting work, the diameters of the first capstan 1211 and the second capstan 1212 are adjusted according to the diameters of the flywheel shaft hole and the weight-reducing hole. When adjusting the first capstan 1211, the shaft 125 is pushed, and the shaft 125 drives the movable tube 124 to move, so that the movable tube 124 is embedded in the notch on the drive disk 121. The movable tube 124 spans the drive disk 121 and the movable cylinder 12, and the bevel gear 126 is meshed with the gear teeth on the first drive ring 1213. The shaft 125 is rotated, and the shaft 125 passes through the bevel gear 121. 6 drives the first driving ring 1213 to rotate, and the second plane thread on the first driving ring 1213 moves along the sliding groove on the first sliding rod 1215, pushing the first sliding rod 1215 to move relative to the axis of the driving disk 121, thereby adjusting the diameter of the first capstan 1211, so that the movable cylinder 12 moves from the inside of the movable plate 11 to the outside of the movable plate 11 (that is, the moving path length of the second pull rope 116 pulling the outside of the first capstan 1211) to allow the driving disk 121 to rotate at a suitable angle (that is, the driving disk 121 drives the fixed plate 111 to rotate at a suitable angle). The positioning rod 123 moves, and the positioning rod 123 can be close to the flywheel shaft hole); when adjusting the second capstan 1212, the shaft 125 is pushed, and the shaft 125 drives the movable tube 124 to move, so that the movable tube 124 is embedded in the notch on the drive disk 121, and the movable tube 124 spans the drive disk 121 and the movable cylinder 12, and the bevel gear 126 is engaged with the gear teeth on the second drive ring 1214, and the shaft 125 is rotated, and the shaft 125 drives the second drive ring 1214 to rotate through the bevel gear 126, and the second drive ring 1214 is rotated. The third plane thread moves along the slide groove on the second slide rod 1216, pushing the second slide rod 1216 to move relative to the axis of the driving disk 121, and then adjusting the diameter of the second capstan 1212, so that the movable cylinder 12 moves from the inside of the movable plate 11 to the outside of the movable plate 11 (that is, the length of the moving path of the third pull rope 117 pulling the outside of the second capstan 1212) to allow the driving disk 121 to rotate to a suitable angle (that is, the driving disk 121 drives the positioning rod 123 to move, and the positioning rod 123 can be close to the flywheel weight reduction hole).

[0085] Then, the flywheel with a lightening hole is fixed on the turntable 211 by using the three-jaw chuck 212. The distance between the axis of the lightening hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder 12 and the axis of the drill cylinder 25. The chuck drives the drill cylinder 25 and the movable plate 11 to rotate, so that the movable cylinder 12 is in the first position, that is, the angle between the movable plate 11 and the horizontal plane is 30°. At this time, the locking block 112 extends from the movable plate 11, and one of the locking blocks 112 abuts against the bottom of the movable cylinder 12 (such as Figure 5 As shown), to prevent the movable cylinder 12 from moving into the movable plate 11, another locking block 112 is inserted into the groove on the holder 24, spanning the movable plate 11 and the holder 24, and the movable plate 11 can rotate with the holder 24, and then adjust the position of the second tenon block 23 relative to the first tenon block 22 and the height of the mounting base 21, so that the flywheel shaft hole is opposite to the movable cylinder 12, and the drill cylinder 25 is opposite to the weight reduction hole on the flywheel.

[0086] The first electric telescopic rod pushes the first tenon block 22 to move with the mounting seat 21 towards the direction close to the drill tube 25, and the first pull rope 113 between the first tenon block 22 and the movable cylinder 12 is gradually tightened until the trigger rod 111 on the movable plate 11 is against the flywheel, and the trigger rod 111 pulls the first pull rope 113, and the first pull rope 113 drives the locking block 112 to move towards the inside of the movable plate 11, and the locking block 112 fixing the movable cylinder 12 moves first, and the movable cylinder 12 is unlocked first, and the third pull rope 117 drives the movable cylinder 12 to move towards the inside of the movable plate 11, and the spring between the movable cylinder 12 and the movable plate 11 is compressed, and the distance between the movable cylinder 12 and the first magnet 114 is reduced, and the second pull rope 116 is relaxed, and the torsion spring drives the driving disk 121 to rotate, so that the positioning rod 123 moves closer to the axis of the movable cylinder 12, and the positioning rod 123 is separated from the flywheel, and then another locking block 112 is also separated from the seat 24, and the movable plate 11 is unlocked. Under the action of the pulling force of the third pull rope 117 and its own gravity, the movable plate 11 rotates and abuts against the fixed plate 26, and is perpendicular to the horizontal plane. The third pull rope 117 is relaxed, and the movable cylinder 12 moves to the outside of the movable plate 11 under the push of the spring. At this time, the second magnet 115 is attracted to the fourth magnet on the frame 2, and the distance between the second magnet 115 and the movable cylinder 12 increases. The second magnet 115 drives the second capstan 1212 to rotate through the third pull rope 117, and the second capstan 1212 drives the driving disk 121 to rotate relative to the movable cylinder 12. The driving disk 121 drives the positioning rods 123 on the movable cylinder 12 to move, and the distance between the positioning rods 123 is changed to adapt to the diameter of the flywheel weight reduction hole. A plurality of positioning rods 123 are inserted into the flywheel weight reduction hole to position the flywheel. The flywheel axis, the drill tube 25 axis and the movable cylinder 12 axis form an equilateral triangle, which can position the flywheel and the weight reduction hole during the drilling process to ensure the accuracy of the drilling point.

[0087] After the drilling is completed, the first tenon block 22 moves the flywheel away from the drill tube 25, the trigger rod 111 is separated from the flywheel, the first pull rope 113 is relaxed, and one of the lock blocks 112 is inserted into the groove on the holder 24 under the push of the spring. The holder 24 rotates the movable plate 11 by 60 degrees, and the movable cylinder 12 moves to the first position. The first magnet 114 is attracted to the third magnet, and the first capstan 1211 is driven to move by the second pull rope 116. The rotation angle of the driving disk 121 is adjusted so that the spacing of the positioning rod 123 is adapted to the flywheel shaft hole, and the other lock block 112 is against the bottom of the movable cylinder 12 (such as Figure 5As shown), the movable cylinder 12 is prevented from moving toward the inside of the movable plate 11, the mounting seat 21 continues to move, the movable rod 213 approaches the baffle 214 and gradually contacts the baffle 214, the baffle 214 pushes the movable rod 213 to move relative to the mounting seat 21, and the guide block 215 on the movable rod 213 moves along the inclined portion 218 of the guide groove 216, thereby pushing the turntable 211 to rotate 60° with the flywheel relative to the mounting seat 21, so that the next drilling point is opposite to the drill cylinder 25.

[0088] Repeat the operation and perform positioning work before each drilling, process multiple weight reduction holes, and each time the processing is performed, the movable plate 11 will cooperate with the positioning rod 123 to position the flywheel, so as to avoid the accumulation of errors during multiple operations and improve the drilling accuracy.

[0089] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A turning method for a diesel engine flywheel, characterized in that: The invention comprises a frame (2), on which is arranged: A mounting seat (21) on which a rotating disk (211) for fixing the flywheel is movably disposed; Drill barrel (25); A positioning assembly (1) comprising a movable plate (11) movably mounted on the drill tube (25), a movable cylinder (12) movably arranged on the movable plate (11), and positioning rods (123) distributed in a circumferential array arranged on the movable cylinder (12), wherein the movable cylinder (12) comprises a first position and a second position: In the first position, the movable plate (11) is at an angle of 30° to the horizontal plane, and the movable cylinder (12) is directly opposite to the flywheel shaft hole; In the second position, the movable plate (11) is perpendicular to the horizontal plane, and the movable cylinder (12) is directly opposite to the weight-reducing hole; The following steps are also included: S1. Fix a flywheel with a lightening hole on a rotating disk (211), wherein the distance between the axis of the lightening hole and the axis of the flywheel is equal to the distance between the axis of the movable cylinder (12) and the axis of the drill cylinder (25); S2, the drill tube (25) drives the movable plate (11) and the movable tube (12) to rotate, the movable tube (12) is in a first position, and the drill tube (25) is facing the weight-reducing hole; S3, the mounting seat (21) moves and drives the rotating disk (211) to rotate 60 degrees, the positioning rod (123) is inserted into the shaft hole, the movable cylinder (12) contracts, and moves from the first position to the second position; S4, the movable cylinder (12) moves to insert the positioning rod (123) into the weight-reducing hole, fix the flywheel, and the drill cylinder (25) drills the next weight-reducing hole on the flywheel; S5. Repeat the operation and perform positioning work before each drilling to process multiple weight-reducing holes; A pair of locking blocks (112) are movably provided on the movable plate (11) and are used to lock the drill tube (25) and the movable tube (12) respectively. The rotary disk (211) moves to a predetermined position to unlock the drill tube (25) and the movable tube (12). A trigger rod (111) is provided on the movable plate (11), a first pull rope (113) is provided between the trigger rod (111) and the two locking blocks (112), and the rotating disk (211) pushes the trigger rod (111) to move the locking blocks (112); The mounting seat (21) is provided with a movable rod (213), and the movable rod (213) is provided with a guide block (215) for pushing the rotating disk (211) to rotate, and the movable rod (213) moves relative to the mounting seat (21) to rotate the rotating disk (211) by a predetermined angle; Six guide grooves (216) adapted to the guide blocks (215) are provided on the outer wall of the rotating disk (211), the plurality of guide grooves (216) being connected end to end, the guide grooves (216) comprising an inclined portion (218) and a straight portion (217), and a baffle (214) for pushing the movable rod (213) is provided on the frame (2).

2. A diesel engine flywheel turning method according to claim 1, characterized in that: The movable cylinder (12) is internally rotatably provided with a driving disk (121) for driving the plurality of positioning rods (123) to move, and the driving disk (121) is provided with a first capstan (1211) and a second capstan (1212) coaxially distributed and used for driving the driving disk (121) to rotate.

3. A turning method for a diesel engine flywheel according to claim 2, characterized in that: When the movable cylinder (12) is in the first position, the movable cylinder (12) moves relative to the movable plate (11) so that the first capstan (1211) drives the driving disk (121) to rotate.

4. A diesel engine flywheel turning method according to claim 2, characterized in that: When the movable cylinder (12) is in the second position, the movable cylinder (12) moves relative to the movable plate (11) so that the second capstan (1212) drives the driving disk (121) to rotate.

5. A diesel engine flywheel turning method according to claim 3, characterized in that: The first capstan (1211) is composed of first sliding bars (1215) distributed in a linear array on the driving disk (121), and a plurality of the first sliding bars (1215) move to make the diameter of the first capstan (1211) adjustable.

6. A diesel engine flywheel turning method according to claim 4, characterized in that: The second capstan (1212) is composed of second sliding bars (1216) distributed in a linear array on the driving disk (121), and a plurality of second sliding bars (1216) move to make the diameter of the second capstan (1212) adjustable.

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