A high-precision milling process for engine cylinder

Abstract

The invention discloses a high-precision milling process for an engine cylinder body, comprising the following steps: step one: placing the engine cylinder body on a clamping seat for fixing; step two: controlling the milling platform to move on the machine body, and then controlling the clamping seat to move on the milling platform, to move the engine cylinder body to a target position for milling processing; step three: determining the milling target point of the engine cylinder body, starting the milling motor to drive the milling spindle to rotate; the milling spindle drives the coupling block to rotate through the connecting shaft, the telescopic shaft and the transmission shaft in turn, and drives the milling tool connected to the coupling block to rotate; step four: controlling the milling cantilever to move downward along the machine body to perform milling processing on the engine cylinder body, which reduces the working steps of milling on the one hand, and reduces the steps of multiple positioning of one milling; on the other hand, in the milling process, the problem of poor milling precision caused by multiple positioning in the processing of larger slots or tapered holes can be solved by positioning once.

Description

Technical Field

[0001] The invention relates to the technical field of milling, and in particular to a high-precision milling process for an engine cylinder block. Background Art

[0002] A milling machine is a machine tool that uses a milling cutter to process parts. Its main motion is the rotation of the milling cutter, and the movement of the workpiece and the milling cutter is the feed motion. It can be used to process planes and grooves, as well as various curved surfaces and gears. It is widely used in mechanical manufacturing and repair departments.

[0003] In the process of milling the surface of the engine block, since the diameter of the engine block surface is large, and there are also milling such as slots, tapered holes and chamfers; therefore, in the milling process, a single milling tool is difficult to meet the use requirements of various situations. Existing milling machine tools often need to replace multiple tools in the process of meeting various processing requirements, and multiple replacements of milling tools require multiple reference positioning, which easily leads to errors in the positioning process. When the errors are too many, it is easy to cause unqualified processing. Therefore, in the process of milling the engine block, it is necessary not only to ensure its stability, but also to ensure the processing accuracy of the milling equipment when performing various processing on the engine block. Summary of the invention

[0004] The object of the present invention is to provide a high-precision milling process for an engine cylinder block to solve the above-mentioned problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A high-precision milling process for an engine cylinder block comprises the following steps:

[0007] Step 1: Place the engine block on the clamping seat for fixing;

[0008] Step 2: Control the milling platform to move on the engine body, and then control the clamping seat to move on the milling platform to move the engine cylinder body to the target position for milling processing;

[0009] Step 3: Determine the milling target point of the engine cylinder block, start the milling motor to drive the milling spindle to rotate; the milling spindle drives the coupling block to rotate through the connecting shaft, the telescopic shaft and the transmission shaft in turn, and then drives the milling tool connected to the coupling block to rotate;

[0010] Step 4: Control the milling cantilever to move downward along the fuselage to perform milling on the engine block.

[0011] As a further solution of the present invention, the axis shifting motor drives the axis shifting screw to rotate, controls the axis seat to move along the axis shifting slide rod, and makes the coupling block under the transmission shaft drive the milling tool to move, so as to mill the engine cylinder body.

[0012] As a further solution of the present invention: the rotating motor drives the rotating gear to rotate, then drives the rotating plate to rotate, and then drives the angle plate to rotate, controls the coupling block to be adjusted to a tilted state, and mills the engine cylinder block.

[0013] As a further solution of the present invention: during the milling process of the engine, when the coupling block drives the milling cutter to move, the connecting shaft and the telescopic shaft slide relative to each other.

[0014] As a further solution of the present invention: the coupling block is adjusted to an inclined state by rotating the motor, and the angle between the inclination angle and the center line of the milling spindle is 0-30°.

[0015] As a further solution of the present invention: the milling motor drives the active bevel gear to rotate, and then drives the driven bevel gear to rotate through the active bevel gear, so that the milling power cylinder rotates, and the engine cylinder is milled by the milling tool.

[0016] As a further solution of the present invention: the milling motor drives the power wheel to rotate, which drives the transmission wheel to rotate through the transmission chain, and drives the milling spindle to rotate.

[0017] As a further solution of the present invention: the milling spindle drives the connecting shaft lug to rotate through the spindle lug at the end, so that the connecting shaft rotates.

[0018] As a further solution of the present invention: the connecting shaft drives the telescopic pin to rotate, thereby causing the telescopic shaft to rotate.

[0019] As a further solution of the present invention: the telescopic shaft drives the transmission shaft lug to rotate through the telescopic shaft lug, so that the transmission shaft rotates.

[0020] Beneficial effects of the present invention:

[0021] In the present invention, the axis shifting motor drives the axis shifting screw to rotate, controls the axis seat to move along the axis shifting slide rod, and then drives the coupling block under the transmission shaft to move the milling tool, thereby milling the engine cylinder; the rotating motor drives the rotating gear to rotate, and then drives the rotating plate to rotate, thereby controlling the coupling block to be adjusted to a tilted state, and milling the engine cylinder; the milling angle motor drives the active bevel gear to rotate, and then drives the driven bevel gear to rotate through the active bevel gear, so that the milling power cylinder rotates, and then the engine cylinder is milled by the milling tool. Milling; It can meet the milling work of different apertures, slots and chamfers. When the milling motor drives the active bevel gear to rotate, the driven bevel gear can further drive the milling power cylinder to rotate, so as to realize the chamfering milling of the edges of larger apertures and larger arc slots; Compared with the existing milling process for processing large apertures, the overall process reduces the steps of replacing large-diameter milling tools and saves processing time; It can realize the processing and chamfering of slots at the same time, and can realize the milling of tapered holes, which solves the problem of moving the engine cylinder for secondary positioning during the milling process;

[0022] Drilling, milling and chamfering of various slots are performed by moving the milling tool and changing the position of the milling tool, rather than moving the engine cylinder to achieve milling of different slots. On the one hand, the milling work steps are reduced and the steps of multiple positioning for milling are reduced; on the other hand, during the milling process, the problem of poor milling accuracy caused by multiple positioning in the processing of larger slots or tapered holes can be solved through one positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a cross-sectional schematic diagram of the milling power cylinder and the milling cantilever structure in the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure between the central axis seat and the axis-shifting screw rod of the present invention;

[0026] Figure 3 It is a cross-sectional schematic diagram of the connection structure between the angle plate and the milling power cylinder in the present invention;

[0027] Figure 4 It is a schematic diagram of the connection structure between the telescopic shaft and the connecting shaft in the present invention;

[0028] Figure 5 It is a schematic diagram of the overall structure of the milling equipment in the present invention;

[0029] Figure 6 It is a schematic diagram of the connection structure of the fixed components in the present invention.

[0030] In the figure: 1, machine body; 2, machine body; 21, milling cantilever; 22, milling angle motor; 221, driving bevel gear; 23, milling motor; 231, power wheel; 24, milling spindle; 241, transmission wheel; 242, spindle shaft ear; 243, transmission chain; 25, milling power cylinder; 251, driven bevel gear; 252, shaft frame; 253, angle plate; 254, rotating plate; 2541, gear; 2542, axis shifting motor; 255, axis shifting screw rod; 256, axis shifting slide rod; 2 57. Rotating motor; 2571. Rotating gear; 26. Connecting shaft; 261. Connecting shaft lug; 27. Telescopic shaft; 271. Telescopic shaft lug; 272. Telescopic pin; 273. Universal ball; 28. Transmission shaft; 281. Transmission shaft lug; 29. ​​Shaft seat; 290. Coupling block; 3. Milling platform; 4. Fixed assembly; 41. Clamping seat; 42. Abutment block; 43. Fixed slide rail; 44. Fixed screw; 441. Rotating arm; 45. Push plate; 451. Clamping block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figure 5 As shown, the present invention is an engine cylinder milling device, comprising a machine body 1, wherein a machine body 2 is fixedly arranged at one end above the machine body 1, and a milling structure for milling the engine cylinder is slidably arranged on the side of the machine body 2; at the same time, a milling platform 3 is slidably arranged on the machine body 1 and below the milling structure, and a fixing component 4 for fixing the engine cylinder is arranged on the milling platform 3. When performing milling work, the milling platform 3 can be moved out first, and then the engine cylinder is fixed on the fixing component 4, and then milling can be performed;

[0034] It should be noted that the movement of the milling platform 3 on the body 1, the movement of the fixing assembly 4 on the milling platform 3, and the movement of the milling cantilever 21 on one side of the body 2 all adopt the existing technical structure, which will not be described in detail here;

[0035] Specific as Figure 1 and Figure 4As shown, the structure for milling the engine cylinder block includes a milling cantilever 21 slidably arranged on one side of the fuselage 2, a milling power cylinder 25 is rotatably arranged inside the milling cantilever 21, and a milling spindle 24 is rotatably arranged above the milling power cylinder 25, and at the same time, a shaft frame 252 for supporting the milling spindle 24 is arranged inside the milling power cylinder 25, that is, the lower end of the milling spindle 24 is rotatably connected to the top of the shaft frame 252, and the end of the milling spindle 24 passes through the top of the shaft frame 252 and is connected to a connecting shaft 26; wherein, the end of the milling spindle 24 passing through one end of the shaft frame 252 is fixedly and integrally arranged with a spindle shaft ear 242, and at the same time, a connecting shaft shaft ear 261 is arranged at the upper end of the connecting shaft 26, and the connecting shaft shaft ear 261 is connected to the spindle shaft ear 242 through a cross shaft, and the ends of the cross shaft are rotatably connected to the connecting shaft shaft ear 261 and the spindle shaft ear 242 respectively;

[0036] At the same time, refer to Figure 2 and Figure 3 As shown, the milling power cylinder 25 is in an inverted "T" shape as a whole, and the lower part is open, and two angle disks 253 are symmetrically rotatably arranged at the two ends of the lower part of the milling power cylinder 25, and a shifting screw rod 255 and a shifting slide rod 256 are arranged between the two angle disks 253, wherein the two ends of the shifting screw rod 255 are rotatably connected with the two angle disks 253 respectively; and, an axle seat 29 is slidably arranged on the shifting slide rod 256, and the axle seat 29 is threadedly connected with the shifting screw rod 255, and an axle shift motor 2542 is arranged on one side of an angle disk 253, and the output end of the axle shift motor 2542 is connected with one end of the axle shift screw rod 255, when the axle shift motor 2542 drives the shifting screw rod 255 to rotate, it can further drive the axle seat 29 to move between the two angle disks 253;

[0037] At the same time, a transmission shaft 28 for connecting a milling tool is provided in the middle of the shaft seat 29, and a telescopic shaft 27 is connected to one end of the transmission shaft 28 outside the shaft seat 29, wherein a transmission shaft lug 281 is fixedly provided at the end of the transmission shaft 28, and a telescopic shaft lug 271 is provided below the telescopic shaft 27, and the telescopic shaft lug 271 is connected to the transmission shaft lug 281 through a cross shaft, and similarly, the ends of the cross shaft are respectively rotatably connected to the telescopic shaft lug 271 and the transmission shaft lug 281;

[0038] In addition, a telescopic pin 272 with a "cross" shaped cross section is provided at the upper end of the telescopic shaft 27, and the telescopic shaft 27 is slidably connected to the connecting shaft 26 through the telescopic pin 272, that is, the connection between the telescopic shaft 27 and the connecting shaft 26 can be telescopically adjusted, and when the connecting shaft 26 is rotating, the telescopic shaft 27 can be further driven to rotate. During the working process, the transmission distance between the milling spindle 24 and the transmission shaft 28 can be increased, and when the shaft seat 29 is angularly deflected, the connection method of the connecting shaft 26 and the milling spindle 24 can ensure the stable rotation of the milling spindle 24. At the same time, the connection method of the telescopic shaft 27 and the transmission shaft 28 can enable the milling spindle 24 to stably realize the transmission of the transmission shaft 28 through the connecting shaft 26 and the telescopic shaft 27 during the rotation process, thereby ensuring the stable progress of the milling work;

[0039] When the shaft seat 29 moves between the two angle plates 253, the center line of the transmission shaft 28 is offset from the center line of the milling spindle 24. At this time, the connecting shaft 26 and the telescopic shaft 27 are in an inclined state, and the rotation transmission effect can still be achieved;

[0040] Furthermore, in order to ensure that the connecting shaft 26 generates a large force when driving the telescopic shaft 27 to rotate, which causes a large sliding friction of the telescopic pin 272, universal balls 273 are arranged on all sides of the telescopic pin 272, which can realize the transmission of the telescopic shaft 27 during the rotation of the connecting shaft 26, and realize the telescopic connection between the connecting shaft 26 and the telescopic shaft 27, so as to meet the requirement that the connecting shaft 26 and the telescopic shaft 27 are telescopically connected during the adjustment process of the shaft seat 29;

[0041] Secondly, the power connection method of the milling spindle 24 is as follows: a transmission wheel 241 is set at one end of the milling spindle 24 located outside the milling cantilever 21, and then a milling motor 23 is set outside the milling spindle 24, and a power wheel 231 is set at the output end of the milling motor 23, and the power wheel 231 and the transmission wheel 241 are connected through a transmission chain 243, and the power wheel 231 is driven to rotate by the milling motor 23, and the transmission wheel 241 is further driven to rotate by the transmission chain 243. At this time, the milling spindle 24 can rotate with the transmission wheel 241; and then the milling tool installed in the coupling block 290 can be driven through the telescopic shaft 27, the connecting shaft 26 and the transmission shaft 28, and then the engine cylinder block can be milled;

[0042] During the milling process, the milling cantilever 21 can be moved up and down to perform milling processing on the hole position of the engine cylinder body; at the same time, during the milling process, the axis shifting motor 2542 can also be used to drive the axis shifting screw 255 to rotate, and further drive the axis shifting screw 255 and the shaft seat 29 on the axis shifting slide 256 to move, so as to drive the connecting shaft block 290 and the milling tool connected below the shaft seat 29 to move. When the engine cylinder body is milled, the axis shifting motor 2542 can be used to control the shaft seat 29 to move, so as to realize the milling processing of the slot hole on the surface of the engine cylinder body;

[0043] At the same time, when milling the engine cylinder, some of the slots on the surface of the cylinder are tapered holes, and some of the slots on the surface of the cylinder need to be chamfered. Based on this, in this solution, a rotating plate 254 is fixedly provided on one side of one of the angle disks 253, and gear teeth 2541 are provided on one side of the rotating plate 254. The distribution angle of the gear teeth 2541 on the outer side of the rotating plate 254 is 180°. At the same time, a rotating motor 257 is provided above one end of the horizontal structure below the milling power cylinder 25, and a rotating gear 2571 is provided on the output end of the rotating motor 257, and the rotating gear 2571 is meshed and connected with the gear teeth 2541 on the side of the rotating plate 254.

[0044] The rotating gear 2571 is driven to rotate by the rotating motor 257, which can further drive the rotating plate 254 to rotate. The rotating plate 254 is fixedly connected to the angle plate 253. Therefore, when the rotating plate 254 rotates, the angle plate 253 can be driven to rotate. The fixed connection between the two angle plates 253 is through the axis shifting slide bar 256. Therefore, the two angle plates 253 can realize synchronous rotation. When the rotating plate 254 rotates, the two angle plates 253 can drive the shaft seat 29 to rotate while rotating with the rotating plate 254, thereby rotating the coupling block 290 and the milling tool under the shaft seat 29. At this time, the angle of the milling tool is no longer perpendicular to the horizontal plane, so that the milling tool forms a tilted state. At this time, when the shaft seat 29 drives the coupling block 290 and the milling tool to move, the edge of the slot or structure can be chamfered.

[0045] When the shaft seat 29 rotates, when the rotation angle is not greater than 30° in the vertical direction, the connecting shaft 26 and the telescopic shaft 27 also achieve the transmission effect, meeting the chamfering working requirements;

[0046] After the milling of holes, grooves and structures on the surface of the engine block is completed, the milling tool can be tilted by adjusting the rotary motor 257, and then the movement of the branch line can be realized by cooperating with the movement of the shaft seat 29. At this time, the edge of the branch line of the long groove or structure can be chamfered; when facing the chamfering of the edge of a larger circular hole or arc-shaped groove, the milling tool needs to be kept in an inclined state and rotated in an arc shape before the chamfering of the larger circular hole or arc-shaped groove can be performed; based on this A driven bevel gear 251 is arranged on the outside of the milling power cylinder 25, and a milling angle motor 22 is arranged on the inside of the milling cantilever 21, and then an active bevel gear 221 is arranged on the output end of the milling angle motor 22, and the active bevel gear 221 is meshed and connected with the driven bevel gear 251. At this time, the active bevel gear 221 is driven to rotate by the milling angle motor 22, and the milling power cylinder 25 can be further driven to rotate by the driven bevel gear 251, so that the chamfering of the edges of larger apertures and larger arc grooves can be achieved.

[0047] Embodiment 2

[0048] Based on the above, during the milling process, after the drilling and milling of the aperture is completed by the milling tool, if the aperture completed by the drilling and milling needs to be enlarged, the axis shifting motor 2542 can be used to drive the axis shifting screw 255 to rotate, and then the shaft seat 29 can be moved, so that the milling tool can be moved in the horizontal direction. After the movement deviation reaches the radius length of the target large hole, the active bevel gear 221 can be driven to rotate by the milling angle motor 22, and then the milling power cylinder 25 can be driven to rotate. At this time, the milling tool can rotate around the center line of the milling spindle 24, and then rotate at the radius deviated by the shaft seat 29, so as to achieve the purpose of milling the large aperture;

[0049] Furthermore, after the drilling and milling of the aperture on the engine block is completed, the rotating gear 2571 is driven to rotate by the rotating motor 257, so that the two angle plates 253 can drive the shaft seat 29 to rotate as a whole, so that the milling tool is tilted. At this time, the milling tool is kept rotating, and the milling power cylinder 25 is driven to rotate by the milling angle motor 22, so that the milling tool in the tilted and working state can be rotated as a whole, and the purpose of chamfering the edge of the large aperture on the engine block can be achieved.

[0050] Furthermore, when processing the slots on the engine cylinder block, after the initial hole drilling and milling, the axis shifting motor 2542 can be used to drive the axis shifting screw 255 to rotate, thereby moving the shaft seat 29, so that the milling tool moves along a straight line to form a "track-shaped" slot;

[0051] Similarly, when the edge of the slot hole needs to be chamfered, the shaft seat 29 can be driven to rotate by controlling the angle plate 253 to rotate, so that the milling tool is kept in an inclined state, thereby achieving the purpose of chamfering the edge of the slot hole;

[0052] In the above-mentioned milling example, drilling, milling and chamfering of various slots are performed by moving the milling tool and changing the position of the milling tool, rather than moving the engine cylinder to achieve the milling of different slots. On the one hand, the milling work steps are reduced, and the steps of multiple positioning for milling are reduced; on the other hand, during the milling process, the problem of poor milling accuracy caused by multiple positioning in the processing of larger slots or tapered holes can be solved by positioning once.

[0053] Embodiment 3

[0054] Based on the above embodiment, regarding the fixing component 4 for fixing the engine cylinder body, specifically as follows Figure 5 and Figure 6 As shown; the fixing assembly 4 includes a clamping seat 41 arranged on the milling platform 3, and fixed slide rails 43 are symmetrically arranged on the clamping seat 41. Abutment blocks 42 are fixedly arranged at one end of the two fixed slide rails 43, and a fixed screw 44 is rotatably arranged in the middle of the abutment block 42 and located between the two fixed slide rails 43. A push plate 45 is slidably arranged on the two fixed slide rails 43, and a clamping block 451 is arranged on one side of the push plate 45 close to the abutment block 42. The middle part of the push plate 45 is threadedly connected with the fixed screw 44, and a rotating arm 441 is fixedly arranged at one end of the fixed screw 44;

[0055] Before the milling work begins, the engine block is placed on two fixed slide rails 43 and between the abutment block 42 and the clamping block 451. Then, by rotating the rotating arm 441 and then rotating the fixing screw 44, the push plate 45 can be moved to further fix the engine block. Then, the milling process can be carried out to ensure the stability of the engine block processing process.

[0056] Embodiment 4

[0057] A high-precision milling process for an engine cylinder block comprises the following steps:

[0058] Step 1: Place the engine block on the two fixed slide rails 43 and between the abutment block 42 and the clamping block 451, and then rotate the rotating arm 441 and then rotate the fixing screw 44 to move the push plate 45 to further fix the engine block;

[0059] Step 2: Control the milling platform 3 to move on the machine body 1, and then control the clamping seat 41 to move on the milling platform 3 to move the engine cylinder body to the target position for milling processing;

[0060] Step 3: Determine the milling target point of the engine cylinder body, start the milling motor 23 to drive the milling spindle 24 to rotate; the milling spindle 24 further drives the coupling block 290 to rotate through the connecting shaft 26, the telescopic shaft 27 and the transmission shaft 28, and then drives the milling tool connected to the coupling block 290 to rotate;

[0061] Step 4: Control the milling cantilever 21 to move downward along the fuselage 2 to perform milling processing on the engine cylinder block.

[0062] Embodiment 5

[0063] Based on the above embodiment, the specific working steps of the milling process include:

[0064] A: The axis-shifting motor 2542 drives the axis-shifting screw rod 255 to rotate, controls the axis seat 29 to move along the axis-shifting slide rod 256, and then drives the coupling block 290 under the transmission shaft 28 to move the milling tool, thereby milling the engine cylinder block;

[0065] B: The rotating motor 257 drives the rotating gear 2571 to rotate, and then drives the rotating plate 254 to rotate, thereby controlling the coupling block 290 to be adjusted to a tilted state, and milling the engine cylinder block;

[0066] C: The milling motor 22 drives the active bevel gear 221 to rotate, and then the active bevel gear 221 drives the driven bevel gear 251 to rotate, so that the milling power cylinder 25 rotates, and then the engine cylinder body is milled by the milling tool;

[0067] It should be noted that, in the present embodiment, the three milling modes can be independently operated during the milling process, and can meet the milling tasks of different hole diameters, slots, tapered holes and chamfers.

[0068] Embodiment 6

[0069] Based on the above-mentioned fourth and fifth embodiments, this embodiment provides more specific work contents for the work steps in the milling process;

[0070] include:

[0071] The milling motor 23 drives the power wheel 231 to rotate, and further drives the transmission wheel 241 to rotate through the transmission chain 243. At this time, the milling spindle 24 can rotate with the transmission wheel 241; then the milling tool installed in the coupling block 290 can be driven through the telescopic shaft 27, the connecting shaft 26 and the transmission shaft 28 to perform milling processing on the engine cylinder block;

[0072] During the milling process, the milling steps in the fifth embodiment can be performed, that is, the coupling block 290 is moved and tilted. At this time, the connecting shaft 26 and the telescopic shaft 27 are in a tilted state, and the transmission effect of rotation can still be achieved. When the shaft seat 29 rotates, when the rotation angle is not greater than 30° in the vertical direction, the connecting shaft 26 and the telescopic shaft 27 also achieve the transmission effect, meeting the chamfering work requirements;

[0073] When the milling motor 22 drives the active bevel gear 221 to rotate, the driven bevel gear 251 can further drive the milling power cylinder 25 to rotate, so that the edge of a larger aperture and a larger arc groove can be chamfered;

[0074] Compared with the existing milling process for processing large apertures, the overall process reduces the steps of replacing large-diameter milling cutters and saves processing time;

[0075] The processing and chamfering of the slots can be realized at the same time, and the milling of tapered holes can be realized, which solves the problem of moving the engine cylinder for secondary positioning during the milling process and reduces the error. At the same time, during the milling process, the milling tool is moved to avoid the situation where the engine cylinder moves and hits the tool, which may cause damage to the milling tool.

[0076] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A high-precision milling process for an engine cylinder block, characterized in that: The following steps are involved: Step 1: placing the engine block on a clamping seat (41) of the engine block milling equipment for fixing; Step 2: Control the milling platform (3) to move on the engine body (1), and then control the clamping seat (41) to move on the milling platform (3), so as to move the engine cylinder body to a target position for milling processing; Step 3: Determine the milling target point of the engine cylinder body, start the milling motor (23) to drive the milling spindle (24) to rotate; the milling spindle (24) drives the coupling block (290) to rotate through the connecting shaft (26), the telescopic shaft (27) and the transmission shaft (28), and then drives the milling tool connected to the coupling block (290) to rotate; Step 4: Control the milling cantilever (21) to move downward along the fuselage (2) to perform milling processing on the engine cylinder block; The engine cylinder block milling device comprises a machine body (1), a machine body (2) is fixedly arranged at one end above the machine body (1), a milling structure for milling the engine cylinder block is slidably arranged on the side of the machine body (2), a milling platform (3) is slidably arranged on the machine body (1) and below the milling structure, and a fixing component (4) for fixing the engine cylinder block is arranged on the milling platform (3); The structure for milling an engine cylinder comprises a milling cantilever (21) slidably arranged on one side of a fuselage (2), a milling power cylinder (25) rotatably arranged inside the milling cantilever (21), a milling spindle (24) rotatably arranged above the milling power cylinder (25), a shaft frame (252) for supporting the milling spindle (24) arranged inside the milling power cylinder (25), the lower end of the milling spindle (24) being rotatably connected to the top of the shaft frame (252), and the milling spindle The end of the milling spindle (24) passes through the top of the shaft frame (252) and is connected to a connecting shaft (26); the end of the milling spindle (24) passing through one end of the shaft frame (252) is fixedly and integrally provided with a spindle shaft ear (242); the upper end of the connecting shaft (26) is provided with a connecting shaft shaft ear (261); the connecting shaft shaft ear (261) is connected to the spindle shaft ear (242) through a cross shaft, and the ends of the cross shaft are respectively rotatably connected to the connecting shaft shaft ear (261) and the spindle shaft ear (242); The milling power cylinder (25) is in an inverted "T" shape as a whole, and is open at the bottom. Two angle disks (253) are symmetrically rotatably arranged at the two ends of the bottom of the milling power cylinder (255). An axis shifting screw rod (255) and an axis shifting slide rod (256) are arranged between the two angle disks (253). The two ends of the axis shifting screw rod (255) are respectively rotatably connected to the two angle disks (253). An axis seat (29) is slidably arranged on the axis shifting slide rod (256). The axis seat (29) is threadedly connected to the axis shifting screw rod (255). An axis shifting motor (2542) is arranged on one side of one angle disk (253). The output end of the axis shifting motor (2542) is connected to one end of the axis shifting screw rod (255). A transmission shaft (28) for connecting a milling cutter is arranged in the middle of the shaft seat (29); one end of the transmission shaft (28) located outside the shaft seat (29) is connected to a telescopic shaft (27); a transmission shaft lug (281) is fixedly arranged at the end of the transmission shaft (28); a telescopic shaft lug (271) is arranged below the telescopic shaft (27); the telescopic shaft lug (271) is connected to the transmission shaft lug (281) via a cross shaft; and the ends of the cross shaft are rotatably connected to the telescopic shaft lug (271) and the transmission shaft lug (281) respectively. A telescopic pin (272) having a cross-section in the shape of a cross is provided at the upper end of the telescopic shaft (27), and the telescopic shaft (27) is slidably connected to the connecting shaft (26) via the telescopic pin (272); A transmission wheel (241) is arranged at one end of the milling spindle (24) located outside the milling cantilever (21); a milling motor (23) is arranged outside the milling spindle (24); a power wheel (231) is arranged at the output end of the milling motor (23); and the power wheel (231) and the transmission wheel (241) are connected via a transmission chain (243); A rotating plate (254) is fixedly arranged on one side of an angle disc (253), and gear teeth (2541) are arranged on one side of the rotating plate (254), and the distribution angle of the gear teeth (2541) on the outer side of the rotating plate (254) is 180 degrees. A rotating motor (257) is arranged above one end of the transverse structure below the milling power cylinder (25), and a rotating gear (2571) is arranged on the output end of the rotating motor (257), and the rotating gear (2571) is meshedly connected with the gear teeth (2541) on the side of the rotating plate (254); A driven bevel gear (251) is arranged outside the milling power cylinder (25), a milling angle motor (22) is arranged inside the milling cantilever (21), and a driving bevel gear (221) is arranged on the output end of the milling angle motor (22), and the driving bevel gear (221) is meshedly connected with the driven bevel gear (251).

2. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: The axis shifting motor (2542) drives the axis shifting screw rod (255) to rotate, controls the axis seat (29) to move along the axis shifting slide rod (256), and causes the coupling block (290) below the transmission shaft (28) to drive the milling tool to move, thereby milling the engine cylinder body.

3. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: The rotating motor (257) drives the rotating gear (2571) to rotate, which in turn drives the rotating plate (254) to rotate, and then drives the angle plate (253) to rotate, thereby controlling the coupling block (290) to be adjusted to a tilted state, and milling the engine cylinder block.

4. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: During the milling process of the engine, when the coupling block (290) drives the milling cutter to move, the connecting shaft (26) and the telescopic shaft (27) slide relative to each other.

5. The high-precision milling process for an engine cylinder block according to claim 3, characterized in that: The coupling block (290) is adjusted to an inclined state by rotating the motor (257), and the angle between the inclination angle and the center line of the milling spindle (24) is 0-30 degrees.

6. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: The milling motor (22) drives the active bevel gear (221) to rotate, and the active bevel gear (221) drives the driven bevel gear (251) to rotate, so that the milling power cylinder (25) rotates, and the engine cylinder body is milled by the milling tool.

7. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: The milling motor (23) drives the power wheel (231) to rotate, drives the transmission wheel (241) to rotate through the transmission chain (243), and drives the milling spindle (24) to rotate.

8. The high-precision milling process for an engine cylinder block according to claim 1, characterized in that: The milling spindle (24) drives the connecting shaft lug (261) to rotate via the spindle lug (242) at the end, thereby causing the connecting shaft (26) to rotate.

9. The high-precision milling process for an engine cylinder block according to claim 8, characterized in that: The connecting shaft (26) drives the telescopic pin (272) to rotate, thereby causing the telescopic shaft (27) to rotate.

10. The high-precision milling process for an engine cylinder block according to claim 9, characterized in that: The telescopic shaft (27) drives the transmission shaft lug (281) to rotate via the telescopic shaft lug (271), thereby causing the transmission shaft (28) to rotate.

Images