CN213496636U - Improved high-precision special machine for machining camshaft holes of cylinder cover - Google Patents

Abstract

The improved high-precision special machine for machining the camshaft hole of the cylinder cover comprises a rack, wherein a boring cutter conveying and operating device, a cylinder cover positioning and conveying and pressing device, a base lifting device and a cutter bar limiting and spraying lubricating device are arranged on the rack. This scheme improved generation high accuracy cylinder head camshaft hole processing special plane sets up the base below, and base locating pin, locking cylinder, slide locating pin and slide cushion set up on the base, and the base then sets up on the lift seat on it, and shower head and copper sheathing seat set up on the base, make the cylinder head use the bottom surface down as the locating surface, have eliminated the machining error between cylinder head top, the bottom surface, and position degree, precision are higher, and the product of processing out is more meticulous.

Description

Improved high-precision special machine for machining camshaft holes of cylinder cover

Technical Field

The utility model relates to a processing special plane in cylinder head camshaft hole especially relates to improved type high accuracy cylinder head camshaft hole processing special plane.

Background

The camshaft is a component in the piston engine and is used for controlling the opening and closing actions of the valve, a camshaft hole is formed in a cylinder cover of the engine and is matched with the camshaft, and therefore the coaxiality and the precision of machining of the camshaft hole are high. The existing cylinder head camshaft hole device has the following defects: the bearing seat is arranged on the base, the bearing is arranged in the bearing seat, the boring cutter penetrates through the bearing, the boring cutter is in rotary fit with the bearing when in work, lubricating liquid cannot be introduced into the bearing due to the adoption of a bearing structure, the lubricating liquid can only be sprayed outside the bearing, the lubricating effect is poor, after the boring cutter rotates for a long time, the boring cutter and the bearing are easy to generate heat and wear, the machining precision of the boring cutter is influenced after the boring cutter and the bearing are worn, and the replacement cost of parts is improved by replacing the boring cutter and the bearing regularly; secondly, the cylinder cover is directly placed on the base at the processing position by workers, and the cylinder cover is directly placed due to the fact that the chassis, the support and other structures are arranged on the periphery of the base, so that the cylinder cover is inconvenient to place, the labor intensity of the workers is improved, and the processing efficiency is reduced; and thirdly, after the cylinder cover is placed, a detection device is not arranged, whether the cylinder cover is placed in place or not can be observed only by a worker, and if the cylinder cover is not placed in place or placed snugly, machining is affected, so that machined workpieces are scrapped. Therefore, the applicant of the present invention has applied chinese patent 201910950613.4 with a patent name of "high-precision cylinder head camshaft hole rotary machine", but the base of the structure is mounted on the base, and the positioning pin, the spacer, the cutter bar limiting seat and the shower head are all fixed on the base, so that the top surface of the cylinder head is required to be positioned downwards as a reference surface, and the actual position degree reference surface of the cylinder head camshaft hole is the camshaft hole processed with the top surface downwards on the bottom surface, so that the equipment error plus the processing error between the top surface and the bottom surface of the cylinder head cannot be met by customers with high precision requirements.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art exists, provide one kind and fix a position more accurately to the cylinder head, guarantee machining error minimizing, improve the special machine of improved generation high accuracy cylinder head camshaft hole processing of machining precision.

The utility model discloses improved generation high accuracy cylinder head camshaft hole processing special plane's technical scheme is: the device comprises a frame, wherein a boring cutter conveying and operating device, a cylinder cover positioning, conveying and compressing device, a base lifting device, a cutter bar limiting and spraying lubricating device are arranged on the frame;

the boring cutter conveying and operating device comprises a sliding seat, a sliding table is arranged on the sliding seat and is in sliding fit with the sliding seat, a first servo motor is arranged on one side of the sliding seat, an output shaft of the first servo motor is connected with a screw rod, a nut is arranged below the sliding table, a threaded hole is formed in the nut, the screw rod is matched with the threaded hole, a second servo motor and a power head are arranged on the sliding table, an output shaft of the second servo motor is connected with a driving wheel, a front cutter shaft and a rear cutter shaft are arranged in the power head, one end of each cutter shaft is connected with a synchronous wheel, a synchronous belt is connected between the synchronous wheel and the driving wheel, a boring;

the cylinder cover positioning, conveying and compressing device comprises a base, wherein a base positioning pin and a locking oil cylinder are arranged on the base, the base positioning pin is fixed with the base through a fine adjustment device, a piston rod of the locking oil cylinder is connected with a rotary locking block, an up-down moving oil cylinder is arranged in the base, a piston rod of the up-down moving oil cylinder penetrates through the base to be connected with an upper sliding seat and a lower sliding seat, a front sliding rail and a rear sliding rail are arranged on the upper sliding seat and the lower sliding seat, a front sliding block and a rear sliding block are arranged on the front sliding rail and the rear sliding block, a sliding plate positioning pin and a;

the base lifting device comprises a support, a lifting oil cylinder is arranged on the support, a piston rod of the lifting oil cylinder penetrates through the support to be connected with a lifting seat, a spraying liquid conveying hole and a cleaning lubricating liquid conveying hole are formed in the lifting seat, and a cutter bar limiting and spraying lubricating device is arranged at the lower end of the lifting seat;

the cutter bar limiting and spraying lubricating device comprises a base, wherein the upper end of the base is fixed with a lifting seat, the lower end of the base is provided with a spray head and a copper sleeve seat, the spray head corresponds to a cutter blade of a boring cutter and a camshaft hole on a cylinder cover, the spray head is communicated with a spray liquid conveying hole, a copper sleeve is arranged in the copper sleeve seat, a cutter blade groove and a lubricating groove are formed in the inner wall of the copper sleeve, the boring cutter is matched with the copper sleeve, the cutter blade penetrates through the copper sleeve through the cutter blade groove, a lubricating hole is formed in the lubricating groove, a communicated lubricating hole is formed in the copper sleeve seat, and the lubricating hole is communicated with a cleaning lubricating liquid conveying hole in the lifting seat.

The utility model discloses an improved high-precision machine special for processing a camshaft hole of a cylinder cover, when in work, a worker puts the cylinder cover on a front sliding plate and a rear sliding plate with the bottom surface facing downwards as a positioning surface, a group of positioning holes on the bottom surface of the cylinder cover is matched with positioning pins of the sliding plates on the front sliding plate and the rear sliding plate in a positioning way, then the front sliding plate and the rear sliding plate are driven by a piston rod of a front-and-rear moving oil cylinder to move backwards along the front-and-rear sliding rails, so that another group of positioning holes on the bottom surface of the cylinder cover correspond to positioning pins of a base on a base, then an upper sliding seat and a lower sliding seat are driven by the piston rod of the up-and-down moving oil cylinder to move downwards, the upper sliding seat drives the front-and-rear sliding rails, the front-and-rear, the base of the cutter bar limiting and spraying lubricating device is pressed on the top surface of the cylinder cover (but not tightly pressed), then the upper and lower sliding seats and the cylinder cover are driven by the up-down moving oil cylinder to move upwards by 1 mm-1.5 mm, at the moment, the cutter feeding is started, the first servo motor of the boring cutter conveying and operating device drives the screw rod to rotate, the screw rod is matched with the threaded hole of the nut to drive the nut and the sliding table to move rightwards together, the sliding table drives the second servo motor, the power head, the cutter shaft, the boring cutter and the blade to move rightwards together, so that the boring cutter and the blade pass through the copper bush of the cutter bar limiting and spraying lubricating device copper bush seat and the camshaft hole of the cylinder cover, as the copper bush is provided with the blade groove, the blade can smoothly pass through the copper bush, the up-down moving oil cylinder drives the upper and lower sliding seat and the, the piston rod of the up-down moving oil cylinder drives the up-down sliding seat and the cylinder cover to move downwards by 1mm to 1.5mm, the locking oil cylinder drives the rotary locking block to rotate to buckle the cylinder cover, the cylinder cover is locked and fixed, the second servo motor starts to work to drive the driving wheel to rotate, the driving wheel drives the synchronizing wheel, the cutter shaft, the boring cutter and the blades to rotate through the synchronous belt, the first servo motor rotates reversely to drive the blades to move back gradually, the rotating blades process the inner wall of a camshaft hole of the cylinder cover, five groups of blades process 5 camshaft holes, staggered processing is adopted during processing, wherein 1, 3 and 5 groups of blades are closer to 1, 3 and 5 camshaft holes, and 2 and 4 groups of blades are slightly farther from 2 and 4 camshaft holes, so that 1, 3 and 5 groups of blades process 1, 3 and 5 camshafts firstly and then 2 and 4 groups of blades process 2 and 4 camshaft holes, Machining No. 4 camshaft hole, inputting cutting fluid into a spraying fluid conveying hole and a cleaning lubricating fluid conveying hole of a base while machining, wherein low-pressure cutting fluid is input into the spraying fluid conveying hole, the spraying fluid conveying hole is communicated with a spraying head, low-pressure large-flow cutting fluid sprayed by the spraying head sprays the machining parts of a boring cutter, a blade and a camshaft hole of a cylinder cover in machining, high-pressure cutting fluid is input into the cleaning lubricating fluid conveying hole, the cleaning lubricating fluid conveying hole is communicated with a copper sleeve seat and a copper sleeve, the high-pressure cutting fluid is input into a lubricating groove through the lubricating hole of the copper sleeve to lubricate the contact part of the inner wall of the copper sleeve and the blade until machining is finished, finally, a first servo motor drives all parts of the boring cutter conveying and operating device to reset, the boring cutter conveying and operating device exits from the camshaft hole of the cylinder cover, a lifting oil cylinder drives a base lifting device and a cutter bar limiting device and a spraying lubricating device to move upwards, the locking oil cylinder of the cylinder cover positioning conveying pressing device drives the rotary locking block to rotate and open, then the front and rear sliding blocks and the processed cylinder cover are driven by the front and rear moving oil cylinder to convey forwards to an initial position, a worker takes a workpiece, and the next cylinder cover to be processed is placed. This scheme improved generation high accuracy cylinder head camshaft hole processing special plane sets up the base below, and base locating pin, locking cylinder, slide locating pin and slide cushion set up on the base, and the base then sets up on the lift seat on it, and shower head and copper sheathing seat set up on the base, make the cylinder head use the bottom surface down as the locating surface, have eliminated the machining error between cylinder head top, the bottom surface, and position degree, precision are higher, and the product of processing out is more meticulous.

The utility model discloses improved generation high accuracy cylinder head camshaft hole processing special plane, micromatic setting include the fixing base of L shape, the fixing base is fixed mutually through fastener and base, set up horizontal fine setting adjustment sheet and vertical fine setting adjustment sheet at the fixing base inner wall of L shape, set up the regulation seat between horizontal fine setting adjustment sheet and vertical fine setting adjustment sheet, it has the perforation to open in the regulation seat, the fastener passes the perforation and fixes mutually with the base, sets up the base locating pin on the regulation seat, the base locating pin is fixed mutually through fastener and regulation seat. The horizontal fine adjustment adjusting sheet and the vertical fine adjustment adjusting sheet with different thicknesses can be replaced as required, the positions of the adjusting seat in all directions are finely adjusted, and the base positioning pin on the adjusting seat is finely adjusted, so that the base positioning pin is more accurately matched with the cylinder cover.

The frame on set up the guide holder, the lateral wall of guide holder sets up the guide rail, sets up the lifting slide block at the lateral wall of lifting holder, the lifting slide block cooperatees with the guide rail. The guide rail and the lifting slide block are arranged, so that the guide function is realized on the up-and-down movement of the lifting seat, and the stable and reliable action of the lifting seat is ensured.

The frame on set up the gas detection pole, the inside cavity of gas detection pole, gas detection pole sub-unit connection air pump, gas detection pole upper end is opened has the gas detection hole, sets up sealed depression bar at the lift seat lower extreme, sealed depression bar lower extreme and gas detection hole contact. When the lifting seat is pressed downwards, the sealing pressure rod is in contact with the gas detection rod, if the gas detection hole in the gas detection rod cannot give out gas, the internal gas pressure in the gas detection rod rises, the lifting seat is indicated to move downwards to be in place, otherwise, the lifting seat is indicated to not be pressed downwards to be in place, and the cylinder cover is proved to be not placed well, so that the detection effect is achieved.

Drawings

FIG. 1 is a perspective view of a special improved high-precision machine for machining a camshaft hole of a cylinder head;

FIG. 2 is a schematic structural diagram of the special improved high-precision machine for machining the camshaft hole of the cylinder head;

FIG. 3 is a perspective view of the boring cutter conveying and operating device;

FIG. 4 is a perspective view of the cylinder head positioning and conveying clamp;

FIG. 5 is a schematic structural view of a cylinder head positioning and conveying pressing device;

FIG. 6 is a perspective view showing the fitting state of the base lifting device and the cutter bar limiting and spraying lubricating device;

FIG. 7 is a perspective view of the cutter bar limiting and spraying lubricating device;

fig. 8 is a schematic structural view of the cutter bar limiting and spraying lubricating device.

Detailed Description

The utility model relates to an improved special machine for processing a high-precision cylinder head camshaft hole, which is shown in figures 1-8 and comprises a frame 1, wherein a boring cutter conveying and operating device 2, a cylinder head positioning, conveying and pressing device 4, a base lifting device 6, a cutter bar limiting and spraying lubricating device 7 are arranged on the frame; the boring cutter conveying and operating device 2 comprises a sliding seat 11, a sliding table 20 is arranged on the sliding seat and is in sliding fit with the sliding seat 11, a first servo motor 21 is arranged on one side of the sliding seat, an output shaft of the first servo motor is connected with a screw rod 31, a nut 32 is arranged below the sliding table, a threaded hole is formed in the nut and is matched with the threaded hole, a second servo motor 22 and a power head 23 are arranged on the sliding table, an output shaft of the second servo motor is connected with a driving wheel 24, a front cutter shaft 25 and a rear cutter shaft 25 are arranged in the power head, one end of each cutter shaft is connected with a synchronous wheel 26, a synchronous belt 27 is connected between each synchronous wheel and the driving wheel, a boring cutter 28 is arranged; the cylinder cover positioning, conveying and pressing device 4 comprises a base 12, a base positioning pin 41 and a locking oil cylinder 42 are arranged on the base, the base positioning pin is fixed with the base through a fine adjustment device, a piston rod of the locking oil cylinder is connected with a rotary locking block 43, an up-down moving oil cylinder 44 is arranged in the base 12, a piston rod of the up-down moving oil cylinder penetrates through the base and is connected with an upper sliding seat 45 and a lower sliding seat 45, a front sliding rail 46 and a rear sliding rail 46 are arranged on the upper sliding seat and the lower sliding rail, a front sliding block 47 and a rear sliding block are arranged on the front sliding block and the rear sliding block, a front sliding plate 48 and a rear sliding plate are arranged; the base lifting device 6 comprises a support 13, a lifting oil cylinder 61 is arranged on the support, a piston rod of the lifting oil cylinder penetrates through the support to be connected with a lifting seat 62, a spraying liquid conveying hole and a cleaning lubricating liquid conveying hole are formed in the lifting seat, and a cutter bar limiting and spraying lubricating device 7 is arranged at the lower end of the lifting seat; the cutter bar limiting and spraying lubricating device 7 comprises a base 18, the upper end of the base is fixed with a lifting seat 62, the lower end of the base is provided with a spray head 71 and a copper sleeve seat 72, the spray head corresponds to a cutter blade 29 of a boring cutter 28 and a camshaft hole on a cylinder cover, the spray head is communicated with a spraying liquid conveying hole, the copper sleeve seat 72 is internally provided with a copper sleeve 73, the inner wall of the copper sleeve is provided with a cutter blade groove 74 and a lubricating groove 75, the boring cutter 28 is matched with the copper sleeve, the cutter blade 29 penetrates through the copper sleeve through the cutter blade groove, the lubricating groove is provided with a lubricating hole 76, the copper sleeve seat 72 is provided with a communicated lubricating hole, and the lubricating hole is communicated with a cleaning lubricating liquid conveying hole in the lifting seat. When the device works, a worker puts the cylinder cover on the front and rear sliding plates 48 with the bottom surface facing downwards as a positioning surface, one group of positioning holes on the bottom surface of the cylinder cover is in positioning fit with the sliding plate positioning pins 49 on the front and rear sliding plates, then the front and rear sliding plates 48 are driven by the piston rod of the front and rear moving oil cylinder 51 to move backwards along the front and rear sliding rails 46, so that the other group of positioning holes on the bottom surface of the cylinder cover corresponds to the base positioning pins 41 on the base 12, then the upper and lower sliding seats 45 are driven by the piston rod of the upper and lower moving oil cylinder 44 to move downwards, the upper and lower sliding seats drive the front and rear sliding rails 46, the front and rear sliding blocks 47, the front and rear sliding plates 48 and the cylinder cover to move downwards, so that the other group of positioning holes on the cylinder cover is, The base 18 of the spray lubricating device is pressed on the top surface of the cylinder cover (but not tightly pressed), then the up-down moving oil cylinder 44 drives the up-down sliding base 45 and the cylinder cover to move upwards by 1 mm-1.5 mm, at the moment, the feed starts, the first servo motor 21 of the boring cutter conveying and operating device 2 drives the screw rod 31 to rotate, the screw rod is matched with the threaded hole of the nut 32 to drive the nut and the sliding table 20 to move rightwards together, the sliding table drives the second servo motor 22, the power head 23, the cutter shaft 25, the boring cutter 28 and the blade 29 to move rightwards together, so that the boring cutter 28 and the blade 29 pass through the cutter bar limit, the copper bush 73 of the copper bush seat 72 of the spray lubricating device 7 and the camshaft hole of the cylinder cover, because the copper bush is provided with a blade groove, the blade can smoothly pass through the copper bush, and the up-down moving oil cylinder 44 drives the up-down sliding base 45, after the feeding is finished, a piston rod of an up-and-down moving oil cylinder 44 drives an up-and-down sliding seat 45 and a cylinder cover to move downwards by 1 mm-1.5 mm, a locking oil cylinder 42 drives a rotary locking block 43 to rotate to buckle the cylinder cover, so that the cylinder cover is locked and fixed, a second servo motor 22 starts to work at the moment and drives a driving wheel 24 to rotate, the driving wheel drives a synchronous wheel 26, a cutter shaft 25, a boring cutter 28 and a blade 29 to rotate through a synchronous belt 27, a first servo motor 21 rotates reversely to drive the blade 29 to gradually move back, so that the rotating blade processes the inner wall of a camshaft hole of the cylinder cover, and five groups of blades process 5 camshaft holes, wherein the blades 1, 3 and 5 are staggered, wherein the blades are closer to the camshaft holes 1, 3 and 5, and the blades are slightly farther from the camshaft holes 2 and 4, so that the blades 1, 3 and 5 firstly process the camshaft holes 1, 3 and 5, 3. The No. 5 camshaft is processed, then the No. 2 camshaft holes and the No. 4 camshaft holes are processed by the 2 groups of blades and the 4 groups of blades, cutting fluid is input into a spraying fluid conveying hole and a cleaning lubricating fluid conveying hole of the base 18 during processing, wherein low-pressure cutting fluid is input into the spraying fluid conveying hole, the spraying fluid conveying hole is communicated with a spraying head 71, low-pressure large-flow cutting fluid sprayed out by the spraying head sprays the processing part of the camshaft holes of the boring cutter 28, the blade 29 and the cylinder cover during processing, high-pressure cutting fluid is input into the cleaning lubricating fluid conveying hole, the cleaning lubricating fluid conveying hole is communicated with a copper sleeve base 72 and a copper sleeve 73, high-pressure cutting fluid is input into a lubricating groove 75 through a lubricating hole 76 of the copper sleeve, the contact part of the inner wall of the copper sleeve 73 and the blade 29 is lubricated until processing is finished, and finally all parts of the boring cutter conveying and operating device 2 are driven by a first servo motor 21 to reset, withdrawing from the camshaft hole of the cylinder cover, the lifting oil cylinder 61 drives the base lifting device 6 and the cutter bar limiting and spraying lubricating device 7 to move upwards, the locking oil cylinder 42 of the cylinder cover positioning and conveying pressing device 4 drives the rotary locking block 43 to rotate and open, then the front and rear sliding blocks 47 and the processed cylinder cover are driven by the front and rear moving oil cylinder 51 to convey forwards to the initial position, a worker takes a workpiece, and the next cylinder cover to be processed is put in. This scheme improved generation high accuracy cylinder head camshaft hole processing special plane sets up base 12 below, base locating pin 41, locking cylinder 42, slide locating pin 49 and slide cushion 50 set up on base 12, and base 18 then sets up on the lift seat 62 on it, shower head 71 and copper sheathing seat 72 set up on base 18, make the cylinder head use the bottom surface down as the locating surface, eliminated the cylinder head top, the machining error between the bottom surface, the position degree, the precision is higher, the product that the processing was come out is more meticulous. The fine adjustment device comprises an L-shaped fixed seat 52, the fixed seat is fixed with the base 12 through a fastener, a transverse fine adjustment sheet 53 and a longitudinal fine adjustment sheet 54 are arranged on the inner wall of the L-shaped fixed seat, an adjustment seat 55 is arranged between the transverse fine adjustment sheet and the longitudinal fine adjustment sheet, a through hole 56 is formed in the adjustment seat, the fastener penetrates through the through hole to be fixed with the base, a base positioning pin 41 is arranged on the adjustment seat, and the base positioning pin is fixed with the adjustment seat through the fastener. The transverse fine adjustment adjusting sheet 53 and the longitudinal fine adjustment adjusting sheet 54 with different thicknesses can be replaced as required, the front, back, left and right positions of the adjusting seat 55 are finely adjusted, and the base positioning pin 41 on the adjusting seat 55 is finely adjusted, so that the base positioning pin is more accurately matched with the cylinder cover. The machine frame 1 is provided with a guide seat 14, the side wall of the guide seat is provided with a guide rail 15, the side wall of the lifting seat 62 is provided with a lifting slide block, and the lifting slide block is matched with the guide rail. The guide rail 15 and the lifting slide block play a role in guiding the lifting seat 62 to move up and down, and ensure the stable and reliable action of the lifting seat. The frame 1 on set up gas detection pole 16, gas detection pole inside cavity, gas detection pole lower part connection air pump, gas detection pole upper end is opened has gas detection hole 17, sets up sealed depression bar 63 at the lower extreme of lift seat 62, sealed depression bar lower extreme and gas detection hole contact. When the lifting seat 62 is pressed downwards, the sealing pressure rod 63 is in contact with the gas detection rod 16, if the gas detection hole 17 in the gas detection rod 16 cannot give vent gas, the internal air pressure rises, the lifting seat moves downwards to be in place, otherwise, the lifting seat is not pressed downwards to be in place, and the fact that the cylinder cover is not placed well is proved to play a detection role.

Claims (4)

1. Improved generation high accuracy cylinder head camshaft hole processing special plane, its characterized in that: the device comprises a frame (1), wherein a boring cutter conveying and operating device (2), a cylinder cover positioning, conveying and compressing device (4), a base lifting device (6) and a cutter bar limiting and spraying lubricating device (7) are arranged on the frame;

the boring cutter conveying and operating device (2) comprises a sliding seat (11), a sliding table (20) is arranged on the sliding seat and is in sliding fit with the sliding seat (11), a first servo motor (21) is arranged on one side of the sliding seat, an output shaft of the first servo motor is connected with a lead screw (31), a nut (32) is arranged below the sliding table, a threaded hole is formed in the nut, the lead screw is matched with the threaded hole, a second servo motor (22) and a power head (23) are arranged on the sliding table, an output shaft of the second servo motor is connected with a driving wheel (24), a front cutter shaft and a rear cutter shaft (25) are arranged in the power head, one end of each cutter shaft is connected with a synchronous wheel (26), a synchronous belt (27) is connected between each synchronous wheel and the driving wheel, a boring;

the cylinder cover positioning, conveying and pressing device (4) comprises a base (12), a base positioning pin (41) and a locking oil cylinder (42) are arranged on the base, the base positioning pin is fixed with the base through a fine adjustment device, a piston rod of the locking oil cylinder is connected with a rotary locking block (43), an up-down moving oil cylinder (44) is arranged in the base (12), the piston rod of the up-down moving oil cylinder penetrates through the base and is connected with an upper sliding seat and a lower sliding seat (45), a front sliding rail and a rear sliding rail (46) are arranged on the upper sliding seat and the lower sliding seat, a front sliding block and a rear sliding block (47) are arranged on the front sliding rail and the rear sliding block, a front sliding plate and a rear sliding plate (48) are arranged on the;

the base lifting device (6) comprises a support (13), a lifting oil cylinder (61) is arranged on the support, a piston rod of the lifting oil cylinder penetrates through the support to be connected with a lifting seat (62), a spraying liquid conveying hole and a cleaning lubricating liquid conveying hole are formed in the lifting seat, and a cutter bar limiting and spraying lubricating device (7) is arranged at the lower end of the lifting seat;

the cutter bar limiting and spraying lubricating device (7) comprises a base (18), the upper end of the base is fixed with a lifting seat (62), the lower end of the base is provided with a spray head (71) and a copper sleeve seat (72), the spray head corresponds to a blade (29) of a boring cutter (28) and a camshaft hole on a cylinder cover, the spray head is communicated with a spray liquid conveying hole, the copper sleeve seat (72) is internally provided with a copper sleeve (73), the inner wall of the copper sleeve is provided with a blade groove (74) and a lubricating groove (75), the boring cutter (28) is matched with the copper sleeve, the blade (29) penetrates through the copper sleeve, the lubricating groove is internally provided with a lubricating hole (76), the copper sleeve seat (72) is internally provided with a communicated lubricating hole, and the lubricating hole is communicated with a cleaning lubricating liquid conveying hole in the lifting seat (62).

2. The improved special machine for machining the camshaft hole of the cylinder cover with high precision as claimed in claim 1, wherein: the fine setting device include fixing base (52) of L shape, the fixing base is fixed mutually through fastener and base (12), set up horizontal fine setting adjustment sheet (53) and vertical fine setting adjustment sheet (54) at the fixing base inner wall of L shape, set up regulation seat (55) between horizontal fine setting adjustment sheet and vertical fine setting adjustment sheet, it has perforation (56) to open in the regulation seat, the fastener passes the perforation and fixes mutually with the base, set up base locating pin (41) on the regulation seat, the base locating pin is fixed mutually through fastener and regulation seat.

3. The improved special machine for machining the camshaft hole of the cylinder cover with high precision as claimed in claim 1, wherein: the lifting machine is characterized in that a guide seat (14) is arranged on the machine frame (1), a guide rail (15) is arranged on the side wall of the guide seat, a lifting slide block is arranged on the side wall of the lifting seat (62), and the lifting slide block is matched with the guide rail.

4. The improved special machine for machining the camshaft hole of the cylinder cover with high precision as claimed in claim 1, wherein: the air detection device is characterized in that an air detection rod (16) is arranged on the rack (1), the air detection rod is hollow, the lower portion of the air detection rod is connected with an air pump, an air detection hole (17) is formed in the upper end of the air detection rod, a sealing pressure rod (63) is arranged at the lower end of the lifting seat (62), and the lower end of the sealing pressure rod is in contact with the air detection hole.

Images