Diesel engine shaft hole machine tool boring bar guiding device and maintenance method

Abstract

The present application provides a kind of diesel engine shaft hole machine tool boring bar guiding device and maintenance method, it is related to diesel engine technical field, the guiding device includes boring frame and base, the boring frame is detachably arranged on the base, the boring frame is equipped with boring bar perforation for passing through boring bar, the present application further includes adjusting assembly, adjusting assembly changes thickness to reach the purpose of adjusting boring frame position, to further reach the purpose of adjusting boring bar perforation position, adjusting method is simple and reliable, operation process is simple, ordinary worker can be carried out in machine tool routine maintenance, camshaft hole boring bar guiding device can be quickly adjusted, diesel engine shaft hole machine tool maintenance difficulty and cost are greatly reduced.Maintenance method includes adjusting the position of guiding device;Boring bar test;Trial cutting verification.

Description

TECHNICAL FIELD

[0001] The present application relates to the diesel engine technical field, especially to a kind of diesel engine axle hole machine tool boring bar guiding device and maintenance method. BACKGROUND

[0002] Crankshaft, camshaft and other moving parts are installed in the main shaft hole of diesel engine skeleton 2, camshaft hole, to ensure the working performance of diesel engine, main shaft hole, camshaft hole has higher coaxiality requirement.Diesel engine axle hole machine tool is used for batch processing main shaft hole, camshaft hole high-efficiency special machine tool, through once feeding can complete the cutting processing of all multi-grade axle hole of diesel engine skeleton 2, and ensure the machining accuracy of each axle hole.Referring to Figure 1 Diesel engine axle hole machine tool is mainly composed of bed 6, sliding table 7, power head 4, machine tool fixture 1, main shaft hole boring bar 5, camshaft hole boring bar 3 and other parts, wherein, referring to Figure 2 Machine tool fixture 1 is composed of front positioning plate 12, rear positioning plate 8, main shaft hole boring bar guiding device 10, camshaft hole boring bar guiding device 9 and clamping body 11.Machine tool fixture is used for positioning and pressing of diesel engine skeleton 2 and positioning and guiding of axle hole boring bar, power head provides power for axle hole boring bar, and axle hole boring bar is processed to axle hole of diesel engine skeleton 2 under the positioning and guiding of boring bar guiding device and the driving of power head.

[0003] To ensure the coaxiality of multi-grade axle hole of diesel engine skeleton 2, it is necessary to ensure the straightness of boring bar during cutting process of diesel engine axle hole machine tool.To ensure the straightness of boring bar, boring bar is generally positioned by front and rear positioning plates, and for large diesel engine skeleton 2, multiple guiding devices are also needed to be arranged between front and rear positioning plates to guide and support boring bar to prevent bending of boring bar under force during work.Camshaft hole has larger length-diameter ratio than main shaft hole, and its boring bar is more slender, therefore, more intermediate guiding devices are arranged;Due to small inner cavity of diesel engine skeleton 2, to prevent interference, camshaft hole boring bar guiding device is generally thin, which causes its small rigidity.Camshaft hole boring bar guiding device (hereinafter referred to as guiding device) is usually composed of boring frame, guide sleeve, scrap circle, front cover plate, rear cover plate and the like, boring frame is the main body of guiding device, installed on machine tool base, guide sleeve is installed in boring frame, after coaxiality adjustment of guide sleeves of each guiding device, boring frame is fixed on machine tool base through screw, and the position of each guiding device is fixed by two round pins.

[0004] The above structure can guarantee the coaxiality of the guide sleeves of the guide devices, thereby guaranteeing the straightness of the boring bar during work and meeting the coaxiality precision of the camshaft holes. However, the structure has the following shortcomings: once the guide devices are displaced due to deformation, collision and other reasons after the diesel engine machine tool is in service for a long time, the coaxiality of the guide sleeves is out of tolerance, which causes the straightness of the boring bar during work to be out of tolerance, and the coaxiality of the camshaft holes processed is out of tolerance. At this time, the position of the guide device needs to be adjusted by maintenance personnel. Specifically, two positioning pins are first disassembled, screws are loosened, the positions of the guide devices are corrected, the screws are fastened, the positioning pin holes are reassembled, and the positioning pins are installed. The above operation requires a high skill level of the maintenance personnel, is complicated to operate, has a large workload, has a long maintenance period, and seriously affects the production efficiency. Especially when the boring bar hole position is too high, it cannot be solved by adjusting method, and qualified guide devices must be replaced, which significantly increases the machine tool maintenance cost. SUMMARY

[0005] Therefore, one of the purposes of the present application is to provide a boring bar guide device of a diesel engine shaft hole machine tool to solve the technical problems in the prior art that the boring bar guide device adopts positioning pins to position the guide sleeves, which requires a high skill level of maintenance personnel, causes complicated operation, a large workload, a long maintenance period, and seriously affects the production efficiency.

[0006] Another purpose of the present application is to provide a maintenance method of a boring bar guide device of a diesel engine shaft hole machine tool.

[0007] In order to achieve one of the above purposes, the present application provides a boring bar guide device of a diesel engine shaft hole machine tool, which comprises a boring frame and a base. The boring frame is detachably arranged on the base. The boring frame is provided with a boring bar hole for passing through the boring bar. An adjusting assembly for adjusting the position of the boring bar hole is arranged between the boring frame and the base. The thickness of the adjusting assembly can be changed.

[0008] According to an optional embodiment, the base is provided with a mounting groove. The bottom of the boring frame and the adjusting assembly are arranged in the mounting groove.

[0009] According to an optional embodiment, the adjusting assembly comprises a horizontal pad plate and a vertical pad plate. The horizontal pad plate is arranged at the bottom of the boring frame and is used to adjust the height position of the boring bar hole. The vertical pad plate is arranged at the side of the boring frame and is used to adjust the left-right position of the boring bar hole.

[0010] According to an optional embodiment, the thickness of the horizontal pad plate and the vertical pad plate is changed by grinding or adding a gasket between the horizontal pad plate and the vertical pad plate and the base.

[0011] According to an optional embodiment, the outer side of the base is provided with a fastening assembly for strengthening the connection degree of the boring frame and the adjusting assembly.

[0012] According to an optional embodiment, the fastening assembly comprises a pressing plate and a fastening column, the pressing plate is arranged outside the base, and the pressing plate is connected with the base through the fastening column.

[0013] In order to achieve the second purpose, the application provides a maintenance method of the boring bar guiding device of the diesel engine shaft hole machine tool, which comprises the following steps:

[0014] Step S1: adjusting the position of the guiding device;

[0015] Step S2: boring bar test;

[0016] Step S3: test cutting verification.

[0017] According to an optional embodiment, the step S1 of adjusting the position of the guiding device comprises:

[0018] S11: collecting multiple diesel engine skeleton camshaft hole coaxiality detection reports, determining the guiding device to be adjusted by analyzing the coordinate positions of the camshaft hole of each file, and making a record;

[0019] S12: rotating the machine tool hand wheel, passing the camshaft hole boring bar from the front positioning plate and the guiding device not to be adjusted, and positioning the camshaft hole boring bar in front of the guiding device to be adjusted, and adsorbing the dial gauge and the dial gauge holder on the outer surface of the end of the camshaft hole boring bar;

[0020] S13: disassembling the second inner hexagonal screw of the fixed front cover plate of the guiding device to be adjusted, removing the front cover plate, disassembling the scrap ring, and wiping the inner hole of the guide sleeve clean;

[0021] S14: disassembling the oil pipe of the guiding device to be adjusted, and loosening the fastening column of the right pressing plate of the guiding device;

[0022] S15: rotating the machine tool hand wheel, adjusting the position of the dial gauge, and making the measuring head of the dial gauge touch the generatrix in the inner hole of the guide sleeve of the guiding device to be adjusted, observing the reading of the dial gauge and recording the corresponding data, and then reversing the machine tool hand wheel to withdraw the dial gauge;

[0023] S16: keeping the camshaft hole boring bar from rotating, rotating the dial gauge and the dial gauge holder along the center of the camshaft hole boring bar, and observing the reading of the dial gauge and recording the corresponding data at 90°, 180° and 270° directions respectively;

[0024] S17: judging the vertical position of the guide sleeve according to the data, if the position is too high, disassembling the inner hexagonal screw at the bottom of the guiding device to be adjusted, removing the transverse pad, and grinding a certain thickness of the transverse pad according to the recorded data; if the position is too low, a certain thickness of copper sheet is placed on the transverse pad;

[0025] S18: Similarly, according to the data, it is judged whether the horizontal position of the guide sleeve is correct. If not, a certain thickness of copper sheet is ground on the transverse pad plate or a certain thickness of copper sheet is padded on the transverse pad plate;

[0026] S19: The bottom hexagonal socket cap screws and the fastening columns of the fixed pressing plate of the guide device that need to be adjusted are sequentially pre-tightened;

[0027] S20: The data at 0°, 90°, 180° and 270° are measured again by using the dial indicator, and after ensuring that the center of the guide sleeve coincides with the axis of the camshaft hole boring bar, the hexagonal socket cap screws and the fastening columns are sequentially tightened;

[0028] S21: The above steps are repeated, and the positions of the remaining guide devices that need to be adjusted are sequentially adjusted in the order from front to back;

[0029] S22: The oil pipes of all the adjusted guide devices are connected, and the scrap ring and the front cover plate are installed.

[0030] According to an optional embodiment, the boring bar test of step S2 comprises:

[0031] S21: The inner hole surface of all the guide sleeves of the guide devices is cleaned and coated with lubricating oil;

[0032] S22: The camshaft hole boring bar is sequentially inserted into the guide sleeves of the 1st, 2nd, 3rd… guide devices in the order from front to back by rotating the hand wheel of the machine tool, and the reading of the servo load table during the boring bar insertion is observed. If the load exceeds 40%, it means that the boring bar guide device is not adjusted correctly, and needs to be adjusted again.

[0033] S23: After the boring bar test is completed, the machine tool is started for 20 minutes of empty running test, and whether the temperature of the guide device is normal is observed. If the temperature abnormally rises, it needs to be adjusted again.

[0034] According to an optional embodiment, the test cutting verification of step S3 comprises:

[0035] S31: The cutters of each gear of the main shaft hole boring bar and the camshaft hole boring bar are adjusted, and a certain amount of allowance is left for final machining;

[0036] S32: The diesel engine frame after semi-finishing machining is installed, the machine tool is started to machine the main shaft hole and the camshaft hole, and sufficient cooling liquid should be provided during the machining process;

[0037] S33: After the machining is completed, the diesel engine frame is precisely measured by using a three-coordinate machine, and a camshaft hole coaxiality detection report is issued;

[0038] S34: If the coaxiality is qualified, the guide device maintenance work is completed. If it is still unqualified, the adjustment needs to be continued according to the above method until it is qualified.

[0039] The diesel engine shaft hole machine tool boring bar guiding device has the following technical effects.

[0040] The diesel engine shaft hole machine tool boring bar guiding device has the following technical effects.

[0041] The adjusting assembly includes a horizontal pad plate and a vertical pad plate, the horizontal pad plate is located at the bottom of the boring frame and is used for adjusting the height of the boring bar hole, and the vertical pad plate is located at the side of the boring frame and is used for adjusting the left-right position of the boring bar hole. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0043] Figure 1 is a structural schematic diagram of a diesel engine shaft hole machine tool in the prior art;

[0044] Figure 2 is Figure 1 is a machine tool clamp structure schematic diagram of a diesel engine shaft hole machine tool in the prior art;

[0045] Figure 3 is a front view of the boring bar guiding device in an embodiment of the present application;

[0046] Figure 4 is Figure 3 is a sectional view of the boring bar guiding device in the prior art;

[0047] Figure 5 is Figure 3 is a left sectional view of the boring bar guiding device in the prior art.

[0048] Among them, Figures 1-5 :

[0049] Prior art:

[0050] 1, machine tool fixture; 2, diesel engine skeleton; 3, camshaft hole boring bar; 4, power head; 5, main shaft hole boring bar; 6, bed; 7, sliding table; 8, rear positioning plate; 9, camshaft hole boring bar guide device; 10, main shaft hole boring bar guide device; 11, clamping body;

[0051] The present application:

[0052] 12, front positioning plate; 13, guide sleeve; 14, boring frame; 15, vertical backing plate; 16, transverse backing plate; 17, pressing plate; 18, rear cover plate; 19, front cover plate; 20, chip scraping ring; 21, inner hexagonal screw; 22, second inner hexagonal screw; 23, fastening column; 24, oil pipe; 25, base. DETAILED DESCRIPTION

[0053] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0054] Referring to Figures 3-5 As shown in the drawings, the present application provides a diesel engine shaft hole machine tool boring bar guide device, which comprises a base 25, a boring frame 14, a guide sleeve 13, a chip scraping ring 20, a front cover plate 19, a rear cover plate 18, a transverse backing plate 16, a vertical backing plate 15, a pressing plate 17, an inner hexagonal screw 21, etc. The number of the inner hexagonal screws 21 is five. The guide sleeve 13 is installed in the hole of the boring frame 14. Two chip scraping rings 20 are respectively installed at both ends of the guide sleeve 13 and are fixed by the front cover plate 19 and the rear cover plate 18 through the second inner hexagonal screws 22. The number of the second inner hexagonal screws 22 is eight. The boring frame 14 is fixed on the machine tool base 25 through the inner hexagonal screws 21. The transverse backing plate 16 is located between the base 25 and the bottom surface of the boring frame 14. The vertical backing plate 15 is located between the base 25 and the left side surface of the boring frame 14. The pressing plate 17 is installed on the right side surface of the base 25 through the fastening columns 23 and presses the boring frame 14 tightly. The number of the fastening columns 23 is two.

[0055] To ensure that the guide device can be pressed tightly effectively, the right side surface of the boring frame 14 protrudes 1.5 mm from the right side surface of the base 25.

[0056] The present application also provides a maintenance method for the diesel engine shaft hole machine tool boring bar guide device, which comprises the following steps:

[0057] S1: adjusting the position of the guide device, specifically as follows:

[0058] a. Collect multiple diesel engine skeleton camshaft hole coaxiality detection report, through the analysis of each file camshaft hole coordinate position to determine the need to adjust the guide device and make a record.

[0059] b. Shake the machine hand wheel, the camshaft hole boring bar 3 from the front positioning plate 12 and the guide device through and positioned in front of the need to adjust the guide device, the dial and table suction on the camshaft hole boring bar 3 end surface.

[0060] c. Remove the need to adjust the guide device fixed front cover plate 19 of the second inner hexagonal screw 22, remove the front cover plate 19, remove the chip ring 20, wipe the guide sleeve 13 hole clean.

[0061] d. Remove the need to adjust the guide device oil pipe 24, loosen the need to adjust the guide device right side fixed pressure plate 17 of the fastening column 23 and the need to adjust the guide device bottom inner hexagonal screw 21.

[0062] e. Shake the machine hand wheel, adjust the dial position, so that its measuring head touches the need to adjust the guide device guide sleeve 13 hole on the bus line (need to avoid the tool slot), observe the dial reading and record the corresponding data, then reverse the machine hand wheel and exit the dial.

[0063] f. Keep the camshaft hole boring bar 3 from rotating, turn the dial and table along the center of the camshaft hole boring bar 3, and observe the dial reading and record the corresponding data at 90°, 180°, 270°, respectively.

[0064] g. According to the data, determine the vertical position of the guide sleeve 13. If the position is too high, remove the need to adjust the guide device bottom inner hexagonal screw 21, remove the horizontal pad 16, and grind the horizontal pad 16 to a certain thickness according to the recorded data; if the position is too low, pad a certain thickness of copper on the horizontal pad 16.

[0065] h. Similarly, according to the data, determine whether the horizontal position of the guide sleeve 13 is correct. If not, grind the vertical pad 15 to a certain thickness or pad a certain thickness of copper on the vertical pad 15.

[0066] i. Tighten the need to adjust the guide device bottom inner hexagonal screw and the fastening column 23 of the fixed pressure plate 17 in turn.

[0067] j. Measure the 0°, 90°, 180°, 270° data again with the dial to ensure that the center of the guide sleeve 13 coincides with the axis of the camshaft hole boring bar 3, and then tighten the inner hexagonal screw 21 and the fastening column 23 in turn.

[0068] k. Repeat the above steps and adjust the positions of the remaining guide devices in order from front to back.

[0069] 1. Connect all the adjusted guide devices with the oil pipe 24, install the scrap ring 20 and the front cover plate 19.

[0070] S2: boring bar test, as follows:

[0071] a. Clean the inner hole surface of all guide device guide sleeves 13 and apply lubricating oil.

[0072] b. Shake the machine tool hand wheel, and sequentially pass the camshaft hole boring bar 3 into the first, second, third… guide device guide sleeve 13 from front to back, observe the servo load table reading during the boring bar test, if the load exceeds 40%, it means that the boring bar guide device is not adjusted correctly, and needs to be adjusted again.

[0073] c. After the boring bar test is completed, start the machine tool for 20 minutes of empty running test, observe whether the temperature of the guide device is normal, if the temperature abnormally rises, it needs to be adjusted again.

[0074] S3: trial cutting verification, as follows:

[0075] a. Adjust the main shaft hole boring bar 5 and the camshaft hole boring bar 3 of each gear cutter, and leave a certain amount for final machining.

[0076] b. Install the semi-finished diesel engine frame 2, start the machine tool to machine the main shaft hole and the camshaft hole, and sufficient cooling liquid should be provided during the machining process.

[0077] c. After the machining is completed, the diesel engine frame 2 is precisely measured by the three-coordinate machine, and the camshaft hole coaxity detection report is issued.

[0078] d. If the coaxity is qualified, the guide device maintenance work is completed, if it is still unqualified, it needs to be adjusted according to the above method until it is qualified.

[0079] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0080] In the description of the application, it also needs to be explained that unless there is a clear and specific provision and limitation, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0081] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of maintaining a guide for a boring bar of a diesel engine shaft hole machine, characterized in that, The diesel engine shaft hole machine tool boring bar guiding device comprises a boring frame and a base, the boring frame is detachably arranged on the base, a boring bar hole for passing through a boring bar is arranged on the boring frame, an adjusting assembly for adjusting the position of the boring bar hole is arranged between the boring frame and the base, and the thickness of the adjusting assembly can be changed; an installation groove is arranged on the base, the bottom of the boring frame and the adjusting assembly are arranged in the installation groove; the adjusting assembly comprises a horizontal pad plate and a vertical pad plate, the horizontal pad plate is arranged on the bottom of the boring frame and is used for adjusting the height position of the boring bar hole, and the vertical pad plate is arranged on the side of the boring frame and is used for adjusting the left-right position of the boring bar hole; the thickness of the horizontal pad plate and the vertical pad plate is changed by grinding or adding a gasket between the horizontal pad plate, the vertical pad plate and the base; a fastening assembly for strengthening the connection degree of the boring frame and the adjusting assembly is arranged on the outside of the base; the fastening assembly comprises a pressing plate and a fastening column, the pressing plate is arranged on the outside of the base and is connected with the base through the fastening column; The method comprises the following steps: Step S1: adjusting the position of the guiding device; Step S2: boring bar test; Step S3: trial cutting verification; The step S1 of adjusting the position of the guiding device comprises: S11: collecting multiple diesel engine skeleton camshaft hole coaxiality detection reports, determining the guiding device to be adjusted by analyzing the coordinate positions of the camshaft holes in each file, and making a record; S12: rotating the machine tool hand wheel, passing the camshaft hole boring bar through the front positioning plate and the guiding device not to be adjusted and positioning in front of the guiding device to be adjusted, and sucking the dial gauge and the dial gauge holder on the outer surface of the end of the camshaft hole boring bar; S13: removing the second inner hexagonal screw of the front cover plate of the guiding device to be adjusted, taking off the front cover plate, removing the scrap ring, and wiping the inner hole of the guide sleeve clean; S14: removing the oil pipe of the guiding device to be adjusted and loosening the fastening column of the right pressing plate of the guiding device; S15: rotating the machine tool hand wheel, adjusting the position of the dial gauge, making the measuring head of the dial gauge touch the generatrix in the inner hole of the guide sleeve of the guiding device to be adjusted, observing the reading of the dial gauge and recording the corresponding data, and then reversing the machine tool hand wheel to withdraw the dial gauge; S16: keeping the camshaft hole boring bar from rotating, rotating the dial gauge and the dial gauge holder along the center of the camshaft hole boring bar, and observing the reading of the dial gauge and recording the corresponding data at 90°, 180° and 270° respectively; S17: judging the vertical position of the guide sleeve according to the data, if the position is too high, removing the inner hexagonal screw at the bottom of the guiding device to be adjusted, taking out the horizontal pad plate, and grinding a certain thickness of the horizontal pad plate according to the recorded data; if the position is too low, adding a certain thickness of copper sheet on the horizontal pad plate; S18: judging whether the horizontal position of the guide sleeve is correct according to the data, if not, grinding a certain thickness of the horizontal pad plate or adding a certain thickness of copper sheet on the horizontal pad plate; S19: sequentially pre-tightening the inner hexagonal screw at the bottom of the guiding device to be adjusted and the fastening column of the fixed pressing plate; S20: measuring the data at 0°, 90°, 180° and 270° again by using the dial gauge, ensuring that the center of the guide sleeve coincides with the axis of the camshaft hole boring bar, and then sequentially tightening the inner hexagonal screw and the fastening column; S21: Repeat the above steps to adjust the positions of the remaining guide devices in order from front to back; S22: Connect all oil pipes with adjusted guide devices, and install the scraper ring and front cover plate.

2. The method of maintaining a diesel engine shaft hole machine tool boring bar guide as defined in claim 1, wherein, The boring bar test in step S2 includes: S21: Clean the inner surface of all guide sleeves and apply lubricating oil; S22: Rotate the machine tool handwheel and insert the camshaft hole boring bar into the guide sleeves of the 1st, 2nd, 3rd... guide devices in the order from front to back. Observe the servo load meter reading during the boring bar insertion process. If the load exceeds 40%, it means that the boring bar guide device is not adjusted correctly and needs to be readjusted. S23: After the boring bar test is completed, start the machine tool for a 20-minute no-load test and observe whether the temperature of the guide device is normal. If the temperature rises abnormally, it needs to be readjusted.

3. The method of maintaining a diesel engine shaft hole machine tool boring bar guide as defined in claim 1, wherein, The trial cutting verification in step S3 includes: S31: Adjust the tool settings of the spindle bore boring bar and camshaft bore boring bar to leave a certain allowance for final machining; S32: Install the semi-finished diesel engine frame, start the machine tool to machine the spindle hole and camshaft hole, and provide sufficient coolant during the machining process; S33: After machining, the diesel engine frame will be precisely measured by a coordinate measuring machine, and a camshaft hole coaxiality test report will be issued. S34: If the coaxiality is qualified, the maintenance of the guide device is completed. If it is still not qualified, the above method must be used to continue the adjustment until it is qualified.

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