CN113579290A - Combined tool and method for machining inclined hole of cylinder cover of marine diesel engine - Google Patents
Combined tool and method for machining inclined hole of cylinder cover of marine diesel engine Download PDFInfo
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- CN113579290A CN113579290A CN202110663981.8A CN202110663981A CN113579290A CN 113579290 A CN113579290 A CN 113579290A CN 202110663981 A CN202110663981 A CN 202110663981A CN 113579290 A CN113579290 A CN 113579290A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003754 machining Methods 0.000 title claims description 17
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/04—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part adjustable in inclination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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Abstract
A combined tool and a method for processing inclined holes of a cylinder cover of a marine diesel engine are disclosed, wherein the combined tool comprises a bottom plate, a jacking device, a first backer, a second backer, a curved surface T-shaped groove block, a curved surface T-shaped nut, a pressing plate and a stud; the jacking device arranged on the bottom plate jacks up the cylinder cover, the backer with a corresponding angle is replaced to adapt to the processing of inclined holes with different angles, and meanwhile, the cylinder cover is pressed and fixed through the curved surface T-shaped groove block, the curved surface T-shaped nut, the stud and the pressing plate, so that the axis of the inclined hole is parallel to the axis of the spindle of the horizontal boring machine, and the automatic vertical of the tensioning force to the end face of the cylinder cover is realized within the range of +/-18 degrees. The invention can conveniently and effectively adjust the angle of the tool on the premise of not occupying the travelling crane, processes inclined holes with different angles on the cylinder cover, realizes that the tension force is automatically vertical to the end surface of the cylinder cover, ensures the stability and reliability of locking, and has the advantages of strong universality, low process cost, high operation efficiency and small operation difficulty.
Description
Technical Field
The invention relates to a processing technology of a cylinder cover of a marine diesel engine, in particular to a combined tool and a method for processing an inclined hole of the cylinder cover of the marine diesel engine, and belongs to the technical field of diesel engine manufacturing.
Background
With the continuous upgrading of diesel engine products for dual-fuel ships and the continuous improvement of the air pressure and oil pressure rated pressure of related pipelines, the existing strength and sealing of the external pipelines of the key parts of the diesel engine cylinder cover cannot meet the requirements of the existing pressure, so that the structure of the external oil pipes and the air pipes is changed into the structure of directly drilling holes on the cylinder cover. Therefore, a large number of small-diameter deep holes with the length-diameter ratio exceeding 80 at different angles are added on the cylinder cover, and the thinnest part of the wall thickness among the holes is only 7mm, which brings great difficulty to the processing of the cylinder cover.
The traditional processing of inclined hole is equipped with inclined hole 3 on cylinder head 4 and needs processing as shown in figure 1 at present, and processing is put on workstation 1 with the frock including backer 2, connecting bolt 5, coupling nut 6 and gland 7, is equipped with the inclined plane that the oblique angle is the same with inclined hole 3 on the backer 2. During machining, the backer 2 is fixed on the workbench 1, the cylinder cover 4 is placed on the inclined plane of the backer 2 and is tightly attached to the positioning surface, and the axis of the machined inclined hole 3 is in a horizontal position so as to facilitate machining; a connecting bolt 5 penetrates through a center hole of a gland 7 and an inner hole of a cylinder cover 4, the lower end of the connecting bolt is screwed into a threaded hole on the inclined plane of the backer 2, the upper end of the connecting bolt is connected with a connecting nut 6, and meanwhile, the connecting bolt 5 must be vertical to the inclined plane of the backer 2; by tightening the coupling nut 6, the cylinder head 4 is reliably fixed to the backer 2 by the gland 7, and the machining of the inclined hole 3 is started.
If the inclination angles of the inclined holes 3 processed at each time are different, the cylinder cover 4 needs to be lifted away, and then the backer 2 with the inclined planes with different angles needs to be replaced, so that the resources of the traveling crane equipment need to be occupied for a long time in the operation, and in order to meet the processing requirements of deep holes with various angles on the cylinder cover 4, the backer with a plurality of corresponding angles needs to be manufactured, and the tooling cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a combined tool and a method for machining inclined holes of a cylinder cover of a marine diesel engine, which can conveniently and effectively adjust the angle of the tool on the premise of not occupying a travelling crane and machine each inclined hole of the cylinder cover, thereby improving the universality of the tool and reducing the processing cost.
In order to achieve the above object, the technical solution of the present invention is as follows:
the utility model provides a combination frock for marine diesel cylinder head inclined hole processing, installs on the workstation of horizontal boring machine, be equipped with the inclined hole that becomes an oblique angle with the level that needs processing on the cylinder head, its characterized in that, combination frock including:
the bottom plate is fixedly arranged on the workbench, and a key groove and a mounting hole are formed in the upper plane of the bottom plate;
the jacking device is inserted into the mounting hole of the bottom plate and used for jacking the cylinder cover;
the first and second buttresses are respectively embedded in the key grooves of the bottom plate and used for arranging and positioning the cylinder cover;
the curved surface T-shaped groove block is fixedly connected to the bottom plate;
the curved surface T-shaped nut is arranged below the curved surface T-shaped groove block and above the bottom plate and clings to the lower surface of the curved surface T-shaped groove block;
a pressure plate disposed above the cylinder head;
the double-end stud penetrates through an inner hole of the cylinder cover, the lower end of the double-end stud is connected with the curved surface T-shaped nut, the upper end of the double-end stud penetrates through the pressing plate and is tightly connected with the nut, and the cylinder cover is pressed and fixed and positioned on the first backrest and the second backrest through the pressing plate.
Furthermore, the first backer and the second backer are provided with positioning surfaces which are tightly attached to the bottom of the cylinder cover, and the inclined hole in the cylinder cover is in a horizontal position and is parallel to the axis of the main shaft of the horizontal boring machine.
Further, the first support and the second support determine the inclination angle of the positioning surface according to different inclination angles of the inclined hole to be processed.
Further, the lower face of the curved surface T-shaped groove block is an inner spherical face, the central portion of the curved surface T-shaped groove block is provided with a through hole used for passing through the stud, the curved surface T-shaped nut is in an inverted bowl shape, the upper portion of the curved surface T-shaped nut is an outer spherical face, the curved surface T-shaped groove block and the inner spherical face of the curved surface T-shaped groove block are tightly attached and slide with each other, and the central portion of the curved surface T-shaped nut is provided with a threaded hole connected with the stud.
Furthermore, a curved surface T-shaped nut connected with the stud bolt slides and swings along the inner spherical surface of the curved surface T-shaped groove block, so that the axis of the stud bolt is inclined within the range of +/-18 degrees, and the inclined angle of the stud bolt is automatically equal to the inclined angle of the inclined hole.
Furthermore, the first backer, the second backer and the arc-shaped T-shaped groove block are connected with the bottom plate through hexagon socket head cap screws and are positioned with the bottom plate through positioning pins.
Further, the jacking device comprises a jacking rod and a jacking rod sleeve, wherein the jacking rod is connected to the upper part of the jacking rod sleeve through threads and the height of the whole jacking device is adjusted through threaded rotation.
Furthermore, the top of the ejector rod is a spherical surface.
The other technical scheme of the invention is as follows:
a machining method for the inclined hole of the cylinder cover of the marine diesel engine, which is realized by adopting the combined tool, comprises the following steps:
1) selecting a corresponding first backer and a corresponding second backer according to the oblique angle of an oblique hole to be processed, lowering the jacking device to the minimum, inserting the jacking device into the mounting hole of the bottom plate, respectively embedding the first backer and the second backer into the key slot of the bottom plate, connecting the curved surface T-shaped nut to the lower end of the stud, enabling the stud to penetrate through the curved surface T-shaped slot block, and fixing the curved surface T-shaped slot block on the bottom plate through an inner hexagon screw;
2) mounting the bottom plate assembled in the step 1) and the components on the bottom plate on the workbench, lifting and placing the cylinder cover on the first backer and the second backer, enabling the cylinder cover to be tightly attached to the first backer and the second backer, and enabling the axis of the inclined hole to be automatically in a horizontal position and to be parallel to the axis of a main shaft of the horizontal boring machine;
3) the upper end of the stud penetrates through the pressing plate and is connected with the nut, and the nut is screwed to press and fix the cylinder cover through the pressing plate; along with the tightening of the nut and the increase of the tensioning force, the curved surface T-shaped nut slides in the curved surface T-shaped groove block, the axis of the stud automatically coincides with the axis of the inner hole of the cylinder cover, and the tensioning force is automatically perpendicular to the end face of the cylinder cover;
4) processing the inclined hole, and starting preparation work for processing an upper inclined hole and a lower inclined hole of the cylinder cover after the inclined hole is processed;
5) loosening the nut to disengage the pressure plate from the cylinder head, rotating the jacking device to jack the cylinder head up and out of engagement with the first and second abutments;
6) selecting a corresponding new first backer and a new second backer according to the bevel angle of another inclined hole to be processed, and replacing the original first backer and the original second backer with the new first backer and the new second backer;
7) rotating the jacking device to enable the cylinder cover to descend until the lower portion of the cylinder cover is completely attached to the new first backer and the new second backer, and then screwing the nut and tightly pressing and fixing the cylinder cover through the pressing plate;
8) processing the next inclined hole;
9) and 5) repeating the steps 5) to 8) until all the inclined holes are machined.
Further, in the step 3), the stud swings within a range of ± 18 °.
Compared with the prior art, the invention has the beneficial effects that:
1) the universality is strong; the tool can be suitable for processing inclined holes with different angles on the same cylinder cover and processing inclined holes on different cylinder covers of similar machine types by only using the same bottom plate and replacing the backer with different inclined planes, and a plurality of special tools are prepared without replacing the whole backer, so that the process cost for processing the cylinder cover is reduced.
2) The combined tool is provided with the jacking device, the cylinder cover can be jacked up automatically when the backer is replaced, the backer is replaced quickly, a vehicle does not need to be driven in a workshop, the operation difficulty is reduced, and the operation efficiency is improved.
3) The curved surface T-shaped groove block is matched with the curved surface T-shaped nut in a swinging mode, the double-end stud can be tensioned in any angle direction within the range of +/-18 degrees, the axis of the double-end stud is automatically overlapped with the axis of an inner hole of the cylinder cover, the tensioning force is automatically perpendicular to the end face of the cylinder cover, and therefore the stability and the reliability of locking of the cylinder cover are guaranteed.
Drawings
Fig. 1 is a schematic view of a conventional tool.
Fig. 2 is a top view of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a sectional view B-B of fig. 2.
Fig. 5 is an enlarged view of the portion C of fig. 3.
FIG. 6 is a schematic view of the swing range of the stud.
Fig. 7 is an operational state diagram of the present invention.
In the figure, the position of the upper end of the main shaft,
1-workbench, 2-backer, 3-inclined hole, 4-cylinder cover, 5-connecting bolt, 6-connecting nut, 7-gland, 9-bottom plate, 10-jacking device, 11-curved surface T-shaped groove block, 12-curved surface T-shaped nut, 13-stud, 15-pressing plate, 16-nut, 17-first backer, 18-second backer.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments, but the following embodiments are not intended to limit the scope of the invention, and all equivalent substitutions and modifications made in accordance with the contents of the present specification shall fall within the technical scope of the claimed invention.
The combined tool is arranged on a workbench of a horizontal boring machine and used for processing inclined holes on a cylinder cover of a marine diesel engine, the cylinder cover is provided with a plurality of inclined holes which need to be processed and have different inclined angles with the horizontal direction, and after the cylinder cover is clamped on the combined tool, the axis of the processed inclined holes is automatically parallel to the axis of a main shaft of the horizontal boring machine.
Referring to fig. 2, 3, 4 and 5, the combined tool includes a bottom plate 9, a jacking device 10, a first support 17, a second support 18, a curved T-shaped groove block 11, a curved T-shaped nut 12, a pressing plate 15 and a stud 13.
The bottom plate 9 is fixedly installed on a horizontal rotary table of the horizontal boring machine, and a key groove for installing the first backer 17 and the second backer 18 and an installation hole for installing the jacking device 10 are formed on the upper plane of the bottom plate 9.
The jacking devices 10 are inserted into the mounting holes of the bottom plate 9, and the number of the jacking devices is three, wherein two jacking devices are arranged at the front part of the bottom plate 9, and one jacking device is arranged at the rear part of the bottom plate 9 and is used for jacking the cylinder cover 4. The jacking device 10 comprises a jacking rod and a jacking rod sleeve, the jacking rod is connected to the upper part of the jacking rod sleeve through threads, and the jacking rod is lifted and lowered through thread rotation, so that the height of the whole jacking device 10 is adjusted. The top of the ejector rod is a spherical surface and is in contact with the lower end surface of the cylinder cover 4, and the ejector rod plays a role in jacking or descending the cylinder cover 4 through rotation.
The first and second buttresses 17 and 18 are used for mounting and positioning the cylinder head 4, are respectively embedded in the key grooves of the bottom plate 9, are fixedly connected with the bottom plate 9 through hexagon socket head cap screws, and are positioned with the bottom plate 9 through positioning pins. The first backer 17 and the second backer 18 are provided with positioning surfaces which are tightly attached to the bottom of the cylinder cover 4; the inclination angles of the positioning surfaces of the first and second buttresses 17 and 18 are determined according to different inclination angles of the inclined hole 3 to be processed, and the determined inclination angles of the positioning surfaces can enable the axis of the inclined hole 3 on the cylinder cover 4 to be automatically in a horizontal position and to be parallel to the axis of the main shaft of the horizontal boring machine.
Referring to fig. 5, the curved T-shaped slot block 11 is connected to the bottom plate 9 by a socket head cap screw and is positioned with the bottom plate 9 by a positioning pin. The lower surface of the curved surface T-shaped groove block 11 is an inner spherical surface, and the center of the curved surface T-shaped groove block is provided with a through hole for passing through the stud 13.
The curved surface T-shaped nut 12 is arranged below the curved surface T-shaped groove block 11 and above the bottom plate 9, and is tightly attached to the lower surface of the curved surface T-shaped groove block 11. The curved surface T-shaped nut 12 is in an inverted bowl shape, the upper part of the curved surface T-shaped nut is an outer spherical surface, and the outer spherical surface is tightly attached to an inner spherical surface below the curved surface T-shaped groove block 11 and can slide mutually; and a threaded hole connected with the stud 13 is formed in the center of the curved surface T-shaped nut 12.
Referring to fig. 3, the pressure plate 15 is disposed above the cylinder head 4 for pressing and fixing the cylinder head 4 from the upper end surface, and a through hole for passing the stud bolt 13 is formed in the center.
The stud 13 is inserted into an inner hole of the cylinder cover 4, the lower end of the stud is connected with the curved T-shaped nut 12, and the upper end of the stud passes through the pressure plate 15 and is tightly connected with the nut 16; the cylinder head 4 is pressed and fixed to the first and second buttresses 17 and 18 by the pressure plate 15.
Referring to fig. 6, as the nut 16 is tightened and the tightening force increases, the curved T-shaped nut 12 connected to the stud 13 slides and swings along the inner spherical surface of the curved T-shaped groove block 11, so that the axis of the stud 13 tilts by any angle within a range of ± 18 °, and the tilt angle thereof is automatically equal to the tilt angle of the inclined hole 3, so that the axis of the stud 13 automatically coincides with the axis of the inner hole of the cylinder head 4 and is perpendicular to the positioning surfaces of the first and second abutments 17 and 18, and the tightening force is automatically perpendicular to the end surface of the cylinder head 4, thereby ensuring the stability and reliability of locking the cylinder head 4. Therefore, the combined tool can be used for clamping the cylinder cover with the axis of the machined hole not parallel to the spindle of the machine tool.
The machining method of the inclined hole of the cylinder cover of the marine diesel engine using the combined tool comprises the following specific steps:
1) first, a first support 17 and a second support 18 are selected according to the bevel angle of the inclined hole 3 to be processed, namely, the first support 17 and the second support 18 can enable the axis of the inclined hole 3 of the cylinder cover 4 placed on the first support to be parallel to the axis of a spindle of the horizontal boring machine.
The height of 3 jacking devices 10 is reduced to the lowest by rotating the jacking rods, and then the jacking devices are respectively inserted into corresponding mounting holes on the bottom plate 9, wherein two jacking devices are arranged at the front part of the bottom plate 9, and one jacking device is arranged at the rear part.
The first backer 17 and the second backer 18 are respectively embedded in corresponding key slots on the bottom plate 9, and are fixedly connected with the bottom plate 9 through hexagon socket head cap screws and positioned with the bottom plate 9 through positioning pins.
Firstly, the curved surface T-shaped nut 12 is connected to the lower end of the stud 13, the stud 13 penetrates through a through hole in the center of the curved surface T-shaped groove block 11, then the curved surface T-shaped groove block 11 is fixed on the bottom plate 9 through an inner hexagonal screw and is positioned through a positioning pin, and therefore the curved surface T-shaped nut 12 is arranged below the curved surface T-shaped groove block 11 and above the bottom plate 9.
2) Mounting the bottom plate 9 assembled in the step 1) and the components on the bottom plate on the workbench; and lifting and placing the cylinder cover 4 on the first backer 17 and the second backer 18, and enabling the bottom of the cylinder cover 4 to be tightly attached to the positioning surfaces of the first backer 17 and the second backer 18, so that the axis of the inclined hole 3 is automatically in a horizontal position and is parallel to the axis of the main shaft of the horizontal boring machine.
3) The upper end of the stud 13 is inserted through a through hole in the center of the pressure plate 15 and connected with the nut 16, the nut 16 is screwed by using a pneumatic wrench, and the cylinder head 4 is pressed and fixed by the pressure plate 15; with the tightening and tightening force of the nut 16 increasing, the curved T-shaped nut 12 slides on the inner spherical surface of the curved T-shaped groove block 11, so that the stud 13 swings freely within a range of ± 18 °, the axis thereof automatically coincides with the axis of the inner hole of the cylinder head 4, and is perpendicular to the positioning surfaces of the first and second buttresses 17 and 18, so that the tightening force is automatically perpendicular to the end surface of the cylinder head 4, as shown in fig. 3 and 4.
4) And the horizontal boring machine processes the inclined hole 3, and after the processing is finished, preparation work for processing the next inclined hole of the cylinder cover 4 is started.
5) Loosening the nut 16 to disengage the pressure plate 15 from the cylinder head 4; the cylinder head 4 is lifted to the horizontal by rotating the lift rod of the lift device 10 at the rear part, and the lift rods of the lift devices 10 at the front and rear parts are synchronously rotated to horizontally lift the cylinder head 4 and separate from the positioning surfaces of the first and second buttresses 17 and 18, as shown in fig. 7.
6) And selecting a corresponding new first backer and a new second backer according to the bevel angle of another bevel hole to be processed, and replacing the original first backer 17 and the original second backer 18 with the new first backer and the new second backer.
7) Synchronously rotating the mandrils of the three jacking devices 10 to horizontally lower the cylinder cover 4, and after the lower part of the cylinder cover 4 contacts the two jacking devices 10 at the front part, independently lowering the jacking device 10 at the rear part until the lower part of the cylinder cover 4 is completely jointed with the new first backer and the new second backer, then screwing the nut 16 by using a pneumatic wrench, and tightly pressing and fixing the cylinder cover 4 by the pressure plate 15.
8) And processing the next inclined hole.
9) And 5) repeating the steps 5) to 8) until all the inclined holes are machined.
The combined tool is suitable for processing a plurality of inclined holes with different angles of the cylinder cover, and the combined tool can be used for tensioning a workpiece within the inclination range of +/-18 degrees; the jacking device realizes that the same cylinder cover gets on the vehicle once, and the jacking device jacks up the cylinder cover to replace the backer, so that the occupied workshop traveling is avoided.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, i.e., all equivalent changes and modifications made in accordance with the teachings of the present invention should be considered as within the technical scope of the present invention.
Claims (10)
1. The utility model provides a combination frock for marine diesel cylinder head inclined hole processing, installs on the workstation of horizontal boring machine, be equipped with the inclined hole that becomes an oblique angle with the level that needs processing on the cylinder head, its characterized in that, combination frock including:
the bottom plate is fixedly arranged on the workbench, and a key groove and a mounting hole are formed in the upper plane of the bottom plate;
the jacking device is inserted into the mounting hole of the bottom plate and used for jacking the cylinder cover;
the first and second buttresses are respectively embedded in the key grooves of the bottom plate and used for arranging and positioning the cylinder cover;
the curved surface T-shaped groove block is fixedly connected to the bottom plate;
the curved surface T-shaped nut is arranged below the curved surface T-shaped groove block and above the bottom plate and clings to the lower surface of the curved surface T-shaped groove block;
a pressure plate disposed above the cylinder head;
the double-end stud penetrates through an inner hole of the cylinder cover, the lower end of the double-end stud is connected with the curved surface T-shaped nut, the upper end of the double-end stud penetrates through the pressing plate and is tightly connected with the nut, and the cylinder cover is pressed and fixed and positioned on the first backrest and the second backrest through the pressing plate.
2. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 1, wherein the first backer and the second backer are provided with positioning surfaces, the positioning surfaces are tightly attached to the bottom of the cylinder cover, and the inclined hole in the cylinder cover is in a horizontal position and is parallel to the axis of the main shaft of the horizontal boring machine.
3. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 2, wherein the first and second buttresses determine the inclination angle of the positioning surface according to different inclination angles of the inclined hole to be machined.
4. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 1, wherein an inner spherical surface is arranged below the curved T-shaped groove block, a through hole for the stud to pass through is formed in the center of the curved T-shaped groove block, the curved T-shaped nut is in an inverted bowl shape, an outer spherical surface is arranged on the upper portion of the curved T-shaped groove block, the curved T-shaped nut and the inner spherical surface of the curved T-shaped groove block are tightly attached to each other and slide with each other, and a threaded hole for connecting the stud is formed in the center of the curved T-shaped nut.
5. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 4, wherein a curved T-shaped nut connected with the stud slides and swings along the inner spherical surface of the curved T-shaped groove block, so that the axis of the stud inclines within a range of +/-18 degrees, and the inclination angle of the stud is automatically equal to the inclination angle of the inclined hole.
6. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 1, wherein the first backer, the second backer and the arc-shaped T-shaped groove block are connected with the base plate through hexagon socket head cap screws and are positioned with the base plate through positioning pins.
7. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 1, wherein the jacking device comprises a jacking rod and a jacking rod sleeve, the jacking rod is connected to the upper part of the jacking rod sleeve through threads, and the height of the whole jacking device is adjusted through threaded rotation.
8. The combined tool for machining the inclined hole of the cylinder cover of the marine diesel engine according to claim 7, wherein the top of the ejector rod is spherical.
9. The machining method for the inclined hole of the cylinder cover of the marine diesel engine, which is realized by adopting the combined tool of claim 1, is characterized by comprising the following steps of:
1) selecting a corresponding first backer and a corresponding second backer according to the oblique angle of an oblique hole to be processed, lowering the jacking device to the minimum, inserting the jacking device into the mounting hole of the bottom plate, respectively embedding the first backer and the second backer into the key slot of the bottom plate, connecting the curved surface T-shaped nut to the lower end of the stud, enabling the stud to penetrate through the curved surface T-shaped slot block, and fixing the curved surface T-shaped slot block on the bottom plate through an inner hexagon screw;
2) mounting the bottom plate assembled in the step 1) and the components on the bottom plate on the workbench, lifting and placing the cylinder cover on the first backer and the second backer, enabling the cylinder cover to be tightly attached to the first backer and the second backer, and enabling the axis of the inclined hole to be automatically in a horizontal position and to be parallel to the axis of a main shaft of the horizontal boring machine;
3) the upper end of the stud penetrates through the pressing plate and is connected with the nut, and the nut is screwed to press and fix the cylinder cover through the pressing plate; along with the tightening of the nut and the increase of the tensioning force, the curved surface T-shaped nut slides in the curved surface T-shaped groove block, the axis of the stud automatically coincides with the axis of the inner hole of the cylinder cover, and the tensioning force is automatically perpendicular to the end face of the cylinder cover;
4) processing the inclined hole, and starting preparation work for processing an upper inclined hole and a lower inclined hole of the cylinder cover after the inclined hole is processed;
5) loosening the nut to disengage the pressure plate from the cylinder head, rotating the jacking device to jack the cylinder head up and out of engagement with the first and second abutments;
6) selecting a corresponding new first backer and a new second backer according to the bevel angle of another inclined hole to be processed, and replacing the original first backer and the original second backer with the new first backer and the new second backer;
7) rotating the jacking device to enable the cylinder cover to descend until the lower portion of the cylinder cover is completely attached to the new first backer and the new second backer, and then screwing the nut and tightly pressing and fixing the cylinder cover through the pressing plate;
8) processing the next inclined hole;
9) and 5) repeating the steps 5) to 8) until all the inclined holes are machined.
10. The method for machining the inclined hole of the cylinder head of the marine diesel engine according to claim 9, wherein in the step 3), the stud swings within a range of +/-18 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663981.8A CN113579290A (en) | 2021-06-16 | 2021-06-16 | Combined tool and method for machining inclined hole of cylinder cover of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110663981.8A CN113579290A (en) | 2021-06-16 | 2021-06-16 | Combined tool and method for machining inclined hole of cylinder cover of marine diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113579290A true CN113579290A (en) | 2021-11-02 |
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| CN202110663981.8A Pending CN113579290A (en) | 2021-06-16 | 2021-06-16 | Combined tool and method for machining inclined hole of cylinder cover of marine diesel engine |
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Cited By (1)
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| CN115070455A (en) * | 2022-08-05 | 2022-09-20 | 中达电机股份有限公司 | Drilling jig for motor end cover and drilling process |
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