CN117245114A - Device and method for machining precise coaxial holes in narrow space - Google Patents
Device and method for machining precise coaxial holes in narrow space Download PDFInfo
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- CN117245114A CN117245114A CN202310792236.2A CN202310792236A CN117245114A CN 117245114 A CN117245114 A CN 117245114A CN 202310792236 A CN202310792236 A CN 202310792236A CN 117245114 A CN117245114 A CN 117245114A
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- 238000003754 machining Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010892 electric spark Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920001342 Bakelite® Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/16—Drilling machines with a plurality of working-spindles; Drilling automatons
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
Abstract
The invention relates to a device and a method for machining a precise coaxial hole in a narrow space, comprising a servo motor (2), a speed reducer (3), a coupler (4), a bevel gear pair (5) and a cutting system (6), wherein the servo motor (2), the speed reducer (3), the coupler (4), the bevel gear pair (5) and the cutting system (6) are sequentially connected together; the servo motor (2), the speed reducer (3), the coupler (4), the bevel gear pair (5) and the cutting system (6) are fixedly arranged on the movable flat plate (10); the device can replace a numerical control machine tool, saves equipment acquisition cost, and reduces processing cost.
Description
Technical Field
The invention relates to a method and a device for machining a precise coaxial hole in a narrow space, in particular to a device for machining a high-precision coaxial through hole and a coaxial blind hole by utilizing the device for machining the high-precision coaxial through hole and the coaxial blind hole, and belongs to the field of machining.
Background
With the continuous miniaturization of high-precision products, the machining of narrow-space hole systems is frequently encountered in the prior machining, and the hole systems are usually positioned on two sides symmetrically and are blind holes, so that the machining space on two sides is limited. At present, three methods for machining holes are commonly used, namely, machining by using a lengthened cutter, machining by using an angle elbow and electric spark machining.
The lengthened cutter is suitable for machining coaxial through holes, and for the hole system with higher coaxiality requirement, one-time machining from one side is required to be carried out by using the lengthened cutter, but the machining is limited in that the machining of blind hole characteristics with limited two sides cannot be finished. The angle elbow can realize coaxial through hole and blind hole processing, but to narrow and small space, angle elbow processingequipment has two limitations: firstly, the space is narrow, the angle elbow can interfere with a workpiece, and the angle elbow and the workpiece collide during processing; secondly, the smaller the space is, the smaller the appearance of the angle elbow is, and the lower the rigidity of the angle elbow is. Therefore, the blind holes in the narrow space of the difficult-to-process material cannot be processed by the two methods. The electric spark is corroded by the special and small electrode, so that the coaxial through hole and the blind hole in a narrow space can be machined, and the electric spark has the defects of low machining efficiency, and particularly for blind hole machining, carbon deposition is easy to generate because the electric corrosion material cannot be discharged in time, and the carbon deposition needs to be cleaned manually frequently, so that the deeper the hole is, the longer the machining time is, the electrode consumption is fast, and the machining cost is high.
Therefore, it is necessary to design a high-precision and high-efficiency coaxial hole machining device, design a machining device and a symmetrical cutter aiming at the limited positions on two sides, and innovate a coaxial hole machining process method so as to realize low-cost and high-efficiency machining of coaxial holes in a narrow space.
Disclosure of Invention
The invention provides a device and a method for processing a high-precision coaxial through hole and a blind hole, which are used for solving the problems of difficult processing and high processing cost of the precision coaxial hole in a narrow space of a difficult-to-process material.
The utility model provides a accurate coaxial hole processingequipment in narrow and small space, includes servo motor 2, reduction gear 3, shaft coupling 4, bevel gear pair 5 and cutting system 6, wherein servo motor 2, reduction gear 3, shaft coupling 4, bevel gear pair 5 and cutting system 6 link together in proper order, and its characterized in that, stretch to the slide rail 11 of fore-and-aft direction on fixed mounting on base plate 1, the removal flat board 10 is installed on slide rail 11, and removal flat board 10 can be at slide rail 11 back-and-forth movement; the servo motor 2, the speed reducer 3, the coupler 4, the bevel gear pair 5 and the cutting system 6 are fixedly arranged on the movable flat plate 10; a sliding system 9 is further arranged on the base plate 1 behind the sliding rail 11, and the sliding rail 11 in the direction along which the sliding platform 91 on the sliding system 9 slides is vertical;
the clamping device is arranged on the sliding platform 91 and comprises a zero point quick-change tool 7 and a fixing tool 23, wherein the fixing tool 23 is a U-shaped plate, a gap in the middle is a position of the cutting system 6 when in work, the zero point quick-change tool 7 is fixed on the sliding platform 91 through screws, a plurality of mounting holes are formed in the upper surface of the zero point quick-change tool 7, corresponding mounting columns are formed in the lower surface of the fixing tool 23 and used for being inserted into the plurality of mounting holes formed in the upper surface of the zero point quick-change tool 7, and the fixing tool 23 is fixedly connected with the zero point quick-change tool 7 through blind nails and used for quick clamping and positioning of workpieces;
during operation, the workpiece 25 to be processed is firstly fixed on the fixed tooling 23, then the fixed tooling 23 is connected with the zero point quick-change tooling 7, the sliding platform 91 is moved, so that the center line of the zero point quick-change tooling 7 vertical to the sliding platform 91 coincides with the center line between the two rails of the sliding rail 11, namely the zero point quick-change tooling 7 is at the zero point position; the moving flat plate 10 is moved close to the sliding platform 91, so that the cutting system 6 enters the notch of the fixed tool 23 for processing the U-shaped workpiece 25 to be processed on the fixed tool 23.
The fixed tooling 23 is a U-shaped plate, at least four L-shaped pressing plates 22 are arranged on the fixed tooling 23, a screw 26 is arranged on each pressing plate 22, and when the fixed tooling 23 is used, the workpiece 25 to be processed is positioned on the fixed tooling 23 by using two threaded positioning pins 24, four corners of the workpiece 25 to be processed are pressed by the pressing plates 22, and the four screws 26 respectively penetrate through the four pressing plates 22 to press the workpiece 25 to be processed and are fixed on the fixed tooling 23.
A method for machining a small-space precision coaxial hole by using the small-space precision coaxial hole machining device according to claim 1, comprising the steps of,
step one, clamping a workpiece 25 to be processed on a fixed tool 23, fixing the fixed tool 23 on a zero point quick change tool 7, and adjusting the zero point quick change tool 7 to be at a zero point position; two roughing tools, drills, are mounted on the rotating spindle of the cutting system 6;
step two, the sliding platform 91 is positioned, so that the zero point quick change tool 7 is translated to a certain fixed position from the zero point, the cutters at two sides of the cutting system 6 can enter a narrow space of a notch of the zero point quick change tool 7, and interference between the cutters and a workpiece during machining is avoided;
step three, moving a cutter to a notch of a workpiece 25 to be processed by rotating the hand wheel 12, and adjusting the position of the cutting system 6 to enable the center of the cutter on the cutting system 6 to coincide with the center line of a hole set by the workpiece 25 to be processed;
step four, calculating the distance of the movement displacement of the sliding platform 91 according to the cutting depth of the cutters at the two sides, starting the cutting system 6, starting to roughing one side hole, and reversely moving the sliding platform 91 after finishing the machining, and roughing the other side hole;
step five, rotating the hand wheel 12, removing the cutting system 6, replacing a semi-finishing tool or a finishing tool, repeating the step three and the step four, and performing semi-finishing and finishing on the hole;
and step six, finishing the finish machining, wherein the workpiece 25 to be machined is machined.
The invention has the beneficial effects that: the invention designs a high-precision coaxial hole low-cost and high-efficiency processing method and device for a difficult-to-process material in a narrow space, which are characterized in that two cutters are clamped at one time, the cutters only do rotary cutting movement, and a workpiece does horizontal reciprocating movement, so that the processing of high-precision coaxial blind straight holes and blind taper holes with different diameters is realized, the quick clamping and positioning of the workpiece is realized through quick zero-point replacement of the tools, and the quick replacement and clamping of the cutters are realized by using jackscrews and steel balls.
Aiming at the characteristics of the parts, the original machining method has the problems that the long tool machining method can only machine the through hole characteristics of the parts of the type, the requirements of the elbow matched with the tool machining method for avoiding interference machining areas are larger, the efficiency of the electric spark machining method is lower, and the like. The device can finish the processing of coaxial blind holes on two sides, solves the problem that the processing area is narrow and limited, and improves the processing efficiency.
The device can replace a numerical control machine tool, saves equipment acquisition cost, and reduces processing cost. The device can be matched with an industrial robot to form an automatic processing unit, so that continuous automatic processing of workpieces is realized.
Drawings
FIG. 1, a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of the cutting system 6 of the present invention;
FIG. 3 is a cross-sectional view of the cutting system 6 of the present invention;
FIG. 4 is a schematic view of a tool clamping of the cutting system 6 of the present invention;
FIG. 5 is a schematic view of the structure of a workpiece 25 to be processed;
fig. 6 is a cross-sectional view of the workpiece 25 to be processed;
fig. 7 is a schematic diagram of clamping a workpiece 25 to be processed on a fixed tool 23;
FIG. 8 is a schematic view of the process of the present invention.
In the figure, a base plate 1, a servo motor 2, a speed reducer 3, a coupler 4, a bevel gear pair 5, a cutting system 6, a zero point quick-change tool 7, a chip baffle 8, a sliding system 9, a moving plate 10, a sliding rail 11, a hand wheel 12, a cutter I13, a jackscrew 14, a mandrel 15, a bracket 16, a bearing 17, a backup nut 18, a positioning column II 19, a positioning column I20, a cutter II 21, a pressing plate 22, a fixed tool 23, a threaded positioning pin 24, a workpiece to be processed 25 and a screw 26 are adopted.
The workpiece 25 to be machined has two sets of blind hole structural features including a set of phia cylindrical blind holes and a set of phib tapered blind holes, particularly in the three-dimensional schematic of fig. 5 and the cross-sectional view of the workpiece to be machined of fig. 6.
Detailed Description
A high-precision coaxial through hole and blind hole machining device comprises a power system, a transmission system, a cutting system, a sliding system, a clamping system and a servo control system.
The technical scheme of the device for processing the coaxial holes of difficult-to-process materials in a narrow space with high precision is as follows: a square base plate is used for supporting the whole processing system and the processed workpiece.
The power system comprises a servo motor and a speed reducer, which are connected through a coupler.
The transmission system comprises two bevel gears made of bakelite materials and a protective cover, and the speed reducer is connected with the bevel gears through keys and transmits power to the bevel gears. The bakelite material can greatly relieve vibration when gears are meshed, so that the buffer is increased, the noise is reduced, the meshing performance of the bevel gears is good, the contact ratio is large, the transmission is stable, the size is small, and the transmission performance is greatly superior to that of straight-tooth gears.
The cutting system comprises a rotating mandrel, two tapered roller bearings, two cutting tools, a backup nut, a protective cover and a metal chip collecting plate, one end of the rotating mandrel is clamped at the inner ring of the tapered roller bearing, the other end of the rotating mandrel is provided with a section of external screw thread, the backup nut is tightly clamped at the inner ring of the tapered roller bearing at the other side, three L-shaped through holes are respectively arranged at two sides of the rotating mandrel, a positioning column is arranged in the tapered roller bearing, an internal screw thread is arranged near the outer through holes, a jackscrew can be screwed, three ball sockets are also arranged on a tool handle, the jackscrew pushes the positioning column to the ball socket of the tool handle through screwing, axial and radial positioning of the tool is realized, the rotating mandrel is in interference fit with the tapered roller bearing, and the tapered roller bearing has good centripetal force and axial bearing force, so that radial runout of the tool is ensured to be not more than 0.005mm. Two cutters can be clamped simultaneously by one rotating mandrel, so that high-precision coaxial holes can be machined in place by one-time clamping, and higher coaxiality is ensured. Below the cutting tool is a baffle plate for collecting metal chips, which can collect the chips intensively.
The power system, the transmission system and the cutting system are respectively fixed on the same movable flat plate through brackets, scale marks are carved on two side surfaces of the movable flat plate, two sliding rails are arranged below the movable flat plate, the movable flat plate can precisely move along the Y direction through a hand wheel, and the flat plate is fixed on the square substrate through a threaded pin.
The sliding system comprises a servo motor and a sliding platform, the servo motor drives a screw rod to rotate, so that the sliding platform is driven to precisely move along the X direction, the repeated positioning precision is not more than 0.005mm, the sliding system is fixed on a square base plate through a threaded pin, and the flat Y direction and the X direction of the sliding platform are ensured to form 90 degrees.
The clamping system comprises a zero quick-change tool and a workpiece fixing tool, wherein the zero quick-change tool is fixed on the sliding platform through screws, the workpiece fixing tool is used for clamping a workpiece and is connected with the zero quick-change tool through two blind bolts, so that quick clamping and positioning of the workpiece are realized, and the occupied time of a processing device is reduced. The hole to be machined of the workpiece is consistent with the center height of the cutter.
The servo control system is a closed-loop control system and comprises a control panel and a controller, wherein the control panel can display and control the rotating speed and the forward and reverse rotation of the cutter as well as the moving speed and the moving direction of the sliding platform. The controller is used for controlling the servo motors of the power system and the sliding system, controlling the rotating speed of the cutter and the moving speed of the workpiece through controlling the motors, and only performing rotary cutting motion on the cutter during machining, and performing horizontal axial motion on the workpiece, so that machining of different straight through holes, through taper holes, blind straight holes and blind taper holes is completed through reasonable machining parameters.
The invention relates to a method for processing a coaxial hole of a difficult-to-process material in a narrow space with high precision at low cost and high efficiency, which specifically comprises the following steps:
firstly, placing a clamped workpiece on a zero point quick-change tool, and mounting two rough machining cutters, namely drill bits, on a rotating mandrel of a cutting system;
secondly, translating the position of the sliding platform from a zero point to a certain fixed position, ensuring that cutters at two sides can enter a narrow space, and avoiding interference between the cutters and a workpiece during processing;
thirdly, moving the cutter to a hole to be machined by rotating a hand wheel, and ensuring that the center of the cutter coincides with the center of the hole;
step four, respectively calculating the cutting depth of the cutters at the two sides, namely, the reciprocating displacement of the sliding platform, starting the processing device, starting to roughing one side hole, and reversely moving the sliding platform after finishing the processing, and roughing the other side hole;
fifthly, rotating a hand wheel, removing the cutter, replacing a semi-finishing cutter or a finishing cutter-milling cutter or a forming cutter by loosening a jackscrew, repeating the fourth step, and performing semi-finishing or finishing on the hole;
and sixthly, machining other coaxial hole systems after finishing finish machining, or replacing the workpiece for performing second piece machining.
Examples:
in order to make the technical means, the method process, the achievement of the purpose and the effect achieved by the present invention easy to understand, the present invention is further described below in connection with the specific workpiece processing. The workpiece material is TC4 titanium alloy, the holes to be processed are two groups of coaxial holes, the upper end hole is two coaxial straight holes, the phi A size is phi 15 (-0.005, +0.02) mm, the coaxiality requirement is phi 0.01mm, the lower end hole is two coaxial cone blind holes, the phi B size is phi 12 (0, +0.02) mm, the coaxiality requirement is phi 0.01mm, the coaxial holes are the center distance of 20+/-0.05 mm, the parallelism phi of the two groups of coaxial holes is 0.01, the center distance of the coaxial straight holes is 45mm from the upper end of the door-shaped frame, and the span of the door-shaped frame is 100+/-0.1 mm, as shown in figures 5 and 6.
The processing process is as follows:
in the first step, two threaded positioning pins 24 are used for positioning a workpiece 25 to be processed on the fixed tool 23, four screws 26 respectively penetrate through the four pressing plates 22 and are pressed and fixed on the fixed tool 23, as shown in fig. 7. On the zero point quick change tooling 7, the repeated positioning accuracy of the zero point quick change tooling is 0.003mm.
In the cutting system 6, in order to ensure that the center line of a hole is parallel to the center lines of a cutter I13 and a cutter II 14, one end of a positioning column I20 and one end of a positioning column II 19 are inclined planes with consistent angles, the other end of the positioning column I20 is a hemispherical surface, the inclined planes of the positioning column I and the positioning column II are attached through 6M 6 jackscrews, and the hemispherical surfaces of the 6 positioning columns II are in contact with ball sockets on a cutter handle through screwing the jackscrews, so that two cutters phi 14mm drill bits for roughly machining straight holes at the upper end are arranged on a rotating mandrel of the cutting system 6;
secondly, translating the zero quick-change tool 7 on the sliding platform from a zero point to a certain fixed position, ensuring that the cutters at two sides can enter a narrow space, and avoiding interference between the cutters and a workpiece during processing;
in fig. 8, the hand wheel 12 is rotated to drive the movable flat plate 10 to linearly move forward, and meanwhile, the cutters I13 and II 21 in the cutting system 6 are driven to move to the blind hole feature of the workpiece 25 to be processed at the upper end, so that the center line of the cutters is ensured to coincide with the center line of the symmetrical blind hole feature;
fourthly, the distance between the tool tips at the two ends is 90mm, the distance between the tool tips at the two ends and the single side at two sides of a narrow space is 5mm ((100-90)/2=5), the cutting depth of the left side tool is 17mm, the cutting depth of the right side tool is 17mm, a machining device is started, the rotating speed of the tool is set to 600r/min, the moving speed of a sliding platform is set to 20mm/min, the right side straight hole rough machining is realized by moving 17mm rightwards, the left side straight hole rough machining is realized by moving 34mm (17+17=34), and a reciprocating pecking mode is adopted in the machining process so as to break scraps and clear accumulated scraps;
the workpiece 25 to be processed is mounted on the zero point quick change tooling 7, the zero point quick change tooling 7 is mounted right above the zero point quick change tooling 7, in fig. 8, the processing sliding system 9 is a kinematic pair, the workpiece 25 to be processed is driven to transversely reciprocate through the mounting connection relation, and the feed amount of each time of left and right reciprocation is increased by 0.1mm. The cutting system 6 does not move in the front-back direction, the cutter I13 and the cutter II 21 do circular motion, and the machining is completed through the left-right reciprocating motion of the part 25 to be machined.
And fifthly, reversely rotating the hand wheel 12 to drive the movable flat plate 10 to linearly move backward, removing the cutter I13 and the cutter II 21, replacing the finishing cutter phi 15mm boring cutter by loosening the jackscrew 14, and repeating the fourth step to finish the upper end hole. The rotating speed of the cutter is set to 300r/min, and the moving speed of the sliding platform is set to 10mm/min;
sixthly, rotating the hand wheel 12, removing the cutter I13 and the cutter II 21, and replacing a cutter for machining the blind hole of the lower end cone, namely a drill bit with phi 7mm, by loosening the jackscrew 14;
seventh, repeating the second, third and fourth steps;
and eighth step, reversely rotating the hand wheel 12, removing the cutter I13 and the cutter II 21, replacing a semi-finishing cutter-a phi 9mm milling cutter by loosening the jackscrew 14, repeating the fourth step, and semi-finishing the lower end hole. The rotating speed of the cutter is set to 300r/min, and the moving speed of the sliding platform is set to 10mm/min;
and ninth, rotating the hand wheel 12, removing the cutter I13 and the cutter II 21, replacing a finishing cutter, namely a formed milling cutter, by loosening the jackscrew 14, repeating the fourth step, finishing the lower end hole, wherein the rotating speed of the cutter is set to 300r/min, and the moving speed of the sliding platform is set to 10mm/min. Thus, the whole hole system processing of the workpiece is completed.
And tenth, after the blind hole characteristics of the part 25 to be machined are completely machined, the hand wheel 12 is reversely rotated, and the cutting system 6 is linearly moved backwards and away from the machining area. And taking down the zero point quick-change tool 7, loosening the four pressing plates 22, taking down the machined workpiece, and finishing one-time machining. If a plurality of workpieces are processed again, repeating the steps.
While the principal features, embodiments and advantages of the present invention have been described in detail, it should be noted that those skilled in the art may make various modifications and changes based on the technical principles of the present invention, and such modifications and changes should also be considered as the scope of the present invention.
Claims (3)
1. The utility model provides a accurate coaxial hole processingequipment in narrow and small space, including servo motor (2), reduction gear (3), shaft coupling (4), helical gear pair (5) and cutting system (6), wherein, servo motor (2), reduction gear (3), shaft coupling (4), helical gear pair (5) and cutting system (6) link together in proper order, its characterized in that, stretch to fixed mounting on base plate (1) on slide rail (11) of fore-and-aft direction, remove dull and stereotyped (10) and install on slide rail (11), remove dull and stereotyped (10) and can be at slide rail (11) fore-and-aft movement; the servo motor (2), the speed reducer (3), the coupler (4), the bevel gear pair (5) and the cutting system (6) are fixedly arranged on the movable flat plate (10); a sliding system (9) is further arranged on the substrate (1) behind the sliding rail (11), and the sliding rail (11) in the direction in which the sliding platform (91) on the sliding system (9) slides is vertical;
the clamping device is arranged on the sliding platform (91), and comprises a zero point quick-change tool (7) and a fixing tool (23), wherein the fixing tool (23) is a U-shaped plate, a gap in the middle is a position of the cutting system (6) during working, the zero point quick-change tool (7) is fixed on the sliding platform (91) through screws, a plurality of mounting holes are formed in the upper surface of the zero point quick-change tool (7), corresponding mounting columns are formed in the lower surface of the fixing tool (23) and used for being inserted into the plurality of mounting holes in the upper surface of the zero point quick-change tool (7), and the fixing tool (23) is fixedly connected with the zero point quick-change tool (7) through blind nails and used for quick clamping and positioning of workpieces;
during operation, a workpiece (25) to be processed is firstly fixed on a fixed tool (23), then the fixed tool (23) is connected with a zero point quick-change tool (7), a sliding platform (91) is moved, so that the center line of the zero point quick-change tool (7) perpendicular to the sliding platform (91) coincides with the center line between two rails of a sliding rail (11), namely, the zero point quick-change tool (7) is at the zero point; and then the movable flat plate (10) is moved to be close to the sliding platform (91), so that the cutting system (6) enters a notch of the fixed tool (23) and is used for machining the U-shaped workpiece (25) to be machined on the fixed tool (23).
2. The precise coaxial hole machining device in a narrow space according to claim 1, wherein the fixing tool (23) is a U-shaped plate, at least four L-shaped pressing plates (22) are arranged on the fixing tool (23), one screw (26) is arranged on each pressing plate (22), during operation, two threaded locating pins (24) are firstly used for locating a workpiece (25) to be machined on the fixing tool (23), four corners of the workpiece (25) to be machined are pressed by the pressing plates (22), and the four screws (26) respectively penetrate through the four pressing plates (22) to press the workpiece (25) to be machined and are fixed on the fixing tool (23).
3. A method for machining a small-space precision coaxial hole by using the small-space precision coaxial hole machining device according to claim 1, comprising the steps of,
clamping a workpiece (25) to be processed on a fixed tool (23), fixing the fixed tool (23) on a zero point quick-change tool (7), and adjusting the zero point quick-change tool (7) to be at a zero point position; two rough machining cutters, namely drill bits, are arranged on a rotating mandrel of a cutting system (6);
step two, translating the sliding platform (91) to a certain fixed position from the zero point by the zero point quick-change tool (7), ensuring that cutters at two sides of the cutting system (6) can enter a narrow space of a notch of the zero point quick-change tool (7), and avoiding interference between the cutters and a workpiece during processing;
step three, moving a cutter to a notch of a workpiece (25) to be processed by rotating a hand wheel (12), and adjusting the position of a cutting system (6) to enable the center of the cutter on the cutting system (6) to coincide with the center line of a hole set by the workpiece (25) to be processed;
step four, calculating the moving displacement distance of the sliding platform (91) according to the cutting depth of the cutters at the two sides respectively, starting the cutting system (6), starting to roughing one side hole, and reversely moving the sliding platform (91) after finishing the machining, and roughing the other side hole;
step five, rotating a hand wheel (12), removing the cutting system (6), replacing a semi-finishing cutter or a finishing cutter, repeating the step three and the step four, and performing semi-finishing and finishing on the hole;
and step six, finishing the finish machining, wherein the workpiece (25) to be machined is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310792236.2A CN117245114A (en) | 2023-06-30 | 2023-06-30 | Device and method for machining precise coaxial holes in narrow space |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310792236.2A CN117245114A (en) | 2023-06-30 | 2023-06-30 | Device and method for machining precise coaxial holes in narrow space |
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| CN117245114A true CN117245114A (en) | 2023-12-19 |
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| CN202310792236.2A Pending CN117245114A (en) | 2023-06-30 | 2023-06-30 | Device and method for machining precise coaxial holes in narrow space |
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|---|---|---|---|---|
| EP0452673A2 (en) * | 1990-03-22 | 1991-10-23 | Detlef Pandel | Clamping device for the production of mitre corner joints of wooden window frames |
| US5205682A (en) * | 1991-04-12 | 1993-04-27 | Cooper Industries, Inc. | Adjustable dual bit drilling machine |
| CN105636726A (en) * | 2013-10-18 | 2016-06-01 | 日本特殊陶业株式会社 | Cutting tool holder and cutting tool |
| CN207770853U (en) * | 2018-01-15 | 2018-08-28 | 南通钜盛数控机床有限公司 | A kind of big spacing coaxial aperture machining tool |
| CN112355591A (en) * | 2020-10-29 | 2021-02-12 | 哈尔滨中天数控工具有限责任公司 | Boring cutter for machining valve seat ring and guide pipe hole and machining method of boring cutter |
| CN113245884A (en) * | 2021-02-09 | 2021-08-13 | 北京卫星制造厂有限公司 | Quick reloading system and method based on zero point positioning |
| CN114161100A (en) * | 2022-01-12 | 2022-03-11 | 青岛迈特园林机械零部件有限公司 | Crank processing system and processing method |
-
2023
- 2023-06-30 CN CN202310792236.2A patent/CN117245114A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452673A2 (en) * | 1990-03-22 | 1991-10-23 | Detlef Pandel | Clamping device for the production of mitre corner joints of wooden window frames |
| US5205682A (en) * | 1991-04-12 | 1993-04-27 | Cooper Industries, Inc. | Adjustable dual bit drilling machine |
| CN105636726A (en) * | 2013-10-18 | 2016-06-01 | 日本特殊陶业株式会社 | Cutting tool holder and cutting tool |
| CN207770853U (en) * | 2018-01-15 | 2018-08-28 | 南通钜盛数控机床有限公司 | A kind of big spacing coaxial aperture machining tool |
| CN112355591A (en) * | 2020-10-29 | 2021-02-12 | 哈尔滨中天数控工具有限责任公司 | Boring cutter for machining valve seat ring and guide pipe hole and machining method of boring cutter |
| CN113245884A (en) * | 2021-02-09 | 2021-08-13 | 北京卫星制造厂有限公司 | Quick reloading system and method based on zero point positioning |
| CN114161100A (en) * | 2022-01-12 | 2022-03-11 | 青岛迈特园林机械零部件有限公司 | Crank processing system and processing method |
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