CN114226818A - Reverse hole milling tool for processing blind end step hole - Google Patents
Reverse hole milling tool for processing blind end step hole Download PDFInfo
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- CN114226818A CN114226818A CN202210061561.7A CN202210061561A CN114226818A CN 114226818 A CN114226818 A CN 114226818A CN 202210061561 A CN202210061561 A CN 202210061561A CN 114226818 A CN114226818 A CN 114226818A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention provides a reverse hole milling tool for processing a blind-end step hole, which comprises a gun body, wherein the front end of the gun body is provided with a cutter assembly for processing the blind-end step hole and an adjusting assembly for controlling the working state of the cutter assembly, and the adjusting assembly is sleeved on the cutter assembly; the gun body is internally provided with a first cavity and a second cavity, the first cavity is positioned at the front end of the second cavity, a rotating assembly used for driving the cutter assembly to rotate is installed in the first cavity, and a driving assembly used for driving the rotating assembly to move back and forth is installed in the second cavity. According to the reverse hole milling tool for processing the blind-end stepped hole, the gun body and the cutter arranged at the front end of the gun body are arranged, so that the blind-end stepped hole can be processed and manufactured, the processing depth of the processed blind-end stepped hole is accurately controlled, the processing precision is high, the processing rejection rate is low, and the processing requirements of batch assembly production can be met.
Description
Technical Field
The invention belongs to the technical field of fastener assembly, and particularly relates to a reverse hole milling tool for machining a blind end stepped hole.
Background
In the fields of aerospace, navigation and the like, different parts have different requirements on connecting pairs, some connecting pairs have high tensile property, some parts have high fatigue resistance, some parts have excellent sealing property and the like, the connecting pairs with different performance requirements have strict special requirements on fasteners, and have higher requirements on the structural form and precision of connecting holes, and the performance of the connecting pairs can meet the optimal design requirement only when the mounting holes and the fasteners reach the optimal matching form.
In the fields of aerospace and navigation equipment assembly and the like, certain connecting parts are totally closed regions or non-open parts, and a fastener is required to be installed on a blind end single side; in recent years, with the design development of models, certain newly designed blind end mounting fasteners must be matched with blind end stepped holes for mounting to achieve the optimal mounting effect, the fasteners have accurate requirements on the thickness of an interlayer of the finally processed blind end stepped holes, the processed interlayer of the stepped holes has the defects of unreliable connection or connection failure of the blind end mounting fasteners due to the fact that the thickness of the interlayer is thin or thick, the processing of the blind end stepped holes is always extremely difficult, the rejection rate is high, and the whole part is easily scrapped;
at present, the aerospace fine worker has designed a combination formula instrument that can be used to blind end step hole processing usefulness, use this instrument can realize the manufacturing of blind end step hole, but the blind end step hole's that this cutter can't accurate control processing out depth of processing, can only process out the blind end step hole that requires not high to the step hole depth, and add the processing several back of every time little feed volume, measure after withdrawing the sword again, can only adopt the mode that little step iteration approaches to process, it is time-consuming and laborious, and there is the extravagant risk that leads to whole part scrapping of depth of processing, it is extremely high to operation workman's skill level requirement, can't satisfy the big processing demand of assembly line when model equipment mass assembly production.
Disclosure of Invention
In view of the above, the present invention is directed to a reverse hole milling tool for processing a blind-end stepped hole, so as to solve the problems of low precision of the processing tool, time and labor waste of operators, and high rejection rate.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a reverse hole milling tool for processing a blind end step hole comprises a gun body, wherein a cutter assembly for processing the blind end step hole and an adjusting assembly for controlling the working state of the cutter assembly are arranged at the front end of the gun body, and the adjusting assembly is sleeved on the cutter assembly;
the gun body is internally provided with a first cavity and a second cavity, the first cavity is positioned at the front end of the second cavity, a rotating assembly used for driving the cutter assembly to rotate is installed in the first cavity, and a driving assembly used for driving the rotating assembly to move back and forth is installed in the second cavity.
Further, the cutter assembly comprises a cutter bar, the connecting end of the cutter bar is fixedly connected with the front end of the gun body, the working end of the cutter bar is provided with an accommodating groove, a cutter is arranged in the accommodating groove, and an elastic mechanism for controlling the action of the cutter is arranged in the accommodating groove;
a sleeve is sleeved on the outer side of the cutter bar, a notch corresponding to the accommodating groove is formed in the sleeve, the notch is of an L-shaped structure, the cutting end of the cutter rotates to the outside of the notch to process a step hole at the blind end, and the end part of the gun case, close to the gun body, is of a tooth-shaped structure;
a threaded hole is formed in the end head of the cutter bar, a plug is connected in the threaded hole in a threaded mode, the longitudinal section of the plug is of a T-shaped structure, a first spring is fixedly arranged at one end, close to the sleeve, of the plug, and the other end of the first spring is fixedly connected with the sleeve.
Furthermore, a straight groove connected with the front end of the gun body is arranged at the end part of the connecting end of the cutter bar, and a plurality of annular grooves for preventing the cutter from axially moving in the cutting process are uniformly arranged at the connecting end of the cutter bar;
install the rotation axis in the holding tank of cutter arbor, the cutter is installed on the rotation axis, still fixedly in the holding tank of cutter arbor is provided with the fixed pin, and elastic mechanism installs on the fixed pin.
Further, the bottom end of the cutter is of an arc-shaped structure, the top end of the cutter is obliquely arranged, the bottom end of the cutter is also provided with a groove, and a claw is fixedly arranged in the groove;
the elastic mechanism comprises a second spring, one end of the second spring is mounted on the fixing pin, the other end of the second spring is fixedly connected with a rubber ring, and one end of the rubber ring is fixedly connected with the hook claw.
Furthermore, the adjusting assembly comprises a rotary loop bar, a gun sleeve and a positioning sleeve, the rotary loop bar is sleeved on the cutter bar, the outer diameter of the rotary loop bar is equal to that of the sleeve, the front end part of the rotary loop bar is of a tooth-shaped structure and is meshed with the tooth-shaped structure arranged at the end part of the sleeve, and the outer wall of the rotary loop bar is in threaded connection with a switching handle;
the gun sleeve is sleeved on the rotary loop bar, one end of the gun sleeve is in threaded connection with the front end of the gun body, a U-shaped groove is formed in the gun sleeve, and the switching handle is located in the U-shaped groove;
an auxiliary support for assisting an operator to hold the gun body is also fixedly arranged on the outer wall of the gun case;
the locating sleeve is provided with an internal thread, the locating sleeve is in threaded connection with the other end of the gun sleeve, and the inner diameter of the locating sleeve is larger than the outer diameter of the sleeve.
Further, the gun body comprises an engineering base body, a gun head is mounted at the front end of the engineering base body, internal threads are formed in the gun head, and the gun head is in threaded connection with the tail end of the gun sleeve;
a cavity is arranged in the engineering base body, the first accommodating cavity and the second accommodating cavity are both arranged in the cavity of the engineering base body, and the first accommodating cavity is communicated with the gun head at the front end and is also communicated with the second accommodating cavity at the rear end;
the tail end of the engineering base body is also provided with a measuring unit for setting the feeding depth of the cutter;
the bottom of the engineering base body is also fixedly provided with a handheld part for an operator to hold the gun body.
Further, the rotating assembly comprises a horizontal sliding power box, the horizontal sliding power box is installed in the accommodating cavity I, a through cavity is formed in the horizontal sliding power box, a driving main shaft is installed in the cavity, and a first bearing and a second plane bearing are assembled between the driving main shaft and the inner wall of the horizontal sliding power box;
a rotary driven gear is mounted on the driving main shaft, a driving motor is further arranged in the cavity of the horizontal sliding power box, a rotary driving gear is fixedly arranged at an output shaft end of the driving motor, and the rotary driving gear is meshed with the rotary driven gear;
the end part of one end of the driving main shaft extends into the gun head and is fixedly connected with the cutter bar, the end part of the driving main shaft is further provided with a chuck locking sleeve for locking and fixing the cutter bar and the driving main shaft, the end part of the other end of the driving main shaft extends to the second accommodating cavity and is fixedly provided with a limiting table, a third spring is further sleeved on the driving main shaft positioned between the limiting table and the second accommodating cavity and is fixedly connected with the side wall of the limiting table, a third plane bearing is fixedly connected with the other end of the third spring and is arranged on the driving main shaft, and the third plane bearing is fixedly connected with the inner wall of the second accommodating cavity.
Furthermore, the driving assembly comprises a guide rail shaft fixedly arranged on the inner wall of the second accommodating cavity, a pushing and pressing rack sliding table is arranged on the guide rail shaft in a sliding mode, a meshing part is arranged at the bottom end of the pushing and pressing rack sliding table, and a protruding part used for pushing the limiting table is arranged at the top end of the pushing and pressing rack sliding table;
a pushing rack motor is arranged in the accommodating cavity II, a gear is mounted at the output shaft end of the pushing rack motor, and the gear is meshed with the meshing part of the pushing rack sliding table;
and a threading groove for connecting the pushing rack motor with external equipment is formed in the engineering base body.
Furthermore, the measuring unit comprises a measuring screw rod, the measuring screw rod is arranged at the tail end of the engineering base body, one end of the measuring screw rod is positioned in the second accommodating cavity, and the other end of the measuring screw rod is provided with a micrometer knob;
an indicator lamp is arranged on the engineering base body, a V-shaped spring piece is fixedly arranged on the top wall of the accommodating cavity II, two end parts of the V-shaped spring piece are in lap joint with the outer wall of the limiting table, the indicator lamp is arranged on the engineering base body, and the V-shaped spring piece is connected with the indicator lamp through a connecting line;
the end part of one end of the measuring screw rod, which is close to the limiting table, is also connected with an indicator lamp through a connecting wire.
Further, a motor switch for controlling the pushing rack motor to work is mounted at the tail end of the engineering base body;
the bottom end of the horizontal sliding power box is provided with a threading hole, and a power line of the driving motor penetrates through a threading groove arranged on the engineering base body to be connected with external equipment;
the handheld part is provided with a switch button for controlling the driving motor to work.
Compared with the prior art, the reverse hole milling tool for processing the blind end stepped hole has the following beneficial effects:
(1) according to the reverse hole milling tool for processing the blind-end stepped hole, the gun body and the cutter arranged at the front end of the gun body are arranged, so that the blind-end stepped hole can be processed and manufactured, the processing depth of the processed blind-end stepped hole is accurately controlled, the processing precision is high, the processing rejection rate is low, and the processing requirements of batch assembly production can be met;
(2) according to the reverse hole milling tool for processing the blind-end stepped hole, an operator can hold the holding part at the bottom end of the gun body, the operator can complete processing of parts without having a particularly high skill level, time and labor are saved, the operation is simple, convenient and fast, the working efficiency is high, the field use effect is good, and the reverse hole milling tool can be popularized in a large scale.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a plan sectional view of a reverse hole milling tool for processing a blind-end stepped hole according to an embodiment of the present invention;
FIG. 2 is a front view of a cutter assembly according to an embodiment of the present invention;
FIG. 3 is a plan view of a cutter assembly according to an embodiment of the present invention;
FIG. 4 is a plan sectional view of a second state of the cutter assembly according to the embodiment of the present invention;
FIG. 5 is a schematic view of a cutter according to an embodiment of the present invention;
FIG. 6 is a schematic view of a first angular configuration of a cutter assembly and an adjustment assembly according to an embodiment of the present invention;
FIG. 7 is an elevation view of a cutter assembly and adjustment assembly according to an embodiment of the present invention;
FIG. 8 is a schematic view of a second angular configuration of the cutter assembly and adjustment assembly according to an embodiment of the present invention;
FIG. 9 is a plan cutaway view of the cutter assembly and adjustment assembly in accordance with an embodiment of the present invention;
fig. 10 is a schematic view of a sleeve and holster configuration according to an embodiment of the present invention;
FIG. 11 is a schematic view of a rotating sleeve and a switching handle according to an embodiment of the present invention;
FIG. 12 is a plan view of an engineered substrate and threading slot according to an embodiment of the invention;
fig. 13 is a plan sectional view of a reverse milling tool for processing a blind-end stepped hole according to an embodiment of the present invention before use;
FIG. 14 is a sectional view of the tool assembly according to the embodiment of the present invention extending into a hole to be machined;
FIG. 15 is a plan sectional view of the extended state of the cutter according to the embodiment of the present invention;
FIG. 16 is a sectional view of a positioning plane of the cutting tool and the positioning sleeve according to the embodiment of the present invention;
FIG. 17 is a plan view of a tool state with a set machining depth according to an embodiment of the present invention;
fig. 18 is a plan sectional view of a state after machining by the tool according to the embodiment of the present invention.
Description of reference numerals:
1-gun body; 101-an engineering substrate; 102-a lance tip; 103-a hand-held part; 104-a threading slot; 2-a cutter assembly; 201-a cutter bar; 2011-holding tank; 2012-straight slot; 2013-ring groove; 2014-rotation axis; 2015-fixation pins; 202-a cutter; 2021-groove; 2022-hook jaw; 203-a sleeve; 2031-notch; 204-plug; 205-spring one; 206-spring two; 207-rubber ring; 3-a regulating component; 301-rotating the loop bar; 302-holster; 3021-U-shaped groove; 303-a positioning sleeve; 304-switching the handle; 305-an auxiliary support; 4-a rotating assembly; 401-horizontal sliding power box; 402-a drive spindle; 403-bearing one; 404-plane bearing two; 405-a rotary driven gear; 406-a drive motor; 407-a rotating drive gear; 408-chuck locking sleeve; 409-a limit station; 4010-spring three; 4011-plane bearing three; 4012-a switch button; 5-a drive assembly; 501-guide rail shaft; 502-pushing the rack sliding table; 503-gear; 504-motor switch; 6-a measuring unit; 601-measuring screw rod; 602-micrometer knob; 603-indicator light.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a reverse hole milling tool for processing a blind-end step hole comprises a gun body 1, wherein a cutter assembly 2 for processing the blind-end step hole and an adjusting assembly 3 for controlling the working state of the cutter assembly 2 are arranged at the front end of the gun body 1, and the adjusting assembly 3 is sleeved on the cutter assembly 2;
a first cavity and a second cavity are arranged in the gun body 1, the first cavity is located at the front end of the second cavity, a rotating assembly 4 used for driving the cutter assembly 2 to rotate is installed in the first cavity, and a driving assembly 5 used for driving the rotating assembly 4 to move back and forth is installed in the second cavity.
As shown in fig. 2, the cutter assembly 2 includes a cutter bar 201, the cutter bar 201 is a cylindrical structure, a connecting end of the cutter bar 201 is fixedly connected with a front end of the gun body 1, a receiving groove 2011 is arranged at a working end of the cutter bar 201, a cutter 202 is installed in the receiving groove 2011, and an elastic mechanism for controlling the action of the cutter 202 is installed in the receiving groove 2011;
a sleeve 203 is sleeved on the outer side of the cutter bar 201, a notch 2031 corresponding to the accommodating groove 2011 is formed in the sleeve 203, the notch 2031 is of an L-shaped structure, the cutting end of the cutter 202 rotates to the outside of the notch 2031 to process a blind end step hole, and the end part of the gun case 302 close to the gun body 1 is of a tooth-shaped structure;
a threaded hole is formed in the end head of the cutter bar 201, a plug 204 is connected to the threaded hole in a threaded manner, the longitudinal section of the plug 204 is of a T-shaped structure, a first spring 205 is fixedly arranged at one end, close to the sleeve 203, of the plug 204, and the other end of the first spring 205 is fixedly connected with the sleeve 203;
as shown in fig. 2, the rotating sleeve 203 pushes the cutter 202 to switch the process: when the cutter 202 is in a retracted state and the position A of the sleeve 203 is positioned outside the cutter 202, the overall appearance of the cutter bar 201 is cylindrical, the cutter bar 201 can be sent to the back side of a workpiece to be machined through a hole to be machined, the sleeve 203 is pushed, the L-shaped notch position B of the sleeve 203 is positioned outside the cutter bar 201, the limit of the sleeve 203 on the cutter 202 is relieved, the cutter 202 is drawn by a spring and a rubber ring 207, and extends out from the L-shaped groove B of the sleeve 203 to reach a working state; the L-shaped notch position C is rotated to the previous position B by rotating the sleeve rod 301, the cutter 202 extends out from the L-shaped notch position C, the sleeve 203 and the cutter 202 are mutually limited, and the working state of the cutter bar 201 cannot be influenced by loosening the sleeve 203. The cutter bar 201 is arranged on a driving main shaft 402 of the gun body 1, rotates and stretches along with the driving main shaft 402, and performs machining action; after the machining is finished, the sleeve 203 is rotated to enable the position of the L-shaped gap B to be located at the position of the cutter 202, then the sleeve 203 is loosened, the sleeve 203 is pushed to move backwards by the first end spring 205, the cutter 202 is compressed to return to the retracted state, the position A of the L-shaped gap returns to the corresponding position outside the cutter 202, and the cutter rod 201 can be pulled out of the hole to be machined.
The end part of the connecting end of the cutter bar 201 is provided with a straight groove 2012 connected with the front end of the gun body 1, the straight groove 2012 is used for being connected with a driving main shaft 402 in the gun head 102 to prevent the cutter 202 from slipping and rotating in the circumferential direction during processing, and the connecting end of the cutter bar 201 is uniformly provided with a plurality of annular grooves 2013 for preventing the cutter 202 from moving axially during cutting;
a rotating shaft 2014 is installed in a containing groove 2011 of the cutter bar 201, the cutter 202 is installed on the rotating shaft 2014, a fixing pin 2015 is fixedly arranged in the containing groove 2011 of the cutter bar 201, and an elastic mechanism is installed on the fixing pin 2015.
As shown in fig. 5, the bottom end of the cutter 202 is an arc-shaped structure, the top end of the cutter 202 is obliquely arranged, the bottom end of the cutter 202 is further provided with a groove 2021, and a hook 2022 is fixedly arranged in the groove 2021;
as shown in fig. 3 and 4, the elastic mechanism includes a second spring 206, one end of the second spring 206 is mounted on the fixing pin 2015, the other end of the second spring 206 is fixedly connected with the rubber band 207, and one end of the rubber band 207 is fixedly connected with the hook 2022.
As shown in fig. 6 to 8, the adjusting assembly 3 is mounted at the front end of the gun body 1 and does not rotate along with the main shaft of the gun body 1 during operation, the adjusting assembly 3 includes a rotary loop bar 301, a gun sleeve 302 and a positioning sleeve 303, the rotary loop bar 301 is sleeved on the cutter bar 201, the outer diameter of the rotary loop bar 301 is equal to the outer diameter of the sleeve 203, the front end of the rotary loop bar 301 is of a tooth-shaped structure and is engaged with the tooth-shaped structure arranged at the end of the sleeve 203, and the outer wall of the rotary loop bar 301 is in threaded connection with a switching handle 304; the position of the switching handle 304 is adjusted by controlling the switching handle 304 to enable the rotating sleeve rod 301 to be meshed and connected with the sleeve 203, so that the position state of the switching cutter 202 is realized;
the switching handle 304 is moved to drive the rotating sleeve rod 301 to move, so that the effect of switching the state of the cutter 202 is achieved; the switching handle 304 is located at the U-shaped groove position a, and the cutter 202 is in the retracted state; when the switching handle 304 is pushed to move to the position B, the rotating sleeve rod 301 is contacted and meshed with the sleeve 203, in the process of pushing the switching handle 304, the rotating sleeve rod 301 pushes the sleeve 203 to move leftwards, the cutter 202 is ejected out of the accommodating groove 2011 under the action of the spring mechanism, when the cutter 202 reaches the position B, the sleeve is blocked by the cutter 202, and the switching handle 304 cannot move forwards continuously; then, the switching handle 304 is rotated from the position b to the position C, the switching handle 304 drives the rotating sleeve rod 301 to rotate, the sleeve 203 is meshed with the rotating sleeve rod 301 and rotates along with the rotating sleeve rod, and the cutter 202 is located at the position C; the switching handle 304 moves backwards to a position d, the sleeve 203 is clamped by the cutter 202, the cutter 202 is fixed at a position C, the switching handle 304 drives the rotary sleeve rod 301 to move backwards and is separated from the sleeve 203, the rotary sleeve rod 301 and the sleeve 203 are not in an engaged state any more, and the sleeve 203 cannot move due to the limitation of the spring and the cutter 202; when the cutter 202 rotates, the sleeve 203 rotates synchronously and the rotating sleeve rod 301 does not rotate; after the processing task is finished, the switching handle 304 returns to the position a from the position d through the positions c and b, the rotating sleeve rod 301 is meshed with the sleeve 203 again, the sleeve 203 and the cutter 202 are driven to be unlocked, and finally the cutter 202 returns to the position A and is in a retraction state under the restoring action of the spring;
the gun sleeve 302 is sleeved on the rotary loop bar 301, one end of the gun sleeve 302 is in threaded connection with the front end of the gun body 1, a U-shaped groove 3021 is formed in the gun sleeve 302, and the switching handle 304 is located in the U-shaped groove 3021 and can slide and rotate in a limited range relative to the gun sleeve 302 through the limiting effect of the U-shaped groove 3021; the inner diameter of the gun case 302 is matched with the outer diameter of the cutter bar 201, and the gun case is of serial size specifications. When step holes with different diameters are machined, the cutter assembly 2 and the adjusting assembly 3 with corresponding specifications are selected according to the diameter of the base hole;
an auxiliary support 305 for assisting an operator to hold the gun body 1 is also fixedly arranged on the outer wall of the gun case 302;
the positioning sleeve 303 is provided with internal threads, the positioning sleeve 303 is in threaded connection with the other end of the gun sleeve 302, and the inner diameter of the positioning sleeve 303 is larger than the outer diameter of the sleeve 203; the positioning sleeve 303 is cylindrical and is connected to the external thread of the gun sleeve 302 through an internal thread, the front and back positions of the positioning sleeve 303 can be adjusted by driving the positioning sleeve 303 to move back and forth through the thread in a rotating mode, the front and back positions are used for adjusting the distance between the gun body 1 and the front surface of a workpiece to be machined, and the positioning sleeve is matched with a micrometer mechanism at the tail end of the gun body 1 to control the depth of a step hole to be machined.
As shown in fig. 1, the gun body 1 comprises an engineering base 101, a gun head 102 is mounted at the front end of the engineering base 101, the gun head 102 is provided with internal threads, and the gun head 102 is in threaded connection with the tail end of a gun sleeve 302;
a cavity is arranged in the engineering base body 101, a first accommodating cavity and a second accommodating cavity are both arranged in the cavity of the engineering base body 101, and the first accommodating cavity is communicated with the gun head 102 at the front end and is also communicated with the second accommodating cavity at the rear end;
the tail end of the engineering base body 101 is also provided with a measuring unit 6 for setting the feeding depth of the cutter 202;
the bottom end of the engineering base body 101 is also fixedly provided with a handheld part 103 for an operator to hold the gun body 1.
The rotating assembly 4 comprises a horizontal sliding power box 401, the horizontal sliding power box 401 is used for driving a driving main shaft 402 and a cutter 202 assembly 2 to rotate, the shape of the box body is consistent with that of a cavity of a base body, when the cutter 202 assembly 2 moves back and forth, the horizontal sliding power box 401 and the driving main shaft 402 slide back and forth while the engineering base body 101 is not moved, the horizontal sliding power box 401 is arranged in a first accommodating cavity, a through cavity is arranged in the horizontal sliding power box 401, the driving main shaft 402 is arranged in the cavity, and a first bearing 403 and a second planar bearing 404 are assembled between the driving main shaft 402 and the inner wall of the horizontal sliding power box 401;
a rotary driven gear 405 is installed on the driving main shaft 402, a driving motor 406 is further arranged in the cavity of the horizontal sliding power box 401, a rotary driving gear 407 is fixedly arranged at an output shaft end of the driving motor 406, and the rotary driving gear 407 is meshed with the rotary driven gear 405;
the end part of one end of the driving main shaft 402 extends to the interior of the gun head 102 and is provided with a flat driving rib, the flat driving rib is fixedly connected with a straight groove 2012 arranged at the end part of the cutter bar 201, the end part of the driving main shaft 402 is further provided with a chuck locking sleeve 408 used for locking and fixing the cutter bar 201 and the driving main shaft 402, the end part of the other end of the driving main shaft 402 extends to the interior of the accommodating cavity II and is fixedly provided with a limiting table 409, the driving main shaft 402 positioned between the limiting table 409 and the inner wall of the accommodating cavity II is further sleeved with a spring III 4010, one end of the spring III 4010 is fixedly connected with the side wall of the limiting table 409, the other end of the spring III 4010 is fixedly connected with a plane bearing III 4011, the plane bearing III 4011 is installed on the driving main shaft 402, and the plane bearing III 4011 is fixedly connected with the inner wall of the accommodating cavity II.
The driving assembly 5 comprises a guide rail shaft 501 fixedly arranged on the inner wall of the accommodating cavity II, a pushing rack sliding table 502 is arranged on the guide rail shaft 501 in a sliding manner, a meshing part is arranged at the bottom end of the pushing rack sliding table 502, and a protruding part used for pushing the limiting table 409 is arranged at the top end of the pushing rack sliding table 502;
a pushing rack motor is arranged in the second accommodating cavity, a gear 503 is mounted at the output shaft end of the pushing rack motor, and the gear 503 is meshed with the meshing part of the pushing rack sliding table 502; a threading slot 104 for connecting a pushing rack motor with external equipment is arranged on the engineering base body 101, and the pushing rack motor is not shown in the figure;
when the pushing rack motor works, the gear 503 is driven to rotate, the gear 503 drives the pushing rack sliding table 502 to move forwards along the guide rail shaft 501, in the moving process, the protruding part at the upper end of the pushing rack sliding table pushes the rotating main shaft and the limiting table 409 on the rotating main shaft to move forwards, and at the moment, the spring is gradually compressed; when the motor stops, the compressed spring provides a retreating feeding force for the driving main shaft 402 and the tool 202 to push the driving main shaft 402 and the tool 202 to move backwards, in the retreating process of the main shaft, the depth measuring screw 601 and the micrometer are used for setting the feeding depth of the tool 202, when the driving main shaft 402 moves backwards to the limiting table 409 and contacts with the end face of the measuring screw 601, the indicator light 603 is turned on, and the feeding action of the tool 202 is completed.
The measuring unit 6 comprises a measuring screw 601, the measuring screw 601 is arranged at the tail end of the engineering base body 101, one end of the measuring screw 601 is positioned in the second accommodating cavity, and the other end of the measuring screw 601 is provided with a micrometer knob 602;
an indicator light 603 is arranged on the engineering base body 101, a V-shaped spring piece is fixedly arranged on the top wall of the second accommodating cavity, two end parts of the V-shaped spring piece are in lap joint with the outer wall of a limiting table 409, the limiting table 409 is of a metal structure, the indicator light 603 is arranged on the engineering base body 101, the V-shaped spring piece is connected with the indicator light 603 through a connecting line, when the limiting table 409 moves back and forth, the V-shaped spring piece is always kept in contact with the outer wall of the limiting table, and the V-shaped spring piece is not shown in the figure;
the end part of the measuring screw 601 close to one end of the limiting table 409 is of a metal structure, and the measuring screw 601 is connected with an indicator light 603 through a connecting line; the device is equivalent to a switch, namely when the end of the measuring screw 601 is contacted with the limit table 409, the circuit is connected, the indicator light is on, when the measuring screw 601 is separated from the limit table and is not contacted, the circuit is disconnected, and the indicator light is off.
The tail end of the engineering base body 101 is provided with a motor switch 504 for controlling the push rack motor to work;
the bottom end of the horizontal sliding power box 401 is provided with a threading hole, a power line of the driving motor 406 penetrates through a threading groove 104 arranged on the engineering base body 101 to be connected with external equipment, and the power line is not influenced by the forward and backward movement of the horizontal sliding power box 401;
a switch button 4012 for controlling the operation of the driving motor 406 is installed on the hand grip 103.
In the implementation of the scheme, the cutter assembly 2 and the gun case 302 assembly are installed, the tool as a whole is shown in fig. 1, and the corresponding cutter 202, the gun case 302, the positioning sleeve 303 and the rotating sleeve 203 are selected according to the thickness and the aperture of a workpiece to be machined and the diameter of a machined stepped hole. The rotating sleeve 203 is first placed in the gun case 302, the relative position between the two is adjusted, the switching handle 304 is screwed onto the rotating sleeve 203 from the outside of the U-shaped groove 3021 of the gun case 302, the installation of the rotating sleeve 203 and the gun case 302 is completed, the cutter 202 assembly 2 is ensured to be in the retracted state, and the cutter 202 is received in the receiving groove 2011 of the cutter bar 201 and corresponds to the L-shaped notch a of the sleeve 203. The cutter 202 is inserted into the left side of the gun sleeve 302, the cutter rod 201 penetrates out of the rotating sleeve 203, the cutter rod 201 is connected with a chuck of the tool gun, a straight groove 2012 and an annular groove 2013 are formed in the tail of the cutter rod 201, the annular groove 2013 is used for being meshed and tightly clamped with the chuck of the tool gun, axial slipping of the cutter 202 during machining is prevented, the straight groove 2012 is matched with a flat driving rib at the front end of the driving spindle 402 to prevent the cutter 202 from slipping and rotating circumferentially during machining, the chuck locking sleeve 408 is tightened to completely fix the cutter rod 201 and the driving spindle 402, the gun head 102 is screwed into the engineering base body 101 of the tool gun and is tightened and fixed, and at the moment, the assembling work of the tool gun is completed.
Before the tool is used, as shown in fig. 13, before the tool is used, the positioning sleeve 3031 is rotated to move to the rearmost end of the stroke, the micrometer at the tail end of the base body is checked to be at the zero point, if the micrometer is not at the zero point, the pushing rack motor switch 504 is pressed, the pushing rack motor driving gear 503 is started to rotate, the pushing rack sliding table 502 is driven to move leftwards on the guide rail shaft 501, in the moving process, the protruding part on the pushing rack sliding table 502 pushes the limiting table 409, the driving spindle 402, the cutter bar 201 and the horizontal sliding power box 401 to the frontmost end, the micrometer knob 602 is rotated immediately, the micrometer is adjusted to the zero position, the pushing rack motor switch 504 is pressed, the pushing rack motor stops working, the driving spindle 402 moves backwards under the pushing of the spring three 4010 until the limiting table 409 is contacted with the measuring screw 601, at this time, the internal circuit is connected, and the indicator light 603 is on.
Inserting the tool bar 201 into the hole to be processed, as shown in fig. 14; pushing the switch handle 304 from the U-shaped groove 3021a position to the d position, the sleeve 203 follows the movement and rotation, and the cutter 202 is extended and fixed at the L-shaped groove C position, as shown in fig. 15; the gun is moved backward until the tool 202 touches the back of the workpiece to be machined, and the positioning sleeve 303 is rotated to move forward until the positioning sleeve abuts against the front of the workpiece to be machined, as shown in fig. 16.
Before the preparation starts to process, firstly, the knob 602 of the micrometer at the tail part of the riveter is rotated, the micrometer is driven to measure the screw 601 to retreat, the retreating distance of the screw can be directly read on the micrometer in real time until the required target processing depth is adjusted, as shown in fig. 17, at this time, all operations before the preparation for processing are completed.
When machining is started, a motor switch 504 is pressed, a driving motor 406 is started, a gear 503 drives a driving main shaft 402 and a cutter bar 201 to rotate at a high speed, the driving main shaft 402 and the cutter bar 201 gradually retreat under the action of a spring III 4010, in the retreating process, a rotating cutter 202 finishes reverse milling of a stepped hole, the driving main shaft 402 is pushed by the spring III 4010 to retreat until a limiting table 409 is in contact with a measuring screw 601, at the moment, the cutter bar 201 cannot retreat continuously, an indicator light 603 is immediately turned on, and machining is prompted to be finished; at this time, the motor switch 504 is released, and the driving motor 406 stops operating, and at this time, the machining of the stepped hole with the set specific depth is completed, as shown in fig. 18.
Returning to the initial state as shown in fig. 13, the operation process is as follows: the push rack motor switch 504 is pressed, the starting motor pushes the cutter bar 201 and the driving main shaft 402 to the forefront end, and the micrometer is adjusted to a zero point. The push rack motor switch 504 is pressed, the motor stops working, the main shaft 402 is driven to move backwards under the pushing of the spring III 4010 until the limit table 409 is contacted with the measuring screw 601, the indicator light 603 is lightened, the positioning sleeve 303 is rotated to move to the rearmost end, then the whole tool gun is moved forwards, the tool rod 201 and the blind end plate surface are separated from a sufficient distance, the switching handle 304 on the rotating sleeve 203 is positioned at the position a of the U-shaped groove 3021 on the gun sleeve 302 at the moment, the tool rod 201 is driven to return to the retracted state, the tool rod 201 is pulled out from the hole, and the machining is finished at the moment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a reverse hole milling tool in processing cecum step hole which characterized in that: the gun comprises a gun body (1), wherein a cutter component (2) used for processing a blind-end step hole and an adjusting component (3) used for controlling the working state of the cutter component (2) are arranged at the front end of the gun body (1), and the adjusting component (3) is sleeved on the cutter component (2);
be provided with cavity one and cavity two in the rifle body (1), cavity one is located the front end of cavity two, installs in the cavity one to be used for driving rotatory rotating assembly (4) of cutter subassembly (2), installs in the cavity two to be used for driving the drive assembly (5) of rotating assembly (4) back-and-forth movement.
2. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 1, wherein: the cutter assembly (2) comprises a cutter bar (201), the connecting end of the cutter bar (201) is fixedly connected with the front end of the gun body (1), the working end of the cutter bar (201) is provided with an accommodating groove (2011), a cutter (202) is arranged in the accommodating groove (2011), and an elastic mechanism for controlling the action of the cutter (202) is arranged in the accommodating groove (2011);
a sleeve (203) is sleeved on the outer side of the cutter bar (201), a notch (2031) corresponding to the accommodating groove (2011) is formed in the sleeve (203), the notch (2031) is of an L-shaped structure, the cutting end of the cutter (202) rotates to the outside of the notch (2031) to process a blind end step hole, and the end part of one end, close to the gun body (1), of the gun case (302) is of a tooth-shaped structure;
a threaded hole is formed in the end head of the cutter rod (201), a plug (204) is connected to the threaded hole in an internal thread mode, the longitudinal section of the plug (204) is of a T-shaped structure, a first spring (205) is fixedly arranged at one end, close to the sleeve (203), of the plug (204), and the other end of the first spring (205) is fixedly connected with the sleeve (203).
3. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 2, wherein: the end part of the connecting end of the cutter bar (201) is provided with a straight groove (2012) connected with the front end of the gun body (1), and the connecting end of the cutter bar (201) is uniformly provided with a plurality of ring grooves (2013) for preventing the cutter (202) from axially moving in the cutting process;
install rotation axis (2014) in holding tank (2011) of cutter arbor (201), cutter (202) are installed on rotation axis (2014), still fixedly in holding tank (2011) of cutter arbor (201) are provided with fixed pin (2015), and elastic mechanism installs on fixed pin (2015).
4. A reverse milling bore tool for machining blind-end stepped bores according to claim 3, wherein: the bottom end of the cutter (202) is of an arc-shaped structure, the top end of the cutter (202) is obliquely arranged, the bottom end of the cutter (202) is also provided with a groove (2021), and a hook claw (2022) is fixedly arranged in the groove (2021);
the elastic mechanism comprises a second spring (206), one end of the second spring (206) is installed on the fixing pin (2015), the other end of the second spring (206) is fixedly connected with the rubber ring (207), and one end of the rubber ring (207) is fixedly connected with the hook claw (2022).
5. A reverse milling bore tool for machining blind-end stepped bores according to claim 3, wherein: the adjusting assembly (3) comprises a rotary loop bar (301), a gun sleeve (302) and a positioning sleeve (303), the rotary loop bar (301) is sleeved on the cutter bar (201), the outer diameter of the rotary loop bar (301) is equal to that of the sleeve (203), the front end part of the rotary loop bar (301) is of a tooth-shaped structure and is meshed with the tooth-shaped structure arranged at the end part of the sleeve (203), and the outer wall of the rotary loop bar (301) is in threaded connection with a switching handle (304);
the gun sleeve (302) is sleeved on the rotary sleeve rod (301), one end of the gun sleeve (302) is in threaded connection with the front end of the gun body (1), a U-shaped groove (3021) is formed in the gun sleeve (302), and the switching handle (304) is positioned in the U-shaped groove (3021);
an auxiliary support (305) for assisting an operator to hold the gun body (1) is also fixedly arranged on the outer wall of the gun case (302);
the positioning sleeve (303) is provided with internal threads, the positioning sleeve (303) is in threaded connection with the other end of the gun sleeve (302), and the inner diameter of the positioning sleeve (303) is larger than the outer diameter of the sleeve (203).
6. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 1, wherein: the gun body (1) comprises an engineering base body (101), a gun head (102) is mounted at the front end of the engineering base body (101), internal threads are formed in the gun head (102), and the gun head (102) is in threaded connection with the tail end of a gun sleeve (302);
a cavity is arranged in the engineering base body (101), the first accommodating cavity and the second accommodating cavity are both arranged in the cavity of the engineering base body (101), and the first accommodating cavity is communicated with the gun head (102) at the front end and is also communicated with the second accommodating cavity at the rear end;
the tail end of the engineering base body (101) is also provided with a measuring unit (6) for setting the feeding depth of the cutter (202);
the bottom end of the engineering base body (101) is also fixedly provided with a handheld part (103) for an operator to hold the gun body (1).
7. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 6, wherein: the rotating assembly (4) comprises a horizontal sliding power box (401), the horizontal sliding power box (401) is installed in the accommodating cavity I, a through cavity is formed in the horizontal sliding power box (401), a driving main shaft (402) is installed in the cavity, and a bearing I (403) and a plane bearing II (404) are assembled and installed between the driving main shaft (402) and the inner wall of the horizontal sliding power box (401);
a rotary driven gear (405) is mounted on the driving main shaft (402), a driving motor (406) is further arranged in a cavity of the horizontal sliding power box (401), a rotary driving gear (407) is fixedly arranged at an output shaft end of the driving motor (406), and the rotary driving gear (407) is meshed with the rotary driven gear (405);
drive main shaft (402) one end tip extends to in rifle head (102) with cutter arbor (201) fixed connection, drive main shaft (402) tip still is provided with and is used for cutter arbor (201) and drive main shaft (402) locking fixed chuck lock sleeve (408), drive main shaft (402) other end tip extends to and holds two internal fixations in chamber and is provided with spacing platform (409), still the cover is equipped with spring three (4010) on drive main shaft (402) that is located between spacing platform (409) and the two inner walls in chamber, the one end and the spacing platform (409) lateral wall fixed connection of spring three (4010), the other end fixedly connected with plane bearing three (4011) of spring three (4010), install on drive main shaft (402) plane bearing three (4011), plane bearing three (4011) and the inner wall fixed connection who holds chamber two.
8. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 7, wherein: the driving assembly (5) comprises a guide rail shaft (501) fixedly arranged on the inner wall of the accommodating cavity, a pushing rack sliding table (502) is arranged on the guide rail shaft (501) in a sliding mode, a meshing part is arranged at the bottom end of the pushing rack sliding table (502), and a protruding part used for pushing the limiting table (409) is arranged at the top end of the pushing rack sliding table (502);
a pushing rack motor is arranged in the second accommodating cavity, a gear (503) is mounted at the output shaft end of the pushing rack motor, and the gear (503) is meshed with the meshing part of the pushing rack sliding table (502);
the engineering base body (101) is provided with a threading groove (104) for connecting the pushing rack motor with external equipment.
9. The reverse hole milling tool for machining blind-end stepped holes as claimed in claim 7, wherein: the measuring unit (6) comprises a measuring screw rod (601), the measuring screw rod (601) is arranged at the tail end of the engineering base body (101), one end of the measuring screw rod (601) is located in the second accommodating cavity, and the other end of the measuring screw rod (601) is provided with a micrometer knob (602);
a V-shaped spring piece is fixedly arranged on the top wall of the second accommodating cavity, two end parts of the V-shaped spring piece are in lap joint with the outer wall of the limiting table (409), an indicating lamp (603) is arranged on the engineering base body (101), and the V-shaped spring piece is connected with the indicating lamp (603) through a connecting line;
the end part of one end of the measuring screw rod (601) close to the limiting table (409) is also connected with an indicator lamp (603) through a connecting line.
10. A reverse milling bore tool for machining blind-end stepped bores according to claim 9, wherein: the tail end of the engineering base body (101) is provided with a motor switch (504) for controlling the push rack motor to work;
the bottom end of the horizontal sliding power box (401) is provided with a threading hole, and a power line of the driving motor (406) passes through a threading groove (104) arranged on the engineering base body (101) and is connected with external equipment;
the handheld part (103) is provided with a switch button (4012) for controlling the operation of the driving motor (406).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210061561.7A CN114226818B (en) | 2022-01-19 | 2022-01-19 | Reverse hole milling tool for processing blind end stepped hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210061561.7A CN114226818B (en) | 2022-01-19 | 2022-01-19 | Reverse hole milling tool for processing blind end stepped hole |
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| CN114226818A true CN114226818A (en) | 2022-03-25 |
| CN114226818B CN114226818B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210061561.7A Active CN114226818B (en) | 2022-01-19 | 2022-01-19 | Reverse hole milling tool for processing blind end stepped hole |
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| US4475852A (en) * | 1981-12-24 | 1984-10-09 | Santrade Ltd. | Retractable rotary cutting tool |
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| CN102380630A (en) * | 2010-09-03 | 2012-03-21 | 株式会社日研工作所 | Back boring cutting tool |
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| CN106392150A (en) * | 2009-03-13 | 2017-02-15 | 乌尔夫·胡勒 | Pressure-medium-controlled countersinking tool |
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| CN213916156U (en) * | 2020-11-13 | 2021-08-10 | 绵阳市绵工工具有限公司 | Hydraulic automatic opening reverse scraper tool for machining reverse side step hole |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475852A (en) * | 1981-12-24 | 1984-10-09 | Santrade Ltd. | Retractable rotary cutting tool |
| CN106392150A (en) * | 2009-03-13 | 2017-02-15 | 乌尔夫·胡勒 | Pressure-medium-controlled countersinking tool |
| CN101927356A (en) * | 2009-06-18 | 2010-12-29 | 株式会社日研工作所 | Back boring cutting tool |
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| US20160332238A1 (en) * | 2015-05-11 | 2016-11-17 | The Boeing Company | Back spotfacing system and method |
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| CN114226818B (en) | 2023-04-25 |
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