CN114749969A - Conical thin-wall part tool and positioning method - Google Patents
Conical thin-wall part tool and positioning method Download PDFInfo
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- CN114749969A CN114749969A CN202210273307.3A CN202210273307A CN114749969A CN 114749969 A CN114749969 A CN 114749969A CN 202210273307 A CN202210273307 A CN 202210273307A CN 114749969 A CN114749969 A CN 114749969A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
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Abstract
The invention discloses a conical thin-wall part tool and a positioning method. The conical thin-wall part can be positioned by adopting the housing, the tail tip cone, the auxiliary supporting device and the accessory parts thereof, so that the clamp has a simple structure and is convenient to realize and assemble; the invention adopts the conical through hole of the housing with the same taper as the conical thin-wall part to perform contact positioning on the outer side surface of the large end of the workpiece, the floating tail tip cone performs contact positioning on the ball end of the conical thin-wall part, the pressing block of the large end surface of the housing positions the large end surface of the conical thin-wall part, and simultaneously, the support body of the auxiliary positioning device is adopted to contact with the middle part of the outer side surface of the conical thin-wall part to perform auxiliary positioning, so that the accurate positioning of the conical thin-wall part can be realized. The positioning adjustment process is efficient, and the positioning accuracy is high.
Description
Technical Field
The invention relates to a machining technology of a conical thin-wall part, in particular to a tool and a positioning method of the conical thin-wall part.
Background
The antenna cover is a large conical thin-wall part and one of parts for an aviation aircraft, and is made of fused quartz, the Mohs hardness of the fused quartz is 7, the Vickers hardness of the fused quartz is HV260, and the elastic modulus of the fused quartz is about 72.4 multiplied by 103MPa, tensile strength of 34.4MPa, high hardness, low elastic modulus, high compression strength, low tensile strength, poor plastic toughness and good heat resistance. The shape characteristics of the conical thin-wall part enable the part to have strong axial pressure resistance and to be easy to deform during radial clamping; the traditional positioning mode aiming at the parts adopts scattered cover plates to be combined, the relative position of each cover plate needs to be continuously adjusted after the freedom degree of the workpiece is limited, the positioning precision of the clamping parts is low by the clamping mode, and the position of the antenna housing is frequently changed in the measuring or machining process due to the requirement so as to meet the test postures of different positions. In addition, for some enterprises of the parts, a vacuum adsorption mode is adopted, and the axial clamping of the radome is realized by the friction force between the radome and a female die generated by negative pressure, and although the positioning accuracy of the positioning mode is relatively high, the clamping force needs to be strictly controlled so as to avoid damaging workpieces; meanwhile, the positioning mode has a complex structure and high manufacturing cost.
With the development of the radar technology at present, the antenna housing matched with the radar technology needs to be produced in large quantity, and a novel clamp needs to be invented at the moment, so that the demand of parts of the antenna housing of a radar system is met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a conical thin-wall part tool and a positioning method which are simple in structure, high in positioning accuracy and high in machining efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a conical thin-wall part tool comprises a screw rod, a cover plate, a handle seat, a screw rod seat, a thrust bearing, a spring, a screw rod nut, a housing, a tail tip cone, a supporting body, a pressing block, a guide bolt, a ball, a sliding block and a rotary table;
the housing is of a conical structure, the left section is a circular tube, the middle section is a conical shell, the right section is a ring body, the left end is a small end, the right end is a large end, an inner hole of the ring body is a conical through hole, the taper of the conical through hole is the same as that of the conical thin-wall part, and the conical through hole is in contact with the outer side surface of the large end of the conical thin-wall part and is used for radial positioning and axial positioning of the large end of the conical thin-wall part; the right end face of the circular ring body is fixedly connected with the pressing block; the pressing block simultaneously presses the large end face of the conical thin-wall part;
The inner hole of the circular tube is matched with the tail top taper hole shaft; the screw rod nut is fixedly arranged at the left end of the tail tip cone; the left end of the housing is fixedly connected with the screw rod seat, and the left end of the screw rod seat is fixedly connected with the handle seat;
a boss is arranged in the middle of the screw rod, the screw rod on the left side of the boss is a polished rod, and the screw rod on the right side of the boss is a threaded rod; the right section of the screw rod is in threaded connection with a screw rod nut; a spring, a thrust bearing, a screw rod seat and a cover plate are sequentially arranged on the left section of the screw rod from right to left; the spring is used for buffering in the installation process of the conical thin-wall part; the handle seat is a circular tube body, and the inner side of the circular tube body is connected with the outer side of the cover plate;
four radial through holes are uniformly distributed in the screw rod seat along the circumferential direction, annular grooves are formed in the positions, corresponding to the radial through holes, of the screw rod, the shape and the size of each annular groove are just good, half of the balls fall into the annular grooves of the screw rod, and the balls fall into the annular grooves of the screw rod from the radial through holes of the screw rod seat by means of gravity to lock the position of the screw rod; the tail part of the screw rod is provided with a square seat, and the screw rod is rotated by rotating the square seat through a spanner; the length of the radial through hole is smaller than the diameter of the ball.
The left end of the housing is connected with the rotary table through the three-jaw chuck and used for controlling circumferential rotation of the housing. The right end of the housing is arranged on the center frame, and the axis position of the conical thin-wall part is adjusted by moving the sliding block on the center frame to adjust the axis position of the housing.
Furthermore, the central hole of the screw rod seat is three sections of stepped circular holes, the circular hole at the left section has the smallest diameter and is matched with the screw rod, the circular hole at the middle section is provided with a thrust bearing, and the circular hole at the right section has the largest diameter; the end face of the right end of the screw rod seat is a two-stage annular end face, and the annular end face of the outer side is in contact positioning with the end face of the small end of the housing;
the outer side surface of the screw rod seat is a three-section stepped cylindrical surface, the left section cylindrical surface has the smallest diameter and is connected with the inner side of a middle section round hole of the handle seat, the middle section cylindrical surface is connected with the inner side of a right section round hole of the handle seat, and a middle annular end surface at the left end of the screw rod seat is connected with an inner annular end surface at the right end of the handle seat; the diameter of the right section cylindrical surface is maximum;
the central hole of the handle seat is three sections of stepped round holes, the diameter of the round hole at the middle section is the smallest, and the round holes are used for being matched and connected with the outer side of the screw rod seat and the outer side of the right section of the cover plate at the same time; the diameter of the circular hole of the left section is larger than that of the middle section, and the circular hole is used for matching connection of the outer side of the left section of the cover plate; the diameter of the round hole of the right section is the largest and is used for being matched and connected with the outer side of the middle section of the screw rod seat; four semicircular grooves are evenly distributed on the inner side of the handle seat along the circumferential direction, the shape and the size of each semicircular groove are the same as those of a half of each ball, and when the circumferential position of each semicircular groove is the same as that of the corresponding radial through hole of the screw seat, each ball enters the corresponding semicircular groove of the handle seat through the corresponding radial through hole of the screw seat.
Furthermore, four threaded holes are formed in the left end face of the lead screw seat along the circumferential direction; the big terminal surface of lead screw seat sets up four shoulder holes along circumference for installation bolt B, bolt B is with lead screw seat and housing fixed connection. The cover plate is circumferentially provided with four axial through holes for connecting with four threaded holes of the screw rod seat through bolts C; after the cover plate and the screw rod seat are connected, the cover plate and the boss of the screw rod seat extrude the handle seat in the middle, and the axial positioning of the handle seat is completed.
Further, a thread through hole is formed in the inner side of the lead screw nut and is used for being in thread fit with a lead screw; a boss is arranged at the left end of the outer side of the screw nut and is in contact positioning with the tail tip cone; the left end face of the screw nut is provided with two through holes for fixedly connecting the screw nut and the tail tip cone through a bolt A.
Furthermore, the right end of the tail tip cone is provided with a conical through hole, the conical degree of the conical through hole is larger than that of the conical thin-wall part, and the conical through hole is in contact positioning with the left end of the conical thin-wall part and is used for axial and radial positioning of the conical thin-wall part; and a rectangular key groove is formed in the outer side of the tail tip cone.
Furthermore, the left section of the housing is provided with a radial thread through hole, a guide bolt is installed in the radial thread through hole, and the inner end of the guide bolt is in contact with the rectangular groove of the tail tip cone and used for axial guiding of the tail tip cone.
Furthermore, a plurality of auxiliary supporting devices are arranged in the conical shell at the middle section of the housing, each auxiliary supporting device comprises a screw, a nut and a supporting body, the nut is welded and fixed on the housing, the outer end of the screw is in threaded connection with the nut, and the inner end of the screw is connected with the supporting body through a spherical hinge; the inner end of the supporting body is in contact with the conical thin-wall part.
Furthermore, the auxiliary supporting device is provided with three groups along the axial direction of the conical shell, and each group is provided with three groups along the circumferential direction.
Furthermore, flexible gaskets are arranged among the supporting body, the tail tip cone, the housing, the pressing block and the conical thin-wall part and used for preventing the conical thin-wall part from being damaged in the positioning process.
A positioning method of a conical thin-wall part utilizes a conical thin-wall part tool to position, and comprises the following steps:
A. axial and radial positioning of conical thin-walled parts
A1, horizontally placing the conical thin-wall part and slowly feeding the conical thin-wall part into a horizontally placed housing, wherein the ball end of the conical thin-wall part is firstly contacted with the conical through hole at the right end of the tail tip cone;
a2, the tail tip cone drives a lead screw compression spring to move left continuously through a lead screw nut until the outer side surface of the large end of the conical thin-wall part is contacted with the conical through hole of the annular body at the right section of the housing to realize self locking;
A3, the annular groove on the screw is exactly the same as the axial positions of the four radial through holes on the inner side of the screw seat, and half of the balls in the radial through holes fall into the annular groove on the screw under the action of gravity, and the other half of the balls are positioned in the radial through holes of the screw seat;
a4, rotating the handle base to enable the circumferential positions of four semicircular grooves of the handle base to be staggered with the positions of four radial through holes of the screw base, so that balls are clamped between an annular groove of the screw and the radial through holes of the screw base, and the axial position of the screw is locked;
and A5, rotating the pressing block to press the conical thin-wall part on the large end face of the conical thin-wall part to complete the axial and radial positioning of the conical thin-wall part.
B. Auxiliary positioning of conical thin-wall parts
Sequentially screwing down screws in each auxiliary supporting device to enable the supporting body to be fully contacted with the outer side surface of the conical thin-wall part, so that auxiliary positioning of the conical thin-wall part is completed;
C. centering axis of conical thin-wall part
The three-jaw chuck on the rotary table is in a loose state, a sliding block on the center frame is moved, the axis position of the conical thin-wall part is the same as the axis position of a machine tool spindle by adjusting the axis position of the housing, the three-jaw chuck is locked, and the position of the housing is fixed; the conical thin-wall part is rotated along the axis by rotating the three-jaw chuck on the rotary table so as to meet different measurement and processing poses;
D. Carrying out the disassembly of conical thin-walled parts
After the conical thin-wall part is machined, the three-jaw chuck on the rotary table is loosened to separate the housing from the rotary table, the screw in the auxiliary supporting device is loosened to separate the supporting body from the outer side surface of the conical thin-wall part, the pressing block is rotated to be in the position avoiding the axial movement of the large end surface of the conical thin-wall part, the square seat at the tail part of the screw rod is rotated through the wrench, the screw rod is rotated by applying torque, the screw rod nut is driven to do axial movement through the rotary movement of the screw rod, and the tail tip cone makes linear movement to push the conical thin-wall part out of the housing.
E. Screw rod reset
The handle seat is rotated to enable the circumferential positions of the four semicircular grooves on the inner side of the handle seat to be the same as the circumferential positions of the four radial through holes of the screw rod seat, the screw rod is driven to do linear motion under the action of the spring, the ball enters the four semicircular grooves of the handle seat through half of the four radial through holes of the screw rod seat under the pushing action of the annular groove of the screw rod, and the screw rod continues to do linear motion until the screw rod resets.
Compared with the prior art, the invention has the following beneficial effects:
1. the conical thin-wall part can be positioned by adopting the housing, the tail tip cone, the auxiliary supporting device and the accessory parts thereof, so that the clamp has a simple structure and is convenient to realize and assemble;
2. According to the invention, the tapered through hole of the housing with the same taper as the tapered thin-wall part is adopted to perform contact positioning on the outer side surface of the large end of the workpiece, the floating tail tip cone performs contact positioning on the ball end of the tapered thin-wall part, the pressing block of the large end surface of the housing positions the large end surface of the tapered thin-wall part, and meanwhile, the support body of the auxiliary positioning device is adopted to contact the middle part of the outer side surface of the tapered thin-wall part to perform auxiliary positioning, so that accurate positioning of the tapered thin-wall part can be realized. The positioning adjustment process is high in efficiency and positioning accuracy;
3. the invention adopts the center frame device, the axis position of the cover shell is adjusted by moving the slide block on the center frame, so that the axis position of the conical thin-wall part is the same as the axis position of the machine tool spindle, and meanwhile, the cover shell can be rotated by rotating the three-jaw chuck on the turntable, so that the circumferential position of the conical thin-wall part is adjusted to meet different pose requirements during measurement processing, and the processing efficiency is improved.
Drawings
FIG. 1 is a full sectional view of a tapered thin-walled part under clamping by a fixture.
Fig. 2 is a sectional view A-A of a tapered thin-walled part clamped by a clamp.
Fig. 3 is a partially enlarged view of the rear end of the clip.
FIG. 4 is an overall view of a tapered thin-walled part tooling.
FIG. 5 is a right side view of a tapered thin-walled part tooling.
Fig. 6 is a longitudinal sectional view of the lead screw base.
Fig. 7 is a left side view of the handle seat.
In the figure: 1. the screw comprises a screw rod, 2, a cover plate, 3, a handle seat, 4, a screw rod seat, 5, a thrust bearing, 6, a spring, 7, a screw rod nut, 8, a cover shell, 9, a tail tip cone, 10, a screw, 11, a nut, 12, a support body, 13, a conical thin-wall part, 14, a pressing block, 15, a guide bolt, 16, a bolt A, 17, a bolt B, 18, a ball, 19, a bolt C, 20, a sliding block, 21 and a rotary table.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1-7, a tapered thin-walled part tool comprises a screw 1, a cover plate 2, a handle seat 3, a screw seat 4, a thrust bearing 5, a spring 6, a screw nut 7, a housing 8, a tail tip cone 9, a support body 12, a pressing block 14, a guide bolt 15, a ball 18, a sliding block 20 and a turntable 21;
the housing 8 is of a conical structure, the left section is a circular tube, the middle section is a conical shell, the right section is a ring body, the left end is a small end, the right end is a large end, an inner hole of the ring body is a conical through hole, the taper of the conical through hole is the same as that of the conical thin-wall part 13, and the conical through hole is in contact with the outer side surface of the large end of the conical thin-wall part 13 and is used for radial positioning and axial positioning of the large end of the conical thin-wall part 13; the right end surface of the ring body is fixedly connected with the pressing block 14; the pressing block 14 simultaneously presses the large end face of the conical thin-wall part 13;
The inner hole of the circular tube is matched with a tail tip cone 9 hole shaft; the lead screw nut 7 is fixedly arranged at the left end of the tail tip cone 9; the left end of the housing 8 is fixedly connected with the lead screw seat 4, and the left end of the lead screw seat 4 is fixedly connected with the handle seat 3;
a boss is arranged in the middle of the screw rod 1, the screw rod 1 on the left side of the boss is a polished rod, and the screw rod 1 on the right side of the boss is a threaded rod; the right section of the screw rod 1 is in threaded connection with a screw rod nut 7; a spring 6, a thrust bearing 5, a lead screw seat 4 and a cover plate 2 are sequentially arranged on the left section of the lead screw 1 from right to left; the spring 6 is used for buffering the conical thin-wall part 13 in the installation process; the handle seat 3 is a round pipe body, and the inner side of the round pipe body is connected with the outer side of the cover plate 2;
four radial through holes are uniformly distributed in the screw seat 4 along the circumferential direction, an annular groove is formed in the position, corresponding to the radial through holes, of the screw 1, the shape and the size of the annular groove enable half of the balls 18 to fall into the annular groove, and the balls 18 fall into the annular groove of the screw 1 from the radial through holes of the screw seat 4 by means of gravity to lock the position of the screw 1; the tail of the screw rod 1 is provided with a square seat, and the screw rod 1 is rotated by rotating the square seat through a wrench; the length of the radial through hole is smaller than the diameter of the ball 18.
The left end of the housing 8 is connected with the rotary table 21 through a three-jaw chuck and used for controlling circumferential rotation of the housing 8. The right end of the cover 8 is arranged on the center frame, and the slide block 20 on the center frame is moved to adjust the axis position of the cover 8 so as to adjust the axis position of the conical thin-wall part 13.
Furthermore, the central hole of the screw rod seat 4 is three sections of stepped circular holes, the circular hole at the left section has the smallest diameter and is matched with the screw rod 1, the thrust bearing 5 is installed in the circular hole at the middle section, and the circular hole at the right section has the largest diameter; the end face of the right end of the screw rod seat 4 is a two-stage annular end face, and the annular end face of the outer side is in contact positioning with the end face of the small end of the housing 8;
the outer side surface of the screw rod seat 4 is a three-section stepped cylindrical surface, the left section of the cylindrical surface has the smallest diameter and is connected with the inner side of a middle section of a round hole of the handle seat 3, the middle section of the cylindrical surface is connected with the inner side of a right section of the round hole of the handle seat 3, and a middle annular end surface at the left end of the screw rod seat 4 is connected with an inner annular end surface at the right end of the handle seat 3; the diameter of the right section cylindrical surface is maximum;
the central hole of the handle seat 3 is three sections of stepped round holes, and the round hole at the middle section has the smallest diameter and is used for being matched and connected with the outer side of the screw rod seat 4 and the outer side of the right section of the cover plate 2 at the same time; the diameter of the round hole of the left section is larger than that of the middle section, and the round hole is used for matching connection of the outer side of the left section of the cover plate 2; the diameter of the round hole at the right section is the largest and is used for being matched and connected with the outer side of the middle section of the screw rod seat 4; four semicircular grooves are uniformly distributed on the inner side of the handle seat 3 along the circumferential direction, the shape and the size of each semicircular groove are the same as those of a half of the ball 18, and when the circumferential position of each semicircular groove is the same as that of the four radial through holes of the lead screw seat 4, the ball 18 enters the four semicircular grooves of the handle seat 3 through the four radial through holes of the lead screw seat 4.
Further, four threaded holes are formed in the left end face of the lead screw seat 4 along the circumferential direction; four stepped holes are formed in the large end face of the lead screw seat 4 along the circumferential direction and used for installing bolts B17, and the lead screw seat 4 is fixedly connected with the housing 8 through bolts B17. The cover plate 2 is circumferentially provided with four axial through holes for connecting with four threaded holes of the lead screw seat 4 through bolts C19; after the cover plate 2 and the lead screw seat 4 are connected, the boss of the cover plate 2 and the boss of the lead screw seat 4 extrude the handle seat 3 in the middle, and the axial positioning of the handle seat 3 is completed.
Further, a threaded through hole is formed in the inner side of the lead screw nut 7 and is used for being in threaded fit with the lead screw 1; a boss is arranged at the left end of the outer side of the screw nut 7 and is in contact positioning with the tail tip cone 9; two through holes are formed in the left end face of the screw nut 7 and used for fixedly connecting the screw nut 7 and the tail tip cone 9 through a bolt A16.
Furthermore, the right end of the tail tip cone 9 is provided with a conical through hole, the conical degree of the conical through hole is larger than that of the conical thin-wall part 13, and the conical through hole is in contact positioning with the left end of the conical thin-wall part 13 and is used for axial and radial positioning of the conical thin-wall part 13; and a rectangular key groove is formed in the outer side of the tail tip cone 9.
Furthermore, a radial thread through hole is formed in the left section of the housing 8, a guide bolt 15 is installed in the radial thread through hole, and the inner end of the guide bolt 15 is in contact with the rectangular groove of the tail tip cone 9 and used for axial guiding of the tail tip cone 9.
Furthermore, a plurality of auxiliary supporting devices are arranged in the conical shell at the middle section of the housing 8, each auxiliary supporting device comprises a screw 10, a nut 11 and a supporting body 12, the nut 11 is welded and fixed on the housing 8, the outer end of the screw 10 is in threaded connection with the nut 11, and the inner end of the screw 10 is connected with the supporting body 12 through a spherical hinge; the inner end of the support body 12 is in contact with a conical thin-walled part 13.
Furthermore, the auxiliary supporting device is provided with three groups along the axial direction of the conical shell, and each group is provided with three groups along the circumferential direction.
Furthermore, flexible gaskets are arranged among the support body 12, the tail tip cone 9, the housing 8, the pressing block 14 and the conical thin-wall part 13 and used for preventing the conical thin-wall part 13 from being damaged in the positioning process.
A positioning method of a conical thin-wall part utilizes a conical thin-wall part tool to position, and comprises the following steps:
A. for axial and radial positioning of the conical thin-walled part 13
A1, horizontally placing the conical thin-wall part 13 and slowly feeding the conical thin-wall part into the horizontally placed housing 8, wherein the ball end of the conical thin-wall part 13 is firstly contacted with the conical through hole at the right end of the tail tip cone 9;
a2 and a tail tip cone 9 drive a lead screw 1 to compress a spring 6 to move left continuously through a lead screw nut 7 until the outer side surface of the large end of a conical thin-wall part 13 is contacted with a conical through hole of a right section of a circular ring body of a housing 8 to realize self locking;
A3, the axial positions of the annular groove on the lead screw 1 are exactly the same as the axial positions of the four radial through holes on the inner side of the lead screw seat 4, and half of the balls 18 in the radial through holes fall into the annular groove on the lead screw 1 under the action of gravity, and the other half of the balls are positioned in the radial through holes of the lead screw seat 4;
a4, rotating the handle base 3 to stagger the circumferential positions of the four semicircular grooves of the handle base 3 and the positions of the four radial through holes of the lead screw base 4, so that the ball bearings 18 are clamped between the annular groove of the lead screw 1 and the radial through holes of the lead screw base 4, and the axial position of the lead screw 1 is locked;
a5, rotating the pressing block 14 to press the conical thin-wall part 13 on the large end face of the conical thin-wall part 13, and completing the axial and radial positioning of the conical thin-wall part 13.
B. Auxiliary positioning of the conical thin-walled part 13 is carried out
Sequentially screwing the screws 10 in each auxiliary supporting device to ensure that the supporting body 12 is fully contacted with the outer side surface of the conical thin-wall part 13, and completing auxiliary positioning of the conical thin-wall part 13;
C. centering 13 axes of conical thin-wall part
The three-jaw chuck on the rotary table 21 is in a loosening state, the sliding block 20 on the center frame is moved, the axis position of the conical thin-wall part 13 is the same as the axis position of the machine tool spindle by adjusting the axis position of the housing 8, the three-jaw chuck is locked, and the position of the housing 8 is fixed; the conical thin-wall part 13 is rotated along the axis by rotating a three-jaw chuck on the rotary table 21 so as to meet different measurement and processing poses;
D. Disassembly of row-tapered thin-walled parts 13
After the conical thin-wall part 13 is machined, the three-jaw chuck on the rotary table 21 is loosened to separate the housing 8 from the rotary table 21, the screw 10 in the auxiliary supporting device is loosened to separate the supporting body 12 from the outer side surface of the conical thin-wall part 13, the pressing block 14 is rotated to be positioned at a position avoiding the axial movement of the large end surface of the conical thin-wall part 13, the square base at the tail part of the screw rod 1 is rotated through a spanner, torque is applied to rotate the screw rod 1, the screw rod nut 7 is driven to move axially through the rotation of the screw rod 1, and the tail end cone 9 moves linearly to push the conical thin-wall part 13 out of the housing 8.
E. Resetting of the screw 1
The handle seat 3 is rotated to enable the circumferential positions of the four semicircular grooves on the inner side of the handle seat 3 to be the same as the circumferential positions of the four radial through holes of the screw seat 4, the screw 1 is driven to do linear motion under the action of the spring 6, the balls 18 enter the four semicircular grooves of the handle seat 3 through half of the four radial through holes of the screw seat 4 under the pushing action of the annular groove of the screw 1, and the screw 1 continues to do linear motion until resetting.
The left-right direction of the present invention is only relative to fig. 1, and does not limit the present invention in any way.
The present invention is not limited to the embodiment, and any equivalent idea or change within the technical scope of the present invention is to be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a toper thin wall part frock which characterized in that: the device comprises a screw rod (1), a cover plate (2), a handle seat (3), a screw rod seat (4), a thrust bearing (5), a spring (6), a screw rod nut (7), a housing (8), a tail tip cone (9), a support body (12), a pressing block (14), a guide bolt (15), a ball (18), a sliding block (20) and a rotary table (21);
the housing (8) is of a conical structure, the left section is a circular tube, the middle section is a conical shell, the right section is a ring body, the left end is a small end, the right end is a large end, an inner hole of the ring body is a conical through hole, the taper of the conical through hole is the same as that of the conical thin-wall part (13), and the conical through hole is in contact with the outer side surface of the large end of the conical thin-wall part (13) and is used for radial positioning and axial positioning of the large end of the conical thin-wall part (13); the right end surface of the circular ring body is fixedly connected with a pressing block (14); the pressing block (14) simultaneously presses the large end face of the conical thin-wall part (13);
the inner hole of the circular tube is matched with the hole shaft of the tail tip cone (9); the screw rod nut (7) is fixedly arranged at the left end of the tail tip cone (9); the left end of the housing (8) is fixedly connected with the screw rod seat (4), and the left end of the screw rod seat (4) is fixedly connected with the handle seat (3);
a boss is arranged in the middle of the screw rod (1), the screw rod (1) on the left side of the boss is a polished rod, and the screw rod (1) on the right side of the boss is a threaded rod; the right section of the screw rod (1) is in threaded connection with a screw rod nut (7); a spring (6), a thrust bearing (5), a screw rod seat (4) and a cover plate (2) are sequentially arranged on the left section of the screw rod (1) from right to left; the spring (6) is used for buffering the conical thin-wall part (13) in the installation process; the handle seat (3) is a circular tube, and the inner side of the circular tube is connected with the outer side of the cover plate (2);
Four radial through holes are uniformly distributed in the screw seat (4) along the circumferential direction, an annular groove is formed in the position, corresponding to the radial through holes, of the screw (1), the shape and the size of the annular groove enable half of the balls (18) to fall into the annular groove, the balls (18) fall into the annular groove of the screw (1) from the radial through holes of the screw seat (4) by means of gravity, and the position of the screw (1) is locked; the tail of the screw rod (1) is provided with a square seat, and the screw rod (1) is rotated by rotating the square seat through a wrench; the length of the radial through hole is smaller than the diameter of the ball (18);
the left end of the housing (8) is connected with the rotary table (21) through a three-jaw chuck and used for controlling the circumferential rotation of the housing (8); the right end of the cover shell (8) is installed on the center frame, and the axis position of the cover shell (8) is adjusted by moving a sliding block (20) on the center frame, so that the axis position of the conical thin-wall part (13) is adjusted.
2. The tapered thin-walled part tool according to claim 1, characterized in that: the central hole of the screw rod seat (4) is three sections of stepped circular holes, the diameter of the circular hole at the left section is the smallest and is matched with the screw rod (1), the thrust bearing (5) is installed on the circular hole at the middle section, and the diameter of the circular hole at the right section is the largest; the end face of the right end of the screw rod seat (4) is a two-stage annular end face, and the annular end face on the outer side is in contact positioning with the end face of the small end of the housing (8);
The outer side surface of the screw rod seat (4) is three sections of stepped cylindrical surfaces, the left section of cylindrical surface has the smallest diameter and is connected with the inner side of a middle section of round hole of the handle seat (3), the middle section of cylindrical surface is connected with the inner side of a right section of round hole of the handle seat (3), and a middle annular end surface at the left end of the screw rod seat (4) is connected with an inner annular end surface at the right end of the handle seat (3); the diameter of the right section cylindrical surface is maximum;
the central hole of the handle seat (3) is three sections of stepped round holes, the diameter of the round hole at the middle section is the smallest, and the stepped round holes are used for being matched and connected with the outer side of the screw rod seat (4) and the outer side of the right section of the cover plate (2) at the same time; the diameter of the round hole of the left section is larger than that of the middle section, and the round hole is used for matching connection of the outer side of the left section of the cover plate (2); the diameter of the round hole at the right section is the largest and is used for being matched and connected with the outer side of the middle section of the screw rod seat (4); four semicircular grooves are uniformly distributed on the inner side of the handle seat (3) along the circumferential direction, the shape and the size of each semicircular groove are the same as those of one half of the ball (18), and when the circumferential position of each semicircular groove is the same as that of the four radial through holes of the screw rod seat (4), the ball (18) enters the four semicircular grooves of the handle seat (3) through the four radial through holes of the screw rod seat (4).
3. The tapered thin-walled part tool according to claim 1, characterized in that: four threaded holes are formed in the left end face of the lead screw seat (4) along the circumferential direction; four stepped holes are formed in the large end face of the screw rod seat (4) along the circumferential direction and used for mounting bolts B (17), and the screw rod seat (4) is fixedly connected with the housing (8) through the bolts B (17); the cover plate (2) is circumferentially provided with four axial through holes for connecting with four threaded holes of the screw rod seat (4) through bolts C (19); after the cover plate (2) and the screw rod seat (4) are connected, the handle seat (3) is extruded in the middle by the bosses of the cover plate (2) and the screw rod seat (4), and the axial positioning of the handle seat (3) is completed.
4. The tapered thin-walled part tool according to claim 1, characterized in that: the inner side of the screw nut (7) is provided with a threaded through hole for being in threaded fit with the screw (1); a boss is arranged at the left end of the outer side of the screw nut (7), and the boss is in contact positioning with the tail tip cone (9); the left end face of the screw nut (7) is provided with two through holes for fixedly connecting the screw nut (7) and the tail tip cone (9) through a bolt A (16).
5. The tapered thin-walled part tool according to claim 1, characterized in that: the right end of the tail tip cone (9) is provided with a conical through hole, the conical degree of the conical through hole is larger than that of the conical thin-wall part (13), and the conical through hole is in contact positioning with the left end of the conical thin-wall part (13) and is used for axial and radial positioning of the conical thin-wall part (13); the outer side of the tail tip cone (9) is provided with a rectangular key groove.
6. The tapered thin-walled part tool according to claim 1, characterized in that: the left section of the housing (8) is provided with a radial thread through hole, a guide bolt (15) is installed in the radial thread through hole, and the inner end of the guide bolt (15) is in contact with the rectangular groove of the tail tip cone (9) and used for axial guiding of the tail tip cone (9).
7. The tapered thin-walled part tool according to claim 1, characterized in that: a plurality of auxiliary supporting devices are arranged in a conical shell at the middle section of the housing (8), each auxiliary supporting device comprises a screw (10), a nut (11) and a supporting body (12), the nuts (11) are welded and fixed on the housing (8), the outer ends of the screws (10) are in threaded connection with the nuts (11), and the inner ends of the screws (10) are connected with the supporting bodies (12) through spherical hinges; the inner end of the supporting body (12) is contacted with the conical thin-wall part (13).
8. The tapered thin-walled part tool according to claim 1, characterized in that: the auxiliary supporting device is provided with three groups along the axial direction of the conical shell, and each group is provided with three groups along the circumferential direction.
9. The tapered thin-walled part tool according to claim 1, characterized in that: and flexible gaskets are arranged among the support body (12), the tail tip cone (9), the housing (8), the pressing block (14) and the conical thin-wall part (13) and used for preventing the conical thin-wall part (13) from being damaged in the positioning process.
10. A positioning method of a conical thin-wall part utilizes a conical thin-wall part tool to perform positioning, and is characterized in that: the method comprises the following steps:
A. performing axial and radial positioning of a conical thin-walled part (13)
A1, horizontally placing the conical thin-wall part (13) and slowly feeding the conical thin-wall part into a horizontally placed housing (8), wherein the ball end of the conical thin-wall part (13) is firstly contacted with a conical through hole at the right end of the tail tip cone (9);
a2, a tail tip cone (9) drives a lead screw (1) to compress a spring (6) to move left continuously through a lead screw nut (7) until the outer side surface of the large end of a conical thin-wall part (13) is contacted with a conical through hole of a right section of a ring body of a housing (8) to realize self-locking;
a3, the axial positions of the annular groove on the screw (1) are exactly the same as the axial positions of the four radial through holes on the inner side of the screw seat (4), and half of the balls (18) in the radial through holes fall into the annular groove on the screw (1) under the action of gravity, and the half of the balls are positioned in the radial through holes of the screw seat (4);
A4, rotating the handle seat (3) to stagger the circumferential positions of four semicircular grooves of the handle seat (3) and the positions of four radial through holes of the screw rod seat (4), so that balls (18) are clamped between the annular groove of the screw rod (1) and the radial through holes of the screw rod seat (4), and the axial position of the screw rod (1) is locked;
a5, pressing the conical thin-wall part (13) on the large end surface of the conical thin-wall part (13) by a rotary pressing block (14) to complete the axial and radial positioning of the conical thin-wall part (13);
B. auxiliary positioning of the conical thin-walled part (13)
Sequentially screwing down the screws (10) in each auxiliary supporting device to ensure that the supporting body (12) is fully contacted with the outer side surface of the conical thin-wall part (13) to complete auxiliary positioning of the conical thin-wall part (13);
C. alignment of the axis of the conical thin-wall part (13)
The three-jaw chuck on the rotary table (21) is in a loose state, a sliding block (20) on the center frame is moved, the axis position of the conical thin-wall part (13) is the same as the axis position of a machine tool spindle by adjusting the axis position of the housing (8), the three-jaw chuck is locked, and the position of the housing (8) is fixed; the conical thin-wall part (13) is rotated along the axis by rotating a three-jaw chuck on the rotary table (21) so as to meet different measurement and processing poses;
D. Carrying out the disassembly of the conical thin-walled part (13)
After the conical thin-wall part (13) is machined, a three-jaw chuck on a rotary table (21) is loosened, a housing (8) is separated from the rotary table (21), a screw (10) in an auxiliary supporting device is loosened, a supporting body (12) is separated from the outer side surface of the conical thin-wall part (13), a pressing block (14) is rotated to be located at a position avoiding the axial movement of the large end surface of the conical thin-wall part (13), a square base at the tail of a screw rod (1) is rotated through a spanner, torque is applied to rotate the screw rod (1), a screw rod nut (7) is driven to do axial movement through the rotational movement of the screw rod (1), and a tail tip cone (9) does linear movement to push the conical thin-wall part (13) out of the housing (8);
E. resetting of the screw (1)
The handle seat (3) is rotated, the circumferential positions of four semicircular grooves in the inner side of the handle seat (3) are the same as the circumferential positions of four radial through holes of the screw seat (4), the screw (1) is driven to do linear motion under the action of the spring (6), the balls (18) enter the four semicircular grooves of the handle seat (3) through half of the four radial through holes of the screw seat (4) under the pushing action of the annular groove of the screw (1), and the screw (1) continues to do linear motion until resetting.
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| CN202210273307.3A CN114749969B (en) | 2022-03-18 | 2022-03-18 | Conical thin-wall part tool and positioning method |
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| CN202210273307.3A CN114749969B (en) | 2022-03-18 | 2022-03-18 | Conical thin-wall part tool and positioning method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116900834A (en) * | 2023-09-04 | 2023-10-20 | 唐山友缘科技有限公司 | Self-positioning type coupling polishing device with rotation centering function |
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| CN114749969B (en) | 2023-06-02 |
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