CN114876968B - Connecting structure of positioning cone - Google Patents

Connecting structure of positioning cone Download PDF

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Publication number
CN114876968B
CN114876968B CN202210811973.8A CN202210811973A CN114876968B CN 114876968 B CN114876968 B CN 114876968B CN 202210811973 A CN202210811973 A CN 202210811973A CN 114876968 B CN114876968 B CN 114876968B
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Prior art keywords
cone
positioning
positioning cone
section
hole
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CN202210811973.8A
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CN114876968A (en
Inventor
陈素玲
李艳丽
蒋文娟
杜娟
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Sichuan Engineering Technical College
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Sichuan Engineering Technical College
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/64—Movable or adjustable work or tool supports characterised by the purpose of the movement
    • B23Q1/66—Worktables interchangeably movable into operating positions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)

Abstract

The application discloses a connecting structure of a positioning cone, which relates to the technical field of high-speed rotor dynamics and comprises the positioning cone and a rotating body, wherein the positioning cone comprises a cone section and a cylinder section along the axis direction of the positioning cone; the first end of the rotating body is provided with a matching hole, the outline of the outer surface of the first end of the rotating body is matched with the outline of the outer conical surface of the conical section, and the cylindrical section is inserted into the matching hole and is in interference fit with the matching hole; the second end of the rotating body is used for connecting a rotating shaft of the high-speed machine tool. This application is through setting up the transmission that location awl and rotator realized location awl, work piece and high-speed lathe pivot, avoids bolt structure to introduce and reduce the holistic inseparable and stable of structure, and the pyramis of circular cone section is used for and waits to process work piece terminal surface friction, realizes the location centering, through the interference fit of rotator and cylinder section, realizes rubbing steadily and passes the turn round, compromises the reliability of location awl location and passes the stability of turning round.

Description

Connecting structure of positioning cone
Technical Field
The application relates to the technical field of high-speed rotor dynamics, in particular to a connecting structure of a positioning cone.
Background
The high-speed rotating positioning cone is a key part for processing the exchange positioning of the slender shaft type part workbench and is a key link for ensuring the precision of a machine tool. The existing positioning cone is connected with a high-speed rotor of a machine tool in a mode of adopting a bolt flange or a radial bolt, but the anti-loosening performance of the two modes is poor, the mode of the bolt flange easily causes structural damping change and fatigue failure, the mode of adopting the radial bolt easily generates sliding threads, the connection of the positioning cone and the high-speed rotor of the machine tool is unstable due to the above conditions, and then the positioning cone is reduced in reliability and poor in torque transmission stability.
Disclosure of Invention
The application provides a main aim at provides a connection structure of location awl, aims at solving the poor problem of biography of location awl torsion stability among the prior art.
The technical scheme adopted by the application is as follows:
the utility model provides a connection structure of location awl, includes the rotator that is used for being connected with the location awl, and the mating holes is seted up to the first end of rotator, wherein:
the positioning cone comprises a cone section and a cylinder section which are distributed along the axial direction of the positioning cone, the first end of the cylinder section is coaxially connected with the large-diameter end of the cone section, and the diameter of the cylinder section is smaller than that of the large-diameter end of the cone section; the cylindrical section is provided with an annular groove, so that an annular limiting block is formed at one end of the cylindrical section close to the rotating body, the hole wall of the matching hole extends towards the direction close to the axis of the positioning cone and forms a clamping section, and the clamping section is matched with the annular groove; the annular limiting block is provided with three notches to form three limiting block bodies, and the three limiting block bodies are distributed in an annular array around the axis of the positioning cone;
the outer surface profile of the first end of the rotating body is matched with the outer conical surface profile of the conical section, and the cylindrical section is inserted into the matching hole and is in interference fit with the matching hole; the second end of the rotating body is used for connecting a rotating shaft of the high-speed machine tool.
Optionally, the connecting structure further includes a pin, a positioning hole is formed in one surface, close to the positioning cone, of the clamping section, a limiting hole is formed in the large-diameter end of the cone section, the axis of the limiting hole and the axis of the positioning hole are parallel to the axis of the positioning cone, the limiting hole penetrates through the cone section, one end of the pin is inserted into the limiting hole from one end, far away from the rotating body, of the limiting hole, and the positioning hole is inserted after the limiting hole is penetrated.
Optionally, the pin sets up a plurality ofly, and the quantity of locating hole and spacing hole all is unanimous with the quantity of pin, and a plurality of pins are the annular array around the axis of location awl and distribute.
Optionally, a rotating groove is formed in a groove surface, close to the axis of the positioning cone, of the annular groove, a protruding block is arranged on one surface, close to the axis of the positioning cone, of the clamping section, and the protruding block is matched with the rotating groove.
Optionally, the roundness of the groove surface of the annular groove close to the axis of the positioning cone is less than or equal to 0.012 mm.
Optionally, the perpendicularity of the large-diameter end surface of the conical section relative to the axis of the positioning cone is less than or equal to 0.01.
Optionally, the positioning cone and the inner part of the rotating body are respectively provided with a cavity with a shape matched with the shape of the positioning cone and the rotating body.
Optionally, the second end of the rotating body is provided with a mounting hole, the axis of the mounting hole coincides with the axis of the positioning cone, and the size of the mounting hole is matched with the rotating shaft of the high-speed machine tool.
Compared with the prior art, the beneficial effect of this application is:
the embodiment of the application provides a connection structure of location awl, realize the location awl through setting up location awl and rotator, the transmission of work piece and high-speed lathe pivot, avoided bolt structure to introduce and reduced the holistic inseparable and stable of structure, the location awl has included cone section and cylinder section, the pyramis of cone section is used for rubbing with the work piece terminal surface of waiting to process, realize the location centering, under the condition that location awl barycenter radius reduces, make the work inertia moment and the unbalanced response under the high rotational speed work all reduce, the cylinder section inserts the mating holes of rotator and realizes interference fit, the second end of rotator is used for connecting the high-speed lathe pivot, under the drive of pivot, between rotator and the location awl, through the interference fit of rotator and cylinder section, realize the friction and pass the torsion steadily, the reliability of location awl location and the stability of passing the torsion have been taken into account.
Drawings
Fig. 1 is a schematic structural diagram of a connection structure of a positioning cone provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a connection structure of a positioning cone provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a positioning cone in a connection structure of the positioning cone provided in an embodiment of the present application;
FIG. 4 is a schematic side view of a positioning cone in a connecting structure of the positioning cone according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a rotating body in a connecting structure of a positioning cone according to an embodiment of the present disclosure;
the reference numbers in the figures indicate:
1-positioning cone, 11-conical section, 111-limiting hole, 12-cylindrical section, 121-annular limiting block, 1211-limiting block body, 1212-notch, 122-rotating groove, 2-rotating body, 21-clamping section, 211-positioning hole and 22-mounting hole.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicators are correspondingly changed.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is 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" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the prior art, connecting structures such as a bolt flange, a radial bolt, an outer snap ring and the like are generally adopted between a positioning cone and a high-speed rotor of a machine tool; the bolt flange connection structure is simple and good in operability, but when the bolt flange connection structure is subjected to impact external force or bolt pretightening force, stress concentration and deformation can be generated, certain influence is caused on the connection reliability, structural damping change is easily caused due to friction between flange pieces, the anti-loosening performance is poor, and even fatigue failure can be caused; the radial bolt connection has the characteristics of simple structure, small size and convenient assembly, but is easy to generate thread slipping and has poor anti-loosening performance; the outer snap ring type connecting structure has the advantages of convenience in mounting and dismounting and small occupied internal space, and the connecting force and the connecting rigidity which can be borne by the outer snap ring type connecting structure are small.
Therefore, in order to meet the requirements of compactness, reliability and stable torque transmission of connection between high-speed rotors, the embodiment of the application provides a connection structure of a positioning cone to achieve the above purpose, and with reference to fig. 1 to 5, the connection structure comprises a rotating body 2 for connecting with the positioning cone 1, wherein the positioning cone 1 comprises a conical section 11 and a cylindrical section 12 distributed along the axial direction of the positioning cone, a first end of the cylindrical section 12 is coaxially connected with a large-diameter end of the conical section 11, and the diameter of the cylindrical section 12 is smaller than that of the large-diameter end of the conical section 11; a matching hole is formed in the first end of the rotating body 2, the outline of the outer surface of the first end of the rotating body 2 is matched with the outline of the outer conical surface of the conical section 11, and the cylindrical section 12 is inserted into the matching hole and is in interference fit with the matching hole; the second end of the rotating body 2 is used for connecting a rotating shaft of a high-speed machine tool.
In this embodiment, it should be noted that the first end and the second end of the component described in the embodiments of the present application are based on the directions shown in fig. 2, and the end of the component on the left side is the first end thereof, and the end on the right side is the second end thereof. In the embodiment of the application, the positioning cone 1 and the rotating body 2 form a connecting structure and are used for transmission between a rotating shaft of a high-speed machine tool and shaft parts to be machined, the positioning cone 1 comprises the cylindrical section 12 and the conical section 11, the conical section 11 is used for being abutted against the axial end face of the part in machining, and the working inertia moment and the unbalanced response can be reduced under the high-speed rotating working condition under the condition that the center of mass radius of the positioning cone 1 is reduced; and (3) torque transmission is carried out under rotation, if the part to be processed is not coaxial with the conical section 11, sliding is formed between the end surface and the conical section 11 in the rotating process until the part is coaxial with the positioning cone, eccentric transfer is not generated in synchronous rotation, self-positioning centering of the rotating shaft and the positioning cone is realized, and the torque transmission can be stabilized. The rotating body 2 is in interference fit with the cylindrical section 12 through the matching hole, and more specifically, under the interference fit, the circumferential ring surface of the cylindrical section 12 and the contact part of the rotating body 2 realize stable friction torque transmission, can stably output and transmit power of a rotating shaft of a high-speed machine tool, and drives a part to be processed to rotate so as to realize high-precision positioning processing.
In addition, the embodiment of this application still provides a connection structure, including being used for 2 the rotator of being connected with location awl 1 to and above-mentioned location awl 1, rotator 2 can adopt the buckle that sets up the symmetry, and it is spacing to realize the joint through buckle and location awl 1, and realize the fastening installation through interference fit's mode after spacing. The rotating body 2 can also grind the side surface thereof so as to form a flat annular surface on the surface of the curved surface thereof for clamping and positioning. The positioning cone 1 may be conical as in the foregoing embodiment, or may be provided with a butt-joint hole at an end portion, the axial size of which matches that of the part to be machined, and the part to be machined can be coaxially arranged with the positioning cone 1 by approaching the butt-joint hole. The cone part of the positioning cone 1 can be chamfered to form a smooth end part, so that the end surface of a workpiece is prevented from being damaged during friction positioning.
In an embodiment, as shown in fig. 2 and fig. 3, in order to make the friction torque transmission more stable, an annular groove is provided on the cylindrical section 12, so that an annular limiting block 121 is formed at one end of the cylindrical section 12 close to the rotating body 2, a hole wall of the fitting hole extends in a direction close to the axis of the positioning cone 1, and a clamping section 21 is formed, and the clamping section 21 is fitted with the annular groove. In the embodiment, the bolt is prevented from loosening in high-speed rotation due to the introduction of a bolt structure, the torque transmission stability is reduced, and on one hand, the positioning cone 1 and the rotating body 2 can be limited in the axial direction and the radial direction in a clamping manner by arranging the clamping section 21 to be clamped with the annular groove, so that the positioning cone 1 and the rotating body 2 are matched more tightly; on the other hand rotator 2 has bigger contact surface area with cylinder section 12, can have bigger friction to pass under interference fit and turn round the face, and the friction is passed and is turned round both to the anchor joint section 21 of accessible rotator 2 and the anchor ring of cylinder section 12, still can realize supplementary biography with the terminal surface that annular stopper 121 is close to the ring channel through the terminal surface of anchor joint section 21 and turn round, has promoted the biography of location awl 1 and rotator 2 and has turned round stability.
In an embodiment, in order to enable the rotating body 2 to be accurately installed in a butt joint with the positioning cone 1 and ensure the stability of the rotation torque transmission, a circumferential limit is arranged for the connecting structure of the positioning cone, specifically, the connecting structure further comprises a pin, a positioning hole 211 is formed in one surface, close to the positioning cone 1, of the clamping section 21, a limiting hole 111 is formed in the large-diameter end of the conical section 11, the axes of the limiting hole 111 and the positioning hole 211 are parallel to the axis of the positioning cone 1, the limiting hole 111 penetrates through the conical section 11, one end of the pin is inserted into the limiting hole 111 through one end, far away from the rotating body 2, of the limiting hole 111, and the positioning hole 211 is inserted after the limiting hole 111 is penetrated. The hole that matches in position is seted up through the major diameter end at conical segment 11 and rotator 2 and is realized circumferential location, can confirm the butt joint condition of rotator 2 and location awl 1 through confirming spacing hole 111 and locating hole 211's coincidence degree when the assembly, it is spacing to realize the contact cooperation through inserting the pin after good to improve the precision of circumference location, and then make this application can more accurate location work piece and keep good biography to turn round when using.
Further, for making the spacing distribution of circumference even, the barycenter of keeping structure does not deviate the axis, it is good to transmit and turn round stability, sets up the pin a plurality ofly, and the quantity of locating hole 211 and spacing hole 111 all is unanimous with the quantity of pin, and a plurality of pins are annular array distribution around the axis of location awl 1, guarantees not influence positioning accuracy because of impact and alternating load in circumference when guaranteeing the friction transmission and turn round. As shown in fig. 4, which shows the structure when three sets of pins are provided, the three corresponding positioning holes 211 and the three limiting holes 111 are distributed in an annular array at intervals of 120 degrees around the axis of the positioning cone 1.
In an embodiment, as shown in fig. 4, after a space geometric structure is analyzed through a rotor dynamic characteristic, after the cylindrical section 12 and the annular groove are designed, a limiting block structure which meets requirements and is uniformly distributed is correspondingly arranged according to an interference fit interference range from-0.005 mm to-0.015 mm, specifically, three notches 1212 are formed in the annular limiting block 121 to form three limiting block bodies 1211, and the three limiting block bodies 1211 are distributed in an annular array around an axis of the positioning cone.
In one embodiment, as shown in fig. 3, in order to make the connection between the rotating body 2 and the positioning cone 1 more stable and the detachment more convenient, a rotating groove 122 is formed on the groove surface of the annular groove close to the axis of the positioning cone 1, and a protrusion is provided on the surface of the clamping section 21 close to the axis of the positioning cone 1, and the protrusion is engaged with the rotating groove 122. As set up above, realize the spacing butt joint of rotator 2 and location awl 1 through the cooperation of rotating groove 122 and lug to can follow and rotate the groove rotation, can set up unidirectional rotatory locking structure here, through set up complex groove and key in some positions, make rotator 2 and location awl 1, and can be after rotating certain angle relatively, contact groove and key's cooperation makes the unable separation of the two.
In one embodiment, as shown in fig. 1, fig. 3 and fig. 5, in order to reduce the overall weight and avoid the excessive inertia of the transmission component during the transmission process, cavities with shapes matched with the shapes of the positioning cone 1 and the rotating body 2 are respectively arranged inside the positioning cone 1 and the rotating body 2, and the existence of the cavities can also ensure that the rotating body 2 and the positioning cone 1 have enough internal space for operation when being matched.
In one embodiment, as shown in fig. 2 and 5, a matching mode with a rotating shaft of a high-speed machine tool is provided, wherein a mounting hole 22 is formed in the second end of the rotating body 2, the axis of the mounting hole 22 coincides with the axis of the positioning cone 1, and the size of the mounting hole 22 is matched with that of the rotating shaft of the high-speed machine tool; in specific implementation, the mounting hole 22 may be in interference fit with a rotating shaft of a machine tool to achieve stable connection, or may be set to be in flat-square connection while adopting a clearance fit manner, so as to avoid relative rotation between the mounting hole and the rotating shaft of the machine tool, and improve stability of torque transmission.
Based on the same inventive concept as the previous embodiment, the embodiment of the present application further provides a method for constructing a connecting structure of a positioning cone, including the following steps:
s1: constructing a positioning cone 1;
in the specific implementation process, in order to meet the requirement of exchange positioning of the workbench when slender shaft parts are machined, a space curved surface type design method is adopted to design an axisymmetric conical curved surface which accords with high-precision machining positioning of the end face of a workpiece, namely the positioning cone 1.
S2: constructing a rotating body 2;
in the specific implementation process, according to the curved surface shape of the positioning cone 1 obtained in the step S1, the rotating body 2 matched with the positioning cone is designed according to the requirements of space structure geometric constraint and strength fracture reserve coefficient.
S3: constructing an annular groove;
in the specific implementation process, according to the overall space geometric structure, the annular groove is designed through rotor dynamics characteristic analysis, and friction torque transmission and contact type radial positioning are realized through interference fit of the groove surface of the annular groove and the rotating body 2.
S4: constructing a limit structure;
in the specific implementation process, based on the annular groove constructed in S3, an annular limiting block 121 is designed at one end, close to the rotating body 2, of the cylindrical section 12, and is used for friction-assisted torque transmission and axial limiting of the end face, meanwhile, in order to ensure that the circumferential direction does not influence the positioning accuracy due to impact and alternating load, corresponding limiting holes 111 and positioning holes 211 are formed in the positioning cone 1 and the rotating body 2, and circumferential positioning and fastening are achieved through matching of pins and the two holes.
Specifically, the construction method is further explained according to the actual situation and by combining the specific parameters:
firstly, designing a structure of a positioning cone 1 according to S1;
secondly, designing a space geometric structure of the overall positioning cone 1 and the rotating body 2 according to the designed structure of the positioning cone 1 and the requirements that the space structure geometric constraint and the strength rupture reserve coefficient are more than or equal to 1.30;
then, according to the overall space geometry structure, through rotor dynamics characteristic analysis, a radial annular groove with the transient maximum bearing power more than or equal to 150KW and the critical strain energy less than or equal to 20% is designed, the annular groove and the rotating body are in interference fit with each other with the interference range of-0.005-mm-0.015 mm, a rotating groove 122 is formed in the annular groove, the diameter of the annular groove of the rotating groove 122 is 2.5 mm, and when the rotating grooves 122 are arranged in two groups, the groove interval is 3 mm. In order to ensure the tightness of the matching surface, the roundness of the groove surface of the annular groove close to the axis of the positioning cone 1 is less than or equal to 0.012 mm.
Finally, based on the result of the S3 design and based on the triangle stabilization concept, three notches 1212 are designed on the annular stopper 121 at one end of the cylindrical section 12 to form three stopper bodies 1211 which mutually form 120 degrees, are 3 mm thick, 4 mm high and 5mm long, are used for friction-assisted torque transmission and axial limitation of the end face, and have a structure which mutually forms 120 degrees, and the circular stopper has the characteristics of complete function, compact structure, simple process and the like. Similar to it, spacing hole 111 on the location awl 1, the limit structure that locating hole 211 and the pin formed on the rotator 2, each other become 120 degrees, the diameter of hole is 2 millimeters, and require the straightness less than or equal to 0.01 that hangs down of big footpath end terminal surface of conical segment 11 for the axis of location awl, guarantee axiality and straightness that hangs down, make overall structure's transmission turn round stable, above-mentioned parameter all checks the cycle iterative calculation through intensity and confirms, accurate reasonable with the assurance parameter, moreover, the steam generator is simple in structure, wholly present curved surface structure, there is good bearing capacity and anti-deformation ability, avoided the introduction of parts such as bolt, flange, make locking performance better, and the dismouting is also more convenient, maneuverability promotes.
The application provides a volume connection structure's of location awl theory of operation does: rely on the front end pyramis extrusion and wait to process the terminal surface friction location centering of axle type work piece, can stabilize the biography and turn round and realize synchronous rotation until the two coaxial after, the one end of rotator 2 is connected with high-speed lathe pivot and is realized the transmission, through the cooperation location of ring channel anchor ring between rotator 2 and the location awl 1, the restraint of annular stopper 121 and interference fit's friction passes round, realize the stable biography of high rotational speed and turn round, the barycenter radius of the location awl 1 that adopts this connection structure reduces, work inertia moment and unbalanced response under high rotational speed are all less, can make the axiality positioning accuracy of processing slender axles class spare from original 0.02mm, improve to 0.015mm, workstation exchange positioning efficiency improves about 1 time simultaneously, the location reliability of location awl 1 is high in the processing, the stability of passing round is good, have higher engineering using value.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. The utility model provides a connection structure of location awl, its characterized in that includes the rotator that is used for being connected with the location awl, the mating holes is seted up to the first end of rotator, wherein:
the positioning cone comprises a cone section and a cylinder section which are distributed along the axial direction of the positioning cone, the first end of the cylinder section is coaxially connected with the large-diameter end of the cone section, and the diameter of the cylinder section is smaller than that of the large-diameter end of the cone section; the cylindrical section is provided with an annular groove, so that an annular limiting block is formed at one end, close to the rotating body, of the cylindrical section, the hole wall of the matching hole extends towards the direction close to the axis of the positioning cone and forms a clamping section, and the clamping section is matched with the annular groove; the annular limiting block is provided with three notches to form three limiting block bodies, and the three limiting block bodies are distributed in an annular array around the axis of the positioning cone;
the outer surface profile of the first end of the rotating body is matched with the outer conical surface profile of the conical section, and the cylindrical section is inserted into the matching hole and is in interference fit with the matching hole; and the second end of the rotating body is used for connecting a rotating shaft of the high-speed machine tool.
2. The connecting structure of the positioning cone according to claim 1, further comprising a pin, wherein one surface of the clamping section, which is close to the positioning cone, is provided with a positioning hole, the large-diameter end of the cone section is provided with a limiting hole, the axes of the limiting hole and the positioning hole are parallel to the axis of the positioning cone, the limiting hole penetrates through the cone section, and one end of the pin is inserted into the limiting hole from one end of the limiting hole, which is far away from the rotating body, and is inserted into the positioning hole after penetrating through the limiting hole.
3. The connecting structure of the positioning cone as claimed in claim 2, wherein the number of the pins is multiple, the number of the positioning holes and the number of the limiting holes are the same as the number of the pins, and the pins are distributed in an annular array around the axis of the positioning cone.
4. The connecting structure of the positioning cone as claimed in claim 1, wherein a rotary groove is formed on a groove surface of the annular groove close to the axis of the positioning cone, a convex block is arranged on one surface of the clamping section close to the axis of the positioning cone, and the convex block is matched with the rotary groove.
5. The connecting structure of the positioning cone as claimed in claim 1, wherein the roundness of the groove surface of the annular groove near the axis of the positioning cone is 0.012 mm or less.
6. The connecting structure of a positioning cone according to claim 1, wherein the perpendicularity of the large-diameter end surface of the cone section with respect to the axis of the positioning cone is 0.01 or less.
7. The connecting structure of the positioning cone as claimed in claim 1, wherein the positioning cone and the inner portion of the rotating body are respectively provided with a cavity having a shape matching with the shape of the positioning cone.
8. The connecting structure of the positioning cone as claimed in claim 1, wherein the second end of the rotating body is provided with a mounting hole, the axis of the mounting hole coincides with the axis of the positioning cone, and the size of the mounting hole matches with the size of the rotating shaft of the high-speed machine tool.
CN202210811973.8A 2022-07-12 2022-07-12 Connecting structure of positioning cone Active CN114876968B (en)

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