CN109877353B - Internal stay formula draws core location frock - Google Patents
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- CN109877353B CN109877353B CN201910271529.XA CN201910271529A CN109877353B CN 109877353 B CN109877353 B CN 109877353B CN 201910271529 A CN201910271529 A CN 201910271529A CN 109877353 B CN109877353 B CN 109877353B
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Abstract
The inner supporting type expansion core positioning tool is provided with a pull core and an expansion sleeve, wherein an outer conical surface with a small diameter from back to front is formed at the axial front end of the pull core, and the outer conical surface is linearly displaced in the axial direction through a machine tool linear driving mechanism; the rear end of the expansion sleeve is fixedly connected with the machine tool spindle through a flange plate into a whole and is axially limited and immovable; the front end of the axial direction of the expansion sleeve is finely ground with a finely ground inner conical surface matched with the outer conical surface of the pull core, and a plurality of expansion grooves with axially extending non-through groove structures are uniformly distributed on the inner conical surface sleeve body of the expansion sleeve in the radial direction; the inner hole of the workpiece to be processed outside the expansion sleeve is expanded through the radial deformation generated by the axial retreating displacement of the outer conical surface of the pull core on the sleeve body of the inner conical surface of the expansion sleeve. According to the expansion sleeve of the expansion type expansion structure with the non-through groove internal support, the repeated positioning precision of the expansion core of the expansion sleeve is higher, the service life of the expansion sleeve is longer, and the tool is simple, convenient, economic, efficient and practical to disassemble and assemble.
Description
Technical Field
The invention particularly relates to an internal support type pull core positioning tool with an expansion sleeve adopting a non-through groove design.
Background
Mechanically, in the design of a core pulling positioning tool, the positioning machining precision of a workpiece is ensured by tensioning an inner hole of the workpiece to be machined; the expansion groove of the expansion sleeve is generally designed as a through groove extending along the axial direction of the expansion sleeve. When the pull core (namely the pull core) moves to the left under the action of external force, the outer conical surface of the pull core can apply a radial force to the inner conical surface of the expansion sleeve, so that the expansion sleeve is outwards expanded under the action of the radial force, and the front end of the expansion sleeve is elastically deformed by the pull core to be propped open the expansion sheet like a claw, so that the purpose of radially tensioning the inner hole of the workpiece is achieved. However, because the expansion sleeve adopts a through groove design, especially after the expansion sheet of the expansion sleeve is repeatedly tensioned, expanded and loosened, and the tensioning operation is periodically repeated for multiple times, the resetting and rebounding consistency of a plurality of expansion sheets which are radially and uniformly distributed and elastically deformed of the expansion sleeve cannot be ensured, the repeated clamping and positioning precision of the inner hole of the workpiece to be processed on the pull core expansion sleeve is influenced, the processing size precision of the subsequent workpiece is gradually reduced, and the consistency of the product quality and the reliability of the processing precision are influenced; meanwhile, due to the fact that the rebound and return consistency of the expansion piece of the expansion sleeve is poor, the positioning accuracy of the pull core cannot be guaranteed, the expansion sleeve is discarded early due to stable accuracy, and the use durability and the service life are limited, and the following technical scheme is provided.
Disclosure of Invention
The technical problems solved by the invention are as follows: the inner supporting type pull core positioning tool is provided, and the problem that the repeated positioning precision consistency of the pull core to the inner hole of a workpiece is poor in the prior art due to the design of a lower through groove type expansion sleeve is solved; the technical problem of short service life of repeated positioning of the pull core expansion sleeve.
The technical scheme adopted by the invention is as follows: the inner-supporting type pull core positioning tool is provided with a pull core and an expansion sleeve, an outer conical surface with a small diameter which is changed from back to front is formed at the forward end of the pull core shaft, and the backward end of the pull core shaft is connected with a machine tool linear driving mechanism to realize the axial linear displacement of the pull core; the rear end of the expansion sleeve is fixedly connected with the machine tool spindle into a whole through a flange plate so that the expansion sleeve is axially limited and cannot move; the axial front end of the expansion sleeve is provided with a fine grinding inner conical surface matched with the fine grinding outer conical surface of the pull core, and a plurality of expansion grooves which axially extend and are of a non-through groove structure in the axial extension direction are uniformly distributed on the inner conical surface sleeve body of the expansion sleeve in the radial direction; the inner hole of the workpiece to be processed outside the expansion sleeve is expanded through the radial deformation generated by the axial retreating displacement of the outer conical surface of the pull core on the sleeve body of the inner conical surface of the expansion sleeve.
Further: the groove shape of the expansion groove comprises a linear groove or a curved groove which extends axially, and at least three expansion grooves which are distributed in the radial direction of the expansion sleeve are arranged.
Preferably: in order to facilitate gradual tensioning and prolong the service life of the expansion sleeve, the full cone angle of the match between the outer conical surface of the pull core and the inner conical surface of the expansion sleeve is less than or equal to 15 degrees.
Further: the contact area of the inner conical surface and the outer conical surface of the expansion sleeve is not less than 90 percent when the inner conical surface of the expansion sleeve is in tight expansion fit with the outer conical surface of the pull core, so that progressive expansion is facilitated, and the service life of the expansion sleeve is prolonged.
Further: the inner side wall and the outer side wall of the inlet at the axial front end of the inner conical surface of the expansion sleeve are respectively provided with an inner annular step groove and an outer annular step groove which are used for reducing the wall thickness of the sleeve body at the inlet at the axial front end of the expansion sleeve; and the groove edge of the annular step groove is rounded.
Further: an expansion sleeve boss is arranged between the flange plate at the rear end of the expansion sleeve shaft and the inner conical surface sleeve body at the front end of the expansion sleeve shaft; a plurality of rotation stopping jackscrews are uniformly distributed on the expansion sleeve boss in a manner of being radially vertical to the central axis of the expansion sleeve; a plurality of jackscrew limiting grooves are uniformly distributed along the radial direction of the pull core correspondingly matched with the rotation-stopping jackscrew; and the jackscrew limiting groove axially extends along the wall surface of the outer circumference of the pull core.
Preferably: in order to simplify the number of the tool components, the outer diameters of the flange plate, the expansion sleeve boss and the expansion sleeve are sequentially decreased progressively, and the flange plate, the expansion sleeve boss and the inner conical surface sleeve body at the axial front end of the expansion sleeve are integrally formed.
Further: the pull core is manufactured by precisely grinding 20CrMnTi material matched with vacuum nitriding treatment or low-carbon alloy nitriding steel with the same material performance; the expansion sleeve is made of quenched 65Mn or high-carbon alloy spring steel through precision grinding.
Compared with the prior art, the invention has the advantages that:
1. compared with the expansion sleeve with the through groove structure, the repeated positioning precision of the pull core can be accurate to 0.002 mm; the problems of unsatisfactory repeated positioning precision and short service life of the expansion sleeve mandrel in the through groove design are solved, and the internal support type precise clamping of the inner hole of the high-precision workpiece is really realized; meanwhile, the non-through groove internal support type tensioning structure of the tensioning piece of the tensioning sleeve overcomes the current situation that the repeated positioning accuracy of the pull core is gradually reduced due to unsatisfactory resetting consistency of the repeated elastic deformation of the tensioning sleeve with the through groove external expansion type; the expansion sheet is reset under the influence of metal drawing reset resilience acting force of the sleeve body at the front end and the rear end of the expansion groove shaft of the non-through groove, the reset consistency of radial elastic deformation of the expansion sleeve is more durable, the expansion sleeve has longer service life and higher precision and is more reliable;
2. the expansion sleeve is fixed with a machine tool main shaft through a flange plate; the expansion sleeve of the integrated structure and the pull core of the integrated structure act together; the tool is simple in structure, the expansion sleeve is convenient and quick to replace, and the machining requirements of workpieces with different inner hole diameters can be met by replacing the expansion sleeves with different outer diameters;
3. the invention has the advantages of simple number of components, high precision, low cost, economy and practicality, and is particularly suitable for positioning and clamping thin-wall rotary parts;
4. the pull core can select an axial displacement driving mechanism with a built-in air cylinder and an oil cylinder and then connected with the expansion sleeve pull core according to the working condition requirement, and can be manually clamped; the tool has a foundation with excellent interchangeability and universality with the existing equipment, and is widely applicable.
Drawings
FIG. 1 is a front view of the shaft end of the present invention clamping a workpiece to be machined;
FIG. 2 is a cross-sectional view A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a perspective view of FIG. 1 of the present invention;
FIG. 4 is a perspective view of the expansion sleeve of FIG. 1 according to the present invention;
fig. 5 is an enlarged detail structure diagram of a part a of fig. 2.
Detailed Description
Specific embodiments of the present invention are described below with reference to fig. 1-5.
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention. The following examples are only a part of the present invention, and not all of them. The components used in the following examples are commercially available unless otherwise specified.
In the present invention, unless otherwise explicitly specified or limited, unless otherwise specified or limited, the directional words "upper, lower, left, right, front, rear, inner, outer, vertical, horizontal" and the like are included in the terms only to represent the orientation of the terms in the normal use state, or to facilitate the description of the invention and simplify the description, or to be a colloquial term understood by those skilled in the art, and should not be construed as limiting the terms.
In addition, in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," "disposed," and "provided" are to be construed broadly and may be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. For another example, the connection may be fixed, detachable, or integrated, and may be mechanical; may be directly connected or may be indirectly connected through other intermediate members. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Internal stay formula draws core location frock has and draws core 1 and cover 2 that rises, its characterized in that: (as shown in fig. 2), the front end of the axial direction of the pull core 1 and the pull core are integrally formed with an outer conical surface 101 with a diameter which is gradually increased from back to front (from left to right), and the rear end of the axial direction of the pull core 1 is connected with a machine tool linear driving mechanism to realize the axial linear displacement of the pull core 1; specifically, the connection manner of the rear end of the axial direction of the pull core 1 and the linear driving mechanism of the machine tool is the same as that of the spindle and the linear driving mechanism of the machine tool in the prior art, and therefore, the detailed description thereof is omitted. The rear end of the expansion sleeve 2 in the axial direction is fixedly connected with a machine tool main shaft into a whole through a flange plate 201, so that the expansion sleeve 2 is axially limited and cannot move; preferably, three flange mounting holes of the flange plate 201 are uniformly formed along the radial direction of the plate body, so that the quick, efficient and centering mounting between the expansion sleeve and the machine tool spindle is realized. The front end of the axial direction of the expansion sleeve 2 is provided with a fine grinding inner conical surface 202 matched with the fine grinding outer conical surface 101 of the pull core 1 in a fine grinding way, (as shown in figure 2), the inner conical surface 202 is from back to front (namely the diameter is from left to right and is small and large), and a plurality of expansion grooves 3 (as shown in figure 4) which extend axially and are of a non-through groove structure in the axial extending direction are uniformly distributed in the radial direction of the inner conical surface 202 of the expansion sleeve 2; the radial deformation generated on the sleeve body of the inner conical surface 202 of the expansion sleeve 2 by the axial retreating displacement of the outer conical surface 101 of the pull core 1 is used for expanding the inner hole of the workpiece 4 to be processed outside the expansion sleeve 2.
Further: the groove shape of the expansion groove 3 comprises a linear groove or a curved groove which extends axially, and at least three expansion grooves 3 distributed in the radial direction of the expansion sleeve 2 are provided. The embodiment shown in fig. 4 is an embodiment with three expansion slots 3. The three expansion grooves 3 are linear grooves extending axially along the inner conical surface sleeve body of the expansion sleeve 2; besides, the expanding groove 3 can also be an S-shaped curve groove extending along the axial direction of the inner conical surface sleeve body of the expanding sleeve 2. It should be noted that, the above is only an example of the structure of the non-through groove expansion groove, and can be further optimized, and all the non-through groove expansion groove structures capable of realizing the internal support expansion type expansion function are suitable for this case.
Preferably: the full cone angle of the matching of the external cone surface 101 of the pull core 1 and the internal cone surface 202 of the expansion sleeve 2 is less than or equal to 15 degrees; the use of the repeated elastic deformation durability of the expansion sleeve 2 is facilitated, the service life of the expansion sleeve is prolonged, and the high-precision repeated positioning of the expansion sleeve internal support structure on the pull core is ensured.
Still further, cooperate pull core 1 external cone surface 101 and rise 2 internal cone surface 202 cooperation full cone angle less than or equal to 15 combined action, for favourable progressive rising, favourable axial effective length direction produces more even tension, favourable rise 2 repeated elastic deformation durability's of elastic deformation use, avoid the cover body quick expansion or restore to the throne a series of adverse factor influence that deformation brought, favourable rise the extension of cover life-span, guarantee rise the cover internal stay structure to the high accuracy repeat positioning of pulling the core: the contact area of the inner conical surface and the outer conical surface of the expansion sleeve 2 is not less than 90 percent when the inner conical surface 202 and the outer conical surface 101 of the pull core 1 are in tight expansion fit. And as shown in fig. 2, the outer conical surface of the pull core 1 continuously moves linearly along the small end of the inner conical surface of the expansion sleeve 2 (namely continuously leftwards) in the axial direction to realize the expansion of the inner holes of the workpiece 4 to be processed by the pull core 1 and the expansion sleeve 2.
Furthermore, (as shown in fig. 2) the inner and outer side walls of the inlet at the axial front end of the inner conical surface 202 of the expansion sleeve 2 are respectively provided with an inner and outer annular step grooves 204 for reducing the wall thickness of the sleeve body at the inlet at the axial front end of the expansion sleeve 2; and the groove of annular step groove 204 is along a rounded corner 205 (fig. 5). To this end, it should be noted that, by the arrangement of the annular stepped groove 204 at the large end of the expansion sleeve 2, the wall thickness of the sleeve body at the inlet of the conical surface sleeve body in the expansion sleeve 2 is reduced, for the expansion sleeve designed by the expansion groove with the non-through groove structure, the expansion sleeve has the effect of increasing the metal springback resetting tensile toughness of the expansion sleeve under the combined action of the expansion sleeve metal materials processed by special processes hereafter, and particularly, the expansion sleeve is more favorable for the expansion tensioning of the internal support type tensioning effect of the expansion sleeve 2 and the springback resetting of the tensioned metal under the design of the expansion groove 3 with the non-through groove structure of the expansion sleeve 2.
Further: to limit the rotation of the core 1, the linearity of the axial displacement of the core 1 is facilitated: an expansion sleeve boss 203 is arranged between the flange 201 at the axial rear end of the expansion sleeve 2 and the sleeve body of the inner conical surface 202 at the axial front end of the expansion sleeve 2; a plurality of rotation stopping jackscrews 5 are uniformly distributed on the expansion sleeve boss 203 in a manner of being radially vertical to the central axis of the expansion sleeve 2 (as shown in figure 2); a plurality of jackscrew limiting grooves 6 are uniformly distributed along the radial direction of the pull core 1 in a matching and corresponding mode with the rotation-stopping jackscrew 5; and the jackscrew limiting groove 6 axially extends along the outer circumferential wall surface of the pull core 1.
Further: for preventing that spline jackscrew 5 supports the jackscrew spacing recess 6 of tightly drawing core 1, prevent that it from leading to drawing core eccentric positioning, prevent that spline jackscrew 5 from influencing the positioning accuracy who draws core 1: and a certain gap is reserved between the rotation stopping end of the rotation stopping jackscrew 5 and the bottom of the jackscrew limiting groove 6 of the pull core 1.
Preferably: in order to simplify the number of the tool components, the outer diameters of the flange 201, the expansion sleeve boss 203 and the expansion sleeve 2 are sequentially decreased progressively, and the flange 201, the expansion sleeve boss 203 and the inner conical surface 202 of the axial front end of the expansion sleeve 2 are integrally formed.
Further: the pull core 1 is manufactured by precisely grinding 20CrMnTi material matched with vacuum nitriding treatment or low-carbon alloy nitriding steel with the same material performance; the vacuum nitriding treatment process can enable the material to have good toughness and wear resistance; the precise grinding process matched with the subsequent processing of the pull core 1 is used for controlling the geometric precision of the pull core 1. The expansion sleeve 2 is made of quenched 65Mn or high-carbon alloy spring steel through precision grinding; wherein the quenching treatment aims to ensure that the material has higher hardness and better elasticity; and the precision grinding process is used for controlling the geometric precision of the expansion sleeve 2.
The working principle of the invention is as follows: in the use, for preventing that the small particle diameter powder iron fillings that produce in the course of working from rising groove 3 entering rise cover 2 and the cooperation conical surface between the core 1, eliminate the adverse effect that the powder iron fillings that produce brought the follow-up positioning accuracy of frock in the course of working: industrial gray silicone grease is required to be coated in a groove cavity of the expansion groove 3 of the finished product expansion sleeve 2 to seal and seal the expansion groove, powder iron chips are adhered and prevented from entering a matching surface through the industrial gray silicone grease, and adverse factors brought by reduction of matching positioning precision due to accidental entering of the powder iron chips are eliminated. In the tensioning process (as shown in fig. 2), the pull core 1 moves to the left under the action of external force (such as a hydraulic or pneumatic linear displacement driving mechanism of a machine tool), and the outer conical surface 101 at the axial front end of the pull core 1 is gradually contacted with the inner conical surface 202 at the axial front end of the expansion sleeve 2; along with the increase of the pulling force of the pull core 1, the pull core 1 continues to move leftwards, the large-diameter end of the outer conical surface 101 of the pull core 1 continuously retreats and moves leftwards and gives a radial force to the small-diameter sleeve body at the left part of the inner conical surface 202 of the expansion sleeve 2 in the continuous retreating and leftwards moving process, so that the non-through groove expansion groove sleeve body formed in the middle section of the inner conical surface 202 sleeve body of the expansion sleeve 2 in the non-through groove structure expands outwards under the action of the radial force, the purpose that the expansion sleeve is sleeved on the outer wall of the expansion sleeve 2 to process the inner hole of the workpiece 4 is achieved through the expansion groove expanding effect of the non-through groove structure in. After the machining is finished, (as shown in figure 2) the pull core 1 is axially fed rightwards, the large-diameter outer conical surface of the pull core 1 exits from the small-diameter inner conical surface of the expansion sleeve 2, the expansion effect of the pull core 1 on the expansion groove of the non-through groove structure in the middle section of the expansion sleeve 2 disappears, the expansion sleeve 2 loses the expansion clamping force on the inner hole of the workpiece, and the workpiece is dismounted.
From the above description it can be found that: firstly, compared with an expansion sleeve with a through groove structure, the expansion sleeve structure with the non-through groove internal-support middle section overcomes the problems of unsatisfactory repeated positioning precision and short service life of an expansion sleeve mandrel in the through groove design, the repeated positioning precision of a pull core can be accurate to 0.002mm, and the internal-support type precise clamping of an inner hole of a high-precision workpiece is really realized; meanwhile, the non-through groove internal expanding type tensioning structure of the expansion sleeve expansion sheet overcomes the current situation that the repeated positioning accuracy of the pull core is gradually reduced due to the fact that the end part expanding type expansion sheet is not ideal in repeated elastic deformation resetting consistency due to the outward expanding type tensioning structure of the shaft end of the through groove expansion sleeve; the expansion piece is reset by the influence of metal drawing resetting resilience acting force of the front end sleeve body and the rear end sleeve body of the expansion groove shaft of the non-through groove, the resetting consistency of radial elastic deformation of the expansion sleeve body is more durable, the expansion head of the expansion sleeve is longer in service life, higher in precision and more reliable. Secondly, the expansion sleeve is fixed with a machine tool main shaft through a flange plate; the expansion sleeve of the integrated structure and the pull core of the integrated structure act together; the tool structure is simplified, the expansion sleeve is convenient and quick to replace, and the machining requirements of workpieces with different inner hole diameters can be met by replacing the expansion sleeves with different outer diameters. Moreover, the invention has the advantages of simple number of components, high precision, low cost, economy and practicality, and is particularly suitable for positioning and clamping thin-wall rotary parts. Finally, according to the working condition requirements, the pull core can be manually clamped by selecting an axial displacement driving mechanism with a built-in air cylinder and an oil cylinder and then connected with the pull core of the expansion sleeve; the tool has a foundation with excellent interchangeability and universality with the existing equipment, and is widely applicable. And the operation steps of expanding the sleeve to expand and replace the workpiece are simple, and meanwhile, the expanding sleeves with different types and outer diameters are quickly and conveniently replaced.
In conclusion, the expansion sleeve is designed in a non-through groove manner, the expansion sleeve inner support expansion type expansion manner is adopted, the repeated positioning precision of the expansion sleeve pull core can reach 0.002mm, the coaxial precision of expansion sleeve inner support expansion deformation rebound resetting is high, the radial repeated positioning precision is guaranteed, the expansion sleeve is more durable in use and longer in service life; the clamp structure is simplified; the workpiece and the expansion sleeve are simple, convenient, economical, efficient and practical to disassemble, assemble and replace.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (4)
1. The inner-supporting type pull core positioning tool is provided with a pull core (1) and an expansion sleeve (2), wherein an outer conical surface (101) with a small diameter from back to front is formed at the axial front end of the pull core (1), and the axial rear end of the pull core (1) is connected with a machine tool linear driving mechanism to realize the axial linear displacement of the pull core (1); the rear end of the expansion sleeve (2) in the axial direction is fixedly connected with a machine tool main shaft into a whole through a flange plate (201) so that the expansion sleeve (2) is axially limited and cannot move; the front end of the shaft of the expansion sleeve (2) is provided with a fine grinding inner conical surface (202) matched with the fine grinding outer conical surface (101) of the pull core (1), and the expansion sleeve is characterized in that: a plurality of expanding grooves (3) which extend axially and are of a non-through groove structure in the axial extending direction are uniformly distributed on the sleeve body of the inner conical surface (202) of the expanding sleeve (2) in the radial direction; the inner hole of the workpiece (4) to be processed outside the expansion sleeve (2) is expanded through the radial deformation generated by the axial retreating displacement of the outer conical surface (101) of the pull core (1) on the sleeve body of the inner conical surface (202) of the expansion sleeve (2); the full cone angle of the outer cone surface (101) of the pull core (1) matched with the inner cone surface (202) of the expansion sleeve (2) is less than or equal to 15 degrees; the contact area of the inner conical surface and the outer conical surface is not less than 90% when the inner conical surface (202) of the expansion sleeve (2) is in expansion fit with the outer conical surface (101) of the pull core (1); an expansion sleeve boss (203) is arranged between the flange plate (201) at the axial rear end of the expansion sleeve (2) and the sleeve body of the inner conical surface (202) at the axial front end of the expansion sleeve (2); the expansion sleeve boss (203) is radially and uniformly distributed with a plurality of rotation stopping jackscrews (5) vertical to the central axis of the expansion sleeve (2); a plurality of jackscrew limiting grooves (6) are uniformly distributed along the radial direction of the pull core (1) correspondingly in matching with the rotation-stopping jackscrew (5); the jackscrew limiting groove (6) axially extends along the outer circumferential wall surface of the pull core (1); the outer diameters of the flange plate (201), the expansion sleeve boss (203) and the expansion sleeve (2) are sequentially decreased progressively, and the flange plate (201), the expansion sleeve boss (203) and an inner conical surface (202) at the axial front end of the expansion sleeve (2) are integrally formed.
2. The internal stay formula draws core location frock of claim 1, its characterized in that: the groove shape of the expansion groove (3) comprises an axially extending linear groove or a curved groove, and at least three expansion grooves (3) are radially distributed on the expansion sleeve (2).
3. The internal stay formula draws core location frock of claim 1, its characterized in that: the inner side wall and the outer side wall of an inlet at the axial front end of an inner conical surface (202) of the expansion sleeve (2) are respectively provided with an inner annular step groove and an outer annular step groove (204) which are used for reducing the wall thickness of a sleeve body at the inlet at the axial front end of the expansion sleeve (2); and the groove edge of the annular step groove (204) is rounded (205).
4. The internal stay formula draws core location frock of claim 1, its characterized in that: the pull core (1) is manufactured by precisely grinding 20CrMnTi material matched with vacuum nitriding treatment or low-carbon alloy nitriding steel with the same material performance; the expansion sleeve (2) is made of quenched 65Mn or high-carbon alloy spring steel through precision grinding.
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| CN112276607A (en) * | 2019-07-23 | 2021-01-29 | 晟通科技集团有限公司 | CNC adds clamping apparatus |
| CN110549145B (en) * | 2019-09-19 | 2024-04-09 | 浙江今飞凯达轮毂股份有限公司 | Internal stay formula clamping frock |
| CN110953965B (en) * | 2019-12-20 | 2024-05-03 | 中信戴卡股份有限公司 | Gauge for detecting wall thickness of mounting hole of auxiliary frame body |
| CN112743355A (en) * | 2021-02-26 | 2021-05-04 | 杭州智谷精工有限公司 | Positioning and clamping device for thin-wall annular part |
| CN114211012A (en) * | 2022-01-17 | 2022-03-22 | 广州铮高精密机械有限公司 | Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig |
| CN114905407B (en) * | 2022-04-07 | 2023-09-01 | 南京理工大学 | Fixed rotary device for ball valve machining |
| CN116512125A (en) * | 2023-05-15 | 2023-08-01 | 山东华准机械有限公司 | Clamp and machine tool for machining rolling linear guide rail pair sliding block body |
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| US5918868A (en) * | 1995-02-28 | 1999-07-06 | Techcom Technical Computerized Fixturing Ltd. | Universal modular fixturing systems |
| CN103990825A (en) * | 2014-06-18 | 2014-08-20 | 中核(天津)科技发展有限公司 | Machining tool for ultrathin-walled cylinder workpiece |
| CN104551069A (en) * | 2014-12-22 | 2015-04-29 | 重庆博钻太阳能灯具有限公司 | Tooling for processing lamp spherical holder |
| CN207447387U (en) * | 2017-09-29 | 2018-06-05 | 刘成文 | A kind of expansion sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7748718B2 (en) * | 2005-06-20 | 2010-07-06 | The Gleason Works | Expanable mandrel |
| CN202461576U (en) * | 2012-01-17 | 2012-10-03 | 兴平市东龙工具制造有限公司 | Expansion sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5918868A (en) * | 1995-02-28 | 1999-07-06 | Techcom Technical Computerized Fixturing Ltd. | Universal modular fixturing systems |
| CN103990825A (en) * | 2014-06-18 | 2014-08-20 | 中核(天津)科技发展有限公司 | Machining tool for ultrathin-walled cylinder workpiece |
| CN104551069A (en) * | 2014-12-22 | 2015-04-29 | 重庆博钻太阳能灯具有限公司 | Tooling for processing lamp spherical holder |
| CN207447387U (en) * | 2017-09-29 | 2018-06-05 | 刘成文 | A kind of expansion sleeve |
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