CN110640521A - Automatic clamp for positioning and pressing end face of thin-wall sleeve in outer surrounding mode - Google Patents
Automatic clamp for positioning and pressing end face of thin-wall sleeve in outer surrounding mode Download PDFInfo
- Publication number
- CN110640521A CN110640521A CN201911018695.5A CN201911018695A CN110640521A CN 110640521 A CN110640521 A CN 110640521A CN 201911018695 A CN201911018695 A CN 201911018695A CN 110640521 A CN110640521 A CN 110640521A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- thin
- elastic sleeve
- clamp body
- outer holding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/4006—Gripping the work or tool by a split sleeve
- B23B31/402—Gripping the work or tool by a split sleeve using fluid-pressure means to actuate the gripping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
- B23B31/4053—Gripping the work or tool by jaws moving radially controlled by conical surfaces using fluid-pressure means to actuate the gripping means
Abstract
The invention designs an automatic clamp for externally holding and positioning a thin-wall sleeve and compressing the end face in the field of machining, wherein a clamp body is arranged on a transition flange, the left end of the clamp body is a round hole, and the right end of the clamp body is a conical hole; the outer holding elastic sleeve is coaxially arranged in the clamp body, the left end of the outer holding elastic sleeve is matched with the circular hole of the clamp body, and the right end of the outer holding elastic sleeve and the conical hole of the clamp body form a conical surface holding structure; the pressing rod column body is matched with an inner hole at the left end of the outer embracing elastic sleeve, a disc spring is arranged between the pressing rod column body and the inner hole, a pressing rod body extends out of the clamp body through the outer embracing elastic sleeve and a through rectangular groove on the clamp body, and the pressing rod is connected with a machine tool pull rod through a screw; the end surface pressing sleeve is coaxially sleeved on the clamp body and is buckled with the rod body of the pressure rod through an L-shaped through groove on the pressing sleeve; the inner and outer support rings and the support rod form a frame which is sleeved on two sides of the outer holding elastic sleeve and the pressure rod; the thin-wall sleeve is placed in an inner hole at the right end of the outer holding elastic sleeve, the outer supporting ring is axially positioned, the outer holding elastic sleeve is held by the pressure rod through the disc spring, and meanwhile, the end face of the thin-wall sleeve is pressed through the end face pressing sleeve, so that the problem of clamping deformation of the thin-wall sleeve is solved.
Description
Technical Field
The invention relates to a tool clamp in the machining industry, in particular to an automatic clamp which is used for an automatic lathe and is used for positioning a thin-wall sleeve in an outer surrounding mode and pressing the end face of the thin-wall sleeve.
Background
When an automatic lathe is used for processing an inner hole of the thin-wall sleeve, the clamping deformation is a problem which is difficult to solve. At the moment, the clamping can not be realized by a power chuck generally, and an external holding type elastic clamp or an end face pressing clamp is needed. Because the rigidity of the thin-wall sleeve is small, the existing external holding type elastic clamp still can cause the radial clamping deformation of the thin-wall sleeve, and the processing precision is influenced; the processing precision of the end face pressing clamp depends on the radial positioning precision of the thin-wall sleeve on the clamp, and when the thin-wall sleeve needs to be installed and taken out of the clamp, a radial gap must be reserved between a clamp hole and the thin-wall sleeve, and the position of the radial gap randomly changes when the thin-wall sleeve is installed and clamped, so the radial installation gap of the end face pressing clamp influences the processing precision.
Disclosure of Invention
The invention designs an automatic clamp capable of realizing outer holding and end surface pressing simultaneously, and solves the problem of clamping deformation of a thin-wall sleeve. The clamp eliminates the radial installation gap between the clamp hole and the thin-wall sleeve by external holding, so that the thin-wall sleeve is accurately and radially positioned, then the end face of the thin-wall sleeve is pressed tightly, the thin-wall sleeve is clamped, and the automatic clamp for external holding positioning and end face pressing of the thin-wall sleeve is provided for an automatic lathe.
The technical problem solved by the invention is realized by adopting the following technical scheme:
in the automatic fixture that embraces location and terminal surface compress tightly outside thin wall cover: the transition flange is arranged on a machine tool flange through a first inner hexagon screw; the fixture body is arranged on the end face of the transition flange through a spigot by using a second hexagon socket screw, the left end of the fixture body is provided with a round hole, the right end of the fixture body is provided with an inner taper hole, and the end of the inner taper hole is provided with a radially through rectangular groove; the outer holding elastic sleeve is coaxially arranged in the clamp body, the left end of the elastic sleeve is provided with a cylindrical surface which is matched with a round hole at the left end of the clamp body, the right end of the elastic sleeve is provided with a conical surface which forms a conical surface holding structure with an inner conical hole at the right end of the clamp body, and the conical surface end is also provided with a rectangular groove which is radially communicated; the cylinder of the pressure lever is coaxially arranged in an inner hole at the left end of the outer holding elastic sleeve, a disc spring is arranged between the cylinder and the inner hole, the rod body of the pressure lever extends out of the clamp body through the outer holding elastic sleeve and a radial through rectangular groove on the clamp body, and the pressure lever is connected with a machine tool pull rod through a third inner hexagonal screw and a round nut; the end surface pressing sleeve is coaxially sleeved on the clamp body and is buckled with the rod body of the pressure rod through two L-shaped through grooves on the pressing sleeve; the inner support ring, the outer support ring and the four support rods form a frame which is sleeved on two sides of the outer holding elastic sleeve and the pressure rod; the thin-wall sleeve (the part to be processed) is placed in an inner hole at the right end of the outer holding elastic sleeve, the outer supporting ring is used for axial positioning, the outer holding elastic sleeve is axially stressed through the pressure rod through the disc spring to hold the thin-wall sleeve to realize radial positioning, and meanwhile, the end face of the thin-wall sleeve is pressed through the end face pressing sleeve to realize clamping.
In the automatic fixture that embraces location and terminal surface compress tightly outside thin wall cover: the cone at the right end of the outer embracing elastic sleeve is provided with six open grooves besides a rectangular groove which is penetrated in the radial direction, the centers of the rectangular groove and the open grooves are uniformly distributed along the circumferential direction, and the cone is divided into eight sections, so that the cone section of the outer embracing elastic sleeve has good radial deformation capacity; the cone at the right end of the external holding elastic sleeve is provided with an inner hole, and the inner hole is in clearance fit with the thin-wall sleeve (a part to be processed) in a non-holding state so as to be convenient for putting in and taking out the thin-wall sleeve; the cylindrical surface at the left end of the outer holding elastic sleeve is in small clearance fit with the inner hole at the left end of the clamp body, so that the guide of the outer holding elastic sleeve is realized; the inner hole at the left end of the outer holding elastic sleeve is in large clearance fit with the cylinder of the pressure lever so as to avoid the phenomenon of clamping stagnation caused by simultaneous fit of the two parts.
In the automatic fixture that embraces location and terminal surface compress tightly outside thin wall cover: the disc spring is arranged in an inner hole at the left end of the pressing rod and extends out of one section, the left surface of the pressing rod abuts against the outer holding elastic sleeve, and the holding force of the clamp is adjusted through the number of the disc spring pieces.
In the automatic fixture that embraces location and terminal surface compress tightly outside thin wall cover: the outer holding elastic sleeve is made of spring steel and is subjected to heat treatment.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention designs the automatic clamp which can simultaneously realize the outer holding and the end surface pressing, solves the difficult problem of clamping deformation of the thin-wall sleeve and has high clamping precision. The fixture eliminates the installation gap between the fixture and the thin-wall sleeve through outer embracing, realizes radial accurate positioning of the thin-wall sleeve, and then fixedly clamps the thin-wall sleeve through the pressure end face. The holding force of the clamp can be adjusted by the number of the disc springs, and the sum of the pressure of the disc springs and the pressing force of the end faces is equal to the pulling force of the machine tool pull rod.
2. The power of the clamp designed by the invention comes from the rotary oil cylinder or the rotary air cylinder, so that the mechanization is realized, the labor intensity of operators is reduced, the use is convenient, the rapid clamping of parts can be realized, and the working efficiency is high.
3. The invention has simple structure and is convenient to manufacture.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a three-dimensional view of parts 5, 6, 8, 10;
fig. 3 is a three-dimensional schematic view of the assembled relationship of parts 5, 6, 8, 10.
In the figure: 1 round nut, 2 transition flanges, 3 screws I, 4 screws II, 5 clamp bodies, 6 outer holding elastic sleeves, 601 cylindrical surfaces, 602 conical surfaces, 7 disc springs, 8 pressing rods, 801 cylinders, 802 rod bodies, 9 screws III, 10 end face pressing sleeves, 11 thin-wall sleeves (machined parts), 12 inner supporting rings, 13 pressing and filling oil cups, 14 supporting rods, 15 outer supporting rings, 16 machine tool pull rods and 17 machine tool flanges.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Referring to fig. 1, 2, and 3, the structural form of the automatic clamp for positioning and compressing the end face of the thin-wall sleeve in the present embodiment is as follows: the transition flange 2 is arranged on a flange plate of a main shaft of the machine tool by a screw I3; the clamp body 5 is installed on the end face of the transition flange 2 through a spigot by a screw II 4, the left end of the clamp body 5 is provided with a round hole, the right end of the clamp body is provided with an inner taper hole, and the end of the inner taper hole is provided with a radially through rectangular groove; the outer holding elastic sleeve 6 is coaxially arranged in the fixture body 5, the left end of the outer holding elastic sleeve 6 is provided with a cylindrical surface 601 which is matched with a round hole at the left end of the fixture body 5, the right end of the outer holding elastic sleeve is provided with a conical surface 602 which forms a conical surface holding structure with an inner conical hole at the right end of the fixture body 5, and the conical surface end is also provided with a radially through rectangular groove; a cylinder 801 of a pressure lever 8 is coaxially arranged in an inner hole at the left end of the outer holding elastic sleeve 6, a disc spring 7 is arranged between the cylinder 801 and the inner hole, a rod body 802 of the pressure lever 8 extends out of the clamp body 5 through a radial through rectangular groove on the outer holding elastic sleeve 6 and the clamp body 5, the pressure lever 8 is connected with a machine tool pull rod through a screw III 9 and a round nut 1, and the screw I3, the screw II 4 and the screw III 9 are all hexagon socket head bolts; the end surface pressing sleeve 10 is coaxially sleeved on the clamp body 5 and is buckled with the rod body 802 of the pressing rod 8 through two L-shaped through grooves which are communicated with the end surface pressing sleeve 10; the inner support ring 12, the outer support ring 15 and the four support rods 14 form a frame and are sleeved on two sides of the outer holding elastic sleeve 6 and the pressure rod 8; the thin-wall sleeve (processed part) 11 is placed in an inner hole at the right end of the outer holding elastic sleeve 6, is axially positioned by an outer supporting ring 15, is axially stressed by a pressure lever 8 through a disc spring 7 to hold the thin-wall sleeve 11 to realize radial positioning, and simultaneously presses the end face of the thin-wall sleeve 11 through an end face pressing sleeve 10 to realize clamping.
In the specific embodiment, the cone at the right end of the outer elastic sleeve 6 is provided with six open slots in addition to a rectangular slot which is through in the radial direction, the center of the rectangular slot and the center of the open slot are uniformly distributed along the circumferential direction, and the cone is divided into eight segments, so that the cone of the outer elastic sleeve 6 has good radial deformability; the cone at the right end of the external holding elastic sleeve 6 is provided with an inner hole, and the inner hole is in clearance fit with the thin-wall sleeve (processed part) 11 under the state of not holding tightly so as to be convenient for putting in and taking out the thin-wall sleeve; the cylindrical surface 601 at the left end of the outer embracing elastic sleeve 6 is in small clearance fit with the inner hole at the left end of the clamp body 5, so that the outer embracing elastic sleeve 6 is guided; the inner hole at the left end of the outer holding elastic sleeve 6 is in large clearance fit with the column 801 of the pressure lever 8, so that the clamping stagnation phenomenon caused by the simultaneous fit of the two parts is avoided.
In the specific embodiment, the disc spring 7 is arranged in an inner hole at the left end of the pressure rod 8 and extends out of a section, meanwhile, the left surface of the pressure rod abuts against the outer holding elastic sleeve 6, and the holding force of the clamp is adjusted through the number of the disc spring pieces.
In the specific embodiment, the outer holding elastic sleeve 6 has elasticity, is made of spring steel and is subjected to heat treatment.
In a specific embodiment, the action process of the automatic clamp for positioning the thin-wall sleeve in an outer embracing mode and compressing the end face is as follows:
the machine tool pull rod 16 drives a frame consisting of the round nut 1, the outer holding elastic sleeve 6, the disc spring 7, the pressure lever 8, the inner support ring 12, the outer support ring 15 and the support rod 14 and the end face pressure sleeve 10 to reciprocate through the third screw 9, so that the thin-wall sleeve 11 is clamped and loosened.
When the machine tool pull rod 16 drives the screw III 9 to be in a loosening state, the thin-wall sleeve 11 is arranged in an inner hole on the right side of the outer embracing elastic sleeve 6 and leans against the right end face of the outer supporting ring 15, then the notch of the L-shaped groove of the end face pressing sleeve 10 is aligned to the body rod 802 of the pressing rod 8 from the right side and sleeved on the outer circle of the clamp body 5 in a coaxial mode, and the thin-wall sleeve is pushed to the bottom and then rotates, so that the end face pressing sleeve 10 and the body rod 802 of the pressing rod 8 are buckled.
When the machine tool pull rod 16 is tensioned leftwards, the screw III 9 drives the round nut 1, the outer holding elastic sleeve 6, the disc spring 7, the pressure lever 8, the inner support ring 12, a frame formed by the outer support ring 15 and the support rod 14, the thin-wall sleeve (a part to be processed) 11 and the end face pressure sleeve 10 to move leftwards together; the frame formed by the inner support ring 12, the outer support ring 15 and the support rod 14 is firstly leaned against the right end face of the transition flange 2 to be axially fixed, so that the thin-wall sleeve 11 is axially positioned; the machine tool pull rod 16 is tensioned leftwards continuously, the conical surface 602 at the right end of the outer holding elastic sleeve 6 is blocked by the inner conical hole at the right end of the clamp body 5 and is abutted to form a conical surface holding structure, so that the inner hole at the right side of the outer holding elastic sleeve 6 is contracted to hold the thin-wall sleeve 11, the installation gap between the inner hole and the thin-wall sleeve 11 is eliminated, the thin-wall sleeve 11 is positioned radially and accurately, and the outer holding elastic sleeve 6 cannot move leftwards any more; the machine tool pull rod 16 is tensioned leftwards, the right end face of the round nut 1 is separated from the left end face of the outer holding elastic sleeve 6, the compression rod 8 further compresses the disc spring 7, and drives the end face pressing sleeve 10 to move leftwards until the right end face of the thin-wall sleeve 11 is pressed, and clamping of the thin-wall sleeve 11 is completed.
The loosening process after the machining is completed is the reverse of the above process.
The above description is of the preferred embodiment of the present application and is not intended to limit the scope of the present application; all equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.
Claims (4)
1. The automatic clamp for positioning the thin-wall sleeve in an outer embracing mode and compressing the end face is characterized in that: the machine tool flange (17) is provided with a transition flange (2) through a first screw (3); a clamp body (5) is mounted on the end face of the transition flange (2) through a second screw (4), the left end of the clamp body (5) is provided with a round hole, the right end of the clamp body is provided with an inner taper hole, and a radially through rectangular groove is formed in the end of the inner taper hole; an outer holding elastic sleeve (6) is coaxially arranged in the clamp body (5), the left end of the outer holding elastic sleeve (6) is provided with a cylindrical surface (601) and is matched with a round hole at the left end of the clamp body (5), the right end of the outer holding elastic sleeve is provided with a conical surface (602) and forms a conical surface holding structure with an inner conical hole at the right end of the clamp body (5), and the conical surface end is also provided with a radially through rectangular groove; a cylinder (801) of a pressure lever (8) is coaxially arranged in an inner hole at the left end of the outer holding elastic sleeve (6), a disc spring (7) is arranged between the cylinder and the outer holding elastic sleeve, a rod body (802) of the pressure lever (8) radially penetrates through the rectangular groove in the outer holding elastic sleeve (6) and the clamp body (5) and extends out of the clamp body (5), and the pressure lever (8) is connected with a machine tool pull rod (16) through a third screw (9) and a round nut (1); an end face pressing sleeve (10) is coaxially sleeved on the clamp body (5), two L-shaped through grooves penetrate through the end face pressing sleeve (10) and are buckled with a rod body (802) of the pressure rod (8); the inner support ring (12), the outer support ring (15) and four support rods (14) form a frame which is sleeved on two sides of the outer embracing elastic sleeve (6) and the pressure rod (8); thin-wall sleeve (11) is placed in an inner hole at the right end of the outer holding elastic sleeve (6), the thin-wall sleeve (11) is axially positioned by an outer supporting ring (15), the outer holding elastic sleeve (6) is axially stressed by a pressure lever (8) through a disc spring (7) to hold the thin-wall sleeve (11) to realize radial positioning, and meanwhile, the end face of the thin-wall sleeve (11) is pressed by an end face pressing sleeve (10) to realize clamping.
2. The automatic clamp for the external embracing positioning and end surface pressing of the thin-wall sleeve as claimed in claim 1, wherein: six open slots are further formed in the cone at the right end of the outer holding elastic sleeve (6), the centers of the rectangular slots and the centers of the open slots are uniformly distributed along the circumferential direction, and the cone is divided into eight sections; the cone at the right end of the outer holding elastic sleeve (6) is provided with an inner hole, and the inner hole is in clearance fit with the thin-wall sleeve (11) in a non-holding state; the cylindrical surface (601) at the left end of the outer holding elastic sleeve (6) is in small clearance fit with the round hole at the left end of the clamp body (5); the inner hole at the left end of the outer holding elastic sleeve (6) is in large clearance fit with the column body (801) of the pressure lever (8).
3. The automatic clamp for the external embracing positioning and the end face pressing of the thin-wall sleeve according to claim 1 or 2, is characterized in that: the disk spring (7) is arranged in an inner hole at the left end of the pressure lever (8) and extends out of one section, and the left surface of the disk spring props against the outer holding elastic sleeve (6).
4. The automatic clamp for outer embracing positioning and end face pressing of the thin-wall sleeve as claimed in claim 3, wherein: the outer holding elastic sleeve (6) is elastic and made of spring steel and is subjected to heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018695.5A CN110640521A (en) | 2019-10-24 | 2019-10-24 | Automatic clamp for positioning and pressing end face of thin-wall sleeve in outer surrounding mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018695.5A CN110640521A (en) | 2019-10-24 | 2019-10-24 | Automatic clamp for positioning and pressing end face of thin-wall sleeve in outer surrounding mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110640521A true CN110640521A (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911018695.5A Pending CN110640521A (en) | 2019-10-24 | 2019-10-24 | Automatic clamp for positioning and pressing end face of thin-wall sleeve in outer surrounding mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110640521A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909967A (en) * | 2021-10-08 | 2022-01-11 | 江苏星晨高速电机有限公司 | Collet type clamping device |
| CN114226777A (en) * | 2021-12-30 | 2022-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Turning deformation-preventing bidirectional structure and method based on edge long overhanging thin wall |
-
2019
- 2019-10-24 CN CN201911018695.5A patent/CN110640521A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909967A (en) * | 2021-10-08 | 2022-01-11 | 江苏星晨高速电机有限公司 | Collet type clamping device |
| CN114226777A (en) * | 2021-12-30 | 2022-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Turning deformation-preventing bidirectional structure and method based on edge long overhanging thin wall |
| CN114226777B (en) * | 2021-12-30 | 2023-12-08 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Turning anti-deformation bidirectional structure and method based on long overhanging thin wall of edge |
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