Multi-station flexible clamp
阅读说明:本技术 一种多工位柔性夹具 (Multi-station flexible clamp ) 是由 林志斌 杜斌 裴庆川 杨江 孔雄 马国洲 于 2019-12-09 设计创作,主要内容包括:本发明公开了一种多工位柔性夹具,包括夹具体,夹具体设有定位槽、供虎钳夹持的夹持面,定位槽的开口朝上、且端部延伸至夹持面,定位槽中设有弹性件和至少两个定位块,每一定位块设有用于放置待加工的工件的定位孔,定位块与定位槽间隙配合,弹性件用于在虎钳夹持夹持面时、朝夹持面挤压定位块,以便将定位块压紧在虎钳的表面。本申请提供的多工位柔性夹具解决单个工件有效加工时间短、加工效率低、工人劳动强度大的问题,同时减少主轴频繁高速启、停时的磨损。(The invention discloses a multi-station flexible clamp which comprises a clamp body, wherein the clamp body is provided with a positioning groove and a clamping surface for clamping a vice, the opening of the positioning groove faces upwards, the end part of the positioning groove extends to the clamping surface, an elastic piece and at least two positioning blocks are arranged in the positioning groove, each positioning block is provided with a positioning hole for placing a workpiece to be machined, the positioning blocks are in clearance fit with the positioning groove, and the elastic piece is used for extruding the positioning blocks towards the clamping surface when the vice clamps the clamping surface so as to press the positioning blocks on the surface of the vice. The multi-station flexible clamp provided by the application solves the problems that the effective processing time of a single workpiece is short, the processing efficiency is low, and the labor intensity of workers is high, and reduces the abrasion of a main shaft during frequent high-speed starting and stopping.)
1. The utility model provides a flexible anchor clamps of multistation, its characterized in that, includes the anchor clamps body (1), the anchor clamps body (1) is equipped with constant head tank (11), supplies clamping face (13) of vice centre gripping, the opening of constant head tank (11) up, and the tip extends to clamping face (13), be equipped with elastic component and two at least locating pieces (2) in constant head tank (11), each locating piece (2) are equipped with locating hole (21) that are used for placing work piece (4) of treating processing, locating piece (2) with constant head tank (11) clearance fit, the elastic component is used for the vice centre gripping during clamping face (13), towards clamping face (13) extrusion locating piece (2), so that will locating piece (2) compress tightly the surface of vice.
2. A multi-station flexible clamp according to claim 1, wherein the side wall of the locating hole (21) comprises a C-shaped locating surface (25) for clearance fit with the outer circle of the workpiece (4), the C-shaped locating surface (25) has two parallel edges (26) spaced a predetermined distance apart, and the edges (26) are used for contact with a vice when the vice clamps the clamping surface (13) so that the vice pushes the flat surface of the workpiece (4) to a state coplanar with the clamping surface (13).
3. A multi-station flexible clamp according to claim 1, characterized in that the positioning holes (21) are stepped holes for placing workpieces (4) of different specifications.
4. A multi-station flexible clamp according to claim 1, wherein said positioning block (2) is provided with a mounting hole (23), and the end of said elastic member is provided in said mounting hole (23).
5. A multi-station flexible clamp according to claim 4, characterized in that said elastic element is a spring (3).
6. The multi-station flexible clamp according to claim 1, characterized in that the bottom of the positioning block (2) is provided with a limiting protrusion (22), and the bottom of the positioning groove (11) is provided with a limiting groove (12) matched with the limiting protrusion (22).
7. A multi-station flexible clamp according to claim 6, characterized in that said positioning slot (11) has a T-shaped cross section.
8. A multi-station flexible fixture according to any one of claims 1 to 7, characterized in that the clamping surfaces (13) comprise a left clamping surface and a right clamping surface which are oppositely distributed, the positioning slot (11) extends from the left clamping surface to the right clamping surface, two positioning blocks (2) are arranged in the same positioning slot (11), and the elastic member is arranged in the middle of two positioning blocks (2) in the same positioning slot (11).
Technical Field
The invention relates to the technical field of milling machining of machinery, in particular to a multi-station flexible clamp.
Background
Aerospace products require high mechanical precision on a workpiece, e.g. a specific type of product, the material of whichIs copper, outer diameter
Long and longThe excircle is provided with a flat surface, the end face of the part is provided with an inner hole, an eccentric small hole and a notch, the perpendicularity of the end face to the inner hole is 0.003mm, the perpendicularity of the flat surface on the excircle to the end face is 0.01mm, and the included angle between one edge of the notch and the normal line of the flat surface on the excircle is 28 degrees to 10 degrees, so that small size deviation in processing can seriously affect the use performance of the product.At present, the eccentric small holes and notches of the product are generally processed by the following three processing methods:
first, the vice clamps the excircle and the plano of part, alignment hole, processing eccentric aperture and breach, and the vice is easy to be pressed from both sides the excircle of hindering the product when actual operation, causes the batch nature to scrap.
And secondly, the outer circle of the part is sleeved by the opening sleeve, and the opening sleeve is clamped by three claws for processing. The method is used for aligning the inner hole of the part and the flat surface on the excircle of the part, and the angle of the part is out of tolerance or the product is scrapped due to the fact that the flat surface of the part is small, the alignment difficulty is high, and the error is large.
And thirdly, using a special tool, hexagonal boring an inner hole which is a few microns larger than the excircle size of the part, simultaneously exposing the plane of the part, clamping the tool by a vice, and aligning the inner hole and the plane of the part. The method is used for clamping once, machining one part and changing the tool for four times in total. The processing time was 8 minutes and 25 seconds. The clamping, tool changing, alignment and cleaning time is 7 minutes and 10 seconds, and the real effective processing time is 1 minute and 15 seconds. The disadvantages of this method are: effective cutting time is short, most of the cutting tools are used in auxiliary time, frequent tool changing causes great abrasion to a tool changing mechanism of a numerical control machine tool, the influence of frequent stop and start of high rotating speed of a main shaft on the main shaft of the machine tool is particularly great, and meanwhile, short-time alignment and clamping are also increased to the labor intensity of workers.
In summary, how to avoid damage to the workpiece, improve the processing efficiency, and reduce the labor amount of workers is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention aims to provide a multi-station flexible clamp, which solves the problems of short effective processing time, low processing efficiency and high labor intensity of workers of a single workpiece, and reduces the abrasion of a main shaft during frequent high-speed starting and stopping.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a flexible anchor clamps of multistation, includes the anchor clamps body, the anchor clamps body is equipped with the constant head tank, supplies the clamping face of vice centre gripping, the opening of constant head tank up, and the tip extends to the clamping face, be equipped with elastic component and two at least locating pieces in the constant head tank, each the locating piece is equipped with the locating hole that is used for placing the work piece of treating processing, the locating piece with constant head tank clearance fit, the elastic component is used for at the vice centre gripping during the clamping face, towards the clamping face extrusion the locating piece, so that will the locating piece compresses tightly the surface of vice.
Preferably, the side wall of the positioning hole comprises a C-shaped positioning surface which is used for being in clearance fit with the outer circle of the workpiece, the C-shaped positioning surface is provided with two parallel edges which are distributed at a preset interval, and the edges are used for being in contact with a vice when the vice clamps the clamping surface, so that the vice pushes the flat surface of the workpiece to be in a state of being coplanar with the clamping surface.
Preferably, the positioning hole is a stepped hole for placing workpieces of different specifications.
Preferably, the positioning block is provided with a mounting hole, and the end of the elastic element is arranged in the mounting hole.
Preferably, the elastic member is a spring.
Preferably, the bottom of the positioning block is provided with a limiting protrusion, and the bottom of the positioning groove is provided with a limiting groove matched with the limiting protrusion.
Preferably, the cross section of the positioning groove is T-shaped.
Preferably, the clamping surface comprises a left clamping surface and a right clamping surface which are distributed oppositely, the positioning groove extends from the left clamping surface to the right clamping surface, two positioning blocks are arranged in the same positioning groove, and the elastic part is arranged between the two positioning blocks in the same positioning groove.
In practical application, a workpiece to be machined is placed in a positioning hole of a positioning block, the positioning block is placed in a positioning groove of a fixture body, and the fixture body is fixed on a machining platform of a machining center. The tip of constant head tank extends to the specific clamping face of anchor clamps for the lateral wall of locating piece exposes in the vice side, and when vice centre gripping clamping face, the elastic component in the constant head tank utilizes self elastic restoring force to extrude the locating piece towards the direction of vice, and vice and elastic component cooperation are tight with the locating piece clamp, thereby the position of indirect fixed work piece.
First, because the lateral wall of locating piece laminates with the work piece mutually to the realization is to the fixed of work piece, consequently compares in the mode of the direct centre gripping work piece of prior art middle vice, has reduced the impaired risk of work piece.
Secondly, the elastic component provides the clearance for the locating piece to compress tightly the locating piece on the surface of vice, because the distance of keeping silent of vice is certain, just controllable, consequently the position of vice ability accurate control locating piece, and then the position of indirect location work piece. When clamping different batches of workpieces, the vice position is fixed, so that a plurality of batches of workpieces can be positioned at the same position, repeated alignment is not needed for different batches of workpieces, the alignment difficulty is reduced, and the alignment efficiency is improved.
Thirdly, because the multi-station flexible clamp is equipped with at least two locating blocks, and every locating block all can fix a work piece, therefore the multi-station flexible clamp can once only fix a position a plurality of work pieces, and need not fix a position alone every work piece to machining efficiency has been improved, workman's the amount of labour has been reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a multi-station flexible clamp in a workpiece clamping state;
FIG. 2 is a top view of the multi-station flexible fixture in a workpiece clamping state;
fig. 3 is a schematic view of the positioning block and the elastic member assembled together.
FIG. 4 is a top view of the clamp body;
FIG. 5 is a side view of the clamp body;
FIG. 6 is a schematic view of the elastic member;
FIG. 7 is a top view of the locating block;
FIG. 8 is a front view of the locating block;
FIG. 9 is a left side view of the locating block;
fig. 10 is a right side view of the locating block.
The reference numerals in figures 1 to 10 are:
the fixture comprises a fixture body 1, a
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.
The application provides a multistation flexible clamp, including the anchor clamps body 1, elastic component, locating
The anchor clamps body 1 need cooperate the vice to use together, and the vice has two to keep silent, and one is fixed vice jaw, another is movable vice jaw, and the size of anchor clamps body 1 is according to the vice design of keeping silent. The side wall of the outer side wall of the clamp body 1, which is matched with the vice, is called a clamping surface 13, the clamping surface 13 is generally a plane, the vice is provided with two jaws which are oppositely distributed, and the corresponding clamping surface 13 of the clamp body 1 comprises a left clamping surface and a right clamping surface which are oppositely distributed. In the actual design, the mutual verticality, parallelism and planeness of the appearance of the fixture body 1 are controlled within 0.01 mm.
The top surface of the fixture body 1 is provided with a
The fixture body 1 is used as a special tool for mass production, and needs to have high rigidity and wear resistance, and the material is preferably stainless steel (such as 2Cr13) in consideration of comprehensive cost, and the heat treatment hardness value is 38-42 HRC. In order to prevent the clamp body 1 from rusting and affecting the positioning accuracy, bluing is performed.
In actual processing, the processing method of the fixture body 1 can refer to the following steps:
(1) blanking;
(2) milling: vice clamping and multiple face turning milling hexagons, wherein the grinding allowance of each face is 0.2mm, and the verticality and the parallelism are ensured to be 0.1 mm;
(3) clamping: removing appearance burrs;
(4) wire cutting (fast): pressing by a vice, and keeping a finish machining allowance of 1mm on each surface of the
(5) clamping: removing burrs;
(6) heating: solid solution aging is 38-42 HRC;
(7) flat grinding: the blank of the fixture body is absorbed on the working table surface, each surface is flat ground, and the verticality and the parallelism flatness of 0.01mm are ensured;
(8) clamping: removing burrs;
(9) wire cutting (slow): pressing and mounting the blank of the fixture body, aligning the plane to jump within 0.01mm, and cutting the
(10) clamping: removing burrs;
(11) table: bluing;
(12) and (7) warehousing.
The
In the mass production process, hundreds of sliding needs to be carried out, so that the requirement on the wear resistance of the workpiece 4 is high, the
In actual processing, the processing method of the
(1) blanking;
(2) milling: clamping by a vice, milling a hexagonal boss and a limiting
(3) clamping: deburring;
(4) heating: solid solution aging is 38-42 HRC;
(5) flat grinding: clamping by a vice and flatly grinding each surface;
(6) clamping: deburring;
(7) d, milling: clamping by a vice twice, and milling and boring the
(8) clamping: deburring;
(9) table: bluing;
(10) and (7) warehousing.
The elastic member is arranged in the
The
In the actual processing, the processing method of the
(1) blanking;
(2) turning: winding, forming and cleaning;
(3) heating: stress relief tempering;
(4) clamping: cutting single pieces and correcting;
(5) heating: stress relief tempering;
(6) clamping: correcting;
(7) heating: oil temperature loading is carried out for 12 hours;
(8) clamping: setting and fine grinding the end face;
(9) table: surface passivation;
(10) quality inspection;
(11) and (7) warehousing.
The application provides a multistation flexible clamp cooperation numerical control machining center, vice, locator use. In actual operation, the vice is placed at the center of a workbench of a machining center and is pressed and fixed by a pressing plate; installing a positioner on the side surface of the vice; the
Firstly, because locating
Secondly, because the distance of keeping silent of vice is certain, and controllable, and locating
Thirdly, as the multi-station flexible fixture is provided with at least two
Further, for the circular workpiece 4 with the flat surface, the circumferential direction of the workpiece 4 has a C-shaped arc-shaped side wall and a flat surface, in a preferred embodiment provided by the present application, the side wall of the
Specifically, the side wall of the
In practice, when assembling the
Optionally, in practical use, because the specifications of the workpieces 4 are different, the positioning holes 21 can be set to be stepped holes capable of accommodating the workpieces 4 of different specifications, so that the workpieces 4 of different specifications can be machined.
Optionally, in order to facilitate installation of the
Optionally, in order to ensure that the
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The multi-station flexible clamp provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
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