CN218984014U - CNC machined part fixing jig - Google Patents
CNC machined part fixing jig Download PDFInfo
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- CN218984014U CN218984014U CN202220922362.6U CN202220922362U CN218984014U CN 218984014 U CN218984014 U CN 218984014U CN 202220922362 U CN202220922362 U CN 202220922362U CN 218984014 U CN218984014 U CN 218984014U
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Abstract
The utility model provides a CNC workpiece fixing jig which comprises a base plate, a base plate and a positioning plate, wherein a fourth negative pressure through hole is formed in the base plate, a third negative pressure through hole, a first negative pressure cavity, a first vacuum suction pipe and a plurality of second negative pressure through holes are formed in the base plate, a first adsorption through groove, a first negative pressure through hole and a positioning boss are formed in the positioning plate, the first vacuum suction pipe and the fourth negative pressure through hole can be connected with a vacuum negative pressure source, the vacuum negative pressure source sequentially adsorbs the positioning plate on the base plate through the first vacuum suction pipe, the first negative pressure cavity and the plurality of second negative pressure through holes, and the vacuum negative pressure source sequentially adsorbs CNC workpieces on the positioning plate through the fourth negative pressure through hole, the third negative pressure through hole, the first adsorption through groove and the first negative pressure through holes. The utility model not only can realize the recycling and quick switching of the fixed jig, reduce the manufacturing cost of the jig and improve the processing efficiency of products, but also can realize the accurate positioning and switch and process the products of different varieties on different multi-axis machines.
Description
Technical Field
The utility model belongs to the technical field of fixtures for CNC equipment, and particularly relates to a fixture for fixing CNC machined parts.
Background
Along with the improvement of aesthetic appearance of people, the visual effect of the appearance of the electronic product tends to be diversified and high-quality. At present, the texture, visual effect and hand feeling of the glass material are superior to those of the plastic material, and the display cover plate and the rear cover of the electronic product are increasingly made of the glass material, especially the glass cover plate with 2.5D and 3D structures is more and more demanded.
Because of the diversification and miniaturization of the glass cover plate product structure, the product varieties are required to be continuously switched in the production process in order to meet the demands of customers. However, the CNC processing mode of the traditional glass cover plate is that the fixed jig for positioning the glass cover plate needs to be replaced when a product is processed every time, and the fixed jig matched with the glass cover plate needs to be manufactured again, so that the problems of high consumption of semi-finished products of the jig, high manufacturing cost, time and labor consumption in disassembly and assembly and low product processing efficiency are caused. Furthermore, CNC machines currently used for processing glass cover plates have single-axis machines, double-axis machines and multi-axis machines, wherein the distances between the main shafts on the double-axis machines and the multi-axis machines are not uniform, which results in that the multiple jigs cannot be precisely positioned when being leveled and split, so that the fixed jigs can only be used on the fixed CNC machines and the fixed shafts.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present utility model provides a CNC workpiece fixing jig.
The utility model provides a CNC (computerized numerical control) workpiece fixing jig which is applied to a CNC machine tool; the fixed tool includes:
the positioning plate is used for receiving CNC machined parts; the positioning plate is provided with a first adsorption through groove, at least one first negative pressure through hole and at least one positioning boss, the first negative pressure through holes are arranged in one-to-one correspondence with the positioning bosses, and the first negative pressure through holes penetrate through the positioning plate;
the base plate is used for supporting the positioning plate and is positioned on the base plate through positioning pins; the base plate is provided with a first negative pressure cavity, a first vacuum suction pipe, a plurality of second negative pressure through holes and a third negative pressure through hole, and the first vacuum suction pipe and the plurality of second negative pressure through holes are communicated with the first negative pressure cavity;
the bottom plate is fixedly arranged on the CNC processing platform and used for supporting and fixing the backing plate; the bottom plate is provided with a fourth negative pressure through hole, and the fourth negative pressure through hole is communicated with the third negative pressure through hole;
the first vacuum air suction pipe, the first negative pressure cavity and the plurality of second negative pressure through holes are connected with a vacuum negative pressure source, and the positioning plate is adsorbed on the backing plate through the first vacuum air suction pipe, the first negative pressure cavity and the plurality of second negative pressure through holes which are in a negative pressure state; simultaneously, through being in the negative pressure state the fourth negative pressure through-hole, the third negative pressure through-hole, the first absorption through groove and the first negative pressure through-hole adsorb CNC machined part on the locating plate.
Compared with the prior art, the utility model has the beneficial effects that: the positioning plate and CNC machined parts are respectively fixed by utilizing independent vacuum negative pressure suction, namely, a first vacuum suction pipe, a first negative pressure cavity and a plurality of second negative pressure through holes which can be sequentially communicated with a vacuum negative pressure source are arranged on the base plate, so that a vacuum negative pressure suction first channel capable of adsorbing and fixing the positioning plate is formed on the base plate, a fourth negative pressure through hole capable of being communicated with the vacuum negative pressure source is arranged on the base plate, a third negative pressure through hole communicated with the fourth negative pressure through hole is arranged on the base plate, a first adsorption through groove and a first negative pressure through hole communicated with the third negative pressure through hole are arranged on the positioning plate, and a vacuum negative pressure suction second channel capable of adsorbing the CNC machined parts can be formed on the base plate, the base plate and the positioning plate.
Preferably, the first adsorption through grooves are staggered, and each first adsorption through groove is arranged among the plurality of second negative pressure through holes.
Preferably, a first sealing ring and a plurality of second sealing rings are arranged at the top of the base plate, the second sealing rings are arranged at the outer edges of the second negative pressure through holes, the first sealing rings are arranged at the outer edges of the areas occupied by the second negative pressure through holes, and the first sealing rings and the second sealing rings are used for sealing the cavity formed by overlapping the base plate and the positioning plate.
Preferably, the positioning plate is provided with a positioning boss and a first negative pressure through hole, the top surface of the positioning boss is provided with a second adsorption through groove, and the first negative pressure through hole is communicated with the second adsorption through groove and the first adsorption through groove.
Preferably, the positioning plate is provided with a plurality of positioning bosses and a plurality of first negative pressure through holes, and the positioning bosses and the first negative pressure through holes are arranged in one-to-one correspondence; the positioning boss is provided with an adsorption cavity, and the first negative pressure through hole is communicated with the adsorption cavity and the first adsorption through groove.
Preferably, the second negative pressure through hole comprises a plurality of adsorption holes arranged in an array.
Preferably, a second negative pressure cavity is dug at the top of the bottom plate, and the second negative pressure cavity and the first negative pressure cavity are correspondingly adapted.
Preferably, a third sealing ring and a fourth sealing ring are arranged at the top of the bottom plate, the third sealing ring is used for sealing the butt joint of the third negative pressure through hole and the fourth negative pressure through hole, and the fourth sealing ring is used for sealing a cavity formed by overlapping the bottom plate with the bottom plate.
Preferably, the positioning pin comprises a first positioning pin and a second positioning pin, the outer diameter of the first positioning pin is larger than that of the second positioning pin, and the positioning plate is provided with a first positioning hole and a second positioning hole which are respectively matched with the first positioning pin and the second positioning pin.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 3 is another cross-sectional view of a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 4 is a top view of a positioning plate in a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 5 is a bottom view of a positioning plate in a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 6 is a top view of a shim plate in a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 7 is a bottom view of a shim plate in a CNC workpiece fixture according to an embodiment of the present utility model;
FIG. 8 is a schematic diagram of a bottom plate of a CNC workpiece fixture according to an embodiment of the present utility model;
fig. 9 is a schematic structural diagram of a positioning plate in a CNC workpiece fixture according to a second embodiment of the present utility model.
Reference numerals illustrate:
10-CNC machining;
20-positioning plates, 201-first negative pressure through holes, 202-first positioning holes, 203-second positioning holes, 204-first adsorption through grooves, 21-positioning bosses, 211-second adsorption through grooves and 212-adsorption cavities;
30-backing plate, 301-first countersunk hole, 302-second negative pressure through hole, 303-third negative pressure through hole, 304-first negative pressure cavity, 31-first locating pin, 32-second locating pin, 33-first sealing ring, 34-second sealing ring and 35-first vacuum suction pipe;
40-bottom plate, 401-screw hole, 402-second counter bore, 403-second negative pressure cavity, 404-fourth negative pressure through hole, 41-second vacuum suction pipe, 42-third sealing ring, 43-fourth sealing ring.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended to illustrate embodiments of the utility model and should not be construed as limiting the utility model.
In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
The utility model provides a CNC workpiece fixing jig for solving the technical problems in the prior art, achieving the purposes of improving the processing efficiency of products and reducing the manufacturing cost of the jig, and is specifically described as follows.
Embodiment one:
as shown in fig. 1, a schematic structure diagram of a CNC workpiece fixture according to the present embodiment is shown, and the CNC workpiece fixture includes a positioning plate 20, a backing plate 30, and a bottom plate 40. Specifically, the bottom plate 40 is fixedly installed on the CNC processing platform through 4 bolts, the backing plate 30 is fixedly installed on the top surface of the bottom plate 40 through 6 bolts, and the positioning plate 20 is fixedly adsorbed on the top surface of the backing plate 30 through 2 positioning pins and vacuum negative pressure suction.
The CNC machined part fixing jig provided by the embodiment can respectively fix the adsorption positioning plate 20 and the CNC machined part 10 by utilizing two independent vacuum negative pressure air suction channels, wherein the CNC machined part 10 is a glass cover plate. Therefore, the CNC machining fixture can be recycled and rapidly switched, the manufacturing cost of the fixture is reduced, the machining efficiency of products is improved, accurate positioning can be realized, and products of different varieties can be switched and machined on different double-shaft machines and multiple-shaft machines, so that the universality is enhanced.
As shown in fig. 2, 3, 7 and 8, a second negative pressure cavity 403 is arranged in the middle of the top surface of the bottom plate 40, a fourth sealing ring groove (not labeled in the figures) is arranged on the top surface of the bottom plate 40 and at the outer edge of the second negative pressure cavity 403, and a fourth sealing ring 43 is arranged in the fourth sealing ring groove; 6 threaded holes 401 and 4 second countersunk holes 402 are formed in the periphery of the bottom plate 40 and at the outer edge of the second negative pressure cavity 403, and the bottom plate 40 can be fixedly installed on the CNC machining platform through the second countersunk holes 402; an L-shaped fourth negative pressure through hole 404 is arranged on the bottom plate 40, one end of the fourth negative pressure through hole 404 is arranged in the center of the bottom plate 40, the top surface of the fourth negative pressure through hole is consistent with the top surface of the bottom plate 40, the other end of the fourth negative pressure through hole 404 is arranged on one side of the bottom plate 40, a second vacuum suction pipe 41 is fixedly arranged on the side of the bottom plate 40, the second vacuum suction pipe 41 is in threaded connection with the fourth negative pressure through hole 404, and the second vacuum suction pipe 41 can be connected with a vacuum negative pressure source on a CNC processing platform; a third seal ring groove (not shown) is provided at the outer edge of one end of the fourth negative pressure through hole 404 near the second negative pressure chamber 403, and a third seal ring 42 is installed in the third seal ring groove.
Secondly, a first concave negative pressure cavity 304 is arranged in the middle of the bottom surface of the backing plate 30, the circumferential size of the first negative pressure cavity 304 is consistent with that of a second negative pressure cavity 403 on the bottom plate 40, namely, the first negative pressure cavity 304 and the second negative pressure cavity 403 are correspondingly and adaptively arranged, so that the first negative pressure cavity 304 is completely covered on the second negative pressure cavity 403; at the periphery of the backing plate 30 and at the outer edge of the first negative pressure cavity 304, 6 first counter holes 301 are provided, and the 6 first counter holes 301 are adapted to 6 threaded holes 401 on the bottom plate 40 in a one-to-one correspondence manner, so that the backing plate 30 is fixedly mounted on the top surface of the bottom plate 40 through bolts, and sealing between the second negative pressure cavity 403 on the bottom plate 40 and the first negative pressure cavity 304 on the backing plate 30 is realized through a fourth sealing ring 43 on the bottom plate 40.
Meanwhile, a third negative pressure through hole 303 is arranged in the center of the backing plate 30, the bottom surface of the third negative pressure through hole 303 is consistent with the bottom surface of the backing plate 30, when the backing plate 30 is fixedly arranged on the top surface of the bottom plate 40 through bolts, the third negative pressure through hole 303 is communicated with a fourth negative pressure through hole 404 on the bottom plate 40, and the third sealing ring 42 on the bottom plate 40 is utilized to realize the sealing between the third negative pressure through hole 303 on the backing plate 30 and the fourth negative pressure through hole 404 on the bottom plate 40, namely, the third negative pressure through hole 303 is communicated with the fourth negative pressure through hole 404 but is not communicated with the first negative pressure cavity 304 and the second negative pressure cavity 403; a first vacuum suction pipe 35 is fixedly installed at one side of the backing plate 30, and the first vacuum suction pipe 35 can be communicated with the first negative pressure cavity 304 and can be connected with a vacuum negative pressure source on the CNC processing platform.
A plurality of second negative pressure through holes 302 are formed in the middle of the top surface of the backing plate 30, and the plurality of second negative pressure through holes 302 are arranged in an array and are communicated with the first negative pressure cavity 304; a second seal ring groove (not shown) is provided on the top surface of the backing plate 30 and on the outer edge of each second negative pressure through hole 302, and a second seal ring 34 is installed in the second seal ring groove; a first seal ring groove (not shown) is arranged on the top surface of the backing plate 30 and on the outer edges of all the second negative pressure through holes 302, a first seal ring 33 is arranged in the first seal ring groove, and separation among the plurality of second negative pressure through holes 302 can be realized by using the first seal ring 33 and a plurality of second seal rings 34; a first positioning pin hole and a second positioning pin hole (not shown in the figure) are formed in the top surface of the backing plate 30 and at the outer edges of all the second negative pressure through holes 302, the outer diameter of the first positioning pin hole is larger than that of the second positioning pin hole, and a first positioning pin 31 and a second positioning pin 32 are fixedly mounted in the first positioning pin hole and the second positioning pin hole respectively, so that the direction of the backing plate 30 can be conveniently identified and the positioning of the positioning plate 20 on the X axis and the Y axis can be conveniently realized.
In other embodiments, to firmly adsorb and support the positioning plate 20 and ensure positioning accuracy of the positioning plate 20 on the Z axis, each second negative pressure through hole 302 may include a plurality of adsorption holes (not labeled in the figure) arranged in an array, i.e. the diameters of the adsorption holes are smaller.
As shown in fig. 2, 4, 5 and 6, a first adsorption through groove 204 is arranged in the middle of the bottom surface of the positioning plate 20, and the first adsorption through grooves 204 are staggered and are located among a plurality of second negative pressure through holes 302, that is, the first adsorption through grooves 204 are not communicated with the second negative pressure through holes 302; a first negative pressure through hole 201 is arranged at the center of the positioning plate 20, the first negative pressure through hole 201 is communicated with a first adsorption through groove 204, and when the positioning plate 20 is fixedly adsorbed on the top surface of the backing plate 30, the first negative pressure through hole 201 can be communicated with a third negative pressure through hole 303 on the backing plate 30 and is communicated with the first adsorption through groove 204; a first positioning hole 202 and a second positioning hole 203 are provided at the periphery of the bottom surface of the positioning plate 20, and the first positioning hole 202 and the second positioning hole 203 are respectively matched with a first positioning pin 31 and a second positioning pin 32 on the backing plate 30, so that the positioning plate 20 is mounted on the top surface of the backing plate 30 by using the first positioning pin 31 and the second positioning pin 32.
In this embodiment, when the vacuum negative pressure source is connected to the first vacuum air suction pipe 35 and sucks air, the vacuum negative pressure source can sequentially pass through the first vacuum air suction pipe 35, the first negative pressure cavity 304 and the plurality of second negative pressure through holes 302 to fixedly adsorb the positioning plate 20 on the top surface of the backing plate 30, so as to realize positioning of the positioning plate 20 on the Z axis; meanwhile, the first sealing ring 33 and the plurality of second sealing rings 34 mounted on the backing plate 30 can seal the plurality of second negative pressure through holes 302, so that the plurality of second negative pressure through holes 302 are not communicated with the first adsorption through groove 204 and the first negative pressure through hole 201.
Finally, a positioning boss 21 adapted to the CNC workpiece 10 to be processed is disposed at the top of the positioning plate 20, a second adsorption through groove 211 is disposed on the top surface of the positioning boss 21, and the second adsorption through groove 211 is communicated with the first negative pressure through hole 201, that is, the first adsorption through groove 204 and the second adsorption through groove 211 are both communicated with the first negative pressure through hole 201.
In this embodiment, when the CNC workpiece 10 is placed on the top surface of the positioning boss 21, and when the vacuum negative pressure source is connected to the second vacuum suction pipe 41 and suctions air, the vacuum negative pressure source can sequentially pass through the second vacuum suction pipe 41, the fourth negative pressure through hole 404, the third negative pressure through hole 303, the first negative pressure through hole 201 and the second suction through groove 211 to suck and fix the CNC workpiece 10 on the top surface of the positioning plate 20, so as to facilitate CNC processing.
Embodiment two:
as shown in fig. 9, a schematic structural diagram of the positioning plate 20 in the CNC workpiece fixture according to the present embodiment is shown. The CNC workpiece fixing jig in this embodiment is substantially identical to the CNC workpiece fixing jig in the first embodiment in structure, except that: the structure of the locating plate 20 is adapted to the structure of the CNC work piece 10 to be processed.
Specifically, when the size of the CNC workpiece 10 is relatively small and the CNC multiple pieces of machining are required, a plurality of positioning bosses 21 adapted to the CNC workpiece 10 to be machined are provided on the top of a positioning plate 20 adapted to the CNC workpiece 10, and an adsorption cavity 212 is provided on the top surface of the positioning boss 21; meanwhile, a first adsorption through groove 204 is also arranged in the middle of the bottom surface of the positioning plate 20, and the first adsorption through grooves 204 are staggered and positioned among the plurality of second negative pressure through holes 302, namely, the first adsorption through grooves 204 and the second negative pressure through holes 302 are not communicated; the positioning plate 20 is provided with a first negative pressure through hole 201 at the center corresponding to the positioning boss 21, and the first negative pressure through hole 201 is communicated with the adsorption cavity 212 and the first adsorption through groove 204.
In this embodiment, when the CNC workpiece 10 is placed on the top surface of the positioning boss 21, and when the vacuum negative pressure source is connected to the second vacuum suction pipe 41 and suctions air, the vacuum negative pressure source can sequentially pass through the second vacuum suction pipe 41, the fourth negative pressure through hole 404, the third negative pressure through hole 303, the first suction through groove 204, the first negative pressure through hole 201 and the suction cavity 212 to suction and fix the CNC workpiece 10 on the top surface of the positioning plate 20, so as to facilitate CNC processing.
In the practical application process, when the model of the CNC machined part 10 is changed, only the locating plate 20 needs to be replaced, and the bottom plate 40 and the base plate 30 do not need to be replaced, so that the recycling and the quick switching of the CNC machining jig are realized, the manufacturing cost of the jig is reduced, and the machining efficiency of products is improved.
On the other hand, the utility model also provides a manufacturing method of the CNC workpiece fixing jig, which specifically comprises the following steps:
s1, leveling the machined bottom plate 40, and fixedly mounting the machined bottom plate on a CNC machining platform through bolts.
The middle part of the top surface of the machined bottom plate 40 is provided with a second concave negative pressure cavity 403, the top surface of the bottom plate 40 is provided with a fourth sealing ring groove at the outer edge of the second negative pressure cavity 403, the periphery of the bottom plate 40 is provided with 6 threaded holes 401 and 4 second countersunk holes 402 at the outer edge of the second negative pressure cavity 403, the bottom plate 40 is provided with an L-shaped fourth negative pressure through hole 404, one end of the fourth negative pressure through hole 404 is arranged at the center of the bottom plate 40, the top surface of the fourth negative pressure through hole is consistent with the top surface of the bottom plate 40, the other end of the fourth negative pressure through hole 404 is arranged at one side of the bottom plate 40, a second vacuum suction pipe 41 is fixedly arranged at the side of the bottom plate 40, the second vacuum suction pipe 41 is in threaded connection with the fourth negative pressure through hole 404, and a third sealing ring groove is arranged at the outer edge of one end of the fourth negative pressure through hole 404, which is close to the second negative pressure cavity 403.
It should be noted that, for a biaxial machine or a multiaxial machine, after confirming the distance between the main shafts on the biaxial machine or multiaxial machine, two bottom plates 40 may be correspondingly installed on the biaxial machine, or a plurality of bottom plates 40 may be correspondingly installed on the multiaxial machine, that is, one main shaft on the biaxial machine or multiaxial machine corresponds to one bottom plate 40. The jig corresponding to one spindle is described below.
S2, dividing the bottom plate 40 fixedly installed on the CNC processing platform and corresponding to a certain spindle, setting the origin of the bottom plate 40 and storing the origin.
And S3, respectively installing a third sealing ring 42 and a fourth sealing ring 43 in the third sealing ring groove and the fourth sealing ring groove, and fixedly installing the semi-finished product of the backing plate 30 on the top surface of the bottom plate 40 through bolts.
The middle part of the bottom surface of the base plate semi-finished product is provided with a first concave negative pressure cavity 304, the circumferential size of the first negative pressure cavity 304 is consistent with that of a second negative pressure cavity 403 on the base plate 40, 6 first counter bores 301 are arranged at the periphery of the base plate 30 and at the outer edge of the first negative pressure cavity 304, the 6 first counter bores 301 are in one-to-one correspondence with 6 threaded holes 401 on the base plate 40, so that the base plate 30 is fixedly installed on the top surface of the base plate 40 through bolts, and the fourth sealing ring 43 on the base plate 40 is utilized to realize sealing between the second negative pressure cavity 403 on the base plate 40 and the first negative pressure cavity 304 on the base plate semi-finished product; meanwhile, a third negative pressure through hole 303 is arranged in the center of the base plate semi-finished product, the bottom surface of the third negative pressure through hole 303 is consistent with the bottom surface of the base plate 30, when the base plate semi-finished product is fixedly arranged on the top surface of the base plate 40 through bolts, the third negative pressure through hole 303 is communicated with a fourth negative pressure through hole 404 on the base plate 40, and the third negative pressure through hole 303 on the base plate semi-finished product is sealed with the fourth negative pressure through hole 404 on the base plate 40 by a third sealing ring 42 on the base plate 40; a first vacuum suction pipe 35 is fixedly arranged on one side of the base plate semi-finished product, and the first vacuum suction pipe 35 can be communicated with a first negative pressure cavity 304; a plurality of second negative pressure through holes 302 are formed in the middle of the top surface of the base plate semi-finished product, the second negative pressure through holes 302 are arranged in an array and are communicated with the first negative pressure cavity 304, second sealing ring grooves are formed in the outer edge of each second negative pressure through hole 302 in the top surface of the base plate semi-finished product, and first sealing ring grooves are formed in the outer edges of all second negative pressure through holes 302 in the top surface of the base plate semi-finished product.
In other embodiments, to firmly adsorb and support the positioning plate 20 and ensure positioning accuracy of the positioning plate 20 on the Z axis, each second negative pressure through hole 302 may include a plurality of adsorption holes (not labeled in the figure) arranged in an array, i.e. the diameters of the adsorption holes are smaller.
S4, processing a first positioning pin hole and a second positioning pin hole on the top surface of the semi-finished product of the backing plate and at the outer edges of all the second negative pressure through holes 302 to form the backing plate 30 by taking the origin set in the step S2 as a reference, wherein the outer diameter of the first positioning pin hole is larger than that of the second positioning pin hole, then installing the first positioning pin 31 and the second positioning pin 32 in the first positioning pin hole and the second positioning pin hole respectively so as to conveniently identify the direction of the backing plate 30 and realize the positioning of the positioning plate 20 on the X axis and the Y axis, and then installing the first sealing ring 33 and the plurality of second sealing rings 34 in the first sealing ring groove and the second sealing ring groove correspondingly so as to realize the separation among the plurality of second negative pressure through holes 302.
S5, mounting the semi-finished product of the positioning plate on the top surface of the base plate 30 through the first positioning pin 31 and the second positioning pin 32, and connecting the first vacuum suction pipe 35 with a vacuum negative pressure source, so that the vacuum negative pressure source fixedly adsorbs the semi-finished product of the positioning plate on the top surface of the base plate 30 through the first vacuum suction pipe 35, the first negative pressure cavity 304 and the plurality of second negative pressure through holes 302 in sequence, thereby realizing the positioning of the semi-finished product of the positioning plate on the Z axis; meanwhile, the first sealing ring 33 and the plurality of second sealing rings 34 mounted on the backing plate 30 can seal the plurality of second negative pressure through holes 302, so that the plurality of second negative pressure through holes 302 are not communicated with the first adsorption through groove 204 and the first negative pressure through hole 201.
Wherein, a first adsorption through groove 204 is pre-processed in the middle of the bottom surface of the positioning plate semi-finished product, the first adsorption through grooves 204 are crisscrossed and arranged among a plurality of second negative pressure through holes 302 and can be communicated with a third negative pressure through hole 303, a first positioning hole 202 and a second positioning hole 203 are arranged on the periphery of the bottom surface of the positioning plate semi-finished product to form a positioning plate 20, and the first positioning hole 202 and the second positioning hole 203 are respectively matched with a first positioning pin 31 and a second positioning pin 32 on a backing plate 30 so as to utilize the first positioning pin 31 and the second positioning pin 32 to install the positioning plate 20 on the top surface of the backing plate 30.
S6, processing at least one first negative pressure through hole 201 and at least one positioning boss 21 on the semi-finished positioning plate by taking the origin set in the step S2 as a reference to form the positioning plate 20, wherein the positioning boss 21 is matched with the CNC machined part 10.
Specifically, when the CNC workpiece 10 is large in size and suitable for CNC monolithic processing, as applied to the CNC workpiece 10 in fig. 1, after the positioning plate semi-finished product is fixedly adsorbed on the backing plate 30 by the vacuum negative pressure source, a positioning boss 21 adapted to the CNC workpiece 10 is processed on top of the positioning plate semi-finished product, and a second adsorption through groove 211 is processed on top of the positioning boss 21; meanwhile, a first negative pressure through hole 201 is processed in the center of the positioning plate semi-finished product to form the positioning plate 20, the first negative pressure through hole 201 is communicated with the first adsorption through groove 204 and the second adsorption through groove 211, and when the positioning plate 20 is fixedly adsorbed on the top surface of the backing plate 30, the first negative pressure through hole 201 can be communicated with a third negative pressure through hole 303 on the backing plate 30. At this time, when the CNC workpiece 10 is placed on the top surface of the positioning boss 21, and when the vacuum negative pressure source is connected to the second vacuum suction pipe 41 and suctions air, the vacuum negative pressure source can sequentially pass through the second vacuum suction pipe 41, the fourth negative pressure through hole 404, the third negative pressure through hole 303, the first negative pressure through hole 201 and the second suction through groove 211 to suck and fix the CNC workpiece 10 on the top surface of the positioning plate 20.
When the size of the workpiece 10 to be CNC is small and suitable for CNC multi-piece machining, as applied to the CNC workpiece 10 in fig. 9, after the semi-finished product of the positioning plate is fixedly adsorbed on the backing plate 30 by the vacuum negative pressure source, a plurality of positioning bosses 21 adapted to the CNC workpiece 10 to be machined are machined on the top of the semi-finished product of the positioning plate, and an adsorption cavity 212 is machined on the top surface of the positioning bosses 21; meanwhile, a first negative pressure through hole 201 is machined on the positioning plate 20 and corresponds to the center of the positioning boss 21, the first negative pressure through hole 201 is communicated with the adsorption cavity 212 and the first adsorption through groove 204, and when the positioning plate 20 is fixedly adsorbed on the top surface of the backing plate 30, the first negative pressure through hole 201 and the first adsorption through groove 204 can be communicated with a third negative pressure through hole 303 on the backing plate 30. At this time, when the CNC workpiece 10 is placed on the top surface of the positioning boss 21, and when the vacuum negative pressure source is connected to the second vacuum suction pipe 41 and suctions air, the vacuum negative pressure source can sequentially pass through the second vacuum suction pipe 41, the fourth negative pressure through hole 404, the third negative pressure through hole 303, the first suction through groove 204, the first negative pressure through hole 201 and the suction chamber 212 to suck and fix the CNC workpiece 10 on the top surface of the positioning plate 20.
Finally, after the fixture for fixing the CNC workpiece is machined, the origin set in the step S2 can be used as a reference to carry out CNC machining on the CNC workpiece 10. It should be noted that, when the products of different varieties are to be switched on the same spindle of the same machine, only the positioning plate 20 is required to be replaced, and the bottom plate 40 and the base plate 30 are not required to be replaced; meanwhile, CNC machining of different types of CNC workpieces 10 can be performed simultaneously on a biaxial machine or a multiaxial machine, and only the fixed fixture of the CNC workpiece corresponding to each spindle needs to be ensured to be based on the origin set in the step S2. In addition, when the first CNC processing of other new products is needed, the matched positioning plate is processed according to the steps S5 and S6.
The CNC workpiece fixing jig provided by the embodiment of the utility model not only can realize the recycling and quick switching of the CNC workpiece fixing jig, reduce the manufacturing cost of the jig and improve the processing efficiency of products, but also can realize accurate positioning and switching processing of products of different varieties on different double-shaft machines and multi-shaft machines.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. A CNC machined part fixing jig, which is applied to a CNC machine tool; characterized by comprising the following steps:
the positioning plate is used for receiving CNC machined parts; the positioning plate is provided with a first adsorption through groove, at least one first negative pressure through hole and at least one positioning boss, the first negative pressure through holes are arranged in one-to-one correspondence with the positioning bosses, and the first negative pressure through holes penetrate through the positioning plate;
the base plate is used for supporting the positioning plate and is positioned on the base plate through positioning pins; the base plate is provided with a first negative pressure cavity, a first vacuum suction pipe, a plurality of second negative pressure through holes and a third negative pressure through hole, and the first vacuum suction pipe and the plurality of second negative pressure through holes are communicated with the first negative pressure cavity;
the bottom plate is fixedly arranged on the CNC processing platform and used for supporting and fixing the backing plate; the bottom plate is provided with a fourth negative pressure through hole, and the fourth negative pressure through hole is communicated with the third negative pressure through hole;
the first vacuum air suction pipe, the first negative pressure cavity and the plurality of second negative pressure through holes are connected with a vacuum negative pressure source, and the positioning plate is adsorbed on the backing plate through the first vacuum air suction pipe, the first negative pressure cavity and the plurality of second negative pressure through holes which are in a negative pressure state; simultaneously, through being in the negative pressure state the fourth negative pressure through-hole, the third negative pressure through-hole, the first absorption through groove and the first negative pressure through-hole adsorb CNC machined part on the locating plate.
2. The CNC workpiece fixing jig according to claim 1, wherein the first adsorption through grooves are staggered, and each first adsorption through groove is disposed between a plurality of the second negative pressure through holes.
3. The CNC workpiece fixing jig according to claim 1 or 2, wherein a first sealing ring and a plurality of second sealing rings are arranged at the top of the backing plate, the second sealing rings are arranged at the outer edges of the second negative pressure through holes, the first sealing rings are arranged at the outer edges of the areas occupied by the plurality of second negative pressure through holes, and the first sealing rings and the plurality of second sealing rings are used for sealing a cavity formed by overlapping the backing plate and the positioning plate.
4. The CNC workpiece fixing jig according to claim 1 or 2, wherein the positioning plate is provided with one positioning boss and one first negative pressure through hole, the top surface of the positioning boss is provided with a second adsorption through groove, and the first negative pressure through hole is communicated with the second adsorption through groove and the first adsorption through groove.
5. The CNC workpiece fixing jig according to claim 1 or 2, wherein the positioning plate is provided with a plurality of positioning bosses and a plurality of first negative pressure through holes, and the positioning bosses are arranged in one-to-one correspondence with the first negative pressure through holes; the positioning boss is provided with an adsorption cavity, and the first negative pressure through hole is communicated with the adsorption cavity and the first adsorption through groove.
6. The CNC workpiece fixture of claim 1 or 2, wherein the second negative pressure through hole comprises a plurality of suction holes arranged in an array.
7. The CNC workpiece fixing jig according to claim 1, wherein a second negative pressure cavity is dug at the top of the bottom plate, and the second negative pressure cavity is relatively adapted to the first negative pressure cavity.
8. The CNC workpiece fixing jig according to claim 1 or 7, wherein a third sealing ring and a fourth sealing ring are provided on the top of the base plate, the third sealing ring is used for sealing a joint of the third negative pressure through hole and the fourth negative pressure through hole, and the fourth sealing ring is used for sealing a cavity formed by overlapping the base plate and the base plate.
9. The CNC workpiece fixing jig according to claim 1, wherein the positioning pin comprises a first positioning pin and a second positioning pin, the outer diameter of the first positioning pin is larger than that of the second positioning pin, and the positioning plate is provided with a first positioning hole and a second positioning hole respectively matched with the first positioning pin and the second positioning pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922362.6U CN218984014U (en) | 2022-04-20 | 2022-04-20 | CNC machined part fixing jig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922362.6U CN218984014U (en) | 2022-04-20 | 2022-04-20 | CNC machined part fixing jig |
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| CN218984014U true CN218984014U (en) | 2023-05-09 |
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| CN202220922362.6U Active CN218984014U (en) | 2022-04-20 | 2022-04-20 | CNC machined part fixing jig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654280A (en) * | 2022-04-20 | 2022-06-24 | 抚州联创恒泰光电有限公司 | CNC (computer numerical control) workpiece fixing jig and manufacturing method thereof |
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2022
- 2022-04-20 CN CN202220922362.6U patent/CN218984014U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654280A (en) * | 2022-04-20 | 2022-06-24 | 抚州联创恒泰光电有限公司 | CNC (computer numerical control) workpiece fixing jig and manufacturing method thereof |
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