CN113146311A

CN113146311A - Adjustable clamping mechanism for assisting machining of numerical control milling machine

Info

Publication number: CN113146311A
Application number: CN202110465758.2A
Authority: CN
Inventors: 杨桩; 李再兴; 姚庆迟
Original assignee: Shenzhen Yang Nc Machine Tool Co ltd
Current assignee: Shenzhen Yang Nc Machine Tool Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-07-23
Anticipated expiration: 2041-04-28
Also published as: CN113146311B

Abstract

The invention discloses an adjustable clamping mechanism for assisting machining of a numerical control milling machine, which comprises an assembly table top arranged in cooperation with the table top of the milling machine, wherein a group of bearing turntables is rotatably arranged on the upper end face of the assembly table top, a plurality of groups of limiting units for positioning workpieces to be machined are annularly distributed on the periphery of the bearing turntables, the adjusting directions of the plurality of groups of limiting units face the axis of the bearing turntables from the edges of the assembly table top, each limiting unit comprises at least one group of fixture block main body I and a plurality of groups of limiting die holders, a first sliding rail matched with the first fixture block main body is arranged on the upper end face of the assembly table top, the first fixture block main body is fed along the first sliding rail, at least two groups of limiting die holders are arranged in the same group of limiting units, a second sliding rail for adjusting the limiting die holders is arranged on the assembly table top, each limiting die holder comprises a second fixture block main body, and a group of bending parts is arranged at the top of the second fixture block main body. This be used for supplementary adjustable clamping mechanism of numerically controlled fraise machine processing, rational in infrastructure, easily realize recommending the wide use to the convenient fixing of work piece.

Description

Adjustable clamping mechanism for assisting machining of numerical control milling machine

Technical Field

The invention belongs to the technical field of milling machine fixtures (B23Q 3/08), and particularly relates to an adjustable clamping mechanism for machining assistance of a numerical control milling machine.

Background

The Numerical control milling machine is also called CNC (computer Numerical control) milling machine. English means a milling machine controlled by an electronic counter. The numerical control milling machine is an automatic processing device developed on the basis of a common milling machine, the processing technologies of the two are basically the same, and the structures are somewhat similar. The numerical control milling machine is divided into two categories, namely a tool magazine without tool magazine and a tool magazine with tool magazine. Wherein the numerical control milling machine with the tool magazine is also called as a machining center.

The numerical control milling machine is a numerical control machine with a strong processing function, a rapidly developed processing center, a flexible processing unit and the like are generated on the basis of the numerical control milling machine and a numerical control boring machine, and the milling mode cannot be separated from the milling mode. The shape of the machined surface of the milling machine is generally composed of straight lines, arcs or other curves. The ordinary milling machine operator follows the requirements of the pattern. The relative position between the cutter and the workpiece is continuously changed, and then the cutter is matched with the selected rotation speed of the milling cutter to cut the workpiece, so that various workpieces with different shapes can be machined. Before cutting, a workpiece to be machined needs to be clamped and positioned, so that the stability of a product is ensured, and the precision of washing and cutting machining is ensured. Like "numerical control milling machine fixture" of publication No. CN109955094A, it discloses one kind and adorns the pressure strip at the locating piece top, and the rethread is rotatory locking screw to drive the latch segment and is moved down and press from both sides tight part, thereby realize location from top to bottom, guarantee positional stability and improve the machining precision, the device structure is ingenious powerful, can be in order to realize the quick clamping to the part through the cylinder, very big improvement the efficiency of processing has reduced operating personnel's intensity of labour, the stability of the precision of processing has been ensured with positioning mechanism from top to bottom to the while.

However, in specific implementation operation, aiming at fixing of products with different shapes, the fixing is limited in a lower supporting mode, and the method has no high applicability.

Disclosure of Invention

The invention aims to provide an adjustable clamping mechanism for machining assistance of a numerical control milling machine, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an adjustable clamping mechanism for assisting machining of a numerical control milling machine comprises an assembly table board which is installed in a matching manner with a table board of the milling machine;

the upper end face of the assembling table face is rotatably provided with a group of bearing rotary tables, a plurality of groups of limiting units for positioning workpieces to be processed are distributed on the periphery of each bearing rotary table in an annular mode, the adjusting directions of the plurality of groups of limiting units are towards the axis of each bearing rotary table from the edge of the assembling table face, and each limiting unit comprises at least one group of first fixture block main bodies and a plurality of groups of limiting mold bases.

Preferably, the bearing turntable is embedded in the assembly table surface, the height of the table surface of the bearing turntable is slightly higher than the surface of the assembly table surface, the bottom of the bearing turntable is provided with a roller structure which is matched with the assembly table surface in a rolling manner, and the angle adjustment is realized by the driving of a corner motor.

Preferably, the upper end surface of the assembly table is provided with a first sliding rail adapted to the first fixture block body, the first fixture block body feeds along the first sliding rail, the first fixture block body is provided with a group of first clamping surfaces facing the bearing turntable, and the first clamping surfaces are configured to adapt to the peripheral contour of the workpiece to be machined.

Preferably, the limiting die holders are provided with at least two groups of limiting units in the same group, the assembly table top is provided with a second sliding rail for adjusting the limiting die holders, the limiting die holders comprise a second fixture block main body, the top of the second fixture block main body is provided with a group of bending parts, the second fixture block main body is provided with a group of second clamping surfaces facing the bearing turntable, and the second clamping surfaces are configured to adapt to the peripheral contour of the workpiece to be processed.

Preferably, one corner of the second fixture block body is provided with an oblique opening, an assembly slideway for mounting the oblique abutting part is formed in the oblique opening, the end part of the oblique abutting part is connected with the bent part through the buffer pile, and the oblique abutting part is abutted to the upper surface of the workpiece along the assembly slideway under the adjustment of the driving mechanism.

Preferably, two sets of guide rails are symmetrically configured on the upper end surface of the oblique abutting member, an engaging groove is formed above the guide rails, and an abutting portion is configured at the bottom end of the oblique abutting member.

Preferably, the driving mechanism for adjusting the oblique abutting member is a set of driving shafts, the two fixture block bodies are symmetrically provided with two abutting lugs capable of being rotatably connected with the driving shafts above the oblique opening, each driving shaft is provided with two sets of transmission gears which are mutually meshed with the meshing grooves above the guide rails, the end parts of the driving shafts are provided with driven gears, one side of each fixture block body is embedded with a set of transmission motors, and the motor shafts of the transmission motors are provided with driving gears meshed with the driven gears.

Preferably, the buffer piles are symmetrically provided with two groups, each group of buffer piles comprises a plugging end fixedly connected with the bending part, a sleeve screwed with the end part of the plugging end and a buffer shaft arranged in the sleeve, and a chamber for accommodating the buffer shaft is formed in the sleeve.

Preferably, the buffer shaft has a set of disk-shaped end portions, and a set of springs is sleeved below the end portions, the sleeve end portion is configured with a house opening for limiting the end portion of the spring, the end portion of the buffer shaft extends out of the chamber and is configured with a threaded end, and the buffer shaft is connected and assembled with the oblique abutting piece through the threaded end.

The invention has the technical effects and advantages that: the adjustable clamping mechanism for the machining assistance of the numerical control milling machine benefits from the configuration of a plurality of groups of limiting units, wherein a fixture block main body is combined with a limiting die holder to flexibly limit a workpiece to be machined, the adjusting direction of the fixture block main body is that the edge of an assembly table surface faces to the axis of a bearing turntable, and a fixture block main body is adapted to the edge of the workpiece to be machined or the angle of a product and is combined with the limiting die holder to realize the flexible limiting of the product; the first clamping surface is adapted to the peripheral contour of the workpiece to be machined and can be used for angle limiting or edge limiting, and the second clamping surface is adapted to the peripheral contour of the workpiece to be machined and ensures the clamping stability; the mode that the bearing turntable can be rotatably installed is suitable for the adjustment requirement of a product in a non-clamping state; the fixture block main body II is provided with an extensible inclined abutting part, and can realize abutting limitation on the surface of a workpiece to be processed under the adjustment of the driving mechanism, so that the stability of product edge limitation in the cutting process is further ensured, and the possibility of longitudinal jumping of the product is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a first fixture block body according to the present invention;

FIG. 3 is a schematic structural view of a limiting die holder according to the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 3 at A according to the present invention;

FIG. 5 is a side view of the angled abutment member of the present invention;

fig. 6 is a schematic cross-sectional view of a buffer pile according to the present invention.

In the figure: the fixture comprises an assembly table top 1, a bearing turntable 2, a fixture body I3, a fixture rail I301, a fixture clamping surface I302, a limiting die holder 4, a slide rail II 401, a fixture body II 5, a bending part 501, a fixture clamping surface II 502, an assembly slideway 503, an abutting lug 504, an inclined abutting part 6, a guide rail 601, an engagement groove 60101, an abutting part 602, a buffer pile 7, a driving shaft 8, a transmission gear 801, a driven gear 802, a transmission motor 9, a driving gear 901, a blocking end 10, a sleeve 11, a cavity 1101, a buffer shaft 12 and a spring 1201.

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.

In order to realize flexible fixing of products, the invention provides an adjustable clamping mechanism for machining assistance of a numerical control milling machine, which comprises an assembly table board 1 matched with the table board of the milling machine for installation, in the embodiment shown in figure 1, the adjustable clamping mechanism provided by the invention selects the assembly table board 1 with three groups of limiting units, and is provided with a group of fixture block main bodies I3 and four groups of limiting mold bases 4, wherein the limiting mold bases 4 are paired in pairs, namely two groups of limiting mold bases 4 are a group of limiting units, the driving of the fixture block main bodies I3 and the limiting mold bases 4 is preferably hydraulic equipment or pneumatic equipment, so that the fixture block main bodies respectively displace along a first slide rail 301 or a second slide rail 401, and the configuration of the plurality of groups of limiting units is benefited, wherein the fixture block main bodies I3 can flexibly limit workpieces to be machined by combining with the limiting mold bases 4, and the edges of the assembly table board 1 face in the adjusting direction face faces to the axis of a bearing turntable 2, the fixture block main body I3 adapts to the edge of a workpiece to be processed or the corner of a product, and flexible limiting of the product is realized by combining with the limiting die holder 4;

the upper end surface of the assembly table top 1 is rotatably provided with a group of bearing turntables 2, the periphery of the bearing turntables 2 is annularly provided with a plurality of groups of limiting units for positioning workpieces to be processed, the adjusting directions of the plurality of groups of limiting units are all towards the axis of the bearing turntables 2 from the edge of the assembly table top 1, the upper end surface of the assembly table top 1 is provided with a first sliding rail 301 matched with a first fixture block body 3, the first fixture block body 3 is fed along the first sliding rail 301, the first fixture block body 3 is provided with a group of first clamping surfaces 302 facing the bearing turntables 2, the first clamping surfaces 302 are constructed to adapt to the peripheral outline of the workpieces to be processed, the limiting mold bases 4 are provided with at least two groups in the same group of limiting units, the assembly table top 1 is provided with a second sliding rail 401 for adjusting the limiting mold bases 4, the limiting mold bases 4 comprise second fixture block bodies 5, and the tops of the second fixture block bodies 5 are provided with a group of bending parts 501, and the fixture block main body II 5 is provided with a group of clamping surfaces II 502 facing the bearing turntable 2, the clamping surfaces II 502 are constructed to adapt to the peripheral contour of the workpiece to be machined, the clamping surfaces I302 are constructed to adapt to the peripheral contour of the workpiece to be machined and can be used for angle limiting or edge limiting, and the clamping surfaces II 502 are constructed to adapt to the peripheral contour of the workpiece to be machined, so that the clamping stability is ensured.

In order to realize the adjustment of a product in a non-clamping state to adapt to the milling requirements of different positions and different procedures, the invention discloses a bearing turntable 2 for the clamping mechanism as shown in figure 1, a group of bearing turntables 2 are rotatably arranged on the upper end surface of the assembly table surface 1, the bearing turntables 2 are embedded in the assembly table surface 1, the table top of the bearing rotary table 2 is slightly higher than the surface of the assembly table top 1, the bottom of the bearing rotary table 2 is provided with a roller structure which is matched with the assembly table top 1 in a rolling way, the bearing rotary table 2 is driven by a corner motor to realize angle adjustment, under the non-clamping state of the workpiece, the corner motor is driven, and the surface height of the bearing turntable 2 is slightly higher than that of the assembly table top 1, so the rotation of the bearing turntable 2 can drive the workpiece above the bearing turntable, when the angle is adjusted to a proper position, the clamping work can be carried out, and the milling processing can be carried out after the cutter is calibrated.

In order to limit the top surface of a clamped product, namely reduce the longitudinal jumping displacement of the product, the invention provides a limiting die holder 4 as shown in fig. 3, 4, 5 and 6, wherein the limiting die holder 4 comprises a fixture block main body II 5, one corner of the fixture block main body II 5 is provided with an oblique opening, an assembly slideway 503 for installing an oblique abutting part 6 is arranged in the oblique opening, the end part of the oblique abutting part 6 is connected with a bent part 501 through a buffer pile 7, and the oblique abutting part 6 abuts against the upper surface of a workpiece along the assembly slideway 503 by displacement under the adjustment of a driving mechanism;

two sets of guide rails 601 are symmetrically constructed on the upper end surface of the oblique abutting piece 6, an engaging groove 60101 is opened above the guide rails 601, an abutting portion 602 is constructed at the bottom end of the oblique abutting piece 6, a driving mechanism for adjusting the oblique abutting piece 6 is a set of driving shaft 8, a butt joint lug 504 rotatably connected with the driving shaft 8 is symmetrically constructed above the oblique port of the fixture block main body two 5, the driving shaft 8 has two sets of transmission gears 801 engaged with the engaging groove 60101 above the guide rails 601, the end portion of the driving shaft 8 is assembled with a driven gear 802, one set of transmission motor 9 is embedded at one side of the fixture block main body two 5, a motor shaft of the transmission motor 9 is assembled with a driving gear 901 engaged with the driven gear 802, when the transmission motor 9 drives the driving gear 901, the driving gear 901 rotates to drive the driven gear 802, so that the driving shaft 8 and the transmission gear 801 rotate synchronously, therefore, the meshing transmission of the meshing groove 60101 above the guide rail 601 is realized, the inclined abutting pieces 6 extend until the abutting parts 602 of the inclined abutting pieces 6 abut against the upper surface of the workpiece, the stability of product edge limiting in the cutting process is further ensured, and the possibility of longitudinal jumping of the product is reduced;

the 7 symmetries of above-mentioned buffering stake are provided with two sets ofly for realize the buffering and draw slant butt 6 back when driving motor 9 stops the drive, for realizing buffering reset function: the buffer shaft comprises a blocking end 10 fixedly connected with a bent part 501, a sleeve 11 screwed with the end part of the blocking end 10 and a buffer shaft 12 installed in the sleeve 11, wherein a cavity 1101 for accommodating the buffer shaft 12 is formed in the sleeve 11, the buffer shaft 12 is provided with a group of disk-shaped end parts, a group of springs 1201 are sleeved below the end parts, the end part of the sleeve 11 is provided with a home opening for limiting the end part of the springs 1201, the end part of the buffer shaft 12 extends out of the cavity 1101 and is provided with a threaded end, and the buffer shaft 12 is connected and assembled with the oblique abutting part 6 through the threaded end.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. An adjustable clamping mechanism for assisting machining of a numerical control milling machine comprises an assembly table top (1) which is arranged in a matched manner with the table top of the milling machine;

the method is characterized in that: the upper end face of the assembly table face (1) is rotatably provided with a group of bearing rotary tables (2), the periphery of each bearing rotary table (2) is annularly provided with a plurality of groups of limiting units for positioning workpieces to be processed, the adjusting directions of the plurality of groups of limiting units are towards the axis of each bearing rotary table (2) from the edge of the assembly table face (1), and each limiting unit comprises at least one group of fixture block main bodies (3) and a plurality of groups of limiting mold bases (4).

2. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 1, wherein: bear carousel (2) and inlay in locating assembly mesa (1), and the mesa height that just bears carousel (2) is a little higher than the surface of assembly mesa (1), the bottom that bears carousel (2) is equipped with the roller structure of roll cooperation assembly mesa (1), and (2) realize angular adjustment by corner motor drive.

3. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 1, wherein: the fixture block is characterized in that a first sliding rail (301) matched with a first fixture block body (3) is arranged on the upper end face of the assembly table top (1), the first fixture block body (3) feeds along the first sliding rail (301), the first fixture block body (3) is provided with a group of first clamping faces (302) facing the bearing turntable (2), and the first clamping faces (302) are configured to adapt to the peripheral outline of a workpiece to be machined.

4. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 1, wherein: the limiting die holder (4) is provided with at least two groups in the same limiting unit, a second sliding rail (401) for adjusting the limiting die holder (4) is arranged on the assembly table board (1), the limiting die holder (4) comprises a second fixture block body (5), a set of bent parts (501) are arranged at the top of the second fixture block body (5), the second fixture block body (5) is provided with a set of second clamping surfaces (502) facing the bearing turntable (2), and the second clamping surfaces (502) are constructed to adapt to the peripheral outline of the workpiece to be processed.

5. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 4, wherein: an oblique opening is formed in one corner of the second fixture block body (5), an assembly slide way (503) for installing the oblique abutting part (6) is formed in the oblique opening, the end part of the oblique abutting part (6) is connected with the bent part (501) through the buffer pile (7), and the oblique abutting part (6) is adjusted by the driving mechanism to move along the assembly slide way (503) to abut against the upper surface of the workpiece.

6. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 5, wherein: two groups of guide rails (601) are symmetrically formed on the upper end face of the oblique abutting piece (6), an engaging groove (60101) is formed above each guide rail (601), and an abutting portion (602) is formed at the bottom end of the oblique abutting piece (6).

7. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 6, wherein: the driving mechanism for adjusting the oblique abutting part (6) is a group of driving shafts (8), butt joint lugs (504) capable of being rotatably connected with the driving shafts (8) are symmetrically constructed above an oblique opening of the fixture block main body II (5), the driving shafts (8) are provided with two groups of transmission gears (801) which are meshed with meshing grooves (60101) above the guide rail (601), the end parts of the driving shafts (8) are provided with driven gears (802), one side of the fixture block main body II (5) is embedded with a group of transmission motors (9), and a motor shaft of each transmission motor (9) is provided with a driving gear (901) meshed with the driven gears (802).

8. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 5, wherein: buffer pile (7) symmetry is provided with two sets ofly, and it includes shutoff end (10), the sleeve (11) that shutoff end (10) tip of fixed connection kink (501) connect soon and buffer shaft (12) of installation in sleeve (11), it has chamber (1101) that hold buffer shaft (12) to open in sleeve (11).

9. The adjustable clamping mechanism for numerically controlled fraise machine machining assistance according to claim 8, wherein: the buffer shaft (12) is provided with a group of disk-shaped end parts, a group of springs (1201) are sleeved below the end parts, the end part of the sleeve (11) is provided with a house opening for limiting the end part of the springs (1201), the end part of the buffer shaft (12) extends out of the cavity (1101) and is provided with a threaded end, and the buffer shaft (12) is connected and assembled with the oblique abutting piece (6) through the threaded end.