CN223811841U - A tooling fixture for machining thin-walled parts - Google Patents

Abstract

The utility model relates to the technical field of clamps and discloses a fixture for machining thin-wall parts, which comprises a turnover workbench, wherein a working box is fixedly arranged between rotating shafts of the turnover workbench, a positioning assembly for positioning the thin-wall parts is arranged on the upper side of the working box, vertical holes are uniformly formed in the top of the working box, support columns for supporting the thin-wall parts are inserted and installed in the vertical holes, two locking plates are installed in the working box through guide assemblies, a first chute obliquely arranged is formed in the center of the upper locking plate, a second chute obliquely arranged is formed in the center of the lower locking plate, a driving assembly is installed on the lower side of the inner part of the working box, the upper ends of the driving assemblies are slidably installed in the first chute and the second chute, strip holes are uniformly formed in the locking plates, and the bottoms of the support columns penetrate through the strip holes aligned up and down. The utility model can avoid the indentation and deformation of the thin-wall part caused by the traditional pressing plate, effectively reduce the vibration amplitude during processing, has strong adaptability and is rapid to clamp.

Description

Frock clamp is used in thin wall spare processing

Technical Field

The utility model relates to the technical field of fixtures, in particular to a fixture for machining a thin-wall part.

Background

Thin-wall parts (such as aviation aluminum alloy frames and optical lens supports) have the following problems in the processing procedures of milling, drilling and the like due to thin wall (the thickness is less than or equal to 2 mm), complex shape (having a plurality of plane parts and curved surface parts), poor rigidity:

Clamping deformation, namely applying force to a traditional rigid clamp (such as a vice and a pressing plate) through a fixed point, wherein the local pressure can reach more than 50MPa, so that a workpiece can generate plastic deformation of more than 0.1mm to generate a dent;

The cutting precision is low, the planar part and the curved surface part of the thin-walled workpiece are difficult to obtain uniform support during cutting, and the cutting vibration of the cutter head can form a cutter-back phenomenon, so that the machining precision is affected.

The deformation can directly influence the consistency of the thin-wall part products, in addition, the clamping and disassembling processes of the thin-wall part are complex, the universality is poor, and the processing requirements of the thin-wall parts with different shapes are difficult to adapt.

Therefore, in order to solve the above problems, a tool clamp for machining a thin-walled workpiece is proposed.

Disclosure of utility model

The utility model aims to provide a fixture for machining a thin-wall part, which can avoid deformation of the thin-wall part and has high clamping efficiency, so that the problems in the background technology are solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a frock clamp is used in thin wall spare processing, includes the upset workstation, fixed mounting has the workstation between the pivot of upset workstation, the locating component that is used for fixing a position the thin wall spare is installed to the upside of workstation, vertical hole has evenly been seted up at the top of workstation, all peg graft and install the support column that is used for supporting the thin wall spare in the vertical hole, two locking plates are installed through guiding component to the inside of workstation the locking plate level and mutual parallel arrangement, the upside the first spout that the slant set up has been seted up to the center department of locking plate, the downside the second spout that the slant set up has been seted up to the center department of locking plate, first spout and second spout symmetry set up, drive assembly is installed to the inside downside of workstation, drive assembly's upper end slidable mounting is in first spout and second spout, rectangular hole has evenly been seted up to the locking plate, the rectangular hole that aligns from top to bottom of support column passes.

Specifically, the number of the positioning components is three and the positioning components are distributed in a triangular shape.

Specifically, locating component includes polished rod screw and sleeve, the screw has been seted up at the top of working box, polished rod screw and screw spiro union assembly, polished rod screw cover is equipped with the sleeve, has pressed from both sides the thin wall spare between polished rod screw's nut and the sleeve during the use.

Specifically, the support column includes bulb, first pole and second pole, first pole is pegged graft in the vertical hole, the top fixed mounting of first pole has the bulb, the bottom fixed mounting of first pole has the second pole, the rectangular hole of alignment about the second pole passes, the diameter of bulb, the diameter of second pole are all greater than the diameter of first pole.

Specifically, the guide assembly comprises a linear bearing and a guide rod, the linear bearing is fixedly installed at four corners of the side wall of the locking plate, which is far away from each other, the axis of the linear bearing and the axis of the rotating shaft in the overturning workbench are mutually parallel, the linear bearing is inserted into one end of the guide rod, and the other end of the guide rod is fixedly assembled with the working box.

Specifically, the drive assembly includes guide pulley, driving lever and cylinder, the inside downside fixed mounting of working box has the cylinder, the push rod end fixed mounting of cylinder has the driving lever, two guide pulleys are installed in the top rotation of driving lever, and the upside the guide pulley is located first spout, and the downside the guide pulley is located the second spout, and first spout and second spout are V font distribution when the driving lever is stirred forward.

Specifically, the upside the left end in rectangular hole, downside the right-hand member in rectangular hole is all fixed mounting has the arc, during the use about the alignment the same support column of arc centre gripping.

Compared with the prior art, the utility model has the beneficial effects that:

The positioning assembly is arranged according to the positions of the through holes of the thin-wall piece, so that indentation and deformation of the thin-wall piece caused by the traditional pressing plate at a plurality of positions can be avoided;

The driving assembly can oppositely move the two locking plates through the first chute and the second chute, so that the locking and the releasing of the support column are realized, the flexibly-adjusted support column can adapt to the shape of the thin-wall part, the uniform support is ensured, the vibration amplitude during processing is effectively reduced, and the cutting precision is improved;

Thin-wall parts with different shapes can be clamped in a matching mode, adaptability is high, and clamping is fast.

Drawings

FIG. 1 is a schematic partial cross-sectional view of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the interior of the work box of the present utility model;

FIG. 3 is a schematic top view of the structure of the upper locking plate of the present utility model;

fig. 4 is a schematic plan view of the structure of the lower locking plate of the present utility model.

In the figure, a turnover workbench, a support column 2, a ball head 21, a first pole 22, a second pole 23, a positioning component 3, a polish rod screw 31, a sleeve 32, a guide component 4, a linear bearing 41, a guide rod 42, a driving component 5, a guide wheel 51, a deflector rod 52, a cylinder 53, a locking plate 6, a working box 7, a first sliding groove 8, a long strip hole 9, a curved plate 10 and a second sliding groove 11 are arranged.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment comprises the following steps:

Referring to fig. 1, 2, 3 and 4, a fixture for machining a thin-walled workpiece is provided, which comprises a turnover workbench 1, a working box 7 is fixedly installed between rotating shafts of the turnover workbench 1, and the turnover workbench 1 is an existing component with two rotating shafts and is used for turning the working box 7.

The turnover workbench 1 is existing equipment and can adopt manual or electric type, the manual turnover workbench 1 mainly comprises a base, a bearing seat, a worm reducer, a hand wheel and other structures, the bearing seat and the worm reducer are both extended with rotating shafts for connecting the working box 7, the electric turnover workbench 1 mainly comprises the base, the bearing seat and a gear motor (a servo motor with an encoder and the worm reducer), and the bearing seat and the gear motor are both extended with rotating shafts for connecting the working box 7.

The locating component 3 for locating the thin-walled workpiece is installed on the upper side of the working box 7, the locating component 3 is arranged according to the positions and the quantity of the through holes of the thin-walled workpiece, the quantity of the locating component 3 can be three and distributed in a triangular shape, and stable support of the thin-walled workpiece is facilitated.

Vertical holes are uniformly formed in the top of the working box 7, the vertical holes are preferably distributed in a rectangular array, support columns 2 for supporting the thin-wall parts are inserted and installed in the vertical holes in a plugging mode, and the support columns 2 can move in the vertical holes along the axial direction so as to contact the thin-wall parts.

The inside of the work box 7 is provided with two locking plates 6 through the guide assembly 4, the locking plates 6 are rectangular plates, and the two locking plates 6 are horizontally and mutually parallel, so that each locking plate 6 can horizontally move along the guide assembly 4.

The center of the upper side locking plate 6 is provided with a first chute 8 which is obliquely arranged, the center of the lower side locking plate 6 is provided with a second chute 11 which is obliquely arranged, the first chute 8 and the second chute 11 are symmetrically arranged, the lower side of the inside of the working box 7 is provided with a driving component 5, the upper end of the driving component 5 is slidably arranged in the first chute 8 and the second chute 11, and the upper end of the driving component 5 can move back and forth in the first chute 8 and the second chute 11 at the same time, so that the two locking plates 6 can move synchronously and oppositely (approaching to each other or moving away from each other).

The locking plates 6 are uniformly provided with strip holes 9, the strip holes 9 are correspondingly arranged below the vertical holes, the bottoms of the support columns 2 penetrate through the strip holes 9 which are aligned vertically, and after the two locking plates 6 move oppositely, the strip holes 9 which are aligned vertically have two working states, namely the support columns 2 which penetrate through the inside are clamped, at the moment, the support columns 2 are not movable, or the clamping of the support columns 2 is released, at the moment, the support columns 2 can move.

Structure of the positioning assembly 3:

the positioning assembly 3 comprises a polished rod screw 31 and a sleeve 32, a screw hole is formed in the top of the working box 7, the polished rod screw 31 is assembled with the screw hole in a screwed mode, the sleeve 32 is sleeved on the polished rod screw 31, a thin-wall part is clamped between a nut of the polished rod screw 31 and the sleeve 32 in use, the length of the sleeve 32 is customized according to specific positions of through holes of the thin-wall part, the plane part of the thin-wall part can be kept horizontal after the thin-wall part is positioned, and the whole posture is beneficial to being processed.

The structure of the support column 2:

The support column 2 comprises a ball head 21, a first post rod 22 and a second post rod 23, wherein the first post rod 22 is inserted in a vertical hole, the ball head 21 is fixedly arranged at the top of the first post rod 22, the second post rod 23 is fixedly arranged at the bottom of the first post rod 22, the second post rod 23 penetrates through the vertically aligned strip hole 9, the diameter of the ball head 21 and the diameter of the second post rod 23 are both larger than the diameter of the first post rod 22, the limit effect is achieved, the first post rod 22 cannot fall off when moving in the vertical hole, and the ball head 21 is more beneficial to propping against the surface of a thin-wall piece.

The structure of the guide assembly 4:

The guide assembly 4 comprises a linear bearing 41 and a guide rod 42, the linear bearing 41 is fixedly arranged at four corners of the side wall, far away from each other, of the locking plate 6, the axis of the linear bearing 41 and the axis of the rotating shaft in the turnover workbench 1 are arranged in parallel, one end of the guide rod 42 is inserted and arranged in the linear bearing 41, the other end of the guide rod 42 is fixedly assembled with the working box 7, and the linear bearing 41 can provide a support foundation for horizontal translation for the locking plate 6 along the movement of the guide rod 42.

Structure of the drive assembly 5:

The driving assembly 5 comprises guide wheels 51, a deflector rod 52 and an air cylinder 53, the air cylinder 53 is fixedly arranged on the lower side of the inside of the working box 7, the deflector rod 52 is fixedly arranged at the push rod end of the air cylinder 53, two guide wheels 51 are rotatably arranged at the top of the deflector rod 52, the upper guide wheel 51 is located in the first sliding groove 8, and the lower guide wheel 51 is located in the second sliding groove 11.

The cylinder 53 can move the two guide wheels 51 forward and backward through the deflector rod 52, and the first chute 8 and the second chute 11 are obliquely and symmetrically arranged, so that the first chute 8 and the second chute 11 are distributed in a V shape (with reference to the top view direction) when the deflector rod 52 is moved forward, the upper locking plate 6 moves rightward and the lower locking plate 6 moves leftward at this time, and the first chute 8 and the second chute 11 are distributed in an inverted V shape (with reference to the top view direction) when the deflector rod 52 is moved backward, and the upper locking plate 6 moves leftward and the lower locking plate 6 moves rightward at this time.

In addition, in order to promote the effect of clamping the support column 2:

The left end of the upper side rectangular hole 9, the right-hand member of the rectangular hole 9 of downside are all fixed mounting have arc 10, arc 10's shape and the looks adaptation of second post 23, and arc 10's height is 2cm ~3cm, and the same support column 2 of arc 10 centre gripping of alignment about during the use, and the frictional force of offset face can be promoted to the area of contact of increase, also can offer anti-skidding reticulate pattern at the circumference side of second post 23, arc 10's intrados, further promotes the frictional force of offset face.

Now, the working principle of this embodiment will be described by taking an electric turnover table 1 as an example:

The turnover workbench 1 and the air cylinder 53 are electrically connected with a controller of the station, and the turnover and locking actions are controlled by a turnover button and a locking button on the controller.

The positioning and mounting stage comprises the steps that the working box 7 is kept horizontal by the turnover working table 1, the positioning assembly 3 faces upwards, a thin-wall part is conveniently mounted and positioned through the matching of the polish rod screw 31 and the sleeve 32, deformation caused by the traditional clamp is avoided, at the moment, the driving assembly 5 drives the upper side locking plate 6 to move leftwards, the lower side locking plate 6 to move rightwards, each pair of arc plates 10 are opened away from each other, the support column 2 is in a state of not clamping the support column 2, and the support column 2 falls freely until the ball head 21 abuts against the upper surface of the working box 7.

The uniform supporting stage comprises the steps of pressing a turnover button on a primary controller, turning a working box 7 by the turnover workbench 1, at the moment, driving a thin-wall piece downwards by the positioning component 3, enabling the support column 2 to still fall freely in the process, enabling the ball head 21 to gradually abut against the thin-wall piece and conform to the shape of the thin-wall piece, and then pressing a locking button, enabling the driving component 5 to drive the upper side locking plate 6 to move rightwards and the lower side locking plate 6 to move leftwards, enabling each pair of arc-shaped plates 10 to abut against the support column 2 closely, enabling the position of the support column 2 to be fixed and enabling the support column 2 not to move axially.

In the processing stage, the turnover button is pressed again, the thin-wall part is turned upwards, the support columns 2 uniformly support the lower surface of the thin-wall part, the cutter head can play a role in uniform support during cutting, and vibration on the thin-wall part is reduced.

When the same thin-wall part is repeatedly processed, the working box 7 does not need to be overturned again, and only the positioning assembly 3 needs to be disassembled and installed, and when different thin-wall parts are processed, the whole process is repeated to carry out uniform support adjustment, so that the universality of clamping and support is high.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (7)

1. A fixture for machining thin-wall parts comprises a turnover workbench (1) and is characterized in that a working box (7) is fixedly installed between rotating shafts of the turnover workbench (1), a locating component (3) for locating the thin-wall parts is installed on the upper side of the working box (7), vertical holes are evenly formed in the tops of the working box (7), support columns (2) for supporting the thin-wall parts are installed in the vertical holes in an inserted mode, two locking plates (6) are installed in the working box (7) through guide components (4), the two locking plates (6) are horizontally and mutually parallel, a first chute (8) which is obliquely arranged is formed in the center of each locking plate (6) is formed in the upper side, a second chute (11) which is obliquely arranged is formed in the center of each locking plate (6), driving components (5) are installed on the lower side of the working box (7) in a matched mode, the upper ends of the driving components (5) are installed in a sliding mode, and the upper ends of the driving components (5) are installed in the first chute (8) and the second chute (11) in a matched mode, and the upper end of the driving components (7) penetrate through the first chute (9) and the lower chute (9) of the long strip-shaped supporting columns (9) are arranged in the first chute (9) in a matched mode.

2. The fixture for machining thin-walled parts according to claim 1, wherein the number of the positioning assemblies (3) is three and the positioning assemblies are distributed in a triangular shape.

3. The fixture for machining the thin-walled workpiece according to claim 1, wherein the positioning assembly (3) comprises a polished rod screw (31) and a sleeve (32), a screw hole is formed in the top of the working box (7), the polished rod screw (31) is assembled with the screw hole in a screwed mode, the sleeve (32) is sleeved on the polished rod screw (31), and the thin-walled workpiece is clamped between a nut of the polished rod screw (31) and the sleeve (32) in use.

4. The fixture for machining the thin-walled workpiece according to claim 1, wherein the supporting column (2) comprises a ball head (21), a first post rod (22) and a second post rod (23), the first post rod (22) is inserted into the vertical hole, the ball head (21) is fixedly arranged at the top of the first post rod (22), the second post rod (23) is fixedly arranged at the bottom of the first post rod (22), the second post rod (23) penetrates through the vertically aligned strip holes (9), and the diameters of the ball head (21) and the second post rod (23) are both larger than those of the first post rod (22).

5. The fixture for machining thin-wall parts according to claim 1, wherein the guide assembly (4) comprises linear bearings (41) and guide rods (42), the linear bearings (41) are fixedly installed at four corners of the side wall, away from each other, of the locking plate (6), the axes of the linear bearings (41) and the axes of rotating shafts in the overturning workbench (1) are arranged in parallel, one ends of the guide rods (42) are inserted and installed in the linear bearings (41), and the other ends of the guide rods (42) are fixedly assembled with the working box (7).

6. The fixture for machining the thin-walled workpiece according to claim 1, wherein the driving assembly (5) comprises guide wheels (51), a deflector rod (52) and an air cylinder (53), the air cylinder (53) is fixedly arranged on the lower side of the inside of the working box (7), the deflector rod (52) is fixedly arranged at the push rod end of the air cylinder (53), two guide wheels (51) are rotatably arranged at the top of the deflector rod (52), the upper guide wheels (51) are located in the first sliding groove (8), the lower guide wheels (51) are located in the second sliding groove (11), and the first sliding groove (8) and the second sliding groove (11) are distributed in a V shape when the deflector rod (52) is pulled forwards.

7. The fixture for machining thin-walled parts according to claim 1, wherein arc plates (10) are fixedly installed at the left end of the upper long-strip hole (9) and the right end of the lower long-strip hole (9), and the arc plates (10) aligned left and right clamp the same support column (2) in use.