CN216939559U

CN216939559U - Flexible fixture for numerically controlled milling machine

Info

Publication number: CN216939559U
Application number: CN202220595329.7U
Authority: CN
Inventors: 顾柄旌; 卢有双; 汤辉
Original assignee: Lanzhou Ls Heavy Machinery Co ltd
Current assignee: Lanzhou Ls Heavy Machinery Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-12
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a flexible clamp for a numerical control milling machine, which comprises a base, wherein the middle part of the upper surface of the base is provided with a transverse sliding groove and a longitudinal sliding groove which are mutually vertical, and a central stop block is arranged at the intersection of the transverse sliding groove and the longitudinal sliding groove; two transverse clamping plates and a transverse pressure spring are symmetrically arranged in the transverse sliding groove, a pressure plate is arranged at the top of each transverse clamping plate, and a support tension spring is arranged between each pressure plate and the bottom wall of the inner cavity of each transverse clamping plate; two extrusion columns and a longitudinal pressure spring are symmetrically arranged in the longitudinal sliding groove, and a longitudinal clamping plate is arranged at the tops of the extrusion columns. The utility model can make the transverse clamping plate, the longitudinal clamping plate and the pressing plate flexibly and firmly clamp the workpiece to be processed through the actions of the transverse pressure spring, the longitudinal pressure spring and the support tension spring. The utility model has simple structure and convenient operation, and is convenient for clamping workpieces.

Description

Flexible fixture for numerically controlled milling machine

Technical Field

The utility model relates to the technical field of numerical control machine tool machining, in particular to a flexible clamp for a numerical control milling machine.

Background

The numerical control milling machine is an automatic processing device developed on the basis of a common milling machine, and is divided into two categories, namely a non-tool magazine and a tool magazine, wherein the numerical control milling machine with the tool magazine is also called as a processing center, the numerical control milling machine is a numerical control machine with a very strong processing function, and the 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 two milling modes cannot be separated.

Numerical control milling machine anchor clamps use rigidity centre gripping frock more, for example machine vice, rotate the lead screw through special spanner, drive movable vice body through screw nut and remove, form the clamping and loosen to the work piece, belong to rigidity centre gripping. However, when the clamp is used, if a workpiece to be clamped is a thin-wall workpiece, an aluminum plate or an aluminum profile part, the workpiece is extruded by the lead screw to be fixed when the workpiece is clamped, so that the workpiece is easily deformed when the clamping force is not well mastered, and the final quality of a product is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a method for solving the problems in the prior art.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a flexible clamp for a numerical control milling machine comprises a rectangular base, wherein the middle part of the upper surface of the base is symmetrically provided with two transverse sliding grooves and a longitudinal sliding groove which are perpendicular to each other along the axis of the base, the intersection of the transverse sliding grooves and the longitudinal sliding grooves is provided with a central stop block through a bolt, and the end parts of the transverse sliding grooves and the longitudinal sliding grooves are respectively provided with a side baffle fixed on the side wall of the base (1); extrusion columns are arranged in the longitudinal sliding grooves on two sides of the central stop block, a longitudinal clamping plate is arranged at the tops of the extrusion columns, the outer side wall of each extrusion column is connected with one end of a longitudinal pressure spring, the other end of each longitudinal pressure spring is connected with the top end of a pre-tightening bolt extending out of the side baffle, and the pre-tightening bolt is in threaded connection with the corresponding side baffle; all install horizontal grip block in the horizontal sliding tray of center dog both sides, the clamp plate is installed at the top of horizontal grip block, the lateral wall of horizontal grip block and the one end fixed connection of push rod, the other end of push rod extends the side shield, the limiting plate is installed to the tip of push rod, spacing post is installed to the symmetry on the lateral wall of limiting plate, cup jointed horizontal pressure spring on the outer wall of push rod, the tip of horizontal pressure spring is fixed respectively on horizontal grip block and limiting plate.

Preferably, the upper surface of the base above the transverse sliding groove is provided with a plurality of limiting grooves, and clamping plates are arranged in the limiting grooves.

Preferably, the bottom surface of the pressing plate is connected with the top of the supporting plate, the supporting plate is embedded in a hollow inner cavity of the transverse clamping plate, and a supporting tension spring is arranged between the bottom of the supporting plate and the bottom wall of the inner cavity of the transverse clamping plate.

Preferably, the middle part of the side wall of the transverse clamping plate is provided with a plurality of adjusting holes with different heights, the center of the supporting plate is provided with a long circular positioning hole matched with the adjusting holes, and the adjusting holes and the positioning holes are internally provided with positioning bolts.

Preferably, guide rail mounting holes are formed in the top ends of the left side wall and the right side wall of the base and the corresponding side baffle plates, two guide rails which are parallel to each other are symmetrically mounted outside the transverse side wall of the base respectively, the front parts of the guide rails are connecting cylinders, the rear parts of the guide rails are long strip plates, the connecting cylinders are assembled in the guide rail mounting holes, and the outer ends of the push rods are located between the long strip plates which are parallel to each other; the middle part of the strip plate is provided with a plurality of limiting holes matched with the limiting columns in shape and specification along the length direction, and the limiting clamping columns are inserted in the limiting holes.

Preferably, the connecting cylinder and the guide rail mounting hole are in shaft hole clearance fit.

Preferably, two sets of mutually parallel sliding guide grooves are formed in the side walls of the transverse sliding groove and the longitudinal sliding groove, a plurality of convex blocks are arranged on the side walls, adjacent to the side walls of the transverse clamping plate and the transverse sliding groove, of the side walls of the extrusion column and the side walls of the longitudinal sliding groove, and the convex blocks are clamped in the sliding guide grooves.

Preferably, the adjusting hole is a counter-sunk hole.

When the clamping device is used, an operator pulls the push rod, the push rod drives the transverse clamping plate and the pressing plate to move to proper positions, the operator places the clamping plate in the limiting groove in front of the inner side of the transverse clamping plate, and inserts the limiting clamping column into the limiting hole in front of the limiting plate at the end part of the push rod to limit the transverse clamping plate and the push rod; the operator pushes the longitudinal clamping plate away towards the two sides, and the workpiece to be clamped is placed at the center of the base; an operator takes out the clamping plate and the limiting clamping column, the transverse clamping plate moves towards a workpiece to be clamped under the action of the transverse pressure spring, the workpiece is clamped from the left side and the right side, the limiting clamping column is inserted into a limiting hole behind the limiting plate at the end part of the push rod, and the transverse clamping plate and the push rod are limited; an operator pulls up the pressing plate, loosens the pressing plate after the height of the workpiece is exceeded, the bottom surface of the pressing plate is tightly attached to the upper surface of the workpiece under the action of the supporting tension spring, and the operator installs the positioning bolts into the adjusting holes and the positioning holes to limit the pressing plate; an operator loosens the longitudinal clamping plate, the longitudinal clamping plate clamps the workpiece from the left side and the right side under the action of the longitudinal pressure spring, and then the pre-tightening bolt is adjusted until the extrusion column and the workpiece are stressed, so that the longitudinal clamping plate flexibly controls the clamping range on the base. And the workpiece to be processed is flexibly clamped and can be arranged on a numerical control milling machine for processing.

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

(1) according to the utility model, the middle part of the base is provided with the transverse sliding groove and the longitudinal sliding groove, the transverse clamping plate and the longitudinal clamping plate are respectively arranged in the sliding grooves, and the pressing plate is arranged above the transverse clamping plate and can clamp a workpiece to be processed from the transverse direction, the longitudinal direction and the height direction; the positions of the clamping plates are adjustable, and the clamping plates are suitable for clamping workpieces of different specifications;

(2) according to the utility model, the transverse pressure spring is arranged between the transverse clamping plate and the transverse sliding groove, the longitudinal pressure spring is arranged between the extrusion column and the longitudinal sliding groove, and the supporting spring is arranged between the pressing plate and the bottom wall of the inner cavity of the transverse clamping plate, so that the transverse clamping plate, the longitudinal clamping plate and the pressing plate can flexibly and firmly clamp a workpiece to be processed under the action of the springs;

(3) according to the utility model, the end part of the push rod is provided with the limiting column, the guide rail is provided with the limiting hole, and the limiting clamping column is inserted in the limiting hole, so that the end part of the push rod can be limited, and the transverse clamping plate is prevented from shifting in the processing operation process; the positioning holes are formed in the supporting plate, the adjusting holes are formed in the transverse clamping plate, and the pressing plate is limited through the positioning bolts, so that the pressing plate is prevented from shifting in the machining operation process; limiting the extrusion column by using a positioning hole to avoid the displacement of the longitudinal clamping plate in the processing operation process;

(4) according to the utility model, the front part of the guide rail is provided with the connecting cylinder, the rear part of the guide rail is provided with the strip plate, the connecting cylinder is assembled in the guide rail mounting hole of the base and is in clearance fit, so that the stability of guide rail connection is ensured, and the positioning of the push rod is ensured;

(5) the utility model has simple structure and convenient operation, and is convenient for clamping workpieces.

Drawings

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

FIG. 2 is a schematic view of a portion of the guide rail of FIG. 1;

FIG. 3 is a schematic view of the assembled structure of the lateral clamp plate and the pressure plate of FIG. 1;

FIG. 4 is a schematic view of the guide rail of FIG. 1;

FIG. 5 is a schematic view of the base of FIG. 1;

FIG. 6 is a schematic view of the longitudinal clamping plates and crush columns of FIG. 1;

FIG. 7 is a schematic view of the structure of the lateral sliding groove and the longitudinal sliding groove in the base of FIG. 1;

in the figure: 1. the base, 2, the horizontal sliding groove, 3, horizontal grip block, 4, the horizontal pressure spring, 5, the backup pad, 6, the clamp plate, 7, the limiting plate, 8, the push rod, 9, the guide rail, 10, spacing hole, 11, supporting spring, 12, spacing joint post, 13, spacing post, 14, the regulation hole, 15, the locating hole, 16, the spacing groove, 17, the cardboard, 18, the longitudinal sliding groove, 19, the longitudinal grip block, 20, the extrusion post, 21, the longitudinal pressure spring, 22, pretension bolt, 23, the connection cylinder, 24, rectangular board, 25, the guide rail mounting hole, 26, the slip guide slot, 27, the lug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

1, as shown in fig. 1 to 3, a flexible clamp for a numerically controlled milling machine comprises a rectangular base 1, wherein the middle part of the upper surface of the base 1 is symmetrically provided with two transverse sliding grooves 2 and a longitudinal sliding groove 18 which are perpendicular to each other along the axis of the base, the intersection of the transverse sliding groove 2 and the longitudinal sliding groove 18 is provided with a central stop block through a bolt, and the end parts of the transverse sliding groove 2 and the longitudinal sliding groove 18 are respectively provided with a side baffle fixed on the side wall of the base 1; extrusion columns 20 are respectively arranged in the longitudinal sliding grooves 18 on two sides of the central stop block, a longitudinal clamping plate 19 is arranged at the top of each extrusion column 20, the outer side wall of each extrusion column 20 is connected with one end of a longitudinal pressure spring 21, the other end of each longitudinal pressure spring 21 is connected with the top end of a pre-tightening bolt 22 extending out of the side baffle, and the pre-tightening bolts 22 are in threaded connection with the corresponding side baffle; all install horizontal grip block 3 in the horizontal sliding tray 2 of central dog both sides, clamp plate 6 is installed at the top of horizontal grip block 3, the lateral wall of horizontal grip block 3 and the one end fixed connection of push rod 8, the other end of push rod 8 extends the side shield, limiting plate 7 is installed to the tip of push rod 8, spacing post 13 is installed to the symmetry on the lateral wall of limiting plate 7, horizontal pressure spring 4 has been cup jointed on the outer wall of push rod 8, the tip of horizontal pressure spring 4 is fixed respectively on horizontal grip block 3 and limiting plate 7.

A plurality of limiting grooves 16 are formed in the upper surface of the base 1 above the transverse sliding groove 2, and clamping plates 17 are installed in the limiting grooves 16.

The bottom surface of the pressing plate 6 is connected with the top of the supporting plate 5, the supporting plate 5 is embedded in the hollow inner cavity of the transverse clamping plate 3, and a supporting tension spring 11 is arranged between the bottom of the supporting plate 5 and the bottom wall of the inner cavity of the transverse clamping plate 3.

A plurality of adjusting holes 14 with different heights are formed in the middle of the side wall of the transverse clamping plate 3, a long circular positioning hole 15 matched with the adjusting holes 14 is formed in the center of the supporting plate 5, and positioning bolts are installed in the adjusting holes 14 and the positioning holes 15. The adjustment hole 14 is a counter-sunk hole.

Guide rail mounting holes 25 are formed in the top ends of the left side wall and the right side wall of the base 1 and the corresponding side baffle plates, two guide rails 9 which are parallel to each other are symmetrically mounted outside the transverse side wall of the base 1 respectively, a connecting cylinder 23 is arranged at the front part of each guide rail 9, a long strip plate 24 is arranged at the rear part of each guide rail 9, the connecting cylinders 23 are assembled in the guide rail mounting holes 25, and the outer ends of push rods 8 are positioned between the long strip plates 24 which are parallel to each other; the middle part of the strip plate 24 is provided with a plurality of limiting holes 10 with the shape and specification matched with the limiting columns 13 along the length direction, and the limiting clamping columns 12 are inserted in the limiting holes 10. The connecting cylinder 23 is in shaft hole clearance fit with the guide rail mounting hole 25.

The side walls of the transverse sliding groove 2 and the longitudinal sliding groove 18 are respectively provided with a plurality of groups of sliding guide grooves 26 which are parallel to each other, the side walls of the transverse clamping plate 3 adjacent to the side walls of the transverse sliding groove 2 and the side walls of the extrusion column 20 adjacent to the side walls of the longitudinal sliding groove 18 are respectively provided with a plurality of convex blocks 27, and the convex blocks 27 are installed and clamped in the sliding guide grooves 26.

When the clamping device is used, an operator pulls the push rod 8, the push rod 8 drives the transverse clamping plate 3 and the pressing plate 6 to move to proper positions, the operator places the clamping plate 17 in the limiting groove 16 in front of the inner side of the transverse clamping plate 3, and inserts the limiting clamping column 12 into the limiting hole 10 in front of the limiting plate 7 at the end part of the push rod 8 to limit the transverse clamping plate 3 and the push rod 8; the operator pushes the longitudinal clamping plate 3 to the two sides to place the workpiece to be clamped at the center of the base 1; an operator takes out the clamping plate 17 and the limiting clamping column 12, the transverse clamping plate 3 moves towards a workpiece to be clamped under the action of the transverse pressure spring 4, the workpiece is clamped from the left side and the right side, the limiting clamping column 12 is inserted into the limiting hole 10 behind the limiting plate 7 at the end part of the push rod 8, and the transverse clamping plate 3 and the push rod 8 are limited; an operator upwards pulls the pressing plate 6, loosens the pressing plate after the height of the workpiece is exceeded, the bottom surface of the pressing plate 6 is tightly attached to the upper surface of the workpiece under the action of the supporting spring 11, and the operator installs the positioning bolts into the adjusting holes 14 and the positioning holes 13 to limit the pressing plate 6; an operator loosens the longitudinal clamping plate 19, the longitudinal clamping plate 19 clamps the workpiece from the front side and the rear side under the action of the longitudinal compression spring 21, the pre-tightening bolt 22 is assembled in the middle of the extrusion column 20, and the pre-tightening bolt 22 is adjusted to the condition that the extrusion column 20 and the workpiece are stressed, so that the longitudinal clamping plate 19 flexibly controls the clamping range on the base 1. And the workpiece to be processed is flexibly clamped and can be arranged on a numerical control milling machine for processing.

According to the utility model, the middle part of the base is provided with the transverse sliding groove and the longitudinal sliding groove, the transverse clamping plate and the longitudinal clamping plate are respectively arranged in the sliding grooves, and the pressing plate is arranged above the transverse clamping plate and can clamp a workpiece to be processed from the transverse direction, the longitudinal direction and the height direction; the position of the clamping plate is adjustable, and the clamping plate is suitable for clamping workpieces of different specifications.

The above are merely preferred examples of the present invention. It should be noted that other equivalent variations and modifications within the teachings of the present invention may occur to those skilled in the art, and should be considered within the scope of the present invention.

Claims

1. The utility model provides a numerical control is flexible anchor clamps for milling machine, includes base (1) of cuboid form, its characterized in that: the middle part of the upper surface of the base (1) is symmetrically provided with two transverse sliding grooves (2) and a longitudinal sliding groove (18) which are perpendicular to each other along the axis of the upper surface, the intersection of the transverse sliding grooves (2) and the longitudinal sliding grooves (18) is provided with a central stop block through a bolt, and the end parts of the transverse sliding grooves (2) and the longitudinal sliding grooves (18) are respectively provided with a side stop plate fixed on the side wall of the base (1); extrusion columns (20) are respectively arranged in longitudinal sliding grooves (18) on two sides of the central stop block, a longitudinal clamping plate (19) is arranged at the tops of the extrusion columns (20), the outer side wall of each extrusion column (20) is connected with one end of a longitudinal pressure spring (21), the other end of each longitudinal pressure spring (21) is connected with the top end of a pre-tightening bolt (22) extending out of the side baffle, and each pre-tightening bolt (22) is in threaded connection with the corresponding side baffle; all install horizontal grip block (3) in the horizontal sliding tray (2) of central dog both sides, clamp plate (6) are installed at the top of horizontal grip block (3), the lateral wall of horizontal grip block (3) and the one end fixed connection of push rod (8), the other end of push rod (8) extends the side shield, limiting plate (7) are installed to the tip of push rod (8), spacing post (13) are installed to the symmetry on the lateral wall of limiting plate (7), horizontal pressure spring (4) have been cup jointed on the outer wall of push rod (8), the tip of horizontal pressure spring (4) is fixed respectively on horizontal grip block (3) and limiting plate (7).

2. The numerical control milling machine flexible clamp according to claim 1, characterized in that: a plurality of limiting grooves (16) are formed in the upper surface of the base (1) above the transverse sliding groove (2), and clamping plates (17) are installed in the limiting grooves (16).

3. A numerically controlled fraise machine flexible clamp according to claim 1 or 2, characterized in that: the bottom surface of the pressing plate (6) is connected with the top of the supporting plate (5), the supporting plate (5) is embedded in a hollow inner cavity of the transverse clamping plate (3), and a supporting tension spring (11) is installed between the bottom of the supporting plate (5) and the bottom wall of the inner cavity of the transverse clamping plate (3).

4. The numerical control milling machine flexible clamp according to claim 3, characterized in that: a plurality of adjusting holes (14) with different heights are formed in the middle of the side wall of the transverse clamping plate (3), long circular positioning holes (15) matched with the adjusting holes (14) are formed in the center of the supporting plate (5), and positioning bolts are installed in the adjusting holes (14) and the positioning holes (15).

5. The numerically controlled fraise machine flexible clamp according to claim 4, characterized in that: guide rail mounting holes (25) are formed in the top ends of the left side wall and the right side wall of the base (1) and the corresponding side baffle plates, two guide rails (9) which are parallel to each other are symmetrically mounted outside the transverse side wall of the base (1), the front parts of the guide rails (9) are provided with connecting cylinders (23), the rear parts of the guide rails are provided with long strip plates (24), the connecting cylinders (23) are assembled in the guide rail mounting holes (25), and the outer ends of push rods (8) are located between the long strip plates (24) which are parallel to each other; the middle part of the strip plate (24) is provided with a plurality of limiting holes (10) with the shape and specification matched with the limiting columns (13) along the length direction, and the limiting clamping columns (12) are inserted in the limiting holes (10).

6. The numerically controlled fraise machine flexible clamp according to claim 5, characterized in that: the connecting cylinder (23) is in shaft hole clearance fit with the guide rail mounting hole (25).

7. The numerically controlled fraise machine flexible clamp according to claim 6, characterized in that: the side walls of the transverse sliding groove (2) and the longitudinal sliding groove (18) are respectively provided with a plurality of groups of sliding guide grooves (26) which are parallel to each other, the side walls of the transverse clamping plate (3) adjacent to the side walls of the transverse sliding groove (2) and the side walls of the extrusion column (20) adjacent to the side walls of the longitudinal sliding groove (18) are respectively provided with a plurality of convex blocks (27), and the convex blocks (27) are installed and clamped in the sliding guide grooves (26).

8. The numerically controlled fraise machine flexible clamp according to claim 7, characterized in that: the adjusting hole (14) is a counter bore.