CN215616472U - Automatic clamp for large thin-wall workpiece - Google Patents

Abstract

The utility model relates to the field of clamps, in particular to an automatic clamp for a large thin-wall workpiece, which comprises a base, a positioning mechanism and a clamping mechanism, wherein the clamping mechanism comprises a supporting piece, a lower pull rod and a gland; positioning mechanism includes the location awl, draw the cover, stripper and a plurality of positioning unit, every positioning unit includes the traveller, guide bar and elastic component, location awl and base fixed connection, stripper and lower link sliding connection and stripper pass through the elastic component and are connected with the base, the guide bar runs through the both ends of base and guide bar and is connected with stripper and draw the cover separately, the lateral wall of drawing the cover is equipped with a plurality of through-holes along its footpath, the traveller slides and sets up in the through-hole, the one end of traveller be with location awl complex inclined plane. When the technical scheme is adopted, the workpiece can be prevented from being deformed and stably clamped during positioning.

Description

Automatic clamp for large thin-wall workpiece

Technical Field

The utility model relates to the field of clamps, in particular to an automatic clamp for a large thin-wall workpiece.

Background

In the process of machining the annular workpiece, the inner hole of the annular workpiece is usually expanded by the elastic expansion sleeve so as to position and fix the annular workpiece, but the side wall of the annular workpiece is thinner, so that the annular workpiece is deformed when the annular workpiece is expanded by the elastic expansion sleeve.

For solving above-mentioned problem, prior art discloses an anchor clamps, including the lantern ring, sleeve pipe and a plurality of kellies, the kellies is decided and is set up on the sleeve pipe lateral wall along sleeve pipe radial sliding, and the kellies is decided and is blocked pole and lantern ring scarf cooperation, and the locating lever moves under the effect of the lantern ring and annular workpiece contact along with the process that the sleeve pipe removed, and prior art's anchor clamps are though can fix a position and reduce annular workpiece's deformation to annular workpiece, but anchor clamps are not good enough to annular workpiece's the tight effect of clamp, can influence annular workpiece's machining precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a clamp which can avoid the deformation of an annular workpiece and stably clamp the annular workpiece during positioning.

In order to achieve the purpose, the technical scheme of the utility model provides an automatic clamp for a large thin-wall workpiece, which comprises a base, a positioning mechanism and a clamping mechanism, wherein the clamping mechanism comprises a supporting piece, a lower pull rod and a gland; positioning mechanism includes the location awl, draw the cover, stripper and a plurality of positioning unit, every positioning unit includes the traveller, guide bar and elastic component, location awl and base fixed connection, stripper and lower link sliding connection and stripper pass through the elastic component and are connected with the base, the guide bar runs through the both ends of base and guide bar and is connected with stripper and draw the cover separately, the lateral wall of drawing the cover is equipped with a plurality of through-holes along its footpath, the traveller slides and sets up in the through-hole, the one end of traveller be with location awl complex inclined plane.

The technical effect of the scheme is as follows: when an annular workpiece is machined, the lower pull rod is moved so as to drive the boss to move, the boss is contacted with the stripper plate and then drives the stripper plate, the guide rod, the pull sleeve and the sliding column to move, and the elastic part is compressed in the process; placing the annular tool on the support piece, and connecting the gland with the lower pull rod; the lower pull rod is moved reversely, so that the gland is driven to move to contact with the end face of the annular workpiece until the gland compresses the annular workpiece, and the annular workpiece is clamped stably.

The boss moves along with the lower pull rod in the process of reversely moving the lower pull rod, the elastic piece extends and pushes the stripper plate to reversely move, so that the guide rod, the pull sleeve and the sliding column are driven to reversely move, one end of the sliding column is in contact with the positioning cone, the sliding column moves towards the annular workpiece along the through hole in the process of reversely moving the sliding column, the annular workpiece is positioned through the sliding column, and the annular workpiece cannot be deformed due to the fact that the sliding column drives the annular workpiece to be positioned through the elastic piece.

Further, fixture still includes central siphon, connecting piece and upper tie rod, central siphon and base fixed connection, and the one end of lower tie rod is located the central siphon and is connected with the one end of upper tie rod through the connecting piece, and the other end and the gland fixed connection of upper tie rod. The technical effect of the scheme is as follows: through the other end of the upper pull rod and the gland fixed connection, after the annular workpiece is placed on the supporting piece, the upper pull rod is directly connected with the lower pull rod through the connecting piece, or the upper pull rod is directly separated from the connecting piece and the lower pull rod through pulling the gland, and the gland is not required to be fixed on the lower pull rod through a bolt when the annular workpiece is clamped or taken out at each time.

Furthermore, the connecting piece is four lamella claws, is equipped with the step hole in the central siphon, and four lamella claws can be closed and open in the central siphon. The technical effect of the scheme is as follows: when the lower pull rod moves and pushes the four-petal claws to move to the larger hole of the stepped hole, the four-petal claws are opened, and the upper pull rod is separated from the four-petal claws; when the four-clack claw moves to the smaller hole of the stepped hole, the four-clack claw is closed, the upper pull rod is connected with the four-clack claw, and the operation is convenient.

Furthermore, the supporting piece comprises an inner core and a supporting column, the inner core is fixedly connected with the base, and the supporting column is fixedly connected with the inner core. The technical effect of the scheme is as follows: the supporting piece is in a special shape and is divided into an inner core and a supporting column, so that the processing is convenient.

Furthermore, a groove is formed in the pull sleeve, a limiting pin is arranged on the sliding column along the radial direction of the sliding column, and the tail end of the limiting pin is located in the groove. The technical effect of the scheme is as follows: the sliding column is prevented from rotating in the through hole.

Furthermore, a dust cover is fixed on the positioning cone. The technical effect of the scheme is as follows: avoid producing in the course of working such as grinding, car tooth sweeps inside the mould.

Further, the lower pull rod is provided with a strip-shaped groove along the axial direction, the shaft tube is also provided with a limit pin along the radial direction, and the tail end of the limit pin is positioned in the strip-shaped groove. The technical effect of the scheme is as follows: the movement of the shaft tube is convenient to guide.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention in a clamped state.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a base 1, an axle tube 2, a lower pull rod 3, an upper pull rod 4, a gland 5, an inner core 6, a support column 7, an annular workpiece 8, a boss 9, a four-petal claw 10, a positioning cone 11, a pull sleeve 12, a discharging plate 13, a sliding column 14, a guide rod 15, a compression spring 16, a groove 17, a limit pin 18, a strip-shaped groove 19 and a dust cover 20.

The first embodiment is as follows:

an embodiment substantially as shown in figure 1: as shown in fig. 1, the automatic fixture for large thin-wall workpieces comprises a base 1, a positioning mechanism and a clamping mechanism, wherein the clamping mechanism comprises an axle tube 2, a supporting piece, a lower pull rod 3, a connecting piece, an upper pull rod 4 and a gland 5, the base 1 is fixedly mounted on a supporting table (not shown in the figure) through bolts, the supporting piece comprises an inner core 6 and a supporting column 7, the axle tube 2 and the inner core 6 are both fixedly connected with the base 1 through bolts, the supporting column 7 and the inner core 6 are fixedly connected through bolts, and the supporting column 7 is used for supporting an annular workpiece 8.

The lower end of the lower pull rod 3 penetrates through a hole formed in the support table and is locked through a nut, or the lower end of the lower pull rod 3 is directly in threaded connection with the clamping oil cylinder, and a boss 9 is welded or integrally formed on the lower pull rod 3; a stepped hole is formed in the shaft tube 2, the diameter of the stepped hole at the lower end is smaller, and the diameter of the stepped hole at the upper end is larger; the upper end of lower link 3 is located central siphon 2, the connecting piece also is located central siphon 2, the connecting piece is four lamella claws 10 or draws the post, select to use current product four lamella claws 10 in this embodiment, four lamella claws 10 can be closed and open in central siphon 2, the upper end of lower link 3 is connected with the lower extreme of last pull rod 4 through four lamella claws 10, the upper end and the gland 5 of going up pull rod 4 pass through bolt fixed connection, the upper end of going up pull rod 4 can contact with top, the upper surface threaded connection of gland 5 has the screw of lifting by crane.

The positioning mechanism comprises three positioning cones 11, a pull sleeve 12, a discharging plate 13 and a plurality of positioning units, each positioning unit comprises a sliding column 14, a guide rod 15 and an elastic piece, and the elastic piece is a compression spring 16; location awl 11 passes through bolt fixed connection with base 1, it has the hole to open on stripper 13, stripper 13 and 3 sliding connection of lower link, stripper 13 passes through compression spring 16 and is connected with base 1, compression spring 16's upper end and base 1 welding promptly, compression spring 16's lower extreme and stripper 13 welding, guide bar 15 runs through base 1, guide bar 15's upper end and pull sleeve 12 welding or interference fit, guide bar 15's lower extreme and stripper 13 welding or interference fit, compression spring 16 overlaps on guide bar 15.

The side wall of the pull sleeve 12 is provided with three through holes along the radial direction, each sliding column 14 is correspondingly arranged in one through hole in a sliding manner, one end of each sliding column 14 is an inclined surface matched with the positioning cone 11, and the other end of each sliding column 14 can be in contact with the annular workpiece 8.

The specific implementation process is as follows:

when the annular workpiece 8 is machined, the lower pull rod 3 moves upwards so as to drive the boss 9 to move upwards, the boss 9 is contacted with the discharging plate 13 and then drives the discharging plate 13, the guide rod 15, the pull sleeve 12 and the sliding column 14 to move upwards, and the compression spring 16 is compressed in the process; place annular worker on support column 7, because gland 5 and upper link 4 pass through bolt fixed connection, be connected back with upper link 4 through four lamella claws 10 and lower link 3, lower link 3 downstream to drive four lamella claws 10, upper link 4 and gland 5 downstream, gland 5 downstream compresses tightly annular workpiece 8 with the up end contact of annular workpiece 8 until gland 5, and then realizes the firm centre gripping to annular workpiece 8.

The boss 9 moves downwards along with the lower pull rod 3 in the process of moving the lower pull rod 3 downwards, the compression spring 16 extends and pushes the discharging plate 13 to move downwards in the process of moving the lower pull rod 3 downwards, so that the guide rod 15, the pull sleeve 12 and the sliding column 14 are driven to move downwards, one end of the sliding column 14, which is an inclined plane, is in contact with the positioning cone 11, the sliding column 14 moves towards one side of the annular workpiece 8 along the through hole in the process of moving the sliding column 14 downwards along with the pull sleeve 12, so that the annular workpiece 8 is positioned through the sliding column 14, and the annular workpiece 8 is positioned through the compression spring 16 by the sliding column 14, so that the annular workpiece 8 cannot be deformed due to the fact that the sliding column 14 positions the annular workpiece 8.

Example two:

on the basis of the first embodiment, as shown in fig. 1, the pull sleeve 12 is provided with a groove 17, the sliding column 14 is connected with a limit pin 18 in a threaded manner, welded or interference fit manner along the radial direction of the sliding column, and the lower end of the limit pin 18 is positioned in the groove 17. The lower pull rod 3 is provided with a strip-shaped groove 19 along the axial direction, the shaft tube 2 is also in threaded connection, welding or interference fit with a limit pin 18 along the radial direction, and the right end of the limit pin 18 is positioned in the strip-shaped groove 19. The dust cover 20 is fixed to the positioning cone 11 by bolts.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims (7)

1. The utility model provides a large-scale thin wall work piece automatic clamp which characterized in that: the clamping mechanism comprises a supporting piece, a lower pull rod and a gland, the supporting piece is fixedly connected with the base, one end of the lower pull rod is connected with the gland, and a boss is fixed on the lower pull rod; positioning mechanism includes the location awl, draw the cover, stripper and a plurality of positioning unit, every positioning unit includes the traveller, guide bar and elastic component, location awl and base fixed connection, stripper and lower link sliding connection and stripper pass through the elastic component and are connected with the base, the guide bar runs through the both ends of base and guide bar and is connected with stripper and draw the cover separately, the lateral wall of drawing the cover is equipped with a plurality of through-holes along its footpath, the traveller slides and sets up in the through-hole, the one end of traveller be with location awl complex inclined plane.

2. The automatic clamp for the large-sized thin-walled workpiece according to claim 1, characterized in that: the clamping mechanism further comprises a shaft tube, a connecting piece and an upper pull rod, the shaft tube is fixedly connected with the base, one end of the lower pull rod is located in the shaft tube and is connected with one end of the upper pull rod through the connecting piece, and the other end of the upper pull rod is fixedly connected with the gland.

3. The automatic clamp for the large-sized thin-walled workpiece according to claim 2, wherein: the connecting piece is four lamella claws, is equipped with the step hole in the central siphon, and four lamella claws can be closed and open in the central siphon.

4. The automatic clamp for the large-sized thin-walled workpiece according to claim 3, wherein: the support piece comprises an inner core and a support column, the inner core is fixedly connected with the base, and the support column is fixedly connected with the inner core.

5. The automatic clamp for the large-sized thin-walled workpiece according to claim 4, wherein: the pull sleeve is provided with a groove, the sliding column is provided with a limiting pin along the radial direction of the sliding column, and the tail end of the limiting pin is positioned in the groove.

6. The automatic clamp for the large-sized thin-walled workpiece according to claim 5, wherein: the positioning cone is fixed with a dust cover.

7. The automatic clamp for the large-sized thin-walled workpiece according to claim 6, wherein: the lower pull rod is provided with a strip-shaped groove along the axial direction, the shaft tube is also provided with a limit pin along the radial direction, and the tail end of the limit pin is positioned in the strip-shaped groove.

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