CN219358782U - Internal expansion clamping fixture - Google Patents

Abstract

The utility model belongs to the technical field of clamping and relates to an internal expansion clamping fixture which comprises a base, an axial positioning assembly positioned in the middle of the base, an angle positioning assembly positioned at one side of the axial positioning assembly and a clamping assembly positioned at the periphery of the axial positioning assembly, wherein the axial positioning assembly comprises a hollow cylinder body, a supporting positioning shaft arranged at the upper part of the cylinder body, a piston chuck axially stretching in the cylinder body, a conical sleeve connected to the upper part of the cylinder body and an elastic internal expansion body positioned between the conical sleeve and the supporting positioning shaft, the conical sleeve is provided with an internal conical surface with a large outer part and a small inner part, the elastic internal expansion body is provided with an external conical surface contacted with the internal conical surface and a clamping groove positioned at the lower part, and a plurality of hooks penetrating through the upper surface of the cylinder body and clamping the clamping groove are uniformly distributed on the piston chuck. The cylinder body and the piston chuck in the clamp form a cylinder for driving the elastic inner expansion body to stretch, and the elastic inner expansion body is subjected to the reaction force of the conical sleeve in the descending process to clamp the turbine shell, so that the back surface position of the turbine hole is conveniently machined.

Description

Internal expansion clamping fixture

Technical Field

The utility model relates to the technical field of clamping, in particular to an internal expansion clamping fixture.

Background

As shown in fig. 1, there is a turbine casing 1 having a turbine hole 11 and an outlet face 12, an inlet face of the turbine hole 11 being provided with a flange 111, and an outlet hole 121 in the middle of the outlet face 12. The turbine hole 11 is used for installing a turbine, and is used for sucking in gas and sending out from the gas outlet hole 121. The back surface of the turbine hole 11 needs to be finished, and forces in multiple directions are generated during machining, so that the clamp needs to consider omnibearing propping when clamping the turbine hole, otherwise, once the clamp shifts, the precision is reduced, even products are scrapped, and a plurality of clamping positions are required for the turbine shell 1.

A special fixture needs to be developed for the turbine casing of this structure.

Disclosure of Invention

The utility model aims to provide an internal expansion clamping fixture which can firmly fix a turbine shell with a flange so as to process the back surface position of a turbine hole.

The utility model realizes the aim through the following technical scheme: the utility model provides an interior inflation clamping jig, includes the base, is located axial positioning assembly in the middle of the base, be located axial positioning assembly one side angular positioning assembly and be located the peripheral clamping assembly of axial positioning assembly, axial positioning assembly includes hollow cylinder body, locates the support locating shaft on cylinder body upper portion, along the flexible piston chuck of axial in the cylinder body, connect in the toper cover on cylinder body upper portion and be located the toper cover with support the interior conical surface of interior small in the toper cover between the locating shaft, the interior conical surface of toper cover has outside, the interior conical surface of elasticity have with interior conical surface contact and the draw-in groove that is located the lower part, the equipartition has a plurality of and passes on the piston chuck the cylinder body upper surface and colludes the claw of draw-in groove.

Specifically, the angle positioning assembly comprises a fixed seat, an angle reference block positioned on one side of the fixed seat and an angle propping mechanism used for propping the turbine shell on the angle reference block, wherein an angle positioning cylinder is further arranged on the fixed seat and drives an angle positioning rod extending into an air outlet hole of the turbine shell.

Further, the angle propping mechanism comprises a clamping swing block which is arranged in the fixing seat in a rotating manner by taking the vertical rotating shaft as a center, a propping cylinder for pushing the clamping swing block to prop against the turbine shell, and a loosening cylinder for pushing the clamping swing block to loosen the turbine shell.

Furthermore, a spring which acts on the clamping swing block and assists the clamping swing block to clamp the turbine shell is arranged in the fixing seat.

Further, the angle positioning assembly further comprises a first rough positioning rod for supporting the air outlet face of the turbine shell from the obliquely lower side, a second rough positioning rod for limiting the air outlet face of the turbine shell from the oblique side Fang Xianwei and a third rough positioning rod for limiting the air outlet face of the turbine shell from the front side.

Specifically, a supporting block for supporting the lower part of the turbine shell is arranged above the conical sleeve.

Specifically, the clamping assembly comprises an upper clamping assembly, the upper clamping assembly comprises a lever oil cylinder arranged on the base and a pressing plate driven by the lever oil cylinder, and the pressing plate downwards presses the turbine shell on the axial positioning assembly.

Further, the clamping assembly further includes a first side clamping assembly, a second side clamping assembly, and a third side clamping assembly disposed about the axial positioning assembly.

The technical scheme has the beneficial effects that:

the cylinder body and the piston chuck in the clamp form a cylinder for driving the elastic inner expansion body to stretch, and the elastic inner expansion body is subjected to the reaction force of the conical sleeve in the descending process to clamp the turbine shell, so that the back surface position of the turbine hole is conveniently machined.

Drawings

FIG. 1 is a perspective view of a turbine shell;

FIG. 2 is a perspective view of an embodiment inner expansion clamp clamping a turbine shell;

FIG. 3 is a top view of the expansion gripping clamp in a clamped state in an embodiment;

FIG. 4 is a front view of the expansion gripping clamp in an open condition in an embodiment;

FIG. 5 is a perspective view of the angular positioning assembly;

FIG. 6 is a perspective view of the axial positioning assembly with the cone sleeve removed;

FIG. 7 is a cross-sectional view of the axial positioning assembly.

The figures represent the numbers:

1-turbine shell, 11-turbine holes, 111-flanges, 12-air outlet surfaces and 121-air outlet holes;

2-a base;

the device comprises a 3-axial positioning assembly, a 31-cylinder body, a 32-supporting positioning shaft, a 33-piston chuck, 331-claws, 34-conical sleeves, 341-supporting blocks, 35-elastic inner expansion bodies, 351-clamping grooves and 352-outer conical surfaces;

the device comprises a 4-angle positioning component, a 41-fixed seat, a 42-angle reference block, a 43-angle tightening mechanism, a 431-clamping swing block, a 432-rotating shaft, a 433-tightening cylinder, a 434-loosening cylinder, a 435-spring, a 44-angle positioning cylinder, a 441-angle positioning rod, a 45-first coarse positioning rod, a 46-second coarse positioning rod and a 47-third coarse positioning rod;

the upper clamping component, the lever oil cylinder and the pressing plate are respectively arranged at the upper part and the lower part of the clamping component, wherein the upper clamping component is arranged at the lower part;

61-first side clamping assembly, 62-second side clamping assembly, 63-third side clamping assembly.

Detailed Description

The present utility model will be described in further detail with reference to specific examples.

Examples:

as shown in fig. 1 to 7, an inner expansion clamping fixture of the present utility model comprises a base 2, an axial positioning component 3 located in the middle of the base 2, an angle positioning component 4 located at one side of the axial positioning component 3, and a clamping component located at the periphery of the axial positioning component 3, wherein the axial positioning component 3 comprises a hollow cylinder 31, a supporting positioning shaft 32 arranged at the upper part of the cylinder 31, a piston chuck 33 axially extending and contracting in the cylinder 31, a conical sleeve 34 connected at the upper part of the cylinder 31, and an elastic inner expansion body 35 located between the conical sleeve 34 and the supporting positioning shaft 32, the conical sleeve 34 has an inner conical surface (not labeled) with a large outer side and a small inner side, the elastic inner expansion body 35 has an outer conical surface 352 in contact with the inner conical surface, and a clamping groove 351 located at the lower part, and a plurality of hooks 331 penetrating the upper surface of the cylinder 31 and hooking the clamping groove 351 are uniformly distributed on the piston chuck 33. The support positioning shaft 32 is recessed between the elastic inner expansion bodies 35, on the one hand, as a basis for the end faces of the turbine bores 11 of the turbine housing 1 and, on the other hand, also as a guide element for the elastic inner expansion bodies 35. The axial positioning assembly 3 is an assembly resembling an oil cylinder, and the piston holder 33 is hydraulically driven and axially retractable. The piston chuck 33 drives the elastic inner expansion body 35 to axially stretch by utilizing the cooperation of the hook claw 331 and the clamping groove 351, but the elastic inner expansion body 35 is limited by the conical sleeve 34 and can be subjected to an inward component force when descending, so that the elastic inner expansion body 35 can tightly clamp the flange 111. The cylinder body 31 and the piston chuck 33 in the clamp form a cylinder for driving the elastic inner expansion body 35 to stretch, and the elastic inner expansion body 35 is subjected to the reaction force of the conical sleeve 34 in the descending process to clamp the turbine shell 1, so that the back surface position of the turbine hole 11 is conveniently machined.

As shown in fig. 3, the angular positioning assembly 4 includes a fixed seat 41, an angular reference block 42 located at one side of the fixed seat 41, and an angular tightening mechanism 43 for tightening the turbine shell 1 against the angular reference block 42, and the fixed seat 41 is further provided with an angular positioning cylinder 44, where the angular positioning cylinder 44 drives an angular positioning rod 441 extending into the air outlet hole 121 of the turbine shell 1. The angular positioning assembly 4 can help the turbine shell 1 to perform angular positioning, specifically, the air outlet face 12 of the turbine shell 1 leans against the angular reference block 42, the angular tightening mechanism 43 clamps the air outlet face, and the angular positioning rod 441 extends into the air outlet hole 121, so that the turbine shell 1 cannot swing.

As shown in fig. 3 and 5, the angle tightening mechanism 43 includes a clamp swing block 431 rotatably provided in the fixed base 41 about a vertical rotation shaft 432, a tightening cylinder 433 that pushes the clamp swing block 431 against the turbine casing 1, and a loosening cylinder 434 that pushes the clamp swing block 431 to loosen the turbine casing 1. The clamping pendulum 431 is driven by double cylinders, and clamps the turbine shell 1 when the tightening cylinder 433 extends and the loosening cylinder 434 retracts; otherwise, the turbine shell 1 is loosened, so that the clamping is prevented from being too tight to cause shell clamping.

As shown in fig. 5, a spring 435 is provided in the fixed seat 41, which acts on the clamping pendulum 431 and helps it to clamp the turbine housing 1. The spring 435 can help the clamping pendulum 431 maintain the clamping of the turbine housing 1, avoiding loosening during machining and creating machining accuracy problems.

As shown in fig. 3, the angular positioning assembly 4 further includes a first rough positioning rod 45 supporting the air outlet face 12 of the turbine housing 1 from obliquely below, a second rough positioning rod 46 spacing the air outlet face 12 of the turbine housing 1 from obliquely sideways, and a third rough positioning rod 47 spacing the air outlet face 12 of the turbine housing 1 from the front. The first rough positioning bar 45, the second rough positioning bar 46, and the third rough positioning bar 47 can preliminarily define the position of the air outlet surface 12 from three directions, so that after the turbine housing 1 is in place

As shown in fig. 7, a supporting block 341 for supporting the lower portion of the turbine housing 1 is provided above the taper sleeve 34. The supporting block 341 can avoid the outer side of the flange 111 of the turbine housing 1 from being in a suspended state, and increase the processing stability.

As shown in fig. 2 to 4, the clamping assembly includes an upper clamping assembly 5, and the upper clamping assembly 5 includes a lever cylinder 51 provided on the base 2 and a pressing plate 52 driven by the lever cylinder 51, the pressing plate 52 pressing the turbine housing 1 downward on the axial positioning assembly 3. The turbine housing 1 is held down in the lower part and is pressed against the upper clamping assembly 5 to ensure axial positioning. When the lever cylinder 51 is opened, the pressing plate 52 leaves the upper projection range of the axial positioning assembly 3, and the positioning of the turbine housing 1 is not affected.

As shown in fig. 2-4, the clamping assembly further includes a first side clamping assembly 61, a second side clamping assembly 62, and a third side clamping assembly 63 disposed about the axial positioning assembly. The first side clamping assembly 61, the second side clamping assembly 62 and the third side clamping assembly 63 can clamp the outer wall of the turbine housing 1 from three directions of substantially 120 ° respectively, so that the turbine housing 1 can be better prevented from shaking during processing.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (8)

1. The utility model provides an interior inflation clamping jig, includes the base, is located axial positioning assembly in the middle of the base, be located angular positioning assembly of axial positioning assembly one side and be located the peripheral clamping assembly of axial positioning assembly, its characterized in that: the axial positioning assembly comprises a hollow cylinder body, a supporting positioning shaft arranged on the upper portion of the cylinder body, a piston chuck axially extending and contracting in the cylinder body, a conical sleeve connected to the upper portion of the cylinder body, and an elastic inner expansion body arranged between the conical sleeve and the supporting positioning shaft, wherein the conical sleeve is provided with an inner conical surface with a large outer side and a small inner side, the elastic inner expansion body is provided with an outer conical surface in contact with the inner conical surface and a clamping groove arranged on the lower portion, and a plurality of claws penetrating through the upper surface of the cylinder body and hooking the clamping groove are uniformly distributed on the piston chuck.

2. The inner expanding clamp of claim 1, wherein: the angle positioning assembly comprises a fixed seat, an angle reference block positioned on one side of the fixed seat and an angle propping mechanism used for propping the turbine shell on the angle reference block, wherein an angle positioning cylinder is further arranged on the fixed seat and drives an angle positioning rod extending into an air outlet hole of the turbine shell.

3. The inner expanding clamp of claim 2, wherein: the angle propping mechanism comprises a clamping swing block which is arranged in the fixing seat in a rotating mode by taking a vertical rotating shaft as a center, a propping cylinder which pushes the clamping swing block to prop against the turbine shell, and a loosening cylinder which pushes the clamping swing block to loosen the turbine shell.

4. The internal expanding clamp of claim 3, wherein: and a spring which acts on the clamping swing block and assists the clamping swing block to clamp the turbine shell is arranged in the fixing seat.

5. The inner expanding clamp of claim 2, wherein: the angular positioning assembly further includes a first coarse positioning bar supporting the outlet face of the turbine shell from obliquely below, a second coarse positioning bar supporting the outlet face of the turbine shell from obliquely side Fang Xianwei, and a third coarse positioning bar limiting the outlet face of the turbine shell from the front.

6. The inner expanding clamp of claim 1, wherein: and a supporting block used for supporting the lower part of the turbine shell is arranged above the conical sleeve.

7. The inner expanding clamp of claim 1, wherein: the clamping assembly comprises an upper clamping assembly, the upper clamping assembly comprises a lever oil cylinder arranged on the base and a pressing plate driven by the lever oil cylinder, and the pressing plate presses the turbine shell downwards on the axial positioning assembly.

8. The inner expanding clamp of claim 7, wherein: the clamping assembly further includes a first side clamping assembly, a second side clamping assembly, and a third side clamping assembly disposed about the axial positioning assembly.