CN115609302A - Clamp for clamping barrel assembly and clamping method - Google Patents

Abstract

The invention discloses a clamp for clamping a cylinder assembly, which comprises a mandrel, wherein a first positioning assembly and a second positioning assembly are respectively arranged at two ends of the mandrel; the first positioning assembly axially positions and radially limits the first mounting edge; the second positioning assembly is used for axially pressing the second mounting edge so as to axially press the cylinder assembly on the first positioning assembly; the second positioning assembly comprises a pressing piece used for pressing the second mounting edge and an adjusting piece used for adjusting the axial pressing force of the pressing piece. The axial limiting structure of the mandrel enables the two positioning assemblies to keep a fixed axial distance, the lathe thimble is propped against the mandrel, and a workpiece is compressed by the compression piece with controllable axial compression force and is not compressed by the lathe, so that the problem that the machining size is unqualified due to the rebound of the corrugated cylinder piece when the clamping is cancelled after the corrugated cylinder piece is compressed due to overlarge axial compression force of the lathe thimble is avoided.

Description

Clamp for clamping barrel assembly and clamping method

Technical Field

The invention relates to the technical field of engine component repair, in particular to a clamp for a clamping cylinder assembly. In addition, the invention also relates to a clamping method for clamping the cylinder assembly, which comprises the clamp.

Background

After the aero-engine is used for a service life, the aero-engine needs to be returned to a factory for repair, after the cylinder assembly is used along with the aero-engine, the mounting surface deforms to different degrees, and after dimension inspection is carried out, if the cylinder assembly is not qualified, repair is needed.

As shown in figure 1, the cylinder assembly is a thin-wall long cylinder type workpiece and comprises a first mounting edge 1, a conical cylinder part 2, a corrugated cylinder part 3 and a second mounting edge 4 which are sequentially connected from a first end to a second end, the corrugated cylinder part 3 has a buffering effect similar to a spring in the assembly process of an engine, the axial distance changes under the effects of vibration and different thermal expansions between the workpieces in the use process of the engine, the corrugated cylinder limits axial displacement through buffering, and the assembly gap between the workpieces is ensured.

The related dimension and form and position tolerance on each mounting edge of the cylinder assembly can not be guaranteed by the compression corrugated cylinder in the part machining process, otherwise, when the thermal expansion is carried out, the compressive force in the early stage can be released, the dimension is unqualified, the assembly gap is influenced, and the workpiece can crack under severe conditions.

The new piece is processed to the finished product surplus from the blank is enough, but the reworked piece is usually processed with small surplus, and the actual conditions that each reworked piece is out of shape are different, so that the existing turning fixture plays a role in assisting to support the pressing plate 13 which is pressed tightly to lose effect, and the problem of uneven force application when the pressing fixture is pressed tightly and fixed can be caused, and the workpiece processing vibration cutter is not lightened, so that the local stress deformation of the workpiece is caused, and secondly, after the workpiece is processed and taken down from the equipment, the stress part of the corrugated cylinder rebounds to cause unqualified size.

Disclosure of Invention

The invention provides a clamp for clamping a cylinder assembly and a clamping method, and aims to solve the technical problems that a corrugated cylinder is compressed due to overlarge pressing force of a lathe thimble in the conventional clamping mode, and the stressed part of the corrugated cylinder is rebounded after processing and dismantling, so that the size of the corrugated cylinder is not qualified.

The technical scheme adopted by the invention is as follows: a clamp for clamping a cylinder assembly is used for clamping the cylinder assembly to be fixed on a lathe for repair, a first end to a second end of the cylinder assembly comprise a first mounting edge, a conical cylinder assembly, a corrugated cylinder assembly and a second mounting edge which are sequentially connected, and the clamp comprises a mandrel, a first positioning assembly and a second positioning assembly;

the mandrel is used for being connected with a lathe, the first positioning assembly and the second positioning assembly are respectively arranged at two ends of the mandrel and used for clamping the barrel assembly at two ends of the barrel assembly, and the mandrel is provided with an axial limiting structure used for limiting the axial distance between the first positioning assembly and the second positioning assembly;

the first positioning assembly is used for axially positioning and radially limiting the first mounting edge;

the second positioning assembly is used for axially pressing the second mounting edge so as to axially press the barrel assembly on the first positioning assembly; the second positioning assembly comprises a pressing piece used for pressing the second mounting edge and an adjusting piece used for adjusting the axial pressing force of the pressing piece on the second mounting edge, and the second positioning assembly is further used for limiting the second mounting edge in the radial direction.

Preferably, the axial limiting structure comprises a first shoulder formed on the outer wall of the mandrel in a protruding way and a second shoulder formed on the outer wall of the mandrel in a protruding way;

the first shaft shoulder is used for being abutted against the end face of the first positioning component after the first positioning component is sleeved on the first end of the mandrel;

the second shoulder is used for being connected with the end face of the second positioning component after the second end of the mandrel is sleeved with the second positioning component.

As a preferable mode, the first shaft shoulder is provided with a through hole for penetrating a screw, the large end of the screw abuts against the end surface of the first shaft shoulder, and the screw is in threaded connection with the first positioning component so as to axially position the first positioning component on the first shaft shoulder; the second end of the mandrel is provided with external threads and is in threaded connection with a first nut, and the first nut is used for being pressed on the second positioning assembly so as to axially position the second positioning assembly on the second shoulder.

As a preferable mode, the first positioning assembly comprises a first positioning plate which is used for being sleeved on the mandrel and axially positioning on the mandrel, an annular bulge is formed on the first positioning plate, and the annular bulge is used for being abutted against the outer end face of the first mounting edge so as to axially limit the barrel assembly; the end face of the annular bulge is further bulged to form a limiting bulge which is used for being matched with the inner annular face of the first mounting edge or matched with the end hole of the first mounting edge so as to limit the first mounting edge in the radial direction.

As a preferable mode, the first positioning assembly further comprises a pressing plate, and the height of the limiting protrusion is smaller than or equal to the thickness of the first mounting edge; the pressing plate is used for being axially pressed on the inner end face of the first mounting edge and abutted against the end face of the limiting protrusion, the first positioning plate is in threaded connection with a second bolt penetrating through the pressing plate, and the large end of the second bolt is axially pressed on the end face of the pressing plate so that the pressing plate is pressed on the inner end face of the first mounting edge.

As a preferable mode, a first threaded hole for being in threaded connection with the second bolt is formed in the first positioning plate on the inner side of the annular bulge, the second bolt penetrates through the middle of the pressing plate, a second threaded hole with two communicated ends is formed in the pressing plate, and the second threaded hole is in threaded connection with a stud; the stud is used for adjusting the relative position of the end part of the stud and the pressure plate and is abutted against the end surface of the first positioning plate so as to adjust the height of one side of the pressure plate, so that the end surface of the pressure plate is parallel to the inner end surface of the first mounting edge.

As a preferable mode, the second mounting edge has a step structure, the step structure includes an annular end surface and an annular inner wall surface, the second positioning assembly includes a second positioning plate, the axial position of the adjusting member is adjustable and connected to the second positioning plate, the first end surface of the pressing member is disposed in close contact with the annular end surface, the pressing member has a second end surface opposite to the first end surface, one end of the adjusting member facing the pressing member has an angle adapting structure, the angle adapting structure of the adjusting member abuts against the second end surface of the pressing member, and the angle adapting structure is used for enabling the adjusting member to incline relative to the second end surface of the pressing member when abutting against the pressing member, so that the second positioning assembly adapts to the deformation of the annular end surface.

As a preferable mode, the compressing element is provided with an inner cavity, and a second end of the compressing element is provided with a third threaded hole communicated with the inner cavity;

the adjusting piece is of a threaded rod structure, one end of the adjusting piece, facing the pressing piece, is provided with a first threaded section, the length of the first threaded section is matched with the depth of the third threaded hole, the adjusting piece is provided with a movable shaft section connected with the first threaded section, the shaft diameter of the movable shaft section is smaller than the hole diameter of the third threaded hole, the length of the movable shaft section is larger than the depth of the third threaded hole, and the movable shaft section and the third threaded hole are used for matching and limiting the inclination angle of the adjusting piece relative to the second end face of the pressing piece;

the adjusting piece is provided with a second threaded section used for being in threaded connection with the second positioning plate, the second threaded section is in threaded connection with a second nut, and the second nut is used for being screwed into the second threaded section to abut against the end face of the second positioning plate so as to limit the rotation of the adjusting piece to control the axial position of the adjusting piece on the second positioning plate.

As a preferable mode, the pressing device comprises a plurality of pressing pieces, a fourth threaded hole matched with the second threaded section is axially formed in the second positioning plate, the plurality of fourth threaded holes are uniformly distributed in the circumferential direction of the second positioning plate, and the radial position of each fourth threaded hole in the second positioning plate is matched with the radial size of the annular end face of the second mounting edge.

According to another aspect of the present invention, there is also provided a clamping method for clamping a cartridge assembly, the clamping being performed by any one of the above-mentioned clamps, the clamping method including:

the first positioning component is positioned and assembled on a lathe chuck, the first end of a mandrel axially penetrates through the axis position of the first positioning component, and the axial limiting structures of the lathe chuck and the mandrel respectively limit the two end faces of the first positioning component axially so as to realize axial positioning of the first positioning component;

axially positioning and radially limiting a first mounting edge of the barrel assembly on a workpiece positioning structure of a first positioning assembly, wherein the second end of the mandrel penetrates out of the barrel assembly;

and the second end of the mandrel penetrates through the axis of the second positioning component, the first positioning component and the second positioning component keep a fixed axial distance through the axial limiting structure of the mandrel, and the lathe thimble is pushed against the second end of the mandrel.

The invention has the following beneficial effects: the first positioning component is positioned and assembled on a lathe chuck, the first end of a mandrel axially penetrates through the axis position of the first positioning component, the axial limiting structures of the lathe chuck and the mandrel respectively axially limit two end faces of the first positioning component so as to axially position the first positioning component, the first mounting edge of a barrel component is axially positioned and radially limited on the workpiece positioning structure of the first positioning component, the second end of the mandrel penetrates out of the barrel component at the moment, the second end of the mandrel penetrates through the axis of the second positioning component, the first positioning component and the second positioning component keep a fixed axial distance through the axial limiting structure of the mandrel, a lathe thimble props against the second end of the mandrel, one end of the barrel component is positioned on the lathe chuck, the other end of the barrel component is tightly pressed through a pressing component with controllable axial pressing force, the barrel component is not required to be compressed by the pressing force of the lathe thimble, the phenomenon that the corrugated barrel component is not rebounded when clamping is cancelled after the barrel component is machined, and the machining size is unqualified is caused.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a partial cross-sectional view of a clamping structure of a prior art clamp;

FIG. 2 is a partial cross-sectional view of a clip in use according to a preferred embodiment of the present invention;

fig. 3 is an enlarged view of a portion of the positions of the adjustment member and the hold down member of fig. 2.

1. The mounting structure comprises a first mounting edge 2, a conical barrel 3, a corrugated barrel 4, a second mounting edge C, an annular end face 5, a base 6, a first bolt 7, a support 8, a plate 9, a pressing plate 10, a mandrel 101, a first shoulder 102, a second shoulder 103, a screw 104, a bushing 105, a first nut 11, a first positioning plate 111, an annular protrusion 112, a limiting protrusion 113, a first threaded hole 12, a second positioning plate 121, a fourth threaded hole 13, a pressing plate 131, a second threaded hole 14, a second bolt 15, a stud 16, a pressing piece 161, an inner cavity 162, a third threaded hole 17, an adjusting piece 171, an arc-shaped end face 172, a first threaded section 173, a movable shaft section 174, a second threaded section 18, a second nut

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 2, a preferred embodiment of the present invention provides a fixture for clamping a cylinder assembly, which is used for clamping the cylinder assembly (hereinafter referred to as a workpiece) to be fixed on a lathe for repairing, wherein a first end to a second end of the workpiece comprise a first mounting edge 1, a conical cylinder 2, a corrugated cylinder 3 and a second mounting edge 4 which are connected in sequence, the first mounting edge 1 has an annular radial surface which comprises an inner end surface facing the inside of the workpiece and an outer end surface facing the outside; the second mounting edge 4 has a stepped configuration comprising an annular end face and an annular inner wall face;

the fixture comprises a mandrel 10, a first positioning assembly and a second positioning assembly which are coaxially arranged;

the core shaft 10 is used for being connected with a lathe, a first positioning assembly and a second positioning assembly are respectively arranged at two ends of the core shaft 10, the first positioning assembly and the second positioning assembly are used for clamping the barrel assembly at two ends of the barrel assembly, the core shaft 10 penetrates through the barrel assembly before clamping, and the core shaft 10 is provided with an axial limiting structure used for limiting the axial distance between the first positioning assembly and the second positioning assembly;

the first positioning component is provided with a workpiece positioning structure for axially positioning and radially limiting the first mounting edge 1;

the second positioning assembly is used for axially pressing the second mounting edge 4 so as to axially press the cylinder assembly on the first positioning assembly, and is also used for radially limiting the second mounting edge 4; the second positioning assembly comprises a pressing piece 16 and an adjusting piece 17, wherein the pressing piece 16 is used for pressing the second mounting edge 4, and the adjusting piece 17 is used for adjusting the axial pressing force of the pressing piece 16 on the second mounting edge 4.

The working principle of the clamp is as follows: the first positioning component is positioned and assembled on a lathe chuck, the first end of a mandrel 10 axially penetrates through the axis position of the first positioning component, the lathe chuck and the axial limiting structure of the mandrel 10 respectively axially limit two end faces of the first positioning component so as to axially position the first positioning component, a first mounting edge 1 of a cylinder component is axially positioned and radially limited on the workpiece positioning structure of the first positioning component, the second end of the mandrel 10 penetrates out of a workpiece, the second end of the mandrel 10 penetrates through the axis of a second positioning component, the first positioning component and the second positioning component keep a fixed axial distance through the axial limiting structure of the mandrel 10, a second positioning component and a lathe thimble of the lathe are abutted against the second end of the mandrel 10, the workpiece is pressed through a pressing component 16 with controllable axial pressing force and is not influenced by the pressing force of the lathe, the workpiece is kept in a pressing state during the feeding process of the lathe and is not influenced by the pressing force of a machining tool vibration, and the machining size of the cylinder component 3 is not qualified due to rebound after machining due to overlarge axial pressing force of the lathe thimble.

Further, the axial limiting structure of the mandrel 10 comprises a first shoulder 101 formed on the outer wall of the mandrel 10 in a radially protruding manner and a second shoulder 102 formed on the outer wall of the mandrel 10 in a radially protruding manner;

the first shaft shoulder 101 is used for abutting against the end face of the first positioning component after the first positioning component is sleeved on the first end of the mandrel 10; namely, when clamping, the first end of the mandrel 10 is inserted through the axis of the first positioning component to the end surface of the first positioning component and abuts against the first shaft shoulder 101; wherein, one end of the first positioning component facing the lathe chuck is provided with a bushing 104 in the axis position for auxiliary positioning;

the second shoulder 102 is used for abutting against the end face of the second positioning component after the second end of the mandrel 10 is sleeved with the second positioning component; similarly, during clamping, the second end of the mandrel 10 is inserted into the axis of the second positioning assembly and abuts against the second shaft shoulder 102 to the end face of the second positioning assembly, the distance between the outer end faces of the two shaft shoulders is the axial distance between the two positioning assemblies, the axial distances between the two positioning assemblies are relatively fixed, and the axial relative position of the pressing member 16 is adjusted through the adjusting member 17 so as to adapt to the size of the reworked workpiece and adjust the axial pressing force on the reworked workpiece;

specifically, a through hole is axially formed in the first shaft shoulder 101 and used for allowing a screw 103 to penetrate through, the large end of the screw 103 abuts against the end face of the first shaft shoulder 101, and the screw 103 is in threaded connection with the first positioning assembly so as to axially position the first positioning assembly; the second end of the mandrel 10 is externally threaded and is threadedly coupled with a first nut 105. The first nut 105 is threadedly coupled to the mandrel 10 for compressing against the second positioning member to axially position the second positioning member at the second shoulder 102.

Referring to fig. 1, after the barrel assembly in the prior art is used with an engine, the surface a and the surface B of the second mounting edge 4 in the drawing need to be checked and repaired, as shown in fig. 1, the assembly is clamped by using a conventional machining fixture, a workpiece is mounted on a base 5 by positioning and fixing the base 5 to a lathe chuck, the base 5 axially limits the outer end surface of the first mounting edge 1, the inner end surface of the first mounting edge 1 of the workpiece is axially limited and radially limited by adjusting a first bolt 6 and a support 7 and further adjusting a plate 8 with barbs, the second mounting edge 4 of the workpiece is compressed by a compression plate 9, and the compression plate 9 is compressed by the top of the lathe to complete the clamping. Because the first mounting edge 1 is a reference surface of the rest surface machining dimension and form and position tolerance, when the barb of the plate 8 axially limits the inner end surface of the first mounting edge 1, the outer end surface of the first mounting edge 1 is in a suspended state and has no bearing surface and is stressed to deform, and if the plate 8 is not positioned on a horizontal plane when the first bolt 6 and the support 7 are adjusted, the pressing force on the first mounting edge 1 is further increased in an inclined state, so that the existing clamping structure can cause the deformation to influence the machining precision; in addition, when the height and the pressing position of the plate 8 are adjusted by adjusting the first bolt 6 and the support 7, the observation from the inner side of the workpiece is needed, the adjustment and the observation cannot be synchronously carried out, and the operation is inconvenient;

the first positioning assembly of the embodiment comprises a first positioning plate 11 which is used for being sleeved on the mandrel 10 and axially positioning on the mandrel 10, the workpiece positioning structure comprises an annular protrusion 111 which is formed by protruding the end surface of the first positioning plate 11, and the annular protrusion 111 is used for being abutted against the outer end surface of the first mounting edge 1 so as to axially limit the barrel assembly; the workpiece positioning structure further comprises a limiting bulge 112 formed by the end face of the annular bulge 111 in a protruding mode, and the limiting bulge is used for being matched with the inner annular face of the first mounting edge 1 or matched with an end hole of the first mounting edge 1 so as to limit the first mounting edge 1 in the radial direction; it will be appreciated that the radial dimension of the outer annular surface of the annular projection 111 is greater than the radial dimension of the outer end surface of the first mounting edge 1, and the radial dimension of the inner annular surface of the annular projection 111 is less than the radial dimension of the inner end surface of the first mounting edge 1; the limiting protrusion 112 of the present embodiment preferably cooperates with the inner annular surface of the first mounting edge 1, that is, the limiting protrusion 112 is annular, and the radial dimension of the outer annular surface of the limiting protrusion 112 is adapted to the radial dimension of the inner annular surface of the first mounting edge 1; in other embodiments, if the limiting protrusions 112 are configured to be matched with the end holes of the first mounting edge 1, the limiting protrusions 112 are a plurality of cylindrical protrusions formed on the end surface of the annular protrusion 111 corresponding to the outer diameter and the circle center position of each end hole;

based on this, in the embodiment, the end surface of the annular protrusion 111 provided by the workpiece positioning structure is attached to the outer end surface of the first mounting edge 1, and is kept to be tightly attached to the workpiece under the action of the axial pressing force of the second positioning assembly on the workpiece, so that the outer end surface of the first mounting edge 1 is prevented from being suspended, the deformation caused by stress is avoided, the clamping position of the reference surface is ensured, and the repair processing precision of the rest surface of the workpiece is ensured; during clamping operation, axial limiting and radial limiting of the first end of the workpiece can be completed only by correspondingly embedding the annular limiting bulge 112 into the inner annular surface of the first mounting edge 1, and the operation is convenient;

further, the first positioning assembly further includes a pressing plate 13, it can be understood that the height of the limiting protrusion 112 should be smaller than or equal to the thickness of the radial surface of the first mounting edge 1 to be matched, and the pressing plate 13 is used for being axially compressed on the inner end surface of the first mounting edge 1 and abutted against the end surface of the limiting protrusion 112, wherein the first positioning plate 11 is in threaded connection with a second bolt 14 penetrating through the pressing plate 13, the large end of the second bolt 14 is axially compressed on the end surface of the pressing plate 13 to further compress the pressing plate 13 on the inner end surface of the first mounting edge 1, the axial distance between the pressing plate 13 and the first positioning plate 11 is adjusted by adjusting the height of the second bolt 14 to press the pressing plate 13 on the inner end surface of the first mounting edge 1, the pressing plate 13 is simultaneously pressed on the end surface of the limiting protrusion 112 and the inner end surface of the first mounting edge 1, the end surface of the limiting protrusion 112 is added as a contact surface to further improve the parallelism of the pressing plate 13, improve the axial positioning effect, further, the first positioning plate 11 is provided with a threaded hole 131 for being in the inner side of the annular protrusion 111, the middle of the second bolt 113 for being in threaded connection with the second bolt 13, and a threaded hole 131 is provided in the middle of the pressing plate 13, and the second positioning plate 13 is provided with a threaded hole 131, and the second bolt 131; during clamping, the position of the second threaded hole 131 is roughly adjusted to be symmetrical to the position of the limiting protrusion 112 relative to the second bolt 14, the stud 15 is used for adjusting the height of one side of the pressing plate 13, so that the end face of the pressing plate 13 is parallel to the inner end face of the first mounting edge 1, the pressing effect is improved, the adjusting position and the clamping position are both located in a workpiece, and the clamping device can be operated and observed simultaneously and is more convenient.

On the other hand, because the cylinder assembly is a thin-wall long cylinder type workpiece, in order to prevent the machining of the vibrating cutter, the existing fixture is used for assisting and pressing the annular end surface of the step structure of the second mounting edge 4 by arranging the pressing plate 9, but after the workpiece is used for a long time, the annular end surface (such as the C surface shown in fig. 1) of the step structure of the workpiece is usually deformed, the flatness is poor, the pressing plate 9 is actually only locally contacted when being pressed on the C surface, different workpieces are deformed to cause different contact positions, after the lathe center applies force to press, only local stress is applied to the workpiece, the force is uneven, the effect of lightening the machining vibrating cutter of the workpiece is not achieved, if the pressing force of the center is increased to increase the contact range of the pressing plate 9 and the workpiece surface, the local stress deformation is caused, and after the workpiece is machined and is taken off from the existing fixture, the stress part of the corrugated cylinder rebounds to cause unqualified size;

the second positioning component of this embodiment includes the second positioning plate 12, the axial position of the adjusting member 17 is adjustable and connected to the second positioning plate 12, the first end surface of the pressing member 16 is disposed to abut against the annular end surface, the pressing member 16 has a second end surface opposite to the first end surface, one end of the adjusting member 17 facing the pressing member 16 has an angle adapting structure, in this embodiment, the angle adapting structure is an arc-shaped end surface 171 formed at an end portion of the adjusting member 17 facing the end portion of the pressing member 16, the arc-shaped end surface 171 of the adjusting member 17 abuts against the second end surface of the pressing member 16, and the arc-shaped end surface 171 is used for enabling the adjusting member 17 to incline relative to the second end surface of the pressing member 16 when abutting against the pressing member 16, so as to enable the second positioning component to adapt to the deformation of the annular end surface; other embodiments should not be limited, such as providing the end of the adjustment member 17 with a ball-bar configuration or with a hinge configuration, etc.; it can be understood that the pressing member 16 may be an annular block adapted to the annular end surface of the step structure of the second mounting edge 4, or may be a plurality of pressing blocks uniformly arranged on the annular end surface of the step structure of the second mounting edge 4;

based on this, the second positioning assembly of the present embodiment is provided with an adjusting member 17 with an adjustable axial position, and under the condition that the axial positions of the first positioning assembly and the second positioning assembly are fixed, the axial position of the adjusting member 17 on the second positioning plate 12 can be adjusted to adapt to the axial size of the workpiece, and further the axial position thereof can be adjusted, that is, the axial pressing force of the pressing member 16 on the second mounting edge 4 can be adjusted; under the condition that the surface C is deformed, the pressing piece 16 is kept attached to the surface C, and based on the arc-shaped structure of the end part of the adjusting piece 17, when the end part of the adjusting piece 17 is abutted to the pressing piece 16, the end part of the adjusting piece 17 and the pressing piece form a certain inclination angle so as to adapt to the deformation of the annular end surface, ensure uniform force application on a workpiece, reduce the influence of a machining vibration cutter, avoid local stress deformation, avoid rebound after machining due to overlarge axial pressing force of the corrugated cylinder and improve the machining precision and the qualification rate;

further, the pressing member 16 has an inner cavity 161, and a second end of the pressing member 16 is provided with a third threaded hole 162 communicating with the inner cavity 161; the adjusting piece 17 is of a threaded rod structure, one end of the adjusting piece 17, which faces the pressing piece 16, is provided with a first threaded section 172, the length of the first threaded section 172 is matched with the depth of the third threaded hole 162, the adjusting piece 17 is provided with a movable shaft section 173 connected with the first threaded section 172, the shaft diameter of the movable shaft section 173 is smaller than the hole diameter of the third threaded hole 162, the length of the movable shaft section 173 is larger than the depth of the third threaded hole 162, and the movable shaft section 173 and the third threaded hole 162 are used for matching and limiting the inclination angle of the adjusting piece 17 relative to the second end face of the pressing piece 16; the adjusting piece 17 is provided with a second thread section 174 for being in threaded connection with the second positioning plate 12, the second thread section 174 is in threaded connection with a second nut 18, and the second nut 18 is used for being screwed into the second thread section 174 and abutting against the end face of the second positioning plate 12 to limit the adjusting piece 17 to rotate; based on this, the adjusting part 17 is fixed in the radial position of the second positioning plate 12, the first thread section 172 is screwed into the inner cavity 161 through the third threaded hole 162, the shaft diameter of the movable shaft section 173 is smaller than the aperture of the third threaded hole 162, so that the first thread section 172 has a certain movable space in the inner cavity 161, and the radial position range of the pressing part 16 is limited at the same time, and further, the radial limit effect is provided for the annular inner wall surface of the 4-step structure of the second mounting edge, the first thread section 172 is screwed into the inner cavity 161 of the pressing part 16, and further, the pressing part 16 is prevented from being free of support and being loosened and falling out during clamping operation and disassembly, and the situations of part falling, missing damage and the like are avoided.

In this embodiment, preferably, a plurality of arc-shaped block-shaped pressing members 16 are provided, a fourth threaded hole 121 adapted to the second threaded section 174 is axially formed in the second positioning plate 12, the plurality of fourth threaded holes 121 are uniformly arranged in the circumferential direction of the second positioning plate 12, and the radial position of the fourth threaded hole 121 in the second positioning plate 12 is adapted to the radial size of the annular end surface of the second mounting edge 4, so as to control the radial position of the adjusting member 17 and further control the radial position of the pressing member 16, thereby having a radial positioning effect on the second mounting edge 4.

On the other hand, the present embodiment also provides a cartridge assembly clamping method, which clamps a cartridge assembly by the clamp of the present embodiment, and the method includes:

the first positioning component is positioned and assembled on a lathe chuck, the first end of a mandrel 10 axially penetrates through the axis position of the first positioning component, and the lathe chuck and the axial limiting structure of the mandrel 10 respectively axially limit two end faces of the first positioning component so as to axially position the first positioning component;

axially positioning and radially limiting the first mounting edge 1 of the barrel assembly on a workpiece positioning structure of a first positioning assembly, wherein the second end of the mandrel 10 penetrates out of the barrel assembly;

the second end of the mandrel 10 is arranged in the axis of the second positioning component in a penetrating mode, the first positioning component and the second positioning component are kept at a fixed axial distance through the axial limiting structure of the mandrel 10, and the lathe thimble is jacked at the second end of the mandrel 10.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A clamp for clamping a cylinder assembly, wherein a first end to a second end of the cylinder assembly comprise a first mounting edge (1), a conical cylinder assembly (2), a corrugated cylinder assembly (3) and a second mounting edge (4) which are sequentially connected, and the clamp is characterized by comprising a mandrel (10), a first positioning assembly and a second positioning assembly;

the mandrel (10) is used for being connected with a lathe, the first positioning assembly and the second positioning assembly are respectively arranged at two ends of the mandrel (10), the first positioning assembly and the second positioning assembly are used for clamping the barrel assembly at two ends of the barrel assembly, and the mandrel (10) is provided with an axial limiting structure used for limiting the axial distance between the first positioning assembly and the second positioning assembly;

the first positioning component is used for axially positioning and radially limiting the first mounting edge (1);

the second positioning assembly is used for axially pressing the second mounting edge (4) so as to axially press the barrel assembly on the first positioning assembly, and is also used for radially limiting the second mounting edge (4); the second positioning assembly comprises a pressing piece (16) used for pressing the second mounting edge (4) and an adjusting piece (17) used for adjusting the axial pressing force of the pressing piece (16) on the second mounting edge (4).

2. A clamp for clamping a cartridge assembly according to claim 1, wherein the axial stop formation comprises a first shoulder (101) formed radially projecting from the outer wall of the spindle (10) and a second shoulder (102) formed radially projecting from the outer wall of the spindle (10);

the first shaft shoulder (101) is used for being abutted against the end face of the first positioning component after the first positioning component is sleeved on the first end of the mandrel (10);

the second shoulder (102) is used for being abutted against the end face of the second positioning component after the second positioning component is sleeved on the second end of the mandrel (10).

3. The clamp for clamping the barrel assembly as recited in claim 2, characterized in that the first shaft shoulder (101) is provided with a through hole for passing a screw (103), the big end of the screw (103) abuts against the end surface of the first shaft shoulder (101) and the screw (103) is in threaded connection with the first positioning assembly so as to axially position the first positioning assembly on the first shaft shoulder (101); the second end of the mandrel (10) is provided with external threads and is in threaded connection with a first nut (105), and the first nut (105) is used for being pressed on the second positioning component so as to axially position the second positioning component on the second shoulder (102).

4. A clamp for clamping a cartridge assembly according to claim 1, wherein the first locating assembly comprises a first locating plate (11) for sleeving the mandrel (10) and axially locating on the mandrel (10), the first locating plate (11) being formed with an annular projection (111), the annular projection (111) being adapted to abut against an outer end face of the first mounting edge (1) to axially locate the cartridge assembly; the end face of the annular protrusion (111) is further protruded to form a limiting protrusion (112) which is used for being matched with the inner annular face of the first mounting edge (1) or matched with the end hole of the first mounting edge (1) so as to limit the first mounting edge (1) in the radial direction.

5. The clamp for clamping the cylinder assembly as recited in claim 4, characterized in that the first positioning assembly further comprises a pressure plate (13), the height of the limiting protrusion (112) is less than or equal to the thickness of the first mounting edge (1); the pressing plate (13) is used for being axially pressed on the inner end face of the first mounting edge (1) and abutted against the end face of the limiting protrusion (112), the first positioning plate (11) is in threaded connection with a second bolt (14) penetrating through the pressing plate (13), and the large end of the second bolt (14) is axially pressed on the end face of the pressing plate (13) so that the pressing plate (13) is pressed on the inner end face of the first mounting edge (1).

6. The clamp for clamping the barrel assembly as recited in claim 5, characterized in that the first positioning plate (11) is provided with a first threaded hole (113) for being in threaded connection with the second bolt (14) at the inner side of the annular protrusion (111), the second bolt (14) is arranged in the middle of the pressure plate (13) in a penetrating manner, the pressure plate (13) is further provided with a second threaded hole (131) with two ends communicated, and the second threaded hole (131) is in threaded connection with a stud (15); the stud (15) is used for adjusting the relative position of the end part of the stud and the pressure plate (13) and is abutted against the end surface of the first positioning plate (11) so as to adjust the height of one side of the pressure plate (13) to enable the end surface of the pressure plate (13) to be parallel to the inner end surface of the first mounting edge (1).

7. The clamp for clamping a cylinder assembly according to any one of claims 1 to 6, wherein the second mounting edge (4) has a step structure, the step structure comprises an annular end surface and an annular inner wall surface, the second positioning assembly comprises a second positioning plate (12), the adjusting member (17) is connected to the second positioning plate (12) in an adjustable axial position, the first end surface of the pressing member (16) is arranged to be abutted against the annular end surface, the pressing member (16) has a second end surface opposite to the first end surface, one end of the adjusting member (17) facing the pressing member (16) has an angle adapting structure, the angle adapting structure of the adjusting member (17) abuts against the second end surface of the pressing member (16), and the angle adapting structure is used for enabling the adjusting member (17) to be inclined relative to the second end surface of the pressing member (16) when abutting against the pressing member (16) so as to enable the second positioning assembly to adapt to the deformation of the annular end surface.

8. The clamp for clamping the cylinder assembly as recited in claim 7, characterized in that the pressing member (16) is provided with an inner cavity (161), and a second end of the pressing member (16) is provided with a third threaded hole (162) communicated with the inner cavity (161);

the adjusting piece (17) is in a threaded rod structure, one end of the adjusting piece (17) facing the pressing piece (16) is provided with a first threaded section (172), the length of the first threaded section (172) is matched with the depth of the third threaded hole (162), the adjusting piece (17) is provided with a movable shaft section (173) connected with the first threaded section (172), the shaft diameter of the movable shaft section (173) is smaller than the hole diameter of the third threaded hole (162), the length of the movable shaft section (173) is larger than the depth of the third threaded hole (162), and the movable shaft section (173) and the third threaded hole (162) are used for matching and limiting the inclination angle of the adjusting piece (17) relative to the second end face of the pressing piece (16);

the adjusting piece (17) is provided with a second threaded section (174) used for being in threaded connection with the second positioning plate (12), the second threaded section (174) is in threaded connection with a second nut (18), and the second nut (18) is used for screwing the second threaded section (174) to abut against the end face of the second positioning plate (12) so as to limit the adjusting piece (17) to rotate and control the axial position of the adjusting piece (17) on the second positioning plate (12).

9. The clamp for clamping the cylinder assembly as recited in claim 8, characterized in that the clamp comprises a plurality of the pressing members (16), the second positioning plate (12) is axially provided with fourth threaded holes (121) matched with the second threaded sections (174), the plurality of the fourth threaded holes (121) are uniformly arranged in the circumferential direction of the second positioning plate (12), and the radial positions of the fourth threaded holes (121) in the second positioning plate (12) are matched with the radial dimension of the annular end surface of the second mounting edge (4).

10. A clamping method for a clamping cylinder assembly, characterized in that the tapered cylinder and the corrugated cylinder are clamped by the clamp of any one of claims 1 to 9, the clamping method comprising:

the first positioning component is positioned and assembled on a lathe chuck, the first end of a mandrel (10) axially penetrates through the axis position of the first positioning component, and the axial limiting structures of the lathe chuck and the mandrel (10) respectively axially limit two end faces of the first positioning component so as to realize axial positioning of the first positioning component;

axially positioning and radially limiting a first mounting edge (1) of the barrel assembly on a workpiece positioning structure of a first positioning assembly, wherein the second end of a mandrel (10) penetrates out of the barrel assembly;

and a second end of the mandrel (10) is arranged on the axis of the second positioning component in a penetrating mode, the first positioning component and the second positioning component keep a fixed axial distance through an axial limiting structure of the mandrel (10), and a lathe thimble is jacked at the second end of the mandrel (10).

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