CN109482924B - Clamping structure and machine tool with same - Google Patents
Clamping structure and machine tool with same Download PDFInfo
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- CN109482924B CN109482924B CN201811555262.9A CN201811555262A CN109482924B CN 109482924 B CN109482924 B CN 109482924B CN 201811555262 A CN201811555262 A CN 201811555262A CN 109482924 B CN109482924 B CN 109482924B
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- 230000007246 mechanism Effects 0.000 claims description 36
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 230000008602 contraction Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 13
- 125000006850 spacer group Chemical group 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000003754 machining Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/4006—Gripping the work or tool by a split sleeve
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention provides a clamping structure and a machine tool with the same, wherein the clamping structure is used for clamping a part to be machined and comprises the following components: a clamping portion, at least part of which is arranged in the inner hole of the part to be processed and is movably arranged along the radial direction of the inner hole; the driving assembly is in driving connection with the clamping part and is used for driving at least part of the clamping part to move along the radial direction of the inner hole by a preset distance so as to enable at least part of the clamping part to be attached to the wall of the inner hole. The clamping structure solves the problem that clamping of a part to be machined is time-consuming in the prior art.
Description
Technical Field
The invention relates to the field of workpiece clamping machinery, in particular to a clamping structure and a machine tool with the same.
Background
In the prior art, in the process of machining a barrel part, a clamp is required to clamp the part, so that the part and a main shaft of a machine tool synchronously rotate to realize turning. Clamping of such parts is typically in the form of an outer clamp and an inner brace. If the outer clamping mode is adopted, the end face and the inner and outer chamfer can only be machined on the far end of the main shaft during machining, and the near end can be machined only after the far end is machined, and turning around and secondary clamping are required, so that the overall machining efficiency can be affected.
Disclosure of Invention
The invention mainly aims to provide a clamping structure and a machine tool with the same, so as to solve the problem that clamping of a part to be machined in the prior art is time-consuming.
In order to achieve the above object, according to one aspect of the present invention, there is provided a clamping structure for clamping a part to be machined, the clamping structure comprising: a clamping portion, at least part of which is arranged in the inner hole of the part to be processed and is movably arranged along the radial direction of the inner hole; the driving assembly is in driving connection with the clamping part and is used for driving at least part of the clamping part to move along the radial direction of the inner hole by a preset distance so as to enable at least part of the clamping part to be attached to the wall of the inner hole.
Further, the clamping portion is provided with a first penetrating hole, and at least part of the driving assembly is arranged in the first penetrating hole and is movably arranged along the extending direction of the first penetrating hole so as to drive at least part of the clamping portion to move along the radial direction of the inner hole.
Further, the clamping portion is an elastic piece, an opening gap is formed in the clamping portion and is communicated with the first penetrating hole, and when the driving assembly moves along the extending direction of the first penetrating hole, at least part of the clamping portion is elastically deformed along the radial direction of the inner hole.
Further, the plurality of opening gaps are provided, and the plurality of opening gaps are arranged at intervals along the circumferential direction of the clamping portion.
Further, the opening gap includes a first gap section, and the clamping portion includes: the fixture body is arranged in the inner hole, and the first gap section is arranged on the fixture body; wherein the clamping sections between two adjacent first gap sections are movably arranged along the radial direction of the inner hole.
Further, the first gap section extends along the extending direction of the clamp body to divide the clamp body into a plurality of clamping sections, and the plurality of clamping sections are movably arranged in synchronization along the radial direction of the inner hole.
Further, the clamp body is a cylinder, the inner hole is a round hole, an annular bulge is arranged on the circumferential outer surface of the clamp body, and the annular bulge is used for limiting contact with the hole wall of the inner hole.
Further, the opening gap includes a second gap section, the first gap section and the second gap section are in communication, and the clamping portion further includes: the first end of the switching section is connected with the fixture body, and the second end of the switching section is used for being connected with the preset mechanism; the second gap section is arranged on the switching section, the second gap is a groove, and a part of switching section body of the switching section is movably arranged along the radial direction of the inner hole.
Further, the clamping portion is made of 65Mn material.
Further, the drive assembly includes: the inner supporting part comprises a conical body which is arranged in the first penetrating hole; and the first end of the pull rod part is connected with one end of the inner support part far away from the conical body, and the second end of the pull rod part is used for being connected with a preset power mechanism, so that when the preset power mechanism drives the inner support part to move along the extending direction of the first penetrating hole through the pull rod part, at least part of the conical body driving clamping part moves along the radial direction of the inner hole.
Further, the first through hole comprises a conical hole section, the conical body is movably arranged in the conical hole section, and the shrinkage direction of the conical hole section is consistent with the shrinkage direction of the conical body.
Further, the plurality of opening gaps are uniformly distributed in the circumferential direction of the clamping portion.
Further, the clamping structure further includes: the first end of the mandrel is used for being connected with the preset mechanism, and the second end of the mandrel is connected with the clamping part, so that the clamping part is connected with the preset mechanism through the mandrel; the driving assembly penetrates through the mandrel and then is connected with a preset power mechanism, and the driving assembly is movably arranged along the axial direction of the mandrel.
Further, the clamping structure further includes: the disc spring group is sleeved on the driving assembly, the first end of the disc spring group is abutted against the mandrel, and the second end of the disc spring group is abutted against the driving assembly.
Further, the preset mechanism includes a rotation driving part and a fixing part, and the clamping structure further includes: the shaft sleeve is connected with the fixed part, the mandrel penetrates through the shaft sleeve and then is connected with the clamping part, and the shaft sleeve and the part to be processed are arranged at intervals; the rotary driving part is in driving connection with the mandrel so as to drive the mandrel to rotate relative to the shaft sleeve.
According to another aspect of the invention, there is provided a machine tool comprising a clamping structure and a preset mechanism, the clamping structure being provided on the preset mechanism, the clamping structure being as described above.
The clamping structure of the invention can stably mount the part to be processed on the preset mechanism through the clamping part and the driving assembly. In the specific clamping process, the clamping part is used for being connected with the preset mechanism, at least part of the clamping part is used for being arranged in an inner hole of a part to be machined, the first end of the driving assembly is in driving connection with the clamping part, and the driving assembly drives at least part of the clamping part to move along the radial direction of the inner hole until at least part of the clamping part is attached to the wall of the inner hole, so that the part to be machined is stably clamped on the clamping part. The clamping structure disclosed by the invention has the advantages that as the clamping part belongs to internal clamping, secondary clamping is not needed in the processing process, so that the processing time is shortened, and the problem that the clamping of a part to be processed in the prior art is time-consuming is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic view of an application structure of an embodiment of a clamping structure according to the invention;
FIG. 2 shows a schematic cross-sectional view of the clamping structure of FIG. 1;
fig. 3 shows a schematic structural view of an embodiment of a clamping structure according to the invention.
Wherein the above figures include the following reference numerals:
10. a part to be processed; 11. an inner bore; 20. a clamping part; 21. a first through hole; 211. a tapered bore section; 22. an opening gap; 23. a clamp body; 231. an annular protrusion; 24. a transfer section; 30. a drive assembly; 31. an inner support part; 311. a cone; 32. a pull rod part; 40. a mandrel; 50. a disc spring set; 60. a shaft sleeve; 70. angular contact ball bearings; 80. a front inner spacer ring; 90. a front outer spacer ring; 100. a front inner spacer; 120. a rear flange; 130. the first spacer bush; 140. the second spacer bush; 150. a straight shaft coupling; 160. a rear end nut; 170. a rear nut spacer; 180. a front end cover; 190. an end face key; 200. a lock nut; 210. a screw; 220. cylindrical roller bearings.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The present invention provides a clamping structure, referring to fig. 1 to 3, for clamping a part to be machined 10, the clamping structure comprising: a clamping portion 20, at least part of the clamping portion 20 being arranged in the inner bore 11 of the component 10 to be machined and being arranged movably in a radial direction of the inner bore 11; the driving assembly 30 is in driving connection with the clamping portion 20, and the driving assembly 30 is used for driving at least part of the clamping portion 20 to move along the radial direction of the inner hole 11 by a preset distance so that at least part of the clamping portion 20 is attached to the wall of the inner hole 11.
The clamping structure of the present invention can stably mount the part to be machined 10 to a preset mechanism by the clamping portion 20 and the driving assembly 30. In a specific clamping process, the clamping portion 20 is used for being connected with a preset mechanism, at least part of the clamping portion 20 is used for being arranged in the inner hole 11 of the component 10 to be processed, the first end of the driving assembly 30 is in driving connection with the clamping portion 20, and at least part of the clamping portion 20 is driven to move along the radial direction of the inner hole 11 through the driving assembly 30 until at least part of the clamping portion 20 is attached to the wall of the inner hole 11, so that the component 10 to be processed is clamped on the clamping portion 20 stably. The clamping structure of the invention has the advantages that the clamping part 20 is internally clamped, so that secondary clamping is not needed in the processing process, the processing time is shortened, and the problem that the clamping of the part to be processed in the prior art is time-consuming is solved.
In this embodiment, since the clamping portion 20 is internally clamped, the entire length range of the clamped part to be machined 10 is still in a space other than the clamping structure, and thus the entire length range of the part to be machined 10 can be machined. Compared with a clamping mode that two ends are required to be respectively machined and two ends are required to be clamped and repositioned, the clamping structure provided by the invention avoids the problem of machining precision reduction caused by the two-time clamping, so that the machining precision and the machining effect are better.
In order to be able to drive the movement of at least part of the clamping portion 20 in the radial direction of the inner bore 11 by means of the drive assembly 30, as shown in fig. 2, a first through hole 21 is provided in the clamping portion 20, at least part of the drive assembly 30 being provided in the first through hole 21 and being movably provided in the extension direction of the first through hole 21 for driving the movement of at least part of the clamping portion 20 in the radial direction of the inner bore 11.
In the present embodiment, when the driving assembly 30 moves in the extending direction of the first penetration hole 21, the driving assembly 30 drives at least part of the clamping portion 20 to move in the radial direction of the inner hole 11, thereby achieving the internal support of the part to be machined 10, thereby completing the internal clamping of the part to be machined 10.
In order to ensure that the clamping portion 20 moves at least partially in the radial direction of the inner bore 11, the clamping portion 20 is an elastic member, and an opening gap 22 is provided on the clamping portion 20, and the opening gap 22 communicates with the first through hole 21, so that when the driving assembly 30 moves in the extending direction of the first through hole 21, at least part of the clamping portion 20 elastically deforms in the radial direction of the inner bore 11.
In this embodiment, the clamping portion 20 is configured as an elastic member, and the opening gap 22 is provided on the clamping portion 20, so that when the driving assembly 30 moves along the extending direction of the first through hole 21, the driving assembly 30 will expand the clamping portion 20 outwards, so that at least part of the clamping portion 20 will elastically deform along the radial direction of the inner hole 11, that is, at least part of the opening gap 22 will expand.
Preferably, the plurality of opening gaps 22 are provided, and the plurality of opening gaps 22 are provided at intervals in the circumferential direction of the clamping portion 20.
Preferably, the opening gap 22 comprises a first gap section, and the clamping portion 20 comprises: the clamp body 23, the clamp body 23 is used for being arranged in the inner hole 11, and the first gap section is arranged on the clamp body 23; wherein the clamping sections between two adjacent first gap sections are arranged movably in the radial direction of the inner bore 11.
In this embodiment, the fixture body 23 is provided with a plurality of first gap segments, that is, the fixture body 23 can be moved outwardly by the driving assembly 30.
Preferably, the first gap section extends in the extending direction of the clamp body 23 to divide the clamp body 23 into a plurality of clamp sections that are movably disposed in synchronization in the radial direction of the inner bore 11.
In this embodiment, the clamping body 23 is composed of a plurality of clamping sections, that is, two adjacent clamping sections each have a first gap section therebetween, and each clamping section is moved outwardly under the driving of the driving assembly 30.
In order to stably limit the part to be processed 10, as shown in fig. 2, the clamp body 23 is a cylinder, the inner hole 11 is a round hole, an annular protrusion 231 is arranged on the circumferential outer surface of the clamp body 23, and the annular protrusion 231 is used for limiting contact with the wall of the inner hole 11.
In this embodiment, at least two annular protrusions 231 are disposed on the circumferential outer surface of the clamp body 23, that is, the positions of the clamp body 23 near the two end surfaces are all provided with annular protrusions 231, and when the clamp body 23 moves outwards, it can be ensured that the two annular protrusions 231 are in limiting contact with the wall of the inner hole 11.
Preferably, the opening gap 22 includes a second gap section, the first gap section and the second gap section being in communication, the clamping portion 20 further comprising: the first end of the switching section 24 is connected with the clamp body 23, and the second end of the switching section 24 is used for being connected with a preset mechanism; the second gap section is disposed on the adapting section 24, the second gap is a groove, and a part of the adapting section body of the adapting section 24 is movably disposed along the radial direction of the inner hole 11.
In this embodiment, the second gap includes a groove bottom and two side walls provided at both ends of the groove bottom, and a U-shaped groove is formed between the two side walls and the groove bottom.
In this embodiment, the clamping portion 20 is composed of a clamping body 23 and a adapting section 24, wherein the adapting section 24 is a supporting body, and the clamping portion 20 is a deformed body, and since the second gap section is disposed on the adapting section 24, that is, part of the adapting section 24 is also a deformed body, under the action of the driving assembly 30, the clamping body 23 and part of the adapting section 24 are rotationally deformed around the connection root thereof, so as to realize stable limiting of the component 10 to be processed.
Preferably, the clamping portion 20 is made of 65Mn material.
In the embodiment, the clamping part 20 is made of 65Mn material into an inner conical hollow structure, the hardness of the clamping part after heat treatment reaches HRC48-55, the clamping part has good flexibility and plasticity, and the clamping part after heat treatment is cut into six equal parts by adopting a wire to ensure that the stress of a workpiece is uniform.
For the specific structure of the driving assembly 30, as shown in fig. 2, the driving assembly 30 includes: the inner supporting part 31, the inner supporting part 31 comprises a conical body 311, and the conical body 311 is arranged in the first penetrating hole 21; the first end of the pull rod portion 32 is connected with one end of the inner support portion 31 away from the conical body 311, and the second end of the pull rod portion 32 is used for being connected with a preset power mechanism, so that when the preset power mechanism drives the inner support portion 31 to move along the extending direction of the first penetrating hole 21 through the pull rod portion 32, the conical body 311 drives at least part of the clamping portion 20 to move along the radial direction of the inner hole 11.
In this embodiment, the driving assembly 30 is composed of an inner supporting portion 31 and a pull rod portion 32, wherein the preset power mechanism drives the pull rod portion 32 to move, so that the pull rod portion 32 drives the inner supporting portion 31 to move, and the cone 311 drives at least part of the clamping portion 20 to move along the radial direction of the inner hole 11.
Preferably, the first through-hole 21 comprises a tapered hole section 211, and the cone 311 is movably arranged in the tapered hole section 211, the shrinkage direction of the tapered hole section 211 being consistent with the shrinkage direction of the cone 311.
In this embodiment, the shrinkage direction of the tapered bore section 211 is relative to the structure of the tapered bore section 211 itself, regardless of the particular deformation or movement direction, and accordingly, the shrinkage direction of the cone 311 is relative to the structure of the cone 311 itself.
Preferably, the plurality of opening gaps 22 are uniformly distributed in the circumferential direction of the clamping portion 20.
In the present embodiment, by uniformly distributing the plurality of opening gaps 22 in the circumferential direction of the clamping portion 20, that is, the included angles between two adjacent opening gaps 22 in one circumferential direction are equal. At this time, the spreading angles of the clamping sections in all directions are consistent after the clamping sections are spread, so that the centering and the uniform stress of the part to be processed 10 are ensured.
In order to be able to arrange the clamping structure on the preset mechanism, as shown in fig. 2, the clamping structure further comprises: the first end of the mandrel 40 is used for being connected with a preset mechanism, and the second end of the mandrel 40 is connected with the clamping part 20, so that the clamping part 20 is connected with the preset mechanism through the mandrel 40; the driving assembly 30 is connected to a preset power mechanism after passing through the mandrel 40, and the driving assembly 30 is movably disposed along the axial direction of the mandrel 40.
In the present embodiment, by providing the spindle 40, the clamping portion 20 can be position-defined by the spindle 40, and the clamping structure can also be provided on the preset mechanism.
In order to be able to ensure a normal movement of the drive assembly 30 relative to the spindle 40, as shown in fig. 2, the clamping structure further comprises: the disc spring set 50 is sleeved on the driving assembly 30, a first end of the disc spring set 50 is abutted against the mandrel 40, and a second end of the disc spring set 50 is abutted against the driving assembly 30.
In this embodiment, by providing the disc spring set 50 on the driving assembly 30, when the driving assembly 30 moves, even if a position shift occurs, the driving assembly 30 can be guaranteed to return or still move normally under the elastic force of the disc spring set 50.
In this embodiment, the disc spring set 50 is sleeved on the pull rod portion 32.
In this embodiment, the disc spring assembly 50 is made up of a plurality of disc springs, wherein a single disc spring is only 2.0mm thick and is shaped like a disc-shaped resilient pad with the bottom of the disc removed.
In this embodiment, two adjacent disc springs adopt: the two positive and two negative overlapping modes ensure that the disc spring set 50 has enough strength and can also ensure elasticity in the axial direction.
Preferably, the preset mechanism includes a rotation driving part and a fixing part, and the clamping structure further includes: the shaft sleeve 60, the shaft sleeve 60 is connected with the fixed part, the mandrel 40 passes through the shaft sleeve 60 and then is connected with the clamping part 20, and the shaft sleeve 60 and the part 10 to be processed are arranged at intervals; the rotation driving part is in driving connection with the mandrel 40 to drive the mandrel 40 to rotate relative to the shaft sleeve 60.
In this embodiment, the clamping structure is fixed on the fixing portion through the shaft sleeve 60, and the rotation driving portion can drive the mandrel 40 to rotate, so that the part to be machined 10 is driven to rotate through the clamping portion 20.
In this embodiment, a plurality of angular ball bearings 70 are disposed between the spindle 40 and the sleeve 60, so as to ensure that the spindle 40 rotates normally relative to the sleeve 60.
In this embodiment, the number of angular ball bearings 70 is at least 3, wherein two angular ball bearings 70 are sequentially arranged, one is arranged at intervals from the other, a front inner spacer ring 80 is arranged between the inner rings of the two angular ball bearings 70 arranged at intervals, and a front outer spacer ring 90 is arranged between the outer rings of the two angular ball bearings 70 arranged at intervals.
In the present embodiment, the lock nut 200 is disposed on the spindle 40, and the front inner spacer 100 is disposed between the lock nut 200 and the angular ball bearing 70.
In this embodiment, the spindle 40 is secured for rotation concentric with the sleeve 60 by the three sets of angular ball bearings 70 and the set of cylindrical roller bearings 220. The end of the spindle 40 is provided with external threads that are coupled with internal threads of the back end nut 160. The back end nut 160 may be used to limit the back flange 120, and the back flange 120 is fixed to the sleeve 60. The sleeve 60 is connected to the external structure of the machine tool. With the above structure, the spindle 40 can perform rotational movement and cannot perform radial movement.
In the present embodiment, a rear nut spacer 170 is disposed between the rear end nut 160 and the cylindrical roller bearing 220, and a first spacer 130 and a second spacer 140 are sequentially disposed between the cylindrical roller bearing 220 and the mandrel 40.
In the present embodiment, the spindle 40 and the rotation driving part are connected by a word coupling 150, and the word coupling 150 and the spindle 40 are connected by a screw 210.
In this embodiment, the front end cap 180 is disposed on a side of the sleeve 60 facing away from the rear flange 120.
In this embodiment, end key 190 is used to connect spindle 40 with clamping portion 20.
In this embodiment, the clamping portion 20 is a part actually contacted with the component 10 to be processed in use, the interior of the clamping portion 20 is tapered to form fit with the outer tapered surface of the driving assembly 30, and the clamping and releasing of the component 10 to be processed is achieved by controlling the movement of the driving assembly 30. When the driving assembly 30 moves in a direction of pressing the clamping portion 20 outward, the six-piece structure of the clamping portion 20 is spread apart and the component 10 to be machined is clamped. Conversely, the six-piece structure springs back and the part to be machined 10 is released.
In this embodiment, the driving assembly 30 is composed of an inner supporting portion 31 and a pull rod portion 32, wherein the inner supporting portion 31 is provided with an internal thread at one end which is not matched with the clamping portion 20, one end of the pull rod portion 32 is provided with an external thread, and the pull rod portion 32 is controlled by a disc spring set in the spindle 40 to realize movement in the spindle axial direction. When the pull rod portion 32 moves in the axial direction of the spindle, the inner support portion 31 is pulled to move therewith, and the clamping portion 20 tightens or loosens the member to be machined 10 by the inner support portion 31.
In this embodiment, the clamping portion 20 is secured to the spindle 40 of the spindle during use. In this way, the part to be machined 10 can be rotated together with the mandrel after clamping. Because the two end surfaces and the whole excircle of the cylinder part (the part to be processed 10) are outside the clamp, the end surface turning, chamfering and the whole-length excircle turning processing of the two ends can be realized, and the processing form can be selected according to the process requirement by using the clamp of the design.
The invention also provides a machine tool, which comprises a clamping structure and a preset mechanism, wherein the clamping structure is arranged on the preset mechanism, and the clamping structure is the clamping structure.
In this embodiment, the machine tool may be a lathe or a grinder.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the clamping structure of the present invention can stably mount the part to be machined 10 to a preset mechanism by the clamping portion 20 and the driving assembly 30. In a specific clamping process, the clamping portion 20 is used for being connected with a preset mechanism, at least part of the clamping portion 20 is used for being arranged in the inner hole 11 of the component 10 to be processed, the first end of the driving assembly 30 is in driving connection with the clamping portion 20, and at least part of the clamping portion 20 is driven to move along the radial direction of the inner hole 11 through the driving assembly 30 until at least part of the clamping portion 20 is attached to the wall of the inner hole 11, so that the component 10 to be processed is clamped on the clamping portion 20 stably. The clamping structure of the invention has the advantages that the clamping part 20 is internally clamped, so that secondary clamping is not needed in the processing process, the processing time is shortened, and the problem that the clamping of the part to be processed in the prior art is time-consuming is solved.
The clamping structure of the invention is a clamp which uses an internal bracing mode to clamp a barrel part (a part to be processed 10) so as to meet the requirement of one-time processing of the whole length of the part. By using the segmented clamp structure (the clamping part 20), the full-length excircle turning, end face turning and chamfering processing of the part can be realized after the part is clamped. If both end surfaces of the part are required to be turned and chamfered, the machining can still be finished through one-time clamping by the design. The clamp is improved to simplify the working procedure and improve the production efficiency. The clamping mode of the clamp to the barrel part is simple and quick, and is particularly suitable for high-frequency automatic processing occasions.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. Clamping structure for clamping a component (10) to be machined, characterized in that it comprises:
the clamping part (20) comprises a clamping body (23) and an adapter section (24), wherein the clamping body (23) is used for being arranged in an inner hole (11) of a part (10) to be processed; the first end of the switching section (24) is connected with the clamp body (23), and the second end of the switching section (24) is used for being connected with a preset mechanism;
the driving assembly (30), the driving assembly (30) is in driving connection with the clamping part (20), a first penetrating hole (21) is formed in the clamping part (20), at least part of the driving assembly (30) is arranged in the first penetrating hole (21) and is movably arranged along the extending direction of the first penetrating hole (21), so that at least part of the clamping part (20) is driven to move for a preset distance along the radial direction of the inner hole (11), and at least part of the clamping part (20) is attached to the wall of the inner hole (11);
an opening gap (22) is arranged on the clamping part (20), the opening gap (22) comprises a first gap section and a second gap section, and the first gap section is communicated with the second gap section; the first gap section is arranged on the clamp body (23); the clamping sections between two adjacent first gap sections are movably arranged along the radial direction of the inner hole (11); the first gap section extends along the extending direction of the clamp body (23) so as to divide the clamp body (23) into a plurality of clamping sections, and the plurality of clamping sections are synchronously and movably arranged along the radial direction of the inner hole (11);
the second gap section is arranged on the switching section (24), the second gap section is a groove, and a part of switching section bodies of the switching section (24) are movably arranged along the radial direction of the inner hole (11).
2. The clamping structure according to claim 1, characterized in that the clamping portion (20) is an elastic member, and the opening gap (22) communicates with the first through hole (21) so that at least part of the clamping portion (20) is elastically deformed in a radial direction of the inner hole (11) when the driving assembly (30) moves in an extending direction of the first through hole (21).
3. The clamping structure according to claim 2, wherein the plurality of opening gaps (22) are provided, the plurality of opening gaps (22) being provided at intervals along the circumferential direction of the clamping portion (20).
4. A clamping structure according to claim 3, wherein the clamp body (23) is a cylinder, the inner hole (11) is a round hole, an annular protrusion (231) is arranged on the circumferential outer surface of the clamp body (23), and the annular protrusion (231) is used for limiting contact with the wall of the inner hole (11).
5. The clamping structure according to any of claims 2 to 4, characterized in that the clamping portion (20) is made of 65Mn material.
6. The clamping structure according to any one of claims 1 to 4, characterized in that the drive assembly (30) comprises:
an inner support portion (31), wherein the inner support portion (31) comprises a conical body (311), and the conical body (311) is arranged in the first penetrating hole (21);
the first end of the pull rod part (32) is connected with one end of the inner support part (31) away from the conical body (311), and the second end of the pull rod part (32) is used for being connected with a preset power mechanism, so that when the preset power mechanism drives the inner support part (31) to move along the extending direction of the first penetrating hole (21) through the pull rod part (32), the conical body (311) drives at least part of the clamping part (20) to move along the radial direction of the inner hole (11).
7. The clamping structure according to claim 6, characterized in that the first through-going hole (21) comprises a conical hole section (211), the cone (311) being movably arranged in the conical hole section (211), the direction of contraction of the conical hole section (211) coinciding with the direction of contraction of the cone (311).
8. A clamping structure according to claim 3, characterized in that a plurality of said opening gaps (22) are evenly distributed along the circumferential direction of said clamping portion (20).
9. The clamping structure of claim 1, further comprising:
the first end of the mandrel (40) is used for being connected with a preset mechanism, and the second end of the mandrel (40) is connected with the clamping part (20) so that the clamping part (20) is connected with the preset mechanism through the mandrel (40);
the driving assembly (30) is connected with a preset power mechanism after passing through the mandrel (40), and the driving assembly (30) is movably arranged along the axial direction of the mandrel (40).
10. The clamping structure of claim 9, further comprising:
the disc spring set (50) is sleeved on the driving assembly (30), the first end of the disc spring set (50) is abutted to the mandrel (40), and the second end of the disc spring set (50) is abutted to the driving assembly (30).
11. The clamping structure of claim 9, wherein the preset mechanism includes a rotary drive portion and a fixed portion, the clamping structure further comprising:
the shaft sleeve (60) is connected with the fixing part, the mandrel (40) penetrates through the shaft sleeve (60) and then is connected with the clamping part (20), and the shaft sleeve (60) and the part (10) to be processed are arranged at intervals;
the rotary driving part is in driving connection with the mandrel (40) so as to drive the mandrel (40) to rotate relative to the shaft sleeve (60).
12. A machine tool comprising a clamping structure and a preset mechanism, the clamping structure being provided on the preset mechanism, characterized in that the clamping structure is the clamping structure of any one of claims 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555262.9A CN109482924B (en) | 2018-12-18 | 2018-12-18 | Clamping structure and machine tool with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811555262.9A CN109482924B (en) | 2018-12-18 | 2018-12-18 | Clamping structure and machine tool with same |
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| CN109482924A CN109482924A (en) | 2019-03-19 |
| CN109482924B true CN109482924B (en) | 2024-03-08 |
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| CN201811555262.9A Active CN109482924B (en) | 2018-12-18 | 2018-12-18 | Clamping structure and machine tool with same |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666686A (en) * | 2019-11-11 | 2020-01-10 | 安阳德一机床附件制造有限公司 | Tensioning mechanism of rear-pull main shaft |
| CN113977475B (en) * | 2021-09-30 | 2023-03-24 | 丹阳市剑庐工具有限公司 | Quick locking device and locking method for accessory tool |
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| Publication number | Publication date |
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| CN109482924A (en) | 2019-03-19 |
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