阅读说明：本技术 环类零件的夹持装置 (Clamping device for ring-shaped parts ) 是由 李治闯 李晨 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种环类零件的夹持装置,涨芯组件的至少一部分位于通孔中,导向组件环绕在涨芯组件的周围,涨芯组件与压块通过锥面配合,弹簧沿着压块的周向布置并与压块配合使压块与涨芯组件的配合获得保持,所述第一弹性支撑机构位于通孔中,第一弹性支撑机构的一端与基座配合,第一弹性支撑机构的另一端与导向组件的一端配合,第二弹性支撑机构与涨芯组件配合后使该第二弹性支撑机构的一端与基座配合并蓄积弹性势能,第二弹性支撑机构的另一端与定位部件连接,定位部件套在基座的外周面上,定位部件与基座通过锥面配合,限位环环绕在定位部件的周围。本发明可防止被夹持的环类零件变形。(The invention discloses a clamping device for ring parts, at least one part of an expanding core component is positioned in a through hole, the guide assembly surrounds the core expanding assembly, the core expanding assembly is matched with the pressing block through a conical surface, the spring is arranged along the circumferential direction of the pressing block and is matched with the pressing block to keep the matching of the pressing block and the core expanding assembly, the first elastic supporting mechanism is positioned in the through hole, one end of the first elastic supporting mechanism is matched with the base, the other end of the first elastic supporting mechanism is matched with one end of the guide assembly, one end of the second elastic supporting mechanism is matched with the base and accumulates elastic potential energy after the second elastic supporting mechanism is matched with the expansion core assembly, the other end of the second elastic supporting mechanism is connected with the positioning part, the positioning part is sleeved on the outer peripheral surface of the base, the positioning part is matched with the base through a conical surface, and the limiting ring is surrounded on the periphery of the positioning part. The invention can prevent the deformation of the clamped ring parts.)

1. The clamping device for the ring-shaped parts comprises a limiting ring (2) and is characterized by further comprising an expanding core assembly, a base (4), a guide assembly, a pressing block (5), a spring (6), a first elastic supporting mechanism, a second elastic supporting mechanism and a positioning component (7) for forming radial positioning on the ring-shaped parts (A), wherein a through hole is formed in the base (4), one part of the guide assembly is positioned in the through hole, a radial sliding groove (10a) is formed in the guide assembly, the pressing block (5) is matched with the sliding groove in the guide assembly, at least one part of the expanding core assembly is positioned in the through hole, the guide assembly surrounds the expanding core assembly, the expanding core assembly is matched with the pressing block (5) through a conical surface, the spring (6) is arranged along the circumferential direction of the pressing block (5) and is matched with the pressing block (5) to keep the matching of the pressing block (5) and the expanding core assembly, the first elastic supporting mechanism is positioned in the through hole, one end of the first elastic supporting mechanism is matched with the base (4), the other end of the first elastic supporting mechanism is matched with one end of the guide assembly, one end of the second elastic supporting mechanism is matched with the base (4) and accumulates elastic potential energy after the second elastic supporting mechanism is matched with the expansion core assembly, the other end of the second elastic supporting mechanism is connected with the positioning component (7), the positioning component (7) is sleeved on the outer peripheral surface of the base (4), the positioning component (7) is matched with the base (4) through a conical surface, and the limiting ring (2) surrounds the positioning component (7).

2. A ring part holder according to claim 1, wherein the core expanding assembly comprises an expanding core (3) and a connecting seat (8), a first tapered surface (3a) for driving the pressing block (5) to move radially along the guiding assembly is provided on the circumferential surface of the expanding core (3), a first flat surface (3b) for driving the pressing block (5) to move axially along the guiding assembly is provided on one end of the expanding core (3), the connecting seat (8) is connected to the other end of the expanding core (3), and the connecting seat (8) is engaged with the second elastic supporting mechanism.

3. A ring holder according to claim 2, wherein the connecting base (8) is provided with a shoulder (8a) on the periphery thereof, the shoulder (8a) cooperating with the second resilient support means to urge the second resilient support means against the base (4).

4. A ring-like member holding apparatus according to claim 1, wherein a partition plate (4a) for dividing the through-hole into a first hole (4b) and a second hole (4c) is provided in the through-hole of the base (4), a third hole (4d) and a fourth hole (4e) are provided in the partition plate (4a), the diameter of the third hole (4d) is smaller than the diameter of the first hole (4b) and the second hole (4c), the third hole (4d) communicates with the first hole (4b) and the second hole (4c), a part of the guide assembly is located in the first hole (4b), a part of the first elastic support mechanism is located in the second hole (4c), and another part of the first elastic support mechanism passes through the fourth hole (4e) to be engaged with the guide assembly.

5. A ring-like part holding apparatus according to claim 1, wherein the guide member comprises a lower guide base (10), said fitting groove (10a) is provided on the lower guide base (10), and the lower guide base (10) is provided with a first through-hole (10b) through which the expansion core member passes.

6. The ring part clamping device according to claim 5, wherein the guide assembly further comprises an upper guide seat (11), a yielding notch (11a) matched with the pressing block (5) is formed in the peripheral surface of the upper guide seat (11), a second through hole (11b) for the expansion core assembly to pass through is formed in the upper guide seat (11), and after the upper guide seat (11) and the lower guide seat (10) are fixed, the yielding notch (11a) corresponds to the sliding fit groove (10 a).

7. A clamping device for ring-like parts according to claim 1, characterized in that said first elastic supporting means comprises a first spring (12), a first press ring (13) and a first guide post (14), one end of the first spring (12) is engaged with the base (4), the other end of the first spring (12) is engaged with the first press ring (13), the first press ring (13) is fixed with one end of the first guide post (14), and the other end of the first guide post (14) is fixed with one end of the guide assembly.

8. A ring-like part holding apparatus according to claim 1, wherein the second elastic supporting means comprises a second spring (15) and a pull ring (16), the pull ring (16) is provided with a fitting hole (16a), one end of the second spring (15) is located in the fitting hole (16a) and abuts against the pull ring (16), the pull ring (16) is provided with a step (16b), the other end of the second spring (15) abuts against the base (4) after the step (16b) is engaged with the core expansion assembly, and the pull ring (16) is fixedly connected with the positioning member (7).

9. The ring-like part holding apparatus according to claim 1, wherein the positioning member (7) comprises a connecting seat (7a), a plurality of positioning lobes (7b), the plurality of positioning lobes (7b) being arranged at intervals along the same circumferential direction, one end of each positioning lobe (7b) being connected to the connecting seat (7a), the other end of each positioning lobe (7b) being a free end, a part of the inner surface of the positioning lobe (7b) being a tapered surface, and a part of the outer peripheral surface of the base (4) being a tapered surface.

10. A holding device of ring-like parts according to any one of claims 1 to 9, after the core expansion assembly moves along the axial direction of the base (4), the core expansion assembly enables the pressing block (5) to move radially through the conical surface matched with the pressing block (5) and gradually form corresponding with the ring part (A), meanwhile, the elastic potential energy of the second elastic supporting mechanism is released along with the movement of the core expansion assembly, the elastic potential energy released by the second elastic supporting mechanism acts on the positioning part (7), the positioning part (7) moves axially along the base (4), the positioning part (7) and the base (4) are radially expanded through the part matched with the conical surface to position the ring part (A), and finally the core expansion assembly enables the pressing block (5) to axially move along with the continuous axial movement of the core expansion assembly, and the ring part (A) is tightly pressed between the pressing block (5) and the limiting ring (2).

Technical Field

The invention relates to the technical field of machining, in particular to a clamping device for ring parts.

Background

The previous company adopts an internal expansion type clamp (figure 1) for milling and chamfering gasket type combined teeth, the clamp comprises a tension sleeve 1, a limiting ring 2 and an expansion core 3, the tension sleeve 1 comprises a base 1a and a plurality of tension petals 1b matched with the gasket type combined teeth A, the tension petals 1b are circumferentially arranged at intervals, one end of each tension petal 1b is fixed with the base 1a, the other end of each tension petal 1b is a free end, the limiting ring 2 surrounds the periphery of the tension sleeve 1, when the clamp is used, the gasket type combined teeth A are sleeved in the position of the tension sleeve 1 corresponding to the tension petals 1b in an empty mode, the gasket type combined teeth A are matched with the axial end faces of the limiting ring 2, the expansion core 3 is inserted into an inner sleeve of the tension sleeve 1, the conical face of the expansion core 3 is matched with the conical face of the tension petal 1b, radial acting force is generated on the tension petals 1b, and the tension petals 1b are opened by the expansion core 3, and the tensioning valve 1b generates tensioning acting force on the gasket type combination teeth A.

The clamp achieves the purpose of clamping a workpiece by applying a certain force to the inner diameter of the product from inside to outside along the radial direction, but the thickness of the gasket type combination tooth A is small, the rigidity of the gasket type combination tooth A is limited, and the tensioning force of the clamp exceeds the rigidity of the clamp, so that the diameter of the gasket type combination tooth A is increased, the inner diameter is increased by 0.01-0.018mm, the increased amount accounts for about 34% of a tolerance zone, the variable amount greatly exceeds the tolerance requirement on a drawing, and the product is directly scrapped during clamping. Therefore, the clamp for clamping by tensioning is not suitable for parts with small thickness, such as the gasket type combination tooth A.

The invention is suitable for the processing clamp of the round single-piece combined tooth, and the dimensional tolerance requirement after enlargement is caused by the influence of radial clamping force in the use process of the traditional internal expanding clamp; the invention solves the problem of radial deformation of a thin-wall part product in the machining process by adjusting the direction of the clamping force.

Disclosure of Invention

The invention aims to provide a clamping device for a ring part, which can prevent the clamped ring part from deforming.

The clamping device for the ring parts comprises a limiting ring, an expansion core assembly, a base, a guide assembly, a pressing block, a spring, a first elastic supporting mechanism, a second elastic supporting mechanism and a positioning component for forming radial positioning on the ring parts, wherein a through hole is formed in the base, one part of the guide assembly is positioned in the through hole, a radial sliding fit groove is formed in the guide assembly, the pressing block is matched with the sliding fit groove in the guide assembly, at least one part of the expansion core assembly is positioned in the through hole, the guide assembly surrounds the periphery of the expansion core assembly, the expansion core assembly is matched with the pressing block through a conical surface, the spring is arranged along the circumferential direction of the pressing block and is matched with the pressing block to enable the pressing block to be matched with the expansion core assembly to be kept, the first elastic supporting mechanism is positioned in the through hole, one end of the first elastic supporting mechanism is matched with the base, and the other end of the first elastic supporting mechanism is matched with one end of the guide assembly, after the second elastic supporting mechanism is matched with the expansion core assembly, one end of the second elastic supporting mechanism is matched with the base and accumulates elastic potential energy, the other end of the second elastic supporting mechanism is connected with the positioning part, the positioning part is sleeved on the outer peripheral surface of the base, the positioning part is matched with the base through a conical surface, and the limiting ring is surrounded on the periphery of the positioning part.

When the core expanding assembly moves axially, the positioning part not only has the function of radial positioning on the ring part, but also clamps the ring part between the pressing block and the limiting ring, and the clamping acting force is mainly supported by the pressing block and the limiting ring to form the clamping acting force in the axial direction, so that the problem of deformation of the ring part caused by the radial tensioning force of the traditional clamp is solved. The invention only applies axial acting force to the expansion core assembly, simultaneously realizes the end face clamping and the radial positioning, and has the advantages of simple use and part deformation prevention. The invention is not only suitable for processing the ring parts with small thickness, but also suitable for processing the ring parts with large thickness, and mainly prevents the radial deformation of the parts for clamping when the ring parts with small thickness are processed.

Drawings

FIG. 1 is a schematic view of a prior art fixture for tensioning thin-walled coupling teeth;

FIG. 2 is a perspective view of the clamping device of the present invention;

FIG. 3 is a cross-sectional view of the clamping device of the present invention;

FIG. 4 is a schematic view of a base;

FIG. 5 is a schematic view of a briquette;

FIG. 6 is a schematic view of a lower guide shoe;

FIG. 7 is a schematic view of an upper shoe;

FIG. 8 is a schematic view of a positioning member;

reference numbers in the drawings:

the ring-shaped part A, a tension sleeve 1, a base 1a, a tension flap 1b, a limiting ring 2, an expansion core 3, a first conical surface 3a, a first plane 3b, a base 4, a partition plate 4a, a first hole 4b, a second hole 4c, a third hole 4d, an extension seat 4f, a large-diameter hole 4g, a limiting surface 4h, a pressing block 5, a second conical surface 5a, a groove 5b, a spring 6, a positioning part 7, a connecting seat 7a, a positioning flap 7b, a connecting seat 8, a shoulder 8a, a screw 9, a lower guide seat 10, a sliding fit groove 10a, a first through hole 10b, a slot 10c, an upper guide seat 11, a abdicating notch 11a, a second through hole 11b, an extension part 11c, a first spring 12, a first press ring 13, a first guide pillar 14, a second spring 15, a mounting hole 16a and a step 16 b.

Detailed Description

The clamping device for the ring-like parts of the embodiment comprises a limiting ring 2, an expanding core assembly, a base 4, a guide assembly, a pressing block 5, a spring 6, a first elastic supporting mechanism, a second elastic supporting mechanism and a positioning component 7 for forming radial positioning on the ring-like parts a, and the following description is respectively given on each part and the previous relation of each part:

the base 4 is provided with a through hole, one part of the guide assembly is positioned in the through hole, the through hole on the base 4 is internally provided with a partition plate 4a which divides the through hole into a first hole 4b and a second hole 4c, the partition plate 4a is provided with a third hole 4d and a fourth hole 4e, the aperture of the third hole 4d is small in diameter, the aperture of the first hole 4b is small in diameter, the aperture of the second hole 4c is small in diameter, the third hole 4d is communicated with the first hole 4b and the second hole 4c, one part of the guide assembly is positioned in the first hole 4b, one part of the first elastic supporting mechanism is positioned in the second hole 4c, and the other part of the first elastic supporting mechanism penetrates through the fourth hole 4e to be matched with the guide assembly.

One end of the base 4 is provided with an extension seat 4f, a large-diameter hole 4g is formed in the extension seat 4f, the inner diameter of the large-diameter hole 4g is larger than that of the second hole 4c, a limiting surface 4h is formed between the large-diameter hole 4g and the second hole 4c, and the large-diameter hole 4g and the limiting surface 4h are used for being matched with the second elastic supporting mechanism.

The guide assembly is provided with a radial sliding fit groove 10a, the guide assembly comprises a lower guide seat 10, the sliding fit groove 10a is arranged on the lower guide seat 10, and the lower guide seat 10 is provided with a first through hole 10b for the expansion core assembly to pass through. The guide assembly further comprises an upper guide seat 11, a yielding notch 11a matched with the pressing block 5 is formed in the circumferential surface of the upper guide seat 11, a second through hole 11b for the expansion core assembly to penetrate through is formed in the upper guide seat 11, and after the upper guide seat 11 and the lower guide seat 10 are fixed, the yielding notch 11a corresponds to the sliding fit groove 10 a. An extension part 11c is arranged at one end of the upper guide seat 11, a slot 10c is arranged on the circumferential surface of the lower guide seat 10, and the lower guide seat 10 and the extension part 11c are fixed by adopting a screw, rivet or welding mode after the extension part 11c is inserted into the slot 10 c.

The pressing block 5 is matched with the sliding fit groove 10a on the guide assembly, the pressing block 5 can move along the sliding fit groove 10a under the action of external force, the pressing block 5 applies axial pressure to the ring part A, one end of the ring part A is supported on the axial end face of the limiting ring 2, the pressing block 5 applies axial pressure to the other end of the ring part A, and therefore the ring part A is clamped between the pressing block 5 and the limiting ring 2. In this embodiment, the pressing block 5 is moved radially along the sliding groove 10a, and after the pressing block 5 is moved to a position corresponding to the ring part a, the pressing block 5 is moved axially, so that the pressing block 5 applies an axial pressure to the ring part a.

The radial and axial movement of the press block 5 is realized by an expansion core assembly, at least one part of the expansion core assembly is positioned in the through hole, the guide assembly surrounds the expansion core assembly, namely the lower guide seat 10 and the upper guide seat 11 surround the expansion core assembly, and the expansion core assembly is matched with the press block 5 through a conical surface.

Preferably, the core subassembly that rises includes core 3, connecting seat 8 rises, is equipped with on the global of core 3 that rises and drives briquetting 5 along the first conical surface 3a of guide assembly radial movement, and the one end of core 3 that rises is equipped with and drives briquetting 5 along the first plane 3b of guide assembly axial displacement, and first plane 3b is connected with first conical surface 3 a.

Briquetting 5 needs to be retrained in radial direction, otherwise, briquetting 5 will can't keep the cooperation relation with the core subassembly that rises, and in this embodiment, spring 6 arranges and makes briquetting 5 and the cooperation of the core subassembly that rises obtain keeping along the circumference of briquetting 5 and with the cooperation of briquetting 5. Preferably, a groove 5b is formed in the pressing block 5, the number of the pressing blocks 5 is at least two, in the embodiment, three pressing blocks 5 are preferably adopted, the spring 6 is a ring-shaped spring, the spring 6 is embedded into the groove 5b, and the pressing block 5 is radially constrained by the acting force of the spring 6, so that the cooperation between the pressing block 5 and the expansion core assembly is maintained.

The connecting seat 8 is connected with the other end of the expansion core 3, and the connecting seat 8 is matched with the second elastic supporting mechanism. The pressing block 5 is provided with a second conical surface 5a, the second conical surface 5a is matched with the first conical surface 3a, and when the expanding core 3 moves axially, the first conical surface 3a forms an extrusion acting force on the second conical surface 5a, so that the pressing block 5 moves radially along the sliding fit groove 10 a. When the first tapered surface 3a is separated from the second tapered surface 5a and then the first flat surface 3b is matched with the axial end surface of the pressing block 5, as the expansion core 3 continues to move axially, the first flat surface 3b applies an axial acting force to the pressing block 5, so that the pressing block 5 and the guide assembly move axially together.

The circumferential surface of the connecting seat 8 is provided with a shoulder 8a, and the shoulder 8a is matched with the second elastic supporting mechanism to enable the second elastic supporting mechanism to abut against the base 4. When the core expansion assembly moves along the axial direction, the second elastic supporting mechanism is kept in abutting contact with the base 4 under the action of the shoulder part 8a and the second elastic supporting mechanism, and then the second elastic supporting mechanism forms axial tension on the positioning component 7.

The first elastic supporting mechanism is located in the through hole, one end of the first elastic supporting mechanism is matched with the base 4, the other end of the first elastic supporting mechanism is matched with one end of the guide assembly, the first elastic supporting mechanism comprises a first spring 12, a first pressing ring 13 and a first guide pillar 14, one end of the first spring 12 is matched with the base 4, the other end of the first spring 12 is matched with the first pressing ring 13, the first pressing ring 13 is fixed with one end of the first guide pillar 14, and the other end of the first guide pillar 14 is fixed with one end of the guide assembly.

And under the action of the first elastic supporting mechanism, on one hand, the guide assembly is supported, so that a space is formed between the guide assembly and the partition plate 4a, when the guide assembly moves axially, the guide assembly can move freely and axially in the space without limitation, and on the other hand, when the expansion core assembly resets, the guide assembly resets under the action of the first elastic supporting mechanism.

In the embodiment, the second elastic supporting mechanism and the positioning component 7 are fixed by a screw 9 penetrating through the base 4, the positioning component 7 is sleeved on the outer peripheral surface of the base 4, the positioning component 7 is matched with the base 4 through a conical surface, and the limiting ring 2 surrounds the positioning component 7.

The second elastic supporting mechanism is mainly used for releasing the elastic potential energy of the second elastic supporting mechanism when the expansion core assembly moves in the axial direction, the released elastic potential energy is converted into a tensile force to the positioning part 7, so that the positioning part 7 moves in the axial direction, the positioning part 7 is propped open by the base 4 when moving in the axial direction due to the fact that the positioning part 7 is matched with the base 4 through the conical surface, and finally the positioning part 7 has a radial positioning effect on the inner hole of the ring-shaped part A, and the ring-shaped part A is prevented from moving in the radial direction in the machining process.

The second elastic supporting mechanism comprises a second spring 15 and a pull ring 16, wherein an assembly hole 16a is formed in the pull ring 16, one end of the second spring 15 is located in the assembly hole 16a and abuts against the pull ring 16, a step 16b is formed in the pull ring 16, the other end of the second spring 15 abuts against the base 4 after the step 16b is matched with the expansion core assembly, the second spring 15 abuts against a limiting surface 4h on the base 4, the pull ring 16 is matched in a large-diameter hole 4g, and the pull ring 16 is fixedly connected with the positioning part 7.

Part of the connecting seat 8 is matched in a hole of the pull ring 16, so that the step 16b is matched with the shoulder 8a, the core expansion assembly drives the press block 5 to generate pressure on the ring part A, after the ring part A is machined, the core expansion assembly returns to the original position, the step 16b is pushed by the shoulder 8a in the resetting process of the core expansion assembly, the pull ring 16 moves towards the limiting surface 4h on the base 4, and the second spring 15 is propped between the limiting surface 4h and the pull ring 16, so that the second spring 15 is compressed when the pull ring 16 is reset, and the elastic potential energy accumulated by the second spring 15 is increased along with the increase of the compression amount.

After the core expansion assembly moves along the axial direction of the base 4, the core expansion assembly enables the pressing block 5 to move radially through the conical surface matched with the pressing block 5 and gradually correspond to the ring-shaped part A, meanwhile, the elastic potential energy of the second elastic supporting mechanism is released along with the movement of the core expansion assembly, the elastic potential energy released by the second elastic supporting mechanism acts on the positioning part 7, the positioning part 7 moves axially along the base 4, the part, matched with the conical surface, of the positioning part 7 and the base 4 is expanded radially to position the ring-shaped part A, and the core expansion assembly moves axially continuously and finally enables the pressing block 5 to move axially, and the ring-shaped part A is tightly pressed between the pressing block 5 and the limiting ring 2.

Preferably, the positioning member 7 includes a connecting seat 7a and a plurality of positioning lobes 7b, the plurality of positioning lobes 7b are arranged at intervals along the same circumferential direction, one end of each positioning lobe 7b is connected with the connecting seat 7a, the other end of each positioning lobe 7b is a free end, a part of the inner surface of each positioning lobe 7b is a tapered surface, and a part of the outer circumferential surface of the base 4 is a tapered surface. The connecting socket 7a and the pull ring 16 are fastened by said screw 9 passing through the base 4. When the positioning component 7 moves axially, the positioning petals 7b are spread, and the positioning petals 7b move along the radial direction, so that the positioning petals 7b are matched with the inner hole of the ring-shaped part A, the positioning petals 7b are preferably in transition fit with the inner hole of the ring-shaped part A, the positioning component 7 performs a positioning function on the ring-shaped part A through the transition fit, and meanwhile, the ring-shaped part A is prevented from deforming.

In the working process of this embodiment:

the connecting seat 8 is connected with a pull rod on a machine tool, the pull rod applies pulling force to the connecting seat 8, the expanding core 3 axially moves along with the connecting seat 8, under the matching action of a first conical surface 3a on the expanding core 3 and a second conical surface 5a on the pressing block 5, the pressing block 5 radially moves and gradually corresponds to the ring-shaped part A through the axial movement of the expanding core 3, meanwhile, due to the movement of the connecting seat 8, elastic potential energy accumulated by the second spring 15 is released, the second spring 15 pushes the pull ring 16 to axially move, the pull ring 16 drives the positioning part 7 to axially move, the positioning clacks 7b on the positioning part 7 are propped open, the positioning clacks 7b radially move, and therefore the positioning clacks 7b are matched with an inner hole of the ring-shaped part A, and the positioning part 7 has a positioning effect on the ring-shaped part A. With the continuous movement of the expansion core 3, when the first conical surface 3a is separated from the second conical surface 5a and then the first plane 3b is matched with the axial end surface of the pressing block 5, with the continuous axial movement of the expansion core 3, the first plane 3b applies an axial acting force to the pressing block 5, so that the pressing block 5 and the guide assembly move axially together, and finally the ring part a is pressed between the pressing block 5 and the limiting ring 2.