CN210209533U

CN210209533U - Internal expansion type precision turning clamp

Info

Publication number: CN210209533U
Application number: CN201921191703.1U
Authority: CN
Inventors: Xuejun Wu; 吴雪君; Huan Wang; 王欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-03-31
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses an accurate turning anchor clamps of interior expanding, including rubber ring, hexagon socket head cap holding screw, T shape sliding key, T shape pretension awl axle, central connection pad, ring flange, pull rod screw, hexagon socket head cap screw, round pin axle, split ring, flyweight, support, round pin axle are with plain washer, single cone lamella, stud, location awl axle, threaded disc and disc. The utility model has the advantages that: the positioning conical shaft, the connecting disc, the T-shaped pre-tightening conical shaft and the six single conical lobes ensure the stability and the connection feasibility of the conical lobes, so that the structure of the whole clamp is more perfect, the centrifugal clamping device of the clamp is formed by the flyweight, the disc, the positioning conical shaft and the single conical lobes, the structure of the clamp is simplified, the cost of the clamp is reduced, a clamping power device is saved, the operation is fast, the auxiliary time is saved, the production rate can be effectively improved, the manufacturing cost of the flange plate and the pull rod screw is reduced, and the manufacturing period is shortened.

Description

Internal expansion type precision turning clamp

Technical Field

The utility model relates to a turning anchor clamps specifically are accurate turning anchor clamps of interior expanding belongs to anchor clamps technical field.

Background

The turning clamp has the advantages that the existing internal expansion type clamp in China is various in types, the application of the structural design of the clamp is different, the turning clamp is compact in structure, flexible and convenient to operate and high in centering precision, workpieces can be loaded and unloaded without stopping, the auxiliary time is shortened, the work efficiency is improved, and the three-slider expansion turning clamp is formed by combining a slider, a cushion block and a cone. The fixture has the advantages of good rigidity, reliable workpiece clamping, no vibration during machining, high part machining precision and suitability for rough machining and finish machining of thin-wall sleeve parts in mass production. The clamp can well ensure the concentricity of the cylindrical surface of the part after turning and clamping.

Although the clamp is widely used, the clamp generally has some problems, one of which is that the clamping device has a small variable range and is only suitable for parts with a certain range of size, most of which is only suitable for sleeve-type or barrel-type parts, and thin-wall-type parts with end faces are not considered, and the other is that generally, the internal expansion type clamp in the current market has high centering precision and small stroke, or has large stroke and low precision, and the two are not compatible, and the internal expansion type precision turning clamp is designed aiming at the defects of the various clamps through the analysis of the various clamps, has a compact structure, high centering precision and large clamping force and clamping stroke, and is suitable for a series of parts taking an inner hole as a positioning reference.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an interior expanding precision turning anchor clamps in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose: an internal expansion type precision turning clamp comprises a rubber ring, an inner hexagonal flat end set screw, a T-shaped sliding key, a T-shaped pre-tightening conical shaft, a central connecting disc, a flange plate, a pull rod screw, an inner hexagonal cylindrical head screw, a pin shaft, a split washer, a flyweight, a support, a flat washer for the pin shaft, a single conical petal, a stud, a positioning conical shaft, a threaded disc and a circular disc; the rubber ring is arranged on the vertical outer surface of the T-shaped pre-tightening conical shaft, the inner hexagonal flat end set screw is connected to the T-shaped sliding key, the T-shaped sliding key is fixed inside the T-shaped pre-tightening conical shaft, the T-shaped pre-tightening conical shaft is installed above the central connecting disc, the central connecting disc is fixed on the upper surface of the connecting disc, the connecting disc is positioned between the flange disc and the central connecting disc, the flange disc is fixed below the connecting disc, the pull rod screw penetrates through the fixed flange disc and is positioned below the flange disc, the inner hexagonal cylinder head screw is positioned above the flange disc and is used for connecting the flange disc and the connecting disc, the pin shaft is fixed on the outer side surface of the split retainer ring, the split retainer ring is arranged between the pin shaft and the support, the flyweight is connected to the support, the support is connected between the flyweight and the central connecting disc, the single-cone-lobe positioning device is characterized in that the single cone lobes are symmetrically arranged on two sides of the positioning conical shaft, the stud is located below the positioning conical shaft and located on the central shaft, the positioning conical shaft is fixed right above the stud, the threaded discs are arranged on two sides of the stud and located inside the central connecting disc, and the circular disc is connected below the stud.

Preferably, in order to ensure the stability and the connection feasibility of the cone flaps and increase the friction coefficient between the contact of the fixture and a workpiece, so that the whole fixture structure is more perfect, and the clamping is more convenient and feasible, the positioning cone shaft, the connecting disc, the T-shaped pre-tightening cone shaft and the six single cone flaps form two positioning and clamping mechanisms of the fixture, one positioning cone shaft, the T-shaped pre-tightening cone shaft and the six single cone flaps, and the other positioning cone shaft, the connecting disc and the six single cone flaps form two positioning and clamping mechanisms.

Preferably, in order to simplify the structure of the clamp, reduce the cost of the clamp, save clamping power devices, operate quickly, save auxiliary time and effectively improve productivity, the flyweights, the disk, the positioning conical shaft and the single conical flaps form a centrifugal clamping device of the clamp, the flyweights rotate outwards around the central shaft under the action of centrifugal force, so that the disk moves upwards, the positioning conical shaft moves upwards through the central shaft connected with the disk, and the single conical flaps are opened and clamped.

Preferably, in order to reduce the manufacturing cost, shorten the manufacturing period and meet the characteristics of stable manufacturing precision and facilitate the standardized and serialized production, the flange plate and the pull rod screw are connected with a spindle of a numerical control machine tool, or are connected with a spindle of a common machine tool through a C-shaped flange plate and a flange plate double-head screw nut.

Preferably, in order to ensure the coordination and the smoothness of the overall assembly of the clamp, ensure the stable transition between the connection and increase the clamping stroke, the hexagon socket head cap screws are fixed between the clamp body and each part according to various specifications, the connecting parts of the support and the flyweight are connected by 304 stainless steel flat-end single-side grooved pin shaft matched split retainer rings in different specifications, and the positioning and clamping mechanism part limits the degree of freedom by using an extension spring and a rubber ring.

The utility model has the advantages that: the internal expansion type precision turning clamp is reasonable in design, the positioning conical shaft, the T-shaped pre-tightening conical shaft, the moving conical shaft and the conical flaps form two positioning and clamping mechanisms of the clamp, one positioning and clamping mechanism comprises the positioning conical shaft, the moving conical shaft and six double conical flaps, the other positioning conical shaft, the T-shaped pre-tightening conical shaft and six single conical flaps form a centrifugal clamping device of the clamp, the stability and the connection feasibility of the conical flaps are ensured, the friction coefficient between the clamp and a workpiece is increased, the whole clamp structure is more perfect, the clamping is more convenient and feasible, the flyweights, the circular disc, the positioning conical shaft and the single conical flaps form the centrifugal clamping device of the clamp, the flyweights rotate outwards around the central shaft under the action of centrifugal force, so that the circular disc moves upwards, the positioning conical shaft moves upwards through the central shaft connected with the circular disc, the single conical flaps are opened and clamped, the structure of the clamp is simplified, the cost of the clamp is reduced, and a clamping power device is, the inner hexagonal socket head screw is fixed between the clamp body and each part by adopting various specifications, the connecting part of the support and the flyweight is connected by adopting 304 stainless steel single-side flat-end groove pin shafts with different specifications and matching with split retainer rings, the positioning and clamping mechanism part limits the degree of freedom by utilizing a tension spring and a rubber ring, ensures the coordination and comfort of the whole assembly of the clamp, ensures the stable transition between the connection and increases the clamping stroke.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the present invention;

fig. 3 is a schematic sectional view of the present invention.

In the figure: 1. the device comprises a rubber ring, 2 parts of an inner hexagonal flat end set screw, 3 parts of a T-shaped sliding key, 4 parts of a T-shaped pre-tightening conical shaft, 5 parts of a central connecting disc, 6 parts of a connecting disc, 7 parts of a flange plate, 8 parts of a pull rod screw, 9 parts of an inner hexagonal cylindrical head screw, 10 parts of a pin shaft, 11 parts of a split retainer ring, 12 parts of a flyweight, 13 parts of a support, 14 parts of a flat washer for the pin shaft, 15 parts of a single conical flap, 16 parts of a double-end stud, 17 parts of a positioning conical shaft, 18 parts of a threaded disc, 19 parts of a.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, an internal expansion type precision turning fixture comprises a rubber ring 1, an internal hexagonal flat end set screw 2, a T-shaped sliding key 3, a T-shaped pre-tightening conical shaft 4, a central connecting disc 5, a connecting disc 6, a flange plate 7, a pull rod screw 8, an internal hexagonal cylinder head screw 9, a pin shaft 10, an open retainer ring 11, a flyweight 12, a support 13, a flat washer 14 for the pin shaft, a single conical lobe 15, a stud 16, a positioning conical shaft 17, a threaded disc 18 and a circular disc 19; the rubber ring 1 is arranged on the vertical outer surface of a T-shaped pre-tightening conical shaft 4, the inner hexagonal flat end set screw 2 is connected to a T-shaped sliding key 3, the T-shaped sliding key 3 is fixed inside the T-shaped pre-tightening conical shaft 4, the T-shaped pre-tightening conical shaft 4 is installed above a central connecting disc 5, the central connecting disc 5 is fixed on the upper surface of the connecting disc 6, the connecting disc 6 is positioned between a flange 7 and the central connecting disc 5, the flange 7 is fixed below the connecting disc 6, a pull rod screw 8 penetrates through the fixed flange 7 and is positioned below the flange 7, an inner hexagonal cylinder head screw 9 is positioned above the flange 7 and is used for connecting the flange 7 and the connecting disc 6, the pin shaft 10 is fixed on the outer side surface of an open retainer ring 11, the open retainer ring 11 is arranged between the pin shaft 10 and a support 13, and the flyweight 12 is connected to the support 13, the support 13 is connected between the flyweight 12 and the central connecting disc 5, the flat washer 14 for the pin shaft is arranged on the outer surface of the support 13, the single conical lobes 15 are symmetrically arranged on two sides of the positioning conical shaft 17, the stud 16 is positioned below the positioning conical shaft 17 and on the central shaft, the positioning conical shaft 17 is fixed right above the stud 16, the threaded discs 18 are arranged on two sides of the stud 16 and inside the central connecting disc 5, and the circular disc 19 is connected below the stud 16.

The positioning conical shaft 17, the connecting disc 6, the T-shaped pre-tightening conical shaft 4 and the six single conical petals 15 form two positioning and clamping mechanisms of the clamp, the stability and the connection feasibility of the conical petals are ensured, the friction coefficient between the clamp and a workpiece is increased, the structure of the whole clamp is more perfect, the clamping is more convenient and feasible, the flyweight 12, the disc 19, the positioning conical shaft 17 and the single conical petals 15 form a centrifugal clamping device of the clamp, the flyweight 12 rotates outwards around a central shaft under the action of centrifugal force, so that the disc 19 moves upwards, the positioning conical shaft 17 moves upwards through the central shaft connected with the disc 19, the single conical petals 15 are opened and clamped, the structure of the clamp is simplified, the cost of the clamp is reduced, a clamping power device is saved, the operation is fast, the auxiliary time is saved, the production rate can be effectively improved, the flange 7 and the pull rod 8 screw are connected with a main shaft of a numerical control machine tool, or the C-shaped flange plate and the flange plate double-head screw nut are connected with the main shaft of the common machine tool, so that the manufacturing cost is reduced, the manufacturing period is shortened, the stable manufacturing precision is met, and the standardized and serialized production is facilitated.

The working principle is as follows: when the internal expansion type precision turning clamp is used, a flange plate 7 and a pull rod screw 8 of the clamp are connected with a machine tool main shaft, a positioning conical shaft 17 is used for positioning, a nut is rotated by an open spanner, a front T-shaped pre-tightening conical shaft 4 (or a T-shaped groove connecting disc) is axially moved by adjusting the nut, a cone flap is pushed to radially slide to achieve the purpose of clamping a workpiece, when a part is machined, the nut is adjusted by the open spanner until the diameter of the cone flap is smaller than the inner diameter of the workpiece, after the part is sleeved in the nut, the cone flap is radially moved until the workpiece is clamped, after a lathe is started, two flyweights 12 rotate together with the clamp when the machine tool main shaft rotates at a high speed, centrifugal force is generated, the flyweights 12 outwards rotate around a central shaft under the action of the centrifugal force, and; the positioning conical shaft 17 moves axially through a central shaft connected with the disc 19 to drive the conical flaps to move radially to clamp a workpiece, and after the workpiece is machined, the nut is adjusted by an open end wrench, so that the part can be taken down.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an interior bloated accurate turning anchor clamps which characterized in that: the device comprises a rubber ring (1), an inner hexagonal flat end set screw (2), a T-shaped sliding key (3), a T-shaped pre-tightening conical shaft (4), a central connecting disc (5), a connecting disc (6), a flange plate (7), a pull rod screw (8), an inner hexagonal cylindrical head screw (9), a pin shaft (10), an open retainer ring (11), a flyweight (12), a support (13), a flat washer (14) for the pin shaft, a single conical flap (15), a stud (16), a positioning conical shaft (17), a threaded disc (18) and a circular disc (19); the rubber ring (1) is arranged on the vertical outer surface of a T-shaped pre-tightening conical shaft (4), an inner hexagonal flat end set screw (2) is connected to a T-shaped sliding key (3), the T-shaped sliding key (3) is fixed inside the T-shaped pre-tightening conical shaft (4), the T-shaped pre-tightening conical shaft (4) is arranged above a central connecting disc (5), the central connecting disc (5) is fixed on the upper surface of the connecting disc (6), the connecting disc (6) is located between a flange disc (7) and the central connecting disc (5), the flange disc (7) is fixed below the connecting disc (6), a pull rod screw (8) penetrates through the fixed flange disc (7) and is located below the flange disc (7), an inner hexagonal cylindrical head screw (9) is located above the flange disc (7) and is used for connecting the flange disc (7) and the connecting disc (6), and a pin shaft (10) is fixed on the outer side face of an open retainer ring (11), the split retainer ring (11) is arranged between a pin shaft (10) and a support (13), the flyweight (12) is connected to the support (13), the support (13) is connected between the flyweight (12) and the central connecting disc (5), the pin shaft is arranged on the outer surface of the support (13) through a flat washer (14), the single-cone petals (15) are symmetrically arranged on two sides of a positioning conical shaft (17), the stud (16) is located below the positioning conical shaft (17) and located on the central shaft, the positioning conical shaft (17) is fixed right above the stud (16), the threaded discs (18) are arranged on two sides of the stud (16) and located inside the central connecting disc (5), and the circular disc (19) is connected below the stud (16).

2. The internal expanding precision turning fixture of claim 1, wherein: the positioning taper shaft (17), the connecting disc (6), the T-shaped pre-tightening taper shaft (4) and the six single taper lobes (15) form two positioning and clamping mechanisms of the clamp, one mechanism comprises the positioning taper shaft (17), the T-shaped pre-tightening taper shaft (4) and the six single taper lobes (15), and the other mechanism comprises the positioning taper shaft (17), the connecting disc (6) and the six single taper lobes (15).

3. The internal expanding precision turning fixture of claim 1, wherein: the flyweights (12), the disc (19), the positioning conical shaft (17) and the single conical petals (15) form a centrifugal clamping device of the clamp, the flyweights (12) rotate outwards around a central shaft under the action of centrifugal force, so that the disc (19) moves upwards, the positioning conical shaft (17) moves upwards through the central shaft connected with the disc (19), and the single conical petals (15) are opened and clamped.

4. The internal expanding precision turning fixture of claim 1, wherein: and the flange plate (7) and the pull rod screw (8) are connected with a main shaft of a numerical control machine tool or are connected with a main shaft of a common machine tool through a C-shaped flange plate and a flange plate double-head screw nut.

5. The internal expanding precision turning fixture of claim 1, wherein: the inner hexagonal socket head cap screw (9) is fixed between the clamp body and each part by adopting each specification, the connecting part of the support (13) and the flyweight (12) is connected by adopting 304 stainless steel flat-head single-side grooved pin shaft (10) matched with the split retainer ring (11) with different specifications, and the positioning and clamping mechanism part limits the degree of freedom by utilizing the extension spring and the rubber ring (1).