CN215035717U - Clamping mechanism for processing circular workpiece - Google Patents

Abstract

The utility model relates to a fixture for circular workpiece processing, including installation base, setting element and driving piece. The mounting base is fixedly connected with a machine tool for processing the round workpiece. The locating piece comprises a cylindrical locating main body, wherein one end face of the locating main body is fixedly connected with the installation base, and the other end face of the locating main body extends towards the right side to form three fan-shaped parts. The circular workpiece clamping device comprises a driving source, a plurality of sector parts, a plurality of jacking blocks, a plurality of clamping blocks, a plurality of radial supporting blocks, and a plurality of radial supporting blocks.

Description

Clamping mechanism for processing circular workpiece

Technical Field

The utility model relates to a machine parts processing technology field especially relates to a fixture for circular workpiece processing.

Background

In the process of the mechanical industry, the requirements on the machining precision and the machining shape and position of a machined workpiece are higher and higher, and particularly the machining of a single workpiece is performed.

At present, in the field of machining, the quality and efficiency of circular machining are required to be ensured for machining the outer ring of a circular workpiece. When a circular workpiece is machined, a clamp for clamping the outer surface of the workpiece is needed, for example, a clamping jaw chuck is used for clamping to clamp the outer surface of the workpiece, but when the clamping jaw chuck is used for clamping, the clamping force is uneven due to the small stress area, the surface of the circular workpiece is easy to damage, and the machining process is relatively limited.

For this reason, we propose a clamping mechanism for circular workpiece machining capable of uniformly distributing a clamping force over the entire circumferential surface of the circular workpiece.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In view of the above-mentioned shortcoming, not enough of prior art, the utility model provides a fixture for circular workpiece processing, it has solved that the lifting surface area leads to the clamping-force inhomogeneous for a short time, and then causes the technical problem of damage to circular workpiece surface easily.

(II) technical scheme

In order to achieve the above object, the utility model discloses a main technical scheme include:

on one hand, the clamping mechanism for processing the circular workpiece comprises a mounting base, a positioning piece and a driving piece;

the mounting base is fixedly connected with a machine tool for processing a round workpiece; the positioning piece comprises a cylindrical positioning main body, wherein one end face of the positioning main body is fixedly connected with the mounting base, the other end face of the positioning main body extends towards the right side to form three fan-shaped parts, and the three fan-shaped parts are arranged at equal intervals; a plurality of step sections are arranged along the circumferential direction of the fan-shaped part, and the step sections are used for mounting the circular workpiece;

the driving piece is arranged inside the mounting base; the driving piece comprises a driving source, a driving shaft and a jacking block; the driving source is in driving connection with the driving shaft and is used for providing a power source for the driving shaft; the right end of the driving shaft is fixed with the jacking block, and the central axes of the driving shaft and the jacking block are overlapped and are overlapped with the central axis of the circular workpiece;

the drive source drives the drive shaft to reciprocate the drive shaft in an axial direction thereof; and then the jacking block moves along the axis direction of the driving shaft along with the driving shaft, so that the jacking block jacks three sectors respectively, and the three sectors are propped open along the radial direction of the sectors to clamp the circular workpiece.

Optionally, the fan-shaped part comprises an installation cambered surface and limiting plates integrally formed with two ends of the installation cambered surface;

the limiting plates extend towards the circle center of the sector portion along the radial direction of the limiting plates, the two limiting plates and the installation cambered surface form a jacking cavity, and an arc inside the installation cambered surface is in a taper angle.

Optionally, the jacking block comprises a central part, and three segments are formed by extending outwards along the circumferential direction of the central part;

the fan-shaped block is provided with a jacking cambered surface and two connecting surfaces; the jacking arc surface is abutted against the jacking cavity, one end of the connecting surface and the jacking arc surface are integrally formed, the other end of the connecting surface and the central part are integrally formed, and the central angle degrees of the jacking arc surface and the installation arc surface are the same;

the central part is provided with an installation hole, and an installation bolt penetrates through the installation hole to fixedly connect the central part with the driving shaft, so that the driving shaft drives the central part to reciprocate along the central axis of the driving shaft, and further drives the three fan-shaped blocks to move along the axial direction, and the jacking cambered surfaces of the fan-shaped blocks are jacked tightly with the jacking cavities.

Optionally, the mounting base comprises a connecting plate, a mounting cylinder and a mounting seat;

the periphery of one end face of the connecting plate is provided with a plurality of screw holes along the radial direction, and the connecting plate is connected with the machine tool through the screw holes by the bolts;

one end face of the mounting cylinder and one end face of the connecting plate are integrally formed, and the connecting plate extends outwards relative to the mounting cylinder along the radial direction of the connecting plate to form a threaded end face;

the mounting cylinder is internally provided with an inner cavity, and the driving piece is arranged in the inner cavity;

the mounting cylinder extends outwards relative to the mounting seat along the radial direction of the mounting cylinder to form an annular step positioning end face;

one end face of the mounting seat and the other end face of the mounting cylinder are integrally formed, and the other end face of the mounting seat and one end face of the positioning main body are fixed through bolt threads.

Optionally, a limiting step is arranged on the tightening cavity and used for limiting the position of the segment.

Optionally, the included angle between adjacent sectors is 120 °.

Optionally, the angle of the taper angle is 1.5 °.

Optionally, there are six of said screw holes.

Optionally, there are two of the step sections.

(III) advantageous effects

The utility model has the advantages that: the utility model discloses a fixture for circular workpiece processing, the axial motion of drive shaft along its drive end is driven in the start-up through the driving source, at this moment, with the tight three sector in drive shaft fixed connection's top respectively top, three sector radially struts along its place to realize the laminating of circular workpiece internal surface, with the even sparse whole circular workpiece periphery of clamp force, make and press from both sides tight back circular workpiece outer lane and not produce little deformation, fundamentally solves the circular workpiece atress and produces the problem of surface deformation. The clamping force is uniformly dispersed to the circumferential surface of the whole circular workpiece from the inside, and the damage of the clamp to the outer surface of the circular workpiece can be greatly reduced when the outer ring of the circular workpiece is machined. Moreover, the circular workpiece can be quickly positioned in the clamping mechanism through the step section, so that a complicated alignment process is omitted, and meanwhile, the efficiency is higher under the condition of small-batch and multi-variety production, because the production preparation, equipment adjustment and process inspection time can be reduced. An optimum amount of cutting can be performed, thereby reducing cutting time again.

Drawings

Fig. 1 is a schematic view of the apparatus assembly of the clamping mechanism for processing a circular workpiece according to the present invention;

fig. 2 is a schematic view of an installation base of the clamping mechanism for processing the circular workpiece;

fig. 3 is a schematic view of a positioning member of the clamping mechanism for processing the circular workpiece according to the utility model;

fig. 4 is a schematic view of a tightening block of the clamping mechanism for processing the circular workpiece.

[ description of reference ]

1: installing a base; 111: a connecting plate; 112: mounting the cylinder; 113: a mounting seat; 114: a screw hole; 2: a positioning member; 21: a positioning body; 3: a drive shaft; 4: a jacking block; 41: a sector block; 42: mounting holes; 5: a sector; 51: installing an arc surface; 52: a limiting plate; 6: and a limiting step.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings. Where directional terms such as "upper", "lower", "left" and "right" are used herein, reference is made to the orientation of FIG. 3. Herein, a side on which the rear cover 200 is positioned is defined as "right".

On the one hand, as shown in fig. 1, an embodiment of the present invention provides a clamping mechanism for processing a circular workpiece, including an installation base 1, a positioning element 2 and a driving element.

The mounting base 1 is fixedly connected with a machine tool for processing a round workpiece. The positioning member 2 includes a cylindrical positioning body 21, wherein one end surface of the positioning body 21 is fixedly connected to the mounting base 1, the other end surface of the positioning body 21 extends towards the right side to form three sectors 5, and the three sectors 5 are arranged at equal intervals. Further, the angle between adjacent sectors 5 is 120 °. The purpose is to ensure that the sector 5 tightly pushes the inner surface of the round workpiece outwards, so that the clamping force of the sector 5 on the round workpiece is more uniform. A plurality of step sections are arranged along the circumferential direction of the fan-shaped part 5, and the step sections are used for installing a round workpiece. Preferably, there are two step sections. Each sector 5 is provided with a step section for realizing positioning on one hand, and two step sections can process two circular workpieces with different sizes on the other hand.

Further, the mounting base 1 includes a connection plate 111, a mounting cylinder 112, and a mounting seat 113.

The outer periphery of one end face of the connecting plate 111 is provided with a plurality of screw holes 114 along the radial direction thereof, and bolts connect the connecting plate 111 to a machine tool through the screw holes 114. Preferably, there are six screw holes 114. Uniform stress, so that the mounting base 1 is more stably fixed with the machine tool and is convenient to detach.

An end face of the mounting cylinder 112 is provided integrally with an end face of the connecting plate 111, and the connecting plate 111 is provided extending radially outward relative to the mounting cylinder 112 to form a screw-threaded end face.

The mounting cylinder 112 has an inner cavity therein, and the driving member is disposed in the inner cavity. And a controller is also arranged in the inner cavity and used for controlling the start and stop of a driving source of the driving piece. The controller is a conventional device for those skilled in the art, and is not particularly limited in the present invention.

The mounting cylinder 112 extends radially outwardly relative to the mounting seat 113 to form an annular stepped locating end surface.

One end surface of the mounting base 113 is integrally formed with the other end surface of the mounting tube 112, and the other end surface of the mounting base 113 is screwed to one end surface of the positioning body 21 by a bolt.

Further, the segment 5 includes a mounting arc surface 51 and a stopper plate 52 integrally formed with both ends of the mounting arc surface 51.

The limiting plates 52 extend towards the center of the circle where the fan-shaped part 5 is located along the radial direction, the two limiting plates 52 and the installation cambered surface 51 form a jacking cavity, and the arc inside the installation cambered surface 51 is in a cone angle. Preferably, the angle of the cone angle is 1.5 °. The tightening effect is good when the angle of the cone angle is 1.5 degrees.

Further, the holding-up block 4 includes a central portion, and three segments 41 are formed extending outward in the circumferential direction of the central portion.

The fan-shaped block 41 is provided with a jacking cambered surface and two connecting surfaces; the tight cambered surface in top offsets with the tight chamber in top, and the one end of connecting the face sets up with the tight cambered surface in top integrated into one piece, and the other end of connecting the face sets up with central part integrated into one piece, and the tight cambered surface in top is the same with the central angle degree at installation cambered surface 51 place.

The central portion has mounting hole 42, and the mounting bolt passes mounting hole 42 and with central portion and drive shaft 3 fixed connection to make drive shaft 3 drive central portion along the central axis reciprocating motion of drive shaft 3, and then drive three segment 41 along axial motion, make the tight cambered surface in top of segment 41 with push up tight chamber and push up tightly.

Further, in order to prevent the phenomenon that the puller block 4 falls off when moving in the puller cavity. And a limiting step 6 is arranged on the tightening cavity, and the limiting step 6 is used for limiting the position of the fan-shaped block 41.

The driving piece comprises a driving source, a driving shaft 3 and a jacking block 4; the driving source is electrically connected with the controller, is in driving connection with the driving shaft 3, and is used for providing a power source for the driving shaft 3. The right end of the driving shaft 3 is fixed with the jacking block 4, and the central axes of the driving shaft and the jacking block are overlapped and are overlapped with the central axis of the circular workpiece.

Under the control of the controller, the drive source drives the drive shaft 3 to reciprocate the drive shaft 3 in the axial direction thereof. And then the tight piece 4 of top follows drive shaft 3 and moves along its axis direction for tight piece 4 of top tightly three sectorial portion 5 respectively, three sectorial portion 5 struts in order to press from both sides tight circular work piece along its radial direction in place.

The utility model provides a fixture for circular workpiece processing, start the axial motion that drives drive shaft 3 along its drive end through controller control driving source, at this moment, with the tight three sector 5 in the tight piece 4 difference top of 3 fixed connection in the top of drive shaft, three sector 5 radially struts along its place, in order to realize the laminating of circular workpiece internal surface, with the even evacuation of clamp force whole circular workpiece periphery, make and press from both sides tight back circular workpiece outer lane and not produce little deformation, fundamentally solves the problem that circular workpiece atress produced surface deformation. The clamping force is uniformly dispersed to the circumferential surface of the whole circular workpiece from the inside, and the damage of the clamp to the outer surface of the circular workpiece can be greatly reduced when the outer ring of the circular workpiece is machined. Moreover, the circular workpiece can be quickly positioned in the clamping mechanism through the step section, so that a complicated alignment process is omitted, and meanwhile, the efficiency is higher under the condition of small-batch and multi-variety production, because the production preparation, equipment adjustment and process inspection time can be reduced. An optimum amount of cutting can be performed, thereby reducing cutting time again.

The working principle is as follows: the mounting base 1 is first mounted on the machine tool and then mounted thereon using screws through six screw holes 114 in the mounting base 1. And (4) tightening according to a symmetrical tightening principle. Secondly, a power supply is connected to the mounting base part, and the round workpiece is sleeved on the step section of the positioning piece 2. Finally, under the control of a controller in the installation base 1, the driving shaft 3 axially moves in the positioning piece 2, and a certain amount of movement exists in the jacking cavity. The fan-shaped tightening block 4 on the driving shaft 3 moves axially in a tightening cavity with a certain taper angle, and the inner part is gradually enlarged in the moving process. The outer part of the positioning piece 2 is gradually pressed against the inner part of the round workpiece. The damage of the clamp to the inner surface of the round workpiece is greatly reduced after clamping. The roundness problem of the round thin-wall workpiece is fundamentally solved. Furthermore, the circular workpiece is stressed uniformly, micro deformation of the circular workpiece during clamping can be strictly controlled, the roundness of the circular workpiece is improved, the manufacturing precision of the circular workpiece is improved, noise and vibration of a bearing of the circular workpiece during high-speed operation are reduced, and the overall performance of the circular workpiece is greatly improved. Compared with the traditional method of using a four-jaw chuck to align and clamp, the method can save the scribing time and the alignment step according to the line, shorten the working procedure, obviously save the production time, reduce the production, save the materials, have the same large area and use less materials. Simultaneously, the feeding and discharging are convenient and the application range is wide.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (9)

1. The utility model provides a fixture for circular workpiece processing which characterized in that: comprises a mounting base (1), a positioning piece (2) and a driving piece;

the mounting base (1) is fixedly connected with a machine tool for processing a round workpiece; the positioning piece (2) comprises a cylindrical positioning main body (21), wherein one end face of the positioning main body (21) is fixedly connected with the mounting base (1), the other end face of the positioning main body (21) extends towards the right side to form three fan-shaped parts (5), and the three fan-shaped parts (5) are arranged at equal intervals; a plurality of step sections are arranged along the circumferential direction of the fan-shaped part (5), and the step sections are used for mounting the circular workpiece;

the driving piece is arranged inside the mounting base (1); the driving piece comprises a driving source, a driving shaft (3) and a jacking block (4); the driving source is in driving connection with the driving shaft (3), and is used for providing a power source for the driving shaft (3); the right end of the driving shaft (3) is fixed with the jacking block (4), and the central axes of the driving shaft and the jacking block are overlapped and are overlapped with the central axis of the circular workpiece;

the drive source drives the drive shaft (3) to reciprocate the drive shaft (3) in an axial direction thereof; and then the puller block (4) moves along the axis direction of the drive shaft (3) along with the drive shaft, so that the puller block (4) respectively jacks three fan-shaped parts (5), and the three fan-shaped parts (5) are spread along the radial direction of the fan-shaped parts to clamp the round workpiece.

2. The clamping mechanism for circular workpiece machining according to claim 1, characterized in that: the fan-shaped part (5) comprises an installation cambered surface (51) and limiting plates (52) which are integrally formed with the two ends of the installation cambered surface (51);

the limiting plates (52) extend towards the circle center where the fan-shaped part (5) is located along the radial direction of the limiting plates, a jacking cavity is formed by the two limiting plates (52) and the installation cambered surface (51), and the arc inside the installation cambered surface (51) is in a taper angle.

3. The clamping mechanism for circular workpiece machining according to claim 2, characterized in that: the jacking block (4) comprises a central part, and three fan-shaped blocks (41) are formed by extending outwards along the circumferential direction of the central part;

the fan-shaped block (41) is provided with a jacking cambered surface and two connecting surfaces; the jacking arc surface is abutted against the jacking cavity, one end of the connecting surface and the jacking arc surface are integrally formed, the other end of the connecting surface and the central part are integrally formed, and the number of central angles of the jacking arc surface and the installation arc surface (51) is the same;

the central part is provided with a mounting hole (42), and a mounting bolt penetrates through the mounting hole (42) to fixedly connect the central part with the driving shaft (3), so that the driving shaft (3) drives the central part to reciprocate along the central axis of the driving shaft (3), and further drives the three fan-shaped blocks (41) to move along the axial direction, and the jacking arc surface of the fan-shaped block (41) is jacked with the jacking cavity.

4. A clamping mechanism for circular workpiece machining according to claim 3, characterized in that: the mounting base (1) comprises a connecting plate (111), a mounting cylinder (112) and a mounting seat (113);

the periphery of one end face of the connecting plate (111) is provided with a plurality of screw holes (114) along the radial direction, and the connecting plate (111) is connected with the machine tool through the screw holes (114) by bolts;

one end face of the mounting cylinder (112) and one end face of the connecting plate (111) are integrally formed, and the connecting plate (111) extends outwards relative to the mounting cylinder (112) along the radial direction of the connecting plate to form a threaded end face;

the mounting cylinder (112) is internally provided with an inner cavity, and the driving piece is arranged in the inner cavity;

the mounting cylinder (112) extends outwards relative to the mounting seat (113) along the radial direction of the mounting cylinder to form an annular step positioning end face;

one end face of the mounting seat (113) and the other end face of the mounting cylinder (112) are integrally formed, and the other end face of the mounting seat (113) and one end face of the positioning main body (21) are fixed through bolts in a threaded mode.

5. The clamping mechanism for circular workpiece machining according to claim 4, characterized in that: and the tight jacking cavity is provided with a limiting step (6), and the limiting step (6) is used for limiting the position of the fan-shaped block (41).

6. The clamping mechanism for circular workpiece machining according to claim 5, characterized in that: the included angle between the adjacent sectors (5) is 120 degrees.

7. The clamping mechanism for circular workpiece machining according to claim 6, characterized in that: the angle of the cone angle is 1.5 °.

8. The clamping mechanism for circular workpiece machining according to claim 7, characterized in that: six screw holes (114) are formed.

9. The clamping mechanism for circular workpiece machining according to claim 8, characterized in that: the number of the step sections is two.

Images