CN110091189B

CN110091189B - Long workpiece machining machine tool center frame

Info

Publication number: CN110091189B
Application number: CN201910315674.3A
Authority: CN
Inventors: 张舵
Original assignee: North China University of Science and Technology
Current assignee: North China University of Science and Technology
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2023-03-31
Anticipated expiration: 2039-04-19
Also published as: CN110091189A

Abstract

The invention discloses a long workpiece processing machine tool center frame, which comprises: support frame, change, supporting claw, base, supporting seat, adjustable ring, the grip ring that is located the support frame, centre gripping subassembly annular array arranges that the centre gripping subassembly includes pendulum rod, holding head and centre gripping post, holding head and pendulum rod fixed connection, the one end of pendulum rod is connected through changeing the round pin with the grip ring, and changes and set up volute spiral spring on the round pin, the activity of centre gripping post sets up in the blind hole of holding head, and the centre gripping post sets up a plurality ofly, and is the rectangular array and arranges that it establishes the pressure spring to lie in the cover on the centre gripping post in the centre gripping head. Aiming at the problem that non-circumferential long workpieces such as square shafts and the like are difficult to clamp in the machining process, the workpiece is clamped in the clamping assembly by the clamping assemblies, and the clamping columns can form a shape which is matched with the surface of the workpiece in a consistent manner, so that the clamping ring and the workpiece synchronously rotate and are supported by the supporting claws of the outer ring, the problem that the long workpieces are greatly bent in the machining process is solved, and the machining precision is ensured.

Description

Long workpiece machining machine tool center frame

Technical Field

The invention relates to the technical field of machine tool machining, in particular to a center frame of a long workpiece machining machine tool.

Background

When shaft parts are machined, one end of the shaft parts is usually clamped, the other end of the shaft parts is propped against the center, and when the shaft parts meet longer conditions, the middle parts of the shaft parts can sag and bend, so that the machining quality is influenced, and the shaft parts are generally supported by the center frame in the middle parts of the shaft parts.

The existing center frame usually adopts a three-way positioning mode, and the movement of the supporting claws is controlled through a threaded bolt structure, but the supporting claws of the existing center frame are mutually independent and need to be adjusted one by one, and the centering accuracy is difficult to ensure; in addition, the existing center frame can only be used for processing the circumferential surfaces of shaft parts, and for parts with other shapes, such as common square wooden table legs, and parts with irregular circumferential surfaces, the center frame is inconvenient to clamp and difficult to ensure the supporting property.

A lathe center frame with the publication number of CN207171512U is characterized in that a ring with a smooth cylindrical surface is arranged on a plane where 3 single-row deep groove ball bearings are located, and when the excircle of a machined workpiece is rusted or the excircle is not a smooth cylindrical surface, the bearing can be rotated on the bearing only by finding three coaxial points on the excircle of the workpiece and fixing the three coaxial points on the ring through screws. However, the technology can only be applied to workpieces with irregular surface circumferences, and the clamping effect of the Fang Zhoulei workpiece is still difficult to achieve.

Disclosure of Invention

The invention aims to provide a center frame of a long workpiece processing machine tool, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a long work machine tool center frame comprising: the supporting frame is annular, and the bottom of the supporting frame is welded and fixed on the base; the supporting claw sets up three groups along support frame center array, and can follow the radial movement of support frame, and the gyro wheel is installed to the one end of supporting claw, the center pin of gyro wheel is parallel with the center pin of support frame, the grip ring is articulated to be formed by two semicircle rings, sets up four group at least centre gripping subassemblies in the grip ring, centre gripping subassembly annular array arranges that the centre gripping subassembly includes pendulum rod, supporting head and centre gripping post, the supporting head and pendulum rod fixed connection, the one end and the grip ring of pendulum rod pass through the swivel pin and are connected, and set up volute spring on the swivel pin, centre gripping post activity sets up in the blind hole in the supporting head, and the centre gripping post sets up a plurality ofly, and is the rectangle array and arranges, lies in the cover on the centre gripping post in the clamping head and establishes the pressure spring.

As a further scheme of the invention: the supporting claw adopts a square shaft structure.

As a further scheme of the invention: the support device is characterized in that a thread groove is formed in one end face of the support claw, the rotating ring is rotatably installed on one side end face of the support frame, a plane thread is arranged on the end face of the rotating ring, an inclined plane is arranged on the periphery of the plane thread, a first inclined tooth groove is formed in the inclined plane, and the plane thread is meshed with the thread groove in the support claw.

As a further scheme of the invention: the end face of the rotating ring is provided with an annular bulge, and the bulge is embedded into a clamping groove fixedly arranged on the side face of the support frame.

As a further scheme of the invention: the adjusting ring is rotatably installed on the side face of the supporting frame, a second skewed tooth groove is formed in the adjusting ring, and the second skewed tooth groove is meshed with the first skewed tooth groove.

As a further scheme of the invention: the side face of the adjusting ring is set to be a hexahedron shape the same as the shape of the nut.

As a further scheme of the invention: the base activity sets up on the supporting seat, and base bottom excircle sets up the external screw thread to install fastening nut.

As a further scheme of the invention: the circular shape is to heart regulating plate to installation on the terminal surface of support frame, to heart regulating plate and support frame rotate to be connected, set up the through-hole to the centre of a circle department of regulating plate.

Compared with the prior art, the invention has the beneficial effects that: aiming at the problem that non-circumferential long workpieces such as square shafts and the like are difficult to clamp in the machining process, the workpiece is clamped in the clamping assembly by the clamping assemblies, and the clamping columns can form a shape which is matched with the surface of the workpiece in a consistent manner, so that the clamping ring and the workpiece synchronously rotate and are supported by the supporting claws of the outer ring, the problem that the long workpieces are greatly bent in the machining process is solved, and the machining precision is ensured.

Drawings

Fig. 1 is a schematic front view of a first embodiment of the present invention.

Fig. 2 is a schematic side view of a support ring according to an embodiment of the invention.

Fig. 3 is a schematic structural diagram of a swivel ring according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a centering adjustment plate according to an embodiment of the invention.

Fig. 5 is a schematic front view of a second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a clamping assembly according to a second embodiment of the invention.

Fig. 7 is an enlarged schematic view of a portion a in fig. 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In a first embodiment, referring to fig. 1 to 3, a center frame of a long workpiece processing machine includes: the supporting frame 1 is annular, and the bottom of the supporting frame 1 is welded and fixed on the base 4; three groups of supporting claws 3 are arranged along the center array of the support frame 1 and can move along the radial direction of the support frame 1, the supporting claws 3 adopt a square shaft structure and can limit the rotational freedom degree, one end of each supporting claw 3 is provided with a roller 32, the central shaft of the roller 32 is parallel to the central shaft of the support frame 1, and one end surface of each supporting claw 3 is provided with a thread groove 31; the rotary ring 2 is rotatably installed on one side end face of the support frame 1, specifically, an annular bulge is arranged on the end face of the rotary ring 2, the bulge is embedded into a clamping groove 21 fixedly arranged on the side face of the support frame 1 and can rotate, a plane thread 23 is arranged on the end face of the rotary ring 2, an inclined plane is arranged on the periphery of the plane thread 23, a first inclined tooth groove 22 is arranged on the inclined plane, the plane thread 23 is meshed with a thread groove 31 on the supporting claw 3, when the rotary ring 2 is rotated, the supporting claw 3 is driven to move along the radial direction through the plane thread 23, and the three supporting claws 3 move synchronously, so that the effect of automatic centering adjustment is achieved.

The adjustable ring 6 rotates to be installed on the side of support frame 1, sets up the oblique tooth's socket 61 of second on the adjustable ring 6, the tooth's socket 61 meshes with first oblique tooth's socket 22 of second, and the 6 sides of adjustable ring set up to the hexahedron type the same with the nut shape, can conveniently rotate adjustable ring 6 through the spanner to drive swivel 2 and rotate and adjust.

The base 4 activity sets up on supporting seat 5, and 4 bottom excircles of base set up the external screw thread to install fastening nut 51, be used for unable adjustment base 4, like this when installation or debugging centre frame, the accessible is adjusted the base 4 height and is made it keep coaxial arrangement with the jig center.

As shown in fig. 4, a circular centering adjusting plate 9 is installed on one end face of the support frame 1, the centering adjusting plate 9 is rotatably connected with the support frame 1, and is concentric with the support frame 1 after being turned over, a through hole 91 is formed in the center of the centering adjusting plate 9, when a center frame is installed or debugged, a laser pen can be clamped on a machine tool clamp, and a light beam of the laser pen passes through the through hole 91 to serve as the basis that the center frame and the clamp are coaxial, so that centering adjustment is facilitated.

In the second embodiment, referring to fig. 5, 6, and 7, the difference from the first embodiment is that in this embodiment, the center frame of the long workpiece processing machine further includes a clamping ring 7 located in the supporting frame 1, the clamping ring 7 is formed by two semicircular rings capable of rotating relative to each other, and can be fixed by bolts so as to sleeve the workpiece into the clamping ring, at least four sets of clamping assemblies 8 are disposed in the clamping ring 7, the clamping assemblies 8 are arranged in an annular array, each clamping assembly 8 includes a swing rod 82, a clamping head 83, and a clamping column 81, the clamping head 83 is fixedly connected to the swing rod 82, one end of the swing rod 82 is connected to the clamping ring 7 by a rotating pin, a spiral spring 71 is disposed on the rotating pin, the clamping column 81 is movably disposed in a blind hole in the clamping head 83, the clamping columns 81 are disposed in a plurality of rectangular array, and a compression spring 84 is sleeved on the clamping column 81 in the clamping head 83. When processing non-circular workpieces such as square shafts, the clamping ring 7 is opened and sleeved on the workpiece, the clamping heads 83 are pressed on the surface of the workpiece respectively, the clamping columns 81 are compressed into the clamping heads 83 after contacting with the workpiece by using the action of the plurality of clamping columns 81, the clamping columns 81 which are not contacted with the workpiece are kept in an original state, the clamping columns 81 arranged in an array form grooves with the same shapes as the surface of the workpiece, the surface of the workpiece is embedded in the grooves, the clamping ring 7 is driven to synchronously rotate when the workpiece rotates by using the friction force between the clamping columns 81 and the surface of the workpiece, then the support frame 1 is moved in from the end face of the workpiece, the clamping ring 7 is positioned in the grooves, the adjusting support claws 3 are propped against the excircle of the clamping ring 7, and the clamping ring 7 is contacted and rotated with the rollers 32.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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. A long work machine tool center frame comprising: the device comprises a support frame (1), a rotating ring (2), a supporting claw (3), a base (4), a supporting seat (5), an adjusting ring (6) and a clamping ring (7) positioned in the support frame (1), wherein the support frame (1) is circular, and the bottom of the support frame is welded and fixed on the base (4); three groups of supporting claws (3) are arranged along the center array of the support frame (1) and can move along the radial direction of the support frame (1), one end of each supporting claw (3) is provided with a roller (32), and the central axis of each roller (32) is parallel to the central axis of the support frame (1); the method is characterized in that: the clamping ring (7) is formed by hinging two semicircular rings, at least four groups of clamping components (8) are arranged in the clamping ring (7), the clamping components (8) are arranged in an annular array, each clamping component (8) comprises a swing rod (82), a clamping head (83) and a clamping column (81), the clamping heads (83) are fixedly connected with the swing rods (82), one end of each swing rod (82) is connected with the clamping ring (7) through a rotating pin, a volute spiral spring (71) is arranged on the rotating pin, the clamping columns (81) are movably arranged in blind holes in the clamping heads (83), the clamping columns (81) are arranged in a plurality and are arranged in a rectangular array, and a pressure spring (84) is sleeved on each clamping column (81) in each clamping head (83);

a thread groove (31) is formed in one end face of the supporting claw (3), the rotating ring (2) is rotatably mounted on one side end face of the supporting frame (1), a plane thread (23) is arranged on the end face of the rotating ring (2), an inclined plane is arranged on the periphery of the plane thread (23), a first inclined tooth groove (22) is formed in the inclined plane, and the plane thread (23) is meshed with the thread groove (31) in the supporting claw (3); the end face of the rotating ring (2) is provided with an annular bulge, and the bulge is embedded into a clamping groove (21) fixedly arranged on the side face of the support frame (1).

2. The long workpiece processing machine tool steady rest as claimed in claim 1, wherein: the supporting claw (3) adopts a square shaft structure.

3. The long workpiece processing machine tool steady rest as claimed in claim 1, wherein: the adjusting ring (6) is rotatably arranged on the side face of the support frame (1), a second oblique tooth groove (61) is formed in the adjusting ring (6), and the second oblique tooth groove (61) is meshed with the first oblique tooth groove (22).

4. A long work machine tool steady rest as claimed in claim 3, wherein: the adjusting ring (6) is arranged in a hexahedron shape on the side surface.

5. The steady rest of the long work machine tool of claim 1, wherein: the base (4) is movably arranged on the supporting seat (5), and the outer circle of the bottom end of the base (4) is provided with an external thread and is provided with a fastening nut (51).

6. The steady rest of the long work machine tool of claim 1, wherein: the centering adjusting plate is characterized in that a circular centering adjusting plate (9) is installed on one end face of the supporting frame (1), the centering adjusting plate (9) is rotatably connected with the supporting frame (1), and a through hole (91) is formed in the circle center of the centering adjusting plate (9).