CN112846830A

CN112846830A - Centrifugal center frame for machining long shaft workpieces

Info

Publication number: CN112846830A
Application number: CN202110045779.9A
Authority: CN
Inventors: 李艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-05-28

Abstract

The invention relates to the technical field of shaft machining equipment and discloses a centrifugal center frame for machining long-shaft workpieces. This a centrifugal centre frame for major axis class work piece processing to the setting of fan-shaped groove inner structure for no matter be at anticlockwise rotation in the movable ring frame on this centre frame, still can drive the regulation spheroid in the fan-shaped groove on it and extrude the activity clamp plate to its one side because of the effect of centrifugal force when following the pointer rotation, and then improved the application scope of this centre frame effectively, and the stability and the reliability of this centre frame in the use.

Description

Centrifugal center frame for machining long shaft workpieces

Technical Field

The invention relates to the technical field of shaft machining equipment, in particular to a centrifugal center frame for machining long-shaft workpieces.

Background

The center frame is an essential auxiliary processing device when a machine tool processes longer shaft parts, and when the machine tool processes slender shaft parts, the center frame supports the middle parts of the slender shaft parts so as to resist deflection of the slender shaft parts during fixed processing.

At present, the alignment operation is all required to be carried out before using in current centre frame, and the alignment operation is all operated the completion through the manual work, and then has consumed a large amount of time and has carried out the alignment operation to increased manufacturing procedure and the process time to this type of part, the precision of manual alignment operation is relatively poor moreover, and then it is great at the high-speed rotatory in-process circle run-out error that leads to this major axis type of part, greatly reduced its machining precision to axle type part, stability and reliability are relatively poor.

Disclosure of Invention

Technical problem to be solved

The invention provides a centrifugal center frame for processing long-shaft workpieces, which has the advantages of no need of manually aligning the center frame, effectively improved processing precision of the center frame on slender shaft parts, shortened processing time of the slender shaft parts, higher stability and reliability, and solves the problems that the existing center frame needs to be aligned before being used, the alignment operation is finished through manual operation, and further a large amount of time is consumed for alignment operation, so that the processing procedures and the processing time of the parts are increased, the accuracy of the manual alignment operation is poorer, and further the round runout error of the long-shaft parts in the high-speed rotating process is larger, the processing precision of the parts is greatly reduced, and the stability and the reliability are poorer.

(II) technical scheme

The invention provides the following technical scheme: a centrifugal center frame for processing long-shaft workpieces comprises a base, wherein a supporting ring frame is fixedly arranged at the top end of the base, a movable ring frame is movably sleeved on the outer surface of the supporting ring frame, and the front surface of the movable ring frame is fixedly provided with an outer cover shell, the corresponding positions of the movable ring frame and the inner cavity of the outer cover shell are respectively provided with a group of fan-shaped grooves, the inner cavity of the fan-shaped groove is movably connected with a movable pressure plate, the top end of the movable pressure plate and the top part of the inner cavity of the fan-shaped groove are provided with an adjusting ball body, the middle part of the bottom end of the fan-shaped groove is provided with a straight groove communicated with the inner cavity of the movable ring frame, the middle part of the bottom end of the movable pressing plate is fixedly provided with a fixed rod, the bottom of the fixed rod penetrates into the inner cavity of the movable ring frame along the inner wall of the straight groove and is movably sleeved with an adjusting sleeve, and the inner wall of the adjusting sleeve is in threaded connection with a clamping connecting rod.

Preferably, the bottom end of the fan-shaped groove is provided with a curved surface structure with a circular arc, and the top end of the fan-shaped groove is provided with a gradually-changed curved surface structure with a high middle and two low sides.

Preferably, the cross section of the movable pressure plate is a fan-shaped structure with the same radian as the curved surface structure at the bottom end of the fan-shaped groove.

Preferably, the inside of dead lever is equipped with the same blind hole of internal diameter and joint connecting rod's surface diameter for flexible joint connecting rod is with the slender type axle class part of location different diameters.

Preferably, the cross section of the movable ring frame is of an I-shaped structure, and the movable ring frame is movably sleeved with the support ring frame by a front group of tapered roller bearings and a rear group of tapered roller bearings.

(III) advantageous effects

The invention has the following beneficial effects:

1. this a centrifugal center rest for major axis class work piece processing, through the setting of sector groove and activity clamp plate, so that under the effect of centrifugal force and the cooperation adjustment spheroid extrudees the activity clamp plate downwards, and then make three group's joint connecting rods in this center rest have the trend of extrudeing the axle type part of treating processing downwards at high-speed rotatory in-process, and then realized accomplishing the alignment centre gripping action at its high-speed rotatory in-process is automatic, and do not need artificial alignment operation to it, its manufacturing procedure and the process time to axle type part have been shortened effectively, simultaneously, can ensure that this axle type part can not take place the circumference of a relatively large scale and beat at high-speed rotatory in-process, and then improved its machining precision to axle type part effectively.

2. This a centrifugal centre frame for major axis class work piece processing to the setting of fan-shaped groove inner structure for no matter be at anticlockwise rotation in the movable ring frame on this centre frame, still can drive the regulation spheroid in the fan-shaped groove on it and extrude the activity clamp plate to its one side because of the effect of centrifugal force when following the pointer rotation, and then improved the application scope of this centre frame effectively, and the stability and the reliability of this centre frame in the use.

3. This a centrifugal centre frame for major axis class work piece processing to the setting of activity ring frame exterior structure to in with its inseparable with support between the ring frame activity cup joint, make it can not take place the phenomenon of relative rocking at the rotatory in-process of relative high speed, further improved this centre frame stability and reliability in the operation process, simultaneously, improved this centre frame effectively to the machining precision of slenderness type axle class part.

Drawings

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

FIG. 2 is a side view of the structure of the present invention;

fig. 3 is a front view of the structural mobile ring frame of the present invention.

In the figure: 1. a base; 2. a support ring frame; 3. a movable ring frame; 4. an outer casing; 5. a sector groove; 6. a movable pressing plate; 7. a straight groove; 8. adjusting the ball body; 9. fixing the rod; 10. an adjustment sleeve; 11. the connecting rod is clamped.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a centrifugal center frame for processing long shaft workpieces comprises a base 1, a supporting ring frame 2 is fixedly installed at the top end of the base 1, a movable ring frame 3 is movably sleeved on the outer surface of the supporting ring frame 2, an outer housing 4 is fixedly installed on the front surface of the movable ring frame 3, a group of fan-shaped grooves 5 are respectively arranged at corresponding positions of inner cavities of the movable ring frame 3 and the outer housing 4, an inner cavity of each fan-shaped groove 5 is movably connected with a movable pressing plate 6, an adjusting sphere 8 is arranged at the top end of each movable pressing plate 6 and positioned at the top of the inner cavity of each fan-shaped groove 5, a straight groove 7 communicated with the inner cavity of the movable ring frame 3 is arranged in the middle of the bottom end of each fan-shaped groove 5, a fixed rod 9 is fixedly installed in the middle of the bottom end of each movable pressing plate 6, the bottom end of each fixed rod, the inner wall of the adjusting sleeve 10 is connected with a clamping connecting rod 11 in a threaded manner.

In the technical scheme, the bottom end of the fan-shaped groove 5 is provided with a curved surface structure with a circular radian, and the top end of the fan-shaped groove 5 is provided with a gradually-changed curved surface structure with a high middle and two low sides.

The arrangement of the inner structure of the fan-shaped groove 5 enables the movable ring frame 3 on the center frame to drive the adjusting ball 8 in the fan-shaped groove 5 to extrude the movable pressing plate 6 to one side of the movable ring frame under the action of centrifugal force no matter the movable ring frame rotates anticlockwise or rotates along with the pointer, and therefore the application range of the center frame is effectively enlarged.

In the technical scheme, the cross section of the movable pressing plate 6 is designed into a fan-shaped structure with the same radian as the curved surface structure at the bottom end of the fan-shaped groove 5.

Wherein, to the setting of sector groove 5 and activity clamp plate 6, so that under the effect of centrifugal force and the cooperation adjustment spheroid 8 extrudees activity clamp plate 6 downwards, and then make three group joint connecting rods 11 in this centre frame have the trend of pushing down the axle type part of treating processing at the rotatory in-process of high speed, in order to realize accomplishing the alignment centre gripping action at its rotatory in-process of high speed automatically, and need not artificial alignment operation to it, its manufacturing procedure and the process time to axle type part have greatly been shortened, simultaneously, can ensure that this axle type part can not take place the circumference of great extent at the rotatory in-process of high speed and beat, and then improved its machining precision to axle type part effectively.

In the technical scheme, a blind hole with the same inner diameter as the diameter of the outer surface of the clamping connecting rod 11 is formed in the fixing rod 9 and used for stretching and retracting the clamping connecting rod 11 to position slender shaft parts with different diameters.

In the technical scheme, the cross section of the movable ring frame 3 is designed to be of an I-shaped structure, and the movable ring frame and the support ring frame 2 are movably sleeved by a front group of tapered roller bearings and a rear group of tapered roller bearings.

Wherein, to the setting of 3 external structure of activity ring frames to in with its inseparable with support ring frame 2 between carry out the activity and cup joint, make its in-process that rotates at relative high speed can not take place the phenomenon of rocking relatively, further improved the stability and the reliability of this centre frame in the operation process, simultaneously, improved its machining precision to axle type part.

The use method and the working principle of the embodiment are as follows:

firstly, the center frame is fixedly arranged on a tailstock of a lathe, then one end of a shaft part is fixed on a three-jaw chuck of the center frame, the other end of the shaft part penetrates through three groups of clamping connecting rods 11 on the center frame, simultaneously three groups of adjusting sleeves 10 on the center frame are rotated and displaced by the same distance, the bottom ends of the three groups of clamping connecting rods 11 are respectively ensured to be contacted with the outer surface of the shaft part, then the lathe is started, the movable ring frame 3 on the center frame is driven to rotate along with the shaft part under the transmission action, simultaneously, an adjusting sphere 8 in a fan-shaped groove 5 on the movable ring frame 3 is subjected to centrifugal force action due to high-speed rotation, so that the adjusting sphere has the tendency of moving to the rotating side along the track of the top of the fan-shaped groove 5, and further has the tendency of downwards extruding a movable pressing plate 6, and drives a fixed rod 9 on the adjusting sphere to downwards, the central axis of the shaft part clamped on the central axis is consistent with the rotation center of the lathe spindle, so that the time of manually aligning when the central frame is used is reduced, the machining precision of the shaft part by the central frame is improved, and the stability and the reliability are high.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a centrifugal centre frame for processing of major axis class work piece, includes base (1), the top fixed mounting of base (1) has support ring frame (2), movable ring frame (3) have been cup jointed in the surface activity of support ring frame (2), and the positive fixed mounting of movable ring frame (3) has outer housing (4), its characterized in that: a group of fan-shaped grooves (5) are respectively formed in the corresponding positions of the inner cavities of the movable ring frame (3) and the outer housing (4), a movable pressing plate (6) is movably connected to the inner cavity of each fan-shaped groove (5), an adjusting ball body (8) is arranged at the top of the movable pressing plate (6) and at the top of the inner cavity of each fan-shaped groove (5), a straight groove (7) communicated to the inner cavity of the movable ring frame (3) is formed in the middle of the bottom end of each fan-shaped groove (5), a fixing rod (9) is fixedly installed in the middle of the bottom end of the movable pressing plate (6), an adjusting sleeve (10) penetrates through the inner cavity of the movable ring frame (3) along the inner wall of the straight groove (7) and is movably sleeved with the bottom end of the fixing rod (9), and a clamping connecting.

2. A centrifugal center frame for long-axis type workpiece processing according to claim 1, wherein: the bottom end of the fan-shaped groove (5) is provided with a curved surface structure with a circular radian, and the top end of the fan-shaped groove (5) is provided with a gradually-changed curved surface structure with a high middle and two low sides.

3. A centrifugal center frame for long-axis type workpiece processing according to claim 2, wherein: the cross section of the movable pressing plate (6) is of a fan-shaped structure with the same radian as the curved surface structure at the bottom end of the fan-shaped groove (5).

4. A centrifugal center frame for long-axis type workpiece processing according to claim 1, wherein: the inside of dead lever (9) is equipped with the same blind hole of internal diameter and joint connecting rod (11)'s surface diameter for flexible joint connecting rod (11) is with the slender type axle class part of the different diameters of location.

5. A centrifugal center frame for long-axis type workpiece processing according to claim 1, wherein: the cross section of the movable ring frame (3) is designed to be of an I-shaped structure, and the movable ring frame is movably sleeved with the support ring frame (2) by a front group of tapered roller bearings and a rear group of tapered roller bearings.