CN-118219020-B - Machine tool center bracket and use method

CN118219020BCN 118219020 BCN118219020 BCN 118219020BCN-118219020-B

Abstract

The invention discloses a central bracket of a machine tool and a use method of the central bracket, the central bracket comprises an annular frame and a plurality of supporting components arranged on the annular frame, the supporting components are used for supporting workpieces positioned on the inner side of the annular frame, each supporting component comprises a sleeve, a main supporting claw and two auxiliary supporting claws, the sleeve is integrally arranged on the annular frame, a first adjusting component is arranged on the sleeve, the main supporting claw is movably sleeved in the sleeve, the first adjusting component is used for adjusting the position of the main supporting claw in the sleeve, a telescopic piece is arranged in one end of the main supporting claw facing the center of the annular frame, a first roller is movably arranged at the far end of the telescopic piece, a second adjusting component is arranged in the main supporting claw, the two auxiliary supporting claws are movably and symmetrically arranged on two sides of the main supporting claw, the second adjusting component is used for synchronously adjusting an included angle between the two auxiliary supporting claws and the main supporting claw, and the far ends of the two auxiliary supporting claws are respectively and movably provided with a second roller. In a word, the invention has the advantages of novel structure, convenient use, safety, stability and the like.

Inventors

REN JINWU
HUANG YANMING
ZHU QINGJIE
Tian Mingjuan
MA PENGHU
WU XIAOQIANG
YANG HONGFENG
Ou Xinguo
YANG XING
SHI YONGJUN

Assignees

陕西国华基业科工贸有限公司

Dates

Publication Date: 20260508
Application Date: 20240511

Claims (5)

1. A machine tool centre rest comprising a ring frame (1) and a plurality of support members (2) arranged on the ring frame (1), the support members (2) being arranged to support a workpiece (3) located inside the ring frame (1), characterized in that each support member (2) comprises: The sleeve (21) is integrally arranged on the annular frame (1), the axis of the sleeve (21) faces to the center of the annular frame (1), and a first adjusting component (211) is arranged on the sleeve (21); The main supporting claw (22) is movably sleeved in the sleeve (21), the first adjusting component (211) is used for adjusting the position of the main supporting claw (22) in the sleeve (21), a telescopic piece (221) is arranged in one end of the main supporting claw (22) facing the center of the annular frame (1), a first roller (222) is movably arranged at the far end of the telescopic piece (221), and a second adjusting component (223) is arranged in the main supporting claw (22); The two auxiliary supporting claws (23) are movably and symmetrically arranged at two sides of the main supporting claw (22), the second adjusting component (223) is used for synchronously adjusting the included angle between the two auxiliary supporting claws (23) and the main supporting claw (22), and the far ends of the two auxiliary supporting claws (23) are respectively and movably provided with a second roller (231); a monitoring assembly for monitoring the temperature of the first roller (222) and the second roller (231), respectively; the control assembly is respectively connected with the monitoring assembly, the first adjusting assembly (211), the telescopic piece (221) and the second adjusting assembly (223); the first adjustment assembly (211) comprises: A bearing (2111) coaxially and fixedly arranged inside the outer end of the sleeve (21); One end of the adjusting screw rod (2112) is fixedly sleeved in the bearing (2111), and an adjusting seat (2113) is fixedly arranged at one end of the adjusting screw rod (2112) close to the bearing (2111); the limiting groove (2114) is arranged on the inner side surface of the sleeve (21); The limiting jackscrews (2115) are arranged on the side face of the sleeve (21) in a penetrating mode, and the limiting jackscrews (2115) are used for loosening or locking the main supporting claws (22); The main holding claw (22) comprises: A connecting section (224) provided with a spiral groove (2241) inside, wherein the adjusting screw (2112) is screwed with the spiral groove (2241); The supporting section (225) is integrally arranged at one end of the connecting section (224) deviating from the spiral groove (2241), the telescopic piece (221) and the second adjusting component (223) are respectively arranged inside the supporting section (225), and an installation groove (2251) is formed in the side face of the supporting section (225); the limiting strip (226) is arranged on the side surfaces of the connecting section (224) and the bearing section (225), and the limiting strip (226) is movably embedded with the limiting groove (2114) and used for limiting the rotation of the main bearing claw (22); the auxiliary holding claw (23) comprises: One end of the arc arm (232) is movably arranged in the mounting groove (2251) through a pin shaft (233), and a toothed ring (234) is arranged at one end of the arc arm (232) close to the pin shaft (233); Two support arms (235) which are fixedly arranged at the other end of the arc arm (232) at intervals, wherein the distal end of each support arm (235) is respectively provided with a second roller (231); the second adjustment assembly (223) comprises: -a hydraulic telescopic rod (2231) arranged inside the support section (225), the hydraulic telescopic rod (2231) being connected to the control assembly; the rack (2232) is arranged on two sides of the telescopic end of the hydraulic telescopic rod (2231), the rack (2232) is respectively arranged on two sides of the telescopic end of the hydraulic telescopic rod, and the rack (2232) is meshed with the gear ring (234).
2. A machine tool center bracket according to claim 1, wherein the ring frame (1) comprises a lower ring frame (11) and an upper ring frame (12), the lower ring frame (11) and the upper ring frame (12) are semicircular frames, the lower ring frame (11) is movably hinged with one end of the upper ring frame (12), the other end of the lower ring frame is locked by a locking member, and the sleeve (21) is respectively arranged on the lower ring frame (11) and the upper ring frame (12).
3. A machine tool centre rest according to claim 2, characterized in that the bottom of the ring frame (1) is provided with a fixing base (4), the fixing base (4) comprising: the support frame (41) is connected and arranged below the lower ring frame (11); The fixed screw rod (42) is arranged in the middle of the supporting frame (41) in a penetrating mode, and a fixed nut (43) is screwed on the fixed screw rod (42) positioned at the upper part of the supporting frame (41); and the fixed plate (44) is fixedly arranged at the lower end of the fixed screw rod (42).
4. A machine tool centre rest according to claim 3, characterized in that the support frame (41) is connected to the lower ring frame (11) by means of an adjustment telescopic rod (45), the adjustment telescopic rod (45) being used for adjusting the height of the ring frame (1).
5. A method of using a machine tool center rest according to claim 4, comprising the steps of: Placing a fixed base (4) on a machine tool track, clamping a fixed plate (44) below the track, rotating a fixed nut (43), adjusting the length of the lower part of a fixed screw rod (42), enabling the fixed plate (44) to be fixedly clamped below the track, enabling the fixed base (4) to be fixed on the machine tool track, opening an upper ring frame (12), clamping a workpiece (3) on a machine tool chuck, enabling the workpiece (3) to penetrate through the inner side of the ring frame (1), closing the upper ring frame (12) and locking, and adjusting the height of the ring frame (1) through an adjusting telescopic rod (45), so that the center of the ring frame (1) coincides with the center of the workpiece (3); The adjusting screw rod (2112) is driven to rotate through the rotating adjusting seat (2113), so that the position of the main supporting claw (22) in the sleeve (21) is adjusted, a plurality of first rollers (222) are propped against the surface of the workpiece (3), then the position of the main supporting claw (22) is locked through the limiting jackscrew (2115), and the machine tool is started to drive the workpiece (3) to rotate; When the workpiece (3) is rotationally processed, the surface of the workpiece (3) is in contact friction with the first roller (222) to generate heat, the monitoring component can monitor the temperature of the first roller (222) in real time, when the temperature exceeds a set threshold value, the monitoring component can send a signal to the control component, at the moment, the control component controls the hydraulic telescopic rod (2231) to stretch, and the arc arm (232) of the auxiliary supporting claw (23) is driven to rotate around the pin shaft (233) through the meshing of the rack (2232) and the toothed ring (234), so that the second roller (231) is abutted against the surface of the workpiece (3), then the hydraulic telescopic rod (2231) is locked, and the control component controls the telescopic piece (221) to drive the first roller (222) to retract, so that the first roller (222) is in contact with the surface of the workpiece (3) in a releasing mode; When the to-be-monitored component monitors that the temperature of the second roller (231) exceeds the set threshold value, the first roller (222) is replaced to be in contact with the surface of the workpiece (3), the first roller (222) and the second roller (231) work alternately, and the damage to the workpiece (3), the first roller (222) and the second roller (231) caused by high temperature is avoided while the supporting of the workpiece (3) is not influenced.

Description

Machine tool center bracket and use method Technical Field The invention belongs to the technical field of engineering equipment, and particularly relates to a machine tool center bracket and a using method thereof. Background A machine tool center bracket is a device for fixing a machined workpiece, and is usually installed at the center of a spindle of a machine tool. The device has the functions of supporting the workpiece, keeping the workpiece stable in the processing process and ensuring the processing precision and quality of the workpiece. The center bracket is generally composed of a center bracket and two supports symmetrically distributed on both sides of the center bracket. The center rest and support are typically adjustable to accommodate workpieces of different sizes and shapes. The function of the centre bracket is particularly important in turning. When the length of the workpiece is greater than 25 times the diameter, bending and vibration may be generated due to the deterioration of the rigidity of the workpiece, and the center bracket may effectively support the workpiece and reduce vibration, improving the machining accuracy and stability. However, as the supporting piece of the center bracket needs to be in contact with the surface of the workpiece, friction exists at the contact position of the supporting piece and the surface of the workpiece when the workpiece rotates, and a large amount of friction heat can be generated at the contact position under the influence of the rotating speed and time, the stress of the surface of the workpiece can be influenced, and the service life of the supporting piece can be also influenced. At present, substances such as lubricating oil and the like are sprayed to friction contact parts continuously to conduct lubricating and cooling in the prior art, and compared with the way of consuming cooling substances, the method increases the use cost. Disclosure of Invention In view of the above problems, an object of the present invention is to provide a machine tool center rest and a method of use. The technical scheme of the invention is that the machine tool center bracket comprises an annular frame and a plurality of bearing assemblies arranged on the annular frame, wherein the bearing assemblies are used for bearing workpieces positioned on the inner side of the annular frame, and each bearing assembly comprises: The sleeve is integrally arranged on the annular frame, the axis of the sleeve faces to the center of the annular frame, and a first adjusting component is arranged on the sleeve; the main supporting claw is movably sleeved in the sleeve, the first adjusting component is used for adjusting the position of the main supporting claw in the sleeve, a telescopic piece is arranged in one end of the main supporting claw, which faces the center of the annular frame, the far end of the telescopic piece is movably provided with a first roller, and the inside of the main supporting claw is provided with a second adjusting component; the two auxiliary supporting claws are movably and symmetrically arranged at two sides of the main supporting claw, the second adjusting component is used for synchronously adjusting the included angle between the two auxiliary supporting claws and the main supporting claw, and the far ends of the two auxiliary supporting claws are respectively and movably provided with a second roller; The monitoring component is used for respectively monitoring the temperatures of the first roller and the second roller; and the control assembly is respectively connected with the monitoring assembly, the first adjusting assembly, the telescopic piece and the second adjusting assembly. Further, the first adjustment assembly includes: the bearing is coaxially and fixedly arranged on the inner side of the outer end of the sleeve; one end of the adjusting screw rod is fixedly sleeved in the bearing, and one end of the adjusting screw rod, which is close to the bearing, is fixedly provided with an adjusting seat; the limiting groove is arranged on the inner side surface of the sleeve; the limiting jackscrews are arranged on the side face of the sleeve in a penetrating mode and used for loosening or locking the main supporting claws. Further, the main holding claw includes: the connecting section is internally provided with a spiral groove, and the adjusting screw rod is screwed with the spiral groove; The supporting section is integrally arranged at one end of the connecting section, which is away from the spiral groove, the telescopic piece and the second adjusting component are respectively arranged inside the supporting section, and the side surface of the supporting section is provided with a mounting groove; the limiting strip is arranged on the side surfaces of the connecting section and the bearing section, and is movably embedded with the limiting groove and used for limiting the main bearing claw to rotate. Further, the sub-holding claw