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CN-121989369-A - Digit control machine tool is used in production of 3D curved graphite mould that heats

CN121989369ACN 121989369 ACN121989369 ACN 121989369ACN-121989369-A

Abstract

The application relates to the technical field of graphite mold processing equipment, and discloses a numerical control machine tool for producing a 3D hot-bending graphite mold, which comprises a machine body, wherein a separable transmission device and a rotary table are arranged in the machine body, the separable transmission device comprises a first pipe body, the interior of the first pipe body is rotationally connected with a telescopic shaft, the telescopic shaft is driven to rotate by a cutting driving motor arranged in a driving equipment box, and a plurality of milling cutter fixing devices distributed in a circumferential array and milling cutters in different sizes and styles are fixedly arranged at the outer edge of the bottom of the rotary table. Through the structural design of the telescopic shaft in the detachable transmission device, a plurality of milling cutter fixing devices are arranged at the outer edge of the cooperation turntable, milling cutters of different sizes and styles are respectively arranged on the transmission rotating shaft in each milling cutter fixing device, and one milling cutter right below the milling cutter fixing devices is ejected by utilizing the extension of the telescopic shaft.

Inventors

  • WU WEI
  • HU PEI
  • HONG YING
  • CHEN LIN
  • HUANG XUWEN

Assignees

  • 华尔拓(江西)精密制造有限公司

Dates

Publication Date
20260508
Application Date
20260211

Claims (10)

  1. 1. The numerical control machine tool for producing the 3D hot-bending graphite mold comprises a machine body, wherein a triaxial moving device is arranged in the machine body, and the numerical control machine tool is characterized in that a driving equipment box is fixedly arranged on the triaxial moving device, and a detachable transmission device and a rotary table are arranged at the bottom of the driving equipment box; The separable transmission device comprises a first pipe body, wherein the interior of the first pipe body is rotationally connected with a telescopic shaft, and the telescopic shaft is driven to rotate by a cutting driving motor arranged in a driving equipment box; The rotary table is positioned below the first pipe body and driven to rotate by a servo motor arranged in the driving equipment box, a plurality of milling cutter fixing devices distributed in a circumferential array are fixedly arranged at the outer edge of the bottom of the rotary table, each milling cutter fixing device comprises a second pipe body, a transmission rotating shaft is rotatably connected inside the second pipe body, and milling cutters with different sizes and different styles are fixedly connected at the bottom end of the transmission rotating shaft in each milling cutter fixing device; when the cutter is used, one of the milling cutters is driven to rotate to the position right below the first pipe body through the rotary disc, the milling cutter is ejected out of the bottom end of the second pipe body through the downward extension of the telescopic shaft, and the cutting driving motor is driven to rotate through the transmission of the telescopic shaft and the transmission rotary shaft so as to cut the graphite die fixed in the machine body.
  2. 2. The numerical control machine for producing the 3D hot-bending graphite mold according to claim 1, wherein the telescopic shaft is composed of a positioning transmission shaft and a movable transmission shaft, the top end of the positioning transmission shaft is fixedly connected with an output rotation shaft of the cutting driving motor, a key sliding groove is formed in the middle of the top end of the movable transmission shaft, and the key sliding groove is connected with a bottom end sliding key of the positioning transmission shaft.
  3. 3. The numerical control machine tool for producing the 3D hot-bending graphite mold according to claim 2, wherein a lower sliding sleeve and an upper sliding sleeve are movably sleeved in the first pipe body, the lower sliding sleeve is positioned below the upper sliding sleeve, a bearing sleeve is fixedly installed between the lower sliding sleeve and the upper sliding sleeve, the outer side of the bearing sleeve is not contacted with the inner side of the first pipe body, the bearing sleeve is sleeved with the movable transmission shaft through a bearing, and at least two bearings between the bearing sleeve and the movable transmission shaft are respectively arranged up and down.
  4. 4. The numerical control machine tool for producing the 3D hot-bending graphite mold according to claim 3, wherein two symmetrically arranged guide grooves are formed in the upper half portion of the first pipe body, two linkage rods are fixedly connected to the top of the upper sliding sleeve, one ends of the two linkage rods, far away from the upper sliding sleeve, extend out of the first pipe body through the two guide grooves respectively, two servo cylinders are fixedly arranged on the top of the driving equipment box, and piston shafts of the two servo cylinders are fixedly connected with one ends, far away from the upper sliding sleeve, of the linkage rods respectively.
  5. 5. The numerical control machine tool for producing the 3D hot-bending graphite mold according to claim 3, wherein the bottom of the movable transmission shaft is provided with a slot, the slot is a hexagonal slot, and the top end of the transmission shaft is of a hexagonal prism structure design matched with the slot.
  6. 6. The numerical control machine for producing the 3D hot-bending graphite mold according to claim 5, wherein the notch of the lower half part of the slot is uniformly reduced from bottom to top.
  7. 7. The numerical control machine tool for producing the 3D hot-bending graphite mold according to claim 3, wherein a sliding sleeve is movably sleeved on the inner side of the second pipe body, the inner side of the sliding sleeve is connected with the outer side of the transmission rotating shaft through a bearing, at least two bearings are arranged between the sliding sleeve and the transmission rotating shaft, a positioning ring is fixedly arranged at the bottom end of the second pipe body, and a spring movably sleeved on the outer side of the transmission rotating shaft is arranged between the positioning ring and the sliding sleeve.
  8. 8. The numerical control machine tool for producing the 3D hot-bending graphite mold according to claim 7, wherein a linkage rotating shaft is fixedly arranged at the bottom end of the servo motor, the bottom end of the linkage rotating shaft is fixedly connected with a rotary table, a rubber ring is fixedly arranged at the bottom of the first pipe body, one side of the first pipe body is communicated with an air duct close to the bottom end of the first pipe body, a plurality of upper air guide grooves distributed in a circumferential array are formed in the outer edges of the lower sliding sleeve and the rubber ring, the upper air guide grooves are communicated with outer side cavities of the separable transmission device, lower air guide grooves with the same number as the upper air guide grooves are formed in the second pipe body and the positioning ring, and middle air guide grooves communicated with the lower air guide grooves are formed in the rotary table.
  9. 9. The numerical control machine for producing the 3D hot-bending graphite mold according to claim 8, wherein two limiting plates are fixedly installed on the outer side of the first pipe body, one limiting plate is arranged at the bottom of the driving equipment box, the other limiting plate is arranged at the top of the turntable, and the two limiting plates are sleeved with the linkage rotating shaft through bearings.
  10. 10. The numerical control machine for producing the 3D hot-bending graphite mold according to claim 9, wherein one end of the two limiting plates, which is far away from the linkage rotating shaft, is fixedly sleeved with an exhaust pipe, one end of the exhaust pipe faces the bottom end of the milling cutter positioned below the first pipe body, and the other end of the exhaust pipe is communicated with an extraction opening of the negative pressure pump.

Description

Digit control machine tool is used in production of 3D curved graphite mould that heats Technical Field The application relates to the technical field of graphite mold processing equipment, in particular to a numerical control machine tool for producing a 3D hot-bending graphite mold. Background The 3D hot bending graphite mold is a special mold which adopts high-purity isostatic pressing graphite as a base material and is used for heating and softening plate glass in a high-temperature environment and then pressing the plate glass into a 3D curved surface shape, and mainly comprises a male mold, a female mold, a push plate and other parts, and is usually matched with the male mold, and the graphite mold is required to be used for machining a complex free curved surface in a multi-axis linkage manner by a numerical control machine tool in order to meet the ultra-precise size and curved surface precision requirements of the mold during production. Because the 3D hot-bending graphite mold generally needs to be processed by milling cutters with different sizes and styles in the processing process, such as rough machining, allowance removing, semi-finishing, profile trimming, finishing, precision guaranteeing and the processing of complex structures such as curved surfaces, deep cavities, narrow grooves, round corners of the adaptive mold, however, the time for replacing the milling cutters in the cutting process of the 3D hot-bending graphite mold is slower by the conventional common numerical control machine tool, the production efficiency of the 3D hot-bending graphite mold is affected, and the conventional numerical control machine tool with the milling cutters replaced is realized by adopting a mode of directly clamping or releasing the milling cutters by adopting a clamping device, so that the movable setting of the clamping device structure is poor, the stability after clamping the milling cutters is poor, and the capability of resisting reactive force is weak during cutting, so that the processing precision of a graphite grinding tool is easily affected. Disclosure of Invention The application provides a numerical control machine tool for producing a 3D hot-bending graphite die, which has the advantages of high efficiency and good machining quality of the graphite die, and is used for solving the problems that the existing common numerical control machine tool is troublesome in milling cutter replacement and the existing numerical control machine tool with milling cutter replacement is poor in milling cutter stability caused by adopting a mode of directly clamping or releasing the milling cutter by a clamping device. In order to achieve the purpose, the numerical control machine tool for producing the 3D hot-bending graphite die comprises a machine body, wherein a triaxial moving device is arranged in the machine body, a driving equipment box is fixedly arranged on the triaxial moving device, and a detachable transmission device and a rotary table are arranged at the bottom of the driving equipment box. The detachable transmission device comprises a first pipe body, the interior of the first pipe body is rotationally connected with a telescopic shaft, and the telescopic shaft is driven to rotate by a cutting driving motor arranged in a driving equipment box. The carousel is located the below of first body, and the carousel is rotated by the servo motor drive that sets up in the drive arrangement case, and the outward flange fixed mounting of carousel bottom has a plurality of circumference array distribution's milling cutter fixing device, milling cutter fixing device includes the second body, and the inside rotation of second body is connected with the transmission pivot, and the bottom of the transmission pivot in every milling cutter fixing device is the milling cutter of different sizes and styles fixedly connected with respectively. When the cutter is used, one of the milling cutters is driven to rotate to the position right below the first pipe body through the rotary disc, the milling cutter is ejected out of the bottom end of the second pipe body through the downward extension of the telescopic shaft, and the cutting driving motor is driven to rotate through the transmission of the telescopic shaft and the transmission rotary shaft so as to cut the graphite die fixed in the machine body. Further, the telescopic shaft comprises location transmission shaft and movable transmission shaft, and the top of location transmission shaft and the output pivot fixed connection of cutting driving motor, key spout has been seted up at the middle part on movable transmission shaft top, and key spout is connected with the bottom feather key of location transmission shaft, when driving the rotation of movable transmission shaft through cutting driving motor drive location transmission shaft, still makes movable transmission shaft can reciprocate relative to the location transmission shaft to the bottom of contro