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CN-118268929-B - Automatic indexing device based on subdivision multi-tooth indexing table

CN118268929BCN 118268929 BCN118268929 BCN 118268929BCN-118268929-B

Abstract

The invention belongs to the technical field of precision machining and measurement, and relates to an automatic indexing device based on a subdivision multi-tooth indexing table. The device is characterized by comprising a subdivision multi-tooth indexing table (5), wherein one side surface of the subdivision multi-tooth indexing table (5) is connected with a subdivision driving mechanism (1), the other side surface of the subdivision multi-tooth indexing table (5) is connected with a coarse-division driving mechanism (3) and a lifting driving mechanism (4), a connecting plate (2) is arranged at the bottom of the subdivision multi-tooth indexing table (5), and the subdivision multi-tooth indexing table is fixedly arranged on the upper surface of a workbench (6) through the connecting plate (2). The automatic indexing device has the advantages of realizing automatic indexing at any angle, along with simple structure, good reliability and improved measurement precision and efficiency.

Inventors

  • Ling siying
  • ZHANG LEI
  • ZHANG JIAYANG
  • YE KANG
  • GONG HAIFENG
  • WANG FENGTAO

Assignees

  • 汕头大学

Dates

Publication Date
20260505
Application Date
20240412

Claims (7)

  1. 1. An automatic indexing device based on a subdivision multi-tooth indexing table is characterized by comprising the subdivision multi-tooth indexing table (5), wherein one side surface of the subdivision multi-tooth indexing table (5) is connected with a subdivision driving mechanism (1); the other side surface of the subdivision multi-tooth indexing table (5) is connected with a coarse-scale driving mechanism (3) and a lifting driving mechanism (4); the subdivision drive mechanism (1) comprises a subdivision drive motor (1-1), wherein the subdivision drive motor (1-1) is arranged on a subdivision drive motor bracket (1-2); The subdivision driving motor bracket (1-2) is provided with a dense-bead cross slide block coupler (1-3); The subdivision driving motor bracket (1-2) is fixed on the workbench (6); The subdivision driving motor (1-1) is connected with one end of the dense ball cross slide block coupler (1-3) through a shaft; The other end of the dense bead cross slide block coupler (1-3) is connected with a subdivision hub (5-1) of the subdivision multi-tooth indexing table in a shaft way, and the dense bead cross slide block coupler (1-3) can realize no return difference rotation and relative axial movement of a main shaft of a subdivision driving motor (1-1) and the subdivision hub (5-1) of the subdivision multi-tooth indexing table; The dense bead cross slide block coupler (1-3) comprises a guide sleeve (1-3-1), wherein a positioning dense bead (1-3-2) and a movable dense bead (1-3-3) are arranged in the guide sleeve (1-3-1); The positioning dense beads (1-3-2) are arranged in holes on the side wall of the positioning dense bead sleeve, and the movable dense beads (1-3-3) are arranged in holes on the side wall of the movable dense bead sleeve; a subdivision driving motor connecting shaft (1-3-4) is arranged in the positioning dense bead sleeve, a subdivision hub connecting shaft (1-3-6) is arranged in the movable dense bead sleeve, and a dense bead frame (1-3-5) is arranged at one end of the subdivision hub connecting shaft (1-3-6); the coarse indexing driving mechanism (3) comprises an indexing driving motor bracket (3-1), the indexing driving motor bracket (3-1) is connected with a connecting plate (2), and the connecting plate (2) is connected with a workbench (6); an indexing driving motor (3-3) is arranged on the indexing driving motor bracket (3-1), and an output shaft of the indexing driving motor (3-3) is connected with a driving synchronous pulley (3-2); A synchronous belt (3-4) is arranged on the driving synchronous belt wheel (3-2), and the synchronous belt (3-4) is connected with the driven synchronous belt wheel (3-5); The indexing driving motor (3-3) is fixedly connected with the indexing driving motor bracket (3-1) through screws, and the driven synchronous pulley (3-5) is arranged on the ring surface of the subdivision multi-tooth indexing table (5).
  2. 2. The automatic indexing device for the subdivision multi-tooth indexing table according to claim 1, wherein the subdivision driving motor (1-1), the dense ball cross slide coupling (1-3) and the subdivision hub (5-1) of the subdivision multi-tooth indexing table are located on the same axis.
  3. 3. The automatic indexing device for the subdivision multi-tooth indexing table according to claim 2, wherein the positioning dense beads (1-3-2) and the guide sleeve (1-3-1) are assembled together in an interference fit manner, and the subdivision driving motor connecting shaft (1-3-4) is in interference fit with the dense bead frame (1-3-5) and the subdivision hub connecting shaft (1-3-6); the movable dense beads (1-3-3) are in interference fit with the subdivision hub connecting shaft (1-3-6), and the subdivision hub connecting shaft (1-3-6) is in interference fit with the guide sleeve (1-3-1); the axis of the output shaft of the subdivision driving motor (1-1) is coaxial with the axis of the subdivision hub (5-1) of the subdivision multi-tooth indexing table.
  4. 4. The automatic indexing device for subdividing a multi-tooth indexing table according to claim 3, wherein the lifting driving mechanism (4) includes a lifting driving motor (4-1), and the lifting driving motor (4-1) is disposed on the lifting driving motor adapter plate (4-2); The lifting driving motor adapter plate (4-2) is fixedly connected with a lifting driving motor bracket (4-3); An output shaft of the lifting driving motor (4-1) is connected with a lifting shaft (5-3) of the subdivision multi-tooth indexing table through a coupler (4-4); the lifting driving motor bracket (4-3) is connected with the connecting plate (2) through bolts.
  5. 5. The automatic indexing device for a finely divided multi-tooth indexing table according to claim 1 or 4, wherein the flatness of the table top of the finely divided multi-tooth indexing table (5) is <1 μm and the parallelism with respect to the indexing plane is less than or equal to 2 μm.
  6. 6. The automatic indexing device for subdividing a multi-tooth indexing table according to claim 5, wherein the number of pulses of the subdivision driving motor (1-1) is greater than or equal to 300.
  7. 7. The automatic indexing device for subdividing a multi-tooth indexing table according to claim 6, wherein the number of pulses of the subdivision driving motor (1-1) is 350.

Description

Automatic indexing device based on subdivision multi-tooth indexing table Technical Field The invention belongs to the technical field of precision machining and measurement, and relates to an automatic indexing device based on a subdivision multi-tooth indexing table. Background The subdivision multi-tooth indexing table is a high-precision angle reference instrument widely used in the machining and measuring fields. The multi-tooth indexing table utilizes the multi-tooth average effect, so that the multi-tooth indexing table has good positioning precision and indexing precision which are far higher than those of a turntable, can be used as an angle reference for measurement and an indexing device for precision machining, and is widely applied to scientific research production units. The multi-tooth indexing table is a high-precision angle measuring tool consisting of two end face toothed discs with the same outer diameter, tooth shape and tooth distance, wherein the end face teeth are arranged on the lower end face of the upper toothed disc and the upper end face of the lower toothed disc, the tooth shape is trapezoid, and when the end face teeth of the upper toothed disc and the lower toothed disc enter into meshing, the upper toothed disc and the lower toothed disc are automatically centered. When the indexing mechanism is used, the lower fluted disc is generally fixed, the upper fluted disc is disengaged from the lower fluted disc after being lifted, the upper fluted disc can rotate relative to the lower fluted disc, the upper fluted disc descends after the rotation, and the indexing purpose can be achieved according to the number of teeth after the upper fluted disc is meshed again. The general precision of the existing domestic multi-tooth indexing table can reach 0.5'', and the precision of the high-precision multi-tooth indexing table can reach 0.2''. The invention patent [ CN202310811072.3 ] discloses a subdivision adjusting mechanism, which has the characteristics of continuous subdivision, high indexing accuracy, convenient operation and the like. On the basis of the indexing table, the invention patent [ CN202211463009.7 ] discloses a finely-divided multi-tooth indexing table which can realize arbitrary angle indexing while maintaining the indexing precision of the multi-tooth indexing table. The subdivision multi-tooth indexing table not only can be used together with a combined clamp element, but also can be independently used for general machine tool processing such as drilling, milling, planing, boring, grinding and the like of precision parts with high angle requirements. The integral dividing precision of the domestic existing subdivision multi-tooth dividing table can reach 0.2', and the comprehensive dividing precision can reach 1'. During operation, the fluted disc on the multi-tooth indexing table is lifted and rotated to the required integer degree, then is lowered to be meshed with the lower fluted disc again, and is rotated to the minute and second positions of the required degree through the subdivision driving mechanism. The traditional subdivision multi-tooth indexing table adopts a manual mode to realize the lifting and indexing of the multi-tooth indexing table and the rotation of the subdivision driving mechanism. The scheme is complex in operation, and errors are possibly caused by manually lifting and rotating the multi-tooth indexing table, so that faults such as tooth ejection, tooth staggering and locked rotation are caused, further, the angle output or measurement accuracy of the multi-tooth indexing table is reduced, and even the mechanical structure of the multi-tooth indexing table is damaged when serious, so that serious loss is caused. The multi-tooth indexing table based on program control in the prior art can realize full-automatic measurement, is convenient to operate, saves time, can reduce errors caused by manual operation, but can only realize integral angle positioning and cannot realize indexing at any angle. The invention patent [ CN202311475440.8 ] discloses a grating-based multi-tooth indexing table control device, which can acquire real-time angle values of a multi-tooth indexing table through a grating to realize closed-loop control, can effectively avoid interference to angle output or measurement of an electric field, a magnetic field, a force field and the like, so as to reduce the failure rate and maintainability of the multi-tooth indexing table, improve the angle output or measurement precision of the multi-tooth indexing table, but can only realize integral angle positioning, the minimum indexing angle is (360/fluted disc number) °, indexing cannot be performed, and the manufacturing cost is too high. At present, the domestic sensor test needs to be subjected to high-precision small-angle subdivision near a specific angle position, the angle of the sensor is not necessarily divided by 360 degrees, and the existing multi-tooth indexing table cann