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CN-224209218-U - Split indexable gear milling cutter

CN224209218UCN 224209218 UCN224209218 UCN 224209218UCN-224209218-U

Abstract

Split indexable gear milling cutter. It relates to a cylindrical gear machining tool. The milling cutter solves the problems that the traditional gear milling cutter blank is round cake-shaped, a large part of processing is required to consume large manpower, material resources and financial resources, and the raw material waste can be effectively solved in a split type. The cutter body of the utility model is of a circular structure, and the gear ring is connected with the transmission positioning body by the expandable key block and the expansion screw. The utility model can better make up the defect of original cutter processing, saves materials, can replace materials with higher cost performance by installing the transmission positioning part, improves the processing performance of the indexable gear milling cutter, saves the cost of the cutter body and reduces the resource waste.

Inventors

  • YANG YONGDE
  • HUANG XIN

Assignees

  • 哈尔滨山纳工具制造有限公司

Dates

Publication Date
20260508
Application Date
20250417

Claims (7)

  1. 1. The split indexable gear milling cutter consists of a transmission positioning body, a gear ring, an expandable key block and an expansion screw, and is characterized in that the cutter body is of a circular structure, and the gear ring is connected with the transmission positioning body through the expandable key block and the expansion screw; The transmission positioning body consists of a transmission positioning rotary conical surface, four transmission positioning body key grooves, four transmission positioning threaded holes and a through transmission positioning threaded hole, the half angle of the transmission positioning rotary conical surface is alpha 1 , and the transmission positioning rotary conical surface, the four transmission positioning body key grooves, the four transmission positioning threaded holes and the four through threaded holes are all arranged on the transmission positioning body; The gear ring is composed of a gear ring rotary conical surface, four gear ring conical surface key grooves and four gear ring conical surface threaded holes, the half angle of the gear ring positioning rotary conical surface is alpha 2 , the four gear ring conical surface key grooves and the four gear ring conical surface threaded holes are arranged on the gear ring, and the gear ring and the transmission positioning body correspond to the four transmission positioning key grooves and the four gear ring conical surface key grooves when being matched; The expandable key block consists of an expandable key block taper hole, an expandable key block groove and an avoidance groove S, wherein the expandable key block is placed into four transmission positioning key grooves in the corresponding transmission positioning rotary conical surface and a gear ring conical surface key groove of the gear ring rotary conical surface, the expandable key block is provided with a taper angle beta 1 , and the avoidance groove S is arranged above and below the middle of the expandable key block; The expansion screw consists of an expansion screw cone and an expansion screw thread, the expansion screw cone is arranged above the expansion screw thread, the expansion screw is provided with a cone angle beta 2 , and the expansion screw cone of the expansion screw is matched with the expansion key block cone hole of the expansion key block.
  2. 2. The split indexable gear milling cutter of claim 1 wherein the drive positioning body and the gear ring are tapered self-locking linked.
  3. 3. The split indexable gear milling cutter according to claim 1, wherein the half angle of the transmission positioning rotary conical surface is alpha 1 , and the half angles of the gear ring positioning rotary conical surface are alpha 2 ,α 1 and alpha 2 , respectively, which are 3-8 degrees.
  4. 4. The split indexable gear milling cutter according to claim 1, wherein the angle range of the taper angle beta 1 of the expandable key block and the taper angles beta 2 ,β 1 =β 2 ,β 1 and beta 2 of the expansion screw is 3-10 degrees.
  5. 5. The split indexable gear milling cutter of claim 1 wherein the expandable key block has an expansion groove width B of 0.5 to 1mm and a length L of 1 to 2mm.
  6. 6. The split indexable gear milling cutter of claim 1, wherein the gap between the expandable key block and the transmission positioning body key slot and the gap between the expandable key block and the transmission positioning body key slot are 0.1-0.2mm.
  7. 7. The split indexable gear milling cutter according to claim 1, wherein the indexable gear milling cutter is suitable for gears with a modulus of 2.5-20.

Description

Split indexable gear milling cutter Technical Field The utility model relates to a gear machining cutter, in particular to a split indexable gear milling cutter. Background At present, the shape of a traditional indexable gear milling cutter is a stepped circle, a processed blank is a forged piece round cake-shaped solid material, the diameter of a flange joint after a finished product is D1=phi 180-200 mm, the outer diameter of a cutter is D2=phi 400-450 mm, the thickness H=90-120 mm, the thickness of a middle web plate is h=50-60 mm, the shape is formed by turning the round cake-shaped milling cutter, and two sides of the middle web plate are processed removing parts. Therefore, there is a need to develop new indexable gear mills that are more cost effective and more material efficient. Disclosure of utility model The utility model provides a split indexable gear milling cutter, which aims to solve the problems of long processing time and waste of raw materials caused by removing most of redundant materials when a cutter body of the existing indexable gear milling cutter is processed, and solves the problems as follows: The split indexable gear milling cutter comprises a transmission positioning body, a gear ring, an expandable key block and an expansion screw, wherein the cutter body is of a circular structure, and the gear ring is connected with the transmission positioning body through the expandable key block and the expansion screw; The transmission positioning body consists of a transmission positioning rotary conical surface, four transmission positioning body key grooves, four transmission positioning threaded holes and a through transmission positioning threaded hole, the half angle of the transmission positioning rotary conical surface is alpha 1, and the transmission positioning rotary conical surface, the four transmission positioning body key grooves, the four transmission positioning threaded holes and the four through threaded holes are all arranged on the transmission positioning body; The gear ring is composed of a gear ring rotary conical surface, four gear ring conical surface key grooves and four gear ring conical surface threaded holes, the half angle of the gear ring positioning rotary conical surface is alpha 2, the four gear ring conical surface key grooves and the four gear ring conical surface threaded holes are arranged on the gear ring, and the gear ring and the transmission positioning body correspond to the four transmission positioning key grooves and the four gear ring conical surface key grooves when being matched; The expandable key block consists of an expandable key block taper hole, an expandable key block groove and an avoidance groove S, wherein the expandable key block is placed into four transmission positioning key grooves in the corresponding transmission positioning rotary conical surface and a gear ring conical surface key groove of the gear ring rotary conical surface, the expandable key block is provided with a taper angle beta 1, and the avoidance groove S is arranged above and below the middle of the expandable key block; The expansion screw consists of an expansion screw cone and an expansion screw thread, the expansion screw cone is arranged above the expansion screw thread, the expansion screw is provided with a cone angle beta 2, and the expansion screw cone of the expansion screw is matched with the expansion key block cone hole of the expansion key block. The split type indexable gear milling cutter is applied to a high-speed gear milling machine or a gear hobbing machine, a cutter body positioning transmission positioning body and a gear ring are separately designed, an inflatable key block is placed into a corresponding key groove after being pressed by a special mounting and dismounting tool, an inflatable screw is screwed into the transmission positioning body and the gear ring through a threaded hole, the taper of the inflatable screw is attached to the taper of the inflatable key block, the screw is continuously screwed, the inflatable key block is inflated, the gap between the key groove and the key block is eliminated, the taper of the transmission positioning body and the taper of the gear ring are connected in a self-locking manner, the connection strength of the key groove and the inflatable key block is enhanced, and the transmission positioning body and the gear ring form a firm split type indexable gear milling cutter through the cooperation. The defect of original cutter processing is better made up, the material is saved, the blank material of processing is forging cake-shaped solid material, the thickness of the middle web plate of the cake is h=90-120 mm, the thickness of the middle web plate after processing is only h=50-60 mm, and about 30% of raw materials are wasted. The split indexable gear milling cutter is adopted, and the transmission positioning body is arranged to replace raw materials with higher cost performance, so that