Crankshaft inner milling cutter

Abstract

The utility model provides a crankshaft inner milling cutter, and belongs to the technical field of cutters. The problem that an existing crankshaft inner milling cutter is inconvenient to replace is solved. The crankshaft inner milling cutter comprises a cutter head with a plurality of blades on an inner ring, a fixed disc is positioned and sleeved outside the cutter head, a disc seat for positioning and mounting the fixed disc is radially and outwards protruded on the peripheral wall of the cutter head, a plurality of positioning columns are convexly arranged at the top of the disc seat along the peripheral direction of the disc seat, each positioning column comprises three layers of positioning parts from top to bottom, and an open slot is formed between the peripheral walls of the adjacent positioning parts. The fixing disc is provided with an open groove, a rubber ring is sleeved with the open groove, the fixing disc is provided with a plurality of clamping grooves allowing the positioning parts to be clamped in in a friction mode, the fixing disc is provided with an annular groove with a trapezoidal longitudinal section, and the annular groove is provided with a plurality of screw hole grooves. The tool has the advantages that the blade can be replaced without disassembling the whole tool on a machine position, and the efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools and relates to a milling cutter, in particular to an inner milling cutter for a crankshaft. Background Art

[0002] At present, crankshaft internal milling cutters are used for crankshaft processing. The blades in the existing crankshaft internal milling cutters can be replaced individually to avoid the problem of replacing the entire milling cutter when a single blade is damaged. However, when the internal milling cutter is used to process different crankshaft structures, the blade specifications need to be selected, and the corresponding tool grooves on the cutter disc also need to be changed. However, sometimes the cutter disc is difficult to disassemble as a whole after it is installed on the machine position, which still affects efficiency. Summary of the invention

[0003] The utility model aims to solve the above problems in the prior art and provides a crankshaft internal milling cutter which can conveniently switch the specifications of blades on the machine position.

[0004] The objectives of the utility model can be achieved through the following technical solutions: A crankshaft internal milling cutter, characterized in that it includes a cutter disc with a plurality of blades on the inner ring, a fixed disc is connected to the outer positioning sleeve of the cutter disc, a disc seat for positioning and installing the fixed disc is radially protruded outwardly from the peripheral wall of the cutter disc, a plurality of positioning columns are protruded from the top of the disc seat along its circumferential direction, each of the positioning columns includes three layers of positioning parts from top to bottom, and there are grooves between the peripheral walls of adjacent positioning parts, and rubber rings are sleeved in the grooves, the fixed disc has a plurality of grooves for frictionally engaging the positioning parts, and the fixed disc has an annular groove with a trapezoidal longitudinal section, and the annular groove has a plurality of screw hole grooves.

[0005] In the above-mentioned crankshaft internal milling cutter, a bolt connected to the positioning column is provided in the screw hole groove.

[0006] In the above-mentioned crankshaft internal milling cutter, the fixed disk has a plurality of connecting holes.

[0007] Compared with the prior art, the crankshaft internal milling cutter has the advantage that the blade can be replaced without completely disassembling the tool on the machine, thereby further improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a cross-sectional view of the milling cutter inside the crankshaft.

[0009] In the figure, 1, blade; 2, cutter disc; 3, fixed disc; 4, disc seat; 5, positioning column; 6, positioning part; 7, rubber ring; 8, annular groove; 9, bolt. DETAILED DESCRIPTION

[0010] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0011] like Figure 1 As shown, the crankshaft internal milling cutter comprises a cutter disc 2 with a plurality of blades 1 on the inner ring, a fixed disc 3 is connected with an outer positioning sleeve of the cutter disc 2, a disc seat 4 for positioning and installing the fixed disc 3 is radially protruded from the peripheral wall of the cutter disc 2, a plurality of positioning columns 5 are protruded from the top of the disc seat 4 along its circumferential direction, each positioning column 5 comprises three layers of positioning parts 6 from top to bottom, and there are grooves between the peripheral walls of adjacent positioning parts 6, and rubber rings 7 are sleeved in the grooves, a plurality of card grooves are provided on the fixed disc 3 for frictionally engaging the positioning parts 6, and the fixed disc 3 has an annular groove 8 with a trapezoidal longitudinal section, and the annular groove 8 has a plurality of screw hole grooves, and the fixed disc 3 does not need to be disassembled after being installed on the machine position, and crankshafts of different specifications can be processed by replacing cutter discs 2 of different specifications.

[0012] To be more specific, a bolt 9 connected to the positioning column 5 is disposed in the screw hole groove; and a plurality of connecting holes are provided on the fixing plate 3 for connecting with the machine position.

[0013] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0014] Although the terms such as blade 1, blade disc 2, fixed disc 3, disc seat 4, positioning column 5, positioning part 6, rubber ring 7, annular groove 8, bolt 9 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A crankshaft internal milling cutter, characterized in that: The present invention comprises a cutter disc (2) with a plurality of blades (1) on its inner ring, a fixed disc (3) being positioned and sleeved on the outer side of the cutter disc (2), a disc seat (4) for positioning and installing the fixed disc (3) being protruded radially outwardly on the peripheral wall of the cutter disc (2), a plurality of positioning posts (5) being protruded on the top of the disc seat (4) along its circumferential direction, each of the positioning posts (5) comprising three layers of positioning parts (6) from top to bottom, and a groove is provided between the peripheral walls of adjacent positioning parts (6), and a rubber ring (7) is sleeved in the groove, the fixed disc (3) having a plurality of grooves for frictionally engaging the positioning parts (6), and the fixed disc (3) having an annular groove (8) with a trapezoidal longitudinal section, and the annular groove (8) having a plurality of screw hole grooves.

2. A crankshaft internal milling cutter according to claim 1, characterized in that: A bolt (9) connected to the positioning column (5) is arranged in the screw hole groove.

3. A crankshaft internal milling cutter according to claim 1, characterized in that: The fixing plate (3) has a plurality of connection holes.

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