Composite boring tool

Abstract

The utility model is applicable to the technical field of machine tool cutters, and provides a composite boring cutter which comprises a boring cutter holder, an auxiliary cutter holder and a composite cutter bar for fixing a cutter handle in sequence, the boring cutter holder is fixedly provided with at least one boring blade, and the auxiliary cutter holder is fixedly provided with at least one turning fillet blade and an end flattening blade. The boring cutter blade for machining holes, the fillet turning blade and the end flattening blade for machining the end faces of the holes are installed on the same cutter in a combined mode according to the machining positions, and the fillet turning blade comprises two inner arc-shaped cutting edges which are arranged on the opposite sides. In this way, when the tool is used on a center lathe, chamfering and end face turning can be conducted on the end and the edge of the inner hole at the same time when the inner hole is machined, the tool only needs to be installed on the center lathe to be used, tool changing is not needed among multiple procedures, machining efficiency is improved, and production cost is reduced.

Description

Technical Field

[0001] The utility model is applicable to the technical field of machine tool cutters and provides a composite boring cutter. Background Art

[0002] Boring cutters are generally used for processing the inner hole wall of sleeve-type workpieces. In addition to processing the inner hole wall, hole-type parts usually also need to chamfer the edge of the hole and turn the end face. Usually, the most convenient way to process such multi-step parts is to use CNC machine tools with automatic tool change. CNC machine tools have certain advantages in processing accuracy and speed, but the cost of the machine itself and the cost of tools are much higher than ordinary machine tools, resulting in excessively high costs and low economic benefits in batch production. If traditional machine tools are used for processing, different types of processing heads need to be replaced during the processing to complete each processing step in turn. However, ordinary lathe heads need to be stopped for replacement, which is very slow. Their processing efficiency is too low and cannot meet the needs of batch production. Utility Model Content

[0003] To this end, the utility model provides a composite boring tool, by compositely installing a boring blade for processing holes, a filleting blade, and an end flattening blade for processing the end face of the hole on the same tool according to the processing position, so that when the tool is used on an ordinary lathe, it can simultaneously chamfer the end and edge and turn the end face while processing the inner hole.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite boring tool, including a composite tool rod, which in turn includes a boring tool holder, an auxiliary tool holder and a fixed tool handle, the boring tool holder is fixedly provided with at least one boring blade, the auxiliary tool holder is fixedly provided with at least one corner rounding blade and an end flattening blade, and the corner rounding blade includes two inner arc-shaped cutting edges arranged on opposite sides.

[0005] Furthermore, there are two boring blades, and the two boring blades are symmetrically arranged on the boring tool holder.

[0006] Furthermore, the model of the boring blade is SCMT09T308.

[0007] Furthermore, the number of the corner radiusing blades and the end leveling blades are both two, and the corner radiusing blades and the end leveling blades are arranged on the auxiliary tool seat in a ring-shaped manner. The two corner radiusing blades are symmetrically arranged on the auxiliary tool seat, and the two end leveling blades are symmetrically arranged on the auxiliary tool seat.

[0008] Furthermore, the corner rounding blade model is CCMT1204R4, and the end leveling blade model is SCMT09T308.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] In the scheme of the utility model, through the boring cutter blade, the filleting blade and the end smoothing blade, the tool can realize two processes of end face processing and filleting of the edge of the side wall of the hole while boring the hole. At the same time, the tool only needs to be installed on an ordinary lathe for use, and there is no need to change the tool between multiple processes, which improves the processing efficiency and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural front view of a composite boring tool mentioned in the utility model;

[0012] Figure 2 for Figure 1 The left view of the structure of a composite boring tool.

[0013] In the figure: 1. Boring tool holder, 2. Auxiliary tool holder, 3. Fixed tool handle, 4. Boring blade, 5. Corner radius turning blade, 6. End flattening blade. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0015] For example, see the attached Figure 1 ~Attached Figure 2The utility model provides a composite boring tool, including a composite tool rod, which includes a boring tool holder 1, an auxiliary tool holder 2 and a fixed tool handle 3 in sequence, wherein the fixed tool handle 3 is used to fix the tool on a machine tool, and the boring tool holder 1 is fixedly provided with two boring blades 4, which are symmetrically arranged around the central axis of the boring tool holder 1. The boring blade 4 in this embodiment is of the model SCMT09T308, which is a conventional blade with moderate cost and stronger substitutability. The auxiliary tool holder 2 is fixedly provided with two rounding blades 5 and two end leveling blades 6, which are arranged on the auxiliary tool holder 2 in a ring-shaped manner. The rounding blades 5 and the end leveling blades 6 are arranged at intervals, and the rounding blades 5 and the end leveling blades 6 are arranged at intervals, so that the rounding and end faces can be rounded in sequence according to the blade installation order during processing, so that the connection position between the end of the hole and the edge fillet will have a smoother transition. Smooth, two corner rounding blades 5 are symmetrically arranged around the central axis of the auxiliary tool holder 2, and two end leveling blades 6 are also symmetrically arranged around the central axis of the auxiliary tool holder 2. At the same time, the corner rounding blade 5 includes two inner arc-shaped cutting edges arranged on opposite sides. The corner rounding blade 5 processes two inner arc-shaped cutting edges within its limited size. After one of the cutting edges is damaged, it only needs to rotate the corner rounding blade 5 180° to continue to use it, which improves the utilization rate of the blade and reduces the cost. In this embodiment, the model of the end leveling blade 6 is consistent with the boring blade 4, which is SCMT09T308, thereby improving the versatility of this blade, and the corner rounding blade 5 model is CCMT1204R4, which is modified from the conventional model blade CCMT120408. Two inner arc-shaped cutting edges are processed on the basis of the CCMT120408 blade to meet the needs of the corner rounding blade 5 in this embodiment.

[0016] The working principle of this embodiment is as follows:

[0017] During the use of the composite boring tool of this embodiment, first, the fixed tool holder 3 is clamped by the machine tool fixture to fix the entire tool, and then the workpiece is assembled to the rotating end of the machine tool, thus completing the preparation work before processing, and then the machine tool is started to push the boring tool holder 1 into the hole of the workpiece, and first the inner wall of the workpiece hole is processed by two boring blades 4 until the boring tool holder 1 completes the processing of the inner wall of the hole, and as the composite tool rod continues to advance, the two corner radiusing blades 5 and the two end smoothing blades 6 of the subsequent auxiliary tool holder 2 will respectively abut against the hole edge and the hole end face of the workpiece, at this time the corner radiusing blade 5 and the end smoothing blade 6 will respectively perform the operations of corner radiusing and end smoothing, until the processing of the workpiece hole is finally completed.

[0018] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0019] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the above technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A composite boring tool, characterized in that: The composite tool bar comprises a boring tool holder (1), an auxiliary tool holder (2) and a fixed tool handle (3) in sequence, the boring tool holder (1) being fixedly provided with at least one boring blade (4), the auxiliary tool holder (2) being fixedly provided with at least one corner rounding blade (5) and an end flattening blade (6), the corner rounding blade (5) comprising two inner arc-shaped cutting edges arranged on opposite sides.

2. A composite boring tool according to claim 1, characterized in that: The number of the boring blades (4) is two, and the two boring blades (4) are symmetrically arranged on the boring tool seat (1).

3. A composite boring tool according to claim 2, characterized in that: The model of the boring blade (4) is SCMT09T308.

4. A composite boring tool according to claim 1, characterized in that: The number of the corner filleting blades (5) and the end leveling blades (6) are both two, and the corner filleting blades (5) and the end leveling blades (6) are arranged on the auxiliary tool seat (2) in an annular manner and at intervals, and the two corner filleting blades (5) are symmetrically arranged on the auxiliary tool seat (2), and the two end leveling blades (6) are symmetrically arranged on the auxiliary tool seat (2).

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