JP3192622U - End face deep groove cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut an annular groove C concentric with an axis S from an end surface of a rotating round bar member B toward the inside and reuse the inside as a round bar member B', which reduces cutting chips and shortens machining time. Provided is an end face deep groove cutting tool capable of achieving high-precision machining even when cutting an annular groove having a grooving diameter of D80 to 500 mm and a grooving depth of L: 60 to 400 mm. Deep groove cutting of an end face including a support portion 1 detachably fixed to a tool post of a lathe, a holder 2 fixed to a tip portion of the support portion, and a cutting tip 3 fixed to the tip portion of the holder. In the tool A, it is assumed that the holder 2 is processed into a curved plate-like material that can enter the inside of the annular groove by NC lathe processing by a CAD / CAM system. [Selection diagram] Fig. 1

Description

  The present invention relates to an end face deep groove cutting tool used for cutting a large-diameter and deep annular groove from the end face of a round bar toward the inside by lathe machining.

  A drill is generally used as a tool for making a hole in a material when machining parts of various devices. When the hole diameter is large, for example, it can be processed by a method of drilling a hole along the axis from the end surface to the center portion of the round bar, and then finishing the hole diameter with a boring tool. However, drilling with a drill takes a long time if the hole diameter is large, and the amount of cutting waste is large, making it difficult to respond to the environment, and all the holes become cutting waste. Therefore, the material stay is low.

  Therefore, in machining parts such as large energy equipment, when cutting a thick round bar material into a cylindrical shape, instead of cutting with a drill, it is cut into an annular groove concentric with the axis, then inside Conventionally, the remaining portion is extracted. As a tool for that purpose, a holder is fixed to the tip of a rod-like support that is fixed to the tool post of a lathe, a cutting tip is fixed to the tip of the holder, and the holder is cut by the cutting tip. 2. Description of the Related Art Conventionally, a tool formed in a shape and size that can enter the inside of a groove has been used. If this tool is used to cut an annular groove, the inside of the cut annular groove remains as a round bar material, which can be reused as a material, thus reducing costs and reducing cutting waste. It becomes easy to cope with the environment, and a large-diameter annular groove can be opened at a time, so that the processing time can be shortened.

  In addition, as a tool for cutting an annular groove from the end face of a round bar to the inside, there are three tools on the tool support provided at the tip of a cylindrical tool holder. A boring tool is also proposed which is mounted differently (see, for example, Patent Document 1).

JP-A-9-47906

  When machining a large energy equipment component, when cutting an annular groove concentric with the axis from the end face of a round bar to the inside, the holder is fixed to a rod-shaped support that is fixed to the tool post of the lathe. A tool is used in which the cutting tip is fixed and the holder is shaped and dimensioned so that it can enter the annular groove to be cut by the cutting tip. As described above, the cost can be reduced, the amount of cutting waste is small, the environment can be easily handled, and the processing time can be shortened. However, this tool cannot sufficiently cope with the increase of the grooving depth with existing tools.

  In order to increase the depth of the annular groove to be cut, that is, the grooving depth, the tool for cutting the annular groove needs to lengthen the tip of the holder and increase the distance to the blade edge. However, when the tip portion of the holder becomes long, chatter due to the cutting load applied to the tip of the tip tends to occur. For this reason, the shape and dimensions of the tool are devised so that chatter can be suppressed, and the width of the holder portion is increased. However, it is not easy to process a long, wide and complex holder with high accuracy. For this reason, when the holder is long and wide, conventionally, the holder is divided into two parts and processed separately, and they are welded to form an integrated holder.

  However, when the holder is welded, it is difficult to ensure sufficient rigidity against chatter due to the cutting load applied to the tip of the tip. In existing tools that cut an annular groove with a grooving diameter of 80 mm to 500 mm and a grooving depth of 60 mm to 400 mm, the holder has a welded structure, which prevents chatter due to the cutting load being applied to the cutting edge of the tool tip. High-precision machining without dimensional variations could not be realized.

  Further, the above-described boring tool in which three tools are mounted on a tool support provided at the tip of a cylindrical tool holder while being slightly different in distance from the rotation shaft is complicated in structure and expensive. In addition to this, it is difficult to ensure the integral rigidity from the fixing tool fixed to the tool post of the lathe to the tip of the tool, and it is difficult to sufficiently secure the rigidity against chatter.

  The present invention has been made in view of the above circumstances, and in the processing of parts such as large energy equipment, without using a drill to drill a large diameter hole from the end face to the inside in a thick round bar, By cutting the annular groove concentrically with the axis from the end face of the rotating round bar to the inside, the inside of the cut annular groove can be reused as a round bar, reducing costs and reducing cutting waste. It becomes easy to respond to the environment, a large-diameter annular groove can be opened at a time, and the processing time can be shortened. Moreover, an annular groove having a grooving diameter of 80 mm to 500 mm and a grooving depth of 60 mm to 400 mm can be formed. An object of the present invention is to provide an end face deep groove cutting tool capable of preventing high-precision machining without dimensional variation by preventing chatter due to the cutting load being applied to the cutting edge of the tool tip even when cutting.

  The present invention is an end face deep groove cutting tool for cutting an annular groove having an outer diameter of 80 mm to 500 mm and a depth of 60 mm to 400 mm concentrically with the axis of the round bar from the end face of the rotating round bar to the inside. A support part detachably fixed to the tool post of the lathe, a holder fixed to the tip part of the support part by welding or the like, and a cutting tip (hard metal) fixed to the tip part of the holder by welding or the like And a holder provided with an end face deep groove cutting tool characterized by being formed into a curved plate shape that is capable of entering a monolithic material into an annular groove cut by a cutting tip, This solves the above problem. The holder is manufactured by NC lathe processing using a CAD / CAM system using hardened steel such as S45C as a material. The support part is made of hardened steel such as S45C, for example, into a bar shape having a rectangular cross section.

  When machining parts such as large energy equipment, a hole with a large diameter is drilled from the end face to the inside of a thick round bar, and the axis line from the end face of the rotating round bar to the inside without using a drill. By cutting the annular groove concentrically, the inside of the cut annular groove can be reused as a round bar material, enabling cost reduction, reducing cutting waste and facilitating environmental friendliness, and a large-diameter annular groove. Can be opened at a time, and the processing time can be shortened, and even when an annular groove having a grooving diameter of 80 mm to 500 mm and a grooving depth of 60 mm to 400 mm is cut, the cutting load is applied to the cutting edge of the tool tip. Therefore, it is possible to realize high-precision processing without dimensional variation by preventing chattering.

It is a front view of an end face deep groove cutting tool of an example of an embodiment of the present invention. It is a top view of an end face deep groove cutting tool of an example of an embodiment of the present invention. It is a left view of the end face deep groove cutting tool of an example of embodiment of this invention. It is a right view of the end face deep groove cutting tool of an example of embodiment of this invention.

1 to 4 show an end face deep groove cutting tool A as an example of an embodiment of the present invention.
This end face deep groove cutting tool A is attached to a tool post (not shown) of a lathe, and is attached to a spindle head (not shown) of a lathe and rotates, and is an end face of a round bar B such as carbon steel, aluminum, SUS or the like. An annular groove C concentric with the axis S of the round bar B is cut from the inside to the inside, and a holder 2 is welded and fixed to the tip portion of the support portion 1, and a cutting tip 3 is attached to the tip portion of the holder 2. Is fixed by welding.

  The holder 2 has a curved plate shape capable of entering the inside of the annular groove C to be cut by the cutting tip 3, and is adapted to the dimensions of the annular groove C, that is, the groove diameter (outer diameter) D, the groove width H, and the depth L. It has a shape and dimensions, and is manufactured from an integral material such as S45C hardened steel by NC lathe processing using a CAD / CAM system.

  The support part 1 is formed by processing S45C hardened steel or the like into a bar having a rectangular cross section, for example. The cutting tip 3 is made of cemented carbide.

  This end face deep groove cutting tool A is used, for example, when making a hole with a large diameter from the end face to the inside in a round bar material B in parts processing such as a large energy device. Using this end face deep groove cutting tool A, an annular groove C concentric with the axis S of the round bar B is cut from the end face of the round bar B to the inside, and then the portion remaining inside the annular groove C By extracting B ′, it can be finished into a large cylindrical part, and by doing so, the portion B ′ remaining inside the cut annular groove C can be reused as a round bar material, and the cost can be reduced. Since no cutting waste is used, it becomes easier to deal with the environment with less cutting waste, the large-diameter annular groove C can be opened at a time (in one step), and the machining time can be shortened. Even when an annular groove C having an outer diameter (D) of 80 mm to 500 mm and a grooving depth (depth) L of 60 mm to 400 mm is cut, chattering due to the cutting load being applied to the cutting edge of the tool tip (cutting tip 3). High accuracy without dimensional variation It is possible to realize a factory.

  In designing this end face deep groove cutting tool A, the condition of the cause of chattering etc. is extracted by simulation of the end face deep groove machining conditions, and the material of the tool body (holder 2) is aimed at establishing optimum machining conditions. The shape / dimension, the cutting edge angle (the angle of the cutting edge of the cutting tip 3), etc. are adjusted. In order to reflect the simulation results in the structural design, the CAD / CAM system is used to analyze the stress distribution on the tool during cutting and the shape of the cutting waste by the cutting edge angle to prevent chatter and reduce machining time. Design that effectively reflects high-precision machining and expansion of the cutting range.

  The end face deep groove cutting tool A shown in FIGS. 1-4 is an example of embodiment, and this invention is not limited to this.

DESCRIPTION OF SYMBOLS 1 Support part 2 Holder 3 Cutting tip A End face deep groove cutting tool B Round bar C Annular groove D Groove diameter (outer diameter)
L Groove depth (depth of annular groove)
S axis

Claims (1)

An end face deep groove cutting tool for cutting an annular groove having an outer diameter of 80 mm to 500 mm and a depth of 60 mm to 400 mm concentrically with the axis of the round bar from the end face of the rotating round bar,
A support part that is detachably fixed to the tool post of the lathe, a holder fixed to the tip part of the support part, and a cutting tip fixed to the tip part of the holder,
The holder is an end face deep groove cutting tool, wherein the holder is formed by bending a single-piece material into a curved plate shape capable of entering into an annular groove cut by the cutting tip.

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