CN219336010U

CN219336010U - Special cutter for processing fixed point of large-lead inner spiral groove

Info

Publication number: CN219336010U
Application number: CN202223574611.6U
Authority: CN
Inventors: 冯德强; 王士良; 李琨; 郝瑞文; 云雯; 罗宏宇; 邱家敏; 冯竞成; 赵婷; 王莉
Original assignee: Inner Mongolia North Heavy Industries Group Co Ltd
Current assignee: Inner Mongolia North Heavy Industries Group Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-14
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a special cutter for processing a fixed point of a large-lead internal spiral groove, which comprises the following components: the cutter comprises a cutter body, a cutter bar and a screw, wherein the outer wall of the right side of the cutter bar is provided with cutter bar external threads, the left side of the cutter bar is provided with a cutter bar through groove, the left end part of the cutter bar is axially provided with a threaded hole, and the threaded hole is communicated with the cutter bar through groove; the cutter body both sides are provided with the tool bit respectively, and the cutter body is installed in the cutter arbor through groove, and the screw is installed at screw hole, and the cutter body utilizes the fix with screw in the cutter arbor through groove. The utility model solves the processing problem of the fixed point of the large-lead inner spiral groove, has simple structure, convenient manufacture, multiple functions of one cutter and convenient operation.

Description

Special cutter for processing fixed point of large-lead inner spiral groove

Technical Field

The utility model belongs to the technical field of machining, and particularly relates to a special tool for machining a fixed point of a large-lead inner spiral groove.

Background

In practical production, the inner hole spiral groove is usually machined, for the inner hole spiral groove with a larger spiral angle, the axial cutting length of the cutter is 297mm when the main shaft rotates for each circle, two of the inner hole spiral groove are right-handed grooves and two of the inner hole spiral groove are left-handed grooves, each line and the axis form 60 degrees and 120 degrees respectively, an intersection point is 30.5+/-0.1 mm from the end face to the fixed point, namely four spiral grooves are machined in the fixed point range, the thread groove width is 6mm, and the cutter withdrawal groove width is 3mm.

At present, the domestic slotting machine tool can realize reciprocating motion and can process an inner hole spiral groove, but a workbench and a slotting tool do not synchronously rotate, so that the processing of a bidirectional large-lead spiral line intersection point, namely the fixed point, cannot be realized at one time, and the processing method has extremely low production efficiency and higher production cost. And the common equipment is adopted, so that the tool withdrawal groove is narrower than the thread groove, and the thread processing with the groove width of 6mm cannot be finished by using a common inner hole thread tool.

Disclosure of Invention

The utility model aims to provide a special tool for processing a fixed point of a large-lead inner spiral groove, which solves the processing problem of the fixed point of the large-lead inner spiral groove.

The technical proposal is as follows:

a special tool for machining a large lead internal helical groove set point comprising: the cutter comprises a cutter body, a cutter bar and a screw, wherein the outer wall of the right side of the cutter bar is provided with cutter bar external threads, the left side of the cutter bar is provided with a cutter bar through groove, the left end part of the cutter bar is axially provided with a threaded hole, and the threaded hole is communicated with the cutter bar through groove; the cutter body both sides are provided with the tool bit respectively, and the cutter body is installed in the cutter arbor through groove, and the screw is installed at screw hole, and the cutter body utilizes the fix with screw in the cutter arbor through groove.

Further, a cutter bar through hole is axially formed in the right side of the cutter bar through groove.

Further, the top of the cutter head is provided with an inclined plane and a plane, the two inclined planes are respectively positioned at two sides of the plane, the end part plane inclines inwards, the front end of the plane forms a flat blade, the front end of the inclined plane forms a cutting blade, and the two sides of the inclined plane form a rear blade.

Further, the included angle between the inclined plane and the horizontal plane is 15 degrees, the included angle between the end plane and the longitudinal plane is 15 degrees, and clearance angles of 1-1 degrees and 30 degrees are reserved on two sides of the rear edge.

Further, the width and thickness of the cutter head are smaller than the width and width of the cutter body.

Compared with the prior art, the utility model has the following advantages:

according to the utility model, a corresponding macro program is programmed through a numerical control lathe, so that the fixed-point machining of the large-lead spiral groove can be realized.

The utility model has the advantages of simple structure, convenient manufacture, multiple functions of one cutter and convenient operation, only the axial direction is aligned when the cutter blade is replaced in the turning process, the longitudinal axis direction is ensured by the cutter bar, and the secondary clamping is not required when the rotation direction is converted, so that the clamping alignment time is saved, the fixed point position is ensured, and the machining precision is ensured.

The cutter can advance and retreat in the limited vacancy groove under enough strength, even process wider spiral groove, and has great reference value for processing parts with other similar structures.

Drawings

Figure 1 is a schematic diagram of the structure of a special tool for machining a large-lead internal spiral groove fixed point in the utility model;

FIG. 2 is a schematic view of the structure of the cutter body according to the present utility model;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a right side view of fig. 1.

Detailed Description

The following description fully illustrates the specific embodiments of the utility model to enable those skilled in the art to practice and reproduce it.

Fig. 1 is a schematic structural view of a special tool for machining a fixed point of a large-lead inner spiral groove in the utility model.

A special tool for machining a large lead internal helical groove set point comprising: the cutter comprises a cutter body 1, a cutter bar 2 and a screw 3, wherein the outer wall of the right side of the cutter bar 2 is provided with cutter bar external threads, the left side of the cutter bar is provided with a cutter bar through groove, the left side end part of the cutter bar 2 is axially provided with a threaded hole, and the threaded hole is communicated with the cutter bar through groove; the cutter body 1 is installed in the cutter bar through groove, the screw 3 is installed in the threaded hole, and the cutter body 1 is fixed in the cutter bar through groove by the screw 3.

The cutter bar 2 on the right side of the cutter bar through groove is axially provided with a cutter bar through hole. The cutter bar external thread is used for being connected with a cutter frame of the numerical control lathe, and the right side of the cutter bar 2 is connected to the cutter frame.

As shown in fig. 2, a schematic structural view of a cutter body 1 in the present utility model is shown; as shown in fig. 3, which is a top view of fig. 1; as shown in fig. 4, is a right side view of fig. 1.

The cutter head 11 is respectively arranged on two sides of the cutter body 1, and the width and the thickness of the cutter head 11 are smaller than those of the cutter body 1.

The thickness of the cutter body 1 is grinded to be smaller than the width of the withdrawal groove according to the groove shape and the cutting state of the processed part, and the thickness of the cutter body 1 is 2.2mm; the width of the spiral groove is 6mm, the whole width of the cutter head 11 is slightly smaller than the width of the spiral groove by 0.01-0.03mm in consideration of the influence of the uncertain factors in the processing process, and the width of the cutter head 11 is 5.8-5.9 mm; the cutter body 1 is positioned in the cutter bar through groove for sliding fit so as to reduce processing vibration.

The tool bit 11 top both sides are provided with inclined plane, plane respectively, and two inclined planes are located the plane both sides respectively, and tip plane inclines to inboard, and the plane front end forms the flat sword, and the inclined plane front end forms the cutting edge, and the inclined plane both sides form the trailing edge. The inclined plane and the horizontal plane have an included angle of 15 degrees, and the end plane and the longitudinal plane have an included angle of 15 degrees.

Cutting parameters of the cutter head 11: selecting a 0 degree rake angle to enhance cutter cutting resistance and strength; to reduce cutting resistance, the width of the flat blade is 3.5mm; the clearance angle between the two sides of the rear edge is 1-1 degrees 30', so that the clamping of the cutter during cutting is prevented.

When the cutter is installed, the cutter body 1 is installed on the cutter bar 2, the flat blade, the cutting blade and the thread groove are kept to be vertical in the normal direction, and the cutter body is fastened by the screw 3; in order to ensure the machining precision, the symmetry degree of the cutter body 1 and the cutter bar 2 is not more than 0.02mm; and keeps the cutter body 1 perpendicular to the central axis of the cutter bar 2 not more than 0.01mm. And then determining the fixed point position through a pre-programmed program, and controlling the trend of the numerical control lathe to realize the forward and reverse machining of the spiral groove, thereby achieving the purpose of fixed point machining of the spiral groove in a large lead.

In the turning process, the main shaft of the numerical control lathe rotates positively, the cutter body 1 is cut in layers for multiple times along the axial direction until the depth of the spiral groove is reached, and then the cutter is withdrawn to a proper position outside the part, so that the processing of a 60-degree right-handed groove is completed; by moving the pitch, another helical groove processing of the same angle and direction is completed. The trend of the numerical control lathe is controlled, the main shaft is reversed, the 120-degree spiral groove is machined, and the spiral groove machining with the same angle and direction is finished by the same method; meanwhile, the fixed point size is 30.5+/-0.1 through a numerical control program, so that the fixed point machining of the large-lead inner spiral groove is achieved.

The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present utility model may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A special tool for machining a large-lead internal spiral groove fixed point, comprising: the cutter comprises a cutter body, a cutter bar and a screw, wherein the outer wall of the right side of the cutter bar is provided with cutter bar external threads, the left side of the cutter bar is provided with a cutter bar through groove, the left end part of the cutter bar is axially provided with a threaded hole, and the threaded hole is communicated with the cutter bar through groove; the cutter body both sides are provided with the tool bit respectively, and the cutter body is installed in the cutter arbor through groove, and the screw is installed at screw hole, and the cutter body utilizes the fix with screw in the cutter arbor through groove.

2. A special tool for machining a fixed point of a large-lead internal spiral groove as claimed in claim 1, wherein a tool bar through hole is axially formed on the right side of the tool bar through groove.

3. A special tool for machining a fixed point of a large-lead internal spiral groove as claimed in claim 1, wherein the top of the tool bit is provided with inclined planes and planes, the two inclined planes are respectively positioned on two sides of the plane, the end planes of the two inclined planes incline inwards, the front ends of the two inclined planes form a flat blade, the front ends of the two inclined planes form a cutting blade, and the two sides of the two inclined planes form a rear blade.

4. A special tool for machining a fixed point of a large-lead internal spiral groove as claimed in claim 3, wherein the inclined plane forms an angle of 15 degrees with the horizontal plane, the end plane forms an angle of 15 degrees with the longitudinal plane, and clearance angles of 1-1 degrees 30' are reserved on two sides of the rear edge.

5. A special tool for machining a high lead internal helical flute set point as defined in claim 1 wherein the width and thickness of the tool bit is less than the width and width of the tool body.