CN211991238U

CN211991238U - Unequal tooth-dividing reamer

Info

Publication number: CN211991238U
Application number: CN202020449939.7U
Authority: CN
Inventors: 徐强; 苏春洪
Original assignee: Suzhou Ruimo Precision Tool Co ltd
Current assignee: Suzhou Ruimo Precision Tool Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-11-24
Anticipated expiration: 2030-04-01

Abstract

The utility model relates to a reamer has the smooth finish that improves the repair hole and increase of service life's effect. The utility model discloses a tooth reamer varies, including handle of a knife and cutter body, the circumference on cutter body top is provided with six sword teeth, and is adjacent the contained angle between the sword teeth is 66 °, 65 °, 59 °, 57 °, 51 and 62. By means of the cooperation of the six unequal cutter teeth, the smooth finish of the reamer hole is improved, and the service life of the reamer is prolonged.

Description

Unequal tooth-dividing reamer

Technical Field

The utility model relates to a reamer, more specifically says that it relates to a branch tooth reamer varies.

Background

The reamer is provided with one or more cutter teeth, is a rotary cutter for cutting off a thin layer of metal on the surface of a machined hole, and is a rotary finishing cutter with a straight edge or a spiral edge and used for reaming or repairing the hole. The existing reamer has the advantages that cutting edges are arranged on the circumference in an equal partition mode, the tooth groove shape and the tooth depth are completely the same on the same excircle, the cutting amount and the cutting speed of each cutter tooth are the same all the time, therefore, in the machining process, as the contact between a workpiece and each cutter tooth is the same, periodic vibration can be generated in the cutting process, the cutting resistance is increased, the surface of a reamed hole is rough and poor in smoothness, polygonal or axial stripes and spiral stripes exist, and the service life of the reamer is also low.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a minute tooth reamer varies has the periodic vibration of elimination, has the smooth finish and the increase of service life's that improve and repair the hole effect.

In order to achieve the technical purpose, the utility model provides a following technical scheme: the unequal tooth reamer comprises a reamer handle and a reamer body, six cutter teeth are arranged on the top end of the reamer body in the circumferential direction, and the included angles between the adjacent cutter teeth are 66 degrees, 65 degrees, 59 degrees, 57 degrees, 51 degrees and 62 degrees.

By adopting the technical scheme, the milling force applied to the workpiece by the reamer in the milling process is dispersed to wider frequency by means of the unequal cutter teeth, so that the amplitude of each frequency is reduced, and the vibration generated by the reamer due to the reaction force of the workpiece can reduce the amplitude when the unequal cutter teeth are milled, and meanwhile, the periodicity does not exist, the cutting resistance is reduced, the smoothness of hole repairing is improved, and the service life of the reamer is prolonged.

Preferably, the knife teeth with included angles of 66 degrees, 65 degrees and 59 degrees are adjacent, the knife teeth with included angles of 57 degrees, 51 degrees and 62 degrees are adjacent, and the knife teeth with included angles of 59 degrees and 62 degrees are centrosymmetric.

By adopting the technical scheme, because the cutter teeth are not equally divided, the abrasion degrees of the cutter teeth are different, and the cutter teeth of the reamer cannot form a regular shape, so that the actual diameter of the cutter teeth is difficult to test. By means of the two cutter teeth with central symmetry, two points on the periphery of the cutter teeth are guaranteed to be in central symmetry, the distance between the two points is the diameter of the cutter teeth, and the distance between the two points and the circle center is the same, so that the abrasion loss of the two points is the same, the two points can be used as measuring points of the diameter of the cutter teeth, and the operation convenience is improved.

Preferably, the radial sections of the six cutter teeth are arranged in an arc shape with the same rotation direction, and one side of each cutter tooth, which points to the adjacent cutter tooth, extends to form a step block for placing a blade.

By adopting the technical scheme, the step block and the cutter teeth form the end angle for the attachment of the blade, the blade is welded at the end angle, and the step block and the cutter teeth play a limiting role in the blade, so that the position of the blade is unique, and the processing convenience is improved.

Preferably, the step block is provided with a limiting groove along the height direction of the cutter body, the back of the blade extends to form a limiting block inserted into the limiting groove, the limiting block can only be inserted into the limiting groove from the height direction of the cutter body, and the thickness of the limiting block is the same as the depth of the limiting groove.

Through adopting above-mentioned technical scheme, insert the spacing inslot earlier with the stopper of blade, make blade and cutter body relatively fixed, heat the cutter body again, with the blade welding on the sword tooth, the sword tooth can soften after being heated, with the help of the limiting displacement of spacing groove to the stopper, avoids the blade to take place the skew in welding process, has improved the accuracy nature of blade installation.

Preferably, the width of the limiting groove is larger than that of the limiting block.

Through adopting above-mentioned technical scheme, if whole cutter body is all heated the back, the spacing groove also has the possibility of taking place to warp, has the space between stopper both sides and the spacing groove, avoids the spacing groove to warp the back, and the blade can't be taken out, has improved structural rationality.

To sum up, the utility model discloses following effect has been gained:

1. by means of the matching of the six unequal cutter teeth, the smooth finish of the reamer hole is improved, and the service life of the reamer is prolonged;

2. with the help of the cooperation of spacing groove and stopper, realized the accurate fixed of blade.

Drawings

FIG. 1 is a schematic view of a blade for use in the present embodiment;

FIG. 2 is a schematic view of the present embodiment showing the mating relationship of the cutter teeth and the cutter blades;

fig. 3 is a partially enlarged view of a portion a in fig. 2 for showing the fitting relationship between the stopper groove and the stopper.

In the figure, 1, a knife handle; 2. a cutter body; 3. cutter teeth; 4. a step block; 5. a blade; 6. a limiting groove; 7. and a limiting block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b): as shown in fig. 1 and 2, the unequal teeth reamer comprises a shank 1 and a cutter body 2, six cutter teeth 3 are arranged on the top end of the cutter body 2 in the circumferential direction, and the included angles between adjacent cutter teeth 3 are W1 ═ 66 °, W2 ═ 65 °, W3 ═ 59 °, W4 ═ 57 °, W5 ═ 51 °, and W6 ═ 62 °. By means of the unequal cutter teeth 3, the milling force applied to the workpiece by the reamer in the milling process is dispersed to a wider frequency, so that the amplitude of each frequency is reduced, and therefore, when the unequal cutter is used for milling, the vibration generated by the reamer due to the reaction force of the workpiece can be reduced in amplitude, periodicity does not exist, the cutting resistance is reduced, the smoothness of a repaired hole is improved, and the service life of the reamer is prolonged.

As shown in fig. 1, the cutter teeth 3 with the included angles of 66 °, 65 ° and 59 ° are adjacent, the cutter teeth 3 with the included angles of 57 °, 51 ° and 62 ° are adjacent, and the cutter teeth 3 with the included angles of 59 ° and 62 ° are centrosymmetric. With the help of two cutter teeth 3 of central symmetry, guarantee that there are two points to be central symmetry on cutter tooth 3 periphery, the distance between two points is the diameter of cutter tooth 3 promptly, and two points are the same to the distance of centre of a circle simultaneously, therefore the wearing and tearing volume of two points is the same, can regard as the measuring point of cutter tooth 3 diameter, has improved the simple operation nature.

As shown in figure 1, the radial sections of the six cutter teeth 3 are arranged in an arc shape with the same rotation direction, and a step block 4 for placing a blade 5 extends from one side of each cutter tooth 3 which points to the adjacent cutter tooth 3. The blades 5 of the reamer are generally welded on the side walls of the cutter teeth 3, and when the blades 5 need to be replaced, the cutter body 2 is heated, so that the blades 5 can be separated from the cutter teeth 3. The step block 4 and the cutter teeth 3 form an end angle for the attachment of the blade 5, the blade 5 is welded at the end angle, and the step block 4 and the cutter teeth 3 play a limiting role in the blade 5, so that the position of the blade 5 is unique, and the processing convenience is improved.

As shown in fig. 2 and 3, the step block 4 is provided with a limiting groove 6 along the height direction of the cutter body 2, the back of the blade 5 extends to form a limiting block 7 inserted into the limiting groove 6, the limiting block 7 can only be inserted into the limiting groove 6 from the height direction of the cutter body 2, and the thickness of the limiting block 7 is the same as the depth of the limiting groove 6. Insert earlier the stopper 7 of blade 5 in the spacing groove 6, make blade 5 and cutter body 2 relatively fixed, heat cutter body 2 again, with blade 5 welding on sword tooth 3, sword tooth 3 can soften after being heated, with the help of spacing groove 6 to stopper 7 limiting displacement, avoid blade 5 to take place the skew in welding process, improved the accuracy nature of blade 5 installation.

As shown in fig. 3, the width of the limiting groove 6 is greater than that of the limiting block 7. If whole cutter body 2 is all heated the back, spacing groove 6 also has the possibility of taking place to warp, has the space between 7 both sides of stopper and the spacing groove 6, avoids 6 back of warping of spacing groove, and blade 5 can't take out, has improved the structural rationality.

Claims

1. The utility model provides an unequal tooth reamer which characterized in that: including handle of a knife (1) and cutter body (2), the circumference on cutter body (2) top is provided with six sword teeth (3), and is adjacent contained angle between sword tooth (3) is 66 °, 65 °, 59 °, 57 °, 51 and 62 °.

2. The unequal tooth reamer of claim 1 wherein: the contained angle is 66 °, 65 ° and 59 knife teeth (3) are adjacent, the contained angle is 57 °, 51 ° and 62 knife teeth (3) are adjacent, the contained angle is 59 ° and 62 knife teeth (3) are centrosymmetric.

3. The unequal tooth reamer of claim 2 wherein: the radial cross section of six sword tooth (3) sets up to the same arc of turning to, one side extension that sword tooth (3) point to adjacent sword tooth (3) has step piece (4) that are used for placing blade (5).

4. The unequal tooth reamer of claim 3 wherein: the cutter is characterized in that a limiting groove (6) is formed in the step block (4) along the height direction of the cutter body (2), a limiting block (7) inserted into the limiting groove (6) extends from the back of the blade (5), the limiting block (7) can only be inserted into the limiting groove (6) from the height direction of the cutter body (2), and the thickness of the limiting block (7) is the same as the depth of the limiting groove (6).

5. The unequal tooth reamer of claim 4 wherein: the width of the limiting groove (6) is larger than that of the limiting block (7).