CN216325376U - Expanding drill - Google Patents

Abstract

The application discloses reamer includes: the tool comprises a tool bar (1) and a tool bit (2), wherein the tool bit (2) is detachably connected with the tool bar (1); the cutter head (2) is provided with a plurality of cutting parts (21), and the plurality of cutting parts (21) are arranged on one side, far away from the cutter bar (1), of the cutter head (2) in a surrounding manner; the cutting part (21) is provided with a blade mounting position (22), and the blade (3) is mounted in the blade mounting position (22). The application provides a reamer can dismantle the tool bit with the cutter arbor and be connected, can satisfy the product and trade the demand that corresponds the tool bit fast when remodeling, and the tool bit includes a plurality of cutting portions, installs the blade respectively, adds and to bore hole once and target in place man-hour, only leaves a little finish machining surplus.

Description

Expanding drill

Technical Field

The application relates to the technical field of drill rods, in particular to a reamer.

Background

The concentricity of the inner circle and the outer circle of the hollow forging stock is poor, and flash can be generated when the inner hole of the hollow forging stock is trimmed. In the prior art, a boring cutter is usually adopted for processing, the surface oxide skin and flash are removed by feeding for many times during processing, and the cutter bar shakes and the blade is seriously abraded.

In addition, the inner bore may be machined using a reamer. However, due to different requirements for processing different hollow forging stocks, the reamer needs to replace a cutter head and correct the cutter rod, so that the operation is complex and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide a reamer; the application provides a reamer can dismantle the tool bit with the cutter arbor and be connected, can satisfy the product and trade the demand that corresponds the tool bit fast when remodeling, and the tool bit includes a plurality of cutting portions, installs the blade respectively, adds and to bore hole once and target in place man-hour, only leaves a little finish machining surplus.

The technical scheme provided by the utility model is as follows:

a reamer, comprising: a cutter bar and a cutter head,

the cutter head is detachably connected with the cutter bar;

the cutter head is provided with a plurality of cutting parts which are arranged on one side of the cutter head away from the cutter bar in a surrounding manner;

the cutting part is provided with a blade mounting position, and the blade is mounted in the blade mounting position.

Preferably, the number of the cutting parts is even, and the cutting parts are symmetrical around the axis center of the cutter bar.

Preferably, the number of said cutting portions is 4, 6 or 8.

Preferably, two radial side surfaces of the cutting part are a first side surface and a second side surface respectively, and the blade mounting position is arranged on the first side surface.

Preferably, the first side surface is parallel to the axis of the blade holder and the second side surface is inclined with respect to the axis of the blade holder.

Preferably, the blade is triangular, wherein the first vertex angle and the second vertex angle are close to the end surface of the cutting part, and the third vertex angle is positioned in the cutting part;

the blade part of the blade is arranged between the first vertex angle and the second vertex angle, the blade part is in a fold line shape, and the two sides of the fold line are the same as the included angle alpha formed by the end faces of the cutting part.

Preferably, the blade is equally divided by a central line connecting the third vertex angle and the vertex of the edge folding line, and the included angle alpha formed by two sides of the folding line and the end surface of the cutting part is axially symmetrical relative to the central line.

Preferably, the cutter head is mounted on the cutter bar by a bolt; the bolt passes through the axes of the cutter head and the cutter bar.

Preferably, the cutter arbor is provided with the lug, the tool bit is provided with the matched depressed area.

The application provides a reamer can dismantle the tool bit with the cutter arbor and be connected, can change different tool bits according to the processing needs of difference, with the demand of trading corresponding tool bit fast when satisfying the product and trading the type, avoids the trouble of recalibrating the cutter arbor. The tool bit includes a plurality of cutting portions, and every cutting portion has all set up blade installation position, and the blade is installed in blade installation position, processes axial and circumference when drilling, can drill a hole and target in place once, only leaves a little finish machining allowance. The application provides a reamer can satisfy large aperture part reaming demand.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a reamer in an embodiment of the present invention;

FIG. 2 is an exploded view of a reamer in an embodiment of the present invention;

FIG. 3 is a schematic view of a tool tip according to an embodiment of the utility model;

FIG. 4 is an enlarged, fragmentary view of a tool tip in an embodiment of the utility model;

reference numerals: 1-a cutter bar; 2-a cutter head; 21-a cutting section; 211-a first side; 212-a second side; 22-blade mounting location; 3-blade.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in the drawings, an embodiment of the present invention provides a reamer, including: a knife bar 1 and a knife head 2,

the cutter head 2 is detachably connected with the cutter bar 1;

the cutter head 2 is provided with a plurality of cutting parts 21, and the plurality of cutting parts 21 are arranged on one side of the cutter head 2 away from the cutter bar 1 in a surrounding manner;

the cutting portion 21 is provided with a blade mounting location 22, and the blade 3 is mounted in the blade mounting location 22.

The application provides a reamer can dismantle with tool bit 2 and cutter arbor 1 and be connected, can change different tool bits 2 according to the processing needs of difference, with the demand of trading corresponding tool bit fast when satisfying the product and trading the type, avoids the trouble of recalibrating the cutter arbor. The cutter head 2 comprises a plurality of cutting parts 21, each cutting part 21 is provided with a blade mounting position 22, the blades 3 are mounted in the blade mounting positions 22, axial and circumferential machining is carried out during drilling, the drilling can be carried out in place at one time, and only a little finishing allowance is left. The application provides a reamer can satisfy large aperture part reaming demand.

Preferably, the number of the cutting parts 21 is even, and the cutting parts 21 are symmetrical around the center of the axis of the cutter bar 1.

Preferably, the number of the cutting portions 21 is 4, 6 or 8.

Preferably, the number of the cutting portions 21 is an even number and is arranged symmetrically around the axial center of the holder 1. The cutting part 21 is symmetrical in the center, namely, one cutting part 21 is overlapped with the other cutting part 21 after rotating 180 degrees around the axis of the cutter bar 1. The number of the cutting portions 21 is preferably 4, 6 or 8. When the number of the cutting parts 21 is 4, the cutting parts 21 are opposite to each other in pairs, the first cutting part 21 rotates 180 degrees and is overlapped with the third cutting part 21, and the second cutting part 21 rotates 180 degrees and is overlapped with the fourth cutting part 21; the same applies when the number of the cutting portions 21 is 6 or 8.

Preferably, two sides of the cutting portion 21 in the radial direction are a first side 211 and a second side 212, respectively, and the blade mounting position 22 is disposed on the first side 211.

Preferably, the first side surface 211 is parallel to the axis of the tool holder 1, and the second side surface 212 is inclined with respect to the axis of the tool holder 1.

The cutting portion 21 is arranged around the side of the cutting head 2 facing away from the tool holder 1 and comprises four side surfaces, two of which are substantially in the circumferential direction of the cutting head 2 and two of which are substantially in the radial direction of the cutting head 2, wherein the two side surfaces in the radial direction of the cutting head 2 are designated as a first side surface 211 and a second side surface 212, respectively, and define an insert mounting location 22 arranged at the first side surface 211. That is, the insert 3 is installed on one side surface of the cutting portion 21 in the radial direction, and the position of the insert 3 is deviated from one side compared with the whole cutting portion, when the plurality of cutting portions 21 are symmetrically arranged around the axis center of the tool holder 1, the insert 3 is located on both sides of a connecting line viewed from the connecting line of the two opposite cutting portions 21, when the tool bit 2 rotates, all the cutting portions 21 uniformly rotate in one direction, each cutting portion 21 is that the insert 3 contacts the working surface first, the cutting amount of each cutting edge in the circumferential direction is uniformly distributed, and the uniform stress of each cutting edge is ensured.

Preferably, the first side surface 211 is parallel to the axis of the tool holder 1, and the blade 3 is mounted thereon and also parallel to the axis of the tool holder 1; while the second side 212 obliquely intersects the axis of the shank 1.

The distance between the blade mounting position 22 of different cutter heads 2 and the axis of the cutter head 2 can be different, so that the blade 3 can extend out of the circumferential direction of the cutter head 2 when being mounted at the blade mounting position 22, and the inner wall and the axial direction of the hollow forging stock can be processed simultaneously; the blade 3 may not extend beyond the circumference of the cutter head 2, and only the axial direction of the hollow forging stock is processed.

Preferably, the blade 3 is triangular, wherein a first vertex angle and a second vertex angle are close to the end surface of the cutting part 21, and a third vertex angle is located in the cutting part 21;

the edge part of the blade 3 is arranged between the first vertex angle and the second vertex angle, the edge part is in a fold line shape, and the two sides of the fold line are the same as the included angle alpha formed by the end surface of the cutting part 21.

Preferably, the blade 3 is triangular, two corners (named as a first corner and a second corner) of the three corners of the triangle are close to the end surface of the cutting portion 21, the third corner is located in the cutting portion 21, and the side edge between the first corner and the second corner extends out of the blade mounting position 22, so as to form the edge portion of the blade 3. The blade part is in a fold line shape, and the included angle alpha formed by the two sides of the fold line and the end surface of the cutting part 21 is the same. The edge part is formed by connecting a first fold line and a second fold line, the first fold line is connected with a first vertex angle and a second fold line and gradually rises from one end of the first vertex angle to one end of the second fold line, and the second fold line is similar to the first fold line and the second fold line, so that the joint of the first fold line and the second fold line is convex outwards; the included angle formed by the first folding line and the plane parallel to the end surface of the cutting part 21 is the same as the included angle formed by the second folding line and the plane parallel to the end surface of the cutting part 21.

Preferably, the blade 3 is equally divided by a center line connecting the third vertex angle and the vertex of the edge folding line, and the included angle α formed by the two sides of the folding line and the end surface of the cutting part 21 is axisymmetric relative to the center line.

Furthermore, the blade portion fold line vertex (i.e. the intersection of the first fold line and the second fold line) is connected with the vertex of the third vertex angle, i.e. the midline of the blade 3, the blade 3 is divided into two parts, and the included angle α formed by the two sides of the fold line and the end surface of the cutting portion 21 is axisymmetric relative to the midline, so as to meet the axial feeding requirement.

Preferably, the cutter head 2 is mounted on the cutter bar 1 through a bolt; the bolt passes through the axis of the cutter head 2 and the cutter bar 1.

Preferably, the tool bar 1 is provided with a protrusion and the tool bit 2 is provided with a matching recessed area.

Preferably, the cutter head 2 is arranged on the cutter bar 1 through a bolt, and the bolt passes through the axes of the cutter head 2 and the cutter bar 1 for installation; furthermore, the guide rod 1 is provided with a convex block, the cutter head 2 is provided with a matched concave area, and the cutter head 2 is firstly sleeved on the convex block of the guide rod 1 and then fastened by using a bolt during installation.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A reamer, comprising: a cutter bar (1) and a cutter head (2),

the cutter head (2) is detachably connected with the cutter bar (1);

the cutter head (2) is provided with a plurality of cutting parts (21), and the plurality of cutting parts (21) are arranged on one side, far away from the cutter bar (1), of the cutter head (2) in a surrounding manner;

the cutting part (21) is provided with a blade mounting position (22), and the blade (3) is mounted in the blade mounting position (22).

2. A reamer as claimed in claim 1, wherein the number of cutting portions (21) is an even number, and the cutting portions (21) are symmetrical about the axial centre of the shank (1).

3. A reamer as claimed in claim 2, wherein the number of cutting portions (21) is 4, 6 or 8.

4. A reamer as claimed in any one of claims 1 to 3, wherein the cutting portion (21) is provided with a first side surface (211) and a second side surface (212) on both sides in the radial direction, and the blade mounting location (22) is provided on the first side surface (211).

5. A reamer as claimed in claim 4, wherein the first side (211) is parallel to the axis of the stem (1) and the second side (212) is inclined with respect to the axis of the stem (1).

6. A reamer as claimed in any one of claims 1 to 3, wherein the blade (3) is triangular, wherein a first apex angle, a second apex angle are close to the end surface of the cutting portion (21), and a third apex angle is located within the cutting portion (21);

the blade part of the blade (3) is arranged between the first vertex angle and the second vertex angle, the blade part is in a fold line shape, and the two sides of the fold line are the same as the included angle alpha formed by the end face of the cutting part (21).

7. A reamer as claimed in claim 6, wherein said blades (3) are equally divided by a median line connecting the vertices of the third vertex with the vertices of the broken line of the cutting edge, the two sides of the broken line forming angles α with the end surface of the cutting portion (21) that are axisymmetric with respect to the median line.

8. A reamer as claimed in claim 1, wherein a cutting head (2) is mounted on the cutter bar (1) by means of a bolt; the bolt penetrates through the axes of the cutter head (2) and the cutter bar (1).

9. A reamer as claimed in claim 8, wherein the shank (1) is provided with a protrusion and the cutting head (2) is provided with a mating recess.

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