CN212286125U

CN212286125U - PCD molding stepped reamer

Info

Publication number: CN212286125U
Application number: CN201922166886.8U
Authority: CN
Inventors: 朱均; 薛彩虹; 朱敖平
Original assignee: Changzhou Yege Tools Co ltd
Current assignee: Changzhou Yege Tools Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2021-01-05
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a PCD molding stepped reamer, which comprises a reamer body and a reamer handle, wherein the reamer body and the reamer handle are fixedly connected, one end of the reamer body, which is far away from the reamer handle, is a cutter head, the reamer body is divided into three bench sections from the cutter head to the reamer handle along the length direction, and the reamer body is in a cylindrical shape with the diameter gradually increased; the cutter body is provided with three groups of blades along the length direction, the left end face of the first group of blades protrudes out of the left end face of the cutter head and extends to the front end parts of the whole first ladder section and the second ladder section from the cutter head along the length direction of the cutter body, the second group of blades is positioned in the middle of the second ladder section and protrudes out of the second ladder section along the radial direction, the second group of blades is formed by combining PCD blades and K10 blades, the PCD blades are wrapped in the K10 blades, and the PCD blades protrude out of the K10 blades; the third group of blades are arranged at the joint of the second ladder section and the third ladder section, the shapes of the blades are consistent with the shape of the ladder, the difference is that the blades are provided with a straight chamfer at the inner edge angle part of 90 degrees of the ladder, and the blades integrally protrude out of the cutter body.

Description

PCD molding stepped reamer

Technical Field

The utility model relates to a machining cutter field especially relates to a PCD shaping ladder reamer.

Background

In consideration of the requirements of weight reduction and multifunctionalization, the modern automobile transmission is increasingly made of die-cast aluminum alloy to manufacture a transmission case with a complex shape, and a plurality of stepped forming holes are formed in the transmission case and have strict quality requirements on surface roughness, roundness, cylindricity, concentricity, no burrs and the like.

In order to meet the requirement of efficiently and highly accurately processing a multi-step forming hole of the gearbox, the reamer for processing the gearbox needs to have high precision and high wear resistance. The traditional integrally formed cutter has the defects of material selection and manufacturing process, the defects of cutter sticking, cutter burning and the like frequently occur when the cutter works under high load, the service life of the cutter is short, and the precision requirement for machining the gearbox cannot be met.

SUMMERY OF THE UTILITY MODEL

To the reamer precision that is used for aluminum alloy gearbox to process among the prior art not high, problem that life is short, the utility model provides a PCD shaping ladder reamer, its technical scheme as follows:

the PCD molding stepped reamer comprises a reamer body and a reamer handle, wherein the reamer handle is fixedly connected with the reamer body, one end of the reamer body, which is far away from the reamer handle, is provided with a cutter head, the reamer body is divided into three steps from the cutter head to the reamer handle along the length direction, the three steps are respectively a first step, a second step and a third step, the three steps are cylindrical and have the same rotation center, the diameter of the first step is smaller than that of the second step, and the diameter of the second step is smaller than that of the third step; the cutter body is provided with three groups of blades along the length direction, wherein the left end surface of a first group of blades protrudes out of the left end surface of the cutter head and extends to the front end parts of the whole first ladder section and the whole second ladder section from the cutter head along the length direction of the cutter body; the second group of blades are positioned in the middle of the second ladder section and protrude out of the second ladder section along the radial direction, the second group of blades comprise an outer blade (A) and an inner blade (B), the inner blade (B) wraps the outer blade (A) in the second ladder section, and the outer blade (A) protrudes out of the inner blade (B); the third group of blades are arranged at the joint of the second ladder section and the third ladder section, the shapes of the blades are consistent with the shape of the ladder, the difference is that the blades are provided with a straight chamfer at the inner edge angle part of 90 degrees of the ladder, and the blades integrally protrude out of the cutter body.

Furthermore, the number of each group of blades in the three groups of blades is not less than two, and a plurality of blades in each group of blades are uniformly distributed along the circumferential direction of the cutter body.

Further, the cutter body is provided with a plurality of chip grooves along length direction, every group blade sets up a chip removal guiding groove around the cutter body circumferencial direction, the chip removal guiding groove collects the reaming piece of every group blade outside the discharge cutter body in the chip groove.

Further, the cutter body is made of 9SiCr, the outer blades (A) and the third blades in the first group of blades and the second group of blades are PCD blades, the inner blades (B) in the second group of blades are K10 blades, and the blades and the cutter body are connected in a welding mode.

Further, the PCD reamer is used for processing the automobile gearbox made of the aluminum alloy material.

The beneficial effects of the utility model reside in that: the tool selects high-quality PCD blade materials and K10 blade materials, and utilizes a high-precision forming and grinding technology to ensure that the shapes of cutting edges obtain excellent and consistent dimensional precision and surface roughness, so that all the cutting edges have excellent cutting performance under different processing loads. The cutter can obtain satisfactory processing quality in use, eliminates the defect of cutter sticking and prolongs the service life of the cutter.

Drawings

FIG. 1 is a schematic structural view of a PCD molding stepped reamer of the present invention;

labeled as: the tool comprises a tool body 1, a tool shank 2, a first ladder section 11, a second ladder section 12, a third ladder section 13, a tool bit 14, a first group of blades 21, a second group of blades 22, an outer blade A, an inner blade B, a third group of blades 23, a chip groove 15 and a chip removal guide groove 16.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

the PCD molding stepped reamer comprises a cutter body 1 and a cutter handle 2, wherein the cutter handle 2 is fixedly connected with the cutter body 1, the diameter of the cutter body 1 is smaller than that of the cutter handle 2, and a chamfer angle is arranged at the connecting part; a cutter head 14 is arranged at one end, far away from the cutter handle 2, of the cutter body 1, the cutter body 1 is divided into three ladder sections from the cutter head 14 to the cutter handle 2 along the length direction, the three ladder sections are respectively a first ladder section 11, a second ladder section 12 and a third ladder section 13, the three ladder sections are cylindrical and have the same rotation center, the diameter of the first ladder section 11 is smaller than that of the second ladder section 12, and the diameter of the second ladder section 12 is smaller than that of the third ladder section 13; the cutter body 1 is provided with three groups of blades along the length direction, wherein the left end surface of a first group of blades 21 protrudes out of the left end surface of the cutter head 14, and extends to the front end parts of the whole first ladder section 11 and the whole second ladder section 12 from the cutter head 14 along the length direction of the cutter body, and chamfers are arranged at the inner edge angle and the outer edge angle of 90 degrees of the first group of blades 21; the second group of blades 22 are positioned in the middle of the second ladder section and protrude out of the second ladder section 12 along the radial direction, and comprise an outer blade (A) and an inner blade (B), the inner blade (B) wraps the outer blade (A) in the second ladder section, and the outer blade (A) protrudes out of the inner blade (B); the third group of blades 23 is arranged at the joint of the second ladder section 12 and the third ladder section 13, the shape of the blades is consistent with that of the ladder, and the difference is that a straight chamfer is arranged at the inner edge position of 90 degrees of the ladder, and the blades integrally protrude out of the cutter body.

The PCD blade is a polycrystalline diamond blade, and the K10 blade is a tungsten steel alloy blade. The cutter body is made of 9SiCr, the first group of blades 21 and the third group of blades 23 are PCD blades, the second group of blades 22 comprise outer blades A made of PCD materials and inner blades B made of K10, and all the blades are connected with the cutter body 1 in a welding mode.

The number of each group of blades in the three groups of blades is not less than two, and a plurality of blades in each group of blades are uniformly distributed along the circumferential direction of the cutter body. The cutter body is provided with a plurality of chip grooves 15 along length direction, every group blade sets up a chip removal guiding groove 16 around 1 circumferencial direction of cutter body, chip removal guiding groove 16 collects the reaming piece of every group blade to the chip groove 15 in discharge cutter body 1 outside.

When using this PCD shaping ladder reamer to add man-hour to the aluminum alloy gearbox, at first need link up the gearbox in the drilling of processing position, then with the position in this cutter tool bit forward alignment hole, slowly stretch into and carry out further reaming, need add cutting fluid to the cooling of cutting edge and wash the metal piece in the reaming, syllogic ladder reamer can obtain required shaping hole, the follow-up processing of the gearbox casing of being convenient for to gearbox casing one-shot forming.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The above description is only a preferred collective embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

PCD shaping step reamer its characterized in that: the cutter comprises a cutter body and a cutter handle, wherein the cutter handle is fixedly connected with the cutter body, one end of the cutter body, which is far away from the cutter handle, is provided with a cutter head, the cutter body is divided into three ladder sections from the cutter head to the cutter handle along the length direction, the three ladder sections are respectively a first ladder section, a second ladder section and a third ladder section, the three ladder sections are cylindrical and have the same rotating center, the diameter of the first ladder section is smaller than that of the second ladder section, and the diameter of the second ladder section is smaller than that of the third ladder section; the cutter body is provided with three groups of blades along the length direction, wherein the left end surface of a first group of blades protrudes out of the left end surface of the cutter head and extends to the front end parts of the whole first ladder section and the whole second ladder section from the cutter head along the length direction of the cutter body; the second group of blades are positioned in the middle of the second ladder section and protrude out of the second ladder section along the radial direction, the second group of blades comprise an outer blade (A) and an inner blade (B), the inner blade (B) wraps the outer blade (A) in the second ladder section, and the outer blade (A) protrudes out of the inner blade (B); the third group of blades are arranged at the joint of the second ladder section and the third ladder section, the shapes of the blades are consistent with the shape of the ladder, the difference is that the blades are provided with a straight chamfer at the inner edge angle part of 90 degrees of the ladder, and the blades integrally protrude out of the cutter body.
2. The PCD contoured stepped reamer of claim 1, wherein: the number of each group of blades in the three groups of blades is not less than two, and a plurality of blades in each group of blades are uniformly distributed along the circumferential direction of the cutter body.
3. The PCD contoured stepped reamer of claim 1, wherein: the cutter body is provided with a plurality of chip grooves along length direction, every group blade sets up a chip removal guiding groove around the cutter body circumferencial direction, the chip removal guiding groove collects the reaming piece of every group blade outside the discharge cutter body in the chip groove.
4. The PCD contoured stepped reamer of claim 1, wherein: the cutter body is made of 9SiCr, the first group of blades, the outer blades (A) of the second group of blades and the third group of blades are PCD blades, the inner blades (B) of the second group of blades are K10 blades, and the blades and the cutter body are connected in a welding mode.