CN210359436U

CN210359436U - Expanding drill for machining stepped hole

Info

Publication number: CN210359436U
Application number: CN201921111806.2U
Authority: CN
Inventors: 魏攀; 肖丁; 熊运江; 李超; 王恨修
Original assignee: Qingling Motors Group Co Ltd; Qingling Isuzu Chongqing Engine Co Ltd
Current assignee: Qingling Motors Group Co Ltd; Qingling Isuzu Chongqing Engine Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-21
Anticipated expiration: 2029-07-16

Abstract

The utility model belongs to the cutter field especially relates to a reamer for processing shoulder hole. The cutter body is sequentially provided with a first blade group used for machining a small-diameter hole and a second blade group used for machining a large-diameter hole from the front end to the rear end, the first blade group comprises a first blade and a second blade, the cutting edge of the first blade on a machining station and the cutting edge of the second blade on the machining station are arranged in an inclined mode, the second blade group comprises a third blade, and the third blade and any blade in the first blade group are arranged in the same cutter groove in the cutter body. The utility model has the advantages that: the blades are compact and reasonable in layout, the stepped holes are machined in the same process, production efficiency is improved, the number of the cutters is reduced, cost is reduced, the first blades and the second blades of the first blade group are obliquely arranged, cutting performance of the blades is improved, vibration is small, and machining is stable.

Description

Expanding drill for machining stepped hole

Technical Field

The utility model belongs to the cutter field especially relates to a reamer for processing shoulder hole.

Background

Many workpieces need to be machined with stepped holes in the production process, but the traditional machining method of the stepped holes generally adopts two cutters to be machined in two procedures. For example, when a crankshaft big-end bearing hole is machined, the diameter difference between a small-diameter hole and a big-diameter hole of a stepped bearing hole is smaller than 4mm, machining allowance is small, and the machining efficiency is low and the cost is high due to the sub-process machining.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, an object of the present invention is to provide a reamer for processing stepped holes, which is used for solving the problems of low processing efficiency, high production cost and the like in the prior art.

In order to achieve the above and other related objects, the present invention provides a reamer for processing stepped hole, including a cutter body, the cutter body is equipped with the first blade group that is used for processing the minor diameter hole and the second blade group that is used for processing the major diameter hole by front end to rear end in proper order, first blade group includes first blade and second blade, the cutting edge that first blade is located the processing station and the cutting edge slope setting that the second blade is located the processing station, the second blade group includes the third blade, the same sword inslot on the cutter body is installed with arbitrary blade in the first blade group to the third blade.

The utility model has the advantages that: the blades are compact and reasonable in layout, the stepped holes are machined in the same process, production efficiency is improved, the number of the cutters is reduced, cost is reduced, the first blades and the second blades of the first blade group are obliquely arranged, cutting performance of the blades is improved, vibration is small, and machining is stable.

Optionally, the first blade includes four cutting edges, the four cutting edges are connected end to form a parallelogram with two acute vertex angles, and one acute vertex angle faces the front end of the cutter body.

Optionally, the second blade includes four cutting edges, the four cutting edges are connected end to form a parallelogram with two obtuse vertex angles, and one obtuse vertex angle faces the front end of the cutter body.

Optionally, the third insert is mounted in the same pocket as the second insert.

The beneficial effect of adopting the further scheme is that: the structure layout is compact, and simple to operate saves space, has guaranteed the intensity of cutter body, and the obtuse angle apex angle of second blade makes the second blade center be close to the cutter body center towards the cutter body front end, provides installation space for the third blade, and the acute angle apex angle of first blade is towards the cutter body front end for the cutter body center is kept away from at the center of first blade, the first blade of being convenient for, second blade, third blade chip removal.

Optionally, the distance between the rear end of the cutting edge of the second blade at the processing station and the front end of the cutting edge of the third blade at the processing station in the axial direction of the cutter body is greater than 8 mm.

Optionally, the cutting edge of the first blade at the processing station and the cutting edge of the second blade at the processing station form an apex angle of 120 °.

Optionally, the cutting edge of the third blade at the processing station is arranged in parallel with the axial direction of the cutter body.

The beneficial effect of adopting the above optional scheme is: sufficient installation space is provided for the third blade, and the cutting edge that first blade and second blade are located the processing station forms 120 apex angles and is favorable to improving the intensity of blade and reducing the processing vibration, improves processingquality and stability.

Optionally, the cutter comprises a cutter rod connected with the rear end of the cutter body, a cooling main channel is arranged in the cutter rod, and cooling liquid outlets corresponding to the first blade, the second blade and the third blade are arranged on the cooling main channel.

Optionally, the cutter body and the cutter bar are of an integral structure.

Optionally, the cutter bar is of a cylindrical structure, and a planar portion used for being locked with the equipment spindle in a matched mode is arranged on the side wall of the cutter bar.

Optionally, the difference in the bore diameter of the first blade group and the second blade group machining bore diameter is less than 4 mm.

The beneficial effect of adopting the above optional scheme is: simple to operate, the connection is stable firm, cools off, lubricates, washs each blade through setting up cooling main channel and coolant liquid export, guarantees the stability of each blade processing and the temperature when reducing the cutting.

Drawings

Fig. 1 is a front view of a reamer for machining a stepped hole according to the present invention;

fig. 2 is a left side view of the reamer for processing the stepped hole of the present invention;

fig. 3 is a right side view of the reamer for processing the stepped hole of the present invention;

fig. 4 is a bottom view of the reamer for processing the stepped hole of the present invention.

Description of reference numerals

1, a cutter body;

11 cutter grooves;

21 a first blade;

22 a second blade;

23. 24 blades;

3 a third blade;

31 a blade edge;

4, a cutter bar;

41. 42 a planar portion;

5 cooling the main channel;

51. 52, 53 cooling the branch ducts.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the terms "upper", "lower", "left", "right", "middle" and "one" used herein are for clarity of description, and are not intended to limit the scope of the invention, but rather the scope of the invention.

As shown in fig. 1 to 4, the forward direction of the cutter body 1 is defined as forward, that is, the end provided with the first blade group is defined as forward, and the end provided with the cutter bar is defined as backward.

As shown in fig. 1, fig. 3 and fig. 4, the utility model discloses a reamer for processing shoulder hole, including cutter body 1, cutter body 1 is equipped with the first blade group that is used for processing the minor diameter hole and the second blade group that is used for processing the major diameter hole by front end to rear end in proper order, first blade group and the coaxial setting of second blade group are on same cutter body 1, thereby realize the reaming processing of shoulder hole in same process.A first blade group includes first blade 21 and second blade 22, cutting edge 23 that first blade 21 is located the processing station and cutting edge 24 slope setting that second blade 22 is located the processing station, the apex angle α that cutting edge 23 that first blade 21 is located the processing station and cutting edge 24 that second blade 22 is located the processing station formed can be for 120, the structure that adopts cutting edge 23 and cutting edge 24 slope design is favorable to reducing the vibration of cutter in the course of working, improve processingquality and processing stability, the intensity of cutter has been guaranteed in the reaming simultaneously in slope, extension cutter life.

As shown in fig. 1, 3 and 4, the second blade group includes a third blade 3, and the third blade 3 is mounted in the same pocket 11 of the cutter body 1 as any one of the first blade group. The first blade 21 includes four cutting edges, and the four cutting edges are connected end to form a parallelogram with two acute angles, and one acute angle is towards the front end of the cutter body 1. The second blade 22 includes four cutting edges, the four cutting edges are connected end to enclose a parallelogram with two obtuse vertex angles, one of the obtuse vertex angles faces the front end of the cutter body 1, and the second blade 22 and the first blade 21 have the same structure. Third blade 3 and second blade 22 are installed in same sword inslot 11, and third blade 3 and the second blade 22 of obtuse angle apex angle orientation cutter body front end are installed in same sword inslot 11, and is rationally distributed, is favorable to reducing the occupation space when second blade 22 and third blade 3 install, reduces the sword groove, has guaranteed the intensity of cutter body 1. The distance H1 between the rear end of the cutting edge 24 of the second blade 22 at the processing station and the front end of the cutting edge 31 of the third blade 3 at the processing station in the axial direction of the cutter body is larger than 8mm, so that the size of the installation space of the second blade 22 and the third blade 3 is ensured, and the height difference between the cutting edge 22 of the first blade 21 and the cutting edge 24 of the second blade 23 in the axial direction is within 0.01 mm. The aperture difference of the processing apertures of the first blade group and the second blade group is smaller than 4mm, namely the difference between the aperture D1 processed by the first blade 21 and the second blade 22 and the aperture D2 processed by the third blade 3 is smaller than 4mm, the processing allowance is small, and the quality of realizing the broaching of the stepped hole by the same tool is ensured. The cutting edge 31 of the third blade 3 located at the machining station is arranged in parallel with the cutter body 1 in the axial direction and used for machining a large-diameter hole of a stepped hole, machining allowance between the small-diameter hole and the large-diameter hole is small, and the third blade 3 is arranged, so that machining quality is guaranteed, and cost is reduced.

As shown in fig. 1 to 4, the reamer for processing stepped holes of the present invention further includes a cutter bar 4 connected to the rear end of the cutter body 1, and the cutter body 1 and the cutter bar 4 may be of an integral structure. Be equipped with cooling total channel 5 in the cutter arbor 4, be equipped with on the cooling total channel 5 respectively with first blade 21, second blade 22, the coolant liquid export that third blade 3 corresponds, coolant liquid export 51 and first blade 21 correspond the setting, coolant liquid export 52 and second blade 22 correspond the setting, coolant liquid export 53 and third blade 3 correspond the setting, make the cutter in the course of working each blade in time obtain the cooling, lubricate, wash, the stability and the quality of processing have been guaranteed. The cutter arbor 4 can be the cylinder structure, and the lateral wall of cutter arbor 4 is equipped with two plane portions that are used for locking with the equipment main shaft cooperation, and locking is firm, and is difficult not hard up. During installation, the cutter bar 4 extends into the equipment main shaft, the locking bolt extends into the equipment main shaft along the radial direction of the equipment main shaft to prop against the plane part 41 and the plane part 42, fastening of the cutter and the equipment main shaft is achieved, side-fixing type locking is adopted, and operation is simple, convenient and quick.

The utility model discloses an each blade has reduced the requirement to installation space through simple compact overall arrangement, has guaranteed the intensity of cutter simultaneously, realizes accomplishing the reaming processing of shoulder hole at same process, improves machining efficiency, has guaranteed the stability of processing atress, reduces the vibration of adding man-hour, improves the life of cutter.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a reamer for processing shoulder hole which characterized in that: the cutter body is sequentially provided with a first blade group used for machining a small-diameter hole and a second blade group used for machining a large-diameter hole from the front end to the rear end, the first blade group comprises a first blade and a second blade, the cutting edge of the first blade on a machining station and the cutting edge of the second blade on the machining station are arranged in an inclined mode, the second blade group comprises a third blade, and the third blade and any blade in the first blade group are arranged in the same cutter groove in the cutter body.

2. The reamer for machining stepped holes of claim 1, wherein: the first blade comprises four cutting edges, the four cutting edges are connected end to form a parallelogram with two acute-angle vertex angles, and one acute-angle vertex angle faces the front end of the cutter body.

3. The reamer for machining stepped holes of claim 2, wherein: the second blade comprises four cutting edges, the four cutting edges are connected end to form a parallelogram with two obtuse vertex angles, and one obtuse vertex angle faces the front end of the cutter body.

4. The reamer for machining stepped holes of claim 3, wherein: the third blade and the second blade are arranged in the same cutter groove.

5. The reamer for machining stepped holes of claim 1, wherein: the distance between the rear end of the cutting edge of the second blade positioned at the machining station and the front end of the cutting edge of the third blade positioned at the machining station in the axial direction of the cutter body is larger than 8 mm.

6. The reamer for machining stepped holes of claim 1, wherein: the blade edge of the first blade located at the processing station and the blade edge of the second blade located at the processing station form a 120-degree vertex angle.

7. The reamer for machining stepped holes of claim 1, wherein: the cutting edge of the third blade positioned at the processing station is arranged in parallel with the cutter body in the axial direction.

8. The reamer for machining stepped holes of claim 1, wherein: the cutter comprises a cutter body and is characterized by further comprising a cutter bar connected with the rear end of the cutter body, a cooling main channel is arranged in the cutter bar, and cooling liquid outlets corresponding to the first blade, the second blade and the third blade are formed in the cooling main channel.

9. The reamer for machining stepped holes of claim 8, wherein: the cutter arbor is the cylinder structure, the lateral wall of cutter arbor is equipped with the plane portion that is used for locking with the cooperation of equipment main shaft.

10. The reamer for machining stepped holes of claim 1, wherein: the aperture difference of the processing apertures of the first blade group and the second blade group is less than 4 mm.