CN212311744U

CN212311744U - High-precision grinding tool for excircle of tapered thin-wall part

Info

Publication number: CN212311744U
Application number: CN202020345076.9U
Authority: CN
Inventors: 赵东; 张扬明
Original assignee: Chengdu Lianyu Precision Machinery Co ltd
Current assignee: Chengdu Lianyu Precision Machinery Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2021-01-08
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a take tapering thin wall class part excircle high accuracy abrasive machining frock, the locating part who is the echelonment including the tip, be provided with on the locating part with take the first locating surface of awl thin wall mold insert on first locating end face contact, still be provided with on the locating part with first locating end on the first locating shaft of hole complex, take the second locating surface contact on the terminal surface of second locating end and the clamp plate on the awl thin wall mold insert, be connected through the locking Assembly who passes area awl thin wall mold insert axle center between clamp plate and the locating part, still be provided with the second locating shaft who makes things convenient for the three-jaw centre gripping on the locating part. The end face of the part can be uniformly stressed by the tool, the traditional mode of point clamping stress and line pressing stress is changed, the part deforms due to external force when the surface stress is utilized to avoid processing an excircle, the concentricity of the excircle is ensured, the processing concentricity of the excircle can reach within 3um, the coaxiality of an outer cone can reach 0.001 degree, and the qualification rate can reach more than 98%.

Description

High-precision grinding tool for excircle of tapered thin-wall part

Technical Field

The utility model relates to a parts machining tool equipment field, in particular to take tapering thin wall class part excircle high accuracy abrasive machining frock.

Background

With the development of the society and the progress of science and technology, the demand for various high-precision equipment is more and more, the high-precision equipment generally needs high-precision parts, the processing difficulty of the high-precision parts is high, the yield is low, and particularly, the processing difficulty of the thin-wall insert with the cone is higher. The taper thin-wall insert is difficult to clamp when the excircle is machined, the taper thin-wall insert is deformed due to overlarge clamping force, the taper thin-wall insert is easy to loosen when the taper thin-wall insert is machined due to undersize clamping force, and the taper thin-wall insert is unqualified in the finished product after machining under any condition, so that the machining cost of the taper thin-wall insert is increased, the machining efficiency is low, and the qualified rate of the finished product is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of prior art, provide area tapering thin wall class part excircle high accuracy abrasive machining frock.

The purpose of the utility model is realized through the following technical scheme:

the high-precision grinding tool for the excircle of the thin-wall part with the taper comprises a positioning part with a stepped end part, wherein a first positioning surface in contact with the end surface of a first positioning end on the thin-wall part with the taper is arranged on the positioning part, a first positioning shaft matched with an inner hole on the first positioning end is also arranged on the positioning part, the end surface of a second positioning end on the thin-wall part with the taper is in contact with a second positioning surface on a pressing plate, the pressing plate is connected with the positioning part through a locking assembly, and the locking assembly penetrates through or partially penetrates through the thin-wall part with the taper.

Furthermore, a second positioning shaft convenient for three-jaw clamping is further arranged on the positioning component.

Furthermore, the first positioning end is arranged at the small-diameter end of the insert with the tapered thin-wall part, and the second positioning end is arranged at the large-diameter end of the insert with the tapered thin-wall part.

Furthermore, the pressing plate is circular, and the diameter of the pressing plate is larger than that of the inner hole of the large-diameter end of the tapered thin-wall insert.

Further, the locking assembly also penetrates through the axis of the positioning component.

Furthermore, locking Assembly includes that both ends all set up the screwed check lock pole, the one end of check lock pole is passed through the clamp plate nut and is fixed the clamp plate, its other end passes through lock nut and fixes the tip of second location axle.

Further, locking Assembly includes that one end sets up the screwed check lock lever, the one end of check lock lever is passed through the clamp plate nut and is fixed the clamp plate, its other end fixed connection is at the tip of first locating shaft.

Further, the axes of the positioning part, the tapered thin-wall insert, the pressing plate and the locking assembly are overlapped.

The utility model has the advantages that:

1) the end face of taking awl thin wall mold insert both ends is directly cliied to this frock to utilize first locating shaft to fix a position with the mode of taking awl thin wall mold insert hole complex, can make the even atress of terminal surface of part like this, the mode of traditional point centre gripping atress and line pressure atress has been changed, the part warp because of external force when utilizing the face atress can avoid processing the excircle, the concentricity of excircle has been guaranteed, the excircle processing concentricity can reach within 3um, the outer cone axiality can reach 0.001 degree, the qualification rate can reach more than 98%.

Drawings

FIG. 1 is a schematic structural view of a tapered thin-walled insert;

FIG. 2 is a schematic view of a clamping structure of the tool according to the first embodiment;

fig. 3 is a schematic view of a tool clamping structure according to a second embodiment;

in the figure, 1-a positioning part, 2-a tapered thin-walled insert, 3-a first positioning end, 4-a first positioning surface, 5-an inner hole, 6-a first positioning shaft, 7-a second positioning end, 8-a pressure plate, 9-a second positioning surface, 10-a second positioning shaft, 11-a locking rod, 12-a pressure plate nut and 13-a locking nut.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the high-precision grinding tool for the excircle of the thin-wall part with the taper comprises a positioning part 1 with a stepped end part, wherein a first positioning surface 4 in end surface contact with a first positioning end 3 on a thin-wall insert 2 with the taper is arranged on the positioning part 1, a first positioning shaft 6 matched with an inner hole 5 on the first positioning end 3 is also arranged on the positioning part 1, the end surface of a second positioning end 7 on the thin-wall insert 2 with the taper is in contact with a second positioning surface 9 on a pressing plate 8, the pressing plate 8 is connected with the positioning part 1 through a locking assembly, and the locking assembly penetrates through the axis of the thin-wall insert 2 with the taper and the axis of the locking assembly coincides with the axis of the thin-wall insert 2 with the taper.

Preferably, the positioning component 1 is further provided with a second positioning shaft 10 which facilitates three-jaw clamping. When the tapered thin-wall insert 2 is ground, the three claws do not directly grab the tapered thin-wall insert 2 to clamp but clamp the portion of the positioning part 1 where the second positioning shaft 10 is located, and a convex ring is arranged between the second positioning shaft 10 and the first positioning shaft 6 at an interval, so that the convex ring can prevent the three claws from contacting the tapered thin-wall insert 2 to influence the machining, the thickness of the convex ring is small, the deformation of the positioning part 1 caused by the large stress of the tapered thin-wall insert 2 can be prevented, and the machining precision of the tapered thin-wall insert 2 can be ensured.

Preferably, the first positioning end 3 is arranged at the small diameter end of the tapered thin-walled insert 2, and the second positioning end 7 is arranged at the large diameter end of the tapered thin-walled insert 2. The pressing plate 8 is in a ring shape, and the diameter of the pressing plate is larger than that of an inner hole of the large-diameter end of the tapered thin-wall insert 2 and smaller than that of an outer circle of the large-diameter end of the tapered thin-wall insert 2. If the diameter size of the pressing plate 8 is larger than the diameter of the excircle of the tapered thin-wall insert 2, the grinding machining is hindered, and the machining precision is affected, and if the diameter size of the pressing plate 8 is smaller than the diameter of the inner hole of the tapered thin-wall insert 2, the pressing plate can not play a role in fixing the tapered thin-wall insert 2 completely, so that the diameter of the pressing plate 8 is slightly smaller than the diameter of the excircle of the tapered thin-wall insert 2, the machining is not affected, and meanwhile, surface contact locking is achieved.

Preferably, the axes of the positioning part 1, the tapered thin-walled insert 2, the pressure plate 8 and the locking rod 11 are coincident. When the tools are superposed with the axes of the tapered thin-wall insert 2, the machined finished part excircle has very high precision

The first implementation mode comprises the following steps:

as shown in fig. 2, the locking assembly includes a locking rod 11 with threads at both ends, one end of the locking rod 11 is fixed to the pressure plate 8 through a pressure plate nut 12, and the other end thereof is fixed to the end of the second positioning shaft 10 through a locking nut 13. The locking rod 11 penetrates through the positioning part 1, the locking rod 11 tightly presses the tapered thin-wall insert 2 through the pressing plate 8 and the positioning part 1, so that the end faces of two ends of the tapered thin-wall insert 2 are in surface contact with the pressing plate 8 and the first positioning surface 4 respectively, and the purpose of fixing the tapered thin-wall insert 2 better can be achieved by screwing the pressing plate nut 12 and the locking nut 13.

The second embodiment:

as shown in fig. 3, the locking assembly includes a locking rod 11 with a thread at one end, the locking rod 11 fixes the pressure plate 8 at one end through a pressure plate nut 12, and the other end is fixedly connected to the end of the first positioning shaft 6. The small-diameter end of the tapered thin-wall insert 2 is in contact with the first positioning surface 4 of the positioning part 1, the large-diameter end is pressed through the pressing plate 8, one end of the locking rod 11 is directly fixed on the first positioning shaft 6, and therefore the tapered thin-wall insert 2 can be pressed only by screwing the pressing plate nut 12 at the other end of the locking rod 11, and the purpose of better fixing the tapered thin-wall insert 2 is achieved.

The tool directly clamps the end faces at two ends of the thin-wall insert 2 with the cone, and the first positioning shaft 6 is used for positioning in a mode of matching with the inner hole of the thin-wall insert 2 with the cone, so that the end faces of parts can be uniformly stressed, the traditional modes of point clamping stress and line pressing stress are changed, the deformation of the thin-wall circular face due to the fact that the thin-wall circular face is subjected to external force (such as clamping force, expansion bar expansion force and the like) when the outer circle is machined can be avoided by utilizing the surface stress, the concentricity of the outer circle is ensured, the machining concentricity of the outer circle can reach within 3 microns, the coaxiality of the outer cone can reach 0.001 degree, and the qualified rate can reach more than 98%.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. High accuracy abrasive machining frock of tapering thin wall class part excircle, its characterized in that: the positioning device comprises a positioning part (1) with a stepped end part, wherein a first positioning surface (4) which is in end surface contact with a first positioning end (3) on a tapered thin-wall insert (2) is arranged on the positioning part (1), a first positioning shaft (6) which is matched with an inner hole (5) on the first positioning end (3) is also arranged on the positioning part (1), the end surface of a second positioning end (7) on the tapered thin-wall insert (2) is in contact with a second positioning surface (9) on a pressing plate (8), the pressing plate (8) is connected with the positioning part (1) through a locking assembly, and the locking assembly penetrates through or partially penetrates through the tapered thin-wall insert (2).

2. The high-precision grinding tool for the excircle of the tapered thin-walled part according to claim 1, characterized in that: and a second positioning shaft (10) convenient for three-jaw clamping is further arranged on the positioning component (1).

3. The high-precision grinding tool for the outer circle of the tapered thin-wall part according to claim 1 or 2, characterized in that: the first positioning end (3) is arranged at the small-diameter end of the tapered thin-wall insert (2), and the second positioning end (7) is arranged at the large-diameter end of the tapered thin-wall insert (2).

4. The high-precision grinding tool for the excircle of the tapered thin-walled part according to claim 3, characterized in that: the pressing plate (8) is in a ring shape, and the diameter of the pressing plate is larger than that of an inner hole at the large-diameter end of the tapered thin-wall insert (2).

5. The high-precision grinding tool for the excircle of the tapered thin-walled part according to claim 1, characterized in that: the locking assembly penetrates through the axis of the positioning component (1).

6. The high-precision grinding tool for the outer circle of the tapered thin-wall part according to claim 5, is characterized in that: locking Assembly includes that both ends all set up screwed locking lever (11), the one end of locking lever (11) is passed through clamp plate nut (12) and is fixed clamp plate (8), and its other end passes through lock nut (13) to be fixed at the tip of second location axle (10).

7. The high-precision grinding tool for the excircle of the tapered thin-walled part according to claim 1, characterized in that: locking Assembly includes that one end sets up screwed locking lever (11), the one end of locking lever (11) is passed through clamp plate nut (12) and is fixed clamp plate (8), its other end fixed connection be in the tip of first locating shaft (6).

8. The high-precision grinding tool for the excircle of the tapered thin-walled part according to claim 1, characterized in that: the positioning part (1), the thin-walled insert with the cone (2), the pressing plate (8) and the locking assembly are overlapped in axis.