CN212496851U

CN212496851U - Clamp for grinding thin-wall inner hole

Info

Publication number: CN212496851U
Application number: CN202020958233.3U
Authority: CN
Inventors: 晁伟鹏; 苟进锋; 李晓伟
Original assignee: Baoji Fast Gear Co Ltd
Current assignee: Baoji Fast Gear Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-09
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses an anchor clamps of grinding thin wall hole, which comprises a body, the body on install the standard component, still include first clamp plate and second clamp plate, first clamp plate cover press on the standard component, the one end of second clamp plate fix on the body, the mobilizable pressure of the other end of second clamp plate on first clamp plate, first clamp plate and second clamp plate press from both sides tight fixedly to the standard component. Utility model's anchor clamps of grinding thin wall hole can avoid the radial clamping of standard part, and control deformation range has improved outer awl size precision and surface finish, has also improved the yield of once grinding outer awl, can carry out abundant cooling, guarantees standard part required precision.

Description

Clamp for grinding thin-wall inner hole

Technical Field

The disclosure relates to the field of engineering machinery, in particular to a clamp for grinding a thin-wall inner hole.

Background

The high-efficiency outer cone detection is very important for improving the production efficiency, the comparison and measurement are common high-efficiency detection methods in field production, and the accuracy of a standard part of a calibration and detection tool in the method is the most critical. The typical high-precision thin-wall part needs to avoid radial clamping when the outer cone is ground, the common method is to use a magnetic disc for clamping, or use a three-jaw clamping design process part, or use a mandrel for clamping, but the standard part always deforms greatly after being ground due to the thin-wall part, and the precision requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anchor clamps of grinding thin wall hole solves and utilizes current anchor clamps clamping standard component, and the deformation is great all the time after the grinding, can't satisfy the technical problem of required precision.

In order to achieve the above object, the utility model discloses a following technical scheme:

the utility model provides an anchor clamps of grinding thin wall hole, includes the body, the body on install the standard component, still include first clamp plate and second clamp plate, first clamp plate cover press on the standard component, the one end of second clamp plate fix on the body, the mobilizable pressure of the other end of second clamp plate on first clamp plate, first clamp plate and second clamp plate press from both sides the fastening to the standard component and fix.

Furthermore, a through cylindrical clamping part is axially arranged in the body, a circular clamping table is formed by narrowing the lower part of the cylindrical clamping part in the height direction, and the clamping table is used for pre-positioning the standard component.

Furthermore, a step surface is formed between the clamping table and the cylindrical clamping part, a first through groove is formed in the step surface from the upper surface of the body to the surface of the clamping table, and the first through groove is used for flowing through of cutting fluid in the inner hole grinding process.

Preferably, the radius difference between the outer ring and the inner ring of the circular clamping table is 2mm, and the distance between the clamping table and the surface of the body is 1 mm.

Furthermore, the first pressing plate is in a circular ring shape, and an inner cone in contact with the outer cone of the standard part is arranged inside the first pressing plate.

Further, the inner wall of the first pressing plate is provided with a second groove in the height direction, the bottom of the outer wall of the first pressing plate is provided with a chamfer angle which avoids interference with the body, and the chamfer angle is 45 degrees.

Furthermore, a second bolt, a stud and a second nut are arranged on the second pressure plate, the bottom of the second bolt props against the body, one end of the second pressure plate is fixed on the body, and the second pressure plate is movably pressed on the first pressure plate through the stud and the second nut;

and studs and second bolts are respectively arranged along the radial increasing direction of the first pressure plate.

Optionally, the body is fixed on the workbench through a first nut and a first bolt.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses an anchor clamps of grinding thin wall hole can avoid the radial clamping of standard component, and control deformation range has improved hole size precision and surface finish, has also improved the yield of grinding hole once, can carry out abundant cooling, guarantees standard component required precision.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a cross-sectional view of a fixture for grinding thin-walled bores;

FIG. 2 is a top view of a fixture for grinding thin-walled bores;

FIG. 3 is a schematic structural diagram of a fixture body for grinding a thin-walled inner hole;

FIG. 4 is a cross-sectional view of the clamp body and an enlarged view at G;

FIG. 5 is a schematic view of the first platen;

FIG. 6 is a cross-sectional view of the first platen;

FIG. 7 is a three-dimensional view of a fixture for grinding thin-walled bores.

The reference numerals in the figures denote:

1. a body; 11. a first groove; 12. clamping a platform; 13. a first nut; 14. a first bolt; 2. a first platen; 21. a second groove; 22. chamfering; 3. a second platen; 31. a second bolt; 32. a stud; 33. a second nut; 4. a grinding wheel; 5. and (4) standard parts.

Detailed Description

It should be noted that, when describing the present invention in terms of orientation, the terms "upper end", "lower end", "top", "bottom", and the like, indicate an orientation or positional relationship only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. If the particular gesture changes, the directional indication changes accordingly. In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

The utility model discloses an anchor clamps, the standard component carries out the conical surface through the interior awl of first clamp plate and compresses tightly, and the atress is even and the clamping is reliable, and the cooling liquid can be abundant cooling, prevents standard component heat altered shape, and the precision of hole size and cylindricity has been improved in the grinding of emery wheel axial displacement, provides reliable benchmark for the outer awl grinding of one process down, has also improved the yield of grinding the hole simultaneously.

With reference to the accompanying drawings, the embodiment discloses a fixture for grinding a thin-wall inner hole, which comprises a body 1, wherein a standard part 5 is arranged on the body 1, the fixture further comprises a first pressing plate 2 and a second pressing plate 3, the first pressing plate 2 is sleeved on the standard part 5, one end of the second pressing plate 3 is fixed on the body 1, the other end of the second pressing plate 3 is movably pressed on the first pressing plate 2, and the first pressing plate 2 and the second pressing plate 3 clamp and fix the standard part 5.

In the present embodiment, a cylindrical clamping portion is axially provided therethrough, and a circular clamping base 12 is formed at a lower portion of the cylindrical clamping portion in the height direction in a narrowed manner, and the clamping base 12 is used for pre-positioning the standard 5. The through-going cylindrical clamping part is mainly used for placing the standard 5, and the grinding wheel 4 works in the through-going cylindrical clamping part.

Further, a step surface is formed between the clamping table 12 and the cylindrical clamping part, a through first groove 11 is formed in the step surface from the upper surface of the body 1 to the surface of the clamping table 12, and the first groove 11 is used for flowing through of cutting fluid in the inner hole grinding process.

In this embodiment, the difference between the radii of the outer ring and the inner ring of the circular clamping table 12 is 2mm, and the distance from the clamping table 12 to the surface of the body 1 is 1mm, so the design mainly includes the rough positioning of the standard component 5, the diameter of the outer ring of the clamping table 12 is larger than that of the conical large end of the standard component 5, and the diameter of the inner ring of the clamping table 12 is larger than that of the inner hole of the standard component 5, for example, 2mm, so as to prevent the grinding wheel 4 from colliding with a cutter during grinding. The specific size can be adjusted according to actual conditions.

Specifically, the first pressing plate 2 is in a circular ring shape, and an inner cone in contact with an outer cone of the standard part 5 is arranged inside the first pressing plate 2. The internal cone can fix the standard part 5 in the direction of the external cone of the standard part 5. Through the clamp, the standard part 5 is pressed by the conical surface through the inner cone of the first pressing plate 2, the number of freedom degree constraints of the standard part 5 is increased, the stress is uniform, the clamping is reliable, meanwhile, compared with the end face pressing, the pressing force can be reduced, and the deformation caused by overlarge stress is avoided.

Preferably, because the clearance between first clamp plate 2 and body 1 is less, so be provided with the chamfer 22 of avoiding interfering with body 1 in the outer wall bottom of first clamp plate 2, the chamfer 22 angle is 45, can effectively avoid interfering with body 11, the convenient clamping.

In addition, preferably, in order to prevent the grinding wheel 4 from colliding with the cutter, the opening of the small end of the cone of the first pressure plate 2 is larger than the inner hole of the standard part 5, so that the cutter collision can be avoided when the grinding wheel 4 is processed.

Set up second recess 21 on the inner wall direction of height of first clamp plate 2, second recess 21 all is used for flowing through the cutting fluid in hole grinding process with first recess 11, can cool off the terminal surface and the outer cone of standard 5 like this jointly, and almost all-round cooling prevents that the heat dissipation of standard 5 is insufficient to lead to the heat altered shape and then lead to the ellipse of hole and part warpage, influence the precision. Preferably, the first groove 11 and the second groove 21 are both U-shaped. So that more cutting fluid can flow through. The grinding wheel 4 moves axially for grinding, so that the accuracy of the size and the cylindricity of the inner hole is improved, a reliable reference is provided for grinding the outer cone of the next procedure, and the yield of the one-time hole grinding is improved.

In this embodiment, the second pressing plate 3 is provided with a second bolt 31, a stud 32 and a second nut 33, the bottom of the second bolt 31 abuts against the body 1, one end of the second pressing plate 3 is fixed on the body 1, the second pressing plate 3 is movably pressed on the first pressing plate 2 through the stud 32 and the second nut 33, and during adjustment, it should be noted that the second pressing plate 3 should avoid the second groove 21 on the first pressing plate 2.

The studs 32 and the second bolts 31 are respectively arranged along the radial direction of the first pressure plate 2.

The body 1 is fixed on a table of a vertical internal grinding machine by a first nut 13 and a first bolt 14 for grinding. The three-jaw chuck can also be clamped on a common internal grinding machine for use, the use methods are consistent, and the grinding effect is the same. The first nut 13 may be an M12 flange nut and the first bolt 14 may be a T-bolt.

To sum up, the utility model discloses a working process of anchor clamps of grinding thin wall hole does:

when the device is used on a common cylindrical grinding machine, the body 1 is clamped on three claws, then the B-surface run-out is detected by a dial indicator, after the end surface run-out meets the requirement, a second bolt 31, a stud 32, a second pressing plate 3 and a second nut 33 are sequentially installed, then the large conical end surface of the standard part 5 is installed on the B surface of the body 1, a corresponding clamping table 12 is used for pre-positioning the standard part 5, then a first pressing plate 2 is installed, the inner cone of the first pressing plate 2 is tightly attached to the outer cone of the standard part 5, then the pressing position of the second pressing plate 3 is adjusted to avoid a second groove 21 on the first pressing plate 2, then the second nut 33 is used for pre-pressing to primarily fix the standard part 5, then the inner hole of the standard part 5 is detected and aligned by the dial indicator, during the period, the first pressing plate 2 can be lightly knocked by a copper rod, the position of the standard part 5 is adjusted until the standard part meets the requirement, then the second nut, and finally, detecting the face A jumping of the standard part 5 by using a dial indicator, and starting grinding after the face jumping meets the requirement.

When grinding is performed on the vertical internal grinding machine, the body 1 is fixed on a workbench of the vertical internal grinding machine through the first nut 13 and the first bolt 14, and the subsequent operation is the same as the above steps.

Through the utility model discloses an anchor clamps, standard 5 compress tightly through the conical surface, and the atress is even and the clamping is reliable, and cooling liquid can be abundant cooling, prevents 5 heat deformations of standard, and the precision of hole size and cylindricity has been improved in the grinding of 4 axial displacement of emery wheel, for the outer awl grinding of lower one process provides reliable benchmark, has also improved the yield of once grinding the hole simultaneously.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides an anchor clamps of grinding thin wall hole, its characterized in that includes body (1), body (1) on install standard component (5), still include first clamp plate (2) and second clamp plate (3), first clamp plate (2) cover pressure on standard component (5), the one end of second clamp plate (3) fix on body (1), the mobilizable pressure of the other end of second clamp plate (3) on first clamp plate (2), first clamp plate (2) and second clamp plate (3) press from both sides tight fixedly to standard component (5).

2. The clamp for grinding the thin-wall inner hole according to the claim 1, characterized in that a through cylindrical clamping part is axially arranged in the body (1), a circular clamping table (12) is formed at the lower part of the cylindrical clamping part in the height direction in a narrowing mode, and the clamping table (12) is used for pre-positioning the standard component (5).

3. The clamp for grinding the thin-wall inner hole as claimed in claim 2, wherein a step surface is formed between the clamping table (12) and the cylindrical clamping part, a first through groove (11) is formed in the step surface from the upper surface of the body (1) to the surface of the clamping table (12), and the first through groove (11) is used for flowing through of cutting fluid in the grinding process of the inner hole.

4. The clamp for grinding the thin-wall inner hole as claimed in claim 2, wherein the radius difference between the outer ring and the inner ring of the circular clamping table (12) is 2 mm.

5. The clamp for grinding the thin-wall inner hole as claimed in claim 1, wherein the shape of the first pressing plate (2) is a circular ring, and an inner cone which is contacted with an outer cone of the standard component (5) is arranged inside the first pressing plate (2).

6. The clamp for grinding the thin-wall inner hole according to claim 5, wherein a second groove (21) is formed in the height direction of the inner wall of the first pressing plate (2), a chamfer (22) for avoiding interference with the body (1) is arranged at the bottom of the outer wall of the first pressing plate (2), and the angle of the chamfer (22) is 45 degrees.

7. The clamp for grinding the thin-wall inner hole is characterized in that a second bolt (31), a stud (32) and a second nut (33) are arranged on the second pressing plate (3), the bottom of the second bolt (31) is abutted against the body (1), one end of the second pressing plate (3) is fixed on the body (1), and the second pressing plate (3) is movably pressed on the first pressing plate (2) through the stud (32) and the second nut (33);

and studs (32) and second bolts (31) are respectively arranged along the radial increasing direction of the first pressure plate (2).

8. The clamp for grinding the thin-wall inner hole according to the claim 1, characterized in that the body (1) is fixed on a workbench through a first nut (13) and a first bolt (14).