CN110695895A

CN110695895A - Mandrel positioning device

Info

Publication number: CN110695895A
Application number: CN201911106226.9A
Authority: CN
Inventors: 高飞; 李新; 和玉洁; 韩凤祥
Original assignee: Research Institute of Physical and Chemical Engineering of Nuclear Industry
Current assignee: Research Institute of Physical and Chemical Engineering of Nuclear Industry
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-01-17

Abstract

The invention discloses a mandrel positioning device which comprises a bottom plate, wherein a mandrel is placed on the bottom plate and is connected with the bottom plate through a pair of symmetrically arranged pressing plates and screws, a positioning tool is covered outside the mandrel, the lower end of the positioning tool is buckled with the bottom plate, and the upper end of the mandrel penetrates through a center hole in the top surface of the positioning tool. The invention can realize the fast and accurate positioning of the mandrel through one-time assembly on the premise of not changing the structure of the mandrel, reduces the difficulty of mandrel positioning, saves a large amount of manpower resources, and is suitable for mandrel positioning of a mandrel boss which changes in a certain size range.

Description

Mandrel positioning device

Technical Field

The invention belongs to the field of positioning devices, and particularly relates to a mandrel positioning device.

Background

The core shaft is a rotary part, has high dimensional precision, is mainly used for assembling with other parts, plays a role in positioning other parts, and is widely applied to precision test devices. The positioning and mounting precision of the mandrel is guaranteed, and the assembly precision of the whole testing device is guaranteed. Usually, the mandrel needs to be positioned in the form of processing bolt holes on the mandrel, the mandrel to be assembled can meet the requirement of positioning accuracy only by detecting and assembling for many times, the assembling efficiency is low, no device can complete the positioning of high accuracy and high efficiency of the mandrel part without changing the structure of the mandrel at present, and therefore a positioning device with high accuracy and high efficiency suitable for the mandrel is needed.

Disclosure of Invention

The invention is provided to overcome the defects in the prior art, and aims to provide a mandrel positioning device.

The invention is realized by the following technical scheme:

a mandrel positioning device comprises a bottom plate, a mandrel is placed on the bottom plate and is connected with the bottom plate through a pair of pressing plates and screws which are symmetrically arranged, a positioning tool is covered outside the mandrel, the lower end of the positioning tool is buckled with the bottom plate, and the upper end of the mandrel penetrates through a center hole in the top surface of the positioning tool.

In the above technical solution, the bottom plate is a disk-shaped structure, and four screw holes are formed in the middle of the bottom plate and are distributed in a rectangular shape. The screw hole on the bottom plate is used for connecting with the pressure plate;

in the above technical scheme, the top surface of the pressing plate is provided with two vertically arranged through holes, and the side wall of the upper end of the pressing plate extends outwards to form a pressing plate boss.

In the above technical scheme, the positioning tool is a hollow stepped shaft structure with a small top and a large bottom, a positioning groove is formed on the bottom surface, and a central hole is formed on the top surface.

In the above technical solution, the inner diameter of the positioning groove is matched with the outer diameter of the bottom plate.

In the above technical solution, the circumferential wall of the small diameter end of the positioning tool is provided with a symmetrically arranged window.

In the above technical scheme, the hole wall of the central hole extends upwards to form a convex ring.

The invention has the beneficial effects that:

the invention provides a mandrel positioning device which can realize the rapid and accurate positioning of a mandrel through one-time assembly on the premise of not changing the structure of the mandrel, reduces the difficulty of mandrel positioning, saves a large amount of manpower resources, and is suitable for mandrel positioning of a mandrel boss which changes in a certain size range.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a schematic structural view (oblique view) of the positioning tool of the present invention;

FIG. 3 is a schematic structural view (front view) of a positioning tool of the present invention;

FIG. 4 is a schematic view of the construction of the base plate according to the present invention;

FIG. 5 is a schematic structural view of a mandrel according to the present invention;

FIG. 6 is a schematic view of the structure of the pressure plate of the present invention.

Wherein:

1 mandrel 2 bottom plate

3 positioning tool 4 pressing plate

5 screw 6 positioning groove

7 center positioning hole 8 screw hole

9 mandrel boss and 10 pressing plate boss

11 via 12 fenestrations

13 convex ring.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions of the mandrel positioning device of the present invention are further described below by referring to the drawings of the specification and the specific embodiments.

As shown in fig. 1, a mandrel positioning device comprises a bottom plate 2, a mandrel 1 is placed on the bottom plate 2 and is connected with the bottom plate 2 through a pair of pressing plates 4 and screws 5 which are symmetrically arranged, a positioning tool 3 is covered outside the mandrel 1, the lower end of the positioning tool is buckled with the bottom plate 2, and the upper end of the mandrel 1 penetrates through a center hole 7 on the top surface of the positioning tool 3.

As shown in fig. 4, the bottom plate 2 is a disk-shaped structure, and four screw holes 8 are formed in the middle of the bottom plate and are distributed in a rectangular shape. The screw hole on the bottom plate is used for connecting with the pressure plate;

as shown in fig. 6, two vertically disposed through holes 11 are formed on the top surface of the pressing plate 4, and the upper side wall thereof extends outwards to form a pressing plate boss 10. The pressing plate 4 is of an inverted L-shaped structure. The clamp plate boss 10 is arranged above the mandrel boss, and the screw 5 penetrates through the hole 11 and the screw hole 8 to fixedly connect the clamp plate 4 with the base plate 2, so that the mandrel 1 is fixed.

As shown in fig. 2 and 3, the positioning tool 3 is a hollow stepped shaft structure with a small top and a large bottom, a positioning groove 6 is formed on the bottom surface, and a central hole 7 is formed on the top surface. The inner diameter of the positioning groove 6 is matched with the outer diameter of the bottom plate 2. The circumference wall of the small diameter end of the positioning tool 3 is provided with a symmetrically arranged window 12. The hole wall of the central hole 7 extends upwards to form a convex ring 13.

As shown in fig. 5, the mandrel 1 to which the present invention is applied has an inverted T-shaped stepped shaft structure, and a mandrel boss 9 is formed at the lower end thereof.

The use method of the invention comprises the following steps:

placing the soleplate 2 horizontally;

(ii) placing the mandrel 1 on the base plate 2;

(iii) passing the upper end of the mandrel through the central bore 7 of the fixture 3;

(iv) moving the positioning tool 3 and the mandrel 1 together until the groove wall of the positioning groove 6 of the positioning tool 3 is completely attached to the outer circumferential wall of the upper end of the bottom plate 2;

(v) placing the press plate bosses 10 of the two press plates 4 on the mandrel bosses 9, moving the press plates 4, and aligning the through holes 11 on the press plates 4 with the screw holes 8 on the base plate 2;

(vi) connecting the base plate 2 with the pressing plate 4 by using a screw 5 to fix the mandrel 1;

(vii) the positioning tool 3 is vertically taken down upwards, and the positioning of the mandrel 1 is completed.

The fast and accurate positioning of the mandrel is realized through one-time assembly, the difficulty of mandrel positioning is reduced, and a large amount of manpower resources are saved.

The invention can realize the fast and accurate positioning of the mandrel through one-time assembly on the premise of not changing the structure of the mandrel, reduces the difficulty of mandrel positioning, saves a large amount of manpower resources, and is suitable for mandrel positioning of a mandrel boss which changes in a certain size range.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims

1. A mandrel positioning device is characterized in that: including bottom plate (2), dabber (1) is placed on bottom plate (2) and is connected both through clamp plate (4) and screw (5) that a pair of symmetry set up, and dabber (1) outside is located in cover to location utensil (3), and lower extreme and bottom plate (2) lock, and centre bore (7) of location utensil (3) top surface are passed to dabber (1) upper end.

2. The mandrel positioning apparatus of claim 1 wherein: the bottom plate (2) is of a disc-shaped structure, and four screw holes (8) which are distributed in a rectangular shape are formed in the middle of the bottom plate.

3. The screw hole on the bottom plate is used for connecting with the pressure plate;

the mandrel positioning apparatus of claim 1 wherein: two vertically-arranged through holes (11) are formed in the top surface of the pressing plate (4), and the side wall of the upper end of the pressing plate extends outwards to form a pressing plate boss (10).

4. The mandrel positioning apparatus of claim 1 wherein: the positioning tool (3) is of a hollow stepped shaft structure with a small upper part and a large lower part, a positioning groove (6) is formed on the bottom surface, and a central hole (7) is formed on the top surface.

5. The mandrel positioning apparatus of claim 4 wherein: the inner diameter of the positioning groove (6) is matched with the outer diameter of the bottom plate (2).

6. The mandrel positioning apparatus of claim 4 wherein: the circumference wall of the small diameter end of the positioning tool (3) is provided with symmetrically arranged windows (12).

7. The mandrel positioning apparatus of claim 4 wherein: the hole wall of the central hole (7) extends upwards to form a convex ring (13).