CN207616154U - A kind of positioning fixture applied to arc surface angle hole machined - Google Patents

Abstract

The utility model belongs to the technical field of mechanical parts processing, in particular to a positioning fixture for processing angle holes on arc surface parts. A positioning fixture applied to the processing of angle holes on arc surfaces, the technical proposal of which is: the upper end surface of the base of the arc-shaped guide rail is an arc-shaped surface, and a positioning keyway is processed in the center; the upper and lower end surfaces of the arc-shaped mounting plate are both arc-shaped surfaces , and are equipped with a positioning keyway that is consistent with the angle of the center line of the hole; the base of the arc-shaped guide rail is installed on the worktable of the machine tool, and a side guide plate is installed on the arc surface of the upper end; the arc-shaped parts are installed on the arc-shaped mounting plate, through The positioning piece and the positioning pin are positioned and pressed by the part pressure plate; the arc-shaped mounting plate is movably installed on the upper end surface of the arc-shaped guide rail base, and the sliding guide is realized by the side guide plate; the utility model adopts an arc-shaped track structure, which can make the arc By moving the holes at each angular position of the shaped part to the vertical center line of the arc, the machining of each hole on the arc surface can be realized.

Description

A Positioning Fixture Applied to Angle Hole Machining on Arc Surface

technical field

The utility model belongs to the technical field of mechanical parts processing, in particular to a positioning fixture for processing angle holes on arc surface parts.

Background technique

At present, it is very difficult to bore angle holes on the arc surface of mechanical parts above R300, not only because the processing range of general boring machines is insufficient, the radius of the disc is less than 200mm, and the shape of the parts may have other irregularities besides large arcs. Due to the complex shape of the parts, the parts cannot be clamped and positioned; the existing indexing devices used in ordinary boring machines have large indexing errors, and the hole position accuracy is not easy to guarantee. The technical requirements of the latter are too high, and there are also problems in clamping and positioning in mass production.

Contents of the invention

The purpose of this utility model is to provide a positioning fixture for processing angle holes on arc surface parts in order to overcome the shortcomings of the existing processing technology.

The technical scheme of the utility model is: a positioning fixture applied to the machining of arc-shaped angle holes, including: arc-shaped guide rail base, arc-shaped mounting plate, positioning piece, positioning key, arc-shaped mounting plate pressing plate and positioning pin; The equipment is an arc-shaped part to be processed;

The center of the curved surface of the curved guide rail base is processed with a positioning keyway;

The inner and outer surfaces of the arc-shaped mounting plate are both arc-shaped surfaces, and the inner surface is consistent with the arc shape of the upper surface of the arc-shaped guide rail base, and the arc-shaped mounting plate can slide on the arc-shaped surface of the arc-shaped guide rail base; The outer surface of the arc-shaped mounting plate is consistent with the arc shape of the inner surface of the arc-shaped part to be processed; positioning keyway;

The arc-shaped part to be processed is installed on the outer surface of the arc-shaped mounting plate, and positioned by the positioning piece and the positioning pin;

The arc-shaped mounting plate is movably installed on the arc-shaped surface of the arc-shaped guide rail base, when the arc-shaped mounting plate slides to the position where a positioning keyway on the arc-shaped mounting plate coincides with the positioning keyway in the center of the arc-shaped surface of the arc-shaped guide rail base At the same time, the positioning key is installed in the overlapped positioning key groove to limit it in the circumferential direction, and the arc-shaped mounting plate is used to axially limit the arc-shaped mounting plate.

It also includes a side guide plate installed on the arc surface of the arc-shaped guide rail base, and the side guide plate guides the sliding of the arc-shaped installation plate on the arc-shaped surface of the arc-shaped guide rail base.

Beneficial effects: the utility model adopts an arc-shaped track structure, and the positioning keyway is designed to be consistent with the angles of the holes on the arc-shaped parts. After the positioning key is inserted into the keyway of the shaped mounting plate and the keyway of the base for positioning, the holes at each angular position of the arc-shaped part can be moved to the vertical center line of the arc, and the machining of each hole on the arc-shaped surface can be realized. The utility model has the advantages of convenient and reliable multi-angle position positioning, high positioning accuracy, good hole position consistency, time saving and labor saving, high work efficiency, can be used in common boring machines, and has good economy.

Description of drawings

Fig. 1 is the front view of structure of the present utility model;

FIG. 2 is a top view of FIG. 1 .

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and examples.

Referring to accompanying drawings 1 and 2, a positioning fixture used in the machining of arc surface angle holes, it includes: arc guide rail base 1, arc mounting plate 2, side guide plate 3, positioning piece 4, positioning key 5, arc Shaped mounting plate pressing plate 6, parts pressing plate 7 and positioning pin 8.

The upper surface of the arc-shaped guide rail base 1 is an arc-shaped surface, and the lower surface is a plane, and the center of the upper surface is processed with a positioning keyway consistent with the center line of the angle hole to be processed on the arc-shaped part (that is, a radial positioning keyway); arc-shaped installation The inner and outer surfaces of the plate 2 are arc-shaped surfaces, and its inner surface is consistent with the arc shape of the upper surface of the arc-shaped guide rail base 1, and the arc-shaped mounting plate 2 can slide on the arc-shaped surface of the arc-shaped guide rail base 1; the arc-shaped mounting plate The inner and outer surfaces of 2 are respectively provided with positioning keyways which are consistent with the angles of each angle hole to be processed on the arc-shaped part, and the outer surface of the arc-shaped mounting plate 2 is consistent with the arc of the arc-shaped part to be processed.

The arc-shaped guide rail base 1 is installed on the machine tool worktable through its lower surface, and its upper surface is equipped with a side guide plate 3 for guiding the sliding of the arc-shaped mounting plate 2;

The arc-shaped part to be processed is installed on the outer surface of the arc-shaped mounting plate 2, and the position of each hole on the arc-shaped part to be processed is consistent with the position of the positioning keyway on the outer surface of the arc-shaped mounting plate 2; The two ends of it are respectively positioned by the positioning piece 4 and the positioning pin 8, and are pressed by the part pressing plate 7 at both ends of the circumference.

The arc-shaped mounting plate 2 is movably installed on the upper surface of the arc-shaped guide rail base 1, and is slidably guided by the side guide plate 3.

When the arc-shaped mounting plate 2 slides until the last positioning keyway coincides with the positioning keyway on the arc-shaped guide rail base 1, insert the positioning key 5 to limit its circumferential movement; and fix it on the axial end surface of the arc-shaped guide rail base 1 The arc-shaped mounting plate pressing plate 6 compresses the arc-shaped mounting plate 2, and axially limits it, and ensures that the two arc-shaped surfaces fit seamlessly when pressing. Then find the hole position processing hole of the arc part to be processed according to the positioning keyway on the outer circumferential surface of the arc mounting plate 2. After the processing is completed, unclamp the arc mounting plate pressing plate 6, pull out the positioning key 5, and install the arc. Plate 2 continues to slide along the arc-shaped guide rail base 1. When the arc-shaped mounting plate 2 slides until its upper and lower positioning key grooves coincide with the positioning key grooves on the arc-shaped guide rail base 1, insert the positioning key 5 again and press it with the arc-shaped mounting plate pressing plate 6. Tighten the arc-shaped mounting plate 2, thereby processing the holes of the arc-shaped parts to be processed successively.

Therefore, the positioning fixture can realize the machining of the angle hole on the arc surface on the ordinary boring machine, and determine the arc mounting plate 2 and the arc guide rail base 1 arc size according to the arc size of the part, so that the part can be clamped once , All the angle holes can be processed after several slidings, not only the positioning accuracy is high, but also the positioning and clamping is fast, convenient, economical and practical.

To sum up, the above are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (3)

1. a kind of positioning fixture applied to arc surface angle hole machined, which is characterized in that including：Arc-shaped guide rail pedestal (1), arc Shape mounting plate (2), locating plate (4), positioning key (5), arc mounting plate pressing plate (6) and positioning pin (8)；Peripheral equipment is to be added The arc part of work；

The center of the arcwall face of the arc-shaped guide rail pedestal (1) is machined with positioning spline；

The surfaces externally and internally of the arc mounting plate (2) is arcwall face, the upper surface arc of inner surface and arc-shaped guide rail pedestal (1) Shape is consistent, and the arc mounting plate (2) can be slided on the arcwall face of arc-shaped guide rail pedestal (1)；The arc mounting plate (2) Outer surface it is consistent with arc part inner surface arc to be processed；It is set respectively on the surfaces externally and internally of the arc mounting plate (2) There is the positioning spline consistent with each angle orifice angle on arc part arc surface to be processed；

Arc part to be processed is mounted on the outer surface of the arc mounting plate (2), and passes through the locating plate (4) and described Positioning pin (8) positions；

The arc mounting plate (2) is movably arranged on the arcwall face of the arc-shaped guide rail pedestal (1), when the arc mounting plate (2) when sliding into that a positioning spline is overlapped with the positioning spline at arc-shaped guide rail pedestal (1) the arcwall face center thereon, pass through The positioning key (5) is installed in the positioning spline of coincidence, circumferential limit is carried out to it, the arc mounting plate pressing plate (6) is used in combination Axial limiting is carried out to the arc mounting plate (2).

2. being applied to the positioning fixture of arc surface angle hole machined as described in claim 1, which is characterized in that further include installation In the side guide plate (3) of arc-shaped guide rail pedestal (1) arcwall face, the side guide plate (3) is to arc mounting plate (2) described Sliding on arc-shaped guide rail pedestal (1) arcwall face play the guiding role.

3. being applied to the positioning fixture of arc surface angle hole machined as claimed in claim 1 or 2, which is characterized in that further include Part pressing plate (7), the part pressing plate (7) are used to arc part to be processed being pressed on arc mounting plate (2) appearance Face.