CN202442676U

CN202442676U - Prismatic roundness measuring instrument for excircle surface

Info

Publication number: CN202442676U
Application number: CN201220079396XU
Authority: CN
Inventors: 徐耀良; 汪承智
Original assignee: ZHEJIANG SITONG BEARING GROUP CO Ltd
Current assignee: ZHEJIANG SITONG BEARING GROUP CO Ltd
Priority date: 2012-03-06
Filing date: 2012-03-06
Publication date: 2012-09-19
Anticipated expiration: 2022-03-06

Abstract

The utility model discloses a prismatic roundness measuring instrument for an excircle surface. The prismatic roundness measuring instrument consists of a dial plate, a dial gauge stand, a gauge head, a platform, a base and a bracket, wherein the lower part of the platform is provided with a variable-angle V-shaped device consisting of two scissor-shaped frames; an angle positioning device is arranged on the scissor-shaped frame; the scissor-shaped frame is stripped; the section of the scissor-shaped frame is in the form of a cutting edge; an installation hole is formed at one end of the scissor-shaped frame; a bolt with a spring is used for fixing the scissor-shaped frame is a screw hole on the lower part of the platform in a way that the scissor-shaped frame can rotate freely; the angle positioning device consists of a pin hole on the scissor-shaped frame, six positioning holes on the platform and two positioning pins; the six positioning holes are positioned on both sides of the central line of the platform, and are formed at the intervals of 15 degrees from the center of the pin hole to the concentric circumference of the screw hole on the platform; an included angle between the two positioning holes which are nearest to the central line of the platform is 60 degrees; and by adjusting the included angle of the scissor-shaped frame, prismatic roundness measuring actions of 60 degrees, 90 degrees and 120 degrees can be finished, and a maximum prismatic roundness error value can be obtained. The prismatic roundness measuring instrument is easy and convenient to operate, and has short measuring time and high working efficiency.

Description

Outer round surface prismatic roundness measuring instrument

Technical field

The utility model relates to a kind of outside diameter tolerance special measurement device, specifically a kind of outer round surface prismatic roundness measuring instrument.

Technical background

As everyone knows, circularity be meant contoured surface incircle or circumscribed circle and outline line on maximum radial distance between the arbitrfary point, available roundness measuring equipment is measured.In the practical application, when occurring the even number faceted pebble on the contoured surface, the data that record are commonly referred to ovality, measure the deviation from circular from of even number faceted pebble usually with ellipsograph; When occurring the odd number faceted pebble on the contoured surface, the data that record are commonly referred to prismatic roundness, measure the deviation from circular from of odd number faceted pebble usually with rib circle appearance; The measuring principle of rib circle appearance is actually three point method and measures, and two points are as anchor point, and a point is a measurement point; When external diameter is processed; The normal circular error that occurs of workpiece is 2,3,5,7,9 ribs, and the circular error of different rib numbers requires different to the angle between two anchor points; Generally need to spend three angles measuring workpieces respectively, could confirm external diameter maximum error value with 60 degree, 90 degree, 120.Therefore, measure a product, the angle between two anchor points of twice adjustment with conventional rib circle appearance; Very loaded down with trivial details, be easy to generate error, delay work and mistake; Perhaps adopt three rib circle appearance having adjusted 60 degree, 90 degree, 120 degree respectively; Measuring Time is long, and is uneconomical economically, improved production cost.

Summary of the invention

The purpose of the utility model provides a kind of outer round surface prismatic roundness measuring instrument, and is with alternative two anchor points of the V-type device of a variable-angle, simple in structure, easy to operate, time saving and energy saving, economical and practical.

The purpose of the utility model realizes through following technical scheme: this outer round surface prismatic roundness measuring instrument is made up of gauge outfit, dial framework, dial plate, support, platform and base; Base is a rectangle; Platform is an isosceles triangle, and dial framework and platform are through being bolted on the support, and dial framework, dial plate and gauge outfit are with being on the center line of platform; It is characterized in that: in the bottom of platform; Be provided with a variable-angle V-type device, variable-angle V-type device is made up of two framves of cultrating, and on the frame of cultrating, is provided with an angle positioning device.The said frame of cultrating is elongated; Its cross section is an edge of a knife shape, and frame one end of cultrating has individual mounting hole, is with the bolt of spring that two framves of cultrating are fixed in the screw of platform bottom with one; Form the V-type shape; The frame of cultrating is free to rotate, and said angle positioning device is made up of six pilot holes on the pin-and-hole on the frame of cultrating, two register pins and the platform, and six pilot holes are respectively in platform center line both sides, pin-and-hole center on the concentric circumference of platform screw; Each pilot hole 15 degree angles that are separated by are 60 degree from the angle of nearest two pilot holes of platform center line.

Use the utility model outer round surface prismatic roundness measuring instrument; Easily adjust the angle of two framves of cultrating; Just can on a measuring instrument, accomplish workpiece 60 degree angles, three prismatic roundness measurements of an angle of 90 degrees and 120 degree angles action, obtain maximum rib circular error value, simple to operation; Shorten Measuring Time, improved work efficiency and labour productivity.

Description of drawings

Fig. 1 is the structural representation of the utility model outer round surface prismatic roundness measuring instrument.

Fig. 2 is that the utility model outer round surface prismatic roundness measuring instrument A is to view.

Among Fig. 1, Fig. 2: 1, dial plate, 2, dial framework, 3, gauge outfit, 4, platform, 5, register pin, 6, the frame of cultrating, 7, bolt, 8, base, 9, pilot hole.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

In the embodiment of Fig. 1, Fig. 2, dial plate 1, dial framework 2, gauge outfit 3, base 8 and platform 4 all utilize the original parts of original outer round surface prismatic roundness measuring instrument, 15 mm-30mm place on platform 4 center lines; Be drilled with a M8 screw, the frame 6 usefulness medium carbon steel of cultrating of variable-angle V-type device are made, and frame 6 long 100mm-140mm cultrate; High 8mm-12mm, wide 12mm-18mm, one side of Width; Process edge of a knife shape, as the support of round piece, and with gauge outfit 3 places at grade; The cultrate installation aperture of frame 6 one ends is 10mm; Bolt 7 with a band spring is fixed on two framves 6 of cultrating in the platform 4 bottom screws, forms the V-type shape, and the frame 6 of cultrating is free to rotate; The pin-and-hole aperture of the other end is 6mm, mounting hole and pin-and-hole centre distance 80mm-120mm; In the center line both sides of platform 4, the pin-and-hole center to the same circumference of platform screw, three pilot holes 9 respectively are set, each pilot hole 9 15 degree angles that are separated by are 60 degree from the angle of nearest two pilot holes 9 of platform center line; Two register pins 5 be used to cultrate location of 6 three angles of frame is arranged, and register pin 5 diameters match with pin-and-hole, pilot hole 10, and its head is processed semisphere; Institute is surveyed workpiece place on the frame 6 of cultrating, be positioned at 60 degree angles with register pin 5 frame 6 of will cultrating, gauge outfit 3 touches the workpiece external diameter; One week of rotational workpieces gently; Just can accomplish one and measure action, the frame 6 of will cultrating again is positioned at respectively on two positions of an angle of 90 degrees and 120 degree angles, the duplicate measurements workpiece; Obtain three rib circular error values altogether, wherein maximal value is the actual rib circular error of workpiece value.

In order to be suitable for the workpiece calibration of size in a big way; The screw of platform 4 center line bottoms is arranged in the slide block; A chute is offered along centerline direction in platform 4 center line bottoms, and slide block can move up and down in chute, drives the frame 6 of cultrating and moves up and down; Thereby make measurement range changeable, be more suitable for practical application.

Claims

1. outer round surface prismatic roundness measuring instrument; Be made up of dial plate (1), dial framework (2), gauge outfit (3), platform (4) and base (8), base (7) is a rectangle, and platform (4) is an isosceles triangle; Dial framework (2) and platform (4) are through being bolted on the base (8); Dial plate (1), dial framework (2) and gauge outfit (3) are with being on the center line of platform (4), and it is characterized in that: the bottom in platform (4) is provided with a variable-angle V-type device; Variable-angle V-type device is made up of two framves of cultrating (6), on the frame of cultrating (6), is provided with an angle positioning device.

2. according to the said a kind of outer round surface prismatic roundness measuring instrument of claim 1; It is characterized in that: the said frame of cultrating (6) is elongated; Its cross section is an edge of a knife shape, and frame (6) one ends of cultrating have individual mounting hole, is with the bolt (7) of spring that two framves of cultrating (6) are fixed in the screw of platform (4) bottom with one; Form the V-type shape, the frame of cultrating (6) is free to rotate.

3. according to the said a kind of outer round surface prismatic roundness measuring instrument of claim 1; It is characterized in that: said angle positioning device is made up of six pilot holes (9) on the pin-and-hole on the frame of cultrating (6), two register pins (5) and the platform (4); Six pilot holes (9) are respectively in platform (4) center line both sides, pin-and-hole center on the concentric circumference of platform (4) screw; Each pilot hole (9) 15 degree angles that are separated by are 60 degree from the angle of platform (4) nearest two pilot holes of center line (9).

4. according to the said a kind of outer round surface prismatic roundness measuring instrument of claim 1; It is characterized in that: the screw of platform (4) center line bottom is arranged in the slide block; A chute is offered along centerline direction in platform (4) center line bottom; Slide block can move up and down in chute, and driving the frame (9) of cultrating can move up and down.