CN202702231U

CN202702231U - Center marking tool

Info

Publication number: CN202702231U
Application number: CN 201220254739
Authority: CN
Inventors: 吴永旭; 彭学斌; 姜娟; 张永泉
Original assignee: Shanghai East Pump Group Co Ltd
Current assignee: Shanghai East Pump Group Co Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2013-01-30
Anticipated expiration: 2022-05-31

Abstract

The utility model discloses a center marking tool which comprises a steel plate and two cylindrical pins. One end of the steel plate is provided with a round face. A hole is drilled at the center (O') of the round face. A straight line (OO') is made at the other end of the steel plate. Two holes at equal distances from the straight line (OO') are made on the steel plate in a direction perpendicular to the straight line (OO'). The two holes are fitted with the cylindrical pins. A gap is made near the center (O') of the round face along the straight line (OO'). When the marking tool is used, center of a workpiece can be marked by moving the two cylindrical pins to be close to the outer cylindrical surface of the workpiece, making a line along the straight line (OO') with a marking pin and moving the marking pin by a certain distance along the periphery of the workpiece to make another line so as to obtain an intersection of the two lines. The problem that marking center lines on end faces of disk workpieces is inaccurate, time-consuming and labor-consuming is solved, precision and efficiency in line marking are improved, and the defect that the traditional marking method is low in efficiency and precision is overcome.

Description

A kind of center of circle scoring tool

Technical field

The utility model relates to mechanical device, is specifically related to a kind of center of circle scoring tool.

Background technology

Traditional flange surface line with processing method is: at first use the gauges such as compasses, ruler, set square on workpiece, reserve the line radius of compasses with the radius size of disk, several circular arcs are drawn at edge take disk as the center of circle, the intersection point of several circular arcs is exactly the workpiece center of circle that will look for.

Because compasses are when drawing arc take disk border as the center of circle, the center of circle of planing is bad determines that accurately several circular arcs of therefore drawing often intersect less than a bit, so the center is difficult to accurately find.So this traditional scribble method line precision is low, wastes time and energy, efficient is not high.

The utility model content

The technical problems to be solved in the utility model provides a kind of center of circle scoring tool, improves line speed, the line precision of the scribble method of alignment point on disk, increases work efficiency, and reduces manufacturing cost.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of center of circle scoring tool, formed by steel plate and two straight pins, one end of described steel plate is circular face, the circular face center O ' brill one hole, process a straight line OO ' at the steel plate other end, be drilled with equidistant two holes with straight line OO ' with the perpendicular direction of straight line OO ' on the described steel plate, described two holes and round pin cooperate to be installed.

Preferably, described along straight line OO ' direction near the circular face center O ' locate to process a breach.

Preferably, described steel plate is 5 millimeters thick.

By technique scheme, the beneficial effects of the utility model are:

Solve the disk workpiece end face and drawn the problem that center line is inaccurate, waste time and energy, Novel tooling can well draw center line, mark parallel lines at the linear pattern surface of the work at the round piece end face, improve precision and the operating efficiency of line, overcome the low and low defective of precision of traditional scribble method efficient.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is cutaway view of the present utility model.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

See figures.1.and.2, a kind of center of circle scoring tool is comprised of steel plate and two straight pins of 5 millimeters thick.

One end of steel plate is circular face, in the circular face center O ' hole of boring a Φ 6, at steel plate processing one straight line OO ', this straight line OO ' will be by the center O in hole ', again in the circular face center O ' a side, draw a line CC ' vertical with OO ' straight line, on this line CC ', bore two and the equidistant Φ of straight line OO ' 5 holes, these two holes and round pin cooperate to be installed.

Round pin one end diameter is 5 millimeters, and length is identical with steel plate thickness, cooperates with hole on the steel plate;

Round pin other end diameter is 8 millimeters, and length is difficult for long, as long as almost can with the thickness of workpiece that needs line.

Processing a width along straight line OO ' line is 5 millimeters breach, when this breach is only rule for scriber by arranging.

During use, as long as two straight pins are leaned against on the outer round surface of workpiece,, move a position along the workpiece circumference again and draw a line again along the standardized diatom in straight line OO ' limit with scriber, the intersection point of two lines is the center of workpiece.

In like manner, round pin is leaned against on the workpiece of straight line, along the setting-out of BB sideline, this frock also can draw the parallel lines with the workpiece straight line.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. center of circle scoring tool, it is characterized in that: formed by steel plate and two straight pins, one end of described steel plate is circular face, the circular face center (O ') brill one hole, process a straight line (OO ') at the steel plate other end, perpendicular direction is drilled with and equidistant two holes of straight line (OO ') with straight line (OO ') on the described steel plate, and described two holes and round pin cooperate to be installed.

2. a kind of center of circle according to claim 1 scoring tool is characterized in that: describedly locate to process a breach along straight line (OO ') direction near circular face center (O ').

3. a kind of center of circle according to claim 1 scoring tool, it is characterized in that: described steel plate is 5 millimeters thick.