JPH02212079A - Centering method for layout machine - Google Patents

Abstract

PURPOSE:To accurately position a centering needle at the center of a layout reference hold by adjusting a centering head by finely moving in XY direction so that the offset amount in plus and minus is returned to zero, removing a dial gage fro the head after aligning the head center to the center of the layout reference hole and changing the centering needle. CONSTITUTION:After setting the needle of a dial gage 7 to a zero point scale this gage is rotatably fitted to the centering head of a layout machine by a centering needle fitting means by removing it from a setting jig. The whole dial gage is then rotated by manual operation at an adequate angle each in the state of the lever measuring hole of this dial gage into a layout reference hole 6 and the offset state in XY direction is measured by the fluctuations in the plus and minus directions to the zero point scale of the gage needle while watching the gage needle. The head is finely adjusted in the XY direction so that this offset amount is returned to zero and after aligning the head center to the center of the layout reference hole the dial gage is replaced to a centering needle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a method for centering a marking reference hole of a layout machine that draws a marking line on an object surface.

(Prior Art) Conventionally, it has been common practice to draw score lines on the object surface using a layout machine, but the reference point when drawing the score lines is a ten mark drawn at the reference position on the object surface. Therefore, there is a problem in that the marking reference point disappears and the reference point becomes unclear when marking.

(Problem to be Solved by the Invention) By the way, in order to prevent the ruled line reference points from disappearing, it is conceivable to apply a ruled line reference hole that is recessed in the object surface and remains until the end. When using a standard hole, it is necessary to perform centering (centering) to correctly position the centering needle of the layout machine in the center of this scribe reference hole. However, in the past, there has been no centering method that accurately performs the above-mentioned centering, and therefore, a scribing method using a scribing reference hole has not been implemented.

This invention was invented based on the above-mentioned circumstances, and its purpose is to provide a centering point for a layout machine that can accurately position the centering needle of the layout machine at the center of a scribe reference hole recessed in the object surface. This is an attempt to provide a method.

[Structure of the invention]

(Means for Solving the Problem) In order to achieve the above object, a centering method for a layout machine according to the present invention uses a removable center that is attached to a centering head 1 that is movable in the XYZ directions of a layout machine. When positioning the ejecting needle 4 at the center of the marking reference hole 6 recessed in the surface of the object 5, a lever-type dial gauge 7 capable of determining the centering n of the reference hole 6 is attached to the dial gauge setting jig 8. set the lever measuring tip 7a at the tip of this gauge to the jig gauge surface 12a, and set the rotation radius of the measuring tip 7a with respect to the gauge center line g to R which is slightly larger than the major axis r of the marking reference hole 6.
A dial gauge setting step in which the needle 7b of the dial gauge 7 is set to the 0 point scale, and the dial gauge 7 is removed from the dial gauge setting jig 8 and the centering needle is set in the centering head 1 of the layout machine. A dial gauge setting process in which the dial gauge is rotatably mounted using a mounting means, and the dial gauge 7 as a whole is set at an appropriate angle with the lever probe 7a of the dial gauge 7 attached to the centering head 1 inserted into the marking reference hole 6. α Zuzu is rotated manually, and while looking at the gauge pointer 7b, the state of misalignment in the XY force direction is determined by the fluctuations in the plus and minus directions with respect to the 0 point scale of the gauge pointer 7b, and the amount of misalignment in the plus and minus directions is determined. a centering step in which the head 1 is finely adjusted in the XY force directions so as to return to 0, and the center of the head is aligned with the center of the marking reference hole 6; and after this centering step, the head 1 is moved in two directions. The dial gauge 7 and the centering needle 4 are moved vertically to remove the dial gauge 7 from the head 1 and replace the centering needle 4.
The centering needle 4 of the layout machine can be accurately positioned at the center of the marking reference hole 6 by sequentially performing the replacement steps.

(Function) According to the centering method of the layout machine as described above,
The centering needle 1 of the layout machine can be accurately positioned at the center of the scribing reference hole 6 recessed in the object surface, and a scribing method using the indelible scribing reference hole 6 can be implemented.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. The centering method of this layout machine is such that the centering head 1 of the layout machine can be attached and detached using a butterfly bolt 3 to a holder 2 of a centering head 1 that is movable in the XYZ directions. Removable centering needle 4 that can be attached to
This is a method of positioning the centering needle 4 of the layout machine at the center of a marking reference hole 6 recessed in 5 surfaces of an object such as an automobile floor model, by sequentially performing the following steps. This is to ensure accurate positioning at the center of the hole 6.

(1) As the first step, a lever-type dial gauge 7 (conventionally known) capable of measuring the centering of the marking reference hole 6
is set in the dial gauge setting jig 8 in a horizontal state as shown in FIG. , set the rotation radius of the measuring stylus 7a with respect to the gauge center line g to an R dimension slightly larger than the hole radius r of the marking reference hole 6, and perform dial gauge setting to align the pointer 7b of the dial gauge 7 to the 0 point scale. .

The dial gauge setting jig 8 is installed on a small tester mounting base 11 having a gauge mounting hole 9a and a butterfly bolt lO for tightening the gauge in the upright wall 9, and on the horizontal surface of this small tester mounting base 11. The slide gauge 12 has a step gauge surface 12a with which the tip of the probe 7a comes into contact,
The height h of this step gauge surface 12a is, for example, the height h of the marking reference hole 6.
h when the hole diameter of
-19,71.

Therefore, the step gauge surface 12a of this slide gauge 12
Insert the lever stylus 7a at the tip of the dial gauge 7 into the
), the radius of rotation (R dimension) of the gauge stylus 7a with respect to the gauge center line g is set to 5.3 mm, which is slightly larger (by 0.3 mm) than the reference hole radius r. That will happen.

(2) As a second step, the dial gauge 7 is removed from the dial gauge setting jig 8, and the centering needle attaching means (holder 2 and butterfly bolt 3) is used to attach the centering head 1 of the layout machine to the centering head 1 of the layout machine as shown in FIG. A dial gauge set is installed rotatably as shown in the figure below.

For this reason, the holder fitting shaft portion of the dial gauge 7 is provided with an annular groove 70 in which the tip of the butterfly bolt 3 can engage.

(3) As the third step, insert the lever probe 7a of the dial gauge 7 attached to the centering head 1 into the marking reference hole 7 by lowering the lever as shown in Fig. 4, and in this state, the dial gauge 7 Manually rotate the whole body by an appropriate angle α, for example, 90 degrees with the point S shown in FIG. IIIJ is determined by the fluctuation in the plus and minus directions for
the head 1 so that it points to the minus 0.3 scale position.
is finely adjusted in the XY force directions to perform centering in which the center line g of the dial gauge 7, which is the center of the head, is aligned with the center of the marking reference hole 6.

(4) As the fourth step, after performing the centering step of (3), move the head 1 vertically to raise it in the Z direction, remove the dial gauge 7 from the head 1, and align it with respect to the holder 2. The dial gauge 7 and centering needle 4 are replaced as shown in FIG.
The centering needle 4 of the layout machine is accurately positioned at the center of the marking reference hole 6 as shown in FIG.

〔Effect of the invention〕

Since the centering method of the layout machine of the present invention is as described above, the centering needle 1 of the layout machine can be accurately positioned at the center of the score reference hole 6 recessed in the object surface, and the centering needle 1 of the layout machine disappears. It becomes possible to carry out a scribing method using the scribing reference hole 6 without any problems.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the centering method of a layout machine according to an embodiment of the present invention as a final centering process diagram, and FIGS. 2(a) and 2(b) show the first step of the centering method. A process explanatory diagram showing the dial gauge setting process as a front view and a plan view of the dial gauge set in the dial gauge setting jig, and FIG. 3 is a dial gauge setting process that is the second process of the centering method. FIG. 4 is a front view showing the dial gauge set in the centering head of the layout machine, and FIG. Figure 5 is an enlarged plan view of the marking reference hole in Figure 4, and Figure 6 is a diagram showing the fourth step of the centering method, which is the step of replacing the dial gauge and centering needle. It is a process explanatory diagram shown in a state where the needle is replaced. 1... Centering head of layout machine, 2... Holder 3... Butterfly bolt, 4... Centering needle, 5... Object, 6... Marking reference hole, r... Marker Major axis of reference hole, 7...Dial gauge, 7a...Lever probe, 7
b... Gauge pointer, g... Gauge center line, 8...
Dial gauge setting jig, ll...Small tester mounting stand, 12...Slide gauge, 12a...Step gauge surface (jig gauge surface).

Claims (1)

[Claims] When positioning a removable centering needle attached to a centering head movable in the X, Y and Z directions of a layout machine at the center of a reference hole for markings recessed in an object surface, a lever capable of measuring the centering of the reference hole is provided. Set the type dial gauge in the dial gauge setting jig, bring the tip of the lever measuring tip at the tip of this gauge into contact with the gauge surface of the jig, and set the rotation radius of the measuring tip with respect to the gauge center line from the hole radius of the scribe reference hole. Set the R dimension a little larger and set the pointer of the same dial gauge to 0.
a step of setting a dial gauge to match the point scale, a step of removing the dial gauge from the dial gauge setting jig, and rotatably attaching the dial gauge to the centering head of the layout machine using a centering needle attachment means; With the lever probe of the dial gauge attached to the output head inserted into the marking reference hole, manually rotate the entire dial gauge by an appropriate angle, and check the state of misalignment in the X and Y directions while watching the gauge pointer. Measure the fluctuation in the plus and minus directions with respect to the 0 point scale of the pointer, and adjust the head slightly in the X and Y directions so that the plus and minus misalignment amounts return to 0, and align the center of the head with the center of the marking reference hole. a centering step for alignment; and a dial gauge and centering needle replacement step for moving the head vertically in the Z direction after performing this centering step, removing the dial gauge from the head, and replacing the centering needle. A method for centering a layout machine, characterized in that a centering needle of the layout machine is accurately positioned at the center of a marking reference hole by sequentially performing the following steps.