JPS6131913A - Multidimensional measuring machine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an error in precision and to reduce the cost by fixing slider guide rails whose attitdes are adjusted by an attitude adjusting means to columns so that the abutting surface contacts a pressure receiving surface and the rail is not displaced in the moving direction of a slider. CONSTITUTION:The columns 41 and 42 are supported on both guide rails 46 of a base 21 at right angles to the top surfaces of the base 21 and at a specific interval in parallel to each other, and the attitude of slider guide rail 46 laid between both columns 41 and 42 is adjusted by the attitude adjusting meand 51. Then, a bolt 68 coupling the 1st and the 2nd adjusting members 63 and 64 is inserted and the slider guide rail 46 is fixed between the 1st and the 2nd adjusting members 63 and 64 through a bolt 65. Consequently, the slider guide rail 46 is fixed to the columns 41 and 42 so that its abutting surface contacts the pressure receiving surfaces 52 of the columns and the rail is not displaced in the moving direction of the slider. Therefore, no error in precision is generated and the cost is reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to orthogonal two-dimensional measuring machines such as two-dimensional measuring machines and three-dimensional measuring machines.
The present invention relates to a multidimensional measuring machine whose measuring element can be displaced beyond the axis and which measures the shape of a workpiece based on the displacement of the measuring element.

[Background art and problems thereof] A two-dimensional or three-dimensional method in which a measuring element movable in two-dimensional or three-dimensional directions is brought into contact with the surface of the object to be measured, and the shape of the object to be measured is measured from the displacement of the measuring element. Coordinate measuring machines are used in all industrial fields because they can measure with high precision.

In such a three-dimensional measuring machine, the measuring stylus is orthogonal to each other
A mechanism that can move in the axial, Y-axis, and Z-axis directions is provided.

Conventionally, as a mechanism for moving a measuring head in three-axis directions, for example, a plurality of columns are erected on the top surface of a base, two rails extending in the Y-axis direction are provided on these columns in parallel, and there is a gap between the rails. A horizontal rack extending in the X-axis direction is provided so as to be movable in the Y-axis direction, a slider is mounted on a rail provided on the horizontal rack so as to be movable in the X-axis direction, and a spindle is mounted on this slider in the Z-axis direction. The spindle was provided so as to be slidable thereon, and a measuring element was fixed to one end of the spindle. In other words, the whole was constructed using a stacking method, and its positional reference was determined from the base or other foundation.

Therefore, the pillars must be placed perpendicular to the base and parallel to both sides, and must be finished and assembled to an accurate height, and then the structures to be supported by these pillars are sequentially , must be assembled parallel and perpendicular to the Y and Z axes, and after adjusting the assembled structure, extremely complex procedures and skill are required, such as fixing the scale parallel to the slider etc. and with a certain clearance. It was intended to be.

This means that the machining accuracy of one part has a large influence on the overall accuracy, and if there is a deviation at the initial stage,
No modifications or improvements could be made, and in the end all adjustments and assembly had to be done from the beginning. Furthermore, the overall accuracy greatly varied depending on the skill level of the assembler.

[Object of the Invention] An object of the present invention is to provide a multidimensional measuring machine that is easy to assemble and adjust, does not cause accuracy errors during use after adjustment, and is inexpensive.

[Means and effects for solving the problems 3] The present invention has the following features:
The measuring tip which is the ultimate purpose is X.

Since it is sufficient to be able to move accurately in the Y and Z axis directions, it is possible to make judgments using a probe after assembling the structure, and if there is an error, it is possible to do so without modifying the entire structure. , -X in place.

A configuration has been established that allows adjustment in at least two axes, the Y and Z axes. Furthermore, the structure is such that this adjustment means does not affect accuracy due to slider movement, collision, etc., and satisfies operational and economic requirements.

Specifically, a pair of columns are erected on a base, a slider guide rail is hung between these columns, and a slider having a measuring head is provided so as to be movable along the slider guide rail. In a multidimensional measuring machine that measures the shape of an object to be measured based on the moving displacement of a probe, the position of the slider guide rail with respect to the column is changed at the connecting portion between the slider guide rail and the column to prevent the measurement sample from moving. A posture adjustment means is provided for adjusting the position in at least two axes of the X, Y, and Z axes, and each of the pillars is provided with a pressure receiving surface that faces each other, and the slider guide rail is provided with a pressure receiving surface that corresponds to the pressure receiving surface. An adjustment member having a contact surface that is adjustable and fixed is mounted, and the slider guide rail whose attitude has been adjusted by the attitude adjustment means is mounted on the support column with the abutment surface and the pressure receiving surface in close contact with each other. It is characterized by being fixed so that it cannot be displaced in the direction of movement.

2 and [Example] Hereinafter, an example in which the present invention is applied to a three-dimensional measuring machine will be described.

FIG. 1 shows the front of the three-dimensional measuring machine, and FIG. 2 shows its side. In these figures, a base 21 formed in the shape of a substantially flat rectangular parallelepiped is provided with handles 23 each having a cross-section in the shape of a cross-section on its front and rear surfaces, and handles 23 are provided on both sides thereof to protrude at right angles from each side. Several support shafts 2
5, guide rails 26 and 27 are attached parallel to each other and along the front-rear direction (Y-axis direction) of the base 21.

The lower ends of substantially prismatic columns 41 and 42 are movably supported by both guide rails 26 and 27, respectively. Between the upper parts of both supports 41 and 42, there are a slider fine movement rail 48 made of a round bar, a slider guide rail 46 with a substantially vertically rectangular cross section, and a horizontal member 47, which are parallel to the upper surface of the base 21 and are connected to the guide rail. 31 and 32 (X-axis direction). The slider fine movement rail 48 can be finely moved in the X-axis direction by rotating a fine movement knob 49 provided on the top of the other support column 42.

The pillars 41 and 42, which respectively support the ends of the slider guide rails 46, are provided with attitude adjustment means 51 for changing the attitude of the slider guide rails 46, and have pressure receiving surfaces facing each other on their inner surfaces. 52 is formed. As shown in FIG.
four posture adjusters 53, 54, 55, 56 provided at positions facing the upper and lower portions of the front and rear surfaces, and the pillars 41, 42.
A bolt 57 is provided at a position facing the lower surface of the slider guide rail 46 and supports the lower surface of the slider guide rail 46. Each of the posture adjustment tools 5
Reference numerals 3 to 56 refer to a reinforcing nut 58 fixed to the support column 41.42, a positioning bush 59 screwed into the reinforcing nut 58 and having its tip abutted against the front or rear surface of the slider guide rail 46, and the positioning bush 59. 59 and screwed into the slider guide rail 46.

On the other hand, as shown in FIG. 4, the slider guide rail 46 is provided with U-shaped adjustment members 61 and 62 on both ends thereof so that the position can be adjusted and fixed, and the slider 71 can be moved between them. It is set freely. As shown in FIG.
A first adjustment member 63 in the shape of a letter, a second adjustment member 64 in an engineering shape that is in contact with the rear surface of the slider guide rail 46, and the slider guide rail 46 is adjusted from the top of the second adjustment member 64. A bolt 65 is screwed into the upper part of the first adjustment member 63 through the adjustment member 63. Thereby, the positions of the first and second adjustment members 63 and 64 can be adjusted with respect to the slider guide rail 46. Also,
The first and second adjustment members 63 and 64 include the support column 4.
1. A contact surface 66 corresponding to the pressure receiving surface 52 formed at 42
are formed, and the first and second adjustment members 63, 64 are arranged at the upper and lower portions of the pressure receiving surface 52 of the support column 41, 42.
A bolt insertion hole 67 is formed into which a bolt 68 for tightly fixing is inserted. Note 1. Bolt insertion hole 67
are formed somewhat larger than the bolts 68 so that the first and second adjustment members 63, 64 can be tightly fixed to the columns 41, 42 even when the slider guide rail 46 has been adjusted in attitude.

Further, as shown in FIGS. 4 and 6, the slider 71 includes four rollers 72, 73, 74, 75 that roll along the upper and lower edges of the front and rear surfaces of the slider guide rail 46, and the slider guide Two rollers 76 and 77 rolling on the upper and lower surfaces of the rail 46 are provided on both sides of the slider 71, and a scale 78 is provided inside along the longitudinal direction of the rear surface of the slider guide rail 46.
and a position detector 79 that detects the position of the slider 71.
is provided. Furthermore, a fine movement mechanism '80 is provided at the top of the slider 71 to finely move the slider 71 in the X-axis direction by movement of the slider fine movement rail 48, and a spindle support block 91 is attached to the front surface. The fine movement mechanism 80 includes a holder 81 fixed to the slider 71, a retainer 82 movably housed in the holder 81 and slidably fitted to the slider fine movement rail 48, and this retainer. 82 in a direction orthogonal to the slider fine movement rail 48 to selectively integrate the slider fine movement rail 48 and the slider 71 via the engagement element 82.

The spindle support block 91 has a spindle 92
are provided so as to be movable up and down in the direction (X-axis direction) perpendicular to the guide rails 26, 27 and the slider guide rail 46, respectively, and to lock the spindle 92 at an arbitrary position at the lower side of the side. A lock knob 93 is screwed together. A touch signal probe 94 as a measuring element is attached to the lower end of the spindle 92.

Next, the assembly and adjustment method of this embodiment will be explained. First, support columns 41.42 are supported on both guide rails 26 and 27 of base 21 at right angles to the upper surface of base 21 and parallel to each other at a predetermined interval, and then both support columns 41.4
The attitude of the slider guide rail 46 provided between the two is adjusted by an attitude adjustment means 51.

For this adjustment, first set the standard dimension product on the base 21, then loosen the ports 60 of the posture adjusters 53 to 56 as appropriate, move each positioning bushing 59 forward and backward, move the port 57 back and forth, and set the standard. Adjustments are made so that the touch signal probes 94 that are brought into contact with the dimensional products are moved accurately in the X and Z axis directions.

After this adjustment is completed, the contact surfaces 66 of the first and second adjustment members 61.62 of the adjustment members 61.62 are brought into close contact with the pressure receiving surfaces 52 of the support columns 41.42, and then the port 6 is inserted through the port insertion hole 67.
8 and insert the first and second adjustment members 63 and 84 into the support column 4.
Fixed at 1.42.

After this, the port 65 connecting the first and second adjustment members 63.64 is tightened, and the first and second adjustment members 63.6 are tightened.
A slider guide rail 46 is fixed between the holes 65 and 4 through a port 65. As a result, the slider guide rail 46
A contact surface 66 is fixed to the support column 41.42 via an adjustment member 61.62 which is tightly fixed to the pressure receiving surface 52 of 1.42.

After completing the adjustment in this way, the touch signal probe 94 is moved in the three-dimensional direction in the same manner as a conventional coordinate measuring machine, and is brought into contact with the measuring parts of the workpiece one by one. The dimensions and shape of objects can be measured.

At this time, even if the slider 71 collides with the adjustment member 61.62 due to the movement of the slider 71 in the
Since the parts are in close contact with each other, dimensional errors do not occur between them, and as a result, accuracy is not affected.

Therefore, according to this embodiment, the accuracy adjustment is performed using the touch signal probe 94 itself after the entire structure is assembled, and the adjustment is performed only by the attitude adjustment means 51, so that the assembly requires no skill. There are no problems and it can be assembled in a short time. In addition, since adjustments can be made after assembly, it is possible to significantly reduce costs while maintaining accuracy by reducing the need for high-grade machined parts and making adjustments easier.Also, it is easy to make adjustments during transportation, which improves transportability. Can be done.

In addition, the slider guide rail 46 is connected to the pillars 41 and 42 via adjustment members 61 and 62, without using the attitude adjustment means 51.
Since the slider 71 is fixed so as not to be displaceable with respect to the moving direction of the slider 71, the slider 71 is fixed by moving the slider 71.
Even if the adjustment members 61, 62 collide with each other, the adjustment members 61, 6
Since the abutting surfaces 66 of 2 are in close contact with the pressure receiving surfaces 52 of the columns 41 and 42, there is no dimensional error between them.
As a result, there is no influence on accuracy4.

In addition, since the columns 41 and 42 are supported by the side surfaces of the base 21, the entire upper surface of the base 21 can be used as the effective measurement area, and the base 21, which is made of an expensive stone surface plate, can be made smaller. Not only can the cost of the device be reduced, but the entire device can also be made smaller and require less installation space. Also,
Since there are no obstructions on the top surface of the base 21, the object to be measured is not restricted from coming in and out, and even objects to be measured that are larger than the top surface of the base 21 can be installed, and the installation posture is not limited.Furthermore, the base 21 Since the entire surface of the machine is open, the user's position is not limited, making it easy to use. Furthermore, since the entire device is miniaturized, it is extremely convenient to carry.

In the above-mentioned embodiment, the measuring element has a contact type structure, that is, the touch signal probe 94, but the measuring element in the present invention is not limited to this, and may be one using capacitance or a laser beam. It also includes so-called non-contact structures such as length measuring devices.

Furthermore, the present invention is not limited to three-dimensional measuring machines, but can also be applied to measuring machines of the type such as two-dimensional measuring machines or shape measuring machines that cannot be moved in one of two orthogonal axes.

However, it is more effective if applied to a three-dimensional measuring machine, which is large and expensive.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a multidimensional measuring machine that is easy to assemble and adjust, does not cause accuracy errors during use, and is inexpensive.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall front view, Fig. 2 is a side view of the second embodiment, Fig. 3 is a view showing the attitude adjustment means, and Fig. 4 is a slide guide rail. 5 is a sectional view taken along the line V-V" in FIG. 4, and FIG. 6 is a sectional view of the slider. 21... Base, 41. 42... Support column, 46...Slider guide rail, 51...Attitude adjustment means, 52...
- Pressure receiving surface, 61. 62... Adjustment member, 66... Contact surface, 94... Touch signal probe as a measuring point.

Claims (1)

[Claims] (1) A pair of columns are erected on a base, a slider guide rail is spanned between these columns, and a slider having a measuring point is provided so as to be movable along the slider guide rail, and the movement of the measuring point is In a multidimensional measuring machine that measures the shape of an object to be measured based on displacement, the position of the slider guide rail with respect to the support is changed at the connecting part between the slider guide rail and the support, and the X, Y of the measuring element is adjusted. and Z
Attitude adjusting means for adjusting the position in at least two axial directions is provided, and each of the two pillars is provided with a pressure receiving surface facing each other, and the slider guide rail is provided with an abutment surface corresponding to the pressure receiving surface. the slider guide rail whose position has been adjusted by the position adjustment means is displaced in the direction of movement of the slider on the column with the contact surface and the pressure receiving surface in close contact with each other; A multidimensional measuring machine characterized by being fixed in place.