JP2022084227A - Dimension inspection method, scale for dimensional inspection, and method of manufacturing seal member for machine tool - Google Patents

Abstract

To provide an inspection method capable of easily and accurately performing inspection as to whether or not a size to be evaluated of the inspected object matches a standard value of a product to be inspected in a short time.SOLUTION: A dimension inspection method includes the steps of: preparing a scale for dimensional inspection having a reference diagram in which a product to be inspected viewed from one direction is drawn in a product size, and the inspected object in which a size to be evaluated is determined whether or not to match a standard value of the product to be inspected; comparing a shape of the inspected object viewed from one direction with a reference diagram by overlapping the inspected object on the reference diagram drawn on the scale for dimensional inspection; and determining whether or not the size to be evaluated of the inspected object matches the standard value of the product to be inspected.SELECTED DRAWING: Figure 4

Description

The present invention relates to a dimensional inspection method, a dimensional inspection scale used in the dimensional inspection method, and a method for manufacturing a seal member for a machine tool including the dimensional inspection method.

Machine tools such as lathes and machining centers are the most basic machine tools widely used in the manufacturing industry.In these machine tools, the drive mechanism and the like are protected from chips and coolant (cutting oil), and chips and chips are used. Various sealing members (sometimes referred to as wiper members) such as lip seals, slide seals, telescopic seals, and cover seals are used to remove coolant (see, for example, Patent Documents 1 to 6). .. The seal member is usually provided with a mounting hole used to attach the seal member to a machine tool.
The seal member is designed for each machine tool, and may be used in combination with a plurality of types of machine tool seal members for one machine tool.
Therefore, there are members having various dimensions as seal members for machine tools. Each machine tool seal member needs to be manufactured with high dimensional accuracy.

International Publication No. 2017/11275 Japanese Unexamined Patent Publication No. 2019-30936 Japanese Unexamined Patent Publication No. 2017-189863 Japanese Patent No. 6174175 International Publication No. 2017/073405 International Publication No. 2015/11030

The seal member is inspected for whether or not the dimensions meet the standard values (whether or not it is within the range of the dimensional tolerance), and those that pass the inspection are shipped as products.
In the inspection of the seal member, for example, the length of the outer shape of the seal member and the position and diameter of the mounting hole are inspected.
The inspection of these sealing members can be performed using, for example, a caliper or a micrometer. However, these methods are inspection methods that require a considerable amount of time and man-hours.

In addition, while calipers and micrometer are tools for obtaining specific numerical values of dimensions, when determining whether or not the dimensions of a product match the standard values, specific numerical values of dimensions are used. Was not always necessary information.

The present invention has been made in view of such circumstances, and it is possible to easily determine in a short time whether or not the dimensions of a product to be inspected, such as a seal member for a machine tool, conform to a standard value. The purpose is to provide a method that can be used.

(1) The dimensional inspection method of the present invention includes a dimensional inspection scale having a reference drawing in which the product to be inspected viewed from one direction is drawn with the product dimensions.
Prepare an inspected object for which it is judged whether or not the dimensions to be evaluated conform to the standard values of the above-mentioned products to be inspected.
The object to be inspected is superimposed on the reference drawing drawn on the scale for dimensional inspection, and the shape of the object to be inspected viewed from one direction is compared with the reference drawing to compare the object to be inspected. It is determined whether or not the evaluation target dimension conforms to the standard value of the inspection target product.

In the above dimensional inspection method, the evaluation target dimension of the inspected object is the standard of the product to be inspected by simply superimposing the inspected object on the figure drawn on the dimensional inspection scale without actually measuring the specific numerical value of the dimension. It is possible to judge whether or not the value is matched. Therefore, the dimensional inspection of the inspected object can be easily and accurately performed in a short time.
Further, since the scale for dimensional inspection can be manufactured at low cost for each object to be inspected, the dimensional inspection method is particularly suitable as a dimensional inspection method for high-mix low-volume products.
In the present specification, the product to be inspected is referred to as an inspected product before it is determined whether or not the dimensions to be evaluated conform to the standard values of the product to be inspected. Therefore, the object to be inspected includes those whose dimensions to be evaluated match the standard values of the products to be inspected and those whose dimensions do not match the standard values of the products to be inspected.

(2) In the dimensional inspection method of (1) above, the reference drawing shows the range of the dimensional tolerance of the dimensional to be evaluated in the product to be inspected.
It is preferable to determine whether or not the evaluation target dimension of the inspected object is within the range of the dimensional tolerance, and if it is within the range, it is determined that the evaluation target product conforms to the standard value of the inspected product.
In this case, the dimensional inspection can be easily performed in consideration of the dimensional tolerance of the product to be inspected.

(3) In the dimension inspection method of (1) or (2) above, it is preferable that at least two evaluation target dimensions in the inspection target product are evaluated at the same time.
In this case, it is possible to determine whether or not the evaluation target dimension of the inspected object conforms to the standard value of the inspected product with a small number of man-hours.
In this evaluation, evaluating the evaluation target dimensions at the same time does not mean that the evaluation times are exactly the same, but means that the evaluation is made in one evaluation process.

(4) In the dimensional inspection method according to any one of (1) to (3) above,
The product to be inspected is a machine tool seal member having a flat surface constituting a mounting surface to the machine tool and a hole for mounting to the machine tool.
The scale for dimensional inspection is a reference of the seal member for a machine tool as viewed in the direction normal to the plane constituting the mounting surface to the machine tool and from the side opposite to the plane toward the plane side. It is preferable to have a figure.
The above-mentioned seal member for machine tools is suitable as an inspection target product to be evaluated by the dimensional inspection method of the present invention.

(5) The scale for dimensional inspection of the present invention is
It is a scale for dimensional inspection to judge whether the dimensional to be evaluated of the object to be inspected conforms to the standard value of the product to be inspected.
The product to be inspected from one direction has a reference diagram drawn with product dimensions,
The reference drawing shows the range of dimensional tolerances of the dimensions to be evaluated in the product to be inspected.
The dimensional inspection scale is suitable as a dimensional inspection scale used in the dimensional inspection methods (1) to (4).
Further, the scale for dimensional inspection can be prepared at low cost for each product to be inspected.

(6) In the scale for dimensional inspection of (5) above,
The product to be inspected is a machine tool seal member having a flat surface constituting a mounting surface to the machine tool and a hole for mounting to the machine tool.
It is preferable to have a reference drawing of the machine tool seal member viewed in the direction normal to the plane constituting the mounting surface to the machine tool and from the side opposite to the plane toward the plane side. ..
The machine tool seal member is suitable as an inspection target product to be evaluated using the dimensional inspection scale.

(7) The method for manufacturing a seal member for a machine tool according to the present invention is as follows.
A method for manufacturing a machine tool seal member having a flat surface constituting a mounting surface to a machine tool and a hole for mounting to the machine tool.
The step of selecting a machine tool seal member whose evaluation target dimension matches the standard value is included by the dimension inspection method described in (4) above.
The above-mentioned method for manufacturing a seal member for a machine tool is suitable as a method for efficiently manufacturing a seal member for a machine tool whose dimensions to be evaluated match the standard values.

According to the present invention, it is possible to easily and accurately inspect whether or not the dimensions of the object to be inspected match the standard values of the product to be inspected in a short time.
Further, by incorporating the above inspection into the manufacturing process of the machine tool seal member, it is possible to efficiently manufacture the machine tool seal member whose evaluation target dimensions match the standard values.

It is a partial perspective view which shows an example of the seal member for a machine tool to be inspected in embodiment of this invention. (A) is a front view of the machine tool seal member shown in FIG. 1, (b) is a side view of the machine tool seal member shown in FIG. 1, and (c) is a work shown in FIG. It is a rear view of the seal member for a machine. It is a figure which shows the state which attached the seal member for a machine tool shown in FIG. 1 to a machine tool. It is a top view which shows an example of the scale for dimensional inspection which concerns on embodiment of this invention. It is a figure for demonstrating the dimensional inspection method which concerns on embodiment of this invention. It is a partial perspective view which shows another example of the seal member for a machine tool to be inspected in embodiment of this invention. It is a top view which shows another example of the scale for dimension inspection which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Here, an embodiment of the present invention will be described with the seal member for a machine tool as a product to be inspected.
In the embodiment of the present invention, the product to be inspected is not limited to the seal member for machine tools.

(First Embodiment)
<Seal member for machine tools>
FIG. 1 is a partial perspective view showing an example of a seal member for a machine tool, which is a product to be inspected according to the present embodiment. 2A is a front view of the machine tool seal member 30 shown in FIG. 1 as viewed from the direction of arrow IIA, and FIG. 2B is a front view of the machine tool seal member 30 of FIG. 1 in the direction of arrow IIB. 2 (c) is a rear view of the machine tool seal member 30 of FIG. 1 as viewed from the direction of arrow IIC. FIG. 3 is a diagram showing a state in which the machine tool seal member 30 shown in FIG. 1 is attached to the machine tool.

As shown in FIG. 1, the machine tool seal member 30 of the present embodiment includes an elastic member 31, a support member 41, and a bending auxiliary member 51.
The elastic member 31 is a flat plate-shaped member in a natural state before being joined to the bending auxiliary member 51. The elastic member 31 is a member arranged between the mounting portion 65 of the machine tool 60 and the support member 41 when the machine tool seal member 30 is attached to the machine tool.
The elastic member 31 includes a fixing portion 32 facing the support surface 41a of the support member 41, and a lip portion 33 extending from the fixing portion 32 to the tip side (contact side with the sliding surface of the machine tool). The lip portion 33 includes the edge portion 34 and is in a curved state.
The elastic member is made of a rubber composition containing 31, NBR (nitrile butadiene rubber), urethane elastomer, fluororubber, silicone rubber, EPDM (ethylene propylene diene rubber) and the like.

The support member 41 is a member for attaching the machine tool seal member 30 to the machine tool 60 while supporting the elastic member 31.
The support member 41 is erected on a flat plate-shaped support portion 42 having a support surface 41a facing the front surface 31a of the elastic member 31 and on the side opposite to the support surface 41a side of the support portion 42, and is an elastic member during use. It has a flat plate-shaped protective portion 43 for protecting the front surface 31a of 31 from chips and the like.
The support member 41 is made of, for example, a bent steel plate, an aluminum plate, or the like. The bending angle θ1 of the support member 41 (see FIG. 2B) may be, for example, about 80 to 150 °.

The bending auxiliary member 51 is a member that supports the bending of the lip portion 33 of the elastic member 31.
The machine tool seal member 30 provided with the bending auxiliary member 51 is less likely to invert the lip portion 33 of the elastic member 31 during use. Further, since it is curved before being attached to the machine tool 60, there is no mistake in the direction in which the machine tool seal member 30 is attached when the machine tool 60 is attached.
The bending auxiliary member 51 has a flat plate-shaped main body portion 52 and a flat plate-shaped auxiliary portion 53. The auxiliary portion 53 extends diagonally from the lower end portion of the main body portion 52 toward the curved side (support member 41 side) of the elastic member 31.
The bending auxiliary member 51 is made of, for example, a bent steel plate, an aluminum plate, or the like. The bending angle θ2 of the bending auxiliary member 51 (see FIG. 2B) may be, for example, about 15 to 60 °.

The elastic member 31 and the support member 41 are joined via an adhesive layer 37 provided between the front surface 31a of the elastic member 31 and the support portion 42 of the support member 41.
The elastic member 31 and the bending auxiliary member 51 are joined via an adhesive layer 38 provided between the main body portion 52 of the bending auxiliary member 51 and a part of the back surface 31b of the elastic member 31.

As shown in FIG. 3, the machine tool seal member 30 is attached to the mounting portion 65 of the machine tool 60 so that the bending auxiliary member 51, the elastic member 31, and the support member 41 are arranged in order from the mounting portion 65 side. Used.
The machine tool seal member 30 is attached to the machine tool 60 using bolts 66 and nuts 67. Therefore, the machine tool seal member 30 is provided with a mounting hole 36 for inserting the bolt 66 at a predetermined position.
The machine tool seal member 30 attached to the machine tool 60 is in sliding contact with the sliding surface 61 of the machine tool 60 at the edge portion 34 of the elastic member 31.

<Manufacturing method of seal members for machine tools>
In the machine tool seal member 30, for example, the elastic member 31, the support member 41, and the bending auxiliary member 51 are separately manufactured, and then the members are joined via the adhesive layers 37 and 38 in a predetermined positional relationship. It is manufactured through the manufacturing step A.
The support member 41 and the bending auxiliary member 51 can be manufactured, for example, by cutting a steel plate or the like into a predetermined shape and then bending the steel plate or the like.
The elastic member 31 can be manufactured, for example, by cutting a sheet-like material made of the rubber composition containing the above-mentioned rubber component into a predetermined shape.

Further, after preparing a support member, a bending auxiliary member and an elastic member having a sufficiently long length in the longitudinal direction (in the left-right direction in FIG. 2A), these are joined via an adhesive layer to form a machine tool. The machine tool seal member 30 may be manufactured through a manufacturing step B in which a long object of the sealing member for machine tool is manufactured and then cut so that the dimension in the longitudinal direction becomes a predetermined dimension.
Regardless of which of the manufacturing steps A and B is performed, the same member as the machine tool seal member 30 shown in FIG. 1 is provided, and the machine tool seal member 30 before the dimensional inspection according to the present embodiment is performed. ′ Can be produced.

The machine tool seal member 30'manufactured through the manufacturing process A and the manufacturing step B, which is the object to be inspected, usually has dimensions to be evaluated that match the standard values of the machine tool sealing member 30. , Those that do not meet the standard value are mixed.
Therefore, in the present embodiment, the machine tool seal member 30'manufactured through the manufacturing process A and the manufacturing process B is used as the object to be inspected, and the evaluation target dimension is the machine tool sealing member by the dimension inspection method described later. A dimensional inspection process is performed to select a machine tool seal member 30'that meets the standard value of 30.
As a result, it is possible to manufacture the machine tool seal member 30 whose dimensions to be evaluated meet the standard values.

In the present embodiment, the machine tool seal member 30'is used as an object to be inspected, and the length of the machine tool seal member 30'in the longitudinal direction and the position and diameter of the mounting hole 36'are the specifications of the machine tool seal member 30. Determine if it matches the value.

<Scale for dimensional inspection>
FIG. 4 is a plan view showing an example of a scale for dimensional inspection according to the present embodiment. In FIG. 4, the direction of the arrow X is the upward direction, and the direction of the arrow Y is the left direction.
The dimensional inspection scale 10 according to the present embodiment has a reference drawing 12 on the front surface of the paper 11 in which the machine tool seal member 30 viewed from one direction is drawn with the product dimensions. Reference numeral 12 is a view when the machine tool seal member 30 is viewed from the support member 41 side toward the bending auxiliary member 51 side (direction of arrow IIA in FIG. 1). In the reference diagram 12, the machine tool seal member 30 which is the product to be inspected is drawn with the product dimensions (that is, at a scale of 1: 1).

In the embodiment of the present invention, the inspection target product (for example, a seal member for a machine tool) manufactured according to the design dimensions is drawn on the reference drawing.
Further, in the embodiment of the present invention, the above-mentioned one direction in which the product to be inspected is viewed in order to acquire the shape drawn on the reference drawing is not particularly limited, and is appropriately determined according to the shape of the product to be inspected and the dimensions to be evaluated. Just set it.

Reference FIG. 12 shows a range of dimensional tolerances of the dimensions to be evaluated in the machine tool seal member 30.
Here, the range 14 of the dimensional tolerance of the length in the longitudinal direction (left-right direction in FIG. 4) of the design product of the machine tool seal member 30 is shown as a hatched region.
Further, the figures 13A to 13C (hatched areas) corresponding to the mounting holes 36 of the design product of the machine tool seal member 30 are drawn including the range of the dimensional tolerance. Therefore, the shape of the mounting hole 36 of the design product of the machine tool seal member 30 when viewed from the above one direction (direction of arrow IIA in FIG. 1) is circular, but the figures 13A to 13C drawn on the paper 11 are shown. , It is drawn in a shape (hereinafter, also simply referred to as an oval) consisting of two parallel lines of equal length and two semicircles including the dimensional tolerance of the mounting hole 36.

The range 14 of the dimensional tolerance and the figures 13A to 13C may be drawn so as to be easily visible to the inspector. These may be shown by solid painting with a color different from that of paper 11, for example, instead of hatching.

In the embodiment of the present invention, when the reference drawing drawn on the scale for dimensional inspection shows the range of the dimensional tolerance of the dimensional to be evaluated, the portion showing the range of the dimensional tolerance of the dimensional to be evaluated is the reference. Both the line 14a indicating the shape of the design product and the line 14b indicating the range of the dimensional tolerance may be drawn as in the portion of the dimensional tolerance range 14 in FIG. 12, or the figure of the reference FIG. Like 13A to 13C, the line indicating the shape of the design product may be omitted, and only the line 13b for indicating the range of the dimensional tolerance may be drawn.

In the dimensional inspection method described later using the dimensional inspection scale 10, the reference FIG. 12 and the machine tool seal member 30'which is the object to be inspected are superposed with the reference portion set in the dimensional inspection scale 10 as a reference. I do.
In the setting of the reference portion, the upper left corner of the outline of the machine tool seal member 30 in the reference drawing 12 is set to the reference point BP, and the upper side is set to the first reference line BL1. Further, a virtual line which is in the front surface of the paper 11 and which passes through the reference point BP and is perpendicular to the first reference line BL1 is set as the second reference line BL2.
The reference sites (reference point BP, first reference line BL1 and first reference line BL2) set in this way serve as a reference at the time of superposition in the dimensional inspection method of the present embodiment.
In the present embodiment, the reason why the upper left corner of the outline of the reference diagram 12 is set as the reference point BP is that the design drawing (not shown) of the machine tool seal member 30 which is the product to be inspected indicates this portion. This is because it is used as a reference point. By setting the reference part of the scale 10 for dimensional inspection at the same part as the reference point of the design drawing of the product to be inspected, the dimensional inspection according to the design drawing becomes possible.

The above-mentioned dimensional tolerance range 14 is set with reference to the second reference line BL2 including the reference point BP.
Further, in the figures 13A to 13C, the length of the 13B oval is longer in the longitudinal direction (left-right direction in FIG. 4) than that of the 13A oval, and the length of the 13C oval is longer than that of the 13B oval. It is drawn so that the length in the direction is long.
This is because the dimensional tolerances of the figures 13A to 13C corresponding to the mounting holes 36 are set with reference to the second reference line BL2. In the reference diagram 12 drawn on the dimensional inspection scale 10, the range of the dimensional tolerance is increased as the figure corresponds to the mounting hole 36 away from the second reference line BL2.

<Dimension inspection method>
FIG. 5 is a diagram for explaining a dimensional inspection method according to the present embodiment.
In the present embodiment, the dimensional inspection of the machine tool seal member is performed by using the dimensional inspection scale 10 and the inspection jig 70 separately prepared.
The inspection jig 70 is a member having a shape (L-shape) in which two square pillar members 71 and 72 are joined at an angle of 90 ° formed by the two square pillar members 71 and 72. The inspection jig 70 is a sufficiently hard member made of resin, metal, or the like. The inspection jig 70 is preferably transparent from the viewpoint of easy alignment.
In the inspection jig, the angle formed by the two square pillar members may be equal to or greater than the angle formed by the upper side and the left side of the reference FIG. 12 shown in FIG. 4, and may be larger than 90 °.

(1) As shown in FIG. 5, the inspection jig 70 is placed at a predetermined position on the front surface of the dimensional inspection scale 10.
Here, in the inspection jig 70, one ridge line 71a of the square pillar member 71 coincides with the first reference line BL1 set in the reference diagram 12, and the end portion of the ridge line 71a on the square pillar member 72 side is the reference. Place it so that it coincides with the reference point BP in FIG. As a result, since the angle formed by the quadrangular prism member 71 and the quadrangular prism member 72 is 90 °, one ridge line of the quadrangular prism member 72 passes through the reference point BP and is orthogonal to the first reference line BL1. Consistent with line BL2.

(2) Next, the machine tool seal member 30'which is the object to be inspected is placed on the front surface of the dimensional inspection scale 10 (see FIG. 5), and the outer edge (curvature) of the machine tool seal member 30'is placed. The upper edge of the auxiliary member 51 and the left end of the edge) are brought into contact with the inspection jig 70, and the machine tool seal member 30'is overlapped with the reference drawing 12 drawn on the dimension inspection scale 10. match.
Here, the machine tool seal member 30'is opposed to the front surface of the dimensional inspection scale 10 so that the back side (mounting surface side of the finished product to the machine tool 60) faces the machine tool seal member 30'. Place 30'.

After that, the shape of the machine tool seal member 30'viewed from the support member 41 side toward the bending auxiliary member 51 and the machine tool seal member drawn on the dimensional inspection scale 10 are visually recognized by the inspector. The shapes of the 30 designed products (reference diagram 12) are compared with each other, and the following judgments (A) and (B) are made.

(A) Whether the end portion of the machine tool seal member 30'on the side in contact with the inspection jig 70 and the side opposite to the longitudinal direction (right side in the longitudinal direction) overlaps with the dimensional tolerance range 14 of the reference drawing 12. Judge whether or not. As a result, when the entire end portion on the opposite side in the longitudinal direction overlaps the range 14 of the dimensional tolerance, it is judged that this evaluation dimension is acceptable.

(B) Whether or not only the figures 13A to 13C can be seen from each mounting hole 36'when the reference diagram 12 drawn on the dimensional inspection scale 10 is viewed through the mounting hole 36'of the machine tool seal member 30'. Judge. As a result, when only the figures 13A to 13C (only hatching) are observed through the mounting hole 36', it is judged that this evaluation dimension is acceptable. On the other hand, if the periphery of the figures 13A to 13C is also observed through the mounting hole 36', it is judged to be unacceptable.
Then, in the present embodiment, when the evaluations of (A) and (B) are both passed, it is determined that the evaluated machine tool seal member 30'has the evaluation target dimension conforming to the standard value. do.
In the dimension inspection method of the present embodiment, at least two evaluation target dimensions are evaluated at the same time.

Such a dimensional inspection method can be one step included in the above-mentioned method for manufacturing a seal member for machine tools, and according to the method for manufacturing a seal member for machine tools including the above dimensional inspection method, the dimensions to be evaluated. Can efficiently manufacture machine tool seal members that meet the standard values.

In the present embodiment, the dimensions in the longitudinal direction (left-right direction in FIG. 4) are inspected with reference to the second reference line BL2 passing through the reference point BP.
The object to be inspected for the machine tool seal member to be inspected by the above-mentioned inspection method has dimensions in the lateral direction (vertical direction in FIG. 4) and the upper side from the viewpoint of being able to perform dimensional inspection with higher accuracy. It is preferable that the seal member for a machine tool has already been inspected for the angle between the edge portion and the edge portions at both ends in the longitudinal direction and has passed the inspection.

(Second Embodiment)
In this embodiment, the shape of the seal member for machine tools, which is the product to be inspected, and the reference diagram drawn on the scale for dimensional inspection are different from those in the first embodiment.
FIG. 6 is a partial perspective view showing an example of a seal member for a machine tool, which is a product to be inspected according to the present embodiment. FIG. 7 is a plan view showing an example of a scale for dimensional inspection according to the present embodiment.

<Seal member for machine tools>
The machine tool seal member 130, which is the product to be inspected in the present embodiment, includes an elastic member 131 and a plate-shaped support member 141. The machine tool seal member 130 is different from the machine tool seal member 30 of the first embodiment in that it does not include a bending auxiliary member. The shape of both end edges in the longitudinal direction of the machine tool seal member 130 is also different from that of the machine tool seal member 30 of the first embodiment.

The elastic member 131 is the same member as the elastic member 31 in the first embodiment. The elastic member 131 is made of a rubber composition and is a flat plate-shaped member in a natural state. The elastic member 131 is a member arranged between the attachment portion of the machine tool and the support member 141 when the seal member 130 for the machine tool is attached to the machine tool. The elastic member 131 includes a fixing portion 132 facing the support member 141 and a lip portion 133 extending from the fixing portion 132 to the tip end side, and the edge portion 134 at the tip end of the lip portion 133 comes into contact with the sliding surface of the machine tool.

The support member 141 is a member for attaching the machine tool seal member 130 to the machine tool while supporting the elastic member 131. The support member 141 is a flat plate-shaped member made of a steel plate, an aluminum plate, or the like. The support member 141 sandwiches the fixing portion 132 of the elastic member 131 between the support member 141 and the mounting portion of the machine tool, and attaches the machine tool seal member 130 to the machine tool.

The elastic member 131 and the support member 141 are joined via an adhesive layer 137 provided between the elastic member 131 and the support member 141.
The machine tool seal member 130 has a plurality of mounting holes 136. The machine tool seal member 130 is attached to the machine tool by inserting a bolt into the mounting hole 136 and fixing it with a nut.

<Manufacturing method of seal members for machine tools>
The machine tool seal member 130 shall be manufactured through the same procedure as in the manufacturing step A and the manufacturing step B in the method for manufacturing the machine tool seal member of the first embodiment (however, there is no joining step of the bending auxiliary member). Can be done.
In this case as well, the machine tool seal member manufactured through the manufacturing step A and the manufacturing step B usually has a dimension to be evaluated that matches the standard value of the machine tool seal member 130, and the standard value. Some of them do not match.

Therefore, also in the manufacturing method of the present embodiment, the machine tool seal member manufactured through the manufacturing process A and the manufacturing process B is used as the object to be inspected, and the evaluation target dimension is the machine tool seal by the dimension inspection method described later. A dimensional inspection process is performed to select a machine tool seal member that meets the standard value of the member 130.

As a result, it is possible to manufacture the machine tool seal member 130 whose dimensions to be evaluated meet the standard values.

In the present embodiment, the machine tool seal member 130 is the product to be inspected.
In this embodiment, it is determined whether or not the length of the machine tool seal member as an object to be inspected in the longitudinal direction and the position and diameter of the mounting hole conform to the standard values of the machine tool seal member 130. ..

<Scale for dimensional inspection>
FIG. 7 is a plan view showing an example of a scale for dimensional inspection according to the present embodiment. In FIG. 7, the direction of the arrow X is the upward direction, and the direction of the arrow Y is the left direction.
The dimension inspection scale 110 according to the present embodiment has a reference 112 on the front surface of the paper 111 in which the machine tool sealing member 130 viewed from one direction is drawn with the product dimensions. Reference numeral 112 is a view when the machine tool seal member 130 is viewed in the direction from the support member 141 side toward the elastic member 131. In the reference diagram 112, the seal member for a machine tool, which is the product to be inspected, is drawn with the product dimensions. The scale of the reference diagram 112 is 1: 1.

Reference FIG. 112 shows a range of dimensional tolerances of the dimensions to be evaluated in the machine tool seal member 130.
Here, the range 114 of the dimensional tolerance of the length in the longitudinal direction (left-right direction in FIG. 7) of the design product of the machine tool seal member 130 is shown as a hatched region.
Further, the figures 113A and 113B (hatched areas) corresponding to the mounting holes 136 of the design product of the machine tool seal member 130 are drawn including the range of the dimensional tolerance. Therefore, the shape of the mounting hole 136 of the design product of the machine tool seal member 130 when viewed from the above one direction is circular, but the figures 113A and 113B are drawn in an oval shape including the dimensional tolerance.

The range 114 of the dimensional tolerances and the figures 113A and 113B may be shown, for example, by solid painting with a color different from that of the paper 111, instead of hatching.

In the dimension inspection method using the dimension inspection scale 110, the reference drawing 112 and the object to be inspected of the machine tool seal member are superposed with the reference portion set in the dimension inspection scale 110 as a reference.
In the setting of the reference portion, the upper left corner of the outline of the machine tool seal member 130 in the reference drawing 112 is set to the reference point BP, and the upper side is set to the first reference line BL1. Further, a line that is in the front surface of the paper 111, passes through the reference point BP, and is perpendicular to the first reference line BL1 is set as the second reference line BL2. In the present embodiment, the left side of the reference diagram 112 coincides with the second reference line BL2.
The reference portions (reference point BP, first reference line BL1 and first reference line BL2) set in this way serve as a reference at the time of superposition in the dimensional inspection method described later.
In the present embodiment, the reason why the upper left corner of the outline of the reference diagram 112 is set as the reference point BP is that this portion is set in the design drawing (not shown) of the machine tool seal member 130 which is the inspection target product. Is the reference point. This enables dimensional inspection according to the design drawing.

The above-mentioned dimensional tolerance range 114 is set with reference to the second reference line BL2 including the reference point BP.
The figures 113A and 113B are drawn so that the oval shape of 113B has a longer length in the longitudinal direction than the oval shape of 113A. This is because the dimensional tolerances included in the figures 113A and 113B are set with reference to the second reference line BL2.

<Dimension inspection method>
Also in this embodiment, as in the first embodiment, the dimensional inspection is performed using the dimensional inspection scale 110 and the L-shaped inspection jig. In the inspection jig, the angle formed by the two quadrangular prism members may be larger than the angle formed by the upper side and the left side of the reference diagram 112 shown in FIG.
First, the inspection jig is placed at a predetermined position on the front surface of the dimension inspection scale 110 with reference to the first reference line BL1 and the reference point BP.

Next, the object to be inspected of the machine tool seal member is placed on the front surface of the scale 110 for dimensional inspection, and the upper edge portion and the left side edge portion of the inspected object of the machine tool seal member are placed. Is brought into contact with the inspection jig, and the object to be inspected of the machine tool seal member is superimposed on the reference drawing 112 drawn on the dimension inspection scale 110.
Here, for the machine tool, the back side of the object to be inspected (the side of the finished product to be attached to the machine tool) of the seal member for the machine tool faces the front surface of the scale 110 for dimensional inspection. Place the object to be inspected for the seal member.

After that, the shape of the object to be inspected of the seal member for machine tools viewed in the direction from the support member 141 side toward the elastic member 131 and the shape drawn on the dimensional inspection scale 110 for the machine tool by the visual inspection of the inspector. Comparing with the shape of the design product of the seal member 130 (reference drawing 112), the evaluation target dimension of the inspected object of the machine tool seal member is the standard of the machine tool seal member 130 in the same manner as in the first embodiment. Determine if it matches the value.
Also in the dimension inspection method of this embodiment, at least two evaluation target dimensions are evaluated at the same time.

In the present embodiment, the dimensions in the longitudinal direction (left-right direction in FIG. 7) are inspected with reference to the second reference line BL2 passing through the reference point BP.
The object to be inspected for the machine tool seal member inspected in the present embodiment has the dimensions in the lateral direction (vertical direction in FIG. 7) and the upper edge from the viewpoint that the dimensional inspection can be performed more accurately. It is preferable that the machine tool seal member has already been inspected for the angle between the portion and the edges at both ends in the longitudinal direction (both are at right angles) and has passed the inspection.

(Other embodiments)
In the above-described embodiment, only one reference drawing of the product to be inspected viewed from one direction is described on one dimensional inspection scale, but in the embodiment of the present invention, one dimensional inspection scale is used. A plurality of reference diagrams may be drawn.
For example, when a machine tool seal member is attached to one machine tool, a combination of a plurality of machine tool seal members may be attached to one machine tool. In this case, all the reference drawings of the plurality of machine tool seal members attached to one machine tool may be drawn on one dimensional inspection scale.
Further, when a plurality of reference drawings are drawn on one dimensional inspection scale, all the reference drawings may be views from the same direction, or different directions on one dimensional inspection scale. Reference diagrams viewed from above may be mixed.

In the dimensional inspection scale of the above-described embodiment, the reference drawing of the product to be inspected is drawn on paper, but in the dimensional inspection scale according to the embodiment of the present invention, the member on which the reference drawing is drawn is paper. The present invention is not limited to, and may be, for example, a sheet-like or plate-like member such as a resin sheet, a resin plate, or a wooden or metal plate. Among these, paper is preferable because it is inexpensive and suitable for mass production.

In the dimensional inspection scale of the above-described embodiment, the reference portion for superimposing the reference drawing of the product to be inspected and the object to be inspected is set to include the same position as the reference point in the design drawing of the product to be inspected. However, the reference portion does not necessarily have to be set to include the same position as the reference point in the design drawing, and may be appropriately set according to the product to be measured.

In the above-described embodiment, the dimension inspection in the longitudinal direction (Y direction in FIGS. 4 and 7) of the machine tool seal member is performed, but in the embodiment of the present invention, the short side of the machine tool seal member is also performed. Dimensional inspection in the direction (X direction in FIGS. 4 and 7) may be performed. Further, the dimensional inspection in the lateral direction of the seal member for a machine tool may be performed in a separate step by using the dimensional inspection method according to the embodiment of the present invention.
In this case, in the reference drawing in which the machine tool seal member viewed from one direction is drawn with the product dimensions, the range of the dimensional tolerance of the length in the lateral direction of the machine tool seal member is shown by hatching or the like. May be good.

The machine tool seal member to be inspected in the embodiment of the present invention is not limited to the machine tool seal member having the above-described configuration, and is known as a lip seal, slide seal, telesco seal, cover seal, or the like. Mechanical seal members can be inspected.
As a specific example of the seal member for a machine tool, for example, the seal member for a machine tool exemplified in the above-mentioned Patent Documents 1 to 6 can be exemplified.
The product to be inspected may be a product other than the machine tool seal member.

10, 110 Dimensional inspection scale 11, 111 Paper 12, 112 Reference drawing 13A, 13B, 13C Figures corresponding to the mounting holes 36 14,114 Dimensional tolerances 30, 130 Machine tool seal member 30'Machine tool seal member cover Inspection object 31, 131 Elastic member 32, 132 Fixed part 33, 133 Lip part 34, 134 Edge part 36, 136 Mounting holes 37, 38, 137 Adhesive layer 41, 141 Support member 42 Support part 43 Protective part 51 Curved auxiliary member 52 Flat plate 53 Auxiliary part 60 Machine tool 65 Mounting part 66 Bolt 67 Nut BL1 1st reference line BL2 2nd reference line BP reference point

Claims (7)

A dimensional inspection scale with a reference drawing of the product to be inspected from one direction drawn with the product dimensions,
Prepare an object to be inspected for which it is judged whether or not the dimensions to be evaluated conform to the standard values of the product to be inspected.
The object to be inspected is superimposed on the reference drawing drawn on the scale for dimensional inspection, and the shape of the object to be inspected viewed from one direction is compared with the reference drawing to compare the object to be inspected. A dimensional inspection method for determining whether or not the dimensional evaluation target conforms to the standard value of the product to be inspected. The reference drawing shows the range of dimensional tolerances of the dimensions to be evaluated in the product to be inspected.
The dimension according to claim 1, wherein it is determined whether or not the dimension to be evaluated of the object to be inspected is within the range of the dimensional tolerance, and if it is within the range, it is determined that the dimension to be evaluated conforms to the standard value of the product to be inspected. Inspection methods. The dimensional inspection method according to claim 1 or 2, wherein at least two evaluation target dimensions in the inspection target product are evaluated at the same time. The product to be inspected is a machine tool seal member provided with a flat surface constituting a mounting surface to the machine tool and a hole for mounting the machine tool.
The scale for dimensional inspection is a reference of the seal member for a machine tool as viewed in the direction normal to the plane constituting the mounting surface to the machine tool and from the side opposite to the plane toward the plane side. The dimensional inspection method according to any one of claims 1 to 3, having a figure. It is a scale for dimensional inspection to judge whether the dimensional to be evaluated of the object to be inspected conforms to the standard value of the product to be inspected.
The product to be inspected when viewed from one direction has a reference diagram drawn with product dimensions.
The reference drawing shows a range of dimensional tolerances of the dimensions to be evaluated in the product to be inspected, which is a scale for dimensional inspection. The product to be inspected is a machine tool seal member provided with a flat surface constituting a mounting surface to the machine tool and a hole for mounting the machine tool.
5. The fifth aspect of the present invention has a reference drawing of the sealing member for a machine tool, which is a normal direction of a plane constituting the mounting surface to the machine tool and is viewed from a side opposite to the plane toward the plane side. Scale for dimensional inspection described in. A method for manufacturing a machine tool seal member having a flat surface constituting a mounting surface to a machine tool and a hole for mounting to the machine tool.
A method for manufacturing a machine tool seal member, which comprises a step of selecting a machine tool seal member whose dimensions to be evaluated match a standard value by the dimension inspection method according to claim 4.

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