CN200975877Y - Contour dimension detecting device - Google Patents

Abstract

The utility model discloses a measuring jig for external dimensions, which is provided with a base, on which a flattening boss for supporting the tested product to be placed stably is fixed. One side is fixed with a width positioning boss that can abut against the widest point of the outermost shape of the product under test, while the opposite side is fixed with a probe that can abut against the largest point of the outermost shape of the product under test. The first measuring instrument; the base is fixed with a length positioning boss on one side of the width of the leveling boss that can withstand the maximum length of the product to be tested, and the opposite side is fixed with its measuring The head can abut against the second measuring instrument at the longest point of the outermost shape of the measured product; in addition, the flattening bosses are formed on the sides opposite to the measuring heads of the first measuring instrument and the second measuring instrument respectively There are convex surfaces for zeroing the two gauges. The detection fixture has the advantages of simple structure, fast detection speed, high efficiency and low human error rate.

Description

A measuring fixture for external dimensions

technical field

The utility model relates to a detection jig for detecting the longest and widest dimensions of the shape of an irregular product.

Background technique

As we all know, in the process of product quality control, it is necessary to test the performance of the product for quality control. Among them, it is most difficult to detect the longest and widest dimensions of the shape of irregular products. Taking mobile phone casing products as an example, the most important dimensions that need to be detected are the maximum length and width of the casing. In the past, this kind of inspection was a hand-held product, and the maximum length and width were measured with a caliper. Its disadvantages are as follows:

1. Hand-held products have extremely poor stability and cannot guarantee the accuracy of the measured values at all;

2. It cannot be guaranteed that the measured length and width are the maximum length and width of the product, and the authenticity of the measured value is poor;

3. The human factor is relatively large in the whole measurement process, and the difference of the measurement results is relatively large.

Utility model content

In view of the above content, the purpose of this utility model is to provide an external dimension detection jig with fast detection speed, high efficiency and low human error rate.

The purpose of this utility model is achieved through the following technical solutions:

The utility model provides a fixture for measuring external dimensions, which is provided with a base. One side of the long direction is fixed with a width positioning boss that can withstand the maximum width of the product under test, and the opposite side is fixed with a probe that can withstand the maximum width of the product under test. The first measuring instrument at the point; the base is fixed with a length positioning boss at the widthwise side of the flattening boss that can abut against the longest point of the product to be measured, while the opposite side is fixed There is a second measuring instrument whose measuring head can bear against the longest point of the outermost shape of the measured product; in addition, the flattening boss is on the side opposite to the measuring heads of the first measuring instrument and the second measuring instrument respectively Convex surfaces for zero adjustment of the two measuring instruments are correspondingly formed.

On the basis of the above structure, among them:

The first measuring instrument and the second measuring instrument are two improved dial gauges, the probes of which are all fixed on the test end of the mandrel of the existing dial gauge, and the top surfaces of the probes are all vertical on the horizontal plane. Wherein, the gauge head of the dial indicator is provided with a clamping sleeve, a clamping strip and a bolt, wherein one end of the clamping sleeve is formed with two mutually perpendicular groove bottom surfaces with a certain distance from each other, and the clamping strip can be clamped longitudinally. The U-shaped groove is fixed on the bottom surface of the groove, and the clamp bar is formed with a perforation, and one end of the bolt passes through the perforation on the clamp bar and the clamping sleeve and is fixed together with the end of the mandrel in the dial gauge. The cap at the other end of the bolt is locked outside the perforation on the clamping strip.

The shells of the first measuring instrument and the second measuring instrument are fixed on the base through the cooperation of U-shaped spring clips and screws.

Compared with the prior art, the utility model can use drawing software such as Pro/E and AutoCAD to make a flattening boss for product design, which is convenient for the stable placement of the product, so that the product remains stable during measurement. , to reduce the error; in addition, using the powerful function of Pro/E software can also accurately find the maximum point of product size, so as to facilitate the setting of the length positioning boss and width positioning boss size and the fixing around the leveling boss position, thereby greatly improving the authenticity of the measured value; moreover, this jig is equipped with a dial gauge in the length and width directions of the product, and the probe of the dial gauge has been improved by design so that it can stand At the maximum point of the product size, thus ensuring the accuracy of the measurement. Therefore, compared with the existing measurement methods, the utility model can quickly, conveniently and accurately locate the product to be tested, and detect the maximum length and width of the product at one time, and the operation is simple and easy to understand, especially very suitable for on-site SPC section detection, so that defective products can be found early and unnecessary economic losses can be reduced.

Description of drawings

For ease of description, the utility model is described in detail by the following preferred embodiments and accompanying drawings.

Fig. 1 is a three-dimensional exploded structure schematic diagram of a fixture for measuring external dimensions of the present invention.

Fig. 2 is a three-dimensional structure schematic diagram of an external dimension detection fixture of the present invention when testing a mobile phone casing.

Fig. 3 is a perspective view of the three-dimensional structure of an improved dial indicator in a fixture for measuring external dimensions of the present invention.

Detailed ways

Please refer to Fig. 1 to Fig. 3 together. The utility model is a kind of external dimension detection jig, which is provided with a base 1, and a flattening boss 2 is fixed on the base 1 to support the tested product so that it can be placed stably. The base 1 is fixed with a width positioning boss 3 on the long side of the leveling boss 2, which can withstand the maximum width of the product to be tested, and the opposite side is fixed with its measuring head 41. Butt against the first measuring instrument 4 at the widest point of the outermost shape of the tested product; the base 1 is fixed on the widthwise side of the leveling boss 2, which can be pushed against the longest point of the outermost shape of the tested product The length positioning boss 5 at the place, and the opposite side is fixed with the second measuring instrument 6 whose measuring head 61 can abut against the maximum length point of the outermost shape of the product under test; in addition, the flattening boss 2 Convex surfaces 21 , 22 for zero adjustment of the first measuring instrument 4 and the second measuring instrument 6 are respectively formed on the sides facing the respective measuring heads 41 , 61 of the first measuring instrument 4 and the second measuring instrument 6 . The first measuring instrument 4 and the second measuring instrument 6 are all fixed on the base 1 by a U-shaped spring clip 7 and a screw 8, so that the first measuring instrument 4 and the second measuring instrument 6 The probes 41, 61 can pass through the U-shaped spring clip 7 and abut against the maximum point of the length or width of the outermost shape of the product to be tested.

The above-mentioned first measuring instrument 4 and the second measuring instrument 6 are two improved dial gauges (or dial gauges): its probes 41, 61 are all fixed to the test of the mandrel 9 of the existing dial gauge. end, and the top surfaces of the probes 41, 61 are planes perpendicular to the horizontal plane; They are perpendicular to each other, the bottom surfaces of the grooves are spaced at a certain distance from each other, and the U-shaped grooves 113, 115 that enable the clip 12 to be locked longitudinally on the bottom surface of the groove, the clip 12 is formed with a perforation 123, and one end of the bolt 13 is Pass through the perforation 123 on the clip bar 12 and fix it with the clip sleeve 11 and then the end of the mandrel 9 in the dial indicator, and the other end cap of the bolt 13 is locked on the perforation 123 on the clip bar 12 outside.

When the utility model detects in detail, the first measuring instrument 4 and the second measuring instrument 6 are returned to zero by using the convex surface 21 on the side of the flat boss 2, and then the first measuring instrument 4 (or the second measuring instrument 6) is pulled. The bar 12 at the head of the meter makes it longitudinally locked in the U-shaped groove 115 away from the measuring head 41 (or measuring head 61), that is, the pulling of the bar 12 can drive the mandrel 9 and the measuring head through the bolt 13 at the same time. The head 41 (or measuring head 61) is away from the convex surface 21, and then the product to be tested is clamped such as the mobile phone casing 10, and then the clip 12 at the meter head of the first measuring instrument 4 (or the second measuring instrument 6) is pulled to make it Longitudinally located in the U-shaped groove 113 closer to the measuring head 41 (or measuring head 61), that is, at the same time, the clip bar 12 can drive the mandrel 9 and the measuring head 41 (or measuring head 61) close to the convex surface 21 through the bolt 13, and then In contact with the mobile phone case 10, because the distance between the convex surface 21 and the width positioning boss 3, and the distance between the convex surface 21 and the length positioning boss 5 are all fixed values, therefore, the size of the standard part can be referred to at last, and according to The readings on the first measuring instrument 4 and the second measuring instrument 6 judge whether the longest and widest dimensions of the outer shape of the mobile phone shell of the tested product are within the tolerance range, and then detect whether it is qualified.

Claims (4)

1. An external dimension detection jig is provided with a base, which is characterized in that: a flattening boss for supporting the tested product to be placed stably is fixed on the base, and the base is at the length of the flattening boss. One side is fixed with a width positioning boss that can abut against the widest point of the outermost shape of the product under test, while the other side is fixed with a probe that can be abutted against the widest point of the outermost shape of the product under test. The first measuring instrument; the base is fixed with a length positioning boss on the widthwise side of the leveling boss, which can abut against the maximum length point of the outermost shape of the product under test, while the opposite side is fixed with its The measuring head can bear against the second measuring instrument at the longest point of the outermost shape of the measured product; in addition, the flattening bosses are corresponding to the sides of the measuring heads of the first measuring instrument and the second measuring instrument respectively. A convex surface is formed for zeroing the two gauges. 2. A fixture for measuring external dimensions as claimed in claim 1, characterized in that: the first measuring instrument and the second measuring instrument are two improved dial gauges, and the probes are all fixed on the The test end of the mandrel of the existing dial gauge, and the top surface of the measuring head are all planes perpendicular to the horizontal plane. 3. A fixture for measuring external dimensions as claimed in claim 2, characterized in that: the gauge head of the dial indicator is provided with clamping sleeves, clamping strips and bolts, wherein one end of the clamping sleeve is formed with two two U-shaped grooves perpendicular to each other, the bottom surfaces of the grooves are spaced a certain distance from each other, and the clamping strip can be locked longitudinally on the bottom surface of the groove, the clamping strip is formed with a perforation, and one end of the bolt passes through the perforating hole on the clamping strip And the fastening sleeve is fixed together with the end of the mandrel in the dial indicator, and the other end cap of the bolt is locked outside the perforation on the clamping strip. 4. A fixture for detecting external dimensions as claimed in claim 1, characterized in that: said first measuring instrument and said second measuring instrument are fixed on the said first measuring instrument and the second measuring instrument through U-shaped spring clips and screws. on the base.

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