CN103615957A - Measuring tool for measuring size of D-shaped head - Google Patents

Abstract

The invention discloses a measuring tool for measuring the size of a D-shaped head. The measuring tool comprises a bottom plate (1), a dial indicator (2) and a positioning block A (3), and is characterized in that the dial indictor (2) is arranged on the positioning block (3); the positioning block (3) is positioned on the bottom plate (1) through a bolt C (14) and a small washer (16); a bolt A (4) is arranged on the bottom plate (1); a lower V-shaped block (5) is positioned by a positioning pin (12) and a bolt B (13); an upper V-shaped sliding block (6) is arranged on the lower V-shaped block (5) to be matched with the lower V-shaped block (5); a reference block (7) is arranged on the right side of the upper V-shaped sliding block (6); a clamping V-shaped block (8) is connected with the left end of a straight pin (11); a positioning block B (10) is connected with the right end of the straight pin (11); the straight pin (11) penetrates through a spring (9) which is sandwiched between the clamping V-shaped block (8) and the positioning block B (10); a spring B (15) is arranged between the positioning block A (13) and the upper V-shaped sliding block (6). The measuring tool improves the efficiency of measurement and detection, is wide in applicability, simple in structure, convenient and rapid to operate and low in cost.

Description

Measuring tool for measuring D-head size

technical field

The invention belongs to the field of measuring tools, in particular to a measuring tool for measuring the size of a D-shaped head.

Background technique

At present, measuring tools for measuring the size of D-shaped heads are widely used. In the prior art, methods for measuring the size of D-shaped head parts include caliper measurement, projection measurement, gauge measurement, and three-coordinate measurement. But these methods all have deficiencies, the caliper measurement method: the left hand pinches the part horizontally, the tail of the caliper touches the side of the head horizontally, and the central rod of the caliper is extended to the highest point of the polished rod of the part. It is difficult to pinch the part to keep it level, and the measuring head of the center rod of the caliper is so small that it cannot measure the highest point of the contour every time. Different personnel measure the same size with a difference of 0.03mm~0.05mm, which often makes workers and inspectors Controversy on this issue has affected production efficiency; projection measurement method: projectors and universal tool microscopes can be used, regardless of projectors or universal tool microscopes, the instruments are placed in a separate room, in order to ensure the temperature and humidity of the room , it must be separated from the large processing workshop, so it is not suitable for on-site use, the measurement is inconvenient, the measurement time is long, and there will be errors in zooming during measurement; gauge measurement method: design a gauge with the same model as the part, and the part can be placed It is considered qualified if it is put in, and it is not qualified if it is not put in, but the value of the symmetry of the part cannot be measured, and the tolerance of the polished rod of the part is large, which will affect the measurement accuracy of the gauge; three-coordinate measurement method: three-coordinate measuring instrument is a huge and Large companies generally have one or two precision instruments, and they must be operated after professional training and corresponding operating qualification certificates. It is inconvenient for on-site measurement and testing, and cannot be tested in large quantities. At the same time, the cost is high and the efficiency is low. These methods all lead to low production efficiency and relatively high cost, which are very unfavorable for mass production and testing.

Contents of the invention

The object of the present invention is to overcome the above disadvantages and provide a measuring tool for measuring the size of D-shaped head with high efficiency, wide adaptability, simple structure, convenient operation and low cost.

Purpose of the present invention and its main technical problem of solving are to adopt following technical scheme to realize:

The invention discloses a measuring tool for measuring the size of a D-shaped head, which comprises a bottom plate, a dial indicator, and a positioning block A, wherein: the dial indicator is installed on the positioning block, and the positioning block A is positioned on the bottom plate by a bolt C and a small washer Bolt A is installed on the bottom plate; the lower V-shaped block is positioned by positioning pins and bolts B; the upper V-shaped slider is installed on the lower V-shaped block to cooperate with it; the reference block is installed on the upper V-shaped slider Right side; the left end of the cylindrical pin is connected with a clamping V-shaped block, the right end is connected with a positioning block B, and the spring is penetrated by the cylindrical pin and clamped between the clamping V-shaped block and the positioning block B.

The above-mentioned measuring tool for measuring the size of a D-shaped head, wherein: the bolts A, B, and C are all hexagonal socket bolts.

In the measuring tool for measuring the size of the D-shaped head, a spring B is installed between the positioning block A and the upper V-shaped slider.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. As can be seen from the above technical scheme, the left step groove of the bottom plate uses bolts C and washers to fix the positioning block in the step groove of the bottom plate, and the positioning block can move left and right in the step groove to adjust different measurement lengths; Insert the spring to eliminate the gap between the parts and the upper V-shaped block; while the upper V-shaped block is directly placed on the lower V-shaped block without any locking device, relying on the weight of the upper V-shaped block to make it close to the lower On the top of the V-shaped block; when measuring, under the relative force of the spring and the dial indicator and the part, it cannot be tilted upward, so that the measurement of the part will be more accurate. After the measurement is completed, the part is removed, and the upper V-shaped block is placed between the dial indicator and the part. Return to the original position under spring thrust. The head of the reference block is close to the side of the upper V-shaped block, and the rod is close to the V-shaped groove on the side of the lower V-shaped block. When the reference block clamps the leftward clamping force of the V-shaped block, it will hold the part tightly Clamped in the V-groove, the datum of the part can be adjusted.

In a word, the measurement of symmetry, length and D-shaped head size of different parts can be carried out by using the present invention, which is more accurate and faster than the measurement with universal tool microscope, caliper, gauge and three-coordinate caliper in the past, and it does not need to be placed in a special room, and can be On-site use in a workshop, operators do not need professional long-term training, easy to implement, stable, wide adaptability, simple structure, and low cost.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the right view of Fig. 1;

Fig. 4 is the sectional view of bottom plate of the present invention;

Fig. 5 is the plan view of bottom plate of the present invention;

Fig. 6 is a sectional view of the positioning block A of the present invention;

Fig. 7 is the left side view of positioning block A of the present invention;

Fig. 8 is the front view of the lower V-shaped block of the present invention;

Fig. 9 is a top view of the lower V-shaped block of the present invention;

Fig. 10 is the right view of the lower V-shaped block of the present invention;

Fig. 11 is the front view of the upper V-shaped slider of the present invention;

Fig. 12 is the right side view of the upper V-shaped slider of the present invention;

Fig. 13 is the front view of the reference block of the present invention;

Fig. 14 is a top view of the reference block of the present invention.

Marks in the figure: 1. Bottom plate; 2. Dial indicator; 3. Positioning block A; 4. Bolt A; 5. Lower V-shaped block; 6. Upper V-shaped slider; 7. Reference block; 8. Clamping V Type block; 9, spring A; 10, positioning block B; 11, straight pin; 12, positioning pin; 13, bolt B; 14, bolt C; 15, spring B; 16, small washer.

Detailed ways

Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the measuring tool for measuring the size of the D-shaped head according to the present invention will be described in detail as follows.

Referring to Figures 1 to 14, the present invention discloses a measuring tool for measuring the size of a D-shaped head, including a base plate 1, a dial indicator 2, and a positioning block A3, wherein: the dial indicator 2 is installed on the positioning block 3, and the positioning Block A3 is positioned on the bottom plate 1 by bolt M8 inner hexagonal C14 and small washer 16, and M5 inner hexagonal bolt A4 is installed on the bottom plate 1; the lower V-shaped block 5 is positioned by positioning pin 12 and M5 inner hexagonal bolt B13; The upper V-shaped slider 6 is installed on the lower V-shaped block 5 to cooperate with it; the reference block 7 is installed on the right side of the upper V-shaped slider 6; the left end of the cylindrical pin 11 is connected with the clamping V-shaped block 8, and the right end is connected with the positioning block B10 , the spring 9 is penetrated by the cylindrical pin 11 and clamped between the clamping V-shaped block 8 and the positioning block B10. A spring B15 is installed between the positioning block A3 and the upper V-shaped sliding block 6 . The bolts A4, B13 and C14 are all hexagon socket bolts.

During use, the supporting surface of reference block 7 is close to the V-shaped groove on the lower V-shaped block 5 horizontal planes, the bar of reference block 7 is close to the V-shaped groove on the lower V-shaped block 5 sides, and the head of reference block 7 Close to the side of the upper V-shaped block 6, push the clamping V-shaped block 8 to the right by hand until there is a space in the middle where a polished part rod can be placed, and then put the polished rod of the part into the V-shaped groove vertically. Unclamp the V-shaped block 8, under the thrust of the spring A9, it will tightly clamp the polished rod in the V-shaped groove, and the head of the reference block 7 will push the upper V-shaped slide block 6, and then use the dial gauge to The meter head of 2 is close to the opposite side of upper V-shaped block 6, then the pointer in the dial is adjusted to zero position. The supporting surface is close to the V-groove on the level of the lower V-shaped block 5, and the D-shaped head is swung so that its milling surface is close to the side of the upper V-shaped slider 6 to ensure that there is no gap between them, and the head will push The upper V-shaped slider 6 moves to the left, thereby pushing the pointer of the dial gauge 2 to rotate. The upper difference of the measurement datum was previously adjusted to zero. In the measurement of the part, if the pointer is on the zero line, it means that the part has not been processed to the size required by the drawing. You can Re-clamp and process again. If the needle is on the zero line and within the tolerance range of the drawing, it proves that the part is qualified, and if it exceeds the range, it is unqualified. If it is to measure the symmetry of the part, there is no need to adjust the measurement reference. According to the method of measuring the D-shaped head, measure the two sides separately, and the swing difference of the hands is the symmetry value. The measuring method of polished rod length is basically consistent with the measuring method of D type head, just polished rod is placed in the V-groove on lower V-shaped block 5 horizontal planes, and all the other operating methods are the same. In a word, the present invention improves the efficiency of measurement and detection, has wide adaptability, simple structure, convenient operation and low cost.

The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, Equivalent changes and modifications still fall within the scope of the technical solution of the present invention.

Claims (3)

1. A measuring tool for measuring the size of a D-shaped head, comprising a base plate (1), a dial indicator (2), and a positioning block A (3), characterized in that: the dial indicator (2) is installed on the positioning block (3 ), the positioning block A (3) is positioned on the bottom plate (1) by the bolt C (14) and the small washer (16), and the bolt A (4) is installed on the bottom plate (1); the lower V-shaped block (5 ) is positioned by the positioning pin (12) and the bolt B (13); the upper V-shaped slider (6) is installed on the lower V-shaped block (5) to cooperate with it; the reference block (7) is installed on the upper V-shaped slider The right side of the block (6); the left end of the cylindrical pin (11) is connected with the clamping V-shaped block (8), the right end is connected with the positioning block B (10), the spring (9) is penetrated by the cylindrical pin (11) and clamped in the clamping V Type block (8) and positioning block B (10). 2. The measuring tool for measuring the size of a D-shaped head according to claim 1, characterized in that: the bolts A (4), B (13) and C (14) are all hexagon socket bolts. 3. The measuring tool for measuring the size of a D-shaped head according to claim 1, characterized in that: a spring B (15) is installed between the positioning block A (3) and the upper V-shaped slider (6).

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