CN115371525A - Measuring gauge and rapid measuring method in production process of large-diameter inner taper hole product - Google Patents

Abstract

The invention provides a measuring gauge in the production process of a large-diameter inner taper hole product, which comprises a supporting structure, a positioning structure and a gauge stand adjusting structure. The method comprises the following steps: s1, before measurement, a standard ring gauge is used for calibrating and zeroing the gauge: s11, placing the gauge into a standard ring gauge, adjusting the proper distance between the positioning adjusting rod and the gauge stand adjusting rod according to the size of the inner hole of the standard ring gauge, and screwing a fixing bolt; s12, clamping an inner hole of the ring gauge by using a positioning bolt, swinging the cross beam, and adjusting the positions of the two dial gauges at the maximum diameter to be zero points; s2, when a measured product is measured, the calibrated gauge is placed in an inner conical hole of the measured product to be measured, the inner conical hole is clamped by the positioning bolt, the cross beam is swung, the two dial gauges are adjusted to be in the maximum diameter position, and data of the two dial gauges are observed and recorded. The invention can reduce labor intensity and improve production efficiency.

Description

Measuring gauge and rapid measuring method in the production process of large-diameter inner tapered hole products

technical field

The invention relates to the technical field of taper measurement, in particular to a measuring gauge and a rapid measuring method in the production process of large-diameter inner tapered hole products.

Background technique

The driven gear of the locomotive, the wheel and the axle are usually connected by a tapered hole interference fit, which has high dimensional accuracy. When measuring the size of the tapered hole structure, the conventional method is to use a plug gauge to detect it. Compare the size of the qualified plug gauge with the size of the taper hole required by the drawing, and convert it into an H value. When testing, put the plug gauge into the taper hole and measure its H value as a standard for testing the size of the taper hole. Due to structural limitations, a plug gauge can only detect one product, and even cannot be used for products that exceed 1mm of the taper hole to be tested, so the measuring tool can only be redesigned. Self weight also correspondingly increases, and operation is extremely inconvenient.

At present, plug gauges are commonly used to detect taper holes. There are two specific methods: 1. Compare the measured plug gauge size with the taper hole size, convert it into H value, and use it as the test standard for the taper hole size. When testing the size of the taper hole, put the plug gauge into the taper hole, measure the H value to judge whether the taper hole is qualified or not; Turn it and take it out, visually inspect the traces of vermilion oil in the taper hole, and judge whether the contact area required by the standard is met. But there are the following disadvantages:

(1) It is unique. A plug gauge can only detect a product with a tapered hole specification, and even a product that exceeds the tested tapered hole by 1mm cannot be used, and the production gauge can only be redesigned.

(2) The operability is poor. For the plug gauge with a large tapered hole size, the weight of the measuring tool itself is also relatively large, even up to tens of kilograms, which is extremely inconvenient to operate. Figure 1 shows a simple diagram of traditional plug gauge measurement, that is, it is necessary to manually place the plug gauge into the inner hole of the product under test. Then measure the A value and convert it to see if the diameter of the large end of the inner hole meets the design requirements. However, the strength of each person's plug gauge is different, which will cause the measured A value to be different. This is an inevitable defect of traditional plug gauges.

(3) The measurement accuracy is low. The angle of the taper hole cannot be directly detected when the traditional plug gauge is tested. It is necessary to manually judge the contact surface between the plug gauge and the taper hole in the product under test to draw an indirect conclusion. That is, use a special red paint to smear the surface of the plug gauge, then put the plug gauge into the inner cone hole of the product under test, and then take it out and visually measure the proportion of the cone hole in the product under test that is stained with red paint (when it reaches more than 85%, it is considered is qualified). However, this method requires very professional personnel to operate, because the thickness of smearing red, the strength of inserting the plug gauge, and the ratio of visual contact area are all uncontrollable human factors that affect the final result. There is a huge error.

Contents of the invention

According to the uniqueness of the existing technology proposed above, a plug gauge can only detect a product with a tapered hole specification, and even a product that exceeds the tapered hole 1mm to be tested cannot be used, and the production gauge can only be redesigned; Operability Poor, for plug gauges with large taper hole size, the weight of the measuring tool itself is also large or even up to tens of kilograms, which is extremely inconvenient to operate; the measurement accuracy is low, and the traditional plug gauge cannot directly detect the taper hole angle when testing. The technical problem of artificially judging the contact surface between the plug gauge and the inner tapered hole of the product under test is to draw conclusions indirectly, and a measuring gauge and a rapid measurement method in the production process of the large-diameter inner tapered hole product are provided. The invention mainly adopts a simple and easy measuring method and device. The measuring body is a dial indicator, which can be inlaid or clamped on a special watch frame. Compared with the traditional plug gauge, the H value measurement and observation accuracy is higher, and When the diameter of the inner hole is relatively large, the advantage of the gauge is better than that of the heavy plug gauge, and the measurement is particularly convenient and easy.

The technical means adopted in the present invention are as follows:

A measuring gage during the production process of large-diameter inner tapered hole products, including: a supporting structure, a positioning structure and a table seat adjustment structure, the upper part of the positioning structure is installed on one side of the supporting structure, and the lower part is in contact with the inner hole of the workpiece to be measured during measurement. The upper part of the adjustment structure of the table seat is installed on the other side of the support structure, and the lower part is installed with two dial gauges, and the two dial gauges are in contact with the inner wall of the other side of the inner hole of the workpiece to be measured during measurement. .

Further, the support structure adopts beams.

Further, the positioning structure includes a first base and a positioning adjustment rod, the first base is installed on the beam and can move on the beam, the first base is in contact with the end surface on one side of the inner hole during measurement; the positioning The adjusting rod is connected to the lower end of the first base, the lower part of the positioning adjusting rod is connected with a positioning bolt, and the positioning bolt is in contact with the inner wall of one side of the inner hole of the workpiece to be measured during measurement.

Further, the front end of the positioning bolt is a round head, and the round head is in point contact with the inner wall of the inner hole.

Further, the table base adjustment structure includes a second base and a table base adjustment rod, the second base is installed on the beam and can move on the beam, and the second base is connected to the other side of the inner hole during measurement. The end faces are in contact; the table seat adjustment rod is connected to the lower end of the second base, and the two dial gauges are installed on the table seat adjustment rod at intervals up and down.

Further, the first base is connected to the beam through fixing bolts, and the bottom surface of the first base in contact with the beam is smooth and flat.

Further, the second base is connected to the beam through fixing bolts, and the bottom surface of the second base in contact with the beam is smooth and flat.

The present invention also provides a quick measuring method, using the measuring gauge in the production process of the above-mentioned large-diameter inner tapered hole product, including the following steps:

S1. Before the measurement, check and zero the meter gauge through the standard ring gauge:

S11. Put the watch gauge into the standard ring gauge, adjust the proper distance between the positioning adjustment rod and the watch seat adjustment rod according to the inner hole size of the standard ring gauge, and tighten the fixing bolts;

S12. Clamp the inner hole of the standard ring gauge with the positioning bolt, swing the crossbeam, and adjust the two dial gauges to zero at the position of the maximum diameter;

S2. When measuring the tested product, put the calibrated gauge into the inner taper hole of the tested product for measurement, clamp the inner taper hole with the positioning bolt, swing the beam, adjust the two dial gauges to the maximum diameter position, and observe And record two dial indicator data.

Further, in the step S2, if the dial gauge data is zero, the measured product is consistent with the size of the standard ring gauge; if the dial gauge data is not zero, use the principle of proofreading parameters to convert the data into angles for comparison Adjust the equipment to further correct the size of the inner taper hole.

Further, the principle of the proofreading parameter is: using the principle of two points forming a line and trigonometric functions to calculate the taper angle of the standard ring gauge as:

α=2arctg{(D1-D2)/2(L2-L1)};

The parameters in the formula can be measured against the standard ring gauge. L1 is the distance corresponding to the reference plane of the first dial gauge, D1 is the virtual diameter of the first dial gauge at the taper hole measurement point, and L2 is the corresponding reference plane of the second dial gauge D2 is the virtual diameter of the second dial indicator at the taper hole measurement point;

When the measured data of the first dial gauge is δ1 and the data of the second dial gauge is δ2, it means that the cone angle of the tested product is different from the cone angle of the standard ring gauge, and the measured angle is α1=2arctg{(D1-D2)/ 2(L2-L1)+(δ1-δ2)/2(L2-L1)}, which can be compared with the standard ring gauge taper angle α to see if the difference is within the tolerance range; if it exceeds the tolerance range, it needs to be based on δ1 , δ2 to adjust the equipment parameters, and adjust the secondary processing appropriately according to the design tolerance.

Compared with the prior art, the present invention has the following advantages:

1. The measuring gauge and rapid measuring method in the production process of large-diameter inner tapered hole products provided by the present invention reduce labor intensity and improve production efficiency.

2. The measuring gauge and fast measuring method in the production process of the large-diameter inner tapered hole product provided by the present invention have changed the traditional one-to-one detection mode of plug gauges, achieved the effect of one gauge (gauge) with multiple uses, and also reduced the number of plug gauges. The standard production quantity reduces the production cost.

3. The measuring gauge and rapid measuring method in the production process of the large-diameter inner tapered hole product provided by the present invention can detect the product anytime and anywhere during the grinding process, and greatly reduce the probability of rejects due to the deviation of the grinding amount.

4. The measuring gauge and rapid measuring method provided by the present invention in the production process of the large-diameter inner tapered hole product can accurately measure the size of the workpiece through the present invention, improve the measurement accuracy, and realize accurate compensation.

In summary, the application of the technical solution of the present invention can solve the uniqueness of the existing technology. A plug gauge can only detect products with a tapered hole specification, and even products that exceed the tapered hole 1mm to be tested cannot be used. Design and manufacture gauges; the operability is poor. For plug gauges with large tapered holes, the weight of the gauge itself is also large or even tens of kilograms, which is extremely inconvenient to operate; the measurement accuracy is low, and traditional plug gauges cannot be directly tested. To detect the taper hole angle, it is necessary to manually judge the contact surface between the plug gauge and the inner taper hole of the product under test to draw a conclusion indirectly.

Based on the above reasons, the present invention can be widely promoted in fields such as the measurement of large-diameter inner taper holes.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Figure 1 is a simple diagram of traditional plug gauge measurement, where (a) is a front view, and (b) is a perspective view.

Fig. 2 is a structural schematic diagram of the present invention.

Fig. 3 is a schematic diagram of a partial structure of the present invention.

Fig. 4 is a structural schematic view of the invention being a measured workpiece (locomotive traction gear).

Fig. 5 is a schematic diagram of the calibration gauge of the present invention.

Fig. 6 is a schematic diagram of product measurement of the present invention.

In the figure: 1. Beam; 2. Positioning adjustment rod; 3. Table seat adjustment rod; 4. The first dial gauge; 5. The second dial gauge; 6. Positioning bolt; 7. Fixing bolt; 8. Measuring gauge 9. Standard ring gauge; 10. The product under test.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be clear that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. In the absence of a contrary description, these orientation words do not indicate or imply the device or element referred to. It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the scope of the present invention: the orientation words "inside and outside" refer to inside and outside relative to the outline of each part itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. its underlying device or construction". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of the present invention.

The present invention is mainly made up of two big structures, namely the overall gauge of support fixed structure (respectively: crossbeam 1, positioning adjustment rod 2, table seat adjustment rod 3), another structure is dial gauge (the first dial gauge 4. The second dial gauge 5), as shown in Figure 2-3. Specifically, the base of the positioning adjustment rod is installed on one side of the crossbeam through a fixing bolt, and the table base adjustment rod is installed on the other side of the crossbeam through a fixing bolt, and the positioning adjustment rod and the table base adjustment rod can be adjusted through the tightness of the fixing bolt. position on the beam. Both the bases of the positioning adjustment rod and the table seat adjustment rod can adopt upper and lower clamping blocks, and the upper and lower clamping blocks are clamped on the crossbeam by fixing bolts. The first dial gauge and the second dial gauge are connected at intervals on the watch seat adjustment rod, the first dial gauge is on the top, and the second dial gauge is on the bottom.

Before the measurement, it is necessary to use the standard ring gauge to calibrate and zero the gauge, and observe the dial indicator data to zero during the measurement. Combined with the principle of two points forming a line and trigonometric functions, the taper difference between the tapered hole and the standard ring gauge is calculated, and the taper angle of the standard ring gauge is α=2arctg{(D1-D2)/2(L2-L1)}. L1 is the distance corresponding to the reference plane in Table 1, and D1 is the virtual diameter of the measuring point of the taper hole in Table 1. Similarly, L2 is the distance corresponding to the reference plane in Table 2, and D2 is the virtual diameter of the measuring point of the taper hole in Table 2. The surface is the upper end surface of the inner hole. Through the schematic diagrams 2-3 of the present invention, it can be found that as long as the structure is slightly adjusted, the present invention can not only measure tapered holes, but also be suitable for straight holes, outer circles, and outer tapered surfaces.

The solution of the invention simplifies the detection process, improves the detection accuracy, realizes the universality and good operability of the measuring tool, can effectively save the production cost of the measuring tool of the enterprise, and directly monitors the product quality.

The present invention can solve the following technical problems:

(1) Change the one-to-one detection mode of the traditional plug gauge, and achieve the application effect of one meter (gauge) multi-purpose flexible measuring tool (the distance between the positioning adjustment rod 2 and the meter seat adjustment rod 3 can be adjusted in the schematic diagram of Figure 2 Measure the size of different tapered holes).

(2) To improve operability, the watch gauge realizes lightweight design and is easy to operate. The watch gauge itself weighs about 0.5 kilograms, while the traditional plug rules tens of kilograms. The new design not only reduces the labor intensity, but also improves the operation efficiency. It has changed the disadvantages of offline random inspection. The gauge can be checked online anytime and anywhere, which is more conducive to adjusting the tapered hole size of the machine at any time during the operation process. This detection method is suitable for mass production of high-precision tapered hole products, including rapid switching of product production (online: the product has not been placed in the operating equipment; offline: the product has been placed in the operating equipment).

(3) Improving the detection accuracy. Since the measuring standard of the gauge is fixed and there is no artificial subjective operation factor, it can directly and accurately measure the change value of the diameter of the taper hole and improve the detection accuracy of the taper.

(4) Formulate a reasonable and practical 'detection method', and strive to directly measure the change value of the hole machining taper with the simplest and most convenient operation method, so as to completely solve the problems of low detection efficiency and poor measurement accuracy.

specific embodiment

1. Measuring tools:

(1) The beam 1 (shown by the number 1 in Fig. 2 ) plays the role of connecting and fixing the overall gauge structure.

(2) The positioning adjustment rod 2 (shown by the number 2 in Fig. 2) is connected with a positioning bolt 6 below. When measuring, use the inner tapered hole as the reference to locate the overall gauge.

(3) Adjustment rod 3 (marked 3 in Figure 2) is used to fix the dial indicator. The two dial indicators on this adjustment rod are the key points of the entire gauge. The two base surfaces of the seat adjustment rod must be smooth and flat, and it must be ensured that the two base planes are at the same height as the beam, which can be determined according to the actual product.

2. Measurement method and correction principle:

(1) Before the measurement, it is necessary to use the standard ring gauge to check and zero the gauge, as shown in Figure 5. Put the watch gauge into the standard ring gauge, adjust the proper distance between the positioning adjustment rod and the watch seat adjustment rod according to the inner hole size of the standard ring gauge, and tighten the fixing bolt 7.

(2) Clamp the inner hole of the ring gauge with the positioning bolt, swing the beam, as shown in Figure 2-3, and adjust the dial indicator to zero at the position of the maximum diameter.

(3) When measuring the product, follow the same operation as step (2), observe and record the data of the two dial gauges, if the data is zero, it means that the size of the product is consistent with the standard ring gauge. If the data of the two dial gauges is not zero, it is necessary to use the principle of calibration parameters to compare and adjust the equipment according to the conversion of the data into angles to further correct the size of the tapered hole.

The principle of proofreading parameters: use the principle of two points forming a line and trigonometric functions to calculate the taper angle of the standard ring gauge α=2arctg{(D1-D2)/2(L2-L1)}. The parameters in the formula can be measured against the standard ring gauge. When the data of dial gauge 1 is δ1 and the data of table 2 is δ2, it means that the cone angle of the tested product is different from the cone angle of the standard ring gauge, and the measured angle α1=2arctg{(D1-D2)/2(L2-L1) +(δ1-δ2)/2(L2-L1)}, it can be compared with the standard cone angle α to see if the difference is within the tolerance range. If it is out of tolerance, it is necessary to adjust the equipment parameters according to δ1 and δ2, and adjust the secondary processing appropriately according to the design tolerance.

3. Example measurement and operation process:

The workpiece to be tested is a locomotive traction gear (as shown in Figure 4), and the basic parameters are:

Inner hole taper: 1:50.

Large end size of inner tapered hole:

(1) Use the standard ring gauge 9 (the standard ring gauge must pass the measurement before it can be put into use) to calibrate the gauge, so that the pointer of the dial indicator is zero. As shown in Figure 5.

(2) Put the calibrated measuring gauge 8 into the tapered hole of the product under test 10 for measurement. Record the measured value and reset the dial indicator to zero, that is, the same as the reading in operation (1), then it is qualified, as shown in Figure 6.

(3) When the reading value of the dial indicator in operation (2) does not return to zero, the difference between its value and the reading value in operation (1) is the value that needs to be processed and adjusted.

The invention has the following beneficial effects: (1) The labor intensity is reduced and the production efficiency is improved. (2) The traditional one-to-one detection mode of plug gauges has been changed, and the effect of one meter (gauge) with multiple uses has been achieved. At the same time, the production quantity of plug gauges has been reduced and the production cost has been reduced. (3) The product can be detected anytime and anywhere during the grinding process, which greatly reduces the probability of waste products due to the deviation of the grinding amount. (4) The size of the workpiece can be accurately measured through the present invention, the measurement accuracy can be improved, and accurate compensation can be realized.

Key technical points of the present invention are:

(1) To realize one table (regulation) with multiple uses.

(2) Two dial indicators can measure the difference with the standard ring gauge more accurately.

(3) Reduce human operation error, high precision and small error.

(4) Easy to operate, can realize online measurement, readable data, and accurately correct equipment parameters.

Protection point of the present invention:

(1) Design flexible gauges and gauges, formulate efficient detection methods, and cooperate with each other to develop a detection technology solution for large-diameter deep taper hole processing

(2) Two dial gauges are calibrated, and the principle of two points forming a line.

(3) The measuring gauge is composed of a positioning adjustment rod, a table base adjustment rod and a dial gauge.

(4) The method of measuring the taper of the inner hole is to measure the size and position of the two positions by a dial gauge, and calculate the taper of the inner hole.

(5) Cone angle converted from the measured value of the dial gauge and the distance from the dial gauge to the base surface: α=2arctg{(D1-D2)/2(L2-L1)}.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A gauge for measuring the production process of a large-diameter inner taper hole product is characterized by comprising the following steps: the upper part of the positioning structure is arranged on one side of the supporting structure, and the lower part of the positioning structure is in contact with the inner wall of one side of an inner hole of a workpiece to be measured during measurement; the upper portion of gauge stand adjustment structure is installed at the bearing structure opposite side, and two amesdials are installed to the lower part, and two amesdials contact with the opposite side inner wall of the hole of the work piece that is surveyed when measuring.

2. The gauge for measuring the production process of the large-diameter inner taper hole product, according to claim 1, wherein the supporting structure adopts a cross beam.

3. The gauge in the production process of the large-diameter inner taper hole product, according to claim 2, characterized in that the positioning structure comprises a first base and a positioning adjusting rod, the first base is mounted on the cross beam and can move on the cross beam, and the first base is in contact with the upper end face of one side of the inner hole during measurement; the lower extreme at first base is connected to the location adjusting lever, and the sub-unit connection of location adjusting lever has positioning bolt, and positioning bolt contacts with the one side inner wall of the hole of the work piece that is surveyed when measuring.

4. The gauge in the production process of the large-diameter inner taper hole product as claimed in claim 3, wherein the front end of the positioning bolt is a round head body, and point contact is formed between the round head body and the inner wall of the inner taper hole.

5. The gauge for measuring the large-diameter inner taper hole product in the production process according to claim 2, wherein the gauge stand adjusting structure comprises a second base and a gauge stand adjusting rod, the second base is mounted on the cross beam and can move on the cross beam, and the second base is in contact with the upper end face of the other side of the inner hole during measurement; the gauge stand adjusting rod is connected to the lower end of the second base, and the two dial gauges are installed on the gauge stand adjusting rod at intervals up and down.

6. The gauge for measuring the production process of the large-diameter inner taper hole product according to claim 3, wherein the first base is connected with the cross beam through a fixing bolt, and the bottom surface of the first base, which is in contact with the cross beam, is smooth and flat.

7. The gauge in the production process of the large-diameter inner taper hole product, according to claim 5, characterized in that the second base is connected with the cross beam through a fixing bolt, and the bottom surface of the second base, which is in contact with the cross beam, is smooth and flat.

8. A method for rapidly measuring a large-diameter inner taper hole product in a production process, which is characterized in that the measuring gauge in the production process of the large-diameter inner taper hole product according to any one of claims 1 to 7 is used, and comprises the following steps:

s1, before measurement, a standard ring gauge is used for calibrating and zeroing the gauge:

s11, placing the gauge into a standard ring gauge, adjusting the proper distance between a positioning adjusting rod and a gauge stand adjusting rod according to the size of an inner hole of the standard ring gauge, and screwing a fixing bolt;

s12, clamping an inner hole of the standard ring gauge by using a positioning bolt, swinging the cross beam, and adjusting the positions of the two dial gauges at the maximum diameter to be zero points;

s2, when a measured product is measured, the calibrated gauge is placed in an inner conical hole of the measured product to be measured, the inner conical hole is clamped by the positioning bolt, the cross beam is swung, the two dial gauges are adjusted to be in the maximum diameter position, and data of the two dial gauges are observed and recorded.

9. The method for rapidly measuring the large-diameter inner taper hole product in the production process according to claim 8, wherein in the step S2, if the data of the dial indicator is zero, the dimension of the measured product is consistent with that of a standard ring gauge; if the dial indicator data is not zero, the device is compared and adjusted according to the data conversion angle by using the correction parameter principle, and the size of the inner taper hole is further corrected.

10. The method for rapidly measuring the inner taper hole product with large diameter in the production process according to claim 9, wherein the principle of the calibration parameters is as follows: the taper angle of the standard ring gauge is calculated by utilizing the principle that two points form a line and a trigonometric function as follows:

α＝2arctg{(D1-D2)/2(L2-L1)}；

in the formula, the parameters can be compared with the metering value of a standard ring gauge, wherein L1 is the distance between the first dial indicator and the reference surface, D1 is the virtual diameter of the first dial indicator at the measuring point of the conical hole, L2 is the distance between the second dial indicator and the reference surface, and D2 is the virtual diameter of the second dial indicator at the measuring point of the conical hole;

when the measured data of the first dial indicator is delta 1 and the data of the second dial indicator is delta 2, the measured product cone angle is in or out of the cone angle of the standard ring gauge, and the measured angle is alpha 1=2arctg { (D1-D2)/2 (L2-L1) + (delta 1-delta 2)/2 (L2-L1) } and can be compared with the cone angle alpha of the standard ring gauge to determine whether the difference value is within a tolerance range;

if the tolerance range is exceeded, the equipment parameters are required to be adjusted according to delta 1 and delta 2, and the secondary machining is properly adjusted according to the design tolerance.

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