CN105571471B - A kind of center bore is to circle glitch detection tooling and batch detector methods - Google Patents

Abstract

The invention discloses a detection tool for radial circular runout of a central hole and a batch detection method. The detection tool includes a horizontal base, two front and rear support bearings, a positioning support located above the front side of the horizontal base, and a positioning support installed on the upper part of the positioning support. The rear side and the positioning ring for positioning the detection end of the billet to be detected, the dial indicator frame located on the front side of the positioning support, and the lever dial indicator installed on the dial indicator frame; the detection process of this batch detection method As follows: 1. The first radial runout detection of the central hole: place the billet horizontally, install the dial indicator and detect the radial runout; 2. The next radial runout detection of the center hole: place the billet horizontally and detect the radial runout; 3. Step 2 is repeated several times until the detection process of the radial circular runout of the center holes of all billets to be detected is completed. The invention has the advantages of reasonable design, convenient operation and good use effect, and can detect the radial circular runout of the central hole simply and quickly, and the detection result is accurate.

Description

A center hole radial runout detection tool and batch detection method

technical field

The invention belongs to the technical field of circular runout detection, and in particular relates to a center hole radial circular runout detection tool and a batch detection method.

Background technique

Circular runout refers to the difference between the maximum and minimum readings measured by a fixed-position indicator in a given direction when the measured element rotates around the reference axis for one revolution. The circular runout tolerance is the maximum allowable variation of the indicator value when the measured element rotates one circle around the datum axis at a fixed reference point (parts and measuring instruments have no axial displacement). Circular runout tolerances can be divided into four categories according to the geometric characteristics and measurement directions of the measured elements: radial circular runout tolerances, end face circular runout tolerances, oblique circular runout tolerances and oblique (angle-given) circular runout tolerances. Among them, the radial circular runout tolerance zone is the area between two concentric circles whose radius is the tolerance value t and whose center is on the reference axis in any measurement plane perpendicular to the reference axis.

In the field of product processing, it is often necessary to process a center hole at the end of the processed billet (such as a tungsten alloy billet). The machining accuracy of the center hole, especially the radial runout tolerance, has a great influence on the subsequent finishing accuracy of the billet. Therefore, in the actual processing process, it is necessary to perform radial circular runout detection on the center hole of the processed billet tail, so as to avoid the phenomenon that the thickness finishing accuracy is affected by the large outer circle runout of the center hole at the tail of the billet.

As shown in Figure 1, when the radial circular runout detection is performed on the center hole of the tail of the billet, the detection tooling used includes a horizontal base 7, two fixed installations on the horizontal base 7 and horizontal support for the billet 1 to be inspected. The support bearing 4, the lever dial indicator 2 that is located above the front side of the horizontal base 7 and is used for radial circular runout detection of the center hole 3 to be detected at the tail of the billet 1 to be detected, and is installed above the rear side of the horizontal base 7 and is to be detected The positioning seat 6 for positioning the head of the billet 1 is installed on the inside of the positioning seat 6 with the positioning screw 5 for positioning the head of the billet 1 to be detected. When the detection tooling shown in Figure 1 is used to detect the radial circular runout of the center hole 3 to be detected, the two ends of the rod blank 1 to be detected that have been ground at the end of the outer circle are placed on the two support bearings 4 respectively, and Make the end of the billet 1 to be detected that is not provided with a central hole lean against the positioning screw 5 and always be in close contact with the positioning screw 5, and place a dial indicator frame 10 at the end of the billet 1 to be detected that is provided with the central hole 3 to be detected, Insert the measuring head (also called gauge head or measuring head) of the lever dial indicator 2 into the central hole 3 to be tested and contact with its tapered surface. After adjusting the pressure of the measuring head of the lever dial indicator 2, turn the billet to be tested. 1 for more than one week, and read the difference between the maximum reading and the minimum reading of the lever dial indicator 2, and record it as the beating value of the outer circle of the central hole 3 to be tested, the difference between the maximum reading and the minimum reading required by the process (that is, the radial Circular runout tolerance) is not greater than 0.15mm.

In the actual use process, when the detection tooling shown in Figure 1 is used to detect the radial circular runout of the center hole 3 to be tested, there are the following defects:

First, the detection efficiency is low: since each billet 1 to be inspected needs to be removed the dial indicator frame 10 first, and then the billet 1 to be inspected is placed and held against the positioning screw 5; then the dial indicator is readjusted Table frame 10 and adjust the pressure of the measuring head of the lever dial indicator 2; then, rotate the billet 1 to be detected for more than one week, and read the value. Since the center hole is A2/5 (A2/5 means that the center hole is type A, the diameter of the guide hole is Φ2mm, and the diameter of the end surface of the tapered hole is Φ5mm, see the standard GB/T4459.5), the hole is small and the depth is shallow, because the dial indicator The adjustment of the meter frame 10 and the dial gauge measuring head consumes manpower and time every time. The inspectors can only inspect nearly 40 billets 1 to be inspected during repeated debugging in each shift, and the inspection progress cannot meet the production demand.

Second, the post-positioning method using the positioning screw affects the measurement results: when the billet 1 to be detected is a forged tungsten alloy billet as shown in Figure 2, the post-forging machining process of the tungsten alloy billet is: Flat S-end face, center hole drilling, rough-turning S-end outer circle, finish-turning S-end outer circle, trimming head (D-end), grinding S-end outer circle, aligning total length (D-end) and inspection. The end face of the S end with a central hole is produced when the D end is in a blank state, so the runout value of the S end end face will be large; and the runout value of the D end end face will also be affected by the accuracy of the equipment and the operation of the personnel. Not small either. From the data measured in production, the maximum runout of the S-end and D-end reaches 0.16mm and 0.08mm respectively; even for tungsten alloy billets of similar products with stricter requirements, the maximum end-face runout is 0.05mm. As shown in Figure 3, the runout of the end face of D end can be considered to be caused by the end face of D end being an inclined plane. If point E is the measurement point of the lever dial indicator 2 and the tungsten alloy billet, the runout value of the end face should be equal to DC The length of the line segment.

If the detection tooling as shown in Figure 1 is used to monitor the runout value of the outer circle of the center hole of the tungsten alloy billet whose end face at the D end is inclined, the contact point between the positioning screw 5 and the end face of the D end is also point E, and the line segment AE The length is about 4mm, of which the total length of the tungsten alloy billet is 625mm and the length of the S end is 220mm.

As shown in Figure 4, the measuring head (also called gauge head) of lever indicator 2 also has a relative movement in the center hole (that is, the center hole 3 to be detected) during measurement (specifically, it moves between point C and point F) , then the length of the line segment DF is the value of the additional impact on the measured value of the outer circle runout of the center hole due to the runout of the end face. According to the runout of 0.05mm, the length of line segment DC is 0.05mm, the taper of the central hole is 60°, ∠FCD=30°, then line segment DF=CD×tg30°=0.029mm. The process requires that the runout of the outer circle of the center hole is not more than 0.15mm, and the maximum error value due to the end face factor is close to 0.03mm, reaching 20% of the value required by the process. Therefore, the post-positioning method in which the positioning screw 5 is used to position the end of the billet 1 to be tested without a central hole will have a greater impact on the radial runout detection results.

Third, the detection data is affected by the radial runout value of the product: when the detection tooling as shown in Figure 1 is used to detect the radial circular runout of the center hole, the billet 1 to be tested is placed on two support bearings 4, and the support bearings 4 and The distance between the two ends of the billet 1 to be inspected is about 100mm; then, the radial runout value is tested by measuring the radial runout value in the middle of the billet 1 to be inspected. The maximum allowable value of the process is 0.07mm. In actual production, the radial runout is mostly 0.05mm ~0.07mm.

As shown in FIG. 5 , the bent billet 1 to be inspected is simplified into a line; A ₁ B ₁ C ₁ is the billet 1 to be inspected, and two points E ₁ and D ₁ are the supporting points of the supporting bearing 4 . When measuring the radial runout or measuring the runout of the center hole, the billet ₁ to be detected makes a circular motion with the line connecting the two points _E1 and _D1 as the axis. The detection of the radial runout of the billet 1 is actually the length of the line connecting the two points _B1 and b. For example, when the runout of the center hole is measured at point _A1 , the actual measured value is the length of the line connecting point _A1 and point a, and this value is entirely due to the systematic error value caused by improper selection of the measuring device.

It is known that A ₁ B ₁ +B ₁ C ₁ = 600mm, A ₁ E ₁ = 100mm, B ₁ bmax = 0.07mm, ⊿B ₁ E ₁ b∽⊿A ₁ E ₁ a, A ₁ E ₁ /E ₁ b =A ₁ a/B ₁ b=1:2, then A ₁ amax=0.035mm. The process requires that the runout of the outer circle of the central hole is not greater than 0.15mm, and the error value affected by the support distance during measurement is at most 0.035mm, reaching 23% of the value required by the process. Therefore, the detection data is greatly affected by the radial runout value of the product.

It can be seen from the above that when using the existing detection tooling as shown in Figure 1 to detect the radial runout of the central hole (that is, the detection of the outer circular runout of the central hole), not only the operation is complicated, the detection efficiency is extremely low, and it cannot meet the batch detection requirements; and The detection data is also affected by the structure of the tooling itself. The detection data deviates from the actual value, the detection accuracy is low, the detection data accuracy is low, and the measurement result has a large error, which cannot meet the needs of finishing.

Contents of the invention

The technical problem to be solved by the present invention is to provide a center hole radial runout detection tool for the above-mentioned deficiencies in the prior art. The radial circular runout of the center hole is detected, and the detection result is accurate.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a radial circular runout detection tool for the center hole, which is characterized in that it includes a horizontal base, and the front and rear two bars to be tested are horizontally supported and can be mounted on the horizontal base. The supporting bearing for front and rear translation, the positioning support above the front side of the horizontal base, the positioning ring installed on the upper rear side of the positioning support and for positioning the detection end of the billet to be tested, the percentage located at the front side of the positioning support A gauge frame and a lever dial indicator mounted on the dial gauge frame, the front end of the bar blank to be detected is the detection end and the center hole opened in the middle is the center hole to be detected; the rod to be detected The blanks are arranged horizontally and parallel to the horizontal base; the structure and size of the two supporting bearings are the same and both are installed on the horizontal base; the two supporting bearings are arranged in parallel and both Arranged vertically with the horizontal base, the two support bearings are arranged on the same horizontal plane and the two are respectively the front support bearing located above the front side of the horizontal base and the rear support bearing located above the rear side of the horizontal base; The positioning support and the positioning ring are arranged in parallel and both are vertically arranged with the horizontal base. The upper part of the positioning support has a through hole for the measuring head of the lever dial indicator to pass through. The positioning ring is ring and it is located at the rear side of the through hole, the measuring head of the lever dial indicator passes through the through hole and the inside of the positioning ring from front to back and extends into the center hole to be detected of the billet to be detected; The lever dial indicator, the positioning support, the positioning ring, the front support bearing and the rear support bearing are arranged from front to back along the central axis of the horizontal base;

The above-mentioned tool for detecting the radial runout of the central hole is characterized in that: the positioning support is an L-shaped support and is fixed on the horizontal base by a plurality of second connecting bolts.

The above-mentioned tool for detecting the radial runout of the center hole is characterized in that: the horizontal base is provided with translation grooves for the two support bearings to translate back and forth, and the translation grooves are arranged along the length direction of the horizontal base .

The above-mentioned tool for detecting radial runout of the center hole is characterized in that: the two support bearings have the same structure and include a horizontally arranged bearing seat and two support bearings respectively installed on the left and right sides of the bearing seat. The two support bearings are arranged vertically with the horizontal base and both are arranged on the same vertical plane, and the two support bearings are symmetrically supported under the left and right sides of the billet to be detected.

The above-mentioned tool for detecting radial runout of the central hole is characterized in that: the bearing seat is fixed on the horizontal base through two rows of first connecting bolts on the left and right; On the left and right sides of the base, the two translation grooves are respectively sliding grooves for the front and rear translation of the two rows of the first connecting bolts.

The above-mentioned tool for detecting the radial runout of the central hole is characterized in that: it also includes a magnetic watch base fixedly installed above the front side of the horizontal base, and the dial indicator stand is installed on the magnetic watch base; the horizontal base It is rectangular and its cross-sectional shape is an inverted concave shape.

The above-mentioned tool for detecting radial runout of the central hole is characterized in that: the through hole is a cylindrical hole and is arranged coaxially with the positioning ring, and the bar blank to be detected is arranged coaxially with the through hole.

The above-mentioned tool for detecting radial runout of the center hole is characterized in that: the section of the bar blank to be detected located on the front side of the front support bearing is the front end section, and the section of the bar blank to be detected located at the rear The segment on the rear side of the side support bearing is the rear end segment, the length of the front end segment and the rear end segment is the same and the length of both is c2×L, where L is the length of the billet to be detected,

At the same time, the invention also discloses a batch detection method for the radial circular runout of the central hole with simple steps, reasonable design, convenient implementation, high detection efficiency and good use effect. Multiple billets to be inspected of the same specification are inspected for the radial runout of the center hole, and the inspection process is as follows:

Step 1. The first radial runout detection of the center hole: using the detection tool to detect the radial runout of the center hole on the first bar to be detected, the process is as follows:

Step 101, placing the bar blank horizontally: place the currently detected bar blank on the two support bearings horizontally, and make the detection end of the bar blank to be detected abut against the rear end surface of the positioning ring;

Step 102, dial indicator installation: install the lever dial indicator on the dial indicator stand, and then adjust the position of the lever dial indicator backwards so that the measuring head of the lever dial indicator runs from front to back through the through hole and the inside of the locating ring until the measuring head of the lever dial indicator extends into the center hole to be detected of the billet to be tested described in step 101 and contacts the inner side wall of the center hole to be tested, and the lever dial indicator is completed. The installation process; after the installation is completed, the position of the lever dial indicator is fixed;

Step 103, Radial circular runout detection: Rotate the billet to be detected in step 101 for more than one week, during the rotation process, use the lever dial indicator described in step 102 to perform radial circular runout detection, and record the lever dial indicator The maximum reading and the minimum reading, the recorded difference between the maximum reading and the minimum reading of the lever dial indicator is the radial circular runout tolerance of the center hole of the billet to be detected described in step 101;

Step 2. The next detection of the radial runout of the center hole: the detection tooling described in step 1 is used to detect the radial runout of the center hole of the next billet to be detected. The process is as follows:

Step 201, place the bar blank horizontally: firstly tilt the detection end of the currently detected bar blank downwards, and make the measuring head of the lever dial indicator in step 102 extend into the bar blank to be detected. In the detection center hole; then place the billet to be detected horizontally on the two support bearings, and make the detection end of the billet to be detected lean against the rear end surface of the positioning ring;

Step 202. Radial circular runout detection: according to the method described in step 103, perform radial circular runout detection on the currently detected billets to be detected;

Step 3: Step 2 is repeated multiple times until the detection process of the radial circular runout of the central holes of all the billets to be detected is completed.

The above method is characterized in that: the dial indicator frame is installed on a magnetic table base, the magnetic table base is located on the central axis of the horizontal base and can be translated back and forth on the horizontal base;

When adjusting the position of the lever dial indicator backward in step 102, the position of the lever dial indicator is adjusted backward by moving the magnetic base backward; after the lever dial indicator is adjusted in place, adjust the magnetic base Lock and fix;

When the measuring head of the lever dial indicator in step 102 is in contact with the inner side wall of the central hole to be detected, the dial of the lever dial indicator shows that the pressing depth of the measuring head is 0.4 mm to 0.5 mm; step 201 After the bar blank is placed horizontally, the dial of the lever dial indicator shows that the indentation depth of the measuring head is 0.4 mm to 0.5 mm.

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

1. The detection tooling adopted is simple in structure, reasonable in design, easy in processing and production, and low in input cost.

2. The detection tooling used is easy to use and operate, and can easily and quickly detect the radial circular runout of the central hole.

3. The detection efficiency of the detection tool is high. Compared with the existing detection tool, the detection efficiency is increased by 5-8 times.

4. The detection tooling used is effective and the detection results are accurate, and has the following advantages: First, reduce manufacturing errors and costs: the horizontal base of the existing detection tooling (the base is a universal base) can be directly used, reducing The error caused by the manufacture of the base; and reduce the manufacturing cost; second, reduce the positioning error: the positioning ring is used to replace the positioning screw, and the positioning is performed at the front end, so that the bar to be detected is changed from point positioning to surface positioning. The positioning method enhances the stability of the measurement and positioning, and eliminates the detection error caused by the axial movement during the measurement process caused by the uneven end surface; third, reduces the error caused by the support: move the support bearing to the position of the end surface of the billet Nearby, it greatly reduces the inaccurate measurement of center hole beating caused by the introduction of other shape and position errors due to improper selection of support points; fourth, saves detection time and auxiliary operation time: after the table frame is fixed once, it does not need to be disassembled repeatedly. When measuring, lean the billet forward, first contact the inclined surface of the center hole with the meter head, and then lay the billet flat for inspection. After the inspection, pick up the rear end first, let the meter head exit the center hole, and then change the material to measure ; Compared with the original measurement method, the production efficiency has been increased by more than 5 times; Fifth, the measuring head of the lever dial indicator is fixed, which reduces the uncertainty of measurement error and improves the accuracy of detection data.

5. The batch detection method for the radial circular runout of the central hole adopted has simple steps, reasonable design, convenient implementation, high detection efficiency, good use effect, easy operation, and time saving. It can not only greatly improve the detection efficiency, but also improve the accuracy of the detection data. A substantial increase. In order to improve the accuracy of detection data, the present invention changes the original positioning method, eliminates the error caused by improper positioning, and can effectively prevent the axial movement of the billet during the detection process; The sub-gauge is fixed, reducing the time to adjust the pressure of the gauge head. Therefore, the adoption of the present invention can effectively improve the accuracy of detection data and improve detection efficiency.

To sum up, the present invention is reasonable in design, easy to operate and good in use effect, and can detect the radial circular runout of the central hole simply and quickly, and the detection result is accurate.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a reference diagram of the use state of the existing center hole radial circular runout detection tool.

Fig. 2 is a schematic diagram of a forging blank of a tungsten alloy bar blank for radial circular runout detection using existing detection tooling.

Figure 3 is a schematic diagram of the enlarged structure of the D end when the existing detection tool is used to detect the radial circular runout of the tungsten alloy billet.

Fig. 4 is a schematic diagram showing that the center hole measurement is affected by the end surface runout when the existing detection tool is used to detect the radial circular runout of the tungsten alloy billet.

Fig. 5 is a schematic diagram of the influence of radial runout on the measurement of the center hole when the existing detection tool is used to detect the radial circular runout of the tungsten alloy billet.

Fig. 6 is a reference diagram of the use state of the radial circular runout detection tool of the central hole of the present invention.

Fig. 7 is a structural schematic diagram of a horizontal base, a support bearing and a bar to be inspected according to the present invention.

Fig. 8 is a schematic diagram of the planar structure of the present invention except the dial indicator, the dial indicator frame, the magnetic base and the positioning ring.

Fig. 9 is a flowchart of a method for batch detection of radial circular runout of central holes by using the present invention. Explanation of reference signs:

1—Bar blank to be tested; 2—Lever dial indicator; 3—Central hole to be tested;

4—support bearing; 4-1—bearing seat; 4-2—support bearing;

4-3—the first connecting bolt; 5—positioning screw; 6—positioning seat;

7—horizontal base; 8—horizontal base; 9—locating ring;

10—Dial indicator frame; 11—Positioning support; 11-1—Through hole;

11-2—the second connecting bolt; 12—magnetic table base; 13—translation groove.

Detailed ways

As shown in Fig. 6, Fig. 7 and Fig. 8, a center hole radial circular runout detection tool includes a horizontal base 8, and two front and rear bars 1 to be tested are horizontally supported and can be translated back and forth on the horizontal base 8 The supporting bearing 4, the positioning support 11 located above the front side of the horizontal base 8, the positioning ring 9 installed on the upper rear side of the positioning support 11 and positioning the detection end of the billet 1 to be detected, located in front of the positioning support 11 The dial indicator frame 10 on the side and the lever dial indicator 2 installed on the dial indicator frame 10, the front end of the bar blank 1 to be detected is the detection end and the central hole opened in the middle is the detection end. Center hole 3. The bar blank 1 to be detected is arranged horizontally and parallel to the horizontal base 8 . The structure and size of the two support bearings 4 are the same and both are installed on the horizontal base 8. The two support bearings 4 are arranged in parallel and both are arranged vertically with the horizontal base 8. The support bearings 4 are arranged on the same horizontal plane, and the two are respectively the front support bearing located above the front side of the horizontal base 8 and the rear support bearing located above the rear side of the horizontal base 8 . The positioning support 11 and the positioning ring 9 are arranged in parallel and both are vertically arranged with the horizontal base 8, and the upper part of the positioning support 11 is provided with a through hole 11 for the measuring head of the lever dial indicator 2 to pass through. -1, the positioning ring 9 is a circular ring and it is located on the back side of the through hole 11-1, and the measuring head of the lever dial indicator 2 passes through the through hole 11-1 and the inside of the positioning ring 9 from front to back And extend into the center hole 3 to be detected of the bar blank 1 to be detected. The lever dial indicator 2, the positioning support 11, the positioning ring 9, the front support bearing and the rear support bearing are arranged along the central axis of the horizontal base 8 from front to back.

In actual use, the section of the bar blank 1 to be detected that is located at the front side of the front support bearing is the front end segment, and the section of the bar blank 1 to be detected that is located at the rear side of the rear support bearing is The rear end segment, the length of the front end segment and the rear end segment is the same and the length of both is c2×L, where L is the length of the billet 1 to be detected,

In actual use, the values of c1 and c2 can be adjusted accordingly according to specific needs.

It can be seen from Figure 5 that the smaller the radial runout (B ₁ b value) of the billet 1 to be detected, the smaller the impact of this measurement method on the measurement of the center hole; the distance between the support points E ₁ and D ₁ from both ends of the billet The closer ₁ and C ₁ are, the smaller the influence of the measurement method on the measurement of the center hole. In this embodiment, before the measurement, the positions of the two support bearings 4 are adjusted so that the support points of the two support bearings 4 are respectively located at 1/9 of the front and rear ends of the billet 1 to be tested.

In this embodiment, the two supporting bearings 4 have the same structure and include a horizontally arranged bearing seat 4-1 and two supporting bearings 4-2 respectively installed on the left and right sides of the bearing seat 4-1. The two support bearings 4-2 are vertically arranged with the horizontal base 8 and both are arranged on the same vertical plane, and the two support bearings 4-2 are symmetrically supported under the left and right sides of the billet 1 to be detected .

In this embodiment, the positioning support 11 is an L-shaped support and is fixed on the horizontal base 8 by a plurality of second connecting bolts 11 - 2 .

In addition, the lower rear part of the positioning support 11 has a groove for the bearing seat 4-1 of the front support bearing to be installed. In this embodiment, the number of the second connecting bolts 11 - 2 is two and they are installed on the left and right sides of the horizontal base 8 respectively, and the two second connecting bolts 11 - 2 are arranged symmetrically.

During actual processing, the horizontal base 8 is provided with translation slots 13 for the two support bearings 4 to translate back and forth, and the translation slots 13 are arranged along the length direction of the horizontal base 8 .

In this embodiment, the bearing seat 4-1 is fixed on the horizontal base 8 by two rows of left and right first connecting bolts 4-3; the number of the translation grooves 13 is two, and the two are respectively arranged on the horizontal base On the left and right sides of 8, the two translation grooves 13 are respectively sliding grooves for the front and rear translation of the two rows of the first connecting bolts 4-3.

Moreover, each row of the first connecting bolts 4-3 includes two front and rear first connecting bolts 4-3, and the two rows of the first connecting bolts 4-3 are installed in the two translation grooves 13 respectively. Inside.

At the same time, the central hole radial runout detection tooling of the present invention also includes a magnetic base 12 fixedly installed above the front side of the horizontal base 8 , and the dial gauge frame 10 is mounted on the magnetic base 12 .

In this embodiment, the horizontal base 8 is rectangular and its cross-sectional shape is an inverted concave shape. Moreover, the magnetic watch base 12 is locked and fixed on the horizontal base 8 by a locking member.

In this embodiment, the through hole 11 - 1 is a cylindrical hole and is arranged coaxially with the positioning ring 9 .

Moreover, the bar blank 1 to be inspected is arranged coaxially with the through hole 11-1.

A batch detection method for the radial circular runout of the central hole as shown in Figure 9, using the detection tool as shown in Figure 6 to detect the radial circular runout of the central hole for a plurality of billets 1 to be detected of the same specification from front to back , the detection process is as follows:

Step 1. The first detection of the radial runout of the center hole: using the detection tool to detect the radial runout of the center hole on the first bar blank 1 to be detected, the process is as follows:

Step 101, placing the bar blank horizontally: place the currently detected bar blank 1 horizontally on the two support bearings 4, and make the detection end of the bar blank 1 to be tested stick to the back of the positioning ring 9 end face;

Step 102, installation of the dial indicator: install the lever dial indicator 2 on the dial indicator stand 10, and then adjust the position of the lever dial indicator 2 backwards so that the measuring head of the lever dial indicator 2 moves from front to Then pass through the through hole 11-1 and the inside of the positioning ring 9 until the measuring head of the lever dial indicator 2 extends into the center hole 3 of the billet 1 to be tested in step 101 and connects with the center hole to be tested. 3, the installation process of the lever dial indicator 2 is completed; after the installation is completed, the position of the lever dial indicator 2 is fixed;

Step 103, Radial circular runout detection: Rotate the billet 1 to be detected in step 101 for more than one revolution, and perform radial circular runout detection through the lever dial indicator 2 described in step 102 during the rotation process, and record the lever percentage The maximum reading and the minimum reading of Table 2, the difference between the maximum reading and the minimum reading of the recorded lever dial indicator 2 is the radial circular runout tolerance of the center hole of the billet 1 to be detected described in step 101;

Step 2. The next detection of the radial runout of the center hole: the detection tooling described in step 1 is used to detect the radial runout of the center hole of the next billet 1 to be detected. The process is as follows:

Step 201, place the bar blank horizontally: firstly tilt the detection end of the currently detected bar blank 1 downwards, and make the measuring head of the lever dial indicator 2 in step 102 extend into the bar blank to be tested 1 in the central hole 3 to be detected; then place the billet 1 to be detected horizontally on the two support bearings 4, and make the detection end of the billet 1 to be detected lean against the rear end surface of the positioning ring 9 ;

Step 202. Radial circular runout detection: according to the method described in step 103, perform radial circular runout detection on the currently detected billet 1 to be detected;

Step 3: Step 2 is repeated multiple times until the detection process of the radial circular runout of the central holes of all the billets 1 to be detected is completed.

Wherein, multiple to-be-inspected bar blanks 1 of the same specification refer to the same structure and size of the plurality of to-be-inspected bar blanks 1 .

In this embodiment, the dial indicator frame 10 is installed on a magnetic table base 12, and the magnetic table base 12 is located on the central axis of the horizontal base 8 and can be translated back and forth on the horizontal base 8;

When the position of the lever dial indicator 2 is adjusted backward in step 102, the position of the lever dial indicator 2 is adjusted backward by moving the magnetic base 12 backward; The magnetic table base 12 is locked and fixed;

When the measuring head of the lever dial indicator 2 in step 102 is in contact with the inner side wall of the center hole 3 to be tested, the dial of the lever dial indicator 2 shows that the pressing depth of the measuring head is 0.4 mm to 0.5 mm ; After the bar blank is placed horizontally in step 201, the dial of the lever dial indicator 2 shows that the indentation depth of the measuring head is 0.4 mm to 0.5 mm.

In actual use, the radial circular runout detection method described in step 103 is a conventional detection method for the lever dial indicator 2 . The measuring head of the lever dial indicator 2 is installed on its measuring rod, and the measuring rod is equipped with a spring, and the measuring pressure of the measuring head is regulated by the spring. When the measuring head of the lever dial indicator 2 described in step 102 is in contact with the inner sidewall of the central hole 3 to be detected, the measuring head maintains a certain measuring pressure, which is shown on the dial of the lever dial indicator 2 according to the measured pressure. Determine the indentation depth of the measuring head described above.

In this embodiment, the central hole 3 to be detected is an A-shaped central hole.

It can be seen from the above that the batch detection method for the radial runout of the center hole adopted by the present invention is simple, reasonable in design, easy to operate, convenient to implement and good in use effect. On the support bearing 4, and the detection end of the billet 1 to be detected leans against the positioning ring 9 (the positioning ring 9 is a ring processed by a flat plate); then the lever dial indicator 2 is installed, and by adjusting the magnetic base 12 position, make the measuring head of the lever dial indicator 2 extend into the central hole 3 to be tested, and then lock and fix the magnetic base 12; at the same time, it is necessary to adjust the measuring head of the lever dial indicator 2 so that the measurement The head is in full contact with the tapered surface of the central hole 3 to be tested (that is, the hole wall of the tapered hole in the central hole 3 to be tested), and a certain pressure is maintained, and the knob between the measuring head and the measuring rod is locked; Detect the billet 1, read the maximum value and the minimum value of the dial of the lever dial indicator 2, take the difference as the runout error of the center hole circle (also called the center hole radial circle runout tolerance), and complete the measurement. After the measurement is completed, the rear end of the billet 1 to be inspected is slightly lifted, and the billet 1 to be inspected is removed.

Afterwards, when detecting the radial circular runout of the central hole on a plurality of billets 1 to be detected in the same batch, it is not necessary to adjust the gauge head pressure of the lever dial indicator 2, and the measurement can be carried out directly. When detecting the radial circular runout of the center hole for the next billet 1 to be detected, the end of the billet 1 to be detected that is provided with the center hole 3 to be detected (that is, the detection end) is slightly inclined downward, and lightly leans against the positioning ring 9 , and then place the billet 1 to be tested horizontally on the two support bearings 4. At this time, the position of the lever dial indicator 2 does not need to be adjusted. With full contact and a certain pressure, turn the billet 1 to be tested to read directly; after the measurement is completed, remove the billet 1 to be tested; after that, and so on, until the radial circular runout of the central hole of a large number of billet 1 to be tested is completed detection process.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (9)

1. a kind of center bore to circle glitch detection tooling, it is characterised in that：Including horizontal base (8), former and later two are to be checked Bar stock (1) is surveyed to carry out spring bearing (4) horizontally-supported and that anterior-posterior translation can be carried out on horizontal base (8), be located at horizontal base The positioning support (11) of seat (8) front side top, the detection for being mounted on rear side of positioning support (11) top and treating detection bar stock (1) It holds the locating ring (9) positioned, the percentage table skeleton (10) being located on front side of positioning support (11) and is installed on percentage table skeleton (10) lever indicator (2) on, the centre bore that the front end of the bar stock (1) to be detected is opened by the test side and its middle part For centre bore to be detected (3)；The bar stock to be detected (1) in horizontal layout and its with horizontal base (8) be in parallel laying；Two The structure snd size all same and the two of the spring bearing (4) are installed on horizontal base (8), two spring bearings (4) it is in parallel laying and the two with horizontal base (8) perpendicular laying, two spring bearings (4) are laid in same water In plane and the two is respectively positioned at the front side spring bearing of horizontal base (8) front side top and on rear side of horizontal base (8) The Backside support bearing of top；The positioning support (11) and locating ring (9) in parallel laying and the two with horizontal base (8) Perpendicular laying, positioning support (11) top are provided with the through-hole (11-1) passed through for the measurement head of lever indicator (2), institute State locating ring (9) be annulus and its be located at the rear side of through-hole (11-1), the measurement head of the lever indicator (2) from front to back from It is pierced by and is stretched in the centre bore to be detected (3) of bar stock to be detected (1) inside through-hole (11-1) and locating ring (9)；The thick stick Bar dial gauge (2), positioning support (11), locating ring (9), the front side spring bearing and the Backside support bearing are along horizontal base The central axis of seat (8) is laid from front to back；

Space D=c1 × L between two spring bearings (4), wherein L are the length of bar stock to be detected (1),

It is front end segment, the stick to be detected to be located at the segment on front side of the front side spring bearing in the bar stock to be detected (1) It is rear end segment to be located at the segment on rear side of the Backside support bearing in base (1), the front end segment and the rear end segment Length is identical and the length of the two is c2 × L, and wherein L is the length of bar stock to be detected (1),

2. a kind of center bore described in accordance with the claim 1 to circle glitch detection tooling, it is characterised in that：The positioning support (11) be L-shaped bearing and its by it is multiple second connect bolts (11-2) be fixed on horizontal base (8).

3. according to a kind of center bore as claimed in claim 1 or 2 to circle glitch detection tooling, it is characterised in that：The level The translation slot (13) that anterior-posterior translation is carried out for two spring bearings (4) is provided on pedestal (8), the translation slot (13) is along water The length direction of flat pedestal (8) is laid.

4. a kind of center bore described in accordance with the claim 3 to circle glitch detection tooling, it is characterised in that：Two supports The structure of bearing (4) is identical and it includes being separately mounted to bearing block (4-1) left side in the bearing block (4-1) of horizontal layout and two Bearing support (4-2) above right both sides, two bearing supports (4-2) with horizontal base (8) it is perpendicular laying and two Person is laid on same vertical plane, and two bearing support (4-2) symmetric supports are under the left and right sides of bar stock to be detected (1) Side.

5. according to claim 4 a kind of center bore to circle glitch detection tooling, it is characterised in that：The bearing block (4-1) ranked first connection bolt (4-3) by left and right two and be fixed on horizontal base (8)；It is described translation slot (13) quantity be Two and the two are laid in the left and right sides of horizontal base (8) respectively, and two translation slots (13) are respectively for described in two rows First connection bolt (4-3) carries out the slippage slot of anterior-posterior translation.

6. according to a kind of center bore as claimed in claim 1 or 2 to circle glitch detection tooling, it is characterised in that：Further include solid Dingan County is mounted in the Magnetic gauge stand (12) of horizontal base (8) front side top, and the percentage table skeleton (10) is mounted on Magnetic gauge stand (12) on；The horizontal base (8) is rectangle and its cross-sectional shape is undercut shape.

7. according to a kind of center bore as claimed in claim 1 or 2 to circle glitch detection tooling, it is characterised in that：The through-hole (11-1) is cylindrical hole and itself and locating ring (9) is in coaxial laying, and the bar stock (1) to be detected is with through-hole (11-1) in coaxial It lays.

8. a kind of centre bore radial run-out for treating detection bar stock using detecting tool as described in claim 1 carries out batch inspection The method of survey, it is characterised in that：The bar stock to be detected (1) of multiple same specifications is carried out from front to back using the detecting tool For center bore to circle glitch detection, detection process is as follows：

Step 1: for the first time center bore to circle glitch detection：Using first bar stock (1) to be detected of the detecting tool pair Center bore is carried out to circle glitch detection, process is as follows：

Step 101, bar stock are horizontal positioned：The bar stock to be detected (1) currently detected is placed horizontally at two support shafts It holds on (4), and the test side of bar stock to be detected (1) is made to stick on the rear end face of locating ring (9)；

Step 102, dial gauge installation：Lever indicator (2) is mounted on percentage table skeleton (10), then to lever indicator (2) position is adjusted backward, makes the measurement head of lever indicator (2) from front to back from through-hole (11-1) and locating ring (9) Inside is pierced by, until the measurement head of lever indicator (2) stretch to bar stock (1) to be detected described in step 101 it is to be detected in It is contacted in heart hole (3) and with the madial wall of centre bore to be detected (3), completes the installation process of lever indicator (2)；Installation is complete Afterwards, the position of the lever indicator (2) is fixed；

Step 103, radial run-out detection：Bar stock to be detected (1) described in step 101 is rotated one week or more, rotation process In radial run-out detection carried out by lever indicator described in step 102 (2), and record the maximum of lever indicator (2) Reading and least count, the full-scale reading of the lever indicator recorded (2) and the difference of least count are to be waited for described in step 101 Detect bar stock (1) center bore to circle run-out tolerance；

Step 2: next time center bore to circle glitch detection：It described is waited for next using detecting tool described in step 1 It detects bar stock (1) and carries out center bore to circle glitch detection, process is as follows：

Step 201, bar stock are horizontal positioned：First the test side of the bar stock to be detected (1) currently detected is tilted down, and The measurement head of lever indicator described in step 102 (2) is set to stretch in the centre bore to be detected (3) of bar stock to be detected (1)；Again Bar stock to be detected (1) is placed horizontally on two spring bearings (4), and makes the test side of bar stock to be detected (1) It sticks on the rear end face of locating ring (9)；

Step 202, radial run-out detection：According to the method described in step 103, to the bar stock to be detected currently detected (1) radial run-out detection is carried out；

Step 3: step 2 is repeated several times, until completing the center bores of all bar stocks (1) to be detected to circle glitch detection mistake Journey.

9. according to the method for claim 8, it is characterised in that：The percentage table skeleton (10) is mounted on Magnetic gauge stand (12) On, the Magnetic gauge stand (12) is located on the central axis of horizontal base (8) and it can carry out front and back put down on horizontal base (8) It moves；

It is right by translating Magnetic gauge stand (12) backward when being adjusted backward to the position of lever indicator (2) in step 102 The position of lever indicator (2) is adjusted backward；After lever indicator (2) is adjusted in place, Magnetic gauge stand (12) are carried out It is locked；

When the measurement head of lever indicator described in step 102 (2) is contacted with the madial wall of centre bore to be detected (3), the thick stick Show that the compression distance of the measurement head is 0.4mm~0.5mm on the dial plate of bar dial gauge (2)；Bar stock water is completed in step 201 After placing flat, show that the compression distance of the measurement head is 0.4mm~0.5mm on the dial plate of the lever indicator (2).