Method for detecting overall coaxiality during assembly of eccentric end socket of container

Abstract

The invention relates to the technical field of container coaxiality detection, and discloses an overall coaxiality detection method during container eccentric head assembly, which comprises the following specific steps: step 1, setting a measurement base station, placing a measurement instrument on the eccentric head side of a container cylinder, and enabling the measurement optical axis of the instrument to be close to and parallel to the overall central axis of a container; 2, adjusting a system prism constant, ensuring the measurement precision, detecting a prism target reflection constant, inputting the prism target reflection constant into a measurement system, and repeatedly measuring the same point; according to the method, the measuring instrument is placed and fixed, so that the measuring optical axis is close to and parallel to the overall central axis of the container, the measuring precision is ensured, the problems that a measuring straight line and an actual axis must coincide and repeated adjustment is needed when the instrument is placed in the past are solved, and the measuring accuracy is improved. And by using a reverse measurement method, the detection precision and the detection speed of the whole coaxiality of the measurement container are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of container coaxiality detection, and specifically to a method for detecting the overall coaxiality when assembling an eccentric head of a container. Background Technique

[0002] When manufacturing large containers, the detection of the overall coaxiality of the container is crucial, especially when assembling an eccentric head, it is more difficult to control the overall coaxiality.

[0003] In the past, the detection was generally carried out by using a micrometer collimator telescope to establish a reference axis and then calculating the distance between the center point of the eccentric head and the reference axis. There are problems such as a long detection cycle and a single detection method; especially, the measuring instrument must be placed on the reference axis, which is difficult and time-consuming, resulting in the fact that the original optical detection method can no longer meet the requirements of product construction period and accuracy.

[0004] Therefore, in view of the above problems, we propose a method for detecting the overall coaxiality when assembling an eccentric head of a container. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, in a method for detecting the overall coaxiality when assembling an eccentric head of a container designed by the present invention, a measuring instrument is placed and fixed so that the measuring optical axis is close to and parallel to the overall central axis of the container, ensuring the measurement accuracy. It solves the problem that the measuring straight line and the actual axis must coincide when placing the instrument in the past, which requires repeated adjustment. And by using the reverse measurement method, it has the advantages of improving the detection accuracy and detection speed of the overall coaxiality of the container, and solves the problems such as a long detection cycle and a single detection method in the past, where the detection is generally carried out by using a micrometer collimator telescope to establish a reference axis and then calculating the distance between the center point of the eccentric head and the reference axis; especially, the measuring instrument must be placed on the reference axis, which is difficult and time-consuming, resulting in the fact that the original optical detection method can no longer meet the requirements of product construction period and accuracy.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present invention provides the following technical solution: A method for detecting the overall coaxiality when assembling an eccentric head of a container, including the following specific steps:

[0009] Step 1: Set up a measurement base station. On the side of the eccentric head of the container cylinder, place a measuring instrument so that the measuring optical axis of the instrument is close to and parallel to the overall central axis of the container;

[0010] Step 2: Adjust the prism constant of the system to ensure the measurement accuracy. Reflect the constant of the detection prism target and input it into the measurement system, and repeatedly measure the same point;

[0011] Step 3: Establish an industrial measurement system, determine the centers of the front and rear cross-sections of the cylinder, use a central support to establish cross-central points on the quadrants of the front and rear cross-sections of the container cylinder respectively, ensure that the cross-central points inside the cylinder are the centers of the corresponding cross-sections through measurement, place measurement prism targets respectively, and measure the coordinate points a and b of the targets.

[0012] Step 4: Using the reverse measurement method, first determine the center of the eccentric head, use a central support to establish a cross-central point on the quadrant of the flange of the eccentric head, rotate the first axis of the support to the eccentric direction, measure the eccentric distance, place a prism target at the determined eccentric point, measure the coordinate point c of the target, and establish the central axis of the container cylinder using the measured coordinate points a, b, and c.

[0013] Step 5: Establish a coordinate system for the container cylinder using the central axis of the container cylinder and the front cross-section of the cylinder, calculate the coaxiality of the container cylinder, and if the coaxiality is qualified, the distance between the center of the flange of the eccentric head and the central axis of the container cylinder is qualified.

[0014] Preferably, the measurement accuracy in Step 2 is < 0.1 mm.

[0015] (III) Advantageous Effects

[0016] Compared with the prior art, the present invention provides a method for detecting the overall coaxiality when assembling an eccentric head of a container, and has the following advantageous effects:

[0017] In the method for detecting the overall coaxiality when assembling an eccentric head of a container designed by the present invention, a measuring instrument is placed and fixed, so that the measuring optical axis is close to and parallel to the overall central axis of the container, ensuring the measurement accuracy, solving the problem that the measuring line and the actual axis must coincide when placing the instrument in the past, which requires repeated adjustment, and by using the reverse measurement method, the detection accuracy and detection speed of measuring the overall coaxiality of the container are improved. Specific Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Example 1:

[0020] The method for detecting the overall coaxiality when assembling the eccentric head of the container in this embodiment is implemented according to the following steps:

[0021] 1. Set up a measurement base station, place a measuring instrument on the side of the eccentric head of the container cylinder, and make the measuring optical axis of the instrument close to and parallel to the overall central axis of the container.

[0022] II. Adjust the prism constant of the system to ensure the measurement accuracy. Detect the reflection constant of the prism target and input it into the measurement system. Measure the same point repeatedly to ensure that the measurement accuracy is < 0.1 mm.

[0023] III. Establish an industrial measurement system to determine the centers of the front and rear cross-sections of the cylinder. Use the center support to establish cross-central points on the quadrants of the front and rear cross-sections of the container cylinder respectively. Ensure that the cross-central points inside the cylinder are the centers of the corresponding cross-sections through measurement. Place the measurement prism targets respectively and measure the coordinate points a and b of the targets.

[0024] IV. Using the reverse measurement method, first determine the center of the eccentric head. Use the center support to establish a cross-central point on the quadrant of the flange of the eccentric head. Rotate the first axis of the support to the eccentric direction, measure the eccentric distance. Place the prism target at the determined eccentric point and measure the coordinate point c of the target. Establish the central axis of the container cylinder using the measured coordinate points a, b, and c.

[0025] V. Establish the coordinate system of the container cylinder using the central axis of the container cylinder and the front cross-section of the cylinder, and calculate the coaxiality of the container cylinder. If the coaxiality is less than 3 mm, the distance between the center of the flange of the eccentric head and the central axis of the container cylinder is qualified.

[0026] Example 2:

[0027] The method for detecting the overall coaxiality during the assembly of the eccentric head of the container in this embodiment is implemented according to the following steps:

[0028] I. Set up a measurement base station. Place the measuring instrument on the side of the eccentric head of the container cylinder so that the measuring optical axis of the instrument is close to and parallel to the overall central axis of the container.

[0029] II. Adjust the prism constant of the system to ensure the measurement accuracy. Input the reflection constant 34.56 of the detection prism target into the measurement system. Measure the same point repeatedly to ensure that the measurement accuracy is < 0.1 mm.

[0030] III. Establish an industrial measurement system to determine the centers of the front and rear cross-sections of the cylinder. Use the center support to establish cross-central points on the quadrants of the front and rear cross-sections of the container cylinder respectively. Ensure that the cross-central points inside the cylinder are the centers of the corresponding cross-sections through measurement. Place the measurement prism targets respectively and measure the coordinate points a and b of the targets.

[0031] IV. Using the reverse measurement method, first determine the center of the eccentric head. Use the center support to establish a cross-central point on the quadrant of the flange of the eccentric head. Rotate the first axis of the support to the eccentric direction, measure the eccentric distance. Place the prism target at the determined eccentric point and measure the coordinate point c of the target. Establish the central axis of the container cylinder using the measured coordinate points a, b, and c.

[0032] V. Establish a coordinate system for the container cylinder using the central axis of the container cylinder and the front cross-section of the cylinder, calculate the coaxiality of the container cylinder. If the coaxiality is less than 3 mm and the coaxiality is qualified, the distance between the center of the eccentric head flange and the central axis of the container cylinder is qualified.

[0033] The difference between this embodiment and the first embodiment is that in step two, the reflection constant of the prism target is obtained from the calibration certificate of the metrology and testing institution, and the reflection constant is 34.56.

[0034] Embodiment Three:

[0035] The difference between this embodiment and one of the first and second specific embodiments is that in step four, the reverse measurement method is to first determine the center of the eccentric head flange, then establish a cross center point, rotate the first axis of the bracket to the eccentric direction, determine the eccentric point according to the theoretical eccentric distance, fit the axis with the center points of the front and rear cross-sections of the container cylinder, and then calculate the overall coaxiality of the container. When the coaxiality is less than 3 mm, it means that the distance between the center of the eccentric head flange of the assembled container and the central axis of the container cylinder is qualified.

[0036] Among them, the eccentric direction quadrant is 0 degrees and the eccentric distance is 200 mm.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the overall coaxiality when assembling an eccentric head of a container, characterized in that: The specific steps include: Step 1: Set up a measurement base station and place the measuring instrument on the eccentric head side of the container body so that the measuring optical axis of the instrument is close to and parallel to the overall central axis of the container; Step 2: Adjust the system prism constant to ensure measurement accuracy, input the reflection constant of the detection prism target into the measurement system, and repeatedly measure the same point; Step 3: Establish an industrial measurement system, determine the center of the front and rear sections of the cylinder, use a center bracket to establish cross center points on the quadrants of the front and rear sections of the container cylinder, and ensure that the cross center point in the cylinder is the center of the section through measurement. Place measurement prism targets respectively and measure the coordinate points a and b of the targets; Step 4: Use the reverse measurement method to first determine the center of the eccentric head, use the center bracket to establish the cross center point on the quadrant of the eccentric head flange, rotate the bracket one axis to the eccentric direction, measure the eccentric distance, place the prism target on the determined eccentric point, measure the coordinate point c of the target, and use the measured coordinate points a, b and c to establish the central axis of the container cylinder; Step 5: Use the central axis of the container cylinder and the front section of the cylinder to establish the container cylinder coordinate system, and calculate the coaxiality of the container cylinder. If the coaxiality is qualified, the distance between the center of the eccentric head flange and the central axis of the container cylinder is qualified.

2. The method for detecting the overall coaxiality when assembling an eccentric head of a container according to claim 1, characterized in that: The measurement accuracy in step 2 is <0.1 mm.