Detection device and detection process for surface roughness of red copper capillary tube

Abstract

The invention discloses a red copper capillary surface roughness detection device and technology, and the device comprises a pedestal, the top of the pedestal is correspondingly and movably provided with a first screw rod sliding table and a second screw rod sliding table, the first screw rod sliding table and the second screw rod sliding table are driven by a motor, one side of the first screw rod sliding table is provided with a first positioning clamp, and the other side of the first screw rod sliding table is provided with a second positioning clamp. A first positioning clamp is installed on one side of the first lead screw sliding table, a second positioning clamp is installed on one side of the second lead screw sliding table, a red copper capillary tube is clamped between the first positioning clamp and the second positioning clamp, an installation cover and a receiver are further correspondingly and fixedly installed on the base, and a plurality of laser emitters are circumferentially and evenly distributed on one side of the installation cover. Comprising the following steps that S1, the red copper capillary tube is installed between a first positioning clamp and a second positioning clamp, a first lead screw sliding table and a second lead screw sliding table are driven to move, and the axial position of the red copper capillary tube is adjusted, so that a laser incidence point of a laser transmitter is located at one end of the red copper capillary tube.

Description

Technical Field

[0001] The present invention belongs to the technical field of roughness detection, and particularly relates to a detection device and a detection process for the surface roughness of a copper capillary tube. Background Art

[0002] A copper capillary tube is a thin tube made of copper, usually having an outer diameter between a few millimeters and several hundred millimeters. Copper has excellent electrical and thermal conductivity. After processing, it is necessary to detect the surface roughness of the copper capillary tube and locally polish the areas with roughness higher than the set value to reduce the roughness. Laser detection of surface roughness is a commonly used non-contact method. Laser detection devices usually use an inclined irradiation method to compare the received intensities of the reflected light and scattered light of the laser beam. If it is mainly reflection, the roughness is low; if it is mainly scattering, the roughness is high.

[0003] In the prior art, due to the limitation of the receiving accuracy of the detector, the size of the laser beam cannot be too small. When laser detecting the roughness of a copper capillary tube with an extremely small diameter, a large proportion of the area of the copper capillary tube may be covered by the laser beam, and the surface roughness of a specific area cannot be accurately measured. Therefore, a high-precision detector needs to be equipped. Since the detector needs to be replaced regularly over time to maintain detection accuracy, the cost of the detection process will be greatly increased. This phenomenon has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a detection device and a detection process for the surface roughness of a copper capillary tube in view of the existing logging equipment, so as to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A detection device and a detection process for the surface roughness of a copper capillary tube, including a lead screw stage one and a lead screw stage two which are movably arranged corresponding to the top of a base. Both the lead screw stage one and the lead screw stage two are driven by motors. A positioning fixture one is installed on one side of the lead screw stage one, and a positioning fixture two is installed on one side of the lead screw stage two. A copper capillary tube is clamped between the positioning fixture one and the positioning fixture two. An installation cover and a receiver are also fixedly installed corresponding to the base. A plurality of laser emitters are evenly distributed in a circumferential manner on one side of the installation cover.

[0006] A detection process for the surface roughness of a copper capillary tube includes the following steps: S1. Install the copper capillary tube between the positioning fixture one 31 and the positioning fixture two 41, drive the lead screw stage one 3 and the lead screw stage two 4 to move, and adjust the axial position of the copper capillary tube so that the laser incident point of the laser emitter 1 is at one end of the copper capillary tube; S2. Activate the top laser emitter 1. At this time, the center of the laser beam is focused on the top of the copper capillary. The laser beam is reflected by the copper capillary and irradiates on the detection surface of the receiver 2 to form a fan-shaped ring, and is scattered by the copper capillary to form a fan-shaped surface on the receiver 2. S3. Obtain the reflection area and scattering area of the laser beam according to the law of light reflection, and process the relationship between the laser intensity received by the receiver 2 and the roughness ; S4. Define the overlapping area range of adjacent irradiation areas according to the number of laser emitters 1 and the irradiation range of the laser beam. S5. Activate each laser emitter 1 in turn, detect the reflected laser intensity and scattered laser intensity on the receiving surface of the receiver 2, and calculate the roughness ; mark the detection area corresponding to the roughness higher than the set value. S6. Translate the copper capillary axially by a certain distance, activate each laser emitter 1 again in turn, mark the detection area corresponding to the roughness higher than the set value again, and determine the axial position of the detection area corresponding to the roughness higher than the set value. S7. After rotating the copper capillary by a certain angle using a fixture, activate each laser emitter 1 again in turn, mark the detection area corresponding to the roughness higher than the set value again, and determine the circumferential position of the detection area corresponding to the roughness higher than the set value. S8. After marking the detection areas with roughness higher than the set value, polish these areas specifically.

[0007] The present invention further explains that in the step S3, the specific method for processing the relationship between the received laser intensity and the roughness is as follows: Let the contour of the laser beam be a square with a side length of , the diameter of the copper capillary be . The laser will be detected on the detection surface of the receiver 2 after reflection and scattering. When the laser is reflected, a normal line is made for the plane where the intersection point of the outermost incident light and the outer wall of the copper capillary is located. The outgoing light will form an annular fan-shaped area with a thickness of on the detection surface of the receiver 2. The scattered light will expand outward on the basis of the annular fan-shaped area until it covers the diameter of the entire receiving surface. Compare the detected infrared light intensity in the annular fan-shaped area with the detected infrared light intensity in the entire receiving surface to obtain the surface roughness of the copper capillary, where is the conversion coefficient between the infrared light intensity ratio and the surface roughness.

[0008] The present invention further illustrates that in step S4, the specific method for delimiting the overlapping area range is as follows: Let the number of laser emitters 1 be , since multiple laser emitters 1 are evenly distributed in a circle, and the central angle between each other is , since the side length of the laser beam is , the central angle covered by the range of the laser beam is , then according to , calculate , the central angle of the overlapping area of adjacent laser beams , since the laser is obliquely irradiated on the copper capillary, let the angle between the laser beam and the vertical perpendicular line be , the axial length of the laser beam on the copper capillary is , then , and then the value of can be calculated. According to and , the overlapping area of adjacent laser beams on the copper capillary can be delimited.

[0009] The present invention further illustrates that in step S5, the specific method for marking the detection area corresponding to the roughness higher than the set value is as follows: When sequentially activating each laser emitter 1 to irradiate the copper capillary, when it is detected that in the detection area covered by the laser beam of a certain laser emitter 1, if the detection areas covered by the laser beams of its two adjacent laser emitters 1 are both , then the of the overlapping area of adjacent laser beams must be less than . By excluding the overlapping area between this laser emitter 1 and other laser emitters 1, mark the non-overlapping area irradiated by this laser emitter 1.

[0010] The present invention further illustrates that in step S6, the specific method for determining the axial position is as follows: S6-1. Let the distance of each axial translation of the copper capillary be . Each translation will reduce a part of the detection area and correspondingly increase a part of the detection area at the other end. When it is detected that in the detection area irradiated by the laser beam of a certain laser emitter 1, if it is detected that the detection area irradiated by the laser beam of this laser emitter 1 after a certain translation, then the laser irradiation area reduced due to this translation is marked as having a roughness higher than the set value; S6-2. When it is detected that , if the detection area irradiated by the laser beam of the laser emitter 1 is detected after a certain translation , the laser irradiation area increased due to this translation is marked as having a roughness higher than the set value.

[0011] The present invention further illustrates that in S7, the central angle by which the copper capillary is rotated each time is , when the detection area irradiated by the laser beam of a certain laser emitter 1 is detected , if the detection area irradiated by the laser beam of this laser emitter 1 is detected after a certain rotation , the laser irradiation area reduced due to this rotation is marked as having a roughness higher than the set value; when the detection area irradiated by the laser beam of a certain laser emitter 1 is detected , if the detection area irradiated by the laser beam of this laser emitter 1 is detected after a certain rotation , the laser irradiation area increased due to this rotation is marked as having a roughness higher than the set value.

[0012] The present invention further illustrates that in S7, after multiple rotations and translations, the finally determined detection areas with roughness higher than the set value are arc-shaped surface areas with a central angle of , and a side length of formed along the outer wall of the copper capillary and having characteristics, and these arc-shaped surface areas are polished.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention improves the traditional laser detection device, adopts a method of circularly arranging multiple laser emitters to comprehensively measure the roughness of the copper capillary from multiple angles, calculates the received intensity that the detector should detect, uses the exclusion method to calculate which areas have a roughness higher than the set value based on the overlapping detection areas, then adjusts the axial position of the copper capillary and continuously observes the change in the received intensity, and further determines the axial position with a roughness higher than the set value according to the change in the received intensity, so as to determine the area of the copper capillary that needs local polishing; This method can still detect the roughness and determine the specific position with high roughness even when the diameter of the laser beam is higher than the diameter of the copper capillary. The detection is accurate and the cost is low. It can perform targeted polishing on the areas where the roughness is detected to be higher than the set value, preventing the problem of wall thickness reduction caused by polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic side view of the measurement principle of the present invention; Figure 3 It is a schematic diagram of the scattering area of the receiver of the present invention; Figure 4 It is a schematic diagram of the detection range of the laser emitter of the present invention; Figure 5 It is a schematic diagram of the axial position adjustment of the present invention; In the figure: 1. Laser emitter; 2. Receiver; 11. Mounting cover; 3. First lead screw slide; 31. First positioning fixture; 4. Second lead screw slide; 41. Second positioning fixture; 5. Base. Specific embodiments

[0015] The technical solution of the present invention will be further described in detail and non - restrictively below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0016] Please refer to Figures 1-5 , the present invention provides a technical solution: A detection device and detection process for the surface roughness of copper capillary tubes, including a base 5, characterized in that: A first lead screw slide 3 and a second lead screw slide 4 are movably arranged corresponding to the top of the base 5, both the first lead screw slide 3 and the second lead screw slide 4 are driven by motors, a first positioning fixture 31 is installed on one side of the first lead screw slide 3, a second positioning fixture 41 is installed on one side of the second lead screw slide 4, a copper capillary tube is clamped between the first positioning fixture 31 and the second positioning fixture 41, an installation cover 11 and a receiver 2 are also fixedly installed corresponding to the base 5, and a plurality of laser emitters 1 are evenly distributed in a circular pattern on one side of the installation cover 11; A detection process for the surface roughness of copper capillary tubes includes the following steps: S1. Install the copper capillary tube between the first positioning fixture 31 and the second positioning fixture 41, drive the first lead screw slide 3 and the second lead screw slide 4 to move, and adjust the axial position of the copper capillary tube so that the laser incident point of the laser emitter 1 is at one end of the copper capillary tube; S2. Start the top - most laser emitter 1. At this time, the center of the laser beam is focused on the top - most part of the copper capillary tube. The laser beam is reflected by the copper capillary tube and irradiates on the detection surface of the receiver 2 to form a fan - shaped ring, and is scattered by the copper capillary tube to form a fan - shaped surface on the receiver 2; S3. According to the law of light reflection, obtain the reflection area and scattering area of the laser beam, and measure the laser intensity received by the receiver 2 and the roughness Process the relationship; S4. Define the overlapping area range of adjacent irradiation areas according to the number of laser emitters 1 and the irradiation range of the laser beam; S5. Start each laser emitter 1 in sequence, detect the reflected laser intensity and scattered laser intensity on the receiving surface of the receiver 2, and calculate the roughness And mark the detection area corresponding to the roughness higher than the set value ; S6. Translate the copper capillary axially by a certain distance, restart each laser emitter 1 in sequence again, mark the detection area corresponding to the roughness higher than the set value again, and determine the axial position of the detection area corresponding to the roughness higher than the set value; S7. After rotating the copper capillary by a certain angle using the fixture, restart each laser emitter 1 in sequence again, mark the detection area corresponding to the roughness higher than the set value again, and determine the circumferential position of the detection area corresponding to the roughness higher than the set value; S8. After marking the detection areas with roughness higher than the set value, perform targeted polishing on these areas; In S3, the specific method for processing the relationship between the received laser intensity and the roughness is: Let the contour of the laser beam be a square with a side length of , the diameter of the copper capillary is , the laser will be detected on the detection surface of the receiver 2 after reflection and scattering. When the laser is reflected, the plane where the intersection point of the outermost incident ray and the outer wall of the copper capillary makes a normal line. The outgoing ray will form an annular sector area with a thickness of on the detection surface of the receiver 2. The scattered light will expand outward on the basis of the annular sector area until it covers the diameter of the entire receiving surface. Compare the infrared light intensity detected in the annular sector area with the infrared light intensity detected in the entire receiving surface to obtain the surface roughness of the copper capillary, where is the conversion coefficient between the infrared light intensity ratio and the surface roughness; In S4, the specific method for defining the overlapping area range is: Let the number of laser emitters 1 be . Since multiple laser emitters 1 are evenly distributed in a circle and the central angle between them is , and since the side length of the laser beam is , the central angle covered by the range of the laser beam is , then according to find , the central angle of the overlapping area of adjacent laser beams , since the laser is obliquely irradiated onto the copper capillary, let the angle between the laser beam and the vertical perpendicular line be , and the axial length of the laser beam on the copper capillary is , then , the value of can be obtained. According to and , the overlapping area of adjacent laser beams on the copper capillary can be delimited; In S5, the specific method for marking the detection area corresponding to the roughness higher than the set value is as follows: When successively activating each laser emitter 1 to irradiate the copper capillary, when the detection area covered by the laser beam of a certain laser emitter 1 detects , if the detection areas covered by the laser beams of its two adjacent laser emitters 1 are both , then the of the overlapping area of adjacent laser beams must be less than . By excluding the overlapping area between this laser emitter 1 and other laser emitters 1, the non-overlapping area irradiated by this laser emitter 1 is marked; In S6, the specific method for determining the axial position is as follows: S6-1. Let the distance of each axial translation of the copper capillary be . Each translation will reduce a part of the detection area and correspondingly increase a part of the detection area at the other end. When the detection area irradiated by the laser beam of a certain laser emitter 1 detects , if after a certain translation, it is detected that the detection area irradiated by the laser beam of this laser emitter 1 is , then the laser irradiation area reduced due to this translation is marked as having a roughness higher than the set value; S6-2. When the detection area irradiated by the laser beam of a certain laser emitter 1 detects , if after a certain translation, it is detected that the detection area irradiated by the laser beam of this laser emitter 1 is , then the laser irradiation area increased due to this translation is marked as having a roughness higher than the set value; In S7, let the central angle of each rotation of the copper capillary be . When the detection area irradiated by the laser beam of a certain laser emitter 1 detects , if after a certain rotation, it is detected that the detection area irradiated by the laser beam of this laser emitter 1 is , then the laser irradiation area reduced due to this rotation is marked as having a roughness higher than the set value; When the detection area irradiated by the laser beam of a certain laser emitter 1 detects , if after a certain rotation, it is detected that the detection area irradiated by the laser beam of this laser emitter 1 is The laser irradiation area increased due to this rotation is marked as having a roughness higher than the set value; In S7, after multiple rotations and translations, the finally determined detection area with a roughness higher than the set value is a central angle of and a side length of a plurality of arc surface areas formed along the outer wall of the copper capillary tube, each having the characteristics, and these arc surface areas are polished.

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0018] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit 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 they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection device for the surface roughness of red copper capillary tubes, comprising a base (5), characterized in that: A lead screw slide table 1 (3) and a lead screw slide table 2 (4) are movably arranged corresponding to the top of the base (5). The lead screw slide table 1 (3) and the lead screw slide table 2 (4) are both driven by motors. A positioning fixture 1 (31) is installed on one side of the lead screw slide table 1 (3), and a positioning fixture 2 (41) is installed on one side of the lead screw slide table 2 (4). A copper capillary tube is clamped between the positioning fixture 1 (31) and the positioning fixture 2 (41). An installation cover (11) and a receiver (2) are also fixedly installed corresponding to the base (5). A plurality of laser emitters (1) are evenly distributed in a circumferential manner on one side of the installation cover (11).

2. A detection process for the surface roughness of red copper capillary tubes, characterized in that: It includes the following steps: S1. Install the copper capillary tube between the positioning fixture 1 (31) and the positioning fixture 2 (41), drive the lead screw slide table 1 (3) and the lead screw slide table 2 (4) to move, and adjust the axial position of the copper capillary tube so that the laser incident point of the laser emitter (1) is at one end of the copper capillary tube; S2. Start the uppermost laser emitter (1). At this time, the center of the laser beam is focused on the uppermost part of the copper capillary tube. The laser beam is reflected by the copper capillary tube and irradiates on the detection surface of the receiver (2) to form a fan-shaped ring, and a fan-shaped surface is formed on the receiver (2) through the scattering of the copper capillary tube; S3. Obtain the reflection area and scattering area of the laser beam according to the law of light reflection, and process the relationship between the laser intensity received by the receiver (2) and the roughness thereof; S4. According to the number of laser emitters (1) and the irradiation range of the laser beam, delimit the overlapping area range of adjacent irradiation areas; S5. Start each laser emitter (1) in sequence, detect the reflected laser intensity and scattered laser intensity in the receiving surface of the receiver (2), and calculate the roughness and mark the detection area corresponding to the roughness higher than the set value. ​ S6. Translate the copper capillary tube axially by a certain distance, restart each laser emitter (1) in sequence again, mark the detection area corresponding to the roughness higher than the set value again, and determine the axial position of the detection area corresponding to the roughness higher than the set value; S7. After rotating the copper capillary tube by a certain angle using the fixture, restart each laser emitter (1) in sequence again, mark the detection area corresponding to the roughness higher than the set value again, and determine the circumferential position of the detection area corresponding to the roughness higher than the set value; S8. After marking the detection areas with roughness higher than the set value, polish these areas specifically.

3. The detection process for the surface roughness of copper capillary tubes according to claim 2, wherein: In step S3, the specific method for processing the relationship between the received laser intensity and the roughness is: Let the profile of the laser beam be a square with side length . The diameter of the copper capillary is . After reflection and scattering, the laser will be detected on the detection surface of the receiver (2). When the laser is reflected, a normal line is drawn on the plane where the intersection point of the outermost incident light ray and the outer wall of the copper capillary is located. The outgoing light ray will form an annular sector region with a thickness of on the detection surface of the receiver (2). The scattered light rays will expand outward based on the annular sector region until they cover the diameter of the entire receiving surface. By comparing the infrared light intensity detected within the annular sector region with the infrared light intensity detected within the entire receiving surface, the surface roughness of the copper capillary is obtained, where is the conversion coefficient between the infrared light intensity ratio and the surface roughness.

4. A detection process for the surface roughness of red copper capillary tubes according to claim 3, characterized in that: In step S4, the specific method for delimiting the overlapping area range is: Let the number of laser emitters (1) be , since multiple laser emitters (1) are evenly distributed in a circle, and the central angle between each other is , since the side length of the laser beam is , the central angle covered by the range of the laser beam is , then according to find out , the central angle of the overlapping region of adjacent laser beams. Since the laser is obliquely irradiated on the copper capillary, let the angle between the laser beam and the vertical perpendicular be , and the axial length of the laser beam on the copper capillary is , then , and the value of can be found out. According to and , the overlapping region of adjacent laser beams on the copper capillary can be delimited.

5. The detection process for the surface roughness of a copper capillary tube according to claim 4, characterized in that: In S5, the detection area corresponding to the surface roughness higher than the set value is marked The specific method is as follows: when irradiating the copper capillary tube by successively activating each laser emitter (1), if the detection area covered by the laser beam of a certain laser emitter (1) is detected while the detection areas covered by the laser beams of its two adjacent laser emitters (1) are both , then the overlapping area of the adjacent laser beams must be less than . By excluding the overlapping area between this laser emitter (1) and other laser emitters (1), the non-overlapping area irradiated by this laser emitter (1) is marked.

6. The detection process for the surface roughness of a red copper capillary tube according to claim 5, characterized in that: In step S6, the specific method for determining the axial position is: S6-1. Let the distance of each axial translation of the copper capillary be , and each translation will reduce a part of the detection area and correspondingly increase a part of the detection area at the other end. When it is detected that in the detection area irradiated by the laser beam of a certain laser emitter (1), if it is detected that the detection area irradiated by the laser beam of this laser emitter (1) after a certain translation , then the laser irradiation area reduced due to this translation is marked as having a roughness higher than the set value; S6-2. When it is detected in the detection area irradiated by the laser beam of a certain laser emitter (1) , if it is detected in the detection area irradiated by the laser beam of this laser emitter (1) after a certain translation , the laser irradiation area increased due to this translation is marked as having a roughness higher than the set value.

7. A detection process for the surface roughness of copper capillary tubes according to claim 6, characterized in that: In the S7, let the central angle by which the copper capillary tube rotates each time be . When a detection area irradiated by the laser beam of a certain laser emitter (1) detects , if the detection area irradiated by the laser beam of this laser emitter (1) is detected after a certain rotation , then the laser irradiation area reduced due to this rotation is marked as having a roughness higher than the set value; when a detection area irradiated by the laser beam of a certain laser emitter (1) detects , if the detection area irradiated by the laser beam of this laser emitter (1) is detected after a certain rotation , then the laser irradiation area increased due to this rotation is marked as having a roughness higher than the set value.

8. A detection process for the surface roughness of red copper capillary tubes according to claim 7, characterized in that: In the S7, after multiple rotations and translations, the finally determined detection area with a roughness higher than the set value is a central angle of , and the side length is . A plurality of arc-shaped surface areas with characteristics are formed along the outer wall of the copper capillary tube, and these arc-shaped surface areas are polished.

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