Machining device suitable for induction brazing of electromagnetic relay shell set and operation method

Abstract

The invention discloses a machining device suitable for induction brazing of an electromagnetic relay shell set and an operation method, and relates to the technical field of relay shell set machining. The machining device comprises a feeding mechanism, a positioning mechanism, a detecting mechanism, a pressing mechanism and a brazing heating mechanism; wherein the feeding mechanism is used for grabbing a to-be-brazed shell group onto a heating seat of the brazing heating mechanism; the positioning mechanism is used for pushing the to-be-brazed shell group to a target positioning point on the heating seat; the detection mechanism is used for acquiring a working part image of the pressing head of the pressing mechanism and identifying the oxidation degree of the pressing head based on the working part image; and the pressing mechanism is used for pressing the to-be-brazed shell set to the target positioning point through a pressing head so that the heating coil of the brazing heating mechanism can conduct welding operation. The technical problems that according to a resistance brazing manual operation mode, the production efficiency is low, and when the brazing temperature is uneven, local areas are prone to being seriously oxidized, ablated and deformed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of relay housing assembly processing, in particular to a processing device and an operating method suitable for induction brazing of an electromagnetic relay housing assembly. Background Art

[0002] Military micro relays are widely used in the aerospace field due to their small size, low energy consumption, stable and reliable performance, etc. The outer shell of this type of product is the outer shell assembly. The relay outer shell assembly is composed of a metal outer shell and a mounting ear assembly, and the outer shell material and the mounting ear material are white copper. After the outer shell assembly is encapsulated with the entire shell, the inner cavity of the electromagnetic relay forms a closed environment to avoid the intrusion of harmful gases such as water vapor and oxygen in the external environment, ensuring the stability of the electromagnetic relay parameters and the reliability of its operation.

[0003] The current shell assembly welding process is a manual resistance brazing operation mode, that is, the mounting ears are first spot welded to the shell, and then manual brazing is performed. Although the manual resistance brazing operation mode has the characteristics of strong adaptability and flexible product switching, it requires high operator skill levels, product quality consistency is greatly affected by human factors, and high heat can cause personal injury. At the same time, the resistance brazing operation process is cumbersome, and the graphite electrode is easily worn during the brazing process, requiring frequent electrode filing, low production efficiency, and seriously affecting the improvement of the production capacity of the relay shell assembly.

[0004] In practical applications, due to the thin wall of the relay housing assembly, when the brazing temperature is uneven, it is easy to cause severe oxidation, ablation, and deformation in some areas. Therefore, ensuring uniform temperature of the welding surface during the brazing process of the housing assembly is the key to obtaining excellent brazing quality. After research, it was found that the end of the pressure head will form black oxide after high temperature oxidation, and excessive accumulation of oxide will cause uneven temperature of the welding surface during the brazing process. Summary of the invention

[0005] The purpose of the present invention is to provide a processing device and operating method suitable for induction brazing of an electromagnetic relay housing assembly in order to solve at least one of the above technical problems.

[0006] In a first aspect, an embodiment of the present invention provides a processing device suitable for induction brazing of an electromagnetic relay housing group, including: a loading mechanism, a positioning mechanism, a detection mechanism, a pressing mechanism, and a brazing heating mechanism; wherein, the loading mechanism is used to grab the housing group to be brazed onto the heating seat of the brazing heating mechanism; the housing group to be brazed is an electromagnetic relay housing group with spot-welded mounting ears; the positioning mechanism is used to push the housing group to be brazed to a target positioning point on the heating seat; the detection mechanism is used to obtain an image of the working part of the indenter of the pressing mechanism and identify the oxidation degree of the indenter based on the working part image; the pressing mechanism is used to press the housing group to be brazed at the target positioning point through the indenter, so that the heating coil of the brazing heating mechanism performs welding operations.

[0007] Further, the loading mechanism includes a manipulator, a rotary cylinder, and a gripper; wherein, the rotary cylinder is arranged at the end of the manipulator, and the gripper is arranged at the end of the rotary cylinder; the gripper is used to grab the housing group to be brazed; the rotary cylinder is used to drive the gripper to rotate, so as to drive the housing group to be brazed to flip; the manipulator is used to drive the housing group to be brazed to move from the material taking point to the heating seat.

[0008] Further, the gripper includes a heat-resistant ceramic gripper.

[0009] Further, the positioning mechanism includes an adjustment base arranged in front of the brazing heating mechanism, a linear cylinder is arranged on the adjustment base, and a positioning push plate is arranged at the end of the linear cylinder push rod; the adjustment base is used to adjust the position of the linear cylinder in the horizontal direction; the linear cylinder is used to drive the positioning push plate to perform linear motion; the positioning push plate is used to push the housing group to be brazed to move.

[0010] Further, a card slot is arranged at the front end of the positioning push plate. When the positioning push plate pushes the housing to be brazed, the card slot is stuck on the edge of the housing group to be brazed.

[0011] Further, the detection mechanism includes a horizontal slide table, a first connecting plate is slidably arranged on the horizontal slide table, and an industrial camera is arranged above the end of the first connecting plate; the industrial camera is a camera with an internal light source; the lens of the industrial camera is arranged upward; the horizontal slide table is used to send the lens of the industrial camera to directly below the indenter by driving the first connecting plate before brazing the housing group to be brazed, so that the industrial camera can obtain an image of the working part of the indenter.

[0012] Further, the pressing mechanism includes a vertical slide table, a second connecting plate is slidably arranged on the vertical slide table, and the indenter is arranged at the end of the second connecting plate.

[0013] Further, the material of the indenter includes titanium alloy; a heat-resistant ceramic connector is also arranged between the second connecting plate and the indenter.

[0014] In a second aspect, an operation method of a processing device applicable to induction brazing of an electromagnetic relay housing group is further provided by an embodiment of the present invention, including: controlling the feeding mechanism to grab the housing group to be brazed onto the heating seat of the brazing heating mechanism; controlling the positioning mechanism to push the housing group to be brazed to a target positioning point on the heating seat; controlling the detection mechanism to obtain an image of the working part of the indenter of the pressing mechanism, and identifying the oxidation degree of the indenter based on the image of the working part to obtain an oxidation degree evaluation result; the oxidation degree evaluation result includes qualified oxidation degree and unqualified oxidation degree; if the oxidation degree evaluation result is qualified oxidation degree, controlling the indenter of the pressing mechanism to press the housing group to be brazed at the target positioning point, so that the heating coil of the brazing heating mechanism performs welding operation.

[0015] Further, identifying the oxidation degree of the indenter based on the image of the working part includes: performing binarization and noise reduction processing on the image of the working part to obtain a binarized image; enhancing the regional features of the binarized image and detecting the contours in the binarized image to obtain a target oxidation region image; performing matching in a preset feature library based on the area and shape of the target oxidation region image to obtain the oxidation degree evaluation result of the indenter.

[0016] The present invention provides a processing device and an operation method applicable to induction brazing of an electromagnetic relay housing group, which can realize automatic feeding, automatic positioning and automatic brazing processing of the electromagnetic relay housing group, and can monitor the oxidation degree of the indenter in real time through the detection mechanism, prevent the occurrence of uneven temperature on the welding surface, and alleviate the technical problems of low production efficiency and serious local oxidation, ablation and deformation easily occurring when the resistance brazing manual operation mode has uneven brazing temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific embodiments or the description of the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a processing device applicable to induction brazing of an electromagnetic relay housing group provided by an embodiment of the present invention;

[0019] Figure 2 Schematic three-dimensional structure diagram of a shell group to be brazed provided by an embodiment of the present invention;

[0020] Figure 3 Partial enlarged view of a welding part provided by an embodiment of the present invention;

[0021] Figure 4 Schematic structure diagram of a loading mechanism provided by an embodiment of the present invention;

[0022] Figure 5 Schematic three-dimensional diagram of a positioning mechanism provided by an embodiment of the present invention;

[0023] Figure 6 Schematic structure diagram of a detection mechanism provided by an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the state of an industrial camera collecting an image of the working part of a pressing head provided by an embodiment of the present invention;

[0025] Figure 8 Schematic structure diagram of a pressing mechanism provided by an embodiment of the present invention;

[0026] Figure 9 Flow chart of an operation method of a processing device suitable for induction brazing of an electromagnetic relay shell group provided by an embodiment of the present invention;

[0027] Figure 10 Schematic diagram of a man-machine interface for identifying the oxidation degree of a pressing head provided by an embodiment of the present invention.

[0028] In the figure: 10. Loading mechanism, 11. Manipulator, 12. Rotary cylinder, 13. Claw, 20. Positioning mechanism, 21. Adjusting base, 22. Linear cylinder, 23. Positioning push plate, 30. Detection mechanism, 31. Horizontal slide, 32. First connecting plate, 33. Industrial camera, 40. Pressing mechanism, 41. Pressing head, 42. Vertical slide, 43. Second connecting plate, 44. Heat-resistant ceramic connecting piece, 50. Brazing heating mechanism, 51. Heating base, 52. Heating coil, 60. Shell group to be brazed, 61. Shell, 62. Mounting ear. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Figure 1It is a schematic structural diagram of a processing device applicable to induction brazing of an electromagnetic relay housing group according to an embodiment of the present invention. As Figure 1 shown, it includes: a loading mechanism 10, a positioning mechanism 20, a detection mechanism 30, a pressing mechanism 40, and a brazing heating mechanism 50.

[0031] Specifically, the loading mechanism 10 is used to grasp the housing group 60 to be brazed onto the heating seat 51 of the brazing heating mechanism 50. Among them, the housing group 60 to be brazed is an electromagnetic relay housing group with spot-welded mounting ears, specifically as Figure 2 shown, the housing group 60 to be brazed includes a housing 61 and mounting ears 62 fixed to both sides of the housing 61; the mounting ears 62 are fixed to the housing 61 by brazing.

[0032] The positioning mechanism 20 is used to push the housing group 60 to be brazed to the target positioning point on the heating seat 51.

[0033] The detection mechanism 30 is used to obtain an image of the working part of the indenter 41 of the pressing mechanism 40 and identify the oxidation degree of the indenter 41 based on the working part image.

[0034] Figure 3 It is a partial enlarged view of a welding part according to an embodiment of the present invention. As Figure 3 shown, the pressing mechanism 40 is used to press the housing group 60 to be brazed at the target positioning point by the indenter 41, so that the heating coil 52 of the brazing heating mechanism 50 performs welding operations.

[0035] Specifically, the loading mechanism 10 is further used to take out the housing group 60 with one side of the mounting ear welded, rotate it 180°, and then put it back to the target positioning point to perform brazing operations on the other side of the mounting ear.

[0036] Figure 4 It is a schematic structural diagram of a loading mechanism according to an embodiment of the present invention. As Figure 4 shown, the loading mechanism 10 includes a manipulator 11, a rotary cylinder 12, and a gripper 13; among them, the rotary cylinder 12 is arranged at the end of the manipulator 11, and the gripper 13 is arranged at the end of the rotary cylinder 12.

[0037] Specifically, the gripper 13 is used to grasp the housing group 60 to be brazed;

[0038] The rotary cylinder 12 is used to drive the gripper 13 to rotate, so as to drive the housing group 60 to be brazed to flip;

[0039] The manipulator 11 is used to drive the housing group 60 to be brazed to move from the material taking point to the heating seat 51.

[0040] Specifically, the manipulator 11 performs automatic loading and unloading of the housing group according to a pre-set trajectory code. The use of the manipulator 11 can meet the grasping requirements of the equipment for different types of housing groups. The rotary cylinder 12 can flip the housing group to realize welding on both sides of the housing group.

[0041] Preferably, the jaw 13 includes a heat-resistant ceramic jaw.

[0042] In the embodiment of the present invention, since the temperature of the housing group 60 is relatively high when the jaw 13 at the end of the manipulator 11 grasps the housing group to be brazed for the second time, it may affect the jaw 13. Therefore, the material of the jaw 13 is selected as a heat-resistant ceramic jaw.

[0043] Figure 5 It is a three-dimensional schematic diagram of a positioning mechanism provided according to an embodiment of the present invention. As Figure 5 shown, the positioning mechanism 20 includes an adjustment base 21 arranged in front of the brazing heating mechanism 50. A linear cylinder 22 is arranged on the adjustment base 21, and a positioning push plate 23 is arranged at the end of the push rod of the linear cylinder 22.

[0044] Specifically, the adjustment base 21 is used to adjust the position of the linear cylinder 22 in the horizontal direction;

[0045] Preferably, the adjustment base 21 can be manually fine-tuned in the XY direction to meet the requirements of production flexibility.

[0046] The linear cylinder 22 is used to drive the positioning push plate 23 to perform a linear motion.

[0047] The positioning push plate 23 is used to push the housing group 60 to be brazed to move.

[0048] Specifically, as Figure 5 shown, a card slot is arranged at the front end of the positioning push plate 23. When the positioning push plate 23 pushes the housing 60 to be brazed, the card slot is stuck on the edge of the housing group 60 to be brazed.

[0049] Specifically, the positioning push plate 23 is connected to the push rod of the linear cylinder 22, and the positioning push plate 23 moves with the linear cylinder 22 to hold a corner of the housing group 60 to be brazed to achieve positioning.

[0050] Preferably, the material of the positioning push plate 23 is high-temperature resistant bakelite to avoid the influence of high heat on the service life of the positioning push plate 23.

[0051] Figure 6 It is a structural schematic diagram of a detection mechanism provided according to an embodiment of the present invention. As Figure 6As shown, the detection mechanism 30 includes a horizontal sliding table 31. A first connecting plate 32 is slidably arranged on the horizontal sliding table 31, and an industrial camera 33 is arranged above the end of the first connecting plate 32. The industrial camera 33 is a camera with a built-in light source, and the lens of the industrial camera 33 is arranged upward.

[0052] Figure 7 It is a schematic diagram of the state of the industrial camera collecting the image of the working part of the indenter according to the embodiment of the present invention. As Figure 7 shown, the horizontal sliding table 31 is used to send the lens of the industrial camera 33 to directly below the indenter 41 by driving the first connecting plate 32 before brazing the shell group 60 to be brazed, so that the industrial camera 33 can obtain the image of the working part of the indenter 41.

[0053] Specifically, the function of the detection mechanism 30 is to ensure that when the indenter 41 is excessively oxidized, it can be discovered in time to avoid quality problems in the welding of the shell group.

[0054] Figure 8 It is a schematic structural diagram of a pressing mechanism according to the embodiment of the present invention. As Figure 8 shown, the pressing mechanism 40 includes a vertical sliding table 42. A second connecting plate 43 is slidably arranged on the vertical sliding table 42, and an indenter 41 is arranged at the end of the second connecting plate 43.

[0055] The pressing mechanism 40 provided by the embodiment of the present invention can not only ensure that the geometric tolerance of the mounting ear 62 on the shell 61 meets the process requirements, but also ensure the uniformity of the brazing action in the welding area.

[0056] The indenter 41 is an execution fitting of the pressing mechanism 40 on the mounting ear of the shell group. Preferably, the material of the indenter 41 includes titanium alloy.

[0057] In order to reduce the influence of the high temperature generated by the brazing coil of the welder during pressing on the pressing mechanism 40, preferably, a heat-resistant ceramic connecting piece 44 is also arranged between the second connecting plate 43 and the indenter 41.

[0058] Figure 9 It is a flowchart of an operation method of a processing device suitable for induction brazing of an electromagnetic relay shell group according to the embodiment of the present invention. As Figure 9 shown, the method specifically includes the following steps:

[0059] Step S902, controlling the feeding mechanism to grab the shell group to be brazed onto the heating seat of the brazing heating mechanism.

[0060] Step S904, controlling the positioning mechanism to push the shell group to be brazed on the heating seat to the target positioning point.

[0061] Step S906: Control the detection mechanism to obtain an image of the working part of the indenter of the pressing mechanism, and identify the oxidation degree of the indenter based on the image of the working part to obtain an oxidation degree evaluation result; the oxidation degree evaluation result includes qualified oxidation degree and unqualified oxidation degree.

[0062] Step S908: If the oxidation degree evaluation result is qualified oxidation degree, control the indenter of the pressing mechanism to press the shell group to be brazed at the target positioning point so that the heating coil of the brazing heating mechanism performs welding operations.

[0063] Optionally, if the oxidation degree evaluation result is unqualified oxidation degree, stop subsequent operations and send an alarm signal.

[0064] Specifically, in step S906, identifying the oxidation degree of the indenter based on the image of the working part further includes the following steps:

[0065] Step S9061: Perform binarization and noise reduction processing on the image of the working part to obtain a binarized image.

[0066] Step S9062: Enhance the regional features of the binarized image and detect the contours in the binarized image to obtain a target oxidation region image.

[0067] Step S9063: Based on the area and shape of the target oxidation region image, perform matching in a preset feature library to obtain the oxidation degree evaluation result of the indenter.

[0068] In an optional implementation manner provided by the embodiment of the present invention, the oxidation degree recognition process of the indenter can be implemented using the OPENCV library C++. Specifically as follows:

[0069] First, use cv.imread() to read the image to be detected, convert the image to grayscale using cv2.cvtcolor, then use cv2.gaussianblur() Gaussian filter to remove the noise in the image, and then use cv2.threshold() to convert the image into a binarized image.

[0070] Use cv2.erode() for erosion and cv2.dilate() for dilation to enhance the features of the oxidation region, and then use the cv2.findcontours() function to detect the contours in the image to generate the correct oxidation contour area.

[0071] Calculate the oxidation region area, compare and screen the features such as the area and shape of the returned contours with the pre-trained feature library. After obtaining a preliminary conclusion, further analyze the features such as the shape and color depth of the oxidation region, and finally give a judgment on the oxidation degree of the indenter.

[0072] Figure 10It is a schematic diagram of a human-machine interface for identifying the oxidation degree of a punch according to an embodiment of the present invention. As Figure 10 shown, the human-machine interface consists of three parts: area A, area B, and area C. Area A is the identification parameter setting area, area B is the pattern display for each step of identification, and area C is the result display area.

[0073] From the above description, it can be seen that the present invention provides a processing device and an operation method applicable to induction brazing of an electromagnetic relay housing group, which can realize automatic feeding, automatic positioning, and automatic brazing processing of the electromagnetic relay housing group. Moreover, through the detection mechanism, the oxidation degree of the punch can be monitored in real time to prevent the occurrence of uneven temperature on the welding surface, alleviating the technical problems of low production efficiency and severe oxidation, ablation, and deformation in local areas easily occurring when the resistance brazing manual operation mode has uneven brazing temperature.

[0074] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0075] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A processing device applicable to induction brazing of an electromagnetic relay housing group, characterized in that, Including: A loading mechanism, a positioning mechanism, a detection mechanism, a pressing mechanism and a brazing heating mechanism; among them, The loading mechanism is used to grab the shell group to be brazed onto the heating seat of the brazing heating mechanism; the shell group to be brazed is an electromagnetic relay shell group with spot-welded mounting ears; The positioning mechanism is used to push the shell group to be brazed to the target positioning point on the heating seat; The detection mechanism is used to obtain the working part image of the indenter of the pressing mechanism and identify the oxidation degree of the indenter based on the working part image; The pressing mechanism is used to press the shell group to be brazed at the target positioning point through the indenter, so that the heating coil of the brazing heating mechanism performs welding operations.

2. The processing device applicable to induction brazing of the electromagnetic relay housing group according to claim 1, characterized in that: The loading mechanism includes a manipulator, a rotary cylinder and a gripper; among them, the rotary cylinder is arranged at the end of the manipulator, and the gripper is arranged at the end of the rotary cylinder; The gripper is used to grab the shell group to be brazed; The rotary cylinder is used to drive the gripper to rotate, so as to drive the shell group to be brazed to flip; The manipulator is used to drive the shell group to be brazed to move from the material taking point to the heating seat.

3. The processing device applicable to induction brazing of an electromagnetic relay housing group according to claim 2, characterized in that: The gripper includes a heat-resistant ceramic gripper.

4. The processing device applicable to induction brazing of the electromagnetic relay housing group according to claim 1, characterized in that: The positioning mechanism includes an adjustment base arranged in front of the brazing heating mechanism, a linear cylinder is arranged on the adjustment base, and a positioning push plate is arranged at the end of the linear cylinder push rod; The adjustment base is used to adjust the position of the linear cylinder in the horizontal direction; The linear cylinder is used to drive the positioning push plate to perform a linear motion; The positioning push plate is used to push the shell group to be brazed to move.

5. The processing device applicable to induction brazing of an electromagnetic relay housing group according to claim 4, wherein: A card slot is arranged at the front end of the positioning push plate. When the positioning push plate pushes the shell to be brazed, the card slot is stuck on the edge of the shell group to be brazed.

6. The processing device applicable to induction brazing of the electromagnetic relay housing group according to claim 1, wherein: The detection mechanism includes a horizontal sliding table, a first connecting plate is slidably arranged on the horizontal sliding table, and an industrial camera is arranged above the end of the first connecting plate; the industrial camera is a camera with a built-in light source; the lens of the industrial camera is arranged upward; The horizontal sliding table is used to send the lens of the industrial camera to directly below the indenter by driving the first connecting plate before brazing the shell group to be brazed, so that the industrial camera obtains the working part image of the indenter.

7. The processing device applicable to induction brazing of the electromagnetic relay housing group according to claim 1, characterized in that: The pressing mechanism includes a vertical sliding table, a second connecting plate is slidably arranged on the vertical sliding table, and the indenter is arranged at the end of the second connecting plate.

8. The processing device applicable to induction brazing of the electromagnetic relay housing group according to claim 7, characterized in that: The material of the indenter includes titanium alloy; A heat-resistant ceramic connecting piece is also arranged between the second connecting plate and the indenter.

9. A method for operating a processing device for induction brazing of an electromagnetic relay housing group according to any one of claims 1-8, characterized in that, Including: Controlling the loading mechanism to grab the shell group to be brazed onto the heating seat of the brazing heating mechanism; Controlling the positioning mechanism to push the shell group to be brazed to the target positioning point on the heating seat; Controlling the detection mechanism to obtain the working part image of the indenter of the pressing mechanism and identify the oxidation degree of the indenter based on the working part image to obtain an oxidation degree evaluation result; the oxidation degree evaluation result includes qualified oxidation degree and unqualified oxidation degree; If the evaluation result of the oxidation degree is qualified, control the pressing mechanism to press the pressing head on the brazing position of the shell group to be brazed, so that the heating coil of the brazing heating mechanism performs the welding operation.

10. The method according to claim 9, wherein: Identifying the oxidation degree of the pressing head based on the working part image includes: Performing binarization and noise reduction processing on the working part image to obtain a binarized image; Enhancing the regional features of the binarized image and detecting the contours in the binarized image to obtain a target oxidation region image; Based on the area and shape of the target oxidation region image, perform matching in a preset feature library to obtain the evaluation result of the oxidation degree of the pressing head.

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