A riveting assembly tool and assembly method for a split-type header of an automobile evaporator

Abstract

The invention proposes a riveting assembly tool and an assembly method for a split collector of an automobile evaporator, which belongs to the field of automobile processing. The assembly tool comprises a fixed table, a support frame, a pneumatic drive component, an upper die and a lower die. The pneumatic drive component controls the movement of the upper die through a telescopic rod, so that the upper die and the lower die clamp the collector and use the movable die of the upper die to bend and press the buckle teeth on the collector, so as to complete the riveting of the split collector of the automobile evaporator at one time; the assembly method comprises the steps of placing a cover plate and a main board, positioning the split collector of the automobile evaporator, bending the buckle teeth, pressing the buckle teeth and resetting, and a plurality of buckle teeth are bent and pressed at the same time by a plurality of bending teeth on the movable die, and the riveting of a section of the collector can be completed by one processing cycle of the assembly tool, which significantly improves the production efficiency and shortens the production cycle; in addition, precise positioning technology and pressure control algorithm are adopted to ensure the reliability and sealing of the riveting.

Description

Technical Field

[0001] The invention relates to the field of automobile processing, and in particular to a riveting assembly tool and an assembly method for a split-type header of an automobile evaporator. Background Art

[0002] The split manifold of the automobile evaporator is mainly responsible for the distribution and collection of refrigerant in the air-conditioning system. The manifold is usually composed of an upper cover plate and a lower main board, which are riveted together by multiple buckle teeth to ensure the uniform flow of refrigerant and improve the heat exchange efficiency. At present, the riveting assembly process of the split manifold of the automobile evaporator mainly relies on the manual pressing method. Workers manually bend and press the buckle teeth one by one. The applied pressure depends entirely on the workers' experience and subjective judgment, which can easily lead to uneven pressure at the riveting point, resulting in loose riveting or over-pressing, affecting the reliability of the connection; in the assembly process of the upper cover plate and the lower main board, workers mainly rely on the naked eye for observation and alignment, lack of precise alignment tools and methods, which can easily lead to inaccurate assembly, thus affecting the sealing, which may cause refrigerant leakage and a high rework rate; secondly, the manual operation method limits production efficiency, especially in large-scale production, which is difficult to meet the needs of rapid production.

[0003] Therefore, there is an urgent need to provide a manifold riveting assembly tool and assembly method with high processing accuracy and efficiency to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a riveting assembly tool and an assembly method for a split-type header of an automobile evaporator, so as to solve the above-mentioned problems of the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A riveting assembly tool for a split manifold of an automobile evaporator, comprising a fixing platform, a support frame fixedly mounted on the upper surface of the fixing platform, a pneumatic drive assembly mounted on the upper surface of the support frame, an upper die and a lower die arranged from top to bottom and positioned oppositely, the pneumatic drive assembly being connected to the upper die through a telescopic rod to control the extension distance of the telescopic rod, and the lower die being fixedly mounted above the fixing platform;

[0007] The upper die comprises a first fixed die, a second fixed die and a movable die slidably embedded in the second fixed die, the upper surface of the first fixed die is fixedly connected to the telescopic rod, and the lower surface is connected to the second fixed die through a connecting rod, a protruding pressure column is fixedly provided on the lower surface of the first fixed die, and the pressure column is inclined at an angle θ relative to the first fixed die, a stepped chamber for accommodating the movable die is provided on the second fixed die, a protruding wing is provided on the edge of the movable die, and the wing is slidably overlapped on the step provided in the stepped chamber, a pressure column groove matching the pressure column is provided on the upper surface of the movable die, and a plurality of bending teeth are provided on the lower surface, a through hole corresponding to the bending teeth and for the bending teeth to pass through is provided on the lower surface of the second fixed die, a first limiting plate is provided on the lower surface of the second fixed die, and a second limiting plate is provided on the upper surface of the lower die;

[0008] The split manifold of the automobile evaporator includes a cover plate and a main board. The upper surface of the main board is provided with a plurality of buckle teeth. The cover plate is provided with a first through hole corresponding to the buckle teeth and for the buckle teeth to pass through. The buckle teeth are passed through the first through hole and bent to fix the cover plate above the main board.

[0009] Furthermore, the first limiting plate is provided with a plurality of second through holes for the bending teeth to pass through.

[0010] Furthermore, the first limiting plate is provided with a first limiting block arranged perpendicularly to the second fixed mold plane, the first limiting block is a sawtooth structure, and the second through holes are opened between every two sawteeth, and the second limiting plate is provided with a second limiting block arranged perpendicularly to the lower die plane, and the second limiting block is a rectangular structure.

[0011] As a preferred technical solution of the present invention, the width B of the step 1 Greater than the width B of the wing 2 , and is greater than the maximum sliding stroke x of the wing relative to the step.

[0012] As a preferred technical solution of the present invention, the support frame includes a plurality of support columns and support beams, the lower parts of the plurality of support columns are fixedly mounted on the upper surface of the fixed platform, the upper parts are fixedly mounted with the support beams, and the pneumatic drive assembly is fixedly mounted above the support beams.

[0013] An assembly method for a split-type header riveting assembly tool for an automobile evaporator, used for the split-type header riveting assembly tool for an automobile evaporator, comprises the following steps:

[0014] S100, placing the cover plate and the main board: placing the main board flatly on top of the second limiting plate with the buckle teeth facing upwards, aligning the cover plate with the main board, and sleeve the first through hole on the buckle teeth, thereby completing the preliminary assembly of the split manifold of the automobile evaporator;

[0015] S200, positioning the split manifold of the automobile evaporator: starting the air pressure drive assembly to drive the telescopic rod to extend, driving the upper die to move downward until the first limit plate presses the upper surface of the cover plate, and a plurality of pressure sensors electrically connected to the control assembly are provided at the contact surfaces of the first limit plate and the second limit plate with the split manifold of the automobile evaporator, for monitoring the installation flatness of the split manifold of the automobile evaporator;

[0016] S300, bending the buckle tooth: the control component controls the pressure column to move downward along the inner wall of the pressure column groove, driving the bending tooth to move toward the buckle tooth direction, gradually bending the buckle tooth, and the moving stroke of the bending tooth in the through hole is set to x 2 , the bending force output value of the pressure column is set to F 折弯 ;

[0017] Among them, the moving distance x 2 The inclination angle θ satisfies the following formula:

[0018]

[0019] Where, L is the length of the pressure column slot;

[0020] Wherein, the bending force output value F of the pressure column 折弯 The following formula should be satisfied:

[0021]

[0022] In the formula, F 折弯 is the bending force output value of the pressure column, in N; σ 屈服 is the yield strength of the sprocket, in N / mm 2 ; σ 抗拉 is the tensile strength of the clasp, in N / mm 2 ; t is the thickness of the buckle tooth, in mm; b is the width of the buckle tooth, in mm.

[0023] S400, pressing the buckle teeth: the pneumatic driving component drives the upper pressing die to continue to move downward under the control of the control component, so as to drive the lower surface of the bending tooth to press the buckle teeth continuously for a time period s;

[0024] S500, reset: the pneumatic drive assembly drives the upper die and the pressure column to return to the initial state, releases the pressure acting on the split manifold of the automobile evaporator, and takes out the split manifold of the automobile evaporator for quality inspection.

[0025] As a preferred technical solution of the present invention, in step S300, the moving stroke x of the bending tooth in the through hole 2 The displacement sensor is arranged on the movable mold for monitoring. The displacement sensor is electrically connected to the control component. When the moving stroke x 2 When the deviation from the designed moving stroke x' exceeds the stroke range, the control component issues an alarm to prompt the operator to make corresponding adjustments, as follows:

[0026] ,

[0027]

[0028] Where △x is the moving stroke x 2 The deviation from the designed moving stroke x', D is the designed contact length between the bending tooth and the buckle tooth after the process of bending the buckle tooth is completed;

[0029] When the control component responds to a stop and the pressure column or the movable mold is a new mold, it means that the factory processing accuracy of the pressure column or the movable mold is unqualified, and the operator replaces the unqualified one and adjusts the processing parameters of the pressure column and the movable mold; when the control component responds to a shutdown and the pressure column and the movable mold are old molds, it means that the wear of the pressure column or the movable mold exceeds the production accuracy requirement, and the operator replaces it.

[0030] As a preferred technical solution of the present invention, an infrared heater and a temperature sensor are arranged on the lower surface of the upper die, the infrared heater preheats the buckle teeth to a preset temperature, and the temperature sensor monitors the temperature of the buckle teeth in real time.

[0031] The beneficial effects of the present invention are:

[0032] The present invention realizes the simultaneous bending and pressing process of a plurality of buckle teeth on the split manifold of the automobile evaporator by adopting a plurality of bending teeth on the movable mold, so that the entire riveting process can be completed within one processing cycle, which greatly improves the production efficiency and shortens the production cycle, and solves the problems of low efficiency and unstable processing quality caused by relying on manual bending and pressing of the buckle teeth one by one in the traditional manifold riveting technology.

[0033] At the same time, the present invention also designs the first limit plate and the second limit plate to be of a size and shape that is compatible with the contour of the manifold, so that a uniform clamping force can be applied to the manifold to ensure that the manifold will not deviate during processing, simplifying the operation process and effectively solving the problem of inaccurate assembly caused by relying on workers' naked eye alignment in traditional technology. In addition, force sensors are installed on the first limit plate and the second limit plate to monitor the installation flatness of the manifold, avoiding the problem of uneven pressure in manual operation and reducing the sealing problem caused by inconsistent pressure at the riveting point, thereby improving the quality and reliability of the product.

[0034] Secondly, by analyzing the correlation between the structural accuracy of the new pressure column and the movable mold or the wear degree of the old pressure column and the movable mold and the movable mold movement stroke, a displacement sensor is installed on the movable mold to monitor its movement stroke x in real time. 2 The deviation from the designed moving stroke x' is calculated, and then the ratio of the deviation to the designed contact length between the bending tooth and the buckle tooth is calculated, that is, the ratio of the bending tooth moving deviation to the designed contact length, to effectively reverse and monitor the structural accuracy or wear degree of the pressure column and the movable mold assembly, which solves the deficiency of mold accuracy detection and wear monitoring relying on manual inspection or regular inspection in traditional technology, and avoids the problems of detection lag and unsustainability. Traditional methods can often only find insufficient accuracy or severe wear in the later stage of mold use, thus affecting product quality. By real-time monitoring of deviations, it is possible to timely warn of accuracy deviations occurring during the processing process, avoid mold accuracy reduction or excessive wear, and reduce production accidents and the occurrence of unqualified products. This not only improves the stability and efficiency of the production line, but also makes mold maintenance more scientific, and can intervene before problems occur, thereby effectively avoiding sudden downtime events. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a riveting assembly tool for a split-type header of an automobile evaporator according to the present invention;

[0036] Figure 2 Schematic diagram of the upper die and the lower die of the present invention;

[0037] Figure 3 is a schematic diagram of the second fixed mold of the present invention;

[0038] Figure 4 It is a schematic diagram of a split manifold of an automobile evaporator according to the present invention;

[0039] Figure 5 It is a schematic diagram of the movable mold of the present invention;

[0040] Figure 6 It is a schematic diagram of the lower die of the present invention;

[0041] Figure 7It is a schematic diagram of the state of the pressure column before working of the present invention;

[0042] Figure 8 It is a schematic diagram of the state of the pressure column after the present invention is completed;

[0043] Fig. 9 It is a schematic diagram of the bending teeth and buckling teeth before working of the present invention;

[0044] Fig.10 It is a schematic diagram of the bending teeth and the buckle teeth states during the buckle teeth bending process of the present invention;

[0045] Fig.11 It is a schematic diagram of the bending teeth and the buckling teeth in the process of pressing the buckling teeth of the present invention;

[0046] Fig.12 is a schematic diagram of a buckle of the present invention;

[0047] Fig.13 This is a flow chart of an assembly method of a split-type header riveting assembly tool for an automobile evaporator according to the present invention;

[0048] In the figure, 1-fixed table, 2-support frame, 21-support column, 22-support beam, 3-pneumatic drive assembly, 4-upper die, 41-first fixed die, 411-pressure column, 42-second fixed die, 423-first limit plate, 4231-second through hole, 4232-first limit block, 4233-sawtooth, 43-movable die, 431-wing, 432-pressure column groove, 434-bending tooth, 44-connecting rod, 5-lower die, 51-second limit plate, 511-second limit block, 6-telescopic rod, 7-automobile evaporator split collector, 71-cover plate, 711-first through hole, 72-main board, 721-buckle tooth. DETAILED DESCRIPTION

[0049] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention, and cannot be used to limit the present invention.

[0050] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementations and variations thereof. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0051] Embodiment 1

[0052] like Figures 1 to 12As shown, the riveting assembly tool for the split manifold 7 of the automobile evaporator of the first embodiment includes a fixing platform 1, a support frame 2 fixedly mounted on the upper surface of the fixing platform 1, and also includes a pneumatic drive component 3 mounted on the upper surface of the support frame 2, an upper die 4 and a lower die 5 arranged from top to bottom and positioned oppositely, the pneumatic drive component 3 is connected to the upper die 4 through a telescopic rod 6 to control the extension distance of the telescopic rod 6, and the lower die 5 is fixedly mounted above the fixing platform 1;

[0053] The upper die 4 includes a first fixed die 41, a second fixed die 42, and a movable die 43 slidably embedded in the second fixed die 42. The upper surface of the first fixed die 41 is fixedly connected to the telescopic rod 6, and the lower surface is fixedly connected to the second fixed die 42 through a connecting rod 44. A protruding pressure column 411 is fixedly provided on the lower surface of the first fixed die 41. The pressure column 411 is inclined at an angle θ relative to the first fixed die 41. The second fixed die 42 is provided with a stepped cavity for accommodating the movable die 43. The edge of the movable die 43 is provided with a protruding wing 431, and the wing 431 slides on the movable die 43. Connected to the step provided in the step chamber, the upper surface of the movable mold 43 is provided with a pressure column groove 432 matching the pressure column 411, and the lower surface is provided with a plurality of bending teeth 434, the lower surface of the second fixed mold 42 is provided with a through hole corresponding to the bending teeth 434 and for the bending teeth 434 to pass through, the lower surface of the second fixed mold 42 is provided with a first limiting plate 423, and the upper surface of the lower pressure mold 5 is provided with a second limiting plate 51, the first limiting plate 423 and the second limiting plate 51 jointly limit the plane position of the split collector 7 of the automobile evaporator.

[0054] When the connection relationship between the first fixed mold 41 and the second fixed mold 42 is a fixed connection, the first fixed mold 41 and the second fixed mold 42 always remain in a relatively static state. The working principle of the bending and pressing process of the assembly work is: the pneumatic drive component 3 drives the upper die 4 to move downward as a whole until the first limit plate 423 on the lower surface of the second fixed mold 42 is tightly fitted with the cover plate 71, and the control component independently controls the pressure column 411 to move downward along the inner wall of the pressure column groove 432, so that the bending tooth 434 gradually bends the buckle tooth 721. When the buckle tooth 721 is completely bent, the bending tooth 434 is located directly above the buckle tooth 721, and the pressure column 411 abuts against the end of the pressure column groove 432, so that the first fixed mold 41, the second fixed mold 42 and the movable mold 43 form a relatively static whole, and the pneumatic drive component 3 continues to drive the upper die 4 to move downward as a whole, driving the lower surface of the bending tooth 434 to press the buckle tooth 721.

[0055] The contact surface between the first limit plate 423 and the second limit plate 51 and the split manifold 7 of the automobile evaporator can be designed to match the manifold in size and shape, so as to better adapt to the contour of the manifold, ensure that the manifold always remains in the predetermined position during the riveting process, and reduce positioning errors. In addition, the limit plates can be adjusted and customized according to manifolds of different models or specifications, making them more flexible to meet diverse production needs. The design of the double limit plates can ensure that the manifold will not shift during the processing process, simplify the operation process, and the operator only needs to place the manifold between the limit plates to quickly complete the positioning, reduce human errors, and thus improve the accuracy and consistency of riveting.

[0056] The assembly tooling of this embodiment adopts a design that combines mechanical and pneumatic design as a whole, and is equipped with a control component controlled by a PLC program. The pneumatic drive component 3 cooperates with the mechanical execution structure to achieve efficient riveting operations. At the same time, the tooling also supports manual operations, such as placing the core and taking out the finished product; in addition, the tooling can be equipped with a robotic arm to replace manual placement of semi-finished products and grabbing of finished products, thereby realizing the automation of the production process; the assembly tooling provides two operating modes: automatic operation mode and manual operation mode. The automatic operation mode is a one-button operation, which is suitable for conventional production processes, while the manual operation mode is used for adjustment and maintenance of the equipment mechanism. This flexible operation mode not only improves production efficiency, but also enhances the adaptability of the equipment and meets different production needs.

[0057] Furthermore, the automobile evaporator split manifold 7 includes a cover plate 71 and a main board 72. The upper surface of the main board 72 is provided with a plurality of buckle teeth 721. The cover plate 71 is provided with a first through hole 711 corresponding to the buckle teeth 721 and for the buckle teeth 721 to pass through. The buckle teeth 721 are passed through the first through hole 711 and bent to fix the cover plate 71 above the main board 72.

[0058] The main board 72 is the base of the manifold, and a plurality of buckles 721 are provided on its upper surface for connecting with the cover plate 71. The cover plate 71 is located above the main board 72, and its main function is to seal the top of the manifold to prevent refrigerant leakage. The shape and number of buckles 721 are adjusted according to specific design requirements to adapt to different fluid dynamic characteristics and sealing performance requirements.

[0059] Furthermore, the first limiting plate 423 is provided with a plurality of second through holes 4231 for the bending teeth 434 to pass through.

[0060] Furthermore, the first limiting plate 423 is provided with a first limiting block 4232 which is arranged perpendicular to the plane of the second fixed mold 42, the first limiting block 4232 is a sawtooth structure, and second through holes 4231 are opened between the saw teeth 4233, and the second limiting plate 51 is provided with a second limiting block 511 which is arranged perpendicular to the plane of the lower die 5, and the second limiting block 511 is a rectangular structure.

[0061] The serrated structure on the first limit block 4232 is designed to avoid the buckle 721 part during the riveting process, providing an effective locking mechanism for the collector. During the riveting process, since there are several first through holes 711 for the buckle 721 to pass through at the riveting point of the collector, the serrated structure can avoid these key areas when pressing, ensuring that the buckle 721 is not accidentally crushed or deformed, that is, allowing the buckle 721 to pass through without interfering with the riveting operation, thereby ensuring the accuracy and reliability of the riveting. The rectangular structure of the second limit block 511 is designed to support the lower surface of the collector. Since the lower surface of the collector does not need to be processed, the rectangular structure can provide uniform support force to ensure the stability and flatness of the collector during the riveting process. The rectangular structure is simple and stable, and can effectively transmit pressure, while avoiding unnecessary complex designs and reducing manufacturing costs and process difficulties. The serrated first limit block 4232 is combined with the rectangular second limit block 511, which not only ensures the safety of the buckle tooth 721 part during the riveting process, but also ensures that a uniform clamping force is applied to the collecting pipe, making the riveting process more precise, improving the quality and production efficiency of the product, reducing errors in manual operation, and improving the level of automation, thereby improving production efficiency and product quality.

[0062] In an optional manner in the embodiment of the present invention, the width B of the step 1 Greater than the width B of the wing 431 2 , and is greater than the maximum sliding stroke x of the wing 431 relative to the step.

[0063] In an optional manner in an embodiment of the present invention, the support frame 2 includes a plurality of support columns 21 and a support beam 22, the lower portions of the plurality of support columns 21 are fixedly mounted on the upper surface of the fixed platform 1, the upper portions are fixedly mounted with the support beam 22, and the pneumatic drive assembly 3 is fixedly mounted above the support beam 22.

[0064] like Fig.13 As shown, the assembly method of the split-type header riveting assembly tool for the automobile evaporator of this embodiment is used for the split-type header riveting assembly tool for the automobile evaporator 7, and the assembly method includes the following steps:

[0065] S100, placing the cover plate 71 and the main board 72: placing the main board 72 flatly on the second limiting plate 51, with the buckle teeth 721 facing upward, aligning the cover plate 71 with the main board 72, and sleeve the first through hole 711 on the buckle teeth 721, completing the preliminary assembly of the split manifold 7 of the automobile evaporator;

[0066] S200, positioning the split manifold 7 of the automobile evaporator: starting the air pressure drive assembly 3 to drive the telescopic rod 6 to extend, driving the upper die 4 to move downward until the first limit plate 423 presses the upper surface of the cover plate 71, and a plurality of pressure sensors electrically connected to the control assembly are provided at the contact surfaces of the first limit plate 423 and the second limit plate 51 with the split manifold 7 of the automobile evaporator, so as to monitor the installation flatness of the split manifold 7 of the automobile evaporator;

[0067] By using a precisely controlled pressure sensor to monitor the installation flatness, it is ensured that the first limit plate 423 and the second limit plate 51 are evenly pressed against the collecting pipe, thereby ensuring the smooth installation of the collecting pipe, avoiding the problem of uneven pressure in manual operation, and reducing the sealing problems caused by inconsistent pressure at the riveting points or inaccurate assembly, thereby improving the consistency and reliability of the product.

[0068] S300, bending the buckle tooth 721: the control component controls the pressure column 411 to move downward along the inner wall of the pressure column groove 432, driving the bending tooth 434 to move toward the buckle tooth 721, gradually bending the buckle tooth 721, and the moving stroke of the bending tooth 434 in the through hole is set to x 2 , the bending force output value of the pressure column 411 is set to F 折弯 ;

[0069] Among them, the moving distance x 2 The inclination angle θ satisfies the following formula:

[0070]

[0071] Wherein, L is the length of the pressure column groove 432;

[0072] First, the required bending stroke of the sprocket 721 is determined according to the design size of the sprocket 721, and then the bending movement stroke x is calculated. 2 , establish the moving stroke x of the bending tooth 434 2 The relationship between the angle θ of the pressure column groove 432 and the moving stroke x can be obtained. 2 The corresponding inclination angle θ of the pressure column groove 432 ensures that after the bending tooth 434 completes the bending process on the buckle tooth 721, the bending tooth 434 stops just above the buckle tooth 721 to perform the pressing process on the buckle tooth 721, ensuring that the pressure point is not eccentric.

[0073] The bending force output value F of the pressure column 411 is 折弯 The following formula should be satisfied:

[0074]

[0075] In the formula, F 折弯 is the bending force output value of the pressure column 411, in N; σ 屈服 is the yield strength of the sprocket 721, in N / mm 2 ; σ 抗拉 is the tensile strength of the sprocket 721, in N / mm 2 ; t is the thickness of the buckle tooth 721, in mm; b is the width of the buckle tooth 721, in mm.

[0076] In this embodiment, the split manifold 7 of the automobile evaporator is formed by hot extrusion of aluminum alloy. When processing the main board 72, the buckle teeth 721 are formed integrally with it. Therefore, the buckle teeth 721 are made of aluminum alloy. The thickness t of the buckle teeth 721 is 1.2 mm, the width b is 10 mm, and the yield strength σ of the aluminum alloy is 屈服 276N / mm 2 , tensile strength σ 抗拉 310N / mm 2 , so the bending force output value F of the pressure column 411 折弯 The following formula should be satisfied:

[0077]

[0078] According to the above formula, the bending force output value F of the pressure column 411 can be obtained: 折弯 The range should be set to 3312N~3720N to ensure that the buckle 721 undergoes uniform and sufficient plastic deformation during the bending process, so as to achieve the shape and angle required by the design. Avoid material damage caused by excessive force, such as cracks, fractures or excessive plastic deformation, and avoid the buckle 721 being unable to be completely bent into place due to too little force; by setting the upper and lower limits of the bending force, the consistency of processing by different operators or different batches can be ensured, reducing the impact of human factors on processing quality.

[0079] S400, pressing the buckle teeth 721: the pneumatic driving component 3, under the control of the control component, drives the upper pressing die 4 to continue to move downward, driving the lower surface of the bending tooth 434 to press the buckle teeth 721 for a period of time s;

[0080] The pneumatic drive assembly 3 can accurately control the pressure and pressing time of the upper die 4 on the buckle 721 by controlling the size and duration of the air pressure, thereby avoiding deformation of the buckle 721 due to excessive pressure or loose riveting due to insufficient pressure. During the continuous pressing time s on the buckle 721, the stress inside the material will gradually relax, which helps to reduce residual stress and ensure that the buckle 721 undergoes sufficient plastic deformation after bending, so that it can maintain the desired shape and position after the external force is removed, preventing it from returning to its original state and reducing the rebound phenomenon of the buckle 721 after bending.

[0081] S500, reset: the air pressure driving assembly 3 drives the upper die 4 and the pressure column 411 to return to the initial state, releases the pressure acting on the automobile evaporator split manifold 7, and takes out the automobile evaporator split manifold 7 for quality inspection.

[0082] Quality inspection usually includes visual inspection of riveted points, sealing test and evaluation of surface defects to ensure that each manifold meets the design standards and performance requirements, thereby reducing the risk of rework due to defects and improving overall product reliability and user satisfaction. By introducing automated control, the quality inspection process can also be combined with data collection and analysis to monitor potential problems in the production process in real time, thereby optimizing subsequent manufacturing processes.

[0083] In an optional manner in the embodiment of the present invention, in step S300, the moving stroke x of the bending tooth 434 in the through hole is 2 The displacement sensor (not shown) provided on the movable mold 43 is used for monitoring. The displacement sensor is electrically connected to the control component. 2 When the deviation from the designed moving stroke x' exceeds the stroke range, the control component issues an alarm to prompt the operator to make corresponding adjustments, as follows:

[0084] ,

[0085]

[0086] Where △x is the moving distance x 2 The deviation from the designed moving stroke x', D is the designed contact length between the bending tooth 434 and the buckle tooth 721 after the buckle tooth bending process is completed;

[0087] When the control component responds to a stop and the pressure column 411 or the movable mold 43 is a new mold, it indicates that the factory processing accuracy of the pressure column 411 or the movable mold 43 is unqualified, and the operator replaces the unqualified ones and adjusts the processing parameters of the pressure column 411 and the movable mold 43; when the control component responds to a shutdown and the pressure column 411 and the movable mold 43 are old molds, it indicates that the wear of the pressure column 411 or the movable mold 43 exceeds the production accuracy requirements, and the operator replaces them.

[0088] An optional method in the embodiment of the present invention is to set an infrared heater and a temperature sensor on the lower surface of the upper die 4, the infrared heater preheats the buckle teeth 721 to a preset temperature, and the temperature sensor monitors the temperature of the buckle teeth 721 in real time.

[0089] During the bending process of the buckle tooth 721, internal stress may be generated, resulting in unnecessary rebound after bending. In order to effectively eliminate these internal stresses, the buckle tooth 721 is preheated. Through preheating, the buckle tooth 721 will become softer and more plastic, thereby reducing its elasticity and reducing the rebound phenomenon. This treatment can not only improve the accuracy of bending, but also enhance the stability of the finished product. In addition, infrared radiation is used for heating, which has a fast heating speed, can quickly reach the preset temperature, and the heating is very uniform. The target area can be directly heated, which helps to reduce heat loss.

[0090] Embodiment 2

[0091] The difference between the second embodiment and the first embodiment is that the lower surface of the first fixed mold 41 is slidably connected to the second fixed mold 42 via a connecting rod 44 .

[0092] When the connection relationship between the first fixed mold 41 and the second fixed mold 42 is a sliding connection, the working principle of the bending and pressing process of the assembly work is as follows: the pneumatic driving component 3 drives the upper die 4 to move downward as a whole until the first limit plate 423 on the lower surface of the second fixed mold 42 is tightly fitted with the cover plate 71. Under the control of the control component, the pneumatic driving component 3 controls the upper die 4 to continue to move downward and continuously applies pressure to the cover plate 71. At this time, the second fixed mold 42 is tightly fixed to the upper surface of the cover plate 71 and does not move. The first fixed mold 41 moves toward the second fixed mold 42. The pressure column 411 is driven to move downward along the inner wall of the pressure column groove 432 provided in the movable mold 43, so that the bending tooth 434 gradually bends the buckle tooth 721. When the buckle tooth 721 is completely bent, the bending tooth 434 is located directly above the buckle tooth 721, and the pressure column 411 abuts against the end of the pressure column groove 432, so that the first fixed mold 41, the second fixed mold 42 and the movable mold 43 form a relatively static whole, and the pneumatic drive component 3 continues to drive the upper mold 4 to move downward as a whole, driving the lower surface of the bending tooth 434 to press the buckle tooth 721.

[0093] It should be understood that the above-mentioned embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making pioneering innovations all fall within the scope of protection of the present invention.

Claims

1. An assembly method for a split-type header riveting assembly tool for an automobile evaporator, characterized in that The following steps are involved: S100, placing the split manifold of the automobile evaporator: placing the split manifold of the automobile evaporator on the riveting assembly tool of the split manifold of the automobile evaporator; The automobile evaporator split manifold riveting assembly tool comprises a fixing platform, a support frame fixedly mounted on the upper surface of the fixing platform, and a pneumatic drive assembly mounted on the upper surface of the support frame, an upper die and a lower die arranged from top to bottom and positioned oppositely, the pneumatic drive assembly is connected to the upper die through a telescopic rod to control the extension distance of the telescopic rod, and the lower die is fixedly mounted above the fixing platform; The upper die comprises a first fixed die, a second fixed die and a movable die slidably embedded in the second fixed die, the upper surface of the first fixed die is fixedly connected to the telescopic rod, and the lower surface is connected to the second fixed die through a connecting rod, a protruding pressure column is fixedly provided on the lower surface of the first fixed die, and the pressure column is inclined at an angle θ relative to the first fixed die, a stepped chamber for accommodating the movable die is provided on the second fixed die, a protruding wing is provided on the edge of the movable die, and the wing is slidably overlapped on the step provided in the stepped chamber, a pressure column groove matching the pressure column is provided on the upper surface of the movable die, and a plurality of bending teeth are provided on the lower surface, a through hole corresponding to the bending teeth and for the bending teeth to pass through is provided on the lower surface of the second fixed die, a first limiting plate is provided on the lower surface of the second fixed die, and a second limiting plate is provided on the upper surface of the lower die; The automobile evaporator split manifold comprises a cover plate and a main board, the upper surface of the main board is provided with a plurality of buckle teeth, the cover plate is provided with a first through hole corresponding to the buckle teeth and for the buckle teeth to pass through, the buckle teeth are passed through the first through hole and the buckle teeth are bent, so that the cover plate is fixed above the main board; Place the main board flatly on top of the second limit plate, with the buckle teeth facing upward, align the cover plate with the main board, and sleeve the first through hole on the buckle teeth to complete the preliminary assembly of the split manifold of the automobile evaporator; S200, positioning the split manifold of the automobile evaporator: starting the air pressure drive assembly to drive the telescopic rod to extend, driving the upper die to move downward until the first limit plate presses the upper surface of the cover plate, and a plurality of pressure sensors electrically connected to the control assembly are provided at the contact surfaces of the first limit plate and the second limit plate with the split manifold of the automobile evaporator, for monitoring the installation flatness of the split manifold of the automobile evaporator; S300, bending the buckle tooth: the control component controls the pressure column to move downward along the inner wall of the pressure column groove, driving the bending tooth to move toward the buckle tooth direction, gradually bending the buckle tooth, the moving stroke of the bending tooth in the through hole is set to x2, and the bending force output value of the pressure column is set to Fbend; Among them, the moving stroke x2 and the tilt angle θ satisfy the following formula: Where, L is the length of the pressure column slot; The bending force output value Fbend of the pressure column should satisfy the following formula: In the formula, F 折弯 is the bending force output value of the pressure column, in N; σ 屈服 is the yield strength of the sprocket, in N / mm 2 ; σ 抗拉 is the tensile strength of the clasp, in N / mm 2 ; t is the thickness of the buckle tooth, in mm; b is the width of the buckle tooth, in mm; S400, pressing the buckle teeth: the pneumatic driving component drives the upper pressing die to continue to move downward under the control of the control component, so as to drive the lower surface of the bending tooth to press the buckle teeth continuously for a time period s; S500, reset: the pneumatic drive assembly drives the upper die and the pressure column to return to the initial state, releases the pressure acting on the split manifold of the automobile evaporator, and takes out the split manifold of the automobile evaporator for quality inspection.

2. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 1 is characterized in that: In step S300, the moving stroke x2 of the bending tooth in the through hole is monitored by a displacement sensor provided on the movable mold, and the displacement sensor is electrically connected to the control component. When the deviation between the moving stroke x2 and the designed moving stroke x' exceeds the stroke range, the control component issues an alarm to prompt the operator to make corresponding adjustments, as follows: Wherein △x is the deviation between the moving stroke x2 and the designed moving stroke x', and D is the designed contact length between the bending tooth and the buckle tooth after the process of bending the buckle tooth is completed; When the control component responds to a stop and the pressure column or the movable mold is a new mold, it means that the factory processing accuracy of the pressure column or the movable mold is unqualified, and the operator replaces the unqualified one and adjusts the processing parameters of the pressure column and the movable mold; when the control component responds to a shutdown and the pressure column and the movable mold are old molds, it means that the wear of the pressure column or the movable mold exceeds the production accuracy requirement, and the operator replaces it.

3. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 1 is characterized in that: An infrared heater and a temperature sensor are arranged on the lower surface of the upper die. The infrared heater preheats the buckle teeth to a preset temperature, and the temperature sensor monitors the temperature of the buckle teeth in real time.

4. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 1 is characterized in that: The first limiting plate is provided with a plurality of second through holes for the bending teeth to pass through.

5. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 4 is characterized in that: The first limiting plate is provided with a first limiting block arranged perpendicularly to the second fixed die plane, the first limiting block is a sawtooth structure, and the second through holes are opened between every two sawteeth, the second limiting plate is provided with a second limiting block arranged perpendicularly to the lower die plane, and the second limiting block is a rectangular structure.

6. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 1, characterized in that: The width B1 of the step is greater than the width B2 of the wing, and is greater than the maximum sliding stroke x of the wing relative to the step.

7. The assembly method of the split-type header riveting assembly tool for an automobile evaporator according to claim 1, characterized in that: The support frame includes a plurality of support columns and support beams, the lower parts of the plurality of support columns are fixedly mounted on the upper surface of the fixed platform, the upper parts are fixedly mounted with the support beams, and the pneumatic drive assembly is fixedly mounted above the support beams.

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