Riveting machine for rubber pipe of air conditioner pipe

Abstract

The invention relates to the technical field of rubber tube riveting equipment, in particular to an air conditioner tube rubber tube riveting machine which comprises a rack, a hydraulic driving system, a crimping machine and a controller. The equipment works in two core modes: in the first mode, the controller precisely controls the crimping machine to perform crimping according to feedback of the pressure sensor, so that an actual crimping curve approaches an expected standard; and in the second mode, the controller switches oil ways, supplies oil to the liquid storage chamber of the pulling mechanism, drives the telescopic clamping plate to axially pull the rubber pipe, detects the displacement amount of the rubber pipe through the drawing displacement sensor, and judges that the product is unqualified if the displacement amount exceeds a threshold value. According to the invention, through a set of precise crimping and automatic pull-off test functions, closed-loop quality control of the crimping process and hundred percent on-line nondestructive test of the product connection strength are realized, the reliability and sealing performance of air conditioner pipeline connection are fundamentally ensured, and the production automation level and quality are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of hose riveting equipment technology, specifically an air conditioning hose riveting machine. Background Technology

[0002] In the assembly and production of air conditioning refrigeration pipes, firmly and sealingly crimping the metal sleeve onto the end of the hose is a crucial process. Currently, the commonly used hydraulic or pneumatic crimping equipment primarily focuses on completing the basic crimping action, generally lacking precise monitoring and closed-loop control of the core parameters of the crimping process. This makes the crimping quality largely dependent on the stability of the equipment itself and the experience of the operators, making it difficult to avoid defects such as insufficient crimping or overpressure damage caused by mold wear, hydraulic fluctuations, or batch differences in materials. More importantly, existing technology cannot immediately perform rapid, objective, and non-destructive testing of the connection strength of the finished product after crimping. Quality verification usually relies on subsequent airtightness tests or destructive sampling inspections, which is not only inefficient and increases production costs, but also carries the risk of missing potential quality issues.

[0003] Therefore, it is necessary to develop an air conditioning hose riveting machine to solve the above problems. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] An air conditioning hose riveting machine includes a frame, a hydraulic drive system, a crimping machine, and a controller. The hydraulic drive system includes a cylinder and a pressure sensor. The pressure sensor is used to monitor the crimping pressure of the crimping machine in real time. The system also includes a hose pulling mechanism, which includes a telescopic clamp for clamping the hose body. The telescopic clamp is slidably connected inside a liquid storage chamber. A pull-out displacement sensor is fixedly connected to the bottom of the liquid storage chamber to monitor the movement distance of the telescopic clamp. The controller has pre-stored a standard crimping pressure-displacement curve and a maximum allowable displacement threshold. The controller is configured to: First mode: Control the hydraulic drive system to drive the crimping machine to close the mold, crimp the sleeve on the rubber tube, and based on the feedback of the pressure sensor, make the actual crimping pressure curve approximate the standard crimping pressure-displacement curve pre-stored in the controller; Second mode: After the crimping action is completed, the hydraulic drive system is controlled to fill the reservoir with liquid oil. Then, the telescopic clamp pulls the rubber tube axially to apply tension. The pull-out displacement sensor detects that the displacement of the rubber tube exceeds the maximum allowable displacement threshold, and the product is determined to be unqualified.

[0006] Preferably, the crimping machine is fixedly mounted on a frame, the hydraulic cylinder is fixedly connected to the side wall of the frame, the hydraulic cylinder is connected to a multi-stage hydraulic valve via a pipeline, the multi-stage hydraulic valve is divided into a crimping oil circuit and a pulling oil circuit, the crimping oil circuit is connected to the crimping machine, the crimping oil circuit is fixedly connected to a pressure sensor for real-time monitoring of the crimping pressure of the crimping machine, and the pulling oil circuit is connected to multiple liquid storage chambers via an annular connecting pipe.

[0007] Preferably, the liquid storage chamber is fixedly connected to the movable mold in the crimping machine, and the telescopic clamp is slidably connected inside the liquid storage chamber. The telescopic clamp holds the rubber tube through a fitting structure connected to the head. The bottom of the liquid storage chamber is fixedly connected to the pull-out displacement sensor for detecting the displacement of the rubber tube clamped by the telescopic clamp relative to the crimping machine.

[0008] Preferably, the bonding structure includes an abutment block, the lower end of which is arc-shaped and adapted to the rubber tube, and a sliding post is fixedly connected to the upper end of the abutment block. The sliding post is movably connected to the end of the telescopic clamping plate by a spring. In the initial state, the abutment block is closer to the rubber tube than the movable mold in the crimping machine.

[0009] Preferably, the hydraulic drive system further includes a crimping displacement sensor for detecting the displacement of the cylinder piston rod; the crimping displacement sensor is fixedly connected to the cylinder, and the standard crimping pressure-displacement curve and the actual crimping pressure-displacement curve pre-stored in the controller are both based on the displacement detected by the crimping displacement sensor.

[0010] Preferably, the controller also has a pre-stored pressure tolerance threshold and displacement tolerance threshold; the controller is configured to: in the first mode, calculate in real time the pressure difference between the actual pressure and the standard pressure at the same displacement point, or calculate the displacement difference between the actual displacement and the standard displacement at the same pressure point; when the pressure difference continuously exceeds the pressure tolerance threshold or the displacement difference continuously exceeds the displacement tolerance threshold, it is determined to be abnormal.

[0011] Preferably, the controller is also connected to an audible and visual alarm; the controller is configured to: in the first mode, when the deviation between the actual pressing pressure-displacement curve and the standard pressing pressure-displacement curve exceeds a preset tolerance; or in the second mode, when the pull-out test is determined to be unqualified, control the audible and visual alarm to issue an alarm and interrupt the current operation.

[0012] Preferably, it also includes a support structure, the support structure including a sliding base, the sliding base being slidably connected to the frame via a sliding groove, and a support frame for supporting the rubber tube being fixedly connected to the upper end surface of the sliding base.

[0013] Preferably, it further includes a clamping and anti-detachment unit, which includes a shrink cylinder. The shrink cylinder is fixedly connected to the side fixing surface of the crimping machine. A baffle is slidably connected inside the shrink cylinder. The lower end of the baffle is fixedly connected to the liquid storage chamber through a pull rod. The liquid storage chamber and the shrink cylinder are connected through a suction pipe.

[0014] The beneficial effects of this invention are: This equipment achieves millisecond-level dynamic control of the crimping process parameters by acquiring pressure and displacement data in real time with high precision during the crimping process and strictly comparing it with the preset ideal curve. It can effectively eliminate quality problems such as insufficient pressure, overpressure and abnormal crimping stroke from the source, ensuring a high degree of consistency and reliability in the crimping process.

[0015] This equipment utilizes the same hydraulic system and drive structure to automatically switch to test mode after crimping, applying a quantitative axial tensile force to the crimping point and monitoring displacement. This enables 100% online, non-destructive testing of the connection strength of each product, completely replacing the traditional, inefficient, and destructive sampling inspection method.

[0016] The anti-detachment unit in this equipment ensures that the rubber tube is centered in the sleeve before crimping and eliminates assembly gaps, effectively preventing quality problems such as crimping eccentricity or incomplete crimping caused by the rubber tube being misaligned or not in place. At the same time, the pre-tightening force can counteract the outward creep that the rubber tube may produce during crimping, further ensuring the uniformity and reliability of crimping. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the crimping machine. Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 A schematic diagram of the crimping machine, rubber tubing, and sleeve; Figure 6 A schematic diagram of the structure of the anti-detachment unit; Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 This is a schematic diagram of the hose pulling mechanism; Figure 9 for Figure 8 Enlarged view of point D; In the picture: 1. Frame; 2. Crimping machine; 3. Support structure; 31. Sliding base; 32. Slide groove; 33. Support frame; 4. Anti-detachment unit; 41. Shrink tube; 42. Pull rod; 43. Baffle; 44. Suction tube; 7. Hydraulic drive system; 71. Oil cylinder; 72. Pressure sensor; 73. Crimping oil circuit; 74. Multi-connection hydraulic valve; 75. Crimping displacement sensor; 8. Controller; 81. Audible and visual alarm; 9. Hose pulling mechanism; 91. Pulling oil circuit; 92. Telescopic clamp; 93. Liquid storage chamber; 94. Annular connecting pipe; 95. Pulling displacement sensor; 96. Fitting structure; 961. Abutment block; 962. Sliding column; 963. Spring; 100, rubber tubing; 200, sleeve. Detailed Implementation

[0019] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] The air conditioning hose riveting machine operates in two core modes: Mode 1 (precision crimping) and Mode 2 (pull-out test). The operator places two rubber hoses 100, each fitted with a sleeve 200, into the crimping machine 2 and starts the equipment. The controller 8 first executes Mode 1, controlling the crimping machine 2 to complete the crimping with the optimal pressure-displacement curve. Subsequently, the equipment automatically switches to Mode 2, applying axial tension to the rubber hoses 100 via the hose pulling mechanism 9 to test the firmness of the crimped joint. The entire process is monitored by the controller 8, which immediately alarms upon detecting any abnormality.

[0021] Example: Figures 1-9 As shown, an air conditioning hose riveting machine includes a frame 1, a hydraulic drive system 7, a crimping machine 2, and a controller 8. The hydraulic drive system 7 includes a cylinder 71 and a pressure sensor 72. The pressure sensor 72 is used to monitor the crimping pressure of the crimping machine 2 in real time. It also includes a hose pulling mechanism 9, which includes a telescopic clamping plate 92 for clamping the hose body 100. The telescopic clamping plate 92 is slidably connected inside a liquid storage chamber 93. A pull-out displacement sensor 95 is fixedly connected to the bottom of the liquid storage chamber 93 to monitor the movement distance of the telescopic clamping plate 92. The controller 8 has a pre-stored standard crimping pressure-displacement curve and a maximum allowable displacement threshold. The controller 8 is configured to: First mode: Control the hydraulic drive system 7 to drive the crimping machine 2 to close the mold, crimp the sleeve 200 on the rubber tube 100, and based on the feedback of the pressure sensor 72, make the actual crimping pressure curve approximate the standard crimping pressure-displacement curve pre-stored in the controller 8. Second mode: After the crimping action is completed, the hydraulic drive system 7 is controlled to fill the liquid oil into the liquid storage chamber 93. Then the telescopic clamp 92 pulls the rubber tube 100 to apply axial tension. The pull displacement sensor 95 detects that the displacement of the rubber tube 100 exceeds the maximum allowable displacement threshold, and determines that the product is unqualified. The crimping machine 2 is fixedly mounted on the frame 1. The hydraulic cylinder 71 is fixedly connected to the side wall of the frame 1. The hydraulic cylinder 71 is connected to the multi-stage hydraulic valve 74 through a pipeline. The multi-stage hydraulic valve 74 is divided into a crimping oil circuit 73 and a pulling oil circuit 91. The crimping oil circuit 73 is connected to the crimping machine 2. The pressure sensor 72 for real-time monitoring of the crimping pressure of the crimping machine 2 is fixedly connected to the crimping oil circuit 73. The pulling oil circuit 91 is connected to multiple liquid storage chambers 93 through an annular connecting pipe 94. The liquid storage chamber 93 is fixedly connected to the movable mold in the crimping machine 2. The telescopic clamping plate 92 is slidably connected inside the liquid storage chamber 93. The telescopic clamping plate 92 clamps the rubber tube 100 through the fitting structure 96 connected to the head. The pull-out displacement sensor 95 is fixedly connected to the bottom of the liquid storage chamber 93 to detect the displacement of the rubber tube 100 clamped by the telescopic clamping plate 92 relative to the crimping machine 2.

[0022] Both the annular connecting pipe 94 and the suction pipe 44 are retractable pipes.

[0023] The multi-stage hydraulic valve 74 of the hydraulic drive system 7 receives commands from the controller 8. In the first mode, the multi-stage hydraulic valve 74 delivers pressurized oil to the crimping machine 2 through the crimping oil circuit 73, driving its movable mold to close and complete the crimping. The pressure sensor 72 on the crimping oil circuit 73 monitors the pressure in real time and feeds it back to the controller 8. During crimping, because the abutment block 961 is closer to the rubber tube 100 than the movable mold in the crimping machine 2, the fitting structure 96 has already contacted the rubber tube 100 before the movable mold has even contacted the outer sleeve 200 of the rubber tube 100. After crimping is completed, the controller 8 switches the multi-stage hydraulic valve 74 to deliver pressurized oil through the pull-out oil circuit 91 and the annular connecting pipe 94 to the reservoir 93 fixed on the movable mold. The oil pressure pushes the telescopic clamp 92 in the reservoir 93 to extend outward, at which time the fitting structure 96 at its end tightly clamps the rubber tube 100. Subsequently, controller 8 controls the hydraulic system to continuously pressurize the reservoir 93, and the telescopic clamp 92, under the action of oil pressure, moves axially relative to the sleeve 200, which has been fixed by the mold of the crimping machine 2. The pull-out displacement sensor 95 monitors this displacement in real time.

[0024] Furthermore, the fitting structure 96 includes an abutment block 961, the lower end of which is arc-shaped and adapted to the rubber tube 100. A sliding post 962 is fixedly connected to the upper end of the abutment block 961, and the sliding post 962 is movably connected to the end of the telescopic clamping plate 92 via a spring 963. Initially, the abutment block 961 is closer to the rubber tube 100 than the movable mold in the crimping machine 2. When the movable mold of the crimping machine 2 begins to close but has not yet pressed against the sleeve 200, the abutment block 961 of the fitting structure 96 will contact and abut against the rubber tube 100 first. As the mold continues to advance, the sliding post 962 retracts into the telescopic clamping plate 92 against the force of the spring 963. Meanwhile, the pull rod 42, fixedly connected to the liquid storage chamber 93, pulls the baffle 43 of the anti-detachment unit 4 to move within the shrink cylinder 41, drawing hydraulic oil from the liquid storage chamber 93 through the suction pipe 44 (the multi-connected hydraulic valve 74 acts as a regulator), thereby causing the telescopic clamp 92 to retract. This action is transmitted to the two rubber tubes 100 on the left and right through the abutment block 961, so that their ends generate a pre-tightening force in opposite directions before crimping, tightly adhering to the inside of the sleeve 200. Subsequently, the movable mold contacts the sleeve 200, just enough to crimp the two rubber tubes 100 under the pre-tightening force, effectively preventing the rubber tubes 100 from detaching from the sleeve 200 during the crimping action and improving the crimping effect.

[0025] It is important to understand that the above process ensures that the rubber tube 100 is centered in the sleeve 200 before crimping and eliminates assembly gaps, effectively preventing quality problems such as crimping eccentricity or incomplete crimping caused by the rubber tube being misaligned or not in place. At the same time, the pre-tightening force can counteract the outward creep that the rubber tube 100 may undergo during crimping, further ensuring the uniformity and reliability of the crimping.

[0026] Furthermore, the hydraulic drive system 7 also includes a crimping displacement sensor 75 for detecting the displacement of the piston rod of the cylinder 71; the crimping displacement sensor 75 is fixedly connected to the cylinder 71, and the standard crimping pressure-displacement curve and the actual crimping pressure-displacement curve pre-stored in the controller 8 are both based on the displacement detected by the crimping displacement sensor 75. The controller 8 also has a pressure tolerance threshold and a displacement tolerance threshold pre-stored. The controller 8 is configured to: in the first mode, calculate in real time the pressure difference between the actual pressure and the standard pressure at the same displacement point, or calculate the displacement difference between the actual displacement and the standard displacement at the same pressure point; when the pressure difference continuously exceeds the pressure tolerance threshold or the displacement difference continuously exceeds the displacement tolerance threshold, it is determined to be abnormal. The controller 8 is also connected to an audible and visual alarm 81; the controller 8 is configured to: in the first mode, when the deviation between the actual pressing pressure-displacement curve and the standard pressing pressure-displacement curve exceeds a preset tolerance; or in the second mode when the pull-out test is determined to be unqualified, control the audible and visual alarm 81 to issue an alarm and interrupt the current operation.

[0027] In the first mode, the pressing displacement sensor 75, fixed to the hydraulic cylinder 71, detects the piston rod stroke in real time, and the pressure sensor 72 detects the oil pressure in real time. The controller 8 converts the oil pressure into the actual pressing force based on the piston area of ​​the hydraulic cylinder, and plots a real-time pressing force-displacement curve with the data from the pressing displacement sensor 75 as the abscissa. The controller 8 compares this curve with a pre-stored standard curve. If, at any same displacement point, the difference between the actual pressure and the standard pressure continuously exceeds the pressure tolerance threshold, or if the displacement difference at the same pressure point exceeds the displacement tolerance threshold, the controller 8 determines that the pressing process is abnormal, immediately controls the audible and visual alarm 81 to sound an alarm, and interrupts the pressing process. In the second mode, if the displacement detected by the pull-out displacement sensor 95 exceeds the maximum allowable displacement threshold, the controller 8 determines that the product's pull-out strength is unqualified, and similarly triggers the audible and visual alarm 81.

[0028] It's important to understand that abnormal pressure or displacement is often an early sign of mold wear, hydraulic system malfunction, or defective incoming materials. This function enables predictive maintenance, detecting problems before they lead to large quantities of scrap. The second mode enables online pull-out testing of each crimped joint, replacing the traditional destructive sampling inspection, which ensures full inspection while saving costs.

[0029] Furthermore, it also includes a support structure 3, which includes a sliding base 31. The sliding base 31 is slidably connected to the frame 1 through a sliding groove 32. A support frame 33 for supporting the rubber tube 100 is fixedly connected to the upper end face of the sliding base 31. It also includes a clamping and anti-detachment unit 4, which includes a shrink cylinder 41. The shrink cylinder 41 is fixedly connected to the side fixing surface of the crimping machine 2. A baffle 43 is slidably connected inside the shrink cylinder 41. The lower end of the baffle 43 is fixedly connected to the liquid storage chamber 93 through a pull rod 42. The liquid storage chamber 93 and the shrink cylinder 41 are connected through a suction pipe 44.

[0030] The sliding base 31 of the support structure 3 can move along the slide groove 32 on the frame 1, thereby adjusting the support frame 33 to a suitable support position for the rubber tube 100, preventing the long rubber tube from sagging due to its own weight and affecting assembly and testing.

[0031] The initial stage, when the movable mold of the crimping machine 2 begins to close but has not yet contacted the sleeve 200 for crimping, is a critical time window. At this time, the liquid storage chamber 93 fixed on the movable mold begins to move forward with the mold.

[0032] Pre-contact and positioning: Since the abutment block 961 of the bonding structure 96 protrudes more than the mold end face in the initial state, it will contact the tube body of the two rubber tubes 100 before the mold. This "pre-contact" action physically completes the initial alignment and axial positioning of the rubber tubes 100, ensuring that they are on the axis of the sleeve 200.

[0033] Linkage Triggering and Pre-tensioning: As the movable mold continues to advance, the abutment block 961 is blocked by the rubber tube, causing the sliding column 962 to overcome the force of the spring 963 and begin to retract into the telescopic clamp 92. Almost simultaneously, as the liquid storage chamber 93 continues to advance, the pull rod 42 fixedly connected to it begins to pull the baffle 43 inside the anti-detachment unit 4, causing it to slide inward within the shrinkage cylinder 41.

[0034] Adsorption force is generated: the movement of the baffle 43 increases the volume of the shrink cylinder 41 that was originally sealed by it, forming a negative pressure (vacuum effect). This negative pressure is transmitted to the liquid storage chamber 93 connected to it through the suction pipe 44.

[0035] The pre-tightening action is performed: the negative pressure in the liquid storage chamber 93 acts on the back of the telescopic clamp 92, generating an adsorption force that drives the telescopic clamp 92, along with the abutment block 961, to slide and retract backward. This retraction action, through the abutment block 961 already tightly attached to the tubing, is converted into an axial tensile force on the two tubing tubes 100, causing their ends to move closer together and thus tightly adhere to the inner wall of the sleeve 200. This eliminates all assembly gaps in advance. It ensures that the pressure of the mold is fully utilized for the plastic deformation of the sleeve 200 from the very first moment, ensuring that the crimping process closely matches the preset "pressure-displacement curve," fundamentally guaranteeing sufficient and stable crimping force.

[0036] The workflow is as follows: The operator inserts the ends of the two rubber tubes 100 into the metal sleeve 200 and places the assembly into the mold cavity of the crimping machine 2. After starting the equipment, the controller 8 begins to execute the first mode, namely the precision crimping process.

[0037] The controller 8 first instructs the multi-stage hydraulic valve 74 of the hydraulic drive system 7 to deliver pressurized oil through the crimping oil circuit 73 to the crimping machine 2, driving its movable mold to move towards the fixed mold for mold closing. During this initial mold closing stage, a crucial preparatory action occurs: the reservoir 93, fixedly connected to the movable mold, moves forward, causing the abutment block 961 of the fitting structure 96 mounted at its front end to contact and abut against the body of the rubber tube 100 before the mold. As the movable mold continues to advance, the abutment block 961 is blocked by the rubber tube 100, causing the sliding column 962 to retract inward against the force of the spring 963. Simultaneously, the pull rod 42 fixed to the reservoir 93 begins to pull the baffle 43 of the anti-detachment unit 4 to move within the shrinkage cylinder 41. This action generates negative pressure within the shrinkage cylinder 41, which is transmitted to the reservoir 93 cavity through the suction pipe 44. The negative pressure attracts the telescopic clamp 92 to generate a contraction displacement. This displacement is converted into an axial pulling force on the two rubber tubes 100 on the left and right through the abutment block 961, so that their ends are tightened towards the center and tightly attached to the inner wall of the sleeve 200, thus completing automatic centering and pre-tightening.

[0038] Subsequently, the active mold officially contacts and begins to press the sleeve 200, and the crimping process fully commences. During this process, the crimping displacement sensor 75, fixedly connected to the hydraulic cylinder 71, detects the stroke displacement of the piston rod in real time. Simultaneously, the pressure sensor 72, installed on the crimping oil circuit 73, monitors the system pressure in real time. The controller 8 converts the pressure value into the actual crimping force based on the piston area of ​​the hydraulic cylinder 71. The controller 8 plots the actual crimping force displacement curve in real time using the data from the crimping displacement sensor 75 as the abscissa and compares it with the pre-stored standard crimping force displacement curve. The controller 8 calculates the difference between the actual pressure and the standard pressure at the same displacement point in real time. If the difference continuously exceeds the pre-stored pressure tolerance threshold, the crimping process is deemed abnormal. Once an abnormality is determined, the controller 8 immediately controls the audible and visual alarm 81 to sound an alarm and interrupt the crimping process. If the entire process is normal, the controller 8 controls the crimping machine 2 to complete the entire crimping stroke, causing the sleeve 200 to undergo precise plastic deformation, biting the rubber tube 100, and forming a firm sealing connection.

[0039] After the crimping action is completed, the equipment automatically switches to the second mode, namely the automatic pull-out test process. Controller 8 switches the multi-stage hydraulic valve 74, delivering pressurized oil through the pull-out oil circuit 91 and the annular connecting pipe 94 to the reservoir 93. The pressurized oil pushes the telescopic clamp 92 outward, causing its end fitting structure 96 to tightly clamp the body of the rubber tube 100. Subsequently, controller 8 controls the hydraulic system to continuously pressurize the reservoir 93. Under the drive of the oil pressure, the telescopic clamp 92, carrying the clamped rubber tube 100, moves axially relative to the sleeve 200 fixed by the crimping machine 2 mold, applying a gradually increasing tensile force to the crimping point (the tensile force will decrease after a preset peak value). The pull-out displacement sensor 95, fixedly installed at the bottom of the reservoir 93, monitors the displacement of the telescopic clamp 92 in real time, that is, the displacement of the rubber tube 100 relative to the sleeve 200. The controller 8 continuously reads the displacement value. If the value exceeds the maximum allowable displacement threshold stored in the controller 8, it indicates that the tensile strength of the crimping point is insufficient and that relative slippage has occurred between the sleeve 200 and the rubber tube 100. The controller 8 then determines that the product is unqualified and immediately controls the audible and visual alarm 81 to emit an audible and visual signal that is different from the process abnormality alarm, prompting the operator to handle this unqualified product.

[0040] Throughout the entire process, the sliding base 31 of the support structure 3 can move along the slide groove 32 on the frame 1, thereby adjusting the upper support frame 33 to a suitable support position for the rubber tube 100, providing stable support for the long pipeline and preventing it from sagging due to its own weight, which would affect the assembly and testing accuracy. Ultimately, only products that successfully pass the first mode precision crimping test and the second mode pull-out test will be considered good products and flow into the next process, thus achieving the integration of production and inspection and ensuring product quality.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air conditioning hose riveting machine, comprising a frame (1), a hydraulic drive system (7), a crimping machine (2), and a controller (8), wherein the hydraulic drive system (7) includes a cylinder (71) and a pressure sensor (72), the pressure sensor (72) being used to monitor the crimping pressure of the crimping machine (2) in real time, characterized in that: It also includes a hose pulling mechanism (9), which includes a telescopic clamp (92) for clamping the body of the rubber hose (100). The telescopic clamp (92) is slidably connected inside the liquid storage chamber (93). A pull-out displacement sensor (95) is fixedly connected to the bottom of the liquid storage chamber (93) for monitoring the movement distance of the telescopic clamp (92). The controller (8) has a pre-stored standard crimping pressure-displacement curve and a maximum allowable displacement threshold. The controller (8) is configured as follows: First mode: Control the hydraulic drive system (7) to drive the crimping machine (2) to close the mold, crimp the sleeve (200) on the rubber tube (100), and based on the feedback of the pressure sensor (72), make the actual crimping pressure curve approximate the standard crimping pressure-displacement curve pre-stored in the controller (8); Second mode: After the crimping action is completed, the hydraulic drive system (7) is controlled to fill the liquid oil into the liquid storage chamber (93). Then the telescopic clamp (92) pulls the rubber tube (100) to apply axial tension. The pull displacement sensor (95) detects that the displacement of the rubber tube (100) exceeds the maximum allowable displacement threshold and determines that the product is unqualified.

2. The air conditioning hose riveting machine according to claim 1, characterized in that: The crimping machine (2) is fixedly installed on the frame (1). The oil cylinder (71) is fixedly connected to the side wall of the frame (1). The oil cylinder (71) is connected to the multi-stage hydraulic valve (74) through a pipeline. The multi-stage hydraulic valve (74) is divided into a crimping oil circuit (73) and a pulling oil circuit (91). The crimping oil circuit (73) is connected to the crimping machine (2). The pressure sensor (72) for real-time monitoring of the crimping pressure of the crimping machine (2) is fixedly connected to the crimping oil circuit (73). The pulling oil circuit (91) is connected to multiple liquid storage chambers (93) through an annular connecting pipe (94).

3. The air conditioning hose riveting machine according to claim 2, characterized in that: The liquid storage chamber (93) is fixedly connected to the movable mold in the crimping machine (2). The telescopic clamp (92) is slidably connected inside the liquid storage chamber (93). The telescopic clamp (92) clamps the rubber tube (100) through the fitting structure (96) connected to the head. The pull-out displacement sensor (95) is fixedly connected to the bottom of the liquid storage chamber (93) to detect the displacement of the rubber tube (100) clamped by the telescopic clamp (92) relative to the crimping machine (2).

4. The air conditioning hose riveting machine according to claim 3, characterized in that: The bonding structure (96) includes an abutment block (961), the lower end of which is arc-shaped and adapted to the rubber tube (100). The upper end of the abutment block (961) is fixedly connected to a sliding column (962), which is movably connected to the end of the telescopic clamp (92) by a spring (963). In the initial state, the abutment block (961) is closer to the rubber tube (100) than the movable mold in the crimping machine (2).

5. The air conditioning hose riveting machine according to claim 1, characterized in that: The hydraulic drive system (7) also includes a crimping displacement sensor (75) for detecting the displacement of the piston rod of the cylinder (71); the crimping displacement sensor (75) is fixedly connected to the cylinder (71), and the standard crimping pressure-displacement curve and the actual crimping pressure-displacement curve pre-stored in the controller (8) are based on the displacement detected by the crimping displacement sensor (75).

6. The air conditioning hose riveting machine according to claim 1, characterized in that: The controller (8) also has a pressure tolerance threshold and a displacement tolerance threshold pre-stored. The controller (8) is configured to: in the first mode, calculate the pressure difference between the actual pressure and the standard pressure at the same displacement point in real time, or calculate the displacement difference between the actual displacement and the standard displacement at the same pressure point; when the pressure difference continuously exceeds the pressure tolerance threshold or the displacement difference continuously exceeds the displacement tolerance threshold, it is determined to be abnormal.

7. The air conditioning hose riveting machine according to claim 6, characterized in that: The controller (8) is also connected to an audible and visual alarm (81); the controller (8) is configured to: in the first mode, when the deviation between the actual pressing pressure-displacement curve and the standard pressing pressure-displacement curve exceeds the preset tolerance; or in the second mode when the pull-out test is determined to be unqualified, control the audible and visual alarm (81) to issue an alarm and interrupt the current operation.

8. The air conditioning hose riveting machine according to claim 1, characterized in that: It also includes a support structure (3), which includes a sliding base (31), which is slidably connected to the frame (1) via a slide groove (32), and a support frame (33) for supporting the rubber tube (100) is fixedly connected to the upper end face of the sliding base (31).

9. The air conditioning hose riveting machine according to claim 1, characterized in that: It also includes a clamping and anti-detachment unit (4), which includes a shrink tube (41). The shrink tube (41) is fixedly connected to the side fixing surface of the crimping machine (2). A baffle (43) is slidably connected inside the shrink tube (41). The lower end of the baffle (43) is fixedly connected to the liquid storage chamber (93) through a pull rod (42). The liquid storage chamber (93) and the shrink tube (41) are connected through a suction pipe (44).

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