Automobile part brazing leakage test equipment

Abstract

The invention discloses automobile part brazing leakage testing equipment, which is applied to the technical field of brazing leakage testing equipment, and is characterized in that the automobile part brazing leakage testing equipment comprises a testing seat; a clamping assembly used for synchronously clamping a plurality of to-be-tested parts is movably connected to the testing base based on the feeding and discharging conveying assembly, and a lower sealing base and an upper sealing base are fixedly connected to the testing station of the testing base in the vertical direction based on the guide pressing assembly. The lower sealing seat and the upper sealing seat form a sealing test cavity, the lower sealing seat is uniformly and fixedly connected with a plurality of sealing positioning assemblies, the upper sealing seat is fixedly provided with an inflation recovery assembly, and the sealing positioning assemblies are internally and fixedly connected with vacuum suction pipes and helium detection assemblies used for detecting helium; the method has the technical effects that the test efficiency is improved, and the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brazing leak testing equipment, in particular to an automobile part brazing leak testing equipment. BACKGROUND

[0002] In the automobile industry, precise parts such as valve bases of CDC active suspension systems shown in the drawings often use brazing process to achieve high-strength and high-airtightness connection of multiple structures, and the sealing of the brazing part directly determines the operation reliability of the key system in the automobile. Since the valve base of the CDC active suspension system needs to bear a dynamic hydraulic pressure of 0~10Bar for a long time, if there are small pores, incomplete fusion or cracks in the brazing seam, it will cause hydraulic oil leakage, leading to inaccurate damping coefficient adjustment, system response lag, and even suspension failure, which threatens the safety of vehicle driving. Therefore, the precise parts processed based on the brazing process must be tested for brazing leakage after production to avoid defects such as gaps. The current mainstream testing method in the industry is the helium positive pressure method, that is, by filling the part with pressurized helium, using the characteristics of small helium molecule diameter and easy penetration of defects, and capturing the leakage signal with a helium mass spectrometer leak detector to determine whether the brazing part has defects. At present, the existing brazing leak testing equipment mostly places the parts to be tested on the testing station manually, then operates the pressing device to press the workpiece on the workbench to realize sealing, then fills high-pressure helium into the part, and manually holds the detection probe of the helium mass spectrometer leak detector to slowly scan along all the brazing seams of the part. The probe captures the leaked helium molecules and converts them into an electric signal to obtain the leakage signal. This way, only one part can be tested at a time, the testing efficiency is low, and after the test is completed, the helium is discharged from the part in an open straight-through manner, which leads to waste of helium and increases the cost of testing, so it needs to be improved. SUMMARY

[0003] The purpose of the present application is to provide an automobile part brazing leak testing equipment, which has the advantages of improving the testing efficiency and reducing the testing cost.

[0004] The above technical purpose of the present application is realized by the following technical scheme: a kind of automobile parts brazing leakage test equipment, including test seat;The test seat is movably connected with the clamping assembly for synchronously clamping several parts to be tested based on feeding and discharging conveying assembly, and the test station of the test seat is respectively fixedly connected with lower sealing seat and movably connected with upper sealing seat along vertical direction based on guide compression assembly, the lower sealing seat and the upper sealing seat form the sealing test cavity for accommodating the part to be tested, the lower sealing seat is uniformly fixedly connected with a plurality of sealing positioning assemblies for positioning the part to be tested and realizing sealing, the upper sealing seat is fixedly provided with the filling and recovery assembly for filling high-pressure helium into the sealing test cavity and recovering helium after test, and the sealing positioning assembly is also respectively fixedly connected with vacuum suction tube for vacuumizing inside the part and helium detection assembly for detecting helium.

[0005] The present application is further provided that: the feeding and discharging conveying assembly includes a horizontal screw rod conveying sliding table fixedly connected to the test seat along the feeding direction of the part to be tested, and a horizontal conveying seat fixedly connected to the sliding end of the horizontal screw rod conveying sliding table along the horizontal direction, the horizontal conveying seat is fixedly connected with lifting take-off cylinder along the vertical direction to drive the clamping assembly to realize lifting to realize feeding and discharging.

[0006] The present application is further provided that: the clamping assembly includes a clamping mounting plate fixedly connected to the extension end of the lifting take-off cylinder along the horizontal direction, and a plurality of jaw air cylinders uniformly and fixedly connected to the clamping mounting plate, the clamping end of the jaw air cylinder is fixedly connected with a clamping block for clamping the part.

[0007] The present application is further provided that: the guide compression assembly includes a vertical mounting seat fixedly connected to the test seat along the vertical direction, and a compression cylinder fixedly connected to the vertical mounting seat along the vertical direction for driving the upper sealing seat to press down, the lower sealing seat is fixedly connected with a plurality of guide rods along the vertical direction, and the upper sealing seat is fixedly connected with a guide sleeve matched with the guide rods.

[0008] The present application is further provided that: the upper end surface of the lower sealing seat is provided with a plurality of sealing grooves arranged around the sealing test cavity, and the sealing grooves are fixedly connected with sealing rings for ensuring the sealing performance of the sealing test cavity.

[0009] The present application is further provided that: the sealing positioning assembly includes a positioning rod fixedly connected to the lower sealing seat along the vertical direction for inserting into the part to be tested to realize positioning of the part to be tested, and a sealing capsule fixedly connected to the lower sealing seat based on pressure to seal the bottom of the part to be tested, and the sealing capsule is coaxial with the positioning rod.

[0010] The application is further provided with: the sealing capsule ring comprises a flexible sealing base fixedly connected to the lower sealing seat and an inflation cavity opened in the flexible sealing base, a plurality of arc-shaped supporting blocks for supporting the bottom of the part to be tested are uniformly and fixedly connected to the flexible sealing base at the bottom of the inflation cavity along the circumferential direction, the arc-shaped supporting blocks form channels for the gas in the inflation cavity to flow, an outer abutting part for abutting against the outer shaft wall of the part to be tested is integrally connected to one end of the flexible sealing base away from the positioning rod, an inner abutting part for abutting against the inner shaft wall of the part to be tested is integrally connected to one end of the flexible sealing base close to the positioning rod, the height of the outer abutting part is higher than the height of the inner abutting part, and the pressure in the inflation cavity is not higher than 1 / 3 of the pressure in the sealing test cavity.

[0011] The application is further provided with: the helium detection assembly comprises a detection mounting rack fixedly connected to the lower sealing seat and a plurality of mounting rings arranged in steps on the detection mounting rack and corresponding to the brazing positions of the part to be tested, the mounting rings coincide with the axis of the positioning rod, and at least three detection heads for detecting helium are uniformly and fixedly arranged on the mounting rings along the circumferential direction.

[0012] The application is further provided with: the helium inflation and recovery assembly comprises an inflation pipe and a recovery pipe fixedly connected to the upper sealing seat respectively, the inflation pipe is used for inflating high-pressure helium into the sealing test cavity, the recovery pipe is used for discharging the helium in the sealing test cavity to realize recovery after the test is completed, the inflation pipe and the recovery pipe are connected to a helium storage tank, and an inflation pump and a suction pump are fixedly connected to the inflation pipe and the recovery pipe respectively.

[0013] The application is further provided with: the test seat is also fixedly connected with a blowing and cleaning assembly for blowing and cleaning the inner wall and the outer wall of the part to be tested before the test, the blowing and cleaning assembly comprises a plurality of first blowing pipes fixedly connected to the test seat and used for extending into the part to be tested to blow and clean the inner wall of the part to be tested and a plurality of second blowing pipes arranged around the first blowing pipes and used for blowing and cleaning the outer wall of the part to be tested, and the test seat is also fixedly connected with a cleaning felt for adsorbing and cleaning the impurities on the bottom surface of the part to be tested to avoid the part to be tested from piercing the sealing capsule ring.

[0014] In summary, the application has the following beneficial effects: 1. The application is characterized in that a clamping assembly for synchronously clamping a plurality of parts to be tested is arranged on the test seat based on the feeding and conveying assembly, the feeding and conveying assembly realizes the feeding and conveying of the parts to be tested between the feeding station and the test station through the horizontal screw conveying sliding table, and the clamping assembly is lifted by the lifting material taking and placing cylinder to synchronously realize the clamping feeding and conveying of a plurality of parts to be tested, without manual feeding and conveying, a plurality of sealing and positioning assemblies for positioning the parts to be tested and realizing sealing are uniformly and fixedly arranged on the lower sealing seat to realize the positioning and sealing of a plurality of parts to be tested at the same time, so that the sealing test cavity formed after the upper sealing seat and the lower sealing seat are closed can synchronously accommodate a plurality of parts to be tested for testing, greatly improving the testing efficiency, the sealing and positioning assembly is characterized in that a positioning rod is arranged on the lower sealing seat, and a sealing capsule for sealing the bottom of the part to be tested is arranged, when testing, the part to be tested is first positioned by the positioning rod, at this time, the bottom of the part to be tested abuts on the sealing capsule, then the upper sealing seat is driven downward by the guiding and pressing assembly to abut on the lower sealing seat to form a sealing test cavity, at the same time, the inner wall top surface of the upper sealing seat abuts on the top surface of the part to be tested to make the bottom surface of the part to be tested abut on the arc-shaped supporting block, then the air charging and recovering assembly injects high-pressure helium into the sealing test cavity and discharges the air inside the part through the vacuum suction pipe, at this time, due to the increase of the air pressure outside the part, the outer abutting part is pressed and tightly fitted on the outer shaft wall of the part to be tested, the outer abutting part is compressed to make the air in the air charging cavity enter the inner abutting part to increase the air pressure at the inner abutting part, and due to the decrease of the air pressure inside the part, the inner abutting part is pressed and tightly fitted on the inner shaft wall of the part to be tested by the internal air pressure, thereby ensuring the sealing property of the part to be tested and the accuracy of the test result, the helium detection assembly is characterized in that a detection mounting frame is arranged on the lower sealing seat, a mounting ring in a stepped shape and corresponding to the brazing position of the part to be tested is arranged on the detection mounting frame, and a plurality of helium detection heads are arranged on the mounting ring in the circumferential direction, due to the pressure difference between the inside and outside of the part, the high-pressure helium in the sealing test cavity will seep into the inside of the part to be tested along the leakage position of the part to be tested to be automatically detected by the detection head, thereby realizing automatic leakage detection and accurately locking the leakage position, greatly improving the testing efficiency. 2. The air charging and recovering assembly is characterized in that an air charging pipe and a recovering pipe are respectively arranged on the upper sealing seat, when testing, the high-pressure helium in the helium storage tank is injected into the sealing test cavity by the air charging pump, and when the testing is completed, the helium in the sealing test cavity is recovered and injected into the helium storage pipe by the air pump to be recovered, thereby greatly reducing the waste of helium, and unlike the existing method of injecting high-pressure helium into the part, the application realizes the synchronous testing of a plurality of parts to improve the testing efficiency, and also facilitates the recovery of helium. 3. The first blowing pipe and the second blowing pipe of the blowing and cleaning assembly blow and clean the inner wall and the outer wall of the part to be tested before testing, so as to avoid the welding slag from blocking the leakage and affecting the test result, and the cleaning felt is attached on the test seat to clean the impurities on the bottom surface of the part to be tested to avoid the sealing capsule from being punctured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the part to be tested in the embodiment; Figure 2 is an enlarged schematic view of part A of Figure 1 Figure 3 is an enlarged schematic view of part B of Figure 1 Figure 4 is a structural sectional view of the sealing capsule in the embodiment; Figure 5 is a structural schematic view of the helium detection assembly in the embodiment.

[0016] Reference signs: 1, test seat; 2, feeding and discharging conveying assembly; 21, horizontal screw rod conveying sliding table; 22, horizontal conveying seat; 23, lifting and placing material cylinder; 3, clamping assembly; 31, clamping mounting plate; 32, clamping jaw cylinder; 33, clamping block; 4, lower sealing seat; 5, guiding and pressing assembly; 51, vertical mounting seat; 52, pressing cylinder; 53, guiding rod; 54, guiding sleeve; 55, sealing groove; 56, sealing ring; 6, upper sealing seat; 7, sealing positioning assembly; 71, positioning rod; 72, sealing capsule; 721, flexible sealing base body; 722, inflation cavity; 723, arc-shaped supporting block; 724, outer abutting portion; 725, inner abutting portion; 8, inflation and recovery assembly; 81, inflation pipe; 82, recovery pipe; 83, helium storage tank; 84, inflation pump; 85, air extraction pump; 9, helium detection assembly; 91, detection mounting frame; 92, mounting ring; 93, detection head; 10, vacuum suction pipe; 11, blowing and cleaning assembly; 111, first blowing pipe; 112, second blowing pipe; 113, cleaning felt. DETAILED DESCRIPTION

[0017] The application will be further described in detail below with reference to the drawings.

[0018] Embodiment: Reference Figures 1 to 5 ​​The utility model relates to a kind of automobile parts brazing leakage test equipment, including test seat 1, in test seat 1 based on feeding and discharging conveying assembly 2 active connection has for synchronously clamping several parts to be measured Clamping assembly 3, in the test station of test seat 1 respectively fixedly connected with lower seal seat 4 and based on guiding and pressing assembly 5 vertically active connection with upper seal seat 6, lower seal seat 4 and upper seal seat 6 form the sealed test cavity for accommodating part to be measured, a plurality of sealing positioning assembly 7 for positioning part to be measured and realizing sealing are uniformly fixedly connected on lower seal seat 4, sealing positioning assembly 7 is fixedly provided with the helium filling and recovery assembly 8 for filling into high-pressure helium in sealed test cavity and carrying out helium recovery after testing in sealing seat, vacuum suction tube 10 for vacuumizing inside part and helium detection assembly 9 for detecting helium are also respectively fixedly connected in sealing positioning assembly 7, vacuum pump is connected to vacuum suction tube 10, when testing, upper seal seat 6 is driven to abut on lower seal seat 4 by guiding and pressing assembly 5 to form sealed test cavity, then helium filling and recovery assembly 8 fills into high-pressure helium in sealed test cavity, and vacuumizing inside part to be measured is carried out by vacuum suction tube 10, due to the pressure difference inside and outside part, helium will enter part inside along leakage to be detected by helium detection assembly 9 and lock leakage position, by vacuumizing inside part, high-pressure helium is filled in outside part, so that it can be recovered to helium while realizing the test of multiple parts to improve test efficiency.

[0019] Reference Figures 1 to 2 Specifically, feeding and discharging conveying assembly 2 includes horizontal lead screw conveying sliding table 21 fixedly connected on test seat 1 along the feeding direction of part to be measured, and horizontal conveying seat 22 fixedly connected on the sliding end of horizontal lead screw conveying sliding table 21 along the horizontal direction, lifting and placing material cylinder 23 is fixedly connected on horizontal conveying seat 22 along the vertical direction to drive clamping assembly 3 to realize lifting to realize feeding and discharging, clamping assembly 3 includes clamping mounting plate 31 fixedly connected on the telescopic end of lifting and placing material cylinder 23 along the horizontal direction, and a plurality of jaw cylinders 32 uniformly and interval fixedly connected on clamping mounting plate 31, clamping block 33 for clamping part is fixedly connected on the clamping end of jaw cylinder 32, feeding and discharging conveying assembly 2 realizes feeding and discharging conveying of part to be measured between feeding station and test station by horizontal lead screw conveying sliding table 21, and lifting and placing material cylinder 23 drives clamping assembly 3 to lift to realize the clamping feeding and discharging of multiple parts to be measured synchronously, without manual feeding and discharging.

[0020] Reference Figure 1 And Figure 3Specifically, the guiding and pressing assembly 5 comprises a vertical mounting base 51 fixedly connected to the test seat 1 along the vertical direction, a pressing cylinder 52 fixedly connected to the vertical mounting base 51 along the vertical direction and used for driving the upper sealing seat 6 to move downward, a plurality of guiding rods 53 fixedly connected to the lower sealing seat 4 along the vertical direction, and a guiding sleeve 54 fixedly connected to the upper sealing seat 6 and matched with the guiding rods 53. When testing, the upper sealing seat 6 is driven by the pressing cylinder 52 to move downward and abut against the lower sealing seat 4, so that the pressing is realized. At this time, the inner wall top surface of the upper sealing seat 6 abuts against the top surface of the part to be tested, so that the part to be tested is pressed and fixed on the sealing and positioning assembly 7. The cooperation of the guiding rods 53 and the guiding sleeve 54 ensures the stability of the upper sealing seat 6 during the lifting process. A plurality of sealing grooves 55 are arranged around the sealing test cavity on the upper end surface of the lower sealing seat 4. A sealing ring 56 used for ensuring the sealing performance of the sealing test cavity is fixedly connected in the sealing grooves 55. The sealing ring 56 ensures the sealing performance of the sealing test cavity when the upper sealing seat 6 and the lower sealing seat 4 are combined, so that the leakage of high-pressure helium is avoided.

[0021] Reference Figure 3 and Figure 4, specifically, the sealing positioning assembly 7 includes a positioning rod 71 fixedly connected to the lower sealing seat 4 along the vertical direction, used for inserting into the inside of the part to be tested to realize positioning of the part to be tested, and a sealing capsule 72 fixedly connected to the lower sealing seat 4, used for sealing the bottom of the part to be tested based on pressure, the sealing capsule 72 coincides with the axis of the positioning rod 71, the sealing capsule 72 includes a flexible sealing base 721 fixedly connected to the lower sealing seat 4 and an inflation cavity 722 opened in the inside of the flexible sealing base 721, a plurality of arc-shaped supporting blocks 723 for supporting the bottom of the part to be tested are uniformly and spaced apart in the circumferential direction at the bottom of the flexible sealing base 721, the arc-shaped supporting blocks 723 form passages for gas flow in the inflation cavity 722, an outer abutting portion 724 for abutting against the outer shaft wall of the part to be tested is integrally connected to one end of the flexible sealing base 721 away from the positioning rod 71, and an inner abutting portion 725 for abutting against the inner shaft wall of the part to be tested is integrally connected to the other end of the flexible sealing base 721 close to the positioning rod 71, the inner wall top surface of the upper sealing seat 6 abuts against the top surface of the part to be tested, so that the bottom surface of the part to be tested abuts against the arc-shaped supporting blocks 723, then the sealing test cavity is filled with high-pressure helium by the helium inflation and recovery assembly 8, and the air in the inside of the part is exhausted through the vacuum suction pipe 10, at this time, the outer abutting portion 724 is pressed and tightly attached to the outer shaft wall of the part to be tested due to the increase of the gas pressure outside the part, the outer abutting portion 724 is compressed, so that the air in the inflation cavity 722 enters the inner abutting portion 725, thereby increasing the gas pressure at the inner abutting portion 725, and the inner abutting portion 725 is pressed and tightly attached to the inner shaft wall of the part to be tested due to the decrease of the gas pressure in the inside of the part, thereby ensuring the sealing property of the part to be tested, the height of the outer abutting portion 724 is higher than the height of the inner abutting portion 725, and the pressure in the inflation cavity 722 is not higher than 1 / 3 of the pressure in the sealing test cavity, the height of the outer abutting portion 724 is set to be higher than the height of the inner abutting portion 725, so that when the air in the inflation cavity 722 enters the inner abutting portion 725, the gas pressure at the inner abutting portion 725 is further increased, thereby ensuring the sealing property between the inner abutting portion 725 and the inner shaft wall of the part to be tested.

[0022] Reference Figure 3 and Figure 5 , specifically, the helium detection assembly 9 includes a detection mounting frame 91 fixedly connected to the lower sealing seat 4 and a plurality of mounting rings 92 arranged in steps on the detection mounting frame 91 and corresponding to the brazing positions of the part to be tested, the mounting rings 92 coincide with the axis of the positioning rod 71, at least three detection heads 93 for detecting helium are uniformly and spaced apart in the circumferential direction on the mounting rings 92, the high-pressure helium in the sealing test cavity seeps into the inside of the part to be tested along the leakage position of the part to be tested, thereby being automatically detected by the detection head 93 at the position, the leakage position is locked by locking the detection head 93 with the strongest locking signal, thereby realizing automatic leakage detection and accurately locking the leakage position.

[0023] Reference Figure 1 Specifically, the helium charging and recovering assembly 8 includes a charging pipe 81 and a recovering pipe 82 fixedly connected to the upper sealing seat 6 respectively, the charging pipe 81 and the recovering pipe 82 are connected to a helium storage tank 83, the charging pipe 81 and the recovering pipe 82 are fixedly connected with a charging pump 84 and an air pump 85 respectively, when testing, the charging pump 84 charges high-pressure helium in the helium storage tank 83 into the sealing test cavity, when testing is completed, the air pump 85 recovers the helium in the sealing test cavity into the helium storage tank for recycling, which greatly reduces the waste of helium.

[0024] Reference Figure 1 Specifically, the test seat 1 is also fixedly connected with a blowing and cleaning assembly 11 for blowing and cleaning the inner wall and the outer wall of the tested part before testing, the blowing and cleaning assembly 11 includes a plurality of first blowing pipes 111 fixedly connected to the test seat 1 and used for extending into the tested part to blow and clean the inner wall of the tested part, and a plurality of second blowing pipes 112 arranged around the first blowing pipes 111 and used for blowing and cleaning the outer wall of the tested part, and a cleaning felt 113 fixedly connected to the test seat 1 and used for adsorbing and cleaning the impurities on the bottom surface of the tested part to avoid piercing the sealing capsule ring 72, the inner wall and the outer wall of the tested part are blown and cleaned by the first blowing pipes 111 and the second blowing pipes 112 of the blowing and cleaning assembly 11 before testing, so as to avoid that the welding slag blocks the leakage position and affects the test result, and the cleaning felt 113 is arranged on the test seat 1 to clean the impurities on the bottom surface of the tested part to avoid piercing the sealing capsule ring 72.

[0025] The use process is briefly described as follows: first, a plurality of tested parts are synchronously clamped and conveyed to the blowing and cleaning assembly 11 by the feeding and conveying assembly 2 for cleaning, then the cleaned tested parts are conveyed to the sealing and positioning assembly 7 for positioning, then the upper sealing seat 6 is driven to descend to the lower sealing seat 4 to form a sealing test cavity, and the inner wall top surface of the upper sealing seat 6 abuts against the top surface of the tested part, so that the bottom surface of the tested part abuts against the arc-shaped supporting block 723, finally, the helium charging and recovering assembly 8 charges high-pressure helium into the sealing test cavity, and the air in the tested part is discharged through the vacuum suction pipe 10, the high-pressure helium in the sealing test cavity penetrates into the tested part along the leakage position of the tested part, and is automatically detected by the probe head 93, so as to realize the leakage test of the part and automatically determine the leakage position.

[0026] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A brazing leakage testing device for automotive parts, comprising a test stand (1); characterized in that, The test stand (1) is movably connected to the loading and unloading conveying assembly (2) for synchronously clamping several parts to be tested. The test station of the test stand (1) is fixedly connected to a lower sealing seat (4) and an upper sealing seat (6) is movably connected in the vertical direction based on the guide pressing assembly (5). The lower sealing seat (4) and the upper sealing seat (6) form a sealed test cavity for accommodating the parts to be tested. Several sealing positioning assemblies (7) for positioning the parts to be tested and achieving sealing are uniformly fixedly connected to the lower sealing seat (4). A gas filling and recovery assembly (8) for injecting high-pressure helium into the sealed test cavity and recovering helium after the test is completed is fixedly provided on the upper sealing seat (6). A vacuum suction tube (10) for evacuating the inside of the parts and a helium detection assembly (9) for detecting helium are also fixedly connected inside the sealing positioning assembly (7).

2. The brazing leakage testing equipment for automotive parts according to claim 1, characterized in that, The loading and unloading conveying assembly (2) includes a horizontal screw conveying slide (21) fixedly connected to the test seat (1) along the loading direction of the part to be tested, and a horizontal conveying seat (22) fixedly connected to the sliding end of the horizontal screw conveying slide (21) along the horizontal direction. A lifting and unloading cylinder (23) is fixedly connected to the horizontal conveying seat (22) along the vertical direction to drive the clamping assembly (3) to lift and unload the material.

3. The automotive component brazing leakage testing equipment according to claim 2, characterized in that, The clamping assembly (3) includes a clamping mounting plate (31) fixedly connected to the telescopic end of the lifting and loading cylinder (23) along the horizontal direction, and a plurality of gripper cylinders (32) fixedly connected to the clamping mounting plate (31) at uniform intervals. The clamping end of the gripper cylinder (32) is fixedly connected to a clamping block (33) for clamping the parts.

4. The brazing leakage testing equipment for automotive parts according to claim 1, characterized in that, The guide clamping assembly (5) includes a vertical mounting base (51) fixedly connected to the test seat (1) in the vertical direction and a clamping cylinder (52) fixedly connected to the vertical mounting base (51) in the vertical direction for driving the upper sealing seat (6) to press down. A plurality of guide rods (53) are fixedly connected to the lower sealing seat (4) in the vertical direction, and a guide sleeve (54) that cooperates with the guide rods (53) is fixedly connected to the upper sealing seat (6).

5. The automotive component brazing leakage testing equipment according to claim 4, characterized in that, The upper end face of the lower sealing seat (4) is provided with a plurality of sealing grooves (55) arranged around the sealing test cavity, and a sealing ring (56) for ensuring the sealing performance of the sealing test cavity is fixedly connected in the sealing groove (55).

6. The brazing leakage testing equipment for automotive parts according to claim 1, characterized in that, The sealing and positioning assembly (7) includes a positioning rod (71) fixedly connected to the lower sealing seat (4) in the vertical direction for inserting into the part to be tested to achieve positioning of the part to be tested, and a sealing ring (72) fixedly connected to the lower sealing seat (4) for sealing the bottom of the part to be tested based on pressure, wherein the sealing ring (72) coincides with the axis of the positioning rod (71).

7. The automotive component brazing leakage testing equipment according to claim 6, characterized in that, The sealing ring (72) includes a flexible sealing base (721) fixedly connected to the lower sealing seat (4) and an inflation cavity (722) opened inside the flexible sealing base (721). The flexible sealing base (721) has a plurality of arc-shaped support blocks (723) for supporting the bottom of the part to be tested, which are evenly spaced along the circumferential direction at the bottom of the inflation cavity (722). The arc-shaped support blocks (723) form a channel for gas to flow in the inflation cavity (722). The flexible sealing substrate (721) is integrally connected to an outer abutment portion (724) for abutting against the outer shaft wall of the test part at one end away from the positioning rod (71), and an inner abutment portion (725) for abutting against the inner shaft wall of the test part at one end close to the positioning rod (71). The height of the outer abutment portion (724) is higher than the height of the inner abutment portion (725), and the pressure in the inflation chamber (722) is not higher than 1 / 3 of the pressure in the sealing test chamber.

8. The brazing leakage testing equipment for automotive parts according to claim 6, characterized in that, The helium detection assembly (9) includes a detection mounting frame (91) fixedly connected to the lower sealing seat (4) and a plurality of mounting rings (92) arranged in a stepped manner on the detection mounting frame (91) and corresponding to the brazing position of the part to be tested. The mounting rings (92) coincide with the axis of the positioning rod (71). At least three detection heads (93) for detecting helium are evenly spaced along the circumferential direction on the mounting rings (92).

9. The brazing leakage testing equipment for automotive parts according to claim 1, characterized in that, The gas filling and recovery assembly (8) includes a gas filling pipe (81) fixedly connected to the upper sealing seat (6) for filling high-pressure helium into the sealed test chamber and a recovery pipe (82) for discharging helium from the sealed test chamber after the test to achieve recovery. The gas filling pipe (81) and the recovery pipe (82) are externally connected to the helium storage tank (83). A gas filling pump (84) and a gas extraction pump (85) are fixedly connected to the gas filling pipe (81) and the recovery pipe (82) respectively.

10. The brazing leakage testing equipment for automotive parts according to claim 6, characterized in that, The test base (1) is also fixedly connected to an air blowing cleaning assembly (11) for blowing air to clean the inner and outer walls of the part to be tested before testing. The air blowing cleaning assembly (11) includes several first air blowing pipes (111) that are uniformly fixedly connected to the test base (1) for extending into the part to be tested to blow air to clean the inner wall of the part to be tested, and several second air blowing pipes (112) that are arranged around the first air blowing pipes (111) for blowing air to clean the outer wall of the part to be tested. The test base (1) is also fitted and fixedly connected to a cleaning felt (113) for adsorbing and cleaning impurities on the bottom surface of the part to be tested to avoid puncturing the sealing ring (72).

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