CN118310693A - Automatic test platform based on PLC - Google Patents

Abstract

The invention relates to the technical field of injection mold testing, and discloses an automatic test platform based on a PLC (programmable logic controller), which comprises a test table, wherein a test supporting seat is arranged above the test table and is elastically connected with the test table through a first spring, a sealing gasket is arranged on the test supporting seat, and the test supporting seat is in sliding connection with the test table through a connecting part; according to the invention, the expansion sealing plugs with adjustable positions are arranged, so that the injection molding dies with different hole positions can be sealed and detected, the application range is wider, when the dies with different hole diameters are detected, different positions change according to different weights of the dies, and the automatic air passage adjusting effect according to different types of workpieces to be detected can be achieved by matching the first limiting rod and the air inlet adjusting rod, so that the injection molding die with adjustable positions is more convenient to use.

Description

Automatic test platform based on PLC

Technical Field

The invention relates to the technical field of injection mold testing, in particular to an automatic testing platform based on PLC.

Background

Injection molds are a common manufacturing tool that is used primarily for manufacturing plastic injection molded products. It is composed of high-precision mould and mould support, and is used for making plastic products with various shapes and sizes, such as plastic cup, plastic plate, plastic toy and automobile parts. In an injection molding process, a mold is injected into molten plastic, and then solidified by a cooling process to form the desired plastic article. Injection molds play a critical role in modern manufacturing, and a series of tests are required after the injection molds are processed, wherein an airtight test is used for testing whether the injection molds leak air or not and judging whether the manufacturing precision of the injection molds is qualified or not.

In the prior art, an injection mold to be tested is placed on an automatic test platform for testing air tightness, the air tightness test result of the injection mold is determined by increasing the pressure of a cavity of the test mold and the actual air pressure change in the cavity of the test mold, when the air tightness of the mold with a plurality of holes is detected, the inlet and outlet of the holes are required to be sealed through plugs, then high-pressure air is filled into the holes through air pipes and maintained, and then the air pressure in the holes is detected through a pressure detection mechanism, so that the air tightness of the grinding tool is judged;

Each die is designed according to the processing object, so that the dies are basically not identical, the hole sites of different dies are different, and therefore, the automatic detection type is carried out, more obstruction is brought to detection equipment, so that the automatic detection equipment is caused, the automatic detection equipment can only detect one die, the application range is small, the universality is poor, and the detection cost is greatly increased.

Disclosure of Invention

The invention provides an automatic test platform based on a PLC, which has the advantages of wide application range, good universality and capability of reducing the detection cost, and solves the problems that in the prior art, each die is designed according to a generated object, so that basically no identical die exists, and different dies have different hole sites, so that the automatic detection can bring angle obstruction to detection equipment, one automatic detection equipment can only detect one die, the application range is small, the universality is poor, and the detection cost is greatly increased.

The invention provides the following technical scheme: the automatic test platform based on the PLC comprises a test table, wherein a test supporting seat is arranged above the test table and is elastically connected with the test table through a first spring, a sealing gasket is arranged on the test supporting seat, and the test supporting seat is in sliding connection with the test table through a connecting part;

The test bench top is provided with support arm and lift post respectively, just be provided with the drive assembly who is used for adjusting the lift post on the support arm, the bottom of lift post is provided with the roof, just the roof is connected with the strip shaped plate through a plurality of third spring elasticity, be provided with a plurality of inflation sealing plugs through second spring elastic connection on the strip shaped plate, be provided with test gas injection mouth and detection gas outlet on the roof respectively.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the transmission assembly comprises a servo motor, a gear and a rack, wherein the rack is fixedly connected with the side surface of the lifting column, the gear is rotationally connected with the supporting arm through a shaft rod, the gear is meshed with the rack, the servo motor is fixed on the supporting arm, and a motor shaft of the servo motor is in transmission connection with the shaft rod through a coupler.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the two sides of the adjusting lifting column are respectively provided with a guiding limiting groove, the supporting arm is connected with a guiding positioning rod in a threaded manner, and the end part of the guiding positioning rod is propped in the guiding limiting grooves.

As an alternative to the PLC-based automated test platform of the present invention, wherein: one side of the strip-shaped plate is fixed with a mounting frame, and the mounting frame is provided with an inflation assembly for supplying air to the expansion sealing plug.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the inflation assembly comprises an air cylinder, a piston rod, an extension rod, an air outlet hose and a first reset spring, wherein the air cylinder is fixedly connected with the mounting frame, the air cylinder is in sliding connection with the piston, the lower surface of the piston is fixedly connected with the upper end of the piston rod, the upper end of the extension rod is fixedly connected with the lower end of the piston rod, the air outlet hose is fixed on the air cylinder, one end of the air outlet hose is communicated with the air cylinder, the other end of the air outlet hose is connected with an air inlet adjusting rod, one side of the air inlet adjusting rod is fixedly connected with the mounting frame, the first reset spring is sleeved on the piston rod, two ends of the first reset spring are respectively abutted to the air cylinder and the end part of the piston rod, a third air passage is formed in the air inlet adjusting rod, and the air inlet adjusting rod is connected with a connecting rod through a sixth spring.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the utility model discloses a test bench, including connecting portion, second plug-in frame, connecting portion, piston rod, first stop lever, extension rod, second plug-in frame, connecting portion's below is fixed with the connecting plate, the one end symmetry of connecting plate is provided with the wedge, the upper and lower both sides of wedge are provided with first plug-in frame and second plug-in frame respectively, first plug-in frame with second plug-in frame all with testboard fixed connection, first plug-in frame sliding connection has first gag lever post, first gag lever post pass through the fourth spring with first plug-in frame elastic connection, the tip of piston rod pass through the extension with first gag lever post is relative, second plug-in frame sliding connection has the second gag lever post, the second gag lever post pass through the fifth spring with second gag lever post elastic connection, the second gag lever post with the extension rod is relative.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the expansion sealing plug is characterized in that a first expansion ring and a second expansion ring are sequentially arranged on the outer side surface of the expansion sealing plug from top to bottom, a fourth air passage and a fifth air passage are respectively arranged in the expansion sealing plug, the fourth air passage is communicated with the first expansion ring, the fifth air passage is communicated with the second expansion ring, and the diameter of the first expansion ring is larger than that of the second expansion ring.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the top plate is fixedly provided with a ventilation strip, the upper end of the air inlet adjusting rod is elastically connected with the ventilation strip through a second reset spring, a first air passage and a second air passage are respectively arranged in the ventilation strip, the first air passage is communicated with the fourth air passage through a first connecting hose, the second air passage is communicated with the fifth air passage through a second connecting hose, the ventilation strip is in sliding connection with the air inlet adjusting rod, and the third air passage is respectively matched with the first air passage and the second air passage.

As an alternative to the PLC-based automated test platform of the present invention, wherein: one side of the fourth air passage and one side of the fifth air passage are respectively communicated with a pressure relief valve and an exhaust valve, the exhaust valve is provided with a vertical telescopic valve rod, and the fourth air passage and the fifth air passage are respectively connected with a one-way valve.

As an alternative to the PLC-based automated test platform of the present invention, wherein: the test bench internally mounted has the PLC controller, detect and install pressure sensor on the gas outlet, the PLC controller pass through the wire respectively with pressure sensor and servo motor electric connection.

The invention has the following beneficial effects:

1. According to the automatic test platform based on the PLC, the sealing gasket is arranged on the test supporting seat to place the tested injection mold, when the transmission assembly operates, the top plate and the strip plate below the lifting column can be driven to move vertically, so that the purpose of adjusting the position of the expansion sealing plug is achieved, holes on the injection mold can be sealed through the expansion sealing plug, a plurality of expansion sealing plugs with adjustable positions are arranged on the strip plate, when the injection mold with different hole positions faces, if the positions of the expansion sealing plugs correspond to the holes, the expansion sealing plugs can be inserted into the holes, if the positions of the expansion sealing plugs do not correspond to the holes, the expansion sealing plugs are in contact with the surface of the injection mold, and because the expansion sealing plugs are in elastic connection with the strip plate, the non-corresponding expansion sealing plugs can not interfere the descending of the strip plate.

2. According to the automatic testing platform based on the PLC, by arranging the expansion sealing plugs with the expansion rings with different expansion volumes, when the injection molds with different hole diameters are met, the first expansion ring or the second expansion ring expands, so that the effect of sealing different holes can be achieved; specifically, an inflation assembly matched with the expansion sealing plug is arranged at the strip-shaped plate, and the inflation assembly can be automatically inflated and deflated under the drive of the strip-shaped plate along with the lifting of the strip-shaped plate, and when the inflation assembly is inflated, the inflation assembly can promote the first expansion ring or the second expansion ring to expand;

According to the technical scheme, the inflation assembly is arranged at the strip-shaped plate, the first expansion ring or the second expansion ring can be inflated or deflated by utilizing the linkage of the inflation assembly and the strip-shaped plate, and holes with different apertures can be sealed by utilizing expansion rings with different expansion degrees, so that the application range and the universality of the inflation device are further improved.

3. The automatic test platform based on the PLC can supply air for different expansion rings by arranging the ventilation strips with a plurality of air passages, can achieve the effect of supplying air for different expansion rings by adjusting the air passages, can automatically complete the conversion of the air passages without any electric control equipment, and has the following specific contents,

By arranging a test supporting seat with adjustable height on the test bench, after different dies to be tested are placed on the test supporting seat by utilizing the characteristic that the weights of the dies to be tested are different, the heights of the test supporting seats are different, a first limiting rod matched with the test supporting seat is arranged on the side edge of the test bench, when the test supporting seat is positioned at the highest position, the first limiting rod can be promoted to extend, at the moment, the connecting rod is pushed against the first limiting rod, and then the air inlet adjusting rod and the ventilation strip can be promoted to slide relatively, so that the effect of switching different air channels is achieved, and when the test supporting seat is positioned at the middle part or the lowest position, the position is unchanged;

According to the application, the test support seat with the adjustable position is arranged, when the moulds with different apertures are detected, different positions change according to different weights of the moulds, and the effect of automatically adjusting the air passage according to different types of workpieces to be detected can be achieved by matching the first limiting rod and the air inlet adjusting rod, so that the automatic air passage detection device is more convenient to use.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a second schematic diagram of the structure of the present invention.

FIG. 3 is a third schematic diagram of the structure of the present invention.

Fig. 4 is a cross-sectional view of the pump assembly and vent strip of the present invention.

Fig. 5 is a cross-sectional view of a first and second cartridge frame structure according to the present invention.

Fig. 6 is a cross-sectional view of an expansion seal plug structure of the present invention.

Fig. 7 is a partially enlarged schematic view of fig. 3 at a.

In the figure: 1. a test bench; 2. a test support seat; 3. a first spring; 4. a sealing gasket; 5. a support arm; 6. lifting columns; 7. a PLC controller; 8. a top plate; 9. expanding and sealing the plug; 91. a first expansion loop; 92. a second expansion loop; 93. a fourth airway; 94. a fifth air passage; 10. a second spring; 11. testing the gas injection port; 12. detecting an air outlet; 13. a servo motor; 14. a gear; 15. a rack; 16. a shaft lever; 17. a guide limit groove; 18. a guide positioning rod; 19. a third spring; 20. a strip-shaped plate; 21. a mounting frame; 22. an air cylinder; 23. a piston; 24. a piston rod; 25. an extension bar; 26. an air outlet hose; 27. a first connection hose; 28. an air inlet adjusting rod; 29. a connecting plate; 30. wedge blocks; 31. a first cartridge; 32. a second cartridge; 33. a first stop lever; 3301. a fourth spring; 34. a second limit rod; 3401. a fifth spring; 35. a ventilation strip; 36. a first airway; 37. a second airway; 38. a second connection hose; 39. a third airway; 40. a pressure release valve; 41. an exhaust valve; 42. a one-way valve; 43. a telescoping valve stem; 44. a pressure sensor; 45. a connection part; 46. a first return spring; 47. an extension; 48. a sixth spring; 49. a connecting rod; 50. and a second return spring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1 to 7, an automatic testing platform based on PLC includes a testing table 1, a testing support seat 2 is disposed above the testing table 1, the testing support seat 2 is elastically connected with the testing table 1 through a first spring 3, a sealing pad 4 is disposed on the testing support seat 2, and the testing support seat 2 is slidably connected with the testing table 1 through a connecting portion 45;

The test bench 1 top is provided with support arm 5 and lift post 6 respectively, and is provided with the drive assembly who is used for adjusting lift post 6 on the support arm 5, and the bottom of lift post 6 is provided with roof 8, and roof 8 is through a plurality of third spring 19 elastic connection having strip shaped plate 20, is provided with a plurality of inflation sealing plugs 9 through second spring 10 elastic connection on the strip shaped plate 20, is provided with test gas injection port 11 and detects gas outlet 12 on the roof 8 respectively.

The transmission assembly comprises a servo motor 13, a gear 14 and a rack 15, wherein the rack 15 is fixedly connected with the side surface of the lifting column 6, the gear 14 is rotationally connected with the supporting arm 5 through a shaft lever 16, the gear 14 is meshed with the rack 15, the servo motor 13 is fixed on the supporting arm 5, and a motor shaft of the servo motor 13 is in transmission connection with the shaft lever 16 through a coupler.

Guide limit grooves 17 are respectively formed in two sides of the adjusting lifting column 6, guide positioning rods 18 are connected to the supporting arms 5 in a threaded mode, and the end portions of the guide positioning rods 18 are abutted to the guide limit grooves 17.

When the injection mold performs airtight test, the workpiece to be tested is placed on the test supporting seat 2, the servo motor 13 arranged in the transmission assembly is in transmission connection with the coupler, output power is transmitted to the shaft lever 16 to drive the gear 14 to rotate, as the gear rack 15 is fixed on the lifting column 6, when the gear 14 is meshed with the gear rack 15, the lifting column 6 is driven to vertically move up and down, the top plate 8, the strip plate 20, the plurality of expansion sealing plugs 9, the test gas injection port 11, the detection gas outlet 12 and the inflator 22 can be adjusted to vertically move at the same time, the plurality of expansion sealing plugs 9 can be abutted against the surface of the injection mold, when the expansion sealing plugs 9 are matched with corresponding holes, the expansion sealing plugs 9 can be inserted into the holes, part of the expansion sealing plugs 9 cannot correspond to the holes, then the second spring 10 is driven to move upwards, the expansion sealing plugs 9 which can avoid interference to the rest work are avoided, the problem that in the prior art, holes of different molds are faced with different positions can be automatically plugged by the expansion sealing plugs 9,

The other two holes of the injection mold can be plugged through the test gas injection port 11 and the test gas outlet 12 arranged on the top plate 8, a test gas source is injected into the injection mold through the test gas injection port 11, the internal pressure gradually increases along with the increase of the injection quantity, the internal pressure in the injection mold is observed in real time through the pressure sensor 44 arranged on the test gas outlet 12, then the airtight effect of the injection mold is conveniently observed, the airtight detection result is obtained, the application range of different injection molds for plugging the holes in airtight test is greatly improved, and the problems that the universality of the prior art is poor and the detection cost is greatly increased are solved.

Through adjusting the guide limiting groove 17 that the both sides of lift post 6 were offered respectively, can carry out the block with the guide locating lever 18 of threaded connection on the support arm 5, at the lift post 6 of adjusting at the removal in-process, ensured the steady performance of adjusting the vertical removal of lift post 6, secondly can restrict the lift height of adjusting lift post 6, avoid appearing lift post 6 and drop the phenomenon, improve the security performance of using.

Example two

The present embodiment is explained based on the first embodiment, specifically, referring to fig. 1 to 7, a mounting frame 21 is fixed on one side of the strip-shaped plate 20, and the mounting frame 21 is provided with an air charging assembly for supplying air to the expansion seal plug.

The inflation assembly comprises an air cylinder 22, a piston 23, a piston rod 24, an extension rod 25, an air outlet hose 26 and a first reset spring 46, wherein the air cylinder 22 is fixedly connected with the mounting frame 21, the air cylinder 22 is in sliding connection with the piston 23, the lower surface of the piston 23 is fixedly connected with the upper end of the piston rod 24, the upper end of the extension rod 25 is fixedly connected with the lower end of the piston rod 24, the air outlet hose 26 is fixed on the air cylinder 22, one end of the air outlet hose 26 is communicated with the air cylinder 22, the other end of the air outlet hose 26 is connected with an air inlet adjusting rod 28, one side of the air inlet adjusting rod 28 is fixedly connected with the mounting frame 21, the first reset spring 46 is sleeved on the piston rod 24, two ends of the first reset spring 46 are respectively abutted against the end parts of the air cylinder 22 and the piston rod 24, a third air passage 39 is formed in the air inlet adjusting rod 28, and the air inlet adjusting rod 28 is connected with a connecting rod 49 through a sixth spring 48.

The connecting plate 29 is fixed with the below of connecting portion 45, the one end symmetry of connecting plate 29 is provided with wedge 30, the upper and lower both sides of wedge 30 are provided with first cartridge frame 31 and second cartridge frame 32 respectively, first cartridge frame 31 and second cartridge frame 32 all are with test bench 1 fixed connection, sliding connection has first gag lever post 33 in first cartridge frame 31, first gag lever post 33 passes through fourth spring 3301 and first cartridge frame 31 elastic connection, the tip of piston rod 24 is relative with first gag lever post 33 through extension 47, sliding connection has second gag lever post 34 in second cartridge frame 32, second gag lever post 34 passes through fifth spring 3401 and second gag lever post 34 elastic connection, second gag lever post 34 is relative with extension 25.

The outer side surface of the expansion sealing plug 9 is sequentially provided with a first expansion ring 91 and a second expansion ring 92 from top to bottom, a fourth air passage 93 and a fifth air passage 94 are respectively arranged in the expansion sealing plug 9, the fourth air passage 93 is communicated with the first expansion ring 91, the fifth air passage 94 is communicated with the second expansion ring 92, and the diameter of the first expansion ring 91 is larger than that of the second expansion ring 92.

The top plate 8 is fixedly provided with a ventilation strip 35, the upper end of the air inlet adjusting rod 28 is elastically connected with the ventilation strip 35 through a second reset spring 50, the ventilation strip 35 is respectively provided with a first air passage 36 and a second air passage 37, the first air passage 36 is communicated with a fourth air passage 93 through a first connecting hose 27, the second air passage 37 is communicated with a fifth air passage 94 through a second connecting hose 38, the ventilation strip 35 is slidably connected with the air inlet adjusting rod 28, and the third air passage 39 is respectively matched with the first air passage 36 and the second air passage 37.

The hole diameter of the inner hole of the injection mold is small, so that the weight of the injection mold is large, the weight of the injection mold can drive the first spring 3 of the test supporting seat 2 to compress, thereby adjusting the sliding distance of the connecting part 45 on the test bench 1, automatically adjusting the moving height of the connecting plate 29, simultaneously, the wedge-shaped block 30 symmetrically arranged at one end of the connecting plate 29 can be automatically selected to be inserted into the first inserting frame 31 or the second inserting frame 32 according to the weight of the injection mold, when the hole diameter of the injection mold is large, the wedge-shaped block 30 is inserted into the first inserting frame 31, at the moment, the first limiting rod 33 is in contact with the inclined surface of the wedge-shaped block 30, the stress influences the outer side to move under the cooperation of the fourth spring 3301, the extending part 47 at the end part of the connecting rod 49 and the piston rod 24 are opposite to each other, and when the servo motor 13 works, the lifting column 6 is driven to vertically move downwards, so that the strip-shaped plate 20, the expansion sealing plugs 9 and the air cylinders 22 fixed in the mounting frame 21 vertically move downwards synchronously, linkage is realized, the extension parts 47 at the end parts of the connecting rods 49 and the piston rods 24 are in conflict with the first limiting rods 33, the air inlet adjusting rods 28 and the pistons 23 can be synchronously driven to move, the pistons 23 can compress air in the air inlet adjusting rods 28, the air inlet adjusting rods 28 flow into the third air passages 39 in the air inlet adjusting rods 28 through the air outlet hoses 26, the upper ends of the air inlet adjusting rods 28 bear force, the upper ends of the air inlet adjusting rods can slide in the air guide rods 35 through the sealing rings, the air passage conversion between the third air passages 39 of the air inlet adjusting rods 28 and the first air passages 36 and the second air passages 37 can be realized, meanwhile, the connecting rods 49 extend the telescopic distance under the cooperation of the sixth springs 48, the circulation time and the circulation flux of compressed air are increased, at this time, the third air passage 39, the first air passage 36, the first connection hose 27 and the fourth air passage 93 are communicated, so as to control the expansion amplitude of the first expansion ring 91;

When the aperture of the injection mold is small, the wedge-shaped block 30 at the lower side of the connecting plate 29 can be driven to be inserted into the second insertion frame 32 and is abutted against the second limiting rod 34, the second limiting rod 34 is compressed by the fifth spring 3401 to extend outwards and is opposite to the extension rod 25 connected with the lower end of the piston rod 24, the servo motor 13 drives the adjusting lifting column 6 to vertically move downwards when working, so that the strip-shaped plate 20, the plurality of expansion sealing plugs 9 and the air cylinder 22 fixed in the mounting frame 21 vertically move downwards synchronously, linkage is realized, the extension rod 25 is stressed, the piston rod 24 drives the piston 23 to slide in the air cylinder 22, generated compressed air flows into the third air passage 39 in the air inlet adjusting rod 28 through the air outlet hose 26, meanwhile, the second reset spring 50 can automatically control the reset distance of the air inlet adjusting rod 28, so that the air inlet adjusting rod 28 slides in the air vent rod 35, the third air passage 39 is respectively communicated with the second air passage 37, the second connecting hose 38 and the fifth air passage 94, air passage conversion is completed again, compressed air flows into the second expansion ring 92 conveniently, the expansion diameter of the second expansion ring 92 is controlled, the air passage is automatically converted according to the weight of the injection mold through linkage with the test supporting seat 2, the expansion amplitude of the first expansion ring 91 and the second expansion ring 92 can be controlled, the diameter of plugging is changed, the plugging flexibility and practicability of holes with different apertures are greatly improved, the holes with different apertures are plugged, the effect of automatic adjustment can be achieved, the investment of electric equipment can be effectively reduced when the injection mold performs airtight test, and the purposes of saving electric power energy and reducing input cost and saving energy and protecting environment are achieved.

Through the first return spring 46 sleeved on the piston rod 24, after the piston 23 compresses the gas, the piston rod 24 is driven to move downwards to return by the acting force of the first return spring 46, so that preparation is conveniently made for the next gas compression.

Example III

The present embodiment is explained based on the first embodiment, and in detail, referring to fig. 1 to 7,

One side of the fourth air passage 93 and one side of the fifth air passage 94 are respectively communicated with a pressure release valve 40 and an exhaust valve 41, a vertical telescopic valve rod 43 is arranged on the exhaust valve 41, and the fourth air passage 93 and the fifth air passage 94 are respectively connected with a one-way valve 42.

The test bench 1 internally mounted has the PLC controller 7, detects and installs pressure sensor 44 on the gas outlet 12, and the PLC controller 7 passes through the wire and respectively with pressure sensor 44 and servo motor 13 electric connection.

Through the pressure release valve 40 communicated with the fourth air passage 93 and the fifth air passage 94, when the pressure of the compressed air is high, redundant air pressure in the fourth air passage 93 and the fifth air passage 94 can be automatically released, the internal air pressure is reduced, the residual compressed air pressure meets the expansion requirements of the second expansion ring 92 and the first expansion ring 91, the influence of high air pressure in the expansion process of the second expansion ring 92 and the first expansion ring 91 is reduced, and the service lives of the second expansion ring 92 and the first expansion ring 91 are guaranteed;

Because after the injection mold is airtight, the expansion sealing plug 9 needs to be separated from the sealed hole, in order to prevent the air pressure inside the second expansion ring 92 and the first expansion ring 91 from being unable to be released, when the expansion sealing plug 9 cannot be taken out, under the cooperation of the servo motor 13, the top plate 8 fixed at the bottom of the lifting column 6 is driven to apply an upward force, so that the second spring 10 rebounds, the strip plate 20 can be driven to move upwards, when the telescopic valve rod 43 of the exhaust valve 41 collides with the rebounded strip plate 20, the telescopic valve rod 43 moves upwards, the sealing valve core of the exhaust valve 41 can be pushed, the air pressure can be released instantaneously, the expansion volumes of the second expansion ring 92 and the first expansion ring 91 are reduced, the separation from the circulation hole is facilitated, and in order to ensure the stability of the pressure inside the expansion sealing plug 9, the check valve 42 is arranged on the fourth air passage 93 and the fifth air passage 94, the internal compressed air backflow direction of the first connecting hose 27 and the second connecting hose 38 can be limited by the check valve 42, and the volume expansion effect of the first expansion ring 92 can be ensured.

Through PLC controller 7 can carry out electric connection through wire and the test end of pressure sensor 44 and servo motor 13, but the test data of automatic acquisition pressure sensor 44 to and the running condition of control servo motor 13, when test platform can automatic operation, improve test platform airtight detection's practical effect.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims (10)

1. An automatic test platform based on PLC, includes testboard (1), its characterized in that: a test supporting seat (2) is arranged above the test table (1), the test supporting seat (2) is elastically connected with the test table (1) through a first spring (3), a sealing gasket (4) is arranged on the test supporting seat (2), and the test supporting seat (2) is in sliding connection with the test table (1) through a connecting part (45);

The test bench (1) top is provided with support arm (5) and lift post (6) respectively, just be provided with the drive assembly who is used for adjusting lift post (6) on support arm (5), the bottom of lift post (6) is provided with roof (8), just roof (8) are through a plurality of third spring (19) elastic connection strip shaped plate (20), be provided with a plurality of inflation sealing plugs (9) through second spring (10) elastic connection on strip shaped plate (20), be provided with test gas injection mouth (11) and detection gas outlet (12) on roof (8) respectively.

2. The PLC based automated test platform of claim 1, wherein: the transmission assembly comprises a servo motor (13), a gear (14) and a rack (15), wherein the rack (15) is fixedly connected with the side surface of the lifting column (6), the gear (14) is rotationally connected with the supporting arm (5) through a shaft rod (16), the gear (14) is meshed with the rack (15), the servo motor (13) is fixed on the supporting arm (5), and a motor shaft of the servo motor (13) is in transmission connection with the shaft rod (16) through a coupler.

3. The PLC based automated test platform of claim 1, wherein: guide limit grooves (17) are respectively formed in two sides of the adjusting lifting column (6), guide locating rods (18) are connected to the supporting arms (5) in a threaded mode, and the end portions of the guide locating rods (18) are abutted to the inside of the guide limit grooves (17).

4. The PLC based automated test platform of claim 1, wherein: one side of the strip-shaped plate (20) is fixed with a mounting frame (21), and the mounting frame (21) is provided with an inflation assembly for supplying air to the expansion sealing plug.

5. The PLC based automated test platform of claim 4, wherein: the inflation assembly comprises an air cylinder (22), a piston (23), a piston rod (24), an extension rod (25), an air outlet hose (26) and a first reset spring (46), wherein the air cylinder (22) is fixedly connected with a mounting frame (21), the air cylinder (22) is in sliding connection with the piston (23), the lower surface of the piston (23) is fixedly connected with the upper end of the piston rod (24), the upper end of the extension rod (25) is fixedly connected with the lower end of the piston rod (24), the air outlet hose (26) is fixed on the air cylinder (22), one end of the air outlet hose (26) is communicated with the air cylinder (22), the other end of the air outlet hose (26) is connected with an air inlet adjusting rod (28), one side of the air inlet adjusting rod (28) is fixedly connected with the mounting frame (21), the first reset spring (46) is sleeved on the piston rod (24), two ends of the first reset spring (46) are respectively abutted to the air cylinder (22) and the end of the piston rod (24), and a third air inlet adjusting rod (28) is connected with a sixth air inlet adjusting rod (49).

6. The PLC based automated test platform of claim 5, wherein: the utility model discloses a test bench, including connecting portion (45), connecting portion (45), wedge (30) are provided with to the one end symmetry of connecting plate (29), the upper and lower both sides of wedge (30) are provided with first cartridge frame (31) and second cartridge frame (32) respectively, first cartridge frame (31) with second cartridge frame (32) all with testboard (1) fixed connection, sliding connection has first gag lever post (33) in first cartridge frame (31), first gag lever post (33) through fourth spring (3301) with first cartridge frame (31) elastic connection, the tip of piston rod (24) through extension (47) with first gag lever post (33) are relative, sliding connection has second gag lever post (34) in second cartridge frame (32), second gag lever post (34) through fifth spring (3401) with second gag lever post (34) elastic connection, second gag lever post (25) are relative.

7. The PLC based automated test platform of claim 6, wherein: the expansion sealing plug (9) is characterized in that a first expansion ring (91) and a second expansion ring (92) are sequentially arranged on the outer side surface of the expansion sealing plug (9) from top to bottom, a fourth air passage (93) and a fifth air passage (94) are respectively arranged in the expansion sealing plug (9), the fourth air passage (93) is communicated with the first expansion ring (91), the fifth air passage (94) is communicated with the second expansion ring (92), and the diameter of the first expansion ring (91) is larger than that of the second expansion ring (92).

8. The PLC based automated test platform of claim 7, wherein: the novel air conditioner is characterized in that an air ventilation strip (35) is fixed on the top plate (8), the upper end of the air inlet adjusting rod (28) is elastically connected with the air ventilation strip (35) through a second reset spring (50), a first air passage (36) and a second air passage (37) are respectively arranged in the air ventilation strip (35), the first air passage (36) is communicated with the fourth air passage (93) through a first connecting hose (27), the second air passage (37) is communicated with the fifth air passage (94) through a second connecting hose (38), the air ventilation strip (35) is in sliding connection with the air inlet adjusting rod (28), and the third air passage (39) is matched with the first air passage (36) and the second air passage (37) respectively.

9. The PLC based automated test platform of claim 8, wherein: one side of the fourth air passage (93) and one side of the fifth air passage (94) are respectively communicated with a pressure release valve (40) and an exhaust valve (41), a vertical telescopic valve rod (43) is arranged on the exhaust valve (41), and the fourth air passage (93) and the fifth air passage (94) are respectively connected with a one-way valve (42).

10. The PLC based automated test platform of claim 2, wherein: the test bench (1) internally mounted has PLC controller (7), install pressure sensor (44) on detecting gas outlet (12), PLC controller (7) pass through the wire respectively with pressure sensor (44) and servo motor (13) electric connection.