The new leakage test unit
The utility model relates to a kind of test unit, particularly a kind of Leak Off Test (LOT) device.
Leak Off Test (LOT) is perplexing testing crew always, and each normal breathable position will be blocked because Leak Off Test (LOT) must guarantee workpiece, otherwise test is not carried out.Most of workpiece of auto parts and components all require to do Leak Off Test (LOT) at present, but the product structure more complicated that has, and not merely through hole is many, sealing surface is also jagged, even the side also is open type, brings very large trouble to test, how carrying out smoothly of warranty test becomes a difficult point.
The utility model content
The utility model purpose is in order to overcome the deficiencies in the prior art, a kind of new leakage test unit to be provided, and it is by holding down assembly and the mating reaction of seal assembly, and the normal ventilative part good seal of warranty test workpiece can accurately be finished Leak Off Test (LOT).
In order to achieve the above object, the utility model is by the following technical solutions:
A kind of new leakage test unit comprises:
One frame, it comprises that a base plate and a level frame are located at the upper supporting plate of base plate top;
One location-plate is horizontally set on the described base plate, is provided with register pin and snorkel on it;
One holds down assembly, and its corresponding location-plate is arranged on described upper supporting plate; And
One seal assembly, its corresponding location-plate is arranged on the frame, comprises several plug components, a cover plate assembly and a seal base assembly.
As preferably, described plug component comprises a plug-hole cylinder and a plug, and described plug-hole cylinder is arranged on the frame, and the piston rod of plug and described plug-hole cylinder links.
As preferably, described cover plate assembly is corresponding to the rear end of location-plate, and it comprises sending and covers cylinder, a cover plate and some sealing strips; Described sending covered cylinder and is arranged on described upper supporting plate, described cover plate by connecting rod with send the piston rod that covers cylinder to link, it can move up and down, described some sealing strips are arranged on position corresponding to cover plate.
As preferably, described seal base assembly comprises a seal base, an O-ring seal and a sprue; The corresponding seal base of described location-plate is established a recess, and seal base embeds in this recess, and described O-ring seal is pressed in the gap of described seal base and location-plate, and described sprue is corresponding with O-ring seal to be located on the location-plate.
As preferably, described holding down assembly comprises at least one compressor arm and a cylinder, and described cylinder is arranged on described upper supporting plate, and described compressor arm connects with the piston rod of corresponding cylinder, and it can move up and down.
As preferably, described upper supporting plate is located at the base plate top by the some column level frames that are arranged on the base plate.
As preferably, described register pin is respectively circular register pin and diamond positioning pin.
Compared with prior art, the utlity model has following beneficial effect:
By location-plate and register pin positioning workpieces, and utilize the workpiece pressing that holds down assembly; Under plug component, cover plate assembly and seal base assembly three's sealing function, guarantee the normal ventilative part good seal of workpiece: thus Leak Off Test (LOT) is accurately finished.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model plan structure synoptic diagram;
Fig. 3 is the utility model cover plate decomposition texture synoptic diagram;
Fig. 4 is the utility model O-ring seal and gasket structure synoptic diagram.
Among the figure:
11-location-plate; 12-diamond positioning pin; 13-circular register pin; 21-plug-hole cylinder; 22-plug; 31-cover plate; 32-send and cover cylinder; 33-connecting rod; 34-sealing strip; 41-seal base; 42-sprue; 43-O-ring seal; 51-cylinder; The 52-compressor arm; The 6-snorkel; The 71-base plate; The 72-upper supporting plate; 73 columns;
Now the utility model is described in further detail with specific embodiment by reference to the accompanying drawings.
To shown in Figure 2, new leakage test unit described in the utility model comprises frame such as Fig. 1, and frame comprises base plate 71, and upper supporting plate 72 is located on the base plate 71 by some columns 73 level frames that are arranged on the base plate 71.Be horizontally disposed with location-plate 11 for positioning workpieces at base plate 71, and location-plate 11 is provided with circular register pin 13 and diamond positioning pin 12 and snorkel 6; Snorkel 6 is built in location-plate 11, and its mouth of pipe protrudes from location-plate 11 sidewalls and can be communicated with the inner chamber of the external world and workpiece, is mainly used in carrying gas to inside workpiece.
Be provided with cylinder 51 at upper supporting plate 72, the piston rod of cylinder 51 is connected with compressor arm 52, and described compressor arm 52 can move up and down under the driving of cylinder 51.Also be equipped with on the upper supporting plate 72 to send and cover cylinder 32, sending the piston rod that covers cylinder 32 to connect with cover plate 31 and drive cover plate 31 by connecting rod 33 moves up and down, the structure of cover plate 31 is installed two sealing strips 34 in the position of cover plate 31 corresponding workpiece as shown in Figure 3, and described sealing strip as shown in Figure 4; Described cover plate 31 is corresponding to the rear end of location-plate 11.
Be provided with three plugs 22, each plug 22 connects with the piston rod of corresponding plug-hole cylinder 21, and plug-hole cylinder 21 is provided with on the frame by support bar.
Location-plate 11 corresponding seal bases 41 are provided with recess, and seal base 41 embeds in this recess, and described O-ring seal 43 is pressed in the gap of described seal base 41 and location-plate 11, described sprue 42 and O-ring seal 43 corresponding being located on the location-plate 11.
In actual applications, workpiece is by location-plate 11 and circular register pin 13 and diamond positioning pin 12 location, and by compressor arm 52 compressions, each plug-hole cylinder 21 drives corresponding plug 22 and blocks the corresponding hole of workpiece.Cover plate 31 and the sealing strip 34 on it seal up the side of workpiece jointly, and seal base 41 and O-ring seal 43 seal up the bottom of workpiece jointly, and sprue 42 seals up the breach of workpiece, and described O-ring seal as shown in Figure 4.During work, compressor arm 52 is first Work-sheet pressing, good seal workpiece then, and air-flow enters the inner chamber that Work piece sealing is lived by snorkel, knows just by observation whether workpiece has the phenomenon of leakage.
The utility model is not limited to above-mentioned embodiment, if various changes of the present utility model or modification are not broken away from spirit and scope of the present utility model, if these are changed and modification belongs within claim of the present utility model and the equivalent technologies scope, then the utility model also is intended to comprise these changes and change.