CN113340534A

CN113340534A - Air tightness detection method

Info

Publication number: CN113340534A
Application number: CN202110753274.8A
Authority: CN
Inventors: 吴华; 徐振光; 马运曦; 徐海峰
Original assignee: Suzhou RS Technology Co Ltd
Current assignee: Suzhou RS Technology Co Ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-09-03

Abstract

The invention discloses an air tightness detection method, which comprises the following steps: step S1, providing a mounting bracket, and sequentially dividing the mounting bracket into a driving assembly space, a sealing film supply space and a pressing sealing space at intervals from top to bottom; step S2, providing a sealing film supplying module; step S3, providing a lifting driver, and connecting the power output end of the lifting driver with the sealing film supply module in a transmission way; step S4, providing a lower sealing assembly and an upper sealing assembly; step S5, the lifting driver drives the sealing film supply module to descend and simultaneously drives the upper sealing assembly to approach the lower sealing assembly; step S6, air tightness detection is performed. According to the invention, the automatic detection device has higher automation degree, so that the workpiece opening can be pressed and sealed while the workpiece is positioned, the detection steps are convenient and reasonable, and the detection efficiency is improved.

Description

Air tightness detection method

Technical Field

The invention relates to the field of nonstandard automation, in particular to an air tightness detection method.

Background

In the process of detecting the airtightness of a workpiece in the field of nonstandard automation equipment, it is known to adopt airtightness detection methods of different structural forms to realize airtightness detection. In the process of researching and realizing air tightness detection, researchers find that the air tightness detection method in the prior art has at least the following problems:

the automation degree is low, and the number of steps requiring manual intervention is large, so that the detection efficiency is low, and the airtightness performance is excessively misjudged due to the fact that the detection process is easily polluted by manpower; the detection steps are complicated, and the step process is unreasonable in design, so that the detection efficiency is further low.

In view of the above, it is necessary to develop a method for detecting air tightness to solve the above problems.

Disclosure of Invention

In order to overcome the problems of the air tightness detection method, the invention aims to provide the air tightness detection method which has higher automation degree, can perform press sealing on the opening of the workpiece while positioning the workpiece, is convenient and reasonable in detection steps and improves the detection efficiency.

As for the airtightness detection method, the airtightness detection method according to the present invention for solving the above-described technical problem includes:

step S1, providing a mounting bracket, and sequentially dividing the mounting bracket into a driving assembly space, a sealing film supply space and a pressing sealing space at intervals from top to bottom;

step S2, providing a sealing film supply module, installing the sealing film supply module in the sealing film supply space, and fixedly installing a down-pressure type sealing mechanism in the sealing film supply module;

step S3, providing a lifting driver, installing the lifting driver in the driving assembly space, and then connecting the power output end of the lifting driver with the sealing film supply module in a transmission way;

step S4, providing a lower sealing component and an upper sealing component, and installing the lower sealing component and the upper sealing component in the pressing sealing space, wherein the lower sealing component and the upper sealing component form a sealing mechanism;

and step S5, the lifting driver drives the sealing film supply module to descend and simultaneously drives the upper sealing assembly to be close to the lower sealing assembly, when the lower sealing assembly and the upper sealing assembly are combined to seal the workpiece opening so as to form a negative pressure space on the lower surface of the workpiece opening, the lower pressure type sealing mechanism drives the sealing pressure head to reciprocate along the vertical direction so as to push the sealing film below the sealing pressure head to the workpiece opening to be sealed in the pressing sealing space so as to form a sealing space on the upper surface of the workpiece opening, and the negative pressure space is right below the sealing space.

And step S6, providing an air tightness detector, enabling an air passage of the air tightness detector to be communicated with the negative pressure space of the position to be detected of the workpiece, and then carrying out air tightness detection to determine the air tightness of the opening of the workpiece.

Alternatively, the sealing film is arranged in step S2, and the sealing film is continuously supplied under tension at the sealing film supply module, and the push-down sealing mechanism is arranged right above the stepping path of the sealing film and the sealing ram in the push-down sealing mechanism is opposite to the sealing film below the push-down sealing mechanism.

Optionally, the sealing film supply module includes:

the mounting vertical plate is fixedly mounted on the lower pressure mounting plate; and

the sealing film winding device comprises a material discharging coil and a material collecting coil, wherein the material discharging coil and the material collecting coil are connected to a mounting vertical plate in a rotating mode, sealing films are wound on the material discharging coil, and the material collecting coil is used for winding the used sealing films;

the downward pressing type sealing mechanism is arranged between the material discharging roll and the material receiving roll.

Optionally, in step S2, sealing film guides are disposed on both sides of the push-down sealing mechanism, respectively upstream and downstream of the sealing film, and a sealing film guide groove with an open bottom is opened in the sealing film guides, and the sealing film passes through the push-down sealing mechanism under the guidance of the sealing film guide groove.

Optionally, the push-down sealing mechanism includes:

the downward pressing driver is fixedly arranged on the mounting vertical plate;

the mounting substrate is in transmission connection with the power output end of the press driver;

the pressure head mounting plate is fixedly mounted at the bottom of the mounting substrate; and

a sealing ram assembly slidably connected to the bottom of the ram mounting plate;

the pressure head mounting plate and the sealing pressure head assembly are in sliding connection through at least two guide rods; at least two linear bearings which move longitudinally are arranged between the pressure head mounting plate and the sealing pressure head assembly; at least two buffer components are elastically connected between the pressure head mounting plate and the sealing pressure head assembly; the mounting substrate is driven by the pressing driver to reciprocate along the vertical direction.

Optionally, the mounting bracket includes:

at least three lifting guide columns which are arranged in a non-collinear way;

the lower pressing mounting plate is movably sleeved on the lifting guide pillar; and

the fixed mounting plate and the bearing platform are fixedly connected to the top and the bottom of the lifting guide pillar respectively;

the downward pressing mounting plate is positioned below the fixed mounting plate and is arranged at a distance from the fixed mounting plate to form the sealing film supply space between the downward pressing mounting plate and the fixed mounting plate; the press-fit sealing space is formed between the press-fit mounting plate and the bearing platform; the driving assembly space is formed above the fixed mounting plate; the lower surface of the lower pressure mounting plate is provided with the upper sealing assembly; the bearing platform is provided with the lower sealing assembly.

Optionally, the push-down sealing mechanism includes:

One of the above technical solutions has the following advantages or beneficial effects: the workpiece opening pressing sealing device has high automation degree, so that the workpiece opening can be pressed down and sealed when the workpiece is positioned, the detection steps are convenient and reasonable, and the detection efficiency is improved.

One of the above technical solutions has the following advantages or beneficial effects: because the sealing film can be continuously released and the downward pressing sealing operation can be executed on the sealing film transmission path, the used sealing film can be continuously and automatically recovered, the automation degree and efficiency of sealing are greatly improved, and the high-efficiency execution of the sealing detection operation is facilitated.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting thereof, wherein:

fig. 1 is a perspective view of a airtightness detection apparatus according to an embodiment of the present invention;

fig. 2 is a front view of a proposed airtightness detection apparatus according to an embodiment of the present invention;

fig. 3 is a partial perspective view of a proposed airtightness detection apparatus according to an embodiment of the present invention;

fig. 4 is a perspective view of a bonding assembly in the air-tightness detecting device according to an embodiment of the present invention;

fig. 5 is a perspective view of a down-pressure type sealing mechanism in the airtightness detection apparatus according to one embodiment of the present invention;

fig. 6 is an exploded view of a down-pressure type sealing mechanism in the airtightness detection apparatus according to the embodiment of the present invention;

fig. 7 is a perspective view of a sealing head assembly in the airtightness detection apparatus according to one embodiment of the present invention;

fig. 8 is an exploded view of a sealing head assembly in the airtightness detection apparatus according to one embodiment of the present invention;

fig. 9 is a perspective view of the sealing ram assembly of the air-tightness testing device according to an embodiment of the present invention with the sealing ram and the ram holder concealed, in which the detail features of the ram accommodating groove can be shown from the bottom;

fig. 10 is a partial perspective view of a proposed airtightness detection apparatus according to an embodiment of the present invention;

fig. 11 is a perspective view of a lower seal assembly in the airtightness detection apparatus according to one embodiment of the present invention;

fig. 12 is a plan view of a lower seal assembly in the airtightness detection apparatus according to one embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along the line E-E in FIG. 12;

fig. 14 is a perspective view of a lateral positioning member of the airtightness detection apparatus according to one embodiment of the present invention;

fig. 15 is a front view of a lateral positioning member in the air-tightness detecting device according to one embodiment of the present invention;

fig. 16 is an exploded view of a lateral positioning member in the air-tightness detecting device according to an embodiment of the present invention;

FIG. 17 is a combined schematic view of a plurality of lateral positioning assemblies in combination for use in positioning a workpiece laterally in accordance with one embodiment of the present invention;

fig. 18 is an exploded view of an upper seal assembly in the airtightness detection apparatus according to one embodiment of the present invention;

fig. 19 is a sectional view of an upper sealing member in the airtightness detecting apparatus according to one embodiment of the present invention;

FIG. 20 is a longitudinal cross-sectional view of an upper seal armature and an upper seal ring in accordance with one embodiment of the present invention;

FIG. 21 is a perspective view of the upper seal assembly and the lower seal assembly shown assembled together to form a seal mechanism in accordance with one embodiment of the present invention;

fig. 22 is a longitudinal sectional view of an upper seal assembly and a lower seal assembly provided in accordance with an embodiment of the present invention after they are combined to form a seal mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.

Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Example 1

Fig. 1 to 6 show an embodiment 1 of the present invention, and in conjunction with the illustrations of fig. 1 to 2, it can be seen that the airtightness detection method 2 includes the following steps:

step S1, providing a mounting bracket 61, and dividing the mounting bracket 61 into a driving assembly space 618, a sealing film supplying space 617 and a press-fit sealing space 615 sequentially from top to bottom at intervals;

a step S2 of providing a sealing film supply module 63, installing the sealing film supply module 63 in the sealing film supply space 617, and fixedly installing a push-down type sealing mechanism 64 in the sealing film supply module 63;

step S3, providing a lifting driver 65, installing the lifting driver 65 in the driving assembly space 618, and then connecting the power output end of the lifting driver 65 with the sealing film feeding module 63 in a transmission manner;

step S4, providing a lower sealing assembly and an upper sealing assembly, and installing the lower sealing assembly and the upper sealing assembly in the press-fit sealing space 615, where the lower sealing assembly and the upper sealing assembly form the sealing mechanism 62;

in step S5, the lifting driver 65 drives the sealing film supply module 63 to descend and simultaneously drives the upper sealing assembly to approach the lower sealing assembly, and when the lower sealing assembly and the upper sealing assembly cooperate to seal the workpiece opening to form a negative pressure space on the lower surface of the workpiece opening, the downward-pressing type sealing mechanism 64 drives the sealing ram 645 therein to reciprocate and ascend and descend along the vertical direction so as to push the sealing film 634 below the sealing ram 645 onto the workpiece opening to be sealed in the press-fit sealing space 615 to form a sealing space on the upper surface of the workpiece opening, and the negative pressure space is directly below the sealing space.

Further, the sealing film 634 is disposed in step S2, and the sealing film 634 is continuously supplied in a tension manner to the sealing film supply module 63, and the push-down sealing mechanism 64 is disposed directly above the stepping path of the sealing film 634, and the sealing ram 645 of the push-down sealing mechanism 64 is opposed to the sealing film 634 therebelow.

Further, the sealing film supplying module 63 includes:

a mounting upright 631 fixedly mounted on the lower mounting plate 613; and

a material discharging roll 632 and a material receiving roll 633 which are connected to the mounting vertical plate 631 in a rotating mode, wherein a sealing film 634 is wound on the material discharging roll 632, and the used sealing film 634 is wound on the material receiving roll 633;

the down-pressure sealing mechanism 64 is disposed between the material-discharging roll 632 and the material-receiving roll 633.

Further, in step S2, sealing film guides 635 respectively located upstream and downstream of the sealing film 634 are disposed on both sides of the push-down sealing mechanism 64, a sealing film guide groove 6351 with an open bottom is opened in the sealing film guide 635, and the sealing film 634 passes directly below the push-down sealing mechanism 64 under the guidance of the sealing film guide groove 6351.

Further, the press-down type sealing mechanism 64 includes:

a press-down driver 641 fixedly mounted on the mounting upright plate 631;

a mounting substrate 642 which is in transmission connection with the power output end of the push-down actuator 641;

a ram mounting plate 643 fixedly mounted to the bottom of the mounting substrate 642; and

a sealing ram assembly slidingly coupled to a bottom of the ram mounting plate 643;

the pressure head mounting plate 643 and the sealing pressure head assembly are in sliding connection through at least two guide rods 6433; at least two linear bearings 6431 for longitudinal movement are disposed between the ram mounting plate 643 and the sealing ram assembly; at least two buffer components 6432 are elastically connected between the pressure head mounting plate 643 and the sealing pressure head assembly; the mounting substrate 642 is reciprocally lifted and lowered in a vertical direction by the driving of the push-down driver 641.

Further, the mounting bracket 61 includes:

at least three non-collinear lifting guide posts 616;

a lower press mounting plate 613 movably sleeved on the lifting guide post 616; and

a fixed mounting plate 614 and a bearing platform 612 fixedly connected to the top and the bottom of the lifting guide column 616 respectively;

wherein the push-down mounting plate 613 is positioned below the fixed mounting plate 614 and is spaced apart from the fixed mounting plate 614 to form the sealing film supplying space 617 therebetween; the press-fit sealing space 615 is formed between the lower press-fit plate 613 and the bearing platform 612; the drive assembly space 618 is formed above the fixed mounting plate 614; the lower surface of the lower pressure mounting plate 613 is provided with the upper seal assembly; the lower seal assembly is mounted on the load-bearing platform 612.

Further, the press-down type sealing mechanism 64 includes:

a press-down driver 641 fixedly mounted on the mounting upright plate 631;

Example 2

Fig. 1 to 6 show embodiment 2 of the present invention, and embodiment 2 is different from embodiment 1 in that an airtightness detection apparatus 6 is provided, and the airtightness detection apparatus 6 includes:

the mounting bracket 61, the mounting bracket 61 is sequentially provided with a driving assembly space 618, a sealing film supply space 617 and a pressing sealing space 615 at intervals from top to bottom;

a seal film supply module 63 installed in the seal film supply space 617, wherein a push-down type seal mechanism 64 is fixedly installed in the seal film supply module 63;

a lifting driver 65 installed in the driving assembly space 618, wherein the power output end of the lifting driver 65 is in transmission connection with the sealing film supply module 63; and

a lower sealing component and an upper sealing component which are arranged in the pressing sealing space 615 and form a sealing mechanism 62;

the height dimension of the pressing sealing space 615 can be enlarged or reduced along with the lifting driver 65 driving the sealing film supply module 63 to reciprocate, and simultaneously drives the lower sealing assembly to be combined with or separated from the upper sealing assembly; when the lower sealing assembly and the upper sealing assembly cooperate to form a seal on a part of the workpiece, the downward-pressing type sealing mechanism 64 drives the sealing ram 645 therein to reciprocate and lift in the vertical direction so as to push the sealing film 634 below the sealing ram 645 to the opening of the workpiece to be sealed in the press-fit sealing space 615.

Referring to fig. 2, the mounting bracket 61 includes:

at least three non-collinear lifting guide posts 616;

Referring to fig. 3 and 4, the sealing film supply module 63 is continuously supplied with the sealing film 634 in a tension manner, and the push-down sealing mechanism 64 is located right above the stepping path of the sealing film 634 such that the sealing ram 645 in the push-down sealing mechanism 64 is opposite to the sealing film 634 therebelow; when the sealing film supply module 63 descends to a preset position and the lower sealing assembly and the upper sealing assembly are combined to form a seal on a part of the workpiece, the downward-pressing type sealing mechanism 64 drives the sealing press head 645 therein to reciprocate and ascend along the vertical direction so as to push the sealing film 634 below the sealing press head 645 to the opening of the workpiece to be sealed in the press-fit sealing space 615.

Specifically, the sealing film supply module 63 includes:

a mounting upright 631 fixedly mounted on the lower mounting plate 613; and

the down-pressure sealing mechanism 64 is disposed between the material-discharging roll 632 and the material-receiving roll 633. Because the sealing film 634 can be continuously discharged and the downward pressing sealing operation can be executed on the transmission path of the sealing film 634, and the used sealing film can be continuously and automatically recovered, the automation degree and efficiency of sealing are greatly improved, and the high-efficiency execution of the sealing detection operation is facilitated. In the embodiment shown in fig. 4, the sealing film 634 is tensioned in an initial state to be in a horizontal posture (a solid line position in fig. 4), the sealing film 634 is bent downwards to be in a sealing state (a dotted line 634' position in fig. 4) after being subjected to downward pressure of the sealing ram 645, the sealing film 634 seals the workpiece opening at the lowest point in fig. 4, the sealing ram 645 is lifted and retracted after detection is completed, the sealing film 634 tends to return to the horizontal posture under the action of self tension and the winding tangential force of the material receiving roll 633, so that the sealing film 634 is automatically peeled off from the workpiece opening, the material receiving roll 633 is continuously wound, the used sealing film 634 is wound and recovered, the cleanliness of a workshop is ensured, a sealing station can be vacated, and the sealing detection work of the next workpiece is conveniently and rapidly prepared.

In the embodiment shown in fig. 4, the two sides of the push-down sealing mechanism 64 are provided with sealing film guides 635 respectively located at the upstream and downstream of the sealing film 634, a sealing film guide groove 6351 with an open bottom is opened in the sealing film guide 635, and the sealing film 634 passes through the push-down sealing mechanism 64 under the guidance of the sealing film guide groove 6351, so that the sealing film 634 can continuously and precisely pass through the workpiece opening to be sealed, and finally the sealing film 634 is pressed and attached to the workpiece opening, and the sealing film 634 does not have sealing failure due to misalignment.

As a further improvement, the bottom opening diameter of the sealing film guiding groove 6351 is gradually reduced from bottom to top and forms a sealing film accommodating groove 6352 slightly wider than the sealing film 634 at the top.

Referring to the illustrations of fig. 5 to 8, a specific structure of the press-down type seal mechanism 64 is disclosed, the press-down type seal mechanism 64 including:

a press-down driver 641 fixedly mounted on the mounting upright plate 631;

the pressure head mounting plate 643 and the sealing pressure head assembly are in sliding connection through at least two guide rods 6433; at least two linear bearings 6431 for longitudinal movement are disposed between the ram mounting plate 643 and the sealing ram assembly; at least two buffer components 6432 are elastically connected between the pressure head mounting plate 643 and the sealing pressure head assembly; the mounting substrate 642 is reciprocally lifted in the vertical direction by the down-pressure driver 641, thereby pushing the sealing film 634 under the sealing ram 645 onto the opening of the workpiece to be sealed.

With reference to fig. 4, as a further improvement, the guide rods 6433 are provided with an even number and are arranged so as to be constituted by at least one guide subset, each guide subset comprising a pair of guide rods 6433 arranged diagonally on the ram mounting plate 643. In the embodiment shown in fig. 5 and 6, the press-down sealing mechanism 64 further includes a press-down driver 641, and a power output end of the press-down driver 641 is in transmission connection with the mounting substrate 642, so that the mounting substrate 642 can be lifted and lowered back and forth in a vertical plane under the driving of the press-down driver 641.

As a further modification, the buffer members 6432 are provided with an even number and arranged to be constituted by at least one buffer subset each including a pair of buffer members 6432 arranged diagonally on the ram mounting plate 643, wherein a line between any pair of buffer members 6432 intersects a line between at least one pair of guide rods. Therefore, in the process of buffering compression, the shrinkage change degree of the space between the sealing head assembly and the pressure head mounting plate 643 can be kept consistent, and uneven pressing pressure finally transmitted to the sealing head assembly due to the fact that the sealing head assembly rolls over and/or inclines relative to the pressure head mounting plate 643 is prevented.

Fig. 5-6 show the specific structure of the sealing ram assembly:

the sealing ram assembly comprises:

a mounting base 644 slidably coupled to a bottom of the ram mounting plate 643, a mounting portion 6442 formed to extend downward in a downward hanging manner, and a ram accommodating groove 6445 having an open bottom formed in the mounting portion 6442; and

a sealing ram 645 engaged in the ram receiving groove 6445;

a replacement opening 6446 communicated with the outside is formed beside the pressure head accommodating groove 6445, and the sealing pressure head 645 enters and exits the pressure head accommodating groove 6445 through the replacement opening 6446 to complete the installation and replacement of the sealing pressure head 645.

Referring to fig. 5, the mounting base 644 has at least two relief recesses 6441 formed therein, each of the relief members 6432 being at least partially received in a corresponding one of the relief recesses 6441.

Referring to fig. 6, a ram retaining member 645 is detachably mounted to a side of the mounting portion 6442, and after the sealing ram 645 is mounted in the ram accommodating groove 6445, the ram retaining member 645 is mounted at a position opposite to the replacement port 6446 such that at least a portion of the ram retaining member 645 is retained against an exposed side surface of the sealing ram 645.

As a further modification, the ram abutting element 645 includes a fitting portion 6461 and an abutting portion 6462, and the size of the abutting portion 6462 is matched with the replacement port 6446 so that the abutting portion 6462 can intrude into the replacement port 6446.

As a further improvement, opposite side surfaces of the sealing ram 645 are respectively formed with protruding portions 6451, and the inside wall of the ram accommodating groove 6445 is formed with a catching groove 6447 extending from the replacement opening 6446 to the inside of the ram accommodating groove 6445, wherein the cross-sectional size of the catching groove 6447 is adapted to the cross-sectional size of the protruding portions 6451, so that each of the protruding portions 6451 can slide along a corresponding one of the catching grooves 6447 when the sealing ram 645 moves in and out of the ram accommodating groove 6445.

As a further improvement, a vacuum suction nozzle 6453 is formed at the bottom of the sealing ram 645, and a vacuum passage 6452 is extended into the mounting base 644 and communicated with the vacuum suction nozzle 6453.

As a further improvement, an exposed end of the vacuum air passage 6452 on the mounting base 644 is communicated with a vacuum generator 6443.

As a further improvement, a sealing layer made of elastic and/or flexible material is formed at the bottom of the sealing ram 645, so that when the sealing ram 645 performs a pressing operation, the product can be protected by buffering, and an excessive impact force can be prevented.

Referring to fig. 10 to 17, at least two parallel sliding guide rails 6121 are disposed on the bearing platform 612, the lower sealing assembly is slidably coupled to the sliding guide rails 6121, and a carrier driver 6123 in transmission connection with the lower sealing assembly is further disposed on the bearing platform 612; a feeding and discharging station 6126 and a sealing station 6125 are sequentially arranged on the sliding guide rail 6121 along the extension direction of the sliding guide rail 6121, and the lower sealing assembly is driven by the carrier driver 6123 to slide back and forth along the sliding guide rail 6121 so as to switch back and forth between the feeding and discharging station 6126 and the sealing station 6125. When the lower sealing assembly is located at the feeding and discharging station 6126, feeding operation is performed, after the feeding operation is completed, the carrier driver 6123 drives the lower sealing assembly to move to the sealing station 6125 for air tightness detection operation after the sealing operation is performed, and after the detection operation is completed, the lower sealing assembly returns to the feeding and discharging station 6126 again to perform discharging operation.

Further, the lower seal assembly includes:

a lower sealing mounting plate 624 slidably connected to said glide rail 6121, having a central portion 6241 formed thereon near the central region and lateral positioning slots 6242 arranged around said central portion 6241;

a plurality of lateral positioning assemblies 66 arranged in said lateral positioning slots 6242, said lateral positioning assemblies 66 being arranged so as to be made up of at least two lateral positioning subsets, each lateral positioning subset comprising a pair of oppositely disposed lateral positioning assemblies 66, a respective pair of lateral positioning assemblies 66 in each lateral positioning subset being disposed opposite one another;

at least three positioning nozzles 627 arranged in said central portion 6241; and

a first sealing ring 628 arranged at the edge of said central portion 6241 and enclosing said positioning nozzle 627 therein;

when a workpiece is placed in the area surrounded by the lateral positioning assembly 66, the workpiece is positioned to a preset position under the lateral positioning action of the lateral positioning assembly 66, then the positioning suction nozzle 627 performs suction positioning on the lower surface of the workpiece, and the first sealing ring 628 forms a seal with the lower surface of the workpiece.

Further, a lower blocking region 6281 corresponding to the workpiece opening is formed on the first sealing ring 628, and an air tightness detecting air passage 6243 leading to the top of the lower blocking region 6281 is opened in the lower sealing installation plate 624.

Further, a vacuum-pumping air passage 6244 is formed in the lower sealing mounting plate 624 to the positioning suction nozzle 627.

Further, the lateral positioning assembly 66 includes:

a side limit barrier 661 fixedly disposed in the lateral positioning slot 6242, on which a positioning through hole 662 penetrating through the upper and lower surfaces thereof is formed;

a positioning stopper 663 slidably provided in the positioning through-hole 662 in the vertical direction; and

a positioning return member 664 elastically supported on a lower surface of the positioning stopper 663;

the side surface of the positioning through hole 662 is opened with a lateral positioning slot 6621 communicated therewith, so that when the positioning block 663 is mounted in the lateral positioning slot 6621, at least the corresponding side surface of the positioning block 663 is exposed outwards from the lateral positioning slot 6621 and protrudes out of the corresponding side surface of the positioning block 663.

Further, the positioning stopper 663 includes:

a positioning body 6631 slidably coupled in the positioning through hole 662;

a blocking portion 6633 integrally formed at a side surface of the positioning main body 6631, the blocking portion 6633 being exposed to the outside through the lateral positioning groove 6621; and

a limiting portion 6632 fixedly connected to the bottom of the positioning main body 6631 and horizontally extending outwards along the X-axis direction;

the X axial width of the lateral positioning groove 6621 is smaller than the X axial width of the positioning main body 6631, and the X axial width of the positioning main body 6631 is larger than the X axial width of the lateral positioning groove 6621, so that the positioning main body 6631 cannot laterally displace through the lateral positioning groove 6621.

Further, a guide curved surface 6633 'smoothly transitioning to the inner side of the positioning through hole 662 is formed at the top of the blocking portion 6633 such that the thickness of the guide curved surface 6633' in the Y-axis direction is gradually increased in the top-to-bottom direction.

Therefore, in the positioning process, the guide curved surface 6633' can perform self-adaptive positioning on the workpiece within the set size range, and the positioning convenience is improved.

Further, the top of the positioning body 6631 protrudes at least partially upward to form a stopper portion 6634.

Further, at least two protruding ridges 6635 extending longitudinally are formed on the positioning main body 6631 on the side opposite to the lateral positioning groove 6621.

So that the frictional force between the positioning body 6631 and the positioning through-hole 662 can be reduced.

Further, be formed with on the spacing blend stop 661 of side and be located space 6622 of stepping down under locating hole 662, space 6622 of stepping down's X axle direction size is greater than locating hole 662X axle direction size. The relief space 6622 is used to provide a receiving space for the limit portion 6632 when the positioning and resetting component 664 is retracted.

Further, a second sealing ring 625 is disposed on the lower sealing mounting plate 624 and surrounds the lateral positioning assembly 66.

Further, the blocking portion 6633 is at least partially made of a soft and/or pliable material. To prevent damage to the workpiece after collision therewith.

Example 3

Fig. 18 to 20 illustrate embodiment 3 of the present invention, and embodiment 3 differs from embodiment 1 or embodiment 2 in that an upper seal assembly is illustrated, wherein the upper seal assembly includes:

an upper sealing mounting plate 621 fixedly mounted on the lower surface of the lower mounting plate 613, wherein an abdicating through-groove 6211 penetrating through the upper and lower surfaces thereof is formed so that the upper sealing mounting plate 621 is in an annular structure; and

an upper sealing framework 623 and an upper sealing ring 622 which are embedded in the lower surface of the upper sealing mounting plate 621 and arranged around the edge of the abdicating through groove 6211;

wherein, the lower surface of last sealed mounting panel 621 is seted up and is encircleed last sealed mounting groove 6212 that the edge of logical groove 6211 of stepping down arranged, go up sealed skeleton 623 detachably install in go up sealed mounting groove 6212, go up sealing washer 622 cover in go up sealed skeleton 623 and with go up sealed skeleton 623 concentric setting so that go up sealing washer 622 is in when going up sealed mounting groove 6212, go up sealing washer 622 be located go up sealed skeleton 623 with between the last sealed mounting panel 621.

When the upper sealing ring 622 is worn or the sealing ring matched with the upper sealing ring 622 needs to be replaced, the upper sealing framework 623 can be detached from the upper sealing installation groove 6212, and the original upper sealing ring 622 can be detached from the upper sealing framework 623 and then replaced with a new upper sealing ring 622.

As a further improvement, at least three connecting columns 6231 are disposed on the upper surface of the upper sealing framework 623, the connecting columns 6231 are disposed around the upper sealing framework 623, the upper sealing framework 623 is detachably connected to the upper sealing mounting plate 621 through the connecting columns 6231, and when the upper sealing ring 622 covers the upper sealing framework 623, a corresponding portion of the upper sealing ring 622 is sleeved on the connecting columns 6231.

As a further modification, a connecting through hole 6233 is formed in the connecting column 6231 to extend in the axial direction thereof, and the detachable connection with the upper seal mounting plate 621 is achieved by fitting a connecting member in the connecting through hole 6233.

As a further improvement, a guiding tangent plane 6232 arranged around a through hole is formed on the inner side of the upper surface of the upper sealing framework 623, the upper sealing ring 622 comprises a connecting section 6221, a transition section 6223, a suspension section 6222 and a sealing section 6224 which are connected in sequence from outside to inside, wherein when the upper sealing ring 622 covers the upper sealing framework 623, the connecting section 6221 is sleeved on the connecting column 6231, and the transition section 6223 is attached to the guiding tangent plane 6232.

The transition segment 6223 enables the overhanging segment 6222 to make a tangential transition, which can prevent premature failure of the joint between the overhanging segment 6222 and the connecting segment 6221 due to stress concentration during a long sealing operation, and can be clamped by the upper sealing skeleton 623 and the upper sealing mounting plate 621 more tightly to increase the contact area.

As a further improvement, the overhanging section 6222 depends downwardly from the bottom of the transition section 6223, and the sealing section 6224 extends radially from the inside of the bottom of the overhanging section 6222 to the inside of the through hole of the upper sealing skeleton 623 such that the lower surface of the sealing section 6224 is lower than the lower surface of the upper sealing skeleton 623.

So that the upper seal case 623 does not contact the seal face at the time of press-down sealing.

As a further improvement, the guide tangent plane 6232 forms an included angle α with the vertical direction, and the angle of the included angle α is 30 ° to 60 °.

As a further improvement, at least three lower guide posts 6212 are fixed to the lower surface of the upper sealing mounting plate 621 and arranged around the upper sealing frame 623 and the upper sealing ring 622.

As a further improvement, the upper sealing skeleton 623 is at least partially made of a rigid and/or stiff material. This enables upper seal skeleton 623 to provide stable support for upper seal ring 622.

As a further improvement, the upper seal ring 622 is at least partially made of a soft and/or pliable material. This allows the upper seal ring 622 to be adapted to deform according to the local dimensions of the sealing surface when applied to the sealing surface, thereby providing better sealing.

Example 4

Fig. 21 to 22 illustrate an embodiment 4 of the present invention, and the difference between the embodiment 4 and the embodiment 3 or the embodiment 2 or the embodiment 1 is that a sealing mechanism 62 is illustrated, the sealing mechanism 62 includes an upper sealing assembly and a lower sealing assembly which are arranged opposite to each other, and the upper sealing assembly includes:

an upper sealing mounting plate 621, wherein an abdicating through-groove 6211 is formed through the upper and lower surfaces of the upper sealing mounting plate 621 so that the upper sealing mounting plate 621 has an annular structure; and

the lower seal assembly includes:

a lower sealing mounting plate 624 having a central portion 6241 formed thereon proximate the central region and lateral positioning slots 6242 disposed about the central portion 6241;

when a workpiece is placed in the area surrounded by the lateral positioning assembly 66, the workpiece is positioned to a preset position under the lateral positioning action of the lateral positioning assembly 66, then the positioning suction nozzle 627 performs suction positioning on the lower surface of the workpiece, the first sealing ring 628 forms a seal on the lower surface of the workpiece, and then the upper sealing assembly is pressed down on the workpiece, so that the upper sealing ring 622 performs sealing on the periphery of the upper surface of the workpiece. The downward pressure provided by the upper seal assembly can further improve the sealing of the first seal ring 628 against the lower surface of the workpiece.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

The features of the different implementations described herein may be combined to form other embodiments not specifically set forth above. The components may be omitted from the structures described herein without adversely affecting their operation. Further, various individual components may be combined into one or more individual components to perform the functions described herein.

Furthermore, while embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in a variety of fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. The air tightness detection method is characterized by comprising the following steps of:

step S1, providing a mounting bracket (61), and dividing the mounting bracket (61) into a driving assembly space (618), a sealing film supply space (617) and a pressing sealing space (615) from top to bottom at intervals in sequence;

step S2, providing a sealing film supply module (63), installing the sealing film supply module (63) in the sealing film supply space (617), and fixedly installing a down-pressure type sealing mechanism (64) in the sealing film supply module (63);

step S3, providing a lifting driver (65), installing the lifting driver (65) in the driving assembly space (618), and then connecting the power output end of the lifting driver (65) with the sealing film supply module (63) in a transmission way;

step S4, providing a lower sealing component and an upper sealing component, and installing the lower sealing component and the upper sealing component in the pressing sealing space (615), wherein the lower sealing component and the upper sealing component form a sealing mechanism (62);

and step S5, the lifting driver (65) drives the sealing film supply module (63) to descend and simultaneously drives the upper sealing assembly to be close to the lower sealing assembly, when the lower sealing assembly and the upper sealing assembly are combined to seal the workpiece opening so as to form a negative pressure space on the lower surface of the workpiece opening, the lower pressure type sealing mechanism (64) drives the sealing pressure head (645) to reciprocate and lift along the vertical direction so as to push the sealing film (634) below the sealing pressure head (645) to the workpiece opening to be sealed in the pressing sealing space (615) so as to form a sealing space on the upper surface of the workpiece opening, and the negative pressure space is right below the sealing space.

2. The airtightness detection method according to claim 1, wherein in step S2, the sealing film (634) is disposed so that the sealing film (634) can be continuously supplied under tension at the sealing film supply module (63), and the lower-pressure sealing mechanism (64) is disposed directly above the step path of the sealing film (634) so that the sealing ram (645) in the lower-pressure sealing mechanism (64) is opposed to the sealing film (634) therebelow.

3. The airtightness detection method according to claim 2, wherein the sealing film supply module (63) comprises:

a mounting vertical plate (631) fixedly mounted on the lower mounting plate (613); and

a material discharging coil (632) and a material receiving coil (633) which are connected to the mounting vertical plate (631) in a rotating mode, a sealing film (634) is wound on the material discharging coil (632), and the used sealing film (634) is wound on the material receiving coil (633);

the downward pressing type sealing mechanism (64) is arranged between the material discharging roll (632) and the material collecting roll (633).

4. The airtightness detection method according to claim 2, wherein sealing film guides (635) located respectively upstream and downstream of the sealing film (634) are disposed on both sides of the push-down sealing mechanism (64) in step S2, a sealing film guide groove (6351) having an open bottom is opened in the sealing film guide (635), and the sealing film (634) passes directly below the push-down sealing mechanism (64) under the guidance of the sealing film guide groove (6351).

5. The airtightness detection method according to claim 2, wherein the press-down type sealing mechanism (64) comprises:

a press-down driver (641) fixedly mounted on the mounting vertical plate (631);

a mounting substrate (642) which is in transmission connection with a power output end of the push-down actuator (641);

a ram mounting plate (643) fixedly mounted to the bottom of the mounting substrate (642); and

a sealing ram assembly slidingly coupled to a bottom of the ram mounting plate (643);

the pressure head mounting plate (643) and the sealing pressure head assembly are in sliding connection through at least two guide rods (6433); at least two linear bearings (6431) moving longitudinally are arranged between the pressure head mounting plate (643) and the sealing pressure head assembly; at least two buffer parts (6432) are elastically connected between the pressure head mounting plate (643) and the sealing pressure head assembly; the mounting substrate (642) is driven by the press-down driver (641) to reciprocate up and down along a vertical direction.

6. The airtightness detection method according to claim 2, wherein the mounting bracket (61) comprises:

at least three non-colinear arranged lifting guide posts (616);

a downward pressing mounting plate (613) movably sleeved on the lifting guide post (616); and

a fixed mounting plate (614) and a bearing platform (612) which are respectively and fixedly connected with the top and the bottom of the lifting guide column (616);

wherein the hold-down mounting plate (613) is located below the fixed mounting plate (614) and spaced from the fixed mounting plate (614) to form the sealing film supply space (617) therebetween; the press fit sealing space (615) is formed between the lower press fit plate (613) and the bearing platform (612); the drive assembly space (618) is formed above the fixed mounting plate (614); the lower surface of the lower pressure mounting plate (613) is provided with the upper sealing assembly; the lower seal assembly is mounted on the load-bearing platform (612).

7. The airtightness detection method according to claim 6, wherein the press-down type sealing mechanism (64) comprises:

a press-down driver (641) fixedly mounted on the mounting vertical plate (631);