CN111469431B

CN111469431B - Automatic assembling device for filter

Info

Publication number: CN111469431B
Application number: CN202010285419.1A
Authority: CN
Inventors: 杨绪剑; 孙新群
Original assignee: Weihai Saiwei Intelligent Technology Co ltd
Current assignee: Weihai Saiwei Intelligent Technology Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2022-02-22
Anticipated expiration: 2040-04-13
Also published as: CN111469431A

Abstract

The invention discloses an automatic filter assembling device which comprises a rack (1), and a filtering membrane feeding device (21), a bottom membrane feeding device (22), a double-layer thin film compounding device (23), a double-layer thin film stepping feeding device (24), a filtering membrane punching and picking device (3), a filter conveying device (4), a filter welding device (5) and a filter blanking device (6) which are positioned on the rack (1), wherein the devices are matched to work so as to complete the assembly of a filter. Compared with the prior art, the automatic filter assembling device can automatically assemble the filter, has the advantages of high automation degree, high product assembling precision, more complete and more comfortable membrane obtained by punching, membrane sucking and assembling in one go, and prevention of membrane sucking deviation.

Description

Automatic assembling device for filter

Technical Field

The invention relates to the technical field of automatic assembly devices, in particular to an automatic assembly device for a filter.

Background

It has been found that particles present in air or medical fluids can enter the body by air or oxygen inhalation or intravenous infusion of the medical fluid, resulting in an acute pathological response. Particles, including bacteria, that are inhaled into the human body by air or oxygen can cause respiratory infections in humans. If the drug solution is infused into a human body through a vein, the harm may be more serious, and the harm may include phlebitis, thrombocytopenia, vascular embolism, granuloma, pulmonary fibrosis, anaphylaxis, pyrogen reaction and the like. To reduce or prevent this, filters are often added to the air or oxygen intake lines, infusion lines, to filter particles of a certain diameter.

As shown in fig. 1 and 2, the filter 8 includes a filter base 82 and a filter membrane chip 81, the filter base 82 has an opening at the top, the inner side wall of the opening has a radially outwardly protruding step surface 821, and the filter membrane chip 81 is mounted on the step surface 821.

At present, most of filters in the market are assembled manually, a double-layer thin film formed by a filtering film and a bottom film is cut, the filtering film after the film cutting is still kept on the bottom film, and when the filter needs to be assembled, the cut filtering film is taken off and then is installed on a step surface of a filter base.

The above-mentioned assembly method mainly has the following problems: firstly, the integrated operation of on-line full-automatic film cutting and assembly cannot be realized, the time and the cost are high, and more uncontrollable factors in the process of procedure dispersion and the middle process are easy to make mistakes; and secondly, the film is cut firstly and then is uncovered, the two processes are operated respectively, the edge pressing can not be realized when the cutter is used for cutting, the film cannot be uncovered completely, burrs are arranged on the edge, the efficiency is low, and the deviation exists.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automatic filter assembling device which can realize punching, membrane sucking and assembling on line and has high automation degree aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic filter assembling device is characterized by comprising:

the frame is sequentially provided with a double-layer film feeding station, a filtering film punching station, a filter preassembly station, a filter welding station and a filter blanking station according to the sequence of the process flow, and a transition station is arranged in front of the filtering film punching station;

the filtering membrane feeding device can supply the filtering membrane to a double-layer thin film feeding station;

the bottom film feeding device can supply the bottom film to the double-layer film feeding station;

the double-layer film compounding device can be used for laminating the filtering film moved to the double-layer film feeding station and the bottom film into a double-layer film;

the double-layer film stepping feeding device can convey an unbunched double-layer film to a filtering film punching station from a transition station so as to sequentially convey the double-layer film to the filtering film punching station from a double-layer film feeding station;

the filtering membrane punching and picking device can punch the double-layer thin film moved to the filtering membrane punching station to obtain filtering membrane slices and pick the filtering membrane slices into a filter base positioned at a filter preassembling station;

the filter conveying device can convey the filter base to a filter pre-assembly station, a filter welding station and a filter blanking station in sequence; and

the filter welding device can weld the filter membrane slices in the filter base which is moved to the filter welding station on the filter base to form the filter.

In order to avoid that the redundant materials are sent out by continuously unreeling from the first unreeling roller and the second unreeling roller due to inertia under the condition that the filtering membrane and the bottom membrane stop feeding in the double-layer film stepping feeding device, the filtering membrane feeding device comprises

The first unwinding roller is sleeved with a filtering membrane wound into a coil; and

the first tensioning device is in transmission connection with the first unwinding roller and can enable the filtering film to always have the tendency of being wound on the first unwinding roller;

the bottom film feeding device comprises

The second unwinding roller is sleeved with a base film wound into a coil; and

and the second tensioning device is in transmission connection with the second unwinding roller, so that the bottom film can always have the tendency of being wound on the second unwinding roller.

In order to simply realize the complex of filtration membrane and basement membrane, double-deck film set composite including locating first compression roller and the second compression roller on the double-deck film material loading station, form between this first compression roller and the second compression roller and supply filtration membrane, basement membrane to pass and the laminating is the clearance of double-deck film, and filtration membrane is located the basement membrane top.

In order to intermittently and sequentially convey the double-layer film to the filtering film punching station from the double-layer film feeding station automatically, the double-layer film stepping feeding device comprises

The first clamping device comprises a first moving platform positioned above the double-layer film, a first fixed platform positioned below the double-layer film and a first guide rod arranged at the bottom of the first moving platform, wherein the first guide rod can pass through the first fixed platform in a sliding manner, and a punching hole penetrating through the first moving platform from top to bottom is formed in the first moving platform;

the first translation device is in transmission connection with the first clamping device and used for driving the first clamping device to reciprocate between the transition station and the filtering membrane punching station;

the first lifting device is in transmission connection with the first moving platform and used for driving the first moving platform to move relative to the first fixed platform, enabling the first clamping device to be closed in the moving process from the transition station to the filtering membrane punching station and to be opened in the moving process from the filtering membrane punching station to the transition station;

the second clamping device comprises a second moving platform positioned above the double-layer film, a second fixed platform positioned below the double-layer film and a second guide rod arranged at the bottom of the second moving platform, and the second guide rod can pass through the second fixed platform in a sliding manner;

the second translation device is in transmission connection with the second clamping device and used for driving the second clamping device to reciprocate between the transition station and the filtering membrane punching station; and

and the second lifting device is in transmission connection with the second movable table and used for driving the second movable table to move relative to the second fixed table, enabling the second clamping device to be closed in the moving process from the transition station to the filtering membrane punching station and to be opened in the moving process from the filtering membrane punching station to the transition station.

In order to facilitate the driving of the first clamping device by the first translation device and the first lifting device and the driving of the second clamping device by the second translation device and the second lifting device, the double-layer film stepping feeding device also comprises a device for feeding double layers of films

The mounting table is provided with two waist-shaped holes for the first guide rod and the second guide rod to move between the transition station and the filtering membrane punching station side by side;

the first translation device and the first lifting device are in transmission connection with the first clamping device through the first connecting seat;

the number of the second guide rods is two, the two second guide rods are respectively positioned on two sides of the double-layer film, the two second guide rods downwards penetrate through the waist-shaped hole and then are connected through a second connecting seat, and the second translation device and the second lifting device are in transmission connection with the second clamping device through the second connecting seat.

In order to ensure the stable translation of the first clamping device and the second clamping device, the double-layer film stepping feeding device also comprises

The guide rail is arranged on the mounting table and extends from the transition station to the filtering membrane punching station;

and the bottoms of the first fixed table and the second fixed table are respectively provided with a first guide part and a second guide part which are matched with the guide rails in a guiding way.

In order to realize the recovery of waste materials, the frame is also provided with

The waste blanking station is positioned behind the filtering membrane punching station;

the automatic filter assembling device also comprises

The waste material blanking device can be used for rolling waste materials which are moved to a waste material blanking station.

In order to tension the end of the waste, the waste blanking device comprises

The winding roller can be used for winding the waste into a coil; and

and the rotating device is in transmission connection with the winding roller and is used for driving the winding roller to rotate so as to drive the waste materials which are moved to the waste material blanking station to be wound on the winding roller.

In order to synchronously complete the punching and the film suction so as to ensure that the obtained film is more complete and more comfortable, the filtering film punching and picking device comprises a compound cutter and a three-axis driving device;

the compound cutting tool comprises

The shell is provided with a first mounting hole in a penetrating manner along the vertical direction;

the picking piece is arranged in the first mounting hole, the top end and the bottom end of the picking piece are respectively exposed out of the shell, an inner cavity is formed inside the picking piece, a first communicating hole and a second communicating hole are respectively formed in the top end and the bottom end of the picking piece, and the first communicating hole and the second communicating hole are communicated with the inner cavity;

the punching piece is arranged at the bottom of the shell and annularly sleeved on the outer side of the picking piece, and the bottom end of the punching piece is a tool bit; and

the vacuum device is communicated with the first communicating hole at the air exhaust end and can vacuumize the inner cavity of the picking piece; and

the three-shaft driving device can drive the compound cutter to move from the filtering membrane punching station to the filter pre-assembly station so as to pick up the filtering membrane slices into the filter base located at the filter pre-assembly station.

In order to realize the limit of the picking piece in the shell, a limit ring is convexly arranged on the outer side wall of the picking piece along the circumferential direction, correspondingly, a limit groove is arranged on the inner side wall of the shell along the axial direction, the limit ring can be inserted in the limit groove in a sliding way along the vertical direction,

the compound cutting tool also comprises

The spring is arranged in the limiting groove and acts between the top of the limiting groove and the limiting ring, so that the picking piece always has the tendency of being exposed out of the punching piece.

In order to ensure that the bottom of the picking piece uniformly picks up the filter membrane slices, the number of the second communication holes is at least two, and the second communication holes are arranged at the bottom end of the shell or arranged at the central position at intervals along the circumferential direction.

In order to improve the punching efficiency, the number of the first mounting holes is at least two, the first mounting holes are arranged at intervals along the width direction of the double-layer film, and the picking piece and the punching piece which are matched with each other are arranged in each first mounting hole.

In order to ensure that the filtering membrane is fully utilized and avoid generating excessive waste materials, the distance between the connecting lines of the central lines of the cutter heads of two adjacent punching pieces is n times of the outer diameter of the cutter head of the punching piece, and n is more than or equal to 2.

In order to fix the punching part at the bottom of the shell, a knife die frame is installed at the bottom of the shell, a second mounting hole for the punching part to be inserted is formed in the knife die frame in a penetrating mode in the vertical direction, a threaded hole communicated with the second mounting hole is formed in the side wall of the knife die frame, and therefore the fastening piece can be in threaded connection in the threaded hole and abut against the punching part.

In order to realize the movement of the compound cutter in three directions, the three-axis driving device comprises

The third lifting device is in transmission connection with the composite cutter and is used for driving the composite cutter to move in a reciprocating mode between the filtering membrane punching station and the position right above the filtering membrane punching station or between the position right above the filter pre-assembly station and the filter pre-assembly station;

the third translation device is in transmission connection with the composite cutter and is used for driving the composite cutter to reciprocate between the position right above the filtering membrane punching station and the position right above the filter preassembly station; and

and the fourth translation device is in transmission connection with the composite cutter and is used for driving the composite cutter to reciprocate along the width direction of the double-layer film right above the filtering film punching station.

In order to conveniently and sequentially convey the filter base to a filter pre-assembly station, a filter welding station and a filter blanking station, the filter base further comprises a filter jig for mounting the filter base;

the machine frame is also provided with

The filter base feeding station is positioned in front of the filter preassembly station according to the sequence of the process flow;

the filter conveying device comprises

The two guide strips are arranged side by side, extend from the filter preassembly station to the filter welding station, and a guide groove which is arranged along the length direction of the guide strips and is used for the filter jig to slide is formed between the two guide strips;

the first baffle is positioned on one side of the feeding station of the filter base and used for limiting the filter jig positioned on the feeding station of the filter base;

the shifting block can be abutted against the end part of the filter jig; and

and the fifth translation device is in transmission connection with the shifting block and is used for driving the shifting block to reciprocate along the length direction of the first baffle plate, driving the filter jig which is moved to the filter base feeding station to move to the filter preassembly station and enter the guide groove, and further driving the filter jig behind to move backwards under the driving of the filter jig.

In order to automatically assemble the filter membrane slices in the filter base on the filter base to form the filter,

the filter jig is provided with a containing groove for installing the filter base, and the bottom of the filter jig is provided with a through hole communicated with the containing groove;

the filter welding device comprises

The welding head can weld the filter membrane slices positioned on the filter base in the filter base to form the filter;

the fourth lifting device is in transmission connection with the welding head and used for driving the welding head to move in a reciprocating mode between the filter welding station and the position right above the filter welding station;

the limiting plate is limited above the filter welding station and can limit the edge of the filter base;

the first ejector rod can be slidably arranged in the through hole of the filter jig which moves to the filter welding station in a penetrating way and drives the filter base arranged in the accommodating groove of the filter jig to move until the filter membrane slice on the filter base is contacted with the welding head; and

and the fifth lifting devices correspond to the first ejector rods one by one and are in transmission connection with the first ejector rods, and the fifth lifting devices are used for driving the corresponding first ejector rods to reciprocate between the filter welding station and the position right below the filter welding station.

In order to automatically move the filter from the filter blanking station to the filter taking-out station, the automatic filter unloading machine further comprises

The filter blanking device can take out the filter moved to the filter blanking station;

the machine frame is also provided with

The filter taking-out station is positioned behind the filter blanking station according to the sequence of the process flow;

the filter blanking device comprises

The second baffle is positioned on one side of the filter blanking station and used for limiting the filter jig moving to the filter blanking station;

the third baffle is arranged side by side with the second baffle and is positioned at one side of the filter taking-out station and used for limiting the filter jig moving to the filter taking-out station;

the second guide plate is arranged perpendicular to the second baffle plate and is abutted against the tail ends of the second baffle plate and the third baffle plate;

the third guide rod is arranged perpendicular to the second baffle plate and can be slidably arranged in the second baffle plate in a penetrating way; and

and the sixth translation device is in transmission connection with the third guide rod and is used for driving the third guide rod to reciprocate along the length direction of the third guide rod and driving the filter jig which is moved to the filter blanking station to move to the filter taking-out station.

In order to facilitate the taking out of the filter in the filter jig,

the filter blanking device also comprises

The second ejector rod can be slidably arranged in the through hole of the filter jig moved to the filter taking-out station in a penetrating way and drives the filter arranged in the accommodating groove of the filter jig to move upwards; and

and the sixth lifting device is in transmission connection with the second ejector rod and is used for driving the second ejector rod to move in a reciprocating mode between the filter taking-out station and the position right below the filter taking-out station.

Compared with the prior art, the invention has the advantages that: through with filtration membrane loading attachment, basement membrane loading attachment, double-deck film set composite, double-deck film step-by-step feeding device, the die-cut pickup attachment of filtration membrane, filter conveyor, filter welding set and filter unloader locate in the frame and the cooperation work, make the material loading of filtration membrane, the cutting, pick up, with the assembly of filter base, unloading etc. can both replace the manual work to accomplish automatically, full-automatic integration, realize the on-line cutting and the assembly of membrane, product assembly precision is high, inhale when cutting, it is better to tailor the effect, can prevent to inhale the membrane skew, make the membrane that obtains more complete, the docile.

Drawings

FIG. 1 is a schematic perspective view of a filter according to the prior art;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a schematic perspective view of an automatic filter assembling apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a double-layered film feeding device in an embodiment of an automatic filter assembling apparatus according to the present invention;

FIG. 5 is a schematic perspective view of FIG. 4 in another direction;

fig. 6 is an enlarged view of the first clamping device, the first translating device and the first elevating device of fig. 4;

FIG. 7 is an enlarged view of the second clamping device, the second translating device and the second lifting device of FIG. 4;

FIG. 8 is a schematic perspective view of a filter membrane die-cutting pick-up device in an embodiment of an automatic filter assembling device according to the present invention;

FIG. 9 is a perspective view of the composite cutting tool of FIG. 8;

FIG. 10 is a longitudinal cross-sectional view of FIG. 9;

FIG. 11 is an exploded perspective view of FIG. 9;

fig. 12 is a schematic perspective view of the knife holder in fig. 9;

FIG. 13 is a schematic perspective view of a filter transfer unit, a filter welding unit and a filter unloading unit according to an embodiment of the automatic filter assembling apparatus of the present invention;

FIG. 14 is a longitudinal cross-sectional view of the filter welding apparatus of FIG. 13;

FIG. 15 is a longitudinal cross-sectional view of the filter blanking device of FIG. 13;

fig. 16 is a schematic perspective view of a filter blanking device in an embodiment of the automatic filter assembling device according to the present invention (omitting the second lift pin and the sixth lifting device).

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Fig. 1 to 14 show a preferred embodiment of the automatic filter assembling apparatus according to the present invention. The automatic filter assembling device comprises a frame 1, a double-layer film feeding device 2, a filtering film punching and picking device 3, a filter conveying device 4, a filter welding device 5 and a filter blanking device 6, wherein the double-layer film feeding device 2, the filtering film punching and picking device, the filter conveying device 4, the filter welding device and the filter blanking device are arranged on the frame 1.

The machine frame 1 is provided with a double-layer film feeding station, a transition station, a filtering film punching station, a waste material blanking station, a filter base feeding station, a filter pre-assembly station, a filter welding station, a filter blanking station and a filter taking-out station, wherein the double-layer film feeding station, the filtering film punching station, the filter pre-assembly station, the filter welding station, the filter blanking station and the filter taking-out station are sequentially arranged according to the sequence of the process flow, the transition station is located before the filtering film punching station, the waste material blanking station is located after the filtering film punching station, and the filter base feeding station is located before the filter pre-assembly station.

The double-layer film feeding device 2 can respectively convey the filtering film 71 and the bottom film 72 to a double-layer film feeding station, then compound the filtering film 71 above the bottom film 72 to form a double-layer film 7, and convey the double-layer film 7 to a filtering film punching station from the double-layer film feeding station, wherein the double-layer film 7 is a composite film formed by laminating the filtering film 71 and the bottom film 72, and the filtering film 71 is positioned above the bottom film 72; the filtering membrane punching and picking device 3 can punch the double-layer film 7 moved to the filtering membrane punching station to obtain a filtering membrane slice 81, and pick the filtering membrane slice 81 to the step surface 821 of the filter base 82 positioned at the filter pre-assembly station; the filter conveying device 4 can convey the filter base 82 from the filter base feeding station to the filter pre-assembly station, the filter welding station and the filter blanking station in sequence; the filter welding device 5 can weld the filter membrane slices 81 in the filter base 82 moved to the filter welding station on the filter base 82 to form the filter 8; the filter blanking device 6 can remove the filter 8 that has been moved to the filter blanking station.

As shown in fig. 4 to 7, the double-layer film feeding device 2 includes a filtering film feeding device 21, a bottom film feeding device 22, a double-layer film combining device 23, a double-layer film step-by-step feeding device 24, and a waste discharging device 25. The filtering membrane feeding device 21 can feed the filtering membrane 71 to the double-layer membrane feeding station; the base film feeding device 22 can feed the base film 72 to the double-layer film feeding station; the double-layer film compounding device 23 can compound the filter film 71 moved to the double-layer film feeding station above the base film 72 moved to the double-layer film feeding station to form a double-layer film 7; the double-layer film stepping feeding device 24 can convey the non-punched double-layer film 7 to a filtering film punching station from a transition station, so that the double-layer film 7 is conveyed to the filtering film punching station and a waste blanking station from a double-layer film feeding station in sequence; the scrap discharging device 25 can wind the scrap 73 that has been moved to the scrap discharging station.

The filtering membrane feeding device 21 includes a first unwinding roller 211 and a first tensioning device 212. The first unwinding roller 211 is sleeved with the filter membrane 71 wound into a roll; the first tensioning device 212 is in transmission connection with the first unwinding roller 211, so that the filtering membrane 71 always tends to be wound on the first unwinding roller 211.

The carrier film loading device 22 includes a second unwinding roll 221 and a second tensioning device 222. The second unwinding roller 221 is sleeved with a base film 72 wound into a roll; the second tensioning device 222 is in transmission connection with the second unwinding roller 221, so that the bottom film 72 always tends to be wound on the second unwinding roller 221.

The first tensioning device 212 and the second tensioning device 222 can adopt a servo motor (in a torque state to prevent reverse rotation) to achieve the above purpose, so that the filtering film 71 and the bottom film 72 are prevented from being continuously unreeled from the first unreeling roller 211 and the second unreeling roller 221 due to inertia to send out redundant materials under the condition that the double-layer film stepping feeding device 24 stops feeding. In addition, a sensor 213 is arranged on one side of the first unwinding roller 211 and the second unwinding roller 221, and the sensor 213 can detect the diameter of the filter membrane 71/the bottom membrane 72 wound into a roll on the first unwinding roller 211/the second unwinding roller 221 and transmit signals to the first tensioning device 212 and the second tensioning device 222 so as to adjust the tension of the first tensioning device 212 and the second tensioning device 222 and keep constant tension all the time.

The double-layered film laminating apparatus 23 includes a first pressing roller 231, a second pressing roller 232, a first roller 233, and a second roller 234. The first press roller 231 is arranged on the double-layer film feeding station and is abutted to the upper part of the filter membrane 71; the second press roller 232 is arranged on the double-layer film feeding station and is abutted to the lower part of the bottom film 72; a gap through which the filter membrane 71 and the base membrane 72 can pass and be attached to the double-layer thin film 7 is formed between the first pressing roller 231 and the second pressing roller 232, and the filter membrane 71 is positioned above the base membrane 72. The first roller shaft 233 is arranged on the waste blanking station and is abutted against the lower part of the bottom film 72; the second roller 234 is disposed below the first roller 233 and abuts against one side of the base film 72.

The double-layered film step-feeding apparatus 24 includes a mounting table 241, a first clamping apparatus 242, a first translating apparatus 243, a first elevating apparatus 244, a second clamping apparatus 245, a second translating apparatus 246, a second elevating apparatus 247, and a guide rail 248.

Specifically, two waist-shaped holes 2411 extending from the transition station to the filter membrane punching station are arranged on the mounting table 241 side by side;

the guide rail 248 is arranged on the mounting table 241 and extends from the transition station to the filtering membrane punching station;

the first clamping device 242 comprises a first movable table 2421 positioned above the double-layer film 7, a first fixed table 2422 positioned below the double-layer film 7 and a first guide rod 2423 arranged at the bottom of the first movable table 2421; the first moving table 2421 is provided with a punching hole 2426 penetrating from top to bottom; a first guide part 2425 matched with the guide rail 248 in a guiding way is arranged at the bottom of the first fixing table 2422; the number of the first guide bars 2423 is two, the two first guide bars 2423 are respectively positioned on two sides of the double-layer film 7, and the two first guide bars 2423 can slidably penetrate through the first fixing table 2422, downwards penetrate through the kidney-shaped hole 2411 and then are connected through the first connecting seat 2424;

the first translation device 243 is provided with a power output shaft capable of moving in the horizontal direction, and the power output shaft is in transmission connection with the first connecting seat 2424 and is used for driving the first clamping device 242 to reciprocate between the transition station and the filtering membrane punching station;

the first lifting device 244 is provided with a power output shaft capable of moving in the vertical direction, the power output shaft is in transmission connection with the first connecting seat 2424 and is used for driving the first moving table 2421 to move relative to the first fixing table 2422, so that the first clamping device 242 is closed to clamp the double-layer thin film 7 in the moving process from the transition station to the filtering membrane punching station, and is opened to release the double-layer thin film 7 in the moving process from the filtering membrane punching station to the transition station;

the second clamping device 245 comprises a second moving table 2451 positioned above the double-layer film 7, a second fixed table 2452 positioned below the double-layer film 7 and a second guide bar 2453 arranged at the bottom of the second moving table 2451; a second guide 2455 matched with the guide rail 248 in a guiding way is arranged at the bottom of the second fixed table 2452; the number of the second guide rods 2453 is two and the two second guide rods 2453 are respectively located at two sides of the double-layer film 7, and the two second guide rods 2453 can slidably pass through the second fixing table 2452 and are connected through the second connecting seat 2454 after passing through the waist-shaped hole 2411 downwards; in the present embodiment, the second clamping device 245 is disposed closely to the rear side of the first clamping device 242;

a second translation device 246, which is provided with a power output shaft capable of moving along the horizontal direction, and the power output shaft is in transmission connection with the second connecting seat 2454 so as to drive the second clamping device 245 to reciprocate between the transition station and the filtering membrane punching station; wherein, the driving force of the second translation device 246 is smaller than that of the first translation device 243, so that the first translation device 243 can push the first clamping device 242 and the second clamping device 245 to synchronously move backwards without applying force to the second translation device 246 during the process of moving from the transition station to the filtering membrane punching station under the state that the second clamping device 245 is in close contact with the first clamping device 242;

and the second lifting device 247 is provided with a power output shaft capable of moving in the vertical direction, and the power output shaft is in transmission connection with the second connecting seat 2454 and used for driving the second moving table 2451 to move relative to the second fixed table 2452, so that the second clamping device 245 is closed to clamp the double-layer thin film 7 in the moving process from the transition station to the filtering film punching station, and is opened to release the double-layer thin film 7 in the moving process from the filtering film punching station to the transition station.

The waste blanking device 25 comprises a winding roller 251 and a rotating device 252. The winding roller 251 can wind the waste material 73 into a coil; the rotating device 252 is in transmission connection with the winding roller 251 and is used for driving the winding roller 251 to rotate so as to drive the waste material 73 which is moved to the waste material blanking station to be wound on the winding roller 251, and tensioning the end part of the waste material 73.

As shown in fig. 8 to 12, the filter membrane die-cutting pickup apparatus 3 includes a compound cutter 31 and a three-axis drive apparatus 32. The composite cutter 31 can punch the double-layer film 7 moved to the filtering film punching station to obtain filtering film slices 81 and then pick the filtering film slices; and the three-shaft driving device 32 can drive the composite cutter 31 to move from the filtering membrane punching station to the filter pre-assembly station so as to pick up the filtering membrane slices 81 on the step surfaces 821 of the filter base 82 at the filter pre-assembly station.

The compound tool 31 includes a housing 311, a picking member 312, a piercing member 313, a vacuum 314 (not shown), a spring 315, and a tool holder 316.

Specifically, the housing 311 is provided with first mounting holes 3111 extending through in the vertical direction, the number of the first mounting holes 3111 is at least two, the first mounting holes 3111 are arranged at intervals in the width direction of the double-layer film 7, and the inner side wall of the housing 311 is provided with a limit groove 3112 in the axial direction;

the picking member 312 is cylindrical, and is installed in the corresponding first installation hole 3111 in one-to-one correspondence with the first installation hole 3111, and the top end and the bottom end of the picking member 312 are respectively exposed out of the housing 311; an inner cavity 3121 is formed inside the picking member 312, and a first communication hole 3122 and a second communication hole 3123 are respectively opened at the top end and the bottom end, the first communication hole 3122 and the second communication hole 3123 are both communicated with the inner cavity 3121, and the number of the second communication holes 3123 is at least two, and the second communication holes 3123 are arranged at the bottom end of the housing 311 at intervals in the circumferential direction; a limit ring 3124 is convexly arranged on the outer side wall of the picking piece 312 along the circumferential direction, and the limit ring 3124 can be slidably inserted into the limit groove 3112 along the vertical direction;

the punching pieces 313 and the first mounting holes 3111 are arranged at the bottom of the shell 311 in a one-to-one correspondence manner and are annularly sleeved on the outer side of the picking piece 312, the bottom end of the punching piece 313 is provided with a cutter head 3131 which is limited by the structure, two cutter heads 3131 cannot be tightly attached, a gap/interval is reserved between the two cutter heads 3131, the interval causes raw material waste, the interval is controlled to be in a reasonable size, and the raw material utilization rate is improved by transversely moving for multiple punching, specifically, the distance between the central line connecting lines of the cutter heads 3131 of two adjacent punching pieces 313 is n times of the outer diameter of the cutter head 3131 of the punching piece 313, n is more than or equal to 2, and the number of times of transverse moving for punching is n times of an integer, so that a filtering membrane can be fully utilized, and excessive waste materials are avoided;

the air suction end of the vacuum device 314 is communicated with the first communication hole 3122 through the quick connection joint 3141, and can vacuumize the inner cavity 3121 of the picking member 312, so that the air pressure of the inner cavity 3121 of the picking member 312 is switched between a vacuum state and an atmospheric pressure state;

the spring 315 is disposed in the spacing groove 3112 and acts between the top of the spacing groove 3112 and the spacing ring 3124, so that the picking member 312 tends to be exposed from the punching member 313 all the time, and under the action of the spring 315, the spacing ring 3124 is pressed against the bottom of the spacing groove 3112, and the bottom end of the picking member 312 is exposed from the punching member 313.

The cutting die frame 316 is arranged at the bottom of the shell 311, a second mounting hole 3161 for the punching part 313 to be inserted is formed in the cutting die frame 316 in a penetrating mode along the vertical direction, a threaded hole 3162 communicated with the second mounting hole 3161 is formed in the side wall of the cutting die frame 316, the fastening piece can be in threaded connection in the threaded hole 3162 and abut against the outer side wall of the punching part 313, the punching part 313 is fixed, the punching parts 313 are guaranteed to be at the same height, and the punching part 313 is prevented from moving up and down.

The three-axis driving device 32 includes a third elevating device 321, a third translating device 322 and a fourth translating device 323. The third lifting device 321 is provided with a power output shaft capable of moving in the vertical direction, and the power output shaft is in transmission connection with the compound cutter 31 and is used for driving the compound cutter 31 to move back and forth between the filtering membrane punching station and the position right above the filtering membrane punching station or between the position right above the filter pre-assembly station and the filter pre-assembly station; the third translation device 322 is provided with a power output shaft capable of moving along the horizontal direction, and the power output shaft is in transmission connection with the compound cutter 31 and is used for driving the compound cutter 31 to reciprocate between the position right above the filtering membrane punching station and the position right above the filter pre-assembly station; the fourth translation device 323 is provided with a power output shaft capable of moving along the horizontal direction, and the power output shaft is in transmission connection with the compound cutter 31 and is used for driving the compound cutter 31 to reciprocate along the width direction of the double-layer film 7 right above the filtering film punching station. The three-axis driving device 32 further cooperates with the guide rail to ensure the stability of the movement, which is a device commonly used in the tooling, and the detailed parts thereof are not described herein.

As shown in fig. 13, the filter transfer device 4 includes two guide bars 42 arranged side by side, a first baffle 43, a first guide plate 44, a pusher 45, and a fifth translation device 46. The guide strips 42 extend from the filter preassembling station to the filter welding station, and a guide groove 421 which is arranged along the length direction of the guide strips 42 and is used for the filter jig 41 to slide is formed between the two guide strips 42; the first baffle 43 is positioned at one side of the filter base feeding station and used for limiting the filter jig 41 positioned at the filter base feeding station; the first guide plate 44 is arranged perpendicular to the first baffle 43 and used for guiding the filter jig 41 pushed by external force to the filter base feeding station; the shifting block 45 can be abutted against the end part of the filter jig 41; the fifth translation device 46 is in transmission connection with the shifting block 45, and is used for driving the shifting block 45 to reciprocate along the length direction of the first baffle 43, so as to drive the filter jig 41 which has moved to the filter base feeding station to move to the filter pre-assembly station and enter the guide groove 421, and further drive the rear filter jig 41 to move backwards to the corresponding station under the driving of the filter jig 41.

As shown in fig. 14, the filter fixture 41 is provided with receiving grooves 411 for the filter base 82 to be mounted in corresponding to the first mounting holes 3111, and the bottom of the filter fixture 41 is provided with through holes 412 penetrating through the receiving grooves 411. The filter welding device 5 comprises a welding head 51, a fourth lifting device 52, a limit plate 53, a first ejector rod 54 and a fifth lifting device 55. The welding head 51 can weld the filter membrane slices 81 on the filter base 82 on the step surface 821 to form the filter 8; the fourth lifting device 52 is provided with a power output shaft capable of moving along the vertical direction, and the power output shaft is in transmission connection with the welding head 51 and is used for driving the welding head 51 to move back and forth between the filter welding station and the position right above the filter welding station; the limiting plate 53 is limited above the filter welding station and can limit the edge of the filter base 82; each filter base 82 is provided with a first top rod 54 correspondingly, the first top rod 54 can be slidably arranged in the through hole 412 of the filter jig 41 which is moved to the filter welding station in a penetrating way and drives the filter base 82 which is arranged in the accommodating groove 411 of the filter jig 41 to move upwards until the filter membrane slices 81 on the filter base 82 are contacted with the welding head 51; the fifth lifting device 55 has a power output shaft capable of moving in the vertical direction, and is in one-to-one correspondence with the first push rods 54, and the power output shaft thereof is in transmission connection with the corresponding first push rods 54 to drive the first push rods 54 to reciprocate between the filter welding station and the position right below the filter welding station. The limit plate 53 is limited at the edge of the filter base 82, so that the filter base 82 can be prevented from being brought out by the welding head 51; since the extension length of the power output shaft of each fifth elevating device 55 may not be uniform, the filter membrane chip 81 of each filter base 82 can be brought into sufficient contact with the welding head 51 even if there is a deviation in the height of each filter base 82.

As shown in fig. 15 and 16, the filter blanking device 6 includes a second baffle 61, a third baffle 62, a second guide plate 63, a third guide rod 64, a sixth translation device 65, a second push rod 66, and a sixth lifting device 67. The second baffle 61 is positioned at one side of the filter blanking station and used for limiting the filter jig 41 moving to the filter blanking station; the third baffle plate 62 and the second baffle plate 61 are arranged side by side and are positioned at one side of the filter taking-out station to limit the filter jig 41 moving to the filter taking-out station; the second guide plate 63 is arranged perpendicular to the second baffle 61 and abuts against the tail ends of the second baffle 61 and the third baffle 62; the third guide rod 64 is arranged perpendicular to the second baffle 61 and slidably penetrates through the second baffle 61; a sixth translation device 65, which has a power output shaft capable of moving along the horizontal direction, and the power output shaft is in transmission connection with the third guide rod 64, so as to drive the third guide rod 64 to reciprocate along the length direction thereof, and drive the filter jig 41 moved to the filter blanking station to move to the filter taking-out station; the second post rod 66 is slidably inserted into the through hole 412 of the filter jig 41 moved to the filter taking-out station and drives the filter 8 mounted in the housing slot 411 of the filter jig 41 to move upward; the sixth lifting device 67 is provided with a power output shaft capable of moving along the vertical direction, and the power output shaft is in transmission connection with the second ejector rod 66 and is used for driving the second ejector rod 66 to move back and forth between the filter taking-out station and the position right below the filter taking-out station. The tops of the second baffle 61 and the third baffle 62 are respectively provided with a first limiting part 611 and a second limiting part 621 which can be abutted against the top of the filter jig 41 for limiting, so that the filter jig 41 can be prevented from being ejected upwards.

The mechanisms for performing point-to-point movement, such as the lifting device and the moving device including the translation device, are cylinders, and the rotary driving device and the like which need to perform multipoint movement are all servo motors.

The assembling method of the automatic filter assembling device comprises the following steps:

after initialization, the first clamping device 242 and the second clamping device 245 are both positioned at the filtering membrane punching station and are in a closed state;

s1: under the traction of the double-layer film stepping feeding device 24, the filter membrane 71 and the basement membrane 72 are respectively pulled out from the filter membrane feeding device 21 and the basement membrane feeding device 22 and are supplied to a double-layer film feeding station, and the step S2 is carried out;

s2: in the S1, the filter membrane 71 and the bottom membrane 72 positioned at the double-layer membrane feeding station are bonded into a double-layer membrane 7 under the action of the double-layer membrane compounding device 23, and the process enters S3;

s3: the double-layer film stepping feeding device 24 conveys the double-layer film 7 which is not punched to the filtering film punching station from the transition station, so that the double-layer film 7 in the S2 is conveyed to the filtering film punching station from the double-layer film feeding station in sequence, and the specific method is as follows:

(3-1) driving the first moving table 2421 to ascend with respect to the first fixing table 2422 by the first elevating means 244 to convert the first clamping means 242 into an opened state, then driving the first clamping means 242 to move from the filter membrane blanking station to the transition station by the first translating means 243, and then converting the first clamping means 242 into a closed state by the first elevating means 244;

(3-2) driving the second moving stage 2451 to ascend with respect to the second fixed stage 2452 by the second elevating means 247 to convert the second clamping means 245 to an opened state, then driving the second clamping means 245 from the filter membrane blanking station to a transition station by the second translating means 246, and then converting the second clamping means 245 to a closed state by the second elevating means 247;

(3-3) finally, driving the first clamping device 242 and the second clamping device 245 to synchronously move from the transition station to the filtering membrane punching station through the first translation device 243, and entering S4;

in the process, the rotating device 252 drives the winding roller 251 to wind the waste 73, the double-layer film 7 of the double-layer film feeding station moves towards the filtering film punching station under the traction force of the double-layer film stepping feeding device 24, the filtering film 71 and the base film 72 respectively move towards the double-layer film feeding station from the unwinding of the first unwinding roller 211 and the second unwinding roller 221 under the traction force of the double-layer film stepping feeding device 24, and the two layers of films are kept in a tensioning state under the action of the first tensioning device 212 and the second tensioning device 222 when the double-layer film stepping feeding device 24 stops feeding;

s4: in S3, the double-layer film 7 at the filter membrane punching station is adsorbed by the filter membrane punching and picking device 3, and simultaneously the filter membrane slices 81 and the scraps 73 are formed under the punching of the filter membrane punching and picking device 3, and the specific method is as follows:

(4-1) the vacuum device 314 evacuates the picking member 312 through the first communication hole 3122 to place the cavity 3121 of the picking member 312 in a vacuum state;

(4-2) driving the compound cutter 31 to move downwards from right above the filtering membrane punching station by the third lifting device 321 and insert the compound cutter into the punching hole 2426 of the first moving table 2421 until the filtering membrane slices 81 are obtained by punching, wherein in the process, the picking piece 312 adsorbs the double-layer thin film 7 and moves upwards against the elastic force of the spring 315 to enter S5;

s5: the filter conveying device 4 conveys the filter base 82 located at the filter loading station to the filter pre-assembly station, and the filter membrane cut sheet 81 in the S4 is picked up by the filter membrane die-cutting and picking device 3 and then moved into the filter base 82 located at the filter pre-assembly station, and the specific method is as follows:

(5-1) driving the shifting block 45 to translate through a fifth translation device 46, and driving the filter jig 41 to move from the filter base feeding station to the filter pre-assembly station along the first baffle 43 and enter the guide groove 421;

(5-2) the cut filter membrane pieces 81 are adsorbed to the bottom of the picking member 312 through the second communication hole 3123 under the vacuum negative pressure;

(5-3) then, the compound tool 31 is driven to move upwards by the third lifting device 321, and the picking member 312 is reset under the elastic force of the spring 315;

(5-4) driving the compound cutter 31 to move to the position right above the filter preassembly station through the third translation device 322;

(5-5) driving the compound cutter 31 to move downwards to a filter pre-assembly station through a third lifting device 321;

(5-6) vacuum breaking by vacuum apparatus 314 of picking member 312 through first communication aperture 3122 then transfers filter membrane slices 81 into filter base 82 at the filter pre-assembly station;

(5-7) finally, driving the compound cutter 31 to move right above the filtering membrane punching station through the three-axis driving device 32, and entering S6;

after the compound cutter 31 in S4 and S5 completes one cutting and returns, the compound cutter 31 needs to be driven by the fourth translation device 323 to move along the width direction of the double-layer film 7 until the punching piece 313 moves to the position right above the non-punching area in the double-layer film 7, then the second cutting is completed and the return operation is repeated until the nth cutting is completed;

s6: the filter conveying device 4 conveys the filter base 82 with the filtering membrane slices 81 in the filter preassembling station in S5 to a filter welding station, and then the filter welding device 5 welds the filtering membrane slices 81 in the filter base 82 on the filter base 82 to form the filter 8, wherein the specific method is as follows:

(6-1) moving the filter jig 41 positioned at the filter pre-assembly station to a filter welding station backwards under the pushing of the filter jig 41 in front of the filter pre-assembly station;

(6-3) then driving the welding head 51 to move down to the filter welding station by the fourth elevating device 52;

(6-2) driving the corresponding first ejector rods 54 to move upwards through the fifth lifting devices 55, driving the filter base 82 installed in the accommodating groove 411 of the filter jig 41 to move upwards until the filter membrane slices 81 on the filter base 82 contact with the welding head 51, and welding the filter membrane slices 81 on the filter base 82 by the welding head 51 on the step surface 821 to form the filter 8;

(6-4) finally, driving the welding head 51 and the first ejector rod 54 to return to the original positions through the fourth lifting device 52 and the fifth lifting device 55 respectively, and entering S7;

s7: the filter conveying device 4 conveys the filter 8 positioned at the filter welding station in the step S6 to the filter blanking station, and then the filter blanking device 6 takes out the filter 8 moved to the filter blanking station, wherein the specific method is as follows:

(7-1) the filter jig 41 positioned at the filter welding station moves backwards to a filter blanking station under the pushing of the filter jig 41 in front of the filter welding station;

(7-2) driving the third guide rod 64 to move towards the second baffle 61 through the sixth translation device 65, and driving the filter jig 41 to move to the filter taking-out station along the second guide plate 63 until the filter jig abuts against the third baffle 62;

(7-3) driving the second ejector rod 66 to move upwards through the sixth lifting device 67, driving the filter 8 installed in the accommodating groove 411 of the filter jig 41 to move upwards, and placing the filter base 82 in the filter jig 41 for standby after taking away the ejected filter 8;

(7-4) finally, the third guide rod 64 and the second push rod 66 are driven to return to the original positions through a sixth translation device 65 and a sixth lifting device 67 respectively.

Claims

1. An automatic filter assembling device is characterized by comprising:

the machine frame (1) is sequentially provided with a double-layer film feeding station, a filtering film punching station, a filter pre-assembling station, a filter welding station and a filter blanking station according to the sequence of the process flow, and a transition station is arranged in front of the filtering film punching station;

a filter membrane feeding device (21) capable of feeding a filter membrane (71) to a double-layer film feeding station;

a base film feeding device (22) capable of supplying a base film (72) to the double-layer film feeding station;

the double-layer film compounding device (23) can be used for attaching the filtering film (71) and the bottom film (72) which are moved to the double-layer film feeding station into a double-layer film (7);

the double-layer film stepping feeding device (24) can convey the non-punched double-layer film (7) to a filtering film punching station from a transition station so as to convey the double-layer film (7) to the filtering film punching station from a double-layer film feeding station in sequence;

the filtering membrane punching and picking device (3) can punch the double-layer film (7) moved to the filtering membrane punching station to obtain a filtering membrane slice (81), and pick the filtering membrane slice (81) into a filter base (82) positioned at a filter preassembling station;

the filter conveying device (4) can convey the filter base (82) to a filter pre-assembly station, a filter welding station and a filter blanking station in sequence; and

the filter welding device (5) can weld the filter membrane slices (81) in the filter base (82) which is moved to the filter welding station on the filter base (82) to form the filter (8);

the double-layer film stepping feeding device (24) comprises

The first clamping device (242) comprises a first moving table (2421) positioned above the double-layer film (7), a first fixing table (2422) positioned below the double-layer film (7) and a first guide rod (2423) arranged at the bottom of the first moving table (2421), the first guide rod (2423) can pass through the first fixing table (2422) in a sliding manner, and a punching hole (2426) penetrating through the first moving table (2421) from top to bottom is formed in the first moving table (2421);

the first translation device (243) is in transmission connection with the first clamping device (242) and is used for driving the first clamping device (242) to reciprocate between the transition station and the filtering membrane punching station;

the first lifting device (244) is in transmission connection with the first moving table (2421) and is used for driving the first moving table (2421) to move relative to the first fixing table (2422) and enabling the first clamping device (242) to be closed during moving from the transition station to the filter membrane punching station and to be opened during moving from the filter membrane punching station to the transition station;

the second clamping device (245) comprises a second moving platform (2451) positioned above the double-layer film (7), a second fixed platform (2452) positioned below the double-layer film (7) and a second guide rod (2453) arranged at the bottom of the second moving platform (2451), and the second guide rod (2453) can pass through the second fixed platform (2452) in a sliding mode;

the second translation device (246) is in transmission connection with the second clamping device (245) and is used for driving the second clamping device (245) to reciprocate between the transition station and the filtering membrane punching station; and

the second lifting device (247) is in transmission connection with the second moving table (2451) and used for driving the second moving table (2451) to move relative to the second fixed table (2452) and enabling the second clamping device (245) to be closed in the process of moving from the transition station to the filter membrane punching station and to be opened in the process of moving from the filter membrane punching station to the transition station;

the filtering membrane punching and picking device (3) comprises a compound cutter (31) and a three-axis driving device (32);

the compound cutter (31) comprises

The shell (311) is provided with a first mounting hole (3111) in a penetrating mode along the vertical direction;

the picking piece (312) is arranged in the first mounting hole (3111), the top end and the bottom end of the picking piece are respectively exposed out of the shell (311), an inner cavity (3121) is formed inside the picking piece, the top end and the bottom end of the picking piece are respectively provided with a first communicating hole (3122) and a second communicating hole (3123), and the first communicating hole (3122) and the second communicating hole (3123) are communicated with the inner cavity (3121);

the punching piece (313) is arranged at the bottom of the shell (311), annularly sleeved on the outer side of the picking piece (312), and the bottom end of the punching piece is provided with a cutter head (3131); and

the vacuum device (314) is communicated with the first communicating hole (3122) at the air exhaust end and can vacuumize the inner cavity (3121) of the picking piece (312);

the three-shaft driving device (32) can drive the composite cutter (31) to move from the filtering membrane punching station to the filter pre-assembly station so as to pick the filtering membrane slices (81) into the filter base (82) positioned at the filter pre-assembly station.

2. The automatic filter assembling apparatus according to claim 1, wherein: the filtering membrane feeding device (21) comprises

A first unwinding roller (211) sleeved with a filter membrane (71) wound into a coil; and

the first tensioning device (212) is in transmission connection with the first unwinding roller (211) and can enable the filtering membrane (71) to always have the tendency of being wound on the first unwinding roller (211);

the bottom film feeding device (22) comprises

A second unwinding roller (221) sleeved with a base film (72) wound into a roll; and

and the second tensioning device (222) is in transmission connection with the second unwinding roller (221), so that the bottom film (72) always tends to be wound on the second unwinding roller (221).

3. The automatic filter assembling apparatus according to claim 1, wherein: double-deck film set composite (23) including locate first compression roller (231) and second compression roller (232) on double-deck film material loading station, form between this first compression roller (231) and second compression roller (232) and supply filter membrane (71), basement membrane (72) to pass and the laminating is the clearance of double-deck film (7), and filter membrane (71) are located basement membrane (72) top.

4. The automatic filter assembling apparatus according to claim 1, wherein: the double-layer film stepping feeding device (24) also comprises

The mounting table (241) is provided with two waist-shaped holes (2411) which are used for the first guide rod (2423) and the second guide rod (2453) to move between the transition station and the filter membrane punching station side by side;

the number of the first guide rods (2423) is two, the two first guide rods (2423) are respectively positioned on two sides of the double-layer film (7), the two first guide rods (2423) downwards penetrate through the waist-shaped hole (2411) and then are connected through a first connecting seat (2424), and the first translation device (243) and the first lifting device (244) are in transmission connection with the first clamping device (242) through the first connecting seat (2424);

the number of the second guide rods (2453) is two, the two second guide rods (2453) are respectively positioned on two sides of the double-layer film (7), the two second guide rods (2453) downwards penetrate through the waist-shaped hole (2411) and then are connected through a second connecting seat (2454), and the second translation device (246) and the second lifting device (247) are in transmission connection with the second clamping device (245) through the second connecting seat (2454).

5. The automatic filter assembling apparatus according to claim 4, wherein: the double-layer film stepping feeding device (24) also comprises

The guide rail (248) is arranged on the mounting table (241) and extends from the transition station to the filtering membrane punching station;

the bottoms of the first fixing table (2422) and the second fixing table (2452) are respectively provided with a first guide part (2425) and a second guide part (2455) which are in guide fit with the guide rail (248).

6. The automatic filter assembling apparatus according to claim 1, wherein: the frame (1) is also provided with

the automatic filter assembling device also comprises

And a scrap discharge device (25) capable of winding the scrap (73) moved to the scrap discharge station.

7. The automatic filter assembling apparatus according to claim 6, wherein: the waste material blanking device (25) comprises

A winding roller (251) for winding the waste material (73) into a coil; and

and the rotating device (252) is in transmission connection with the winding roller (251) and is used for driving the winding roller (251) to rotate so as to drive the waste (73) which is moved to the waste blanking station to be wound on the winding roller (251).

8. The automatic filter assembling apparatus according to claim 7, wherein: a limit ring (3124) is convexly arranged on the outer side wall of the picking piece (312) along the circumferential direction, correspondingly, a limit groove (3112) is arranged on the inner side wall of the shell (311) along the axial direction, and the limit ring (3124) can be slidably inserted into the limit groove (3112) along the vertical direction;

the compound cutter (31) also comprises

And the spring (315) is arranged in the limiting groove (3112) and acts between the top of the limiting groove (3112) and the limiting ring (3124), so that the picking part (312) always has the tendency of being exposed out of the punching part (313).

9. The automatic filter assembling apparatus according to claim 7, wherein: the number of the second communication holes (3123) is at least two, and the second communication holes are arranged at intervals in the circumferential direction at the bottom end of the housing (311) or opened at a central position.

10. The automatic filter assembling apparatus according to claim 7, wherein: the number of the first mounting holes (3111) is at least two, the first mounting holes are arranged at intervals along the width direction of the double-layer film (7), and the picking piece (312) and the punching piece (313) which are matched with each other are arranged in each first mounting hole (3111).

11. The automatic filter assembling apparatus according to claim 10, wherein: the distance between the connecting lines of the central lines of the cutting heads (3131) of two adjacent punching pieces (313) is n times of the outer diameter of the cutting head (3131) of the punching piece (313), and n is more than or equal to 2.

12. The automatic filter assembling apparatus according to claim 7, wherein: the bottom of the shell (311) is provided with a knife mould frame (316), a second mounting hole (3161) for inserting the punching part (313) is formed in the knife mould frame (316) in a penetrating mode along the vertical direction, a threaded hole (3162) communicated with the second mounting hole (3161) is formed in the side wall of the knife mould frame (316), and therefore the fastening part can be in threaded connection in the threaded hole (3162) and is abutted to the punching part (313).

13. The automatic filter assembling apparatus according to claim 7, wherein: the three-axis driving device (32) comprises

The third lifting device (321) is in transmission connection with the composite cutter (31) and is used for driving the composite cutter (31) to move back and forth between the filtering membrane punching station and the position right above the filtering membrane punching station or between the position right above the filter pre-assembly station and the filter pre-assembly station;

the third translation device (322) is in transmission connection with the composite cutter (31) and is used for driving the composite cutter (31) to reciprocate between the position right above the filtering membrane punching station and the position right above the filter pre-assembly station; and

and the fourth translation device (323) is in transmission connection with the composite cutter (31) and is used for driving the composite cutter (31) to reciprocate along the width direction of the double-layer film (7) right above the filtering film punching station.