CN216982216U

CN216982216U - A conveying switching device for PCB processing

Info

Publication number: CN216982216U
Application number: CN202122926635.2U
Authority: CN
Inventors: 李永贤; 郭重基; 龚泽辉
Original assignee: Chengdu Jindali Technology Co ltd
Current assignee: Chengdu Jindali Technology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-07-15
Anticipated expiration: 2031-11-25

Abstract

The utility model belongs to the technical field of PCB processing devices, and particularly relates to a conveying switching device for PCB processing, which comprises a jacket, a fixed sleeve, a first transmission assembly, a second transmission assembly, a power device and a controller, wherein the lower end of the jacket is embedded in the fixed sleeve, the lower end of the jacket is connected with the first transmission assembly, the fixed sleeve is connected with the second transmission assembly, the power device is respectively connected with the first transmission assembly and the second transmission assembly, under the action of the power device, the second transmission assembly drives the jacket and the fixed sleeve to move up and down together, the first transmission assembly drives the jacket to move up and down so that the jacket and the fixed sleeve do relative extension or contraction movement, when the jacket and the fixed sleeve extend relatively, the jacket is in an open state and is used for receiving a workpiece, and when the jacket and the fixed sleeve shrink relatively, the jacket is in a clamping state and is used for clamping the workpiece. The utility model can meet the requirement of flexibly transferring the adapter and has the function of self-adaptive positioning.

Description

A conveying switching device for PCB processing

Technical Field

The utility model belongs to the technical field of PCB processing devices, and particularly relates to a conveying switching device for PCB processing.

Background

Pcb (printed Circuit board), which is called printed Circuit board in chinese, is an important electronic component, is a support for electronic components, and is a carrier for electrical interconnection of electronic components. It is called a "printed" circuit board because it is made using electronic printing. The manufacture of the PCB is a relatively complex process, and basically, corresponding equipment is required to be processed in each production link, which requires a great deal of effort and cost. At present, the equipment in the PCB processing industry needs to continuously replace processing tools (such as milling cutters, drilling cutters, positioning pins, etc.) during the working process, in the prior art, a fixed sleeve is usually used to fix a movable base, fix the sleeve and transfer the processing tools (refer to fig. 1), and the fixed transfer equipment generally has several disadvantages: 1. the fixed sleeve cannot meet the function of flexibly transferring the machining tool; 2. the moving base can not ensure the self-adaptive positioning function when the machining tool is transferred, deviation is easy to occur in the positioning process, and asynchronous phenomenon can occur in the bidirectional movement, so that the tool falls off, is damaged and the like; 3. in the process of transferring and transferring the machining tools, the machining tools such as the milling cutter, the drilling tool, the pin and the like are not positioned accurately, so that the machining tools fall off during machining, production is influenced, and production benefits are greatly reduced.

With the development of the modern industrial society, the intelligent function endowed to the equipment is more and more concerned by equipment manufacturers and users, and in the field of Printed Circuit Board (PCB) processing, the intelligent automatic transmission and switching function of the processing tool is a trend of future development, so that the time for changing the tool can be more conveniently reduced for equipment operators, and the standby time of the processing equipment can be shortened. Therefore, there is a need to develop a function transferring device with adaptive positioning function, which can transfer the processing tool more conveniently, so as to meet the requirements of modern intelligent manufacturing and market.

SUMMERY OF THE UTILITY MODEL

The utility model provides a transmission switching device for PCB processing, aiming at the problems of poor convenience, inaccurate positioning of the existing switching processing equipment, low intellectualization and the like in the prior art.

The utility model provides a conveying switching device for PCB processing, which comprises a jacket, a fixed sleeve, a first transmission assembly, a second transmission assembly, a power device and a controller, wherein the lower end of the jacket is sleeved and embedded in the fixed sleeve, the lower end of the jacket is connected with the first transmission assembly, the fixed sleeve is connected with the second transmission assembly, the power device is respectively connected with the first transmission assembly and the second transmission assembly, and the second transmission assembly drives the jacket and the fixed sleeve to move up and down together under the action of the power device; under the action of the power device, the first transmission assembly drives the clamping sleeve to move up and down, so that the clamping sleeve and the fixed sleeve do relative extension or contraction movement, when the clamping sleeve and the fixed sleeve extend relatively, the clamping sleeve is in an opening state and is used for receiving a workpiece, when the clamping sleeve and the fixed sleeve contract relatively, the clamping sleeve is in a clamping state and is used for clamping the workpiece, the controller is connected with the power device, and the controller controls the movement of the first transmission assembly and the second transmission assembly through the power device.

Preferably, the power device is an air driving device, the first transmission assembly comprises a first piston and a first joint, the second transmission assembly comprises a second piston and a second joint, the air driving device is respectively connected with the first joint and the second joint, the first joint is communicated with the first piston, the upper end of the first piston is connected with the lower end of the jacket, and under the action of the air driving device, the first piston makes telescopic motion to enable the jacket and the fixed sleeve to relatively extend or contract; the second joint is communicated with the second piston, and under the action of an air driving device, the second piston makes telescopic motion, so that the jacket and the fixed sleeve move up and down together.

Preferably, the power device is an air driving device, the first transmission assembly comprises a first joint, a first piston and a first sleeve matched with the first piston, the second transmission assembly comprises a second joint and a second sleeve, the air driving device is respectively connected with the first joint and the second joint, the first joint is communicated with the first sleeve, the upper end of the first sleeve is connected with the lower end of the fixed sleeve, and under the action of the air driving device, the first piston and the first sleeve do telescopic motion to enable the jacket and the fixed sleeve to relatively extend or contract; the lower end of the first sleeve is embedded in the upper end of the second sleeve and is matched with the second sleeve to form a second piston, the second joint is communicated with the second sleeve, and under the action of the air driving device, the first sleeve and the second sleeve do telescopic motion to enable the clamping sleeve and the fixed sleeve to move up and down together.

Preferably, the clamping sleeve is a collet chuck, a headless stud is arranged at the lower end of the collet chuck, a screw hole matched with the thread of the headless stud is arranged at the upper end of the first piston, the collet chuck is fixed at the upper end of the first piston through the headless stud, when the collet chuck and the fixed sleeve contract relatively, the collet chuck contracts along the radial direction, and the collet chuck is in a clamping state and is used for clamping the workpiece.

Preferably, an inverted step is formed at the upper end of the collet chuck, the inverted step contracts along the radial direction compared with the lower end of the collet chuck, a plurality of bosses along the circumferential direction of the workpiece are arranged at intervals at one end of the workpiece, when the collet chuck and the fixed sleeve contract relatively, the inverted step contracts along the radial direction, and the inverted step is matched with the bosses and used for clamping the workpiece.

Preferably, the transmission switching device for PCB processing further comprises a piston ring, the piston ring is embedded in an outer periphery of the upper end of the first piston, and the outer periphery of the piston ring is slidably abutted to an inner periphery of the fixing sleeve, so that when the first piston and the fixing sleeve move relatively, the piston ring enables an axial center of the first piston and an axial center of the fixing sleeve to be on the same straight line.

Preferably, the conveying and transferring device for PCB processing further includes a positioning pin, the fixing sleeve is provided with a positioning hole matched with the positioning pin along a radial direction, the first piston is provided with a sliding groove extending along an axial direction, an upper end portion of the sliding groove is located at an upper end portion of the first piston, a lower end portion of the sliding groove is located in a middle portion of the first piston, the positioning pin penetrates through the positioning hole and extends into the clamping sleeve, when the first piston and the clamping sleeve relatively extend or contract, one end of the positioning pin relatively slides with the sliding groove, and when one end of the positioning pin moves to a lower end portion of the sliding groove, the relative extension movement of the first piston and the clamping sleeve is limited.

Preferably, the transfer adapter device for PCB processing includes a transfer adapter main body and a base, the lower end of the second piston is connected to the transfer adapter main body, the lower end of the fixing sleeve is connected to the upper end of the transfer adapter main body, and under the action of the second piston, the transfer adapter main body and the base are close to or away from each other, so that the jacket and the fixing sleeve move up and down together.

Preferably, the conveying switching device for processing the PCB further comprises a guide post, the conveying switching main body is provided with a guide hole, the lower end of the guide post is connected to the base, the upper end of the guide post is slidably embedded in the guide hole, and the conveying switching main body moves up and down along the guide post when moving up and down.

Preferably, the base is opened to second sleeve section of thick bamboo lower extreme, the periphery of base is more the second sleeve section of thick bamboo is radially outwards protruding, the base seals second sleeve section of thick bamboo lower extreme, the base still is provided with the connecting hole, the connecting hole is used for connecting conveying switching device on the movable base for the work piece is processed PCB through the motion of movable base.

The conveying switching device for PCB processing provided by the utility model can meet the requirements of flexibly conveying switching processing tools, can ensure the function of self-adaptive positioning when conveying the switching processing tools, has no deviation in the positioning process, can better synchronize bidirectional movement, and avoids the processing tools from falling, being damaged and the like.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the utility model.

Fig. 1 is a schematic structural diagram of a transfer switching apparatus provided in the prior art;

FIG. 2 is a schematic view of a mating structure provided in the first embodiment;

FIG. 3 is a schematic illustration of an exploded structure provided by the first embodiment;

FIG. 4 is a partial enlarged view of the location A of FIG. 3;

fig. 5 is a schematic structural diagram provided in the second embodiment.

In the figure: the device comprises a workpiece 1, a boss 101, a jacket 2, a reversing step 201, a headless stud 202, a fixing sleeve 3, a positioning hole 301, a positioning pin 302, a first piston 4, a piston ring 401, a sliding groove 402, a transmission switching main body 5, a first joint 6, a second joint 7, a second piston 8, a guide post 9, a base 10, a first sleeve 11 and a second sleeve 12.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 2 to 5, the present invention provides a transmission switching device for PCB processing, which includes a jacket 2, a fixed sleeve 3, a first transmission assembly, a second transmission assembly, a power device and a controller, wherein the lower end of the jacket 2 is embedded in the fixed sleeve 3, the lower end of the jacket 2 is connected with the first transmission assembly, the fixed sleeve 3 is connected with the second transmission assembly, the power device is respectively connected with the first transmission assembly and the second transmission assembly, and under the action of the power device, the second transmission assembly drives the jacket 2 and the fixed sleeve 3 to move up and down together; under the action of a power device, the first transmission assembly drives the jacket 2 to move up and down, so that the jacket 2 and the fixed sleeve 3 do relative extension or contraction motion, when the jacket 2 and the fixed sleeve 3 extend relatively, the jacket 2 is in an opening state and is used for bearing the workpiece 1, when the jacket 2 and the fixed sleeve 3 contract relatively, the jacket 2 is in a clamping state and is used for clamping the workpiece 1, the controller is connected with the power device, and the controller controls the first transmission assembly and the second transmission assembly to move through the power device. The upper and lower references in this application refer to the work piece 1 as the reference when the transfer adapter for PCB processing is in use. The power means may be implemented in various forms, for example by electromagnetic drive means, but also by air drive means. The workpiece 1 may be a processing tool used in a PCB processing process, including a milling cutter, a drill, a positioning pin 302 and other processing tools; the workpiece 1 may also be a product part in a manufacturing process.

Referring to fig. 2-5, in use, first, under the action of the power device, the second transmission assembly drives the jacket 2 and the fixing sleeve 3 to move up and down together to reach a preset height position; secondly, the first transmission component drives the jacket 2 to move upwards, so that the jacket 2 and the fixed sleeve 3 do relative extension movement, and the workpiece 1 is embedded in the jacket 2; furthermore, when the clamping sleeve 2 and the fixed sleeve 3 contract relatively, one end of the workpiece 1 contracts into the fixed sleeve 3 along with the telescopic clamping sleeve 2, the fixed sleeve 3 enables one end of the workpiece 1 clamped by the clamping sleeve 2 to contract radially, the clamping sleeve 2 generates radial acting force on the workpiece 1, the workpiece 1 is fixed relative to the telescopic clamping sleeve 2 and the fixed sleeve 3, and the workpiece 1 can be used in a PCB processing state; finally, when the current process is completed, the workpiece 1 loaded currently needs to be replaced, the workpiece 1 can be transferred to a preset position through the first transmission assembly and the second transmission assembly, the power device is controlled, the first transmission assembly drives the clamping sleeve 2 to move upwards, the clamping sleeve 2 and the fixed sleeve 3 do relative extension movement, the radial acting force generated by the clamping sleeve 2 on the workpiece 1 is reduced, further, the workpiece 1 moves to a tool rest and the like, the workpiece 1 is placed on the tool rest, and the power device is controlled, so that the clamping sleeve 2 is separated from the workpiece 1. The controller controls the first transmission assembly and the second transmission assembly to move through the power device, and therefore automation of the whole process by the transmission switching device is achieved. In some embodiments, the transfer adapter can also be used in conjunction with a machine tool spindle or a fixture with equivalent function, the machine tool spindle or the fixture releases the workpiece 1 to the jacket 2, and the jacket 2 naturally contracts by moving linearly inside the fixed sleeve 3, so that the workpiece 1 is fixed relative to the telescopic jacket 2 and the fixed sleeve 3.

Referring to fig. 2-4, in a preferred embodiment, the power device is an air driving device, the first transmission assembly includes a first piston 4 and a first joint 6, the second transmission assembly includes a second piston 8 and a second joint 7, the air driving device is respectively connected to the first joint 6 and the second joint 7, the first joint 6 is communicated with the first piston 4, the upper end of the first piston 4 is connected to the lower end of the jacket 2, and under the action of the air driving device, the first piston 4 makes a telescopic motion, so that the jacket 2 and the fixing sleeve 3 relatively extend or contract; the second joint 7 is communicated with a second piston 8, and the second piston 8 makes telescopic motion under the action of an air driving device, so that the jacket 2 and the fixed sleeve 3 move up and down together. The embodiment is a first embodiment of the transfer switching device, the first piston 4 is inflated or exhausted through the air driving device to realize the telescopic motion of the first piston 4, the second piston 8 is inflated or exhausted through the air driving device to realize the telescopic motion of the second piston 8, further, the controller is connected with the air driving device, the controller controls the motion of the first piston 4 and the second piston 8 through the power device, and the automatic control of the transfer switching device on the fixing, switching, transferring and unloading of the workpiece 1 is realized. The first joint 6 and the second joint 7 are respectively a first universal joint and a second universal joint, and the air driving device is a purified air driving device. Through the design of air drive, more make things convenient for the conveying switching device who is used for PCB processing to use.

Referring to fig. 3-5, in a preferred embodiment, the power device is an air driving device, the first transmission assembly includes a first joint 6, a first piston 4 and a first sleeve 11 engaged with the first piston 4, the second transmission assembly includes a second joint 7 and a second sleeve 12, the air driving device is respectively connected to the first joint 6 and the second joint 7, the first joint 6 is communicated with the first sleeve 11, the upper end of the first sleeve 11 is connected to the lower end of the fixed sleeve 3, and under the action of the air driving device, the first piston 4 and the first sleeve 11 make telescopic motion, so that the jacket 2 and the fixed sleeve 3 extend or contract relatively; the lower end of the first sleeve 11 is embedded in the upper end of the second sleeve 12 and is matched with the second sleeve 12 to form a second piston 8, the second joint 7 is communicated with the second sleeve 12, and under the action of an air driving device, the first sleeve 11 and the second sleeve 12 do telescopic motion to enable the jacket 2 and the fixed sleeve 3 to move up and down together. Compared with the first embodiment, the second embodiment of the transfer device has the advantages that the lower end of the first sleeve 11 is embedded in the upper end of the second sleeve 12 and is matched with the second sleeve 12 to form the second piston 8, so that the overall structure is simplified, the processing is simple, the assembly is easy, and the overall benefit can be effectively improved. When in use, firstly, under the action of an air driving device, gas is input into the second sleeve 12 through the second connector 7, so that the first sleeve 11 is extended relative to the second sleeve 12, and the first sleeve 11 reaches a preset height position; secondly, under the action of an air driving device, gas is input into the first sleeve 11 through the first joint 6, the first piston 4 drives the jacket 2 to move upwards, so that the jacket 2 and the fixed sleeve 3 do relative extension movement, and the workpiece 1 is embedded in the jacket 2. The steps of fixing the sleeve 3 by applying a radial force to the workpiece 1 by the collet 2 and disengaging the collet 2 from the workpiece 1 are the same as in the above embodiments, and will not be described herein again.

Referring to fig. 2-5, in a preferred embodiment, the collet 2 is a collet chuck, the collet chuck is provided with a headless stud 202 at a lower end thereof, the upper end of the first piston 4 is provided with a screw hole engaged with the screw thread of the headless stud 202, the collet chuck is fixed to the upper end of the first piston 4 through the headless stud 202, and when the collet chuck and the fixing sleeve 3 are relatively contracted, the collet chuck is contracted in a radial direction, and the collet chuck is in a clamping state for clamping the workpiece 1. Furthermore, an inverted step 201 is formed at the upper end of the collet chuck, the inverted step 201 contracts along the radial direction compared with the lower end of the collet chuck, a plurality of bosses 101 along the circumferential direction of the workpiece 1 are arranged at intervals at one end of the workpiece 1, when the collet chuck and the fixed sleeve 3 contract relatively, the inverted step 201 contracts along the radial direction, and the inverted step 201 is matched with the bosses 101 and used for clamping the workpiece 1. A spring chuck (also called collet chuck) is a cylindrical fixture used for fixing processing tools such as a drill bit or a milling cutter and the like on a milling machine, and is a fixing device used for fixing and reinforcing parts needing to be modified. The design of the spring chuck enables the conveying switching device to have a self-adaptive positioning function, the workpiece 1 can be conveyed conveniently, deviation does not occur in the positioning process, and bidirectional movement can be synchronized better. The design of back-off step 201 can avoid appearing work piece 1 scheduling problem that drops when adding man-hour.

Referring to fig. 2-5, in a preferred embodiment, the transmission adapter for PCB processing further includes a piston ring 401, the piston ring 401 is embedded in an outer circumference of an upper end of the first piston 4, and the outer circumference of the piston ring 401 slidably abuts against an inner circumference of the fixing sleeve 3, so that when the first piston 4 and the fixing sleeve 3 move relatively, the piston ring 401 aligns an axial center of the first piston 4 with an axial center of the fixing sleeve 3. Furthermore, the transmission switching device for PCB processing further includes a positioning pin 302, the fixing sleeve 3 is provided with a positioning hole 301 matching with the positioning pin 302 along the radial direction, the first piston 4 is provided with a sliding groove 402 extending along the axial direction, an upper end portion of the sliding groove 402 is located at an upper end portion of the first piston 4, a lower end portion of the sliding groove 402 is located at a middle portion of the first piston 4, the positioning pin 302 passes through the positioning hole 301 and extends into the jacket 2, when the first piston 4 and the jacket 2 relatively extend or contract, one end of the positioning pin 302 slides relative to the sliding groove 402, and when one end of the positioning pin 302 moves to a lower end portion of the sliding groove 402, the relative extension movement of the first piston 4 and the jacket 2 is limited. The positioning pin 302 is generally a C-shaped positioning pin 302, and the chute 402 is matched with the positioning pin 302, so that the conveying and switching device for processing the PCB is more accurate to move, and the workpiece 1 is accurately positioned.

Referring to fig. 2 to 5, in a preferred embodiment, the transfer adapter for PCB processing includes a transfer adapter body 5 and a base 10, a lower end of a second piston 8 is connected to the base 10, a lower end is connected to the transfer adapter body 5, a lower end of a fixing sleeve 3 is connected to an upper end of the transfer adapter body 5, and the transfer adapter body 5 is moved up and down together with the base 10 by the transfer adapter body 5 approaching or separating the transfer adapter body 5 and the base 10 from each other by the second piston 8. Further, a conveying switching device for PCB processing still includes guide post 9, and conveying switching main part 5 has seted up the guiding hole, and the lower extreme of guide post 9 is connected on base 10, and the embedding of guide post 9 upper end slidable is established in the guiding hole, and when conveying switching main part 5 moved from top to bottom, moved from top to bottom along guide post 9. The guide posts 9 are arranged so that the transfer adapter body 5 moves in a predetermined direction, ensuring smooth movement thereof.

Referring to fig. 5, in a preferred embodiment, a base 10 is formed at a lower end of the second sleeve 12, an outer circumference of the base 10 protrudes outward in a radial direction than the second sleeve 12, the base 10 closes the lower end of the second sleeve 12, and the base 10 is further provided with a connection hole for connecting the transfer adapter to the movable base, so that the workpiece 1 processes the PCB through the movement of the movable base.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "preferred embodiment," "yet another embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.

Claims

1. A conveying switching device for PCB processing is characterized by comprising a jacket, a fixed sleeve, a first transmission assembly, a second transmission assembly, a power device and a controller, wherein the lower end of the jacket is embedded in the fixed sleeve, the lower end of the jacket is connected with the first transmission assembly, the fixed sleeve is connected with the second transmission assembly, the power device is respectively connected with the first transmission assembly and the second transmission assembly, and the second transmission assembly drives the jacket and the fixed sleeve to move up and down together under the action of the power device; under the action of the power device, the first transmission assembly drives the jacket to move up and down, so that the jacket and the fixed sleeve do relative extension or contraction movement, when the jacket and the fixed sleeve extend relatively, the jacket is in an opening state and is used for bearing a workpiece, when the jacket and the fixed sleeve contract relatively, the jacket is in a clamping state and is used for clamping the workpiece, the controller is connected with the power device, and the controller controls the movement of the first transmission assembly and the second transmission assembly through the power device.

2. A conveying adapter device for PCB processing as claimed in claim 1, wherein the power device is an air driving device, the first driving assembly includes a first piston and a first joint, the second driving assembly includes a second piston and a second joint, the air driving device is respectively connected to the first joint and the second joint, the first joint is connected to the first piston, the upper end of the first piston is connected to the lower end of the jacket, and under the action of the air driving device, the first piston makes a telescopic motion to relatively extend or contract the jacket and the fixing sleeve; the second joint is communicated with the second piston, and under the action of an air driving device, the second piston makes telescopic motion, so that the jacket and the fixed sleeve move up and down together.

3. The transfer switching apparatus for PCB processing as claimed in claim 1, wherein the power device is an air driving device, the first driving assembly includes a first connector, a first piston and a first sleeve engaged with the first piston, the second driving assembly includes a second connector and a second sleeve, the air driving device is respectively connected to the first connector and the second connector, the first connector is connected to the first sleeve, the upper end of the first sleeve is connected to the lower end of the fixing sleeve, and under the action of the air driving device, the first piston and the first sleeve perform a telescopic motion to relatively extend or retract the jacket and the fixing sleeve; the lower end of the first sleeve is embedded in the upper end of the second sleeve and is matched with the second sleeve to form a second piston, the second joint is communicated with the second sleeve, and under the action of the air driving device, the first sleeve and the second sleeve do telescopic motion to enable the clamping sleeve and the fixed sleeve to move up and down together.

4. The transfer switching apparatus for PCB processing as claimed in claim 2 or 3, wherein the collet is a collet, a headless stud is provided at a lower end of the collet, a screw hole for engaging with a screw thread of the headless stud is provided at an upper end of the first piston, the collet is fixed to the upper end of the first piston through the headless stud, and the collet is contracted in a radial direction when the collet is contracted relative to the fixing housing, and the collet is in a clamping state for clamping the workpiece.

5. A transfer adaptor for PCB processing as claimed in claim 4, wherein said collet chuck is formed with an inverted step at an upper end thereof, said inverted step being radially contracted with respect to a lower end of said collet chuck, a plurality of bosses are provided at an end of the workpiece at intervals in a circumferential direction of the workpiece, said inverted step being radially contracted when said collet chuck is relatively contracted with respect to the housing, said inverted step being engaged with said bosses for clamping said workpiece.

6. The transfer adapter for PCB processing as claimed in claim 4, further comprising a piston ring embedded in an outer circumference of an upper end of the first piston and slidably abutting against an inner circumference of the fixing sleeve, such that the piston ring aligns an axial center of the first piston with an axial center of the fixing sleeve when the first piston and the fixing sleeve relatively move.

7. The transfer switching apparatus for PCB processing as claimed in claim 2, further comprising a positioning pin, wherein the fixing sleeve is formed with a positioning hole along a radial direction for engaging with the positioning pin, the first piston is formed with a sliding groove extending along an axial direction, an upper end of the sliding groove is located at an upper end of the first piston, a lower end of the sliding groove is located at a middle portion of the first piston, the positioning pin passes through the positioning hole and extends into the jacket, one end of the positioning pin slides relative to the sliding groove when the first piston and the jacket relatively extend or retract, and the relative extension of the first piston and the jacket is limited when the one end of the positioning pin moves to the lower end of the sliding groove.

8. The transfer adapter for PCB processing of claim 2, comprising a transfer adapter body and a base, wherein a lower end of the second piston is connected to the base, a lower end of the second piston is connected to the transfer adapter body, a lower end of the fixing sleeve is connected to an upper end of the transfer adapter body, and the transfer adapter body is moved toward or away from the base by the second piston, so that the jacket and the fixing sleeve move up and down together.

9. The transfer adapter for PCB processing as claimed in claim 8, further comprising a guide post, wherein the transfer adapter body is formed with a guide hole, a lower end of the guide post is connected to the base, an upper end of the guide post is slidably inserted into the guide hole, and the transfer adapter body moves up and down along the guide post when moving up and down.

10. The transfer and switching device for processing the PCB of claim 3, wherein the second sleeve has a bottom opened at a lower end thereof, the bottom has an outer circumference protruding outward in a radial direction than the second sleeve, the bottom closes the lower end of the second sleeve, and the bottom is further provided with a connection hole for connecting the transfer and switching device to the movable base, so that the work piece processes the PCB by the movement of the movable base.