CN222608737U - Multi-station drilling machine - Google Patents

Abstract

The application relates to a multi-station drilling machine which comprises a base and a group of processing tables, wherein the processing tables are oppositely arranged on the base, the processing tables comprise rotating parts and a material bearing platform, the material bearing platform is rotatably arranged on the base, the rotating parts are connected with the material bearing platform and are used for driving the rotating parts to rotate, and a drilling mechanism is arranged on the base and comprises a support frame, a group of drilling machines and a group of lifting mechanisms, and the support frame is arranged on the base. Meanwhile, the batch of workpieces can be fed and discharged according to the processing condition, so that the feeding and discharging frequency is reduced.

Description

Multi-station drilling machine

Technical Field

The application relates to the technical field of machining of mechanical parts, in particular to a multi-station drilling machine.

Background

In the field of machining, machining of annular perforated mechanical parts is an important task, and such parts are common, for example, flange plates, gears, bearing seats, connecting rings and other mechanical parts, and due to the requirement of fixed installation, drilling is usually performed, and high efficiency and high quality are required to be ensured in the machining process.

However, when the existing drilling machine is used for machining an annular mechanical part with holes, a mode of clamping a workpiece at a time is generally adopted, and the workpiece loading and unloading process is easy to cause due to the fact that the workpiece loading and unloading process is frequent in a manual discharging, drilling and finally manual material taking mode, the operation continuity of drilling equipment is affected, and the machining efficiency of the part is affected.

Meanwhile, the frequent feeding and discharging processes also increase the possibility of operation errors, thereby influencing the machining precision and consistency of parts.

In order to solve the problems, a multi-station drilling machine is designed.

Disclosure of utility model

The embodiment of the application provides a multi-station drilling machine, which aims to solve the problems that when the existing drilling machine is used for processing annular mechanical parts with holes, a single workpiece clamping mode is adopted, so that the workpiece loading and unloading processes are frequent, and the processing efficiency of the parts is affected.

In a first aspect, there is provided a multi-station drilling machine comprising:

A base;

a set of processing stations, which are oppositely arranged on the base and are used for placing workpieces;

the processing platform comprises a rotating piece and a material bearing platform, the material bearing platform is rotatably arranged on the base, the rotating piece is connected with the material bearing platform and used for driving the rotating piece to rotate, and a plurality of processing stations are arranged on the material bearing platform;

The drilling mechanism is arranged on the base and used for drilling a machined part;

The drilling mechanism comprises a supporting frame, a group of drilling machines and a group of lifting mechanisms, wherein the supporting frame is arranged on the base, the lifting mechanisms are oppositely arranged on the supporting frame, and the lifting mechanisms are connected with the drilling machines and used for driving the drilling machines to lift.

In some embodiments, the rotating member includes a limiting disc, two driving bearings, a driving bearing, a driving motor and a speed reducer, where the limiting disc is disposed on the base, the material bearing platform is rotatably disposed inside the limiting disc, the two driving bearings are relatively rotatably disposed inside the base, the driving bearing is rotatably disposed inside the base and is engaged with the two driving bearings;

The driving bearing top end is connected with the bottom end of the material bearing platform, the driving motor and the speed reducer are arranged inside the base, the output shaft of the driving motor is connected with the input shaft of the speed reducer, and the output shaft of the speed reducer is connected with one side of the bottom end of the driving bearing.

In some embodiments, the processing station comprises a discharge seat, the discharge seat is embedded and arranged on the material bearing platform, a positioning pin is arranged on the discharge seat, and a drilling hole is arranged on the discharge seat.

In some embodiments, the support frame includes two supporting seats, two the supporting seats are set up relatively on the base, be provided with the slide bar on the supporting seat relatively, four be provided with the roof between the slide bar top, slide between two adjacent slide bar outsides and be provided with the fly leaf.

In some embodiments, the lifting mechanism comprises an electric push rod, the electric push rod is arranged at the bottom of the top plate, and a piston rod of the electric push rod is connected with the drilling machine.

In some embodiments, the drills are disposed on a movable plate, the drills being located above corresponding material bearing platforms.

In some embodiments, the waste recycling mechanism further comprises a recycling bin and a slide, the recycling bin is arranged on the base, the recycling bin is provided with a cavity for recycling waste, the slide is arranged between the two material bearing platforms, and one side of the slide, close to the recycling bin, is inclined downwards.

In some embodiments, the dust removing device further comprises a dust removing mechanism, the dust removing mechanism comprises a shell, a fan, a dust hood and a waste box, the shell is arranged between the tops of the two supporting seats, the fan is arranged on the shell, an air inlet of the fan is communicated with the shell, the dust hood is arranged on the shell, the dust hood is arranged between the tops of the two material bearing platforms, and the waste box is inserted into the shell.

The embodiment of the application provides a multi-station drilling machine, which realizes simultaneous processing of a plurality of annular perforated workpieces through a base, a rotating part, a material bearing platform, a processing station, a supporting frame, the drilling machine and a lifting mechanism, and maintains the continuity of drilling processing in the process of feeding and discharging the workpieces, thereby greatly improving the processing efficiency. Meanwhile, the batch of workpieces can be fed and discharged according to the processing condition, so that the frequency of feeding and discharging is reduced, and the possibility of operating errors is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a three-dimensional structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a three-dimensional structure according to an embodiment of the present application;

FIG. 3 is a right side view of an embodiment of the present application;

FIG. 4 is a front cross-sectional view of an embodiment of the present application;

fig. 5 is a schematic view of a three-dimensional structure of a support frame according to an embodiment of the present application;

fig. 6 is a right side cross-sectional view of a dust removing mechanism according to an embodiment of the present application.

The device comprises a base, a processing table, a 21, a rotating part, a 211, a limiting disc, a 212, a driving bearing, a 213, a transmission bearing, a 214, a driving motor, a 215, a speed reducer, a 22, a material bearing platform, a 23, a processing position, a 231, a material discharging seat, a 232, a locating pin, a 3, a drilling mechanism, a 31, a supporting frame, a 311, a supporting seat, a 312, a sliding rod, a 313, a top plate, a 314, a movable plate, a 32, a drilling machine, a 33, a lifting mechanism, a 4, a waste recycling mechanism, a 41, a recycling bin, a 42, a slideway, a 5, a dust removing mechanism, a 51, a shell, a 52, a fan, a 53, a dust hood, a 54 and a waste box.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a multi-station drilling machine, which can solve the problems that when the existing drilling machine in the related art processes annular mechanical parts with holes, a single workpiece clamping mode is usually adopted, so that the workpiece loading and unloading processes are frequent, and the processing efficiency of the parts is affected.

Referring to fig. 1-3, a multi-station drilling machine comprises a base 1, a group of processing tables 2 and a drilling mechanism 3, wherein the group of processing tables 2 are oppositely arranged on the base 1 and used for placing workpieces, the processing tables 2 comprise a rotating piece 21 and a material bearing platform 22, the material bearing platform 22 is rotatably arranged on the base 1, the rotating piece 21 is connected with the material bearing platform 22 and used for driving the rotating piece 21 to rotate, a plurality of processing stations 23 are arranged on the material bearing platform 22, the drilling mechanism 3 is arranged on the base 1 and used for drilling the workpieces, the drilling mechanism 3 comprises a support frame 31, a group of drilling machines 32 and a group of lifting mechanisms 33, the support frame 31 is arranged on the base 1, and the group of lifting mechanisms 33 are oppositely arranged on the support frame 31, and the lifting mechanisms 33 are connected with the drilling machines 32 and used for driving the drilling machines 32 to lift.

In actual operation, a workpiece is placed on the carrying platform 22 of the processing platform 2, a plurality of processing stations 23 are arranged on the carrying platform 22, each processing station can be used for placing one workpiece, the carrying platform 22 is rotatably arranged on the base 1, and the workpiece can be conveniently moved from one processing station to the other.

When the work piece is properly placed, the drilling mechanism 3 starts to work, the drilling mechanism 3 comprises a supporting frame 31, a group of drilling machines 32 and a group of lifting mechanisms 33, the supporting frame 31 is firmly arranged on the base 1, the supporting frames 32 and the lifting mechanisms 33 are provided, the lifting mechanisms 33 are oppositely arranged on the supporting frame 31 and are connected with the drilling machines 32, when the work piece needs to be drilled, the lifting mechanisms 33 drive the drilling machines 32 to lift, so that the drill bit of the drilling machines 32 can be accurately aligned with the drilling position on the work piece, once the drill bit is aligned with the drilling position, the drilling machines 32 start to work, the purpose of drilling is achieved, the rotating piece 21 of the processing table 2 can drive the material bearing platform 22 to rotate in the whole drilling process, the work piece is moved to the next processing station, or the work piece with the drilling is moved out, and the next work piece is placed and drilled.

Through the mode, the simultaneous processing of a plurality of annular perforated workpieces is realized, the continuity of drilling processing is maintained in the process of feeding and discharging the workpieces, and the processing efficiency is greatly improved. Meanwhile, the batch of workpieces can be fed and discharged according to the processing condition, so that the frequency of feeding and discharging is reduced, and the possibility of operating errors is reduced.

It should be noted that the working principle is merely a basic description of the multi-station drilling machine, and the actual apparatus may further comprise other auxiliary mechanisms and functions, such as sensors, cooling systems, etc., to further optimize the machining process and improve the performance of the apparatus.

Specifically, as shown in fig. 2 and 4, in this embodiment, the rotating member 21 includes a limiting disc 211, two driving bearings 212, a transmission bearing 213, a driving motor 214 and a speed reducer 215, where the limiting disc 211 is disposed on the base 1, the material bearing platform 22 is rotatably disposed inside the limiting disc 211, two driving bearings 212 are rotatably disposed inside the base 1, the transmission bearing 213 is rotatably disposed inside the base 1 and between the two driving bearings 212, the two driving bearings 212 and the transmission bearing 213 are meshed with each other, the top end of the driving bearing 212 is connected with the bottom end of the material bearing platform 22, the driving motor 214 and the speed reducer 215 are both disposed inside the base 1, an output shaft of the driving motor 214 is connected with an input shaft of the speed reducer 215, and an output shaft of the speed reducer 215 is connected with the bottom end of one driving bearing 212.

The limiting plate 211 is arranged on the base 1, provides reference and limitation for the rotation of the material bearing platform 22, and ensures the stability and accuracy of the material bearing platform in the rotation process.

The two driving bearings 212 are rotatably arranged in the base 1 relatively, and are meshed with the driving bearing 213 to form a gear transmission system, the driving bearing 213 is rotatably arranged in the base 1 and is positioned between the two driving bearings 212 to transmit power, and when the driving bearings 212 rotate, the driving bearings transmit the power to the other driving bearing 212 through the driving bearing 213, so that the continuous rotation of the material bearing platform 22 is realized.

The driving motor 214 and the speed reducer 215 are both arranged inside the base 1, the driving motor 214 provides power for the whole rotating system, the speed reducer 215 is used for adjusting the output speed and torque of the driving motor 214, the output shaft of the driving motor 214 is connected with the input shaft of the speed reducer 215, the output shaft of the speed reducer is connected with the bottom end of the driving bearing 212 on one side, and when the driving motor 214 is started, the driving bearing 212 is driven to rotate through the speed reducer 215, so that the material bearing platform 22 is driven to rotate.

It should be noted that, as shown in fig. 2, the processing station 23 in this embodiment includes a discharging seat 231, the discharging seat 231 is embedded on the material bearing platform 22, a positioning pin 232 is disposed on the discharging seat 231, and a drill hole is disposed on the discharging seat 231.

The positioning pin 232 has the function of ensuring the accurate positioning of the workpiece on the discharging seat, when the workpiece is placed on the discharging seat 231, the positioning pin 232 is matched with a preset hole site or a specific structure on the workpiece, so that the workpiece can be rapidly and accurately positioned, in addition, the position of the drilled hole corresponds to the drill bit of the drilling mechanism 3, and the drill bit can accurately and efficiently penetrate the drilled hole to process the workpiece in the processing process. The size and the position of the drilling hole are carefully designed to meet the requirements of different workpieces and processing.

In the working process, the workpiece is firstly placed on the discharging seat 231 and is precisely positioned through the positioning pin 232, then the material bearing platform 22 rotates under the driving of the rotating piece 21 to bring the workpiece to the lower part of the drilling mechanism 3, the drill bit of the drilling machine 32 processes the workpiece through the drilling on the discharging seat 231, and the whole processing process realizes automation and serialization, so that the processing efficiency is greatly improved.

Further, in this embodiment, the supporting frame 31 includes two supporting seats 311, two supporting seats 311 are oppositely disposed on the base 1, sliding bars 312 are oppositely disposed on the supporting seats 311, a top plate 313 is disposed between tops of four sliding bars 312, and a movable plate 314 is slidably disposed between outer sides of two adjacent sliding bars 312.

The two supporting seats 311 are oppositely arranged on the base 1, and the symmetrical layout not only enhances the overall stability of the supporting frame, but also helps to ensure the balance of the drilling mechanism during operation.

The top plate 313 serves as a superstructure of the support base 311 to provide additional support and stability to the drilling mechanism 3, and may also serve as a platform for mounting other auxiliary components, such as a guide or safety guard.

The design of the movable plate 314 enables the supporting frame 31 to have certain adjustability, and fine adjustment of the height or position of the drilling mechanism 3 can be achieved by adjusting the position of the movable plate 314 so as to adapt to the sizes and shapes of different workpieces.

It can be understood that the support seat 311 in this embodiment is provided with a sliding hole for the drilling machine 32 to slide up and down.

Specifically, the lifting mechanism 33 in this embodiment includes an electric push rod disposed at the bottom of the top plate 313, and a piston rod of the electric push rod is connected to the drilling machine 32.

The electric push rod is a device for converting electric energy into mechanical energy, a piston rod of the electric push rod is directly connected with the drilling machine 32, and when the electric push rod works, the piston rod of the electric push rod extends or retracts, so that the drilling machine 32 is driven to perform lifting movement.

In the working process, an operator can adjust the height of the drilling machine by controlling the expansion and contraction amount of the electric push rod according to the size and the processing requirement of the workpiece, when the drilling process is required, the electric push rod pushes the drilling machine 32 to descend to a proper position, so that the drill bit can accurately contact and penetrate the workpiece, and after the processing is completed, the electric push rod acts again to lift the drilling machine 32 to the original position so as to carry out the next processing operation.

In addition, the design of the lifting mechanism also takes into account safety factors. In the telescoping process of the electric push rod, the lifting movement of the drilling machine can be ensured to be stable and reliable through the corresponding safety protection device and the control circuit, and the occurrence of accidents is avoided.

Specifically, the drilling machine 32 in this embodiment is disposed on the movable plate 314, and the drilling machine 32 is located above the corresponding material bearing platform 22, where the drilling machine 32 includes a second driving motor, a second speed reducer, a housing, and a drill chuck.

The drilling machine 32 is located the top of corresponding material bearing platform 22, and drilling machine 32 can carry out accurate processing to the machined part on the material bearing platform 22, and the rotatory function of material bearing platform 22 makes the machined part pass through the drilling machine below in proper order, realizes multistation continuous processing, has improved machining efficiency greatly.

The detailed structure of the drilling machine 32 comprises a second driving motor, a second speed reducer, a shell and a drill chuck, wherein the second driving motor provides power for the drilling machine, the second speed reducer transmits the power to the drill chuck, the drill chuck is responsible for clamping a drill bit, the stability and the precision of the drill bit in the machining process are ensured, and the shell plays roles of protecting an internal mechanism and reducing noise.

In the working process, the driving motor II is started, the drill chuck is driven to rotate through the speed reducer II, and the drill bit clamped by the drill chuck drills a workpiece under the driving of the motor.

As a preferred example, the present embodiment further comprises a waste recycling mechanism 4 comprising a recycling bin 41 and a chute 42, wherein the recycling bin 41 is disposed on the base 1, the recycling bin 41 has a chamber for recycling waste, the chute 42 is disposed between the two material-receiving platforms 22, and one side of the chute 42 near the recycling bin 41 is inclined downward.

The recovery bin 41 is firmly provided on the base 1, and the chamber has enough space to accommodate waste and scrap generated during drilling, ensuring that the waste can be effectively collected and stored in the recovery bin, avoiding pollution to the working environment.

The chute 42 is arranged between the two material-bearing platforms 22, and one side of the chute, which is close to the recycling bin 41, is inclined downwards, so that accessories can smoothly slide into the recycling bin 41 along the chute 42.

Further, as shown in fig. 1 and 6, the dust removing mechanism 5 further comprises a shell 51, a fan 52, a dust hood 53 and a waste box 54, wherein the shell 51 is arranged between the tops of the two supporting seats 311, the fan 52 is arranged on the shell 51, an air inlet of the fan 52 is communicated with the shell 51, the dust hood 53 is arranged on the shell 51, the dust hood 53 is positioned between the tops of the two material bearing platforms 22, and the waste box 54 is inserted into the shell 51, the shell 51 is L-shaped, the dust hood 53 is communicated with the shell 51, and a filter screen is arranged on the air inlet of the fan 52.

The fan 52 is on the casing 51, and its air intake communicates with casing 51 inside, and when fan 52 starts, it can produce powerful suction, and the dust that produces in the drilling is inhaled inside casing 51, in order to guarantee that fan 52 receives the damage, has still set up the filter screen on the fan 52 air intake especially.

The dust hood 53 is located between the tops of the two material bearing platforms 22, so that the dust hood 53 can be directly aligned with a drilling area, dust generated during drilling can be effectively collected, and the dust hood is communicated with the inside of the shell 51, so that sucked dust can be ensured to smoothly enter the shell 51.

The waste box 54 is inserted into the housing 51 for collecting dust sucked by the fan 52, and the design of the waste box 54 makes dust cleaning simple and convenient, and only the waste box 54 needs to be taken out periodically for cleaning.

It will be appreciated that the housing 51 is provided with a side door.

The present embodiment further includes a controller electrically connected to the drill 32, the lifting mechanism 33, the driving motor 214, and the blower 52, respectively.

The controller is responsible for coordinating and managing the operation of the various components, and is electrically connected to the drill 32, the lifting mechanism 33, the drive motor 214, and the blower 52, respectively, and by means of precise control signals, ensures that these components are capable of cooperating in accordance with predetermined procedures and requirements.

Specifically, the controller provides precise control of the drilling process by sending control signals to the drill 32, including controlling the rotational speed of the drill bit, the feed rate, and the drilling depth to meet different machining requirements.

The controller is also responsible for controlling the operation of the lifting mechanism 33. By sending corresponding control signals, the controller can accurately adjust the height and position of the drilling machine so that the drilling machine can accurately contact a workpiece and perform drilling operations.

In addition, the controller is electrically connected to the drive motor 214. Through the rotational speed and the direction of control driving motor, the rotation control to the material bearing platform can be realized to the controller to ensure that the machined part can process through the drilling machine below in proper order.

The controller is also responsible for controlling the opening and closing of the blower 52, and during the drilling process, when dust needs to be removed, the controller sends a signal to start the blower to start working. By adjusting the power and operating time of the blower 52, the operating environment is maintained clean.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intervening medium, or may be in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

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

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A multi-station drilling machine, comprising:

a base (1);

a set of processing tables (2) which are oppositely arranged on the base (1) and are used for placing workpieces;

The processing table (2) comprises a rotating piece (21) and a material bearing platform (22), the material bearing platform (22) is rotatably arranged on the base (1), the rotating piece (21) is connected with the material bearing platform (22) and is used for driving the rotating piece (21) to rotate, and a plurality of processing stations (23) are arranged on the material bearing platform (22);

a drilling mechanism (3) which is arranged on the base (1) and is used for drilling a workpiece;

The drilling mechanism (3) comprises a supporting frame (31), a group of drilling machines (32) and a group of lifting mechanisms (33), wherein the supporting frame (31) is arranged on the base (1), the lifting mechanisms (33) are oppositely arranged on the supporting frame (31), and the lifting mechanisms (33) are connected with the drilling machines (32) and used for driving the drilling machines (32) to lift.

2. A multi-station drilling machine as defined in claim 1, wherein:

The rotary part (21) comprises a limiting disc (211), two driving bearings (212), a transmission bearing (213), a driving motor (214) and a speed reducer (215), wherein the limiting disc (211) is arranged on the base (1), the material bearing platform (22) is rotatably arranged inside the limiting disc (211), the two driving bearings (212) are rotatably arranged inside the base (1) relatively, the transmission bearing (213) is rotatably arranged inside the base (1) and is meshed with the two driving bearings (212) and the transmission bearing (213) mutually;

The top end of the driving bearing (212) is connected with the bottom end of the material bearing platform (22), the driving motor (214) and the speed reducer (215) are both arranged inside the base (1), an output shaft of the driving motor (214) is connected with an input shaft of the speed reducer (215), and an output shaft of the speed reducer (215) is connected with one side of the bottom end of the driving bearing (212).

3. A multi-station drilling machine as defined in claim 1, wherein:

The processing position (23) comprises a discharging seat (231), the discharging seat (231) is embedded and arranged on the material bearing platform (22), a positioning pin (232) is arranged on the discharging seat (231), and a drilling hole is formed in the discharging seat (231).

4. A multi-station drilling machine as defined in claim 1, wherein:

the support frame (31) comprises two support seats (311), two the support seats (311) are oppositely arranged on the base (1), slide bars (312) are oppositely arranged on the support seats (311), a top plate (313) is arranged between the tops of four slide bars (312), and a movable plate (314) is slidably arranged between the outer sides of two adjacent slide bars (312).

5. A multi-station drilling machine as defined in claim 4, wherein:

the lifting mechanism (33) comprises an electric push rod, the electric push rod is arranged at the bottom of the top plate (313), and a piston rod of the electric push rod is connected with the drilling machine (32).

6. A multi-station drilling machine as defined in claim 4, wherein:

the drilling machine (32) is arranged on the movable plate (314), and the drilling machine (32) is positioned above the corresponding material bearing platform (22).

7. A multi-station drilling machine as defined in claim 1, wherein:

Still include waste recovery mechanism (4) including retrieving storehouse (41) and slide (42), retrieve storehouse (41) setting on base (1), retrieve storehouse (41) have the cavity that is used for waste recovery, slide (42) set up two hold between material platform (22), just slide (42) are close to retrieve storehouse (41) one side downward sloping.

8. A multi-station drilling machine as defined in claim 4, wherein:

Still include dust removal mechanism (5), it includes casing (51), fan (52), suction hood (53) and waste material box (54), casing (51) set up between two supporting seat (311) tops, fan (52) set up on casing (51), fan (52) air intake with casing (51) intercommunication, suction hood (53) set up on casing (51), and suction hood (53) are located between two material bearing platform (22) tops, waste material box (54) are pegged graft inside casing (51).