CN111958303A

CN111958303A - Device is alternated in cooling clearance of milling process

Info

Publication number: CN111958303A
Application number: CN202010898012.6A
Authority: CN
Inventors: 璧电窘; 赵羽
Original assignee: Hangzhou Wulun Machinery Technology Co ltd
Current assignee: Hangzhou Wulun Machinery Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-11-20

Abstract

The invention discloses a cooling and cleaning alternating device in a milling process, which comprises a base, wherein an inner cavity is arranged in the base, the left wall of the inner cavity is communicated with a scrap iron port with a leftward opening, the rear wall of the inner cavity is fixedly connected with two connecting blocks, the rear wall of the inner cavity is fixedly connected with a supporting block, the supporting block is positioned between the two connecting blocks, the upper wall of the inner cavity is rotatably connected with a rotating disc shaft, the rotating disc shaft is fixedly connected with a rotating disc, the lower end of the rotating disc is fixedly connected with a poking rod, and the rotating disc shaft is rotatably connected in the supporting block. The working efficiency is improved, and the input cost is reduced.

Description

Device is alternated in cooling clearance of milling process

Technical Field

The invention relates to the relevant field of milling, in particular to a cooling and cleaning alternating device in a milling process.

Background

When parts are machined in a factory, the parts are usually milled, a blank is machined mainly by means of high-speed rotation of a cutter, a large amount of heat can be generated in the milling process, meanwhile, the cutter is abraded, and therefore the surface roughness of a workpiece is influenced, cooling liquid can be added regularly during part machining, the cooling liquid is generally added manually, the operating cutter is easy to cause danger to workers, meanwhile, the workpiece and the cutter are not completely cooled, and the cooling effect is poor.

Disclosure of Invention

In order to solve the problems, the cooling and cleaning alternating device in the milling process is designed in the embodiment, the cooling and cleaning alternating device in the milling process comprises a base, an inner cavity is arranged in the base, the left wall of the inner cavity is communicated with an iron scrap opening with a leftward opening, the rear wall of the inner cavity is fixedly connected with two connecting blocks, the rear wall of the inner cavity is fixedly connected with a supporting block, the supporting block is positioned between the two connecting blocks, the upper wall of the inner cavity is rotatably connected with a rotating disc shaft, a rotating disc is fixedly connected onto the rotating disc shaft, the lower end of the rotating disc is fixedly connected with a shifting rod, the rotating disc shaft is rotatably connected into the supporting block, the supporting block is positioned on the lower side of the shifting rod, a sliding cavity with an upward opening is arranged in the upper end of the connecting block, the sliding cavity is communicated with the inner cavity, a sliding plate capable of sliding back and forth is arranged in the sliding cavity, and two sliding rods are, one side of the sliding plate between the two sliding rods, which is close to the rotating disc, is in a zigzag shape, the left end of the rotating disc is abutted against the right end of the sliding rod on the left side, the right end of the rotating disc is abutted against the left end of the sliding rod on the right side, a connecting block is fixedly arranged in the upper end of the front side of the sliding plate on the left side, a pump is fixedly arranged in the right end of the connecting block, the right end of the pump is fixedly connected with a cooling liquid pipeline, a cooling liquid channel with a downward opening is arranged in the cooling liquid pipeline, the left wall of the cooling liquid channel is communicated with the pump, a valve is arranged on the left side of the cooling liquid channel, the valve is electrically connected with the pump, the lower end of the cooling liquid pipeline is fixedly connected with a cooling liquid nozzle, a cooling liquid port with a downward opening is arranged in the cooling liquid nozzle, the upper wall, the inner cavity right wall is communicated with a guide groove, a fan shaft which slides forwards and backwards is arranged in the guide groove, the fan shaft is rotationally connected in the fixed block, the fan is fixedly connected to the left end of the fan shaft, the rotating disc shaft rotates clockwise at the moment to drive the rotating disc and the poking rod to rotate clockwise, the poking rod is meshed with the sliding plate on the left side to drive the sliding plate on the left side to move backwards, the poking rod is meshed with the sliding plate on the right side to drive the sliding plate on the right side to move forwards, the fixed block is driven to move forwards at the same time, the fan shaft is driven to slide forwards along the guide groove, the fan moves forwards to the position of a machined workpiece, and meanwhile, the fan shaft rotates to drive the fan to rotate so as to blow scrap iron on the workpiece to the left.

Beneficially, the rotating disc axle lower extreme has linked firmly rolling gear, the linking piece lower extreme has linked firmly the bracing piece, two the dead lever has been linked firmly between the bracing piece lower extreme, be equipped with the downward rack groove of opening in the dead lever lower extreme, rack inslot establish with have the slip rack of horizontal slip, slip rack front end mesh in the rolling gear rear end, this moment the slip rack is followed rack groove horizontal slip drives rolling gear is just reversing, and then drives rotating disc axle clockwise rotation or anticlockwise rotation.

Beneficially, the sliding frame is fixedly connected to the lower end of the sliding rack, a sliding groove with a downward opening is formed in the sliding frame, the upper wall of the sliding groove is communicated with the inner cavity, a motor is fixedly arranged on the lower wall of the inner cavity, the upper end of the motor is in power connection with a rotating shaft, a connecting rod is fixedly connected to the upper end of the rotating shaft, a sliding block is fixedly connected to the upper end of the left side of the connecting rod, the upper end of the sliding block extends into the sliding groove, the sliding block slides in the sliding groove from front to back, the motor is started at the moment, the rotating shaft is driven to rotate, the connecting rod is driven to rotate with the sliding block around the rotating shaft, and the sliding block slides around the sliding groove.

Advantageously, the fan shaft is fixedly connected with a driven gear, the driven gear is positioned at the right side of the fixed block, the right wall of the inner cavity is rotationally connected with a driving gear shaft and a linkage shaft, the driving gear shaft is positioned at the upper side of the linkage shaft, the left end of the driving gear shaft is fixedly connected with a driving gear, the driving gear shaft and the linkage shaft are respectively and fixedly connected with linkage belt wheels, a linkage belt is connected between the two linkage belt wheels, the right end of the motor is in power connection with a transmission shaft, the transmission shaft and the linkage shaft are respectively and fixedly connected with a transmission belt wheel, the transmission belt is connected between the two transmission belt wheels, the driving belt wheel is positioned at the left side of the linkage belt wheel, the motor is started at the moment to drive the driving shaft to rotate, and then the linkage shaft is driven to rotate, and simultaneously the driving gear shaft is driven to rotate, so that the driving gear is driven to rotate.

Beneficially, an eccentric wheel shaft is rotatably connected between the front wall and the rear wall of the inner cavity, an eccentric wheel is fixedly connected to the eccentric wheel shaft, an eccentric wheel frame capable of sliding left and right is arranged on the lower wall of the inner cavity, an eccentric wheel cavity is arranged in the eccentric wheel frame, the right end of the eccentric wheel abuts against the right wall of the eccentric wheel cavity, a push rod is fixedly connected to the left end of the eccentric wheel frame, a push plate is fixedly connected to the left end of the push rod, a synchronous belt wheel shaft is dynamically connected to the rear end of the motor, synchronous belt wheels are fixedly connected to the synchronous belt wheel shaft and the eccentric wheel shaft, a synchronous belt is connected between the two synchronous belt wheels, a temporary storage box is fixedly connected to the left wall of the inner cavity, a cavity with a right opening is arranged in the temporary storage box and communicated with the inner cavity, a discharge port with a downward opening is arranged on the lower wall, discharging channel upper wall communicate in the discharge gate, just discharging channel lower wall communicate in the inner chamber, the iron fillings of clearance this moment pass through discharging channel falls the inner chamber lower wall, start the motor drives hold-in range shaft rotates, and then drives the eccentric wheel rotates, drives simultaneously the eccentric wheel frame moves forward, and then promotes the push rod with the push pedal slides forward, and then promotes iron fillings and fall into in the iron fillings incasement to iron fillings are collected.

The invention has the beneficial effects that: according to the invention, the pump and the fan can be moved back and forth alternately through the rotating disc and the sliding plate, so that scrap iron on the workpiece and the cutter can be cleaned firstly, and then the cutter and the workpiece are cooled, the heat generated in the milling process is reduced, the workpiece and the cutter are completely cooled, meanwhile, the phenomenon that workers are scratched is avoided, a large amount of manpower and material resources are saved, the working efficiency is improved, and the investment cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the overall structure of a cooling and cleaning alternating apparatus for milling according to the present invention;

FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;

FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 1;

FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 1;

FIG. 5 is a schematic view of the structure in the direction "D-D" of FIG. 1;

FIG. 6 is an enlarged schematic view of "E" of FIG. 1;

fig. 7 is an enlarged schematic view of "F" of fig. 2.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a cooling and cleaning alternating device in a milling process, which comprises a base 11, wherein an inner cavity 12 is arranged in the base 11, the left wall of the inner cavity 12 is communicated with a scrap iron port 29 with a leftward opening, the rear wall of the inner cavity 12 is fixedly connected with two connecting blocks 45, the rear wall of the inner cavity 12 is fixedly connected with a supporting block 17, the supporting block 17 is positioned between the two connecting blocks 45, the upper wall of the inner cavity 12 is rotatably connected with a rotating disc shaft 18, the rotating disc shaft 18 is fixedly connected with a rotating disc 16, the lower end of the rotating disc 16 is fixedly connected with a poking rod 19, the rotating disc shaft 18 is rotatably connected in the supporting block 17, the supporting block 17 is positioned at the lower side of the poking rod 19, the upper end of the connecting block 45 is internally provided with a sliding cavity 46 with an upward opening, the sliding cavity 46 is communicated with the inner cavity 12, a sliding plate 57 which slides back and forth is arranged in the sliding cavity 46, the upper end of the sliding, one side of the sliding plate 57 between the two sliding rods 15, which is close to the rotating disc 16, is in a zigzag shape, the left end of the rotating disc 16 abuts against the right end of the sliding rod 15 on the left side, the right end of the rotating disc 16 abuts against the left end of the sliding rod 15 on the right side, the upper end of the front side of the sliding plate 57 on the left side is fixedly provided with a connecting block 50, the right end of the connecting block 50 is fixedly provided with a pump 51, the right end of the pump 51 is fixedly connected with a cooling liquid pipeline 52, a cooling liquid channel 53 with a downward opening is arranged in the cooling liquid pipeline 52, the left wall of the cooling liquid channel 53 is communicated with the pump 51, the left side of the cooling liquid channel 53 is provided with a valve 56, the valve 56 is electrically connected with the pump 51, the lower end of the cooling liquid pipeline 52 is fixedly connected with a cooling liquid nozzle 55, a cooling liquid port 54 with a downward opening is arranged in the cooling, a fixed block 13 is fixedly arranged in the upper end of the front side of the right sliding plate 57, the right wall of the inner cavity 12 is communicated with a guide groove 48, a fan shaft 47 which slides back and forth is arranged in the guide groove 48, the fan shaft 47 is rotationally connected in the fixed block 13, the left end of the fan shaft 47 is fixedly connected with a fan 58, at this time, the rotating disc shaft 18 rotates clockwise to drive the rotating disc 16 and the poke rod 19 to rotate clockwise, further, the poke rod 19 is meshed with the left sliding plate 57 to drive the left sliding plate 57 to move backwards, at this time, the poke rod 19 is meshed with the right sliding plate 57 to drive the right sliding plate 57 to move forwards and simultaneously drive the fixed block 13 to move forwards, further, the fan shaft 47 is driven to slide forwards along the guide groove 48, at this time, the fan 58 moves forwards to the position of a machined workpiece, and simultaneously, the fan shaft 47 rotates, the fan 58 is driven to rotate, and then the scrap iron on the workpiece is blown leftwards.

Beneficially, the rotating disc shaft 18 lower extreme has linked firmly rolling gear 38, join in marriage the piece 45 lower extreme and have linked firmly bracing piece 21, two the dead lever 20 has been linked firmly between the bracing piece 21 lower extreme, be equipped with the downward rack groove 63 of opening in the dead lever 20 lower extreme, be equipped with in the rack groove 63 with the slip rack 22 of horizontal slip, slip rack 22 front end engage in the rotating gear 38 rear end, this moment slip rack 22 is followed rack groove 63 horizontal slip drives rolling gear 38 just reverses, and then drives rotating disc shaft 18 clockwise turning or anticlockwise rotation.

Beneficially, the lower end of the sliding rack 22 is fixedly connected with a sliding frame 32, a sliding groove 28 with a downward opening is arranged in the sliding frame 32, the upper wall of the sliding groove 28 is communicated with the inner cavity 12, the lower wall of the inner cavity 12 is fixedly provided with a motor 39, the upper end of the motor 39 is in power connection with a rotating shaft 40, the upper end of the rotating shaft 40 is fixedly connected with a connecting rod 41, the upper end of the left side of the connecting rod 41 is fixedly connected with a sliding block 33, the upper end of the sliding block 33 extends into the sliding groove 28, the sliding block 33 slides in the sliding groove 28 in the front and back direction, at this moment, the motor 39 is started to drive the rotating shaft 40 to rotate, so that the connecting rod 41 and the sliding block 33 are driven to rotate circumferentially around the rotating shaft 40, and then the sliding block 33 slides in the.

Beneficially, the fan shaft 47 is fixedly connected with a driven gear 49, the driven gear 49 is located on the right side of the fixed block 13, the right wall of the inner cavity 12 is rotatably connected with a driving gear shaft 60 and a linkage shaft 70, the driving gear shaft 60 is located on the upper side of the linkage shaft 70, the left end of the driving gear shaft 60 is fixedly connected with a driving gear 59, the driving gear shaft 60 and the linkage shaft 70 are respectively fixedly connected with a linkage belt wheel 62, a linkage belt 61 is connected between the two linkage belt wheels 62, the right end of the motor 39 is dynamically connected with a transmission shaft 44, the transmission shaft 44 and the linkage shaft 70 are respectively fixedly connected with a transmission belt wheel 43, the transmission belt 42 is connected between the two transmission belt wheels 43, the transmission belt wheel 43 is located on the left side of the linkage belt wheel 62, at this time, the motor 39 is started to drive the transmission shaft 44 to rotate, and further drive the, simultaneously, the driving gear shaft 60 is driven to rotate, and the driving gear 59 is driven to rotate.

Beneficially, an eccentric wheel shaft 35 is rotatably connected between the front wall and the rear wall of the inner cavity 12, an eccentric wheel 37 is fixedly connected to the eccentric wheel shaft 35, an eccentric wheel frame 34 which slides left and right is arranged on the lower wall of the inner cavity 12, an eccentric wheel cavity 36 is arranged in the eccentric wheel frame 34, the right end of the eccentric wheel 37 abuts against the right wall of the eccentric wheel cavity 36, a push rod 31 is fixedly connected to the left end of the eccentric wheel frame 34, a push plate 30 is fixedly connected to the left end of the push rod 31, a synchronous belt wheel shaft 64 is dynamically connected to the rear end of the motor 39, synchronous belt wheels 65 are fixedly connected to the synchronous belt wheel shaft 64 and the eccentric wheel shaft 35, a synchronous belt 66 is connected between the two synchronous belt wheels 65, a temporary storage box 24 is fixedly connected to the left wall of the inner cavity 12, a cavity 23 with a rightward opening is arranged in the temporary storage box 24, the cavity, temporary storage box 24 lower extreme has linked firmly ejection of compact pipeline 26, be equipped with the downward discharging channel 27 of opening in the ejection of compact pipeline 26, discharging channel 27 upper wall communicate in discharge gate 25, just discharging channel 27 lower wall communicate in inner chamber 12, the iron fillings of clearance this moment pass through discharging channel 27 falls inner chamber 12 lower wall, start motor 39 drives hold-in range shaft 64 rotates, and then drives eccentric shaft 35 rotates, and then drives eccentric wheel 37 rotates, drives simultaneously eccentric wheel frame 34 forward motion, and then promotes push rod 31 with push pedal 30 slides forward, and then promotes iron fillings fall into in iron fillings case 71 to collect iron fillings.

The use steps of the cooling and cleaning alternating device in a milling process herein are described in detail below with reference to fig. 1 to 7: initially, the fan shaft 47 is in the rear limit position and the push plate 30 is in the right limit position.

At this time, the motor 39 is started to drive the rotating shaft 40 to rotate, and further drive the connecting rod 41 and the sliding block 33 to perform circular rotation around the rotating shaft 40, and further the sliding block 33 slides forward and backward along the sliding groove 28, and further drives the sliding rack 22 to slide rightward, and at this time, the sliding rack 22 slides rightward and rightward along the rack groove 63, and drives the rotating gear 38 to rotate forward, and at the same time, the rotating disk shaft 18 rotates clockwise, and drives the rotating disk 16 and the poke rod 19 to rotate clockwise, and further the poke rod 19 and the left sliding plate 57 to engage, and drives the left sliding plate 57 to move backward, and at this time, the poke rod 19 and the right sliding plate 57 to move forward, and at the same time, drives the fixed block 13 to move forward, and further drives the fan shaft 47 to slide forward along the guide groove 48, and at this time, the fan 58, the motor 39 drives the transmission shaft 44 to rotate, so as to drive the linkage shaft 70 to rotate, and simultaneously drives the driving gear shaft 60 to rotate, so as to drive the driving gear 59 to rotate, and simultaneously drives the driven gear 49 to rotate, so as to drive the fan shaft 47 to rotate, so as to drive the fan 58 to rotate, so as to blow scrap iron on the workpiece to the left; at this time, the rotating shaft 40 rotates to drive the connecting rod 41 and the sliding block 33 to perform a circular rotation around the rotating shaft 40, and further the sliding block 33 slides backward and then forward along the sliding groove 28, and further the sliding rack 22 slides leftward, and at this time, the sliding rack 22 slides leftward along the rack groove 63, and the rotating gear 38 is driven to rotate backward, and at the same time, the rotating disc shaft 18 rotates counterclockwise, and the rotating disc 16 and the poke rod 19 are driven to rotate counterclockwise, and further the poke rod 19 engages with the right sliding plate 57, and the right sliding plate 57 is driven to move backward, and at this time, the poke rod 19 engages with the left sliding plate 57, and further the left sliding plate 57 is driven to move forward, and at the same time, the connecting block 50 is driven to move forward, and further the pump 51 is driven to move forward, and at this time, the coolant port 54 moves forward to a position for, meanwhile, the cooling liquid is sprayed out from the cooling liquid port 54, so that the workpiece and the cutter which are being processed are cooled; the iron fillings of clearance this moment fall to inner chamber 12 lower wall through discharging channel 27, and motor 39 drives hold-in range shaft 64 and rotates, and then drives eccentric shaft 35 and rotate, and then drives eccentric wheel 37 and rotate, drives eccentric wheel frame 34 forward motion simultaneously, and then promotes push rod 31 and push pedal 30 and slides forward, and then promotes the iron fillings and falls into iron fillings case 71 to collect iron fillings.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a device is alternated in cooling clearance of milling process, includes the base, its characterized in that: an inner cavity is arranged in the base, the left wall of the inner cavity is communicated with an iron scrap opening with a leftward opening, the rear wall of the inner cavity is fixedly connected with two connecting blocks, the rear wall of the inner cavity is fixedly connected with a supporting block, the supporting block is positioned between the two connecting blocks, the upper wall of the inner cavity is rotatably connected with a rotating disc shaft, a rotating disc is fixedly connected on the rotating disc shaft, the lower end of the rotating disc is fixedly connected with a poking rod, the rotating disc shaft is rotatably connected in the supporting block, the supporting block is positioned on the lower side of the poking rod, a sliding cavity with an upward opening is arranged in the upper end of the connecting block, the sliding cavity is communicated with the inner cavity, a sliding plate which slides forwards and backwards is arranged in the sliding cavity, the upper end of the sliding plate is fixedly connected with two sliding rods, one side, close to the rotating disc, of the sliding plate between the two sliding rods, the right end of the rotating disc abuts against the left end of the right sliding rod, a connecting block is fixedly arranged in the upper end of the front side of the left sliding plate, a pump is fixedly arranged in the right end of the connecting block, the right end of the pump is fixedly connected with a cooling liquid pipeline, a cooling liquid channel with a downward opening is arranged in the cooling liquid pipeline, the left wall of the cooling liquid channel is communicated with the pump, a valve is arranged on the left side of the cooling liquid channel and electrically connected with the pump, a cooling liquid nozzle is fixedly connected to the lower end of the cooling liquid pipeline, a cooling liquid port with a downward opening is arranged in the cooling liquid nozzle, the upper wall of the cooling liquid port is communicated with the lower wall of the cooling liquid channel, a fixed block is fixedly arranged in the upper end of the front side of the right sliding plate, a guide groove is communicated with the right wall of the inner cavity, a fan shaft which slides forwards, the left end of the fan shaft is fixedly connected with a fan.

2. An alternative cooling and cleaning device in a milling process as defined in claim 1, characterized in that: the lower end of the rotating disc shaft is fixedly connected with a rotating gear, the lower end of the connecting block is fixedly connected with a supporting rod, two fixing rods are fixedly connected between the lower ends of the supporting rods, rack grooves with downward openings are formed in the lower ends of the fixing rods, sliding racks sliding left and right are arranged in the rack grooves, and the front ends of the sliding racks are meshed with the rear end of the rotating gear.

3. An alternative cooling and cleaning device in a milling process as defined in claim 2, characterized in that: the utility model discloses a slide rack, including slide rack, inner chamber, motor, connecting rod, slide rack lower extreme has linked firmly the slide frame, be equipped with the decurrent sliding tray of opening in the slide frame, the sliding tray upper wall communicate in the inner chamber, the inner chamber lower wall has set firmly the motor, motor upper end power is connected with the axis of rotation, the axis of rotation upper end has linked firmly the connecting rod, connecting rod left side upper end has linked firmly the slider, the slider upper end stretches into in the slide tray, slide around the slider.

4. An alternative cooling and cleaning device in a milling process as defined in claim 1, characterized in that: the fan shaft is fixedly connected with a driven gear, the driven gear is located on the right side of the fixed block, the right wall of the inner cavity is connected with a driving gear shaft and a linkage shaft in a rotating mode, the driving gear shaft is located on the upper side of the linkage shaft, the left end of the driving gear shaft is fixedly connected with a driving gear, the driving gear shaft is fixedly connected with linkage belt wheels and linkage belts on the linkage shaft respectively, linkage belts are connected between the linkage belt wheels, power of the right end of a motor is connected with a transmission shaft, the transmission shaft is fixedly connected with transmission belt wheels and transmission belt wheels on the linkage shaft respectively, the transmission belt wheels are connected between the transmission belt wheels, and the transmission belt wheels are located on the left.

5. An alternative cooling and cleaning device in a milling process as defined in claim 1, characterized in that: an eccentric wheel shaft is rotatably connected between the front wall and the rear wall of the inner cavity, an eccentric wheel is fixedly connected to the eccentric wheel shaft, an eccentric wheel frame sliding left and right is arranged on the lower wall of the inner cavity, an eccentric wheel cavity is arranged in the eccentric wheel frame, the right end of the eccentric wheel abuts against the right wall of the eccentric wheel cavity, a push rod is fixedly connected to the left end of the eccentric wheel frame, a push plate is fixedly connected to the left end of the push rod, a synchronous belt wheel shaft is dynamically connected to the rear end of the motor, synchronous belt wheels are fixedly connected to the synchronous belt wheel shaft and the eccentric wheel shaft, a synchronous belt is connected between the two synchronous belt wheels, a temporary storage box is fixedly connected to the left wall of the inner cavity, a cavity with a right opening is arranged in the temporary storage box and communicated with the inner cavity, a discharge port with a downward opening is arranged on the lower wall of the, the upper wall of the discharge channel is communicated with the discharge hole, the lower wall of the discharge channel is communicated with the inner cavity, and the cleaned scrap iron falls to the lower wall of the inner cavity through the discharge channel.