CN211992281U

CN211992281U - Double-side slag-removing deburring machine

Info

Publication number: CN211992281U
Application number: CN202020055550.4U
Authority: CN
Inventors: 曹明星; 孙雅华
Original assignee: Suzhou Shinetek Grinding Technology Co ltd
Current assignee: Suzhou Shinetek Grinding Technology Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-11-24
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses a double-sided slag-cleaning deburring machine, which comprises a bottom surface slag-cleaning mechanism and a top surface slag-cleaning mechanism, and is characterized in that the bottom surface slag-cleaning mechanism comprises an upper magnetic adsorption belt conveying mechanism and a floating feeding device which is arranged below the upper magnetic adsorption belt conveying mechanism and is arranged along the conveying direction of parts in sequence, a lower slag-cleaning mechanism and a lower abrasive belt deburring mechanism, the floating feeding device comprises a plurality of groups of parallel annular belts, and is supported by a plurality of floating roller units aiming at each group of annular belts, each unit comprises a roller lifting support which is arranged on a base through a spring guide mechanism and a floating roller which is pivoted on the roller lifting support and is contacted with the inner side of the upper surface of the annular belt, and the unit also comprises at least one; the top surface slag removing mechanism comprises a lower magnetic adsorption belt conveying mechanism and an upper abrasive belt deburring mechanism, wherein the lower magnetic adsorption belt conveying mechanism is arranged at the downstream of the lower abrasive belt deburring mechanism and used for bearing conveyed parts, and the upper abrasive belt deburring mechanism is arranged above the lower magnetic adsorption belt conveying mechanism. The device can efficiently remove the slag and burrs on the two sides of the part and can ensure the slag removal quality.

Description

Double-side slag-removing deburring machine

Technical Field

The utility model relates to a two-sided scarfing cinder burring machine.

Background

In the field of the prior art, for parts with burrs formed on the top surface after conventional cutting, a magnetic adsorption belt conveying mechanism arranged below is mainly used for adsorbing the parts, then an abrasive belt deburring mechanism arranged above is used for removing the burrs, and a chamfering mechanism is usually used for chamfering the edges of the parts.

However, for flame and plasma cut blanked parts, the slag and burrs produced are generally concentrated primarily on the bottom surface of the part. And because many parts are plates with large size and heavy weight, after the parts are taken out from the previous working procedure, the manual work cannot turn over at all, and the safety risk of turning over by means of equipment is high. Therefore, in order to remove the burrs on the bottom surface of the part without turning over, the part positioning surface is required to be on the top surface of the part. It is apparent that conventional top deburring apparatus do not perform this function.

The top positioning type conveying equipment is designed to be matched with a slag removing and deburring mechanism arranged below the part to remove slag and burrs formed at the bottom of the part after being explored in the industry.

The top surface positioning type conveying equipment adopts an upper magnetic adsorption belt conveying mechanism to be matched with a main belt conveying mechanism located below the upper magnetic adsorption belt conveying mechanism to convey parts together, meanwhile, a slag removing hammer mechanism located below the bottom surfaces of the parts is arranged in front of the main belt conveying mechanism, large-size slag is removed firstly, then, a sand belt grinding mechanism is adopted to remove relatively fine burrs on the surfaces of the parts, and then chamfering is carried out. And finally, manually transferring the part with the bottom surface with the completely processed burrs to conventional deburring equipment to process the burrs on the top surface.

In actual practice, however, the above approach to double-sided processing of parts progressively exposes the following problems:

1) the burrs on the bottom surface and the top surface of the part are respectively removed by adopting separate equipment, the connection is poor, manual transfer is needed, and the efficiency is low;

2) according to the existing top surface positioning type conveying equipment, the belt surface of a main belt conveying mechanism of the existing top surface positioning type conveying equipment is basically in rigid contact with the bottom surface of a part, no elastic convolution room exists, and due to the fact that slag or burrs on the bottom surface of the part are uneven, a part plate can vertically shake in the conveying process, and the top surface of the part plate cannot be used as a positioning surface well to provide enough stability for the part. And once the parts are unstable in the conveying process, the slag removing effect is greatly influenced. Even when the parts are serious, some parts with larger burrs can form clamping shells, cannot be conveyed forwards, and damage equipment.

There is currently no good solution in the industry to the problems involved above.

Disclosure of Invention

The utility model provides a technical problem provide a two-sided scarfing cinder burring machine, the device can get rid of the two-sided slag of part and burr by the efficient to can ensure the scarfing cinder quality.

The technical scheme of the utility model is that: a double-sided slag-cleaning deburring machine comprises a bottom surface slag-cleaning mechanism and a top surface slag-cleaning mechanism, and is characterized in that the bottom surface slag-cleaning mechanism comprises an upper magnetic adsorption belt conveying mechanism and floating feeding devices which are positioned below the upper magnetic adsorption belt conveying mechanism and are sequentially arranged along the conveying direction of parts, and a lower slag-cleaning mechanism and a lower abrasive belt deburring mechanism, wherein each floating feeding device comprises a base, a driving roller which is arranged on the base through a driving roller bracket, a plurality of annular belts which are sleeved on the driving roller at one end and are arranged side by side, and floating roller groups which are arranged on the base and correspond to the annular belts, each floating roller group comprises a plurality of floating roller units, and each floating roller unit comprises a roller lifting bracket which is arranged on the base through a spring guide mechanism, and a floating roller which is pivotally arranged on the roller lifting bracket and is contacted with the; the floating roller group also comprises at least one tensioning roller which is arranged on the base and used for tensioning the annular belt; and the top surface slag removing mechanism comprises a lower magnetic adsorption belt conveying mechanism arranged at the downstream of the lower abrasive belt deburring mechanism and used for bearing conveyed parts and an upper abrasive belt deburring mechanism arranged above the lower magnetic adsorption belt conveying mechanism.

Further, in the utility model discloses in spring guiding mechanism including fix a plurality of longitudinal guide pole in gyro wheel lifting support bottom, locate on the base with longitudinal guide pole complex guide hole and set up the spring between gyro wheel lifting support bottom and base.

Furthermore, in the present invention, the spring guide mechanism further includes a linear bearing fixed on the base and engaged with the corresponding longitudinal guide rod.

Further, in the spring guide mechanism of the present invention, the number of the longitudinal guide rods is two, the two longitudinal guide rods are symmetrically disposed on the two sides of the spring, and the two ends of the spring are respectively fixed on the bottom of the roller lifting support and the base through screws.

Further, the utility model discloses in on tensioning gyro wheel pivot was located the tensioning gyro wheel support, and be fixed with adjust cylinder on the base, this adjust cylinder's flexible end links to each other with tensioning gyro wheel support for drive tensioning gyro wheel goes up and down in order to adjust the rate of tension of tensioning gyro wheel to endless belt.

Further, the utility model discloses in still include and link to each other and drive its rotatory driving motor through chain drive with the drive roller, and it has the main drive gyro wheel that supplies this endless belt one end cover to put to correspond each endless belt on the drive roller fixed or integrated into one piece, and is equipped with the belt slot that supplies the endless belt embedding on the main drive gyro wheel.

The lower slag removing mechanism of the utility model can refer to the known technology and mainly comprises a slag removing hammer driving unit and a lifting mechanism for driving the slag removing hammer driving unit to lift up and down. Certainly the utility model discloses in order to further promote the scarfing cinder effect, we take following scheme to lower scarfing cinder mechanism:

the automatic slag removal device comprises two groups of slag removal hammer driving units which are sequentially arranged along the conveying direction of parts and a lifting mechanism which is used for connecting and driving the two groups of slag removal hammer driving units to lift up and down, wherein each group of slag removal hammer driving unit comprises a connecting belt which is transversely arranged relative to the conveying direction of the parts, a synchronous belt driving mechanism which is connected and drives the connecting belt to run, and a plurality of slag removal hammers which are fixed on the connecting belt through an elastic connector, and the connecting belt running directions of the two groups of slag removal hammer driving units are opposite. The elastic connecting body can be a spring or rubber, and is preferably polyurethane rubber.

Further, the utility model discloses in still include feeding positioning mechanism, it is located unsteady material feeding unit directly over, and overhead magnetic adsorption belt conveyor is located feeding positioning mechanism's low reaches position, and this feeding positioning mechanism includes that locating support and pivot mount flush registration roller in a plurality of bottoms on the locating support.

Further, in the utility model discloses in overhead magnetic adsorption belt conveyor constructs and puts magnetic adsorption belt conveyor down and be known technique, all include the mechanism support promptly, install the drive roller train on the mechanism support and around putting the annular conveyor belt on the drive roller train, still including fixing on the mechanism support and being located a plurality of magnet of annular conveyor belt inboard.

Further, the utility model discloses in order to further implement the chamfer to the upper and lower edge of part, can also be including being located lower belt burr removal mechanism and putting down the lower chamfer mechanism between the magnetic adsorption belt conveyor to and be located the last chamfer mechanism of belt burr removal mechanism low reaches position. The chamfering mechanism is also known in the industry, and comprises a combined belt fixed with chamfering sand blocks, a synchronous belt driving mechanism connected with and driving the combined belt to run, and a lifting mechanism connected with and driving the synchronous belt driving mechanism to lift up and down.

The utility model discloses specific use as follows:

feeding the flame and the parts (long plates) cut and fed by the plasma into a position between the feeding positioning mechanism and the floating feeding device, so that the parts are conveyed forwards;

the part is adsorbed by the upper magnetic adsorption belt conveying mechanism, and is continuously conveyed forwards by taking the top surface as a positioning surface, in the process, the bottom surface of the part is firstly beaten by a slag removing hammer of the lower slag removing mechanism to remove large slag, and then the surface burrs are removed through the lower abrasive belt deburring mechanism and the edge of the bottom surface is chamfered through the lower chamfering mechanism.

The parts are adsorbed by the underlying magnetic adsorption belt conveying mechanism, the processed bottom surfaces are used as positioning surfaces to continue to be conveyed forwards, and in the process, the top surfaces of the parts sequentially pass through the upper abrasive belt deburring mechanism to remove burrs with smaller surfaces and the upper chamfering mechanism to chamfer the edges of the top surfaces.

Compared with the prior art, the utility model has the following advantage:

(1) the utility model discloses a two-sided scarfing cinder burring machine can get rid of the two-sided slag of part and burr by the efficient to can ensure the scarfing cinder quality. Compared with the existing processing equipment, the upper magnetic adsorption belt conveying mechanism and the lower magnetic adsorption belt conveying mechanism are directly connected for feeding without transfer, so that the production efficiency is greatly improved.

(2) The utility model discloses in designed this core component of material feeding unit that floats, its endless belt surface has the characteristic of floating, can fluctuate along with part bottom surface burr, so when it uses at cooperation magnetic adsorption belt conveyor, can regard as the locating surface top surface tightly on the magnetic adsorption belt conveyor in top as the locating surface top all the time, give the sufficient stationarity and the smooth and easy nature of part of carrying to ensure the quality of follow-up scarfing cinder.

(3) The utility model provides a material feeding unit floats, its each gyro wheel group that floats is relatively independent, and mutually noninterfere between the belt is dragged, fabulous meeting every part bottom width and the different burr of length direction distribution, can not like adopting whole strip belt whole to involve the dislocation, cause the holistic damage of belt.

(4) The utility model provides a material feeding unit floats, its simple structure, the equipment is convenient, and production is swift, has very high practicality.

(5) The lower slag removing mechanism adopts two groups of slag removing hammer driving units, and the running directions of the combined belts of the two groups of slag removing hammer driving units are opposite, so that the slag removing hammers can repeatedly hammer slag from two opposite directions, and the slag removing effect and efficiency are greatly improved.

(6) The utility model discloses a two-sided scarfing cinder burring machine, its use on the part burr less and few top surface implement the magnetic adsorption transportation as the locating surface, carry out the operation of getting rid of big slag and burr on the part bottom surface earlier, handle the part top surface again, reasonable in design can effectively improve scarfing cinder efficiency and quality.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a front view of the floating feed device of FIG. 1 in isolation;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a left side view of FIG. 2;

FIG. 5 is a schematic perspective view of FIG. 2;

fig. 6 is a schematic view of the whole structure of the slag removing hammer (the slag removing hammer on the slag removing hammer driving unit combined belt is omitted).

Wherein: A. a floating feeding device; 1. a base; 2. a drive roller support; 3. a drive roller; 4. an endless belt; 5. a roller lifting bracket; 6. a floating roller; 7. tensioning the roller; 8. a longitudinal guide bar; 9. a spring; 10. a linear bearing; 11. tensioning the roller support; 12. an adjusting cylinder; 13. a main drive roller; 14. a magnetic adsorption belt conveying mechanism is arranged on the upper part; 15. a feeding positioning mechanism; 15a, a positioning bracket; 15b, a positioning roller; 16. a part; 17. a slag removal hammer drive unit; 17a, a combined belt; 17b, a slag removal hammer; 18. a lower abrasive belt deburring mechanism; 19. a magnetic adsorption belt conveying mechanism is arranged below the magnetic adsorption belt conveying mechanism; 20. an upper abrasive belt deburring mechanism; 21. a lower chamfering mechanism; 22. go up chamfer mechanism.

Detailed Description

Example 1: the specific embodiment of the double-sided slag-cleaning deburring machine of the utility model is shown in the attached figures 1-6,

firstly, as shown in fig. 1, the double-sided slag-cleaning deburring machine comprises a bottom slag-cleaning mechanism and a top slag-cleaning mechanism, wherein the bottom slag-cleaning mechanism comprises a feeding positioning mechanism 15 positioned above, an upper magnetic adsorption belt conveying mechanism 14 positioned at the downstream position of the feeding positioning mechanism 15, a floating feeding device a, a lower slag-cleaning mechanism, a lower abrasive belt deburring mechanism 18 and a lower chamfering mechanism 21, the floating feeding device a is positioned below the upper magnetic adsorption belt conveying mechanism 14 and is sequentially arranged along the conveying direction of a part 16, and the feeding positioning mechanism 15 is positioned right above the floating feeding device a. As shown in fig. 1 and 6, the feeding positioning mechanism 15 in this embodiment is composed of a

positioning bracket

15a and 4 positioning rollers 15b which are pivotally mounted on the positioning bracket 15a and are arranged in parallel and have flush bottoms.

The floating feeding device a is a core structure design of the present application, and is specifically shown in fig. 2 to 5, and is composed of a base 1, a driving roller 3 mounted on the base 1 through a driving

roller bracket

2, 10 endless belts 4 with one ends sleeved on the driving roller 3 and arranged side by side, a floating roller set mounted on the base 1 and arranged corresponding to the endless belts 4, and a driving motor (not shown in the figure) connected with the driving roller 3 through a chain transmission mechanism and driving the driving roller 3 to rotate.

As shown in fig. 1, each floating roller set in this embodiment is composed of 5 floating roller units and a tension roller 7 for tensioning the endless belt 4, which is disposed on the base 1 through the elevation adjustment mechanism.

Each floating roller unit comprises a roller lifting support 5 arranged on the base through a spring guide mechanism and a floating roller 6 which is pivotally arranged on the roller lifting support 5 and is contacted with the inner side of the upper surface of the annular belt 4. The spring guide mechanism comprises two longitudinal guide rods 8 fixed at the bottom of the roller lifting support 5, guide holes arranged on the base 1 and matched with the longitudinal guide rods 8, and springs 9 arranged between the bottom of the roller lifting support 5 and the base 1. The two longitudinal guide rods 8 are symmetrically arranged at two sides of the spring 9, and two ends of the spring 9 are respectively fixed at the bottom of the roller lifting bracket 5 and the base 1 through screws. And in particular as shown in fig. 2, said spring guide mechanism in this embodiment also has linear bearings 10 fixed to the base 1 and cooperating with the respective longitudinal guides 8.

As shown in fig. 2, the lifting adjusting mechanism for adjusting the tension roller 7 in this embodiment is composed of a tension roller bracket 11 and an adjusting cylinder 12 fixed to the base 1. The tensioning roller 7 is pivotally arranged on the tensioning roller bracket 11, and the telescopic end of the adjusting cylinder 12 is connected with the tensioning roller bracket 11 and used for driving the tensioning roller 7 to lift so as to adjust the tension of the tensioning roller 7 on the annular belt 4.

In this embodiment, the driving roller 3 is integrally formed with a main driving roller 13 corresponding to each of the endless belts 4, and a belt groove for embedding the endless belt 4 is formed on the main driving roller 13, as shown in fig. 3 to 5.

Referring to fig. 1, the lower slag removing mechanism in this embodiment includes two sets of slag removing hammer driving units 17 sequentially arranged along the conveying direction of the component 16 and a lifting mechanism (not shown) connected to and driving the two sets of slag removing hammer driving units to lift up and down, each set of slag removing hammer driving unit 17 includes a coupling belt 17a transversely arranged with respect to the conveying direction of the component 16, a synchronous belt driving mechanism connected to and driving the coupling belt 17a to operate, and a plurality of slag removing hammers 17b fixed on the coupling belt 17a through elastic connectors, and the coupling belts 17a of the two sets of slag removing hammer driving units have opposite operating directions, wherein the elastic connectors are column-shaped bodies made of polyurethane rubber, and threaded holes are provided at both ends thereof, one threaded hole is matched with a threaded section on the slag removing hammer 17b to fix the slag removing hammer, and the other threaded hole is matched with a screw to be fixed with the coupling belt 17 a.

As shown in fig. 1, the top surface slag removing mechanism is composed of a lower magnetic adsorption belt conveying mechanism 19 disposed downstream of the lower abrasive belt deburring mechanism 18 for receiving the conveyed parts 16, and an upper abrasive belt deburring mechanism 20 and an upper chamfering mechanism 22 disposed above the lower magnetic adsorption belt conveying mechanism 19 and sequentially arranged along the conveying direction of the parts 16.

In this embodiment, the upper magnetic adsorption belt conveying mechanism 14 and the lower magnetic adsorption belt conveying mechanism 19 are both known technologies, and each of the upper magnetic adsorption belt conveying mechanism and the lower magnetic adsorption belt conveying mechanism includes a mechanism support, a driving roller set mounted on the mechanism support, an annular conveying belt wound around the driving roller set, and a plurality of magnets fixed on the mechanism support and located inside the annular conveying belt.

The lower chamfering mechanism 21 and the upper chamfering mechanism 22 are known in the industry, and are composed of a combined belt fixed with chamfering sand blocks, a synchronous belt driving mechanism connected with and driving the combined belt to run, and a lifting mechanism connected with and driving the synchronous belt driving mechanism to lift up and down.

The utility model discloses specific use as follows:

referring specifically to fig. 1, flame and plasma cut-off parts 16 (long sheets) are fed between the feed positioning mechanism 15 and the floating feeder a, so that the parts 16 are conveyed forward;

the part 16 is adsorbed by the upper magnetic adsorption belt conveying mechanism 14, and is continuously conveyed forwards by taking the top surface as a positioning surface, in the process, the bottom surface of the part 16 is firstly beaten by the slag removing hammers 17b in the two groups of slag removing hammer driving units of the lower slag removing mechanism, large slag is removed, and then surface burrs are removed through the lower abrasive belt deburring mechanism 18 in sequence and the edge of the bottom surface is chamfered through the lower chamfering mechanism 21.

The part 16 is adsorbed by a lower magnetic adsorption belt conveying mechanism 19, and is conveyed forwards continuously by taking the processed bottom surface as a positioning surface, and in the process, the top surface of the part 16 sequentially passes through an upper abrasive belt deburring mechanism 20 to remove burrs with smaller surfaces and an upper chamfering mechanism 22 to chamfer the edge of the top surface.

The above-mentioned embodiments are only for illustrating the technical concept 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 to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims

1. The utility model provides a two-sided scarfing cinder burr machine, including bottom surface scarfing cinder mechanism and top surface scarfing cinder mechanism, its characterized in that bottom surface scarfing cinder mechanism is including overhead magnetic adsorption belt conveyor (14) and be located its below and along unsteady material feeding unit (A) that part (16) direction of delivery arranged in proper order, lower scarfing cinder mechanism and lower abrasive band deburring mechanism (18), wherein unsteady material feeding unit includes base (1), install drive roller (3) on base (1) through drive roller support (2), a plurality of endless belts (4) that one end overlaps on drive roller (3) and set up side by side and install on base (1) and correspond the unsteady gyro wheel system that each endless belt (4) set up, every unsteady gyro wheel system includes a plurality of gyro wheel units that float, every gyro wheel unit all includes gyro wheel lift support (5) and pivot that locate on the base through spring guiding mechanism locate on gyro wheel lift support (5) and go up with endless belt (4) on the surface A floating roller (6) contacted with the inner side of the surface; the floating roller group also comprises at least one tensioning roller (7) which is arranged on the base (1) and used for tensioning the annular belt (4); the top surface slag removing mechanism comprises a lower magnetic adsorption belt conveying mechanism (19) arranged at the downstream of the lower abrasive belt deburring mechanism (18) and used for receiving and conveying parts (16) and an upper abrasive belt deburring mechanism (20) arranged above the lower magnetic adsorption belt conveying mechanism (19).

2. A double-sided slag and burr removing machine according to claim 1, characterized in that the spring guide mechanism comprises a plurality of longitudinal guide rods (8) fixed at the bottom of the roller lifting bracket (5), guide holes arranged on the base (1) and matched with the longitudinal guide rods (8), and springs (9) arranged between the bottom of the roller lifting bracket (5) and the base (1).

3. A machine for both-sided removal of slag and burring according to claim 2, characterized in that the spring guide means further comprise linear bearings (10) fixed on the base (1) and cooperating with the respective longitudinal guides (8).

4. A double-sided slag and burr removing machine according to claim 2 or 3, characterized in that in the spring guide mechanism, the number of the longitudinal guide rods (8) is two, the longitudinal guide rods are symmetrically positioned at two sides of the spring (9), and two ends of the spring (9) are respectively fixed on the bottom of the roller lifting bracket (5) and the base (1) through screws.

5. A double-sided slag and burr removing machine according to claim 1, characterized in that the tensioning roller (7) is pivotally mounted on a tensioning roller bracket (11), and an adjusting cylinder (12) is fixed to the base (1), the telescopic end of the adjusting cylinder (12) being connected to the tensioning roller bracket (11) for driving the tensioning roller (7) to rise and fall to adjust the tension of the tensioning roller (7) on the endless belt (4).

6. A double-sided slag and burr removing machine according to claim 1, characterized in that it further comprises a drive motor connected with the drive roller (3) via a chain transmission mechanism and driving it to rotate, and a main drive roller (13) for sleeving one end of the endless belt (4) is fixed or integrally formed on the drive roller (3) corresponding to each endless belt (4), and a belt groove for embedding the endless belt (4) is provided on the main drive roller (13).

7. A double-sided slag-cleaning deburring machine as claimed in claim 1, characterized in that said lower slag-cleaning mechanism comprises two sets of slag-cleaning hammer driving units (17) arranged in sequence along the conveying direction of the part (16) and a lifting mechanism connected to drive the two sets of slag-cleaning hammer driving units to lift up and down, each set of slag-cleaning hammer driving unit (17) comprises a gang belt (17 a) arranged transversely relative to the conveying direction of the part (16), a synchronous pulley driving mechanism connected to and driving the gang belt (17 a) to run, and a plurality of slag-cleaning hammers (17 b) fixed on the gang belt (17 a) through elastic connectors, and the operation directions of the gang belts (17 a) of the two sets of slag-cleaning hammer driving units are opposite.

8. A double-sided slag and burr removing machine according to claim 1, characterized in that it further comprises a feed positioning mechanism (15) located directly above the floating feed device (a), and an overhead magnetic adsorption belt conveyor mechanism (14) located downstream of the feed positioning mechanism (15), the feed positioning mechanism (15) comprising a positioning bracket (15 a) and a plurality of flush-bottomed positioning rollers (15 b) pivotally mounted on the positioning bracket (15 a).

9. A double-sided slag and burr removing machine according to claim 1, characterized in that the upper magnetic adsorption belt conveying mechanism (14) and the lower magnetic adsorption belt conveying mechanism (19) comprise a mechanism bracket, a driving roller group arranged on the mechanism bracket, an annular conveying belt wound on the driving roller group, and a plurality of magnets fixed on the mechanism bracket and positioned at the inner side of the annular conveying belt.

10. A double-sided slag and burr removing machine according to claim 1, characterized in that it further comprises a lower chamfering mechanism (21) between the lower belt deburring mechanism (18) and the lower magnetically-attracted belt conveyor mechanism (19), and an upper chamfering mechanism (22) downstream of the upper belt deburring mechanism (20).