Pole piece burr removal system and removal effect evaluation method

Abstract

The invention discloses a pole piece burr removal system and a removal effect evaluation method, and belongs to the technical field of battery pole piece processing and manufacturing, the pole piece burr removal system comprises a wiping mechanism used for wiping a pole piece body, the wiping mechanism is provided with a first wiping area and a second wiping area, the first wiping area is provided with a first wiping body, and the second wiping area is provided with a second wiping body; the first wiping body is positioned on two sides of the surface of the pole piece body to form a linear gap for the pole piece body to pass through; the second wiping area is provided with a second wiping body, the second wiping body has elasticity, and the second wiping body is located on the two sides of the surface of the pole piece body to form wavy gaps for the pole piece body to pass through; wave crests and wave troughs of the wave-shaped gaps are continuously alternated, and the wave crests wipe the cut edge of the pole piece body when the pole piece body advances. The burr removing device can remove burrs on the cut edge of the strip-shaped pole piece.

Description

Technical Field

[0001] The invention relates to the technical field of battery pole piece processing and manufacturing, and in particular to a pole piece burr removal system and a removal effect evaluation method. Background Art

[0002] There will be burrs in the electrode cutting process. If the burrs are large, there is a risk of causing battery undervoltage or short circuit. Therefore, burr removal is particularly important in the production and manufacturing of battery electrodes. Currently, the electrodes are manually inspected to see if there are burrs and then the knife is adjusted to reduce the probability of burrs. This method is inefficient.

[0003] In the prior art, a Chinese patent document with the announcement number CN206893709U discloses a device for removing burrs from the powder of lithium-ion battery pole pieces, which is composed of an inflatable shaft, an automatic dust suction device, a brush dust removal device, a material collection barrel, and a rotary motor. The material collection barrel is fixedly mounted on the rotary motor through a rotating shaft and a bearing, and the rotary motor is fixedly connected to the inflatable shaft through a rotor. The brush dust removal device is fixedly mounted on the bottom end of the material collection barrel, and an automatic dust suction device is fixedly mounted on the other end of the brush dust removal device. When the device is running, the pole piece is placed at the inner end of the material collection barrel, and the automatic dust suction device is also connected to a powder filter through a pipeline. The brush is evenly brushed on the cutting surface and dusted by the automatic dust suction device, which can effectively remove the burrs of the cutting edge powder. However, the device removes the cutting edge burrs of the rolled pole piece by a brush, which is inconvenient to remove the burrs of the cutting edge of the pole piece in a sheet-like extended state, i.e., a strip-like pole piece.

[0004] For example, Chinese patent document with publication number CN211332529U discloses a battery pole piece deburring device, which removes burrs on the surface of a strip pole piece through the gap between a rolling brush and a roller, but it cannot remove burrs on the cut edges of the pole piece. Summary of the invention

[0005] The object of the present invention is to provide a pole piece burr removal system and a removal effect evaluation method, so as to solve the problem that the pole piece burr removal device in the prior art is inconvenient to remove burrs from the cut edges of strip-shaped pole pieces.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a pole piece burr removal system, including a wiping mechanism for wiping a pole piece body, the wiping mechanism is provided with a first wiping area and a second wiping area, the first wiping area is provided with a first wiping body, the first wiping body is located on both sides of the surface of the pole piece body to form a straight gap for the pole piece body to pass through; the second wiping area is provided with a second wiping body, the second wiping body is elastic, the second wiping body is located on both sides of the surface of the pole piece body to form a wavy gap for the pole piece body to pass through; the crests and troughs of the wavy gap alternate continuously, and the crests wipe the cut edges of the pole piece body when the pole piece body moves forward.

[0007] Through the above technical solution, the strip-shaped pole piece body can just pass through the linear gap. Both sides of the linear gap are the first wiping body, which can wipe the burrs of the pole piece body on the one hand, and clamp the pole piece body on the other hand, so that the pole piece body can be stably transported. The wavy gap makes the pole piece body have greater resistance when moving forward, prolonging the passing time of the pole piece body, that is, increasing the grinding time. The wave crest formed by the elastic second wiping body continuously collides and contacts with the cut edge of the pole piece body when the pole piece body moves forward, enhancing the wiping effect and improving the efficiency of deburring.

[0008] Furthermore, the wiping mechanism includes two groups of wiping panels, each group of wiping panels is divided into the first wiping area and the second wiping area; the first wiping bodies are provided in plurality and are arranged along the forward direction of the pole piece body in the first wiping area, and the two groups of the first wiping bodies have equal lengths and are used to clamp the two sides of the surface of the pole piece body.

[0009] The two groups of first wiping bodies on both sides of the pole piece body are of equal length, so the first wiping area can form a linear gap for the pole piece body to pass through, and can perform preliminary wiping and clamping and positioning on the pole piece body.

[0010] Furthermore, the second wiping bodies are provided in plurality and are arranged in the second wiping area along the forward direction of the pole piece body, and the second wiping bodies located on the same side of the surface of the pole piece body are arranged alternately in length with long and short ones.

[0011] The second wiping body with a longer length forms a wave crest, and the second wiping body with a shorter length forms a wave trough. The second wiping bodies with alternating lengths on both sides of the pole piece body form a wave-like gap to wipe and remove the cutting burrs of the pole piece body.

[0012] Furthermore, the hardness of the second wiping body is greater than the hardness of the first wiping body.

[0013] The second wiping body with higher hardness can increase its contact force with the cutting surface of the pole piece body, and play a role in grinding and wiping the cutting end surface of the pole piece body.

[0014] Furthermore, the wiping panel is provided with a plurality of chip removal holes for removing the burrs wiped off, thereby improving the burr removal efficiency and reducing the accumulation of burrs in the wiping mechanism.

[0015] Furthermore, it also includes a dust suction mechanism, the wiping mechanism is arranged inside the dust suction mechanism, and multiple surfaces inside the dust suction mechanism are provided with dust suction ports for dusting multiple surfaces of the wiping mechanism.

[0016] The wiping mechanism is arranged inside the dust collection mechanism, which can prevent the wiped burrs from splashing around and escaping, keeping the working environment clean and the staff safe. Multiple dust collection ports can achieve multi-directional dust collection, which is more efficient in absorbing burrs than single-sided dust collection and avoids dust collection dead corners.

[0017] Furthermore, the dust collection mechanism comprises a dust collection shell, the dust collection shell surrounds the outside of the wiping mechanism, and a connecting port is provided on one side of the dust collection shell; the two wiping panels are distributed on both sides of the center line of the connecting port.

[0018] The dust collection shell prevents burrs from escaping and protects the wiping mechanism. The pole piece body enters the dust collection shell through the connecting port and then the burrs are removed by the wiping mechanism. The wiping panels on both sides allow the pole piece body to pass between the two.

[0019] Furthermore, the dust collection shell is connected to the wiping panel via a connecting piece, and the connecting piece pushes the two wiping panels to move closer to or away from each other.

[0020] The connector can adapt to pole piece bodies of different thicknesses by adjusting the spacing between the two sets of wiping panels, maintain a good wiping effect on pole piece bodies of different thicknesses, and improve deburring efficiency.

[0021] Furthermore, a protection mechanism is connected to a position of the outside of the dust collection shell corresponding to the communication port, a protection channel is arranged inside the protection mechanism, and the protection channel is connected with the inside of the dust collection shell through the communication port.

[0022] The protective mechanism can increase the contact area between the manual splicing process and the pole piece body, prevent the pole piece body from being damaged again during the manual pulling process, and play a protective role.

[0023] The present invention also provides a method for evaluating the deburring effect of a pole piece, which is used to evaluate the deburring effect of the pole piece deburring system, and comprises the following steps:

[0024] Establish a first online detection system and a second online detection system, wherein the first online detection system detects the cutting burrs of the pole piece body before deburring and judges NG and stores a picture, and the second online detection system detects the cutting burrs of the pole piece body after deburring and stores a picture;

[0025] When the equipment alarms, the NG images and the images after deburring are manually checked and the burr removal rates are compared and calculated to obtain the burr removal effect of the system.

[0026] Compared with the existing known technology, the technical solution provided by the present invention has the following beneficial effects:

[0027] A pole piece burr removal system of the present invention has a pole piece body extending in a strip shape that can just pass through a linear gap, and both sides of the linear gap are first wiping bodies, which can wipe the burrs on the pole piece body on the one hand, and clamp the pole piece body on the other hand, so that the pole piece body can be stably transported. The wavy gap makes the pole piece body have greater resistance when moving forward, prolonging the passing time of the pole piece body, that is, increasing the grinding time. The wave crest formed by the elastic second wiping body continuously collides and contacts with the cut edge of the pole piece body when the pole piece body moves forward, thereby enhancing the wiping effect and improving the efficiency of deburring.

[0028] The present invention provides a method for evaluating the effect of pole piece burr removal, using two sets of burr online detection systems arranged before and after the removal system, and evaluating the removal effect more accurately than manual sampling by comparing the number of detected burrs.

[0029] It will be apparent that elements or features described above in the context of a single embodiment may be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0031] Figure 1 1 is a schematic diagram of the end face structure of a pole piece burr removal system according to an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a row of second wiping bodies in the second wiping area in an embodiment of the present invention;

[0033] Figure 3 It is a flow chart of a method for evaluating the effect of removing burrs from a pole piece in an embodiment of the present invention.

[0034] Description of Reference Numerals

[0035] 100, wiping mechanism; 110, first wiping area; 111, first wiping body; 112, linear gap; 120, second wiping area; 121, second wiping body; 122, wavy gap; 130, wiping panel; 200, pole piece body; 300, dust suction mechanism; 310, dust suction shell; 320, connecting port; 330, dust suction pipe port; 400, connecting piece; 410, adjusting bolt; 420, adjusting nut; 500, protective mechanism; 510, protective channel; 520, protective panel; 530, protective hair column; 600, fixing mechanism. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0037] Reference Figure 1-Figure 2 This embodiment provides a pole piece burr removal system, including a wiping mechanism 100, a dust suction mechanism 300 and a protective mechanism 500. The wiping mechanism 100 is used to wipe the cutting burrs of the pole piece body 200. The dust suction mechanism 300 can absorb the wiped burrs and then centrally process them. The protective mechanism 500 can prevent the pole piece body 200 from being damaged during transportation. Among them, the wiping mechanism 100 is the main component for removing the cutting burrs of the pole piece body 200. The wiping mechanism 100 is provided with a first wiping area 110 and a second wiping area 120. The first wiping area 110 is provided with a first wiping body 111. The first wiping body 111 is located on both sides of the surface of the pole piece body 200 to form a linear gap 112 for the pole piece body 200 to pass through. The pole piece body 200 extending in a strip shape can just pass through the straight gap 112. Both sides of the straight gap 112 are first wiping bodies 111, which can wipe the burrs of the pole piece body 200 on the one hand, and clamp the pole piece body 200 on the other hand, so that the pole piece body 200 can be stably transported. The second wiping area 120 is provided with a second wiping body 121, and the second wiping body 121 is elastic. The second wiping body 121 is located on both sides of the surface of the pole piece body 200 to form a wavy gap 122 for the pole piece body 200 to pass through. The crests and troughs of the wavy gap 122 alternate continuously, and the crests wipe the cut edges of the pole piece body 200 when the pole piece body 200 moves forward. The wavy gap 122 makes the pole piece body 200 have greater resistance when moving forward, prolonging the passing time of the pole piece body 200, that is, increasing the grinding time. The wave crest formed by the elastic second wiping body 121 continuously collides and contacts with the cut edge of the pole piece body 200 when the pole piece body 200 moves forward, thereby enhancing the wiping effect and improving the efficiency of deburring. It can be understood that the spacing between the straight gap 112 and the wavy gap 122 is much smaller than the thickness of the pole piece body 200. In the actual wiping process, the first wiping body 111 and the second wiping body 121 are both wiped against the pole piece body 200.

[0038] It should be noted that if Figure 1 As shown, the wiping mechanism 100 shows an end face structure, and the forward direction of the pole piece body 200 is perpendicular to the end face structure of the wiping mechanism 100. The first wiping area 110 is located above the second wiping area 120, and the pole piece body 200 passes through the first wiping area 110 and the second wiping area 120 at the same time. The position of the pole piece body 120 with more cutting burrs is located in the second wiping area 120, and the wiping effect of the second wiping area 120 is better.

[0039] Specifically, Figure 1 and Figure 2 As shown, the wiping mechanism 100 includes two groups of wiping panels 130, and each group of wiping panels 130 is divided into a first wiping area 110 and a second wiping area 120; a plurality of first wiping bodies 111 are provided and arranged in the first wiping area 110 along the forward direction of the pole piece body 200, and the two groups of first wiping bodies 111 are of equal length and are used to clamp the two sides of the surface of the pole piece body 200. Therefore, the first wiping area 110 can form a linear gap 112 for the pole piece body 200 to pass through, and the pole piece body 200 can be wiped and clamped and positioned. A plurality of second wiping bodies 121 are provided and arranged in the second wiping area 120 along the forward direction of the pole piece body 200, and the lengths of the second wiping bodies 121 located on the same side of the surface of the pole piece body 200 are arranged alternately. The plurality of second wiping bodies 121 on both sides form a row, and the second wiping area 120 has a structure of multiple rows of second wiping bodies 121. The second wiping body 121 with a longer length forms a wave crest, and the second wiping body 121 with a shorter length forms a wave trough. The long and short second wiping bodies 121 on both sides of the pole piece body 200 alternate continuously to form a wavy gap 122, which wipes and removes the cutting burrs of the pole piece body 200. It should be noted that the first wiping body 111 and the second wiping body 121 in this embodiment both adopt a wiping hair column structure, and the hardness of the second wiping body 121 is greater than the hardness of the first wiping body 111. The second wiping body 121 with a higher hardness can increase its contact force with the cut surface of the pole piece body 200, and play a role in grinding and wiping the cut end surface of the pole piece body 200. In this embodiment, Figure 1 As shown, three rows of second wiping bodies 121 are provided, and more rows may be provided, in order to prevent the pole piece body 200 from being offset. When the pole piece body 200 is not offset or slightly offset, the first row of second wiping bodies 121 can produce sufficient contact with the cut edge of the pole piece body 200. Multiple, specifically 11 or more, second wiping bodies 121 on one side of each row are provided, which can increase the wiping time and improve the deburring effect.

[0040] It can be understood that in addition to the dispersedly arranged wiping hair column structure, the first wiping body 111 and the second wiping body 121 can also adopt an integral structure, and the second wiping body 121 is processed into a continuously undulating wavy structure on the side facing the pole piece body 200, thereby forming a wavy gap 122, thereby improving the wiping efficiency of the burrs on the pole piece body 200.

[0041] Furthermore, in order to improve the burr removal efficiency and reduce the accumulation of burrs in the wiping mechanism 100, a plurality of chip removal holes are provided on the wiping panel 130 for discharging the wiped burrs.

[0042] In order to prevent the burrs from being wiped off from flying around, Figure 1 As shown, the wiping mechanism 100 is arranged inside the dust suction mechanism 300, and multiple surfaces inside the dust suction mechanism 300 are provided with dust suction ports for vacuuming multiple surfaces of the wiping mechanism 100. Multi-surface vacuuming can improve the efficiency of burr suction, and can vacuum the burrs generated by the wiping mechanism 100 in multiple directions and without dead angles. Specifically, the dust suction mechanism 300 includes a dust suction shell 310, and the dust suction shell 310 is surrounded by the outside of the wiping mechanism 100. One side of the dust suction shell 310, specifically the upper side, is provided with a connecting port 320, and the pole piece body 200 enters the interior of the dust suction shell 310 through the connecting port 320. The two wiping panels 130 are distributed on both sides of the center line of the connecting port 320, so that the pole piece body 200 can pass between the two wiping panels 130. A dust suction pipe opening 330 is provided at one end of the dust suction shell 310 , and the dust suction pipe opening 330 is connected to an external negative pressure device. The negative pressure device generates negative pressure inside the dust suction shell 310 , and the burrs are concentrated to the dust suction pipe opening 330 through the dust suction ports provided on multiple surfaces and discharged.

[0043] It is understandable that in batteries of different specifications, the thickness of the pole piece body 200 is generally different. In order to ensure that the pole piece body 200 of different thicknesses can also have a good wiping and dust removal effect, in some embodiments, the dust collection housing 310 is connected to the wiping panel 130 through a connector 400, and the connector 400 pushes the two wiping panels 130 to move closer or farther from each other. Specifically, the connector 400 includes an adjusting bolt 410 and an adjusting nut 420. One end of the adjusting bolt 410 passes through the dust collection housing 310 and is fixedly connected to the wiping panel 130. The adjusting nut 420 is rotatably connected to the outer wall of the dust collection housing 310. The adjusting bolt 410 and the adjusting nut 420 are threadedly matched. When the adjusting nut 420 is rotated, the adjusting bolt 410 can be made to move linearly along its axial direction, thereby driving the wiping panel 130 to move linearly. Furthermore, by changing the direction of the adjusting nut 420, the movement direction of the wiping panel 130 can be changed, thereby adjusting the spacing between the two wiping panels 130.

[0044] In some embodiments, Figure 1As shown, a protective mechanism 500 is connected to the position of the connecting port 320 on the outside of the dust collection shell 310, and a protective channel 510 is arranged inside the protective mechanism 500. The protective channel 510 is connected to the inside of the dust collection shell 310 through the connecting port 320, and the pole piece body 200 passes through the protective channel 510 to enter the inside of the dust collection mechanism 300. Specifically, the protective mechanism 500 includes a protective panel 520 arranged on the outside, and a protective hair column 530 arranged on the inner side of the protective panel 520, that is, on the side facing the protective channel 510. The protective hair column 530 is elastic and made of a relatively soft material, which can avoid scratching the pole piece body 200, and increase the contact area between the pole piece body 200 and the pole piece body 200 during the manual splicing process, so as to prevent the pole piece body 200 from being damaged again during the manual pulling process, thereby playing a protective role. The protective panel 520 is rigid and can provide structural protection.

[0045] Furthermore, in some embodiments, a fixing mechanism 600 is also connected to the outside of the dust collection shell 310. The fixing mechanism 600 includes three connecting surfaces. Each connecting surface is provided with a fixing interface. The corresponding fixing interface can be selected for fixed connection according to actual work requirements.

[0046] Another aspect of the present application provides a method for evaluating the effect of removing burrs from a pole piece, such as Figure 3 As shown, the deburring effect of the above-mentioned pole piece burr removal system is evaluated, including the following steps:

[0047] Arrange two sets of burr online detection systems before and after the removal system, namely the first online detection system and the second online detection system. The distance between the two burr detection systems cannot be too close. First, stick tape on the edge of the pole piece body 200. The first online detection system is turned on first. After detecting the cutting burrs of the tape and the pole piece body 200 before deburring, it is judged as NG and then the picture is saved and a signal is sent to start the second online detection system. The second online detection system is turned on to detect the cutting burrs of the pole piece body 200 after deburring and save all pictures.

[0048] After a period of time, such as T time, the device alarms and is manually checked. The time of the tape detection by the two sets is approximately taken as the time difference between the two pictures before and after the same position. According to the time of the NG picture detected by the first set, the corresponding second set of detection and saved pictures are found, compared and counted, and the above actions are repeated to calculate the burr removal rate, obtain the removal effect of the pole piece removal system and eliminate useless photos. Two sets of burr online detection systems are arranged before and after the removal system. By comparing the number of detected burrs, the removal effect can be evaluated more accurately than manual sampling.

[0049] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The protection scope of the present invention is limited only by the claims. With the help of the teachings of the present invention, those skilled in the art will easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A pole piece burr removal system, comprising a wiping mechanism (100) for wiping a pole piece body (200), characterized in that: The wiping mechanism (100) is provided with a first wiping area (110) and a second wiping area (120); the first wiping area (110) is provided with a first wiping body (111), the first wiping body (111) is located on both sides of the surface of the pole piece body (200) to form a straight gap (112) for the pole piece body (200) to pass through; the second wiping area (120) is provided with a second wiping body (121), the second wiping body (121) is elastic, the second wiping body (121) is located on both sides of the surface of the pole piece body (200) to form a wavy gap (122) for the pole piece body (200) to pass through; the crests and troughs of the wavy gap (122) are continuously alternated, and the crests wipe the cut edges of the pole piece body (200) when the pole piece body (200) moves forward.

2. A pole piece burr removal system according to claim 1, characterized in that: The wiping mechanism (100) comprises two groups of wiping panels (130), each group of the wiping panels (130) being divided into the first wiping area (110) and the second wiping area (120); a plurality of the first wiping bodies (111) are arranged in the first wiping area (110) along the forward direction of the pole piece body (200); the two groups of the first wiping bodies (111) are of equal length and are used to clamp the two sides of the surface of the pole piece body (200).

3. A pole piece burr removal system according to claim 2, characterized in that: The second wiping bodies (121) are provided in plurality and are arranged in the second wiping area (120) along the forward direction of the pole piece body (200), and the second wiping bodies (121) located on the same side of the surface of the pole piece body (200) are arranged alternately in length.

4. A pole piece burr removal system according to claim 3, characterized in that: The hardness of the second wiping body (121) is greater than the hardness of the first wiping body (111).

5. A pole piece burr removal system according to claim 2 or 3, characterized in that: The wiping panel (130) is provided with a plurality of chip removal holes for removing the burrs wiped off.

6. A pole piece burr removal system according to claim 2, characterized in that: It also comprises a dust suction mechanism (300), the wiping mechanism (100) being arranged inside the dust suction mechanism (300), and dust suction ports are provided on multiple surfaces inside the dust suction mechanism (300) for dust suctioning multiple surfaces of the wiping mechanism (100).

7. A pole piece burr removal system according to claim 6, characterized in that: The dust collection mechanism (300) comprises a dust collection shell (310), the dust collection shell (310) is surrounded on the outside of the wiping mechanism (100), and a connecting port (320) is provided on one side of the dust collection shell (310); the two wiping panels (130) are distributed on both sides of the center line of the connecting port (320).

8. A pole piece burr removal system according to claim 7, characterized in that: The dust collection housing (310) is connected to the wiping panel (130) via a connecting piece (400), and the connecting piece (400) pushes the two wiping panels (130) to move closer to or farther from each other.

9. A pole piece burr removal system according to claim 7, characterized in that: A protection mechanism (500) is connected to the position of the outside of the dust collection shell (310) corresponding to the communication port (320), and a protection channel (510) is provided inside the protection mechanism (500). The protection channel (510) is connected to the inside of the dust collection shell (310) through the communication port (320).

10. A method for evaluating the deburring effect of a pole piece, used for evaluating the deburring effect of the pole piece deburring system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Establishing a first online detection system and a second online detection system, wherein the first online detection system detects the cutting edge burr condition of the pole piece body (200) before deburring and judges NG and stores a graph, and the second online detection system detects the cutting edge burr condition of the pole piece body (200) after deburring and stores a graph; When the equipment alarms, the NG images and the images after deburring are manually checked and the burr removal rates are compared and calculated to obtain the burr removal effect of the system.

Images