Rotary translation cable end polishing, cleaning, greasing and cutting device

Abstract

The application discloses a polishing, cleaning, greasing and cutting device for rotating and translating cable end, which comprises an operation table, a clamp, a polishing rubber belt, a greasing rubber belt, a belt seat, a driving mechanism, a gas injection mechanism, a cutting mechanism and a controller. The belt seat comprises a base disc, a belt frame and a position adjusting assembly. The base disc and the belt frame are respectively provided with disc cable holes and frame cable holes. The belt frame is indirectly connected to the base disc through the position adjusting assembly and realizes the adjustment of the eccentric direction and the eccentric degree between the disc cable holes and the frame cable holes. The polishing rubber belt and the greasing rubber belt are respectively installed on the side of the belt frame away from the base disc and form a belt gap opposite to the frame cable holes. The base disc is driven by the driving mechanism to rotate and move horizontally between the two clamps. The gas injection mechanism injects gas between the disc cable holes, the frame cable holes and the belt gap. The cutting mechanism can automatically ascend and descend and cut the cable installed between the two clamps. The whole operation is convenient.

Description

[Technical Field]

[0001] This invention relates to the technical field of cables, and in particular to the technical field of rotating and translating cable end grinding, cleaning, coating and cutting devices. [Background Technology]

[0002] Cables are wire products used to transmit electrical energy or signals. When in use, cables typically require terminals at both ends for connection between electrical appliances. Currently, before installing terminals, cable ends often require pretreatment (mainly including grinding, cleaning, and applying conductive paste) to improve conductivity between the cable and the terminals. Specifically, the pretreatment process involves manually removing the oxide layer from the connection area between the cable conductor and the terminal using a wire brush, then manually brushing away oxide debris before applying conductive paste, as illustrated in invention patents CN104967066A (a method for installing prefabricated intermediate joints of cross-linked cables) and CN104638385B (an aluminum alloy cable branch connection assembly for streetlights). However, all of these processes are done manually by workers, resulting in high labor intensity, low processing efficiency, and poor processing quality.

[0003] Currently, there are already devices on the market specifically designed for grinding, cleaning, and applying paste to cables. Examples include a cable grinding machine disclosed in utility model patent CN203787868U, a cable conductor surface cleaning device disclosed in invention patent CN105118572A, and a high-voltage cable asphalt coating machine disclosed in utility model patent CN201676796U. However, these devices are limited in function, requiring workers to sequentially feed the cables into them and disassemble and reassemble the cables before and after each step. This cumbersome operation does not significantly improve processing efficiency.

[0004] Furthermore, after grinding, cleaning, and applying paste to the cables, sometimes it is necessary to cut them. Whether workers manually cut the cables with scissors or use an electric cutting device such as the cable cutter disclosed in utility model patent CN206225914U, the aforementioned problems of high labor intensity or cumbersome operation persist. [Summary of the Invention]

[0005] The purpose of this invention is to solve the problems in the prior art and to propose a rotary translational cable end grinding, cleaning, coating and cutting device that can integrate cable grinding, cleaning, coating and cutting operations into one machine. The overall operation is convenient, which can greatly improve processing efficiency and product processing consistency, and can also effectively reduce the labor intensity of operators.

[0006] To achieve the above objectives, this invention proposes a rotary translational cable end grinding, cleaning, coating, and cutting device, including an operating table, clamps, grinding tape, coating tape, tape holder, drive mechanism, air jet mechanism, cutting mechanism, and controller. The top surface of the operating table is provided with a pair of opposing clamps. The tape holder includes a base plate, a tape frame, and an adjustment component. The base plate and tape frame are respectively provided with cable holes for the cable reel and cable frame. The tape frame is indirectly connected to the base plate through the adjustment component, allowing adjustment of the eccentricity direction and degree between the cable holes for the cable reel and cable frame. The abrasive belt and the adhesive tape are respectively installed on the side of the belt frame away from the base plate, forming a belt gap directly opposite the cable hole of the frame. The base plate is driven by a drive mechanism to rotate while moving horizontally between two sets of clamps. Gas is injected into the gap between the cable hole of the plate, the cable hole of the frame, and the belt by a jetting mechanism. An opening is provided on the operating table. The cutting mechanism is installed below the operating table, and the cutting head can automatically rise and fall and cut the cable installed between the two clamps after passing through the opening. The controller is electrically connected to the drive mechanism, the jetting mechanism, and the cutting mechanism respectively.

[0007] Preferably, the adjustment assembly includes sliding columns and an adjustment handle. Several sliding columns are horizontally fixed on the base plate and located on the upper and lower sides of the cable hole of the plate. The belt frame is slidably connected to each sliding column. The adjustment handle includes a positioning block and an adjustment bolt. The positioning block is fixed on the base plate. The end of the screw of the adjustment bolt is rotatably connected to the belt frame after being screwed through the screw hole of the positioning block.

[0008] Preferably, the belt seat further includes a mandrel, which includes a shaft body and a bushing. Several shaft bodies of the mandrel are respectively horizontally arranged and one end is fixed to the belt frame. Each shaft body is rotatably connected to a bushing. The grinding tape and the application tape are respectively sleeved on part of the bushing.

[0009] Preferably, the sections of the polishing tape and the coating tape facing the gap in the tape body are straight due to the support of the mandrel.

[0010] Preferably, the belt frame is provided with several vertically arranged through slots, and one end of each shaft passes through the through slot and is fixed by fasteners.

[0011] Preferably, the drive mechanism includes a motor, a rotating platform, a frame, a transmission toothed belt, a lead screw, a lead rod, and a guide rod. The lead screw and guide rod are horizontally arranged above the operating table. The lead screw is threaded onto the lead screw. The frame is slidably connected to both the lead screw and the guide rod. The rotating platform is rotatably connected to the frame and is driven to rotate by the motor. The rotating platform and the lead screw are respectively provided with platform teeth and lead screw teeth. The transmission toothed belt is sleeved on both the rotating platform and the lead screw and meshes with the platform teeth and lead screw teeth respectively. The lead screw is also provided with an annular groove that clamps the edge of the base plate.

[0012] Preferably, the jetting mechanism includes an air pump, an air pipe, a valve seat, and a valve core. The air pump is fixed on the operating table, the valve seat is slidably connected to the guide rod, one end of the air pipe is installed at the air outlet of the air pump, and the other end is installed at the air inlet of the valve seat. The valve core is rotatably connected to the valve seat, with one end fixed to the base plate and the other end rotatably connected to the frame. The valve core has a valve body cable hole facing the disc cable hole, and the wall of the valve body cable hole is surrounded by several air holes that penetrate the outer wall of the valve core.

[0013] Preferably, the cutting mechanism includes a support frame, a main electric push rod, and a cutting head. The operating table is mounted on top of the support frame. The cutting head is driven by the main electric push rod mounted on the support frame to automatically move up and down along the opening. The cutting head includes an upper cutter, a lower cutter, a base, and an auxiliary electric push rod. One end of the upper cutter is hinged to the base, and the other end is detachably connected to the base via fasteners. The lower cutter is slidably connected to the base and is driven by the auxiliary electric push rod to move closer to or away from the upper cutter.

[0014] Preferably, the upper blade of the upper cutter and the lower blade of the lower cutter are arranged opposite each other and are both arc-shaped. When the lower cutter moves upward toward the upper cutter, it can join with the upper cutter to form a spindle-shaped cut.

[0015] The beneficial effects of this invention are:

[0016] 1) By setting a pair of clamps on the top surface of the operating table to hold and fix the cable, the grinding tape and the coating tape are switched with the seat to apply the tape to the cable in sequence. At the same time, the driving mechanism drives the grinding tape and the coating tape to rotate around the cable and move horizontally. The air jet mechanism continuously sprays compressed gas. A cutting mechanism is also added that can automatically move up and down along the opening of the operating table and cut the cable installed between the two clamps. Thus, the grinding, cleaning, coating and cutting operations of the cable are integrated into one machine. The overall operation is convenient, which can greatly improve the processing efficiency and the processing consistency of the product, and can also effectively reduce the labor intensity of the operator.

[0017] 2) By using a sliding column and an adjusting handle to form an adjustment component, and adding a shaft and bushing to form a mandrel, the grinding tape and the coating tape can rotate synchronously during operation by utilizing the friction between them and the cable. This avoids the grinding tape and the coating tape always grinding or coating the cable at the same point, thus effectively extending the service life of the grinding tape and the coating tape.

[0018] 3) By using a motor, rotating platform, frame, transmission toothed belt, screw nut, screw rod and guide rod to form a drive mechanism, the overall structure is not only simple and compact, but also enables the grinding tape and coating tape to rotate around the cable while traveling in a straight line along the screw rod, ensuring the fullness and uniformity of grinding and coating operations.

[0019] 4) By using an air pump, air pipe, valve seat and valve core to form an air jet mechanism, it does not affect the specific activities of sanding and applying tape, and can also spray compressed gas synchronously near the sanding position to quickly blow away the sanding debris.

[0020] 5) The cutting mechanism is composed of a support frame, a main electric push rod, and a cutting head. The cutting head is composed of an upper cutter, a lower cutter, a base, and an auxiliary electric push rod. The upper and lower cutters can be raised and lowered in two stages by the main and auxiliary electric push rods, so as to realize the raising and lowering of the upper and lower cutters and cutting, avoiding conflicts with the operation of other components in a small space.

[0021] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. [Attached Image Description]

[0022] Figure 1 This is a three-dimensional structural diagram of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention during the grinding operation;

[0023] Figure 2 yes Figure 1 A three-dimensional structural diagram after removing the support frame, main electric push rod, and auxiliary electric push rod;

[0024] Figure 3 This is a three-dimensional structural diagram of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention during the cutting operation;

[0025] Figure 4 This is the book Figure 3 A three-dimensional structural diagram after removing the support frame, main electric push rod, and auxiliary electric push rod;

[0026] Figure 5 yes Figure 4 An enlarged view of point A;

[0027] Figure 6 This is a schematic diagram of the working process of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention during the grinding operation;

[0028] Figure 7 This is a schematic diagram of the working process of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention during the coating operation;

[0029] Figure 8 This is a schematic diagram of the working operation of the rotating and translating cable end grinding, cleaning, paste application and cutting device of the present invention during the cleaning operation.

[0030] Figure 9 This is a front view of the cutting mechanism of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention when the upper cutter is open;

[0031] Figure 10 This is a front view of the cutting mechanism of the rotating and translating cable end grinding, cleaning, coating and cutting device of the present invention when the upper cutter is closed.

[0032] In the diagram: 1-Operating table, 2-Clamping fixture, 3-Grinding tape, 4-Applying tape, 5-Seat, 51-Base plate, 52-Sliding column, 53-Frame, 54-Mandrel, 55-Adjusting handle, 551-Positioning block, 552-Adjusting bolt, 6-Drive mechanism, 61-Motor, 62-Rotating platform, 621-Platform teeth, 63-Frame, 64-Transmission belt, 65-Nut, 651-Nutrition teeth, 652-Annular groove, 66-Lead screw, 67-Guide rod, 7-Air jet mechanism, 71-Air pump, 72-Air pipe, 73-Valve seat, 74-Valve core, 8-Cable, 9-Cutting mechanism, 91-Support frame, 92-Main electric push rod, 93-Cutting head, 931-Upper cutter, 932-Lower cutter, 933-Base, 934-Auxiliary electric push rod.

Detailed Implementation Methods

[0033] See Figures 1 to 10This invention relates to a rotary translational cable end grinding, cleaning, coating, and cutting device, comprising an operating table 1, clamps 2, grinding tape 3, coating tape 4, tape holder 5, a drive mechanism 6, an air jet mechanism 7, a cutting mechanism 9, and a controller. The top surface of the operating table 1 is provided with a pair of opposing clamps 2. The tape holder 5 includes a base plate 51, a tape frame 53, and an adjustment component. The base plate 51 and tape frame 53 are respectively provided with a disc cable hole and a frame cable hole. The tape frame 53 is indirectly connected to the base plate 51 through the adjustment component, enabling adjustment of the eccentricity direction and degree between the disc cable hole and the frame cable hole. The grinding tape 3... The adhesive tape 4 is installed on the side of the tape holder 53 away from the base plate 51, forming a gap in the tape body opposite the cable hole of the holder. The base plate 51 is driven by the drive mechanism 6 to rotate while moving horizontally between the two sets of clamps 2. Gas is sprayed into the gap between the cable hole of the tape body, the cable hole of the holder, and the tape body by the jetting mechanism 7. An opening is provided on the operating table 1. The cutting mechanism 9 is installed below the operating table 1, and the cutting head 93 can automatically move up and down and cut the cable 8 installed between the two clamps 2 after passing through the opening. The controller is electrically connected to the drive mechanism 6, the jetting mechanism 7, and the cutting mechanism 9. The conductive paste on the surface of the adhesive tape 4 can be manually replenished by the worker periodically, or it can be electrically replenished with a funnel or other dispensing device with a solenoid valve.

[0034] The adjustment assembly includes sliding columns 52 and adjustment handles 55. Several sliding columns 52 are horizontally fixed on the base plate 51 and located on the upper and lower sides of the cable hole of the plate. The belt frame 53 is slidably connected to each sliding column 52. The adjustment handle 55 includes a positioning block 551 and an adjustment bolt 552. The positioning block 551 is fixed on the base plate 51. The end of the screw of the adjustment bolt 552 is rotatably connected to the belt frame 53 after being screwed through the block screw hole of the positioning block 551.

[0035] The belt holder 5 also includes a spindle 54, which includes a shaft body and a bushing. Several shaft bodies of the spindle 54 are horizontally arranged and one end is fixed to the belt frame 53. Each shaft body is rotatably connected to a bushing. The polishing tape 3 and the coating tape 4 are respectively sleeved on part of the bushing.

[0036] The sections of the polishing tape 3 and the coating tape 4 facing the gap in the tape body are straight due to the support of the spindle 54.

[0037] The belt frame 53 has several vertically arranged through slots, and one end of each shaft passes through the through slot and is fixed by fasteners. The addition of through slots allows the position of each shaft to be adjusted up and down as needed, thereby ensuring that the grinding tape 3 and the application tape 4 remain taut during operation.

[0038] The drive mechanism 6 includes a motor 61, a rotating platform 62, a frame 63, a transmission toothed belt 64, a lead screw 65, a lead screw 66, and a guide rod 67. The lead screw 66 and guide rod 67 are horizontally arranged above the operating table 1. The lead screw 65 is threaded onto the lead screw 66. The frame 63 is slidably connected to both the lead screw 66 and guide rod 67. The rotating platform 62 is rotatably connected to the frame 63 and is driven to rotate by the motor 61. The rotating platform 62 and the lead screw 65 are respectively provided with platform teeth 621 and female teeth 651. The transmission toothed belt 64 is sleeved on both the rotating platform 62 and the lead screw 65 and meshes with the platform teeth 621 and female teeth 651 respectively. The lead screw 65 is also provided with an annular clamping groove 652 to clamp the edge of the base plate 51. In addition, a limit switch can be provided on the top surface of the operating table 1 to limit the range of movement of the base plate 51 along the lead screw 66.

[0039] The jetting mechanism 7 includes an air pump 71, an air pipe 72, a valve seat 73, and a valve core 74. The air pump 71 is fixed on the operating table 1. The valve seat 73 is slidably connected to the guide rod 67. One end of the air pipe 72 is installed at the air outlet of the air pump 71, and the other end is installed at the air inlet of the valve seat 73. The valve core 74 is rotatably connected to the valve seat 73, with one end fixed to the base plate 51 and the other end rotatably connected to the frame 63. The valve core 74 is provided with a valve body cable hole facing the disc cable hole. The wall of the valve body cable hole is surrounded by several air holes that penetrate the outer wall of the valve core 74.

[0040] The cutting mechanism 9 includes a support frame 91, a main electric push rod 92, and a cutting head 93. The operating table 1 is mounted on the top of the support frame 91. The cutting head 93 is driven by the main electric push rod 92 mounted on the support frame 91 to automatically move up and down along the opening. The cutting head 93 includes an upper cutter 931, a lower cutter 932, a base 933, and an auxiliary electric push rod 934. One end of the upper cutter 931 is hinged to the base 933, and the other end is detachably connected to the base 933 by fasteners. The lower cutter 932 is slidably connected to the base 933 and is driven by the auxiliary electric push rod 934 to move closer to or away from the upper cutter 931.

[0041] The upper blade of the upper cutter 931 and the lower blade of the lower cutter 932 are arranged opposite each other and are both arc-shaped. When the lower cutter 932 moves upward toward the upper cutter 931, it can join with the upper cutter 931 to form a spindle-shaped cut.

[0042] Working process of this invention:

[0043] Before operation, cable 8 is passed through the gap in the belt body, the cable hole in the frame, the cable hole in the disc body, and the cable hole in the valve body. Then, it is clamped and fixed using two sets of clamps 2. The cutting head 93 is then lowered to its lowest position using the main electric push rod 92 (both the upper cutter 931 and the lower cutter 932 are located below the operating table 1). Specifically, the clamping and fixing operation of clamp 2 involves first passing cable 8 between the arc surface of the base body and the arc surface of the cover body, and then using fasteners to fix the clamp 21 and the clamp cover 22 together to clamp cable 8.

[0044] Before the polishing operation, first tighten the adjusting bolt 552 to move the belt bracket 53 along each sliding column 52 until the cable is in close contact with the polishing tape 3. Next, start the motor 61 to drive the rotating platform 62 to rotate forward or backward repeatedly, while the transmission toothed belt 64 drives the screw nut 65 to rotate forward or backward repeatedly and move back and forth along the screw 66. At this time, the base plate 51 and the polishing tape 3 and the coating tape 4 connected to it can rotate forward or backward and move back and forth along the screw 66 under the drive of the screw nut 65, thereby polishing the cable 8 through the polishing tape 3. In addition, during this polishing process, the air pump 71 can be started to allow compressed gas to enter the valve core 74 through the air pipe 72 and the valve seat 73 to quickly clean up the debris from the polishing. Specifically, the compressed gas sprayed from the air outlet of the valve seat 73 can enter the cable hole of the valve body through each air hole, and then blow out the debris from the polishing along the cable 8.

[0045] Before applying the conductive paste, first tighten the adjusting bolt 552 to move the tape holder 53 along each slide post 52 until the cable is in close contact with the application tape 4. Then, manually apply conductive paste to the surface of the application tape 4. Next, start the motor 61 so that the application tape 4 rotates around the cable 8 and moves horizontally, gradually transferring the conductive paste to the surface of the cable 8.

[0046] Before performing the cutting operation, the main electric push rod 92 is used to raise the cutting head 93 to its highest position (both the upper cutter 931 and the lower cutter 932 are located above the operating table 1). Next, the upper cutter 931 is flipped over and its free end is fixed to the base 933 using fasteners, thereby placing the cable 8 within the spindle-shaped cut formed by the upper and lower cutter blades (see...). Figure 10 Subsequently, the auxiliary electric push rod 934 drives the lower cutter 932 to rise until the cable 8 is cut.

[0047] After completing the grinding, cleaning, applying paste and cutting operations, simply loosen the two sets of clamps 2 and then remove the cable 8.

[0048] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A rotary translational device for grinding, cleaning, applying paste, and cutting cable ends, characterized in that: The system includes an operating table (1), clamps (2), grinding tape (3), applying tape (4), a belt seat (5), a drive mechanism (6), an air jet mechanism (7), a cutting mechanism (9), and a controller. The top surface of the operating table (1) is provided with a pair of clamps (2) arranged opposite to each other. The belt seat (5) includes a base plate (51), a belt frame (53), and an adjustment component. The base plate (51) and the belt frame (53) are respectively provided with disc cable holes and frame cable holes. The belt frame (53) is indirectly connected to the base plate (51) through the adjustment component and realizes the adjustment of the eccentricity direction and degree between the disc cable holes and the frame cable holes. The grinding tape (3) and the applying tape (4) are respectively installed On the side of the belt frame (53) away from the base plate (51), a belt gap is formed facing the cable hole of the frame. The base plate (51) is driven by the drive mechanism (6) to rotate while moving horizontally between the two sets of clamps (2). Gas is injected between the cable hole of the plate, the cable hole of the frame and the belt gap by the jetting mechanism (7). An opening is provided on the operating table (1). The cutting mechanism (9) is installed below the operating table (1) and the cutting head (93) can automatically rise and fall and cut the cable (8) installed between the two clamps (2) after passing through the opening. The controller is electrically connected to the drive mechanism (6), the jetting mechanism (7) and the cutting mechanism (9) respectively. The adjustment assembly includes a sliding column (52) and an adjustment handle (55). Several sliding columns (52) are horizontally fixed on the base plate (51) and located on the upper and lower sides of the cable hole of the plate. The belt frame (53) is slidably connected to each sliding column (52). The adjustment handle (55) includes a positioning block (551) and an adjustment bolt (552). The positioning block (551) is fixed on the base plate (51). The end of the screw of the adjustment bolt (552) is rotatably connected to the belt frame (53) after being screwed through the screw hole of the positioning block (551). The drive mechanism (6) includes a motor (61), a rotating platform (62), a frame (63), a transmission toothed belt (64), a lead screw nut (65), a lead screw (66), and a guide rod (67). The lead screw (66) and the guide rod (67) are respectively horizontally arranged above the operating table (1). The lead screw nut (65) is threaded to the lead screw (66). The frame (63) is slidably connected to both the lead screw (66) and the guide rod (67). The rotating platform (62) is rotatable. The rotating platform (62) is connected to the frame (63) and driven to rotate by the motor (61). The rotating platform (62) and the nut (65) are respectively provided with platform teeth (621) and nut teeth (651). The transmission belt (64) is simultaneously sleeved on the rotating platform (62) and the nut (65) and meshes with the platform teeth (621) and the nut teeth (651) respectively. The nut (65) is also provided with an annular clamping groove (652) and clamps the edge of the base plate (51). The jet mechanism (7) includes an air pump (71), an air pipe (72), a valve seat (73), and a valve core (74). The air pump (71) is fixed on the operating table (1). The valve seat (73) is slidably connected to the guide rod (67). One end of the air pipe (72) is installed at the air outlet of the air pump (71), and the other end is installed at the air inlet of the valve seat (73). The valve core (74) is rotatably connected to the valve seat (73), with one end fixed to the base plate (51) and the other end rotatably connected to the frame (63). The valve core (74) is provided with a valve body cable hole facing the disc cable hole. The wall of the valve body cable hole is surrounded by several air holes that penetrate the outer wall of the valve core (74). The cutting mechanism (9) includes a support frame (91), a main electric push rod (92), and a cutting head (93). The operating table (1) is installed on the top of the support frame (91). The cutting head (93) is driven by the main electric push rod (92) installed on the support frame (91) to automatically move up and down along the opening. The cutting head (93) includes an upper cutter (931), a lower cutter (932), a base (933), and an auxiliary electric push rod (934). One end of the upper cutter (931) is hinged to the base (933), and the other end is detachably connected to the base (933) by fasteners. The lower cutter (932) is slidably connected to the base (933) and is driven by the auxiliary electric push rod (934) to move closer to or away from the upper cutter (931).

2. The grinding, cleaning, coating, and cutting device for the end of a rotating and translating cable as described in claim 1, characterized in that: The belt seat (5) also includes a spindle (54), which includes a shaft body and a bushing. The shaft bodies of several spindles (54) are respectively horizontally arranged and one end is fixed to the belt frame (53). Each shaft body is rotatably connected to a bushing. The polishing tape (3) and the coating tape (4) are respectively sleeved on the outside of some bushings.

3. The grinding, cleaning, coating, and cutting device for the end of a rotating and translating cable as described in claim 2, characterized in that: The sections of the polishing tape (3) and the coating tape (4) facing the gap in the tape body are straight due to the support of the mandrel (54).

4. The grinding, cleaning, coating, and cutting device for the end of a rotating and translating cable as described in claim 2, characterized in that: The belt frame (53) has several vertically arranged through slots, and one end of each shaft passes through the through slot and is fixed by fasteners.

5. The grinding, cleaning, coating, and cutting device for the end of a rotating and translating cable as described in claim 1, characterized in that: The upper blade of the upper cutter (931) and the lower blade of the lower cutter (932) are arranged opposite each other and are both arc-shaped. When the lower cutter (932) moves upward toward the upper cutter (931), it can join with the upper cutter (931) to form a spindle-shaped cut.

Images