Blank cutting device for ball screw machining

Abstract

The invention discloses a ball screw machining blank cutting device which comprises a breaking and cutting frame, and a discharging and pressing mechanism is movably connected to the breaking and cutting frame through a bearing. By optimizing the feeding step and the cutting process when a lead screw shaft on a ball screw is cut, a traditional feeding mechanism is replaced with rotation of a rolling barrel, and the cutting efficiency is improved; meanwhile, the material rolling barrel rotates along with the movement of a jacking column, a rotating arm connected with the end of the jacking column is pushed to rotate, a jacking block in a pressing groove in the material rolling barrel is pushed out, a lead screw shaft is stable when cutting is completed, and damage to a cutter due to vibration generated during cutting is avoided; the lifting heights of the ejector blocks are different, along with revolution of the lead screw shaft driven by the winding drum and autorotation of the lead screw shaft in contact with the housing, compared with direct cutting, the cutting period is shortened, and the cutting efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the cutting of the lead screw shaft on a ball screw, and particularly to a cutting device for a ball screw processing blank. Background Technique

[0002] A ball screw is an ideal product that converts rotary motion into linear motion or linear motion into rotary motion. It usually consists of a lead screw shaft, a nut, and balls. Among them, the lead screw shaft is the main component of the ball screw, usually a slender cylindrical shape, with high-precision threads on the surface. The shape and precision of the threads have a great influence on the transmission performance of the ball screw. The nut is internally designed with raceways that match the threads of the lead screw shaft, and the balls roll in these raceways;

[0003] When the lead screw shaft rotates, the balls roll between the thread raceway of the lead screw shaft and the raceway of the nut. Due to the presence of the balls, the sliding friction between the lead screw shaft and the nut is converted into rolling friction. In this process, the nut will perform linear motion along the axial direction of the lead screw shaft.

[0004] For the acquisition and processing of the lead screw shaft, high-quality alloy steels such as CrMo steel or GCr15 are usually selected. These materials have high strength, toughness, and wear resistance. First, turning processing is carried out to process the raw material into a rough lead screw shaft shape, which involves the fixed-length cutting of the lead screw shaft. Usually, the lead screw shaft raw material is placed on the workbench of a sawing machine, and fixtures such as V-blocks or parallel clamps are used to firmly fix the raw material. The speed and feed rate of the saw blade are adjusted according to the material and size of the raw material. During the cutting process, it is necessary to pay attention to observing the running condition of the saw blade and the cutting state of the raw material. If it is found that the saw blade vibrates too much or the raw material has obvious deviation, stop the machine immediately for inspection;

[0005] For example, in the patent with the publication number CN117532074A, it is emphasized that the cutting displacement of the lead screw shaft raw material and the fixing facility are separately set and cannot be used in cooperation. However, in the process of close cooperation, the improvement of cutting efficiency is ignored, resulting in the ball screw processing blank cutting device staying in the low-efficiency material transfer and cutting process. For this reason, we propose a ball screw processing blank cutting device. Summary of the Invention

[0006] The purpose of the present invention is to provide a cutting device for a ball screw processing blank to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A cutting device for a ball screw processing blank, including a cutting frame, and a feeding and pressing mechanism is movably connected to the cutting frame through a bearing;

[0008] The feeding and pressing mechanism includes a coil cylinder, a cutting groove, and a pressing groove. The two sides of the cutting frame are movably connected with the coil cylinder through bearings. A cutting groove is opened at the center position of the coil cylinder, and pressing grooves are symmetrically opened on both sides of the cutting groove on the outer wall of the coil cylinder;

[0009] A storage shell is fixed on the cutting frame at the top of the coil cylinder through bolts. A transmission component II is fixed on the cutting frame through bolts, and a rotating shaft is fixedly connected to the transmission component II. A saw blade is sleeved and fixed on the rotating shaft. A cover shell is fixedly connected on the cutting frame outside the coil cylinder.

[0010] Furthermore, the feeding and pressing mechanism further includes a top block and a top column. The top blocks are symmetrically and slidably connected in the pressing grooves on the coil cylinder. The top column is slidably connected in the coil cylinder, and one end of the top column penetrates through one side of the coil cylinder and is fixedly connected with a butting head.

[0011] Furthermore, two blocking frames are symmetrically and slidably connected to the top of the storage shell. A transmission component I is fixed on the cutting frame through bolts. A threaded rod is fixed at the end of the transmission component I, and one end of the threaded rod penetrates through the blocking frame and is threadedly connected with the blocking frame. The threads on both sides of the threaded rod are opposite.

[0012] Furthermore, the inner wall of the coil cylinder is evenly and symmetrically movably connected with swing arms. Lifting blocks are fixedly connected to the bottom of the top blocks in the pressing grooves. The groove on one side of the swing arm is clamped with the protrusion on the lifting block.

[0013] Furthermore, sleeves are evenly sleeved and fixed on the inner wall of the coil cylinder where the top column is located. The outer wall of the sleeve abuts against the other side of the swing arm. A spring is installed on the inner wall of the coil cylinder at the end of the top column.

[0014] Furthermore, a pressing plate is movably connected to the cutting frame. An electric push rod is fixed to one side of the cutting frame through bolts. One end of the electric push rod abuts against the pressing plate, and the other side of the pressing plate abuts against the top column.

[0015] A ratchet is sleeved and fixed on the cutting frame where the coil cylinder is located. A ratchet pawl is movably connected to the outer wall of the cutting frame, and one side of the ratchet pawl abuts against the ratchet. A blanking shell is slidably connected to the bottom of the cutting frame where the coil cylinder is located. A transmission component III is installed on the cutting frame, and the end of the transmission component III is fixedly connected with a pulley, and the pulley on the outer wall of the coil cylinder is sleeved with a belt.

[0016] The cutting method for the blank of the ball screw is as follows:

[0017] Fixed-length storage of the lead screw shaft: Put a batch of alloy steel columns to be cut into the storage shell. Start the transmission component I. The rotation of the threaded rod controls the movement of the two blocking frames on both sides of the top of the storage shell to complete the centering storage of the lead screw shaft in the storage shell;

[0018] Rotary cutting: The inner motor of the third transmission component drives the winding cylinder to rotate, causing the single lead screw shaft at the bottom of the storage shell to fall into the cutting slot and perform a revolution activity along with the rotation of the winding cylinder. The second transmission component drives the saw blade on the rotating shaft to rotate. At this time, the electric push rod pushes the entire pressing plate to rotate, causing the top column to move towards the inner wall of the winding shell, pushing the entire rotating arm to rotate, thereby pushing the top block in the pressing groove outward to press both sides of the lead screw shaft to be cut. Along with the rotation of the entire winding cylinder, the lead screw shaft abutted against the inner side of the housing rotates due to being unable to be discharged from the cutting slot, and cooperates with the high-speed rotating saw blade to complete the cutting of the lead screw shaft.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, to simplify the feeding operation during the cutting of the blank for processing ball screws, the cutting slot opened on the winding cylinder is used as the storage space. The lead screw shafts are collected one by one according to the cylindrical structure of the lead screw shaft during centralized placement, and the cutting and blanking of the lead screw shaft are completed during the rotation of the winding cylinder. The operation steps are simple and clear, without the need to set up feeding equipment for auxiliary cutting. At the same time, it is convenient to perform fixed-length cutting on lead screw shafts of different sizes and lengths. A retaining frame is installed on the storage shell to restrict the storage position of the entire lead screw shaft, facilitating the acquisition of lead screw shafts of different sizes, and the operation is flexible.

[0021] 2. In the present invention, to prevent ineffective fixation during the cutting of the lead screw shaft, resulting in damage when the cutting saw blade contacts the vibrating lead screw shaft, a rotating arm and a lifting block are installed inside the entire winding cylinder. Top blocks are arranged in the pressing grooves on both sides of the cutting slot. During the cutting process, the movement of the top blocks is controlled to complete the pressing of the lead screw shaft during cutting, thereby improving the stability during the cutting of the entire lead screw shaft. At the same time, due to the different shaft diameters of the lead screw shafts, the rotation amplitude of the pressing plate pushed by the electric push rod on the cutting frame is different, and the rising height of the top block is different. Along with the revolution of the lead screw shaft driven by the winding cylinder and the self-rotation of the lead screw shaft when it contacts the housing, compared with direct cutting, the cutting cycle is shortened, and the cutting efficiency is further improved. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of the cutting device for the blank of the ball screw processing of the present invention;

[0023] Figure 2 It is a schematic diagram of the installation of the feeding and pressing mechanism on the cutting device for the blank of the ball screw processing of the present invention;

[0024] Figure 3 It is a schematic diagram of the installation structure of the saw blade on the rotating shaft of the present invention;

[0025] Figure 4 It is a schematic diagram of the unilateral contact structure of the electric push rod and the pressing plate on the cutting frame of the present invention;

[0026] Figure 5 This is a schematic diagram of the overall structure of the feeding and pressing mechanism of the present invention;

[0027] Figure 6 This is a schematic sectional view of the feeding and pressing mechanism of the present invention;

[0028] Figure 7 This is a schematic diagram of the installation structure of the backside housing of the feeding and pressing mechanism of the present invention.

[0029] In the figure: 1. Cutting frame; 2. Feeding and pressing mechanism; 201. Coiling cylinder; 202. Cutting groove; 203. Pressing groove; 204. Top block; 205. Top post; 3. Ratchet; 4. Pawl; 5. Stock housing; 6. Baffle; 7. First transmission component; 8. Threaded rod; 9. Pressure plate; 10. Electric push rod; 11. Second transmission component; 12. Rotating shaft; 13. Saw blade; 14. Third transmission component; 15. Blanking housing; 16. Collar; 17. Rotating arm; 18. Lifting block; 19. Spring; 20. Housing. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0032] Embodiment 1: As shown in Figure 1 and Figure 2 , the blank cutting device for ball screw processing includes a feeding and pressing mechanism 2 for the screw shaft carrier, a stock housing 5 for centralized placement of screw shafts, and a saw blade 13 for cutting the screw shafts. To adapt to the positioning cutting of the saw blade 13 and prevent the screw shaft from vibrating during cutting, which may cause the saw blade 13 to break and damage, and at the same time reduce the overall cutting accuracy of the screw shaft, a top block 204 is provided on the rotating feeding and pressing mechanism 2 for fixing the screw shaft during cutting;

[0033] During specific operation, by virtue of the special cylindrical long bar structure of the screw shaft raw material, and the screw shaft is usually made of metal materials such as carbon steel and alloy steel, the cutting steps mainly include clamping the raw material, adjusting the sawing and raw material parameters, and subsequent cutting, which is convenient for loading operations of screw shafts with different batch lengths;

[0034] A storage shell 5 is fixedly connected to a cutting frame 1 located at the top of a coil cylinder 201, and a retaining frame 6 is symmetrically and slidably connected inside the storage shell 5. The movable control between the retaining frames 6 is used to control the storage space inside the entire storage shell 5 for placing lead screw shafts of different lengths.

[0035] During specific adjustment, a first transmission component 7 is fixedly connected to one side of the cutting frame 1. At the same time, slide rods and threaded rods 8 are arranged on both sides of the storage shell 5. The motor end of the first transmission component 7 is connected to the threaded rod 8, and the two retaining frames 6 are sleeved and installed on the threaded rod 8 and the slide rods. The first transmission component 7 drives the threaded rod 8 to rotate. At the same time, the threads of the threaded rod 8 on the two retaining frames 6 are opposite, and when rotating, it controls the two retaining frames 6 to move in opposite directions.

[0036] During specific feeding, a single lead screw shaft is placed into the storage shell 5. During the movement, the retaining frame 6 starts to contact both ends of the lead screw shaft. After clamping is completed, a batch of lead screw shafts are centrally placed. As Figure 3 shown, transverse channels are symmetrically opened on the outer wall of the coil cylinder 201, and vertical pressing grooves 203 are symmetrically arranged in the middle of the transverse channels. The middle parts of the two pressing grooves 203 are cutting grooves 202. The design of the transverse channels is used for the single acquisition of batch storage of lead screw shafts. Utilizing the inclined storage shell wall and the self-gravity of the lead screw shaft, as the coil cylinder 201 rotates, a single lead screw shaft will fall into the transverse channel on the coil cylinder 201 and rotate and move along with the coil cylinder 201.

[0037] A second transmission component 11 is fixedly connected to the cutting frame 1. The end of the second transmission component 11 is fixedly connected to an upper rotating shaft 12. A saw blade 13 is fixedly sleeved on the rotating shaft 12. At the same time, an upper cover 20 is fixedly installed between the saw blade 13 and the coil cylinder 201. A corresponding channel is opened on the upper cover 20 for the saw blade 13 to contact the lead screw shaft in the cutting groove 202. The saw blade 13 on the rotating shaft 12 rotates fixedly, and the lead screw shaft on the coil cylinder 201 rotates and contacts the saw blade 13. The cut lead screw shaft still remains inside the coil cylinder 201, and finally, the cut lead screw shaft in the channel is automatically discharged through the rotation of the coil cylinder 201.

[0038] Compared with using a sawing machine for cutting, during blanking, the lead screw shaft collides vertically, which is prone to damage. A blanking shell 15 is slidably connected to the entire cutting frame 1, and the blanking shell 15 is provided with a buffer fabric to protect the falling cut lead screw shaft.

[0039] For the drive of the entire coil cylinder 201, a third transmission component 14 is fixedly connected to the cutting frame 1. A pulley is sleeved and fixed on one side of the coil cylinder 201. A belt is sleeved and fixed between the pulley on the third transmission component 14 and the pulley sleeved on the coil cylinder 201. The entire coil cylinder 201 is driven to rotate through the third transmission component 14, and at the same time, it prevents the entire coil cylinder 201 from rotating in the reverse direction, causing the lead screw shaft to fall off the cutting frame 1. A ratchet 3 is sleeved and fixed on the cutting frame 1 and on one side of the coil cylinder 201. The pawl 4 installed on the cutting frame 1 is in side contact with the ratchet 3 to prevent the non-rotating coil cylinder 201 from moving in the reverse direction.

[0040] Embodiment 2: During cutting, it is necessary to press and stabilize the lead screw shaft. For this reason, a top column 205 is installed on the side of the entire coil cylinder 201. As Figure 4 、 Figure 5 and Figure 6 shown, one end of the entire top column 205 extends into the coil cylinder 201. At the same time, a collar 16 is sleeved and fixed on the top column 205 inside the coil cylinder 201. The same groove is provided on the entire collar 16. A rotating arm 17 is rotatably connected to the inner wall of the coil cylinder 201. The end of the rotating arm 17 is engaged with the groove on the collar 16, and its end does not abut against the bottom of the groove, which is convenient for the subsequent movement of the top column 205. The collar 16 drives the entire rotating arm 17 to rotate;

[0041] On the coil cylinder 201 arranged in the pressing groove 203, a top block 204 is symmetrically and slidably connected. The top block 204 is concave and fixed on the entire lifting block 18. A protrusion is fixed on the outer wall of the lifting block 18 and is engaged with the side groove of the rotating arm 17;

[0042] When the top column 205 drives the collar 16 to move to the right, the rotating arm 17 installed on the inner wall of the coil cylinder 201 starts to rotate. During the rotation process, it pushes the entire lifting block 18 and the top block 204 to slide outward, so that the top block 204 starts to contact the outer wall of the lead screw shaft stored in the pressing groove 203, and the outer walls on both sides are lifted upward. A housing 20 is also provided on the side of the coil cylinder 201. The lead screw shaft will contact the housing 20 during the pushing process, realizing the stability of the entire lead screw shaft during cutting;

[0043] Since the lead screw shaft is clamped between the top block 204 and the housing 20, with the rotation of the coil cylinder 201, the lead screw shaft is pushed to move, resulting in the rotation of the lead screw shaft during the revolution process and starting to contact the saw blade 13. While being tightened, the rotary cutting is completed. Compared with direct vertical cutting, the cutting cycle is shortened and the cutting efficiency is further improved;

[0044] For the driving of the entire top column 205, an electric push rod 10 is fixedly connected to the cutting frame 1. The pressing plate 9 that moves on the cutting frame 1 is located on one side of the electric push rod 10, and the other side abuts against the top column 205. The electric push rod 10 pushes the entire pressing plate 9 to rotate, and the top column 205 on the other side of the pressing plate 9 will slide towards the inner coiling cylinder 201, thus realizing the movement of the top block 204 in the pressing groove 203. When the pressing force applied by the pressing plate 9 ends, the spring 19 installed in the coiling cylinder 201 pushes the top column 205 in the reverse direction for resetting;

[0045] By using the movement of the top block 204 in the pressing groove 203, batch vibration of the lead screw shafts in the storage shell can be carried out, avoiding the situation that the stacked lead screw shafts cannot enter the surface grooves of the coiling cylinder 201 and resulting in idling. At the same time, the movement distance of the entire top block 204 can be adjusted according to the pushing distance of the electric push rod 10 to adapt to lead screw shafts of different diameters for stable cutting. There is still a large amount of room for expansion in the entire ball screw processing blank cutting device. It is convenient to carry out multi-segment cutting of the lead screw shaft in the future. Multiple saw blades 13 can be installed behind the entire housing 20. At the same time, corresponding cutting slots 202 and pressing grooves 203 are opened on the entire coiling cylinder 201, which is conducive to subsequent multi-segment centralized cutting of the lead screw shaft and further improves the cutting efficiency of the entire lead screw shaft.

[0046] The working process and principle of the present invention:

[0047] Put a batch of alloy steel columns to be cut into the storage shell 5, start the first transmission component 7, and the rotation of the threaded rod 8 controls the movement of the two side retaining frames 6 at the top of the storage shell 5 to complete the centering storage of the lead screw shafts in the storage shell 5;

[0048] The motor in the third transmission component 14 drives the coiling cylinder 201 to rotate, causing a single lead screw shaft at the bottom of the storage shell 5 to fall into the cutting slot 202 and perform a revolution along with the rotation of the coiling cylinder 201. The second transmission component 11 drives the saw blade 13 on the rotating shaft 12 to rotate. At this time, the electric push rod 10 pushes the entire pressing plate 9 to rotate, causing the top column 205 to move towards the inner wall of the coiling shell, pushing the entire rotating arm 17 to rotate, thereby pushing the top block 204 in the pressing groove 203 outwards to press both sides of the lead screw shaft to be cut. Along with the rotation of the entire coiling cylinder 201, the lead screw shaft abutted against the inner side of the housing 20 rotates due to being unable to be discharged from the cutting slot 202, and cooperates with the high-speed rotating saw blade 13 to complete the cutting of the lead screw shaft.

[0049] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as it does not deviate from the structure of the invention or exceed the scope defined by this claim book, it shall fall within the protection scope of the present invention.

[0050] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0051] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A cutting device for a ball screw processing blank, comprising a cutting frame (1), characterized in that, A material feeding and pressing mechanism (2) is movably connected to the cutting frame (1) through bearings; The material feeding and pressing mechanism (2) includes a coiling cylinder (201), a cutting groove (202), and a pressing groove (203). The two sides of the cutting frame (1) are movably connected to the coiling cylinder (201) through bearings. A cutting groove (202) is formed at the center of the coiling cylinder (201). Pressing grooves (203) are symmetrically formed on the outer wall of the coiling cylinder (201) on both sides of the cutting groove (202); A storage shell (5) is fixed to the cutting frame (1) at the top of the coiling cylinder (201) by bolts. A second transmission assembly (11) is fixed to the cutting frame (1) by bolts. A rotating shaft (12) is fixedly connected to the second transmission assembly (11). A saw blade (13) is sleeved and fixed on the rotating shaft (12). A housing (20) is fixedly connected to the cutting frame (1) on the outside of the coiling cylinder (201).

2. The blank cutting device for ball screw processing according to claim 1, characterized in that, The material feeding and pressing mechanism (2) further includes a top block (204) and a top column (205). The top blocks (204) are symmetrically and slidably connected to the coiling cylinder (201) in the pressing grooves (203). The top column (205) is slidably connected to the coiling cylinder (201). One end of the top column (205) penetrates through one side of the coiling cylinder (201) and is fixedly connected to an abutting head.

3. The blank cutting device for ball screw processing according to claim 2, characterized in that, Two stoppers (6) are symmetrically and slidably connected to the top of the storage shell (5). A first transmission assembly (7) is fixed to the cutting frame (1) by bolts. A threaded rod (8) is fixed to the end of the first transmission assembly (7). One end of the threaded rod (8) penetrates through the stopper (6) and is threadedly connected to the stopper (6). The threads on both sides of the threaded rod (8) are opposite.

4. A blank cutting device for ball screw machining according to claim 3, characterized in that, Rotating arms (17) are evenly and symmetrically movably connected to the inner wall of the coiling cylinder (201). Lifting blocks (18) are fixedly connected to the bottom of the top blocks (204) in the pressing grooves (203). The convex part on the lifting block (18) is clamped in the groove on one side of the rotating arm (17).

5. A blank cutting device for processing ball screws according to claim 4, characterized in that, Rings (16) are evenly sleeved and fixed on the inner wall of the coiling cylinder (201) where the top column (205) is located. The outer wall of the ring (16) abuts against the other side of the rotating arm (17). A spring (19) is installed on the inner wall of the coiling cylinder (201) at the end of the top column (205).

6. A blank cutting device for processing ball screws according to claim 4, characterized in that, A pressing plate (9) is movably connected to the cutting frame (1). An electric push rod (10) is fixed to one side of the cutting frame (1) by bolts. One end of the electric push rod (10) abuts against the pressing plate (9). The other side of the pressing plate (9) abuts against the top column (205).

7. A blank cutting device for processing ball screws according to claim 6, characterized in that, A ratchet (3) is sleeved and fixed on the cutting frame (1) where the coiling cylinder (201) is located. A ratchet pawl (4) is movably connected to the outer wall of the cutting frame (1). One side of the ratchet pawl (4) abuts against the ratchet (3). A blanking shell (15) is slidably connected to the cutting frame (1) at the bottom of the coiling cylinder (201). A third transmission assembly (14) is installed on the cutting frame (1). The end of the third transmission assembly (14) is fixedly connected with a pulley, and the pulley on the outer wall of the coiling cylinder (201) is sleeved with a belt.

8. A blank cutting device for ball screw machining according to claim 7, characterized in that, The cutting method for the blank of the ball screw is as follows: Fixed-length storage of the screw shaft: Put a batch of alloy steel columns to be cut into the storage shell (5), start the first transmission component (7), and the rotation of the threaded rod (8) controls the movement of the two side retaining frames (6) at the top of the storage shell (5) to complete the centering storage of the screw shaft in the storage shell (5). Rotary cutting: The motor in the third transmission component (14) drives the winding cylinder (201) to rotate, so that a single screw shaft at the bottom of the storage shell (5) drops into the cutting groove (202), and makes a revolution along with the rotation of the winding cylinder (201). The second transmission component (11) drives the saw blade (13) on the rotating shaft (12) to rotate. At this time, the electric push rod (10) pushes the entire pressing plate (9) to rotate, causing the top column (205) to move towards the inner wall of the winding shell and pushing the entire rotating arm (17) to rotate, thereby pushing the top block (204) in the pressing groove (203) outwards to clamp both sides of the screw shaft to be cut. Along with the rotation of the entire winding cylinder (201), the screw shaft abutted against the inner side of the housing (20) rotates due to being unable to be discharged from the cutting groove (202), and cooperates with the high-speed rotating saw blade (13) to complete the cutting of the screw shaft.

Images