A bar sharpening machine

Abstract

The purpose of the present invention is to propose a bar sharpening machine, comprising a transport device including a rotating wheel, a first supporting tray, a second supporting tray, a material pressing assembly and a material receiving plate, which can transport the bar; a sharpening device including a fixed plate, a first adjusting plate, a second adjusting plate, a fourth motor and a cutter disc, which can sharpen the head of the bar; a forming device including a mounting frame, a second motor, a third motor, a first saw blade and a second saw blade, which can round the tail of the bar and open a groove.

Description

Technical Field

[0001] The invention relates to the field of wood processing, in particular to a bar sharpening machine. Background Art

[0002] A sharpening machine is a wood cutting and processing machine, which is commonly used to produce disposable wooden bamboo chopsticks. It can sharpen the head end of chopsticks, round the tail end of chopsticks, and cut two grooves on the tail of chopsticks. Existing sharpening machines mostly transport chopsticks to the saw blade through a tray, but existing trays are mostly arc-shaped, which causes the intersection of the cutter and the tray to be non-concentric, which will cause the chopsticks to be cut into an eccentric shape during the saw blade process, that is, the groove part that needs to be cut is deep on one side and shallow on the other side, and the center of the chopstick tip that needs to be cut deviates from the chopstick body, resulting in poor quality of chopsticks, unsightly deformed shapes, and inconvenient use of the chopstick tips due to offset and bending.

[0003] A disposable chopstick sharpening machine proposed in CN201810853093.0 includes a frame base, a sharpening device and a dislocation separation device, wherein the sharpening device and the dislocation separation device are arranged at the top of the frame base, and the sharpening device is arranged on one side of the dislocation separation device, a lever is fixedly arranged at one end of the dislocation separation device, a bracket is fixedly arranged at one end of the lever, the bottom end of the bracket is fixedly connected to the top of the frame base, a first conveyor belt is arranged directly below the dislocation separation device, and a plurality of placement grooves are arranged on the outer wall of the first conveyor belt. This invention arranges the sharpening device, the dislocation separation device and the feeding device on the same device, utilizes automated sharpening and separation of disposable chopsticks, reduces the manual operation process, and can not only greatly improve the production efficiency of disposable chopsticks, but also achieve the effect of cost saving. At the same time, the device is simple to operate, safe to use, and suitable for large-scale processing and production of disposable chopsticks, but does not solve the above-mentioned problems.

[0004] The present invention can transport the bar material in an arc through the provided transport device and ensure the concentricity between the bar material and the saw blade, so that the bar material is uniformly concentric during the cutting process, and is beautiful and easy to use. Summary of the invention

[0005] To solve the above problems, the purpose of the present invention is to provide a bar sharpening machine, which can transport the bar in an arc through a provided transportation device and ensure the concentricity between the bar and the saw blade, so that the bar is uniformly concentric during the cutting process, and is beautiful and easy to use.

[0006] The present invention provides a bar sharpening machine, comprising a support frame, the support frame is provided with a first motor and a control cabinet, the middle part of the support frame is provided with a transport device, the front and rear ends of the transport device are respectively provided with a sharpening device and a forming device, the transport device and the feeding device are connected to the first motor through a belt group for power, the transport device comprises a rotating wheel, a first supporting tray, a second supporting tray, a material pressing assembly and a material receiving plate, the rotating wheel is divided into two front and rear parts, and is rotatably installed in the middle part of the support frame, the rotating wheel is connected to the first motor for power through a belt group, the first supporting tray is fixed on the support frame and is located between the two rotating wheels, the second supporting tray is located on the side of the rotating wheel, the material pressing assembly is installed above the support frame and is located above the first supporting tray and the second supporting tray, and the material receiving plate is fixed to one end of the support frame. The receiving plate intersects with the outer circle of the rotating wheel to form an inclined surface; the sharpening device includes a fixed plate, a first adjusting plate, a second adjusting plate, a fourth motor and a cutter disc, the fixed plate is fixed to the support frame, the first adjusting plate is installed on the fixed plate, the second adjusting plate is installed on the first adjusting plate, the fourth motor is installed on the second adjusting plate, and the cutter disc is installed on the motor output shaft; the forming device includes a mounting frame, a second motor, a third motor, a first saw blade and a second saw blade, the mounting frame is slidably installed on the support frame and connected to the second bearing tray through a connecting rod, the second motor and the third motor are installed on the mounting frame through multi-layer slide rails, the first saw blade is installed on the output shaft of the second motor and is located on one side of the second bearing tray, and the second saw blade is installed on the output shaft of the third motor and is located on the other side of the second bearing tray.

[0007] Furthermore, the rotating wheel is provided with evenly distributed slots, the tops of the first supporting tray and the second supporting tray are provided with smooth straight paths, and raised arc paths are provided on both sides of the straight paths, and the arc paths are respectively concentric with the first saw blade and the second saw blade.

[0008] Furthermore, the pressing assembly includes a first mounting plate, a driving wheel, a second mounting plate, a pressing wheel, an adjusting wheel and a pressing belt. The first mounting plate is slidably mounted on the support frame and fixed by bolts. The driving wheel is power-connected to the first motor through a gear box and a rotating shaft. The second mounting plate is adjustably mounted on both sides of the middle of the first mounting plate. The adjusting wheel is slidably mounted on the first mounting plate and fixed by bolts. The pressing belt is mounted on the driving wheel, the pressing wheel and the adjusting wheel.

[0009] Furthermore, the pressing belt is located above the first support tray and the second support tray, and the pressing wheel is located at a raised arc path on the first support tray and the second support tray.

[0010] Furthermore, one end of the first adjustment plate is hinged under the fixed plate, and the other end is connected to the fixed plate through an arc-shaped slide groove and bolts. The first adjustment plate is provided with a first screw assembly, and a spherical screw sleeve is rotatably provided on the fixed plate. The first screw assembly is connected to the spherical screw sleeve through a thread.

[0011] Furthermore, one end of the second adjustment plate is connected to the first adjustment plate via a slide rail, and the other end is connected to the second screw assembly and is threadedly connected to the first adjustment plate.

[0012] Furthermore, a displacement measuring scale is provided on one side of the mounting frame, and a chip receiving bucket fixed on the second supporting tray is provided below the first saw blade and the second saw blade.

[0013] Furthermore, a feeding device is provided at one end of the support frame, and the feeding device includes a crankshaft, a tray, a first side plate, a partition, a movable plate and a second side plate. The crankshaft is installed at one end of the support frame, and the crankshaft is powered by a first motor through a belt group. The first side plate is fixed to one end of the support frame, the partition is slidably installed on the first side plate and fixed by bolts, the tray is obliquely slidably installed on the support frame, a slide groove is provided under the tray and connected to the crankshaft, the movable plate is slidably installed on the support frame, a tension spring is connected between the movable plate and the support frame, and the second side plate is slidably installed on the movable plate and fixed by bolts.

[0014] Furthermore, a roller is provided on one side of the tray, an inclined plate is provided on one side of the movable plate, and a cover body is hinged on the first side plate.

[0015] Beneficial effects: 1. A smooth straight path is provided on the top of the first supporting tray and the second supporting tray, and raised arc paths are provided on both sides of the straight path. The arc paths are concentric with the first saw blade and the second saw blade respectively. The sharpening requirements can be met through the smooth straight path, thereby ensuring the concentricity of the sharpened chopstick head and preventing the chopstick head from being skewed and deformed. The concentricity of the groove during the molding process can also be ensured through the raised arc path, making the chopsticks better quality and more beautiful.

[0016] 2. One end of the first adjusting plate is hinged to the bottom of the fixed plate, and the other end is connected to the fixed plate through an arc-shaped slide groove and bolts. The first adjusting plate is provided with a first screw assembly, and a spherical screw sleeve is rotatably provided on the fixed plate. The first screw assembly is connected to the spherical screw sleeve through a thread. One end of the second adjusting plate is connected to the first adjusting plate through a slide rail, and the other end is connected to the second screw assembly and is threadedly connected to the first adjusting plate. The inclination angle of the knife disc can be changed by the first screw assembly, thereby changing the inclination angle of the sharpened part of the produced chopsticks to adapt to different production needs. The height of the knife disc relative to the first supporting tray and the second supporting tray can also be changed by the second screw assembly to adapt to rods of different thicknesses.

[0017] 3. The first side plate is fixed to one end of the support frame, the partition is slidably installed on the first side plate and fixed by bolts, the tray is obliquely slidably installed on the support frame, a slide groove is provided under the tray and connected to the crankshaft, the movable plate is slidably installed on the support frame, a tension spring is connected between the movable plate and the support frame, the second side plate is slidably installed on the movable plate and fixed by bolts, the tray can be moved by the crank to transport the rod material to the rotating wheel, and the movable plate can be repeatedly moved by the movement of the tray to squeeze and push the rod material, so that the rod material is automatically aligned to prevent the rod material from shifting.

[0018] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0020] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0021] Figure 3 The overall structure of the present invention is shown in FIG. Figure 3 .

[0022] Figure 4 The explosion of the present invention Figure 1 .

[0023] Figure 5 The explosion of the present invention Figure 2 .

[0024] Figure 6 The explosion of the present invention Figure 3 .

[0025] Figure 7 The overall structure of the present invention is shown in FIG. Figure 4 .

[0026] Figure 8 The overall structure of the present invention is shown in FIG. Figure 5 .

[0027] Fig. 9 The overall structure of the present invention is shown in FIG. Figure 6 .

[0028] Fig.10 The overall structure of the present invention is shown in FIG. Figure 7 .

[0029] Fig.11 The present invention Fig.10 A magnified view of point A.

[0030] Fig.12 The overall structure of the present invention is shown in FIG. Figure 8 .

[0031] Fig.13 The explosion of the present invention Figure 4 .

[0032] Fig.14 The explosion of the present invention Figure 5 .

[0033] Figure numerals: support frame 1; control cabinet 2; crankshaft 3; tray 4; first side plate 5; partition 6; movable plate 7; second side plate 8; first motor 9; cover body 10; rotating wheel 11; first mounting plate 12; driving wheel 13; second mounting plate 14; pressing wheel 15; adjusting wheel 16; pressing belt 17; first supporting tray 18; second supporting tray 19; mounting frame 20; second motor 21; third motor 22; first saw blade 23; second saw blade 24; chip receiving bucket 25; chip removal cover 26; fixing plate 27; first adjusting plate 28; first screw assembly 29; spherical screw sleeve 30; second adjusting plate 31; second screw assembly 32; fourth motor 33; cutter disc 34; receiving plate 35. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0035] Hereinafter, a bar sharpening machine according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 - Fig.14 As shown, the bar sharpening machine includes a support frame 1, on which a first motor 9 and a control cabinet 2 are provided. A transport device is provided in the middle of the support frame 1, and a sharpening device and a forming device are provided at the front and rear ends of the transport device respectively. The transport device and the feeding device are connected to the first motor 9 by a belt group.

[0036] like Figure 2 , Figure 6 and Figure 7As shown, the bar sharpening machine includes a transport device, which includes a rotating wheel 11, a first supporting tray 18, a second supporting tray 19, a pressing assembly and a receiving plate 35. The rotating wheel 11 is divided into two parts, front and rear, and is rotatably installed in the middle of the support frame 1. The rotating wheel 11 is connected to the first motor 9 through a belt group for power. The first supporting tray 18 is fixed on the support frame 1 and is located between the two rotating wheels 11. The second supporting tray 19 is located on the side of the rotating wheel 11. The pressing assembly is installed above the support frame 1 and is located above the first supporting tray 18 and the second supporting tray 19. The receiving plate 35 is fixed to one end of the support frame 1. The receiving plate 35 intersects with the outer circle of the rotating wheel 11 to form an inclined surface. The rotating wheel 11 is provided with evenly distributed card grooves. The tops of the first supporting tray 18 and the second supporting tray 19 are provided with smooth straight paths, and the straight paths are provided with raised protrusions on both sides. An arc path is provided, wherein the arc path is concentric with the first saw blade 23 and the second saw blade 24 respectively. The pressing assembly comprises a first mounting plate 12, a driving wheel 13, a second mounting plate 14, a pressing wheel 15, an adjusting wheel 16 and a pressing belt 17. The first mounting plate 12 is slidably mounted on the support frame 1 and fixed by bolts. The driving wheel 13 is power-connected to the first motor 9 through a gear box and a rotating shaft. The second mounting plate 14 is adjustably mounted on both sides of the middle of the first mounting plate 12. The adjusting wheel 16 is slidably mounted on the first mounting plate 12 and fixed by bolts. The pressing belt 17 is mounted on the driving wheel 13, the pressing wheel 15 and the adjusting wheel 16. The pressing belt 17 is located above the first tray 18 and the second tray 19. The pressing wheel 15 is located at the raised arc path on the first tray 18 and the second tray 19.

[0037] In a specific embodiment: when in use, the first motor 9 drives the rotating wheel 11 to rotate through the belt group, and the rotating wheel 11 clamps the rod material in the clamping slot through the evenly distributed clamping slots, thereby driving the rod material to move and transport, and then the rod material is cut and sharpened. When the cut rod material is transported to the receiving plate through the rotating wheel 11, the inclined receiving plate 35 will separate the rod material from the clamping slot of the rotating wheel 11 to realize material discharge.

[0038] During the transportation process, the driving wheel 13 is rotated by the first motor 9, thereby driving the pressing belt 17 to rotate on the pressing wheel 15 and the adjusting wheel 16. At the same time, due to the extrusion of the first supporting tray 18 and the second supporting tray 19 below, the upper concave of the pressing belt 17 fits the first supporting tray 18 and the second supporting tray 19, and fits the pressing wheel 15, so that when the bar passes through the first supporting tray 18 and the second supporting tray 19, the bar is pressed to prevent the bar from escaping from the card slot of the rotating wheel 11, and the rotating pressing belt 17 will also drive the bar to rotate, so that the cutting and forming of the bar is more uniform.

[0039] like Fig.12 , Fig.13 and Fig.14 As shown, the bar sharpening machine includes a sharpening device, which includes a fixed plate 27, a first adjusting plate 28, a second adjusting plate 31, a fourth motor 33 and a cutter disc 34. The fixed plate 27 is fixed on the support frame 1, the first adjusting plate 28 is installed on the fixed plate 27, the second adjusting plate 31 is installed on the first adjusting plate 28, the fourth motor 33 is installed on the second adjusting plate 31, and the cutter disc 34 is installed on the motor output shaft. One end of the first adjusting plate 28 is hinged to the bottom of the fixed plate 27, and the other end is connected to the fixed plate 27 through an arc groove and bolts. A first screw assembly 29 is provided on the first adjusting plate 28, and a spherical screw sleeve 30 is rotatably provided on the fixed plate 27. The first screw assembly 29 is connected to the spherical screw sleeve 30 by threading. One end of the second adjusting plate 31 is connected to the first adjusting plate 28 through a slide rail, and the other end is connected to the second screw assembly 32 and is threadedly connected to the first adjusting plate 28.

[0040] In a specific embodiment: when in use, the rod material is moved to the bottom of the cutter disc 34 through the rotation of the rotating wheel 11, and the cutter disc 34 is rotated by the fourth motor 33 to sharpen the rod material below. Moreover, under the action of the straight path at the upper ends of the first supporting tray 18 and the second supporting tray 19, the rod material forms a linear motion below the cutter disc 34, so that the sharpened position of the head of the produced chopsticks is more concentric with the chopstick body, more beautiful and straight, and convenient to use. The debris generated during the cutting process of the cutter disc 34 will be collected and discharged through the chip removal cover 26.

[0041] During adjustment, the first screw assembly 29 is rotated to push the first adjustment plate 28 to rotate under the fixed plate 27, and at the same time, the spherical screw sleeve 30 is driven to rotate on the fixed plate 27 to change the angle, and then the arc-shaped slide groove at one end of the first adjustment plate 28 is re-fixed with bolts to change the inclination angle of the knife disc 34, thereby changing the inclination angle of the sharpened part of the produced chopsticks to adapt to different production needs; the second screw assembly 32 can also drive the second adjustment plate 31 to move up and down on the first adjustment plate 28, thereby changing the height of the knife disc 34 relative to the first support tray 18 and the second support tray 19, so as to adapt to rods of different thicknesses.

[0042] like Figure 8 and Fig. 9As shown, the bar sharpening machine includes a forming device, which includes a mounting frame 20, a second motor 21, a third motor 22, a first saw blade 23 and a second saw blade 24. The mounting frame 20 is slidably mounted on the support frame 1 and is connected to the second support tray 19 through a connecting rod. The second motor 21 and the third motor 22 are mounted on the mounting frame 20 through multi-layer slide rails. The first saw blade 23 is mounted on the output shaft of the second motor 21 and is located on one side of the second support tray 19. The second saw blade 24 is mounted on the output shaft of the third motor 22 and is located on the other side of the second support tray 19. A displacement measuring ruler is provided on one side of the mounting frame 20 to facilitate observation of the moving distance of the mounting frame 20. A chip receiving bucket 25 fixed to the second support tray 19 is provided below the first saw blade 23 and the second saw blade 24.

[0043] During adjustment, the overall position of the second motor 21 and the third motor 22 is adjusted by changing the position of the mounting frame 20 to adapt to rods of different lengths. The positions of the second motor 21 and the third motor 22 relative to the mounting frame 20 can also be changed separately through multi-layer slide rails to meet different production needs.

[0044] In a specific embodiment: when in use, the first saw blade 23 and the second saw blade 24 are driven to rotate by the second motor 21 and the third motor 22 respectively, so as to cut the bar material passing through the first support tray 18 and the second support tray 19. During the cutting process, the concentricity of the bar material and the first saw blade 23 and the second saw blade 24 is ensured by the raised arc paths on both sides of the first support tray 18 and the second support tray 19. Therefore, under the drive of the pressing belt 17 and the transportation of the rotating wheel 11, the rotating bar material will be cut more evenly and concentrically by the first saw blade 23 and the second saw blade 24, avoiding the groove at the tail of the chopsticks being deep on one side and shallow on the other side, thereby ensuring the quality and appearance of the chopstick production, and the debris generated by the cutting will be collected and discharged through the chip receiving bucket 25 under the first support tray 18.

[0045] like Figure 4 and Figure 5 As shown, the bar sharpening machine includes a feeding device, which includes a crankshaft 3, a tray 4, a first side plate 5, a partition 6, a movable plate 7 and a second side plate 8. The crankshaft 3 is installed at one end of the support frame 1, and the crankshaft 3 is connected to the first motor 9 by a belt group. The first side plate 5 is fixed to one end of the support frame 1, and the partition 6 is slidably installed on the first side plate 5 and fixed by bolts. The tray 4 is obliquely slidably installed on the support frame 1, and a slide groove is provided at the bottom of the tray 4 to be connected with the crankshaft 3. The movable plate 7 is slidably installed on the support frame 1, and a tension spring is connected between the movable plate 7 and the support frame 1. The second side plate 8 is slidably installed on the movable plate 7 and fixed by bolts. A roller is provided on one side of the tray 4, and an inclined plate is provided on one side of the movable plate 7. A cover body 10 is hinged on the first side plate 5.

[0046] In a specific embodiment: when in use, the rods to be cut are placed on the tray 4, and the crankshaft 3 is rotated by the first motor 9, and the tray 4 is driven to move forward and backward through the slide groove under the tray 4, so that the rods to be cut are transported to the rotating wheel 11, and the moving tray 4 will squeeze and push the inclined plate on one side of the moving plate 7 through the roller, and reset under the action of the tension spring, so that the second side plate 8 above the moving plate 7 continuously beats and pushes the rods on the tray 4, so that the rods on the tray 4 are aligned left and right to prevent deviation.

[0047] During adjustment, the height of the partition plate 6 can be adjusted to adjust the conveying speed of the bar material to adapt to different production requirements. The position of the second side plate 8 on the movable plate 7 can also be adjusted to adapt to bars of different lengths.

[0048] Working principle: When in use, the bar to be cut is placed on the tray 4, and the crankshaft 3 is rotated under the drive of the first motor 9, and the tray 4 is driven to move forward and backward through the slide groove under the tray 4, so that the bar to be cut is transported to the rotating wheel 11, and the moving tray 4 will squeeze and push the inclined plate on one side of the moving plate 7 through the roller, and reset under the action of the tension spring, so that the second side plate 8 above the moving plate 7 continuously beats and pushes the bar on the tray 4, so that the bar on the tray 4 is aligned left and right to prevent deviation, and then the first motor 9 drives the rotating wheel 11 to rotate through the belt group, and the rotating wheel 11 clamps the bar in the slot through the evenly distributed slots, thereby driving the bar to move and transport, and then the bar is moved to the bottom of the knife disc 34 through the rotation of the rotating wheel 11, and the knife disc 34 is rotated by the fourth motor 33 to sharpen the bar below, and between the first supporting tray 18 and the second Under the action of the straight path at the upper end of the support tray 19, the bar material forms a straight line motion under the knife disc 34, so that the sharpened position of the head of the produced chopsticks is more concentric with the chopstick body. At the same time, the second motor 21 and the third motor 22 respectively drive the first saw blade 23 and the second saw blade 24 to rotate, so as to cut the bar material passing through the first support tray 18 and the second support tray 19. During the cutting process, the raised arc paths on both sides of the first support tray 18 and the second support tray 19 ensure the concentricity of the bar material and the first saw blade 23 and the second saw blade 24. Therefore, under the drive of the pressing belt 17 and the transportation of the rotating wheel 11, the rotating bar material will be cut more evenly and concentrically by the first saw blade 23 and the second saw blade 24, avoiding the groove at the tail of the chopsticks being deep on one side and shallow on the other side. Then, when the cut bar material is transported to the receiving plate 35 through the rotating wheel 11, the inclined receiving plate 35 will separate the bar material from the card slot of the rotating wheel 11 to realize material discharge.

Claims

1. A bar sharpening machine, comprising a support frame (1), wherein a first motor (9) and a control cabinet (2) are arranged on the support frame (1), characterized in that: A transport device is provided in the middle of the support frame (1), and a sharpening device and a shaping device are provided at the front and rear ends of the transport device respectively. The feeding device and the transport device are connected to the first motor (9) through a belt group. The transport device comprises a rotating wheel (11), a first supporting tray (18), a second supporting tray (19), a material pressing assembly and a material receiving plate (35); the rotating wheel (11) is divided into two parts, a front and a rear part, and is rotatably mounted in the middle of the support frame (1); the rotating wheel (11) is connected to the first motor (9) through a belt group for power; the first supporting tray (18) is fixed on the support frame (1) and is located between the two rotating wheels (11); the second supporting tray (19) is located on the side of the rotating wheel (11); the material pressing assembly is installed above the support frame (1) and is located above the first supporting tray (18) and the second supporting tray (19); the material receiving plate (35) is fixed to one end of the support frame (1); the material receiving plate (35) intersects with the outer circle of the rotating wheel (11) to form an inclined surface; The sharpening device comprises a fixed plate (27), a first adjustment plate (28), a second adjustment plate (31), a fourth motor (33) and a cutter disc (34), wherein the fixed plate (27) is fixed to the support frame (1), the first adjustment plate (28) is mounted on the fixed plate (27), the second adjustment plate (31) is mounted on the first adjustment plate (28), the fourth motor (33) is mounted on the second adjustment plate (31), and the cutter disc (34) is mounted on the motor output shaft; The forming device comprises a mounting frame (20), a second motor (21), a third motor (22), a first saw blade (23) and a second saw blade (24); the mounting frame (20) is slidably mounted on the support frame (1) and connected to the second support tray (19) via a connecting rod; the second motor (21) and the third motor (22) are mounted on the mounting frame (20) via multi-layer slide rails; the first saw blade (23) is mounted on the output shaft of the second motor (21) and is located on one side of the second support tray (19); the second saw blade (24) is mounted on the output shaft of the third motor (22) and is located on the other side of the second support tray (19); The rotating wheel (11) is provided with evenly distributed slots, the tops of the first supporting tray (18) and the second supporting tray (19) are provided with smooth straight paths, and raised arc paths are provided on both sides of the straight paths, and the arc paths are respectively concentric with the first saw blade (23) and the second saw blade (24).

2. A bar sharpening machine according to claim 1, characterized in that: The pressing assembly comprises a first mounting plate (12), a driving wheel (13), a second mounting plate (14), a pressing wheel (15), an adjusting wheel (16) and a pressing belt (17); the first mounting plate (12) is slidably mounted on the support frame (1) and fixed by bolts; the driving wheel (13) is power-connected to the first motor (9) via a gear box and a rotating shaft; the second mounting plate (14) is adjustably mounted on both sides of the middle of the first mounting plate (12); the adjusting wheel (16) is slidably mounted on the first mounting plate (12) and fixed by bolts; and the pressing belt (17) is mounted on the driving wheel (13), the pressing wheel (15) and the adjusting wheel (16).

3. A bar sharpening machine as claimed in claim 2, characterized in that: The pressing belt (17) is located above the first supporting tray (18) and the second supporting tray (19), and the pressing wheel (15) is located at a raised arc path on the first supporting tray (18) and the second supporting tray (19).

4. A bar sharpening machine according to claim 1, characterized in that: One end of the first adjustment plate (28) is hinged to the bottom of the fixed plate (27), and the other end is connected to the fixed plate (27) via an arc-shaped slide groove and bolts. The first adjustment plate (28) is provided with a first screw assembly (29). A spherical screw sleeve (30) is rotatably provided on the fixed plate (27). The first screw assembly (29) is connected to the spherical screw sleeve (30) via a thread.

5. A bar sharpening machine as claimed in claim 1, characterized in that: One end of the second adjustment plate (31) is connected to the first adjustment plate (28) via a slide rail, and the other end is connected to the second screw assembly (32) and is threadedly connected to the first adjustment plate (28).

6. A bar sharpening machine as claimed in claim 1, characterized in that: A displacement measuring ruler is provided on one side of the mounting frame (20), and a chip receiving bucket (25) fixed on the second supporting tray (19) is provided below the first saw blade (23) and the second saw blade (24).

7. A bar sharpening machine as claimed in claim 1, characterized in that: A feeding device is provided at one end of the support frame (1), and the feeding device comprises a crankshaft (3), a tray (4), a first side plate (5), a partition plate (6), a movable plate (7) and a second side plate (8). The crankshaft (3) is mounted on one end of the support frame (1), and the crankshaft (3) is connected to a first motor (9) by a belt group. The first side plate (5) is fixed to one end of the support frame (1), and the partition plate (6) is slidably mounted on the first side plate (5) and fixed by bolts. The tray (4) is obliquely slidably mounted on the support frame (1), and a slide groove is provided below the tray (4) and connected to the crankshaft (3). The movable plate (7) is slidably mounted on the support frame (1), and a tension spring is connected between the movable plate (7) and the support frame (1). The second side plate (8) is slidably mounted on the movable plate (7) and fixed by bolts.

8. A bar sharpening machine according to claim 7, characterized in that: A roller is provided on one side of the tray (4), an inclined plate is provided on one side of the movable plate (7), and a cover body (10) is hingedly connected to the first side plate (5).

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