Rail cutting device and method of using the same

Abstract

The present invention discloses a rail cutting device and a method for using the same, which relates to the technical field of rail cutting and includes a clamping mechanism and a cutting mechanism, wherein the clamping mechanism includes a hydraulic cylinder 1, a clamping plate, a clamping roller, and a motor 1. The hydraulic cylinder 1 drives the clamping plate and the clamping roller to press against both sides of the rail, thereby clamping the rail in the center during cutting. The motor 1 then drives the clamping roller to rotate, thereby horizontally conveying the rail before and after cutting. The cutting mechanism is arranged directly above the clamping mechanism. The cutting mechanism includes a hydraulic cylinder 2, a steel saw blade, a swing rod, and a motor 2. The hydraulic cylinder 2 drives the steel saw blade to slowly descend. At the same time, the motor 2 drives the steel saw blade to move back and forth via the swing rod, thereby vertically cutting the clamped rail. The rail cutting device of the present invention has the characteristics of reasonable scheme, ingenious structure, and easy use, and can significantly improve the working temperature and service life of the steel saw blade.

Description

Technical Field

[0001] The present invention relates to the technical field of rail cutting, and in particular to a rail cutting device and a method for using the same. Background Art

[0002] Our company's products include railway turnouts. When actually producing turnouts, rails, as the main raw material, need to be sawn to the required size according to the design dimensions. Rail cutting machines are indispensable machines, and the quality of rail cutting directly affects product quality.

[0003] Existing rail cutting machines require manual measurement and cutting, which is time-consuming and labor-intensive. Furthermore, there is no effective stabilizing component to support and secure the rail during cutting. Heat easily accumulates on the cutting surface of the rail, affecting its continued use and life expectancy. Furthermore, debris easily accumulates on the cutting surface, all of which affects cutting efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a rail cutting device and a method of using the same to solve the above-mentioned defects caused by the prior art.

[0005] A rail cutting device and a method of using the same, comprising a clamping mechanism and a cutting mechanism, wherein:

[0006] The clamping mechanism includes a hydraulic cylinder, a clamping plate, a clamping roller, and a motor. The hydraulic cylinder drives the clamping plate and the clamping roller to press against both sides of the rail to achieve centering and clamping of the rail during cutting. The motor then drives the clamping roller to rotate to achieve transverse transportation of the rail before and after cutting.

[0007] The cutting mechanism is arranged directly above the clamping mechanism. The cutting mechanism includes a second hydraulic cylinder, a steel saw blade, a swing rod and a second motor. The steel saw blade is driven to slowly descend by the second hydraulic cylinder. At the same time, the steel saw blade is driven to move back and forth by the second motor via the swing rod to realize vertical cutting of the clamped rails.

[0008] Preferably, the clamping mechanism further includes a horizontal mounting plate and support rollers. The horizontal mounting plate is horizontally arranged, and a pair of horizontal mounting bars are symmetrically mounted on the upper side of the horizontal mounting plate. A plurality of support rollers are provided and evenly connected between the two horizontal mounting bars. On the left and right sides of all the support rollers, the horizontal mounting plate is symmetrically provided with two pairs of mounting plates. A plurality of hydraulic cylinders I are provided and correspondingly mounted on the sides of each mounting plate. The hydraulic cylinders I are horizontally arranged inward and a "C"-shaped clamping plate is connected to the end of each piston rod. A plurality of clamping rollers are rotatably connected to the opening side of the clamping plate. The circumferential surface of the clamping roller matches the head part of the rail. A first belt pulley is key-connected to the upper end of the clamping roller. A plurality of motors I are provided and correspondingly mounted on the sealing side of each clamping plate. The motors I are vertically arranged upward and a second belt pulley is key-connected to the output end thereof. The second belt pulley is connected to the adjacent first belt pulley by a transmission belt. A pair of guide columns are symmetrically connected to the front and rear of the outside of the clamping plate. The guide columns are slidably connected to the mounting plate through guide sleeves. A pair of support frames are symmetrically mounted on the front and rear of the lower side of the horizontal mounting plate, and a pair of support feet are symmetrically mounted on the left and right of the lower side of the support frame.

[0009] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The lower sprocket is meshed with tooth on upper sprocket.

[0010] Preferably, a rectangular chip removal opening is provided in the middle of the transverse mounting plate, and the chip removal opening is located directly below the hacksaw blade.

[0011] Preferably, a rectangular avoidance groove is provided in the middle of the transverse mounting bar, and the avoidance groove is located directly below the hacksaw blade.

[0012] Preferably, a row of equally spaced liquid inlet holes is provided on the back of the sliding tube, and a liquid guide tube is connected to each liquid inlet hole, and all the liquid guide tubes are connected to the positive pressure coolant. A row of equally spaced liquid outlet holes is provided on the bottom surface of the sliding tube, and all the liquid outlet holes are located directly above the hacksaw blade.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. Automatically clamp and transport rails. The rails are hoisted onto a row of support rollers using a hoisting device. The hydraulic cylinders on both sides drive the corresponding clamping rollers to clamp the rail head. The motor then drives the clamping rollers via a belt drive to rotate, aligning the preset cutting surface of the rail directly below the hacksaw blade.

[0015] 2. Automatic rail cutting. The two hydraulic cylinders on both sides drive the hacksaw blade to move downward intermittently. At the same time, the second motor drives the sliding tube and the hacksaw blade to move back and forth through the crank rocker mechanism. The relative movement between the hacksaw blade and the rail enables the clamped rail to be cut vertically and severed. The iron chips generated by the cutting are smoothly discharged through the chip discharge port.

[0016] 3. Automatic cleaning of the hacksaw blade. When the sliding tube moves to the left, the one-way bearing is stuck, and the rack pushes the gear to rotate and transmits torque to the gear shaft, causing the cam and gear to rotate synchronously by the same angle. The cam then pushes the hacksaw blade downward to a certain depth through the abutment bar. When the sliding tube moves to the right, the one-way bearing is active, and the rack pushes the gear to rotate, but cannot transmit torque to the gear shaft, causing the cam to remain stationary. When the top surface of the abutment bar instantly returns from the cam's travel angle to the near-rest angle, the hacksaw blade is subjected to an instantaneous impact force, which helps shake off debris from the hacksaw blade.

[0017] 4. Automatic cooling of hacksaw blades. When cutting rails, the coolant under positive pressure is introduced into the sliding tube through the liquid inlet hole through the liquid guide tube, and sprayed out through the liquid outlet hole to the hacksaw blade below to cool and lubricate the hacksaw blade. At the same time, it flushes away debris in the cutting gap. In addition, it can also cool and lubricate the cutting gap on the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the present invention as a whole.

[0020] Figures 3 to 5 It is a structural schematic diagram of the clamping mechanism in the present invention.

[0021] Figures 6 to 8 It is a structural schematic diagram of the cutting mechanism in the present invention.

[0022] in:

[0023] 10-Clamping mechanism; 101-Horizontal mounting plate; 101a-Chip removal port; 102-Horizontal mounting bar; 102a-Avoidance groove; 103-Support roller; 104-Mounting plate; 105-Hydraulic cylinder 1; 106-Clamping plate; 107-Clamping roller; 108-Pulley 1; 109-Motor 1; 110-Pulley 2; 111-Drive belt; 112-Guide column; 113-Guide sleeve; 114-Support frame; 115-Support foot;

[0024] 20 - cutting mechanism; 201 - vertical mounting plate; 202 - lifting plate; 203 - hydraulic cylinder (II); 204 - straight guide rail; 205 - sliding block; 206 - sliding plate; 207 - limit plate; 208 - compression spring (I); 209 - sliding tube; 209a - liquid inlet; 209b - liquid outlet; 210 - mounting bar; 211 - hacksaw blade; 212 - mounting shaft; 213 - mounting tube; 214 - swing lever; 214a - swing slot; 215 - motor (II); 216 - rotating disk; 217 - rotating lever; 218 - liquid guide tube; 219 - gear shaft; 220 - gear; 221 - mounting frame; 222 - rack; 223 - connecting pin; 224 - compression spring (II); 225 - cam; 226 - contact bar;

[0025] 30-Steel rails. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figures 1 to 8 As shown, a rail cutting device and a method of using the same include a clamping mechanism 10 and a cutting mechanism 20, wherein:

[0028] The clamping mechanism 10 includes a hydraulic cylinder 105, a clamping plate 106, a clamping roller 107, and a motor 109. The hydraulic cylinder 105 drives the clamping plate 106 and the clamping roller 107 to press against both sides of the rail 30 to achieve centering and clamping of the rail 30 during cutting. The motor 109 then drives the clamping roller 107 to rotate to achieve transverse conveyance of the rail 30 before and after cutting.

[0029] The cutting mechanism 20 is arranged directly above the clamping mechanism 10. The cutting mechanism 20 includes a hydraulic cylinder 203, a steel saw blade 211, a swing rod 214 and a motor 215. The hydraulic cylinder 203 drives the steel saw blade 211 to slowly descend. At the same time, the motor 215 drives the steel saw blade 211 to move back and forth via the swing rod 214, thereby realizing vertical cutting of the clamped rail 30.

[0030] In this embodiment, the clamping mechanism 10 further includes a horizontal mounting plate 101 and support rollers 103. The horizontal mounting plate 101 is horizontally arranged, and a pair of horizontal mounting strips 102 are symmetrically installed on the upper side of the horizontal mounting plate 101. A plurality of support rollers 103 are provided and evenly connected between the two horizontal mounting strips 102. On the left and right sides of all the support rollers 103, the horizontal mounting plate 101 is symmetrically installed with two pairs of mounting plates 104. A plurality of first hydraulic cylinders 105 are provided and correspondingly installed on the sides of each mounting plate 104. The first hydraulic cylinders 105 are horizontally arranged inward and a "C"-shaped clamping plate 106 is connected to the end of each piston rod. A plurality of clamping rollers 107 are rotatably connected to the opening side of the clamping plate 106. The circumferential surface of the clamping rollers 107 matches the rail head part of the rail 30. A first pulley 108 is key-connected to the upper end of the clamping roller 107. A plurality of first motors 109 are provided and correspondingly installed on the closed side of each clamping plate 106. The first motors 109 are vertically arranged upward and a second pulley 110 is key-connected to the output end thereof. The second pulley 110 and the adjacent first pulley 108 are connected by a transmission belt 111. A pair of guide columns 112 are symmetrically connected to the front and rear sides of the outside of the clamping plate 106. The guide columns 112 are slidably connected to the mounting plate 104 through guide sleeves 113. A pair of support frames 114 are symmetrically installed on the front and rear sides of the lower side of the horizontal mounting plate 101, and a pair of support feet 115 are symmetrically installed on the left and right sides of the lower side of the support frames 114.

[0031] In this embodiment, the cutting mechanism 20 further includes a vertical mounting plate 201 and a sliding tube 209. The vertical mounting plate 201 is vertically arranged directly above the horizontal mounting plate 101. The hydraulic cylinder 203 is provided with a pair and is symmetrically installed on the horizontal mounting plate 101. The hydraulic cylinder 203 is vertically upwardly arranged and is connected to a lifting plate 202 at the end of its piston rod, and the lifting plate 202 is horizontally installed on the lower side of the vertical mounting plate 201. The front side of the vertical mounting plate 201 is symmetrically connected to a pair of straight guide rails 204. A sliding block 205 is slidably connected to the straight guide rail 204, and an "L" is connected to the sliding block 205. The vertical mounting plate 201 is provided with a limit plate 207 at the lower end of the straight guide rail 204. A plurality of compression springs 208 are evenly connected between the limit plate 207 and the sliding plate 206 on the same side. The sliding tube 209 is slidably inserted on the sliding plates 206 on both sides. The hacksaw blade 211 is connected to the lower side of the sliding tube 209 in parallel through a pair of mounting strips 210. The upper part of the vertical mounting plate 201 is rotatably connected to the mounting shaft 212, and a mounting tube 213 is welded to the front end of the mounting shaft 212. The swing rod 214 is slidably inserted into the interior of the mounting tube 213, and the swing rod The lower end of 214 is hinged to the middle of the sliding tube 209, and a long swing groove 214a is provided in parallel on the swing rod 214. The motor 215 is installed horizontally and forwardly in the middle of the vertical mounting plate 201, and a rotating disk 216 is connected to the output end of the motor 215. The front side of the rotating disk 216 is eccentrically connected to the rotating rod 217, and the rotating rod 217 is inserted into the swing groove 214a on the same side. The vertical mounting plate 201 is rotatably connected to the gear shaft 219 above the straight guide rail 204, and a gear 220 is connected to the front end of the gear shaft 219 through a one-way bearing key. The sliding tube 2 A pair of "L"-shaped mounting brackets 221 are symmetrically connected to the upper side of 09, and a rack 222 is provided parallel to the upper side of the mounting bracket 221. The rack 222 is slidably connected to the mounting bracket 221 through a number of connecting pins 223. The connecting pins 223 are provided with a compression spring 224 between the mounting bracket 221 and the rack 222. The rack 222 on the same side is engaged with the bottom of the gear 220. The gear shaft 219 is also keyed with a cam 225. The sliding plate 206 is vertically connected with an abutment bar 226. The upper end face of the abutment bar 226 on the same side abuts against the contour surface of the cam 225.

[0032] In this embodiment, a rectangular chip discharge opening 101a is provided in the middle of the horizontal mounting plate 101, and the chip discharge opening 101a is located directly below the hacksaw blade 211. Iron chips generated by cutting can be discharged smoothly through the chip discharge opening 101a, preventing the iron chips from accumulating on the upper side of the horizontal mounting plate 101.

[0033] In this embodiment, a rectangular avoidance groove 102a is provided in the middle of the cross-mounting bar 102, and the avoidance groove 102a is located directly below the hacksaw blade 211. The avoidance groove 102a can prevent the hacksaw blade 211 from cutting the cross-mounting bar 102 and damaging the hacksaw blade 211 when cutting the rail 30.

[0034] In this embodiment, the back of the sliding tube 209 is provided with a row of evenly spaced liquid inlet holes 209a. Each liquid inlet hole 209a is connected to a liquid guide tube 218, connecting all liquid guide tubes 218 to a positive-pressure coolant. The bottom of the sliding tube 209 is provided with a row of evenly spaced liquid outlet holes 209b, all of which are located directly above the hacksaw blade 211. The positive-pressure coolant is introduced into the sliding tube 209 through the liquid inlet holes 209a via the liquid guide tubes 218, and then ejected through the liquid outlet holes 209b toward the hacksaw blade 211 below, thereby cooling and lubricating the hacksaw blade 211.

[0035] In this embodiment, the cam 225 has a near rest angle of 5°, a push stroke motion angle of 355°, a far rest angle of 0°, and a return stroke motion angle of 0°.

[0036] The actual application of this rail cutting equipment includes the following working steps:

[0037] Step 1: Use a lifting device to hoist the rail 30 above a row of support rollers 103. Then, use hydraulic cylinders 105 on both sides to drive the corresponding clamping rollers 107 to clamp the rail head of the rail 30. Then, use motor 109 to drive the clamping rollers 107 through belt transmission to rotate, so that the preset cutting surface of the rail 30 is aligned directly below the hacksaw blade 211.

[0038] Step 2: The second hydraulic cylinders 203 on both sides drive the hacksaw blade 211 to move downward intermittently. At the same time, the second motor 215 drives the sliding tube 209 and the hacksaw blade 211 to move back and forth left and right through the crank rocker mechanism. The relative movement between the hacksaw blade 211 and the rail 30 realizes the vertical cutting and severing of the clamped rail 30. The iron chips generated by the cutting are smoothly discharged through the chip discharge port 101a.

[0039] Step 3: When the sliding tube 209 moves to the left, since the one-way bearing is in a stuck state, the rack 222 will push the gear 220 to rotate and transmit the torque to the gear shaft 219, so that the cam 225 and the gear 220 rotate synchronously by the same angle, and the cam 225 will push the hacksaw blade 211 downward to a certain depth through the abutment bar 226. When the sliding tube 209 moves to the right, since the one-way bearing is in an active state, the rack 222 will push the gear 220 to rotate, but it cannot transmit the torque to the gear shaft 219, so that the cam 225 will remain stationary. When the top surface of the abutment bar 226 instantly returns to the near-rest angle part from the push angle part of the cam 225, the hacksaw blade 211 is subjected to an instantaneous impact force, which helps to shake off the debris on the hacksaw blade 211.

[0040] Step 4: When cutting the rail 30, the coolant under positive pressure is introduced into the interior of the sliding tube 209 through the liquid inlet hole 209a via the liquid guide tube 218, and is sprayed out through the liquid outlet hole 209b and toward the hacksaw blade 211 below, thereby cooling and lubricating the hacksaw blade 211 and flushing away debris in the cutting gap. In addition, the cutting gap on the rail 30 is also cooled and lubricated.

[0041] Step 5: After cutting the rail 30, the two hydraulic cylinders 203 on both sides drive the steel saw blade 211 to move upward quickly, and then the motor 109 drives the clamping roller 107 to rotate through the belt transmission, and the cut rail 30 is transported horizontally.

[0042] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A rail cutting device, characterized in that: It comprises a clamping mechanism (10) and a cutting mechanism (20), wherein: The clamping mechanism (10) includes a hydraulic cylinder (105), a clamping plate (106), a clamping roller (107) and a motor (109). The hydraulic cylinder (105) drives the clamping plate (106) and the clamping roller (107) to abut against both sides of the rail (30), thereby achieving centering and clamping of the rail (30) during cutting. The motor (109) then drives the clamping roller (107) to rotate, thereby achieving transverse transportation of the rail (30) before and after cutting. The cutting mechanism (20) is arranged just above the clamping mechanism (10). The cutting mechanism (20) includes a second hydraulic cylinder (203), a steel saw blade (211), a swing rod (214) and a second motor (215). The second hydraulic cylinder (203) drives the steel saw blade (211) to slowly descend. At the same time, the second motor (215) drives the steel saw blade (211) to move back and forth via the swing rod (214), thereby realizing vertical cutting of the clamped rail (30). The clamping mechanism (10) further includes a horizontal mounting plate (101) and support rollers (103). The horizontal mounting plate (101) is horizontally arranged, and a pair of horizontal mounting bars (102) are symmetrically mounted on the upper side of the horizontal mounting plate (101) left and right. A rectangular chip discharge port (101a) is provided in the middle of the horizontal mounting plate (101), and the chip discharge port (101a) is located directly below the hacksaw blade (211). A rectangular avoidance groove (102a) is provided in the middle of the horizontal mounting bar (102), and the avoidance groove (102a) is located directly below the hacksaw blade (211). A number of support rollers (103) are provided and are evenly connected between the two horizontal mounting bars (102). On the left and right sides of all the support rollers (103), the horizontal mounting plate (101) is symmetrically mounted with two pairs of mounting plates (104). A number of first hydraulic cylinders (105) are provided and are correspondingly mounted on the sides of each mounting plate (104). The first hydraulic cylinders (105) are horizontally arranged inward and a "C"-shaped clamping plate (106) is connected to the end of each piston rod. A number of clamping rollers (107) are rotatably connected to the open side of the clamping plate (106). The circumferential surface of the clamping roller (107) matches the head part of the rail (30). A first belt pulley (108) is key-connected to the upper end of the clamping roller (107). A number of first motors (109) are provided and are correspondingly mounted on the closed side of each clamping plate (106). The first motors (109) are vertically arranged upward and a second belt pulley (110) is key-connected to the output end thereof. The second belt pulley (110) is connected to the adjacent first belt pulley (108) by a transmission belt (111). A pair of guide columns (112) are symmetrically connected to the front and rear of the outside of the clamping plate (106). The guide columns (112) are slidably connected to the mounting plate (104) through guide sleeves (113). A pair of support frames (114) are symmetrically mounted on the front and rear of the lower side of the horizontal mounting plate (101), and a pair of support feet (115) are symmetrically mounted on the left and right of the lower side of the support frames (114); The cutting mechanism (20) further comprises a vertical mounting plate (201) and a sliding tube (209), wherein the vertical mounting plate (201) is vertically arranged directly above the horizontal mounting plate (101), and the hydraulic cylinder (203) is provided with a pair and is symmetrically mounted on the horizontal mounting plate (101), wherein the hydraulic cylinder (203) is vertically upwardly arranged and is connected to a lifting plate (202) at the end of its piston rod, and the lifting plate (202) is horizontally mounted on the lower side of the vertical mounting plate (201), and the front side of the vertical mounting plate (201) is symmetrically connected to a pair of straight guide rails (204), a sliding block (205) is slidably connected to the straight guide rail (204), and an "L"-shaped sliding plate (205) is connected to the sliding block (205). 06), the vertical mounting plate (201) is installed with a limit plate (207) at the lower end of the straight guide rail (204), and a plurality of compression springs (208) are evenly connected between the limit plate (207) and the sliding plate (206) on the same side. The sliding tube (209) is slidably inserted on the sliding plates (206) on both sides. The steel saw blade (211) is connected to the lower side of the sliding tube (209) in parallel through a pair of mounting strips (210). The upper part of the vertical mounting plate (201) is rotatably connected to the mounting shaft (212), and a mounting tube (213) is welded to the front end of the mounting shaft (212). The swing rod (214) is slidably inserted into the interior of the mounting tube (213), and the swing rod (214) is The lower end is hinged to the middle of the sliding tube (209), and a long strip swing groove (214a) is provided in parallel on the swing rod (214). The second motor (215) is installed horizontally and forwardly in the middle of the vertical mounting plate (201), and a rotating disk (216) is keyed to the output end of the second motor (215). The front side of the rotating disk (216) is eccentrically connected to a rotating rod (217), and the rotating rod (217) is inserted into the swing groove (214a) on the same side. The vertical mounting plate (201) is rotatably connected to a gear shaft (219) above the straight guide rail (204), and a gear (220) is connected to the front end of the gear shaft (219) through a one-way bearing key. The sliding tube (209) A pair of "L"-shaped mounting frames (221) are symmetrically connected to the upper side, and a rack (222) is provided above the mounting frame (221) in parallel. The rack (222) is slidably connected to the mounting frame (221) through a plurality of connecting pins (223). The connecting pins (223) are provided with a compression spring (224) between the mounting frame (221) and the rack (222). The rack (222) on the same side is engaged with the lower side of the gear (220). The gear shaft (219) is also keyed to a cam (225). The sliding plate (206) is vertically connected to an abutment bar (226). The upper end surface of the abutment bar (226) on the same side abuts against the contour surface of the cam (225).

2. The rail cutting device according to claim 1, characterized in that: The back surface of the sliding tube (209) is provided with a row of liquid inlet holes (209a) distributed at equal intervals, and each liquid inlet hole (209a) is connected to a liquid guide tube (218), and all the liquid guide tubes (218) are connected to a positive pressure coolant. The bottom surface of the sliding tube (209) is provided with a row of liquid outlet holes (209b) distributed at equal intervals, and all the liquid outlet holes (209b) are located directly above the hacksaw blade (211).

3. The rail cutting device according to claim 2, characterized in that: The use of this rail cutting equipment includes: Step 1: The steel rail (30) is hoisted above a row of support rollers (103) by a hoisting device, and the corresponding clamping rollers (107) are driven by hydraulic cylinders (105) on both sides to clamp the rail head portion of the steel rail (30), and then the clamping rollers (107) are driven by a motor (109) through a belt drive to rotate, and the preset cutting surface of the steel rail (30) is aligned directly below the steel saw blade (211); Step 2: The two hydraulic cylinders (203) on both sides drive the steel saw blade (211) to move downward intermittently. At the same time, the two motors (215) drive the sliding tube (209) and the steel saw blade (211) to move back and forth through the crank rocker mechanism. The relative movement between the steel saw blade (211) and the steel rail (30) realizes vertical cutting and severing of the clamped steel rail (30); Step 3: When the sliding tube (209) moves to the left, since the one-way bearing is in a stuck state, the rack (222) will push the gear (220) to rotate and transmit the torque to the gear shaft (219), so that the cam (225) and the gear (220) rotate synchronously at the same angle, and the cam (225) will push the hacksaw blade (211) downward to a certain depth through the abutment bar (226). When the sliding tube (209) moves to the right, since the one-way bearing is in an active state, the rack (222) will push the gear (220) to rotate, but it cannot transmit the torque to the gear shaft (219), so that the cam (225) will remain stationary. When the top surface of the abutment bar (226) instantly returns from the push angle part of the cam (225) to the near rest angle part, the hacksaw blade (211) is subjected to an instantaneous impact force and helps to shake off the debris on the hacksaw blade (211); Step 4: When cutting the rail (30), the coolant under positive pressure is introduced into the interior of the sliding tube (209) through the liquid inlet hole (209a) via the liquid guide tube (218), and is sprayed out through the liquid outlet hole (209b) and sprayed toward the hacksaw blade (211) below, so as to cool and lubricate the hacksaw blade (211) and, at the same time, flush away debris mixed in the cutting gap. In addition, the cutting gap on the rail (30) is also cooled and lubricated; Step 5: After cutting the rail (30), the steel saw blade (211) is driven to move upward rapidly by the hydraulic cylinders 2 (203) on both sides, and then the clamping roller (107) is driven to rotate by the motor 1 (109) through the belt transmission, and the cut rail (30) is transported horizontally.

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