A bar chamfering apparatus and method

Abstract

The application discloses a kind of bar chamfering equipment, including chamfering machine and chamfering roller way, the chamfering machine includes base, bar positioning mechanism and chamfering mechanism, one end of the base is equipped with bar pressing mechanism, the chamfering mechanism includes slide, chamfering head, gearbox and chamfering motor, the slide is slidably connected with base by linear slide rail, and slide push-pull mechanism is equipped on base;The gearbox and chamfering motor are fixed on the slide, the input shaft of gearbox is connected with chamfering motor, the chamfering head is fixed on the output shaft of gearbox, and the bar positioning mechanism includes positioning rod and positioning cylinder, the cylinder is fixedly connected with the box of gearbox, one end of the positioning rod is fixedly connected with the piston rod of positioning cylinder, and the other end is connected with bar relative through output shaft and the center hole of chamfering head.The application simultaneously gives chamfering method.The application uses positioning rod to position bar on chamfering roller way again, and can greatly improve bar positioning precision and chamfering quality.

Description

Technical Field

[0001] This invention relates to a chamfering device and method for chamfering / beveling the end circumference of bars, belonging to the field of metallurgical equipment technology. Background Technology

[0002] In recent years, the domestic market demand for high-end special steel has continued to rise, and downstream users have put forward more stringent requirements for product packaging appearance, bar end quality, and surface quality. Hot-rolled bars usually need to undergo finishing processes such as straightening, chamfering, and shot blasting to improve the straightness, surface quality, and end regularity of the bars, thereby enhancing the appearance quality of product packaging and providing convenience for downstream users in processing and use.

[0003] Currently, bar end chamfering largely relies on alignment rollers and end-aligning baffles to achieve end alignment. After chamfering, the bar is lifted by a flat support and moved to the chamfering station, where the chamfering machine completes the chamfering process. However, during the movement of the bar across stations, factors such as the horizontal consistency and movement consistency of the flat support arms, equipment precision, bar straightness, vibration during the flat support process, and the inherent softness of small-diameter bars making them prone to bending and deformation during flat support can easily cause axial displacement of the bar, and the amount of displacement is not fixed. This results in the end position of the bar shifting after it reaches the chamfering station. In addition, since neither the chamfering station nor the chamfering machine has an alignment function, the end alignment effect of the bar is poor. During production, over-chamfering defects caused by excessive cutting depth of the cutter head and incomplete chamfering due to excessive distance between the chamfering cutter and the bar end, which seriously affects the overall packaging and appearance quality of the product and makes it difficult to meet the quality requirements of high-end special steel products. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a bar beveling device and method to improve the beveling quality of bars and meet the quality requirements of high-end special steel products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A bar beveling device includes a beveling machine and a beveling roller conveyor. The beveling machine includes a base, a bar positioning mechanism, and a beveling mechanism. The base is fixed to the ground at the tail end of the beveling roller conveyor. A bar pressing mechanism is provided at one end of the base near the beveling roller conveyor. The beveling mechanism includes a slide block, a beveling head, a gearbox, and a beveling motor. The slide block is slidably connected to the base via a linear slide rail parallel to the beveling roller conveyor. A slide block push-pull mechanism is provided on the base. The gearbox and the beveling motor are fixed to the slide block. The input shaft of the gearbox is connected to the beveling motor. The beveling head is fixed to the tubular output shaft of the gearbox and is opposite to the end of the bar on the beveling roller conveyor. The bar positioning mechanism includes a positioning rod and a positioning cylinder. The cylinder body of the positioning cylinder is fixedly connected to the housing or base of the gearbox. One end of the positioning rod is fixedly connected to the piston rod of the positioning cylinder, and the other end is opposite to the bar on the beveling roller conveyor through the output shaft and the center hole of the beveling head.

[0006] The above-mentioned bar chamfering equipment includes a slide push-pull mechanism comprising a servo motor, a reducer, a ball screw, and a nut. The ball screw is parallel to the linear slide rail. The servo motor and the reducer are both fixed on the base. The servo motor is connected to the ball screw via the reducer. The nut is fixed on the slide and threadedly connected to the ball screw.

[0007] The aforementioned bar beveling equipment further includes an alignment roller conveyor, a return roller conveyor, and multiple transverse movement mechanisms. The alignment roller conveyor and the return roller conveyor are arranged parallel to and symmetrically on both sides of the beveling roller conveyor. The end of the alignment roller conveyor is equipped with a baffle corresponding to the end of the bar on the alignment roller conveyor. The multiple transverse movement mechanisms are arranged along the length direction of the alignment roller conveyor, the beveling roller conveyor, and the return roller conveyor, moving the bar on the alignment roller conveyor to the beveling roller conveyor, and moving the bar on the beveling roller conveyor to the return roller conveyor.

[0008] The aforementioned bar beveling equipment includes a transverse mechanism comprising a transverse motor, a gearbox, a drive shaft, a drive gear, support arms, rotating arms, a frame, a stepping beam, driven shafts, and driven gears. The frame is fixed to the ground via a base frame, and the transverse motor and gearbox are fixed to the frame. The drive shaft and two driven shafts are parallel to the beveling roller conveyor and are rotatably connected to the frame via bearings. The two driven shafts are symmetrically arranged on both sides of the drive shaft. The transverse motor is driven by the drive shaft via the gearbox. The drive gear is fixed to the drive shaft, and the two driven gears mesh with the drive gear and are respectively fixed to the two driven shafts. The stepping beam is horizontally arranged below the alignment roller conveyor, the beveling roller conveyor, and the return roller conveyor and is perpendicular to the bar being beveling. Multiple V-shaped receiving hands matching the bar are evenly fixed to the top of the stepping beam. The upper ends of the two support arms are fixedly connected to the stepping beam, and the middle parts of the two rotating arms are respectively fixedly connected to the two driven shafts. One end of each rotating arm is rotatably connected to the lower end of the two support arms via a rotating shaft.

[0009] The above-mentioned bar beveling equipment includes a bar clamping mechanism comprising a clamping cylinder, a gantry bracket, an upper V-shaped clamping clamp, a lower V-shaped clamping clamp, and a pressure block. The bracket is fixed on a base, the clamping cylinder is vertically fixed on the top of the bracket, the pressure block is fixed to the lower end of the piston rod of the clamping cylinder, and one side of the pressure block is slidably connected to the bracket via a vertical slide. The lower V-shaped clamping clamp supports the end of the bar on the beveling roller and is fixed to the base by a support. The upper V-shaped clamping clamp is fixed to the bottom of the pressure block and is opposite to the bar on the lower V-shaped clamping clamp.

[0010] The aforementioned bar beveling equipment comprises a double-station beveling machine with two beveling heads. The gearbox of the beveling machine has two output shafts, and the two beveling heads are respectively fixed on the two output shafts. The alignment roller conveyor, beveling roller conveyor, and return roller conveyor each carry two bars, for a total of six bars, which are arranged at equal intervals. The distance between the axes of any two adjacent bars is equal to the distance between the axes of the two output shafts. The distance between the center lines of any two adjacent V-shaped receiving hands at the top of the stepping beam is equal to the distance between the axes of the two output shafts.

[0011] In the aforementioned bar beveling device, the piston rod of the positioning cylinder is connected to a coaxial displacement rod, and a stroke limit block corresponding to the cylinder body of the positioning cylinder is fixed on the displacement rod.

[0012] In the above-mentioned bar beveling equipment, a guide tube is provided between the positioning rod and the output shaft. The guide tube is coaxially fitted inside the output shaft with a gap between them. One end of the guide tube is fixedly connected to the gearbox housing through a flange, and the positioning rod is slidably inserted into the guide tube.

[0013] In the above-mentioned bar chamfering equipment, the positioning rod includes a pin and a rod. The rod is slidably inserted into the guide tube. One end of the rod is fixedly connected to the piston rod of the positioning cylinder. The pin is fixed to the other end of the rod and is opposite to the end of the bar on the chamfering roller table through the center hole of the chamfering head.

[0014] A method for beveling bar stock, the method comprising the following steps: a. Equipment initialization: Start the servo motor, which drives the slide block to slide along the linear slide rail via the reducer, ball screw, and nut, moving the chamfering head away from the chamfering roller track to the initial position; start the positioning cylinder to move the positioning rod closer to the chamfering roller track to the set position; start the clamping cylinder to lift the upper V-clamp; start the transverse motor to adjust the stepping beam to the lowest position; b. The bar stock that needs to be chamfered is conveyed to the side of the chamfering roller conveyor by the alignment roller conveyor, and the chamfering end face of the bar stock is initially positioned by the blocking of the end baffle. c. Start the transverse motor. The transverse motor drives the rotating arm to rotate one revolution in sequence through the gearbox, drive shaft, drive gear, driven gear, and driven shaft. The two rotating arms drive the stepping beam to rotate through the rotating shaft and support arm. The V-shaped material receiving hand on the stepping beam rotates accordingly, lifting the bar on the alignment roller and placing it on the chamfered roller and the lower V-shaped clamping clamp. d. Start the chamfering roller conveyor to move the bar towards the positioning rod. After the bar hits the positioning rod, the chamfering roller conveyor stops running. At the same time, the subsequent bars that need to be chamfered are conveyed to the side of the chamfering roller conveyor by the alignment roller conveyor. The chamfering end face of the subsequent bars is initially positioned by the blocking of the bar by the end-aligning baffle. e. Start the clamping cylinder to drive the pressure block to move downward, so that the upper V-clamp clamps clamp the bar on the lower V-clamp clamps. Then start the positioning cylinder to move the positioning rod away from the bar. f. Start the servo motor. The servo motor drives the slide block to slide along the linear slide rail through the reducer, ball screw and nut, so that the chamfering head moves towards the bar. At the same time, start the chamfering motor. The chamfering motor drives the chamfering head to rotate through the gearbox. After the chamfering head contacts the bar, it chamfers the end of the bar. The chamfering motor stops running after the running time reaches the set value. g. Start the servo motor to move the chamfering head back to the initial position. At the same time, start the clamping cylinder to lift the upper V-clamp and release the chamfered bar. Then start the transverse motor to drive the rotating arm to rotate one revolution. The stepping beam transfers the chamfered bar to the return roller conveyor for transport. At the same time, it transfers the subsequent bars on the alignment roller conveyor to the chamfering roller conveyor and the lower V-clamp. h. Repeat steps d to g to bevele the subsequent bars.

[0015] This invention incorporates a bar positioning mechanism coaxial with the chamfering head on the chamfering machine. This mechanism utilizes a positioning rod driven by a positioning cylinder to perform secondary positioning of the bars on the chamfering roller conveyor. This significantly improves the bar positioning accuracy and chamfering quality without affecting the normal operation of the chamfering machine, thus meeting the quality requirements of high-end special steel products. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the bar beveling device in this invention; Figure 2 This is a structural diagram of a beveling machine; Figure 3 This is a schematic diagram of the bar clamping mechanism; Figure 4 This is a schematic diagram of the internal structure of the chamfered head, output shaft, and gearbox; Figure 5This is a structural diagram of the positioning rod; Figure 6 This is a schematic diagram of the transverse movement mechanism; Figure 7 yes Figure 6 A schematic diagram of the rear structure; Figure 8 yes Figure 6 AA section view; Figure 9 This is a schematic diagram illustrating the process by which the transverse transfer mechanism moves the bar stock from the alignment roller conveyor to the chamfering roller conveyor. Figure 9 (a) shows the state of the bar stock on the alignment rollers. Figure 9 (b) shows the state when the walking beam supports the bar. Figure 9 (c) shows the state when the walking beam moves the bar towards the chamfering roller conveyor. Figure 9 (d) is the state when the walking beam places the bar onto the chamfering roller conveyor. Figure 9 (e) is the state when the walking beam is rotated back to the lowest position.

[0018] The following are the labels in the diagram: 1. Ejector pin, 2. Ejector rod, 3. Chamfering machine, 4. Positioning cylinder, 5. Stroke limit block, 6. Displacement rod, 7. Rear air intake pipe, 8. Front air intake pipe, 9. Drive mechanism, 10. Inner chamfering blade, 11. Guide tube, 12. Outer chamfering blade, 13. Chamfering head, 14. Output shaft, 15. Transmission gear, 16. Gearbox, 17. Drive gear, 18. Input shaft, 19. Chamfering motor, 20. Clamping cylinder, 21. Base, 22. Linear slide rail, 23. Bracket, 24. Upper V-clamp, 25. Lower V-clamp, 26. 27. Bar stock, 28. Press block, 29. Vertical slide rail, 30. Head-aligning baffle, 31. Horizontal movement mechanism, 32. Horizontal movement motor, 33. Gearbox, 34. Drive shaft, 35. Drive gear, 36. Alignment roller conveyor, 37. Roller conveyor support, 38. V-shaped receiving arm, 39. Support arm, 40. Rotating arm, 41. Rotating shaft, 42. Frame, 43. Stepping beam, 44. Driven shaft, 45. Driven gear, 46. Servo motor, 47. Gear reducer, 48. Ball screw, 49. Beveled roller conveyor, 50. Return roller conveyor, 51. Nut, 52. Slide block. Detailed Implementation

[0019] This invention provides a bar beveling device and method, which can improve the beveling accuracy of bars, enhance the overall packaging molding and appearance quality of products, and solve the problems existing in the background art.

[0020] See Figure 1The bar beveling device of the present invention mainly includes a beveling machine 3, an alignment roller conveyor 35, a beveling roller conveyor 49, a return roller conveyor 50, a head-trimming baffle 29, and a transverse movement mechanism 30. The alignment roller conveyor 35, the beveling roller conveyor 49, and the return roller conveyor 50 are arranged parallel to each other and at equal intervals. Each of them is equipped with a drive mechanism 9 for driving the bar 26 to move axially. The alignment roller conveyor 35, the beveling roller conveyor 49, and the return roller conveyor 50 are supported and fixed by roller conveyor support seats 36. The head-trimming baffle 29 is installed at the end of the alignment roller conveyor 35 to block the bar 26 conveyed by the alignment roller conveyor 35 and to initially position the beveling end of the bar 26. The beveling machine 3 and the beveling roller conveyor 49 are connected in parallel and at equal intervals. The ends of the chamfering rollers 49 are opposite each other and are used to position and chamfer the bars 26 on the chamfering rollers 49. The chamfering machine 3 is equipped with a bar positioning device, which can cooperate with the chamfering rollers 49 to achieve precise positioning of the bars. Multiple transverse mechanisms 30 are provided, which are arranged along the length direction of the alignment rollers 35, the chamfering rollers 49 and the return rollers 50. Multiple transverse mechanisms 30 operate synchronously to move the bars 26 that have been initially positioned on the alignment rollers 35 to the chamfering rollers 49, and at the same time move the chamfered bars 26 on the chamfering rollers 49 to the return rollers 50. The return rollers 50 are used to send the chamfered bars 26 to the next process.

[0021] See Figure 2 The chamfering machine 3 includes a base 21, a bar positioning mechanism, a bar clamping mechanism, and a chamfering mechanism. The bar positioning mechanism works in conjunction with the chamfering roller conveyor 49 to achieve precise positioning of the bar. The bar clamping mechanism is used to clamp and fix the precisely positioned bar to prevent it from moving during the chamfering process and improve the chamfering accuracy. The chamfering mechanism is used to chamfer the bar 26.

[0022] See Figure 2 and Figure 3 The bar clamping mechanism includes a clamping cylinder 20, a bracket 23, an upper V-shaped clamping clamp 24, a lower V-shaped clamping clamp 25, a pressure block 27, and a vertical slide 28. The gantry bracket 23 is fixed on the base 21. The clamping cylinder 20 is vertically fixed on the top of the bracket 23. The pressure block 27 is fixed to the lower end of the piston rod of the clamping cylinder 20 and can move up and down under the drive of the clamping cylinder 20. One side of the pressure block 27 is slidably connected to the bracket 23 through the vertical slide 28 to improve the stability of the movement of the pressure block 27. The lower V-shaped clamping clamp 25 supports the end of the bar on the chamfered roller track 49 and is fixed on the base 21 by a support. The upper V-shaped clamping clamp 24 is fixed to the bottom of the pressure block 27 and is opposite to the bar on the lower V-shaped clamping clamp 25. After the upper V-shaped clamping clamp 24 moves downward, it can clamp the bar on the lower V-shaped clamping clamp 25.

[0023] See Figure 2 and Figure 4The chamfering mechanism includes a slide block 52, a chamfering head 13, a gearbox 16, a chamfering motor 19, a servo motor 46, a reducer 47, a ball screw 48, and a nut 51. The slide block 52 is slidably connected to the base 21 via a linear slide rail 22 parallel to the chamfering roller conveyor 49, and can slide along the linear slide rail 22 under external force. The gearbox 16 and the chamfering motor 19 are fixed on the slide block 52. The input shaft 18 of the gearbox 16 is connected to the chamfering motor 19, and the chamfering head 13 is fixed on the output shaft 14 of the gearbox 16 and is opposite to the end of the bar on the chamfering roller conveyor 49. When the slide block 52 slides along the linear slide rail 22, the chamfering head 13 slides accordingly, thereby approaching or moving away from the bar 26. The servo motor 46 and the reducer 47 are both fixed on the base 21. The ball screw 48 is parallel to the linear slide rail 22. The servo motor 46 is connected to the ball screw 48 through the reducer 47. The nut 51 is fixed on the slide 52 and threadedly connected to the ball screw 48. When the servo motor 46 drives the ball screw 48 to rotate through the reducer 47, the nut 51 moves along the axial direction of the ball screw 48, thereby driving the slide 52 to slide along the linear slide rail 22. The chamfered head 13 moves synchronously with the slide 52, which can make the chamfered head 13 move backward from the chamfering position to the non-working position, or move forward from the non-working position to the chamfering position.

[0024] When the chamfering mechanism of the present invention is running, the chamfering motor 19 drives the drive gear 17 to rotate through the input shaft 18 inside the gearbox 16, which in turn drives the transmission gear 15 meshing with the drive gear 17 to rotate. The transmission gear 15 drives the output shaft 14 fixedly connected to it to rotate, thereby driving the chamfering head 13 to rotate and chamfer the end of the bar.

[0025] The chamfering machine is a double-station chamfering machine with two chamfering heads 13. Its gearbox 16 is equipped with a drive gear 17, an input shaft 18, two output shafts 14 and two transmission gears 15. The input shaft 18 and the two output shafts 14 are rotatably connected to the housing of the gearbox 16 through bearings. The drive gear 17 is fixed on the input shaft 18 and the input shaft 18 is connected to the chamfering motor 19. The two transmission gears 15 mesh with the drive gear 17 and are fixedly connected to the two output shafts 14 respectively. The two chamfering heads 13 are fixed on the two output shafts 14 respectively. The alignment roller 35, the chamfering roller 49 and the return roller 50 can all carry two bars to improve processing efficiency.

[0026] See also Figure 2 and Figure 4The bar positioning mechanism includes a guide tube 11, a positioning rod, and a positioning cylinder 4. The output shaft 14 of the gearbox 16 is a hollow tubular shaft. The guide tube 11 is coaxially fitted inside the output shaft 14 with a gap between them. One end of the guide tube 11 is fixedly connected to the housing of the gearbox 16 through a flange. The cylinder body of the positioning cylinder 4 is fixedly connected to the housing or base 21 of the gearbox 16. The positioning rod is slidably inserted into the guide tube 11. One end of the positioning rod is fixedly connected to the piston rod of the positioning cylinder 4, and the other end is opposite to the end of the bar on the chamfered roller table 49 through the center hole of the chamfered head 13. The piston rod of the positioning cylinder 4 is connected to a coaxial displacement rod 6 (the piston rod and displacement rod 6 can be a single unit, or the displacement rod 6 can be considered part of the piston rod). A stroke limiting block 5, corresponding to the cylinder body of the positioning cylinder 4, is fixed on the displacement rod 6. The two chambers of the positioning cylinder 4 are connected to an air source via a rear air intake pipe 7 and a front air intake pipe 8, respectively. The extension (protrusion) and retraction (retraction) of the piston rod are achieved by controlling the flow direction of compressed air. The stroke limiting block 5 is used to limit the displacement of the positioning rod. When the stroke limiting block 5 contacts the cylinder body of the positioning cylinder 4, the positioning rod reaches the set position, thus positioning the end of the rod.

[0027] By changing the position of the stroke limit block 5 on the displacement rod 6, the piston rod stroke of the positioning cylinder 4 can be adjusted to meet the positioning requirements of bars of different specifications.

[0028] The chamfering head 13 is annular and is coaxially connected to the output shaft 14 of the gearbox 16 by bolts. On the side of the chamfering head 13 opposite to the bar on the chamfering roller 49, there are inner chamfering blades 10 and outer chamfering blades 12 evenly distributed around its axis. When the diameter of the bar to be chamfered is small, the inner chamfering blade 10 is used for chamfering. When the diameter of the bar to be chamfered is large, the inner chamfering blade 10 is removed and the outer chamfering blade 12 is used for chamfering.

[0029] See Figure 5 The positioning rod includes a pin 1 and a rod 2. The rod 2 is slidably inserted into the guide tube 11. One end of the rod 2 is fixedly connected to the piston rod of the positioning cylinder 4. The pin 1 is fixed to the other end of the rod 2 and is aligned with the end of the bar on the chamfered roller conveyor 49 through the center hole of the chamfered head 13. The rod 2 and the pin 1 are connected by threads, as are the rod 2 and the piston rod of the positioning cylinder 4.

[0030] The ejector pin 1 is a consumable part, designed with a detachable, split connection for easy maintenance and quick replacement; the ejector rod 2 is threadedly connected to the piston rod of the positioning cylinder 4 for easy replacement; the ejector pin 1 is made of bearing steel, possessing extremely high mechanical strength, hardness, and wear resistance, extending its service life. The ejector rod 2 is made of ordinary material, reducing equipment investment and operating costs without affecting performance.

[0031] Positioning rod dimensions: The length of the top rod 2 is approximately 610mm, and the diameter is approximately 25mm. The length of the top pin 1 is approximately 55mm. The diameter of the thin rod at the tip of the top pin 1 is approximately 8mm, and the screw thread at the other end is screwed in for approximately 20mm. The specific lengths and dimensions can be adjusted and optimized according to the actual dimensions of the matching chamfering machine.

[0032] See Figures 6 to 8 The transverse movement mechanism 30 includes a transverse movement motor 31, a reduction gearbox 32, a drive shaft 33, a drive gear 34, a V-shaped receiving hand 37, a support arm 38, a rotating arm 39, a rotating shaft 40, a frame 41, a base frame 42, a stepping beam 43, a driven shaft 44, and a driven gear 45. The frame 41 is fixed to the ground via the base frame 42, and the transverse movement motor 31 and the reduction gearbox 32 are fixed to the frame 41. The drive shaft 33 and two driven shafts 44 are parallel to the chamfered roller conveyor 49 and are rotatably connected to the frame 41 via bearings. The two driven shafts 44 are symmetrically arranged on both sides of the drive shaft 33. The transverse movement motor 31 is connected to the drive shaft 33 via the reduction gearbox 32. The drive gear 34 is fixed to the drive shaft 33, and the two driven gears 45 mesh with the drive gear 34 and are respectively fixed to the two driven shafts 44. The stepping beam 43 is horizontally arranged below the alignment roller conveyor 35, the chamfering roller conveyor 49, and the return roller conveyor 50, and is perpendicular to the chamfered bar 26. Multiple V-shaped receiving handles 37, matching the bar 26, are evenly fixed to the top of the stepping beam 43. The upper ends of two support arms 38 are fixedly connected to the stepping beam 43, and the middle parts of two rotating arms 39 are fixedly connected to two driven shafts 44 respectively. One end of each rotating arm 39 is rotatably connected to the lower end of the two support arms 38 via a rotating shaft 40. The other end of each rotating arm 39 is provided with an integrally formed semi-circular counterweight to improve the stability of rotation.

[0033] As shown in the figure, this equipment adopts a dual-station chamfering machine, which can chamfer two bars simultaneously. The alignment roller 35, chamfering roller 49, and return roller 50 can each carry two bars. A total of six bars are placed on the three rollers, and the six bars are arranged at equal intervals. The distance between the axes of any two adjacent bars is equal to the distance between the axes of the two output shafts 14. At least four V-shaped receiving hands 37 are fixed on each stepping beam 43 (extra V-shaped receiving hands 37 are idle). In this embodiment, each stepping beam 43 is provided with 10 V-shaped receiving hands 37. The distance between the center lines of any two adjacent V-shaped receiving hands 37 is equal to the distance between the axes of the two output shafts 14. The driving gear 34 simultaneously drives the two driven gears 45 located on its left and right sides to rotate synchronously and in the same direction (clockwise or counterclockwise), ensuring that the two rotating arms 39 on the left and right sides rotate synchronously and drive the two support arms 38 and the stepping beam 43 to move synchronously horizontally and vertically, so that the stepping beam 43 and the V-shaped receiving hand 37 are always in a horizontal state and can operate stably. When the transverse mechanism 30 stops working, the stepping beam 43 is in the lowest position. Each rotation of the rotating arm 39 can lift all the bars on the alignment roller conveyor 35 and move them horizontally by two bars before placing them on the chamfered roller conveyor 49. At the same time, it can lift all the bars on the chamfered roller conveyor 49 and move them horizontally by two bars before placing them on the return roller conveyor 50. The process of the transverse mechanism moving the bars from the alignment roller conveyor to the chamfered roller conveyor is as follows: Figure 9 As shown.

[0034] The working process of this bar beveling equipment is as follows: a. Equipment initialization: Start the servo motor 46. The servo motor 46 drives the slide block 52 to slide along the linear slide rail 22 through the reducer 47, ball screw 48 and nut 51, moving the chamfered head 13 away from the chamfered roller track 49 to the initial position; start the positioning cylinder 4 to move the positioning rod closer to the chamfered roller track 49 to the set position. At this time, the ejector pin 1 is in the protruding position (i.e., the aligned position, the ejector pin 1 protrudes from the chamfered head 13); start the clamping cylinder 20 to lift the upper V-shaped clamping clamp 24; start the transverse motor 31 to adjust the stepping beam 43 to the lowest position; b. A group of bars 26 that need to be chamfered are conveyed from the alignment roller conveyor 35 to the side of the chamfering roller conveyor 49, and the chamfering end face of the bars 26 is initially positioned by the blocking of the end baffle 29. c. Start the transverse motor 31. The transverse motor 31 drives the rotating arm 39 to rotate one revolution through the reduction gearbox 32, drive shaft 33, drive gear 34, driven gear 45, and driven shaft 44 in sequence. The two rotating arms 39 drive the stepping beam 43 to rotate through the rotating shaft 40 and support arm 38. The V-shaped receiving hand 37 on the stepping beam 43 rotates accordingly, lifting the bar 26 on the alignment roller conveyor 35 and placing it on the chamfering roller conveyor 49. At the same time, the bar 26 is also placed on the lower V-shaped clamping clamp 25. During this process, due to the positioning deviation of the alignment roller conveyor 35, the vibration of the stepping beam 43, and the bending of the bar, the position of the chamfered end of the bar will be axially offset (the offset is about 4 to 8 mm). d. After the controller of the chamfering machine detects steel on the chamfering roller conveyor 49 through the proximity switch, it starts the chamfering roller conveyor 49, causing the bar to move towards the positioning rod. After the bar hits the ejector pin 1 of the positioning rod, the chamfering roller conveyor 49 stops running. At this time, the bar is in contact with the ejector pin 1, achieving precise positioning of the chamfered end of the bar. At the same time, the next set of bars 26 that need to be chamfered is conveyed to the side of the chamfering roller conveyor 49 by the alignment roller conveyor 35. The chamfered end face of the next set of bars 26 is initially positioned by the blocking of the bar 26 by the end-aligning baffle 29. e. Start the clamping cylinder 20 to drive the pressure block 27 to move downward, so that the upper V-clamp 24 clamps the bar on the lower V-clamp 25. Then start the positioning cylinder 4 to retract the positioning rod (move it away from the bar). f. Start the servo motor 46. The servo motor 46 drives the slide block 52 to slide along the linear slide rail 22 through the reducer 47, ball screw 48 and nut 51, so that the chamfering head 13 moves towards the bar. At the same time, start the chamfering motor 19. The chamfering motor 19 drives the chamfering head 13 to rotate through the gearbox 16. After the chamfering head 13 contacts the bar, it chamfers the end of the bar. The chamfering motor 19 stops running after the running time reaches the set value. g. Start the servo motor 46 to make the chamfering head 13 retract to the initial position. At the same time, start the clamping cylinder 20 to lift the upper V-clamp 24 and release the chamfered bar. Then start the transverse motor 31 to drive the rotating arm 39 to rotate one revolution. The stepping beam 43 transfers the chamfered bar to the return roller 50 and carries it away. At the same time, it transfers the subsequent set of bars 26 on the alignment roller 35 to the chamfering roller 49 and the lower V-clamp 25. h. Repeat steps d to g to bevele the subsequent bars.

[0035] The beneficial effects of this invention are: This invention incorporates a bar positioning mechanism coaxial with the chamfering head on the chamfering machine. This mechanism utilizes a positioning rod driven by a positioning cylinder to perform secondary positioning of the bars on the chamfering roller conveyor. This significantly improves the bar positioning accuracy and chamfering quality without affecting the normal operation of the chamfering machine, thus meeting the quality requirements of high-end special steel products.

[0036] The ejector pin's movement can be linked with the chamfering roller conveyor, and through electrical interlock control, the ejector pin's extension and retraction actions are stable and reliable, requiring no frequent manual operation or intervention. The ejector pin is driven by a positioning cylinder, resulting in fast, efficient, and low-cost operation, with less contamination compared to hydraulic cylinders. This invention significantly improves the chamfering quality and consistency, enhancing the product's appearance.

[0037] Compared to the traditional method of aligning the ends by simply aligning the rollers, the end positioning accuracy and stability are greatly improved, and the chamfer compliance rate is increased from the initial 51% to 97%. For bars with good straightness, which are sawed off during rolling and have good end quality, the chamfer compliance rate can reach 99.3%, and the chamfer stability and uniformity are significantly improved.

Claims

1. A bar beveling device, characterized in that, The system includes a chamfering machine (3) and a chamfering roller conveyor (49). The chamfering machine (3) includes a base (21), a bar positioning mechanism, and a chamfering mechanism. The base (21) is fixed on the ground at the end of the chamfering roller conveyor (49). A bar pressing mechanism is provided at one end of the base (21) near the chamfering roller conveyor (49). The chamfering mechanism includes a slide (52), a chamfering head (13), a gearbox (16), and a chamfering motor (19). The slide (52) is slidably connected to the base (21) via a linear slide rail (22) parallel to the chamfering roller conveyor (49). A slide push-pull mechanism is provided on the base (21). The gearbox (16) and the chamfering motor... The machine (19) is fixed on the slide (52), the input shaft (18) of the gearbox (16) is connected to the chamfering motor (19), the chamfering head (13) is fixed on the tubular output shaft (14) of the gearbox (16) and is opposite to the end of the bar on the chamfering roller table (49), the bar positioning mechanism includes a positioning rod and a positioning cylinder (4), the cylinder body of the positioning cylinder (4) is fixedly connected to the housing or base (21) of the gearbox (16), one end of the positioning rod is fixedly connected to the piston rod of the positioning cylinder (4), and the other end is opposite to the bar on the chamfering roller table (49) through the center hole of the output shaft (14) and the chamfering head (13).

2. The bar beveling device according to claim 1, characterized in that, The slide push-pull mechanism includes a servo motor (46), a reducer (47), a ball screw (48), and a nut (51). The ball screw (48) is parallel to the linear slide rail (22). The servo motor (46) and the reducer (47) are both fixed on the base (21). The servo motor (46) is connected to the ball screw (48) through the reducer (47). The nut (51) is fixed on the slide (52) and threadedly connected to the ball screw (48).

3. The bar beveling device according to claim 2, characterized in that, It also includes an alignment roller conveyor (35), a return roller conveyor (50), and multiple transverse mechanisms (30). The alignment roller conveyor (35) and the return roller conveyor (50) are arranged parallel to and symmetrically on both sides of the chamfered roller conveyor (49). The end of the alignment roller conveyor (35) is equipped with a baffle (29) corresponding to the end of the bar (26) on the alignment roller conveyor (35). Multiple transverse mechanisms (30) are arranged along the length direction of the alignment roller conveyor (35), the chamfered roller conveyor (49), and the return roller conveyor (50) to move the bar (26) on the alignment roller conveyor (35) to the chamfered roller conveyor (49) and the bar (26) on the chamfered roller conveyor (49) to the return roller conveyor (50).

4. The bar beveling device according to claim 3, characterized in that, The transverse mechanism (30) includes a transverse motor (31), a reduction gearbox (32), a drive shaft (33), a drive gear (34), a support arm (38), a rotating arm (39), a frame (41), a stepping beam (43), a driven shaft (44), and a driven gear (45). The frame (41) is fixed to the ground by a base frame (42), and the transverse motor (31) and the reduction gearbox (32) are fixed to the frame (41). The drive shaft (33) and two driven shafts (44) are parallel to the chamfered roller conveyor (49) and are rotatably connected to the frame (41) by bearings. The two driven shafts (44) are symmetrically arranged on both sides of the drive shaft (33). The transverse motor (31) is connected to the drive shaft (33) through the reduction gearbox (32). The driving gear (34) is fixed on the driving shaft (33), and the two driven gears (45) mesh with the driving gear (34) and are respectively fixed on the two driven shafts (44); the stepping beam (43) is horizontally arranged below the alignment roller (35), the chamfering roller (49) and the return roller (50) and is perpendicular to the chamfered bar (26). The top of the stepping beam (43) is uniformly fixed with a number of V-shaped receiving hands (37) that match the bar (26). The upper ends of the two support arms (38) are fixedly connected to the stepping beam (43), the middle parts of the two rotating arms (39) are fixedly connected to the two driven shafts (44) respectively, and one end of the two rotating arms (39) is rotatably connected to the lower end of the two support arms (38) respectively through the rotating shaft (40).

5. A bar beveling device according to claim 4, characterized in that, The bar clamping mechanism includes a clamping cylinder (20), a portal frame (23), an upper V-shaped clamp (24), a lower V-shaped clamp (25), and a pressure block (27). The frame (23) is fixed on the base (21). The clamping cylinder (20) is vertically fixed on the top of the frame (23). The pressure block (27) is fixed on the lower end of the piston rod of the clamping cylinder (20). One side of the pressure block (27) is slidably connected to the frame (23) through a vertical slide (28). The lower V-shaped clamp (25) supports the end of the bar on the chamfered roller track (49) and is fixed on the base (21) by a support. The upper V-shaped clamp (24) is fixed on the bottom of the pressure block (27) and is opposite to the bar on the lower V-shaped clamp (25).

6. A bar beveling device according to claim 5, characterized in that, The chamfering machine is a double-station chamfering machine with two chamfering heads (13). The gearbox (16) of the chamfering machine has two output shafts (14). The two chamfering heads (13) are fixed on the two output shafts (14) respectively. The alignment roller (35), chamfering roller (49) and return roller (50) each carry two bars. The three rollers carry a total of six bars and the six bars are arranged at equal intervals. The distance between the axes of any two adjacent bars is equal to the distance between the axes of the two output shafts (14). The distance between the center lines of any two adjacent V-shaped receiving hands (37) at the top of the stepping beam (43) is equal to the distance between the axes of the two output shafts (14).

7. A bar beveling device according to claim 6, characterized in that, The piston rod of the positioning cylinder (4) is connected to a coaxial displacement rod (6), and a stroke limit block (5) corresponding to the cylinder body of the positioning cylinder (4) is fixed on the displacement rod (6).

8. A bar beveling device according to claim 7, characterized in that, A guide tube (11) is provided between the positioning rod and the output shaft (14). The guide tube (11) is coaxially fitted inside the output shaft (14) with a gap between them. One end of the guide tube (11) is fixedly connected to the gearbox (16) housing through a flange. The positioning rod is slidably inserted into the guide tube (11).

9. A bar beveling device according to claim 8, characterized in that, The positioning rod includes a pin (1) and a rod (2). The rod (2) is slidably inserted into the guide tube (11). One end of the rod (2) is fixedly connected to the piston rod of the positioning cylinder (4). The pin (1) is fixed to the other end of the rod (2) and is opposite to the end of the bar on the chamfered roller (49) through the center hole of the chamfered head (13).

10. A method for beveling a bar using the equipment described in any one of claims 5 to 9, the method comprising the following steps: a. Equipment initialization: Start the servo motor (46), which drives the slide block (52) to slide along the linear slide rail (22) through the reducer (47), ball screw (48) and nut (51), moving the chamfered head (13) away from the chamfered roller track (49) to the initial position; start the positioning cylinder (4) to move the positioning rod closer to the chamfered roller track (49) to the set position; start the clamping cylinder (20) to lift the upper V-shaped clamp (24); Start the transverse motor (31) and adjust the stepper beam (43) to the lowest position; b. The bar (26) that needs to be chamfered is conveyed from the alignment roller (35) to the side of the chamfering roller (49), and the chamfering end face of the bar (26) is initially positioned by the blocking of the bar (26) by the end baffle (29); c. Start the transverse motor (31). The transverse motor (31) drives the rotating arm (39) to rotate one revolution through the gearbox (32), drive shaft (33), drive gear (34), driven gear (45), and driven shaft (44) in sequence. The two rotating arms (39) drive the stepping beam (43) to rotate through the rotating shaft (40) and support arm (38). The V-shaped receiving hand (37) on the stepping beam (43) rotates accordingly, lifting the bar (26) on the alignment roller (35) and placing it on the chamfered roller (49) and the lower V-shaped clamping clamp (25). d. Start the chamfering roller conveyor (49) to move the bar towards the positioning rod. After the bar hits the positioning rod, the chamfering roller conveyor (49) stops running. At the same time, the subsequent bar (26) that needs to be chamfered is conveyed to the side of the chamfering roller conveyor (49) by the alignment roller conveyor (35). The chamfering end face of the subsequent bar (26) is initially positioned by the blocking of the bar (26) by the end-aligning baffle (29). e. Start the clamping cylinder (20) to drive the pressure block (27) to move downward, so that the upper V-type clamp (24) clamps the bar on the lower V-type clamp (25), and then start the positioning cylinder (4) to move the positioning rod away from the bar; f. Start the servo motor (46). The servo motor (46) drives the slide block (52) to slide along the linear slide rail (22) through the reducer (47), ball screw (48) and nut (51), so that the chamfer head (13) moves towards the bar. At the same time, start the chamfer motor (19). The chamfer motor (19) drives the chamfer head (13) to rotate through the gearbox (16). After the chamfer head (13) contacts the bar, it chamfers the end of the bar. The chamfer motor (19) stops running after the running time reaches the set value. g. Start the servo motor (46) to make the chamfering head (13) retract to the initial position, and at the same time start the clamping cylinder (20) to lift the upper V-shaped clamp (24) and release the chamfered bar. Then start the transverse motor (31) to drive the rotating arm (39) to rotate one revolution. The stepping beam (43) transfers the chamfered bar to the return roller conveyor (50) and carries it away. At the same time, the subsequent bar (26) on the alignment roller conveyor (35) is transferred to the chamfering roller conveyor (49) and the lower V-shaped clamp (25). h. Repeat steps d to g to bevele the subsequent bars.

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