A centerless grinding device for metal bars

Abstract

The present application relates to the technical field of bar grinding, and discloses a metal bar centerless grinding device, wherein the inclined supporting surface of the supporting plate is arranged in the same plane with the inclined part of the butt joint plate, so that the bar always adheres to the side surface of the guide wheel under the action of gravity, and the guide wheel stably drives the bar to rotate and axially feed from the inlet to the outlet; the bar is actively sent in and out at the synchronous speed in cooperation with the guide mechanisms on both sides, so that the traditional phenomenon of "staying at the inlet and trailing at the outlet" is completely eliminated, the two ends are avoided from being excessively ground, and the drum-shaped error of "small at both ends and large in the middle" is eradicated, thereby ensuring the diameter consistency and straightness of the whole bar. The present application solves the problem that the conventional centerless grinding device is difficult to maintain stable axial feeding when the bar enters and exits the guide wheel area at the head and tail, which leads to excessive grinding of the two ends and the drum-shaped error of "small at both ends and large in the middle", and causes the safety hidden trouble of the diameter consistency and straightness of the bar surface.

Description

Technical Field

[0001] This invention relates to the field of bar grinding technology, specifically to a centerless grinding device for metal bars. Background Technology

[0002] Centerless grinding equipment is specially designed for precision machining of the outer diameter of slender metal bars (steel, titanium, copper, etc.). Its "centerless" feature is that the workpiece does not require a center or chuck, and is positioned and driven by the grinding wheel, guide wheel (adjusting wheel) and support plate working together.

[0003] The guide wheel axis is deflected at a small angle relative to the grinding wheel in the horizontal plane, so that the bar and the guide wheel form a small contact angle; the rotating guide wheel uses this friction to drive the bar to pass through the grinding zone at a uniform speed along the axis, realizing continuous feed.

[0004] However, in the transition zone between the "entry" and "exit" ends of the bar stock, the wrap angle between the guide wheel and the workpiece decreases sharply, the effective contact length and normal pressure decrease simultaneously, and the driving torque decreases sharply as a result. At this time, the grinding wheel is still grinding at full power, while the axial feed is almost stagnant, resulting in excessive material removal at both ends. When the bar stock fully enters the stable zone, the feed returns to normal, the amount of material removed decreases, and finally a drum-shaped error of "thin at both ends and thick in the middle" is formed, which directly damages the surface diameter consistency and straightness. Summary of the Invention

[0005] The purpose of this invention is to provide a centerless grinding device for metal bars, which solves the problem that conventional centerless grinding devices have difficulty maintaining stable axial feed when the bar enters and exits the guide wheel area at both ends, resulting in excessive grinding at both ends and a "small at both ends and large in the middle" drum-shaped error, which poses a safety hazard to the consistency of the bar surface diameter and straightness.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a centerless grinding apparatus for metal bars, comprising: The guide wheel and the grinding wheel are provided with a support plate between them. The guide wheel is deflected at a preset angle relative to the grinding wheel in the horizontal plane, and the bar tends to contact the side of the guide wheel under the guidance of the support plate. The guiding mechanism is located on both sides of the pallet. The guiding mechanism includes an assembly base mounted on one end of the pallet. A pair of docking plates are mounted on the upper side of the assembly base via a support block. A rotatable transmission wheel is provided on the upper side of the docking plate. A drive assembly for driving the transmission wheel to rotate is provided on one side of the docking plate. A pair of docking plates and pallets are docked. The bar is pushed by the conveyor wheel and enters the working area between the guide wheel and the pallet from one side of the guide wheel and is ground by the grinding wheel. Then the ground bar is output from the other side of the guide wheel and the pallet and is actively received and exported by another guiding mechanism.

[0007] As a further description of the above technical solution: the upper side of the pallet is provided with an inclined support surface, and the surface of the support surface is biased towards one side of the guide wheel; The upper side of the docking plate is provided with an inclined part, the inclination angle of which is the same as that of the support surface. The inclined part of one docking plate is on the same plane as the support surface, and the setting position of the other docking plate is such that the rods supported by the upper side of the pair of docking plates are coaxial with the rods in the middle of the guide wheel and the support plate.

[0008] As a further description of the above technical solution: multiple conveyor wheels are provided, and all of the multiple conveyor wheels are obliquely assembled on the upper side of the docking plate.

[0009] As a further description of the above technical solution: the arc surface of the conveyor wheel is covered with a rubber material covering layer.

[0010] As a further description of the above technical solution: the driving component includes a rubber ring, which is supported on the underside of the transmission wheel by support wheels on both sides. The upper surface of the rubber ring is in frictional contact with the lower surface of the transmission wheel. A motor for driving the support wheel to rotate is also provided on the underside of one of the support wheels.

[0011] As a further description of the above technical solution: multiple pushing rollers are also provided on the inner side of the rubber ring. The multiple pushing rollers are staggered with the multiple conveying rollers. The multiple pushing rollers squeeze the rubber ring towards the conveying rollers, so that the rubber ring and the multiple conveying rollers come into frictional contact.

[0012] As a further description of the above technical solution: a clamping component is also provided on one side of the docking plate, and the clamping component presses the bar material downward.

[0013] As a further description of the above technical solution: the pressing assembly includes a pressure roller, a support shaft is rotatably arranged inside the pressure roller, a support frame is connected to one side of the support shaft, a connecting seat is hinged at the lower end of the support frame, the connecting seat is fixedly assembled on one side of the docking plate, and a torsion spring is provided on the hinge shaft between the support frame and the connecting seat, the torsion spring elastically drives the support frame to rotate downward.

[0014] As a further description of the above technical solution: the surface of the support block is provided with through holes; A screw is fixedly connected to one side of the docking plate. The screw is movably inserted into the inside of the through hole. The surface of the screw is also provided with a nut to fix the position of the screw on the support block.

[0015] As a further description of the above technical solution: both sides of the pallet are provided with mounting parts that protrude from both sides of the guide wheel; An adjustment groove is provided on the lower side of the assembly base, and the adjustment groove is movably fitted with the assembly part. A threaded connecting bolt is also provided on one side of the assembly base. By rotating the bolt, the assembly base is fixedly assembled on the upper side of the assembly part.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting the inclined support surface of the support plate and the inclined part of the docking plate to be coplanar, the bar is always in contact with the side of the guide wheel under the action of gravity, ensuring that the guide wheel stably drives the bar to rotate and feed axially from the inlet to the outlet. With the help of the guide mechanisms on both sides, the bar is actively fed in and out at the same speed, completely eliminating the traditional phenomenon of "entry end retention and exit end dragging", avoiding excessive grinding at both ends, thus eliminating the "small at both ends and large in the middle" drum-shaped error, and ensuring the consistency of the diameter and straightness of the entire bar. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tray and guide mechanism structure of the present invention; Figure 3 This is a schematic diagram of the guiding mechanism structure of the present invention; Figure 4 This is a schematic diagram of the assembly base of the present invention; Figure 5 This is a schematic diagram of the docking plate structure of the present invention; Figure 6 This is a schematic diagram of the drive component structure of the present invention; Figure 7 This is a schematic diagram of the clamping assembly structure of the present invention; Figure 8 This is a top view schematic diagram of the guide wheel, grinding wheel, and support plate of the present invention; Figure 9 This is a front view schematic diagram of the guide wheel, grinding wheel, and support plate of the present invention.

[0018] In the diagram: 11. Guide wheel; 12. Grinding wheel; 13. Support plate; 14. Support surface; 15. Assembly part; 20. Guiding mechanism; 21. Assembly seat; 211. Adjustment groove; 212. Bolt; 22. Support block; 221. Through hole; 23. Butt plate; 231. Inclined part; 232. Screw; 233. Nut; 24. Transmission wheel; 25. Drive assembly; 251. Rubber ring; 252. Support wheel; 253. Pushing wheel; 254. Motor; 26. Pressing assembly; 261. Pressure roller; 262. Support shaft; 263. Support frame; 264. Connecting seat; 265. Torsion spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0021] The guide wheel 11 and the grinding wheel 12 are provided with a support plate 13 between them. The guide wheel 11 is deflected relative to the grinding wheel 12 at a preset angle θ in the horizontal plane. θ is 1°–3°. The bar tends to contact the side of the guide wheel 11 under the guidance of the support plate 13. When the deflected guide wheel 11 rotates at a low speed, its circumferential speed can be decomposed into: tangential component - causing the bar to rotate; axial component - "pushing" the bar along the feed direction. This allows the bar to advance along the axial direction in the working area between the guide wheel 11 and the support plate 13, so that the bar is ground by the grinding wheel 12 rotating on one side during its advance. The guide mechanism 20 is located on both sides of the pallet 13. The guide mechanism 20 feeds the bar into the working area between the guide wheel 11 and the pallet 13 at a preset speed. The preset speed is consistent with the speed at which the bar moves in the working area. The guiding mechanism 20 includes an assembly base 21 mounted on one end of the pallet 13. A pair of docking plates 23 are mounted on the upper side of the assembly base 21 via a support block 22. A rotatable transmission wheel 24 is provided on the upper side of the docking plate 23. A drive assembly 25 for driving the transmission wheel 24 to rotate is provided on one side of the docking plate 23. A pair of docking plates 23 dock with the support plate 13. The bar is pushed by the conveyor wheel 24 and enters the working area from one side of the guide wheel 11 at a preset speed and is ground by the grinding wheel 12. After grinding, the bar is output from the other side of the working area and is actively received and exported by another guiding mechanism 20. In the initial stage of entering the working area and the final stage of exporting from the working area, the bar is able to enter and exit at a preset speed through the setting of the guiding mechanism 20, which prevents the bar from lingering at this position, causing the grinding wheel 12 to over-grind, and further causing the bar to have a "small at both ends and large in the middle" phenomenon.

[0022] Combination Figures 2-3 , Figure 9 The upper side of the support plate 13 is provided with an inclined support surface 14. The surface of the support surface 14 is biased to one side of the guide wheel 11. The bar comes into contact with the side of the guide wheel 11 under the action of gravity on the surface of the support surface 14, so that the guide wheel 11, which rotates later, controls the bar to move forward in its length direction.

[0023] The upper side of the docking plate 23 is provided with an inclined part 231. The inclined part 231 has the same inclination angle as the support surface 14. The inclined part 231 on one docking plate 23 is on the same plane as the support surface 14. The position of the other docking plate 23 is such that the bar supported by the upper side of the pair of docking plates 23 is coaxial with the bar between the guide wheel 11 and the support plate 13. With the above arrangement, the bar placed on the docking plate 23 can be accurately docked into the working area, and the bar output from one side of the working area can be smoothly docked with another guide mechanism 20 on the other side.

[0024] Combination Figures 3-5 Multiple conveyor wheels 24 are provided, and all multiple conveyor wheels 24 are inclinedly mounted on the upper side of the docking plate 23. When the bar just enters the working area or just exits the working area, the bar itself will also rotate. By setting the conveyor wheels 24 at an inclination, the conveyor wheels 24 in this rotation mode are also adapted to the bar's rotation.

[0025] Furthermore, the arc surface of the conveyor wheel 24 is covered with a rubber coating, which increases the friction between the conveyor wheel 24 and the bar, ensuring that the rotating conveyor wheel 24 can stably push the bar to move.

[0026] Combination Figures 5-6 The drive assembly 25 includes a rubber ring 251, which is supported on the underside of the conveyor wheel 24 by support wheels 252 on both sides. The upper surface of the rubber ring 251 is in frictional contact with the lower surface of the conveyor wheel 24. A motor 254 is also provided on the underside of one support wheel 252 to drive the support wheel 252 to rotate. The motor 254 drives the support wheel 252 to rotate, so that the rubber ring 251 moves below the conveyor wheel 24. Since the conveyor wheel 24 and the rubber ring 251 are in frictional contact, the rubber ring 251 can drive the conveyor wheel 24 in an inclined state to rotate.

[0027] Furthermore, multiple pushing rollers 253 are provided on the inner side of the rubber ring 251. The multiple pushing rollers 253 are staggered with the multiple conveying rollers 24. The multiple pushing rollers 253 squeeze the rubber ring 251 towards the conveying rollers 24, so that the rubber ring 251 and the multiple conveying rollers 24 come into frictional contact. Through the above arrangement, the rubber ring 251 can drive the multiple inclined conveying rollers 24 to rotate synchronously according to the preset rotation, further ensuring the stability of the conveying rollers 24 in conveying the bar.

[0028] Combination Figures 3-7 A clamping component 26 is also provided on one side of the docking plate 23, which presses the bar downward.

[0029] Specifically, the clamping assembly 26 includes a pressure roller 261, a support shaft 262 rotatably mounted on the inner side of the pressure roller 261, a support frame 263 connected to one side of the support shaft 262, a connecting seat 264 hinged at the lower end of the support frame 263, the connecting seat 264 being fixedly mounted on one side of the docking plate 23, and a torsion spring 265 mounted on the hinge shaft between the support frame 263 and the connecting seat 264, the torsion spring 265 elastically driving the support frame 263 to rotate downward.

[0030] The connecting seat 264 is located on the side near the guide wheel 11. When a bar passes above a pair of docking plates 23, the support frame 263, which is elastically driven by the torsion spring 265, drives the pressure wheel 261 downward, causing the pressure wheel 261 to press on the upper side of the bar, thereby increasing the friction between the bar and the conveyor wheel 24 and further ensuring the stable movement of the bar. During the process of the bar being taken out of the working area, since most of the bar is still in contact with the guide wheel 11, the bar can be driven by the guide wheel 11 to lift the pressure wheel 261, so that the pressure wheel 261 presses on the upper side of the bar.

[0031] It should be noted that the spring constant of torsion spring 265 is relatively small, which allows the bar to push the pressure roller 261 upward under the drive of guide wheel 11.

[0032] Combination Figures 4-5 The support block 22 has through holes 221 on its surface.

[0033] A screw 232 is fixedly connected to one side of the mating plate 23. The screw 232 is movably inserted into the inside of the through hole 221, which allows the mating plate 23 to be adjusted in position on one side of the support block 22 so that the mating plate 23 can be adjusted to a preset position. The surface of the screw 232 is also provided with a nut 233 to fix the position of the screw 232 on the support block 22. After the mating plate 23 is adjusted to the preset position, the mating plate 23 is fixed in the preset position by tightening the nut 233.

[0034] Combination Figures 2-4 Both sides of the pallet 13 are provided with mounting parts 15 protruding from both sides of the guide wheel 11.

[0035] An adjustment groove 211 is provided on the lower side of the mounting base 21. The adjustment groove 211 is movably fitted with the mounting part 15. A threaded connecting bolt 212 is also provided on one side of the mounting base 21. By rotating the bolt 212, the mounting base 21 is pressed against the side of the mounting part 15, and the mounting base 21 is fixedly mounted on the upper side of the mounting part 15. Specifically, after the mounting base 21 is mounted on the mounting part 15 at a preset height, the position is fixed by the bolt 212, so that the height of the mounting base 21 can be freely adjusted.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A centerless grinding device for metal bars, characterized in that, include: (11) and (12), with (13) provided between (11) and (12), (11) deflects at a preset angle relative to (12) in the horizontal plane, and the rod tends to contact the side of (11) under the guidance of (13); (20), the (20) is disposed on both sides of (13), the (20) includes (21) assembled at one end of (13), a pair of (23) are installed on the upper side of the (21) via (22), the upper side of the (23) is provided with a rotatable (24), and the side of the (23) is provided with a (25) for driving (24) to rotate. When the pair of (23) and (13) are connected, the bar is pushed from one side of (11) into the working area between (11) and (13) and is ground by (12). Then the ground bar is output from the other side of (11) and (13) and actively received and exported by another (20).

2. The centerless grinding device for metal rods according to claim 1, characterized in that: The upper side of the (13) is provided with an inclined (14), and the surface of the (14) is biased towards the (11) side; The upper side of (23) is provided with (231), the tilt angle of (231) is the same as that of (14), one of the (23) and (14) are on the same plane, and the setting position of the other (23) can make the rods supported by the upper side of the pair of (23) coaxial with the rods in the middle of (11) and (13).

3. The centerless grinding device for metal rods according to claim 2, characterized in that: Multiple (24) are provided, and multiple (24) are obliquely assembled on the upper side of (23).

4. The centerless grinding device for metal rods according to claim 3, characterized in that: The (24) arc surface is covered with a rubber material covering layer.

5. The centerless grinding device for metal rods according to claim 2, characterized in that: The (25) includes (251), which is supported on the lower side of (24) by (252) on both sides. The upper surface of (251) is in frictional contact with the lower surface of (24). The lower side of one of the (252) is also provided with (254) for driving (252) to rotate.

6. The centerless grinding apparatus for metal rods according to claim 5, characterized in that: The inner side of the (251) is also provided with a plurality of (253), which are staggered with the plurality of (24). The plurality of (253) press the (251) towards the (24) direction, so that the (251) and the plurality of (24) come into frictional contact.

7. The centerless grinding device for metal rods according to claim 1, characterized in that: (26) is also provided on one side of (23), and (26) extrudes the bar downward.

8. The centerless grinding apparatus for metal rods according to claim 7, characterized in that: The (26) includes (261), the inner side of the (261) is rotatably provided with (262), one side of the (262) is connected with (263), the lower end of the (263) is hinged with (264), the (264) is fixedly assembled on one side of the (23), the hinge shaft of the (263) and (264) is provided with (265), the (265) elastically drives the (263) to rotate downward.

9. The centerless grinding device for metal rods according to claim 1, characterized in that: The surface of (22) is provided with (221); (23) is fixedly connected to one side of (232), (232) is movably inserted into the inside of (221), and the surface of (232) is also provided with (233) for fixing the position of (232) on (22).

10. The centerless grinding apparatus for metal bars according to claim 1, characterized in that: Both sides of the (13) are provided with protrusions (15) on both sides of the (11); The lower side of the (21) is provided with (211), which is movably fitted with (15). The (21) is also provided with a threaded connection (212) on one side. By rotating (212) and pressing it against the side of (15), the (21) is fixedly assembled on the upper side of (15).

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