Discharging device of centerless machine tool

Abstract

The invention discloses a discharging device of a centerless machine tool, and relates to the technical field of intelligent manufacturing. A plurality of supporting rods are fixed to a rotating disc in a surrounding mode, the rotating disc is arranged to be capable of being driven to rotate intermittently, rotating control of the rotating disc is associated with the complete quit action after bar grinding, and by means of rotating stirring, the discharging device of the centerless machine tool is achieved. Through the arrangement of the first guide face and the second guide face, the bar materials which are ground on the discharging frame can be moved away in time, in the rotating process, the bar materials can smoothly and stably roll down for discharging operation by means of guiding of the first guide face and the second guide face, the situation that the bar materials stop on the discharging frame after being ground is avoided, and the working efficiency is improved. Therefore, advancing of the bar which is being ground between the guide wheel and the grinding wheel is prevented from being blocked, the stable effect that the bar is ground by the centerless machine tool can be effectively guaranteed, and the probability that the surface of the bar is burnt and excessively ground in the grinding process is reduced.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing technology, and in particular to a feeding device for a centerless machine tool. Background Technology

[0002] In the field of centerless grinding, the automated and efficient processing of bar stock is a core requirement for improving production efficiency and product quality. As a key link connecting grinding and subsequent processes, the stability of the unloading device directly affects the overall processing flow.

[0003] In existing technologies, the unloading devices for centerless grinding machine tools for bar stock often employ an inclined chute structure. The track-like chute guides the ground bar stock from the machine tool's outlet to a designated collection area. However, in actual batch processing scenarios, to ensure unloading stability, the outlet is typically set to be relatively long to temporarily store the ground bar stock. Then, through continuous unloading, the bar stock temporarily stored at the outlet is pushed one by one into the chute structure for unloading. During this process, the bar stock temporarily stored at the outlet physically obstructs the bar stock that is moving along a preset trajectory within the machine tool during grinding. This forces a slowdown in the bar stock's movement within the grinding machine, disrupting the originally stable grinding rhythm. On one hand, the extended residence time of the bar stock in the grinding area leads to excessive heat generated by the continuous friction between the grinding wheel and the workpiece surface, easily exceeding the cooling system's heat dissipation capacity and causing burn defects on the workpiece surface. On the other hand, excessively long grinding times cause the actual material removal to exceed the process setting, leading to over-grinding and affecting processing stability. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art where the movement of the bar stock at the discharge port of a centerless grinding machine relies on the movement of the bar stock in the grinding state inside the machine tool, which easily causes the bar stock's travel speed inside the machine tool to slow down, leading to overheating and burning of the bar stock surface during centerless grinding, as well as over-grinding. Therefore, this invention proposes a bar stock unloading device for a centerless grinding machine.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A feeding device for a centerless machine tool includes a machine body. A guide wheel and a grinding wheel are rotatably mounted side-by-side inside the machine body. A feed rack is fixedly mounted at the front end of the machine body, positioned between the guide wheel and the grinding wheel. A discharge rack, corresponding to the feed rack, is fixedly mounted at the rear end of the machine body. The discharge rack has a slot. A guide plate is fixedly mounted inside the machine body, positioned between the guide wheel and the grinding wheel, and is fixedly connected between the feed rack and the discharge rack. A feeding mechanism is located at the rear of the machine body. The feeding mechanism includes a bearing seat, within which a component rotatably mounted with respect to the feed rack and the discharge rack is mounted. The material rack has parallel shafts, and a servo motor for driving the shaft rotation is fixedly installed on the shaft seat. Two turntables are installed sequentially from front to back on the shaft. Multiple support rods are fixedly installed around the outer side of each turntable. The multiple support rods on the front and rear turntables are arranged one-to-one. The circumferential trajectory of the multiple support rods in the front corresponds to the slot, and the circumferential trajectory of the multiple support rods in the rear is located behind the material discharge rack. One side of the support rod is set as the first guide surface, and the other side of the support rod is set as the second guide surface. A material storage mechanism corresponding to the unloading mechanism is set at the rear of the machine tool body.

[0006] Preferably, the first guiding surface is a smooth surface and the second guiding surface is a rough surface. During the rolling process of the bar stock, the frictional resistance provided by the second guiding surface is greater than the frictional resistance provided by the first guiding surface.

[0007] Preferably, a stop is fixedly installed at the end of the support rod away from the turntable, and the stop is disposed on the first guide surface.

[0008] Preferably, the storage mechanism includes a base, and the top of the base is provided with a guide groove. The side of the guide groove away from the support rod is designed to be inclined downward. An arc-shaped notch is provided on the side of the base near the support rod, and the curvature of the arc-shaped notch is adapted to the rotation trajectory of the support rod.

[0009] Preferably, a collection box is placed on the side of the base away from the arc-shaped notch, and a V-shaped frame is provided inside the collection box, with one side of the V-shaped frame connecting to the guide groove.

[0010] Preferably, a first buffer mechanism is installed on the turntable, and the first buffer mechanism includes multiple fixed plates that are fixed around the turntable. Each fixed plate is located between two adjacent support rods. A rod is slidably inserted into the fixed plate, and a guide plate is fixedly installed on the side of the rod away from the center of the turntable. Each guide plate is installed between a first guide surface and a second guide surface provided on two adjacent support rods. A first spring that is elastically supported between the fixed plate and the guide plate is movably sleeved on the outside of the rod.

[0011] Preferably, the side of the guide plate away from the insertion rod is configured with a V-shaped structure, and both ends of the guide plate near the first guide surface and the second guide surface are hinged with sealing plates. A torsion spring is installed at the hinge position between the sealing plate and the guide plate. One sealing plate is in contact with the first guide surface under the elastic support of the torsion spring, and the other sealing plate is in contact with the second guide surface under the elastic support of the torsion spring.

[0012] Preferably, a second buffer mechanism is installed on the support rod. The second buffer mechanism includes multiple pressure plates that are rotatably installed inside the support rod and protrude outward from the second guide surface. A support block is installed inside the support rod, and a second spring for elastically supporting the pressure plates is fixed on the support block. A limiting block for restricting the outward rotation of the pressure plates is fixed on the side of the support rod near the second guide surface.

[0013] Preferably, the support block is slidably installed inside the support rod, and a slide rod is slidably installed inside the support rod on the side near the first guide surface, and the slide rod is arranged parallel to the support rod. An inclined block is slidably attached to the side of the support block away from the second spring, and the inclined block is fixedly connected to the slide rod. A screw rod is rotatably installed inside the support rod and arranged parallel to it, and the screw rod is threadedly connected to the slide rod.

[0014] Preferably, the shaft is configured as a square rod structure, a bushing is fixedly installed at the center of the turntable, and the bushing is slidably sleeved on the shaft. A bolt is threaded onto the bushing, and the bolt points to the outer surface of the shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by fixing multiple support rods around a turntable and setting the turntable to be driven to rotate intermittently, the rotation control of the turntable is associated with the complete withdrawal action of the bar stock after grinding. With the help of rotation, the ground bar stock on the discharge rack can be removed in time. During the rotation, with the guidance of the first guide surface and the second guide surface, the bar stock can roll down smoothly and stably for unloading. This helps to prevent the bar stock from staying on the discharge rack after grinding, and thus prevents the bar stock being ground between the guide wheel and the grinding wheel from being blocked. This can effectively ensure the stability of the bar stock being ground by the centerless machine tool and help reduce the probability of surface burns and over-grinding during the bar stock grinding process. 2. In this invention, by setting the first buffer mechanism between two adjacent support rods to connect the first guide surface and the second guide surface, the bar stock can be buffered to a certain extent during the unloading and rolling process. At the same time, by setting the second buffer mechanism inside the support rod and acting on the second guide surface, the bar stock needs to press the pressure plate to consume the rolling potential energy when rolling on the second guide surface. With the adjustment of the buffering force of the second buffer mechanism, the device can be adapted to bar stock of different specifications for stable unloading and guiding. With the cooperation of both, the smoothness and stability of the bar stock during the guidance and storage after grinding can be effectively guaranteed. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the invention from the front. Figure 2 This is a perspective view of the invention from the rear view. Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 3 Sectional view at point AA; Figure 5 For the present invention Figure 3 Sectional view at point BB; Figure 6 For the present invention Figure 5 Enlarged view at point D; Figure 7 For the present invention Figure 3 Sectional view at CC; Figure 8 This is a perspective view of the feeding mechanism and storage mechanism of the present invention from the rear view. Figure 9 This is a perspective view of the feeding mechanism of the present invention from the rear view. Figure 10 This is a perspective view of the first buffer mechanism of the present invention; Figure 11 This is a perspective view of the second buffer mechanism of the present invention.

[0017] In the picture: 1. Machine tool body; 11. Guide wheel; 12. Grinding wheel; 13. Feed rack; 14. Discharge rack; 15. Groove; 16. Guide plate; 2. Shaft seat; 21. Shaft rod; 22. Servo motor; 23. Turntable; 24. Support rod; 25. First guide surface; 26. Second guide surface; 27. Stop block; 3. Base; 31. Guide groove; 32. Arc-shaped notch; 33. Collection box; 34. V-shaped frame; 4. Fixing plate; 41. Insert rod; 42. Connecting plate; 43. First spring; 44. Sealing plate; 5. Pressure plate; 51. Support block; 52. Second spring; 53. Limiting block; 54. Slide rod; 55. Inclined block; 56. Screw rod; 6. Bushing; 61. Bolt. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example: This example provides a feeding device for a centerless machine tool. See [link to example]. Figure 1 - Figure 11 Specifically, the machine tool includes a machine body 1, within which guide wheels 11 and grinding wheels 12 are rotatably mounted side-by-side. A feed rack 13 is fixedly mounted at the front end of the machine body 1, positioned between the guide wheels 11 and grinding wheels 12. A discharge rack 14, corresponding to the feed rack 13, is fixedly mounted at the rear end of the machine body 1. The discharge rack 14 has a slot 15. A guide plate 16, positioned between the guide wheels 11 and grinding wheels 12, is fixedly mounted within the machine body 1, and is fixedly connected between the feed rack 13 and the discharge rack 14. A feeding mechanism is located at the rear of the machine body 1, and this feeding mechanism includes a bearing 2. A bearing 13, which is rotatably mounted within the bearing 2, is connected to the feed rack 13 and the discharge rack 14. 4. A parallel shaft 21 is provided. A servo motor 22 for driving the shaft 21 to rotate is fixedly installed on the shaft seat 2. Two turntables 23 are installed on the shaft 21 from front to back. Multiple support rods 24 are fixedly installed on the outer side of each turntable 23. The multiple support rods 24 on the front and rear turntables 23 are arranged one-to-one. The circumferential trajectory of the multiple support rods 24 in the front corresponds to the slot 15. The circumferential trajectory of the multiple support rods 24 in the rear is located behind the discharge rack 14. One side of the support rod 24 is set as the first guide surface 25, and the other side of the support rod 24 is set as the second guide surface 26. A storage mechanism corresponding to the unloading mechanism is provided at the rear of the machine tool body 1.

[0020] The material storage mechanism includes a base 3, and a guide groove 31 is provided on the top of the base 3. The side of the guide groove 31 away from the support rod 24 is designed to be inclined downward. An arc-shaped notch 32 is provided on the side of the base 3 near the support rod 24, and the curvature of the arc-shaped notch 32 is adapted to the rotation trajectory of the support rod 24. A collection box 33 is placed on the side of the base 3 away from the arc-shaped notch 32, and a V-shaped frame 34 is provided inside the collection box 33. One side of the V-shaped frame 34 is connected to the guide groove 31.

[0021] When the device is in use, the guide wheel 11 and the grinding wheel 12 are driven to rotate continuously by the drive device. The bar stock enters from the feed rack 13 between the guide wheel 11 and the grinding wheel 12 on the left and right sides and is placed on the guide plate 16. Driven by the rotation of the guide wheel 11 and the grinding wheel 12, it moves backward in an orderly manner. During this process, the cylindrical surface of the bar stock is ground centerlessly by the grinding wheel 12. After grinding, the bar stock is discharged through the rear end of the guide plate 16. In the initial stage, the rear half of the bar stock is placed on the discharge rack 14, while the front half of the bar stock is still ground between the guide wheel 11 and the grinding wheel 12. In this state, the movement of the bar stock towards the discharge rack 14 can also be driven backward by the rotation of the guide wheel 11 and the grinding wheel 12. After the bar stock is completely ground, it completely exits from between the guide wheel 11 and the grinding wheel 12, and the front end of the bar stock no longer contacts the guide wheel 11 and the grinding wheel 12.

[0022] In the above state, the rotation of the guide wheel 11 and the grinding wheel 12 cannot provide power for the movement of the bar stock on the discharge rack 14. If the existing technology uses a chute structure to unload the bar stock, the power for the bar stock to move from the discharge rack 14 to the chute is usually the movement of the bar stock being ground between the front guide wheel 11 and the grinding wheel 12. The movement of the bar stock in the grinding state between the front guide wheel 11 and the grinding wheel 12 creates a backward push, driving the bar stock on the discharge rack 14 to continue moving backward and sliding into the chute structure connected at the rear. During this process, the bar stock temporarily stored on the discharge rack 14 will obstruct the bar stock between the guide wheel 11 and the grinding wheel 12, resulting in a longer grinding time for the bar stock and affecting the processing stability. This effect is particularly noticeable when centerless grinding is performed on heavier bar stock.

[0023] During the operation of this device, the control of the feeding mechanism is related to the rhythm of the bar stock being discharged from the discharge rack 14 after grinding. When the bar stock is finished being ground by the grinding wheel 12 and moves onto the discharge rack 14, completely separating from the guide wheel 11 and the grinding wheel 12, the servo motor 22 is powered on and starts, driving the shaft 21 fixedly connected to it to rotate, which in turn drives the turntables 23 mounted on the front and rear sides of the shaft 21 to rotate. The angle of rotation of the turntable 23 is controlled according to the number of support rods 24 mounted around a single turntable 23. Taking a single turntable 23 with six support rods 24 mounted around it as an example, the angle of rotation of the turntable 23 is controlled each time. The control rotation angle is 60°. When not rotated, the front support rod 24 is in the slot 15, and the first guide surface 25 on the support rod 24 is below the bar stock on the discharge rack 14. During the rotation of the support rod 24 driven by the turntable 23, the corresponding first guide surface 25 first contacts the bottom of the bar stock on the discharge rack 14. Through the rotation of the support rod 24, the bar stock is quickly lifted and discharged from the discharge rack 14, so that the bar stock that has just separated from the guide wheel 11 and the grinding wheel 12 on the discharge rack 14 can be quickly removed without obstructing the bar stock that will be subsequently ground in the guide wheel 11 and the grinding wheel 12.

[0024] The turntable 23 drives numerous support rods 24 to rotate intermittently, conveying the bar stock on the discharge rack 14 to the storage mechanism. During this process, as the bar stock on the discharge rack 14 is quickly discharged through the paired support rods 24, the first guide surface 25 tilts downwards due to the rotation of the support rods 24. This allows the lifted bar stock to slide downwards along the first guide surface 25. Taking the direction of rotation of the turntable 23 and the support rods 24 as a reference, the bar stock will briefly stop between two adjacent support rods 24 before continuing to rotate. During the rotation operation, when the adjacent support rods 24 in the rotation direction are rotated and docked on the guide groove 31 in the storage mechanism, the support rods 24 are tilted downwards. At this time, the bar stock between the two adjacent support rods 24 can slide along the second guide surface 26 onto the support rods 24. With the support of the support rods 24, it slides down along the second guide surface 26 onto the guide groove 31. After being guided by the guide groove 31, it slides into the V-shaped frame 34. With the continuous feeding of the bar stock, it is stacked and stored in an orderly manner in the V-shaped frame 34.

[0025] In this device, by opening an arc-shaped notch 32 on the side of the base 3 near the feeding mechanism, a suitable space is provided for the rotation of the support rod 24, so that the support rod 24 can achieve a near-seamless docking with the guide groove 31 during rotation. This makes the process of the bar stock sliding down the second guide surface 26 onto the guide groove 31 more continuous and stable. In this device, the collection box 33 and the base 3 are designed to be separable, which facilitates quick replacement when the bar stock in the collection box 33 is full. By setting the V-shaped frame 34 in the collection box 33, with the guidance of the V-shaped end wall in the V-shaped frame 34 and the inclined guidance of the guide groove 31, the bar stock is stacked more smoothly in the collection box 33 and is less likely to slip due to high drop. This can effectively prevent the bar stock from being damaged by collision during feeding and storage.

[0026] In the specific implementation process, the first guide surface 25 is set as a smooth surface and the second guide surface 26 is set as a rough surface. During the rolling process of the bar, the frictional resistance provided by the second guide surface 26 is greater than that provided by the first guide surface 25. When the device is used, by setting the first guide surface 25 as a smooth surface, the bar can roll down along the first guide surface 25 more smoothly and quickly. By setting the second guide surface 26 as a rough surface, the falling speed of the bar can be slowed down when it rolls down along the second guide surface 26. This avoids the bar sliding down the second guide surface 26 too fast on the support rod 24 when the turntable 23 drives the support rod 24 to rotate and dock with the storage mechanism, which would result in an excessive height difference of the bar falling onto the guide groove 31. This can effectively prevent the bar from falling and colliding and being damaged.

[0027] In the specific implementation process, such as Figure 6 , Figure 8 and Figure 9 As shown, a stop 27 is fixedly installed at the end of the support rod 24 away from the turntable 23, and the stop 27 is set on the first guide surface 25. When the device is in use, by fixing the stop 27 on one side of the first guide surface 25 on the support rod 24 and setting the stop 27 at the end position away from the turntable 23, the support rod 24 can prevent the bar from slipping off the side of the first guide surface 25 away from the turntable 23 when it is quickly discharged from the discharge rack 14 by lifting the bar in the circular motion. This helps to ensure the stability of the bar after it is processed by the centerless machine tool.

[0028] In the specific implementation process, such as Figure 6 and Figure 8 - Figure 10 As shown, a first buffer mechanism is installed on the turntable 23, and the first buffer mechanism includes multiple fixed plates 4 that are fixed around the turntable 23. Each fixed plate 4 is located between two adjacent support rods 24. A rod 41 is slidably inserted into the fixed plate 4, and a guide plate 42 is fixedly installed on the side of the rod 41 away from the center of the turntable 23. Each guide plate 42 is installed between the first guide surface 25 and the second guide surface 26 provided on two adjacent support rods 24. A first spring 43 is movably sleeved on the outside of the rod 41 and elastically supported between the fixed plate 4 and the guide plate 42. The side of the guide plate 42 away from the rod 41 is set with a V-shaped structure. A sealing plate 44 is hinged to both ends of the guide plate 42 near the first guide surface 25 and the second guide surface 26. A torsion spring is installed at the hinge position between the sealing plate 44 and the guide plate 42. One sealing plate 44 is in contact with the first guide surface 25 under the elastic support of the torsion spring, and the other sealing plate 44 is in contact with the second guide surface 26 under the elastic support of the torsion spring.

[0029] During the operation of the device, when the bar slides down along the first guide surface 25 and briefly stops between two adjacent support rods 24, the first buffer mechanism is triggered. The falling bar rolls down along the first guide surface 25 onto the receiving plate 42, applying a force to the receiving plate 42 to move it towards the turntable 23. During this process, the sliding friction between the fixed plate 4 and the insertion rod 41, as well as the elastic support of the first spring 43, can buffer the impact formed by the rolling of the bar, preventing the bar from being damaged by hard collision after sliding down along the first guide surface 25. Furthermore, the buffering effect through the receiving plate 42 can effectively reduce the vibration and impact on the turntable 23 during rotation, which is conducive to ensuring the stability of the precise operation of the feeding mechanism.

[0030] In this device, when the receiving plate 42 is used to buffer and pick up the bar stock, by setting the end of the receiving plate 42 away from the insertion rod 41 into a V-shaped structure, the falling bar stock can be positioned so that the bar stock can accurately stop in the middle position of the receiving plate 42. At the same time, by hinged to the two ends of the receiving plate 42 respectively, and with the elastic support of the torsion spring at the hinge position, the two sealing plates 44 can always be in close contact with the first guide surface 25 or the second guide surface 26 in the corresponding direction during the force movement of the receiving plate 42. This helps to ensure the smoothness and stability of the bar stock rolling down from the first guide surface 25 to the middle position of the receiving plate 42 and transferring from the middle position of the receiving plate 42 to the second guide surface 26.

[0031] In the specific implementation process, such as Figure 6 , Figure 9 and Figure 11 As shown, a second buffer mechanism is installed on the support rod 24. The second buffer mechanism includes multiple pressure plates 5 rotatably installed inside the support rod 24 and protruding outward from the second guide surface 26. A support block 51 is installed inside the support rod 24, and a second spring 52 for elastically supporting the pressure plate 5 is fixed on the support block 51. A limiting block 53 for restricting the outward rotation of the pressure plate 5 is fixed on the side of the support rod 24 near the second guide surface 26. The support block 51 is slidably installed inside the support rod 24. A slide rod 54 is slidably installed inside the support rod 24 near the first guide surface 25 and is parallel to the support rod 24. An inclined block 55 is slidably attached to the side of the support block 51 away from the second spring 52 and is fixedly connected to the slide rod 54. A screw 56 is rotatably installed inside the support rod 24 and is parallel to it, and the screw 56 is threadedly connected to the slide rod 54.

[0032] When the device is in use, as the bar slides down the second guide surface 26, the second buffer mechanism is triggered to press the pressure plates 5 evenly distributed on the support rod 24. With the rotational connection between the pressure plate 5 and the support rod 24, and the elastic support of the pressure plate 5 by the second spring 52, the bar will be slightly blocked as it passes over the pressure plate 5. The elastic support of the pressure plate 5 by the second spring 52 can reduce the rolling speed of the bar to a certain extent. Together with the second guide surface 26, which can provide greater frictional resistance, the device can effectively ensure the stability of the bar rolling down the second guide surface 26 onto the guide groove 31.

[0033] In this device, the limiting block 53 restricts the pressure plate 5 from extending beyond the second guide surface 26 to its extreme position. When the operator needs to adjust the amount by which the second buffer mechanism slows down the rolling speed of the bar, they can rotate the screw 56. Through the threaded connection between the screw 56 and the slide rod 54, the slide rod 54 can be driven to move the inclined block 55 along the support rod 24. By adjusting the position of the inclined block 55, the support amplitude of the inclined block 55 on the support block 51 can be adjusted. When the inclined block 55 is moved towards the turntable 23 by the slide rod 54, the squeezing and pushing amplitude of the inclined block 55 on the support block 51 increases. In this state, the second spring 52 is further compressed, and the kinetic energy consumed by the bar pressing over the pressure plate 5 during the rolling process increases. The larger size of the second guide surface 26 further slows down the speed at which the bar stock rolls down. When the inclined block 55 is moved away from the turntable 23 by the slide rod 54, the amount of pressure exerted by the inclined block 55 on the support block 51 decreases. In this state, the compression of the second spring 52 is released to a certain extent, and the kinetic energy consumed by the bar stock pressing over the pressure plate 5 during its rolling process is reduced, which increases the speed at which the bar stock rolls down on the second guide surface 26. The above-mentioned structural design allows the operator to control the speed at which the bar stock rolls down on the second guide surface 26 onto the guide groove 31 by adjusting the second buffer mechanism, so that bar stock of different specifications and qualities can be stably and orderly fed and transported by the device.

[0034] In the specific implementation process, such as Figure 6 , Figure 7 and Figure 10 As shown, the shaft 21 is configured as a square rod structure. A bushing 6 is fixedly installed at the center of the turntable 23, and the bushing 6 is slidably sleeved on the shaft 21. A bolt 61 is threaded onto the bushing 6, and the bolt 61 points to the outer surface of the shaft 21. When the device is in use, by fixing the bushing 6 at the center of the turntable 23 and sliding the bushing 6 onto the shaft 21, the distance between the front and rear turntables 23 can be flexibly adjusted by the sliding connection between the bushing 6 and the shaft 21. By adjusting the distance between the front and rear turntables 23, the distance between the corresponding front and rear support rods 24 can be adjusted synchronously, so that the device can lift bars of different lengths for rapid unloading, which can effectively improve the applicability of the device.

[0035] Specifically, the working principle of this invention is as follows: The bar stock is centerlessly ground by the grinding wheel 12 between the guide wheel 11 and the grinding wheel 12. Under the differential rotation of the guide wheel 11 and the grinding wheel 12, the bar stock is driven to move backward on the guide plate 16 and finally exit onto the discharge rack 14. At this time, the servo motor 22 drives the shaft 21 to rotate, which drives the turntable 23 to drive multiple support rods 24 to rotate. When the support rods 24 pass through the slot 15 from bottom to top, they will lift the bar stock on the discharge rack 14 and quickly detach it. With the tilting caused by the rotation of the support rods 24, the bar stock rolls down along the first guide surface 25 between two adjacent support rods 24. Guided by the first buffer mechanism, the bar stock can smoothly remain on the receiving plate 42 between two adjacent support rods 24. As it continues to rotate, the support rod 24 tilts downward and connects with the guide groove 31 in the storage mechanism. At this time, the bar stock on the receiving plate 42 between the two adjacent support rods 24 can roll down along the second guide surface 26 onto the guide groove 31. During the rolling process, the second buffer mechanism can slow down the rolling speed. After being guided by the guide groove 31, it is finally collected on the V-shaped frame 34 in the collection box 33, completing the unloading operation after bar stock processing.

[0036] The above are merely preferred embodiments 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 feeding device for a centerless machine tool, comprising a machine tool body (1), characterized in that: The machine tool body (1) is rotatably mounted with guide wheels (11) and grinding wheels (12). A feed rack (13) is fixedly mounted at the front end of the machine tool body (1), and a discharge rack (14) is fixedly mounted at the rear end of the machine tool body (1). A slot (15) is opened in the discharge rack (14). A guide plate (16) is fixedly mounted in the machine tool body (1) between the guide wheels (11) and the grinding wheels (12), and the guide plate (16) is fixedly connected between the feed rack (13) and the discharge rack (14). A feeding mechanism is provided at the rear of the machine tool body (1), and the feeding mechanism includes a bearing seat (2). A shaft rod (21) is rotatably mounted in the bearing seat (2). 2) A servo motor (22) for driving the shaft (21) to rotate is fixedly installed on the shaft (21). Two turntables (23) are installed on the shaft (21) from front to back. Multiple support rods (24) are fixedly installed on the outer side of each turntable (23). The circumferential trajectory of the multiple support rods (24) in front corresponds to the slot (15). The circumferential trajectory of the multiple support rods (24) in the rear is located behind the discharge rack (14). One side of the support rod (24) is set as a first guide surface (25), and the other side of the support rod (24) is set as a second guide surface (26). A storage mechanism corresponding to the unloading mechanism is set at the rear of the machine tool body (1).

2. The unloading device for a centerless machine tool according to claim 1, characterized in that: The first guide surface (25) is set as a smooth surface, and the second guide surface (26) is set as a rough surface. During the rolling process of the bar stock, the frictional resistance provided by the second guide surface (26) is greater than the frictional resistance provided by the first guide surface (25).

3. The unloading device for a centerless machine tool according to claim 1, characterized in that: A stop (27) is fixedly installed at the end of the support rod (24) away from the turntable (23), and the stop (27) is set on the first guide surface (25).

4. The unloading device for a centerless machine tool according to claim 1, characterized in that: The storage mechanism includes a base (3), and a guide groove (31) is provided on the top of the base (3). The side of the guide groove (31) away from the support rod (24) is set to be inclined downward. An arc-shaped notch (32) is provided on the side of the base (3) close to the support rod (24), and the arc of the arc-shaped notch (32) is adapted to the rotation trajectory of the support rod (24).

5. The unloading device for a centerless machine tool according to claim 4, characterized in that: A collection box (33) is placed on the side of the base (3) away from the arc-shaped notch (32), and a V-shaped frame (34) is provided inside the collection box (33). One side of the V-shaped frame (34) is connected to the guide groove (31).

6. The unloading device for a centerless machine tool according to claim 1, characterized in that: A first buffer mechanism is installed on the turntable (23), and the first buffer mechanism includes multiple fixed plates (4) that are fixed around the turntable (23). Each fixed plate (4) is located between two adjacent support rods (24). A rod (41) is slidably inserted into the fixed plate (4), and a guide plate (42) is fixedly installed on the side of the rod (41) away from the center of the turntable (23). Each guide plate (42) is installed between a first guide surface (25) and a second guide surface (26) provided on two adjacent support rods (24). A first spring (43) is movably sleeved on the outside of the rod (41) and elastically supported between the fixed plate (4) and the guide plate (42).

7. The unloading device for a centerless machine tool according to claim 6, characterized in that: The side of the receiving plate (42) away from the insertion rod (41) is configured with a V-shaped structure. Both ends of the receiving plate (42) near the first guide surface (25) and the second guide surface (26) are hinged with sealing plates (44). A torsion spring is installed at the hinge position between the sealing plate (44) and the receiving plate (42). One of the sealing plates (44) is in contact with the first guide surface (25) under the elastic support of the torsion spring, and the other sealing plate (44) is in contact with the second guide surface (26) under the elastic support of the torsion spring.

8. The unloading device for a centerless machine tool according to claim 1, characterized in that: A second buffer mechanism is installed on the support rod (24). The second buffer mechanism includes multiple pressure plates (5) that are rotatably installed inside the support rod (24) and protrude outward from the second guide surface (26). A support block (51) is installed inside the support rod (24), and a second spring (52) for elastically supporting the pressure plate (5) is fixed on the support block (51). A limiting block (53) for restricting the pressure plate (5) from rotating outward is fixed on one side of the support rod (24) near the second guide surface (26).

9. The unloading device for a centerless machine tool according to claim 8, characterized in that: The support block (51) is slidably installed inside the support rod (24). A slide rod (54) is slidably installed inside the support rod (24) on the side near the first guide surface (25), and the slide rod (54) is parallel to the support rod (24). A wedge block (55) is slidably attached to the side of the support block (51) away from the second spring (52), and the wedge block (55) is fixedly connected to the slide rod (54). A screw rod (56) is rotatably installed inside the support rod (24) and is parallel to it, and the screw rod (56) is threadedly connected to the slide rod (54).

10. The feeding device for a centerless machine tool according to claim 1, characterized in that: The shaft (21) is configured as a square rod structure. A bushing (6) is fixedly installed at the center of the turntable (23), and the bushing (6) is slidably sleeved on the shaft (21). A bolt (61) is threaded onto the bushing (6), and the bolt (61) points to the outer surface of the shaft (21).

Images