Automatic grinding device suitable for short shafts with large size span

Abstract

The utility model discloses an automatic grinding device suitable for short shafts with larger size span, which comprises a robot, and a product turnover frame, an automatic feeding machine and a blanking turnover frame which are arranged in the operation range of the robot, a feeding conveyor, a centerless grinding machine, a discharging conveyor, a receiving conveyor and a rotary conveyor are sequentially arranged between the automatic feeding machine and the discharging turnover frame, a mechanical discharging hand is arranged between the feeding conveyor and the automatic feeding machine, and a mechanical discharging hand is arranged between the discharging conveyor and the receiving conveyor. The mechanical discharging hand and the mechanical discharging hand each comprise a bearing platform, a plurality of L-shaped arc-shaped bearing arms are arranged on the bearing platforms at intervals, the top of each L-shaped arc-shaped bearing arm is in shaft connection with the corresponding material supporting plate, the sides, away from the L-shaped arc-shaped bearing arms, of the multiple material supporting plates are connected through a synchronizing shaft, and the synchronizing shaft is in shaft connection with one end of a pushing air cylinder. The device can be suitable for products of different sizes, and is stable in operation, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaft product processing, and concretely relates to an automatic grinding device suitable for short shafts with large size span. BACKGROUND

[0002] Grinding of shaft products is a key precision machining process in machining, and is mainly used to improve the dimensional accuracy, geometric shape accuracy and surface roughness of shafts to meet assembly and functional requirements. The centerless grinding machine is a high-precision grinding equipment for processing the outer surface of cylindrical workpieces, and does not need to use a center or a chuck to fix the workpiece, but achieves positioning and grinding through the coordinated action of the bearing support plate, guide wheel and grinding wheel, so it is extremely suitable for processing shaft products.

[0003] Due to the different lengths and diameters of shaft products, the existing processing equipment has poor adaptability, mainly in the aspects of feeding and discharging of materials, specifically including the following problems:

[0004] 1. Load bearing capacity of feeding and discharging lifting mechanism: for long and thick shafts, for example, shaft products with an outer diameter of 120 mm and a length of 1 meter, the weight is about 90 kg. The load bearing capacity of the feeding and discharging lifting mechanism in the existing equipment cannot meet the required standard. If the lifting force is not enough, the product cannot be stably transferred, there is a risk of falling back to the grinding roller, and when feeding, the product directly contacts the grinding roller, which forms a large impact force on the grinding roller, causing displacement, vibration or deformation of the grinding roller. Thus, during the processing of the centerless grinding machine, processing quality problems such as scratches at the beginning and end are caused, and the size control for grinding high-precision short shafts cannot be completed.

[0005] 2. Universality of feeding and discharging lifting mechanism: for example, for products with a length of 200-1000 mm and an outer diameter of 60-120 mm, due to the large span of 200 mm and 1000 mm, the existing feeding and discharging lifting mechanism cannot meet the simultaneous use of short shafts and long shafts. The short shafts will fall off the feeding and discharging lifting mechanism and cannot be supported, and the long shafts can be effectively supported, but the weight is increased, which causes the inability to bear the load.

[0006] 3. Safety problem: for heavy shafts, the existing equipment basically adopts manual carrying or uses a crane to assist carrying with clamps. Such operation mode has high safety risk and is prone to accidents of workpiece falling and injuring the operator. SUMMARY

[0007] The technical problem to be solved by the utility model is to provide an automatic grinding device suitable for short shafts with large size span, which can be applied to products of different sizes, runs stably, and is safe and reliable.

[0008] In order to solve the above technical problems, the utility model provides a kind of automatic grinding device suitable for size span larger short shaft, including robot and centerless grinding machine, product turnover frame, automatic feeding machine and unloading turnover frame are provided in the robot operating range, the centerless grinding machine two ends are respectively provided with infeed conveyor and discharge conveyor, mechanical discharging hand is provided between the infeed conveyor and automatic feeding machine, discharge conveyor side is provided with receiving conveyor, mechanical discharging hand is provided between discharge conveyor and receiving conveyor, receiving conveyor and unloading turnover frame are provided with rotary conveyor between them;

[0009] The mechanical discharging hand is fixed on the automatic feeding machine, the mechanical discharging hand is fixed on the receiving conveyor, and the mechanical discharging hand and the mechanical discharging hand both include a bearing platform, a plurality of L-shaped arc-shaped bearing arms are arranged on the bearing platform, the top of each L-shaped arc-shaped bearing arm is connected with a corresponding material tray shaft, a plurality of material trays are connected by a synchronous shaft on the side away from the L-shaped arc-shaped bearing arm, the synchronous shaft is connected with the one end of the push cylinder, and the other end of the push cylinder is connected with the bottom side end of the corresponding L-shaped arc-shaped bearing arm.

[0010] The L-shaped arc-shaped bearing arm, the material tray and the push cylinder cooperate to form a mouth-shaped structure and are sleeved on the corresponding infeed conveyor or discharge conveyor.

[0011] Further, the plurality of L-shaped arc-shaped bearing arms are connected by a reinforcing plate, the reinforcing plate is arranged on the side close to the material tray, the plurality of L-shaped arc-shaped bearing arms are fixedly arranged on the sliding platform, and a sliding adjusting assembly is arranged between the sliding platform and the bearing platform.

[0012] Further, the surface of the material tray is provided with a material receiving arc-shaped groove, and the surface of the material tray is also provided with a buffer edge.

[0013] Further, the receiving conveyor is provided with a sampling mechanism, the sampling mechanism includes a material pushing cylinder and a sampling platform, and the material pushing cylinder and the sampling platform are arranged on both sides of the width of the receiving conveyor respectively.

[0014] Further, the sampling platform includes an L-shaped bearing table, the L-shaped bearing table is provided with a clamping seat at the bottom, the clamping seat is clamped on a fixed shaft, the fixed shaft is fixedly connected with a supporting platform at both ends, and the L-shaped bearing table is further provided with two jacking adjusting blocks on the side in the radial direction of the fixed shaft.

[0015] Further, the rotary conveyor includes a plate chain conveyor, the plate chain conveyor is provided with a side baffle on one side, the unloading turnover frame is provided with a movable push plate at the corresponding side baffle, the movable push plate is connected with a discharging cylinder, and the movable push plate is provided with an induction sensor.

[0016] Further, at least three guide support strips and transmission chains are arranged on the blanking turnover frame and the material receiving conveyor, a transmission chain is arranged between two adjacent guide support strips, a plurality of transmission chains are arranged on the gear transmission assembly and rotate synchronously, a blocking block is arranged on the transmission chain, and the blocking block is used for extending to the top surface of the guide support strip and cooperating to form a limiting angle.

[0017] Further, a position adjusting mechanism is arranged at the end of the blanking turnover frame, the position adjusting mechanism comprises two transmission rollers, the two transmission rollers are arranged at intervals and the axes thereof are arranged at an angle, the two transmission rollers rotate synchronously and in the same direction, and a plurality of adjusting rollers are arranged on the transmission rollers.

[0018] Further, the product turnover frame comprises a blank turnover box, a finished product turnover box and a defective product turnover box, and the automatic feeding machine, the blanking turnover frame, the material feeding conveyor, the material discharging conveyor, the material receiving conveyor and the rotary conveyor are all provided with a lifting adjusting assembly.

[0019] Further, the robot is provided with an electromagnetic chuck.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. The robot is used to realize the carrying of shaft products, that is, to perform feeding and discharging operations, and solves the safety accidents caused by manual carrying of heavy products, the product turnover frame, the automatic feeding machine and the blanking turnover frame are arranged within the operation range (arm spread range) of the robot, the layout is concentrated, the investment cost is reduced, and the efficiency is improved.

[0022] 2. The mechanical discharging hand adopts a mouth-shaped structure design, so that the stress is evenly dispersed when the heavy product falls or is taken away, and the problem of easy damage caused by stress concentration of a single pendulum arm structure is avoided. Moreover, the overall strength is high, stable and reliable, the vibration generated is effectively transmitted to the corresponding automatic feeding machine or material receiving conveyor through the bearing platform, the material feeding conveyor and the material discharging conveyor are not affected, the processing and transportation are more stable, and the service life is greatly improved.

[0023] 3. The self-design of the L-shaped arc-shaped bearing arm greatly increases the bearing capacity, meets the use of thick shafts and long thick shafts, and through the control of the adjacent arrangement spacing of the L-shaped arc-shaped bearing arms, short shafts can always be supported by two L-shaped arc-shaped bearing arms, that is, the universality of long and short shaft products is ensured, and the applicability of thick and thin shaft products is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall layout structure of the present application.

[0025] Figure 2It is grinding flow transfer part structure schematic view of the utility model;

[0026] Figure 3 It is the schematic diagram of the cooperation structure of the feeding part of the utility model;

[0027] Figure 4 It is the schematic diagram of the mechanical feeding hand structure of the utility model;

[0028] Figure 5 It is the schematic diagram of the cooperation structure of the discharging part of the utility model;

[0029] Figure 6 It is the first visual angle structure schematic diagram of the sampling platform of the utility model;

[0030] Figure 7 It is the second visual angle structure schematic diagram of the sampling platform of the utility model;

[0031] Figure 8 It is the schematic diagram of the rotary conveyor structure of the utility model;

[0032] Figure 9 It is the schematic diagram of the discharging turnover rack part structure of the utility model. Specific implementation

[0033] The utility model will be further described in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0034] Referring to Figures 1 to 5 The embodiment of the automatic grinding device of the utility model with larger size span of short shaft type, comprising robot 1 and centerless grinder 2, product turnover rack 3, automatic feeding machine 4 and discharging turnover rack 5 are arranged in the running range of the robot, the product turnover rack includes blank turnover box 37, finished product turnover box 38 and defective product turnover box 39, the running range of the robot is equivalent to the arm span range of the robot, in the range, the robot can arbitrarily grab and place the product, that is, the shaft type product on the blank turnover box can be grabbed and placed on the automatic feeding machine, the shaft type product on the discharging turnover rack can be grabbed and placed in the finished product turnover box or the defective product turnover box, so as to realize the turnover of the product that has not been processed or has been processed, without manual carrying, and after centralized design, the robot only needs to be installed with one to meet the requirements, saving cost. The robot is provided with an electromagnetic chuck, the shaft type product is grabbed through the electromagnetic chuck, which has high safety, high magnetic attraction strength, and will not fall off, compared with the existing mechanical clamping jaw, the mechanical clamping jaw has the risk of falling off when grabbing the heavy shaft.

[0035] The centerless grinding machine is provided with an in-feed conveyor 6 and an out-feed conveyor 7 at two ends, respectively, and a mechanical in-feed hand 8 is arranged between the in-feed conveyor and the automatic in-feed machine, a receiving conveyor 9 is arranged on one side of the out-feed conveyor, a mechanical out-feed hand 10 is arranged between the out-feed conveyor and the receiving conveyor, and a rotary conveyor 11 is arranged between the receiving conveyor and the out-feed trolley.

[0036] The size span of the shaft product is large, and when the equipment needs to meet both short shafts and thick shafts, the requirements for the mechanical in-feed hand and the mechanical out-feed hand are high, specifically in terms of bearing capacity and support effect direction. The thick shaft has a large mass, and the poor bearing capacity of the mechanical in-feed hand and the mechanical out-feed hand can easily cause damage to some mechanical joints, while the short shaft has a short size, and the large internal gap of the mechanical in-feed hand and the mechanical out-feed hand cannot support it. Specifically, the mechanical in-feed hand is fixed on the automatic in-feed machine, and the mechanical out-feed hand is fixed on the receiving conveyor. The impact force of the shaft falling can be transferred to the automatic in-feed machine, without causing vibration to the in-feed conveyor. When the shaft is flipped and unloaded, the reaction force is not applied to the out-feed conveyor, maintaining the stability of the operation.

[0037] The mechanical in-feed hand and the mechanical out-feed hand are designed to include a bearing platform 12, and a plurality of L-shaped arc-shaped bearing arms 13 are arranged on the bearing platform in intervals. The top of each L-shaped arc-shaped bearing arm is connected to a corresponding material supporting plate 14, and a plurality of material supporting plates are connected by a synchronous shaft 15 on the side away from the L-shaped arc-shaped bearing arm. The synchronous shaft is connected to one end of a push cylinder 16, and the other end of the push cylinder is connected to the bottom side end of the corresponding L-shaped arc-shaped bearing arm. The L-shaped arc-shaped bearing arm, the material supporting plate and the push cylinder cooperate to form a mouth-shaped structure and are sleeved on the corresponding in-feed conveyor or out-feed conveyor. The material supporting plate surface is provided with a material receiving arc-shaped groove 20, and the material supporting plate surface is also provided with a buffer edge. Through the design of the mouth-shaped structure, the product is located in the material receiving arc-shaped groove on the top, and the product weight is dispersed to both sides, one side is transmitted to the bearing platform by the L-shaped arc-shaped bearing arm, and the other side is transmitted to the bearing platform by the synchronous shaft and the push cylinder, thereby effectively dispersing the stress and greatly improving the bearing capacity and service life.

[0038] Specifically, in order to improve the bearing capacity, the plurality of L-shaped arc-shaped bearing arms are connected into one through the reinforcing plate 17, the reinforcing plate is arranged on the side close to the material supporting plate, and the connection strength of the shaft connection is improved. And the plurality of L-shaped arc-shaped bearing arms are fixedly arranged on the sliding platform 18, and the sliding adjusting assembly 19 is arranged between the sliding platform and the bearing platform. Through the sliding adjusting assembly, the material supporting arc-shaped groove can be located on the supporting position of the feeding conveyor, so that the position of the material is accurately ensured.

[0039] In use, the automatic feeding machine lifts a single blank to the top by jacking, the top plane is an inclined plane, and the material falling from the self-weight rolls into the material supporting arc-shaped groove on the surface of the material supporting plate. The impact force of the falling is dispersed to the L-shaped arc-shaped bearing arms and the push cylinder at both ends of the material supporting plate, effectively dispersing the impact force, having strong supporting capacity, and when it is needed to discharge the material, the push cylinder is retracted, so that one end of the material supporting plate moves downward, and the other end cannot move due to the shaft connection with the L-shaped arc-shaped bearing arm and can only rotate. Therefore, the material supporting plate rotates and moves downward, and in the rotating process, the blank is transferred to the transmission wheel of the feeding conveyor, and then is transmitted. After the blank is sent away, the push cylinder continues to extend, so that the material supporting plate rotates and moves upward, and the material supporting plate moves to the transmission wheel for placing the subsequent blank. Therefore, the impact force of the falling blank cannot impact the feeding conveyor.

[0040] After the blank is processed by the centerless grinding machine, the blank is transmitted to the mechanical discharging hand position at the end of the discharging conveyor. A sensor can be arranged at the position to detect whether the product is in place. After the product is in place, the push cylinder is extended to push the material supporting plate to rotate and move upward, so that the product is lifted upward from the transmission wheel of the discharging conveyor. In the rotating process, one end of the material supporting plate is high and the other end is low, so that the product rolls to the collecting conveyor. Since the collecting conveyor continues to transfer the product.

[0041] At least three guide support strips 31 and transmission chains 32 are arranged on the discharging turnover frame and the collecting conveyor. The transmission chain is arranged between two adjacent guide support strips, a plurality of transmission chains are arranged on the gear transmission assembly and rotate synchronously, the transmission chain is provided with a blocking block 34, and the blocking block is used to extend the top surface of the guide support strip and cooperate to form a limiting angle. After the product rolls, the product is blocked by the blocking block and cannot continue to move. The gear transmission assembly drives the transmission chain to rotate, the transmission chain drives the blocking block to move, and the guide support strip is arranged in an inclined state. Therefore, the product rolls due to the self-weight and always keeps in contact with the blocking block while the blocking block moves. When the blocking block moves to the side of the rotary conveyor, the transmission chain continues to rotate and drives the blocking block to rotate from the top to the bottom. In this process, the blocking block releases the limiting of the product, and the product continues to roll to the rotary conveyor.

[0042] Reference Figure 6 andFigure 7 As shown, in order to be able to sample the ground product, a sampling mechanism 111 is arranged on the receiving conveyor, and the sampling mechanism includes a pushing cylinder 21 and a sampling platform 22, and the pushing cylinder and the sampling platform are arranged on both sides of the width of the receiving conveyor. When the product falls into the corresponding position on the receiving conveyor, the pushing cylinder is extended to push the product axially into the sampling platform, and the product is detected on the sampling platform by manual detection, and after detection, it is manually pushed into the receiving conveyor.

[0043] The sampling platform includes an L-shaped bearing table 23, and the L-shaped bearing table is provided with a clamping seat 24 at the bottom, the clamping seat is clamped on a fixed shaft 112, and the two ends of the fixed shaft are fixedly connected with a supporting platform 25. The L-shaped bearing table is also provided with two jacking adjusting blocks 26 on one side in the radial direction of the fixed shaft, and the supporting platform is fixedly connected with the receiving conveyor. Because the contact point position of the shaft with different diameters with the L-shaped bearing table is different, and the diameter is larger, the risk of rolling is also larger, so by setting the jacking adjusting block and cooperating with the fixed shaft, the inclination angle of the L-shaped bearing table can be adjusted. The jacking adjusting block is provided with a screw, and by rotating the screw, the jacking adjusting block can be extended or retracted, that is, the distance between the jacking adjusting block and the bottom of the L-shaped bearing table is adjustable, so as to realize the adjustment effect of the inclination angle.

[0044] Referring to Figure 8 As shown, after the product reaches the rotary conveyor, it is transmitted by the rotary conveyor to the direction of the robot. Specifically, the rotary conveyor includes a plate chain conveyor 27, and one side of the plate chain conveyor is provided with a side baffle 28. The movable push plate 29 is arranged at the side baffle corresponding to the unloading turntable, and the movable push plate is connected with the unloading cylinder 30. The movable push plate is provided with an induction sensor. After the product rolls, it will be blocked by the side baffle and fall into the upper side of the plate chain conveyor. The product is moved along the axial direction by the plate chain conveyor until the front of the movable push plate. After the induction sensor receives the product signal, the unloading cylinder is actuated to extend and push the product to the unloading turntable by the movable push plate. Since it is pushed radially, the product will roll onto the unloading turntable. The transmission mode of the unloading turntable is consistent with that of the receiving conveyor, and the product is transmitted and moved one by one until the end, so that the robot can grasp it.

[0045] Due to the different thickness, different length of the shaft, the center position is different, in order to facilitate the robot to grasp in the shaft center position, to avoid the deviation of the pickup to cause the problem of dropping, the blanking turnover frame is designed to set the position adjusting mechanism on the end thereof, the position adjusting mechanism comprises two transmission rollers 35, the two transmission rollers are arranged at intervals and the axis is arranged at an angle, the two transmission rollers rotate synchronously and in the same direction, and a plurality of adjusting rollers 36 are arranged on the transmission rollers. Through the layout in different directions, in the synchronous and same direction rotating process, the shaft can be moved to the determined direction, when the shaft is moved to the position, according to the size parameter of the shaft, the robot can effectively identify the position of the shaft, so as to facilitate accurate grasping.

[0046] The automatic feeding machine, the blanking turnover frame, the feeding conveyor, the discharging conveyor, the receiving conveyor and the rotary conveyor are provided with the lifting adjusting assembly, and the lifting adjusting assembly can effectively adjust the setting height, so as to ensure the position matching degree between the components.

[0047] The above examples are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. The equivalent substitutions or transformations made by the person skilled in the art on the basis of the present application are all within the protection scope of the present application.

Claims

1. An automatic grinding device for short shafts with a large size span, characterized in that, The application relates to a robot and a centerless grinding machine, wherein a product turnover frame, an automatic feeding machine and a discharging turnover frame are arranged in the running range of the robot, the centerless grinding machine is provided with an infeed conveyor and an outfeed conveyor at two ends, a mechanical feeding hand is arranged between the infeed conveyor and the automatic feeding machine, a receiving conveyor is arranged on one side of the outfeed conveyor, a mechanical discharging hand is arranged between the outfeed conveyor and the receiving conveyor, and a rotary conveyor is arranged between the receiving conveyor and the discharging turnover frame. The mechanical feeding hand is fixed on the automatic feeding machine, the mechanical discharging hand is fixed on the receiving conveyor, the mechanical feeding hand and the mechanical discharging hand both comprise a bearing platform, a plurality of L-shaped arc-shaped bearing arms are arranged on the bearing platform in a spaced mode, the top of each L-shaped arc-shaped bearing arm is connected with a corresponding material supporting plate shaft, a plurality of material supporting plates are connected through a synchronous shaft on the side away from the L-shaped arc-shaped bearing arms, the synchronous shaft is connected with one end of a pushing air cylinder, and the other end of the pushing air cylinder is connected with the bottom side end of the corresponding L-shaped arc-shaped bearing arm. The L-shaped arc-shaped bearing arm, the material supporting plate and the pushing air cylinder cooperatively form a mouth-shaped structure and are sleeved on the corresponding infeed conveyor or outfeed conveyor.

2. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, The plurality of L-shaped arc-shaped bearing arms are connected into an integrated whole through reinforcing plates arranged on the side close to the material supporting plates, the plurality of L-shaped arc-shaped bearing arms are fixedly arranged on a sliding platform, and a sliding adjusting assembly is arranged between the sliding platform and the bearing platform.

3. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, A material receiving arc-shaped groove is arranged on the surface of the material supporting plate, and a buffer edge is further arranged on the surface of the material supporting plate.

4. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, A sampling mechanism is arranged on the receiving conveyor, the sampling mechanism comprises a material pushing air cylinder and a sampling platform, and the material pushing air cylinder and the sampling platform are arranged on the two sides of the width of the receiving conveyor.

5. The automatic grinding device for short shafts with a large size span according to claim 4, characterized in that, The sampling platform comprises an L-shaped bearing table, a clamping seat is arranged at the bottom of the L-shaped bearing table, the clamping seat is clamped on a fixed shaft, the two ends of the fixed shaft are fixedly connected with a supporting platform, two jacking adjusting blocks are further arranged on the side of the fixed shaft in the radial direction, and the supporting platform is fixedly connected with the receiving conveyor.

6. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, The rotary conveyor comprises a plate chain conveyor, a side baffle is arranged on one side of the plate chain conveyor, a movable push plate is arranged at the corresponding side baffle of the discharging turnover frame, the movable push plate is connected with a discharging air cylinder, and a sensing sensor is arranged on the movable push plate.

7. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, At least three guide supporting strips and transmission chains are arranged on the discharging turnover frame and the receiving conveyor, a transmission chain is arranged between two adjacent guide supporting strips, a plurality of transmission chains are arranged on a gear transmission assembly and rotate synchronously, a blocking block is arranged on the transmission chain, and the blocking block is used for extending to the top surface of the guide supporting strip and cooperatively forming a limiting clamping angle.

8. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, A position adjusting mechanism is arranged on the end of the discharging turnover frame, the position adjusting mechanism comprises two transmission rollers, the two transmission rollers are arranged in a spaced mode and the axes thereof are arranged in a clamping angle mode, the two transmission rollers rotate synchronously and in the same direction, and a plurality of adjusting rollers are arranged on the transmission rollers.

9. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, The product turnover frame comprises an embryo turnover box, a finished product turnover box and a defective product turnover box, and the automatic feeding machine, the discharging turnover frame, the feeding conveyor, the discharging conveyor, the receiving conveyor and the rotary conveyor are provided with lifting adjusting assemblies.

10. The automatic grinding device for short shafts with a large size span according to claim 1, characterized in that, The robot is provided with an electromagnetic chuck.

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