Automatic bar feeding device

Abstract

The utility model discloses an automatic bar feeding device which comprises a machine frame, a lifting mechanism and a translation mechanism, the lifting mechanism and the translation mechanism are arranged on the machine frame, and a pushing mechanism and a roller gripper mechanism are installed on the lifting mechanism. The lifting mechanism comprises a base plate arranged on the machine frame, a lifting executing mechanism and a lifting guiding mechanism, the lifting executing mechanism and the lifting guiding mechanism are arranged on the base plate, the movable ends of the lifting executing mechanism and the lifting guiding mechanism are both connected with the movable sliding rail, the pushing mechanisms are installed on the movable sliding rail, and the number of the pushing mechanisms is four. Each group consists of a group of material pushing brackets and a group of material pushing executing mechanisms, each group of material pushing executing mechanisms are mounted on the material pushing brackets, and the material pushing brackets are mounted at symmetrical positions on the side surfaces of the movable sliding rails; and the roller gripper mechanism comprises a main mounting plate, and a roller, a clamping jaw and a material level sensing mechanism which are arranged on the main mounting plate. The automatic bar feeding device can be used in cooperation with a standard material frame and a feeding machine, and full-automatic production of the feeding procedure of an automatic production line is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic production of bar materials, and in particular relates to an automatic feeding device for bar materials. Background Art

[0002] Although the existing bar feeder can be used to complete the automatic feeding of the production line, the operator is still required to perform intermittent manual feeding from the material rack to the material bin of the feeder, and the degree of automation is not high enough. Therefore, it is necessary to design an automatic bar feeding device to replace the manual process of carrying the material from the material rack to the material bin of the feeder, so as to realize the automatic feeding of the bar feeder of the automated production line, thereby fully realizing the fully automated production of the automated production line in the feeding process. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model proposes an automatic bar material feeding device.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an automatic feeding device for bar materials, including a frame and a lifting mechanism and a translation mechanism arranged on the frame, a pushing mechanism and a roller gripping mechanism are installed on the lifting mechanism; the lifting mechanism includes a base plate arranged on the frame and a lifting actuator and a lifting guide mechanism arranged on the base plate, the movable ends of the lifting actuator and the lifting guide mechanism are connected to the movable slide rail, the pushing mechanism is installed on the movable slide rail, the pushing mechanism has four groups, each group is composed of a group of pushing brackets and a group of pushing actuators, each group of pushing actuators is installed on the pushing brackets, and the pushing brackets are installed in symmetrical positions on the side of the movable slide rail; the roller gripping mechanism includes a main mounting plate and rollers, clamps and material level sensors arranged on the main mounting plate Mechanism, a first mechanical pneumatic valve, a second mechanical pneumatic valve, a clamping plate for opening the clamp and a clamping rod for closing the clamp are installed on one side of the clamping actuator mounting seat, the material level sensing mechanism includes an articulated seat fastened to the main mounting plate and a balancing block connected to the articulated seat by a hinged manner, a counterweight is hung on one side of the balancing block, and the other side is pressed on the third mechanical pneumatic valve through a pressure plate, the roller gripper mechanism is hung in the movable slide rail of the lifting mechanism through a roller, and a limit groove locking structure for automatically positioning and locking the roller gripper mechanism is arranged inside the movable slide rail; the translation mechanism includes a translation actuator and a fixed slide rail fixed on the frame, the translation actuator includes a fixed shaft whose two ends are respectively fixed to the frame and the lifting mechanism base plate through a fixed seat, and a movable end sleeved on the fixed shaft.

[0005] Furthermore, the distance between the two groups of material pushing actuators on the same side of the movable slide rail is greater than the width of a standard material rack.

[0006] Furthermore, two groups of pusher actuators on the same side of the movable slide rail are connected to each other through a connecting piece.

[0007] Furthermore, the lifting actuator is installed at the middle position of the base plate, and the guide sleeves of the lifting guide mechanism are symmetrically installed on both sides of the lifting actuator.

[0008] Furthermore, the height at which the counterweight is hung is adjustable.

[0009] Furthermore, a hook is arranged on the movable end of the translation actuator.

[0010] Furthermore, the draw hooks are two screws mounted on the movable ends of the translation actuator.

[0011] Furthermore, the material level sensing mechanism includes a mechanical gravity sensor.

[0012] Furthermore, a pneumatic control loop is provided between the mechanical gravity sensor and the gripper actuator.

[0013] Furthermore, the rollers are in four groups, and every two groups of rollers are fixedly mounted on both ends of the main mounting plate through roller connecting rods.

[0014] Compared with the prior art, the positive effects of the utility model are:

[0015] 1. The bar material automatic feeding device of the utility model can be used in conjunction with a standard material rack and a feeder to realize fully automated production of the feeding process of an automated production line. Workers only need to hoist the material rack and push it into the corresponding station of the bar material automatic feeding device and start the automatic control, which reduces labor intensity and allows one person to be on duty at 3 to 4 feeding stations, which can help production companies reduce staff, reduce costs and increase efficiency.

[0016] 2. The gripper of the roller gripper mechanism adopts a compact symmetrical design. The structure includes a clamp, a clamp actuator, a material level sensing mechanism, a roller, etc., and the material level sensing mechanism includes a mechanical gravity sensor. A pneumatic control circuit is set between the gripper actuator and the mechanical gravity sensor to ensure that the gripper can automatically grasp the bar material when the mechanical gravity sensor contacts the bar material in the rack. This type of mechanical gravity sensor can also be derived into other types of sensing devices, such as photoelectric sensing devices. The gripper spacing is controlled within a reasonable small range to prevent the smooth gripping effect from being affected by the messy placement of the bars in the rack.

[0017] 3. The translational slide adopts a segmented design, one section of the movable slide is connected to the lifting mechanism, and the other section of the fixed slide is fixed to the translation mechanism. A limit slot locking structure is set in the movable slide. When the lifting mechanism and the roller gripper mechanism leave the upper limit and descend to the material rack to perform the material grabbing action, the limit slot locking structure can keep the roller gripper mechanism in the movable slide. When the lifting mechanism returns to the upper limit, the movable slide can ensure that the roller gripper mechanism can slide smoothly in the running direction of the translation mechanism under the drive of the translation mechanism.

[0018] 4. In order to ensure the timeliness of the material grabbing action and avoid excessive material shortage in the hopper of the loader, the detection of the material rack level in the automatic feeding device of the bar material and the feeding action when there is a shortage of material can be added to the PLC program. When it is detected that the material rack level is too low, the device signal lighthouse will sound an alarm to remind the operator to replace the rack in time; when there is a shortage of material, the feeding action of the automatic feeding device fails to grab enough bar materials and put them into the hopper of the loader within the specified time, until the set hopper limit is exceeded, the signal lighthouse will also sound an alarm to remind the operator to handle it.

[0019] 5. The device uses compressed air as the power source. Each step of the action can be detected by the mechanical pneumatic valve to determine whether the action is in place and provide power to the actuator of the next action. It can also detect whether each cylinder is in place through the proximity switch. When the feeder is out of material, the bar material automatic feeding device can complete a refilling action within 1 minute. The number of refills each time is greater than 20 pieces. The refilling efficiency is higher than the production efficiency of the production line and can meet the normal production needs of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of an automatic bar feeding device;

[0022] Figure 2 It is a schematic diagram of the structure of the rack;

[0023] Figure 3 It is a structural diagram of the lifting mechanism and the pushing mechanism;

[0024] Figure 4 It is the front view of the roller gripper mechanism;

[0025] Figure 5 is a side view of the roller gripper mechanism;

[0026] Figure 6 is a top view of the roller gripper mechanism;

[0027] Figure 7 is a three-dimensional diagram of a roller gripper mechanism;

[0028] Figure 8 It is a structural schematic diagram of the translation mechanism;

[0029] Fig. 9 This is a schematic diagram of hoisting a standard material rack with materials into the rack roller;

[0030] Fig.10 A schematic diagram of a material rack with materials being pushed into a material-waiting station in an automatic bar material feeding device;

[0031] Fig.11 It is a schematic diagram of the lifting mechanism stopping descending when the gripper mechanism and the pusher mechanism approach the bar material in the material rack;

[0032] Fig.12 It is a schematic diagram showing that the bars in the rack are pushed and concentrated in the middle area of ​​the rack;

[0033] Fig.13 It is a schematic diagram of the gripper mechanism grabbing the bar material and the pusher mechanism returning it;

[0034] Fig.14 It is a schematic diagram showing that the slide groove in the lifting mechanism is aligned with the fixed slide groove of the translation mechanism when the lifting mechanism is lifted to the upper limit position;

[0035] Fig.15 for Fig.14 A front view of

[0036] Fig.16 A schematic diagram showing that the translation mechanism pulls the roller gripper mechanism carrying the material above the material bin of the loader, and the lifting mechanism and the pushing mechanism keep their current positions unchanged, waiting for the roller gripper mechanism to return to its original position;

[0037] Fig.17 It is a schematic diagram of material discharge by roller gripper mechanism;

[0038] Fig.18 It is a schematic diagram of the roller gripper mechanism being automatically brought back into the sliding groove of the lifting mechanism by the translation mechanism;

[0039] Reference numerals in the figures include:

[0040] Frame 1, material pushing mechanism 2, roller gripper mechanism 3, material level sensing mechanism 4, translation mechanism 5, lifting mechanism 6;

[0041] Material rack temporary storage area 11, material grabbing area 12, material discharge area 13, lifting mechanism installation position 14 and translation mechanism installation position 15;

[0042] A material pushing bracket 21, a material pushing actuator 22, and a connecting piece 23;

[0043] Main mounting plate 31, clamping jaw fixing seat 32, clamping jaw fixing hinged end 33, clamping jaw movable hinged end 34, clamping jaw 35, first mechanical pneumatic valve 36, second mechanical pneumatic valve 37, third mechanical pneumatic valve 38, hinged seat 39, balance block 40, counterweight block 41, clamping jaw opening position pressing plate 42, clamping jaw closing position pressing rod 43, roller 44, roller connecting rod 45;

[0044] Translation actuator 51, fixed slide rail 52, hook 53, fixed slide slot 54;

[0045] Base plate 61 , lifting actuator 62 , lifting guide mechanism 63 , guide sleeve 64 , lifting mechanism movable end 65 , lifting guide mechanism movable end 66 , movable slide rail 67 , limit groove locking structure 68 . DETAILED DESCRIPTION

[0046] An automatic bar feeding device, such as Figure 1 As shown, it includes a frame 1, a material pushing mechanism 2, a roller gripper mechanism 3, a material level sensing mechanism 4, a translation mechanism 5, a lifting mechanism 6, etc., wherein:

[0047] The frame 1 is mainly assembled from profiles, and its structure is as follows Figure 2 As shown, the rack 1 can be divided into a temporary storage area 11, a material grabbing area 12, a material discharge area 13, a lifting mechanism installation position 14 and a translation mechanism installation position 15 according to the functional areas, wherein: the temporary storage area 11 of the rack is assembled by a roller row composed of a plurality of rollers. The rack 1 mainly plays the role of carrying the lifting mechanism and the translation mechanism. The lifting mechanism is installed in the material grabbing area, and the translation mechanism is installed in the material discharge area.

[0048] like Figure 3 As shown, the lifting mechanism 6 is mainly composed of a base plate 61, a lifting actuator 62, a lifting guide mechanism 63, a guide sleeve 64, a lifting mechanism movable end 65, a lifting guide mechanism movable end 66, and a movable slide rail 67. The lifting actuator 62 is installed in the middle position of the base plate 61 and is responsible for executing the lifting action of the entire lifting mechanism. The lifting mechanism movable end 65 and the lifting guide mechanism movable end 66 are both connected to the movable slide rail 67. The guide sleeve 64 of the lifting guide mechanism is installed at symmetrical positions on both sides of the lifting actuator on the base plate. There are four groups of pusher mechanisms 2, each of which is composed of a group of pusher brackets 21 and a group of pusher actuators 22. Each group of pusher actuators 22 is installed on the pusher bracket 21, and then installed at a symmetrical position on the side of the movable slide rail 67 through the pusher bracket. The spacing between the two groups of pusher actuators on the same side is slightly wider than the width of the standard material rack, ensuring that the standard material rack can be smoothly pushed into the lower part of the lifting mechanism to wait for material grabbing. The two groups of pusher actuators on the same side are connected to each other by a connecting piece 23 to enhance the structural strength. A limit groove locking structure 68 is designed inside the movable slide rail for automatically positioning and locking the roller gripper mechanism 3 .

[0049] like Figures 4 to 7 As shown, the roller gripper mechanism 3 includes a main mounting plate 31, a clamping jaw fixing seat 32, a clamping jaw fixing hinged end 33, a clamping jaw movable hinged end 34, a clamping jaw 35, a first mechanical pneumatic valve 36, a second mechanical pneumatic valve 37, a third mechanical pneumatic valve 38, an articulated seat 39, a balancing block 40, a counterweight block 41, a clamping jaw opening position pressing plate 42, a clamping jaw closing position pressing rod 43, a roller 44, a roller connecting rod 45, etc., wherein:

[0050] The four fixed hinged ends 33 of the clamping jaws are symmetrically and staggeredly installed on the clamping jaw fixing seat by means of hinged connection, and the movable ends of the clamping jaws are hinged to the movable ends of the clamping jaw actuators through the movable hinged ends 34 of the clamping jaws. The clamping jaw fixing seat 32 is fastened to the symmetrical positions on both sides of the middle of the main mounting plate 31, and the fixed ends of the clamping jaw actuators are fastened to the clamping jaw actuator mounting seat, and the clamping jaw actuator mounting seat is fastened to the middle of the main mounting plate 31. The first mechanical pneumatic valve 36 and the second mechanical pneumatic valve 37 are installed on one side of the clamping jaw actuator mounting seat. One of them is responsible for providing the air source for opening the clamping jaws, and the other is responsible for providing the air source for closing the clamping jaws. The two mechanical pneumatic valves are interlocked through the air circuit. When the clamping jaws are opened, the clamping jaws are opened to the full pressure plate 42 to press the first mechanical pneumatic valve 36, while the clamping jaws are closed to the full pressure rod 43 and do not press the second mechanical pneumatic valve 37, and the state is now waiting for the material to be grasped.

[0051] The material level sensing mechanism 4 includes a third mechanical pneumatic valve 38, an articulated seat 39, a balancing block 40, a counterweight 41, etc., wherein the balancing block 40 is connected to the articulated seat 39 by an articulated manner, and the articulated seat is fastened to the main mounting plate 31. A counterweight 41 is hung on one side of the balancing block 40, and the height of the counterweight hanging is adjustable. The other side of the balancing block is pressed on the third mechanical pneumatic valve 38 through a pressure plate. When the counterweight 41 contacts the bar material in the material rack, the counterweight is lifted upward, and the balancing block 40 tilts toward one end of the third mechanical pneumatic valve 38. The third mechanical pneumatic valve 38 is no longer subjected to the pressure of the pressure plate. The third mechanical pneumatic valve 38 opens and supplies air to the clamping jaw actuator, and the clamping jaw 35 grabs the material and clamps it. When the clamping jaw is clamped in place, the clamping jaw is closed in place, and the pressure rod 43 presses the second mechanical pneumatic valve 37. The second mechanical pneumatic valve 37 supplies air to the lifting mechanism, and the lifting mechanism performs an ascending action.

[0052] The roller gripper mechanism is mounted in the movable slide rail 67 of the lifting mechanism through four groups of rollers 44, and two groups of rollers are fixedly mounted on both ends of the main mounting plate 31 through roller connecting rods 45. In the process of rising and falling, the roller gripper mechanism realizes self-positioning at the position of the limit groove locking structure 68.

[0053] The translation mechanism 5 is mainly composed of a translation actuator 51, a fixed slide rail 52, a hook 53, etc. Figure 8As shown. The translation actuator 51 includes a fixed shaft whose two ends are respectively fixed on the frame and the lifting mechanism base plate through a fixed seat and a movable end sleeved on the fixed shaft, and a hook 53 is arranged on the movable end. The fixed slide rail 52 is fixed on the frame. The hook 53 is two screws installed on the movable end of the translation actuator. The spacing between the two screws can ensure that when the roller gripper mechanism reaches the upper limit position along with the lifting mechanism, the roller connector (i.e., the roller connecting rod 45) can enter the area between the two screws, and then the movable end of the translation actuator drives the roller gripper mechanism to translate to the discharge area through the hook 53, and then returns to the gripping area after the discharge is completed.

[0054] The bar material automatic feeding device of the utility model can be used with a standard material rack and a feeder for automatic feeding. The working principle is:

[0055] Step 1: The operator hoists the standard material rack with materials into the roller table of the rack. Fig. 9 Then push the material rack with material into the material-removing station in the bar material automatic feeding device and lock the material rack. Fig.10 shown.

[0056] Step 2: Start the automatic control program. When there is no material in the hopper of the feeder, the lifting mechanism will descend together with the roller gripper mechanism and the pusher mechanism installed with it. When the material level sensor installed on the gripper mechanism and the pusher mechanism senses the bar material approaching the material rack, the lifting mechanism stops descending and the pilot check valve locks the air path to keep the current position unchanged. Fig.11 shown.

[0057] Step 3: The automatic program controls the pushing mechanism to push the bars in the rack from both sides to the middle, ensuring that the bars to be grabbed are concentrated in the middle area of ​​the rack. Fig.12 shown.

[0058] Step 4: The automatic program controls the gripper mechanism to grab the bars concentrated in the middle area of ​​the rack and clamp them. Then the pusher mechanism returns. Fig.13 shown.

[0059] Step 5: The automatic program controls the lifting mechanism to rise to the upper limit position, ensuring that the slide groove in the lifting mechanism is aligned with the fixed slide groove 54 of the translation mechanism. Fig.14 shown.

[0060] Step 6: The automatic program controls the translation mechanism to pull the roller gripper mechanism with the material into the upper part of the hopper of the feeder, while the lifting mechanism and the pushing mechanism keep the current position unchanged, waiting for the roller gripper mechanism to return to its original position. Fig.15 and Fig.16 shown.

[0061] Step 7: The automatic control program controls the roller gripper mechanism to release the clamping claw, and the bar material falls into the hopper of the feeder. Thus, the automatic feeding of the bar material from the standard material rack to the hopper of the feeder is realized. Fig.17 Then the roller gripper mechanism is automatically brought back to the slideway of the lifting mechanism by the translation mechanism, as shown in Fig.18 When the feeder is out of material again, the automatic control program will execute a series of automatic actions, including descending, pushing, grabbing, ascending, translating to the feeder bin, unloading, and returning, over and over again, thus realizing automatic feeding of the bar feeder of the automated production line, thus fully realizing the fully automated production of the automated production line in the feeding process.

Claims

1. An automatic bar feeding device, characterized in that: It includes a frame and a lifting mechanism and a translation mechanism arranged on the frame, and a pushing mechanism and a roller gripping mechanism are installed on the lifting mechanism; the lifting mechanism includes a base plate arranged on the frame and a lifting actuator and a lifting guide mechanism arranged on the base plate, the movable ends of the lifting actuator and the lifting guide mechanism are connected to the movable slide rail, the pushing mechanism is installed on the movable slide rail, the pushing mechanism has four groups, each group is composed of a group of pushing brackets and a group of pushing actuators, each group of pushing actuators is installed on the pushing brackets, and the pushing brackets are installed in symmetrical positions on the side of the movable slide rail; the roller gripping mechanism includes a main mounting plate and rollers, clamps and a material level sensing mechanism arranged on the main mounting plate, and is installed on one side of the clamp actuator mounting seat There are a first mechanical pneumatic valve, a second mechanical pneumatic valve, a pressure plate for opening the jaws and a pressure rod for closing the jaws. The material level sensing mechanism includes an articulated seat fastened to the main mounting plate and a balancing block connected to the articulated seat by a hinged manner. A counterweight is hung on one side of the balancing block, and the other side is pressed on the third mechanical pneumatic valve through a pressure plate. The roller gripper mechanism is hung on the movable slide rail of the lifting mechanism through a roller, and a limit groove locking structure for automatically positioning and locking the roller gripper mechanism is arranged inside the movable slide rail; the translation mechanism includes a translation actuator and a fixed slide rail fixed on the frame, and the translation actuator includes a fixed shaft whose two ends are respectively fixed to the frame and the lifting mechanism base plate through a fixed seat, and a movable end sleeved on the fixed shaft.

2. The automatic bar feeding device according to claim 1, characterized in that: The distance between two sets of push-material actuators on the same side of the movable slide rail is greater than the width of the standard material rack.

3. The automatic bar feeding device according to claim 1, characterized in that: Two groups of material pushing actuators on the same side of the movable slide rail are connected to each other through a connecting piece.

4. The automatic bar feeding device according to claim 1, characterized in that: The lifting actuator is installed at the middle position of the base plate, and the guide sleeves of the lifting guide mechanism are symmetrically installed on both sides of the lifting actuator.

5. The automatic bar feeding device according to claim 1, characterized in that: The height of the counterweight hanging is adjustable.

6. The automatic bar feeding device according to claim 1, characterized in that: A draw hook is arranged on the movable end of the translation actuator.

7. The automatic bar feeding device according to claim 6, characterized in that: The draw hooks are two screws mounted on the movable ends of the translation actuator.

8. The automatic bar feeding device according to claim 1, characterized in that: The material level sensing mechanism includes a mechanical gravity sensor.

9. The automatic bar feeding device according to claim 8, characterized in that: A pneumatic control loop is arranged between the mechanical gravity sensor and the gripper actuator.

10. The automatic bar feeding device according to claim 1, characterized in that: The rollers are in four groups, and every two groups of rollers are fixedly mounted on the two ends of the main mounting plate through roller connecting rods.

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