An automated cutting-off device for spheroidal graphite cast iron

Abstract

The application belongs to the technical field of cutting off cast iron parts, and particularly relates to an automatic cutting-off device for nodular cast iron, which comprises a cutting-off table, guide frames and a cutting-off assembly, two groups of the guide frames and the cutting-off assembly are symmetrically arranged on the cutting-off table, the guide frame comprises two symmetrically distributed positioning guide rails, a conveying channel for moving the castings is formed between the two positioning guide rails, the cutting-off assembly is arranged in a casting cutting-off area of the conveying channel, and the cutting-off assembly comprises a hydraulic rod and a U-shaped push plate, the push plate is fixedly connected to an output shaft of the hydraulic rod. In the application, the castings are automatically moved to the casting cutting-off area on the positioning guide rails by the conveying assembly, and the automatic cutting-off action of the cutting-off assembly is matched, so that an automatic process from conveying to cutting off is realized for the castings with narrow space at the gate position, manual intervention is reduced, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting off cast iron parts, in particular to an automatic cutting off device for nodular cast iron. BACKGROUND

[0002] In the production process of nodular cast iron castings, the sprue part of the castings often needs to be separated, such as cutting by saw blade, cutting by hydraulic clamp, and cutting by saw blade or hydraulic clamp. The space at the sprue part of the castings needs to be sufficient, otherwise the saw blade and the hydraulic clamp are difficult to enter the space for operation.

[0003] Therefore, for the castings with small space at the sprue part (similar to the castings in Figure 5 and Figure 6 ), due to the limitations of the above devices, smooth operation cannot be achieved, and therefore an automatic cutting off device for nodular cast iron is proposed to solve the above problems. SUMMARY

[0004] Based on the technical problems existing in the prior art, the present application provides an automatic cutting off device for nodular cast iron.

[0005] The automatic cutting off device for nodular cast iron provided by the present application comprises a cutting off table, guide frames and cutting off assemblies, two groups of guide frames and cutting off assemblies are symmetrically arranged on the cutting off table, the guide frame comprises two symmetrically distributed positioning guide rails, a conveying channel for moving the castings is formed between the two positioning guide rails, the cutting off assembly is arranged in the casting cutting off area of the conveying channel, the cutting off assembly comprises a hydraulic rod and a U-shaped push plate, the push plate is fixedly connected to the output shaft of the hydraulic rod; one end of the positioning guide rail is the feeding end, and the other end is the discharging end; the castings move from the feeding end to the casting cutting off area along the conveying channel between the two positioning guide rails, the hydraulic rod drives the push plate to act, the push plates of the two groups of cutting off assemblies cut the castings at the sprue part on the respective casting cutting off areas, and the middle part of the castings is left in the conveying channel; as the subsequent castings continuously enter, the middle part of the previous castings is pushed out from the discharging end, and the automatic discharging is realized.

[0006] Preferably, the guide frame further comprises not less than one group of screw rod mounting seats, adjusting screws and hand wheels, the screw rod mounting seat is fixedly connected to the top of the cutting off table, and the two screw rod mounting seats of the same group are located at the side of the corresponding positioning guide rail, the adjusting screw is threadedly connected to the screw rod mounting seat, one end of the adjusting screw is rotatably connected to the positioning guide rail, and the other end is fixedly connected to the hand wheel; the adjusting screw is driven to rotate on the screw rod mounting seat by rotating the hand wheel, the adjusting screw pushes the positioning guide rail to move, so that the width of the conveying channel between the two positioning guide rails is adjusted to adapt to castings of different sizes.

[0007] Preferably, the cutting-off assembly further comprises a hydraulic rod fixing seat and a hydraulic rod supporting seat, and the hydraulic rod is fixedly installed on the cutting-off table through the hydraulic rod fixing seat and the hydraulic rod supporting seat; the hydraulic rod fixing seat and the hydraulic rod supporting seat stably support and fix the hydraulic rod, so that the hydraulic rod is kept stable during driving the push plate to cut off, and the cutting-off precision is improved.

[0008] Preferably, the top of the cutting-off table is provided with a blanking port between the two groups of guide frames; the other part of the workpiece after the casting is cut off can fall from the cutting-off table through the blanking port, so that the workpiece is conveniently collected and processed.

[0009] Preferably, the automatic cutting-off device for nodular cast iron further comprises a positioning assembly arranged in the casting cutting-off area, and the positioning assembly comprises guide sleeves, a positioning slide rod and end covers; the two guide sleeves are respectively fixedly connected to the top of the corresponding positioning guide rails, the positioning slide rod is arranged between the two guide sleeves, and the two end covers are respectively detachably fixed to the two ends of the positioning slide rod; the positioning slide rod plays a role of positioning and guiding the casting moving to the casting cutting-off area, so that the casting is prevented from deviating during the cutting-off process; the end covers can prevent the positioning slide rod from falling off from the guide sleeves, and the detachable end covers facilitate the maintenance or replacement of the positioning slide rod; and when the width of the conveying channel is adjusted, the positioning slide rod will slide in the guide sleeves correspondingly.

[0010] Preferably, the automatic cutting-off device for nodular cast iron further comprises a conveying assembly fixedly connected to the cutting-off table and located below the corresponding guide frame; the casting entering the guide frame can contact the conveying belt on the conveying assembly; the conveying belt drives the casting in contact therewith to move in the conveying channel of the guide frame, so that the automatic conveying of the casting is realized without manual pushing, and the degree of automation is improved.

[0011] Preferably, the positioning guide rail on the side of the guide frame away from the cutting-off assembly is fixedly connected with a discharging guide plate close to the blanking port; the discharging guide plate is arc-shaped in cross section and has elasticity; when the other part of the workpiece after the casting is cut off moves to the discharging guide plate, the discharging guide plate guides the casting to the blanking port; the arc-shaped and elastic discharging guide plate can also buffer the kinetic energy of the part of the workpiece, so that the collision damage to the casting is reduced.

[0012] Preferably, the automatic cutting-off device for nodular cast iron further comprises a detection system and a control module, and the detection system comprises:

[0013] a force acquisition module for monitoring the pressure data in the cutting-off process in real time;

[0014] a displacement acquisition module for monitoring the displacement data of the push plate in real time;

[0015] a position acquisition module for detecting the to-position state of the push plate;

[0016] The control module is configured to receive and process data collected by the force acquisition module and the displacement acquisition module in real time, determine the cutting-off state based on the force-displacement change characteristics, and control the hydraulic rod to retract when the cutting-off is determined to be completed; when an abnormal pressure or displacement is detected, the control device performs a shutdown or alarm operation.

[0017] Preferably, the specific execution steps of the control module for determining the cutting-off state based on the force-displacement change characteristics include:

[0018] S1, acquiring the force value F_current and the displacement value at the current time in real time;

[0019] S2, recording the maximum force value F_max during the entire pushing process;

[0020] S3, determining the completion of cutting-off: if it is detected that the current force value satisfies F_current≤(F_max-ΔF_th), it is determined that the sprue has been cut off, and the hydraulic rod is controlled to retract; wherein ΔF_th is a preset force drop threshold;

[0021] S4, determining an abnormality: if the current displacement value reaches or exceeds the preset maximum safe stroke, and the current force value does not drop, it is determined that the cutting-off is not completed, and the control module sends an alarm signal.

[0022] Preferably, the specific steps of the control module for determining an abnormality further include:

[0023] If it is detected that the current displacement value has exceeded the normal cutting-off stroke, and the current force value is always lower than the preset minimum force threshold, it is determined that there is no casting or missing, and the control module controls the device to shut down and alarm; if it is detected that the current force value reaches or exceeds the system safety force limit, the hydraulic system is immediately controlled to be depressurized and shut down to alarm, so as to protect the equipment.

[0024] Compared with the prior art, the present application provides an automatic cutting-off device for nodular cast iron, which has the following beneficial effects:

[0025] 1. An automatic cutting-off device for nodular cast iron, which drives the casting to automatically move to the casting cutting-off area on the positioning guide rail through the conveying assembly, cooperates with the automatic cutting-off action of the cutting-off assembly, realizes the full-automatic process from conveying to cutting-off of the casting with a small space at the sprue position, reduces manual intervention, and improves production efficiency.

[0026] 2. An automatic cutting-off device for nodular cast iron, which can adapt to castings of different sizes by adjusting the distance between the positioning guide rails through the adjusting screw, thereby expanding the application range of the device.

[0027] 3. The automatic cutting device for nodular cast iron, the arrangement of the blanking opening and the discharging guide plate enables the cut workpiece to smoothly fall down and be collected, simplifying the subsequent processing procedure, and the arc-shaped and elastic discharging guide plate can buffer the kinetic energy of the workpiece, reduce the collision damage and ensure the quality of the castings.

[0028] 4. The automatic cutting device for nodular cast iron, the detection system can monitor the pressure, displacement and position data in the cutting process in real time, the control module can timely judge the cutting state and abnormal conditions and execute the stop or alarm operation when problems occur, avoiding equipment damage and accidents. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a whole structure schematic view of the automatic cutting device for nodular cast iron proposed in the application.

[0030] Figure 2 It is a guide frame structure schematic view of the automatic cutting device for nodular cast iron proposed in the application.

[0031] Figure 3 It is a conveying assembly structure schematic view of the automatic cutting device for nodular cast iron proposed in the application.

[0032] Figure 4 It is a positioning assembly structure schematic view of the automatic cutting device for nodular cast iron proposed in the application.

[0033] Figure 5 It is a schematic view of the cut workpiece of the cutting assembly of the automatic cutting device for nodular cast iron proposed in the application.

[0034] Figure 6 It is a schematic view of the cut workpiece of the cutting assembly of the automatic cutting device for nodular cast iron proposed in the application.

[0035] In the figure: 1, cutting table; 2, guide frame; 201, positioning guide rail; 202, screw rod mounting seat; 203, adjusting screw rod; 204, hand wheel; 3, cutting assembly; 301, hydraulic rod; 302, push plate; 303, hydraulic rod fixing seat; 304, hydraulic rod support seat; 4, positioning assembly; 401, guide sleeve; 402, positioning slide rod; 403, end cover; 5, conveying assembly; 6, conveying belt; 7, blanking opening; 8, discharging guide plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] Referring to Figures 1-6 An automatic cutting device for ductile cast iron includes a cutting table 1, guide frames 2 and cutting assemblies 3, two groups of guide frames 2 and cutting assemblies 3 are symmetrically arranged on the cutting table 1, the guide frame 2 includes two symmetrically distributed positioning guide rails 201, a conveying channel for moving the castings is formed between the two positioning guide rails 201, the cutting assembly 3 is arranged in the casting cutting area of the conveying channel, the cutting assembly 3 includes a hydraulic rod 301 and a U-shaped push plate 302, the push plate 302 is fixedly connected to the output shaft of the hydraulic rod 301.

[0039] In use, one end of the positioning guide rail 201 is the feeding end, and the other end is the discharging end, the castings move from the feeding end to the casting cutting area along the conveying channel between the two positioning guide rails 201, the hydraulic rod 301 drives the push plate 302 to act, the push plates 302 of the two groups of cutting assemblies 3 respectively cut the castings in the respective casting cutting areas at the sprue part, and the middle part of the castings is left in the conveying channel, and as the subsequent castings continuously enter, the middle part of the previous castings will be pushed out from the discharging end, and the automatic discharging is realized. Figure 5 And Figure 6 The cutting of two different types of castings shown in the and can be realized by using the present application.

[0040] In the present application, the guide frame 2 further includes not less than one group of screw rod mounting seats 202, adjusting screws 203 and hand wheels 204, the screw rod mounting seat 202 is fixedly connected to the top of the cutting table 1, and the two screw rod mounting seats 202 of the same group are respectively located at the side of the corresponding positioning guide rail 201, the adjusting screw 203 is threadedly connected to the screw rod mounting seat 202, one end of the adjusting screw 203 is rotatably connected to the positioning guide rail 201, and the other end is fixedly connected to the hand wheel 204.

[0041] In use, the adjusting screw 203 is driven to rotate on the screw rod mounting seat 202 by rotating the hand wheel 204, the adjusting screw 203 pushes the positioning guide rail 201 to move, so as to adjust the width of the conveying channel between the two positioning guide rails 201, so as to adapt to castings of different sizes.

[0042] The cutting assembly 3 further comprises a hydraulic rod fixing seat 303 and a hydraulic rod supporting seat 304, and the hydraulic rod 301 is fixedly installed on the cutting table 1 through the hydraulic rod fixing seat 303 and the hydraulic rod supporting seat 304.

[0043] When in use, the hydraulic rod fixing seat 303 and the hydraulic rod supporting seat 304 can stably support and fix the hydraulic rod 301, so that the cutting precision is improved.

[0044] Further, the cutting table 1 is provided with a discharging port 7 at the top, and the discharging port 7 is located between the two groups of guide frames 2.

[0045] When in use, the other part of the workpiece after the casting is cut can fall from the cutting table 1 through the discharging port 7, so that the workpiece can be conveniently collected and processed.

[0046] Further, the automatic cutting device for nodular cast iron further comprises a positioning assembly 4 arranged in the casting cutting area, and the positioning assembly 4 comprises a guide sleeve 401, a positioning slide rod 402 and an end cover 403.

[0047] When in use, the positioning slide rod 402 can position and guide the casting moving to the casting cutting area, so that the casting is prevented from deviating during the cutting process, the end cover 403 can prevent the positioning slide rod 402 from falling off from the guide sleeve 401, the detachable end cover 403 can facilitate the maintenance or replacement of the positioning slide rod 402, and when the width of the conveying channel is adjusted, the positioning slide rod 402 will slide in the guide sleeve 401 correspondingly.

[0048] Further, the automatic cutting device for nodular cast iron further comprises a conveying assembly 5, and the conveying assembly 5 is fixedly connected to the cutting table 1 and located below the corresponding guide frame 2.

[0049] It should be noted that the conveying assembly 5 in the present application includes but is not limited to common conveying equipment such as a belt conveyor, and in the present embodiment, the conveying assembly 5 is a belt conveyor.

[0050] When in use, the conveying belt 6 drives the casting in contact with the conveying belt 6 to move in the conveying channel of the guide frame 2, so that the automatic conveying of the casting is realized, manual pushing is not needed, and the degree of automation is improved.

[0051] Further, the positioning guide rail 201 on the side of the guide frame 2 away from the cutting assembly 3 is fixedly connected with a discharging guide plate 8 close to the blanking opening 7, the discharging guide plate 8 is arc-shaped in cross section and has elasticity;

[0052] In use, when the other part of the cast after being cut is moved to the discharging guide plate 8, the discharging guide plate 8 guides the cast to the blanking opening 7, and the arc-shaped and elastic discharging guide plate 8 can also buffer the kinetic energy of the part of the workpiece, thereby reducing the collision damage to the cast.

[0053] In another embodiment of the present application, the automatic cutting device for nodular cast iron further comprises a detection system and a control module, the detection system comprises:

[0054] A force acquisition module is installed at the connection between the piston rod of the hydraulic rod 301 and the push plate 302, for real-time monitoring of pressure data in the cutting process;

[0055] A displacement acquisition module is integrated in the hydraulic rod 301, for real-time monitoring of displacement data of the push plate 302;

[0056] A position acquisition module is installed at the initial position and the preset cutting completion position of the push plate 302, for detecting the in-place state of the push plate 302;

[0057] The input end of the control module is electrically connected with the output ends of the force acquisition module, the displacement acquisition module and the position acquisition module, and the output end of the control module is electrically connected with the control end of the hydraulic rod 301;

[0058] The control module is configured to: receive and process the data collected by the force acquisition module and the displacement acquisition module in real time; judge the cutting state based on the force-displacement change characteristics, and control the hydraulic rod 301 to retreat when it is determined that the cutting is completed; when detecting abnormal pressure or displacement, the control device performs a shutdown or alarm operation;

[0059] It should be noted that the force acquisition module can be a strain gauge type force sensor or other equipment capable of real-time monitoring of pressure data in the cutting process, the displacement acquisition module can be a magnetostrictive displacement sensor or other equipment capable of real-time monitoring of displacement data of the push plate 302, the position acquisition module can be a proximity switch or other equipment capable of real-time monitoring of the in-place state of the push plate 302, and the control module is an embedded controller (such as an STM32 series), so the force acquisition module, the displacement acquisition module, the position acquisition module and the control module are not specifically limited here and can be selected according to actual needs.

[0060] Further, the specific execution steps of the control module for judging the cutting state based on the force-displacement change characteristics include:

[0061] S1, real-time acquisition of the force value F_current and displacement value S_current at the current time;

[0062] S2, record the maximum force value F_max during the entire advancing process;

[0063] S3, determine the completion of cutting: if the current force value satisfies F_current≤(F_max-ΔF_th), it is determined that the gate has been cut off, and the hydraulic rod 301 is controlled to retreat; wherein, ΔF_th is a preset force drop threshold;

[0064] S4, determine the abnormality: if the current displacement value S_current reaches or exceeds the preset maximum safe stroke S_max, and the current force value F_current does not drop, it is determined that the cutting is not completed, and the control module sends an alarm signal.

[0065] In the present application, the specific steps of the control module determining the abnormality further comprise:

[0066] If it is detected that the current displacement value S_current has exceeded the normal cutting stroke S_normal, and the current force value F_current is always lower than the preset minimum force threshold F_th_min, it is determined that there is no casting or missing, and the control module controls the device to stop and alarm; if it is detected that the current force value F_current reaches or exceeds the system safe force limit F_safe, the hydraulic system is immediately controlled to be depressurized and stopped to alarm, so as to protect the equipment.

[0067] Working principle:

[0068] The casting enters from the feeding end of the positioning guide rail 201, the conveying belt 6 is operated to drive the casting to move along the conveying channel between the two positioning guide rails 201, the hand wheel 204 is rotated to adjust the position of the positioning guide rail 201 through the adjusting screw 203, and the width of the conveying channel is changed to adapt to the size of the casting;

[0069] When the casting moves to the casting cutting area, the positioning slide rod 402 guides the casting, and the hydraulic rod 301 drives the push plate 302 to act, and the two groups of cutting assemblies 3 cut the casting at the gate part through the push plate 302 respectively;

[0070] After cutting, the middle part of the casting is pushed out from the discharge end with the subsequent casting; the other part of the workpiece is guided to the discharge port 7 through the discharge guide plate 8 and falls down;

[0071] In the detection system, the force acquisition module monitors the cutting pressure, the displacement acquisition module monitors the displacement of the push plate 302, the position acquisition module detects the to-position state of the push plate 302, the control module receives and processes these data, and judges the cutting state based on the force-displacement change: when the current force value is less than or equal to the difference between the maximum force value and the force drop threshold value, it is determined that the cutting is completed, and the hydraulic rod 301 is controlled to retreat; if the displacement reaches the maximum safe stroke but the force does not drop, or the displacement exceeds the normal stroke but the force is lower than the minimum threshold value, or the force reaches the safe force limit, the control module will make the device stop or alarm.

[0072] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An automated cutting-off device for spheroidal graphite cast iron, comprising a cutting-off table (1), a guide frame (2) and a cutting-off assembly (3), characterized in that, Two groups of the guide frame (2) and the cutting assembly (3) are symmetrically arranged on the cutting table (1), the guide frame (2) comprises two symmetrically distributed positioning guide rails (201), a conveying channel for the movement of the casting is formed between the two positioning guide rails (201), the cutting assembly (3) is arranged in the casting cutting area of the conveying channel, the cutting assembly (3) comprises a hydraulic rod (301) and a U-shaped push plate (302), the push plate (302) is fixedly connected to the output shaft of the hydraulic rod (301). The cutting assembly (3) further comprises a hydraulic rod fixing seat (303) and a hydraulic rod supporting seat (304), the hydraulic rod (301) is fixedly installed on the cutting table (1) through the hydraulic rod fixing seat (303) and the hydraulic rod supporting seat (304), and further comprises a detection system and a control module, the detection system comprises: a force acquisition module, used for monitoring the pressure data in the cutting process in real time; a displacement acquisition module, used for monitoring the displacement data of the push plate (302) in real time; a position acquisition module, used for detecting the in-place state of the push plate (302); the control module is configured to: receive and process the data acquired by the force acquisition module and the displacement acquisition module in real time; judge the cutting state based on the force-displacement change characteristics, and control the hydraulic rod (301) to retreat when it is determined that the cutting is completed, and control the device to execute the shutdown or alarm operation when an abnormal pressure or displacement is detected, and the specific execution steps comprise: S1, acquiring the force value F_current and the displacement value at the current time in real time; S2, recording the maximum force value F_max in the entire advancing process; S3, judging the cutting completion: if it is detected that the force value at the current time satisfies F_current≤(F_max-ΔF_th), it is determined that the sprue has been cut off, and the hydraulic rod (301) is controlled to retreat; wherein ΔF_th is a preset force drop threshold; S4, judging the abnormality: if the current displacement value reaches or exceeds the preset maximum safe stroke, and the force value at the current time does not drop, it is determined that the cutting is not completed, and the control module sends an alarm signal, if it is detected that the current displacement value has exceeded the normal cutting stroke, and the force value at the current time is always lower than the preset minimum force threshold, it is determined that there is no casting or missing, and the control module controls the device to stop and alarm; if it is detected that the force value at the current time reaches or exceeds the system safety force limit, the hydraulic system is immediately controlled to be depressurized and stopped to alarm, so as to protect the equipment.

2. The automatic cutting-off device for nodular cast iron according to claim 1, characterized in that, The guide frame (2) further comprises not less than one group of screw rod mounting seats (202), adjusting screws (203) and hand wheels (204), the screw rod mounting seat (202) is fixedly connected to the top of the cutting table (1), and the two screw rod mounting seats (202) of the same group are respectively located at the side of the corresponding positioning guide rail (201), the adjusting screw (203) is threadedly connected to the screw rod mounting seat (202), one end of the adjusting screw (203) is rotatably connected to the positioning guide rail (201), and the other end is fixedly connected to the hand wheel (204).

3. The automated cutting-off apparatus of nodular cast iron according to claim 1, characterized in that, The top of the cutting table (1) is provided with a blanking port (7), and the blanking port (7) is located between the two groups of guide frames (2).

4. The automatic cutting-off device for nodular cast iron according to claim 2, characterized in that, The positioning assembly (4) is arranged at the cutting area of the casting, and comprises a guide sleeve (401), a positioning slide rod (402) and an end cover (403). The two guide sleeves (401) are respectively fixedly connected to the top of the corresponding positioning guide rail (201), the positioning slide rod (402) is arranged between the two guide sleeves (401), and the two end covers (403) are respectively detachably fixed to the two ends of the positioning slide rod (402).

5. The automated cutting-off apparatus of nodular cast iron according to claim 1, characterized in that, The conveying assembly (5) is fixedly connected to the cutting table (1) and located below the corresponding guide frame (2), and the casting entering the guide frame (2) can contact the conveying belt (6) on the conveying assembly (5).

6. The automated cutting-off apparatus of nodular cast iron according to claim 3, characterized in that, The positioning guide rail (201) on the side, away from the cutting assembly (3), of the guide frame (2) is fixedly connected with a discharging guide plate (8) close to the discharging opening (7), the cross section of the discharging guide plate (8) is arc-shaped, and the discharging guide plate (8) is elastic.

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