Cutting device for machining of metal castings and control method thereof

Abstract

The application relates to a cutting device for metal casting machining, which comprises a cutting machine, a locking lathe, a casting clamp, a leveling assembly and a PLC controller. The casting clamp is used for fixing a metal casting, the locking lathe is used for fixing the casting clamp, three limiting clamps are arranged on the side wall of the casting groove, the locking lathe comprises a rack, the leveling assembly is connected with the top of the rack through a lifting hydraulic rod, the leveling assembly can level the casting clamp, and the PLC controller is connected with the cutting machine, the locking lathe, the casting clamp and the leveling assembly. The application aims at solving the technical problem that the metal casting is cut in the cutting process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal casting processing, in particular to a cutting device for metal casting processing and a control method thereof. BACKGROUND

[0002] In the prior art, after the metal casting is formed in the mold, due to the setting of the pouring hole, the metal casting is usually connected with a piece of excess material after being formed, and the excess material needs to be cut in the metal casting cutting device. Only then the metal casting is considered to be formed. In the existing metal casting cutting device, in order to facilitate the clamping of the metal casting, only two automatic hydraulic clamps are usually provided for clamping. However, the clamping force of the automatic hydraulic clamp is usually set according to the standard and does not need to be manually adjusted. In the cutting work, the cutting of the metal casting by the cutting machine will generate a certain thrust. When the thrust is greater than the friction force of the clamp, the metal casting will start to tilt, causing the cutting machine to cut the tilted metal casting, thereby causing the metal casting body to be cut, and finally the damaged metal casting can only be disposed of, greatly reducing the processing yield.

[0003] Therefore, it is an urgent problem to develop a cutting device for metal casting processing which can solve the technical problem of metal casting damage caused by tilting during cutting. SUMMARY

[0004] To solve the above technical problems, the present application provides a cutting device for metal casting processing, which adopts the following technical scheme:

[0005] A cutting device for metal casting processing, comprising a cutting machine, a locking lathe, a casting clamp, a leveling assembly and a PLC controller. The cutting machine is movable up and down. The casting clamp is used to fix the metal casting. The locking lathe is used to fix the casting clamp. A casting groove is provided in the middle of the casting clamp. The casting groove is of U-shaped structure. Three limiting clamps are provided on the side wall of the casting groove. The three limiting clamps are uniformly arranged on the inner wall of the casting groove in the circumferential direction. The locking lathe comprises a rack. The leveling assembly is connected to the top of the rack through a lifting hydraulic rod. A vertical slide rail is provided on the side of the rack away from the locking lathe. The cutting machine is slidingly connected to the vertical slide rail. The leveling assembly can level the casting clamp. The PLC controller is connected to the cutting machine, the locking lathe, the casting clamp and the leveling assembly, respectively.

[0006] Further, a gyroscope is provided in the casting clamp. The gyroscope can measure the offset angle of the casting tool and send the offset angle data to the PLC controller, so as to obtain the offset condition of the casting clamp.

[0007] Further, the three limiting clamps in the casting clamp are screw rod limiting clamps, the casting clamp is provided with screw holes corresponding to the positions of the three limiting clamps, the screw rod part of the screw rod limiting clamp is matched with the screw hole, the screw rod is provided with an adjusting handle on the side away from the casting clamp, and the side of the screw rod away from the adjusting handle is provided with an L-shaped chuck head connected with the screw rod bearing.

[0008] Further, the locking lathe comprises two automatic hydraulic clamps, the two automatic hydraulic clamps are arranged on the two side edges of the locking lathe perpendicular to the vertical slide rail, and the two automatic hydraulic clamps are used for clamping the casting clamp.

[0009] Further, the locking lathe is provided with a limiting groove, the limiting groove is arranged at the position between the two automatic hydraulic clamps, the depth of the limiting groove is 5 mm, the shape of the limiting groove is proportional to the shape of the casting clamp, and the distance from the inner wall of the limiting groove to the outer edge of the casting clamp is 1 mm.

[0010] Further, the leveling assembly comprises a leveling plate and four hydraulic leveling rods, one side of the hydraulic leveling plate facing the casting clamp is rectangular, the four hydraulic leveling rods are arranged on the side of the leveling plate facing the casting clamp in a corresponding manner according to the frame position of the casting clamp, the four hydraulic leveling rods surround a rectangle, and the four hydraulic leveling rods are individually controlled by a PLC controller.

[0011] The application also provides a control method of the cutting device for metal casting processing, comprising the following steps:

[0012] A, the metal casting is placed in the casting groove of the casting clamp, the screw rod limiting clamp is screwed to clamp the metal casting, the metal casting and the casting clamp form an integral whole, then the casting clamp is placed in the limiting groove of the locking lathe, the two automatic hydraulic clamps detect that the casting clamp is in place, the PLC controller controls the two automatic hydraulic clamps to clamp the casting clamp with a preset clamping force, and the positioning of the metal casting is completed.

[0013] B, metal casting leveling: the PLC controller receives the inclination angle data obtained by the gyroscope in the casting clamp, calculates the length required for the four hydraulic leveling rods to extend according to the inclination angle data, controls the four hydraulic leveling rods to extend so that the inclination angle of the plane formed by the four points at the ends of the four hydraulic leveling rods is the same as the inclination angle data obtained by the gyroscope, controls the extension and retraction of the lifting hydraulic rod so that the four hydraulic leveling rods touch the casting clamp at the same time, and then controls the four hydraulic leveling rods to extend and retract according to the horizontal plane of the locking lathe, thereby completing the leveling of the metal casting;

[0014] C, metal casting cutting: the PLC controller controls the cutting machine to descend and start cutting the metal casting;

[0015] D, metal casting cutting precision control: if the inclination angle of the metal casting and the casting clamp relative to the horizontal plane of the locking lathe is greater than 1° due to the cutting force of the cutting machine, that is, the inclination angle obtained by the gyroscope is greater than 1° when the PLC controller receives it during metal casting cutting, the cutting machine stops cutting immediately and rises to the standby position automatically, the PLC controller starts to execute step B to re-level the metal casting, and after the leveling of the metal casting is completed, step C is executed to complete the cutting of the metal casting.

[0016] After adopting the above technical scheme, the beneficial effects of the present application are:

[0017] 1. In the present application, the casting clamp and the leveling assembly are provided, so that the metal casting can be automatically leveled when it is inclined during cutting, greatly reducing the processing rejection rate of the metal casting.

[0018] 2. In the present application, the gyroscope is provided, which greatly improves the inclination measurement accuracy of the metal casting, thereby accurately grasping the inclination of the metal casting during cutting, and the gyroscope has a small size and can be hidden and installed in a small workpiece without occupying more space.

[0019] 3. In the present application, the lead screw limiting clamp and the L-shaped chuck are provided, so that the casting clamp is easy to adjust and can form an integral whole with the metal casting, facilitating the acquisition of the inclination angle.

[0020] 4. In the present application, the four hydraulic leveling rods are provided, making the leveling work more standard.

[0021] 5. The control method of the present application can keep the metal casting within a suitable inclination range at all times, greatly improving the yield of metal casting cutting processing. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 A structural schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0024] Figure 2 A cutting state schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0025] Figure 3 A cutting machine structural schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0026] Figure 4 A casting clamp structural schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0027] Figure 5 A locking lathe structural schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0028] Figure 6 A leveling assembly structural schematic diagram of a cutting device for metal casting processing provided by the embodiments of the present application.

[0029] Explanation of reference signs:

[0030] 100-cutting machine, 101-vertical slide rail, 200-locking lathe, 201-machine frame, 202-automatic hydraulic clamp, 203-limiting groove, 300-casting clamp, 301-casting groove, 302-limiting clamp, 303-gyroscope, 304-thread hole, 305-adjusting handle, 306-L-shaped chuck, 400-leveling assembly, 401-leveling plate, 402-hydraulic leveling rod, 500-PLC controller. DETAILED DESCRIPTION

[0031] The present application will be more fully understood by the following description of the embodiments, but the specific embodiments given by the applicant should not be regarded as limiting the technical solutions of the present application, and any change to the definition of components or technical features, or formal but not substantial change to the overall structure should be regarded as the protection scope defined by the technical solutions of the present application.

[0032] In the present application, unless otherwise expressly specified or limited, the terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication of two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The present application adopts the following technical solutions to realize:

[0034] As shown in Figure 1 , Figure 2 and Figure 3 , a cutting device for metal casting processing, comprising a cutting machine 100, a locking lathe 200, a casting clamp 300, a leveling assembly 400, a PLC controller 500; the cutting machine 100 can move up and down, the casting clamp 300 is used for fixing the metal casting, the locking lathe 200 is used for fixing the casting clamp 300, a casting groove 301 is arranged in the middle of the casting clamp 300, the casting groove 301 is a U-shaped structure, three limiting clamps 302 are arranged on the side wall of the casting groove 301, the three limiting clamps 302 are arranged uniformly in the circumferential direction of the inner wall of the casting groove 301, the locking lathe 200 comprises a rack 201, the leveling assembly 400 is connected with the top of the rack 201 through a lifting hydraulic rod, a vertical slide rail 101 is arranged on the side of the rack 201 away from the locking machine, the cutting machine 100 is in sliding connection with the vertical slide rail 101, the leveling assembly 400 can level the casting clamp 300, and the PLC controller 500 is connected with the cutting machine 100, the locking lathe 200, the casting clamp 300 and the leveling assembly 400 respectively.

[0035] Because the casting clamp 300 and the leveling assembly 400 are arranged, the metal casting can be automatically leveled when it is inclined during cutting, greatly reducing the processing rejection rate of the metal casting.

[0036] As shown in Figure 4 , a gyroscope 303 is arranged in the casting clamp 300, the gyroscope 303 can measure the deviation angle of the casting tool and send the deviation angle data to the PLC controller 500, so as to obtain the deviation of the casting clamp 300.

[0037] Because the gyroscope 303 is arranged, the inclination measurement accuracy of the metal casting is greatly improved, so that the inclination of the metal casting during cutting can be accurately grasped, and the gyroscope 303 has a small volume and is convenient to hide and install in a small workpiece without occupying more space.

[0038] As Figure 4 shown, the three limiting clamps 302 in the casting clamp 300 are screw rod limiting clamps 302, the casting clamp 300 is provided with a screw hole 304 corresponding to the position of the three limiting clamps 302, the screw rod part of the screw rod limiting clamp 302 is matched with the screw hole 304, the screw rod is provided with an adjusting handle 305 away from the casting clamp 300 side, the screw rod is provided with an L-shaped chuck 306 away from the adjusting handle 305 side, and the L-shaped chuck 306 is connected with the screw rod bearing.

[0039] Because the screw rod limiting clamp 302 and the L-shaped chuck 306 are arranged, the casting clamp 300 is convenient to adjust, and can form an integral whole with the metal casting, so that the inclination angle is obtained conveniently.

[0040] As Figure 5 shown, the locking lathe 200 comprises two automatic hydraulic clamps 202, two automatic hydraulic clamps 202 are arranged on the two sides of the locking lathe 200 perpendicular to the vertical slide rail 101, and two automatic hydraulic clamps 202 are used for clamping the casting clamp 300.

[0041] As Figure 5 shown, the locking lathe 200 is provided with a limiting groove 203, the limiting groove 203 is arranged at the position between the two automatic hydraulic clamps 202, the depth of the limiting groove 203 is 5mm, the shape of the limiting groove 203 is arranged in proportion to the shape of the casting clamp 300, and the distance from the inner wall of the limiting groove 203 to the outer edge of the casting clamp 300 is 1mm.

[0042] As Figure 6 shown, the leveling assembly 400 comprises a leveling plate 041 and four hydraulic leveling rods 402, one side of the hydraulic leveling plate 041 facing the casting clamp 300 is rectangular, four hydraulic leveling rods 402 are arranged on the side of the leveling plate 041 facing the casting clamp 300 according to the frame position of the casting clamp 300, and four hydraulic leveling rods 402 surround a rectangle, and four hydraulic leveling rods 402 are controlled by a PLC controller 500 respectively.

[0043] Because four hydraulic leveling rods 402 are arranged, the leveling work is more standard.

[0044] The application also provides a control method of the cutting device for metal casting processing, comprising the following steps:

[0045] A, metal casting in place: the metal casting is put into the casting groove 301 of the casting clamp 300, the lead screw limiting clamp 302 is screwed to clamp the metal casting, the metal casting and the casting clamp 300 form an integral whole, then the casting clamp 300 is placed in the limiting groove 203 of the locking lathe 200, the two automatic hydraulic clamps 202 detect that the casting clamp 300 is in place, the PLC controller 500 controls the two automatic hydraulic clamps 202 to clamp the casting clamp 300 with a preset clamping force, and the positioning of the metal casting is completed;

[0046] B, metal casting leveling: the PLC controller 500 receives the inclination angle data obtained by the gyroscope 303 in the casting clamp 300, calculates the length required for the four hydraulic leveling rods 402 to extend according to the inclination angle data, controls the four hydraulic leveling rods 402 to extend so that the inclination angle of the plane composed of the four points at the ends of the four hydraulic leveling rods 402 is the same as the inclination angle data obtained by the gyroscope 303, controls the extension and retraction of the lifting hydraulic rod, and stops controlling the extension and retraction of the lifting hydraulic rod when the four hydraulic leveling rods 402 touch the casting clamp 300 at the same time, then controls the four hydraulic leveling rods 402 to extend and retract according to the horizontal plane of the locking lathe 200, and the leveling of the metal casting is completed.

[0047] C, metal casting cutting: the PLC controller 500 controls the cutting machine 100 to descend and start cutting the metal casting.

[0048] D, metal casting cutting precision control: if the inclination angle of the metal casting and the casting clamp 300 relative to the horizontal plane of the locking lathe 200 is greater than 1° due to the cutting force of the cutting machine 100, i.e. the inclination angle obtained by the gyroscope 303 is greater than 1° when the PLC controller 500 receives it during metal casting cutting, the cutting machine 100 stops cutting immediately and rises to the standby position, the PLC controller 500 starts to execute step B to re-level the metal casting, and after the leveling of the metal casting is completed, step C is executed to complete the cutting of the metal casting.

[0049] By using the above control method, the metal casting can be kept in a suitable inclination range at all times, greatly improving the yield of metal casting cutting processing.

[0050] Those skilled in the art should understand that those skilled in the art can realize variations in combination with the prior art and the above embodiments, which are not described here. Such variations do not affect the essential content of the present application, and are not described here.

[0051] The preferred embodiments of the present application have been described. It is to be understood that the application is not limited to the above specific embodiments, and that devices and structures not described in detail should be understood to be implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, still belongs to the scope of protection of the technical solutions of the present application.

Claims

1. A cutting device for machining of metal castings, characterized in that: The system includes a cutting machine, a locking lathe, a casting fixture, a leveling assembly, and a PLC controller. The cutting machine is vertically movable. The casting fixture is used to fix metal castings. The locking lathe is used to fix the casting fixture. The casting fixture has a U-shaped casting groove in the middle. Three limiting clamps are provided on the side wall of the casting groove, and the three limiting clamps are evenly arranged circumferentially on the inner wall of the casting groove. The locking lathe includes a frame. The leveling assembly is connected to the top of the frame via a lifting hydraulic rod. A vertical slide rail is provided on the side of the frame away from the locking lathe. The cutting machine is slidably connected to the vertical slide rail, and the leveling component can level the casting fixture. The PLC controller is connected to the cutting machine, the locking lathe, the casting fixture, and the leveling component. The three limiting clamps in the casting fixture are lead screw limiting clamps. The casting fixture is provided with threaded holes corresponding to the positions of the three limiting clamps. The lead screw part of the lead screw limiting clamp is engaged with the threaded holes. An adjustment handle is provided on the side of the lead screw away from the casting fixture, and an L-shaped chuck is provided on the side of the lead screw away from the adjustment handle. The L-shaped chuck is connected to the lead screw bearing. The locking lathe includes two automatic hydraulic clamps, which are respectively disposed on two sides of the locking lathe perpendicular to the vertical slide rail. The two automatic hydraulic clamps are used to clamp the casting fixture. When the casting fixture is placed on the locking lathe, the two automatic hydraulic clamps automatically clamp the casting fixture according to a preset clamping force. The locking lathe is provided with a limiting groove, which is located between the two automatic hydraulic fixtures. The limiting groove has a depth of 5mm and its shape is proportional to the shape of the casting fixture. The distance from the inner wall of the limiting groove to the outer edge of the casting fixture is 1mm.

2. The cutting apparatus for processing a metal casting according to claim 1, wherein The casting fixture is equipped with a gyroscope, which can measure the offset angle of the casting tool and send the offset angle data to the PLC controller, thereby obtaining the offset status of the casting fixture.

3. The cutting apparatus for processing a metal casting according to claim 1, wherein The leveling assembly includes a leveling plate and four hydraulic leveling rods. The side of the hydraulic leveling plate facing the casting fixture is rectangular. The four hydraulic leveling rods are positioned on the side of the leveling plate facing the casting fixture according to the position of the frame of the casting fixture, and the four hydraulic leveling rods form a rectangle. Each of the four hydraulic leveling rods is individually controlled by a PLC controller.

4. A control method for a cutting apparatus for processing a metal casting based on any one of claims 1 to 3, characterized by, Includes the following steps: A. Metal casting positioning: Place the metal casting into the casting slot of the casting fixture, turn the screw limit clamp to hold the metal casting, so that the metal casting and the casting fixture form a whole. Then place the casting fixture into the limit slot of the locking lathe. Two automatic hydraulic fixtures detect that the casting fixture is in position. The PLC controller controls the two automatic hydraulic fixtures to clamp the casting fixture with a preset clamping force, thus completing the positioning of the metal casting. B. Metal casting leveling: The PLC controller receives the inclination angle data obtained by the gyroscope in the casting fixture, calculates the length required for the extension of the four hydraulic leveling rods according to the inclination angle data, controls the extension of the four hydraulic leveling rods so that the inclination angle of the plane composed of the four points at the ends of the four hydraulic leveling rods is the same as the inclination angle data obtained by the gyroscope, controls the extension and retraction of the lifting hydraulic rod so that the four hydraulic leveling rods touch the casting fixture at the same time, then controls the extension and retraction of the four hydraulic leveling rods according to the horizontal plane of the locking lathe, and completes the leveling of the metal casting; C. Metal casting cutting: The PLC controller controls the descent of the cutting machine to start the cutting of the metal casting; D. Metal casting cutting precision control: If the inclination angle of the metal casting and the casting fixture relative to the horizontal plane of the locking lathe is greater than 1° due to the cutting force of the cutting machine, i.e. the PLC controller receives the inclination angle greater than 1° obtained by the gyroscope during the cutting of the metal casting, the cutting machine stops cutting immediately and rises to the standby position automatically, the PLC controller starts to execute step B to re-level the metal casting, and after completing the leveling of the metal casting, executes step C to complete the cutting of the metal casting.

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