A double-station cutting device and cutting method for nuclear zirconium alloy pipes

Abstract

The application discloses a double-station cutting device for nuclear zirconium alloy pipes, which comprises a wet sawing machine and a chipless rotary cutting machine arranged side by side. The wet sawing machine comprises a bed base, and a quick-mounting V-shaped clamp and an infeed assembly are arranged on the bed base. The chipless rotary cutting machine comprises a main machine base, and a front air clamp, a rear air clamp and a cutting head are arranged on the main machine base. A bridge is further arranged on the main machine base. A moving assembly is arranged below the main machine base. An upper feeding assembly is arranged on the front side of the wet sawing machine, and a lower discharging assembly is arranged on the rear side of the chipless rotary cutting machine. In addition, the application further provides a double-station cutting method for nuclear zirconium alloy pipes, which is used for wet sawing and chipless rotary cutting of the pipes. The double-station cutting device is composed of the wet sawing machine and the chipless rotary cutting machine arranged side by side. Two cutting modes are realized by one device, the compatibility is high, the switching is convenient, the equipment conversion time is reduced, the labor intensity of workers is significantly reduced, and the production efficiency and product quality are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe cutting, and particularly relates to a double-station cutting device and a cutting method for nuclear zirconium alloy pipes. BACKGROUND

[0002] To meet the harsh working condition requirements in a nuclear reactor, nuclear zirconium alloy pipes are generally formed by adopting a multi-pass cold rolling method on a cold rolling pipe machine. This method has the advantages of large single-pass deformation (about 60% to 80%) and high production efficiency. However, the zirconium chips generated during the cutting process are flammable, which requires that the rolled zirconium alloy pipes be safely and timely cut, and the cutting end quality be ensured without serious burrs or reduced diameter.

[0003] In actual production, the same rolling machine is often used to replace the work dies to roll zirconium alloy pipes of different specifications. To prevent the zirconium chips from catching fire during cutting, a wet sawing method is generally adopted. For larger zirconium alloy pipes (Φout> 15 mm), the wet sawing method is relatively suitable because the pipes are not prone to deformation during sawing due to their large rigidity. However, for smaller zirconium alloy pipes (Φout≤ 15 mm), the sawing process has poor compatibility, and small-size saw blades need to be replaced before sawing. Even so, large burrs, reduced diameter, or sawing deviation may still occur, and the end surface quality is difficult to guarantee. Meanwhile, the generated chips are more, which causes great safety risks and cleaning inconvenience.

[0004] Therefore, the zirconium alloy pipe cutting technical field currently lacks a cutting device that can simultaneously consider different specifications of zirconium alloy pipes and adopt a matching cutting method for different specifications of pipes, while solving the safety risks and cutting quality problems in the cutting of smaller specifications of pipes. SUMMARY

[0005] The technical problem to be solved by the application is to provide a double-station cutting device for nuclear zirconium alloy pipes to solve the above problems in the prior art. The device is composed of a wet sawing machine and a chipless rotary cutting machine arranged side by side to form a double-station cutting device. One device realizes two cutting methods, and the cutting device has wide coverage, strong compatibility, and convenient switching. During production, the wet sawing or chipless rotary cutting method suitable for different specifications of zirconium alloy pipes can be selected to cut larger specifications of zirconium alloy pipes by the wet sawing method and smaller specifications of zirconium alloy pipes by the chipless rotary cutting method. This greatly reduces the equipment conversion time, significantly reduces the labor intensity of workers, and improves the production efficiency and product quality.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a double-station cutting device for nuclear zirconium alloy pipes, characterized in that the device comprises a wet sawing machine and a chipless rotary cutting machine arranged side by side, the wet sawing machine comprises a bed base, the bed base is provided with a quick-mounting V-shaped clamp and an infeed assembly, the chipless rotary cutting machine comprises a main machine base, the main machine base is provided with a front air clamp, a rear air clamp and a cutting head, the main machine base is further provided with a bridge, the main machine base is provided below with a moving assembly, the wet sawing machine is provided at the front side with a feeding assembly, and the chipless rotary cutting machine is provided at the rear side with a discharging assembly.

[0007] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the bed base is provided with a protective cover.

[0008] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the wet sawing machine further comprises a cooling liquid circulating assembly and a chip collecting assembly.

[0009] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the moving assembly comprises a moving bracket arranged below the main machine base and a slide rail for moving the moving bracket, and the moving bracket is provided with a positioning pin.

[0010] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the bridge adopts a V-shaped groove structure, and the surface of the V-shaped groove structure is paved with a nylon plate.

[0011] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the feeding assembly comprises a feeding V-shaped groove and a conveying belt.

[0012] The double-station cutting device for nuclear zirconium alloy pipes is characterized in that the discharging assembly comprises a discharging V-shaped groove, a material turning assembly and a storage rack.

[0013] In addition, the present application provides a method for double-station cutting of nuclear zirconium alloy pipes, characterized in that the method comprises the following steps:

[0014] Step one: align the bridge of the wet sawing machine with the bridge of the chipless rotary cutting machine, and fix the chipless rotary cutting machine to obtain a double-station wet cutting device;

[0015] Step two: feed the pipe into the feeding assembly of the double-station cutting device obtained in step one, clamp the pipe through the quick-mounting V-shaped clamp after passing through the quick-mounting V-shaped clamp and the bridge, then start wet sawing by using the wet sawing machine to obtain a wet sawed pipe;

[0016] Step three: convey the sawed pipe obtained in step two to the discharging assembly through the bridge, and then turn the sawed pipe into the storage rack by using the material turning cylinder.

[0017] Step four, align the feeding assembly with the chipless rotary cutting machine, and fix the chipless rotary cutting machine to obtain a double-station chipless rotary cutting device;

[0018] Step five, send the pipe into the feeding assembly of the double-station chipless rotary cutting device obtained in step four, the pipe passes through the quick-mounting V-shaped clamp, the front air clamp and the rear air clamp, and then the pipe is clamped by the front air clamp and the rear air clamp, and then the chipless rotary cutting machine starts to cut, and a chipless rotary cut pipe is obtained;

[0019] Step six, transport the chipless rotary cut pipe obtained in step five to the discharging assembly, and then use the turnover air cylinder to turn the sawed pipe into the storage rack.

[0020] The method has the characteristics that when the outer diameter of the pipe is greater than 15 mm, steps one to three are used for wet sawing, and when the outer diameter of the pipe is less than or equal to 15 mm, steps four to six are used for chipless rotary cutting. According to the present application, different cutting methods are selected according to the outer diameter of the pipe, so that the production efficiency and product quality are improved.

[0021] The method has the characteristic that cooling liquid is added to the zirconium chips generated in the wet sawing process in step two. The present application prevents the zirconium chips from catching fire by adding cooling liquid to the zirconium chips.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. The present application comprises a double-station cutting device by arranging the wet sawing machine and the chipless rotary cutting machine side by side, so that two cutting methods are realized by one device, the cutting range of the pipe is wide, the compatibility is strong, and the switching is convenient. In the production process, the appropriate wet sawing or chipless rotary cutting method can be selected according to different specifications of zirconium alloy pipes, so that the wet sawing method is used to cut the larger specification zirconium alloy pipes, and the chipless rotary cutting method is used to cut the smaller specification zirconium alloy pipes. The conversion time of the equipment is greatly reduced, the labor intensity of the workers is significantly reduced, and the production efficiency and product quality are improved.

[0024] 2. The present application adjusts the position of the chipless rotary cutting machine by setting the moving assembly, so that the cutting heads of the wet sawing machine and the chipless rotary cutting machine are aligned or aligned with the bridge, and the double-station cutting is realized. The zirconium alloy pipe after rolling is conveyed to the wet sawing machine or the chipless rotary cutting machine for cutting by setting the feeding assembly, and the cut zirconium alloy pipe is collected by the discharging assembly.

[0025] 3. The present application effectively solves the problems of poor compatibility, inconvenient switching, too many zirconium chips when sawing small specification zirconium alloy pipes, difficult cleaning and high safety risk in the existing zirconium alloy pipe cutting technology, and has the advantages of good compatibility, convenient switching, no chips when cutting small pipes, easy cleaning and small safety risk.

[0026] The technical solutions of the present application are described in further detail below with reference to the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Fig. 1 is a structural schematic diagram of a double-station cutting device for nuclear zirconium alloy pipes according to the present application.

[0028] Figure 2 Fig. 2 is a schematic diagram of the connection relationship between a wet sawing machine and a bridge in the double-station cutting device according to the present application.

[0029] Figure 3 Fig. 3 is a photograph of the cut end surface of a wet sawing pipe obtained in step two in Example 2 of the present application.

[0030] Figure 4 Fig. 4 is a photograph of the cut end surface of a chipless rotary cutting pipe obtained in step five in Example 2 of the present application.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 1 - wet sawing machine; 1-1 - bed base; 1-2 - quick-mounting V-shaped clamp;

[0033] 1-3 - feed assembly; 1-4 - protective cover; 1-5 - cooling liquid circulating assembly;

[0034] 1-6 - chip collecting assembly; 2 - chipless rotary cutting machine; 2-1 - main machine base;

[0035] 2-2 - front air clamp; 2-3 - rear air clamp; 2-4 - cutting head;

[0036] 3 - bridge; 4 - moving assembly; 4-1 - moving support;

[0037] 4-2 - slide rail; 6 - feeding assembly; 6-1 - feeding V-shaped groove;

[0038] 7 - discharging assembly; 7-1 - discharging V-shaped groove. DETAILED DESCRIPTION

[0039] A double-station cutting device for nuclear zirconium alloy pipes according to the present application is described in detail through Example 1.

[0040] As Figure 1 and Figure 2As shown, the double-station cutting device for nuclear zirconium alloy pipes of the embodiment comprises a wet sawing machine 1 and a chipless rotary cutting machine 2 arranged side by side, the wet sawing machine 1 comprises a bed base 1-1, the bed base 1-1 is provided with a quick-mounting V-shaped clamp 1-2 and an infeed assembly 1-3, the chipless rotary cutting machine 2 comprises a main machine base 2-1, the main machine base 2-1 is provided with a front air clamp 2-2, a rear air clamp 2-3 and a cutting head 2-4, the main machine base 2-1 is further provided with a bridge 3, the main machine base 2-1 is provided below with a moving assembly 4, the wet sawing machine 1 is provided at the front side with a feeding assembly 6, and the chipless rotary cutting machine 2 is provided at the rear side with a discharging assembly 7.

[0041] It should be noted that the double-station cutting device is composed of the wet sawing machine 1 and the chipless rotary cutting machine 2 arranged side by side, and in the production process, the suitable wet sawing or chipless rotary cutting mode can be selected according to different specifications of zirconium alloy pipes, which greatly reduces the equipment conversion time, significantly reduces the labor intensity of workers, improves the production efficiency and product quality, the pipe is clamped by the quick-mounting V-shaped clamp 1-2 arranged on the bed base 1-1, which ensures the stability of sawing, the pipe is sawed by the infeed assembly 1-3, the pipe is clamped by the front air clamp 2-2 and the rear air clamp 2-3 arranged on the main machine base 2-1, which ensures the stability of rotary cutting, the pipe is rotary cut by the cutting head 2-4, the pipe sawed by the wet sawing machine 1 is transported to the discharging assembly 7 through the bridge 3, the position of the chipless rotary cutting machine 2 is adjusted by the moving assembly 4, the cutting heads 2-4 of the wet sawing machine 1 and the chipless rotary cutting machine 2 are aligned or aligned with the bridge 3, the double-station cutting is realized, the rolled zirconium alloy pipe is conveyed to the wet sawing machine 1 or the chipless rotary cutting machine 2 through the feeding assembly 6 for cutting, and the cut zirconium alloy pipe is collected by the discharging assembly 7.

[0042] It should be noted that the infeed assembly 1-3 adopts a slide rail down-pressing type infeed, the infeed mode is oil pressure driven, the slide rail 4-2 is guided and the infeed stroke and infeed speed are adjustable, the quick-mounting V-shaped clamp 1-2 adopts two sets of front and rear, i.e. one set of quick-mounting V-shaped clamp 1-2 at the feeding and discharging end, which ensures that the pipe does not shake and rotate during cutting, so that the quality of the cutting end is stable.

[0043] It should be noted that the cutting head 2-4 adopts a chipless rotary cutting form, the infeed mode is a gas pressure driven three-piece cutting knife simultaneously radially extruding the pipe, the infeed stroke and infeed speed are adjusted by a damping cylinder, the cutting head 2-4 is provided with a safety guard to prevent foreign matter from flying out and extruding to cause harm to the operator, the front air clamp 2-2 and the rear air clamp 2-3 are pneumatic clamps, which are respectively installed on both sides of the cutting knife, and the clamping force can be adjusted by adjusting the air pressure.

[0044] AsFigure 1 As shown in the drawings, in the embodiment, the bed base 1-1 is provided with a protective cover 1-4. The protective cover 1-4 is used to protect the wet process, the support of the protective cover 1-4 is made of stainless steel material, the periphery is surrounded by transparent organic glass, the operating side is additionally provided with a double door for facilitating the replacement of spare parts, the bed base 1-1 is a whole welded bed base 1-1, the center height is adjusted by the adjustable pad iron, the feed assembly 1-3 is matched with the main shaft rotating device, two speed control is adopted, and the pipe can be automatically switched when cutting different pipes.

[0045] As shown in the drawings, Figure 1 In the embodiment, the wet sawing machine 1 further comprises a cooling liquid circulating assembly 1-5 and a cutting chip collecting assembly 1-6. The cooling liquid circulating assembly 1-5 is used for cooling and lubrication when cutting the pipe, and prevents the cutting chip from catching fire. The cooling liquid pump is additionally provided with a side branch, and a water gun is connected for washing the cutting chip on the cutting table. The cutting chip collecting device is used for collecting the cutting chip generated during cutting, and ensures that the cutting chip falls into the cutting chip collecting device during pipe cutting, so that the cutting chip is always soaked in water.

[0046] As shown in the drawings, Figure 1 and Figure 2 In the embodiment, the moving assembly 4 comprises a moving support 4-1 arranged below the main machine base 2-1, and a sliding rail 4-2 for moving the moving support 4-1. The moving support 4-1 is provided with a positioning pin. The wet sawing machine 1 is moved by arranging the sliding rail 4-2 for moving the moving support 4-1, so as to realize the switching of the double stations. The moving support 4-1 moved to the accurate position is fixed by arranging the positioning pin, so as to ensure the cutting effect.

[0047] In the embodiment, the bridge 3 adopts a V-shaped groove structure, and the surface of the V-shaped groove structure is paved with a nylon plate. The nylon plate is paved to prevent the surface from being scratched when the pipe passes through, and the bridge 3 realizes the supporting and guiding effect on the passing pipe.

[0048] In the embodiment, the feeding assembly 6 comprises a feeding V-shaped groove 6-1 and a conveying belt. The feeding V-shaped groove 6-1 support is welded by adopting square steel, the upper end is of a V-shaped material structure, the conveying belt is of a V-shaped belt, and the V-shaped belt is driven by a variable frequency motor to convey the pipe.

[0049] In the embodiment, the discharging assembly 7 comprises a discharging V-shaped groove 7-1, a material turning assembly and a storage rack. The discharging V-shaped groove 7-1 is composed of a synchronous belt, the variable frequency motor drives the V-shaped belt to convey the pipe, the pipe cut off is detected by the rear end detection element, the material turning assembly is driven by a cylinder to drive a hook-shaped material pushing mechanism to put the pipe cut off into the storage rack, and the storage rack is welded by square steel, and the upper end is paved with a nylon plate to avoid scratching the surface of the pipe.

[0050] The double-station cutting method for nuclear zirconium alloy pipes of the present application is described in detail through Example 2.

[0051] Example 2

[0052] This example includes the following steps:

[0053] Step one, when the rolling mill outputs zirconium alloy pipes with a diameter of 18 mm, align the wet sawing machine 1 with the bridge 3, and fix the main machine base 2-1 to obtain a double-station wet sawing device;

[0054] Step two, send the pipe into the double-station wet sawing device obtained in step one through the feeding assembly 6, make the pipe pass through the quick-mounting V-shaped clamp 1-2 and the bridge 3, then clamp the pipe with the quick-mounting V-shaped clamp 1-2, and then wet saw the pipe with the wet sawing machine 1 to obtain a wet sawing pipe; add cooling liquid to the cuttings generated in the wet sawing process;

[0055] Step three, send the wet sawing pipe obtained in step two to the discharging assembly 7 through the bridge 3, and then turn the wet sawing pipe into the storage rack through the turning cylinder;

[0056] Step four, when the rolling mill outputs zirconium alloy pipes with a diameter of 10 mm, align the feeding assembly 6 with the chipless rotary cutting machine 2, and fix the chipless rotary cutting machine 2 to obtain a double-station chipless rotary cutting device;

[0057] Step five, send the pipe into the double-station chipless rotary cutting device obtained in step four through the feeding assembly 6, make the pipe pass through the quick-mounting V-shaped clamp 1-2, the front air clamp 2-2 and the rear air clamp 2-3, then clamp the pipe with the front air clamp 2-2 and the rear air clamp 2-3, and then chiplessly rotary cut the pipe with the chipless rotary cutting machine 2 to obtain a chipless rotary cut pipe;

[0058] Step six, send the chipless rotary cut pipe obtained in step five to the discharging assembly 7, and then turn the chipless rotary cut pipe into the storage rack through the turning cylinder.

[0059] Figure 3 The actual photograph of the cut end surface of the wet sawing pipe obtained in step two of this example can be seen from Figure 3 It can be seen from the actual photograph that the cut end surface has good quality.

[0060] Figure 4 The actual photograph of the cut end surface of the chipless rotary cut pipe obtained in step five of Example 2 of the present application can be seen from Figure 4 It can be seen from the actual photograph that the cut end surface has good quality.

[0061] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. Any simple modification, change and equivalent variation of the above embodiments according to the technical essence of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A dual-station cutting device for nuclear-grade zirconium alloy tubing, characterized in that, The device includes a wet sawing machine (1) and a chipless veneer (2) arranged side by side. The wet sawing machine (1) includes a bed base (1-1), on which a quick-release V-shaped clamp (1-2) and a feed assembly (1-3) are provided. The chipless veneer (2) includes a main body base (2-1), on which a front air clamp (2-2), a rear air clamp (2-3), and a cutting head (2-4) are provided. A bridge (3) is also provided on the main body base (2-1). A moving assembly (4) is provided below the main body base (2-1). A feeding assembly (6) is provided on the front side of the wet sawing machine (1), and a discharging assembly (7) is provided on the rear side of the chipless veneer (2). The method for dual-station cutting of nuclear-grade zirconium alloy tubing using the aforementioned device includes the following steps: Step 1: Align the wet sawing machine (1) with the bridge (3) and fix the main base (2-1) to obtain a dual-station wet sawing device; Step 2: Feed the pipe into the dual-station wet sawing device obtained in Step 1 through the feeding assembly (6), so that the pipe passes through the quick-installation V-shaped clamp (1-2) and the bridge (3), then clamp the pipe with the quick-installation V-shaped clamp (1-2), and then perform wet sawing with the wet sawing machine (1) to obtain wet sawing pipe. Step 3: The wet-cut pipe obtained in Step 2 is transported to the unloading assembly (7) through the bridge (3), and then the wet-cut pipe is flipped into the storage rack by the flipping cylinder; Step 4: Align the feeding assembly (6) with the chipless veneer (2) and fix the chipless veneer (2) to obtain a dual-station chipless veneer device; Step 5: Feed the pipe into the dual-station chipless rotary cutting device obtained in Step 4 through the feeding assembly (6), so that the pipe passes through the quick-installation V-shaped clamp (1-2), the front air clamp (2-2) and the rear air clamp (2-3), and then clamp the pipe with the front air clamp (2-2) and the rear air clamp (2-3), and then perform chipless rotary cutting with the chipless rotary cutting machine (2) to obtain chipless rotary cut pipe; Step 6: The chipless rotary cut pipe obtained in step 5 is transported to the unloading assembly (7), and then the chipless rotary cut pipe is flipped into the storage rack by the flipping cylinder; When the outer diameter of the pipe is greater than 15mm, wet sawing is performed using steps one to three. When the outer diameter of the pipe is less than or equal to 15mm, chipless rotary cutting is performed using steps four to six.

2. The dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, A protective cover (1-4) is provided on the bed base (1-1).

3. The dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, The wet saw (1) also includes a coolant circulation assembly (1-5) and a chip collection assembly (1-6).

4. The dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, The movable component (4) includes a movable bracket (4-1) disposed below the main unit base (2-1) and a slide rail (4-2) for the movable bracket (4-1) to move. The movable bracket (4-1) is provided with a positioning pin.

5. A dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, The bridge (3) adopts a V-groove structure, and the surface of the V-groove structure is covered with nylon board.

6. A dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, The feeding assembly (6) includes a feeding V-groove (6-1) and a conveyor belt.

7. A dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, The feeding assembly (7) includes a feeding V-shaped groove (7-1), a turning assembly, and a storage rack.

8. A dual-station cutting device for nuclear zirconium alloy tubing according to claim 1, characterized in that, In step two, coolant is added to the chips generated during the wet sawing process.

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