Batch hafnium rod corrosion sample fixed-length cutting clamp and process

Abstract

The application discloses a batch hafnium rod corrosion sample fixed-length cutting clamp, which comprises a bottom plate provided with a V-shaped groove and an S-shaped through groove, a positioning connecting hole is formed in one end of the bottom plate, a pressing rod connecting hole is formed in the other end of the bottom plate, and a follow-up pressing mechanism abutting against a wire feeding head of a wire cutting machine is further arranged on the bottom plate. In addition, the application further provides a batch hafnium rod corrosion sample fixed-length cutting process, which is used for assisting a slow wire cutting machine to perform fixed-length cutting on batch hafnium rods. The clamp is used for fixing batch hafnium rods through the bottom plate provided with the V-shaped groove and the S-shaped through groove, a positioning rod and a pressing rod, and is used for assisting the slow wire cutting machine to perform fixed-length cutting on batch hafnium rods through the follow-up pressing mechanism, so that the shape and position precision and the surface roughness of the corrosion sample are ensured, the cutting efficiency is high, a plurality of short sections with equal cutting lengths, no pollution and smooth surfaces can be efficiently cut, the consistency of sample weighing by detection personnel is ensured, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machining equipment, and particularly relates to a batch lanthanum rod corrosion sample fixed-length cutting clamp and process. BACKGROUND

[0002] Lanthanum has excellent nuclear properties of high thermal neutron absorption cross section and good comprehensive performance, and is the preferred material for reactor control rods. In the development and production process of lanthanum materials for reactor control rods, the comprehensive composition and performance indicators such as chemical composition, corrosion performance and physical performance are mainly concerned, which has ensured the finished product quality of lanthanum products. With the development of reactor technology towards the direction of improving fuel burnup, reducing fuel cycle cost, improving reactor thermal efficiency and improving safety and reliability, higher requirements are put forward for the composition and performance of key materials such as lanthanum for reactor core, among which the water side corrosion resistance is the focus. The machining of lanthanum corrosion test sample directly affects the accuracy of corrosion performance detection, so the preparation process of lanthanum corrosion test sample is an important link in the detection process.

[0003] The conventional mechanical processing mode of lanthanum rod corrosion sample has the problems of small clamping quantity, poor cutting process, lack of surface protection measures, and electrochemical corrosion surface caused by current and cooling liquid (weak acid), which causes surface pollution. The cutting precision is poor, which leads to large dispersion of batch weighing value. The continuity cannot be realized during cutting, and the clamping time is long.

[0004] In order to solve this technical problem, a lanthanum alloy corrosion sample fixed-length cutting clamp and process are needed. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a batch lanthanum rod corrosion sample fixed-length cutting clamp to solve the problems of the prior art. The clamp realizes the fixation of batch lanthanum rods through the bottom plate with V-shaped grooves in the S-shaped through groove cooperating with the positioning rod and the pressing rod, realizes the fixed-length cutting of batch lanthanum rods through the setting of the follow-up pressing mechanism, guarantees the form and position accuracy and surface roughness of the corrosion sample, has high cutting efficiency, and can efficiently cut multiple lanthanum rods with equal length, no pollution and smooth surface, guarantee the consistency of sample weighing of the detection personnel, and improve the detection efficiency.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a batch lanthanum rod corrosion sample fixed-length cutting clamp, characterized in that the fixed-length cutting clamp comprises a bottom plate, a plurality of V-shaped grooves are opened on the bottom plate, an S-shaped through groove is opened on the bottom plate and passes through all the V-shaped grooves, a positioning connecting hole for installing a positioning rod is opened at one end of the bottom plate, a pressing rod connecting hole for installing a pressing rod is opened at the other end of the bottom plate, and a follow-up pressing mechanism is further arranged on the bottom plate and abuts against the wire feeding head of the wire cutting machine.

[0007] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that the follow-up pressing mechanism comprises two groups of sliding mechanisms symmetrically installed on both sides of the bottom plate and a roller clamped between the two groups of sliding mechanisms, the sliding mechanism comprises a first sliding rail installed on the side wall of the bottom plate, the length direction of the first sliding rail is the same as the length direction of the V-shaped groove, a first sliding block is installed on the first sliding rail, a support is fixedly installed on the first sliding block, the roller is clamped on the two supports, and a top plate abutting against the wire feeding head of the wire cutting machine is further installed on the support.

[0008] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that a vertical sliding groove is arranged on the support, a vertical second sliding rail is arranged on the side wall of the sliding groove, a second sliding block is slidably connected to the second sliding rail, the second sliding block is connected with the bearing of the roller, a threaded hole is arranged on the support, and a pressing bolt is threadedly connected in the threaded hole, the bottom end of the pressing bolt abuts against the top end of the second sliding block.

[0009] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that a pressing block is arranged between the bottom end of the pressing bolt and the top end of the second sliding block, the pressing block is slidably connected with the second sliding rail, the pressing block abuts against the second sliding block, a sliding cavity is arranged in the pressing block, the bottom end of the pressing bolt is slidably connected with the sliding cavity, a pressure sensor is arranged in the sliding cavity, and the pressure sensor is electrically connected with a display.

[0010] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that a rubber pad is arranged on the outer wall of the roller.

[0011] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that the bottom surface of the pressing rod is an arc surface, and an elastic pad is arranged on the arc surface.

[0012] The batch hafnium rod corrosion sample fixed-length cutting clamp has the characteristics that the distance between the two adjacent grooves of the S-shaped through groove is the same.

[0013] In addition, the application further provides a process for batch hafnium rod corrosion sample fixed-length cutting, which has the characteristics that the process comprises the following steps:

[0014] Step one, installing the bottom plate on the workbench of the slow wire cutting machine and correcting and fixing the bottom plate;

[0015] Step two, installing the positioning rod on the bottom plate fixed in step one and correcting the positioning rod, then distributing a plurality of hafnium rods on the plurality of V-shaped grooves of the bottom plate, so that one end of the hafnium rods abuts against the positioning rod, then installing the pressing rod to press the other end of the plurality of hafnium rods on the bottom plate, and then adding pure water with a resistivity greater than 0.5 MΩ·cm in the water tank of the wire cutting machine until the hafnium rods are submerged, to obtain a loading bottom plate.

[0016] Step three, assemble the follow-up pressure mechanism on the charging bottom plate obtained in step two, then press the multiple hafnium rods by the rollers of the follow-up pressure mechanism, and make the top plate of the follow-up pressure mechanism abut against the wire feeding head, to obtain a wire cutting assembly; the pressure applied by the pressing bolt in the follow-up pressure mechanism to the pressing block is 0.43MPa-0.46MPa;

[0017] Step four, pass the copper wire into the S-shaped through slot close to one end of the positioning rod of the wire cutting assembly obtained in step three, and connect and center the wire cutting machine, then open the wire cutting machine, the wire feeding head of the wire cutting machine travels along the S-shaped through slot, the cutting wire of the slow wire cutting is used to cut the multiple hafnium rods to a fixed length, at the same time, the wire feeding head moves from the positioning rod to the pressing rod direction against the top plate, the top plate drives the whole follow-up pressure mechanism to move to the pressing rod direction, the rollers of the follow-up pressure mechanism are always pressed on the multiple hafnium rods, and the fixed length cutting of all hafnium rods is completed.

[0018] The present application is used for batch hafnium rod fixed length cutting, the positioning rod is connected at the positioning connecting hole, one hafnium rod is placed in each V-shaped slot, the ends of the multiple hafnium rods abut against the side wall of the positioning rod, the positioning of the hafnium rods is realized, the pressing rod is connected at the pressing rod connecting hole, the multiple hafnium rods are pressed in the V-shaped slot by the pressing rod, then the cutting wire of the wire cutting machine is passed through the S-shaped through slot, then the wire cutting machine is started, the wire cutting machine drives the cutting wire to travel along the S-shaped through slot, since the V-shaped slot area of the bottom plate is also provided with the S-shaped through slot, the multiple hafnium rods are continuously cut, and the multiple hafnium rods are cut into hafnium rods with fixed length.

[0019] The present application can prevent the hafnium rod surface from cooling and avoid damaging the hafnium rod surface tissue in the electrolytic environment by immersing the multiple hafnium rods in the deionized water.

[0020] The process is characterized in that the correction process in step one is that the length direction of the V-shaped slot of the bottom plate is parallel to the X-axis direction of the workbench with an error of not more than 0.005mm by using a dial gauge; and the correction process in step two is that the parallelism error between the positioning rod and the Y-axis direction of the workbench is not more than 0.005mm by using a dial gauge. The present application prevents the cutting surface from being not perpendicular to the hafnium rod side surface when the clamping error of the fixture is too large, and affects the uniqueness of the hafnium rod corrosion sample weight.

[0021] The process is characterized in that the fixed length cutting in step four adopts a cutting and repairing mode, the cutting and repairing mode is to sequentially perform rough machining, semi-precision cutting machining and precision cutting machining, the current of the rough machining is 25A-30A, the wire speed is 9000mm / min-10000mm / min, the cutting speed is 20mm / min-25mm / min, the current of the semi-precision cutting machining is 30A-35A, the wire speed is 5000mm / min-6000mm / min, the cutting speed is 10mm / min-15mm / min, and the current of the precision cutting machining is 35A-40A, the wire speed is 3000mm / min-3500mm / min, and the cutting speed is 5mm / min-10mm / min. 2 2 ​The semi-finishing process uses a current of 23A to 25A, a wire speed of 8500mm / min to 9000mm / min, and a cutting speed of 15mm / min. 2 / min~18mm 2 The current for the precision cutting process is 20A to 22A, the wire speed is 8000mm / min to 8500mm / min, and the cutting speed is 10mm / min. 2 / min~12mm 2 / min. This invention ensures the cutting effect by controlling the cutting parameters, and can efficiently cut multiple hafnium rods into short sections of equal length, without contamination and with smooth surfaces.

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

[0023] 1. This invention uses a base plate with an S-shaped through-slot and a V-shaped groove, along with a positioning rod and a pressure rod, to fix a batch of hafnium rods. By setting up a follow-up clamping mechanism to assist the slow wire cutting machine in cutting a batch of hafnium rods to a fixed length, it ensures the shape and position accuracy and surface roughness of the corrosion sample, and has high cutting efficiency. This allows multiple hafnium rods to be cut into short sections of equal length, without contamination and with smooth surfaces, thus ensuring the consistency of sample weighing by the testing personnel and improving testing efficiency.

[0024] 2. By setting a follow-up clamping mechanism, this invention can further improve the clamping effect of the hafnium rod and improve the cutting quality of the hafnium rod for fixed-length cutting. By setting a second slide rail and a second slider, hafnium rods of different diameters can be clamped, thereby improving the applicability of this fixture. By setting a pressure sensor, users can easily control the pressure applied by the roller to the hafnium rod, thereby preventing the roller from damaging the hafnium rod.

[0025] 3. By setting a rubber pad, the present invention can not only prevent the roller from scratching or crushing the hafnium rod, but also improve the clamping effect of the hafnium rod. By setting an elastic pad, it can prevent the pressure rod from scratching the surface of the hafnium rod, thereby ensuring the surface accuracy of the cut hafnium rod short section.

[0026] 4. By setting the spacing between two adjacent slots of the S-shaped through groove to be the same, the present invention can ensure the consistency of the length of the hafnium rod short section after cutting, thereby further ensuring the cutting quality of the hafnium rod short section. By adding pure water with a resistivity greater than 0.5 MΩ·cm, it is ensured that the coolant will not cause electrochemical corrosion and damage the surface structure of the hafnium rod.

[0027] 5、The present application is in the batch hafnium rod fixed length cutting, the positioning rod is connected in the positioning connecting hole, a hafnium rod is placed in each V-shaped groove, the end of multiple hafnium rods is in abutment with the side wall of the positioning rod, the hafnium rod is positioned, the pressing rod is connected in the pressing rod connecting hole, multiple hafnium rods are pressed in the V-shaped groove by the pressing rod, then the cutting wire of the wire cutting machine is passed through the S-shaped through groove, then the wire cutting machine is started, the wire cutting machine drives the cutting wire to travel along the S-shaped through groove, multiple hafnium rods are continuously cut due to the S-shaped through groove in the V-shaped groove area of the bottom plate, so that multiple hafnium rods are cut into fixed length hafnium rods.

[0028] The technical solutions of the present application are further described in detail below by means of drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure diagram of the batch hafnium rod corrosion sample fixed length cutting clamp of the present application.

[0030] Figure 2 It is the A enlarged view of Figure 1

[0031] Figure 3 It is the connection relationship diagram of the batch hafnium rod corrosion sample fixed length cutting clamp and hafnium rod of the present application.

[0032] Figure 4 It is the B enlarged view of Figure 3

[0033] Figure 5 It is the structure diagram of the bottom plate in the batch hafnium rod corrosion sample fixed length cutting clamp of the present application.

[0034] Figure 6 It is the structure diagram of the pressing rod in the batch hafnium rod corrosion sample fixed length cutting clamp of the present application.

[0035] Explanation of reference signs:

[0036] 1—bottom plate; 1-1—V-shaped groove; 1-2—S-shaped through groove;

[0037] 1-3—positioning connecting hole; 1-4—pressing rod connecting hole; 2—positioning rod;

[0038] 3—pressing rod; 3-1—elastic pad; 4—follow-up pressing mechanism;

[0039] 4-1—first slide rail; 4-2—first sliding block; 4-3—support;

[0040] 4-4—top plate; 4-5—sliding groove; 4-6—second slide rail;

[0041] 4-7—second sliding block; 4-8—pressing bolt; 4-9—pressing block;​​

[0042] 4-10—Slide cavity; 4-11—Pressure sensor; 5—Roller;

[0043] 5-1—Rubber pad; 6—Thread end; 7—Hafnium rod. Detailed Implementation

[0044] The present invention provides a batch hafnium rod corrosion sample fixed-length cutting fixture through Example 1.

[0045] Example 1

[0046] like Figures 1-6 As shown, the batch hafnium rod corrosion sample fixed-length cutting fixture of this embodiment includes a base plate 1. The base plate 1 has multiple parallel V-shaped grooves 1-1. The base plate 1 also has an S-shaped through groove 1-2 that passes through all the V-shaped grooves 1-1. One end of the base plate 1 has a positioning connection hole 1-3 for installing a positioning rod 2, and the other end has a pressure rod connection hole 1-4 for installing a pressure rod 3. The base plate 1 is also provided with a follow-up clamping mechanism 4, which abuts against the wire feeding head 6 of the wire cutting machine.

[0047] It should be noted that multiple parallel V-grooves 1-1 are formed on the base plate 1, each V-groove 1-1 capable of holding a hafnium rod 7. An S-shaped through-slot 1-2 passing through all the V-grooves 1-1 is also formed on the base plate 1 for the wire cutting wire to pass through, thereby batch-cutting the hafnium rods 7 in the V-grooves 1-1 into hafnium rod corrosion samples of a fixed length. Positioning connection holes 1-3 are formed for installing positioning rods 2, which bring the ends of the hafnium rods 7 into contact with the sidewall of the positioning rod 2, making multiple hafnium rods 7 flush with each other. Pressure rod connection holes 1-4 are formed for installing pressure rods 3, which hold the other hafnium rod 7 in place. The end is fixed, and together with the positioning rod 2, the hafnium rod 7 is clamped, ensuring that the hafnium rod 7 will not move during fixed-length cutting, thus ensuring the effect of fixed-length cutting. By setting a follow-up clamping mechanism 4 and abutting against the wire cutting machine's wire feeding head 6, when the wire cutting machine's wire feeding head 6 moves with the S-shaped through groove 1-2, the follow-up clamping mechanism 4 moves from the positioning rod 2 to the pressure rod 3, ensuring that the hafnium rod 7 is firmly clamped by the follow-up clamping mechanism 4 and the pressure rod 3 during cutting. This can assist the wire cutting machine in performing fixed-length cutting of batch hafnium rods 7, with high cutting efficiency, thus efficiently cutting multiple hafnium rods 7 into hafnium rod 7 short sections of equal length.

[0048] like Figures 1-4As shown, in this embodiment, the follow-up pressing mechanism 4 includes two sets of sliding mechanisms symmetrically installed on both sides of the base plate 1 and rollers 5 mounted between the two sets of sliding mechanisms. The sliding mechanism includes a first slide rail 4-1 installed on the side wall of the base plate 1. The length direction of the first slide rail 4-1 is the same as the length direction of the V-groove 1-1. A first slider 4-2 is installed on the first slide rail 4-1. A bracket 4-3 is fixedly installed on the first slider 4-2. Rollers 5 are mounted on the two brackets 4-3. A top plate 4-4 that abuts against the wire feeding head 6 of the wire cutting machine is also installed on the bracket 4-3. By setting up two sets of sliding mechanisms and rollers 5, the rollers 5 press the hafnium rod 7 firmly onto the V-groove 1-1 of the base plate 1 during fixed-length cutting, thereby preventing the hafnium rod 7 from shaking during cutting. When the cutting wire of the wire cutting machine travels along the S-shaped through groove 1-2 from one end of the base plate 1 near the positioning rod 2 to the other end of the base plate 1, the top plate 4-4 abuts against the wire feeding head 6 of the wire cutting machine. Therefore, the wire feeding head 6 will push the top plate 4-4 to move in the same direction, thereby using the top plate 4-4 to push the support 4. -3 As the wire feeding head 6 moves away from the positioning rod 2, the roller 5 is driven to roll away from the positioning rod 2. While the roller 5 moves with the wire feeding head 6, it always presses the hafnium rod 7 against the V-groove 1-1 of the base plate 1. As the wire feeding head 6 moves against the top plate 4-4, the distance between the pressing point of the cutting wire roller 5 and the hafnium rod 7 remains constant, which further ensures the pressing effect of the roller 5 and improves the cutting quality of the fixed-length cutting of the hafnium rod 7.

[0049] like Figures 1-4 As shown, in this embodiment, the bracket 4-3 is provided with a vertically oriented sliding groove 4-5. A vertically oriented second sliding rail 4-6 is provided on the side wall of the sliding groove 4-5. A second slider 4-7 is slidably connected to the second sliding rail 4-6. The second slider 4-7 is connected to the bearing of the roller 5. The bracket 4-3 has a threaded hole, and a clamping bolt 4-8 is threaded into the threaded hole. The bottom end of the clamping bolt 4-8 abuts against the top end of the second slider 4-7. By setting the second sliding rail 4-6 and the second slider 4-7, the vertical height of the roller 5 can be adjusted to clamp hafnium rods 7 of different diameters, thereby increasing the applicability of this fixture. By rotating the clamping bolt 4-8, the second slider 4-7 is pushed to move along the second sliding rail 4-6, thereby adjusting the vertical position of the second slider 4-7 to adapt to the clamping work of hafnium rods 7 of different diameters.

[0050] like Figures 1-4As shown, in the embodiment, a pressing block 4-9 is arranged between the bottom end of the pressing bolt 4-8 and the top end of the second sliding block 4-7, the pressing block 4-9 is in sliding connection with the second sliding rail 4-6, the pressing block 4-9 is in abutment with the second sliding block 4-7, a sliding cavity 4-10 is arranged in the pressing block 4-9, the bottom end of the pressing bolt 4-8 is in sliding connection with the sliding cavity 4-10, a pressure sensor 4-11 is arranged in the sliding cavity 4-10, and the pressure sensor 4-11 is electrically connected with a display. By rotating the pressing bolt 4-8, pressure is applied to the pressing block 4-9, the pressing block 4-9 transmits the pressure to the second sliding block 4-7, the pressure is transmitted to the hafnium rod 7 through the roller 5 connected with the second sliding block 4-7, the real-time pressure applied by the pressing bolt 4-8 to the pressing block 4-9 is detected by the pressure sensor 4-11, and the display is used for displaying, so that the user can know the real-time pressure applied by the roller 5 to the hafnium rod 7, the user can control the pressure applied by the roller 5 to the hafnium rod 7, and the hafnium rod 7 is prevented from being pressed by the roller 5.

[0051] As shown in Figure 3 and Figure 4 As shown, in the embodiment, the outer wall of the roller 5 is provided with a rubber pad 5-1. By arranging the rubber pad 5-1, the hafnium rod 7 can be prevented from being scratched or pressed by the roller 5, and the pressing effect of the hafnium rod 7 can be improved.

[0052] As shown in Figure 6 In the embodiment, the bottom surface of the pressing rod 3 is an arc surface, and the arc surface is provided with an elastic pad 3-1. By arranging the elastic pad 3-1, the surface of the hafnium rod 7 can be prevented from being scratched by the pressing rod 3, so that the surface precision of the cut hafnium rod 7 segment is ensured.

[0053] As shown in Figure 5 In the embodiment, the distance between the adjacent two notches of the S-shaped through slot 1-2 is the same. By arranging the distance between the adjacent two notches of the S-shaped through slot 1-2 to be the same, the consistency of the length of the cut hafnium rod 7 segment can be ensured, so that the cutting quality of the hafnium rod 7 segment is further ensured.

[0054] The batch hafnium rod corrosion sample fixed-length cutting method is described in detail through Embodiment 2 to Embodiment 4.

[0055] Embodiment 2

[0056] The embodiment includes the following steps:

[0057] Step one, install the bottom plate 1 on the workbench of the slow wire cutting machine, and use the micrometer to ensure that the length direction of the V-shaped groove 1-1 of the bottom plate 1 is parallel to the X-axis direction of the workbench with an error of not more than 0.005 mm, and then fix it;

[0058] Step two, install the positioning rod 2 on the bottom plate 1 fixed in step one, and use the dial gauge to make the parallelism error of the positioning rod 2 with the Y-axis direction of the workbench not more than 0.005mm, then distribute the plurality of hafnium rods 7 on the plurality of V-shaped grooves 1-1 of the bottom plate 1, make one end of the hafnium rod 7 abut against the positioning rod 2, then install the pressing rod 3 to press the other end of the plurality of hafnium rods 7 on the bottom plate 1, and add pure water with a resistivity greater than 0.5MΩ·cm in the water tank of the wire cutting machine until the hafnium rods 7 are submerged, to obtain the loading bottom plate 1;

[0059] Step three, assemble the follow-up pressing mechanism 4 on the loading bottom plate 1 obtained in step two, then use the roller 5 of the follow-up pressing mechanism 4 to press the plurality of hafnium rods 7, and make the top plate 4-4 of the follow-up pressing mechanism 4 abut against the wire feeding head 6, to obtain a cutting assembly; the pressure applied by the pressing bolt 4-8 in the follow-up pressing mechanism 4 to the pressing block 4-9 is 0.43MPa-0.46MPa; the density of the hafnium alloy rod is 13.3g / cm 3 ;

[0060] Step four, pass a copper wire with a diameter of 0.2mm into the S-shaped through groove 1-2 of the cutting assembly obtained in step three close to the end of the positioning rod 2, and the tension of the copper wire is 20N, and connect the copper wire with the wire cutting machine and center it, then open the wire cutting machine, the wire feeding head 6 of the wire cutting machine travels along the S-shaped through groove 1-2, and uses the cutting wire of the slow wire cutting to cut the plurality of hafnium rods 7 to a fixed length, at the same time, the wire feeding head 6 moves from the positioning rod 2 to the pressing rod 3 direction against the top plate 4-4, and the top plate 4-4 drives the entire follow-up pressing mechanism 4 to move to the pressing rod 3 direction, the roller 5 of the follow-up pressing mechanism 4 is always pressed on the plurality of hafnium rods 7, to complete the fixed length cutting of all the hafnium rods 7; the fixed length cutting adopts the cutting and repairing method, the cutting and repairing method is to sequentially perform rough machining, semi-fine machining and fine machining, the current of the rough machining is 25A-30A, the wire speed is 9000mm / min-10000mm / min, and the cutting speed is 20mm 2 / min-25mm 2 / min, the current of the semi-fine machining is 23A-25A, the wire speed is 8500mm / min-9000mm / min, and the cutting speed is 15mm 2 / min-18mm 2 / min, the current of the fine machining is 20A-22A, the wire speed is 8000mm / min-8500mm / min, and the cutting speed is 10mm 2 / min-12mm 2 / min.

[0061] It is detected that the hafnium rod batch fixed length cutting sample of the embodiment is uniform in length, the cutting surface is smooth, and the roughness can reach Ra=0.8μm.

[0062] Embodiment 3

[0063] The embodiment comprises the following steps:

[0064] Step one, install the base plate 1 on the workbench of the slow wire-cut electrical discharge machine, and use the dial gauge to make the length direction of the V-shaped groove 1-1 of the base plate 1 parallel to the X-axis direction of the workbench with an error of not more than 0.005 mm, and then fix it;

[0065] Step two, install the positioning rod 2 on the base plate 1 fixed in step one, and use the dial gauge to make the positioning rod 2 parallel to the Y-axis direction of the workbench with an error of not more than 0.005 mm, then distribute a plurality of hafnium rods 7 on a plurality of V-shaped grooves 1-1 of the base plate 1, make one end of the hafnium rods 7 abut against the positioning rod 2, then install the pressing rod 3 to press the other end of the plurality of hafnium rods 7 tightly on the base plate 1, and add pure water with a resistivity greater than 0.5 MΩ·cm in the water tank of the wire-cut electrical discharge machine until the hafnium rods 7 are submerged, to obtain the loading base plate 1;

[0066] Step three, assemble the follow-up pressing mechanism 4 on the loading base plate 1 obtained in step two, then use the roller 5 of the follow-up pressing mechanism 4 to press the plurality of hafnium rods 7 tightly, and make the top plate 4-4 of the follow-up pressing mechanism 4 abut against the wire feeding head 6, to obtain the cutting assembly; the pressure applied by the pressing bolt 4-8 in the follow-up pressing mechanism 4 to the pressing block 4-9 is 0.43 MPa to 0.46 MPa; the density of the hafnium alloy rod is 13.3 g / cm 3 ;

[0067] Step four, pass a copper wire with a diameter of 0.2 mm into the S-shaped through groove 1-2 of the cutting assembly obtained in step three close to the end of the positioning rod 2, and the tension of the copper wire is 20 N, and connect it with the wire-cut electrical discharge machine and center it, then turn on the wire-cut electrical discharge machine, the wire feeding head 6 of the wire-cut electrical discharge machine travels along the S-shaped through groove 1-2, and uses the cutting wire of the slow wire-cut electrical discharge to cut the plurality of hafnium rods 7 to a fixed length, at the same time, the wire feeding head 6 moves from the positioning rod 2 to the pressing rod 3 direction against the top plate 4-4, the top plate 4-4 drives the entire follow-up pressing mechanism 4 to move to the pressing rod 3 direction, the roller 5 of the follow-up pressing mechanism 4 is always pressed on the plurality of hafnium rods 7, to complete the fixed length cutting of all hafnium rods 7; the fixed length cutting adopts the way of cutting once and repairing twice, the cutting once and repairing twice is to sequentially perform rough machining, semi-fine machining and fine machining, the current of the rough machining is 25 A to 30 A, the wire speed is 9000 mm / min to 10000 mm / min, the cutting speed is 20 mm 2 / min to 25 mm 2 / min, the current of the semi-fine machining is 23 A to 25 A, the wire speed is 8500 mm / min to 9000 mm / min, and the cutting speed is 15 mm / min to 20 mm / min.2 / min~18mm 2 / min, the current of the finishing cutting process is 20A~22A, the wire speed is 8000mm / min~8500mm / min, and the cutting speed is 10mm 2 / min~12mm 2 / min.

[0068] It is detected that the hafnium rod corrosion test samples of the batch length cutting in the embodiment are uniform in length, the cutting surface is smooth, and the roughness can reach Ra=0.8μm.

[0069] Example 4

[0070] The embodiment includes the following steps:

[0071] Step one, install the base plate 1 on the workbench of the slow wire cutting machine, and use the micrometer to make the length direction of the V-shaped groove 1-1 of the base plate 1 parallel to the X-axis direction of the workbench with an error of not more than 0.005mm, and then fix it;

[0072] Step two, install the positioning rod 2 on the base plate 1 fixed in step one, and use the micrometer to make the parallelism error of the positioning rod 2 and the Y-axis direction of the workbench not more than 0.005mm, then distribute multiple hafnium rods 7 on multiple V-shaped grooves 1-1 of the base plate 1, make one end of the hafnium rod 7 abut against the positioning rod 2, then install the pressing rod 3 to press the other end of the multiple hafnium rods 7 on the base plate 1, and then add pure water with a resistivity greater than 0.5MΩ·cm in the water tank of the wire cutting machine until the hafnium rods 7 are submerged, to obtain the charging base plate 1;

[0073] Step three, assemble the follow-up pressing mechanism 4 on the charging base plate 1 obtained in step two, then use the roller 5 of the follow-up pressing mechanism 4 to press the multiple hafnium rods 7, and make the top plate 4-4 of the follow-up pressing mechanism 4 abut against the pay-off head 6, to obtain the cutting assembly; the pressure applied by the pressing bolt 4-8 in the follow-up pressing mechanism 4 to the pressing block 4-9 is 0.43MPa~0.46MPa; the density of the hafnium alloy rod is 13.3g / cm 3 ;

[0074] Step four, the S-shaped through slot 1-2 near the end of the positioning rod 2 with cutting assembly obtained in step three is penetrated by a copper wire with a diameter of 0.2 mm, and the tension of the copper wire is 20 N, and the copper wire is connected with the wire cutting machine and is centered, then the wire cutting machine is opened, the wire feeding head 6 of the wire cutting machine travels along the S-shaped through slot 1-2, and the cutting wire of the slow wire cutting is used to cut the multiple hafnium rods 7 to a fixed length, at the same time, the wire feeding head 6 moves from the positioning rod 2 to the pressing rod 3 direction against the top plate 4-4, the top plate 4-4 drives the whole follow-up pressing mechanism 4 to move to the pressing rod 3 direction, the roller 5 of the follow-up pressing mechanism 4 is always pressed on the multiple hafnium rods 7, and the fixed length cutting of all hafnium rods 7 is completed; the fixed length cutting adopts the cutting and repairing mode, the cutting and repairing mode is to sequentially perform rough machining, semi-precision cutting machining and precision cutting machining, the current of the rough machining is 25A-30A, the wire speed is 9000mm / min-10000mm / min, the cutting speed is 20mm 2 / min-25mm 2 / min, the current of the semi-precision cutting machining is 23A-25A, the wire speed is 8500mm / min-9000mm / min, the cutting speed is 15mm 2 / min-18mm 2 / min, the current of the precision cutting machining is 20A-22A, the wire speed is 8000mm / min-8500mm / min, and the cutting speed is 10mm 2 / min-12mm 2 / min.

[0075] It is detected that the hafnium rod corrosion test sample cut by the batch fixed length cutting has uniform length, smooth cutting surface, and roughness of Ra=0.8μm.

[0076] The above is only a preferred embodiment of the present application, and does not limit the present application. Any simple modification, change and equivalent change of the above embodiment according to the technical essence of the present application are still within the protection scope of the technical solution of the present application.

Claims

1. A batch hafnium rod etch coupon length cutting fixture, characterized by, The fixed-length cutting clamp comprises a bottom plate (1), a plurality of mutually parallel V-shaped grooves (1-1) are formed on the bottom plate (1), an S-shaped through groove (1-2) passing through all the V-shaped grooves (1-1) is also formed on the bottom plate (1), a positioning connecting hole (1-3) for mounting a positioning rod (2) is formed at one end of the bottom plate (1), a pressure rod connecting hole (1-4) for mounting a pressure rod (3) is formed at the other end of the bottom plate (1), and a follow-up pressure mechanism (4) is further arranged on the bottom plate (1) and abuts against a wire feeding head (6) of a wire cutting machine; the follow-up pressure mechanism (4) comprises two groups of sliding mechanisms symmetrically arranged on both sides of the bottom plate (1) and a roller (5) clamped between the two groups of sliding mechanisms, the sliding mechanism comprises a first sliding rail (4-1) mounted on the side wall of the bottom plate (1), the length direction of the first sliding rail (4-1) is the same as the length direction of the V-shaped groove (1-1), a first sliding block (4-2) is mounted on the first sliding rail (4-1), a support (4-3) is fixedly mounted on the first sliding block (4-2), the two supports (4-3) clamp the roller (5), and a top plate (4-4) abutting against the wire feeding head (6) of the wire cutting machine is further mounted on the support (4-3); a vertical sliding groove (4-5) is arranged on the support (4-3), a vertical second sliding rail (4-6) is arranged on the side wall of the sliding groove (4-5), a second sliding block (4-7) is slidably connected to the second sliding rail (4-6), the second sliding block (4-7) is connected to the bearing of the roller (5), a threaded hole is formed in the support (4-3), a pressure bolt (4-8) is threadedly connected in the threaded hole, and the bottom end of the pressure bolt (4-8) abuts against the top end of the second sliding block (4-7); a pressure block (4-9) is arranged between the bottom end of the pressure bolt (4-8) and the top end of the second sliding block (4-7), the pressure block (4-9) is slidably connected to the second sliding rail (4-6) and abuts against the second sliding block (4-7), a sliding cavity (4-10) is arranged in the pressure block (4-9), the bottom end of the pressure bolt (4-8) is slidably connected to the sliding cavity (4-10), a pressure sensor (4-11) is arranged in the sliding cavity (4-10), and the pressure sensor (4-11) is electrically connected to a display.

2. The batch hafnium rod etch coupon length cutting fixture of claim 1, wherein, A rubber pad (5-1) is arranged on the outer wall of the roller (5).

3. The batch hafnium rod etch coupon length cutting fixture of claim 1, wherein, The bottom surface of the pressure rod (3) is an arched surface, and an elastic pad (3-1) is arranged on the arched surface.

4. The batch hafnium rod etch coupon length cutting fixture of claim 1, wherein, The distance between the adjacent two grooves of the S-shaped through groove (1-2) is the same.

5. A process for batch cutting of hafnium rod etch coupons to length using the fixture of any one of claims 1-4. The process comprises the following steps: Step one, mounting the bottom plate (1) on the workbench of the slow wire cutting machine and correcting and fixing it; Step two, install the positioning rod (2) on the bottom plate (1) fixed in step one, and correct it, then distribute the multiple hafnium rods (7) on the multiple V-shaped grooves (1-1) of the bottom plate (1), make one end of the hafnium rod (7) abut against the positioning rod (2), then install the pressing rod (3) to press the other end of the multiple hafnium rods (7) on the bottom plate (1), and add pure water with a resistivity greater than 0.5 MΩ·cm in the water tank of the wire cutting machine until the hafnium rods (7) are submerged, to obtain the loading bottom plate (1); Step three, assemble the follow-up pressing mechanism (4) on the loading bottom plate (1) obtained in step two, then press the multiple hafnium rods (7) by the roller (5) of the follow-up pressing mechanism (4), and make the top plate (4-4) of the follow-up pressing mechanism (4) abut against the wire feeding head (6), to obtain the cutting assembly; the pressure applied by the pressing bolt (4-8) in the follow-up pressing mechanism (4) to the pressing block (4-9) is 0.43 MPa~0.46 MPa; Step four, pass the copper wire into the S-shaped through groove (1-2) of the cutting assembly obtained in step three close to the positioning rod (2), and connect and center the wire cutting machine, then turn on the wire cutting machine, the wire feeding head (6) of the wire cutting machine travels along the S-shaped through groove (1-2), and the cutting wire of the slow wire cutting cuts the multiple hafnium rods (7) to a fixed length, at the same time, the wire feeding head (6) moves from the positioning rod (2) to the pressing rod (3) direction against the top plate (4-4), the top plate (4-4) drives the entire follow-up pressing mechanism (4) to move to the pressing rod (3) direction, and the roller (5) of the follow-up pressing mechanism (4) is always pressed on the multiple hafnium rods (7), to complete the fixed length cutting of all hafnium rods (7).

6. The process of claim 5, wherein, The correction process in step one is that the length direction of the V-shaped groove (1-1) of the bottom plate (1) is parallel to the X-axis direction of the workbench with an error of not more than 0.005 mm; the correction process in step two is that the positioning rod (2) is parallel to the Y-axis direction of the workbench with an error of not more than 0.005 mm.

7. The process of claim 5, wherein, The length cutting in the fourth step adopts a cutting and repairing mode, which is to sequentially perform rough cutting, semi-finish cutting and finish cutting, the current of the rough cutting is 25A~30A, the wire speed is 9000mm / min~10000mm / min, the cutting speed is 20mm 2 / min~25mm 2 / min, the current of the semi-finish cutting is 23A~25A, the wire speed is 8500mm / min~9000mm / min, the cutting speed is 15mm 2 / min~18mm 2 / min, the current of the finish cutting is 20A~22A, the wire speed is 8000mm / min~8500mm / min, the cutting speed is 10mm 2 / min~12mm 2 / min.

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