A tooling fixture and sample preparation device

Abstract

The utility model relates to the technical field of plastic pipe body test, more particularly, a kind of tool fixture and sample preparation device, tool fixture includes pipe body fixing part, outer circle fixing part and inner circle fixing part, outer circle fixing part and inner circle fixing part are all with pipe body fixing part sliding connection, outer circle fixing part is equipped with the through-hole that can make pipe body pass, through-hole inboard is equipped with first outer circle locating surface, the outer wall of inner circle fixing part is equipped with first inner circle locating surface, first outer circle locating surface and first inner circle locating surface can maintain the shape of pipe body, prevent pipe body deformation;Sample preparation device includes bench, driving arrangement, milling cutter assembly and as the tool fixture described in embodiment two, pipe body fixing part, outer circle fixing part and inner circle fixing part are placed on bench, driving arrangement is connected with milling cutter assembly, by sliding outer circle fixing part and inner circle fixing part and moving tool fixture whole, cooperate milling cutter assembly, just can complete the processing of pipe body, simple and efficient operation.

Description

Technical Field

[0001] This utility model relates to the field of plastic tube testing technology, and more specifically, to a tooling fixture and sample preparation device. Background Technology

[0002] PVC-O pipe, short for biaxially oriented polyvinyl chloride pipe, is a new type of pipe manufactured using advanced production equipment and a special orientation processing technology. Compared to PVC-U pipe, it possesses higher pipe strength, toughness, impact resistance, and fatigue resistance. Currently, the industry primarily tests the pipe strength of PVC-O pipe through circumferential and axial tensile tests. The circumferential tensile test mainly references the test method recorded in the standard ASTM D2290-16. Sample preparation is relatively complex, requiring the use of lathes and milling machines in daily production, which is time-consuming and cumbersome. Alignment is difficult when machining the grooves at both ends of the pipe; and deformation is prone to occur during clamping and milling processes. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies in clamping and processing tubes, which can easily cause tube deformation. It provides a tooling fixture and sample preparation device that can maintain the shape of the tube and prevent tube deformation.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A tooling fixture is provided, including a tube body fixing component, an outer circle fixing component, and an inner circle fixing component. The outer circle fixing component and the inner circle fixing component are slidably connected to the tube body fixing component. The outer circle fixing component has a through hole that allows the tube body to pass through. The inner side of the through hole is a first outer circle positioning surface that can abut against the outer wall of the tube body. The inner circle fixing component is located in the through hole, and the outer wall of the inner circle fixing component is a first inner circle positioning surface that can abut against the inner wall of the tube body.

[0006] This utility model's tooling fixture has an outer side for the outer circular fixing member, away from the tube body fixing member, and an inner side for the outer circular fixing member. In use, the sample tube extruded by the extruder is cut into several sections, ensuring the tube length exceeds the minimum required sample length. After simply cleaning the burrs from the tube's cut edge, one end of the tube is passed through the gap between the outer and inner circular fixing members and secured with the tube body fixing member. The outer wall of the tube abuts against the first outer circular positioning surface, and the inner wall abuts against the first inner circular positioning surface. The outer and inner circular fixing members are controlled to slide relative to the tube body fixing member, making their outer surfaces flush. The length of the tube's cut edge extending beyond the outer side of the outer circular fixing member matches the cutting amount of the milling cutter. The tooling fixture is moved, and the excess portion of the tube is cut off with the milling cutter. Finally, the outer and inner circular fixing members are secured. The component slides inward, that is, towards the tube body fixing component, so that the outer surfaces of the outer and inner circular fixing components are flush. The length of the tube body kerf extending beyond the outer side of the outer circular fixing component matches the cutting amount of the milling cutter. Move the tooling fixture and use the milling cutter to cut off the excess part of the tube body. Repeat the operation until the end of the tube body is milled flat. After milling the end of the tube body flat, slide the outer and inner circular fixing components inward and use the milling cutter to perform a grooving operation on the tube body. After grooving one end of the tube body, remove the tube body from the tube body fixing component and fix the grooved end of the tube body onto the tube body fixing component. Repeat the milling and grooving operations as described above. Since the first outer circular positioning surface and the first inner circular positioning surface abut against the outer wall and inner wall of the tube body respectively, the first outer circular positioning surface and the first inner circular positioning surface can maintain the shape of the tube body and prevent the tube body from deforming during the milling process.

[0007] Furthermore, the outer circular fixing member is provided with a first positioning groove that allows the milling cutter to enter, and the inner circular fixing member is provided with a second positioning groove that allows the milling cutter entering the first positioning groove to enter. The first positioning groove and the second positioning groove are connected. After milling the end of the pipe body flat, the tooling fixture is moved so that the milling cutter is aligned with the first positioning groove and the second positioning groove. The milling cutter is guided into the first positioning groove and the second positioning groove to cut the pipe body, thus completing the grooving process of the pipe body.

[0008] Furthermore, the second positioning groove penetrates the inner circular fixing member radially, and there are two first positioning grooves, each communicating with one end of the second positioning groove. This allows for the simultaneous machining of two grooves at one end of the tube.

[0009] Furthermore, it also includes a limiting block and an elastic element. The tube body fixing component has an annular fixing groove on the side opposite to the outer circle fixing component. The fixing groove has a second outer circle positioning surface that abuts against the outer wall of the tube body and a second inner circle positioning surface that abuts against the inner wall of the tube body. The second inner circle positioning surface has a limiting groove. The limiting groove and the second positioning groove have the same width. The limiting groove and the second positioning groove are aligned along the tube body axis. One end of the elastic element is connected to the bottom of the limiting groove, and the other end is connected to the limiting block. The sum of the lengths of the limiting block and the elastic element in the relaxed state is greater than the depth of the limiting groove. When installing the pipe, overcome the elastic force of the elastic element to press the limiting block into the limiting groove, insert the pipe into the fixing groove and fix it, with the limiting block abutting against the pipe. After grooving the other end of the pipe, remove the pipe from the fixing groove, adjust the direction of the pipe so that the processed end faces inward and the unprocessed end faces outward, insert the processed end into the fixing groove. Before inserting the pipe, align the groove at the end of the pipe with the limiting block. When inserted, the limiting block snaps into the groove, which limits the pipe and prevents the pipe from rotating and causing the groove position to change. Process the unprocessed end of the pipe to accurately determine the relative position of the grooves at both ends of the pipe.

[0010] Furthermore, the limiting groove and the second positioning groove are aligned along the axial direction of the tube body. This alignment ensures that the grooves machined at both ends of the tube body are precisely aligned.

[0011] Furthermore, it also includes a driving mechanism, which is connected to both the outer and inner circular fixing members. When it is necessary to move the outer and inner circular fixing members, the driving mechanism drives the outer and inner circular fixing members to move.

[0012] Furthermore, the driving mechanism includes a drive shaft, an outer circular drive shaft, an inner circular drive shaft, and a gear set. The drive shaft is fixedly connected to the input end of the gear set. The gear set has two sets of output ends, which are respectively fixedly connected to the outer circular drive shaft and the inner circular drive shaft. The outer circular drive shaft has a first thread, and the inner circular drive shaft has a second thread. The outer circular fixing member has a first threaded hole that mates with the first thread, and the inner circular fixing member has a second threaded hole that mates with the second thread. When the outer circular fixing member and the inner circular fixing member are moved, the drive shaft is rotated. The drive shaft drives the outer circular drive shaft and the inner circular drive shaft to rotate through the gear set. Through the engagement of the first thread and the first threaded hole, and the second thread and the second threaded hole, the outer circular drive shaft and the inner circular drive shaft respectively drive the outer circular fixing member and the inner circular fixing member to move.

[0013] Furthermore, the gear set includes a first primary gear, a second primary gear, a first secondary gear, and a second secondary gear. The shaft of the first primary gear is fixedly connected to the drive shaft. The first primary gear meshes with the second primary gear. The second primary gear is fixedly connected to the shaft of the first secondary gear. The first secondary gear meshes with two sets of second secondary gears. The shafts of the two sets of second secondary gears are fixedly connected to the outer circular drive shaft and the inner circular drive shaft. When the outer and inner circular fixed parts are moved, the drive shaft is rotated. The drive shaft drives the first primary gear to rotate, the first primary gear drives the second primary gear to rotate, the second primary gear drives the first secondary gear to rotate, and the first secondary gear drives the two sets of second secondary gears to rotate, thereby driving the outer circular drive shaft and the inner circular drive shaft to rotate.

[0014] Furthermore, the tube body fixing component is provided with a first guide post and a second guide post, the outer circle fixing component is provided with an outer circle guide hole, and the inner circle fixing component is provided with an inner circle guide hole. The first guide post passes through the outer circle guide hole, and the second guide post passes through the inner circle guide hole. When the outer circle fixing component is moved, the first guide post slides relative to the outer circle guide hole; when the inner circle fixing component is moved, the second guide post slides relative to the inner circle guide hole, thereby restricting the movement direction of the outer circle fixing component and the inner circle fixing component, so that the outer circle fixing component and the inner circle fixing component move in a straight line relative to the tube body fixing component.

[0015] A sample preparation device is also provided, including a machine base, a drive unit, a milling cutter assembly, and a tooling fixture as described above. The tube body fixing member, the outer circle fixing member, and the inner circle fixing member are placed on the machine base, the milling cutter assembly is mounted on the machine base, and the drive unit is connected to the milling cutter assembly.

[0016] This utility model's sample preparation device involves cutting the sample tube extruded by the extruder into several sections, ensuring the tube length exceeds the minimum required sample length. After simply cleaning the burrs from the tube's cut edge, one end of the tube is passed through the gap between the outer and inner circular fixing parts and secured with the tube fixing parts, completing the tube installation. The outer and inner circular fixing parts are controlled to slide relative to the tube fixing parts, ensuring the tube's cut edge extends beyond the outer circular fixing parts to match the cutting amount of the milling cutter assembly. The drive device is activated, driving the milling cutter assembly to cut the excess portion of the tube. This process is repeated until the tube end is milled flat. After milling the tube end flat, the milling cutter assembly is guided into the first and second positioning grooves to perform grooving. After grooving one end of the tube, the tube is removed from the tube fixing parts, and the machined end is fixedly installed on the tube fixing parts. The milling and grooving processes described above are repeated. The operation is simple and efficient, eliminating the need for large equipment such as lathes and milling machines to complete sample preparation.

[0017] Furthermore, the milling cutter assembly includes a tool holder and a milling cutter. One end of the milling cutter is rotatably connected to the tool holder. The output end of the drive device passes through the upper surface of the machine base and is fixedly connected to the other end of the milling cutter. Bearings are provided between the milling cutter and the tool holder, and between the milling cutter and the drive device. The top and bottom of the side of the outer cylindrical fixing member opposite to the milling cutter are provided with limiting surfaces that can abut against the bearings. The axial distance between the limiting surface and the outer surface of the outer cylindrical fixing member is equal to the radius difference between the milling cutter and the bearing. When milling the end of the tube, the bearing abuts against the limiting surface, at which point the milling cutter just contacts the outer surface of the outer cylindrical fixing member, thereby enabling the milling cutter to completely cut the portion of the tube that extends beyond the outer cylindrical fixing member.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The tooling fixture of this utility model has the following features: 1. The first outer circle positioning surface and the first inner circle positioning surface can maintain the shape of the tube body and prevent the tube body from deforming during the milling process; 2. When the machined end of the tube body is inserted into the fixing groove of the tube body fixing component, the limiting block is engaged in the machined groove of the tube body, which plays a limiting role in the tube body and prevents the tube body from rotating and causing the groove position to change, thereby achieving precise alignment of the grooves at both ends of the tube body.

[0020] The sample preparation device of this utility model is simple and efficient to operate, and can complete the sample preparation without the need for large equipment such as lathes and milling machines. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the tooling fixture of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the outer circle fixing component of the tooling fixture of this utility model;

[0023] Figure 3 This is a schematic diagram of the inner circle fixing component of the tooling fixture of this utility model;

[0024] Figure 4 This is a structural schematic diagram of the tube body fixing component of the tooling fixture of this utility model;

[0025] Figure 5 This is a schematic diagram of the drive mechanism of the tooling fixture of this utility model;

[0026] Figure 6 This is a schematic diagram of the sample preparation device of this utility model;

[0027] Figure 7 This is a schematic diagram of the tube structure.

[0028] In the attached diagram: 1. Tube body fixing component; 11. Second outer circle positioning surface; 12. Second inner circle positioning surface; 121. Limiting groove; 122. Limiting block; 123. Elastic component; 13. First guide post; 14. Second guide post; 15. Handle; 2. Outer circle fixing component; 21. First outer circle positioning surface; 22. First positioning groove; 221. Guide groove; 222. Cutting groove; 23. Limiting surface; 24. Outer circle guide hole; 25. First screw hole; 3. Inner circle fixing component; 31. First inner circle positioning surface; 32. Second positioning groove; 33. Inner circle guide hole; 34. Second screw hole; 4. Drive mechanism; 41. Drive shaft; 42. Outer circle transmission shaft; 43. Inner circle transmission shaft; 44. Gear set; 441. First main gear; 442. Second main gear; 443. First auxiliary gear; 444. Second auxiliary gear; 45. Gear box; 5. Tube body; 6. Milling cutter assembly; 61. Tool holder; 62. Milling cutter; 63. Bearing; 7. Machine base. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0030] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] Example 1

[0032] like Figures 1 to 4 The first embodiment of the tooling fixture of this utility model is shown, including a tube body fixing member 1, an outer circle fixing member 2 and an inner circle fixing member 3. The outer circle fixing member 2 and the inner circle fixing member 3 are slidably connected to the tube body fixing member 1. The outer circle fixing member 2 is provided with a through hole that allows the tube body 5 to pass through. The inner side of the through hole is a first outer circle positioning surface 21 that can abut against the outer wall of the tube body 5. The inner circle fixing member 3 is located in the through hole. The outer wall of the inner circle fixing member 3 is a first inner circle positioning surface 31 that can abut against the inner wall of the tube body 5.

[0033] The tooling fixture of this utility model has the outer side of the outer circle fixing member 2 away from the tube body fixing member 1 as the outer side and the inner side of the outer circle fixing member 2 close to the tube body fixing member 1 as the inner side. In use, the sample tube body 5 extruded by the extruder is cut into several sections, making the length of the tube body 5 greater than the minimum length of the required sample. After simply cleaning the burrs on the cut of the tube body 5, one end of the tube body 5 is passed through the gap between the outer circle fixing member 2 and the inner circle fixing member 3, and fixed with the tube body fixing member 1. The outer wall of the tube body 5 abuts against the first outer circle positioning surface 21, and the inner wall of the tube body 5 abuts against the first inner circle positioning surface 31. The outer circle fixing member 2 and the inner circle fixing member 3 are controlled to slide relative to the tube body fixing member 1, making the outer surfaces of the outer circle fixing member 2 and the inner circle fixing member 3 flush. The length of the cut of the tube body 5 extending beyond the outer side of the outer circle fixing member 2 matches the cutting amount of the milling cutter 62. The tooling fixture is moved, and the excess part of the tube body 5 is cut off with the milling cutter 62. Then, the outer circle fixing member 2 is fixed with the inner circle fixing member 1. The fixing part 2 and the inner circle fixing part 3 slide inward, that is, slide towards the tube body fixing part 1, so that the outer surfaces of the outer circle fixing part 2 and the inner circle fixing part 3 are flush. The length of the cut of the tube body 5 beyond the outer side of the outer circle fixing part 2 is consistent with the cutting amount of the milling cutter 62. Move the tooling fixture and use the milling cutter 62 to cut off the excess part of the tube body 5. Repeat the operation until the end of the tube body 5 is milled flat. After milling the end of the tube body 5 flat, use the milling cutter 62 to perform a grooving operation on the tube body 5. After grooving one end of the tube body 5, remove the tube body 5 from the tube body fixing part 1 and fix the machined end of the tube body 5 on the tube body fixing part 1. Repeat the milling and grooving operations as described above. Since the first outer circle positioning surface 21 and the first inner circle positioning surface 31 abut against the outer wall and inner wall of the tube body 5 respectively, the first outer circle positioning surface 21 and the first inner circle positioning surface 31 can maintain the shape of the tube body 5 and prevent the tube body 5 from deforming during the milling process.

[0034] In this embodiment, a handle 15 is provided on the side wall of the tube body fixing member 1, and the tooling fixture can be moved conveniently using the handle 15.

[0035] like Figure 2 As shown, the outer circular fixing member 2 is provided with a first positioning groove 22 that allows the milling cutter 62 to enter, and the inner circular fixing member 3 is provided with a second positioning groove 32 that allows the milling cutter 62, which enters the first positioning groove 22, to enter. The first positioning groove 22 and the second positioning groove 32 are connected. After milling the end of the tube body 5 flat, the tooling fixture is moved so that the milling cutter 62 is aligned with the first positioning groove 22 and the second positioning groove 32. The milling cutter 62 is guided into the first positioning groove 22 and the second positioning groove 32 to cut the tube body 5, thus completing the grooving process of the tube body 5.

[0036] The second positioning groove 32 penetrates the inner circular fixing member 3 radially. There are two first positioning grooves 22, which are respectively connected to the two ends of the second positioning groove 32. The processing of the two grooves at one end of the tube body 5 can be completed in one operation.

[0037] like Figure 4 As shown, it also includes a limiting block 122 and an elastic element 123. The tube body fixing member 1 is provided with an annular fixing groove on the side opposite to the outer circle fixing member 2. The fixing groove is provided with a second outer circle positioning surface 11 that abuts against the outer wall of the tube body 5 and a second inner circle positioning surface 12 that abuts against the inner wall of the tube body 5. A limiting groove 121 is provided on the second inner circle positioning surface 12. The width of the limiting groove 121 is equal to that of the second positioning groove 32. The limiting groove 121 and the second positioning groove 32 are aligned along the axial direction of the tube body 5. One end of the elastic element 123 is connected to the bottom of the limiting groove 121, and the other end is connected to the limiting block 122. The sum of the lengths of the limiting block 122 and the elastic element 123 in the relaxed state is greater than the depth of the limiting groove 121. When installing the tube body 5, the limiting block 122 is pressed into the limiting groove 121 by overcoming the elastic force of the elastic element 123. The tube body 5 is then inserted into the fixing groove and fixed, with the limiting block 122 abutting against the tube body 5. After the other end of the tube body 5 is grooved, the tube body 5 is removed from the fixing groove, and the direction of the tube body 5 is reversed so that the processed end of the tube body 5 faces inward and the unprocessed end faces outward. The processed end is then inserted into the fixing groove. Before inserting the tube body 5, the groove at the end of the tube body 5 is aligned with the limiting block 122. When inserted, the limiting block 122 is engaged in the groove, which serves to limit the position of the tube body 5 and prevent the tube body 5 from rotating and causing the groove position to change. The unprocessed end of the tube body 5 is then processed to accurately determine the relative position of the grooves at both ends of the tube body 5.

[0038] The limiting groove 121 and the second positioning groove 32 are aligned along the axial direction of the tube body 5. The alignment of the limiting groove 121 and the second positioning groove 32 ensures that the grooves machined at both ends of the tube body 5 can be precisely aligned.

[0039] In this embodiment, the top surface of the limiting block 122 is an arc surface that can contact the end face of the tube 5. During the process of inserting the unprocessed tube 5 into the fixing groove, after the tube 5 contacts the arc surface at the top of the limiting block 122, the limiting block 122 is pressed into the limiting groove 121 by squeezing the arc surface; the elastic element 123 is a spring.

[0040] like Figure 4 As shown, the pipe body fixing component 1 is provided with a first guide post 13 and a second guide post 14, the outer circle fixing component 2 is provided with an outer circle guide hole 24, and the inner circle fixing component 3 is provided with an inner circle guide hole 33. The first guide post 13 passes through the outer circle guide hole 24, and the second guide post 14 passes through the inner circle guide hole 33. When the outer circle fixing component 2 is moved, the first guide post 13 slides relative to the outer circle guide hole 24, and when the inner circle fixing component 3 is moved, the second guide post 14 slides relative to the inner circle guide hole 33, thereby restricting the movement direction of the outer circle fixing component 2 and the inner circle fixing component 3, so that the outer circle fixing component 2 and the inner circle fixing component 3 move in a straight line relative to the pipe body fixing component 1.

[0041] The working principle of the tooling fixture in this embodiment is as follows: 1. In use, the sample tube 5 extruded by the extruder is cut into several sections, so that the length of the tube 5 is greater than the minimum length of the required sample; 2. After simply cleaning the burrs on the cut of the tube 5, one end of the tube 5 is inserted through the gap between the outer circle fixing part 2 and the inner circle fixing part 3 and fixed in the tube fixing part 1. The tube 5 contacts the arc surface of the limiting block 122, and the arc surface of the limiting block 122 is pressed to overcome the elastic force of the spring and press the limiting block 122 into the limiting groove 121; 3. The outer circle fixing part 2 and the inner circle fixing part 3 are moved. The inner circle fixing part 3, the first guide post 13, and the second guide post 14 guide the outer circle fixing part 2 and the inner circle fixing part 3, causing them to slide relative to the pipe body fixing part 1. This makes the outer surfaces of the outer circle fixing part 2 and the inner circle fixing part 3 flush, and the length of the cut of the pipe body 5 extending beyond the outer side of the outer circle fixing part 2 matches the cutting amount of the milling cutter 62. By moving the tooling fixture through the handle 15, the milling cutter 62 cuts off the excess part of the pipe body 5, and then the outer circle fixing part 2 and the inner circle fixing part 3 slide inward, i.e., towards the pipe body fixing part 1. Slide the tube body 5 so that the outer surfaces of the outer and inner ring fasteners 2 and 3 are flush. The length of the cut of the tube body 5 beyond the outer side of the outer ring fastener 2 should match the cutting amount of the milling cutter 62. Move the tooling fixture by the handle 15 and use the milling cutter 62 to cut the excess part of the tube body 5. Repeat the operation until the end of the tube body 5 is milled flat. 4. After milling the end of the tube body 5 flat, guide the milling cutter 62 into the first positioning groove 22 and the second positioning groove 32, and use the milling cutter 62 to cut two grooves at the end of the tube body 5. 5. After slotting one end of the tube body 5, remove the tube body 5 from the tube body fastener 1. The limiting block 122 in the limiting groove 121 is reset by the spring force and pops out of the limiting groove 121. Adjust the direction of the tube body 5 so that the machined end of the tube body 5 faces inward and the unmachined end faces outward. Align the groove of the tube body 5 with the limiting block 122. Insert the machined end into the fixing groove. The limiting block 122 is locked into the groove of the tube body 5 to limit the tube body 5 and prevent the tube body 5 from rotating during the processing. This ensures that the grooves machined at both ends of the tube body 5 can be accurately aligned. 6. Repeat the milling and grooving process as described above to complete the sample preparation work.

[0042] The tooling fixture in this embodiment is easy to operate, requiring no lathe or milling machine. Sample preparation can be completed using existing laboratory sample preparation machines, such as dumbbell-type sample preparation machines. The processed samples are as follows: Figure 7 As shown.

[0043] Example 2

[0044] This embodiment is the second embodiment of the tooling fixture of this utility model. This embodiment is similar to the first embodiment, except that it also includes a driving mechanism 4, which is connected to both the outer circular fixing member 2 and the inner circular fixing member 3. When it is necessary to move the outer circular fixing member 2 and the inner circular fixing member 3, the driving mechanism 4 drives the outer circular fixing member 2 and the inner circular fixing member 3 to move. Figure 5 As shown.

[0045] The drive mechanism 4 includes a drive shaft 41, an outer circular drive shaft 42, an inner circular drive shaft 43, and a gear set 44. The drive shaft 41 is fixedly connected to the input end of the gear set 44. The gear set 44 has two sets of output ends, which are respectively fixedly connected to the outer circular drive shaft 42 and the inner circular drive shaft 43. The outer circular drive shaft 42 has a first thread, and the inner circular drive shaft 43 has a second thread. The outer circular fixing part 2 has a first threaded hole 25 that mates with the first thread, and the inner circular fixing part 3 has a second threaded hole 34 that mates with the second thread. When the outer circular fixing part 2 and the inner circular fixing part 3 are moved, the drive shaft 41 is rotated. The drive shaft 41 drives the outer circular drive shaft 42 and the inner circular drive shaft 43 to rotate through the gear set 44. Through the engagement of the first thread with the first threaded hole 25 and the second thread with the second threaded hole 34, the outer circular drive shaft 42 and the inner circular drive shaft 43 respectively drive the outer circular fixing part 2 and the inner circular fixing part 3 to move.

[0046] In this embodiment, as Figure 5 As shown, the gear set 44 includes a first main gear 441, a second main gear 442, a first auxiliary gear 443, and a second auxiliary gear 444. The shaft of the first main gear 441 is fixedly connected to the drive shaft 41. The first main gear 441 meshes with the second main gear 442. The shaft of the second main gear 442 is fixedly connected to the shaft of the first auxiliary gear 443. The first auxiliary gear 443 meshes with two sets of second auxiliary gears 444. The shafts of the two sets of second auxiliary gears 444 are fixedly connected to the outer circular drive shaft 42 and the inner circular drive shaft 43. There are two second main gears 442 and two first auxiliary gears 443, and four second auxiliary gears 444. The gear set 44 also includes a gear box 45, which is fixedly installed on the side of the tube body fixing member 1 away from the outer circular fixing member 2. The outer circular drive shaft 42, the inner circular drive shaft 43, and the gear set 44 are installed inside the gear box 45, and the drive shaft 41 passes through the gear box 45.

[0047] The working principle of the tooling fixture in this embodiment is as follows: When moving the outer circle fixed part 2 and the inner circle fixed part 3, the drive shaft 41 is rotated. The drive shaft 41 drives the first main gear 441 to rotate. The first drive gear drives the two second main gears 442 to rotate. The second main gears 442 drive the first auxiliary gear 443 to rotate. Each first auxiliary gear 443 drives the two second auxiliary gears 444 to rotate, thereby driving the outer circle transmission shaft 42 and the inner circle transmission shaft 43 to rotate. Through the cooperation of the first thread and the first screw hole 25, and the second thread and the second screw hole 34, the outer circle transmission shaft 42 and the inner circle transmission shaft 43 respectively drive the outer circle fixed part 2 and the inner circle fixed part 3 to move.

[0048] Example 3

[0049] This embodiment is the first embodiment of the sample preparation device of this utility model, including a machine base 7, a drive device, a milling cutter assembly 6, and a tooling fixture as described in Embodiment 2. The tube body fixing member 1, the outer circle fixing member 2, and the inner circle fixing member 3 are placed on the machine base 7, the milling cutter assembly 6 is mounted on the machine base 7, and the drive device is connected to the milling cutter assembly 6. Figure 6 As shown.

[0050] In this sample preparation device, the sample tube 5 extruded from the extruder is cut into several sections, ensuring that the length of each section is greater than the minimum required sample length. After simply cleaning the burrs from the cut edges of the sections, one end of the section 5 is passed through the gap between the outer and inner circular fixing parts 2 and secured with the section fixing part 1, completing the installation of the section 5. The drive shaft 41 is then rotated, driving the outer and inner circular drive shafts 42 and 43 to rotate. Through threaded engagement, the outer and inner circular fixing parts 2 and 3 are controlled to slide relative to the section fixing part 1, causing the cut edges of the section 5 to extend beyond the outer circular fixing part 2. The length of the tube body 5 is consistent with the cutting amount of the milling cutter assembly 6. The drive device is turned on, and the milling cutter assembly 6 is driven to cut the excess part of the tube body 5. The operation is repeated until the end of the tube body 5 is milled flat. After the end of the tube body 5 is milled flat, the milling cutter assembly 6 is guided into the first positioning groove 22 and the second positioning groove 32 to perform grooving operation on the tube body 5. After grooving one end of the tube body 5 is completed, the tube body 5 is removed from the tube body fixing part 1, and the processed end of the tube body 5 is fixedly installed on the tube body fixing part 1. The milling and grooving process described above is repeated. The operation is simple and efficient, and the sample preparation can be completed without the use of large equipment such as lathes and milling machines.

[0051] The milling cutter assembly 6 includes a tool holder 61 and a milling cutter 62. One end of the milling cutter 62 is rotatably connected to the tool holder 61. The output end of the drive device passes through the upper surface of the machine base 7 and is fixedly connected to the other end of the milling cutter 62. Bearings 63 are provided between the milling cutter 62 and the tool holder 61, and between the milling cutter 62 and the drive device. The top and bottom of the side of the outer circular fixing member 2 opposite to the milling cutter 62 are provided with limiting surfaces 23 that can abut against the bearings 63. The axial distance between the limiting surface 23 and the outer surface of the outer circular fixing member 2 is equal to the radius difference between the milling cutter 62 and the bearing 63. When the end of the tube body 5 is milled, the bearing 63 abuts against the limiting surface 23. At this time, the milling cutter 62 just contacts the outer surface of the outer circular fixing member 2, so that the milling cutter 62 can completely cut the part of the tube body 5 that extends beyond the outer side of the outer circular fixing member 2.

[0052] In this embodiment, the first positioning groove 22 includes a guide groove 221 and a cutting groove 222. When the bearing 63 abuts against the inner wall of the guide groove 221, the milling cutter 62 is located in the cutting groove 222, and the milling cutter 62 reaches the required cutting depth on the tube body 5. When grooving the tube body 5, the bearing 63 is guided into the guide groove 221, so that the bearing 63 abuts against the guide groove 221. The guide groove 221 limits the milling cutter assembly 6, and the milling cutter 62 cuts a groove that meets the requirements on the tube body 5.

[0053] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tooling fixture, characterized in that, It includes a tube body fixing component (1), an outer circle fixing component (2), and an inner circle fixing component (3). The outer circle fixing component (2) and the inner circle fixing component (3) are slidably connected to the tube body fixing component (1). The outer circle fixing component (2) is provided with a through hole that allows the tube body (5) to pass through. The inner side of the through hole is a first outer circle positioning surface (21) that can abut against the outer wall of the tube body (5). The inner circle fixing component (3) is located in the through hole. The outer wall of the inner circle fixing component (3) is a first inner circle positioning surface (31) that can abut against the inner wall of the tube body (5).

2. The tooling fixture according to claim 1, characterized in that, The outer circular fixing member (2) is provided with a first positioning groove (22) that allows the milling cutter (62) to enter, and the inner circular fixing member (3) is provided with a second positioning groove (32) that allows the milling cutter (62) that enters the first positioning groove (22) to enter. The first positioning groove (22) and the second positioning groove (32) are connected.

3. The tooling fixture according to claim 2, characterized in that, The second positioning groove (32) penetrates the inner circle fixing member (3) radially. There are two first positioning grooves (22), and the two first positioning grooves (22) are respectively connected to the two ends of the second positioning groove (32).

4. The tooling fixture according to claim 2, characterized in that, It also includes a limiting block (122) and an elastic element (123). The tube body fixing element (1) has an annular fixing groove on the side opposite to the outer circle fixing element (2). The fixing groove has a second outer circle positioning surface (11) that abuts against the outer wall of the tube body (5) and a second inner circle positioning surface (12) that abuts against the inner wall of the tube body (5). The second inner circle positioning surface (12) has a limiting groove (121). The width of the limiting groove (121) is equal to that of the second positioning groove (32). One end of the elastic element (123) is connected to the bottom of the limiting groove (121), and the other end is connected to the limiting block (122). The sum of the lengths of the limiting block (122) and the elastic element (123) in the relaxed state is greater than the depth of the limiting groove (121). The width of the limiting block (122) is equal to the width of the second positioning groove (32).

5. The tooling fixture according to claim 4, characterized in that, The limiting groove (121) and the second positioning groove (32) are aligned along the axis of the tube body (5).

6. The tooling fixture according to claim 1, characterized in that, It also includes a drive mechanism (4), which is connected to both the outer circle fixing member (2) and the inner circle fixing member (3).

7. The tooling fixture according to claim 6, characterized in that, The drive mechanism (4) includes a drive shaft (41), an outer circular drive shaft (42), an inner circular drive shaft (43), and a gear set (44). The drive shaft (41) is fixedly connected to the input end of the gear set (44). The gear set (44) has two sets of output ends, which are fixedly connected to the outer circular drive shaft (42) and the inner circular drive shaft (43) respectively. The outer circular drive shaft (42) has a first thread, and the inner circular drive shaft (43) has a second thread. The outer circular fixing member (2) has a first threaded hole (25) that mates with the first thread, and the inner circular fixing member (3) has a second threaded hole (34) that mates with the second thread.

8. The tooling fixture according to claim 1, characterized in that, The tube body fixing component (1) is provided with a first guide post (13) and a second guide post (14), the outer circle fixing component (2) is provided with an outer circle guide hole (24), and the inner circle fixing component (3) is provided with an inner circle guide hole (33). The first guide post (13) passes through the outer circle guide hole (24), and the second guide post (14) passes through the inner circle guide hole (33).

9. A sample preparation apparatus, characterized in that, The device includes a machine base (7), a drive unit, a milling cutter assembly (6), and a tooling fixture as described in any one of claims 3 to 8, wherein the tube body fixing member (1), the outer circle fixing member (2), and the inner circle fixing member (3) are placed on the machine base (7), the milling cutter assembly (6) is mounted on the machine base (7), and the drive unit is connected to the milling cutter assembly (6).

10. The sample preparation apparatus according to claim 9, characterized in that, The milling cutter assembly (6) includes a tool holder (61) and a milling cutter (62). One end of the milling cutter (62) is rotatably connected to the tool holder (61). The output end of the drive device passes through the upper surface of the machine base (7) and is fixedly connected to the other end of the milling cutter (62). Bearings (63) are provided between the milling cutter (62) and the tool holder (61) and between the milling cutter (62) and the drive device. The top and bottom of the side of the outer circle fixing member (2) opposite to the milling cutter (62) are provided with limiting surfaces (23) that can abut against the bearings (63). The axial distance between the limiting surface (23) and the outer side surface of the outer circle fixing member (2) is equal to the radius difference between the milling cutter (62) and the bearing (63).

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