A detachable milling cutter for PVC pipe tensile test

Abstract

The utility model discloses a detachable milling cutter for PVC pipe tensile test, concretely relates to PVC pipe tensile test field, including fixed base and a plurality of milling cutter, the fixed base's bottom fixed mounting has fixed nut, the bottom of mounting plate is opened with two first fixed holes symmetry, the bottom fixed mounting of mounting plate has the installing rod, the bottom fixed mounting of installing rod has the threaded rod, and a plurality of milling cutter respectively sets up in the outside of threaded rod, the fixed nut is threadedly connected with threaded rod. The utility model in when using, simple operation, through fixed nut and threaded rod threadedly connected, cooperate spring push -and -hold limiting rod and insert milling cutter second fixed hole in limiting device, realize milling cutter group stable installation and prevent nut loose, guarantee processing accuracy, with the help of pull rod and handle, and can remove the limit by pulling, quick detachable replacement damaged milling cutter, need not complex tool, shorten maintenance time, reduce labor intensity, improve maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing of PVC pipes, and more specifically, it relates to a detachable milling cutter for tensile testing of PVC pipes. Background Technology

[0002] The tensile test of PVC pipes involves applying an axial tensile load to PVC pipes and measuring their mechanical properties (such as tensile strength, elongation at break, yield strength, etc.). This assesses the pipes' resistance and deformation characteristics under tension, providing data support for the quality control, material selection, and engineering applications of PVC pipes.

[0003] Traditional cutting tools are a single piece. During the preparation of tensile specimens of PVC pipes, the high toughness of PVC material makes it easy to damage the cutting edge (causing a notch). After the damage occurs, the specimen will have micro-defects during the milling process, resulting in inaccurate test data and the need to replace the milling cutter. This leads to extremely low effective utilization of the milling cutter and serious waste.

[0004] Therefore, it is necessary to redesign a detachable milling cutter for tensile testing of PVC pipes to address the above-mentioned issues. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a detachable milling cutter for tensile testing of PVC pipes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A detachable milling cutter for tensile testing of PVC pipes includes a fixed base and multiple milling cutters. A mounting plate is fixedly installed at the bottom end of the fixed base. Two first fixing holes are symmetrically formed at the bottom end of the mounting plate. A mounting rod is fixedly installed at the bottom end of the mounting plate. A threaded rod is fixedly installed at the bottom end of the mounting rod, and multiple milling cutters are respectively sleeved on the outside of the threaded rod. A fixing nut is threadedly connected to the threaded rod. Two mounting cavities are symmetrically formed inside the fixing nut. Each mounting cavity is equipped with a limiting device. Two second fixing holes are symmetrically formed at the bottom end of each milling cutter, and the output ends of the two limiting devices are respectively connected to the two second fixing holes at the bottom end. Two fixing rods are symmetrically fixedly installed on the upper end face of each milling cutter, and the two fixing rods at the top end are respectively connected to the two first fixing holes.

[0007] In a preferred embodiment, each of the limiting devices includes a spring, and the spring is fixedly installed on the inner bottom wall of the mounting cavity. A connecting block is fixedly installed on one end of the spring, and the connecting block is slidably connected in the mounting cavity. A limiting rod is fixedly installed on the end of the connecting block away from the spring, and the limiting rod slides through the inner top wall of the mounting cavity and is inserted into the second fixing hole at the corresponding position.

[0008] In a preferred embodiment, a tie rod is fixedly installed at the bottom end of each connecting block, and the two tie rods slide through the inner bottom wall of the mounting cavity and extend outward.

[0009] In a preferred embodiment, two fixing rods on the lower end of the milling cutter are respectively inserted into two second fixing holes at the bottom end of the upper end of the milling cutter.

[0010] In a preferred embodiment, the outer diameter of the retaining nut is smaller than the outer diameter of the milling cutter.

[0011] In a preferred embodiment, a handle is fixedly installed at the bottom end of each of the pull rods.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a limiting device, a fixing rod, a first fixing hole, a second fixing hole, a threaded rod, a fixing nut, etc., and by connecting the fixing nut with the threaded rod, combined with the spring in the limiting device pushing the limiting rod into the second fixing hole of the milling cutter, not only achieves stable installation of the milling cutter assembly on the fixing rod, but also effectively prevents the fixing nut from loosening.

[0013] 2. This utility model, by setting up a pull rod, a limiting device, etc., and with the cooperation of the pull rod and the handle, only the handle needs to be pulled to overcome the spring force, so that the limiting rod can be disengaged from the second fixing hole, and the limiting lock on the milling cutter can be quickly released. This allows the damaged milling cutter to be disassembled and replaced in a short time without complicated tools or cumbersome operations, shortening the equipment maintenance time, reducing the labor intensity of operators, and significantly improving the efficiency of milling cutter use and maintenance.

[0014] In summary, this utility model is simple to operate. By connecting the fixing nut and the threaded rod with a thread, and with the spring in the limiting device pushing the limiting rod into the second fixing hole of the milling cutter, the milling cutter assembly is stably installed and the nut is prevented from loosening, ensuring machining accuracy. With the help of the pull rod and handle, the limiting can be released by pulling, and the damaged milling cutter can be quickly disassembled and replaced. No complicated tools are required, which shortens maintenance time, reduces labor intensity, and improves maintenance efficiency. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of a detachable milling cutter for tensile testing of PVC pipes proposed in this utility model; Figure 2 This is a schematic diagram of the fixing rod part of a detachable milling cutter for tensile testing of PVC pipes proposed in this utility model; Figure 3 This is a schematic diagram of the milling cutter portion of a detachable milling cutter for tensile testing of PVC pipes proposed in this utility model; Figure 4 This is a schematic diagram of the fixing nut part of a detachable milling cutter for tensile testing of PVC pipes proposed in this utility model; Figure 5 This is a schematic diagram of the mounting cavity of a detachable milling cutter for tensile testing of PVC pipes proposed in this utility model.

[0016] In the diagram: 1. Fixed base; 2. Mounting plate; 3. Fixing nut; 4. Milling cutter; 5. Mounting rod; 6. Threaded rod; 7. First fixing hole; 8. Fixing rod; 9. Second fixing hole; 10. Limiting rod; 11. Handle; 12. Mounting cavity; 13. Spring; 14. Connecting block; 15. Pull rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1-5A detachable milling cutter for tensile testing of PVC pipes includes a fixed base 1 and multiple milling cutters 4. A mounting plate 2 is fixedly installed at the bottom end of the fixed base 1. Two first fixing holes 7 are symmetrically opened at the bottom end of the mounting plate 2. A mounting rod 5 is fixedly installed at the bottom end of the mounting plate 2. A threaded rod 6 is fixedly installed at the bottom end of the mounting rod 5. Multiple milling cutters 4 are respectively sleeved on the outside of the threaded rod 6. A fixing nut 3 is threadedly connected to the threaded rod 6. Two mounting cavities 12 are symmetrically opened inside the fixing nut 3. Each mounting cavity 12 is equipped with a limiting device. Each milling cutter 4 has a symmetrically opened... There are two second fixing holes 9, and the output ends of the two limiting devices are respectively connected to the two second fixing holes 9 located at the bottom. Two fixing rods 8 are symmetrically fixedly installed on the upper end face of each milling cutter 4, and the two fixing rods 8 located at the top are respectively connected to the two first fixing holes 7. The two fixing rods 8 on the lower milling cutter 4 are respectively inserted into the two second fixing holes 9 at the bottom of the upper milling cutter 4. Multiple milling cutters 4 are sleeved on the outside of the threaded rod 6. The fixing rods 8 on the upper end face of the lower milling cutter 4 are inserted into the second fixing holes 9 at the bottom of the upper milling cutter 4, forming a nested structure similar to a tenon and mortise. This design not only achieves rapid positioning and installation of the milling cutters 4, but also effectively transmits torque during milling, ensuring that each layer of milling cutters 4 rotates synchronously, avoiding misalignment or slippage.

[0019] Each limiting device includes a spring 13, which is fixedly installed on the inner bottom wall of the mounting cavity 12. A connecting block 14 is fixedly installed on one end of the spring 13, and the connecting block 14 is slidably connected in the mounting cavity 12. A limiting rod 10 is fixedly installed on the end of the connecting block 14 away from the spring 13, and the limiting rod 10 slides through the inner top wall of the mounting cavity 12 and is inserted into the second fixing hole 9 corresponding to the position. The spring 13, which is in a compressed state, continuously applies a pushing force to the connecting block 14, so that the limiting rod 10 is inserted into the second fixing hole 9 of the bottom milling cutter 4.

[0020] Each connecting block 14 has a pull rod 15 fixedly installed at its bottom end, and the two pull rods 15 slide through the inner bottom wall of the mounting cavity 12 and extend outward. Each pull rod 15 has a handle 11 fixedly installed at its bottom end. The combination design of the pull rod 15 and the handle 11 greatly improves the ease of disassembling the milling cutter 4. When the milling cutter 4 needs to be replaced, the operator only needs to pull the handle 11, which will drive the connecting block 14 to overcome the elastic force of the spring 13 through the pull rod 15, so that the limiting rod 10 can be pulled out from the second fixing hole 9, and the milling cutter 4 can be easily removed from the threaded rod 6.

[0021] The outer diameter of the fixing nut 3 is smaller than the outer diameter of the milling cutter 4.

[0022] In use, the mounting rod 5 of the mounting plate 2 is passed through two symmetrically opened first fixing holes 7 at its bottom end. At this time, the threaded rod 6 at the bottom end of the mounting rod 5 is aligned with the fixing nut 3 fixedly installed at the bottom end of the fixing seat 1. By rotating the fixing nut 3, the fixing seat 1 and the mounting plate 2 are tightly fixed together by means of threaded connection. Multiple milling cutters 4 are slidably sleeved on the outside of the threaded rod 6 through the central hole to form a stacked structure. The two fixing rods 8 on the upper end face of the lower milling cutter 4 are respectively inserted into the two second fixing holes 9 at the bottom end of the upper milling cutter 4 to achieve the initial positioning and connection between the milling cutters 4.

[0023] In the limiting device, the compressed spring 13 is fixed to the bottom wall of the mounting cavity 12, with one end connected to the connecting block 14. A continuous pushing force is applied to the connecting block 14. A limiting rod 10, fixedly installed at the end of the connecting block 14 away from the spring 13, slides through the top wall of the mounting cavity 12 under the pushing force of the spring 13, precisely inserting into the second fixing hole 9 corresponding to the bottom end of the bottom milling cutter 4. This process not only restricts the axial movement of the milling cutter assembly on the threaded rod 6, ensuring the stability of the milling cutter 4 during operation, but also, through the cooperation of the limiting rod 10 and the second fixing hole 9, prevents the fixing nut 3 from loosening, maintaining the reliability of the entire structure.

[0024] When the milling cutter 4 is damaged and needs to be replaced, pull the handle 11 at the bottom of the pull rod 15. The pull rod 15 drives the connecting block 14 to overcome the elastic force of the spring 13 and slide towards the bottom wall of the mounting cavity 12, causing the limiting rod 10 to be pulled out from the second fixing hole 9, thus releasing the limiting lock on the milling cutter 4. At this time, the milling cutter 4, which is no longer constrained, can be easily removed from the threaded rod 6, making it convenient to replace the damaged milling cutter 4. When installing a new milling cutter 4, simply slip the milling cutter 4 onto the threaded rod 6 in sequence, adjust the position, and then release the handle 11. The spring 13 will then push the connecting block 14 and the limiting rod 10 to reset, allowing them to be reinserted into the second fixing hole 9, quickly completing the fixed installation of the milling cutter 4 and restoring the equipment to its working state.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable milling cutter for tensile testing of PVC pipes, comprising a fixed base (1) and multiple milling cutters (4), characterized in that: The bottom end of the fixed base (1) is fixedly installed with a mounting plate (2). The bottom end of the mounting plate (2) has two first fixing holes (7) symmetrically opened. The bottom end of the mounting plate (2) is fixedly installed with a mounting rod (5). The bottom end of the mounting rod (5) is fixedly installed with a threaded rod (6). Multiple milling cutters (4) are respectively sleeved on the outside of the threaded rod (6). The threaded rod (6) is threadedly connected with a fixing nut (3). The inside of the fixing nut (3) has two symmetrically opened mounting cavities (12). Each mounting cavity (12) is provided with a limiting device. Each milling cutter (4) has two second fixing holes (9) symmetrically opened at its bottom end, and the output ends of the two limiting devices are respectively connected to the two second fixing holes (9) located at the bottom end. Each milling cutter (4) has two fixing rods (8) symmetrically fixedly installed on its upper end face, and the two fixing rods (8) located at the top end are respectively connected to the two first fixing holes (7).

2. The detachable milling cutter for tensile testing of PVC pipes according to claim 1, characterized in that: Each of the limiting devices includes a spring (13), and the spring (13) is fixedly installed on the inner bottom wall of the mounting cavity (12). A connecting block (14) is fixedly installed at one end of the spring (13), and the connecting block (14) is slidably connected in the mounting cavity (12). A limiting rod (10) is fixedly installed at the end of the connecting block (14) away from the spring (13), and the limiting rod (10) slides through the inner top wall of the mounting cavity (12) and is inserted into the second fixing hole (9) at the corresponding position.

3. The detachable milling cutter for tensile testing of PVC pipes according to claim 2, characterized in that: Each of the connecting blocks (14) is fixedly installed with a pull rod (15) at its bottom end, and the two pull rods (15) slide through the inner bottom wall of the mounting cavity (12) and extend outward.

4. The detachable milling cutter for tensile testing of PVC pipes according to claim 1, characterized in that: The two fixing rods (8) on the lower milling cutter (4) are respectively inserted into the two second fixing holes (9) at the bottom end of the upper milling cutter (4).

5. A detachable milling cutter for tensile testing of PVC pipes according to claim 1, characterized in that: The outer diameter of the fixing nut (3) is smaller than the outer diameter of the milling cutter (4).

6. A detachable milling cutter for tensile testing of PVC pipes according to claim 3, characterized in that: Each of the aforementioned pull rods (15) has a handle (11) fixedly installed at its bottom end.

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