Polytetrafluoroethylene rod cutting device

Abstract

The utility model belongs to the polytetrafluoroethylene gasket production technical field, specifically provides a kind of polytetrafluoroethylene bar cutting device, including lathe, fixture, tool, position adjusting mechanism and guide component.The storage cavity is opened below the main shaft of lathe, and the material taking opening is opened in the lateral wall of storage cavity.Fixture is used to chuck the polytetrafluoroethylene bar to be cut, position adjusting mechanism drives tool to move, realizes the action of tool approach and tool retreat.Cutting produces polytetrafluoroethylene gasket and cutting chip drop to the first guide plate of guide component, under the double action of the first guide plate itself bevel and the vibration force additionally provided by vibration blanking unit, gasket and cutting chip drop into storage cavity.The first guide plate and vibration blanking unit of the application guide gasket and cutting chip drop into storage cavity, realize the automatic collection of cutting chip and gasket, can satisfy the use scene of large quantities of polytetrafluoroethylene bar cutting, help to improve the automation level of cutting operation.

Description

Technical Field

[0001] This application belongs to the field of polytetrafluoroethylene gasket production technology, specifically a polytetrafluoroethylene rod cutting device. Background Technology

[0002] Polytetrafluoroethylene (PTFE) gaskets possess corrosion resistance, high and low temperature resistance, and aging resistance, making them widely used in industrial sealing applications. Currently, PTFE gaskets are mainly produced through two methods: compression molding and machining. Compression molding involves placing powdered raw materials into a mold, pressing them into the gasket shape under high pressure using a molding machine, and then sintering them at high temperatures. Machining involves first molding PTFE powder into rods or tubes, and then using a lathe to machine the gaskets from the PTFE rods or tubes.

[0003] Both of the above production methods can produce PTFE gaskets, and the choice of method depends on the specific needs of the company. Generally speaking, compression molding is more suitable for manufacturing gaskets with high performance requirements, special shapes, and small order quantities. Turning, on the other hand, is better suited for the rapid and precise mass production of standard gaskets.

[0004] When producing PTFE gaskets using turning, the main equipment used is a CNC lathe. PTFE rods (which can be solid or hollow) are clamped onto the CNC lathe spindle, and the cutting tool is controlled to cut the rod to the appropriate thickness. The resulting gaskets and chips fall directly onto the worktable below. Current CNC lathes lack an automatic collection mechanism for these fallen gaskets and chips, requiring frequent cleaning during mass production; otherwise, it will affect the operation of the cutting tool feed mechanism. Utility Model Content

[0005] Based on the above-mentioned technical problems, this application provides a polytetrafluoroethylene rod cutting device to solve the technical problem of lack of automatic collection structure when cutting polytetrafluoroethylene rods with CNC lathes in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a polytetrafluoroethylene rod cutting device, comprising: A lathe has a horizontally arranged spindle connected to a fixture; the lathe has a storage cavity below the spindle, the top of the storage cavity is open, and the side wall of the lathe has a material handling port communicating with the storage cavity; A turning assembly includes a cutting tool and a position adjustment mechanism. The position adjustment mechanism is connected to the lathe and located above the top opening of the receiving cavity. The cutting tool is connected to the position adjustment mechanism, which drives the cutting tool to move in a horizontal direction parallel to or perpendicular to the central axis of the spindle. At least one side of the position adjustment mechanism has a gap with the top opening of the receiving cavity to form a blanking port. The material guiding assembly includes a first material guiding plate and a vibrating material dropping unit. One end of the first material guiding plate is located below the clamp, and the other end extends downward in a horizontal direction to above the material dropping port. The vibrating material dropping unit is disposed on the lower surface of the first material guiding plate.

[0007] In one possible implementation, the position adjustment mechanism includes: A translation unit includes a first slide table and a first driving member. The first slide table is slidably mounted on the lathe. The first driving member drives the first slide table to move horizontally in a direction parallel to the central axis of the spindle. At least one side of the first slide table has a gap with the top opening of the receiving cavity to form the material discharge port. The feeding unit includes a second slide and a second drive member. The second slide is slidably disposed on the first slide, and the second drive member is used to drive the second slide to move in a horizontal direction perpendicular to the central axis of the spindle. The cutting tool and the first guide plate are respectively connected to the second slide.

[0008] In one possible implementation, the material guiding assembly further includes a second material guiding plate connected to the second slide. The second material guiding plate is positioned above the material discharge port and is arranged in a vertical direction. The lower end of the second material guiding plate extends into the receiving cavity, and there is a gap between the second material guiding plate and the end of the first material guiding plate away from the main shaft.

[0009] In one possible implementation, the upper part of the second guide plate is vertically arranged, and the lower part of the second guide plate extends obliquely downward toward the interior of the receiving cavity.

[0010] In one possible implementation, the clamp is a three-jaw chuck.

[0011] In one possible implementation, the first guide plate has limiting plates on both sides parallel to its own tilting direction, which are higher than its own upper surface.

[0012] In one possible implementation, the position adjustment mechanism further includes a tool holder, on which the tool is fixedly mounted.

[0013] In one possible implementation, multiple cutting tools are spaced apart along a direction parallel to the central axis of the spindle.

[0014] In one possible implementation, the tool holder has a mounting groove along a direction parallel to the central axis of the spindle. The mounting groove is a T-shaped groove. A fixing member is slidably disposed in the mounting groove. The upper end of the fixing member has a screw extending out of the mounting groove. The tool has a clearance hole for the screw to pass through. The screw is threaded with a nut.

[0015] In one possible implementation, a filter plate is provided at the bottom of the receiving cavity, and the filter plate has drainage holes.

[0016] Compared with the prior art, the advantages of the polytetrafluoroethylene rod cutting device provided in this application are: The PTFE rod cutting device provided in this application includes a lathe, a fixture, a cutting tool, a position adjustment mechanism, and a material guide assembly. A receiving cavity is provided below the lathe spindle, and a material removal port is provided on the side wall of the receiving cavity for easy material removal. The fixture is used to clamp the PTFE rod to be cut. The position adjustment mechanism drives the cutting tool to move, realizing the infeed and retraction actions. The PTFE pads and chips generated during cutting fall onto the first guide plate of the material guide assembly. Under the combined action of the inclined surface of the first guide plate and the additional vibration force provided by the vibrating material dropping unit, the pads and chips fall into the receiving cavity. The operator can remove the chips and pads through the material removal port.

[0017] This application guides the pads and chips into the receiving cavity via a first guide plate and a vibrating feeding unit, achieving automatic collection of chips and pads. A material handling port is provided on the side wall of the receiving cavity, ensuring that material handling does not affect the normal operation of the lathe. This meets the needs of high-volume cutting of PTFE rods and helps improve the automation level of the cutting operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the polytetrafluoroethylene rod cutting device provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the polytetrafluoroethylene rod cutting device provided in the embodiments of this application. Figure 2 ; Figure 3This is an internal cross-sectional view of the polytetrafluoroethylene rod cutting device provided in the embodiments of this application; Figure 4 This is a structural diagram of the fixture, cutting tool, and material guiding assembly. Figure 5 This is a schematic diagram of the structure of the polytetrafluoroethylene rod cutting device provided in the embodiments of this application when two cutting tools are installed; Explanation of reference numerals in the attached figures: 10. Lathe; 11. Spindle; 12. Fixture; 13. Storage cavity; 131. Material pick-up port; 132. Material drop port; 14. Filter plate; 20. Turning assembly; 21. Cutting tool; 22. Position adjustment mechanism; 221. Translation unit; 2211. First slide; 2212. First drive component; 222. Feed unit; 2221. Second slide; 2222. Second drive component; 23. Tool holder; 231. Mounting slot; 232. Fixing component; 233. Nut; 30. Material guide assembly; 31. First guide plate; 311. Limiting plate; 32. Vibrating material drop unit; 33. Second guide plate; Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] Please refer to the following: Figures 1 to 5 The following describes the polytetrafluoroethylene rod cutting device provided in the embodiments of this application.

[0026] The polytetrafluoroethylene rod cutting device provided in this application includes a lathe 10, a turning assembly 20, and a material guiding assembly 30.

[0027] The lathe 10 is an existing horizontal CNC lathe 10, with a horizontally oriented spindle 11. The spindle 11 is connected to a fixture 12, which is an existing fixture such as a three-jaw chuck capable of clamping cylindrical materials. The fixture 12 is used to clamp polytetrafluoroethylene rods, such as solid polytetrafluoroethylene rods or hollow polytetrafluoroethylene tubes.

[0028] To facilitate the storage of the cut PTFE gaskets, the lathe 10 in this embodiment has a storage cavity 13 below the spindle 11. The top of the storage cavity 13 is open, and the side wall of the lathe 10 has a material handling port 131 communicating with the storage cavity 13. The operator can remove the PTFE gaskets and cutting chips through the material handling port 131. The storage cavity 13 has a large volume and can hold a large amount of material. There are no specific limitations on the shape of the storage cavity 13, the shape and size of the discharge port 132 and the material handling port 131, as long as they meet the usage requirements.

[0029] The turning assembly 20 is used to cut polytetrafluoroethylene (PTFE) rods and includes a conventional cutting tool 21 and a position adjustment mechanism 22. The position adjustment mechanism 22 is connected to the lathe 10 and located above the top opening of the receiving cavity 13. The cutting tool 21 is connected to the position adjustment mechanism 22, which drives the cutting tool 21 to move in a horizontal direction parallel to or perpendicular to the central axis of the spindle 11. The position adjustment mechanism can be a built-in structure of the CNC lathe 10, used to drive the cutting tool 21 to achieve translation, feed, and retraction actions. To ensure that the cut PTFE gaskets and chips can smoothly enter the receiving cavity 13, at least one side of the position adjustment mechanism has a gap with the top opening of the receiving cavity 13 to form a discharge port 132 for the gaskets and chips to fall.

[0030] The guiding assembly 30 guides the pads and chips to the discharge port 132. The guiding assembly 30 includes a first guiding plate 31 and a vibrating discharge unit 32. One end of the first guiding plate 31 is located below the clamp 12, and the other end extends horizontally downwards above the discharge port 132. The vibrating discharge unit 32 is located on the lower surface of the first guiding plate 31 and is a suitable vibrating motor in the prior art, capable of applying vibration force to the first guiding plate 31, causing the pads and chips to slide along the inclined surface formed by the first guiding plate 31. The vibrating discharge unit 32 can be turned on or off as needed; it can be turned off when automatic discharge is possible.

[0031] Compared with the prior art, the beneficial effects of the polytetrafluoroethylene rod cutting device provided in this application embodiment are: The polytetrafluoroethylene (PTFE) rod cutting device provided in this embodiment includes a lathe 10, a clamp 12, a cutting tool 21, a position adjustment mechanism 22, and a material guide assembly 30. A receiving cavity 13 is provided below the spindle 11 of the lathe 10, and a material removal port 131 is provided on the side wall of the receiving cavity 13 for easy material removal. The clamp 12 is used to clamp the PTFE rod to be cut, and the cutting tool 21 is driven to move by the position adjustment mechanism 22 to achieve the cutting and retraction actions. The PTFE pads and chips generated during cutting fall onto the first guide plate 31 of the material guide assembly 30. Under the combined action of the inclined surface of the first guide plate 31 and the additional vibration force provided by the vibrating material dropping unit 32, the pads and chips fall into the receiving cavity 13, and the operator can remove the chips and pads through the material removal port 131.

[0032] In this embodiment, the first guide plate 31 and the vibrating dropping unit 32 guide the pads and chips to fall into the receiving cavity 13, thereby achieving automatic collection of chips and pads. A material removal port 131 is provided on the side wall of the receiving cavity 13, so that the normal operation of the lathe 10 is not affected when removing materials. This can meet the application scenarios of cutting polytetrafluoroethylene rods in large quantities and help improve the automation level of the cutting operation.

[0033] Please see Figure 1 and Figure 2 In some possible embodiments, the position adjustment mechanism 22 includes a translation unit 221 that drives the tool 21 to move axially along the spindle 11, and a feed unit 222 that drives the tool 21 to perform feed and retraction actions.

[0034] The translation unit 221 includes a first slide 2211 and a first drive member 2212. The first slide 2211 is slidably mounted on the lathe 10. The first drive member 2212 is used to drive the first slide 2211 to move in a horizontal direction parallel to the central axis of the spindle 11. At least one side of the first slide 2211 has a gap with the top opening of the receiving cavity 13 to form a material discharge port 132. The feeding unit 222 includes a second slide 2221 and a second drive member 2222. The second slide 2221 is slidably mounted on the first slide 2211. The second drive member 2222 is used to drive the second slide 2221 to move in a horizontal direction perpendicular to the central axis of the spindle 11. The cutting tool 21 and the first guide plate 31 are respectively connected to the second slide 2221 and can move with the second slide 2221.

[0035] Both the first slide 2211 and the second slide 2221 can be made of cast iron, which has high structural strength and is durable. The first drive component 2212 and the second drive component 2222 can be existing pneumatic push rods, lead screw and slider mechanisms, linear stepper motors, or other mechanical structures that can output linear reciprocating motion. There are no specific restrictions on their specific structural type, size, or installation method.

[0036] Please see Figure 1 , Figure 3 and Figure 4 To ensure that the chips or pads fall smoothly into the receiving cavity 13, in addition to the first guide plate 31 and the vibrating dropping unit 32 in the above embodiment, the guiding assembly 30 also includes a second guide plate 33. The second guide plate 33 is connected to the second slide table 2221. The second guide plate 33 is located above the dropping port 132 and is arranged in the vertical direction. The lower end of the second guide plate 33 extends into the receiving cavity 13. There is a gap between the second guide plate 33 and the end of the first guide plate 31 away from the main shaft 11. The gap corresponds to the position of the dropping port 132. The width of the gap should allow the pads or chips to pass smoothly.

[0037] Both the second guide plate 33 and the first guide plate 31 can be made of thin steel plate or aluminum alloy plate. The second guide plate 33 can be set vertically or at a certain angle to the vertical direction, as long as it can prevent chips or shims from falling outside the range of the discharge port 132. The vibrating discharge unit 32 is a vibrating motor, which is fixed to the bottom of the first guide plate 31 by bolts or other connecting parts.

[0038] like Figure 4As shown, the upper part of the second guide plate 33 is vertically arranged, and the lower part of the second guide plate 33 extends obliquely downward toward the inside of the receiving cavity 13, which can guide the pad or chips into the receiving cavity 13. The second guide plate 33 and the first guide plate 31 are both fixed on the second slide table 2221 and can move with the second slide table 2221. During the movement of the second guide plate 33, it is always within the dropping range of the dropping port 132.

[0039] The first guide plate 31 has limiting plates 311 on both sides parallel to its own tilt direction, which are higher than its own upper surface, to prevent the gasket or chips from slipping off from both sides.

[0040] The position adjustment mechanism 22 also includes a tool holder 23, with the tool 21 fixedly mounted on the tool holder 23. The tool holder 23 is mounted on the second slide 2221. The tool holder 23 can be fixed to the second slide 2221 by welding or screw connection, and the tool 21 is fixed on the tool holder 23 by screw connection.

[0041] Please see Figure 5 To improve cutting efficiency, multiple cutters 21 can be spaced apart along a direction parallel to the central axis of the spindle 11. The distance between two adjacent cutters 21 is the thickness of the gasket to be cut. The cutter 21 is a cutting tool in the prior art, which can be used to cut polytetrafluoroethylene rods.

[0042] It should be noted that when multiple cutters 21 are used for cutting, the multiple cutters 21 can be located on the same straight line and contact the rod simultaneously during cutting. Alternatively, the multiple cutters 21 can be designed to be non-aligned, that is, during cutting, the cutter 21 closer to the end of the PTFE rod away from the clamp 12 contacts the rod first. During the feed of the cutter 21, in the direction from the PTFE end towards the clamp 12, the multiple cutters 21 contact the rod sequentially, with the position closer to the PTFE end being cut first and the position closer to the clamp 12 being cut later. This can improve the stability of cutting.

[0043] It is understandable that the number and arrangement of the cutting tools 21 can be selected according to the actual cutting efficiency and cutting quality, and no specific restrictions are imposed here.

[0044] Please see Figure 4 The tool holder 23 has a mounting groove 231 along a direction parallel to the central axis of the spindle 11. The mounting groove 231 is a T-shaped groove. A fixing member 232 is slidably disposed in the mounting groove 231. The upper end of the fixing member 232 has a screw extending out of the mounting groove 231. The tool 21 has a clearance hole for the screw to pass through. The screw is threaded with a nut 233. Tightening the nut 233 can fix the tool 21 on the tool holder 23. When it is necessary to replace the tool 21 or move the position of the tool 21, the nut 233 can be loosened.

[0045] When the cutting fluid needs to be sprayed to cool the tool 21 and the bar during the cutting process, in order to prevent the chips and gaskets from being soaked in the cutting fluid, a filter plate 14 can be installed at the bottom of the receiving cavity 13. The filter plate 14 has a water leakage hole, through which the cutting fluid can seep down. A bucket or other container can be used to collect the leaked cutting fluid.

[0046] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polytetrafluoroethylene rod cutting device, characterized in that, include: The lathe (10) has a horizontally arranged spindle (11) connected to a fixture (12); the lathe (10) has a storage cavity (13) below the spindle (11), the top of the storage cavity (13) is open, and the side wall of the lathe (10) has a material loading port (131) communicating with the storage cavity (13). The turning assembly (20) includes a cutting tool (21) and a position adjustment mechanism (22). The position adjustment mechanism (22) is connected to the lathe (10) and is located above the top opening of the receiving cavity (13). The cutting tool (21) is connected to the position adjustment mechanism (22). The position adjustment mechanism (22) is used to drive the cutting tool (21) to move in a horizontal direction parallel or perpendicular to the central axis of the spindle (11). At least one side of the position adjustment mechanism (22) has a gap with the top opening of the receiving cavity (13) to form a blanking port (132). as well as The material guiding assembly (30) includes a first material guiding plate (31) and a vibrating material dropping unit (32). One end of the first material guiding plate (31) is located below the clamp (12), and the other end extends downward in a horizontal direction to above the material dropping port (132). The vibrating material dropping unit (32) is located on the lower surface of the first material guiding plate (31).

2. The polytetrafluoroethylene rod cutting device according to claim 1, characterized in that, The position adjustment mechanism (22) includes: The translation unit (221) includes a first slide (2211) and a first drive member (2212). The first slide (2211) is slidably disposed on the lathe (10). The first drive member (2212) is used to drive the first slide (2211) to move in a horizontal direction parallel to the central axis of the spindle (11). At least one side of the first slide (2211) has a gap with the top opening of the receiving cavity (13) to form the discharge port (132). The feed unit (222) includes a second slide (2221) and a second drive member (2222). The second slide (2221) is slidably disposed on the first slide (2211). The second drive member (2222) is used to drive the second slide (2221) to move in a horizontal direction perpendicular to the central axis of the spindle (11). The cutter (21) and the first guide plate (31) are respectively connected to the second slide (2221).

3. The polytetrafluoroethylene rod cutting device according to claim 2, characterized in that, The material guiding assembly (30) further includes a second material guiding plate (33), which is connected to the second slide (2221). The second material guiding plate (33) is located above the material discharge port (132) and is arranged in the vertical direction. The lower end of the second material guiding plate (33) extends into the storage cavity (13). There is a gap between the second material guiding plate (33) and the end of the first material guiding plate (31) away from the main shaft (11).

4. The polytetrafluoroethylene rod cutting device according to claim 3, characterized in that, The upper part of the second guide plate (33) is vertically arranged, and the lower part of the second guide plate (33) extends obliquely downward toward the inside of the receiving cavity (13).

5. The polytetrafluoroethylene rod cutting device according to claim 1, characterized in that, The clamp (12) is a three-jaw chuck.

6. The polytetrafluoroethylene rod cutting device according to claim 1, characterized in that, The first guide plate (31) has limiting plates (311) on both sides parallel to its own tilt direction, which are higher than its own upper surface.

7. The polytetrafluoroethylene rod cutting device according to claim 1, characterized in that, The position adjustment mechanism (22) also includes a tool holder (23), and the tool (21) is fixedly mounted on the tool holder (23).

8. The polytetrafluoroethylene rod cutting device according to claim 7, characterized in that, The cutting tools (21) are arranged in multiple intervals along a direction parallel to the central axis of the spindle (11).

9. The polytetrafluoroethylene rod cutting device according to claim 7 or 8, characterized in that, The tool holder (23) has a mounting groove (231) in a direction parallel to the central axis of the spindle (11). The mounting groove (231) is a T-shaped groove. A fixing member (232) is slidably disposed in the mounting groove (231). The upper end of the fixing member (232) has a screw extending out of the mounting groove (231). The tool (21) has a clearance hole for the screw to pass through. The screw is threaded with a nut (233).

10. The polytetrafluoroethylene rod cutting device according to claim 1, characterized in that, A filter plate (14) is provided at the bottom of the storage cavity (13), and a water leakage hole is provided on the filter plate (14).

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