A polishing device for friction and wear samples of textile crochet needles and a method for producing the same

Abstract

The application relates to the technical field of textile crochet production, in particular to a friction and wear sample polishing device for textile crochet needles, which comprises a supporting frame, a driving piece and a rotating disc, a plurality of placing grooves are formed in the rotating disc, clamping assemblies for fixing the textile crochet needles are arranged on the placing grooves, an extrusion assembly for extruding a fixing agent is arranged at the upper end of the rotating disc, a polishing assembly for polishing the textile crochet needles is arranged at the upper end of the rotating disc, a negative pressure assembly for sucking out the fixing agent is arranged at the lower end of the rotating disc, and guide rails for controlling the clamping and loosening of the clamping assemblies are arranged on the rotating disc; the device can fix crochet needles of various shapes, and can only fix crochet needles of a single type, so the use range is small.

Description

Technical Field

[0001] This invention relates to the field of textile crochet needle production technology, specifically to a polishing device for friction and wear samples of textile crochet needles and its preparation method. Background Technology

[0002] Textile crochet needles are key components of precision textile equipment such as single and double-sided circular knitting machines, small circular knitting machines, rib knitting machines, computerized jacquard machines, and high-precision single and double-sided spandex knitting machines. A Chinese utility model patent with application publication number CN219380209U discloses a polishing device for knitting needle processing, including a limiting base, a limiting top seat, a first knitting needle limiting sleeve, and a second knitting needle limiting sleeve. The first and second knitting needle limiting sleeves limit the position of the knitting needle, while the limiting top seat is installed outside the second knitting needle limiting sleeve for further limiting. A motor drives a first gear to rotate, and a polishing belt polishes the outside of the knitting needle. Multiple sets of first knitting needle limiting sleeves can be installed inside the limiting base, meaning the device can polish multiple knitting needles simultaneously, thereby increasing polishing efficiency.

[0003] However, the inventors discovered that in actual use, the device's clamping mechanism could not fix various different shapes of hooks, but could only fix a single type of hook, thus limiting its application range. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies. By providing a clamping assembly for fixing textile hooks in a placement slot, and by creating a fixing slot a for placing hooks on the lower clamping block, and a corresponding fixing slot b on the lower end of the upper clamping block, the invention addresses the limitations of existing clamping devices. This invention utilizes a clamping assembly that can fix hooks of various shapes, solving the problem that existing clamping devices cannot fix hooks of different shapes and can only fix a single type of hook, thus limiting their application range.

[0005] To address the aforementioned technical problems, the present invention adopts the following technical solution:

[0006] A polishing device for friction and wear samples of textile crochet needles includes a support frame, a driving component, and a turntable driven by the driving component. The turntable has several placement slots, and clamping components for fixing textile crochet needles are provided in the placement slots. An extrusion component for extruding a fixing agent is provided at the upper end of the turntable. A polishing component for polishing textile crochet needles is provided at the upper end of the turntable. A negative pressure component for sucking out the fixing agent is provided at the lower end of the turntable. A guide rail for controlling the clamping and releasing of the clamping components is provided on the turntable.

[0007] As a preferred embodiment, the clamping assembly includes a lower clamping block disposed within a placement groove and an upper clamping block slidably disposed on the lower clamping block. A slide rail is provided at the rear end of the lower clamping block, and a spring is provided between the upper clamping block and the slide rail. A fixing groove a for placing a textile hook is provided on the lower clamping block, and a placement block a is disposed within the fixing groove a. A slot a is provided at the front end of the fixing groove a for the textile hook to pass through. A liquid suction hole is provided at the rear end of the lower clamping block, and a liquid outlet channel is provided between the liquid suction hole and the fixing groove a. A heating element is provided in both the lower and upper clamping blocks.

[0008] As a preferred embodiment, the lower end of the upper clamping block is provided with a fixing groove b corresponding to the fixing groove a, a placement block b is provided in the fixing groove b, the front end of the fixing groove b is provided with a slot hole a for the textile hook needle to pass through, the upper clamping block is provided with a guide rod and a liquid injection pipe, and a liquid injection channel is provided between the liquid injection pipe and the fixing groove b.

[0009] As a preferred embodiment, the extrusion assembly includes an injection molding machine, a drive unit disposed within the injection molding machine, and an auger driven by the drive unit. An injection pipe is provided at the lower end of the injection molding machine, a feed pipe is provided on the side wall of the injection molding machine, and a feed hopper is provided at the upper end of the feed pipe.

[0010] As a preferred option, the fixing agent in the extruder is polyurethane.

[0011] As a preferred embodiment, the polishing assembly includes a lower polishing component, an upper polishing component, and a polishing robot, wherein both the lower polishing component and the upper polishing component are provided with a plurality of polishing blocks.

[0012] As a preferred embodiment, the negative pressure assembly includes a negative pressure chamber and a negative pressure pipe slidably disposed at the upper end of the negative pressure chamber.

[0013] As a preferred embodiment, the guide rail is provided with a feeding section, an injection molding section, a grinding section, a negative pressure section, and a transition section in sequence.

[0014] As another preferred embodiment, the lower end of the turntable is provided with several suction tubes corresponding to the suction holes.

[0015] A method for preparing a friction and wear specimen for textile crochet needles, using a polishing device for a friction and wear specimen for textile crochet needles, includes the following steps:

[0016] a. Material selection process: Based on the service conditions of textile crochet hooks, T10 steel is selected as the material;

[0017] b. Stamping process: The textile crochet hook is stamped into shape using a stamping machine and then ground using a polishing machine;

[0018] c. Polishing process: A robotic arm places the textile hook into the placement groove. The upper clamping block is pressed down by the guide rail, making it fit tightly with the lower clamping block. The fixing agent is heated by the injection molding machine. The driving component drives the auger to rotate and extrude the fixing agent. The fixing agent is injected into the injection tube through the injection tube and flows into the fixing grooves a and b through the injection channel. The textile hook is fixed by the cooled and solidified fixing agent. The surface of the textile hook is polished by the grinding component. The fixing agent is heated by the lower and upper clamping blocks to melt it. The fixing agent is sucked out from the suction tube through the negative pressure tube and stored in the negative pressure chamber. The robotic arm takes out the textile hook and sends it to the next station.

[0019] d. The superhardening process involves placing textile hooks into a nitriding furnace for isothermal nitriding. Two hours before the end of nitriding, a denitrification process is performed, with the denitrification temperature increased to 500°C. The samples are then cooled in the nitriding furnace and subsequently lightly ground and polished.

[0020] e. Simulate working conditions and processes. Based on the actual working conditions of textile crochet needles, the friction and wear testing machine, reciprocating MDW-02, is selected for the test. The accelerated test is used to destroy the crochet needle, thereby simulating fatigue damage after long-term use.

[0021] The beneficial effects of this invention are:

[0022] 1. In this invention, a clamping assembly for fixing textile hooks is provided on the placement groove. A fixing groove a for placing hooks is opened on the lower clamping block, and a fixing groove b corresponding to fixing groove a is opened at the lower end of the upper clamping block. The fixing agent is heated by an injection molding machine, and the fixing agent is extruded by driving the auger to rotate through the driving component. The fixing agent is injected into the injection tube through the injection tube and flows into fixing groove a and fixing groove b through the injection channel. The textile hooks are fixed by the fixing agent after cooling and solidification, so that the clamping assembly can fix hooks of various shapes.

[0023] In summary, this equipment has the advantage of clamping and fixing crochet hooks of various shapes, and is especially suitable for the field of textile crochet hook production technology. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a polishing device for friction and wear test samples of textile crochet needles;

[0026] Figure 2 A front view of a polishing device for friction and wear test specimens of textile crochet needles;

[0027] Figure 3 This is a cross-sectional view of the lower clamping block;

[0028] Figure 4 This is a cross-sectional view of the upper clamping block;

[0029] Figure 5 This is a cross-sectional schematic diagram of the extruded component;

[0030] Figure 6 This is a structural diagram of the polishing component;

[0031] Figure 7 This is a schematic diagram of the guide rail structure;

[0032] Figure 8 This is a structural diagram of the turntable;

[0033] Figure 9 A process flow diagram for a polishing device for friction and wear test samples of textile crochet needles;

[0034] Figure 10 This is a wear profile measurement diagram;

[0035] Figure 11 3D model of wear profile measurement;

[0036] Figure 12 This is the outline of point 1;

[0037] Figure 13 The outline of point 2;

[0038] Figure 14 This is the outline of point 3.

[0039] 1. Support frame; 2. Drive component; 3. Turntable; 4. Clamping assembly; 5. Textile hook; 6. Extrusion assembly; 7. Grinding assembly; 8. Negative pressure assembly; 9. Guide rail; 31. Placement slot; 32. Suction tube; 41. Lower clamping block; 42. Upper clamping block; 43. Spring; 61. Injection molding machine; 62. Drive component; 63. Screwdriver; 64. Injection tube; 65. Feed tube; 71. Lower grinding component; 72. Upper grinding component; 73. Grinding block; 8 1. Negative pressure chamber; 82. Negative pressure pipe; 91. Feeding section; 92. Injection molding section; 93. Grinding section; 94. Negative pressure section; 95. Transition section; 411. Slide rail; 412. Fixed groove a; 413. Placement block a; 414. Slot hole a; 415. Liquid suction hole; 416. Liquid outlet channel; 421. Fixed groove b; 422. Placement block b; 423. Slot hole a; 424. Guide rod; 425. Liquid injection pipe; 426. Liquid injection channel. Detailed Implementation

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0041] Example 1

[0042] like Figures 1 to 8 As shown, a polishing device for friction and wear samples of textile crochet needles includes a support frame 1, a driving component 2, and a turntable 3 driven by the driving component 2. The turntable 3 has several placement slots 31, and clamping components 4 for fixing textile crochet needles 5 are provided on the placement slots 31. An extrusion component 6 for extruding a fixing agent is provided at the upper end of the turntable 3. A polishing component 7 for polishing the textile crochet needles 5 is provided at the upper end of the turntable 3. A negative pressure component 8 for sucking out the fixing agent is provided at the lower end of the turntable 3. A guide rail 9 for controlling the clamping components 4 to release the clamping force is provided on the turntable 3.

[0043] It is worth mentioning that by setting a clamping assembly 4 for fixing the textile hook 5 on the placement groove 31, by opening a fixing groove a412 for placing the textile hook 5 on the lower clamping block 41, and opening a fixing groove b421 corresponding to the fixing groove a412 at the lower end of the upper clamping block 42, the fixing agent is heated by the injection molding machine 61, and the fixing agent is extruded by driving the auger 63 to rotate through the driving component 62. The fixing agent is injected into the injection pipe 425 through the injection tube 64, and flows into the fixing groove a412 and the fixing groove b421 through the injection channel 426. The textile hook 5 is fixed by the fixed agent after cooling and solidification, so that the clamping assembly can fix hooks of various shapes.

[0044] like Figure 3As shown, the clamping assembly 4 includes a lower clamping block 41 disposed in the placement groove 31 and an upper clamping block 42 slidably disposed on the lower clamping block 41. The rear end of the lower clamping block 41 is provided with a slide rail 411. A spring 43 is provided between the upper clamping block 42 and the slide rail 411. A fixing groove a412 for placing a textile hook needle 5 is opened on the lower clamping block 41. A placement block a413 is disposed in the fixing groove a412. A slot hole a414 for the textile hook needle 5 to pass through is opened at the front end of the fixing groove a412. A liquid suction hole 415 is opened at the rear end of the lower clamping block 41. A liquid outlet channel 416 is provided between the liquid suction hole 415 and the fixing groove a412. A heating element is provided in both the lower clamping block 41 and the upper clamping block 42.

[0045] In this example, the clamping assembly 4 can clamp textile hooks 5 of various shapes by setting the fixing groove a412. The upper clamping block 42 can be reset after being pressed down by setting the spring 43. The fixative can be drawn out from the liquid suction hole 415 and the liquid outlet channel 416 into the liquid suction tube 32, and then enter the negative pressure tube 82 through the liquid suction tube 32. The placement block a413 can limit the textile hook 5 to prevent it from tilting. The groove a414 is only for the textile hook 5 to pass through, and the fixative will not overflow from it.

[0046] like Figure 4 As shown, the lower end of the upper clamping block 42 is provided with a fixing groove b421 corresponding to the fixing groove a412. A placement block b422 is provided in the fixing groove b421. The front end of the fixing groove b421 is provided with a slot hole a423 for the textile hook needle 5 to pass through. The upper clamping block 42 is provided with a guide rod 424 and an injection pipe 425. An injection channel 426 is provided between the injection pipe 425 and the fixing groove b421.

[0047] In this example, by setting the fixing groove b421, the clamping component 4 can clamp textile hooks 5 of various shapes. The placement block b422 can limit the textile hooks 5 to prevent them from tilting. The slot a423 is only for the textile hooks 5 to pass through, and the fixative will not overflow from it.

[0048] like Figure 5 As shown, the extrusion assembly 6 includes an injection molding machine 61, a drive unit 62 disposed inside the injection molding machine, and an auger 63 driven by the drive unit 62. An injection pipe 64 is disposed at the lower end of the injection molding machine 61, and a feed pipe 65 is disposed on the side wall of the injection molding machine 61. A feed hopper is disposed at the upper end of the feed pipe 65.

[0049] The fixative in the injection molding machine 61 is polyurethane.

[0050] In this example, polyurethane was chosen as the fixative because it has good plasticity and high hardness after solidification, which prevents the textile hook 5 from shaking during polishing.

[0051] like Figure 6 As shown, the polishing assembly 7 includes a lower polishing component 71, an upper polishing component 72, and a polishing robot. Both the lower polishing component 71 and the upper polishing component 72 are provided with a plurality of polishing blocks 73.

[0052] like Figure 2 As shown, the negative pressure assembly 8 includes a negative pressure chamber 81 and a negative pressure pipe 82 that is slidably disposed at the upper end of the negative pressure chamber 81.

[0053] like Figure 7 As shown, the guide rail 9 is sequentially provided with a feeding section 91, an injection molding section 92, a grinding section 93, a negative pressure section 94, and a transition section 95.

[0054] like Figure 2 As shown, the lower end of the turntable 3 is provided with several suction tubes 32 corresponding to the suction holes 415.

[0055] Example 2

[0056] As shown in Figures 1-2, a method for preparing a friction and wear specimen for textile crochet needles, using a polishing device for such specimens, includes the following steps:

[0057] a. Material selection process: Based on the service conditions of textile crochet hook 5, T10 steel was selected as the material;

[0058] In this example, the advantages of choosing T10 steel are good machinability and easy availability; however, it has low hardenability, average wear resistance, and large quenching deformation.

[0059] b. Stamping process: The textile hook needle 5 is stamped into shape by a stamping machine and then ground by a polishing machine;

[0060] c. Polishing process: The robotic arm places the textile hook 5 into the placement groove 31. The guide rail 9 drives the upper clamping block 42 to press down and fit tightly with the lower clamping block 41. The injection molding machine 61 heats the fixative. The drive component 62 drives the auger 63 to rotate and extrude the fixative. The fixative is injected into the injection pipe 425 through the injection tube 64 and flows into the fixing groove a412 and fixing groove b421 through the injection channel 426. The textile hook 5 is fixed by the cooled and solidified fixative. The surface of the textile hook 5 is polished by the grinding component 7. The lower clamping block 41 and the upper clamping block 42 heat the fixative to melt it. The fixative is sucked out from the suction pipe 32 through the negative pressure pipe 82 and stored in the negative pressure chamber 81. The robotic arm takes out the textile hook 5 and sends it to the next station.

[0061] In this example, grinding and polishing are used to improve the surface finish of the working part of the hook needle, so that the roughness reaches Ra0.1μm.

[0062] d. The super-hard and toughened treatment process involves placing the textile hook needle 5 into a nitriding furnace for isothermal nitriding. Two hours before the end of nitriding, a denitrification treatment is performed, with the denitrification temperature increased to 550℃. The sample is then cooled in the nitriding furnace and subsequently lightly ground and polished.

[0063] In this example, to ensure uniform nitriding, the sample was suspended and centered to ensure uniform nitrided white layer thickness. The nitrided sample was lightly ground and polished to maintain a roughness of Ra0.1μm.

[0064] e. Simulate working conditions and processes. Based on the actual working conditions of textile crochet needles, the friction and wear testing machine, reciprocating MDW-02, is selected for the test. The accelerated test is used to destroy the crochet needle, thereby simulating fatigue damage after long-term use.

[0065] In this example, the wear profile of the specimen after the test is measured as follows: Figure 10 As shown, the 3D image is as follows Figure 11 As shown, the contour maps of points 1, 2, and 3 measured on its surface are respectively as follows: Figure 12 , Figure 13 , Figure 14 As shown, the textile crochet needle samples prepared by this method exhibit low wear and low wear depth in physical simulation tests of textile crochet needle friction and wear.

[0066] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0067] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A polishing device for friction and wear samples of textile crochet needles, comprising a support frame (1), a driving component (2), and a turntable (3) driven by the driving component (2), characterized in that: The turntable (3) has several placement slots (31), and the placement slots (31) are provided with clamping components (4) for fixing the textile hook (5). The upper end of the turntable (3) is provided with an extrusion component (6) for extruding the fixative. The upper end of the turntable (3) is provided with a polishing component (7) for polishing the textile hook (5). The lower end of the turntable (3) is provided with a negative pressure component (8) for sucking out the fixative. The turntable (3) is provided with a guide rail (9) for controlling the clamping component (4) to release the clamp. The clamping assembly (4) includes a lower clamping block (41) disposed in a placement groove (31) and an upper clamping block (42) slidably disposed on the lower clamping block (41). A slide rail (411) is provided at the rear end of the lower clamping block (41). A spring (43) is provided between the upper clamping block (42) and the slide rail (411). A fixing groove a (412) for placing a textile hook needle (5) is opened on the lower clamping block (41). A placement block a (413) is provided in the fixing groove a (412). A slot hole a (414) for the textile hook needle (5) to pass through is opened at the front end of the fixing groove a (412). A liquid suction hole (415) is opened at the rear end of the lower clamping block (41). A liquid outlet channel (416) is provided between the liquid suction hole (415) and the fixing groove a (412). A heating element is provided in both the lower clamping block (41) and the upper clamping block (42). The lower end of the upper clamping block (42) is provided with a fixing groove b (421) corresponding to the fixing groove a (412). A placement block b (422) is provided in the fixing groove b (421). The front end of the fixing groove b (421) is provided with a slot hole a (423) for the textile hook needle (5) to pass through. The upper clamping block (42) is provided with a guide rod (424) and an injection pipe (425). An injection channel (426) is provided between the injection pipe (425) and the fixing groove b (421).

2. The polishing device for friction and wear samples of textile crochet needles according to claim 1, characterized in that, The extrusion assembly (6) includes an injection molding machine (61), a drive unit (62) installed inside the injection molding machine, and an auger (63) driven by the drive unit (62). An injection pipe (64) is provided at the lower end of the injection molding machine (61), a feed pipe (65) is provided on the side wall of the injection molding machine (61), and a feed hopper is provided at the upper end of the feed pipe (65).

3. The polishing device for friction and wear samples of textile crochet needles according to claim 2, characterized in that, The fixative in the injection molding machine (61) is polyurethane.

4. The polishing device for friction and wear samples of textile crochet needles according to claim 1, characterized in that, The polishing assembly (7) includes a lower polishing component (71), an upper polishing component (72), and a polishing robot. Both the lower polishing component (71) and the upper polishing component (72) are provided with a number of polishing blocks (73).

5. The polishing device for friction and wear samples of textile crochet needles according to claim 1, characterized in that, The negative pressure assembly (8) includes a negative pressure chamber (81) and a negative pressure pipe (82) that is slidably disposed at the upper end of the negative pressure chamber (81).

6. The polishing device for friction and wear samples of textile crochet needles according to claim 1, characterized in that, The guide rail (9) is provided with a feeding section (91), an injection molding section (92), a grinding section (93), a negative pressure section (94), and a transition section (95) in sequence.

7. The polishing device for friction and wear samples of textile crochet needles according to claim 1, characterized in that, The lower end of the turntable (3) is provided with several suction tubes (32) corresponding to the suction holes (415).

8. A method for preparing a friction and wear specimen for textile crochet needles, using the polishing apparatus for a friction and wear specimen for textile crochet needles as described in claim 1, comprising the following steps: In the material selection process, based on the service conditions of the textile crochet hook (5), T10 steel was selected as the material; In the stamping process, the textile crochet needle (5) is stamped into shape by a stamping machine and then ground by a polishing machine. In the polishing process, the robotic arm places the textile hook (5) into the placement groove (31). The guide rail (9) drives the upper clamping block (42) to press down, making it tightly fit with the lower clamping block (41). The injection molding machine (61) heats the fixative. The drive component (62) drives the auger (63) to rotate and extrude the fixative. The fixative is injected into the injection tube (425) through the injection tube (64) and flows into the fixing groove a (412) through the injection channel (426). In the fixed groove b (421), the textile hook needle (5) is fixed by the solidified fixative. The surface of the textile hook needle (5) is polished by the polishing component (7). The fixative is heated by the lower clamping block (41) and the upper clamping block (42) to melt it. The fixative is sucked out from the suction pipe (32) through the negative pressure pipe (82) and stored in the negative pressure chamber (81). The textile hook needle (5) is taken out by the robot and sent to the next station. The super-hard toughening process involves placing the textile hook needle (5) into a nitriding furnace and performing isothermal nitriding. Two hours before the end of nitriding, a denitrification process is performed, with the denitrification temperature increased to 550°C. The sample is then cooled in the nitriding furnace and then lightly ground and polished. The simulated working conditions were based on the actual working conditions of textile crochet needles. The test used a friction and wear testing machine, the reciprocating MDW-02, to accelerate the testing and damage the crochet needles, thereby simulating fatigue damage after long-term use.

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