A sewing machine needle puncture performance detection device and detection method

Abstract

The present invention relates to a puncture performance detection device and a detection method for sewing machine needles applied in the field of physical measurement. The needles installed in batches are driven by an actuator plate to puncture sewing materials, and a color display plate for visual observation and image acquisition is arranged on the lower side of the sewing materials. On the one hand, the quality of the same model of needles in batches is detected by using the same fabric. The quality of multiple needles can be judged to a certain extent according to the presentation time sequence of the color display areas on the color display plate. On the other hand, the puncture process of the same model of needles that meet the quality standards on different models of sewing materials can be used to judge the reaction force of different types of sewing materials on the needle. Therefore, when the needle is used to sew the above-mentioned sewing materials, it has a certain reference effect on the setting of parameters such as the sewing speed of the needle.

Description

Technical Field

[0001] The present invention relates to a detection device, in particular to a sewing machine needle puncture performance detection device and a detection method thereof applied in the field of physical measurement. Background Art

[0002] After the sewing machine needles are produced, they need to undergo various quality tests before leaving the factory to determine whether the quality of the finished sewing machine needles is qualified, especially the test of the sewing machine needles' anti-deformation performance.

[0003] The specification of Chinese patent CN202122386218.3 discloses a needle quality detection device, which facilitates the testing of the anti-deformation performance of a small workpiece such as a sewing machine needle by setting a driving part, a support plate, a pressure block, a spring, a telescopic rod, a pressure sensor and a contact block. The device is small in size, reduces the land area, and the pressure value generated during use will not be too large, so that the applied pressure value is more accurate.

[0004] Existing tests on the deformation resistance of machine needles are mostly carried out by placing the needles horizontally and applying pressure to them. However, when in use, the needles penetrate the sewing material vertically. When the quality of the needles is poor, the needles are prone to bending and deformation during the sewing process. However, the existing technology lacks a means to simulate the sewing environment to conduct vertical quality inspections on the needles. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the prior art lacks a means to simulate a sewing environment to perform quality inspection on the machine needle in the vertical direction.

[0006] In order to solve the above problems, the present invention provides a sewing machine needle puncture performance detection device, including a mounting seat, one side of the mounting seat is provided with an induction plate, an upper screen plate, a lower screen plate and a color display plate which are sequentially distributed from top to bottom, a pair of oil cylinders are fixedly connected between the upper end of the induction plate and the inner top end of the mounting seat, a pair of air cylinders are fixedly connected between the lower end of the color display plate and the inner bottom end of the mounting seat, a plurality of uniformly distributed cameras are also fixedly connected to the inner bottom end of the mounting seat, the upper screen plate and the lower screen plate have the same structure and are both thin plate structures with through holes;

[0007] The actuator plate includes a plate body, a plurality of needle grooves evenly distributed like the through holes on the screen plate are formed at the lower end of the plate body, a piston block is slidably connected inside the needle groove, and a compression spring is fixedly connected between the upper end of the piston block and the upper inner wall of the needle groove;

[0008] The color developing board is provided with a plurality of color developing holes which are evenly distributed like the through holes on the screen board. The inner wall of the color developing hole is fixedly connected with a transparent sheet, and the upper end of the transparent sheet is provided with liquid absorbing cotton and liquid capsule.

[0009] As a further supplement to the present application, the transparent sheet is made of hard transparent material, the absorbent cotton is made of absorbent sponge, and the liquid capsule includes a plastic film and a colored liquid filled in the plastic film.

[0010] As a further supplement to the present application, a rubber sleeve is fixedly connected to the inner side wall of the needle groove, and the rubber sleeve is located on the lower side of the piston block.

[0011] As a further supplement to the present application, a plurality of limit rods are fixedly connected to the upper end of the color display board, and the plurality of limit rods are respectively located at the plurality of end feet of the color display board. Limit holes matching the limit rods are provided at the plurality of end corners of the upper screen plate and the lower screen plate, and the color display board is slidably inserted into the limit holes.

[0012] As a further supplement to the present application, the outer end of the limiting rod is threadedly connected with a nut, and the nut is located on the upper end of the mesh plate and fits tightly therewith.

[0013] As a further supplement to the present application, a plurality of inner grooves matching the limiting rods are provided at the lower end of the guiding plate.

[0014] A sewing machine needle puncture performance detection device, the detection method thereof comprises the following steps:

[0015] S1, placing absorbent cotton and liquid capsules in the multiple color development holes one by one;

[0016] S2. Sewing material installation:

[0017] S2-1, place the lower screen plate on the upper side of the color developing plate, and insert the limit rod into the upper limit hole of the lower screen plate;

[0018] S2-2, place the sewing material flat on the upper end of the lower mesh plate, covering all the through holes of the lower mesh plate;

[0019] S2-3, place the upper plate on the upper end of the lower plate, insert the limit rod into the upper limit hole of the upper plate, and finally put a nut on the outer end of the limit rod and tighten it to fix the upper plate so that the sewing material is fixed between the upper plate and the lower plate;

[0020] S3, needle installation: insert multiple needles of the same model to be tested into multiple needle slots one by one from bottom to top, with the needle tips facing downward, and then start the camera to drive the screen holding the sewing material to move upward and close to the needle tips;

[0021] S4, start the oil cylinder at intervals, so that it drives the driving plate to move down at a fixed distance at intervals each time, penetrate the sewing material, and after each downward movement, collect images of the bottom end of the color display plate through the camera;

[0022] S5. Determine the quality of the needle according to the order in which the colors appear at the color-developing holes on the image and the deformation of the needle.

[0023] A sewing machine needle puncture performance detection device, the detection method also includes the following steps:

[0024] W1, perform the same operation as step S1;

[0025] W2. Installation of sewing materials:

[0026] W2-1, a gasket is sleeved on the outside of each limit rod, the lower end of the gasket is placed on the upper end of the color developing plate, and then the same operation as step S2-1 is performed;

[0027] W2-2, select a plurality of different types of sewing materials, and place them flatly on the upper end of the lower mesh plate, and the different sewing materials are respectively covered on the upper sides of different through holes of the lower mesh plate;

[0028] W2-3, perform the same operation as step S2-3;

[0029] W3. Needle installation: Select multiple needles that have been tested and meet the quality standards, insert them into multiple needle slots respectively, with the needle tips facing downward, and then start the camera to drive the screen holding the sewing material to move upward and close to the needle tips;

[0030] W4, perform the same operation as step S4;

[0031] W5. Determine the force exerted by different types of sewing materials on the needle based on the order in which colors appear in the color holes on the image.

[0032] In summary, the present application drives the machine needles installed in batches to puncture the sewing material through the driving plate, and sets a color display plate on the lower side of the sewing material for visual observation and image acquisition. On the one hand, by using the same fabric, the quality inspection of the same model of machine needles in batches can be realized, and the quality of multiple machine needles can be judged to a certain extent according to the presentation time sequence of the color display areas on the color display plate. On the other hand, through the puncture process of the same model of machine needles that meet the quality standards in different types of sewing materials, the reaction force of different types of sewing materials on the machine needle can be judged, so that when the machine is used to sew the above-mentioned sewing materials, it has a certain reference role in the setting of parameters such as the sewing speed of the machine needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The first embodiment of the present application is a three-dimensional Figure 1 ;

[0034] Figure 2 The first embodiment of the present application is a three-dimensional Figure 2 ;

[0035] Figure 3 This is a side structural diagram of the first embodiment of the present application. Figure 1 ;

[0036] Figure 4 for Figure 3 The structural diagram at A in the middle;

[0037] Figure 5 The first embodiment of the present application is a three-dimensional Figure 3 ;

[0038] Figure 6 The first embodiment of the present application is a three-dimensional Figure 4 ;

[0039] Figure 7 The first embodiment of the present application is a three-dimensional Figure 5 ;

[0040] Figure 8 The first embodiment of the present application is a three-dimensional Figure 6 ;

[0041] Fig. 9 This is a schematic diagram of the side structure of the first embodiment of the present application. Figure 2 ;

[0042] Fig.10 This is a schematic diagram of the side structure of the first embodiment of the present application. Figure 3 ;

[0043] Fig.11 This is a perspective view of the second embodiment of the present application;

[0044] Fig.12 This is a side structural diagram of the second embodiment of the present application.

[0045] Description of the numbers in the figure:

[0046] 1 mounting seat, 2 actuator plate, 21 plate body, 2101 needle groove, 2102 inner groove, 22 compression spring, 23 piston block, 24 rubber sleeve, 3 oil cylinder, 4 upper screen plate, 5 lower screen plate, 6 color display plate, 601 color display hole, 7 cylinder, 8 camera, 9 limit rod, 10 transparent sheet, 11 absorbent cotton, 12 liquid capsule, 13 gasket. DETAILED DESCRIPTION

[0047] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0048] The first implementation method:

[0049] The present invention provides a sewing machine needle puncture performance detection device, please refer to Figure 1 and Figure 2, including a mounting base 1, one side of the mounting base 1 is provided with an induction plate 2, an upper screen plate 4, a lower screen plate 5 and a color display plate 6 which are sequentially distributed from top to bottom, a pair of oil cylinders 3 are fixedly connected between the upper end of the induction plate 2 and the inner top end of the mounting base 1, a pair of air cylinders 7 are fixedly connected between the lower end of the color display plate 6 and the inner bottom end of the mounting base 1, and a plurality of uniformly distributed cameras 8 are also fixedly connected to the inner bottom end of the mounting base 1, combined with Figure 5 As shown, the upper plate 4 and the lower plate 5 have the same structure and are both thin plate structures with through holes, the through holes are used for the machine needle to puncture, the sewing material is clamped between the upper plate 4 and the lower plate 5, the machine needle can contact and puncture the sewing material through the through hole on the upper plate 4, and the needle tip of the machine needle can pass through the through hole on the lower plate 5 after penetrating the sewing material;

[0050] See also Figure 3 The actuator plate 2 includes a plate body 21, and a plurality of needle grooves 2101 are formed at the lower end of the plate body 21, which are evenly distributed like the through holes on the upper screen plate 4. A piston block 23 is slidably connected to the inside of the needle groove 2101, and a compression spring 22 is fixedly connected between the upper end of the piston block 23 and the upper inner wall of the needle groove 2101. A rubber sleeve 24 is fixedly connected to the inner wall of the needle groove 2101, and the rubber sleeve 24 is located on the lower side of the piston block 23. When in use, the machine needle is inserted into the needle groove 2101. The elastic wrapping and squeezing of the machine needle by the rubber sleeve 24 can stabilize the position of the machine needle and prevent it from falling down, thus facilitating smooth detection.

[0051] Combination Figure 4 and Figure 6 As shown, the color developing plate 6 is provided with a plurality of color developing holes 601 which are evenly distributed like the through holes on the upper screen plate 4. A transparent sheet 10 is fixedly connected to the inner wall of the color developing hole 601. Liquid absorbent cotton 11 and a liquid capsule 12 are placed on the upper end of the transparent sheet 10. The transparent sheet 10 is made of a hard transparent material, such as transparent plastic. The liquid absorbent cotton 11 is made of a water-absorbing sponge. The liquid capsule 12 includes a plastic film and a colored liquid filled in the plastic film.

[0052] Through the arrangement of the above-mentioned structure, it is possible to realize a visual check of the needle detection results. When the needle tip successfully penetrates the sewing material, it will enter the color developing hole 601 and puncture the liquid capsule 12, causing the colored liquid inside the liquid capsule 12 to flow out and be absorbed by the absorbent cotton 11. Combined with the visual material of the transparent sheet 10, the camera 8 can smoothly obtain the image information of the color developing hole 601 when the color is developing, so that the later personnel can know the order in which each needle punctures the liquid capsule 12 according to the image.

[0053] See also Figure 5, a plurality of limit rods 9 are fixedly connected to the upper end of the color display board 6, and the plurality of limit rods 9 are respectively located at the plurality of end feet of the color display board 6, and a plurality of end corners of the upper screen plate 4 and the lower screen plate 5 are provided with limit holes matching the limit rods 9, and the color display board 6 is slidably inserted into the limit hole, and a nut is threadedly connected to the outer end of the limit rod 9, and the nut is located at the upper end of the screen plate 4 and fits tightly therewith, and through the cooperation of the limit hole and the limit rod 9, the upper screen plate 4 and the lower screen plate 5 can be stably placed on the upper end of the color display board 6, and combined with the use of the nut, the upper screen plate 4 and the lower screen plate 5 can clamp the sewing material.

[0054] Combination Figure 3 and Fig. 9 The lower end of the guide plate 2 is provided with a plurality of inner grooves 2102 matching the limiting rods 9. The inner grooves 2102 provide accommodation space for the limiting rods 9, so that the guide plate 2 can move downward smoothly and drive the machine to puncture the sewing material.

[0055] A sewing machine needle puncture performance detection device, the detection method thereof comprises the following steps:

[0056] S1, such as Figure 6 As shown, the absorbent cotton 11 and the liquid capsule 12 are sequentially placed in the plurality of color development holes 601 one by one;

[0057] S2. Installation of sewing materials:

[0058] S2-1, please refer to Figure 7 , place the lower screen plate 5 on the upper side of the color developing plate 6, and insert the limit rod 9 into the upper limit hole of the lower screen plate 5;

[0059] S2-2, the sewing material ( Figure 7 The upper end of the lower mesh plate 5 is flatly placed to cover all through holes on the lower mesh plate 5;

[0060] S2-3, place the upper plate 4 on the upper end of the lower plate 5, and similarly insert the limit rod 9 into the upper limit hole of the upper plate 4, and finally put a nut on the outer end of the limit rod 9 and tighten it to fix the upper plate 4, so that the sewing material is fixed between the upper plate 4 and the lower plate 5;

[0061] S3, Needle Installation: Please refer to Figure 8 and Fig. 9 , insert multiple needles of the same model to be tested into the multiple needle slots 2101 one by one from bottom to top, with the needle tips facing downward, and then start the camera 8 to drive the screen plate 4 holding the sewing material to move upward and close to the needle tips;

[0062] S4. Please refer to Fig.10 , the oil cylinder 3 is started at intervals, so that it drives the guide plate 2 to move down at a fixed distance each time, penetrates the sewing material, and after each downward movement, the camera 8 collects images of the inner bottom end of the color display plate 6;

[0063] When the machine needle contacts the sewing material and performs extrusion and puncture under the drive of the actuator plate 2, the machine needle will be subjected to the reaction force of the sewing material. At this time, the machine needle squeezes the piston block 23 upward under the reaction force. With each fixed downward movement of the actuator plate 2, the elastic force of the piston block 23 on the machine needle gradually increases, so that the extrusion force of the machine needle on the sewing material increases. A machine needle with good quality can smoothly penetrate the sewing material downward to achieve puncture without deformation. A machine needle with poor quality is prone to bend due to the interaction between the sewing material and the piston block 23. Subsequently, a part of the slightly bent machine needles can continue to penetrate the sewing material to achieve puncture, while another part of the bent machine needles gradually become more deformed and cannot achieve penetration.

[0064] S5. Determine the quality of the needle according to the order in which the colors appear at the color display hole 601 on the image and the deformation of the needle.

[0065] When one or more color holes 601 appear in color on the image, it means that the corresponding needle has successfully penetrated the sewing material and entered the color hole 601, puncturing the liquid capsule 12. The other color holes 601 without color indicate that the corresponding needle has not successfully penetrated the sewing material. It can be judged that in the same image, the quality of the needle on the upper side of the color hole 601 with color is better than the needle on the upper side of the color hole 601 without color. Then, by combining the image information under multiple different extrusion pressures, the quality of multiple needles can be judged to a certain extent.

[0066] Second implementation method:

[0067] This embodiment adds another usage mode based on the embodiment 1, which is as follows: a sewing machine needle puncture performance detection device, and its detection method further includes the following steps:

[0068] W1, perform the same operation as step S1;

[0069] W2. Installation of sewing materials:

[0070] W2-1, such as Fig.12 As shown, a gasket 13 is sleeved on the outside of each limiting rod 9, and the lower end of the gasket 13 is placed on the upper end of the color developing plate 6, and then the same operation as step S2-1 is performed;

[0071] W2-2, select multiple different types of sewing materials, such as Fig.11 The sewing materials Q1, Q2 and Q3 are placed flat on the upper end of the lower mesh plate 5, and different sewing materials are respectively covered on the upper sides of different through holes on the lower mesh plate 5;

[0072] W2-3, perform the same operation as step S2-3;

[0073] W3. Needle installation: Select a plurality of needles that have been tested and meet the quality standards, insert them into the plurality of needle slots 2101 respectively, with the needle tips facing downward, and then start the camera 8 to drive the screen plate 4 holding the sewing material to move upward and close to the needle tips;

[0074] W4, perform the same operation as step S4;

[0075] W5. According to the order in which the colors appear at the color display hole 601 on the image, determine the force exerted by different types of sewing materials on the needle.

[0076] By moving the driving plate 2 downward, multiple needles are synchronously contacted and squeezed with multiple sewing materials respectively. For sewing materials with thicker thickness, higher density or greater friction resistance, it is more difficult for the needle to penetrate them. At this time, the speed at which the needle reaches the absorbent cotton 11 on the color developing plate 6 is slower. On the contrary, for sewing materials with thinner thickness, lower density or smaller friction resistance, the corresponding needle can smoothly penetrate the inside and reach the absorbent cotton 11 faster and pierce it, so that the bottom of the color developing hole 601 displays color. Therefore, according to the order in which colors appear at the color developing hole 601 on the image, the reaction force of different types of sewing materials on the needle can be judged to a certain extent, so that when the machine is used to sew the above-mentioned sewing materials, it has a certain reference effect on the setting of parameters such as the sewing speed of the needle;

[0077] Implementation method 1 is to perform quality inspection on the same model of needles produced in batches using the same fabric, while this implementation method uses the above-mentioned inspection method to detect the puncture performance of the same model of needles that have been quality inspected and meet the quality standards on different types of sewing materials, as well as the friction resistance of the sewing materials.

[0078] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A sewing machine needle puncture performance detection device, characterized in that: The mounting seat (1) comprises a mounting seat (1), wherein one side of the mounting seat (1) is provided with an induction plate (2), an upper screen plate (4), a lower screen plate (5) and a color display plate (6) which are sequentially arranged from top to bottom, a pair of oil cylinders (3) are fixedly connected between the upper end of the induction plate (2) and the inner top end of the mounting seat (1), a pair of air cylinders (7) are fixedly connected between the lower end of the color display plate (6) and the inner bottom end of the mounting seat (1), and a plurality of uniformly distributed cameras (8) are also fixedly connected to the inner bottom end of the mounting seat (1), and the upper screen plate (4) and the lower screen plate (5) have the same structure and are both thin plate structures with through holes; The guide plate (2) comprises a plate body (21), the lower end of the plate body (21) being provided with a plurality of needle grooves (2101) which are evenly distributed like the through holes on the upper screen plate (4), a piston block (23) being slidably connected inside the needle groove (2101), and a compression spring (22) being fixedly connected between the upper end of the piston block (23) and the upper inner wall of the needle groove (2101); The color developing plate (6) is provided with a plurality of color developing holes (601) which are evenly distributed like the through holes on the upper screen plate (4); the inner wall of the color developing hole (601) is fixedly connected with a transparent sheet (10); a liquid absorbing cotton (11) and a liquid capsule (12) are placed on the upper end of the transparent sheet (10); the liquid capsule (12) comprises a plastic film and a colored liquid filled in the plastic film.

2. The puncture performance detection device for sewing machine needles according to claim 1, characterized in that: The transparent sheet (10) is made of a hard transparent material, and the liquid-absorbing cotton (11) is made of a water-absorbing sponge.

3. The puncture performance detection device for sewing machine needles according to claim 1, characterized in that: The inner side wall of the needle groove (2101) is fixedly connected to a rubber sleeve (24), and the rubber sleeve (24) is located on the lower side of the piston block (23).

4. The puncture performance detection device for sewing machine needles according to claim 1, characterized in that: A plurality of limit rods (9) are fixedly connected to the upper end of the color display board (6), and the plurality of limit rods (9) are respectively located at a plurality of end feet of the color display board (6). Limit holes matching the limit rods (9) are provided at a plurality of end corners of the upper screen board (4) and the lower screen board (5), and the color display board (6) is slidably inserted into the limit holes.

5. The sewing machine needle puncture performance detection device according to claim 4, characterized in that: The outer end of the limiting rod (9) is threadedly connected with a nut, and the nut is located on the upper end of the net plate (4) and fits tightly therewith.

6. The sewing machine needle puncture performance detection device according to claim 4, characterized in that: The lower end of the guide plate (2) is provided with a plurality of inner grooves (2102) matching the limiting rods (9).

7. The sewing machine needle puncture performance detection device according to claim 4, characterized in that: The detection method includes the following steps: S1, placing liquid-absorbing cotton (11) and liquid capsule (12) in order in a plurality of color-developing holes (601); S2. Sewing material installation: S2-1, placing the lower screen plate (5) on the upper side of the color developing plate (6), and inserting the limit rod (9) into the upper limit hole of the lower screen plate (5); S2-2, placing the sewing material flat on the upper end of the lower mesh plate (5), covering all through holes on the lower mesh plate (5); S2-3, placing the upper mesh plate (4) on the upper end of the lower mesh plate (5), and similarly inserting the limit rod (9) into the upper limit hole of the upper mesh plate (4), and finally putting a nut on the outer end of the limit rod (9) and tightening it to fix the upper mesh plate (4), so that the sewing material is fixed between the upper mesh plate (4) and the lower mesh plate (5); S3, needle installation: insert multiple needles of the same model to be tested into multiple needle slots (2101) one by one from bottom to top, with the needle tips facing downward, and then start the camera (8) to drive the screen plate (4) holding the sewing material to move upward and close to the needle tips; S4, starting the oil cylinder (3) at intervals, so that it drives the guide plate (2) to move downward at a fixed distance each time, penetrates the sewing material, and after each downward movement, collects an image of the inner bottom end of the color display plate (6) through the camera (8); S5. Judging the quality of the needle according to the order in which the colors appear at the color developing hole (601) on the image and the deformation of the needle.

8. The sewing machine needle puncture performance detection device according to claim 7, characterized in that: The detection method also includes the following steps: W1, perform the same operation as step S1; W2. Installation of sewing materials: W2-1, a gasket (13) is sleeved on the outside of each limit rod (9), the lower end of the gasket (13) is placed on the upper end of the color developing plate (6), and then the same operation as step S2-1 is performed; W2-2, selecting a plurality of different types of sewing materials, placing them flatly on the upper end of the lower mesh plate (5), with the different sewing materials respectively covering the upper sides of different through holes on the lower mesh plate (5); W2-3, perform the same operation as step S2-3; W3. Needle installation: Select a plurality of needles that have been tested and meet the quality standards, insert them into a plurality of needle slots (2101) respectively, with the needle tips facing downward, and then start the camera (8) to drive the screen plate (4) holding the sewing material to move upward and close to the needle tips; W4, perform the same operation as step S4; W5. According to the order in which the colors appear at the color developing holes (601) on the image, determine the magnitude of the force exerted by different types of sewing materials on the needle.

Images