A shearing machine hem avoiding mechanism

Abstract

A shearing machine hem avoiding mechanism, including installation base, drive transmission module, cloth support elastic module, installation base includes bottom plate, left side plate, right side plate, front side plate, rear side plate, drive transmission module includes ball screw, nut seat and moving block, ball screw is horizontally erected between left side plate, right side plate, nut seat is sleeved on ball screw, moving block is fixed on nut seat, cloth support elastic module includes several elastic sheets, both sides of each elastic sheet are provided with limiting protrusions, front limiting plate and rear limiting plate are respectively installed on front side plate and rear side plate, limiting protrusions are clamped between front side plate, rear side plate and front limiting plate, rear limiting plate;A supporting plate is further installed on the bottom of the front side plate, a compression spring is installed on the supporting plate, a driving gap is left between the rear side plate and the elastic sheet, a driving protrusion is provided on the elastic sheet at the driving gap, and a recessed clamping groove is provided on the moving block.The present application can be self-adaptively adjusted according to the fabric hemming condition to avoid the round knife from mistakenly shearing the hemming part.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, and in particular to a shearing machine edge-curling avoidance mechanism. Background Technology

[0002] In textile fabric processing, shearing machines are crucial equipment for removing excess fuzz from the fabric surface and improving its appearance and feel. However, some fabrics (such as knitted fabrics and silk) are prone to edge curling during transport, with the thickness of the curled edge being much greater than the thickness of the main fabric body. Existing shearing machines often have fixed planar supports that cannot adjust their shape according to fabric thickness variations. When the curled fabric is pressed against the support and passes through the shearing blades, the blades can easily cut the thicker curled edge, causing edge damage and fraying. This not only reduces shearing quality but also requires subsequent rework, severely impacting production efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a shearing machine edge avoidance mechanism that can adaptively adjust according to the edge curling condition of the fabric and prevent the circular knife from accidentally cutting the curled edge.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a shearing machine edge curling avoidance mechanism, which includes a mounting base, a drive transmission module, and a wool support frame elastic module; The mounting base includes a base plate, a left side plate, a right side plate, a front side plate, and a rear side plate. The left side plate and the right side plate are symmetrically fixed to the top two ends of the base plate, and the front side plate and the rear side plate are fixed to the front and rear ends of the left and right side plates respectively, forming a frame structure with the left side plate and the right side plate. The drive transmission module includes a ball screw, a nut seat, and a moving block for cooperating with the elastic module of the felt frame. The ball screw is horizontally mounted between the left side plate and the right side plate, the nut seat is sleeved on the ball screw, and the moving block is fixed on the nut seat. The elastic module of the fabric support frame includes several spring pieces for supporting the fabric. The spring pieces are arranged sequentially between the front and rear side panels in the left-right direction. Each spring piece has a limiting protrusion on both sides. A front limiting plate and a rear limiting plate are respectively installed on the front and rear side panels. The limiting protrusions are engaged with the front and rear side panels and the front and rear limiting plates. A support plate is also installed at the bottom of the front side panel. A compression spring for cooperating with the spring pieces is installed on the support plate. A driving gap is left between the rear side panel and the spring pieces for cooperating with the moving block. A driving protrusion is provided on the spring piece at the driving gap, and a concave groove is provided on the moving block for cooperating with the driving protrusion.

[0005] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the shearing machine edge curling avoidance mechanism described above, the drive transmission module further includes a servo motor, and the two ends of the ball screw are respectively mounted on the left side plate and the right side plate through bearings and bearing seats. The output shaft of the servo motor is connected to one end of the ball screw for transmission.

[0006] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the shearing machine edge curling avoidance mechanism described above, the servo motor is selected as an AC servo motor with a rated power of 0.37kW.

[0007] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the shearing machine edge curling avoidance mechanism described above, the moving block is an aluminum alloy block, and the moving block is fixed to the top surface of the nut seat by screws.

[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the shearing machine edge-curling avoidance mechanism described above, the depth of the concave groove is 5mm and the width is 6mm. A polytetrafluoroethylene wear-resistant coating is provided on the inner wall of the concave groove, and the thickness of the polytetrafluoroethylene wear-resistant coating is 0.5mm.

[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the shearing machine edge curling avoidance mechanism described above, the spring is made of 65Mn spring steel, and the thickness of the spring is 1mm and the height is 120mm, and the width of the limiting protrusion is 5mm and the height is 3mm.

[0010] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the shearing machine edge rolling avoidance mechanism described above, the base plate is made of Q235 steel plate with a thickness of 20mm, the left side plate and right side plate are rectangular steel plates, and the front side plate and rear side plate are thin steel plates.

[0011] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the shearing machine edge curling avoidance mechanism described above, the mechanism further includes a detection feedback module. The detection feedback module includes a controller and an edge detection sensor for detecting both ends of the fabric to identify the edge curling. The edge detection sensor is installed at the fabric input end of the fabric support frame elastic module and is connected to the input end of the controller.

[0012] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the shearing machine edge-curling avoidance mechanism described above, the controller is a PLC controller and the edge-probing sensor is a laser displacement sensor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the linkage of detection feedback and mechanical structure, can accurately identify the curled edge of the fabric and adaptively form a concave surface to avoid it, completely solving the problem of the circular knife accidentally cutting the curled edge, ensuring the integrity of the fabric, and increasing the qualified rate of shearing from the existing 85% to over 99%. 2. The elastic module of the fabric support frame of this utility model adopts multiple spring sheets and compression springs, which has a simple structure and a fast response. The time from detecting the curled edge to forming the concave surface is ≤0.2s, which can be adapted to high-speed shearing production lines (fabric conveying speed ≤30m / min) and improve process efficiency. 3. The wear-resistant coating on the inner wall of the concave slot and the spring steel material of the spring sheet of this utility model extend the service life of the mechanism, reduce maintenance costs, and are suitable for long-term continuous production use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a diagram showing one usage state of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Reference Figure 1-2 A shearing machine edge curling avoidance mechanism is proposed to solve the problem of fabric damage or reduced shearing quality caused by the collision between the fabric edge curling and the shearing circular blade during the shearing process. The mechanism includes a mounting base, a drive transmission module, and a fabric support frame elastic module. These modules work together to achieve accurate detection and effective avoidance of fabric edge curling. Specifically: The mounting base includes a base plate 11, a left side plate 10, a right side plate 14, a front side plate 3, and a rear side plate 8. The base plate 11 serves as the basic support structure for the entire mechanism. The left side plate 10 and the right side plate 14 are symmetrically fixed to the top ends of the base plate 11. The front side plate 3 and the rear side plate 8 are respectively fixed to the front and rear ends of the left side plate 10 and the right side plate 14, forming a frame structure with the left side plate 10 and the right side plate 14. Preferably, the base plate 11 is made of Q235 steel plate with a thickness of 20mm. The left side plate 10 and the right side plate 14 are rectangular steel plates, which are fixed to the top ends of the base plate 11 with bolts at a spacing of 500mm. The front side plate 3 and the rear side plate 8 are thin steel plates, which are installed at the front and rear ends of the left side plate 10 and the right side plate 14 to form a stable frame structure.

[0017] The drive transmission module is used to realize the movement of the spring piece 5, thereby forming the key part of the rolled edge to avoid the concave surface. The drive transmission module includes a ball screw 12, a nut seat 13, and a moving block 9 for cooperating with the elastic module of the felt frame. The ball screw 12 is horizontally mounted between the left side plate 10 and the right side plate 14. The nut seat 13 is sleeved on the ball screw 12, and the moving block 9 is fixed on the nut seat 13. This allows the nut seat 13 to make precise linear movements along the ball screw 12 through the rotation of the ball screw, thereby realizing the linear reciprocating movement of the moving block 9. Preferably, the moving block 9 is an aluminum alloy block, and the moving block 9 is connected by a screw... The nail is fixed to the top surface of the nut seat 13. The drive transmission module also includes a servo motor. The two ends of the ball screw 12 are respectively mounted on the left side plate 10 and the right side plate 14 through bearings and bearing seats. The output shaft of the servo motor is connected to one end of the ball screw 12. More preferably, the servo motor is an AC servo motor with a rated power of 0.37kW, which is connected to one end of the ball screw 12 (model SFU250-4) through a coupling. The ball screw 12 is mounted between the left side plate 10 and the right side plate 14 through a deep groove ball bearing (model 6204). The nut seat 13 is adapted to the ball screw 12.

[0018] The elastic module of the fabric support frame is the core component that directly supports the fabric and enables the hem to be avoided. The elastic module includes several spring pieces 5 for supporting the fabric. The spring pieces 5 are arranged sequentially between the front side plate 3 and the rear side plate 8 in the left-right direction. Each spring piece 5 has a limiting protrusion on both sides. A front limiting plate 4 and a rear limiting plate 6 are respectively installed on the front side plate 3 and the rear side plate 8. The front limiting plate 4 is installed on the front side plate 3 by screws, and the rear limiting plate 6 is installed on the rear side plate 8 by adjusting plate 7 and screws. The limiting protrusions are engaged between the front side plate 3, the rear side plate 8 and the front limiting plate 4, the rear limiting plate 6, so that the spring pieces 5 are effectively limited in the horizontal direction, and can move up and down in the vertical direction under the action of the moving block 9. Preferably, the spring pieces 5 are made of 65Mn spring steel, and the thickness of the spring pieces 5 is 1mm and the height is 120mm. The width of the limiting protrusions is 5mm and the height is 3mm.

[0019] A support plate 1 is also installed at the bottom of the front side plate 3. A compression spring 2 is installed on the support plate 1 to work in conjunction with the spring 5. The compression spring 2 is a cylindrical compression spring (model Y-shaped) with a wire diameter of 1mm and a free length of 18mm. Three sets of compression springs 2 are evenly arranged at the lower end of the spring 5. The lower end of the compression spring 2 is fixed to the base plate 11. The preset clamping force is adjusted to 50N, so that the upper end of the spring 5 forms a flat support frame plane. The design of the support plate 1 provides a stable installation base for the compression spring 2, ensuring the stability and reliability of the compression spring 2 during operation. A drive gap is provided between the rear side plate 8 and the spring piece 5 for engagement with the moving block 9. A drive protrusion is provided on the spring piece 5 at the drive gap, and a concave groove is provided on the moving block 9 for engagement with the drive protrusion. By moving the moving block 9 at the drive gap, the concave groove can engage with the drive protrusion, causing the drive protrusion to embed downward into the concave groove, thereby pulling the spring piece 5 downward. This results in the spring piece 5 forming a downward-concave surface where the moving block 9 is located, causing the fabric edge to descend with the concave surface and pass through it, avoiding contact with the shearing blade and achieving an avoidance operation. Preferably, upward-sloping inclined portions are provided on both sides of the concave groove to guide the drive protrusion and facilitate better engagement of the drive protrusion into the concave groove. More preferably, the depth of the concave groove is 5mm and the width is 6mm. A polytetrafluoroethylene (PTFE) wear-resistant coating with a thickness of 0.5mm is provided on the inner wall of the concave groove.

[0020] In practical use, the mechanism also includes a detection feedback module, which includes a controller and edge detection sensors for detecting the two ends of the fabric to identify the rolled edges. The edge detection sensors are installed at the fabric input end of the fabric frame elastic module and are connected to the input end of the controller. Preferably, the edge detection sensor is a laser displacement sensor (model KEYENCE IL-600), installed 100mm in front of the fabric frame input end, with a detection accuracy of 0.01mm. The controller is a PLC (model Siemens S7-200), which is connected to the sensor and servo motor through signal lines. It is set to trigger the servo motor to act when the sensor detects the rolled edge. The PLC program required in the PLC is written by those skilled in the art using existing technology and can meet the requirements of this application.

[0021] The specific working process of the edge-curling avoidance mechanism for the shearing machine provided in this application is as follows: 1. Routine operation Under normal operating conditions, the compression spring 2 lifts the spring sheet 5 under the action of a preset clamping force of 50N. The upper ends of the multiple spring sheets 5 form a flat fabric support frame. The fabric is conveyed at a constant speed along the plane of the fabric support frame. The shearing round knife cuts the pile on the surface of the fabric. At this time, the spring sheet 5 is in a horizontal state, providing stable support for the fabric and ensuring the smooth progress of the shearing process. 2. Edge curling inspection When the fabric edge curls to the detection position, the laser displacement sensor detects the abnormality on both sides of the fabric. Since the edge position of the fabric at the curled edge has changed, the reflected light signal received by the laser displacement sensor will also change accordingly. The laser displacement sensor immediately converts this change into an electrical signal and sends a detection signal to the PLC. After receiving the signal, the PLC analyzes and processes the signal to determine whether the fabric has curled and the location and extent of the curl. 3. Avoid curled edges After receiving the edge curling detection signal, the PLC controls the servo motor to start according to the preset program. The servo motor drives the ball screw 12 to rotate, which drives the nut seat 13 and the moving block 9 to move linearly along the axis of the screw 12. The moving block 9 drives the driving protrusion of the spring 5 through the concave groove, causing the spring 5 to move downward and form a concave surface (the depth of the concave surface is about 4mm). The edge of the fabric is pulled down with the concave surface and passes through the concave surface, avoiding contact with the shearing round knife. During this process, the PLC monitors the running status of the servo motor and the position change of the spring 5 in real time to ensure the accuracy and stability of the edge curling and avoidance action. After the fabric edge curling is passed, the PLC controls the servo motor to rotate in the opposite direction, so that the moving block 9 returns to the initial position. The spring 5 returns to the horizontal state under the action of the compression spring 2, and continues to provide stable support for the fabric, waiting for the next edge curling detection and avoidance operation. Through the coordinated operation of the above four modules and the cyclical execution of the three working processes, the shearing machine's edge curling avoidance mechanism can effectively detect and avoid fabric edge curling, ensuring the smooth progress of the shearing process and improving shearing quality and production efficiency.

Claims

1. A shearing machine edge-curling avoidance mechanism, characterized in that: The mechanism includes a mounting base, a drive transmission module, and a flexible support frame module. The mounting base includes a base plate, a left side plate, a right side plate, a front side plate, and a rear side plate. The left side plate and the right side plate are symmetrically fixed to the top two ends of the base plate, and the front side plate and the rear side plate are fixed to the front and rear ends of the left and right side plates respectively, forming a frame structure with the left side plate and the right side plate. The drive transmission module includes a ball screw, a nut seat, and a moving block for cooperating with the elastic module of the felt frame. The ball screw is horizontally mounted between the left side plate and the right side plate, the nut seat is sleeved on the ball screw, and the moving block is fixed on the nut seat. The elastic module of the fabric support frame includes several spring pieces for supporting the fabric. The spring pieces are arranged sequentially between the front and rear side panels in the left-right direction. Each spring piece has a limiting protrusion on both sides. A front limiting plate and a rear limiting plate are respectively installed on the front and rear side panels. The limiting protrusions are engaged with the front and rear side panels and the front and rear limiting plates. A support plate is also installed at the bottom of the front side panel. A compression spring for cooperating with the spring pieces is installed on the support plate. A driving gap is left between the rear side panel and the spring pieces for cooperating with the moving block. A driving protrusion is provided on the spring piece at the driving gap, and a concave groove is provided on the moving block for cooperating with the driving protrusion.

2. The shearing machine edge-curling avoidance mechanism according to claim 1, characterized in that: The drive transmission module also includes a servo motor. The two ends of the ball screw are mounted on the left and right side plates respectively through bearings and bearing seats. The output shaft of the servo motor is connected to one end of the ball screw.

3. The shearing machine edge-curling avoidance mechanism according to claim 2, characterized in that: The servo motor is an AC servo motor with a rated power of 0.37kW.

4. The edge-curling avoidance mechanism of the shearing machine according to claim 1, characterized in that: The moving block is an aluminum alloy block, which is fixed to the top surface of the nut seat by screws.

5. The shearing machine edge-curling avoidance mechanism according to claim 1 or 4, characterized in that: The concave groove has a depth of 5mm and a width of 6mm. A polytetrafluoroethylene (PTFE) wear-resistant coating with a thickness of 0.5mm is provided on the inner wall of the concave groove.

6. The shearing machine edge-curling avoidance mechanism according to claim 1, characterized in that: The spring is made of 65Mn spring steel, with a thickness of 1mm and a height of 120mm. The limiting protrusion has a width of 5mm and a height of 3mm.

7. The shearing machine edge-curling avoidance mechanism according to claim 1, characterized in that: The base plate is made of Q235 steel plate with a thickness of 20mm. The left and right side plates are rectangular steel plates, while the front and rear side plates are thin steel plates.

8. The shearing machine edge-curling avoidance mechanism according to claim 1, characterized in that: The device also includes a detection feedback module, which includes a controller and edge detection sensors for detecting the two ends of the fabric to identify the hem. The edge detection sensors are installed at the fabric input end of the fabric support elastic module and are connected to the input end of the controller.

9. The shearing machine edge-curling avoidance mechanism according to claim 8, characterized in that: The controller is a PLC controller, and the edge detection sensor is a laser displacement sensor.

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