Automatic feed device for sawing machine

Abstract

The utility model provides a sawing machine automatic feed device, including throttle valve body, the one side of throttle valve body is provided with the adjustment pivot, still include mutual inductor, analog input module, controller, transmission gear group, control motor and locating seat, mutual inductor is used for inducting the size of the power supply current of saw blade motor, transmission gear group sets up on locating seat and includes two parallel output shafts and input shafts. In the utility model, through setting mutual inductor, it is convenient for inducting the size of current in saw blade motor, setting analog input module, controller, transmission gear group and control motor, it is convenient for control motor to control the adjustment pivot rotation on throttle valve body according to the load condition of saw blade motor, realizes the control to throttle valve flow, thus reaches the function that saw blade feed speed is automatically adjusted according to saw blade load, prolongs the life of saw blade, improves the cutting surface quality, reduces the artificial cost.

Description

Technical Field

[0001] This utility model relates to the field of sawing technology, specifically to an automatic feeding device for a sawing machine. Background Technology

[0002] In traditional sawing machines, the saw blade feed is typically controlled at a constant speed (via a hydraulic throttle valve), and the saw blade is driven by a saw blade motor. However, when sawing different materials or when the sawn surface becomes larger, the load on the saw blade increases accordingly, which can easily lead to accelerated saw blade wear and cause various quality problems on the processed surface, such as saw marks on the steel pipe cross-section, horseshoe-shaped cuts, or wavy patterns on the end face.

[0003] To avoid this problem, traditional sawing machines rely on the operator's personal experience (such as listening to the sawing sound and observing the end face of the steel pipe) to manually adjust the feed speed. In practice, the operator manually adjusts the angle of the feed handwheel to change the feed speed of the saw blade and ensure processing quality. However, this method of controlling the saw blade feed based on manual experience has significant shortcomings: low automation, high labor intensity, and poor consistency in adjustment.

[0004] Therefore, this utility model provides an automatic feed device for a saw to achieve automatic adjustment of the saw blade feed speed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic feeding device for a saw to solve the problems mentioned in the background art. This utility model has the function of adjusting the feed speed according to the cutting load of the saw blade, which can not only effectively protect the saw blade, but also improve the quality of the cut surface.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic feed device for a sawing machine, comprising a throttle valve body, an adjusting shaft on one side of the throttle valve body, a current transformer, an analog input module, a controller, a transmission gear set, a control motor, and a positioning seat. The current transformer is used to sense the magnitude of the power supply current of the saw blade motor. The transmission gear set is mounted on the positioning seat and includes two parallel output shafts and an input shaft. The control motor is fixedly mounted on the positioning seat, and one end of its drive shaft is fixedly connected to one end of its input shaft. The positioning seat is provided with a clamping mechanism for fixing the throttle valve body on the positioning seat. One end of the adjusting shaft and one end of the output shaft are plugged into each other.

[0007] Furthermore, the analog input module is electrically connected to the current transformer and the controller, and the controller is electrically connected to the control motor.

[0008] Furthermore, the control motor is a servo motor.

[0009] Furthermore, the positioning seat includes a base plate and a vertical plate fixedly mounted on the top wall of the base plate. The control motor is fixedly mounted on the base plate and located on one side of the vertical plate. A limiting sleeve fitted outside the input shaft is fixed on the surface of the vertical plate. The limiting sleeve is rotatably connected to the input shaft. The throttle valve body is located on the other side of the vertical plate.

[0010] Furthermore, the transmission gear set includes a connecting plate, a driving gear, and a driven gear. The connecting plate has holes one and two at its two ends, which are respectively fitted onto the output shaft and the limiting sleeve. Holes one and two are rotatably engaged with the output shaft and the limiting sleeve, respectively. The driving gear and the driven gear are located on one side of the connecting plate and are respectively fixedly fitted onto the input shaft and the output shaft. The driving gear and the driven gear mesh.

[0011] Furthermore, an arc-shaped limiting block is fixedly connected to one side of the connecting plate, and a notch groove adapted to the arc-shaped limiting block is provided on the top wall of the upright plate.

[0012] Furthermore, the clamping mechanism includes a base plate, a gantry frame, a pressure plate, and a lead screw. The lower end face of the base plate is fixedly connected to the upper end face of the base plate. The bottom of the gantry frame is rotatably connected to both sides of the base plate. The lead screw is screwed through the top of the gantry frame. A pressure plate is provided inside the gantry frame, with its top wall rotatably connected to the bottom of the lead screw.

[0013] Furthermore, the top wall of the seat plate is provided with a limiting groove, the two ends of the pressure plate are provided with limiting grooves, the two uprights on the gantry frame pass through adjacent limiting grooves, and the bottom of the pressure plate is fixedly connected with a positioning sleeve that can be gapped and sleeved outside the top of the throttle valve body.

[0014] Furthermore, one end of the output shaft is provided with a socket for insertion and connection with the adjusting shaft, and a key block is provided between the adjusting shaft and the inner peripheral wall of the socket.

[0015] The beneficial effects of this utility model are as follows: 1. In this invention, a current transformer is used to detect the current in the saw blade motor in real time, thereby indirectly reflecting the load state of the saw blade. This current signal is converted by an analog input module and sent to the controller. The controller outputs a control signal according to a preset strategy to drive the control motor. The control motor drives the adjusting shaft of the throttle valve body to rotate through a transmission gear set, thereby precisely adjusting the opening size of the throttle valve, changing the hydraulic oil flow, and ultimately achieving the goal of automatically adjusting the saw blade feed speed according to load changes. This automatic control method effectively avoids saw blade overload wear, extends its service life, improves the quality of the cutting surface, reduces reliance on operators, and lowers labor costs.

[0016] 2. In this utility model, by setting a positioning seat and a clamping mechanism, the throttle valve body is clamped on the positioning seat; the adjusting shaft on the throttle valve body and one end of the output shaft on the transmission gear set are connected by insertion. This structure allows the throttle valve body and the positioning seat to be quickly assembled and separated by the clamping mechanism alone, which significantly improves the efficiency of disassembly and assembly and makes maintenance convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automatic feeding device for a sawing machine according to the present invention; Figure 2 for Figure 1 A diagram of the back; Figure 3 for Figure 1 A diagram at the bottom; Figure 4 for Figure 1 A diagram showing the unfolding after the explosion; Figure 5 for Figure 4 A diagram of the back.

[0018] In the diagram: 1. Throttling valve body; 11. Adjusting shaft; 2. Analog input module; 3. Controller; 4. Transmission gear set; 41. Output shaft; 411. Socket; 42. Input shaft; 43. Connecting plate; 44. Driving gear; 45. Driven gear; 431. Hole 1; 432. Hole 2; 433. Arc-shaped limit block; 5. Control motor; 6. Positioning seat; 61. Base plate; 62. Vertical plate; 621. Limiting sleeve; 622. Notch groove; 7. Clamping mechanism; 71. Seat plate; 711. Limiting groove; 72. Portal frame; 73. Pressure plate; 731. Limiting groove; 733. Positioning sleeve; 74. Lead screw; 8. Current transformer. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1 to 5 This utility model provides a technical solution: an automatic feed device for a sawing machine, including a throttle valve body 1, which is connected to an oil circuit for controlling the feed of the sawing machine. An adjusting shaft 11 is provided on one side of the throttle valve body 1. When the adjusting shaft 11 rotates, it can adjust the flow rate of the oil circuit. The driving force for the saw blade is provided by the saw blade motor on the sawing machine. When the load on the saw blade is too large, the current flow in the power supply line to the saw blade motor will increase, that is, the load on the saw blade motor will increase. Since the saw blade is fed at a constant speed, the saw blade is easily worn faster due to excessive load, and the cutting quality will be affected.

[0021] This technical solution also includes a current transformer 8, an analog input module 2, a controller 3, a transmission gear set 4, a control motor 5, and a positioning base 6. The current transformer 8 is used to sense the magnitude of the power supply current of the saw blade motor. In specific implementation, the primary side of the current transformer 8 is connected in series with the power supply line of the saw blade motor, and the secondary side of the current transformer 8 outputs the induced current. The analog input module 2 is electrically connected to the current transformer 8 and the controller 3. The analog input module 2 converts the current signal sensed by the current transformer 8 into a signal that the controller 3 (PLC) can recognize. The controller 3 is electrically connected to the control motor 5. The controller 3 adjusts the rotation angle of the control motor 5 according to the settings. The transmission gear set 4 is set on the positioning base 6 and includes two parallel output shafts 41 and an input shaft 42. The control motor 5 is fixedly set on the positioning base 6, and one end of its drive shaft and one end of the input shaft 42 are fixedly connected. Thus, the rotation angle of the adjustment shaft 11 can be adjusted through the transmission gear set 4. The control motor 5 is a servo motor.

[0022] The positioning seat 6 is equipped with a clamping mechanism 7 for fixing the throttle valve body 1 to the positioning seat 6. The clamping mechanism 7 has the function of quickly clamping and releasing the throttle valve body 1. The throttle valve body 1 has a square block structure. One end of the adjusting shaft 11 and one end of the output shaft 41 are connected by insertion. Specifically, one end of the output shaft 41 has a socket 411 for insertion into the adjusting shaft 11. A key block is provided between the adjusting shaft 11 and the inner peripheral wall of the socket 411. A keyway that matches the key block is provided between the outer peripheral wall of the adjusting shaft 11 and the inner peripheral wall of the socket 411. After the adjusting shaft 11 and the output shaft 41 are inserted, they are limited by the key. When the output shaft 41 rotates, it can drive the adjusting shaft 11 to rotate. The clamping mechanism 7 makes it easier to disassemble the throttle valve body 1 separately and facilitates the cleaning (internal and external) maintenance of the throttle valve body 1.

[0023] In this embodiment, the positioning seat 6 includes a base plate 61 and a vertical plate 62 fixedly mounted on the top wall of the base plate 61. The control motor 5 is fixedly mounted on the base plate 61 and located on one side of the vertical plate 62. A limiting sleeve 621 is fixedly mounted on the surface of the vertical plate 62 and sleeved on the outside of the input shaft 42. The limiting sleeve 621 and the input shaft 42 are rotatably connected. In specific implementation, a bearing can be installed between the limiting sleeve 621 and the input shaft 42. The throttle valve body 1 is located on the other side of the vertical plate 62.

[0024] Furthermore, the transmission gear set 4 includes a connecting plate 43, a driving gear 44, and a driven gear 45. The connecting plate 43 has holes 431 and 432 at both ends, respectively fitted onto the output shaft 41 and the limiting sleeve 621. Holes 431 and 432 are rotatably fitted onto the output shaft 41 and the limiting sleeve 621. Specifically, bearings adapted to the output shaft 41 and the limiting sleeve 621 are fixedly fitted into both holes 431 and 432. The driving gear 44 and driven gear 45 are fixedly fitted onto the input shaft 42 and the output shaft 41, respectively, and mesh with each other. In use, a gear guard can be fixedly installed on one side of the connecting plate 43, with the driving gear 44 and driven gear 45 located inside the gear guard to prevent sawing debris from entering the meshing area of ​​the driving gear 44 and driven gear 45. The rotating structure of the connecting plate 43, in conjunction with the clamping mechanism 7, allows the throttle valve body 1 to be moved out of its installation position and separated from the output shaft 41. An arc-shaped limiting block 433 is fixedly connected to one side of the connecting plate 43. The top wall of the vertical plate 62 has a notch groove 622 that matches the arc-shaped limiting block 433. The arc-shaped limiting block 433 and the notch groove 622 are slidably connected by a clearance fit. The notch groove 622 and the arc-shaped limiting block 433 can effectively prevent the connecting plate 43 from bending and deforming.

[0025] In this embodiment, the clamping mechanism 7 includes a base plate 71, a gantry frame 72, a pressure plate 73, and a lead screw 74. The lower end face of the base plate 71 is fixedly connected to the upper end face of the base plate 61. The bottom of the gantry frame 72 is rotatably connected to both sides of the base plate 71. Specifically, positioning shafts are welded to both sides of the base plate 71. Connecting holes that are sleeved on the outside of the positioning shafts are opened on the two uprights on the gantry frame 72 near the bottom. The connecting holes and the positioning shafts are clearance-fitted. The lead screw 74 is screwed through the top of the gantry frame 72. A pressure plate 73 is provided inside the gantry frame 72 and rotatably connected to the bottom of the lead screw 74. When the gantry frame 72 is in an upright state, the rotation of the lead screw 74 can drive the pressure plate 73 to move downward, thereby pressing the throttle valve body 1 between the base plate 71 and the pressure plate 73. The top end of the lead screw 74 can be welded with an external hexagonal head.

[0026] Furthermore, a limiting groove 711 is provided on the top wall of the seat plate 71. The width of the limiting groove 711 is the same as the thickness of the throttle valve body 1, and its length is greater than the width of the throttle valve body 1. Thus, the limiting groove 711 can limit the throttle valve body 1 in front and behind, and the throttle valve body 1 can move left and right. Limiting grooves 731 are provided at both ends of the pressure plate 73. The two uprights on the gantry frame 72 pass through the adjacent limiting grooves 731. After the limiting grooves 731 are blocked by the uprights, the pressure plate 73 can only move relative to the length of the uprights. A positioning sleeve 733 that can be gapped and sleeved on the top of the throttle valve body 1 is fixedly connected to the bottom of the pressure plate 73. The positioning sleeve 733, the pressure plate 73, and the limiting groove 711 can limit and fix the throttle valve body 1 on the base plate 61.

[0027] Working Principle: Before use, the controller 3, analog input module 2, and current transformer 8 can be fixedly installed on the base plate 61 or other convenient locations. During use, when the saw blade feeds during the sawing process, as the cutting load increases, the saw blade motor current increases accordingly. The current transformer 8 detects the current change in real time and converts it into a signal that the controller 3 can process via the analog input module 2. The controller 3 has a preset current threshold or control algorithm corresponding to the sawing load. When the signal value converted by the analog input module 2 exceeds the set threshold (indicating excessive load), the controller 3 outputs a control signal to drive the control motor 5 to rotate at a specific angle. The control motor 5 drives the drive gear 44 through the input shaft 42, which in turn drives the output shaft 41 to rotate via the driven gear 45. This, in turn, drives the adjusting shaft 11 to rotate, reducing the opening of the throttle valve and decreasing the hydraulic oil flow, thereby automatically reducing the saw blade feed speed. When the load decreases and the detected current signal returns to the normal range, the controller 3 controls the control motor 5 to reverse, restoring the throttle valve body 1 to the set opening, and the feed speed returns to normal.

[0028] When the throttle valve body 1 needs to be disassembled for maintenance, first use a tool to loosen the external hexagonal screw on the lead screw 74, causing the pressure plate 73 to move upwards and disengage from the top of the throttle valve body 1; then swing the gantry frame 72 outwards to open it, and then lift the throttle valve body 1 upwards, causing the adjusting shaft 11 to disengage from the insertion hole 411 of the output shaft 41, thus completing the disassembly. After maintenance, reset the components in reverse order and re-clamp them for continued use.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic feed device for a sawing machine, comprising a throttle valve body (1), wherein an adjusting shaft (11) is provided on one side of the throttle valve body (1), characterized in that, It also includes a current transformer (8), an analog input module (2), a controller (3), a transmission gear set (4), a control motor (5), and a positioning seat (6). The current transformer (8) is used to sense the magnitude of the power supply current of the saw blade motor. The transmission gear set (4) is set on the positioning seat (6) and includes two parallel output shafts (41) and an input shaft (42). The control motor (5) is fixedly set on the positioning seat (6) and its drive shaft and one end of the input shaft (42) are fixedly connected. The positioning seat (6) is provided with a clamping mechanism (7) for fixing the throttle valve body (1) on the positioning seat (6). One end of the adjusting shaft (11) and one end of the output shaft (41) are plugged into each other.

2. The automatic feed device for a sawing machine according to claim 1, characterized in that: The analog input module (2) is electrically connected to the current transformer (8) and the controller (3), and the controller (3) is electrically connected to the control motor (5).

3. The automatic feed device for a sawing machine according to claim 2, characterized in that: The control motor (5) is a servo motor.

4. The automatic feed device for a sawing machine according to claim 1, characterized in that: The positioning seat (6) includes a base plate (61) and a vertical plate (62) fixedly mounted on the top wall of the base plate (61). The control motor (5) is fixedly mounted on the base plate (61) and located on one side of the vertical plate (62). A limiting sleeve (621) is fixedly mounted on the surface of the vertical plate (62) and sleeved outside the input shaft (42). The limiting sleeve (621) and the input shaft (42) are rotatably connected. The throttle valve body (1) is located on the other side of the vertical plate (62).

5. The automatic feed device for a sawing machine according to claim 4, characterized in that: The transmission gear set (4) includes a connecting plate (43), a driving gear (44), and a driven gear (45). The two ends of the connecting plate (43) are provided with a hole 1 (431) and a hole 2 (432) respectively sleeved on the outside of the output shaft (41) and the limiting sleeve (621). The hole 1 (431) and the hole 2 (432) are rotatably engaged with the output shaft (41) and the limiting sleeve (621) respectively. The driving gear (44) and the driven gear (45) are located on one side of the connecting plate (43) and are fixedly sleeved on the input shaft (42) and the output shaft (41) respectively. The driving gear (44) and the driven gear (45) mesh.

6. The automatic feed device for a sawing machine according to claim 5, characterized in that: The connecting plate (43) is fixedly connected to one side of an arc-shaped limiting block (433) near one end, and the top wall of the upright plate (62) is provided with a notch groove (622) that matches the arc-shaped limiting block (433).

7. An automatic feed device for a sawing machine according to claim 5, characterized in that: The clamping mechanism (7) includes a base plate (71), a gantry frame (72), a pressure plate (73), and a lead screw (74). The lower end face of the base plate (71) is fixedly connected to the upper end face of the base plate (61). The bottom of the gantry frame (72) is rotatably connected to both sides of the base plate (71). The lead screw (74) is screwed through the top of the gantry frame (72). The pressure plate (73) is provided inside the gantry frame (72) and is rotatably connected to the bottom of the lead screw (74).

8. An automatic feed device for a sawing machine according to claim 7, characterized in that: The top wall of the seat plate (71) is provided with a limiting groove (711), and the two ends of the pressure plate (73) are provided with limiting grooves (731). The two uprights on the gantry frame (72) pass through the adjacent limiting grooves (731). The bottom of the pressure plate (73) is fixedly connected with a positioning sleeve (733) that can be gapped and sleeved outside the top of the throttle valve body (1).

9. An automatic feed device for a sawing machine according to claim 1, characterized in that: One end of the output shaft (41) is provided with a socket (411) for connecting to the adjusting shaft (11), and a key block is provided between the adjusting shaft (11) and the inner peripheral wall of the socket (411).

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