CN-117428836-B - PVC tubular product fixed length cutting equipment with overheat early warning function

CN117428836BCN 117428836 BCN117428836 BCN 117428836BCN-117428836-B

Abstract

The invention discloses a PVC pipe fixed-length cutting device with an overheat early warning function, which relates to the technical field of pipe cutting, and is characterized in that a structure form of a hot cutter is utilized to quantitatively cut a PVC pipe, the hot cutter is electrified and heated to generate hot cutting temperature which is enough to melt the PVC pipe, and hot cutting is carried out along the direction from top to bottom, in the process, according to the physical characteristics of the PVC pipe, the hot cutting pressure in the hot cutting process is calculated and obtained, and the display value is combined to a tension sensor, the nature is that the tension sensor is used for directly feeding back the resistance born in the hot cutting action, so that the direct influence of the hot cutting temperature on the PVC pipe in the melting-cutting process is reflected again, and the resistance is smaller in the overtemperature state; under the state of lack of temperature, the greater the "resistance" is to combine to specific state, play the effect of supervision whole running state.

Inventors

PAN QIANQIAN
CHEN HAO
LI XUEWEN
DING ZHENGFU

Assignees

杭州上卓实业有限公司

Dates

Publication Date: 20260508
Application Date: 20231205

Claims (6)

1. The PVC pipe fixed-length cutting equipment with the overheat pre-warning function comprises a workbench (1), and is characterized in that a PVC pipe is placed on the workbench (1), a working assembly and a controller (2) are arranged on the workbench (1), the working assembly comprises a movable support (5), a tension sensor (16), a hot cutter (13), an electric lifting cylinder (4) and a power box (6), a motion control system corresponding to the working assembly is arranged in the controller (2), and the motion control system comprises a data collection unit, a data analysis unit and an integrated interaction unit; The data collection unit is used for collecting the output current of the power box (6) on the hot cutter (13), the motion parameters of the electric lifting cylinder (4) and the detection data on the tension sensor (16), and sending the output current, the motion parameters and the detection data to the data analysis unit; The data analysis unit establishes a temperature rise formula on the hot cutter (13) by using output current, obtains hot cutting temperature of the hot cutter (13) by using the temperature rise formula, generates an action basic state by using the hot cutting temperature and the motion parameters, and substitutes detection data into the action basic state to generate reference information; The integrated interaction unit controls the magnitude and the motion parameters of the output current according to the action basic state and the reference information, the tension sensor (16) is arranged at the two sides of the upper end of the movable bracket (5), an upper connecting plate (15) is arranged at the top end of a transmission rod of the tension sensor (16), and a conductive block (14) corresponding to the hot cutter (13) is arranged on the upper connecting plate (15); In a temperature rise formula, calculating to obtain the hot cutting temperature of the hot cutting knife (13) according to the physical characteristics of the hot cutting knife (13) and the multiplication value of the output current, presetting the melting temperature threshold value of the PVC pipe in a data analysis unit, sending the melting temperature threshold value to an action basic state, and setting the operation form of the hot cutting knife (13) into a preheating stage and a hot cutting stage according to the motion parameters: In the preheating stage, a hot cutting knife (13) is positioned right above the PVC pipe, the hot cutting temperature is larger than the melting temperature threshold, the difference value between the hot cutting temperature and the melting temperature threshold is set as a compensation temperature, the compensation temperature is lower than 10 ℃, and the compensation temperature in the preheating stage is a relatively fixed value; In the hot cutting stage, the hot cutting knife (13) is contacted with the PVC pipe, and hot cutting action is carried out along the direction from top to bottom, the hot cutting temperature in the hot cutting stage is smaller than that in the preheating stage and is larger than the melting temperature threshold value, the compensation temperature in the hot cutting stage is smaller than that in the preheating stage, and the compensation temperature in the hot cutting stage is of a relatively variable value.
2. The PVC pipe fixed-length cutting equipment with the overheat pre-warning function according to claim 1, wherein a cutting groove is formed in the position, corresponding to the hot cutting knife (13), of the workbench (1), the hot cutting knife (13) is located at the upper position of the cutting groove, the electric lifting cylinder (4) is located at the position right below the cutting groove, an output shaft of the electric lifting cylinder (4) is fixedly connected with the lower end center point of the movable support (5), and the movable support (5) is in sliding connection on the workbench (1) along the vertical direction through the electric lifting cylinder (4).
3. The PVC pipe fixed-length cutting equipment with the overheat pre-warning function according to claim 2, wherein a first motor (8) is arranged at the two ends of the workbench (1) corresponding to the cutting groove, an upper arc pressing plate (7) is arranged on an output shaft of the first motor (8), and the upper arc pressing plate (7) is rotationally connected on the workbench (1) along the output shaft of the first motor (8).
4. The PVC pipe fixed length cutting equipment with the overheat pre-warning function according to claim 3, wherein a fixed support (3) is arranged at a position right above a corresponding grooving of the workbench (1), a second motor (9) is arranged at one end of the upper surface of the fixed support (3), a screw rod (10) is arranged at the output end of the second motor (9), the setting direction of the screw rod (10) is perpendicular to the length direction of the workbench (1), and the screw rod (10) is parallel to the hot cutter (13).
5. The PVC pipe fixed-length cutting equipment with the overheat pre-warning function according to claim 4, wherein the screw rod (10) is connected with a threaded sliding sleeve (11) in a threaded mode, a steel wire sliding plate (12) is arranged at the lower end of the threaded sliding sleeve (11), and the arrangement position of the steel wire sliding plate (12) is matched with that of a hot cutter (13).
6. The fixed-length PVC pipe cutting equipment with the overheat pre-warning function according to claim 5, wherein the motion parameter of the electric lifting cylinder (4) is the downward moving speed of the hot knife (13), an ideal value on the tension sensor (16) is preset in the data analysis unit, the ideal value is used for indicating that the PVC pipe is in an unobstructed state for the hot knife (13) in the hot cutting action, a hot cutting pressure calculation formula is established according to the physical characteristics of the PVC pipe and the hot cutting temperature of the hot knife (13), the hot cutting pressure is calculated, the balance coefficient is calculated according to the hot cutting pressure and the detection data, and the following states are set according to the ideal data, the detection data and the balance coefficient: s1, in the hot cutting action, when the detection data is larger than an ideal value and the balance coefficient is equal to 1.05, marking the hot cutting temperature as an optimal state, and keeping the value of the output current and the motion parameters unchanged; S2, in the hot cutting action, the detection data is larger than an ideal value 1.98, the hot cutting temperature is marked as a temperature lack state, the output current of the power box (6) is increased through the controller (2), the downward moving speed of the hot cutting knife (13) is reduced, or the hot cutting knife (13) is in a temporary interruption downward moving state; and S3, in the hot cutting action, the detection data are larger than the ideal value and smaller than the ideal value by 1.12, the hot cutting temperature is marked as an overtemperature state, the output current of the power box (6) is reduced through the controller (2), and the downward moving speed of the hot cutting knife (13) is accelerated.

Description

PVC tubular product fixed length cutting equipment with overheat early warning function Technical Field The invention relates to the technical field of pipe cutting, in particular to a PVC pipe fixed-length cutting device with an overheat pre-warning function. Background For PVC pipe processing, it is necessary to cut the pipe into a fixed length according to the production requirement, because the sawing (saw tooth disc) mode of the traditional cutting mode can cause broken lines at the cut of the pipe and the cutting process or consume a part of the pipe, the current cutting mode is mainly based on hot cutting, and the process is that the heated hot wire or hot knife is heated to a certain temperature, the heated hot wire or hot knife completes the cutting process, the cut after cutting is smooth, and the cutting loss is lower. However, in the actual process, if the temperature of the hot wire or the hot knife is too high, abnormal deformation can occur when the incision position of the pipe is too softened, and if the temperature of the hot wire or the hot knife is low, the cutting process is difficult to stabilize, and the incision position of the PVC pipe is also insufficiently softened when the hot wire or the hot knife moves, so that abnormal states such as broken lines, wiredrawing, gaps and the like exist at the incision surface position after the cutting is completed. In addition, the cutting quality of the pipe is related to the moving mode (speed) of the hot wire or the hot knife, and under the condition of meeting the requirement, if the moving speed is too slow, the problems that the contact time of the hot wire or the hot knife and the cut position of the pipe is longer, abnormal deformation occurs due to over softening can be caused, and under the condition of high temperature, the deformation degree is larger, otherwise, if the moving process has the speed difference, the cut position has the problems of broken lines, gaps and the like. To this end, the application proposes a solution. Disclosure of Invention The invention aims to provide a PVC pipe fixed-length cutting device with an overheat early warning function, which is used for solving the problem that the quality of an integral notch surface is directly affected due to the difference of temperature and a moving mode in the process of finishing fixed-length cutting of a PVC pipe by utilizing a thermal cutting mode. The invention aims at realizing the technical scheme that the PVC pipe fixed-length cutting equipment with the overheat pre-warning function comprises a workbench, wherein the workbench is provided with a PVC pipe, the workbench is provided with a working assembly and a controller, the working assembly comprises a movable support, a tension sensor, a hot cutter, an electric lifting cylinder and a power box, and the controller is provided with a motion control system corresponding to the working assembly, and the motion control system comprises a data collection unit, a data analysis unit and an integrated interaction unit; The data collection unit is used for collecting output current of the power supply box to the hot cutter, motion parameters of the electric lifting cylinder and detection data on the tension sensor, and sending the output current, the motion parameters and the detection data to the data analysis unit; The data analysis unit establishes a temperature rise formula on the hot cutter by using output current, obtains hot cutting temperature of the hot cutter by using the temperature rise formula, generates an action basic state by using the hot cutting temperature and the motion parameters, and substitutes detection data into the action basic state to generate reference information; the integrated interaction unit controls the magnitude of the output current and the motion parameters according to the action basic state and the reference information. The automatic hot cutting machine is further characterized in that a cutting groove is formed in the position, corresponding to the hot cutting knife, of the workbench, the hot cutting knife is located at the upper position of the cutting groove, the electric lifting cylinder is located at the position right below the cutting groove, an output shaft of the electric lifting cylinder is fixedly connected with the center point of the lower end of the movable support, and the movable support is in sliding connection on the workbench along the vertical direction through the electric lifting cylinder. The hot knife is characterized in that the tension sensor is arranged at two sides of the upper end of the movable support, an upper connecting plate is arranged at the top end of a transmission rod of the tension sensor, and a conductive block corresponding to the hot knife is arranged on the upper connecting plate. The automatic arc pressing device is further characterized in that first motors are arranged at the positions of the two ends of the workbench corresponding t