Product wall deviation adjusting method and mold automatic wall deviation adjusting device

Abstract

The invention discloses a product wall deviation adjusting method and an automatic mold wall deviation adjusting device, and the product wall deviation adjusting method comprises the following steps: A, measuring the outer diameter of a product and the wall thickness data of N points through a thickness gauge, and comparing the detected wall thickness data with the actually required wall thickness data through the thickness gauge; b, if the wall thickness of the product deviates, the thickness gauge sends a communication signal to a servo electric cylinder of a deviation adjusting wall on the mold; c, after the servo electric cylinder obtains the signal, the wall thickness of the product is automatically adjusted according to data comparison; d, when it is detected that the wall thickness of a certain point deviates, the servo electric cylinder at the point moves forwards, the forming gap between the opening mold and the core mold at the point is reduced, meanwhile, the servo electric cylinder at the opposite angle of the point moves backwards synchronously, and the forming gap between the opening mold and the core mold at the point is increased synchronously till the wall thickness of a product does not deviate; and E, other points with wall thickness deviation are adjusted. According to the product wall deviation adjusting method, the adjusting efficiency is greatly improved, and the adjusting time consumption is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipe manufacturing, and in particular to a product wall deviation adjustment method and a mold automatic wall deviation adjustment device. Background Art

[0002] Chinese patent document number CN220129468U disclosed on December 5, 2023, a wall thickness deviation adjustment structure for a PO-type mold, including a die and a core rod inserted on the die axis, the two forming a flow channel, an adjustment slot is provided at the outlet of the flow channel, and an adjustment component is provided corresponding to the adjustment slot. The slider provided by the adjustment component can change the gap of the flow channel, thereby adjusting and controlling the wall thickness difference of the product. The adjustment component is evenly distributed around the flow channel, the wall thickness adjustment effect is good and can be finely adjusted, and the product wall thickness is more uniform. The wall thickness deviation adjustment structure can move the entire adjustment component in the axial direction of the adjustment slot by rotating the adjustment device clockwise or counterclockwise using a matching hexagonal wrench to drive the slider to extend out of the adjustment slot, and adjust the wall thickness deviation of the product by changing the gap of the flow channel; this manual adjustment method has low adjustment efficiency, takes a long time to adjust, and has low adjustment accuracy.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The purpose of the present invention is to provide a product wall deviation adjustment method and a mold automatic wall deviation adjustment device with simple structure, high adjustment efficiency, high adjustment accuracy, good product quality and strong practicality, so as to overcome the shortcomings of the existing technology.

[0005] A product wall deviation adjustment method designed for this purpose is characterized by comprising the following steps: A. First, use a thickness gauge to measure the outer diameter of the product and the wall thickness data of N points. The thickness gauge compares the measured wall thickness data with the actual wall thickness data to determine whether there is any deviation in the product wall thickness; B. If the wall thickness of the product deviates, the thickness gauge sends a communication signal to the servo cylinder on the mold to adjust the wall deviation; C. After receiving the signal, the servo cylinder automatically adjusts the wall thickness of the product based on data comparison; D. When a deviation in wall thickness is detected at a certain point, the servo electric cylinder at that point will move forward to reduce the molding gap between the die and the core mold at that point. At the same time, the servo electric cylinder diagonally opposite to it will move backward synchronously to increase the molding gap between the die and the core mold at that point until the wall thickness of the product does not deviate. E. Adjust other points where wall thickness deviation occurs.

[0006] In step D, when the servo cylinder at a certain point and the servo cylinder at the diagonal point move synchronously, the servo cylinders at other points do not move.

[0007] In step D, the product is divided into N areas according to the circumference, each area corresponds to a servo cylinder, and each servo cylinder adjusts the wall thickness of the point on the corresponding area.

[0008] In step A, N is an even number greater than or equal to 4.

[0009] In step A, the communication signal is an RS485 communication signal.

[0010] In step D, the servo cylinders in each area control three positions, namely the position of the point where each servo cylinder is located and the position symmetrical to the left and right with the point of each servo cylinder as the axis.

[0011] In step A, if there is no deviation in the wall thickness of the product, steps B to E are not performed.

[0012] The value of N is 4 / 6 / 8 / 12 / 24.

[0013] A mold automatic wall deviation adjustment device designed for this purpose is used to execute the product wall deviation adjustment method, including a mouth mold, a core mold and a mouth mold mounting seat, the mouth mold is installed on the mouth mold mounting seat, the mouth mold is sleeved on the outer periphery of the core mold, and a molding gap for molding products is provided between the mouth mold and the core mold. It is characterized in that it also includes several groups of adjustment mechanisms, the adjustment mechanism includes two adjustment components arranged diagonally to each other, the adjustment component includes a servo electric cylinder and an adjustment rod, the servo electric cylinder drives the connection adjustment rod, and one end of the adjustment rod is in contact with the outer wall of the mouth mold.

[0014] It also includes a thickness gauge for measuring the outer diameter and wall thickness of the product, and the thickness gauge is communicatively connected to the servo electric cylinder; the servo electric cylinder is provided with an overload protection device.

[0015] The product wall deviation adjustment method of the present invention measures the product outer diameter and wall thickness data of N points through a thickness gauge. If the product wall thickness deviates, the thickness gauge sends a communication signal to the servo electric cylinder on the mold that adjusts the wall deviation. The servo electric cylinder automatically adjusts the product wall thickness deviation by moving forward and backward. This automatic product wall deviation adjustment method greatly improves the adjustment efficiency and greatly reduces the adjustment time. In addition, the servo electric cylinder is used for adjustment, and the adjustment accuracy is high, which greatly improves the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of the adjustment interface of the automatic wall adjustment device in one embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the overall structure of the automatic wall adjustment device in one embodiment of the present invention.

[0018] Figure 3 It is a cross-sectional view of an automatic wall adjustment device in one embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view from another perspective of the automatic wall adjustment device in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] See also Figures 1-4 The method for adjusting the wall deviation of the product includes the following steps: A. First, use a thickness gauge to measure the product's outer diameter and wall thickness at N points. The thickness gauge compares the measured wall thickness data (actual value) with the required wall thickness data (set value) to determine whether the product wall thickness deviates. In this embodiment, the product is a pipe, and the thickness gauge is an ultrasonic thickness gauge.

[0022] B. If the wall thickness of the product deviates (the set value is inconsistent with the actual value, that is, the outer diameter and wall thickness of the product are unqualified), the thickness gauge sends a communication signal to the servo electric cylinder 1 on the mold to adjust the wall deviation; C. After receiving the signal, the servo cylinder 1 starts to automatically adjust the wall thickness of the product according to the data comparison; D. When a certain point position is detected (such as Figure 1 3) when the wall thickness deviates (the wall thickness is too thick), the servo electric cylinder 1 at that point will move forward to reduce the molding gap 4 between the die 2 and the core mold 3 at that point. At the same time, the servo electric cylinder 1 diagonally opposite to it will move backward synchronously to increase the molding gap 4 between the die 2 and the core mold 3 at that point until the wall thickness of the product does not deviate (the control system will control the servo electric cylinder 1 to move a corresponding distance based on the wall thickness deviation value).

[0023] E. Adjust other points where wall thickness deviation occurs, such as Figure 1 If the wall thickness at point 4 or point 2 deviates (the set value is inconsistent with the actual value), the wall thickness is adjusted by the servo electric cylinder 1 corresponding to the point, and the action is the same as step D; until there is no deviation in the wall thickness at all points.

[0024] In step D, when the servo cylinder 1 at a certain point and the servo cylinder 1 diagonally opposite to it move synchronously, the servo cylinders 1 at other points do not move and maintain their current state (neither moving forward nor backward).

[0025] In step D, the product is divided into N areas according to the circumference, each area corresponds to each servo electric cylinder 1, and each servo electric cylinder 1 adjusts the wall thickness of the point on the corresponding area.

[0026] In step A, N is an even number greater than or equal to 4.

[0027] In step D, when wall thickness deviations are detected at more than two points, the points with larger wall thickness deviations are adjusted first, and then the points with smaller wall thickness deviations are adjusted.

[0028] In step A, the communication signal is an RS485 communication signal.

[0029] In step D, the servo cylinders 1 in each area control three positions, namely the position of the point where each servo cylinder 1 is located, and the position symmetrical with the point of each servo cylinder 1 as the axis.

[0030] In step A, if there is no deviation in the wall thickness of the product, steps B to E are not performed, indicating that the outer diameter and wall thickness of the product are qualified.

[0031] The value of N is 4 / 6 / 8 / 12 / 24. In this embodiment, the value of N is 4. Figure 1 Points 1, 2, 3, and 4 correspond to points on the mold, and their phase relationships are one-to-one.

[0032] For the convenience of explanation, Figure 1 Take the four points (areas) in the figure as an example; usually the entire circle of the product (pipe) is divided into the 12 o'clock position of the clock, and point 1 controls three positions, namely the position (time zone) of each point itself and the position symmetrical with each point itself as the axis; if there are 6 / 8 / 12 / 24 adjustment points, the position of the point where the servo cylinder 1 is located and the area controlled by it are similar.

[0033] The automatic mold wall adjustment device is used to implement the product wall adjustment method, including a mouth die 2, a core die 3 and a mouth die mounting seat 7, the mouth die 2 is mounted on the mouth die mounting seat 7, the mouth die 2 is sleeved on the outer periphery of the core die 3, a molding gap 4 for molding products is provided between the mouth die 2 and the core die 3, and also includes a plurality of adjustment mechanisms, the adjustment mechanism includes two adjustment components 5 arranged diagonally to each other, the adjustment component 5 includes a servo electric cylinder 1 and an adjustment rod 6, the servo electric cylinder 1 drives the connection adjustment rod 6, and one end of the adjustment rod 6 contacts the outer wall of the mouth die 2; the two servo electric cylinders arranged diagonally to each other The servo electric cylinder 1 drives the corresponding adjustment rod 6 to move linearly, and one of the adjustment rods 6 moves forward (i.e., moves toward the die 2), and the other adjustment rod 6 moves backward (i.e., moves away from the die 2), thereby driving the die 2 to move, so as to adjust the directional position of the die 2, and then adjust the width of the molding gap 4, so as to achieve mold adjustment wall deviation. For example, if the wall thickness of one side of the pipe is larger and the wall thickness of the other side is smaller, it is necessary to adjust the mold wall deviation so that the wall thickness on both sides of the pipe is basically the same, and then the product can obtain qualified pipe wall thickness when it passes through the outlet die 2 and the core die 3.

[0034] It also includes a thickness gauge and a control system for measuring the outer diameter and wall thickness of the product. The thickness gauge is communicatively connected to the servo electric cylinder 1, and the control system is electrically connected to the thickness gauge and the servo electric cylinder 1 respectively. The control system controls the servo electric cylinder 1 to drive the adjustment rod 6 forward or backward according to the wall thickness deviation of the pipe, so as to adjust the wall deviation of the mold; when used in conjunction with the thickness gauge, it will be more intelligent and automated; when used in conjunction with the thickness gauge, the points that need to be adjusted will be automatically adjusted in real time according to the wall thickness image checked. For example, if the wall thickness of one side of the pipe is larger, a signal will be transmitted to the corresponding servo electric cylinder 1. After receiving the signal, the servo electric cylinder 1 will automatically feed the corresponding distance according to the wall thickness deviation until the required gap is reached. The servo electric cylinder 1 stops moving and enters a self-locking state.

[0035] The servo electric cylinder 1 is provided with an overload protection device, which is electrically connected to the control system. The overload protection device is controlled by a program and adopts a torque mode to prevent the servo electric cylinder 1 from continuing to work in the event of misoperation or failure, thereby causing damage to the equipment or a safety accident.

[0036] An adjusting groove 8 is provided on the die mounting seat 7 , and an adjusting mounting portion 9 is provided on the die 2 . The die 2 is movably adjusted and mounted on the adjusting groove 8 through the adjusting mounting portion 9 .

[0037] A plurality of movable holes 10 are provided in an annular pattern around the die mounting base 7 . The adjusting rod 6 is linearly movable on the movable holes 10 . The movable holes 10 guide the linear movement of the adjusting rod 6 .

[0038] The adjustment mechanism is provided in two, four or eight groups. In this embodiment, the adjustment mechanism is provided in two groups, and the adjustment components 5 are distributed on the outer side wall of the die mounting seat 7 in the front, back, left and right directions, that is, four adjustment components 4 (servo cylinders 1) are provided, and the angle between two adjacent adjustment components 4 is 90 degrees.

[0039] The servo electric cylinder 1 is provided with a telescopic rod 11 , which is connected to the adjustment rod 6 . The servo electric cylinder 1 drives the adjustment rod 6 forward or backward through the telescopic rod 11 .

[0040] The movable holes 10 are distributed in an annular shape on the outer periphery of the adjustment groove 8 , and the movable holes 10 and the adjustment groove 8 are communicated with each other.

[0041] When the adjusting rod 6 moves forward, it acts on the adjusting mounting portion 9 so that the adjusting mounting portion 9 can be movably adjusted on the adjusting groove 8, thereby adjusting the directional position of the die 2.

[0042] It also includes a base 12 and a mounting column 13 . The mounting column 13 is fixed in the inner hole of the base 12 . The die mounting seat 7 is fixed on the base 12 , and the core die 3 is fixed on the mounting column 13 .

[0043] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for adjusting the wall deviation of a product, characterized by: The following steps are involved: A. First, use a thickness gauge to measure the outer diameter of the product and the wall thickness data of N points. The thickness gauge compares the measured wall thickness data with the actual wall thickness data to determine whether there is any deviation in the product wall thickness; B. If the wall thickness of the product deviates, the thickness gauge sends a communication signal to the servo electric cylinder (1) on the mold to adjust the wall deviation; C. After receiving the signal, the servo cylinder (1) starts to automatically adjust the wall thickness of the product according to the data comparison; D. When a deviation in the wall thickness at a certain point is detected, the servo electric cylinder (1) at that point will move forward to reduce the molding gap (4) between the die (2) and the core die (3) at that point. At the same time, the servo electric cylinder (1) at the opposite corner will move backward synchronously to increase the molding gap (4) between the die (2) and the core die (3) at that point until the wall thickness of the product does not deviate; E. Adjust other points where wall thickness deviation occurs.

2. The method for adjusting the product wall deviation according to claim 1, characterized in that: In step D, when the servo electric cylinder (1) at a certain point and the servo electric cylinder (1) at the diagonal point thereof move synchronously, the servo electric cylinders (1) at other points do not move.

3. The method for adjusting the product wall deviation according to claim 1, characterized in that: In step D, the product is divided into N areas according to the circumference, each area corresponds to each servo electric cylinder (1), and each servo electric cylinder (1) adjusts the wall thickness of a point on the corresponding area.

4. The method for adjusting the product wall deviation according to claim 3, characterized in that: In step A, N is an even number greater than or equal to 4.

5. The method for adjusting the product wall deviation according to claim 1, characterized in that: In step A, the communication signal is an RS485 communication signal.

6. The method for adjusting the product wall deviation according to claim 4, characterized in that: In step D, the servo electric cylinder (1) in each area controls three positions, namely the position of the point where each servo electric cylinder (1) itself is located, and the position symmetrical to the left and right with the point of each servo electric cylinder (1) itself as the axis.

7. The method for adjusting product wall deviation according to claim 1, characterized in that: In step A, if there is no deviation in the wall thickness of the product, steps B to E are not performed.

8. The method for adjusting product wall deviation according to claim 4, characterized in that: The value of N is 4 / 6 / 8 / 12 / 24.

9. A device for automatically adjusting the wall deviation of a mold, used for executing the method for adjusting the wall deviation of a product according to any one of claims 1 to 8, comprising a mouth mold (2), a core mold (3) and a mouth mold mounting seat (7), wherein the mouth mold (2) is mounted on the mouth mold mounting seat (7), the mouth mold (2) is sleeved on the outer periphery of the core mold (3), and a molding gap (4) for molding a product is provided between the mouth mold (2) and the core mold (3), characterized in that: The invention also includes several groups of adjustment mechanisms, wherein the adjustment mechanisms include two adjustment components (5) arranged diagonally opposite to each other, and the adjustment components (5) include a servo electric cylinder (1) and an adjustment rod (6). The servo electric cylinder (1) drives the adjustment rod (6), and one end of the adjustment rod (6) contacts the outer wall of the die (2).

10. The automatic mold wall adjustment device according to claim 9, characterized in that: The thickness gauge is also included for measuring the outer diameter and wall thickness of the product. The thickness gauge is communicatively connected to the servo electric cylinder (1); and an overload protection device is provided on the servo electric cylinder (1).

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