Extruder centering detection method

Abstract

The method for detecting the centering performance of the extruding machine comprises the following steps: S1, cleaning a cavity in an extruding cylinder; s2, a measuring device is fixed to a first standard rod, the extrusion cylinder moves relative to the front beam in the first direction, the measuring device extends into a cavity of the extrusion cylinder, and in the moving process of the extrusion cylinder, the measuring device is driven to rotate; the measuring device can measure the change value of the distance between the inner wall surface of at least one position in the circumferential direction of the extrusion cylinder and the first standard bar in the radial direction of the first standard bar; and S3, according to the change value of the distance between the inner wall face of at least one position in the circumferential direction of the extrusion container and the first standard bar in the radial direction of the first standard bar, whether the central axis of the cavity of the extrusion container deviates relative to the central axis of the front beam outlet or not is judged. According to the centering detection method for the extruding machine, whether the central axis of the cavity of the extruding cylinder and the central axis of the extruding shaft deviate or not can be conveniently judged, and therefore the extruding machine can be conveniently adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of extruder centering, and in particular to an extruder centering detection method. Background Art

[0002] In the related art, the centring adjustment of long-stroke extruders has always been to adjust the moving beam based on the extrusion barrel. The centring of horizontal double-acting extruders is to measure the gap between the extrusion shaft and the extrusion barrel with a feeler gauge, and only the matching gap between the non-extrusion side barrel and the shaft can be measured. The extrusion side and the front beam are so close that data statistics cannot be performed. Accurate data cannot be obtained for the center of the extrusion barrel and the center of the front beam. However, the gap value between the extrusion barrel and the extrusion shaft cannot be accurately determined, and only an approximate range can be determined by a feeler gauge. In addition, the long-stroke extrusion barrel is distorted during the adjustment process, which causes errors in the extrusion side data and the non-extrusion measurement data. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a method for detecting the centering of an extruder.

[0004] The extruder centering detection method of the embodiment of the present invention comprises a front beam, an extrusion cylinder and a movable beam, the central axis of the front beam outlet of the front beam extends in a first direction, the extrusion cylinder can move relative to the front beam in the first direction, and the extrusion shaft on the movable beam can move relative to the extrusion cylinder in the first direction. The extruder centering detection method comprises the following steps:

[0005] S1, cleaning the cavity in the extrusion cylinder;

[0006] S2, installing a part of the first standard rod on the front beam and making the central axis of the first standard rod coincide with the central axis of the outlet of the front beam, fixing a measuring device on the first standard rod, moving the extrusion cylinder relative to the front beam in the first direction and making the measuring device extend into the cavity of the extrusion cylinder, and during the movement of the extrusion cylinder, the measuring device can measure the change value of the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod;

[0007] S3. Determine whether the central axis of the cavity of the extrusion cylinder is offset relative to the central axis of the front beam outlet based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod.

[0008] In some embodiments, the extruder alignment detection method further comprises the steps of:

[0009] S4, installing a part of the second standard rod into the rod cavity of the extrusion shaft and making the central axis of the second standard rod coincide with the central axis of the extrusion shaft, fixing the measuring device on the second standard rod, the extrusion shaft drives the second standard rod to move relative to the extrusion cylinder in the first direction and making the measuring device extend into the cavity of the extrusion cylinder, during the movement of the extrusion shaft, the measuring device can measure the change value of the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod;

[0010] S5. Determine whether the central axis of the extrusion shaft is offset relative to the central axis of the cavity of the extrusion cylinder based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod.

[0011] In some embodiments, in step S3, if the central axis of the cavity of the extrusion cylinder is offset relative to the central axis of the front beam outlet, the extrusion cylinder is adjusted so that the central axis of the cavity of the extrusion cylinder coincides with the central axis of the front beam outlet, and then step S4 is performed;

[0012] In the step S5, if the central axis of the extrusion shaft is offset relative to the central axis of the cavity of the extrusion cylinder, the extrusion shaft is adjusted so that the central axis of the extrusion shaft coincides with the central axis of the cavity of the extrusion cylinder.

[0013] In some embodiments, in step S2, during the movement of the extrusion cylinder, the measuring device may measure the distance change between the inner wall surfaces at both ends of the extrusion cylinder in the second direction and the inner wall surfaces at both ends in the third direction and the first standard rod in the radial direction of the first standard rod, and any two of the first direction, the second direction and the third direction are perpendicular to each other;

[0014] In step S4, during the movement of the extrusion shaft, the measuring device can measure the distance change between the inner wall surfaces at both ends of the extrusion cylinder in the second direction and the inner wall surfaces at both ends in the third direction and the second standard rod in the radial direction of the second standard rod.

[0015] In some embodiments, the straightness of the first standard rod and the second standard rod is less than or equal to 0.05 mm.

[0016] In some embodiments, in step S5, the extrusion axis is measured and adjusted using a measuring device so that during the movement of the extrusion axis in the first direction, the runout of the peripheral side surfaces at both ends of the second direction and the peripheral side surfaces at both ends of the third direction is less than or equal to 0.1 mm, and any two of the first direction, the second direction and the third direction are perpendicular to each other.

[0017] In some embodiments, in step S2, the outer diameter of the first end of the first standard rod is equal to the diameter of the front beam outlet, the first end of the first standard rod is installed in the front beam outlet, and the measuring device is fixed on the second end of the first standard rod;

[0018] In step S4, the outer diameter of the third end of the second standard rod is equal to the diameter of the rod cavity of the extrusion shaft, the third end of the second standard rod is installed in the rod cavity of the extrusion shaft, and the measuring device is fixed on the fourth end of the second standard rod.

[0019] In some embodiments, in step S2, a measuring device is fixed at multiple positions on the circumference of the first standard rod, and during the movement of the extrusion cylinder, the measuring device can measure the change value of the distance between the inner wall surface at multiple positions on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod;

[0020] In step S4, the measuring device is fixed at multiple positions on the circumference of the second standard rod, so that during the movement of the extrusion axis, the measuring device can measure the change in distance between the inner wall surface at multiple positions on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod.

[0021] In some embodiments, the measuring device is a dial indicator or a micrometer.

[0022] In some embodiments, the measuring device is fixed to the first standard rod and the second standard rod via a connecting frame, and a camera device is provided on the connecting frame;

[0023] In the step S1, a polishing machine is used to grind the graphite and bonding metal in the cavity of the extrusion cylinder.

[0024] The beneficial effect of the present invention is that the extruder centering detection method according to the embodiment of the present invention can facilitate the determination of whether the central axis of the cavity of the extrusion cylinder and the central axis of the extrusion shaft are offset, thereby facilitating the adjustment of the extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an extruder according to an embodiment of the present invention.

[0026] Figure 2 is a schematic diagram of a measuring device on a first standard rod according to an embodiment of the present invention.

[0027] Figure 3 is a schematic diagram of a measuring device on a second standard rod according to an embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of measuring the runout of an extrusion shaft according to an embodiment of the present invention.

[0029] Figure numerals: 1. front beam, 11. front beam outlet, 2. extrusion cylinder, 3. moving beam, 4. extrusion shaft, 5. mold. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] The following describes the extruder centering detection method of an embodiment of the present invention with reference to the accompanying drawings. The extruder includes a front beam 1, an extrusion cylinder 2 and a movable beam 3. The extension direction of the central axis of the front beam outlet 11 of the front beam 1 is a first direction. The extrusion cylinder 2 can move relative to the front beam 1 in the first direction, and the extrusion shaft 4 on the movable beam 3 can move relative to the extrusion cylinder 2 in the first direction. Specifically, the front beam outlet 11 of the front beam 1 is used to install the mold 5. After debugging, the central axis of the front beam outlet 11 of the extruder, the central axis of the cavity of the extrusion cylinder 2, and the central axis of the extrusion shaft 4 on the movable beam 3 coincide with each other, so as to extrude the ingot. In actual use, the central axis of the cavity of the extrusion cylinder 2 and the central axis of the extrusion shaft 4 on the movable beam 3 are prone to deviation, thereby reducing product quality.

[0032] like Figures 1 to 4 As shown, the method for detecting the centering of an extruder according to an embodiment of the present invention comprises the following steps:

[0033] S1. Clean the cavity in the extrusion barrel 2. Specifically, in step S1, a polishing machine is used to grind the graphite and bonding metal in the cavity in the extrusion barrel 2 so that the inner surface of the extrusion barrel 2 is clean and free of foreign matter.

[0034] S2. A portion of the first standard rod is mounted on the front beam 1 so that the central axis of the first standard rod coincides with the central axis of the front beam outlet 11, and a measuring device is fixed on the first standard rod. The extrusion cylinder 2 moves relative to the front beam 1 in a first direction and the measuring device is inserted into the cavity of the extrusion cylinder 2. During the movement of the extrusion cylinder 2, the measuring device can measure the change in the distance between the inner wall surface of at least one position in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod.

[0035] Specifically, the central axis of the first standard rod coincides with the central axis of the front beam outlet 11, so that the extension direction of the first standard rod is the first direction (the extension direction of the central axis of the front beam outlet 11), and the first standard rod is located at the center position of the front beam outlet 11, so that the first standard rod can be used as the central axis of the front beam outlet 11 for comparative measurement with the extrusion cylinder 2, so as to measure whether the central axis of the extrusion cylinder 2 is offset.

[0036] like Figure 2 As shown, after the measuring device is fixed on the first standard rod, during the movement of the extrusion cylinder 2 relative to the front beam 1 in the first direction, the measuring device can measure the change in distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod. In other words, during the movement of the measuring device in the first direction, the measuring device can measure the change in distance between the inner wall surface of one or more positions on the circumference of the extrusion cylinder 2 in the radial direction of the first standard rod (a direction perpendicular to the first direction). The change value measured by the measuring device can be regarded as the change in distance between the inner wall surface of the extrusion cylinder 2 and the central axis of the front beam outlet 11 (first standard rod) in the first direction.

[0037] S3. Determine whether the central axis of the cavity of the extrusion cylinder 2 is offset relative to the central axis of the front beam outlet 11 based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod.

[0038] Specifically, for the inner wall surface of the extrusion cylinder 2 whose inner diameter is constant in the first direction, if the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod is (basically) 0; or, the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod is less than or equal to the first preset value, it can be judged that the central axis of the cavity of the extrusion cylinder 2 has not shifted relative to the central axis of the front beam outlet 11. If the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod is greater than the first preset value, it is judged that the central axis of the cavity of the extrusion cylinder 2 has shifted relative to the central axis of the front beam outlet 11, and the extrusion cylinder 2 needs to be adjusted. So that the central axis of the extrusion cylinder 2 coincides with the central axis of the front beam outlet 11, so as to align the center of the extrusion cylinder 2 and the front beam outlet 11.

[0039] For the inner wall surface of the extrusion cylinder 2 whose inner diameter changes in the first direction, if the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod meets the design change value of the extrusion cylinder 2; or, after measuring the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod, the difference (distance) between the distance change value and the design change value is less than or equal to the first preset value, it can be judged that the central axis of the cavity of the extrusion cylinder 2 has not shifted relative to the central axis of the front beam outlet 11. If after measuring the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod, the difference (distance) between the distance change value and the design change value is greater than the first preset value, it can be judged that the central axis of the cavity of the extrusion cylinder 2 has shifted relative to the central axis of the front beam outlet 11, and the extrusion cylinder 2 needs to be adjusted. So that the central axis of the extrusion cylinder 2 coincides with the central axis of the front beam outlet 11, so as to align the center of the extrusion cylinder 2 and the front beam outlet 11.

[0040] S4, install a part of the second standard rod into the rod cavity of the extrusion shaft 4 so that the central axis of the second standard rod coincides with the central axis of the extrusion shaft 4, and fix the measuring device on the second standard rod. The extrusion shaft 4 drives the second standard rod to move relative to the extrusion cylinder 2 in the first direction and allows the measuring device to extend into the cavity of the extrusion cylinder 2. During the movement of the extrusion shaft 4, the measuring device can measure the change in the distance between the inner wall surface of at least one position in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod.

[0041] Specifically, the extrusion shaft 4 has a rod cavity opening toward the extrusion cylinder 2, a portion of the second standard rod is arranged in the rod cavity of the extrusion shaft 4, and the central axis of the second standard rod coincides with the central axis of the extrusion shaft 4, so that the extension direction of the second standard rod can be the extension direction of the extrusion shaft 4, and the second standard rod is located at the center position of the extrusion shaft 4, so that the second standard rod can be used as an extension of the extrusion shaft 4 and compared with the extrusion cylinder 2 for measuring whether the central axis of the extrusion shaft 4 is offset relative to the central axis of the extrusion cylinder 2.

[0042] like Figure 3 As shown, after the measuring device is fixed on the second standard rod, during the movement of the extrusion shaft 4, the measuring device can measure the change in distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod. That is to say, during the movement of the measuring device along the extension direction of the extrusion shaft 4, the measuring device can measure the change in distance between the inner wall surface of one or more positions on the circumference of the extrusion cylinder 2 in the radial direction of the second standard rod (a direction perpendicular to the extension direction of the central axis of the extrusion shaft 4). The change value measured by the measuring device can be regarded as the change in distance between the inner wall surface of the extrusion cylinder 2 and the extrusion shaft 4 (the second standard rod) in the extension direction of the central axis of the extrusion shaft 4.

[0043] S5. Determine whether the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2 based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod.

[0044] Specifically, for the inner wall surface of the extrusion cylinder 2 whose inner diameter remains unchanged in the first direction, if the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod is (basically) 0; or, the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod is less than or equal to the second preset value, it can be determined that the central axis of the cavity of the extrusion cylinder 2 is not offset relative to the central axis of the extrusion shaft 4. If the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod is greater than the second preset value, it can be determined that the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2, and the extrusion shaft 4 (moving beam 3) needs to be adjusted so that the central axis of the extrusion shaft 4 (moving beam 3) coincides with the central axis of the extrusion cylinder 2, so as to align the center of the extrusion shaft 4 (moving beam 3) and the extrusion cylinder 2.

[0045] For the inner wall surface of the extrusion cylinder 2 whose inner diameter changes in the first direction, if the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod meets the design change value of the extrusion cylinder 2; or, after measuring the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod, the difference (distance) between the distance change value and the design change value is less than or equal to the second preset value, it can be judged that the central axis of the extrusion shaft 4 is not offset relative to the central axis of the cavity of the extrusion cylinder 2. If after measuring the distance change value between the measured inner wall surface in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod, the difference (distance) between the distance change value and the design change value is greater than the second preset value, it can be judged that the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2, and the extrusion shaft 4 (moving beam 3) needs to be adjusted so that the central axis of the extrusion shaft 4 (moving beam 3) coincides with the central axis of the extrusion cylinder 2, so as to align the center of the extrusion shaft 4 (moving beam 3) and the extrusion cylinder 2.

[0046] In some embodiments, in step S3, if the central axis of the cavity of the extrusion cylinder 2 is offset relative to the central axis of the front beam outlet 11, the extrusion cylinder 2 is adjusted to make the central axis of the cavity of the extrusion cylinder 2 coincide with the central axis of the front beam outlet 11, and then step S4 is implemented. In other words, after the central axis of the cavity of the extrusion cylinder 2 is coincident with the central axis of the front beam outlet 11 (alignment of the center), whether the central axis of the extrusion shaft 4 is offset relative to the central axis of the extrusion cylinder 2 is measured and judged.

[0047] In some embodiments, in step S5, if the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2, the extrusion shaft 4 is adjusted so that the central axis of the extrusion shaft 4 coincides with the central axis of the cavity of the extrusion cylinder 2. Specifically, if the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2, the extrusion shaft 4 (moving beam 3) is adjusted with the central position of the extrusion cylinder 2 after the centering is aligned with the front beam outlet 11 as the center reference, so that the centering of the front beam outlet 11, the extrusion cylinder 2, the extrusion shaft, and the extrusion shaft 4 (moving beam 3) are aligned.

[0048] like Figure 4As shown, in some embodiments, in step S5, the extrusion shaft 4 is measured and adjusted by a measuring device so that the runout of the outer peripheral side surfaces at both ends of the second direction and the outer peripheral side surfaces at both ends of the third direction of the extrusion shaft 4 during the movement of the extrusion shaft 4 in the first direction is less than or equal to 0.1 mm, and any two of the first direction, the second direction and the third direction are perpendicular to each other. Specifically, a dial indicator or a micrometer can be used to measure the outer peripheral side surfaces at both ends of the second direction and the outer peripheral side surfaces at both ends of the third direction during the movement of the extrusion shaft 4 in the first direction. After the runout of the outer peripheral side surfaces at both ends of the second direction and the outer peripheral side surfaces at both ends of the third direction of the extrusion shaft 4 is less than or equal to 0.1 mm, the extrusion shaft 4 meets the requirements. The first direction may be the front-to-back direction, the second direction may be the left-to-right direction, and the third direction may be the up-down direction. For example, the extrusion shaft 4 is measured and adjusted by a measuring device so that the runout of the outer peripheral side surfaces at both ends of the left-to-right direction and the outer peripheral side surfaces at both ends of the up-down direction of the extrusion shaft 4 during the movement of the extrusion shaft 4 in the front-to-back direction is less than or equal to 0.1 mm.

[0049] In some embodiments, in step S2, during the movement of the extrusion cylinder 2, the measuring device can measure the distance change values ​​of the inner wall surfaces at both ends of the second direction and the inner wall surfaces at both ends of the third direction of the extrusion cylinder 2 from the first standard rod in the radial direction of the first standard rod, and any two of the first direction, the second direction and the third direction are perpendicular to each other. Specifically, the measuring device measures the distance change values ​​of the inner wall surfaces at multiple positions on the circumference of the extrusion cylinder 2 from the first standard rod in the radial direction of the first standard rod, so as to increase the measurement data, thereby improving the accuracy of the judgment. For example, during the movement of the extrusion cylinder 2 in the front-to-back direction, the measuring device can measure the distance change values ​​of the inner wall surfaces at both ends of the left-right direction and the inner wall surfaces at both ends of the up-down direction of the extrusion cylinder 2 from the first standard rod in the radial direction of the first standard rod.

[0050] In step S4, during the movement of the extrusion shaft 4, the measuring device can measure the change in distance between the inner wall surfaces at both ends of the second direction of the extrusion cylinder 2 and the inner wall surfaces at both ends in the third direction and the second standard rod in the radial direction of the second standard rod. Specifically, the measuring device can measure the change in distance between the inner wall surfaces at multiple positions in the circumferential direction of the extrusion cylinder 2 and the second standard rod in the radial direction of the second standard rod, so as to increase the measurement data, thereby improving the accuracy of the judgment. For example, during the movement of the extrusion shaft 4 in the front-to-back direction, the measuring device can measure the change in distance between the inner wall surfaces at both ends of the left-right direction of the extrusion cylinder 2 and the inner wall surfaces at both ends in the up-down direction and the second standard rod in the radial direction of the second standard rod.

[0051] In some embodiments, the straightness of the first standard rod and the second standard rod is less than or equal to 0.05 mm, thereby improving the accuracy of the measurement.

[0052] In some embodiments, in step S2, the outer diameter of the first end of the first standard rod is equal to the diameter of the front beam outlet 11, so that after the first end of the first standard rod is fitted in the front beam outlet 11, the central axis of the first standard rod is easy to coincide with the central axis of the front beam outlet 11. The first end of the first standard rod is installed in the front beam outlet 11, and the measuring device is fixed on the second end of the first standard rod, that is, the measuring device is fixed on the end of the first standard rod away from the front beam outlet 11.

[0053] In step S4, the outer diameter of the third end of the second standard rod is equal to the diameter of the rod cavity of the extrusion shaft 4, and the third end of the second standard rod is installed in the rod cavity of the extrusion shaft 4, so that after the third end of the second standard rod is fitted in the rod cavity of the extrusion shaft 4, the central axis of the second standard rod is easy to coincide with the central axis of the extrusion shaft 4. The measuring device is fixed on the fourth end of the second standard rod, that is, the measuring device is fixed on the end of the second standard rod away from the extrusion shaft 4.

[0054] In some embodiments, in step S2, the measuring device is fixed at multiple positions on the circumference of the first standard rod, and during the movement of the extrusion cylinder 2, the measuring device can measure the distance change between the inner wall surface of multiple positions on the circumference of the extrusion cylinder 2 and the first standard rod in the radial direction of the first standard rod. Specifically, multiple measuring devices can be arranged on the circumference of the first standard rod; or, the measuring device is fixed at different positions on the circumference of the first standard rod each time, and multiple measurements are performed to measure the inner wall surfaces at multiple positions.

[0055] In step S4, the measuring device is fixed at multiple positions on the circumference of the second standard rod, so that during the movement of the extrusion shaft 4, the measuring device can measure the distance change between the inner wall surface of the extrusion cylinder 2 at multiple positions on the circumference and the second standard rod in the radial direction of the second standard rod. Specifically, multiple measuring devices can be arranged on the circumference of the second standard rod; or, the measuring device is fixed at different positions on the circumference of the second standard rod each time, and multiple measurements are performed to measure the inner wall surface at multiple positions.

[0056] In some embodiments, the measuring device is a dial indicator or a micrometer. Specifically, during measurement, the side rod of the dial indicator or the micrometer contacts the inner surface of the extrusion cylinder 2 to measure the distance change during the movement in the first direction. For example, the dial indicator or the micrometer is a traditional mechanical meter or an electronic digital display meter.

[0057] In some embodiments, the measuring device is fixed to the first standard rod and the second standard rod through a connecting frame, and a camera device is provided on the connecting frame. Specifically, for a traditional mechanical meter, the value change of the dial indicator or micrometer can be observed at the opening of the extrusion cylinder 2, or the value change of the dial indicator or micrometer can be photographed by using the camera device on the connecting frame.

[0058] The method for detecting the centering of the extruder according to the embodiment of the present invention can facilitate the determination of whether the central axis of the cavity of the extrusion cylinder 2 and the central axis of the extrusion shaft 4 are offset. By first measuring whether the central axis of the cavity of the extrusion cylinder 2 is offset relative to the central axis of the front beam outlet 11, the extrusion cylinder 2 is measured and adjusted based on the center of the front beam 1, so that the front beam 1 coincides with the center of the extrusion cylinder 2. Then, measure whether the central axis of the extrusion shaft 4 is offset relative to the central axis of the cavity of the extrusion cylinder 2, and adjust the extrusion shaft 4 (moving beam 3) based on the extrusion cylinder 2, so that the center of the extrusion cylinder 2 coincides with the center of the extrusion shaft 4 (moving beam 3). The centers of the three components, the front beam 1, the extrusion cylinder 2 and the extrusion shaft 4 (moving beam 3), are in the same straight line, which ensures the operating accuracy of the equipment, reduces the eccentric wear of the equipment caused by uneven force, and improves the dimensional accuracy of the extruded products.

[0059] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for detecting the centering of an extruder, wherein the extruder comprises a front beam, an extrusion cylinder and a movable beam, wherein the central axis of the front beam outlet of the front beam extends in a first direction, the extrusion cylinder can move relative to the front beam in the first direction, and the extrusion shaft on the movable beam can move relative to the extrusion cylinder in the first direction, wherein: The extruder centering detection method comprises the following steps: S1, cleaning the cavity in the extrusion cylinder; S2, installing a part of the first standard rod on the front beam and making the central axis of the first standard rod coincide with the central axis of the outlet of the front beam, fixing a measuring device on the first standard rod, moving the extrusion cylinder relative to the front beam in the first direction and making the measuring device extend into the cavity of the extrusion cylinder, and during the movement of the extrusion cylinder, the measuring device can measure the change value of the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod; S3. Determine whether the central axis of the cavity of the extrusion cylinder is offset relative to the central axis of the front beam outlet based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod.

2. The method for detecting the centering of an extruder according to claim 1, characterized in that: The extruder neutralization detection method also includes the steps of: S4, installing a part of the second standard rod into the rod cavity of the extrusion shaft and making the central axis of the second standard rod coincide with the central axis of the extrusion shaft, fixing the measuring device on the second standard rod, the extrusion shaft drives the second standard rod to move relative to the extrusion cylinder in the first direction and making the measuring device extend into the cavity of the extrusion cylinder, during the movement of the extrusion shaft, the measuring device can measure the change value of the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod; S5. Determine whether the central axis of the extrusion shaft is offset relative to the central axis of the cavity of the extrusion cylinder based on the change in the distance between the inner wall surface of at least one position on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod.

3. The method for detecting the centering of an extruder according to claim 2, characterized in that: In the step S3, if the central axis of the cavity of the extrusion cylinder is offset from the central axis of the front beam outlet, the extrusion cylinder is adjusted so that the central axis of the cavity of the extrusion cylinder coincides with the central axis of the front beam outlet, and then the step S4 is implemented; In the step S5, if the central axis of the extrusion shaft is offset relative to the central axis of the cavity of the extrusion cylinder, the extrusion shaft is adjusted so that the central axis of the extrusion shaft coincides with the central axis of the cavity of the extrusion cylinder.

4. The method for detecting the centering of an extruder according to claim 2, characterized in that: In the step S2, during the movement of the extrusion cylinder, the measuring device can measure the distance change between the inner wall surfaces at both ends of the extrusion cylinder in the second direction and the inner wall surfaces at both ends in the third direction and the first standard rod in the radial direction of the first standard rod, and any two of the first direction, the second direction and the third direction are perpendicular to each other; In step S4, during the movement of the extrusion shaft, the measuring device can measure the distance change between the inner wall surfaces at both ends of the extrusion cylinder in the second direction and the inner wall surfaces at both ends in the third direction and the second standard rod in the radial direction of the second standard rod.

5. The method for detecting the centering of an extruder according to claim 2, characterized in that: The straightness of the first standard rod and the second standard rod is less than or equal to 0.05 mm.

6. The method for detecting the centering of an extruder according to claim 3, characterized in that: In step S5, the extrusion axis is measured and adjusted using a measuring device so that during the movement of the extrusion axis in the first direction, the runout of the peripheral side surfaces at both ends of the second direction and the peripheral side surfaces at both ends of the third direction is less than or equal to 0.1 mm, and any two of the first direction, the second direction and the third direction are perpendicular to each other.

7. The method for detecting the centering of an extruder according to claim 2, characterized in that: In the step S2, the outer diameter of the first end of the first standard rod is equal to the diameter of the front beam outlet, the first end of the first standard rod is installed in the front beam outlet, and the measuring device is fixed on the second end of the first standard rod; In step S4, the outer diameter of the third end of the second standard rod is equal to the diameter of the rod cavity of the extrusion shaft, the third end of the second standard rod is installed in the rod cavity of the extrusion shaft, and the measuring device is fixed on the fourth end of the second standard rod.

8. The method for detecting the centering of an extruder according to claim 2, characterized in that: In the step S2, a measuring device is fixed at a plurality of positions on the circumference of the first standard rod, and during the movement of the extrusion cylinder, the measuring device can measure the distance change between the inner wall surface at a plurality of positions on the circumference of the extrusion cylinder and the first standard rod in the radial direction of the first standard rod; In step S4, the measuring device is fixed at multiple positions on the circumference of the second standard rod, so that during the movement of the extrusion axis, the measuring device can measure the change in distance between the inner wall surface at multiple positions on the circumference of the extrusion cylinder and the second standard rod in the radial direction of the second standard rod.

9. The method for detecting the centering of an extruder according to any one of claims 1 to 8, characterized in that: The measuring device is a dial indicator or a micrometer.

10. The method for detecting the centering of an extruder according to claim 9, characterized in that: The measuring device is fixed on the first standard rod and the second standard rod via a connecting frame, and a camera device is provided on the connecting frame; In the step S1, a polishing machine is used to grind the graphite and bonding metal in the cavity of the extrusion cylinder.

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