Three-center alignment device and alignment method for extruder

Abstract

This invention relates to the field of extrusion press centering technology, specifically to a three-center centering device and method for an extrusion press. The three-center centering device includes a die replacement fixture, a pointing fixture, and an extrusion pad replacement fixture. The pointing fixture includes a pointing member, one end of which is inserted into the extrusion cylinder of the extrusion press. The outer wall of the pointing member has an annular boss with the same inner diameter as the extrusion cylinder. The tip of the pointer at one end of the pointing member coincides with the central axis of the annular boss. The end face of the die replacement fixture has a first ring whose center coincides with its central axis. The end face of the extrusion pad replacement fixture has a second ring whose center coincides with its central axis. The centering method is applied to the above-mentioned three-center centering device for an extrusion press. The three-center centering device and method for an extrusion press provided by this invention can realize the measurement and adjustment of the three centers of the extrusion press, and can achieve omnidirectional precision measurement of the extrusion cylinder and the die holder / extrusion rod, improving efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of extruder centering technology, and more specifically, to an extruder three-center centering device and centering method. Background Technology

[0002] The alignment of the die holder, extrusion cylinder, and extrusion rod in an extrusion press is extremely important. If the die holder and extrusion cylinder are misaligned, it will cause the dead zone of the die to shift, which will lead to dirt flowing into the die and affecting the quality. If the extrusion cylinder and extrusion rod are misaligned, it will cause some extrusion pads to wear on the extrusion cylinder, and the gap between the other extrusion pads and the extrusion cylinder will be too large, resulting in aluminum reverse bonding or even aluminum cladding on the extrusion rod, affecting production.

[0003] Currently, tools such as gauge rods and feeler gauges are generally used to measure the extruder and adjust the three centers for alignment, which is inefficient and inaccurate. Summary of the Invention

[0004] The purpose of this invention is to provide a three-center alignment device and method for an extruder, so as to alleviate the technical problems of low alignment efficiency and poor accuracy in the existing three-center alignment methods for extruders.

[0005] The extruder three-center alignment device provided by the present invention includes a die replacement tooling, a pointing tooling, and an extrusion pad replacement tooling.

[0006] The diameter of the mold replacement tooling is the same as the diameter of the mold, and it is used to install onto the mold seat of the extruder; the diameter of the extrusion pad replacement tooling is the same as the diameter of the extrusion pad, and it is used to install onto the extrusion rod of the extruder; the pointing tooling includes a pointing member, one end of which is used to insert into the extrusion cylinder of the extruder, and the outer wall of the pointing member is provided with an annular boss, the inner diameter of the extrusion cylinder is the same as that of the annular boss, and the annular boss is used to abut against the end face of the extrusion cylinder.

[0007] One end of the pointing component is provided with a pointer, the tip of which coincides with the central axis of the annular boss; the end face of the mold replacement tool is provided with a first ring, the center of which coincides with the central axis of the mold replacement tool, and the radius of the first ring is less than or equal to the expected alignment accuracy between the mold base and the extrusion cylinder; the end face of the extrusion pad replacement tool is provided with a second ring, the center of which coincides with the central axis of the extrusion pad replacement tool, and the radius of the second ring is less than or equal to the expected alignment accuracy between the extrusion rod and the extrusion cylinder.

[0008] Preferably, as one possible implementation, the end face of the mold replacement tooling is provided with a first angle pointing line, the first angle pointing line coincides with the center of the first ring and is perpendicular to the translation direction of the mold base;

[0009] And / or, the end face of the extrusion pad substitute tool is provided with a second angle pointing line, the second angle pointing line coincides with the center of the second ring and is perpendicular to the translation direction of the extrusion rod.

[0010] Preferably, as one possible implementation, there are two first angle pointing lines that are perpendicular to each other, and the end face of the mold replacement tooling is also provided with a third angle pointing line, wherein the two third angle pointing lines are the angle bisectors of the two first angle pointing lines respectively.

[0011] And / or, the second angle pointing lines are two and perpendicular to each other, and the end face of the extrusion pad substitute tool is also provided with a fourth angle pointing line, and the two fourth angle pointing lines are the angle bisectors of the two second angle pointing lines respectively.

[0012] Preferably, as one possible implementation, the end face of the mold replacement tooling is further provided with several concentric circles, the center of the first concentric circle coincides with the center of the first ring, and the radius of the first concentric circle is greater than the radius of the first ring, and the radius difference between the innermost first concentric circle and the first ring, as well as the radius difference between two adjacent first concentric circles, are constant values.

[0013] And / or, the end face of the extrusion pad substitute tool is further provided with several concentric circles, the center of the second concentric circle coincides with the center of the second ring, and the radius of the second concentric circle is greater than the radius of the second ring, and the radius difference between the innermost second concentric circle and the second ring, as well as the radius difference between two adjacent concentric circles, are constant values.

[0014] Preferably, as one possible implementation, the radius difference between any two adjacent first concentric circles is equal to the radius difference between the innermost first concentric circle and the first ring.

[0015] And / or, the radius difference between any two adjacent second concentric circles is equal to the radius difference between the innermost second concentric circle and the second ring.

[0016] Preferably, as one possible implementation, the pointing tooling further includes a tensioning rope and a positioning element, the positioning element and the pointing element being used to abut against both ends of the extrusion cylinder, and the tensioning rope being tensioned between the pointing element and the positioning element.

[0017] Preferably, as one possible implementation, the tensioning rope is attached to the positioning member;

[0018] And / or, the positioning element is rod-shaped, and the length of the positioning element is greater than the inner diameter of the extrusion cylinder.

[0019] Preferably, as one possible implementation, the outer wall of the pointer is provided with multiple annular bosses along the axial direction, and in any two annular bosses, the inner diameter of the annular boss closer to the pointer is larger than the inner diameter of the other annular boss; the outer diameter of the part of the pointer located between any two adjacent annular bosses gradually decreases or remains unchanged from one end closer to the pointer to the other end.

[0020] Preferably, as one possible implementation, the multiple ring-shaped bosses are arranged at equal intervals along the axial direction;

[0021] And / or, the difference in the inner diameter of any two adjacent annular bosses is the same.

[0022] The present invention also provides a centering method applied to the three-center centering device of the extruder, the centering method including a centering method between the die holder and the extrusion cylinder and a centering method between the extrusion rod and the extrusion cylinder.

[0023] The alignment method between the mold base and the extrusion cylinder includes: installing the mold replacement tooling onto the mold base; inserting the end of the pointing member facing away from the pointer into the extrusion cylinder from the end of the extrusion cylinder facing the mold base until the annular boss abuts against the end face of the extrusion cylinder; if the pointer points to the inside of the first ring, it is determined that the alignment between the mold base and the extrusion cylinder is qualified; if the pointer points to the outside of the first ring, it is determined that the alignment between the mold base and the extrusion cylinder is unqualified, and adjusting the mold base until the pointer points to the inside of the first ring.

[0024] The alignment method between the extrusion rod and the extrusion cylinder includes: installing the extrusion pad as a substitute tooling onto the extrusion rod; inserting the end of the pointing member opposite to the pointer into the extrusion cylinder from the end of the extrusion cylinder facing the extrusion rod until the annular boss abuts against the end face of the extrusion cylinder; if the pointer points to the inside of the second ring, it is determined that the extrusion rod and the extrusion cylinder are aligned successfully; if the pointer points to the outside of the second ring, it is determined that the extrusion rod and the extrusion cylinder are not aligned successfully, and the extrusion rod is adjusted until the pointer points to the inside of the second ring.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] The extruder three-center alignment device provided by this invention, after the pointing component is installed inside the extrusion cylinder, the annular boss coincides with the central axis of the extrusion cylinder. Correspondingly, the tip of the pointer on the pointing component coincides with the central axis of the extrusion cylinder, that is, the tip of the pointer coincides with the central axis of the extrusion cylinder. In use, by adjusting the installation direction of the pointing fixture, the alignment measurement and adjustment of the mold seat and the extrusion cylinder, as well as the alignment measurement and adjustment of the extrusion rod and the extrusion cylinder, can be realized respectively. And according to the direction of the pointer on the pointing component, it can be determined whether the alignment accuracy of the mold seat, the extrusion cylinder and the extrusion rod is qualified.

[0027] Specifically, when aligning and adjusting the mold base and the extrusion cylinder, a mold substitute fixture is installed on the mold base, with the end face of the mold substitute fixture having the first ring facing the extrusion cylinder. At the same time, a pointing component is installed inside the extrusion cylinder from the end facing the mold base, with the pointer of the pointing component pointing towards the mold substitute fixture. If the pointer points into the first ring of the mold substitute fixture, it indicates that the extrusion cylinder and the mold base meet the expected alignment accuracy requirements. If the pointer points out of the first ring of the mold substitute fixture, it indicates that the extrusion cylinder and the mold base do not meet the expected alignment accuracy requirements. In this case, the mold base can be adjusted until the pointer points into the first ring of the mold substitute fixture, thus completing the alignment adjustment of the mold base and the extrusion cylinder. Accordingly, when aligning and adjusting the extrusion rod and extrusion cylinder, an extrusion pad substitute fixture is installed on the extrusion rod, with the end face of the extrusion pad substitute fixture having the second ring facing the extrusion cylinder. Simultaneously, a pointing device is installed inside the extrusion cylinder from the end facing the extrusion rod, with the pointer of the pointing device pointing towards the extrusion pad substitute fixture. If the pointer points into the second ring of the extrusion pad substitute fixture, it indicates that the extrusion cylinder and extrusion rod meet the expected alignment accuracy requirements. If the pointer points out of the second ring of the extrusion pad substitute fixture, it indicates that the extrusion cylinder and extrusion rod do not meet the expected alignment accuracy requirements. In this case, the extrusion rod can be adjusted until the pointer points into the second ring of the extrusion rod substitute fixture, thus completing the alignment adjustment of the extrusion rod and extrusion cylinder.

[0028] Therefore, the extruder three-center alignment device provided by the present invention can realize the measurement and adjustment of the three-center alignment of the extruder, and judge the alignment accuracy by using the alignment of the pointer with the first ring / second ring. It can realize the all-round accuracy measurement of the extrusion cylinder and the die seat / extrusion rod, improve the efficiency of the extruder three-center alignment, and has high accuracy.

[0029] The centering method provided by this invention, applied to the above-mentioned three-center centering device for extruders, possesses all the advantages of the device. It can realize the three-center centering measurement and adjustment of the extruder, and by using the alignment of the pointer with the first / second ring, the centering accuracy can be determined. It can achieve all-round accuracy measurement of the extrusion cylinder and the die holder / extrusion rod, improving the efficiency and accuracy of the three-center centering of the extruder. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the assembly structure of the extruder three-center alignment device and the extruder provided in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of section A;

[0033] Figure 3 This is a schematic diagram of the end face of the die replacement tooling in the three-center alignment device of the extruder provided in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the end face of the extrusion pad replacing the tooling in the three-center alignment device of the extruder provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100 - Mold replacement tooling; 110 - First ring; 120 - First angle pointing line; 130 - Third angle pointing line; 140 - First concentric circle;

[0037] 200 - Pointing fixture; 210 - Pointing component; 211 - Annular boss; 212 - Pointer; 220 - Tensioning rope; 230 - Positioning component;

[0038] 300 - Extrusion pad replacement tooling; 310 - Second ring; 320 - Second angle pointing line; 330 - Fourth angle pointing line; 340 - Second concentric circle;

[0039] 400-Mold base;

[0040] 500 - Extrusion cylinder;

[0041] 600 - Extrusion bar. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0044] See Figures 1-4 This embodiment provides a three-center alignment device for an extruder, comprising a die replacement tool 100, a pointing tool 200, and an extrusion pad replacement tool 300. The diameter of the die replacement tool 100 is the same as the diameter of the die, and it is used to install onto the die holder 400 of the extruder. The diameter of the extrusion pad replacement tool 300 is the same as the diameter of the extrusion pad, and it is used to install onto the extrusion rod 600 of the extruder. The pointing tool 200 includes a pointing member 210, one end of which is used to insert into the extrusion cylinder 500 of the extruder. The outer wall of the pointing member 210 is provided with an annular boss 211, and the inner diameter of the extrusion cylinder 500 is the same as that of the annular boss 211. The annular boss 211 is used to engage with the extrusion cylinder 500. The end face of 0 is in contact with the contact; one end of the pointing member 210 is provided with a pointer 212, the tip of the pointer 212 coincides with the central axis of the annular boss 211; the end face of the mold replacement tooling 100 is provided with a first ring 110, the center of the first ring 110 coincides with the central axis of the mold replacement tooling 100, and the radius of the first ring 110 is less than or equal to the expected alignment accuracy between the mold seat 400 and the extrusion cylinder 500; the end face of the extrusion pad replacement tooling 300 is provided with a second ring 310, the center of the second ring 310 coincides with the central axis of the extrusion pad replacement tooling 300, and the radius of the second ring 310 is less than or equal to the expected alignment accuracy between the extrusion rod 600 and the extrusion cylinder 500.

[0045] After the pointing component 210 is installed inside the extrusion cylinder 500, the annular boss 211 coincides with the central axis of the extrusion cylinder 500. Correspondingly, the tip of the pointer 212 on the pointing component 210 coincides with the central axis of the extrusion cylinder 500. In use, the alignment measurement and adjustment of the mold base 400 and the extrusion cylinder 500, as well as the alignment measurement and adjustment of the extrusion rod 600 and the extrusion cylinder 500, can be achieved by adjusting the installation direction of the pointing fixture 200. The alignment accuracy of the mold base 400, the extrusion cylinder 500, and the extrusion rod 600 can be determined according to the direction of the pointer 212 on the pointing component 210.

[0046] Specifically, see Figure 1When aligning and adjusting the mold base 400 and the extrusion cylinder 500, the mold replacement fixture 100 is installed on the mold base 400, with the end face of the mold replacement fixture 100 having the first ring 110 facing the extrusion cylinder 500; simultaneously, the pointing member 210 is installed from the end of the extrusion cylinder 500 facing the mold base 400 into the extrusion cylinder 500, so that the pointer 212 of the pointing member 210 points towards the mold replacement fixture 100. If the pointer 212 points towards the mold replacement fixture... If the pointer 212 is inside the first ring 110 of the die replacement tooling 100, it indicates that the extrusion cylinder 500 and the die holder 400 meet the expected alignment accuracy requirements. If the pointer 212 is outside the first ring 110 of the die replacement tooling 100, it indicates that the extrusion cylinder 500 and the die holder 400 do not meet the expected alignment accuracy requirements. At this time, the die holder 400 can be adjusted until the pointer 212 is inside the first ring 110 of the die replacement tooling 100 to complete the alignment adjustment of the die holder 400 and the extrusion cylinder 500. Accordingly, when aligning and adjusting the extrusion rod 600 and the extrusion cylinder 500, the extrusion pad replacement fixture 300 is installed on the extrusion rod 600, with the end face of the extrusion pad replacement fixture 300 having the second ring 310 facing the extrusion cylinder 500; simultaneously, the pointing member 210 is installed from the end of the extrusion cylinder 500 facing the extrusion rod 600 into the extrusion cylinder 500, so that the pointer 212 of the pointing member 210 points towards the extrusion pad replacement fixture 300. If the pointer 212 points towards the extrusion pad... If the pointer 212 points inside the second ring 310 of the replacement tooling 300, it indicates that the extrusion cylinder 500 and the extrusion rod 600 meet the expected alignment accuracy requirements. If the pointer 212 points outside the second ring 310 of the replacement tooling 300, it indicates that the extrusion cylinder 500 and the extrusion rod 600 do not meet the expected alignment accuracy requirements. In this case, the extrusion rod 600 can be adjusted until the pointer 212 points inside the second ring 310 of the replacement tooling 300, thus completing the alignment adjustment of the extrusion rod 600 and the extrusion cylinder 500.

[0047] Therefore, the extruder three-center alignment device provided in this embodiment can realize the measurement and adjustment of the three-center alignment of the extruder, and use the alignment of pointer 212 with the first ring 110 / second ring 310 to judge the alignment accuracy. It can realize the all-round accuracy measurement of extrusion cylinder 500 and die seat 400 / extrusion rod 600, improve the efficiency of extruder three-center alignment, and has high accuracy.

[0048] Specifically, the expected alignment accuracy between the mold base 400 and the extrusion cylinder 500 can be 0.5mm, and the expected alignment accuracy between the extrusion rod 600 and the extrusion cylinder 500 can also be 0.5mm. The thickness of the mold replacement tooling 100 can be set to be the same as that of the mold. In this way, by inserting the mold replacement tooling 100 into the mold base 400, the cooperation between the mold replacement tooling 100 and the mold base 400 can be achieved.

[0049] Preferably, a first angle pointing line 120 can be provided on the end face of the mold replacement tooling 100, so that the first angle pointing line 120 coincides with the center of the first ring 110 and the first angle pointing line 120 is perpendicular to the translation direction of the mold base 400. In this way, when the extrusion cylinder 500 and the mold base 400 do not meet the expected alignment accuracy requirements, the first angle pointing line 120 can be used as a reference baseline for adjusting the mold base 400, and the mold base 400 can be controlled to translate in a direction closer to the first angle pointing line 120, so as to reduce the radial distance between the pointer 212 and the center of the first ring 110, so that the pointer 212 can smoothly point into the first ring 110. In this way, the alignment adjustment efficiency of the mold base 400 and the extrusion cylinder 500 can be improved.

[0050] Correspondingly, a second angle pointing line 320 can be provided on the end face of the extrusion pad replacement tool 300, so that the second angle pointing line 320 coincides with the center of the second ring 310 and is perpendicular to the translation direction of the extrusion rod 600. In this way, when the extrusion cylinder 500 and the extrusion rod 600 do not meet the expected alignment accuracy requirements, the second angle pointing line 320 can be used as a reference baseline for adjusting the extrusion rod 600, and the extrusion rod 600 can be controlled to translate in a direction closer to the second angle pointing line 320, so as to reduce the radial distance between the tip of the pointer 212 and the center of the second ring 310, so that the pointer 212 can smoothly point into the second ring 310. In this way, the alignment adjustment efficiency of the extrusion rod 600 and the extrusion cylinder 500 can be improved.

[0051] For a mold base 400 that can translate along two mutually perpendicular translation directions, two first angle pointing lines 120 on the mold replacement tooling 100 can be set, and the two first angle pointing lines 120 can be made perpendicular to each other. In this way, the two first angle pointing lines 120 can be perpendicular to the two mutually perpendicular translation directions (horizontal and vertical directions) of the mold base 400. Thus, the two first angle pointing lines 120 can be used as reference baselines for adjusting the mold base 400, and the mold base 400 can be controlled to translate along its two translation directions toward the direction of the corresponding first angle pointing line 120, which can further improve the alignment adjustment efficiency between the mold base 400 and the extrusion cylinder 500. Based on this, a third angle pointing line 130 can be set on the end face of the mold replacement tooling 100. The two third angle pointing lines 130 are the angle bisectors of the two first angle pointing lines 120 respectively. In this way, the third angle pointing line 130 can be used as an auxiliary reference line for adjusting the mold base 400. When the pointer 212 points between a certain first angle pointing line 120 and a certain third angle pointing line 130, the mold base 400 is controlled to move in a direction parallel to the first angle pointing line 120 towards the other first angle pointing line 120 until the pointer points into the first ring 110. This can further improve the alignment adjustment efficiency between the mold base 400 and the extrusion cylinder 500.

[0052] Accordingly, for the extrusion rod 600, which can translate along two mutually perpendicular translation directions, the extrusion pad can be replaced by two second angle pointing lines 320 on the tooling 300, and the two second angle pointing lines 320 can be made perpendicular to each other. In this way, the two second angle pointing lines 320 can be perpendicular to the two mutually perpendicular translation directions (horizontal and vertical directions) of the extrusion rod 600. Thus, the two second angle pointing lines 320 can be used as reference baselines for adjusting the extrusion rod 600, and the extrusion rod 600 can be controlled to translate along its two translation directions toward the corresponding second angle pointing lines 320, which can further improve the alignment adjustment efficiency of the extrusion rod 600 and the extrusion cylinder 500. Based on this, a fourth angle pointing line 330 can be set on the end face of the extrusion pad replacement tool 300. The two fourth angle pointing lines 330 are the angle bisectors of the two second angle pointing lines 320 respectively. In this way, the fourth angle pointing line 330 can be used as an auxiliary reference line for adjusting the extrusion rod 600. When the pointer 212 points between a certain second angle pointing line 320 and a certain fourth angle pointing line 330, the extrusion rod 600 is controlled to move in a direction parallel to the second angle pointing line 320 towards the other second angle pointing line 320 until the pointer points into the second ring 310. This can further improve the centering adjustment efficiency of the extrusion rod 600 and the extrusion cylinder 500.

[0053] Several concentric circles 140 can be set on the end face of the mold replacement tooling 100. The center of each concentric circle 140 is set to coincide with the center of the first ring 110, and the radius of the concentric circle 140 is set to be greater than the radius of the first ring 110. The radius difference between the innermost concentric circle 140 and the first ring 110, as well as the radius difference between two adjacent concentric circles 140, are set to fixed values. In this way, the approximate radial difference between the tip of the pointer 212 and the center of the first ring 110 can be determined by observing the direction of the pointer 212. The mold base 400 can be adjusted based on this radial difference, which can further improve the alignment adjustment efficiency between the mold base 400 and the extrusion cylinder 500.

[0054] Correspondingly, several concentric circles 340 can be set on the end face of the extrusion pad replacement tool 300. The center of each concentric circle 340 is set to coincide with the center of the second ring 310, and the radius of the concentric circle 340 is set to be greater than the radius of the second ring 310. The radius difference between the innermost concentric circle 340 and the second ring 310, as well as the radius difference between two adjacent concentric circles 340, are set to fixed values. In this way, by observing the direction of the pointer 212, the approximate radial difference between the tip of the pointer 212 and the center of the second ring 310 can be determined. The extrusion rod 600 can be adjusted based on this radial difference, which can further improve the alignment adjustment efficiency between the extrusion rod 600 and the extrusion cylinder 500.

[0055] The radius difference between any two adjacent first concentric circles 140 can be set to be equal to the radius difference between the innermost first concentric circle 140 and the first ring 110, which facilitates the calculation of the approximate radial difference between the tip of the pointer 212 and the center of the first ring 110. Specifically, the radius difference between any two adjacent first concentric circles 140 and the radius difference between the innermost first concentric circle 140 and the first ring 110 can both be set to 0.5mm.

[0056] Accordingly, the radius difference between any two adjacent second concentric circles 340 can be set to be equal to the radius difference between the innermost second concentric circle 340 and the second ring 310, which facilitates the calculation of the approximate radial difference between the tip of the pointer 212 and the center of the second ring 310. Specifically, the radius difference between any two adjacent second concentric circles 340 and the radius difference between the innermost second concentric circle 340 and the second ring 310 can both be set to 0.5mm.

[0057] In the specific structure of the pointing tool 200, a tension rope 220 and a positioning member 230 can also be provided. The positioning member 230 and the pointing member 210 are respectively abutted against the two ends of the extrusion cylinder 500. The tension rope 220 is tensioned and connected between the pointing member 210 and the positioning member 230. The tension rope 220 is used to pull the pointing member 210 and the positioning member 230 to maintain the abutment state between the annular boss 211 on the pointing member 210 and the extrusion cylinder 500.

[0058] Specifically, the tensioning rope 220 can be tied to the positioning component 230, making the operation convenient.

[0059] The positioning element 230 can be configured as a rod-shaped structure, and the length of the positioning element 230 can be set to be greater than the inner diameter of the extrusion cylinder 500. In this way, the positioning element 230 can remain in contact with the extrusion cylinder 500 after being tightened by the tensioning rope 220.

[0060] Multiple annular bosses 211 can be axially arranged on the outer wall of the pointer 210. In any two annular bosses 211, the inner diameter of the annular boss 211 closer to the pointer 212 is set to be larger than the inner diameter of the other annular boss 211. The outer diameter of the part of the pointer 210 located between any two adjacent annular bosses 211 is set to gradually decrease or remain unchanged from one end closer to the pointer 212 to the other end. In this way, the insertion depth of the pointer 210 into the extrusion cylinder 500 can be adjusted according to the actual inner diameter of the extrusion cylinder 500 until one of the annular bosses 211 of the pointer 210 is blocked by the extrusion cylinder 500 and cannot continue to penetrate. At this time, the inner diameter of the annular boss 211 that abuts against the extrusion cylinder 500 is basically consistent with the actual inner diameter of the extrusion cylinder 500, which can solve the problem of the inner diameter of the extrusion cylinder 500 increasing due to wear.

[0061] Preferably, the outer diameter of the part of the pointer 210 located between any two adjacent annular bosses 211 is set to remain constant from one end to the other, that is, the part of the pointer 210 located between any two adjacent annular bosses 211 is cylindrical, which can improve the positioning effect of the extrusion cylinder 500 on the pointer 210, so that the tip of the pointer 212 on the pointer 210 and the central axis of the extrusion cylinder 500 maintain a high degree of overlap.

[0062] The multiple annular bosses 211 can be arranged at equal intervals along the axial direction to make full use of the axial length of the pointing member 210.

[0063] The difference in the inner diameter of any two adjacent annular bosses 211 can be set to be the same, which facilitates machining. Specifically, the difference in the inner diameter of any two adjacent annular bosses 211 can be set to 0.1mm.

[0064] Specifically, the pointer 212 on the aforementioned pointing component 210 can be conical in shape.

[0065] This embodiment also provides a centering method, which is applied to the above-mentioned three-center centering device of the extruder. The centering method includes a centering method between the die holder 400 and the extrusion cylinder 500 and a centering method between the extrusion rod 600 and the extrusion cylinder 500.

[0066] The alignment method between the mold base 400 and the extrusion cylinder 500 includes: installing the mold replacement tooling 100 onto the mold base 400; inserting the end of the pointing member 210 opposite to the pointer 212 into the extrusion cylinder 500 from the end of the extrusion cylinder 500 facing the mold base 400 until the annular boss 211 abuts against the end face of the extrusion cylinder 500; if the pointer 212 points to the inside of the first ring 110, it is determined that the alignment between the mold base 400 and the extrusion cylinder 500 is qualified; if the pointer 212 points to the outside of the first ring 110, it is determined that the alignment between the mold base 400 and the extrusion cylinder 500 is unqualified, and adjusting the mold base 400 until the pointer 212 points to the inside of the first ring 110.

[0067] The alignment method between the extrusion rod 600 and the extrusion cylinder 500 includes: installing the extrusion pad replacement tool 300 onto the extrusion rod 600; inserting the end of the pointing member 210 opposite to the pointer 212 into the extrusion cylinder 500 from the end facing the extrusion rod 600 until the annular boss 211 abuts against the end face of the extrusion cylinder 500; if the pointer 212 points to the inside of the second ring 310, it is determined that the extrusion rod 600 and the extrusion cylinder 500 are aligned successfully; if the pointer 212 points to the outside of the second ring 310, it is determined that the extrusion rod 600 and the extrusion cylinder 500 are not aligned successfully, and adjusting the extrusion rod 600 until the pointer 212 points to the inside of the second ring 310.

[0068] The alignment method provided in this embodiment, being applied to the above-mentioned three-center alignment device for extruders, possesses all the advantages of the device. It enables the measurement and adjustment of the three-center alignment of the extruder, and by using the alignment of pointer 212 with the first ring 110 / second ring 310, the alignment accuracy can be determined. This allows for omnidirectional accuracy measurement of the extrusion cylinder 500 and the die holder 400 / extrusion rod 600, improving the efficiency and accuracy of the three-center alignment of the extruder.

[0069] In the alignment method between the mold base 400 and the extrusion cylinder 500, after the installation of the mold replacement tool 100 and the pointing member 210 is completed, the extrusion cylinder 500 can be driven to move towards the mold base 400 until the distance between the pointer 212 and the mold replacement tool 100 reaches within a preset distance (e.g., 3 mm). Then, the direction of the pointer 212 is observed, which can improve the observation accuracy and thus improve the alignment accuracy between the mold base 400 and the extrusion cylinder 500. Preferably, the distance between the pointer 212 and the mold replacement tool 100 is adjusted to a range of 2~3 mm.

[0070] In the alignment method between the extrusion rod 600 and the extrusion cylinder 500, after the installation of the extrusion pad replacement fixture 300 and the pointing component 210 is completed, the extrusion cylinder 500 can be driven to move towards the extrusion rod 600 until the distance between the pointer 212 and the extrusion pad replacement fixture 300 reaches a preset distance (e.g., 3 mm). Then, the direction of the pointer 212 is observed, which can improve the observation accuracy and thus improve the alignment accuracy between the extrusion rod 600 and the extrusion cylinder 500. Preferably, the distance between the pointer 212 and the extrusion pad replacement fixture 300 is adjusted to a range of 2~3 mm.

[0071] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-center alignment device for an extruder, characterized in that, This includes mold replacement tooling, pointing tooling, and extrusion pad replacement tooling; The diameter of the mold replacement tooling is the same as the diameter of the mold, and it is used to install onto the mold seat of the extruder; the diameter of the extrusion pad replacement tooling is the same as the diameter of the extrusion pad, and it is used to install onto the extrusion rod of the extruder; the pointing tooling includes a pointing member, one end of which is used to insert into the extrusion cylinder of the extruder, and the outer wall of the pointing member is provided with an annular boss, the inner diameter of the extrusion cylinder is the same as that of the annular boss, and the annular boss is used to abut against the end face of the extrusion cylinder; One end of the pointing component is provided with a pointer, the tip of which coincides with the central axis of the annular boss; the end face of the mold replacement tool is provided with a first ring, the center of which coincides with the central axis of the mold replacement tool, and the radius of the first ring is less than or equal to the expected alignment accuracy between the mold base and the extrusion cylinder; the end face of the extrusion pad replacement tool is provided with a second ring, the center of which coincides with the central axis of the extrusion pad replacement tool, and the radius of the second ring is less than or equal to the expected alignment accuracy between the extrusion rod and the extrusion cylinder.

2. The three-center alignment device for an extruder according to claim 1, characterized in that, The end face of the mold replacement tooling is provided with a first angle pointing line, which coincides with the center of the first ring and is perpendicular to the translation direction of the mold base. And / or, the end face of the extrusion pad substitute tool is provided with a second angle pointing line, the second angle pointing line coincides with the center of the second ring and is perpendicular to the translation direction of the extrusion rod.

3. The three-center alignment device for an extruder according to claim 2, characterized in that, The first angle pointing line is two and they are perpendicular to each other. The end face of the mold replacement tooling is also provided with a third angle pointing line. The two third angle pointing lines are the angle bisectors of the two first angle pointing lines. And / or, the second angle pointing lines are two and perpendicular to each other, and the end face of the extrusion pad substitute tool is also provided with a fourth angle pointing line, and the two fourth angle pointing lines are the angle bisectors of the two second angle pointing lines respectively.

4. The three-center alignment device for an extruder according to claim 1, characterized in that, The end face of the mold replacement tooling is also provided with several concentric circles. The center of the first concentric circle coincides with the center of the first ring, and the radius of the first concentric circle is greater than the radius of the first ring. The radius difference between the innermost first concentric circle and the first ring, as well as the radius difference between two adjacent first concentric circles, are constant values. And / or, the end face of the extrusion pad substitute tool is further provided with several concentric circles, the center of the second concentric circle coincides with the center of the second ring, and the radius of the second concentric circle is greater than the radius of the second ring, and the radius difference between the innermost second concentric circle and the second ring, as well as the radius difference between two adjacent concentric circles, are constant values.

5. The three-center alignment device for an extruder according to claim 4, characterized in that, The difference in radius between any two adjacent first concentric circles is equal to the difference in radius between the innermost first concentric circle and the first ring. And / or, the radius difference between any two adjacent second concentric circles is equal to the radius difference between the innermost second concentric circle and the second ring.

6. The three-center alignment device for an extruder according to claim 1, characterized in that, The pointing fixture also includes a tensioning rope and a positioning element. The positioning element and the pointing element are respectively used to abut against the two ends of the extrusion cylinder. The tensioning rope is tensioned between the pointing element and the positioning element.

7. The three-center alignment device for an extruder according to claim 6, characterized in that, The tensioning rope is attached to the positioning component; And / or, the positioning element is rod-shaped, and the length of the positioning element is greater than the inner diameter of the extrusion cylinder.

8. The three-center alignment device for an extruder according to any one of claims 1-7, characterized in that, The outer wall of the pointer is provided with multiple rings of annular bosses along the axial direction, and in any two rings of annular bosses, the inner diameter of the annular boss closer to the pointer is larger than the inner diameter of the other annular boss; the outer diameter of the part of the pointer located between any two adjacent rings of annular bosses gradually decreases or remains unchanged from the end closer to the pointer to the other end.

9. The three-center alignment device for an extruder according to claim 8, characterized in that, The annular bosses described in multiple rings are arranged at equal intervals along the axial direction; And / or, the difference in the inner diameter of any two adjacent annular bosses is the same.

10. A centering method, characterized in that, The three-center alignment device for an extruder as described in any one of claims 1-9, wherein the alignment method includes an alignment method between the die holder and the extrusion cylinder and an alignment method between the extrusion rod and the extrusion cylinder; The alignment method between the mold base and the extrusion cylinder includes: installing the mold replacement tooling onto the mold base; inserting the end of the pointing member facing away from the pointer into the extrusion cylinder from the end of the extrusion cylinder facing the mold base until the annular boss abuts against the end face of the extrusion cylinder; if the pointer points to the inside of the first ring, the alignment between the mold base and the extrusion cylinder is deemed successful; if the pointer points to the outside of the first ring, the alignment between the mold base and the extrusion cylinder is deemed unsuccessful, and the mold base is adjusted until the pointer points to the inside of the first ring. The alignment method between the extrusion rod and the extrusion cylinder includes: installing the extrusion pad as a substitute tooling onto the extrusion rod; inserting the end of the pointing member opposite to the pointer into the extrusion cylinder from the end of the extrusion cylinder facing the extrusion rod until the annular boss abuts against the end face of the extrusion cylinder; if the pointer points to the inside of the second ring, it is determined that the extrusion rod and the extrusion cylinder are aligned successfully; if the pointer points to the outside of the second ring, it is determined that the extrusion rod and the extrusion cylinder are not aligned successfully, and the extrusion rod is adjusted until the pointer points to the inside of the second ring.

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