Extruder concentricity measuring device

Abstract

The utility model relates to an extruder concentricity measuring device, which belongs to the technical field of extruder detection, and comprises a core measuring jig, the core measuring jig is coaxially arranged at the end part of an extrusion rod, the core measuring jig comprises a measuring shaft, a first measuring disc is coaxially arranged at the end part of the measuring shaft, and a second measuring disc is coaxially arranged at the end part of the measuring shaft; at least four U-shaped grooves are formed in the first measuring disc in a circumferential array mode, and measuring units are detachably installed in the U-shaped grooves and used for detecting the distance from the edge of the first measuring disc to the inner wall of the extrusion cylinder. According to the device, the core measuring jig is arranged, and the measuring shaft of the core measuring jig is coaxially mounted at the end part of the extrusion rod and can be extended, so that when the end part of the extrusion rod is arranged in the middle of the extrusion cylinder, the measuring shaft can extend out of the extrusion cylinder, and measurement is convenient; the first measuring disc can reduce the distance from the side wall of the extrusion cylinder to facilitate the detection of the actual distance.

Description

Technical Field

[0001] The utility model belongs to the technical field of extruder detection, and in particular relates to a concentricity measuring device for an extruder. Background Art

[0002] A traditional extruder usually consists of a cylindrical extrusion barrel and one or more extrusion dies (a cylindrical extrusion barrel, a round extrusion rod, and an extrusion pad). The metal ingot (aluminum alloy cast bar) is subjected to directionally (radially) extrusion by the extrusion rod in the extrusion barrel and is formed into a product through the hole (cavity) of the extrusion die.

[0003] At present, when replacing the extrusion barrel, replacing the extrusion rod or performing regular inspections, it is necessary to detect the coaxiality between the extrusion rod and the extrusion barrel. When detecting the coaxiality, basic calibration is required first by visual inspection, and then the extrusion rod needs to be extended to different parts of the extrusion barrel for multi-point detection. The more detection points there are, the higher the coaxiality will be after adjustment. However, the distance between the end of the extrusion rod after it is extended into the extrusion barrel and the inner wall of the extrusion barrel cannot be measured. Since the temperature inside the extrusion barrel is too high, it is not realistic to place an electronic device at the end of the extrusion rod. Therefore, a device for measuring coaxiality is needed for precise measurement. Utility Model Content

[0004] In order to solve the above technical problems, the utility model further proposes a concentricity measuring device for an extruder.

[0005] A concentricity measuring device for an extruder comprises: a core measuring jig, which is coaxially installed at the end of an extrusion rod, and the core measuring jig comprises: a measuring shaft, a first measuring disk is coaxially arranged at the end of the measuring shaft, at least four U-shaped grooves are arranged in a circular array on the first measuring disk, and a measuring unit is detachably installed in the U-shaped groove for detecting the distance from the edge of the first measuring disk to the inner wall of the extrusion cylinder.

[0006] Furthermore, the measuring unit includes: a shell, the shell is installed in the U-shaped groove, a measuring column is slidably arranged in the shell, the end of the measuring column is placed outside the shell, a measuring rack is arranged at the lower end of the measuring column, a polyhedron roller is rotatably arranged in the shell, an intermittent driving mechanism is installed on the polyhedron roller, the measuring rack is adjacent to the intermittent driving mechanism through a gear set, an observation window is opened on the shell, and a reflective digital bar is arranged on each surface of the polyhedron roller.

[0007] Furthermore, the gear set includes: a first gear, the first gear is meshed with the measuring rack, the first gear is meshed with the second gear, the second gear is connected to the third gear through a chain, and the third gear is connected to the intermittent driving mechanism.

[0008] Furthermore, the intermittent drive mechanism includes: an intermittent drive gear, a positioning plate is coaxially arranged on the intermittent drive gear, a driving column is eccentrically arranged on the intermittent drive gear, a driven plate is coaxially arranged on the polyhedral roller, a plurality of driving grooves are circumferentially arranged on the driven plate, and a limiting arc surface is arranged between adjacent driving grooves, the limiting arc surface cooperates with the positioning plate to realize the positioning of the polyhedral roller, the driving column cooperates with the driving groove to realize driving the driven plate to rotate, and a motion groove is arranged on the edge of the positioning plate to provide space for the movement of the driving groove.

[0009] Furthermore, a roller is provided at the end of the measuring column.

[0010] Furthermore, it also includes a second measuring disk, which is installed on the mold. A tip is set at the end of the measuring shaft, and a cross coordinate line is set at the center of the second measuring disk. The tip and the cross coordinate line are matched to measure the coaxiality of the extrusion rod and the mold base.

[0011] Furthermore, the second measuring disk also includes: a disk body, a connecting protrusion is provided on one end surface of the disk body, the connecting protrusion is inserted into the center hole of the mold base, a measuring groove is provided at the center position of the other end surface of the disk body, a measuring block is detachably provided in the measuring groove, and cross coordinate lines are respectively provided on the measuring block and the disk body for limiting the installation position of the measuring block.

[0012] Furthermore, the side wall of the measuring block is provided with a first spring sheet for cooperating and connecting with the measuring groove.

[0013] Furthermore, the measuring unit is provided with a mounting protrusion, the first measuring disk is provided with an L-shaped limiting track, the mounting protrusion is cooperatively connected with the limiting track, and the mounting protrusion is provided with a second spring sheet for limiting the installation position of the mounting protrusion.

[0014] Furthermore, a driving unit for driving the measuring axis is provided on the measuring axis.

[0015] Beneficial effects:

[0016] The present application is provided with a core measuring jig, and the measuring axis of the core measuring jig is coaxially installed on the end of the extrusion rod and can be extended, so that when the end of the extrusion rod is placed in the middle of the extrusion cylinder, the measuring axis can extend out of the extrusion cylinder, thereby facilitating measurement. At the same time, a first measuring disk is provided, and the first measuring disk can reduce the distance to the side wall of the extrusion cylinder to facilitate the detection of the actual distance.

[0017] The present application can realize distance measurement and display in the environment of the extrusion cylinder by setting up a measuring unit, thereby solving the problem that electronic devices cannot measure in a high-temperature environment, and further reducing the length of the measuring axis and further reducing errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation position of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the measuring unit of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the core measuring fixture of the utility model;

[0021] Figure 4 For this utility model Figure 3 A partial enlarged view of middle A;

[0022] Figure 5 This is a schematic diagram of the installation position of the second spring piece of the utility model;

[0023] Figure 6 This is a schematic diagram of the installation position of the measuring block of the utility model;

[0024] Figure 7 This is a schematic diagram of the installation position of the first spring sheet of the utility model;

[0025] Description of the markings in the figure:

[0026] Core measuring fixture 1, measuring shaft 11, first measuring disk 12, U-shaped groove 13, measuring unit 14, shell 141, measuring column 142, measuring rack 143, gear set 144, intermittent driving mechanism 145, intermittent driving gear 1451, positioning disk 1452, driving column 1453, driven disk 1454, driving groove 1455, limiting arc surface 1456, moving groove 1457, observation window 146, reflective number strip 147, polyhedral roller 148, mounting protrusion 15, limiting rail 16, second spring piece 17, driving part 18, top 19, second measuring disk 2, cross coordinate line 21, disk body 22, connecting protrusion 23, measuring groove 24, measuring block 25, first spring piece 26. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0029] Embodiment 1, as Figure 1 - Figure 7 As shown, an extruder concentricity measuring device comprises: a core measuring jig 1, which is coaxially mounted on the end of an extrusion rod, and the core measuring jig 1 comprises: a measuring shaft 11, a first measuring disc 12 is coaxially arranged at the end of the measuring shaft 11, at least four U-shaped grooves 13 are arranged in a circumferential array on the first measuring disc 12, and a measuring unit 14 is detachably installed in the U-shaped groove 13, which is used to detect the distance from the edge of the first measuring disc 12 to the inner wall of the extrusion cylinder. The measuring shaft 11 is provided with a driving part 18 for driving the measuring shaft 11.

[0030] The measuring shaft 11 is connected to the end of the extrusion rod through threads, and the first measuring disk 12 is integrally formed with the measuring shaft 11 or fixed by welding.

[0031] The present application is provided with a core measuring jig 1, and a measuring axis 11 of the core measuring jig 1 is coaxially installed at the end of the extrusion rod and can be extended, so that when the end of the extrusion rod is placed in the middle of the extrusion cylinder, the measuring axis 11 can extend out of the extrusion cylinder, thereby facilitating measurement. At the same time, a first measuring disk 12 is provided, and the first measuring disk 12 can reduce the distance from the side wall of the extrusion cylinder to facilitate the detection of the actual distance.

[0032] The present application can realize distance measurement and display in the environment of the extrusion cylinder by setting up the measuring unit 14, which solves the problem that electronic devices cannot measure in a high-temperature environment, and can further reduce the length of the measuring axis 11 and further reduce errors.

[0033] In the second embodiment, the measuring unit 14 comprises: a housing 141, the housing 141 is installed in the U-shaped groove 13, a measuring column 142 is slidably arranged in the housing 141, the end of the measuring column 142 is placed outside the housing 141, a measuring rack 143 is arranged at the lower end of the measuring column 142, a polyhedron roller 148 is rotatably arranged in the housing 141, an intermittent driving mechanism 145 is installed on the polyhedron roller 148, the measuring rack 143 is adjacent to the intermittent driving mechanism 145 through a gear set 144, an observation window 146 is opened on the housing 141, and a reflective number bar 147 is arranged on each surface of the polyhedron roller 148. A roller is arranged at the end of the measuring column 142 to reduce friction and protect the inner wall of the extrusion cylinder.

[0034] Among them, the size of the measuring column 142 is determined according to the distance between the extrusion rod and the extrusion cylinder. Usually, the distance between the extrusion rod and the side wall of the extrusion cylinder, that is, the radius difference, is 6 mm. The number of faces of the polyhedron roller 148 is also determined according to the distance between the extrusion rod and the side wall of the extrusion cylinder. When the radius is 6 mm, the number of faces is 12, that is, a 2-fold relationship. The position of the observation window 146 corresponds to the position of one side of the polyhedron roller 148, that is, the vertical side of the polyhedron roller 148 can be seen, and the reflective number strip 147 is high temperature resistant and has reflective properties.

[0035] In the present application, when the end of the extrusion rod passes through the entrance of the extrusion cylinder, the inside of the extrusion cylinder is relatively dark. A light source is inserted at the exit of the extrusion cylinder and readings can be made through the reflective digital bar 147. The measuring column 142 is squeezed times to drive the measuring rack 143 to move, and the intermittent drive mechanism 145 is controlled by the gear set 144 to rotate at a specific angle, that is, the measuring column 142 drops 1 mm, and the intermittent drive mechanism 145 controls the polyhedron roller 148 to rotate one face.

[0036] In the third embodiment, the gear set 144 includes: a first gear 1441 , the first gear 1441 is meshed with the measuring rack 143 , the first gear 1441 is meshed with the second gear 1442 , the second gear 1442 is connected to the third gear 1443 via a chain, and the third gear 1443 is connected to the intermittent driving mechanism 145 .

[0037] The transmission ratios of the first gear 1441 , the second gear 1442 , and the third gear 1443 are set according to actual conditions, that is, to meet the effect of the second embodiment.

[0038] In the fourth embodiment, the intermittent drive mechanism 145 comprises: an intermittent drive gear 1451, a positioning plate 1452 is coaxially arranged on the intermittent drive gear 1451, a driving column 1453 is eccentrically arranged on the intermittent drive gear 1451, a driven plate 1454 is coaxially arranged on the polyhedral roller 148, a plurality of driving grooves 1455 are circumferentially arranged on the driven plate 1454, and a limiting arc surface 1456 is arranged between adjacent driving grooves 1455, the limiting arc surface 1456 cooperates with the positioning plate 1452 to realize the positioning of the polyhedral roller 148, the driving column 1453 cooperates with the driving groove 1455 to realize driving the driven plate 1454 to rotate, and a motion groove 1457 is arranged on the edge of the positioning plate 1452 to provide space for the movement of the driving groove 1455. With such an arrangement, the intermittent drive gear 1451 rotates one circle to drive the driven plate 1454 to a certain angle, thereby switching the indication.

[0039] Embodiment 5 further includes a second measuring disk 2, which is installed on the mold. A tip 19 is provided at the end of the measuring shaft 11, and a cross coordinate line 21 is provided at the center of the second measuring disk 2. The tip 19 cooperates with the cross coordinate line 21 to measure the coaxiality of the extrusion rod and the mold seat, wherein the angle of the tip 19 is 40 degrees. After the tip 19 contacts the second measuring disk 2, the contact point and the center position of the cross coordinate line 21 are measured, and it is qualified when it is less than 1 mm.

[0040] In the sixth embodiment, the second measuring disk 2 further comprises: a disk body 22, wherein a connecting protrusion 23 is provided on one end surface of the disk body 22, and the connecting protrusion 23 is inserted into the center hole of the mold seat, and a measuring groove 24 is provided at the center position of the other end surface of the disk body 22, and a measuring block 25 is detachably provided in the measuring groove 24, and a cross coordinate line 21 is provided on the measuring block 25 and the disk body 22, respectively, for defining the installation position of the measuring block 25. A first spring sheet 26 is provided on the side wall of the measuring block 25, for matching and connecting with the measuring groove 24.

[0041] The measuring block 25 may be made of aluminum, or other flexible metals or materials that can leave traces;

[0042] The present application provides a measuring block 25 which can be replaced after the measurement is completed, thereby abandoning the setting of a large aluminum disk. At the same time, the cross coordinate line 21 on the measuring block 25 can be coordinated with the cross coordinate line 21 on the disk body 22 for positioning and adjustment. At the same time, a first spring sheet 26 is provided to facilitate installation and disassembly.

[0043] In the seventh embodiment, a mounting protrusion 15 is provided on the measuring unit 14, and an L-shaped limiting track 16 is provided on the first measuring disk 12. The mounting protrusion 15 is cooperatively connected with the limiting track 16, and a second spring sheet 17 is provided on the mounting protrusion 15 for limiting the installation position of the mounting protrusion 15. Such a configuration facilitates the installation and disassembly of the measuring unit 14, and facilitates replacement and maintenance.

[0044] Working process:

[0045] First, the staff adjusts the extrusion cylinder so that the measuring extrusion rod is initially coaxial with the extrusion cylinder, and places the core measuring fixture 1 at the entrance of the extrusion cylinder. The operator emits a light source into the extrusion cylinder and reads the data on the reflective digital strip 147. When the data is greater than 1 mm, adjustment is made. Precise adjustment can be made through the specific distance difference. The extrusion rod is gradually extended, and real-time observation and adjustment are performed. When the top 19 contacts the measuring block 25, it stops moving. The tool measures that the distance from the point on the measuring block 25 to the center of the cross coordinate line 21 is less than 1 mm, which is qualified, and the coaxiality test is completed.

[0046] Extrusion cylinder entrance measurement: Place the first measuring disc 12 at the extrusion cylinder entrance. At this time, the measuring column is compressed 142 times.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An extruder concentricity measuring device, characterized in that: include: A core measuring jig (1) is coaxially mounted on the end of an extrusion rod, and comprises: a measuring shaft (11), a first measuring disc (12) being coaxially arranged at the end of the measuring shaft (11), at least four U-shaped grooves (13) being arranged in a circumferential array on the first measuring disc (12), and a measuring unit (14) being detachably mounted in the U-shaped groove (13) for detecting the distance from the edge of the first measuring disc (12) to the inner wall of the extrusion cylinder.

2. The extruder concentricity measuring device according to claim 1, characterized in that: The measuring unit (14) comprises: a shell (141), the shell (141) is installed in the U-shaped groove (13), a measuring column (142) is slidably arranged in the shell (141), the end of the measuring column (142) is placed outside the shell (141), a measuring rack (143) is arranged at the lower end of the measuring column (142), a polyhedron roller (148) is rotatably arranged in the shell (141), an intermittent driving mechanism (145) is installed on the polyhedron roller (148), the measuring rack (143) is adjacent to the intermittent driving mechanism (145) through a gear set (144), an observation window (146) is opened on the shell (141), and a reflective number bar (147) is arranged on each surface of the polyhedron roller (148).

3. The extruder concentricity measuring device according to claim 2, characterized in that: The gear set (144) includes: a first gear (1441), the first gear (1441) is meshed with a measuring rack (143), the first gear (1441) is meshed with a second gear (1442), the second gear (1442) is connected to a third gear (1443) via a chain, and the third gear (1443) is connected to the intermittent driving mechanism (145).

4. The extruder concentricity measuring device according to claim 3, characterized in that: The intermittent drive mechanism (145) comprises: an intermittent drive gear (1451), a positioning plate (1452) coaxially arranged on the intermittent drive gear (1451), a driving column (1453) eccentrically arranged on the intermittent drive gear (1451), a driven plate (1454) coaxially arranged on the polyhedral roller (148), a plurality of driving grooves (1455) circumferentially arranged on the driven plate (1454), a limiting arc surface (1456) is arranged between adjacent driving grooves (1455), the limiting arc surface (1456) cooperates with the positioning plate (1452) to realize the positioning of the polyhedral roller (148), the driving column (1453) cooperates with the driving groove (1455) to realize driving the driven plate (1454) to rotate, and a movement groove (1457) is arranged on the edge of the positioning plate (1452) to provide space for the movement of the driving groove (1455).

5. The extruder concentricity measuring device according to claim 2, characterized in that: A roller is provided at the end of the measuring column (142).

6. The extruder concentricity measuring device according to claim 1, characterized in that: The invention also comprises a second measuring disc (2), wherein the second measuring disc (2) is mounted on the mould, a tip (19) is arranged at the end of the measuring shaft (11), a cross coordinate line (21) is arranged at the centre of the second measuring disc (2), and the tip (19) cooperates with the cross coordinate line (21) to measure the coaxiality between the extrusion rod and the mould seat.

7. The extruder concentricity measuring device according to claim 6, characterized in that: The second measuring disk (2) further comprises: a disk body (22), one end surface of the disk body (22) being provided with a connecting protrusion (23), the connecting protrusion (23) being inserted into the center hole of the mold base, a measuring groove (24) being provided at the center position of the other end surface of the disk body (22), a measuring block (25) being detachably provided in the measuring groove (24), and a cross coordinate line (21) being provided on the measuring block (25) and the disk body (22) respectively for defining the installation position of the measuring block (25).

8. The extruder concentricity measuring device according to claim 7, characterized in that: The side wall of the measuring block (25) is provided with a first spring sheet (26) for being matched and connected with the measuring groove (24).

9. The extruder concentricity measuring device according to claim 1, characterized in that: The measuring unit (14) is provided with a mounting protrusion (15), the first measuring disk (12) is provided with an L-shaped limiting track (16), the mounting protrusion (15) is cooperatively connected with the limiting track (16), and the mounting protrusion (15) is provided with a second spring sheet (17) for limiting the installation position of the mounting protrusion (15).

10. The extruder concentricity measuring device according to claim 1, characterized in that: The measuring shaft (11) is provided with a driving unit (18) for driving the measuring shaft (11).

Images