Circular ring heavy workpiece centering mechanism and heavy coil demolding machine

Abstract

The invention provides an annular heavy workpiece centering mechanism and a heavy coil demolding machine, the centering mechanism comprises a crane, a rack, a group of floating seats fixedly arranged on the rack and a group of pushing columns installed on the rack through a displacement mechanism, the crane is located above the rack, and the group of floating seats and the group of pushing columns are annularly and uniformly distributed around the same central axis; the floating seat is provided with an elastic floating plate capable of horizontally moving in any horizontal direction, a side pull head is arranged at the top of the pushing column, and the displacement mechanism is used for driving the pushing column to ascend, descend and horizontally move in the radial direction. According to the circular ring heavy workpiece centering mechanism, the die coil placed on the floating seat is pulled through the side pull head, then the die coil is jacked and placed once to enable the elastic floating plate to be reset, the centering and positioning process is rapid and safe, and damage to the workpiece is avoided; according to the heavy coil demolding machine, the coil with the mold is positioned through the method, then demolding operation is carried out, and the coil can be fully protected against damage.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting magnet coil assembly, in particular to a circular heavy workpiece centering mechanism and a heavy coil demoulding machine. Background Art

[0002] Large superconducting coils are an important part of super-strong magnets. During production, large superconducting coils are wound on annular skeletons and solidified with epoxy resin. After the structural shape is stabilized, the annular skeleton is removed. The finished coil has a strong adhesion to the contact surface of the skeleton. The demoulding thrust required for the skeleton to be demoulded is about 30,000 kg, and the thrust needs to be evenly and symmetrically distributed on the force-bearing surface of the coil. In order to facilitate transportation and protection, a pair of flange covers will be used to lock and protect the upper and lower sides of the annular skeleton. When demoulding the coil, the coil needs to be removed from the flange and the annular skeleton is removed. However, the coil of the magnet is very heavy, and the coil alone weighs 800 kg. If the magnetic field strength and field range are expanded, the weight of the coil will be further increased, and the coil is easily deformed during the demoulding process. Therefore, how to remove the coil intact and quickly is a problem. In the process of removing the coil, the first thing to face is how to center and align the center. If the centering cannot be successfully achieved, deviations will occur during demoulding, resulting in uneven force and deformation of the coil. The traditional method of centering is to lift the coil with a mold by a crane and then push it manually for calibration. However, the total mass of the coil, flange and frame is very large, and it is inevitable that they will shake due to inertia when the load is moved. Therefore, manual centering is prone to failure. It is not only time-consuming and labor-intensive, but also easy to collide with the coil and damage the insulation layer during centering. Summary of the invention

[0003] In view of the defects of the background technology, the present invention proposes a heavy-duty workpiece centering mechanism for annular rings, which can quickly and safely center the coil with a mold. The present invention also proposes a heavy-duty coil demoulding machine, which can quickly and safely demould the coil with a mold.

[0004] The present invention proposes a circular heavy workpiece centering mechanism, comprising a crane, a frame, a group of floating seats fixed on the frame, and a group of push columns installed on the frame through a displacement mechanism, the crane is located above the frame, and the group of floating seats and the group of push columns are evenly distributed in a ring around the same central axis;

[0005] The floating seat is provided with an elastic floating plate which can be translated in any horizontal direction, the top of the push column is provided with a side pull head, and the displacement mechanism is used to drive the push column to rise and fall and translate radially;

[0006] The alignment steps include:

[0007] A. Place the workpiece flat on the elastic floating plate through the overhead crane, and the pull heads on each side are located in the workpiece circle;

[0008] B. Automatically align the workpiece using an elastic floating plate, then select the ejector pin that is closest to the inner wall of the workpiece, and drive the selected ejector pin to move radially outward until the workpiece is pulled by the side pulling head until its axis coincides with the central axis;

[0009] C. Drive all the push pins to synchronously lift the workpiece, and after the elastic floating plate is reset, drive all the push pins to synchronously descend and place the workpiece flat on the elastic floating plate again.

[0010] Preferably, the floating seat also includes an upper slide and a lower slide;

[0011] A horizontally extending upper linear guide is provided on the top of the upper slide, and the elastic floating plate is slidably mounted on the upper linear guide. A horizontally extending lower linear guide is provided on the top of the lower slide, and the upper slide is slidably mounted on the lower linear guide, and the extension direction of the upper linear guide is perpendicular to that of the lower linear guide.

[0012] A pair of first sliding rods are extended from the elastic floating plate to both sides of the sliding direction, and a pair of upper limit plates with ear holes are fixedly provided on the upper slide, wherein one of the first sliding rods is inserted into the ear hole of one upper limit plate, and the other first sliding rod is inserted into the ear hole of the other upper limit plate, and a return spring is sleeved around the first sliding rod between the elastic floating plate and any upper limit plate;

[0013] A pair of second sliding rods extend from the upper sliding platform to both sides of the sliding direction, and a pair of lower limit plates with ear holes are fixed to the lower sliding platform, one of the second sliding rods is inserted into the ear hole of one lower limit plate, and the other second sliding rod is inserted into the ear hole of the other lower limit plate, and return springs are sleeved on the circumference of the second sliding rods between the upper sliding platform and any lower limit plate.

[0014] Preferably, the displacement mechanism comprises a pair of translation rails, a pair of vertical rails, a pulley, a first motor and a second motor;

[0015] The translation guide rail is fixedly arranged on the frame, the pulley is slidably arranged on the translation guide rail, and the push column is slidably arranged on the vertical guide rail;

[0016] The first motor is installed at the bottom of the pulley and is transmission-connected to the bottom of the push column through a telescopic rod;

[0017] The second motor is located at one end of the translation guide rail and is transmission-connected to the pulley through a lead screw.

[0018] Preferably, the overhead crane comprises a support shaft, a hanging plate and a turntable, a hanging ring is provided on the top of the support shaft, a middle part of the hanging plate is fixedly connected to the support shaft, and a middle part of the turntable is rotatably connected to the support shaft;

[0019] N horizontally extending track arms are evenly arranged around the circumference of the hanging plate, and a hanging arm is slidably arranged on each track arm;

[0020] The turntable is evenly distributed with n eccentric shafts, and each eccentric shaft is connected to a corresponding boom through a connecting rod;

[0021] The turntable is also provided with a lever for driving the turntable to rotate.

[0022] The present invention also provides a heavy-duty coil demoulding machine, which uses the annular heavy-duty workpiece centering mechanism described in any one of the above items to demould and position the molded coil;

[0023] The molded coil comprises an upper flange, a lower flange, an annular frame and a coil. The coil is sleeved on the outer peripheral side of the annular frame. The annular frame is clamped and fixed between the upper flange and the lower flange. A circle of support is arranged on the inner peripheral side of the annular frame.

[0024] The frame is also provided with a group of brackets evenly distributed in a ring shape around the central axis, the brackets are mounted on bracket tracks extending radially, and the push columns extend tongue plates to the side away from the central axis;

[0025] The demoulding steps include:

[0026] a. De-mould and position the molded coil through the heavy-duty workpiece centering mechanism of the circular ring;

[0027] b. The push column rises synchronously to push out the upper flange;

[0028] c. Adjust the tongue plates of each push column to the bottom of the support platform, then simultaneously raise each push column to lift the annular frame and coil, and remove the lower flange;

[0029] d. Adjust each support to the bottom of the coil, and simultaneously lower each push column until the support supports the coil and the annular frame;

[0030] e. Adjust each tongue plate to the top of the support, and then press down the support to separate the annular frame from the coil;

[0031] f. Use overhead crane to transport the demoulding coil away.

[0032] Preferably, the heavy-duty coil demoulding machine further comprises a locking mechanism, which comprises a bottom slide rail, a slide seat, a connecting column and a lower locking tongue;

[0033] The bottom slide rail extends radially along the coil with the mold, and the slide seat is slidably arranged on the bottom slide rail;

[0034] One end of the sliding seat close to the central axis is fixedly connected to the connecting column, and the other end is provided with a handle;

[0035] The lower locking tongue is fixedly connected to a side of the connecting column which faces away from the central axis.

[0036] Preferably, the locking mechanism also includes an upper locking tongue, a top slide rail is provided at the top end of the connecting column, the upper locking tongue is slidably arranged on the top slide rail with its back facing the central axis, and a push-pull rod is provided at the back of the upper slide rail.

[0037] Preferably, the bracket includes at least two arc-shaped support plates arranged at intervals.

[0038] The beneficial effects of the present invention include: the circular heavy workpiece centering mechanism pulls the workpiece placed on the floating seat through the side pulling head, and then lifts the workpiece and resets it once to reset the elastic floating plate. The centering and positioning process is fast and safe, and damage to the workpiece is avoided; the heavy coil demolding machine first positions the molded coil through the above method, and then performs the demolding operation, which can fully protect the coil from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0040] Figure 1 It is a three-dimensional structural diagram of the circular ring heavy workpiece centering mechanism of the present invention.

[0041] Figure 2 It is a three-dimensional structural diagram of the floating seat of the present invention.

[0042] Figure 3 It is a three-dimensional structural diagram of the push column and the displacement mechanism of the present invention from a radially outer side perspective.

[0043] Figure 4 It is a three-dimensional structural diagram of the push column and the displacement mechanism of the present invention from a radial inner side perspective.

[0044] Figure 5 It is a three-dimensional structural diagram of the overhead crane of the present invention.

[0045] Figure 6 It is a three-dimensional structural diagram of the heavy-duty coil demoulding machine of the present invention.

[0046] Figure 7 It is a cross-sectional view of a molded coil.

[0047] Figure 8 It is a side view of the locking mechanism of the present invention.

[0048] Fig. 9 It is a three-dimensional structural diagram of the bracket of the present invention.

[0049] Reference numerals:

[0050] 1- overhead crane, 11- fulcrum, 12- hanging plate, 13- turntable, 14- lifting ring, 15- track arm, 16- hanging arm, 17- eccentric shaft, 18- connecting rod, 19- lever, 2- frame, 21- workbench, 3- floating seat, 31- elastic floating plate, 311- return spring, 32- upper slide, 33- lower slide, 34- upper linear guide, 35- lower linear guide, 36- first slide, 37- upper limit plate, 38- second slide, 39- lower limit plate, 4- push column, 41- side pull head, 4 2-tongue plate, 51-translational guide rail, 52-vertical guide rail, 53-pulley, 54-first motor, 55-second motor, 6-coil with mold, 61-upper flange, 62-lower flange, 63-annular frame, 64-coil, 65-support platform, 7-locking mechanism, 71-bottom slide rail, 72-slide seat, 73-connecting column, 74-upper lock tongue, 75-lower lock tongue, 76-top slide rail, 77-push-pull rod, 78-handle, 8-bracket, 81-bracket track, 82-bracket motor, 83-arc bracket. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0053] The principle of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0054] The present invention proposes a ring heavy workpiece centering mechanism, such as Figure 1 As shown, the centering mechanism includes a crane 1, a frame 2, a floating seat 3 fixed on the frame 2, and a push column 4 installed on the frame 2 through a displacement mechanism. The crane 1 is located above the frame 2, and the floating seat 3 and the push column 4 are evenly distributed in a ring around the same central axis. The floating seat 3 is provided with an elastic floating plate 31 that can be translated in any horizontal direction, and the top of the push column 4 is provided with a side pull head 41. The displacement mechanism is used to drive the push column 4 to rise and fall and translate radially.

[0055] The ring heavy workpiece centering mechanism pulls the workpiece placed on the floating seat 3 through the side puller 41, and then lifts the workpiece to reset it once to reset the elastic floating plate 31. The centering and positioning process is fast and safe, and damage to the workpiece can be avoided. Figure 1 As shown, the frame 2 is provided with a workbench 21, four push columns 4 are arranged in a circle at 90° intervals, and four floating seats 3 are also arranged in a circle at 90° intervals. In the initial position, the push columns 4 are in the inner circle and the floating seats 3 are in the outer circle. The centering steps include:

[0056] A. Place the workpiece flat on the elastic floating plate 31 by means of the overhead crane 1. At this time, the push column 4 is in the initial position, and the side pull heads 41 are located in the workpiece circle;

[0057] B. Automatically align the workpiece by using the elastic floating plate 31, and then select the push pin 4 closest to the inner wall of the workpiece by the side pulling head 41, and drive the selected push pin 4 to move radially outward until the side pulling head 41 pulls the workpiece until its axis coincides with the central axis;

[0058] C. Drive all the push pins 4 to synchronously lift the workpiece, and after the elastic floating plate 31 is reset, drive all the push pins 4 to synchronously descend, and place the workpiece flat on the elastic floating plate 31 again.

[0059] When the crane hoists the workpiece onto the elastic floating plate 31 for the first time, the deviation is within the control range. If a single side pull head 41 cannot be centered due to the offset direction, the pulling direction of the workpiece can be fine-tuned through the cooperation of other side pull heads 41. When the workpiece is placed flat on the elastic floating plate 31 for the second time, the elastic floating plate 31 has eliminated the elastic force generated by the displacement, so the side pull head 41 can be released, and the workpiece has been centered without lateral force.

[0060] like Figure 2 In the illustrated embodiment, in addition to the elastic floating plate 31, the floating seat 3 also includes an upper slide 32 and a lower slide 33. The lower slide 33 is fixedly mounted on the workbench 21, a horizontally extending upper linear guide 34 is provided on the top of the upper slide 32, the elastic floating plate 31 is slidably mounted on the upper linear guide 34, a horizontally extending lower linear guide 35 is provided on the top of the lower slide 33, the upper slide 32 is slidably mounted on the lower linear guide 35, and the upper linear guide 34 and the lower linear guide 35 extend in a direction perpendicular to each other;

[0061] A pair of first slide bars 36 are extended from the elastic floating plate 31 to both sides of the sliding direction, and a pair of upper limit plates 37 with ear holes are fixedly provided on the upper slide 32, wherein one of the first slide bars 36 is inserted into the ear hole of one upper limit plate 37, and the other first slide bar 36 is inserted into the ear hole of the other upper limit plate 37, and a return spring 311 is sleeved around the first slide bar 36 between the elastic floating plate 31 and any upper limit plate 37;

[0062] A pair of second slide bars 38 extend from the upper slide 32 on both sides of the sliding direction, and a pair of lower limit plates 39 with ear holes are fixed to the lower slide 33, wherein one of the second slide bars 38 is inserted into the ear hole of one lower limit plate 39, and the other second slide bar 38 is inserted into the ear hole of the other lower limit plate 39, and a return spring 311 is sleeved on the circumference of the second slide bar 38 between the upper slide 32 and any lower limit plate 39.

[0063] Two return springs 311 are provided on each side of the movement direction of the elastic floating plate 31 and the upper slide 32. If the mass of the workpiece increases, more springs can be provided to increase the elastic force. The spring with large elastic force can use the elastic force to actively center the workpiece when it is placed for the first time. As the spring deformation decreases, the workpiece with extremely large weight cannot achieve perfect centering and centering, so the side pull head 41 is required to pull the workpiece for assistance. The elastic floating plate 31 can reduce the stroke of the side pull head 41 pulling the workpiece, further reducing the risk of damage to the workpiece caused by pulling.

[0064] For ease of control, Figure 3-4 In the illustrated embodiment, each push column is individually equipped with a displacement system. The displacement mechanism includes a pair of translation rails 51, a pair of vertical rails 52, a pulley 53, a first motor 54 and a second motor 55. The first motor 54 is used to drive the push column 4 to rise and fall, and the second motor 55 is used to drive the push column 4 to translate. The translation rail 51 is fixedly set on the frame 2, the pulley 53 is slidably set on the translation rail 51, and the push column 4 is slidably set on the vertical rail 52; the first motor 54 is installed at the bottom of the pulley 53 and is connected to the bottom of the push column 4 through a telescopic rod. The second motor 55 is located at one end of the translation rail 51 and is connected to the pulley 53 through a lead screw.

[0065] like Figure 5 In the embodiment shown, the traveling crane 1 comprises a support shaft 11, a hanging plate 12 and a turntable 13. A hanging ring 14 is provided on the top of the support shaft 11. The hanging ring 14 is used to hang the overhead crane in the air. The middle part of the hanging plate 12 is fixedly connected to the support shaft 11, and the middle part of the turntable 13 is rotatably connected to the support shaft 11. Four horizontally extending track arms 15 are evenly arranged on the circumference of the hanging plate 12. The track arms 15 extend outward in a cross shape at an angle of 90°. A hanging arm 16 is slidably arranged on each track arm 15. Four eccentric shafts 17 are evenly arranged on the turntable 13. Each eccentric shaft 17 is connected to a corresponding hanging arm 16 through a connecting rod 18. A hanging plate is provided at the bottom of the hanging arm 16. The turntable 13 is also provided with a lever 19 for driving the turntable 13 to rotate. When operating, the lever 19 is pushed clockwise by hand, and the four hanging arms 16 expand outward synchronously. When the lever 19 is pushed counterclockwise, the four hanging arms 16 retract synchronously. The lifting radius of the overhead crane 1 can be changed by means of the turntable 13 and the movable lifting arm 16, so as to facilitate the grabbing of workpieces.

[0066] The present invention also proposes a Figure 6 The heavy-duty coil demoulding machine shown is used for demoulding the molded coil 6. It adopts the annular heavy-duty workpiece centering mechanism recorded in any of the above embodiments to perform demoulding and positioning on the molded coil 6.

[0067] like Figure 7 As shown, the molded coil 6 includes an upper flange 61, a lower flange 62, an annular frame 63 and a coil 64. The coil 64 is sleeved on the outer peripheral side of the annular frame 63. The annular frame 63 is clamped and fixed between the upper flange 61 and the lower flange 62. A circle of support 65 is provided on the inner peripheral side of the annular frame 63.

[0068] The heavy-duty coil demoulding machine comprises a crane 1, a frame 2, a floating seat 3 fixed on the frame 2, and a push column 4 installed on the frame 2 through a displacement mechanism. The crane 1 is located above the frame 2, and the floating seat 3 and the push column 4 are evenly distributed in a ring around the same central axis. The floating seat 3 is provided with an elastic floating plate 31 that can be translated in any horizontal direction, and the top of the push column 4 is provided with a side pull head 41. The displacement mechanism is used to drive the push column 4 to rise and fall and translate radially.

[0069] The frame 2 is also provided with a group of brackets 8 evenly distributed around the central axis in an annular shape, the brackets 8 are mounted on bracket rails 81 extending radially, and are driven by bracket motors 82 to move radially along the workbench 21. The ejector column 4 extends a tongue plate 42 to the side away from the central axis.

[0070] When demoulding, the molded coil 6 is first centered and positioned. The heavy-duty coil demoulding machine pulls the molded coil 6 placed on the floating seat 3 through the side puller 41, and then lifts and resets the molded coil 6 once to reset the elastic floating plate 31. The centering and positioning process is fast and safe, and can avoid damage to the coil 64. The frame 2 is provided with a disc-shaped workbench 21, and the four push pins 4 are arranged in a circle at 90° intervals, and the four floating seats 3 are also arranged in a circle at 90° intervals. In the initial position, the push pins 4 are in the inner circle and the floating seat 3 is in the outer circle. The centering steps include:

[0071] A. Place the mold coil 6 flat on the elastic floating plate 31 through the overhead crane 1. At this time, the push column 4 is in the initial position, and the side pull heads 41 are located in the inner ring of the mold coil 6;

[0072] B. Automatically align the center using the elastic floating plate 31, then select the push pin 4 whose side pull head 41 is closest to the inner wall of the mold coil 6, and drive the selected push pin 4 to move radially outward until the side pull head 41 pulls the mold coil 6 until its axis coincides with the central axis;

[0073] C. Drive all the push pins 4 to synchronously lift the molded coil 6, and after the elastic floating plate 31 is reset, drive all the push pins 4 to synchronously descend, and place the molded coil 6 flat on the elastic floating plate 31 again.

[0074] When the overhead crane 1 first hoists the mold coil 6 onto the elastic floating plate 31, the deviation is within the control range. If the single side pull head 41 cannot be centered due to the offset direction, the pulling direction of the mold coil 6 can be fine-tuned through the cooperation of other side pull heads 41. When the mold coil 6 is placed flat on the elastic floating plate 31 for the second time, the elastic floating plate 31 has eliminated the elastic force generated by the displacement, so the side pull head 41 can be released, and the mold coil 6 has been centered without lateral force.

[0075] In this embodiment, in addition to the elastic floating plate 31, the floating seat 3 also includes an upper slide 32 and a lower slide 33. The lower slide 33 is fixedly mounted on the workbench 21, and a horizontally extending upper linear guide 34 is provided on the top of the upper slide 32. The elastic floating plate 31 is slidably mounted on the upper linear guide 34. A horizontally extending lower linear guide 35 is provided on the top of the lower slide 33. The upper slide 32 is slidably mounted on the lower linear guide 35. The extension direction of the upper linear guide 34 is perpendicular to that of the lower linear guide 35.

[0076] A pair of first slide bars 36 are extended from the elastic floating plate 31 to both sides of the sliding direction, and a pair of upper limit plates 37 with ear holes are fixedly provided on the upper slide 32, wherein one of the first slide bars 36 is inserted into the ear hole of one upper limit plate 37, and the other first slide bar 36 is inserted into the ear hole of the other upper limit plate 37, and a return spring 311 is sleeved around the first slide bar 36 between the elastic floating plate 31 and any upper limit plate 37;

[0077] A pair of second slide bars 38 extend from the upper slide 32 on both sides of the sliding direction, and a pair of lower limit plates 39 with ear holes are fixed to the lower slide 33, wherein one of the second slide bars 38 is inserted into the ear hole of one lower limit plate 39, and the other second slide bar 38 is inserted into the ear hole of the other lower limit plate 39, and a return spring 311 is sleeved on the circumference of the second slide bar 38 between the upper slide 32 and any lower limit plate 39.

[0078] There are two upper linear guides 34 and lower linear guides 35, and two return springs 311 are provided on each side of the movement direction of the elastic floating plate 31 and the upper slide 32. If the mass of the molded coil 6 increases, more guides and springs can be provided to increase the bearing capacity and elastic force. The spring with large elastic force can use the elastic force to actively center the molded coil 6 when it is placed for the first time. As the spring deformation decreases, the extremely heavy molded coil 6 cannot achieve perfect centering and alignment, so the side pull head 41 is required to pull the molded coil 6 for assistance. The elastic floating plate 31 can reduce the travel of the side pull head 41 pulling the molded coil 6, further reducing the risk of damage to the molded coil 6 caused by pulling.

[0079] For ease of control, each push column 4 is individually equipped with a displacement system. The displacement mechanism includes a pair of translation rails 51, a pair of vertical guide rails 52, a pulley 53, a first motor 54 and a second motor 55. The second motor 55 is located at one end of the translation rail 51 and is connected to the pulley 53 through a lead screw. The function of the first motor 54 is to drive the push column 4 to rise and fall, and the function of the second motor 55 is to drive the push column 4 to translate. The translation rail 51 is fixedly set on the frame 2, the pulley 53 is slidably set on the translation rail 51, and the push column 4 is slidably set on the vertical guide rail 52; the first motor 54 is installed at the bottom of the pulley 53 and is connected to the bottom of the push column 4 through a telescopic rod.

[0080] In this embodiment, the overhead crane 1 includes a support shaft 11, a hanging plate 12 and a turntable 13. A hanging ring 14 is provided on the top of the support shaft 11. The hanging ring 14 is used to hang the overhead crane in the air. The middle part of the hanging plate 12 is fixedly connected to the support shaft 11, and the middle part of the turntable 13 is rotatably connected to the support shaft 11. Four horizontally extending track arms 15 are evenly arranged on the circumference of the hanging plate 12. The track arms 15 extend outward in a cross shape at an angle of 90°. A hanging arm 16 is slidably arranged on each track arm 15. Four eccentric shafts 17 are evenly arranged on the turntable 13. Each eccentric shaft 17 is connected to a corresponding hanging arm 16 through a connecting rod 18. A hanging plate is provided at the bottom of the hanging arm 16. The turntable 13 is also provided with a lever 19 for driving the turntable 13 to rotate. When operating, the lever 19 is pushed clockwise by hand, and the four hanging arms 16 expand outward synchronously. When the lever 19 is pushed counterclockwise, the four hanging arms 16 retract synchronously. The lifting radius of the overhead crane 1 can be changed by means of the turntable 13 and the movable lifting arm 16, so as to facilitate the grabbing of the molded coil 6.

[0081] After the centering is completed, the outer mold is removed and the coil 64 is taken out. The demoulding steps include:

[0082] a. Demolding and positioning the molded coil 6 through the heavy-duty workpiece centering mechanism of the circular ring;

[0083] b. The ejector column rises synchronously to eject the upper flange 61;

[0084] c. Adjust the tongue plate 42 of each push column 4 to the bottom of the support platform 63, then simultaneously raise each push column 4 to lift the annular frame 63 and the coil 64, and remove the lower flange 62;

[0085] d. Adjust each support 65 to the bottom of the coil 64, and simultaneously lower each push column 4 until the support 65 supports the coil 64 and the annular frame 63;

[0086] e. Adjust each tongue plate 42 to the top of the support 65, and then press down the support 65 to separate the annular frame 63 from the coil 64;

[0087] f. The demoulding coil 64 is transported away by the overhead crane 1.

[0088] like Figure 8 In the illustrated embodiment, the heavy-duty coil demoulding machine further comprises a locking mechanism 7 , which comprises a bottom slide rail 71 , a slide seat 72 , a connecting column 73 , an upper locking tongue 74 and a lower locking tongue 75 .

[0089] The bottom rail 71 extends radially along the mold coil 6, and the slide 72 is slidably arranged on the bottom rail 71; one end of the slide 72 close to the central axis is fixedly connected to the connecting column 73, and the other end is provided with a handle 78; the lower locking tongue 75 is fixedly connected to the side of the connecting column 73 facing away from the central axis. The initial positions of the connecting column 73, the upper locking tongue 74 and the lower locking tongue 75 are all located in the inner ring of the mold coil 6. After the centering positioning is completed, the handle is pulled outward, and the slide 72 moves radially outward along the workbench 21. The bottom of the lower locking tongue 75 is provided with a step. After the lower locking tongue 75 moves outward and is in place, the step can be used to clamp the side wall and top of the inner ring of the lower flange 62 to avoid displacement during demolding.

[0090] A top slide rail 76 is provided at the top of the connecting column 73, and an upper locking tongue 74 is slidably arranged on the top slide rail 76 facing away from the central axis, and a push-pull rod 77 is provided on the back of the upper slide rail. The upper flange 61 and the lower flange 62 are fixed by multiple bolts. In order to avoid displacement between the frame and the lower flange 62 when the bolts are removed, after the lower locking tongue 75 locks the lower flange 62, the push-pull rod 77 can be pulled outward, and the top of the support platform 65 can be pressed by the upper locking tongue 74. After the upper flange 61 is removed and transported away by the overhead crane 1, the push-pull rod 77 is pushed back, and the operation of step c is performed.

[0091] like Fig. 9 In the illustrated embodiment, the bracket 8 includes three arc-shaped support plates 83 that are spaced apart from each other, so that the force-bearing area between the bracket 8 and the coil 64 can be increased to avoid damage to the coil 64 when it is separated from the annular frame 63 .

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring heavy workpiece centering mechanism, characterized in that: It comprises a traveling crane, a frame, a group of floating seats fixed on the frame and a group of pushing columns installed on the frame through a displacement mechanism, the traveling crane is located above the frame, and the group of floating seats and the group of pushing columns are evenly distributed in a ring around the same central axis; The floating seat is provided with an elastic floating plate that can be translated in any horizontal direction, the top of the push column is provided with a side pull head, and the displacement mechanism is used to drive the push column to rise and fall and translate radially; The alignment steps include: A. Place the workpiece flat on the elastic floating plate through the overhead crane, and the pull heads on each side are located in the workpiece circle; B. Automatically align the workpiece using an elastic floating plate, then select the ejector pin that is closest to the inner wall of the workpiece, and drive the selected ejector pin to move radially outward until the workpiece is pulled by the side pulling head until its axis coincides with the central axis; C. Drive all the push pins to synchronously lift the workpiece, and after the elastic floating plate is reset, drive all the push pins to synchronously descend and place the workpiece flat on the elastic floating plate again.

2. The ring heavy workpiece centering mechanism according to claim 1, characterized in that: The floating seat also includes an upper slide and a lower slide; A horizontally extending upper linear guide is provided on the top of the upper slide, the elastic floating plate is slidably mounted on the upper linear guide, a horizontally extending lower linear guide is provided on the top of the lower slide, the upper slide is slidably mounted on the lower linear guide, and the upper linear guide is perpendicular to the extension direction of the lower linear guide; The elastic floating plate extends a pair of first sliding rods on both sides of the sliding direction, and the upper slide is fixed with a pair of upper limit plates with ear holes, one of the first sliding rods is inserted into the ear hole of one upper limit plate, and the other first sliding rod is inserted into the ear hole of the other upper limit plate, and the periphery of the first sliding rod between the elastic floating plate and any upper limit plate is sleeved with a return spring; The upper slide table extends a pair of second sliding rods on both sides of the sliding direction, and the lower slide table is fixed with a pair of lower limit plates with ear holes, one of the second sliding rods is inserted into the ear hole of one lower limit plate, and the other second sliding rod is inserted into the ear hole of the other lower limit plate, and the surrounding sides of the second sliding rods between the upper slide table and any lower limit plate are sleeved with return springs.

3. The ring heavy workpiece centering mechanism according to claim 1, characterized in that: The displacement mechanism includes a pair of translation guide rails, a pair of vertical guide rails, a pulley, a first motor and a second motor; The translation guide rail is fixedly arranged on the frame, the pulley is slidably arranged on the translation guide rail, and the push column is slidably arranged on the vertical guide rail; The first motor is installed at the bottom of the pulley and is transmission-connected to the bottom of the push column through a telescopic rod; The second motor is located at one end of the translation guide rail and is transmission-connected to the pulley via a lead screw.

4. The ring heavy workpiece centering mechanism according to claim 1, characterized in that: The overhead crane comprises a support shaft, a hanging plate and a rotating plate. A hanging ring is provided on the top of the support shaft, the middle part of the hanging plate is fixedly connected to the support shaft, and the middle part of the rotating plate is rotatably connected to the support shaft. The circumference of the suspension plate is evenly provided with n horizontally extending track arms, and a suspension arm is slidably provided on each track arm; The turntable is evenly provided with n eccentric shafts, and each eccentric shaft is connected to a corresponding boom through a connecting rod; The turntable is also provided with a lever for driving the turntable to rotate.

5. A heavy-duty coil demoulding machine, characterized in that: The workpiece is demoulded and positioned by using the heavy-duty workpiece centering mechanism of the circular ring described in any one of claims 1 to 4; The workpiece is a coil with a mold, and the coil with a mold includes an upper flange, a lower flange, an annular frame and a coil, the coil is sleeved on the outer peripheral side of the annular frame, the annular frame is clamped and fixed between the upper flange and the lower flange, and a circle of support is provided on the inner peripheral side of the annular frame; The frame is also provided with a group of brackets evenly distributed in an annular shape around the central axis, the brackets are mounted on bracket tracks extending radially, and the push columns extend tongue plates to a side away from the central axis; The demoulding steps include: a. De-mould and position the molded coil through the heavy-duty workpiece centering mechanism of the circular ring; b. The push column rises synchronously to push out the upper flange; c. Adjust the tongue plates of each push column to the bottom of the support platform, then simultaneously raise each push column to lift the annular frame and coil, and remove the lower flange; d. Adjust each support to the bottom of the coil, and simultaneously lower each push column until the support supports the coil and the annular frame; e. Adjust each tongue plate to the top of the support, and then press down the support to separate the annular frame from the coil; f. Use overhead crane to transport the demoulding coil away.

6. The heavy-duty coil demoulding machine according to claim 5, characterized in that: The heavy-duty coil demoulding machine also includes a locking mechanism, which includes a bottom slide rail, a slide seat, a connecting column and a lower locking tongue; The bottom slide rail extends radially along the coil with mold, and the slide seat is slidably arranged on the bottom slide rail; One end of the slide seat close to the central axis is fixedly connected to the connecting column, and the other end is provided with a handle; The lower locking tongue is fixedly connected to a side of the connecting column facing away from the central axis.

7. The heavy-duty coil demoulding machine according to claim 6, characterized in that: The locking mechanism also includes an upper locking tongue. A top slide rail is provided at the top end of the connecting column. The upper locking tongue is slidably arranged on the top slide rail with its back facing the central axis. A push-pull rod is provided at the back of the upper slide rail.

8. The heavy-duty coil demoulding machine according to claim 5, characterized in that: The bracket includes at least two arc-shaped supporting plates arranged at intervals.

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