Cylinder body automatic positioning device for 3D printing equipment

Abstract

The invention relates to the technical field of metal 3D printing, in particular to an automatic cylinder positioning device for 3D printing equipment, which comprises a rack, a movable carrier plate, a positioning mechanism and a locking unit. Primary positioning in the front-back direction is conducted through the front-back limiting plates, then primary positioning in the left-right direction is conducted through the pressing strips, and an alignment reference is provided for the follow-up positioning process; then the limiting rod gradually abuts against the inner wall of the through hole, the pressing rod located in the kidney-shaped groove captures and limits the cylinder body, the pressing rod located outside the kidney-shaped groove presses the cylinder body, in conclusion, the cylinder body is precisely positioned so that the cylinder body can be located over the lifting base, and finally a plurality of stable triangular frames are formed through the locking units; the stability of the rod body in the process of moving the rod body to the line subsequently is guaranteed, the problem that the position accuracy of the cylinder body becomes poor due to movement is avoided, automatic positioning and line feeding of the cylinder body are achieved, and the positioning and line feeding efficiency of the cylinder body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D printing, and in particular to an automatic cylinder positioning device for 3D printing equipment. Background Art

[0002] Powder molten metal additive manufacturing is an advanced 3D printing technology that is commonly used in aerospace, automotive, medical and mold manufacturing fields. Metal powder is laid layer by layer and selectively melted using a laser or electron beam as a heat source, so that the powder in the corresponding area fuses to form the desired solid part. The cylinder used in the powder molten metal additive manufacturing process is one of the core parts of the equipment, usually referred to as a build chamber or molding chamber, and the empty cylinder needs to be moved into the corresponding printing position before the operation.

[0003] At present, the hollow cylinder body of the 3D printing equipment is first transported by an existing external logistics AGV cart, and then manually put the empty cylinder body online to the printing area. It requires multiple manual operations with auxiliary tools to complete, which is a semi-automatic operation process. Secondly, because the 3D printing equipment has high precision requirements, and the logistics AGV cart cannot meet the precision requirements when transporting the cylinder body, it affects the efficiency of the overall printing process and the accuracy of the cylinder body online, which is prone to problems that affect subsequent printing effects. Summary of the invention

[0004] Based on this, it is necessary to provide a cylinder automatic positioning device for 3D printing equipment, aiming to solve the above-mentioned problems of the prior art.

[0005] The present application provides an automatic cylinder positioning device for 3D printing equipment, comprising: a frame, a U-shaped base plate is fixedly arranged on the upper end surface of the frame, a plurality of balls are rollingly arranged on the upper end surface of the base plate along the circumferential direction of the U-shaped region thereof, a movable carrier is placed on the upper end surface of the base plate, the movable carrier is driven by an external hydraulic cylinder to move left and right and is used to carry and move the cylinder body.

[0006] The frame is provided with a positioning mechanism for limiting the cylinder body, and the positioning mechanism includes an L-shaped frame, and the movable carrier is provided with an L-shaped frame. The upper end surface of the horizontal section of the L-shaped frame is provided with a lifting seat for sliding up and down through two left and right distributed connecting rods, and the front and rear sides of the lifting seat are provided with two left and right distributed limiting rods with vertical axes, and the left and right sides of the lifting seat are provided with two front and back distributed clamping strips, and the L-shaped frame is provided with a driving unit, and the driving unit includes a group moving toward each other and a delayed driving group. The lifting seat rises and drives the limiting rod to insert into the through hole at the corresponding position of the bottom of the cylinder body, and cooperates with each other through four limiting rods to form two locking triangles and center the cylinder body front and back, and the clamping strips on both sides clamp and center the cylinder body left and right.

[0007] A preliminary limiting unit is provided on the upper end surface of the base plate, and the preliminary limiting unit includes a longitudinal cylinder and a limiting plate for preliminary limiting. Two rows of longitudinal cylinders equidistantly arranged from left to right are fixedly provided on the upper end surface of the base plate, and an L-shaped limiting plate is fixedly provided at the telescopic end of the longitudinal cylinder, and the inner corner area of ​​the limiting plate faces downward, and the limiting plates distributed front and back are symmetrical front and back. A locking unit is provided on the L-shaped frame, and the locking unit includes a moving rod for locking a clamping strip and an extrusion plate for locking the limiting rod. After completing the positioning and guiding of the cylinder body, the state of the cylinder body is locked by the locking unit, and then the cylinder body is moved.

[0008] According to a favorable embodiment, the positioning mechanism includes a sliding block, and the front and rear end surfaces of the lifting seat are both provided with sliding blocks for sliding forward and backward through a connecting shaft, and the opposite back surfaces of the two sliding blocks are hingedly provided with two left-right symmetrical hinge bars, and all limit rods are fixedly provided on the upper end surfaces of the corresponding hinge bars, and a spring 1 is commonly fixedly provided between two adjacent hinge bars, and the angle between the two adjacent hinge bars in the initial state is maintained by the spring 1.

[0009] According to an advantageous embodiment, the diameter of the limiting rod is smaller than the diameter of the through hole at the bottom of the cylinder body.

[0010] According to a favorable embodiment, a placement groove is provided on the lifting seat front and back, the opposite moving group includes a rotating shaft, the lower end surface of the lifting seat is rotatably provided with a rotating shaft that penetrates into the placement groove, and the rotating shaft is located at the center of the lifting seat, a gear is fixedly sleeved on the rotating shaft, and two racks distributed left and right are slidably provided on the inner wall of the placement groove, and the two racks are symmetrical about the left and right center of the rotation shaft axis, the sliding blocks correspond to the racks one by one, and a horizontal rod extending from front to back along the axis is fixedly provided on the end surface of the sliding block facing the corresponding rack, the horizontal rod slides back and forth and penetrates the corresponding rack, and a spring 2 which is jointly fixedly sleeved on the horizontal rod is provided between the rack and the sliding block.

[0011] According to a favorable embodiment, the delay drive group includes a matching cylinder, the upper end surface of the L-shaped frame is fixedly provided with the matching cylinder, the inner wall of the matching cylinder is provided with a spiral groove, and a matching rod matching with the spiral groove is fixedly provided on the rotating shaft.

[0012] According to an advantageous embodiment, a vertical hysteresis groove is provided inside the mating cylinder, the hysteresis groove is located below the spiral groove and is connected to the spiral groove, and the mating rod is located in the hysteresis groove before mating with the spiral groove.

[0013] According to a favorable embodiment, the positioning mechanism also includes a mounting frame, and L-shaped mounting frames are fixedly provided on both left and right end surfaces of the lifting seat, and a mounting plate is fixedly provided on the upper end surface of the vertical section of the mounting frame, and the lower end surface of the clamping strip is hingedly provided on the corresponding mounting plate, and a plurality of clamping rods for positioning waist-shaped grooves on the left and right end surfaces of the cylinder body shell are provided on the clamping strip, and limit strips are fixedly provided on both left and right end surfaces of the mounting plate, and the corresponding two limit strips cooperate with each other to limit the rotation angle of the corresponding two clamping strips to always be within a set range.

[0014] According to a favorable embodiment, a plurality of clamping rods on the same clamping strip are arranged equidistantly along the length direction of the clamping strip, and the axial direction of the clamping rod is the same as the thickness direction of the clamping strip, a fixed circular plate is fixedly provided on the end face of the clamping rod away from the clamping strip, and a spring three is fixedly provided between the fixed circular plate and the clamping strip.

[0015] According to a favorable embodiment, the locking unit includes a moving rod, and the horizontal section of the L-shaped frame is provided with two moving rods with vertical axes and left-right symmetry, which slide up and down. The two moving rods are driven by an external hydraulic cylinder three to move up and down. A locking plate is fixedly provided between two adjacent clamping strips, and a locking groove is provided on the locking plate. The lower end of the inner wall of the locking groove and the upper end of the moving rod are both chamfered. A mounting circular plate is fixedly sleeved on the moving rod, and a pushing plate is provided above the moving rod. A spring four is fixedly provided between the pushing plate and the mounting circular plate.

[0016] According to a favorable embodiment, the locking unit also includes a circular strip, which is fixedly provided on the two moving rods, and two extrusion plates distributed front and back are fixedly provided on the circular strip, and the upper end of the extrusion plate is an isosceles trapezoid with a larger upper part and a smaller lower part. The extrusion plate squeezes the corresponding two hinged strips to lock the corresponding two limit rods.

[0017] In summary, the present invention includes at least one of the following beneficial effects: First, in the present invention, the initial positioning in the front-to-back direction is performed by the limit plate, and then the initial positioning in the left-to-right direction is performed by the clamping strip, so as to provide a positioning reference for the subsequent positioning process, and the limit rod is gradually pressed against the inner wall of the through hole, and the clamping rod located in the waist-shaped groove captures and limits the cylinder body, and the clamping rod located outside the waist-shaped groove clamps the cylinder body. In summary, the cylinder body is precisely positioned so that it is directly above the lifting seat, and finally a plurality of stable triangular frames are formed by the locking unit to ensure the stability of the cylinder body during the subsequent movement to the online process, and avoid the problem of poor position accuracy of the cylinder body due to movement. Secondly, the automatic positioning of the cylinder body is realized, thereby improving the efficiency of the cylinder body positioning.

[0018] 2. In the present invention, the extrusion plate is moved up to between the corresponding two hinged bars, so that the extrusion plate and the corresponding two hinged bars form a fixed triangular frame together, which improves the stability of positioning and locks the position of the limit rod at the same time. Through the locking process, it is ensured that the cylinder body is in the specified position before moving online, thereby ensuring the accuracy of the subsequent cylinder body online.

[0019] Third, a limit rod with a smaller diameter is first inserted into the through hole and then moved against the hole wall. The four resistance forces cooperate in pairs to position the cylinder body in the front, back, left and right directions, reducing the position accuracy requirements after the initial positioning of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a cylinder automatic positioning device for 3D printing equipment provided according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic diagram of an explosion structure between a cylinder body, a movable carrier plate and a frame provided according to an embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of a partially sectional three-dimensional structure among a cylinder body, a movable carrier plate and a limiting rod provided according to an embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of a partial cross-sectional three-dimensional structure between a movable carrier plate, a lifting seat and an extrusion plate provided according to an embodiment of the present invention is shown.

[0025] Figure 5 The embodiment of the present invention provides Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 A schematic diagram of a partially sectional three-dimensional structure among a lifting seat, a limiting rod and a matching cylinder provided according to an embodiment of the present invention is shown.

[0027] Figure 7 The embodiment of the present invention provides Figure 6 Enlarged view of point B in the middle.

[0028] Figure 8 A schematic diagram showing the state changes of four limiting rods provided according to an embodiment of the present invention limiting and pressing against the through holes at the bottom of the cylinder body is shown.

[0029] The above drawings include the following reference numerals: 1, frame; 2, base plate; 3, ball bearing; 4, movable carrier; 5, positioning mechanism; 50, L-shaped frame; 500, lifting seat; 501, limiting rod; 502, pressing strip; 51, longitudinal cylinder; 510, limiting plate; 52, sliding block; 520, hinge strip; 521, spring 1; 53, placement slot; 54, driving unit; 540, rotating shaft; 541, gear; 542, rack; 543. Horizontal rod; 544. Spring two; 545. Matching cylinder; 546. Spiral groove; 547. Matching rod; 548. Lag groove; 55. Mounting frame; 550. Mounting plate; 551. Pressing rod; 552. Limiting strip; 56. Fixed circular plate; 560. Spring three; 6. Locking unit; 60. Moving rod; 600. Locking plate; 601. Pushing plate; 602. Spring four; 61. Clip strip; 610. Extrusion plate; 7. Cylinder body. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] like Figure 1 and Figure 2 As shown, an automatic cylinder positioning device for 3D printing equipment includes a frame 1, a U-shaped base plate 2 is fixedly provided on the upper end surface of the frame 1, a plurality of balls 3 arranged circumferentially along the U-shaped region thereof are rollingly provided on the upper end surface of the base plate 2, a movable carrier plate 4 is placed on the upper end surface of the base plate 2, the movable carrier plate 4 is driven by an external hydraulic cylinder 1 (not shown in the figure) to move left and right and is used to carry and move the cylinder 7.

[0032] like Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, the frame 1 is provided with a positioning mechanism 5 for limiting the cylinder body 7, the positioning mechanism 5 includes an L-shaped frame 50, the movable carrier plate 4 is provided with an L-shaped frame 50, the upper end surface of the horizontal section of the L-shaped frame 50 is provided with a lifting seat 500 for sliding up and down through two connecting rods distributed left and right, the lifting seat 500 is driven by an external hydraulic cylinder 2 (not shown in the figure) to move up and down, the front and rear sides of the lifting seat 500 are provided with two limit rods 501 distributed left and right and with vertical axes, the left and right sides of the lifting seat 500 are provided with two clamping strips 502 distributed front and back, and the L-shaped frame 50 is provided with a driving unit 54, the driving unit 54 includes a group for moving toward each other and a delayed driving group, the lifting seat 500 rises and drives the limit rod 501 to be inserted into the through hole at the corresponding position of the bottom of the cylinder body 7, and the four limit rods 501 cooperate with each other to form two locking triangles, and the cylinder body 7 is centered front and back at the same time, and the clamping strips 502 on both sides clamp and center the cylinder body 7 left and right.

[0033] like Figure 1 and Figure 2 As shown, a preliminary limiting unit is provided on the upper end surface of the base plate 2, and the preliminary limiting unit includes a longitudinal cylinder 51 and a limiting plate 510 for preliminary limiting. Two rows of longitudinal cylinders 51 equidistantly arranged from left to right are fixedly provided on the upper end surface of the base plate 2. An L-shaped limiting plate 510 is fixedly provided at the telescopic end of the longitudinal cylinder 51. The inner corner area of ​​the limiting plate 510 faces downward, and the limiting plates 510 distributed front and back are symmetrical front and back. A locking unit 6 is provided on the L-shaped frame 50. The locking unit 6 includes a moving rod 60 for locking the clamping strip 502 and an extrusion plate 610 for locking the limiting rod 501. After completing the positioning and guiding of the cylinder body 7, the state of the cylinder body is locked by the locking unit 6, and then the cylinder body 7 is moved.

[0034] During operation, the external hydraulic cylinder works to move the mobile carrier 4 to the right, and then the existing external AGV places the cylinder body 7 on the mobile carrier 4. The mobile carrier 4 is reset and drives the cylinder body 7 to move left to the top of the frame 1. In this process, the friction between the mobile carrier 4 and the base plate 2 is reduced by setting a plurality of balls 3, so as to avoid excessive wear of the mobile carrier 4 while moving back and forth left and right, affecting the subsequent positioning process.

[0035] Afterwards, the longitudinal cylinder 51 works, so that its telescopic end drives the limit plate 510 to extend, and the limit plate 510 approaches the cylinder body 7 and the movable carrier plate 4. Finally, the vertical section of the limit plate 510 contacts the movable carrier plate 4, and the horizontal section of the limit plate 510 contacts the cylinder body 7. The limit plates 510 distributed front and back cooperate with each other to complete the limit and tightening of the movable carrier plate 4 and the cylinder body 7 in the front and rear directions. The limit of the movable carrier plate 4 ensures the stability of the movable carrier plate 4 during the subsequent adjustment and positioning of the cylinder body 7, and the limit and tightening process of the cylinder body 7 in the front and rear directions facilitates the subsequent positioning operation.

[0036] See also Figure 8 After that, the external hydraulic cylinder 2 works to make the lifting seat 500 move up, and the lifting seat 500 moves up to the specified position with the pressing strip 502. Then, as the lifting seat 500 continues to move up, the driving unit 54 works, so that the pressing strip 502 presses the left and right sides of the cylinder body 7, completing the limitation of the cylinder body 7 in the left and right directions. At this time, the limiting rod 501 is located directly below the corresponding through hole on the cylinder body 7. Then, as the lifting seat 500 continues to move up, the limiting rod 501 passes through the through hole at the bottom of the cylinder body 7 and makes the two limiting rods 501 on the same side gradually press against the inner wall of the through hole, that is, the positioning and guiding process of the cylinder body 7 is completed, and the locking unit 6 works, so that the two corresponding limiting rods 501 on the same side are locked, and the pressing strip 502 is locked, finally forming a stable positioning of the cylinder body 7, and then the external hydraulic cylinder 1 works to make the mobile carrier plate 4 drive the positioned cylinder body 7 to move out, and transport the cylinder body 7 to the 3D printing equipment.

[0037] like Figure 1 , Figure 4 and Figure 6 As shown, the positioning mechanism 5 includes a sliding block 52. The front and rear end surfaces of the lifting seat 500 are both provided with sliding blocks 52 for sliding forward and backward movement through a connecting shaft. The opposite back surfaces of the two sliding blocks 52 are both hingedly provided with two left-right symmetrical hinge bars 520. All limit rods 501 are fixedly provided on the upper end surfaces of the corresponding hinge bars 520. A spring 521 is commonly fixedly provided between two adjacent hinge bars 520 to maintain the angle between the two adjacent hinge bars 520 in the initial state through the spring 521.

[0038] like Figure 3 As shown, the diameter of the limiting rod 501 is smaller than the diameter of the through hole at the bottom of the cylinder body 7, which facilitates the limiting rod 501 to smoothly pass through the corresponding through hole during the subsequent positioning process, and also reduces the requirements for the accuracy of the initial placement position of the cylinder body 7.

[0039] like Figure 4 and Figure 6 As shown, a placement groove 53 is opened on the lifting seat 500 from front to back, and the opposite moving group includes a rotating shaft 540. The lower end surface of the lifting seat 500 is rotatably provided with a rotating shaft 540 that penetrates into the placement groove 53, and the rotating shaft 540 is located at the center of the lifting seat 500. A gear 541 is fixedly sleeved on the rotating shaft 540. Two racks 542 distributed left and right and meshing with the gear 541 are slidably arranged on the inner wall of the placement groove 53, and the two racks 542 are symmetrical about the left and right center of the axis of the rotation shaft 540. The sliding block 52 corresponds to the rack 542 one by one. A horizontal rod 543 with an axis extending from front to rear is fixedly arranged on the end surface of the sliding block 52 facing the corresponding rack 542. The horizontal rod 543 slides back and forth and penetrates the corresponding rack 542. A spring 544 sleeved on the horizontal rod 543 is fixedly provided between the rack 542 and the sliding block 52.

[0040] During operation, after the movable carrier plate 4 drives the cylinder body 7 to move above the frame 1, the external hydraulic cylinder 2 works to move the lifting seat 500 upward, and the lifting seat 500 drives the hinge strip 520 and the limit rod 501 thereon to move upward synchronously. It should be noted that through the preliminary guidance of the front and rear limit plates 510, the cylinder body 7 is located at the middle position in the front and rear direction on the movable carrier plate 4. At the same time, the clamping strip 502 clamps the cylinder body 7 in the process that the cylinder body 7 is located in the middle position in the left and right direction of the frame 1, that is, the alignment process of the cylinder body 7 is completed.

[0041] After that, the lifting seat 500 continues to move upward, so that the limiting rod 501 passes through the corresponding through hole on the cylinder body 7. Through the operation of the driving unit 54, the rotating shaft 540 drives the gear 541 to rotate, and the gear 541 is meshed with the rack 542 so that the rack 542 is away from the corresponding sliding block 52, so that the second spring 544 is stretched, and the elastic force generated by the stretching of the second spring 544 causes the sliding block 52 to pull the two hinge bars 520 thereon, and the hinge bar 520 pulls the corresponding limiting rod 501, so that the two limiting rods 501 corresponding to the same sliding block 52 gradually approach the inner wall of the through hole and finally press against the inner wall of the through hole (such as Figure 8 As shown), two locking triangles are formed which are symmetrical front and back.

[0042] The elastic properties of the spring 521 are used to maintain the angle between the two corresponding hinge strips 520 at a specified angle. When the center of the cylinder body 7 is initially located at the center of the frame 1, the vertical projection of the through hole covers the corresponding limit rod 501, ensuring that the subsequent limit rod 501 can be moved up and inserted into the corresponding through hole.

[0043] like Figure 4 , Figure 6 and Figure 7 As shown, the delay drive group includes a matching cylinder 545, the upper end surface of the L-shaped frame 50 is fixedly provided with the matching cylinder 545, the inner wall of the matching cylinder 545 is provided with a spiral groove 546, and the rotating shaft 540 is fixedly provided with a matching rod 547 that matches the spiral groove 546.

[0044] like Figure 7 As shown, a vertical hysteresis groove 548 is opened inside the mating cylinder 545 , and the hysteresis groove 548 is located below the spiral groove 546 and is connected to the spiral groove 546 . The mating rod 547 is located in the hysteresis groove 548 before mating with the spiral groove 546 .

[0045] like Figure 1 and Figure 4As shown, the positioning mechanism 5 also includes a mounting frame 55, and the left and right end surfaces of the lifting seat 500 are fixedly provided with an L-shaped mounting frame 55, and the upper end surface of the vertical section of the mounting frame 55 is fixedly provided with a mounting plate 550, and the lower end surface of the clamping strip 502 is hingedly provided on the corresponding mounting plate 550, and each clamping strip 502 is provided with a plurality of clamping rods 551 for positioning the waist-shaped grooves on the left and right end surfaces of the outer shell of the cylinder body 7, and the left and right end surfaces of the mounting plate 550 are fixedly provided with limit strips 552, and the corresponding two limit strips 552 cooperate with each other to limit the rotation angle of the corresponding two clamping strips 502 to always be within the set range.

[0046] like Figure 4 As shown, the multiple clamping rods 551 on the same clamping strip 502 are arranged equidistantly along the length direction of the clamping strip 502, and the axial direction of the clamping rod 551 is the same as the thickness direction of the clamping strip 502. A fixed circular plate 56 is fixedly provided on the end face of the clamping rod 551 away from the clamping strip 502, and a spring three 560 is fixedly provided between the fixed circular plate 56 and the clamping strip 502.

[0047] like Figure 1 , Figure 3 and Figure 5 As shown, the locking unit 6 includes a moving rod 60, and the horizontal section of the L-shaped frame 50 is provided with two moving rods 60 with vertical axes and left-right symmetry, which slide up and down. The two moving rods 60 are driven by an external hydraulic cylinder three (not shown in the figure) to move up and down. A locking plate 600 is fixedly provided between two adjacent clamping strips 502, and a locking groove is provided on the locking plate 600. The lower end of the inner wall of the locking groove and the upper end of the moving rod 60 are both chamfered. A mounting circular plate is fixedly sleeved on the moving rod 60, and a pushing plate 601 is provided above the moving rod 60. A spring four 602 is fixedly provided between the pushing plate 601 and the mounting circular plate.

[0048] When the cylinder body 7 moves to the designated position on the moving carrier plate 4, the external hydraulic cylinder 2 works to make the lifting seat 500 move up. At this time, the two mounting frames 55 drive the pressing strips 502 to move up. The pressing strips 502 are located on the left and right sides of the cylinder body 7. Then the external hydraulic cylinder 3 works to make the moving rod 60 drive the mounting circular plate, the pushing plate 601 and the spring 4 602 to move up synchronously. At this time, the pushing plate 601 is located above the moving rod 60. The pushing plate 601 moves and is close to the lower end of the locking plate 600. At this time, the upper end of the moving rod 60 is located at the pushing plate 601. , and the movable rod 60 is not plugged into the corresponding locking groove, contacts the corresponding two clamping strips 502, and pushes the clamping strip 502 so that the clamping strip 502 drives the clamping rod 551 thereon to approach the cylinder body 7, and finally the clamping rod 551 contacts the cylinder body 7, and the spring three 560 is stretched, thereby preliminarily limiting the left and right directions of the cylinder body 7, and cooperating with the limiting plate 510 to preliminarily limit the front and rear directions of the cylinder body 7, so that the cylinder body 7 is directly above the lifting seat 500, and at the same time, the limiting rod 501 is located below the corresponding through hole.

[0049] Afterwards, the external hydraulic cylinder 2 continues to work, so that the limit rod 501 moves up and passes through the corresponding through hole. In the above process, the lifting seat 500 drives the rotating shaft 540 and the matching rod 547 to move up synchronously, and the matching rod 547 slides in the hysteresis groove 548. As the limit rod 501 initially passes through the through hole, the matching rod 547 moves into the spiral groove 546, so that in the subsequent upward movement of the lifting seat 500, the rotating shaft 540 drives the gear 541 to rotate synchronously, that is, drives the limit rod 501 to position and guide the cylinder body.

[0050] Secondly, in the above process, spring three 560 is in a stretched state, and the lifting seat 500 drives the mounting plates 550 and the clamping strip 502 on the left and right sides to move up synchronously. During the upward movement of the clamping strip 502, part of the clamping rods 551 on the same mounting plate 550 are inserted into the corresponding waist-shaped groove, and the remaining clamping rods 551 continue to clamp the cylinder body 7. Therefore, the clamping rods 551 located in the waist-shaped groove capture and limit the cylinder body 7, and the clamping rods 551 located outside the waist-shaped groove clamp the cylinder body 7, thereby improving the stability in the subsequent process.

[0051] After the above process and the positioning process of the limit rod 501, the cylinder body 7 is positioned and limited to the specified position on the lifting seat 500, completing the positioning and guiding process of the cylinder body 7, and the external hydraulic cylinder 3 continues to work so that the moving rod 60 is inserted into the corresponding locking groove, thereby completing the latch locking of all the clamping strips 502.

[0052] like Figure 1 , Figure 3 and Figure 4As shown, the locking unit 6 also includes a circular strip 61, and the two moving rods 60 are fixedly provided with the circular strip 61. Two front-to-back distributed extrusion plates 610 are fixedly provided on the circular strip 61. The upper end of the extrusion plate 610 is an isosceles trapezoid with a larger upper part and a smaller lower part. The extrusion plate 610 squeezes the corresponding two hinged strips 520 to lock the corresponding two limit rods 501.

[0053] As the moving rod 60 drives the circular strip 61 to continue to move upward, the clamping strip 502 is locked, and the extrusion plate 610 moves upward to between the corresponding two hinge strips 520, so that the extrusion plate 610 and the corresponding two hinge strips 520 form a fixed triangular frame together, which improves the positioning stability and locks the position of the limit rod 501. Secondly, the inclined surface of the upper end part of the extrusion plate 610 facilitates the extrusion plate 610 to move upward and squeeze into between the corresponding two hinge strips 520.

[0054] In summary, the positioning guidance of the cylinder body 7 and the locking process after the positioning guidance are completed, which improves the stability of the subsequent moving carrier plate 4 in driving the cylinder body 7 to move into the 3D printing device, and when the cylinder body 7 is about to move into the 3D printing device, all structures are reset, and the cylinder body 7 is located at the specified position on the moving carrier plate 4.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements, and "set" can also only indicate a positional relationship. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic cylinder positioning device for 3D printing equipment, characterized in that: include: A frame (1), wherein a U-shaped base plate (2) is fixedly arranged on the upper end surface of the frame (1), a plurality of balls (3) arranged circumferentially along the U-shaped region of the base plate (2) are rollingly arranged on the upper end surface of the base plate (2), and a movable carrier plate (4) is placed on the upper end surface of the base plate (2); The frame (1) is provided with a positioning mechanism (5) for limiting the cylinder body (7), the positioning mechanism (5) comprising an L-shaped frame (50), the movable carrier plate (4) is provided with an L-shaped frame (50), the upper end surface of the horizontal section of the L-shaped frame (50) is provided with a lifting seat (500) for sliding up and down through two connecting rods distributed on the left and right, the front and rear sides of the lifting seat (500) are both provided with two limiting rods (501) distributed on the left and right and with vertical axes, and the left and right sides of the lifting seat (500) are both provided with two pressing strips (501) distributed on the front and rear sides. 2) A driving unit (54) is provided on the L-shaped frame (50), and the driving unit (54) includes an opposite movement group and a time-delay driving group. The lifting seat (500) rises to drive the limit rod (501) to insert into the through hole at the corresponding position of the bottom of the cylinder body (7). The time-delay driving group is used to drive the opposite movement group to drive the limit rod (501) to move against the inner wall of the through hole, so that the four limit rods (501) cooperate with each other to form two locking triangles, and at the same time, the front and rear center cylinder body (7) and the two side clamping strips (502) compress and left and right center cylinder body (7); The upper end surface of the base plate (2) is provided with a preliminary limiting unit, which comprises a longitudinal cylinder (51) and a limiting plate (510) for preliminary limiting. The L-shaped frame (50) is provided with a locking unit (6), which comprises a moving rod (60) for locking the pressing strip (502) and a pressing plate (610) for locking the limiting rod (501).

2. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: Two rows of longitudinal cylinders (51) arranged left and right are fixedly provided on the upper end surface of the base plate (2), and an inverted L-shaped limiting plate (510) is fixedly provided at the telescopic end of the longitudinal cylinder (51), the inner corner area of ​​the limiting plate (510) faces downward, and the limiting plates (510) distributed front and back are symmetrical front and back.

3. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: The positioning mechanism (5) comprises a sliding block (52). The front and rear end surfaces of the lifting seat (500) are both provided with sliding blocks (52) for forward and backward sliding movement via a connecting shaft. The opposite back surfaces of the two sliding blocks (52) are both hingedly provided with two left-right symmetrical hinge bars (520). All the limit rods (501) are fixedly provided on the upper end surfaces of the corresponding hinge bars (520). A spring 1 (521) is commonly fixedly provided between two adjacent hinge bars (520).

4. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: The diameter of the limiting rod (501) is smaller than the diameter of the through hole at the bottom of the cylinder body (7).

5. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: The lifting seat (500) is provided with a placement groove (53) penetrating front and rear, and the oppositely movable group includes a rotating shaft (540). The lower end surface of the lifting seat (500) is rotatably provided with a rotating shaft (540) penetrating into the placement groove (53), and the rotating shaft (540) is located at the center of the lifting seat (500). A gear (541) is fixedly sleeved on the rotating shaft (540), and two racks distributed left and right and meshing with the gear (541) are slidably provided on the inner wall of the placement groove (53) front and back. (542), and the two racks (542) are symmetrical about the left and right center of the axis of the rotating shaft (540), the sliding block (52) corresponds to the racks (542) one by one, and a horizontal rod (543) with an axis extending from front to rear is fixedly arranged on the end surface of the sliding block (52) facing the corresponding rack (542), and the horizontal rod (543) slides forward and backward to penetrate the corresponding rack (542), and a spring (544) is fixedly mounted on the horizontal rod (543) between the rack (542) and the sliding block (52).

6. The cylinder automatic positioning device for 3D printing equipment according to claim 5, characterized in that: The time-delay drive group comprises a matching cylinder (545), the upper end surface of the L-shaped frame (50) is fixedly provided with the matching cylinder (545), the inner wall of the matching cylinder (545) is provided with a spiral groove (546), a matching rod (547) matched with the spiral groove (546) is fixedly provided on the rotating shaft (540), a vertical hysteresis groove (548) is provided inside the matching cylinder (545), the hysteresis groove (548) is located below the spiral groove (546) and is connected with the spiral groove (546), and the matching rod (547) is located in the hysteresis groove (548) before matching with the spiral groove (546).

7. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: The positioning mechanism (5) also includes a mounting frame (55), and L-shaped mounting frames (55) are fixedly provided on both left and right end surfaces of the lifting seat (500), and a mounting plate (550) is fixedly provided on the upper end surface of the vertical section of the mounting frame (55), and the lower end surface of the clamping strip (502) is hingedly provided on the corresponding mounting plate (550), and the clamping strip (502) is provided with a plurality of clamping rods (551) for positioning waist-shaped grooves on the left and right end surfaces of the outer shell of the cylinder body (7), and limit strips (552) are fixedly provided on both left and right end surfaces of the mounting plate (550), and the two corresponding limit strips (552) cooperate with each other to limit the rotation angle of the corresponding two clamping strips (502) to always be within a set range.

8. The cylinder automatic positioning device for 3D printing equipment according to claim 7, characterized in that: The plurality of clamping rods (551) on the same clamping strip (502) are arranged equidistantly along the length direction of the clamping strip (502), and the axial direction of the clamping rod (551) is the same as the thickness direction of the clamping strip (502). A fixed circular plate (56) is fixedly arranged on the end surface of the clamping rod (551) away from the clamping strip (502), and a spring three (560) is fixedly arranged between the fixed circular plate (56) and the clamping strip (502).

9. The cylinder automatic positioning device for 3D printing equipment according to claim 1, characterized in that: The locking unit (6) comprises a moving rod (60), and the horizontal section of the L-shaped frame (50) is provided with two moving rods (60) with vertical axes and left-right symmetry, which slide up and down. The two moving rods (60) are driven by an external hydraulic cylinder three to move up and down. A locking plate (600) is fixedly provided between two adjacent clamping strips (502). A locking groove is provided on the locking plate (600). The lower end of the inner wall of the locking groove and the upper end of the moving rod (60) are both chamfered. A mounting circular plate is fixedly sleeved on the moving rod (60), and a pushing plate (601) is provided above the moving rod (60). A spring four (602) is fixedly provided between the pushing plate (601) and the mounting circular plate.

10. The cylinder automatic positioning device for 3D printing equipment according to claim 9, characterized in that: The locking unit (6) further comprises a circular strip (61), the two moving rods (60) being fixedly provided with the circular strip (61), the circular strip (61) being fixedly provided with two front-to-back distributed pressing plates (610), the upper end of the pressing plate (610) being an isosceles trapezoid with a larger upper portion and a smaller lower portion.

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