A 3D printing-based aluminum alloy gearbox housing fixing device

Abstract

The present invention discloses a 3D printing-based aluminum alloy gearbox housing fixing device, which relates to the technical field of 3D printing equipment, including a base, a sliding seat, a printing nozzle, a material discharging table, a pad, a support, a sliding rod, a clamping unit, a pressure plate, and a heat conduction unit. A pressure relief unit is provided in the support, and the pressure relief unit is used to drive the sliding rod to move in a direction away from the printing nozzle. The present invention clamps the lower structure of the gearbox housing after 3D printing by setting a clamping unit. During the clamping process, the heat of the lower structure of the gearbox housing is transferred to the heat conduction unit, and the heat conduction unit triggers the action of the pressure relief unit, thereby causing the pressure relief unit to drive the sliding rod to move slightly in a direction away from the printing nozzle (gearbox housing), so that the pressing force of the pressure plate on the gearbox housing can be reduced, and the excessive pressing force is avoided to cause indentations or depressions on the lower structure of the gearbox housing that is not fully solidified, thereby affecting the appearance quality of the gearbox housing after 3D printing.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing equipment, and in particular to an aluminum alloy gearbox housing fixing device based on 3D printing. Background Art

[0002] 3D printing, a type of rapid prototyping technology, is a technology that uses powdered metal or plastic and other bondable materials to construct three-dimensional objects. Also known as additive manufacturing technology, it is a technology that manufactures solid parts by accumulating materials layer by layer based on three-dimensional CAD data. Since the structure of the gearbox is relatively sophisticated and complex, the traditional mechanical processing method is relatively cumbersome and the processing efficiency is low when processing the gearbox, so 3D printing technology is used for processing and production.

[0003] A Chinese utility model patent publication number CN211489616U is searched and discloses a fixing device for an orthopedic 3D printer, comprising a base, a support frame and a loading platform, wherein fixed casters are installed at the corner positions of the bottom end of the base, a motor is fixed at the center position inside the base, and a rotating shaft is installed at the output end of the motor through a coupling, the left and right sides of the bottom end of the support frame are fixedly connected to the top end of the base, and a loading platform is installed horizontally at the bottom of the support frame, and a rotating shaft is installed at the center position of the bottom end of the loading platform. There is an angular gearbox, and the top of the rotating shaft extends to the bottom of the angular gearbox, screws are installed on both ends of the left and right ends of the angular gearbox, and feed nuts are installed on the screws, an orthopedic 3D printer is placed at the center of the top of the stage, and a pressure plate is horizontally arranged above the orthopedic 3D printer, a positioning plate is horizontally arranged above the support frame, and a pull ring is fixed at the center of the top of the positioning plate, columns are installed at the corners between the positioning plate and the pressure plate through locking nuts, and the columns all pass through the support frame.

[0004] In the above-mentioned prior art, a plurality of clamps are used to clamp and fix the 3D printed object to prevent the lower structure of the 3D printed object from being offset when the 3D printing device is manufacturing the upper structure of the 3D printed object, thereby affecting the overall contour accuracy of the 3D printed object. However, since the internal heat of the lower structure is not completely dissipated after printing, it is not completely solidified, resulting in weak pressure-bearing capacity of the structure surface. If the extrusion force of the clamp on the lower structure is too large, it is easy to cause depression or indentation on the surface of the 3D printed object, thereby affecting the appearance quality of the 3D printed object. Summary of the invention

[0005] The purpose of the present invention is to provide an aluminum alloy gearbox housing fixing device based on 3D printing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A 3D printing-based aluminum alloy gearbox housing fixing device comprises a 3D printer base, a sliding seat is horizontally slidably connected to the top of the base, a printing nozzle is arranged above the sliding seat, and further comprises:

[0008] A material unloading platform connected to the top of the sliding seat;

[0009] A support frame fixedly connected to the top of the sliding seat, wherein the material unloading platform is located in the middle hollow part of the support frame;

[0010] A plurality of supports fixedly connected to the top of the cushion frame;

[0011] A sliding rod horizontally penetrates the support, the sliding rod slides freely on the support, and the support is provided with a clamping unit for driving the sliding rod to slide horizontally;

[0012] A pressure plate is fixedly connected to one end of the sliding rod facing the print head, a heat conduction unit is provided on the pressure plate, a pressure relief unit used in conjunction with the heat conduction unit is provided in the support, and the pressure relief unit is used to drive the sliding rod to overcome the force of the clamping unit to move in a direction away from the print head.

[0013] Furthermore, a cylinder support is connected to the top of the base, a push cylinder is horizontally installed on the side wall of the cylinder support, and a cylinder rod of the push cylinder is drivingly connected to the sliding seat.

[0014] Furthermore, the print head is driven to move by a driving unit, and the driving unit includes a transverse movement component and a longitudinal movement component. The transverse movement component is used to drive the print head to move transversely, and the longitudinal movement component is used to drive the print head to move longitudinally.

[0015] Furthermore, the transverse movement assembly includes support plates vertically fixed to both sides of the base, and a first ball screw is connected between the two support plates for horizontal rotation. The first ball screw is driven to rotate by a first motor installed on one of the support plates. The first ball screw is threadedly sleeved with a first nut sleeve on the periphery of the first ball screw, and the first nut sleeve and the first ball screw constitute a rolling screw transmission. A bracket is fixedly sleeved on the first nut sleeve, and a mounting block is vertically slidably connected to the surface of the bracket, and the print head is installed on the mounting block.

[0016] Furthermore, a guide rod is horizontally provided between the two support plates, and a guide hole is provided on the surface of the bracket for the guide rod to freely pass through.

[0017] Furthermore, the longitudinal movement assembly includes a motor plate fixedly connected to the top of the bracket, a second motor is installed on the top of the motor plate, the output shaft of the second motor is drivingly connected to the second ball screw, the mounting block is embedded with a second nut sleeve, the second nut sleeve is threadedly sleeved on the periphery of the second ball screw, and forms a rolling screw transmission with the second ball screw.

[0018] Furthermore, the clamping unit includes an electromagnet embedded in the outer wall of the support, and the end of the sliding rod away from the pressure plate is sleeved with a limiting sleeve, and the limiting sleeve is used in conjunction with the electromagnet. A spring is wound around the periphery of the sliding rod, and the two ends of the spring elastic force direction elastically press against the limiting sleeve and the outer wall of the support respectively.

[0019] Furthermore, the heat conductive unit includes a heat conductive block embedded in the side of the pressure plate facing the print head, a heat conductive wire is fixedly connected to the upper surface of the heat conductive block, a liquid storage cavity in the form of a blind hole is opened on the top of the support, an end cover for closing the mouth of the liquid storage cavity is connected to the top of the support, and an end of the heat conductive wire away from the heat conductive block penetrates the end cover and extends into the liquid storage cavity.

[0020] Furthermore, the pressure relief unit includes a piston coaxially engaged in the liquid storage chamber, the piston slides freely up and down in the liquid storage chamber, a driving rod is vertically fixed to the lower end face of the piston, the driving rod slides freely in the support and a ball is rotatably embedded in the lower end thereof, a notch-shaped limiting groove is provided on the upper side of the periphery of the sliding rod, the limiting groove is inclined on one side away from the pressure plate, and the ball is used in conjunction with the inclined surface on the limiting groove.

[0021] The top of the sliding seat is provided with a groove for sliding contact, and the bottom of the sliding seat is provided with a groove for sliding contact. The groove is provided with a groove for sliding contact, and the groove is connected with the top of the sliding seat to the bottom of the sliding seat. The groove is connected with the groove of the sliding seat to the bottom of the sliding seat. The groove is connected with the groove of the sliding seat to the bottom of the sliding seat.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention clamps the lower structure of the gearbox housing after 3D printing by setting a clamping unit. During the clamping process, the heat of the lower structure of the gearbox housing is transferred to the heat conduction unit, and the heat conduction unit triggers the pressure relief unit to drive the sliding rod to move slightly away from the print head (gearbox housing), so that the pressing force of the pressure plate on the gearbox housing can be reduced, avoiding excessive pressing force to cause indentations or depressions on the lower structure of the gearbox housing that is not fully cured, thereby affecting the appearance quality of the gearbox housing after 3D printing;

[0024] 2. The present invention provides a roller and a strip block. When the unloading table is driven by the push cylinder to move to the bottom of the print head, the roller rolls from the lowest end of the roller surface of the strip block to the highest end, thereby driving the cross arm to move upward. When the cross arm moves upward, it drives the sliding sleeve to move upward, so that the periphery of the unloading table and the inner wall of the tapered hole of the sliding sleeve slide relative to each other, thereby causing the periphery of the unloading table to be subjected to an extrusion force along the radial inner side of the unloading table. Since the periphery of the unloading table is provided with a deformation seam, the unloading table is elastically contracted and deformed, and the deformation seam is in a closed state. At this time, the upper end surface of the unloading table can be used for the gear box housing. After the 3D printing of the solid body is completed, the unloading table moves in the direction away from the print nozzle, so that the roller rolls from the highest end of the roller surface to the lowest end, so that the cross arm moves downward, and the inner wall of the tapered hole of the sliding sleeve and the periphery of the unloading table slide relative to each other again, and the unloading table is transformed from the original elastic contraction deformation to elastic expansion deformation, and the deformation seam is in an open state. During the elastic expansion process, the bottom surface of the gear box housing and the upper end surface of the unloading table slide relative to each other, so that the bottom surface of the gear box housing will not adhere to the upper end surface of the unloading table, so that it is convenient for the staff to remove the gear box housing after printing;

[0025] 3. The present invention sets a heat-conducting block to contact the lower structural surface of the gear box housing after printing has just been completed. The heat of the gear box housing is transferred to the heat-conducting block, and is transferred to the heat-conducting oil in the liquid storage chamber by the heat-conducting wire. The heat-conducting oil expands due to heat and generates a thrust on the piston, causing the piston to move downward, and the driving rod to move downward, thereby causing the ball to roll on the inclined surface of the limit groove, thereby generating a horizontal thrust on the sliding rod, causing the sliding rod to overcome the magnetic attraction of the electromagnet on the limit sleeve, and move slightly in the direction away from the print head, thereby reducing the pressure of the pressure plate on the surface of the gear box housing after printing has just been completed. The structure is simple and does not require manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an aluminum alloy gearbox housing fixing device based on 3D printing in the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure from a side view angle;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure from a top-down angle;

[0029] Figure 4 for Figure 3 Schematic diagram of the structure from a side view angle;

[0030] Figure 5 for Figure 1 The schematic diagram of the structure after the base is omitted;

[0031] Figure 6 for Figure 5 Schematic diagram of the structure at an upward viewing angle;

[0032] Figure 7 It is a schematic diagram of the structure after the sliding sleeve, the cross arm and the unloading platform are assembled in the present invention;

[0033] Figure 8 for Figure 7 A schematic cross-sectional view of the middle structure;

[0034] Fig. 9 for Figure 7 Schematic diagram of the explosion decomposition structure;

[0035] Fig.10 It is a schematic diagram of the structure after the support, sliding rod and pressing plate are assembled in the present invention;

[0036] Fig.11 for Fig.10 Schematic diagram of the cross-section of the middle structure.

[0037] In the figure, the reference numerals are as follows: 1, base; 2, cushion block; 3, bar block; 4, pillar; 5, sliding seat; 6, cushion frame; 7, support plate; 8, first ball screw; 9, first nut sleeve; 10, bracket; 11, second motor; 12, second ball screw; 13, mounting block; 14, print head; 15, first motor; 16, guide rod; 17, support; 18, unloading table; 19 , pushing cylinder; 20, cross arm; 21, sliding sleeve; 22, roller surface; 23, roller; 24, deformation joint; 25, connecting part; 26, through hole; 27, air avoidance groove; 28, tapered hole; 29, end cover; 30, thermal wire; 31, sliding rod; 32, thermal block; 33, pressure plate; 34, spring; 35, limiting sleeve; 36, liquid storage chamber; 37, piston; 38, ball; 39, limiting groove. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 11 The present invention provides a technical solution: a 3D printing-based aluminum alloy gearbox housing fixing device, comprising a base 1 of a 3D printer, a sliding seat 5 is horizontally slidably connected to the top of the base 1, specifically, first slide rails are respectively installed on both sides of the top width direction of the base 1, a first slider is installed on the first slide rail, a first cushion block 2 is welded on the top of the first slider, the bottom of the sliding seat 5 is connected to the two first cushion blocks 2, a cylinder support is connected to the top of the base 1, a push cylinder 19 is horizontally installed on the side wall of the cylinder support, and the cylinder rod of the push cylinder 19 is drivingly connected to the sliding seat 5, thereby driving the sliding seat 5 to move horizontally on the base 1 by extending and retracting the cylinder rod of the push cylinder 19;

[0040] like Figure 1 , Figure 2 As shown, both sides of the base 1 in the width direction are also vertically fixedly connected with support plates 7, and a first ball screw 8 is connected between the two support plates 7 for horizontal rotation. The first ball screw 8 is driven to rotate by a first motor 15 installed on one of the support plates 7. The first ball screw 8 is threadedly sleeved with a first nut sleeve 9 on the periphery of the first ball screw 8. The first nut sleeve 9 and the first ball screw 8 form a rolling spiral transmission. A bracket 10 is fixedly sleeved on the first nut sleeve 9, and a mounting block 13 is vertically slidably connected to the surface of the bracket 10. Specifically, a second slide rail is vertically installed on the side wall of the bracket 10, a second slider is installed on the second slide rail, a mounting block 13 is welded on the second slider, and a print head 14 of the 3D printer is installed on the mounting block 13 , and the nozzle of the print head 14 faces downward, thereby, the first motor 15 output shaft rotates, thereby driving the first ball screw 8 to rotate, and when the first ball screw 8 rotates, the first nut sleeve 9 is synchronously driven to move on the periphery of the first ball screw 8, thereby driving the bracket 10 to move horizontally, and when the bracket 10 moves horizontally, the mounting block 13 and the print head 14 are synchronously driven to move horizontally. In addition, a guide rod 16 is horizontally penetrated between the two support plates 7, and a guide hole for the guide rod 16 to pass freely is opened on the surface of the bracket 10, so that the guide rod 16 slides in the guide hole, thereby avoiding the bracket 10 from deflecting during the rolling spiral transmission process of the first nut sleeve 9 and the first ball screw 8;

[0041] like Figure 1 , Figure 2 and Figure 4As shown, a motor plate is horizontally connected to the top of the bracket 10, a second motor 11 is installed on the top of the motor plate, the output shaft of the second motor 11 is drivingly connected to the second ball screw 12, a second nut sleeve (not shown in the figure) is embedded in the mounting block 13, the second nut sleeve is threadedly sleeved on the periphery of the second ball screw 12, and a rolling spiral transmission is formed with the second ball screw 12, thereby, the output shaft of the second motor 11 rotates, thereby driving the second ball screw 12 to rotate, and during the rotation of the second ball screw 12, the second nut sleeve is synchronously driven to move vertically, and then the mounting block 13 is driven to move vertically, thereby driving the print head 14 to move up and down;

[0042] Combination Figure 1 , Figure 2 , Figure 7 , Figure 8 and Fig. 9As shown, a backing frame 6 in the shape of a Chinese character “Yu” is fixedly connected to the top of the sliding seat 5. In addition, a connecting portion 25 is connected to the top of the sliding seat 5. The connecting portion 25 is cylindrical, and a discharge platform 18 is coaxially fixedly connected to its upper end. The discharge platform 18 is located in the middle hollow part of the backing frame 6. The outer diameter of the discharge platform 18 decreases from top to bottom, and the end with the smallest outer diameter of the discharge platform 18 is connected to the connecting portion 25. An air avoidance groove 27 extending to the inside of the discharge platform 18 is provided at the bottom of the connecting portion 25. A deformation seam 24 extending to the periphery of the connecting portion 25 is provided at the periphery of the discharge platform 18. A sliding sleeve 21 is sleeved on the periphery of the connecting portion 25. The sliding sleeve 21 slides freely on the periphery of the connecting portion 25, and A tapered hole 28 is provided at the upper end of the sliding sleeve 21 to match the material discharge platform 18. In addition, a through hole 26 is provided on the sliding sleeve 21 for the connection part 25 to slide with. A horizontal arm 20 is fixedly connected to both sides of the periphery of the sliding sleeve 21. The end of the horizontal arm 20 away from the sliding sleeve 21 is vertically fixedly connected to the pillar 4. A through groove is provided on the surface of the cushion frame 6 for the horizontal arm 20 to pass freely. A roller 23 is rotatably connected to the lower end of the pillar 4. A strip block 3 is fixedly connected to the top of the base 1. A roller surface 22 for the roller 23 to roll and contact is provided on the upper surface of the strip block 3. The roller surface 22 is sloped, and the side of the roller surface 22 away from the print nozzle 14 is the lowest end. Therefore, when 3D printing is required, When printing, the cylinder rod of the cylinder 19 is extended, and the sliding seat 5 is driven to move toward the direction of the printing nozzle 14 until the discharge table 18 on the sliding seat 5 moves to the bottom of the printing nozzle 14. In this process, the roller 23 rolls from the lowest end of the roller surface 22 to the highest end, so that the roller 23 drives the support 4 and the cross arm 20 to move upward. When moving upward, the sliding sleeve 21 also moves upward synchronously, so that the inner wall of the tapered hole 28 on the sliding sleeve 21 and the periphery of the discharge table 18 slide relative to each other, thereby causing the discharge table 18 to produce elastic contraction deformation. During the elastic contraction deformation process, the deformation gap 24 changes from an open state to a closed state, thereby causing the deformation gap 24 to Until it is completely closed, at this time, the upper end surface of the unloading table 18 is in a flat form, and the print nozzle 14 can perform 3D printing operations on the upper end surface of the unloading table 18. After the 3D printing is completed, the cylinder rod of the cylinder 19 is shortened, and the sliding seat 5 is driven to move away from the print nozzle 14. At this time, the roller 23 will roll from the highest end of the roller surface 22 to the lowest end. Due to the elastic deformation ability of the unloading table 18 itself, the sliding sleeve 21 will be driven to move downward. In this process, the inner wall of the tapered hole 28 of the sliding sleeve 21 and the periphery of the unloading table 18 slide relative to each other again, so that the unloading table 18 is elastically expanded, and the deformation seam 24 is also changed from a closed state to an open state;

[0043] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 and Fig.11As shown, four supports 17 are connected to the top of the pad frame 6 in an array along the center line of the pad frame 6, and a sliding rod 31 is horizontally penetrated on the support 17. The sliding rod 31 slides freely on the support 17, and an arc-shaped pressure plate 33 is fixedly connected to the end of the sliding rod 31 facing the print nozzle 14. An electromagnet (not shown in the figure) is embedded on the outer wall of the support 17 on the side facing away from the print nozzle 14. The end of the sliding rod 31 away from the pressure plate 33 is sleeved with a limiting sleeve 35, and the limiting sleeve 35 is used in conjunction with the electromagnet. Specifically, the material of the limiting sleeve 35 is made of any one of iron, cobalt and nickel. In this way, when the electromagnet is energized to generate magnetism, it will generate magnetic attraction on the limiting sleeve 35, thereby driving the limiting sleeve 35 toward the electromagnet. The spring 34 is wound around the periphery of the sliding rod 31, and the two ends of the spring 34 in the elastic direction elastically press against the limiting sleeve 35 and the outer wall of the support 17 respectively. When the limiting sleeve 35 moves in the direction of the electromagnet, the limiting sleeve 35 will compress the spring 34, and the spring 34 will begin to accumulate elastic potential energy. Therefore, when the lower side structure of the gear box housing is printed, the external power supply is turned on, so that the electromagnet is energized and generates magnetism, thereby generating suction on the limiting sleeve 35, and then driving the limiting sleeve 35 to move in the direction of the electromagnet, so that the sliding rod 31 drives the pressing plate 33 to move in the direction of the gear box housing, until the pressing plate 33 presses the surface of the gear box housing to clamp the gear box housing;

[0044] Combination Fig.10 and Fig.11 As shown, a heat conducting block 32 is embedded on the side of the pressure plate 33 facing the print head 14. When the pressure plate 33 presses the surface of the gear box housing, the heat conducting block 32 will contact the surface of the gear box housing. A heat conducting wire 30 is fixedly connected to the upper surface of the heat conducting block 32. A liquid storage cavity 36 in the form of a blind hole is opened on the top of the support 17. A heat conducting medium is stored in the liquid storage cavity 36. The heat conducting medium can be heat conducting oil or other heat conducting liquids. An end cap 29 for sealing the mouth of the liquid storage cavity 36 is connected to the top of the support 17. One end of the heat conducting wire 30 away from the heat conducting block 32 penetrates the end cap 29 and extends into the liquid storage cavity 36. The heat of the gear box housing is transferred to the heat conducting block 32, and is transferred to the heat conducting oil in the liquid storage cavity 36 by the heat conducting wire 30. When the heat reaches a certain level, the heat conducting oil will expand in volume.

[0045] Combination Fig.10 and Fig.11As shown, a piston 37 is coaxially engaged in the liquid storage chamber 36, and the piston 37 slides freely up and down in the liquid storage chamber 36. A driving rod is vertically fixed to the lower end surface of the piston 37, and the driving rod slides freely in the support 17. A ball 38 is rotatably embedded at the lower end of the driving rod. A limiting groove 39 in the form of a notch is opened on the upper side of the periphery of the sliding rod 31. The limiting groove 39 is inclined on the side away from the pressure plate 33. The ball 38 cooperates with the inclined surface on the limiting groove 39. When the heat transfer oil expands due to heat and generates a thrust on the piston 37, the piston 37 moves downward and the driving rod moves downward, thereby causing the ball 38 to roll on the inclined surface of the limiting groove 39, thereby generating a horizontal thrust on the sliding rod 31, so that the sliding rod 31 overcomes the magnetic attraction of the electromagnet on the limiting sleeve 35 and moves slightly in the direction away from the print head 14, thereby reducing the pressure of the pressure plate 33 on the surface of the gear box housing that has just been printed.

[0046] Working principle of the present invention:

[0047] Initial stage of printing: first start the push cylinder 19, extend the cylinder rod of the push cylinder 19, and drive the sliding seat 5 to move in the direction of the print nozzle 14, until the discharge table 18 on the sliding seat 5 moves to the bottom of the print nozzle 14. During this process, the roller 23 rolls from the lowest end of the roller surface 22 to the highest end, so that the roller 23 drives the pillar 4 and the cross arm 20 to move upward. When moving upward, the sliding sleeve 21 also moves upward synchronously, so that the inner wall of the tapered hole 28 on the sliding sleeve 21 and the periphery of the discharge table 18 slide relative to each other, thereby causing the discharge table 18 to produce elastic contraction deformation. During the elastic contraction deformation process, the deformation seam 24 changes from an open state to a closed state, thereby causing the deformation seam 24 to be completely closed. At this time, the upper end surface of the discharge table 18 is in a plane form, and the print nozzle 14 can perform 3D printing operations on the upper end surface of the discharge table 18;

[0048] During the printing process: the print head 14 moves horizontally and vertically, and then performs gear box housing operation on the upper end surface of the discharge table 18. Specifically, the first motor 15 output shaft rotates, thereby driving the first ball screw 8 to rotate. When the first ball screw 8 rotates, it synchronously drives the first nut sleeve 9 to move on the periphery of the first ball screw 8, thereby driving the bracket 10 to move horizontally. When the bracket 10 moves horizontally, it synchronously drives the mounting block 13 and the print head 14 to move horizontally, and the output shaft of the second motor 11 rotates, thereby driving the second ball screw 12 to rotate. During the rotation of the second ball screw 12, it synchronously drives the second nut sleeve to move vertically, thereby driving the mounting block 13 to move vertically. In this way, the print head 14 is driven to move up and down. In summary, the print head 14 can move and start the printing operation. After the structure on the lower side of the gear box housing is printed, observe whether the surface of the gear box housing is solidified. When it is solidified to a certain extent (that is, the surface contour is basically finalized), turn on the external power supply to energize the electromagnet and generate magnetism, thereby generating suction on the limit sleeve 35, and then drive the limit sleeve 35 to move in the direction of the electromagnet, so that the sliding rod 31 drives the pressure plate 33 to move in the direction of the gear box housing to a fixed position until the pressure plate 33 presses the surface of the gear box housing to clamp the surface of the lower structure of the gear box housing. In addition, due to the setting of the spring 34, the pressure plate 33 presses the surface of the gear box housing. During clamping, the movement of the pressure plate 33 is buffered to a certain extent, preventing the pressure plate 33 from clamping quickly and causing an impact on the gear box housing. During the clamping process, the heat of the gear box housing is transferred to the heat conducting block 32, and is transferred to the heat conducting oil in the liquid storage chamber 36 by the heat conducting wire 30. When the heat reaches a certain level, the heat conducting oil will expand in volume. The heat conducting oil expands in volume due to heat and generates a thrust on the piston 37, causing the piston 37 to move downward, and causing the driving rod to move downward, thereby causing the ball 38 to roll slightly on the inclined surface of the limiting groove 39, thereby generating a horizontal thrust on the sliding rod 31, causing the sliding rod 31 to overcome the magnetic attraction of the electromagnet on the limiting sleeve 35, and move slightly in a direction away from the print head 14. , thereby reducing the pressure of the pressure plate 33 on the surface of the gear box housing that has just been printed, and thus achieving that when the volume of the heat transfer oil expands slightly, it can generate a reverse force on the sliding rod 31, thereby causing the sliding rod 31 to move slightly to reduce the pressure of the pressure plate 33 on the surface of the gear box housing, and as the lower side structure of the gear box housing cools and solidifies, the heat of the heat transfer oil is also dissipated, thereby shrinking in volume and causing the piston 37 to move upward. When the piston 37 moves upward, the ball 38 will roll from the high point of the inclined surface of the limiting groove 39 to the low point. Since the electromagnet always has a magnetic attraction to the limiting sleeve 35, the sliding rod 31 moves toward the direction of the gear box housing to maintain the clamping force of the pressure plate 33 on the gear box housing;

[0049] At the end of printing: After printing is completed, first disconnect the power supply so that the electromagnet loses its power and loses its magnetism. At this time, the elastic potential energy of the spring 34 is released, so that the limit sleeve 35 drives the sliding rod 31 to move away from the print nozzle 14, thereby eliminating the pressure of the pressure plate 33 on the gear box housing. Then start the push cylinder 19, shorten the cylinder rod of the push cylinder 19, and drive the sliding seat 5 to move away from the print nozzle 14. At this time, the roller 23 will roll from the highest end of the roller surface 22 to the lowest end. Its own elastic deformation ability will drive the sliding sleeve 21 to move downward. During this process, the inner wall of the tapered hole 28 of the sliding sleeve 21 and the periphery of the discharge table 18 slide relative to each other again, so that the discharge table 18 expands elastically, and the deformation seam 24 also changes from a closed state to an open state. During the elastic expansion process, the bottom surface of the gear box housing and the upper end surface of the discharge table 18 slide relative to each other, so that the bottom surface of the gear box housing will not adhere to the upper end surface of the discharge table 18, which makes it easy for the staff to remove the gear box housing after printing.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printing-based aluminum alloy gearbox housing fixing device, comprising a 3D printer base (1), a sliding seat (5) being horizontally slidably connected to the top of the base (1), a printing nozzle (14) being arranged above the sliding seat (5), characterized in that: Also includes: A material unloading platform (18) connected to the top of the sliding seat (5); A support frame (6) fixedly connected to the top of the sliding seat (5), the unloading platform (18) being located in a middle hollow portion of the support frame (6); A plurality of supports (17) fixedly connected to the top of the cushion frame (6); a sliding rod (31) horizontally penetrated on the support (17), the sliding rod (31) freely sliding on the support (17), and a clamping unit for driving the sliding rod (31) to slide horizontally is provided on the support (17); a pressure plate (33) fixedly connected to one end of the sliding rod (31) facing the printing nozzle (14), the pressure plate (33) being provided with a heat conduction unit, the support (17) being provided with a pressure relief unit used in conjunction with the heat conduction unit, the pressure relief unit being used to drive the sliding rod (31) to overcome the force of the clamping unit so as to move in a direction away from the printing nozzle (14); The clamping unit comprises an electromagnet embedded in the outer wall of the support (17); one end of the sliding rod (31) away from the pressure plate (33) is sleeved with a limit sleeve (35); the limit sleeve (35) is used in conjunction with the electromagnet; a spring (34) is sleeved around the periphery of the sliding rod (31); the two ends of the spring (34) in the direction of elastic force respectively and correspondingly elastically press against the limit sleeve (35) and the outer wall of the support (17); The heat conduction unit comprises a heat conduction block (32) embedded in a side of the pressure plate (33) facing the print head (14); a heat conduction wire (30) is fixedly connected to the upper surface of the heat conduction block (32); a liquid storage cavity (36) in the form of a blind hole is opened at the top of the support (17); an end cover (29) for closing the mouth of the liquid storage cavity (36) is connected to the top of the support (17); an end of the heat conduction wire (30) away from the heat conduction block (32) penetrates the end cover (29) and extends into the liquid storage cavity (36); The pressure relief unit comprises a piston (37) coaxially engaged in the liquid storage chamber (36), the piston (37) freely sliding up and down in the liquid storage chamber (36), a driving rod vertically fixed to the lower end surface of the piston (37), the driving rod freely sliding in the support (17) and a ball (38) rotatably embedded in the lower end thereof, a limiting groove (39) in the form of a notch is provided on the upper side of the periphery of the sliding rod (31), the limiting groove (39) is inclined on a side away from the pressure plate (33), and the ball (38) is used in conjunction with the inclined surface on the limiting groove (39).

2. The aluminum alloy gearbox housing fixing device based on 3D printing according to claim 1 is characterized in that: The top of the base (1) is connected to a cylinder support, a push cylinder (19) is horizontally mounted on the side wall of the cylinder support, and a cylinder rod of the push cylinder (19) is drivingly connected to the sliding seat (5).

3. The 3D printing-based aluminum alloy gearbox housing fixing device according to claim 1 is characterized in that: The print head (14) is driven to move by a driving unit, the driving unit comprising a transverse movement component and a longitudinal movement component, the transverse movement component is used to drive the print head (14) to move transversely, and the longitudinal movement component is used to drive the print head (14) to move longitudinally.

4. The 3D printing-based aluminum alloy gearbox housing fixing device according to claim 3 is characterized in that: The transverse movement assembly comprises support plates (7) vertically fixed to both sides of the base (1), a first ball screw (8) being connected between the two support plates (7) for horizontal rotation, the first ball screw (8) being driven to rotate by a first motor (15) installed on one of the support plates (7), a first nut sleeve (9) being threadedly sleeved on the periphery of the first ball screw (8), the first nut sleeve (9) and the first ball screw (8) forming a rolling spiral transmission, a bracket (10) being fixedly sleeved on the first nut sleeve (9), a mounting block (13) being vertically slidably connected to the surface of the bracket (10), and the printing nozzle (14) being mounted on the mounting block (13).

5. The 3D printing-based aluminum alloy gearbox housing fixing device according to claim 4 is characterized in that: A guide rod (16) is horizontally passed through the two support plates (7), and a guide hole is provided on the surface of the bracket (10) for the guide rod (16) to pass freely.

6. The 3D printing-based aluminum alloy gearbox housing fixing device according to claim 4 is characterized in that: The longitudinal movement assembly comprises a motor plate fixedly connected to the top of the bracket (10), a second motor (11) being mounted on the top of the motor plate, an output shaft of the second motor (11) being drivingly connected to a second ball screw (12), a second nut sleeve being embedded in the mounting block (13), the second nut sleeve being threadedly sleeved on the periphery of the second ball screw (12) and forming a rolling screw transmission with the second ball screw (12).

7. The aluminum alloy gearbox housing fixing device based on 3D printing according to claim 1 is characterized in that: The outer diameter of the material discharging platform (18) decreases from top to bottom, and a connecting portion (25) is coaxially fixedly connected to the end with the smallest outer diameter. The connecting portion (25) is connected to the top of the sliding seat (5). The bottom of the connecting portion (25) is provided with a space-avoiding groove (27) extending to the inside of the material discharging platform (18). The periphery of the material discharging platform (18) is provided with a deformation seam (24) extending to the periphery of the connecting portion (25). The periphery of the connecting portion (25) is sleeved with a sliding sleeve (21). The sliding sleeve (21) slides freely on the periphery of the connecting portion (25), and the upper end of the sliding sleeve (21) is provided with a conical groove matching the material discharging platform (18). A hole (28) is provided, and a horizontal arm (20) is fixedly connected to both sides of the periphery of the sliding sleeve (21). One end of the horizontal arm (20) away from the sliding sleeve (21) is vertically fixedly connected to a pillar (4). A through groove for the horizontal arm (20) to pass freely is provided on the surface of the cushion frame (6). A roller (23) is rotatably connected to the lower end of the pillar (4). A strip block (3) is fixedly connected to the top of the base (1). A roller surface (22) for the roller (23) to roll and contact is provided on the upper surface of the strip block (3). The roller surface (22) is in a slope shape, and the side of the roller surface (22) away from the printing nozzle (14) is the lowest end.

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