CN104760287B - A fast-switching and precise positioning device with multiple forming ports and multiple feeders - Google Patents

Abstract

The invention relates to a fast-switching and precise positioning device for multi-forming ports and multi-feeders, which belongs to the field of additive manufacturing. The storage tank and the motor are fixedly connected to the top of the connecting plate, the bottom of the delivery tube is connected to the support base through a plane bearing, the upper part of the delivery tube is connected to the output shaft of the motor through a spline shaft, and a guide frame is connected inside the delivery tube. The feeder is connected to the material storage barrel through the feeder tube, the top of the feeder is connected to the spring, the forming port is fixedly connected to the lower part of the feeder, and a pressing block is connected to the outer edge of the top of the feeding barrel. Corresponding to the installation position of the feeder. The advantage is that the structure is novel, and it is used for fast switching and precise positioning of various melt or liquid material feeders and forming ports in additive manufacturing equipment. It can not only meet the lamination forming requirements of heterogeneous materials with different thicknesses, but also avoid different The mutual doping and pollution between materials is beneficial to improve the forming quality and forming efficiency of complex parts of heterogeneous materials.

Description

A fast-switching and precise positioning device with multiple forming ports and multiple feeders

technical field

The invention belongs to the field of additive manufacturing, and in particular relates to a switching and positioning device for multiple forming ports and multiple feeders.

Background technique

Additive manufacturing is a method of manufacturing complex solid parts through layered processing and stacked forming, which can greatly shorten the manufacturing cycle of complex parts and reduce production costs.

Existing additive manufacturing equipment mainly uses a single forming port corresponding to multiple feeders or multiple forming ports corresponding to a single feeder to manufacture solid parts made of heterogeneous materials. Publication No. EP 0337468 B1, US 8570534 B1 and application publication No. CN 103692652 A respectively disclose three kinds of additive manufacturing devices in which a single forming port corresponds to multiple feeders. Each feeder is filled with different materials. Through the control The connection between different feeders and the forming port enables different materials to be discharged and formed through the forming port to realize the additive manufacturing of different materials. Since all the materials must be discharged through the same forming port, it is easy to cause material residue on the surface of the forming port during the connection transformation between the feeder and the forming port, resulting in mutual doping and pollution between different materials, and the outlet cross-section is fixed, which is difficult Meet the forming requirements of different thickness material layers. The invention with application publication number CN103612394 A discloses a high-voltage electrostatically driven printing device consisting of a single feeder and multiple variable-diameter forming ports, which can meet the forming requirements of heterogeneous material layers with different specific thicknesses, but it is still unavoidable. Mutual doping and contamination of different materials inside the feeder and at the forming port. To sum up, meeting the lamination forming requirements of heterogeneous materials with different thicknesses and avoiding mutual doping and pollution between different materials are the primary problems that need to be solved urgently in the process of high-quality and efficient additive manufacturing of complex parts of heterogeneous materials.

Contents of the invention

The present invention provides a multi-port multi-feeder fast switching and precise positioning device to solve the problem that it is difficult to meet the requirements of lamination forming of heterogeneous materials with different thicknesses, and materials are mixed with each other in the process of additive manufacturing of complex parts of heterogeneous materials, resulting in heterogeneity. The problem of low forming quality of complex parts made of high-quality materials.

The technical solution adopted by the present invention is: the support base is fixedly connected to the lower part of the connecting plate through four long bolts, the storage tank and the motor are respectively fixedly connected to the top of the connecting plate, the plane bearing is fixedly connected to the top of the support base, and the bottom of the feeding cylinder is fixedly connected to the top of the support base. It is rotatably connected with the support base, the upper part of the feeding tube is connected with the output shaft of the motor through a spline shaft, the limit switch is fixedly connected with a long bolt, and a guide frame is connected inside the feeding tube, and the feeder and the guide frame are slidingly connected. The feeder is connected to the storage barrel through the feeder tube, the top of the feeder is connected to the spring, the spring is fixedly connected to the lower part of the connecting plate, the forming mouth is fixedly connected to the lower part of the feeder, and the shoulder of the forming mouth adopts ferromagnetic Material, there is a through hole on the support base, the tapered positioning hole is fixedly connected under the through hole, the electromagnetic chuck is installed in the through hole of the support base, and a pressing block is connected to the outer edge of the top of the feeding tube. Corresponding to the installation position of the feeder.

There are 2 to 20 feeders, and each feeder is used to hold different materials.

The discharge sections of the forming openings have different sizes and different patterns.

The outside of the feeder is a square section.

The motor drives the feeding cylinder to rotate through the spline shaft, and drives the guide frame to rotate, so as to realize the rapid switching of the positions of the feeding devices with different materials. The discharge section of the forming port connected to the feeder can have different sizes and different patterns to meet the discharge requirements of different materials, different cross-sectional shapes and different cross-sectional sizes. The forming mouth with variable discharge section, the electromagnetic chuck and the support base with the tapered positioning hole constitute the positioning assembly. The inner surface of the tapered positioning hole and the tapered outer surface of the forming mouth cooperate with each other to realize the X-direction, Y-direction and Z-direction. Mobile positioning and rotation positioning around the X and Y axes.

The invention has the advantages of novel structure, meeting the lamination forming requirements of heterogeneous materials with different thicknesses, solving the material doping problem in the additive manufacturing process of complex parts of heterogeneous materials, and improving the forming quality of complex parts of heterogeneous materials. The present invention is suitable for rapid switching and precise positioning of multiple melt or liquid material feeders and forming ports in additive manufacturing equipment, which can not only meet the lamination forming requirements of heterogeneous materials with different thicknesses, but also avoid the gap between different materials. Mutual doping pollution is beneficial to improve the forming quality and forming efficiency of complex parts of heterogeneous materials.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a sectional view of the present invention;

Figure 3 (a) is a schematic diagram of the switching process of the feeding cylinder of the present invention, in which the tapered positioning hole of a feeding device is attracted by the electromagnetic sucker and is in the feeding state;

Figure 3(b) is a schematic diagram of the switching process of the feeding cylinder of the present invention, in which a feeding device is not attracted by the electromagnetic sucker and is in the state of being lifted by the tapered positioning hole;

Figure 3(c) is a schematic diagram of the switching process of the feeding cylinder of the present invention. In the figure, after the feeding device is rotated 180 degrees to the other side, another feeding device is turned around, located in the tapered positioning hole, and is in the injection state. schematic diagram;

Fig. 4(a) is a schematic diagram of a square cross-sectional shape of the forming port of the present invention;

Fig. 4 (b) is a schematic diagram of the cross-sectional shape of the forming port of the present invention as a rectangle;

Fig. 4(c) is a schematic diagram of a prismatic cross-sectional shape of the forming port of the present invention;

Figure 4(d) is a schematic diagram of a circular cross-sectional shape of the forming port of the present invention;

Fig. 4(e) is a schematic diagram of an elliptical cross-sectional shape of the forming port of the present invention;

Figure 4(f) is a schematic diagram of the cross-sectional shape of the forming port of the present invention being the intersection of two oblong circles;

Fig. 4 (g) is a schematic diagram of a triangular cross-sectional shape of the forming port of the present invention;

Fig. 4 (h) is a schematic diagram of a pentagonal cross-sectional shape of the forming port of the present invention;

Fig. 4 (i) is a schematic diagram of a hexagonal cross-sectional shape of the forming port of the present invention;

Fig. 4 (j) is a schematic diagram of the cross-sectional shape of the forming port of the present invention as a grid shape;

Fig. 4(k) is a schematic diagram showing that the shape of the cross-section of the forming port of the present invention is circular;

Fig. 4(l) is a schematic diagram of the cross-sectional shape of the forming port of the present invention as a combined figure.

detailed description

The support base 1 is fixedly connected to the lower part of the connecting plate 6 through 4 long bolts 11, the material storage cylinder 7 and the motor 8 are respectively fixedly connected to the upper part of the connecting plate 6, the plane bearing 2 is fixedly connected to the upper part of the supporting base 1, and the lower part of the feeding cylinder 3 passes through the plane The bearing 2 is rotationally connected with the support base 1, the upper part of the feeding tube 3 is connected with the output shaft of the motor 8 through the spline shaft 5, the travel switch 10 is fixedly connected with a long bolt 11, and a guide frame 14 is connected inside the feeding tube 3. The feeder 15 is slidably connected with the guide frame 14, and the feeder is connected with the storage barrel 7 through the feeding pipe 9, and the top of the feeder is connected with the spring 16, and the spring 16 is fixedly connected with the bottom of the connecting plate 6, and the forming mouth 13 is fixedly connected with the lower part of the feeder 15, the shoulder 1301 of the forming mouth 13 is made of ferromagnetic material, and there is a through hole on the supporting base 1, and the tapered positioning hole 12 is fixedly connected under the through hole, and the electromagnetic chuck 17 is installed on the In the through hole of the support base 1 , a pressure block 4 is connected to the outer edge of the top of the feeding tube 3 , and the pressure block corresponds to the installation position of the feeder 15 .

There are 2 to 20 feeders 15, and each feeder 15 is used to hold different materials.

The discharge sections of the forming openings have different sizes and different patterns.

The outside of the feeder 15 is a square section.

The motor drives the feeding cylinder 3 through the spline shaft 5 to realize the rotation in both forward and reverse directions. Each rotation angle is determined by the fan-shaped central angle corresponding to the mutually switched feeder, and does not exceed 180°, avoiding the rotation of each feeding pipe intertwined with each other.

The outside of the feeder 15 has a square cross-section to prevent it from rotating relative to the guide frame 14. Under the action of electromagnetic force or spring restoring force, the feeder 15 can move relative to the guide frame 14 along the positive and negative directions of the Z axis.

The motor 8 is started, and the power is output to the spline shaft 5 to drive the feeder 15 to rotate. When the feeder 3 rotates to a certain angle, the briquetting block 4 corresponding to the feeder 15 presses down the travel switch to stop the motor 8 from rotating. Fast switching of different feeders 15 is realized.

The forming ports 13 installed on each feeder 15 may have different cross-sectional sizes, different cross-sectional shapes or different cross-sectional patterns. By changing the combination pattern of the forming opening 13 in the feeding barrel 3, the variable cross-section discharge of various materials is realized, and the lamination forming requirements of heterogeneous materials with different thicknesses are met. The shoulder 1301 of the forming opening 13 is made of ferromagnetic material, and the part connected with the shoulder of the forming opening 13 is designed as a tapered outer surface.

The electromagnetic chuck 17 is fixed on the support base 1. When the electromagnetic chuck 17 is energized, the generated electromagnetic suction attracts the ferromagnetic material on the shoulder of the forming port 131. Under the guidance of the tapered hole 12 and the guide frame 141, the forming port 131 drives The feeder 15 overcomes the resistance of the spring 16 and moves along the negative direction of the Z axis. After the forming mouth 13 moves in place, the tapered outer surface of the forming mouth 13 closely cooperates with the tapered positioning hole 12 of the support base 1 to realize the moving positioning in the X direction, the Y direction and the Z direction and the rotation positioning around the X and Y axes. The electromagnetic attraction between the shoulder plane of the mouth 13 and the shoulder plane of the tapered positioning hole 12 realizes the clamping of the forming mouth 13 . At this time, the forming port 13 outputs the material in the feeder 15 for additive manufacturing. When the material needs to be replaced, the electromagnetic chuck 17 loses power, and under the action of the restoring force of the spring 16, the feeder 15 drives the forming port 13 to move along the guide frame 14 in the positive direction of the Z axis and return to the initial position. By repeating the above steps, the forming of heterogeneous materials with different thicknesses can be realized. In the present invention, each feeder has a unique forming opening corresponding to it, and the tapered positioning holes 12 on the support base 1 are only used for the positioning of each forming opening 13, and are not in contact with materials during the manufacturing process, effectively avoiding the need for feeding. Material doping pollution inside the feeder 15 and at the forming port 13.

It can be seen from the above that this embodiment only records a specific structural method of switching positioning devices. For example, the above-mentioned forming mouth 13 drives the feeder 15 to move relative to the guide frame 14 along the negative direction of the Z axis under the action of electromagnetic force. It is not limited to driving by electromagnetic force, and any device capable of driving the movement of the forming port 13 falls within the protection scope of the present invention. Any skilled person within the technical scope disclosed in the present invention, the technical solutions that are equivalently replaced or changed according to the technical solutions and inventive concepts of the present invention shall fall within the protection scope of the present invention.

Claims (4)

1. A fast switching and precise positioning device with multiple forming ports and multiple feeders, characterized in that: the support base is fixedly connected to the lower part of the connecting plate through four long bolts, the storage tank and the motor are respectively fixedly connected to the upper part of the connecting plate, and the plane bearing It is fixedly connected to the top of the support base, and the bottom of the feeding tube is connected to the support base through a plane bearing. The upper part of the feeding tube is connected to the output shaft of the motor through a spline shaft. The travel switch is fixedly connected to a long bolt. The guide frame is slidingly connected with the feeder and the guide frame. The feeder is connected with the storage barrel through the feeder tube. The shoulder of the forming port is made of ferromagnetic material, and there is a through hole on the supporting base, and the tapered positioning hole is fixedly connected under the through hole. The electromagnetic chuck is installed in the through hole of the supporting base, and the feeding A pressing block is connected to the outer edge of the top of the barrel, and the pressing block corresponds to the installation position of the feeder. 2. A fast-switching and precise positioning device with multiple forming ports and multiple feeders according to claim 1, characterized in that: there are 2 to 20 feeders, and each feeder is used to hold different materials . 3. A fast-switching precise positioning device with multiple forming ports and multiple feeders according to claim 1, characterized in that: the discharge sections of the forming ports have different sizes and different patterns. 4. A fast-switching precise positioning device for multiple forming ports and multiple feeders according to claim 1, characterized in that: the outside of the feeder is a square section.