CN210336915U

CN210336915U - Processing center FDM prints shower nozzle

Info

Publication number: CN210336915U
Application number: CN201921104076.3U
Authority: CN
Inventors: 高阳; 杨朝航; 朱德馨; 杨伟
Original assignee: North Minzu University
Current assignee: North Minzu University
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-17
Anticipated expiration: 2029-07-15

Abstract

The utility model provides a machining center FDM prints shower nozzle, belongs to and equips manufacturing technical field, including coupling mechanism, extruding means, ejection mechanism, coupling mechanism includes blind rivet and handle of a knife, blind rivet and handle of a knife threaded connection, the inside cavity that sets up of handle of a knife, extrusion mechanism vertical set up in the inside cavity of handle of a knife, ejection mechanism can dismantle with the handle of a knife lower part and be connected, makes granular material fall into the blanking ring from the blind rivet cavity, in the rotatory granular material area hopper that will go up the blanking ring from top to bottom through servo motor drive screw, wait to heat the piece and melt the back with granular material and extrude by the nozzle and can realize printing fast. Through reequiping traditional FDM printing nozzle, except can realizing traditional industry printing operation, still can borrow the handle of a knife, will print the shower nozzle and install on the machining center main shaft, realize freely switching over the cutter the same with conventional milling machine, reduced the error that machining center cutter secondary location brought, improved the speed and the precision of part manufacturing.

Description

Processing center FDM prints shower nozzle

Technical Field

The utility model belongs to the technical field of the equipment is made, concretely relates to shower nozzle is printed to machining center FDM.

Background

The material-increasing and material-reducing combined machining technology is a new technology which combines product design, software control, material-increasing manufacturing (3D printing) and material-reducing manufacturing (numerical control machine tool). Therefore, the machining of addition and subtraction can be realized on the same machine tool, and the method is a hybrid manufacturing technology combining the conventional numerical control cutting machining and 3D printing.

FDM (fused deposition technology) as additive processing is one of the mainstream technologies of 3D printing, and it uses the hot melting and adhesion of thermoplastic material (ABS or PLA, etc.) to heat the thermoplastic material into molten state in a printing nozzle, and the nozzle moves along the cross-section profile and filling track of the part, and at the same time, the molten material is extruded, and the material is rapidly solidified and molded.

The material increasing and decreasing integrated machine based on the FDM principle can well control the advantages and the disadvantages of material increasing and decreasing manufacturing, but the material increasing and decreasing integrated machine is separated from a machining center of a machine tool by a printing nozzle, namely a 3D printer spindle is independently designed on the machining center, and a workpiece is machined by using a machining platform. After the 3D printing of the finished parts is finished, the machining center calls a proper cutter from the cutter library as required to be installed on the main shaft to machine the parts in the rest procedures, and then the machining and manufacturing of the whole parts are finished.

The printing nozzle and the printing tray need to be aligned and the coordinate system needs to be reset before 3D printing, and parts need to be clamped, positioned and set before the machining center spindle of the material reducing process works.

Disclosure of Invention

The invention aims to solve the technical problem that no printing cutter which can realize common printing operation and can be matched with a main shaft of a machining center and be directly installed on the main shaft of the machining center exists at present, so that an FDM printing spray head of the machining center is needed to be provided.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a machining center FDM prints shower nozzle, includes coupling mechanism, extruding means, ejection mechanism, coupling mechanism includes blind rivet and handle of a knife, and the blind rivet is the hollow piece of column, blind rivet and handle of a knife threaded connection, the inside cavity that sets up of handle of a knife, the extruding means vertical set up in the inside cavity of handle of a knife, ejection mechanism can dismantle with handle of a knife lower part and be connected, coupling mechanism and extrusion mechanism and ejection mechanism butt joint form the cavity of carrying the material.

Preferably, the extruding mechanism comprises a motor, a coupler, a rotary screw, an upper blanking ring, a lower blanking ring and a bearing, the motor is connected with the rotary screw through the coupler so as to drive the rotary screw to rotate, the upper blanking ring and the lower blanking ring are in interference fit with the motor and the bearing respectively, and the peripheries of the upper blanking ring and the lower blanking ring are connected with the inner cavity of the cutter handle through threads so as to fix and support the extruding mechanism.

Preferably, the blanking ring is arranged to be of a disc-shaped hollow structure so that the material can fall down conveniently.

Preferably, the diameter of the lower end of the rotating screw is larger than that of the upper end.

Preferably, the ejection mechanism includes hopper, fixed end cover, teflon pipe, choke, heating piece and nozzle, the hopper sets up under the blanking ring, and the hopper is hourglass hopper-shaped structure, hopper feed inlet one end with handle of a knife lower part opening part fixed connection, fixed end cover outer wall set up supply fixed end cover with the through-hole that hopper and handle of a knife are connected to with fixed end cover with hopper and handle of a knife fixed connection.

Preferably, the Teflon tube is a hollow part with an upper opening and a lower opening, a supporting plate is arranged at one end of the Teflon tube and fixedly connected with the lower part of the fixed end cover, the other end of the Teflon tube is connected with the throat tube, the inner diameter of the Teflon tube is larger than the outer diameter of the rotary screw rod, and radiating fins are uniformly arranged on the outer wall of the Teflon tube.

Preferably, the heating block is of a rotary gyro type, the center of the heating block is provided with a hole, the upper part of the heating block is connected with the throat pipe, and the lower part of the heating block is connected with the nozzle.

Preferably, a plurality of resistance-shaped heating rod grooves are further formed in the outer wall of the heating block.

The utility model adopts the above technical scheme, its beneficial effect lies in: the printing nozzle is designed and modified by the existing FDM, the connecting mechanism matched with the machining center spindle is added, the improved printing nozzle is combined with the connecting mechanism, so that printed materials can enter a material cavity channel from a machine tool spindle through a connecting piece of the machining center FDM printing nozzle, and finally are melted and sprayed out through heating.

The FDM printing nozzle of the machining center can be used for realizing traditional printing operation, and can be mounted on a main shaft of the machining center by means of a cutter handle, so that the cutter can be freely switched as a conventional milling machine, material increase and material reduction manufacturing of the machining center is realized, errors caused by secondary positioning of the cutter of the machining center are reduced, and the speed and the precision of part manufacturing are improved.

Drawings

Fig. 1 is a schematic structural diagram of a FDM printing nozzle in a machining center.

Fig. 2 is a schematic structural view of the blanking ring.

In the figure: the device comprises a connecting mechanism 10, a rivet 11, a knife handle 12, an extrusion mechanism 20, a motor 21, an upper blanking ring 22, a lower blanking ring 23, a coupler 24, a bearing 25, a rotary screw 26, a spraying mechanism 30, a hopper 31, a fixed end cover 32, a Teflon pipe 33, a heating block 34, a throat pipe 35 and a nozzle 36.

Detailed Description

Combine the attached drawing of the utility model to explain the technical scheme of the embodiment of the utility model in further detail.

Please refer to fig. 1, the embodiment of the utility model provides a machining center FDM prints shower nozzle, including coupling mechanism, extruding means, blowout mechanism, coupling mechanism includes blind rivet and handle of a knife, and the blind rivet is the hollow piece of column, blind rivet and handle of a knife threaded connection, the inside cavity that sets up of handle of a knife, extruding means vertical set up in the inside cavity of handle of a knife, blowout mechanism can dismantle with the handle of a knife lower part and be connected. The utility model discloses a shower nozzle is printed to machining center FDM, the shower nozzle handle of a knife is connected with the machining center main shaft, and coupling mechanism, extrusion mechanism and the vertical connection of blowout mechanism form a passageway that supplies the material whereabouts, and granular material falls into the blanking ring down by the blind rivet cavity, and in the rotatory granular material area feeding hopper that will go up the blanking ring down of servo motor drive screw, the heating piece of treating the choke lower part melts granular material and extrudes by the nozzle after the molten state and can realize printing fast.

Milling based on FDM principle is beaten all-in-one, and milling process center possess own cutter storehouse, can snatch required cutter automatically according to system's requirement and mill work, the utility model discloses a this kind print the shower nozzle to a section milling process center and a series of printing shower nozzle that designs, except realizing general printing operation, still must satisfy the task of freely switching over the cutter with other conventional milling machine cutters. Namely the utility model discloses a machining center FDM prints the shower nozzle and can carry out the vibration material disk on the main shaft of machining center through coupling mechanism direct mount and print, prints and switches from the main shaft after accomplishing, and the main shaft can continue to call other cutters.

Further, the extrusion mechanism comprises a motor, a coupler, a rotating screw, an upper blanking ring, a lower blanking ring and a bearing, the motor is connected with the extrusion screw through the coupler to drive the screw to rotate, the upper blanking ring and the lower blanking ring are in interference fit with the motor and the bearing respectively, and the peripheries of the upper blanking ring and the lower blanking ring are connected with the inner cavity of the cutter handle through threads to fix and support the extrusion mechanism. Screw extrusion device is selected for use to extrusion mechanism, what this design mainly considered is the printing of granule melting material, and the problem that pressure is little can be overcome in the screw extrusion pay-off, and the rotatory screw rod that its relied on and the effort of other granules in the screw rod extrude the granule, and can form great axial force, just the lower extreme diameter of rotatory screw rod is greater than the upper end diameter, can make like this from the feeding channel down the granule material flow more less, can not produce the granule material too much, the phenomenon of jam nozzle after melting.

Further, the blanking ring is disc-shaped and is arranged to be a hollow structure, so that materials can fall down conveniently, particle materials fall into the blanking ring from the cavity of the tool holder along with the rotation of the motor driving the rotating screw, and the hollow structure which is irregularly arranged is beneficial to the falling of the materials.

Further, the ejection mechanism comprises a hopper, a fixed end cover, a teflon pipe, a throat pipe, a heating block and a nozzle, the hopper is arranged under the blanking ring and is of a funnel-shaped structure, one end of a hopper feeding port is fixedly connected with an opening at the lower part of the knife handle, and a through hole for connecting the fixed end cover with the hopper and the knife handle is formed in the outer wall of the fixed end cover so as to fixedly connect the fixed end cover with the hopper and the knife handle. The hopper is used as a part for feeding and temporarily storing the particles, the axis of the rotating screw is required to be as coincident with the rotating axis of the hopper as possible, and the particles on the periphery are driven to rotate under the rotating action of the screw.

Further, the teflon pipe is the hollow part of upper and lower open-ended, and one end sets up the backup pad, with fixed end cover lower part fixed connection, the other end and choke connection, the internal diameter of teflon pipe is greater than the external diameter of rotatory screw rod to make the material can reach the choke through the teflon pipe, avoid in the granule transportation process because of the heat conduction of heating block leads to the granule just to take place to melt among the teflon pipe and influence the transport, the teflon pipe outer wall evenly sets up radiating fin, sets up radiating fin and can increase the heat radiating area of teflon pipe.

Furthermore, the heating block is of a rotary gyro type, the center of the heating block is provided with a hole, and the heating block is an aluminum block with better heat conduction performance and is in threaded connection with the throat pipe. The heating block is of the rotary gyro type in order to enable the particulate material to be heated uniformly. The heating block is provided with a hole in the center, the upper part of the heating block is connected with the throat pipe, and the lower part of the heating block is connected with the nozzle to form a channel for ejecting the material.

Furthermore, a plurality of resistance-shaped heating rod grooves are formed in the outer wall of the heating block to assist the heating block in heating.

The utility model discloses a coupling mechanism is responsible for and machining center's main shaft looks adaptation to guarantee that the granular material in the main shaft passes through the blind rivet and gets into the handle of a knife, heat through extrusion mechanism arrival ejection mechanism and melt the back blowout, consider that the design space of handle of a knife is limited in the connecting piece, and extrusion mechanism's part mainly has motor, shaft coupling, rotatory screw rod, goes up blanking ring, bearing, so according to the characteristics of cutter, whole extrusion mechanism, ejection mechanism and connecting piece adopt the method of vertical installation. The utility model discloses modified handle of a knife model is mainly BT40 handle of a knife.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a shower nozzle is printed to machining center FDM which characterized in that: the rivet is a cylindrical hollow part, the rivet is in threaded connection with the handle, a cavity is formed inside the handle, the extruding mechanism is vertically arranged in the cavity inside the handle, the ejecting mechanism is detachably connected with the lower portion of the handle, and the connecting mechanism, the extruding mechanism and the ejecting mechanism are in butt joint to form a cavity for conveying materials.

2. The machining center FDM print head of claim 1 wherein: the extruding mechanism comprises a motor, a coupler, a rotary screw, an upper blanking ring, a lower blanking ring and a bearing, wherein the motor is connected with the rotary screw through the coupler so as to drive the rotary screw to rotate, the upper blanking ring and the lower blanking ring are in interference fit with the motor and the bearing respectively, and the peripheries of the upper blanking ring and the lower blanking ring are both connected with the inner cavity of the cutter handle through threads so as to fix and support the extruding mechanism.

3. The machining center FDM print head of claim 2 wherein: the blanking ring is arranged to be of a disc-shaped hollow structure so that materials can fall conveniently.

4. The machining center FDM print head of claim 2 wherein: the diameter of the lower end of the rotating screw is slightly larger than that of the upper end of the rotating screw.

5. The machining center FDM print head of claim 1 wherein: the ejection mechanism comprises a hopper, a fixed end cover, a Teflon pipe, a throat pipe, a heating block and a nozzle, wherein the hopper is arranged under the blanking ring and is of a funnel-shaped structure, one end of a hopper feed port is fixedly connected with an opening at the lower part of the knife handle, and a through hole for connecting the fixed end cover with the hopper and the knife handle is formed in the outer wall of the fixed end cover so as to fixedly connect the fixed end cover with the hopper and the knife handle.

6. The machining center FDM print head of claim 5 wherein: the Teflon tube is a hollow part with an upper opening and a lower opening, a supporting plate is arranged at one end of the Teflon tube and fixedly connected with the lower part of the fixed end cover, the other end of the Teflon tube is connected with the throat tube, and radiating fins are uniformly arranged on the outer wall of the Teflon tube.

7. The machining center FDM print head of claim 5 wherein: the heating block is of a rotary gyro type, the center of the heating block is provided with a hole, the upper part of the heating block is connected with the throat pipe, and the lower part of the heating block is connected with the nozzle.

8. The machining center FDM print head of claim 5 wherein: and the outer wall of the heating block is also provided with a plurality of resistance-shaped heating rod grooves.