CN111545705A

CN111545705A - Printing and cutting integrated forming device for large sand mold

Info

Publication number: CN111545705A
Application number: CN201911423580.4A
Authority: CN
Inventors: 刘丰; 单忠德; 杨高阳; 郭智; 杨金刚
Original assignee: Beijing Jike Guochuang Lightweight Science Research Institute Co Ltd
Current assignee: Beijing Jike Guochuang Lightweight Science Research Institute Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-18
Anticipated expiration: 2039-12-31
Also published as: CN111545705B

Abstract

The invention relates to a large sand mold printing and cutting integrated forming device, and belongs to the technical field of crossing of casting and rapid forming. The device mainly includes: the base, with pedestal connection and can with the relative pivoted revolving stage of base, the horizontal axis with revolving stage fixed connection, the horizontal slip table that can move on the horizontal axis, the perpendicular slip table with horizontal slip table fixed connection, the Z1 axle that can go up and down along the vertical direction with perpendicular slip table connection, fix sanding device and printing device at Z1 axle lower extreme, the horizontal slip table that can move on the horizontal axis, the perpendicular slip table with horizontal slip table fixed connection, the Z2 axle that can go up and down along the vertical direction with perpendicular slip table connection, fix the cutting device at Z2 axle lower extreme. The large sand mold printing and cutting integrated forming device provided by the invention occupies a small space, is suitable for large sand mold manufacturing, can realize cooperative manufacturing of multiple devices, and has the advantages of digitalization, high flexibility, high precision and the like in the forming process.

Description

Printing and cutting integrated forming device for large sand mold

Technical Field

The invention relates to a large sand mold printing and cutting integrated forming device, and belongs to the technical field of crossing of casting and additive manufacturing.

Background

The digital sand mold 3D printing technology and the sand mold cutting processing technology both belong to the sand mold non-mold rapid manufacturing technology, can realize the rapid manufacturing of a wood-free mold or a metal mold for casting a sand mold, and are particularly suitable for the manufacturing of single-piece and small-batch sand molds and the research and development and personalized customization of new products. At present, the 3D sand mold printing equipment mainly comprises a sand mixing device, a sand paving device, an ink-jet printing device, a lifting platform, a control system and the like, wherein a printing nozzle is adopted to selectively spray a binder to pave, print and form layer by layer in a closed forming chamber, the layer thickness control is realized by lifting the printing platform, and finally the layer-by-layer additive manufacturing of the sand mold is completed. The sand mold cutting and processing equipment mainly comprises a three-axis or five-axis motion system, an electric main shaft, a special cutter, a sand discharge device and the like, and the sand mold is subjected to numerical control cutting and processing and forming in a closed forming space.

However, the existing sand mold 3D printing equipment and sand mold cutting processing equipment have the following defects in the manufacturing process of the large casting sand mold:

(1) the existing sand mold ink-jet printing equipment adopts the lifting of the platform to realize the control of the thickness of the printing layer, is suitable for the printing of medium and small sand molds, and has the problems of synchronous control, large carrying capacity and the like in the lifting of a large-size printing platform.

(2) Present sand mould 3D printing apparatus generally only is equipped with one set of sanding device to the printing of single sand mould is given first place to, is difficult to realize the printing of multiple molding sand, and in addition, the shower nozzle that adopts the inkjet to print all has special requirements to the viscosity of resin and surface tension etc. need adopt special resin.

(3) The existing sand mould cutting processing equipment adopts a gantry machine tool structure, so that the occupied area is large, and the loading and unloading are difficult in large sand mould processing.

Disclosure of Invention

Aiming at the problems of equipment in the conventional single-piece small-batch large sand mold rapid manufacturing process, the invention provides a large sand mold printing and cutting integrated forming device.

The large sand mold printing and cutting integrated forming device combines a sand paving device, a printing device and a cutting device, and the sand paving device, the printing device and the cutting device are arranged on a group of cantilever structures consisting of a rotary table, a horizontal sliding table and a vertical sliding table, so that sand mold printing and cutting in an open space can be realized. The sand paving device, the printing device and the cutting device can be lifted through the movement of the cantilever structure, so that the difficulty of platform lifting and sand mold taking out is avoided; the device can utilize the characteristics that the occupied space is small and multiple devices are supported to cooperatively operate, or the design of a plurality of groups of sand mixing devices and a plurality of sand paving openings is adopted to realize the manufacture of the multi-material sand mold; the device carries out integrated combination to sand mould printing and sand mould cutting, prints and makes the sand mould idiosome according to the needs of sand mould cutting, has practiced thrift the consumption of raw and other materials and the time of cutting process.

In order to achieve the purpose, the sand mold printing and cutting integrated device mainly comprises: the base, with pedestal connection and can with the relative pivoted revolving stage of base, the horizontal axis with revolving stage fixed connection, the horizontal slip table that can move on the horizontal axis, the perpendicular slip table with horizontal slip table fixed connection, the Z1 axle that can go up and down along the vertical direction with perpendicular slip table connection, fix sanding device and printing device at Z1 axle lower extreme, the horizontal slip table that can move on the horizontal axis, the perpendicular slip table with horizontal slip table fixed connection, the Z2 axle that can go up and down along the vertical direction with perpendicular slip table connection, fix the cutting device at Z2 axle lower extreme.

The Z axis of the large sand mold printing and cutting integrated forming device can be a rigid axis or a flexible axis consisting of steel wire ropes.

A sand paving device, a spraying device and a cutting device of a large sand mould printing and cutting integrated forming device can move in pairs to avoid interference with a formed sand mould part.

A sanding device, a printing device and a cutting device of a large sand mold printing and cutting integrated forming device can be fixed on the same Z axis and can also be respectively fixed on different Z axes.

A sand paving device of a large sand mould printing and cutting integrated forming device can be provided with one or more sand paving heads to realize the laying of one kind of sand or a plurality of kinds of sand.

A sand paving device of a large sand mould printing and cutting integrated forming device can be connected with a continuous sand mixer.

A sand paving device of a large sand mould printing and cutting integrated forming device can be connected with a pneumatic sand feeding device.

The jetting device of the large sand mold printing and cutting integrated forming device can be an ink jet printing device or a gas jetting device.

The cutting device of the large sand mold printing and cutting integrated forming device can be an electric spindle.

The large sand mold printing and cutting integrated forming device adopting the design has the following advantages:

1. the design that the printing platform is replaced by the design that the sanding device and the printing device are lifted to drive the printed sand mold to integrally lift is adopted, so that the difficulty of lifting the sand mold in the manufacturing process of large or ultra-large sand molds is eliminated.

2. The method can realize the cooperative work of multiple devices and the manufacture of the multi-material sand mold, and has low requirements on molding material process, high forming flexibility and low manufacturing cost.

3. The method adopts a material increasing and decreasing composite mode, and lays the molding sand as required, so that the waste of large-scale sand mold cutting materials is reduced, the time required by the large-scale sand mold cutting is shortened, and the method is green and efficient.

Drawings

The features of this patent are further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic perspective view of a large sand mold printing and cutting integrated forming device;

FIG. 2 is a schematic top view of a large sand mold printing and cutting integrated forming device;

FIG. 3 is a schematic diagram of a sanding path of a sanding step in a sand mold manufacturing process;

FIG. 4 is a schematic view of the radial horizontal movement of the sanding device during sand mold manufacturing;

FIG. 5 is a schematic diagram of the reciprocal sanding in the sanding step in the sand mold manufacturing process;

FIG. 6 is a schematic diagram of the sand laying device and the printing device being moved into a safe position and the cutting device being moved into a working position during the sand mold manufacturing process;

in the above figures, the reference numerals have the following meanings:

1-a base; 2-a turntable; 3-horizontal axis; 4-horizontal sliding table; 5-vertical sliding table; 6-Z axis; 7-a sand paving device; 8-a printing device; 9-horizontal sliding table; 10-vertical slipway; 11-Z axis; 12-a cutting device; 13-sand already laid.

Detailed Description

Referring to the attached

drawings

1 and 2, the sand printing and cutting integrated device for manufacturing the large sand mold mainly comprises: a base 1, a rotary table 2 connected with the base 1 and capable of relatively rotating above the base, the rotary table 2 is driven by a servo motor to rotate for accurate rotation positioning, a horizontal shaft 3 fixedly connected with the rotary table 2, a horizontal sliding table 4 capable of moving at one side of the horizontal shaft 3, the horizontal sliding table 4 is driven by a gear and a rack arranged on the horizontal shaft 3 and driven by the servo motor, a vertical sliding table 5 fixedly connected with the horizontal sliding table 4, a Z1 shaft 6 connected with the vertical sliding table 5 and capable of lifting along the vertical direction, the vertical sliding table 5 is driven by the servo motor to drive the gear and the rack to lift the Z1 shaft 6, a sanding device 7 and a printing device 8 fixed at the lower end of the Z1 shaft 6, the sanding device 7 is provided with two sanding ports A and a sanding port B respectively connected with a sand feeding device and capable of sanding respectively, the printing device 8 is provided with an array type printing nozzle, a structure for relative lifting is arranged between the sanding device 7 and the printing device 8, realize printing device 8's relative lift through cylinder control, can be at the horizontal slip table 9 that horizontal axis 3 opposite side removed, horizontal slip table 9 is driven by servo motor and is installed gear and rack drive on horizontal axis 3, with horizontal slip table 9 fixed connection's perpendicular slip table 10, Z2 axle 11 that can follow the vertical direction lift with being connected with perpendicular slip table 10, perpendicular slip table 5 is driven gear and rack drive by servo motor, realize the lift of Z2 axle 11, fix at the cutting device 12 of Z2 axle 11 lower extreme, cutting device 12 adopts electric main shaft and special tool.

In the process of sand paving or printing in sand mold manufacturing, firstly, the horizontal sliding table 9 and the vertical sliding table 10 move, and the cutting device 12 is moved to a near-axis safety position to avoid interference on a sand mold to be printed; a servo motor drives the rotary table 2 and the horizontal sliding table 4 on the horizontal shaft 3, the vertical sliding table 5 drives the Z shaft 6, the three shafts drive the sand spreading device 7 and the printing device 8 to move to the working initial positions shown in figure 3, and the printing device 8 is lifted by the air cylinder, so that the interference on a sand spreading layer to be carried out is avoided; then, filling molding sand which is not mixed with a curing agent into a sanding head A and a sanding head B of a sanding device 7 by a sand conveying device, driving the sanding device 7 to move by three shafts, controlling the sanding head A of the sanding device 7 to lay a layer of bottom sand in a forming work area along the path of the sanding head A as shown in figure 3, then moving a horizontal sliding table by a distance of the total width of the sanding as shown in figure 4, sanding again as shown in figure 5, and repeating the steps until the bottom sand is laid; then the Z-axis 6 is lifted upwards to the height of the thickness of the bottom sand to be laid, the sand conveying device respectively loads molding sand premixed with curing agents into a sand laying head A and a sand laying head B of the sand laying device 7 according to the information of the current layer slice, the sand laying device 7 is driven to move by three axes, the sand laying head A of the sand laying device 7 is controlled to carry out sand laying along the path of the sand laying head A, the sand laying head B carries out sand laying along the path of the sand laying head B, a layer of molding sand is laid in a forming work area, then the horizontal sliding table 4 moves for a distance of the total width of the sand laying, the sand laying is carried out again, and the steps are repeated until the laying of the current layer of molding sand is; then the Z axis rises by the height of the thickness of a sanding layer, the printing device 8 is lowered to the printing position by the air cylinder, the three axes drive the printing device 8 to move, the printing device 8 is controlled to spray the binder in the forming work area, then the horizontal sliding table 4 moves by the distance of the total width of the sanding layer, the binder is sprayed again, and the steps are repeated until the printing of the current layer of the graph is finished; repeating the above steps, sanding, printing and stacking layer by layer until a sand mould blank to be cut with a certain thickness is completed, driving the sanding device 7 and the printing device 8 to enter a near-axis safety position by the horizontal sliding table 4, and driving the cutting device 12 to enter a far-end working position by the horizontal sliding table 9, as shown in fig. 6; the three-axis driving cutting device 12 carries out cutting processing on the current sand mold blank; and repeating the processing steps until the sand mold is finished.

The above embodiments are only examples, and the embodiments of the large sand printing and cutting integrated forming device described in this patent are described without limiting the concept and scope of this patent, and those skilled in the art should be able to replace various equivalent features of the large sand printing and cutting integrated forming device to which this patent belongs without departing from the device idea described in this patent, and all that falls within the protection scope of this patent.

Claims

1. A sand mould printing cutting integrated device for large-scale sand mould manufacturing mainly includes: the base 1, with the base connection and can with the relative pivoted revolving stage 2 of base, horizontal axis 3 with revolving stage fixed connection, can follow horizontal axis 3 one side movable horizontal slip table 4, with horizontal slip table 4 fixed connection's vertical slip table 5, be connected with vertical slip table 5 and can follow the Z1 axle 6 of vertical direction lift, fix sanding device 7 and printing device 8 at Z1 axle 6 lower extreme, can follow horizontal slip table 9 of horizontal axis 3 opposite side removal, vertical slip table 10 with horizontal slip table 9 fixed connection, be connected with vertical slip table 10 and can follow the Z2 axle 11 of vertical direction lift, fix cutting device 12 at Z2 axle 11 lower extreme.

2. The Z1 axis 6 and Z2 axis 11 of patent claim 1 may be rigid axes or flexible axes made of steel cables.

3. The sanding device 7, the spraying device 8 and the cutting device 12 according to patent claim 1 are relatively movable to avoid interference with the formed sand mould parts.

4. The sanding device 7, the printing device 8 and the cutting device 12 according to patent claim 1 can be fixed on the same Z-axis or on different Z-axes, i.e. the Z1 axis 6 and the Z2 axis 11.

5. The sanding device 7 of patent claim 1 can have one or more sanding heads to effect the laying of sand or sands.

6. The sanding device 7 of patent claim 1 can be connected to a continuous mixer.

7. The sanding device 7 of patent claim 1 can be connected to a pneumatic sand feeder.

8. The printing device 8 according to claim 1 may be an ink jet printing device or a gas jet device.

9. The cutting device 12 of patent claim 1 may be an electric spindle.