CN210098970U

CN210098970U - Grafting device of SLM equipment forming die

Info

Publication number: CN210098970U
Application number: CN201822201931.4U
Authority: CN
Inventors: 胡小全; 杜晓婷; 王延; 杨东辉; 薛蕾
Original assignee: Xian Bright Laser Technologies Co Ltd
Current assignee: Xian Bright Laser Technologies Co Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-02-21
Anticipated expiration: 2028-12-26

Abstract

The utility model discloses a SLM equipment forming die's grafting device, including the grafting substrate, grafting substrate underrun dowel and fastening screw A are fixed on the processing platform, and the grafting substrate surface is fixed at the mould base through locating hole round pin and fastening screw B. The grafting base material adopts array positioning pin holes to increase the general applicability; all the array positioning pin holes on the grafting base material integrally rotate by 5-30 degrees, so that the pretreatment difficulty of the SLM model is reduced; the grafting base material still continues to use the screw fixation mode, has reduced the grafting base material and has printed the heat altered shape that the in-process produced because of the heat transfer, has indirectly guaranteed the precision that the mould grafting was printed.

Description

Grafting device of SLM equipment forming die

Technical Field

The utility model belongs to the technical field of the vibration material disk processing, concretely relates to SLM equipment forming die's grafting device.

Background

The die is a tool for forcing metal or nonmetal forming and is essential key process assembly in industrial production. The products produced in batch by using the die have the advantages of high efficiency, high consistency, low energy consumption, high precision, high complexity and the like, so that the die is widely applied to the industries of machinery, electronics, automobiles, information and the like. The mold may be classified into a stamping mold, a plastic mold, a casting mold, a forging mold, etc. according to the processing object and the processing technique.

Traditional mould utilizes ordinary lathe or digit control machine tool to subtract material manufacturing, when facing the very complicated mould of inner structure, traditional processing mode not only cycle length, and is with high costs, receives processing technology self characteristics restriction moreover, and mould itself can not design too complicacy, if contain the runner structure of curved shape characteristic, perhaps will sacrifice the yield of certain performance or life-span under just can accomplish production, has not only reduced the yield of the mould product of producing, has also reduced the life of mould itself. In recent years, the SLM molding process-based metal 3D printing technology is gradually applied to mold manufacturing, especially in the field of injection molds, and 3D printing for the conventional mold material 18NI300 is more and more widely applied. The mould processing technology based on the SLM forming process not only enables the design thought of a mould designer to be wider, so that a high-quality mould which takes efficiency and service life into consideration is designed, but also can greatly shorten the research and development period and the processing period of the mould, further improves the overall efficiency of the whole mould industry chain, and saves time and cost.

At present, the manufacturing of molds by using a metal 3D printing technology in the market is mainly divided into two modes. One is the integral printing of the mould, namely the whole mould is printed in the full size of the processing platform of the SLM equipment; the other scheme is mould grafting printing, namely, a base with a simple structure is processed in advance by using a traditional material reducing processing mode, and then SLM equipment is used for grafting printing on the base. The scheme combining material reducing manufacturing and material increasing manufacturing effectively reduces transition dependence of die manufacturing on metal 3D printing equipment or material reducing manufacturing equipment, reduces risk of die processing, reduces processing cost of the whole die to a certain extent, and improves overall processing efficiency. However, an effective mold grafting device for a mold is not provided in the existing SLM equipment in the market at present, when a part is processed by the traditional SLM equipment, the part directly grows on a base material and the base material is finally an integral body, and the part is cut and separated by using methods such as an electric saw or wire cutting after the part is processed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a SLM equipment forming die's grafting device, after the part has printed, whole mould takes off from the grafting base plate, does not need this process of cutting separation.

The technical scheme adopted by the utility model is that the grafting device of the SLM equipment forming mould comprises a grafting base material, wherein the bottom surface of the grafting base material is fixed on a processing platform through a positioning pin and a fastening screw A, and the surface of the grafting base material is fixed on a mould base through a positioning pin and a fastening screw B; the surface of the grafting base material is provided with a plurality of positioning pin holes which are arranged in an array mode in a penetrating mode and used for placing the positioning pin holes, the cross section of each positioning pin hole along the axial direction is in a convex shape, and the whole arrangement mode of the positioning pin holes rotates 5-30 degrees relative to the central axis of the grafting base material.

The utility model is also characterized in that,

two cylindrical pin holes are formed in the edge of the surface of the grafting base material, and a positioning pin is inserted into each cylindrical pin hole.

The positioning hole pin is hollow, the sectioning surface along the axial direction is in a convex shape, and a fastening screw B penetrates through the center of the positioning hole pin to connect the grafting base material with the mold base.

Rectangular notches are further formed in two opposite side walls of the grafting base material and are used for integrally forking or forking the grafting base material.

The fastening screw A is a hexagon socket head cap screw.

The beneficial effects of the utility model are that, a SLM equipment forming die's grafting device, when comparing in traditional SLM equipment processing part, the part is direct directly grows on the substrate and the substrate is finally a whole, treats that processing accomplishes methods such as electric saw or wire-electrode cutting of recycling and cuts the separation. When the grafting device of this application processes the part, print on the mould base that has processed, the mould base is a part of whole mould, after the part has printed, whole mould takes off from the grafting base plate, does not need this process of cutting separation.

Drawings

Fig. 1 is a schematic structural diagram of a grafting device of a SLM equipment forming mold of the present invention;

fig. 2 is a cross-sectional view of a grafting device of the SLM equipment forming mold of the present invention;

FIG. 3 is a flow chart of the grafting method.

In the figure, 1 is a grafting base material, 2 is a positioning pin, 3 is a mould base, 4 is a positioning hole pin, 5 is a processing platform, 6 is a fastening screw A, 7 is a fastening screw B.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a SLM equipment forming die's grafting device, as shown in fig. 1 and fig. 2, including grafting substrate 1, grafting substrate 1 underrun dowel 2 and fastening screw A6 are fixed on processing platform 5, and grafting substrate 1 surface is fixed on mould base 3 through locating hole round pin 4 and fastening screw B7.

Two cylindrical pin holes are formed in the edge of the surface of the grafting base material 1, a positioning pin 2 is inserted into each cylindrical pin hole and used for being positioned with a machining platform 5 of SLM equipment, and other three corners of the edge of the grafting base material 1 are fixed on the machining platform 5 through fastening screws A6.

The surface of the grafting base material 1 is provided with a plurality of positioning pin holes which are arranged in an array mode in a penetrating mode and used for placing positioning hole pins 4, and the positioning pin holes are used for being connected with different die bases 3 in a positioning mode.

The section of the positioning pin hole along the axial direction is in a convex shape.

The whole arrangement mode of the positioning pin holes is rotated by 5-30 degrees relative to the central axis of the grafting base material.

The positioning hole pin 4 is hollow, the cross section of the positioning hole pin along the axial direction is in a convex shape, and a fastening screw B7 is used for connecting the grafting base material 1 and the mould base 3 through the center of the positioning hole pin 4.

Rectangular notches are further formed in two opposite side walls of the grafting base material 1 and are used for integrally forking or forking the grafting base material.

The fastening screw a6 is a socket head cap screw.

The positioning pin 2 is a common internal thread cylindrical pin, plays a positioning role and is generally taken out by a pin puller.

The die base 3 is a part of a die provided by a die maker and is generally formed by a numerical control machine.

The processing platform 5 of the SLM device is referred to as the Z-axis platform of the device and contains a number of components, typically with the uppermost layer being a heating plate or a sealing plate.

The utility model discloses a grafting method of grafting device, as shown in fig. 3, the concrete processing method includes the following steps:

step 1, installing a grafting device;

step 2, guiding the three-dimensional model of the mold base 3 of the grafting device into SLM (Selective laser melting) process pretreatment software, and subdividing the outline of the top surface of the mold base 3 by utilizing subdivision software;

step 3, paving metal powder with one layer thickness according to the requirements of a material printing process, setting SLM (selective laser melting) processing parameters, and printing a subdivision file of the die base 3;

step 4, selecting at least 3 feature points on the contour printed in the step 3, measuring the deviation of the selected feature points through a vernier caliper, calculating the offset of the contour of the mold base 3 printed by the SLM equipment relative to the top contour of the actual mold base 3 according to the obtained deviation value, and then calculating the rotation amount according to the offset;

step 5, guiding the offset and the rotation amount obtained in the step 4 into SLM process preprocessing software, re-splitting the outline of the top surface of the die base 3, repeating the steps 2-5, if the measured deviation meets the precision requirement, executing the step 6, otherwise, repeating the steps 2-5;

step 6, importing the finally calculated offset and the finally calculated rotation amount into SLM (Selective laser melting) process preprocessing software, integrally dividing a model to be printed, and performing printing operation by using SLM equipment;

step 7, after the parts are printed, taking out the positioning pin 2 by using a pin puller, then disassembling a fastening screw A6, and taking out the grafting base material 1, the mould base 3 and the printed parts by using a forklift; the positioning hole pin 4 and the fastening screw B7 connecting the grafting base material 1 and the mold base 3 are removed, and finally the necessary part post-processing is performed.

The utility model discloses a grafting device of SLM equipment forming die, array positioning pin holes are adopted on the grafting base material 1 to increase the general applicability; all the array positioning pin holes on the grafting base material rotate 5-30 degrees relative to the central axis of the grafting base material, so that the pretreatment difficulty of the SLM model is reduced; the positioning hole pin 4 has the structural characteristics of positioning and fastening functions through a screw; the two fixed cylindrical pin holes on the grafting base material 1 are arranged on the periphery of the base material, so that the problem that the grafting base material 1 cannot be disassembled because the cylindrical pin holes are covered by the mold base 3 is avoided; the grafting base material 1 still continues to use a screw fixing mode, so that the thermal deformation of the grafting base material caused by heat transfer in the printing process is reduced, and the precision of the mould grafting printing is indirectly ensured.

Through using the utility model discloses a grafting device, when comparing in traditional SLM equipment processing part, the part is direct directly to be a whole with the substrate on the substrate directly, waits to process to accomplish method cutting separation such as electric saw or wire-electrode cutting of recycling. When the grafting device of this application processes the part, print on the mould base that has processed, the mould base is a part of whole mould, after the part has printed, whole mould takes off from the grafting base plate, does not need this process of cutting separation.

Claims

1. The grafting device of the SLM equipment forming die is characterized by comprising a grafting base material (1), wherein the bottom surface of the grafting base material (1) is positioned and fixed on a processing platform (5) through a positioning pin (2) and a fastening screw A (6), and the surface of the grafting base material (1) is fixed on a die base (3) through a positioning hole pin (4) and a fastening screw B (7); the surface of the grafting base material (1) is provided with a plurality of positioning pin holes which are arranged in an array mode in a penetrating mode and used for placing the positioning hole pins (4), the section surfaces of the positioning pin holes along the axial direction are in a convex shape, and the whole arrangement mode of the positioning pin holes rotates 5-30 degrees relative to the central axis of the grafting base material (1).

2. The grafting device of the SLM device forming die as claimed in claim 1, wherein two cylindrical pin holes are formed at the edge of the surface of the grafting base material (1), and a positioning pin (2) is inserted into each cylindrical pin hole.

3. The grafting device of an SLM device forming mold according to claim 1, wherein the locating hole pin (4) is hollow inside and the cross section along the axial direction is in a shape of 'convex' for the fastening screw B (7) passing through the center of the locating hole pin (4) to connect the grafting base material (1) and the mold base (3).

4. The grafting device of the SLM device forming die of claim 1, characterized in that the grafting base material (1) is further provided with rectangular notches on two opposite side walls for integral forking or forking of the grafting base material.

5. The grafting apparatus of the SLM device forming die of claim 1, characterized in that the fastening screw a (6) is a socket head cap screw.