Substrate clamping device of large equipment for selective laser sintering

Abstract

A substrate clamping device of large equipment for selective laser sintering comprises a bottom plate, a first triangular frame, a second triangular frame and at least two transverse rods, and the first triangular frame and the second triangular frame are vertically arranged at the two ends of the bottom plate respectively in parallel. The at least two cross rods are sequentially and fixedly arranged between the first triangular frame and the second triangular frame at intervals from top to bottom or from bottom to top; a plurality of first bolt holes are formed in the at least two cross rods, a plurality of second bolt holes corresponding to the first bolt holes are formed in the back face, away from a printing workpiece, of the base plate, and the first bolt holes and the corresponding second bolt holes are connected in a fastened mode through bolts so that the base plate can be fixedly connected with the cross rods. And the at least two cross rods are channel steel. The substrate clamping device can stably clamp the substrate, so that the substrate can be safely moved and linearly cut, and the substrate clamping device is simple in structure and good in rigidity.

Description

TECHNICAL FIELD

[0001] The utility model belongs to additive manufacturing technical field, concretely relates to a substrate clamping device of large -scale equipment for selective laser sintering. BACKGROUND

[0002] Additive manufacturing technology is a kind of rapid manufacturing technology that is formed three-dimensional object by controlling laser to scan layer by layer.Additive manufacturing technology is one of the technologies, and its process flow is as follows: first, the three-dimensional model of workpiece is sliced, and the cross section information of each layer of workpiece is obtained;Powder material is evenly spread on the surface of the work platform, and the laser is selectively melted according to the system instruction;After a cross section is completed, a new layer of material is spread, and selective scanning is continued according to the cross section information corresponding to the three-dimensional object;According to the method, the next cross section is spread and scanned, and finally the three-dimensional object is obtained.

[0003] With the deepening and scaling of selective laser sintering industry application, large size has been an important direction of metal additive manufacturing equipment development, and more and more large metal 3D printing equipment has appeared in recent years, especially the super large equipment used in aerospace field in the past two years, the forming size can reach 1520mm, which will promote the research and development of domestic additive manufacturing equipment, and the larger forming size can significantly expand the application range of metal additive manufacturing technology, solve the difficulties and pain points in the traditional manufacturing process of large size complex components, and also realize the batch production of small and medium size complex components, provide short process, digital, quality controllable advanced solution. However, due to the large structure size of large equipment, new problems also appear in the preparation and processing stage before and after printing, such as that the workpiece is directly printed on the substrate during 3D printing, and the workpiece and the substrate are connected together as a whole after printing, and we need to separate the workpiece and the substrate, at present, the workpiece is generally cut from the substrate by wire cutting, but the substrate size required by large equipment is also very large, such as the equipment with forming size of 1520mm, the substrate diameter is also 1510mm, the thickness is 150mm, the material is 45#, and the overall weight can reach 2.1t, so large size and weight will become a problem in the process of online cutting. If the substrate clamping is unstable, there is a risk of loosening or falling during online cutting, which may cause damage to the printed workpiece, or even safety accidents. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems existing in the prior art, the utility model provides a substrate clamping device of large -scale equipment for selective laser sintering, which can stably clamp the substrate, so that the substrate can be safely moved and wire cut, and the structure is simple and rigid.

[0005] To achieve the above object, the utility model provides a substrate clamping device of large -scale equipment for selective laser sintering, it includes bottom plate, first triangle frame, second triangle frame and at least two cross bars, first triangle frame and second triangle frame are respectively vertical and parallel and set up in both end parts of bottom plate, at least two cross bars are fixed and set up between first triangle frame and second triangle frame from top to bottom or from bottom to top interval, a plurality of first bolt holes are set up on at least two cross bars, the back surface of substrate is set up a plurality of second bolt holes corresponding with first bolt hole away from printing workpiece, and the fixed connection of substrate and cross bar is realized through the fastening connection of first bolt hole and corresponding second bolt hole, at least two cross bars are channel steel.

[0006] As a further preferred embodiment of the utility model, the first triangle frame and the second triangle frame are respectively welded to the bottom plate; the first triangle frame and the second triangle frame are respectively welded to the cross bar.

[0007] As a further preferred embodiment of the utility model, the first triangle frame, the second triangle frame and the bottom plate are all channel steel, and the specification of the channel steel is 80x80x10mm.

[0008] As a further preferred embodiment of the utility model, the shape of the substrate is square or circular.

[0009] As a further preferred embodiment of the utility model, the bottom plate is a hollow structure.

[0010] As a further preferred embodiment of the utility model, the substrate clamping device further comprises two jackscrew holes, the jackscrew holes are set up on the substrate for positioning and calibrating the substrate.

[0011] As a further preferred embodiment of the utility model, the number of cross bars is three, which are parallel to each other and uniformly located above the bottom plate for fixedly connecting the substrate.

[0012] As a further preferred embodiment of the utility model, the diameter of the first bolt hole and the second bolt hole is 16mm.

[0013] As a further preferred embodiment of the utility model, the bottom plate is rectangular.

[0014] As a further preferred embodiment of the utility model, when the diameter of the substrate is 1510mm, the size of the bottom plate is 1800x500x10mm.

[0015] The utility model discloses a base plate clamping device of large -scale equipment for selective laser sintering, through including bottom plate, first triangle frame, second triangle frame and at least two cross bars, first triangle frame and second triangle frame are respectively set up in the both ends of bottom plate vertically and in parallel, at least two cross bars are fixedly set between first triangle frame and second triangle frame from top to bottom or from bottom to top in sequence, a plurality of first bolt holes are set up on at least two cross bars, the back of the base plate is set up with a plurality of second bolt holes corresponding with first bolt hole away from printing workpiece, and the fixed connection of first bolt hole and corresponding second bolt hole is realized through the fastening connection of bolt to realize the fixed connection of base plate and cross bar, at least two cross bars are channel steel, so that the base plate clamping device of the utility model can stably clamp the base plate, so that the base plate can safely move and linear cutting work, and the structure is simple, and the rigidity is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the structure schematic diagram that the utility model provides base plate clamping device of large -scale equipment for selective laser sintering;

[0017] Figure 2 It is another perspective view of the structure schematic diagram that the utility model provides base plate clamping device of large -scale equipment for selective laser sintering;

[0018] Figure 3 It is the working state diagram of an embodiment that the utility model provides base plate clamping device of large -scale equipment for selective laser sintering;

[0019] Figure 4 It is the vertical swing of the base plate in the utility model shows the diagram.

[0020] The component marks in the drawing are as follows:

[0021] 1, first triangle frame, 2, second triangle frame, 3, cross bar, 4, bottom plate, 5, base plate, 31, first bolt hole, 51, second bolt hole, 52, top screw hole. DETAILED DESCRIPTION

[0022] In order to let the technical personnel of the prior art better understand and realize the technical scheme of the utility model, the following will be further detailed with the description of the drawing and specific embodiment.

[0023] As Figure 1 And Figure 2As shown in the utility model, the base plate clamping device of the large selective laser sintering equipment comprises a bottom plate 4, a first triangular frame 1, a second triangular frame 2 and at least two cross bars 3, the first triangular frame 1 and the second triangular frame 2 are vertically and parallelly arranged at the two end portions of the bottom plate 4, and the at least two cross bars 3 are fixedly arranged between the first triangular frame 1 and the second triangular frame 2 in sequence from top to bottom or from bottom to top; a plurality of first bolt holes 31 are formed in the at least two cross bars 3, a plurality of second bolt holes 51 corresponding to the first bolt holes 31 are formed in the back of the base plate 5 away from the printing workpiece, the first bolt hole 31 and the corresponding second bolt hole 51 are fastened and connected by a bolt to realize the fixed connection of the base plate 5 and the cross bar 3, and the at least two cross bars 3 are channel steels.

[0024] In order to improve the stability of the base plate clamping device, the first triangular frame 1 and the second triangular frame 2 are respectively welded and connected with the bottom plate 4; the first triangular frame 1 and the second triangular frame 2 are respectively welded and connected with the cross bar 3. Further preferably, the first triangular frame 1, the second triangular frame 2 and the bottom plate 4 are all channel steels, and the specification of the channel steel is 80*80*10mm, so that the base plate 5 can be more stably supported.

[0025] In the specific implementation, the shape of the base plate 5 is square or circular, and of course it can also be other shapes, which is not limited in the application. The bottom plate 4 is preferably rectangular, and when the diameter of the base plate 5 is 1510mm, the size of the bottom plate 4 is 1800*500*10mm.

[0026] Preferably, in order to achieve the purpose of weight reduction, the bottom plate 4 adopts a hollow structure, and specifically, the non-welding area of the bottom plate 4 and the cross bar 3 can be designed to be hollow.

[0027] Preferably, the base plate clamping device further comprises two jack holes 52, and the jack holes 52 are formed on the base plate 5. Because there is a gap between the base plate and the base plate clamping device during the early installation, the position deviation will occur, thereby affecting the fastening of the bolt. In order to enable the bolt to better fasten the base plate and the base plate clamping device together, the two jack holes 52 on the base plate and the clamping device can be used for calibration. After the base plate and the clamping device are assembled, the jack hole 52 is no longer in effect.

[0028] Preferably, as shown in Figure 1 and Figure 2 The number of the cross bars 3 is three, which are parallel to each other and uniformly located above the bottom plate 4, and are used for fixedly connecting the base plate 5. Of course, in the application, the number of the cross bars 3 is not limited, and it can be specifically selected according to the size of the base plate 5.

[0029] In a specific implementation, the diameters of the first bolt hole 31 and the second bolt hole 51 can be 16 mm. It should be noted that the first triangular frame 1 and the second triangular frame of the present application can have the specific structures shown in Figure 1 and Figure 2 of course, other specific structures can also be used as long as they have the function of triangular frames, and in specific implementations, at least one horizontal or vertical reinforcing rib can be arranged inside the triangular frame, and the specific number of reinforcing ribs can be determined according to the rigidity and other requirements, which will not be listed one by one.

[0030] The working process of the base plate clamping device of the selective laser sintering large equipment is as follows:

[0031] As shown in Figure 3 and Figure 4 , the edge of the base plate is provided with 12 bolt holes with a diameter of 16 mm uniformly distributed in the circumferential direction, which are used to fasten the base plate 5 and the piston bottom plate 4 of the forming cylinder by bolts during printing. The connection between the base plate 5 and the base plate clamping device of the present application is also achieved by opening bolt holes on the base plate 5 and the cross bar 3 in the base plate clamping device of the present application, and connecting them by bolt fastening. The diameter of the bolt hole is also 16 mm, and the specific opening position is arranged equidistantly from the center line of the base plate 5 to both sides, as shown in Figure 4 The opening position and spacing of the cross bar 3 need to be consistent with the opening position and spacing of the base plate 5, as shown in Figure 3 When operating, the whole of the printed workpiece and the base plate 5 are transported to the side of the support, the base plate 5 is lifted vertically, and the base plate 5 is moved so that the bolt holes on the base plate 5 are aligned with the bolt holes on the channel steel of the support. M14x195 bolts are selected to connect and fasten the cross bar 3 and the base plate 5. After the fastening of multiple bolts, the wire cutting operation can be started. If the base plate 5 deviates from the position during installation due to deformation during printing or heat treatment, the original two top screw holes 52 on the base plate 5 can be used for positioning and calibration. After the position is adjusted, the bolts are tightened to ensure that the base plate 5 is connected to the cross bar 3. After wire cutting, the workpiece is separated from the base plate 5, the workpiece is moved away first, and then the bolts that fix the base plate 5 and the support are removed for next use. The base plate 5 needs to be matched with hoisting equipment during disassembly to avoid unnecessary safety problems caused by falling of the base plate 5.

[0032] The above embodiments are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. Any technical solution falling within the scope of the present application should be considered within the protection scope of the present application. It should be noted that some modifications and modifications without departing from the principles of the present application should be considered within the protection scope of the present application.

Claims

1. A substrate clamping device for a large-scale selective laser sintering (SLS) equipment, characterized in that, The substrate includes a base plate, a first triangular frame, a second triangular frame, and at least two crossbars. The first and second triangular frames are vertically and parallelly arranged at both ends of the base plate. The at least two crossbars are fixedly arranged between the first and second triangular frames at intervals, either from top to bottom or from bottom to top. Each of the at least two crossbars has a plurality of first bolt holes. The back of the substrate away from the printed workpiece has a plurality of second bolt holes corresponding to the first bolt holes. The first bolt holes and the corresponding second bolt holes are fastened together by bolts to achieve a fixed connection between the substrate and the crossbars. The at least two crossbars are channel steel.

2. The substrate clamping device for large-scale selective laser sintering equipment according to claim 1, characterized in that, The first triangular frame and the second triangular frame are welded to the base plate respectively; the first triangular frame and the second triangular frame are welded to the crossbar respectively.

3. The substrate clamping device for large-scale selective laser sintering equipment according to claim 1, characterized in that, The first triangular frame, the second triangular frame, and the base plate are all made of channel steel, and the channel steel has a specification of 80×80×10mm.

4. The substrate clamping device for large-scale selective laser sintering equipment according to claim 1, characterized in that, The substrate is square or circular in shape.

5. The substrate clamping device for large-scale selective laser sintering equipment according to claim 4, characterized in that, The base plate has a hollow structure.

6. The substrate clamping device for large-scale selective laser sintering equipment according to claim 1, characterized in that, The substrate clamping device also includes two set screw holes, which are formed on the substrate and used for positioning and calibrating the substrate.

7. The substrate clamping device for large-scale selective laser sintering equipment according to claim 1, characterized in that, There are three crossbars, which are parallel to each other and evenly positioned above the base plate, for fixing and connecting the base plate.

8. The substrate clamping device for a large-scale selective laser sintering apparatus according to any one of claims 1 to 7, characterized in that, The diameter of the first bolt hole and the second bolt hole is 16mm.

9. The substrate clamping device for large-scale selective laser sintering equipment according to claim 8, characterized in that, The base plate is rectangular.

10. The substrate clamping device for large-scale selective laser sintering equipment according to claim 9, characterized in that, When the diameter of the substrate is 1510mm, the dimensions of the base plate are 1800×500×10mm.

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