3D printing inner supporting strip removing tool

Abstract

The utility model discloses a 3D printing inner supporting strip removing tool which comprises a cutting knife and a shear fork type telescopic mechanism, a cutting edge is arranged at the front end of the cutting knife and right faces an upper connecting point and a lower connecting point of an auxiliary supporting strip to conduct cutting-off action, and a push rod is arranged between the cutting knife and the shear fork type telescopic mechanism and radially positions the cutting knife. The scissor-fork type telescopic mechanism comprises connecting arms which are equal in length, hinged in an overlapped mode and sequentially connected, a hinge pin, a holding ring and a positioning seat, the side faces of the connecting arms are in a certain radian, the positioning seat is arranged at the heads of the two connecting arms at the starting end and connected with the hinge pin, and a positioning hole is formed in the center of the positioning seat and fixedly connected with the push rod in a penetrating mode. The tool goes deep into an annular inner cavity of a 3D printing product by means of the scissor-type telescopic mechanism, the procedure of cutting off an auxiliary supporting strip is implemented through the special cutter, and due to the fact that the side face of the connecting arm is provided with a radian, in the telescopic process, the scissor-type telescopic mechanism always forms an arc telescopic action to fully adapt to an arc-shaped structure in a circular ring, and the working efficiency is improved. The auxiliary supporting strip can be conveniently cut.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, and in particular to a tool for removing inner support strips of 3D printing. Background Art

[0002] At present, 3D printing technology is relatively mature, and products of different shapes and structures can be easily printed. The most common method is to use ABS or PLA materials for hot melt spinning, which has a fast molding speed. Due to the influence of gravity, the 3D printing process cannot avoid being affected by the gravity of the printed product itself, and bending, deformation and sagging often occur. For this reason, the current 3D printing technology sets auxiliary support bars under the printed products without support structures to resist the pull of gravity and cause the product to deform. After the product is printed, the auxiliary support bars are manually removed after cooling and finalization. However, the support bars of some special-shaped products are hidden inside the product, such as the one provided by the customer. Figure 1 , Figure 2 The product to be printed is shown in the shape of a donut as a whole, with an open outer ring. Obviously, auxiliary support strips need to be designed inside to ensure that the forming of the upper circular ring surface is not twisted or deformed. However, after forming, the removal of the auxiliary support strips formed inside becomes troublesome. Therefore, the removal of the auxiliary support strips set in the internal cavity of this type of circular ring requires the use of special cutting tools to perfectly preserve the printed product and improve product quality. Utility Model Content

[0003] The purpose of the utility model is: in order to facilitate the removal of 3D printing auxiliary support strips set in a circular internal cavity, it is necessary to use a special cutting tool to perfectly retain the printed product and improve the technical requirements of product quality. We design and provide a 3D printing internal support strip removal tool. With the help of a scissor-type telescopic mechanism, the cutting knife is driven to move telescopically, and the scissor-type telescopic mechanism is set to the arc of the circular internal cavity, and the auxiliary support strip can be cut along the path of the inner cavity. It is very convenient to use, just like scissors.

[0004] The technical solutions adopted to solve the above problems are:

[0005] A 3D printing inner support strip removal tool comprises a cutting knife and a scissor-type telescopic mechanism, wherein a blade is arranged at the front end of the cutting knife, and a cutting action is performed on the upper and lower connection points of the auxiliary support strip. A push rod is arranged between the cutting knife and the scissor-type telescopic mechanism, and the push rod radially positions the cutting knife.

[0006] The scissor-type telescopic mechanism includes connecting arms of equal length, overlapping and hinged and connected in sequence, as well as hinge pins, gripping rings and positioning seats. The overlapping parts in the middle and at both ends of the connecting arms are connected by hinge pins, and the side surfaces of the connecting arms have a certain curvature. The gripping ring is in the shape of a circular ring and is integrally arranged at the tail of the two connecting arms at the end, so as to facilitate manual finger gripping and force application. The positioning seat is arranged at the heads of the two connecting arms at the starting end and is connected to the hinge pin. A positioning hole is arranged in the center, and the positioning hole is interlaced and fixedly connected with the push rod.

[0007] Furthermore, the cutting knife is arranged according to the inner wall shape of the circular internal cavity cross section. Under the push of the scissor-type telescopic mechanism, the cutting knife obtains cutting force, cuts off all the internal auxiliary support strips, and no residual material remains at the position of the inner wall.

[0008] Furthermore, the curvature of the side of the connecting arm is the same as the curvature of the center arc of the internal cavity of the printed circular product, so as to ensure that the scissor-type telescopic mechanism remains on the center arc of the internal cavity during the telescopic action, thereby ensuring the accuracy of the cutting force direction.

[0009] Furthermore, the telescopic stroke of the scissor-type telescopic mechanism covers half of the inner cavity of the annular product to ensure that the cutting knife can cut the auxiliary support strip within the semicircular stroke.

[0010] Furthermore, a socket is provided at the connection between the cutting knife and the push rod, so that the push rod and the cutting knife can be detached and separated, and the cutting knife can be specially matched according to the shape of the inner aperture of the product, which is practical and convenient.

[0011] The beneficial effects of the utility model are:

[0012] The 3D printing internal support strip removal tool uses a scissor-type telescopic mechanism to penetrate deep into the circular internal cavity of the 3D printed product, and a special cutting knife is used to cut off the auxiliary support strip. Since the side of the connecting arm is set to a certain arc, during the telescopic process, the scissor-type telescopic mechanism always forms an arc telescopic action, which fully adapts to the arc structure inside the ring, can facilitate the cutting of the auxiliary support strip, and is practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a circular 3D printed product;

[0014] Figure 2 This is a cross-sectional view of a circular 3D printed product;

[0015] Figure 3 A top view of a tool for removing support strips in 3D printing according to an embodiment;

[0016] Figure 4 It is a left view of the 3D printing inner support strip removal tool in the embodiment;

[0017] Figure 5 This is a schematic diagram of the embodiment of the 3D printing internal support strip removal tool implementing cutting of the auxiliary support strip;

[0018] Among them, 1-3D printing product, 2-opening, 3-auxiliary support bar, 4-first grip ring, 5-second grip ring, 6-connecting arm, 7-hinge pin, 8-push rod, 9-positioning seat, 10-cutting knife, 11-blade, 12-plug seat. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model will be clearly and completely described in the following in combination with the accompanying drawings in the form of embodiments.

[0020] See also Figures 3 to 5 The present embodiment proposes a 3D printing inner support strip removal tool, which is a tool for removing auxiliary support strips for 3D printing products that are donut-shaped as a whole and have an outer ring opening. The tool comprises a cutting knife 10 and a scissor-type telescopic mechanism. The cutting knife 10 is arranged according to the inner wall shape of the cross section of the inner cavity of the circular ring, and a blade 11 is arranged at the front end, which performs a cutting action directly at the upper and lower connection points of the auxiliary support strips 3. Under the push of the scissor-type telescopic mechanism, the cutting knife 10 obtains a cutting force, cuts off all the internal auxiliary support strips 3, and there is no residual material left at the position of the inner wall. A push rod 8 is arranged between the cutting knife 10 and the scissor-type telescopic mechanism, and the push rod 8 radially positions the cutting knife 10. A socket 12 is arranged at the connection between the cutting knife 10 and the push rod 8, so that the push rod 8 and the cutting knife 10 can be detached and separated. The cutting knife 10 can be specially matched according to the shape of the inner aperture of the product, which is practical and convenient.

[0021] See also Figure 3 The scissor-type telescopic mechanism includes connecting arms 6 of equal length, overlapping and hinged and connected in sequence, as well as a hinge pin 7, a grip ring and a positioning seat 9. The overlapping parts in the middle and at both ends of the connecting arm 6 are connected by a hinge pin 7, and the side surfaces of the connecting arm 6 have a certain curvature. The grip ring is in a circular ring shape and is integrally arranged at the tail of the two connecting arms 6 at the end, which is convenient for manual fingers to hold and apply force. The positioning seat 9 is arranged at the head of the two connecting arms 6 at the starting end and is connected to the hinge pin 7. A positioning hole is arranged in the center, and the positioning hole is interlaced and fixedly connected with the push rod 8.

[0022] See also Figure 5 In order to ensure that the scissor-type telescopic mechanism remains on the central arc of the internal cavity during the telescopic action and to ensure the accuracy of the cutting force direction, the curvature of the side of the connecting arm 6 is the same as the curvature of the central arc of the internal cavity of the printed circular product.

[0023] In order to ensure that the cutter can penetrate into the arc space covering more than a semicircle and fully cut the auxiliary support strip, the telescopic stroke of the scissor-type telescopic mechanism covers half of the internal cavity of the circular product to ensure that the cutter 10 can cut the auxiliary support strip 3 within the semicircular stroke.

[0024] The above describes in detail the implementation modes of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes. Various changes, modifications, substitutions and variations can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 3D printing inner support strip removal tool, comprising a cutting knife (10) and a scissor-type telescopic mechanism, characterized in that: The cutting knife (10) is provided with a blade (11) at the front end thereof, and performs a cutting action directly on the upper and lower connection points of the auxiliary support bar (3). A push rod (8) is provided between the cutting knife (10) and the scissor-type telescopic mechanism, and the push rod (8) radially positions the cutting knife (10). The scissor-type telescopic mechanism comprises connecting arms (6) of equal length, overlapping and hinged and connected in sequence, as well as a hinge pin (7), a grip ring and a positioning seat (9). The overlapping parts in the middle and at both ends of the connecting arms (6) are connected by a hinge pin (7), and the side surfaces of the connecting arms (6) present a certain curvature. The grip ring is in the shape of a circular ring and is integrally arranged at the tail of the two connecting arms (6) at the end. The positioning seat (9) is arranged at the head of the two connecting arms (6) at the starting end and is connected to the hinge pin (7). A positioning hole is arranged in the center, and the positioning hole is interlaced and fixedly connected with the push rod (8).

2. The 3D printing inner support strip removal tool according to claim 1, characterized in that: The cutting knife (10) is arranged according to the inner wall shape of the cross section of the circular inner cavity, and the cutting knife (10) obtains cutting force under the push of the scissor-type telescopic mechanism.

3. The 3D printing inner support strip removal tool according to claim 1, characterized in that: The curvature of the side surface of the connecting arm (6) is the same as the curvature of the central arc of the inner cavity of the printed annular product.

4. The 3D printing inner support strip removal tool according to claim 1, characterized in that: The telescopic stroke of the scissor-type telescopic mechanism covers half of the inner cavity of the annular product.

5. The 3D printing inner support strip removal tool according to claim 1, characterized in that: A socket (12) is provided at the connection between the cutting knife (10) and the push rod (8), which enables the push rod (8) and the cutting knife (10) to be detachably separated.

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