Device for testing toughness of FDM (fused deposition modeling) type 3D (three-dimensional) printing wire

Abstract

The utility model discloses a toughness testing device for FDM type 3D printing wires, which comprises a bottom plate, a directional feeding mechanism, an impact detection mechanism and a controller, the bottom plate is vertically fixed on a detection station, and the directional feeding mechanism, the impact detection mechanism and the controller are all mounted on the bottom plate; the directional feeding mechanism comprises a wire feeding driving structure and a directional feeding structure, a discharging guide hole for horizontal discharging is formed in the directional feeding structure, and the wire feeding driving structure is arranged on the outer side of a feeding port of the discharging guide hole. And the impact detection mechanism is located on the outer side of a discharging opening of the discharging guide hole and comprises an impact block and an impact driving structure, the impact block is connected with the impact driving structure, and the wire feeding driving structure and the impact driving structure are electrically connected with a controller. By means of the mode, the wire rod bending testing device can simulate the actual use condition and verify the adaptability of the wire rod to the bending state of the printing environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing detection equipment field especially, and it is a kind of toughness testing device of FDM type 3D printing wire rod. BACKGROUND

[0002] Current 3D printer uses wire rod usually for the circular silk shape plastic of diameter 1.75mm, usually raw material is thermoplastic resin.In the use process, wire rod enters the nozzle of 3D printer by material guide pipe, and in the printing process, with the high-speed movement of nozzle, material guide pipe often can occur large bending, if wire rod is more brittle, in this repeated bending process, it can appear fracture etc.Problem, once fracture in material guide pipe, it can produce material block or broken material, cause printing interruption or failure, especially fiber reinforced material, more easily appear this kind of problem.Therefore need a kind of detection mode to evaluate the adaptability of wire rod to repeated bending state in printing process, that is toughness.At present, the toughness test of thermoplastic resin is usually made into standard size cuboid impact sample and tensile sample according to national standard, sample is tested, and the area covered by stress strain curve image of impact strength and tensile test is judged comprehensively.This is more time-consuming, and the forming process of resin sample needs to pass through heat processing, and heat processing process itself can also cause the change of physical property, so data itself has certain error, cannot intuitively reflect overall toughness.Therefore need a kind of test device to directly test and evaluate the toughness performance of wire rod in actual use UTILITY MODEL CONTENT

[0003] The utility model mainly solves the technical problem to provide a kind of toughness testing device of FDM type 3D printing wire rod, can detect the adaptability to bending in actual use.

[0004] To solve the above technical problems, the utility model adopts a technical scheme of providing a kind of toughness testing device of FDM type 3D printing wire rod, the toughness testing device of FDM type 3D printing wire rod includes: bottom plate, directional feeding mechanism, impact detection mechanism and controller, the bottom plate is fixed vertically in detection station, directional feeding mechanism and impact detection mechanism and controller are all installed on the bottom plate;The directional feeding mechanism includes wire feeding drive structure and directional feeding structure, the directional feeding structure is fixed on the bottom plate, directional feeding structure is equipped with discharge guide hole, wire feeding drive structure is arranged in the feeding port outside being installed in the discharge guide hole, the discharge direction of discharge guide hole is parallel with horizontal plane, wire feeding drive structure is electrically connected with the controller, can complete corresponding wire feeding action according to the instruction of the controller;The impact detection mechanism is located in the feeding port outside of discharge guide hole, and the impact detection mechanism includes impact block and impact drive structure, the impact block is connected with the drive structure, the impact drive structure is electrically connected with the controller and can drive the impact block vertical up and down motion according to the instruction of the controller, and impact detection action is completed.

[0005] In a preferred embodiment of the utility model, the directional feeding structure includes guide bracket and L-shaped positioning support plate, the discharge side of guide bracket is equipped with splicing groove, the top of splicing groove is equipped with downwardly open discharge guide groove, the top shape of L-shaped positioning support plate is matched with the shape of splicing groove, when the top of L-shaped positioning support plate is inserted into splicing groove, the splicing surface of top just closes the slot of discharge guide groove, and the middle rear section of discharge guide hole is formed, the outer side surface of the part perpendicular to the top of L-shaped positioning support plate is parallel with the discharge port position of discharge guide hole to form splash-proof, the outer side top corner of L-shaped positioning support plate is round, and connecting bolt is further arranged between splicing groove and L-shaped positioning support plate.

[0006] In a preferred embodiment of the utility model, the wire feeding drive structure includes first drive motor and wire feeding gear set, the wire feeding gear set includes two wire feeding gears, the two wire feeding gears are symmetrically arranged on both sides of wire feeding path and close to the feeding port of discharge guide hole, one of two wire feeding gears is driving wheel, and the other is driven wheel, and the power output end of first drive motor is connected with the central shaft of driving wheel.

[0007] In a preferred embodiment of the utility model, the impact driving structure includes second driving motor, transmission screw rod, guide slide rod, transmission frame and slide table, the transmission frame is fixed on the bottom plate, the transmission screw rod and guide slide rod are all installed in the transmission frame, the installation direction of the transmission screw rod and the guide slide rod is all perpendicular to the horizontal plane, the second driving motor is installed outside the transmission frame, the power output end of the second driving motor is connected with one end of the transmission screw rod, the slide table is installed on the transmission frame by the transmission screw rod and guide slide rod, the impact block is fixedly connected with one end of the slide table, the driving motor can drive the transmission screw rod to rotate according to the instruction of the controller, drives the slide table to drive the impact block to move vertically up and down along the direction of the guide slide rod. The impact block is L-shaped, the stamping end of the impact block is the short side part of the L-shaped, the inner side of the short side part is fixed together with the slide table. The outside top corner of the impact block is a round corner.

[0008] The utility model has the advantages that: the utility model is driven by mechanical structure to move wire rod, simulates extreme state action of wire rod in actual use process, whole structure is simple, convenient to use, and the detection speed is fast, and the result is intuitive and reliable, can accurately evaluate the toughness performance of wire rod in actual use, reduces the error when sample detection. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is the three-dimensional structure schematic diagram of taking out the supporting block of a preferred embodiment of the utility model;

[0010] Fig. 2 It is the front view structure schematic diagram before detection of the shown embodiment;

[0011] Fig. 3 It is the front view structure schematic diagram after detection of the shown embodiment;

[0012] The marks of various components in the drawings are as follows:

[0013] 1. Wire release roll, 2. Bottom plate, 3. Controller, 4. Transmission frame, 5. Second driving motor, 6. Slide table, 7. Transmission screw rod, 8. Guide slide rod, 9. Impact block, 10. Positioning supporting block, 11. Guide support, 12. First driving motor, 13. Wire feeding gear set. DETAILED DESCRIPTION

[0014] The preferred embodiment of the utility model is described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0015] Please refer to Figs. 1 to 3 The utility model embodiment includes:

[0016] A toughness testing device for FDM type 3D printing wire, comprising a base plate 2, a directional feeding mechanism, an impact detection mechanism and a controller 3, the base plate 2 is vertically fixed on the detection station, the directional feeding mechanism, the impact detection mechanism and the controller 3 are all installed on the base plate 2; the directional feeding mechanism comprises a wire feeding driving structure and a directional feeding structure, the directional feeding structure is fixed on the base plate 2, the directional feeding structure is provided with a discharging guide hole, the wire feeding driving structure is arranged outside the feeding port of the discharging guide hole, the discharging direction of the discharging guide hole is parallel to the horizontal plane, the wire feeding driving structure is electrically connected with the controller 3, and corresponding wire feeding actions can be completed according to the instructions of the controller 3; the impact detection mechanism is located outside the discharging port of the discharging guide hole, and the impact detection mechanism comprises an impact block 9 and an impact driving structure, the impact block 9 is connected with the driving structure, and the impact driving structure is electrically connected with the controller 3, so that the impact block 9 can be driven to move vertically up and down according to the instructions of the controller 3 to complete the impact detection action.

[0017] The directional feeding structure comprises a guide bracket 11 and an L-shaped positioning supporting plate 10, the discharging side of the guide bracket 11 is provided with a splicing groove, the top of the splicing groove is provided with a downwardly open discharging guide groove, the top of the L-shaped positioning supporting plate 10 is matched with the shape of the splicing groove, when the top of the L-shaped positioning supporting plate 10 is inserted into the splicing groove, the splicing surface of the top just closes the slot of the discharging guide groove to form the middle and rear sections of the discharging guide hole, and after splicing, the L-shaped positioning supporting plate 10 can be fixed with the splicing groove by using a connecting bolt from below the splicing groove, at this time, the outer side surface of the vertical part of the L-shaped positioning supporting plate 10 is parallel to the discharging port position of the discharging guide hole to form a splash-proof baffle. The outer side corner of the L-shaped positioning supporting plate 10 is a rounded corner. The outer side corner is the inside corner position of the wire bending, and the radian reflects the actual bending condition, so that when the above splicing structure is used, on the one hand, the L-shaped positioning supporting plate 10 with different radii of rounded corners can be quickly replaced according to different requirements of the bending degree during detection, and on the other hand, if the wire structure in the discharging guide hole is deformed and blocked due to the impact of the impact block 9 during actual detection, the L-shaped positioning supporting plate 10 can be conveniently disassembled and released.

[0018] The wire feeding driving structure comprises a first driving motor 12 and a wire feeding gear set 13, the wire feeding gear set 13 comprises two wire feeding gears symmetrically arranged on the upper and lower sides of a wire feeding path and close to a feeding port of the discharging guide hole, the lower wire feeding gear is a driving wheel, and the upper wire feeding gear is a driven wheel, and the power output end of the first driving motor 12 is connected with the middle shaft of the driving wheel. Thus, the first driving motor 12 can be controlled to rotate to continuously pull the wire from the wire feeding position to the discharging guide hole according to requirements during detection.

[0019] The impact driving structure comprises a second driving motor 5, a transmission screw 7, a guide slide rod 8, a transmission frame 4 and a slide table 6, the transmission frame 4 is fixed on the bottom plate 2, the transmission screw 7 and the guide slide rod 8 are both installed in the transmission frame 4, the installation directions of the transmission screw 7 and the guide slide rod 8 are both perpendicular to the horizontal plane, the second driving motor 5 is installed outside the transmission frame 4, the power output end of the second driving motor 5 is connected with one end of the transmission screw 7, the slide table 6 is installed on the transmission frame 4 by relying on the transmission screw 7 and the guide slide rod 8, the impact block 9 is fixedly connected with one end of the slide table 6, and the second driving motor 5 can drive the transmission screw 7 to rotate and drive the slide table 6 to drive the impact block 9 to vertically move up and down along the guide slide rod 8 according to the instruction of the controller 3. Thus, the rotation of the second driving motor 5 is converted into the vertical movement of the slide table 6 by the transmission screw 7, and the movement of the slide table 6 drives the impact block 9 to move up and down to complete the stamping action.

[0020] The impact block 9 is L-shaped, the stamping end of the impact block 9 is a short side part of the L-shaped structure, and the inner side of the short side part is fixed with the slide table 6 by bolts. The outer side corner of the impact block 9 is a round corner. The L-shaped structure is convenient to fix with the slide table 6, the outer side of the long side part is opposite to the outer side of the L-shaped positioning supporting plate 10, the wire is blocked from both sides after stamping, so that the broken wire cannot be ejected to the surrounding, and the outer side corner is a round corner, so that the stamping action is closer to the bending state in actual work.

[0021] The actual working steps of the utility model are as follows:

[0022] The first step is to place the wire feeding position of the wire feeding position on the detection station, then pull the wire end, and clamp the wire end into the wire feeding gear set 13;

[0023] The second step is to start the first driving motor 12, the wire feeding gear set 13 rotates, the wire is continuously fed into the feeding port of the discharging guide hole of the guide support 11, until the wire end stretches out from the discharging port of the discharging guide hole, at this time, the impact block 9 is located above the discharging port of the discharging guide hole,

[0024] The third step is to start the second driving motor 5, rotate the transmission screw 7, drive the impact block 9 to fall, stamp the extended wire end, observe whether it is broken, record the first time, and then cut the wire at the outlet;

[0025] The fourth step is to repeat the second and third steps to the required number of times to obtain the final statistical result.

[0026] The actual statistical result evaluation example is as follows:

[0027] The impact speed of sample 1 is 100 mm / s

[0028]

[0029] The evaluation result is that the consumables are not easy to break when the bending angle of the guide pipe is greater than or equal to 9 mm

[0030] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection range of the present application.

Claims

1. A toughness testing device for FDM type 3D printing filament, characterized in that, The toughness testing device of the FDM type 3D printing wire rod comprises a bottom plate, an orientation feeding mechanism, an impact detection mechanism and a controller, the bottom plate is vertically fixed on a detection station, the orientation feeding mechanism and the impact detection mechanism and the controller are all installed on the bottom plate; The orientation feeding mechanism comprises a wire feeding driving structure and an orientation feeding structure, the orientation feeding structure is fixed on the bottom plate, the orientation feeding structure is provided with a discharging guide hole, the wire feeding driving structure is arranged outside a feeding port of the discharging guide hole, a discharging direction of the discharging guide hole is parallel to a horizontal plane, the wire feeding driving structure is electrically connected with the controller, and corresponding wire feeding actions can be completed according to instructions of the controller; The impact detection mechanism is located outside a discharging port of the discharging guide hole, the impact detection mechanism comprises an impact block and an impact driving structure, the impact block is connected with the impact driving structure, the impact driving structure is electrically connected with the controller, the impact block can be driven to vertically move up and down according to instructions of the controller, and impact detection actions can be completed. 2.The toughness testing device of the FDM type 3D printing thread according to claim 1, wherein, The orientation feeding structure comprises a guide support and an L-shaped positioning supporting plate, a splicing groove is arranged on a discharging side of the guide support, a downwardly-opened discharging guide groove is arranged on a top of the splicing groove, a top of the L-shaped positioning supporting plate is matched with a shape of the splicing groove, when the top of the L-shaped positioning supporting plate is inserted into the splicing groove, a splicing surface of the top just closes a groove opening of the discharging guide groove to form a middle rear section of the discharging guide hole, and an outer side surface of a vertical part of the L-shaped positioning supporting plate is parallel to a position of the discharging port of the discharging guide hole to form a splash-proof part. 3.The toughness testing device of the FDM type 3D printing thread according to claim 2, wherein, An outer side top corner of the L-shaped positioning supporting plate is a round corner. 4.The toughness testing device of the FDM type 3D printing thread according to claim 2, wherein, Connecting bolts are further arranged between the splicing groove and the L-shaped positioning supporting plate. 5.The toughness testing device of FDM type 3D printing thread according to claim 1, wherein, The wire feeding driving structure comprises a first driving motor and a wire feeding gear set, the wire feeding gear set comprises two wire feeding gears, the two wire feeding gears are symmetrically arranged on both sides of a wire feeding path and close to a feeding port of the discharging guide hole, one of the two wire feeding gears is a driving gear, and the other is a driven gear, and a power output end of the first driving motor is connected with a middle shaft of the driving gear. 6.The toughness testing device of an FDM type 3D printing filament according to claim 1, wherein, The impact driving structure comprises a second driving motor, a transmission screw rod, a guide slide rod, a transmission frame and a slide table, the transmission frame is fixed on the bottom plate, the transmission screw rod and the guide slide rod are both installed in the transmission frame, installation directions of the transmission screw rod and the guide slide rod are both perpendicular to a horizontal plane, the second driving motor is installed outside the transmission frame, a power output end of the second driving motor is connected with one end of the transmission screw rod, the slide table is installed on the transmission frame by relying on the transmission screw rod and the guide slide rod, the impact block is fixedly connected with one end of the slide table, and the driving motor can drive the transmission screw rod to rotate and drive the slide table to drive the impact block to vertically move up and down along a direction of the guide slide rod according to instructions of the controller. 7.The toughness testing device of the FDM type 3D printing thread according to claim 6, wherein, The impact block is L-shaped, a stamping end of the impact block is a short side part of the L shape, and an inner side of the short side part is fixed with the slide table. 8.The toughness testing device of the FDM type 3D printing thread according to claim 7, wherein, The outer top corner of the impact block is rounded. The outer top corner of the impact block is rounded.

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