Placing assembly for detecting diameter change of wire rod in real time and 3D printer

Abstract

The utility model discloses a placing assembly for real-time detection of wire rod diameter change and a 3D printer, the placing assembly comprises a placing assembly body, the placing assembly body comprises a placing box, and the placing assembly body further comprises at least two threading holes penetrating through the placing box; the photoelectric sensor is arranged in the containing box and forms a light beam, and the center line of the light beam intersects with and is perpendicular to the axis of the threading hole. According to the utility model, the photoelectric sensor is used for detecting the shielding or reflection of the wire to the light beam and converting the change of an optical signal into the change of an electric signal, so that the diameter change of the wire is detected in real time, and when the diameter of the wire is reduced, the light beam is slightly shielded, and the generated electric signal change is transmitted to the control system to reduce the moving speed of the printing device; the quality of each layer of the printing model is the same; when the diameter of the wire becomes larger, the light beams are shielded much, and generated electric signal changes are transmitted to a control system to improve the moving speed of the printing device, so that the quality of each layer of a printing model is the same.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printer technical field, concretely relates to a kind of placement assembly and 3D printer of real-time detection wire diameter variation. BACKGROUND

[0002] 3D printer is a kind of equipment according to digital three-dimensional model manufacturing physical object, it constructs object by the way of layer-by-layer adding material, this process is called additive manufacturing, it is usually converted into the instruction that printer can understand by slice software to three-dimensional model, control system controls step motor movement, and then controls nozzle to print layer by layer on printing bed after printing wire material placed on reel is fused.3D printer wire material is usually made of thermoplastic, can form three-dimensional object after basis and by cooling solidification after heating.

[0003] Wire diameter is commonly 1.75mm and 3mm, when selecting wire material, it needs to ensure that the diameter of selected wire material matches the specification of 3D printer nozzle, if wire diameter does not match nozzle, it can cause printing quality problem, such as extruding too much or too little material, or wire material cannot smoothly pass through nozzle, cause blockage or other printing failure.The inventor of the present application found that, when using existing 3D printer and wire material, wire material diameter size fluctuates due to machining error, causing wire material and nozzle size mismatch, even when wire material on reel is entangled or damp wire material is interrupted, wire diameter can be regarded as 0mm at this time, nozzle prints empty at this time, goes empty stroke, model cannot continue printing and causes scrap, affect the quality of printer printing model. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of placement assembly and 3D printer of real-time detection wire diameter variation to solve the problem that existing 3D printer cannot detect wire diameter variation in real time, and specific technical solutions are as follows:

[0005] A kind of placement assembly of real-time detection wire diameter variation, including placement assembly body, the placement assembly body includes placement box, and is characterized in that, placement assembly body further includes: at least two threading holes passing through placement box;Photoelectric sensor is set on placement box, the photoelectric sensor is formed with light beam, the center line of the light beam intersects and is perpendicular to the axis of threading hole;Placement box forms cavity, the reel is arranged in the cavity, the outer circumferential surface of the reel is placed wire material, wire material passes through threading hole, the diameter of threading hole and the diameter of wire material are all same, the common diameter of wire material is 1.75mm and 3mm, and the diameter of threading hole is 1.75mm and 3mm respectively.

[0006] Preferably, the inside of the placing box forms a photoelectric mounting groove, the photoelectric mounting groove is composed of a groove and a channel, the groove of the photoelectric mounting groove is the same size as the photoelectric sensor, and the channel of the photoelectric mounting groove penetrates the groove of the photoelectric mounting groove and the threading hole.

[0007] Preferably, the photoelectric sensor further comprises a transmitting element and a receiving element, the transmitting element is capable of transmitting a light beam through the channel of the photoelectric mounting groove, the center line of the light beam intersects and is perpendicular to the axis of the wire, and the receiving element is capable of receiving a light signal of the light beam and converting the light signal into an electric signal.

[0008] Preferably, the strength of the light signal of the light beam is inversely proportional to the diameter of the wire, and the strength of the electric signal is proportional to the strength of the light signal.

[0009] A 3D printer comprises a printing device capable of fusing and printing a wire, a placing assembly body capable of placing the wire, and a control system capable of adjusting the moving speed of the printing device according to an electric signal provided by the placing assembly body.

[0010] Preferably, the diameter of the wire is proportional to the moving speed of the printing device

[0011] According to the above technical solution, the utility model has the following beneficial effects:

[0012] The utility model discloses a photoelectric sensor detects the shielding or reflection of the light beam by the wire, converts the change of the light signal into the change of the electric signal, thereby detecting the diameter change of the wire in real time, when the diameter of the wire becomes small, the light beam is shielded less, and the electric signal change generated thereby is transmitted to the control system to reduce the moving speed of the printing device, thereby ensuring that the quality of each layer of the printing model is the same, when the diameter of the wire becomes large, the light beam is shielded more, and the electric signal change generated thereby is transmitted to the control system to improve the moving speed of the printing device, which is also for ensuring that the quality of each layer of the printing model is the same. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the placing assembly embodiment of the utility model;

[0014] Figure 2 It is Figure 1 a sectional view;

[0015] Figure 3 It is a structure schematic view of the 3D printer embodiment of the utility model.

[0016] In the drawing: 1, placing assembly body; 2, printing device; 3, control system; 11, placing box; 12, cavity; 13, winding drum; 14, threading hole; 15, photoelectric mounting groove; 16, photoelectric sensor; 17, light beam; 18, transmitting element; 19, receiving element Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1

[0020] like Figure 1 As shown, this embodiment includes a placement component body 1, which includes a placement box 11 and further includes: a wire hole 14 penetrating the placement box 11; and a photoelectric sensor 16 disposed on the placement box 11, the photoelectric sensor 16 forming a light beam 17, the center line of the light beam 17 intersecting and perpendicular to the axis of the wire hole 14.

[0021] Specifically, a wire is placed inside the placement box 11. The wire moves within the wire-passing hole 14. The photoelectric sensor 16 converts the light signal into an electrical signal. Utilizing the photoelectric effect, it detects the obstruction or reflection of the beam 17 by the object being measured, converting changes in the light signal into changes in the electrical signal, thereby sensing the state of the environment or object. Therefore, its centerline intersects the axis of the wire-passing hole 14, allowing it to determine the change in wire diameter by receiving changes in the light signal from the beam 17 passing through the wire. Its centerline is perpendicular to the axis of the wire-passing hole 14, making the beam 17 parallel to the plane of the wire-passing hole 14. This ensures that the light signal remains perpendicular to the wire axis throughout its passage, guaranteeing that the light signal at a corresponding position can only measure the diameter change at that corresponding position, thus improving the accuracy of wire diameter detection.

[0022] Furthermore, the placement box 11 forms a cavity 12, and a spool 13 is disposed inside the cavity 12. A wire is placed on the outer circumference of the spool 13, and the wire passes through a threading hole 14. The diameter of the threading hole 14 is the same as the diameter of the wire.

[0023] Specifically, the use process of the placing assembly body 1 is as follows: winding the wire on the winding drum 13, and then passing the wire through the wire hole 14. When the wire moves through the wire hole 14, the winding drum 13 rotates with it. The wire with the same diameter as the wire hole 14 can make the axis of the wire coincide with the axis of the wire hole 14 during movement, thereby ensuring that the light signal of the light beam 17 can pass through the complete outer peripheral surface of the wire, and ensuring that the light signal can detect the real diameter change of the wire.

[0024] Further, the common diameters of the wire are 1.75 mm and 3 mm, and the diameters of the wire hole 14 are 1.75 mm and 3 mm respectively.

[0025] Specifically, the diameters of the wire hole 14 are the same as the diameters of the wire, so that whether 1.75 mm wire or 3 mm wire is used, the axis of the wire can always coincide with the axis of the wire hole 14, thereby ensuring the accuracy of the optical sensor 16 in detecting the diameter of the wire.

[0026] As shown in Figure 2 Further, the inside of the placing box 11 forms an optical installation groove 15, which is composed of a groove and a channel. The groove of the optical installation groove 15 is the same size as the optical sensor 16, and the channel of the optical installation groove 15 penetrates the groove of the optical installation groove 15 and the wire hole 14.

[0027] Specifically, the optical installation groove 15 is used to fixedly install the optical sensor 16 on the inside side of the placing box 11, so that the relative position of the optical sensor 16 and the wire hole 14 is always unchanged. The groove fixes the optical sensor 16 by fixed connection such as bolts, and the light beam 17 emitted by the optical sensor 16 just passes through the channel and the wire hole 14, and also passes through the wire, so that the optical sensor 16 is fixed while not hindering the path of the light beam 17, and the light signal carried by the light beam 17 only passes through the wire.

[0028] Further, the optical sensor 16 also includes a transmitting element 18 and a receiving element 19. The transmitting element 18 can emit the light beam 17 to pass through the channel of the optical installation groove 15, and the center line of the light beam 17 intersects and is perpendicular to the axis of the wire. The receiving element 19 can receive the light signal of the light beam 17 and convert it into an electrical signal.

[0029] Specifically, the light beam 17 of the transmitting element 18 passes through the channel and the wire to the receiving element 19, which receives the light signal carrying the diameter information of the wire and converts it into a corresponding electrical signal. When the light beam 17 passes through the corresponding position of the wire, the light signal carries the real size information of the wire at the corresponding position.

[0030] Furthermore, the intensity of the optical signal in beam 17 is inversely proportional to the diameter of the wire, and the intensity of the electrical signal is directly proportional to the intensity of the optical signal.

[0031] Specifically, the larger the wire diameter, the fewer light beams 17 pass through the wire, resulting in a weaker optical signal and consequently a weaker converted electrical signal; conversely, the smaller the wire diameter, the more light beams 17 pass through the wire, resulting in a stronger optical signal and consequently a stronger converted electrical signal. When the wire breaks, the light beams 17 are converted into electrical signals without loss.

[0032] Example 2

[0033] like Figure 3 As shown, this embodiment includes: a printing device 2, which is capable of melting and printing filament; a placement component body 1 of Embodiment 1, which is capable of placing filament; and a control system 3, which is capable of adjusting the movement speed of the printing device 2 according to the electrical signal provided by the placement component body 1.

[0034] Specifically, the component body 1 releases the filament, and the printing device 2 uses the released filament to print. When the diameter of the filament changes, the optical signal changes, and the electrical signal changes simultaneously. This allows the control system 3 to adjust the movement speed of the printing device 2 according to the electrical signal, thereby controlling the release speed of the filament.

[0035] Furthermore, the diameter of the wire is directly proportional to the speed of the printing device 2.

[0036] Specifically, as the diameter of the filament decreases, the electrical signal increases, which in turn reduces the movement speed of the printing sheet in control system 3, thereby reducing the movement speed of the filament. This keeps the total amount of filament melted by printing device 2 constant, meaning the volume of filament melted per unit time decreases. Printing device 2 should then increase the melting time to ensure the total amount of filament melted and maintain the quality of the product printed by the nozzle. When the filament breaks, its diameter becomes zero, and printing device 2 stops, reducing wasted time and indirectly improving printing efficiency.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0038] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A placement assembly for detecting changes in wire diameter in real time, comprising a placement assembly body (1) comprising a placement box (11), characterized in that, The placing assembly body (1) further comprises: at least two threading holes (14) penetrating the placing box (11); a photoelectric sensor (16) disposed on the placing box (11), the photoelectric sensor (16) is formed with a light beam (17), the center line of the light beam (17) intersects and is perpendicular to the axis of the threading hole (14); the placing box (11) forms a cavity (12), the cavity (12) is internally provided with a winding drum (13), the outer circumferential surface of the winding drum (13) places a wire, the wire passes through the threading hole (14), the diameter of the threading hole (14) is the same as the diameter of the wire.

2. The placement assembly of claim 1, wherein: The common diameter of the wire is 1.75mm and 3mm, and the diameter of the threading hole (14) is 1.75mm and 3mm respectively.

3. The placement assembly of claim 2, wherein: The inside of the placing box (11) forms a photoelectric mounting groove (15), which is composed of a groove and a channel, the groove of the photoelectric mounting groove (15) is the same size as the photoelectric sensor (16), and the channel of the photoelectric mounting groove (15) penetrates the groove of the photoelectric mounting groove (15) and the threading hole (14).

4. The placement assembly of claim 3, wherein: The photoelectric sensor (16) further comprises a transmitting element (18) and a receiving element (19), the transmitting element (18) can emit the light beam (17) to pass through the channel of the photoelectric mounting groove (15), the center line of the light beam (17) intersects and is perpendicular to the axis of the wire, and the receiving element (19) can receive the optical signal of the light beam (17) and convert the optical signal into an electrical signal.

5. The placement assembly of claim 4, wherein: The strength of the optical signal of the light beam (17) is inversely proportional to the diameter of the wire, and the strength of the electrical signal is proportional to the strength of the optical signal.

6. A 3D printer characterized by, It comprises: a printing device (2) capable of fusing and printing the wire; the placing assembly body (1) according to claim 5, capable of placing the wire; and a control system (3) capable of adjusting the movement speed of the printing device (2) according to the electrical signal provided by the placing assembly body (1).

7. The 3D printer of claim 6, wherein: The diameter of the wire is proportional to the movement speed of the printing device (2).

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