Sucking device for ferromagnetic soft parts

Abstract

The invention discloses a device for sucking ferromagnetic soft parts. The device comprises a rack; the electromagnet assembly is mounted at the upper part of the rack and comprises a mounting plate; at least two electromagnet mounting grooves which are isolated from each other are formed inside the insulated electromagnet mounting seat, and an inverted U-shaped groove capable of accommodating a single ferromagnetic soft part is formed in the bottom of the insulated electromagnet mounting seat; an electromagnet gland; at least two electromagnets; one end of the measuring terminal is connected with the electromagnet, and the other end is exposed out of the electromagnet gland; the hopper is provided with a V-shaped part placing surface; the movement mechanism is mounted at the upper part of the rack and is connected with the electromagnet assembly, or is mounted at the lower part of the rack and is connected with the hopper; and the system controller is electrically connected with the movement mechanism, the electromagnet and the measuring terminal. According to the sucking device, ferromagnetic soft parts can be sucked one by one and accurately positioned, the sucking device is particularly suitable for automatic feeding of spring heating wires in the electric heating tube industry, and batch automatic machining of the parts is facilitated.

Description

Technical Field

[0001] The present invention belongs to the field of part processing, and relates to a part suction device, in particular to a suction device for ferromagnetic soft parts. Background Art

[0002] The heating element of an electric heating tube is generally a part made by winding an electric heating alloy wire into a spring shape. The two ends of the spring usually need to be connected with "lead rods", that is, the end of the spring is screwed into one end of the lead rod. Through the lead rod, the electric heating tube can be connected to an external power supply, so that the electric heating tube generates heat.

[0003] In traditional processes, it is necessary to manually connect and process the spring parts and the lead rods, which is time-consuming and laborious. In recent years, automated equipment has begun to appear for processing. When automated processing is adopted, it is necessary to grab the spring parts one by one and then position them, that is, place the grabbed parts on a suitable processing station for subsequent processing. Since the spring is a soft part, when grabbing such parts, a specially designed mechanical device is required. The existing methods usually require manual workers to neatly lay the spring parts in a single layer on the plane of the loading plate, and such equipment needs to be equipped with special personnel for loading.

[0004] Therefore, it is necessary to develop an automated device for sucking and positioning ferromagnetic soft parts such as spring heating wires. Summary of the Invention

[0005] The purpose of the present invention is to provide a suction device for ferromagnetic soft parts, which can achieve the individual suction and accurate positioning of ferromagnetic soft parts, is particularly suitable for the automatic feeding of spring heating wires in the electric heating tube industry, and is convenient for batch automated processing of parts.

[0006] The sucking device for ferromagnetic flexible parts according to the present invention includes: a frame having a mounting component and a frame for the mounted component to move; an electromagnet component mounted on the upper part of the frame, including: a mounting plate vertically mounted on the frame; an insulating electromagnet mounting base mounted on the lower part of the mounting plate; at least two mutually isolated electromagnet mounting grooves are provided inside the electromagnet mounting base; a reverse U-shaped groove capable of accommodating a single ferromagnetic flexible part is provided at the bottom of the electromagnet mounting base; the bottom of the electromagnet mounting groove is in contact with the top of the reverse U-shaped groove, and the reverse U-shaped groove penetrates the entire bottom of the electromagnet mounting base; an electromagnet gland for sealing the electromagnet mounting groove; an electromagnet mounted in the electromagnet mounting groove; and a measurement terminal, one end of which is connected to the electromagnet and the other end is exposed outside the electromagnet gland; a hopper mounted on the lower part of the frame and located below the electromagnet component. The hopper has a V-shaped part placement surface; a motion mechanism mounted on the upper part of the frame and connected to the electromagnet component, or mounted on the lower part of the frame and connected to the hopper; and a system controller electrically connected to the motion mechanism to control the motion of the motion mechanism so that the electromagnet component or the hopper makes a vertical up-and-down motion or an oblique motion with a vertical component; electrically connected to the coil of the electromagnet to output an electromagnet control signal in groups to realize simultaneous or time-sharing energization of each electromagnet; and electrically connected to the measurement terminal to detect whether there is a circuit connection between the terminals.

[0007] According to a further feature of the sucking device according to the present invention, the motion mechanism is selected from one of the following mechanisms driven by a motor: a lead screw and a lead screw nut, a gear and a rack, a pulley and a belt, a sprocket and a chain.

[0008] According to a further feature of the sucking device according to the present invention, the electromagnet is a circular electromagnet or a rectangular electromagnet.

[0009] According to a further feature of the sucking device according to the present invention, each electromagnet mounting groove can fixedly mount a single electromagnet or a plurality of electromagnet groups connected in parallel electrically.

[0010] The sucking device for ferromagnetic flexible parts according to the present invention has the following beneficial effects: (1) By adopting a specially designed V-shaped hopper, several to hundreds of ferromagnetic flexible parts (for example, spring-shaped parts) can be stacked in the hopper basically neatly at one time, which is convenient for being automatically sucked one by one. (2) Through the relative movement between the electromagnet assembly and the hopper, each electromagnet is energized simultaneously or at different times, causing the ferromagnetic soft parts in the hopper to be adsorbed in the inverted U-shaped groove at the bottom of the electromagnet assembly. At this time, the parts make electrical contact with the electromagnets, closing the circuit between adjacent electromagnets. Therefore, it is possible to detect whether the parts are adsorbed by detecting whether there is a closed circuit between the measurement terminals.

[0011] (3) It can ensure that only a single part is picked up each time, and then the part is transferred to the receiving mechanical structure by cutting off the power. It is also possible to horizontally transfer the part to other positions for subsequent processing by installing the electromagnet on a horizontal transfer mechanism, thus facilitating the realization of automated operations from part picking to positioning, improving the automation level of subsequent positioning and transfer processing, and increasing labor productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic three-dimensional structure diagram of the ferromagnetic soft part picking device described in the present invention.

[0013] Figure 2 is a front view of the ferromagnetic soft part picking device described in the present invention.

[0014] Figure 3 is Figure 2 the A-A cross-sectional view of

[0015] Figure 4 is a schematic three-dimensional structure diagram of the electromagnet assembly described in the present invention.

[0016] Figure 5 is a front view of the electromagnet assembly described in the present invention.

[0017] Figure 6 is Figure 5 the C-C cross-sectional view of

[0018] Figure 7 is Figure 5 the D-D cross-sectional view of

[0019] Reference Numerals: 1: Frame; 2: Electromagnet Assembly; 3: Hopper; 4: Movement Mechanism; 21: Mounting Plate; 22: Electromagnet Mounting Base; 23: Electromagnet Mounting Groove; 24: Inverted U-shaped Groove; 25: Electromagnet Cover; 26: Electromagnet; 27: Measurement Terminal. DETAILED DESCRIPTION OF THE INVENTION

[0020] The picking device for ferromagnetic soft parts described in the present invention, as Figures 1 to 3As shown in the figure, it includes: a frame 1, having a mounting component and a frame for the mounted component to move; an electromagnet assembly 2, mounted on the upper part of the frame 1; a hopper 3, mounted on the lower part of the frame 1, below the electromagnet assembly, and the hopper 3 has a V-shaped part placement surface; a motion mechanism 4, mounted on the upper part of the frame 1 and connected to the electromagnet assembly 2, or mounted on the lower part of the frame 1 and connected to the hopper 3.

[0021] The length of the hopper 3 is generally set according to the length of the part to be picked up. The length of the hopper 3 needs to be longer than the part, so that the parts can be placed neatly against one side basically.

[0022] As Figure 3 shown in the figure, some parts to be picked up are placed in the hopper 3 with a V-shaped structure.

[0023] As Figures 4 to 7 shown in the figure, the electromagnet assembly 2 includes: a mounting plate 21, vertically mounted on the frame 1; an insulating electromagnet mounting base 22, mounted on the lower part of the mounting plate 21; at least two mutually isolated electromagnet mounting grooves 23 are provided inside the electromagnet mounting base 22; a bottom of the electromagnet mounting base 22 is provided with an inverted U-shaped groove 24 capable of accommodating a single ferromagnetic soft part; a bottom of the electromagnet mounting groove 23 is in contact with a top of the inverted U-shaped groove 24, and the inverted U-shaped groove 24 penetrates through the bottom of the entire electromagnet mounting base 22; an electromagnet gland 25, sealing the electromagnet mounting groove 23; an electromagnet 26, mounted in the electromagnet mounting groove 23; and a measuring terminal 27, one end connected to the iron core or iron shell of the electromagnet 26, and the other end exposed outside the electromagnet gland 25.

[0024] A long strip-shaped electromagnet mounting base can be made of insulating material, and its length can be slightly less than or equal to or greater than the part length.

[0025] An inverted U-shaped groove 24 is provided along the length direction in the middle or near the bottom of the electromagnet mounting base 22. The width of the groove can just loosely embed the whole part, and the depth is slightly less than or equal to or greater than the part diameter.

[0026] Two or more electromagnet mounting grooves can be evenly provided inside the electromagnet mounting base along the length direction of the electromagnet mounting base, perpendicular to the inverted U-shaped groove. The distance between each electromagnet mounting groove is slightly larger than the diameter (for a circular electromagnet) or length (for a long-shaped electromagnet) of the electromagnet, so that the outer shells of the mounted electromagnets do not contact each other. The bottom of the electromagnet mounting groove is tangent to the top of the inverted U-shaped groove, or slightly exceeds the tangent position downward, to ensure that the part can be in electrical contact with the electromagnet when being adsorbed. The electromagnet 26 can be a circular electromagnet or a long-shaped electromagnet.

[0027] The electromagnet 26 is usually installed in the electromagnet installation groove 23 in the direction where the magnetic force lines are perpendicular downward.

[0028] Each of the electromagnet installation grooves 23 can fixedly install a single electromagnet or a group of electromagnets connected in parallel electrically. The group of electromagnets connected in parallel is regarded as one electromagnet. Hereinafter, a single electromagnet or a group of electromagnets connected in parallel will not be distinguished.

[0029] The iron core or iron shell of the electromagnet is connected with a measurement terminal for measuring the electrical contact between the electromagnet and the part.

[0030] The moving mechanism 4 can adopt a conventional moving mechanism driven by a motor, such as one selected from the following mechanisms: a lead screw and a lead screw nut, a gear and a rack, a pulley and a belt, a sprocket and a chain. These moving mechanisms can drive the electromagnet assembly or the hopper to move up and down.

[0031] The sucking device for ferromagnetic soft parts of the present invention further includes a system controller. The system controller is electrically connected to the moving mechanism 4 to control the movement of the moving mechanism 4 so that the electromagnet assembly 2 or the hopper 3 makes a vertical up-and-down movement or an inclined movement with a vertical component. The system controller is electrically connected to the coil of the electromagnet 26 and outputs an electromagnet control signal in groups to realize the simultaneous or time-sharing energization of each electromagnet 26. The system controller is electrically connected to the measurement terminal 27 to detect whether there is a circuit connection between the measurement terminals 27, and judges whether the part is adsorbed according to whether the circuits between the electromagnets are connected.

[0032] An example of the operation method of the sucking device for ferromagnetic soft parts of the present invention: Ensure that the hopper is horizontally set left and right, the electromagnet assembly is above the hopper, is arranged parallel to the hopper, and keeps a certain distance so that the parts will not be sucked up when the electromagnet starts to be energized.

[0033] Number the electromagnets as No. 1, No. 2 (and so on) from left to right, and place the parts neatly into the hopper basically. Align the left edge of the No. 1 electromagnet basically. The electromagnet and the hopper can move up and down relatively.

[0034] (I) The method for sucking parts when there are two electromagnets 1. First, energize and magnetize the two electromagnets simultaneously at full power.

[0035] 2. The moving device drives the hopper and the parts to move up slowly. Until the parts are sucked up by the electromagnet. The sucked-up parts are sucked by the two electromagnets simultaneously. Since the parts are conductors, an electrical path is formed between the two electromagnets through the parts. The controller determines whether the parts have been sucked up by measuring whether the path is achieved. At this time, more than one part may be sucked up. However, due to the inverted U-shaped groove structure, only one part directly contacts the electromagnet. Hereinafter, this part is called the first part.

[0036] 3. Cut off the voltage of the No. 1 electromagnet. At this time, most of the parts that are separated by the first part and cannot directly contact the electromagnet will fall off. The left side of the first part will droop due to gravity and leave the electromagnet.

[0037] 4. The hopper moves downward a certain distance to make the unabsorbed part of the parts bend and droop naturally by 10° to 30°.

[0038] 5. Slowly increase the voltage of the No. 1 electromagnet from zero until it just sucks the left side of the drooping first part again. Since the first part is the closest to the electromagnet, generally only the first part is sucked up at this time.

[0039] 6. Disconnect the voltage of the No. 2 electromagnet. At this time, most of the parts will fall off as a whole except for the originally sucked first part. The left half of the first part is still sucked by the No. 1 electromagnet, and the right half will droop naturally.

[0040] 7. Slowly increase the excitation voltage of the No. 2 electromagnet from zero until it just sucks. Since the first part is the closest to the electromagnet, generally only the first part is sucked up at this time.

[0041] 8. Repeat steps 3, 5, 6, and 7 one or two times to ensure that only one part is sucked. Realize the function of sucking and positioning soft spring parts.

[0042] 9. The only first part after sucking can be placed on the receiving mechanical structure by cutting off the power. It can also be horizontally transported to other parts for subsequent processing by installing the electromagnet on the horizontal transfer mechanism.

[0043] (2) Method for sucking parts when there are three electromagnets 1. First, energize and excite the No. 1 and No. 2 electromagnets at full power.

[0044] 2. The moving device drives the hopper and the parts to move slowly upward until the left ends of one or several parts below the No. 1 and No. 2 electromagnets are sucked up by the electromagnets.

[0045] 3. The hopper moves downward a certain distance to make the unabsorbed part of the parts bend and droop naturally by 10° to 30°.

[0046] 4. Energize the No. 3 electromagnet, and gradually increase the power from 0. Since the first part is the closest to the electromagnet, the first part is first sucked up by the No. 3 electromagnet. When it is detected that it is sucked, immediately stop increasing the power. At this time, the No. 3 electromagnet generally only sucks the first part, and may also suck more than one, but the number must be less than that sucked by the No. 1 and No. 2 electromagnets.

[0047] 5. Turn off the voltage of Electromagnets 1 and 2. At this time, except for the first part, the rest of the parts have basically fallen off as a whole. Only the right end of the first part is still attracted by Electromagnet 3.

[0048] 6. Conversely, increase the voltage of Electromagnet 2 until the middle of the part is attracted.

[0049] 7. Then increase the voltage of Electromagnet 1 until the left end of the part is attracted.

[0050] 8. Disconnect the voltage of the second and third groups of electromagnets, causing the right side of the part to droop.

[0051] 9. Increase the voltage of Electromagnet 2 until the middle of the part is attracted.

[0052] 10. Repeat steps 4 to 7 until the entire first part is attracted by the electromagnet assembly, achieving the purpose of completely sucking and positioning the soft spring part.

Claims

1. A suction device for ferromagnetic flexible parts, characterized in that, include: A rack (1) having a mounting assembly and a frame for the mounted assembly to move; The electromagnet assembly (2) is mounted on the upper part of the frame (1), and comprises: A mounting plate (21) vertically mounted on the frame (1); An insulated electromagnet mounting seat (22) is mounted on the lower part of the mounting plate (21); at least two mutually isolated electromagnet mounting grooves (23) are provided inside the electromagnet mounting seat (22); an inverted U-shaped groove (24) capable of accommodating a single ferromagnetic soft part is provided at the bottom of the electromagnet mounting seat (22); the bottom of the electromagnet mounting groove (23) is in contact with the top of the inverted U-shaped groove (24), and the inverted U-shaped groove (24) runs through the entire bottom of the electromagnet mounting seat (22); An electromagnet gland (25) seals the electromagnet mounting groove (23); an electromagnet (26) mounted in the electromagnet mounting groove (23); and A measuring terminal (27), one end of which is connected to the iron core or iron shell of the electromagnet (26), and the other end of which is exposed outside the electromagnet gland (25); A hopper (3) is installed at the bottom of the frame (1) and below the electromagnet assembly; the hopper (3) has a V-shaped parts placement surface; A motion mechanism (4) is installed on the upper part of the frame (1) and connected to the electromagnet assembly (2), or is installed on the lower part of the frame (1) and connected to the hopper (3); and A system controller is electrically connected to the motion mechanism (4) to control the motion of the motion mechanism (4) so ​​that the electromagnet assembly (2) or the hopper (3) moves vertically up and down or moves diagonally with a vertical component; is electrically connected to the coils of the electromagnets 26, outputs electromagnet control signals in groups to realize simultaneous or time-sharing power supply of each group of electromagnets (26), and is electrically connected to the measuring terminals to detect whether a circuit is connected between the measuring terminals (27).

2. The sucking device according to claim 1, wherein: The motion mechanism (4) is selected from one of the following mechanisms driven by a motor: a screw and a screw nut, a gear and a rack, a pulley and a belt, a sprocket and a chain.

3. The suction device according to claim 1, characterized in that: The electromagnet (26) is a round electromagnet or an elongated electromagnet.

4. The sucking device according to claim 1, wherein: Each of the electromagnet mounting grooves (23) can be used to fixedly mount a single electromagnet or a group of multiple electromagnets electrically connected in parallel.

Images