Inductive turning process and device

Abstract

This invention discloses an inductive turning process, comprising the following steps: S1, electrically connecting the cutting tool, inductive controller, and workpiece to be machined; S2, insulating the cutting tool from the tool holder used to fix it; S3, aligning the workpiece and cutting tool to form a circuit between the inductive controller, cutting tool, and workpiece, and then performing turning; S4, during turning, the cutting tool contacts the machined surface of the workpiece, thus completing the circuit. When the cutting tool contacts an uneven area on the machined surface of the workpiece, a momentary disconnection occurs between the cutting tool and the workpiece, breaking the circuit; S5, determining the flatness of the workpiece or any abnormalities in the machined surface based on the number of disconnections. This invention also provides a turning apparatus for performing the above turning process. When the workpiece surface to be machined is uneven, the cutting tool and workpiece will momentarily disconnect, causing the inductive controller to provide an abnormal alarm, or allowing the workpiece to be pre-judged as qualified based on the number of disconnections.

Description

Technical Field

[0001] This invention relates to the field of friction welding technology, and in particular to an induction turning process and apparatus. Background Technology

[0002] Friction welding works by breaking down the oxide film on the metal surface through friction. The friction generates heat, reducing the metal's strength and increasing its plasticity. The friction causes plastic deformation and flow in the metal, preventing oxidation and promoting the interdiffusion of metal atoms, resulting in a strong weld joint. Therefore, a smooth, oxide-free metal surface is required; uneven surfaces need to be machined before friction welding. Currently, during machining, the lack of real-time monitoring or detection of surface smoothness easily leads to over-machining and material waste, or improper mounting of the workpiece on the fixture, resulting in workpiece scrap after machining. Therefore, there is an urgent need for a process or device that can monitor or determine the real-time smoothness of the metal surface during machining. Summary of the Invention

[0003] The purpose of this invention is to provide an induction turning process and apparatus to overcome the shortcomings of the above-mentioned technologies.

[0004] This invention provides an induction turning process, the process steps of which are as follows:

[0005] S1, connect the cutting tool to one pole of the inductor controller, and connect the workpiece to be processed to the other pole of the inductor controller;

[0006] S2, Insulate the cutting tool from the tool holder used to fix the cutting tool;

[0007] S3, perform tool setting on the workpiece and the cutting tool to make the inductor controller, the cutting tool and the workpiece conduct to form a circuit, and then perform turning machining;

[0008] S4, During the turning process, the tool contacts the machined surface of the workpiece, thus making the circuit conductive. When the tool contacts the uneven surface of the workpiece, the tool and the workpiece are momentarily disconnected, thus breaking the circuit.

[0009] S5 determines the abnormal condition of the workpiece's machined surface based on the number of disconnections.

[0010] Preferably, the inductor controller receives and displays or prompts a disconnection signal to form a visual warning.

[0011] Preferably, the turning path of the workpiece surface is a spiral path.

[0012] Further optimization involves using the center point of the workpiece's surface to be machined as the starting point of the turning path.

[0013] Further optimization involves making the workpiece surface to be processed either a plane or a curved surface.

[0014] As a preferred method, the workpiece is judged to be qualified based on the preset power-off frequency.

[0015] Preferably, abnormalities on the workpiece machining surface include bumps and depressions on the machining surface, improper installation of the workpiece into the fixture resulting in tilting of the machining surface, and chipping of the tool tip preventing the workpiece from being machined.

[0016] The present invention also provides a turning apparatus for performing induction turning, comprising a lathe body, a tool post on the lathe body, a tool mounted on the tool post, a rotating fixture on the lathe body for holding a workpiece to be processed, an inductive controller between the tool and the workpiece, and an electrical connection between the inductive controller, the tool and the workpiece, wherein the circuit is formed when the tool is in contact with the workpiece, and an open circuit is formed when the tool is not in contact with the workpiece.

[0017] The technical advantages of this invention are as follows: During the turning process, the workpiece rotates with the fixture, and the cutting tool must contact the surface to be machined on the workpiece to perform the turning operation. An electrical connection circuit is formed between the cutting tool, the workpiece, and the inductor controller. When the surface to be machined on the workpiece is flat, the cutting tool and the workpiece contact each other and form a path. When the surface to be machined on the workpiece is uneven, the cutting tool and the workpiece will momentarily disconnect, thus forming an open circuit. The inductor controller receives and feeds back the disconnection signal, providing an abnormal alarm, or allowing the workpiece to be pre-judged as qualified or unqualified based on the number of disconnections. The cutting tool uses a spiral path trajectory for machining, which is projected into a visual spiral pattern diagram. When in a disconnected pattern segment, different colors or thicknesses can be used to mark it. Each disconnection mark combination forms a complete disconnection path, ultimately forming a visual complete uneven overall outline. The size and shape of the defect are determined by different outlines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an induction turning device (the machined surface is a flat end);

[0019] Figure 2 This is a schematic diagram of the structure of an induction turning device (the machined surface is a curved end);

[0020] Figure 3 It is a schematic diagram of the trajectory of the cutting tool cutting a spiral path;

[0021] Figure 4 It is a photograph of the workpiece surface when the first type of abnormality exists.

[0022] Figure 5 This is a schematic diagram of the spiral trajectory under the first abnormal situation;

[0023] Figure 6 It is a photograph of a workpiece when the second type of abnormality exists on its surface.

[0024] Figure 7 These are photos of the actual product after normal machining.

[0025] In the diagram: 1. Cutting tool; 2. Inductor controller; 3. Workpiece; 4. Tool holder; 5. Starting point; 6. End point; 7. Dent; 8. Unturned area; 9. Fixture; 10. Insulation layer; 11. Spindle. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0027] This invention discloses an inductive turning device, which includes a lathe body, a tool post 4 on the lathe body, a turning tool 1 mounted on the tool post 4, a rotating spindle 11 on the lathe body, and a clamp 9 at the end of the spindle 11 that rotates with the spindle 11. The clamp 9 is used to clamp the workpiece 3 to be processed. An inductive controller 2 is provided between the tool 1 and the workpiece 3. An electrical connection is formed between the inductive controller 2, the tool 1 and the workpiece 3. In this embodiment, the inductive controller 2, the tool 1 and the workpiece 3 are connected by a wire. When the workpiece 3 rotates under the drive of the spindle 11 and the clamp 9 and comes into contact with the tool 1, the inductive controller 2, the tool 1 and the workpiece 3 are connected in series to form a circuit. When the tool 1 separates from the workpiece 3, an open circuit is formed between the inductive controller 2, the tool 1 and the workpiece 3. The inductive controller 2 is used to detect the current conduction and give a corresponding signal, which is transmitted to the PLC module. The PLC module then feeds back the signal to the AC contactor, so that the AC contactor issues relevant information about conduction or disconnection.

[0028] The cutting tool 1, fixture 9 and workpiece mentioned above are all made of conductive materials. In this embodiment, workpiece 3 is made of copper.

[0029] In this embodiment, the cutting tool 1 and the tool holder 4 are insulated, that is, an insulating layer 10 is added between the cutting tool 1 and the tool holder 4 for isolation, so that the cutting tool 1 and the punch press body are insulated.

[0030] In this embodiment, the inductor controller 2 and the workpiece 3 are connected by a wire. One end of the wire is connected to one pole of the inductor controller 2, and the other end is connected to the workpiece 3 after passing through the spindle 11 of the punch press body and the fixture 9. When the workpiece 3 is installed on the fixture 9, the workpiece 3 contacts and connects with the guide end, that is, the workpiece 3 and the end of the wire are coupled and connected. The specific connection or coupling method is not described here.

[0031] The specific steps of the turning process using the aforementioned turning apparatus are as follows:

[0032] S1. First, install the cutting tool 1 on the tool holder 4, install the workpiece 3 to be processed on the fixture 9, connect the cutting tool 1 to one pole of the inductor controller 2, and connect the workpiece 3 to the other pole of the inductor controller 2. In this embodiment, the cutting tool 1 is connected to the positive pole of the inductor controller 2 through a wire; the workpiece 3 is connected to the negative pole of the inductor controller 2 through another wire.

[0033] S2, the cutting tool 1 and the tool holder 4 used to fix the cutting tool 1 are insulated. In this embodiment, an insulating layer 10 can be added between the cutting tool 1 and the tool holder 4, and the wire is directly connected to the cutting tool 1 to avoid the cutting tool 1 from conducting electricity with the tool holder 4 and the lathe body.

[0034] S3, the workpiece 3 and the tool 1 are set. When the tool 1 contacts the workpiece 3, the inductor controller 2, the tool 1 and the workpiece 3 are connected to form a circuit, and then the turning process is performed.

[0035] S4, during the turning process, the tool 1 contacts the machined surface of the workpiece 3, thus making the circuit conductive. When the tool 1 contacts the uneven part of the machined surface of the workpiece 3, especially when there is a pit 7 on the machined surface of the workpiece 3, when the machining tip of the tool 1 passes through the pit 7, the tool 1 and the workpiece 3 do not contact each other. At this time, the tool 1 and the workpiece 3 form a momentary disconnection, thus breaking the circuit. When the workpiece 3 continues to rotate, the machining tip of the tool 1 continues to contact the flat part of the machined surface of the workpiece 3, thus re-establishing the circuit between the tool 1 and the workpiece 3. The inductor controller 2 senses the signal when the circuit is disconnected and generates a preload or alarm, which is directly displayed.

[0036] As workpiece 3 rotates, the turning path on the machined surface of workpiece 3 forms a complete spiral shape, such as... Figure 2 As shown, the starting point 5 is the center point of the surface of the workpiece 3, and the ending point 6 is the edge of the surface of the workpiece 3 to be processed. The inductor controller 2 or another display device displays a schematic diagram of the spiral pattern. In this embodiment, when the circuit is broken, the corresponding spiral segment will display different colors or thicknesses, so as to distinguish it from the pattern display when the circuit is connected. Finally, the specific abnormal position and shape of the surface of the workpiece 3 can be displayed intuitively, thereby determining whether the workpiece 3 is qualified.

[0037] S5, the flatness of workpiece 3 or the abnormality of the machined surface of workpiece 3 is determined based on the number of disconnections. Thus, the quality of workpiece 3 after turning is determined based on the number of disconnections. The specific number of determinations can be adjusted according to the actual working conditions, so as to effectively identify various abnormalities on the surface of workpiece 3.

[0038] The surface abnormalities of workpiece 3 mainly include three types:

[0039] 1. The machined surface has uneven pits 7 and protrusions. When the machining tip of the tool 1 passes through the pits 7 and protrusions, the tool 1 and the workpiece 3 will briefly separate. At this time, the circuit is broken, and the inductor controller 2 senses the disconnection signal. Figure 3 , 4 As shown, two different shapes of pits 7 are generated on the surface of workpiece 3. During the turning process, when the tool 1 passes through the pit 7, it does not contact the surface of workpiece 3. At this time, the circuit is broken and the inductor controller 2 generates a disconnection signal.

[0040] 2. Improper installation of workpiece 3 onto fixture 9 results in a tilted machining surface. This situation is used to determine whether workpiece 3 is properly installed. Figure 5 As shown, due to improper installation, there is a part of the surface of workpiece 3 that has not been machined, forming an unmachined part 8.

[0041] 3. During the turning process, when the tip of the tool 1 breaks, the surface of the workpiece 3 is not in contact with the tool. At this time, if the spiral trajectory pattern shows continuous color or abnormal thickness, it can be determined that the tool is damaged.

[0042] like Figure 2 As shown, the inductor controller 2 receives and displays or prompts a disconnection signal, forming an intuitive turning trajectory, which facilitates the identification and judgment of abnormal conditions on the machined surface of the workpiece 3.

[0043] Specifically, regarding the first type of abnormal situation, namely the attached... Figure 4 As shown, its defect is a long, narrow pit 7. When the tool 1 turns along the spiral path, a circuit will be broken every time it passes the pit 7. The inductor controller 2 records the circuit break signal and forms a schematic diagram of the spiral path. The trajectory of the pit 7 is processed with different colors or thicknesses, thereby displaying the outline of the entire pit 7 and forming a very intuitive visual texture diagram.

[0044] In addition, for example, if the preset power-off frequency is less than 6 times, the overall flatness of the machined surface is judged to be good, and the workpiece is judged to be qualified; if the preset power-off frequency is greater than or equal to 6 times, the machined surface is judged to be unqualified.

[0045] In addition, the turning process of the present invention can remove the oxide layer on the surface of the workpiece 3 when the oxide layer on the surface of the workpiece 3 is uneven, so as to achieve quick and convenient processing and inspection.

[0046] The above workpiece is a cylindrical workpiece, and the surface to be processed is the end face of one end, that is, a plane. Of course, the surface to be processed can also be the outer peripheral surface of the cylindrical workpiece, that is, a curved surface.

[0047] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. An induction turning process, characterized in that, The process steps are as follows: S1, connect the cutting tool (1) to one pole of the inductor controller (2) and connect the workpiece (3) to be processed to the other pole of the inductor controller (2); S2, the cutting tool (1) is insulated from the tool holder (4) used to fix the cutting tool (1); S3, the workpiece (3) and the cutting tool (1) are set together so that the inductor controller (2), the cutting tool (1) and the workpiece (3) are connected to form a circuit for turning. S4, during the turning process, the tool (1) contacts the machining surface of the workpiece (3) to make the circuit open. When the tool (1) contacts the uneven surface of the workpiece (3), the tool (1) and the workpiece (3) are momentarily disconnected, thus breaking the circuit. S5, determine the abnormal condition of the workpiece (3) machining surface based on the number of disconnections.

2. The induction turning process according to claim 1, characterized in that, The inductor controller (2) receives and displays or prompts a disconnection signal to form a visual warning.

3. The induction turning process according to claim 1, characterized in that, The turning path of the workpiece (3) is a spiral path.

4. The induction turning process according to claim 3, characterized in that, The center point of the surface to be machined on the workpiece (3) is the starting point of the turning path (5).

5. An inductive turning process according to claim 4, characterized in that The surface of the workpiece (3) to be processed is either a plane or a curved surface.

6. The induction turning process according to claim 1, characterized in that, By setting the power-off frequency, the workpiece (3) is determined to be qualified based on the power-off frequency.

7. The induction turning process according to claim 1, characterized in that, Abnormalities on the workpiece (3) machining surface include bumps on the machining surface, improper installation of the workpiece (3) onto the fixture (9) resulting in tilting of the machining surface, and the tool tip (1) breaking and failing to machine the workpiece.

8. An inductive turning apparatus of the inductive turning process according to any one of claims 1 to 7, characterized in that, The lathe includes a lathe body, on which a tool post (4) is provided, on which a cutting tool (1) is mounted, and on which a rotating fixture (9) is provided, the fixture (9) being used to hold a workpiece (3) to be processed. An inductor controller (2) is provided between the cutting tool (1) and the workpiece (3), and the inductor controller (2), the cutting tool (1), and the workpiece (3) are electrically connected. When the cutting tool (1) is in contact with the workpiece (3), a circuit is formed; when the cutting tool (1) is not in contact with the workpiece (3), an open circuit is formed.

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