An automatic tool setting and collision measurement device

Abstract

The present application relates to the technical field of induction heating, and particularly relates to an automatic tool setting collision measuring device, which comprises a current source module, a measuring tool head, a current memory module, a current phase detection module and a phase comparison module; the current source module is used for providing alternating current to the measuring tool head; when the measuring tool head is in collision contact with a workpiece to be processed, the current source module, the measuring tool head and the workpiece to be processed form a current loop, and a short-circuit current is generated; the current memory module stores the short-circuit current generated by the current loop; the current phase detection module converts the short-circuit current signal into a direct current signal; the phase comparison module compares the converted direct current signal with a reference value, and judges whether the measuring tool head is in collision contact with the workpiece to be processed. The present application can improve the sensitivity of measuring tool setting collision in an induction heating environment, and ensure that the tool head is not damaged.

Description

Technical Field

[0001] This invention relates to the field of induction heating technology, and more specifically to an automatic tool-setting collision measurement device. Background Technology

[0002] As induction heating technology matures and its applications become more widespread, the quality of induction heating products becomes paramount. The quality of components depends primarily on precision; only high-precision parts can be assembled into high-precision equipment. The induction coil of the induction heating power supply is made of copper, which has relatively poor rigidity. During operation, the coil experiences high voltage and current. Current measuring sensors for cold working equipment are unsuitable for this application scenario and are easily damaged. Therefore, a copper inductor is used as the measuring tool, colliding with the workpiece for automatic tool setting. Automatic tool setting requires contact and collision with the workpiece to obtain a feedback signal. This presents the following problems: sensitivity during collision measurement must be ensured; a slow response will lead to severe deformation of the copper. Summary of the Invention

[0003] In view of this, the present invention provides an automatic tool-setting collision measurement device, which can improve the sensitivity of measurement during tool-setting collision under induction heating environment and ensure that the tool head is not damaged.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic tool-setting collision measurement device includes: a current source module, a measuring tool head, a current memory module, a current phase detection module, and a phase comparison module;

[0006] The current source module is used to provide alternating current to the measuring cutter head;

[0007] When the measuring cutter head collides and comes into contact with the workpiece to be processed, the current source module, the measuring cutter head, and the workpiece to be processed form a current loop and generate a short-circuit current;

[0008] The current storage module is used to store the short-circuit current generated by the current loop.

[0009] The current phase detection module is used to convert the short-circuit current signal into a DC signal.

[0010] The phase comparison module is used to compare the converted DC signal with a reference value. If the signal is greater than or equal to the reference value, it indicates that the measuring cutter head has collided and made contact with the workpiece to be processed, and a high level is output. If the signal is less than the reference value, it indicates that the measuring cutter head has not collided and made contact with the workpiece to be processed, and a low level is output.

[0011] Furthermore, the outputs of the current source module are a live wire and a neutral wire, wherein the live wire is connected to the measuring cutter head, and the neutral wire is connected to the workpiece to be processed.

[0012] Furthermore, the current storage module is connected between the current source module and the measuring tool.

[0013] Furthermore, the current source module uses a transformer to provide a stable 5V AC power.

[0014] Furthermore, the measuring device also includes: an isolation drive module and a relay;

[0015] The isolation drive module is used to control the relay contacts to engage when the phase comparison module outputs a high-level signal, and to feed back the relay contact signal to the external processing control device; the external processing control device controls the measuring tool head to stop moving according to the relay contact signal.

[0016] Furthermore, the current storage module is an inductor or a reactor.

[0017] Furthermore, the current storage module is also used to isolate the high-voltage current in the heat treatment induction heating equipment.

[0018] Furthermore, the current phase detection module employs a Hall current sensor.

[0019] Furthermore, the reference value in the phase comparison module is set to different values ​​depending on whether there is coolant.

[0020] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0021] The measuring device of this invention maintains its measurement sensitivity even when coolant is used during processing. This is because while the coolant is mostly water, it also contains organic matter. When the measuring tool contacts the workpiece, if the organic matter in the coolant separates the tool and the workpiece, insulation will occur, preventing the formation of a current loop. However, due to the skin effect of alternating current, this invention generates an arcing phenomenon, carbonizing the organic matter and thus conducting electricity to form a circuit, thereby ensuring the sensitivity of the tool measurement. If direct current is used, the insulation effect of the organic matter in the coolant will lead to inaccurate measurement results, causing the tool to continuously advance and deform under pressure.

[0022] Furthermore, based on whether coolant is used during the processing and drawing on past experience, the present invention sets the reference value of the phase comparison module to different values, which can further ensure the accuracy and sensitivity of the measuring device under different processing scenarios. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of one embodiment of the automatic tool setting collision measurement device provided by the present invention;

[0025] Figure 2 A schematic diagram of the automatic tool setting collision measurement device provided by the present invention in another embodiment. 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, this embodiment of the invention discloses an automatic tool-setting collision measurement device, including: a current source module, a measuring tool head, a current memory module, a current phase detection module, and a phase comparison module;

[0028] The current source module is used to provide AC power to the measuring tool head;

[0029] When the measuring cutter head collides and comes into contact with the workpiece to be processed, the current source module, the measuring cutter head, and the workpiece to be processed form a current loop and generate a short-circuit current;

[0030] The current storage module is used to store the short-circuit current generated by the current loop;

[0031] The current phase detection module is used to convert short-circuit current signals into DC signals;

[0032] The phase comparison module compares the converted DC signal with a preset reference value. If the value is greater than or equal to the reference value, it indicates that the measuring cutter head has collided and made contact with the workpiece to be processed, and a high level is output. If the value is less than the reference value, it indicates that the measuring cutter head has not collided and made contact with the workpiece to be processed, and a low level is output.

[0033] In induction heating equipment for heat treatment, automatic tool setting is required before heat treatment of the workpiece. After tool setting, specific parts are then subjected to targeted heat treatment. Automatic tool setting refers to collision detection between the measuring tool head and the workpiece. When a collision occurs, it indicates that the measuring tool head has reached the workpiece position, and a signal is generated. The generated signal determines whether tool setting is complete, so that the subsequent heat treatment process can begin. In this embodiment, the measuring tool head uses a copper induction coil. When the measuring tool head contacts the workpiece, a short circuit is instantly formed, generating an alternating current. The current phase detection module converts the alternating current signal into a DC voltage signal. The phase comparison module compares the currently measured voltage signal with a preset reference value to determine whether a contact collision has occurred and outputs the corresponding measurement signal. When a collision occurs, the measurement signal is fed back to the external induction heating equipment for heat treatment, thereby quickly controlling the measuring tool head to stop moving. This rapid response process avoids deformation of the copper coil.

[0034] In this embodiment, the phase comparison module can be directly connected to an external machining control device. The external machining control device controls the measuring tool head to stop or continue moving based on the level signal output by the phase comparison module.

[0035] Specifically, the reference value setting in the phase comparison module can be adjusted according to the specific processing environment. Different reference values ​​can be set depending on the processing environment. Taking the presence or absence of coolant as an example, when there is coolant, since the coolant is mostly water but also contains some organic matter, if the measuring tool head is separated from the workpiece by the coolant when it comes into contact with the workpiece, it will have a certain impact on the AC current in the circuit. As a result, the short-circuit current of the collected circuit will change compared to when there is no coolant. At this time, based on work experience, the reference value can be adjusted appropriately to achieve accurate measurement of the tool head collision signal under different processing scenarios.

[0036] In addition, when there is coolant during heat treatment, if the measuring tool is separated from the workpiece by organic matter in the coolant when the measuring tool comes into contact with the workpiece, insulation will be generated and a current loop will not be formed. If direct current is used, the insulation of the organic matter in the coolant will prevent timely measurement of the collision signal between the tool and the workpiece, causing the tool to continue to advance and deform.

[0037] This invention uses alternating current. Due to the skin effect of alternating current, an arcing phenomenon will occur, which will carbonize organic materials and then conduct electricity to form a circuit, thereby ensuring the sensitivity of the tool measurement.

[0038] In one specific embodiment, the outputs of the current source module are the live wire and neutral wire of a 5V AC power supply, with the live wire connected to the measuring tool head and the neutral wire connected to the workpiece to be processed. When the measuring tool head collides with the workpiece to be processed, the live wire and neutral wire are short-circuited, generating a momentary short-circuit current.

[0039] In other embodiments, such as Figure 2 As shown, the measuring device also includes: an isolation drive module and a relay;

[0040] The isolation drive module is used to control the relay contacts to open when the phase comparison module outputs a high-level signal, and to feed back the relay contact signal to the external machining control equipment; the external machining control equipment controls the measuring tool head to stop moving according to the relay contact signal.

[0041] In one specific embodiment, the current source module uses a transformer to provide a stable 5V AC power supply that can withstand short-circuit current. The purpose of using 5V AC power is that the arc at the AC point is longer during a short circuit, resulting in better sensitivity of the collision measurement. Furthermore, since 5V is a safe voltage, it is not enough to cause contact hazards to people, nor will it cause electric shock to the product.

[0042] The current storage module is a reactor connected in series between the current source module and the measuring tool. It has the characteristic of passing DC and blocking AC, which can isolate the high voltage and high current used in heat treatment induction heating equipment. At the same time, it can also store the short-circuit current generated after collision measurement, preventing the current sensor from being burned out.

[0043] The current phase detection module uses a Hall current sensor, which can directly convert AC current into DC component signals, so that the subsequent phase comparison module can judge its logic output results.

[0044] The phase comparison module uses an LM219DT comparator for logic judgment and can withstand large voltage and drive current.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic tool setting collision measuring device, characterized in that, include: Current source module, measuring tool, current memory module, current phase detection module, and phase comparison module; The current source module is used to provide alternating current to the measuring cutter head; When the measuring cutter head collides and comes into contact with the workpiece to be processed, the current source module, the measuring cutter head, and the workpiece to be processed form a current loop and generate a short-circuit current; The current storage module is used to store the short-circuit current generated by the current loop. The current phase detection module is used to convert the short-circuit current signal into a DC signal; The phase comparison module is used to compare the converted DC signal with a preset reference value. If it is greater than or equal to the reference value, it indicates that the measuring cutter head has collided and contacted the workpiece to be processed, and a high level is output; if it is less than the reference value, it indicates that the measuring cutter head has not collided and contacted the workpiece to be processed, and a low level is output. The reference value in the phase comparison module is set to different values ​​depending on whether there is coolant.

2. The automatic tool setting collision measuring device according to claim 1, characterized in that, The outputs of the current source module are a live wire and a neutral wire, wherein the live wire is connected to the measuring tool head and the neutral wire is connected to the workpiece to be processed.

3. The automatic tool setting collision measuring device according to claim 2, characterized in that, The current storage module is connected between the current source module and the measuring tool.

4. The automatic tool setting collision measuring device according to claim 1, characterized in that, The current source module uses a transformer to provide a stable 5V AC power.

5. The automatic tool setting collision measuring device according to claim 1, characterized in that, The measuring device also includes: an isolation drive module and a relay; The isolation drive module is used to control the relay contacts to engage when the phase comparison module outputs a high-level signal, and to feed back the relay contact signal to the external processing control device; the external processing control device controls the measuring tool head to stop moving according to the relay contact signal.

6. The automatic tool setting collision measuring device according to claim 1, characterized in that, The current storage module is a reactor.

7. The automatic tool setting collision measuring device according to claim 1, characterized in that, The current storage module is also used to isolate the high-voltage current in the heat treatment induction heating equipment.

8. The automatic tool setting collision measuring device according to claim 1, characterized in that, The current phase detection module uses a Hall current sensor.

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