Profiling sensing device and profiling sensing method

Abstract

The invention discloses a profiling induction device and a profiling induction method, and relates to the technical field of induction hardening, the profiling induction device comprises a bearing main body and a copper ring arranged on the outer side of the bearing main body, and the copper ring is provided with an induction boss matched with a tooth groove of an inner gear ring. The adjustment range can be extended through the attraction reaction of the main magnetic block to the bottom surface of the tooth groove, for example, when the gap between the end face of the copper plate at the rear end of the induction boss and the tooth groove bottom of the inner gear ring is within the range of 4-5 mm, the main magnetic block is attracted by the bottom surface of the tooth groove. The gap between the end face of the copper plate and the tooth groove bottom of the inner tooth ring is larger than 5 mm, the main magnetic block is not attracted by the tooth groove bottom face, and the copper plate is pushed to be close to the tooth groove bottom by means of the pressure of water flowing out of the drainage holes till the range of 4-5 mm. That is to say, the extended adjustable range depends on the pushing distance of the copper plate and can be selected to be 3mm, that is, the gap between the profiling induction device and the inner gear ring can be set within the range of 4-8mm. Therefore, the device has the advantage that the control difficulty of the gap between the profiling induction device and the inner gear ring is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of induction hardening technology, and in particular to a contour induction device and a contour induction method. Background Art

[0002] As a crucial component in the wind power industry, the gearbox has seen increasing demands as wind turbine gearboxes have evolved to 5 MW, 7 MW, and even 10 MW and above. The requirements for its key component, the internal gear ring, have also risen. It now requires low-carbon alloy carburized steel, carburized and quenched, with a Rockwell hardness of HRC 58-63.

[0003] The machining methods for internal gear rings include forging, normalizing, rough turning to remove black scale, flaw detection, rough turning, gear opening, stress relief, semi-finish turning, gear milling, carburizing, induction hardening, finish turning, and gear grinding.

[0004] Currently, the internal gear rings used in wind power are generally 3000mm in diameter and have a module of 31. According to the ISO 6336 standard, for internal gear rings with a module greater than 16, it is required to use a contour induction device for induction hardening.

[0005] Existing contour sensing devices such as Figure 1 As shown, when the internal gear ring 1 is subjected to induction hardening, an alternating current of a certain frequency flows through the coil structure 2 of the contour induction device, causing the coil structure 2 to generate a magnetic field. The teeth and grooves of the internal gear ring 1 receive an effective intensity of induced magnetic field, forming induced eddy currents within a certain depth of the teeth and grooves, thereby heating and hardening.

[0006] The gap between the coil structure 2 of the contour induction device and the internal gear ring 1 is generally controlled at 3mm-5mm. Before induction hardening, the internal gear ring is milled with a grindable allowance, because the teeth of the internal gear ring will deform after hardening and require subsequent precision turning and grinding. Therefore, after milling the internal gear ring, the tooth groove will generally retain a grinding allowance of about 0.7mm.

[0007] In actual gear milling operations, machining the tooth groove bottom of the internal gear ring is quite difficult (due to the large size of the internal gear ring, it is difficult to measure the groove bottom depth with vernier calipers, and the radial feed calculation accuracy is inaccurate). Therefore, after milling with gear milling equipment, it is not possible to effectively mill the tooth groove bottom of the internal gear ring to the same allowance. In other words, there will be machining errors, resulting in some tooth groove bottom allowances being 1.1mm, while others may be 1.8mm, 1.9mm, etc. (the tolerance range is no greater than 1mm). The gap between the contour sensing device and the internal gear ring is generally controlled at 3mm-5mm, while the grinding allowance difference between different tooth groove bottoms of the internal gear ring can reach at least 0.7mm. This means that the gap between the contour sensing device and the tooth groove bottom of the internal gear ring can only be controlled at 3.7mm-5mm, or even 4mm-5mm, which greatly increases the difficulty of controlling the gap between the contour sensing device and the internal gear ring. Summary of the Invention

[0008] One of the objectives of this invention is to solve the problem that after milling the internal gear ring, errors will occur between the bottoms of multiple tooth grooves of the internal gear ring, thereby increasing the difficulty of controlling the gap between the contour sensing device and the internal gear ring.

[0009] The second objective of this invention is to provide a contour sensing method.

[0010] To achieve one of the above objectives, the present invention adopts the following technical solution: a contour sensing device, comprising a supporting body and a copper ring disposed on the outside of the supporting body, wherein the copper ring is provided with a sensing boss that cooperates with the tooth groove of the inner tooth ring.

[0011] The sensing boss has a water spray hole on its side, and an insulating material is provided between the water spray hole and the sensing boss. An insulating block is inserted in the middle of the sensing boss, dividing the copper sensing boss into left and right halves. The insulating block has a water inlet hole, and the water spray hole is connected to the water inlet hole.

[0012] A copper plate is slidably embedded at the rear end of the sensing boss, and the copper plate contacts the sensing boss, which forms two halves.

[0013] The copper plate serves as the electrical connection component for the left and right sensing bosses, and as a component for generating a magnetic field.

[0014] The sensing protrusion is provided with a reaction plate, which is made of insulating material. A main plug is slidably disposed inside the reaction plate. A groove is provided on the side end of the main plug. The side wings of the main plug are embedded in the groove. A drain hole communicating with the water inlet is provided in the groove.

[0015] The reaction plate has a telescopic groove at its rear end, and the embedded rod of the copper plate is slidably and sealingly connected to the telescopic groove, which is in communication with the sliding groove.

[0016] The main magnetic block is fixed at the rear end of the main plug, and the circumferential edge of the main magnetic block overlaps the side platform of the embedded rod.

[0017] The main plug has a fixed auxiliary magnetic block at its front end. The reaction plate has a metal block located behind the auxiliary magnetic block. The auxiliary magnetic block and the metal block are attracted to each other.

[0018] When the contour sensing device is located within the internal gear ring, the main magnetic block, attracted by the tooth groove surface of the internal gear ring, overcomes the attraction between the auxiliary magnetic block and the metal block, and pulls the main plug and the auxiliary magnetic block backward together.

[0019] The main plug has a hollow structure, and a current signal transmitter fixed to the reaction plate is provided in the hollow structure. The current signal transmitter is connected to an external control system. The impact force generated by the backward sliding of the main plug triggers the current signal transmitter to send a signal to the external control system, so that the external control system energizes the copper ring and the copper sensing boss.

[0020] Furthermore, in this embodiment of the invention, the supporting body is provided with a lifting connection end at its center, and the lifting connection end is connected to a lifting device, through which the supporting body is pushed to move up and down.

[0021] Furthermore, in this embodiment of the invention, the supporting body is provided with a water supply port, which is connected to the water inlet hole.

[0022] Furthermore, in this embodiment of the invention, the rear end of the main magnetic block extends into the opening of the copper plate and is flush with the rear end surface of the copper plate.

[0023] Furthermore, in this embodiment of the invention, magnetic conductive sheets are installed at the upper and lower ends of the copper ring.

[0024] Furthermore, in this embodiment of the invention, magnetic conductors are installed at the upper and lower ends of the sensing protrusion.

[0025] Both the magnetic sheet and the magnetic body are made of magnetically conductive material. The magnetically conductive material enables the magnetic field generated by the energization of the copper ring and the induction boss to spread along the direction of the internal gear ring, thereby improving the quenching quality.

[0026] Furthermore, in this embodiment of the invention, the current signal transmitter includes a piezoelectric material, with electrode plates disposed between the piezoelectric materials, and the current signal transmitter is provided with lead terminals connected to the electrode plates, the lead terminals being connected to an external control system.

[0027] An insulating layer is provided around the piezoelectric material, a weight block is placed against the front end of the piezoelectric material, a pressure pin is slidably installed at the front end of the weight block, and a spring is provided between the weight block and the pressure pin.

[0028] The beneficial effects of the present invention are:

[0029] In this invention, the adjustment range can be extended by the attraction reaction of the main magnetic block to the bottom surface of the tooth groove. For example, when the gap between the end face of the copper plate at the rear end of the sensing boss and the bottom of the tooth groove of the inner tooth ring is within the range of 4mm-5mm, the main magnetic block is attracted by the bottom surface of the tooth groove. However, when the gap between the end face of the copper plate and the bottom of the tooth groove of the inner tooth ring is greater than 5mm, the main magnetic block is not attracted by the bottom surface of the tooth groove, and the copper plate is pushed closer to the bottom of the tooth groove by the water pressure flowing out of the drain hole, until it reaches the range of 4mm-5mm. That is to say, the extended adjustable range depends on the distance that the copper plate can be pushed, which can be selected as 3mm. That is, the gap between the contour sensing device and the inner tooth ring can be set in the range of 4mm-8mm. Therefore, the advantage of this invention is that it greatly reduces the difficulty of controlling the gap between the contour sensing device and the inner tooth ring.

[0030] To achieve the second objective mentioned above, the present invention adopts the following technical solution: a contour sensing method, wherein the contour sensing method is based on the contour sensing device described in one of the above objectives, and the contour sensing method includes the following steps:

[0031] When performing induction hardening, the contour induction device is placed inside the inner gear ring, so that the induction boss is located in the tooth groove of the inner gear ring.

[0032] At the same time, if the main magnetic block in the reaction plate on the sensing boss senses the internal gear ring, the main magnetic block, under the attraction of the bottom surface of the tooth groove of the internal gear ring, overcomes the attraction between the auxiliary magnetic block and the metal block in the reaction plate, and pulls the main plug and the auxiliary magnetic block backward together. The side wing of the main plug seals the drain hole, and the main plug hits the current signal transmitter, triggering the current signal transmitter to send a signal to the external control system, so that the external control system energizes the copper ring and the copper sensing boss.

[0033] When the copper ring and the copper induction boss are energized, a magnetic field is generated, and an induced current is generated on the tooth surface of the inner tooth ring, which causes induced eddy currents to form in the teeth and tooth grooves, heating the tooth and tooth groove surfaces.

[0034] Next, water is introduced into the inlet hole of the induction boss, so that the water flows into the induction boss from the inlet hole and sprays out from the spray hole, spraying onto the inner gear ring for quenching.

[0035] If the contour sensing device is placed inside the inner toothed ring, and the main magnetic block is not attracted by the bottom surface of the tooth groove, then part of the water flow from the inlet hole enters the drain hole, and the water flow from the drain hole then enters the telescopic groove to push the inner rod, causing the copper plate to extend and approach the bottom surface of the tooth groove. The copper plate is still in contact with the sensing boss.

[0036] The ring edge of the main magnetic block overlaps with the side platform of the embedded rod. Therefore, when the embedded rod is pushed, it moves the main magnetic block backward together until the main magnetic block is attracted by the bottom surface of the tooth groove of the internal gear ring, pulling the side wing of the main plug to seal the drain hole and pulling the main plug to strike the current signal transmitter, causing the current signal transmitter to send a signal to the external control system, so that the external control system energizes the copper ring and the copper induction boss to achieve induction hardening.

[0037] After induction hardening is completed, the contour induction device disengages from the inner gear ring, and the main magnetic block is no longer attracted by the bottom surface of the tooth groove of the inner gear ring. At this time, the auxiliary magnetic block is attracted by the metal block, which drives the main magnetic block and the main plug to reset.

[0038] If the copper plate moves backward, when the main magnetic block resets, the ring edge on the side of the main magnetic block will drive the inner rod to pull the copper plate back to its original position.

[0039] Furthermore, in this embodiment of the invention, during the above steps, when heating the tooth and tooth groove surfaces, the contour induction device moves up and down under the action of the lifting device to complete the induction hardening of the entire internal gear ring.

[0040] Furthermore, in this embodiment of the invention, in the above steps, when the current signal transmitter is impacted, the contact pin of the current signal transmitter transmits pressure to the counterweight. Afterward, the contact pin is reset by the action of the spring, and the counterweight is subjected to force to deform the piezoelectric material, causing polarization inside the piezoelectric material. Correspondingly, an electric charge is generated on the surface of the piezoelectric material. Due to surface leakage, the charge is conducted to the electrode sheet, then to the lead terminal, and finally received by the external control system. Attached Figure Description

[0041] Figure 1 This is a top view schematic diagram of an existing contour sensing device.

[0042] Figure 2 This is a top view schematic diagram of the contour sensing device according to an embodiment of the present invention.

[0043] Figure 3 This is a partial schematic diagram of the contour sensing device according to an embodiment of the present invention.

[0044] Figure 4 This is a three-dimensional schematic diagram of the sensing boss according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the reaction plate in an embodiment of the present invention.

[0046] Figure 6 This is a schematic diagram of a current signal transmitter according to an embodiment of the present invention.

[0047] 1. Internal gear ring; 2. Coil structure;

[0048] 10. Supporting body; 11. Lifting connection end; 12. Water supply port; 13. Magnetic guide sheet; 14. Magnetic conductor.

[0049] 20. Copper ring; 21. Induction boss; 22. Copper plate; 221. Embedded rod; 23. Water inlet; 24. Water spray hole;

[0050] 30. Reaction plate; 31. Main plug; 32. Side wing; 33. Drain hole; 34. Main magnetic block; 341. Ring edge; 35. Secondary magnetic block; 36. Metal block.

[0051] 40. Current signal transmitter; 41. Piezoelectric material; 42. Electrode sheet; 43. Lead terminal; 44. Insulating layer; 45. Counterweight; 46. Contact pin. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0053] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0055] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known contour sensing methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0056] Example 1:

[0057] It should be noted that the accompanying drawings are part of the content of the instruction manual. The structural shapes, connections, fits, and positional relationships that can be clearly seen in the accompanying drawings should all be understood as part of the content of the instruction manual.

[0058] A kind of shape-sensing device, such as Figure 2 , Figure 3 As shown, it includes a support body 10 and a copper ring 20 located on the outside of the support body 10. The copper ring 20 is provided with a sensing boss 21 that cooperates with the tooth groove of the inner tooth ring 1.

[0059] like Figure 4 As shown, the sensing boss 21 has a water spray hole 24 on its side. There is an insulating material between the water spray hole 24 and the sensing boss 21. An insulating block is inserted in the middle of the sensing boss 21, which divides the copper sensing boss 21 into left and right halves. The insulating block has a water inlet hole 23, and the water spray hole 24 is connected to the water inlet hole 23.

[0060] like Figure 4 , Figure 5 As shown, a copper plate 22 is slidably embedded in the rear end of the sensing boss 21, and the copper plate 22 is in contact with the sensing boss 21 which forms two halves.

[0061] The copper plate 22 is an electrical connection component for the left and right sensing bosses 21, and a component for generating a magnetic field.

[0062] like Figure 5 As shown, a reaction plate 30 is provided on the sensing boss 21. The reaction plate 30 is made of insulating material. A main plug 31 is slidably arranged inside the reaction plate 30. A sliding groove is provided on the side end of the main plug 31. The side wings 32 of the main plug 31 are embedded in the sliding groove. A drain hole 33 communicating with the water inlet hole 23 is provided in the sliding groove.

[0063] The reaction plate 30 has a telescopic groove at its rear end. The embedded rod 221 of the copper plate 22 is slidably and sealingly connected to the telescopic groove, and the telescopic groove is connected to the sliding groove.

[0064] The main plug 31 has a main magnetic block 34 fixed at its rear end, and the ring edge 341 on the side of the main magnetic block 34 overlaps the side platform of the inner rod 221.

[0065] The main plug 31 has a fixed auxiliary magnetic block 35 at its front end. The reaction plate 30 has a metal block 36 located behind the auxiliary magnetic block 35. The auxiliary magnetic block 35 and the metal block 36 attract each other.

[0066] When the contour sensing device is located in the inner gear ring 1, the main magnetic block 34, under the attraction of the tooth groove surface of the inner gear ring 1, overcomes the attraction between the auxiliary magnetic block 35 and the metal block 36, and pulls the main plug 31 and the auxiliary magnetic block 35 to move backward together.

[0067] The main plug 31 has a hollow structure, and a current signal transmitter 40 fixed to the reaction plate 30 is provided in the hollow structure. The current signal transmitter 40 is connected to the external control system. The impact force generated by the backward sliding of the main plug 31 triggers the current signal transmitter 40 to send a signal to the external control system, so that the external control system energizes the copper ring 20 and the copper induction boss 21.

[0068] It should be noted that since the external control system is a conventional technology in the existing field and has not been improved, it will not be explained in detail.

[0069] Implementation steps:

[0070] When performing induction hardening, the contour induction device is placed inside the inner gear ring 1, so that the induction boss 21 is located in the tooth groove of the inner gear ring 1.

[0071] At the same time, if the main magnetic block 34 in the reaction plate 30 on the sensing boss 21 senses the inner toothed ring 1, the main magnetic block 34, under the attraction of the bottom surface of the tooth groove of the inner toothed ring 1, overcomes the attraction between the auxiliary magnetic block 35 and the metal block 36 in the reaction plate 30, and pulls the main plug 31 and the auxiliary magnetic block 35 to move backward together. The side wing 32 of the main plug 31 seals the drain hole 33. The main plug 31 hits the current signal transmitter 40, triggering the current signal transmitter 40 to send a signal to the external control system, so that the external control system energizes the copper ring 20 and the copper sensing boss 21.

[0072] When the copper ring 20 and the copper induction boss 21 are energized, a magnetic field is generated, and an induced current is generated on the tooth surface of the inner tooth ring 1, which causes induced eddy currents to form in the tooth and tooth groove, heating the tooth and tooth groove surfaces.

[0073] Next, water is introduced into the water inlet 23 of the induction boss 21, so that the water flows into the induction boss 21 from the water inlet 23 and sprays out from the water spray hole 24, spraying onto the inner gear ring 1 for quenching.

[0074] If the contour sensing device is placed inside the inner toothed ring 1, and the main magnetic block 34 is not attracted by the bottom surface of the tooth groove, then part of the water flow entering the water inlet 23 enters the water outlet 33, and the water flow out of the water outlet 33 then enters the telescopic groove to push the embedded rod 221, causing the copper plate 22 to extend close to the bottom surface of the tooth groove, and the copper plate 22 is still in contact with the sensing boss 21.

[0075] The ring edge 341 on the side of the main magnetic block 34 overlaps the side platform of the embedded rod 221. Therefore, when the embedded rod 221 is pushed, it drives the main magnetic block 34 to move backward together until the main magnetic block 34 is attracted by the bottom surface of the tooth groove of the internal gear ring 1, pulling the side wing 32 of the main plug 31 to seal the drain hole 33, and pulling the main plug 31 to hit the current signal transmitter 40, so that the current signal transmitter 40 sends a signal to the external control system, so that the external control system energizes the copper ring 20 and the copper induction boss 21 to achieve induction hardening.

[0076] After induction hardening is completed, the contour induction device disengages from the inner gear ring 1, and the main magnetic block 34 is no longer attracted by the bottom surface of the tooth groove of the inner gear ring 1. At this time, the auxiliary magnetic block 35 is attracted by the metal block 36, which drives the main magnetic block 34 and the main plug 31 to reset.

[0077] If the copper plate 22 moves backward, when the main magnetic block 34 is reset, the ring edge 341 on the side of the main magnetic block 34 will drive the inner rod 221 to pull the copper plate 22 to reset together.

[0078] In the existing technology, when the difference in grinding allowance between the bottom of the tooth groove reaches 1mm, the gap between the original contour sensing device and the inner tooth ring 1 can generally only be adjusted within the range of 4mm-5mm.

[0079] In this invention, the adjustment range can be extended by the attraction reaction of the main magnetic block 34 to the bottom surface of the tooth groove. For example, when the gap between the end face of the copper plate 22 at the rear end of the sensing boss 21 and the bottom of the tooth groove of the inner tooth ring is in the range of 4mm-5mm, the main magnetic block 34 is attracted by the bottom surface of the tooth groove. When the gap between the end face of the copper plate 22 and the bottom of the tooth groove of the inner tooth ring is greater than 5mm, the main magnetic block 34 is not attracted by the bottom surface of the tooth groove, and the copper plate 22 is pushed closer to the bottom of the tooth groove by the pressure of the cooling water until it reaches the range of 4mm-5mm. That is to say, the extended adjustable range depends on the distance that the copper plate 22 can be pushed, which can be selected as 3mm (for example). That is, the gap between the contour sensing device and the inner tooth ring 1 can be set in the range of 4mm-8mm. Therefore, the advantage of this invention is that it greatly reduces the difficulty of controlling the gap between the contour sensing device and the inner tooth ring 1.

[0080] It should be noted that the magnetic field strength of the main magnetic block 34 depends on its material, volume and shape. The requirement for the main magnetic block 34 is only within 5 mm (inclusive) of the bottom of the tooth groove of the inner tooth ring 1. At this time, the main magnetic block 34 must overcome the attraction of the auxiliary magnetic block 35 to the metal block 36. The operation to complete this requirement is simple for those skilled in the art and does not require creative labor, so it will not be explained in detail.

[0081] Specifically, if Figure 2 As shown, the supporting body 10 has a lifting connection end 11 at its center. The lifting connection end 11 is connected to a lifting device (not shown), and the lifting device pushes the supporting body 10 to move up and down.

[0082] Specifically, if Figure 2 , Figure 4 As shown, the supporting body 10 is provided with a water supply port 12, which is connected to the water inlet hole 23.

[0083] Specifically, if Figure 3 As shown, the rear end of the main magnetic block 34 extends into the opening of the copper plate 22 and is flush with the rear end surface of the copper plate 22.

[0084] Specifically, if Figure 4 As shown, magnetic plates 13 are installed at the upper and lower ends of the copper ring 20. Magnetic conductors 14 are installed at the upper and lower ends of the induction boss 21.

[0085] Both the magnetic sheet 13 and the magnetic body 14 are made of magnetic materials. The magnetic materials enable the magnetic field generated by the energization of the copper ring 20 and the induction boss 21 to spread along the direction of the internal gear ring 1, thereby improving the quenching quality.

[0086] Specifically, if Figure 5 As shown, the current signal transmitter 40 includes a piezoelectric material 41, with electrode plates 42 disposed between the piezoelectric materials 41. The current signal transmitter 40 is provided with lead terminals 43 connected to the electrode plates 42, and the lead terminals 43 are connected to an external control system.

[0087] An insulating layer 44 is provided around the piezoelectric material 41, a weight block 45 abuts against the front end of the piezoelectric material 41, a pressure pin 46 is slidably installed at the front end of the weight block 45, and a spring is provided between the weight block 45 and the pressure pin 46.

[0088] When the current signal transmitter 40 is impacted, the pressure pin 46 of the current signal transmitter 40 transmits pressure to the weight block 45. After that, the pressure pin 46 is reset by the action of the spring, and the weight block 45 is subjected to force to deform the piezoelectric material 41, causing polarization inside the piezoelectric material 41. Correspondingly, an electric charge is generated on the surface of the piezoelectric material 41. Due to surface leakage, the charge is conducted to the electrode plate 42, and then to the lead terminal 43, and finally received by the external control system.

[0089] Piezoelectric materials 41 can be selected from quartz crystals, piezoelectric ceramics, piezoelectric semiconductors, etc.

[0090] The structure and method of providing signals through piezoelectric discharge require no power supply, do not need to be turned on at all times, and are not easily affected by the magnetic field generated during quenching.

[0091] Example 2:

[0092] A contour sensing method, based on the contour sensing device in Embodiment 1 above, includes the following steps:

[0093] When performing induction hardening, the contour induction device is placed inside the inner gear ring 1, so that the induction boss 21 is located in the tooth groove of the inner gear ring 1.

[0094] At the same time, if the main magnetic block 34 in the reaction plate 30 on the sensing boss 21 senses the inner toothed ring 1, the main magnetic block 34, under the attraction of the bottom surface of the tooth groove of the inner toothed ring 1, overcomes the attraction between the auxiliary magnetic block 35 and the metal block 36 in the reaction plate 30, and pulls the main plug 31 and the auxiliary magnetic block 35 to move backward together. The side wing 32 of the main plug 31 seals the drain hole 33. The main plug 31 hits the current signal transmitter 40, triggering the current signal transmitter 40 to send a signal to the external control system, so that the external control system energizes the copper ring 20 and the copper sensing boss 21.

[0095] When the copper ring 20 and the copper induction boss 21 are energized, a magnetic field is generated, and an induced current is generated on the tooth surface of the inner tooth ring 1, which causes induced eddy currents to form in the tooth and tooth groove, heating the tooth and tooth groove surfaces.

[0096] Next, water is introduced into the water inlet 23 of the induction boss 21, so that the water flows into the induction boss 21 from the water inlet 23 and sprays out from the water spray hole 24, spraying onto the inner gear ring 1 for quenching.

[0097] If the contour sensing device is placed inside the inner toothed ring 1, and the main magnetic block 34 is not attracted by the bottom surface of the tooth groove, then part of the water flow entering the water inlet 23 enters the water outlet 33, and the water flow out of the water outlet 33 then enters the telescopic groove to push the embedded rod 221, causing the copper plate 22 to extend close to the bottom surface of the tooth groove, and the copper plate 22 is still in contact with the sensing boss 21.

[0098] The ring edge 341 on the side of the main magnetic block 34 overlaps the side platform of the embedded rod 221. Therefore, when the embedded rod 221 is pushed, it drives the main magnetic block 34 to move backward together until the main magnetic block 34 is attracted by the bottom surface of the tooth groove of the internal gear ring 1, pulling the side wing 32 of the main plug 31 to seal the drain hole 33, and pulling the main plug 31 to hit the current signal transmitter 40, so that the current signal transmitter 40 sends a signal to the external control system, so that the external control system energizes the copper ring 20 and the copper induction boss 21 to achieve induction hardening.

[0099] After induction hardening is completed, the contour induction device disengages from the inner gear ring 1, and the main magnetic block 34 is no longer attracted by the bottom surface of the tooth groove of the inner gear ring 1. At this time, the auxiliary magnetic block 35 is attracted by the metal block 36, which drives the main magnetic block 34 and the main plug 31 to reset.

[0100] If the copper plate 22 moves backward, when the main magnetic block 34 is reset, the ring edge 341 on the side of the main magnetic block 34 will drive the inner rod 221 to pull the copper plate 22 to reset together.

[0101] In this invention, when the contour sensing device is placed inside the inner toothed ring 1, the main magnetic block 34 is attracted by the bottom surface of the tooth groove of the inner toothed ring 1, striking the current signal transmitter 40 to send a signal, energizing the copper ring 20 and the sensing boss 21 to achieve induction hardening. When the main magnetic block 34 is not attracted by the bottom surface of the tooth groove of the inner toothed ring 1, the pressure of the cooling water can be used to push the main magnetic block 34 and the copper plate 22 backward together, which can both reduce the gap between the contour sensing device and the bottom of the tooth groove of the inner toothed ring 1, and also make the main magnetic block 34 attracted by the bottom surface of the tooth groove, triggering the current signal transmitter 40 to send a signal, energizing the copper ring 20 and the sensing boss 21 to achieve effective induction hardening.

[0102] In the existing technology, when the difference in grinding allowance between the bottom of the tooth groove reaches 1mm, the gap between the original contour sensing device and the inner tooth ring 1 can generally only be adjusted within the range of 4mm-5mm.

[0103] In this invention, the adjustment range can be extended by the attraction reaction of the main magnetic block 34 to the bottom surface of the tooth groove. For example, when the gap between the end face of the copper plate 22 at the rear end of the sensing boss 21 and the bottom of the tooth groove of the inner tooth ring is in the range of 4mm-5mm, the main magnetic block 34 is attracted by the bottom surface of the tooth groove. When the gap between the end face of the copper plate 22 and the bottom of the tooth groove of the inner tooth ring is greater than 5mm, the main magnetic block 34 is not attracted by the bottom surface of the tooth groove, and the copper plate 22 is pushed closer to the bottom of the tooth groove by the pressure of the cooling water until it reaches the range of 4mm-5mm. That is to say, the extended adjustable range depends on the distance that the copper plate 22 can be pushed, which can be selected as 3mm (for example). That is, the gap between the contour sensing device and the inner tooth ring 1 can be set in the range of 4mm-8mm. Therefore, the advantage of this invention is that it greatly reduces the difficulty of controlling the gap between the contour sensing device and the inner tooth ring 1.

[0104] It should be noted that the magnetic field strength of the main magnetic block 34 depends on its material, volume and shape. The requirement for the main magnetic block 34 is only within 5 mm (inclusive) of the bottom of the tooth groove of the inner tooth ring 1. At this time, the main magnetic block 34 must overcome the attraction of the auxiliary magnetic block 35 to the metal block 36. The operation to complete this requirement is simple for those skilled in the art and does not require creative labor, so it will not be explained in detail.

[0105] Specifically, in the above steps, when heating the tooth and tooth groove surfaces, the contour induction device moves up and down under the action of the lifting device to complete the induction hardening of the entire internal gear ring 1.

[0106] Specifically, in the above steps, when the current signal transmitter 40 is impacted, the contact pin 46 of the current signal transmitter 40 transmits pressure to the counterweight 45. After that, the contact pin 46 is reset by the action of the spring, and the counterweight 45 is subjected to force to deform the piezoelectric material 41, causing polarization to occur inside the piezoelectric material 41. Correspondingly, an electric charge is generated on the surface of the piezoelectric material 41. Due to surface leakage, the electric charge is conducted to the electrode plate 42, and then to the lead terminal 43, and finally received by the external control system.

[0107] The structure and method of providing signals through piezoelectric discharge require no power supply, do not need to be turned on at all times, and are not easily affected by the magnetic field generated during quenching.

[0108] Although the illustrative specific embodiments of the present invention have been described above to enable those skilled in the art to understand the invention, the invention is not limited to the scope of the specific embodiments. For those skilled in the art, all inventions utilizing the concept of the present invention are protected as long as various variations are within the spirit and scope of the invention as defined and determined by the appended claims.

Claims

1. A contour-following sensing device, characterized in that, It includes a support body and a copper ring located on the outside of the support body, wherein the copper ring is provided with a sensing boss that mates with the tooth groove of the inner tooth ring; The sensing boss has a water spray hole on its side, and an insulating material is provided between the water spray hole and the sensing boss. An insulating block is inserted in the middle of the sensing boss, dividing the copper sensing boss into left and right halves. The insulating block has a water inlet hole, and the water spray hole is connected to the water inlet hole. A copper plate is slidably embedded at the rear end of the sensing boss, and the copper plate contacts the sensing boss that forms the left and right halves. The sensing protrusion is provided with a reaction plate, which is made of insulating material. A main plug is slidably disposed inside the reaction plate. A sliding groove is provided on the side end of the main plug. The side wings of the main plug are embedded in the sliding groove. A drain hole communicating with the water inlet is provided in the sliding groove. The reaction plate has a telescopic groove at its rear end, and the inner rod of the copper plate is slidably and sealingly connected to the telescopic groove, which is in communication with the sliding groove. The main magnetic block is fixed at the rear end of the main plug, and the circumferential edge of the main magnetic block overlaps the side platform of the inner rod; The main plug has a fixed auxiliary magnetic block at its front end, and a metal block is provided in the reaction plate. The metal block is located behind the auxiliary magnetic block, and the auxiliary magnetic block and the metal block are attracted to each other. When the contour sensing device is located within the inner gear ring, the main magnetic block, under the attraction of the tooth groove surface of the inner gear ring, overcomes the attraction between the auxiliary magnetic block and the metal block, and pulls the main plug and the auxiliary magnetic block backward together; The main plug has a hollow structure, and a current signal transmitter fixed to the reaction plate is provided in the hollow structure. The current signal transmitter is connected to an external control system. The impact force generated by the backward sliding of the main plug triggers the current signal transmitter to send a signal to the external control system, so that the external control system energizes the copper ring and the copper sensing boss.

2. The contour sensing device according to claim 1, characterized in that, The supporting body is provided with a lifting connection end at its center. The lifting connection end is connected to a lifting device, which pushes the supporting body to move up and down.

3. The contour sensing device according to claim 1, characterized in that, The supporting body is provided with a water supply port, which is connected to the water inlet hole.

4. The contour sensing device according to claim 1, characterized in that, The rear end of the main magnet extends into the opening of the copper plate and is flush with the rear end face of the copper plate.

5. The contour sensing device according to claim 1, characterized in that, Magnetic plates are installed at the upper and lower ends of the copper ring.

6. The contour sensing device according to claim 5, characterized in that, The upper and lower ends of the sensing boss are equipped with magnetic conductors.

7. The contour sensing device according to claim 1, characterized in that, The current signal transmitter includes a piezoelectric material, with electrode plates disposed between the piezoelectric materials. The current signal transmitter is provided with lead terminals connected to the electrode plates, and the lead terminals are connected to an external control system. An insulating layer is provided around the piezoelectric material, a weight block is placed against the front end of the piezoelectric material, a pressure pin is slidably installed at the front end of the weight block, and a spring is provided between the weight block and the pressure pin.

8. A contour sensing method, characterized in that, The contour sensing method is based on any one of the contour sensing devices described in claims 1-7, and the contour sensing method includes the following steps: When performing induction hardening, the contour induction device is placed inside the inner gear ring, so that the induction boss is located in the tooth groove of the inner gear ring. At the same time, if the main magnetic block in the reaction plate on the sensing boss senses the inner toothed ring, the main magnetic block, under the attraction of the bottom surface of the tooth groove of the inner toothed ring, overcomes the attraction between the auxiliary magnetic block and the metal block in the reaction plate, and pulls the main plug and the auxiliary magnetic block to move backward together. The side wing of the main plug seals the drain hole, and the main plug hits the current signal transmitter, triggering the current signal transmitter to send a signal to the external control system, so that the external control system energizes the copper ring and the copper sensing boss. When the copper ring and the copper induction boss are energized, a magnetic field is generated, and an induced current is generated on the tooth surface of the inner tooth ring, which causes induced eddy currents to form in the teeth and tooth grooves, heating the tooth and tooth groove surfaces. Next, water is introduced into the water inlet of the induction boss, so that the water flows into the induction boss from the water inlet and sprays out from the water spray hole, spraying onto the inner gear ring for quenching. If the contour sensing device is placed inside the inner tooth ring, and the main magnetic block is not attracted by the bottom surface of the tooth groove, then part of the water flow from the inlet hole enters the drain hole, and the water flow from the drain hole then enters the telescopic groove to push the inner rod, causing the copper plate to extend close to the bottom surface of the tooth groove, while the copper plate remains in contact with the sensing boss. The ring edge of the main magnetic block overlaps with the side platform of the inner rod. Therefore, when the inner rod is pushed, it drives the main magnetic block to move backward together until the main magnetic block is attracted by the bottom surface of the tooth groove of the inner tooth ring, pulling the side wing of the main plug to seal the drain hole and pulling the main plug to strike the current signal transmitter, so that the current signal transmitter sends a signal to the external control system, so that the external control system energizes the copper ring and the copper induction boss to achieve induction hardening. After induction hardening is completed, the contour induction device disengages from the inner gear ring, and the main magnetic block is no longer attracted by the bottom surface of the tooth groove of the inner gear ring. At this time, the auxiliary magnetic block is attracted by the metal block, which drives the main magnetic block and the main plug to reset. If the copper plate moves backward, when the main magnetic block resets, the ring edge on the side of the main magnetic block will drive the inner rod to pull the copper plate back to its original position.

9. The contour sensing method according to claim 8, characterized in that, In the above steps, when heating the tooth and tooth groove surfaces, the contour induction device moves up and down under the action of the lifting device to complete the induction hardening of the entire internal gear ring.

10. The contour sensing method according to claim 8, characterized in that, In the above steps, when the current signal transmitter is impacted, the contact pin of the current signal transmitter transmits pressure to the counterweight. After that, the contact pin is reset by the action of the spring, and the counterweight is subjected to force to deform the piezoelectric material, causing polarization inside the piezoelectric material. Correspondingly, an electric charge is generated on the surface of the piezoelectric material. Due to surface leakage, the charge is conducted to the electrode sheet, then to the lead terminal, and finally received by the external control system.

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