Gear ring quenching method and quenching equipment

Abstract

The invention discloses a gear ring quenching method and quenching equipment, and relates to the technical field of gear quenching. Comprising a quenching joint and a fixed clamping seat, a gear ring to be quenched is mounted on the fixed clamping seat; the quenching joint is used for heating a tooth groove of the gear ring through an inductor; the quenching joint comprises an inductor, a busbar and a T-shaped connecting plate, the top of one end of the T-shaped connecting plate is fixedly connected with the output end of a quenching transformer of the quenching induction machine tool; the other end of the T-shaped connecting plate is fixed with the tail end of the busbar; a sensor is preset at the front end of the busbar; wherein one group of busbars and the T-shaped connecting plate are water inlet passages, and the other group of busbars and the T-shaped connecting plate are water outlet passages; the improved quenching method is matched with an internal circulation cooling loop structure of the equipment, so that the cooling effect is improved, the fixing clamping seat structure of the fixing gear ring is optimized, the falling recycling path of the PAG quenching liquid is changed, and the problem that the PAG quenching liquid is polluted due to contact with other components in the recycling process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gear quenching, and in particular to a gear ring quenching method and quenching equipment. Background Art

[0002] The purpose of gear quenching is to transform the supercooled austenite into martensite or bainite to obtain martensite or bainite structure, and then combine it with tempering at different temperatures to significantly improve the strength, hardness, wear resistance, fatigue strength and toughness of the steel, so as to meet the different use requirements of various mechanical parts and tools.

[0003] Our factory currently uses induction hardening machines to harden gear rings. Induction heating involves placing a part inside an inductor. When alternating current of a certain frequency passes through the inductor, an induced current is generated on the part's surface. This current is distributed across the surface in the form of eddy currents, rapidly heating the surface to the hardening temperature. This process is called induction heating: when two adjacent metal conductors carrying high-frequency currents are brought into close proximity, the mutual influence of the magnetic fields causes a redistribution of magnetic lines of force, ultimately leading to a redistribution of current. If the currents in the two conductors are in opposite directions, the current flows from the inside, resulting in the highest current density on the adjacent surfaces. If the currents are in the same direction, the current density is reversed, a phenomenon known as the proximity effect of high-frequency current. Induction hardening machines use the principle of electromagnetic induction to rapidly heat and harden the surface of metal parts. They are widely used in the automotive, machinery, and mold industries.

[0004] A machine tool consists of two main components: 1. The power supply system: This system provides high-frequency or medium-frequency current. High-power SiC high-frequency power supplies, such as Hengjin Induction's, enable rapid heating and precise temperature control. 2. The mechanical structure: This includes the vertical bed and transmission system. These induction hardening machines require specialized quenching joint fixtures for quenching. After the current heats the quenching joint, it aligns with the tooth gap of the gear ring, heating the tooth grooves.

[0005] Traditionally, during the quenching of gear rings using a joint fixture, coolant is required to cool the joint itself and the quenching area. This traditional cooling method involves direct spray cooling. This cooling method not only has limited cooling effectiveness, but also washes dirt from the retaining clamps used to secure the gear rings along the floor trough into the reservoir during the spraying process. This can contaminate or clog the equipment when the coolant is recycled. Furthermore, when the coolant becomes severely contaminated, it must be replaced with new PAG quenching fluid, increasing cooling costs. Therefore, improving the cooling method and optimizing the cooling recovery path are our primary challenges. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a gear ring quenching method and quenching equipment, provides an improved quenching method and cooperates with the internal circulation cooling circuit structure of the equipment to improve the cooling effect, optimizes the fixed clamp seat structure of the fixed gear ring, changes the falling recovery path of the PAG quenching liquid, and avoids the contamination of the PAG quenching liquid caused by contact with other components during the recovery process.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A gear ring quenching device comprises a quenching joint and a fixing clamp; the gear ring to be quenched is mounted on the fixing clamp; the inductor of the quenching joint is connected to the power supply system of the quenching induction machine tool; the quenching joint heats the tooth groove of the gear ring through the inductor; The quenching joint includes: an inductor, a busbar, and a T-shaped connecting plate; the top of one end of the T-shaped connecting plate is fixedly connected to the output terminal of the quenching transformer of the quenching induction machine; the other end of the T-shaped connecting plate is fixed to the end of the busbar; the front end of the busbar is pre-determined to have an inductor; the busbar and T-shaped connecting plate are symmetrically arranged in two groups, one group of the busbar and T-shaped connecting plate serves as a water inlet passage, and the other group of the busbar and T-shaped connecting plate serves as a water outlet passage; the interior of the inductor is provided with a U-shaped channel connecting the water inlet and outlet passages. The water inlet and outlet of the T-shaped connecting plate are connected to the water tank via a first pipeline, and water is supplied by a pump body.

[0008] Preferably, a guide plate is fixed at the bottom of the bus bar; the water inlet of the guide plate is connected to the liquid storage tank through a second pipeline; a spray row is vertically fixed above the liquid outlet of the guide plate, and the spray row sprays PAG quenching liquid toward the tooth groove.

[0009] Preferably, the fixed clamp seat includes: a base, a rotating shaft, an adjusting rail, a sliding seat, a column, a clamping column, a lifting cylinder, a first driving motor, a second driving motor, a rack, and a gear; a rotating shaft is movably provided on the base, and the rotating shaft is driven by the first driving motor; more than 3 adjusting rails are fixed on the side of the rotating shaft in a ring arrangement; a sliding seat is slidably provided on the adjusting rail; a rack is fixed on the top surface of the adjusting rail; a gear is movably provided in the slide seat; the gear is connected to the driving end of the first driving motor; the gear and the rack are meshed and driven by the first driving motor; a column is fixed on the sliding seat; a clamping column is movably inserted on the top of the column; a lifting cylinder is fixed inside the column; the telescopic end of the lifting cylinder is fixedly connected to the bottom of the clamping column, driving the clamping column to rise and fall; a gear ring is placed on the top surface of the column; the outer wall of the gear ring is squeezed and clamped by the clamping column.

[0010] Preferably, a clamping platform is fixed to the inner curved surface of the column, and a liquid retaining circular groove is placed above the clamping platform. A water outlet is formed on one side of the liquid retaining circular groove, and a water outlet cavity is vertically installed at the outlet. The water outlet cavity directly guides the PAG quenching liquid under the tread. A gap base is fixed to the tread below the rotating shaft, and an annular water inlet gap is formed at the edge of the gap base. The water inlet gap is arranged along the annular movement path of the water outlet cavity. The PAG quenching liquid discharged from the water outlet cavity enters the liquid storage tank under the tread through the annular gap.

[0011] Preferably, positioning components are installed on both sides of the sensor; the positioning components include: a fixing plate, a first supporting link, a second supporting link, a positioning plate, and a positioning rod; the top of the fixing plate is fixedly connected to the quenching transformer shell; the first supporting link is fixedly passed through the plate body of the fixing plate in a transverse direction; positioning plates are respectively fixed at both ends of the first supporting link; the second supporting link is fixed between the positioning plates; and the positioning rod is fixed on the front of the positioning plate.

[0012] Preferably, a fence is provided between the platform and the legs of the quenching induction machine, and the fence protects and covers the movable range of the quenching induction machine.

[0013] Preferably, the quenching joints are symmetrically provided in two groups, and each of the quenching joints is correspondingly connected to the output end of the quenching transformer of a group of quenching induction machine tools.

[0014] A gear ring quenching method is performed using one of the gear ring quenching devices described above, and the steps are as follows: S1. Install the quenching joint; connect the T-shaped connecting plate of the quenching joint to the output end of the quenching transformer of the quenching induction machine tool, and connect the inductor of the quenching joint to the busbar to form an integral part with a fixed length and height; S2, control the quenching joint index parameters; input the length data X1 and height data Y1 of the whole piece into the control system of the quenching induction machine tool; S3. Install and adjust the gear ring position; hoist the gear ring to the top of the base using the overhead crane hoist, and control the position of the slide by controlling the first drive motor so that the gear ring is in the center of the processing position; S4. Start the quenching induction machine to start processing; turn on the power of the quenching induction machine, and the inductor starts the quenching operation. At the same time, the cooling water internal circulation path of the quenching joint is connected, and the PAG quenching liquid external spray path is started.

[0015] Preferably, the sensor length is 250 mm, the sensor height is 35 mm; the spray temperature range is 37° C.-46° C.; and the spray volume is 29-35 L / min.

[0016] The beneficial effects of the present invention are as follows: 1. The quenching device cools down the material by two cooling methods: circulation inside the quenching joint and spraying outside the spray row. It not only cools the sensor, but also cools the quenching position of the tooth groove, thereby improving the cooling effect.

[0017] 2. The positioning component plays a guiding role during the quenching process, reduces interference, and improves the accuracy of the sensor during lifting and lowering.

[0018] 3. While the fixed clamp seat fixes the gear ring, the PAG quenching liquid after spraying can be collected to prevent the PAG quenching liquid from directly contaminating the adjustment rail and other components on the fixed clamp seat, and directly enter the recycling area; the PAG quenching liquid sprayed externally is collected in the liquid storage tank after spraying, so as to facilitate the subsequent secondary treatment and utilization of the quenching liquid and reduce resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall connection relationship of the present invention.

[0021] Figure 2 It is a schematic diagram of the gear ring matching relationship of the present invention.

[0022] Figure 3 It is a schematic diagram of the matching relationship of the liquid retaining circular groove of the present invention.

[0023] Figure 4 It is a schematic diagram of the connection relationship of the bottom of the platform of the present invention.

[0024] Figure 5 It is a cross-sectional schematic diagram of the connection relationship of the adjustment rail of the present invention.

[0025] Figure 6 It is a schematic diagram of the matching state of the quenching joint of the present invention.

[0026] Figure 7 It is a schematic diagram of the connection relationship of the quenching joint of the present invention.

[0027] Figure 8 Schematic diagram of the disassembly relationship of the flow direction of the quenching joint of the present invention In the figure, quenching joint 1, sensor 1.1, bus bar 1.2, T-type connecting plate 1.3, guide plate 1.4, spray bar 1.5, spray plate 1.6, fixed clamp seat 2, base 2.1, adjustment rail 2.2, slide 2.3, column 2.4, clamping column 2.5, lifting cylinder 2.6, first drive motor 2.7, second drive motor 2.8, rack 2.9, clamping table 2.10, liquid retaining groove 2.11, outlet Water chamber 2.12, rotating shaft 2.13, gear 2.14, quenching induction machine 3, quenching transformer 3.1, first pipeline 4, second pipeline 5, gear ring 6, tooth groove 6.1, platform 7, gap bottom plate 8, water inlet gap 8.1, liquid storage tank 9, positioning assembly 10, fixing plate 10.1, first supporting link 10.2, second supporting link 10.3, positioning plate 10.4, positioning rod 10.5, enclosure 11. DETAILED DESCRIPTION

[0028] like Figure 1 、 2 As shown in Figure 6, a gear ring quenching device includes two major parts: a quenching joint 1 and a fixed clamp 2. The fixed clamp 2 is mounted with the gear ring 6 to be quenched. The inductor 1.1 of the quenching joint 1 is connected to the power supply system of the quenching induction machine 3. The quenching joint 1 heats the tooth groove 6.1 of the gear ring 6 via the inductor 1.1. The quenching joint 1 is installed and used based on an existing quenching induction machine 3, which is an EMA PS2HS-3000 model. Two groups of quenching joints 1 are symmetrically provided, each of which is connected to the output end of the quenching transformer 3.1 of one group of quenching induction machines 3. The quenching joints 1 can be raised, lowered, and moved laterally along with the quenching induction machine 3.

[0029] The main improvements are: the quenching joint 1 and the fixed clamp 2, and the quenching induction machine 3 is not described in detail. Among them, the quenching joint 1 includes: an inductor 1.1, a bus 1.2, and a T-shaped connecting plate 1.3; the top of one end of the T-shaped connecting plate 1.3 is fixedly connected to the output end of the quenching transformer 3.1 of the quenching induction machine for power supply; the other end of the T-shaped connecting plate 1.3 is fixed to the end of the bus 1.2; the front end of the bus 1.2 is fixed with the inductor 1.1; the bus 1.2 and the T-shaped connecting plate 1.3 are symmetrically arranged in two groups, one of which is provided with a water inlet passage for liquid inflow, and the other group of the bus 1.2 and the T-shaped connecting plate 1.3 is provided with a water outlet passage for liquid outflow; the interior of the inductor 1.1 is provided with a U-shaped channel connecting the water inlet passage and the water outlet passage, and the cooling water is cooled when passing through the inductor 1.1. The water inlet and outlet of the T-shaped connecting plate 1.3 are connected to the water tank through the first pipeline 4, and water is supplied by the pump body to form a circulation loop as a whole. Distilled water is used as cooling water, and the cooling method of this part of the sensor 1.1 is an internal circulation path. A positioning assembly 10 is provided on both sides of the sensor 1.1; the positioning assembly 10 includes: a fixed plate 10.1, a first support link 10.2, a second support link 10.3, a positioning plate 10.4, and a positioning rod 10.5; the top of the fixed plate 10.1 is fixedly connected to the shell of the quenching transformer 3.1; the first support link 10.2 is fixedly passed through the plate body of the fixed plate 10.1 horizontally; the two ends of the first support link 10.2 are respectively fixed with positioning plates 10.4; the second support link 10.3 is fixed between the positioning plates 10.4; the front of the positioning plate 10.4 is fixed with a positioning rod 10.5, and the positioning rods 10.5 are located on both sides of the sensor 1.1, and cooperate with the teeth and grooves on both sides of the sensor 1.1 to ensure the stability of the sensor 1.1.

[0030] like Figure 1-5As shown, the fixed clamp base 2 includes: a base 2.1, a rotating shaft 2.13, an adjustment rail 2.2, a slide 2.3, a column 2.4, a clamping column 2.5, a lifting cylinder 2.5, a first drive motor 2.7, a second drive motor 2.8, a rack 2.9, and a gear 2.14; a rotating shaft 2.13 is movably provided on the base 2.1, and the rotating shaft 2.13 is driven by the first drive motor 2.7; six adjustment rails 2.2 are fixed in a circular arrangement on the side of the rotating shaft 2.13; a slide 2.3 is slidably provided on the adjustment rail 2.2; a rack 2.9 is fixed to the top surface of the adjustment rail 2.2; the slide 2.3 A gear 2.14 is movably provided inside; the gear 2.14 is connected to the driving end of the second drive motor 2.8; the gear 2.14 meshes with the rack 2.9 and is driven by the second drive motor 2.8; hollow columns 2.4 are fixed on three groups of non-adjacent slides 2.3; a clamping column 2.5 is movably inserted into the top of the column 2.4; a lifting cylinder 2.5 is fixed inside the column 2.4; the telescopic end of the lifting cylinder 2.5 is fixedly connected to the bottom of the clamping column 2.5, driving the clamping column 2.5 to rise and fall; a gear ring 6 is placed on the top surface of the column 2.4; the outer wall of the gear ring 6 is squeezed and clamped by the clamping column 2.5.

[0031] like Figure 2 、 6 As shown in Figures 7 and 8, the quenching joint 1 is also provided with an external spraying part. A guide plate 1.4 with a coolant channel on its inner wall is fixed at the bottom of the bus 1.2; the water inlet of the guide plate 1.4 is connected to the liquid storage tank through the second pipeline 5; the second pipeline 5 also provides spraying power through the pump body. The liquid storage tank and the water storage tank are both liquid container tanks. The difference is that the liquid storage tank is used to store PAG quenching liquid, while the water storage tank is used to store cooling water, i.e. distilled water. There is no specific improvement in this part and it will not be repeated. A spray row 1.5 connected to its liquid outlet is vertically fixed on the guide plate 1.4. The liquid outlet of the spray row 1.5 sprays the PAG quenching liquid in the direction of the tooth groove 6.1. The spray row 1.5 is symmetrically arranged on both sides of the sensor 1.1. A spray plate 1.6 is also provided in the middle of the front end of the guide plate 1.4, and the spray plate 1.6 is also connected to the guide plate 1.4. The external spraying part cools the outer side of the inductor 1.1 and the tooth groove 6.1.

[0032] like Figure 2-4As shown, in order to avoid waste caused by the sprayed PAG quenching oil, corresponding improvements have been made on the fixed clamp seat 2. Furthermore, a clamping table 2.10 is fixed on the outer arc surface of the column 2.4 facing the rotating shaft 2.13, and a liquid blocking circular groove 2.11 is set between each clamping table 2.10. A water outlet is provided on one side of the liquid blocking circular groove 2.11, and a water outlet chamber 2.12 is vertically installed at the water outlet. The water outlet chamber 2.12 directly guides the PAG quenching liquid to the bottom of the tread 7; a gap bottom plate 8 is fixed on the tread 7 below the base 2.1, and an annular water inlet gap 8.1 is provided on the edge of the gap bottom plate 8. The water inlet gap 8.1 is arranged along the annular moving path of the water outlet chamber 2.12, and the PAG quenching liquid discharged from the water outlet chamber 2.12 enters the liquid storage tank 9 below the tread 7 from the annular gap. The collection of PAG quenching liquid also limits the recycling path of the PAG quenching liquid, reducing contamination caused by contamination of other components during PAG recycling and making subsequent recycling and reuse easier. A barrier 11 is provided between the platform 7 and the legs of the quenching induction machine 3. The barrier 11 protects and covers the range of motion of the quenching induction machine 3. When the quenching induction machine 3 is in operation, operators are prohibited from entering the barrier 11.

[0033] A method for quenching a gear ring 6 is performed using one of the gear ring 6 quenching devices described above, and the steps are as follows: Step 1, install the quenching joint 1; connect the T-shaped connecting plate 1.3 of the quenching joint 1 to the output end of the quenching transformer 3.1 of the quenching induction machine 3, and the inductor 1.1 of the quenching joint 1 is connected to the bus 1.2 to form an integral part with a fixed length and height.

[0034] Step 2: Control the index parameters of the quenching joint 1; input the length data of the whole part 250mm, the height data 35mm, the minimum coolant spray temperature 37°C and the maximum coolant spray temperature 46°C into the control system of the quenching induction machine 3.

[0035] Step 3, install and adjust the position of the gear ring 6; lift the gear ring 6 to the top of the base 2.1 by the overhead crane hoist, and control the position of the slide 2.3 by controlling the second drive motor 2.8 so that the gear ring 6 is in the center of the processing position.

[0036] Step 4, start the quenching induction machine 3 to start processing; turn on the power of the quenching induction machine 3, and the inductor 1.1 starts the quenching operation. At the same time, the cooling water internal circulation passage of the quenching joint 1 is connected, and the PAG quenching liquid external spray passage is started. The spray volume can be controlled in the range of 29-35L / min to ensure the cooling effect.

[0037] Unless otherwise specified in the above description, the fixing methods are generally welded or screwed using common technical means known to those skilled in the art. The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gear ring quenching device, comprising a quenching induction machine tool, characterized in that: It also includes a quenching joint and a fixing clamp seat; the fixing clamp seat is mounted with a gear ring to be quenched; the inductor of the quenching joint is connected to the power supply system of the quenching induction machine tool; the quenching joint heats the tooth groove of the gear ring through the inductor; The quenching joint includes: an inductor, a busbar, and a T-shaped connecting plate; the top of one end of the T-shaped connecting plate is fixedly connected to the output terminal of the quenching transformer of the quenching induction machine; the other end of the T-shaped connecting plate is fixed to the end of the busbar; the front end of the busbar is pre-determined to have an inductor; the busbar and T-shaped connecting plate are symmetrically arranged in two groups, one group of the busbar and T-shaped connecting plate serves as a water inlet passage, and the other group of the busbar and T-shaped connecting plate serves as a water outlet passage; the interior of the inductor is provided with a U-shaped channel connecting the water inlet and outlet passages. The water inlet and outlet of the T-shaped connecting plate are connected to the water tank via a first pipeline, and water is supplied by a pump body.

2. The gear ring quenching equipment according to claim 1, characterized in that: A guide plate is fixed at the bottom of the busbar; the water inlet of the guide plate is connected to the liquid storage tank through a second pipeline; a spray row is vertically fixed above the liquid outlet of the guide plate, and the spray row sprays PAG quenching liquid toward the tooth groove.

3. The gear ring quenching equipment according to claim 1, characterized in that: The fixed clamp seat includes: a base, a rotating shaft, an adjusting rail, a sliding seat, a column, a clamping column, a lifting cylinder, a first driving motor, a second driving motor, a rack, and a gear; a rotating shaft is movably provided on the base, and the rotating shaft is driven by the first driving motor; more than 3 adjusting rails are fixed on the side of the rotating shaft in a ring arrangement; a sliding seat is slidably provided on the adjusting rail; a rack is fixed on the top surface of the adjusting rail; a gear is movably provided inside the sliding seat; the gear is connected to the driving end of the first driving motor; the gear and the rack are engaged and driven by the first driving motor; a column is fixed on the sliding seat; a clamping column is movably inserted on the top of the column; a lifting cylinder is fixed inside the column; the telescopic end of the lifting cylinder is fixedly connected to the bottom of the clamping column, driving the clamping column to rise and fall; a gear ring is placed on the top surface of the column; the outer wall of the gear ring is squeezed and clamped by the clamping column.

4. The gear ring quenching equipment according to claim 1, characterized in that: A clamping platform is fixed to the inner curved surface of the column, and a liquid retaining groove is placed above the clamping platform. A water outlet is provided on one side of the liquid retaining groove, and a water outlet chamber is installed vertically at the outlet. The water outlet chamber directly directs the PAG quenching liquid to the bottom of the tread. A gap base is fixed to the tread below the rotating shaft, and an annular water inlet gap is defined at the edge of the gap base. The water inlet gap is arranged along the circular movement path of the water outlet chamber. The PAG quenching liquid discharged from the water outlet chamber enters the liquid storage tank below the tread through the annular gap.

5. The gear ring quenching equipment according to claim 1, characterized in that: Positioning components are installed on both sides of the sensor; the positioning components include: a fixing plate, a first supporting link, a second supporting link, a positioning plate, and a positioning rod; the top of the fixing plate is fixedly connected to the quenching transformer shell; the first supporting link is fixedly passed through the plate body of the fixing plate in a transverse direction; positioning plates are fixed at both ends of the first supporting link respectively; the second supporting link is fixed between the positioning plates; and the positioning rod is fixed on the front of the positioning plate.

6. The gear ring quenching equipment according to claim 1, characterized in that: A fence is provided between the step and the legs of the quenching induction machine tool, and the fence protects and covers the movable range of the quenching induction machine tool.

7. The gear ring quenching equipment according to claim 1, characterized in that: The quenching joints are symmetrically provided in two groups, and each of the quenching joints is correspondingly connected to the output end of the quenching transformer of a group of quenching induction machine tools.

8. A gear ring quenching method, using one of the gear ring quenching equipment described above, comprising the following steps: S1. Install the quenching joint; connect the T-shaped connecting plate of the quenching joint to the output end of the quenching transformer of the quenching induction machine tool, and the inductor of the quenching joint is connected to the bus to form an integral part with a fixed length and height. S2, control quenching joint index parameters; the overall length data X1 and height data Y1 input to the quenching induction machine control system; S3. Install and adjust the gear ring position; hoist the gear ring to the top of the base using the overhead crane hoist, and control the position of the slide by controlling the first drive motor so that the gear ring is in the center of the processing position; S4. Start the quenching induction machine to start processing; turn on the power of the quenching induction machine, and the inductor starts the quenching operation. At the same time, the cooling water internal circulation path of the quenching joint is connected, and the PAG quenching liquid external spray path is started.

9. The gear ring quenching method according to claim 8, characterized in that: The sensor length is 250 mm, the sensor height is 35 mm; the spray temperature range is 37° C.-46° C.; and the spray volume is 29-35 L / min.

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