A die plate mold surface nitriding apparatus

Abstract

The utility model provides a kind of tooth plate mould surface nitriding equipment, it is related to surface material modification technical field, the tooth plate mould surface nitriding equipment includes base, heating part, heating part is set on base, heating part is used to heat tooth plate mould, gas supply part, gas supply part is used to provide gas for tooth plate mould surface nitriding in heating part, discharging part, discharging part is used to place tooth plate mould, and can drive tooth plate mould rotation, discharging part can drive tooth plate mould to enter into heating part, this kind of nitriding equipment when using, can change the position of discharging plate on heat insulation wall by controlling the rotation of heat insulation wall, make discharging plate be in the environment outside nitriding equipment, so that staff can conveniently place tooth plate mould on discharging plate, also convenient to quickly take away tooth plate mould after cooling from discharging plate, the convenience of placement and transfer of tooth plate mould is greatly improved, and use effect is good.

Description

Technical Field

[0001] This utility model relates to the field of surface material modification technology, specifically a nitriding device for the surface of a toothed mold. Background Technology

[0002] Nitriding the surface of the die plate mold can increase its hardness and thus its service life. However, nitriding equipment is required for the nitriding process. Existing nitriding equipment requires manual or hoisting methods to place the die plate mold inside. Furthermore, the relatively small internal space of the nitriding equipment makes it inconvenient to place and remove the die plate mold, which is difficult to meet the usage requirements. Utility Model Content

[0003] The purpose of this invention is to provide a nitriding device for the surface of a toothed mold, which aims to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the nitriding equipment for the surface of the toothed mold includes:

[0005] Base;

[0006] A heating element is disposed on a base and is used to heat the tooth plate mold.

[0007] A gas supply unit, which is used to supply gas to the heating unit for nitriding the surface of the tooth plate mold;

[0008] The feeding section is used to place the toothed plate mold and can drive the toothed plate mold to rotate. The feeding section can drive the toothed plate mold into the heating section.

[0009] Preferably, the heating part includes a heating cavity disposed on the base, a plurality of material feeding slots are arranged on the side of the heating cavity, and a heating module is disposed inside the heating cavity and above the material feeding slots.

[0010] Preferably, the gas supply unit includes two connection ports disposed on the heating chamber, and the two connection ports are respectively connected to an external gas source, one of which is an ammonia gas source and the other is a carbon dioxide gas source. The heating chamber is provided with two dispersion tubes, and the two dispersion tubes are respectively connected to one of the connection ports. The dispersion tubes are provided with gas outlet holes.

[0011] Preferably, the feeding section includes a movable plate, and two fixed rods are provided on the base. The movable plate is slidably connected to the fixed rods. A heat insulation wall is provided on the movable plate, and a plurality of feeding plates are arrayed on the side of the heat insulation wall. The positions of the feeding plates on the heat insulation wall correspond one-to-one with the positions of the feeding slots on the heating chamber. A reinforcing plate is provided at the bottom of the heat insulation wall, and a column penetrating the movable plate and rotatably connected to the movable plate is provided at the lower end of the heat insulation wall. A gear is provided at the lower end of the column, and a guide rail is provided on the lower surface of the movable plate. The sliding connection includes a slider with teeth that mesh with gears. A base plate is mounted on the guide rail, and a fixed plate is mounted on the slider. The system also includes a linear actuator, with its bottom end fixedly connected to the base plate and its other end fixedly connected to the fixed plate. A cover is mounted on the lower surface of the movable plate, and two vertical plates are mounted on the lower surface of the base. A lead screw is positioned between the two vertical plates. A motor for starting the lead screw is mounted on the base, and a slide block threadedly connected to the lead screw is mounted on the cover.

[0012] Preferably, the upper surface of the feeding plate is uniformly provided with protrusions, wherein the height of the protrusions on both sides of the feeding plate is higher than the height of the protrusion in the middle of the feeding plate.

[0013] The beneficial effects of this utility model are:

[0014] When using this type of nitriding equipment, the position of the feeding plate on the heat insulation wall can be changed by controlling the rotation of the heat insulation wall, so that the feeding plate is in the environment outside the nitriding equipment. This allows the operator to easily place the toothed plate mold on the feeding plate and also facilitates the quick removal of the cooled toothed plate mold from the feeding plate. The convenience of placing and transferring the toothed plate mold is greatly improved, resulting in good performance. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the toothed plate mold being placed on the feeding plate.

[0017] Figure 3 This is a schematic diagram of the tooth plate mold after it has rotated 180° with the heat insulation wall.

[0018] Figure 4 This is a schematic diagram of the feeding plate entering the heating chamber.

[0019] Figure 5 This is a side view of a specific embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the internal structure of the heating chamber.

[0021] Figure 7 This is a bottom view of a specific embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the teeth and gears meshing on the slider.

[0023] Figure 9 This is a schematic diagram of the slider and guide rail.

[0024] Figure 10 This is a schematic diagram of the raised structure on the feeding plate.

[0025] In the diagram: 1. Base; 2. Heating chamber; 3. Feeding trough; 4. Heating module; 5. Connection port; 6. Dispersion tube; 7. Air outlet; 8. Movable plate; 9. Fixing rod; 10. Insulation wall; 11. Feeding plate; 12. Reinforcing plate; 13. Column; 14. Gear; 15. Guide rail; 16. Slider; 17. Base plate; 18. Fixing plate; 19. Linear actuator; 20. Cover; 21. Vertical plate; 22. Lead screw; 23. Motor; 24. Slide seat; 25. Protrusion; 26. Locking fastener; 27. Tooth plate mold. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0027] like Figure 1-10 As shown, a nitriding device for the surface of a toothed mold includes:

[0028] Base 1;

[0029] A heating element is provided on the base 1 and is used to heat the toothed plate mold 27.

[0030] The gas supply unit is used to supply gas to the heating unit for nitriding the surface of the toothed mold 27.

[0031] The feeding section is used to place the tooth plate mold 27 and can drive the tooth plate mold 27 to rotate. The feeding section can drive the tooth plate mold 27 into the heating section.

[0032] Furthermore, the heating unit includes a heating chamber 2 disposed on the base 1, a plurality of material discharge slots 3 are arranged on the side of the heating chamber 2, and a heating module 4 is disposed inside the heating chamber 2 and above the material discharge slots 3.

[0033] The heating chamber 2 is made of metal plate and refractory material. The refractory material is located inside the heating chamber 2. The heating module 4 can be heated by electric heating wire or by radiant tube, and includes a temperature control system, including thermocouple temperature detection, PID controller temperature regulation, solid-state relay power execution and fan circulation. The temperature rises at a rate of 5-10℃ / min to the predetermined temperature.

[0034] Furthermore, the gas supply unit includes two connection ports 5 provided on the heating chamber 2. The two connection ports 5 are respectively connected to external gas sources, one of which is an ammonia gas source and the other is a carbon dioxide gas source. The heating chamber 2 is provided with two dispersion tubes 6, which are respectively connected to one of the connection ports 5. The dispersion tubes 6 are provided with gas outlet holes 7.

[0035] The dispersion tube 6 and the vent 7 can be made of heat-resistant materials, or fire-resistant protective materials can be applied to their surfaces to protect the dispersion tube 6 and the vent 7.

[0036] The ammonia gas source is an ammonia cylinder, and the carbon dioxide gas source is a carbon dioxide cylinder. Mass flow meters and proportional valves are installed between the ammonia cylinder and connection port 5, and between the carbon dioxide cylinder and another connection port 5, to regulate the flow rate of ammonia and carbon dioxide into the heating chamber 2. The proportion of carbon dioxide is added at approximately 5%-10% of the ammonia flow rate. When supplying ammonia and carbon dioxide into the heating chamber 2, the gas supply system can be controlled by a PLC.

[0037] It is also equipped with a nitrogen potential (KN) sensor to monitor the nitrogen potential inside the furnace and adjust the NH3 flow rate accordingly.

[0038] Furthermore, the feeding section includes a movable plate 8, and two fixed rods 9 are provided on the base 1. The movable plate 8 is slidably connected to the fixed rods 9. A heat insulation wall 10 is provided on the movable plate 8, and several feeding plates 11 are arrayed on the side of the heat insulation wall 10. The positions of the feeding plates 11 on the heat insulation wall 10 correspond one-to-one with the positions of the feeding grooves 3 on the heating chamber 2. A reinforcing plate 12 is provided at the bottom of the heat insulation wall 10. A column 13 is provided at the lower end of the heat insulation wall 10, penetrating the movable plate 8 and rotatably connected to the movable plate 8. A gear 14 is provided at the lower end of the column 13. A guide rail 15 is provided on the lower surface of the movable plate 8, and a sliding connection is provided on the guide rail 15. The system includes a slider 16 with teeth that mesh with gear 14, a base plate 17 on a guide rail 15, a fixed plate 18 on the slider 16, and a linear actuator 19. The bottom end of the linear actuator 19 is fixedly connected to the base plate 17, and the other end of the linear actuator 19 is fixedly connected to the fixed plate 18. A cover 20 is provided on the lower surface of the movable plate 8, and two vertical plates 21 are provided on the lower surface of the base 1. A lead screw 22 is provided between the two vertical plates 21. A motor 23 for starting the lead screw 22 is provided on the base 1, and a slide block 24 threadedly connected to the lead screw 22 is provided on the cover 20.

[0039] The heat insulation wall 10 is made of metal plates, refractory materials, and metal square tubes. The refractory material is located on the inner side of the heat insulation wall 10. The discharge plate 11 is made of high-temperature resistant metal, and the reinforcing plate 12 is a metal plate used to improve the stability of the heat insulation wall 10 in an upright state. The linear actuator 19 is an electric push rod or a hydraulically driven hydraulic rod. The use of the hydraulic rod requires a power source. By controlling the contraction of the output end of the linear actuator 19, the fixed plate 18 can be moved towards the base plate 17, and the fixed plate 18 simultaneously drives the two sliders 16 to move. The sliders 16 are in... During movement, the teeth on one of the sliders 16 mesh with the gear 14, causing the gear 14 to rotate. The output of the linear actuator 19 stops at only two positions. When the output of the linear actuator 19 moves from one position to another, it drives the gear 14 to rotate 180°, thereby causing the upper reinforcing plate 12 and the heat insulation wall 10 to rotate 180°. The rotation error is less than ±1°. The linear actuator 19 is controlled by a PLC controller and equipped with a position sensor, so that the output of the linear actuator 19 can move stably between these two positions.

[0040] When the heat insulation wall 10 is brought closer to the heating chamber 2, the motor 23 is started. The output end of the motor 23 rotates clockwise, driving the lead screw 22 to rotate. Through the threaded connection between the lead screw 22 and the slide 24, and the sliding connection between the upper movable plate 8 and the fixed rod 9, the heat insulation wall 10 can be moved towards the heating chamber 2. When the heat insulation wall 10 is moved away from the heating chamber 2, the motor 23 is started. The output end of the motor 23 rotates counterclockwise, driving the lead screw 22 to rotate. Through the threaded connection between the lead screw 22 and the slide 24, the heat insulation wall 10 is moved away from the heating chamber 2. The motor 23 is controlled by the PLC.

[0041] Lubricating grease can be applied to the surface of the lead screw 22 periodically to ensure smooth engagement between the lead screw 22 and the slide 24.

[0042] The heat insulation wall 10 and the heating chamber 2 can be connected together by a locking fastener 26, which is located on the upper side of both sides of the heating chamber 2.

[0043] Furthermore, the upper surface of the feeding plate 11 is uniformly provided with protrusions 25, wherein the height of the protrusions 25 on both sides of the feeding plate 11 is higher than the height of the protrusion 25 in the middle of the feeding plate 11. The protrusions 25 are made of high-temperature resistant metal or non-metal material. The protrusions 25 can maintain a certain gap between the lower surface of the toothed die 27 and the lower surface of the feeding plate 11, which is convenient for placing the toothed die 27 on the feeding plate 11 and for removing the toothed die 27 from the feeding plate 11. It also facilitates the entry of ammonia and carbon dioxide gas into the lower part of the toothed die 27, which can better achieve nitriding of the surface of the toothed die 27. Since only the tooth surface of the toothed die 27 needs to be nitrided, and the nitriding of the other surfaces is not the focus, it is not necessary to flip the toothed die 27 over for secondary nitriding.

[0044] The nitriding process on the surface of the toothed mold 27 includes the following steps:

[0045] a. Clean the Cr12MoV toothed plate mold 27 to remove oil stains, dry it, and then place it on the feeding plate 11;

[0046] b. After the tooth plate mold 27 is placed, the heat insulation wall 10 is rotated 180° by the linear actuator 19, so that the tooth plate mold 27 changes from the side away from the heating chamber 2 to the side facing the heating chamber 2.

[0047] c. Start motor 23 to move heat insulation wall 10 so that heat insulation wall 10 abuts against heating chamber 2. At the same time, material discharge plate 11 and toothed plate mold 27 enter the interior of heating chamber 2 through material discharge groove 3.

[0048] d. Set the heating temperature to 550℃, the heating time to 3 hours, and the ammonia flow rate to 0.8 m³ / h. 3 The carbon dioxide flow rate is 0.08 m³ / h.3 / h, control the furnace pressure to 100pa to prevent air from entering;

[0049] e. After completing the above processing, wait for the furnace temperature to cool to 180°C, then turn off the input of ammonia and carbon dioxide, and wait for it to cool down.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A nitriding device for the surface of a toothed die mold, characterized in that, include: Base; A heating element is disposed on a base and is used to heat the tooth plate mold. A gas supply unit, which is used to supply gas to the heating unit for nitriding the surface of the tooth plate mold; The feeding section is used to place the toothed plate mold and can drive the toothed plate mold to rotate. The feeding section can drive the toothed plate mold into the heating section.

2. The nitriding equipment for the surface of the toothed mold according to claim 1, characterized in that, The heating unit includes a heating cavity disposed on the base, and a plurality of feeding slots are arranged on the side of the heating cavity. A heating module is disposed inside the heating cavity and above the feeding slots.

3. The nitriding equipment for the surface of the toothed mold according to claim 2, characterized in that, The gas supply unit includes two connection ports on the heating chamber. The two connection ports are respectively connected to an external gas source, one of which is an ammonia gas source and the other is a carbon dioxide gas source. The heating chamber is provided with two dispersion tubes, each of which is connected to one of the connection ports. The dispersion tubes are provided with gas outlet holes.

4. The nitriding equipment for the surface of the toothed mold according to claim 1, characterized in that, The feeding section includes a movable plate, two fixed rods on the base, the movable plate and the fixed rods being slidably connected, a heat insulation wall on the movable plate, and several feeding plates arrayed on the side of the heat insulation wall. The positions of the feeding plates on the heat insulation wall correspond one-to-one with the positions of the feeding slots on the heating chamber. A reinforcing plate is provided at the bottom of the heat insulation wall, and a column penetrating the movable plate and rotatably connected to the lower end of the heat insulation wall is provided, with a gear at the lower end of the column. A guide rail is provided on the lower surface of the movable plate, and a slider is slidably connected to the guide rail. The slider has teeth that mesh with the gear. A base plate is provided on the guide rail, and a fixed plate is provided on the slider. The section also includes a linear actuator, the bottom end of which is fixedly connected to the base plate, and the other end of which is fixedly connected to the fixed plate. A cover is provided on the lower surface of the movable plate, two vertical plates are provided on the lower surface of the base, and a lead screw is provided between the two vertical plates. A motor for starting the lead screw rotation is provided on the base, and a slide block threadedly connected to the lead screw is provided on the cover.

5. The nitriding equipment for the surface of the toothed mold according to claim 4, characterized in that, The upper surface of the feeding plate is uniformly provided with protrusions, wherein the height of the protrusions on both sides of the feeding plate is higher than the height of the protrusion in the middle of the feeding plate.

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