Tungsten steel hard alloy cutter cutting edge strengthening and toughening treatment device

Abstract

The utility model relates to the technical field of cutter cutting edge strengthening treatment, and particularly discloses a tungsten steel hard alloy cutter cutting edge strengthening and toughening treatment device, the top of a nitriding furnace body is provided with a double-layer cylinder body, the double-layer cylinder body comprises an outer cylinder and an inner cylinder, and the inner diameter of the inner cylinder is consistent with the inner diameter of a feeding channel; a plurality of exhaust holes are formed in the circumferential face of the bottom end of the inner cylinder in a surrounding mode, the outer cylinder is communicated with the collecting tank through a pipeline, a sealing cover is in threaded connection with the inner circle top of the inner cylinder, and a cage structure is fixedly connected to the bottom end of the lifting rod. According to the technical scheme, when the tungsten steel alloy cutter is strengthened, the sealing ring is in contact with the inner circle of the inner cylinder in an attached mode, after strengthening is completed, salt liquid on the surface of the lower cover is thrown away by rotating the lifting rod, the cage body structure is lifted, the sealing ring of the lower cover is in contact with the feeding channel in an attached mode, and gas entering the inner cylinder is sucked into the collecting tank through a pipeline to be temporarily stored; the structure is simple, the sealing performance is high, the gas leakage protection grade of the nitriding furnace body is greatly improved, and the operation safety is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of tool edge strengthening treatment, in particular to a tungsten steel carbide tool edge strengthening and toughening treatment device. Background Art

[0002] QPQ technology, short for salt-bath nitriding of metal surfaces, is an oxynitriding process that includes preheating, nitriding, oxidation, and polishing. QPQ technology can significantly improve the hardness of cutting edges, thereby enhancing the wear resistance of cutting tools. A search of the publication number (CN221522748U) discloses a device for toughening the cutting edges of tungsten carbide cutting tools. The device comprises a nitriding furnace body, a furnace cover, an alloy cutting tool, and a lifter that drives the furnace cover up and down. A drive motor is mounted on the top of the furnace cover.

[0003] In the process of realizing the present utility model, the inventors found that there are at least the following problems in the prior art that have not been solved: the above-mentioned cutting edge toughening treatment device can reduce the loss caused by the salt liquid being carried out, but when taking out the strengthened tungsten steel carbide tool, since the nitriding furnace body is only blocked by the opening and closing partition, the exhaust gas of the nitriding furnace body is easy to leak. When taking out the strengthened tungsten steel carbide tool, it is easy to come into contact with the high concentration of nitriding furnace body exhaust gas, which poses a safety hazard. The sealing method and cage structure need to be improved. Therefore, we propose a cutting edge toughening treatment device for tungsten steel carbide tool. Utility Model Content

[0004] The purpose of the utility model is to provide a tungsten steel carbide tool edge strengthening and toughening treatment device, which solves the problems raised in the background technology.

[0005] To achieve the above-mentioned object, the utility model provides the following technical solutions: a tungsten steel carbide cutting tool edge toughening treatment device, comprising a nitriding furnace body, a feed channel is provided on the top of the nitriding furnace body, a cage is fixedly provided below the feed channel, a double-layer cylinder is fixedly provided on the top of the nitriding furnace body by bolts, the double-layer cylinder comprises an outer cylinder and an inner cylinder arranged concentrically, the inner diameter of the inner cylinder is consistent with the inner diameter of the feed channel, a plurality of exhaust holes are provided around the circumference of the bottom end of the inner cylinder, and the outer cylinder is connected to a collection tank through a pipe;

[0006] A sealing cover is threadedly connected to the top of the inner circle of the inner cylinder, a lifting rod is provided through the middle of the sealing cover, and the bottom end of the lifting rod is fixedly connected to a cage structure. The cage structure includes an upper cover, a fence body, and a lower cover that are fixedly connected from top to bottom. A tungsten steel alloy tool is placed inside the cage structure, and a sealing cover is connected to the surface of the upper cover by interference fitting. The circumferential surfaces of the upper cover and the lower cover are inlaid with sealing rings.

[0007] Furthermore, a cone is integrally formed on the surface of the lower cover, and the tip of the cone faces vertically upward.

[0008] Furthermore, an internal thread is provided on the top of the inner circumference of the inner cylinder, and an external thread is provided on the outer circumference of the cover.

[0009] Furthermore, a sealing ring is embedded in the middle of the cover, and the lifting rod is connected to the inner circle of the sealing ring by interference fit.

[0010] Furthermore, a horizontal handle is fixed vertically on the top of the lifting rod, ball handles are fixed on both sides of the top surface of the cover, and a T-shaped handle is fixed on the top surface of the blocking cover.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The technical solution of the present application is to place a tungsten steel alloy tool inside a cage structure, and use a lifting rod to push the cage structure into the cage. When the tungsten steel alloy tool is strengthened, the sealing ring is in contact with the inner circle of the inner cylinder to prevent the nitriding furnace gas from leaking out. After the strengthening is completed, the salt liquid on the surface of the lower cover is thrown off by rotating the lifting rod and the cage structure is lifted. During the process, a small amount of nitriding furnace gas will enter the inner cylinder, and the sealing ring of the lower cover is in contact with the feed channel. At this time, the nitriding furnace gas stops leaking, and the gas entering the inner cylinder is pumped into the collection tank through a pipeline for temporary storage. The structure is simple and has high sealing performance, which greatly improves the nitriding furnace gas leakage protection level and enhances operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a three-dimensional diagram of a device for toughening the cutting edge of a tungsten carbide tool;

[0015] Figure 2 is a structural diagram of the cage structure;

[0016] Figure 3 It is a structural diagram of a double-layer cylinder;

[0017] Figure 4 This is a cross-sectional view of a device for toughening the cutting edge of a tungsten carbide tool.

[0018] In the figure: 1. Nitriding furnace body; 101. Feed channel; 102. Cage; 2. Double-layer cylinder; 201. Outer cylinder; 202. Inner cylinder; 203. Exhaust hole; 3. Lifting rod; 4. Sealing cover; 5. Pipeline; 6. Collecting tank; 7. Cage structure; 701. Upper cover; 702. Sealing ring; 703. Fence body; 704. Lower cover; 705. Sealing cover. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1, as Figure 1-4 As shown, the utility model provides a technical solution: a tungsten steel carbide tool edge toughening treatment device, comprising a nitriding furnace body 1, a feed channel 101 is opened on the top of the nitriding furnace body 1, a cage 102 is fixedly arranged below the feed channel 101, a double-layer cylinder 2 is fixedly arranged on the top of the nitriding furnace body 1 by bolts, the double-layer cylinder 2 includes an outer cylinder 201 and an inner cylinder 202 arranged concentrically, the inner diameter of the inner cylinder 202 is consistent with the inner diameter of the feed channel 101, the inner circle of the inner cylinder 202 is vertically aligned with the feed channel 101 and is tightly fitted, a plurality of exhaust holes 203 are opened around the circumferential surface of the bottom end of the inner cylinder 202, and the outer cylinder 201 is connected to the collection tank 6 through a pipe 5;

[0021] The inner circular top of the inner cylinder 202 is threadedly connected to a sealing cover 4, a lifting rod 3 is provided through the middle of the sealing cover 4, and the bottom end of the lifting rod 3 is fixedly connected to a cage structure 7. The cage structure 7 includes an upper cover 701, a fence body 703, and a lower cover 704 that are fixedly connected in sequence from top to bottom. A tungsten steel alloy tool is placed inside the cage structure 7. The surface of the upper cover 701 is interference fitted with a blocking cover 705, and the circumferential surfaces of the upper cover 701 and the lower cover 704 are both inlaid with sealing rings 702.

[0022] In a specific embodiment of the present invention, a one-way valve and an air pump are installed on the pipeline 5 to pump the gas entering the inner cylinder 202 into the collection tank 6 through the pipeline 5 for temporary storage;

[0023] In the initial state, the positions of the components are as follows: Figure 4In the position shown, the sealing rings 702 of the upper cover 701 and the lower cover 704 are both fitted with the inner circle of the inner cylinder 202. At this time, the gas of the nitriding furnace body 1 cannot enter the inner circle area of ​​the inner cylinder 202. The sealing cover 4 blocks the top area of ​​the inner circle of the inner cylinder 202. The workpiece is located inside the cage structure 7. When the tungsten steel alloy tool needs to be strengthened, the lifting rod 3 is used to push the cage structure 7 into the cage 102. However, it is necessary to keep the sealing ring 702 of the upper cover 701 in contact with the inner circle of the inner cylinder 202 to prevent the nitriding furnace gas from leaking to the area above the upper cover 701. After the strengthening is completed, the lifting rod 3 is rotated to separate the salt solution on the surface of the lower cover 704 and the workpiece, and the cage structure 7 is lifted. During the lifting process, a small amount of nitrogen will enter the inner cylinder 202 and the inner circle area of ​​the outer cylinder 201 until the sealing ring 702 of the lower cover 704 is in contact with the feed channel 101. At this time, the nitriding furnace body 1 and the inner cylinder 202 are sealed and isolated by the lower cover 704 and the sealing ring 702. Then, the vacuum pump is turned on to draw the gas inside the inner cylinder 202 and the inner circle area of ​​the outer cylinder 201 into the collection tank 6 for temporary storage. The gas in the inner cylinder 202 enters the inner circle area of ​​the outer cylinder 201 through the exhaust hole 203. The gas in the inner circle area of ​​the outer cylinder 201 is drawn into the collection tank 6 through the pipeline 5. Then, the sealing cover 4 is rotated and the blocking cover 705 is removed. The tungsten steel alloy tool inside the cage structure 7 can be safely taken out.

[0024] In the preferred technical solution, a cone is integrally formed on the surface of the lower cover 704 , with the tip of the cone pointing vertically upward. The slope of the cone can reduce the amount of salt solution adhering to the surface of the lower cover 704 .

[0025] In the preferred technical solution, an internal thread is provided at the top of the inner circumference of the inner cylinder 202 , and an external thread is provided on the outer circumference of the cover 4 , so that the cover 4 can be firmly connected to the inner circumference of the inner cylinder 202 .

[0026] In the preferred technical solution, a sealing ring is embedded in the middle of the cover 4, and the lifting rod 3 is connected to the inner circle of the sealing ring by interference fit. The cover 4 is used to prevent the nitriding furnace gas inside the inner cylinder 202 from leaking from the gap of the lifting rod 3.

[0027] In the preferred technical solution, a horizontal handle is fixed vertically on the top of the lifting rod 3, which is convenient for rotation. Ball handles are fixed on both sides of the top surface of the covering cover 4, which are convenient for rotating the covering cover 4. A T-shaped handle is fixed on the top surface of the blocking cover 705, which is convenient for rotating the blocking cover 705.

[0028] Working principle: Place the tungsten steel alloy tool inside the cage structure 7, and use the lifting rod 3 to push the cage structure 7 into the cage 102. When the tungsten steel alloy tool is strengthened, the sealing ring 702 is in contact with the inner circle of the inner cylinder 202 to prevent the nitriding furnace gas from leaking out. After the strengthening is completed, the salt solution on the surface of the lower cover 704 is thrown off by rotating the lifting rod 3 and the cage structure 7 is lifted. During the process, a small amount of nitriding furnace gas will enter the inner cylinder 202, and the sealing ring 702 of the lower cover 704 is in contact with the feed channel 101. At this time, the gas stops leaking, and a small amount of nitriding furnace gas is drawn into the collection tank 6 through the pipeline 5 for temporary storage, thereby ensuring that when the tungsten steel alloy tool is taken out from the cage structure 7, it will not encounter the high concentration of nitriding furnace internal gas, thereby improving safety.

Claims

1. A device for toughening the cutting edge of a tungsten carbide tool, comprising a nitriding furnace body (1), a feeding channel (101) being provided on the top of the nitriding furnace body (1), and a cage (102) being fixedly provided below the feeding channel (101), characterized in that: A double-layer cylinder (2) is fixed on the top of the nitriding furnace body (1) by bolts, and the double-layer cylinder (2) comprises an outer cylinder (201) and an inner cylinder (202) arranged concentrically, the inner diameter of the inner cylinder (202) being consistent with the inner diameter of the feed channel (101), and a plurality of exhaust holes (203) are provided around the circumferential surface of the bottom end of the inner cylinder (202), and the outer cylinder (201) is connected to the collection tank (6) via a pipe (5); The inner dome of the inner cylinder (202) is threadedly connected to a sealing cover (4), a lifting rod (3) is provided through the middle of the sealing cover (4), and the bottom end of the lifting rod (3) is fixedly connected to a cage structure (7), the cage structure (7) comprises an upper cover (701), a fence body (703), and a lower cover (704) fixedly connected in sequence from top to bottom, a tungsten steel alloy tool is placed inside the cage structure (7), the surface of the upper cover (701) is interference-fitted with a sealing cover (705), and the circumferential surfaces of the upper cover (701) and the lower cover (704) are both inlaid with sealing rings (702).

2. The device for toughening the cutting edge of a tungsten carbide tool according to claim 1, characterized in that: A cone is integrally formed on the surface of the lower cover (704), with the tip of the cone pointing vertically upwards.

3. The device for toughening the cutting edge of a tungsten carbide tool according to claim 1, characterized in that: An internal thread is provided at the top of the inner circumference of the inner cylinder (202), and an external thread is provided at the outer circumference of the cover (4).

4. The device for toughening the cutting edge of a tungsten carbide tool according to claim 3, characterized in that: A sealing ring is embedded in the middle of the sealing cover (4), and the lifting rod (3) is connected to the inner circle of the sealing ring through interference fit.

5. The device for toughening the cutting edge of a tungsten carbide tool according to claim 1, characterized in that: A horizontal handle is fixedly provided vertically on the top of the lifting rod (3), ball handles are fixedly provided on both sides of the top surface of the sealing cover (4), and a T-shaped handle is fixedly provided on the top surface of the blocking cover (705).

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