Controllable atmosphere well type nitriding furnace

Abstract

The utility model relates to a controllable atmosphere well type nitriding furnace, which belongs to the technical field of nitriding furnaces, and comprises a furnace body and a furnace cover, the upper end of the furnace body is fixedly provided with clamping jaws in a circumferential array, the outer side of the upper end of the furnace cover is fixedly provided with supporting jaws in a circumferential array, the supporting jaws are in threaded connection with lead screws, and the lead screws in the circumferential array are linked. The servo motor is provided with a plurality of lead screws, the lower ends of the lead screws are rotatably provided with limiting plates, the limiting plates are clamped to the clamping jaws, the upper ends of the lead screws are fixedly provided with gears, the lead screws are in linkage through the gears, the gears are of an I-shaped structure, the gears are sleeved with inner gear rings, and the gears are in linkage through the inner gear rings. Meanwhile, the multiple lead screws are driven, so that the limiting plates and the clamping jaws are pressed tightly, then the furnace cover is pressed on the furnace body, the sealing uniformity of connection between the furnace cover and the furnace body is improved, the risk of gas leakage is avoided, the tightening force is convenient to control, operation is convenient, and adjustment is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitriding furnace technical field, especially a controllable atmosphere well type nitriding furnace. BACKGROUND

[0002] Nitriding processing is a chemical heat treatment process that makes nitrogen atoms penetrate into the surface layer of workpieces in a certain medium at a certain temperature. Common methods include liquid nitriding, gas nitriding and ion nitriding. In traditional gas nitriding, workpieces are placed in a sealed container, ammonia gas is introduced and heated, and after a long period of heat preservation, active nitrogen atoms are produced by thermal decomposition of ammonia gas, which are constantly adsorbed onto the surface of the workpiece and diffuse into the surface layer of the workpiece, thereby changing the chemical composition and structure of the surface layer and obtaining excellent surface properties. Gas nitriding requires the use of a nitriding furnace, and a controllable atmosphere well type nitriding furnace is a gas nitriding equipment that controls the nitrogen concentration and phase structure of the surface of nitriding parts by adjusting the nitrogen potential of the furnace gas. It is widely used in the processing of some parts and components. When using the nitriding furnace, the furnace cover needs to be sealed to the furnace body to prevent gas leakage. Currently, a circumferential array of locks is used to connect the furnace body and the furnace cover. However, when connecting, each lock needs to be manually twisted. When the twisting force of each lock is different, gas leakage may occur at the twisted position of the lock, the sealing uniformity is poor, and the sealing effect is not good, making it inconvenient to operate. SUMMARY

[0003] To overcome the technical defects of the prior art, the utility model provides a controllable atmosphere well type nitriding furnace, which improves the sealing effect of the connection between the furnace cover and the furnace body, improves the uniformity of the sealing, and avoids gas leakage.

[0004] The utility model discloses a technical solution is: a controllable atmosphere well type nitriding furnace, including furnace body and furnace cover, the furnace cover is sealed to the upper end of furnace body, and the upper end of furnace body is fixedly installed with dog -claw in the circumferential array, the upper end outside of furnace cover is fixedly installed with support claw in the circumferential array, the screw rod is threadedly connected on the support claw, the screw rod of circumferential array is linked, the lower end of screw rod is rotatably installed with limit stop, the limit stop is clamped on the dog -claw, when using, the workpiece needing nitriding processing is placed in the inside of furnace body, then the furnace cover is installed on the top of furnace body, the furnace body is sealed, and when sealing, the limit stop is first passed through the dog -claw, and the limit stop is rotated on the screw rod, so that the limit stop rotates ninety degrees, then the screw rod is rotated, so that the screw rod rises along the support claw, and the upper end of limit stop is pressed tightly with the lower surface of dog -claw, the sealing effect between the furnace body and the furnace cover is improved by adjusting the pressing degree, and when one of the screw rod is rotated, because the screw rod is linked, all the screw rod is rotated, and the rotation amplitude is same, and the uniformity of the sealing between the furnace cover and the furnace body is improved, and the gas leakage caused by the different pressing degree on one side is avoided.

[0005] Preferably, the dog -claw is L-shaped structure, and the upper end of the dog -claw is provided with a notch, the limit stop is a waist-shaped structure, the limit stop is clamped in the inside of the dog -claw through the notch, through the notch, the limit stop is extended to the inside of the dog -claw, and when the limit stop is rotated, the limit stop is clamped in the inside of the dog -claw, and when the limit stop is pulled by the screw rod, the furnace cover and the furnace body are pressed tightly, and the sealing of connection is improved.

[0006] Preferably, the upper end of the furnace cover is fixedly installed with a fixed frame, and the upper end of the fixed frame is a cross-shaped structure, and the upper end of the fixed frame is fixedly installed with a lifting ring in a circumferential array, and the lifting ring is used to adopt an external gantry or hoisting equipment to facilitate lifting the furnace cover.

[0007] Preferably, the upper end of the fixed frame is fixedly installed with a servo motor on one side, the output end of the servo motor is fixedly installed with a sleeve with a cross-shaped through hole, the sleeve extends to the lower end of the fixed frame, and the lower end of the sleeve is inserted with a cross-shaped insertion rod, when the servo motor rotates, the sleeve rotates, and the insertion rod is inserted in the inside of the sleeve, and the insertion rod is a cross-shaped structure, so that the sleeve drives the insertion rod to rotate, and the screw rod is driven.

[0008] Preferably, the lower end of the plug-in rod is fixedly connected with the upper end of one of the lead screws, when the plug-in rod rotates, the lead screw rotates, and the lead screw is screwed on the supporting claw, when the lead screw rotates, the lead screw generates a lifting stroke, thereby adjusting the length of the plug-in rod inserted into the sleeve, avoiding affecting the lifting of the lead screw.

[0009] Preferably, the upper end of the lead screw is fixedly provided with a gear, and the lead screws are connected through the gear, and through the gear, when one of the lead screws is driven by the servo motor, the gear rotates, thereby driving all the lead screws to rotate.

[0010] Preferably, the gear is an I-shaped structure, the gears are sleeved with an internal gear ring, the gears are connected through the internal gear ring, and since the gear is an I-shaped structure, the internal gear ring is conveniently positioned in the up and down positions, and when one of the gears rotates, the internal gear ring rotates, thereby driving all the gears to rotate, so that the lead screws rotate synchronously.

[0011] Preferably, the upper end of the furnace cover is fixedly provided with a detector on one side, and the end of the supporting claw is vertically fixedly provided with an internally threaded pipe, and the lead screw is screwed in the internally threaded pipe, through the detector, the nitrogen content in the furnace body is conveniently detected, and through the internally threaded pipe, when the lead screw rotates, the lead screw ascends and descends along the internally threaded pipe.

[0012] The beneficial effects of the utility model are: through the linkage of the lead screws, when the servo motor rotates, the plurality of lead screws are driven at the same time, the limiting plate and the claw are pressed tightly, thereby the furnace cover is pressed tightly on the furnace body, the sealing uniformity of the connection between the furnace cover and the furnace body is improved, the risk of gas leakage is avoided, the tightening force is conveniently controlled, the operation is facilitated, and the adjustment is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the whole utility model.

[0014] Figure 2 It is a schematic structural diagram of the whole utility model. Figure 1 It is a schematic structural diagram of the position A in the utility model.

[0015] Figure 3 It is a schematic structural diagram of the position of the furnace cover in the utility model.

[0016] Figure 4 It is a schematic structural diagram of the position A in the utility model. Figure 3 It is a schematic structural diagram of the position B in the utility model.

[0017] Figure 5 It is the structure diagram of the position of the servo motor of the utility model.

[0018] Figure 6 It is the structure diagram of the position of the servo motor of the utility model.

[0019] Mark explanation: in drawing: 1, furnace body;2, furnace cover;3, claw;4, supporting claw;5, screw rod;6, limiting plate;7, fixed frame;8, hoisting ring;9, servo motor;10, sleeve;11, plug-in rod;12, gear;13, inner gear ring;14, detector;15, internal thread pipe. Specific implementation

[0020] The utility model is further described below in combination with drawings:

[0021] As Figures 1-6 shown, the embodiment provides a controllable atmosphere well type nitriding furnace, including furnace body 1 and furnace cover 2, furnace cover 2 is sealed to the upper end of furnace body 1, and the upper end of furnace body 1 is fixedly installed with claw 3 in circumferential array, the outer side of the upper end of furnace cover 2 is fixedly installed with supporting claw 4 in circumferential array, supporting claw 4 is threadedly connected with screw rod 5, screw rod 5 between the circumferential array is linked, the lower end of screw rod 5 is rotatably installed with limiting plate 6, limiting plate 6 is clamped on claw 3, the upper end of furnace cover 2 is fixedly installed with detector 14 on one side, and the end position of supporting claw 4 is vertically fixedly installed with internal thread pipe 15, screw rod 5 is threadedly connected in the inside of internal thread pipe 15, by detector 14, it is convenient to detect the nitrogen content in the inside of furnace body 1, it is convenient to control the ammonia gas amount of being passed in, and then the effect of controlling atmosphere is reached, and by internal thread pipe 15, when screw rod 5 rotates, make screw rod 5 along internal thread pipe 15 and lift, when using, the workpiece needing nitriding processing is placed in the inside of furnace body 1, then furnace cover 2 is installed on the upper of furnace body 1, furnace body 1 is sealed, and when sealing, first, limiting plate 6 is passed through claw 3, and limiting plate 6 is rotated on screw rod 5, make limiting plate 6 rotate ninety degrees, then rotate screw rod 5, make screw rod 5 ascend along supporting claw 4, then make the upper end of limiting plate 6 and the lower surface of claw 3 be pressed tightly, by adjusting the pressing intensity, the sealing effect between furnace body 1 and furnace cover 2 is improved, and when one of screw rod 5 is rotated, because screw rod 5 is linked, make all screw rod 5 rotate, and the rotation amplitude is same, then the uniformity of sealing between furnace cover 2 and furnace body 1 is improved, avoid the pressing intensity of one side to be different, lead to gas leakage, and after installing furnace cover 2, by passing in flowing ammonia gas in the inside of furnace body 1, and heating, ammonia gas thermal decomposition produces active nitrogen atom, the surface of workpiece is penetrated, it is convenient to process, and nitrogen potential and the nitrogen concentration of nitriding part surface are controlled, atmosphere is controlled, it is convenient to use.

[0022] As a technical optimization scheme of the utility model, specifically as shown in Figure 6 The upper end of the claw 3 is provided with a notch, the limiting plate 6 is a waist-shaped structure, the limiting plate 6 extends to the inside of the claw 3 through the notch, and the limiting plate 6 is clamped in the inside of the claw 3 when the limiting plate 6 is rotated, so that the furnace cover 2 is lowered when the limiting plate 6 is pulled through the screw rod 5, and the furnace cover 2 is pressed against the furnace body 1, improving the sealing of the connection.

[0023] As a technical optimization scheme of the utility model, specifically as shown in Figures 2 to 4 The upper end of the claw 3 is provided with a notch, the limiting plate 6 is a waist-shaped structure, the limiting plate 6 extends to the inside of the claw 3 through the notch, and the limiting plate 6 is clamped in the inside of the claw 3 when the limiting plate 6 is rotated, so that the furnace cover 2 is lowered when the limiting plate 6 is pulled through the screw rod 5, and the furnace cover 2 is pressed against the furnace body 1, improving the sealing of the connection.

[0024] The basic principle, main features and advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A controllable atmosphere pit-type nitriding furnace, characterized by: Including furnace body (1) and furnace cover (2), the upper end of the furnace cover (2) seals the upper end of the furnace body (1), and the upper end of the furnace body (1) is fixedly installed with a jaw (3) in a circumferential array, the outer side of the upper end of the furnace cover (2) is fixedly installed with a supporting claw (4) in a circumferential array, the supporting claw (4) is threadedly connected with a lead screw (5), the circumferential array of the lead screw (5) is linked, the lower end of the lead screw (5) is rotatably installed with a limit plate (6), and the limit plate (6) is clamped on the jaw (3).

2. A controllable atmosphere pit-type nitriding furnace according to claim 1, characterized in that: The jaw (3) is L-shaped structure, and the upper end of the jaw (3) is provided with a notch, the limit plate (6) is a waist-shaped structure, and the limit plate (6) extends to the inside of the jaw (3) through the notch.

3. A controllable atmosphere pit-type nitriding furnace according to claim 1, characterized in that: The upper end of the furnace cover (2) is fixedly installed with a fixed frame (7), and the upper end of the fixed frame (7) is a cross-shaped structure, and the upper end of the fixed frame (7) is fixedly installed with a lifting ring (8) in a circumferential array.

4. A controllable atmosphere pit-type nitriding furnace according to claim 3, characterized in that: The upper end of the fixed frame (7) is fixedly installed with a servo motor (9) on one side, the output end of the servo motor (9) is fixedly installed with a sleeve (10) provided with a cross-shaped through hole, the sleeve (10) extends to the lower end of the fixed frame (7), and the lower end of the sleeve (10) is inserted with a cross-shaped plug-in rod (11).

5. A controllable atmosphere pit-type nitriding furnace according to claim 4, characterized in that: The lower end of the plug-in rod (11) is fixedly connected with the upper end of one of the lead screws (5).

6. A controllable atmosphere pit-type nitriding furnace according to claim 1, characterized in that: The upper end of the lead screw (5) is fixedly installed with a gear (12), and the lead screws (5) are linked through the gears (12).

7. A controllable atmosphere pit-type nitriding furnace according to claim 6, characterized in that: The gear (12) is an I-shaped structure, an internal gear ring (13) is sleeved between the gears (12), and the gears (12) are linked through the internal gear ring (13).

8. The controllable atmosphere pit-type nitriding furnace according to claim 1, characterized in that: The upper end of the furnace cover (2) is fixedly installed with a detector (14) on one side, and the end position of the supporting claw (4) is vertically fixedly installed with an internally threaded pipe (15), and the lead screw (5) is threadedly connected in the internally threaded pipe (15).

Images