Quenching furnace for powder metallurgy

Abstract

The utility model relates to the technical field of powder metallurgy, in particular to a quenching furnace for powder metallurgy, which comprises a furnace body, the furnace body is of a structure with two open ends, positioning mechanisms are fixedly connected to the two ends of the furnace body, conveying mechanisms are arranged on the opposite sides of the two positioning mechanisms in a matched mode, and each positioning mechanism comprises a ring body. According to the device, a rod-shaped workpiece is placed in the two ring bodies, the two driving motors are started to drive the two rotating drums to rotate synchronously through the gears, the two rotating drums wind a plurality of adjacent pull ropes on the rotating drums synchronously, and therefore the pull ropes pull the adjacent sliding plates synchronously to move by the same distance; the multiple sliding plates abut against and move the workpiece to the center of the ring body, then the two conveying mechanisms are used for driving the workpiece to move and pass through the furnace body, the carrier rollers rotate to drive the workpiece to pass through the interior of the furnace body to be heated, and therefore the workpiece is always located in the center of the electromagnetic induction coil when continuously heated through the furnace body, and the heating effect of the workpiece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a quenching furnace for powder metallurgy. Background Technique

[0002] Powder metallurgy is a process technology that uses metal powders as raw materials and makes finished products after forming and sintering. After using powder metallurgy to make workpieces and forming the workpieces, generally in order to improve the physical properties of the workpieces, the workpieces are often quenched, that is, the workpieces are first heated and then cooled. When quenching, a quenching furnace is used. Some of the existing quenching furnaces use electromagnetic induction heating to heat-treat the workpieces. There will be an electromagnetic induction coil inside this kind of furnace body. When the workpiece is placed in the coil, the workpiece can be heated without contacting the coil. When the furnace body heats a long rod-shaped workpiece, the rod-shaped workpiece can be conveyed through the inside of the furnace body to enable the furnace body to continuously heat the workpiece;

[0003] The principle of electromagnetic induction heating is to use the principle of electromagnetic induction to generate eddy currents in the workpiece, thereby converting electrical energy into heat energy to heat the workpiece. The center of the coil is usually a uniform area where the magnetic field is generated. When the workpiece is located at the center of the coil, more uniform eddy currents can be generated inside it, and the magnetic field intensity at the center of the coil is usually higher. Therefore, when the workpiece is at the center position, the induced current (eddy current) is stronger and the heating efficiency is also higher. However, the existing quenching furnaces do not have a positioning structure for the workpiece, resulting in the workpiece may deviate from the center of the coil, which is rather inconvenient. Content of the Utility Model

[0004] The purpose of the utility model is to provide a quenching furnace for powder metallurgy to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A quenching furnace for powder metallurgy includes a furnace body. The furnace body has an open structure at both ends, and positioning mechanisms are fixedly connected to both ends of the furnace body. Conveying mechanisms are arranged in a supporting manner at the sides of the two positioning mechanisms facing away from each other;

[0007] The positioning mechanism includes a ring body, and a plurality of connecting rods are fixedly connected between one side of the ring body and the end of the adjacent furnace body. A snap ring is fixedly connected to the other side of the ring body, and the cross-section of the snap ring is L-shaped. A rotating cylinder is arranged on the other side of the ring body, and an annular groove is opened at one end of the inner side wall of the rotating cylinder. One end of the outer side wall of the snap ring is rotatably sleeved inside the annular groove. A plurality of sliding openings are opened on the outer side wall of the ring body, and a sliding plate is slidably sleeved inside each of the plurality of sliding openings. A plurality of limiting frames are fixedly connected to the other side of the ring body, and the plurality of limiting frames correspond to the plurality of sliding plates one by one. One end of each of the plurality of sliding plates is fixedly connected with a pull rope, and one end of each of the plurality of pull ropes penetrates through the corresponding limiting frame, and one end of each of the plurality of pull ropes is fixedly connected to the outer side wall of the rotating cylinder.

[0008] Further, the other ends of the plurality of sliding plates are rotatably connected with abutting wheels.

[0009] Further, two rotating rollers are rotatably connected between the two opposite inner side walls of each of the plurality of limiting frames, and the plurality of pull ropes are located between the adjacent two rotating rollers.

[0010] Further, motor boxes are fixedly connected to both ends of the furnace body, and driving motors are arranged inside the two motor boxes. The motor shafts of the two driving motors are fixedly connected with gears, and a plurality of tooth blocks are fixedly connected to the outer side walls of the rotating cylinders on the two positioning mechanisms. The two gears are respectively meshed with the adjacent tooth blocks on the two positioning mechanisms.

[0011] Further, the conveying mechanism includes a U-shaped plate, and a sliding frame is slidably clamped between the two arms of the U-shaped plate. A plurality of supporting rollers are rotatably connected between the two opposite inner side walls of the sliding frame. A chute is opened on one side of the U-shaped plate. A slider is fixedly connected to one side of the sliding frame, and the slider is slidably clamped inside the chute. A driving box is fixedly connected to one side of the slider, and a power motor is arranged inside the driving box. The motor shaft of the power motor penetrates through the slider and one side of the sliding frame and is fixedly connected to one end of a supporting roller.

[0012] Further, a U-shaped frame is arranged above the U-shaped plate. One ends of the two arms of the U-shaped frame are respectively fixedly connected to the top ends of the two arms of the U-shaped plate, and a heat insulation box is fixedly connected to the top surface of the U-shaped frame. An automatic winch is arranged inside the heat insulation box, and a steel wire rope is provided for the automatic winch. A connecting frame is arranged between the two arms of the U-shaped plate, and the connecting frame is U-shaped. One ends of the two arms of the connecting frame are respectively fixedly connected to the centers of the two long side edges of the top surface of the sliding frame. One end of the steel wire rope penetrates through the inner top surface of the U-shaped frame and is fixedly connected to the center of the top surface of the connecting frame.

[0013] Further, an abrasive layer is fixedly connected to the outer side wall of the supporting roller.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] By placing the rod-shaped workpiece into the two ring bodies, and then starting the two driving motors to drive the two rotating drums to rotate synchronously through gears, the two rotating drums will synchronously wind multiple adjacent pull ropes around themselves, so that the multiple pull ropes synchronously pull the adjacent slides to move the same distance, so that the multiple slides will move the workpiece to the center of the ring body against the workpiece, and by starting two automatic winches to retract and release the wire rope to adjust the height of the two slide frames, the workpiece is supported by the rollers on the slide frames, and then starting the two power motors to rotate the rollers to drive the workpiece to pass through the furnace body for heating, so that the workpiece is always located in the center of the electromagnetic induction coil when it passes through the furnace body for continuous heating, thereby improving the heating effect of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the positioning mechanism and the conveying mechanism in the utility model;

[0018] Figure 3 It is an exploded diagram of the positioning mechanism structure in the utility model;

[0019] Figure 4 It is an exploded diagram of the conveying mechanism structure in the utility model.

[0020] In the figure: 100, furnace body; 200, positioning mechanism; 210, ring body; 211, slide; 212, snap ring; 213, connecting rod; 220, rotating drum; 221, annular groove; 222, tooth block; 230, slide plate; 231, stop wheel; 232, pull rope; 240, limit frame; 241, roller; 300, motor box; 301, gear; 400, conveying mechanism; 410, U-shaped plate; 411, slide groove; 420, slide frame; 421, roller; 430, slider; 431, drive box; 440, U-shaped frame; 441, heat insulation box; 442, wire rope; 443, connecting frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4In an embodiment of the utility model, a quenching furnace for powder metallurgy includes a furnace body 100, the furnace body 100 is an open structure at both ends, and both ends of the furnace body 100 are fixedly connected with positioning mechanisms 200, and the two positioning mechanisms 200 are both equipped with conveying mechanisms 400 at opposite sides;

[0023] The positioning mechanism 200 includes a ring body 210, and a plurality of connecting rods 213 are fixedly connected between one side of the ring body 210 and the end of the adjacent furnace body 100, and a clamping ring 212 is fixedly connected to the other side of the ring body 210, and the cross section of the clamping ring 212 is L-shaped, and a rotating drum 220 is arranged on the other side of the ring body 210, and an annular groove 221 is opened at one end of the inner wall of the rotating drum 220, and one end of the outer wall of the clamping ring 212 is rotatably sleeved inside the annular groove 221, and the outer wall of the ring body 210 is fixedly connected to the inner wall of the annular groove 221. The side wall is provided with a plurality of sliding openings 211, and a slide plate 230 is slidably sleeved inside the plurality of sliding openings 211, a plurality of limit frames 240 are fixedly connected to the other side of the ring body 210, and the plurality of limit frames 240 correspond one to one to the plurality of slide plates 230, a pull rope 232 is fixedly connected to one end of the plurality of slide plates 230, and one end of the plurality of pull ropes 232 passes through the corresponding limit frames 240, and one end of the plurality of pull ropes 232 is fixedly connected to the outer wall of the rotating drum 220.

[0024] Specifically, the furnace body 100 is an electromagnetic induction heating quenching furnace, and an electromagnetic induction coil is arranged inside the furnace body 100. The central axis of the electromagnetic induction coil coincides with the central axis of the openings at both ends of the furnace body 100. By inserting the rod-shaped workpiece into the ring body 210 of the two positioning mechanisms 200, and making the central axis of the ring body 210 coincide with the central axis of the electromagnetic induction coil between the multiple slides 230 located on the same ring body 210, and then rotating the two rotating drums 220, so that the rotating drums 220 simultaneously pull one end of multiple pull ropes 232, and make the multiple pull ropes 232 partially wrapped around the rotating drum 220, thereby pulling the multiple slides 230 to move synchronously toward the center of the ring body 210, so that the multiple slides 230 synchronously resist the rod-shaped workpiece and move toward the center of the ring body 210, so as to facilitate the positioning of the rod-shaped workpiece by the multiple slides 230 on the two ring bodies 210 to the center of the electromagnetic induction coil, so as to improve the heating efficiency of the workpiece. Embodiment 1

[0025] like Figures 2 - 3As shown, in this embodiment, a counter wheel 231 is rotatably connected to the other end of each of the plurality of sliding plates 230. Two rollers 241 are rotatably connected between the two opposite inner side walls of each of the plurality of limiting frames 240. Each of the plurality of pulling ropes 232 is located between two adjacent rollers 241. Both ends of the furnace body 100 are fixedly connected with motor boxes 300, and a driving motor is arranged inside each of the two motor boxes 300. The motor shafts of the two driving motors are fixedly connected with gears 301. A plurality of tooth blocks 222 are fixedly connected to the outer side wall of the drum 220 on each of the two positioning mechanisms 200. The two gears 301 are respectively meshed with the adjacent tooth blocks 222 on the two positioning mechanisms 200.

[0026] In this embodiment, the counter wheel 231 facilitates the movement of the workpiece after the sliding plate 230 abuts against the workpiece. The rollers 241 further limit the pulling rope 232 and facilitate the movement of the pulling rope 232. During use, the two driving motors can be started to drive the adjacent gears 301 to rotate, thereby controlling the rotation of the two drums 220.

[0027] As Figure 2 and Figure 4 As shown, in this embodiment, the conveying mechanism 400 includes a U-shaped plate 410. A sliding frame 420 is slidably clamped between the two arms of the U-shaped plate 410. A plurality of supporting rollers 421 are rotatably connected between the two opposite inner side walls of the sliding frame 420. A chute 411 is formed on one side of the U-shaped plate 410. A slider 430 is fixedly connected to one side of the sliding frame 420, and the slider 430 is slidably clamped inside the chute 411. A driving box 431 is fixedly connected to one side of the slider 430, and a power motor is arranged inside the driving box 431. The motor shaft of the power motor penetrates through the slider 430 and the side of the sliding frame 420 and is fixedly connected to one end of a supporting roller 421.

[0028] During specific implementation, first place the workpiece on the supporting roller 421 of one conveying mechanism 400, and then start the adjacent power motor to make one supporting roller 421 rotate. Utilize the friction between the supporting roller 421 and the surface of the workpiece to drive the workpiece into the furnace body 100, and make one end of the workpiece pass through the inside of the ring body 210 on the other positioning mechanism 200. Then start the electromagnetic induction coil inside the furnace body 100 to heat the workpiece. Then continue to start the power motors on the two conveying mechanisms 400 to drive the whole workpiece through the inside of the furnace body 100 to continuously heat the workpiece. Then, when the end of the workpiece is located inside the adjacent ring body 210 of one conveying mechanism 400, continue to heat the end workpiece inside the furnace body 100. After heating is completed, turn off the electromagnetic induction coil, and use the supporting roller 421 to completely send the workpiece out of the furnace body 100. Embodiment Two

[0029] Based on Embodiment One, an automatic winch is provided to facilitate the user to control the height of the sliding frame 420.

[0030] AsFigure 2 and Figure 4 As shown in Figure 4 , in this embodiment, a U-shaped frame 440 is provided above the U-shaped plate 410. One end of each arm of the U-shaped frame 440 is fixedly connected to the top end of each arm of the U-shaped plate 410, and a heat insulation box 441 is fixedly connected to the top surface of the U-shaped frame 440. An automatic winch is arranged inside the heat insulation box 441, and a steel wire rope 442 is provided for the automatic winch. A connecting frame 443 is arranged between the two arms of the U-shaped plate 410, and the connecting frame 443 is U-shaped. One end of each arm of the connecting frame 443 is fixedly connected to the center of the two long side edges of the top surface of the sliding frame 420. One end of the steel wire rope 442 passes through the inner top surface of the U-shaped frame 440 and is fixedly connected to the center of the top surface of the connecting frame 443. A grinding layer is fixedly connected to the outer side wall of the idler 421.

[0031] During specific implementation, when it is necessary to convey workpieces, the workpieces can be placed on multiple idlers 421, and then the automatic winch is started to wind and unwind the steel wire rope 442 to control the height of the sliding frame 420. Thus, after the sliding frame 420 is moved to a suitable height, the power motor is started to make the workpieces enter the interiors of the two ring bodies 210. Then, the two driving motors are started to drive the two rotating cylinders 220 to rotate, so that multiple sliding plates 230 on the two ring bodies 210 move synchronously, and the workpieces are abutted against the center of the electromagnetic induction coil. Then, the user can fine-tune the heights of the two sliding frames 420 according to the positioned height of the workpieces, so that the idlers 421 on the two sliding frames 420 are in contact with the workpieces. The friction between the surface of the idler 421 and the surface of the workpiece is increased through the grinding layer, and the rotation of the idler 421 drives the workpiece to move.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0033] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quenching furnace for powder metallurgy, comprising a furnace body (100), characterized in that: The furnace body (100) is a structure with openings at both ends, and positioning mechanisms (200) are fixedly connected to both ends of the furnace body (100), and conveying mechanisms (400) are matchedly arranged at opposite sides of the two positioning mechanisms (200); The positioning mechanism (200) comprises a ring body (210), and a plurality of connecting rods (213) are fixedly connected between one side of the ring body (210) and the end of an adjacent furnace body (100), and a clamping ring (212) is fixedly connected to the other side of the ring body (210), and the cross section of the clamping ring (212) is L-shaped, and a rotating drum (220) is arranged on the other side of the ring body (210), and an annular groove (221) is formed at one end of the inner wall of the rotating drum (220), and one end of the outer wall of the clamping ring (212) is rotatably sleeved inside the annular groove (221), and the ring body (2 10) The outer wall is provided with a plurality of sliding openings (211), and a slide plate (230) is slidably sleeved inside the plurality of sliding openings (211), a plurality of limit frames (240) are fixedly connected to the other side of the ring body (210), and the plurality of limit frames (240) correspond one to one to the plurality of slide plates (230), one end of the plurality of slide plates (230) is fixedly connected to a pull rope (232), and one end of the plurality of pull ropes (232) passes through the corresponding limit frames (240), and one end of the plurality of pull ropes (232) is fixedly connected to the outer wall of the rotating drum (220).

2. A quenching furnace for powder metallurgy according to claim 1, characterized in that: The other ends of the plurality of slide plates (230) are all rotatably connected to a stop wheel (231).

3. A quenching furnace for powder metallurgy according to claim 2, characterized in that: Two rollers (241) are rotatably connected between two opposite inner side walls of the plurality of limit frames (240), and the plurality of pull ropes (232) are located between two adjacent rollers (241).

4. A quenching furnace for powder metallurgy according to claim 3, characterized in that: Motor boxes (300) are fixedly connected to both ends of the furnace body (100), and drive motors are arranged inside the two motor boxes (300), and the motor shafts of the two drive motors are fixedly connected to gears (301), and the outer side walls of the rotating drums (220) on the two positioning mechanisms (200) are fixedly connected to a plurality of tooth blocks (222), and the two gears (301) are respectively meshed with adjacent tooth blocks (222) on the two positioning mechanisms (200).

5. A quenching furnace for powder metallurgy according to claim 4, characterized in that: The conveying mechanism (400) comprises a U-shaped plate (410), and a slide frame (420) is slidably engaged between two arms of the U-shaped plate (410), and a plurality of rollers (421) are rotatably connected between two opposite inner side walls of the slide frame (420), and a slide groove (411) is provided on one side of the U-shaped plate (410), and a slider (430) is fixedly connected to one side of the slide frame (420), and the slider (430) is slidably engaged inside the slide groove (411), and a drive box (431) is fixedly connected to one side of the slider (430), and a power motor is arranged inside the drive box (431), and a motor shaft of the power motor passes through the slider (430) and one side of the slide frame (420) and is fixedly connected to one end of a roller (421).

6. A quenching furnace for powder metallurgy according to claim 5, characterized in that: A U-shaped frame (440) is arranged above the U-shaped plate (410), one end of two arms of the U-shaped frame (440) are respectively fixedly connected to the top ends of the two arms of the U-shaped plate (410), and a heat insulation box (441) is fixedly connected to the top surface of the U-shaped frame (440), an automatic winch is arranged inside the heat insulation box (441), and the automatic winch is matched with a steel wire rope (442), a connecting frame (443) is arranged between the two arms of the U-shaped plate (410), and the connecting frame (443) is U-shaped, one end of two arms of the connecting frame (443) are respectively fixedly connected to the centers of two long sides of the top surface of the sliding frame (420), and one end of the steel wire rope (442) passes through the inner top surface of the U-shaped frame (440) and is fixedly connected to the center of the top surface of the connecting frame (443).

7. A quenching furnace for powder metallurgy according to claim 6, characterized in that: The outer side wall of the roller (421) is fixedly connected with a frosted layer.

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