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CN-121972660-A - Reduced iron powder briquetting device

CN121972660ACN 121972660 ACN121972660 ACN 121972660ACN-121972660-A

Abstract

The application relates to the technical field of powder metallurgy machinery, and discloses a reduced iron powder briquetting device which comprises a base, a mounting frame and a briquetting component. The pressing block assembly utilizes a first motor to drive the eccentric disc, and the contact part is linked with the toggle rod mechanism, so that the upper connecting rod and the lower connecting rod hinged with the toggle rod tend to be collinear. The upper connecting rod and the lower connecting rod synchronously drive the bearing frame to move upwards and the compression joint frame to move downwards through the long and short transmission connecting rods, so that the powder in the forming tube is pressed bidirectionally. In addition, the bearing frame is provided with a knocking component to increase filling density, a double-screw translation mechanism is arranged in the bearing frame to realize station switching, a base is provided with an avoidance groove to optimize the space layout of a motor, a torsion spring and a driven shaft are additionally arranged in a power system, and the auxiliary toggle rod mechanism is forced to retract and reset after the pressing is finished. The application solves the problems of uneven density, insufficient pressure maintaining and low unloading efficiency of the reduced iron powder compact, and has the advantages of high automation degree, excellent molding quality, compact structure and the like.

Inventors

  • CAO AIJUN
  • XU CUILING
  • LI HEHE

Assignees

  • 山东和昇达新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. The reduced iron powder briquetting device is characterized by comprising a base (1), wherein a mounting frame (2) is fixedly arranged on the base (1); The pressing block assembly (3), the pressing block assembly (3) is arranged on the mounting frame (2), the pressing block assembly (3) comprises a toggle rod (31), an upper connecting rod (32) and a lower connecting rod (33), wherein the upper connecting rod (32) is hinged with the upper connecting rod (33), one end of the upper connecting rod (32) deviating from the toggle rod (31) is hinged with an upper connecting block (34), one end of the lower connecting rod (33) deviating from the toggle rod (31) is hinged with a lower connecting block (35), the upper connecting block (34) is connected with a long transmission connecting rod (36) symmetrically penetrating through the mounting frame (2), the lower connecting block (35) is connected with a short transmission connecting rod (37) symmetrically penetrating through the mounting frame (2), one end of the long transmission connecting rod (36) deviating from the upper connecting block (34) is fixedly connected with a bearing frame (38), one end of the short transmission connecting rod (37) deviating from the lower connecting block (35) is fixedly connected with a compression joint frame (39), a forming pipe (381) is movably arranged on the bearing frame (38), and the upper connecting block (381) is provided with a compression joint (391); A power drive mechanism (4), the power drive mechanism (4) comprising a first motor (41), a drive shaft (42) driven to rotate by the first motor (41), and a transmission assembly (43) connected between the drive shaft (42) and the toggle lever (31); Under the driving of the first motor (41), the transmission assembly (43) drives the toggle rod (31) so that the upper connecting rod (32) and the lower connecting rod (33) tend to be collinear, and synchronously drives the bearing frame (38) to move upwards and the compression frame (39) to move downwards, so that the bidirectional compression of the reduced iron powder in the forming pipe (381) is realized.
  2. 2. The device according to claim 1, characterized in that the press block assembly (3) is configured such that the vertical velocity of the upper link (32) and the lower link (33) decays as the angle with the toggle lever (31) increases near the bottom end of the press stroke and a preset dwell period occurs at the dead point position.
  3. 3. The device according to claim 1, wherein the driving shaft (42) is an eccentric shaft, the transmission assembly (43) comprises an eccentric disc (431) arranged on the eccentric shaft, a contact part (311) matched with the eccentric disc (431) is arranged on one side of the toggle rod (31), the power driving mechanism (4) further comprises a driven shaft (21) and a torsion spring (9) arranged on the driven shaft (21), the driven shaft (21) is rotationally connected with the toggle rod (31), and the contact part (311) is driven by the torsion spring (9) to contact the eccentric disc (431) after pressing is completed so as to retract the toggle rod (31).
  4. 4. The device according to claim 1, wherein the transmission assembly (43) comprises a crank (432), the driving shaft (42) is divided into two sections and is respectively arranged at two sides of the crank (432), the two sections of the driving shaft (42) are provided with fixing parts, the fixing parts are hinged with the crank (432), and one end of the crank (432) away from the driving shaft (42) is hinged with the toggle rod (31) so as to drive the toggle rod (31) through reciprocating motion of the crank (432).
  5. 5. The device according to claim 1, characterized in that a knocking assembly (5) driven by a second motor (53) is arranged on one side of the bearing frame (38), the knocking assembly (5) is used for knocking the forming pipe (381), and an avoidance groove (11) is arranged on the base (1) and is used for accommodating the second motor (53) when the pressing block assembly (3) descends.
  6. 6. The device according to claim 1, wherein a telescopic assembly (6) is further arranged inside the bearing frame (38), the telescopic assembly (6) is fixedly connected with the forming tube (381) and is used for driving the forming tube (381) to switch between a pressing station and a discharging station, the forming tube (381) is of a penetrating structure, the top end surface of the bearing frame (38) serves as a bottom sealing end of the forming tube (381) in the pressing station, and the forming tube (381) is communicated with a discharging groove (382) penetrating the bearing frame (38) in the discharging station.
  7. 7. The device according to claim 6, wherein the telescopic assembly (6) comprises two phases Screw rods (61) which are arranged and are opposite in rotation direction are provided with screw blocks (62) on the screw rods (61), the screw blocks (62) are fixedly connected with the forming pipe (381) through telescopic claws (63), and the two screw rods (61) are connected with an output shaft of a third motor (65) through a belt pulley group (64) so as to realize synchronous translation of the forming pipe (381).
  8. 8. The device according to claim 1, wherein a slide rail (12) is arranged on one side of the base (1), a discharging pushing mechanism (7) is connected to the slide rail (12) in a sliding mode, the discharging pushing mechanism (7) comprises a hydraulic cylinder (71), a lifting block (72) and a pushing block (73) which are in driving connection with the hydraulic cylinder (71), the hydraulic cylinder (71) drives the lifting block (72) to vertically move, and the lifting block is converted into horizontal movement of the pushing block (73) along the slide rail (12) through a hinged fulcrum.
  9. 9. The device according to claim 8, characterized in that a signal receiver (8) is arranged on the hydraulic cylinder (71), and the signal receiver (8) is in signal connection with a control system of the first motor (41), the second motor (53) and the third motor (65) for triggering the action of the push-out block (73) according to the position state of the forming tube (381).
  10. 10. The device according to any one of claims 1 to 9, wherein the first motor (41), the second motor (53) and the third motor (65) are respectively provided with a dustproof sealing shell, and the screw (61) and the sliding rail (12) are provided with flexible protective covers for blocking reduced iron powder dust from entering the kinematic pair.

Description

Reduced iron powder briquetting device Technical Field The application belongs to the technical field of powder metallurgy machinery, and particularly relates to a reduced iron powder briquetting device. Background The iron powder briquetting is to cold-press the iron powder directly into 3-6 kg cake blocks by a metal powder briquetting machine so as to facilitate transportation and furnace charging. The metal iron powder briquetting product is mainly used as steelmaking raw material, the original material is ensured to be unchanged through briquetting, the reoxidation of the product is avoided, and the recovery loss of the charging furnace is not more than 10%. The density of the iron powder briquettes pressed by the metal iron powder briquetting machine is about 4.0-6.2 g/cm < 3 >, and the oxidation burning loss ratio of direct return smelting is close to the melting loss of iron ingots. After the metal iron powder is made into a briquette product, the surface area is greatly reduced, the heat transfer speed is very high, the loss is low, the efficiency is high, and the molten iron yield is high. Because of the unique irregular shape, the reduced iron powder shows strong mechanical biting force when being pressed into precise parts, which is beneficial to improving the green strength of the parts. However, prior art briquetting apparatus have significant drawbacks in handling such materials. First, voids are easily generated when filling the mold due to poor powder flowability, so that the density inside the compact is not uniform. In the pressing process, the friction force between the iron powder and the inner wall of the die is huge, so that the pressure is fast attenuated along the axial direction, and the top end and the bottom end of a part pressed in one direction are dense and sparse, so that the part is easy to deform or crack in the subsequent sintering process. In addition, the iron powder is extremely fine, and the dust in the pressing process not only causes material waste, but also seriously pollutes the working environment and damages the equipment precision. Therefore, designing a reduced iron powder briquetting apparatus that can achieve uniform filling, balance compaction pressure, and effectively prevent dust is an urgent problem in the art. Disclosure of Invention The application provides a reduced iron powder briquetting device which aims to solve the technical problems of uneven density and dust generation in the inside of a briquette in the pressing process. The technical scheme adopted by the application is as follows: a reduced iron powder briquetting device comprises a base, wherein a mounting frame is fixedly arranged on the base; The pressing block assembly is arranged on the mounting frame and comprises a toggle rod, an upper connecting rod and a lower connecting rod, wherein the upper connecting rod is hinged with the toggle rod, an upper connecting block is hinged at one end of the upper connecting rod, which is far away from the toggle rod, and a lower connecting block is hinged at one end of the lower connecting rod, which is far away from the toggle rod; the power driving mechanism comprises a first motor, a driving shaft driven by the first motor to rotate and a transmission assembly connected between the driving shaft and the toggle rod; Under the drive of the first motor, the transmission assembly drives the toggle rod so that the upper connecting rod and the lower connecting rod tend to be collinear, and synchronously drives the bearing frame to move upwards and the compression joint frame to move downwards, thereby realizing bidirectional compression of the reduced iron powder in the forming tube. Optionally, the briquetting assembly is configured such that the vertical velocity of the upper and lower links decays as the angle with the toggle links increases near the bottom end of the pressing stroke and produces a preset dwell period at the dead point position. The driving shaft is an eccentric shaft, the transmission assembly comprises an eccentric disc arranged on the eccentric shaft, one side of the toggle rod is provided with a contact part matched with the eccentric disc, the power driving mechanism further comprises a driven shaft and a torsion spring arranged on the driven shaft, the driven shaft is rotationally connected with the toggle rod, and the contact part is driven by the torsion spring to contact the eccentric disc after the pressing is completed so as to retract the toggle rod. Optionally, the transmission assembly comprises a crank, the driving shaft is divided into two sections and is respectively arranged at two sides of the crank, the two sections of driving shafts are respectively provided with a fixing part, the fixing parts are hinged with the crank, and one end of the crank, which is away from the driving shaft, is hinged with the toggle rod so as to drive the toggle rod through reciprocating motion of the crank. Optionally, a knocking compo