Search

CN-122007384-A - Demolding device and method for aluminum alloy casting

CN122007384ACN 122007384 ACN122007384 ACN 122007384ACN-122007384-A

Abstract

The invention relates to the technical field of section casting, and discloses a demolding device and method for an aluminum alloy casting, wherein the demolding device comprises the following steps: the invention relates to a heat exchanger, which comprises a base, wherein a first bracket, a second bracket and a third bracket are fixedly arranged on the base, a rotating plate is rotatably arranged on the base, a rotary motor is fixedly arranged on the first bracket, a rotary column is fixedly arranged on an output shaft of the rotary motor, the heat exchanger is started firstly to drive cooling water to form closed loop circulation through a water inlet pipe and an annular pipe, the adhesive force between an aluminum alloy bar and a cylinder mold cavity is weakened by means of thermal expansion and cold contraction, the knocking component is started again to drive the knocking plate to periodically rebound to collide with the outer wall of the cylinder, the residual adhesion between the bar and the die cavity is broken through high-frequency vibration, the demolding mode of forced pushing of the traditional ejector rod is avoided, demolding stress is soft and distributed uniformly, the problems of bar demolding deflection, clamping stagnation and surface scraping abrasion are solved from the root, and the yield and the surface quality of finished products of aluminum alloy cast bars are greatly improved.

Inventors

  • HONG YADONG
  • ZHANG SHIYONG
  • ZHANG YE

Assignees

  • 江苏杰联机械有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (8)

  1. 1. An aluminum alloy casting stripping apparatus, comprising: The rotary support comprises a base (1), wherein a first support (101), a second support (102) and a third support (103) are fixedly installed on the base (1), a rotating plate (19) is rotatably installed on the base (1), a rotary motor (2) is fixedly installed on the first support (101), a rotary column (3) is fixedly installed on an output shaft of the rotary motor (2), the rotary motor (2) is used for driving the rotary column (3) to turn over one hundred eighty degrees, a cylinder (4) is sleeved on the outer circle surface at the top end of the rotary column (3), the rotary column (3) is fixedly connected with the cylinder (4), a push rod (5) is slidably installed in the rotary column (3), and the push rod (5) is driven by a first driving source to lift; Lifting frame (6), lifting frame (6) slidable mounting is on second support (102), lifting frame (6) are gone up and down by second actuating source drive, fixed mounting has a plurality of rings (7) on lifting frame (6), and a plurality of rings (7) are laid along vertical direction equidistant, every equal fixed mounting in ring (7) below has an annular pipe (8), lifting frame (6) bottom fixed mounting has heat exchanger (11), the intercommunication has inlet tube (9) and drain pipe (10) on heat exchanger (11), the both ends of annular pipe (8) are respectively with inlet tube (9) and drain pipe (10) intercommunication, every ring (7) top all is provided with and beats the subassembly, and when one hundred eighty degrees of cylinder (4) open end down of messenger of rotatory post (3), cylinder (4) are located ring (7) top, and cylinder (4) coaxial with ring (7), and second actuating source drive lifting frame (6) rise ring (7) and make ring (7) and cylinder (4) are used for beating the face (4) and are cup jointed in outer disc (4) and outer disc.
  2. 2. An aluminium alloy casting stripping apparatus according to claim 1, characterized in that the two ends of each annular tube (8) are provided with electromagnetic valves (12), the inner ring of each annular tube (8) is formed by an elastic membrane (801), and when half of the electromagnetic valves (12) on the annular tubes (8) are closed, the other half of the flow in the annular tubes (8) is increased, so that the elastic membrane (801) expands, and the elastic membrane (801) is attached to the outer circular surface of the cylinder (4).
  3. 3. The aluminum alloy casting demolding device according to claim 1, wherein each knocking assembly comprises a gear ring (13), a knocking plate (14), a lug (16), a gear (17) and a servo motor (18), the gear ring (13) is rotatably mounted on the circular ring (7), the knocking plates (14) are rotatably mounted on the circular ring (7), the knocking plate (14) is connected with the circular ring (7) through a torsion spring (15), the pretightening force of the torsion spring (15) enables one end of the knocking plate (14) to rotate towards the outer circular surface of the cylinder (4), the lugs (16) are fixedly mounted on the inner wall of the gear ring (13), the lugs (16) are in sliding fit with the other end of the knocking plate (14), the gear (17) is rotatably mounted on the circular ring (7), the gear (17) is meshed with the gear ring (13), and the gear (17) is driven to rotate by the servo motor (18) fixedly mounted on the circular ring (7), and when the gear ring (13) rotates, the lugs (16) are in sliding fit with the torsion spring (14) to overcome the pretightening force of the outer circular ring (14).
  4. 4. The aluminum alloy casting demolding device according to claim 1, wherein the rotating plate (19) is driven to rotate by a third driving source, a fixed column (20) is fixedly installed at one end of the rotating plate (19), a lifting rod (22) is slidably installed in the fixed column (20), the lifting rod (22) is driven to lift by a fourth driving source arranged in the fixed column (20), a rotating disc (21) is arranged at the top end of the lifting rod (22), an outer annular cotton (25) is fixedly installed at the top of the rotating disc (21), a transfusion tube (26) is fixedly installed on the third support (103), the transfusion tube (26) is communicated with an external liquid supply device, the fixed column (20) is located below the third support (103) in an initial state of the rotating plate (19), the transfusion tube (26) faces the outer annular cotton (25), after the lifting rod (6) is lifted, the third driving source drives the rotating plate (19) to enable the lifting rod (20) to be located below the outer annular cotton (25), and the inner wall of the lifting cylinder (4) is matched with the outer annular cotton (25) in a sliding mode.
  5. 5. An aluminum alloy casting stripping device according to claim 4, characterized in that an inner annular cotton (24) is fixedly arranged at the top of the rotating disc (21), the inner annular cotton (24) is positioned in an outer annular cotton (25), the inner wall of the inner annular cotton (24) is in sliding fit with the outer round surface of the ejector rod (5), the number of the two infusion tubes (26) is two, one infusion tube (26) is used for conveying a stripping agent to the outer annular cotton (25), and the other infusion tube (26) is used for conveying lubricating oil to the inner annular cotton (24).
  6. 6. An aluminium alloy casting stripper according to claim 5, characterized in that the top of the rotating disc (21) is fixedly provided with an annular plate (23), the annular plate (23) being located between an inner annular cotton (24) and an outer annular cotton (25).
  7. 7. The aluminum alloy casting stripping device according to claim 6, wherein the rotating disc (21) is rotatably mounted at the top end of the lifting rod (22), the rotating wheel (27) is rotatably mounted on the third support (103), the rotating wheel (27) is driven to rotate by a stepping motor (28) fixedly mounted on the third support (103), and in an initial state, the outer circular surface of the rotating disc (21) is abutted against the outer circular surface of the rotating wheel (27).
  8. 8. A method for demolding an aluminum alloy cast, characterized in that the method is applied to an aluminum alloy cast demolding apparatus as recited in any one of claims 1 to 7, the method comprising the steps of: The method comprises the steps of S1, injecting molten aluminum alloy into a cylinder (4), cooling and solidifying to form an aluminum alloy bar, wherein the device is in an initial state, a rotary motor (2) is stopped, a rotary column (3) is vertically arranged, an opening of the cylinder (4) faces upwards, a push rod (5) is accommodated at the bottom end of the rotary column (3), a lifting frame (6) is positioned at a low position of a second bracket (102), a circular ring (7), a circular pipe (8) and the cylinder (4) are separated in a staggered mode, and a knocking assembly and a heat exchanger (11) are in a standby state; Step S2, starting a rotary motor (2) to drive a rotary column (3) to turn over for one hundred and eighty degrees, driving a cylinder (4) to synchronously rotate until an opening is vertically downward, and enabling the cylinder (4), a circular ring (7) and a circular pipe (8) to be coaxially distributed to finish demoulding station switching; Step S3, starting a second driving source to drive the lifting frame (6) to ascend, sleeving the circular ring (7) outside the cylinder (4), keeping gaps between the circular ring (7), the annular pipe (8) and the outer wall of the cylinder (4), starting the heat exchanger (11), enabling cooling water to flow into the annular pipe (8) through the water inlet pipe (9), absorbing the waste heat of the bar and the cylinder (4), and then refluxing the bar through the water outlet pipe (10), weakening the adhesive force between the bar and the inner wall of the cylinder (4) through a thermal expansion and contraction principle, and reducing demoulding resistance; S4, after cooling is finished, starting a knocking assembly at the top of the circular ring (7), uniformly and intermittently knocking the outer wall of the cylinder (4), and scattering the adhesion structure of the bar and the cylinder (4) through vibration to realize flexible loosening of the bar, so that component damage and bar defect caused by hard pushing are avoided; and S5, after the bar is loosened, starting the first driving source to drive the ejector rod (5) to move, pushing the bar to be separated from the cylinder (4) and finishing discharging.

Description

Demolding device and method for aluminum alloy casting Technical Field The invention relates to the technical field of profile casting, in particular to a demolding device and method for an aluminum alloy casting. Background Generally, the demolding device is an indispensable key device in the aluminum alloy bar casting production flow, the core working procedure of aluminum alloy bar casting mainly comprises the steps of accurately injecting molten aluminum alloy metal liquid into a special mold cavity, and after the metal liquid is fully cooled and solidified in the mold cavity to form a regular bar, smoothly taking out the formed bar from the mold cavity by means of the demolding device, so that single-round casting operation is completed, and orderly pushing of subsequent bar processing and production circulation is ensured. The existing demolding technology adopts a mode that the ejector rod is forced to push the solidified bar to move out of the die cavity, and in the solidification process of the molten aluminum alloy in the die cavity, the outer wall of the bar and the inner wall of the die cavity form certain attaching adhesive force, when the ejector rod is forced to push, the stress distribution is extremely uneven, deflection and clamping stagnation can be caused when the bar is demolded, smooth demolding can not be realized, scraping abrasion of the bar and the inner wall of the die cavity can be aggravated, the surface quality of the bar is further deteriorated, on the other hand, the ejector rod is forced to push the bar to demold for a long time, the counterforce can continuously act on the inner wall of the die cavity and the ejector rod mounting base, long-time repeated high-strength stress impact can cause deformation and crack of the inner wall of the die cavity, the regular structure of the die cavity is damaged, bending, abrasion and even breakage can be caused by the ejector rod, frequent replacement of the ejector rod and maintenance die are required, normal production progress is delayed, cost investment for die maintenance and part replacement can be greatly increased, and overall operation benefit of a casting production line is reduced. Disclosure of Invention The invention aims to provide a demolding device and method for an aluminum alloy casting piece, aiming at the defects of the prior art, so as to solve the technical problems in the prior art. The aim of the invention can be achieved by the following technical scheme: An aluminum alloy casting stripping apparatus comprising: The rotary column lifting device comprises a base, wherein a first support, a second support and a third support are fixedly arranged on the base, a rotary plate is rotatably arranged on the base, a rotary motor is fixedly arranged on the first support, a rotary column is fixedly arranged on an output shaft of the rotary motor, the rotary motor is used for driving the rotary column to turn over by one hundred eighty degrees, a cylinder is sleeved on the outer circular surface of the top end of the rotary column, the rotary column is fixedly connected with the cylinder, a push rod is slidably arranged in the rotary column, and the push rod is driven by a first driving source to lift; The crane, crane slidable mounting is on the second support, the crane is gone up and down by the drive of second actuating source, fixed mounting has a plurality of rings on the crane, and a plurality of rings are laid along vertical direction equidistant, every equal fixed mounting in ring below has an annular pipe, crane bottom fixed mounting has the heat exchanger, the intercommunication has inlet tube and drain pipe on the heat exchanger, the both ends of annular pipe communicate with inlet tube and drain pipe respectively, every the ring top all is provided with and beats the subassembly, and when the spliced pole upset one hundred eighty degrees makes the open end of drum down, the drum is located the ring top, and the drum is coaxial to be laid with the ring, and the second actuating source drive crane rises this moment and makes the ring cup joint in the drum outer disc, and ring and annular pipe all have the clearance with the drum outer disc, and the subassembly is used for beating the drum outer disc this moment. As a further scheme of the invention, the two ends of each annular pipe are provided with electromagnetic valves, the inner ring of each annular pipe is composed of elastic films, when half of electromagnetic valves on the annular pipes are closed, the other half of the annular pipes are increased in flow, so that the elastic films expand, and the elastic films are attached to the outer circular surface of the cylinder. As a further scheme of the invention, each knocking component comprises a gear ring, a knocking plate, a lug, a gear and a servo motor, wherein the gear ring is rotatably arranged on the circular ring, the knocking plates distributed on a plurality of circumferences are rotatably arranged