CN-122007260-A - Auxiliary mold separating equipment for automobile covering part

CN122007260ACN 122007260 ACN122007260 ACN 122007260ACN-122007260-A

Abstract

The application discloses auxiliary mold separation equipment for automobile covering parts, which relates to the technical field of mold separation of automobile molds and comprises a supporting cylinder body, a jacking guide post and an execution unit, wherein the supporting cylinder body is arranged in a lower mold seat, the jacking guide post is slidably and hermetically connected in the supporting cylinder body, the execution unit is connected with a liquid channel of the supporting cylinder body, an elastic sleeve capable of radially contracting or expanding is arranged on a sealing sleeve at the periphery of the jacking guide post so as to form an expansion cavity between the jacking guide post and the elastic sleeve, an expansion runner is arranged in the jacking guide post in a penetrating manner and is used for communicating a lower cavity space of the supporting cylinder body with the expansion cavity, the execution unit is configured to receive fluid discharged by the supporting cylinder body and establish back pressure so as to generate damping force for buffering mold closing impact, and meanwhile, the elastic sleeve is driven to radially expand to lock and guide through the expansion runner, and stored pressure fluid is released to the lower cavity of the supporting cylinder body in the mold separation stage, and the pressure fluid in the expansion cavity is discharged and then the jacking guide post is driven to lift up the upper mold seat. The application has the effect of improving the die separation efficiency.

Inventors

DING WENPING
XIA MINGLEI
HUANG WEI
GAO FEI
Yang Shanfeng
CHEN XIN
ZHANG KAIGUO
QU HUI
LI DONG
CHEN LEI

Assignees

湖北十堰先锋模具股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (9)

1. The auxiliary die-dividing equipment for the automobile panel is characterized by comprising a supporting cylinder body (3) arranged on a lower die holder (2), a jacking guide post (4) which is slidably and hermetically connected in the supporting cylinder body (3), and an execution unit (5) which is in liquid path connection with the supporting cylinder body (3); the jacking guide post (4) is used for guiding in a matched manner with a guide sleeve (13) of the upper die holder (1); an elastic sleeve (42) capable of radially contracting or expanding is coaxially sleeved on the periphery of the jacking guide post (4) so as to form an expansion cavity between the jacking guide post (4) and the elastic sleeve (42), and an expansion runner (45) is penetrated and arranged in the jacking guide post (4) and used for communicating the lower cavity space of the supporting cylinder body (3) with the expansion cavity; The execution unit (5) is configured to receive fluid discharged from the support cylinder (3) and establish back pressure to generate damping force for buffering die closing impact in a die closing stage, meanwhile, the elastic sleeve (42) is driven to radially expand through the expansion runner (45) to lock and guide, and in a die separating stage, stored pressure fluid is released to the lower cavity of the support cylinder (3), and the jacking guide pillar (4) is driven to jack the upper die holder (1) after the pressure fluid in the expansion cavity is discharged.
2. The auxiliary mold separation device for the automobile panel according to claim 1, wherein the elastic sleeve (42) is made of elastic metal and is an annular thin-wall member, a plurality of non-penetrating expansion grooves (421) are formed in the outer wall surface of the elastic sleeve (42) at intervals along the axial direction, the depth of each expansion groove (421) is smaller than the wall thickness of the elastic sleeve (42) so that the inner wall of the elastic sleeve (42) is kept completely sealed, an annular mounting groove (43) is formed in the outer wall surface of the jacking guide post (4), and the elastic sleeve (42) is correspondingly sealed and coated on the periphery of the mounting groove (43) of the jacking guide post (4) so that the expansion cavity is sealed.
3. Auxiliary mould-dividing device for automotive panels according to claim 1, characterized in that said execution unit (5) comprises an accumulator (51) and a hydraulic control module connecting said support cylinder (3) with the accumulator (51) through a hydraulic circuit; The hydraulic control module comprises a damping branch (52) and an energy supply branch (53) which are arranged in parallel, the damping branch (52) is configured to only allow pressure fluid to flow from the support cylinder (3) to the accumulator (51) and is provided with a throttling element to generate back pressure, and the energy supply branch (53) is configured to only allow pressure fluid to flow from the accumulator (51) to the main cylinder and the throughflow capacity is larger than that of the damping branch (52).
4. The auxiliary die-cutting device for automobile panels according to claim 3, wherein the hydraulic control module further comprises an overflow branch (54), one end of the overflow branch (54) is connected with the damping branch (52) and/or the energy supply branch (53), the other end of the overflow branch is used for externally connecting an oil tank, and when the internal pressure of the damping branch (52) or the energy supply branch (53) exceeds a preset safety threshold value, the overflow branch (54) is opened for unloading.
5. The auxiliary die-dividing apparatus for automobile panels according to claim 3, wherein the executing unit (5) further comprises a flow direction control module provided at an opening position for hydraulic fluid to enter and exit from the bottom of the supporting cylinder (3), the flow direction control module being configured to communicate the lower chamber of the supporting cylinder (3) with the expansion chamber by using a pressure difference to perform liquid-filling expansion when the hydraulic fluid exits the supporting cylinder (3) in a die-closing stage, and to shut off a passage between the lower chamber of the supporting cylinder (3) and the expansion chamber by using the pressure difference when the hydraulic fluid flows into the supporting cylinder (3) in a die-dividing stage, and to perform liquid-discharging unloading of the high-pressure fluid in the expansion chamber.
6. The auxiliary die-splitting device for the automobile panel according to claim 5, wherein the flow direction control module comprises a flow direction control valve (55), a main flow channel is arranged in the flow direction control valve (55) and used for communicating the lower cavity of the supporting cylinder body (3) with the damping branch (52) or the energy supply branch (53), a throttling area is arranged in the main flow channel, a logic valve core controlled by the pressure difference at two ends of the throttling area is also arranged in the flow direction control valve (55), and the logic valve core is provided with a liquid filling position and a liquid draining position; When hydraulic fluid flows out of the supporting cylinder body (3), the back pressure generated in the throttling area in the main flow passage drives the logic valve core to move to a liquid filling position, the expansion cavity is communicated with the lower cavity of the supporting cylinder body (3), and when the hydraulic fluid flows into the supporting cylinder body (3), the pressure drop generated in the throttling area in the main flow passage drives the logic valve core to switch to a draining position, and the expansion cavity is disconnected from the lower cavity of the supporting cylinder body (3) and communicated with an external oil tank.
7. The auxiliary mold separation device for the automobile panel according to claim 1, wherein the bottom position of the inner wall of the supporting cylinder body (3) is hinged with a locking claw (32), the bottom position of the outer wall of the jacking guide column (4) is provided with a locking groove (46), and when the jacking guide column (4) is clamped down to the locking position, the locking claw (32) is correspondingly clamped into the locking groove (46) so as to limit the jacking guide column (4) to rebound upwards.
8. The auxiliary die-separating device for automobile panels according to claim 7, wherein the side wall of the supporting cylinder body (3) is penetrated and is connected with an unlocking piece (33) in a sealing way, one end of the unlocking piece (33) is connected with the upper die holder (1), the other end of the unlocking piece is connected with the locking claw (32), and the unlocking key is configured to pull the locking claw (32) to be separated from the locking groove (46) when the upper die holder (1) returns upwards to reach a preset travel threshold value.
9. The auxiliary die-separating device for the automobile panel according to claim 1, wherein the top of the jacking guide post (4) is hinged with a floating contact (41), and a buffer cushion is embedded on the upper surface of the floating contact (41).

Description

Auxiliary mold separating equipment for automobile covering part Technical Field The application relates to the technical field of automobile mold parting, in particular to auxiliary mold parting equipment for automobile covering parts. Background The automobile covering part is a sheet metal stamping part for forming the space shape of an automobile body and a cab, mainly comprises an automobile bottom plate, an engine cover, an automobile door outer plate, an automobile top cover, a side wall outer plate and the like, and has the important functions of sealing the automobile body, protecting internal engine and chassis parts and absorbing energy during collision to protect the safety of passengers, and generally has the characteristics of large size, complex molded surface, multiple curvature changes, high surface quality requirement and the like. At present, the production of automobile panel mainly relies on large-scale cold stamping die to carry out batch production on mechanical press or hydraulic press, and conventional cold stamping process can firstly place the sheet metal on the bed die, then the press drives the upper die to descend at a high speed and to die with the bed die, and in this process, the guide pillar in the mould contacts with the guide pin bushing first and guides the upper die and the bed die to accurately center, and the mould carries out operations such as drawing, deburring, punching or plastic on the sheet metal, and after the shaping is finished, the press drives the upper die to ascend, and the upper die is separated from the bed die and then takes out the finished product. In the mold closing and forming stage, especially at the moment that the upper mold contacts the plate, huge vertical impact force and lateral thrust are generated, in order to resist the lateral force and prevent the die dislocation from causing edge cutting edge collapse or forming surface strain, theoretically, the smaller and better the fit clearance between the guide post and the guide sleeve is required, in the mold parting stage, because the die surfaces are tightly closed, the huge vacuum adsorption force and oil film tension are formed between the upper mold and the lower mold, the huge adsorption force often causes micro elastic deformation or inclination when the upper mold moves upwards, at the moment, the fit clearance between the guide post and the guide sleeve is too small, the micro inclination of the upper mold can cause the guide post and the guide sleeve to interfere, the phenomenon of seizure or strain is generated, and the processing process is seriously influenced. Disclosure of Invention In order to improve the technical problems, the application provides auxiliary mold separating equipment for an automobile panel. The application provides auxiliary mold separation equipment for an automobile panel, which adopts the following technical scheme: An auxiliary die-separating device for an automobile panel comprises a supporting cylinder body arranged on a lower die holder, a jacking guide column which slides and is connected in the supporting cylinder body in a sealing manner, and an execution unit connected with a liquid path of the supporting cylinder body; the jacking guide post is used for guiding with the guide sleeve of the upper die holder in a matched manner; The periphery of the jacking guide post is sealed, and an elastic sleeve capable of radially contracting or expanding is coaxially sleeved on the jacking guide post, so that an expansion cavity is formed between the jacking guide post and the elastic sleeve, and an expansion runner is penetrated and arranged in the jacking guide post and used for communicating the lower cavity space of the supporting cylinder body with the expansion cavity; The execution unit is configured to receive fluid discharged from the support cylinder and establish back pressure to generate damping force for buffering die closing impact in a die closing stage, and drive the elastic sleeve to radially expand through the expansion runner to lock and guide, release stored pressure fluid to the lower cavity of the support cylinder in a die separating stage, discharge pressure fluid in the expansion cavity and drive the lifting guide post to lift the upper die holder. Optionally, the elastic sleeve is made of elastic metal material and is an annular thin-wall member, a plurality of non-through expansion grooves are axially arranged on the outer wall surface of the elastic sleeve at intervals, the depth of each expansion groove is smaller than the wall thickness of the elastic sleeve, so that the inner wall of the elastic sleeve is kept completely sealed, an annular mounting groove is formed on the outer wall surface of the jacking guide post, and the elastic sleeve is correspondingly sealed and coated on the periphery of the mounting groove of the jacking guide post, so that the expansion cavity is sealed. Optionally, the execution unit comprises an accu