CN114713787A

CN114713787A - Die-casting die and die-casting process for local thin-wall part of automobile part

Info

Publication number: CN114713787A
Application number: CN202210221646.7A
Authority: CN
Inventors: 杉本润
Original assignee: Meinuo Precision Auto Parts Nantong Co ltd
Current assignee: Meinuo Precision Auto Parts Nantong Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-07-08
Anticipated expiration: 2042-03-09
Also published as: CN114713787B

Abstract

The invention discloses a die-casting die and a die-casting process for a local thin-wall part of an automobile part, and the die-casting die comprises an upper die holder and a lower die holder, wherein the top of the lower die holder is provided with a die-casting system, the die-casting system respectively comprises an upper die, a thin-wall template, a pouring sleeve, a clamping plate, a guide groove, a hydraulic cylinder, a static template and a clamping seat, the static template is positioned at the top of the lower die holder, the clamping seat is fixedly connected to two sides of the top of the inner side of the lower die holder, and the hydraulic cylinder is arranged on two sides of the top of the inner part of the upper die holder; according to the invention, through the structural cooperation of the die-casting system, the upper die holder and the lower die holder are urged to be matched to obtain the sealing and positioning effects of the clamping plate and the clamping seat, at the moment, a die-casting cavity formed by the upper die, the thin-wall template and the static template is utilized, so that a solution can be uniformly filled in the cavity to be cast into a thin-wall die-casting workpiece, and the structure of the local jacking mechanism is used for jacking, so that the inner side of the static template is urged to obtain the movable template capable of lifting, and the local extrusion effect is obtained between the thin-wall template and the movable template.

Description

Die-casting die and die-casting process for local thin-wall part of automobile part

Technical Field

The invention relates to the technical field of die casting, in particular to a die casting die and a die casting process for a local thin-wall part of an automobile part.

Background

The die casting is a precise casting method which forces molten metal into a metal die with a complex shape by high pressure, a die casting piece manufactured by die casting has higher mechanical strength than a casting piece obtained by ordinary casting, in the field of automobile production, most parts of an automobile are processed by a die casting forming technology, and during processing, the die casting is carried out under the condition of die closing contact by using a die with a corresponding type, so that a casting piece of an automobile part is obtained.

When the existing automobile parts are subjected to die casting, the wall thickness of a casting is difficult to detect and adjust, when die castings with different thicknesses are needed, an adaptive die needs to be replaced again, the die castings are often placed in a die groove after being formed and are difficult to take out, the working flow and inconvenience of operators are increased, when the thin-wall die castings are subjected to single die casting, the thickness of surface die casting can generate flaws due to uneven stress, so that the plasticity and the mechanical strength of the local thin wall of the die casting are unreliable, but the consumption of driving force is increased through continuous reciprocating die casting, the local extrusion effect of the casting is not ideal, and the production precision and the hardness of the thin-wall die casting are reduced.

Disclosure of Invention

The invention aims to provide a die-casting die and a die-casting process for a local thin-wall part of an automobile part, so as to solve the related problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the die-casting die comprises an upper die base and a lower die base, wherein the top of the lower die base is provided with a die-casting system, the die-casting system comprises an upper die, a thin-wall template, a pouring sleeve, clamping plates, guide grooves, hydraulic cylinders, static templates and clamping seats respectively, the static templates are located at the top of the lower die base, the clamping seats are fixedly connected to the two sides of the top of the inner side of the lower die base, the hydraulic cylinders are arranged on the two sides of the top of the inner portion of the upper die base, the output ends of the hydraulic cylinders are provided with the upper die, the guide grooves are arranged on the two sides of the inner portion of the upper die base, the clamping plates matched with the clamping seats in a clamping mode are fixedly connected to the bottoms of the guide grooves, the thin-wall template is arranged on one side of the bottom of the upper die base, the pouring sleeve is sleeved at the middle position of the inner portion of the upper die base, and the pouring sleeve extends to the inside of the upper die and the thin-wall template.

Preferably, one side of the inside bottom of die holder is equipped with local roof pressure mechanism, and local roof pressure mechanism includes trapezoidal cardboard, mounting groove, gear train, servo motor, movable mould board, lead screw and internal thread pipe respectively, the mounting groove rigid coupling is in one side of the inside bottom of die holder, the inside top of mounting groove is equipped with servo motor, the both sides cover of the inside bottom of mounting groove is equipped with the lead screw, and is two sets of the outside cover of lead screw is equipped with the internal thread pipe of screw thread adaptation, and is two sets of the top rigid coupling of internal thread pipe has trapezoidal cardboard and movable mould board, servo motor's the output and the bottom in the two sets of lead screw outsides are equipped with the gear train.

Preferably, one side at quiet template top is equipped with guide detecting system, and guide detecting system includes position sleeve, guide loop bar, displacement sensor and fixed pipe respectively, fixed pipe rigid coupling in one side at quiet template top, the inside bottom of fixed pipe is equipped with displacement sensor, go up inside one side cover of mould and be equipped with position sleeve, the inside top of position sleeve is equipped with guide loop bar.

Preferably, positioning seats are arranged on two sides of the upper die base, an insertion rod is arranged at the bottom of each positioning seat, and insertion sleeves matched with the insertion rods in an insertion mode are arranged on two sides of the lower die base.

Preferably, one side of the lower die holder is provided with a control console, the top of the lower die holder is provided with a concave cavity, and the concave cavity is matched with the upper die and the thin-wall template.

Preferably, the thin-wall template, the positioning sleeve and the guide sleeve rod are in the same horizontal plane, the two groups of guide grooves are formed by combining a sliding groove and a sliding block respectively, the tops of two sides of the upper die are fixedly connected with the sliding block, one side of the top of the static template is provided with a trapezoidal groove, and the trapezoidal groove is matched with the trapezoidal clamping plate in a clamping mode.

Preferably, the two sides inside the mounting groove are provided with guide grooves, the inner sides of the guide grooves are provided with guide blocks fixedly connected with the internal thread pipes, and the movable template and the static template are on the same horizontal plane.

Preferably, the gear train is formed by gear and fluted disc and bull stick combination respectively, servo motor's output is equipped with the fluted disc, the both sides cover of the inside bottom of mounting groove is equipped with the bull stick, and the outside of bull stick and lead screw is equipped with intermeshing's gear.

Preferably, the inner side of the positioning sleeve is in sliding fit with the outer side of the fixed pipe, and the guide sleeve rod extends into the fixed pipe and is opposite to the vertical surface of the displacement sensor.

A die casting process of a die casting die for a local thin-wall part of an automobile part comprises the following steps:

step one; firstly, an upper die base and a lower die base are mutually matched to promote a die-casting cavity to be formed between the thin-wall template and the static template, and at the moment, metal solution can be led into the cavity from a pouring sleeve and a thin-wall workpiece is formed under the die-casting of the thin-wall template;

step two; when a workpiece is die-cast and formed, the trapezoidal clamping plate and the movable template are driven to slowly rise through the structural cooperation of the local jacking mechanism, and then thin-walled parts sandwiched between the thin-walled template and the vertical surface of the movable template can be secondarily extruded, so that the local part of the thin-walled part is die-cast;

step three; after the thin-wall part is die-cast, the upper die base and the lower die base can be separated, and the trapezoidal clamping plate and the movable die plate are continuously started through the structure of the local jacking mechanism to drive the die-cast thin-wall part to be lifted, so that the lifted thin-wall part is taken out.

Compared with the prior art, the invention provides a die-casting die for a local thin-wall part of an automobile part, which has the following beneficial effects:

1. according to the invention, through the structural matching of the die-casting system, the sealing and positioning effects of the clamping plate and the clamping seat are obtained after the die-casting of the upper die seat and the lower die seat are combined, at the moment, a die-casting cavity formed by the upper die, the thin-wall template and the static template can be used for uniformly filling a solution in the cavity to cast a thin-wall die-casting workpiece, and the structure of the local jacking mechanism is used for jacking, so that the inner side of the static template is promoted to obtain a movable template capable of moving up and down, and thus, the local extrusion effect is obtained between the thin-wall template and the movable template, further, the local thin wall of the die-casting workpiece is subjected to secondary pressing, and the controllability of the extrusion of the movable template can be stably ensured along with the torque force formed by the meshing of the gear sets, the continuous reciprocating extrusion die-casting device is omitted, and the plasticity and the mechanical strength of the die-casting workpiece are effectively enhanced.

2. The invention utilizes the structural cooperation of a guide detection system to conveniently measure the thin-wall thickness for shaping the thin-wall template, thereby intelligently detecting the wall thickness value of each casting, ensuring the production precision and quality of the thin-wall part, increasing the intelligence of the device, and quickly adjusting the thin-wall part to the required wall thickness by the integral lifting and descending movement of the hydraulic cylinder and the upper die, without frequently dismounting and replacing the die, improving the die casting efficiency of the thin-wall part, reducing the supply requirements of the number and the cost of the die, in addition, the thin-wall part after die casting can be automatically lifted by utilizing the lifting system of the local jacking mechanism, being convenient for a worker to take out the thin-wall part, and increasing the use flexibility of the device.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the upper die base of the present invention;

FIG. 3 is a cross-sectional view of the lower die holder of the present invention;

FIG. 4 is a perspective view of the moving platen of the present invention;

FIG. 5 is a perspective view of the card and card holder of the present invention;

fig. 6 is a perspective view of a positioning sleeve of the present invention.

In the figure: 1. an upper die holder; 2. a lower die holder; 3. a local top pressing mechanism; 31. a trapezoidal snap gauge; 32. mounting grooves; 33. a gear set; 34. a servo motor; 35. moving the template; 36. a screw rod; 37. an internally threaded tube; 4. a die casting system; 41. an upper die; 42. a thin-wall template; 43. pouring a sleeve; 44. clamping a plate; 45. a guide groove; 46. a hydraulic cylinder; 47. a static template; 48. a card holder; 5. a guidance detection system; 51. a positioning sleeve; 52. a guide loop bar; 53. a displacement sensor; 54. and fixing the tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a local thin wall spare die casting die of automobile parts, includes upper die base 1 and die holder 2, its characterized in that: the top of die holder 2 is equipped with die-casting system 4, and die-casting system 4 includes mould 41 respectively, thin wall template 42, pour cover 43, cardboard 44, the guide way 45, hydraulic cylinder 46, quiet template 47 and cassette 48, quiet template 47 is located the top of die holder 2, the both sides rigid coupling at the inboard top of die holder 2 has cassette 48, the both sides at the inside top of upper die base 1 are equipped with hydraulic cylinder 46, the output of two sets of hydraulic cylinder 46 is equipped with mould 41, the inside both sides of upper die base 1 are equipped with guide way 45, the bottom rigid coupling of two sets of guide ways 45 has cardboard 44 with cassette 48 block adaptation, one side of upper die 41 bottom is equipped with thin wall template 42, the inside intermediate position department cover of upper die base 1 is equipped with pours cover 43, and pour cover 43 and extend to inside mould 41 and thin wall template 42.

As a preferable embodiment of the present embodiment: one side of the inside bottom of die holder 2 is equipped with local roof pressure mechanism 3, and local roof pressure mechanism 3 includes trapezoidal cardboard 31 respectively, mounting groove 32, gear train 33, servo motor 34, movable mould board 35, lead screw 36 and internal thread pipe 37, mounting groove 32 rigid coupling is in one side of the inside bottom of die holder 2, the inside top of mounting groove 32 is equipped with servo motor 34, the both sides cover of the inside bottom of mounting groove 32 is equipped with lead screw 36, the outside cover of two sets of lead screw 36 is equipped with the internal thread pipe 37 of screw adaptation, the top rigid coupling of two sets of internal thread pipe 37 has trapezoidal cardboard 31 and movable mould board 35, servo motor 34's the output and the bottom in the 36 outsides of two sets of lead screw are equipped with gear train 33.

As a preferable embodiment of the present embodiment: one side at quiet template 47 top is equipped with guide detecting system 5, and guide detecting system 5 includes location sleeve 51, guide loop bar 52, displacement sensor 53 and fixed pipe 54 respectively, and fixed pipe 54 rigid coupling is in the one side at quiet template 47 top, and the inside bottom of fixed pipe 54 is equipped with displacement sensor 53, goes up the inside one side cover of mould 41 and is equipped with location sleeve 51, and the inside top of location sleeve 51 is equipped with guide loop bar 52.

As a preferable embodiment of the present embodiment: the both sides of upper die base 1 are equipped with the positioning seat, and the bottom of positioning seat is equipped with the inserted bar, and the both sides of die holder 2 are equipped with the plug bush of inserting the adaptation with the inserted bar, increase upper die base 1 and die holder 2 and close guidance quality and the stability of membrane.

As a preferable embodiment of the present embodiment: one side of the lower die holder 2 is provided with a control console, the top of the lower die holder 2 is provided with a sunken cavity, and the sunken cavity is matched with the upper die 41 and the thin-wall template 42, so that the die casting can be carried out under a sealed system of the sunken cavity.

As a preferable embodiment of the present embodiment: the thin-wall template 42, the positioning sleeve 51 and the guide sleeve rod 52 are in the same horizontal plane, the two groups of guide grooves 45 are respectively formed by combining a sliding groove and a sliding block, the tops of the two sides of the upper die 41 are fixedly connected with the sliding blocks, one side of the top of the fixed template 47 is provided with a trapezoidal groove, and the trapezoidal groove is matched with the trapezoidal clamping plate 31 in a clamping manner, so that the movable template 35 and the fixed template 47 are kept in the same sealing horizontal plane under the embedded clamping manner of the trapezoidal clamping plate 31 and the trapezoidal groove.

As a preferable embodiment of the present embodiment: the two sides of the interior of the mounting groove 32 are provided with guide grooves, the inner sides of the guide grooves are provided with guide blocks fixedly connected with the internal threaded pipes 37, the movable die plate 35 and the static die plate 47 are on the same horizontal plane, and the movable die plate 35 and the static die plate 47 can be clamped on the horizontal plane to form a finished lower die, so that a thin-walled part is formed during die casting of a first die, and the lifting movement of the movable die plate 35 can be independently utilized for secondary extrusion.

As a preferable aspect of the present embodiment: the gear set 33 is composed of gears, a fluted disc and a rotating rod, the fluted disc is arranged at the output end of the servo motor 34, the rotating rods are sleeved on two sides of the bottom inside the mounting groove 32, and the mutually meshed gears are arranged on the outer sides of the rotating rods and the screw rod 36, so that the movable template 35 can be more slowly and stably lifted by utilizing the direct meshing structure of a plurality of groups of gears and the fluted disc, and the extrusion effect of the structure on thin-wall parts is increased.

As a preferable aspect of the present embodiment: the inner side of the positioning sleeve 51 is in sliding fit with the outer side of the fixed pipe 54, the guide sleeve rod 52 extends into the fixed pipe 54 and is opposite to the vertical surface of the displacement sensor 53, and the displacement sensor 53 and the inserted guide sleeve rod 52 can be matched with each other to detect the thickness of the thin wall die-cast by the thin-wall die plate 42.

step one; firstly, the upper die holder 1 and the lower die holder 2 are mutually matched to promote the thin-wall template 42 and the static template 47 to form a die-casting cavity, and at the moment, the metal solution can be led into the cavity from the pouring sleeve 43 and form a thin-wall workpiece under the die-casting of the thin-wall template 42;

step two; when a workpiece is die-cast and formed, the trapezoidal clamping plate 31 and the movable template 35 are driven to slowly rise through the structural cooperation of the local jacking mechanism 3, so that thin-wall parts sandwiched between the vertical surfaces of the thin-wall template 42 and the movable template 35 can be secondarily extruded, and the local parts of the thin-wall parts can obtain a die-casting effect;

step three; after the thin-wall part is die-cast, the upper die base 1 and the lower die base 2 can be separated, and the trapezoidal clamping plate 31 and the movable die plate 35 are driven to lift the die-cast thin-wall part continuously through the structural start of the local jacking mechanism 3, so that the lifted thin-wall part is taken out.

In embodiment 1, as shown in fig. 1 to 3, when the upper die holder 1 and the lower die holder 2 are assembled, the positioning sleeve 51 and the guiding sleeve rod 52 are used to cooperate with each other to insert into the inner layer and the outer layer of the fixing tube 54 for guiding, so that the upper die 41 and the thin-walled die plate 42 are perfectly embedded into the inner side of the stationary die plate 47, and the clamping plate 44 and the clamping seat 48 are used to clamp and seal the two side walls of the inner side of the stationary die plate 47, so as to not only enhance the forming accuracy of the pressure casting in the stationary die plate 47, but also ensure the structural positioning and sealing of the clamping plate 44 and the clamping seat 48 when the movable die plate 35 and the thin-walled die plate 42 are locally extruded, thereby ensuring the extrusion stability of the pressure casting and suppressing the possibility of loosening and air leakage caused by the structural extrusion.

Embodiment 2, as shown in fig. 1 to 3, when the upper mold 41 is integrally inserted into the stationary platen 47, the displacement sensor 53 can be used to intelligently detect the guide sleeve 52 extending into the fixed pipe 54, so that the displacement sensor 53 can perform displacement calculation on the guide sleeve 52 on the same horizontal plane as the thin-walled mold 42, thereby intelligently detecting the die-cast thin-walled thickness between the thin-walled mold 42 and the stationary platen 47, and simultaneously, the two sets of hydraulic cylinders 46 can be started to drive the upper mold 41 and the thin-walled mold 42 to integrally lift under the guidance of the guide grooves 45 according to the detected thickness, thereby adjusting the die-cast thin-walled thickness of the thin-walled mold 42 in coordination with the displacement detection of the displacement sensor 53 and the guide sleeve 52, and increasing the flexibility and the versatility of the device.

The working principle is as follows: when the device is used, the positioning sleeve 51 and the guide sleeve rod 52 can be enabled to penetrate through the inner side and the outer side of the fixed pipe 54 through the die closing state of the upper die holder 1 and the lower die holder 2, the upper die 41, the thin-wall template 42 and the static template 47 can form a die-casting cavity, at the moment, the pouring sleeve 43 can be used for guiding metal solution into the cavity, so that a prototype of a thin-wall piece is obtained, then after the thin-wall piece is formed, the servo motor 34 can be used for starting to drive the gear set 33 to be structurally communicated to force the two groups of screw rods 36 to be in threaded fit with the internal threaded pipe 37, the internal threaded pipe 37 can be used for driving the movable template 35 to slowly rise, further the local secondary extrusion of the thin-wall piece on the vertical surface of the movable template 35 and the thin-wall template 42 can be effectively improved in plasticity and strength, after the thin-wall piece is die-cast, the upper die holder 1 can be lifted, the internal threaded pipe 37 can be continuously started through the structure of the local jacking mechanism 3 to drive the movable template 35 to integrally lift the movable template 35 and the thin-wall piece, the thin-wall part can be taken out directly by an operator, the movable template 35 is reset, the trapezoid clamping plate 31 is embedded into the inner side of the static template 47 again, and therefore the die areas of the static template 47 and the trapezoid clamping plate 31 are restored, and the die casting process of the next round is carried out.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and do not limit the protection scope of the present invention, and those skilled in the art can make simple modifications or equivalent substitutions on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a local thin wall spare die casting die of automobile parts, includes upper die base (1) and die holder (2), its characterized in that: the die-casting die is characterized in that a die-casting system (4) is arranged at the top of the lower die holder (2), the die-casting system (4) comprises an upper die (41), thin-wall templates (42), a pouring sleeve (43), clamping plates (44), guide grooves (45), hydraulic cylinders (46), static templates (47) and clamping seats (48), the static templates (47) are located at the top of the lower die holder (2), the clamping seats (48) are fixedly connected to two sides of the top of the inner side of the lower die holder (2), the hydraulic cylinders (46) are arranged on two sides of the top of the inner part of the upper die holder (1), the upper die (41) is arranged at the output ends of the two groups of hydraulic cylinders (46), the guide grooves (45) are arranged on two sides of the inner part of the upper die holder (1), the clamping plates (44) matched with the clamping seats (48) in a clamping manner are fixedly connected to the bottoms of the two groups of guide grooves (45), and the thin-wall templates (42) are arranged on one side of the bottom of the upper die (41), the middle position inside the upper die base (1) is sleeved with a pouring sleeve (43), and the pouring sleeve (43) extends into the upper die (41) and the thin-wall template (42).

2. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 1, wherein: one side of the bottom inside the lower die holder (2) is provided with a local jacking mechanism (3), and the local top pressure mechanism (3) comprises a trapezoidal clamping plate (31), a mounting groove (32), a gear set (33), a servo motor (34), a movable template (35), a screw rod (36) and an internal threaded pipe (37) respectively, the mounting groove (32) is fixedly connected with one side of the bottom inside the lower die holder (2), a servo motor (34) is arranged at the top inside the mounting groove (32), lead screws (36) are sleeved on two sides of the bottom inside the mounting groove (32), internal thread pipes (37) matched with threads are sleeved on the outer sides of the two groups of lead screws (36), a trapezoidal clamping plate (31) and a movable template (35) are fixedly connected to the tops of the two groups of internal thread pipes (37), and gear sets (33) are arranged at the output end of the servo motor (34) and the bottoms of the outer sides of the two groups of screw rods (36).

3. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 1, wherein: one side at quiet template (47) top is equipped with guide detecting system (5), and guide detecting system (5) respectively including position sleeve (51), guide loop bar (52), displacement sensor (53) and fixed pipe (54), fixed pipe (54) rigid coupling in one side at quiet template (47) top, the inside bottom of fixed pipe (54) is equipped with displacement sensor (53), it is equipped with position sleeve (51) to go up inside one side cover of mould (41), the inside top of position sleeve (51) is equipped with guide loop bar (52).

4. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 1, wherein: positioning seats are arranged on two sides of the upper die base (1), an insertion rod is arranged at the bottom of each positioning seat, and insertion sleeves matched with the insertion rods in an insertion mode are arranged on two sides of the lower die base (2).

5. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 1, wherein: one side of the lower die holder (2) is provided with a control console, the top of the lower die holder (2) is provided with a sunken cavity, and the sunken cavity is matched with the upper die (41) and the thin-wall template (42) mutually.

6. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 1, wherein: the thin-wall template (42), the positioning sleeve (51) and the guide sleeve rod (52) are on the same horizontal plane, the two groups of guide grooves (45) are formed by combining sliding grooves and sliding blocks respectively, the tops of two sides of the upper die (41) are fixedly connected with the sliding blocks, one side of the top of the static template (47) is provided with a trapezoidal groove, and the trapezoidal groove is matched with the trapezoidal clamping plate (31) in a clamping mode.

7. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 2, wherein: the inside both sides of mounting groove (32) are equipped with the guide slot, and the inboard of guide slot is equipped with the guide block with internal thread pipe (37) rigid coupling, movable mould board (35) and quiet template (47) are same horizontal plane.

8. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 2, wherein: gear train (33) are formed by gear and fluted disc and bull stick combination respectively, the output of servo motor (34) is equipped with the fluted disc, the both sides cover of the inside bottom of mounting groove (32) is equipped with the bull stick, and the outside of bull stick and lead screw (36) is equipped with intermeshing's gear.

9. The die-casting die for the partial thin-walled part of the automobile part as claimed in claim 3, wherein: the inner side of the positioning sleeve (51) is in sliding fit with the outer side of the fixed pipe (54), and the guide sleeve rod (52) extends into the fixed pipe (54) and is opposite to the vertical surface of the displacement sensor (53).

10. A die casting process of a die casting die for a partial thin-walled automobile part, comprising the die casting die for a partial thin-walled automobile part according to any one of claims 1 to 9, the die casting process comprising the steps of:

step one; firstly, an upper die holder (1) and a lower die holder (2) are mutually matched to promote a die-casting cavity to be formed between a thin-wall template (42) and a static template (47), and at the moment, metal solution can be led into the cavity from a pouring sleeve (43) and a thin-wall workpiece is formed under the die-casting of the thin-wall template (42);

step two; when a workpiece is die-cast and formed, the trapezoidal clamping plate (31) and the movable template (35) are driven to slowly rise through the structural cooperation of the local jacking mechanism (3), and then thin-wall parts on the vertical surface interlayers of the thin-wall template (42) and the movable template (35) can be secondarily extruded, so that the local part of the thin-wall part is die-cast;

step three; after the thin-walled part is die-cast, the upper die holder (1) and the lower die holder (2) can be separated, and the structure of the local top pressing mechanism (3) is continuously started to drive the trapezoidal clamping plate (31) and the movable die plate (35) to drive the die-cast thin-walled part to be lifted, so that the lifted thin-walled part is taken out.