WO2025081554A1 - Insert block type stamping die and process for half-housing stamping-formed part - Google Patents

Abstract

Disclosed in the present invention is an insert block type stamping die for a half-housing stamping-formed part, comprising an upper female die and a lower male die. A main male die body is provided on the upper side of the lower male die. The upper surface of the main male die body is a main forming convex surface. A main female die recess is formed on the lower side of the upper female die. A first auxiliary female die recess and a second auxiliary female die recess are respectively formed and communicated with two sides of the main female die recess. A first insert groove and a second insert groove which run through in the up-down direction are respectively formed on two sides of the main male die body. A first insert block and a second insert block capable of moving up and down are correspondingly provided in the first insert groove and the second insert groove. In this way, a material can be prevented from being stacked at formed first half-pipe opening wall and second half-pipe opening wall.

Description

Insert type stamping die and process for half shell stamping parts Technical Field

The invention belongs to the field of molds.

Background Art

As shown in FIG. 1 , the half-shell stamping part can be formed into a complete shell (such as a muffler shell structure) after two pieces of such half-shell stamping parts are welded. Since the first half pipe mouth wall 28a and the second half pipe mouth wall 28b of such half-shell stamping part are used to connect pipelines after butt welding, the molding quality requirements at the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are higher than those of the half-shell body. However, since the curvature of the first half pipe mouth wall 28a and the second half pipe mouth wall 28b during the stamping process is the largest, the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are areas where stacked materials are easily formed, resulting in unqualified products. The existing stamping parts of this type are generally stamped once, and both the main part of the half-shell 28 and the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are stamped simultaneously, resulting in the inability to release the stacked materials formed at the first half pipe mouth wall 28a and the second half pipe mouth wall 28b.

Technical issues

In order to overcome the deficiencies in the prior art, the present invention provides an insert-type stamping die and process for a half-shell stamping part, which can prevent the first half pipe mouth wall and the second half pipe mouth wall from forming stacked materials after forming.

Technical Solutions

To achieve the above object, an insert-type stamping die for a half-shell stamping part of the present invention comprises an upper die and a lower punch, wherein a main punch body is arranged on the upper side of the lower punch, and the upper surface of the main punch body is a main forming convex surface; a main die groove is arranged on the lower side of the upper die;

The first and second auxiliary die grooves are connected on both sides of the main die groove; the first and second embedded grooves are connected vertically on both sides of the main punch body, and the first and second embedded blocks that can move up and down are respectively arranged in the first and second embedded grooves.

Furthermore, the upper ends of the first insert and the second insert are respectively the first semicircular molding convex surface and the second semicircular molding convex surface; when the upper die and the lower die are in a fully closed state, a main molding cavity for filling the half shell is formed between the main molding convex surface and the main die groove, a first secondary molding cavity for filling the first half of the pipe mouth wall is formed between the first semicircular molding convex surface and the first secondary die groove, and a second secondary molding cavity for filling the second half of the pipe mouth wall is formed between the second semicircular molding convex surface and the second secondary die groove.

Further, the lower ends of the first insert and the second insert are supported by the first nitrogen spring and the second nitrogen spring respectively.

Furthermore, a first limiting protrusion and a second limiting protrusion are fixedly provided on one side where the lower ends of the first insert and the second insert are close to each other; a first vertical limiting groove and a second vertical limiting groove are provided on both sides of the bottom of the main convex mold body, and the first limiting protrusion and the second limiting protrusion are respectively placed in the first limiting groove and the second limiting groove; the bottom ends of the first limiting groove and the second limiting groove are respectively the first limiting surface and the second limiting surface.

Furthermore, when the upper concave die and the lower convex die are completely combined and the half shell body is just punched out, the lower ends of the first limiting protrusion and the second limiting protrusion contact the first limiting surface and the second limiting surface respectively.

Furthermore, a first arc groove and a second arc groove are respectively provided on one side of the middle parts of the first insert block and the second insert block which are close to each other.

Furthermore, a central cavity is provided inside the main punch body, and a first guide channel and a second guide channel are connected on both sides thereof and are arranged on the same horizontal extension line, and a first wheel cavity and a second wheel cavity are connected at the ends of the first guide channel and the second guide channel that are far away from each other; a first push rod and a second push rod are slidingly arranged in the first guide channel and the second guide channel respectively along the length direction; a first universal ball and a second universal ball are rotatably arranged at the ends of the first push rod and the second push rod that are close to each other; a spiral cam is provided in the central cavity, and the spiral cam is fixedly mounted on the cam drive shaft, and the cam surface gradually moves away from the axis of the cam drive shaft in the clockwise direction of its own spiral profile, and the first universal ball and the second universal ball are both rolling tangent to the cam surface; a first temporary positioning wheel and a second temporary positioning wheel are provided in the first wheel cavity and the second wheel cavity respectively, and the inner diameter of the arc of the first arc groove and the second arc groove is consistent with the outer diameter of the first temporary positioning wheel and the second temporary positioning wheel respectively; the first roller support and the second roller support of the first temporary positioning wheel and the second temporary positioning wheel are fixedly connected to the ends of the first push rod and the second push rod that are far away from each other respectively.

Furthermore, when the upper concave mold and the lower punch are in a separated state without closing the film, a portion of the first temporary positioning wheel and the second temporary positioning wheel that are away from each other are respectively sunk into the first arc groove and the second arc groove; and the lower ends of the first limiting protrusion and the second limiting protrusion respectively maintain a distance from the first limiting surface and the second limiting surface.

Furthermore, a forming process of an insert-type stamping die for a half-shell stamping part: the upper die and the lower punch are in a separated state, and a portion of the first temporary positioning wheel and the second temporary positioning wheel that are away from each other are respectively immersed in the first arc groove and the second arc groove; at the moment when the first half pipe mouth wall and the second half pipe mouth wall are about to be completely formed, the spiral cam is quickly controlled to rotate clockwise.

Beneficial Effects

In step three of the present invention, when the main molding cavity between the main molding convex surface and the main die groove for filling the half shell body has not been completely generated, the first secondary molding cavity between the first semicircular molding convex surface at the upper end of the first insert and the first secondary die groove for filling the first half tube mouth wall, and the second secondary molding cavity between the second semicircular molding convex surface at the upper end of the second insert and the second secondary die groove for filling the second half tube mouth wall are preferentially formed; thereby preferentially achieving the complete molding of the first half tube mouth wall and the second half tube mouth wall, while the main body of the half shell body between the first half tube mouth wall and the second half tube mouth wall has not yet been rigidly squeezed, and the local overlapping materials generated in the process of preferentially completing the molding of the first half tube mouth wall and the second half tube mouth wall will be smoothly squeezed to the part that has not yet been fully molded, thereby avoiding the problem that the stress generated by the overlapping materials in the molding process of the first half tube mouth wall and the second half tube mouth wall cannot be released; thereby preferentially ensuring the molding quality of the first half tube mouth wall and the second half tube mouth wall.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the conversion of a blank plate into a half-shell molded part;

Figure 2 shows the upper die and the lower punch changing from a fully closed mold state to an open mold state;

Figure 3 is a schematic diagram of the entire mold;

Figure 4 is a first perspective view of the mold opening state;

Figure 5 is a second perspective view of the mold opening state;

Figure 6 is a schematic diagram of the lower punch, with the first insert and the second insert hidden;

Figure 7 is a front view of the lower punch;

Figure 8 is a cross-sectional view of the lower punch;

Figure 9 is a schematic diagram of the internal transmission components of the lower punch.

Embodiments of the present invention

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 to 8, an insert-type stamping die for a half-shell stamping part, as shown in Figure 1, the part stamped by the stamping die is a half-shell 27, and the two ends of the half-shell 27 are respectively integrally connected with an arched first half pipe mouth wall 28a and a second half pipe mouth wall 28b; two pieces of such half-shell 27 molded parts can be welded to form a complete shell (such as a muffler shell structure), because the first half pipe mouth wall 28a and the second half pipe mouth wall 28b of such a half-shell molded part are used to connect pipelines after welding, the molding quality requirements at the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are higher than those of the main body of the half-shell 27; however, since the curvature of the first half pipe mouth wall 28a and the second half pipe mouth wall 28b during the stamping process is the largest, the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are areas where stacked materials are easily formed; this solution designs the following solution to solve this problem.

As shown in Figures 2, 3, and 4, the upper die 22 and the lower die 21 are included. The upper side of the lower die 21 is fixedly provided with a main die body 18, and the upper surface of the main die body 18 is a main molding convex surface 15; the lower side of the upper die 22 is provided with a main die groove 23 that matches the main die body 18; the two sides of the main die groove 23 are connected with a first auxiliary die groove 24a and a second auxiliary die groove 24b; the two sides of the main die body 18 are respectively provided with a first embedding groove 20a and a second embedding groove 20b that are connected up and down, and the first embedding groove 20a and the second embedding groove 20b are respectively provided with a first embedding block 1a and a first embedding block 1a that can move up and down. The upper ends of the second insert 1b, the first insert 1a and the second insert 1b are respectively the first semicircular molding convex surface 2a and the second semicircular molding convex surface 2b; when the upper die 22 and the lower punch 21 are in a fully closed state, a main molding cavity for filling the half shell 27 is formed between the main molding convex surface 15 and the main die groove 23, a first secondary molding cavity for filling the first half pipe mouth wall 28a is formed between the first semicircular molding convex surface 2a and the first secondary die groove 24a, and a second secondary molding cavity for filling the second half pipe mouth wall 28b is formed between the second semicircular molding convex surface 2b and the second secondary die groove 24b.

As shown in FIG6 , the lower ends of the first insert 1a and the second insert 1b are supported by the first nitrogen spring 4a and the second nitrogen spring 4b respectively. We heat treat the first insert 1a and the second insert 1b separately to increase their surface hardness and wear resistance.

As shown in Figure 7, the first limiting protrusion 9a and the second limiting protrusion 9b are fixedly provided on the side where the lower ends of the first insert 1a and the second insert 1b are close to each other; the first vertical limiting groove 10a and the second limiting groove 10b are respectively provided on both sides of the bottom of the main punch body 18, and the first limiting protrusion 9a and the second limiting protrusion 9b are respectively placed in the first limiting groove 10a and the second limiting groove 10b; the bottom ends of the first limiting groove 10a and the second limiting groove 10b are respectively the first limiting surface 11a and the second limiting surface 11b; when the upper die 22 and the lower punch 21 are completely combined and the half shell 27 is just punched out, the lower ends of the first limiting protrusion 9a and the second limiting protrusion 9b are respectively contacted with the first limiting surface 11a and the second limiting surface 11b.

As shown in Figure 7, the first arc groove 3a and the second arc groove 3b are respectively provided on the side where the middle part of the first insert 1a and the second insert 1b is close to each other; the main punch body 18 is provided with a central cavity 14 inside, and the first guide channel 7a and the second guide channel 7b are respectively connected on the same horizontal extension line on both sides, and the first guide channel 7a and the second guide channel 7b are respectively connected at the ends away from each other with the first wheel cavity 6a and the second wheel cavity 6b; the first guide channel 7a and the second guide channel 7b are respectively provided with a first push rod 8a and a second push rod 8b sliding along the length direction in the first guide channel 7a and the second guide channel 7b; the first universal ball 13a and the second universal ball 13b are respectively rotatably provided at the ends where the first push rod 8a and the second push rod 8b are close to each other; a spiral cam 19 is provided in the central cavity 14, and the spiral cam 19 is fixedly mounted on the cam drive shaft 40, and the cam drive shaft 40 is driven by a motor or other transmission structure that can respond quickly, and the contour line of the cam surface 16 on the outer periphery of the spiral cam 19 is a constant speed spiral, and the cam surface 16 is along The clockwise direction of its own spiral profile gradually moves away from the axis of the cam drive shaft 40, and the first universal ball 13a and the second universal ball 13b are both tangent to the cam surface 16; the first wheel cavity 6a and the second wheel cavity 6b are respectively provided with the first temporary positioning wheel 5a and the second temporary positioning wheel 5b, and the inner diameter of the first arc groove 3a and the second arc groove 3b is respectively consistent with the outer diameter of the first temporary positioning wheel 5a and the second temporary positioning wheel 5b; the first temporary positioning wheel 5a and the second temporary positioning wheel 5b are respectively provided with the first temporary positioning wheel 5a and the second temporary positioning wheel 5b. The roller support 12a and the second roller support 12b are respectively fixedly connected to one end of the first push rod 8a and the second push rod 8b that are away from each other; when the upper die 22 and the lower punch 21 are in a separated state without film closing, parts of the first temporary positioning wheel 5a and the second temporary positioning wheel 5b that are away from each other are respectively sunk into the first arc groove 3a and the second arc groove 3b; and the lower ends of the first limiting protrusion 9a and the second limiting protrusion 9b respectively maintain a distance of approximately 3 mm from the first limiting surface 11a and the second limiting surface 11b.

Process: Step 1, in the initial state, the upper die 22 and the lower punch 21 are in a mutually separated state, and the first temporary positioning wheel 5a and the second temporary positioning wheel 5b are respectively separated from each other and fall into the first arc groove 3a and the second arc groove 3b, so that the height of the first insert block 1a and the second insert block 1b is temporarily fixed; at this time, the lower ends of the first limiting protrusion 9a and the second limiting protrusion 9b respectively maintain a distance from the first limiting surface 11a and the second limiting surface 11b;

Step 2: Position the plate-shaped blank 26 to be stamped between the upper die 22 and the lower punch 21 to wait for stamping:

Step 3: Control the lower punch 21 to move downward to perform a stamping action. Before the upper die 22 and the lower punch 21 are completely molded, when the lower punch 21 presses the upper die 22 downward, when the main molding cavity for filling the half shell 27 between the main molding convex surface 15 and the main die groove 23 has not been completely generated, the first secondary molding cavity for filling the first half pipe mouth wall 28a between the first semicircular molding convex surface 2a at the upper end of the first insert 1a and the first secondary die groove 24a, and the second semicircular molding convex surface 2b at the upper end of the second insert 1b and the second secondary die groove 24b for filling the first secondary molding cavity between the first semicircular molding convex surface 2a and the second secondary die groove 24b for filling the second secondary molding cavity between the first semicircular molding convex surface 2b and the second secondary die groove 24b for filling the second secondary molding cavity between the first semicircular molding convex surface 2a and the second secondary die groove 24b for filling the first secondary molding cavity between the first semicircular molding convex surface 2a and the second secondary die groove 24b for filling the first secondary molding cavity between the first semicircular molding convex surface 2a and the second secondary die groove 24b for filling the first secondary molding cavity between the first semicircular molding convex surface 2a and the second secondary die groove 24b for filling the first secondary molding cavity between the first semicircular molding convex surface 2a and the first ... The second secondary molding cavity of the second half pipe opening wall 28b is formed first; thus, the first half pipe opening wall 28a and the second half pipe opening wall 28b are fully molded first, and the main body of the half shell 27 between the first half pipe opening wall 28a and the second half pipe opening wall 28b has not been rigidly squeezed. The local overlapping materials generated during the process of the first half pipe opening wall 28a and the second half pipe opening wall 28b being preferentially molded will be smoothly squeezed out to the part that has not been fully molded, thereby avoiding the problem that the stress generated by the overlapping materials during the molding process of the first half pipe opening wall 28a and the second half pipe opening wall 28b cannot be released;

Step 4: In the previous step, at the moment when the first half pipe mouth wall 28a and the second half pipe mouth wall 28b are about to be completely formed, the spiral cam 19 is quickly controlled to rotate clockwise, so as to release the rigid positioning of the first push rod 8a and the second push rod 8b in the axial direction; the first insert block 1a and the second insert block 1b are displaced downward under the impact of the upper die 22, and when the lower ends of the first limiting protrusion 9a and the second limiting protrusion 9b of the first insert block 1a and the second insert block 1b are respectively limited to contact the first limiting surface 11a and the second limiting surface 11b, the upper die 22 and the lower punch 21 are just completely molded, and the half shell 27 is completely formed;

Step five, control the upper die 22 to move upward and separate from the lower punch 21, at this time the robot takes out the formed half shell 27, at the same time, the first insert 1a and the second insert 1b are moved upward under the upward elastic force of the first nitrogen spring 4a and the second nitrogen spring 4b to restore to the original height, at the same time control the spiral cam 19 to rotate counterclockwise to the initial state, so that the first temporary positioning wheel 5a and the second temporary positioning wheel 5b are respectively re-entered into the first arc groove 3a and the second arc groove 3b, thereby completing a stamping process cycle.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims (9)

An insert-type stamping die for a half-shell stamping part, characterized in that it comprises an upper die (22) and a lower punch (21), wherein a main punch body (18) is arranged on the upper side of the lower punch (21), and the upper surface of the main punch body (18) is a main forming convex surface (15); and a main die groove (23) is arranged on the lower side of the upper die (22); The two sides of the main die groove (23) are connected with a first auxiliary die groove (24a) and a second auxiliary die groove (24b); the two sides of the main punch body (18) are respectively provided with a first embedding groove (20a) and a second embedding groove (20b) which penetrate up and down, and the first embedding groove (20a) and the second embedding groove (20b) are respectively provided with a first embedding block (1a) and a second embedding block (1b) which can move up and down. According to claim 1, an insert-type stamping die for a half-shell stamping part is characterized in that: the upper ends of the first insert (1a) and the second insert (1b) are respectively a first semicircular molding convex surface (2a) and a second semicircular molding convex surface (2b); when the upper die (22) and the lower punch (21) are in a fully closed state, a main molding cavity for filling the half shell (27) is formed between the main molding convex surface (15) and the main die groove (23), a first secondary molding cavity for filling the first half pipe mouth wall (28a) is formed between the first semicircular molding convex surface (2a) and the first secondary die groove (24a), and a second secondary molding cavity for filling the second half pipe mouth wall (28b) is formed between the second semicircular molding convex surface (2b) and the second secondary die groove (24b). The insert-type stamping die for a half-shell stamping part according to claim 2 is characterized in that the lower ends of the first insert (1a) and the second insert (1b) are supported by a first nitrogen spring (4a) and a second nitrogen spring (4b) respectively. According to claim 3, an insert-type stamping die for a half-shell stamping part is characterized in that: a first limiting protrusion (9a) and a second limiting protrusion (9b) are fixedly provided on the side where the lower ends of the first insert (1a) and the second insert (1b) are close to each other; a vertical first limiting groove (10a) and a second limiting groove (10b) are respectively provided on both sides of the bottom of the main punch body (18), and the first limiting protrusion (9a) and the second limiting protrusion (9b) are respectively placed in the first limiting groove (10a) and the second limiting groove (10b); the bottom ends of the first limiting groove (10a) and the second limiting groove (10b) are respectively the first limiting surface (11a) and the second limiting surface (11b). According to claim 4, an insert-type stamping die for a half-shell stamping part is characterized in that: when the upper die (22) and the lower die (21) are completely engaged and the half shell (27) is just stamped out, the lower ends of the first limiting protrusion (9a) and the second limiting protrusion (9b) respectively contact the first limiting surface (11a) and the second limiting surface (11b). The insert-type stamping die for a half-shell stamping part according to claim 4 is characterized in that a first arc groove (3a) and a second arc groove (3b) are respectively provided on one side of the middle of the first insert (1a) and the second insert (1b) close to each other. According to claim 6, an insert-type stamping die for a half-shell stamping part is characterized in that: a central cavity (14) is provided inside the main punch body (18), and a first guide channel (7a) and a second guide channel (7b) are respectively connected on both sides thereof and are arranged on the same horizontal extension line; the first guide channel (7a) and the second guide channel (7b) are respectively connected at the ends away from each other with a first wheel cavity (6a) and a second wheel cavity (6b); a first push rod (8a) and a second push rod (8b) are respectively slidably arranged in the first guide channel (7a) and the second guide channel (7b) along the length direction; a first universal ball (13a) and a second universal ball (13b) are respectively rotatably arranged at the ends of the first push rod (8a) and the second push rod (8b) that are close to each other; a spiral cam (19) is provided in the central cavity (14) The spiral cam (19) is fixedly mounted on the cam drive shaft (40); the cam surface (16) gradually moves away from the axis of the cam drive shaft (40) in the clockwise direction of its own spiral profile; the first universal ball (13a) and the second universal ball (13b) both roll tangent to the cam surface (16); a first temporary positioning wheel (5a) and a second temporary positioning wheel (5b) are respectively arranged in the first wheel cavity (6a) and the second wheel cavity (6b); the inner diameter of the first circular arc groove (3a) and the second circular arc groove (3b) are respectively consistent with the outer diameter of the first temporary positioning wheel (5a) and the second temporary positioning wheel (5b); the first roller support (12a) and the second roller support (12b) of the first temporary positioning wheel (5a) and the second temporary positioning wheel (5b) are respectively fixedly connected to the ends of the first push rod (8a) and the second push rod (8b) that are away from each other. According to claim 7, an insert-type stamping die for a half-shell stamping part is characterized in that: when the upper die (22) and the lower die (21) are in a mutually separated state without closing the film, a portion of the first temporary positioning wheel (5a) and the second temporary positioning wheel (5b) that are away from each other are respectively sunk into the first arc groove (3a) and the second arc groove (3b); and the lower ends of the first limiting protrusion (9a) and the second limiting protrusion (9b) respectively maintain a distance from the first limiting surface (11a) and the second limiting surface (11b). According to claim 8, a forming process of an insert-type stamping die for a half-shell stamping part is characterized in that: the upper die (22) and the lower punch (21) are in a mutually separated state, and a portion of the first temporary positioning wheel (5a) and the second temporary positioning wheel (5b) that are away from each other are respectively immersed in the first arc groove (3a) and the second arc groove (3b); at the moment when the first half pipe mouth wall (28a) and the second half pipe mouth wall (28b) are about to be completely formed, the spiral cam (19) is quickly controlled to rotate clockwise.