Boss forming mechanism capable of automatically reversing in progressive die

Abstract

The invention belongs to the technical field of boss forming, and particularly relates to a boss forming mechanism capable of automatically reversing in a progressive die, which comprises an upper die holder, a lower die holder, a forming male die and a forming female die. The die further comprises a reversing mechanism, the reversing mechanism is arranged on the upper die base and comprises a first reversing gear and a second reversing gear, and the first reversing gear and the second reversing gear are arranged on the upper die base. The forming male die comprises a connecting shaft, an adapter and a male die head. The connecting shaft is rotationally connected to the upper die base, the male die head is arranged below the connecting shaft and faces the forming female die, through holes allowing the connecting shaft to penetrate through are formed in the first reversing gear and the second reversing gear, the first reversing gear is located above the second reversing gear, the adapter is arranged on the connecting shaft, and the male die head is arranged below the connecting shaft and faces the forming female die. And the adapter is positioned between the first reversing gear and the second reversing gear. The forming male die can rotate by a certain angle in one direction through one stamping action, and therefore forming convex hulls of different angles can be obtained in the continuous stamping process.

Description

Technical Field

[0001] The invention belongs to the technical field of boss forming, and in particular relates to a boss forming mechanism capable of automatic reversal in a progressive die. Background Art

[0002] At present, traditional boss forming mechanisms usually rely on fixed molds or forming tools, which makes the forming direction and position relatively fixed, and it is difficult to flexibly realize boss forming in different directions in continuous stamping production. This greatly limits production efficiency and flexibility. In specific applications, especially when storing sheets, the traditional boss forming method often lacks sufficient gaps between adjacent sheets, which makes it easy for the sheets to be adsorbed together, causing inconvenience to the handling and processing of the sheets. On the automated production line, tools such as manipulator clamps need to efficiently and conveniently clamp and transport the sheets, but due to the adsorption phenomenon between the sheets, the operating efficiency and precision are affected, thereby limiting the overall efficiency of the production line. Therefore, in response to the above problems, this project introduces an automatic reversing mechanism, which can realize boss forming in any direction during the continuous stamping production process. Summary of the invention

[0003] The purpose of the present invention is to provide a boss forming mechanism capable of automatic reversal in a progressive die, aiming to solve the problem in the prior art of ensuring sufficient clearance between sheets to avoid adsorption, and facilitating accurate clamping by tools such as manipulators, thereby significantly improving production efficiency and product quality.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a boss forming mechanism capable of automatic reversal in a progressive die, comprising an upper die seat, a lower die seat, a forming convex die and a forming concave die. The upper die seat is arranged above the lower die seat, the forming concave die is arranged on the upper surface of the lower die seat, the forming convex die is arranged on the lower surface of the upper die seat, and the forming convex die is arranged above the forming concave die. It also includes a reversing mechanism, which is arranged on the upper die seat, and the reversing mechanism includes a first reversing gear and a second reversing gear, and the first reversing gear and the second reversing gear are arranged on the upper die seat. The forming convex die includes a connecting shaft, an adapter and a convex die head. The connecting shaft is rotatably connected to the upper die base, the punch head is arranged below the connecting shaft and faces the forming die, the first reversing gear and the second reversing gear are provided with through holes for the connecting shaft to pass through, and the first reversing gear is located above the second reversing gear, the adapter is arranged on the connecting shaft, and the adapter is located between the first reversing gear and the second reversing gear, the upper end of the adapter is provided with a first driven part corresponding to the first reversing gear, and the lower end of the adapter is provided with a second driven part corresponding to the second reversing gear.

[0005] Furthermore, it is characterized in that: a pressing plate is also provided at the bottom end of the upper die seat, the pressing plate and the bottom end of the second reversing gear are located on the same horizontal plane, the pressing plate is located at the front end of the forming punch, and is used to guide the material plate to enter under the forming punch.

[0006] Furthermore, the reversing mechanism further comprises a guide sleeve, which is arranged on the upper die seat, the first reversing gear is arranged above the guide sleeve, and the second reversing gear is arranged below the guide sleeve. The guide sleeve is matched with the first reversing gear or the second reversing gear after the adapter passes through.

[0007] Furthermore, the reversing mechanism further includes a top block and a rectangular spring. The top block is arranged on the upper die seat, and one end of the top block is fixedly connected to the upper die seat, and the other end of the top block is rotatably connected to the connecting shaft. The rectangular spring is sleeved on the connecting shaft, and one end of the rectangular spring is connected to the top block, and the other end is connected to the first reversing gear, and the first reversing gear is slidably arranged on the connecting shaft.

[0008] Further, the first reversing gear includes a first connecting portion and a first tooth surface, the first connecting portion is connected above the first tooth surface, the shaft diameter of the first connecting portion is larger than the aperture of the guide sleeve, and the tooth diameter of the first tooth surface is smaller than the aperture of the guide sleeve. The second reversing gear includes a second connecting portion and a second tooth surface, the second connecting portion is connected below the second tooth surface, the shaft diameter of the second connecting portion is larger than the aperture of the guide sleeve, and the tooth diameter of the second tooth surface is smaller than the aperture of the guide sleeve.

[0009] Furthermore, the upper end of the adapter is provided with a first phase meshing tooth surface matching with the first tooth surface, and the lower end of the adapter is provided with a second phase meshing tooth surface matching with the second tooth surface.

[0010] Furthermore, the first tooth surface includes a plurality of first teeth, each of which is arranged in an annular array on the first connecting portion; the second tooth surface includes a plurality of second teeth, each of which is arranged in an annular array on the second connecting portion; the number of first teeth is equal to that of second teeth, and the first teeth are arranged above the second teeth. The first phase tooth surface includes a plurality of first transfer teeth, and the second phase tooth surface includes a plurality of second transfer teeth, and the first transfer teeth and the second transfer teeth are alternately arranged at the upper and lower ends of the transfer head. A first driving slope is provided at the bottom end of the first tooth, and a first driven slope is provided at the top end of the first transfer tooth, and the first driving slope and the first driven slope are arranged in cooperation with each other; a second driving slope is provided at the top end of the second tooth, and a second driven slope is provided at the bottom end of the second transfer tooth, and the second driving slope and the second driven slope are arranged in cooperation with each other, and the first driven slope and the second driven slope are in opposite directions.

[0011] The above one or more technical solutions in a boss forming mechanism capable of automatic reversal in a progressive die provided by an embodiment of the present invention have at least one of the following technical effects: placing a material plate between a forming punch and a forming die, and then the punch press moves downward, and the upper die seat moves downward to drive the connecting shaft, the punch head and the adapter to move downward toward the forming die. During the downward process, when the second driven part of the adapter begins to contact the second reversing gear, the adapter drives the connecting shaft, the punch head and the adapter to move downward and rotate under the action of the special gear structure of the second reversing gear. The adapter is clamped and positioned by the second reversing gear. At this time, the punch press continues to move downward, and the forming punch and the forming die work to complete the convex hull forming action. Then the punch press starts to move upward, driving the connecting shaft, the punch head and the adapter to move upward. After moving upward for a distance, the first driven part of the adapter begins to contact the first reversing gear, and under the action of the special gear structure, it moves upward and rotates until it reaches the top and is clamped and positioned by the first reversing gear. Then the punch press moves upward to the top dead center, and a stamping action is completed. In this process, the two rotation directions of the connecting shaft are consistent, so that one stamping action can cause the forming punch to rotate a certain angle in one direction, so that forming convex hulls of different angles can be obtained in continuous stamping, so that there are gaps between the sheets and they will not be adsorbed together, making it convenient for tools such as robot clamps to clamp the sheets, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 A cross-sectional view of an open state of a boss forming mechanism capable of automatic reversal in a progressive die is provided for an embodiment of the present invention.

[0014] Figure 2 A cross-sectional view of a closed state of a boss forming mechanism capable of automatic reversal in a progressive die is provided for an embodiment of the present invention.

[0015] Figure 3 For the present invention Figure 1 The embodiment provides an enlarged schematic diagram of a local area A capable of automatic reversal in a progressive die.

[0016] Figure 4 A schematic diagram of the connection structure of a forming punch and a reversing mechanism of a boss forming mechanism capable of automatic reversal in a progressive die is provided for an embodiment of the present invention.

[0017] Reference numerals: 100, upper die seat; 110, press plate; 200, lower die seat; 300, forming punch; 310, connecting shaft; 320, adapter; 321, first driven part; 322, second driven part; 323, first phase meshing tooth surface; 324, second phase meshing tooth surface; 325, first transfer tooth; 326, second transfer tooth; 327, first driven slope; 328, second driven slope; 330, punch Head; 400, forming die; 500, reversing mechanism; 510, first reversing gear; 511, first connecting portion; 512, first tooth surface; 513, first meshing tooth; 514, first driving slope; 520, second reversing gear; 521, second connecting portion; 522, second tooth surface; 523, second meshing tooth; 524, second driving slope; 530, guide sleeve; 540, top block; 550, rectangular spring. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0022] In one embodiment of the present invention, reference Figure 1 to Figure 4As shown, a boss forming mechanism capable of automatic reversal in a progressive die is provided, comprising an upper die base 100, a lower die base 200, a forming convex die 300 and a forming concave die 400. The upper die base 100 is arranged above the lower die base 200, the forming concave die 400 is arranged on the upper surface of the lower die base 200, the forming convex die 300 is arranged on the lower surface of the upper die base 100, and the forming convex die 300 is arranged above the forming concave die 400. A reversing mechanism 500 is also included, the reversing mechanism 500 is arranged on the upper die base 100, the reversing mechanism 500 comprises a first reversing gear 510 and a second reversing gear 520, and the first reversing gear 510 and the second reversing gear 520 are arranged on the upper die base 100. The forming convex die 300 comprises a connecting shaft 310, an adapter 320 and a convex die head 330. The connecting shaft 310 is rotatably connected to the upper die base 100, and the punch head 330 is arranged below the connecting shaft 310 and faces the molding die 400. The first reversing gear 510 and the second reversing gear are provided with through holes for the connecting shaft 310 to pass through, and the first reversing gear 510 is located above the second reversing gear 520. The adapter 320 is arranged on the connecting shaft 310, and the adapter 320 is located between the first reversing gear 510 and the second reversing gear 520. The upper end of the adapter 320 is provided with a first driven part 321 corresponding to the first reversing gear 510, and the lower end of the adapter 320 is provided with a second driven part 322 corresponding to the second reversing gear 520. In this embodiment, the material plate is placed between the forming punch 300 and the forming die 400, and then the punch press moves downward, and the upper die base 100 moves downward to drive the connecting shaft 310, the punch head 330 and the adapter 320 to move downward toward the forming die 400. During the downward process, when the second driven portion 322 of the adapter 320 begins to contact the second reversing gear 520, the adapter 320, under the action of the special gear structure of the second reversing gear 520, drives the connecting shaft 310, the punch head 330 and the adapter 320 to move downward and rotate, and the adapter 320 is stuck and positioned by the second reversing gear 520. At this time, the punch press continues to move downward, and the forming punch 300 acts on the forming die 400 to complete the convex hull forming action. Then the punch press starts to move upward, driving the connecting shaft 310, the punch head 330 and the adapter 320 to move upward. After moving upward for a certain distance, the first driven part 321 of the adapter 320 starts to contact the first reversing gear 510, and under the action of the special gear structure, it moves upward while rotating until it reaches the top and is caught and positioned by the first reversing gear 510. Then the punch press moves upward to the top dead center, and a stamping action is completed. In this process, the two rotation directions of the connecting shaft 310 are consistent, so that one stamping action can make the forming punch 300 rotate a certain angle in one direction, so that forming convex hulls of different angles can be obtained in continuous stamping, so that there is a gap between the sheets and they will not be adsorbed together, which is convenient for tools such as robot clamps to clamp the sheets, thereby improving production efficiency.

[0023] More specifically, refer to Figure 1 to Figure 4 As shown, when the adapter 320 and the second reversing gear 520 contact at a dead point, the connecting shaft 310 rotates 45 degrees, and when the adapter 320 and the first reversing gear 510 contact at a dead point, the connecting shaft 310 rotates 45 degrees in the same direction, so that the connecting shaft 310 can rotate 90 degrees in one stamping action.

[0024] Specifically, refer to Figure 1 to Figure 4 As shown, the feature is that: a pressing plate 110 is further provided at the bottom end of the upper die seat 100, the pressing plate 110 and the bottom end of the second reversing gear 520 are located on the same horizontal plane, the pressing plate 110 is located at the front end of the forming convex die 300, and is used to guide the material plate to enter under the forming convex die 300. In this embodiment, the pressing plate 110 is used to position and level the material plate, so that the material plate entering the forming convex die 300 and the forming concave die 400 can remain in a flat state and closely attached to the bottom of the first reversing gear 510, so as to avoid the material plate from being offset during the process of punching the material plate 110.

[0025] Specifically, refer to Figure 1 to Figure 4 As shown, the reversing mechanism 500 further includes a guide sleeve 530, which is disposed on the upper die base 100, the first reversing gear 510 is disposed above the guide sleeve 530, and the second reversing gear 520 is disposed below the guide sleeve 530. The guide sleeve 530 is provided for the adapter 320 to pass through and then cooperate with the first reversing gear 510 or the second reversing gear 520. In this embodiment, the contact action between the adapter 320 and the second reversing gear 520 and the contact action between the adapter 320 and the first reversing gear 510 are both completed in the guide sleeve 530, thereby ensuring that no deviation occurs when the convex hull rotates.

[0026] Specifically, refer to Figure 1 to Figure 4As shown, the reversing mechanism 500 further includes a top block 540 and a rectangular spring 550. The top block 540 is disposed on the upper die holder 100, and one end of the top block 540 is fixedly connected to the upper die holder 100, and the other end of the top block 540 is rotatably connected to the connecting shaft 310. The rectangular spring 550 is sleeved on the connecting shaft 310, and one end of the rectangular spring 550 is connected to the top block 540, and the other end is connected to the first reversing gear 510, and the first reversing gear 510 is slidably disposed on the connecting shaft 310. In this embodiment, when the upper die base 100 is in the process of descending, it drives the first reversing gear 510 to abut against the guide sleeve 530. At this time, the connecting shaft 310, the adapter 320 and the punch head 330 continue to descend, and the rectangular spring 550 compresses the first reversing gear 510 to keep it stationary. The adapter 320 separates from the first reversing gear 510 and contacts the second reversing gear 520 at the lower end, thereby driving the forming punch 300 to rotate. When the stamping is completed, the upper die base 100 ascends, and the connecting shaft 310, the adapter 320 and the punch head 330 ascend until the adapter 320 contacts the first reversing gear 510. At this time, the spring is in a compressed state, causing the first reversing gear 510 to abut against the adapter 320, thereby driving the forming punch 300 to rotate. Subsequently, the spring elastic potential energy is released, and the first reversing gear 510 moves upward driven by the upper die base 100 to complete a stamping action.

[0027] Specifically, refer to Figure 1 to Figure 4 As shown, the first reversing gear 510 includes a first connecting portion 511 and a first tooth surface 512, the first connecting portion 511 is connected to the upper part of the first tooth surface 512, the axial diameter of the first connecting portion 511 is larger than the aperture of the guide sleeve 530, and the tooth diameter of the first tooth surface 512 is smaller than the aperture of the guide sleeve 530. The second reversing gear 520 includes a second connecting portion 521 and a second tooth surface 522, the second connecting portion 521 is connected to the lower part of the second tooth surface 522, the axial diameter of the second connecting portion 521 is larger than the aperture of the guide sleeve 530, and the tooth diameter of the second tooth surface 522 is smaller than the aperture of the guide sleeve 530. In this embodiment, the second tooth surface 522 is arranged in the guide sleeve 530 and is located at the lower end of the guide sleeve 530, and the lower end of the second connecting portion 521 is parallel to the pressing plate 110, so that the sheet guided by the pressing plate 110 can smoothly enter the lower part of the second connecting portion 521, thereby preventing the sheet from being offset when the forming convex die 300 and the forming concave die 400 are in contact. When the lower die base 200 is in the downward process, the first connecting portion 511 abuts against the guide sleeve 530, and the first tooth surface 512 enters into the guide sleeve 530, so that the contact action between the adapter 320 and the second reversing gear 520 and the contact action between the adapter 320 and the first reversing gear 510 are completed in the guide sleeve 530, thereby ensuring that no deviation occurs when the convex bump rotates.

[0028] Specifically, refer to Figure 1 to Figure 4As shown, the upper end of the adapter 320 is provided with a first phase meshing tooth surface 323 matched with the first tooth surface 512, and the lower end of the adapter 320 is provided with a second phase meshing tooth surface 324 matched with the second tooth surface 522. In this embodiment, through the cooperation between the first tooth surface 512 and the first phase meshing tooth surface 323, the cooperation between the second tooth surface 522 and the second first phase meshing tooth surface 323 makes the direction of rotation of the first tooth surface 512 when in contact with the first first phase meshing tooth surface 323 and the direction of rotation of the second tooth surface 522 when in contact with the second first phase meshing tooth surface 323 consistent.

[0029] Specifically, refer to Figure 1 to Figure 4As shown, the first tooth surface 512 includes a plurality of first teeth 513, each of which is arranged in an annular array on the first connecting portion 511, and the second tooth surface 522 includes a plurality of second teeth 523, each of which is arranged in an annular array on the second connecting portion 521, and the number of the first teeth 513 and the second teeth 523 is equal, and the first teeth 513 are arranged above the second teeth 523. The first phase tooth surface 323 includes a plurality of first transfer teeth 325, and the second phase tooth surface 324 includes a plurality of second transfer teeth 326, and the first transfer teeth 325 and the second transfer teeth 326 are alternately arranged at the upper and lower ends of the adapter 320. A first driving slope 514 is provided at the bottom end of the first tooth 513, a first driven slope 327 is provided at the top end of the first transfer tooth 325, the first driving slope 514 and the first driven slope 327 are arranged in cooperation with each other, a second driving slope 524 is provided at the top end of the second tooth 523, a second driven slope 328 is provided at the bottom end of the second transfer tooth 326, the second driving slope 524 and the second driven slope 328 are arranged in cooperation with each other, and the first driven slope 327 and the second driven slope 328 are in opposite directions. In this embodiment, before the upper die holder 100 descends, the first tooth 513 and the first transfer tooth 325 cooperate with each other, and the first tooth 513 and the first transfer tooth 325 are arranged alternately. At this time, the second transfer tooth 326 is located directly above the second tooth 523. Then, the upper die holder 100 descends, the first tooth 513 and the first transfer tooth 325 are separated, and then the second tooth 523 and the second transfer tooth 326 are in contact. Under the action of the second driving slope 524 and the second driven slope 328, the forming punch 300 descends and rotates, so that the second transfer tooth 326 and the second tooth 523 cooperate with each other, and the second tooth 523 and the second transfer tooth 326 are arranged alternately. At this time The first tooth 513 is located directly above the first transfer tooth 325. When the forming punch 300 and the forming die 400 complete stamping, the upper die seat 100 moves upward until the first tooth 513 and the first transfer tooth 325 abut against each other. Under the action of the first driving slope 514 and the second driving slope 524, the forming punch 300 rotates while moving upward, and the two rotation directions are consistent, so that during one stamping action, the forming punch 300 completes two rotations, so that forming bulges of different angles can be obtained in continuous stamping, so that there is a gap between the sheets and they will not be adsorbed together, which is convenient for tools such as robot clamps to clamp the sheets, thereby improving production efficiency.

[0030] More specifically, refer to Figure 1 to Figure 4 As shown, by adjusting the number and angle of the gears of the first reversing gear 510, the second reversing gear 520 and the adapter 320, a rotating convex hull of any angle can be obtained.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A boss forming mechanism capable of automatic reversal in a progressive die, comprising an upper die base, a lower die base, a forming convex die and a forming concave die; the upper die base is arranged above the lower die base, the forming concave die is arranged on the upper surface of the lower die base, the forming convex die is arranged on the lower surface of the upper die base, and the forming convex die is arranged above the forming concave die; characterized in that: It also includes a reversing mechanism, which is arranged on the upper die seat, and includes a first reversing gear and a second reversing gear, and the first reversing gear and the second reversing gear are arranged on the upper die seat; the forming punch includes a connecting shaft, an adapter and a punch head; The connecting shaft is rotatably connected to the upper die base, the punch head is arranged below the connecting shaft and faces the forming die, the first reversing gear and the second reversing gear are provided with through holes for the connecting shaft to pass through, and the first reversing gear is located above the second reversing gear, the adapter is arranged on the connecting shaft, and the adapter is located between the first reversing gear and the second reversing gear, the upper end of the adapter is provided with a first driven part corresponding to the first reversing gear, and the lower end of the adapter is provided with a second driven part corresponding to the second reversing gear.

2. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 1, characterized in that: A pressing plate is also provided at the bottom end of the upper die seat. The pressing plate and the bottom end of the second reversing gear are located on the same horizontal plane. The pressing plate is located at the front end of the forming punch and is used to guide the material plate to enter under the forming punch.

3. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 1, characterized in that: The reversing mechanism also includes a guide sleeve, which is arranged on the upper mold base, the first reversing gear is arranged above the guide sleeve, and the second reversing gear is arranged below the guide sleeve; the guide sleeve is used for the adapter to pass through and then cooperate with the first reversing gear or the second reversing gear.

4. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 3, characterized in that: The reversing mechanism also includes a top block and a rectangular spring; the top block is arranged on the upper die seat, and one end of the top block is fixedly connected to the upper die seat, and the other end of the top block is rotatably connected to the connecting shaft; the rectangular spring is sleeved on the connecting shaft, and one end of the rectangular spring is connected to the top block, and the other end is connected to the first reversing gear, and the first reversing gear is slidably arranged on the connecting shaft.

5. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 3, characterized in that: The first reversing gear includes a first connecting portion and a first tooth surface, the first connecting portion is connected above the first tooth surface, the shaft diameter of the first connecting portion is larger than the aperture of the guide sleeve, and the tooth diameter of the first tooth surface is smaller than the aperture of the guide sleeve; the second reversing gear includes a second connecting portion and a second tooth surface, the second connecting portion is connected below the second tooth surface, the shaft diameter of the second connecting portion is larger than the aperture of the guide sleeve, and the tooth diameter of the second tooth surface is smaller than the aperture of the guide sleeve.

6. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 5, characterized in that: The upper end of the adapter is provided with a first meshing tooth surface matched with the first tooth surface, and the lower end of the adapter is provided with a second meshing tooth surface matched with the second tooth surface.

7. The boss forming mechanism capable of automatic reversal in a progressive die according to claim 6, characterized in that: The first tooth surface includes a plurality of first teeth, each of which is arranged in an annular array on the first connecting portion; the second tooth surface includes a plurality of second teeth, each of which is arranged in an annular array on the second connecting portion, and the number of the first teeth is equal to that of the second teeth, and the first teeth are arranged above the second teeth; the first phase tooth surface includes a plurality of first transfer teeth, and the second phase tooth surface includes a plurality of second transfer teeth, and the first transfer teeth and the second transfer teeth are alternately arranged at the upper and lower ends of the adapter; a first driving slope is provided at the bottom end of the first tooth, and a first driven slope is provided at the top end of the first transfer tooth, and the first driving slope and the first driven slope are arranged in cooperation with each other, a second driving slope is provided at the top end of the second tooth, and a second driven slope is provided at the bottom end of the second transfer tooth, and the second driving slope and the second driven slope are arranged in cooperation with each other, and the first driven slope and the second driven slope are in opposite directions.

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