CN118751800A - A safety protection mechanism for stamping die - Google Patents

Abstract

The present invention belongs to the technical field of stamping dies, and discloses a safety protection mechanism for stamping dies, including a bracket and a hydraulic component installed on the top of the bracket, and also includes: a mold mechanism, which is arranged on the bracket; a lever protection component, which is hinged on the mold mechanism to prevent the operator's hand from penetrating into the mold mechanism; a fixing component, which is used to keep the mold mechanism stable when the mold is closed. The above scheme runs the hydraulic component and drives the convex column 1 to move along the vertical bending part 1 and the horizontal groove 1 in sequence through the elastic limit column and the four-link assembly during the mold opening process, and makes the lower mold and the upper mold misaligned in the vertical direction. At this time, the operator can place the stamped blank on the lower mold. Since the operator's hand is always misaligned with the upper mold in the vertical direction, the problem of the operator's hand failing to leave the mold in time when the upper and lower molds are closed, resulting in a dangerous situation, is solved.

Description

A safety protection mechanism for stamping die

Technical Field

The invention belongs to the technical field of stamping dies, and in particular is a safety protection mechanism for stamping dies.

Background Art

Stamping dies are an indispensable key technology in modern industry. They use the dies on the press to apply pressure to the material to achieve separation or plastic deformation of the material, thereby manufacturing the required parts. For most blanks with special shapes, the operator only needs to clamp the operating blank into the lower die of the stamping die to complete the fixing of the blank. In the process of placing the blank, in order to prevent the operator's hands from being crushed by the upper die, in the prior art, a rotatable baffle and a tooth plate fixed to the bracket are usually set in front of the upper die. When the upper die is stamped downward, the gear at the hinge of the baffle will cooperate with the tooth plate to rotate the baffle, thereby forcing the operator's hand to detach from the part between the upper die and the lower die from the side, thereby protecting the operator's hand. However, since guide pillars are set on both sides of the lower die, when the baffle rotates to force the operator's hand to detach from the die from the side, the guide pillars at this time may block people's hands and cannot detach from the die assembly, thereby causing the upper and lower dies to still cause pressure on people's hands during the mold closing process. In order to solve the above problems, a safety protection mechanism for stamping dies is proposed.

Summary of the invention

In order to solve the problems raised in the above background technology, the present invention provides a safety protection mechanism for a stamping die, which solves the problem that the operator's hands fail to leave the die in time when the upper die and the lower die are closed, thereby causing a dangerous situation.

To achieve the above object, the present invention provides the following technical solution: a safety protection mechanism for a stamping die, comprising a bracket and a hydraulic assembly installed on the top of the bracket, and also comprising:

A mold mechanism, which is arranged on the bracket; a lever protection assembly, which is hinged on the mold mechanism to prevent the operator's hand from penetrating into the mold mechanism; a fixing assembly, which is used to keep the mold mechanism stable when the mold is closed;

The mold mechanism includes a base fixedly connected to the bracket and an upper mold fixedly connected to the output end of the hydraulic component, a lower mold is movably connected inside the base, horizontal grooves 1 and 2 are provided on both sides of the base, convex pillars 1 and 2 that can slide in the horizontal grooves 1 and 2 are fixedly connected on both sides of the lower mold, elastic limiting pillars are fixedly connected on both sides of the upper mold, a four-link assembly is elastically connected on the elastic limiting pillars, the bottom end of the four-link assembly is movably sleeved on the outside of the convex pillar 1, the connecting line at both ends of the four-link assembly is always in an inclined state, the ends of the horizontal grooves 1 and 2 close to the lever protection assembly are respectively connected with the vertical bending part 1 and the vertical bending part 2, and initially, the convex pillars 1 and 2 are respectively at the bottom of the vertical bending part 1 and the vertical bending part 2;

A guide pillar which can be sleeved inside the upper mold is arranged on the top of the base.

Preferably, when the convex pillar 1 and the convex pillar 2 slide into the horizontal groove 1 and the horizontal groove 2 respectively, a gap is left between the bottom of the lower mold and the base;

The lengths of the first vertical bending portion and the second vertical bending portion and the inclination angles of the bending portions are respectively equal.

Preferably, the vertical height of the boss one is higher than that of the boss two, and the end of the horizontal groove two away from the vertical bending portion two is connected to the inclined groove one, and the boss two can slide from the horizontal groove two to the inclined groove one.

Preferably, bending grooves are provided on both sides of the lower mold;

The lever protection assembly includes an arc lever symmetrically hinged on a base, a plurality of blocking rods are fixedly connected between two of the arc levers, a connecting rod is fixedly connected to the hinged end of the arc lever, and a convex shaft that can slide in a bending groove is fixedly connected to the end of the connecting rod away from the hinge with the arc lever.

Preferably, the bending groove comprises a horizontal groove three and an oblique groove two and an oblique groove three respectively connected to two ends of the horizontal groove three;

The length of the second inclined groove in the horizontal direction is equal to the length of the first vertical bending portion and the second vertical bending portion in the horizontal direction.

Preferably, when the convex shaft enters the horizontal groove three from the inclined groove two, the connecting line between the two ends of the arc-shaped lever is in a horizontal state, and a stop rod on the arc-shaped lever away from the connecting rod abuts against the bottom of the lower mold.

Preferably, the length of the horizontal groove three is equal to that of the horizontal groove two; when the convex column two slides from the horizontal groove two into the vertical bending portion two, the convex shaft slides from the horizontal groove three into the inclined groove three.

Preferably, both ends of the upper die are also fixedly connected with an inclined block 1;

The fixing assembly comprises a mounting plate symmetrically and fixedly connected to the side of the base away from the lever protection assembly; an inclined block 2 movably connected to the inner wall of the base near the first end of the vertical bending portion; the mounting plate and the inclined block 2 are connected by an elastic member;

The inclined block can press the top of the second inclined block when it moves downward, so that the second inclined block moves toward the first and second convex pillars as a whole, so that the second inclined block presses and fixes the first and second convex pillars respectively.

Preferably, the inclined block 2 includes inclined plane 1, inclined plane 2 and inclined plane 3 at the top, middle and bottom;

The inclined block 1 cooperates with the inclined surface 1, and when the inclined block 2 moves away from the mounting plate as a whole, the inclined surface 2 and the inclined surface 3 can respectively squeeze the convex column 1 and the convex column 2.

Preferably, sliders are provided at both ends of the elastic member, and the two sliders are movably connected to the mounting plate and the second inclined block respectively;

When the elastic member is in a natural state, the second inclined plane and the third inclined plane are completely separated from the first vertical bending portion and the second vertical bending portion.

Compared with the prior art, the present invention has the following beneficial effects:

The above scheme operates the hydraulic assembly during the mold opening process and drives the boss 1 to move along the vertical bending part 1 and the inside of the horizontal groove 1 in sequence through the elastic limit column and the four-link assembly, thereby driving the lower mold to move and making the lower mold and the upper mold misaligned in the vertical direction. At this time, the operator can place the stamped blank on the lower mold. Since the operator's hand is always misaligned with the upper mold in the vertical direction, the problem of the operator's hand failing to leave the mold in time when the upper and lower molds are closed, which leads to a dangerous situation, is solved.

The above scheme operates the hydraulic assembly to move the upper mold downward during the mold closing process, and pushes the lower mold to move in the opposite direction and reset through the four-bar assembly. When the convex column 1 and the convex column 2 slide from the horizontal groove 1 and the horizontal groove 2 to the vertical bending part 1 and the vertical bending part 2 respectively, the convex shaft slides from the horizontal groove 3 to the inclined groove 2. At this time, the arc lever rotates counterclockwise about the axis and blocks the operator, which further protects people's hands.

The above scheme is implemented by the device that during the mold closing process, when the boss one and the boss two are respectively at the bottom of the vertical bending part one and the vertical bending part two, the hydraulic assembly is operated to make the upper mold continue to move downward and drive the elastic limit column downward, so that the top of the four-bar assembly and the elastic limit column slide relative to each other, and at the same time, the inclined block one will also move downward to squeeze the inclined plane one, thereby forcing the inclined block two to move as a whole away from the elastic member, so that the inclined plane two and the inclined plane three squeeze the boss one and the boss two respectively to achieve the effect of keeping the lower mold stable.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the hydraulic assembly and the mold mechanism of the present invention;

FIG2 is a schematic diagram of the overall structure of the present invention;

FIG3 is a schematic structural diagram of a four-bar linkage assembly according to the present invention;

FIG4 is a schematic structural diagram of the mold mechanism of the present invention when it is opened;

FIG5 is an enlarged view of point A in FIG4 ;

FIG6 is an enlarged view of point B in FIG4;

FIG7 is a schematic side cross-sectional view of the fixing assembly of the present invention;

FIG8 is a schematic diagram of the side structure of the mold mechanism of the present invention when it is working.

In the figure: 1, bracket; 2, hydraulic assembly; 3, mold mechanism; 31, base; 311, horizontal groove 1; 3111, vertical bending part 1; 312, horizontal groove 2; 3121, vertical bending part 2; 3122, inclined groove 1; 313, guide pillar; 32, lower mold; 321, convex column 1; 322, convex column 2; 323, bending groove; 3231, inclined groove 2; 3232, horizontal Slot three; 3233, inclined slot three; 33, upper mold; 331, elastic limit column; 332, inclined block one; 34, four-link assembly; 4, lever protection assembly; 41, arc lever; 411, stop rod; 42, connecting rod; 421, cam; 5, fixing assembly; 51, mounting plate; 52, elastic member; 53, inclined block two; 531, inclined plane one; 532, inclined plane two; 533, inclined plane three.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in FIGS. 1 to 8 , the present invention provides a safety protection mechanism for a stamping die, comprising a bracket 1 and a hydraulic assembly 2 mounted on the top of the bracket 1, and further comprising: a die mechanism 3, which is arranged on the bracket 1; a lever protection assembly 4, which is hinged on the die mechanism 3 to prevent the operator's hand from penetrating into the die mechanism 3; a fixing assembly 5, which is used to keep the die mechanism 3 stable when the die is closed;

The mold mechanism 3 includes a base 31 fixedly connected to the bracket 1 and an upper mold 33 fixedly connected to the output end of the hydraulic assembly 2. The base 31 is movably connected to the lower mold 32. Both sides of the base 31 are provided with a horizontal groove 1 311 and a horizontal groove 2 312. Both sides of the lower mold 32 are fixedly connected with a convex column 1 321 and a convex column 2 322 that can slide in the horizontal groove 1 311 and the horizontal groove 2 312. Both sides of the upper mold 33 are fixedly connected with elastic limiting columns 331. A four-link assembly 34 is elastically connected, and the bottom end of the four-link assembly 34 is movably sleeved outside the convex column 1 321. The connection line between the two ends of the four-link assembly 34 is always in an inclined state. The ends of the horizontal groove 1 311 and the horizontal groove 2 312 close to the lever protection assembly 4 are respectively connected with the vertical bending part 1 3111 and the vertical bending part 2 3121. Initially, the convex column 1 321 and the convex column 2 322 are respectively at the bottom of the vertical bending part 1 3111 and the vertical bending part 2 3121.

A guide support column 313 is provided on the top of the base 31 and can be sleeved inside the upper mold 33;

By adopting the above scheme, during the mold opening process, the hydraulic component 2 is operated by the device and the boss 321 is driven to move along the vertical bending part 3111 and the horizontal groove 311 in sequence through the elastic limit column 331 and the four-bar assembly 34, thereby driving the lower mold 32 to move, and making the lower mold 32 and the upper mold 33 misaligned in the vertical direction. At this time, the operator can place the stamped blank on the lower mold 32. Since the operator's hand is always misaligned with the upper mold 33 in the vertical direction, the problem of the operator's hand failing to leave the mold in time when the upper mold 33 and the lower mold 32 are closed, thereby solving the problem of dangerous conditions caused by the operator's hand failing to leave the mold in time.

As shown in FIG. 1-8 , when the first convex column 321 and the second convex column 322 slide into the first horizontal groove 311 and the second horizontal groove 312 respectively, a gap is left between the bottom of the lower mold 32 and the base 31 ;

The lengths of the vertical bending portion 1 3111 and the vertical bending portion 2 3121 and the inclination angles of the bending portions are respectively equal;

The vertical height of the first convex column 321 is higher than that of the second convex column 322. The end of the second horizontal groove 312 away from the second vertical bending portion 3121 is connected to the first oblique groove 3122. The second convex column 322 can slide from the second horizontal groove 312 to the first oblique groove 3122.

By adopting the above scheme, during the upward movement of the boss 1 321 and the boss 2 322, since the lengths of the vertical bending portion 1 3111 and the vertical bending portion 2 3121 and the inclination angles of the bending portions are respectively equal, it is ensured that the lower mold 32 always maintains a horizontal state during the upward movement.

As shown in Fig. 1-8, bending grooves 323 are provided on both sides of the lower mold 32; the lever protection assembly 4 includes an arc lever 41 symmetrically hinged on the base 31, a plurality of blocking rods 411 are fixedly connected between the two arc levers 41, a connecting rod 42 is fixedly connected to the hinged end of the arc lever 41, and a convex shaft 421 that can slide in the bending groove 323 is fixedly connected to the end of the connecting rod 42 away from the hinged end of the arc lever 41;

The bending groove 323 includes a horizontal groove 3232 and an oblique groove 2 3231 and an oblique groove 3 3233 respectively connected to two ends of the horizontal groove 3232;

The length of the second inclined groove 3231 in the horizontal direction is equal to the length of the first vertical bending portion 3111 and the second vertical bending portion 3121 in the horizontal direction respectively;

When the convex shaft 421 enters the horizontal groove 3232 from the oblique groove 2 3231, the connecting line of the two ends of the arc-shaped lever 41 is in a horizontal state, and a stopper 411 on the arc-shaped lever 41 away from the connecting rod 42 abuts against the bottom of the lower mold 32; the length of the horizontal groove 3232 is equal to the length of the horizontal groove 2 312; when the convex column 322 slides from the horizontal groove 2 312 into the vertical bending part 2 3121, the convex shaft 421 slides from the horizontal groove 3232 into the oblique groove 3233;

By adopting the above scheme, during the mold closing process, the hydraulic assembly 2 is operated to make the upper mold 33 move downward, and the lower mold 32 is pushed to move in the opposite direction and reset through the four-bar assembly 34. When the boss 1 321 and the boss 2 322 slide from the horizontal groove 1 311 and the horizontal groove 2 312 to the vertical bending part 1 3111 and the vertical bending part 2 3121 respectively, the convex shaft 421 will slide from the horizontal groove 3232 to the inclined groove 2 3231. At this time, the arc-shaped lever 41 will rotate counterclockwise about the axis and block the operator, further playing a protective role for people's hands.

As shown in FIGS. 2-5 and 7, the upper mold 33 is also fixedly connected with an inclined block 1 332 at both ends; the fixing assembly 5 includes a mounting plate 51 symmetrically and fixedly connected to the side of the base 31 away from the lever protection assembly 4; an inclined block 2 53 movably connected to the inner wall of the base 31 near the end of the vertical bending portion 1 3111; the mounting plate 51 and the inclined block 2 53 are connected by an elastic member 52; the inclined block 1 332 can press the top of the inclined block 2 53 downward and make the inclined block 2 53 move toward the convex column 1 321 and the convex column 2 322 as a whole, so that the inclined block 2 53 squeezes and fixes the convex column 1 321 and the convex column 2 322 respectively;

The second inclined block 53 includes an inclined surface 1 531, an inclined surface 2 532 and an inclined surface 3 533 at the top, middle and bottom;

The inclined block 1 332 cooperates with the inclined surface 1 531, and when the inclined block 2 53 moves away from the mounting plate 51 as a whole, the inclined surface 2 532 and the inclined surface 3 533 can respectively squeeze the boss 1 321 and the boss 2 322;

By adopting the above scheme, during the mold closing process, when the boss 1 321 and the boss 2 322 are respectively at the bottom of the vertical bending part 1 3111 and the vertical bending part 2 3121, the hydraulic assembly 2 is operated to make the upper mold 33 continue to move downward and drive the elastic limiting column 331 downward, so that the top of the four-bar assembly 34 and the elastic limiting column 331 slide relative to each other, and at the same time, the inclined block 1 332 will also move downward to squeeze the inclined surface 1 531, thereby forcing the inclined block 2 53 to move as a whole away from the elastic member 52, so that the inclined surface 2 532 and the inclined surface 3 533 respectively squeeze the boss 1 321 and the boss 2 322 to achieve the effect of keeping the lower mold 32 stable.

As shown in FIGS. 5 and 7 , sliders are provided at both ends of the elastic member 52 , and the two sliders are movably engaged in the mounting plate 51 and the second inclined block 53 ;

When the elastic member 52 is in a natural state, the second inclined surface 532 and the third inclined surface 533 are completely separated from the first vertical bending portion 3111 and the second vertical bending portion 3121;

By adopting the above scheme, sliders are provided at both ends of the elastic member 52, thereby facilitating the operator to replace the damaged elastic member 52; when the inclined block 1 332 has not yet contacted the top of the inclined block 2 53, since the inclined surface 2 532 and the inclined surface 3 533 are completely separated from the vertical bending portion 1 3111 and the vertical bending portion 2 3121, it is avoided that the boss 1 321 and the boss 2 322 are blocked by the inclined surface 2 532 and the inclined surface 3 533 respectively during the resetting process and cannot be reset.

The working principle and use process of the present invention:

When the mold is opened, the hydraulic assembly 2 is operated to drive the upper mold 33 upward, thereby driving the elastic limiting column 331 upward. At this time, due to the tension of the tension spring on the elastic limiting column 331, the top of the four-link assembly 34 will maintain a constant vertical height. When the lower surface of the top of the four-link assembly 34 contacts the bottom of the elastic limiting column 331, the inclined surface 1 531 is separated from the extrusion of the inclined block 2 53, so that the inclined block 2 53 is reset by the tension of the elastic member 52;

Then, the upper die 33 moves upward, and the boss 1 321 moves along the vertical bending portion 1 3111 and the horizontal groove 1 311 in sequence through the elastic limiting column 331 and the four-bar assembly 34, thereby driving the lower die 32 to move, and making the lower die 32 and the upper die 33 misaligned in the vertical direction. At this time, the operator can place the blank with stamping on the lower die 32;

When the boss 1 321 slides to the end of the horizontal groove 1 311, the boss 2 322 slides from the horizontal groove 2 312 to the inclined groove 1 3122, so that the lower mold 32 as a whole rotates around the boss 1 321 as the axis during the movement;

At the same time, when the convex column 1 321 and the convex column 2 322 respectively move upward from the bottom of the vertical bending part 1 3111 and the vertical bending part 2 3121 to the top, the lower mold 32 will also move upward, so that the convex shaft 421 slides along the inclined groove 2 3231. When the convex shaft 421 slides into the horizontal groove 3232, the connecting line of the two ends of the arc-shaped lever 41 is horizontal, and the blocking rod 411 supports the lower mold 32. When the convex shaft 421 slides from the horizontal groove 3232 to the inclined groove 3233, the blocking rod 411 will continue to rotate with the arc-shaped lever 41 and continue to support the lower mold 32.

When the mold is closed, the operation of the hydraulic assembly 2 will cause the upper mold 33 to move downward, and push the lower mold 32 to move in the opposite direction and reset through the four-bar assembly 34. When the convex column 1 321 and the convex column 2 322 slide from the horizontal groove 1 311 and the horizontal groove 2 312 to the vertical bending part 1 3111 and the vertical bending part 2 3121 respectively, the convex shaft 421 will slide from the horizontal groove 3232 to the inclined groove 2 3231. At this time, the arc lever 41 will rotate counterclockwise about the axis and block the operator.

When the boss 1 321 and the boss 2 322 are respectively at the bottom of the vertical bending portion 1 3111 and the vertical bending portion 2 3121, the upper mold 33 continues to move downward and drives the elastic limiting column 331 downward, so that the top of the four-bar assembly 34 and the elastic limiting column 331 slide relative to each other, and at the same time, the inclined block 1 332 also moves downward to squeeze the inclined plane 1 531, thereby forcing the inclined block 2 53 to move as a whole away from the elastic member 52, so that the inclined plane 2 532 and the inclined plane 3 533 squeeze the boss 1 321 and the boss 2 322 respectively to achieve the effect of keeping the lower mold 32 stable.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A safety protection mechanism for a stamping die, comprising a bracket (1) and a hydraulic assembly (2) mounted on the top of the bracket (1), characterized in that it also comprises: A mold mechanism (3) disposed on the support (1); A lever protection assembly (4) is hinged to the mold mechanism (3) and is used to prevent an operator's hand from penetrating into the mold mechanism (3); A fixing assembly (5) for maintaining the stability of the mold mechanism (3) during mold closing; The mold mechanism (3) comprises a base (31) fixedly connected to the bracket (1) and an upper mold (33) fixedly connected to the output end of the hydraulic assembly (2); a lower mold (32) is movably connected inside the base (31); a horizontal groove 1 (311) and a horizontal groove 2 (312) are provided on both sides of the base (31); a convex column 1 (321) and a convex column 2 (322) are fixedly connected on both sides of the lower mold (32) and are capable of sliding in the horizontal groove 1 (311) and the horizontal groove 2 (312); elastic limiters are fixedly connected on both sides of the upper mold (33) A column (331), the elastic limiting column (331) is elastically connected to a four-link assembly (34), the bottom end of the four-link assembly (34) is movably sleeved outside the convex column (321), the ends of the horizontal groove (311) and the horizontal groove (312) close to the lever protection assembly (4) are respectively connected to the vertical bending part (3111) and the vertical bending part (3121), and initially, the convex column (321) and the convex column (322) are respectively at the bottom of the vertical bending part (3111) and the vertical bending part (3121); A guide pillar (313) capable of being sleeved inside the upper mold (33) is provided on the top of the base (31). 2. The safety protection mechanism for a stamping die according to claim 1, characterized in that: when the convex column 1 (321) and the convex column 2 (322) slide into the horizontal groove 1 (311) and the horizontal groove 2 (312) respectively, a gap is left between the bottom of the lower die (32) and the base (31); The lengths of the vertical bending portion 1 (3111) and the vertical bending portion 2 (3121) and the inclination angles of the bending portions are respectively equal. 3. The safety protection mechanism for a stamping die according to claim 2 is characterized in that: the vertical height of the convex column 1 (321) is higher than that of the convex column 2 (322), and the end of the horizontal groove 2 (312) away from the vertical bending portion 2 (3121) is connected to the inclined groove 1 (3122), and the convex column 2 (322) can slide from the horizontal groove 2 (312) to the inclined groove 1 (3122). 4. The safety protection mechanism for a stamping die according to claim 1, characterized in that: bending grooves (323) are provided on both sides of the lower die (32); The lever protection assembly (4) comprises an arcuate lever (41) symmetrically hinged on the base (31), a plurality of blocking rods (411) being fixedly connected between two of the arcuate levers (41), a connecting rod (42) being fixedly connected to the hinged end of the arcuate lever (41), and a convex shaft (421) capable of sliding in a bending groove (323) being fixedly connected to one end of the connecting rod (42) away from the hinged end of the arcuate lever (41). 5. The safety protection mechanism for a stamping die according to claim 4, characterized in that: the bending groove (323) comprises a horizontal groove three (3232) and an inclined groove two (3231) and an inclined groove three (3233) respectively connected to two ends of the horizontal groove three (3232); The length of the second inclined groove (3231) in the horizontal direction is equal to the length of the first vertical bending portion (3111) and the second vertical bending portion (3121) in the horizontal direction. 6. The safety protection mechanism for a stamping die according to claim 5 is characterized in that when the convex shaft (421) enters the horizontal groove (3232) from the second inclined groove (3231), the connecting line of the two ends of the arc-shaped lever (41) is in a horizontal state, and a blocking rod (411) on the arc-shaped lever (41) away from the connecting rod (42) abuts against the bottom of the lower die (32). 7. The safety protection mechanism for a stamping die according to claim 6, characterized in that: the length of the horizontal groove three (3232) is equal to the length of the horizontal groove two (312); When the second protruding column (322) slides from the second horizontal groove (312) into the second vertical bending portion (3121), the protruding shaft (421) slides from the third horizontal groove (3232) into the third inclined groove (3233). 8. The safety protection mechanism for a stamping die according to claim 1, characterized in that: both ends of the upper die (33) are also fixedly connected with an inclined block 1 (332); The fixing assembly (5) comprises a mounting plate (51) symmetrically and fixedly connected to a side of the base (31) away from the lever protection assembly (4); A second inclined block (53) movably connected to an end of the inner wall of the base (31) close to the first vertical bending portion (3111); The mounting plate (51) and the second inclined block (53) are connected via an elastic member (52); The downward movement of the inclined block 1 (332) can squeeze the top of the inclined block 2 (53) and make the inclined block 2 (53) move toward the convex column 1 (321) and the convex column 2 (322) as a whole, so that the inclined block 2 (53) squeezes and fixes the convex column 1 (321) and the convex column 2 (322) respectively. 9. The safety protection mechanism for a stamping die according to claim 8, characterized in that: the second inclined block (53) comprises a first inclined surface (531) at the top, a second inclined surface (532) in the middle, and a third inclined surface (533) at the bottom; The inclined block 1 (332) cooperates with the inclined surface 1 (531), and when the inclined block 2 (53) as a whole moves away from the mounting plate (51), the inclined surface 2 (532) and the inclined surface 3 (533) can respectively squeeze the convex column 1 (321) and the convex column 2 (322). 10. The safety protection mechanism for a stamping die according to claim 9, characterized in that: sliders are provided at both ends of the elastic member (52), and the two sliders are movably engaged in the mounting plate (51) and the second inclined block (53) respectively; When the elastic member (52) is in a natural state, the second inclined surface (532) and the third inclined surface (533) are completely separated from the first vertical bending portion (3111) and the second vertical bending portion (3121).