Precision stamping die for sheet metal machining

Abstract

The invention provides a precision stamping die for sheet metal working, and relates to the technical field of stamping dies, the precision stamping die is characterized in that an unloading assembly is slidably mounted on a bottom plate of a lower die, and four vertical top shafts are in through sliding fit with the bottom plate of the lower die; a rectangular supporting frame is fixedly arranged in the middle of the interior of the square supporting frame, three transverse supporting rods are welded and arrayed at the bottom of the rectangular supporting frame, two pushing frames are symmetrically installed on the two transverse supporting rods located on the front outer side and the rear outer side in a sliding mode through spring pushing, each pushing frame is of a U-shaped structure, and the top ends of the pushing frames abut against and make contact with a square holding frame; a rectangular driving frame vertically sliding is installed in the space below the bottom of the rectangular supporting frame, and the rectangular driving frame abuts against and makes contact with the bottom side transverse supporting rod of the pushing frame when sliding upwards. The pushing frame serves as an elastic force output part for ejecting and discharging the formed sheet metal part, is indirectly arranged on the square supporting frame and is not directly integrated on the lower die, and the structure of the lower die is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, and in particular to a precision stamping die for sheet metal processing. Background Art

[0002] The precision stamping die for sheet metal processing is a process equipment specially used to stamp metal sheets into the required shape. This die combines advanced mechanical manufacturing technology and precision processing technology. The die is usually composed of multiple key components, including a square support frame, a vertical support frame, a positioning frame, a sliding shaft, a connecting rod, an L-shaped pedal, a rectangular support frame, a horizontal support rod, a vertical hanging shaft, a push frame, a lower die, a discharge assembly, etc. The lower die is the core part of the die, which is provided with a stamping groove for forming the shape of the sheet metal part. The discharge assembly is used to eject the formed sheet metal part from the lower die after the stamping is completed to ensure the continuity and efficiency of the production process. The die is driven by the stamping machine to place the metal sheet on the lower die, and the relative movement of the upper die and the lower die is used for stamping. During the stamping process, the discharge assembly is separated from the lower die under the push of the spring to ensure the smooth progress of the stamping process.

[0003] The unloading mechanism of existing stamping dies is usually integrated on the lower die, which increases the complexity and weight of the lower die and is not conducive to rapid replacement and maintenance. At the same time, the traditional unloading method mostly relies on manual operation, which is not only laborious, but also significantly increases the fatigue of operators under high-frequency operations, affecting production efficiency and operational safety. Summary of the invention

[0004] In view of this, the present invention provides a precision stamping die for sheet metal processing to solve the problem that the unloading mechanism is usually integrated on the lower die, which increases the complexity and weight of the lower die and is not conducive to rapid replacement and maintenance.

[0005] The technical solution proposed by the present invention is: a precision stamping die for sheet metal processing, specifically comprising: a square support frame, the top end of which is threadedly fastened with a lower die; A discharge assembly is slidably mounted on the bottom plate of the lower die. The discharge assembly is welded together by a square holding frame and four symmetrically arranged vertical top shafts, wherein the four vertical top shafts are slidably fitted through the bottom plate of the lower die, and the push frame is installed by spring push. When the upper die completes a stamping operation and slides away from the lower die, the upper spring can push back to drive its body and the discharge assembly to slide upward, thereby providing a driving force for the discharge assembly to eject and discharge materials. A rectangular support frame is fixedly arranged in the middle of the inner part of the square support frame, and three cross bracing rods are welded and arranged at the bottom of the rectangular support frame, wherein two push-up frames are symmetrically and slidably installed on the two cross bracing rods located at the front and rear outer sides through spring push-up, and the push-up frames are U-shaped, and the top ends are in contact with the square holding frame; A rectangular driving frame that slides vertically up and down is installed in the space below the bottom of the rectangular support frame. When the rectangular driving frame slides upward, it abuts against the bottom cross brace rod of the push frame. Two vertical support frames are symmetrically welded at the bottom of the square support frame, a positioning frame with a U-shaped structure is fixedly arranged between the bottom side parts of the two vertical support frames, two sliding shafts are symmetrically slidably installed on the top longitudinal support rods of the positioning frame, and two connecting rods are connected to the two sliding shafts in a vertically symmetrical rotation manner; An L-shaped pedal is hinged between the tail ends of the two connecting rods at the lower side, and the head ends of the two connecting rods at the upper side are rotatably connected to the rectangular driving frame. The push frame is an elastic force output component for ejecting and unloading the formed sheet metal parts. It is indirectly arranged on the square support frame, not directly integrated on the lower mold, which helps to simplify the structure of the lower mold. The push frame and the unloading assembly are in contact with each other to transmit the driving force. There is no rigid connection between them. The two are relatively independent and can be freely separated and combined. This makes it unnecessary to additionally loosen and tighten the push frame and the unloading assembly when disassembling and replacing the lower mold. When the formed sheet metal part is stuck in the stamping groove of the lower die due to stamping accuracy or other reasons, and cannot be ejected and discharged simply by relying on the springs on the two ejection frames, the rectangular support frame can be used to slide the ejection frame upward to assist in ejecting and discharging the formed sheet metal part; Four connecting rods, two sliding shafts, an L-shaped pedal rod and a T-shaped force transmission rod together form a four-bar linkage that is normally in a diamond shape. Through this four-bar linkage, the L-shaped pedal rod can slide downward to push the T-shaped force transmission rod and the rectangular drive frame to slide upward to assist in pushing the push frame, and the L-shaped pedal rod can be driven by the foot. This allows the auxiliary ejection and unloading operation of sheet metal parts to be driven by foot output, which is more labor-saving than hand output driving, does not occupy both hands, and saves the trouble of bending over and reaching out to grasp the L-shaped pedal rod every time the operation is performed.

[0006] Furthermore, The top end of the rectangular support frame is in abutment with the middle position of the bottom plate of the lower mold, and two groups of vertical connecting plates are symmetrically welded to the left and right ends of the cross support rod. The top ends of the two groups of vertical connecting plates are welded and fixed to the square support frame. The rectangular support frame can support the middle part of the lower mold to avoid the internal space of the square support frame being vacant and lacking support due to the need to install the unloading component, and the middle part of the lower mold cannot be supported, which causes the middle part of the lower mold to be easily deformed by impact or even broken during stamping processing.

[0007] Furthermore, Two vertical hanging shafts are symmetrically welded at the middle position of the bottom of the middle cross bracing rod, and the rectangular driving frame is slidably sleeved and matched with the two vertical hanging shafts.

[0008] Furthermore, A baffle is welded to the top of the vertical top shaft, and four sink grooves are symmetrically opened on the top of the bottom plate of the lower mold. When the unloading assembly slides downward, the baffle is plugged into and matched with the sink groove, so that the bottom plate of the lower mold located in the stamping groove can remain flat, avoiding the baffle protruding from the bottom plate and affecting the stamping processing accuracy.

[0009] Furthermore, Two horizontal bracing connecting rods are welded between the bottom longitudinal bracing plates of the vertical support frame in a front-to-back symmetrical manner, and the two vertical bracing rods of the positioning frame are welded and fixed to the two horizontal bracing connecting rods.

[0010] Furthermore, A T-shaped force transmission rod is welded and hoisted at the middle position inside the rectangular driving frame, and the head ends of the connecting rods at the two upper sides are correspondingly rotatably connected with the bottom ends of the T-shaped force transmission rod.

[0011] Furthermore, A hinge shaft arranged transversely is welded to the top end of the vertical part of the L-shaped pedal rod, and the tail ends of the two connecting rods at the lower side are rotatably connected to the hinge shaft.

[0012] Furthermore, The two push frames are inserted and matched with the rectangular support frame, and are slidably located in the interval space between the rectangular support frame and the square support frame.

[0013] The invention provides a precision stamping die for sheet metal processing, which has the following beneficial effects: In the present invention, the push frame serves as an elastic force output component for ejecting and unloading the formed sheet metal parts. It is indirectly arranged on the square support frame, and is not directly integrated on the lower mold, which helps to simplify the structure of the lower mold. The push frame and the unloading assembly are in contact with each other to transmit the driving force, and there is no rigid connection between them. The two are relatively independent and can be freely separated and combined. This makes it unnecessary to additionally loosen and tighten the push frame and the unloading assembly when disassembling and replacing the lower mold, which helps to simplify the disassembly, assembly and replacement steps of the lower mold, and the operation is convenient and efficient.

[0014] In addition, when the formed sheet metal parts are stuck in the stamping groove of the lower die due to stamping accuracy or other reasons, and cannot be ejected and unloaded simply by relying on the springs on the two push frames, the push frame can be pushed upward by sliding through a rectangular support frame to assist in ejecting and unloading the formed sheet metal parts, thereby preventing the sheet metal parts from being stuck in the stamping groove and being unable or difficult to remove.

[0015] In addition, four connecting rods, two sliding shafts, an L-shaped pedal rod and a T-shaped force transmission rod together form a four-bar linkage that is normally in a diamond shape. Through this four-bar linkage, the L-shaped pedal rod can slide downward to push the T-shaped force transmission rod and the rectangular drive frame to slide upward to assist in pushing the push frame, and the L-shaped pedal rod can be driven by the foot. This allows the auxiliary ejection and unloading operations of sheet metal parts to be driven by foot output, which is more labor-saving than hand output driving, does not occupy both hands, and saves the trouble of bending over and reaching out to grasp the L-shaped pedal rod every time an operation is performed.

[0016] In addition, the rectangular support frame can support the middle part of the lower die, avoiding the internal space of the square support frame being vacant and lacking support due to the need to install the unloading assembly, and failing to provide load-bearing support for the middle part of the lower die. This causes the middle part of the lower die to be easily deformed or even broken during stamping processing, and can provide better impact protection for the lower die. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 The overall front side structural schematic diagram of the present invention is shown; Figure 2 The overall bottom side structural schematic diagram of the present invention is shown; Figure 3 A schematic diagram of the disassembly and separation state of the lower mold of the present invention is shown; Figure 4 A schematic diagram of the lower mold structure of the present invention is shown; Figure 5 A schematic diagram of the push frame structure of the present invention is shown; Figure 6 A schematic diagram of the bottom structure of the push frame of the present invention is shown; Figure 7 A schematic diagram of the rectangular drive frame structure of the present invention is shown; Figure 8 A schematic diagram of the L-shaped pedal structure of the present invention is shown; Reference numerals list 1. Square support frame; 101. Vertical support frame; 102. Positioning frame; 1021. Sliding shaft; 1022. Connecting rod; 103. L-shaped stepping rod; 104. Rectangular support frame; 1041. Horizontal support rod; 1042. Vertical hanging shaft; 105. Pushing frame; 2. Lower mold; 3. Discharging assembly; 301. Vertical top shaft; 4. Rectangular drive frame; 401. T-shaped force transmission rod. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described 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.

[0021] Please refer to Figures 1 to 8 ; Embodiment 1:

[0022] The present invention provides a precision stamping die for sheet metal processing, comprising: a square support frame 1, a vertical support frame 101, a positioning frame 102, a sliding shaft 1021, a connecting rod 1022, an L-shaped pedal rod 103, a rectangular support frame 104, a horizontal support rod 1041, a vertical hanging shaft 1042, a push frame 105, a lower die 2, a discharge assembly 3, a vertical top shaft 301, a rectangular driving frame 4, and a T-shaped force transmission rod 401. The top end of the square support frame 1 is threadedly fastened with the lower die 2; Among them, a discharge assembly 3 is slidably installed on the bottom plate of the lower die 2. The discharge assembly 3 is composed of a square holding frame and four vertical top shafts 301 symmetrically arranged, which are welded together. The four vertical top shafts 301 are slidably matched with the bottom plate of the lower die 2. The discharge assembly 3 is used to eject and discharge the sheet metal parts formed in the stamping groove of the lower die 2; A rectangular support frame 104 is fixedly arranged in the middle position of the inner part of the square support frame 1. Three cross bracing rods 1041 are welded and arranged at the bottom of the rectangular support frame 104. Two push frames 105 are symmetrically and slidably installed on the two cross bracing rods 1041 located at the front and rear outer sides through spring push. The push frames 105 are U-shaped structures, and the top ends are in contact with the square holding frame. The push frames 105 are installed by spring push. When the upper die completes a stamping operation and slides up and separates from the lower die 2, the spring on it can push back to drive its body and the unloading assembly 3 to slide upward, providing the unloading assembly 3 with a driving force for ejecting and unloading. A rectangular driving frame 4 that slides straight up and down is installed in the space below the bottom of the rectangular support frame 104. When the rectangular driving frame 4 slides upward, it abuts against the bottom cross brace rod of the push frame 105. The push frame 105 is an elastic force output component for ejecting and unloading the formed sheet metal parts. It is indirectly arranged on the square support frame 1, and is not directly integrated on the lower mold 2, which helps to simplify the structure of the lower mold 2. The push frame 105 abuts against the unloading component 3 to transmit the driving force, and there is no rigid connection between them. The two are relatively independent and can be freely separated and combined. This makes it unnecessary to additionally loosen and tighten the push frame 105 and the unloading component 3 when disassembling and replacing the lower mold 2, which helps to simplify the disassembly and replacement steps of the lower mold 2, and the operation is convenient and efficient. When the formed sheet metal part is stuck in the stamping groove of the lower die 2 due to stamping accuracy or other reasons, and cannot be ejected and discharged simply by relying on the springs on the two ejection frames 105, the rectangular support frame 104 can be used to slide and push the ejection frame 105 upward to assist in ejecting and discharging the formed sheet metal part, so as to avoid the sheet metal part being stuck in the stamping groove and being unable or difficult to be taken out; Two vertical support frames 101 are symmetrically welded at the bottom of the square support frame 1, and a positioning frame 102 with a U-shaped structure is fixedly arranged between the bottom side parts of the two vertical support frames 101. Two sliding shafts 1021 are symmetrically slidably installed on the top longitudinal support rods of the positioning frame 102, and two connecting rods 1022 are connected to the two sliding shafts 1021 in a vertically symmetrical rotation manner; An L-shaped pedal rod 103 is hinged between the tail ends of the two connecting rods 1022 on the lower side, and the head ends of the two connecting rods 1022 on the upper side are rotatably connected to the rectangular driving frame 4. The four connecting rods 1022, the two sliding shafts 1021, the L-shaped pedal rod 103 and the T-shaped force transmission rod 401 together constitute a four-bar linkage that is normally in a diamond shape. Through this four-bar linkage, the L-shaped pedal rod 103 that slides downward can push the T-shaped force transmission rod 401 and the rectangular driving frame 4 to slide upward to assist in pushing the pushing frame 105, and the L-shaped pedal rod 103 can be driven by the foot, which makes it possible to drive the auxiliary ejection and unloading operation of the sheet metal parts by foot output, which is more labor-saving than hand output driving, does not occupy both hands, and saves the trouble of bending over and reaching out to grasp the L-shaped pedal rod 103 every time an operation is performed.

[0023] Based on the first embodiment, the second embodiment: The top of the rectangular support frame 104 is in contact with the middle position of the bottom plate of the lower mold 2. The rectangular support frame 104 can support the middle part of the lower mold 2 to avoid the internal space of the square support frame 1 being vacant and lacking support due to the need to install the unloading component 3, and the middle part of the lower mold 2 cannot be supported. When used in the stamping process, the middle part of the lower mold 2 is easily deformed or even broken by impact. The lower mold 2 can be better protected against impact. Two groups of vertical connecting plates are symmetrically welded at the left and right ends of the cross support rod 1041, and the top ends of the two groups of vertical connecting plates are welded and fixed to the square support frame 1.

[0024] Preferably, Two vertical hanging shafts 1042 are symmetrically welded at the middle position of the bottom of the middle cross brace 1041 , and the rectangular driving frame 4 is slidably inserted into the two vertical hanging shafts 1042 .

[0025] Preferably, A baffle is welded to the top of the vertical top shaft 301, and four recessed grooves are symmetrically opened on the top of the bottom plate of the lower mold 2. When the upper mold presses downward to push the unloading assembly 3 down, the baffle is plugged into the recessed groove to keep the bottom plate of the lower mold 2 located in the stamping groove flat, avoiding the baffle protruding from the bottom plate and affecting the stamping processing accuracy.

[0026] Preferably, Two horizontal bracing connecting rods are welded between the bottom longitudinal bracing plates of the vertical support frame 101 in a front-to-back symmetrical manner, and the two vertical bracing rods of the positioning frame 102 are welded and fixed to the two horizontal bracing connecting rods.

[0027] Preferably, A T-shaped force transmission rod 401 is welded and hoisted in the middle position inside the rectangular driving frame 4, and the head ends of the two connecting rods 1022 on the upper side are rotatably connected with the bottom ends of the T-shaped force transmission rod 401. Under normal circumstances, the rectangular driving frame 4 remains in a state of use in which it slides down and separates from the top pushing frame 105, and the rectangular driving frame 4 relies on its gravity to slide down and separate from the top pushing frame 105.

[0028] Preferably, A hinge shaft arranged transversely is welded to the top of the vertical part of the L-shaped pedal rod 103, and the tail ends of the two connecting rods 1022 at the lower side are rotatably connected to the hinge shaft.

[0029] Preferably, The two push frames 105 are inserted and matched with the rectangular support frame 104 and are slidably located in the interval space between the rectangular support frame 104 and the square support frame 1.

[0030] Working principle: The unloading assembly 3 is used to eject and unload the sheet metal parts formed in the upper stamping groove of the lower die 2. The push frame 105 is installed by spring push. When the upper die completes a stamping operation and slides away from the lower die 2, the spring on it can push back to drive its body and the unloading assembly 3 to slide upward, providing the unloading assembly 3 with a driving force for ejection and unloading. When the formed sheet metal parts are stuck in the stamping groove of the lower die 2 due to stamping accuracy or other reasons, and cannot be ejected and unloaded simply by relying on the springs on the two push frames 105, the push frame 105 can be pushed upward by the rectangular support frame 104 to assist in ejecting and unloading the formed sheet metal parts. The four connecting rods 1022, the two sliding shafts 1021, the L-shaped pedal rod 103 and the T-shaped force transmission rod 401 together form a four-bar linkage mechanism in a normal state in a diamond shape. Through this four-bar linkage mechanism, the L-shaped pedal rod 103 can slide downward to push the T-shaped force transmission rod 401 and the rectangular driving frame 4 to slide upward to assist the pushing frame 105, and the L-shaped pedal rod 103 can be driven by foot. The rectangular support frame 104 can support the middle part of the lower die 2, so as to avoid the inner space of the square support frame 1 being vacant and lacking support due to the need to install the unloading assembly 3, and the middle part of the lower die 2 cannot be supported, which causes the middle part of the lower die 2 to be easily deformed or even broken during the stamping process; The push frame 105 serves as an elastic force output component for ejecting and unloading the formed sheet metal parts. It is indirectly arranged on the square support frame 1, and is not directly integrated on the lower mold 2, which helps to simplify the structure of the lower mold 2. The push frame 105 and the unloading component 3 are in contact with each other to transmit the driving force. There is no rigid connection between them. The two are relatively independent and can be freely separated and combined. This makes it unnecessary to additionally loosen and tighten the push frame 105 and the unloading component 3 when disassembling and replacing the lower mold 2.

[0031] In this article, there are a few points to note: 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0032] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0033] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A precision stamping die for sheet metal processing, comprising: Square support frame (1), with a lower die (2) threadedly fastened to the top end of the square support frame (1); It is characterized in that a blanking component (3) is slidably installed on the bottom plate of the lower die (2). The blanking component (3) is integrally composed of a square holding frame and four vertically erected top shafts (301) symmetrically arranged, and the four vertically erected top shafts (301) are in sliding fit through the bottom plate of the lower die (2); At the middle position inside the square support frame (1), a rectangular support frame (104) is fixedly arranged. At the bottom of the rectangular support frame (104), three horizontal support rods (1041) are welded in an array. On the two horizontal support rods (1041) located on the front and rear outer sides, two push frames (105) are symmetrically slidably installed by spring pushing. The push frames (105) are of U-shaped structure, and the top ends thereof are in abutting contact with the square holding frame; In the space below the bottom of the rectangular support frame (104), a rectangular driving frame (4) that slides vertically up and down is installed. When the rectangular driving frame (4) slides upward, it is in abutting contact with the bottom cross bar of the push frame (105); Two vertically erected support frames (101) are symmetrically welded to the bottom of the square support frame (1). Between the bottom side parts of the two vertically erected support frames (101), a positioning frame (102) in a U-shaped structure is fixedly arranged. On the top vertical rod of the positioning frame (102), two sliding shafts (1021) are symmetrically slidably installed. On the two sliding shafts (1021), two connecting rods (1022) are symmetrically rotatably connected up and down; An L-shaped stepping rod (103) is hinged between the tails of the two lower connecting rods (1022), and the heads of the two upper connecting rods (1022) are rotatably connected to the rectangular driving frame (4).

2. The precision stamping die for sheet metal processing according to claim 1, characterized in that The top end of the rectangular support frame (104) is in abutting contact with the middle position of the bottom plate of the lower die (2). At the left and right ends of the horizontal support rod (1041), two groups of vertically erected connecting plates are symmetrically welded, and the top ends of the two groups of vertically erected connecting plates are welded and fixed to the square support frame (1).

3. The precision stamping die for sheet metal processing according to claim 2, characterized in that At the middle position of the bottom of the middle horizontal support rod (1041), two vertically erected hanging shafts (1042) are symmetrically welded. The rectangular driving frame (4) is in sliding sleeve fit with the two vertically erected hanging shafts (1042).

4. The precision stamping die for sheet metal processing according to claim 1, characterized in that A retaining disc is welded to the top end of the vertically erected top shaft (301), and four sinking grooves are symmetrically opened at the top end of the bottom plate of the lower die (2). When the blanking component (3) slides downward, the retaining disc is in plug-in fit with the sinking grooves.

5. The precision stamping die for sheet metal processing according to claim 1, characterized in that Two horizontal connecting rods are symmetrically welded between the bottom vertical plates of the vertically erected support frames (101). The two vertical rods of the positioning frame (102) are welded and fixed to the two horizontal connecting rods.

6. The precision stamping die for sheet metal processing according to claim 1, characterized in that A T-shaped force transmission rod (401) is welded and hoisted at the middle position inside the rectangular driving frame (4), and the head ends of the two connecting rods (1022) at the upper side are rotatably connected to the bottom end of the T-shaped force transmission rod (401).

7. A precision stamping die for sheet metal processing according to claim 1, characterized in that: A hinge shaft arranged transversely is welded to the top end of the vertical portion of the L-shaped pedal rod (103), and the tail ends of the two connecting rods (1022) at the lower side are rotatably connected to the hinge shaft.

8. The precision stamping die for sheet metal processing according to claim 1, characterized in that: The two push frames (105) are inserted into and matched with the rectangular support frame (104), and are slidably located in the interval space between the rectangular support frame (104) and the square support frame (1).

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