Stamping device for automobile heat shield die machining

Abstract

The invention discloses a stamping device for automobile heat shield die machining, and relates to the technical field of stamping forming. The invention discloses a lower die, an upper die, a magnetic suction feeding mechanism, a closed-loop stamping mechanism, a synchronous shearing mechanism, a bidirectional ejection mechanism and the like. The magnetic driving roller and the magnetic driven roller realize high-precision feeding; the first force sensitive resistor, the second force sensitive resistor and the PLC control circuit monitor stamping pressure in real time and automatically switch positive and negative rotation; the material cutting blade is matched with the material cutting groove under the driving of the cross-shaped lower pressing plate, so that stamping and shearing are synchronously completed; and the top discharging ejector rod and the bottom discharging convex shaft cooperate for ejection, and it is guaranteed that a workpiece is demolded completely.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping forming, and particularly to a stamping device for processing an automobile heat shield mold. Background Art

[0002] In the existing automobile heat shield stamping production line, the sheet metal usually first completes primary forming - blank holding, and then undergoes secondary blanking through an independent punching die, or relies on manual trimming to remove the surplus material. Although this process can complete the separation of the part shape, there are the following prominent problems: redundant working steps and limited production rhythm: additional stations and clamping and positioning are required for secondary punching or manual trimming, resulting in the overall production line rhythm being limited by the slowest process and low comprehensive efficiency. Burrs and material pulling are difficult to control: during secondary shearing, large burrs are easily generated due to punching clearance, cutting edge wear or manual positioning errors, and even the metal fibers may be stretched and implicated, requiring subsequent deburring, which further increases time and cost. Poor dimensional consistency: manual trimming depends on the operator's experience, and it is difficult to guarantee the repeated accuracy; even if secondary punching is used, due to the re - positioning error and springback of the sheet metal, the dispersion of the part contour dimensions is relatively large. Safety hazards and labor intensity: manual trimming requires contact with sharp edges, posing a risk of cutting; at the same time, high - intensity manual work is prone to fatigue and difficult to meet the requirements of modern safe production. Summary of the Invention

[0003] To overcome the defects of the above - mentioned prior art, the present invention provides the following technical solution: a stamping device for processing an automobile heat shield mold, including a lower mold and an upper mold. A groove for forming is provided on the lower mold, and a protrusion adapted to the groove on the lower mold is provided on the upper mold. The groove on the lower mold and the protrusion on the upper mold are used for forming the automobile heat shield. The upper mold is fixedly installed on the upper mold support plate. Four cutting edge support sliding rods are slidably installed on the upper mold support plate along the direction of gravity. A cutting edge is fixedly installed at the bottom ends of the four cutting edge support sliding rods. The cutting edge is slidably embedded in the upper mold. Among them, a cutting groove in contact and cooperation with the cutting edge is provided on the upper surface of the lower mold. The cutting edge and the cutting groove form a shearing part, and the shearing part is used for separating the formed automobile heat shield from the sheet metal. A top blanking ejector rod is slidably inserted and matched along the direction of gravity at the central positions of the upper mold support plate and the upper mold. The bottom end of the top blanking ejector rod is flush with the lower surface of the protrusion of the upper mold. A bottom blanking convex shaft is slidably inserted along the direction of gravity at the central position of the lower mold. The top blanking ejector rod or the bottom blanking convex shaft is used for separating the formed automobile heat shield from the upper mold or the lower mold.

[0004] Preferably, the lower die is fixedly installed on the bottom plate in an overhead manner. A feeding seat is also fixedly installed on the bottom plate. Two symmetrically arranged feeding roller brackets are fixedly installed on the feeding seat. A magnetic active feeding roller is rotatably installed between the two feeding roller brackets. The circumference of the magnetic active feeding roller is tangent to the side plane where the upper surface of the lower die is located. Passive feeding roller chutes are formed on both of the two feeding roller brackets. A magnetic passive feeding roller is magnetically coupled above the magnetic active feeding roller. The two ends of the magnetic passive feeding roller are slidably and rotatably installed in the passive feeding roller chutes. A feeding motor is fixedly installed on one of the feeding roller brackets. The output shaft of the feeding motor is fixedly coupled with the magnetic active feeding roller.

[0005] Preferably, four guiding slide rods are fixedly installed on the upper die support plate. Limit rings are fixedly installed at the tops of the four guiding slide rods. The tops of the four cutting edge support slide rods extend above the upper die support plate, and the tops of the four cutting edge support slide rods are fixedly coupled with a cross-shaped lower pressing plate. The cross-shaped lower pressing plate is slidably coupled with the guiding slide rods. A cross-shaped lower pressing plate return spring is elastically arranged at the central position between the opposite surfaces of the cross-shaped lower pressing plate and the upper die support plate. The two ends of the cross-shaped lower pressing plate return spring are fixed to the cross-shaped lower pressing plate and the upper die support plate.

[0006] Preferably, the four guiding slide rods are all slidably installed on the driving lifting plate. The four guiding slide rods are slidably coupled with the driving lifting plate along the direction of gravity. Among them, the top blanking ejector rod passes through the cross-shaped lower pressing plate and the driving lifting plate, and the top blanking ejector rod is slidably coupled with both the cross-shaped lower pressing plate and the driving lifting plate. Among them, the cross-shaped lower pressing plate return spring is wound around the top blanking ejector rod. A top blanking ejector rod return spring is sleeved around the top of the top blanking ejector rod. The two ends of the top blanking ejector rod return spring are fixed to the top of the top blanking ejector rod and the driving lifting plate. Four upper die pressing springs are elastically installed between the driving lifting plate and the upper die support plate. Exhaust holes are arranged at the positions of the cutting edges on the upper die support plate.

[0007] Preferably, a top support plate is fixedly installed above the bottom plate in an overhead manner through a support side plate frame. A control motor is fixedly installed on the top support plate. A lead screw is fixedly installed on the output shaft of the control motor. A nut plate is threadedly sleeved on the lead screw. Four stamping slide rods are fixedly installed on the nut plate. The four stamping slide rods are slidably inserted into the top support plate along the direction of gravity.

[0008] Preferably, the bottom ends of the four stamping slide rods are fixedly fitted with the driving lifting plate; a blanking C-shaped frame is slidably mounted on the outer surface of the lower die, wherein the driving lifting plate is in contact and fit with the top of the blanking C-shaped frame, and a through hole through which the top blanking ejector rod return spring can pass is provided at the top of the blanking C-shaped frame; a blanking lifting plate is fixedly installed at the bottom end of the blanking C-shaped frame, a bottom ejector rod is fixedly installed on the blanking lifting plate, the bottom ejector rod is fixedly fitted with the bottom blanking convex shaft, a cylindrical concave space is provided at the central position of the lower surface of the bottom blanking convex shaft, a spring support is arranged in the cylindrical concave space, the spring support surrounds the bottom ejector rod, a spring is fixedly installed at the bottom end of the spring support, the spring is fixed on the lower surface of the lower die, the top end of the spring support is fixed to the bottom blanking convex shaft, and a limiting skirt is further provided at the bottom edge of the bottom blanking convex shaft, and the limiting skirt is in contact and fit with the lower surface of the lower die.

[0009] Preferably, a first force-sensitive resistor is arranged at the edge position of the surface of the lower die facing the upper die, the first force-sensitive resistor is in contact and fit with the edge of the lower surface of the upper die, a second force-sensitive resistor is arranged on the upper surface of the blanking C-shaped frame, the second force-sensitive resistor is in contact and fit with the lower surface of the top support plate, and a gap is provided between the blanking C-shaped frame and the top support plate.

[0010] Preferably, the first force-sensitive resistor, the second force-sensitive resistor and the fixed-value resistor R1 are connected in series to a 3V DC power supply. The parameters of the first force-sensitive resistor and the second force-sensitive resistor are the same. The potential between the first force-sensitive resistor and the fixed-value resistor R1 is 1V. When no pressure is applied to the first force-sensitive resistor and the second force-sensitive resistor, the potential difference across both the first force-sensitive resistor and the second force-sensitive resistor is 0.5V.

[0011] Preferably, a control part is connected in parallel to both ends of the first force-sensitive resistor and both ends of the second force-sensitive resistor. The control part includes an NPN transistor. The base of the NPN transistor is electrically connected to the high-potential point of the corresponding force-sensitive resistor. The emitter of the NPN transistor is electrically connected to the low-potential point of the corresponding force-sensitive resistor. And the emitter, collector of the NPN transistor and the corresponding relay coil are connected in series to a 12V DC power supply; the relays in the control parts corresponding to the first force-sensitive resistor and the second force-sensitive resistor are KM1 and KM2 respectively; KM1 and KM2 are used to control the forward and reverse rotation of the output shaft of the control motor.

[0012] The present invention has the following beneficial effects compared with the prior art: (1) The synchronous shearing mechanism composed of the cutting edge support slide bar - cross-shaped lower pressing plate - cutting edge - cutting groove in the present invention can cut the contour of the workpiece at one time while completing the forming in the main stroke, without the need for a secondary blanking process; the cutting edge is ensured of translational accuracy by the guiding slide bar, and the return spring rebounds in time, avoiding the edge burr or material pulling phenomenon caused by the repeated tool setting of the conventional blanking blade; (2) The present invention forms a logical control with the KM1 and KM2 relays and the PLC through the dual-channel pressure detection circuit composed of the first and second force-sensitive resistors, so that the stamping stroke can automatically reverse after detecting that the forming pressure meets the standard; at the same time, an upper limit feedback is applied to the unloading stroke to avoid early failure of the mold due to excessive pressure or poor forming due to insufficient pressure; (3) The present invention adopts a two-way ejection structure of the top blanking ejector rod + bottom blanking convex shaft + tension spring bracket, and the upper and lower dies can eject the workpiece independently or synchronously; even if the workpiece is stuck due to local springback, it can be smoothly ejected, not only eliminating the risk of scratching caused by manual prying of the mold, but also preventing the thin-walled heat shield from deforming due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 for the present invention Figure 1 is a schematic diagram of the structure at position A in Figure 3 is a schematic diagram of the structure at the magnetic active feed roller of the present invention; Figure 4 is a schematic diagram of the structure of the blanking C-shaped frame of the present invention; Figure 5 for the present invention Figure 4 is a schematic diagram of the structure at position B in Figure 6 is a schematic diagram of the structure of the lower die of the present invention; Figure 7 is a schematic diagram of the structure of the upper die of the present invention; Figure 8 is a schematic diagram of the principle of the movement limit of the upper die of the present invention.

[0014] In the figure: 101 - bottom plate; 102 - feeding seat; 103 - supporting side plate frame; 104 - top supporting plate; 105 - stamping slide bar; 106 - control motor; 107 - nut plate; 108 - lead screw; 109 - feeding roller bracket; 110 - magnetic passive feeding roller; 111 - magnetic active feeding roller; 112 - passive feeding roller chute; 113 - feeding motor; 114 - limiting skirt; 115 - blanking C-shaped frame; 116 - blanking lifting plate; 117 - lower die; 118 - bottom blanking convex shaft; 119 - cutting slot; 120 - bottom ejector rod; 121 - tension spring; 122 - tension spring bracket; 123 - upper die supporting plate; 124 - upper die; 125 - top blanking ejector rod; 126 - cutting edge; 127 - cutting edge supporting slide bar; 128 - cross-shaped lower pressing plate; 129 - guiding slide bar; 130 - limiting ring; 131 - top blanking ejector rod return spring; 132 - cross-shaped lower pressing plate return spring; 133 - driving lifting plate; 134 - upper die downward pressing spring; 135 - exhaust hole. Detailed implementation manners

[0015] The following is combined with the attached Figures 1 - 8 drawings, and the technical solutions of the present invention will be further described through specific implementation manners.

[0016] The present invention provides a stamping device for processing an automobile heat shield mold, including a lower die 117 and an upper die 124. A groove for forming is provided on the lower die 117, and a protrusion adapted to the groove on the lower die 117 is provided on the upper die 124. The groove on the lower die 117 and the protrusion on the upper die 124 are used for forming an automobile heat shield; the upper die 124 is fixedly installed on the upper die supporting plate 123. Four cutting edge supporting slide bars 127 are slidably installed on the upper die supporting plate 123 along the gravity direction. A cutting edge 126 is fixedly installed at the bottom ends of the four cutting edge supporting slide bars 127. The cutting edge 126 is slidably embedded in the upper die 124. A cutting slot 119 in contact and cooperation with the cutting edge 126 is provided on the upper surface of the lower die 117. The cutting edge 126 and the cutting slot 119 form a shearing part, and the shearing part is used for separating the formed automobile heat shield from the sheet material; a top blanking ejector rod 125 is slidably inserted and matched along the gravity direction at the central positions of the upper die supporting plate 123 and the upper die 124. The bottom end of the top blanking ejector rod 125 is flush with the lower surface of the protrusion of the upper die 124. A bottom blanking convex shaft 118 is slidably inserted and arranged along the gravity direction at the central position of the lower die 117. The top blanking ejector rod 125 or the bottom blanking convex shaft 118 is used for separating the formed automobile heat shield from the upper die 124 or the lower die 117.

[0017] The lower die 117 is fixedly installed on the bottom plate 101 in an overhead manner. A feed base 102 is also fixedly installed on the bottom plate 101. Two symmetrically arranged feed roller brackets 109 are fixedly installed on the feed base 102. A magnetic active feed roller 111 is rotatably installed between the two feed roller brackets 109. The circumference of the magnetic active feed roller 111 is tangent to the side plane where the upper surface of the lower die 117 is located. Passive feed roller chutes 112 are provided on both of the two feed roller brackets 109. A magnetic passive feed roller 110 is magnetically attracted and fitted above the magnetic active feed roller 111. The two ends of the magnetic passive feed roller 110 are slidably and rotatably installed in the passive feed roller chutes 112. A feed motor 113 is fixedly installed on one of the feed roller brackets 109. The output shaft of the feed motor 113 is fixedly fitted with the magnetic active feed roller 111.

[0018] Four guiding slide rods 129 are fixedly installed on the upper die support plate 123. Limit rings 130 are fixedly installed at the tops of the four guiding slide rods 129. The tops of the four cutting edge support slide rods 127 extend above the upper die support plate 123, and the tops of the four cutting edge support slide rods 127 are fixedly fitted with a cross-shaped lower pressing plate 128. The cross-shaped lower pressing plate 128 is slidably fitted with the guiding slide rods 129. A cross-shaped lower pressing plate return spring 132 is elastically arranged at the central position between the opposite surfaces of the cross-shaped lower pressing plate 128 and the upper die support plate 123. The two ends of the cross-shaped lower pressing plate return spring 132 are fixed to the cross-shaped lower pressing plate 128 and the upper die support plate 123. The four guiding slide rods 129 are all slidably installed on a driving lifting plate 133. The four guiding slide rods 129 are slidably fitted with the driving lifting plate 133 along the direction of gravity. Among them, the top blanking ejector rod 125 passes through the cross-shaped lower pressing plate 128 and the driving lifting plate 133, and the top blanking ejector rod 125 is slidably fitted with both the cross-shaped lower pressing plate 128 and the driving lifting plate 133. Among them, the cross-shaped lower pressing plate return spring 132 is arranged around the top blanking ejector rod 125. A top blanking ejector rod return spring 131 is sleeved around the top of the top blanking ejector rod 125. The two ends of the top blanking ejector rod return spring 131 are fixed to the top end of the top blanking ejector rod 125 and the driving lifting plate 133. Four upper die downward pressing springs 134 are elastically installed between the driving lifting plate 133 and the upper die support plate 123. Exhaust holes 135 are provided at the positions of the cutting edges 126 on the upper die support plate 123.

[0019] Above the bottom plate 101, a top support plate 104 is also fixedly installed overhead through a support side plate frame 103. A control motor 106 is fixedly installed on the top support plate 104. A lead screw 108 is fixedly installed on the output shaft of the control motor 106. A nut plate 107 is threadedly sleeved on the lead screw 108. Four stamping slide rods 105 are fixedly installed on the nut plate 107. The four stamping slide rods 105 are slidably inserted into the top support plate 104 along the direction of gravity. The bottom ends of the four stamping slide rods 105 are fixedly cooperated with a driving lifting plate 133. Among them, a blanking C-shaped frame 115 is slidably installed on the outer surface of the lower die 117. Among them, the driving lifting plate 133 is in contact and cooperation with the top of the blanking C-shaped frame 115. A through hole through which a top blanking ejector reset spring 131 can pass is provided at the top of the blanking C-shaped frame 115. A blanking lifting plate 116 is fixedly installed at the bottom end of the blanking C-shaped frame 115. A bottom ejector rod 120 is fixedly installed on the blanking lifting plate 116. The bottom ejector rod 120 is fixedly cooperated with a bottom blanking convex shaft 118. A cylindrical recessed space is provided at the axial center position of the lower surface of the bottom blanking convex shaft 118. A spring support 122 is arranged in the cylindrical recessed space. The spring support 122 surrounds the bottom ejector rod 120. A spring 121 is fixedly installed at the bottom end of the spring support 122. The spring 121 is fixed on the lower surface of the lower die 117. The top end of the spring support 122 is fixed to the bottom blanking convex shaft 118. And a limiting skirt 114 is further provided at the bottom edge of the bottom blanking convex shaft 118. The limiting skirt 114 is in contact and cooperation with the lower surface of the lower die 117.

[0020] A first force-sensitive resistor is arranged at the edge position of one side of the lower die 117 facing the upper die 124. The first force-sensitive resistor is in contact and cooperation with the edge of the lower surface of the upper die 124. A second force-sensitive resistor is arranged on the upper surface of the blanking C-shaped frame 115. The second force-sensitive resistor is in contact and cooperation with the lower surface of the top support plate 104. And a gap is arranged between the blanking C-shaped frame 115 and the top support plate 104. The first force-sensitive resistor, the second force-sensitive resistor and the fixed-value resistor R1 are connected in series to a 3V DC power supply. Among them, the parameters of the first force-sensitive resistor and the second force-sensitive resistor are the same. The potential between the first force-sensitive resistor and the fixed-value resistor R1 is 1V. When no pressure is applied to the first force-sensitive resistor and the second force-sensitive resistor, the potential difference across both the first force-sensitive resistor and the second force-sensitive resistor is 0.5V. Control parts are connected in parallel at both ends of the first force-sensitive resistor and both ends of the second force-sensitive resistor. The control part includes an NPN triode. The base of the NPN triode is electrically connected to the high-potential point of the corresponding force-sensitive resistor. The emitter of the NPN triode is electrically connected to the low-potential point of the corresponding force-sensitive resistor. And the emitter, collector of the NPN triode and the corresponding relay coil are connected in series to a 12V DC power supply; the relays in the control parts corresponding to the first force-sensitive resistor and the second force-sensitive resistor are KM1 and KM2 respectively; KM1 and KM2 are used to control the forward and reverse rotation of the output shaft of the control motor 106. Use a PLC control circuit to control the forward and reverse rotation of the output shaft of the control motor 106; that is, replace the normally open contacts and normally closed contacts of KM1 and KM2 with buttons with self-locking functions and set them in the control circuit.

[0021] The working principle of a stamping device for processing an automobile heat shield mold disclosed by the present invention is as follows: In the initial state, the upper mold 124 is located at the highest point. At this time, the feeding motor 113 is started, and the output shaft of the feeding motor 113 drives the magnetic active feeding roller 111 to rotate. The magnetic active feeding roller 111 drives the plate-shaped material to be stamped to move (the magnetic suction force between the magnetic passive feeding roller 110 and the magnetic active feeding roller 111 causes the magnetic passive feeding roller 110 to press the plate tightly on the magnetic active feeding roller 111 to provide friction). When the plate moves above the lower mold 117 (completely covering the groove), the control motor 106 is started, and the feeding motor 113 is stopped. The output shaft of the control motor 106 drives the lead screw 108 to rotate, and the output shaft of the lead screw 108 drives the nut plate 107 to move along the axis direction of the lead screw 108. The nut plate 107 drives the four stamping slide rods 105 to move synchronously, and the stamping slide rods 105 drive the driving lifting plate 133 to move synchronously. Under the action of gravity, the upper mold pressing spring 134 and the guiding slide rod 129 drive the upper mold support plate 123 and the upper mold 124 to move downward. As the upper mold 124 descends, the upper mold 124 will contact the lower mold 117, and the protrusions on the upper mold 124 and the grooves on the lower mold 117 will form the plate into the required shape (automobile heat shield). At this time, the first force-sensitive resistor will be squeezed (after the upper mold 124 contacts the lower mold 117, the driving lifting plate 133 continues to move downward. The driving lifting plate 133 squeezes the upper mold support plate 123 and the upper mold 124 through the upper mold pressing spring 134. After squeezing for a certain distance, the driving lifting plate 133 contacts the cross-shaped lower pressing plate 128, and then squeezes the cross-shaped lower pressing plate 128. The cross-shaped lower pressing plate 128 transmits the force to the cutting edge 126 through the cutting edge support slide rod 127, causing the cutting edge 126 to insert into the cutting groove 119 to cut out the outline of the plate. At this time, the pressure between the lower mold 117 and the upper mold 124 will cause the resistance value of the first force-sensitive resistor to drop below the threshold), resulting in a decrease in the potential difference at both ends. At this time, the potential difference at both ends of the second force-sensitive resistor will increase, making it greater than 0.7V, resulting in a triggering forward bias voltage between the emitter and the base of the NPN transistor corresponding to the second force-sensitive resistor. At this time, the collector and the emitter are turned on, and the corresponding relay KM2 coil is energized, and then the output shaft of the control motor 106 is controlled to reverse.This will cause the upper die support plate 123 to move upward. The upward movement of the upper die support plate 123 drives the corresponding driving lifting plate 133 to move upward. (During this process, under the action of the cross-shaped lower pressing plate return spring 132, the cross-shaped lower pressing plate 128 drives the cutting edge support slide bar 127 through the cutting edge to drive the cutting edge 126 to reset, and the upper die downward pressing spring 134 drives the driving lifting plate 133 to reset); when the driving lifting plate 133 moves to contact the blanking C-shaped frame 115, it will drive the blanking C-shaped frame 115 to continue moving upward for a certain distance. At the same time, the bottom end of the top blanking ejector rod 125 contacts the top support plate 104. The upward movement of the blanking C-shaped frame 115 drives the blanking lifting plate 116 to move upward, the upward movement of the blanking lifting plate 116 drives the bottom ejector rod 120 to move upward, and the bottom ejector rod 120 drives the bottom blanking convex shaft 118 to move upward to eject the automotive heat shield stuck in the groove of the lower die 117. (During reset, the bottom blanking convex shaft 118 is pulled downward through the tension spring support 122). At the same time, when the top blanking ejector rod 125 contacts the stamping slide bar 105, the bottom end of the top blanking ejector rod 125 will protrude from the lower surface of the upper die 124 because when the top blanking ejector rod 125 contacts the top support plate 104, it stops moving, while the upper die 124 continues to move upward. If the automotive heat shield is stuck on the upper die 124, the heat shield on the upper die 124 can be ejected. When the blanking C-shaped frame 115 moves to contact the top support plate 104, it squeezes the second force-sensitive resistor, which causes the control motor 106 to rotate forward and continue to drive the upper die 124 to move downward. At the same time, the feeding motor 113 is started. The feeding motor 113 drives the sheet material to move through the magnetic active feeding roller 111, and at the same time drags away the already formed automotive heat shield on the lower die 117 up and down. When the sheet material completely covers the groove on the lower die 117, the feeding motor 113 stops again. Then repeat the above steps to continuously stamp the sheet material to form the automotive heat shield.

Claims

1. A stamping device for processing an automobile heat insulation cover mold, characterized in that: It includes a lower die (117) and an upper die (124). A groove for forming is provided on the lower die (117), and a protrusion adapted to the groove on the lower die (117) is provided on the upper die (124). The groove on the lower die (117) and the protrusion on the upper die (124) are used for forming an automotive heat shield. The upper die (124) is fixedly installed on the upper die support plate (123). Four cutting edge support slide rods (127) are slidably installed on the upper die support plate (123) along the direction of gravity. A cutting edge (126) is fixedly installed at the bottom ends of the four cutting edge support slide rods (127). The cutting edge (126) is slidably embedded in the upper die (124). A cutting groove (119) in contact and cooperation with the cutting edge (126) is provided on the upper surface of the lower die (117). The cutting edge (126) and the cutting groove (119) form a shearing part, and the shearing part is used for separating the formed automotive heat shield from the sheet. A top feeding ejector rod (125) is slidably inserted and matched along the direction of gravity at the central positions of the upper die support plate (123) and the upper die (124). The bottom end of the top feeding ejector rod (125) is flush with the lower surface of the protrusion of the upper die (124). A bottom feeding convex shaft (118) is slidably inserted along the direction of gravity at the central position of the lower die (117). The top feeding ejector rod (125) or the bottom feeding convex shaft (118) is used for separating the formed automotive heat shield from the upper die (124) or the lower die (117).

2. The stamping device for processing an automobile heat insulation cover mold according to claim 1, characterized in that: The lower die (117) is fixedly installed above the bottom plate (101). A feeding seat (102) is also fixedly installed on the bottom plate (101). Two symmetrically arranged feeding roller brackets (109) are fixedly installed on the feeding seat (102). A magnetic active feeding roller (111) is rotatably installed between the two feeding roller brackets (109). The circumference of the magnetic active feeding roller (111) is tangent to the side plane where the upper surface of the lower die (117) is located. Passive feeding roller chutes (112) are provided on both of the two feeding roller brackets (109). A magnetic passive feeding roller (110) is magnetically coupled above the magnetic active feeding roller (111). The two ends of the magnetic passive feeding roller (110) are slidably and rotatably installed in the passive feeding roller chutes (112). A feeding motor (113) is fixedly installed on one of the feeding roller brackets (109). The output shaft of the feeding motor (113) is fixedly coupled with the magnetic active feeding roller (111).

3. The stamping device for processing an automobile heat insulation cover mold according to claim 2, characterized in that: Four guiding slide bars (129) are fixedly installed on the upper die support plate (123). Limiting rings (130) are fixedly installed at the tops of the four guiding slide bars (129). The tops of the four cutting edge support slide bars (127) extend above the upper die support plate (123), and the tops of the four cutting edge support slide bars (127) are fixedly fitted with the cross-shaped lower pressure plate (128). The cross-shaped lower pressure plate (128) is slidably fitted with the guiding slide bars (129). A cross-shaped lower pressure plate return spring (132) is elastically arranged at the central position between the opposite surfaces of the cross-shaped lower pressure plate (128) and the upper die support plate (123). The two ends of the cross-shaped lower pressure plate return spring (132) are fixed to the cross-shaped lower pressure plate (128) and the upper die support plate (123).

4. The stamping device for processing an automobile heat insulation cover mold according to claim 3, characterized in that: The four guiding slide bars (129) are all slidably installed on the driving lifting plate (133). The four guiding slide bars (129) are slidably fitted with the driving lifting plate (133) along the direction of gravity. Among them, the top blanking ejector rod (125) passes through the cross-shaped lower pressure plate (128) and the driving lifting plate (133), and the top blanking ejector rod (125) is slidably fitted with both the cross-shaped lower pressure plate (128) and the driving lifting plate (133). Among them, the cross-shaped lower pressure plate return spring (132) is arranged around the top blanking ejector rod (125). A top blanking ejector rod return spring (131) is sleeved around the top of the top blanking ejector rod (125). The two ends of the top blanking ejector rod return spring (131) are fixed to the top of the top blanking ejector rod (125) and the driving lifting plate (133). Four upper die downward pressure springs (134) are elastically installed between the driving lifting plate (133) and the upper die support plate (123). Exhaust holes (135) are arranged at the positions of the cutting edges (126) on the upper die support plate (123).

5. The stamping device for processing an automobile heat insulation cover mold according to claim 4, characterized in that: Above the bottom plate (101), a top support plate (104) is also fixedly installed overhead through a support side plate frame (103). A control motor (106) is fixedly installed on the top support plate (104). A lead screw (108) is fixedly installed on the output shaft of the control motor (106). A nut plate (107) is threadedly sleeved on the lead screw (108). Four stamping slide bars (105) are fixedly installed on the nut plate (107). The four stamping slide bars (105) are slidably inserted into the top support plate (104) along the direction of gravity.

6. The stamping device for processing an automobile heat insulation cover mold according to claim 5, characterized in that: The bottoms of the four stamping slide bars (105) are fixedly fitted with the driving lifting plate (133). Among them, a blanking C-shaped frame (115) is slidably installed on the outer surface of the lower die (117). Among them, the driving lifting plate (133) is in contact and fit with the top of the blanking C-shaped frame (115). A through hole through which the top blanking ejector rod return spring (131) can pass is arranged at the top of the blanking C-shaped frame (115). The bottom end of the blanking C-shaped frame (115) is fixedly installed with a blanking lifting plate (116). A bottom ejector rod (120) is fixedly installed on the blanking lifting plate (116). The bottom ejector rod (120) is fixedly fitted with the bottom blanking convex shaft (118). A cylindrical concave space is arranged at the axial center position of the lower surface of the bottom blanking convex shaft (118). A spring support (122) is arranged in the cylindrical concave space. The spring support (122) surrounds the bottom ejector rod (120). The bottom end of the spring support (122) is fixedly installed with a spring (121). The spring (121) is fixed on the lower surface of the lower die (117). The top end of the spring support (122) is fixed to the bottom blanking convex shaft (118). And a limiting skirt (114) is also arranged at the bottom edge of the bottom blanking convex shaft (118). The limiting skirt (114) is in contact and fit with the lower surface of the lower die (117).

7. The stamping device for processing an automobile heat insulation cover mold according to claim 6, characterized in that: A first force-sensitive resistor is arranged at the edge position of one side of the lower die (117) facing the upper die (124). The first force-sensitive resistor is in contact and fit with the lower surface edge of the upper die (124). A second force-sensitive resistor is arranged on the upper surface of the blanking C-shaped frame (115). The second force-sensitive resistor is in contact and fit with the lower surface of the top support plate (104). And a gap is arranged between the blanking C-shaped frame (115) and the top support plate (104).

8. The stamping device for processing an automobile heat insulation cover mold according to claim 7, characterized in that: The first force-sensitive resistor, the second force-sensitive resistor and the fixed-value resistor R1 are connected in series to a 3V DC power supply. The parameters of the first force-sensitive resistor and the second force-sensitive resistor are the same. The potential between the first force-sensitive resistor and the fixed-value resistor R1 is 1V. When no pressure is applied to the first force-sensitive resistor and the second force-sensitive resistor, the potential difference across both the first force-sensitive resistor and the second force-sensitive resistor is 0.5V.

9. The stamping device for processing an automobile heat insulation cover mold according to claim 8, characterized in that: Control parts are connected in parallel at both ends of the first force-sensitive resistor and both ends of the second force-sensitive resistor. The control part includes an NPN triode. The base of the NPN triode is electrically connected to the high-potential point of the corresponding force-sensitive resistor. The emitter of the NPN triode is electrically connected to the low-potential point of the corresponding force-sensitive resistor. And the emitter, collector of the NPN triode and the corresponding relay coil are connected in series to a 12V DC power supply; The relays in the control parts corresponding to the first force-sensitive resistor and the second force-sensitive resistor are KM1 and KM2 respectively; KM1 and KM2 are used to control the forward and reverse rotation of the output shaft of the control motor (106).

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