A stamping device for processing automobile heat shield mold

Abstract

The present invention discloses a stamping device for processing automotive heat shield molds, relating to the field of stamping and forming technology. The present invention includes a lower mold, an upper mold, and mechanisms such as magnetic feeding, closed-loop stamping, synchronous shearing, and bidirectional ejection. Magnetic active and passive rollers enable high-precision feeding; first and second force-sensitive resistors and a PLC control circuit monitor the stamping pressure in real time and automatically switch between forward and reverse directions; the cutting blade, driven by a cross-shaped lower pressure plate, cooperates with the cutting groove to achieve simultaneous stamping and shearing; the top ejector rod and the bottom ejector cam cooperate to eject the workpiece completely.

Description

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

[0002] On existing automotive heat shield stamping lines, sheet metal is typically formed and trimmed before undergoing a secondary blanking process using a separate punching die, or relying on manual trimming to remove excess material. While this process can achieve part shape separation, it suffers from significant issues: redundant process steps and limited cycle time. Secondary punching or manual trimming requires additional workstations and fixtures, limiting the entire line cycle time to the slowest process and resulting in low overall efficiency. Burrs and material pullout are difficult to control: During secondary shearing, large burrs can easily form due to blanking gaps, edge wear, or manual positioning errors. These can even cause metal fibers to be stretched and entangled, requiring subsequent grinding and deburring, further increasing time and cost. Dimensional consistency is poor: Manual trimming relies on operator experience, making repeatability difficult to guarantee. Even with secondary punching, sheet repositioning errors and springback can lead to significant dimensional dispersion in part outlines. Safety hazards and labor intensity: Manual trimming involves contact with sharp edges, posing a risk of cuts. Furthermore, the high intensity of manual work can lead to fatigue, making it difficult to meet modern safety production requirements. Summary of the Invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a stamping device for processing an automobile heat shield mold, comprising a lower mold and an upper mold, the lower mold is provided with a groove for molding, the upper mold is provided with a protrusion adapted to the groove on the lower mold, the groove on the lower mold and the protrusion on the upper mold are used to mold the automobile heat shield; the upper mold is fixedly mounted on an upper mold support plate, four cutting blade support slide bars are slidably mounted on the upper mold support plate along the direction of gravity, the bottom ends of the four cutting blade support slide bars are fixedly mounted with cutting blades, and the cutting blades are slidably embedded in the upper mold The upper surface of the lower mold is provided with a cutting groove that contacts and cooperates with the cutting blade, and the cutting blade and the cutting groove form a shearing portion, which is used to separate the formed automobile heat insulation cover from the plate; the upper mold support plate and the center position of the upper mold are slidably inserted along the direction of gravity and are equipped with a top blanking ejector rod, the bottom end of the top blanking ejector rod is flush with the lower surface of the upper mold protrusion, and the center position of the lower mold is slidably inserted along the direction of gravity and is provided with a bottom blanking cam shaft. The top blanking ejector rod or the bottom blanking cam shaft is used to separate the formed automobile heat insulation cover from the upper mold or the lower mold.

[0004] Preferably, the lower mold is fixedly mounted on the base plate in an overhead manner, and a feed seat is also fixedly mounted on the base plate, and two symmetrically arranged feed roller brackets are fixedly mounted on the feed seat, and a magnetic active feed roller is rotatably mounted between the two feed roller brackets, and the circumference of the magnetic active feed roller is tangent to the side plane where the upper surface of the lower mold is located, and passive feed roller chutes are provided on the two feed roller brackets, and a magnetic passive feed roller is magnetically engaged above the magnetic active feed roller, and both ends of the magnetic passive feed roller are slidably and rotatably mounted in the passive feed roller chute, and a feed motor is fixedly mounted on one of the feed roller brackets, and the output shaft of the feed motor is fixedly engaged with the magnetic active feed roller.

[0005] Preferably, four guide slides are fixedly installed on the upper mold support plate, and the top ends of the four guide slides are fixedly installed with limit rings. The top ends of the four cutting blade support slides extend above the upper mold support plate, and the top ends of the four cutting blade support slides are fixedly matched with the cross lower pressure plate, and the cross lower pressure plate slides with the guide slides. A cross lower pressure plate return spring is elastically provided at the center position between the opposite surfaces of the cross lower pressure plate and the upper mold support plate, and both ends of the cross lower pressure plate return spring are fixed to the cross lower pressure plate and the upper mold support plate.

[0006] Preferably, the four guide slides are all slidably mounted on the driving lifting plate, and the four guide slides are slidably matched with the driving lifting plate along the direction of gravity, wherein the top unloading ejector rod passes through the cross lower pressure plate and the driving lifting plate, and the top unloading ejector rod is slidably matched with the cross lower pressure plate and the driving lifting plate, wherein the cross lower pressure plate return spring is surrounded by the top unloading ejector rod, and the top of the top unloading ejector rod is surrounded by a top unloading ejector rod return spring, and the two ends of the top unloading ejector rod return spring are fixed to the top end of the top unloading ejector rod and the driving lifting plate; four upper mold lower pressure springs are elastically installed between the driving lifting plate and the upper mold support plate, and an exhaust hole is provided on the upper mold support plate at the position of the cutting blade.

[0007] Preferably, a top support plate is fixedly installed above the bottom plate through a supporting side plate frame, a control motor is fixedly installed on the top support plate, a screw rod is fixedly installed on the output shaft of the control motor, a threaded transmission sleeve on the screw rod is provided with a nut plate, four stamped slide rods are fixedly installed on the nut plate, and the four stamped 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 matched with the driving lifting plate; the outer surface of the lower mold is slidably installed with a blanking C-shaped frame, wherein the driving lifting plate is in contact with the top of the blanking C-shaped frame, and the top of the blanking C-shaped frame is provided with a through hole that allows the top blanking ejector rod reset spring to pass through; the bottom end of the blanking C-shaped frame is fixedly installed with a blanking lifting plate, and the blanking lifting plate is fixedly installed with a bottom ejector rod, and the bottom ejector rod is fixedly matched with the bottom blanking cam, and a cylindrical recessed space is provided at the axial position of the lower surface of the bottom blanking cam, and a tension spring is provided in the cylindrical recessed space, and the tension spring is wrapped around the bottom ejector rod, and the bottom end of the tension spring is fixedly installed with a tension spring bracket, and the tension spring bracket is fixed to the lower surface of the lower mold, the top of the tension spring is fixed to the bottom blanking cam, and the bottom end edge of the bottom blanking cam is also provided with a limiting skirt, and the limiting skirt is in contact with the lower surface of the lower mold.

[0009] Preferably, a first force-sensitive resistor is provided at the edge of a side of the lower mold facing the upper mold, and the first force-sensitive resistor is in contact with the edge of the lower surface of the upper mold. A second force-sensitive resistor is provided on the upper surface of the blanking C-shaped frame, and the second force-sensitive resistor is in contact 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 resistor R1 are connected in series to a 3V DC power supply, wherein 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 resistor R1 is 1V, and when the first force-sensitive resistor and the second force-sensitive resistor are not subjected to pressure, the potential difference across the first force-sensitive resistor and the second force-sensitive resistor is 0.5V.

[0011] Preferably, both ends of the first force-sensitive resistor and both ends of the second force-sensitive resistor are connected in parallel with a control unit, the control unit 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 and corresponding relay coil of the NPN transistor are connected in series to a 12V DC power supply; the relays in the control units 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] Compared with the prior art, the present invention has the following advantages: (1) The synchronous shearing mechanism composed of the cutting blade support slide bar, the cross lower pressure plate, the cutting blade and the cutting groove 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 blade is guaranteed to have a translational accuracy by the guide slide bar, and the reset spring rebounds in time, avoiding the conventional blanking blade from repeatedly setting the knife to cause edge burrs or pulling of the material; (2) The present invention uses a dual-channel pressure detection circuit composed of the first and second force-sensitive resistors to communicate with the KM1, KM2 relays and The PLC forms a logical control so that the punching stroke can be automatically reversed after detecting that the molding pressure reaches the standard; at the same time, an upper limit feedback is applied to the unloading stroke to avoid premature failure of the mold due to excessive pressure or poor molding due to insufficient pressure; (3) The present invention adopts a two-way ejection structure with a top ejection rod + a bottom ejection cam + a tension spring, and the upper and lower molds can eject the workpiece independently or synchronously; even if the workpiece is stuck due to local rebound, it can be ejected smoothly, which not only eliminates the risk of scratches caused by manual prying of the mold, but also prevents the thin-walled heat insulation cover from deformation due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0015] Figure 3 This is a structural diagram of the magnetic active feed roller of the present invention;

[0016] Figure 4 This is a schematic diagram of the C-shaped blanking frame structure of the present invention;

[0017] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0018] Figure 6 This is a schematic diagram of the lower mold structure of the present invention;

[0019] Figure 7 This is a schematic diagram of the upper mold structure of the present invention;

[0020] Figure 8 This is a schematic diagram of the upper mold motion limiting principle of the present invention.

[0021] In the figure: 101-bottom plate; 102-feed seat; 103-support side plate frame; 104-top support plate; 105-stamping slide; 106-control motor; 107-nut plate; 108-screw; 109-feed roller bracket; 110-magnetic passive feed roller; 111-magnetic active feed roller; 112-passive feed roller chute; 113-feed motor; 114-limiting skirt; 115-blank C-shaped frame; 116-blank lifting plate; 117-lower mold; 118-bottom lower Material cam; 119-cutting groove; 120-bottom ejector rod; 121-tension spring bracket; 122-tension spring; 123-upper mold support plate; 124-upper mold; 125-top ejector rod; 126-cutting blade; 127-cutting blade support slide; 128-cross lower pressure plate; 129-guide slide; 130-limiting ring; 131-top ejector rod return spring; 132-cross lower pressure plate return spring; 133-drive lifting plate; 134-upper mold lower pressure spring; 135-exhaust hole. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1-8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0023] The present invention provides a stamping device for processing a mold for an automobile heat shield, comprising a lower mold 117 and an upper mold 124. The lower mold 117 is provided with a groove for molding, and the upper mold 124 is provided with a protrusion adapted to the groove on the lower mold 117. The groove on the lower mold 117 and the protrusion on the upper mold 124 are used to mold the automobile heat shield; the upper mold 124 is fixedly mounted on an upper mold support plate 123, and four cutting blade support slide bars 127 are slidably mounted on the upper mold support plate 123 along the direction of gravity. The bottom ends of the four cutting blade support slide bars 127 are fixedly mounted with cutting blades 126, and the cutting blades 126 are slidably embedded in the upper mold 124, wherein the upper surface of the lower mold 117 is fixedly mounted on the upper mold support plate 123. The surface is provided with a cutting groove 119 which contacts and cooperates with the cutting blade 126. The cutting blade 126 and the cutting groove 119 form a shearing portion, which is used to separate the formed automobile heat insulation cover from the plate; the center position of the upper mold support plate 123 and the upper mold 124 is slidably inserted along the direction of gravity and is equipped with a top unloading ejector rod 125, and the bottom end of the top unloading ejector rod 125 is flush with the raised lower surface of the upper mold 124, and the center position of the lower mold 117 is slidably inserted along the direction of gravity and is provided with a bottom unloading cam 118. The top unloading ejector rod 125 or the bottom unloading cam 118 is used to separate the formed automobile heat insulation cover from the upper mold 124 or the lower mold 117.

[0024] The lower mold 117 is fixedly mounted overhead on the base plate 101, and a feed seat 102 is also fixedly mounted on the base plate 101. Two symmetrically arranged feed roller brackets 109 are fixedly mounted on the feed seat 102. A magnetic active feed roller 111 is rotatably mounted 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 mold 117 is located. A passive feed roller chute 112 is provided on the two feed roller brackets 109. A magnetic passive feed roller 110 is magnetically attracted above the magnetic active feed roller 111. Both ends of the magnetic passive feed roller 110 are slidably and rotatably mounted in the passive feed roller chute 112. A feed motor 113 is fixedly mounted on one of the feed roller brackets 109, and the output shaft of the feed motor 113 is fixedly matched with the magnetic active feed roller 111.

[0025] Four guide slides 129 are fixedly installed on the upper mold support plate 123, and the top ends of the four guide slides 129 are fixedly installed with limit rings 130. The top ends of the four cutting blade support slides 127 extend above the upper mold support plate 123, and the top ends of the four cutting blade support slides 127 are fixedly matched with the cross lower pressure plate 128. The cross lower pressure plate 128 slides with the guide slides 129. A cross lower pressure plate return spring 132 is elastically provided at the center position between the opposite surfaces of the cross lower pressure plate 128 and the upper mold support plate 123. The two ends of the cross lower pressure plate return spring 132 are fixed to the cross lower pressure plate 128 and the upper mold support plate 123. The four guide slides 129 are all slidably mounted on the driving lifting plate 133, and the four guide slides 129 slide in cooperation with the driving lifting plate 133 along the direction of gravity, wherein the top unloading ejector rod 125 passes through the cross lower pressure plate 128 and the driving lifting plate 133, and the top unloading ejector rod 125 slides in cooperation with the cross lower pressure plate 128 and the driving lifting plate 133, wherein the cross lower pressure plate return spring 132 is surrounded by the top unloading ejector rod 125, and the top of the top unloading ejector rod 125 is surrounded by a top unloading ejector rod return spring 131, and the two ends of the top unloading ejector rod return spring 131 are fixed to the top end of the top unloading ejector rod 125 and the driving lifting plate 133; four upper mold lower pressure springs 134 are elastically installed between the driving lifting plate 133 and the upper mold support plate 123, and an exhaust hole 135 is provided on the upper mold support plate 123 at the position of the cutting blade 126.

[0026] A top support plate 104 is fixedly installed above the bottom plate 101 through the supporting side plate frame 103. A control motor 106 is fixedly installed on the top support plate 104. A screw rod 108 is fixedly installed on the output shaft of the control motor 106. A nut plate 107 is provided on the threaded transmission sleeve of the screw rod 108. Four stamped slide rods 105 are fixedly installed on the nut plate 107. The four stamped slide rods 105 are slidably inserted into the top support plate 104 along the direction of gravity. The bottom ends of the four stamping slides 105 are fixedly matched with the driving lifting plate 133; the outer surface of the lower mold 117 is slidably mounted with a blanking C-shaped frame 115, wherein the driving lifting plate 133 is in contact with the top of the blanking C-shaped frame 115, and the top of the blanking C-shaped frame 115 is provided with a through hole that allows the top blanking ejector rod return spring 131 to pass through; the bottom end of the blanking C-shaped frame 115 is fixedly mounted with a blanking lifting plate 116, and the blanking lifting plate 116 is fixedly mounted with a bottom ejector rod 120, and the bottom ejector rod 120 is fixed to the bottom blanking cam 118 In coordination, a cylindrical recessed space is provided at the axial position of the lower surface of the bottom blanking cam 118, and a tension spring 122 is provided in the cylindrical recessed space. The tension spring 122 is wrapped around the bottom push rod 120, and a tension spring bracket 121 is fixedly installed at the bottom end of the tension spring 122. The tension spring bracket 121 is fixed to the lower surface of the lower mold 117. The top end of the tension spring 122 is fixed to the bottom blanking cam 118, and a limiting skirt 114 is also provided at the bottom edge of the bottom blanking cam 118. The limiting skirt 114 is in contact with the lower surface of the lower mold 117.

[0027] A first force-sensitive resistor is provided on the edge of a side of the lower mold 117 facing the upper mold 124. The first force-sensitive resistor contacts and cooperates with the edge of the lower surface of the upper mold 124. A second force-sensitive resistor is provided on the upper surface of the blanking C-shaped frame 115. The second force-sensitive resistor contacts and cooperates with the lower surface of the top support plate 104, and a gap is provided 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 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 resistor R1 is 1V. When the first force-sensitive resistor and the second force-sensitive resistor are not subjected to pressure, the potential difference across the first force-sensitive resistor and the second force-sensitive resistor is 0.5V. A control unit is connected in parallel to both ends of the first force-sensitive resistor and the second force-sensitive resistor. The control unit includes an NPN transistor, the base of which is electrically connected to the high-potential point of the corresponding force-sensitive resistor, and the emitter of which is electrically connected to the low-potential point of the corresponding force-sensitive resistor. The emitter, collector, and corresponding relay coil of the NPN transistor are connected in series to a 12V DC power supply. The relays in the control unit corresponding to the first and second force-sensitive resistors 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. A PLC control circuit is used to control the forward and reverse rotation of the output shaft of the control motor 106. That is, the normally open and normally closed contacts of KM1 and KM2 are replaced with buttons with a self-locking function, which are then set in the control circuit.

[0028] The working principle of the punching device for processing automobile heat shield mold disclosed in the present invention is as follows: in the initial state, the upper mold 124 is at the highest point, at this time, the feed motor 113 is started, and the output shaft of the feed motor 113 drives the magnetic active feed roller 111 to rotate, and the magnetic active feed roller 111 drives the plate material to be punched to move (the magnetic attraction between the magnetic passive feed roller 110 and the magnetic active feed roller 111 causes the magnetic passive feed roller 110 to press the plate against the magnetic active feed roller 111 to provide friction), when the plate moves to the top of the lower mold 117 (completely covering the groove ), start the control motor 106, stop the feed motor 113, the output shaft of the control motor 106 drives the screw 108 to rotate, the output shaft of the screw 108 drives the nut plate 107 to move along the axial direction of the screw 108, the nut plate 107 drives the four stamping slides 105 to move synchronously, the stamping slide 105 drives the driving lifting plate 133 to move synchronously, and the upper mold support plate 123 and the upper mold 124 are driven downward by the upper mold lower compression spring 134 and the guide slide 129 under the action of gravity. As the upper mold 124 descends, the upper mold 124 will contact the lower mold 117 , and the protrusion on the upper mold 124 and the groove on the lower mold 117 form the plate into the required shape (car heat shield), at this time the first force-sensitive resistor will be squeezed (when the upper mold 124 contacts the lower mold 117, the driving pull plate 133 continues to move downward, and the driving pull plate 133 squeezes the upper mold support plate 123 and the upper mold 124 through the upper mold lower pressure spring 134. After squeezing for a distance, the driving pull plate 133 contacts the cross lower pressure plate 128, and then squeezes the cross lower pressure plate 128. The cross lower pressure plate 128 transmits the force through the cutting blade support slide bar 127 To the cutting blade 126, so that the cutting blade 126 is inserted into the cutting groove 119, and the outline of the plate is cut out. At this time, the pressure between the lower mold 117 and the upper mold 124 will cause the resistance of the first force-sensitive resistor to drop to within 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 triggered positive bias voltage between the emitter and base of the NPN transistor corresponding to the second force-sensitive resistor. At this time, the collector and 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 mold support plate 123 to move upward, and the upper mold support plate 123 moves upward, driving the corresponding driving lifting plate 133 to move upward (in this process, under the action of the cross lower pressure plate reset spring 132, the cross lower pressure plate 128 drives the cutting blade 126 to reset through the cutting blade support slide bar 127, and the upper mold lower pressure 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 to move upward for a distance. At the same time, the bottom end of the top blanking ejector rod 125 contacts the top support plate 104. The blanking C-shaped frame 115 moves upward, driving the blanking lifting plate 116 to move upward, and the blanking lifting plate 116 moves upward, driving the bottom ejector rod 120 to move upward, and the bottom ejector rod 120 drives The bottom blanking cam 118 moves upward to push out the automobile heat shield stuck in the groove of the lower mold 117 (when resetting, the bottom blanking cam 118 is pulled downward by the tension spring 122). At the same time, the top blanking ejector rod 125 contacts the stamping slide bar 105, causing the bottom end of the top blanking ejector rod 125 to protrude from the lower surface of the upper mold 124. This is because when the top blanking ejector rod 125 contacts the top support plate 104, it no longer moves, while the upper mold 124 continues to move upward. If the automobile heat shield is stuck on the upper mold 124, the heat shield on the upper mold 124 can be pushed down. When the blanking C-shaped frame 115 moves to contact the top support plate 104, it squeezes the second force-sensitive resistor, thereby causing the control motor 106 to rotate forward, and continue to drive the upper mold 124 to move downward. At the same time, the feed motor 113 is activated. The feed motor 113 drives the sheet metal via the magnetic active feed roller 111, simultaneously pulling the already formed automotive heat shield off the lower die 117. Once the sheet metal completely covers the grooves on the lower die 117, the feed motor 113 stops. The above steps are then repeated to continuously stamp the sheet metal into an automotive heat shield.

Claims

1. A punching device for processing a mold for an automobile heat shield, characterized in that: The invention comprises a lower mold (117) and an upper mold (124), wherein the lower mold (117) is provided with a groove for molding, and the upper mold (124) is provided with a protrusion adapted to the groove on the lower mold (117), and the groove on the lower mold (117) and the protrusion on the upper mold (124) are used to mold the automobile heat shield; The upper mold (124) is fixedly mounted on the upper mold support plate (123), and four cutting blade support slide bars (127) are slidably mounted on the upper mold support plate (123) along the direction of gravity. The bottom ends of the four cutting blade support slide bars (127) are fixedly mounted with cutting blades (126), and the cutting blades (126) are slidably embedded in the upper mold (124). The upper surface of the lower mold (117) is provided with a cutting groove (119) that contacts and cooperates with the cutting blades (126). The cutting blades (126) and the cutting groove (119) form a shearing portion, and the shearing portion is used to separate the formed automobile heat shield from the plate. The center position of the upper mold support plate (123) and the upper mold (124) is slidably connected along the direction of gravity and is equipped with a top blanking ejector rod (125). The bottom end of the top blanking ejector rod (125) is flush with the raised lower surface of the upper mold (124). The center position of the lower mold (117) is slidably connected along the direction of gravity and is equipped with a bottom blanking convex shaft (118). The top blanking ejector rod (125) or the bottom blanking convex shaft (118) is used to separate the formed automobile heat shield from the upper mold (124) or the lower mold (117). Four guide slide bars (129) are fixedly mounted on the upper mold support plate (123), and the top ends of the four guide slide bars (129) are fixedly mounted with a limit ring (130). The top ends of the four cutting blade support slide bars (127) extend above the upper mold support plate (123), and the top ends of the four cutting blade support slide bars (127) are fixedly matched with the cross lower pressure plate (128). The cross lower pressure plate (128) and the guide slide bars (129) are slidably matched. A cross lower pressure plate return spring (132) is elastically provided at the center position between the opposite surfaces of the cross lower pressure plate (128) and the upper mold support plate (123), and both ends of the cross lower pressure plate return spring (132) are fixed to the cross lower pressure plate (128) and the upper mold support plate (123); The four guide slides (129) are all slidably mounted on the driving lifting plate (133), and the four guide slides (129) are slidably matched with the driving lifting plate (133) along the direction of gravity, wherein the top material removal ejector rod (125) passes through the cross lower pressure plate (128) and the driving lifting plate (133), and the top material removal ejector rod (125) is slidably matched with the cross lower pressure plate (128) and the driving lifting plate (133), wherein the cross lower pressure plate return spring (132) is surrounded and arranged on the top material removal ejector rod (125), and the top of the top material removal ejector rod (125) is surrounded and provided with a top material removal ejector rod return spring (131), and the two ends of the top material removal ejector rod return spring (131) are fixed to the top end of the top material removal ejector rod (125) and the driving lifting plate (133); Four upper mold lower compression springs (134) are elastically installed between the driving lifting plate (133) and the upper mold support plate (123), and an exhaust hole (135) is provided on the upper mold support plate (123) at the position of the cutting blade (126).

2. A stamping device for processing a mold for an automobile heat shield according to claim 1, characterized in that: The lower mold (117) is fixedly mounted on the bottom plate (101) in an overhead manner. The bottom plate (101) is also fixedly mounted with a feed seat (102). Two symmetrically arranged feed roller brackets (109) are fixedly mounted on the feed seat (102). A magnetic active feed roller (111) is rotatably mounted 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 mold (117) is located. A passive feed roller chute (112) is provided on both feed roller brackets (109). A magnetic passive feed roller (110) is magnetically engaged above the magnetic active feed roller (111). Both ends of the magnetic passive feed roller (110) are slidably and rotatably mounted in the passive feed roller chute (112). A feed motor (113) is fixedly mounted on one of the feed roller brackets (109). The output shaft of the feed motor (113) is fixedly engaged with the magnetic active feed roller (111).

3. The punching device for processing a mold for an automobile heat shield according to claim 2, characterized in that: A top support plate (104) is also fixedly installed above the bottom plate (101) by supporting the side plate frame (103), a control motor (106) is fixedly installed on the top support plate (104), a screw rod (108) is fixedly installed on the output shaft of the control motor (106), a threaded transmission sleeve on the screw rod (108) is provided with a nut plate (107), four stamping slide rods (105) are fixedly installed on the nut plate (107), and the four stamping slide rods (105) are slidably inserted into the top support plate (104) along the direction of gravity.

4. The punching device for processing a mold for an automobile heat shield according to claim 3, characterized in that: The bottom ends of the four punching slide bars (105) are fixedly matched with the driving lifting plate (133); wherein a blanking C-shaped frame (115) is slidably mounted on the outer surface of the lower mold (117), wherein the driving lifting plate (133) is in contact with the top of the blanking C-shaped frame (115), and the top of the blanking C-shaped frame (115) is provided with a through hole capable of allowing a top blanking ejector rod return spring (131) to pass through; A blanking lifting plate (116) is fixedly installed at the bottom end of the blanking C-shaped frame (115), and a bottom push rod (120) is fixedly installed on the blanking lifting plate (116). The bottom push rod (120) is fixedly matched with the 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), and a tension spring (122) is provided in the cylindrical recessed space. The tension spring (122) surrounds the bottom push rod (120), and a tension spring bracket (121) is fixedly installed at the bottom end of the tension spring (122). The tension spring bracket (121) is fixed on the lower surface of the lower mold (117). The top end of the tension spring (122) is fixed to the bottom blanking convex shaft (118), and a limiting skirt (114) is also provided at the bottom edge of the bottom blanking convex shaft (118). The limiting skirt (114) contacts and cooperates with the lower surface of the lower mold (117).

5. The punching device for processing a mold for an automobile heat shield according to claim 4, characterized in that: A first force-sensitive resistor is provided at an edge of a side of the lower mold (117) facing the upper mold (124), and the first force-sensitive resistor is in contact with the edge of the lower surface of the upper mold (124). A second force-sensitive resistor is provided on the upper surface of the blanking C-shaped frame (115), and the second force-sensitive resistor is in contact with the lower surface of the top support plate (104), and a gap is provided between the blanking C-shaped frame (115) and the top support plate (104).

6. The punching device for processing a mold for an automobile heat shield according to claim 5, characterized in that: The first force-sensitive resistor, the second force-sensitive resistor and the fixed resistor R1 are connected in series to a 3V DC power supply, wherein 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 resistor R1 is 1V, and when the first force-sensitive resistor and the second force-sensitive resistor are not subjected to pressure, the potential difference across the first force-sensitive resistor and the second force-sensitive resistor is 0.5V.

7. The punching device for processing a mold for an automobile heat shield according to claim 6, characterized in that: A control unit is connected in parallel to both ends of the first force-sensitive resistor and both ends of the second force-sensitive resistor. The control unit includes an NPN transistor. The base of the NPN transistor is electrically connected to the high potential point of the corresponding force-sensitive resistor, and the emitter of the NPN transistor is electrically connected to the low potential point of the corresponding force-sensitive resistor. The emitter, collector and corresponding relay coil of the NPN transistor are connected in series to a 12V DC power supply. The relays in the control unit 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).

Images