Automatic feeding single-point closed press

Abstract

The invention relates to the technical field of press machines, in particular to an automatic feeding single-point closed press machine which comprises a rack, a sliding block, a supporting table, a driving device and an automatic feeding device, the sliding block and the supporting table are arranged on the inner side of the rack in the vertical direction, a machining space is formed between the sliding block and the supporting table, the sliding block can move in the vertical direction, and a first punch is arranged on the sliding block; the first punch is used for punching a punched hole in a plate, and a first material passing hole matched with the first punch is formed in the supporting table. The automatic feeding device is used for feeding plates into the machining space in the transverse direction, the transverse direction is perpendicular to the vertical direction, and the automatic feeding device comprises a conveying frame and a detection structure. Through cooperation of the automatic feeding device and the two punches on the sliding block, automatic, continuous and stable conveying of plates can be achieved, waste can be cut into two parts in the punching process, additional cutting is not needed, and the waste treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of presses, in particular to a single-point closed press with automatic feeding. Background Art

[0002] A closed single-point press is a type of stamping equipment that applies pressure to the workpiece using a crankshaft connecting rod or hydraulic mechanism to drive a slide. It is widely used in blanking, bending, and stretching processes in the automotive, aerospace, and other fields. Its closed frame structure (e.g., a four-column design) offers greater rigidity and precision than open-type presses, effectively reducing deformation and making it suitable for the production of large and medium-sized, high-precision stamping parts.

[0003] In existing technology, the use of closed single-point presses to stamp round parts (such as brake pads) often relies on manual feeding, which makes it difficult to ensure continuous and stable feeding. Furthermore, the resulting waste often requires additional cutting, resulting in inefficient waste disposal. To address these issues, the present invention proposes a single-point closed press with automatic feeding. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a single-point closed press with automatic feeding, which can improve the continuity and stability of feeding and the efficiency of waste processing.

[0005] The present invention is realized through the following technical solutions: a single-point closed press with automatic feeding, comprising a frame, a slider, a support platform, a driving device and an automatic feeding device, wherein the slider and the support platform are arranged vertically on the inner side of the frame, a processing space is formed between the slider and the support platform, the slider is movable vertically, a first punch is provided on the slider, the first punch is used to punch holes in the sheet material, and a first feeding hole is provided on the support platform to cooperate with the first punch; the automatic feeding device is used to feed the sheet material into the processing space in a horizontal direction, the horizontal direction is perpendicular to the vertical direction, the automatic feeding device comprises a conveying frame and a detection structure, wherein the conveying frame comprises a conveying roller and a conveying motor for driving the conveying roller to rotate; the detection structure comprises a fixed seat, A detection rod and a switch assembly, the fixed seat is fixed on the frame, the detection rod and the first punch are arranged in sequence along the conveying direction of the sheet material, the detection rod is elastically connected to the fixed seat in the transverse direction, the first punch is protruded on the side facing the detection rod to form a second punch, the support platform has a second feed hole that cooperates with the second punch, the second punch is used to punch out a connecting hole on the sheet material that connects two adjacent punches, the connecting hole and the punching hole together form a detection channel on the sheet material, the detection rod has a detection end that is inserted into the detection channel and moves along the detection channel, the switch assembly is used to detect the relative position of the detection rod and the fixed seat, and output a switch signal for controlling the start or shut down of the conveying motor according to the relative position.

[0006] Optionally, the first side of the first punch facing the support platform is a first stamping surface, the side of the second punch facing the support platform is a second stamping surface, and the vertical distance between the first stamping surface and the second stamping surface is not less than the thickness of the sheet material.

[0007] Optionally, the switch assembly includes two conductive contacts and a conductive plate, the two conductive contacts are fixed on the fixing seat, the two conductive contacts and the conveying motor are arranged in series in a circuit, the conductive plate is fixed on the detection rod, and the two conductive contacts and the conductive plate are arranged opposite to each other in the transverse direction.

[0008] Optionally, the detection rod and the second punch have an overlapping portion in the vertical direction, and the detection rod has an extrusion inclined surface that contacts and cooperates with the second punch.

[0009] Optionally, a roller is mounted on the second punch, and the second punch is in rolling contact with the extrusion inclined surface through the roller.

[0010] Optionally, the second punch is a columnar body with a trapezoidal cross section, and the top surface of the columnar body is connected to the first punch.

[0011] Optionally, the detection rod is slidably connected to the fixing seat via a slide rail, and the detection rod and the fixing seat are elastically connected via a return spring.

[0012] Optionally, the support platform includes an upper platform, a lower platform and connecting columns, the first feeding hole and the second feeding hole are both provided on the upper platform, and the upper platform and the lower platform are fixedly connected by a plurality of connecting columns.

[0013] Optionally, the automatic feeding single-point closed press also includes a pneumatic component, which includes a first cylinder and a second cylinder, the cylinder body of the first cylinder and the cylinder body of the second cylinder are connected by a connecting pipe, the piston rod of the first cylinder is fixed to the slider, and the piston rod of the second cylinder is fixed to the support platform.

[0014] Optionally, there are two conveying racks, namely an upper conveying rack and a lower conveying rack, and the conveying rollers are provided on both the upper conveying rack and the lower conveying rack, and the upper conveying rack and the lower conveying rack are elastically connected by a spring device.

[0015] Compared with the existing technology, the present invention provides a single-point closed press with automatic feeding, which has the following beneficial effects: 1. The present invention can not only realize the automatic, continuous and stable transportation of sheet materials through the coordinated cooperation of the automatic feeding device and the two punches on the slider, but also cut the waste into two parts during the stamping process, without the need for additional cutting, thereby improving the waste processing efficiency.

[0016] 2. The present invention ensures that the vertical distance between the first punching surface and the second punching surface is not less than the thickness of the sheet material, so that the forming of the connecting hole can be carried out after the punching forming. The two hole forming processes are carried out in chronological order, thereby smoothly separating the finished product (corresponding to the first punching surface) and the waste material (corresponding to the second punching surface), reducing the trouble of subsequent cutting.

[0017] 3. The present invention makes the detection rod and the second punch overlap in the vertical direction. This makes the punching position of the second punch on the sheet material in the subsequent punching process overlap with the punching position of the first punch on the sheet material in the previous punching process. This ensures that the second punch can completely punch out the connecting portion between the front and rear punching holes in the subsequent punching process, forming a connecting hole that penetrates the two punching holes, thereby avoiding the phenomenon that the front and rear punching holes are not connected or are not completely connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the one-axis side of the overall structure of the single-point closed press.

[0019] Figure 2This is another axial schematic diagram of the overall structure of the single-point closed press.

[0020] Figure 3 This is a schematic diagram of the main structure of a single-point closed press.

[0021] Figure 4 for Figure 3 A is an enlarged structural diagram of FIG.

[0022] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at point B.

[0023] Figure 6 Schematic diagram of the detection structure.

[0024] Figure 7 Schematic diagram of the slider structure.

[0025] Figure 8 Schematic diagram of the connection structure of the slider, support platform and pneumatic components.

[0026] Figure 9 Schematic diagram of the connection structure between the slider and the driving device.

[0027] Figure 10 Schematic diagram of the sheet material structure.

[0028] In the figure: 100, frame; 110, slider; 111, first punch; 1110, first punching surface; 112, second punch; 1120, second punching surface; 113, vertical perforation; 114, roller; 120, support platform; 121, upper platform; 1210, first feed hole; 1211, second feed hole; 122, lower platform; 123, connecting column; 130, driving device; 131, driving motor; 132, driving disk; 133, connecting rod; 134, first rotating shaft; 135, second rotating shaft; 140, guide rail; 150, pneumatic assembly; 151, first cylinder; 1510, cylinder body of first cylinder; 1511, piston rod of first cylinder; 152, second cylinder; 1520, second Cylinder body; 1521, piston rod of the second cylinder; 153, connecting pipe; 200, upper conveying frame; 201, lower conveying frame; 202, conveying roller; 203, conveying motor; 204, spring device; 2040, first connecting plate; 2041, second connecting plate; 2042, screw; 2043, nut; 2044, compression spring; 210, detection structure; 211, fixing seat; 212, detection rod; 2120, detection end; 2121, extrusion slope; 213, switch assembly; 2130, conductive contact; 2131, conductive plate; 214, slide rail; 215, reset spring; 216, connecting shaft; 300, sheet material; 310, detection channel; 311, punching hole; 312, connecting hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] As described in the background art, in the prior art, the use of closed single-point presses to stamp round parts (such as brake pads) mostly relies on manual feeding, which makes it difficult to ensure the continuity and stability of feeding; at the same time, the waste generated usually requires additional cutting processing, resulting in low waste processing efficiency.

[0031] To solve the above problems, see Figures 1 to 7 According to an embodiment of the present invention, a single-point closed press with automatic feeding is provided, which mainly includes a frame 100, a slider 110, a support platform 120 and an automatic feeding device, wherein the frame 100 adopts a closed frame structure, the slider 110 and the support platform 120 are arranged vertically inside the frame 100, and a processing space is provided between the slider 110 and the support platform 120. The slider 110 is movable vertically. Figure 1 In the vertical direction, that is, the height direction of the frame 100, the slider 110 is provided with a first punch 111, which is used to punch a hole 311 in the sheet material 300 (i.e., the blank), and the support platform 120 is provided with a first feed hole 1210 that cooperates with the first punch 111. Taking the production of automobile brake discs as an example, the first punch 111 can adopt a columnar structure, and the first feed hole 1210 is a circular hole with a circular cross-section slightly smaller than that of the first punch 111; the automatic feeding device is used to feed the sheet material 300 into the processing space in a horizontal direction, which is perpendicular to the vertical direction. Figure 1 In the figure, the horizontal direction is the left and right direction of the frame 100. The automatic feeding device includes a conveying frame and a detection structure 210, wherein the conveying frame includes a conveying roller 202 and a conveying motor 203 for driving the conveying roller 202 to rotate; the detection structure 210 includes a fixed seat 211, a detection rod 212 and a switch assembly 213, the fixed seat 211 is fixed on the frame 100, and in order to enable the fixed seat 211 to be smoothly fixedly connected to the frame 100, a vertical through hole 113 can be provided on the slider 110, and the fixed seat 211 is fixed to the top of the inner side of the frame 100 by a connecting shaft 216 that moves through the vertical through hole 113. The detection rod 212 and the first punch 111 are arranged in sequence along the conveying direction of the sheet material 300. Figure 1In the embodiment, the conveying direction of the sheet 300 is from the left side of the frame 100 to the right side of the frame 100, the detection rod 212 is elastically connected to the fixed seat 211 in the horizontal direction, and the first punch 111 is protruded to form a second punch 112 on the side facing the detection rod 212, and the support platform 120 has a second feed hole 1211 that cooperates with the second punch 112, and the second punch 112 is used to punch out a connecting hole 312 connecting two adjacent punching holes 311 on the sheet 300, and the connecting hole 312 and the punching hole 311 together form a detection channel 310 on the sheet 300, and the detection rod 212 has a detection end 2120 that is inserted into the detection channel 310 and moves along the detection channel 310, and the switch assembly 213 is used to detect the relative position of the detection rod 212 and the fixed seat 211, and output a switch signal for controlling the start or shut down of the conveying motor 203 according to the relative position. Specifically, the detection rod 212 has a first position and a second position relative to the fixing seat 211. The first position and the second position are two positions along the conveying direction of the sheet 300. When the detection rod 212 is in the first position, the switch component 213 outputs a switch signal for controlling the start of the conveying motor 203. When the detection rod 212 is in the second position, the switch component 213 outputs a switch signal for controlling the shutoff of the conveying motor 203. More specifically, Figure 4 As shown, the first position is the position when the detection rod 212 is located on the left side of the fixing base 211 , and the second position is the position when the detection rod 212 is located on the right side of the fixing base 211 .

[0032] When using the above solution, the sheet material 300 is placed on the conveying roller 202 on the right side of the outside of the frame 100, and the conveying motor 203 is started to drive the sheet material 300 to be conveyed to the right. As the sheet material 300 moves to the right, its front end first passes through the processing space between the slider 110 and the support platform 120, and then touches the detection end 2120 of the detection rod 212 and pushes the detection rod 212 to move to the right, thereby pushing the detection rod 212 in the first position to the second position. After the switch component 213 detects the change in the relative position of the detection rod 212 and the fixed seat 211, it outputs a switch signal to control the conveying motor 203 to stop, so that the sheet material 300 stops being conveyed. At this time, the position of the first hole 311 to be punched in the sheet material 300 is just below the first punch 111. The slider 110 is then controlled to move downward, and the first punch 111 punches the first hole 311 in the sheet 300. The second punch 112 simultaneously punches the first connecting hole 312. The connecting hole 312 connects the first hole 311 with the front end of the sheet 300, forming a detection channel 310 with an opening at the front end. The finished product part that is punched out falls through the hole. After punching 311, the slider 110 moves upward to allow the punch to exit the hole. The detection rod 212 enters the detection channel 310 from the front end of the sheet 300 under the action of the rebound force, and resets from the second position to the first position along the detection channel. After detecting the position change, the switch assembly 213 outputs a start signal, and the conveying motor 203 restarts, driving the sheet 300 to continue moving to the right. As the sheet material 300 moves, the detection rod 212 contacts the sheet material 300 again (to the left of the first punched hole 311) and is pushed to the second position. The switch assembly 213 then turns off the conveying motor 203, precisely positioning the second punched hole 311 below the first punch 111. This cycle continues, achieving automatic, continuous, and stable conveying of the sheet material 300. Compared to manual feeding, this automatic feeding device not only improves feeding continuity and stability, but also separates the waste material into two parts during the punching process by the first and second punches 111, 112, eliminating the need for additional cutting and thus improving waste handling efficiency.

[0033] like Figure 9As shown, in order to make the slider 110 move vertically, based on the above embodiments, in some embodiments, the single-point closed press may further include a driving device 130 for driving the slider 110 to move vertically, and the driving device 130 includes a driving motor 131, a driving disk 132 and a connecting rod 133. The driving motor 131 is installed on the frame 100, and the output shaft of the driving motor 131 is coaxially fixed with the driving disk 132. One end of the connecting rod 133 is rotatably connected to the driving disk 132 through a first rotating shaft 134. The first rotating shaft 134 is connected at a position deviating from the axis of the driving disk 132. The other end of the connecting rod 133 is rotatably connected to the top of the slider 110 through a second rotating shaft 135. The slider 110 is connected to the inner side of the frame 100 through a guide rail 140. By providing the driving device 130, when the slider 110 needs to be driven to move vertically, the driving motor 131 is activated, and the driving motor 131 drives the driving disk 132 to rotate. The driving disk 132 drives the slider 110 to move along the guide rail 140 via the connecting rod 133, thereby achieving vertical reciprocating movement of the slider 110. In other embodiments, the vertical movement of the slider 110 can also be achieved by a pneumatic cylinder or a hydraulic cylinder.

[0034] like Figure 4 As shown, based on the above embodiments, in some embodiments, the first side of the first punch 111 facing the support platform 120 is the first stamping surface 1110, and the side of the second punch 112 facing the support platform 120 is the second stamping surface 1120. The vertical distance between the first stamping surface 1110 and the second stamping surface 1120 is not less than the thickness of the sheet 300. Through the above arrangement, the forming of the connecting hole 312 can be carried out after the forming of the punching hole 311. The two hole forming processes are carried out in a chronological order, thereby smoothly separating the finished product (corresponding to the first stamping surface 1110) and the waste material (corresponding to the second stamping surface 1120), reducing the trouble of subsequent cutting. Specifically, when the slider 110 drives the two punches downward, the first stamping surface 1110 of the first punch 111 first contacts the sheet 300 to complete the forming of the punching hole 311, and then the second stamping surface 1120 of the second punch contacts the sheet 300 to complete the punching of the connecting hole 312. Taking the production of automobile brake discs as an example, the circular punching hole 311 punched out by the first punch 111 corresponds to the finished brake disc, and the connecting hole 312 punched out by the second punch 112 corresponds to the waste material, and the two are blanked in sequence through the height difference design.

[0035] like Figure 4 and Figure 6As shown, based on the above embodiments, in some embodiments, the switch assembly 213 includes two conductive contacts 2130 and a conductive plate 2131. The two conductive contacts 2130 are fixed to the fixing base 211. The two conductive contacts 2130 and the conveying motor 203 are arranged in series in a circuit. Specifically, the circuit may include a power supply, the positive pole of the power supply is connected to one of the conductive contacts 2130 via a wire, the negative pole of the power supply is connected to the negative pole of the input end of the conveying motor 203 via a wire, and the positive pole of the conveying motor 203 is connected to the other conductive contact 2130 via a wire. A conductive plate 2131 is fixed to the detection rod 212, and the two conductive contacts 2130 and the conductive plate 2131 are arranged opposite each other in the transverse direction. Through the above arrangement, when the detection rod 212 is in the first position, the two conductive contacts 2130 contact the conductive plate 2131, the two conductive contacts 2130 are electrically connected via the conductive plate 2131, the conveying motor 203 is connected to the power supply, and the conveying motor 203 operates. When the detection rod 212 moves from the first position to the second position, the conductive plate 2131 separates from the two conductive contacts 2130, the two conductive contacts 2130 are disconnected, the conveying motor 203 is disconnected from the power supply, and the conveying motor 203 stops operating. In this way, the switch assembly 213 can be used to detect the relative position of the detection rod 212 and the fixing base 211, and output a switch signal for controlling the start or stop of the conveying motor 203 based on the relative position. In other embodiments, the switch assembly 213 can also be a photoelectric switch, which detects the position of the detection rod 212 and thereby controls the start or stop of the conveying motor 203.

[0036] like Figure 4 As shown, based on the above embodiments, in some embodiments, the detection rod 212 and the second punch 112 have an overlapping portion in the vertical direction, and the detection rod 212 has an extrusion inclined surface 2121 that contacts and cooperates with the second punch 112. By making the detection rod 212 and the second punch 112 have an overlapping portion in the vertical direction, the punching position of the second punch 112 on the sheet material 300 during the subsequent punching and the punching position of the first punch 111 on the sheet material 300 during the previous punching have an overlapping area in the vertical direction, which can ensure that the second punch 112 can completely punch out the connecting portion between the front and rear punching holes 311 during the subsequent punching, forming a connecting hole 312 that penetrates the two punching holes 311, so as to avoid the phenomenon that the front and rear punching holes 311 are not connected or are not completely connected. In specific implementation, when the slider 110 drives the second punch 112 to punch downward, the extrusion bevel 2121 contacts the second punch 112, and the guiding effect of the extrusion bevel 2121 causes the detection rod 212 to produce a lateral avoidance displacement to avoid structural interference with the second punch 112.

[0037] like Figure 4 and Figure 7 As shown, based on the above embodiment, in some embodiments, a roller 114 is mounted on the second punch 112, and the second punch 112 is in rolling contact with the extrusion inclined surface 2121 through the roller 114. Compared with sliding contact, rolling contact can reduce friction between the second punch 112 and the detection rod 212, thereby reducing component wear.

[0038] like Figure 7 As shown, based on the above embodiment, in some embodiments, the second punch 112 is a columnar body with a trapezoidal cross section, and the top surface of the columnar body is connected to the first punch 111. By setting the second punch 112 as a columnar body with a trapezoidal cross section, a gradually changing connecting hole 312 with a wide entrance and a narrow exit can be punched out in the sheet 300. When the detection rod 212 passes along the connecting hole 312, it can smoothly transition from the current punched hole 311 to the next punched hole 311.

[0039] like Figure 4 and Figure 6 As shown, based on the above embodiments, in some embodiments, the detection rod 212 is slidably connected to the fixing seat 211 through a slide rail 214 , and the detection rod 212 and the fixing seat 211 are elastically connected through a return spring 215 .

[0040] like Figure 8 As shown, based on the above embodiments, in some embodiments, the support platform 120 includes an upper platform 121, a lower platform 122, and connecting posts 123. The first feed hole 1210 and the second feed hole 1211 are both provided on the upper platform 121. The upper platform 121 and the lower platform 122 are fixedly connected by a plurality of connecting posts 123. With this arrangement, the finished product and waste material punched from the sheet material 300 by the first punch 111 and the second punch 112 can respectively fall through the first feed hole 1210 and the second feed hole 1211 onto the lower platform 122 for easy pickup by an operator. Furthermore, a conveyor belt (not shown) can be provided between the upper platform 121 and the lower platform 122, allowing the finished product and waste material to fall directly onto the conveyor belt and be transported to the next process (e.g., the finished product to the polishing process and the waste to the waste collection box).

[0041] like Figure 3 and Figure 8As shown, based on the above embodiments, in some embodiments, the single-point closed press with automatic feeding also includes a pneumatic component 150, the pneumatic component 150 includes a first cylinder 151 and a second cylinder 152, the cylinder body 1510 of the first cylinder and the cylinder body 1520 of the second cylinder are connected by a connecting pipe 153, the piston rod 1511 of the first cylinder is fixed to the slider 110, and the piston rod 1521 of the second cylinder is fixed to the support platform 120. Such arrangement enables the slider 110 to drive the support platform 120 to rise and fall when it moves back and forth vertically, and the slider 110 and the support platform 120 move in opposite directions. In this way, when the slider 110 moves upward, the support platform 120 descends, and the support platform 120 is separated from the bottom of the sheet 300, which can avoid friction between the sheet 300 and the support platform 120 during transportation; and when the slider 110 moves downward, the support platform 120 will rise, and the slider 110 and the support platform 120 will contact the sheet synchronously, and the support platform 120 can play the role of supporting the sheet, ensuring the smooth implementation of punching 311.

[0042] like Figure 1 、 Figure 3 and Figure 5 As shown, based on the above embodiment, in some embodiments, there are two conveying frames, namely an upper conveying frame 200 and a lower conveying frame 201, and conveying rollers 202 are provided on both the upper conveying frame 200 and the lower conveying frame 201. The upper conveying frame 200 and the lower conveying frame 201 are elastically connected by a spring device 204. Specifically, the spring device 204 may include a first connecting plate 2040, a second connecting plate 2041, a screw 2042, a nut 2043 and a compression spring 2044. The first connecting plate 2040 and the second connecting plate 2041 are respectively fixed to the upper conveying frame 200 and the lower conveying frame 201. The screw 2042 movably passes through the first connecting plate 2040 and the second connecting plate 2041 and is connected to the nut 2043. A compression spring 2044 is provided between the head of the screw 2042 and the upper conveying frame 200 and between the nut and the lower conveying frame 201, and the compression spring 2044 is sleeved on the outside of the screw 2042. The upper conveyor frame 200 and the lower conveyor frame 201 are elastically connected together through the spring device 204, so that the sheet material 300 can be clamped between the conveying roller 202 of the upper conveyor frame 200 and the conveying roller 202 of the lower conveyor frame 201 for conveying, reducing slippage during conveying and further improving the stability of conveying the sheet material 300.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A single-point closed press with automatic feeding, characterized in that: The invention comprises a frame (100), a slider (110), a support platform (120) and an automatic feeding device, wherein the slider (110) and the support platform (120) are arranged vertically inside the frame (100), a processing space is formed between the slider (110) and the support platform (120), the slider (110) is movable vertically, the slider (110) is provided with a first punch (111), the first punch (111) is used to punch a hole (311) on a sheet material (300), and the support platform (120) is provided with a punch (111) and a punch (111) connected to the first punch. (111) cooperates with a first feeding hole (1210); the automatic feeding device is used to feed the plate (300) into the processing space in a horizontal direction, wherein the horizontal direction is perpendicular to the vertical direction, and the automatic feeding device includes a conveying frame and a detection structure (210), wherein the conveying frame includes a conveying roller (202) and a conveying motor (203) for driving the conveying roller (202) to rotate; the detection structure (210) includes a fixed seat (211), a detection rod (212) and a switch assembly (213), wherein the fixed seat (211) is fixed to the frame ( 100), the detection rod (212) and the first punch (111) are arranged in sequence along the conveying direction of the sheet material (300), the detection rod (212) is elastically connected to the fixing seat (211) in the transverse direction, the first punch (111) is protruded on the side facing the detection rod (212) to form a second punch (112), the support platform (120) has a second feed hole (1211) that cooperates with the second punch (112), and the second punch (112) is used to punch out a hole connecting two adjacent holes on the sheet material (300). The punching holes (311) are connected to each other through a connecting hole (312), the connecting hole (312) and the punching holes (311) together forming a detection channel (310) on the plate (300), the detection rod (212) having a detection end (2120) inserted into the detection channel (310) and moving along the detection channel (310), and the switch assembly (213) is used to detect the relative position of the detection rod (212) and the fixing seat (211), and output a switch signal for controlling the start or stop of the conveying motor (203) according to the relative position.

2. The automatic feeding single-point closed press according to claim 1, characterized in that: The first side of the first punch (111) facing the support platform (120) is a first stamping surface (1110), and the side of the second punch (112) facing the support platform (120) is a second stamping surface (1120), and the distance between the first stamping surface (1110) and the second stamping surface (1120) in the vertical direction is not less than the thickness of the sheet material (300).

3. The automatic feeding single-point closed press according to claim 1, characterized in that: The switch assembly (213) comprises two conductive contacts (2130) and a conductive plate (2131), the two conductive contacts (2130) being fixed on the fixing seat (211), the two conductive contacts (2130) being arranged in series with the conveying motor (203) in a circuit, the conductive plate (2131) being fixed on the detection rod (212), and the two conductive contacts (2130) and the conductive plate (2131) being arranged relative to each other in the transverse direction.

4. The automatic feeding single-point closed press according to claim 1, characterized in that: The detection rod (212) and the second punch (112) have an overlapping portion in the vertical direction, and the detection rod (212) has an extrusion inclined surface (2121) that contacts and cooperates with the second punch (112).

5. The automatic feeding single-point closed press according to claim 4, characterized in that: A roller (114) is mounted on the second punch (112), and the second punch (112) is in rolling contact with the extrusion inclined surface (2121) via the roller (114).

6. The automatic feeding single-point closed press according to any one of claims 1 to 5, characterized in that: The second punch (112) is a columnar body with a trapezoidal cross section, and the top surface of the columnar body is connected to the first punch (111).

7. The automatic feeding single-point closed press according to any one of claims 1 to 5, characterized in that: The detection rod (212) is slidably connected to the fixing seat (211) via a slide rail (214), and the detection rod (212) and the fixing seat (211) are elastically connected via a return spring (215).

8. The automatic feeding single-point closed press according to any one of claims 1 to 5, characterized in that: The support platform (120) comprises an upper platform (121), a lower platform (122) and connecting columns (123); the first material passing hole (1210) and the second material passing hole (1211) are both provided on the upper platform (121); and the upper platform (121) and the lower platform (122) are fixedly connected via a plurality of connecting columns (123).

9. The automatic feeding single-point closed press according to any one of claims 1 to 5, characterized in that: The pneumatic assembly (150) is further included. The pneumatic assembly (150) includes a first cylinder (151) and a second cylinder (152). The cylinder body (1510) of the first cylinder is connected to the cylinder body (1520) of the second cylinder via a connecting pipe (153). The piston rod (1511) of the first cylinder is fixed to the slider (110), and the piston rod (1521) of the second cylinder is fixed to the support platform (120).

10. The automatic feeding single-point closed press according to any one of claims 1 to 5, characterized in that: There are two conveying racks, namely an upper conveying rack (200) and a lower conveying rack (201). The conveying rollers (202) are provided on both the upper conveying rack (200) and the lower conveying rack (201). The upper conveying rack (200) and the lower conveying rack (201) are elastically connected via a spring device (204).

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