CN111618151A

CN111618151A - Stamping equipment suitable for plate-shaped metal workpiece and stamping control method thereof

Info

Publication number: CN111618151A
Application number: CN202010742142.0A
Authority: CN
Inventors: 浦巧生
Original assignee: Wujiang Hydraulic Components Foundry Co Ltd
Current assignee: Wujiang Hydraulic Components Foundry Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2020-09-04
Anticipated expiration: 2040-07-29
Also published as: CN111618151B

Abstract

The application discloses stamping equipment and punching press control method suitable for plate-like metal work piece, stamping equipment includes: the device comprises a main hydraulic device, a punch, a top plate, a buffer device, a mounting plate, a support column, a detection device, a lower die holder, a cylinder holder, a lower die plate, a plurality of heightening piston columns, a push-out piston rod and a bottom plate; the main hydraulic device drives the punch to move and simultaneously drives the detection device to move and detect the area below the punch, and the buffer device is installed on the installation plate and the top plate so as to ensure that the punching action is stably carried out. The positions of the lower die holder, the cylinder base and the lower die plate can be relatively adjusted, so that the functions of stroke adjustment and material pushing-out are realized. The press control method includes: and when no foreign matter exists below the punch and the punch, the lower die holder and the lower die plate are in preset positions, the punching action is executed. The stamping equipment and the stamping control method have the advantages that the stamping equipment is adjustable in stamping stroke and capable of monitoring the stamping area, and the stamping equipment is suitable for the plate-shaped metal workpiece.

Description

Stamping equipment suitable for plate-shaped metal workpiece and stamping control method thereof

Technical Field

The invention relates to a stamping device and a stamping method thereof, in particular to a stamping device suitable for a plate-shaped metal workpiece and a stamping control method thereof, and belongs to the technical field of metal stamping.

Background

The stamping is a forming method in which a press and a die are used to apply external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) of a desired shape and size.

The stamping process is a production technology for obtaining a product workpiece with certain shape, size and performance by directly applying a deformation force to a plate in a die by means of the power of conventional or special stamping equipment and deforming the plate.

The existing punching processing equipment, especially for the plate-shaped metal workpiece, usually adopts a punch with higher speed to perform punching processing, so that the requirement on an operator of a punching machine is high, and although corresponding protective measures or equipment are provided in the related art, due to the processing mechanism of the punching machine, the safety risk still exists when the speed of the punch is higher.

In addition, when the plate-shaped metal is punched, high punching speed is not needed, pressure is needed when the plate-shaped metal is punched and assembled, the pressure needs to be matched with a punch progress, and the existing punching equipment is simple in punching action and cannot realize complex punching processing.

Disclosure of Invention

A stamping apparatus adapted for use with a sheet metal workpiece, comprising: the device comprises a main hydraulic device, a punch, a top plate, a buffer device, a mounting plate, a support column, a detection device, a lower die holder, a cylinder holder, a lower die plate, a plurality of heightening piston columns, a push-out piston rod and a bottom plate; the main hydraulic device comprises a main hydraulic cylinder and a main hydraulic rod, and the main hydraulic cylinder is fixedly arranged above the top plate; the main hydraulic rod and the main hydraulic cylinder form sliding connection, and the bottom end of the main hydraulic rod penetrates through the top plate and then is connected to the mounting plate; the punch is arranged below the mounting plate; the buffer device includes: the buffer guide rod, the buffer spiral spring and the buffer cylinder barrel are arranged in the cylinder body; the top plate is provided with a through hole for the buffer guide rod to pass through; the buffer guide rod penetrates through the through hole and is in sliding connection with the top plate along the vertical direction; the buffer guide rod is provided with a buffer rod cavity, the top of the buffer rod cavity is closed, and the bottom of the buffer rod cavity is provided with a cavity opening; the buffer cylinder barrel is provided with a buffer cylinder barrel cavity, the bottom of the buffer cylinder barrel is closed, and the top of the buffer cylinder barrel cavity is provided with a cavity opening; the bottom of the buffer guide rod is arranged in the buffer cylinder cavity of the buffer cylinder barrel and is in sliding connection with the buffer cylinder barrel along the vertical direction; the bottom of the buffer cylinder barrel is fixedly connected to the mounting plate; the buffer spiral spring is arranged at the top of the top plate, the buffer guide rod penetrates through the buffer spiral spring, the top of the buffer guide rod is provided with a guide rod limiting structure, and two ends of the buffer spiral spring respectively abut against the top plate and the guide rod limiting structure; the detection device comprises: the camera comprises a motor, a linkage plate, a guide sleeve, a transmission screw rod, a transmission nut, a telescopic arm and a camera, wherein the motor is fixedly connected to the top of the linkage plate; the linkage plate is fixedly connected to the mounting plate so that the linkage plate and the mounting plate can be lifted synchronously; the guide sleeve is provided with a guide cavity, the transmission screw rod is at least partially arranged in the guide cavity and can rotate relative to the guide sleeve, and the top of the transmission screw rod and a motor bearing of the motor form rotation stopping connection so that the motor drives the transmission screw rod to rotate; the transmission nut is arranged in the guide cavity of the guide sleeve and is sleeved and matched with the transmission screw rod, and the transmission nut and the guide sleeve form rotation stopping connection; the top of the telescopic arm is inserted into the guide cavity of the guide sleeve and is in sliding connection with the guide sleeve along the vertical direction, the bottom of the telescopic arm is arranged outside the guide cavity, and the top of the telescopic arm is fixedly connected to the transmission nut so that the telescopic arm can synchronously move along with the transmission nut; the camera is arranged at the bottom of the telescopic arm; the lower die base is provided with a die cavity, and the lower template is arranged in the die cavity and can move up and down in the die cavity; the cylinder base is provided with a height-adjusting cylinder cavity and a push-out cylinder cavity; the bottom of the heightening piston column is slidably arranged in the heightening cylinder cavity, and the top of the heightening piston column is connected to the bottom of the die holder; the bottom of the push-out piston rod is arranged in the push-out cylinder cavity in a sliding manner, and the top of the push-out piston rod penetrates through the lower die base and is connected to the bottom of the lower die plate; the lower die base and the cylinder base are connected in a sliding mode along the vertical direction, the lower die base is provided with a die base limiting structure, and the cylinder base is provided with a cylinder base limiting structure matched with the die base limiting structure so as to limit the relative sliding of the lower die base and the cylinder base; the cylinder seat is fixedly connected above the bottom plate.

Furthermore, the cylinder base is provided with a heightening cylinder pipe which is communicated with the heightening cylinder cavity to be connected with an external pressure source.

Further, the cylinder base is provided with a push-out cylinder pipe, and the push-out cylinder pipe is communicated with the push-out cylinder cavity to be connected with an external pressure source.

Further, the direction of movement of the heightening piston rod is parallel to the running direction of the push-out piston rod.

Further, the push-out piston rod portion is disposed between the two heightening piston columns.

Further, the press apparatus adapted to the plate-shaped metal workpiece further includes: and the supporting spiral spring is arranged between the cylinder seat and the lower die seat.

Further, the heightening piston post passes through the supporting coil spring.

Further, the raising cylinder chamber is connected to a hydraulic pressure source.

Further, the push-out cylinder chamber is connected to a source of pneumatic pressure.

Further, the camera is an infrared camera.

As another aspect of the present application, there is provided a press control method based on the above-described press apparatus adapted to a plate-shaped metal workpiece. The stamping control method comprises the following steps: the camera collects images below the punch; judging whether foreign matters exist in the image acquired by the camera; detecting the positions of the punch, the lower die holder and the lower die plate; judging whether the punch, the lower die holder and the lower die plate are in preset positions or not; and when no foreign matter exists in the image and the punch, the lower die holder and the lower die plate are in the preset positions, executing the punching action.

The application has the advantages that: provided are a punching device which is applicable to a plate-shaped metal workpiece and has an adjustable punching stroke and can monitor a punching area, and a punching control method thereof.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

FIG. 1 is a schematic structural view of a stamping apparatus adapted for use with a sheet metal workpiece according to one embodiment of the present application;

FIG. 2 is a schematic partial cross-sectional view of the embodiment of FIG. 1;

FIG. 3 is a schematic structural diagram of the detecting device in the embodiment shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a part of the detecting device in the embodiment shown in FIG. 1;

FIG. 5 is a block diagram illustrating steps of a press control method according to one embodiment of the present application.

The meaning of the reference symbols in the figures:

the stamping device is suitable for plate-shaped metal workpieces and comprises a stamping device 100, a main hydraulic device 101, a main hydraulic cylinder 1011, a main hydraulic rod 1012, a punch 102, a top plate 103, a buffer device 104, a buffer guide rod 1041, a buffer spiral spring 1042, a buffer cylinder barrel 1043, a mounting plate 105, a support column 106, a detection device 107, a motor 1071, a linkage plate 1072, a guide sleeve 1073, a transmission screw 1074, a transmission nut 1075, a telescopic arm 1076, a camera 1077, a lower die holder 108, a die cavity 1081, a cylinder base 109, an elevation cylinder cavity 1091, an elevation cylinder cavity 1092, an elevation cylinder tube 1093, an elevation cylinder tube 1094, a lower die plate 110, an elevation piston column 111, an elevation piston rod 112, a bottom plate 113 and a support spiral spring 114.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 4, a press apparatus 100 adapted to a plate-shaped metal workpiece includes: the device comprises a main hydraulic device 101, a punch 102, a top plate 103, a buffer device 104, a mounting plate 105, a support column 106, a detection device 107, a lower die holder 108, a cylinder holder 109, a lower die plate 110, a plurality of heightening piston columns 111, a push-out piston rod 112 and a bottom plate 113.

Wherein the top plate 103, bottom plate 113 and support posts 106 form the apparatus frame to support the rest of the apparatus. Specifically, the support column 106 is disposed between the top plate 103 and the bottom plate 113 so as to have a certain space therebetween.

The main hydraulic device 101 includes: a master cylinder 1011 and a master cylinder 1012. The main hydraulic device 101 is mainly used to perform a main pressing operation in the pressing process and provide a pressing force required for the pressing.

The main hydraulic cylinder 1011 is fixedly arranged above the top plate 103, the main hydraulic rod 1012 and the main hydraulic cylinder 1011 form sliding connection, and the bottom end of the main hydraulic rod 1012 penetrates through the top plate 103 and then is connected to the mounting plate 105; the punch 102 is mounted to the underside of the mounting plate 105. The mounting plate 105 functions primarily to mount the punch 102 so that the punch 102 can be driven by the main hydraulic ram 1012. In operation, the ram 102 is controlled to move by controlling the hydraulic pressure source connected to the master cylinder 1011.

Preferably, the master cylinder 1011 is connected to an oil pressure device in order to obtain sufficient punching power.

As shown in fig. 2, the buffer device 104 includes: a buffer guide 1041, a buffer coil spring 1042 and a buffer cylinder 1043. As a specific scheme, the top plate 103 is provided with a through hole for the buffer guide rod 1041 to pass through; the buffer guide rod 1041 penetrates through the through hole and is in sliding connection with the top plate 103 along the vertical direction; the buffer guide rod 1041 is provided with a buffer rod cavity, the top of the buffer rod cavity is closed, and the bottom of the buffer rod cavity is provided with a cavity opening; the buffer cylinder barrel 1043 is provided with a buffer cylinder barrel cavity, the bottom of the buffer cylinder barrel 1043 is closed, and the top of the buffer cylinder barrel cavity is provided with a cavity opening; the bottom of the buffer guide rod 1041 is arranged inside the buffer cylinder cavity of the buffer cylinder 1043 and is in sliding connection with the buffer cylinder 1043 along the vertical direction; the bottom of the cushion cylinder 1043 is fixedly connected to the mounting plate 105; the buffer coil spring 1042 is arranged on the top of the top plate 103, the buffer guide rod 1041 penetrates through the buffer coil spring 1042, the top of the buffer guide rod 1041 is provided with a guide rod limiting structure, and two ends of the buffer coil spring 1042 respectively abut against the top plate 103 and the guide rod limiting structure.

The buffer 104 is used to buffer the impact of the punch 102 when the punch 102 is pressed down and lifted up against the mounting plate 105. This application stamping equipment mainly needs be when the drift 102 gets into die cavity 1081 back contact plate-like work piece pressure, be different from and drive drift 102 by motor 1071 and need the speed of equivalence just can accomplish the punching press, this application stamping equipment then need not faster punching press speed and obtain corresponding pressure. Since the master cylinder 1011 requires a large pressing force, a buffering process is required when the hydraulic driving direction is changed so as not to affect the life of the apparatus by a large acting force.

The buffer rod cavity and the buffer cylinder cavity are filled with buffer solution after being communicated, so that the buffer is further buffered by the liquid flowing pressure.

As shown in fig. 3, the detection device 107 includes: motor 1071, linkage board 1072, uide bushing 1073, transmission lead screw 1074, drive nut 1075, telescopic arm 1076 and camera 1077. Wherein, the motor 1071 is fixedly connected to the top of the linkage plate 1072; the linkage plate 1072 is fixedly connected to the mounting plate 105 so that the linkage plate 1072 and the mounting plate 105 can be synchronously lifted; the guide sleeve 1073 is provided with a guide cavity, the transmission screw 1074 is at least partially arranged in the guide cavity and can rotate relative to the guide sleeve 1073, and the top of the transmission screw 1074 and a motor 1071 bearing of the motor 1071 form a rotation stopping connection so that the motor 1071 drives the transmission screw 1074 to rotate; the transmission nut 1075 is arranged in the guide cavity of the guide sleeve 1073 and is sleeved and matched with the transmission screw 1074, and the transmission nut 1075 and the guide sleeve 1073 form rotation stopping connection; the top of the telescopic arm 1076 is inserted into the guide cavity of the guide sleeve 1073 and the telescopic arm 1076 and the guide sleeve 1073 form a sliding connection along the vertical direction, the bottom of the telescopic arm 1076 is arranged outside the guide cavity, and the top of the telescopic arm 1076 is fixedly connected to the transmission nut 1075 so that the telescopic arm 1076 moves synchronously with the transmission nut 1075; the camera 1077 is mounted at the bottom of the telescopic arm 1076.

With this arrangement, the position of the camera 1077 can be adjusted by movement of the telescopic arm 1076, which allows the position of the camera 1077 to be adjusted according to the particular stamping process and the variation in the stroke of the punch 102 and the position of the lower die bed 108. Meanwhile, after the position of the camera 1077 is adjusted, the camera 1077 synchronously ascends and descends along with the linkage plate 1072 to detect the area below the punch 102, the detected picture is sent to a control device for judgment, if no abnormal object such as an arm of an operator exists in the picture, the punching area is considered to be safe, so that the punch 102 is controlled to start punching, the area below the punch 102 is monitored all the time in the punching process, and the punching safety is ensured.

Alternatively, as shown in fig. 4, the drive nut 1075 may be slotted and the guide sleeve 1073 may be provided with projections that cooperate to guide the sliding movement of the drive nut 1075.

As shown in fig. 2, the lower mold base 108 is provided with a mold cavity 1081, and the lower mold plate 110 is arranged in the mold cavity 1081 and can move up and down in the mold cavity 1081; the cylinder base 109 is formed with a heightening cylinder cavity 1091 and a pushing cylinder cavity 1092; the bottom of the heightening piston column 111 is slidably arranged in the heightening cylinder cavity 1091, and the top of the heightening piston column 111 is connected to the bottom of the die holder; the bottom of the push-out piston rod 112 is slidably arranged in the push-out cylinder cavity 1092, and the top of the push-out piston rod 112 passes through the lower die holder 108 and is connected to the bottom of the lower die plate 110; the lower die base 108 and the cylinder base 109 are connected in a sliding mode along the vertical direction, the lower die base 108 is provided with a die base limiting structure, and the cylinder base 109 is provided with a cylinder base 109 limiting structure matched with the die base limiting structure to limit the relative sliding of the lower die base 108 and the cylinder base 109; the cylinder base 109 is fixedly attached above the base plate 113.

The heightening piston column 111 can adjust the position of the die cavity 1081, and the lower die plate 110 can be adjusted synchronously, so that the device can be suitable for different processes with different stamping strokes. After the punching process is completed, the lower die plate 110 is pushed out by the push-out piston rod 112 to eject the workpiece, thereby facilitating the operator to take out and replace the workpiece.

As an extension, a pressure sensor is disposed below the lower template 110, and can detect that the lower template 110 receives pressure. In addition, in order to ensure the position of the lower die holder 108 to be fixed, the punching apparatus 100 adapted to the plate-shaped metal workpiece further includes: and a supporting coil spring 114, wherein the supporting coil spring 114 is arranged between the cylinder seat 109 and the lower die seat 108 to support the lower die seat 108. During ram pressure, the hydraulic pressure in the raise cylinder chamber 1091 remains constant to determine the position of the lower die holder 108. As a specific scheme, a first position sensor is arranged at the punch 102, a second position sensor is arranged at the lower die holder 108, and a third position sensor is arranged at the lower die plate 110. The control device judges whether the punching stroke is satisfied according to the relative distance of the first position sensor, the second position sensor and the third position sensor, thereby controlling the position of the punch 102 and the positions of the lower die holder 108 and the lower die plate 110 so as to ensure the processing precision.

Specifically, the cylinder base 109 is provided with an increase cylinder tube 1093, and the increase cylinder tube 1093 is communicated with the increase cylinder cavity 1091 to be connected with an external pressure source. The cylinder base 109 is provided with a push-out cylinder tube 1094, and the push-out cylinder tube 1094 is communicated with a push-out cylinder cavity 1092 so as to be connected with an external pressure source. The direction of movement of the heightening piston rod 111 is parallel to the running direction of the push-out piston rod 112. The push-out piston rod 112 is disposed at least between the two heightening piston columns 111. The raising cylinder chamber 1091 is connected to a source of hydraulic pressure. The throw cylinder chamber 1092 is connected to a source of pneumatic pressure.

The use of the cylinder block 109 to construct the cylinder chamber is more pressure tolerant and space efficient than the use of separate hydraulic piston rod arrangements alone.

As shown in fig. 5, based on the above scheme, as a preferred scheme, the present application provides a stamping control method, which specifically includes the following steps: the camera 1077 collects images below the punch 102; judging whether foreign matters exist in the image acquired by the camera 1077; detecting the positions of the punch 102, the lower die holder 108 and the lower die plate 110; judging whether the punch 102, the lower die holder 108 and the lower template 110 are in preset positions; when there is no foreign matter in the image and the punch 102, the lower die bed 108 and the lower die plate 110 are in the preset positions, the punching action is performed.

Specifically, the camera 1077 detects the area below the punch 102: judging whether an object with potential safety hazard exists, if so, alarming and keeping the punch 102 to prevent the punch from downwards punching, and if not, acquiring the positions of a first position sensor, a second position sensor and a third position sensor; and judging whether the first position sensor, the second position sensor and the third position sensor meet preset conditions, if so, performing stamping action, and if not, driving an air source to adjust the positions of the punch 102, the lower die holder 108 and the lower die plate 110.

After punching is finished, the positions of the first position sensor, the second position sensor and the third position sensor are detected, whether preset conditions are met or not is judged, if yes, a user is prompted to complete punching, and if not, the user is provided that the punching problem possibly exists. Therefore, the user can take the prompted workpiece to the special die for trimming.

In a specific embodiment, the camera 1077 is an infrared camera 1077. Therefore, the image judgment difficulty can be reduced, the time consumption can be reduced, and the efficiency can be improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stamping apparatus suitable for sheet metal workpieces, characterized by:

the stamping apparatus for sheet metal workpieces comprises: the device comprises a main hydraulic device, a punch, a top plate, a buffer device, a mounting plate, a support column, a detection device, a lower die holder, a cylinder holder, a lower die plate, a plurality of heightening piston columns, a push-out piston rod and a bottom plate; the main hydraulic device comprises a main hydraulic cylinder and a main hydraulic rod, and the main hydraulic cylinder is fixedly arranged above the top plate; the main hydraulic rod and the main hydraulic cylinder form sliding connection, and the bottom end of the main hydraulic rod penetrates through the top plate and then is connected to the mounting plate; the punch is mounted below the mounting plate; the buffer device includes: the buffer guide rod, the buffer spiral spring and the buffer cylinder barrel are arranged in the cylinder body; the top plate is provided with a through hole for the buffer guide rod to pass through; the buffer guide rod penetrates through the through hole and is in sliding connection with the top plate along the vertical direction; the buffer guide rod is provided with a buffer rod cavity, the top of the buffer rod cavity is closed, and the bottom of the buffer rod cavity is provided with a cavity opening; the buffer cylinder barrel is provided with a buffer cylinder barrel cavity, the bottom of the buffer cylinder barrel is closed, and the top of the buffer cylinder barrel cavity is provided with a cavity opening; the bottom of the buffer guide rod is arranged in a buffer cylinder cavity of the buffer cylinder barrel and is in sliding connection with the buffer cylinder barrel along the vertical direction; the bottom of the buffer cylinder barrel is fixedly connected to the mounting plate; the buffer spiral spring is arranged at the top of the top plate, the buffer guide rod penetrates through the buffer spiral spring, a guide rod limiting structure is arranged at the top of the buffer guide rod, and two ends of the buffer spiral spring respectively abut against the top plate and the guide rod limiting structure; the detection device includes: the camera comprises a motor, a linkage plate, a guide sleeve, a transmission screw rod, a transmission nut, a telescopic arm and a camera, wherein the motor is fixedly connected to the top of the linkage plate; the linkage plate is fixedly connected to the mounting plate so that the linkage plate and the mounting plate can be lifted synchronously; the guide sleeve is provided with a guide cavity, at least part of the transmission screw rod is arranged in the guide cavity and can rotate relative to the guide sleeve, and the top of the transmission screw rod and a motor bearing of the motor form rotation stopping connection so that the motor drives the transmission screw rod to rotate; the transmission nut is arranged in the guide cavity of the guide sleeve and is matched with the transmission screw rod in a sleeved mode, and the transmission nut and the guide sleeve form rotation stopping connection; the top of the telescopic arm is inserted into the guide cavity of the guide sleeve and is in sliding connection with the guide sleeve along the vertical direction, the bottom of the telescopic arm is arranged outside the guide cavity, and the top of the telescopic arm is fixedly connected to the transmission nut so that the telescopic arm can synchronously move along with the transmission nut; the camera is arranged at the bottom of the telescopic arm; the lower die base is provided with a die cavity, and the lower template is arranged in the die cavity and can move up and down in the die cavity; the cylinder base is provided with a height-adjusting cylinder cavity and a push-out cylinder cavity; the bottom of the heightening piston column is slidably arranged in the heightening cylinder cavity, and the top of the heightening piston column is connected to the bottom of the die holder; the bottom of the push-out piston rod is arranged in the push-out cylinder cavity in a sliding mode, and the top of the push-out piston rod penetrates through the lower die base and is connected to the bottom of the lower die plate; the lower die base and the cylinder base are connected in a sliding mode along the vertical direction, the lower die base is provided with a die base limiting structure, and the cylinder base is provided with a cylinder base limiting structure matched with the die base limiting structure so as to limit the relative sliding of the lower die base and the cylinder base; the cylinder base is fixedly connected above the bottom plate.

2. Stamping apparatus suitable for sheet metal workpieces, according to claim 1, characterized in that:

the cylinder base is provided with a height-adjusting cylinder pipe, and the height-adjusting cylinder pipe is communicated with the height-adjusting cylinder cavity to be connected with an external pressure source.

3. Stamping apparatus suitable for sheet metal workpieces, according to claim 2, characterized in that:

the cylinder base is provided with a push-out cylinder pipe, and the push-out cylinder pipe is communicated with the push-out cylinder cavity to be connected with an external pressure source.

4. A stamping apparatus suitable for sheet metal workpieces as defined in claim 3, wherein:

the movement direction of the heightening piston column is parallel to the running direction of the push-out piston rod.

5. Stamping apparatus suitable for sheet metal workpieces, according to claim 4, characterized in that:

the push-out piston rod part is arranged between the two heightening piston columns.

6. Stamping apparatus suitable for sheet metal workpieces, according to claim 5, wherein:

the stamping apparatus for sheet metal workpieces further comprises: and the supporting spiral spring is arranged between the cylinder seat and the lower die seat.

7. Stamping apparatus suitable for sheet metal workpieces, according to claim 6, characterized in that:

the heightening piston column penetrates through the supporting coil spring.

8. Stamping apparatus suitable for sheet metal workpieces, according to claim 7, wherein:

the raising cylinder chamber is connected to a hydraulic pressure source.

9. Stamping apparatus suitable for sheet metal workpieces, according to claim 8, wherein:

the push-out cylinder chamber is connected to a source of pneumatic pressure.

10. Stamping apparatus suitable for sheet metal workpieces, according to claim 9, wherein:

the camera is an infrared camera.

11. A press control method using the press apparatus for a sheet-metal workpiece according to any one of claims 1 to 10, characterized in that:

the stamping control method comprises the following steps:

the camera collects images below the punch;

judging whether foreign matters exist in the image acquired by the camera;

detecting the positions of the punch, the lower die holder and the lower die plate;

judging whether the punch, the lower die holder and the lower die plate are in preset positions or not;

and when no foreign matter exists in the image and the punch, the lower die holder and the lower die plate are in preset positions, executing a punching action.