Riveting press

Abstract

The utility model provides a riveting press which comprises a base, a supporting frame, an air cylinder, a pressure sensor, a displacement sensor, an upper die assembly, a lower die assembly and a control unit, the supporting frame is fixed on the base, the top of the supporting frame is provided with the air cylinder, the movable end of the air cylinder is connected with the upper die assembly through the pressure sensor, and the lower die assembly is fixed on the base. A workpiece to be riveted is placed on the base, and the upper die assembly moves downwards to be matched with the upper die assembly to clamp the workpiece and conduct riveting. The pressure sensor is used for measuring the acting force applied to the workpiece in the riveting process; meanwhile, the displacement sensor is used for measuring the displacement of the upper die assembly; by arranging the pressure sensor and the displacement sensor and combining with the control unit, more accurate pressure and displacement control is carried out, and the precision and stability of the riveting press are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to riveting technology field, in particular to a riveting machine. BACKGROUND

[0002] The riveting machine is a kind of equipment for connecting two or more layers of plate parts of different materials and thicknesses. It uses the instantaneous high-pressure processing process to make the plate material itself deform by cold extrusion, thereby forming an internal inlaid dot with certain tensile and shear strength without stress concentration, to realize the firm connection between the plate parts. The riveting machine has no requirements on the surface of the plate parts, and the original plating layer and paint layer on the surface of the plate parts at the connection point are not damaged, so the riveting machine is widely used in various fields such as automobile manufacturing, aerospace and electronic equipment.

[0003] The pressure system of the riveting machine is composed of a hydraulic or pneumatic system to generate the required pressure. For traditional riveting machines, the control mode is single, and the riveting is controlled by fixed displacement. The extension end of the cylinder is extended to a fixed displacement, pressurized and riveted. The riveting size can only be adjusted by tooling, and the cylinder stroke cannot be automatically adjusted. Because the workpiece to be riveted has different materials and sizes, the required cylinder pressure and stroke need to be determined for different workpieces. This process is usually determined by manual experience, which is time-consuming and labor-intensive, has great uncertainty, and the riveting process cannot know the specific value of the pressure value, so it is difficult to ensure the accuracy and stability of the riveting machine to ensure product quality. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a riveting machine, which comprises a base and a support frame fixed above the base, a cylinder is installed on the top of the support frame, the movable end of the cylinder can move up and down in the vertical direction, the movable end of the cylinder is connected with a pressure sensor, a connecting rod and an upper die assembly in turn from top to bottom, a limiting plate is arranged around the connecting rod and is arranged horizontally, a plurality of limiting cylinders are arranged on the edge of the limiting plate, and a limiting rod fixed on the base penetrates the limiting cylinders upward to prevent left and right deviation during up and down movement. The pressure sensor is used to measure the force applied to the workpiece.

[0005] A lower die assembly is fixed on the base, and the workpiece to be riveted is placed on the base. The upper die assembly moves downward to clamp the workpiece with the lower die assembly and performs riveting.

[0006] Optionally, the riveting machine further comprises a displacement sensor fixed on the edge of the support frame, and the displacement sensor is used to measure the distance change between the support frame and the up and down moving limiting plate, so as to obtain the displacement of the upper die assembly.

[0007] Optionally, the displacement sensor is a laser displacement sensor.

[0008] Optionally, the riveting press further comprises a control unit, the control unit being in communication connection with the air cylinder, the pressure sensor and the displacement sensor, so as to adjust the stroke of the air cylinder according to the measured values of the pressure sensor and the displacement sensor.

[0009] Optionally, the control unit is a PLC.

[0010] Optionally, the riveting press further comprises an alarm unit, the alarm unit being in communication connection with the control unit, so as to perform real-time monitoring and alarm when the actual values measured by the pressure sensor and the displacement sensor deviate from the set values within a certain range.

[0011] Optionally, the riveting press further comprises a display unit, the display unit being used for displaying the actual values measured by the pressure sensor and the displacement sensor in real time.

[0012] Optionally, the four corners of the base are provided with supporting legs through bolts, and the base is leveled through the supporting legs.

[0013] Optionally, the base is fixed to the cabinet through the supporting legs.

[0014] As described above, the riveting press comprises a base, a supporting frame, an air cylinder, a pressure sensor, a displacement sensor, an upper die assembly, a lower die assembly and a control unit, the supporting frame is fixed to the base, the top of the supporting frame is provided with the air cylinder, the movable end of the air cylinder is connected to the upper die assembly through the pressure sensor, the lower die assembly is fixed to the base, the workpiece to be riveted is placed on the base, the upper die assembly moves downward to clamp the workpiece in cooperation with the upper die assembly and performs riveting. The pressure sensor is used for measuring the acting force applied to the workpiece during riveting, and the displacement sensor is used for measuring the displacement of the upper die assembly; by arranging the pressure sensor and the displacement sensor and combining the control unit, more accurate pressure and displacement control can be performed, so as to ensure the accuracy and stability of the riveting press. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 shows the structure of the riveting press according to the first embodiment of the present application.

[0016] Figure 2 Fig. 2 shows the structure of the riveting press with a displacement sensor according to the first embodiment of the present application.

[0017] ELEMENT REFERENCE

[0018] 10 base

[0019] 11 supporting frame

[0020] 12 air cylinder

[0021] 13 pressure sensor

[0022] 14 connecting rod

[0023] 15 upper die assembly

[0024] 16 stop plate

[0025] 17 stop rod

[0026] 18 lower die assembly

[0027] 19 displacement sensor

[0028] 20 cabinet DETAILED DESCRIPTION

[0029] The above objects and other advantages of the present application will become more apparent by describing in detail the only embodiment thereof as shown in the drawings in which:

[0030] In describing the embodiment of the present application, the sectional view of the device structure may, for the convenience of description, be partially enlarged without the general proportion, and the schematic view is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0031] For the convenience of description, spatial relationship words such as "under", "below", "lower than", "under", "above", "upper" and the like may be used herein to describe the relationship of one element or feature shown in the drawings with other elements or features. It will be understood that these spatial relationship words are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as "between" two layers, it can be the only layer between the two layers, or one or more intervening layers can also be present. "Between" used herein includes both end point values.

[0032] In the context of the present application, the structure described as the first feature "above" the second feature can include the embodiment in which the first and second features are formed in direct contact, and can also include the embodiment in which another feature is formed between the first and second features, so that the first and second features can not be in direct contact.

[0033] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a riveting machine, which includes a base 10 and a support frame 11 fixed above the base 10. A cylinder 12 is installed on the top of the support frame 11. The movable end of the cylinder 12 can move up and down in the vertical direction. A pressure sensor 13, a connecting rod 14, and an upper mold assembly 15 are connected downwards sequentially to the movable end of the cylinder 12. A horizontally arranged limiting plate 16 is sleeved around the connecting rod 14. Multiple limiting cylinders are opened on the edge of the limiting plate 16. A limiting rod 17 fixed on the base 10 passes upwards through the limiting cylinders to prevent left and right deviation during up and down movement. The pressure sensor 13 is used to measure the force applied to the workpiece.

[0036] The lower mold assembly 18 is fixed on the base 10. The workpiece to be riveted is placed on the base 10. The upper mold assembly 15 moves downward and cooperates with the lower mold assembly 18 to clamp the workpiece and perform riveting.

[0037] Furthermore, the riveting machine also includes a displacement sensor 19 fixed to the edge of the support frame 11. The displacement sensor is used to measure the distance change between the support frame 11 and the vertically moving limiting plate 16, thereby determining the displacement of the upper mold assembly 15. Preferably, the displacement sensor is a laser displacement sensor, which can accurately and non-contactly measure changes in the position and displacement of the object being measured. It is mainly used for measuring geometric quantities such as displacement, thickness, vibration, distance, and diameter of the object. The laser emitter projects a visible red laser beam onto the surface of the object being measured through a lens. The laser beam reflected by the object passes through the receiver lens and is received by the internal CCD linear camera, allowing the digital signal processor to calculate the distance between the sensor and the object being measured.

[0038] Further, the riveting machine further comprises a control unit, which is in communication connection with the air cylinder, the pressure sensor and the displacement sensor. The pressure sensor is used to monitor the applied pressure in real time, and the control unit controls the stroke of the air cylinder through software programming. The return stroke pressure can be set, and the equipment returns when the set return stroke pressure is reached. The riveting force corresponding to different riveting sizes can be verified through the pressure control method, so that the riveting size can be more accurately controlled, and the pressing force requirement can be ensured. Similarly, the displacement sensor is used to monitor the displacement change during riveting in real time, and the control unit controls the stroke of the air cylinder through software programming. The return stroke distance can be set, and the equipment returns when the set return stroke distance is reached.

[0039] The pressure sensor and the displacement sensor are arranged to control the pressure and the displacement more accurately. After the parts are riveted, the riveting force and the displacement of each product are recorded by the program, so that the whole riveting process is stable and controllable, the accuracy and stability of the riveting machine are ensured, and the control unit is a PLC.

[0040] Further, the riveting machine further comprises an alarm unit, which monitors and alarms in real time when the actual value measured by the pressure sensor and the displacement sensor deviates from the set value by a certain range, the alarm unit is in communication connection with the control unit, and the alarm unit is an audible and visual alarm.

[0041] Further, the riveting machine further comprises a display unit, which is used to display the actual value measured by the pressure sensor and the displacement sensor in real time, and the display unit is in communication connection with the control unit.

[0042] Further, the four corners of the base 10 are connected with supporting legs through bolts, and the base is leveled through the supporting legs.

[0043] Further, the base 10 is fixed to the cabinet through the supporting legs, the cabinet is used to lift the height of the riveting machine, and can provide accommodation space for electrical components such as the control unit, switches and cables.

[0044] In summary, the riveting machine comprises a base, a supporting frame, an air cylinder, a pressure sensor, a displacement sensor, an upper die assembly, a lower die assembly and a control unit. The supporting frame is fixed to the base, the top of the supporting frame is provided with the air cylinder, the movable end of the air cylinder is connected with the upper die assembly through the pressure sensor, the lower die assembly is fixed to the base, and the workpiece to be riveted is placed on the base. The upper die assembly moves downward to clamp the workpiece and rivet. The pressure sensor is used to measure the force applied to the workpiece during riveting. The displacement sensor is used to measure the displacement of the upper die assembly. The pressure sensor and the displacement sensor are arranged to control the pressure and the displacement more accurately, and the control unit is used to ensure the accuracy and stability of the riveting machine.

[0045] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A riveting press, characterized in that, The riveting machine comprises a base and a support frame fixed above the base, a cylinder is mounted on the top of the support frame, the movable end of the cylinder can move up and down in the vertical direction, the movable end of the cylinder is connected with a pressure sensor, a connecting rod and an upper die assembly in sequence from top to bottom, the connecting rod is surrounded by a horizontally arranged limiting plate, a plurality of limiting cylinders are arranged on the edge of the limiting plate, a limiting rod fixed on the base penetrates the limiting cylinders upward to prevent left-right deviation during up-down movement; The pressure sensor is used for measuring the acting force applied on the workpiece; A lower die assembly is fixed on the base, the workpiece to be riveted is placed on the base, the upper die assembly moves downward to clamp the workpiece in cooperation with the lower die assembly and performs riveting.

2. The riveter of claim 1, wherein: The riveting machine further comprises a displacement sensor fixed on the edge of the support frame, the displacement sensor is used for measuring the distance change between the support frame and the up-down moving limiting plate, so as to obtain the displacement of the upper die assembly.

3. The riveter of claim 2, wherein: The displacement sensor is a laser displacement sensor.

4. The riveter of claim 2, wherein: The riveting machine further comprises a control unit, the control unit is in communication connection with the cylinder, the pressure sensor and the displacement sensor, so as to adjust the stroke of the cylinder according to the measured values of the pressure sensor and the displacement sensor.

5. The riveter of claim 4, wherein: The control unit is a PLC.

6. The riveter of claim 4, wherein: The riveting machine further comprises an alarm unit, the alarm unit is in communication connection with the control unit, when the actual values measured by the pressure sensor and the displacement sensor deviate from the set values within a certain range, real-time monitoring and alarm are performed.

7. The riveter of claim 1, wherein: The riveting machine further comprises a display unit, the display unit is used for displaying the actual values measured by the pressure sensor and the displacement sensor in real time.

8. The riveter of claim 1, wherein: Supporting legs are connected to the four corners of the base through bolts, and the base is leveled through the supporting legs.

9. The riveter of claim 1, wherein: The base is fixed on the cabinet through the supporting legs.

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