A safety monitoring device for cold heading

Abstract

A cold heading head safety monitoring device comprises an upper connector, an elastic body, a support plate and a lower connector; a wire harness channel is arranged inside the upper connector, one end of the channel is located at the center of the lower side of the upper connector, and the other end is located on the circumferential side; the elastic body comprises four deformation bodies, which are arranged between the upper connector and the support plate, each deformation body comprises columns arranged in a 3×3 matrix, and each deformation body is provided with a sealing plate on the upper and lower sides, and two deformation bodies corresponding to any one of the outer sides of the elastic body, and the corresponding side of the middle column of the three columns on the corresponding side is provided with a resistance strain gauge, and the wire harness of the resistance strain gauge enters the wire harness channel from the lower side of the upper connector and is led out from the circumferential side of the upper connector; the upper side of the lower connector is connected to the support plate through a circumferentially inward-contracted connection column. It can monitor the stress condition of the cold heading head in real time to prevent damage caused by abnormal stress on the cold heading head.

Description

Technical Field

[0001] The utility model relates to a cold heading head safety monitoring device. Background Art

[0002] Cold heading is a processing method that utilizes the plastic deformation of metal under the action of external force, and redistributes and transfers the metal volume with the help of a mold, thereby forming the required parts or blanks. The cold heading equipment structure can be found in Chinese patent CN109079076A. During the cold heading operation, due to the matching problem between the workpiece and the mold, or the processing defects in the previous steps, the cold heading head is subjected to force displacement or even torsion. The existing cold heading equipment only has a pressure sensor, which can only detect the impact pressure of the cold heading head, and cannot detect forces in other directions. When the cold heading head is subjected to a large force displacement or receives torsion, it will cause damage to the cold heading head and related transmission parts. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a cold heading head safety monitoring device, which can monitor the stress condition of the cold heading head in real time to prevent damage caused by abnormal stress on the cold heading head.

[0004] In order to solve the above technical problems, the utility model provides a cold heading head safety monitoring device, comprising an upper connecting head, an elastic body, a supporting plate and a lower connecting head;

[0005] The upper connector is a vertically arranged cylinder, and a sensor harness channel is provided inside the upper connector, one end of the channel is located at the center of the lower side of the upper connector, and the other end of the channel is located on the circumferential side of the upper connector;

[0006] The elastic body includes four vertically arranged deformation bodies, each deformation body includes nine columns arranged in a 3×3 matrix, and the cross-section of the column is a square. The upper and lower sides of the nine columns of each deformation body are provided with square sealing plates that just cover the nine columns, and the four sealing plates on the upper side are connected to the lower side of the upper connector, and the four sealing plates on the upper side surround the wiring harness channel on the lower side of the upper connector in a square arrangement;

[0007] The elastic body composed of four deformation bodies has four outer side surfaces. For the two deformation bodies corresponding to any one of the outer side surfaces, a resistance strain gauge is provided on the corresponding side surface of the middle column among the three columns on the corresponding side, and the resistance strain gauge is located in the middle area of ​​the column in the height direction. The wire harnesses corresponding to the eight resistance strain gauges enter the wire harness channel from the lower side surface of the upper connector and are led out from the circumferential side surface of the upper connector.

[0008] The supporting plate is arranged horizontally, and the four sealing plates located at the lower side are all connected to the upper side of the supporting plate;

[0009] The lower connecting head is a vertically arranged cylinder, and the upper side of the lower connecting head is connected to the supporting plate through a circumferentially inwardly contracted connecting column.

[0010] For the purpose of simple explanation, the cold heading safety detection device described in the present utility model is referred to as the device below.

[0011] Usage method and advantages of this device: The upper connector of this device is connected to the transmission device of the cold heading equipment, and the lower connector of this device is installed with the cold heading head. When the cold heading head is subjected to force under load, the four deformable bodies in the elastic body will undergo corresponding micro-deformations, and the deformation will cause the resistance of the strain gauge itself to change. Through the principle of Wheatstone bridge, the force magnitude and the resistance change are calibrated, so that the force condition of the cold heading head can be reflected by detecting the change in the resistance value of the strain gauge. When the cold heading head works normally, the four deformable bodies are subjected to uniform force, and the magnitude of the force when subjected to force corresponds to the cold heading pressure. When the force state of the four deformable bodies changes, or the magnitude of the force is abnormal, the corresponding external control system will directly cut off the power of the cold heading equipment to prevent the cold heading head from being damaged due to accidental overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the device.

[0013] Figure 2 This is the front view of the device.

[0014] Figure 3 It is the AA cross-sectional view of the device. DETAILED DESCRIPTION

[0015] See also Figure 1-Figure 3 , a cold heading head safety monitoring device, comprising an upper connecting head 1, an elastic body, a supporting plate 2 and a lower connecting head 3;

[0016] The upper connector 1 is a vertically arranged cylinder, and a sensor harness channel 11 is provided inside the upper connector 1, one end of the channel is located at the center of the lower side of the upper connector 1, and the other end of the channel is located on the circumferential side of the upper connector 1 (in this embodiment, a dust cover 111 is provided at this part of the channel, which can be removed after installation);

[0017] The elastic body includes four vertically arranged deformation bodies 4, each deformation body 4 includes nine columns 41 arranged in a 3×3 matrix, and the cross-sectional shape of the column 41 is a square. The upper and lower sides of the nine columns 41 of each deformation body 4 are provided with square sealing plates 42 that just cover the nine columns 41, and the four sealing plates 42 located on the upper side are connected to the lower side of the upper connector 1, and the four sealing plates 42 located on the upper side surround the wiring harness channel 11 on the lower side of the upper connector 1 in a square arrangement;

[0018] The elastic body composed of four deformation bodies 4 has four outer side surfaces. For the two deformation bodies 4 corresponding to any one of the outer side surfaces, a resistance strain gauge 5 is provided on the corresponding side surface of the middle column 41 among the three columns 41 corresponding to the corresponding side, and the resistance strain gauge 5 is located in the middle area of ​​the column 41 in the height direction. The wire harnesses corresponding to the eight resistance strain gauges 5 enter the wire harness channel 11 from the lower side surface of the upper connector 1 and are led out from the circumferential side surface of the upper connector 1 (for simple explanation, the sensor corresponding wire harness is not shown in the attached drawing);

[0019] The supporting plate 2 is arranged horizontally, and the four sealing plates 42 located at the lower side are all connected to the upper side of the supporting plate 2;

[0020] The lower connecting head 3 is a vertically arranged cylinder, and the upper side of the lower connecting head 3 is connected to the supporting plate 2 via a circumferentially inwardly contracted connecting column 21 .

[0021] The use method and advantages of this device: the upper connector 1 of this device is connected to the transmission device of the cold heading equipment, and the lower connector 3 of this device is installed with the cold heading head. When the cold heading head is subjected to force under load, the four deformation bodies 4 in the elastic body will undergo corresponding slight deformation, and the deformation will cause the resistance of the strain gauge 5 itself to change. Through the principle of Wheatstone bridge, the force magnitude and the resistance change are calibrated, so that the force condition of the cold heading head can be reflected by detecting the change in the resistance value of the strain gauge 5. When the cold heading head works normally, the four deformation bodies 4 are subjected to uniform force, and the magnitude of the force when subjected to force corresponds to the cold heading pressure. When the force state of the four deformation bodies 4 changes, or the magnitude of the force is abnormal, the corresponding external control system will directly cut off the power of the cold heading equipment to prevent the cold heading head from being accidentally overloaded and causing damage (the external control system is a mature technology in this field and will not be introduced in detail here).

Claims

1. A cold heading head safety monitoring device, characterized in that: It includes an upper connecting head, an elastic body, a supporting plate and a lower connecting head; The upper connector is a vertically arranged cylinder, and a sensor harness channel is provided inside the upper connector, one end of the channel is located at the center of the lower side of the upper connector, and the other end of the channel is located on the circumferential side of the upper connector; The elastic body includes four vertically arranged deformation bodies, each deformation body includes nine columns arranged in a 3×3 matrix, and the cross-section of the column is a square. The upper and lower sides of the nine columns of each deformation body are provided with square sealing plates that just cover the nine columns, and the four sealing plates on the upper side are connected to the lower side of the upper connector, and the four sealing plates on the upper side surround the wiring harness channel on the lower side of the upper connector in a square arrangement; The elastic body composed of four deformation bodies has four outer side surfaces. For the two deformation bodies corresponding to any one of the outer side surfaces, a resistance strain gauge is provided on the corresponding side surface of the middle column among the three columns on the corresponding side, and the resistance strain gauge is located in the middle area of ​​the column in the height direction. The wire harnesses corresponding to the eight resistance strain gauges enter the wire harness channel from the lower side surface of the upper connector and are led out from the circumferential side surface of the upper connector. The supporting plate is arranged horizontally, and the four sealing plates located at the lower side are all connected to the upper side of the supporting plate; The lower connecting head is a vertically arranged cylinder, and the upper side of the lower connecting head is connected to the supporting plate through a circumferentially inwardly contracted connecting column.

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