Press collapse type overload warning device
By designing a collapsed overload warning device in the press, and using the cooperation of the control circuit and the alarm device, the problem of operators being difficult to identify the damage to the fuse block is solved, preventing misoperation and extending the equipment life.
Patent Information
- Application Number
- CN202420233221.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When the fuse block is damaged in existing presses, it is difficult for operators to identify it, resulting in misoperation, which will damage the ball pad and slide block, reducing the service life of the press.
A press collapse overload warning device is designed, including connecting rods, sliders, collapse safety devices, alarm devices and control circuits. The stroke switch is controlled through the position of the pin, and acoustic or light alarm is emitted, and the control circuit is cut off to prevent further operation of the press.
It effectively prevents press failures caused by misoperation, extends the service life of the equipment, and improves the operator's sense of security.
Smart Images
Figure CN222431705U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a collapse-type overload warning device for a press machine. Background Art
[0002] The collapse type safety device is an old-fashioned overload protection device for presses with a wide range of applications. When the press is overloaded, the safety block is collapsed, which increases the gap between the ball pad and the safety block, releasing the pressure to protect the press. However, for general operators, when the gap of the press becomes larger, they will not realize that the press safety block is damaged, and will adjust the screw to reduce the gap and continue to operate the press. Over time, the ball pad will be deformed and cannot be removed, which will damage the slide, increase the gap of the press, reduce the accuracy, and reduce the service life of the press. Utility Model Content
[0003] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a press collapse type overload warning device.
[0004] A collapse-type overload warning device for a press machine comprises a connecting rod, a slider, a collapse-type fuse, an alarm device, and a control circuit. The control circuit is used to control the operation of the alarm device. The control circuit comprises a first branch, a second branch, and a third branch connected in parallel. A travel switch and a time relay are provided in the first branch. A second switch and an intermediate relay are provided in the second branch. A third switch and an alarm are provided in the third branch. The time relay is used to control the opening and closing of the second switch. The intermediate relay is used to control its own normally open contact and normally closed contact. The closing of the normally open contact is used to control the operation of the alarm. The opening of the normally closed contact is used to control the press machine to stop working. The travel switch is installed on the outside of the slider. A push rod is provided below the travel switch. The push rod is connected to the connecting rod. The travel switch is installed on the outside of the slider. A push rod is provided below the travel switch. The push rod is connected to the connecting rod.
[0005] Working principle: The opening and closing of the travel switch is controlled by the position of the ejector rod, thereby controlling the operation of the entire control circuit, issuing an audible or visual alarm, and cutting off the control circuit to prevent further operation of the press, thereby aggravating the fault and enabling normal operation only after repair.
[0006] In order to ensure the normal adjustment of the connecting rod, the connecting rod includes a connecting rod, a ball screw and a ball pad seat. The upper end surface of the slider is provided with a blind hole, and a collapse type safety device is provided in the blind hole. The ball pad seat is located above the collapse type safety device. The upper end surface of the ball pad seat is provided with a groove matching the ball head part of the ball screw. The lower end surface of the connecting rod is provided with a threaded hole, and the threaded hole is connected to the screw part of the ball screw.
[0007] In order to ensure the collapse type fuse, the collapse type fuse includes a body, an upper end surface of the body is provided with a protruding structure, and a bottom surface of the body is provided with a concave clearance space, and the clearance space is located below the protruding structure.
[0008] In order to facilitate the installation of the collapse type fuse, a mounting hole is provided on the side of the body.
[0009] In order to play an obvious warning role, the warning device is a warning signal light or an audible alarm.
[0010] Beneficial effect: Compared with the prior art, the utility model controls the opening and closing of the travel switch by the position of the push rod. When the collapse type safety device is damaged, the connecting rod descends accordingly, the distance between the bottom of the ball pad and the bottom surface of the inner blind hole of the slider is reduced, the push rod descends, and the travel switch is actuated, thereby controlling the operation of the entire control circuit, issuing an audible or visual alarm, and cutting off the control circuit at the same time to prevent further operation of the press, thereby aggravating the fault. Normal operation can only be performed after repair. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of a press collapse type overload warning device;
[0012] Figure 2 is a schematic diagram of the control circuit;
[0013] Figure 3 It is a schematic diagram of a collapse type fuse;
[0014] Figure 4 It is a schematic diagram of a crush-type fuse in a damaged state;
[0015] In the figure, 1, connecting rod, 2, ball head screw, 3, ball cushion seat, 4, collapse type fuse, 5, push rod, 6, travel switch, 7, first branch, 8, second branch, 9, third branch, 11, time relay, 12, second switch, 13, intermediate relay, 14, third switch, 15, alarm device. DETAILED DESCRIPTION
[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0017] like Figure 1-4 As shown, connecting rod 1, ball screw 2, ball cushion seat 3, collapse type fuse 4, push rod 5, travel switch 6, first branch 7, second branch 8, third branch 9, time relay 11, second switch 12, intermediate relay 13, third switch 14, alarm device 15;
[0018] A press collapse overload warning device, comprising a connecting rod, a slider, a collapse fuse 4, an alarm device 15, and a control circuit, wherein the control circuit is used to control the alarm device 15 to work, and the alarm device 15 is an alarm signal light or a sound alarm;
[0019] The control circuit includes a first branch 7, a second branch 8, and a third branch 9 connected in parallel. The first branch 7 is provided with a travel switch 6 and a time relay 11. The second branch 8 is provided with a second switch 12 and an intermediate relay 13. The third branch 9 is provided with a third switch 14 and an alarm. The time relay 11 is used to control the opening and closing of the second switch. The intermediate relay 13 is used to control its own normally open contact (i.e., the third switch) and normally closed contact. The closing of the normally open contact is used to control the alarm to work, and the opening of the normally closed contact is used to control the press to stop working. The travel switch is installed on the outside of the slider. A push rod is provided below the travel switch, and the push rod is connected to the connecting rod.
[0020] Specifically, the two contacts of the intermediate relay - the normally open contact (i.e. the third switch) and the normally closed contact, of which the normally closed contact is not connected to the alarm circuit, but to the control circuit of the machine tool, and controls the press to stop working through signal output;
[0021] The travel switch 6 is closed, the time relay 11 works, and after a delay of 0.4 seconds, the second switch 12 is closed, the intermediate relay 13 works, and the third switch 14 is closed, so that the alarm device 15 sounds an alarm.
[0022] The travel switch 6 is installed on the outside of the slider, and a push rod 5 is provided below the travel switch 6, and the push rod 5 is connected to the connecting rod.
[0023] In this embodiment, the connecting rod includes a connecting rod 1, a ball screw 2, and a ball cushion seat 3. The upper end surface of the slider is provided with a blind hole, and a collapse type safety device 4 is provided in the blind hole. The ball cushion seat 3 is located above the collapse type safety device 4. The upper end surface of the ball cushion seat 3 is provided with a groove matching the ball head part of the ball screw 2. The lower end surface of the connecting rod 1 is provided with a threaded hole, and the threaded hole is connected to the screw part of the ball screw 2.
[0024] In this embodiment, the crush-type fuse 4 includes a main body, a protruding structure is provided on the upper end surface of the main body, a recessed clearance space is provided on the bottom surface of the main body, the clearance space is located below the protruding structure, and a mounting hole is provided on the side of the main body.
[0025] Specific process: when not overloaded, the push rod 5 is under the travel switch 6, the travel switch 6 is in the open state, the time relay does not work, so the second switch 12 is in the open state, and the intermediate relay coil is not connected, and the stop signal cannot be output. The normally closed contact of the intermediate relay is closed, and the normally open contact is opened, that is, the third switch in the circuit diagram is in the open state. At this time, the first branch 7, the second branch 8, and the third branch 9 are all in the disconnected state, the control circuit of the machine tool is in the connected state, and the press works normally;
[0026] When overloaded, the collapse fuse 4 is damaged, and the push rod 5 drops accordingly, causing the push rod 5 to disengage from the travel switch 6. The travel switch 6 is closed, and the time relay 11 works. After a delay of 0.4 seconds, the second switch 12 is closed, and the intermediate relay 13 works, so that the third switch 14 is connected to the third branch 9. At this time, the alarm device 15 works and sends a signal to the control circuit of the machine tool, causing the normally closed contact to be disconnected, so that the machine tool cannot operate normally.
[0027] The time relay 11 is adjusted to about 0.4 seconds. When it works, it prevents the press from malfunctioning due to large vibration during stamping. That is, the travel switch 6 resets within 0.4S, and the circuit defaults to malfunctioning, and the machine tool can still work normally.
[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A press collapse overload warning device, characterized in that: It includes a connecting rod, a slider, a collapse type fuse, an alarm device, and a control circuit. The control circuit is used to control the operation of the alarm device. The control circuit includes a first branch, a second branch, and a third branch connected in parallel. The first branch is provided with a travel switch and a time relay. The second branch is provided with a second switch and an intermediate relay. The third branch is provided with a normally closed contact of the intermediate relay and an alarm. The time relay is used to control the opening and closing of the second switch. The intermediate relay is used to control its own normally open contact and normally closed contact. The closing of the normally open contact is used to control the operation of the alarm, and the opening of the normally closed contact is used to control the press to stop working. The travel switch is installed on the outside of the slider, and a push rod is provided under the travel switch, and the push rod is connected to the connecting rod.
2. A press collapse overload warning device according to claim 1, characterized in that: The connecting rod includes a connecting rod, a ball screw and a ball cushion seat. The upper end surface of the sliding block is provided with a blind hole, and a collapse type safety device is provided in the blind hole. The ball cushion seat is located above the collapse type safety device. The upper end surface of the ball cushion seat is provided with a groove matching the ball head part of the ball screw. The lower end surface of the connecting rod is provided with a threaded hole, and the threaded hole is connected to the screw part of the ball screw.
3. A press collapse overload warning device according to claim 1, characterized in that: The collapse type fuse comprises a body, the upper end surface of the body is provided with a protruding structure, the bottom surface of the body is provided with a concave clearance space, and the clearance space is located below the protruding structure.
4. A press collapse overload warning device according to claim 3, characterized in that: A mounting hole is arranged on the side of the body.
5. A press collapse overload warning device according to claim 1, characterized in that: The alarm device is an alarm signal light or an audible alarm.