CN211279931U

CN211279931U - Pressing speed control system of press

Info

Publication number: CN211279931U
Application number: CN201921516575.3U
Authority: CN
Inventors: 何国安; 古伟荣; 李振艺
Original assignee: Heyuan Puyi Cemented Carbide Plant Co ltd
Current assignee: Heyuan Puyi Cemented Carbide Plant Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-08-18
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a press machine pressing speed control system, including the converter, still include PLC controller and proximity switch, be provided with two connecting plates in the frame of press machine, be provided with the guide bar on two connecting plates, the guide bar is vertical to be set up, be connected with the connecting rod on the guide bar, the connecting rod level sets up, the connecting rod can reciprocate along the guide bar, the fixed mounting panel that is provided with of one end that the guide bar was kept away from to the connecting rod, proximity switch installs on the mounting panel, proximity switch is used for detecting the depression bar of press machine; the proximity switch is electrically connected with the PLC, the proximity switch transmits a detected signal to the PLC, the PLC is provided with an analog quantity control module, and the PLC is electrically connected with the frequency converter through the analog quantity control module; the utility model discloses can control the speed of press depression bar in the decline stage for can descend fast, can reduce speed before contacting the pressed object again.

Description

Pressing speed control system of press

Technical Field

The utility model relates to a press control technical field specifically is a press suppression speed control system.

Background

The press is generally divided into two stages during operation, namely a descending stage when the press is not in contact with a pressed object and a pressing stage when the press is pressed to the pressed object. If the running speed of the press rod or the press plate of the press machine is high in the descending stage, the press rod or the press plate can be in contact with the pressed object at the moment and can be in strong collision, strong oscillation can be caused on the pressed object, and even serious damage can be caused on the pressed object; if the operation speed of the press ram or the press plate is slow in the descending stage, although the damage to the pressed object is small at the moment when the press ram or the press plate contacts with the pressed object, the operation efficiency of the press machine is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a press suppression speed control system can control press depression bar or clamp plate at the speed of decline stage for can descend fast, can contact the reduction rate before being pressed the object again.

The utility model discloses a realize like this: a press speed control system of a press machine comprises a frequency converter, wherein the frequency converter is electrically connected with a driving motor for driving a press rod to move by the press machine, and the press speed control system further comprises a PLC (programmable logic controller) and a proximity switch; the proximity switch is electrically connected with the PLC, the proximity switch transmits a detected signal to the PLC, the PLC is provided with an analog quantity control module, and the PLC is electrically connected with the frequency converter through the analog quantity control module.

Further, the connecting rod is telescopic rod structure, including interior pole and outer pole, the one end of outer pole links to each other with the guide bar, be provided with the shrinkage pool on the terminal surface of the outer pole other end, and be provided with the screw thread through-hole that accesss to the shrinkage pool on the lateral wall of this end, and install adjusting bolt on this screw thread through-hole, during the shrinkage pool that sets up on inserting the outer pole of the one end of interior pole, the mounting panel is fixed to be set up in the one end that the guide bar was kept away from to interior pole.

Furthermore, the guide rod is sleeved with one end of the outer rod connected with the guide rod, the guide rod is further sleeved with two sleeves, the two sleeves are respectively positioned on the upper side and the lower side of the outer rod, threaded through holes are formed in the pipe walls of the sleeves, and fixing bolts are installed on the threaded through holes.

Further, the guide rod is of a cylindrical rod structure.

Further, the PLC controller is a Siemens S7-200 series PLC controller, and the frequency converter is a Siemens M440 series frequency converter.

Furthermore, the proximity switch is a proximity switch with the model number of LJ12A 3-2-Z/BX.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses can control the speed of press depression bar in the decline stage for can descend fast, can reduce speed before contacting the pressed object again.

2. The connecting rod is telescopic rod structure, can be used to adjust the distance between proximity switch and the depression bar, and the proximity switch of the different detection distance of being convenient for uses, has improved the utility model discloses an application scope.

3. The guide rod is of a cylindrical rod structure, so that the connecting rod can rotate by taking the guide rod as a rotating shaft, and the connecting rod can be rotated to a position where the work is not influenced when the proximity switch is not needed or when the operation is influenced by the connecting rod.

4. One end of the outer rod, which is connected with the guide rod, is sleeved on the guide rod, the guide rod is also sleeved with two sleeves, the two sleeves are respectively positioned at the upper side and the lower side of the outer rod, the pipe wall of each sleeve is provided with a threaded through hole, and the threaded through hole is provided with a fixing bolt; the sleeve makes the connecting rod easy to fix on the guide rod.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a pressing speed control system of a press according to the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

fig. 3 is a structural block diagram of an electric control system of a pressing speed control system of a press machine according to the present invention.

In the figure: 1. a drive motor; 2. a proximity switch; 3. a frame; 4. a connecting plate; 5. a press worktable; 6. a guide bar; 7. a connecting rod; 701. an inner rod; 702. an outer rod; 8. mounting a plate; 9. adjusting the bolt; 10. a sleeve; 11. and (5) fixing the bolt.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, 2 and 3, in an embodiment of the present invention, a press speed control system of a press machine includes a frequency converter electrically connected to a driving motor 1 for driving a press rod to move, a PLC controller and a proximity switch 2, wherein the proximity switch 2 is a proximity switch of LJ12a3-2-Z/BX, two connecting plates 4 are disposed on a frame 3 of the press machine, the two connecting plates 4 are disposed inside the frame 3 and above a table 5 of the press machine, the two connecting plates 4 are disposed one above the other, a guide rod 6 is disposed on the two connecting plates 4, the guide rod 6 is vertically disposed, a connecting rod 7 is connected to the guide rod 6, the connecting rod 7 is horizontally disposed, the connecting rod 7 can move up and down along the guide rod 6, a mounting plate 8 is fixedly disposed at an end of the connecting rod 7 far away from the guide rod 6, the proximity switch 2 is mounted on the mounting plate 8, the proximity switch 2 is used for detecting a pressure rod of the press machine; proximity switch 2 links to each other with the PLC controller electrical property, and the PLC controller chooses for use Siemens S7-200 series PLC controller, and proximity switch 2 gives the PLC controller with the signal transfer that detects, and the PLC controller is provided with analog quantity control module, and the PLC controller passes through analog quantity control module and links to each other with the converter electrical property, and Siemens M440 series' S converter is chooseed for use to the converter.

The utility model discloses a use method and theory of operation: placing a piece to be pressed on a press machine workbench 5, moving a connecting rod 7 up and down according to the height of the piece to be pressed, driving a mounting plate 8 to move up and down by the connecting rod 7, and adjusting the heights of the connecting rod 7 and the mounting plate 8 so that the detection position of a proximity switch 2 mounted on the mounting plate 8 is slightly higher than the height position of the upper end of the piece to be pressed; after the press machine is started, the driving motor 1 drives the press rod to press downwards at a higher speed, when the press rod descends to a position detected by the proximity switch 2, the proximity switch 2 transmits a signal of the detected press rod to the PLC controller, the PLC controller is electrically connected with the frequency converter through the analog quantity control module, the PLC controller transmits 0-10V voltage to the analog quantity control terminal of the frequency converter, the frequency of 0-50HZ output by the frequency converter corresponds to the zero rotating speed-the maximum rotating speed of the driving motor 1, the PLC controller can be provided with a current value which is transmitted to the analog quantity control terminal of the frequency converter after receiving the signal transmitted by the proximity switch 2 according to actual use requirements, for example, the current value is set to be 2V, when the press rod descends to a position detected by the proximity switch 2, a detection signal of the proximity switch 2 is transmitted to the PLC controller, the PLC controller controls the driving motor 1 to rotate at the maximum rotating speed of one fifth, so that the speed of the pressing rod pressing the piece to be pressed can be effectively reduced, and the damage to the piece to be pressed is reduced; and before the compression bar descends to the position which can be detected by the proximity switch 2, the compression bar keeps the original speed unchanged, and the problem of low working efficiency of the press machine cannot be caused.

Therefore, the utility model discloses can control the speed of press depression bar in the decline stage for can descend fast, can reduce speed before contacting the pressed object again.

Referring to fig. 2, in the embodiment of the present invention, the connecting rod 7 is a telescopic rod structure, and includes an inner rod 701 and an outer rod 702, one end of the outer rod 702 is connected to the guiding rod 6, a concave hole is provided on an end surface of the other end of the outer rod 702, a threaded through hole leading to the concave hole is provided on a side wall of the end, an adjusting bolt 9 is installed on the threaded through hole, one end of the inner rod 701 is inserted into the concave hole provided on the outer rod 702, and the mounting plate 8 is fixedly disposed at one end of the inner rod 701 away from the guiding rod 6; the connecting rod 7 is a telescopic rod structure and can be used for adjusting the distance between the proximity switch 2 and the pressure rod, so that the proximity switches 2 with different detection distances can be conveniently used, and the application range of the utility model is improved; when the length of the connecting rod 7 is adjusted, the adjusting bolt 9 is firstly screwed, then the position of the inner rod 701 in the outer rod 702 is adjusted, and the adjusting bolt 9 is screwed after the adjustment is completed.

Referring to fig. 2, in the embodiment of the present invention, an end of the outer rod 702 connected to the guide rod 6 is sleeved on the guide rod 6, two sleeves 10 are further sleeved on the guide rod 6, the two sleeves 10 are respectively located at upper and lower sides of the outer rod 702, a threaded through hole is arranged on a wall of each sleeve 10, and a fixing bolt 11 is installed on the threaded through hole; when the height position of the connecting rod 7 is adjusted, firstly, the fixing bolt 11 on the sleeve 10 is unscrewed, then the outer rod 702 moves up and down along the guide rod 6, after the connecting rod 7 moves to a proper position, the connecting rod 7 is kept still, the sleeve 10 positioned below the outer rod 702 is moved to the lower end of the outer rod 702, the upper end of the sleeve 10 is in contact with the lower end of the outer rod 702, and then the fixing bolt 11 on the sleeve 10 is screwed; then, the sleeve 10 located above the outer rod 702 is moved to the upper end of the outer rod 702, and the fixing bolt 11 on the sleeve 10 is tightened, so that the sleeve 10 is arranged to easily fix the connecting rod 7 on the guide rod 6.

The embodiment of the utility model provides an in, guide bar 6 is cylindrical rod structure, then connecting rod 7 can use guide bar 6 to rotate as the revolving axle, when need not using proximity switch 2 or when connecting rod 7 influences the operation, can rotate connecting rod 7 to the position that can not influence work.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a press speed control system, includes the converter, the converter links to each other with driving motor (1) electrical property of press drive depression bar motion, its characterized in that still includes PLC controller and proximity switch (2), be provided with two connecting plates (4) on the frame (3) of press, two connecting plates (4) set up in the inboard of frame (3), be located the top of press workstation (5), and set up one on the other, two connecting plates (4) on be provided with guide bar (6), guide bar (6) vertical setting, be connected with connecting rod (7) on guide bar (6), connecting rod (7) horizontal setting, connecting rod (7) can reciprocate along guide bar (6), the one end that guide bar (6) were kept away from in connecting rod (7) is fixed and is provided with mounting panel (8), the proximity switch (2) is arranged on the mounting plate (8), and the proximity switch (2) is used for detecting a pressure rod of the press machine; proximity switch (2) link to each other with the PLC controller electrical property, proximity switch (2) give the PLC controller with the signal transmission who detects, the PLC controller is provided with analog quantity control module, the PLC controller passes through analog quantity control module and links to each other with the converter electrical property.

2. The press pressing speed control system of the press machine as claimed in claim 1, wherein the connecting rod (7) is a telescopic rod structure and comprises an inner rod (701) and an outer rod (702), one end of the outer rod (702) is connected with the guide rod (6), a concave hole is formed in the end face of the other end of the outer rod (702), a threaded through hole leading to the concave hole is formed in the side wall of the end, an adjusting bolt (9) is installed on the threaded through hole, one end of the inner rod (701) is inserted into the concave hole formed in the outer rod (702), and the mounting plate (8) is fixedly arranged at one end, far away from the guide rod (6), of the inner rod (701).

3. The pressing speed control system of the press machine according to claim 2, characterized in that one end of the outer rod (702) connected with the guide rod (6) is sleeved on the guide rod (6), the guide rod (6) is further sleeved with two sleeves (10), the two sleeves (10) are respectively positioned at the upper side and the lower side of the outer rod (702), the pipe wall of the sleeve (10) is provided with a threaded through hole, and the threaded through hole is provided with a fixing bolt (11).

4. Press speed control system according to claim 3, characterised in that said guide bar (6) is of cylindrical bar construction.

5. The press pressing speed control system of any one of claims 1 to 4, wherein the PLC controller is a Siemens S7-200 series PLC controller, and the frequency converter is a Siemens M440 series frequency converter.

6. Press speed control system according to claim 5, characterised in that said proximity switch (2) is selected from the group of proximity switches of type LJ12A 3-2-Z/BX.