Device and system for detecting movement of hydraulic cushion

Abstract

The utility model relates to the technical field of hydraulic machines, in particular to a device and a system for detecting movement of a hydraulic cushion. Comprising a lower cross beam, an upper cross beam, a sliding block, a lower cylinder, a hydraulic cushion assembly body, a working table plate and ejector rods, the lower cylinder is fixedly arranged at the center of the bottom of the lower cross beam, the working table plate is arranged at the top of the upper cross beam, and the hydraulic cushion assembly body is arranged in the lower cross beam and provided with a plurality of ejector rods; a plurality of top holes are formed in the working table in a penetrating mode, the top holes correspond to the top rods in a one-to-one mode, long holes are formed in the side wall of the lower cross beam in a penetrating mode, and strip-shaped visual sensors are installed on the outer sides of the long holes. The device system for detecting the movement of the hydraulic cushion comprises a comparator, a controller and an actuator. In this way, the requirements for the installation space are small, the hydraulic cushion can be detected more accurately compared with common control, and therefore the displacement and speed of the lower cylinder can be detected and controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic presses, in particular to a device and a system for detecting the movement of a hydraulic pad. Background Art

[0002] At present, for hydraulic presses with simple structures and hydraulic pads, it is often necessary to detect the displacement of the hydraulic pad to determine whether the stroke of the cylinder meets the set value. Commonly used hydraulic pad displacement detection methods mainly include displacement sensor detection, proximity switch detection and time control detection. However, the displacement sensor has high requirements for environmental conditions and is sensitive to factors such as temperature and humidity. For hydraulic press equipment with hydraulic pads that have a mobile workbench and other complex structures and require digging the foundation, although the above three methods can be used, in many cases, for the equipment required to use these methods, the narrow space has become the main factor limiting their installation and use. Therefore, the utility model proposes a device system for detecting the movement of the hydraulic pad. It can achieve the purpose of detecting the displacement and speed of the lower cylinder with a small requirement for installation space and more accurate detection of the hydraulic pad than ordinary control. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and proposes a device and a system for detecting the movement of a hydraulic pad.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for detecting the movement of a hydraulic pad comprises a lower crossbeam, an upper crossbeam, a sliding block, a lower cylinder, a hydraulic pad assembly, a work table and a push rod, wherein a lower cylinder is fixedly arranged at the bottom center of the lower crossbeam, and a work table is arranged on the top of the upper crossbeam, and the device is characterized in that: the interior of the lower crossbeam is a square hollow structure, a hydraulic pad assembly is arranged above the movable end of the lower cylinder, and a plurality of push rods are arranged on the hydraulic pad assembly; the push rods are extended upward to the upper surface of the work table, and the work table is penetrated by a plurality of push holes, and the top holes correspond to the push rods one by one and are slidably connected, and an elongated hole is penetrated through the side wall of the lower crossbeam, and a detection device is installed on the outer side of the elongated hole.

[0006] Furthermore, the detection device comprises a visual sensor installation groove and a strip-shaped visual sensor. The visual sensor installation groove is a groove penetrating from top to bottom, and the strip-shaped visual sensor is installed in the groove.

[0007] Furthermore, the hydraulic pad assembly includes a hydraulic pad and a wear-resistant plate.

[0008] Furthermore, guide blocks are respectively arranged around the hydraulic cushion.

[0009] Furthermore, the surrounding walls of the lower cross beam are respectively provided with guide plates corresponding to the guide blocks.

[0010] Furthermore, the strip-shaped visual sensor is electrically connected to the electrical cabinet.

[0011] Furthermore, a detection system includes a comparator, a controller, and an actuator, and the comparator, the controller, the actuator, and the strip vision sensor are all electrically connected to the electrical cabinet.

[0012] Compared with the existing technology, the device and system for detecting the movement of the hydraulic pad provided by the utility model have the following advantages:

[0013] 1. Easy to install and disassemble;

[0014] 2. The action logic is more reasonable, saving time and personnel costs;

[0015] 3. The position is fixed, the space requirement is smaller, and it is more precise than ordinary control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic three-dimensional diagram of the structure of a device for detecting the movement of a hydraulic pad according to the utility model;

[0017] Figure 2 This is a cross-sectional view of a device for detecting the movement of a hydraulic pad according to the utility model;

[0018] Figure 3 This is a schematic diagram of a combination of a visual sensor installation slot and a strip-shaped visual sensor for a device for detecting the movement of a hydraulic pad according to the utility model;

[0019] Figure 4 This is a system diagram of a device and system for detecting the movement of a hydraulic pad according to the utility model;

[0020] In the figure: 1. lower cross beam, 2. lower cylinder, 3. hydraulic pad, 4. wear-resistant plate, 5. work table, 6. push rod, 7. top hole, 8. visual sensor mounting slot, 9. strip visual sensor, 10. guide block, 11. guide plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Example 1, please refer to Figure 1 , Figure 2 , a device for detecting the movement of a hydraulic pad, comprising a lower crossbeam 1, an upper crossbeam, a slider, an electrical cabinet, a lower cylinder 2, a hydraulic pad assembly, a working table 5 and a push rod 6. The interior of the lower crossbeam 1 is a square hollow structure. The lower cylinder 2 is fixedly arranged at the center of the bottom of the lower crossbeam 1. The lower cylinder 2 is fixed to the bottom of the lower crossbeam 1 through a flange. A working table 5 is arranged on the top of the lower crossbeam 1, and the working table 5 is fixed to the top of the lower crossbeam 1 through bolts. A hydraulic pad assembly is arranged above the movable end of the lower cylinder 2, and several push rods 6 are arranged on the hydraulic pad assembly; the push rod 6 extends upward to the upper surface of the working table 5, specifically sinking 2-5 mm below the upper surface of the working table 5, and the working table 5 is penetrated by several top holes 7, which correspond to the push rods 6 one by one and are slidably connected, and the side wall of the lower crossbeam 1 is penetrated by an elongated hole, and the elongated hole is away from the inner wall of the lower crossbeam and a detection device is installed.

[0024] The hydraulic pad assembly is lifted by the movable end of the lower cylinder 2 installed at the bottom of the lower cross beam 1, so that the push rod 6 rises, and the push rod 6 extends from the top hole 7 to lift the mold. When it is stationary, the push rod 6 is slightly lower than the top hole 7 in the work table 5. The top holes can be arranged in a ring or square. The number of push rods 6 and top holes can be selected according to needs. The top holes play a guiding role for the push rods.

[0025] Example 2, please continue to refer to Figure 1 The hydraulic pad assembly includes a hydraulic pad 3 and a wear-resistant plate 4. In order to make the hydraulic pad assembly slide better in the lower beam, guide blocks 10 are respectively arranged around the hydraulic pad 3. The guide blocks 10 are slidably arranged on the guide plates 11, and the guide plates 11 are respectively arranged on the four walls of the lower beam.

[0026] The material of hydraulic pads can be cast iron, steel, aluminum alloy, etc., among which cast iron hydraulic pads are the most common. Cast iron hydraulic pads have the characteristics of high strength, pressure resistance and impact resistance, and can withstand the pressure and impact of heavy objects.

[0027] The hydraulic pad mainly plays a buffering role. In order to make the hydraulic pad more wear-resistant and corrosion-resistant, and to prevent the push rod from causing damage to the hydraulic pad and avoid the formation of some pits and holes, a wear-resistant plate 4 can be fixed on the hydraulic pad 3 by bolts, and the push rod 6 is set on the wear-resistant plate 4. The wear-resistant plate 4 can be one or more pieces. In this embodiment, it is set to 4 pieces, which are evenly laid on the hydraulic pad.

[0028] Example 3, please refer to Figure 3 In order to detect the displacement stroke of the lower cylinder, since the lower cylinder is arranged at the bottom of the lower cross beam and is difficult to observe, a through long hole is arranged in the side wall of the lower cross beam, which is a waist-shaped hole in this embodiment, and a detection device is installed on the outer side of the waist-shaped hole away from the inner wall of the lower cross beam.

[0029] The detection device includes a visual sensor installation groove 8 and a strip visual sensor 9. The visual sensor installation groove 8 is a groove that runs through from top to bottom, and the strip visual sensor 9 is installed in the groove. The length of the strip visual sensor 9 and the visual sensor installation groove 8 must be greater than or equal to the maximum stroke of the lower cylinder, so as to detect the full stroke displacement of the hydraulic pad, and also the displacement stroke of the lower cylinder. Similarly, the length of the waist-shaped hole changes with the length of the visual sensor installation groove 8.

[0030] The visual sensor mounting groove 8 is installed on the outside of the waist-shaped hole by bolts, and the strip-shaped visual sensor 9 is installed in the visual sensor mounting groove 8. The installation and disassembly are convenient. The strip-shaped visual sensor 9 installed in the waist-shaped hole can capture the displacement stroke of the hydraulic pad. The outer surface of the visual sensor mounting groove 8 can cover the strip-shaped visual sensor 9, blocking external dust from entering the interior, protecting the strip-shaped visual sensor 9 from being contaminated by dust, etc., and also protecting the cleanliness of the interior of the lower beam.

[0031] In order to make the hydraulic pad detection and adjustment to a more precise range, please refer to Figure 4 A detection system for detecting the movement of the hydraulic pad is set in the electrical cabinet of the hydraulic press. The system for detecting the movement of the hydraulic pad is a closed-loop control system, including a comparator, a controller, and an actuator. The comparator, controller, actuator, and strip vision sensor 9 are all electrically connected to the electrical system of the hydraulic press.

[0032] The principle of vision sensors is to capture thousands of pixels of light from a whole image. The clarity and detail of an image is usually measured by resolution, which is expressed in the number of pixels. After capturing the image, the vision sensor compares it with the reference image stored in the memory to make an analysis.

[0033] The strip vision sensor 9 is electrically connected to the system in the electrical cabinet of the hydraulic press. The displacement of the hydraulic pad is recorded at any time through the strip vision sensor 9 and fed back to the electrical control system in the electrical cabinet. The electrical operation panel displays the displacement of the hydraulic pad in real time. The strip vision sensor 9 adopts closed-loop feedback control to ensure that the actual displacement of the hydraulic pad is consistent with the expected displacement within the required accuracy range, thereby ensuring that the displacement and speed of the lower cylinder are within the set range.

[0034] The working principle of the utility model is as follows: first fix the upper and lower molds, put the product to be pressed in, the lower cylinder pushes the hydraulic pad assembly upward to move upward, the ejector rod is ejected out of the ejection hole, and stops running at a certain position, the main cylinder drives the slider to move downward, and when it contacts the product, as the main cylinder continues to exert force, the ejector rod will move downward for a distance, and then the main cylinder and the lower cylinder remain stationary. After the product is formed, the main cylinder retreats, and the movable end of the lower cylinder pushes upward, which will drive the hydraulic pad assembly to move upward and drive the ejector rod to eject the product.

[0035] In this process, the strip vision sensor 9 always monitors the stroke of the hydraulic pad assembly. The sensor projects a light image to the target, receives a return signal, measures the distance, and feeds back to the electrical control system in real time. Since the strip vision sensor 9 is controlled by a closed-loop control system, the closed-loop control system includes a comparator, a controller, and an actuator. If the displacement distance of the hydraulic pad assembly collected by the strip vision sensor deviates from the set value, the deviation is calculated by the comparator and fed back to the controller. The controller outputs the actuator and the actuator continuously adjusts the speed and displacement of the lower cylinder to eliminate the deviation to the displacement value set by the hydraulic system.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the movement of a hydraulic pad, comprising a lower crossbeam (1), an upper crossbeam, a slider, a lower cylinder (2), a hydraulic pad assembly, a workbench (5) and a push rod (6), wherein the lower crossbeam (1) is fixedly provided with a lower cylinder (2) at the bottom center thereof, a workbench (5) is provided at the top of the lower crossbeam (1), the interior of the lower crossbeam (1) is a square hollow structure, a hydraulic pad assembly is provided above the movable end of the lower cylinder (2), and a plurality of push rods (6) are provided on the hydraulic pad assembly; the push rods (6) extend upward to the upper surface of the workbench, the workbench (5) is penetrated with a plurality of push holes (7), the push holes (7) correspond to the push rods (6) one by one and are slidably connected, and characterized in that: A long hole is formed through the side wall of the lower cross beam (1), and a detection device is installed on the outer side of the long hole away from the inner wall of the lower cross beam.

2. The device for detecting the movement of a hydraulic cushion according to claim 1, characterized in that: The detection device comprises a visual sensor installation groove (8) and a strip-shaped visual sensor (9); the visual sensor installation groove (8) is a groove penetrating from top to bottom, and the strip-shaped visual sensor (9) is installed in the groove.

3. The device for detecting the movement of a hydraulic cushion according to claim 1, characterized in that: The hydraulic pad assembly comprises a hydraulic pad (3) and a wear-resistant plate (4), wherein the wear-resistant plate (4) is arranged on the hydraulic pad (3).

4. A device for detecting the movement of a hydraulic cushion according to claim 3, characterized in that: The hydraulic cushion (3) is provided with guide blocks (10) on all four sides.

5. A device for detecting the movement of a hydraulic cushion according to claim 4, characterized in that: The guide block (10) is slidably arranged on the guide plate (11), and the guide plates (11) are respectively arranged on the surrounding walls of the lower cross beam.

6. A detection system, comprising a device for detecting the movement of a hydraulic pad as claimed in any one of claims 1 to 5, characterized in that: The detection system is a closed-loop control system, comprising a comparator, a controller, and an actuator. The comparator, the controller, the actuator, and the strip-shaped visual sensor (9) are all electrically connected to the electrical system of the hydraulic press.

Images