A hydraulic machine electrical control system capable of realizing multiple use modes
By designing an electrical control system for hydraulic presses with multiple operating modes, integrating inching, automatic reciprocating, programmable cycle, and position holding functions, the system solves the problem of limited functionality in hydraulic press control circuits, achieving improved flexibility and automation while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN CITY BAILI TIANDI ELECTRIC COMPLEMENT
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-02
Smart Images
Figure CN224311326U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrical control technology, and in particular relates to an electrical control system for a hydraulic press that can realize multiple usage modes. Background Technology
[0002] In today's industrial production, hydraulic presses are key pieces of equipment, and the performance of their control circuits plays a crucial role in production efficiency. However, most hydraulic press control circuits on the market can only achieve single reciprocating operations, resulting in relatively limited functionality. Although some circuits can achieve jogging control, they still cannot meet the demands for automatic reciprocating functions in complex production processes. This limitation makes existing technology difficult to adapt to diverse production scenarios and hinders the organic integration of multiple functions such as jogging, reciprocating, cycling, and holding. Summary of the Invention
[0003] In view of the problems existing in the prior art, this utility model provides an electrical control system for a hydraulic press that can realize multiple usage modes. It integrates multiple functions and diversifies functions within a single control system, significantly improving the operational flexibility and automation level of the hydraulic press.
[0004] This utility model is implemented as follows: an electrical control system for a hydraulic press that can realize multiple usage modes includes a control circuit, which includes two control units connected in parallel between the positive and negative poles, a timing unit, a cycle unit, a limit unit, and an execution unit.
[0005] The control unit is used to receive hydraulic press action signals and transmit them to the execution unit;
[0006] The timing unit can control the hydraulic press to operate according to a set time.
[0007] The cycle unit can control the hydraulic press to cycle according to a set number of times;
[0008] The limiting unit is used to receive upper and lower limit signals and transmit them to the control unit, the counting unit and the loop unit;
[0009] The execution unit is used to drive the hydraulic press.
[0010] Furthermore, the limiting unit includes an upper limit circuit and a lower limit circuit. The upper limit circuit includes an upper limit sensor C2 and an intermediate relay KA6 connected in series, and the lower limit circuit includes a lower limit sensor C1 and an intermediate relay KA4 connected in series.
[0011] Furthermore, the control unit includes a first control loop, a second control loop, and a third control loop connected in parallel.
[0012] The first control circuit includes the normally open contact of intermediate relay KA8, the normally closed contact of rotary switch SB1, the normally open contact of intermediate relay KA6, the normally closed contact of counter BZ, the normally closed contact of intermediate relay KA4, and intermediate relay KA2 connected in series. Intermediate relay KA8 is connected in parallel across the two ends of intermediate relay KA2, and the normally open contact of intermediate relay KA2 is connected in parallel across the two ends of the normally open contact of intermediate relay KA6.
[0013] The second control circuit includes the normally closed contact of rotary switch SB2, the normally open contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA1 connected in series.
[0014] The third control circuit includes the normally closed contact of rotary switch SB2, the normally closed contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA3 connected in series.
[0015] Furthermore, the normally open contact of the intermediate relay KA8 in the first control circuit is connected in parallel with a first control branch, which includes the normally open contact of the rotary switch SB2, the normally open contact of the non-locking push button switch SB4, and the normally closed contact of the non-locking push button switch SB5 connected in series.
[0016] In the third control circuit, the positive terminal of the normally closed contact of the rotary switch SB2 and the negative terminal of the normally closed contact of the foot switch SB6 are connected in parallel to a second control branch. The second control branch includes the normally open contact of the rotary switch SB2, the normally closed contact of the non-locking push button switch SB4, and the normally open contact of the non-locking push button switch SB5, which are connected in series.
[0017] Furthermore, the timing unit includes a first timing circuit and a second timing circuit connected in parallel.
[0018] The first timing circuit includes the normally closed contact of the rotary switch SB1, the normally open contact of the intermediate relay KA4, and the time relay KT connected in series.
[0019] The second timing circuit includes a normally open contact of a time relay KT, a normally closed contact of an intermediate relay KA6, and an intermediate relay KA5 connected in series. The normally open contact of the time relay KT is connected in parallel with the normally open contact of the intermediate relay KA5.
[0020] In the third control circuit, the normally closed contact of rotary switch SB2 and the normally open contact of rotary switch SB1 are connected in parallel to the normally open contact of intermediate relay KA5.
[0021] Furthermore, the loop unit includes a first loop and a second loop connected in parallel.
[0022] The first loop includes the normally open contact of the rotary switch SB3, the normally closed contact of the counter BZ, and the counter BZ connected in series. The normally open contact of the intermediate relay KA6 is connected in parallel to the CP pin and the +12V pin of the counter BZ.
[0023] The second circulation circuit includes the normally open contact of the rotary switch SB3, the normally open contact of the intermediate relay KA7, the normally closed contact of the counter BZ, and the normally open contact of the intermediate relay KA7 connected in series. The normally open contact of the intermediate relay KA7 is connected in parallel with the normally open contact of the intermediate relay KA2.
[0024] In the first control circuit, the normally open contacts of intermediate relay KA8 are connected in parallel to the normally open contacts of intermediate relay KA7.
[0025] Furthermore, the execution unit includes a solenoid valve KW1, the normally open contacts of intermediate relays KA1 and KA2 are connected in parallel and in series with the coil A of solenoid valve KW1, and the coil A of solenoid valve KW1 is energized to control the hydraulic press to move downward; the normally open contact of intermediate relay KA3 is connected in series with the coil B of solenoid valve KW1, and the coil B of solenoid valve KW1 is energized to control the hydraulic press to move upward.
[0026] The advantages and technical effects of this utility model are as follows: By adopting the above-mentioned technical solution and through circuit layout and control logic design, multiple functions are integrated. It successfully integrates diverse functions such as jogging, automatic reciprocating, programmable cycling (supporting setting the number of cycles or running time), and position holding into a single control system, significantly improving the operational flexibility and automation level of the hydraulic press. More importantly, it utilizes common electrical components in its design, eliminating complex and expensive special components, thus greatly reducing costs. While possessing powerful functionality, it also boasts the core advantages of simple structure, low cost, independent control units, and ease of maintenance and replacement.
[0027] It reduces production and manufacturing costs, improves equipment utilization, and reduces equipment idle time. It enables a single machine to complete multiple types of operations, including single reciprocating, cyclic reciprocating (adjustable number of times), inching, and cyclic reciprocating with delayed rise (adjustable delay time). Furthermore, the various types of operations can be easily switched, solving the problem that existing technologies have limited operation and cannot meet actual production needs. Attached Figure Description
[0028] Figure 1 This is an electrical schematic diagram provided in an embodiment of the present utility model. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0030] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0031] like Figure 1 The diagram shown is an electrical schematic of the hydraulic press's electrical control system. The meanings of the electrical symbols are explained below:
[0032] Rotary switch SB1: can switch between automatic and manual modes. In automatic mode, pressing the switch once will complete one or more reciprocating movements, while in manual mode, the switch must be pressed continuously to complete the action.
[0033] The rotary switch SB2 enables switching between the foot switch SB6 and the non-locking push-button switches SB4 / SB5;
[0034] The rotary switch SB3 enables the cyclic opening and closing of the function;
[0035] When rotary switch SB2 is switched to use non-locking push button switch SB4 / SB5, and rotary switch SB1 is switched to manual mode, non-locking push button switch SB4 is a jog down button, and non-locking push button switch SB5 is a jog up button. When rotary switch SB1 is used to open automatic mode, it is the start switch.
[0036] When rotary switch SB2 is switched to use foot switch SB6 and rotary switch SB1 is switched to manual mode, the hydraulic press moves downward when foot switch SB6 is pressed and upward when it is released. When rotary switch SB1 is used to activate automatic mode, it is the start switch.
[0037] Intermediate relays KA1 / KA2 are responsible for receiving the downward signal from the hydraulic press and transmitting it to solenoid valve KW1;
[0038] Intermediate relay KA3 is responsible for receiving the upward signal from the hydraulic press and transmitting it to solenoid valve KW1;
[0039] Intermediate relay KA4 is responsible for receiving and transmitting signals from lower limit sensor C1;
[0040] Intermediate relay KA5 is responsible for receiving and transmitting signals from time relay KT;
[0041] Intermediate relay KA6 is responsible for receiving and transmitting signals from upper limit sensor C2;
[0042] Intermediate relay KA7 is responsible for ensuring the automatic mode cycle mode;
[0043] Intermediate relay KA8 is responsible for ensuring automatic mode is not in cyclic mode;
[0044] The time relay KT is responsible for the delay requirement in automatic mode.
[0045] This application provides an electrical control system for a hydraulic press that can realize multiple usage modes, including a control circuit. The control circuit includes two control units connected in parallel between the positive and negative poles, a timing unit, a cycle unit, a limit unit, and an execution unit.
[0046] The control unit is used to receive hydraulic press action signals and transmit them to the execution unit;
[0047] The timing unit can control the hydraulic press to operate according to a set time.
[0048] The cycle unit can control the hydraulic press to cycle according to a set number of times;
[0049] The limiting unit is used to receive upper and lower limit signals and transmit them to the control unit, the counting unit and the loop unit;
[0050] The execution unit is used to drive the hydraulic press.
[0051] Furthermore, the limiting unit includes an upper limit circuit and a lower limit circuit. The upper limit circuit includes an upper limit sensor C2 and an intermediate relay KA6 connected in series, and the lower limit circuit includes a lower limit sensor C1 and an intermediate relay KA4 connected in series.
[0052] Furthermore, the control unit includes a first control loop, a second control loop, and a third control loop connected in parallel.
[0053] The first control circuit includes the normally open contact of intermediate relay KA8, the normally closed contact of rotary switch SB1, the normally open contact of intermediate relay KA6, the normally closed contact of counter BZ, the normally closed contact of intermediate relay KA4, and intermediate relay KA2 connected in series. Intermediate relay KA8 is connected in parallel across the two ends of intermediate relay KA2, and the normally open contact of intermediate relay KA2 is connected in parallel across the two ends of the normally open contact of intermediate relay KA6.
[0054] The second control circuit includes the normally closed contact of rotary switch SB2, the normally open contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA1 connected in series.
[0055] The third control circuit includes the normally closed contact of rotary switch SB2, the normally closed contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA3 connected in series.
[0056] Furthermore, the normally open contact of the intermediate relay KA8 in the first control circuit is connected in parallel with a first control branch, which includes the normally open contact of the rotary switch SB2, the normally open contact of the non-locking push button switch SB4, and the normally closed contact of the non-locking push button switch SB5 connected in series.
[0057] In the third control circuit, the positive terminal of the normally closed contact of the rotary switch SB2 and the negative terminal of the normally closed contact of the foot switch SB6 are connected in parallel to a second control branch. The second control branch includes the normally open contact of the rotary switch SB2, the normally closed contact of the non-locking push button switch SB4, and the normally open contact of the non-locking push button switch SB5, which are connected in series.
[0058] Furthermore, the timing unit includes a first timing circuit and a second timing circuit connected in parallel.
[0059] The first timing circuit includes the normally closed contact of the rotary switch SB1, the normally open contact of the intermediate relay KA4, and the time relay KT connected in series.
[0060] The second timing circuit includes a normally open contact of a time relay KT, a normally closed contact of an intermediate relay KA6, and an intermediate relay KA5 connected in series. The normally open contact of the time relay KT is connected in parallel with the normally open contact of the intermediate relay KA5.
[0061] In the third control circuit, the normally closed contact of rotary switch SB2 and the normally open contact of rotary switch SB1 are connected in parallel to the normally open contact of intermediate relay KA5.
[0062] Furthermore, the loop unit includes a first loop and a second loop connected in parallel.
[0063] The first loop includes the normally open contact of the rotary switch SB3, the normally closed contact of the counter BZ, and the counter BZ connected in series. The normally open contact of the intermediate relay KA6 is connected in parallel to the CP pin and the +12V pin of the counter BZ.
[0064] The second circulation circuit includes the normally open contact of the rotary switch SB3, the normally open contact of the intermediate relay KA7, the normally closed contact of the counter BZ, and the normally open contact of the intermediate relay KA7 connected in series. The normally open contact of the intermediate relay KA7 is connected in parallel with the normally open contact of the intermediate relay KA2.
[0065] In the first control circuit, the normally open contacts of intermediate relay KA8 are connected in parallel to the normally open contacts of intermediate relay KA7.
[0066] Furthermore, the execution unit includes a solenoid valve KW1, the normally open contacts of intermediate relays KA1 and KA2 are connected in parallel and in series with the coil A of solenoid valve KW1, and the coil A of solenoid valve KW1 is energized to control the hydraulic press to move downward; the normally open contact of intermediate relay KA3 is connected in series with the coil B of solenoid valve KW1, and the coil B of solenoid valve KW1 is energized to control the hydraulic press to move upward.
[0067] In the initial state, the hydraulic press is at the upper limit position, and the normally open contact of the intermediate relay KA6 is closed. Figure 1 The rotary switch SB1 shown is in automatic mode. The usage modes achievable by this application module are as follows:
[0068] 1. When rotary switch SB1 is switched to automatic mode, rotary switch SB2 is switched to foot switch, and rotary switch SB3 is in the off state, stepping on foot switch SB6 once will cause the hydraulic machine to move automatically downward. After contacting the lower limit sensor C1, the time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic machine will move automatically upward until it contacts the upper limit sensor C2, and the action is completed.
[0069] 2. When rotary switch SB1 is switched to automatic mode, rotary switch SB2 is switched to non-locking push button switch SB4 / SB5, and rotary switch SB3 is in the off state, pressing non-locking push button switch SB4 once will cause the hydraulic machine to move downward automatically. After contacting the lower limit sensor C1, the time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic machine will move upward automatically until it contacts the upper limit sensor C2, and the action is completed.
[0070] 3. When rotary switch SB1 is switched to automatic mode, rotary switch SB2 is switched to foot switch, and rotary switch SB3 is in the open state, pressing foot switch SB6 once will cause the hydraulic press to automatically move downward. After contacting the lower limit sensor C1, the time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic press will automatically move upward until it contacts the upper limit sensor C2. At this time, counter BZ will activate once, and the hydraulic press will move downward again, repeating the cycle until the set number of counts is reached, and the operation is completed.
[0071] 4. When rotary switch SB1 is switched to automatic mode, rotary switch SB2 is switched to non-locking button switch SB4 / SB5, and rotary switch SB3 is in the open state, pressing the non-locking button SB4 once will cause the hydraulic press to automatically move downward. After contacting the lower limit sensor C1, the time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic press will automatically move upward until it contacts the upper limit sensor C2. At this time, the counter BZ will activate once, and the hydraulic press will move downward again, repeating the cycle until the set number of counts is reached, and the operation is completed.
[0072] 5. When rotary switch SB1 is switched to manual mode, rotary switch SB2 is switched to foot switch, and rotary switch SB3 is in the off state, stepping on foot switch SB6 will cause the hydraulic press to move automatically downward. After contacting the lower limit sensor C1, it will stop moving. Releasing foot switch SB6 will cause the hydraulic press to return to the starting position and stop moving after contacting the upper limit sensor C2.
[0073] 6. When rotary switch SB1 is switched to manual mode, rotary switch SB2 is switched to non-locking button switch SB4 / SB5, and rotary switch SB3 is in the off state, press and hold non-locking button switch SB4, the hydraulic press will move downward, release and hold the current position, the lowest point can be down to contact the lower limit sensor C1. Press and hold non-locking button switch SB5, the hydraulic press will move upward, release and hold the current position, the highest point can be up to contact the upper limit sensor C2.
[0074] The following are examples of practical applications of this application:
[0075] Example 1: Cutting a round hole into a hexagonal hole using a hydraulic press: When the rotary switch SB1 is switched to automatic mode, the rotary switch SB2 is switched to foot switch (or to non-locking button switch SB4 / SB5), and the rotary switch SB3 is in the off state, stepping on the foot switch SB6 once (or pressing the non-locking button switch SB4) will cause the hydraulic press to drive the hexagonal cutter to move downward automatically. After contacting the lower limit sensor C1, the time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic press will automatically move upward until it contacts the upper limit sensor C2, and the processing is completed.
[0076] Example 2: Measuring Spring Performance: When rotary switch SB1 is switched to automatic mode, rotary switch SB2 is switched to foot switch (or to non-locking button switch SB4 / SB5), and rotary switch SB3 is in the open state, stepping on foot switch SB6 once (or pressing non-locking button switch SB4) will cause the hydraulic press to automatically move downwards to press the spring to the set height (the position of lower limit sensor C1). Then, time relay KT is energized and starts timing according to the set time. After the timing ends, the hydraulic press will automatically move upwards until it contacts upper limit sensor C2. At this time, counter BZ will activate once, and the hydraulic press will move downwards again. This cycle is repeated multiple times to measure the spring performance.
[0077] Example 3: Pressing bearings using a hydraulic press: When rotary switch SB1 is switched to manual mode, rotary switch SB2 is switched to non-locking push button switch SB4 / SB5, and rotary switch SB3 is in the off state, jog SB4 to press the bearing onto the shaft.
[0078] By adopting the above technical solution and through circuit layout and control logic design, multiple functions are integrated. It successfully integrates diverse functions such as jogging, automatic reciprocating, programmable cycling (supporting setting the number of cycles or running time), and position holding into a single control system, significantly improving the operational flexibility and automation level of the hydraulic press. More importantly, it utilizes common electrical components in its design, eliminating complex and expensive special components and greatly reducing costs. While possessing powerful functionality, it also boasts the core advantages of simple structure, low cost, independent control units, and ease of maintenance and replacement.
[0079] It reduces production and manufacturing costs, improves equipment utilization, and reduces equipment idle time. It enables a single machine to complete multiple types of operations, including single reciprocating, cyclic reciprocating (adjustable number of times), inching, and cyclic reciprocating with delayed rise (adjustable delay time). Furthermore, the various types of operations can be easily switched, solving the problem that existing technologies have limited operation and cannot meet actual production needs.
[0080] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An electrical control system for a hydraulic press capable of realizing multiple usage modes, characterized in that, The control circuit includes two control units connected in parallel between the positive and negative terminals, a timing unit, a looping unit, a limit unit, and an execution unit. The control unit is used to receive hydraulic press action signals and transmit them to the execution unit; The timing unit can control the hydraulic press to operate according to a set time. The cycle unit can control the hydraulic press to cycle according to a set number of times; The limiting unit is used to receive upper and lower limit signals and transmit them to the control unit, the counting unit and the loop unit; The execution unit is used to drive the hydraulic press.
2. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 1, characterized in that, The limiting unit includes an upper limit circuit and a lower limit circuit. The upper limit circuit includes an upper limit sensor C2 and an intermediate relay KA6 connected in series. The lower limit circuit includes a lower limit sensor C1 and an intermediate relay KA4 connected in series.
3. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 1 or 2, characterized in that, The control unit includes a first control loop, a second control loop, and a third control loop connected in parallel. The first control circuit includes the normally open contact of intermediate relay KA8, the normally closed contact of rotary switch SB1, the normally open contact of intermediate relay KA6, the normally closed contact of counter BZ, the normally closed contact of intermediate relay KA4, and intermediate relay KA2 connected in series. Intermediate relay KA8 is connected in parallel across the two ends of intermediate relay KA2, and the normally open contact of intermediate relay KA2 is connected in parallel across the two ends of the normally open contact of intermediate relay KA6. The second control circuit includes the normally closed contact of rotary switch SB2, the normally open contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA1 connected in series. The third control circuit includes the normally closed contact of rotary switch SB2, the normally closed contact of foot switch SB6, the normally open contact of rotary switch SB1, the normally closed contact of intermediate relay KA4, and intermediate relay KA3 connected in series.
4. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 3, characterized in that, The normally open contact of the intermediate relay KA8 in the first control circuit is also connected in parallel with a first control branch. The first control branch includes the normally open contact of the rotary switch SB2, the normally open contact of the non-locking push button switch SB4, and the normally closed contact of the non-locking push button switch SB5, which are connected in series. In the third control circuit, the positive terminal of the normally closed contact of the rotary switch SB2 and the negative terminal of the normally closed contact of the foot switch SB6 are connected in parallel to a second control branch. The second control branch includes the normally open contact of the rotary switch SB2, the normally closed contact of the non-locking push button switch SB4, and the normally open contact of the non-locking push button switch SB5, which are connected in series.
5. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 3, characterized in that, The timing unit includes a first timing circuit and a second timing circuit connected in parallel. The first timing circuit includes the normally closed contact of the rotary switch SB1, the normally open contact of the intermediate relay KA4, and the time relay KT connected in series. The second timing circuit includes a normally open contact of a time relay KT, a normally closed contact of an intermediate relay KA6, and an intermediate relay KA5 connected in series. The normally open contact of the time relay KT is connected in parallel with the normally open contact of the intermediate relay KA5. In the third control circuit, the normally closed contact of rotary switch SB2 and the normally open contact of rotary switch SB1 are connected in parallel to the normally open contact of intermediate relay KA5.
6. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 3, characterized in that, The loop unit includes a first loop and a second loop connected in parallel. The first loop includes the normally open contact of the rotary switch SB3, the normally closed contact of the counter BZ, and the counter BZ connected in series. The normally open contact of the intermediate relay KA6 is connected in parallel to the CP pin and the +12V pin of the counter BZ. The second circulation circuit includes the normally open contact of the rotary switch SB3, the normally open contact of the intermediate relay KA7, the normally closed contact of the counter BZ, and the normally open contact of the intermediate relay KA7 connected in series. The normally open contact of the intermediate relay KA7 is connected in parallel with the normally open contact of the intermediate relay KA2. In the first control circuit, the normally open contacts of intermediate relay KA8 are connected in parallel to the normally open contacts of intermediate relay KA7.
7. The hydraulic press electrical control system capable of realizing multiple usage modes according to claim 3, characterized in that, The execution unit includes a solenoid valve KW1. The normally open contacts of intermediate relays KA1 and KA2 are connected in parallel and in series with the coil A of solenoid valve KW1. When the coil A of solenoid valve KW1 is energized, it controls the hydraulic press to move downward. The normally open contact of intermediate relay KA3 is connected in series with the coil B of solenoid valve KW1. When the coil B of solenoid valve KW1 is energized, it controls the hydraulic press to move upward.