A press oil circuit control system

Abstract

The present invention relates to the technical field of press equipment, and specifically to a press oil circuit control system, including a power element, an actuator, a control element, an auxiliary element and an energy medium, and also includes a shell, on which the power element, the actuator, the control element, the auxiliary element and the energy medium are all arranged; the power element includes an external driving member and a receiving member, and the driving member drives the receiving member to move relative to the shell, thereby driving the energy medium to transfer energy in the shell, and the power element presents a three-stage driving mode, which ensures that the energy medium transfers energy in the shell and effectively avoids flow loss, thereby improving the accuracy of oil circuit control. By setting up a three-stage driving mode, the problem of flow loss can be effectively avoided during the driving process of the power element, so that the press can be better applied to the production of high-precision compression molded products.

Description

Technical Field

[0001] The invention relates to the technical field of press equipment, and in particular to a press oil circuit control system. Background Art

[0002] Press is the abbreviation of press, hydraulic press and oil press. Press refers to a molding machine used for industrial products to be molded by pressure. It generally uses hydraulic cylinders, so it is also called oil press. The action of the press is mostly controlled by a hydraulic system. The hydraulic system consists of five parts: power element, actuator, control element, auxiliary element (accessory) and hydraulic oil. Hydraulic oil is the working medium used to transfer energy in the entire oil circuit control system.

[0003] In actual use, the oil circuit system will inevitably have the problem of flow loss. The so-called flow loss means that in the hydraulic system, each pressed component has a surface that moves relative to each other, such as the inner surface of the hydraulic cylinder and the outer surface of the piston. Because of the relative movement, there is a certain gap between them. If the two sides of the gap are high-pressure oil and low-pressure oil respectively, the high-pressure oil will flow through the gap to the low-pressure area, causing leakage. The actual flow caused by this leakage is reduced, which in turn affects the actual control accuracy. For this problem, the existing solution is usually to expand a certain rated flow. Basically, the most commonly used method is to estimate the maximum flow required for the system to work by multiplying a coefficient of 1.1-1.3.

[0004] As mentioned above, although the flow loss can be compensated by increasing the rated flow, when the press is used for the production of high-precision compression molded products, this uncertain coefficient needs to be debugged multiple times, and even if the rated flow is fixed, the actual flow loss is always uncertain each time the actuator strokes, which leads to the inability to guarantee the quality of the product.

[0005] So to address this problem, we need to start from the root and design the locations where hydraulic oil leakage may occur to avoid hydraulic oil leakage, thereby ensuring the control accuracy so that the press can be better used in the production of high-precision compression molded products. Summary of the invention

[0006] Technical issues solved

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a press oil circuit control system, which can effectively solve the problem of compensating for flow loss by increasing the rated flow in the prior art. However, when the press is used for the production of high-precision compression molded products, this uncertain coefficient needs to be debugged multiple times, and even if the rated flow is guaranteed to be fixed, there is always uncertainty in the actual flow loss each time the actuator strokes, which leads to the problem that the product quality cannot be guaranteed.

[0008] Technical Solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] The present invention provides a compressor oil circuit control system, comprising a power element, an actuator, a control element, an auxiliary element and an energy medium, and also comprising a shell, on which the power element, the actuator, the control element, the auxiliary element and the energy medium are all arranged; the power element comprises an external driving member and a receiving member, and the driving member drives the receiving member to move relative to the shell, thereby driving the energy medium to transfer energy in the shell, and the power element presents a three-level driving mode, which ensures that the energy medium transfers energy in the shell and effectively avoids flow loss, thereby improving the accuracy of oil circuit control.

[0011] Furthermore, a first channel, a second channel and a third channel are opened on the shell, and a separation membrane is also provided inside the shell, and energy medium is filled in the first channel, the second channel and the third channel; the second channel and the third channel are located on the same side of the separation membrane and are separated from the first channel, and the power element is movably connected inside the first channel.

[0012] Furthermore, movable surfaces with different calibers are respectively opened inside the first channel along the moving direction of the power element, including a first movable surface, a second movable surface and a third movable surface; the first movable surface and the second movable surface are connected by a first end surface, and the second movable surface and the third movable surface are connected by a second end surface.

[0013] Furthermore, the power element includes a first socket member, a second socket member and a third socket member. The three socket members are all installed on the output ends of the corresponding driving members. Driven by the corresponding driving members, the three can produce displacements without interfering with each other; the second socket member is movably connected to the inside of the first socket member, and the third socket member is movably connected to the inside of the second socket member; the first inclined surface opened at the lower end of the first socket member overlaps with the first end face, and the second inclined surface opened at the lower end of the second socket member overlaps with the second end face.

[0014] Furthermore, a sealed cavity a is formed between the middle parts of the first receiving part and the second receiving part, and a sealed cavity b is formed between the middle parts of the second receiving part and the third receiving part. Capsules are bonded to the outer walls of the first receiving part and the second receiving part. The two capsules located on the outer walls of the first receiving part and the second receiving part are respectively connected to the sealed cavity a and the sealed cavity b, and the capsules are filled with gas.

[0015] Furthermore, a first avoidance channel is opened in the middle of the first receiving member, a first placement cavity is opened at the lower end of the first avoidance channel, and the second receiving member is movably connected in the first placement cavity.

[0016] Furthermore, a second avoidance channel is opened in the middle of the second receiving member, and a second placement cavity is opened at the lower end of the second avoidance channel.

[0017] Beneficial Effects

[0018] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention can effectively avoid the problem of flow loss during the driving process of the power element by setting up a three-stage driving mode, so that the press can be better applied to the production of high-precision compression molded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the overall cross-section of the oil circuit system of the present invention, in which the power element is inside the housing;

[0022] Figure 2 It is a cross-sectional schematic diagram of the housing of the present invention being located at a power element;

[0023] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the first receiving member of the present invention;

[0024] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the second receiving member of the present invention;

[0025] Figure 5 is a schematic diagram of the overall cross-sectional structure of the third receiving member of the present invention;

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure when the position of the first receiving member in the power element of the present invention changes;

[0027] Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0028] Figure 8 It is a schematic cross-sectional structure diagram of the power element of the present invention when the position change of the first receiving member is completed;

[0029] Fig. 9 For the present invention Figure 8 The enlarged structural diagram at B in the middle;

[0030] Fig.10 It is a schematic cross-sectional structure diagram of the second receiving member in the power element of the present invention when the position change is completed;

[0031] Fig.11 It is a schematic cross-sectional structure diagram of the third receiving member of the present invention when the position change is completed;

[0032] Fig.12 It is a schematic diagram for comparing the cross-sectional structures of the power element of the present invention before and after operation;

[0033] Fig.13 The figure is a schematic diagram of the cross-sectional structure of the separator in the present invention.

[0034] The numbers in the figure represent:

[0035] 1. Shell; 101. First movable surface; 102. First end surface; 103. Second movable surface; 104. Second end surface; 105. Third movable surface;

[0036] 110, first channel; 120, second channel; 130, third channel;

[0037] 2. first receiving member; 201. first inclined surface;

[0038] 210, first avoidance channel; 220, first placement cavity; 230, first activity cavity; 231, first communication cavity;

[0039] 3. second receiving member; 301. second inclined surface; 302. first overlapping member;

[0040] 310, second avoidance channel; 320, second placement cavity; 330, second activity cavity; 331, second communication cavity;

[0041] 4. The third connecting piece; 401. The second connecting piece;

[0042] 5. Cyst;

[0043] 6. Separation membrane. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The present invention will be further described below in conjunction with the embodiments.

[0046] Example: Refer to the attached Figure 1 -Attached Fig.13 As shown in, a press oil circuit control system includes a power element, an actuator, a control element, an auxiliary element and an energy medium. In the oil circuit control system, the power element arranged can transfer the energy in the prime mover to the oil circuit control system, and in this way the actuator can perform corresponding actions to achieve the action purpose of the press. It also includes a shell 1, and the power element, the actuator, the control element, the auxiliary element and the energy medium are all arranged on the shell 1.

[0047] As an implementation method, the energy medium in the oil circuit control system can be selected as hydraulic oil. Under the drive of the power element, it can be transmitted through hydraulic power, thereby causing the actuator to perform certain actions. In addition, during the actual use of the press, a mold can be installed on the actuator. For the compression molding process, the press can have a symmetrical structure, or it can be set only on one side in the upper and lower directions. Through the drive of the power element, the actuator can be driven to move, thereby driving the mold installed on the actuator to perform compression molding.

[0048] The power element includes an external driving member and a receiving member. The driving member drives the receiving member to move relative to the shell 1, thereby driving the energy medium to transfer energy in the shell 1. The power element presents a three-level driving method to ensure that the energy medium transfers energy in the shell 1 and effectively avoids flow loss, thereby improving the accuracy of oil circuit control.

[0049] Specifically, the power element includes a first receiving member 2, a second receiving member 3 and a third receiving member 4. The three receiving members are all installed on the output ends of the corresponding driving members. Driven by the corresponding driving members, the three can produce displacements without interfering with each other. Specifically, the second receiving member 3 is movably connected to the inside of the first receiving member 2, and the third receiving member 4 is movably connected to the inside of the second receiving member 3.

[0050] A sealed cavity a is formed between the middle parts of the first receiving part 2 and the second receiving part 3, and a sealed cavity b is formed between the middle parts of the second receiving part 3 and the third receiving part 4. Capsules 5 are bonded to the outer walls of the first receiving part 2 and the second receiving part 3. The two capsules 5 located on the outer walls of the first receiving part 2 and the second receiving part 3 are respectively connected to the sealed cavity a and the sealed cavity b, and the capsules 5 are filled with gas.

[0051] Specifically, the position of the shell 1 is fixed. In the power element, when the first supporting member 2 is displaced relative to the shell 1, the process is called primary drive; when the second supporting member 3 is displaced relative to the shell 1, the process is called secondary drive; when the third supporting member 4 is relatively displaced relative to the shell 1, the process is called tertiary drive.

[0052] The housing 1 is provided with a first channel 110, a second channel 120 and a third channel 130, and the power element is movably connected inside the first channel 110. The first channel 110 is provided with movable surfaces of different diameters along the moving direction of the power element, including a first movable surface 101, a second movable surface 103 and a third movable surface 105; the first movable surface 101 and the second movable surface 103 are connected through a first end surface 102, and the second movable surface 103 and the third movable surface 105 are connected through a second end surface 104. A separation membrane 6 is also provided inside the housing 1, and energy medium is filled in the first channel 110, the second channel 120 and the third channel 130; the second channel 120 and the third channel 130 are located on the same side of the separation membrane 6 and are separated from the first channel 110.

[0053] The above, combined with the attached Figure 3 -Attached Figure 5 As shown in , specifically, a first avoidance channel 210 is provided in the middle of the first receiving member 2, a first placement cavity 220 is provided at the lower end of the first avoidance channel 210, the second receiving member 3 is movably connected in the first placement cavity 220, a first movable cavity 230 is provided on the inner wall of the first placement cavity 220, a first lap member 302 is fixedly connected to the upper end of the second receiving member 3, the outer wall of the first lap member 302 is slidably matched with the inner wall of the first movable cavity 230, a first connecting cavity 231 is provided at the upper end of the first movable cavity 230, and the first connecting cavity 231 is connected to the inside of the capsule 5 bonded to the outer wall of the first receiving member 2, that is, the connection relationship between the sealing cavity a and the capsule 5 on the outer wall of the first receiving member 2 is ensured. During the primary driving process, the first receiving member 2 slides relative to the shell 1 under the drive of its corresponding driving member. This process is described in detail in the attached drawings. Figure 6 -Attached Fig. 9As shown in , at this time, the energy medium located at the lower side of the power element and inside the shell 1 will be compressed, and at the same time, the gas originally in the sealed cavity a can enter the interior of the corresponding capsule 5 through the first connecting cavity 231, so that during the first-stage driving process, the capsule 5 expands linearly, thereby ensuring that the outer wall of the capsule 5 can maintain a good seal with the first channel 110 opened on the shell 1, and in this process, the actual contact surface is the outer wall of the capsule 5 and the first active surface 101. When the first-stage driving is completed, refer to the attached Figure 8 As shown in , the first inclined surface 201 at the lower end of the first receiving member 2 will contact the first end surface 102 in the first channel 110 to achieve end surface sealing;

[0054] During this process, the energy medium located on one side of the first receiving member 2 will have flow loss along the gap between the first receiving member 2 and the first channel 110. In order to solve this problem, the capsule 5 is set on the outer wall of the first receiving member 2. During the first-stage driving process, the sealing between the two contact surfaces can be maintained at a certain height, thereby greatly avoiding the problem of flow loss. At the same time, at the end of the first-stage driving, the end face seal between the set first inclined surface 201 and the first end face 102 is used, so that in the subsequent driving process, this part will not have the problem of flow loss.

[0055] The above, combined with the attached Figure 3 -Attached Figure 5 As shown in , a second avoidance channel 310 is provided in the middle of the second receiving member 3, a second placement cavity 320 is provided at the lower end of the second avoidance channel 310, the third receiving member 4 is movably connected in the second placement cavity 320, a second movable cavity 330 is provided on the inner wall of the second placement cavity 320, a second lap member 401 is fixedly connected to the outer wall of the upper end of the third receiving member 4, the second lap member 401 is slidably matched with the inner wall of the second movable cavity 330, a second connecting cavity 331 is provided at the upper end of the second movable cavity 330, and the second connecting cavity 331 is connected to the inside of the capsule 5 bonded to the outer wall of the second receiving member 3, that is, the connection relationship between the sealing cavity b and the capsule 5 on the outer wall of the second receiving member 3 is ensured. During the secondary driving process, the second receiving member 3 slides relative to the shell 1 under the drive of its corresponding driving member. This process is described in detail in the attached drawing. Figure 8 -Attached Fig.10As shown in , at this time, the energy medium located at the lower side of the power element and inside the shell 1 will be compressed (in the first channel 110), and the gas originally in the sealed cavity b can enter the corresponding capsule 5 through the second connecting cavity 331, so that during the secondary drive process, the capsule 5 expands linearly, thereby ensuring that the outer wall of the capsule 5 can maintain a good seal with the first channel 110 in the shell 1, and in this process, the two surfaces actually in contact are the outer wall of the capsule 5 and the second active surface 103. When the secondary drive is completed, refer to the attached Fig.10 As shown in , the second inclined surface 301 at the lower end of the second receiving member 3 overlaps with the second end surface 104 to achieve end surface sealing. In this process, it should be explained that when the first receiving member 2 is fixed and the second receiving member 3 is displaced relative to the housing 1, the sealing cavity a reappears, thereby resetting the capsule 5 on the outer wall of the first receiving member 2, ensuring that the expansion of the capsule 5 is only a process amount, thereby ensuring the performance of the capsule 5 each time it is used;

[0056] In this process, the energy medium located at one side of the second receiving member 3 will have flow loss along the gap between the second receiving member 3 and the first channel 110. In order to solve this problem, the capsule 5 on the outer wall of the second receiving member 3 is set, and the sealing between the two contact surfaces is kept at a certain height during the secondary drive, thereby greatly avoiding the problem of flow loss. At the same time, at the end of the primary drive, the end face seal between the second inclined surface 301 and the second end face 104 is set, so that in the subsequent drive process, this part will not have the problem of flow loss. As mentioned above, the expansion of the capsule 5 is used to avoid the existence of flow loss between the two contact surfaces that actually slide in the primary drive and the secondary drive. Specifically, when the energy medium with a certain pressure wants to overcome the pressure of the gas inside the capsule 5 and flow to the other side, the pressure of the gas in the capsule 5 compressed by the energy medium will gradually increase, and will increase synchronously in direct proportion with the increase of the pressure of the energy medium. According to the principle of force balance, in this dynamic drive process, the two active surfaces can still be effectively sealed. The problem with this process is that there may be excessive pressure between the two contact surfaces, which in turn generates greater friction. This problem can be overcome by increasing the driving force of the external driving part, and the oil circuit control system is for the review of compression molding process products. In the actual production process, it does not require too much pressure. Therefore, the above method can be used to solve the problem well. As for the specific proportional relationship, it will not be elaborated in this case.

[0057] See attached Fig.10 -Attached Fig.11The change in this process is the change in structure brought about by the three-stage drive. Specifically, the first-stage drive and the second-stage drive have been described above. It should be noted that when the power element is in an attached position relative to the housing 1, Fig.10 In the state of , the squeezed energy medium has maintained a certain pressure, but through the end face seal between the first inclined surface 201 and the first end face 102, and the end face seal between the second inclined surface 301 and the second end face 104, the above-mentioned driving process, even if it remains in this state, there will be no problem of flow loss. When the third receiving member 4 is driven by an external driving member to adjust its position, the third receiving member 4 will compress the energy medium again. In this process, no corresponding capsule 5 is set to avoid flow loss. The purpose is that this part requires a large external driving force during actual use. Therefore, if the capsule 5 is still used, the capsule 5 will be damaged. In this case, the positions where flow loss may exist in the three-level drive are: the third active surface 105 and the third receiving member 4; the third receiving member 4 and The second placement cavity 320, but the contact surfaces of the two positions are in a sealed environment, and the flow rate will not be lost. The gas returns to the sealed cavity b and is restored, thereby resetting the capsule 5. The above-mentioned primary drive and secondary drive can deform the partition membrane 6 arranged in the shell 1, thereby causing corresponding changes in the second channel 120 and the third channel 130. Specifically, the second channel 120 and the third channel 130 are both movably connected with an actuator, which can be installed with a specific compression mold. The partition membrane 6 can be regarded as a part of the energy medium, and the energy medium at both sides thereof will not have the problem of flow loss, thereby ensuring the actual flow pressure acting on the actuator, thereby ensuring the precise stroke of the compression molding, and realizing high-quality production of high-precision compression molded products.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A press oil circuit control system, comprising a power element, an actuator, a control element, an auxiliary element and an energy medium, characterized in that: Also includes: A housing (1), wherein the power element, the actuator, the control element, the auxiliary element and the energy medium are all arranged on the housing (1); The power element comprises an external driving element and a receiving element, wherein the driving element drives the receiving element to move relative to the housing (1), thereby driving the energy medium to transfer energy within the housing (1), and the power element presents a three-stage driving mode, thereby ensuring that the energy medium transfers energy within the housing (1) and effectively avoiding flow loss, thereby improving the accuracy of oil circuit control; A first channel (110), a second channel (120) and a third channel (130) are provided on the upper portion of the shell (1); a separation membrane (6) is also provided inside the shell (1); and energy medium is filled in the first channel (110), the second channel (120) and the third channel (130); The second channel (120) and the third channel (130) are located on the same side of the separation membrane (6) and are separated from the first channel (110), and the power element is movably connected inside the first channel (110); The first channel (110) is provided with movable surfaces of different diameters along the moving direction of the power element, including a first movable surface (101), a second movable surface (103) and a third movable surface (105); The first movable surface (101) and the second movable surface (103) are connected via a first end surface (102), and the second movable surface (103) and the third movable surface (105) are connected via a second end surface (104); The power element comprises a first receiving member (2), a second receiving member (3) and a third receiving member (4), and the three receiving members are all mounted on the output ends of the corresponding driving members, and driven by the corresponding driving members, the three receiving members can generate displacements that do not interfere with each other; The second receiving member (3) is movably connected to the interior of the first receiving member (2), and the third receiving member (4) is movably connected to the interior of the second receiving member (3); A first inclined surface (201) formed at the lower end of the first receiving member (2) overlaps with the first end surface (102), and a second inclined surface (301) formed at the lower end of the second receiving member (3) overlaps with the second end surface (104).

2. A press oil circuit control system according to claim 1, characterized in that: A sealed cavity a is formed between the middle parts of the first receiving member (2) and the second receiving member (3), and a sealed cavity b is formed between the middle parts of the second receiving member (3) and the third receiving member (4). Capsules (5) are bonded to the outer walls of the first receiving member (2) and the second receiving member (3). The two capsules (5) located on the outer walls of the first receiving member (2) and the second receiving member (3) are respectively connected to the sealed cavity a and the sealed cavity b, and the capsules (5) are filled with gas.

3. A press oil circuit control system according to claim 1, characterized in that: A first avoidance channel (210) is provided in the middle of the first receiving member (2), a first placement cavity (220) is provided at the lower end of the first avoidance channel (210), and the second receiving member (3) is movably connected in the first placement cavity (220).

4. A press oil circuit control system according to claim 1, characterized in that: A second avoidance channel (310) is provided in the middle of the second receiving member (3), and a second placement cavity (320) is provided at the lower end of the second avoidance channel (310).

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