A flat hydraulic clamp for drilling holes at the P port of a valve body

Abstract

This utility model relates to the field of flat plate clamping technology, specifically to a flat plate hydraulic clamping fixture for drilling the P-port of a valve body. It includes a vertical plate, with a mounting plate fixedly connected to one side of the middle portion of the vertical plate. The mounting plate is inclined on the vertical plate. A hydraulic cylinder is mounted on the middle of one end face of the mounting plate, and a piston rod is driven by one side of the hydraulic cylinder. A pressure arm is provided at the upper end of the piston rod, and pressure plates are fixedly connected to both sides of the pressure arm. Support seats for placing valve bodies are fixedly connected to both sides of the middle of one end face of the mounting plate. The two pressure plates are respectively positioned at the upper ends of two valve bodies. A positioning mechanism is provided on the support seat to ensure the stability of the valve body during drilling. Compared with the prior art, this application solves the problems of inaccurate positioning, low clamping efficiency, and unfriendly operation for oblique hole machining in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of flat plate clamping technology, and in particular to a flat plate hydraulic clamping tool for drilling holes in the P port of a valve body. Background Technology

[0002] As a key component in fluid control systems, the valve body often requires various forms of machining to meet the connection requirements of different application scenarios. Among these, the valve body's P-port, a specific connection hole in hydraulic or pneumatic systems, is sometimes required to be machined as an angled hole to meet specific spatial adaptation or flow channel layout requirements. However, machining angled holes is more prone to errors than machining vertical holes. If the valve body's installation and positioning are not precise during machining, problems such as drill axis misalignment and incorrect hole angles can easily occur, affecting the product's subsequent sealing and assembly performance.

[0003] Existing drilling fixtures are mostly general-purpose jigs, which are difficult to adjust the angle and optimize the positioning according to the specific characteristics of the valve body structure. Especially when dealing with products with oblique holes at the P port, manual angle measurement and multiple trial adjustments are often required, resulting in low processing efficiency and large repeatability errors. At the same time, in order to ensure the stability of the workpiece during the drilling process, some jigs also need to rely on external limit blocks, bolt fastening and other auxiliary methods, which are not only cumbersome to operate, but also easy to introduce errors due to human factors, resulting in drilling deviation.

[0004] Furthermore, we disclose a flat-plate hydraulic clamp for drilling the P port of a valve body to meet the practical needs of existing technologies, which suffer from inaccurate positioning, low clamping efficiency, and unfriendly operation for oblique hole machining. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a flat hydraulic clamp for drilling the P port of the valve body, so as to solve the problems of inaccurate positioning, low clamping efficiency and unfriendly operation for oblique hole processing in the prior art.

[0006] To achieve the above objectives, this utility model provides a flat hydraulic clamp for drilling the P-port of a valve body, comprising a vertical plate, a mounting plate fixedly connected to one side of the middle portion of the vertical plate, the mounting plate being inclined on the vertical plate, a hydraulic cylinder mounted on the middle of one end face of the mounting plate, a piston rod driven by one side of the hydraulic cylinder, a pressure arm provided at the upper end of the piston rod, pressure plates fixedly connected to both sides of the pressure arm, and support seats for placing valve bodies fixedly connected to both sides of the middle of one end face of the mounting plate, the two pressure plates being respectively located at the upper ends of two valve bodies, and a positioning mechanism provided on the support seat to ensure the stability of the valve body during drilling.

[0007] Preferably, a connecting rod is installed at the upper end of the piston rod, both ends of the connecting rod penetrate the piston rod, and the pressure arm is installed at the upper end of the piston rod through the connecting rod.

[0008] Preferably, a posture spring is provided at the upper middle part of the pressure arm, and the posture spring is installed at the upper end of the piston rod by screws.

[0009] Preferably, the positioning mechanism includes a central positioning pin installed in the middle of the support base. The diameter of the central positioning pin is the same as the inner diameter of the valve body, and the valve body is mounted on the support base by being sleeved on the outside of the central positioning pin.

[0010] Preferably, a spring pin is slidably connected to one side of the support base, the lower end of the spring pin passes through the support base and extends into the interior of the upright plate, and a plug is threadedly connected to the lower end of the mounting plate on one side of the spring pin. A retaining spring is installed at the end of the plug near the spring pin, and the end of the retaining spring away from the plug is fixedly connected to the oil cylinder.

[0011] Preferably, an anti-misalignment guide block is fixedly connected to one side of the upper end face of the support base. The anti-misalignment guide block is crescent-shaped, and when the valve body is installed on the support base, the outer wall of the anti-misalignment guide block fits into the groove on the valve body.

[0012] The beneficial effects of this utility model are:

[0013] 1. The flat hydraulic fixture for drilling the P-port of the valve body uses an inclined mounting plate on the vertical plate to install the valve body at a preset angle in the fixture. This ensures that the drilling axis of the P-port inclined hole is coaxially aligned with the main spindle drill bit, solving the problem that existing general-purpose fixtures cannot be adapted to inclined hole machining and require repeated manual angle adjustments. This structure significantly improves the accuracy and consistency of drilling positioning, effectively reducing quality problems such as hole position deviation and poor assembly caused by positioning errors, and meeting the high-precision machining requirements of inclined hole valve bodies.

[0014] 2. This flat hydraulic clamp for drilling the P port of the valve body adopts a hydraulically driven pressure arm mechanism with a central positioning pin, anti-misalignment guide block and other multiple limiting structures, which can realize the all-round restriction of the six degrees of freedom of the workpiece. There is no need to add screws, limit blocks and other cumbersome processes, which improves clamping efficiency and safety. The clamping structure is stable and compact, and has good automation adaptability. It improves the problems of cumbersome clamping operation, poor repeatability and low efficiency of traditional clamping fixtures. It is suitable for batch and high consistency valve body oblique hole processing scenarios. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation of the support base of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the support base of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0021] The diagram is marked as follows:

[0022] 1. Vertical plate; 2. Mounting plate; 3. Hydraulic cylinder; 4. Pressure arm; 5. Posture spring; 6. Connecting rod; 7. Pressure plate; 8. Center positioning pin; 9. Piston rod; 10. Contact spring; 11. Support seat; 12. Anti-misalignment guide block; 13. Spring pin; 14. Plug. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 5 As shown, a flat hydraulic clamp for drilling a hole in the P port of a valve body includes a vertical plate 1, a mounting plate 2, an oil cylinder 3, a piston rod 9, a pressure arm 4, a pressure plate 7, a support seat 11, a center positioning pin 8, a posture spring 5, a connecting rod 6, an anti-misalignment guide block 12, a spring pin 13, a plug 14, and an anti-collision spring 10.

[0026] First, the upright plate 1 is the main load-bearing component of the fixture, used to support all clamping and positioning structures. It is made of a metal material with high rigidity and low deformation, ensuring good stability and torsional performance during hydraulic loading and drilling.

[0027] To achieve precise machining of the valve body's P port, since some valve body P ports are oblique holes, the mounting plate 2 is tilted relative to the vertical plate 1 at a certain angle. This angle is designed based on actual machining requirements, so that when the valve body is installed, the drilling axis of its P port can be coaxially aligned with the spindle drill bit, thereby effectively avoiding problems such as inaccurate drilling position and hole deviation caused by angular deviation. This structural design solves the problem that the general-purpose fixtures in the existing technology cannot adapt to oblique hole positioning, and improves drilling accuracy and product consistency.

[0028] A hydraulic cylinder 3 is installed in the middle of one side end face of the mounting plate 2. The hydraulic cylinder 3 is connected to an external hydraulic system to realize automatic lifting control. The output end of the hydraulic cylinder 3 is connected to a piston rod 9. A pressure arm 4 is installed on the upper end of the piston rod 9 through a connecting rod 6, which is used to press the valve body to be processed downward under hydraulic drive.

[0029] Both ends of the connecting rod 6 pass through the piston rod 9 and extend laterally, allowing the pressure arm 4 to achieve better force distribution and avoiding skewing or localized stress concentration during the clamping process. To improve the smoothness and rebound of the pressure arm 4's movement, a posture spring 5 is also installed at the upper middle part of the pressure arm 4. One end of the spring is connected to the piston rod 9 by a screw, while the other end extends freely, providing a certain amount of cushioning force during the descent of the pressure arm 4, thus improving the stability and safety of the clamping process.

[0030] A pressure plate 7 is installed on each side of the pressure arm 4. The pressure plate 7 is used to directly contact the upper surface of the valve body to prevent the workpiece from shifting due to vibration during processing. The setting of the pressure plate 7 allows the clamping effect to be evenly distributed on both sides of the valve body. Combined with the hydraulic loading force, it ensures the valve body is firmly fixed during processing.

[0031] Support seats 11 are fixedly connected to both ends of one side of the mounting plate 2. The support seats 11 are the main support parts of the valve body. A central positioning pin 8 is provided on it. The diameter of the positioning pin matches the diameter of the inner hole of the valve body. After the valve body is fitted onto the central positioning pin 8, it can achieve dual positioning in the lateral and rotational directions, which solves the problems of inaccurate positioning and easy swaying in the prior art and effectively ensures the repeatability accuracy of the machined hole position.

[0032] To prevent incorrect installation of the valve body, a mis-proof guide block 12 is provided on one side of the upper end of the support base 11. The guide block is crescent-shaped, and its outer wall fits into a specific groove on the valve body shell. When the valve body is not placed in the correct posture, it cannot be fully positioned, thus realizing a structured design to prevent reverse installation and misalignment. This structure avoids drilling misalignment or scrap caused by assembly errors, and improves clamping efficiency and process consistency.

[0033] To enhance the longitudinal stability of the valve body in the support base 11, a spring pin 13 is slidably connected to one side of the support base 11. The lower end of the spring pin 13 passes through the support base 11 and extends into the interior of the vertical plate 1. It achieves a limiting position by cooperating with the plug 14 at the lower end of the mounting plate 2. The plug 14 is fixed to the mounting plate 2 by a threaded connection. It is equipped with an abutment spring 10. One end of the spring contacts the plug 14, and the other end abuts against the body of the spring pin 13. After the machining is completed, it helps the reset device. This mating structure is used to push the valve body away from the central positioning pin 8 when the hydraulic system is released, thereby improving the automation capability and ease of use of the fixture.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0035] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A valve body P port drilling flat plate hydraulic clamp, characterized in that: The system includes a vertical plate (1), a mounting plate (2) is fixedly connected to one side of the middle part of the vertical plate (1), the mounting plate (2) is inclined on the vertical plate (1), a hydraulic cylinder (3) is installed in the middle of one side end face of the mounting plate (2), a piston rod (9) is driven on one side of the hydraulic cylinder (3), a pressure arm (4) is provided at the upper end of the piston rod (9), pressure plates (7) are fixedly connected to both sides of the pressure arm (4), and support seats (11) for placing valve bodies are fixedly connected to both sides of the middle of one side end face of the mounting plate (2), and the two pressure plates (7) are respectively set at the upper ends of the two valve bodies; The support base (11) is provided with a positioning mechanism, which includes a central positioning pin (8) installed in the middle of the support base (11). The diameter of the central positioning pin (8) is the same as the inner diameter of the valve body, and the valve body is mounted on the support base (11) by being sleeved on the outside of the central positioning pin (8). A spring pin (13) is slidably connected to one side of the support base (11). The lower end of the spring pin (13) passes through the support base (11) and extends into the interior of the upright plate (1). A plug (14) is threadedly connected to the lower end of the mounting plate (2) on one side of the spring pin (13). A stop spring (10) is installed on the end of the plug (14) near the spring pin (13). A mis-proof guide block (12) is fixedly connected to one side of the upper end face of the support base (11). The mis-proof guide block (12) is crescent-shaped. When the valve body is installed on the support base (11), the outer wall of the mis-proof guide block (12) fits into the groove on the valve body.

2. The valve body P-port drilled flat plate hydraulic clamp according to claim 1, characterized in that: A connecting rod (6) is installed at the upper end of the piston rod (9), and both ends of the connecting rod (6) pass through the piston rod (9). The pressure arm (4) is installed at the upper end of the piston rod (9) through the connecting rod (6).

3. The valve body P-port drilled flat plate hydraulic clamp according to claim 1, characterized in that: A posture spring (5) is provided at the upper middle part of the pressure arm (4), and the posture spring (5) is installed on the upper end of the piston rod (9) by screws.

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