Valve block machining fixture

Abstract

The utility model provides a valve block processing fixture, including benchmark installation structure and a plurality of setting work station structure on it, every work station structure includes the fixed support structure for supporting and limiting work piece, the movable clamping structure of oil cylinder drive, sets up the clamping execution component of clamping structure front end, is used for to work piece axial or radial positioning's positioning assembly to the movable clamping structure in -bedded monitoring unit of structure, monitoring unit includes sealing structure and gas path channel, forms closed air cavity after clamping and carries out positive pressure or negative pressure monitoring, exports monitoring signal, a plurality of work station structure can be symmetrically arranged on both sides of benchmark structure, and realize spacing adjustment through bolt or sliding block. The fixture can be linked with external control system, realizes work piece clamping, state monitoring and the integrated control of abnormal piece isolation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical automation assembly technology, and more specifically, to a valve block processing fixture. Background Technology

[0002] Valve blocks are widely used in hydraulic systems, pneumatic control systems, and various fluid control equipment. They are characterized by diverse structures, varying sizes, and high machining accuracy requirements. During their manufacturing process, specialized fixtures are typically used for rapid and stable positioning and clamping to complete machining operations such as milling, drilling, and tapping.

[0003] In existing technologies, rigid limit blocks are commonly used in conjunction with single-sided hydraulic or pneumatic cylinders for clamping operations, with initial positioning achieved via manual pins or limit blocks. While this type of structure offers some versatility, it has significant limitations in adapting to various product types, monitoring the processing process, and automating workflows.

[0004] First, traditional fixture structures often feature a rigid clamping and limiting design, which is prone to machining errors due to slight workpiece displacement during processing. Second, conventional monitoring systems are mostly externally mounted and rely on flexible hoses for connection with the fixture body, resulting in cumbersome layout, poor reliability, and hindering standardized mass deployment. Finally, most existing fixtures lack linkage control between clamping actions and the machining process, failing to automatically trigger machining logic after clamping status confirmation, leading to easily disrupted machining processes and increased machining risks.

[0005] In summary, there is an urgent need for a valve block machining fixture with a compact structure, high positioning reliability, and good adaptability to solve the above-mentioned technical problems and improve machining efficiency and quality control. Utility Model Content

[0006] The purpose of this application is to provide a valve block machining fixture, which integrates positioning components and multi-directional adjustable clamping structures on the fixture body to achieve rapid and high-precision positioning and stable clamping of the workpiece in the axial, radial and angular directions, so as to meet machining requirements.

[0007] This application proposes a valve block machining fixture, comprising: A reference mounting structure is used to mount the fixture as a whole onto an external platform; Multiple workstation structures are mounted on the reference mounting structure, each workstation structure including: A fixed support structure is used to support the workpiece to be processed and provide a limiting reference. A movable clamping structure is provided on the side of the fixed support structure and clamping and releasing actions are achieved by a hydraulic cylinder. A clamping actuator is connected to the front end of the movable clamping structure and is used to clamp the workpiece in conjunction with the fixed support structure. Positioning components used for positioning workpieces; The monitoring unit embedded in the movable clamping structure is used to monitor the position or clamping state of the workpiece under pressure after clamping and to output a monitoring signal.

[0008] It should be noted that the "workpiece to be processed" mentioned in this article specifically refers to materials such as solid aluminum blocks, which are machined to form valve bodies. Their surfaces usually need to be machined with features such as mounting holes and oil passages, and positioning and clamping are required to ensure machining accuracy. "Pressure monitoring" is based on the principle of gas pressure change. It judges the workpiece's positional accuracy or clamping status by detecting the pressure stability in the closed cavity. Compared with traditional mechanical inspection, it has the advantages of being non-contact, fast-responding, and less likely to damage the workpiece. "Collaborative clamping" refers to the fixed support structure providing bottom and side reference support. The clamping actuator applies clamping force from the side or top under the drive of the movable clamping structure, forming multi-directional constraints to prevent the workpiece from shifting during processing.

[0009] In existing technologies, the positioning and monitoring functions of valve block clamps are mostly designed separately, requiring manual intervention in the machining process, and the fixed positioning structure leads to poor versatility. This application adopts an integrated design of "positioning-clamping-monitoring," embedding the monitoring unit within the movable clamping structure. Monitoring can be started synchronously after the clamping action is completed, without the need for additional process changes, significantly shortening preparation time. At the same time, the fixed support structure provides basic support, the positioning components accurately constrain the workpiece posture, and the movable clamping structure ensures stable clamping force through hydraulic cylinder drive. The three work together to reliably fix the workpiece, providing a stable benchmark for subsequent machining.

[0010] Specifically, the reference mounting structure is fixed to the external worktable surface by bolts or locating pins to ensure the overall stability of the fixture position; each station structure operates independently and can process multiple valve block blanks simultaneously, improving batch processing efficiency. When the valve block blank to be processed is placed on the fixed support structure, the positioning component first provides radial and axial constraints on the valve block to prevent placement deviation; then, the hydraulic cylinder drives the movable clamping structure to move the clamping actuator closer to the valve block until it cooperates with the fixed support structure to form a stable clamp; at this time, the monitoring unit embedded in the movable clamping structure forms a closed air chamber by sealing the valve block surface, and gas at a preset pressure is introduced into the chamber through the air passage. If the air pressure remains stable, the workpiece position or clamping state is determined to be qualified; otherwise, an abnormal signal is output.

[0011] Compared with existing technologies, the core advantages of this application are: First, functional integration, which integrates positioning, clamping and monitoring functions into a single workstation structure, eliminating efficiency losses and positioning deviations caused by process fragmentation; Second, optimized monitoring method, which uses pressure monitoring to replace mechanical probes, reducing the risk of workpiece damage and improving monitoring response speed; Third, modular structure, with each workstation structure operating independently, facilitating maintenance and expansion, and multiple workstations can operate in parallel, adapting to batch production needs.

[0012] In one embodiment, the positioning component includes a limiting block and a positioning seat for radial or axial positioning of the workpiece.

[0013] The combined design of the limiting block and the positioning seat achieves multi-dimensional precise positioning of the valve block blank. "Radial positioning" is achieved by the fitting of the limiting block with the side of the valve block, restricting the lateral and longitudinal displacement of the valve block in the horizontal plane. "Axial positioning" is achieved by inserting the positioning seat into the pre-set mounting hole of the valve block, constraining not only the valve block's vertical displacement but also its rotational freedom around the vertical axis. The two positioning components work together to cover the key directions of the valve block's six degrees of freedom, ensuring that the workpiece remains in the preset reference position throughout clamping and machining, avoiding machining errors caused by positioning deviations.

[0014] Compared to the single positioning pin or stop design in the prior art, the positioning component in this embodiment has stronger compatibility: the limit block can be adapted to valve blocks of different widths by adjusting the installation position, and the positioning seat can be replaced with different diameter specifications to match the valve block mounting hole size, without having to replace the entire positioning structure, which greatly improves the fixture's adaptability to workpieces of multiple specifications.

[0015] In one embodiment, the limiting block is disposed on a fixed support structure and contacts the side of the workpiece to achieve radial limiting.

[0016] The limiting block is integrated into the fixed support structure to ensure consistency between the positioning reference and the support reference, avoiding positioning deviations caused by assembly errors of multiple components. The limiting block is made of wear-resistant alloy material with a precision-ground surface to ensure a close fit when in contact with the side of the workpiece; its installation position can be finely adjusted through the adjustment holes on the fixed support structure, for example, by using the elongated hole and bolt to achieve a radial adjustment of 0-10mm to accommodate valve blocks of different widths.

[0017] When the workpiece is placed on the fixed support structure, the vertical side of the limiting block is in close contact with the side of the workpiece, forming a rigid constraint to prevent the workpiece from shifting laterally when the clamping force is applied by the movable clamping structure. At the same time, the top of the limiting block is provided with a guide slope, which facilitates quick alignment when the workpiece is placed, reduces manual alignment time, and improves the convenience of operation.

[0018] In one embodiment, the positioning seat is inserted into the workpiece mounting hole to achieve axial limiting and rotational direction constraint.

[0019] The design of the positioning seat fully utilizes the mounting hole features of the valve block itself, eliminating the need to set additional positioning references on the workpiece surface and avoiding damage to the workpiece. It ensures smooth insertion into the hole while effectively limiting radial clearance, achieving precise axial positioning. Its length is designed according to the valve block thickness, ensuring that after insertion, it penetrates the valve block mounting hole and mates with the positioning hole on the fixed support structure, further enhancing positioning stability.

[0020] Furthermore, the cross-section of the positioning seat can be designed to be non-circular (such as D-shaped or square). When inserted into the non-circular mounting hole corresponding to the valve block, it can simultaneously restrict the rotational freedom of the valve block around the positioning seat, preventing the monitoring unit from failing to seal due to workpiece rotation during processing. The positioning seat and the fixed support structure are detachably connected. By replacing positioning seats of different diameters and shapes, valve blocks with different mounting hole specifications can be adapted, improving the versatility of the fixture.

[0021] In one embodiment, the monitoring unit includes a sealing structure connected to the gripper and an air passage for collecting pressure. The sealing structure forms a closed air chamber around the workpiece in the clamped state for positive or negative pressure monitoring.

[0022] The core of the monitoring unit lies in forming a closed space with the workpiece through a sealed structure, and using changes in gas pressure to determine the clamping status or workpiece position. Specifically, it can be divided into two modes: positive pressure monitoring and negative pressure monitoring. In positive pressure monitoring, compressed air is introduced into the closed air chamber through the air passage to the preset pressure, and then the air inlet valve is closed. If the pressure drop in the air passage is less than the threshold within the set time, the workpiece clamping status is determined to be qualified or the position is accurate. In negative pressure monitoring, the closed air chamber is evacuated to the preset negative pressure by a vacuum pump. If the pressure rise is less than the threshold, it is determined to be qualified.

[0023] The sealing structure is made of elastic rubber, and its shape is designed according to the contour of the area to be monitored on the valve block (such as ring or rectangle) to ensure a tight fit with the workpiece surface under clamping force, preventing gas leakage from affecting monitoring accuracy. The sealing structure and the gripper are embedded and move synchronously with the gripper, ensuring that the sealing structure is in precise contact with the workpiece surface to form a closed cavity when the clamping action is completed. The air passage has a built-in pressure sensor and solenoid valve. The pressure sensor collects air chamber pressure data in real time and transmits it to the external control system, while the solenoid valve controls the opening and closing of the air passage, realizing automated control of the monitoring process.

[0024] In one embodiment, the active clamping structure and the monitoring unit are integrated into a single structure as an integrated module, and the clamping state is maintained when an abnormality is detected to prevent the workpiece from shifting or being damaged during processing.

[0025] The integrated design of the movable clamping structure and monitoring unit significantly reduces connection gaps and assembly errors between components, ensuring that the sealing structure of the monitoring unit can move precisely and synchronously with the clamps, thus improving monitoring stability. The integrated module contains both hydraulic and pneumatic channels, providing power and media transmission for the hydraulic cylinder drive and pressure monitoring respectively, avoiding interference problems caused by cluttered external piping.

[0026] The key feature of this integrated module is its "abnormal locking" function: when the monitoring unit detects an abnormality in workpiece clamping (such as abnormal pressure), the external control system sends a holding signal to the hydraulic cylinder of the movable clamping structure, maintaining the current clamping pressure and preventing the grippers from loosening and causing the workpiece to shift or be damaged during processing. Only after manual confirmation of the abnormality and issuance of an unlocking command will the hydraulic cylinder drive the grippers to loosen, effectively avoiding processing defects. Furthermore, the integrated module is equipped with status indicator lights, displaying green when the condition is satisfactory and red and emitting an alarm sound when an abnormality occurs, allowing operators to quickly identify the monitoring results.

[0027] In one embodiment, the movable clamping structure includes a pair of symmetrical jaw structures, wherein at least one jaw is provided with the air port and sealing component of the monitoring unit.

[0028] The symmetrical gripper structure employs a "counter-clamping" method, applying clamping force simultaneously from both sides of the workpiece to ensure uniform force distribution and prevent deformation or displacement of the workpiece due to unilateral force. The clamping stroke of the grippers can be adjusted via the hydraulic cylinder's stroke adjustment device to accommodate valve blocks of different thicknesses. The gripping surfaces of the grippers are equipped with anti-slip textures to enhance friction with the workpiece surface, further improving clamping reliability.

[0029] At least one side of the gripper is equipped with the air port and sealing assembly of the monitoring unit, which can be flexibly configured according to monitoring needs: if only one side of the workpiece's position or clamping status needs to be monitored, the monitoring assembly can be set on only one side of the gripper; if both sides need to be monitored (such as when both sides of a valve block have key features), the monitoring assembly can be set on both sides of the gripper to achieve synchronous monitoring. The air port and air passage are connected by quick-connect couplings, which facilitates the maintenance and replacement of the monitoring unit; the sealing assembly is fixed to the gripper with bolts, and different specifications of sealing gaskets can be quickly replaced according to the shape of the workpiece's monitoring area, improving the adaptability of the fixture.

[0030] In one embodiment, multiple workstation structures are symmetrically arranged on both sides of a reference mounting structure, and the adjustable spacing is achieved through bolts or slider structures.

[0031] The symmetrical arrangement of the workstations fully utilizes the space of the reference mounting structure, improving processing efficiency per unit area. For example, setting 2-4 workstations on each of the left and right sides of the reference mounting structure allows for the simultaneous processing of 4-8 valve block blanks. The adjustable workstation spacing is achieved in two ways: First, the reference mounting structure has elongated holes along its length. The workstation structure uses bolts to engage with these holes; loosening the bolts allows for sliding along the holes to adjust the workstation spacing, and tightening the bolts after adjustment secures it. Second, a slider structure is used. The reference mounting structure has guide rails, and the bottom of the workstation structure has sliders that engage with the guide rails. A locking handle controls the fixing and sliding of the sliders, enabling rapid adjustment of the workstation spacing.

[0032] The advantages of this design are: the station spacing can be flexibly adjusted according to the size of the valve block blank. For example, when processing small valve blocks, the spacing can be reduced to increase the number of stations; when processing large valve blocks, the spacing can be increased to avoid interference between workpieces. At the same time, when a certain station structure fails, it can be disassembled and maintained separately without affecting the normal operation of other stations, thus improving the maintainability of the equipment.

[0033] In one embodiment, the air passage is connected to an external control system, which receives monitoring signals and automatically controls the clamp's movement.

[0034] The external control system uses a PLC (Programmable Logic Controller) as the core control unit. It connects to the pressure sensors in the pneumatic passage and the solenoid valves of the hydraulic cylinder via data cables to achieve automated control of the monitoring process. The specific control flow is as follows: 1. After the workpiece is placed in position, the operator triggers the start button. The control system sends a signal to the positioning component to complete the workpiece positioning; 2. The control system energizes the solenoid valve of the hydraulic cylinder, driving the movable clamping structure to clamp the workpiece; 3. After the clamping action is completed, the control system sends a monitoring signal to the monitoring unit, opening the solenoid valve to either fill the closed air chamber with air or evacuate it; 4. The pressure sensor collects pressure data and transmits it to the control system. The control system compares the actual pressure change with a preset threshold to determine if the workpiece clamping state is qualified; 5. If qualified, the control system maintains the hydraulic cylinder clamping state, allowing the machine tool to start processing; if unqualified, the control system maintains the hydraulic cylinder clamping state and issues an alarm signal to prevent processing from proceeding.

[0035] In one embodiment, the fixed support structure is provided with an adjustable limiting groove, the size of which can be adapted to the fixture to fit workpieces of different specifications.

[0036] An adjustable limiting groove is located at the top of the fixed support structure, extending along the length or width of the workpiece, to limit the placement position of the workpiece on the fixed support structure. The size adjustment of the limiting groove is achieved through a movable stop: a sliding movable stop is provided inside the limiting groove, and a locking bolt is provided on the movable stop. Loosening the locking bolt allows the movable stop to slide along the limiting groove, adjusting the distance between the movable stop and the fixed stop to accommodate valve blocks of different lengths or widths; after adjustment, tightening the locking bolt fixes the position of the movable stop.

[0037] The movable stop has graduated lines on its side, allowing operators to precisely adjust the size of the limit groove. For example, the graduation accuracy can reach 0.1mm, ensuring consistent positioning reference for workpieces of different specifications. Furthermore, the top of the movable stop has a rounded transition to prevent workpieces from colliding with the stop during placement, protecting the workpiece surface from damage. The adjustable limit groove design further enhances the versatility of the fixed support structure, allowing it to accommodate various sizes of valve block blanks without replacing the entire fixed support structure, thus reducing equipment investment costs.

[0038] Compared with the prior art, the present invention has the following beneficial effects: Firstly, it achieves an integrated design of clamping and monitoring, improving the device's integration and reliability. This utility model embeds the monitoring unit inside the movable clamping structure, eliminating the need for an additional external monitoring module. This reduces system wiring complexity and improves the consistency and response efficiency of pressure monitoring, making it suitable for integrated production lines with compact spaces or high processing requirements.

[0039] Secondly, it enhances the combined control capability of workpiece positioning and clamping. By introducing a dual positioning mechanism consisting of limit blocks and positioning seats into the workstation structure, it achieves comprehensive constraint on the radial, axial, and rotational directions of the workpiece. Combined with symmetrically arranged clamping components, it ensures uniform clamping force and high positional accuracy, significantly improving machining stability and reliability.

[0040] Third, it enhances processing safety and quality traceability. The monitoring unit is linked to the clamping action, maintaining a clamped state in case of monitoring abnormalities or improper clamping, preventing workpiece displacement or damage during processing. This helps to build a closed-loop process management system and meets the requirements for quality traceability and anomaly interception in high-quality production processes.

[0041] Fourth, it possesses excellent assembly flexibility and universal adaptability. Each workstation structure is set on the reference mounting structure via slide rails or bolts, allowing for quick adjustment of the fixture spacing according to the workpiece size. Adjustable limit grooves also enable adaptation to different valve block models, improving the equipment's versatility and changeover efficiency.

[0042] Fifth, it facilitates system integration and automated control. The pneumatic circuit is connected to an external control system, enabling real-time feedback of monitoring signals to the automation controller, thus achieving synchronous management of the fixture's motion status and monitoring data. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the valve block machining fixture of this application.

[0044] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model.

[0045] Explanation of main component symbols Reference mounting structure 10; Workstation structure 20; Fixed support structure 30; Movable clamping structure 40; Clamping actuator 50; Positioning component 60; limiting block 61; positioning seat 62; Monitoring Unit 70. Detailed Implementation

[0046] Example: Traditional valve block machining fixtures generally suffer from the following technical limitations: Firstly, the clamping device and monitoring device are usually separate, requiring complex external air circuit connections and additional monitoring mechanisms for status monitoring. This results in a cumbersome overall structure, messy wiring, and difficulty in placement in space-constrained environments. Secondly, the positioning mechanism has a simple structural form and lacks comprehensive constraints on the axial, radial, and rotational directions of the workpiece. This makes the machining results susceptible to workpiece posture deviations, reducing clamping stability and machining accuracy. Furthermore, monitoring and clamping actions are often controlled independently, lacking linkage. This can easily lead to accidental machining when clamping is not in place, causing machining errors and process risks.

[0047] To address the aforementioned issues, the applicant recognized the need to develop a multi-station valve block machining fixture solution with higher integration, stronger clamping and monitoring linkage, and higher positioning reliability. While meeting clamping strength and machining accuracy requirements, the monitoring unit should be embedded within the movable clamping structure to create an integrated clamping and monitoring mechanism, thereby improving system integration. Simultaneously, a composite positioning component should be introduced to achieve multi-dimensional limiting of the valve block to be machined, improving clamping rigidity and machining stability. Furthermore, the fixture's movement status should be controlled through monitoring signal feedback to prevent errors and intercept defective products, adapting to high-precision, highly automated machining processes.

[0048] Therefore, as Figure 1 As shown, this application proposes a valve block machining fixture, comprising: The reference mounting structure 10 is used to mount the fixture as a whole onto the external platform; Multiple workstation structures 20 are disposed on the reference mounting structure 10, and each workstation structure 20 includes: Fixed support structure 30 is used to support the workpiece to be processed and provide a limiting reference. The movable clamping structure 40 is disposed on the side of the fixed support structure 30 and is driven by a hydraulic cylinder to achieve clamping and releasing actions; The clamping actuator 50 is connected to the front end of the movable clamping structure 40 and is used to clamp the workpiece in cooperation with the fixed support structure 30. Positioning component 60 for positioning workpiece; The monitoring unit 70, embedded in the movable clamping structure 40, is used to monitor the position or clamping state of the workpiece under pressure after clamping and output a monitoring signal.

[0049] Compared with existing technologies, traditional valve block machining fixtures are mostly designed with separate clamping mechanisms and monitoring devices, resulting in complex air circuit connections, delayed monitoring response, and limited assembly space.

[0050] This application embeds a monitoring unit 70 within the active clamping structure 40, enabling clamping and monitoring to be completed within the same execution structure. This achieves synchronous linkage between clamping and monitoring actions, significantly improving monitoring response speed and structural compactness, while reducing the risk of gas leakage and the difficulty of system integration.

[0051] The positioning component 60 includes a limiting block 61 and a positioning seat 62, which are used to position the workpiece radially or axially.

[0052] Compared with existing technologies, traditional fixtures typically rely on a single limiting surface for workpiece positioning, making it difficult to achieve positioning accuracy in both radial and axial directions. This application achieves dual radial and axial positioning of the workpiece by setting up a composite positioning component 60 consisting of a limiting block 61 and a positioning seat 62, thereby improving the stability and repeatability of the workpiece during processing.

[0053] The limiting block 61 is disposed on the fixed support structure 30 and contacts the side of the workpiece to achieve radial limiting.

[0054] Compared with existing technologies, the limiting block 61 of traditional fixtures is mostly a fixed structure, and the positioning accuracy is greatly affected by the shape of the workpiece and installation errors. This application sets the limiting block 61 on the fixed support structure 30, so that it directly contacts the side of the workpiece to form a stable radial limiting support, which effectively prevents the lateral displacement of the workpiece during the processing and improves the clamping stability.

[0055] The positioning seat 62 is inserted into the workpiece mounting hole to achieve axial limiting and rotational direction constraint.

[0056] Compared with existing technologies, existing valve block machining fixtures mostly rely on friction or clamping force to restrict the axial movement of the workpiece, which can easily lead to machining errors. This application sets a positioning seat 62 in the station structure 20 and inserts it into the workpiece mounting hole to form a rigid constraint. This not only achieves axial positioning but also limits the rotation direction of the workpiece, ensuring the consistency of posture and monitoring accuracy during the machining process.

[0057] The monitoring unit 70 includes a sealing structure connected to the grippers and an air passage for pressure acquisition. When clamped, the sealing structure forms a closed air chamber around the workpiece for positive or negative pressure monitoring. Compared to existing technologies, traditional monitoring systems often rely on external nozzles or hoses, resulting in long air paths, poor sealing performance, and slow response. This application integrates a sealing structure and an air passage at the end of the grippers, forming a closed air chamber after clamping, enabling direct positive or negative pressure monitoring, shortening the air path length, and improving monitoring sensitivity and stability.

[0058] The movable clamping structure 40 and the monitoring unit 70 are integrated into a single structure in the form of an integrated module, and maintain the clamping state to prevent the workpiece from shifting or being damaged during processing when the monitoring is abnormal.

[0059] Compared with existing technologies, existing fixtures typically release the workpiece immediately when an anomaly is detected, which can easily cause workpiece displacement or machining defects. This application designs the movable clamping structure 40 and the monitoring unit 70 as an integrated module, and automatically maintains the clamping state when an anomaly is detected, thereby achieving physical isolation and automatic error prevention of abnormal workpieces and improving the overall quality control capability of the production line.

[0060] The movable clamping structure 40 includes a pair of symmetrical jaw structures, wherein at least one jaw is provided with the air port and sealing component of the monitoring unit 70.

[0061] Compared with existing technologies, traditional clamps often use single-sided clamping or asymmetrical jaw structures, resulting in uneven clamping force distribution and deviations in machining data. This application adopts a pair of symmetrically arranged jaw structures, with at least one side integrating a monitoring air port and sealing components, achieving bidirectional force application and integrated sealing monitoring, thus improving clamping balance and monitoring reliability.

[0062] Multiple workstation structures 20 are symmetrically arranged on both sides of the reference mounting structure 10, and the spacing is adjustable through bolts or sliders.

[0063] Compared with existing technologies, traditional multi-station fixtures are mostly fixed installation structures with non-adjustable station spacing, making it difficult to adapt to workpieces of different sizes. This application symmetrically arranges multiple station structures 20 on both sides of the reference installation structure 10 and uses bolts or slider mechanisms to achieve spacing adjustment, which has good flexible configuration capabilities and improves the system's versatility and modularity.

[0064] The gas path channel is connected to an external control system, and the control system is configured to receive monitoring signals and automatically control the action state of the fixture.

[0065] Compared with the prior art, traditional monitoring systems usually require manual reading of air pressure signals or connection of an independent external controller, resulting in a low degree of automation. In the present application, by connecting the gas path channel to the external control system, monitoring signals can be output in real time to cooperatively control the action state of the fixture, so as to realize integrated closed-loop management of monitoring, feedback and control.

[0066] The fixed support structure 30 is provided with an adjustable limiting groove, and the size of the limiting groove and the fixture can be adapted to workpieces of different specifications in a matching manner.

[0067] Compared with the prior art, when replacing workpieces of different specifications, traditional fixtures require manual debugging of limiting components or replacement of clamping jaws, which is cumbersome in operation and low in efficiency. In the present application, by providing the adjustable limiting groove on the fixed support structure 30, the fixture can flexibly adapt to valve block workpieces of different sizes or models, which significantly improves the model change speed and adaptability.

[0068] The above described embodiments only represent several implementation modes of the present utility model, and the descriptions thereof are relatively specific and detailed, but shall not be construed as a limitation on the patent scope of the present utility model. It should be noted that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present utility model, and all of these shall fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A valve block machining fixture, characterized in that, include: The reference mounting structure (10) is used to mount the fixture as a whole onto the external platform; Multiple workstation structures (20) are disposed on the reference mounting structure (10), each workstation structure (20) comprising: A fixed support structure (30) is used to support the workpiece to be processed and provide a limiting reference. The movable clamping structure (40) is located on the side of the fixed support structure (30) and is driven by a hydraulic cylinder to achieve clamping and releasing actions; The clamping actuator (50) is connected to the front end of the movable clamping structure (40) and is used to clamp the workpiece in cooperation with the fixed support structure (30); Positioning component (60) for positioning workpiece; The monitoring unit (70) embedded in the movable clamping structure (40) is used to monitor the position or clamping state of the workpiece under pressure after clamping and output a monitoring signal.

2. The valve block machining fixture as described in claim 1, characterized in that: The positioning component (60) includes a limiting block (61) and a positioning seat (62) for radial or axial positioning of the workpiece.

3. The valve block machining fixture as described in claim 2, characterized in that: The limiting block (61) is disposed on the fixed support structure (30) and contacts the side of the workpiece to achieve radial limiting.

4. The valve block machining fixture as described in claim 2, characterized in that: The positioning seat (62) is inserted into the workpiece mounting hole to achieve axial positioning and rotation direction constraint.

5. The valve block machining fixture as described in claim 1, characterized in that: The movable clamping structure (40) includes a pair of symmetrical jaw structures, wherein at least one jaw structure is provided with the air port and sealing assembly of the monitoring unit (70).

6. The valve block machining fixture as described in claim 5, characterized in that: The monitoring unit (70) includes a sealing structure connected to the gripper structure and an air passage for collecting pressure. The sealing structure forms a closed air cavity around the workpiece in the clamped state to monitor positive or negative pressure.

7. The valve block machining fixture as described in claim 6, characterized in that: The air passage is connected to an external control system, which receives monitoring signals and automatically controls the movement of the clamp.

8. The valve block machining fixture as described in claim 1, characterized in that: The active clamping structure (40) and the monitoring unit (70) are integrated into one unit in the form of an integrated module, and maintain the clamping state to prevent the workpiece from shifting or being damaged during processing when the monitoring is abnormal.

9. The valve block machining fixture as described in claim 1, characterized in that: Multiple workstation structures (20) are symmetrically arranged on both sides of the reference mounting structure (10), and the adjustable spacing is achieved by bolts or sliders.

10. The valve block machining fixture as described in claim 1, characterized in that: The fixed support structure (30) is provided with an adjustable limiting groove, the size of which can be adapted to the fixture to fit workpieces of different specifications.

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