Valve sleeve micro-hole processing equipment

Abstract

The application provides a valve sleeve micro-hole machining device and relates to the technical field of automobile parts. The valve sleeve micro-hole machining device comprises a bearing base, the bearing base is sleeved on a base shaft, a positioning device is arranged on the bearing base, a plurality of positioning structures matched with a workpiece to be machined are arranged on the positioning device, the positioning structures are used at least for supporting and positioning the workpiece to be machined, a detection device is arranged close to the workpiece to be machined, the detection device is used at least for recording the position of the workpiece to be machined, and a control device is electrically connected with the detection device, the base shaft and the positioning device, and the control device is used at least for adjusting and fixing the position of the workpiece to be machined. The scheme solves the problem that the position of the oil outlet hole of the valve sleeve cannot be effectively adjusted and controlled in the prior art.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and more specifically, to a valve sleeve micro-hole processing equipment. Background Technology

[0002] When machining the oil outlet hole of the valve sleeve, the electrode wire needs to be inserted into the bottom of the oil outlet countersunk hole with a diameter of approximately 0.5 mm for electrical discharge machining (EDM). If the positional deviation between the oil outlet hole and the countersunk hole is too large, i.e., the electrode wire is too far off from the center of the countersunk hole, it will cause unexpected discharge between the electrode wire and the opening or wall of the countersunk hole, resulting in changes in the diameter of the electrode wire. This leads to instability and out-of-tolerance in the diameter and flow rate of the oil outlet hole during continuous machining. Therefore, controlling the positional accuracy of the oil outlet hole of the valve sleeve is crucial. When machining the oil inlet hole of the valve sleeve, the electrode wire needs to be inserted into the bottom of the side countersunk hole for EDM. The other side of the oil inlet hole is the cylindrical surface of the valve sleeve's central hole. If the positional deviation between the oil inlet hole and the side countersunk hole is too large, it will affect the shape of the oil inlet hole outlet and cause high-pressure oil to flow eccentrically into the injector control chamber, thus affecting the movement of the needle valve. Therefore, the positional accuracy of the oil inlet hole of the valve sleeve should also be properly controlled.

[0003] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0004] The main objective of this invention is to provide a valve sleeve micro-hole processing device to solve the problem that the position of the oil outlet hole of the valve sleeve cannot be effectively adjusted and controlled in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a valve sleeve micro-hole processing device is provided, comprising: a support base sleeved on a base shaft; a positioning device disposed on the support base, the positioning device having a plurality of positioning structures matching the workpiece to be processed, the positioning structures being used at least for supporting and positioning the workpiece to be processed; a detection device disposed close to the workpiece to be processed, the detection device being used at least for recording the position of the workpiece to be processed; and a control device electrically connected to the detection device, the base shaft, and the positioning device, the control device being used at least for adjusting and fixing the position of the workpiece to be processed.

[0006] Furthermore, the valve sleeve micro-hole processing equipment also includes: a tool clamping device, which is electrically connected to the control device, and a processing head is provided on the tool clamping device for processing the workpiece.

[0007] Furthermore, the workpiece to be processed is a valve sleeve, which has a first feature hole, a second feature hole, and a third feature hole, wherein the positioning structure is used to position at least one of the first feature hole and the second feature hole.

[0008] Furthermore, the detection device includes an imager, which is positioned above at least one of the workpiece and the tool clamping device. The imager is used to detect the positional and angular deviations of the workpiece. The control device is connected to the base shaft and the imager, and is used to control the base shaft to move the support base.

[0009] Furthermore, there are two positioning devices, which are arranged at a distance from each other. One positioning device, which is closer to the tool clamping device, is used for clamping and positioning the valve sleeve, and the other positioning device is used for moving and positioning the valve sleeve.

[0010] Furthermore, the positioning device includes a first positioning device, which includes: a first positioning seat extending along a first preset direction and rotatably mounted on a bearing base; and a first positioning structure, one end of which is connected to the first positioning seat, and the other end of which protrudes from the first positioning seat and forms a mating structure that cooperates with the first feature hole; wherein the first positioning structure has a bearing state connected to the first feature hole and an unloading state separated from the first feature hole, and when the first positioning structure is in the bearing state, the first positioning seat can drive the valve sleeve to rotate.

[0011] Furthermore, the first positioning device also includes a clamping structure, the first end of which is connected to the first positioning seat, and the second end of which is provided with an adjusting member. The adjusting member has a clamping state that controls the clamping structure to abut against the valve sleeve, and a releasing state that controls the clamping structure to separate from the valve sleeve.

[0012] Furthermore, the positioning device also includes a second positioning device, which includes: a second positioning seat, which is disposed at a distance from the first positioning seat and extends along a first preset direction; a guide bracket, which is movably disposed on the second positioning seat; and a second positioning structure, one end of which is connected to the guide bracket, and the other end of which is provided with a mating structure that mates with the second feature hole. The second positioning structure has a positioning state in which it is mated with the second feature hole, and a separation state in which it is separated from the second feature hole. The guide bracket can drive the second positioning structure to move, thereby adjusting the relative angle and height between the second positioning structure and the second feature hole.

[0013] Furthermore, the second positioning device also includes an elastic element, one end of which is connected to the second positioning structure and the other end of which is connected to the guide bracket. When the valve sleeve rotates about the axis of the first positioning seat, the elastic element is used to push the second positioning structure to identify the second feature hole and switch to the positioning state.

[0014] Furthermore, the second positioning device also includes a stop plate, which is disposed on the side of the second positioning seat away from the second positioning structure. The stop plate is provided with a stepped structure, which is used to engage with the guide bracket to control the second positioning structure to switch to the separated state.

[0015] Applying the technical solution of this invention, after the positioning device positions the workpiece, the detection device records the position coordinates of the workpiece. After the current workpiece is processed, the workpiece is replaced. At this time, the control device can calculate the deviation of the current workpiece relative to the positioning device based on the coordinate system of the previous workpiece recorded by the detection device. Then, the control device controls the base shaft to rotate or move, thereby driving the bearing base and the positioning device to perform position compensation adjustment on the workpiece, ensuring that the position of the workpiece is aligned, so as to facilitate the processing of the replaced workpiece. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of a first embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown;

[0018] Figure 2 A schematic diagram of a second embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown;

[0019] Figure 3 A schematic diagram of a third embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown;

[0020] Figure 4 A schematic diagram of a fourth embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown;

[0021] Figure 5 A schematic diagram of a fifth embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown;

[0022] Figure 6 A schematic diagram of the sixth embodiment of the valve sleeve micro-hole processing equipment according to the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Base shaft; 2. Bearing base; 3. Second positioning seat; 4. Guide bracket; 5. Second positioning structure; 6. Elastic element; 10. First positioning device; 11. Stop plate; 12. First positioning seat; 13. First positioning structure; 14. Clamping structure; 15. Adjusting element; 16. Valve sleeve; 161. First feature hole; 162. Second feature hole; 163. Third feature hole; 17. Tool clamping device; 170. Machining tool head; 20. Second positioning device. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0029] Combination Figures 1 to 6As shown, according to a specific embodiment of this application, a valve sleeve micro-hole processing device is provided.

[0030] Specifically, such as Figure 1 , Figure 2 As shown, the valve sleeve micro-hole processing equipment includes a support base 2, a positioning device, a detection device, and a control device. The support base 2 is sleeved on the base shaft 1. The positioning device is set on the support base 2 and has multiple positioning structures that match the workpiece to be processed. The positioning structures are used at least to support and position the workpiece to be processed. The detection device is set close to the workpiece to be processed and is used at least to record the position of the workpiece to be processed. The control device is electrically connected to the detection device, the base shaft 1, and the positioning device and is used at least to adjust and fix the position of the workpiece to be processed.

[0031] Applying the technical solution of this embodiment, after the positioning device positions the workpiece, the detection device records the position coordinates of the workpiece. After the current workpiece is processed, the workpiece is replaced. At this time, the control device can calculate the deviation of the current workpiece relative to the positioning device based on the coordinate system of the previous workpiece recorded by the detection device. Then, the control device controls the base shaft 1 to rotate or move, thereby driving the bearing base 2 and the positioning device to perform position compensation adjustment on the workpiece, ensuring that the position of the workpiece is aligned, so as to facilitate the processing of the replaced workpiece.

[0032] In this embodiment, as Figure 1 As shown, the base shaft 1 is a cylindrical shaft. The base shaft 1 can rotate to drive the supporting base 2 to rotate as well. Simultaneously, the base shaft 1 can move in any direction along the horizontal plane, thereby moving the supporting base 2 as well. Thus, the positioning device located on the supporting base, and the workpiece supported by the positioning device, have the freedom of movement in the horizontal plane and the freedom of rotation about the base shaft 1. The control device can then adjust the state of the workpiece in these three degrees of freedom by adjusting the base shaft 1. Through the translation of the base shaft 1, the relative position of the workpiece can be precisely adjusted, thereby ensuring the accuracy of micro-hole machining, improving the positional and angular control precision of micro-hole machining, and reducing machining errors.

[0033] Specifically, such as Figure 1 , Figure 3 , Figure 5 As shown, the valve sleeve micro-hole machining equipment also includes a tool clamping device 17, which is electrically connected to a control device. A machining head 170 is mounted on the tool clamping device 17, and the machining head 170 is used for machining the workpiece. The tool clamping device 17 can clamp and stabilize the machining head 170. The tool clamping device 17 is electrically connected to the control device, and can be controlled via electrical control or numerical control to ensure precise position and direction control of the machining head during the machining process of the workpiece.

[0034] Further, the workpiece to be processed is a valve sleeve 16, which has a first feature hole 161, a second feature hole 162, and a third feature hole 163, wherein the positioning structure is used to position at least one of the first feature hole 161 and the second feature hole 162. Figure 1 , Figure 2 As shown, the first feature hole 161 is the center hole of the valve sleeve 16, and the second feature hole 162 is the side control of the valve sleeve 16. The positioning structure can restrict the position of the valve sleeve 16 by positioning the first feature hole 161, and the positioning mechanism can restrict the rotational freedom of the valve sleeve 16 by positioning the second feature hole 162.

[0035] In one embodiment of this application, the machining head 170 is an electrode wire chuck, which is used to machine the oil inlet holes of the second feature hole 162 and the third feature hole 163. By vertically moving the electrode wire chuck, the micro-hole machining of the valve sleeve 16 is achieved, which improves the accuracy and efficiency of micro-hole machining and enables the micro-hole machining to be completed quickly and accurately.

[0036] Furthermore, the detection device includes an image sensor, which is positioned above at least one of the workpiece and the tool clamping device 17. The image sensor is used to detect the positional and angular deviations of the workpiece. A control device is connected to the base shaft 1 and the image sensor, and is used to control the base shaft 1 to move the bearing base 2. The image sensor can capture the position of the feature holes on the valve sleeve 16 with high precision. Through image analysis technology, it calculates the deviation between the actual hole position and the theoretical design position, including the positional deviation (i.e., the offset of the hole position in the two-dimensional plane) and the angular deviation (i.e., the angular difference between the hole axis and the theoretical axis).

[0037] It should be noted that the data captured by the imager is transmitted to the control device. The control device analyzes the specific deviation value based on the data fed back by the imager, providing a basis for subsequent compensation control. The control device can automatically adjust the movement of the base shaft 1 based on the measurement results of the positional deviation and angular deviation, thereby driving the movement of the entire bearing base 2, realizing the precise adjustment of the position of the tool clamping device 17 relative to the valve sleeve 16. This allows the device to perform personalized compensation for the specific deviation of each valve sleeve 16, ensuring that the position and angle of the machined microhole meet the design requirements.

[0038] Furthermore, such as Figure 1 , Figure 3 , Figure 5As shown, there are two positioning devices, positioned at a distance from each other. One positioning device, closer to the tool clamping device 17, is used to clamp and position the valve sleeve 16, while the other positioning device is used to move and position the valve sleeve 16. The positioning device closer to the tool clamping device 17 achieves positioning by positioning the first feature hole 161 (the central hole of the valve sleeve 16). By cooperating with the first feature hole 161, the positioning device restricts the valve sleeve 16's degrees of freedom except for vertical movement and rotation around the center. The other positioning device adjusts the position of the valve sleeve 16 during machining to ensure that the tool clamping device 17 can accurately align with the machining point of the second feature hole 162 (side countersunk hole) or the third feature hole 163 (oil outlet countersunk hole) for micro-hole machining.

[0039] In this embodiment, the two positioning devices work together to achieve stable clamping of the valve sleeve 16 before processing and precise position adjustment during processing. This ensures that the machining head 170 can enter the second feature hole 162 and the third feature hole 163 along the correct path and at an appropriate depth and angle during electrical discharge machining, thus machining the oil inlet and outlet holes that meet the design requirements. This step-by-step positioning method, through a flexible adjustment mechanism and a multi-axis control system, achieves high-precision micro-hole machining, improving the manufacturing quality and performance of the valve sleeve 16.

[0040] Specifically, such as Figure 1 As shown, the positioning device includes a first positioning device 10, which includes a first positioning seat 12 and a first positioning structure 13. The first positioning seat 12 extends along a first preset direction and is rotatably mounted on the bearing base 2. One end of the first positioning structure 13 is connected to the first positioning seat 12, and the other end of the first positioning structure 13 protrudes from the first positioning seat 12 and forms a mating structure that cooperates with the first feature hole 161. The first positioning structure 13 has a bearing state that is connected to the first feature hole 161 and an unloading state that is separated from the first feature hole 161. When the first positioning structure 13 is in the bearing state, the first positioning seat 12 can drive the valve sleeve 16 to rotate. The first positioning seat 12 is rotatably mounted on the bearing base 2, thereby adjusting the position of the valve sleeve 16 to ensure that the electrode wire can enter the target hole at the correct angle. The first positioning structure 13 can be tightly fitted with the first feature hole 161 of the valve sleeve 16, thereby restricting the valve sleeve 16's freedom of movement except for vertical movement and rotation around the center, and providing support and positioning for the valve sleeve 16. When the first positioning structure 13 is in the bearing state, the first positioning structure 13 is tightly fitted with the first feature hole 161 to form a hole-shaft fit, providing positioning support for the valve sleeve 16. When it is necessary to remove the valve sleeve 16 from the equipment or install a new valve sleeve 16 to be processed, the first positioning structure 13 will separate from the first feature hole 161 and be in the unloading state.

[0041] It should be noted that the first preset direction is the vertical height direction of the valve sleeve micro-hole processing equipment and the workpiece to be processed. The first positioning seat 12 cooperates with the first feature hole 161 of the valve sleeve 16 through the first positioning structure 13 along the first preset direction, and supports the valve sleeve 16, so that the valve sleeve 16 is kept in a vertical state to be processed.

[0042] Furthermore, such as Figure 1 , Figure 2 As shown, the first positioning device 10 also includes a clamping structure 14. The first end of the clamping structure 14 is connected to the first positioning seat 12, and the second end of the clamping structure 14 is provided with an adjusting member 15. The adjusting member 15 has a clamping state that controls the clamping structure 14 to abut against the valve sleeve 16, and a releasing state that controls the clamping structure 14 to separate from the valve sleeve 16. The clamping structure 14 provides further safety assurance after positioning the valve sleeve 16, ensuring the stability and accuracy of the valve sleeve 16 during processing. When the adjusting member 15 is in the clamping state, it is activated or adjusted to a specific position, causing the clamping structure 14 to contact the valve sleeve 16 and apply sufficient clamping force to prevent any unnecessary movement or rotation of the valve sleeve during processing, ensuring processing accuracy and safety. When the adjusting member 15 is in the releasing state, the clamping structure 14 separates from the valve sleeve 16, and no longer applies clamping force, thus facilitating the loading and unloading of the valve sleeve 16.

[0043] In this embodiment, after the valve sleeve 16 is engaged with the first positioning seat 12 by the first positioning structure 13, the operator or the automation system will activate the adjusting component 15 to put it into a clamping state, thereby pushing or forcing the clamping structure 14 to fit tightly against the outer surface of the valve sleeve 16, forming a firm fixation. With this setting, even if a large clamping force or cutting force is introduced when the electrode wire chuck performs electrical discharge machining, the valve sleeve 16 can remain stable and ensure that the position and angle deviation of the machined microhole is within a controllable range, achieving a high-precision machining effect.

[0044] It should be noted that the clamping structure 14 is a structure that can adapt to the shape of the outer surface of the valve sleeve 16, such as using elastic elements or grippers with deformable designs, to ensure that a uniform and reliable clamping force can be provided under different valve sleeve 16 sizes; the adjusting member 15 is a mechanical or electronic component (e.g., screw, lever, or cylinder / hydraulic cylinder system) that can control the opening or closing of the clamping structure 14. The adjusting member 15 controls the clamping or releasing action of the clamping structure 14 by changing its own state (e.g., tightening the screw or energizing the cylinder).

[0045] Furthermore, such as Figure 1As shown, the positioning device also includes a second positioning device 20, which includes a second positioning seat 3, a guide bracket 4, and a second positioning structure 5. The second positioning seat 3 is disposed at a distance from the first positioning seat 12 and extends along a first preset direction. The guide bracket 4 is movably disposed on the second positioning seat 3. One end of the second positioning structure 5 is connected to the guide bracket 4, and the other end of the second positioning structure 5 is provided with a mating structure that cooperates with the second feature hole 162. The second positioning structure 5 has a positioning state that is connected to the second feature hole 162 and a separation state that is separated from the second feature hole 162. The guide bracket 4 can drive the second positioning structure 5 to move to adjust the relative angle and height between the second positioning structure 5 and the second feature hole 162. The guide bracket 4 is movably mounted on the second positioning seat 3, possessing the ability to move in multiple directions and the flexibility to adjust the tilt angle within a certain range. The second positioning structure 5 is equipped with a structure that mates with the second feature hole 162. The guide bracket 4, located on the second positioning seat 3, can precisely position the second positioning structure 5 relative to the second feature hole 162, thereby restricting the rotational freedom of the valve sleeve 16 on the first positioning structure 13. This ensures that the electrode wire can accurately align with the machining opening during processing, enabling efficient and precise electrical discharge machining. Through the coordinated operation of the second positioning device 20 and the first positioning device 10, the movement of the valve sleeve 16 in six degrees of freedom—translational motion in three directions in three-dimensional space and rotational motion around these three axes—is restricted. This dual positioning strategy ensures the absolute stability of the valve sleeve 16 during processing, enabling high-precision machining of the oil outlet and inlet holes, thus improving product quality and performance.

[0046] It should be noted that the movable characteristic of the guide bracket 4 is based on the deviation data provided by the imager. The guide bracket 4 is moved in the horizontal plane by the control device and its angle is adjusted by the rocker arm system to ensure that the second positioning structure 5 can be accurately aligned with the center of the second feature hole 162.

[0047] Specifically, the second positioning device 20 also includes an elastic element. One end of the elastic element is connected to the second positioning structure 5, and the other end is connected to the guide bracket 4. When the valve sleeve 16 rotates about the axis of the first positioning seat 12, the elastic element pushes the second positioning structure 5 to identify the second feature hole 162 and switch to the positioning state. When the valve sleeve 16 rotates about the axis of the first positioning seat 12, the elastic element pushes the second positioning structure 5 to identify the position of the second feature hole 162 through its own elastic force. When the valve sleeve 16 rotates to a specific angle, that is, when the second feature hole 162 is aligned with the second positioning structure 5, the elastic element drives the contact of the second positioning structure 5 to extend forward until the contact is tangent to the conical surface of the second feature hole 162. At this instant, the second positioning structure 5 automatically switches to the positioning state, effectively limiting the further rotation of the valve sleeve 16 about the central axis and ensuring the precise position of the second feature hole 162 is fixed.

[0048] It should be noted that the elastic element, by continuously applying a constant thrust, ensures that the second positioning structure 5 can actively seek and contact the second feature hole 162. Once the contact of the second positioning structure 5 finds the second feature hole 162 of the valve sleeve 16, the elastic force of the elastic element is converted into contact pressure between the positioning contact and the second feature hole 162, thereby stabilizing the second positioning structure 5 in the positioning state, accurately restricting the rotation of the valve sleeve 16, and thus determining the position of the valve sleeve 16. When positioning of the second feature hole 162 of the valve sleeve 16 is not required, the operator or the automated control system can adjust the position of the guide bracket 4 to separate the second positioning structure 5 from the second feature hole 162, switching to the separated state. At this time, the elastic element no longer pushes the second positioning structure 5, allowing the valve sleeve 16 to be loaded, unloaded, or processed at other angles.

[0049] Furthermore, the second positioning device 20 also includes a stop plate 11, which is disposed on the side of the second positioning seat 3 away from the second positioning structure 5. The stop plate 11 has a stepped structure, which is used to engage with the guide bracket 4 to control the second positioning structure 5 to switch to the separated state. When the valve sleeve 16 has completed the machining of the oil outlet hole and needs to be adjusted to machine the oil inlet hole, the operator first moves the guide bracket 4 to the position where it engages with the stepped structure of the stop plate 11. By adjusting the guide bracket 4, the second positioning structure 5 is separated from the second feature hole 162 of the valve sleeve 16, entering the separated state. At this time, the second positioning structure 5 no longer participates in the positioning of the valve sleeve 16, allowing the valve sleeve 16 to be adjusted in angle or installed / removed. The engagement of the stepped structure of the stop plate 11 with the guide bracket 4 controls the separation action of the second positioning structure 5, avoiding positioning errors or equipment damage caused by improper operation during the adjustment process, and ensuring the safety and stability of the machining process.

[0050] This application also provides a preferred embodiment of a valve sleeve micro-hole processing equipment for electro-discharge micro-hole processing of automotive fuel injector valve sleeves.

[0051] Specifically, such as Figure 1 , Figure 2 As shown, the valve sleeve micro-hole processing equipment includes a base shaft 1, which is a cylindrical shaft with a horizontal axis. Under the control of two translational motion axes, the axial X-axis and the radial Y-axis, it can freely translate in the horizontal plane. The base shaft 1 can carry the entire equipment to translate in the horizontal plane, which is used to adjust the relative position of the electrode wire and the processing position of the valve sleeve 16 in the horizontal direction.

[0052] The bearing base 2 is mounted on the base shaft 1 and rotates around the base shaft 1 under the control of the control device. The bearing base 2 is used to support other parts of the equipment and can carry other parts to rotate around the base shaft 1 together, so that the equipment can also process the oil inlet and oil outlet holes of the valve sleeve 16 (the micro-hole centers of the oil inlet and oil outlet holes are perpendicular and 90° apart).

[0053] The second positioning seat 3 is a three-stage cylinder, the lower part of which forms a hole-shaft fit with the bearing base 2, and its shoulder surface is close to the end face of the bearing base 2. It is fixed to the bearing base 2 by screws. The guide bracket is a cuboid, and its central hole forms a fit with the upper cylinder of the second positioning seat 3. It can rotate around the second positioning seat 3 and can move axially relative to the second positioning seat 3. The guide bracket 4 is used to adjust the height and direction of the second positioning structure 5 so that the second positioning structure 5 can point to the second feature hole 162 of the valve sleeve 16. After the ball head telescopic device on the second positioning structure 5 is adjusted to a suitable height and direction, the relative position of the guide bracket 4 and the second positioning seat 3 is fixed by bolts.

[0054] The second positioning structure 5 includes a guide head, a guide pin, and a spring seat. The guide head is fixed to the guide bracket 4 by bolts. The cylindrical hole of the guide head and the guide pin form a clearance fit H6 / g5, allowing the guide head and the guide pin to slide relative to each other. The guide pin is a rotating body, and its head is equipped with a ball-head telescopic device for tangential engagement with the outer conical surface of the second feature hole 162. The diameter of the middle part of the guide pin is larger than the diameter of the holes in the guide heads and spring seats on both sides, so that the travel of the guide pin is between the guide head and the spring seat. A space is provided between the guide pin and the spring seat. The valve sleeve 16 has an elastic element. Under the elastic force of the elastic element, the guide pin can be pushed to press against the end face of the guide head. When positioning the valve sleeve 16 with the second feature hole 162, the ball head of the guide head presses against the outer circular surface of the valve sleeve 16. At this time, there is pressure between the guide pin spring seat and the guide head, and between the ball head and the outer circular surface of the valve sleeve 16. When the valve sleeve 16 rotates around the central axis of the first positioning seat 12 until the second feature hole 162 faces the ball head, the guide pin slides further under the action of elastic force until the ball head is tangent to the conical surface on the side of the valve sleeve 16, thus achieving circumferential positioning of the valve sleeve 16. The guide pin is fixed to the guide bracket 4 by bolts. The spring seat has a countersunk hole for fixing the position and direction of the elastic element. The end face of the spring seat is used to restrict the movement of the guide pin. The other side of the spring seat is a square groove, which forms a sliding pair with the guide bracket 4. When the guide pin slides relative to the guide head, the guide bracket 4 slides in the square groove of the spring seat at the same time.

[0055] The stop plate is fixed to the second positioning seat 3 by bolts. It is used to limit the position of the guide pin when the valve sleeve 16 is machined with micro holes, so that the ball head no longer contacts the outer circle of the valve sleeve 16, thus avoiding interference with the machining process of the valve sleeve 16.

[0056] The first positioning seat 12 is mounted on the bearing base 2 and can rotate around the center relative to the bearing base 2. The rotation of the first positioning seat 12 allows the equipment to switch between different working modes. The first positioning structure 13 is a two-stage cylinder. The larger diameter part of the first positioning structure 13 forms a hole-shaft fit with the first positioning seat 12, and its axial position relative to the first positioning seat 12 can be adjusted. Then, the relative position of the two is fixed by screws. The smaller diameter part of the first positioning structure 13 forms a hole-shaft fit with the valve sleeve 16 for positioning the valve sleeve 16.

[0057] The clamping structure 14 is fixed to the first positioning seat 12 by bolts, and a threaded hole is provided on the side of the valve sleeve 16. Together with the adjusting component 15, it clamps the valve sleeve 16 after positioning. The electrode wire chuck is used to hold the electrode wire to perform electrical discharge machining on the valve sleeve 16. Under the control of the electrode wire chuck tool holding device 17, it can move up and down in the vertical direction.

[0058] To achieve the machining and positional control of the oil inlet (second feature hole 162) and oil outlet (third feature hole 163) of the valve sleeve 16, the valve sleeve micro-hole machining equipment has three working modes: loading and unloading mode, oil outlet machining mode, and oil inlet machining mode.

[0059] Loading and unloading modes: such as Figure 1 , Figure 2 As shown, after adjusting the base shaft 1, the valve sleeve 16 is installed on the first positioning structure 13, with the large outer diameter end face of the valve sleeve 16 facing vertically upwards. At this time, the axial direction of the second positioning structure 5 is horizontal. In order not to interfere with tightening or loosening the adjusting member 15, the first positioning seat 12 is adjusted so that the adjusting member 15 and the second positioning structure 5 are located on both sides of the valve sleeve 16. When machining valve sleeves 16 of different specifications for the first time, it is also necessary to adjust the axial relative position between the first positioning structure 13 and the first positioning seat 12, and the axial position and angle of the guide bracket 4 relative to the second positioning seat 3, so that the second positioning structure 5 points exactly to the second feature hole 162 of the valve sleeve 16. When the equipment is in this mode, the operator can loosen the adjusting component 15 to remove the processed valve sleeve 16, align the first feature hole 161 of the new valve sleeve 16 blank with the first positioning structure 13, move the valve sleeve 16 downward until the end face of the valve sleeve 16 is close to the shaft end face of the first positioning structure 13, and then lift the guide bracket 4 to disengage the guide bracket 4 from the stop plate 11. Under the elastic force of the elastic element, the guide pin ball head of the second positioning structure 5 approaches the small outer circular surface of the valve sleeve 16, and rotates the valve sleeve 16 around the central axis until the ball head of the second positioning structure 5 is tangent to the outer conical surface of the second feature hole 162 of the valve sleeve 16. At this time, tighten the adjusting component 15 to clamp the valve sleeve blank.

[0060] Oil outlet hole machining mode: such as Figure 3 , Figure 4 As shown, the process transitions from loading / unloading mode to oil outlet hole machining mode. The guide bracket 4 is engaged with the stepped structure of the stop plate 11, ensuring the second positioning structure 5 is no longer in contact with the valve sleeve 16. Then, the first positioning seat 12 is rotated 180° so that the openings of the third feature hole 163 and the second feature hole 162 are unobstructed. In this mode, the base shaft 1 is adjusted so that the third feature hole 163 of the valve sleeve 16 is directly below the electrode wire chuck. The position and angle of the valve sleeve 16 are recorded by a detection device. The electrode wire chuck is then controlled to move downwards via a control device, machining an oil outlet hole between the bottom of the oil outlet countersunk hole (third feature hole 163) and the bottom of the first feature hole 161 of the valve sleeve 16. Finally, to avoid interfering with subsequent equipment movements, the electrode wire chuck is controlled to move upwards via a control device.

[0061] Machining oil inlet hole mode: such as Figure 5 , Figure 6As shown, the process is switched from machining the oil outlet hole mode to machining the oil inlet hole mode. The base shaft 1 is rotated 90° to make the center of the second feature hole 162 vertical and the opening facing upward. In this mode, an oil inlet hole is machined between the bottom of the second feature hole 162 and the wall of the first feature hole 161 of the valve sleeve 16. The position and angle of the valve sleeve 16 are recorded during machining. Finally, in order not to interfere with the subsequent movement of the equipment, the electrode wire chuck is moved upward by the control device.

[0062] The method for controlling the position of the oil inlet and outlet ports of the control valve sleeve 16 is shown below:

[0063] First, a valve sleeve 16 is machined as a test piece. During the machining process, the position and angle of the valve sleeve are recorded. The valve sleeve test piece is placed with the opening of the third feature hole 163 facing upwards under the lens of the detection device. A horizontal axis coordinate system is established with the direction of the second feature hole 162 as a reference. The position and angle deviations of the oil outlet of the valve sleeve 16 relative to the third feature hole 163 in both directions are measured. Then, when machining the final valve sleeve, the horizontal axis coordinate is compensated based on the recorded position and the deviations in both directions, so that the oil outlet of the subsequent machining is closer to the center of the third feature hole 163 and the position deviation is smaller. At the same time, the compensation base shaft 1 is adjusted to correct the angle deviation. When machining the oil inlet, a coordinate system is established with the axial direction from the large outer circle to the small outer circle of the valve sleeve 16 as a reference. The position and angle deviations in both directions are measured. Then, the X-axis and Y-axis are adjusted to correct the position deviation, and the base shaft 1 and the first positioning seat 12 are adjusted to correct the angle deviation.

[0064] As can be seen from the above description, the valve sleeve micro-hole processing equipment in this embodiment has the following beneficial effects:

[0065] 1) The first positioning structure 13 and the second positioning structure 5 can simultaneously position the first feature hole 161 and the second feature hole 162 of the valve sleeve.

[0066] 2) The rotating motion shaft can be used to process both the oil inlet and outlet holes of valve sleeve 16, and the loading / unloading or processing modes can be switched.

[0067] 3) The detection and control devices detect and adjust positional and angular deviations. Through two translational and two rotary motion axes, they compensate and control the machining position and angle of the oil inlet and outlet holes of the valve sleeve components.

[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A valve sleeve micro-hole processing device, characterized in that, include: A bearing base (2) is sleeved on a base shaft (1); A positioning device is provided on the bearing base (2), and the positioning device is provided with a plurality of positioning structures that match the workpiece to be processed. The positioning structures are at least used to support and position the workpiece to be processed. A detection device is positioned close to the workpiece to be processed, and the detection device is at least used to record the position of the workpiece to be processed. A control device is electrically connected to the detection device, the base shaft (1), and the positioning device. The control device is at least used to adjust and fix the position of the workpiece to be processed. The positioning device includes a first positioning device (10), which comprises: The first positioning seat (12) extends along a first preset direction and is rotatably mounted on the bearing base (2); The first positioning structure (13) has one end connected to the first positioning seat (12) and the other end of the first positioning structure (13) protruding from the first positioning seat (12) and forming a mating structure that cooperates with the first feature hole (161). The first positioning device (10) further includes a clamping structure (14), the first end of which is connected to the first positioning seat (12), and the second end of which is provided with an adjusting member (15). The positioning device further includes a second positioning device (20), which includes: The second positioning seat (3) is disposed at a distance from the first positioning seat (12), and the second positioning seat (3) extends along the first preset direction; Guide bracket (4), which is movably mounted on the second positioning seat (3); The second positioning structure (5) has one end connected to the guide bracket (4) and the other end of the second positioning structure (5) is provided with a mating structure that cooperates with the second feature hole (162).

2. The valve sleeve micro-hole processing equipment according to claim 1, characterized in that, The valve sleeve micro-hole processing equipment further includes: a tool clamping device (17), which is electrically connected to the control device. The tool clamping device (17) is provided with a processing head (170), which is used to process the workpiece.

3. The valve sleeve micro-hole processing equipment according to claim 2, characterized in that, The workpiece to be processed is a valve sleeve (16), which has a first feature hole (161), a second feature hole (162) and a third feature hole (163). The positioning structure is used to position at least one of the first feature hole (161) and the second feature hole (162).

4. The valve sleeve micro-hole processing equipment according to claim 2, characterized in that, The detection device includes an imager, which is positioned above at least one of the workpiece to be processed and the tool clamping device (17). The imager is used to detect the positional deviation and angular deviation of the workpiece to be processed. The control device is connected to the base shaft (1) and the imager. The control device is used to control the base shaft (1) to drive the bearing base (2) to move.

5. The valve sleeve micro-hole processing equipment according to claim 3, characterized in that, There are two positioning devices, which are arranged at a distance from each other. One positioning device, which is closer to the tool clamping device (17), is used to clamp and position the valve sleeve (16), and the other positioning device is used to move and position the valve sleeve (16).

6. The valve sleeve micro-hole processing equipment according to claim 5, characterized in that, The first positioning structure (13) has a bearing state that is connected to the first feature hole (161) and an unloading state that is separated from the first feature hole (161). When the first positioning structure (13) is in the bearing state, the first positioning seat (12) can drive the valve sleeve (16) to rotate.

7. The valve sleeve micro-hole processing equipment according to claim 6, characterized in that, The adjusting member (15) has a clamping state that controls the clamping structure (14) to abut against the valve sleeve (16), and the adjusting member (15) has a releasing state that controls the clamping structure (14) to separate from the valve sleeve (16).

8. The valve sleeve micro-hole processing equipment according to claim 6, characterized in that, The second positioning structure (5) has a positioning state that is connected to the second feature hole (162), and the second positioning structure (5) has a separation state that is separated from the second feature hole (162); The guide bracket (4) can drive the second positioning structure (5) to move, so as to adjust the relative angle and height between the second positioning structure (5) and the second feature hole (162).

9. The valve sleeve micro-hole processing equipment according to claim 8, characterized in that, The second positioning device (20) further includes an elastic element. One end of the elastic element is connected to the second positioning structure (5), and the other end of the elastic element is connected to the guide bracket (4). When the valve sleeve (16) rotates about the axis of the first positioning seat (12), the elastic element is used to push the second positioning structure (5) to identify the second feature hole (162) and switch to the positioning state.

10. The valve sleeve micro-hole processing equipment according to claim 8, characterized in that, The second positioning device (20) further includes a stop plate (11), which is disposed on the side of the second positioning seat (3) away from the second positioning structure (5). The stop plate (11) is provided with a step structure, which is used to engage with the guide bracket (4) to control the second positioning structure (5) to switch to the separation state.

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