Valve sleeve micropore machining equipment

Abstract

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

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a valve sleeve micro-hole processing device. Background Art

[0002] When machining the valve sleeve's oil outlet hole, the wire electrode needs to be inserted into the bottom of the approximately 0.5mm diameter oil outlet countersunk hole for EDM machining. If the positional deviation of the oil outlet hole relative to the oil outlet countersunk hole is too large, meaning the wire electrode deviates too far from the center of the oil outlet countersunk hole, unintended discharges will occur between the wire electrode and the oil outlet countersunk hole opening or wall, causing the wire electrode diameter to vary. This leads to unstable and out-of-tolerance oil outlet hole diameter and flow rate during continuous machining. Therefore, controlling the positional accuracy of the valve sleeve's oil outlet hole is crucial. When machining the valve sleeve's oil inlet hole, the wire electrode needs to be inserted into the bottom of the side countersunk hole for EDM machining. On the other side of the oil inlet hole is the cylindrical surface of the valve sleeve's center hole. If the positional deviation of the oil inlet hole relative to the side countersunk hole is too large, the shape of the oil inlet hole outlet will be affected, causing high-pressure oil to flow eccentrically into the injector control chamber, thereby affecting the movement of the needle valve. Therefore, the positional accuracy of the valve sleeve's oil inlet hole should also be appropriately controlled.

[0003] Currently, no effective solutions have been proposed for the above technical problems. Summary of the Invention

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

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a valve sleeve micro-hole processing equipment is provided, including: a bearing base, the bearing base is sleeved on the base shaft; a positioning device, the positioning device is arranged on the bearing base, and the positioning device is provided with a plurality of positioning structures matching the workpiece to be processed, and the positioning structures are at least used to support and position the workpiece to be processed; a detection device, the detection device is arranged 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, the control device is electrically connected to the detection device, the base shaft, and the positioning device, and the control device is at least used to adjust and fix the position of the workpiece to be processed.

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

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

[0008] Furthermore, the detection device includes an imager, which is arranged above at least one of the workpiece to be processed and the tool clamping device, and is used to detect the position deviation and angular deviation of the workpiece to be processed; the control device is connected to the base shaft and the imager, and the control device is used to control the base shaft to drive the supporting base to move.

[0009] Furthermore, there are two positioning devices, which are arranged at a distance from each other, wherein one positioning device close 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, and the first positioning device includes: a first positioning seat, the first positioning seat is extended along a first preset direction, and the first positioning seat is rotatably arranged on the bearing base; a first positioning structure, one end of the first positioning structure is connected to the first positioning seat, and the other end of the first positioning structure protrudes from the first positioning seat and forms a matching structure that matches the first characteristic hole; wherein the first positioning structure has a bearing state in which it is matched with the first characteristic hole, and the first positioning structure has an unloading state separated from the first characteristic hole. 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 the clamping structure is connected to the first positioning seat, and the second end of the clamping structure is provided with an adjusting member, the adjusting member has a clamping state for controlling the abutment between the clamping structure and the valve sleeve, and the adjusting member has a release state for controlling the separation of the clamping structure from the valve sleeve.

[0012] Furthermore, the positioning device also includes a second positioning device, which includes: a second positioning seat, which is arranged at a distance from the first positioning seat and extends along the first preset direction; a guide bracket, which is movably arranged on the second positioning seat; a second positioning structure, one end of the second positioning structure is connected to the guide bracket, and the other end of the second positioning structure is provided with a matching structure that matches the second characteristic hole, and the second positioning structure has a positioning state in which it is matched with the second characteristic hole, and the second positioning structure has a separated state separated from the second characteristic hole; wherein the guide bracket can drive the second positioning structure to move to adjust the relative angle and height of the second positioning structure and the second characteristic hole.

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

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

[0015] By applying the technical solution of the present invention, after the positioning device positions the workpiece to be processed, the position coordinates of the workpiece to be processed are recorded by the detection device. After the processing of the current workpiece to be processed is completed, the workpiece to be processed is replaced. At this time, the control device can calculate the deviation of the current workpiece to be processed relative to the positioning device based on the coordinate system of the previous workpiece to be processed recorded by the detection device. Then the control device controls the rotation or movement of the base shaft, thereby driving the supporting base and the positioning device to perform position compensation adjustment on the workpiece to be processed, ensuring that the position of the workpiece to be processed is aligned, so as to facilitate the processing of the replaced workpiece to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It shows a structural schematic diagram of a first embodiment of a valve sleeve micro-hole machining device according to the present invention;

[0018] Figure 2 It shows a structural schematic diagram of a second embodiment of a valve sleeve micro-hole machining device according to the present invention;

[0019] Figure 3 It shows a structural schematic diagram of a third embodiment of a valve sleeve micro-hole machining device according to the present invention;

[0020] Figure 4 It shows a schematic structural diagram of a fourth embodiment of a valve sleeve micro-hole machining device according to the present invention;

[0021] Figure 5 It shows a structural schematic diagram of a fifth embodiment of a valve sleeve micro-hole machining device according to the present invention;

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

[0023] The above drawings 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 member; 10. First positioning device; 11. Stop plate; 12. First positioning seat; 13. First positioning structure; 14. Clamping structure; 15. Adjusting member; 16. Valve sleeve; 161. First characteristic hole; 162. Second characteristic hole; 163. Third characteristic hole; 17. Tool holding device; 170. Processing tool head; 20. Second positioning device. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

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

[0030] Specifically, if Figure 1 、 Figure 2 As shown, the valve sleeve micro-hole processing equipment includes a bearing base 2, a positioning device, a detection device and a control device. The bearing base 2 is sleeved on the base shaft 1; the positioning device is arranged on the bearing base 2, and the positioning device is provided with multiple positioning structures matching the workpiece to be processed, and the positioning structures are at least used to support and position the workpiece to be processed; the detection device is arranged 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; the control device is electrically connected to the detection device, the base shaft 1, and the positioning device, and the control device is at least used to adjust and fix the position of the workpiece to be processed.

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

[0032] In this embodiment, if Figure 1 As shown, the base shaft 1 is a cylindrical shaft that can rotate to drive the supporting base 2 to rotate together. At the same time, the base shaft 1 can move in any direction along the horizontal plane, thereby driving the supporting base 2 to move together. The positioning device located on the supporting base and the positioning device have the freedom to move in the horizontal plane and the freedom to rotate about the base shaft 1 as the rotation axis. The control device can adjust the state of the workpiece in these three degrees of freedom by adjusting the base shaft 1. The relative position of the workpiece can be precisely adjusted by the translation of the base shaft 1, thereby ensuring the accuracy of micro-hole processing, improving the position and angle control accuracy of micro-hole processing, and reducing processing errors.

[0033] Specifically, if Figure 1 、 Figure 3 、 Figure 5 As shown, the valve sleeve micro-hole machining apparatus further includes a tool holder 17, which is electrically connected to a control device. A machining tool head 170 is mounted on the tool holder 17 and is used to perform machining operations on the workpiece. The tool holder 17 can hold and stabilize the machining tool head 170. The tool holder 17 is electrically connected to the control device and is controlled electronically or numerically to ensure precise positioning and orientation of the tool head during machining of the workpiece.

[0034] Furthermore, the workpiece to be processed is a valve sleeve 16, which has a first characteristic hole 161, a second characteristic hole 162 and a third characteristic hole 163, wherein the positioning structure is used to position at least one of the first characteristic hole 161 and the second characteristic hole 162. Figure 1 、 Figure 2 As shown, the first characteristic hole 161 is the central hole of the valve sleeve 16, and the second characteristic hole 162 is the side control of the valve sleeve 16. The positioning structure positions the first characteristic hole 161 to limit the position of the valve sleeve 16, and the positioning mechanism positions the second characteristic hole 162 to limit the rotational freedom of the valve sleeve 16 through the second characteristic hole 162.

[0035] In one embodiment of the present application, machining tool head 170 is a wire chuck, which is used to machine the oil inlet holes of second characteristic hole 162 and third characteristic hole 163. The vertical movement of the wire chuck enables micro-hole machining of valve sleeve 16, improving the precision and efficiency of micro-hole machining and enabling rapid and accurate completion of micro-hole machining.

[0036] Furthermore, the detection device includes an imager, positioned above at least one of the workpiece and the tool holder 17, for detecting positional and angular deviations of the workpiece. A control device is connected to the base shaft 1 and the imager, controlling the base shaft 1 to move the support base 2. The imager can accurately capture the position of the characteristic hole on the valve sleeve 16 and, through image analysis, calculate the deviation between the actual hole position and the theoretical design position, including positional deviation (i.e., the offset of the hole position on a two-dimensional plane) and 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 will be transmitted to the control device, which will analyze the specific deviation value based on the data fed back by the imager to provide 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 position deviation and angle deviation, thereby driving the movement of the entire bearing base 2, and realizing precise adjustment of the position of the tool clamping device 17 relative to the valve sleeve 16, so that the device can perform personalized compensation for the specific deviation of each valve sleeve 16, to ensure that the position and angle of the processed microholes meet the design requirements.

[0038] Furthermore, if Figure 1 、 Figure 3 、 Figure 5As shown, there are two positioning devices, which are spaced apart. One positioning device near the tool holder 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 near the tool holder 17 is achieved by positioning the first characteristic hole 161 (the hole in the valve sleeve 16). The positioning device cooperates with the first characteristic hole 161 to limit the freedom of the valve sleeve 16 except for vertical movement and rotation around the center. The other positioning device adjusts the position of the valve sleeve 16 during the machining process, ensuring that the tool holder 17 can accurately align with the machining point of the second characteristic hole 162 (side countersunk hole) or the third characteristic hole 163 (oil outlet countersunk hole) to perform 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, ensuring that the processing head 170 can enter the second characteristic hole 162 and the third characteristic hole 163 along the correct path, at an appropriate depth and angle during electrospark processing, and process oil inlet holes and oil outlet holes that meet design requirements. This step-by-step positioning method, through a flexible adjustment mechanism and a multi-axis control system, achieves high-precision micro-hole processing, thereby improving the manufacturing quality and performance of the valve sleeve 16.

[0040] Specifically, if Figure 1 As shown, the positioning device includes a first positioning device 10, and the first positioning device 10 includes a first positioning seat 12 and a first positioning structure 13. The first positioning seat 12 is extended along a first preset direction, and the first positioning seat 12 is rotatably set 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 matching structure that matches the first characteristic hole 161; wherein, the first positioning structure 13 has a load-bearing state in which it is matched with the first characteristic hole 161, and the first positioning structure 13 has an unloading state separated from the first characteristic hole 161. When the first positioning structure 13 is in the load-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 closely cooperate with the first characteristic hole 161 of the valve sleeve 16, thereby limiting the freedom of the valve sleeve 16 except for vertical movement and rotation around the center, and playing a supporting and positioning role for the valve sleeve 16. When the first positioning structure 13 is in the load-bearing state, the first positioning structure 13 closely cooperates with the first characteristic hole 161 to form a hole-axis fit, thereby providing support for the valve sleeve 16. When the valve sleeve 16 needs to be removed from the equipment or a new valve sleeve 16 to be processed needs to be installed, the first positioning structure 13 will separate from the first characteristic hole 161 and enter 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 characteristic 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 remains in a vertical state to be processed.

[0042] Furthermore, if Figure 1 、 Figure 2 As shown, the first positioning device 10 further includes a clamping structure 14, a first end of which is connected to the first positioning seat 12, and an adjusting member 15 is provided at the second end of the clamping structure 14. The adjusting member 15 has a clamping state in which the clamping structure 14 is in contact with the valve sleeve 16, and a releasing state in which the clamping structure 14 is separated from the valve sleeve 16. The clamping structure 14 provides a further safety guarantee after the valve sleeve 16 is positioned, ensuring the stability and accuracy of the valve sleeve 16 during the processing. When the adjusting member 15 is in the clamping state, the adjusting member 15 is activated or adjusted to a specific position, causing the clamping structure 14 to come into contact with the valve sleeve 16 and apply sufficient clamping force to prevent any unnecessary movement or rotation of the valve sleeve during the processing, thereby ensuring the accuracy and safety of the processing. When the adjusting member 15 is in the releasing state, the clamping structure 14 is separated from the valve sleeve 16 and no longer applies the clamping force, thereby facilitating the loading and unloading operations of the valve sleeve 16.

[0043] In this embodiment, when the valve sleeve 16 is engaged with the first positioning seat 12 through the first positioning structure 13, the operator or the automated system will activate the adjustment member 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 to form a firm fixation. With this arrangement, even if a large clamping force or cutting force is introduced during electrospark machining of the electrode wire chuck, the valve sleeve 16 can remain stable and motionless, ensuring that the position and angle deviation of the processed microholes are within a controllable range, thereby achieving a high-precision processing 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, for example, it uses an elastic element or a clamping claw with a deformable design 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 (such as a screw, a lever or a 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 (such as tightening the screw or energizing the cylinder).

[0045] Furthermore, if 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 arranged at a distance from the first positioning seat 12, and the second positioning seat 3 is extended along the first preset direction; the guide bracket 4 is movably arranged 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 matching structure that matches the second characteristic hole 162. The second positioning structure 5 has a positioning state in which it is matched with the second characteristic hole 162, and the second positioning structure 5 has a separated state in which it is separated from the second characteristic hole 162; wherein, the guide bracket 4 can drive the second positioning structure 5 to move to adjust the relative angle and height of the second positioning structure 5 and the second characteristic hole 162. The guide bracket 4 can be movably assembled on the second positioning seat 3, and has 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 provided with a structure that cooperates with the second characteristic hole 162. The guide bracket 4 can drive the second positioning structure 5 on the second positioning seat 3 to accurately locate its relative position with the second characteristic hole 162, thereby limiting the rotational freedom of the valve sleeve 16 on the first positioning structure 13, ensuring that the electrode wire can be accurately aligned with the processing opening during the processing, allowing efficient and accurate EDM. The second positioning device 20 works in conjunction with the first positioning device 10 to jointly limit the movement of the valve sleeve 16 in six degrees of freedom, namely, translational movement in three directions in three-dimensional space and rotational movement about these three axes. This dual positioning strategy ensures the absolute stability of the valve sleeve 16 during the processing process, thereby enabling high-precision processing of the oil outlet and oil inlet holes, improving the quality and performance of the product.

[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 control device controls the movement of the guide bracket 4 in the horizontal plane and adjusts its angle through the rocker system to ensure that the second positioning structure 5 can be accurately aligned with the center of the second characteristic hole 162.

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

[0048] It should be noted that the elastic member continuously applies a constant thrust, ensuring that the second positioning structure 5 can actively find and contact the second characteristic hole 162. Once the contact of the second positioning structure 5 finds the second characteristic hole 162 of the valve sleeve 16, the elastic force of the elastic member is converted into contact pressure between the positioning contact and the second characteristic hole 162, thereby stabilizing the second positioning structure 5 in the positioning state, accurately limiting the rotation of the valve sleeve 16, and further determining the position of the valve sleeve 16. When it is no longer necessary to position the second characteristic hole 162 of the valve sleeve 16, 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 characteristic hole 162 and switch it to the separated state. At this point, the elastic member no longer pushes the second positioning structure 5, allowing the valve sleeve 16 to be loaded and unloaded or processed at other angles.

[0049] Furthermore, the second positioning device 20 also includes a stopper 11, which is arranged on the side of the second positioning seat 3 away from the second positioning structure 5. The stopper 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 a separated state. When the valve sleeve 16 completes the processing of the oil outlet hole and needs to be adjusted to process the oil inlet hole, the operator first moves the guide bracket 4 to a position engaged with the step structure of the stopper 11. By adjusting the guide bracket 4, the second positioning structure 5 is separated from the second characteristic hole 162 of the valve sleeve 16 and enters a 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 perform angle adjustment or loading and unloading operations. The engagement of the step structure of the stopper 11 with the guide bracket 4 controls the separation action of the second positioning structure 5, avoids positioning errors or equipment damage caused by improper operation during the adjustment process, and ensures the safety and stability of the processing process.

[0050] The present application also provides a preferred embodiment of a valve sleeve micro-hole processing device, which is used for electrospark micro-hole processing of automobile injector valve sleeves.

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

[0052] The bearing base 2 is assembled 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 carry other parts of the equipment and can carry other parts to rotate around the base shaft 1, so that the equipment can take into account the processing of the oil inlet and oil outlet holes of the valve sleeve 16 (the centers of the micropores of the oil inlet and oil outlet holes are perpendicular and 90° apart).

[0053] The second positioning seat 3 is a three-level cylinder, the lower part of which forms a hole-axis fit with the bearing base 2, and its shoulder surface is close to the end face of the bearing base 2, and is fixed to the bearing base 2 by screws; the guide bracket is a rectangular parallelepiped, the center hole of which forms a fit with the upper cylinder of the second positioning seat 3, 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 characteristic hole 162 of the valve sleeve 16. After the ball head telescopic device on the second positioning structure 5 is adjusted to the appropriate height and direction, the relative positions of the guide bracket 4 and the second positioning seat 3 are 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 hole axis H6 / g5 clearance fit, and the guide head and the guide pin can slide relative to each other; the guide pin is a rotating body, and the guide pin head is provided with a ball head telescopic device for tangentially matching with the outer conical surface of the second characteristic hole 162. The diameter of the middle part of the guide pin is larger than the aperture of the guide heads and spring seats on both sides, so that the movement stroke of the guide pin is between the guide head and the spring seat, and a space is set between the guide pin and the spring seat. An elastic member, under the action of its elastic force, pushes the guide pin against the end face of the guide head. When the second characteristic hole 162 of the valve sleeve 16 is positioned, the ball head of the guide head abuts against the outer circumference of the valve sleeve 16. At this time, pressure is generated between the guide pin spring seat and the guide head, and between the ball head and the outer circumference of the valve sleeve 16. When the valve sleeve 16 rotates about the central axis of the first positioning seat 12 until the second characteristic hole 162 faces the ball head, the guide pin, under the action of the elastic force, slides further to a position where the ball head is tangent to the conical side surface 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 member. The end face of the spring seat is used to limit the movement of the guide pin. The other side of the spring seat has a square groove, forming a sliding pair with the guide bracket 4. When the guide pin slides relative to the guide head, the guide bracket 4 simultaneously slides within the square groove of the spring seat.

[0055] The stopper is fixed to the second positioning seat 3 by bolts, and is used to limit the position of the guide pin when the valve sleeve 16 is processed with microholes, so that its ball head no longer contacts the outer circle of the valve sleeve 16, thereby avoiding interference with the processing process of the valve sleeve 16.

[0056] The first positioning seat 12 is assembled 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 enables 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-axis fit with the first positioning seat 12, and the 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-axis fit with the valve sleeve 16, which is used to position the valve sleeve 16.

[0057] The clamping structure 14 is bolted to the first positioning seat 12 and has a threaded hole on the side of the valve sleeve 16. It works with the adjusting member 15 to clamp the positioned valve sleeve 16. The wire chuck is used to clamp the electrode wire for EDM machining of the valve sleeve 16. The wire chuck can move vertically under the control of the tool clamping device 17.

[0058] In order to realize the processing and position control of the oil inlet hole (second characteristic hole 162) and the oil outlet hole (third characteristic hole 163) of the valve sleeve 16, the valve sleeve micro-hole processing equipment has three working modes, namely, loading and unloading mode, oil outlet hole processing mode and oil inlet hole processing mode.

[0059] Loading and unloading mode: Figure 1 、 Figure 2 As shown, when adjusting the base shaft 1, after the valve sleeve 16 is installed on the first positioning structure 13, the large outer cylindrical end surface of the valve sleeve 16 is vertically upward, and the axial direction of the second positioning structure 5 is horizontal. To prevent interference 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 a valve sleeve 16 of a different specification 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 is precisely aligned with the second characteristic hole 162 of the valve sleeve 16. When the equipment is in this mode, the operator can loosen the adjusting part 15 to remove the processed valve sleeve 16, align the first characteristic 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 axial end face of the first positioning structure 13, and then lift the guide bracket 4 to make the guide bracket 4 separate from the stop plate 11. Under the elastic force of the elastic part of the second positioning structure 5, the ball head of the guide pin is close to the small outer cylindrical surface of the valve sleeve 16, and the valve sleeve 16 is rotated around the center axis until the ball head of the second positioning structure 5 is tangent to the outer conical surface of the second characteristic hole 162 of the valve sleeve 16. At this time, tighten the adjusting part 15 to clamp the valve sleeve blank.

[0060] Processing oil hole mode: Figure 3 、 Figure 4 As shown, the oil outlet processing mode is entered from the loading and unloading mode, and the guide bracket 4 is clamped on the step structure of the stop plate 11 so that the second positioning structure 5 and the valve sleeve 16 are no longer in contact. Then the first positioning seat 12 is rotated 180 degrees so that there is no obstruction in front of the openings of the third characteristic hole 163 and the second characteristic hole 162. When in this mode, the base shaft 1 is adjusted so that the third characteristic hole 163 of the valve sleeve 16 is just below the electrode wire chuck. The position and angle of the valve sleeve 16 at this time are recorded by the detection device, and the electrode wire chuck is controlled to move downward by the control device. The oil outlet hole is processed between the bottom of the oil outlet counterbore (third characteristic hole 163) of the valve sleeve 16 and the bottom of the first characteristic hole 161. Finally, in order to avoid interfering with the subsequent movement of the equipment, the electrode wire chuck is controlled to move upward by the control device.

[0061] Processing oil inlet hole mode: Figure 5 、 Figure 6As shown, the oil inlet hole machining mode is switched from the oil outlet hole machining mode to the oil inlet hole machining mode. The base shaft 1 is controlled to rotate 90°, aligning the center of the second characteristic hole 162 with the opening facing upward. In this mode, the oil inlet hole is machined between the bottom of the second characteristic hole 162 and the wall of the first characteristic hole 161 in the valve sleeve 16. The position and angle of the valve sleeve 16 during machining are recorded. Finally, to avoid interfering with subsequent machine movements, the control device controls the upward movement of the wire chuck.

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

[0063] First, a valve sleeve 16 is processed as a debugging part. During the processing, the position and angle of the valve sleeve are recorded. The third characteristic hole 163 of the valve sleeve debugging part is placed under the lens of the detection device with the opening facing upwards. A horizontal axis coordinate system is established with the direction of the second characteristic hole 162 as a reference. The position deviation and angle deviation of the oil outlet hole of the valve sleeve 16 relative to the third characteristic hole 163 of the valve sleeve 16 in two directions are measured respectively. Then, when processing the valve sleeve formal part, the horizontal axis coordinate is compensated by the deviation in two directions based on the recorded position of the horizontal axis coordinate, so that the oil outlet hole processed subsequently is closer to the center of the third characteristic hole 163 and the position deviation is smaller. At the same time, the compensation base axis 1 is adjusted to correct the angle deviation. When processing the oil inlet hole, 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 deviation and angle deviation in two directions are measured. Then, the X-axis and Y-axis are adjusted to correct the position deviation, and the base axis 1 and the first positioning seat 12 are adjusted to correct the angle deviation.

[0064] It can be seen from the above description that 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 characteristic hole 161 and the second characteristic hole 162 of the valve sleeve.

[0066] 2) The oil inlet and outlet holes of the valve sleeve 16 are processed by rotating the motion axis, and the loading and unloading or processing working mode is switched.

[0067] 3) The detection device and the control device detect and debug the position deviation and angle deviation, and compensate and control the processing position and angle of the oil inlet and outlet holes of the valve sleeve through two translational motion axes and two rotational motion axes.

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

[0069] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in 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 conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0070] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A valve sleeve micro-hole processing equipment, characterized in that: include: A bearing base (2), wherein the bearing base (2) is sleeved on the base shaft (1); A positioning device, the positioning device is arranged on the bearing base (2), and the positioning device is provided with a plurality of positioning structures matching the workpiece to be processed, and the positioning structures are at least used to support and position the workpiece to be processed; a detection device, the detection device being disposed near the workpiece to be processed and being 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, and the control device is at least used to adjust and fix the position of the workpiece to be processed.

2. The valve sleeve micro-hole processing equipment according to claim 1, characterized in that: The valve sleeve micro-hole processing equipment further comprises: a tool holding device (17), the tool holding device (17) being electrically connected to the control device, a processing tool head (170) being provided on the tool holding device (17), and the processing tool head (170) being used for processing the workpiece to be processed.

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), and the valve sleeve (16) has a first characteristic hole (161), a second characteristic hole (162), and a third characteristic hole (163), wherein the positioning structure is used to position at least one of the first characteristic hole (161) and the second characteristic 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 arranged above at least one of the workpiece to be processed and the tool clamping device (17), and is used to detect the position deviation and angular deviation of the workpiece to be processed; the control device is connected to the base shaft (1) and the imager, and 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 close 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 positioning device comprises a first positioning device (10), wherein the first positioning device (10) comprises: A first positioning seat (12), the first positioning seat (12) is extended along a first preset direction, and the first positioning seat (12) is rotatably arranged on the supporting base (2); a first positioning structure (13), one end of the first positioning structure (13) being connected to the first positioning seat (12), and the other end of the first positioning structure (13) being protruded from the first positioning seat (12) to form a matching structure matching the first characteristic hole (161); The first positioning structure (13) has a load-bearing state in which it is connected to the first characteristic hole (161), and the first positioning structure (13) has an unloading state in which it is separated from the first characteristic hole (161). When the first positioning structure (13) is in the load-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 first positioning device (10) further includes a clamping structure (14), a first end of the clamping structure (14) being connected to the first positioning seat (12), and a second end of the clamping structure (14) being provided with an adjusting member (15), the adjusting member (15) having a clamping state for controlling the abutment between the clamping structure (14) and the valve sleeve (16), and a releasing state for controlling the separation between the clamping structure (14) and the valve sleeve (16).

8. The valve sleeve micro-hole processing equipment according to claim 6, characterized in that: The positioning device further comprises a second positioning device (20), wherein the second positioning device (20) comprises: a second positioning seat (3), the second positioning seat (3) being arranged at a distance from the first positioning seat (12), and the second positioning seat (3) extending along the first preset direction; A guide bracket (4), the guide bracket (4) being movably arranged on the second positioning seat (3); a second positioning structure (5), one end of the second positioning structure (5) being connected to the guide bracket (4), the other end of the second positioning structure (5) being provided with a matching structure matching the second characteristic hole (162), the second positioning structure (5) having a positioning state in which it is matched and connected with the second characteristic hole (162), and a separation state in which the second positioning structure (5) is separated from the second characteristic 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 characteristic hole (162).

9. The valve sleeve micro-hole processing equipment according to claim 8, characterized in that: The second positioning device (20) further comprises an elastic member, one end of which is connected to the second positioning structure (5), and the other end of which is connected to the guide bracket (4). When the valve sleeve (16) rotates with the axis of the first positioning seat (12) as the rotation axis, the elastic member is used to push the second positioning structure (5) to identify the second characteristic 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 comprises a stopper (11), the stopper (11) being arranged on a side of the second positioning seat (3) away from the second positioning structure (5), the stopper (11) being provided with a step structure, the step structure being used for engaging with the guide bracket (4) to control the second positioning structure (5) to switch to the separated state.

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