Valve sleeve machining and clamping device

Abstract

The invention relates to the field of auxiliary equipment for workpiece machining, in particular to a clamping device for valve sleeve machining. The valve sleeve machining clamping device is used for solving the problems that an existing valve sleeve alignment mode is low in accuracy, and the quality of a valve sleeve is affected. The valve sleeve machining and clamping device comprises a seat body, a positioning and clamping structure used for clamping a valve sleeve is arranged on the seat body, the positioning and clamping structure comprises a through hole internally provided with an axial positioning structure, and when the valve sleeve is installed in the seat body, the conical surface of the valve sleeve protrudes out of the end face of the seat body. A directional hole and a positioning pin are further arranged on the seat body corresponding to the radial hole of the valve sleeve, the positioning pin can penetrate through the directional hole to be inserted into the radial hole of the valve sleeve so as to circumferentially position the valve sleeve, and a jacking structure capable of jacking the valve sleeve in the radial direction is further arranged on the seat body. The positioning pin can efficiently and accurately align the valve sleeve, and compared with a marking pin alignment mode, the alignment accuracy is improved, and the hole machining accuracy is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of auxiliary equipment for workpiece processing, and in particular to a valve sleeve processing clamping device. Background Art

[0002] The valve sleeve of the hydraulic control valve is a key component in the hydraulic control valve. It is usually installed with the valve core and the valve body to play the role of protection, guidance and sealing. The structure of the valve sleeve of the hydraulic control valve is usually as follows: Figure 1 As shown, a positioning hole for inserting the valve core is provided on it, an outer convex ring 14 is provided in the middle of the valve sleeve, and radial holes 13 are also provided along the radial direction of the valve sleeve. The valve sleeve is usually also provided with the following Figure 2 , Figure 3 The screw hole 112 shown in the figure and the fluid passage through which the fluid in the hydraulic system can pass. The fluid passage includes an oil hole 111 processed on one end face (first end face 11) of the valve sleeve and extending to the other end (second end face 12) of the valve sleeve, and a conical surface of the second end face 12 of the valve sleeve as shown in the figure. Figure 4 The conical hole 121 shown is connected to the oil hole 111.

[0003] Because the holes have a relative positional relationship, a clamping device is required during processing and the valve sleeve needs to be aligned to ensure the accuracy of the hole processing. In the past, a combination clamp V-block was usually used to clamp the valve sleeve during processing, and the alignment required marking. The marking method is not accurate, prone to position deviation, and easily causes quality problems, affecting production progress. Summary of the invention

[0004] The object of the present invention is to provide a valve sleeve processing and clamping device to solve the problem that the existing method of aligning the valve sleeve has low accuracy and affects the quality of the valve sleeve.

[0005] A valve sleeve processing and clamping device of the present invention includes a seat body, the seat body is provided with a positioning and clamping structure for clamping the valve sleeve, the positioning and clamping structure includes a through hole for passing the valve sleeve, an axial positioning structure is provided in the through hole and can be stopped by the annular surface of the outer convex ring of the valve sleeve close to the second end face, the length from the axial positioning structure to the end face of the seat body through which the conical surface passes is less than the length from the outer convex ring of the valve sleeve to the second end face of the valve sleeve, so that when the valve sleeve is installed in the seat body, its conical surface protrudes from the end face of the seat body, an directional hole is also provided on the seat body corresponding to the radial hole of the valve sleeve, a positioning pin is arranged in the directional hole, the positioning pin can pass through the directional hole and be inserted into the radial hole of the valve sleeve to circumferentially position the valve sleeve, and a tightening structure that can tighten the valve sleeve radially is also provided on the seat body.

[0006] Furthermore, the axial positioning structure is an annular step arranged in the through hole.

[0007] Furthermore, the tightening structure is arranged close to the annular step.

[0008] Furthermore, the tightening structure and the positioning pin are disposed on opposite sides of the valve sleeve.

[0009] Furthermore, the tightening structure is a screw tightening structure, which includes a threaded hole provided on the seat body and a screw matched with the threaded hole, and the end surface of the screw is used to tighten the valve sleeve.

[0010] Furthermore, the positioning and clamping structures are arranged in groups on the base body.

[0011] Furthermore, the seat body is provided with a clamping portion for clamping by a machine tool chuck, and the clamping portion is arranged perpendicular to the axis of the through hole.

[0012] Furthermore, the seat body is in the shape of a rectangular parallelepiped, and the clamping portion is arranged at an end portion of the seat body in the length direction.

[0013] The present invention proposes a new technical solution, which is to install the valve sleeve in the seat body, and to radially pass the locating pin through the radial holes of the seat body and the valve sleeve to circumferentially position the valve sleeve, thereby realizing the alignment of the valve sleeve. The locating pin can efficiently and accurately realize the alignment of the valve sleeve, and compared with the method of aligning with a needle, the accuracy of alignment is improved, and the accuracy of hole processing is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of a valve sleeve to be drilled for a hydraulic mechanism control valve; Figure 2 A cross-sectional view of a valve sleeve of a hydraulic mechanism control valve; Figure 3 for Figure 2 Left view of Figure 4 for Figure 2 A local enlarged schematic diagram at point A; Figure 5 A schematic diagram of the structure of clamping a valve sleeve using a valve sleeve processing and clamping device of the present invention; Figure 6 It is a front view of a valve sleeve processing and clamping device of the present invention; Figure 7 A bottom view of a valve sleeve processing and clamping device of the present invention; Figure 8 It is a right side view of a valve sleeve processing and clamping device of the present invention; Fig. 9 for Figure 6 Sectional view at BB.

[0015] In the figure: 1. valve sleeve; 11. first end face; 111. oil hole; 112. screw hole; 12. second end face; 121. conical hole; 13. radial hole; 14. outer convex ring; 2. seat body; 21. through hole; 211. annular step; 22. threaded hole; 23. directional hole; 24. outer hexagonal body; 3. positioning pin; 4. screw. DETAILED DESCRIPTION

[0016] The present invention proposes a new technical solution to the above technical problems. The core concept of the present invention is: the valve sleeve is installed in the seat body, and the positioning pin passes through the radial holes of the seat body and the valve sleeve to circumferentially position the valve sleeve, thereby realizing the alignment of the valve sleeve. The positioning pin can efficiently and accurately realize the alignment of the valve sleeve. Compared with the method of marking needle alignment, the alignment accuracy is improved and the accuracy of hole processing is guaranteed.

[0017] In view of the above-mentioned inventive concept, a valve sleeve processing and clamping device of the present invention comprises: Figure 5 The seat body 2 shown in the figure is provided with a positioning clamping structure for clamping the valve sleeve 1, and the positioning clamping structure includes a valve sleeve 1 for wearing. Figure 6 The through hole 21 shown in the figure has an axial positioning structure disposed inside the through hole 21, which can be stopped by the annular surface of the outer convex ring 14 of the valve sleeve 1 close to the second end face 12. When the oil hole 111 or the screw hole 112 on the first end face 11 of the valve sleeve 1 is processed, the valve sleeve 1 is subjected to a relatively large impact force in the axial direction. At this time, the axial positioning structure can ensure the reliability of the axial positioning of the valve sleeve 1. The length from the axial positioning structure to the end face of the seat body 2 through which the conical surface passes is less than the length from the outer convex ring 14 of the valve sleeve 1 to the second end face 12 of the valve sleeve 1, so that when the valve sleeve 1 is installed in the seat body 2, its conical surface protrudes from the end face of the seat body 2. If the conical surface does not protrude from the end face of the seat body 2, the drill bit will interfere with the seat body 2 when drilling. The conical surface protruding from the end face of the seat body 2 can avoid this problem and ensure the normal progress of the drilling process. The radial hole 13 on the seat body 2 corresponding to the valve sleeve 1 is also provided with the following Fig. 9 The directional hole 23 shown in the figure is provided with a positioning pin 3, and the positioning pin 3 can pass through the directional hole 23 and be inserted into the radial hole 13 of the valve sleeve 1 to circumferentially position the valve sleeve 1. The positioning pin 3 can efficiently and accurately realize the alignment of the valve sleeve 1. The seat body 2 is also provided with a tightening structure that can tighten the valve sleeve 1 radially. The tightening structure ensures that the valve sleeve 1 will not move during the processing, thereby ensuring the processing quality. The valve sleeve processing clamping device of the present invention realizes the alignment of the valve sleeve 1 through the positioning pin 3. Compared with the method of marking needle alignment, the accuracy of alignment is improved, and the accuracy of hole processing is ensured.

[0018] In this embodiment, the axial positioning structure is provided in the through hole 21 as follows Figure 8The annular step 211 is shown. The annular step 211 has a simple structure, can withstand a large axial force, and can reliably stop the valve sleeve 1 in the axial direction when the drill bit processes the first end face 11. In addition, in other embodiments, the axial positioning structure can also be a shaft ring set in the through hole 21 or a positioning protrusion extending radially inward, and it is only necessary to ensure that the axial positioning structure can stop the annular surface of the outer protruding ring 14 of the valve sleeve 1 close to the second end face 12.

[0019] In this embodiment, the tightening structure is arranged near the annular step 211. The annular step 211 can cooperate with the outer convex ring 14 of the valve sleeve 1, and the outer convex ring 14 is located in the middle of the valve sleeve 1. In this way, by arranging the tightening structure near the annular step, the tightening structure can apply a tightening force to the valve sleeve 1 near the middle position, thereby avoiding the valve sleeve from being subjected to a large bending moment due to the tightening force applied by the tightening structure to the valve sleeve 1 near the end position. Of course, in other embodiments, the tightening structure can also be arranged at a position close to the end of the seat body.

[0020] In this embodiment, the tightening structure and the positioning pin 3 are disposed on opposite sides of the valve sleeve 1. In this way, the tightening structure can apply a tightening force to the valve sleeve 1 on one side of the valve sleeve 1, and cooperate with the through hole 21 of the seat body 2 to clamp the valve sleeve 1 therebetween. The positioning pin 3 is disposed on the other side of the valve sleeve 1 to axially position the valve sleeve 1, and the spatial layout is reasonable. In addition, in other embodiments, the tightening structure and the positioning pin can also be disposed on adjacent sides of the valve sleeve. Only one tightening structure is provided in this embodiment. In addition, in other embodiments, the tightening structures can also be disposed in pairs to clamp the valve sleeve 1 from opposite sides of the valve sleeve 1.

[0021] In the present embodiment, the tightening structure is a screw tightening structure, which includes a threaded hole 22 provided on the seat body 2 and a screw 4 matched with the threaded hole 22, and the end face of the screw 4 is used to press the valve sleeve 1. The screw 4 tightening structure is simple in structure and convenient in manufacturing, and can effectively tighten the valve sleeve 1 to ensure that the valve sleeve 1 does not move during processing. In addition, in other embodiments, the tightening structure can also be a spring tightening structure, which includes a guide rod with a clamping plate at the end, the other end of the guide rod passes through the seat body 2 and is provided with an anti-slip part, and an elastic part that can apply an elastic force to the clamping plate toward one side of the valve sleeve 1 is provided between the clamping plate and the seat body 2, and it is only necessary to ensure that it can achieve the tightening of the valve sleeve 1.

[0022] In this embodiment, the positioning and clamping structures are arranged in groups on the seat body 2. In this embodiment, two positioning and clamping structures are arranged on the seat body 2, so that two valve sleeves 1 can be clamped and positioned at the same time, greatly improving the processing efficiency. It is easy to imagine that in other embodiments, only a single positioning and clamping structure can be arranged on the seat body 2, or three or more positioning and clamping structures can be arranged.

[0023] The seat body 2 is provided with a clamping portion that can be clamped by a machine tool chuck, and the clamping portion is arranged perpendicular to the axis of the through hole. If the clamping portion is not provided, the seat body 2 needs to be manually flipped when processing holes on both end faces of the valve sleeve 1, which is inconvenient to operate and the seat body 2 needs to be aligned after flipping. Therefore, in this embodiment, a clamping portion that can cooperate with the machine tool chuck is provided on the seat body 2. When the machine tool chuck rotates, the seat body 2 can be driven to flip, thereby realizing the automation of the processing process, and the machine tool chuck can drive the seat body 2 to flip along a fixed axis, thereby ensuring the relative position of the seat body 2 after rotation, and ensuring the accuracy of the drilling position. The clamping portion of this embodiment is as shown in FIG. Figure 7 , Figure 8 As shown, the outer hexagonal body 24 is provided on the side of the seat body, and the outer hexagonal body 24 can cooperate with the machine tool chuck. Of course, in other embodiments, the clamping part can also be cylindrical or cubic, as long as it can be clamped by the machine tool chuck. Of course, the clamping part can also be omitted, and the seat body can be replaced by manual flipping.

[0024] In this embodiment, the seat body 2 is in the shape of a rectangular parallelepiped, and the clamping portion is arranged at the end of the length direction of the seat body 2. When the clamping portion at the end of the length direction of the seat body 2 cooperates with the machine tool claw disc to rotate, the radial length of its rotation is small, and the required reserved installation space is small, which saves installation space. In addition, in other embodiments, the outer hexagonal body can also be arranged at the end of the width direction of the seat body 2, as long as the outer hexagonal body can cooperate with the machine tool chuck to realize the flipping of the seat body.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A valve sleeve processing and clamping device, characterized in that: The valve sleeve is provided with a positioning and clamping structure for clamping the valve sleeve, the positioning and clamping structure includes a through hole for inserting the valve sleeve, an axial positioning structure is provided in the through hole and can be stopped by the annular surface of the outer convex ring of the valve sleeve close to the second end surface, the length from the axial positioning structure to the end surface of the seat body through which the conical surface passes is less than the length from the outer convex ring of the valve sleeve to the second end surface of the valve sleeve, so that when the valve sleeve is installed in the seat body, its conical surface protrudes from the end surface of the seat body, an directional hole is also provided on the seat body corresponding to the radial hole of the valve sleeve, a positioning pin is arranged in the directional hole, the positioning pin can pass through the directional hole and be inserted into the radial hole of the valve sleeve to circumferentially position the valve sleeve, and a tightening structure that can tighten the valve sleeve radially is also provided on the seat body.

2. The valve sleeve processing and clamping device according to claim 1 is characterized in that : The axial positioning structure is an annular step arranged in the through hole.

3. The valve sleeve processing and clamping device according to claim 2 is characterized in that: The tightening structure is arranged close to the annular step.

4. The valve sleeve processing and clamping device according to any one of claims 1 to 3, characterized in that: The tightening structure and the positioning pin are disposed on opposite sides of the valve sleeve.

5. The valve sleeve processing and clamping device according to claim 4 is characterized in that: The tightening structure is a screw tightening structure, which includes a threaded hole arranged on the seat body and a screw matched with the threaded hole, and the end surface of the screw is used to tighten the valve sleeve.

6. The valve sleeve processing and clamping device according to any one of claims 1 to 3, characterized in that: The positioning and clamping structures are arranged in groups on the seat body.

7. The valve sleeve processing and clamping device according to any one of claims 1 to 3, characterized in that: The seat body is provided with a clamping portion for clamping by a machine tool chuck, and the clamping portion is arranged perpendicular to the axis of the through hole.

8. The valve sleeve processing and clamping device according to claim 7, characterized in that: The seat body is in a rectangular parallelepiped configuration, and the clamping portion is arranged at the end portion of the seat body in the length direction.

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