Cutter for finish machining of control valve mounting hole of valve block

Abstract

The utility model discloses a cutter for finish machining of a control valve mounting hole of a valve block, which comprises a cutter bar and a cutter head detachably fixed at a first end of the cutter bar, the cutter head and the cutter bar are coaxially arranged, and the cutter head is provided with a first blade for finish machining of a sealing chamfer of the control valve mounting hole. The cutter further comprises a second blade used for finish machining of the positioning inner wall of the control valve mounting hole, and the second blade is detachably fixed to the circumferential face of the cutter bar. According to the tool, finish machining of the mounting hole of the control valve can be completed with lower use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of valve block finish machining, and particularly relates to a tool for finish machining a control valve mounting hole of a valve block. Background Art

[0002] A valve block is a control element in a hydraulic system, mainly used to control the pressure, flow rate, and flow direction of the fluid in the hydraulic system, so as to meet the requirements of different actions of various actuators. Control valves, such as check valves, relief valves, throttle valves, etc., are installed in the control valve mounting holes of the valve block to enable the valve block to achieve the fluid control function. In order to ensure the smooth operation of each control valve and prevent liquid leakage problems in a high-pressure hydraulic environment, there are high requirements for the machining accuracy of the control valve mounting holes of the valve block. The traditional tool for finish machining the control valve mounting holes of the valve block is a multi-step integral reamer. The disadvantage of this tool is that as long as the size of a certain part of the control valve mounting hole exceeds the tolerance, the tool can only be replaced as a whole. And the tool is a non-standard customized part with a long production cycle and inconvenient for stockpiling. Therefore, using the existing tool to finish machine the control valve mounting holes of the valve block faces the problem of rising manufacturing costs. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a tool for finish machining a control valve mounting hole of a valve block, so as to complete the machining of the control valve mounting hole at a lower usage cost.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A tool for finish machining a control valve mounting hole of a valve block, comprising:

[0006] A tool shank;

[0007] A tool bit, detachably fixed to the first end of the tool shank, coaxially arranged with the tool shank, and the tool bit is provided with a first blade for finish machining the sealing chamfer of the control valve mounting hole;

[0008] A second blade, used for finish machining the positioning inner wall of the control valve mounting hole, and the second blade is detachably fixed to the peripheral surface of the tool shank.

[0009] Optionally, in the above tool, a first threaded hole is opened on the end face of the first end of the tool shank, a first mounting hole is opened through the tool bit along the axial direction, and the tool bit is fixedly connected to the tool shank by a first screw passing through the first mounting hole and the first threaded hole.

[0010] Optionally, in the above-mentioned tool, the end face of the first end of the tool shank has a frustum-shaped first protrusion, the first threaded hole is located at the axis of the first protrusion, and a first tapered hole that mates with the circumferential surface of the first protrusion is provided on the side of the tool head close to the tool shank; or,

[0011] The side of the tool head close to the tool shank has a frustum-shaped second protrusion, the first mounting hole is located at the axis of the second protrusion, and a second tapered hole that mates with the circumferential surface of the second protrusion is provided on the end face of the first end of the tool shank.

[0012] Optionally, in the above-mentioned tool, a first driving pin is provided at an eccentric position on the end face of the first end of the tool shank, and a first pin hole that mates with the first driving pin is provided on the side of the tool head close to the tool shank; and / or,

[0013] A second driving pin is provided at an eccentric position on the side of the tool head close to the tool shank, and a second pin hole that mates with the second driving pin is provided on the end face of the first end of the tool shank.

[0014] Optionally, in the above-mentioned tool, it includes a pressing plate connected to the tool shank by a second screw, and the second cutting blade is detachably and fixedly connected to the tool shank through the pressing plate.

[0015] Optionally, in the above-mentioned tool, it includes at least three support guide bars provided on the circumferential surface of the tool shank, the support guide bars are evenly distributed around the axis of the tool shank, and the extending direction of the support guide bars is parallel to the axis of the tool shank.

[0016] Optionally, in the above-mentioned tool, a liquid through hole is provided on the end face of the second end of the tool shank opposite to the first end, the liquid through hole is located at the axis of the tool shank, and the tool shank is provided with an internal cooling hole that penetrates from the liquid through hole to the circumferential surface of the tool shank.

[0017] Optionally, in the above-mentioned tool, the support guide bars are connected to the tool shank by welding, and the material of the support guide bars is cemented carbide, cermet or polycrystalline diamond.

[0018] Optionally, in the above-mentioned tool, the first cutting blade is welded to the tool head, and the material of the first cutting blade is cermet.

[0019] Optionally, in the above-mentioned tool, the material of the second cutting blade is cemented carbide, and a chemical vapor deposition coating is provided on the surface of the second cutting blade.

[0020] The tool provided by the present utility model has the following beneficial effects:

[0021] The first blade on the tool head and the second blade on the tool shank respectively process different parts of the control valve installation hole. The first blade finely processes the sealing chamfer, and the second blade finely processes the positioning inner wall. Since both the tool head and the second blade are detachably fixed to the tool shank, when a certain dimension of the control valve installation hole after fine processing exceeds the tolerance, there is no need to replace the whole tool, and only the tool head or the second blade needs to be replaced, which is beneficial to reducing the production cost. Moreover, both the tool head and the second blade can be mass-produced in a standardized way, so it is beneficial to shorten the tool production cycle and facilitate inventory preparation. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 is a three-dimensional exploded view of a tool provided by an embodiment of the present invention for finely processing the control valve installation hole of a valve block;

[0024] Figure 2 is a front exploded view of the tool provided by an embodiment of the present invention;

[0025] Figure 3 is along Figure 2 the A-A line in

[0026] Figure 4 is a sectional view of the assembly of the tool provided by an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a control valve installed in the control valve installation hole of a valve block.

[0028] The labels in the figure are:

[0029] 1. First screw; 2. Tool head; 21. First mounting hole; 22. First pin hole; 23. First tapered hole; 3. Tool shank; 31. Internal cooling hole; 32. First driving pin; 33. First protrusion; 4. Connecting flange; 5. First blade; 6. Second blade; 7. Support guide bar; 8. Pressure plate; 9. Valve block; 91. Sealing chamfer; 92. Positioning inner wall. Detailed Embodiment

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Referring to Figures 1 to 5 , an embodiment of the present invention provides a tool for finishing the control valve installation hole of a valve block, including a tool shank 3 and a tool tip 2 detachably fixed to the first end of the tool shank 3. The tool tip 2 is coaxially arranged with the tool shank 3. The tool tip 2 is provided with a first cutting blade 5 for finishing the sealing chamfer of the control valve installation hole. The tool further includes a second cutting blade 6 for finishing the positioning inner wall of the control valve installation hole. The second cutting blade 6 is detachably fixed to the circumferential surface of the tool shank 3. It should be noted that the tool of the present invention is used for the finishing of the control valve installation hole, that is, for removing the thin layer of material on the inner surface of the already machined control valve installation hole on the valve block. It is easy to understand that the first end of the tool shank 3 is the front end of the working part of the tool. The first cutting blade 5 on the tool tip 2 processes the part of the control valve installation hole far from the outer surface of the valve block 9. This part is in sealing contact with the valve body after installing the control valve, as Figure 5 shown, one end of the valve body of the control valve abuts against the sealing chamfer 91 of the control valve installation hole to form a sealing contact. The second cutting blade 6 on the tool shank 3 processes the positioning inner wall of the control valve installation hole. This inner wall forms a shaft-hole fit with the valve body of the control valve to ensure the accurate installation position of the control valve, as Figure 5 shown, the outermost circumferential surface of the valve body of the control valve fits with the positioning inner wall 92 of the control valve installation hole. Since both the tool tip 2 and the second cutting blade 6 are detachably fixed to the tool shank 3, when a certain dimension of the finished control valve installation hole is out of tolerance, it is not necessary to replace the whole tool, but only need to replace the tool tip 2 or the second cutting blade 6. This is beneficial to reducing the production cost. Moreover, both the tool tip 2 and the second cutting blade 6 can be mass-produced in a standardized manner. Therefore, it is beneficial to shorten the tool production cycle and facilitate inventory.

[0032] As Figure 3 and Figure 4As shown, in some embodiments, a first threaded hole may be formed in the end face of the first end of the tool shank 3, and the tool head 2 may be provided with a first mounting hole 21 that penetrates the tool head 2 axially. The tool head 2 is fixedly connected to the tool shank 3 by a first screw 1 passing through the first mounting hole 21 and the first threaded hole. The first screw 1 may be an internal hexagonal screw, and the first mounting hole 21 may be in the form of a counterbore. Of course, in other embodiments, the tool head 2 and the tool shank 3 may also be fixedly connected by other connection structures. For example, an external thread may be provided at the first end of the tool shank 3, and an internal thread that is screwed with the external thread may be provided on the tool head 2, so that the tool head 2 and the tool shank 3 are fixed together by their own threaded connection structure.

[0033] As Figures 1 to 3 shown, in some embodiments, the end face of the first end of the tool shank 3 may have a frustum-shaped first protrusion 33, the first threaded hole is located at the axis of the first protrusion 33, and a first tapered hole 23 that mates with the circumferential surface of the first protrusion 33 may be formed on the side of the tool head 2 close to the tool shank 3. When assembling the tool head 2 and the tool shank 3, the tool head 2 is axially moved to the first end of the tool shank 3 so that the first tapered hole 23 of the tool head 2 fits with the first protrusion 33 of the tool shank 3, which can ensure the connection accuracy between the tool head 2 and the tool shank 3. It is easy to understand that in other embodiments, a protrusion may also be provided on the tool head 2 and a tapered hole may be provided on the tool shank 3, that is, the side of the tool head 2 close to the tool shank 3 has a frustum-shaped second protrusion, the first mounting hole 21 is located at the axis of the second protrusion, and the end face of the first end of the tool shank 3 is provided with a second tapered hole that mates with the circumferential surface of the second protrusion, which can also ensure the connection accuracy between the tool head 2 and the tool shank 3 during assembly.

[0034] As Figure 4 shown, on the basis of providing the first protrusion 33 and the first tapered hole 23, when the first protrusion 33 fits with the first tapered hole 23, the part of the end face of the first end of the tool shank 3 outside the first protrusion 33 may also fit with the part of the side of the tool head 2 close to the tool shank 3 outside the first tapered hole 23, so as to improve the connection accuracy between the tool head 2 and the tool shank 3 by using the over-positioning method.

[0035] As Figures 1 to 3As shown, in some embodiments, a first driving pin 32 may be provided at an eccentric position on the end face of the first end of the tool shank 3. A first pin hole 22 adapted to cooperate with the first driving pin 32 may be formed on one side of the tool head 2 close to the tool shank 3. After the tool head 2 is assembled onto the tool shank 3, the first driving pin 32 is inserted into the first pin hole 22, which can improve the ability of the tool to bear the cutting force. It is easy to understand that in other embodiments, a driving pin may also be provided on the tool head 2 and a pin hole may be provided on the tool shank 3, that is, a second driving pin is provided at an eccentric position on one side of the tool head 2 close to the tool shank 3, and a second pin hole adapted to cooperate with the second driving pin is formed on the end face of the first end of the tool shank 3, which can also achieve the effect of improving the ability of the tool to bear the cutting force. Of course, the tool shank 3 may be provided with the first driving pin 32 and the second pin hole at the same time, and the tool head 2 may be provided with the first pin hole 22 and the second driving pin at the same time. When the tool head 2 and the tool shank 3 are assembled, the first driving pin 32 is inserted into the first pin hole 22, and the second driving pin is inserted into the second pin hole.

[0036] As Figure 2 shown, in some embodiments, the tool may include a pressing plate 8 connected to the tool shank 3 by a second screw (not shown in the figure). The second cutting blade 6 is detachably and fixedly connected to the tool shank 3 through the pressing plate 8, that is, the second cutting blade 6 is pressed and fixed on the tool shank 3 by the pressing plate 8. Fixing the second cutting blade 6 through the pressing plate 8 can avoid forming mounting holes on the second cutting blade 6, so that the second cutting blade 6 has a relatively high overall structural strength. Moreover, the pressing plate 8 forms an overall coverage in the length direction of the second cutting blade 6 and presses most of the second cutting blade 6, which is beneficial to avoiding deformation of the second cutting blade 6 during the working process and affecting the machining accuracy. Of course, in other embodiments, the second cutting blade 6 may also be detachably and fixedly connected to the tool shank 3 through other connection structures. For example, the second cutting blade 6 may be provided with at least two mounting holes distributed along the length direction, and the second cutting blade 6 is fixed to the tool shank 3 through at least two screws.

[0037] As Figure 1 and Figure 2 shown, in some embodiments, the tool may include at least three support guide bars 7 provided on the peripheral surface of the tool shank 3. The support guide bars 7 are evenly distributed around the axis of the tool shank 3, and the extending direction of the support guide bars 7 is parallel to the axis of the tool shank 3. The support guide bars 7 evenly distributed in the circumferential direction of the tool shank 3 can play a role in keeping the rotating tool stable, so as to obtain better machining accuracy for the control valve mounting hole. The support guide bars 7 may be connected to the tool shank 3 by welding, and the material of the support guide bars 7 may be cemented carbide, cermet or polycrystalline diamond. Of course, in other embodiments, the support guide bars 7 may also be provided as an integral structure with the tool shank 3.

[0038] On the basis of being provided with the supporting guide bar 7, a liquid through-hole may be formed in the end face of the second end of the tool shank 3 opposite to the first end. The liquid through-hole is located on the axis of the tool shank 3, and the tool shank 3 may be provided with an internal coolant hole 31 that penetrates from the liquid through-hole to the peripheral surface of the tool shank 3. As Figure 2 shown, the internal coolant hole 31 may be correspondingly arranged beside the supporting guide bar 7. During the working process of the tool, the coolant reaches the peripheral surface of the tool shank 3 through the liquid through-hole and the internal coolant hole 31 inside the tool shank 3, playing a role in cooling and lubricating the supporting guide bar 7.

[0039] The first cutting blade 5 may be welded to the tool tip 2 or may be mounted on the tool tip 2 by screws. The material of the first cutting blade 5 may be cermet. The material of the second cutting blade 6 may be cemented carbide. In order to improve the service life, a chemical vapor deposition coating may be provided on the surface of the second cutting blade 6. The handle of the tool may be provided with a connecting flange 4 for connecting with the machine tool, and the connecting flange 4 may be arranged on the tool holder that is detachably connected to the tool shank 3.

[0040] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference may be made to each other.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool for fine machining of a control valve mounting hole of a valve block, characterized in that: include: Tool bar; A cutter head is detachably fixed to the first end of the cutter rod and is coaxially arranged with the cutter rod, wherein the cutter head is provided with a first blade for finely machining the sealing chamfer of the control valve mounting hole; The second blade is used for finishing the positioning inner wall of the control valve mounting hole, and the second blade is detachably fixed to the peripheral surface of the blade rod.

2. The tool according to claim 1, characterized in that A first threaded hole is formed on the end surface of the first end of the tool rod, and a first mounting hole is formed on the tool head that penetrates the tool head axially. The tool head is fixedly connected to the tool rod by a first screw that penetrates the first mounting hole and the first threaded hole.

3. The tool according to claim 2, characterized in that The end surface of the first end of the tool rod has a first truncated cone-shaped protrusion, the first threaded hole is located at the axis of the first protrusion, and the side of the tool head close to the tool rod is provided with a first tapered hole matching the circumference of the first protrusion; or, The cutter head has a second truncated cone-shaped protrusion on one side close to the cutter rod, the first mounting hole is located at the axis of the second protrusion, and the end surface of the first end of the cutter rod is provided with a second tapered hole that matches the circumference of the second protrusion.

4. The tool according to claim 3, characterized in that A first driving pin is disposed at an eccentric position on the end surface of the first end of the knife rod, and a first pin hole cooperating with the first driving pin is formed on a side of the knife head close to the knife rod; and / or, A second driving pin is arranged at an eccentric position on one side of the cutter head close to the cutter rod, and a second pin hole cooperating with the second driving pin is arranged on the end surface of the first end of the cutter rod.

5. The tool according to claim 1, characterized in that It comprises a pressing plate connected to the knife rod through a second screw, and the second blade is detachably fixedly connected to the knife rod through the pressing plate.

6. The tool according to claim 1, characterized in that It comprises at least three supporting guide bars arranged on the circumference of the knife rod, the supporting guide bars are evenly distributed around the axis of the knife rod, and the extending direction of the supporting guide bars is parallel to the axis of the knife rod.

7. The tool according to claim 6, characterized in that A liquid through hole is formed on the end surface of the second end of the tool rod opposite to the first end. The liquid through hole is located at the axis of the tool rod. The tool rod is provided with an internal cooling hole that passes through the liquid through hole to the peripheral surface of the tool rod.

8. The tool according to claim 6, characterized in that The support guide bar is connected to the knife rod by welding, and the material of the support guide bar is cemented carbide, metal ceramic or polycrystalline diamond.

9. The tool according to any one of claims 1 to 8, characterized in that: The first blade is welded to the cutter head, and the material of the first blade is metal ceramic.

10. The tool according to any one of claims 1 to 8, characterized in that: The material of the second blade is cemented carbide, and a chemical vapor deposition coating is arranged on the surface of the second blade.

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