Drilling device convenient for replacing valve core

Abstract

The utility model discloses a drilling device convenient for replacing a valve core. The drilling device comprises a machine table, a drilling mechanism, a rotary driving mechanism and a clamping mechanism, the center axis direction of the output end of the rotary driving mechanism of the drilling device convenient to replace the valve element is perpendicular to the center axis direction of the output end of the drilling mechanism, alignment and centering are facilitated, the clamping mechanism is arranged, so that a valve rod cannot rotate in the whole drilling period, the stability in the whole drilling period is ensured, and the drilling efficiency is improved. The problem that the drilling position is not accurate can be effectively solved, the overall operation precision of the valve element in the tapping operation mode is improved, and the coaxiality of a hole formed in the valve element and a hole formed in an old valve rod is guaranteed. The whole mechanism of the matched drilling device facilitating replacement of the valve element is simple in structure, clear and convenient to operate, capable of conveniently achieving the positioning adjustment requirement for transverse moving and overturning of the valve element and valve rod assembly to be machined, and suitable for various different types of valve elements and different hole machining modes.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power drilling equipment, in particular to a drilling device which is convenient for replacing a valve core. Background Art

[0002] The valve core of nuclear power equipment will wear out after working for a period of time and needs to be replaced, but the valve stem can generally continue to be used. In order to improve material utilization and save costs, the new valve core needs to be installed on the old valve stem. The old valve stem has a mounting hole when it is matched with the old valve core, but there is no hole on the new valve core. Generally, the new valve core needs to be put on the old valve stem and blindly drilled on the new valve core. However, the existing method of drilling holes on the valve core has a low overall operating accuracy, and it is difficult to ensure the coaxiality of the hole opened in the valve core and the hole in the old valve stem. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing method of drilling holes in the valve core has low overall operation accuracy and it is difficult to ensure the coaxiality of the hole opened in the valve core and the hole of the old valve stem.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a drill matching device that is convenient for replacing the valve core, which includes:

[0005] Machine;

[0006] A drilling mechanism, which can be movably mounted on the machine platform and is used to drill holes in the valve core;

[0007] A rotary drive mechanism is mounted on the machine platform, wherein the central axis of the output end of the rotary drive mechanism is perpendicular to the central axis of the output end of the drilling mechanism;

[0008] The clamping mechanism is used to clamp the valve stem. The clamping mechanism is connected to the output end of the rotary drive mechanism and can rotate around a first axis under the drive of the rotary drive mechanism. The first axis is parallel to the central axis of the output end of the rotary drive mechanism.

[0009] In some embodiments, the clamping mechanism includes a first clamping connector, a clamping sleeve, and a plurality of locking members;

[0010] The first clamping connector is connected to the output end of the rotary drive mechanism, the clamping sleeve is installed on a side of the first clamping connector away from the rotary drive mechanism, and has a clamping cavity for clamping the valve stem, and the extending direction of the clamping cavity is parallel to the first axis;

[0011] The plurality of locking members are arranged at intervals along the circumference of the clamping sleeve, and the plurality of locking members are threadedly connected to the clamping sleeve, and are used to lock the valve stem into the clamping cavity.

[0012] In some embodiments, the clamping mechanism further comprises an insertion rod, a second clamping connector, and a fastener;

[0013] The insertion rod is installed in the clamping cavity of the clamping sleeve, the second clamping connector is arranged on the side of the first clamping connector away from the rotation drive mechanism and is connected to the insertion rod, the fastener is installed on the second clamping connector, and the fastener is provided with a clamping hole for installing the valve stem, and the central axis of the clamping hole is arranged to intersect with the first axis.

[0014] In some embodiments, the drill assembly device for facilitating replacement of the valve core includes an adjustment and positioning mechanism, and the adjustment and positioning mechanism includes a bottom plate, a lifting assembly, a first positioning plate, and a second positioning plate;

[0015] The bottom plate is mounted on the machine platform; the lifting assembly is mounted on a side of the bottom plate away from the machine platform, and can move relative to the bottom plate along the X-axis direction of the machine platform; the first positioning plate is mounted on a side of the lifting assembly away from the bottom plate; the second positioning plate is mounted on a side of the first positioning plate away from the lifting assembly, and can move relative to the first positioning plate along the Y-axis direction of the machine platform;

[0016] The second positioning plate is also provided with a fastener, and the fastener is used to lock and fix the valve core;

[0017] Wherein, the lifting assembly is used to drive the first positioning plate and the second positioning plate to rise and fall.

[0018] In some embodiments, the bottom plate is provided with a bar hole extending along the X-axis direction of the machine platform, the lifting assembly is slidably mounted in the bar hole, and the drilling device for facilitating replacement of the valve core further comprises a first fixing member, and when the lifting assembly slides to a preset position relative to the bar hole, the first fixing member can detachably fix the lifting assembly to the bottom plate;

[0019] And / or, the first positioning plate is provided with a plurality of first connecting holes arranged at intervals along the Y-axis direction of the machine, and the second positioning plate is provided with a second connecting hole. The drilling device for facilitating replacement of the valve core also includes a second fixing member. When the second connecting hole is arranged opposite to any of the first connecting holes, the second fixing member can be sequentially passed through the oppositely arranged first connecting hole and the second connecting hole to detachably fix the second positioning plate to the first positioning plate.

[0020] In some embodiments, the lifting assembly includes:

[0021] A base, mounted on a side of the bottom plate away from the machine platform, and capable of moving relative to the bottom plate along the X-axis direction of the machine platform;

[0022] A support plate is provided on a side of the base away from the bottom plate and is arranged opposite to the base, and the first positioning plate is installed on a side of the support plate away from the base;

[0023] A first movable block is slidably connected to the base and is capable of reciprocating along a first direction, wherein the first direction is perpendicular to the X-axis direction of the machine platform;

[0024] A second movable block is slidably connected to the support plate and is disposed opposite to the first movable block and is capable of reciprocating along a first direction;

[0025] A first fixed block, fixedly connected to the base and located on a side of the base away from the first movable block;

[0026] A second fixing block, fixedly connected to the support plate and arranged opposite to the first fixing block;

[0027] A first connecting rod, one end of which is rotatably connected to the first fixed block via a first rotating shaft, and the other end of which is rotatably connected to the second movable block via a second rotating shaft;

[0028] a second connecting rod, one end of which is rotatably connected to the first movable block via a third rotating shaft, the other end of which is rotatably connected to the second fixed block via a fourth rotating shaft, the extension direction of the second connecting rod being arranged to intersect with the extension direction of the first connecting rod, and the second connecting rod being rotatably connected to the first connecting rod via a fifth rotating shaft;

[0029] Wherein, the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft and the fifth rotating shaft are all arranged parallel to each other.

[0030] In some embodiments, the base is provided with a first slide groove extending along the first direction, and the first movable block is slidably mounted in the first slide groove and is restricted from escaping from the first slide groove;

[0031] And / or, the support plate is provided with a second slide groove extending along the first direction, and the second movable block is slidably installed in the second slide groove and is restricted from escaping from the second slide groove.

[0032] In some embodiments, the lifting assembly also includes a lap plate and an adjusting member, the lap plate is connected to the first movable block, the adjusting member includes an operating part and a transmission rod fixedly connected to the operating part, the transmission rod is passed through the side end portion of the base and is transmission-connected to the side end portion of the base, and the end of the transmission rod away from the operating part is connected to the lap plate.

[0033] In some embodiments, the drilling device for facilitating replacement of the valve core further comprises an alignment mechanism, wherein the alignment mechanism comprises a measuring block and an edge finder;

[0034] The measuring block comprises a measuring body and a pin gauge, wherein the pin gauge is connected to the center position of one side of the measuring body, the measuring body is mounted on the outer periphery of the valve stem, and the pin gauge is inserted into the positioning hole of the valve stem;

[0035] The edge finder is installed on the drilling mechanism, and is used to cooperate with the measuring block to determine the position of the locating hole of the valve stem.

[0036] In some embodiments, the drilling mechanism includes a support frame, a drilling drive motor, and a drilling head;

[0037] The support frame is mounted on the machine platform and is movably connected to the machine platform. The drilling drive motor is mounted on the support frame. The drilling drive motor is drivingly connected to the drilling head.

[0038] The implementation of the utility model has the following beneficial effects: the central axis direction of the output end of the rotary drive mechanism of the drill device for facilitating the replacement of the valve core is arranged perpendicularly to the central axis direction of the output end of the drilling mechanism, which is convenient for alignment and centering. By setting a clamping mechanism, the valve stem will not rotate during the entire drilling period, ensuring the stability during the entire drilling period, effectively avoiding the problem of inaccurate drilling position, improving the overall operation accuracy of the valve core hole processing operation, and ensuring the coaxiality of the hole opened by the valve core and the hole of the old valve stem. In addition, the overall structure of the drill device for facilitating the replacement of the valve core is simple, the operation method is clear and convenient, and the positioning and adjustment requirements for the lateral shift and flipping of the valve core and valve stem assembly to be processed can be realized more conveniently. It can be suitable for a variety of different types of valve cores and different hole processing methods, and improves the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0040] Figure 1 It is a schematic diagram of the overall structure of a drill-matching device that facilitates replacement of a valve core in some embodiments of the utility model;

[0041] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0042] Figure 3 It is a schematic diagram of the structure of the clamping mechanism in some embodiments of the utility model;

[0043] Figure 4 It is a schematic diagram of the structure of the lifting assembly in some embodiments of the utility model;

[0044] Figure 5 It is a schematic diagram of the structure of the oblique hole fixture in some embodiments of the utility model;

[0045] Figure 6 It is a schematic diagram of the structure of the straight hole fixture in some embodiments of the utility model;

[0046] Figure 7 It is a schematic diagram of the application of the measuring block in some embodiments of the utility model. DETAILED DESCRIPTION

[0047] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0048] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0049] See also Figures 1 to 7 , is a drilling device for facilitating replacement of valve cores in some embodiments of the utility model. The valve core 1 is connected with the valve stem 2 by threading, and the valve core 1 is fixed as an assembly by pins. Due to long-term fluid erosion, the sealing surface of the valve core 1 is easily damaged. When the defect is large, it needs to be replaced, but the valve stem 2 can generally continue to be used. In order to improve material utilization and save costs, the pin can be removed from the valve core 1 assembly and the old valve stem can be used to screw into the new valve core and re-drill. However, since the pin and the pin hole are interference fit, and the end of the pin is deformed by riveting, it is difficult to remove the pin by knocking. In addition, the pin hole on the old valve stem is in the threaded section, and it cannot be used as a positioning reference after the new valve core is screwed in, so it is impossible to ensure that the newly opened hole on the valve core 1 is coaxial with the hole of the old valve stem. In view of the above problems, the utility model proposes a drilling device for facilitating replacement of valve cores to solve the above problems.

[0050] like Figure 1 As shown, the drilling device for facilitating replacement of the valve core includes a machine platform, a drilling mechanism 6, a rotary drive mechanism 4 and a clamping mechanism 5. In this embodiment, according to Figure 1 The XYZ rectangular coordinate system established in the definition is: the direction of the X axis of the machine is Figure 1The direction of the valve stem 2 is perpendicular to the direction of the machine Y axis and the direction of the machine X axis, while the direction of the machine Z axis is the height direction of the machine. The machine (not shown) is a CNC machine tool with mature technology, which can automatically process the processed part using the drilling mechanism 6 according to the pre-compiled processing program. The processed part is the valve core 1 in this embodiment. The processing route, process parameters, tool motion trajectory, displacement, cutting parameters and auxiliary functions of the processed part can be written into a processing program sheet according to the instruction code and program format specified by the CNC machine tool, and then the content of the program sheet is recorded on the control medium, and then input into the CNC device of the CNC machine tool, so as to command the machine tool to process the part.

[0051] Furthermore, the drilling mechanism 6 can be movably mounted on the machine platform and used to drill the valve core 1. The rotary drive mechanism 4 is mounted on the machine platform. The central axis of the output end of the rotary drive mechanism 4 is perpendicular to the central axis of the output end of the drilling mechanism 6. The central axis of the output end of the drilling mechanism 6 is the central axis of the main shaft of the drilling drive motor 62 described below. Since there is a positioning hole on the valve stem 2, the first thing to do is to find the position of the positioning hole, and then install the valve core 1 and drill the hole. The above vertical setting can facilitate vertical alignment, alignment and centering. The clamping mechanism 5 is used to clamp the valve stem 2. The clamping mechanism 5 is connected to the output end of the rotary drive mechanism 4 and can rotate around the first axis under the drive of the rotary drive mechanism 4. The first axis is parallel to the central axis of the output end of the rotary drive mechanism 4. The central axis of the output end of the rotary drive mechanism 4 is parallel to the X-axis of the machine platform. When the clamping mechanism 5 fixes and clamps the valve stem 2, the valve core 1 can be connected to the valve stem 2 by a pin, and then the drilling mechanism 6 is used to perform drilling work. The drilling mechanism 6 can move the processing route according to a pre-compiled processing program and perform drilling processing on the valve core 1.

[0052] Among them, the drilling device for facilitating replacement of the valve core also includes an adjusting and positioning mechanism 7. It can be understood that since the valve core 1 to be processed can be divided into a butterfly valve core and a common valve core, and the valve core 1 to be processed needs to be processed in several common pin hole forms such as straight holes, tapered holes and inclined holes, the drilling device for facilitating replacement of the valve core can be set with different structures according to different types of valve cores 1 and different hole forms to be processed, such as Figure 1 and Figure 2 As shown, the butterfly valve core has edges on both sides. When the valve core 1 to be processed is a butterfly valve core, or a straight hole or a tapered hole needs to be drilled, the adjusting and positioning mechanism 7 can be used. The adjusting and positioning mechanism 7 is installed on the machine platform and can be used to adjust the height position of the valve core 1.

[0053] like Figure 1 and Figure 2As shown, the drilling mechanism 6 includes a support frame 61, a drilling drive motor 62, a drilling head 63 and a protective cover 64. The support frame 61 is installed on the machine platform and is movably connected to the machine platform. The support frame 61 can move the processing route according to the pre-compiled processing program, and the support frame 61 can move the XY axis with high precision. In addition, the drilling drive motor 62 is installed on the support frame 61, and the drilling drive motor 62 is driven and connected to the drilling head 63. The drilling drive motor 62 can drive the drilling head 63 to perform the drilling process. The drilling head 63 can be replaced according to the type of hole to be processed by the valve core 1. The protective cover 64 is installed on the support frame 61 and covers the drilling drive motor 62 to protect the drilling drive motor 62.

[0054] Among them, since the pin hole on the old valve stem is in the threaded section, it cannot be used as a positioning reference after the new valve core is screwed in, so it is impossible to ensure that the newly opened hole on the valve core 1 is coaxial with the hole of the old valve stem. In view of the above problems, the drilling device for facilitating replacement of the valve core also includes a alignment mechanism to achieve a high-precision hole alignment process. The alignment mechanism includes a measuring block 8 and an edge finder, such as Figure 7 As shown, the measuring block 8 includes a measuring body 81 and a needle gauge 82. The needle gauge 82 is connected to the center position of one side of the measuring body 81. The measuring body 81 is installed on the outer periphery of the valve stem 2, and the needle gauge 82 is inserted into the positioning hole of the valve stem 2. The edge finder is installed on the drilling mechanism 6. The edge finder is used to cooperate with the measuring block 8 to determine the position of the positioning hole of the valve stem 2.

[0055] Specifically, the edge finder is a detection tool used in CNC machining to accurately determine the center position of the workpiece being machined. The working principle of the edge finder is to first select one side on the X-axis as zero, then select the other side to obtain a value, take half of it as the midpoint of the X-axis, and then find the origin of the Y-axis in the same way, so that the machining center of the workpiece in the XY plane is determined. The edge finder can be divided into two types: mechanical edge finders and electronic edge finders. The mechanical edge finder mainly measures the position and shape of the workpiece surface through mechanical contact, while the electronic edge finder uses a sensor to measure the distance from the object surface to a fixed distance, and displays the position of the edge through a reading device. In this embodiment, a mechanical edge finder, an electronic edge finder or other types of edge finders can be selected for the centering process, which is not specifically limited here. The application of the edge finder is an existing mature technology and will not be repeated here.

[0056] The measuring block 8 is used in conjunction with the auxiliary edge finder to determine the position of the locating hole of the valve stem 2. The measuring block 8 is a rectangular block, and the needle gauge 82 is located at the center of the measuring body 81. In the specific alignment process and centering process, the needle gauge 82 is first placed at the locating hole of the valve stem 2, and the measuring body 81 is located between the drilling mechanism 6 and the locating hole of the valve stem 2. When the rotation speed of the drilling head 63 is at the preset value, the edge finder is slowly approached to the measuring body 81. When the edge finder touches the measuring body 81, the edge finder will light up and an alarm will sound. The edge finding is successful, and the machine tool programming system is operated to remember the current coordinates. Similarly, the four-point coordinates of the X-axis and Y-axis directions of the measuring body 81 are found, and the center point of the measuring body 81 is automatically calculated. The center point of the measuring body 81 is the installation point of the needle gauge 82. By obtaining the position of the center point of the measuring body 81, the position of the locating hole of the valve stem 2 can be determined.

[0057] During this process, the dial indicator can also be used to coordinate the axial alignment. The specific process of using the dial indicator to find the position of the positioning hole is as follows: before alignment, first lower the main shaft of the drilling drive motor 62 to the vicinity of the surface of the valve stem 2, roughly make the axis of the main shaft of the drilling drive motor 62 coaxial with the center axis of the positioning hole of the valve stem 2, then lift the main shaft of the drilling drive motor 62 to a certain height, adsorb the magnetic base of the dial indicator on the main shaft end face of the drilling drive motor 62, install the dial indicator head, and make the head perpendicular to the positioning hole of the valve stem 2. When aligning, the X-axis or Y-axis can be aligned separately first. If the X-axis is aligned first, the Y-axis is set to be fixed, and the coordinates of the valve stem 2 in the X direction are adjusted. The main shaft of the drilling drive motor 62 makes the dial indicator rotate around the workpiece between points X1 and X2. By repeatedly adjusting the movement of the machine in the X direction, the position of the dial indicator pointer at point X1 is the same as that at point X2, indicating that the alignment of the X axis is completed. Similarly, the alignment of the Y axis is performed. The technology for finding the center of the dial indicator is a mature technology available now and will not be described in detail here.

[0058] In addition, the machine is provided with a motor positioning frame 31 , which is provided with a motor positioning bar hole 311 for installing the rotary drive mechanism 4 , so that the rotary drive mechanism 4 can be conveniently installed on the motor positioning frame 31 and is easy to adjust.

[0059] Furthermore, the clamping mechanism 5 includes a first clamping connector 51, a clamping sleeve 52, and a plurality of locking members 53. The first clamping connector 51 is connected to the output end of the rotary drive mechanism 4. The first clamping connector 51 can be connected to the output end of the rotary drive mechanism 4 by fasteners such as bolts. The clamping sleeve 52 is installed on the side of the first clamping connector 51 away from the rotary drive mechanism 4, and has a clamping cavity for clamping the valve stem 2. The extension direction of the clamping cavity is parallel to the first axis. In addition, a plurality of locking members 53 are arranged at intervals along the circumference of the clamping sleeve 52, and the plurality of locking members 53 are threadedly connected to the clamping sleeve 52, which is used to lock the valve stem 2 into the clamping cavity.

[0060] It can be understood that the clamping sleeve 52 is designed to be elastically relaxed. The clamping sleeve 52 can be an elastic clamping sleeve, which is generally made of spring steel or rubber. These materials have a high elastic modulus and can be elastically deformed under the action of external force and then restore to the original shape. The workpiece is placed between the clamping jaws of the elastic clamp. At this time, the elastic material is in the initial state and maintains the original shape in the absence of external force. Then, multiple locking members 53 are screwed, and the elastic material is deformed at this time, closing the clamping jaws so that the component is firmly fixed on the elastic clamp.

[0061] like Figure 6 As shown, if it is necessary to drill a hole in an ordinary valve core, the clamping sleeve 52 can directly clamp the valve stem 2 that cooperates with the ordinary valve core, eliminating the need to cooperate with the butterfly valve core 1, thereby directly drilling a straight hole. This also allows the clamping of the entire clamping sleeve 52 to be better varied and used, and this clamping method can be selected according to actual processing requirements.

[0062] Furthermore, if it is necessary to process the valve core 1 with an inclined hole, such as Figure 5 As shown, the clamping mechanism 5 also includes an insert rod (not shown), a second clamping connector 55 and a fastener 56. The insert rod is installed in the clamping cavity of the clamping sleeve 52 to be clamped and locked by the clamping sleeve 52, and the second clamping connector 55 is arranged on the side of the first clamping connector 51 away from the rotary drive mechanism 4 and is connected to the insert rod. The fastener 56 is installed on the second clamping connector 55. The fastener 56 is provided with a clamping hole 561 for installing the valve stem 2, and the central axis of the clamping hole 561 is arranged to intersect with the first axis. It can be understood that the second clamping connector 55 can be fixedly connected to the plug rod by bolts or welded to the plug rod, and the fastener 56 is used to fix and clamp the valve stem 2, and the central axis of the clamping hole 561 is arranged to intersect with the first axis, that is, the central axis of the clamping hole 561 is parallel to the axial end face of the first clamping connector 51, so that the valve stem 2 can have different inclination angles relative to the horizontal plane, which is convenient for the processing of the drilling mechanism 6 and also allows the drilling mechanism 6 to perform oblique hole processing on the valve core 1.

[0063] More specifically, when the valve stem 2 is fixedly clamped on the fastener 56, the rotary driver 41 can drive the plug rod to rotate, thereby causing the valve stem 2 to rotate as well, so that the valve stem 2 can have different inclination angles relative to the horizontal plane. After the valve stem 2 is installed on the valve core 1, the valve core 1 can obtain an inclined hole when drilling, further improving the diversity of the hole opening.

[0064] As described above, when the valve core 1 to be processed is a butterfly valve core, or when a straight hole or a tapered hole needs to be drilled, the adjusting and positioning mechanism 7 can be used. The adjusting and positioning mechanism 7 includes a bottom plate 32, a lifting assembly 71, a first positioning plate 72, and a second positioning plate 73. The bottom plate 32 is installed on the machine platform, and the lifting assembly 71 is installed on the side of the bottom plate 32 away from the machine platform, and can move relative to the bottom plate 32 along the X-axis direction of the machine platform. In addition, the first positioning plate 72 is installed on the side of the lifting assembly 71 away from the bottom plate 32, and the second positioning plate 73 is installed on the side of the first positioning plate 72 away from the lifting assembly, and can move relative to the first positioning plate 72 along the Y-axis direction of the machine platform. A fastener 74 is also provided on the second positioning plate 73, and the fastener 74 is used to lock and fix the valve core 1. Among them, the lifting assembly 71 is used to drive the first positioning plate 72 and the second positioning plate 73 to rise and fall.

[0065] It can be understood that when processing the valve core 1, the valve stem 2 can be clamped and fastened by the clamping sleeve 52, so as to avoid relative rotation with the valve core 1 during drilling, and to avoid the hole after the final drilling of the valve core 1 not matching the valve stem 2, thereby improving the use efficiency of the equipment. The edges on both sides of the valve core 1 are fixed to the second positioning plate 73 by fasteners 74, so as to complete the positioning and fixing of the valve core 1.

[0066] Further, the bottom plate 32 is provided with a bar hole 321 extending along the X-axis direction of the machine, and the lifting assembly 71 is slidably installed in the bar hole 321. The drilling device for facilitating replacement of the valve core also includes a first fixing member. When the lifting assembly 71 slides to a preset position relative to the bar hole 321, the first fixing member can detachably fix the lifting assembly 71 to the bottom plate 32; and / or, the first positioning plate 72 is provided with a plurality of first connecting holes 721 arranged at intervals along the Y-axis direction of the machine, and the second positioning plate 73 is provided with a second connecting hole 731. The drilling device for facilitating replacement of the valve core also includes a second fixing member. When the second connecting hole 731 is arranged opposite to any first connecting hole 721, the second fixing member can be sequentially penetrated in the oppositely arranged first connecting hole 721 and the second connecting hole 731 to detachably fix the second positioning plate 73 to the first positioning plate 72. The above-mentioned first fixing member and second fixing member can be screws or bolts. The arrangement of the strip hole 321, the first connection hole 721 and the second connection hole 731 can facilitate the position adjustment of the lifting assembly 71, and also facilitate the position adjustment of the valve core 1 in the X-axis direction and the Y-axis direction of the machine.

[0067] like Figure 4 As shown, the lifting assembly 71 includes a base 711, a support plate 724, a first movable block 714, a second movable block 722, a first fixed block 713, a second fixed block 720, a first connecting rod 715, and a second connecting rod 716. The base 711 is installed on the side of the bottom plate 32 away from the machine, and can move relative to the bottom plate 32 along the X-axis direction of the machine. The support plate 724 is arranged on the side of the base 711 away from the bottom plate 32 and is arranged opposite to the base 711. The first positioning plate 72 is installed on the side of the support plate 724 away from the base 711.

[0068] Further, the first movable block 714 is slidably connected to the base 711 and can reciprocate along a first direction, and the first direction is perpendicular to the X-axis direction of the machine. The second movable block 722 is slidably connected to the support plate 724 and is arranged opposite to the first movable block 714, and can reciprocate along the first direction. The first fixed block 713 is fixedly connected to the base 711 and is located on a side of the base 711 away from the first movable block 714. The second fixed block 720 is fixedly connected to the support plate 724 and is arranged opposite to the first fixed block 713.

[0069] In addition, one end of the first connecting rod 715 is rotatably connected to the first fixed block 713 through the first rotating shaft 717, and the other end of the first connecting rod 715 is rotatably connected to the second movable block 722 through the second rotating shaft 723. One end of the second connecting rod 716 is rotatably connected to the first movable block 714 through the third rotating shaft 718, and the other end of the second connecting rod 716 is rotatably connected to the second fixed block 720 through the fourth rotating shaft 725. The extension direction of the second connecting rod 716 is arranged to intersect with the extension direction of the first connecting rod 715, and the second connecting rod 716 is rotatably connected to the first connecting rod 715 through the fifth rotating shaft 719. Among them, the hinge point of the first connecting rod 715 and the second connecting rod 716 is located in the middle of the first connecting rod 715 and the second connecting rod 716, and the first connecting rod 715 and the second connecting rod 716 are arranged crosswise, and the first rotating shaft 717, the second rotating shaft 723, the third rotating shaft 718, the fourth rotating shaft 725 and the fifth rotating shaft 719 are arranged parallel to each other.

[0070] Further, the base 711 is provided with a first slide groove 7111 extending along the first direction, and the first movable block 714 is slidably installed in the first slide groove 7111 and is restricted from slipping out of the first slide groove 7111; and / or, the support plate 724 is provided with a second slide groove extending along the first direction, and the second movable block 722 is slidably installed in the second slide groove and is restricted from slipping out of the second slide groove.

[0071] The lifting assembly 71 further includes a lap plate 75 and an adjusting member 76. The lap plate 75 is connected to the first movable block 714. The adjusting member 76 includes an operating portion 761 and a transmission rod 762 fixedly connected to the operating portion 761. The transmission rod 762 is passed through the side end of the base 711 and is transmission-connected to the side end of the base 711. One end of the transmission rod 762 away from the operating portion 761 is connected to the lap plate 75. The operating portion 761 can be rotated manually, so that the transmission rod 762 rotates, and the first positioning plate 72 and the second positioning plate 73 are raised or lowered accordingly. The transmission rod 762 is specifically threadedly connected to the side end of the base 711. The number of the lap plates 75 in this embodiment is two.

[0072] It can be understood that when the adjusting and positioning mechanism 7 is used to assist the valve core 1 in drilling, the working steps are as follows:

[0073] 1. Loosen the locking piece 53, expand the clamping sleeve 52, insert one end of the valve stem 2 into the inner wall of the clamping sleeve 52, and then tighten the locking piece 53 to allow the clamping sleeve 52 to fix and clamp the valve stem 2;

[0074] 2. Then the valve core 1 is sleeved on the periphery of the valve stem 2. If the placement height of the valve core 1 is not suitable, the operating part 761 can be rotated so that one end of the transmission rod 762 pushes or pulls the lap plate 75, and the two lap plates 75 move to move the first connecting rod 715 and the second connecting rod 716 at the same time. With the cooperation of other parts of the lifting assembly 71, the valve core 1 can finally reach a suitable working height;

[0075] 3. After the valve core 1 is adjusted to a suitable working height, the valve core 1 is fixedly installed using the fastener 74, thereby pressing and consolidating the edge of the valve core 1 to achieve overall stability during drilling;

[0076] 4. Start the drilling drive motor 62, and let the drilling drive motor 62 drive the drilling head 63 to produce rotational drilling.

[0077] The specific application process of the drill bit device for facilitating valve core replacement is as follows:

[0078] 1. Clamping: According to the type of valve core 1 to be processed and the form of the required processing hole, select a suitable clamping method from the three clamping methods mentioned above, and then clamp and fix the valve stem 2;

[0079] 2. Alignment: Place a measuring block 8 at the positioning hole of the valve stem 2, and use a dial indicator to axially align the drilling head 63 and the positioning hole of the valve stem 2;

[0080] 3. Finding the center: Use the edge finder in conjunction with the machine tool programmable control system to find the center base point of the positioning hole of the valve stem 2. When the machine head speed is about 500, let the edge finder slowly approach the measuring block 8. When you see the edge finder swing or alarm, the edge finding is successful. Operate the machine tool programming system to remember the current coordinates. Similarly, find the four-point coordinates of the X-axis and Y-axis directions of the measuring block 8, and automatically calculate the center point of the measuring block 8, that is, complete the centering of the positioning hole of the valve stem 2;

[0081] 4. Tightening: Install the valve core 1 to the valve stem 2, and tighten the valve core 1 and the valve stem 2 according to the torque in the valve assembly procedure;

[0082] 5. Drilling: Before drilling the installed valve core and valve stem assembly, the positioning hole of valve stem 2 should be tested or drilled to verify the tool setting accuracy. First, the parts to be processed are 3D modeled, and then the cutting path planning, tool selection, processing parameter setting and other operations are performed to generate G code, upload the G code to the controller, and set the processing program, including tool length compensation, workpiece coordinate system setting, tool radius compensation and other operations. Import the programmed program into the computer, adjust the chip fluid outlet direction, and start drilling;

[0083] 6. End: Use the corresponding reamer to clean the positioning hole of valve stem 2, knock the pin into the positioning hole of valve stem 2, and complete the drilling.

[0084] In summary, the beneficial effects of the drill bit device for facilitating valve core replacement are as follows:

[0085] 1. The drilling device for facilitating replacement of the valve core is provided with a rotary drive mechanism 4, which can facilitate the vertical alignment of the positioning hole of the valve stem 2 and the drilling mechanism 6, and facilitate alignment and centering;

[0086] 2. By setting the clamping mechanism 5, the valve stem 2 will not rotate during the entire drilling process, ensuring the stability during the entire drilling process, effectively avoiding the problem of inaccurate drilling position, and greatly improving the use efficiency of the equipment;

[0087] 3. By setting the adjustment positioning mechanism 7, the drilling operation height of the valve core 1 can be conveniently adjusted to ensure that the valve stem 2 can be better fixed and meet the better drilling requirements;

[0088] 4. By setting up the alignment mechanism, it can be ensured that the newly opened hole on the valve core 1 is coaxial with the hole of the old valve stem 2, thereby improving the processing accuracy;

[0089] 5. The overall structure of the drilling device for facilitating replacement of the valve core is simple, and the operation method is clear and convenient. It can more easily realize the positioning and adjustment requirements of the lateral shift and flipping of the valve stem assembly of the valve core to be processed. It can be suitable for a variety of different types of valve cores 1 and different processing hole methods, thereby improving production efficiency and facilitating replacement of the valve core.

[0090] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A drilling device for facilitating replacement of valve core, characterized in that: include: Machine; A drilling mechanism (6) is movably mounted on the machine platform and is used to drill holes in the valve core (1); A rotary drive mechanism (4) is mounted on the machine platform, and the central axis of the output end of the rotary drive mechanism (4) is arranged perpendicular to the central axis of the output end of the drilling mechanism (6); A clamping mechanism (5) is used to clamp the valve stem (2); the clamping mechanism (5) is connected to the output end of the rotary drive mechanism (4) and can rotate around a first axis under the drive of the rotary drive mechanism (4); the first axis is parallel to the central axis of the output end of the rotary drive mechanism (4).

2. The drilling device for facilitating valve core replacement according to claim 1, characterized in that: The clamping mechanism (5) comprises a first clamping connection member (51), a clamping sleeve (52) and a plurality of locking members (53); The first clamping connection member (51) is connected to the output end of the rotary drive mechanism (4), the clamping sleeve (52) is installed on a side of the first clamping connection member (51) away from the rotary drive mechanism (4), and has a clamping cavity for clamping the valve stem (2), and the extension direction of the clamping cavity is parallel to the first axis; The plurality of locking members (53) are arranged at intervals along the circumference of the clamping sleeve (52), and the plurality of locking members (53) are threadedly connected to the clamping sleeve (52), and are used to lock the valve stem (2) into the clamping cavity.

3. The drilling device for facilitating valve core replacement according to claim 2, characterized in that: The clamping mechanism (5) further comprises an insertion rod, a second clamping connector (55) and a fastener (56); The insert rod is installed in the clamping cavity of the clamping sleeve (52), the second clamping connector (55) is arranged on the side of the first clamping connector (51) away from the rotating drive mechanism (4), and is connected to the insert rod, the fastener (56) is installed on the second clamping connector (55), and the fastener (56) is provided with a clamping hole (561) for installing the valve stem (2), and the central axis of the clamping hole (561) is arranged to intersect with the first axis.

4. The drilling device for facilitating valve core replacement according to claim 1, characterized in that: The drilling device for facilitating replacement of the valve core comprises an adjusting and positioning mechanism (7), wherein the adjusting and positioning mechanism (7) comprises a bottom plate (32), a lifting assembly (71), a first positioning plate (72) and a second positioning plate (73); The bottom plate (32) is mounted on the machine platform; the lifting assembly (71) is mounted on a side of the bottom plate (32) away from the machine platform, and is capable of moving relative to the bottom plate (32) along the X-axis direction of the machine platform; the first positioning plate (72) is mounted on a side of the lifting assembly (71) away from the bottom plate (32); the second positioning plate (73) is mounted on a side of the first positioning plate (72) away from the lifting assembly, and is capable of moving relative to the first positioning plate (72) along the Y-axis direction of the machine platform; The second positioning plate (73) is also provided with a fastener (74), and the fastener (74) is used to lock and fix the valve core (1); Wherein, the lifting assembly (71) is used to drive the first positioning plate (72) and the second positioning plate (73) to rise and fall.

5. The drilling device for facilitating valve core replacement according to claim 4, characterized in that: The bottom plate (32) is provided with a strip hole (321) extending along the X-axis direction of the machine, and the lifting assembly (71) is slidably mounted on the strip hole (321). The drilling device for facilitating replacement of the valve core further comprises a first fixing member, and when the lifting assembly (71) slides to a preset position relative to the strip hole (321), the first fixing member can detachably fix the lifting assembly (71) to the bottom plate (32); And / or, the first positioning plate (72) is provided with a plurality of first connecting holes (721) extending therethrough and arranged at intervals along the Y-axis direction of the machine, and the second positioning plate (73) is provided with a second connecting hole (731) extending therethrough, and the drilling device for facilitating replacement of the valve core further comprises a second fixing member, and when the second connecting hole (731) is arranged opposite to any of the first connecting holes (721), the second fixing member can be sequentially passed through the oppositely arranged first connecting hole (721) and the second connecting hole (731) to detachably fix the second positioning plate (73) to the first positioning plate (72).

6. The drilling device for facilitating valve core replacement according to claim 4, characterized in that: The lifting assembly (71) comprises: A base (711) is mounted on a side of the bottom plate (32) away from the machine platform and is movable relative to the bottom plate (32) along the X-axis direction of the machine platform; A support plate (724) is disposed on a side of the base (711) away from the bottom plate (32) and is arranged opposite to the base (711); and the first positioning plate (72) is installed on a side of the support plate (724) away from the base (711); A first movable block (714) is slidably connected to the base (711) and is capable of reciprocating along a first direction, wherein the first direction is perpendicular to the X-axis direction of the machine platform; A second movable block (722) is slidably connected to the support plate (724) and is disposed opposite to the first movable block (714), and is capable of reciprocating along the first direction; A first fixed block (713) fixedly connected to the base (711) and located on a side of the base (711) away from the first movable block (714); A second fixing block (720) fixedly connected to the support plate (724) and arranged opposite to the first fixing block (713); A first connecting rod (715), one end of the first connecting rod (715) is rotatably connected to the first fixed block (713) via a first rotating shaft (717), and the other end of the first connecting rod (715) is rotatably connected to the second movable block (722) via a second rotating shaft (723); a second connecting rod (716), one end of the second connecting rod (716) being rotatably connected to the first movable block (714) via a third rotating shaft (718), the other end of the second connecting rod (716) being rotatably connected to the second fixed block (720) via a fourth rotating shaft (725), the extension direction of the second connecting rod (716) being arranged to intersect with the extension direction of the first connecting rod (715), and the second connecting rod (716) being rotatably connected to the first connecting rod (715) via a fifth rotating shaft (719); Wherein, the first rotating shaft (717), the second rotating shaft (723), the third rotating shaft (718), the fourth rotating shaft (725) and the fifth rotating shaft (719) are all arranged parallel to each other.

7. The drilling device for facilitating valve core replacement according to claim 6, characterized in that: The base (711) is provided with a first slide groove (7111) extending along the first direction, and the first movable block (714) is slidably mounted in the first slide groove (7111) and is restricted from escaping from the first slide groove (7111); And / or, the support plate (724) is provided with a second slide groove extending along the first direction, and the second movable block (722) is slidably mounted in the second slide groove and is restricted from escaping from the second slide groove.

8. The drilling device for facilitating valve core replacement according to claim 6, characterized in that: The lifting assembly (71) also includes a lap plate (75) and an adjusting member (76), wherein the lap plate (75) is connected to the first movable block (714), and the adjusting member (76) includes an operating portion (761) and a transmission rod (762) fixedly connected to the operating portion (761), wherein the transmission rod (762) is passed through a side end portion of the base (711) and is transmission-connected to the side end portion of the base (711), and one end of the transmission rod (762) away from the operating portion (761) is connected to the lap plate (75).

9. The drilling device for facilitating replacement of valve core according to any one of claims 1 to 8, characterized in that: The drilling device for facilitating replacement of the valve core also includes an alignment mechanism, which includes a measuring block (8) and an edge finder; The measuring block (8) comprises a measuring body (81) and a needle gauge (82), wherein the needle gauge (82) is connected to the center position of one side of the measuring body (81), the measuring body (81) is mounted on the outer periphery of the valve stem (2), and the needle gauge (82) is inserted into the positioning hole of the valve stem (2); The edge finder is installed on the drilling mechanism (6), and is used to cooperate with the measuring block (8) to determine the position of the positioning hole of the valve stem (2).

10. The drilling device for facilitating replacement of valve core according to any one of claims 1 to 8, characterized in that: The drilling mechanism (6) comprises a support frame (61), a drilling drive motor (62) and a drilling head (63); The support frame (61) is mounted on the machine platform and is movably connected to the machine platform. The drilling drive motor (62) is mounted on the support frame (61). The drilling drive motor (62) is drivingly connected to the drilling head (63).

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