Adjustable positioning and clamping device for machining inner groove of threaded cartridge valve connecting sleeve

Abstract

According to the adjustable positioning and clamping device for machining the inner groove of the threaded cartridge valve connecting sleeve, the inner arcs of the fixed block and the follow-up block are optimally attached to the positioning and clamping outer circle of the threaded connecting sleeve, and the material hardness of the fixed block and the follow-up block is lower than that of the threaded connecting sleeve, so that the adjustable positioning and clamping device can adapt to the threaded connecting sleeves of different grades; only the fixed block and the follow-up block need to be replaced, secondary clamping damage cannot be caused, the universality is good, and the maintenance cost is low; the outer circle of the threaded connection sleeve and other matched cavities with the position precision requirement are obtained through one-time machining in the previous procedure, the outer end plane of the threaded connection sleeve and other matched cavities with the position precision requirement are also obtained through one-time machining in the previous procedure, and the position precision of the threaded connection sleeve and the position precision of the matched cavities are both guaranteed by a machine tool. During secondary clamping, the outer circle is completely attached, positioned and clamped, and positioning errors and punching precision errors caused by heavy cutting force do not exist; the relative position of the fixed block after the position precision is adjusted is kept still, so that the consistency of batch production precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology in machining, and in particular to a punching positioning and clamping device, specifically an adjustable positioning and clamping device suitable for punching the inner groove of a threaded cartridge valve connecting sleeve. Background Technology

[0002] In threaded cartridge hydraulic valves, different grades are classified according to flow rate. The external dimensions of the hydraulic valves of different grades increase with the increase of flow rate. Threaded cartridge balance valves are available in multiple grades from 60L to 480L. The threaded connecting sleeves of different grades have similar structures, and all threaded connecting sleeves of different grades and external dimensions have multiple limiting grooves that need to be machined. These limiting grooves have positional accuracy requirements with the mating cavities of related assemblies. Due to structural limitations, they can only be machined by punching. Because the punching force is large, it is not suitable to machine directly on a lathe. Instead, they must be punched using a hydraulic press after secondary clamping. The fixture for secondary positioning and clamping needs to meet several requirements. First, the secondary positioning and clamping punching should not cause significant damage to the threaded connecting sleeve. Second, the fixture used for secondary positioning and clamping must be versatile to accommodate threaded connecting sleeves with different grades and dimensions. Third, the fixture used for secondary positioning and clamping must ensure the positional accuracy of the limiting groove after punching and the mating cavity of the previous process. Finally, the fixture used for secondary positioning and clamping must ensure the efficiency and consistency of mass production accuracy. Existing fixtures cannot simultaneously meet the above technical requirements, so it is urgent to design a positioning and clamping fixture that can simultaneously meet the above requirements. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an adjustable positioning and clamping device that can be used for punching the inner groove of a threaded cartridge valve connecting sleeve, so as to overcome the shortcomings in the above-mentioned background technology.

[0004] The technical problem solved by this utility model is achieved by the following technical solution:

[0005] An adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve includes a positioning and clamping part, a position adjustment part, a clamping power part, and a machine tool base. The position adjustment part is mounted on the machine tool base, the positioning and clamping part is mounted on the position adjustment part, and the clamping power part is mounted on the positioning and clamping part.

[0006] In this utility model, the position adjustment part includes a first handle, a first slide plate, a second handle, and a second slide plate. The first handle is disposed on one side of the first slide plate, and the second handle is disposed on one side of the second slide plate. The first slide plate can be slidably disposed on the second slide plate by adjusting the first handle. Stopping the adjustment of the first handle can lock the relative position of the first slide plate and the second slide plate. The second slide plate can be slidably disposed on the machine tool base by adjusting the second handle. Stopping the adjustment of the second handle can lock the relative position of the second slide plate and the machine tool base.

[0007] In this utility model, the positioning and clamping part includes a first bracket, a first guide rail, a second guide rail, a fixed frame, a follower frame, a fixed block, a follower block, a sliding bracket, a cover plate, a power head, a second bracket, and a positioning block;

[0008] The first bracket and the second bracket are respectively fixedly mounted on the first slide plate. One end of the first guide rail is fixedly connected to the first bracket, and the other end of the first guide rail is fixedly connected to the second bracket. One end of the second guide rail is fixedly connected to the first bracket, and the other end of the second guide rail is fixedly connected to the second bracket. The first guide rail and the second guide rail are arranged parallel to each other.

[0009] One end of the sliding bracket is slidably mounted on the first guide rail, and the other end of the sliding bracket is slidably mounted on the second guide rail. The follower frame is fixedly mounted on the sliding bracket, and the fixed frame and the follower frame are disposed between the first guide rail and the second guide rail.

[0010] The fixed block and the fixed frame are detachably and fixedly connected, the follower block and the follower frame are detachably and fixedly connected, the positioning block is located on the first slide plate, and the positioning block is set between the fixed block and the follower block.

[0011] In this utility model, a concave arc groove is provided on the opposite side of the fixed frame and the follower frame, and a concave arc groove is provided on the opposite side of the follower frame and the fixed frame.

[0012] The fixed block is a circular arc ring less than half the length of the fixed block, and the follower block is a circular arc ring less than half the length of the fixed block. The fixed block is connected and fixed to the concave circular arc groove of the fixed frame through the outer circular arc, and the follower block is connected and fixed to the concave circular arc groove of the follower frame through the outer circular arc.

[0013] The inner arc diameters of the fixed block, the inner arc diameter of the follower block, and the outer arc diameter of the clamped threaded connecting sleeve are the same. There is a gap between the fixed block and the follower block, and there is also a gap between the fixed frame and the follower frame.

[0014] By positioning the outer diameter of the threaded connection sleeve according to the different flow rates, and setting the corresponding inner diameter of the fixed block and follower block for replacement, the positioning and fastening needs of threaded connection sleeves of different sizes can be met without replacing the entire tooling fixture.

[0015] The fixed block and follower block are made of materials with a hardness lower than that of the threaded connecting sleeve. The inner arc of the fixed block and follower block is modified according to the actual size of the outer circle of the mass-produced threaded connecting sleeve to maximize the clamping fit of the arc surface, thereby greatly reducing the clamping stress. While ensuring the clamping force required for clamping, it avoids leaving clamping marks that could cause damage during secondary clamping.

[0016] The sum of the height of the positioning block and the outer diameter of the threaded connecting sleeve being clamped is greater than the height of the fixed block. The height of the fixed block and the height of the follower block are the same. The outer contour of the positioning block is smaller than the cavity contour formed by the fixed block and the follower block.

[0017] The power head is movably mounted on the sliding bracket, and the power head and the sliding bracket are connected by a spherical surface. The sliding bracket is provided with a cover plate to limit the relative position of the power head and the sliding bracket. The cover plate and the sliding bracket are detachably and fixedly connected.

[0018] In this utility model, the clamping power part includes a power cylinder body and a power cylinder rod. Under the control of an external driving force, the power cylinder rod is reciprocatingly disposed in the power cylinder body, and the end of the power cylinder rod extending out of the power cylinder body is fixedly connected to the power head.

[0019] In this invention, the reciprocating power cylinder rod drives the sliding bracket via the power head, and the sliding bracket drives the follower block to reciprocate via the follower frame. When the follower block is far away from the fixed block, the outer end plane of the threaded connecting sleeve is placed on the positioning block, and the threaded connecting sleeve is located in the cavity formed by the inner arc of the follower block and the inner arc of the fixed block. The clamped outer circle of the threaded connecting sleeve is positioned in contact with the inner arc of the fixed block. The clamping power part drives the follower block to move closer to the threaded connecting sleeve, so that the inner arc of the follower block is in contact with the clamped outer circle of the threaded connecting sleeve. In this way, the fixture completes the clamping of the threaded connecting sleeve. Positioning and clamping of the sleeve: By adjusting the first handle and the second handle, the first slide plate and the second slide plate are moved to adjust the threaded connecting sleeve to a coaxial state with the punching tool and lock it in a fixed position, thereby completing the punching process of the inner groove of the threaded connecting sleeve. After the processing is completed, the clamping power unit drives the follower block away from the threaded connecting sleeve and removes the threaded connecting sleeve. Then, another threaded connecting sleeve to be processed is installed and positioned and clamped. Since coaxial adjustment has been performed before, subsequent processing does not require repeated adjustment. After positioning and clamping, punching is performed directly. This loading and unloading process is repeated to complete the punching process.

[0020] Beneficial effects: In this utility model, the inner arcs of the fixed block and the follower block are optimally fitted with the outer circle of the threaded connecting sleeve for positioning and clamping. Furthermore, the material hardness of the fixed block and the follower block is lower than that of the threaded connecting sleeve, ensuring that secondary positioning and clamping is achieved without causing damage. For different grades of threaded connecting sleeves, only the fixed block and the follower block need to be replaced, without replacing the entire clamping device, resulting in good versatility. Even if the fixed block and the follower block wear out, the replacement and maintenance costs are extremely low. The outer circle of the threaded connecting sleeve used for positioning and clamping, along with other mating cavities requiring positional accuracy, are obtained through a single machining process in the preceding stage, ensuring the positional accuracy of both. The machine tool itself guarantees that the secondary clamping uses the outer circle to fully fit and position the clamping, eliminating positioning errors. Furthermore, the positioning block used to bear the punching force supports the outer end plane of the threaded connecting sleeve. This outer end plane, along with other mating cavities requiring positional accuracy, is also obtained through a single machining process in the previous step. The positional accuracy of both is also guaranteed by the machine tool itself. Thus, the two high-precision positioning systems, which serve as mutual references, prevent punching accuracy errors caused by positioning and heavy chipping forces during punching. After adjusting the positional accuracy of the positioning threaded connecting sleeve relative to the punching tool, the fixing block remains stationary, thereby ensuring the consistency of accuracy in batch production. Attached Figure Description

[0021] Figure 1 This is a front view of a preferred embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional view of a preferred embodiment of the present invention.

[0023] Attached diagram labels: 100, positioning and clamping part; 200, position adjustment part; 300, clamping power part; 400, machine tool base.

[0024] 101. First bracket; 102. First guide rail; 103. Second guide rail; 104. Fixed bracket; 105. Follower bracket; 106. Fixed block; 107. Follower block; 108. Sliding bracket; 109. Cover plate; 110. Power head; 111. Second bracket; 112. Positioning block.

[0025] 201. First handle; 202. First skateboard; 203. Second handle; 204. Second skateboard;

[0026] 301. Power cylinder block; 302. Power cylinder rod. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0028] See Figures 1-2An adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve includes a positioning and clamping part 100, a position adjustment part 200, a clamping power part 300, and a machine tool base 400. The position adjustment part 200 is mounted on the machine tool base 400, the positioning and clamping part 100 is mounted on the position adjustment part 200, and the clamping power part 300 is mounted on the positioning and clamping part 100.

[0029] In this embodiment, the position adjustment part 200 includes a first handle 201, a first slide plate 202, a second handle 203, and a second slide plate 204. The first handle 201 is disposed on one side of the first slide plate 202, and the second handle 203 is disposed on one side of the second slide plate 204. The first slide plate 202 can be slidably disposed on the second slide plate 204 by adjusting the first handle 201, and the second slide plate 204 can be slidably disposed on the machine tool base 400 by adjusting the second handle 203.

[0030] In this embodiment, the positioning and clamping part 100 includes a first bracket 101, a first guide rail 102, a second guide rail 103, a fixed frame 104, a follower frame 105, a fixed block 106, a follower block 107, a sliding bracket 108, a cover plate 109, a power head 110, a second bracket 111, and a positioning block 112.

[0031] The first bracket 101 and the second bracket 111 are respectively fixedly mounted on the first slide plate 202. One end of the first guide rail 102 is fixedly connected to the first bracket 101, and the other end of the first guide rail 102 is fixedly connected to the second bracket 111. One end of the second guide rail 103 is fixedly connected to the first bracket 101, and the other end of the second guide rail 103 is fixedly connected to the second bracket 111. The first guide rail 102 and the second guide rail 103 are arranged parallel to each other.

[0032] One end of the sliding bracket 108 is slidably mounted on the first guide rail 102, and the other end of the sliding bracket 108 is slidably mounted on the second guide rail 103. The follower frame 105 is fixedly mounted on the sliding bracket 108, and the fixed frame 104 and the follower frame 105 are disposed between the first guide rail 102 and the second guide rail 103.

[0033] The fixed block 106 is detachably and fixedly connected to the fixed frame 104, the follower block 107 is detachably and fixedly connected to the follower frame 105, and the positioning block 112 is located on the first slide plate 202 and is positioned between the fixed block 106 and the follower block 107.

[0034] In this embodiment, concave arc grooves are provided on the opposite sides of the fixed frame 104 and the follower frame 105, and concave arc grooves are provided on the opposite sides of the follower frame 105 and the fixed frame 104.

[0035] The fixed block 106 is a circular arc ring less than half the length of the fixed block 106, and the follower block 107 is a circular arc ring less than half the length of the fixed block 106. The fixed block 106 is connected and fixed to the concave circular arc groove of the fixed frame 104 through the outer circular arc, and the follower block 107 is connected and fixed to the concave circular arc groove of the follower frame 105 through the outer circular arc.

[0036] The inner arc diameters of the fixed block 106, the inner arc diameter of the follower block 107, and the outer arc diameter of the clamped threaded connecting sleeve are the same. A gap is provided between the fixed block 106 and the follower block 107, and a gap is also provided between the fixed frame 104 and the follower frame 105.

[0037] Based on the outer diameter of the threaded connecting sleeve with different flow rates, the fixed block 106 and follower block 107 with corresponding inner arc diameter are set for replacement, which can meet the positioning and fastening needs of threaded connecting sleeves of different sizes without replacing the entire tooling fixture.

[0038] The fixed block 106 and the follower block 107 are made of materials with a hardness lower than that of the threaded connecting sleeve. The inner arc of the fixed block 106 and the follower block 107 is modified according to the actual size of the outer circle of the mass-produced threaded connecting sleeve to maximize the clamping fit of the arc surface, thereby greatly reducing the clamping stress. While ensuring the clamping force required for clamping, it avoids leaving clamping marks and causing damage due to secondary clamping.

[0039] The sum of the height dimension of the positioning block 112 and the outer circle length dimension of the threaded connecting sleeve being clamped is greater than the height dimension of the fixing block 106. The height dimension of the fixing block 106 and the height dimension of the follower block 107 are the same. The outer contour of the positioning block 112 is smaller than the cavity contour formed by the fixing block 106 and the follower block 107.

[0040] The power head 110 is movably mounted on the sliding bracket 108. The power head 110 and the sliding bracket 108 are connected by a spherical surface. The sliding bracket 108 is provided with a cover plate 109 for limiting the relative position of the power head 110 and the sliding bracket 108. The cover plate 109 and the sliding bracket 108 are detachably and fixedly connected.

[0041] In this embodiment, the clamping power unit 300 includes a power cylinder body 301 and a power cylinder rod 302. Under the control of an external driving force, the power cylinder rod 302 is reciprocatingly disposed in the power cylinder body 301, and the end of the power cylinder rod 302 extending out of the power cylinder body 301 is fixedly connected to the power head 110.

[0042] In this embodiment, the reciprocating power cylinder rod 302 drives the sliding bracket 108 via the power head 110, and the sliding bracket 108 drives the follower block 107 to reciprocate via the follower frame 105. When the follower block 107 is in a state of being far away from the fixed block 106, the outer end plane of the threaded connecting sleeve is placed on the positioning block 112, and the threaded connecting sleeve is located in the cavity formed by the inner arc of the follower block 107 and the inner arc of the fixed block 106. The clamped outer circle of the threaded connecting sleeve is fitted and positioned with the inner arc of the fixed block 106. The clamping power part 300 drives the follower block 107 to move closer to the threaded connecting sleeve, thereby making the inner arc of the follower block 107 fit with the threaded connecting sleeve. The outer circle is clamped and fitted, thus the fixture completes the positioning and clamping of the threaded connecting sleeve. By adjusting the first handle 201 and the second handle 203 to move the first slide plate 202 and the second slide plate 204, the threaded connecting sleeve is adjusted to be coaxial with the punching tool, thereby completing the punching process of the inner groove of the threaded connecting sleeve. After the processing is completed, the clamping power unit 300 drives the follower block 107 away from the threaded connecting sleeve and removes the threaded connecting sleeve. Then another threaded connecting sleeve to be processed is installed and positioned and clamped. Since the coaxial adjustment has been performed before, the subsequent processing does not require repeated adjustment. After positioning and clamping, the punching process is performed directly. This process of loading and unloading is repeated to perform the punching process.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve, comprising a positioning and clamping part, a position adjustment part, a clamping power part, and a machine tool base, wherein, The position adjustment section is mounted on the machine tool base, the positioning and clamping section is mounted on the position adjustment section, and the clamping power section is mounted on the positioning and clamping section. The positioning and clamping section includes a first bracket, a first guide rail, a second guide rail, a fixed frame, a follower frame, a fixed block, a follower block, a sliding bracket, a cover plate, a power head, a second bracket, and a positioning block. The first and second brackets are respectively fixedly mounted on the first slide plate. One end of the first guide rail is fixedly connected to the first bracket, and the other end is fixedly connected to the second bracket. One end of the second guide rail is fixedly connected to the first bracket, and the other end is fixedly connected to the second bracket. The first and second guide rails are arranged parallel to each other. One end of the sliding bracket is slidably mounted on the first guide rail, and the other end is slidably mounted on the second guide rail. The follower frame is fixedly mounted on the sliding bracket. The fixed frame is fixedly connected to the first bracket. The fixed frame and the follower frame are positioned between the first and second guide rails. The fixed block is detachably fixedly connected to the fixed frame, and the follower block is detachably fixedly connected to the follower frame. The fixed connection is removed, the positioning block is located on the first sliding plate, and the positioning block is positioned between the fixed block and the follower block. The power head is movably mounted on the sliding bracket, and the power head and the sliding bracket are connected by a spherical surface. The sliding bracket is provided with a cover plate for limiting the relative position of the power head and the sliding bracket. The cover plate and the sliding bracket are detachably fixedly connected. The feature is that the fixed frame and the follower frame are provided with concave arc grooves on the opposite sides, and the follower frame and the fixed frame are provided with concave arc grooves on the opposite sides. The fixed block is less than half of an arc. The ring body has a follower block that is less than half the size of a circular arc ring. The fixed block is fixed by connecting the outer arc to the concave arc groove of the fixed frame. The follower block is fixed by connecting the outer arc to the concave arc groove of the follower frame. The inner arc diameters of the fixed block, the follower block, and the outer circle of the clamped threaded connecting sleeve are the same. The clamped outer circle of the threaded connecting sleeve fits against the inner arc of the fixed block and the inner arc of the follower block, respectively. There is a gap between the fixed block and the follower block, and there is also a gap between the fixed frame and the follower frame.

2. The adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve according to claim 1, characterized in that, The position adjustment part includes a first handle, a first slide plate, a second handle, and a second slide plate. The first handle is located on one side of the first slide plate, and the second handle is located on one side of the second slide plate. The first slide plate can be slidably mounted on the second slide plate by adjusting the first handle, and the second slide plate can be slidably mounted on the machine tool base by adjusting the second handle.

3. The adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve according to claim 1, characterized in that, The material hardness of the fixed block and the follower block is lower than that of the threaded connection sleeve.

4. The adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve according to claim 1, characterized in that, The height of the fixed block and the height of the follower block are the same. The outer contour of the positioning block is smaller than the cavity contour formed by the fixed block and the follower block. The sum of the height of the positioning block and the outer circle length of the threaded connecting sleeve being clamped is greater than the height of the fixed block.

5. The adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve according to claim 1, characterized in that, The clamping power unit includes a power cylinder body and a power cylinder rod. The power cylinder rod is reciprocating within the power cylinder body under the control of an external driving force, and the end of the power cylinder rod extending out of the power cylinder body is fixedly connected to the power head.

6. The adjustable positioning and clamping device for machining the inner groove of a threaded cartridge valve connecting sleeve according to claim 1, characterized in that, The outer end face of the threaded connection sleeve is placed on the positioning block, and the threaded connection sleeve is located in the cavity formed by the inner arc of the follower block and the inner arc of the fixed block.

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