Clamping device for milling of dovetail groove of plug valve core

Abstract

The utility model relates to the technical field of plug valve core processing, especially to a clamping device for plug valve core dovetail groove milling machine processing, which comprises a fixed base, two clamping support plates and two pressure plates, the upper surface of the fixed base is beveled, the fixed base can be detachably arranged on the milling machine processing center workbench surface through a first connecting structure, at least three groups of first connecting thread grooves are arranged on the upper surface of the fixed base along the length direction of the fixed base, the two clamping support plates are detachably arranged between any two groups of first connecting thread grooves of the fixed base through one-to-one corresponding connection of connecting screws, first threaded holes and the first connecting thread grooves, that is, any two groups of first connecting thread grooves can be used for clamping and processing of plug valve core dovetail grooves of one specification, length, thereby significantly improving the use range of the clamping device and reducing the cost of plug valve core dovetail groove milling machine processing.

Description

Technical Field

[0001] This utility model relates to the field of plug valve core processing technology, and in particular to a clamping device for milling dovetail grooves of plug valve cores on a milling machine. Background Technology

[0002] Currently, the clamping device for milling dovetail grooves of plug valve cores includes a fixed base, two clamping support plates, and two pressure plates. The upper surface of the fixed base is inclined and has two sets of connecting threaded grooves. The fixed base is set on the worktable of the milling machine machining center through a first connecting structure. Connecting ears are provided on both sides of the clamping support plates, and threaded through holes are provided on the connecting ears. The upper surface of the clamping support plates is provided with V-shaped positioning grooves. The pressure plates correspond one-to-one with the clamping support plates. The pressure plates are detachably set on the clamping support plates through a second connecting structure, and a clamping cavity is formed between the corresponding clamping support plates and pressure plates. When machining the dovetail groove of the plug valve core, firstly, the fixed base is fixed on the worktable of the milling machine machining center through the first connecting structure; then, the connecting screws, threaded through holes, and connecting threaded grooves are connected one by one to fix the two clamping support plates on the fixed base at intervals; finally, the valve shafts at both ends of the plug valve core are installed in the V-shaped positioning grooves of the clamping support plates, and the valve shafts are fixed through the second connecting structure and the pressure plate, thereby completing the clamping work for milling the dovetail groove of the plug valve core.

[0003] Because the upper surface of the fixed base is only provided with two sets of connecting threaded grooves, each clamping device is only suitable for clamping and processing dovetail grooves of plug valve cores of one specification and length. The clamping device has a narrow range of applications, which increases the cost of milling dovetail grooves of plug valve cores. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a clamping device with a wide range of applications for milling dovetail grooves of plug valve cores.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a clamping device for milling dovetail grooves of plug valve cores, including a fixed base, two clamping support plates and two pressure plates. The upper surface of the fixed base is an inclined surface. The fixed base can be detachably mounted on the worktable of the milling machine machining center through a first connecting structure. The two sides of the clamping support plate are respectively provided with second connecting ears, and the second connecting ears are provided with first threaded through holes. The upper surface of the clamping support plate is provided with a V-shaped positioning groove. The pressure plate corresponds to the clamping support plate one by one. The pressure plate is detachably mounted on the clamping support plate through the second connecting structure and a clamping cavity is formed between the corresponding clamping support plate and the pressure plate. Along the length direction of the fixed base, the upper surface of the fixed base is provided with at least three sets of first connecting thread grooves at intervals. One set of first connecting thread grooves includes two first connecting thread grooves arranged side by side along the width direction of the fixed base. The connecting screw, the first threaded through hole and the first connecting thread groove are connected one by one to detachably mount the two clamping support plates between any two sets of first connecting thread grooves of the fixed base. A connecting and positioning structure is provided between the clamping support plate and the fixed base.

[0006] Furthermore, the connecting positioning structure includes a first positioning groove arranged along the length direction of the fixed base and a first positioning protrusion arranged at the bottom of the clamping support plate, with the first positioning protrusion matched and arranged in the first positioning groove.

[0007] Furthermore, the connecting positioning structure includes a second positioning protrusion arranged along the length direction of the fixed base and a second positioning groove arranged at the bottom of the clamping support plate, with the second positioning protrusion matched and arranged in the second positioning groove.

[0008] Furthermore, the fixed base is provided with first connecting ears on both sides. The first connecting structure includes a connecting through groove, a T-slot bolt and a fixing nut on the first connecting ear. The T-slot bolt can be fixedly set on the worktable of the milling machine machining center. The T-slot bolt passes through the connecting through groove and is connected to the fixing nut.

[0009] Furthermore, the fixed base is provided with at least one weight-reducing groove.

[0010] Furthermore, the second connection structure includes a double-ended stud, a clamping nut, a second connecting threaded groove provided on the top of the clamping support plate, and a second threaded through hole provided on the pressure plate. One end of the double-ended stud is provided in the second connecting threaded groove, and the other end of the double-ended stud passes through the second threaded through hole and is connected to the clamping nut.

[0011] Furthermore, it also includes an auxiliary wedge-shaped fixing block, which can be matched and locked between the fixed base and the valve core of the plug valve.

[0012] Furthermore, weight-reducing placement grooves are provided on both sides of the auxiliary wedge-shaped fixing block.

[0013] Furthermore, the clamping support plate is provided with a fixed threaded through hole and includes a fixing screw. The fixing screw is matched and passes through the fixed threaded through hole, and the auxiliary wedge-shaped fixing block abuts against the fixing screw.

[0014] The beneficial effects of this utility model are as follows: By providing at least three sets of first connecting threaded grooves at intervals along the length of the fixed base on its upper surface, and connecting screws, first threaded through holes, and first connecting threaded grooves in a one-to-one correspondence, two clamping support plates can be detachably mounted between any two sets of first connecting threaded grooves on the fixed base. This means that any two sets of first connecting threaded grooves can be used for clamping and machining dovetail grooves of plug valve cores of a specific specification and length, thereby significantly improving the application range of the clamping device and reducing the cost of milling dovetail grooves of plug valve cores. Furthermore, this utility model provides a connecting positioning structure between the clamping support plate and the fixed base. This connecting positioning structure plays a connecting and positioning role during the installation of the clamping support plate, effectively improving the installation efficiency and effect of the clamping support plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the valve core of a plug valve; Figure 2 This is a schematic diagram of the structure of a plug valve core during milling. Figure 3 This is a schematic diagram of the front structure of the fixed base; Figure 4 This is a schematic diagram of the back structure of the fixed base; Figure 5 This is a schematic diagram of the structure for mounting the support plate; Figure 6 This is a structural diagram of the pressure plate; Figure 7 This is a schematic diagram of the auxiliary wedge-shaped fixing block; The components are labeled as follows: fixed base 1, first connecting thread groove 11, first positioning groove 12, first connecting ear 13, connecting through groove 14, weight reduction groove 15, clamping support plate 2, second connecting ear 21, first threaded through hole 22, V-shaped positioning groove 23, first positioning protrusion 24, second connecting thread groove 25, fixed threaded through hole 26, pressure plate 3, second threaded through hole 31, first connecting structure 4, T-slot bolt 41, fixing nut 42, milling machine machining center worktable 5, connecting screw 6, second connecting structure 7, double-ended stud 71, clamping nut 72, auxiliary wedge fixing block 8, weight reduction placement groove 81, fixing screw 9, plug valve core 10. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 2 to 7 As shown, the present invention relates to a clamping device for milling dovetail grooves of plug valve cores, comprising a fixed base 1, two clamping support plates 2, and two pressure plates 3. The upper surface of the fixed base 1 is inclined, and the fixed base 1 can be detachably mounted on the worktable 5 of the milling machine machining center via a first connecting structure 4. Second connecting ears 21 are respectively provided on both sides of the clamping support plates 2, and first threaded through holes 22 are provided on the second connecting ears 21. A V-shaped positioning groove 23 is provided on the upper surface of the clamping support plates 2. The pressure plates 3 correspond one-to-one with the clamping support plates 2, and the pressure plates 3 are connected via the second connecting structure 4. Structure 7 is detachably mounted on clamping support plate 2 and forms a clamping cavity between the corresponding clamping support plate 2 and pressure plate 3. Along the length direction of fixed base 1, at least three sets of first connecting thread grooves 11 are provided at intervals on the upper surface of fixed base 1. Each set of first connecting thread grooves 11 includes two first connecting thread grooves 11 arranged side by side along the width direction of fixed base 1. Connecting screws 6, first threaded through holes 22 and first connecting thread grooves 11 are connected one-to-one to detachably mount two clamping support plates 2 between any two sets of first connecting thread grooves 11 of fixed base 1. A connecting and positioning structure is provided between the clamping support plate 2 and the fixed base 1.

[0018] For example Figure 1 As shown, since the surface on the valve core 10 of the plug valve that needs to be machined with a dovetail groove is an inclined surface, for example... Figure 2 The top surface of the valve core 10 of the plug valve needs to be machined with a dovetail groove. In order to ensure the machining effect of the dovetail groove, the inclination angle of the upper surface of the fixed base 1 is adapted to the inclination angle of the dovetail groove machining surface of the plug valve core 10, so that the surface of the dovetail groove is parallel to the worktable surface 5 of the milling machine machining center.

[0019] To improve the clamping effect of the dovetail groove of the plug valve core during milling, for example... Figure 5 , Figure 6 As shown, a positioning groove is also provided on the pressure plate 3, and the V-shaped positioning groove 23 of the clamping support plate 2 and the positioning groove on the pressure plate 3 form a clamping cavity.

[0020] When using the clamping device of this utility model to process the dovetail groove of the plug valve core 10, firstly, the fixed base 1 is fixed on the worktable 5 of the milling machine machining center through the first connecting structure 4; then, according to the specifications and length of the plug valve core 10, two sets of first connecting thread grooves 11 with appropriate distances are selected, and the two clamping support plates 2 are fixed on the fixed base 1 by connecting screws 6, first threaded through holes 22 and first connecting thread grooves 11 in a one-to-one correspondence; finally, the valve shafts at both ends of the plug valve core 10 are installed in the V-shaped positioning grooves 23 of the clamping support plate 2, and the valve shafts are fixed by the second connecting structure 7 and pressure plate 3, thereby completing the clamping work for milling the dovetail groove of the plug valve core 10.

[0021] The connecting and positioning structure plays a connecting and positioning role during the installation of the clamping support plate 2, effectively improving the installation efficiency and effect of the clamping support plate 2. Two preferred structures for the connecting and positioning structure are: [Example 1] Figure 3 and Figure 5 As shown, the first type of connection positioning structure includes a first positioning groove 12 arranged along the length direction of the fixed base 1 and a first positioning protrusion 24 arranged at the bottom of the clamping support plate 2, with the first positioning protrusion 24 matched and disposed in the first positioning groove 12. The second type of connection positioning structure includes a second positioning protrusion arranged along the length direction of the fixed base 1 and a second positioning groove arranged at the bottom of the clamping support plate 2, with the second positioning protrusion matched and disposed in the second positioning groove.

[0022] The function of the first connecting structure 4 is to detachably fix the fixed base 1 to the worktable 5 of the milling machine machining center. A preferred structure of the first connecting structure 4 is as follows: Figure 2 As shown, the fixed base 1 has first connecting ears 13 on both sides. The first connecting structure 4 includes a connecting through groove 14, a T-slot bolt 41 and a fixing nut 42 on the first connecting ear 13. The T-slot bolt 41 is fixedly installed in the T-hole of the worktable 5 of the milling machine machining center. The T-slot bolt 41 passes through the connecting through groove 14 and is connected to the fixing nut 42.

[0023] To reduce the weight of the fixed base 1 and make it easier to pick up and remove, for example... Figure 4 As shown, at least one weight-reducing groove 15 is provided in the fixed base 1, and multiple weight-reducing grooves 15 are evenly distributed in the fixed base 1.

[0024] The function of the second connecting structure 7 is to detachably mount the pressure plate 3 onto the clamping support plate 2 via the second connecting structure 7. A preferred structure of the second connecting structure 7 is as follows: (e.g.) Figure 2 As shown, the second connecting structure 7 includes a double-ended stud 71, a clamping nut 72, a second connecting threaded groove 25 disposed on the top of the clamping support plate 2, and a second threaded through hole 31 disposed on the pressure plate 3. One end of the double-ended stud 71 is disposed in the second connecting threaded groove 25, and the other end of the double-ended stud 71 passes through the second threaded through hole 31 and is connected to the clamping nut 72.

[0025] To further improve the clamping and fixing effect of the plug valve core 10, for example... Figure 2 , Figure 7As shown, this utility model also includes an auxiliary wedge-shaped fixing block 8, which is fitted between the fixed base 1 and the valve core 10 of the plug valve. To further improve the performance of the auxiliary wedge-shaped fixing block 8, a fixing threaded through hole 26 is provided on the clamping support plate 2, and a fixing screw 9 is also included. The fixing screw 9 is fitted through the fixing threaded through hole 26, and the auxiliary wedge-shaped fixing block 8 abuts against the fixing screw 9.

[0026] In order to reduce the weight of the auxiliary wedge-shaped fixing block 8 and make it easier to pick up and disassemble, weight-reducing placement grooves 81 are provided on both sides of the auxiliary wedge-shaped fixing block 8.

[0027] Any two sets of first connecting thread grooves 11 of this utility model can be used for clamping and machining dovetail grooves of plug valve cores 10 of a certain specification and length, thereby significantly improving the application range of the clamping device and reducing the cost of milling dovetail grooves of plug valve cores 10.

Claims

1. A clamping device for milling dovetail grooves of plug valve cores, comprising a fixed base (1), two clamping support plates (2) and two pressure plates (3), wherein the upper surface of the fixed base (1) is an inclined surface, and the fixed base (1) can be detachably mounted on the worktable (5) of the milling machine machining center via a first connecting structure (4), and second connecting ears (21) are respectively provided on both sides of the clamping support plates (2), and first threaded through holes (22) are provided on the second connecting ears (21), and V-shaped positioning grooves (23) are provided on the upper surface of the clamping support plates (2), and the pressure plates (3) correspond one-to-one with the clamping support plates (2), and the pressure plates (3) are detachably mounted on the clamping support plates (2) via a second connecting structure (7), and a clamping cavity is formed between the corresponding clamping support plates (2) and pressure plates (3), characterized in that: Along the length direction of the fixed base (1), at least three sets of first connecting thread grooves (11) are provided at intervals on the upper surface of the fixed base (1). Each set of first connecting thread grooves (11) includes two first connecting thread grooves (11) arranged side by side along the width direction of the fixed base (1). The connecting screw (6), the first threaded through hole (22) and the first connecting thread groove (11) are connected one-to-one to detachably set the two clamping support plates (2) between any two sets of first connecting thread grooves (11) of the fixed base (1). A connecting and positioning structure is provided between the clamping support plate (2) and the fixed base (1).

2. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: The connection positioning structure includes a first positioning groove (12) arranged along the length direction of the fixed base (1) and a first positioning protrusion (24) arranged at the bottom of the clamping support plate (2). The first positioning protrusion (24) is matched and arranged in the first positioning groove (12).

3. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: The connection positioning structure includes a second positioning protrusion arranged along the length direction of the fixed base (1) and a second positioning groove arranged at the bottom of the clamping support plate (2), with the second positioning protrusion matched and arranged in the second positioning groove.

4. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: The fixed base (1) is provided with first connecting ears (13) on both sides respectively. The first connecting structure (4) includes a connecting through groove (14), a T-slot bolt (41) and a fixing nut (42) provided on the first connecting ear (13). The T-slot bolt (41) can be fixedly set on the worktable (5) of the milling machine machining center. The T-slot bolt (41) passes through the connecting through groove (14) and is connected to the fixing nut (42).

5. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: At least one weight-reducing groove (15) is provided in the fixed base (1).

6. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: The second connection structure (7) includes a double-ended stud (71), a clamping nut (72), a second connection threaded groove (25) provided on the top of the clamping support plate (2), and a second threaded through hole (31) provided on the pressure plate (3). One end of the double-ended stud (71) is provided in the second connection threaded groove (25), and the other end of the double-ended stud (71) passes through the second threaded through hole (31) and is connected to the clamping nut (72).

7. The clamping device for milling dovetail grooves of plug valve cores as described in any one of claims 1 to 6, characterized in that: It also includes an auxiliary wedge fixing block (8), which can be matched and locked between the fixed base (1) and the valve core (10) of the plug valve.

8. The clamping device for milling dovetail grooves of plug valve cores as described in claim 7, characterized in that: The auxiliary wedge-shaped fixing block (8) has weight-reducing placement grooves (81) on both sides.

9. The clamping device for milling dovetail grooves of plug valve cores as described in claim 1, characterized in that: The clamping support plate (2) is provided with a fixed thread through hole (26) and also includes a fixing screw (9). The fixing screw (9) is matched and passes through the fixed thread through hole (26). The auxiliary wedge fixing block (8) abuts against the fixing screw (9).

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