A complex curved surface machining clamp

Abstract

The utility model discloses a complex curved surface processing clamp, and the positioning part includes two opposites and intervally arranged V type support on the bottom plate, the positioning seat that is arranged on the bottom plate and is located two V type support same side, two oppositely arranged stopper on the positioning seat, the first positioning subassembly of positioning seat top -end and the second positioning subassembly of stopper on being arranged, two V type supports all are equipped with V type groove, and two V type grooves support the flange plate of pump shell, and the two inclined planes of V type groove abut the transition circular arc of flange plate edge two sides respectively, the first positioning subassembly holds up the pump shell and is positioned the pump shell in vertical direction, and the second positioning subassembly abuts the pump shell and is positioned the pump shell in horizontal direction, and the compression part is arranged on the bottom plate for compressing the pump shell on V type support and the first positioning subassembly. The clamping mode of the utility model has only two V type support support pump shell position, and the first positioning subassembly and the second positioning subassembly contact pump shell position and can not be polished, and the grinding dead angle is reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of grinding fixture technology, and in particular to a complex curved surface machining fixture. Background Technology

[0002] As a core component of fluid machinery such as centrifugal pumps, the pump casing primarily undertakes the functions of media energy conversion and structural pressure bearing. The pump casing has a complex curved surface shape and is typically machined by casting. Cast pump casings often have burrs on their surface; to ensure the workpiece's appearance and performance, these burrs need to be removed by grinding. Current CNC pump casing grinding equipment uses a vertical clamping method, but this type of clamping has the problem of many grinding dead angles, requiring manual re-grinding in many areas and resulting in low overall grinding efficiency. Utility Model Content

[0003] This invention provides a complex curved surface machining fixture to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A complex curved surface machining fixture includes: a base plate, a positioning component, and a clamping component; the positioning component includes: two V-shaped brackets disposed opposite to each other and spaced apart on the base plate, a positioning seat disposed on the base plate and located on the same side of the two V-shaped brackets, two stops disposed opposite to each other on the positioning seats, a first positioning component disposed on the top of the positioning seats, and a second positioning component disposed on the stops; both V-shaped brackets are provided with V-grooves and the center lines of the two V-grooves coincide, the two V-grooves support the flange of the pump casing, and the two inclined surfaces of the V-grooves respectively abut against the transition arcs on both sides of the flange edge; the first positioning component lifts the pump casing and positions the pump casing in the vertical direction, and the second positioning component abuts against the pump casing and positions the pump casing in the horizontal direction; the clamping component is disposed on the base plate and is used to clamp the pump casing onto the V-shaped brackets and the first positioning component.

[0005] Preferably, the first positioning component includes at least two positioning blocks, the spherical surfaces of the at least two positioning blocks abutting against the first positioning surface of the square plate of the pump casing.

[0006] Preferably, the positioning block is fixed with a screw, the screw is threaded to a threaded hole on the positioning seat, and a locking nut is provided on the screw.

[0007] Preferably, the second positioning component includes two ball-head plungers, which are respectively disposed on two stops and abut against the second positioning surface of the pump housing square plate.

[0008] Preferably, two positioning components are symmetrically arranged on the base plate, and the V-shaped brackets of the two positioning components are located outside the positioning seats of the two positioning components; the clamping component is used to clamp the two positioning components.

[0009] Preferably, the clamping component includes: a driver mounted on the base plate, a pressure plate rotatably connected to the output end of the driver, and two V-shaped pressure blocks respectively disposed at both ends of the pressure plate; the driver is located between the two positioning components, and the driver drives the pressure plate to rise and fall; the V-shaped pressure blocks are used to press on both sides of the pump housing reinforcing ribs.

[0010] Preferably, the V-shaped pressure block is connected to the end of the pressure plate by a positioning pin. The end face of the pressure plate is provided with a threaded hole, and the V-shaped pressure block is provided with a positioning through hole. The positioning pin includes a screw section, a positioning section and a nut. The screw section is threadedly connected to the threaded hole of the pressure plate, the positioning section is clearance-fitted with the positioning through hole, and the nut has an adjustment gap with the side of the V-shaped pressure block.

[0011] Preferably, the clamping component further includes a baffle that abuts against the side wall of the pressure plate.

[0012] Preferably, the base plate has at least two clearance holes, and the clearance holes are provided with positioning sleeves for positioning the base plate.

[0013] Preferably, the top of the positioning sleeve is provided with a locking adjustment pad, and the locking screw passes through the locking adjustment pad and enters the central hole of the positioning sleeve.

[0014] Beneficial effects: This application discloses a complex curved surface machining fixture that positions the pump casing by setting two V-shaped brackets, a first positioning component, and a second positioning component, and then clamps and fixes it by a clamping component. This application changes the vertical clamping method to a horizontal clamping method, so that only the two V-shaped brackets support the position of the pump casing, and the position of the first positioning component and the second positioning component in contact with the pump casing cannot be ground, which greatly reduces the grinding dead angle. The number of places that need to be manually ground afterward is small, which is conducive to improving the overall grinding effect and efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a pump casing disclosed in this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a pump casing disclosed in this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the structure of a complex curved surface machining fixture disclosed in this utility model; Figure 4This is a front view of a complex curved surface machining fixture disclosed in this utility model; Figure 5 This is a side view of a complex curved surface machining fixture disclosed in this utility model; Figure 6 This is a top view of a complex curved surface machining fixture disclosed in this utility model; Figure 7 for Figure 6 Sectional view of AA; Figure 8 for Figure 7 A magnified view of part I; Figure 9 for Figure 7 Enlarged view of a section of section II; Figure 10 for Figure 7 Enlarged view of a section of section III; Figure 11 This is a schematic diagram of the structure of a complex curved surface machining fixture with one side of the pump casing hidden, as disclosed in this utility model. Figure 12 This is a front view of a complex curved surface machining fixture disclosed in this utility model, after concealing one side of the pump casing; Figure 13 for Figure 12 A cross-sectional view of BB.

[0017] 1. Base plate; 21. V-shaped bracket; 211. V-groove; 22. Positioning seat; 23. Stop block; 241. Positioning block; 242. Screw; 243. Locking nut; 25. Ball plunger; 31. Driver; 32. Pressure plate; 33. V-shaped pressure block; 34. Positioning pin; 341. Screw section; 342. Positioning section; 343. Nut; 35. Baffle; 36. Cylinder seat; 41. Positioning sleeve; 42. Locking adjusting shim; 43. Locking screw; 9. Pump housing; 91. Flange; 911. Transition arc; 92. Square plate; 921. First positioning surface; 922. Second positioning surface; 93. Reinforcing rib; 94. Cylindrical part; 95. Damping platform; 96. First support plate; 97. Second support plate; 98. Upper ring; 99. Round tube. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 and 2 As shown, the pump casing 9 includes: a cylindrical section 94, a flange 91, a damping platform 95, a first support plate 96, a second support plate 97, an upper ring 98, and a circular tube 99. A square plate 92 is fixed on the second support plate 97, and the circular tube 99 is fixed on the second support plate 97 and located below the square plate 92. The square plate 92 has a first positioning surface 921 and a second positioning surface 922. A reinforcing rib 93 is fixed at the angle between the first support plate 96 and the flange 91. The damping platform 95, the first support plate 96, the second support plate 97, and the upper ring 98 form two windows, and the transition between the first support plate 96 and the second support plate 97 and the damping platform 95 and the upper ring 98 forms a root fillet. After casting, the pump casing 9 requires grinding of the end faces of the cylindrical section 94, the damping platform 95, the circular tube 99, the two windows, the root fillet, the end face of the upper ring 98, and the corresponding mold gaps.

[0020] A complex curved surface machining fixture, combined with Figures 1-13 As shown, the system includes: a base plate 1, positioning components, and clamping components. The positioning components include: two V-shaped brackets 21 disposed opposite to each other and spaced apart on the base plate 1; a positioning seat 22 disposed on the base plate 1 and located on the same side of the two V-shaped brackets 21; two blocks 23 disposed opposite to each other on the positioning seats 22; a first positioning component disposed on the top of the positioning seat 22; and a second positioning component disposed on the blocks 23. Both V-shaped brackets 21 are provided with V-shaped grooves 211, and the center lines of the two V-shaped grooves 211 coincide. The two V-shaped grooves 211 support the flange 91 of the pump housing 9, and the two inclined surfaces of the V-shaped grooves 211 respectively abut against the transition arcs 911 on both sides of the edge of the flange 91. The first positioning component lifts the pump housing 9 and positions the pump housing 9 in the vertical direction, and the second positioning component abuts against the pump housing 9 and positions the pump housing 9 in the horizontal direction. The clamping components are disposed on the base plate 1 and are used to clamp the pump housing 9 onto the V-shaped brackets 21 and the first positioning components. This application achieves the positioning of the pump housing 9 by setting two V-shaped brackets 21, a first positioning component, and a second positioning component, and then clamps and fixes it by clamping components. This application changes the vertical clamping method to a horizontal clamping method, so that only the two V-shaped brackets 21 support the position of the pump housing 9, and the position of the first positioning component and the second positioning component in contact with the pump housing 9 cannot be ground, which greatly reduces the grinding dead angle. The number of positions and the area that need to be manually ground later are small, which is conducive to improving the overall grinding effect and efficiency.

[0021] Specifically, the V-shaped bracket 21 is fixed to the upper surface of the base plate 1 by positioning pins and screws, and an adjustment pad is provided between the V-shaped bracket 21 and the base plate 1 to adjust the height.

[0022] Preferably, the first positioning component includes at least two positioning blocks 241. In this embodiment, there are two positioning blocks 241. The spherical surfaces of the two positioning blocks 241 abut against the first positioning surface 921 of the square plate 92 of the pump housing 9, thereby lifting and positioning the pump housing 9. Moreover, the use of spherical surfaces to abut against the first positioning surface 921 can both accommodate the draft angle of the first positioning surface 921 and reduce the contact area.

[0023] Preferably, the positioning block 241 is fixedly provided with a screw 242, which is threadedly connected to a threaded hole on the positioning seat 22, and a locking nut 243 is provided on the screw 242. The height of the positioning block 241 can be adjusted by loosening the locking nut 243 and then turning the screw 242, and then locked and fixed by the locking nut 243, so as to be adjusted after the assembly fixture is assembled.

[0024] Specifically, the stop block 23 is fixed to both sides of the positioning seat 22 by screws, and the stop block 23 is located outside the positioning block 241. The positioning seat 22 is also provided with set screws to further tighten the screw 242 for fixation.

[0025] Preferably, the second positioning component includes two ball plungers 25, which are respectively disposed on two stops 23. The two ball plungers 25 abut against two second positioning surfaces 922 of the square plate 92 of the pump housing 9, thereby defining the horizontal position of the pump housing 9.

[0026] Specifically, the round tube 99 is positioned downwards and can be located between the V-shaped bracket 21 and the positioning seat 22. The grinding head can pass between the two V-shaped brackets 21 to grind the end face of the round tube 99.

[0027] Preferably, two positioning components are symmetrically arranged on the base plate 1, and the V-shaped brackets 21 of the two positioning components are located outside the positioning seats 22 of the two positioning components; the clamping component is used to clamp the two positioning components, so as to realize the clamping of two pump housings 9 at one time, which is beneficial to improving production efficiency.

[0028] Preferably, the clamping component includes: a driver 31 mounted on the base plate 1, a pressure plate 32 rotatably connected to the output end of the driver 31, and two V-shaped pressure blocks 33 respectively disposed at both ends of the pressure plate 32; the driver 31 is located between the two positioning components, and the driver 31 drives the pressure plate 32 to rise and fall; the V-shaped pressure blocks 33 are used to press on both sides of the reinforcing rib 93 of the pump housing 9. The driver 31 drives the pressure plate 32 to descend, and the pressure plate 32 drives the V-shaped pressure blocks 33 to clamp the pump housing 9.

[0029] Specifically, the driver 31 is a cylinder, which is mounted on the base plate 1 via a cylinder seat 36. The pressure plate 32 has an elongated hole in the middle along its length. The piston rod of the cylinder is connected to a connector, which is inserted into the elongated hole and pinned to the pressure plate 32 to ensure that the two pump housings 9 can be pressed together reliably in one go.

[0030] Preferably, the V-shaped pressure block 33 is connected to the end of the pressure plate 32 via a positioning pin 34. The end face of the pressure plate 32 is provided with a threaded hole, and the V-shaped pressure block 33 is provided with a positioning through hole. The positioning pin 34 includes a screw section 341, a positioning section 342, and a nut 343. The screw section 341 is threadedly connected to the threaded hole of the pressure plate 32. The positioning section 342 is clearance-fitted with the positioning through hole. The nut 343 and the side of the V-shaped pressure block 33 are provided with an adjustment gap, so that the V-shaped pressure block 33 can swing slightly relative to the pressure plate 32 to achieve adjustment during pressing and ensure that the V-shaped pressure block 33 fits better with the pump housing 9.

[0031] Specifically, the end face of the pressure plate 32 is provided with a countersunk hole, and a threaded hole is machined at the bottom of the countersunk hole. The positioning section 342 is inserted into the countersunk hole. The pressure plate 32 is also provided with a set screw to fix the positioning pin 34 to prevent it from loosening after repeated clamping and loosening.

[0032] Preferably, the clamping component further includes a baffle 35, which abuts against the side wall of the pressure plate 32 to prevent the pressure plate 32 from twisting laterally and to ensure that the pressure plate 32 rotates in the vertical plane, thereby ensuring the clamping position of the V-shaped pressure block 33.

[0033] Preferably, the base plate 1 has at least two clearance holes. In this embodiment, there are two clearance holes. A positioning sleeve 41 for positioning the base plate 1 is provided in the clearance hole. Positioning is achieved by the cooperation of the positioning sleeve 41 and the positioning pin.

[0034] Preferably, the top of the positioning sleeve 41 is provided with a locking adjustment pad 42, and the locking screw 43 passes through the locking adjustment pad 42 and enters the central hole of the positioning sleeve 41. By screwing the locking screw 43 into the threaded hole of the positioning pin that mates with the positioning sleeve 41, the base plate 1 can be fixed. In this embodiment, the locking adjustment pad 42 has a U-shaped hole, so that the locking screw 43 can be loosened slightly and the locking adjustment pad 42 can be directly pulled out.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A complex curved surface machining fixture, characterized in that, include: The base plate (1), positioning components, and clamping components; the positioning components include: two V-shaped brackets (21) disposed opposite to each other and spaced apart on the base plate (1), a positioning seat (22) disposed on the base plate (1) and located on the same side of the two V-shaped brackets (21), two stops (23) disposed opposite to each other on the positioning seats (22), a first positioning component disposed on the top of the positioning seat (22), and a second positioning component disposed on the stops (23); both V-shaped brackets (21) are provided with V-shaped grooves (211) and the two V-shaped grooves (211) are... The center lines coincide, and the two V-grooves (211) support the flange (91) of the pump housing (9). The two inclined surfaces of the V-grooves (211) respectively abut against the transition arcs (911) on both sides of the edge of the flange (91). The first positioning component lifts the pump housing (9) and positions the pump housing (9) in the vertical direction, and the second positioning component abuts against the pump housing (9) and positions the pump housing (9) in the horizontal direction. The clamping component is provided on the base plate (1) and is used to clamp the pump housing (9) onto the V-bracket (21) and the first positioning component.

2. The complex curved surface machining fixture according to claim 1, characterized in that, The first positioning component includes at least two positioning blocks (241), and the spherical surfaces of the at least two positioning blocks (241) abut against the first positioning surface (921) of the square plate (92) of the pump housing (9).

3. A complex curved surface machining fixture according to claim 2, characterized in that, The positioning block (241) is fixed with a screw (242), the screw (242) is threaded to a threaded hole on the positioning seat (22), and the screw (242) is provided with a locking nut (243).

4. A complex curved surface machining fixture according to claim 1, characterized in that, The second positioning component includes two ball plungers (25), which are respectively disposed on two stops (23) and abut against the second positioning surface (922) of the square plate (92) of the pump housing (9).

5. A complex curved surface machining fixture according to claim 1, characterized in that, Two positioning components are symmetrically arranged on the base plate (1), and the V-shaped brackets (21) of the two positioning components are located outside the positioning seats (22) of the two positioning components; the pressing component is used to press the two positioning components.

6. A complex curved surface machining fixture according to claim 5, characterized in that, The clamping component includes: a driver (31) mounted on the base plate (1), a pressure plate (32) rotatably connected to the output end of the driver (31), and two V-shaped pressure blocks (33) respectively located at both ends of the pressure plate (32); the driver (31) is located between the two positioning components, and the driver (31) drives the pressure plate (32) to rise and fall; the V-shaped pressure blocks (33) are used to press on both sides of the reinforcing ribs (93) of the pump housing (9).

7. A complex curved surface machining fixture according to claim 6, characterized in that, The V-shaped pressure block (33) is connected to the end of the pressure plate (32) by a positioning pin (34). The end face of the pressure plate (32) is provided with a threaded hole. The V-shaped pressure block (33) is provided with a positioning through hole. The positioning pin (34) includes a screw section (341), a positioning section (342) and a nut (343). The screw section (341) is threadedly connected to the threaded hole of the pressure plate (32). The positioning section (342) is clearance-fitted with the positioning through hole. The nut (343) has an adjustment gap with the side of the V-shaped pressure block (33).

8. A complex curved surface machining fixture according to claim 6, characterized in that, The clamping component also includes a baffle (35) that abuts against the side wall of the pressure plate (32).

9. A complex curved surface machining fixture according to claim 1, characterized in that, The base plate (1) is provided with at least two clearance holes, and the clearance holes are provided with positioning sleeves (41) for positioning the base plate (1).

10. A complex curved surface machining fixture according to claim 9, characterized in that, The top of the positioning sleeve (41) is provided with a locking adjustment pad (42), and the locking screw (43) passes through the locking adjustment pad (42) and enters the center hole of the positioning sleeve (41).

Images