A clamping device for processing a scroll plate

Abstract

The utility model provides a kind of clamping device for scroll disc processing, including three-jaw chuck, the three-jaw chuck includes movable dog, replaceable clamping unit, the installation unit for the dismounting of clamping unit and the axial fixing unit for the axial fixation of scroll disc, the utility model relates to scroll disc processing equipment technical field, the utility model is provided with replaceable clamping unit, realized the modular design of clamping function, when clamping unit is worn due to long-term contact with workpiece, operator need not to carry out complex repair or replacement to whole three-jaw chuck or movable dog, but can utilize the convenient dismounting structure provided by installation unit, worn clamping unit is quickly detached as an independent module, and a brand-new clamping unit is installed, while the axial fixing unit set on installation unit, ensure that axial fixing rod can be pressed to scroll disc, to realize reliable axial locking of workpiece in machining process.

Description

Technical Field

[0001] This utility model relates to the technical field of scroll plate processing equipment, and in particular to a clamping device for scroll plate processing. Background Technology

[0002] As a core precision component in fluid machinery such as compressors and expanders, scroll disks have complex profiles and extremely high precision requirements. They are usually machined using CNC milling machines or mill-turning centers. During the machining process, the stability and precision of workpiece clamping, as well as the ease of operation, directly determine the quality of the final product and production efficiency.

[0003] Traditional machining fixtures typically use universal three-jaw chucks for radial clamping. During machining, the moving jaws of the universal three-jaw chuck inevitably wear down after multiple clamping operations on the scroll plate, leading to a decrease in clamping accuracy and affecting the clamping effect and workpiece positioning stability. At the same time, existing scroll plate clamping devices are usually three-jaw chucks, whose structure mainly focuses on radial clamping and is difficult to provide reliable axial positioning. Therefore, under the action of cutting forces, the workpiece is prone to axial movement, which not only affects the machining dimensional accuracy and surface quality, but may also lead to increased vibration and reduced tool life. Utility Model Content

[0004] The purpose of this invention is to provide a clamping device for machining scroll plates. This three-jaw chuck can solve the problem that after repeated clamping of the scroll plate by the moving jaws of a traditional three-jaw chuck, the clamping surface will inevitably wear, leading to a decrease in clamping accuracy and affecting the clamping effect and the stability of workpiece positioning. At the same time, existing scroll plate clamping devices are usually three-jaw chucks, whose structure mainly focuses on radial clamping and is difficult to provide reliable axial positioning. Therefore, under the action of cutting force, the workpiece is prone to axial movement, which not only affects the machining dimensional accuracy and surface quality, but may also lead to increased vibration and reduced tool life.

[0005] This utility model provides a clamping device for machining a scroll plate, including a three-jaw chuck. The three-jaw chuck includes movable jaws, a replaceable clamping unit, an installation unit for disassembling and assembling the clamping unit, and an axial fixing unit for axially fixing the scroll plate. The installation unit is disposed on the movable jaws, the clamping unit is connected to the movable jaws through the installation unit, and the axial fixing unit is disposed on the installation unit.

[0006] Preferably, the clamping unit includes a clamping block and a clamping head. The clamping block is fixedly connected to the clamping head. The movable claw has a groove inside that matches the clamping block. The clamping block is connected to the movable claw by being embedded in the groove. The clamping block also has two first positioning holes. The groove also has two second positioning holes that correspond to the first positioning holes. The first positioning holes and the second positioning holes are coaxially connected after the clamping block is fully embedded in the groove.

[0007] Preferably, the installation unit includes a supporting shell, a bidirectional lead screw, two sliders, two connecting rods, a movable plate, two slide rails, and two positioning pins. The supporting shell is fixedly mounted on the top of the movable claw. The two ends of the bidirectional lead screw are rotatably connected to the left and right sides of the supporting shell, respectively. The internal threads of the two sliders are connected to the opposite threaded sections on the left and right sides of the bidirectional lead screw, respectively. One end of each of the two sets of connecting rods is movably connected to the front and rear sides of the two sliders, respectively. The top of the movable plate is movably connected to the other ends of the two sets of connecting rods. The two slide rails are fixedly mounted on the left and right sides inside the supporting shell, respectively. The movable plate is slidably connected to the two slide rails. The two positioning pins are fixedly mounted on the bottom of the movable plate, and the positioning pins movably pass through the first positioning hole and the positioning hole, respectively.

[0008] Preferably, the axial fixing unit includes a bracket, a screw, two limiting guide rods, a pressing rod, and an axial fixing rod. The bracket is fixedly mounted on the top of the supporting housing. The two ends of the screw are rotatably connected to the top of the supporting housing and the top of the bracket, respectively. The two limiting guide rods are fixedly mounted between the top of the bracket and the top of the supporting housing. The pressing rod is movably connected to the screw and the two limiting guide rods, and the pressing rod movably passes through the right side of the bracket. The axial fixing rod is fixedly mounted at the bottom of the pressing rod.

[0009] Preferably, the three-jaw chuck further includes a limiting unit for limiting the axial fixing unit, thereby improving the axial fixing stability.

[0010] Preferably, the limiting unit includes a rotating handle, a limiting block, a limiting cylinder, and a limiting rod. The rotating handle is fixedly connected to one end of the screw. The limiting block is fixedly disposed on the outer edge of the rotating handle and has a limiting hole. The limiting cylinder is fixedly disposed on the top of the bracket and matches the limiting hole. The limiting rod moves through the limiting hole and is then inserted into the limiting cylinder.

[0011] Preferably, each group of connecting rods consists of two rods, and one end of each connecting rod is movably connected to the front and rear sides of the slider, respectively.

[0012] Preferably, a rubber pad is fixedly provided at the bottom end of the axial fixing rod.

[0013] This invention provides an improved clamping device for scroll machining, which, compared with the prior art, has the following improvements: By setting a replaceable clamping unit, this invention achieves a modular design for the clamping function. When the clamping unit inevitably wears due to long-term contact with the workpiece, the operator does not need to perform complex repairs or replacements on the entire three-jaw chuck or movable jaws. Instead, the operator can quickly disassemble the worn clamping unit as an independent module using the convenient disassembly and assembly structure provided by the mounting unit, and install a brand new clamping unit. This design not only directly solves the core problem of the traditional three-jaw chuck where the clamping accuracy continuously decreases due to wear of the movable jaws, thus affecting the workpiece positioning stability and final machining accuracy, but also significantly reduces long-term operating costs by replacing worn parts instead of scrapping the entire device. Simultaneously, the axial fixing unit set on the mounting unit ensures that the axial fixing rod can press against the scroll, thereby achieving reliable axial locking of the workpiece during machining and eliminating the risk of axial movement of the scroll under cutting forces. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is an isometric structural diagram of the movable claw, clamping unit, mounting unit, axial fixing unit, and limiting unit of this utility model; Figure 3 for Figure 2 A schematic diagram of the isometric structure of the clamping unit in the replacement state; Figure 4 This is a schematic diagram of the main structure of the axial fixing unit of this utility model; Figure 5 This is a side view of the axial fixing unit of this utility model. Figure 6 This is a front view structural diagram of the movable claw and mounting unit of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Movable jaw; 2. Clamping unit; 21. Clamping block; 22. Clamping head; 3. Mounting unit; 31. Support housing; 32. Bidirectional lead screw; 33. Slider; 34. Connecting rod; 35. Moving plate; 36. Slide rail; 37. Positioning pin; 4. Axial fixing unit; 41. Bracket; 42. Screw; 43. Limiting guide rod; 44. Pressing rod; 45. Axial fixing rod; 46. Rubber pad; 5. Limiting unit; 51. Rotating handle; 52. Limiting block; 53. Limiting cylinder; 54. Limiting rod. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. 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.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1-6This utility model provides a technical solution: a clamping device for machining a scroll plate, comprising a three-jaw chuck. The three-jaw chuck includes a movable jaw 1, a replaceable clamping unit 2, an installation unit 3 for disassembling and assembling the clamping unit 2, and an axial fixing unit 4 for axially fixing the scroll plate. The installation unit 3 is disposed on the movable jaw 1, and the clamping unit 2 is connected to the movable jaw 1 through the installation unit 3. The axial fixing unit 4 is disposed on the installation unit 3. The three-jaw chuck can achieve precise positioning and clamping in both radial and axial directions, thereby effectively ensuring the stability of the scroll plate during machining and avoiding machining errors caused by insecure clamping or inaccurate positioning.

[0021] Specifically, the clamping unit 2 includes a locking block 21 and a clamping head 22. The locking block 21 is fixedly connected to the clamping head 22. The movable claw 1 has a slot inside that matches the locking block 21. The locking block 21 is connected to the movable claw 1 by being embedded in the slot. The clamping head 22 can be replaced by inserting the locking block 21 into the slot. The locking block 21 also has two first positioning holes. The slot also has two second positioning holes that correspond to the first positioning holes. The first positioning holes and the second positioning holes are coaxially connected after the locking block 21 is fully embedded in the slot. The clamping head 22 of the clamping unit 2 directly contacts the scroll plate base, thereby radially clamping it.

[0022] Specifically, the mounting unit 3 includes a supporting housing 31, a bidirectional lead screw 32, two sliders 33, two connecting rods 34, a moving plate 35, two slide rails 36, and two positioning pins 37. The supporting housing 31 is fixedly mounted on the top of the movable claw 1. The two ends of the bidirectional lead screw 32 are rotatably connected to the left and right sides of the supporting housing 31, respectively. The internal threads of the two sliders 33 are respectively connected to the threaded sections of the bidirectional lead screw 32 with opposite directions of rotation on the left and right sides. One end of each of the two sets of connecting rods 34 is movably connected to the front and rear sides of the two sliders 33, respectively. The moving plate 35... The top of the unit is movably connected to the other end of the two sets of connecting rods 34. The two slide rails 36 are respectively fixedly installed on the left and right sides inside the support housing 31. The moving plate 35 is slidably connected to the two slide rails 36. The two positioning pins 37 are fixedly installed at the bottom of the moving plate 35. The positioning pins 37 are respectively movably inserted through the first positioning hole and the second positioning hole of the locking block 21. After the positioning pins 37 pass through the first positioning hole and the second positioning hole of the locking block 21, they fix the clamping unit 2. After the positioning pins 37 disengage from the first positioning hole and the second positioning hole of the locking block 21, they unlock the clamping unit 2.

[0023] Specifically, the axial fixing unit 4 includes a bracket 41, a screw 42, two limiting guide rods 43, a pressing rod 44, and an axial fixing rod 45. The bracket 41 is fixedly installed on the top of the supporting shell 31. The two ends of the screw 42 are rotatably connected to the top of the supporting shell 31 and the top of the bracket 41, respectively. The two limiting guide rods 43 are fixedly installed between the top of the bracket 41 and the top of the supporting shell 31, respectively, and are located on the left and right sides of the screw 42. The pressing rod 44 is movably connected to the screw 42 and the two limiting guide rods 43, and the pressing rod 44 movably passes through the right side of the bracket 41. The pressing rod 44 is threadedly connected to the screw 42 and slidably connected to the limiting guide rods 43. The axial fixing rod 45 is fixedly installed at the bottom of the pressing rod 44 and is located directly above the vortex disk base, thereby achieving axial fixing of the vortex disk.

[0024] Specifically, the three-jaw chuck also includes a limiting unit 5 for limiting the axial fixing unit 4 to improve the axial fixing stability.

[0025] Specifically, the limiting unit 5 includes a rotating handle 51, a limiting block 52, a limiting cylinder 53, and a limiting rod 54. The rotating handle 51 is fixedly connected to one end of the screw 42. The limiting block 52 is fixedly disposed on the outer edge of the rotating handle 51, and a limiting hole is provided on the limiting block 52. The limiting cylinder 53 is fixedly disposed on the top outer side of the bracket 41, and the limiting cylinder 53 matches the limiting hole. The limiting rod 54 moves through the limiting hole and is inserted into the limiting cylinder 53. When the rotating handle 51 is rotated to a predetermined position, the limiting hole on the limiting block 52 fixed to its outer edge aligns with the limiting cylinder 53 fixed to the top of the bracket 41, indicating that the pressing rod 44 has moved to the lowest point.

[0026] Specifically, each group of connecting rods 34 consists of two rods, and one end of each connecting rod 34 is movably connected to the front and rear sides of the slider 33, respectively.

[0027] Specifically, a rubber pad 46 is fixedly provided at the bottom end of the axial fixing rod 45. The rubber pad 46 increases the friction of the pressing rod 44 and improves the clamping accuracy.

[0028] Working principle: When the clamping unit 2 needs to be replaced, rotate the bidirectional lead screw 32. Since the threads on the left and right sides of the bidirectional lead screw 32 rotate in opposite directions, the two sliders 33 will drive one end of the two sets of connecting rods 34 to move closer or further apart. The movement of the sliders 33 is transmitted to the moving plate 35 through the two sets of connecting rods 34. Since the moving plate 35 is slidably connected to the two slide rails 36, the moving plate 35 will move up and down in a linear reciprocating motion as the connecting rods 34 swing. When the moving plate 35 moves upward, the two positioning pins 37 at its bottom will be pulled out from the first positioning hole of the clamping unit 2 block 21 and the second positioning hole of the movable claw 1 slot. At this time, the worn clamping unit 2 can be pulled out along the slot direction and a new clamping unit 2 can be inserted. After replacement, rotate the bidirectional lead screw 32 in the opposite direction. The moving plate 35 will drive the positioning pins 37 to move downward and re-insert them into the first positioning hole and the second positioning hole, thereby completing the quick fixing and precise positioning of the clamping unit 2.

[0029] During the machining process of the scroll plate, the workpiece is first initially radially clamped by the movable jaw 1 of the three-jaw chuck. Then, the axial fixing unit 4 is activated. By rotating the rotating handle 51 connected to one end of the screw 42, the screw 42 is rotated. The rotation of the screw 42 drives the pressing rod 44, which is threadedly connected to the screw 42, to move downward along the direction of the limiting guide rod 43. The axial fixing rod 45 at the bottom of the pressing rod 44 then presses down to press the end face of the scroll plate, thereby achieving axial fixing.

[0030] To prevent the screw 42 from rotating under the action of cutting force during axial fixing, when the rotating handle 51 is rotated to the predetermined position, the limiting hole on the limiting block 52 fixed to its outer edge is aligned with the limiting cylinder 53 fixed to the top of the bracket 41. At this time, the limiting rod 54 is inserted into the limiting hole and extends into the limiting cylinder 53, thereby limiting the further rotation of the rotating handle 51, ensuring that the clamping force applied by the axial fixing rod 45 is stable and reliable, effectively preventing the workpiece from axial movement under the action of cutting force, and the presence of the rubber pad 46 protects the surface of the scroll plate from damage.

[0031] 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 the 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 clamping device for machining a scroll plate, characterized in that, The chuck includes a three-jaw chuck, which includes a movable jaw (1), a replaceable clamping unit (2), an installation unit (3) for assembling and disassembling the clamping unit (2), and an axial fixing unit (4) for axially fixing the scroll plate. The installation unit (3) is disposed on the movable jaw (1), and the clamping unit (2) is connected to the movable jaw (1) through the installation unit (3). The axial fixing unit (4) is disposed on the installation unit (3).

2. The clamping device for machining a scroll plate according to claim 1, characterized in that, The clamping unit (2) includes a clamping block (21) and a clamping head (22). The clamping block (21) is fixedly connected to the clamping head (22). The movable claw (1) has a slot inside that matches the clamping block (21). The clamping block (21) is connected to the movable claw (1) by being embedded in the slot. The clamping block (21) also has two first positioning holes. The slot also has two second positioning holes that correspond to the first positioning holes. The first positioning holes and the second positioning holes are coaxially connected after the clamping block (21) is fully embedded in the slot.

3. The clamping device for machining a scroll plate according to claim 2, characterized in that, The mounting unit (3) includes a support housing (31), a bidirectional lead screw (32), two sliders (33), two connecting rods (34), a movable plate (35), two slide rails (36), and two positioning pins (37). The support housing (31) is fixedly mounted on the top of the movable claw (1). The two ends of the bidirectional lead screw (32) are rotatably connected to the left and right sides of the support housing (31), respectively. The internal threads of the two sliders (33) are respectively connected to the threaded sections with opposite directions of rotation on the left and right sides of the bidirectional lead screw (32). One end of the connecting rod (34) is movably connected to the front and rear sides of the two sliders (33), the top of the moving plate (35) is movably connected to the other end of the two connecting rods (34), the two slide rails (36) are fixedly installed on the left and right sides inside the supporting shell (31), the moving plate (35) is slidably connected to the two slide rails (36), and the two positioning pins (37) are fixedly installed at the bottom of the moving plate (35), and the positioning pins (37) are movably inserted through the first positioning hole and the positioning hole respectively.

4. The clamping device for machining a scroll plate according to claim 3, characterized in that, The axial fixing unit (4) includes a bracket (41), a screw (42), two limiting guide rods (43), a pressing rod (44), and an axial fixing rod (45). The bracket (41) is fixedly installed on the top of the supporting shell (31). The two ends of the screw (42) are rotatably connected to the top of the supporting shell (31) and the top of the bracket (41), respectively. The two limiting guide rods (43) are fixedly installed between the top of the bracket (41) and the top of the supporting shell (31). The pressing rod (44) is movably connected to the screw (42) and the two limiting guide rods (43), and the pressing rod (44) movably passes through the right side of the bracket (41). The axial fixing rod (45) is fixedly installed at the bottom of the pressing rod (44).

5. The clamping device for machining a scroll plate according to claim 1, characterized in that, The three-jaw chuck also includes a limiting unit (5) for limiting the axial fixing unit (4) to improve the axial fixing stability.

6. The clamping device for machining a scroll plate according to claim 5, characterized in that, The limiting unit (5) includes a rotating handle (51), a limiting block (52), a limiting cylinder (53), and a limiting rod (54). The rotating handle (51) is fixedly connected to one end of the screw (42). The limiting block (52) is fixedly disposed on the outer edge of the rotating handle (51), and a limiting hole is provided on the limiting block (52). The limiting cylinder (53) is fixedly disposed on the top of the bracket (41), and the limiting cylinder (53) matches the limiting hole. The limiting rod (54) moves through the limiting hole and is inserted into the limiting cylinder (53).

7. A clamping device for machining a scroll plate according to claim 3, characterized in that, Each set of connecting rods (34) consists of two rods, and one end of each connecting rod (34) is movably connected to the front and rear sides of the slider (33).

8. A clamping device for machining a scroll plate according to claim 4, characterized in that, A rubber pad (46) is fixedly installed at the bottom end of the axial fixing rod (45).

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