Numerical control milling machine fixture for stepped flange plate

Abstract

The invention relates to the technical field of machining, and provides a numerical control milling machine fixture for a stepped flange plate, which comprises a base, a transmission unit, a supporting unit, a clamping unit and a workpiece. The crank rotates in the forward direction, the left nut and the right nut move in the opposite directions, the function of clamping a workpiece is achieved, and the nuts are tightened to assist in clamping the workpiece. Through the combined clamping mode of inner supporting and outer pressing, rapid, precise and stable clamping of the stepped flange plate is achieved, the stepped flange plate machining tool has the advantages of being high in positioning precision, good in machining rigidity, capable of completely exposing the workpiece machining face and suitable for workpieces within a certain size range, and the machining efficiency and quality are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a special fixture for CNC milling machines, which is particularly suitable for clamping and positioning flange-type parts with a stepped structure. Background Technology

[0002] Stepped flanges are common parts in mechanical manufacturing, and their multi-step structure presents challenges for clamping during CNC milling. Currently, the main methods used are general-purpose three-jaw chucks to hold the outer diameter or pressure plates directly pressing it onto the worktable. The former has a small clamping contact area, insufficient rigidity, and can obstruct the machining area; the latter has low clamping efficiency, uneven distribution of clamping force which can easily lead to workpiece deformation, and cumbersome alignment. Dedicated integral fixtures designed for specific products lack flexibility and are costly. Existing technologies generally suffer from problems such as poor positioning accuracy, insufficient machining rigidity, reduced machining accessibility, or poor versatility. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art and provide a CNC milling machine fixture for stepped flanges to achieve fast, precise and stable clamping of such parts, while ensuring high rigidity and high machinability, and having good versatility.

[0004] The technical problem to be solved by this invention can be achieved through the following technical solutions.

[0005] A CNC milling machine fixture for stepped flanges includes a base, a transmission unit, a support unit, a clamping unit, and a workpiece; characterized in that: the base is fixedly mounted on the milling machine worktable by bolts, the transmission unit is disposed on the base, the support unit is fixedly mounted on the base by bolts, and the clamping unit is mounted on the support unit.

[0006] The base consists of a guide rail, a first mounting hole, a fixed seat, a first bearing, a support seat, a second bearing, and a second mounting hole. The guide rail is fixedly mounted on the base. The first mounting hole is fixedly connected to the milling machine worktable by bolts. The fixed seat is connected to the base by bolts. The first bearing is mounted on a bearing seat. The support seat is connected to the base by bolts. The second bearing is mounted on the support seat. The second mounting hole is used to connect a support unit.

[0007] The transmission unit consists of a right nut, a right nut seat, a right screw, a limiting block, a left nut, a left nut seat, a left screw, and a crank handle. The right nut is mounted on the right screw, the right nut seat is fixedly connected to the right nut, the limiting block is fixedly mounted in the middle of the transmission unit, the left nut is mounted on the left screw, the left nut seat is fixedly connected to the left nut, and the crank handle is connected to the transmission unit via a key.

[0008] The support unit consists of a support, a support plate, and a third mounting hole; the support is fixedly mounted on the base through the second mounting hole, the support plate is fixedly connected to the support by bolts, and the third mounting hole is used to connect the clamping unit.

[0009] The clamping unit consists of a first screw, a pressure plate, a nut, a second screw, and a pad. The first screw is fixedly mounted on the support unit through a third mounting hole. The pressure plate is threadedly connected to the first screw. The nut is mounted on the first screw. The second screw is threadedly connected to the pressure plate. The pad is located below the second screw.

[0010] The right screw and the left screw rotate in opposite directions, so that the right nut and the left nut can move in opposite directions.

[0011] The height of the support unit should be higher than the height of the right nut and the left nut in order to achieve the function of clamping the workpiece.

[0012] The pad is set on the support plate, and its top end contacts the second screw. Its position can be moved to adapt to the function of pressing the workpiece in different positions.

[0013] The side of the pressure plate that rests against the pad should be higher than the side that rests against the workpiece, so that rotating the nut can achieve the function of clamping the workpiece.

[0014] Compared with the prior art, the present invention provides a CNC milling machine fixture for stepped flanges, which has the following beneficial effects.

[0015] This CNC milling machine fixture for stepped flanges features precise positioning and high rigidity. Internal centering, combined with external multi-point adjustable clamping, creates a stable "internal support and external pressure" clamping system, effectively suppressing machining vibration and deformation. It offers excellent machining accessibility, with the workpiece's outer diameter and end face fully exposed without interference, facilitating multi-process, all-around machining.

[0016] This CNC milling machine fixture for stepped flanges is highly versatile, with replaceable nut seats and adjustable clamping unit position and height, adaptable to different stepped flanges within a certain size range. It offers high clamping efficiency, enabling rapid centering, clamping, and loosening, significantly reducing auxiliary time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the base.

[0019] Figure 3 This is a schematic diagram of the transmission unit.

[0020] Figure 4This is a schematic diagram of the support unit.

[0021] Figure 5 This is a schematic diagram of the clamping unit.

[0022] Figure 6 This is a top view of the overall structure.

[0023] In the diagram: base 100, transmission unit 200, support unit 300, clamping unit 400, workpiece 500, guide rail 101, first mounting hole 102, fixed seat 103, first bearing 104, support seat 105, second bearing 106, second mounting hole 107, right nut 201, right nut seat 202, right screw 203, limit block 204, left nut 205, left nut seat 206, left screw 207, crank handle 208, support 301, support plate 302, third mounting hole 303, first screw 401, pressure plate 402, nut 403, second screw 404, pad 405. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] like Figure 1-6 As shown, a CNC milling machine fixture for a stepped flange includes a base 100, a transmission unit 200, a support unit 300, a clamping unit 400, and a workpiece 500; characterized in that: the base 100 is fixedly mounted on the milling machine worktable by bolts, the transmission unit 200 is disposed on the base 100, the support unit 300 is fixedly mounted on the base 100 by bolts, and the clamping unit 400 is mounted on the support unit 300.

[0026] In one embodiment of the present invention, the base 100 is composed of a guide rail 101, a first mounting hole 102, a fixed seat 103, a first bearing 104, a support seat 105, a second bearing 106, and a second mounting hole 107. The guide rail 101 is fixedly mounted on the base 100. The first mounting hole 102 is fixedly connected to the milling machine table by bolts. The fixed seat 103 is connected to the base 100 by bolts. The first bearing 104 is disposed on the bearing seat 103. The support seat 105 is connected to the base 100 by bolts. The second bearing 106 is disposed on the support seat 105. The second mounting hole 107 is used to connect the support unit 300.

[0027] In one embodiment of the present invention, the transmission unit 200 comprises a right nut 201, a right nut seat 202, a right screw 203, a limiting block 204, a left nut 205, a left nut seat 206, a left screw 207, and a crank handle 208; the right nut 201 is disposed on the right screw 203, the right nut seat 202 is fixedly connected to the right nut 201, the limiting block 204 is fixedly disposed in the middle of the transmission unit 200, the left nut 205 is disposed on the left screw 207, the left nut seat 206 is fixedly connected to the left nut 205, and the crank handle 208 is connected to the transmission unit 200 by a key.

[0028] In one embodiment of the present invention, the support unit 300 is composed of a support 301, a support plate 302 and a third mounting hole 303; the support 301 is fixedly mounted on the base 100 through the second mounting hole 107, the support plate 302 is fixedly connected to the support 301 by bolts, and the third mounting hole 303 is used to connect the clamping unit 400.

[0029] In one embodiment of the present invention, the clamping unit 400 is composed of a first screw 401, a pressure plate 402, a nut 403, a second screw 404, and a pad (405). The first screw (401) is fixedly mounted on the support unit (300) through a third mounting hole (303). The pressure plate (402) is threadedly connected to the first screw (401). The nut (403) is mounted on the first screw (401). The second screw (404) is threadedly connected to the pressure plate (402). The pad (405) is disposed below the second screw (404).

[0030] In one embodiment of the present invention, the right screw 203 and the left screw 207 rotate in opposite directions, so that the right nut 201 and the left nut 205 can move in opposite directions.

[0031] In one embodiment of the present invention, the height of the support unit 300 should be higher than the height of the right nut 201 and the left nut 205, so as to achieve the function of clamping the workpiece 500.

[0032] In one embodiment of the present invention, the pad 405 is disposed on the support plate 302, and its top end is in contact with the second screw 404. Its position can be moved to adapt to the function of pressing the workpiece 500 in different positions.

[0033] In one embodiment of the present invention, the side of the pressure plate 402 that is against the pad block should be higher than the side that is against the workpiece, so that rotating the nut 403 can achieve the function of pressing the workpiece 500.

[0034] This invention discloses a CNC milling machine fixture for a stepped flange. A crank handle 208 is connected to a transmission unit 200 via a key. Rotating the first crank handle 208 enables the transmission unit 200 to rotate. Rotating the crank handle 208 forward causes the right nut 201 and left nut 205 to move towards each other on the right screw 202 and left screw 207, respectively, thus clamping the workpiece 500 from the inside. Tightening the nut 403 presses the workpiece 500 with the pressure plate 402. Rotating the crank handle 208 in the reverse direction causes the right nut 201 and left nut 205 to move away from each other on the right screw 202 and left screw 207, thus releasing the workpiece 500. Loosening the nut 403 releases the workpiece 500 with the pressure plate 402.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A CNC milling machine fixture for a stepped flange, comprising a base (100), a transmission unit (200), a support unit (300), a clamping unit (400), and a workpiece (500); characterized in that: The base (100) is fixedly mounted on the milling machine worktable by bolts, the transmission unit (200) is set on the base (100), the support unit (300) is fixedly mounted on the base (100) by bolts, and the clamping unit (400) is mounted on the support unit (300).

2. A CNC milling machine fixture for a stepped flange according to claim 1, characterized in that: The base (100) is composed of a guide rail (101), a first mounting hole (102), a fixed seat (103), a first bearing (104), a support seat (105), a second bearing (106), and a second mounting hole (107). The guide rail (101) is fixedly mounted on the base (100). The first mounting hole (102) is fixedly connected to the milling machine table by bolts. The fixed seat (103) is connected to the base (100) by bolts. The first bearing (104) is set on the bearing seat (103). The support seat (105) is connected to the base (100) by bolts. The second bearing (106) is set on the support seat (105). The second mounting hole (107) is used to connect the support unit (300).

3. A CNC milling machine fixture for a stepped flange according to claim 1, characterized in that: The transmission unit (200) consists of a right nut (201), a right nut seat (202), a right screw (203), a limiting block (204), a left nut (205), a left nut seat (206), a left screw (207), and a crank handle (208). The right nut (201) is mounted on the right screw (203), the right nut seat (202) is fixedly connected to the right nut (201), the limiting block (204) is fixedly mounted in the middle of the transmission unit (200), the left nut (205) is mounted on the left screw (207), the left nut seat (206) is fixedly connected to the left nut (205), and the crank handle (208) is connected to the transmission unit (200) via a key.

4. A CNC milling machine fixture for a stepped flange according to claim 1, characterized in that: The support unit (300) consists of a support (301), a support plate (302) and a third mounting hole (303); the support (301) is fixedly mounted on the base (100) through the second mounting hole (107), the support plate (302) is fixedly connected to the support (301) by bolts, and the third mounting hole (303) is used to connect the clamping unit (400).

5. A CNC milling machine fixture for a stepped flange according to claim 1, characterized in that: The clamping unit (400) consists of a first screw (401), a pressure plate (402), a nut (403), a second screw (404), and a pad (405). The first screw (401) is fixedly mounted on the support unit (300) through a third mounting hole (303). The pressure plate (402) is threadedly connected to the first screw (401). The nut (403) is mounted on the first screw (401). The second screw (404) is threadedly connected to the pressure plate (402). The pad (405) is located below the second screw (404).

6. A CNC milling machine fixture for a stepped flange according to claim 3, characterized in that: The right screw (203) and the left screw (207) rotate in opposite directions, so that the right nut (201) and the left nut (205) can move in opposite directions.

7. A CNC milling machine fixture for a stepped flange according to claim 4, characterized in that: The height of the support unit (300) should be higher than the height of the right nut (201) and the left nut (205) in order to achieve the function of clamping the workpiece (500).

8. A CNC milling machine fixture for a stepped flange according to claim 5, characterized in that: The pad (405) is set on the support plate (302), and its top end is in contact with the second screw (404). Its position can be moved to adapt to the function of pressing the workpiece (500) in different positions.

9. A CNC milling machine fixture for a stepped flange according to claim 5, characterized in that: The side of the pressure plate (402) that is against the pad should be higher than the side that is against the workpiece, so that rotating the nut (403) can achieve the function of pressing the workpiece (500).

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