A pneumatic internal expansion type milling machine fixture

Abstract

The present invention discloses a pneumatic internal expansion type milling machine fixture, including a mounting frame, the mounting frame is fixedly connected with a cylinder, the cylinder has a chamber, the chamber is provided with a plurality of movable blocks that can be extended in and out, the plurality of movable blocks are equidistantly distributed in the cylinder, the mounting frame is fixedly installed with a cylinder, the output end of the cylinder is fixedly connected with a movable shaft, the movable shaft extends into the chamber, the movement of the movable shaft can control the extension and extension of the plurality of movable blocks, the mounting frame is fixedly connected with an expansion component, the extension of the movable block can make the expansion component expand, so as to clamp the processing parts that need to be clamped. The present invention sets an expansion component, uses the cylinder to drive the expansion component to expand outward, and performs internal expansion clamping on the inner wall of the processing part, so as to avoid damage to the surface of the workpiece caused by the clamping and positioning. At the same time, the clamp of the present invention can save time and effort in clamping the workpiece, is fast and convenient, has a short auxiliary time, is highly efficient, and has a good positioning and guiding for the parts.

Description

Technical Field

[0001] The invention relates to the technical field of milling machines, in particular to a pneumatic internal expansion type milling machine fixture. Background Art

[0002] Milling machines mainly refer to machine tools that use milling cutters to process various surfaces of workpieces. When the milling machine is working, the workpiece is mounted on a workbench or an accessory such as a dividing head. The rotation of the milling cutter is the main motion, supplemented by the feed motion of the workbench or the milling head, and the workpiece can obtain the required processing surface. When using a milling machine to mill a workpiece, the workpiece should be accurately clamped on the fixture first, and the clamping accuracy directly affects the processing accuracy.

[0003] The patent document with publication number CN211249217U and name of fixing fixture for milling machine discloses a fixing fixture for milling machine, which comprises a milling machine body and a workbench arranged on the milling machine body, the workbench is provided with a base, a fixing block is provided on the base, the top surface of the fixing block is provided with a lower groove, an abutment block is provided above the fixing block, an upper groove corresponding to the upper groove is provided on the bottom surface of the abutment block, and a workpiece clamping groove is formed between the upper groove and the lower groove; a mounting hole is provided through the top of the abutment block, a first screw rod is provided in the mounting hole, the bottom end of the first screw rod passes through the mounting hole and is connected to the fixing block, a first ball is provided on the first screw rod, the first ball is connected to the abutment block, a driving member for driving the first screw rod to rotate is provided on the abutment block, and a limiting member for preventing the abutment block from following the rotation of the first ball is provided on the abutment block.

[0004] The above technical solution can effectively improve the machining accuracy of the milling machine by providing a fixed block and an abutment block, and the fixed block and the abutment block are jointly provided with a workpiece clamping groove, and the fixed block is provided with a first screw rod for driving the abutment block to move up and down. However, the inventor also found that the above technical solution still has the following defects:

[0005] The milling machine fixture structure of the prior art is relatively complex, the clamping is relatively troublesome, the auxiliary time is long, which affects the work efficiency, and multiple clamping and positioning are required, which easily causes damage to the workpiece surface and affects the processing quality of the workpiece. Summary of the invention

[0006] The purpose of the present invention is to provide a pneumatic internal expansion type milling machine fixture to avoid damage to the workpiece surface caused by clamping and positioning.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A pneumatic internal expansion milling machine fixture comprises a mounting frame, the mounting frame is fixedly connected to a cylinder, the cylinder has a chamber, the chamber is provided with a plurality of movable blocks which can be extended in and out, the plurality of movable blocks are equidistantly distributed around the cylinder, the mounting frame is fixedly mounted with a cylinder, the output end of the cylinder is fixedly connected to a movable shaft, the movable shaft extends into the chamber, the movement of the movable shaft can control the extension and extension of the plurality of movable blocks, the mounting frame is fixedly connected to an expansion component, the extension of the movable block can cause the expansion component to expand, thereby clamping the processing parts to be clamped.

[0009] Preferably, the mounting frame includes an upper plate body and a lower plate body, the upper plate body and the lower plate body are fixedly connected by a plurality of connecting columns, the upper plate body is provided with a circular groove, the inner circumferential side wall of the circular groove is fixedly connected to the cylindrical body, the lower plate body is fixedly connected with a plurality of mounting plates, and the mounting plates are connected to corresponding parts of the milling machine through bolt and nut assemblies.

[0010] Preferably, a support ring is fixedly connected in the chamber, the moving block is located on the support ring, the moving block can extend into and out of the cylinder to form an outlet, both ends of the moving block are rounded, and the end of the moving axis facing the moving block is also rounded.

[0011] Preferably, the movable block is provided with a control groove, a cross bar is fixedly connected in the control groove, a control block is also slidably connected in the control groove, the control block is fixedly connected to the chamber, the cross bar passes through the control block, an elastic member is sleeved on the outer wall of the cross bar, the two ends of the elastic member are respectively connected to the control groove and the control block, and under the elastic force of each elastic member, each movable block moves toward the center of the chamber.

[0012] Preferably, the expansion component includes an elastic expansion sleeve, which is made of an elastically deformable material. The elastic expansion sleeve is annular and fixedly connected to the upper plate. The elastic expansion sleeve is sleeved on the outer wall of the cylinder. The elastic expansion sleeve is provided with a plurality of circumferentially equidistantly distributed rows of grooves, and an expansion area is formed between two adjacent rows of grooves, and the expansion area corresponds to the moving block.

[0013] Preferably, the expansion component includes an extension plate rotatably connected to one end of the moving block, a fixing ring is fixedly connected to the upper plate body, the fixing ring is provided with a plurality of circumferentially equidistant limiting grooves, and the extension plate is slidably connected to the corresponding limiting grooves.

[0014] Preferably, an extendable growth component is provided at the end of the extension plate away from the moving block.

[0015] Preferably, the growth component is a growth plate, the growth plate can slide in the extension plate, and a component capable of controlling the extension length of the growth plate is provided in the extension plate.

[0016] Preferably, the component for controlling the extension length of the growth plate is a hydraulic cylinder, the hydraulic cylinder is fixedly installed in the extension plate, and the output shaft of the hydraulic cylinder is fixedly connected to the growth plate.

[0017] Preferably, the component that controls the extension length of the growth plate is a rotating motor, which is fixedly installed in the extension plate, and the output shaft of the rotating motor is fixedly connected to a threaded rod, the growth plate is provided with a threaded groove adapted to the threaded rod, and the threaded rod is threadedly connected to the threaded groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides an expansion component and utilizes a cylinder to drive the expansion component to expand outward, thereby performing an internal expansion clamping on the inner wall of the processed part to avoid damage to the workpiece surface caused by clamping and positioning. At the same time, the clamp of the present invention can clamp the workpiece in a time-saving and labor-saving manner, is quick and convenient, has a short auxiliary time, is highly efficient, and has a good positioning and guiding effect on the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a pneumatic internal expansion milling machine fixture and one of the expansion components thereof proposed by the present invention;

[0021] Figure 2 Another structural schematic diagram of a pneumatic internal expansion milling machine fixture and an expansion component therein proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a mounting frame in a pneumatic internal expansion milling machine fixture proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of a cylinder in a pneumatic internal expansion milling machine fixture proposed by the present invention;

[0024] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 6 A schematic diagram of the connection structure between a hydraulic cylinder and an expansion plate in a pneumatic internal expansion milling machine fixture proposed by the present invention;

[0026] Figure 7 The present invention is a schematic diagram of the connection structure between a rotating motor and an expansion plate in a pneumatic internal expansion milling machine fixture.

[0027] Explanation of numbers in the figure: 10, mounting frame; 11, cylinder; 12, chamber; 13, moving block; 14, cylinder; 15, moving shaft; 20, upper plate; 21, lower plate; 22, connecting column; 23, circular groove; 24, mounting plate; 30, supporting ring; 31, outlet; 32, control groove; 33, cross bar; 34, control block; 35, elastic part; 40, elastic expansion sleeve; 41, column groove; 42, extension plate; 43, fixing ring; 44, limit groove; 45, growth plate; 46, hydraulic cylinder; 47, rotating motor; 48, threaded rod; 49, threaded groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-Figure 7 A pneumatic internal expansion milling machine fixture includes a mounting frame 10, the mounting frame 10 is fixedly connected to a cylinder 11, the cylinder 11 has a chamber 12, the chamber 12 is provided with a plurality of movable blocks 13 that can be extended in and out, the plurality of movable blocks 13 are equidistantly distributed around the cylinder 11, the mounting frame 10 is fixedly installed with a cylinder 14, the cylinder 14 is a prior art and will not be described in detail herein, the output end of the cylinder 14 is fixedly connected to a movable shaft 15, the cylinder 14 can drive the movement of the movable shaft 15, the movable shaft 15 extends into the chamber 12, the movement of the movable shaft 15 can control the extension and extension of the plurality of movable blocks 13, the mounting frame 10 is fixedly connected with an expansion component, the extension of the movable block 13 can cause the expansion component to expand, thereby clamping the processing parts to be clamped.

[0030] Furthermore, the mounting frame 10 includes an upper plate body 20 and a lower plate body 21, and the upper plate body 20 and the lower plate body 21 are fixedly connected by a plurality of connecting columns 22. The upper plate body 20 is provided with a circular groove 23, and the inner peripheral side wall of the circular groove 23 is fixedly connected to the cylinder 11. The lower plate body 21 is fixedly connected with a plurality of mounting plates 24, and the mounting plates 24 are connected to corresponding parts of the milling machine through bolt and nut assemblies.

[0031] Furthermore, a support ring 30 is fixedly connected inside the chamber 12, and the moving block 13 is located on the support ring 30. The moving block 13 can extend into and out of the cylinder 11 to form an outlet 31. Both ends of the moving block 13 are rounded, and the end of the moving shaft 15 facing the moving block 13 is also rounded.

[0032] The rounded corners of the moving block 13 and the moving shaft 15 make it easier for the moving block 13 to move more smoothly and steadily when the moving shaft 15 touches the moving block 13 .

[0033] Furthermore, the moving block 13 is provided with a control groove 32, a cross bar 33 is fixedly connected in the control groove 32, a control block 34 is also slidably connected in the control groove 32, the control block 34 is fixedly connected to the chamber 12, the cross bar 33 passes through the control block 34, an elastic member 35 is sleeved on the outer wall of the cross bar 33, and both ends of the elastic member 35 are respectively connected to the control groove 32 and the control block 34, under the elastic force of each elastic member 35, each moving block 13 moves toward the center of the chamber 12.

[0034] The elastic member 35 is preferably a spring accessory. When the moving shaft 15 moves upward and touches each moving block 13 , each moving block 13 moves toward its own outlet 31 and presses the elastic member 35 .

[0035] Furthermore, the expansion component includes an elastic expansion sleeve 40, which is made of an elastically deformable material. The elastic expansion sleeve 40 is annular and fixedly connected to the upper plate 20. The elastic expansion sleeve 40 is sleeved on the outer wall of the cylinder 11. The elastic expansion sleeve 40 is provided with a plurality of circumferentially equidistantly distributed row grooves 41, and an expansion area is formed between two adjacent row grooves 41, and the expansion area corresponds to the moving block 13.

[0036] When the moving block 13 moves out of the outlet 31, it will touch the expansion areas on the elastic expansion sleeve 40, causing the expansion areas to expand outward, thereby achieving internal expansion clamping of the processed parts.

[0037] Furthermore, the expansion component includes an extension plate 42 rotatably connected to one end of the moving block 13, a fixing ring 43 is fixedly connected to the upper plate body 20, the fixing ring 43 is provided with a plurality of circumferentially equidistantly distributed limiting grooves 44, and the extension plate 42 is slidably connected to the corresponding limiting grooves 44.

[0038] However, the size of the elastic expansion sleeve 40 is limited, and the degree of outward expansion of its expansion area is also limited. In order to match the sizes of more and larger processed parts, the above-mentioned technical scheme is set up. The movable block 13 is rotatably connected to the extension plate 42. Under the limitation of the limiting groove 44, the extension plate 42 will always extend or contract in the horizontal direction. At the same time, the extension degree of the extension plate 42 is greater than the expansion degree of the elastic expansion sleeve 40.

[0039] Furthermore, an elongated member capable of extending is provided at the end of the elongated plate 42 away from the moving block 13 .

[0040] In order to further match the sizes of more and larger processed parts, the above technical solution is set up.

[0041] Furthermore, the growth component is a growth plate 45 , and the growth plate 45 can slide in the extension plate 42 . A component capable of controlling the extension length of the growth plate 45 is disposed in the extension plate 42 .

[0042] Reference Figure 6 and attached Figure 7 A slide groove is opened in the extension plate 42, and the growth plate 45 is slidably connected to the slide groove, and the growth plate 45 can be completely accommodated in the slide groove. The length of the growth plate 45 extending out of the slide groove is controlled by a component in the slide groove that controls the extension length of the growth plate 45.

[0043] Furthermore, the component for controlling the extension length of the growth plate 45 is a hydraulic cylinder 46 . The hydraulic cylinder 46 is a prior art and will not be described in detail here. The hydraulic cylinder 46 is fixedly installed in the extension plate 42 , and the output shaft of the hydraulic cylinder 46 is fixedly connected to the growth plate 45 .

[0044] The above technical solution is to drive the growth plate 45 to extend out of the extension plate 42 through the hydraulic cylinder 46 .

[0045] Furthermore, the component that controls the extension length of the growth plate 45 is a rotating motor 47. The rotating motor 47 is a prior art and will not be described in detail here. The rotating motor 47 is fixedly installed in the extension plate 42, and the output shaft of the rotating motor 47 is fixedly connected to a threaded rod 48. The growth plate 45 is provided with a threaded groove 49 that is compatible with the threaded rod 48, and the threaded rod 48 is threadedly connected to the threaded groove 49.

[0046] The above technical solution is to drive the threaded rod 48 to rotate by rotating the motor 47, thereby controlling the growth plate 45 to extend or retract the slide slot extension plate 42;

[0047] It should be noted that in order to ensure that all the growth plates 42 extend to the same length, a sticker may be provided on the growth plate 42 , and a length scale may be provided on the sticker, so that the length of the growth plate 42 extending from the extension plate 42 may be clearly checked.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pneumatic internal expansion milling machine fixture, characterized in that: The invention comprises a mounting frame (10), wherein the mounting frame (10) is fixedly connected to a cylinder (11), wherein the cylinder (11) has a chamber (12), wherein a plurality of movable blocks (13) capable of being inserted into and extended out are arranged in the chamber (12), wherein the plurality of movable blocks (13) are equidistantly distributed in the circumference of the cylinder (11), wherein the mounting frame (10) is fixedly installed with a cylinder (14), wherein the output end of the cylinder (14) is fixedly connected to a movable shaft (15), wherein the movable shaft (15) extends into the chamber (12), wherein the movement of the movable shaft (15) can control the insertion and extension of the plurality of movable blocks (13), wherein an expansion component is fixedly connected to the mounting frame (10), wherein the extension of the movable block (13) can cause the expansion component to expand, thereby clamping a workpiece to be clamped, wherein a support ring (30) is fixedly connected to the chamber (12), wherein the movable block (13) is located in the chamber (12). On the support ring (30), an outlet (31) is formed at a position where the moving block (13) can extend into and out of the cylinder (11), both ends of the moving block (13) are rounded, and the end of the moving shaft (15) facing the moving block (13) is also rounded, the moving block (13) is provided with a control groove (32), a cross bar (33) is fixedly connected in the control groove (32), a control block (34) is also slidably connected in the control groove (32), the control block (34) is fixedly connected to the chamber (12), the cross bar (33) passes through the control block (34), an elastic member (35) is sleeved on the outer wall of the cross bar (33), the two ends of the elastic member (35) are respectively connected to the control groove (32) and the control block (34), and under the elastic force of each elastic member (35), each moving block (13) moves toward the center of the chamber (12).

2. A pneumatic internal expansion milling machine fixture according to claim 1, characterized in that: The mounting frame (10) comprises an upper plate body (20) and a lower plate body (21); the upper plate body (20) and the lower plate body (21) are fixedly connected via a plurality of connecting columns (22); a circular groove (23) is provided on the upper plate body (20); the inner peripheral side wall of the circular groove (23) is fixedly connected to the cylindrical body (11); the lower plate body (21) is fixedly connected to a plurality of mounting plates (24); the mounting plates (24) are connected to corresponding parts of the milling machine via bolt and nut assemblies.

3. A pneumatic internal expansion milling machine fixture according to claim 2, characterized in that: The expansion component comprises an elastic expansion sleeve (40), the elastic expansion sleeve (40) is made of an elastically deformable material, the elastic expansion sleeve (40) is annular, and is fixedly connected to the upper plate (20), the elastic expansion sleeve (40) is sleeved on the outer wall of the cylinder (11), and the elastic expansion sleeve (40) is provided with a plurality of circumferentially equidistantly distributed row grooves (41), and an expansion area is formed between two adjacent row grooves (41), and the expansion area corresponds to the moving block (13).

4. A pneumatic internal expansion milling machine fixture according to claim 2, characterized in that: The expansion component comprises an extension plate (42) rotatably connected to one end of the moving block (13); a fixing ring (43) is fixedly connected to the upper plate body (20); the fixing ring (43) is provided with a plurality of circumferentially equidistantly distributed limiting grooves (44); and the extension plate (42) is slidably connected to the corresponding limiting grooves (44).

5. The pneumatic internal expansion milling machine fixture according to claim 4, characterized in that: An elongated component capable of extending is provided at the end of the elongated plate (42) away from the moving block (13).

6. The pneumatic internal expansion milling machine fixture according to claim 5, characterized in that: The growth component is a growth plate (45), and the growth plate (45) can slide in the extension plate (42). The extension plate (42) is provided with a component capable of controlling the extension length of the growth plate (45).

7. A pneumatic internal expansion milling machine fixture according to claim 6, characterized in that: The component for controlling the extension length of the growth plate (45) is a hydraulic cylinder (46), the hydraulic cylinder (46) is fixedly installed in the extension plate (42), and the output shaft of the hydraulic cylinder (46) is fixedly connected to the growth plate (45).

8. The pneumatic internal expansion milling machine fixture according to claim 6, characterized in that: The component for controlling the extension length of the growth plate (45) is a rotating motor (47), which is fixedly installed in the extension plate (42), and the output shaft of the rotating motor (47) is fixedly connected with a threaded rod (48), and the growth plate (45) is provided with a threaded groove (49) adapted to the threaded rod (48), and the threaded rod (48) is threadedly connected to the threaded groove (49).

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