A special fixture for horizontal milling of rack anchor bolt holes

Abstract

A special fixture for horizontal milling of rack anchor bolt hole belongs to the technical field of metal cutting processing fixture, solves the problems of insufficient positioning accuracy, difficulty in meeting high-precision processing requirements, complex fixture adjustment process, cumbersome operation, low processing efficiency and poor adaptability of existing processing fixtures. Including the fixture base, the upper side of the middle part of the vertical plate on the fixture base is provided with two groups of tool setting grooves, the front side of the vertical plate is provided with a workpiece positioning pin, the lower side of the anchor workpiece transmission hole of the anchor workpiece is provided with an adjustable supporting nail; The left and right sides of the vertical plate and the anchor workpiece base are movably provided with a workpiece pressing plate, the driving end of the workpiece pressing plate is connected with the cylinder extension part of the clamping cylinder on the two sides; The tool setting block on the upper end of the tool setting base on the rear side of the vertical plate is provided with a tool setting plug gauge. Its design is reasonable, the structure is compact, the positioning accuracy and stability of the fixture can be improved, the adjustment operation is simplified, the processing efficiency is improved, and the processing requirements of different specifications of transmission shaft supports can be met.

Description

Technical Field

[0001] This utility model belongs to the field of metal cutting and machining fixture technology, specifically relating to a special fixture for horizontal milling of machine frame anchor bolt holes. Background Technology

[0002] As a key component, the machining accuracy and assembly efficiency of the drive shaft bracket play a decisive role in product quality and production efficiency. The drive shaft bracket fixture, as a crucial auxiliary tool in the machining process, directly determines the manufacturing quality of the bracket. However, most existing drive shaft bracket machining fixtures are based on traditional mechanical structure designs. While they can meet basic positioning and clamping requirements, their positioning accuracy is insufficient, making it difficult to meet the demands of high-precision machining. Furthermore, the fixture adjustment process is complex and cumbersome, impacting machining efficiency. In addition, the fixtures have poor adaptability; different fixtures are required for different specifications of drive shaft brackets, increasing manufacturing and time costs. Therefore, it is necessary to improve the existing fixtures for machining frame anchor bolt holes. Utility Model Content

[0003] This utility model addresses the aforementioned problems by providing a special fixture for horizontal milling of machine frame anchor bolt holes. This fixture improves the positioning accuracy and stability of the fixture, optimizes the fixture structure, simplifies adjustment operations, increases processing efficiency, adapts to the processing needs of different specifications of drive shaft brackets, and reduces manufacturing and time costs.

[0004] The technical solution adopted by this utility model is as follows: the special fixture for horizontal milling of machine frame anchor bolt holes includes a fixture base, characterized in that: a vertical plate is provided on the fixture base, two sets of tool setting grooves are provided on the upper side of the middle part of the vertical plate, and workpiece positioning pins are provided on the front side of the vertical plate next to the tool setting grooves. A horizontally arranged machine frame anchor workpiece to be processed is provided in front of the middle part of the vertical plate. The anchor workpiece base is placed on the workpiece support plate directly below the tool setting grooves and positioned by the workpiece positioning pins. An adjustable support pin is provided on the lower side of the anchor workpiece transmission hole at the upper end of the anchor workpiece side arm. The workpiece base has workpiece pressure plates movably mounted on both sides. The vertical plate has horizontally arranged clamping cylinders on both sides, with the cylinder extension / retraction parts of the clamping cylinders facing the corresponding workpiece pressure plates. The driving ends of the workpiece pressure plates are connected to the extension / retraction parts of the clamping cylinders on both sides. A tool setting base is located on the rear side of the vertical plate, directly below the two sets of tool setting slots. An L-shaped tool setting block is located at the upper end of the tool setting base, and tool setting gauges are located on the upper side and side elevation of the tool setting block. The fixture base also has pneumatic clamping buttons and pneumatic release buttons.

[0005] The front side of the upright plate and the left and right sides of the two sets of tool slots are respectively fixedly provided with pressure plate hinge supports. The middle part of the workpiece pressure plate is rotatably connected to the pressure plate hinge supports, and the driving end of the workpiece pressure plate away from the machine frame foot workpiece is provided with a pressure plate flipping drive roller. The extension and retraction of the clamping cylinder drives the pressure plate at the driving end of the workpiece pressure plate to flip and rotate, thereby driving the workpiece pressure plate to swing back and forth around the rotation axis on the pressure plate hinge support, thereby clamping the two sides of the foot workpiece base of the machine frame foot workpiece, facilitating the subsequent milling of the foot workpiece bolt holes on the foot workpiece base.

[0006] The clamping cylinder has a wedge-shaped block hinged to its telescopic section. The inclined surface of the wedge-shaped block contacts the rotating roller of the workpiece pressure plate drive end. Furthermore, a wedge-shaped sliding pad is provided on the front side of the vertical plate, corresponding to the wedge-shaped block. The linear motion of the clamping cylinder is converted into the oscillation of the workpiece pressure plate around the hinged support by the coordinated transmission of the inclined surface of the wedge-shaped block on the telescopic section and the rotating roller of the workpiece pressure plate end. Moreover, the wedge-shaped sliding pad guides and prevents wear on the reciprocating movement of the wedge-shaped block.

[0007] A pressure plate return spring is provided between the pressure plate flipping drive roller and the pressure plate hinge support. One end of the pressure plate return spring is connected to the workpiece pressure plate body, and the other end is connected to the vertical plate. This allows the pressure plate return spring to assist in the reset of the workpiece pressure plate during the retraction of the clamping cylinder's telescopic part.

[0008] The adjustable support pin includes a support pin body, which is vertically inserted into a support pin mounting hole on the front side of the middle part of the fixture base. A locking nut is provided on the upper part of the support pin body. The locking nut allows for flexible adjustment of the support height of the adjustable support pin, facilitating the adjustment of the placement height of the workpiece at the transmission hole end of the machine frame base.

[0009] The clamp base has mounting holes at its four corners, and cylinder bases for adjusting the height of the clamping cylinders are also provided on the upper plate and the left and right sides of the clamp base. The clamp base is fixed in position via the mounting holes, and the cylinder bases are used to adjust the height of the clamping cylinders, facilitating the use of the device.

[0010] Two sets of base positioning keys are also provided in the middle of the lower side of the fixture base. The base positioning keys are used to facilitate the installation and positioning of the fixture base.

[0011] The beneficial effects of this utility model are as follows: This utility model uses a fixture base with a vertical plate. Two sets of tool setting grooves are provided on the upper side of the middle of the vertical plate. Workpiece positioning pins are provided on the front side of the vertical plate, next to the tool setting grooves. The workpiece base of the machine frame is placed on the workpiece support plate directly below the tool setting grooves and positioned by the workpiece positioning pins. Adjustable support pins are provided on the lower side of the workpiece transmission hole at the upper end of the workpiece side arm. Workpiece pressure plates are movably arranged on the front side of the vertical plate and on the left and right sides of the workpiece base. Horizontally arranged clamping cylinders are provided on the left and right sides of the vertical plate, and the driving ends of the workpiece pressure plates are respectively connected to the cylinders of the clamping cylinders on both sides. The telescopic parts are connected; tool setting bases are respectively set on the rear side of the upright plate and directly below the two sets of tool setting slots. Tool setting blocks are set on the upper end of the tool setting bases, and tool setting feeler gauges are set on the tool setting blocks. The fixture base is equipped with pneumatic clamping buttons and pneumatic release buttons. Therefore, its design is reasonable and compact, which can improve the positioning accuracy and stability of the fixture, optimize the fixture structure, simplify adjustment operations, effectively improve processing efficiency, and consider the versatility and modular design of the fixture, so as to adapt to the processing needs of different specifications of drive shaft brackets, reduce manufacturing costs and time costs, and provide strong technical support for the efficient and high-precision processing of drive shaft brackets. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 A-direction view.

[0014] Figure 3 yes Figure 1 A schematic diagram of a connection structure between the fixture base and the upright plate.

[0015] Figure 4 yes Figure 3 View B.

[0016] Figure 5 yes Figure 1 A schematic diagram of an adjustable support pin in a circuit.

[0017] Figure 6 yes Figure 1 A schematic diagram of a connection structure between the cylinder extension part of the clamping cylinder and the wedge block, and between the wedge block and the workpiece pressure plate.

[0018] Figure 7 yes Figure 1 A schematic diagram of the structure of the frame foot workpiece in the machine.

[0019] The numbers in the diagram are explained as follows: 1. Fixture base; 2. Vertical plate; 3. Tool slot; 4. Workpiece positioning pin; 5. Frame foot workpiece; 6. Adjustable support pin; 7. Clamping cylinder; 8. Cylinder telescopic part; 9. Wedge block; 10. Workpiece pressure plate; 11. Pneumatic clamping button; 12. Pneumatic release button; 13. Tool base; 14. Tool block; 15. Tool gauge; 16. Workpiece support plate; 17. Support pin mounting hole; 18. Cylinder base; 19. Wedge block sliding pad; 20. Pressure plate hinge support; 21. Base mounting hole; 22. Base positioning key; 23. Support pin body; 24. Locking nut; 25. Pressure plate flipping drive roller; 26. Pressure plate return spring; 27. Foot workpiece base; 28. Foot workpiece side arm; 29. ​​Foot workpiece transmission hole; 30. Foot workpiece bolt hole. Detailed Implementation

[0020] according to Figures 1-7 The specific structure of this utility model is described in detail. This special fixture for horizontal milling of anchor bolt holes includes a fixture base 1. A horizontally arranged vertical plate 2 is provided on the rear side of the fixture base 1. Two sets of tool setting grooves 3 are provided on the upper side of the middle of the vertical plate 2. Two sets of base positioning keys 22 are provided in the middle of the lower side of the fixture base 1 to facilitate the installation and positioning of the fixture base 1. Furthermore, base mounting holes 21 are provided at the four corners of the fixture base 1. Cylinder bases 18 for adjusting the height of the clamping cylinder 7 are provided on the upper part of the fixture base 1 and on the left and right sides of the vertical plate 2. The position of the fixture base 1 is fixed through the base mounting holes 21, and the arrangement height of the clamping cylinder 7 is adjusted using the cylinder bases 18, facilitating the use of the device.

[0021] On the front side of the upright plate 2, next to a set of tool setting grooves 3, a workpiece positioning pin 4 is provided. At the front of the middle of the upright plate 2, a horizontally arranged frame foot workpiece 5 to be processed is provided. The foot workpiece base 27 of the horizontally arranged frame foot workpiece 5 is placed on the workpiece support plate 16 directly below the two sets of tool setting grooves 3, and is positioned by the workpiece positioning pin 4. Simultaneously, an adjustable support pin 6 is provided below the foot workpiece transmission hole 29 at the upper end of the foot workpiece side arm 28 of the frame foot workpiece 5. The adjustable support pin 6 includes a support pin body 23, which is vertically inserted into the support pin mounting hole 17 on the front side of the middle of the fixture base 1. A locking nut 24 is provided on the upper part of the support pin body 23, thereby flexibly adjusting the support height of the adjustable support pin 6 using the locking nut 24, facilitating the adjustment of the placement height of one end of the frame foot workpiece 5 at the foot workpiece transmission hole 29.

[0022] Workpiece pressure plates 10 are movably mounted on the front side of the upright plate 2 and on the left and right sides of the base 27 of the frame footing workpiece 5. Furthermore, pressure plate hinge supports 20 are fixedly mounted on the front side of the upright plate 2 and on the left and right sides of the two sets of tool setting grooves 3. The middle part of the workpiece pressure plate 10 is rotatably connected to the pressure plate hinge support 20. A pressure plate flipping drive roller 25 is mounted on the drive end of the workpiece pressure plate 10 away from the frame footing workpiece 5. Then, the extension and retraction of the clamping cylinder 7 drives the pressure plate flipping drive roller 25 at the drive end of the workpiece pressure plate 10 to move, thereby driving the workpiece pressure plate 10 to reciprocate around the rotation axis on the pressure plate hinge support 20, clamping both sides of the base 27 of the frame footing workpiece 5, facilitating subsequent milling of the bolt holes 30 on the base 27. Furthermore, a pressure plate return spring 26 is provided between the pressure plate flipping drive roller 25 and the pressure plate hinge support 20. One end of the pressure plate return spring 26 is connected to the plate body of the workpiece pressure plate 10, and the other end of the pressure plate return spring 26 is connected to the vertical plate 2. In order to assist the workpiece pressure plate 10 in resetting when it is released during the retraction of the cylinder extension part 8 of the clamping cylinder 7.

[0023] Clamping cylinders 7 are symmetrically arranged on the left and right sides of the fixture base 1 and the upright plate 2. The clamping cylinders 7 are horizontally arranged on the cylinder base 18 on the corresponding side, and the cylinder extension parts 8 of the clamping cylinders 7 on both sides are arranged towards the workpiece pressure plate 10 on the corresponding side. Furthermore, the pressure plate flipping drive roller 25 at the driving end of the workpiece pressure plate 10 is connected to the wedge blocks 9 hinged on the cylinder extension parts 8 of the clamping cylinders 7 on both sides. The inclined surface of the wedge block 9 is in contact with the pressure plate flipping drive roller 25 at the driving end of the workpiece pressure plate 10. Wedge block sliding pads 19 are also provided on the front side of the upright plate 2 at the position corresponding to the wedge block 9. Thus, by utilizing the cooperation between the inclined surface of the wedge block 9 provided in the cylinder telescopic part 8 and the pressure plate flipping drive roller 25 at the end of the workpiece pressure plate 10, the linear motion of the clamping cylinder 7 is converted into the swing of the workpiece pressure plate 10 around the pressure plate hinge support 20 (clamping foot workpiece base 27); in addition, the wedge block sliding pad 19 is used to guide and prevent wear of the reciprocating movement of the wedge block 9.

[0024] On the rear side of the upright plate 2, directly below the two sets of tool setting slots 3, vertically arranged tool setting bases 13 are symmetrically arranged. The lower end of the tool setting base 13 is connected to the fixture base 1, and the upper end of the tool setting base 13 is provided with an L-shaped tool setting block 14. Furthermore, a tool setting gauge 15 is provided on the upper side and side elevation of the L-shaped tool setting block 14, which is used to determine the radial position of the milling tool feed. On the fixture base 1, on the left and right sides of the workpiece 5 under the machine frame foot, pneumatic clamping buttons 11 and pneumatic release buttons 12 are also provided, respectively.

[0025] When using the special fixture for horizontal milling of machine frame anchor bolt holes, firstly, the fixture base 1 is positioned and installed in the T-slot of the horizontal milling machine's worktable using the base positioning key 22, and the position of the fixture base 1 is fixed by the base mounting fixing hole 21. Next, the machine frame anchor workpiece 5 to be processed is horizontally arranged on the fixture base 1, so that the machine frame anchor workpiece 5 is located in front of the middle of the vertical plate 2. Simultaneously, the anchor workpiece base 27 of the machine frame anchor workpiece 5 is placed against the vertical plate 2 and on the workpiece support plate 16 directly below the two sets of tool setting slots 3, and positioned by the workpiece positioning pin 4. Then, the adjustable support pin 6 provided on the lower side of the anchor workpiece transmission hole 29 of the machine frame anchor workpiece 5 is used to flexibly adjust the support height, thereby adjusting the placement height of one end of the anchor workpiece transmission hole 29 of the machine frame anchor workpiece 5. After the frame foot workpiece 5 is placed in place, press the pneumatic clamping button 11. This extends the clamping cylinder 7, driving the wedge block 9 to move. This, in turn, drives the workpiece pressure plate 10 to swing around the rotation axis on the pressure plate hinge support 20 towards the foot workpiece base 27, thus clamping the foot workpiece base 27 of the frame foot workpiece 5. Then, the milling cutter is set using the tool setting block 14 and tool setting gauge 15 located behind the vertical plate 2, ensuring the correct position of the tool during machining. Afterward, the horizontal machine tool mills the foot workpiece bolt holes 30 on the foot workpiece base 27. Once machining is complete, press the pneumatic release button 12 to release the clamping of the workpiece by the workpiece pressure plate 10, and remove the machined frame foot workpiece 5.

Claims

1. A special fixture for horizontal milling of machine frame anchor bolt holes, comprising a fixture base (1), characterized in that: The fixture base (1) is provided with a vertical plate (2). Two sets of tool setting grooves (3) are provided on the upper side of the middle part of the vertical plate (2). Workpiece positioning pins (4) are provided on the front side of the vertical plate (2) and next to the tool setting grooves (3). A horizontally arranged frame foot workpiece (5) to be processed is provided in front of the middle part of the vertical plate (2). The foot workpiece base (27) of the frame foot workpiece (5) is placed on the workpiece support plate (16) directly below the tool setting groove (3) and positioned by the workpiece positioning pins (4). An adjustable support pin (6) is provided on the lower side of the foot workpiece transmission hole (29) at the upper end of the foot workpiece side arm (28). Workpieces are movably provided on the front side of the vertical plate (2) and on the left and right sides of the foot workpiece base (27) of the frame foot workpiece (5). The workpiece pressure plate (10) and the upright plate (2) are respectively provided with horizontally arranged clamping cylinders (7). The cylinder extension parts (8) of the clamping cylinders (7) are arranged in the direction of the corresponding workpiece pressure plate (10), and the driving end of the workpiece pressure plate (10) is connected to the cylinder extension parts (8) of the clamping cylinders (7) provided on both sides. The rear side of the upright plate (2) and the position directly below the two sets of tool setting grooves (3) are respectively provided with tool setting bases (13). The upper end of the tool setting base (13) is provided with an L-shaped tool setting block (14). The upper side and the side elevation of the tool setting block (14) are respectively provided with tool setting gauges (15). The fixture base (1) is also provided with a pneumatic clamping button (11) and a pneumatic release button (12).

2. The special fixture for horizontal milling of machine frame anchor bolt holes according to claim 1, characterized in that: The front side of the upright plate (2) and the left and right sides of the two sets of tool slots (3) are respectively fixed with pressure plate hinge supports (20). The middle part of the workpiece pressure plate (10) is rotatably connected to the pressure plate hinge support (20), and the workpiece pressure plate (10) is provided with a pressure plate flipping drive roller (25) at the driving end away from the workpiece (5) of the machine frame foot.

3. The special fixture for horizontal milling of machine frame anchor bolt holes according to claim 2, characterized in that: The cylinder extension part (8) of the clamping cylinder (7) is hinged with a wedge block (9). The inclined surface of the wedge block (9) is in contact with the pressure plate flipping drive roller (25) at the drive end of the workpiece pressure plate (10). Furthermore, a wedge block sliding pad (19) is provided on the front side of the upright plate (2) at a position corresponding to the wedge block (9).

4. The special fixture for horizontal milling of anchor bolt holes in a machine frame according to claim 2, characterized in that: A pressure plate return spring (26) is provided between the pressure plate flipping drive roller (25) and the pressure plate hinge support (20). One end of the pressure plate return spring (26) is connected to the plate body of the workpiece pressure plate (10), and the other end of the pressure plate return spring (26) is connected to the vertical plate (2).

5. The special fixture for horizontal milling of anchor bolt holes in a machine frame according to claim 1, characterized in that: The adjustable support pin (6) includes a support pin body (23), which is vertically inserted into the support pin mounting hole (17) on the front side of the middle part of the clamp base (1), and a locking nut (24) is provided on the upper part of the support pin body (23).

6. The special fixture for horizontal milling of anchor bolt holes in machine frames according to claim 1, characterized in that: The clamp base (1) is provided with base mounting and fixing holes (21) at the four corners, and cylinder bases (18) for adjusting the height of clamping cylinder (7) are provided on the clamp base (1) and the left and right sides of the upright plate (2).

7. The special fixture for horizontal milling of anchor bolt holes in a machine frame according to claim 1, characterized in that: Two sets of base positioning keys (22) are also provided in the middle of the lower side of the fixture base (1).

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