A pressing positioning device for machining long beam structural members

Abstract

This utility model belongs to the field of defense equipment machining technology, and particularly relates to a clamping and positioning device for machining long beam structural components. Several fixtures are arranged in a straight line on a gantry machining center platform. Each fixture includes a base, the bottom of which is attached to the top of the gantry machining center platform. From left to right along the length of the platform, a rotary hydraulic cylinder, a right-type induction radially laterally mounted thin hydraulic cylinder, a left-type induction radially laterally mounted thin hydraulic cylinder, and an electric hydraulic station are sequentially connected to the top center of the base. The pistons of the right-type and left-type induction radially laterally mounted thin hydraulic cylinders extend in opposite directions and are both connected to pressure heads. The piston of the rotary hydraulic cylinder faces upwards, and a pressure rod is connected above the piston. The two ends of the pressure rod are connected to the base via screws. Stops are vertically connected to both sides of the base. This device achieves automatic workpiece alignment, rapid clamping, uniform clamping, stable positioning, and prevents movement and vibration during machining, thus avoiding localized deformation.

Description

Technical Field

[0001] This utility model belongs to the field of defense equipment machining technology, and in particular relates to a clamping and positioning device for machining long beam structural parts. Background Technology

[0002] Long beam structural components play a crucial role in missile storage and launch boxes. These components are fixed to other parts of the box via bolts, forming a unified structure that ensures structural integrity and efficient load transfer. However, traditional clamping devices often result in uneven clamping during drilling, milling of long holes, and end face milling of long beam structural components. Cutting forces and thermal stresses cause deformation of the long beam components, and unstable positioning leads to movement and vibration during drilling, causing localized deformation. Utility Model Content

[0003] The purpose of this invention is to provide a clamping and positioning device for machining long beam structural components, which solves the problems of uneven clamping and unstable positioning of traditional clamping and positioning devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A clamping and positioning device for machining long beam structural components includes a gantry machining center platform and fixtures. Several fixtures are arranged in a straight line on the gantry machining center platform, forming multiple rows, each row serving as a workstation, thus constituting multiple workstations. Each fixture includes a base, the bottom of which is attached to the top of the gantry machining center platform. A T-shaped positioning block is welded to the bottom of the base. The gantry machining center platform has T-slots, and the T-shaped positioning block and the T-slots are fitted together. A rotary hydraulic cylinder, a right-hand induction-type radially laterally mounted thin hydraulic cylinder, a left-hand induction-type radially laterally mounted thin hydraulic cylinder, and an electric hydraulic station are sequentially connected from left to right along the length direction above the base. The pistons of the right-hand radially laterally mounted thin hydraulic cylinder and the left-hand radially laterally mounted thin hydraulic cylinder extend in opposite directions, and their extension directions are perpendicular to the length direction of the base. The pistons of both cylinders are connected to pressure heads. The rotary cylinder, the right-hand radially laterally mounted thin hydraulic cylinder, and the left-hand radially laterally mounted thin hydraulic cylinder are all connected to an electric hydraulic station, which is connected to a power source. The piston of the rotary cylinder faces upward, and a pressure rod is connected above the piston. The two ends of the pressure rod are connected to the base through screws. Stops are vertically connected to both sides of the base.

[0006] Preferably, the fixtures of the adjacent workstations are symmetrically distributed.

[0007] Preferably, a conduit is installed on the gantry machining center platform to facilitate connection to an electric hydraulic station.

[0008] Preferably, the base includes a fixing plate and a bottom plate, the bottom plate is welded to the upper middle part of the fixing plate and integrally formed, the bottom of the fixing plate is fitted with the gantry machining center platform, and the two ends of the pressure rod are connected to the bottom plate by screws.

[0009] Preferably, magnetic induction sensors are installed inside the rotary cylinder, the right-sensor type radially laterally mounted thin cylinder, and the left-sensor type radially laterally mounted thin cylinder.

[0010] Preferably, the right-sensor type radially laterally mounted thin hydraulic cylinder and the left-sensor type radially laterally mounted thin hydraulic cylinder are connected to the base by bolts.

[0011] Preferably, there are two workstations.

[0012] Preferably, the stop block is replaceable, and the shape of the stop block can be changed according to the shape of the long beam workpiece.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] (1) The device has a simple structure and is easy to operate. It can clamp multiple long beam workpieces at the same time, which can meet the requirements of mass production. The right induction type radial side mounting thin oil cylinder and the left induction type radial side mounting thin oil cylinder are combined with the blocks on both sides of the base to limit the side wall of the long beam workpiece, ensuring the straightness of the long beam workpiece. The rotating oil cylinder and the pressure rod clamp the upper part of the long beam workpiece to realize the automatic alignment of the workpiece, quick clamping, and uniform clamping. The long beam structure will not be deformed due to cutting force and thermal stress. The positioning is stable, and there is no movement or vibration during processing, which will not cause local deformation.

[0015] (2) The clamps in the clamping and positioning device are flexible in assembly position, can be combined arbitrarily, the distance is adjustable, and the stop can be replaced according to the shape of the long beam workpiece, making the clamping and positioning more stable, reducing the vibration and stress generated during processing, and enhancing practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the clamp structure in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram showing the connection relationship between the base and the stop in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection relationship of the rotary cylinder in an embodiment of this utility model;

[0020] Figure 5 This is a state diagram of the present invention during the pressing and positioning process.

[0021] Explanation of reference numerals in the attached drawings: 1. Gantry machining center platform; 2. Fixture; 21. Base; 211. Fixing plate; 212. Base plate; 22. Rotary cylinder; 23. Right induction type radial lateral mounting thin cylinder; 24. Left induction type radial lateral mounting thin cylinder; 25. Electro-hydraulic station; 26. Stop block; 27. Pressure head; 28. Pressure rod; 29. ​​Screw; 3. Workpiece; 4. Conduit. Detailed Implementation

[0022] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1-4As shown, a clamping and positioning device for machining long beam structural components includes a gantry machining center platform 1 and fixtures. Several fixtures are arranged in a straight line on the gantry machining center platform, forming two rows, each row being a workstation, constituting two workstations. The fixtures of adjacent workstations are symmetrically distributed. Each fixture 2 includes a base 21, which includes a fixing plate 211 and a bottom plate 212. The bottom plate 212 is welded to the upper part of the middle of the fixing plate 211, and the fixing plate 211 and the bottom plate 212 are integrally formed. The bottom of the fixing plate 211 is attached to the upper part of the gantry machining center platform 1, and a T-shaped positioning block is welded to the bottom of the fixing plate 211. The gantry machining center platform 1 has a T-shaped groove, and the T-shaped positioning block and the T-shaped groove are fitted together. The bottom plate 212 is positioned from left to right in the middle of its upper part. A rotary cylinder 22, a right-sensor type radially laterally mounted thin-film cylinder 23, a left-sensor type radially laterally mounted thin-film cylinder 24, and an electric hydraulic station 25 are connected sequentially along the length direction. The rotary cylinder 22, the right-sensor type radially laterally mounted thin-film cylinder 23, and the left-sensor type radially laterally mounted thin-film cylinder 24 are bolted to the base plate 212. The pistons of the right-sensor type radially laterally mounted thin-film cylinder 23 and the left-sensor type radially laterally mounted thin-film cylinder 24 extend in opposite directions, perpendicular to the length direction of the base. The pistons of both the right-sensor type radially laterally mounted thin-film cylinder 23 and the left-sensor type radially laterally mounted thin-film cylinder 24 are connected to pressure heads 27. The rotary cylinder 22, the right-sensor type radially laterally mounted thin-film cylinder 23, the left-sensor type radially laterally mounted thin-film cylinder 24, and the electric hydraulic station 25 are connected in sequence along the length direction. Both the lateral-mounted thin hydraulic cylinder 23 and the left-induction radial-lateral-mounted thin hydraulic cylinder 24 are connected to the electric hydraulic station 25 via oil pipes, and the electric hydraulic station 25 is connected to a power source. The piston of the rotary cylinder 22 faces upwards, and a pressure rod 28 is connected above the piston. Both ends of the pressure rod 28 are connected to the base plate 212 of the base via screws 29. Stop blocks 26 are vertically connected to both sides of the fixed plate 211. The stop blocks 26 are replaceable, and their shape can be changed according to the shape of the long beam workpiece. A conduit 4 is installed on the gantry machining center platform 1. Magnetic induction sensors are installed inside both the right-induction radial-lateral-mounted thin hydraulic cylinder 23 and the left-induction radial-lateral-mounted thin hydraulic cylinder 24. The dual-station configuration allows for clamping four workpieces, improving production efficiency. Each workpiece... The design incorporates multiple fixtures for more stable workpiece clamping and positioning, reducing machining errors. The fixtures and gantry machining center platform utilize T-shaped positioning blocks and T-slots for enhanced stability. A conduit is incorporated to ensure orderly and concealed wiring, keeping the gantry machining center platform tidy and preventing wire damage. Right-hand and left-hand induction radially mounted thin-walled hydraulic cylinders, combined with stops on both sides of the base, limit the sidewalls of the long beam workpiece, ensuring its straightness. A rotating hydraulic cylinder and pressure rod clamp the workpiece from above, achieving multi-directional workpiece fixation, automatic alignment, rapid clamping, and uniform clamping, preventing deformation of the long beam structure due to cutting forces and thermal stress.

[0024] The clamping and positioning process is as follows: Figure 5 As shown:

[0025] Clamping: Place the workpiece 3 on both sides of the fixture 4. The bottom of the fixing plate 211 is attached to the gantry machining center platform 1 to ensure that the gap between the lower plane of the workpiece 3 and the workpiece 3 is no more than 0.3mm. The T-shaped positioning block is fitted into the T-slot of the gantry machining center platform 1. Using the T-slot as the coordinate reference, the straightness of the workpiece 3 during operation is ensured to be no more than 0.3mm. The rotating cylinder 22 of the fixture 4 can rotate 340 degrees. When rotating to the radial direction, tighten the bolts 29 at both ends of the pressure rod 28 so that the two ends of the pressure rod 28 are attached to the upper plane of the workpiece 3 to clamp the workpiece 3.

[0026] Radial positioning: The right induction radial lateral mounting thin hydraulic cylinder 23 and the left induction radial lateral mounting thin hydraulic cylinder 24 respectively push the piston to reciprocate within the cylinder, so that the pressure head 27 is pressed against the side of the workpiece 3. Through the magnetic induction sensors inside the right induction radial lateral mounting thin hydraulic cylinder 23 and the left induction radial lateral mounting thin hydraulic cylinder 24, position sensing and control are achieved while bearing lateral force, ultimately realizing accurate detection and control of the piston position. The right induction radial lateral mounting thin hydraulic cylinder 23 and the left induction radial lateral mounting thin hydraulic cylinder 24 can withstand large lateral forces and are suitable for complex working conditions.

Claims

1. A hold down fixture for machining long beam structural members, comprising: The system includes a gantry machining center platform and fixtures. Several fixtures are arranged in a straight line on the gantry machining center platform, forming multiple rows, each row constituting one workstation, thus creating multiple workstations. Each fixture includes a base, the bottom of which is attached to the top of the gantry machining center platform. A T-shaped positioning block is welded to the bottom of the base. The gantry machining center platform has T-slots, and the T-shaped positioning block and the T-slot are fitted together. From left to right along the length of the upper center of the base, a rotary hydraulic cylinder, a right-side-mounted induction radial-lateral-mounted thin hydraulic cylinder, a left-side-mounted induction radial-lateral-mounted thin hydraulic cylinder, and an electro-hydraulic station are connected sequentially. The pistons of the thin-type hydraulic cylinder and the left induction radially laterally mounted thin-type hydraulic cylinder extend in opposite directions and are perpendicular to the length direction of the base. The pistons of the right induction radially laterally mounted thin-type hydraulic cylinder and the left induction radially laterally mounted thin-type hydraulic cylinder are all connected to pressure heads. The rotary cylinder, the right induction radially laterally mounted thin-type hydraulic cylinder, and the left induction radially laterally mounted thin-type hydraulic cylinder are all connected to an electric hydraulic station, which is connected to a power source. The piston of the rotary cylinder faces upward, and a pressure rod is connected above the piston. The two ends of the pressure rod are connected to the base through screws. Stops are vertically connected to both sides of the base.

2. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, The fixtures of adjacent workstations are symmetrically distributed.

3. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, Conduit pipes are installed on the gantry machining center platform.

4. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, The base includes a fixed plate and a bottom plate. The bottom plate is welded to the upper middle part of the fixed plate and is integrally formed. The bottom of the fixed plate is attached to the gantry machining center platform, and the two ends of the pressure rod are connected to the bottom plate by screws.

5. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, Magnetic induction sensors are installed inside the rotary cylinder, the right-sensor type radially laterally mounted thin cylinder, and the left-sensor type radially laterally mounted thin cylinder.

6. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, The right-sensor type radially laterally mounted thin hydraulic cylinder and the left-sensor type radially laterally mounted thin hydraulic cylinder are connected to the base by bolts.

7. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, There are two workstations.

8. A hold down fixture for machining long beam structural members as defined in claim 1 wherein, The stop block is replaceable, and its shape can be changed according to the shape of the long beam workpiece.

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