Self-adaptive limiting frame for hydraulic corner cutting of iron tower component

Abstract

An iron tower component hydraulic corner cutting self-adaptive limiting frame comprises a pressing die and a positioning die, the limiting frame is arranged on the positioning die, the limiting frame comprises an abutting block, an opening of the positioning die is in a U shape, an L-shaped notch is formed between the abutting block and the positioning die, and angle steel can be inserted into the L-shaped notch. The abutting block abuts against the angle steel after the angle steel enters the positioning die, and the abutting block retreats to the other end face after the angle steel is sheared by the pressing die. The angle steel shearing device has the advantages that geometric constraint is formed through matching of the U-shaped opening and the L-shaped notch, the three-dimensional positioning accuracy of angle steel in the shearing process is guaranteed, and position deviation can be reduced compared with a traditional manual positioning mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to a positioning frame applied to a pressing die, in particular to a tower component hydraulic angle cutting self -adaptation limiting frame. BACKGROUND

[0002] As a commonly used connecting component in buildings, power towers and mechanical equipment, the end of the angle steel often needs to form an inclined surface through an angle cutting process to realize precise assembly. In the prior art, the angle steel angle cutting die is usually composed of upper and lower die seats, positioning baffle and cutting knife edge, and when used, the angle steel is placed in the lower die positioning groove, and the upper die is driven by hydraulic pressure to complete the punching and cutting. This process is widely used in batch production, and the consistency of the angle cutting angle is ensured through the die guide structure, and high efficiency cutting is realized by using the rigid knife edge. After the traditional pressing die is installed on the fixed machine table, the angle steel feeding length needs to be adjusted in cooperation with the limiting device, and single punching can complete single or double side angle cutting processing, and the structure design focuses on ensuring the stability of single batch angle steel specification processing.

[0003] However, the existing pressing die has significant limitations: first, the die knife edge size strictly matches the angle steel edge width and thickness, and when the angle steel specification changes, the entire die set must be disassembled and replaced, resulting in long production line switching time of several hours; second, the storage and management of multi-specification dies occupy a large amount of space, increasing the enterprise equipment cost; third, the new die needs to be repeatedly debugged and positioned after installation, which is easy to produce cumulative error and cause angle cutting position deviation or burr exceeding standard. These problems seriously restrict the flexibility and economy of mixed line production of multi-specification angle steel products. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a tower component hydraulic angle cutting self-adaptive limiting frame which can adapt to batch conversion without replacing the die.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows: a tower component hydraulic angle cutting self-adaptive limiting frame, comprising a pressing die and a positioning die, the limiting frame is arranged on the positioning die, the limiting frame comprises an abutting block, the opening of the positioning die is U-shaped, an L-shaped gap is formed between the abutting block and the positioning die for inserting the angle steel, the abutting block abuts on the angle steel after the angle steel enters the positioning die, and the abutting block retreats to the other end surface after the angle steel is cut by the pressing die.

[0006] The utility model discloses beneficial effect is: through the cooperation of U shape opening and L shape gap forms geometric restraint, ensure the three -dimensional positioning accuracy of angle steel in shearing process, compared with traditional manual positioning mode can reduce position deviation. The dynamic abutting mechanism of abutting block adopts the mechanical self -adaptation mode to compensate the size tolerance of different thickness angle steel. As a preferred mode, the abutting block working surface is equipped with the cross grid anti -skid line that matches with the angle steel surface texture, and the guiding groove with ball bearing is set up in the abutting block bottom, can guarantee that the friction coefficient is not too big when abutting, can guarantee the straightness error of back -off action. The structure still eliminates the radial deviation risk of traditional V type positioning block through the right angle positioning reference plane of L shape gap, especially suitable for asymmetric angle cutting process.

[0007] Further, the limiting frame further comprises a telescopic column, an oil injection column and an oil pump connected with the oil injection column, the telescopic column is connected with the abutting block and is used for controlling the telescopic movement of the abutting block, a sealed space for oil flow is formed between the telescopic column and the oil injection column, and the oil pump is used for injecting or pumping oil into the sealed space to control the extension or retraction of the telescopic column.

[0008] The displacement of the abutting block is accurately controlled through the hydraulic closed-loop control system. The stepped cavity design of the sealed space makes the hydraulic oil form a laminar flow state when the plunger moves, effectively reducing pressure fluctuations. As a preferred mode, the oil injection column is integrated with a flow regulating valve with a tapered valve core, which automatically opens a bypass pressure relief when the oil pressure exceeds a set threshold, and cooperates with the hard chromium plating treatment on the surface of the telescopic column to reduce the friction coefficient of the plunger movement. The hydraulic drive scheme has a smoother contact force curve compared with the traditional cylinder, avoiding rigid impact that causes surface indentation of the angle steel.

[0009] Further, the limiting frame further comprises a control system, a limiting buckle, a torsional spring for providing torsional force for the limiting buckle, an electromagnet for positioning the limiting buckle on the telescopic column and a position sensor arranged on a positioning die, the bottom of the positioning die is provided with a detection hole for placing the position sensor, the detection hole is located in the middle of the positioning die, and the limiting buckle is used for preventing the telescopic rod from extending before the angle steel reaches the detection hole. The position sensor detects the angle steel, and the control system controls the electromagnet to be turned off to release the positioning of the telescopic column by the limiting buckle under the driving of the torsional spring.

[0010] The structure realizes accurate timing control of pressure preloading and action triggering. As a preferred mode, the limiting buckle adopts a double-V-shaped clamping jaw structure, the clamping jaw working surface forms a wedge angle cooperation with the surface of the telescopic column, and the stable holding force can be generated when the electromagnet is energized. The capacitive proximity switch embedded in the detection hole is provided with two detection thresholds, the first detection threshold starts the oil pump pre-pressurization after detecting the angle steel entering signal, and the second detection threshold triggers the electromagnet to release the limiting buckle.

[0011] Furthermore, the limiting frame also includes an abutment platform disposed on the lower side of the abutment block, the abutment platform being used to shorten the distance by which the abutment block is suspended above the positioning mold.

[0012] The support structure of the abutment platform shortens the cantilever length of the abutment block. As a preferred design, the abutment platform adopts a combined dovetail guide rail structure, with PTFE wear-resistant sheets embedded in the guide rail contact surface. Combined with pre-tension springs on both sides, this ensures smooth sliding while controlling guide rail clearance. A triangular reinforcing rib array is set on the bottom surface of the abutment platform to improve overall bending stiffness.

[0013] Furthermore, the limiting frame also includes a lifting platform and a lifting motor for controlling the lifting of the lifting platform, and the abutment is disposed on the lifting platform.

[0014] The L-shaped notch size is continuously adjustable via a lifting mechanism, allowing the adjustment range to cover a wider range of angle steel sides. As a preferred method, the lifting motor uses a closed-loop stepper motor, driven by a planetary reducer to drive the ball screw, and employs a linear encoder for feedback, forming a high-precision closed-loop control. The lifting motor control program can preset eight sets of commonly used angle steel specifications, supporting one-click recall and fine-tuning modes. Attached Figure Description

[0015] Figure 1 This is a top view of the positioning mold and limiting frame according to an embodiment of the present utility model;

[0016] Figure 2 This is a front view of the positioning mold and the limiting frame according to an embodiment of the present utility model;

[0017] Figure 3 This is a partial sectional view of the telescopic column and the oil injection column in an embodiment of this utility model;

[0018] Figure 4 This is a partial cross-sectional view of the limiting buckle in an embodiment of the present utility model;

[0019] Figure 5 This is a top view of the molding die according to an embodiment of the present invention. Detailed Implementation

[0020] This utility model embodiment provides a hydraulic angle-adaptive limiting frame for iron tower components, such as... Figures 1-5 As shown: The system includes a positioning mold 1 and a pressing mold 2. The positioning mold 1 has a U-shaped opening 11 at its top for guiding angle steel. A detection hole 12 is provided in the middle of the positioning mold 1, and a position sensor 37 is embedded in the detection hole 12. A limit frame 3 is installed on the side of the positioning mold 1. The limit frame 3 includes a horizontally movable abutment block 31, which forms an L-shaped notch 32 with the inner wall of the positioning mold 1. An abutment platform 33 is connected to the bottom of the abutment block 31, and a lifting platform 34 is provided below the abutment platform 33. The lifting platform 34 is connected to a lifting motor 36 via a lead screw 35.

[0021] The rear end of the abutment block 31 is connected to the telescopic column 41, and the telescopic column 41 is wrapped with the oil injection column 42 to form a sealed space 43. The oil pump (not shown in the figure) is connected to the oil injection column 42 through an oil pipe. The oil pump (not shown in the figure) rotates in both directions to inject and pump oil into the sealed space 43. The surface of the telescopic column 41 is provided with a positioning groove 45. The limit buckle 51 is hinged to the side wall of the positioning mold 1 by a torsion spring 52. The electromagnet 53 is fixed on the opposite side of the limit buckle 51. A permanent magnet 13 that works with the electromagnet 53 is provided in the positioning mold 1. When the limit buckle 51 is engaged in the positioning groove 45, the oil pump (not shown in the figure) can build up oil pressure in advance but restrict the movement of the telescopic column 41.

[0022] The working principle of this embodiment is as follows: When the operator sends the angle steel into the U-shaped opening 11 of the positioning mold 1, before the position sensor 37 detects that the angle steel has reached the detection hole 12, the oil pump (not shown in the figure) continuously injects hydraulic oil to enhance the oil pressure in the sealed space 43. When the position sensor 37 detects that the angle steel has reached the detection hole 12, the control system (not shown in the figure) cuts off the power to the electromagnet 53, and the limit buckle 51 disengages from the telescopic column 41 under the action of the torsion spring 52. At the same time, the telescopic column 41, under the action of the oil pressure in the sealed space 43, drives the abutment block 31 to rush out quickly first, and then slowly presses against the angle steel under the action of the oil pump (not shown in the figure) injecting oil at a uniform speed. At this time, the L-shaped notch 32 forms a precise position. After the pressing mold 2 completes the shearing, the oil pump (not shown in the figure) reverses to pump oil to reset the abutment block 31, and the limit buckle 51 is re-attracted by the electromagnet 53 and locked on the telescopic column 41 after the telescopic column 41 is reset. The lifting motor 36 adjusts the height of the lifting platform 34 via the lead screw 35, and changes the size of the L-shaped notch 32 to accommodate angle steel of different specifications.

[0023] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A hydraulic angle cutting self-adaptive limiting frame for tower component, comprising a pressing die and a positioning die, the limiting frame is arranged on the positioning die, characterized in that: The limiting frame comprises an abutting block, the opening of the positioning die is U-shaped, an L-shaped gap for inserting the angle steel is formed between the abutting block and the positioning die, the abutting block abuts against the angle steel after the angle steel enters the positioning die, and the abutting block retreats to the other end surface after the angle steel is cut by the die.

2. The hydraulic corner cutting self-adaptive limiting frame for tower component according to claim 1, characterized in that: The limiting frame further comprises a telescopic column, an oil injection column and an oil pump connected with the oil injection column, the telescopic column is connected with the abutting block and is used for controlling the telescopic movement of the abutting block, a sealed space for flow entering is formed between the telescopic column and the oil injection column, and the oil pump is used for injecting or pumping oil into the sealed space to control the extension or retraction of the telescopic column.

3. The hydraulic corner cutting self-adaptive stopper for tower component according to claim 2, characterized in that: The limiting frame further comprises a control system, a limiting buckle, a torsional spring for providing torsional force to the limiting buckle, an electromagnet for positioning the limiting buckle on the telescopic column and a position sensor arranged on the positioning die, the bottom of the positioning die is provided with a detection hole for placing the position sensor, the detection hole is located in the middle of the positioning die, the limiting buckle is used for preventing the telescopic column from extending before the angle steel reaches the detection hole, and the position sensor controls the control system to turn off the electromagnet to release the positioning of the limiting buckle on the telescopic column under the driving of the torsional spring after detecting the angle steel.

4. The hydraulic corner cutting self-adaptive stopper for tower component according to claim 1, characterized in that: The limiting frame further comprises an abutting table arranged on the lower side of the abutting block, and the abutting table is used for shortening the distance of the abutting block suspended on the positioning die.

5. The hydraulic corner cutting self-adaptive stopper for tower component according to claim 4, characterized in that: The limiting frame further comprises a lifting table and a lifting motor for controlling the lifting of the lifting table, and the abutting table is arranged on the lifting table.

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