Angle steel multi-bolt hole site positioning device

Abstract

The invention discloses an angle steel multi-bolt-hole-site positioning device, and belongs to the technical field of angle steel machining. The angle steel clamping assembly is adjustably arranged on the base platform and used for fixing angle steel of different specifications. The multi-axis positioning module comprises a hole distance adjusting mechanism and a control system, and the hole distance adjusting mechanism can automatically generate space coordinates of a plurality of bolt hole groups according to parameters input by the control system; the drill bit guiding assembly is arranged on the base platform and is in linkage with the multi-axis positioning module. Through the synergistic effect of the base platform, the angle steel clamping assembly, the multi-axis positioning module and the drill bit guiding assembly, automatic positioning and machining of multiple bolt hole sites of angle steel are achieved, and the hole site precision and the machining efficiency are remarkably improved; the adjustable angle steel clamping assembly can adapt to angle steel of different specifications; the hole position coordinates are automatically generated by inputting parameters through the control system, and errors caused by manual lineation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of angle steel processing, and particularly to a positioning device for multiple bolt holes on angle steel. Background Art

[0002] Angle steel needs to be fixed to other components through bolt connections. Traditional processing of bolt holes on angle steel mainly relies on manual scribing positioning or simple fixture-assisted drilling, which is prone to the following problems: (1) low positioning accuracy. When processing multiple bolt hole groups (such as arranged in rows or staggered), cumulative errors will cause hole position deviation, affecting the assembly quality and even posing potential risks to the structural strength; (2) poor adaptability. Existing fixed fixtures often only fit a single specification of angle steel or a specific hole pitch. When facing different sizes of angle steel or variable hole pitch requirements, tooling needs to be replaced, lacking flexibility; (3) difficult to ensure the perpendicularity of the formed holes. The asymmetric cross-section of angle steel causes the drill bit to be prone to deflection during drilling. Traditional methods lack effective guidance for the drill bit, resulting in the inclination of the bolt hole axis and affecting the fitting degree of the connecting parts.

[0003] Therefore, there is an urgent need for a positioning device for multiple bolt holes on angle steel to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning device for multiple bolt holes on angle steel to effectively solve the above existing problems.

[0005] Technical Solution: A positioning device for multiple bolt holes on angle steel includes a base platform for placing angle steel;

[0006] An angle steel clamping assembly, adjustably arranged on the base platform, for fixing angle steel of different specifications;

[0007] A multi-axis positioning module, including a hole pitch adjustment mechanism and a control system. The hole pitch adjustment mechanism can automatically generate the spatial coordinates of multiple bolt hole groups according to the input parameters of the control system;

[0008] A drill bit guiding assembly, arranged on the base platform and linked with the multi-axis positioning module.

[0009] In a further embodiment, the base platform includes a frame and a conveying mechanism, wherein:

[0010] The conveying mechanism is arranged on the frame and includes a motor, a conveyor belt, and a driving wheel. The motor drives the conveyor belt to achieve transmission through the driving wheel, for moving the angle steel placed on the conveyor belt;

[0011] One side of the frame is higher than the upper surface of the conveyor belt, and the upper surface of the conveyor belt and the side surface of the frame form a two-way guiding channel perpendicular to the two wing plates of the angle steel.

[0012] Through the above technical solution, the automatic transmission of angle steel is realized, reducing the labor intensity of manual handling and improving the processing continuity; at the same time, the machine frame and the conveyor belt form a two-way guiding channel, ensuring that the angle steel maintains a stable position during transmission and avoiding deviation, laying a foundation for subsequent precise positioning.

[0013] In a further embodiment, the angle steel clamping mechanism includes a first clamping block and a second clamping block. Among them, the first clamping block is in contact with the front end of the angle steel during transmission, and the second clamping block is in contact with and fits against the side surface of the angle steel.

[0014] Through the above technical solution, the two-way fixation of the angle steel is realized, effectively preventing displacement or vibration during the processing.

[0015] In a further embodiment, anti-slip patterns are provided on the surfaces of the first clamping block and the second clamping block that are in contact with the angle steel.

[0016] Through the above technical solution, the friction between the clamping block and the angle steel is enhanced, further improving the clamping stability, especially suitable for scenarios such as high-speed drilling or high-torque processing.

[0017] In a further embodiment, the hole pitch adjustment mechanism includes a first linear guide rail, a second linear guide rail, and a rotating platform. Among them, the first linear guide rail is slidably connected to the first clamping block, the second linear guide rail is slidably connected to the second clamping block, and the rotating platform is installed below the second linear guide rail for driving the second linear guide rail to rotate.

[0018] Through the above technical solution, the flexible adjustment of the clamping position is realized to adapt to the fixing requirements of angle steels of different sizes; at the same time, the rotating platform drives the second linear guide rail to rotate, which can adjust the clamping angle to meet the special positioning requirements of the asymmetric cross-section of the angle steel.

[0019] In a further embodiment, two cylinders are further included, and the output ends of the two cylinders are respectively connected to the first clamping block and the second clamping block through connectors.

[0020] Through the above technical solution, rapid clamping and loosening are realized, improving the clamping efficiency, and at the same time ensuring the uniformity and reliability of the clamping force.

[0021] In a further embodiment, both the first linear guide rail and the second linear guide rail adopt ball screws, and the ball screws are equipped with absolute encoders; an angle sensor is integrated on the rotating platform.

[0022] Through the above technical solution, high-precision displacement control of the linear guide rail is ensured, reducing the error caused by mechanical clearance; the rotating platform is integrated with an angle sensor, which can monitor and feedback the rotation angle in real time, improving the accuracy of hole position angle positioning.

[0023] In a further embodiment, the drill bit guiding assembly includes a Z-axis moving frame disposed on the frame, a cross-shaped guiding sleeve, a pressure foot, and a laser locator fixed on the Z-axis moving frame. The cross-shaped guiding sleeve is embedded with a bushing, and the inner diameter of the bushing is in interference fit with the drill bit.

[0024] Through the above technical solution, the perpendicularity of the hole formation is ensured, the laser locator assists in rapid alignment, the manual adjustment time is reduced, and the processing efficiency is improved.

[0025] In a further embodiment, the pressure foot adopts a pneumatic buffer structure, including a pressure sensor and a buzzer alarm, which automatically gives an audible and visual prompt when the downward pressure reaches the set threshold.

[0026] Through the above technical solution, the drilling pressure can be dynamically monitored to avoid deformation of the angle steel or damage to the drill bit caused by excessive pressure. At the same time, the buzzer alarm provides an audible and visual prompt, facilitating timely intervention by the operator and ensuring processing safety.

[0027] In a further embodiment, the control system includes a PLC controller and a parameter storage module, where:

[0028] The parameter storage module is used to pre-store a standard angle steel specification database;

[0029] The PLC controller communicates with the hole pitch adjustment mechanism through the Modbus-RTU protocol, and is used to realize batch import and dynamic compensation of hole position coordinates. The compensation algorithm is:

[0030] Δ = α × L + β × T

[0031] Where Δ is the compensation amount, α is the length coefficient, L is the length of the angle steel, β is the thickness coefficient, and T is the thickness of the angle steel.

[0032] Through the above technical solution, the cumulative accuracy of multi-hole group processing is further improved, and the real-time coordination between the control system and the actuator is ensured.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) Through the coordinated action of the base platform, the angle steel clamping assembly, the multi-axis positioning module, and the drill bit guiding assembly, the automatic positioning and processing of multiple bolt holes on the angle steel are realized, significantly improving the hole position accuracy and processing efficiency;

[0035] (2) Through the adjustable angle steel clamping assembly, it can adapt to different specifications of angle steel, enhancing the versatility of the device;

[0036] (3) The multi-axis positioning module automatically generates hole position coordinates by inputting parameters into the control system, avoiding the errors of manual scribing, and is especially suitable for the complex arrangement requirements of multiple bolt hole groups.

[0037] (4) By linking the drill bit guiding component with the multi-axis positioning module, the accuracy of the drilling position is ensured, and at the same time, the perpendicularity of the formed hole is improved. Description of the Drawings

[0038] Figure 1 It is a top view of the overall structure of the present invention.

[0039] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0040] Reference Numerals: 1, base platform; 11, frame; 12, conveying mechanism; 121, motor; 122, conveyor belt; 2, angle steel clamping component; 21, first clamping block; 22, second clamping block; 3, multi-axis positioning module; 31, first linear guide rail; 32, second linear guide rail; 33, cylinder; 34, connecting piece; 35, rotating platform; 4, drill bit guiding component; 41, Z-axis moving frame; 42, pressure foot; 43, cross-shaped guide sleeve. Detailed Embodiment

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] As Figures 1 to 2 shown, the present application provides an angle steel multi-bolt hole position positioning device, hereinafter referred to as "the device". The device includes a base platform 1, an angle steel clamping component 2, a multi-axis positioning module 3, and a drill bit guiding component 4.

[0043] The base platform 1 includes a frame 11 and a conveying mechanism 12, which provides basic support for the entire device. Among them, the frame 11 is welded by high-strength steel to ensure overall rigidity and prevent vibration during the processing from affecting the accuracy; the conveying mechanism 12 consists of a motor 121, a conveyor belt 122, and transmission wheels. The motor 121 drives the conveyor belt 122 to move through the transmission wheels, so that the angle steel is automatically transported along a predetermined direction; one side of the frame 11 is higher than the upper surface of the conveyor belt 122, forming a two-way guiding channel to ensure that the angle steel remains stable during transportation and avoid deviation.

[0044] Specific operators place the angle steel on the conveyor belt 122, start the motor 121, and the conveyor belt 122 drives the angle steel to move to the processing position, reducing manual handling and improving processing continuity. At the same time, the guiding structure on the side of the frame 11 ensures that the angle steel moves in a straight line, avoiding skew, ensuring accurate positioning of the angle steel, and providing a reference for subsequent drilling.

[0045] The angle steel clamping assembly 2 is adjustably arranged on the base platform 1 and is used to fix angle steels of different specifications to prevent displacement during drilling. It consists of a first clamping block 21, a second clamping block 22, a cylinder 33, and a linear guide rail. Among them, the first clamping block 21 contacts the front end of the angle steel during transmission to limit longitudinal displacement; the second clamping block 22 fits against the side of the angle steel to limit lateral displacement; the contact surface of the clamping block is provided with anti-slip patterns to increase friction and prevent slipping; the cylinder 33 drives the clamping block to achieve rapid clamping and loosening, improving the clamping efficiency; the first linear guide rail 31 and the second linear guide rail 32 are respectively slidably connected to the first clamping block 21 and the second clamping block 22, making the clamping position adjustable to adapt to angle steels of different sizes.

[0046] Specifically, after the angle steel is transmitted in place, the control system sends a signal, and the cylinder 33 pushes the clamping blocks to clamp the angle steel bidirectionally, improving clamping stability and preventing the angle steel from shaking during drilling; the linear guide rail adjusts the position of the clamping block to ensure that angle steels of different specifications can be stably fixed.

[0047] The multi-axis positioning module 3 is used to automatically calculate and adjust the bolt hole positions to ensure hole pitch accuracy, and includes a hole pitch adjustment mechanism and a control system. Among them, the hole pitch adjustment mechanism includes a first linear guide rail 31, a second linear guide rail 32, and a rotary platform 35. The rotary platform 35 is installed below the second linear guide rail 32 and is used to drive the second linear guide rail 32 to rotate. The rotation angle adjustment range is 0 - 180°, and the positioning accuracy is ±0.1°. It can adjust the clamping angle to adapt to the processing of inclined holes or staggered holes. Further, an angle sensor is integrated on the rotary platform 35 to monitor the rotation angle in real time to ensure accurate positioning; both the first linear guide rail 31 and the second linear guide rail 32 use ball screws, and the ball screws are equipped with absolute encoders. The maximum stroke is 1500mm, and the repeat positioning accuracy is ±0.02mm, ensuring high-precision displacement control of the linear guide rail and reducing errors caused by mechanical clearances.

[0048] The control system includes a PLC controller and a parameter storage module. The parameter storage module is used to pre-store a standard angle steel specification database (such as L50×5, L75×6, etc.) for quick call; the PLC controller is responsible for overall coordination and communicates with the actuators through the Modbus-RTU protocol, and is used to achieve batch import and dynamic compensation of hole position coordinates. The compensation algorithm is: Δ = α×L + β×T;

[0049] Where Δ is the compensation amount, α is the length coefficient, L is the length of the angle steel, β is the thickness coefficient, and T is the thickness of the angle steel. It can automatically correct the hole position deviation and improve the cumulative accuracy.

[0050] Specifically, the operator inputs the angle steel specifications (such as L50×5) and hole position parameters (such as hole pitch 50mm) on the control panel. The PLC calls the pre-stored data, calculates the hole position coordinates, avoids the error of manual scribing, and sends commands to the linear guide and the rotary platform 35. The absolute encoder real-time feedbacks the position to ensure the positioning accuracy.

[0051] The drill bit guiding assembly 4 is arranged on the base platform 1 and is linked with the multi-axis positioning module 3, which is used to ensure the perpendicularity of drilling and prevent the drill bit from deflecting. It includes a Z-axis moving frame 41, a cross-shaped guide sleeve 43, a pressure foot 42 and a laser locator. The Z-axis moving frame 41 is fixed on the frame 11 and is used to realize the vertical feed of the drill bit to ensure that the drilling direction is perpendicular to the surface of the angle steel. The cross-shaped guide sleeve 43 is installed on the Z-axis moving frame 41 and is embedded with a bushing. The inner diameter of the bushing is in interference fit with the drill bit, which can reduce the swing of the drill bit. The laser locator is installed on the Z-axis moving frame 41 and is used to project a light spot before drilling to assist the operator in quickly aligning the position. The pressure foot 42 is installed on the Z-axis moving frame 41 and adopts a pneumatic buffer structure, integrating a pressure sensor and a buzzer alarm. When the downward pressure reaches the set threshold, it automatically gives an audible and visual prompt, which is convenient for the operator to intervene in time to prevent the angle steel from deforming due to excessive pressure.

[0052] Specifically, the laser locator projects a light spot, the operator finely adjusts the position of the angle steel, the Z-axis moving frame 41 descends, the pressure foot 42 contacts the surface of the angle steel and applies a stable pressure, and the drill bit enters the angle steel through the guide sleeve to ensure perpendicular drilling. The pressure sensor monitors the downward pressure at any time, and when it exceeds the limit, the buzzer alarm sounds.

[0053] This application takes the bolt hole processing of L75×6 angle steel (length 2000mm) as an example:

[0054] The first step is to load the angle steel. The operator places the angle steel on the conveyor belt 122, and the conveyor belt 122 automatically sends it to the processing position.

[0055] The second step is automatic clamping. The rotary platform 35 adjusts the clamping angle, and the first cylinder 33 and the second cylinder 33 drive the clamping blocks to fix the angle steel, and the anti-slip lines ensure no sliding.

[0056] The third step is hole position calculation. The PLC calls the parameters of L75×6 and calculates the hole position coordinates (such as hole pitch 80mm, a total of 20 holes).

[0057] The fourth step is dynamic compensation. The compensation algorithm adjusts the hole position according to the length (L = 2000mm) and thickness (T = 6mm) of the angle steel to reduce the cumulative error.

[0058] Step 5: Laser alignment. The laser locator projects a light spot, and the operator confirms that the position is correct.

[0059] Step 6: Automatic drilling. The Z-axis moving frame 41 drives the drill bit to press down, and the guide sleeve ensures vertical drilling. The pressure foot 42 monitors the pressure.

[0060] After a row of holes is completed, the conveyor belt 122 moves the angle steel to the next working station, and the above steps are repeated to continue machining the holes on the other side.

[0061] Compared with the prior art, the present application has the following beneficial effects: the hole pitch error is small, meeting the requirements of high-precision assembly; the perpendicularity of the formed holes is good, ensuring tight bolt connection; and the processing efficiency is significantly improved.

[0062] Based on the above embodiments, the present invention effectively solves the problems of low precision, poor adaptability, and difficult perpendicularity guarantee in traditional angle steel drilling through automatic transmission, high-precision positioning, dynamic compensation, and vertical guidance, and has broad market application prospects.

[0063] The above content is a detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. Angle steel multi-bolt hole position positioning device, characterized by including: Base platform (1), used for placing angle steel; Angle steel clamping assembly (2), adjustably arranged on the base platform (1), used for fixing angle steel of different specifications; Multi-axis positioning module (3), including a hole pitch adjustment mechanism and a control system, the hole pitch adjustment mechanism can automatically generate the spatial coordinates of multiple bolt hole groups according to the input parameters of the control system; Drill bit guiding assembly (4), arranged on the base platform (1) and linked with the multi-axis positioning module (3).

2. The angle steel multi-bolt hole position positioning device according to claim 1, characterized in that The base platform (1) includes a frame (11) and a conveying mechanism (12), where: The conveying mechanism (12) is arranged on the frame (11), including a motor (121), a conveyor belt (122) and transmission wheels, the motor (121) enables the conveyor belt (122) to achieve transmission through the transmission wheels, and is used to move the angle steel placed on the conveyor belt (122); One side of the frame (11) is higher than the upper surface of the conveyor belt (122), and the upper surface of the conveyor belt (122) and the side surface of the frame (11) form a two-way guiding channel perpendicular to the two wing plates of the angle steel.

3. The angle steel multi-bolt hole position positioning device according to claim 2, characterized in that The angle steel clamping mechanism includes a first clamping block (21) and a second clamping block (22), where the first clamping block (21) contacts the front end of the angle steel during transmission, and the second clamping block (22) contacts and fits with the side surface of the angle steel.

4. The angle steel multi-bolt hole position positioning device according to claim 3, characterized in that, Anti-slip patterns are provided on the surfaces of the first clamping block (21) and the second clamping block (22) that contact the angle steel.

5. The angle steel multi-bolt hole position positioning device according to claim 3, characterized in that, The hole pitch adjustment mechanism includes a first linear guide rail (31), a second linear guide rail (32) and a rotary platform (35), where the first linear guide rail (31) is slidably connected to the first clamping block (21), the second linear guide rail (32) is slidably connected to the second clamping block (22), and the rotary platform (35) is installed below the second linear guide rail (32) and is used to drive the second linear guide rail (32) to rotate.

6. The angle steel multi-bolt hole position positioning device according to claim 5, characterized in that, It also includes two cylinders (33), and the output ends of the two cylinders (33) are respectively connected to the first clamping block (21) and the second clamping block (22) through connecting pieces (34).

7. The angle steel multi-bolt hole position positioning device according to claim 5, characterized in that, Both the first linear guide rail (31) and the second linear guide rail (32) adopt ball screws, and the ball screws are equipped with absolute value encoders; an angle sensor is integrated on the rotary platform (35).

8. The angle steel multi-bolt hole position positioning device according to claim 2, characterized in that, The drill bit guiding assembly (4) includes a Z-axis moving frame (41) arranged on the frame (11), a cross-shaped guiding sleeve (43), a pressure foot (42) and a laser locator fixed on the Z-axis moving frame (41), a bushing is embedded in the cross-shaped guiding sleeve (43), and the inner diameter of the bushing is in interference fit with the drill bit.

9. The angle steel multi-bolt hole position positioning device according to claim 8, characterized in that, The pressure foot (42) adopts a pneumatic buffer structure, including a pressure sensor and a buzzer alarm, and automatically gives an audible and visual prompt when the downward pressure reaches the set threshold.

10. The angle steel multi-bolt hole position positioning device according to claim 1, characterized in that, The control system includes a PLC controller and a parameter storage module, where: The parameter storage module is used to pre-store a standard angle steel specification database; The PLC controller communicates with the hole pitch adjusting mechanism through the Modbus-RTU protocol, which is used to realize the batch import and dynamic compensation of hole position coordinates. The compensation algorithm is as follows: Δ=α×L+β×T Where Δ is the compensation amount, α is the length coefficient, L is the length of the angle steel, β is the thickness coefficient, and T is the thickness of the angle steel.

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