CN111660102A - Double-spindle movable gantry ultra-long stroke machining center for drilling and milling steel rail joint - Google Patents

Abstract

The invention provides a double-spindle moving gantry super-long stroke machining center used for drilling and milling of steel rail joints. A gantry frame is arranged on the bed. The side slide seat and the auxiliary machining side spindle box are arranged on the other side of the bed, the fan-shaped servo tool magazine is arranged between the main machining side spindle box and the auxiliary machining side spindle box, and the operating table is arranged on both sides of the bed; a single bed The length is 6m, and the structure of the splicing bed is adopted. The length of the single machine bed is 30m, and the longest can be extended to 54m. The advantages of the present invention: fill the blank of special rail processing equipment, can process a 27m long rail in a single time, and can extend the longest to 54m, and the operation difficulty of the equipment is reduced. The problem of large parallelism error between two linear guide rails with long strokes in the traditional structure and low repeat positioning accuracy caused by the traditional structure is solved, and the processing efficiency is improved.

Description

Double-spindle moving gantry super-long stroke machining center for drilling and milling of rail joints

technical field

The invention relates to the field of layout and structure of a double-sided hanging box opposed double-spindle moving gantry super-long stroke machining center used for drilling and milling of a rail joint, in particular to a double-spindle moving gantry ultra-long travel used for drilling and milling of a rail joint. Stroke machining center.

Background technique

The rails used in high-speed railways and intercity rails are all segmented, and secondary assembly is carried out on the construction site. Therefore, it is necessary to perform drilling, milling, and chamfering of the rails in advance. The equipment currently used is non-professional processing equipment. Processing efficiency and degree of automation are low.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dual-spindle moving gantry ultra-long stroke machining center used for drilling and milling of rail joints in order to solve the problems of low automation and low efficiency in processing rails with existing numerical control equipment.

The invention provides a double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint, which is characterized in that: the double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint includes a machine bed. 1. Gantry frame 2, main processing side sliding seat 3, main processing side spindle box 4, auxiliary processing side sliding seat 5, auxiliary processing side spindle box 6, fan-shaped servo tool magazine 7, operating table 8;

Among them: the gantry frame 2 is arranged on the bed 1, the main machining side slide 3 and the main machining side spindle box 4 are arranged on one side of the bed 1, the auxiliary machining side sliding seat 5 and the auxiliary machining side spindle box 6 are arranged on the bed On the other side of the machine body 1, the fan-shaped servo tool magazine 7 is arranged between the main machining side spindle box 4 and the auxiliary machining side spindle box 6, and the operating table 8 is arranged on both sides of the bed body 1; the length of a single bed body 1 is 6m, using The structural form of the splicing bed, the length of the bed of a single machine tool is 30m, and the longest extension is 54m. The gantry is driven by one side and adopts a rack and pinion drive structure. The main processing side adopts a linear guide with preload and adopts double reduction The machine anti-backlash structure can meet the positioning accuracy and repeated positioning accuracy of reciprocating motion; the auxiliary guide side, that is, the auxiliary processing side, adopts a rectangular steel guide rail and an eccentric preload roller structure; and the span to support ratio of the gantry is greater than 2; the gantry has two The main machining side spindle box 4 adopts the spindle specification BT50, which is responsible for drilling and milling the rail; the auxiliary machining side spindle box 6 adopts the spindle specification NT40, which is responsible for chamfering the rail; fan-shaped servo cutter The number of tools in library 7 is 8.

The tool magazines on the market now occupy a large area and cannot meet the needs of use. This fan-shaped servo tool magazine avoids the interference between the machining stroke and the tool changing area, and no additional travel is required for tool changing, and the normal processing stroke can meet the tool changing needs. .

The structure of the fan-shaped servo tool magazine 7 includes a BT50 tool 701, a BT50 tool holder 702, a fan-shaped tool disc 703, 8 tool holders are installed above, a reducer 704, which meets the torque and rotational speed required when the tool disc rotates, a base 705, Connect the reducer to the servo motor and fix it on the top of the motor base, the positioning sleeve 706, the servo motor 707 are responsible for the input of the rotary power of the cutter head and the determination of the orientation angle, and the tool magazine bracket 708;

The headstock moves back and forth on the bed, and the rapid traverse speed is 20m/min. The main processing side adopts the linear guide structure with preload, and the auxiliary processing side adopts the steel guide structure, which solves the problem of the parallelism between the two linear guides with long strokes in the traditional structure. The large error brings the problem of low repeat positioning accuracy, and the rapid traverse speed is higher and the movement is smoother; the main processing side line rail slider is positioned in four directions; the secondary processing side steel rail slider is positioned in two directions , and when the workpiece is processed, the slider on the side of the steel guide rail has a locking device to ensure the stability during the processing.

The upper fixed roller 9, the lower roller 10, and the lower roller 10 are eccentric wheels to ensure the matching clearance; the steel guide rail slides, the upper fixed roller 9 and the lower roller 10 are fixed above it, and the precision scraper plate ensures the contact between the rollers There are no impurities such as iron filings on the surface.

The auxiliary processing side is equipped with a 65-gauge linear guideway, and there are 3 sliders fixed above the gantry to ensure the stability during the movement. Since the machining stroke of this axis is 27m, a grating ruler is required to ensure the accuracy of the X axis. To prevent foreign matter such as iron filings from contaminating the scale during processing, a scale guard is provided.

The double-spindle moving gantry super-long stroke machining center used for drilling and milling of rail joints is provided with sliders 11, with three groups in total, to ensure smooth movement of the gantry above the steel guide rails, and clamping blocks 12 to achieve clamping; the processed steel rails 15. After the rail is hoisted onto the workbench, the permanent magnet suction cup 13 absorbs the bottom of the rail, the hydraulic cylinder 17 assists in pressing the top of the rail, and there is a guide post and guide sleeve structure 18 to ensure long-term reliability and positioning in the horizontal direction The stopper 16 and the hydraulic cylinder ensure the clamping efficiency of the rail each time. The magnetic conductive pad 14 above the electric permanent magnet chuck 13 will cause wear and tear to the electromagnetic chuck due to long-term contact, and the overall replacement cost is not high, so there is a Magnetic pads can be replaced separately after long-term wear and tear. The working suction force of the electric permanent magnet chuck is 250N/cm ² .

The special-shaped rail special fixture, due to the special structure of the special-shaped rail, if there is no auxiliary support, it will be unstable during processing. The special fixture in Figures 6 and 7 is specially designed, the fixture mounting seat 19, and the hydraulic cylinder 20. Drive the fixture body 25 to move left and right , the moving angle is 30°. When there is no rail, the fixture body 25 is deflected by 30° counterclockwise. When the rail is hoisted and dropped on the fixture body 25, the hydraulic cylinder 21 moves to drive the T-shaped slider 22 to move forward, and the clamping block 23 Push the rail 24 in place to ensure that the rail and the fixture body 25 are completely fitted. At this time, the fixture body 25 is deflected 30° clockwise to ensure that the processing surface of the rail is parallel to the work surface, and then processing; the clamping block 23 is a plurality of sets of mounting screw holes The structure is convenient to adjust the clamping position when processing different rails.

Hoist the rail to the top of the workbench, rely on special fixtures and positioning blocks to quickly locate and fix the rail.

The electromagnetic chuck is energized, the rail is adsorbed on the top of the magnetic conductive pad, and the auxiliary clamping button is pressed, and the hydraulic cylinder drives the auxiliary clamping block to press the upper surface of the guide rail to ensure the stability of the workpiece during processing.

Begin to process the rail, perform drilling, milling and other processing on the main processing side, and then perform chamfering processing on the secondary processing side; when drilling holes of different specifications on the main processing side, automatic tool change can be performed.

The iron scraps produced by the processing will fall above the inclined surface of the bed, and then fall into the chain row under the bed, and the chain row will rotate to take the iron scraps away and bring them into the iron scrap collection car.

The equipment has an independent online detection function, which can detect the aperture, hole height and hole distance, and the error of the online detection device is ±0.02mm. The detection device compares the measured data with the theoretical data in real time. If the measured data is out of tolerance, there will be an acousto-optic prompt, the out-of-tolerance data will be color-discriminated, and a detection report will be automatically generated.

It has an information management system, which can use the existing local area network to realize the functions of screen display and remote monitoring of the equipment system on the remote side of the office through software. .

Advantages of the present invention:

The dual-spindle moving gantry super-long stroke machining center for drilling and milling of rail joints of the present invention fills the gap of special rail processing equipment, can process 27m long rails in a single time, and can extend up to 54m. Since it is a moving gantry structure, there are spindles on both sides, and it has the conditions for simultaneous processing, so the processing efficiency is much higher than that of single-sided processing, and the difficulty of equipment operation is reduced. Both sides of the bed are equipped with linear guide rails and steel guide rails, which solve the problem of large parallelism error between two linear guide rails with long strokes in the traditional structure and low repeat positioning accuracy; smoother. The electromagnetic chuck is used to adsorb the workpiece to be processed, and there is an auxiliary pressing device, which eliminates the need for traditional fixtures such as pressure plates, and reduces the auxiliary processing time. The self-made fan-shaped servo tool magazine ensures that the processing and tool change do not interfere in a small space. The self-made special-shaped rail fixture greatly reduces the auxiliary time for rail clamping and improves the processing efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:

Figure 1 is a schematic diagram of the structure of the whole machine;

Fig. 2 is a schematic diagram of a fan-shaped servo tool magazine;

Figure 3 is a schematic diagram of the linear guide rail on the main processing side and the steel guide rail on the auxiliary processing side;

Figure 4 is a schematic diagram of the main processing side steel guide rail clamping device;

Figure 5 is a schematic diagram of the rail clamping structure;

Figure 6 is a front view of the special-shaped rail clamp structure;

Figure 7 is a side view of the special-shaped rail clamp structure.

Detailed ways

Example 1

The invention provides a double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint, which is characterized in that: the double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint includes a machine bed. 1. Gantry frame 2, main processing side sliding seat 3, main processing side spindle box 4, auxiliary processing side sliding seat 5, auxiliary processing side spindle box 6, fan-shaped servo tool magazine 7, operating table 8;

Among them: the gantry frame 2 is arranged on the bed 1, the main machining side slide 3 and the main machining side spindle box 4 are arranged on one side of the bed 1, the auxiliary machining side sliding seat 5 and the auxiliary machining side spindle box 6 are arranged on the bed On the other side of the machine body 1, the fan-shaped servo tool magazine 7 is arranged between the main machining side spindle box 4 and the auxiliary machining side spindle box 6, and the operating table 8 is arranged on both sides of the bed body 1; the length of a single bed body 1 is 6m, using The structural form of the splicing bed, the length of the bed of a single machine tool is 30m, and the longest extension is 54m. The gantry is driven by one side and adopts a rack and pinion drive structure. The main processing side adopts a linear guide with preload and adopts double reduction The machine anti-backlash structure can meet the positioning accuracy and repeated positioning accuracy of reciprocating motion; the auxiliary guide side, that is, the auxiliary processing side, adopts a rectangular steel guide rail and an eccentric preload roller structure; and the span to support ratio of the gantry is greater than 2; the gantry has two The main machining side spindle box 4 adopts the spindle specification BT50, which is responsible for drilling and milling the rail; the auxiliary machining side spindle box 6 adopts the spindle specification NT40, which is responsible for chamfering the rail; fan-shaped servo cutter The number of tools in library 7 is 8.

The tool magazines on the market now occupy a large area and cannot meet the needs of use. This fan-shaped servo tool magazine avoids the interference between the machining stroke and the tool changing area, and no additional travel is required for tool changing, and the normal processing stroke can meet the tool changing needs. .

The upper fixed roller 9, the lower roller 10, and the lower roller 10 are eccentric wheels to ensure the matching clearance; the steel guide rail slides, the upper fixed roller 9 and the lower roller 10 are fixed above it, and the precision scraper plate ensures the contact between the rollers There are no impurities such as iron filings on the surface.

The auxiliary processing side is equipped with a 65-gauge linear guideway, and there are 3 sliders fixed above the gantry to ensure the stability during the movement. Since the machining stroke of this axis is 27m, a grating ruler is required to ensure the accuracy of the X axis. To prevent foreign matter such as iron filings from contaminating the scale during processing, a scale guard is provided.

The double-spindle moving gantry super-long stroke machining center used for drilling and milling of rail joints is provided with sliders 11, with three groups in total, to ensure smooth movement of the gantry above the steel guide rails, and clamping blocks 12 to achieve clamping; the processed steel rails 15. After the rail is hoisted onto the workbench, the permanent magnet suction cup 13 absorbs the bottom of the rail, the hydraulic cylinder 17 assists in pressing the top of the rail, and there is a guide post and guide sleeve structure 18 to ensure long-term reliability and positioning in the horizontal direction The stopper 16 and the hydraulic cylinder ensure the clamping efficiency of the rail each time. The magnetic conductive pad 14 above the electric permanent magnet chuck 13 will cause wear and tear to the electromagnetic chuck due to long-term contact, and the overall replacement cost is not high, so there is a Magnetic pads can be replaced separately after long-term wear and tear. The working suction force of the electric permanent magnet chuck is 250N/cm ² .

The special-shaped rail special fixture, due to the special structure of the special-shaped rail, if there is no auxiliary support, it will be unstable during processing. The special fixture in Figures 6 and 7 is specially designed, the fixture mounting seat 19, and the hydraulic cylinder 20. Drive the fixture body 25 to move left and right , the moving angle is 30°. When there is no rail, the fixture body 25 is deflected 30° counterclockwise. When the rail is hoisted and dropped on the fixture body 25, the hydraulic cylinder 21 moves to drive the T-shaped slider 22 to move forward, and the clamping block 23 Push the rail 24 in place to ensure that the rail and the fixture body 25 are completely fitted. At this time, the fixture body 25 is deflected 30° clockwise to ensure that the processing surface of the rail is parallel to the work surface, and then processing; the clamping block 23 is a plurality of sets of mounting screw holes The structure is convenient to adjust the clamping position when processing different rails.

Hoist the rail to the top of the workbench, rely on special fixtures and positioning blocks to quickly locate and fix the rail.

The electromagnetic chuck is energized, the rail is adsorbed on the top of the magnetic conductive pad, and the auxiliary clamping button is pressed, and the hydraulic cylinder drives the auxiliary clamping block to press the upper surface of the guide rail to ensure the stability of the workpiece during processing.

Begin to process the rail, perform drilling, milling and other processing on the main processing side, and then perform chamfering processing on the secondary processing side; when drilling holes of different specifications on the main processing side, automatic tool change can be performed.

The iron scraps produced by the processing will fall above the inclined surface of the bed, and then fall into the chain row under the bed, and the chain row will rotate to take the iron scraps away and bring them into the iron scrap collection car.

The equipment has an independent online detection function, which can detect the aperture, hole height and hole distance, and the error of the online detection device is ±0.02mm. The detection device compares the measured data with the theoretical data in real time. If the measured data is out of tolerance, there will be an acousto-optic prompt, the out-of-tolerance data will be color-discriminated, and a detection report will be automatically generated.

It has an information management system, which can use the existing local area network to realize the functions of screen display and remote monitoring of the equipment system on the remote side of the office through software. .

Example 2

The invention provides a double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint, which is characterized in that: the double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint includes a machine bed. 1. Gantry frame 2, main processing side sliding seat 3, main processing side spindle box 4, auxiliary processing side sliding seat 5, auxiliary processing side spindle box 6, fan-shaped servo tool magazine 7, operating table 8;

Among them: the gantry frame 2 is arranged on the bed 1, the main machining side slide 3 and the main machining side spindle box 4 are arranged on one side of the bed 1, the auxiliary machining side sliding seat 5 and the auxiliary machining side spindle box 6 are arranged on the bed On the other side of the machine body 1, the fan-shaped servo tool magazine 7 is arranged between the main machining side spindle box 4 and the auxiliary machining side spindle box 6, and the operating table 8 is arranged on both sides of the bed body 1; the length of a single bed body 1 is 6m, using The structural form of the splicing bed, the length of the bed of a single machine tool is 30m, and the longest extension is 54m. The gantry is driven by one side and adopts a rack and pinion drive structure. The main processing side adopts a linear guide with preload and adopts double reduction The machine anti-backlash structure can meet the positioning accuracy and repeated positioning accuracy of reciprocating motion; the auxiliary guide side, that is, the auxiliary processing side, adopts a rectangular steel guide rail and an eccentric preload roller structure; and the span to support ratio of the gantry is greater than 2; the gantry has two The main machining side spindle box 4 adopts the spindle specification BT50, which is responsible for drilling and milling the rail; the auxiliary machining side spindle box 6 adopts the spindle specification NT40, which is responsible for chamfering the rail; fan-shaped servo cutter The number of tools in library 7 is 8.

The tool magazines on the market now occupy a large area and cannot meet the needs of use. This fan-shaped servo tool magazine avoids the interference between the machining stroke and the tool changing area, and no additional travel is required for tool changing, and the normal processing stroke can meet the tool changing needs. .

The structure of the fan-shaped servo tool magazine 7 includes a BT50 tool 701, a BT50 tool holder 702, a fan-shaped tool disc 703, 8 tool holders are installed above, a reducer 704, which meets the torque and rotational speed required when the tool disc rotates, a base 705, Connect the reducer to the servo motor and fix it on the top of the motor base, the positioning sleeve 706, the servo motor 707 are responsible for the input of the rotary power of the cutter head and the determination of the orientation angle, and the tool magazine bracket 708;

The headstock moves back and forth on the bed, and the rapid traverse speed is 20m/min. The main processing side adopts the linear guide structure with preload, and the auxiliary processing side adopts the steel guide structure, which solves the problem of the parallelism between the two linear guides with long strokes in the traditional structure. The large error brings the problem of low repeat positioning accuracy, and the rapid traverse speed is higher and the movement is smoother; the main processing side line rail slider is positioned in four directions; the secondary processing side steel rail slider is positioned in two directions , and when the workpiece is processed, the slider on the side of the steel guide rail has a locking device to ensure the stability during the processing.

The double-spindle moving gantry super-long stroke machining center used for drilling and milling of rail joints is provided with sliders 11, with three groups in total, to ensure smooth movement of the gantry above the steel guide rails, and clamping blocks 12 to achieve clamping; the processed steel rails 15. After the rail is hoisted onto the workbench, the permanent magnet suction cup 13 absorbs the bottom of the rail, the hydraulic cylinder 17 assists in pressing the top of the rail, and there is a guide post and guide sleeve structure 18 to ensure long-term reliability and positioning in the horizontal direction The stopper 16 and the hydraulic cylinder ensure the clamping efficiency of the rail each time. The magnetic conductive pad 14 above the electric permanent magnet chuck 13 will cause wear and tear to the electromagnetic chuck due to long-term contact, and the overall replacement cost is not high, so there is a Magnetic pads can be replaced separately after long-term wear and tear. The working suction force of the electric permanent magnet chuck is 250N/cm ² .

The special-shaped rail special fixture, due to the special structure of the special-shaped rail, if there is no auxiliary support, it will be unstable during processing. The special fixture in Figures 6 and 7 is specially designed, the fixture mounting seat 19, and the hydraulic cylinder 20. Drive the fixture body 25 to move left and right , the moving angle is 30°. When there is no rail, the fixture body 25 is deflected by 30° counterclockwise. When the rail is hoisted and dropped on the fixture body 25, the hydraulic cylinder 21 moves to drive the T-shaped slider 22 to move forward, and the clamping block 23 Push the rail 24 in place to ensure that the rail and the fixture body 25 are completely fitted. At this time, the fixture body 25 is deflected 30° clockwise to ensure that the processing surface of the rail is parallel to the work surface, and then processing; the clamping block 23 is a plurality of sets of mounting screw holes The structure is convenient to adjust the clamping position when processing different rails.

Hoist the rail to the top of the workbench, rely on special fixtures and positioning blocks to quickly locate and fix the rail.

The electromagnetic chuck is energized, the rail is adsorbed on the top of the magnetic conductive pad, and the auxiliary clamping button is pressed, and the hydraulic cylinder drives the auxiliary clamping block to press the upper surface of the guide rail to ensure the stability of the workpiece during processing.

Begin to process the rail, perform drilling, milling and other processing on the main processing side, and then perform chamfering processing on the secondary processing side; when drilling holes of different specifications on the main processing side, automatic tool change can be performed.

The iron scraps produced by the processing will fall above the inclined surface of the bed, and then fall into the chain row under the bed, and the chain row will rotate to take the iron scraps away and bring them into the iron scrap collection car.

The equipment has an independent online detection function, which can detect the aperture, hole height and hole distance, and the error of the online detection device is ±0.02mm. The detection device compares the measured data with the theoretical data in real time. If the measured data is out of tolerance, there will be an acousto-optic prompt, the out-of-tolerance data will be color-discriminated, and a detection report will be automatically generated.

It has an information management system, which can use the existing local area network to realize the functions of screen display and remote monitoring of the equipment system on the remote side of the office through software. .

Example 3

The invention provides a double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint, which is characterized in that: the double-spindle moving gantry ultra-long stroke machining center for drilling and milling of a rail joint includes a machine bed. 1. Gantry frame 2, main processing side sliding seat 3, main processing side spindle box 4, auxiliary processing side sliding seat 5, auxiliary processing side spindle box 6, fan-shaped servo tool magazine 7, operating table 8;

Among them: the gantry frame 2 is arranged on the bed 1, the main machining side slide 3 and the main machining side spindle box 4 are arranged on one side of the bed 1, the auxiliary machining side sliding seat 5 and the auxiliary machining side spindle box 6 are arranged on the bed On the other side of the machine body 1, the fan-shaped servo tool magazine 7 is arranged between the main machining side spindle box 4 and the auxiliary machining side spindle box 6, and the operating table 8 is arranged on both sides of the bed body 1; the length of a single bed body 1 is 6m, using The structural form of the splicing bed, the length of the bed of a single machine tool is 30m, and the longest extension is 54m. The gantry is driven by one side and adopts a rack and pinion drive structure. The main processing side adopts a linear guide with preload and adopts double reduction The machine anti-backlash structure can meet the positioning accuracy and repeated positioning accuracy of reciprocating motion; the auxiliary guide side, that is, the auxiliary processing side, adopts a rectangular steel guide rail and an eccentric preload roller structure; and the span to support ratio of the gantry is greater than 2; the gantry has two The main machining side spindle box 4 adopts the spindle specification BT50, which is responsible for drilling and milling the rail; the auxiliary machining side spindle box 6 adopts the spindle specification NT40, which is responsible for chamfering the rail; fan-shaped servo cutter The number of tools in library 7 is 8.

The tool magazines on the market now occupy a large area and cannot meet the needs of use. This fan-shaped servo tool magazine avoids the interference between the machining stroke and the tool changing area, and no additional travel is required for tool changing, and the normal processing stroke can meet the tool changing needs. .

The structure of the fan-shaped servo tool magazine 7 includes a BT50 tool 701, a BT50 tool holder 702, a fan-shaped tool disc 703, 8 tool holders are installed above, a reducer 704, which meets the torque and rotational speed required when the tool disc rotates, a base 705, Connect the reducer to the servo motor and fix it on the top of the motor base, the positioning sleeve 706, the servo motor 707 are responsible for the input of the rotary power of the cutter head and the determination of the orientation angle, and the tool magazine bracket 708;

The headstock moves back and forth on the bed, and the rapid traverse speed is 20m/min. The main processing side adopts the linear guide structure with preload, and the auxiliary processing side adopts the steel guide structure, which solves the problem of the parallelism between the two linear guides with long strokes in the traditional structure. The large error brings the problem of low repeat positioning accuracy, and the rapid traverse speed is higher and the movement is smoother; the main processing side line rail slider is positioned in four directions; the secondary processing side steel rail slider is positioned in two directions , and when the workpiece is processed, the slider on the side of the steel guide rail has a locking device to ensure the stability during the processing.

The upper fixed roller 9, the lower roller 10, and the lower roller 10 are eccentric wheels to ensure the matching clearance; the steel guide rail slides, the upper fixed roller 9 and the lower roller 10 are fixed above it, and the precision scraper plate ensures the contact between the rollers There are no impurities such as iron filings on the surface.

The auxiliary processing side is equipped with a 65-gauge linear guideway, and there are 3 sliders fixed above the gantry to ensure the stability during the movement. Since the machining stroke of this axis is 27m, a grating ruler is required to ensure the accuracy of the X axis. To prevent foreign matter such as iron filings from contaminating the scale during processing, a scale guard is provided.

The double-spindle moving gantry super-long stroke machining center used for drilling and milling of rail joints is provided with sliders 11, with three groups in total, to ensure smooth movement of the gantry above the steel guide rails, and clamping blocks 12 to achieve clamping; the processed steel rails 15. After the rail is hoisted onto the workbench, the permanent magnet suction cup 13 absorbs the bottom of the rail, the hydraulic cylinder 17 assists in pressing the top of the rail, and there is a guide post and guide sleeve structure 18 to ensure long-term reliability and positioning in the horizontal direction The stopper 16 and the hydraulic cylinder ensure the clamping efficiency of the rail each time. The magnetic conductive pad 14 above the electric permanent magnet chuck 13 will cause wear and tear to the electromagnetic chuck due to long-term contact, and the overall replacement cost is not high, so there is a Magnetic pads can be replaced separately after long-term wear and tear. The working suction force of the electric permanent magnet chuck is 250N/cm ² .

The special-shaped rail special fixture, due to the special structure of the special-shaped rail, if there is no auxiliary support, it will be unstable during processing. The special fixture in Figures 6 and 7 is specially designed, the fixture mounting seat 19, and the hydraulic cylinder 20. Drive the fixture body 25 to move left and right , the moving angle is 30°. When there is no rail, the fixture body 25 is deflected by 30° counterclockwise. When the rail is hoisted and dropped on the fixture body 25, the hydraulic cylinder 21 moves to drive the T-shaped slider 22 to move forward, and the clamping block 23 Push the rail 24 in place to ensure that the rail and the fixture body 25 are completely fitted. At this time, the fixture body 25 is deflected 30° clockwise to ensure that the processing surface of the rail is parallel to the work surface, and then processing; the clamping block 23 is a plurality of sets of mounting screw holes The structure is convenient to adjust the clamping position when processing different rails.

Hoist the rail to the top of the workbench, rely on special fixtures and positioning blocks to quickly locate and fix the rail.

The electromagnetic chuck is energized, the rail is adsorbed on the top of the magnetic conductive pad, and the auxiliary clamping button is pressed, and the hydraulic cylinder drives the auxiliary clamping block to press the upper surface of the guide rail to ensure the stability of the workpiece during processing.

Begin to process the rail, perform drilling, milling and other processing on the main processing side, and then perform chamfering processing on the secondary processing side; when drilling holes of different specifications on the main processing side, automatic tool change can be performed.

The iron scraps produced by the processing will fall above the inclined surface of the bed, and then fall into the chain row under the bed, and the chain row will rotate to take the iron scraps away and bring them into the iron scrap collection car.

The equipment has an independent online detection function, which can detect the aperture, hole height and hole distance, and the error of the online detection device is ±0.02mm. The detection device compares the measured data with the theoretical data in real time. If the measured data is out of tolerance, there will be an acousto-optic prompt, the out-of-tolerance data will be color-discriminated, and a detection report will be automatically generated.

It has an information management system, which can use the existing local area network to realize the functions of screen display and remote monitoring of the equipment system on the remote side of the office through software. .

Claims (5)

1. A overlength stroke machining center of dragon door is moved to two main shafts for rail joint portion bores and mills, its characterized in that: the double-spindle movable gantry overlong stroke machining center for drilling and milling the steel rail joint comprises a lathe bed (1), a gantry frame (2), a main machining side sliding seat (3), a main machining side spindle box (4), an auxiliary machining side sliding seat (5), an auxiliary machining side spindle box (6), a fan-shaped servo tool magazine (7) and an operating platform (8);

wherein: the numerical control lathe is characterized in that a gantry frame (2) is arranged on the lathe bed (1), a main processing side sliding seat (3) and a main processing side spindle box (4) are arranged on one side of the lathe bed (1), an auxiliary processing side sliding seat (5) and an auxiliary processing side spindle box (6) are arranged on the other side of the lathe bed (1), a fan-shaped servo tool magazine (7) is arranged between the main processing side spindle box (4) and the auxiliary processing side spindle box (6), and an operating platform (8) is arranged on two sides of the lathe bed (1); the length of a single machine tool body (1) is 6m, the length of the single machine tool body is 30m, the longest length is 54m, the gantry is driven by a single side, a gear and rack transmission structure is adopted, a linear guide rail with pre-tightening is adopted on the main guide processing side, and a double-speed reducer gap eliminating structure is adopted, so that the positioning precision and the repeated positioning precision of reciprocating motion are met; the auxiliary guide side, namely the auxiliary processing side, adopts a rectangular steel guide rail and eccentric pre-tightening roller structure; and the ratio of the span to the support distance of the gantry is more than 2; the gantry comprises two machining main shafts, and a main machining side main shaft box (4) adopts the specification BT50 of the main shafts and is responsible for drilling and milling the steel rail; the auxiliary machining side main shaft box (6) adopts the specification NT40 of a main shaft and is responsible for chamfering the steel rail; the number of the cutters of the fan-shaped servo tool magazine (7) is 8.

2. The ultra-long stroke machining center for the double-spindle movable gantry for drilling and milling of the steel rail joint part, as recited in claim 1, is characterized in that: the fan-shaped servo tool magazine (7) structurally comprises a BT50 tool (701), a BT50 tool holder (702), a fan-shaped cutter head (703), 8 tool holders arranged above the cutter head, a speed reducer (704) meeting the torque and the rotating speed required by the rotation of the cutter head, a base (705) connecting the speed reducer with a servo motor and fixed above a motor base, a positioning sleeve (706), a servo motor (707) responsible for inputting the rotation power of the cutter head and determining the orientation angle, and a tool magazine support (708); the main spindle box moves back and forth on the lathe bed at a fast moving speed of 20m/min, a main processing side adopts a linear guide rail structure with pre-tightening, an auxiliary processing side adopts a steel guide rail structure, and a main processing side rail slide block is positioned in four directions; the auxiliary machining side steel guide rail slide block is positioned in two directions, and the steel guide rail side slide block is provided with a locking device when a workpiece is machined.

3. The ultra-long stroke machining center for the double-spindle movable gantry for drilling and milling of the steel rail joint part, as recited in claim 1, is characterized in that: the upper fixed roller (9), the lower roller (10) and the lower roller (10) are eccentric wheels, so that a fit clearance is ensured; the steel guide rail sliding block fixes the upper fixed roller (9) and the lower roller (10) above the steel guide rail sliding block, and the precise chip scraping plate ensures that the contact surface of the rollers has no impurities such as scrap iron and the like; the auxiliary processing side is provided with a 65-specification linear guide rail, and 3 sliding blocks are arranged above the auxiliary processing side and fixed above the gantry, so that the stability in the motion process is ensured. Because the processing stroke of the shaft reaches 27m, the grating ruler is required to ensure the X-axis precision, and foreign matters such as scrap iron and the like are prevented from polluting the grating ruler in the processing process, and the grating ruler is provided with a grating ruler shield.

4. The ultra-long stroke machining center for the double-spindle movable gantry for drilling and milling of the steel rail joint part, as recited in claim 1, is characterized in that: the double-spindle movable gantry overlong-stroke machining center for drilling and milling the steel rail joint part is provided with 3 groups of sliding blocks (11), so that the gantry can stably move above a steel guide rail, and a clamping block (12) can clamp the gantry; processed rail (15), rail are after hoist to the workstation, and electric permanent magnet sucking disc (13) adsorb the rail end, and pneumatic cylinder (17) supplementary compress tightly the railhead to there are guide pillar guide pin bushing structure (18), and the horizontal direction has location dog (16) and pneumatic cylinder, guarantees rail clamping efficiency at every turn, and electric permanent magnet sucking disc (13) top is equipped with leads magnetic pad (14).

5. The ultra-long stroke machining center for the double-spindle movable gantry for drilling and milling of the steel rail joint part, as recited in claim 1, is characterized in that: the double-spindle movable gantry ultra-long stroke machining center for drilling and milling the steel rail joint part also comprises a special-shaped steel rail clamp, and due to the structural particularity of the special-shaped steel rail, if auxiliary support is not provided, the special fixture which is unstable during processing comprises a fixture mounting seat (19) and a hydraulic cylinder (20) which drive a fixture body (25) to move left and right at a movement angle of 30 degrees, when no steel rail is arranged, the clamp body (25) deflects anticlockwise by 30 degrees, after the steel rail is hoisted and falls on the clamp body (25), pneumatic cylinder (21) remove, drive T type slider (22) forward movement, and clamp splice (23) push away rail (24) and target in place, guarantee that rail and anchor clamps body (25) laminate completely, and anchor clamps body (25) clockwise deflect 30, guarantee that the rail machined surface is parallel with table surface, then process, and clamp splice (23) are multiunit installation screw hole structure.

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