A boring machine special for pin hole processing

Abstract

The utility model provides a kind of boring machine special for pin hole processing, belong to large engineering machinery manufacturing and maintenance field, it includes base, the bottom of base is equipped with the arc groove that can be matched with portal frame flange, the upper portion of base is fixed with bed and jacking mechanism, the inside vertical mounting of bed has ball screw, the top of bed is fixedly installed with stepper motor, the output end of stepper motor is fixedly connected with the upper end of ball screw, ball screw is connected with the power mechanism for boring by nut;The jacking mechanism is provided with two, and respectively located the left and right sides of bed, each jacking mechanism includes jacking cylinder and gyro wheel, when the piston rod of jacking cylinder extends, can push gyro wheel and the plane contact of portal frame flange, and lift base from the plane of portal frame flange, the utility model solves the technical problem of the prior art in moving boring machine processing portal frame pin hole when occupying a lot of time, influence production period and increase production cost.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing and maintenance of large-scale engineering machinery, and in particular to a boring machine for processing pin holes. Background Technology

[0002] In the field of large-scale engineering machinery manufacturing and maintenance, the gantry frame of special equipment such as the 7500 stacker-reclaimer is a core load-bearing and rotating component, and its structural machining accuracy directly affects the operational stability of the equipment. Existing gantry frame rotating structures are mainly divided into two categories: one is a gear ring structure, which is completed by machining the connecting flange surface with a flange milling machine and then drilling the gear ring fastening holes with a drilling machine; the other is a sprocket and pin structure, which requires equally spaced pin holes machined around the perimeter of the gantry frame, and the rotation function is achieved through the cooperation of the pin and the sprocket. The latter is widely used due to its convenient maintenance and low cost.

[0003] For machining pin holes in portal frame structures with sprockets and pin shafts, existing technologies often employ mobile boring machines for on-site processing. These mobile boring machines typically include a base, bed, power head, and hydraulic system. During machining, the portal frame must be hoisted to the designated workstation using a crane, and then the mobile boring machine is transported to the flange plane of the portal frame. Before machining, the boring machine's position is manually adjusted to ensure the perpendicularity and coaxiality of the pin holes. The boring machine is then fixed to the flange surface using bolts or temporary welding. The power head drives the boring bar to rotate via a motor, and the feed action is achieved through a lead screw drive, completing the roughing and finishing of the pin holes. For single-piece, small-batch production of portal frames, this type of equipment can meet basic machining requirements, and its power system and transmission structure can guarantee a certain level of machining accuracy.

[0004] However, existing mobile boring machines have the following drawbacks when machining pin holes in gantry frames: Because the gantry frame is enormous (nearly 3 meters high and over 10 meters long and wide), and the pin holes need to be evenly distributed along the flange perimeter, the entire boring machine must be lifted and moved by a crane after each pin hole is machined. This results in a significant time commitment for each relocation, severely impacting production schedules and increasing production costs due to frequent crane use. Utility Model Content

[0005] This application provides a dedicated boring machine for pin hole processing, which solves the technical problem in the prior art where, when processing pin holes on a portal frame using a mobile boring machine, the boring machine needs to be lifted and moved by a crane after each pin hole is processed, resulting in a large amount of time being occupied, affecting the production schedule, and increasing production costs.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a boring machine for pin hole processing, including a base, the bottom of which is provided with an arc groove that can match the flange of the gantry frame, the upper bottom surface of which can fit against the plane of the gantry frame flange, a bed and a lifting mechanism are fixed on the upper part of the base, a ball screw is vertically installed inside the bed, a stepper motor is fixedly installed on the top of the bed, the output end of the stepper motor is fixedly connected to the upper end of the ball screw, and the ball screw is connected to a power mechanism for boring through a nut; there are two lifting mechanisms, located on the left and right sides of the bed respectively, each lifting mechanism including a lifting cylinder and a roller, the piston rod of the lifting cylinder is connected to the bracket of the roller, and the extension and retraction direction of the lifting cylinder is perpendicular to the plane of the gantry frame flange, when the piston rod of the lifting cylinder extends, it can push the roller to contact the plane of the gantry frame flange and lift the base away from the plane of the gantry frame flange.

[0007] When in operation, this device is placed on the gantry flange. After positioning using the arc-shaped groove at the bottom of the base, the pin holes are machined via a power mechanism. When one pin hole is finished and a new machining position is needed, the piston rod of the lifting cylinder of the jacking mechanism extends, pushing the rollers to contact the gantry flange plane and lifting the base away. The device is then moved to the next machining position, and the lifting cylinder retracts to bring the base back into contact with the gantry flange plane for subsequent machining. Because the base has an arc-shaped groove at the bottom that matches the gantry flange, the device can be placed correctly. Furthermore, the lifting mechanism allows for alternating support between the rollers and the base via the extension and retraction of the lifting cylinder. Therefore, the device can be moved on the gantry flange without the need for a crane, saving time spent on frequent crane operations, shortening the production cycle, and reducing processing costs.

[0008] As a further improvement to the above solution, the base is also equipped with an adjusting clamping cylinder. The cylinder body of the adjusting clamping cylinder is fixed to the base, and the piston rod of the adjusting clamping cylinder passes through the side wall of the base and points to the arc surface of the gantry flange.

[0009] As a further improvement to the above solution, at least four adjusting clamping cylinders are provided, and adjusting clamping cylinders are installed at the four corners of the base; thus, when the device is placed on the gantry flange, the position of the device can be finely adjusted by adjusting the extension and retraction of the piston rod, so that the power mechanism is precisely aligned with the center of the pin hole to be processed.

[0010] As a further improvement to the above solution, an arc-shaped pad adapted to the arc surface of the gantry flange is fixed to the end of the piston rod of the adjusting clamping cylinder. When the piston rod of the adjusting cylinder extends, the arc-shaped pad can fit against the inner and / or outer arc surfaces of the gantry flange. This increases the contact area between the adjusting clamping cylinder and the gantry flange, allowing the clamping force to be transmitted more evenly to the gantry flange, avoiding excessive local stress that could damage the gantry flange or the cylinder piston rod, and also enhancing the clamping stability between the device and the gantry flange.

[0011] As a further improvement to the above solution, a hydraulic station is also installed on the base. The hydraulic station is connected to the lifting cylinder and the adjusting clamping cylinder through an oil circuit, and the power mechanism and the hydraulic station are located on the front and rear sides of the bed, respectively. The power mechanism and the hydraulic station are located on the front and rear sides of the bed, which can balance the weight on both sides of the base, prevent the base from tilting due to uneven force, and enhance the stability of the overall structure.

[0012] As a further improvement to the above solution, the power mechanism includes a power head body and a boring bar, the boring bar being vertically mounted at the lower end of the power head body, and a boring tool being mounted at the lower end of the boring bar.

[0013] As a further improvement to the above solution, the bed has vertical grooves on both sides, and the left and right sides of the power head body are correspondingly engaged in the grooves of the bed and can slide vertically along the grooves; the center position of the power head body near the bed is fixedly connected to the nut outside the ball screw; this can prevent the power head body from deviating or shaking during the feeding process and ensure that the boring bar always remains perpendicular to the flange plane of the gantry frame.

[0014] As a further improvement to the above solution, the lifting mechanism also includes a support column and a connecting beam, wherein the bottom of the support column is fixedly connected to the base and the top of the support column is fixedly connected to the connecting beam.

[0015] As can be seen from the above technical solutions, this utility model has at least the following technical effects or advantages:

[0016] 1. When this device is in operation, it is placed on the gantry flange. After positioning using the arc-shaped groove at the bottom of the base, the pin holes are machined via a power mechanism. When one pin hole is finished and the machining position needs to be changed, the piston rod of the lifting cylinder of the lifting mechanism extends, pushing the rollers to contact the gantry flange plane and lifting the base away. The device is then moved to the next machining position, and the lifting cylinder is retracted to bring the base back into contact with the gantry flange plane for subsequent machining. Because the bottom of the base has an arc-shaped groove that matches the gantry flange, the device can be placed correctly. Furthermore, the lifting mechanism can alternately support the rollers and base through the extension and retraction of the lifting cylinder. Therefore, the device can be moved on the gantry flange without the need for a crane, saving time spent on frequent crane lifting, shortening the production cycle, and reducing processing costs.

[0017] 2. Since at least four adjusting clamping cylinders are installed on the base, with the cylinder body fixed to the base and the piston rod penetrating the side wall of the base and pointing towards the arc surface of the gantry flange, after the device is initially positioned, the position of the device can be finely adjusted by adjusting the extension and retraction of the piston rod, so that the power mechanism is precisely aligned with the center of the pin hole to be processed. During processing, the piston rod extends to apply force to fasten the device to the gantry flange. This not only achieves precise alignment of the processing position, but also prevents the device from shaking or shifting during processing, effectively ensuring the processing accuracy and stability of the pin hole.

[0018] 3. Because the piston rod end of the adjusting clamping cylinder is fixed with an arc-shaped pad that matches the arc surface of the gantry flange, when the piston rod of the adjusting cylinder extends, the arc-shaped pad can fit against the inner and / or outer arc surfaces of the gantry flange. This increases the contact area between the adjusting clamping cylinder and the gantry flange, allowing the clamping force to be transmitted more evenly to the gantry flange. This avoids excessive local stress that could damage the gantry flange or the cylinder piston rod, and also enhances the clamping stability between the device and the gantry flange, further ensuring the fixing effect and machining accuracy of the device during processing. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is the front view of the present invention;

[0022] Figure 3This is a schematic diagram illustrating the use of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Base, 2. Portal frame flange, 3. Arc groove, 4. Bed, 401. Slide, 5. Lifting mechanism, 501. Lifting cylinder, 502. Roller, 503. Support column, 504. Connecting beam, 6. Ball screw, 7. Stepper motor, 8. Power mechanism, 801. Power head body, 802. Boring rod, 9. Adjusting clamping cylinder, 10. Arc-shaped pad, 11. Hydraulic station. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0025] This utility model discloses a boring machine specifically for processing pin holes, such as... Figures 1 to 3 As shown, it includes a base 1, the bottom of which has an arc-shaped groove 3 that matches the gantry flange 2. The upper bottom surface of the arc-shaped groove 3 can fit against the plane of the gantry flange 2. A bed 4 and a lifting mechanism 5 are fixed to the upper part of the base 1. A ball screw 6 is vertically installed inside the bed 4. A stepper motor 7 is fixedly installed on the top of the bed 4. The output end of the stepper motor 7 is fixedly connected to the upper end of the ball screw 6. The ball screw 6 is connected to a power unit for boring through a nut. Structure 8; There are two lifting mechanisms 5, located on the left and right sides of the bed 4 respectively. Each lifting mechanism 5 includes a lifting cylinder 501 and a roller 502. The piston rod of the lifting cylinder 501 is connected to the bracket of the roller 502, and the extension and retraction direction of the lifting cylinder 501 is perpendicular to the plane of the door flange. When the piston rod of the lifting cylinder 501 extends, it can push the roller 502 to contact the plane of the door flange 2 and lift the base 1 away from the plane of the door flange 2.

[0026] In this embodiment, the two side walls of the arcuate groove 3 at the bottom of the base 1 are clearance-fitted with the inner and outer side walls of the gantry flange 2, thereby ensuring that the base 1 can be placed on the gantry flange 2. The bed 4 is vertically fixed to the upper surface of the base 1. The bed 4 has a hollow internal structure. The ball screw 6 is vertically installed along the central axis of the bed 4, and its upper and lower ends are connected to the inner wall of the bed 4 through bearing seats to ensure the stability of the ball screw 6 during rotation. The stepper motor 7 is fixed to the top of the bed 4, and its output shaft is connected to the upper end of the ball screw 6 to achieve direct power transmission. The power mechanism 8 is connected to the ball screw 6 through a nut. When the stepper motor 7 drives the ball screw 6 to rotate, the power mechanism 8 can move up and down along the height direction of the bed 4 to realize the boring feed action. Two lifting mechanisms 5 are symmetrically arranged on the left and right sides of the bed 4. When the boring machine needs to be moved, the piston rod of the lifting cylinder 501 extends, pushes the roller 502 to contact the plane of the gantry flange 2, and lifts the base 1 away, so that the operator can easily push the boring machine to the next processing position.

[0027] The base 1 is also equipped with an adjusting clamping cylinder 9. The cylinder body of the adjusting clamping cylinder 9 is fixed to the base 1, and the piston rod of the adjusting clamping cylinder 9 passes through the side wall of the base 1 and points towards the arc surface of the gantry flange 2. At least four adjusting clamping cylinders 9 are provided, and they are respectively installed at the four corners of the base 1. The cylinder body of the adjusting clamping cylinder 9 is firmly fixed to the base 1, and its piston rod can extend and retract. When the piston rod extends, it points towards the arc surface of the gantry flange 2. Thus, by adjusting the extension and retraction of the piston rod, slight adjustments to the position of the boring machine on the plane of the gantry flange 2 can be achieved, facilitating accurate machining positioning. Moreover, the coordinated action of the four corner adjusting clamping cylinders 9 allows for more stable fine-tuning of the boring machine's position, ensuring the accuracy of the adjustment.

[0028] An arc-shaped pad 10, which matches the arc surface of the gantry flange 2, is fixed to the end of the piston rod of the adjusting clamping cylinder 9. When the piston rod of the adjusting cylinder extends, the arc-shaped pad 10 can fit against the inner and / or outer arc surfaces of the gantry flange 2. Thus, by adjusting the force applied by the clamping cylinder 9, the boring machine is fixed to the gantry flange 2, preventing the boring machine from shaking during boring and ensuring the stability and accuracy of the machining process.

[0029] like Figure 3As shown, a hydraulic station 11 is also installed on the base 1. The hydraulic station 11 is connected to the lifting cylinder 501 and the adjusting clamping cylinder 9 via oil circuits. The hydraulic station 11 provides hydraulic power to the lifting cylinder 501 and the adjusting clamping cylinder 9, thereby controlling the extension and retraction of the cylinders by controlling the opening and closing of the oil circuits and the pressure. The power mechanism 8 and the hydraulic station 11 are located on the front and rear sides of the bed 4, respectively. The hydraulic station 11 is fixed to the rear side of the upper part of the base 1, and its overall weight is roughly matched with that of the power mechanism 8. Since the power mechanism 8 includes the power head body 801 and the boring bar 802, has a certain weight, and is located on the front side of the bed 4, arranging the hydraulic station 11 on the rear side of the bed 4 can form a weight balance, making the force on the front and rear sides of the base 1 more even, avoiding tilting or shaking of the boring machine during operation due to excessive weight on one side, and contributing to the overall stability of the device.

[0030] The power mechanism 8 includes a power head body 801 and a boring bar 802. The boring bar 802 is vertically mounted at the lower end of the power head body 801, and a boring tool can be mounted at the lower end of the boring bar 802. The power head body 801 provides rotational power to the boring bar 802, driving the boring bar 802 and the boring tool mounted at its lower end to rotate, thereby boring the pin holes of the portal frame. In addition, different types of boring tools can be replaced at the lower end of the boring bar 802 according to processing requirements to complete different processes such as roughing and finishing.

[0031] like Figure 1 , Figure 3 As shown, the machine bed 4 has vertical grooves 401 on both sides. The left and right sides of the power head body 801 are correspondingly engaged in the grooves 401 of the machine bed 4 and can slide vertically along the grooves 401. The center position of the power head body 801 near the machine bed 4 is fixedly connected to the nut on the outside of the ball screw 6. The grooves 401 on both sides of the machine bed 4 provide guidance for the up and down sliding of the power head body 801, ensuring that the power head body 801 will not deviate during movement, ensuring the verticality of the boring bar 802, and thus ensuring the machining accuracy of the pin hole. The fixed connection between the power head body 801 and the nut on the outside of the ball screw 6 allows the rotational motion of the ball screw 6 to be accurately converted into the linear motion of the power head body 801, achieving stable feed.

[0032] In this embodiment, the lifting mechanism 5 further includes a support column 503 and a connecting beam 504. The bottom of the support column 503 is fixedly connected to the base 1, and the top of the support column 503 is fixedly connected to the connecting beam 504. The support column 503 is perpendicular to the surface of the base 1 and provides support for the connecting beam 504. The connecting beam 504 extends outward to the outer edge of the base 1, causing the lifting cylinder 501 and roller 502 mounted on it to extend beyond the range of the base 1. When the piston rod of the lifting cylinder 501 extends, due to the extension of the connecting beam 504, the roller 502 can avoid the obstruction of the base 1 and make contact with the plane of the gantry flange 2, thereby smoothly lifting the base 1 away from the gantry flange 2 and ensuring the realization of the boring machine's movement function.

[0033] In actual operation, the boring machine is placed on the gantry flange 2, and initial positioning is achieved by utilizing the arc groove 3 at the bottom of the base 1 and its engagement with the gantry flange 2. The position of the boring machine is adjusted by operating the four corner clamping cylinders 9 of the base 1, aligning the boring bar 802 in the power mechanism 8 with the center of the pin hole to be machined, thus completing the alignment. Afterwards, the piston rods of all the clamping cylinders 9 extend, and the boring machine is fixed to the gantry flange 2 by the arc-shaped pad 10. Next, the power mechanism 8 moves up and down under the drive of the stepper motor 7 and the ball screw 6, while the boring bar 802 rotates to machine the pin hole. Once one pin hole is machined, the clamping cylinders 9 retract, the lifting cylinder 501 extends, causing the roller 502 to touch the ground, pushing the boring machine to the next position. This process is repeated until all pin holes are machined.

[0034] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A boring machine specifically for processing pin holes, characterized in that, The system includes a base (1), the bottom of which is provided with an arc groove (3) that matches the gantry flange (2). The upper bottom surface of the arc groove (3) can fit against the plane of the gantry flange (2). A bed (4) and a lifting mechanism (5) are fixed on the upper part of the base (1). A ball screw (6) is vertically installed inside the bed (4). A stepper motor (7) is fixedly installed on the top of the bed (4). The output end of the stepper motor (7) is fixedly connected to the upper end of the ball screw (6). The ball screw (6) is connected to a power unit for boring through a nut. Structure (8); There are two lifting mechanisms (5), which are located on the left and right sides of the bed (4) respectively. Each lifting mechanism (5) includes a lifting cylinder (501) and a roller (502). The piston rod of the lifting cylinder (501) is connected to the bracket of the roller (502), and the extension and retraction direction of the lifting cylinder (501) is perpendicular to the plane of the door flange. When the piston rod of the lifting cylinder (501) extends, it can push the roller (502) to contact the plane of the door frame flange (2) and lift the base (1) away from the plane of the door frame flange (2).

2. The boring machine for pin hole machining according to claim 1, characterized in that, The base (1) is also equipped with an adjusting clamping cylinder (9). The cylinder body of the adjusting clamping cylinder (9) is fixed to the base (1). The piston rod of the adjusting clamping cylinder (9) passes through the side wall of the base (1) and points to the arc surface of the door frame flange (2).

3. A boring machine for pin hole machining according to claim 2, characterized in that, At least four adjustable clamping cylinders (9) are provided, and adjustable clamping cylinders (9) are installed at the four corners of the base (1).

4. A boring machine for pin hole machining according to claim 3, characterized in that, The piston rod end of the adjusting clamping cylinder (9) is fixed with an arc-shaped pad (10) that is adapted to the arc surface of the gantry flange (2). When the piston rod of the adjusting cylinder extends, the arc-shaped pad (10) can fit against the inner arc surface and / or outer arc surface of the gantry flange (2).

5. A boring machine for pin hole machining according to claim 1, characterized in that, A hydraulic station (11) is also installed on the base (1). The hydraulic station (11) is connected to the lifting cylinder (501) and the adjusting clamping cylinder (9) through an oil circuit. The power mechanism (8) and the hydraulic station (11) are located on the front and rear sides of the bed (4), respectively.

6. A boring machine for pin hole machining according to claim 1, characterized in that, The power mechanism (8) includes a power head body (801) and a boring bar (802). The boring bar (802) is vertically installed at the lower end of the power head body (801), and a boring tool can be installed at the lower end of the boring bar (802).

7. A boring machine for pin hole machining according to claim 1, characterized in that, The bed (4) has vertical grooves (401) on both sides. The left and right sides of the power head body (801) are respectively engaged in the grooves (401) of the bed (4) and can slide vertically along the grooves (401). The center position of the power head body (801) near the bed (4) is fixedly connected to the nut outside the ball screw (6).

8. A boring machine for pin hole machining according to claim 1, characterized in that, The lifting mechanism (5) also includes a support column (503) and a connecting beam (504). The bottom of the support column (503) is fixedly connected to the base (1), and the top of the support column (503) is fixedly connected to the connecting beam (504).

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