Three-axis gantry full-process machining center for front axle of harvesting machine

Abstract

The utility model relates to the technical field of harvesting machinery processing, in particular to a three-axis gantry full-process processing center for a front axle of harvesting machinery. The machine tool comprises a machine tool frame, and a three-degree-of-freedom X-axis workbench, a Y-axis truss and a Z-axis spindle head which are arranged on the machine tool frame. The gantry full-process machining center is used for machining the front axle of the harvesting machine, and efficient and accurate machining of the front axle of the harvesting machine is achieved through the gantry full-process machining center with three shafts working cooperatively. By arranging a protection plate and a chip removal machine, scrap iron is effectively prevented from splashing and accumulating, the safety of operators and the cleanliness of the machining environment are guaranteed, and the cleanliness of the machining environment is maintained; the cantilever type screen and the portable magnetic handheld unit box are additionally arranged, so that the convenience of monitoring and operation is improved; the integration of the pneumatic mechanism and the manipulator type tool changing mechanism obviously improves the automation level of the machining center, shortens the tool changing time and improves the machining efficiency; in addition, the band-type brake mechanism improves the safety of the machining center under the emergency situation, and the cutter pricking danger after power failure is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesting machinery processing, and particularly relates to a three-axis gantry full-process machining center for the front axle of a harvesting machine. Background Art

[0002] With the continuous advancement of the agricultural modernization process, the level of agricultural mechanization has been significantly improved, resulting in a sharp increase in the market demand for harvesting machinery, thus posing more stringent requirements for the processing accuracy and production efficiency of the front axle components of harvesting machinery. To address this challenge, technical experts in this field have actively engaged in technological innovation and research and development, aiming to solve the bottlenecks of existing technologies.

[0003] Although there are solutions such as the light gantry carving and milling machining center disclosed in Chinese Patent CN104985485A, which integrate advanced elements such as a machine bed, a column, a multi-axis drive system, and a tool changer, and improve the processing ability to a certain extent, the traditional processing mode still has deficiencies in terms of efficiency, accuracy, and processing environment friendliness, and it is difficult to fully meet the current and future agricultural production requirements for high-quality and high-efficiency harvesting machinery, especially the processing requirements for the front axles of harvesting machinery with various lengths within 2100 mm. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a three-axis gantry full-process machining center for the front axle of a harvesting machine.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A three-axis gantry full-process machining center for the front axle of a harvesting machine, comprising a machine tool frame and an X-axis workbench, a Y-axis truss, and a Z-axis spindle head with three degrees of freedom arranged on the machine tool frame for machining the front axle of a harvesting machine, wherein:

[0007] The machine tool frame is used to support the entire machining center, is placed horizontally, has a base at its bottom, and a protective plate and a chip conveyor are arranged on the side of the base. The protective plate is used to prevent iron chips from splashing outside the machining center, and the chip conveyor is used to collect and discharge iron chips;

[0008] The X-axis workbench is used to drive the front axle of the harvesting machine to move along the X-axis, is parallel to the horizontal arrangement direction of the base, and includes a workbench surface. The workbench surface is connected to an X-axis motor on the base through an X-axis lead screw; X-axis guide rails are arranged on both sides of the X-axis lead screw for guiding the X-axis lead screw;

[0009] The Y-axis truss is used for Y-axis movement relative to the X-axis workbench. It includes a truss built by lifting columns and a crossbeam. The bottoms of the lifting columns are respectively controlled for lifting actions through the crossbeam sleeper I and the crossbeam sleeper II. A Y-axis guide rail and a horizontal ram are arranged on the crossbeam. The horizontal ram moves along the Y-axis guide rail driven by a Y-axis motor, so as to perform Y-axis movement relative to the front axle of the harvesting machine.

[0010] The Z-axis spindle head is used for Z-axis movement relative to the X-axis workbench. It includes a Z-axis guide rail arranged on the horizontal ram. A vertical ram is arranged on the Z-axis guide rail. The vertical ram performs Z-axis movement relative to the horizontal ram, so as to drive the spindle cutter head located on the vertical ram to perform three-degree-of-freedom actions.

[0011] Through the coordinated work of the X-axis workbench, Y-axis truss and Z-axis spindle head with three degrees of freedom, this technical solution realizes the efficient and precise machining of the front axle of the harvesting machine, and at the same time ensures the safety and cleanliness of the machining process. Specifically, the machining center includes four main parts: a machine tool frame, an X-axis workbench, a Y-axis truss and a Z-axis spindle head. Through precise mechanical connection and control system working together, they jointly complete the machining task of the front axle of the harvesting machine; the machine tool frame provides a stable working platform to ensure the stability and precision during the machining process; the X-axis workbench realizes the precise movement of the front axle of the harvesting machine in the X-axis direction through the X-axis motor and the X-axis lead screw; the Y-axis truss realizes the flexible movement of the spindle cutter head in the Y-axis direction through the truss structure composed of lifting columns and a crossbeam, as well as the Y-axis motor and the guide rail to meet the requirements of different machining positions; in the Z-axis direction, the Z-axis spindle head realizes the up and down adjustment of the spindle cutter head through the movement of the vertical ram on the Z-axis guide rail, so as to complete the control of the cutting depth; to achieve high-precision machining, this machining center adopts a variety of precision control measures: the X-axis, Y-axis and Z-axis are all equipped with high-precision guide rail systems to ensure the linearity of the movement of each axis, reduce vibration and error; when necessary, each axis is also equipped with a brake mechanism to prevent position deviation caused by external force or vibration during the machining process; to ensure the safety of operators and the cleanliness of the machining environment, the machining center is also provided with a safety protection and chip removal system; the protection plate is arranged on the side of the base of the machine tool frame to block the iron chips and splashes generated during the machining process, prevent them from shooting outside the machining center, and protect the operators from harm; the chip removal machine timely collects and discharges the iron chips generated during the machining process to keep the machining area clean and avoid the influence of iron chip accumulation on the machining precision and machine tool performance.

[0012] In addition, according to the above-mentioned three-axis gantry full-process machining center for the front axle of the harvesting machine proposed by the present invention, it can also have the following additional technical features:

[0013] According to an embodiment of the present invention, the protection plate of the machine tool frame adopts a folding plate for height adjustment according to the degree of iron chip ejection.

[0014] This technical solution improves the flexibility of the full-process machining center of the three-axis gantry for the front axle of the harvesting machine by introducing a folding protective plate, enabling it to adjust the protective height according to the actual degree of iron chip ejection and enhancing operational safety.

[0015] According to an embodiment of the present utility model, the chip conveyor of the machine tool frame adopts a spiral chip conveyor line to transport the iron chips to one end of the machining center, where they are collected and discharged by the filter box on the water tank.

[0016] This technical solution optimizes the chip removal system of the full-process machining center of the three-axis gantry for the front axle of the harvesting machine through a spiral chip conveyor line in cooperation with the filter box on the water tank, ensuring the effective collection and discharge of iron chips and maintaining the cleanliness of the machining environment.

[0017] According to an embodiment of the present utility model, the machine tool frame further includes a cantilever screen that rotates 300 degrees relative to the base and is equipped with a portable magnetic adsorption handheld unit box.

[0018] This technical solution enhances the monitoring and operation convenience of the machining center by adding a cantilever screen and a portable magnetic adsorption handheld unit box, enabling the operator to flexibly adjust the viewing angle and quickly obtain tools, thereby improving work efficiency.

[0019] According to an embodiment of the present utility model, a universal cooling nozzle is installed at the front end of the spindle tool head of the Z-axis spindle head. The universal cooling nozzle is connected to a cooling water pump or a cooling fan to cool the spindle tool head by water cooling or air cooling; the cooling water pump is connected to a water tank, and the water tank is provided with a large-angle inclined surface to ensure the rapid collection and circulation of the coolant.

[0020] This technical solution effectively cools the spindle tool head by installing a universal cooling nozzle at the front end of the spindle tool head of the Z-axis spindle head. Whether it is water cooling or air cooling, it can ensure temperature control during the machining process and extend the service life of the tool.

[0021] According to an embodiment of the present utility model, the spindle tool head of the Z-axis spindle head adopts P4-level high-speed angular contact bearings, and the bearings use high-temperature grease to ensure that the rotational speed of the spindle tool head is 6000 r / min.

[0022] This technical solution improves the performance of the Z-axis spindle head by selecting P4-level high-speed angular contact bearings and applying high-temperature grease, ensuring that the spindle tool head can operate stably at a rotational speed of up to 6000 r / min to meet the requirements of high-precision machining.

[0023] According to an embodiment of the present utility model, the Z-axis spindle head further includes a pneumatic mechanism and a tool changing mechanism. The pneumatic mechanism includes a pneumatic triple unit and a pneumatic solenoid valve. The pneumatic triple unit filters the air source through an air filter and an oil mist separator to ensure that the air source used by the tool changing mechanism is dry and free of impurities. The pneumatic solenoid valve is used to quickly respond to the tool changing and blowing actions of the machining center.

[0024] The tool changing mechanism is a robotic arm type tool changer. The tool-to-tool changing time is 3.8 seconds, and it can accommodate several spindle tool heads.

[0025] This technical solution integrates a pneumatic mechanism and a robotic arm type tool changing mechanism to improve the automation level of the three-axis gantry full-process machining center for the front axle of the harvesting machine. The tool changing time is shortened through a quickly responsive tool changing system, and the machining efficiency is improved.

[0026] According to an embodiment of the present utility model, the X-axis workbench, Y-axis truss, and Z-axis spindle head are all provided with brake mechanisms. The brake mechanisms are respectively matched with the X-axis guide rail, Y-axis guide rail, and Z-axis guide rail to lock the movement in time and prevent the danger of tool jamming after power failure.

[0027] This technical solution enhances the safety performance of the machining center by setting brake mechanisms on the X-axis workbench, Y-axis truss, and Z-axis spindle head, ensuring that the moving parts can be locked in time in case of power failure or other emergencies to prevent dangerous situations such as tool jamming.

[0028] According to an embodiment of the present utility model, three power heads and three tool magazines are further provided on the machine tool frame, where:

[0029] One power head is of a vertical structure, cooperating with one tool magazine and using a single channel alone, for machining the transmission connection surface of the pipe beam.

[0030] The other two power heads are of a horizontal structure, respectively cooperating with two tool magazines and using a single channel together, for simultaneously and symmetrically machining the two end faces of the pipe beam.

[0031] By simultaneously controlling the actions of the three power heads, the spatial requirements of the connection positions between the side reducer assembly and the transmission assembly are met.

[0032] Compared with the prior art, the present utility model has the following beneficial effects:

[0033] (1) Through the three-axis collaborative working gantry full-process machining center, efficient and precise machining of the front axle of the harvesting machine is achieved.

[0034] (2) The settings of the protective plate and the chip conveyor effectively prevent the splashing and accumulation of iron chips, ensuring the safety of the operators and the cleanliness of the machining environment, and maintaining the cleanliness of the machining environment.

[0035] (3) The addition of a cantilever screen and a portable magnetic suction handheld unit box improves the convenience of monitoring and operation; the integration of a pneumatic mechanism and a manipulator-type tool change mechanism significantly enhances the automation level of the machining center, shortens the tool change time, and improves the machining efficiency; in addition, the brake mechanism improves the safety of the machining center in case of emergency and prevents the risk of tool jamming after power failure. Description of the Drawings

[0036] Figure 1 is the front view of the present utility model.

[0037] Figure 2 is one of the perspective views of the present utility model.

[0038] Figure 3 is the other perspective view of the present utility model.

[0039] Figure 4 is the top view of the present utility model.

[0040] In the figures: 1, machine tool frame; 11, base; 12, protective plate; 13, chip conveyor; 2, X-axis worktable; 21, worktable surface; 22, X-axis guide rail; 23, X-axis lead screw; 3, Y-axis truss; 31, lifting column; 32, cross beam; 33, Y-axis guide rail; 34, horizontal ram; 35, cross beam horizontal spindle I; 36, cross beam horizontal spindle II; 4, Z-axis spindle head; 41, Z-axis guide rail; 42, vertical ram; 43, spindle tool head. Detailed Implementation Modes

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0042] Embodiment 1

[0043] As Figures 1 to 4 shown, this embodiment provides a three-axis gantry full-process machining center for the front axle of a harvesting machine, including a machine tool frame 1 and a three-degree-of-freedom X-axis worktable 2, Y-axis truss 3, and Z-axis spindle head 4 arranged on the machine tool frame 1 for machining the front axle of the harvesting machine, wherein:

[0044] The machine tool frame 1 is used to support the entire machining center, which is placed horizontally. A base 11 is provided at its bottom, and a protective plate 12 and a chip conveyor 13 are provided on the side of the base 11. The protective plate 12 is used to prevent iron chips from splashing outside the machining center, and the chip conveyor 13 is used to collect and discharge the iron chips;

[0045] The X-axis workbench 2 is used to drive the front axle of the harvesting machine to move along the X-axis, which is parallel to the horizontal arrangement direction of the base 11. It includes a workbench surface 21, and the workbench surface 21 is connected to the X-axis motor on the base 11 through an X-axis lead screw 23; X-axis guide rails 22 are arranged on both sides of the X-axis lead screw 23, and the X-axis guide rails 22 are used to guide the X-axis lead screw 23;

[0046] The Y-axis truss 3 is used to move along the Y-axis relative to the X-axis workbench 2. It includes a truss built by a lifting column 31 and a cross beam 32. The bottom parts of the lifting columns 31 are respectively controlled for lifting actions through a cross beam pillow block I 35 and a cross beam pillow block II 36; a Y-axis guide rail 33 and a horizontal ram 34 are arranged on the cross beam 32, and the horizontal ram 34 moves along the Y-axis guide rail 33 under the drive of a Y-axis motor, so as to move along the Y-axis relative to the front axle of the harvesting machine;

[0047] The Z-axis spindle head 4 is used to move along the Z-axis relative to the X-axis workbench 2. It includes a Z-axis guide rail 41 arranged on the horizontal ram 34, and a vertical ram 42 is arranged on the Z-axis guide rail 41. The vertical ram 42 moves along the Z-axis relative to the horizontal ram 34, so as to drive the spindle cutter head 43 located on the vertical ram 42 to perform three-degree-of-freedom actions.

[0048] As Figures 1 to 4As shown in the figure, this technical solution realizes the efficient and precise machining of the front axle of the harvesting machine through the coordinated work of the X-axis workbench 2 with three degrees of freedom, the Y-axis truss 3, and the Z-axis spindle head 4, while ensuring the safety and cleanliness of the machining process. Specifically, the machining center includes four main parts: the machine tool frame 1, the X-axis workbench 2, the Y-axis truss 3, and the Z-axis spindle head 4. Through precise mechanical connection and the coordinated work of the control system, they jointly complete the machining task of the front axle of the harvesting machine; the machine tool frame 1 provides a stable working platform to ensure the stability and precision during the machining process; the X-axis workbench 2 realizes the precise movement of the front axle of the harvesting machine in the X-axis direction through the X-axis motor and the X-axis lead screw 23; the Y-axis truss 3 is composed of a truss structure formed by the lifting column 31 and the cross beam 32, as well as the Y-axis motor and the guide rail, realizing the flexible movement of the spindle tool head 43 in the Y-axis direction to meet the requirements of different machining positions; the Z-axis spindle head 4 realizes the up and down adjustment of the spindle tool head 43 in the Z-axis direction through the movement of the vertical ram 42 on the Z-axis guide rail 41, thereby completing the control of the cutting depth; to achieve high-precision machining, this machining center adopts a variety of precision control measures: the X-axis, Y-axis, and Z-axis are all equipped with high-precision guide rail systems to ensure the linearity of the movement of each axis, reduce vibration and error; when necessary, each axis is also equipped with a brake mechanism to prevent position deviation caused by external force or vibration during the machining process; to ensure the safety of the operator and the cleanliness of the machining environment, the machining center is also provided with a safety protection and chip removal system; the protective plate 12 is arranged on the side of the base 11 of the machine tool frame 1 to block the iron chips and splashes generated during the machining process, prevent them from shooting outside the machining center, and protect the operator from harm; the chip removal machine 13 timely collects and discharges the iron chips generated during the machining process to keep the machining area clean and avoid the impact of iron chip accumulation on the machining precision and the performance of the machine tool.

[0049] In addition, according to the above-mentioned three-axis gantry full-process machining center for the front axle of the harvesting machine proposed by the present utility model, it can also have the following additional technical features:

[0050] According to an embodiment of the present utility model, the protective plate 12 of the machine tool frame 1 adopts a folding plate for height adjustment according to the degree of iron chip ejection.

[0051] This technical solution introduces a folding protective plate 12 to improve the flexibility of the three-axis gantry full-process machining center for the front axle of the harvesting machine, enabling it to adjust the protection height according to the actual degree of iron chip ejection and enhancing the operation safety.

[0052] According to an embodiment of the present utility model, the chip removal machine 13 of the machine tool frame 1 adopts a spiral chip removal pipeline to transport the iron chips to one end of the machining center, and is collected and discharged by the filter box on the water tank.

[0053] This technical solution uses a spiral chip removal pipeline in cooperation with a filter box on the water tank to optimize the chip removal system of the full-process machining center for the front axle three-axis gantry of the harvesting machine, ensuring the effective collection and discharge of iron chips and maintaining the cleanliness of the machining environment.

[0054] According to an embodiment of the present invention, the machine tool frame 1 further includes a cantilever screen that rotates 300 degrees relative to the base 11 and is equipped with a portable magnetic adsorption handheld unit box.

[0055] This technical solution enhances the monitoring and operation convenience of the machining center by adding a cantilever screen and a portable magnetic adsorption handheld unit box, enabling the operator to flexibly adjust the viewing angle and quickly obtain tools, thereby improving work efficiency.

[0056] According to an embodiment of the present invention, a universal cooling nozzle is installed at the front end of the spindle tool head 43 of the Z-axis spindle head 4. The universal cooling nozzle is connected to a cooling water pump or a cooling fan to cool the spindle tool head 43 by water cooling or air cooling; the cooling water pump is connected to a water tank, and the water tank is provided with a large-angle inclined surface to ensure the rapid collection and circulation of the coolant.

[0057] This technical solution installs a universal cooling nozzle at the front end of the spindle tool head 43 of the Z-axis spindle head 4 to effectively cool the spindle tool head 43. Whether it is water cooling or air cooling, it can ensure temperature control during the machining process and extend the service life of the tool.

[0058] According to an embodiment of the present invention, the spindle tool head 43 of the Z-axis spindle head 4 uses P4-class high-speed angular contact bearings, and the bearings use high-temperature grease to ensure that the rotational speed of the spindle tool head 43 is 6000 r / min.

[0059] This technical solution improves the performance of the Z-axis spindle head 4 by selecting P4-class high-speed angular contact bearings and applying high-temperature grease, ensuring that the spindle tool head 43 can operate stably at a rotational speed of up to 6000 r / min to meet the requirements of high-precision machining.

[0060] According to an embodiment of the present invention, the Z-axis spindle head 4 further includes a pneumatic mechanism and a tool change mechanism. The pneumatic mechanism includes an air source triplet and a pneumatic solenoid valve. The air source triplet filters the air source through an air filter and an oil mist separator to ensure that the air source used by the tool change mechanism is dry and free of impurities; the pneumatic solenoid valve is used to quickly respond to the tool change and blowing actions of the machining center;

[0061] The tool change mechanism is a manipulator-type tool change, and the tool-to-tool change time is 3.8 seconds, accommodating several spindle tool heads 43.

[0062] This technical solution integrates a pneumatic mechanism and a manipulator-type tool change mechanism to improve the automation level of the full-process machining center for the front axle three-axis gantry of the harvesting machine, and shortens the tool change time through a fast-response tool change system to improve the machining efficiency.

[0063] According to an embodiment of the present invention, the X-axis workbench 2, the Y-axis truss 3, and the Z-axis spindle head 4 are all provided with brake mechanisms, and the brake mechanisms are respectively matched with the X-axis guide rail 22, the Y-axis guide rail 33, and the Z-axis guide rail 41 to lock the movement in time and prevent the danger of tool jamming after power failure.

[0064] This technical solution enhances the safety performance of the machining center by providing brake mechanisms on the X-axis workbench 2, the Y-axis truss 3, and the Z-axis spindle head 4, ensuring that the moving parts can be locked in time in case of power failure or other emergencies to prevent dangerous situations such as tool jamming.

[0065] According to an embodiment of the present invention, three power heads and three tool magazines are further provided on the machine tool frame, where:

[0066] One power head is of a vertical structure, cooperates with one tool magazine, and uses a single channel alone to machine the transmission connection surface of the pipe beam;

[0067] The other two power heads are of a horizontal structure, cooperate with two tool magazines respectively, and use a single channel together to symmetrically machine the two end faces of the pipe beam at the same time;

[0068] By simultaneously controlling the actions of the three power heads, the connection position space between the side reducer assembly and the transmission assembly meets the requirements.

[0069] The usage process of the above embodiment is as follows:

[0070] As Figures 1 to 4 shown, first, the X-axis workbench 2 drives the lead screw through the X-axis motor, driving the front axle of the harvesting machine to accurately move along the X-axis to a predetermined position; subsequently, the lifting column 31 and the cross beam 32 on the Y-axis truss 3 adjust the height, and the horizontal ram 34 on the cross beam 32 moves along the Y-axis guide rail 33 under the drive of the Y-axis motor to align the spindle tool head 43 with the machining point; then, the vertical ram 42 of the Z-axis spindle head 4 moves up and down on the Z-axis guide rail 41 to adjust the cutting depth of the spindle tool head 43; the spindle tool head 43 starts machining, and at the same time, the protective plate 12 blocks the flying of iron chips, and the chip conveyor 13 collects and discharges the iron chips; during the machining process, the height of the protective plate 12 can be adjusted as needed, the temperature can be controlled by using a cooling nozzle, and the machining efficiency can be improved through a quick tool change mechanism; the entire machining process is precisely coordinated by the control system for the movement of each axis to ensure the efficient, accurate and safe completion of the machining task of the front axle of the harvesting machine.

[0071] Although the present utility model has been described in detail by referring to the accompanying drawings and in conjunction with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and these modifications or substitutions should all be within the scope covered by the present utility model. / Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the said claims.

Claims

1. A three-axis gantry full-process machining center for the front axle of a harvesting machine, characterized in that: The invention comprises a machine tool frame (1) and a three-degree-of-freedom X-axis worktable (2), a Y-axis truss (3) and a Z-axis spindle head (4) arranged on the machine tool frame (1), and is used for machining the front axle of a harvesting machine, wherein: A machine tool frame (1) is used to support the entire machining center and is placed horizontally. A base (11) is provided at the bottom of the machine tool frame. A protective plate (12) and a chip conveyor (13) are provided on the side of the base (11). The protective plate (12) is used to prevent iron chips from being ejected to the outside of the machining center. The chip conveyor (13) is used to collect and discharge the iron chips. An X-axis workbench (2) is used to drive the front axle of the harvesting machine to move along the X-axis, which is parallel to the horizontal arrangement direction of the base (11), and includes a workbench (21), and the workbench (21) is connected to the X-axis motor on the base (11) through an X-axis lead screw (23); X-axis guide rails (22) are arranged on both sides of the X-axis lead screw (23), and the X-axis guide rails (22) are used to guide the X-axis lead screw (23); The Y-axis truss (3) is used for performing Y-axis movement relative to the X-axis workbench (2), and comprises a truss constructed by a lifting column (31) and a crossbeam (32). The bottom of the lifting column (31) is respectively controlled by a crossbeam head I (35) and a crossbeam head II (36) for lifting and lowering. The crossbeam (32) is provided with a Y-axis guide rail (33) and a horizontal slide (34). The horizontal slide (34) moves along the Y-axis guide rail (33) under the drive of the Y-axis motor, thereby performing Y-axis movement relative to the front axle of the harvesting machine. The Z-axis spindle head (4) is used for performing Z-axis motion relative to the X-axis worktable (2), and comprises a Z-axis guide rail (41) arranged on the horizontal slide (34), a vertical slide (42) being arranged on the Z-axis guide rail (41), and the vertical slide (42) performing Z-axis motion relative to the horizontal slide (34), thereby driving a spindle tool head (43) located on the vertical slide (42) to perform three-degree-of-freedom motion.

2. The three-axis gantry full-process machining center for the front axle of the harvesting machinery according to claim 1, characterized in that: The protective plate (12) of the machine tool frame (1) is a folding plate, which is used to adjust the height according to the degree of chip ejection.

3. The three-axis gantry full-process machining center for the front axle of the harvesting machinery according to claim 1 or 2, characterized in that: The chip conveyor (13) of the machine tool frame (1) adopts a spiral chip conveyor line to transport iron chips to one end of the machining center, where they are collected and discharged by a filter box on the water tank.

4. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as claimed in claim 3 is characterized in that: The machine tool frame (1) also includes a cantilever screen, which is rotatable 300 degrees relative to the base (11) and is equipped with a portable magnetic handheld unit box.

5. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as claimed in claim 1, characterized in that: A universal cooling nozzle is installed at the front end of the spindle cutter head (43) of the Z-axis spindle head (4), and the universal cooling nozzle is connected to a cooling water pump or a cooling fan for water cooling or air cooling the spindle cutter head (43); the cooling water pump is connected to a water tank, and the water tank is provided with a large-angle inclined surface to ensure that the coolant is quickly collected and circulated.

6. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as described in claim 1 or 5, characterized in that: The spindle cutter head (43) of the Z-axis spindle head (4) adopts a P4-level high-speed angular contact bearing, and the bearing adopts high-temperature grease to ensure that the rotation speed of the spindle cutter head (43) is 6000r / min.

7. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as claimed in claim 6, characterized in that: The Z-axis spindle head (4) also includes a pneumatic mechanism and a tool changing mechanism. The pneumatic mechanism includes an air source triplet and a pneumatic solenoid valve. The air source triplet filters the air source through an air filter and an oil mist separator to ensure that the air source used by the tool changing mechanism is dry and free of impurities. The pneumatic solenoid valve is used to quickly respond to the tool changing and air blowing actions of the machining center. The tool changing mechanism is a manipulator-type tool changing mechanism, and the tool changing time of tool to tool is 3.8 seconds, and it can accommodate several spindle tool heads (43).

8. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as claimed in claim 1, characterized in that: The X-axis workbench (2), the Y-axis truss (3) and the Z-axis spindle head (4) are all provided with brake mechanisms, which are respectively matched with the X-axis guide rail (22), the Y-axis guide rail (33) and the Z-axis guide rail (41) to timely lock the movement and prevent the danger of knife piercing after power failure.

9. The three-axis gantry full-process machining center for the front axle of the harvesting machinery as claimed in claim 1, characterized in that: The machine tool frame (1) is also provided with three power heads and three tool magazines, wherein: One power head is a vertical structure, with a tool magazine and a separate channel, which is used to process the gearbox connection surface of the pipe beam; The other two power heads are horizontal structures, respectively cooperating with two tool magazines and sharing one channel, and are used to symmetrically process both end faces of the pipe beam at the same time; By controlling the actions of the three power heads simultaneously, the connection position space of the side reduction assembly and the gearbox assembly can meet the requirements.

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