Gantry double-drive synchronous machine tool

Abstract

The utility model relates to the technical field of numerical control machine tools, and provides a gantry double-drive synchronous machine tool which comprises a machine tool body part, a cross beam assembly and a lead screw, the machine tool body part comprises a machine tool body, two guide rails and two support assemblies, the two guide rails are arranged at the two ends of the machine tool body in parallel, and the two support assemblies are located on the outer sides of the two guide rails respectively. Each support assembly comprises a front support and a rear support which are arranged in the extending direction of the guide rail. The two ends of the cross beam assembly are arranged on the two guide rails in a sliding mode, the cross beam assembly comprises a cross beam and nut bases located at the two ends of the cross beam, the cross beam and the nut bases are integrally formed, and nut base holes are formed in the nut bases; the lead screw is arranged in the nut seat hole in a penetrating mode, and the two ends of the lead screw are rotationally connected with the front support and the rear support respectively. According to the utility model, the cross beam and the nut seats on the two sides of the cross beam are integrated into an integral part, so that the steps and difficulty of field assembly are reduced, and the assembly precision and the assembly efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control machine tool technical field especially, relates to a double -drive synchronous machine tool of portal. BACKGROUND

[0002] With the development of modern manufacturing industry, numerical control machine tool is applied more and more widely, and the portal machine tool is widely used in the precision machining of large parts because of its stable structure and large machining range.In the design of traditional portal machine tool, the movement of crossbeam usually adopts single drive mode, that is, a single screw or hydraulic cylinder is used to drive the crossbeam to move along the guide rail.However, with the increasing requirements of machining precision and load capacity, the single drive mode gradually exposes limitations and cannot meet the higher standard machining requirements.Therefore, the portal machine tool with double-drive synchronous structure appears, which installs a screw on the left and right sides of the crossbeam respectively, and uses two motors to synchronously drive the two screws to drive the crossbeam to move stably and accurately.

[0003] However, in actual application, the portal machine tool with double-drive synchronous structure also faces a series of challenges.Especially in the assembly process, ensuring the assembly accuracy of the two screws becomes a key factor restricting the performance of the machine tool.Because the crossbeam, the left screw nut seat and the right screw nut seat are usually machined as three independent parts and then assembled on site, this assembly method has many shortcomings.Firstly, the assembly accuracy is difficult to guarantee.Because there may be slight size deviation in the machining process of the three parts, the mating surfaces of multiple parts need to be aligned and fixed during on-site assembly, which easily leads to error accumulation.Once the parallelism of the two screws in the vertical plane or the equal height in the horizontal plane cannot be accurately controlled, the crossbeam may be tilted, which seriously affects the machining precision and the overall performance of the machine tool.Secondly, the assembly efficiency is low.Because the debugging process of the screw nut seat is tedious and time-consuming, and the assembly of multiple parts requires a lot of manpower and time, the assembly cost is increased.

[0004] Therefore, how to improve the assembly efficiency while ensuring the assembly accuracy has become a technical problem to be solved for the portal machine tool with double-drive synchronous structure. UTILITY MODEL CONTENTS

[0005] The utility model provides a double -drive synchronous machine tool of portal to solve the problem of low assembly accuracy and low assembly efficiency of the existing portal machine tool with double-drive synchronous structure.

[0006] The utility model provides a double -drive synchronous machine tool of portal, comprising:

[0007] The bed body part comprises a bed body and two guide rails and two support assemblies arranged on the bed body, the two guide rails are arranged at two ends of the bed body in parallel, and the two support assemblies are respectively located outside the two guide rails, each of the support assemblies comprises a front support and a rear support arranged along the extension direction of the guide rail;

[0008] The cross beam assembly is slidably arranged on the two guide rails at two ends thereof and comprises a cross beam and a nut seat at two ends of the cross beam, the cross beam and the nut seat are integrally formed, and the nut seat is provided with a nut seat hole;

[0009] A lead screw is arranged in the nut seat hole and rotationally connected with the front support and the rear support at two ends thereof.

[0010] According to the gantry double-drive synchronous machine tool, the cross beam assembly comprises a first nut seat and a second nut seat at two ends of the cross beam, the first nut seat is provided with a first nut seat hole, the second nut seat is provided with a second nut seat hole, and the central axis of the first nut seat hole and the central axis of the second nut seat hole are parallel to each other.

[0011] According to the gantry double-drive synchronous machine tool, the central axis of the first nut seat hole and the central axis of the second nut seat hole are arranged in the height direction of the cross beam assembly.

[0012] According to the gantry double-drive synchronous machine tool, the front support is provided with a front support hole, the rear support is provided with a rear support hole, and the front support hole, the rear support hole and the nut seat hole are coaxially arranged.

[0013] According to the gantry double-drive synchronous machine tool, the nut seat is located between the front support and the rear support.

[0014] According to the gantry double-drive synchronous machine tool, bearings are arranged in the front support hole and the rear support hole, and two ends of the lead screw are rotationally connected with the front support and the rear support through the bearings.

[0015] According to the gantry double-drive synchronous machine tool, at least one sliding block is slidably arranged on each guide rail, and the sliding block is fixedly connected with the bottom of the cross beam assembly.

[0016] According to the gantry double-drive synchronous machine tool, the front support and the rear support are arranged on the bed body through adjusting fixing seats, and the positions and heights of the front support and the rear support are adjusted by adjusting the positions and heights of the adjusting fixing seats.

[0017] The gantry double-drive synchronous machine tool further comprises at least one driving mechanism, the driving mechanism drives the two lead screws to rotate synchronously to drive the cross beam assembly to move along the guide rail.

[0018] The gantry double-drive synchronous machine tool further comprises at least one driving mechanism, the driving mechanism drives the two lead screws to rotate synchronously to drive the cross beam assembly to move along the guide rail.

[0019] The above technical scheme of the gantry double-drive synchronous machine tool has the following beneficial effects:

[0020] The gantry double-drive synchronous machine tool has the following beneficial effects: the cross beam and the two nut seats on the two sides of the cross beam are machined into an integral component, thereby reducing the steps and difficulty of on-site assembly, improving the assembly efficiency, and ensuring the parallelism of the two nut seats with the cross beam reference surface, the parallelism of the two nut seats in the vertical plane and the equal height of the two nut seats in the horizontal plane, thereby ensuring the parallelism and equal height of the two lead screws and improving the assembly precision. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 The structure schematic view of the gantry double-drive synchronous machine tool provided by the embodiments of the present application is shown in the figure.

[0023] Figure 2 The structure schematic view of the cross beam assembly provided by the embodiments of the present application is shown in the figure.

[0024] Figure 3 The structure schematic view of the gantry double-drive synchronous machine tool provided by the embodiments of the present application is shown in the figure.

[0025] Figure 4 The side view of the gantry double-drive synchronous machine tool provided by the embodiments of the present application is shown in the figure.

[0026] Figure 5 The flow chart of the lead screw assembly method of the gantry double-drive synchronous machine tool provided by the embodiments of the present application is shown in the figure.

[0027] REFERENCE SIGNS:

[0028] 1, beam assembly; 2, screw rod; 3, bed; 4, guide rail; 5, front support; 6, rear support; 7, slider; 8, test bar; 101, cross beam; 102, first nut seat; 103, second nut seat; 1021, first nut seat hole; 1031, second nut seat hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Referring to Figure 1 and Figure 2 The present application provides a double-drive synchronous gantry machine tool, which comprises a bed component, a beam assembly 1 and a screw rod 2. The bed component comprises a bed 3 and two guide rails 4 and two support assemblies arranged on the bed 3. The two guide rails 4 are arranged in parallel at the two ends of the bed 3, and the two support assemblies are respectively located on the outer sides of the two guide rails 4. Each support assembly comprises a front support 5 and a rear support 6 arranged along the extension direction of the guide rail 4. The two ends of the beam assembly 1 are slidingly arranged on the two guide rails 4. The beam assembly 1 comprises a cross beam 101 and nut seats (a first nut seat 102 and a second nut seat 103) located at the two ends of the cross beam 101. The cross beam 101 and the nut seats are integrally formed to form a whole component. Each nut seat is provided with a nut seat hole, and the two screw rods 2 are respectively arranged in the two nut seat holes. The two ends of each screw rod 2 are respectively rotatably connected with a front support 5 and a rear support 6.

[0031] Specifically, the beam assembly 1 comprises a first nut seat 102 and a second nut seat 103 located at two ends of the beam 101 respectively, the first nut seat 102 is provided with a first nut seat hole 1021, the second nut seat 103 is provided with a second nut seat hole 1031, the central axis of the first nut seat hole 1021 and the central axis of the second nut seat hole 1031 are parallel to each other, and the central axis of the first nut seat hole 1021 and the central axis of the second nut seat hole 1031 are arranged at the same height in the height direction of the beam assembly 1. The beam 101 and the first nut seat 102 and the second nut seat 103 on both sides of the beam 101 are integrated into a whole component, so that the beam and the nut seat do not need to be assembled, the steps and difficulty of on-site assembly are reduced, and the assembly efficiency is improved. At the same time, the parallelism of the two nut seats and the beam reference surface, the parallelism of the two nut seats in the vertical plane and the equal height in the horizontal plane are ensured by the one-piece structure design, so that the parallelism and equal height of the two lead screws 2 are ensured, and the assembly precision is improved.

[0032] It should be noted that the beam assembly 1 can be made of high-precision machining equipment and technology to ensure that the size precision and shape tolerance of the whole beam assembly 1 meet the requirements.

[0033] The hole wall of the first nut seat hole 1021 and the second nut seat hole 1031 is provided with a thread, the first nut seat 102 is threadedly connected with one lead screw 2, and the second nut seat 103 is threadedly connected with another lead screw 2. Each nut seat is located between the front support 5 and the rear support 6 of a support assembly, the front support 5 is provided with a front support hole, the rear support 6 is provided with a rear support hole, and the front support hole, the rear support hole and the nut seat hole are coaxially arranged. Bearings are arranged in the front support hole and the rear support hole, and the two ends of the lead screw 2 are rotatably connected with the front support 5 and the rear support 6 through the bearings.

[0034] The gantry double-drive synchronous machine tool further comprises at least one driving mechanism. If one driving mechanism is used, the driving mechanism drives the two lead screws 2 to rotate synchronously to drive the beam assembly 1 to move along the guide rail 4. Of course, the two lead screws 2 can also be driven independently by two driving mechanisms, as long as the two driving mechanisms can keep synchronous driving.

[0035] Each guide rail 4 is provided with at least one sliding block 7 which is slidably arranged on the guide rail 4, and the sliding block 7 is fixedly connected with the bottom of the beam assembly 1. In order to ensure the stability of the structure, two or more than two sliding blocks 7 can be used to connect the bottom of the beam assembly 1 with each guide rail 4.

[0036] In one embodiment, the front support 5 and the rear support 6 are installed on the bed 3 through the adjusting fixing seat, and the position and height of the front support 5 or the rear support 6 are adjusted by adjusting the position and height of the adjusting fixing seat.

[0037] Of course, in other embodiments, the front support 5 and the rear support 6 can also be directly mounted on the bed body 3 through adjusting bolts, and the bed body 3 is provided with adjusting holes corresponding to the adjusting bolts, and the positions of the front support 5 or the rear support 6 are adjusted by adjusting the positions of the adjusting bolts in the adjusting holes, and the heights of the front support 5 or the rear support 6 are adjusted by adjusting the heights of the adjusting bolts protruding from the upper surface of the bed body 3.

[0038] Referring to Figures 3-5 The utility model also provides a screw rod assembly method of the double-drive gantry synchronous machine tool, comprising the following steps:

[0039] Step 1, the both ends of the cross beam assembly 1 are slidably arranged on the two guide rails 4.

[0040] Before step 1, the following step is further included: two parallel guide rails 4 are bolted on the bed body 3.

[0041] Specifically, step 1 comprises the following steps:

[0042] Step 101, at least one sliding block 7 is slidably mounted on each of the two guide rails 4.

[0043] Step 102, the sliding blocks 7 on the two guide rails 4 are fixedly mounted on the bottom of the both ends of the cross beam assembly 1, so as to realize the sliding connection between the cross beam assembly 1 and the guide rails 4.

[0044] Step 2, a feeler rod 8 is mounted at the position of the screw nut seat hole of the cross beam assembly 1.

[0045] Specifically, one feeler rod 8 is mounted in the screw nut seat hole of each of the two screw nut seats of the cross beam assembly 1.

[0046] Step 3, the support assembly is assembled on the outer side of each of the two guide rails 4.

[0047] Specifically, each support assembly comprises a front support 5 and a rear support 6 arranged along the extension direction of the guide rail 4, and the two support assemblies are respectively mounted on the bed body 3 outside the two guide rails 4 through fasteners.

[0048] Step 4, the positions and heights of the front support 5 and the rear support 6 are adjusted by using a dial gauge and the feeler rod 8.

[0049] Specifically, step 4 comprises the following steps:

[0050] Step 401, the universal table stand is fixed on the bed body 3 by the magnetic attraction of the magnetic base.

[0051] Specifically, the magnetic base of the universal table stand is placed on the bed body 3, the magnet switch of the magnetic base is turned on, and the universal table stand is adsorbed on the bed body 3 by the magnetic attraction of the magnetic base.

[0052] Step 402, contact the measuring head of the micrometer with the first end of the test bar 8.

[0053] After the fixing of the universal table stand is completed, the universal joint of the universal table stand is rotated, the measuring head of the micrometer is contacted with the first end of the test bar 8, and the micrometer pointer is rotated clockwise by a certain angle.

[0054] Step 403, push the cross beam assembly 1 to insert the test bar 8 into the front support 5.

[0055] Step 404, adjust the position and height of the front support 5 according to the change of the micrometer.

[0056] When the height of the front support 5 needs to be adjusted, the measuring head of the micrometer is contacted with the upper part of the first end of the test bar 8, and the micrometer pointer is rotated clockwise by a certain angle. After the test bar 8 is inserted into the front support 5, if the micrometer pointer rotates clockwise, it indicates that the axis of the test bar 8 is higher than the front support hole axis of the front support 5 at this time, and the position of the front support 5 is adjusted upward at this time to make the front support hole axis of the front support 5 and the axis of the test bar 8 in the same horizontal plane; if the micrometer pointer rotates counterclockwise, it indicates that the axis of the test bar 8 is lower than the front support hole axis of the front support 5 at this time, and the position of the front support 5 is adjusted downward at this time to make the front support hole axis of the front support 5 and the axis of the test bar 8 in the same horizontal plane.

[0057] When the position of the front support 5 needs to be adjusted, the measuring head of the micrometer is contacted with the side of the first end of the test bar 8, and the micrometer pointer is rotated clockwise by a certain angle. After the test bar 8 is inserted into the front support 5, if the micrometer pointer rotates clockwise, it indicates that the front support hole axis of the front support 5 deviates from the axis of the test bar 8 relative to the micrometer pointer at this time, and the position of the front support 5 is adjusted in the direction towards the micrometer pointer at this time to make the front support hole axis of the front support 5 and the axis of the test bar 8 in the same vertical plane; if the micrometer pointer rotates counterclockwise, it indicates that the front support hole axis of the front support 5 deviates towards the micrometer pointer relative to the axis of the test bar 8 at this time, and the position of the front support 5 is adjusted in the direction away from the micrometer pointer at this time to make the front support hole axis of the front support 5 and the axis of the test bar 8 in the same vertical plane.

[0058] After the position and height adjustment of the front support 5 is completed, the position and height of the rear support 6 are adjusted by using the micrometer and the test bar 8, and the specific steps are as follows:

[0059] Step 405, contact the measuring head of the micrometer with the second end of the test bar 8.

[0060] The contact method of the measuring head of the micrometer with the second end of the test bar 8 is similar to the contact method in step 402 described above, and will not be repeated here.

[0061] Step 406, push the cross beam assembly 1 to insert the test bar 8 into the rear support 6.

[0062] Step 407, adjust the position and height of the rear support 6 according to the change of the micrometer.

[0063] Wherein, when the height of the rear support 6 needs to be adjusted, the probe of the micrometer is contacted with the upper part of the second end of the test bar 8, and the pointer of the micrometer is rotated clockwise by a certain angle. After the test bar 8 is inserted into the rear support 6, if the pointer of the micrometer rotates clockwise, it indicates that the axis of the test bar 8 is higher than the axis of the rear support hole of the rear support 6 at this time, and the position of the rear support 6 is adjusted upward at this time to make the axis of the rear support hole of the rear support 6 and the axis of the test bar 8 in the same horizontal plane; if the pointer of the micrometer rotates counterclockwise, it indicates that the axis of the test bar 8 is lower than the axis of the rear support hole of the rear support 6 at this time, and the position of the rear support 6 is adjusted downward at this time to make the axis of the rear support hole of the rear support 6 and the axis of the test bar 8 in the same horizontal plane.

[0064] When the position of the rear support 6 needs to be adjusted, the probe of the micrometer is contacted with the side of the second end of the test bar 8, and the pointer of the micrometer is rotated clockwise by a certain angle. After the test bar 8 is inserted into the rear support 6, if the pointer of the micrometer rotates clockwise, it indicates that the axis of the rear support hole of the rear support 6 deviates from the pointer of the micrometer relative to the axis of the test bar 8 at this time, and the position of the rear support 6 is adjusted in the direction towards the pointer of the micrometer at this time to make the axis of the rear support hole of the rear support 6 and the axis of the test bar 8 in the same vertical plane; if the pointer of the micrometer rotates counterclockwise, it indicates that the axis of the rear support hole of the rear support 6 deviates towards the pointer of the micrometer relative to the axis of the test bar 8 at this time, and the position of the rear support 6 is adjusted in the direction away from the pointer of the micrometer at this time to make the axis of the rear support hole of the rear support 6 and the axis of the test bar 8 in the same vertical plane.

[0065] It can be understood that the height adjustment of the front support 5 and the rear support 6 refers to the displacement in the vertical direction, and the position adjustment of the front support 5 and the rear support 6 refers to the displacement in the horizontal direction.

[0066] It should be noted that, in the process of adjusting the position and height of the front support 5, the probes of the two micrometers are contacted with the first ends of the two test bars 8 respectively, and then the cross beam assembly 1 is pushed to make the two test bars 8 inserted into the two front supports 5 at the same time, so as to realize the adjustment of the coaxiality of the two nut seats and the corresponding front supports 5 at the same time. Similarly, in the process of adjusting the position and height of the rear support 6, the probes of the two micrometers are contacted with the second ends of the two test bars 8 respectively, and then the cross beam assembly 1 is pushed to make the two test bars 8 inserted into the two rear supports 6 at the same time, so as to realize the adjustment of the coaxiality of the two nut seats and the corresponding rear supports 6 at the same time, thereby the debugging time can be significantly shortened and the assembly efficiency is improved.

[0067] After the position and height adjustment of the two front supports 5 and the two rear supports 6 are completed, the following steps are further included:

[0068] Step 5, remove the test rod 8, and connect the lead screw with the front support 5, the nut seat and the rear support 6 respectively.

[0069] The lead screw assembly method of the gantry double-drive synchronous machine tool has the advantages that the cross beam assembly is integrally formed, the cross beam and the nut seats on both sides of the cross beam do not need to be assembled separately, and the nut seat position does not need to be debugged, the integrated design reduces error accumulation and the steps and difficulty of on-site assembly, improves the stability and reliability of the mechanical structure, and improves the assembly efficiency; at the same time, the parallelism of the two nut seats and the cross beam reference surface, and the parallelism of the two nut seats in the vertical plane and the equal height in the horizontal plane are ensured, so that the parallelism and equal height of the two lead screws are ensured, and the assembly precision is improved. The utility model also simultaneously adjusts the coaxiality of the two nut seats and the corresponding front and rear supports by using two test rods, reduces the on-site worker debugging difficulty, significantly shortens the debugging time, improves the assembly adjustment efficiency, reduces the repair frequency, reduces the operation difficulty for subsequent maintenance.

[0070] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A gantry double-drive synchronous machine tool, characterized in that, include: The bed frame component includes a bed frame and two guide rails and two support assemblies disposed on the bed frame. The two guide rails are disposed parallel to each other at both ends of the bed frame. The two support assemblies are respectively located on the outer sides of the two guide rails. Each support assembly includes a front support and a rear support arranged along the extension direction of the guide rail. A crossbeam assembly, wherein the two ends of the crossbeam assembly are slidably disposed on the two guide rails, including a crossbeam and a nut seat located at both ends of the crossbeam, the crossbeam and the nut seat are integrally formed, and the nut seat is provided with a nut seat hole; A lead screw is inserted into the hole of the lead screw seat, and the two ends of the lead screw are rotatably connected to the front support and the rear support, respectively.

2. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, The crossbeam assembly includes a first wire female seat and a second wire female seat located at both ends of the crossbeam. The first wire female seat has a first wire female seat hole, and the second wire female seat has a second wire female seat hole. The central axis of the first wire female seat hole and the central axis of the second wire female seat hole are parallel to each other.

3. The gantry double-drive synchronous machine tool according to claim 2, characterized in that, The central axis of the first wire female seat hole and the central axis of the second wire female seat hole are set at the same height in the height direction of the beam assembly.

4. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, The front support is provided with a front support hole, and the rear support is provided with a rear support hole. The front support hole, the rear support hole, and the nut seat hole are coaxially arranged.

5. The gantry double-drive synchronous machine tool according to claim 4, characterized in that, The nut is located between the front support and the rear support.

6. The gantry double-drive synchronous machine tool according to claim 5, characterized in that, Bearings are provided in both the front support hole and the rear support hole, and the two ends of the lead screw are rotatably connected to the front support and the rear support respectively through the bearings.

7. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, At least one slider is slidably disposed on each of the guide rails, and the slider is fixedly connected to the bottom of the beam assembly.

8. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, Both the front support and the rear support are mounted on the bed via adjusting brackets. The position and height of the front support or the rear support can be adjusted by adjusting the position and height of the adjusting brackets.

9. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, It also includes at least one drive mechanism, which drives the two lead screws to rotate synchronously to move the crossbeam assembly along the guide rail.

10. The gantry double-drive synchronous machine tool according to claim 1, characterized in that, The hole wall of the nut seat is threaded, and the nut seat is threadedly connected to the lead screw.

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