Machine tool

Abstract

The utility model provides a machine tool which comprises a base, the base is provided with a bottom face, a top face and a side vertical face located between the top face and the bottom face, and the side vertical face is provided with an assembly matching face and a non-assembly matching face. A plurality of open slots which extend up and down and penetrate to the top surface and the bottom surface are formed in the non-assembly matching surface, and the open slots are arranged at intervals in the direction surrounding the height of the base. According to the utility model, the plurality of open slots vertically extending up and down are arranged on the non-assembly matching surface on the side vertical surface of the base, so that the inner and outer sides of the edge area of the machine tool base are uniformly radiated in the casting process, and the residual stress increase caused by overlarge temperature difference between the inner and outer sides of a casting is reduced; the machine tool base can be effectively prevented from deforming in the operation process, and the machining accuracy of a machine tool is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to machine tool design technical field, concretely relates to a machine tool. BACKGROUND

[0002] The machine tool stability not only directly influences processing quality and production efficiency, but also relates to the service life, operation safety and energy consumption of the machine tool, and improving the machine tool stability is one of important means for enterprises to improve the overall competitiveness. The stable machine tool can ensure that the relative position between the tool and the workpiece remains unchanged during the processing process, reduces the error caused by vibration, makes the processing surface more smooth and flat, improves the processing precision, reduces the scrap rate, improves the production qualified rate, and achieves the purpose of improving the overall production efficiency, so it is necessary to improve the overall stability of the machine tool from multiple dimensions.

[0003] At present, the means for improving the stability of the machine tool generally adopts increasing the support plate around the column, the counterweight base and adding damping material to increase the stability of the machine tool, but often only considers a single part or a single damping method, and the effect of improving the stability of the machine tool is not obvious.

[0004] The method for improving the stability of the machine tool by increasing the support plate and other multiple structure joint means needs to use punching and bolts to connect and fix between the components, which will change the structure of the parts, reduce the mechanical properties of the parts, and affect the overall life of the machine tool. In the long-term operation process of the machine tool, the failure of a single part will also affect the operation of the machine tool and reduce the work efficiency, which brings inconvenience to the production.

[0005] At present, the method for improving the stability of the machine tool is concentrated on increasing the support plate around the column to increase the contact area between the column and the base, thereby improving the stability of the machine tool, but the coordinated work of multiple parts will increase the interaction and cause the deformation of the machine tool structure. It is difficult to ensure the long-term effective and stable operation of the machine tool and reduce the production efficiency. For example, the utility model patent with the announcement number CN207696060U discloses a high-stability reinforced machine tool column, the lower end of the column body is provided with a reinforcing rod, the reinforcing rod and the column body are fixedly connected through the stud, one side of the column body is provided with a reinforcing strip, the reinforcing strip and the column body are fixedly connected through the fixing piece, the connection between the column outer body and the base is connected through the bolts for many times, the quality of the machine tool itself and the load generated in the processing process are easy to cause the bolt connection to be effective, at the same time, it also causes the vibration to increase, the overall rigidity of the machine tool decreases, the stability of the machine tool decreases, and in serious cases, the workpiece processing fails.

[0006] The utility model discloses a numerical control machine tool base integrated casting structure, and the base of the method is integrated casting, which solves the technical problems of the prior art, such as loose machine tool structure, poor shock absorption and rigidity of the machine base, and the connection between components through separate bolt connection and welding. Utility model content

[0007] Therefore, the utility model provides a machine tool, which can overcome the technical problems of the prior art, such as the flat structure of the outer side of the machine tool, the large temperature difference between the inner side and the outer side during the casting cooling process, excessive residual stress, deformation of the base, and the influence of the stability of the machine tool.

[0008] To solve the above problems, the utility model provides a machine tool, which comprises a base, the base has a bottom surface, a top surface and a side surface between the top surface and the bottom surface, the side surface has an assembly matching surface and a non-assembly matching surface, a plurality of open grooves extending upward and downward and penetrating through the top surface and the bottom surface are formed on the non-assembly matching surface, and the plurality of open grooves are arranged at intervals along the direction surrounding the height of the base.

[0009] In some embodiments, a draft angle is formed at the connection position of the groove vertical wall and the groove bottom wall of each open groove.

[0010] In some embodiments, a plurality of first sand filling holes are formed on the bottom surface, and the first sand filling holes are used for filling counterweight sand.

[0011] In some embodiments, a plurality of boss foot pads are arranged on the bottom surface, each adjacent two boss foot pads have a mounting groove, and a support foot is detachably assembled in each mounting groove.

[0012] In some embodiments, a door bridge is assembled on the top surface, and the door bridge is integrally cast.

[0013] In some embodiments, the door bridge comprises a cross beam and a column at each end of the length of the cross beam, the column has a first hollow area, the first hollow area has a plurality of first rib plates and second rib plates, the first rib plates are arranged in the vertical direction, the second rib plates are arranged in the horizontal direction, and the first rib plates and the second rib plates are arranged in a horizontal and vertical cross manner; and / or, the cross beam has a second hollow area, and the second hollow area has a plurality of third rib plates arranged at intervals along the length of the cross beam.

[0014] In some embodiments, a second sand filling hole is formed on the cross beam, the second sand filling hole being at least partially communicated with the second hollow region, and the second sand filling hole being used for filling counterweight sand; and / or, a third sand filling hole is formed on the upright column, the third sand filling hole being at least partially communicated with the first hollow region, and the third sand filling hole being used for filling counterweight sand.

[0015] In some embodiments, a damping device is further arranged in the door bridge, the damping device comprising a counterweight ball and at least three connecting ropes for suspending the counterweight ball on the door bridge, each of the connecting ropes being in the same vertical plane as the center of mass of the counterweight ball, and each of the connecting ropes being arranged along the length direction of the cross beam in sequence in the vertical plane; and / or, the cross beam is arranged perpendicularly to the upright column, and a fourth rib plate is arranged in the right angle space formed by the connection between the cross beam and the upright column, and the fourth rib plate is supported between the cross beam and the upright column.

[0016] In some embodiments, two parallel and spaced guide rail mounting platforms are formed on the top surface of the cross beam, the two guide rail mounting platforms extending along the length direction of the cross beam, and a grating ruler mounting platform is further formed on the top surface of the cross beam, the grating ruler mounting platform being on the side of one of the guide rail mounting platforms away from the other guide rail mounting platform.

[0017] In some embodiments, the grating ruler mounting platform protrudes from one side edge of the cross beam in the horizontal direction, and a fifth rib plate is arranged between the outer side surface of the cross beam and the bottom side surface of the grating ruler mounting platform.

[0018] The machine tool provided by the utility model has the following beneficial effects:

[0019] By arranging a plurality of vertically upward and downward extending opening grooves on the non-assembly matching surface of the side vertical surface of the base, the heat dissipation of the edge region of the machine tool base can be uniform on the inside and outside during the casting process, the residual stress increase caused by the too large temperature difference between the inside and outside of the casting (i.e., compared with the prior art, the residual stress is reduced) is reduced, the deformation of the machine tool base during the running process can be effectively prevented, and the machining accuracy of the machine tool is ensured.

[0020] The aforementioned opening grooves in the utility model extend through the top surface and the bottom surface of the base in the vertical direction, on the one hand, the base can be smoothly demolded after the casting is completed, and on the other hand, the deformation of the top surface caused by the residual prestress can be prevented, and the position accuracy of the components installed thereon is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced. The drawings in the following description are merely exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0022] Figure 1 is the overall structure schematic diagram of the machine tool in the embodiment of the present application (the linear driving motor between the door bridge top surface and the slide bottom surface is not shown);

[0023] Figure 2 is Figure 1 the bottom view of the base in

[0024] Figure 3 is Figure 2 the local enlarged view of A in

[0025] Figure 4 is Figure 2 the left view of

[0026] Figure 5 is Figure 2 the top view of

[0027] Figure 6 is Figure 1 the left view of the door bridge in

[0028] Figure 7 is Figure 6 the sectional view of A-A in

[0029] Figure 8 is Figure 6 the left view of the door bridge in

[0030] Figure 9 is Figure 6 the top view of the door bridge in

[0031] Figure 10 is Figure 9 the sectional view of B-B in

[0032] The reference signs are:

[0033] 1, base; 11, assembly mating surface; 12, non-assembly mating surface; 121, open slot; 13, first sand filling hole; 141, boss foot pad; 142, mounting groove; 143, foot; 2, door bridge; 21, cross beam; 211, third rib plate; 212, second sand filling hole; 22, stand column; 221, first rib plate; 222, second rib plate; 223, third sand filling hole; 231, counterweight ball; 232, connecting rope; 24, fourth rib plate; 25, guide rail mounting platform; 26, grating ruler mounting platform; 27, fifth rib plate; 3, workbench; 4, grating ruler; 5, sliding seat; 6, main shaft box. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0036] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90° or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0037] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the limitation of the scope of protection of the utility model.

[0038] Referring to Figures 1 to 10 As shown in the figure, according to the embodiment of the utility model, a machine tool is provided, including base 1, the base 1 has bottom surface (not marked in the figure) and top surface (not marked in the figure) and side vertical surface (not marked in the figure) between the top surface and the bottom surface, the top surface is assembled with door bridge 2 and assembled with workbench 3, the door bridge 2 is connected with slide 5 through linear motor and slides, the slide 5 is assembled with spindle box 6, and the machining tool is specifically assembled on the spindle box 6, the side vertical surface has assembly matching surface 11 and non-assembly matching surface 12, the assembly matching surface 11 is used to assemble with corresponding parts, such as chip removal motor seat (chip removal motor is assembled in it) and the like, a plurality of upper and lower extending and penetrating to the top surface and bottom surface opening grooves 121 are formed on the non-assembly matching surface 12, that is, each opening groove 121 extends up and down along the vertical direction, a plurality of opening grooves 121 are arranged along the direction of surrounding the height of the base 1, it can be understood that the corresponding adjacent two opening grooves 121 will correspond to form the corresponding boss.

[0039] In the technical scheme, the plurality of vertically upward and downward extending open grooves 121 arranged on the non-fitting surface 12 of the side vertical surface of the base 1 can make the edge area of the machine tool base uniformly radiate heat from the inside and outside during casting, reduce the increase of residual stress caused by too large temperature difference between the inside and outside of the casting (i.e. reduce the residual stress compared with the prior art), effectively prevent the deformation of the machine tool base during operation, and ensure the machining accuracy of the machine tool. Meanwhile, it is worth emphasizing that the aforementioned open grooves 121 extend through the top surface and the bottom surface of the base 1 in the vertical direction, which can facilitate the smooth demolding of the base 1 after casting, and prevent the deformation of the top surface caused by residual stress, thereby ensuring the positional accuracy of the components (such as the workbench 3) installed thereon.

[0040] In some embodiments, the connection position of the groove vertical wall (not labeled in the figure) and the groove bottom wall (not labeled in the figure) of each open groove 121 is formed with a draft angle (not labeled in the figure), so that the cross section of each open groove 121 is isosceles trapezoidal. By arranging the aforementioned draft angle, the smooth demolding of the base 1 after casting is further ensured. The aforementioned draft angle can generally be 30° to 60°, which can be reasonably selected according to actual needs.

[0041] It can be understood that the specific values of the groove depth and the groove width of each open groove 121 are reasonably determined according to the material of the base 1 and the casting process.

[0042] In some embodiments, a plurality of first sand filling holes 13 are formed on the bottom surface, and the first sand filling holes 13 are used to fill counterweight sand, and the aforementioned counterweight sand can be casting sand.

[0043] In the technical scheme, the first sand filling holes 13 are constructed on the bottom surface of the base 1, so that the counterweight sand can be filled into the first sand filling holes 13 to increase the weight of the machine tool base 1, improve the anti-shock ability, and further increase the stability of the machine tool.

[0044] In some embodiments, a plurality of boss foot pads 141 are provided on the bottom surface, and each adjacent two boss foot pads 141 have a mounting groove 142, and each mounting groove 142 is detachably assembled with a foot 143. The aforementioned boss foot pad 141 is integrally cast with the base 1, and the foot 143 is a structure assembled with the base 1, which increases the diversity of the foot, can realize various foot modes, expands the application range of the machine tool, and meets various foot installation environments, such as fixing the foot bolt on the ground, embedding the foot bolt in the ground and directly fixing the foot pad to the ground, etc.

[0045] In some embodiments, a door bridge 2 is assembled on the top surface, and the door bridge 2 is integrally cast.

[0046] In the technical scheme, the door bridge 2 is integrally formed by casting, which can reduce the number of components of the door bridge 2, thereby improving the assembly efficiency, and greatly improving the overall rigidity and stability of the door bridge 2.

[0047] In some embodiments, the door bridge 2 includes a cross beam 21 and a stand 22 at both ends of the cross beam 21, respectively, the stand 22 has a first hollow area, the first hollow area has a plurality of first and second rib plates 221 and 222, the first rib plates 221 are arranged in the vertical direction, the second rib plates 222 are arranged in the horizontal direction, and the first rib plates 221 and the second rib plates 222 are arranged in a horizontal and vertical cross manner; and / or, the cross beam 21 has a second hollow area, and the second hollow area is provided with a plurality of third rib plates 211 arranged along the length direction of the cross beam 21.

[0048] In the technical scheme, the first, second and third rib plates 221, 222 and 211 are arranged, which can further improve the overall rigidity and stability of the integrated door bridge 2.

[0049] In some embodiments, the cross beam 21 is formed with a second sand filling hole 212, the second sand filling hole 212 is at least partially communicated with the second hollow area, and the second sand filling hole 212 is used for filling counterweight sand; and / or, the stand 22 is formed with a third sand filling hole 223, the third sand filling hole 223 is at least partially communicated with the first hollow area, and the third sand filling hole 223 is used for filling counterweight sand.

[0050] In the technical scheme, the second and third sand filling holes 212 and 223 are arranged on the cross beam 21 and the stand 22, respectively, and the counterweight sand is filled in the corresponding sand filling holes, which further improves the overall weight of the machine tool, improves the anti-shock ability of the machine tool, and increases the stability of the machine tool.

[0051] In some embodiments, the door bridge 2 (an area without rib plates) is also provided with a damping device (not labeled in the figure), the damping device includes a counterweight ball 231 and at least three connecting ropes 232 for suspending the counterweight ball 231 on the door bridge 2, each connecting rope 232 and the center of mass of the counterweight ball 231 are in the same vertical plane, and each connecting rope 232 is arranged along the length direction of the cross beam 21 in the vertical plane.

[0052] In the technical scheme, the damping device arranged above the integrated door bridge 2 can reduce the shaking of the machine tool during work, and further improve the stability and processing accuracy of the machine tool.

[0053] The fourth rib plate 24 is arranged in the right angle space formed by the connection of the cross beam 21 and the column 22, and is supported between the cross beam 21 and the column 22, so as to improve the structural stability of the cross beam 21 and the column 22.

[0054] In some embodiments, two parallel and spaced guide rail mounting platforms 25 are formed on the top surface of the cross beam 21, and extend along the length direction of the cross beam 21; and a grating ruler mounting platform 26 is further formed on the top surface of the cross beam 21, and is located on the side of one of the guide rail mounting platforms 25 away from the other guide rail mounting platform 25; the guide rail mounting platform 25 is matched with the corresponding component of the linear motor; and the grating ruler mounting platform 26 is used for mounting the grating ruler 4 in full plane fitting mode.

[0055] In the technical scheme, the grating ruler mounting platform 26 is located in the outer side area of the guide rail mounting platform 25, so that the grating ruler 4 is located away from the middle area of the door bridge 2 after installation, and the location makes the grating ruler 4 not easy to be polluted by oil mist, prolongs the service life and running stability, and the reading head of the grating ruler 4 has sufficient space, so that the installation and correction process is more convenient.

[0056] In some embodiments, the grating ruler mounting platform 26 protrudes from one side edge of the cross beam 21 in the horizontal direction, and a fifth rib plate 27 is arranged between the outer side surface of the cross beam 21 and the bottom side surface of the grating ruler mounting platform 26; the fifth rib plate 27 is provided in plurality, and the plurality of fifth rib plates 27 are arranged in the length direction of the cross beam 21, so as to reliably support the grating ruler mounting platform 26 and ensure the installation accuracy of the grating ruler 4.

[0057] It is easy for those skilled in the art to understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0058] The above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above description is only the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A machine tool, characterized by The base (1) has a bottom surface and a top surface, and a side surface between the top surface and the bottom surface, the side surface has a fitting surface (11) and a non-fitting surface (12), a plurality of open grooves (121) are formed on the non-fitting surface (12) and extend upward and downward to the top surface and the bottom surface, and the plurality of open grooves (121) are arranged at intervals along the height of the base (1).

2. Machine tool according to claim 1, characterized in that The connection position of the groove vertical wall and the groove bottom wall of each open groove (121) is formed with a draft angle.

3. The machine tool according to claim 1, characterized in that A plurality of first sand filling holes (13) are formed on the bottom surface, and the first sand filling holes (13) are used to fill counterweight sand.

4. The machine tool according to claim 1, characterized in that A plurality of boss foot pads (141) are arranged on the bottom surface, and each two adjacent boss foot pads (141) have a mounting groove (142) therebetween, and a support foot (143) is detachably assembled in each mounting groove (142).

5. The machine tool according to claim 1, characterized in that, A door bridge (2) is assembled on the top surface, and the door bridge (2) is integrally formed by casting.

6. The machine tool according to claim 5, characterized in that The door bridge (2) includes a cross beam (21) and a column (22) at each end of the length of the cross beam (21), the column (22) has a first hollow area, the first hollow area has a plurality of first rib plates (221) and second rib plates (222), the first rib plates (221) are arranged in the vertical direction, the second rib plates (222) are arranged in the horizontal direction, and the first rib plates (221) and the second rib plates (222) are arranged in a horizontal-vertical cross manner; and / or, the cross beam (21) has a second hollow area, and the second hollow area is provided with a plurality of third rib plates (211) arranged at intervals along the length of the cross beam (21).

7. The machine tool according to claim 6, characterized in that A second sand filling hole (212) is formed on the cross beam (21), the second sand filling hole (212) at least partially communicates with the second hollow area, and the second sand filling hole (212) is used to fill counterweight sand; and / or, a third sand filling hole (223) is formed on the column (22), the third sand filling hole (223) at least partially communicates with the first hollow area, and the third sand filling hole (223) is used to fill counterweight sand.

8. The machine tool according to claim 6, characterized in that The door bridge (2) further comprises a damping device, the damping device includes a counterweight ball (231) and at least three connecting ropes (232) for suspending the counterweight ball (231) on the door bridge (2), each connecting rope (232) and the center of mass of the counterweight ball (231) are in the same vertical plane, and each connecting rope (232) is arranged in the length direction of the cross beam (21) in the vertical plane; and / or, the cross beam (21) and the column (22) are arranged perpendicularly, a fourth rib plate (24) is arranged in the right angle space formed by the connection of the cross beam (21) and the column (22), and the fourth rib plate (24) is supported between the cross beam (21) and the column (22).

9. The machine tool according to claim 6, characterized in that The top surface of the crossbeam (21) is formed with two parallel and spaced guide rail installation platforms (25), which extend along the length direction of the crossbeam (21), and is also formed with a grating ruler installation platform (26) on the side away from one of the guide rail installation platforms (25).

10. Machine tool according to claim 9, characterized in that The grating ruler installation platform (26) protrudes from one side edge of the crossbeam (21) in the horizontal direction, and the fifth rib plate (27) is arranged between the outer side surface of the crossbeam (21) and the bottom side surface of the grating ruler installation platform (26).

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