CN214979214U

CN214979214U - Spliced lathe bed of gantry machining center

Info

Publication number: CN214979214U
Application number: CN202120844517.4U
Authority: CN
Inventors: 顾立柱
Original assignee: Anhui Pengrui Intelligent Technology Co ltd
Current assignee: Anhui Pengrui Intelligent Technology Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-03
Anticipated expiration: 2031-04-21

Abstract

The utility model discloses a longmen machining center's concatenation formula lathe bed belongs to planer-type milling machine technical field. The utility model discloses a public lathe bed and concatenation lathe bed link to each other through the connecting screw between public lathe bed and the concatenation lathe bed, the keyway has all been seted up to the corresponding position of both sides wall of the concatenation department faying face of public lathe bed and concatenation lathe bed, and the keyway extends along the width direction of lathe bed, and two keyway in-connections have the feather key combination that is used for adjusting concatenation lathe bed high position. The utility model aims to overcome the problem that the coplanarity of concatenation lathe bed guide surface is hardly guaranteed in the connection of current longmen machining center lathe bed concatenation department, provide a longmen machining center's concatenation formula lathe bed, not only reduced the casting processing degree of difficulty of lathe bed, can also guarantee the coplanarity and the assembly precision of concatenation lathe bed guide surface.

Description

Spliced lathe bed of gantry machining center

Technical Field

The utility model relates to a longmen milling machine technical field, more specifically say, relate to a longmen machining center's concatenation formula lathe bed.

Background

The length of the large gantry machining center lathe bed reaches tens of meters, and the existing large gantry machining center lathe bed in China at present generally adopts an integral pouring mode, so that the casting difficulty, the machining difficulty and the transportation difficulty are high. Even if the machine tool body is a spliced machine tool body with the length of more than ten meters, the coplanarity of the guide surface of the spliced machine tool body is difficult to ensure by the connection of spliced positions, so that the problems of how to splice the machine tool body of the gantry machining center and how to ensure the coplanarity of the guide surface after connection are urgently needed to be solved in the industry.

Through retrieval, a large number of patents have been published on the spliced bed body structure of the gantry machining center, such as the Chinese patent application number: 2009201576978, the name of invention creation is: the utility model provides a large-scale longmen lathe bed structure of deciding of cordwood system concatenation, this application discloses a large-scale longmen lathe bed structure of deciding of cordwood system concatenation, including at least three sections lathe beds, the lathe bed passes through rag bolt and reliably fixes with ground, leave 8 ~ 12 mm's clearance between two adjacent lathe beds, the tip upper surface of two adjacent lathe beds is equipped with the recess, the upper end connecting plate is put into the recess and is fixed by connecting screw, the tip side of two adjacent lathe beds is protruding to be equipped with and is exposed the gusset perpendicular with the lathe bed, two adjacent gusset that expose pass through connecting bolt and fix.

Also as in chinese patent application No.: 2015103808240, the name of invention creation is: the application discloses a long-stroke spliced lathe bed adopting a glue filling connection structure and a splicing method. The inclined rib plate and the side wall plate of the lathe bed form an equilateral triangle stable structure, and the cross rib plate is combined, so that the lathe bed has good static characteristics; the joint surfaces of two adjacent bed bodies adopt a glue pouring connection structure, so that the contact area of the joint surfaces is increased, the overall dynamic characteristic of the bed body is improved, the verticality requirements of the outer side surfaces of the two end plates and the guide rail are reduced, the processing difficulty is reduced, and the assembly precision is ensured. The machine body is mainly used for a splicing machine body structure for ensuring the rigidity and the assembly precision of the machine body in a fixed beam movable column type aluminum material gantry machining center.

The two schemes are good exploration for the spliced lathe bed structure of the gantry machining center, but still have space for further improvement, and research on the spliced lathe bed structure of the gantry machining center in the industry never stops.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the problem that the coplanarity of concatenation lathe bed guide surface is hardly guaranteed in the connection of current longmen machining center lathe bed concatenation department, provide a longmen machining center's concatenation formula lathe bed, not only reduced the casting processing degree of difficulty of lathe bed, can also guarantee the coplanarity and the assembly precision of concatenation lathe bed guide surface.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a longmen machining center's concatenation formula lathe bed, including public lathe bed and concatenation lathe bed, link to each other through connecting screw between public lathe bed and the concatenation lathe bed, the keyway has all been seted up to the corresponding position of both sides wall of the concatenation department faying face of public lathe bed and concatenation lathe bed, and the keyway extends along the width direction of lathe bed, and two keyway in-connections have the feather key combination that is used for adjusting concatenation lathe bed high position.

As a further improvement, the key groove has been all seted up to the width center corresponding position of the concatenation department faying face of public lathe bed and concatenation lathe bed, and the keyway extends along the direction of height of lathe bed, and two keyway in-connections have the feather key combination that is used for adjusting concatenation lathe bed horizontal position.

As the utility model discloses further improvement, the feather key combination is including setting up the mounting in public lathe bed keyway, and the mounting includes the section of accepting in this keyway of embedding, and one side central point that the section of accepting was kept away from public lathe bed puts and is provided with the cooperation section, and the upper and lower both sides face of cooperation section is the inclined plane that the symmetry set up, and two upper and lower inclined planes departments of cooperation section all are provided with the matched with regulating part, in the joint lathe bed keyway of embedding jointly behind regulating part and the combination of cooperation section.

As a further improvement, the outside of mounting and regulating part is connected with the connecting piece, and the connecting piece includes the linkage segment, and the inboard of linkage segment is provided with and is used for leaning on the section of leaning on by of mounting outside terminal surface.

As a further improvement, the connecting holes are formed in the corresponding positions of the connecting piece and the fixing piece, and the connecting screw rod sequentially passes through the connecting holes in the connecting piece and the fixing piece to fix the connecting piece on the fixing piece.

As a further improvement, the adjusting holes have been all opened to the corresponding position of connecting piece and regulating part, and adjusting screw passes the adjusting hole on connecting piece and the regulating part in proper order and links together connecting piece and regulating part.

As a further improvement, the joint surface of the joint of the common lathe bed and the joint lathe bed is respectively a common mounting surface and a joint mounting surface, a sealing groove is arranged on the joint mounting surface, and a sealing ring is arranged in the sealing groove.

As a further improvement, the oil blocking grooves are formed in both sides of the width direction of the common bed body and the width direction of the splicing part of the splicing bed body.

As a further improvement, the utility model discloses be provided with more than a set of stand stationary plane on the public lathe bed, and be provided with more than a set of bearing frame stationary plane on the public lathe bed, the quantity of stand stationary plane keeps unanimous with the quantity of bearing frame stationary plane.

As a further improvement, the key groove is a U-shaped groove, and the height of the bearing section is matched with the size of the U-shaped opening of the key groove.

As a further improvement, the width of the regulating part and the width of the matching section are consistent with the width of the bearing section, and the width of the bearing section is the same as the width of the key groove.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a concatenation formula lathe bed of longmen machining center adopts the public lathe bed of the same size and the concatenation lathe bed of not unidimensional can splice out the longmen machining center lathe bed of required different length, realizes the concatenation use of different length lathe beds, reduces the length of single-section lathe bed, does benefit to casting and transportation; meanwhile, the common bed body is used as a universal material, so that the stock is facilitated, and the production cost is reduced.

(2) The utility model discloses a longmen machining center's concatenation formula lathe bed, public lathe bed and concatenation lathe bed junction adopt the structure of feather key combination to install and adjust, height and side face of leaning on are aequilate such as easy to assemble debugging lathe bed line rail installation bottom surface, horizontal position about the feather key combination of centre is used for adjusting, and the feather key combination of both sides wall is used for adjusting high position from top to bottom.

(3) The utility model discloses a longmen machining center's concatenation formula lathe bed, the inclined plane that the upper and lower both sides face of cooperation section set up for the symmetry, and two upper and lower inclined planes departments of cooperation section all are provided with the matched with regulating part, and in the joint lathe bed keyway of embedding jointly behind regulating part and the combination of cooperation section, the slope integrated design of regulating part and cooperation section can reduce the atress of connecting screw, keeps the permanent stability between public lathe bed and the joint lathe bed faying face.

(4) The utility model discloses a longmen machining center's concatenation formula lathe bed has seted up the seal groove on the concatenation installation face, is provided with the sealing washer in the seal groove, can effectively improve the sealing performance of faying face, guarantees the stability of concatenation department faying face, further provides the guarantee for follow-up machining precision.

(5) The utility model discloses a longmen machining center's concatenation formula lathe bed, public lathe bed and concatenation lathe bed all have seted up the width direction both sides that are close to concatenation department and have kept off oily slot, keep off oily slot can not only prevent effectively that profit from permeating the faying face in the oil drainage ditch on leading-in the lathe bed of lubricating oil on the linear rail, influence the stability of faying face, can also prevent that profit from permeating ground, cause environmental pollution.

(6) The utility model discloses a longmen machining center's concatenation formula lathe bed is provided with more than a set of stand stationary plane on the public lathe bed, and is provided with more than a set of bearing frame stationary plane on the public lathe bed, and the quantity of stand stationary plane keeps unanimous with the quantity of bearing frame stationary plane, reserves multiunit bearing frame stationary plane and stand stationary plane on public lathe bed, makes things convenient for the lathe bed concatenation of different models, and accommodation is more extensive.

Drawings

Fig. 1 is a schematic front view structure diagram of a spliced bed body of a gantry machining center of the present invention;

fig. 2 is a schematic top view of the spliced bed body of the gantry machining center of the present invention;

fig. 3 is a left side view structural diagram of the utility model;

fig. 4 is a schematic diagram of a right-view structure of the middle splicing bed body of the utility model;

FIG. 5 is a schematic side view of the key assembly of the present invention;

FIG. 6 is a schematic front view of the fixing member and the adjusting member of the present invention;

fig. 7 is a schematic top view of the fixing member of the present invention;

fig. 8 is a front view schematic diagram of the middle connection member of the present invention.

The reference numerals in the schematic drawings illustrate:

110. a common bed; 101. a column fixing surface; 102. a bearing seat fixing surface; 111. a common mounting surface; 120. splicing the lathe bed; 121. splicing the mounting surfaces; 122. a sealing groove; 130. an oil blocking groove; 140. a keyway; 200. a diagonal key combination; 210. a fixing member; 211. a mating segment; 212. a receiving section; 213. mounting holes; 220. an adjustment member; 221. an adjustment hole; 230. a connecting member; 231. connecting holes; 232. a connecting section; 233. an abutting section; 234. and adjusting the bolt.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

With reference to fig. 1 to 7, the spliced lathe bed of the gantry machining center of the present embodiment includes a common lathe bed 110 and a spliced lathe bed 120, wherein the common lathe bed 110 may have a uniform size, and the spliced lathe bed 120 may have different length sizes, and the common lathe bed 110 having the same size and the spliced lathe bed 120 having different sizes may be used to splice gantry machining center lathe beds having different lengths, so as to realize splicing of machine tools having different lengths, reduce the length of a single-section lathe bed, and facilitate casting and transportation; meanwhile, the common bed body is used as a universal material, so that the stock is facilitated, and the production cost is reduced. In this embodiment, the common bed body 110 and the split bed body 120 are connected by a connecting screw, specifically, in this embodiment, the joint surfaces at the split joint of the common bed body 110 and the split bed body 120 are the common mounting surface 111 and the split mounting surface 121, a plurality of threaded holes are formed in the positions corresponding to the common mounting surface 111 and the split mounting surface 121, and the connecting screw sequentially passes through the screw holes of the common mounting surface 111 and the split mounting surface 121 to connect the common bed body 110 and the split bed body 120 together.

When the common bed body 110 and the spliced bed body 120 are connected by the connecting screw, the splicing position of the common bed body 110 and the spliced bed body 120 is deviated in the process of locking the connecting screw, so that the problem of poor coplanarity of the guide surfaces of the common bed body 110 and the spliced bed body 120 is caused, and the processing precision of the machine tool is influenced. In order to solve the above problem, in this embodiment, the key grooves 140 are formed at the positions corresponding to the two side walls of the joint surface of the common bed body 110 and the spliced bed body 120, the key grooves 140 extend along the width direction of the bed body, that is, in the orientation shown in fig. 1, and the key grooves 140 extending inwards are formed at the positions corresponding to the front and rear side walls of the joint surface of the common bed body 110 and the spliced bed body 120. The two key slots 140 are internally connected with a bevel key combination 200 for adjusting the vertical height position of the spliced lathe bed 120, and the vertical height position of the spliced lathe bed 120 is adjusted by adjusting the bevel key combination 200 on the left side wall and the right side wall, so that the common lathe bed 110 and the spliced lathe bed 120 are ensured to be finally positioned at the same height position, and the coplanarity of the guide surfaces of the common lathe bed 110 and the spliced lathe bed 120 is effectively ensured.

As shown in fig. 2, in this embodiment, key grooves 140 are formed in positions corresponding to width centers of a joint surface at a joint of the common bed body 110 and the spliced bed body 120, the key grooves 140 extend in a height direction of the bed body, and taper key combinations 200 for adjusting left and right horizontal positions of the spliced bed body 120 are connected in the two key grooves 140, so that the left and right horizontal positions of the spliced bed body 120 are adjusted by adjusting the middle taper key combination 200, thereby avoiding a problem of left and right offset of the common bed body 110 and the spliced bed body 120, further ensuring coplanarity and assembly accuracy of guide surfaces of the common bed body 110 and the spliced bed body 120, and ensuring post-processing accuracy. In this embodiment, the joint between the common bed body 110 and the spliced bed body 120 is installed and adjusted by using the structure of the feather key combination 200, so that the installation and debugging of the line rail installation bottom surface of the bed body are convenient to install and debug and the side leaning surfaces are convenient to have the same height and the same width, the middle feather key combination 200 is used for adjusting the left and right horizontal positions, and the feather key combinations 200 on the two side walls are used for adjusting the up and down height positions.

With reference to fig. 5-8, the taper key assembly 200 of the present embodiment includes a fixing member 210 disposed in the key slot 140 of the common bed 110, the fixing member 210 includes a receiving section 212 embedded in the key slot 140, and a matching section 211 is disposed at a central position of a side of the receiving section 212 away from the common bed 110, as shown in fig. 7, an extending length of the matching section 211 is consistent with an extending length of the receiving section 212 and is smaller than the extending length of the key slot 140. The upper side surface and the lower side surface of the matching section 211 are symmetrically arranged inclined surfaces, the upper inclined surface and the lower inclined surface of the matching section 211 are respectively provided with a matching adjusting piece 220, the adjusting pieces 220 and the matching section 211 are combined and then embedded into the key groove 140 of the spliced lathe bed 120, and the stress of a connecting screw can be reduced due to the inclined combination design of the adjusting pieces 220 and the matching section 211, so that the long-term stability between the joint surfaces of the common lathe bed 110 and the spliced lathe bed 120 can be kept. Specifically, as shown in fig. 7, in this embodiment, the upper and lower slopes of the matching section 211 are in an outer eight-shaped structure, and the adjusting element 220 moves on the receiving section 212, so as to conveniently adjust the upper and lower height positions of the splicing bed 120.

The specific adjusting mode is as follows: when the height position is adjusted, the upper adjusting pieces 220 above the matching sections 211 of the inclined key combinations 200 on the left side and the right side of the machine body are inwards extruded, the upper adjusting pieces 220 move inwards in the key grooves 140, and the machine body 120 is upwards abutted and spliced, so that the height position of the spliced machine body 120 is improved; the lower adjusting piece 220 below the matching section 211 is pressed inwards, the upper adjusting piece 220 moves inwards in the key groove 140, and therefore the spliced lathe bed 120 is pushed downwards, the height position of the spliced lathe bed 120 is lowered, the height position of the spliced lathe bed 120 is adjusted by adjusting the positions of the upper adjusting piece 220 and the lower adjusting piece 220 of the left-side and right-side inclined key combination 200, the spliced lathe bed 120 and the common lathe bed 110 are located at the same height, and the coplanarity of the guide surfaces of the spliced lathe bed 120 and the common lathe bed 110 is guaranteed. When horizontal position adjustment is carried out, the left adjusting piece 220 on the left side of the matching section 211 of the lathe bed center inclined key combination 200 is extruded downwards, the left adjusting piece 220 moves downwards in the key groove 140, and therefore the lathe bed 120 is spliced to the left top, and the spliced lathe bed 120 moves to the left integrally; the lower adjusting piece 220 on the right side of the matching section 211 is extruded inwards, the right adjusting piece 220 moves downwards in the key groove 140, so that the spliced lathe bed 120 is pushed to the right, the whole spliced lathe bed 120 moves rightwards, the height position of the spliced lathe bed 120 is adjusted by adjusting the positions of the left adjusting piece 220 and the right adjusting piece 220 of the center taper key combination 200, the spliced lathe bed 120 and the common lathe bed 110 are ensured to be located at the same horizontal position, and the coplanarity of the guide surfaces of the spliced lathe bed 120 and the common lathe bed 110 is further ensured.

As shown in fig. 5 and 8, in this embodiment, a connecting member 230 is connected to the outer sides of the fixing member 210 and the adjusting member 220, the connecting member 230 includes a connecting section 232, the connecting section 232 is used for connecting the upper and lower adjusting members 220 and the fixing member 210 together to form the taper key assembly 200, specifically, an abutting section 233 for abutting against the outer end face of the fixing member 210 is disposed on the inner side of the connecting section 232 in this embodiment, connecting holes 231 are disposed at positions of the connecting member 230 corresponding to the fixing member 210, and a connecting screw sequentially penetrates through the connecting holes 231 of the connecting member 230 and the fixing member 210 to fix the connecting member 230 to the fixing member 210. The connecting member 230 and the adjusting member 220 are respectively provided with a through hole and an adjusting hole 221 at corresponding positions, the adjusting screw 234 sequentially passes through the through hole on the connecting member 230 and the adjusting hole 221 on the adjusting member 220 to connect the connecting member 230 and the adjusting member 220 together, wherein the adjusting hole 221 is a threaded hole matched with a threaded section on the adjusting screw 234. As shown in fig. 5, in the present embodiment, the adjusting screw 234 is screwed into the through hole, so as to press the adjusting member 220 inward, and further push the split bed 120 upward or downward, thereby achieving height position adjustment of the split bed 120.

In this embodiment, the key groove 140 is a U-shaped groove, and the height dimension of the receiving section 212 is matched with the dimension of the U-shaped opening of the key groove 140, that is, as shown in the orientation shown in fig. 3, the upper end and the lower end of the receiving section 212 both extend to the upper end and the lower end of the U-shaped opening of the key groove 140, so as to prevent the receiving section 212 from shifting up and down in the key groove 140. As shown in fig. 6, in this embodiment, the width of the adjusting member 220 and the width of the engaging section 211 are both the same as the width of the receiving section 212, and the width dimension of the receiving section 212 is the same as the width dimension of the key groove 140, that is, the adjusting member 220 is completely supported by the receiving section 212, so as to ensure the stability of the adjusting member 220 walking on the receiving section 212. As shown in fig. 7, in the embodiment, the fixing element 210 is provided with a mounting hole 213 and a fixing hole at a position corresponding to the key slot 140 of the common bed 110, the mounting hole 213 penetrates through the sum of the thicknesses of the fitting section 211 and the receiving section 212, and the fixing bolt penetrates through the mounting hole 213 and the fixing hole in sequence and fixes the fixing element 210 in the key slot 140 of the common bed 110.

Example 2

The spliced lathe bed of the gantry machining center has the basic structure as in embodiment 1, and further, in this embodiment, the sealing groove 122 is formed in the splicing mounting surface 121, and the sealing ring is arranged in the sealing groove 122, so that the sealing performance of a joint surface can be effectively improved, the stability of the joint surface at the splicing position is ensured, and further, the follow-up machining precision is guaranteed.

As shown in fig. 2, in this embodiment, the oil blocking grooves 130 are respectively formed on both sides of the common bed body 110 and the spliced bed body 120 in the width direction near the splicing position, and the oil blocking grooves 130 can guide the lubricating oil on the linear rail into the oil drainage grooves on the bed body, so that not only can the oil and water be effectively prevented from permeating into the joint surface and affecting the stability of the joint surface, but also the oil and water can be prevented from permeating into the ground and causing environmental pollution.

With reference to fig. 1 and fig. 2, in the present embodiment, more than one set of column fixing surfaces 101 is disposed on the common bed 110, more than one set of bearing seat fixing surfaces 102 is disposed on the common bed 110, the number of the column fixing surfaces 101 is consistent with the number of the bearing seat fixing surfaces 102, and a plurality of sets of bearing seat fixing surfaces 102 and column fixing surfaces 101 are reserved on the common bed 110, so that splicing of beds of different models is facilitated, and the application range is wider.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a longmen machining center's concatenation formula lathe bed which characterized in that: the split joint lathe comprises a common lathe bed (110) and a split joint lathe bed (120), wherein the common lathe bed (110) is connected with the split joint lathe bed (120) through a connecting screw, key grooves (140) are formed in the positions, corresponding to the two side walls, of a joint surface of the split joint of the common lathe bed (110) and the split joint lathe bed (120), the key grooves (140) extend along the width direction of the lathe bed, and an inclined key combination (200) used for adjusting the height position of the split joint lathe bed (120) is connected in the two key grooves (140).

2. The spliced bed of the gantry machining center of claim 1, wherein: key grooves (140) are formed in the positions corresponding to the width centers of the joint surfaces of the common lathe bed (110) and the spliced lathe bed (120), the key grooves (140) extend along the height direction of the lathe bed, and inclined key combinations (200) used for adjusting the horizontal position of the spliced lathe bed (120) are connected in the two key grooves (140).

3. The spliced bed of the gantry machining center according to claim 2, wherein: the inclined key combination (200) comprises a fixing piece (210) arranged in a key groove (140) of a common lathe bed (110), the fixing piece (210) comprises a bearing section (212) embedded in the key groove (140), a matching section (211) is arranged at the center of one side of the bearing section (212) far away from the common lathe bed (110), the upper side surface and the lower side surface of the matching section (211) are inclined planes which are symmetrically arranged, the upper inclined plane and the lower inclined plane of the matching section (211) are respectively provided with a matching adjusting piece (220), and the adjusting pieces (220) and the matching section (211) are combined and then embedded in the key groove (140) of the splicing lathe bed (120) together.

4. The spliced bed of the gantry machining center according to claim 3, wherein: the outer sides of the fixing piece (210) and the adjusting piece (220) are connected with a connecting piece (230), the connecting piece (230) comprises a connecting section (232), and the inner side of the connecting section (232) is provided with an abutting section (233) for abutting against the outer side end face of the fixing piece (210).

5. The spliced bed of the gantry machining center according to claim 4, wherein: connecting holes (231) are formed in the corresponding positions of the connecting piece (230) and the fixing piece (210), and the connecting screw penetrates through the connecting holes (231) in the connecting piece (230) and the fixing piece (210) in sequence to fix the connecting piece (230) on the fixing piece (210).

6. The spliced bed of the gantry machining center of claim 5, wherein: adjusting holes (221) are formed in the corresponding positions of the connecting piece (230) and the adjusting piece (220), and adjusting screws (234) sequentially penetrate through the adjusting holes (221) in the connecting piece (230) and the adjusting piece (220) to connect the connecting piece (230) and the adjusting piece (220).

7. The spliced bed of a gantry machining center according to any one of claims 1 to 6, wherein: the joint surfaces of the joint positions of the common lathe bed (110) and the joint lathe bed (120) are respectively a common mounting surface (111) and a joint mounting surface (121), a sealing groove (122) is formed in the joint mounting surface (121), and a sealing ring is arranged in the sealing groove (122).

8. The spliced bed of the gantry machining center of claim 7, wherein: oil blocking grooves (130) are formed in the two sides, close to the splicing position, of the width direction of the common lathe bed (110) and the splicing lathe bed (120).

9. The spliced bed of the gantry machining center of claim 8, wherein: more than one group of upright post fixing surfaces (101) are arranged on the common lathe bed (110), more than one group of bearing seat fixing surfaces (102) are arranged on the common lathe bed (110), and the number of the upright post fixing surfaces (101) is consistent with that of the bearing seat fixing surfaces (102).

10. The spliced bed of the gantry machining center according to claim 3, wherein: the key groove (140) is a U-shaped groove, and the height dimension of the bearing section (212) is matched with the dimension of the U-shaped opening of the key groove (140).