CN115609299A - A beam and a numerically controlled machine tool - Google Patents

Abstract

The present invention relates to a crossbeam, comprising a crossbeam body and at least two columns fixed on the crossbeam body, one end of the crossbeam body has a first extension section, the first extension section is used to install a first spindle assembly, and the bottom of the first extension section is The first tool change area, the first tool change area is used for the passage of the first tool magazine; at least two columns are arranged at the bottom of the beam body at intervals; the area between the two columns is the second tool change area, and the beam body also includes A connection section connecting the first extension section, the connection section is located above the second tool change area and is used for installing the second spindle assembly, the first tool change area and the second tool change area pass through one of the at least two columns Separated, the second tool change area is used for the passage of the second tool magazine. The invention also provides a numerical control machine tool. The beam provided by the technical solution of the present invention improves the space utilization rate of the beam body.

Description

A beam and a numerically controlled machine tool

technical field

The invention relates to the technical field of processing equipment, in particular to a machine tool.

Background technique

In equipment with multiple spindles for processing, the spindle is generally installed on a beam. Since the longer the beam, the wider the width of the corresponding base will be designed, so the length of the beam will not be infinitely long. The working table All are installed between two columns. Due to the limited space between the two columns, when multiple spindles move on the beam, the movement of two adjacent spindles will be interfered, and only multiple spindles can keep moving synchronously. , so multiple spindles can only process the same product at the same time, which limits the types of products processed by the spindle.

Contents of the invention

The present invention provides a crossbeam structure, the crossbeam body has a first extension section, the first extension section is used to install the first spindle assembly, the first extension section is the first tool change area, and the length of the crossbeam can be increased at the same time, There is no need to increase the width of the base, so that the movement of two adjacent main shafts along the beam direction will not be interfered.

The present invention provides a beam, comprising a beam body and at least two columns fixed to the beam body,

One end of the beam body has a first extension section, the first extension section is used to install the first spindle assembly, the first extension section is the first tool change area, and the first tool change area is used for the passage of the first tool magazine;

At least two columns are arranged at intervals on the bottom of the beam body;

The area between the two uprights is the second tool change area, and the beam body also includes a connection section connecting the first extension section, which is located above the second tool change area and is used for installing the second spindle assembly. The tool area is separated from the second tool changing area by one of the at least two columns, and the second tool changing area is used for the passage of the second tool magazine.

In some feasible embodiments, the crossbeam body further includes a second extension section connected to the connecting section, the second extension section is used to install the third spindle assembly, the third tool change area is below the second extension section, and the third tool change section The zone is separated from the second tool change zone by another one of the at least two columns, and the third tool change zone is used for the passage of the third tool magazine.

In some feasible embodiments, the second extension section is used to install the third main shaft assembly, and the lengths of the first extension section, the connecting section, and the second extension section along the length direction of the beam body are consistent, so that the first main shaft assembly, the second main shaft assembly The strokes of the second main shaft assembly and the third main shaft assembly along the length direction of the beam body are consistent.

In some feasible embodiments, multi-segment reinforcing ribs are also included;

The beam body includes two side walls and a rear wall connected to the two side walls, and the two side walls and the rear wall are provided with lightening holes;

Each section of reinforcing rib is connected with the bottom of the beam body and the side wall of at least one column, and each section of reinforcing rib is connected with the bottom wall of the beam body and close to the rear wall.

In some feasible embodiments, each section of reinforcing rib includes a beam reinforcement section connected to the beam body and a column reinforcement section connected to the column, and the beam reinforcement section is connected to the column reinforcement section.

In some feasible embodiments, a water retaining strip is provided on the top wall of the beam body near the front wall.

In some feasible embodiments, the front wall of the beam body is provided with a mounting groove along the middle of the length direction of the beam body. The height of the bar itself is higher than that of the upper fixing bar itself, and the upper fixing bar and the lower fixing bar are used for installing the first main shaft assembly and the second main shaft assembly.

In some feasible embodiments, the installation groove includes at least three groups of motor installation parts arranged at intervals, two adjacent motor installation parts are arranged in a dislocation along the horizontal direction, and the heights of the two separated motor installation parts are kept the same.

The present invention also provides a numerically controlled machine tool, comprising a base, a first tool magazine, a second tool magazine, a first spindle assembly, a second spindle assembly, a first workbench, a second workbench and the above beam;

The first tool magazine and the second tool magazine are slidably arranged on the base and located at the rear end of the base, at least two workbenches are slidably arranged on the base and are located at the front end of the base, the first main shaft assembly faces the first workbench, and the second main shaft The assembly faces the second workbench.

In some feasible embodiments, it also includes a third tool magazine, a third spindle assembly, and a third workbench;

The beam body also has a second extension section, the first extension section and the second extension section are respectively located at both ends of the beam body, the third tool change area is below the second extension section, and the third tool exchange area is used for the third Tool magazine pass;

The third workbench is slidably arranged at the front end of the base and arranged side by side with the first workbench and the second workbench;

The third tool magazine is slidably arranged at the rear end of the base and arranged side by side with the first tool magazine and the second tool magazine;

The third spindle assembly faces the third table.

The above beam has a first extension section through the beam body, the first extension section is used to install the first spindle assembly, and the first tool change area is below the first extension section, so that the space under the first extension section is utilized to improve Improve the space utilization of the beam body.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings that are required in the description of the embodiments or the prior art. Apparently, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other accessories according to the structure shown in these drawings without creative work. picture.

Fig. 1 is a perspective view of a beam provided by an embodiment of the present invention.

Fig. 2 is a front view of a beam provided by an embodiment of the present invention.

Fig. 3 is a left side view of a beam provided by an embodiment of the present invention.

FIG. 4 is an enlarged schematic diagram of A in FIG. 3 .

Fig. 5 is a schematic diagram of a numerically controlled machine tool provided by an embodiment of the present invention.

Fig. 6 is a rear view of a beam provided by an embodiment of the present invention.

Description of component symbols

99. Beam; 10. Beam body; 12. First extension section; 121. First tool change area; 13. Installation groove; 131. Upper fixing bar; 132. Lower fixing bar; 133. First motor installation part; 134 , the second motor installation part; 135, the third motor installation part; 14, the water retaining strip; 15, the front wall; 151, the supporting step; 16, the top wall; Two extension sections; 102, the third tool change area; 103, the second tool change area; 104, the first motor base; 105, the first tailstock; 106, the second motor base; 107, the second tailstock; 108, The third motor seat; 109, the third tailstock; 20, the column; 21, the beam connection section; 22, the base connection section; 23, the transition section; 24, the first column; 25, the second column; 30, the reinforcing rib; 31. Beam reinforcement section; 32. Column reinforcement section; 100. CNC machine tool; 98. X-axis moving component; 97. Second tool magazine; 96. First tool magazine; 951. First workbench; 952. Second work 953, the third workbench; 931, the spindle mechanism; 932, the Z-axis moving mechanism; 933, the first spindle assembly; 934, the second spindle assembly; 935, the third spindle assembly; 92, the third tool magazine; 91 , base.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In order to have a clearer and more accurate understanding of the content of the present invention, it will now be described in detail with reference to the accompanying drawings. The drawings of the specification illustrate examples of embodiments of the invention, wherein like reference numerals refer to like elements. It can be understood that the proportions shown in the drawings of the description are not the proportions of the actual implementation of the present invention, which are for illustrative purposes only, and are not drawn according to the original scale.

Please refer to FIGS. 1-6 together. The present invention provides a CNC machine tool 100. The CNC machine tool 100 includes at least two spindle assemblies, a base 91, at least two workbenches, a second tool magazine 97, a first tool magazine 96, at least Two X-axis moving assemblies and beam 99.

Please refer to Figures 1 and 2 together, the beam 99 includes a beam body 10, at least two columns 20 fixed to the beam body 10, and multiple ribs 30, at least two columns 20 are installed at the bottom of the beam body 10 at intervals, each The section reinforcing rib 30 is connected with the beam body 10 and the column 20 .

The beam body 10 has a first extension section 12 , and at least two upright posts 20 are arranged at intervals on the bottom of the beam body 10 .

At least two uprights 20 include a first upright 24 and a second upright 25, and the area below the beam body 10 is divided into two tool change areas by the first upright 24, and the two tool change areas are the second tool change area 103 and the second tool change area 103 respectively. The first tool change area 121 is convenient for two tool magazines to pass through in the two tool change areas, so that the space of the two tool change areas can be utilized, and the space utilization rate under the beam body 10 can be improved, thereby improving the numerical control machine tool. 100's of compactness. On the other hand, the lower area of the beam body 10 is divided into two tool changing areas by the first column 24, so that the distance between the two columns 20 can be reduced, thereby increasing the capacity of the beam body 10 to a greater extent. length to provide longer X-axis travel for multiple spindle assemblies. Even if the length of the beam body 10 is increased, the two columns 20 can be installed on the base 91 of the original size without increasing the width of the base 91, thereby avoiding an increase in the overall cost of the CNC machine tool 100 due to the increase in the width of the base 91.

Please refer to Fig. 3, each column 20 all comprises the crossbeam connection section 21 that is connected with the crossbeam body 10, the base connection section 22 that is connected with the base 91 and the transition section 23 that connects the crossbeam connection section 21 and the base connection section 22, the crossbeam connection section The horizontal cross-sectional dimension of 21 is smaller than the horizontal cross-sectional dimension of the base connecting section 22 , thereby improving the connection strength between the column 20 and the base 91 .

Please refer to FIG. 5 , the area between the two columns 20 is the second tool changing area 103 , and the second tool changing area 103 is used for installing the second external tool magazine 97 . Below the first extension section 12 is a first tool changing area 121 , the first tool changing area 121 is used for passing the first tool magazine 96 , and the second tool changing area 103 is used for passing the second tool magazine 97 . Therefore, the space below the first extension section 12 and the space below between the first column 24 and the second column 25 are utilized to improve the space utilization rate of the CNC machine tool 100 .

In the following, the number of uprights 20 is two, namely the first upright 24 and the second upright 25 . There are three main shaft assemblies, namely a first main shaft assembly 933 , a second main shaft assembly 934 and a third main shaft assembly 935 . There are three workbenches, namely the first workbench 951 , the second workbench 952 and the third workbench 953 . There are three tool magazines, namely the second tool magazine 97 , the first tool magazine 96 and the third tool magazine 92 . The first upright post 24 and the second upright post 25 are respectively fixed on three equal parts of the bottom wall of the beam body 10 as an example for description. It can be understood that, in some other embodiments, when one upright column is located at the third bisection of the beam body 10 and the other upright column is located at the other end, the number of spindle assemblies and workbenches are both two.

Please refer to Fig. 5, the crossbeam body 10 also has a second extension section 101, the crossbeam body 10 also includes a connection section 19 connecting the first extension section 12, the second extension section 101 is a third tool changing area 102, the third tool changing area 102 The tool zone 102 is used for the passage of the third tool magazine 92 . In this way, the beam body 10 is sequentially composed of the first extension section 12 , the connecting section 19 and the second extension section 101 along the length direction.

Below the first extension section 12 is a first tool changing area 121 for passing the first tool magazine 96 . The space below the connecting section 19 and between the first column 24 and the second column 25 is the second tool changing area 103 for passing the second tool magazine 97 . Below the second extension section 101 is a third tool change area 102 for the third tool magazine 92 to pass through.

In this embodiment, the first upright post 24 and the second upright post 25 are respectively installed at three equal parts of the bottom of the beam body 10 . It can be understood that the first column 24 and the second column 25 have a certain width, and the middle position of each column 20 along the width direction is aligned with the third third of the bottom of the beam body 10, so that it is convenient to determine the position on the beam body 10. The installation position of the upright column 20 can better realize the positioning of the beam body 10 and the upright column 20 .

Please refer to Fig. 5 again, in order to keep the X-axis strokes of the three spindle assemblies consistent, so that the three spindle assemblies can process different products respectively, and the moving strokes do not interfere with each other. The second extension section 101 is used to install the third spindle assembly 935. The first extension section 12, the second extension section 101, and the section of the beam body 10 between the two uprights are consistent along the length direction of the beam body 10, so as to The strokes of the first spindle assembly 933 , the second spindle assembly 934 and the third spindle assembly 935 along the length direction of the beam body 10 are consistent. The lengths of the first extension section 12, the connection section 19 and the second extension section 101 along the length direction of the beam body 10 are basically consistent, that is to say, the first extension section 12, the connection section 19 and the second extension section 101 are all along the beam. The difference in length between any two in the length direction of the main body 10 is within 1-10mm.

Please refer to FIGS. 2 , 3 and 6 together. The beam body 10 includes two side walls and a rear wall connected to the two side walls. Lightening holes 17 are provided on the two side walls and the rear wall. In order to improve the overall rigidity of the beam body 10 , avoid reducing the overall rigidity of the beam body 10 due to the setting of the lightening hole 17 , and improve the connection strength between the beam body 10 and the column 20 . Each section of reinforcing rib 30 is connected to the bottom of the beam body 10 and the sidewall of at least one column 20 , and each section of reinforcing rib 30 is connected to the bottom wall of the beam body 10 and is close to the rear wall. Since the front wall 15 of the beam body 10 is not provided with a lightening hole, the reinforcing rib 30 is connected to the bottom wall of the beam body 10 and is close to the position of the rear wall, which can offset the lowering of the beam body 10 caused by the setting of the lightening hole 17 The connection strength with the column 20.

Please refer back to FIG. 2 , in order to ensure the rigidity of the beam body 10 while saving the materials of the ribs 30 , thereby reducing the overall weight of the beam body 10 and making the beam body 10 lighter. Each section of reinforcing rib 30 comprises a crossbeam reinforcement section 31 connected with the crossbeam body 10 and a column reinforcement section 32 connected with the column 20, the height of the crossbeam reinforcement section 31 is set in proportion to the height of the crossbeam body 10, for example, the crossbeam reinforcement section 31 The ratio of the height value to the height value of the beam body 10 is 1/8-1/11. The width value of the column reinforcement section 32 is set in proportion to the width value of the column 20 , for example, the ratio of the width value of the column reinforcement section 32 to the width value of the column 20 is 1/8-1/11. The height of the beam reinforcing section 31 increases with the height of the beam body 10 , so that the height of the beam reinforcing section 31 is adapted to the height of the beam body 10 . The width value of the column reinforcement section 32 increases with the increase of the width value of the column 20, so that the width of the column reinforcement section 32 is adapted to the width of the column 20, which can not only improve the connection strength between the beam body 10 and the column 20, but also The material of the reinforcing rib 30 is saved.

Please refer to FIG. 5 again, each column 20 is fixedly connected with the base 91 . Each spindle assembly is mounted on the front wall 15 of the beam 99, and each spindle assembly faces a workbench. Three workbenches are arranged on the front end of the base 91 at intervals, the first workbench 951 faces the first extension section 12 and the first spindle assembly 933, the second workbench 952 faces the connecting section 19 and the second spindle assembly 934, and the third workbench 953 faces the second extension section 101 and the third spindle assembly 935 . Both the second tool magazine 97 and the first tool magazine 96 are slidably connected with the base 91, the second tool magazine 97 can extend into the second spindle assembly 934 below, and the first tool magazine 96 can extend into the first spindle assembly 933 Downside, the third tool magazine 92 can extend into the bottom of the third spindle assembly 935 .

Please refer back to FIG. 3 , in order to facilitate the support of the main shaft assembly by the beam body 10 . The front wall 15 of the beam body 10 is provided with a mounting groove 13 along the middle part of the length direction of the beam body 10, and the front wall 15 of the beam body 10 includes an upper fixing bar 131 positioned above the mounting groove 13 and a lower fixing bar 132 positioned below the mounting groove 13 , the height of the lower fixing bar 132 itself is higher than the height of the upper fixing bar 131 itself. Each of the three spindle assemblies includes a spindle mechanism 931 , an X-axis moving assembly 98 and a Z-axis moving mechanism 932 . The X-axis moving assembly 98 is connected with the upper fixing bar 131 and the lower fixing bar 132 . The spindle mechanism 931 is connected with the X-axis moving assembly 98 through the Z-axis moving mechanism 932 .

Please refer back to FIG. 2 , the mounting groove 13 includes at least three groups of motor mounting parts arranged at intervals, two adjacent motor mounting parts are arranged in a dislocation along the horizontal direction, and the heights of the two separated motor mounting parts are kept the same. In this embodiment, at least three groups of motor mounting parts are respectively the first motor mounting part 133, the second motor mounting part 134, and the third motor mounting part 135. The first motor mounting part 133 is close to one end of the mounting groove 13, and the second Motor motor installation part 134 is positioned at the middle position of installation groove 13, and the 3rd motor installation part 135 is positioned at the other end of installation groove 13, and the first motor installation part 133 and the 3rd motor installation part 135 are arranged at the same height, and the second motor installation part 134 The third motor mounting part 135 is offset in the horizontal direction, which can make full use of the space of the mounting groove 13, facilitate the position design of the three motor seats, and improve the space utilization rate of the mounting groove 13.

Please refer back to FIG. 2 , in order to fix the X-axis moving assembly 98 in the installation groove 13 more conveniently. The first X-axis moving assembly is installed on the first extension section 12, the second X-axis moving assembly is installed on the beam body 10 and located between the first column 24 and the second column 25, and the third X-axis moving assembly is installed on the first Two extensions 101. The first X-axis moving assembly includes a horizontally arranged first motor base 104 and a first tailstock 105, the second X-axis moving assembly includes a horizontally arranged second motor base 106 and a second tailstock 107, and the third X-axis moving assembly It includes a third motor base 108 and a third tailstock 109 arranged horizontally. The first motor base 104 and the second motor base 106 are staggered along the height direction of the installation groove 13, the first motor base 104 and the third motor base 108 are aligned in the horizontal direction, and the first motor base 104 is fixed to the first extension section 12, The second motor base 106 is fixed on the connecting section 19 , and the third motor base 108 is fixed on the second extension section 101 . Thus, the space of the front wall 15 of the beam body 10 is better utilized.

Please refer to Fig. 5 again, in order to make it easier for the tool magazine to extend under the spindle assembly or retract from below the spindle assembly. Each workbench is installed on the base 91 and is positioned at the front end of the base 91, and each tool magazine is installed on the base 91 and is positioned at the rear end of the base 91, and the moving direction of each workbench is the Y-axis direction, and the moving direction of each tool magazine is the Y-axis direction, and each workbench and the corresponding tool magazine are arranged in a straight line along the Y-axis direction, so as to improve the space utilization rate of the base 91 along the Y-axis direction.

Please refer to FIG. 4 , in order to prevent the water on the top wall 16 of the beam body 10 from flowing into the X-axis guide rail from the front wall 15 , the top wall 16 of the beam body 10 is provided with a water retaining strip 14 near the front wall 15 . For example, the side of the top wall 16 of the beam body 10 near the front wall 15 protrudes upwards to form a water retaining strip 14 , and the water retaining strip 14 can be integrally formed with the beam body 10 . Therefore, the water on the top wall 16 of the beam body 10 can be blocked from flowing to the front wall 15 of the beam body 10, thereby preventing the water on the top wall 16 from corroding the X-axis guide rail. In some other embodiments, the water retaining strip 14 is detachably connected to the beam body 10 , so as to facilitate the replacement of the water retaining strip 14 .

Please refer to Fig. 4 again, the X-axis moving assembly 98 includes an X-axis guide rail. In order to facilitate the installation of the X-axis guide rail, a support step 151 is provided on the front wall 15 of the beam body 10. The support step 151 is in a right-angle shape, and the X-axis guide rail is placed on the support. The bottom of the step 151 is also fixed to the side of the supporting step 151 , and the bottom of the supporting step 151 can support the X-axis guide rail, so that the X-axis guide rail is fixed on the side of the supporting step 151 . In this embodiment, the depth of the bottom edge of the supporting step 151 is greater than the thickness of the guide rail bars of the X-axis guide rail, so as to stably support the X-axis guide rail.

The above beam 99 has a first extension section 12 through the beam body 10, the first extension section 12 is used to install the first spindle assembly 933, the first extension section 12 is the first tool change area 121, the first tool change area 121 It is used for the passage of the first tool magazine 96 so as to utilize the space under the first extension section 12 and improve the space utilization rate of the beam body 10 .

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

The above-listed are only preferred embodiments of the present invention, which certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (10)

1. A crossbeam is characterized by comprising a crossbeam body (10) and at least two upright posts (20) fixed on the crossbeam body (10),

one end of the beam body (10) is provided with a first extension section (12), the first extension section (12) is used for mounting a first spindle assembly (933), a first tool changing area (121) is arranged below the first extension section (12), and the first tool changing area (121) is used for a first tool magazine (96) to pass through;

at least two upright posts (20) are arranged at the bottom of the beam body (10) at intervals;

the area between two stands (20) is second tool changing area (103), and crossbeam body (10) are still including connecting linkage segment (19) of first extension section (12), linkage segment (19) are located second tool changing area (103) top and are used for installing second main shaft subassembly (934), and first tool changing area (121) is separated through a stand in at least two stands (20) with second tool changing area (103), and second tool changing area (103) are used for supplying second tool magazine (97) to pass through.

2. The crossmember according to claim 1, wherein the crossmember body (10) further comprises a second extension section (101) connected to the connecting section (19), the second extension section (101) being adapted to mount a third spindle assembly (935), a third tool change area (102) being provided below the second extension section (101), the third tool change area (102) being separated from the second tool change area (103) by another of the at least two uprights (20), the third tool change area (102) being adapted to allow a third magazine (92) to pass through.

3. The crossmember according to claim 2, wherein the lengths of the first extension section (12), the connecting section (19) and the second extension section (101) in the length direction of the crossmember body (10) are kept uniform, so that the strokes of the first spindle assembly (933), the second spindle assembly (934) and the third spindle assembly (935) in the length direction of the crossmember body (10) are kept uniform.

4. The crossmember according to claim 1, further comprising a plurality of sections of reinforcement ribs (30);

the beam body (10) comprises two side walls and a rear wall connected with the two side walls, and lightening holes (17) are formed in the two side walls and the rear wall;

each section of reinforcing rib (30) is connected with the bottom of the beam body (10) and the side wall of at least one upright post (20), and each section of reinforcing rib (30) is connected with the bottom wall of the beam body (10) and is close to the position of the rear wall.

5. The cross beam according to claim 4, wherein each section of the reinforcing rib (30) comprises a cross beam reinforcing section (31) connected with the cross beam body (10) and a column reinforcing section (32) connected with the column (20), and the cross beam reinforcing section (31) is connected with the column reinforcing section (32).

6. The crossmember according to claim 1, wherein the top wall (16) of the crossmember body (10) is provided with a water bar (14) adjacent to the front wall (15).

7. The cross beam according to any one of claims 1 to 6, wherein a mounting groove (13) is formed in the middle of the front wall (15) of the cross beam body (10) in the length direction of the cross beam body (10), the front wall (15) of the cross beam body (10) comprises an upper fixing strip (131) located above the mounting groove (13) and a lower fixing strip (132) located below the mounting groove (13), the height of the lower fixing strip (132) is higher than that of the upper fixing strip (131), and the upper fixing strip (131) and the lower fixing strip (132) are used for mounting the first spindle assembly (933) and the second spindle assembly (934).

8. The beam according to claim 7, characterized in that the mounting groove (13) comprises at least three groups of motor mounting parts arranged at intervals, two adjacent motor mounting parts are arranged in a staggered manner along the horizontal direction, and the heights of the two motor mounting parts at intervals are kept consistent.

9. A numerically controlled machine tool comprising a base (91), a first tool magazine (96), a second tool magazine (97), a first spindle assembly (933), a second spindle assembly (934), a first table (951), a second table (952), and a beam according to any one of claims 1 to 8;

first tool magazine (96) and second tool magazine (97) slide and set up on base (91) and be located the rear end of base (91), and two at least workstation slides and set up on base (91) and be located the front end of base (91), and first main shaft assembly (933) is towards first workstation (951), and second main shaft assembly (934) is towards second workstation (952).

10. The numerical control machine tool according to claim 9, further comprising a third magazine (92), a third spindle assembly (935), a third table (953);

the beam body (10) is further provided with a second extension section (101), the first extension section (12) and the second extension section (101) are respectively located at two end portions of the beam body (10), a third tool changing area (102) is arranged below the second extension section (101), and the third tool changing area (102) is used for allowing a third tool magazine (92) to pass through;

the third workbench (953) is arranged at the front end of the base (91) in a sliding mode and is arranged side by side with the first workbench (951) and the second workbench (952);

the third tool magazine (92) is arranged at the rear end of the base (91) in a sliding mode and is arranged side by side with the first tool magazine (96) and the second tool magazine (97);

the third spindle assembly (935) is directed toward the third stage (953).

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