Vertical milling center

Abstract

The utility model discloses a vertical milling center. The vertical milling center comprises a base, a ram, a spindle box and a workbench, a slope saddle inclining downwards and backwards is formed on the lathe base, the slope top and the slope bottom of the slope saddle are each provided with a transverse-axis-direction guide rail parallel to each other, the bottom of the ram is connected to the transverse-axis-direction guide rail of the slope top and the transverse-axis-direction guide rail of the slope bottom through sliding blocks, so that the gravity center of the ram shifts backwards, and the ram and a spindle box are prevented from inclining forwards together. A vertical axis direction guide rail is also arranged on the rear pillow surface of the ram, a bearing beam is fixed on the front pillow surface, extends from the ram, winds to one side of the rear pillow surface of the ram, is connected with the vertical axis direction guide rail on the rear pillow surface of the ram through a sliding block, and can provide supporting force for one side of the suspended front pillow surface of the main shaft box; stress balance of the front side and the rear side of the spindle box is maintained, load bearing force is dispersed, the problems of structural deformation and the like caused by single-side concentrated stress are prevented, derailing of the spindle box is avoided, stability of the overall structure is maintained, and machining precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of milling centers, in particular to a vertical milling center. Background Art

[0002] Milling is a mechanical processing method that uses a milling cutter as a tool to process the surface of an object. With the development of science and technology and the improvement of the overall level of manufacturing, companies have begun to use milling centers for milling operations to improve operating efficiency. Milling centers can complete milling, boring, drilling, tapping and cutting threads, and are mainly suitable for processing complex parts such as plates, discs, molds and small shells.

[0003] The height direction or vertical axis direction of the vertical milling center is perpendicular to the workbench. The spindle box is generally connected to the vertical axis guide rail extending along the vertical axis by sliding, and is hung on the side of the structure such as the slide or column on which the vertical axis guide rail is mounted. It is driven by a screw motor to move up and down along the side, while the other side of the spindle box away from it is not supported by any load-bearing structure and is suspended above the workbench. As the use time of the vertical milling center increases, the uneven force on the spindle box may cause the connection structure between the spindle box and the vertical axis guide rail to deform. The concentrated force on one side can easily cause the spindle box to deviate or leave the track, and shift in the vertical axis direction, affecting the processing accuracy. For various complex precision parts that are often used, the quality impact caused cannot be ignored. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a vertical milling center to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a vertical milling center, which comprises a bed, a ram, a spindle box and a workbench.

[0007] A sloped saddle is formed on the bed base, and the top and bottom of the sloped saddle are respectively provided with mutually parallel transverse axis guide rails. The bottom of the slide is respectively connected to the transverse axis guide rail at the top of the slope and the transverse axis guide rail at the bottom of the slope through sliders. The bottom of the slide cooperates with the sloped saddle to form a bottom surface parallel to the sloped saddle. A longitudinal axis guide rail is laid on the bed base, and the workbench is slidably connected to the longitudinal axis guide rail through the slider. The front and rear pillow surfaces of the slide are perpendicular to the longitudinal axis guide rail. A vertical axis guide rail and a vertical axis screw motor are provided on the front pillow surface of the slide. The spindle box is slidably connected to the vertical axis guide rail through the slider, and is suspended above the workbench so that it can be lifted and lowered above the workbench along the front pillow surface of the slide under the drive of the vertical axis screw motor.

[0008] Among them, the top of the sloped saddle is located on the side where the front pillow surface of the slide is located, the bottom of the sloped saddle is located on the side where the rear pillow surface of the slide is located, and the bottom of the sloped saddle is inclined downward and backward; a vertical axis guide rail is also arranged on the rear pillow surface of the slide, and a load-bearing beam is fixed on the side of the main shaft box opposite to the front pillow surface of the slide, and the load-bearing beam extends from the slide, goes around to the side of the rear pillow surface of the slide, and is connected to the vertical axis guide rail at the rear pillow surface of the slide through a slider.

[0009] Preferably, one end of the load-bearing beam is screwed to the side surface of the spindle box parallel to the guide rail in the longitudinal direction, adjacent to the lower end of the spindle box.

[0010] Preferably, there are two load-bearing beams, one end of which is respectively fixed to two opposite sides of the main spindle box by screws, and the other end of which is connected to a synchronous connecting plate. Two vertical axis guide rails parallel to each other are arranged on the rear pillow surface of the slide, and the two vertical axis guide rails on the rear pillow surface of the slide are connected to the synchronous connecting plate through a slider.

[0011] Preferably, a supporting bottom rod is provided at the bottom of the spindle box, and two ends of the supporting bottom rod are respectively fixedly connected to the load-bearing beams on both sides.

[0012] Preferably, the slide is also formed with a top inclined surface which is inclined downward and backward on one side of the rear pillow surface.

[0013] Preferably, a non-slip buffer pad is provided at the bottom of the bed base, and a threaded connection hole is provided in the non-slip buffer pad.

[0014] Preferably, a tunnel is formed at the bottom of the sloped saddle to allow the workbench to move along the guide rail in the longitudinal direction of the bed base.

[0015] Preferably, a reinforcing rib is provided on the side of the spindle box, and the reinforcing rib spans between the slider connected to the side of the spindle box and the front pillow surface of the ram.

[0016] The technical effects achieved by the technical solution of the utility model include:

[0017] The vertical milling center, on the one hand, forms a saddle with a sloped surface tilted backward on the bed base, and the ram is connected to the horizontal axis guide rails at the top and bottom of the slope, which cooperate with the bottom of the corresponding backward-tilted ram, so that the center of gravity of the ram is shifted backward to avoid the ram and the spindle box from tilting forward; on the other hand, a load-bearing beam is fixed on one side of the spindle box suspended and connected to the rear side of the ram. When the spindle box moves along the vertical axis guide rail of the front ram surface, the load-bearing beam can drive the vertical axis guide rail of the rear ram surface to move synchronously, and the load-bearing beam can be used as the main spindle box. The front pillow surface of the axle box is suspended to provide supporting force, and the front and rear sides of the main spindle box are balanced to disperse the load, so as to avoid the situation in which the connecting structure of the front pillow surface of the slide bears all the force on one side as in the vertical milling center of the prior art, and to prevent the concentrated force on one side from eventually causing problems such as structural deformation as the use time increases, so as to avoid derailment of the main spindle box, ensure the processing accuracy of the main spindle box, maintain the stability of the overall structure of the vertical milling center, and is especially suitable for the processing and manufacturing of complex precision parts such as plates, disks, molds and small shells, to meet the needs of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a vertical milling center provided by an embodiment of the utility model;

[0019] Figure 2 is a rear view of the vertical milling center;

[0020] Figure 3 For the corresponding Figure 1 A local enlarged view of the circular dotted box area A in FIG.

[0021] The reference numerals in the above drawings are:

[0022] Bed base 1, sloped saddle 11, give way tunnel 110, slope top 11a, slope bottom 11b, horizontal axis guide rail 12, longitudinal axis guide rail 13, anti-skid cushion 14, ram 2, ram bottom 2a, front ram surface 2b, rear ram surface 2c, top inclined surface 2d, vertical axis guide rail 21, vertical axis screw motor 22, synchronous connecting plate 23, spindle box 3, side surface 3a of spindle box, load-bearing beam 31, supporting bottom rod 32, reinforcing rib 33, workbench 4. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the utility model shown in the accompanying drawings and described according to the accompanying drawings are merely exemplary, and the utility model is not limited to these embodiments.

[0024] Here, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the drawings, while other details that are not very relevant are omitted.

[0025] Reference Figures 1 to 3 As shown, an embodiment of the utility model provides a vertical milling center, which includes a bed 1, a slide 2, a spindle box 3 and a workbench 4.

[0026] A sloped saddle 11 is formed on the bed base 1, and the top 11a and the bottom 11b of the sloped saddle 11 are respectively provided with mutually parallel transverse axis guide rails 12, and the bottom of the slide 2 is respectively connected to the transverse axis guide rail 12 of the top 11a and the transverse axis guide rail 12 of the bottom 11b through sliders, and the bottom 2a of the slide 2 cooperates with the sloped saddle 11 to form a bottom surface parallel to the sloped saddle 11.

[0027] A longitudinal axis guide rail 13 is laid on the bed base 1, and the workbench 4 is slidably connected to the longitudinal axis guide rail 13 through a slider. The front pillow surface 2b and the rear pillow surface 2c on the slide 2 are perpendicular to the longitudinal axis guide rail 13. The front pillow surface 2b of the slide 2 is provided with a vertical axis guide rail 21 and a vertical axis screw motor 22. The spindle box 3 is slidably connected to the vertical axis guide rail 21 through a slider, and is suspended above the workbench 4, so that it can be lifted and moved above the workbench 4 along the front pillow surface 2b of the slide 2 under the drive of the vertical axis screw motor 22.

[0028] Among them, the top 11a of the slope saddle 11 is located on the side where the front pillow surface 2b of the slide 2 is located, the bottom 11b of the slope saddle 11 is located on the side where the rear pillow surface 2c of the slide 2 is located, and the bottom of the slope saddle 11 is inclined downward and backward; a vertical axis guide rail 21 is also provided on the rear pillow surface 2c of the slide 2, and a load-bearing beam 31 is fixed on the side of the main shaft box 3 opposite to the front pillow surface 2b of the slide 2, and the load-bearing beam 31 extends from the slide 2, goes around to the side of the rear pillow surface 2c of the slide 2, and is connected to the vertical axis guide rail 21 at the rear pillow surface 2c of the slide 2 through a slider.

[0029] The vertical milling center provided by the embodiment of the utility model, on the one hand, forms a saddle 11 with a sloped surface tilted backward on the bed base 1, and the slide 2 is connected to the horizontal axis direction guide rail 12 of the slope top 11a and the slope bottom 11b thereof, which cooperates with the bottom 2a of the slide 2 that tilts backward accordingly, so that the center of gravity of the slide 2 is shifted backward, thereby preventing the slide 2 and the spindle box 3 from tilting forward together; on the other hand, by fixing a load-bearing beam 31 connected to one side of the rear pillow surface 2c of the slide 2 on one side suspended on the spindle box 3, when the spindle box 3 moves along the vertical axis direction guide rail of the front pillow surface 2c of the slide 2, the load-bearing beam 31 can drive the rear pillow surface 2c of the slide 2 The guide rails in the vertical axis direction move synchronously, and the load-bearing beam 31 can provide support for one side of the suspended front pillow surface 2c of the main spindle box 3. The front and rear sides of the main spindle box 3 are balanced in force, and the load-bearing force is dispersed, so as to avoid the vertical milling center in the prior art where the connecting structure of the front pillow surface 2c of the slide 2 bears all the force on one side, and prevents the concentrated force on one side from eventually causing structural deformation and other problems with the increase in the length of use, so as to prevent the main spindle box 3 from derailing, ensure the processing accuracy of the main spindle box 3, maintain the stability of the overall structure of the vertical milling center, and is particularly suitable for the processing and manufacturing of complex precision parts such as plates, disks, molds and small shells, to meet the needs of mass production.

[0030] The position where the load-bearing beam 31 is actually fixed to the spindle box 3 can be selected according to the actual stress conditions, material structure and material of the spindle box 3, so as to provide support for the front pillow surface 2b of the slide 2. Specifically, in this embodiment, one end of the load-bearing beam 31 is screwed to the side surface 3a of the spindle box 3 parallel to the longitudinal axis guide rail 13, adjacent to the lower end of the spindle box 3.

[0031] Exemplarily, in order to make the structure more stable, the number of the load-bearing beams 31 is two, one end of the two load-bearing beams 31 is respectively fixed to the two opposite side surfaces 3a of the main spindle box 3 by screws, and the other end of the two load-bearing beams 31 is connected to a synchronous connecting plate 23, and two vertical axis guide rails 21 parallel to each other are arranged on the rear pillow surface 2c of the slide 2, and the two vertical axis guide rails 21 on the rear pillow surface 2c of the slide 2 are connected to the synchronous connecting plate 23 through a slider.

[0032] Furthermore, a supporting bottom rod 32 is provided at the bottom of the spindle box 3 , and two ends of the supporting bottom rod 32 correspond to and are fixedly connected to the load-bearing beams 31 on both sides, that is, the supporting bottom rod 32 extends at the bottom of the spindle box 3 .

[0033] In this embodiment, the load-bearing beam 31 can be made of densely baked metal castings, and the supporting bottom rod 32 can also be made of densely baked metal castings. Densely baked metal castings have sufficient rigidity and low internal stress, and are very suitable as the main load-bearing structure.

[0034] Similarly, in addition to the rearward-inclined structure formed at the bottom of the ram 2, the ram 2 also has a top inclined surface 2d that is inclined downward and rearward on one side of the rear bolster surface 2c, and the inclination angle of the inclined surface can also be designed according to actual needs.

[0035] The bottom of the bed base 1 is provided with an anti-skid cushion pad 14, and a threaded connection hole is opened in the anti-skid cushion pad 14, so that the bed base 1 can be firmly connected to the box body of the vertical milling center and play a buffering and protective role.

[0036] In order to expand the travel of the workbench 4 along the longitudinal axis guide rail 13 on the bed base 1 sufficiently, and to facilitate the loading and unloading of parts to be processed on the workbench, a tunnel 110 is formed at the bottom of the sloped saddle 11 to make way for the workbench 4 to move along the longitudinal axis guide rail 13 on the bed base 1.

[0037] A reinforcing rib 33 is provided on the side 3a of the spindle box 3. The reinforcing rib 33 spans between the side 3a of the spindle box 3 and the slider on the front pillow surface 2b of the slide ram 2. The reinforcing rib 33 can provide further reinforcement and stability for the side of the spindle box 3.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A vertical milling center, characterized in that: It comprises a bed base (1), a ram (2), a spindle box (3) and a workbench (4). A sloped saddle (11) is formed on the bed base (1), and the top (11a) and bottom (11b) of the sloped saddle (11) are each provided with mutually parallel transverse axial guide rails (12). The bottom of the ram (2) is respectively connected to the transverse axial guide rail (12) of the top (11a) and the transverse axial guide rail (12) of the bottom (11b) through a slider, and the bottom (2a) of the ram (2) cooperates with the sloped saddle (11) to form a bottom surface parallel to the sloped saddle (11). A longitudinal guide rail (13) is laid on the bed base (1); the workbench (4) is slidably connected to the longitudinal guide rail (13) via a slider; the front pillow surface (2b) and the rear pillow surface (2c) on the ram (2) are perpendicular to the longitudinal guide rail (13); the front pillow surface (2b) of the ram (2) is provided with a vertical guide rail (21) and a vertical screw motor (22); the spindle box (3) is slidably connected to the vertical guide rail (21) via a slider and is suspended above the workbench (4) so ​​as to be lifted and moved above the workbench (4) along the front pillow surface (2b) of the ram (2) under the drive of the vertical screw motor (22); The top (11a) of the sloped saddle (11) is located on the side where the front pillow surface (2b) of the ram (2) is located, the bottom (11b) of the sloped saddle (11) is located on the side where the rear pillow surface (2c) of the ram (2) is located, and the bottom of the sloped saddle (11) is inclined downward and backward; A vertical axis guide rail (21) is also provided on the rear pillow surface (2c) of the ram (2); a load-bearing beam (31) is fixed on the headstock (3) on the side opposite to the front pillow surface (2b) of the ram (2); the load-bearing beam (31) extends from the ram (2), goes around to the side of the rear pillow surface (2c) of the ram (2), and is connected to the vertical axis guide rail (21) at the rear pillow surface (2c) of the ram (2) via a slider.

2. The vertical milling center according to claim 1, characterized in that: One end of the load-bearing beam (31) is screwed to a side surface (3a) of the spindle box (3) parallel to the longitudinal axis guide rail (13), adjacent to the lower end of the spindle box (3).

3. The vertical milling center according to claim 2, characterized in that: The number of the load-bearing beams (31) is two, one end of the two load-bearing beams (31) is respectively fixed to two opposite side surfaces (3a) of the spindle box (3) by screws, and the other ends of the two load-bearing beams (31) are connected to a synchronous connecting plate (23). Two mutually parallel vertical axis guide rails (21) are arranged on the rear pillow surface (2c) of the ram (2), and the two vertical axis guide rails (21) on the rear pillow surface (2c) of the ram (2) are connected to the synchronous connecting plate (23) through a slider.

4. The vertical milling center according to claim 3, characterized in that: A supporting bottom rod (32) is provided at the bottom of the main shaft box (3), and two ends of the supporting bottom rod (32) are respectively fixedly connected to the load-bearing beams (31) on both sides.

5. The vertical milling center according to claim 1, characterized in that: The slide bolster (2) is also provided with a top inclined surface (2d) which is inclined downward and backward on one side of the rear bolster surface (2c).

6. The vertical milling center according to claim 1, characterized in that: The bottom of the bed base (1) is provided with an anti-skid cushion pad (14), and a threaded connection hole is provided in the anti-skid cushion pad (14).

7. The vertical milling center according to claim 1, characterized in that: The bottom of the sloped saddle (11) is formed with a clearance tunnel (110) for allowing the workbench (4) to move along the guide rail (13) in the longitudinal direction of the bed base (1).

8. The vertical milling center according to claim 1, characterized in that: A reinforcing rib (33) is provided on the side surface (3a) of the spindle box (3), and the reinforcing rib (33) spans between a slider connected to the side surface (3a) of the spindle box (3) and a front bolster surface (2b) of the ram (2).

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