CN206550759U - Gantry machining center - Google Patents

Abstract

A gantry machining center, comprising a sliding saddle, a spindle box slidably arranged on the sliding saddle, a lifting mechanism respectively connecting the sliding saddle and the spindle box, a guide assembly and a balance mechanism, and a first motor and a transmission mechanism respectively arranged on the spindle box and the spindle; the saddle surrounds the spindle box; the first motor connects the spindle through the transmission mechanism to drive the spindle to drive the tool to rotate; there are four guide rails on the spindle box, of which two guide rails are located at the back of the spindle box, and the other two guide rails are respectively Located on both sides of the headstock, the sliding saddle is respectively provided with sliders for sliding the guide rails corresponding to the guide rails. The utility model sets the guide assembly and the balance mechanism connecting the saddle and the headstock, and arranges wire rails on the back and both sides of the headstock, so that the headstock slides more stably, so that the spindle has higher machining rigidity and precision , In addition, the balance mechanism also automatically adjusts the balance of the headstock, which can avoid the headstock from tilting.

Description

Longmen processing center

technical field

The utility model relates to a numerical control processing design and manufacturing technology, in particular to a gantry processing center.

Background technique

The CNC gantry machining center is mainly composed of a bed, a worktable, left and right columns, a beam, a saddle, a main gearbox, a console, an electrical control box, and a drive control device. It can complete milling, drilling, reaming, boring and other multi-process processing, and is suitable for rough and fine processing of large and medium-sized parts in various industries. Chinese patent discloses a CNC gantry car milling, boring, planing and grinding heavy-duty machine tool (publication number: CN101502933A), which consists of a bed, a reciprocating table, a composite column, a beam, a top beam, a rotary power head, a chuck, a tailstock, a main Transmission mechanism, grinding head, milling and boring head, planer tool holder, turning tool holder, electrical control system, etc.; the reciprocating worktable is guided by linear guide rails on the bed, and the reciprocating worktable is composed of the main drive The reciprocating table completes the reciprocating movement, the reciprocating movement speed range: 0.02-60000mm/min; the two composite columns are connected with the two sides of the bed with fasteners; the top beam and the upper end of the two composite columns are connected with fasteners Connection; the beams are respectively installed on the guide rails on both sides of the composite column, driven by double-headed servo motors to drive the screw to rotate, thereby completing the up and down movement of the beams; the milling and boring heads and turning tool holders on the beams are respectively driven by servo motors to drive The screw rotates to complete the horizontal feed of the milling and boring head and the turning tool holder; the grinding head and planer tool holder on the beam are respectively driven by servo motors to drive the screw to rotate to complete the horizontal feed of the grinding head and planer holder; The advanced grinding head and planer holder are respectively installed on the guide rails of the composite column, and are respectively driven by servo motors to drive the screw to rotate to complete the up and down feeding movement of the grinding head and planer holder. However, this kind of machine tool has only two linear rails, and the rigidity of the ram is relatively poor when sliding, so that the machining rigidity and precision of the spindle to the workpiece are relatively poor.

Utility model content

Based on this, the utility model provides a gantry machining center, which mainly solves the technical problems in the prior art that the machine tool has only two line rails, and the rigidity of the ram is poor when sliding, so that the machining accuracy of the spindle is poor.

In order to realize the purpose of the utility model, the utility model adopts the following technical solutions:

A gantry machining center, comprising a saddle, a headstock slidingly arranged on the saddle, a lifting mechanism respectively connecting the saddle and the headstock, a guide assembly and a balance mechanism, and a headstock respectively arranged on the headstock The first motor, the transmission mechanism and the main shaft; the saddle surrounds the main shaft box; the first motor is connected to the main shaft through the transmission mechanism; the main shaft box is provided with four guide rails, wherein two guide rails are located on the The back of the headstock, the other two guide rails are respectively located on both sides of the headstock, the saddle is respectively provided with sliders for slidingly connecting the guide rails corresponding to each of the guide rails; the guide assembly includes two A guide rod arranged on the top of the saddle and two guide plates arranged on the top of the headstock, the guide rods correspond to the guide plates one by one, the guide rods are respectively located on both sides of the headstock, the Two guide rods pass through the two guide plates respectively; the balance mechanism includes two balance cylinders arranged in the saddle, two distance sensors arranged on the top of the saddle and two distance sensors arranged on the top of the headstock a balance plate; the balance cylinders are respectively located on both sides of the headstock, the balance plates correspond to the balance cylinders one by one, and the two balance cylinders are respectively connected to the output shafts of the two balance cylinders; the distance sensor There is a one-to-one correspondence between the devices and the balance boards.

The above-mentioned gantry machining center, by setting the guide assembly and the balance mechanism connecting the saddle and the headstock, and setting guide rails on the back and both sides of the headstock, makes the headstock slide more stable, so that the spindle has a higher machining efficiency. Rigidity and precision, in addition, the balance mechanism can also prevent the spindle box from tilting, ensuring that the spindle can drive the tool to process the workpiece accurately.

In one embodiment, a linear motion bearing is provided between each guide rod and the corresponding guide plate.

In one embodiment, the front of the saddle is provided with observation holes corresponding to each of the balance cylinders.

In one embodiment, each of the guide rails is connected to the headstock through screws.

In one of the embodiments, the lifting mechanism includes a second motor arranged on the top of the headstock and a screw rod located behind the headstock, the screw rod is connected to the output shaft of the second motor, and the threaded Attach the saddle.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the gantry machining center described in a preferred embodiment of the present invention;

Fig. 2 is a structural schematic diagram of another orientation of the gantry machining center shown in Fig. 1;

FIG. 3 is a structural schematic diagram of another orientation of the gantry machining center shown in FIG. 1 .

In the picture:

10. Saddle; 11. Slider; 12. Observation hole; 20. Spindle box; 21. Guide rail; 30. Lifting mechanism; 40. Guide assembly; 41. Guide plate; 42. Guide rod; 43. Linear motion bearing; 50. Balance mechanism; 51. Balance cylinder; 52. Balance plate; 53. Distance sensor; 60. First motor; 70. Main shaft.

detailed description

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the utility model are provided in the accompanying drawings. However, the invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present utility model more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

As shown in Figures 1 to 3, it is a gantry machining center of a preferred embodiment of the present invention, which includes a saddle 10, a headstock 20 slid on the saddle 10, connecting the saddle 10 and the headstock 20 respectively The lifting mechanism 30, the guide assembly 40 and the balance mechanism 50 and the first motor 60, the transmission mechanism (not shown) and the main shaft 70 which are respectively arranged on the headstock 20; the saddle 10 surrounds the headstock 20; the first motor 60 is connected to the main shaft 70 through a transmission mechanism to drive the main shaft 70 to drive the tool to rotate. In this scheme, the balance mechanism 50 is used to prevent the headstock 20 from tilting; the lifting mechanism 30 is used to drive the headstock 20 to slide up and down on the saddle 10, and the guide mechanism is used to control the movement of the headstock 20 on the saddle 10. to guide.

As shown in Figure 3, four guide rails 21 are provided on the spindle box 20, wherein two guide rails 21 are located at the back of the spindle box 20, and the other two guide rails 21 are respectively located on both sides of the spindle box 20. The wire rails 21 are respectively provided with sliders 11 that slide the wire rails 21 . In this embodiment, each wire rail 21 is connected to the headstock 20 by screws, which facilitates the disassembly and assembly of the wire rails 21 on the headstock 20 .

The lifting mechanism 30 includes a second motor arranged on the top of the headstock 20 and a screw rod located at the back of the headstock 20 , the screw rod is connected to the output shaft of the second motor, and is screwed to the saddle 10 .

The guide assembly 40 includes two guide rods 42 located at the top of the saddle 10 and two guide plates 41 located at the top of the headstock 20. The guide rods 42 correspond to the guide plates 41 one by one. The guide rods 42 are located on both sides of the headstock 20 respectively. The guide rods 42 respectively pass through the two guide plates 41 . A linear motion bearing 43 is provided between each guide rod 42 and the corresponding guide plate 41 .

The balance mechanism 50 includes two balance cylinders 51 located in the saddle 10, two distance sensors 53 located at the top of the slide saddle 10, and two balance plates 52 located at the top of the headstock 20; On both sides, the balance board 52 is in one-to-one correspondence with the balance cylinder 51, and the two balance cylinders 51 are respectively connected to the output shafts of the two balance cylinders 51; the distance sensor 53 is in one-to-one correspondence with the balance board 52, and is used to measure the balance between the two balance boards 52 and the saddle. 10 to determine whether the headstock 20 is tilted. When the lifting mechanism 30 drives the headstock 20 to lift up and down on the saddle 10, the two balance cylinders 51 also follow the lifting mechanism 30 to exert force on the headstock 20 to further ensure that the headstock 20 does a stable lifting movement. When the headstock 20 moves to At the specified position, the distance sensor 53 measures the distance from the two balance boards 52 to the saddle 10. If the distance between the two balance boards 52 and the top of the saddle 10 is measured, the distance sensor 53 adjusts the balance by controlling the balance cylinder 51. The height of the plate 52 makes the distance from the two balance plates 52 to the top of the saddle 10 equal to ensure that the headstock 20 will not tilt, so that the spindle 70 can drive the tool to process the workpiece accurately.

In this embodiment, the front part of the saddle 10 is provided with observation holes 12 corresponding to the balance cylinders 51 for penetrating through the working state of the balance cylinders 51 .

The above-mentioned gantry machining center, by setting the guide assembly 40 and the balance mechanism 50 connecting the saddle 10 and the headstock 20, and setting the guide rails 21 on the back and both sides of the headstock 20, makes the headstock 20 slide more stably, thereby The main shaft 70 has high machining rigidity and precision. In addition, the balance mechanism 50 can also prevent the headstock 20 from tilting, ensuring that the main shaft 70 can drive the tool to process the workpiece accurately.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. A gantry machining center, characterized in that it comprises a saddle, a headstock that is slidably arranged on the saddle, a lifting mechanism that connects the saddle and the headstock respectively, a guide assembly and a balance mechanism and is respectively arranged on The first motor, transmission mechanism and main shaft on the headstock; the saddle surrounds the headstock; the first motor is connected to the main shaft through a transmission mechanism; four guide rails are arranged on the headstock, Wherein two wire rails are located at the back of the headstock, and the other two wire rails are respectively located on both sides of the headstock, and corresponding to each of the wire rails on the saddle are respectively provided with sliders for slidingly connecting the wire rails; The guide assembly includes two guide rods arranged on the top of the saddle and two guide plates arranged on the top of the headstock, the guide rods correspond to the guide plates one by one, and the guide rods are respectively located The two guide rods pass through the two guide plates respectively; the balance mechanism includes two balance cylinders arranged in the saddle, two distance sensors arranged on the top of the saddle and two distance sensors arranged on the top of the saddle. The balance plate on the top of the headstock; the balance cylinders are respectively located on both sides of the headstock, the balance plate corresponds to the balance cylinders one by one, and the two balance cylinders are respectively connected to the output of the two balance cylinders axis; the distance sensor is in one-to-one correspondence with the balance board. 2. The gantry machining center according to claim 1, wherein a linear motion bearing is provided between each guide rod and the corresponding guide plate. 3. The gantry machining center according to claim 1, wherein observation holes are provided on the front of the saddle corresponding to each of the balance cylinders. 4. The gantry machining center according to claim 1, characterized in that each of the guide rails is connected to the headstock by screws. 5. The gantry machining center according to claim 1, wherein the lifting mechanism comprises a second motor arranged on the top of the headstock and a screw rod located behind the headstock, the screw rod is connected to the The output shaft of the second motor is screwed to the saddle.