Double-spindle vertical four-axis machining center

Abstract

The utility model relates to a double-spindle vertical four-axis machining center which comprises a stand column arranged on a base, a first sliding rail is arranged on one side of the stand column in the horizontal direction, two sets of machining units are arranged on the first sliding rail in a sliding mode, and each machining unit comprises a sliding table, a spindle box and a first driving piece. The sliding table is in sliding connection with the first sliding rail, and the side, away from the stand column, of the sliding table is fixedly connected with a second sliding rail in the vertical direction and is in sliding connection with a spindle box. The utility model relates to the technical field of machining centers. According to the double-spindle vertical four-axis machining center, the two spindle boxes can be driven to move at the same time through the arranged vertical feeding assembly, so that the control difficulty of the machining center is lowered, the spindles can make contact with workpieces more quickly, and the machining efficiency of the machining center is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining centers, in particular to a double-spindle vertical four-axis machining center. Background Art

[0002] CNC machining center is a high-efficiency automatic machine tool composed of mechanical equipment and CNC system suitable for processing complex parts. It has strong comprehensive processing ability, can complete more processing content after clamping the workpiece once, and has high processing accuracy. For batch workpieces with medium processing difficulty, its efficiency is 5 to 10 times that of ordinary equipment. In particular, it can complete many processing that ordinary equipment cannot complete, and is more suitable for single-piece processing with complex shapes and high precision requirements or small and medium batch multi-variety production.

[0003] According to a dual-spindle vertical four-axis machining center disclosed in Chinese patent publication number CN216576949U, it includes a base and a column, two horizontal first guide rails are arranged side by side on the column, and a first slide and a second slide are slidably installed on the two first guide rails, and the first slide and the second slide can be close to or away from each other under the drive of the first screw rod and the second screw rod respectively; the first slide is slidably connected to the first spindle box through the second guide rail and the slider, and the first spindle box can move vertically up and down under the drive of the third screw rod, and the second slide is slidably connected to the second spindle box through the third guide rail and the slider, and the second spindle box can move vertically up and down under the drive of the fourth screw rod; a group of fourth guide rails are horizontally installed on the base, and a workbench is slidably installed on the above-mentioned fourth guide rails, and the workbench can move along the fourth guide rails under the drive of the fifth screw rod. The present application provides a dual-spindle vertical four-axis machining center, which can realize fine-tuning and large-range adjustment of the distance between the two spindles, and can perform four-axis direction processing at the same time.

[0004] According to the above patent, its two machining spindles are each provided with an independent drive motor and a lead screw, which increases the use cost of the machining center. Moreover, the independent drive motor and the lead screw require independent control to compensate for the height error when the machining spindle approaches the workpiece, thereby increasing the control difficulty of the machining center and affecting the machining efficiency of the machining center. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a dual-spindle vertical four-axis machining center so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A dual-spindle vertical four-axis machining center comprises a column arranged on a base, a slide rail 1 is arranged on one side of the column in a horizontal direction, two groups of machining units are slidably arranged on the slide rail 1, each group of the machining units comprises a slide table, a spindle box and a first driving member, the slide table is slidably connected to the slide rail 1, a side of the slide table away from the column is fixedly connected to the slide rail 2 in a vertical direction and is slidably connected to the spindle box, a first driving member for driving the slide table to slide is connected to one side of the column, a vertical feed assembly is arranged between the two spindle boxes, and the spindle box and the vertical feed assembly are connected via a suspension unit.

[0008] Furthermore, the vertical feed assembly includes a support plate, a slide plate and a second driving member. The top and bottom of the side wall of the column are fixedly connected to the support plate, and a second driving member is arranged between the two support plates. The screw rod of the second driving member is threadedly connected to the slide plate. The side wall of the spindle box is provided with an avoidance groove for avoiding the slide plate, and the avoidance groove is connected to the slide plate through a suspension unit.

[0009] Furthermore, sliding rods are provided on both sides of the support plate located on the second driving member, and the sliding rods are slidably connected to the sliding plate.

[0010] Furthermore, the suspension unit includes a piston, a connecting rod and a sliding rail three. The top of the skateboard is fixedly connected to the linear rail three, and the linear rail three is slidably connected to the connecting rod. The end of the connecting rod away from the skateboard is fixedly connected to the piston, and the inner top wall of the avoidance groove is provided with a pressure chamber for accommodating the piston and is slidably connected to the piston.

[0011] Furthermore, a plurality of through grooves are formed in an annular array on the top of the piston, and electromagnetic valves are connected in the through grooves. Pressure sensors for controlling the electromagnetic valves are fixedly connected to the top and bottom of the piston.

[0012] Furthermore, the inner top wall of the avoidance groove is provided with slots on both sides of the pressure chamber, support columns are slidably connected in the slots, and the bottom of the support column is slidably connected to the slide rail.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects:

[0014] 1. This dual-spindle vertical four-axis machining center can drive two spindle boxes to move at the same time through the vertical feed assembly, thereby reducing the control difficulty of the machining center, allowing the spindle to contact the workpiece faster, thereby improving the machining efficiency of the machining center, and by driving two spindle boxes to move at the same time through a vertical feed assembly, the machining center can save a set of drive components, thereby reducing the production cost of the machining center and making the machining center easier to promote;

[0015] 2. This dual-spindle vertical four-axis machining center can automatically correct the height difference when the spindle approaches the workpiece through the setting of the hovering unit, so that the processing progress of the workpiece remains the same, further reducing the operating difficulty of the machining center, and the setting of the hovering unit can also relatively fix the spindle box and the slide after the height difference is corrected, so that the spindle obtains sufficient processing pressure, so that the machining center can better process the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a dual-spindle vertical four-axis machining center.

[0018] Figure 2 The utility model is a schematic diagram of the structure of a hovering unit in a dual-spindle vertical four-axis machining center.

[0019] Figure 3 The utility model is a schematic diagram of the structure of a piston in a dual-spindle vertical four-axis machining center.

[0020] In the figure, 1, column; 2, slide rail one; 3, machining unit; 31, slide; 32, spindle box; 33, first driving member; 4, slide rail two; 5, vertical feed assembly; 51, support plate; 52, slide plate; 53, second driving member; 6, suspension unit; 61, piston; 62, connecting rod; 63, slide rail three; 7, avoidance groove; 8, slide rod; 9, pressure chamber; 10, through groove; 11, solenoid valve; 12, pressure sensor; 13, slot; 14, support column. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Example:

[0023] Reference Figure 1 - Figure 3The utility model discloses a dual-spindle vertical four-axis machining center, including a column 1 arranged on a base, a slide rail 2 is arranged on one side of the column 1 in the horizontal direction, two groups of machining units 3 are slidably arranged on the slide rail 2, each group of the machining units 3 includes a slide 31, a spindle box 32 and a first driving member 33, the slide 31 is slidably connected to the slide rail 2, the side of the slide 31 away from the column 1 is fixedly connected with a slide rail 4 in the vertical direction, and is slidably connected with the spindle box 32, one side of the column 1 is connected with a first driving member 33 for driving the slide 31 to slide, a vertical feed assembly 5 is arranged between the two spindle boxes 32, and the spindle box 32 and the vertical feed assembly 5 are connected via a suspension unit 6.

[0024] In this embodiment, the workpiece is placed on the workbench on the base, and then the first driving member 33 is started, so that the first driving member 33 pushes the slide 31 to move the spindle box 32 in the horizontal direction until the processing spindle at the bottom of the spindle box 32 is aligned with the processing point of the workpiece, and then the spindle box 32 is lowered through the vertical feed assembly 5, and then the spindle will approach the workpiece and contact the workpiece. After the spindle contacts the workpiece, the workpiece can be processed. By setting a vertical feed assembly 5 to simultaneously drive two spindle boxes 32 to move down to process the workpiece, the cost required for the production of the machining center can be reduced, and the setting of a vertical feed assembly 5 can also reduce the control difficulty of the machining center, so that the machining center can process the workpiece faster and improve the machining efficiency of the machining center.

[0025] When there is a height difference between the two workpieces, the support force provided by the workpiece on the spindle is used to make the spindle box 32 stop moving due to the obstruction of the workpiece, while the other spindle has not yet contacted the workpiece, so the corresponding spindle box 32 will continue to move downward along with the drive of the vertical feed assembly 5. After the other spindle also contacts the workpiece and the two spindle boxes 32 are blocked by the workpiece and cannot move further downward, the installation height difference of the two spindle boxes 32 with respect to the workpiece can be automatically corrected, so that the processing progress of the two spindles on the workpiece remains the same.

[0026] When one of the processing points of the workpiece is completed, the spindle needs to be driven to process another processing point. When the vertical feed assembly 5 drives the spindle box 32 to move upward, because the spindle box 32 and the vertical feed assembly 5 can slide relative to each other, the two spindle boxes 32 will be reset, so that when processing a new point, it is necessary to readjust the height difference, which affects the processing efficiency. Therefore, the spindle box 32 and the vertical feed assembly 5 are connected by a suspension unit 6, so that the two spindle boxes 32 correct the height difference of the workpiece in the vertical direction, and then the suspension unit 6 is used to fix the position of the two spindle boxes 32 and the vertical feed assembly 5, so that the two spindle boxes 32 do not need to be additionally positioned when processing the remaining points, thereby further improving the processing efficiency.

[0027] Among them, the above-mentioned first driving member 33 can be a driving mechanism that drives the motor to rotate the screw to make the slide 31 slide along the axis of the screw, and the above-mentioned base and workbench are the same as the base and workbench in Chinese patent publication No. CN216576949U. Since no improvements have been made to it and other technical features, they will not be described in detail.

[0028] In a further preferred embodiment of the present invention, Figure 1 As shown, the vertical feed assembly 5 includes a support plate 51, a slide plate 52 and a second driving member 53. The top and bottom of the side wall of the column 1 are fixedly connected with the support plate 51, and a second driving member 53 is arranged between the two support plates 51. The screw rod of the second driving member 53 is threadedly connected with the slide plate 52. The side wall of the spindle box 32 is provided with an avoidance groove 7 for avoiding the slide plate 52, and the avoidance groove 7 is connected to the slide plate 52 through a suspension unit 6.

[0029] In this embodiment, by setting up a second driving member 53, the slide plate 52 can be pushed forward in the vertical direction, so that the slide plate 52 slides with the spindle box 32 on the slide rail 2 4, thereby controlling the lifting and lowering of the spindle box 32, so that the spindle of the spindle box 32 can approach and process the workpiece.

[0030] Because the two spindle boxes 32 need to compensate for the installation height difference of the workpiece, the two spindle boxes 32 need to be lowered by different distances, and the two spindle boxes 32 are both controlled to rise and fall by the slide 52. Therefore, an avoidance groove 7 is opened in the spindle box 32, and the avoidance groove 7 is connected to the slide 52 through the hovering unit 6, so that the spindle box 32 and the slide 52 can move relative to each other, so that the two spindle boxes 32 can be actively corrected according to the height of the workpiece, so that the processing progress of the two workpieces remains the same.

[0031] The second driving member 53 is a driving mechanism in which a motor drives a lead screw to control the movement of the slide plate 52 in the vertical direction.

[0032] In a further preferred embodiment of the present invention, Figure 1 As shown, the support plate 51 is provided with sliding rods 8 on both sides of the second driving member 53 , and the sliding rods 8 are slidably connected to the sliding plate 52 .

[0033] In this embodiment, because the skateboard 52 is relatively long, and the spindle boxes 32 on both sides of the skateboard 52 will adjust their horizontal positions according to the position of the workpiece, the two spindle boxes 32 are asymmetrically arranged on both sides of the skateboard 52. As a result, when the spindle boxes 32 are supported by the workpiece, the force applied to the skateboard 52 by the resistance thereof cannot be balanced, causing one side of the skateboard 52 to tilt up, causing the skateboard 52 to apply a shear force to the screw rod of the second driving member 53, damaging the thread of the screw rod, thereby affecting the movement of the skateboard 52.

[0034] Therefore, slide bars 8 are provided on both sides of the support plate 51 located at the second driving member 53, and the slide bars 8 are used to provide support for the slide plate 52 to strengthen the force applied to the slide plate 52, thereby making the operation of the vertical feed assembly 5 more stable.

[0035] In a further preferred embodiment of the present invention, Figure 2 As shown, the hovering unit 6 includes a piston 61, a connecting rod 62 and a sliding rail three 63. The top of the slide plate 52 is fixedly connected to the linear rail three, and the connecting rod 62 is slidably connected to the linear rail three. The end of the connecting rod 62 away from the slide plate 52 is fixedly connected to the piston 61, and the inner top wall of the avoidance groove 7 is provided with a pressure chamber 9 for accommodating the piston 61 and is slidably connected to the piston 61.

[0036] In this embodiment, due to the setting of the avoidance groove 7, the slide plate 52 can move in the avoidance groove 7, which causes the connection between the spindle box 32 and the vertical feed assembly 5 to be not strong enough, affecting the pressure applied by the spindle when processing the workpiece, thereby affecting the processing effect of the workpiece, so a connecting rod 62 is provided on the top of the slide plate 52, and a piston 61 is connected through the connecting rod 62, and a pressure chamber 9 for accommodating the piston 61 is opened in the avoidance groove 7, so that when the spindle processes the workpiece, the piston 61 is used to squeeze the damping oil in the pressure chamber 9 to obtain supporting force, so that the spindle can apply sufficient pressure on the workpiece to process the workpiece.

[0037] Because the spindle box 32 needs to adjust the horizontal direction according to the installation position of the workpiece, the spindle box 32 will move in the horizontal direction, which will cause the pressure chamber 9 to move with the piston 61 in the horizontal direction. Therefore, in order to ensure the connection stability between the piston 61 and the slide plate 52, a slide rail 3 63 is connected to the top of the slide plate 52, and the connecting rod 62 is slidably connected to the slide rail 3 63, so that the spindle box 32 can be freely adjusted in the horizontal direction while maintaining a stable connection with the slide plate 52.

[0038] In a further preferred embodiment of the present invention, Figure 3 As shown, a plurality of through grooves 10 are formed in a circular array on the top of the piston 61 , and a solenoid valve 11 is connected inside the through groove 10 . A pressure sensor 12 for controlling the solenoid valve 11 is fixedly connected to the top and bottom of the piston 61 .

[0039] In this embodiment, because the piston 61 needs to move in the pressure chamber 9 to adjust the position of the spindle box 32, and needs to hover in the pressure chamber 9 so that the spindle box 32 has sufficient pressure when processing the workpiece, a through groove 10 is opened on the top of the piston 61, and an electromagnetic valve 11 is connected in the through groove 10, and the top and bottom of the piston 61 are connected to pressure sensors 12, so that when the spindle contacts the workpiece, as the vertical feed assembly 5 continues to operate, the slide plate 52 will pull the spindle box 32 to continue to move downward, and then the pressure at the bottom of the piston 61 increases, and the pressure sensor 12 transmits the detected data to the PLC controller. When the pressure exceeds the set value, the electromagnetic valve 11 is opened, and then the damping oil can flow through the through groove 10, so that the spindle box 32 can move relative to the slide plate 52. After the height difference between the spindle box 32 and the workpiece is corrected, the electromagnetic valve 11 is closed, thereby achieving the effect of fixing the position between the spindle box 32 and the slide plate 52.

[0040] By making the upper limit of the detection threshold of the pressure sensor 12 greater than the processing pressure of the spindle, the spindle box 32 can be adjusted before processing, and will not slide relative to the slide plate 52 due to squeezing during processing, making the processing of the workpiece more stable.

[0041] Among them, the above-mentioned PLC controller is a PLC controller that comes with the machining center, and the pressure threshold for opening the solenoid valve 11 can be adjusted according to the actual needs of the machining workpiece, so that the machining center can maintain sufficient machining pressure on the spindle when machining different workpieces.

[0042] In a further preferred embodiment of the present invention, Figure 2 As shown, the inner top wall of the avoidance groove 7 is provided with slots 13 on both sides of the pressure chamber 9, and support columns 14 are slidably connected in the slots 13, and the bottom of the support column 14 is slidably connected to the slide rail three 63.

[0043] In this embodiment, by providing the support column 14, the contact points between the main spindle box 32 and the slide plate 52 can be increased, so that the movement between the main spindle box 32 and the slide plate 52 is more stable, and the main spindle box 32 has a better effect on the workpiece processing.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-spindle vertical four-axis machining center, comprising a column (1) arranged on a base, characterized in that: A slide rail (2) is arranged on one side of the column (1) in the horizontal direction, and two groups of processing units (3) are slidably arranged on the slide rail (2), and each group of processing units (3) includes a slide table (31), a spindle box (32) and a first driving member (33). The slide table (31) is slidably connected to the slide rail (2), and the side of the slide table (31) away from the column (1) is fixedly connected to the slide rail (4) in the vertical direction and is slidably connected to the spindle box (32). One side of the column (1) is connected to a first driving member (33) for driving the slide table (31) to slide, and a vertical feed assembly (5) is arranged between the two spindle boxes (32), and the spindle box (32) and the vertical feed assembly (5) are connected via a suspension unit (6).

2. A dual-spindle vertical four-axis machining center according to claim 1, characterized in that: The vertical feed assembly (5) comprises a support plate (51), a slide plate (52) and a second driving member (53); the top and bottom of the side wall of the column (1) are fixedly connected to the support plate (51); a second driving member (53) is arranged between the two support plates (51); the screw rod of the second driving member (53) is threadedly connected to the slide plate (52); the side wall of the spindle box (32) is provided with an avoidance groove (7) for avoiding the slide plate (52); the avoidance groove (7) is connected to the slide plate (52) via a suspension unit (6).

3. A dual-spindle vertical four-axis machining center according to claim 2, characterized in that: The support plate (51) is provided with sliding rods (8) on both sides of the second driving member (53), and the sliding rods (8) are slidably connected to the sliding plate (52).

4. A dual-spindle vertical four-axis machining center according to claim 2, characterized in that: The suspension unit (6) comprises a piston (61), a connecting rod (62) and a sliding rail three (63); the top of the slide plate (52) is fixedly connected to the linear rail three, the linear rail three is slidably connected to the connecting rod (62), the end of the connecting rod (62) away from the slide plate (52) is fixedly connected to the piston (61), and the inner top wall of the avoidance groove (7) is provided with a pressure chamber (9) for accommodating the piston (61) and is slidably connected to the piston (61).

5. A dual-spindle vertical four-axis machining center according to claim 4, characterized in that: A plurality of through grooves (10) are formed in an annular array on the top of the piston (61), and a solenoid valve (11) is connected inside the through groove (10). A pressure sensor (12) for controlling the solenoid valve (11) is fixedly connected to the top and bottom of the piston (61).

6. A dual-spindle vertical four-axis machining center according to claim 4, characterized in that: The inner top wall of the avoidance groove (7) is provided with slots (13) on both sides of the pressure chamber (9), and a support column (14) is slidably connected in the slot (13), and the bottom of the support column (14) is slidably connected to the slide rail three (63).

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