A five-axis linkage numerical control machining center adaptive fixture base

Abstract

The utility model relates to five -axis machine tool part technical field discloses a five -axis linkage numerical control machining center self -adaptation clamp base, including workpiece platform, workpiece platform bottom fixed installation has bottom shell, the inside installation of bottom shell has the motor, workpiece platform top is set up to have the round mouth, workpiece platform top sets up to have a plurality of sliding slots, its a plurality of sliding slots all are provided with elastic screw thread axle assembly, and the side wall of elastic screw thread axle assembly is screwed and is connected with the clamping block assembly, and the rotating transmission mechanism is arranged in the through -hole of workpiece platform top, and the rotating transmission mechanism is provided with a plurality of output ends, and a plurality of output ends extend to a plurality of sliding slots respectively, the utility model discloses when should to the irregular shape workpiece, through setting open -close type connecting shaft ware subassembly and elastic screw thread axle assembly structure cooperation, can make the clamping block assembly that receives the reaction too much stop displacement, and the clamping block assembly that the rest does not contact workpiece continues displacement, thereby can make the device can be self -adaptive different shape processing spare, avoid to cause the damage to processing spare.

Description

Technical Field

[0001] This utility model relates to the technical field of five-axis machine tool components, and more specifically to an adaptive fixture base for a five-axis linkage CNC machining center. Background Technology

[0002] A five-axis CNC machining center is a high-end CNC machining equipment that integrates computer control, high-performance servo drives, and precision mechanical structures. The equipment has five coordinate axes: typically three linear motion axes (X, Y, and Z axes) and two rotary motion axes (A and C axes). These five axes can move simultaneously and collaboratively under the precise control of a computer numerical control (CNC) system, enabling complex relative motion trajectories between the tool and the workpiece. The fixture base is usually located on the rotary C-axis and is used to fix the workpiece in place.

[0003] Traditional fixture bases have shortcomings in practical applications. For example, when faced with workpieces of various shapes and complex structures, especially products with irregular shapes, traditional fixture bases are difficult to adaptively adjust according to the product shape, and the clamping surface is difficult to fit tightly against the product surface. This results in uneven force at the clamping points, which can easily cause product deformation during processing, seriously affecting processing accuracy and product qualification rate. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides an adaptive fixture base for a five-axis linkage CNC machining center, so as to solve the problem that the traditional fixture base in the above-mentioned background art cannot adapt to the shape of the workpiece.

[0005] This utility model provides the following technical solution: an adaptive fixture base for a five-axis linkage CNC machining center, including a workpiece table, a bottom shell fixedly installed at the bottom of the workpiece table, a motor installed inside the bottom shell, a circular opening at the top of the workpiece table, and several sliding grooves at the top of the workpiece table, each of which is provided with an elastic threaded shaft assembly. A clamping block assembly is threadedly connected to the side wall of the elastic threaded shaft assembly. A rotary transmission mechanism is provided in a through hole at the top of the workpiece table, and the rotary transmission mechanism is provided with several output ends, each of which extends into one of the several sliding grooves. The several output ends of the rotary transmission mechanism are respectively connected to the several elastic threaded shaft assemblies through several opening and closing coupling assemblies. The motor output end passes through the circular opening and connects with the rotary transmission mechanism. A cover plate is installed in the circular opening at the top of the workpiece table.

[0006] Furthermore, the clamping block assembly includes a slider, which is threaded onto the side wall of the elastic threaded shaft assembly. An electric cylinder is fixedly connected to the top of the slider, and a clamping head is fixedly connected to the output end of the electric cylinder.

[0007] Furthermore, the rotary transmission mechanism includes a driving bevel gear, several driven bevel gears, and several knobs. The top of the workpiece table has several rotating holes, which communicate with the interior of several sliding grooves on the top of the workpiece table. The driving bevel gear is rotatably sleeved in the top hole of the workpiece table. Several driven bevel gears mesh with the driving bevel gear. The inner ends of several knobs are fixedly connected to several driven bevel gears. The outer ends of several driven bevel gears are connected to several opening and closing coupling assemblies. The motor output shaft is fixedly installed with the driving bevel gear. Several knobs are rotatably sleeved in several rotating holes.

[0008] Furthermore, the opening and closing coupling assembly includes a cylindrical shell and a transmission column. The cylindrical shell has a shaft hole inside, and a spline groove is formed at the positive end of the shaft hole. One end of the transmission column passes through the back end of the cylindrical shell and enters the shaft hole, connecting to a spline end. The spline end enters the spline groove. The other end of the transmission column is connected to the output end of the rotary transmission mechanism, and the positive end of the cylindrical shell is connected to the elastic threaded shaft assembly.

[0009] Furthermore, the elastic threaded shaft assembly includes a main threaded shaft, a movable ring, a second knob, and a spring. Each of the several sliding grooves on the top of the workpiece table has a column hole at the end away from the circular opening. The movable ring slides within the column hole, and the second knob rotates within the inner cavity of the movable ring. One end of the second knob is fixedly connected to the end face of the main threaded shaft, and the end of the movable ring away from the main threaded shaft is connected to the inner wall of the column hole via a spring.

[0010] Furthermore, the moving ring sidewall is provided with a positioning protrusion, and the inner wall of the column hole at one end of the workpiece table slide groove is provided with a positioning groove, and the positioning protrusion is slidably sleeved in the positioning groove.

[0011] Furthermore, an electrical connection assembly is installed in the top slide groove of the workpiece stage. The electrical connection assembly includes positive and negative electrodes and electrical contacts. The positive and negative electrodes are fixedly connected to the inner wall of the slide groove. One end of the positive and negative electrodes is electrically connected to an electrical terminal. The electrical contacts are in contact with the positive and negative electrodes. The electrical contacts are fixedly installed on the outer wall of the clamping block assembly through a fixing plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] This invention uses the rotation of several elastic threaded shaft assemblies to drive several clamping block assemblies to move towards the center of the workpiece table, thereby clamping the placed workpiece. When dealing with irregularly shaped workpieces, some clamping block assemblies will first come into contact with the workpiece and receive a certain reaction force. By setting an opening and closing coupling assembly in conjunction with the elastic threaded shaft assembly structure, the clamping block assemblies that have received excessive reaction force can stop moving, while the remaining clamping block assemblies that have not yet come into contact with the workpiece will continue to move until they come into contact with the workpiece and stop. This allows the device to adapt to workpieces of different shapes and avoid damage to the workpieces. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A frontal cross-sectional view of the bottom shell of the middle section;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 This utility model Figure 3 A schematic diagram of the rotary transmission mechanism in the diagram;

[0018] Figure 5 This utility model Figure 3 A schematic cross-sectional view of the opening and closing coupling assembly in the diagram.

[0019] Figure 6 This utility model Figure 3 A schematic diagram of the elastic threaded shaft assembly structure in the diagram;

[0020] Figure 7 This utility model Figure 6 A schematic diagram of the power connection components.

[0021] The attached figures are labeled as follows: 1. Workpiece stage; 2. Bottom shell; 3. Motor; 4. Rotary transmission mechanism; 5. Elastic threaded shaft assembly; 6. Opening and closing coupling assembly; 7. Clamping block assembly; 8. Cover plate; 9. Electrical connection assembly; 71. Slider; 72. Electric cylinder; 73. Clamping head; 41. Driving bevel gear; 42. Driven bevel gear; 43. Knob one; 61. Cylinder shell; 62. Shaft hole; 63. Spline groove; 64. Spline end; 65. Transmission column; 51. Main threaded shaft; 52. Moving ring; 53. Knob two; 54. Spring; 55. Positioning protrusion; 91. Positive and negative electrode plates; 92. Electrical connection end; 93. Fixing plate; 94. Electrical contact. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] Reference Figure 1 and Figure 2 , 3This utility model provides an adaptive fixture base for a five-axis linkage CNC machining center, including a workpiece table 1, a bottom shell 2 fixedly installed at the bottom of the workpiece table 1, a motor 3 installed inside the bottom shell 2, a circular opening at the top of the workpiece table 1, and several sliding grooves at the top of the workpiece table 1. Each of the several sliding grooves is provided with an elastic threaded shaft assembly 5, and a clamping block assembly 7 is threadedly connected to the side wall of the elastic threaded shaft assembly 5. A rotary transmission mechanism 4 is provided in the through hole at the top of the workpiece table 1. The rotary transmission mechanism 4 is provided with several output ends, which extend into the several sliding grooves respectively. The several output ends of the rotary transmission mechanism 4 are respectively connected to the several elastic threaded shaft assemblies 5 through several opening and closing coupling assemblies 6. The output end of the motor 3 passes through the circular opening and is connected to the rotary transmission mechanism 4. A cover plate 8 is installed in the circular opening at the top of the workpiece table 1.

[0024] During use, the workpiece is placed on top of the workpiece table 1. The motor 3 outputs rotational force, and through the rotational transmission mechanism 4 and the connection relationship of the opening and closing coupling assembly 6, several elastic threaded shaft assemblies 5 can rotate. Under the action of the threaded structure, several clamping block assemblies 7 are displaced towards the center and approach the workpiece. When the workpiece is irregular in shape, some clamping block assemblies 7 will contact the workpiece first. At this time, the workpiece will give the clamping block assemblies 7 a reaction force, and the elastic threaded shaft assemblies 5 will have axial thrust. When the reaction force on the clamping block assemblies 7 is too large, it will drive the elastic threaded shaft assemblies 5 to undergo axial displacement, causing the opening and closing coupling assembly 6 to be subjected to axial tension and disconnect the connection. At this time, the rotational transmission effect of the rotational transmission mechanism 4 cannot be transmitted to the elastic threaded shaft assemblies 5. This can stop the displacement of some clamping block assemblies 7, while the remaining clamping block assemblies 7 continue to move until they contact the workpiece, thereby making the fixture base self-adaptive.

[0025] Reference Figure 2 The clamping block assembly 7 includes a slider 71, which is threaded onto the side wall of the elastic threaded shaft assembly 5. An electric cylinder 72 is fixedly connected to the top of the slider 71, and a clamping head 73 is fixedly connected to the output end of the electric cylinder 72.

[0026] Because the opening and closing coupling assembly 6 breaks down after being subjected to force, the traditional clamping block assembly 7 cannot provide sufficient pressure to the workpiece to ensure the clamping force of the several clamping block assemblies 7 on the workpiece. At this time, the output of the electric cylinder 72 drives the clamping head 73 to move and apply pressure to the workpiece, thereby supplementing the clamping force of the several clamping block assemblies 7 on the workpiece.

[0027] Reference Figure 4The rotary transmission mechanism 4 includes a driving bevel gear 41, several driven bevel gears 42, and several knobs 43. The top of the workpiece table 1 has several rotating holes, which are connected to the interior of several sliding grooves on the top of the workpiece table 1. The driving bevel gear 41 is rotated and sleeved in the top hole of the workpiece table 1. Several driven bevel gears 42 mesh with the driving bevel gear 41. The inner ends of several knobs 43 are fixedly connected to several driven bevel gears 42. The outer ends of several driven bevel gears 42 are connected to several opening and closing coupling assemblies 6. The output shaft of the motor 3 is fixedly installed with the driving bevel gear 41. Several knobs 43 are rotated and sleeved in several rotating holes.

[0028] The rotary transmission mechanism 4 outputs rotational power to drive the active bevel gear 41 to rotate. Through the meshing relationship between the active bevel gear 41 and several passive bevel gears 42, several passive bevel gears 42 can rotate simultaneously. Under the connection effect of the knob 43, several opening and closing coupling assemblies 6 can be rotated.

[0029] Reference Figure 5 The opening and closing coupling assembly 6 includes a cylindrical shell 61 and a transmission column 65. The cylindrical shell 61 has a shaft hole 62 inside, and a spline groove 63 is formed at the positive end of the shaft hole 62. One end of the transmission column 65 passes through the back end of the cylindrical shell 61 and enters the shaft hole 62, and is connected to a spline end 64. The spline end 64 enters the spline groove 63. The other end of the transmission column 65 is connected to the output end of the rotary transmission mechanism 4. The positive end of the cylindrical shell 61 is connected to the elastic threaded shaft assembly 5.

[0030] In use, the rotational force is transmitted to the transmission column 65 through the rotary transmission mechanism 4. Through the cooperation between the spline end 64 and the spline groove 63, the rotational force of the transmission column 65 can be transmitted to the cylindrical shell 61, which in turn can drive the elastic threaded shaft assembly 5 to rotate. When the elastic threaded shaft assembly 5 is displaced, it will exert a pulling force on the cylindrical shell 61, causing the cylindrical shell 61 to follow the displacement of the elastic threaded shaft assembly 5. At this time, the spline end 64 separates from the spline groove 63, which can achieve the disconnection effect of the opening and closing coupling assembly 6. At this time, the rotational force output by the rotary transmission mechanism 4 is not transmitted by the opening and closing coupling assembly 6. When the elastic threaded shaft assembly 5 is not subjected to axial force, it will automatically reset according to its elastic effect, which can allow the spline end 64 to re-enter the spline groove 63, ensuring the transmission effect of the opening and closing coupling assembly 6.

[0031] Reference Figure 6 The elastic threaded shaft assembly 5 includes a main threaded shaft 51, a moving ring 52, a second knob 53, and a spring 54. Several grooves on the top of the workpiece table 1 are provided with a column hole at the end away from the circular opening. The moving ring 52 is slidably sleeved in the column hole, and the second knob 53 is rotatedly sleeved in the inner cavity of the moving ring 52. One end of the second knob 53 is fixedly connected to the end face of the main threaded shaft 51, and the end of the moving ring 52 away from the main threaded shaft 51 is connected to the inner wall of the column hole through the spring 54.

[0032] When the elastic threaded shaft assembly 5 receives axial pressure, the main threaded shaft 51 is displaced. The main threaded shaft 51 drives the knob 53 to move, and the knob 53 drives the moving ring 52 to move, compressing the spring 54. When the axial pressure of the elastic threaded shaft assembly 5 disappears, the elastic force of the spring 54 can reset the main threaded shaft 51.

[0033] Reference Figure 6 The moving ring 52 has a positioning protrusion 55 on its side wall, and the inner wall of the column hole at one end of the slide groove of the workpiece table 1 has a positioning groove, and the positioning protrusion 55 slides in the positioning groove.

[0034] This setting prevents the rotating ring 52 from affecting the spring 54.

[0035] Reference Figure 6 , 7 A power connection assembly 9 is installed in the top slide groove of the workpiece table 1. The power connection assembly 9 includes positive and negative electrode plates 91 and power connection contacts 94. The positive and negative electrode plates 91 are fixedly connected to the inner wall of the slide groove. One end of the positive and negative electrode plates 91 is electrically connected to a power connection terminal 92. The power connection contact 94 contacts the positive and negative electrode plates 91. The power connection contact 94 is fixedly installed on the outer wall of the clamping block assembly 7 through a fixing plate 93.

[0036] This configuration facilitates the connection of the clamping block assembly 7 to power. Wiring is performed through the power connection terminal 92, and electrical conductivity is achieved through contact between the positive and negative electrode plates 91 and the power connection contact 94. When the clamping block assembly 7 is displaced, the power connection contact 94 slides along the side wall of the positive and negative electrode plates 91.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. This utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adaptive fixture base for a five-axis linkage CNC machining center, characterized in that: The workpiece includes a workpiece table (1), a bottom shell (2) is fixedly installed on the bottom of the workpiece table (1), a motor (3) is installed inside the bottom shell (2), a round opening is opened on the top of the workpiece table (1), a number of sliding grooves are opened on the top of the workpiece table (1), and an elastic threaded shaft assembly (5) is provided in each of the sliding grooves. A clamping block assembly (7) is threadedly connected to the side wall of the elastic threaded shaft assembly (5). A rotary transmission mechanism (4) is provided in the through hole on the top of the workpiece table (1). The rotary transmission mechanism (4) is provided with a number of output ends, which extend into the sliding grooves respectively. The output ends of the rotary transmission mechanism (4) are respectively connected to the elastic threaded shaft assembly (5) through a number of opening and closing coupling assemblies (6). The output end of the motor (3) passes through the round opening and is connected to the rotary transmission mechanism (4). A cover plate (8) is installed in the round opening on the top of the workpiece table (1).

2. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 1, characterized in that: The clamping block assembly (7) includes a slider (71), which is threaded onto the side wall of the elastic threaded shaft assembly (5). An electric cylinder (72) is fixedly connected to the top of the slider (71), and a clamping head (73) is fixedly connected to the output end of the electric cylinder (72).

3. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 1, characterized in that: The rotary transmission mechanism (4) includes an active bevel gear (41), several passive bevel gears (42), and several knobs (43). The workpiece table (1) has several rotating holes at the top round opening, which are connected to several sliding grooves at the top of the workpiece table (1). The active bevel gear (41) is rotated and sleeved in the round hole at the top of the workpiece table (1). Several passive bevel gears (42) mesh with the active bevel gear (41). The inner ends of several knobs (43) are fixedly connected to several passive bevel gears (42). The outer ends of several passive bevel gears (42) are connected to several open and close coupling assemblies (6). The output shaft of the motor (3) is fixedly installed with the active bevel gear (41). Several knobs (43) are rotated and sleeved in several rotating holes.

4. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 1, characterized in that: The opening and closing coupling assembly (6) includes a cylindrical shell (61) and a transmission column (65). The cylindrical shell (61) has a shaft hole (62) inside. The shaft hole (62) has a spline groove (63) at the positive end. One end of the transmission column (65) passes through the back end of the cylindrical shell (61) and enters the shaft hole (62) to connect to a spline end (64). The spline end (64) enters the spline groove (63). The other end of the transmission column (65) is connected to the output end of the rotary transmission mechanism (4). The positive end of the cylindrical shell (61) is connected to the elastic threaded shaft assembly (5).

5. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 1, characterized in that: The elastic threaded shaft assembly (5) includes a main threaded shaft (51), a moving ring (52), a second knob (53), and a spring (54). The top of the workpiece table (1) has several grooves with a column hole at the end away from the round opening. The moving ring (52) is slidably sleeved in the column hole. The second knob (53) is rotated sleeved in the inner cavity of the moving ring (52). One end of the second knob (53) is fixedly connected to the end face of the main threaded shaft (51). The end of the moving ring (52) away from the main threaded shaft (51) is connected to the inner wall of the column hole through the spring (54).

6. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 5, characterized in that: The moving ring (52) has a positioning protrusion (55) on its side wall, and the workpiece table (1) has a positioning groove on the inner wall of the column hole at one end of the slide groove. The positioning protrusion (55) slides in the positioning groove.

7. The adaptive fixture base for a five-axis linkage CNC machining center according to claim 1, characterized in that: A power connection assembly (9) is installed in the top slide groove of the workpiece stage (1). The power connection assembly (9) includes positive and negative electrode plates (91) and power connection contacts (94). The positive and negative electrode plates (91) are fixedly connected to the inner wall of the slide groove. One end of the positive and negative electrode plates (91) is electrically connected to a power connection terminal (92). The power connection contacts (94) are in contact with the positive and negative electrode plates (91). The power connection contacts (94) are fixedly installed on the outer wall of the clamping block assembly (7) through a fixing plate (93).

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