Five-axis machining center clamping jig

Abstract

The five-axis machining center clamping jig comprises a mounting plate, a servo motor a is mounted at the front end of the mounting plate, the output end of the servo motor a is connected with a two-way lead screw, the outer side of the two-way lead screw is in threaded connection with a moving block, a limiting rod penetrates through the end of the moving block, and the end of the limiting rod is connected with the mounting plate. A mounting seat is mounted at the upper end of the moving block; a servo motor b is mounted at the end of the mounting base, and the output end of the servo motor b is connected with a threaded rod. According to the five-axis machining center clamping jig, the mounting base is controlled to move, the adjusting plate can be driven to move, the distance between the rubber strips is shortened, when the rubber strips make contact with the irregular face of a workpiece, the irregular face of the workpiece can push the rubber strips, different positions of the rubber strips are stressed differently, and therefore the supporting rod can be driven to move by different distances, and the machining precision is improved. And the rubber strip adapts to the irregular surface of the workpiece and is attached to the irregular surface, and the positioning assembly is used in cooperation for locking the irregular surface.

Description

Technical Field

[0001] The invention relates to the technical field of five-axis machining center fixtures, in particular to a five-axis machining center clamping fixture. Background Art

[0002] A five-axis machining center is a device that adds two rotating axes to an ordinary machining center. It is a high-tech, high-precision machining center specially used for machining complex curved surfaces. It is mostly used in aviation, aerospace, military, scientific research and other fields. It is also widely used in civilian fields such as wood mold manufacturing, bathroom trimming, and automotive interior processing. When using a five-axis machining center for processing, it is necessary to use a clamping fixture to fix the workpiece so that the workpiece can be processed stably.

[0003] The current clamping fixture has a high clamping tightness for workpieces with higher flatness. However, five-axis machining centers are mostly used for processing complex surface workpieces, which is not conducive to closely fitting the workpiece's special-shaped surface with its adaptability. The clamping tightness and applicability of the workpiece are low. Therefore, we proposed a five-axis machining center clamping fixture to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a five-axis machining center clamping fixture to solve the problems raised by the above background technology that the current market is not conducive to close fit with the workpiece's special-shaped surface and adaptability, and has low clamping tightness and applicability for the workpiece.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a five-axis machining center clamping fixture, comprising a mounting plate, a servo motor a is mounted on the front end of the mounting plate, a bidirectional screw rod is connected to the output end of the servo motor a, a moving block is threadedly connected to the outer side of the bidirectional screw rod, an end of the moving block passes through a limit rod, an end of the limit rod is connected to the mounting plate, and a mounting seat is mounted on the upper end of the moving block;

[0006] A servo motor b is installed at the end of the mounting seat, a threaded rod is connected to the output end of the servo motor b, a slider is threadedly connected to the outer side of the threaded rod, a slide rod passes through the end of the slider, the end of the slide rod is connected to the mounting seat, and an adjustment block is installed on the upper end of the slider;

[0007] One end of the mounting seat is rotatably connected to a rotating shaft, an adjusting plate is installed on the upper end of the rotating shaft, a fixing plate is installed above the adjusting plate, the fixing plate is connected to a support rod through a first spring, a rubber strip is connected to the end of the support rod, a positioning hole is provided on the lower side of the support rod, and a positioning component is provided on the adjusting plate for reinforcing and locking the support rod so as to firmly clamp the workpiece.

[0008] Preferably, the positioning assembly includes a fixed seat installed below the adjustment plate, a first electromagnet is installed at the lower end of the fixed seat, a connecting plate is elastically connected to the adjustment plate through a second spring, a positioning rod is connected above the connecting plate, and a second electromagnet is installed below the connecting plate.

[0009] Preferably, the threads of the front and rear sections of the bidirectional screw are distributed in opposite directions, and the opposite ends of the threads of the bidirectional screw are threadedly connected with moving blocks.

[0010] Preferably, the moving block is slidably connected to the limiting rod, and the limiting rod is symmetrically distributed about the center line of the bidirectional screw rod.

[0011] Preferably, the sliding block is slidably connected to a sliding rod, and the sliding rod is symmetrically distributed along a center line that passes through the threaded rod.

[0012] Preferably, the contact surfaces of the adjustment block and the adjustment plate are both smooth and inclined, and the adjustment plate forms a rotating structure with the mounting seat via a rotating shaft.

[0013] Preferably, three support rods are connected to the rubber strip at equal intervals, the support rods slide through the fixing plate, and positioning holes are distributed at equal intervals on the lower side of the support rods.

[0014] Preferably, the position of the first electromagnet and the position of the second electromagnet are arranged to correspond to each other, and the first electromagnet and the second electromagnet are magnets of different polarities.

[0015] Preferably, the positioning rod slides through the fixing plate, and the positioning rod and the positioning hole engage with each other.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The clamping fixture of the five-axis machining center can drive the adjustment plate to move by controlling the movement of the mounting seat, thereby shortening the distance between the rubber strips. When the rubber strips contact the irregular surface of the workpiece, the irregular surface of the workpiece can push the rubber strips. The rubber strips are subjected to different forces at different positions, so the support rods can be driven to move different distances, so that the rubber strips can adapt to the irregular surface of the workpiece and fit therewith, and can be locked by using a positioning component to stabilize the clamping of irregular workpieces. The clamping of irregular workpieces can be applied not only to the tight clamping of flat workpieces but also to the tight clamping of irregular workpieces, thereby improving its practicality.

[0018] (2) The clamping fixture of the five-axis machining center can be moved by driving the adjustment block, and the driving adjustment plate can be rotated on the mounting seat through the rotating shaft to adjust the angle of the rubber strip so that the rubber strip can adapt to the arc-shaped irregular surface for clamping and fixing. This clamping fixture can also be used when the workpiece is an irregular shape with an arc surface state, thereby improving its flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side view structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting seat of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the moving block and the mounting seat of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection structure between the mounting seat and the rotating shaft of the present invention;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the fixing plate of the present invention;

[0026] Figure 8 This is a schematic diagram of the connection structure between the connecting plate and the second electromagnet of the present invention;

[0027] Fig. 9 It is a bottom view of the structure of the support rod of the present invention.

[0028] In the figure: 1. mounting plate; 2. servo motor a; 3. bidirectional lead screw; 4. moving block; 5. limit rod; 6. mounting seat; 7. servo motor b; 8. threaded rod; 9. slide rod; 10. slide block; 11. adjusting block; 12. rotating shaft; 13. adjusting plate; 14. support rod; 15. first spring; 16. rubber strip; 17. positioning hole; 18. fixing seat; 19. first electromagnet; 20. second spring; 21. connecting plate; 22. second electromagnet; 23. positioning rod; 24. fixing plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 9The present invention provides the following technical solution: a five-axis machining center clamping fixture, comprising a mounting plate 1, a servo motor a2 is mounted on the front end of the mounting plate 1, a bidirectional screw rod 3 is connected to the output end of the servo motor a2, a moving block 4 is threadedly connected to the outer side of the bidirectional screw rod 3, an end of the moving block 4 passes through a limit rod 5, an end of the limit rod 5 is connected to the mounting plate 1, and a mounting seat 6 is mounted on the upper end of the moving block 4;

[0031] Furthermore, the threads of the front and rear sections of the bidirectional screw rod 3 are distributed in opposite directions, and the opposite ends of the threads of the bidirectional screw rod 3 are threadedly connected with the moving blocks 4, and the rotation of the bidirectional screw rod 3 can be used to control the moving blocks 4 to move in opposite directions at the same time, thereby adjusting the distance between the mounting seats 6;

[0032] Furthermore, the moving block 4 is slidably connected to the limiting rod 5, and the limiting rod 5 is symmetrically distributed about the center line of the bidirectional screw rod 3. The limiting rod 5 can be used to support the moving block 4 to avoid that all the weight is carried on the bidirectional screw rod 3;

[0033] A servo motor b7 is installed at the end of the mounting seat 6, a threaded rod 8 is connected to the output end of the servo motor b7, a slider 10 is threadedly connected to the outer side of the threaded rod 8, a slider 9 is passed through the end of the slider 10, the end of the slider 9 is connected to the mounting seat 6, and an adjustment block 11 is installed at the upper end of the slider 10;

[0034] Furthermore, the slider 10 is slidably connected to the slide rod 9, and the slide rod 9 is symmetrically distributed through the center line of the threaded rod 8. The slide rod 9 can be used to support the slider 10 to avoid that all the weight is borne on the threaded rod 8;

[0035] One end of the mounting seat 6 is rotatably connected to a rotating shaft 12, an adjusting plate 13 is installed on the upper end of the rotating shaft 12, a fixing plate 24 is installed above the adjusting plate 13, the fixing plate 24 is connected to a supporting rod 14 through a first spring 15, a rubber strip 16 is connected to the end of the supporting rod 14, and a positioning hole 17 is opened on the lower side of the supporting rod 14;

[0036] Furthermore, the contact surfaces of the adjusting block 11 and the adjusting plate 13 are both smooth and inclined, and the adjusting plate 13 forms a rotating structure with the mounting seat 6 through the rotating shaft 12, which can reduce the friction between the adjusting block 11 and the adjusting plate 13, and the movement of the adjusting block 11 can push the adjusting plate 13 to rotate;

[0037] Furthermore, three support rods 14 are connected to the rubber strip 16 at equal intervals, and the support rods 14 slide through the fixing plate 24. Positioning holes 17 are evenly distributed on the lower side of the support rods 14, so that the support rods 14 can be moved under force, so that the rubber strip 16 can flexibly adapt to the irregular surface of the workpiece and fit it, so as to clamp and fix the workpiece;

[0038] The adjustment plate 13 is provided with a positioning assembly for reinforcing and locking the support rod 14 so as to firmly clamp the workpiece;

[0039] Further, the positioning assembly includes a fixing seat 18 installed below the adjustment plate 13, a first electromagnet 19 is installed at the lower end of the fixing seat 18, a connecting plate 21 is elastically connected to the adjustment plate 13 through a second spring 20, a positioning rod 23 is connected above the connecting plate 21, and a second electromagnet 22 is installed below the connecting plate 21;

[0040] Furthermore, the position of the first electromagnet 19 and the position of the second electromagnet 22 are arranged to correspond to each other, and the first electromagnet 19 and the second electromagnet 22 are magnets of different polarity. When the first electromagnet 19 and the second electromagnet 22 are powered on, the attraction between the magnets can be used to control the positioning rod 23 to move out of the positioning hole 17, thereby releasing the lock on the support rod 14;

[0041] Furthermore, the positioning rod 23 slides through the fixing plate 24, and the positioning rod 23 and the positioning hole 17 are engaged with each other to achieve smooth sliding of the positioning rod 23, and the positioning rod 23 and the positioning hole 17 are engaged to achieve locking of the support rod 14;

[0042] Specifically, if the workpiece is an irregular shape in a planar state, the adjusting plate 13 is moved so that the adjusting plate 13 rotates through the rotating shaft 12. Figure 1The position distribution shown in the figure, the workpiece is placed in the middle position of the mounting plate 1, and then the servo motor a2 can be powered on to control the servo motor a2 to rotate forward, thereby driving the bidirectional screw 3 connected to the output shaft to rotate, and the bidirectional screw 3 controls the relative movement of the moving block 4 connected to the outer thread, so that the moving block 4 drives the mounting seat 6 installed on the upper end to move relatively, and the mounting seat 6 drives the adjustment plate 13 set above to move, gradually shortening the distance between the symmetrically distributed rubber strips 16, so that the rubber strip 16 moves close to the workpiece, and at the same time the first electromagnet 19 and the first When the second electromagnet 22 is powered on, the first electromagnet 19 and the second electromagnet 22 with different poles attract each other, thereby pulling the connecting plate 21 downward, and the connecting plate 21 stretches and stores force on the second spring 20. At the same time, the connecting plate 21 drives the positioning rod 23 downward, and moves the positioning rod 23 out of the positioning hole 17, thereby releasing the lock on the support rod 14. When the rubber strip 16 contacts the irregular surface of the workpiece, the irregular surface of the workpiece can push the rubber strip 16. Different positions of the rubber strip 16 are subjected to different forces, so the support rod 14 can be driven to move. 14 stretches the first spring 15 to store force, and the moving distances of the support rods 14 at different positions are different, so that the rubber strip 16 adapts to the irregular surface of the workpiece and fits closely with it. After the clamping is completed, the servo motor a2 can be stopped, and the power supply of the first electromagnet 19 and the second electromagnet 22 is disconnected. At this time, the attraction between the electromagnets disappears, and the second spring 20 in the stored force state can control the positioning rod 23 to move up and reset, so that the positioning rod 23 is stuck in the positioning hole 17 at the corresponding position, and the support rod 14 is locked, thereby locking the rubber strip 16. The five-axis machining center can process the workpiece by fitting it with the workpiece and firmly clamping it. After the processing is completed, the servo motor a2 can be controlled to reverse, thereby controlling the bidirectional screw 3 to reverse, and then controlling the moving block 4 to drive the mounting seat 6 to move away from each other, thereby releasing the lock on the workpiece. At the same time, the first electromagnet 19 and the second electromagnet 22 are powered on, and the positioning rod 23 is controlled to move out of the positioning hole 17 to release the lock on the support rod 14. The first spring 15 in the stored force state can control the support rod 14 to reset and move, thereby restoring the rubber strip 16.

[0043] If the workpiece is an irregular shape in an arc surface state, according to the above steps, the servo motor a2 is controlled to rotate forward, thereby driving the bidirectional screw rod 3 connected to the output shaft to rotate, and the bidirectional screw rod 3 controls the relative movement of the moving block 4 connected to the outer thread, so that the moving block 4 drives the mounting seat 6 installed on the upper end to move relatively, and at the same time, the servo motor b7 is powered on, and the servo motor b7 is controlled to rotate forward, thereby controlling the forward rotation of the threaded rod 8 connected to the output end, and then controlling the movement of the slider 10 connected to the outer thread, and the slider 10 drives the adjusting block 11 installed on the upper end to move in the direction close to the fixed plate 24, and the adjusting block 11 pushes the symmetrically distributed adjusting plates 13, so that the adjusting plates 13 rotate on the mounting seat 6 through the rotating shaft 12, and the angle of the rubber strip 16 is adjusted to facilitate the clamping and fixing of the arc-shaped irregular surface. When the rubber strip 16 contacts the arc-shaped irregular surface of the workpiece, the irregular surface of the workpiece can push the rubber strip 16, and the rubber strip 16 is subjected to different forces at different positions, so the support rod 14 can be driven to move, and the support rod 14 is on the first The spring 15 is stretched and stored, and the moving distances of the support rod 14 at different positions are different, so that the rubber strip 16 can adapt to the irregular surface of the arc-shaped workpiece and fit closely with it. The power supply of the first electromagnet 19 and the second electromagnet 22 is disconnected. At this time, the attraction between the electromagnets disappears, and the second spring 20 in the stored force state can control the positioning rod 23 to move up and reset, so that the positioning rod 23 is stuck in the positioning hole 17 at the corresponding position, and the support rod 14 is locked, thereby locking the rubber strip 16 and the workpiece to fit, and stabilizing the clamping of the workpiece. Subsequently, according to the above steps, the moving block 4 is controlled to drive the mounting seat 6 to move away from each other to release the lock on the workpiece, and the servo motor b7 is controlled to reverse, so that the threaded rod 8 can be controlled to reverse, driving the slider 10 to drive the adjusting block 11 to move in the direction away from the fixed plate 24, releasing the push on the adjusting plate 13, and the adjusting plate 13 can be reset to facilitate the clamping and fixation of the next workpiece. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0044] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A five-axis machining center fixture, comprising a mounting plate (1), characterized in that: A servo motor a (2) is installed at the front end of the mounting plate (1); a bidirectional screw rod (3) is connected to the output end of the servo motor a (2); a moving block (4) is threadedly connected to the outer side of the bidirectional screw rod (3); an end of the moving block (4) passes through a limit rod (5); an end of the limit rod (5) is connected to the mounting plate (1); and a mounting seat (6) is installed at the upper end of the moving block (4); A servo motor b (7) is installed at the end of the mounting seat (6), a threaded rod (8) is connected to the output end of the servo motor b (7), a slider (10) is threadedly connected to the outer side of the threaded rod (8), a slide rod (9) passes through the end of the slider (10), the end of the slide rod (9) is connected to the mounting seat (6), and an adjustment block (11) is installed at the upper end of the slider (10); One end of the mounting seat (6) is rotatably connected to a rotating shaft (12), an adjusting plate (13) is installed on the upper end of the rotating shaft (12), a fixing plate (24) is installed above the adjusting plate (13), the fixing plate (24) is connected to a support rod (14) via a first spring (15), a rubber strip (16) is connected to the end of the support rod (14), a positioning hole (17) is provided on the lower side of the support rod (14), and a positioning component is provided on the adjusting plate (13) for reinforcing and locking the support rod (14) so ​​as to firmly clamp the workpiece.

2. The five-axis machining center clamping fixture according to claim 1 is characterized in that: The positioning assembly comprises a fixing seat (18) installed below the adjustment plate (13), a first electromagnet (19) is installed at the lower end of the fixing seat (18), a connecting plate (21) is elastically connected to the adjustment plate (13) via a second spring (20), a positioning rod (23) is connected above the connecting plate (21), and a second electromagnet (22) is installed below the connecting plate (21).

3. The five-axis machining center clamping fixture according to claim 1 is characterized in that: The threads of the front and rear sections of the bidirectional screw rod (3) are distributed in opposite directions, and the opposite ends of the threads of the bidirectional screw rod (3) are both threadedly connected to a moving block (4).

4. The five-axis machining center clamping fixture according to claim 1 is characterized in that: The moving block (4) is slidably connected to the limiting rod (5), and the limiting rod (5) is symmetrically distributed about the center line of the bidirectional screw rod (3).

5. The five-axis machining center clamping fixture according to claim 1 is characterized in that: The slide block (10) is slidably connected to the slide rod (9), and the slide rod (9) is symmetrically distributed along the center line of the threaded rod (8).

6. The five-axis machining center clamping fixture according to claim 1 is characterized in that: The contact surfaces of the adjustment block (11) and the adjustment plate (13) are both smooth and inclined, and the adjustment plate (13) forms a rotating structure with the mounting seat (6) via the rotating shaft (12).

7. The five-axis machining center clamping fixture according to claim 1 is characterized in that: Three support rods (14) are connected to the rubber strip (16) at equal intervals. The support rods (14) slide through the fixing plate (24). Positioning holes (17) are distributed at equal intervals on the lower side of the support rods (14).

8. The five-axis machining center clamping fixture according to claim 2 is characterized in that: The position of the first electromagnet (19) and the position of the second electromagnet (22) are arranged to correspond to each other, and the first electromagnet (19) and the second electromagnet (22) are magnets of different polarities.

9. The five-axis machining center clamping fixture according to claim 2, characterized in that: The positioning rod (23) slides through the fixing plate (24), and the positioning rod (23) and the positioning hole (17) are engaged with each other.

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