Clamping device for numerical control machine tool

Abstract

The utility model relates to the field of machine tool machining, and discloses a clamping device for a numerical control machine tool, which comprises a first-stage base and a hydraulic machine arranged on the first-stage base, a second-stage base is arranged above the hydraulic machine, the second-stage base is provided with a cylindrical clamping mechanism, the cylindrical clamping mechanism is embedded with a third-stage base, and the third-stage base is provided with a clamping groove. The third-stage base is provided with an outer side clamping mechanism; an outer side clamping mechanism is arranged to clamp a workpiece of a solid structure, an outer side clamping plate is used for clamping the outer side of the workpiece, a silica gel pad can play a buffering role to avoid workpiece damage caused by rigid clamping, the contact area is increased when the irregular workpiece is clamped, friction force is increased, and clamping is more stable; the cylindrical clamping mechanism is arranged, when a workpiece is in a cylindrical shell shape, the inner wall of the cylindrical workpiece is clamped through inner side clamping columns, and therefore the situation that the cylindrical workpiece is deformed due to the fact that too large clamping force is applied to the outer side is avoided, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of machine tool processing, in particular to a clamping device for a numerically controlled machine tool. Background Art

[0002] CNC machine tools are short for digitally controlled machine tools. They are automated machine tools equipped with a program control system. Existing CNC machine tools require parts to be fixed by clamping devices during use to improve the stability of the parts. However, when using general clamping devices, parts need to be placed on the clamping devices manually, which poses a great safety hazard. At the same time, general clamping devices directly clamp and fix parts rigidly, so parts are easily squeezed and damaged, which can easily affect the quality of parts.

[0003] According to a clamping device for a CNC machine tool provided with patent application number CN202121061294.0, it comprises a workbench, mounting plates are symmetrically provided on both sides of the upper end of the workbench, electric push rods are provided on the opposite sides of the mounting plates on both sides, and fixed plates are provided at the output ends of the electric push rods, a feeding assembly and a buffer assembly are provided on the workbench, the feeding assembly is arranged on the upper end of the workbench, and the buffer assembly is arranged on the fixed plates on both sides. The utility model can enable the fixed plate to drive the pallet to push the parts upward to between the fixed plates on both sides while clamping the parts, so that the workers only need to place the parts on the pallet to enable the device to automatically load and clamp the parts, and there is no need to manually place the parts between the two fixed plates, thereby ensuring the safety of the workers, and the device can buffer the force of the fixed plate squeezing the parts through a plurality of springs, thereby avoiding the fixed plate directly rigidly squeezing the parts to cause damage to the parts, thereby ensuring the quality of the parts.

[0004] There are still some shortcomings in the patent application. The structural design of the patent is reasonable, but the clamping tool of the patent has limitations. When clamping the cylindrical shell workpiece, the force is relatively single and it cannot clamp in two directions. When the tool of the CNC machine tool applies force to the workpiece, the workpiece is easy to fall over and its stability is low. Therefore, a clamping device for CNC machine tools is needed to solve these problems. Utility Model Content

[0005] A clamping device for a CNC machine tool comprises a primary base and a hydraulic press arranged on the primary base, a secondary base is arranged above the hydraulic press, a cylindrical clamping mechanism is installed on the secondary base, the cylindrical clamping mechanism is embedded in a third-level base, and an outer clamping mechanism is installed on the third-level base.

[0006] Preferably, a plurality of support columns are provided on the first-level base, and the support columns are connected to two sides of the third-level base. The hydraulic press is provided with a hydraulic shaft, and the hydraulic shaft is connected to the bottom of the second-level base.

[0007] Preferably, the secondary base is provided with a secondary slide groove, the secondary slide groove engages a slide plate, the slide plate is provided with a spiral hole, the upper end of the slide plate is connected to an inner clamping column, and a silicone friction pad is installed on the inner clamping column.

[0008] Preferably, the spiral hole is engaged with a bidirectional spiral rod, a spiral gear is provided in the middle of the bidirectional spiral rod, the spiral gear is engaged with a motor gear, and the motor gear is connected to the motor.

[0009] Preferably, a lifting through hole is provided in the middle of the three-level base, the lifting through hole is engaged with the inner clamping column, and three-level sliding grooves are provided on both sides of the lifting through hole, and the three-level sliding grooves are engaged with two outer clamping plates.

[0010] Preferably, the outer clamping mechanism comprises a clamping motor, the clamping motor is fixed on a bottom plate, the bottom plate is connected to the three-stage base, and the clamping motor is installed with a spiral rod.

[0011] Preferably, the outer clamping plate is provided with a clamping plate spiral hole, the clamping plate spiral hole is engaged with a spiral rod, the lower end of the outer clamping plate is provided with a sliding rod, the sliding rod is engaged with a three-stage sliding groove, and a silicone pad is provided on the side of the outer clamping plate.

[0012] Beneficial effects: The new type is equipped with an outer clamping mechanism to clamp the workpiece with a solid structure, that is, the clamping motor on the three-level base is started to drive the spiral rod to rotate, and the spiral rod acts on the spiral hole of the clamping plate. The spiral force is used to push the outer clamping plates on both sides to slide toward the middle in the three-level slide groove to clamp the workpiece on the outside. The silicone pad can act as a buffer to avoid damage to the workpiece caused by hard clamping, and increase the contact area when clamping irregular workpieces, increase the friction force, and make the clamping more stable; the new type is equipped with a cylindrical clamping mechanism. When the workpiece is in the shape of a cylindrical shell, it can be started The hydraulic press lifts the secondary base to allow the inner clamping column to enter the interior of the cylindrical workpiece. The starting motor drives the motor gear to rotate, and the motor gear drives the helical gear to rotate. The helical gear rotates the bidirectional screw rod, and the bidirectional screw rod acts on the spiral holes on both sides. Since the threads on both sides of the bidirectional screw rod are in opposite directions, the slides on both sides can be driven away from each other by the spiral force, thereby driving the inner clamping column to clamp the inner wall of the cylindrical workpiece. The silicone friction pad can increase the friction, thereby avoiding deformation of the cylindrical workpiece caused by excessive clamping force on the outside, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

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

[0015] Figure 2 This is a schematic diagram of the structure of the cylindrical clamping mechanism of the utility model;

[0016] Figure 3 It is a partial structural schematic diagram of the outer clamping mechanism of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the outer clamping plate of the utility model.

[0018] Legend:

[0019] 1. First-level base; 2. Hydraulic press; 3. Second-level base; 4. Cylindrical clamping mechanism; 5. Third-level base; 6. Outer clamping mechanism; 11. Support column; 21. Hydraulic shaft; 31. Second-level slide; 32. Slide plate; 33. Spiral hole; 34. Inner clamping column; 35. Silicone friction pad; 41. Bidirectional spiral rod; 42. Spiral gear; 43. Motor gear; 44. Motor; 51. Lifting through hole; 52. Third-level slide; 61. Clamping motor; 62. Bottom plate; 63. Spiral rod; 64. Outer clamping plate; 641. Clamping plate spiral hole; 65. Sliding rod; 66. Silicone pad. DETAILED DESCRIPTION

[0020] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0021] Example 1

[0022] See also Figure 1 to Figure 2Embodiment 1 is described, a clamping device for a CNC machine tool comprises a primary base 1 and a hydraulic press 2 arranged on the primary base 1, a secondary base 3 is arranged above the hydraulic press 2, a cylindrical clamping mechanism 4 is installed on the secondary base 3, a plurality of support columns 11 are arranged on the primary base 1, the support columns 11 are connected to both sides of the tertiary base 5, the hydraulic press 2 is provided with a hydraulic shaft 21, the hydraulic shaft 21 is connected to the bottom of the secondary base 3, the secondary base 3 is provided with a secondary slide 31, the secondary slide 31 is engaged with a slide plate 32, the slide plate 32 is provided with a spiral hole 33, the upper end of the slide plate 32 is connected to an inner clamping column 34, a silicone friction pad 35 is installed on the inner clamping column 34, the spiral hole 33 is engaged with a bidirectional screw rod 41, a spiral gear 42 is provided in the middle of the bidirectional screw rod 41, the spiral gear 42 is engaged with a motor gear 43, and the motor gear 43 is connected to a motor 44.

[0023] In this embodiment, the hydraulic press 2 can lift the secondary base 3, drive the inner clamping column 34 to enter the interior of the cylindrical workpiece, start the motor 44 to drive the motor gear 43 to rotate, the motor gear 43 drives the helical gear 42 to rotate, and the helical gear 42 causes the bidirectional screw rod 41 to rotate. The bidirectional screw rod 41 acts on the spiral holes 33 on both sides. Since the threads on both sides of the bidirectional screw rod 41 are in opposite directions, the slides 32 on both sides can be driven away from each other by the spiral force, thereby driving the inner clamping column 34 to clamp the inner wall of the cylindrical workpiece. The silicone friction pad 35 can increase the friction force, thereby avoiding the deformation of the cylindrical workpiece by applying too much clamping force on the outside, thereby improving the practicality of the device.

[0024] Example 2

[0025] See also Figure 3 to Figure 4 Description of Example 2. This embodiment further describes Example 1. The cylindrical clamping mechanism 4 is embedded in the three-level base 5. The three-level base 5 is equipped with an outer clamping mechanism 6. A lifting through hole 51 is provided in the middle of the three-level base 5. The lifting through hole 51 is embedded in the inner clamping column 34. Three-level slide grooves 52 are provided on both sides of the lifting through hole 51. The three-level slide grooves 52 are embedded in two outer clamping plates 64. The outer clamping mechanism 6 includes a clamping motor 61. The clamping motor 61 is fixed on a bottom plate 62. The bottom plate 62 is connected to the three-level base 5. The clamping motor 61 is equipped with a screw rod 63. The outer clamping plate 64 is provided with a clamping plate spiral hole 641. The clamping plate spiral hole 641 is embedded with the screw rod 63. A sliding rod 65 is provided at the lower end of the outer clamping plate 64. The sliding rod 65 is embedded in the three-level slide groove 52. A silicone pad 66 is provided on the side of the outer clamping plate 64.

[0026] In this embodiment, the clamping motor 61 can drive the screw rod 63 to rotate, and the screw rod 63 acts on the screw hole 641 of the clamping plate. The spiral force is used to push the outer clamping plates 64 on both sides to slide toward the middle in the three-level slide groove 52 to clamp the workpiece on the outside. The silicone pad 66 can act as a buffer to avoid damage to the workpiece caused by hard clamping, and increase the contact area when clamping irregular workpieces, thereby increasing the friction and making the clamping more stable.

[0027] In specific applications, firstly, the workpiece is placed between the outer clamping plates 64 on the three-level base 5, and the clamping mechanism is selected according to the shape of the workpiece. When the workpiece is solid, the clamping motor 61 is started to drive the screw rod 63 to rotate, and the screw rod 63 acts on the screw hole 641 of the clamping plate. The outer clamping plates 64 on both sides are pushed to slide toward the middle in the three-level slide groove 52 by the spiral force to clamp the workpiece from the outside. The silicone pad 66 can play a buffering role to avoid damage to the workpiece caused by hard clamping, and increase the contact area when clamping irregular workpieces, increase the friction force, and make the clamping more stable. When the workpiece is a cylindrical structure, the workpiece is first clamped from the outside as above. Restart the hydraulic press 2 to lift the secondary base 3, drive the inner clamping column 34 to enter the interior of the cylindrical workpiece, start the motor 44 to drive the motor gear 43 to rotate, the motor gear 43 drives the helical gear 42 to rotate, the helical gear 42 causes the bidirectional screw rod 41 to rotate, the bidirectional screw rod 41 acts on the spiral holes 33 embedded on both sides, because the threads on both sides of the bidirectional screw rod 41 are in opposite directions, the slides 32 on both sides can be driven away from each other by the spiral force, thereby driving the inner clamping column 34 to clamp the inner wall of the cylindrical workpiece, the silicone friction pad 35 can increase the friction force, thereby avoiding deformation of the cylindrical workpiece caused by applying too much clamping force only on the outside, thereby improving the practicability of the device.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A clamping device for a CNC machine tool, comprising a primary base (1) and a hydraulic press (2) arranged on the primary base (1), characterized in that: A secondary base (3) is provided above the hydraulic press (2), the secondary base (3) is equipped with a cylindrical clamping mechanism (4), the cylindrical clamping mechanism (4) is engaged with a tertiary base (5), and the tertiary base (5) is equipped with an outer clamping mechanism (6).

2. A clamping device for a CNC machine tool according to claim 1, characterized in that: The first-level base (1) is provided with a plurality of support columns (11), the support columns (11) are connected to two sides of the third-level base (5), and the hydraulic press (2) is provided with a hydraulic shaft (21), and the hydraulic shaft (21) is connected to the bottom of the second-level base (3).

3. A clamping device for a CNC machine tool according to claim 1, characterized in that The secondary base (3) is provided with a secondary slide groove (31), the secondary slide groove (31) is engaged with a slide plate (32), the slide plate (32) is provided with a spiral hole (33), the upper end of the slide plate (32) is connected to an inner clamping column (34), and a silicone friction pad (35) is installed on the inner clamping column (34).

4. A clamping device for a CNC machine tool according to claim 3, characterized in that: The spiral hole (33) engages with a bidirectional spiral rod (41), a spiral gear (42) is provided in the middle of the bidirectional spiral rod (41), the spiral gear (42) engages with a motor gear (43), and the motor gear (43) is connected to a motor (44).

5. A clamping device for a CNC machine tool according to claim 4, characterized in that: A lifting through hole (51) is provided in the middle of the three-level base (5), and the lifting through hole (51) is engaged with the inner clamping column (34). Three-level sliding grooves (52) are provided on both sides of the lifting through hole (51), and the three-level sliding grooves (52) are engaged with two outer clamping plates (64).

6. The clamping device for a CNC machine tool according to claim 1, characterized in that: The outer clamping mechanism (6) comprises a clamping motor (61), the clamping motor (61) is fixed on a bottom plate (62), the bottom plate (62) is connected to the three-stage base (5), and the clamping motor (61) is installed with a screw rod (63).

7. The clamping device for a CNC machine tool according to claim 5, characterized in that: The outer clamping plate (64) is provided with a clamping plate spiral hole (641), and the clamping plate spiral hole (641) is engaged with a spiral rod (63). The lower end of the outer clamping plate (64) is provided with a sliding rod (65), and the sliding rod (65) is engaged with a three-level sliding groove (52). The side of the outer clamping plate (64) is provided with a silicone pad (66).

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