Workpiece clamping device for numerical control milling machine

Abstract

The utility model relates to the technical field of workpiece machining equipment, and discloses a workpiece clamping device for a numerical control milling machine, which comprises a placing table, two groups of clamping blocks are symmetrically and movably connected to the top of the placing table, a cavity is formed in the placing table, a two-way screw rod is rotatably connected to the interior of the cavity through a bearing, and the two-way screw rod is provided with a clamping block. Moving plates are in threaded connection with the exteriors of the two sides of the bidirectional lead screw, a support is arranged on one side of the clamping block, two sets of rolling wheels are symmetrically and rotationally connected to the support, two sets of vertical rods are symmetrically and fixedly connected to the bottom of the support, and the vertical rods are movably connected with the containing table; by means of the workpiece clamping and fixing device, the problems that due to workpiece clamping, operation is troublesome, the workpiece clamping and fixing efficiency is reduced, the surface of a workpiece can be shielded, and consequently the surface of the workpiece is inconvenient to machine are effectively solved.

Description

Technical Field

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

[0002] A CNC milling machine is an automated machine tool that utilizes computer numerical control (CNC) technology. It receives machining programs through a numerical control system, automatically controlling the movement of the machine's axes and the rotation of the tool, achieving precise machining of workpieces. Due to its high efficiency, high precision, and high reliability, it is widely used in machinery manufacturing, aerospace, automotive manufacturing, mold making, electronics manufacturing, and other fields. CNC milling machines typically require workpieces to be secured before machining, necessitating the use of specialized clamping devices.

[0003] In the Chinese utility model patent with the announcement number CN219254833U, a multi-workpiece clamping mechanism for milling machine processing is disclosed. The device drives the first stud to cooperate with the limit column to drive the clamping mechanism as a whole to move and adjust vertically, then rotates the second stud to drive the transmission plate to move horizontally, and finally rotates the screw to drive the pressure plate to press down to clamp and fix a corner of the workpiece. The dual-axis moving mechanism is used in conjunction with the movable slot to adjust the multiple positions of the clamping mechanism, and each position is controlled separately, so that the CNC milling machine can also be quickly adjusted when facing multi-specification workpieces, thereby improving the practicality of the overall device. With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0004] In actual use, this device requires adjusting the two sets of dual-axis moving mechanisms separately, and then adjusting the four sets of clamping mechanisms. This is not only troublesome and reduces the efficiency of clamping and fixing the workpiece, but the clamping mechanism also blocks the surface of the workpiece, making it inconvenient to process its surface. For this reason, we provide a workpiece clamping device for a CNC milling machine. Utility Model Content

[0005] In order to solve the problem in the above background technology that workpiece clamping is not only cumbersome to operate and reduces the clamping and fixing efficiency of the workpiece, but also blocks the workpiece surface, making it inconvenient to process the surface, the utility model provides a workpiece clamping device for a CNC milling machine.

[0006] The utility model adopts the following technical solutions: a workpiece clamping device for a CNC milling machine, comprising:

[0007] A placing table, the top of the placing table is symmetrically and movably connected with two groups of clamping blocks, a cavity is opened inside the placing table, the inside of the cavity is rotatably connected with a bidirectional screw rod through a bearing, the outside of both sides of the bidirectional screw rod is threadedly connected with a movable plate, a bracket is provided on one side of the clamping block, two groups of rollers are symmetrically and rotatably connected to the bracket, two groups of vertical rods are symmetrically and fixedly connected to the bottom of the bracket, and the vertical rods are movably connected to the placing table, and connecting rods are symmetrically hinged between the vertical rods and the movable plate on the same side through hinges.

[0008] As a further improvement of the above solution, the bottom of the clamping block is symmetrically fixedly connected to a guide block, and the top of the placement table is provided with a strip groove corresponding to the position of the guide block. The inside of the strip groove is fixedly connected to a guide rod and the guide rod and the guide block are slidably connected.

[0009] As a further improvement of the above solution, a spring is sleeved on the outside of the guide rod, and two ends of the spring are fixedly connected to the inner wall of the strip groove and the guide block respectively.

[0010] As a further improvement of the above solution, anti-slip pads are provided on the opposite surfaces of the two groups of clamping blocks.

[0011] As a further improvement of the above solution, the surface of the clamping block that contacts the roller is designed as an inclined surface.

[0012] As a further improvement of the above solution, guide members are symmetrically fixedly connected to both sides of the placement table, and the guide members are slidably connected to the vertical rods.

[0013] As a further improvement of the above solution, both sides of the bidirectional screw are fixedly connected to limit rods, and the limit rods are slidably connected to the movable plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model drives two sets of movable plates threadedly connected thereto to move toward each other by rotating a bidirectional screw rod. The hinged connection between the movable plate, the vertical rod and the connecting rod, and the sliding cooperation between the vertical rod and the guide member can drive the roller on the bracket to roll downward on the inclined surface of one side of the clamping block. The sliding cooperation between the guide block and the guide rod can push the clamping block, thereby realizing rapid clamping of the workpiece. The operation is simple and the practicability is strong.

[0016] 2. The utility model clamps and fixes the side of the workpiece by means of a clamping block, so that no obstruction is caused to the surface of the workpiece, thereby facilitating the processing of the workpiece surface and further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of the clamping structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the clamping block of the utility model when viewed from above.

[0020] Description of main symbols:

[0021] 1. Placement table; 2. Clamping block; 3. Bidirectional screw; 4. Moving plate; 5. Bracket; 6. Roller; 7. Vertical rod; 8. Connecting rod; 9. Guide block; 10. Strip groove; 11. Guide rod; 12. Spring; 13. Anti-slip pad; 14. Guide piece; 15. Limit rod. DETAILED DESCRIPTION

[0022] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example 1:

[0024] Please combine Figure 1-3 , a workpiece clamping device for a CNC milling machine according to this embodiment includes:

[0025] The placing table 1 has two groups of clamping blocks 2 symmetrically connected on the top of the placing table 1, a cavity is provided inside the placing table 1, and a bidirectional screw rod 3 is rotatably connected to the inside of the cavity through a bearing, and a movable plate 4 is threadedly connected to the outside of the bidirectional screw rod 3 on both sides, and a bracket 5 is provided on one side of the clamping block 2. Two groups of rollers 6 are symmetrically rotatably connected to the bracket 5, and two groups of vertical rods 7 are symmetrically fixedly connected to the bottom of the bracket 5, and the vertical rods 7 are movably connected to the placing table 1, and a connecting rod 8 is symmetrically hinged between the vertical rods 7 and the movable plate 4 on the same side through a hinge, and a guide block 9 is symmetrically fixedly connected to the bottom of the clamping block 2. A strip groove 10 is provided at the position corresponding to the guide block 9 on the top of the placing table 1, and a guide rod 11 is fixedly connected to the inside of the strip groove 10, and the guide rod 11 is connected to the guide The sliding connection between the blocks 9 can play a certain guiding role in the horizontal movement of the clamping block 2. The opposite surfaces of the two groups of clamping blocks 2 are provided with anti-slip pads 13, which can increase the friction between the clamping block 2 and the workpiece, thereby improving the clamping and fixing effect of the workpiece. The side of the clamping block 2 in contact with the roller 6 is designed as an inclined surface, which is convenient for the roller 6 to push the clamping block 2 when rolling downward. The two sides of the placement table 1 are symmetrically fixed with guide members 14 and the guide members 14 are slidingly connected to the vertical rods 7, which can play a certain guiding role in the vertical movement of the bracket 5. The two sides of the bidirectional screw rod 3 are fixedly connected to the limit rod 15 and the limit rod 15 is slidingly connected to the movable plate 4, which can play a certain guiding role in the horizontal movement of the movable plate 4.

[0026] When the workpiece is put on the table 1, the two-way screw rod 3 is rotated to drive the two sets of movable plates 4 connected thereto by threading. The movable plates 4 and the vertical rod 7 and the connecting rod 8 are hinged to each other, and the sliding cooperation between the vertical rod 7 and the guide member 14 can drive the roller 6 on the bracket 5 to roll downward on the inclined surface of one side of the clamping block 2. The sliding cooperation between the guide block 9 and the guide rod 11 can push the clamping block 2, thereby realizing rapid clamping of the workpiece, simple operation and strong practicality. At the same time, the side of the workpiece is clamped and fixed by the clamping block 2, so that no obstruction is caused on the surface of the workpiece, thereby facilitating the processing of the workpiece surface and further improving the practicality of the device. The workpiece is then processed by the CNC milling machine, and finally the two-way screw rod 3 is reversed to release the workpiece and remove it.

[0027] Example 2:

[0028] Based on Example 1, this embodiment is further improved in that a spring 12 is provided on the outside of the guide rod 11, and the two ends of the spring 12 are fixedly connected to the inner wall of the strip groove 10 and the guide block 9 respectively, so that the clamping block 2 can automatically reset under the rebound action of the spring 12 when the workpiece is released.

[0029] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A workpiece clamping device for a CNC milling machine, characterized in that: include: A placing table (1) is provided, wherein the top of the placing table (1) is symmetrically and movably connected with two groups of clamping blocks (2), a cavity is provided inside the placing table (1), the inside of the cavity is rotatably connected with a bidirectional screw rod (3) through a bearing, both sides of the bidirectional screw rod (3) are threadedly connected to a movable plate (4), a bracket (5) is provided on one side of the clamping block (2), two groups of rollers (6) are symmetrically and rotatably connected to the bracket (5), two groups of vertical rods (7) are symmetrically and fixedly connected to the bottom of the bracket (5), and the vertical rods (7) are movably connected to the placing table (1), and connecting rods (8) are symmetrically hinged between the vertical rods (7) and the movable plate (4) on the same side through hinges.

2. A workpiece clamping device for a CNC milling machine according to claim 1, characterized in that: The bottom of the clamping block (2) is symmetrically fixedly connected to a guide block (9), and the top of the placement platform (1) is provided with a strip groove (10) at a position corresponding to the guide block (9). The interior of the strip groove (10) is fixedly connected to a guide rod (11), and the guide rod (11) is slidably connected to the guide block (9).

3. A workpiece clamping device for a CNC milling machine according to claim 2, characterized in that: The guide rod (11) is sleeved with a spring (12) on its exterior, and both ends of the spring (12) are fixedly connected to the inner wall of the strip groove (10) and the guide block (9) respectively.

4. A workpiece clamping device for a CNC milling machine according to claim 1, characterized in that: The opposing surfaces of the two groups of clamping blocks (2) are both provided with anti-slip pads (13).

5. A workpiece clamping device for a CNC milling machine according to claim 1, characterized in that: The side of the clamping block (2) that contacts the roller (6) is designed as an inclined surface.

6. A workpiece clamping device for a CNC milling machine according to claim 1, characterized in that: Guide members (14) are symmetrically fixedly connected to both sides of the placement platform (1), and the guide members (14) are slidably connected to the vertical rods (7).

7. A workpiece clamping device for a CNC milling machine according to claim 1, characterized in that: Both sides of the bidirectional screw rod (3) are fixedly connected to the limiting rod (15), and the limiting rod (15) is slidably connected to the movable plate (4).

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