Clamping device for numerical control machining

Abstract

The clamping device comprises a working box with an opening in the top, a working plate used for bearing workpieces is arranged in the working box in a sliding mode, through grooves extending in the height direction are formed in the two side walls, distributed in the width direction, of the working box, and a rotating shaft driven by a motor is arranged between the two through grooves in a penetrating mode. The rotating shaft can move up and down in the through groove, first hydraulic cylinders are arranged on the two sides of the working box, the telescopic ends of the first hydraulic cylinders are fixed to the motor and used for driving the motor to move up and down, the working plate is fixedly connected to the rotating shaft, and expansion grooves used for rotation of the working plate are formed in the two inner walls, distributed in the length direction, of the working box. And clamping plates for clamping workpieces are symmetrically distributed at the upper end of the working box in a sliding manner. According to the utility model, a next workpiece does not need to be clamped and processed after cleaning is finished, so that the cleaning time is saved, the production continuity is kept, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machining technology, and specifically relates to a clamping device for CNC machining. Background Technology

[0002] Numerical control (NC) machining refers to a process of machining parts on CNC machine tools. The process specifications of CNC machine tool machining are generally consistent with those of traditional machine tool machining. It is a high-precision and high-efficiency machining method. The machine tool clamping device (machine tool fixture) is a component on the machine tool used to clamp or guide the cutting tool, and it is an important part of CNC machine tools.

[0003] Currently, after a single workpiece is machined, the machine tool clamping device requires the fixture and clamping platform to be cleaned.

[0004] To prevent iron filings from affecting the positioning accuracy of the workpiece, a self-cleaning machine tool fixture is proposed in utility model patent CN220372690U. This fixture includes a support frame with a machine tool fixture platform placed on top. Support plates are fixedly installed on both sides of the top of the machine tool fixture platform, and a box is fixedly installed on one side of the support frame. A pressure sensor is fixedly installed in the middle of the upper surface of the machine tool fixture platform, and a support plate is fixedly installed on top of the pressure sensor. A screw is screwed to the middle of the top wall of the support plate through a screw hole, and a pressure block is fixedly installed at the bottom of the screw. This design, through the use of a pressure sensor, push rod motor, and rotating rod, automatically cleans the fixture platform after each set of workpieces is processed and removed. However, the following problems still exist: the next workpiece cannot be clamped and processed until the fixture platform is cleaned, resulting in production interruptions, extending the processing time for a single workpiece, and affecting production efficiency. Utility Model Content

[0005] To address the existing technical problems, this utility model proposes a clamping device for CNC machining, which solves the problem of CNC fixture cleaning affecting production efficiency.

[0006] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution: A clamping device for CNC machining, according to this utility model, includes a top-opening workbox, a work plate for receiving workpieces slidably disposed inside the workbox, through slots extending along the height direction on the two side walls of the workbox distributed along the width direction, a motor-driven rotating shaft passing through the two through slots, the rotating shaft being able to move up and down in the through slots, first hydraulic cylinders provided on both sides of the workbox, the telescopic ends of the first hydraulic cylinders being fixed to the motor for driving the motor to move up and down, the work plate being fixedly connected to the rotating shaft, and expansion slots for rotating the work plate provided on the two inner walls of the workbox distributed along the length direction; clamping plates for clamping workpieces are slidably distributed on the upper end of the workbox.

[0007] Furthermore, a rinsing pipe is provided through the side wall of the work box along its length. The water outlet of the rinsing pipe extends into the work box and its end is equipped with a nozzle for rinsing the work plate, preventing iron filings from sticking to the work plate and making the work plate cleaner.

[0008] Furthermore, a pull-out box for slag storage is slidably provided at the bottom of the working box. The pull-out box is equipped with a handle, which is used to pull out the pull-out box and collect and process the iron filings inside.

[0009] Furthermore, the pull-out box is equipped with a drain pipe to drain the waste liquid in the pull-out box, increase the chip storage capacity of the pull-out box, and facilitate the dumping of iron chips.

[0010] Furthermore, a second hydraulic cylinder is provided at both ends of the work box, and the extension and retraction ends of the second hydraulic cylinder are connected to the clamping plate.

[0011] Furthermore, a push rod is provided through the clamping plate, and a rubber pad is provided at the clamping end of the push rod. The push rod is screwed to the clamping plate, which can perform secondary clamping of the workpiece, stabilize the position of the workpiece, facilitate processing, and the rubber pad at the end of the push rod can prevent damage to the surface of the workpiece and improve the quality of the workpiece.

[0012] Furthermore, the two ends of the rotating shaft extending out of the work box are equipped with sleeves. The sleeves are fixed to the motor by connecting rods. The lower end of the sleeve is equipped with a shielding curtain to block the through slot, which can prevent iron filings, waste liquid and other debris from flying out of the work box through the through slot, and keep the processing site environment clean.

[0013] Furthermore, an observation window is provided on either side wall of the work box to observe the amount of iron filings and waste liquid stored in the pull-out box, so as to facilitate timely discharge.

[0014] In summary, this utility model features a liftable and rotatable work plate and an expansion slot that mates with the work plate. After a workpiece is processed, the working surface of the work plate can be changed, and then another working surface can be used for clamping the workpiece. At the same time, the iron filings and waste liquid on it can be poured out. There is no need to wait for the cleaning to be completed before clamping and processing the next workpiece, which saves cleaning time, maintains the continuity of production, and improves production efficiency.

[0015] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a clamping device for CNC machining according to the present invention.

[0017] Figure 2This is a front view of a clamping device for CNC machining according to the present invention.

[0018] Figure 3 for Figure 2 Sectional view of AA.

[0019] Figure 4 This is a cross-sectional view of the work plate rotating in a clamping device for CNC machining according to this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0021] Please see Figure 1 A clamping device for CNC machining includes a top-opening work box 1, a work plate 2 that can slide up and down inside the work box 1, the work plate 2 abutting against the inner wall of the work box 1 around its perimeter, and through slots 13 extending along the height direction on the two side walls of the work box 1 distributed along its width direction, the through slots 13 being correspondingly arranged; a rotating shaft 10 driven by a motor 11 passing through the two through slots 13, the rotating shaft 10 being able to move up and down and rotate within the through slots 13; first hydraulic cylinders 8 are provided on both sides of the work box 1, the telescopic ends of the first hydraulic cylinders 8 being fixed to the motor 11 for use in machining. The motor 11 and the rotating shaft 10 are driven to move up and down; the working plate 2 is fixed to the rotating shaft 10, thereby realizing the up and down movement and rotation of the working plate 2 (when the rotating shaft 10 moves upward to the maximum mileage, the upper surface of the working plate 2 is flush with the top surface of the working box 1); the two inner walls of the working box 1 distributed along the length direction are provided with expansion slots 12 for assisting the rotation of the working plate 2, which can avoid interference between the working plate 2 and the inner wall of the working box 1 when rotating. In this embodiment, the expansion slots 12 are trapezoidal, which can prevent iron filings from being stuck in the expansion slots 12 when pouring iron filings.

[0022] Please see Figure 1 , Figure 2 The top of the work box 1 is equipped with two second hydraulic cylinders 6 at both ends. The second hydraulic cylinders 6 are fixed to the work box 1. Clamping plates 3 are slidably distributed on the top wall of the work box 1. The clamping plates 3 are U-shaped and inverted on the work box 1. The telescopic end of the second hydraulic cylinder 6 is connected to the clamping plate 3 to push the clamping plate 3 to achieve clamping or separation action. The clamping plate 3 is provided with a push rod 5 distributed along the length direction of the clamping plate 3. The clamping end of the push rod 5 is provided with a rubber pad 4. The push rod 5 is screwed to the clamping plate 3, which can perform secondary clamping of the workpiece, stabilize the position of the workpiece, and facilitate processing. The rubber pad 4 at the end of the push rod 5 can prevent damage to the surface of the workpiece and improve the quality of the workpiece.

[0023] Please see Figure 1 , Figure 3A flushing pipe 7 is provided through the side wall of the working box 1 along its length. The flushing pipe 7 is connected to a water tank via a water pump. The water outlet of the flushing pipe 7 extends into the working box 1 and is equipped with a nozzle 14 at its end. In this embodiment, the water outlet of the flushing pipe 7 passes through the outer wall of the expansion groove 12. The nozzle 14 is located in the expansion groove 12 and is inclined upward to facilitate better flushing of the working plate 2. A pull-out box 15 for storing slag is slidably provided at the bottom of the working box 1. The pull-out box 15 is equipped with a handle 16 for receiving the iron filings, waste liquid, and water sprayed from the flushing pipe 7 poured out by the working plate 2. At the same time, the pull-out box 15 is equipped with a drain pipe 17 for discharging waste liquid and cleaning water. Then, the iron filings inside the pull-out box 15 can be poured out by pulling out the handle 16. Whether the pull-out box 15 needs to be cleaned can be determined by the observation window 19 on the side wall of the working box 1.

[0024] Please see Figure 3 The rotating shaft 10 extends out of both ends of the working box 1 and is provided with a sleeve 9. The sleeve 9 is fixed to the motor 11 through the connecting rod 18. The lower end of the sleeve 9 is provided with a shielding curtain 20 for shielding the through groove 13. The material of the shielding curtain 20 is not limited. For example, it can be made of cloth or leather, as long as it can extend when moving upward and retract when moving downward.

[0025] Working process: S1, In the initial state, the working plate 2 is at the upper limit position (the rotating shaft 10 moves upward to the maximum distance), and its upper surface is flush with the top surface of the working box 1. First, the workpiece is placed on the working plate 2, and then the second hydraulic cylinder 6 is extended and the clamping plate 3 moves in opposite directions to perform a clamping action, thereby clamping the workpiece. At the same time, the push rod 5 can be used to perform a secondary clamping of the workpiece, and then the processing begins.

[0026] S2, after processing is completed, control the second hydraulic cylinder 6 to retract, the clamping plate 3 to separate in opposite directions, then remove the workpiece, and then perform the cleaning action;

[0027] S3, when cleaning the work plate 2, firstly retract the first hydraulic cylinder 8, driving the motor 11, the rotating shaft 10 and the work plate 2 to descend into the work box 1. When the work plate 2 reaches the expansion slot 12, stop the first hydraulic cylinder 8, then control the motor 11 to drive the rotating shaft 10, and the rotating shaft 10 to drive the work plate 2 to rotate. While changing the working surface, the iron filings, waste liquid, etc. on the work plate 2 can also be poured out. After the work plate 2 rotates 180°, it stops. The working surface of the work plate 2 is changed. Then control the first hydraulic cylinder 8 to extend, driving the work plate 2 to move upward to the upper limit position, and then the clamping work of the next workpiece can be carried out.

[0028] S4, then, start the water pump and spray cleaning water mist through the flushing pipe 7 and nozzle 14 to flush the initial working surface that was replaced by the working plate 2. After flushing is completed, turn off the water pump.

[0029] Repeat steps S2-S4 above to achieve cyclical use, eliminating the need to wait for work plate 2 to be cleaned, thus improving production efficiency.

[0030] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A clamping device for CNC machining, comprising a work box (1) with a top opening, characterized in that: A working plate (2) is slidably provided inside the working box (1). Through slots (13) are provided on the two side walls of the working box (1) along the width direction. A rotating shaft (10) driven by a motor (11) is provided between the two through slots (13). A first hydraulic cylinder (8) is provided on both sides of the working box (1). The telescopic end of the first hydraulic cylinder (8) is fixed to the motor (11). The working plate (2) is fixed on the rotating shaft (10). An expansion slot (12) for the rotation of the working plate (2) is provided on the two inner walls of the working box (1) along the length direction. Clamping plates (3) are slidably distributed on the upper end of the working box (1).

2. The clamping device for CNC machining according to claim 1, characterized in that: The working box (1) has a flushing pipe (7) running through its side wall along its length. The water outlet of the flushing pipe (7) extends into the working box (1) and has a nozzle (14) at its end.

3. The clamping device for CNC machining according to claim 1, characterized in that: The bottom of the working box (1) is provided with a pull-out box (15) for storing slag, and the pull-out box (15) is provided with a handle (16).

4. The clamping device for CNC machining according to claim 3, characterized in that: The pull-out box (15) is equipped with a drain pipe (17).

5. A clamping device for CNC machining according to claim 1, characterized in that: The work box (1) is equipped with a second hydraulic cylinder (6) at both ends, and the extension and retraction ends of the second hydraulic cylinder (6) are connected to the clamping plate (3).

6. A clamping device for CNC machining according to claim 1, characterized in that: A push rod (5) is provided through the clamping plate (3), and a rubber pad (4) is provided at the clamping end of the push rod (5). The push rod (5) is screwed to the clamping plate (3).

7. A clamping device for CNC machining according to claim 1, characterized in that: The rotating shaft (10) extends out of both ends of the working box (1) and is equipped with a sleeve (9). The sleeve (9) is fixed to the motor (11) through the connecting rod (18). The lower end of the sleeve (9) is equipped with a shielding curtain (20) for shielding the through groove (13).

8. A clamping device for CNC machining according to claim 1, characterized in that: An observation window (19) is provided on any side wall of the work box (1).

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