Workpiece clamping device for numerical control drilling

Abstract

The workpiece clamping device for the numerical control drilling comprises a base and a pressing mechanism, a plurality of chuck base holes are formed in the base, and a reference edge is arranged on the edge of the surface of the base; the pressing mechanism comprises a base, a handle and an adjustable pressing head support are hinged to the top of the base, a positioning pin is arranged at the bottom of the base and connected with a chuck base hole in a matched mode, the handle is of an n-shaped structure, a pressing head is arranged in an inner cavity in the middle of the handle, and the two ends of the pressing head are hinged to the handle and the adjustable pressing head support respectively. The pressure head rotationally controls self-locking of the adjustable pressure head support, the adjustable pressure head support is movably connected with an adjustable pressure rod, and the bottom end of the adjustable pressure rod is connected with the pressure head. Through the arrangement of the base hole and the positioning pin, the pressing mechanism is convenient to assemble and disassemble, the clamping head and the handle are arranged, the adjustable pressing head support is self-locked, a part to be punched is fixed through the pressing head, and through the arrangement of the reference edge on the base, the technical problem of ceaseless clamping and alignment in the existing part punching process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of CNC part drilling devices, and particularly relates to a workpiece clamping device for CNC drilling. Background Technique

[0002] With the continuous iteration and optimization of the digital manufacturing of machining parts in recent years, in order to meet the assembly efficiency and quality of aircraft components, through reverse deduction by the R model, positioning holes, assembly holes, guide holes, etc. are added to the side walls and webs of parts. As the production demand increases continuously, due to the long production cycle of scribing and drilling, high labor intensity of workers, and poor quality stability of parts, it is no longer possible to meet the actual on-site processing requirements by using fitters for scribing and drilling. With the increase in production tasks and the improvement of military quality requirements, reducing the unqualified products caused by human factors, further improving the drilling accuracy, improving the quality, and enhancing the processing efficiency are inevitable requirements. Converting the part from manual drilling to CNC drilling is an effective way to solve the above problems. However, due to the variety of part types for on-site drilling, through on-site verification and analysis, there are many drawbacks in on-site part drilling: continuous clamping and alignment, and difficulties in clamping and alignment during CNC drilling. To solve the above problems, the utility model designs and manufactures a general CNC drilling device, which can meet the drilling requirements of both vertical and horizontal machine tools at the same time. For the same batch and series, one-time alignment can be carried out for batch production. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a workpiece clamping device for CNC drilling, which solves the technical problem of continuous clamping and alignment during the existing part drilling.

[0004] The technical solution adopted by the utility model is that a workpiece clamping device for CNC drilling includes a base and a pressing mechanism. A number of chuck base holes are arranged on the base, and a reference edge is provided at the edge of the base surface; the pressing mechanism includes a base, on the top of which a handle and an adjustable pressure head support are respectively hinged, and a positioning pin is provided at the bottom of the base, and the positioning pin is connected with the chuck base hole in a matching manner. The handle is of an n-shaped structure, and a pressure head is arranged in the inner cavity of the middle part of the handle. The two ends of the pressure head are respectively hinged with the handle and the adjustable pressure head support. The rotation of the pressure head controls the self-locking of the adjustable pressure head support. An adjustable pressure rod is movably connected to the adjustable pressure head support, and the bottom end of the adjustable pressure rod is connected with a pressure head.

[0005] The characteristics of the utility model also lie in that:

[0006] A through groove is opened inside the adjustable pressure head support, and the adjustable pressure rod passes through the through groove. The adjustable pressure rod is connected with the adjustable pressure head support through a height adjuster; the height adjuster includes a nut and an anti-slip gasket.

[0007] The pressure head is connected with the adjustable pressure rod through a thread.

[0008] The base is of a split structure. The top of the base consists of two symmetrically arranged trapezoidal plates, and the bottom of the base is a cylindrical seat. The high point of the hypotenuse of the trapezoidal plate is hinged to the adjustable pressure head support through a support connecting bolt, and the low point of the hypotenuse of the trapezoidal plate is hinged to the handle through a handle connecting bolt. A connecting block is fixedly connected to the bottom of the trapezoidal plate. The connecting block and the cylindrical seat are connected through fasteners.

[0009] The cross-section of the base is rectangular, and the reference edges are set on three edges of the surface of the base. Origin holes a and origin holes b are respectively opened at the intersections of two adjacent reference edges. A clamping slot is opened on the side wall of the base.

[0010] The beneficial effects of the present utility model are as follows:

[0011] Through the settings of the base hole and the positioning pin in the present utility model, it is convenient to load and unload the pressing mechanism. The chuck and the handle are set to lock the adjustable pressure head support, so as to fix the pressure head on the part to be drilled. And through the setting of the reference edges on the base, the technical problem of continuous clamping and alignment during the hole-making of existing parts is solved. The present utility model can meet the hole-making of special-shaped parts such as L-shaped, T-shaped, I-shaped, and U-shaped parts. During the operation process, by tightening and loosening the chuck, the parts can be conveniently replaced. The base is provided with positioning references, which can meet the processing problems of symmetric parts, solve the problems of poor tooling versatility, long production cycle, and high manufacturing cost existing in the hole-making work, thereby improving the on-site part hole-making efficiency, improving the hole-drilling quality and accuracy of the parts of the product, and reducing the production cost. The present utility model is applicable to batch and single-piece controlled hole-making of machining parts, optimizes the method of hole-making by workers through scribing, thereby improving the part hole-making processing efficiency and processing quality, and reducing the labor intensity of workers. Description of the Drawings

[0012] Figure 1 is the structural schematic diagram of the workpiece clamping device for numerical control drilling of the present utility model;

[0013] Figure 2 is the structural schematic diagram of the pressing mechanism in the workpiece clamping device for numerical control drilling of the present utility model;

[0014] Figure 3 is Figure 2 the top view of;

[0015] Figure 4 is Figure 1 the enlarged structural schematic diagram at position A in.

[0016] In the figure, 1. origin hole a, 2. reference edge, 3. origin hole b, 4. chuck base hole, 5. clamping slot, 6. positioning pin, 7. base, 8. handle connecting bolt, 9. bracket connecting bolt, 10. handle, 11. fixing block, 12. adjustable pressure rod, 13. height adjuster, 14. pressure head, 15. connecting bolt, 16. connecting block, 17. adjustable pressure head bracket, 18. anti-slip gasket. Detailed implementation mode

[0017] The present utility model will be further explained and illustrated below in conjunction with the accompanying drawings and the detailed implementation mode.

[0018] Embodiment 1

[0019] As Figures 1-4 shown, the workpiece clamping device for numerical control drilling disclosed by the present utility model includes a base and a pressing mechanism. A plurality of chuck base holes 4 are arranged on the base, and a reference edge 2 is provided at the edge of the base surface; the pressing mechanism includes a base 7. A handle 10 and an adjustable pressure head bracket 17 are respectively hinged at the top of the base 7. A positioning pin 6 is provided at the bottom of the base 7, and the positioning pin 6 is connected with the chuck base hole 4 in a matching manner. The handle 10 is of an n-shaped structure. A pressure head 14 is arranged in the inner cavity of the middle part of the handle 10. Two ends of the pressure head 14 are respectively hinged with the handle 10 and the adjustable pressure head bracket 17. The rotation of the pressure head 14 controls the self-locking of the adjustable pressure head bracket 17. An adjustable pressure rod 12 is movably connected to the adjustable pressure head bracket 17, and the bottom end of the adjustable pressure rod 12 is connected with the pressure head 14.

[0020] In this embodiment, the base is used for clamping and fixing with the machine tool platform. The distances between a plurality of chuck base holes 4 are the same. During use, first, the origin hole a 1 and the origin hole b 3 are used for alignment. The reference edge of the part to be drilled is attached to the reference edge on the base. The positioning pin 6 is inserted into the chuck base hole 4 near the part to be drilled. The position of the adjustable pressure rod 12 in the adjustable pressure head bracket 17 is adjusted. The pressure head 14 is placed at the position on the part to be drilled that needs to be fixed. The handle 10 is moved to fix the part to be drilled to the base, and subsequent vertical or horizontal machine bed number control holes are carried out. In order to avoid the jamming and inflexibility of the frequently disassembled parts of the device, all connections adopt simple positioning pin clearance fit connections. The base 7, the handle 10, the adjustable pressure head bracket 17 and the adjustable pressure rod 12 can be firmly fixed on the base by their own weights in the vertical direction without redundant constraints.

[0021] Embodiment 2

[0022] On the basis of Embodiment 1, a through groove is formed inside the adjustable punch holder 17, and the adjustable punch rod 12 passes through the through groove. The adjustable punch rod 12 can move horizontally or vertically within the through groove to correspondingly adjust the punch 14 according to the length or thickness of the part to be punched. The adjustable punch rod 12 is connected to the adjustable punch holder 17 through a height adjuster 13. The height adjuster 13 includes a nut and an anti-slip gasket 18. The anti-slip gasket is sleeved on the adjustable punch rod 12 and tightened by rotating the nut. The punch 14 is threadedly connected to the adjustable punch rod 12, which is convenient for replacing the punch 14.

[0023] Embodiment 3

[0024] On the basis of Embodiment 1, the base 7 has a split structure. The top of the base 7 is two symmetrically arranged trapezoidal plates, and the adjustable punch holder 17 is placed between the two trapezoidal plates. The bottom of the base 7 is a cylindrical seat. The high point of the hypotenuse of the trapezoidal plate is hinged to the adjustable punch holder 17 through a support connection bolt 9, and the low point of the hypotenuse of the trapezoidal plate is hinged to the handle 10 through a handle connection bolt 8. When the handle 10 is pressed in the direction away from the adjustable punch holder 17, the handle 10 rotates around the handle connection bolt 8, and the punch 14 rotates around the pin connection with the adjustable punch holder 17. When an obtuse angle is formed between the handle 10 and the adjustable punch holder 17, as Figure 2 shown, at this time, the left side of the punch 14 abuts against the top side of the adjustable punch holder 17 to achieve self-locking. When wanting to replace the part or rotate, push the handle 10 upward to release the self-locking. A connection block 16 is fixedly connected to the bottom of the trapezoidal plate. The connection block 16 and the cylindrical seat are connected through a fastener. In this embodiment, the fastener is a connection bolt 15.

[0025] Embodiment 4

[0026] On the basis of Embodiment 1 or 2 or 3, the cross-section of the base is rectangular, and the reference edges 2 are arranged on three edges of the surface of the base. Origin holes a1 and origin holes b3 are respectively formed at the intersections of two adjacent reference edges 2. A clamping slot 5 is formed on the side wall of the base, and the base and the machine tool are clamped through the clamping slot 5. In actual work, two adjacent surfaces of the base can be used to clamp the part to be punched, and the base can be flipped to perform secondary drilling without moving the part.

[0027] This utility model meets the requirements of rapid clamping and alignment for part drilling and tooling fixtures, and has good versatility. According to the width and length required by the part to be drilled, the part to be drilled can be directly leaned against the tooling reference. By adjusting and loosening the height adjuster 13, further loosening the pressure head 14, and pressing the handle 10, the part to be drilled can be fixed on the base, and then numerical control drilling can be carried out, which greatly reduces the labor intensity of operators, thereby improving the operation efficiency and operation quality, and has great practical significance. This utility model has strong practicability, can improve the equipment utilization rate, reduce the labor intensity of operators and reduce the dependence on the skill level of operators, and improve the part turnover and delivery progress, improve the numerical control processing ability, improve the product processing quality, and shorten the manufacturing cycle.

Claims

1. A workpiece clamping device for numerical control drilling, characterized in that It includes a base and a pressing mechanism. A number of collet base holes (4) are arranged on the base, and a reference edge (2) is provided at the edge of the base surface; the pressing mechanism includes a base (7). A handle (10) and an adjustable punch support (17) are respectively hinged at the top of the base (7). A positioning pin (6) is provided at the bottom of the base (7), and the positioning pin (6) is connected with the collet base hole (4) in a matching manner. The handle (10) is of an n-shaped structure, and a punch (14) is arranged in the inner cavity of the middle part of the handle (10). The two ends of the punch (14) are respectively hinged with the handle (10) and the adjustable punch support (17). The rotation of the punch (14) controls the self-locking of the adjustable punch support (17). An adjustable pressure rod (12) is movably connected to the adjustable punch support (17), and the bottom end of the adjustable pressure rod (12) is connected with a punch (14).

2. The workpiece clamping device for numerical control drilling according to claim 1, wherein, A through groove is formed inside the adjustable punch support (17), and the adjustable pressure rod (12) passes through the through groove. The adjustable pressure rod (12) is connected with the adjustable punch support (17) through a height adjuster (13); the height adjuster (13) includes a nut and an anti-slip gasket (18).

3. The workpiece clamping device for numerical control drilling according to claim 1, characterized in that, The punch (14) is connected with the adjustable pressure rod (12) through a thread connection.

4. The workpiece clamping device for numerical control drilling according to claim 1, characterized in that, The base (7) is of a split structure. The top of the base (7) is two symmetrically arranged trapezoidal plates, and the bottom of the base (7) is a cylindrical seat; the high point of the hypotenuse of the trapezoidal plate is hinged with the adjustable punch support (17) through a support connection bolt (9), and the low point of the hypotenuse of the trapezoidal plate is hinged with the handle (10) through a handle connection bolt (8). A connection block (16) is fixedly connected to the bottom of the trapezoidal plate; the connection block (16) and the cylindrical seat are connected through a fastener.

5. The workpiece clamping device for numerical control drilling according to any one of claims 1-4, characterized in that, The cross-section of the base is rectangular, and the reference edge (2) is arranged on three edges of the base surface. An origin hole a (1) and an origin hole b (3) are respectively formed at the intersection of two adjacent reference edges (2); a clamping card slot (5) is formed on the side wall of the base.

Images