Precise positioning jig for CNC machining

Abstract

The precise positioning jig used for CNC machining comprises a bottom plate, through grooves are formed in the middles of the left side and the right side of the bottom plate respectively, lead screws are rotationally connected into the through grooves, sliding blocks are connected to the middles of the lead screws in a threaded mode, the sliding blocks are correspondingly connected with the through grooves in a sliding mode, and side clamping plates are fixedly connected to the upper ends of the sliding blocks. The upper end of the outer side of each side clamping plate is fixedly connected with a guide rail, the interior of each guide rail is slidably connected with a sliding piece, the upper end of each sliding piece is fixedly connected with a side top plate, a screw hole is formed in the middle of the upper surface of each sliding piece, and a jackscrew is in threaded connection with the interior of each screw hole. Compared with a method that a traditional jig clamps the workpiece through clamping force generated by clamping of the two sides, the situation that the friction force between the workpiece and the jig is reduced due to the fact that the surfaces of the clamping plates on the two sides are abraded or the surface of the workpiece is smooth can be effectively avoided, the workpiece is prevented from deviating in the machining process, and then the positioning precision of the jig is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining equipment technology, specifically a precision positioning fixture used in CNC machining. Background Technology

[0002] CNC machining of high-precision parts typically requires the use of positioning fixtures to ensure accurate positioning and stable fixation of the workpiece, and to perform high-precision engraving, cutting, drilling and other machining operations. Positioning fixtures generally use clamping, adsorption or other fixing methods to firmly fix the workpiece on the machining platform, and can provide precise positioning reference points or reference surfaces for machining, so that the machining process can be performed more accurately based on the determined reference position.

[0003] However, most existing positioning fixtures use two-sided clamping for positioning. When the CNC machine is machining the workpiece, the forces from two directions are canceled out by the friction between the two clamping plates and the workpiece. However, when the positioning fixture is used for a long time or the workpiece surface has a high degree of smoothness, the friction on both sides is prone to decrease, resulting in poor workpiece positioning stability and affecting the overall positioning accuracy of the fixture. Therefore, we propose a precision positioning fixture for CNC machining. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a precision positioning fixture for CNC machining. When in use, the fixture positions the workpiece on four sides, and the front and rear sides are positioned by two points on the left and right. Compared with the traditional fixture method of clamping the workpiece by the clamping force generated by the clamping on both sides, it can effectively avoid the wear of the surface of the clamping plates on both sides or the smoothness of the workpiece surface, which would affect the friction between the workpiece and the fixture and reduce the friction. It can also prevent the workpiece from shifting during machining, thereby ensuring the positioning accuracy of the fixture and effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A precision positioning fixture for CNC machining includes a base plate, through slots are respectively opened in the middle of the left and right sides of the base plate, and a lead screw is rotatably connected inside the through slot. A slider is threadedly connected to the middle of the lead screw, and the slider is slidably connected to the through slot. A side clamping plate is fixedly connected to the upper end of the slider, and a guide rail is fixedly connected to the upper outer side of the side clamping plate. A sliding piece is slidably connected inside the guide rail, and a side top plate is fixedly connected to the upper end of the sliding piece. A threaded hole is opened in the middle of the upper surface of the sliding piece, and a set screw is threadedly connected inside the threaded hole. The lower end of the set screw contacts the inner surface of the guide rail. Sliding grooves are respectively opened at the front and rear ends of the upper surface of the base plate. Connecting pieces are fixedly connected to the front and rear sides of the lower end of the side clamping plate, and the connecting pieces are slidably connected to the corresponding sliding grooves. A positioning bolt is threadedly connected to the upper end of the connecting piece, and the lower end of the positioning bolt contacts the inner upper surface of the sliding groove.

[0006] Furthermore, it also includes a pad and fastening bolts. The inner side of the side clamp has connecting screw holes arranged in a linear array, and the side surface of the pad has countersunk holes arranged in a linear array corresponding to the connecting screw holes on the side clamp surface. Fastening bolts are rotatably connected inside the countersunk holes, and the fastening bolts are threadedly connected to the connecting screw holes. The pad can be easily replaced and adjusted by the staff, and can prevent damage to the side clamp surface from causing damage to the entire fixture. It facilitates the maintenance and repair of the fixture, thereby extending the service life of the fixture.

[0007] Furthermore, it also includes buckle plates and telescopic rods. The opposite surfaces of the left and right side top plates are provided with slots, and buckle plates are snapped into the slots. The buckle plates on both sides are fixedly connected by telescopic rods. The buckle plates and telescopic rods can connect the side top plates on both sides into a whole, so that the jig clamping space forms a frame shape, which facilitates the jig to clamp and fix irregular parts, greatly enhancing the functionality of the jig during use.

[0008] Furthermore, it also includes a guide channel and a diversion channel. The guide channel is opened at both ends of the sliding groove opened on the surface of the base plate, and the lower end of the guide channel is connected to the lower side of the base plate. The diversion channel is opened on the left and right sides of the lower surface of the base plate, and the diversion channel and the guide channel are interconnected. The opened guide channel and diversion channel can effectively prevent the cutting coolant from failing to drain and affecting the normal use of the fixture. At the same time, it can prevent the cutting coolant from corroding the fixture for a long time and affecting the positioning accuracy of the fixture.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: The precision positioning fixture used in this CNC machining has the following advantages:

[0010] 1. When using this fixture, the workpiece is positioned on all four sides, and the front and rear sides are positioned by two points on the left and right. Compared with the traditional fixture method of clamping the workpiece by the clamping force generated by the clamping on both sides, it can effectively avoid the wear of the clamping plate surface on both sides or the smoothness of the workpiece surface, which would affect the friction between the workpiece and the fixture and reduce the friction. This prevents the workpiece from shifting during processing and thus ensures the positioning accuracy of the fixture.

[0011] 2. The pads provided allow staff to easily replace and adjust them, preventing damage to the side clamps that could lead to damage to the entire fixture. This facilitates maintenance and repair of the fixture, thereby extending its service life.

[0012] 3. The buckle plate and telescopic rod can connect the side top plates on both sides into a whole, so that the jig clamping space forms a frame shape, which facilitates the jig to clamp and fix irregular parts, greatly enhancing the functionality of the jig during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure from the upper side of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure from the lower side view of this utility model.

[0016] In the diagram: 1. Base plate, 2. Lead screw, 3. Slider, 4. Side clamping plate, 5. Pad plate, 6. Fastening bolt, 7. Guide rail, 8. Connecting piece, 9. Positioning bolt, 10. Side top plate, 11. Sliding piece, 12. Top screw, 13. Buckle plate, 14. Telescopic rod, 15. Guide groove, 16. Drainage groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This embodiment provides a technical solution: a precision positioning fixture for CNC machining, including a base plate 1. Through slots are respectively opened in the middle of the left and right sides of the base plate 1, and a lead screw 2 is rotatably connected inside the through slots. A slider 3 is threadedly connected to the middle of the lead screw 2, and the slider 3 is slidably connected to the through slot. A side clamping plate 4 is fixedly connected to the upper end of the slider 3, and a guide rail 7 is fixedly connected to the upper outer side of the side clamping plate 4. A sliding piece 11 is slidably connected inside the guide rail 7, and a side top plate 10 is fixedly connected to the upper end of the sliding piece 11. A threaded hole is opened in the middle of the upper surface of the sliding piece 11, and a top screw 12 is threadedly connected inside the threaded hole. The lower end of the top screw 12 contacts the inner surface of the guide rail 7. Sliding grooves are respectively opened at the front and rear ends of the upper surface of the base plate 1. Connecting pieces 8 are fixedly connected to the front and rear sides of the lower end of the side clamping plate 4, and the connecting pieces 8 are slidably connected to the corresponding sliding grooves. A positioning bolt 9 is threadedly connected to the upper end of the connecting piece 8, and the lower end of the positioning bolt 9 contacts the inner upper surface of the sliding groove.

[0019] In this embodiment, a pad 5 and a fastening bolt 6 are also included. The inner side of the side clamping plate 4 is provided with connecting screw holes in a linear array. The side surface of the pad 5 is provided with countersunk holes in a linear array corresponding to the connecting screw holes on the surface of the side clamping plate 4. The fastening bolt 6 is rotatably connected inside the countersunk hole, and the fastening bolt 6 is threadedly connected to the connecting screw hole. The pad 5 can be easily replaced and adjusted by the staff, and can prevent damage to the surface of the side clamping plate 4 from causing damage to the entire fixture. It is convenient for the staff to inspect and maintain the fixture, thereby extending the service life of the fixture.

[0020] In this embodiment, a buckle plate 13 and a telescopic rod 14 are also included. The opposite surfaces of the side top plates 10 on the left and right sides are provided with slots, and the buckle plate 13 is snapped into the inside of the slots. The buckle plates 13 on both sides are fixedly connected by the telescopic rod 14. The buckle plate 13 and the telescopic rod 14 can connect the side top plates 10 on both sides into a whole, so that the jig clamping space forms a frame shape, which facilitates the jig to clamp and fix irregular parts, and greatly enhances the functionality of the jig during use.

[0021] In this embodiment, a guide groove 15 and a diversion groove 16 are also included. The guide groove 15 is opened at both ends of the sliding groove opened on the surface of the base plate 1, and the lower end of the guide groove 15 is connected to the lower side of the base plate 1. The diversion groove 16 is opened on the left and right sides of the lower surface of the base plate 1, and the diversion groove 16 and the guide groove 15 are interconnected. The guide groove 15 and the diversion groove 16 can effectively prevent the cutting coolant from failing to drain and affecting the normal use of the fixture. At the same time, they can prevent the cutting coolant from corroding the fixture for a long time and affecting the positioning accuracy of the fixture.

[0022] The working principle of the precision positioning fixture for CNC machining provided by this utility model is as follows: The base plate 1 is installed on the machining platform of the machining center, and then the workpiece to be processed is placed on the surface of the base plate 1. The lead screws 2 on both sides are rotated so that the side clamping plates 4 on both sides clamp and fix the left and right sides of the workpiece. Then, the side top plate 10 is pushed so that the side top plate 10 clamps and fixes the left and right ends of the workpiece. After clamping and fixing, the positioning bolt 9 and the top screw 12 are locked to ensure that the fixture stably fixes the workpiece. When machining irregularly shaped workpieces, the buckle plate 13 can be installed so that the side top plates 10 on the left and right sides are connected into a whole. The four-sided clamping method can position and clamp irregularly shaped workpieces. Moreover, when using this fixture, it can effectively prevent the workpiece from being displaced due to the vibration generated by the machining center or the workpiece, thereby achieving the purpose of ensuring the positioning and machining accuracy of the workpiece.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A precision positioning jig for use in CNC machining, characterized by: The utility model provides a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side clamping plate and slide groove, and the utility model discloses a kind of side 2. The precision positioning fixture for CNC machining according to claim 1, wherein: ​ 3. The precision positioning fixture for CNC machining according to claim 1, wherein: ​ 4. The precision positioning fixture for CNC machining according to claim 1, wherein: ​

Images