A quick positioning fixture for lathe machining

Abstract

This utility model discloses a quick positioning fixture for lathe machining, including a base plate. Symmetrical grooves are formed on the top surface of the base plate, and positioning push blocks are slidably connected to the inner walls of each groove. A placement plate is fixedly connected to the top surface of the base plate. The fixture also includes a positioning component and a suction component. The positioning component is used for quickly positioning the workpiece, and the suction component is used to suction the workpiece onto the placement plate. The suction component includes mounting holes, a suction cup, a connecting tube, a sealing tube, and a piston rod. The mounting holes are symmetrically formed on the top surface of the placement plate, and the suction cup is installed inside the mounting holes. This utility model, by setting up the suction component and using the pressure of the push plate to expel air and create negative pressure, firmly suctions the workpiece, preventing it from loosening during machining. This improves the reliability of workpiece fixation and eliminates the need for manual reinforcement of the workpiece, further enhancing the stability and quality of lathe machining.

Description

Technical Field

[0001] This utility model relates to the field of lathe machining technology, and in particular to a quick positioning fixture for lathe machining. Background Technology

[0002] In modern manufacturing, lathes, as one of the core pieces of machining equipment, are widely used in various fields such as automotive parts manufacturing, aerospace precision parts processing, and mold production. When a workpiece is machined on a lathe, the accuracy and reliability of its positioning and fixation directly determine the product's dimensional accuracy, surface quality, and processing efficiency, making it a crucial factor in ensuring machining quality.

[0003] For current fixtures, the existing lathe quick positioning fixture disclosed in patent number "CN204954446U" clamps the workpiece to the end seat through a stop on one side of the spring, and then fixes the workpiece again through the limiting hole on the fixing block. This device fixes the workpiece again with bolts, requiring the operator to tighten and calibrate multiple bolts one by one, and repeatedly adjust the torque, which makes the clamping of the workpiece take a long time. Moreover, the frequent disassembly and assembly of bolts not only increases the labor intensity, but also causes problems such as thread stripping and indentation on the workpiece surface, resulting in a continuous decline in the fixation reliability.

[0004] Accordingly, this application proposes a quick positioning fixture for lathe machining. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick positioning fixture for lathe machining.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quick positioning fixture for lathe machining includes a base plate, on the top surface of which symmetrically open grooves are provided, and positioning push blocks are slidably connected to the inner walls of the grooves. A placement plate is fixedly connected to the top surface of the base plate.

[0008] Also includes:

[0009] A positioning component for rapidly positioning a workpiece;

[0010] An adsorption assembly is used to adsorb a workpiece onto a placement plate. The adsorption assembly includes mounting holes, a suction cup, a connecting tube, a sealing tube, and a piston rod. The mounting holes are symmetrically opened on the top surface of the placement plate. The suction cup is installed inside the mounting holes. The connecting tube is connected to the bottom of the suction cup. The sealing tube is connected to the end of the connecting tube away from the suction cup. The piston rod is sealed and connected inside the sealing tube.

[0011] Preferably, the adsorption assembly further includes a spring, a push plate, and an outlet pipe. The spring is fixedly connected to the end of the sealing tube near the piston rod, the push plate is fixedly connected to the end of the piston rod away from the sealing tube, and the outlet pipe is connected to the end of the sealing tube away from the piston rod.

[0012] Preferably, the spring is fixedly connected to the push plate.

[0013] Preferably, the positioning assembly includes an electric telescopic rod, a hinge block, a connecting rod, a connecting block, a support rod, and a slide rail. The electric telescopic rod is fixedly connected to the inside of the base plate. The hinge block is fixedly connected to the telescopic end of the electric telescopic rod. The connecting rod is symmetrically hinged to the inside of the hinge block. The connecting block is hinged to the end of the connecting rod away from the hinge block. The support rod is fixedly connected to the top surface of the connecting block. The slide rail is formed inside the base plate.

[0014] Preferably, the hinge block is slidably connected to the slide rail, the support rod is fixedly connected to the positioning push block, and the support rod is placed in the slide groove for sliding.

[0015] Preferably, a protruding rod is fixedly connected to the top surface of the hinge block.

[0016] This utility model has the following beneficial effects:

[0017] 1. By setting up suction cups, connecting tubes, sealing tubes, and other structures in the adsorption assembly, negative pressure is created by using the pressing push plate to expel air, which makes the suction cups firmly adsorb the workpiece, preventing the workpiece from loosening during processing, improving the reliability of workpiece fixation, and eliminating the need for manual reinforcement of the workpiece, further enhancing the stability and quality of lathe processing.

[0018] 2. By setting up a positioning component, the electric telescopic rod drives the hinge block, connecting rod, connecting block and other components to move, so that the positioning push block can quickly position the workpiece, which greatly improves the positioning efficiency, reduces the positioning time, and the positioning process is accurate and stable, effectively ensuring the machining accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a quick positioning fixture for lathe machining proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the bottom plate and the positioning component in this utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the placement plate and the adsorption component in this utility model.

[0022] In the diagram: 1. Base plate; 11. Slide groove; 2. Positioning push block; 21. Electric telescopic rod; 22. Hinge block; 23. Connecting rod; 24. Connecting block; 25. Support rod; 26. Slide rail; 3. Placement plate; 31. Mounting hole; 32. Suction cup; 33. Connecting pipe; 34. Sealing pipe; 35. Piston rod; 36. Spring; 37. Push plate; 38. Air outlet pipe; 4. Protruding rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1 to 3 A quick positioning fixture for lathe machining includes a base plate 1, with symmetrical grooves 11 on the top surface of the base plate 1, and positioning push blocks 2 slidably connected to the inner walls of the grooves 11. A placement plate 3 is fixedly connected to the top surface of the base plate 1.

[0025] A quick positioning fixture for lathe machining also includes a positioning component and an adsorption component. The adsorption component is used to adsorb the workpiece onto the placement plate 3. The adsorption component includes a mounting hole 31, a suction cup 32, a connecting pipe 33, a sealing pipe 34, a piston rod 35, a spring 36, a push plate 37, and an air outlet pipe 38. The mounting hole 31 is symmetrically opened on the top surface of the placement plate 3. The suction cup 32 is installed inside the mounting hole 31. The suction cup 32 is made of a blend of modified nitrile rubber and polyurethane, which can maintain good elasticity and adsorption performance even under frequent use, significantly extending its service life and reducing the frequency of replacement.

[0026] Connecting pipe 33 is connected to the bottom of suction cup 32, sealing pipe 34 is connected to the end of connecting pipe 33 away from suction cup 32, piston rod 35 is sealed and connected inside sealing pipe 34, spring 36 is fixedly connected to the end of sealing pipe 34 near piston rod 35, push plate 37 is fixedly connected to the end of piston rod 35 away from sealing pipe 34, and air outlet pipe 38 is connected to the end of sealing pipe 34 away from piston rod 35. Spring 36 is fixedly connected to push plate 37. Both air outlet pipe 38 and connecting pipe 33 are equipped with one-way valves. During the air extraction stage, the one-way valve in connecting pipe 33 opens, allowing air in suction cup 32 to be quickly drawn into sealing pipe 34 through connecting pipe 33. During processing, even if affected by external vibration or other interference factors, the one-way valve in connecting pipe 33 can prevent gas backflow, ensuring that suction cup 32 is always in a negative pressure adsorption state, avoiding a decrease in adsorption force due to gas leakage. When it is necessary to expel air from sealing pipe 34, the one-way valve in air outlet pipe 38 opens, allowing air to be expelled smoothly.

[0027] The positioning assembly is used for rapid workpiece positioning. The positioning assembly includes an electric telescopic rod 21, a hinge block 22, a connecting rod 23, a connecting block 24, a support rod 25, and a slide rail 26. The electric telescopic rod 21 is fixedly connected to the inside of the base plate 1. The hinge block 22 is fixedly connected to the telescopic end of the electric telescopic rod 21. The connecting rod 23 is symmetrically hinged inside the hinge block 22. The connecting block 24 is hinged to the end of the connecting rod 23 away from the hinge block 22. A protruding rod 4 is fixedly connected to the top surface of the hinge block 22. The support rod 25 is fixedly connected to the top surface of the connecting block 24. The slide rail 26 is opened inside the base plate 1. The hinge block 22 is slidably connected to the slide rail 26. The support rod 25 is fixedly connected to the positioning push block 2. The support rod 25 slides in the slide groove 11, providing stable guidance and support for the positioning push block 2, enabling the positioning push block 2 to move along a predetermined trajectory, thereby achieving precise positioning of workpieces of different sizes.

[0028] In this utility model, when the quick positioning fixture for lathe machining is working, the workpiece is first placed on the placement plate 3, and then the electric telescopic rod 21 fixed inside the base plate 1 is activated. Its telescopic end drives the hinge block 22 to slide in the slide rail 26. Through the transmission of the connecting rod 23, the connecting block 24 and the support rod 25 move in opposite directions in the slide groove 11, thereby driving the positioning push block 2 to quickly position the workpiece placed on the placement plate 3.

[0029] During the positioning process, the protruding rod 4 on the top of the hinge block 22 will gradually come into contact with the push plate 37, thereby driving the push plate 37 and the piston rod 35 to move. When the piston rod 35 moves backward in the sealing tube 34, the air in the suction cup 32 is drawn into the sealing tube 34 through the connecting tube 33, so that a negative pressure is formed in the suction cup 32, and the workpiece is firmly adsorbed under the action of atmospheric pressure.

[0030] After processing is completed, the positioning push block 2 is moved again by the electric telescopic rod 21, so that the convex rod 4 and the push plate 37 are gradually separated. Under the action of the spring 36, the push plate 37 and the piston rod 35 are reset. At this time, the one-way valve in the air outlet pipe 38 is opened to discharge the air, so that the air pressure in the suction cup 32 is restored, thereby releasing the adsorption on the workpiece so that the workpiece can be taken out.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick positioning fixture for lathe machining comprising a base plate (1), characterized in that, The top surface of the base plate (1) is symmetrically provided with sliding grooves (11), and the inner wall of each sliding groove (11) is slidably connected with a positioning push block (2). The top surface of the base plate (1) is fixedly connected with a placement plate (3). Also includes: A positioning component for rapidly positioning a workpiece; An adsorption assembly is used to adsorb workpieces onto a placement plate (3). The adsorption assembly includes a mounting hole (31), a suction cup (32), a connecting tube (33), a sealing tube (34), and a piston rod (35). The mounting hole (31) is symmetrically opened on the top surface of the placement plate (3). The suction cup (32) is installed inside the mounting hole (31). The connecting tube (33) is connected to the bottom of the suction cup (32). The sealing tube (34) is connected to the end of the connecting tube (33) away from the suction cup (32). The piston rod (35) is sealed and connected inside the sealing tube (34).

2. The quick positioning fixture for lathe machining according to claim 1, characterized in that, The adsorption assembly also includes a spring (36), a push plate (37), and an outlet pipe (38). The spring (36) is fixedly connected to the end of the sealing tube (34) near the piston rod (35). The push plate (37) is fixedly connected to the end of the piston rod (35) away from the sealing tube (34). The outlet pipe (38) is connected to the end of the sealing tube (34) away from the piston rod (35).

3. A quick positioning fixture for lathe machining according to claim 2, characterized in that, The spring (36) is fixedly connected to the push plate (37).

4. A quick positioning fixture for lathe machining according to claim 1, characterized in that, The positioning assembly includes an electric telescopic rod (21), a hinge block (22), a connecting rod (23), a connecting block (24), a support rod (25), and a slide rail (26). The electric telescopic rod (21) is fixedly connected to the inside of the base plate (1). The hinge block (22) is fixedly connected to the telescopic end of the electric telescopic rod (21). The connecting rod (23) is symmetrically hinged to the inside of the hinge block (22). The connecting block (24) is hinged to the end of the connecting rod (23) away from the hinge block (22). The support rod (25) is fixedly connected to the top surface of the connecting block (24). The slide rail (26) is opened inside the base plate (1).

5. A quick positioning fixture for lathe machining according to claim 4, characterized in that, The hinge block (22) is slidably connected to the slide rail (26), the support rod (25) is fixedly connected to the positioning push block (2), and the support rod (25) is placed in the slide groove (11) for sliding.

6. A quick positioning fixture for lathe machining according to claim 4, characterized in that, The top surface of the hinge block (22) is fixedly connected with a protruding rod (4).

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