A machining device for machining positioning holes in CNC machine tools.

Abstract

This utility model discloses a machining device for positioning holes in CNC machining fixtures, relating to the field of positioning hole machining technology. It includes a worktable with an adjustment component inside, and a U-shaped frame fixed to the top of the worktable. A movable plate is slidably connected to the inner wall of the U-shaped frame, and an oil spraying component is located at the top of the movable plate. The adjustment component includes a fixed seat fixed to the center of the top of the worktable. This utility model achieves positioning and fixing of the positioning hole by inserting a positioning pin into the positioning hole in the part. When the tapered shaft rises, multiple sets of ball joints compress the return spring and extend from inside the positioning pin until the end face of the ball joint abuts against the inner wall of the positioning hole in the part. This effectively adapts to changes in the diameter of the positioning hole, ensuring precise alignment between the part and the tool, thereby improving machining accuracy, enhancing the versatility and flexibility of the device, avoiding frequent replacement of positioning pins of different sizes, simplifying the operation process, and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of positioning hole processing technology, specifically a processing device for positioning holes in CNC machine tool fixtures. Background Technology

[0002] Machining locating holes is an important step in machining, primarily used to ensure the stability and accuracy of the workpiece during processing. Existing fixture locating methods use one side (the rough surface) and two pins (round pins or diamond pins).

[0003] The existing patent (publication number: CN221676400U) discloses a processing device for positioning holes in CNC machining fixtures. It can stably clamp the workpiece by means of the cooperation of the pressure block and the positioning seat. With the cooperation of the positioning pin and the positioning component, the stability of the overall processing procedure is guaranteed and the processing quality of the workpiece is guaranteed. It has good practicality.

[0004] However, the above technical solution still has certain defects. The device positions the positioning holes of the parts by positioning pins, but the diameter of the positioning holes of some parts is different. When machining the positioning holes, it is necessary to replace the matching positioning pins, which lacks certain applicability and reduces production efficiency. Therefore, a machining device for positioning holes of CNC machine tool fixtures is proposed. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a machining device for positioning holes in CNC machining fixtures, so as to solve the technical problem mentioned in the background that it is impossible to position positioning holes of different diameters.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a processing device for machining positioning holes of fixtures in CNC machining, comprising a worktable, an adjustment component inside the worktable, a U-shaped frame fixed at the top of the worktable, a movable plate slidably connected to the inner wall of the U-shaped frame, and an oil spraying component at the top of the movable plate;

[0007] The adjustment assembly includes a fixed base fixed to the center of the top of the workbench. A positioning pin is slidably connected inside the fixed base. A limit seat is fixed to the bottom end of the positioning pin, and a tapered shaft is slidably connected inside the positioning pin. Multiple sets of circular grooves are formed inside the positioning pin. A ball joint rod slides inside the circular groove. A ring is fixed to one side of the curved outer wall of the ball joint rod. A return spring installed inside the circular groove is provided on one side of the ring. A limit spring is fixed to the bottom end of the limit seat. A first inclined block is fixed to the bottom end of the tapered shaft at the bottom end of the limit spring. A second inclined block is provided on one side of the first inclined block. A threaded screw is provided on the side of the second inclined block away from the first inclined block. Two sets of spring telescopic rods are attached to the lower end of the curved surface of the threaded screw, and a connecting plate is rotatably connected to one side of the curved surface of the threaded screw.

[0008] As a preferred technical solution, an electric push rod is installed at the top of the U-shaped frame, and a housing is fixed to the movable end of the electric push rod. The housing is fixed to the movable plate, and a servo motor is installed inside the housing. A cutting tool is installed at the output end of the servo motor, and fixing mechanisms are provided on both sides of the bottom end of the movable plate.

[0009] As a preferred technical solution, the top of the fixed base is provided with a clearance groove for the movement of the ball head.

[0010] As a preferred technical solution, the ball joint rod circular shaft array is distributed inside the positioning pin, and one end of the ball joint rod abuts against the upper end of the outer wall of the conical shaft curved surface.

[0011] As a preferred technical solution, two sets of T-shaped sliders are fixed on one side of the connecting plate. The T-shaped sliders are slidably connected to one side of the worktable. One end of the threaded screw passes through one side of the worktable and is provided with a knob.

[0012] As a preferred technical solution, the oil injection assembly includes a piston cylinder fixed to one side of the top of the movable plate, a piston rod slidably connected to the inner wall of the piston cylinder, a helical spring sleeved on the surface of the piston rod, an L-shaped tube penetrating the movable plate on one side of the piston cylinder, a nozzle at the end of the L-shaped tube away from the piston cylinder, a horizontal tube connected to the end of the piston cylinder away from the L-shaped tube, and an oil reservoir at the end of the horizontal tube away from the piston cylinder.

[0013] As a preferred technical solution, the nozzle is positioned directly opposite the cutter, and one-way valves are installed at the connection ends of the L-shaped tube, the horizontal tube, and the piston cylinder.

[0014] In summary, the present invention has the following main advantages:

[0015] 1. This utility model inserts a locating pin into a locating hole in a part. When the tapered shaft rises, multiple sets of ball joints compress the return spring and extend from inside the locating pin until the end face of the ball joint abuts against the inner wall of the locating hole in the part, thereby achieving the limiting and fixing of the locating hole. It can effectively adapt to changes in the diameter of the locating hole, ensuring precise alignment between the part and the tool, thereby improving machining accuracy, enhancing the versatility and flexibility of the device, avoiding frequent replacement of locating pins of different sizes, simplifying the operation process, and improving production efficiency.

[0016] 2. This utility model uses an electric push rod to raise the moving plate, allowing lubricating oil to be sprayed from the nozzle onto the cutting tool through an L-shaped pipe. When the cutting tool processes the positioning hole, an oil film is formed between the cutting tool and the hole wall, reducing direct metal-to-metal contact, thereby reducing friction and wear, avoiding the risk of cutting tool breakage during processing, and extending the tool's service life. It also avoids the high temperatures generated during processing, preventing overheating that could lead to a decline in processing quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall components of this utility model;

[0018] Figure 2 This is a schematic diagram of the interior of the workbench of this utility model;

[0019] Figure 3 This is a schematic diagram of the adjustment component of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the positioning pin of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is a schematic diagram of the oil injection assembly of this utility model.

[0023] In the diagram: 100, worktable; 110, U-shaped frame; 120, moving plate; 130, electric actuator; 140, housing; 150, servo motor; 160, cutting tool; 170, fixing mechanism;

[0024] 200. Adjustment component; 210. Fixed base; 211. Clearance groove; 220. Positioning pin; 221. Limiting seat; 230. Tapered shaft; 240. Ball joint rod; 241. Circular groove; 250. Circular ring; 260. Return spring; 270. Limiting spring; 280. First inclined block; 290. Second inclined block; 2910. Threaded screw; 2911. Knob; 2920. Spring telescopic rod; 2930. Connecting plate; 2931. T-shaped slider;

[0025] 300. Injection assembly; 310. Piston cylinder; 320. Piston rod; 330. Coil spring; 340. L-shaped tube; 350. Nozzle; 360. Horizontal tube; 370. Oil reservoir. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] A machining apparatus for machining positioning holes in CNC machine tools, such as Figure 1-6 As shown, the device includes a workbench 100, an adjustment assembly 200 inside the workbench 100, and a U-shaped frame 110 fixed at the top of the workbench 100. A movable plate 120 is slidably connected to the inner wall of the U-shaped frame 110, and an oil spraying assembly 300 is provided at the top of the movable plate 120.

[0029] The adjustment assembly 200 includes a fixed base 210 fixed to the center of the top of the worktable 100. A positioning pin 220 is slidably connected inside the fixed base 210. A limit seat 221 is fixed to the bottom end of the positioning pin 220, and a tapered shaft 230 is slidably connected inside the positioning pin 220. Multiple sets of circular grooves 241 are formed inside the positioning pin 220. A ball joint rod 240 slides inside the circular grooves 241. A circular ring 250 is fixed to one side of the curved outer wall of the ball joint rod 240. One side of the circular ring 250 is provided with a part installed in the circular groove 241. The return spring 260 of the part is fixed at the bottom of the limiting seat 221, and the limiting spring 270 is fixed at the bottom of the limiting spring 270. The first inclined block 280 is fixed at the bottom of the tapered shaft 230. The first inclined block 280 is provided with a matching second inclined block 290 on one side. The second inclined block 290 is provided with a threaded rod 2910 on the side away from the first inclined block 280. The lower end of the curved surface of the threaded rod 2910 is attached to two sets of spring telescopic rods 2920, and a connecting plate 2930 is rotatably connected to one side of the curved surface of the threaded rod 2910.

[0030] The operator places the part to be processed on the fixed seat 210, inserts the locating pin 220 into the locating hole in the part, and then rotates the threaded screw 2910, causing it to rotate and move through the connecting plate 2930. As the threaded screw 2910 moves, it drives the second inclined block 290 to move synchronously, causing the second inclined block 290 to abut against the first inclined block 280 and rise. When the first inclined block 280 rises, it compresses the limiting spring 270 and drives the tapered shaft 230 to move synchronously upward within the locating pin 220. As the tapered shaft 230 rises, multiple sets of ball joints 240 abut against the inclined surface of the tapered shaft 230. The compression return spring 260 extends from inside the positioning pin 220 until the end face of the ball head rod 240 abuts against the inner wall of the positioning hole of the part, thereby limiting and fixing the positioning hole. It can effectively adapt to the diameter change of the positioning hole, ensuring the precise alignment of the part and the tool 160, thereby improving the machining accuracy, improving the versatility and flexibility of the device, avoiding frequent replacement of positioning pins 220 of different sizes, simplifying the operation process, and improving production efficiency. When the tool 160 rotates and descends to machine the positioning hole, the tool 160 will apply force to the positioning pin 220 when it descends, causing the positioning pin 220 to disengage from the positioning hole until the positioning hole is machined.

[0031] Please refer to this carefully. Figure 1 An electric push rod 130 is installed at the top of the U-shaped frame 110. A housing 140 is fixed at the end of the movable rod of the electric push rod 130. The housing 140 is fixed to the movable plate 120, and a servo motor 150 is installed inside the housing 140. A cutting tool 160 is installed at the output end of the servo motor 150. Fixing mechanisms 170 are provided on both sides of the bottom end of the movable plate 120.

[0032] By activating the electric push rod 130, the housing 140 is moved, causing the housing 140 to slide the moving plate 120 within the U-shaped frame 110. When it descends to a certain position, the part is fixed by the fixing mechanism 170. Then, the servo motor 150 is activated to drive the tool 160 to rotate, thereby realizing the machining of the positioning hole of the part.

[0033] Please refer to this carefully. Figures 1 to 5 The top of the fixed base 210 is provided with a clearance groove 211 for the ball head rod 240 to move. The ball head rod 240 is arranged in a circular shaft array inside the positioning pin 220, and one end of the ball head rod 240 abuts against the upper end of the curved outer wall of the tapered shaft 230. Two sets of T-shaped sliders 2931 are fixed on one side of the connecting plate 2930. The T-shaped sliders 2931 are slidably connected to one side of the worktable 100. One end of the threaded screw 2910 passes through one side of the worktable 100 and is provided with a knob 2911.

[0034] By setting the T-shaped slider 2931, the threaded screw 2910 can be prevented from rotating synchronously when rotating, and it can also slide on the outside of the worktable 100. The knob 2911 makes it convenient for the operator to rotate the threaded screw 2910.

[0035] Please refer to this carefully. Figure 1 , Figure 2 and Figure 6 The oil injection assembly 300 includes a piston cylinder 310 fixed to one side of the top of the movable plate 120. A piston rod 320 is slidably connected to the inner wall of the piston cylinder 310. A helical spring 330 is sleeved on the surface of the piston rod 320. An L-shaped tube 340 is provided on one side of the piston cylinder 310, penetrating the movable plate 120. A nozzle 350 is provided at the end of the L-shaped tube 340 away from the piston cylinder 310. A horizontal tube 360 ​​is connected to the end of the piston cylinder 310 away from the L-shaped tube 340. An oil reservoir 370 is provided at the end of the horizontal tube 360 ​​away from the piston cylinder 310. The nozzle 350 is directly opposite the cutter 160. One-way valves are installed at the connection ends of the L-shaped tube 340, the horizontal tube 360 ​​and the piston cylinder 310.

[0036] When machining the positioning hole of the part is required, the electric push rod 130 causes the housing 140 to drive the moving plate 120 to rise, so that the top of the piston rod 320 abuts against the top of the inner wall of the U-shaped frame 110. Then, the piston rod 320 is stressed and stretches the helical spring 330 and squeezes the lubricating oil inside the piston cylinder 310. The lubricating oil is sprayed from the nozzle 350 to the tool 160 through the L-shaped tube 340. When the tool 160 is machining the positioning hole, an oil film is formed between the tool 160 and the hole wall, reducing the direct contact between metals, thereby reducing friction and wear, avoiding the risk of tool 160 breaking during machining, and extending the service life of tool 160. At the same time, it also avoids the high temperature generated during the machining process and prevents the machining quality from deteriorating due to overheating.

[0037] In use, the electric push rod 130 raises the moving plate 120, causing lubricating oil to be sprayed from the nozzle 350 through the L-shaped pipe 340 onto the tool 160. When the tool 160 processes the positioning hole, an oil film forms between the tool 160 and the hole wall, reducing direct metal-to-metal contact, thereby reducing friction and wear, avoiding the risk of tool 160 breakage during processing, and extending the service life of the tool 160. It also avoids the high temperatures generated during processing, preventing overheating and resulting in a decrease in processing quality. The part to be processed is placed on the fixed seat 210, and the positioning pin 220 is inserted into the part. When the tapered shaft 230 rises, multiple sets of ball joints 240 compress the return spring 260 and extend from inside the positioning pin 220 until the end face of the ball joint 240 abuts against the inner wall of the positioning hole of the part, thereby limiting and fixing the positioning hole. It can effectively adapt to the diameter change of the positioning hole, ensuring the precise alignment of the part and the tool 160, thereby improving the machining accuracy, improving the versatility and flexibility of the device, avoiding frequent replacement of positioning pins 220 of different sizes, simplifying the operation process, and improving production efficiency. The parts not involved in this device are the same as or can be implemented using existing technology.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A machining apparatus for machining positioning holes in fixtures using CNC machining, comprising a worktable (100), characterized in that: The workbench (100) is provided with an adjustment component (200) inside, and a U-shaped frame (110) is fixed at the top of the workbench (100). A movable plate (120) is slidably connected to the inner wall of the U-shaped frame (110), and an oil spraying component (300) is provided at the top of the movable plate (120). The adjustment assembly (200) includes a fixed seat (210) fixed to the top center of the workbench (100). A positioning pin (220) is slidably connected inside the fixed seat (210). A limit seat (221) is fixed to the bottom end of the positioning pin (220), and a tapered shaft (230) is slidably connected inside the positioning pin (220). Multiple sets of circular grooves (241) are opened inside the positioning pin (220). A ball joint rod (240) slides inside the circular groove (241). A ring (250) is fixed to one side of the curved outer wall of the ball joint rod (240). A ring (250) is provided on one side of the ring (250) and installed in the circular groove (221). 41) The internal reset spring (260) has a limit spring (270) fixed at the bottom of the limit seat (221). The bottom of the limit spring (270) is provided with a first inclined block (280) fixed to the bottom of the tapered shaft (230). A second inclined block (290) is provided on one side of the first inclined block (280). A threaded screw (2910) is provided on the side of the second inclined block (290) away from the first inclined block (280). Two sets of spring telescopic rods (2920) are attached to the lower end of the curved surface of the threaded screw (2910), and a connecting plate (2930) is rotatably mounted on one side of the curved surface of the threaded screw (2910).

2. The machining device for machining positioning holes in CNC machine tools according to claim 1, characterized in that: An electric push rod (130) is installed at the top of the U-shaped frame (110). A housing (140) is fixed at the end of the movable rod of the electric push rod (130). The housing (140) is fixed to the movable plate (120). A servo motor (150) is installed inside the housing (140). A cutting tool (160) is installed at the output end of the servo motor (150). Fixing mechanisms (170) are provided on both sides of the bottom end of the movable plate (120).

3. The machining device for machining positioning holes in CNC machine tools according to claim 1, characterized in that: The top of the fixed base (210) is provided with a clearance groove (211) for the ball head rod (240) to move.

4. The machining device for machining positioning holes in CNC machine tools according to claim 1, characterized in that: The ball joint (240) is arranged in a circular shaft array inside the positioning pin (220), and one end of the ball joint (240) abuts against the upper end of the outer wall of the curved surface of the tapered shaft (230).

5. The machining device for machining positioning holes in CNC machine tools according to claim 1, characterized in that: Two sets of T-shaped sliders (2931) are fixed on one side of the connecting plate (2930). The T-shaped sliders (2931) are slidably connected to one side of the worktable (100). One end of the threaded screw (2910) passes through one side of the worktable (100) and is provided with a knob (2911).

6. The machining device for machining positioning holes in CNC machine tools according to claim 1, characterized in that: The fuel injection assembly (300) includes a piston cylinder (310) fixed to one side of the top of the movable plate (120). A piston rod (320) is slidably connected to the inner wall of the piston cylinder (310). A helical spring (330) is sleeved on the surface of the piston rod (320). An L-shaped tube (340) penetrating the movable plate (120) is provided on one side of the piston cylinder (310). A nozzle (350) is provided at one end of the L-shaped tube (340) away from the piston cylinder (310). A horizontal tube (360) is connected to one end of the piston cylinder (310) away from the L-shaped tube (340). An oil reservoir (370) is provided at one end of the horizontal tube (360) away from the piston cylinder (310).

7. The machining apparatus for machining positioning holes in CNC machine tools according to claim 6, characterized in that: The nozzle (350) is directly opposite the cutter (160), and one-way valves are installed at the connection ends of the L-shaped tube (340), the horizontal tube (360) and the piston cylinder (310).

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