Quick-mounting fixture for machining center

Abstract

This utility model discloses a quick-assembly fixture for machining centers, applied in the field of machining center technology. It includes a fixture base with four protective cylinders symmetrically bolted inside. Each of the four protective cylinders has a screw rotatably connected inside, and a second bevel gear is bolted to one end of each screw that is close to the others. The protective cylinders protect the screw surfaces, effectively preventing debris from getting stuck in the screw threads. Simultaneously, inclined grooves allow debris to automatically slide outwards from the fixture base, preventing debris accumulation inside and affecting clamping. By synchronously moving the four clamping plates closer or further apart, all four sides of the workpiece can be clamped simultaneously, eliminating the need for individual adjustments and improving clamping efficiency. Furthermore, each clamping plate has an adjustable, telescopic fixing cylinder inside, allowing independent adjustment for each side of the workpiece even when the four sides are unequal, improving practicality.

Description

Technical Field

[0001] This utility model belongs to the technical field of machining centers, and specifically relates to quick-assembly fixtures for machining centers. Background Technology

[0002] Machining center fixtures are specialized devices used to fix, position, and clamp workpieces on machining centers (CNC machine tools) to ensure that the workpieces remain in the correct position during machining.

[0003] Currently, Chinese utility model patent CN222493169U discloses a quick-setup fixture for machining centers. Existing quick-setup fixtures for machining centers have low clamping efficiency. They require independent adjustment of clamping plates in different directions by rotating screws according to the workpiece size, making it impossible for multiple clamping plates to simultaneously hold the workpiece. Furthermore, because the clamping plates are adjusted independently, even if the next workpiece is identical to the previous one, it is still necessary to adjust the clamping plates in different directions again after machining, which is cumbersome. Simultaneously, during machining inside the machining center, machining debris easily falls into the grooves inside the fixture. Since many fixtures use screw drives, debris easily gets stuck in the threaded grooves, causing jamming. Even in fixtures without screws, the grooves guide the clamping plates, so debris accumulation in the grooves also affects sliding, preventing the fixture from stably clamping the workpiece. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-release fixture for machining centers. Its advantages are that it can simultaneously clamp the workpiece on all four sides and independently adjust the clamping plates according to the shape of the workpiece, as well as prevent debris from falling into the fixture and affecting the screw, while also facilitating the removal of debris.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quick-release fixture for a machining center, including a fixture base, four protective cylinders symmetrically bolted inside the fixture base, each of the four protective cylinders being rotatably connected to a screw, and a second bevel gear being bolted to one end of each of the four screws that are close to each other. A motor is bolted to the center inside the fixture base, and a first bevel gear meshing with the second bevel gear is bolted to the output end of the motor. A sliding sleeve is slidably fitted onto the surface of each protective cylinder, and a threaded sleeve is threadedly fitted onto the surface of each screw. A strip groove is provided at the bottom of each protective cylinder to cooperate with the sliding sleeve and the threaded sleeve, and the bottom of the threaded sleeve passes through the strip groove and is fixedly connected to the sliding sleeve.

[0006] The above technical solution effectively prevents debris from getting stuck in the threads of the screw by protecting the screw surface with a protective sleeve. Simultaneously, the inclined grooves allow debris to automatically slide outwards from the fixture holder, preventing debris accumulation and interference with clamping. By synchronously moving the four clamping plates closer or further apart, all four sides of the workpiece can be clamped simultaneously, eliminating the need for individual adjustments and improving clamping efficiency. Furthermore, each clamping plate is equipped with an adjustable, telescopic fixing sleeve, allowing independent adjustment for each side of the workpiece even when its four sides are unequal, enhancing practicality.

[0007] The present invention is further configured such that a clamping plate is bolted to the top of the sliding sleeve and slidably connected to the clamping seat, a fixing cylinder is bolted to the side of the clamping plate away from the center of the clamping seat, a sliding plate is slidably connected inside the clamping plate, a fixing rod welded to the sliding plate is slidably connected inside the fixing cylinder, and a fastening bolt is threaded through the top of the fixing cylinder near the clamping plate.

[0008] The above technical solution allows for simultaneous clamping of all four sides of a workpiece without the need for individual adjustments, thus improving clamping efficiency. Furthermore, each clamping plate is equipped with a telescopically adjustable fixing cylinder, enabling independent adjustment for each side of the workpiece even when the four sides are unequal. This allows for stable clamping of the next workpiece if it matches the previous one after the previous one has been released, without the need for further adjustment of the fixing cylinder.

[0009] The present invention is further configured such that the inner cavity of the clamp seat has an inclined groove at the bottom of the protective cylinder.

[0010] Using the above technical solution, debris can slide outward through the inclined groove that slopes outward from the fixture seat, thus avoiding accumulation inside.

[0011] The present invention is further configured such that a detachable plate is bolted to the center of the top of the clamp seat.

[0012] By adopting the above technical solution, the center of the top of the fixture can be opened, thereby allowing for the maintenance, disassembly, and replacement of the internal components.

[0013] The present invention is further provided that the bottom of the motor is provided with a ventilation screen bolted to the clamp seat.

[0014] The above technical solution is used to ventilate and dissipate heat from the motor, while reducing the entry of dust and impurities into the motor.

[0015] The present invention is further provided that a pad is welded to both sides of the bottom of the fixture seat, and a bolt hole is provided at the bottom of the pad.

[0016] The above technical solution is used to support the fixture seat and improve its placement stability. Simultaneously, by creating bolt holes, bolts can engage with the threads of these holes, thereby bolting the fixture seat into place.

[0017] The present invention is further provided that an anti-slip pad is adhered to the side of the sliding plate near the center of the clamp seat.

[0018] The above technical solution increases the friction when the sliding plate adheres to the workpiece surface, thereby improving clamping stability.

[0019] In summary, this utility model has the following beneficial effects: 1. Protecting the screw surface with a protective sleeve effectively prevents debris from getting stuck in the screw threads. Simultaneously, the inclined grooves allow debris to automatically slide outwards from the fixture holder, preventing debris accumulation inside the fixture holder from affecting clamping. 2. By driving the four clamping plates to slide synchronously closer or further apart, the workpiece can be clamped on all four sides simultaneously, eliminating the need for individual adjustments and improving clamping efficiency. Furthermore, each clamping plate is equipped with an adjustable, telescopic fixing cylinder, allowing for independent adjustment of each side even when the workpiece has unequal sides, enhancing practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This is a partial structural cross-sectional view of the present invention.

[0021] Reference numerals: 1. Fixture base; 2. Protective cylinder; 3. Screw; 4. Sliding sleeve; 5. Motor; 6. First bevel gear; 7. Second bevel gear; 8. Threaded sleeve; 9. Clamping plate; 10. Fixed cylinder; 11. Sliding plate; 12. Fixed rod; 13. Fastening bolt; 14. Inclined groove; 15. Removable plate; 16. Ventilation mesh; 17. Pad plate; 18. Bolt hole; 19. Anti-slip pad. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1: refer to Figure 1 , Figure 2The machining center uses a quick-release fixture, including a fixture base 1. Four protective cylinders 2 are symmetrically bolted inside the fixture base 1. Each of the four protective cylinders 2 has a screw 3 rotatably connected inside. A second bevel gear 7 is bolted to the end of each screw 3 closest to each other. A motor 5 is bolted to the center inside the fixture base 1. A first bevel gear 6, meshing with the second bevel gear 7, is bolted to the output end of the motor 5. A sliding sleeve 4 is slidably fitted onto the surface of the protective cylinder 2. A threaded sleeve 8 is threadedly fitted onto the surface of the screw 3. A groove is formed at the bottom of the protective cylinder 2 to cooperate with the sliding sleeve 4 and the threaded sleeve 8. The bottom of the threaded sleeve 8 passes through the groove and is fixedly connected to the sliding sleeve 4. By protecting the surface of the screw 3 with the protective cylinders 2, debris can be effectively prevented from getting stuck in the threads of the screw 3. The inclined groove 14 allows debris to automatically slide out of the fixture base 1, preventing debris accumulation inside the fixture base 1 from affecting clamping.

[0024] refer to Figure 2 The inner cavity of the clamp seat 1 is located at the bottom of the protective cylinder 2 and has an inclined groove 14. Debris can slide outward through the inclined groove 14 that slopes outward from the clamp seat 1, thereby avoiding accumulation inside.

[0025] refer to Figure 1 , Figure 2 A removable plate 15 is bolted to the center of the top of the clamp base 1. The center of the top of the clamp base 1 can be opened to allow for maintenance, disassembly, and replacement of the internal components.

[0026] refer to Figure 2 The bottom of the motor 5 is equipped with a ventilation mesh 16 that is bolted to the clamp seat 1. This mesh is used to ventilate and dissipate heat from the motor 5, while also reducing the entry of dust and impurities into the motor.

[0027] refer to Figure 1 , Figure 2 Both sides of the bottom of the fixture base 1 are welded with pads 17, and bolt holes 18 are opened at the bottom of the pads 17. These are used to support the fixture base 1 and improve its placement stability. At the same time, the bolt holes 18 allow bolts to engage with the threads of the bolt holes 18, thereby bolting the fixture base 1 into place.

[0028] Brief description of the usage process: The workpiece is clamped and fixed on the top of the fixture base 1, and then the workpiece is machined by a cutting tool. When the workpiece chips fall into the interior of the fixture base 1, the protective sleeve 2 can protect the surface of the screw 3, thereby preventing the chips from getting stuck in the threads of the screw 3. At the same time, the inclined groove 14 allows the falling chips to slide out of the interior of the fixture base 1, thereby preventing the chips from accumulating inside the fixture base 1 and affecting the sliding sleeve 4.

[0029] Example 2: refer to Figure 1 , Figure 2 , Figure 3 The machining center uses a quick-assembly fixture. A clamping plate 9, slidably connected to the fixture base 1, is bolted to the top of the sliding sleeve 4. A fixed cylinder 10 is bolted to the side of the clamping plate 9 furthest from the center of the fixture base 1. A sliding plate 11 is slidably connected inside the clamping plate 9. A fixed rod 12, welded to the sliding plate 11, is slidably connected inside the fixed cylinder 10. A fastening bolt 13 is threaded through the top of the fixed cylinder 10 near the clamping plate 9. By driving the four clamping plates 9 to slide synchronously closer or further apart, all four sides of the workpiece can be clamped simultaneously without individual adjustment, improving clamping efficiency. Furthermore, each clamping plate 9 has an adjustable fixed cylinder 10 installed inside, allowing independent adjustment for each side even when the four sides of the workpiece are unequal. This means that after releasing one workpiece, if the next workpiece matches the previous one, the fixed cylinder 10 does not need to be adjusted again, allowing for stable clamping.

[0030] refer to Figure 1 , Figure 3 An anti-slip pad 19 is adhered to the side of the sliding plate 11 near the center of the fixture seat 1. This increases the friction when the sliding plate 11 is in contact with the workpiece surface, thereby improving clamping stability.

[0031] Brief description of the usage process: By turning on the motor 5, the first bevel gear 6 is driven to rotate, and after the first bevel gear 6 meshes with the second bevel gear 7, it synchronously drives the four screws 3 to rotate inside the protective cylinder 2. This causes the threaded sleeve 8 to engage with the rotating screws 3, driving the sliding sleeve 4 to slide on the surface of the protective cylinder 2. This allows the four clamping plates 9 at the top of the sliding sleeve 4 to slide closer or further apart. When sliding closer together, the workpiece can be simultaneously clamped and fixed on the top of the fixture base 1 from all four sides. Then, by loosening the fastening bolt 13, the sliding plate 11 and the fixing rod 12 are pulled to slide inside the clamping plate 9 and the fixing cylinder 10. This allows for independent adjustment based on each side when the four sides of the workpiece are unequal, and the fastening bolt 13 can be tightened by rotating it, ensuring that the sliding plate 11 fits tightly against the workpiece surface.

[0032] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. Quick mounting fixture for machining center, comprising a fixture base (1), characterized in that: Four protective cylinders (2) are symmetrically bolted inside the clamp seat (1). Each of the four protective cylinders (2) is rotatably connected to a screw (3). A second bevel gear (7) is bolted to one end of each of the four screws (3) that is close to each other. A motor (5) is bolted to the center inside the clamp seat (1). A first bevel gear (6) that meshes with the second bevel gear (7) is bolted to the output end of the motor (5). A sliding sleeve (4) is slidably fitted on the surface of the protective cylinder (2). A threaded sleeve (8) is threadedly fitted on the surface of the screw (3). A strip groove is provided at the bottom of the protective cylinder (2) to cooperate with the sliding sleeve (4) and the threaded sleeve (8). The bottom of the threaded sleeve (8) passes through the strip groove and is fixedly connected to the sliding sleeve (4).

2. The quick-mounting fixture for machining centers according to claim 1, characterized in that: The top of the sliding sleeve (4) is bolted with a clamping plate (9) that is slidably connected to the clamping seat (1). A fixing cylinder (10) is bolted to the side of the clamping plate (9) away from the center of the clamping seat (1). A sliding plate (11) is slidably connected inside the clamping plate (9). A fixing rod (12) welded to the sliding plate (11) is slidably connected inside the fixing cylinder (10). A fastening bolt (13) is threaded through the top of the fixing cylinder (10) near the clamping plate (9).

3. The quick-mounting fixture for machining center according to claim 1, characterized in that: The inner cavity of the clamp seat (1) is located at the bottom of the protective cylinder (2) and has an inclined groove (14).

4. The quick-mounting fixture for machining center according to claim 1, characterized in that: A detachable plate (15) is bolted to the center of the top of the clamp seat (1).

5. The quick-change fixture for machining centers according to claim 1, characterized in that: The bottom of the motor (5) is provided with a ventilation screen (16) that is bolted to the clamp seat (1).

6. The quick-change fixture for machining centers according to claim 1, characterized in that: Both sides of the bottom of the fixture seat (1) are welded with pads (17), and bolt holes (18) are opened at the bottom of the pads (17).

7. The quick-change fixture for machining centers according to claim 2, characterized in that: An anti-slip pad (19) is attached to the side of the sliding plate (11) near the center of the clamp seat (1).

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