Universal jig for precision machining

Abstract

The utility model discloses a universal jig for precision machining, and relates to the technical field of machining jigs, the universal jig comprises a table body, a stepped ring groove is reserved in the top of the table body, a clamping assembly extending into the stepped ring groove is arranged at the top of the table body, and a gear motor for driving the clamping assembly to rotate is assembled on the lower inner wall of the stepped ring groove; the clamping assembly comprises a face disc arranged in the stepped ring groove in a sleeved mode, three sets of U-shaped bases are fixed to the top of the face disc in a ring array shape, and two sets of lug plates are assembled on the inner side of each set of U-shaped bases. According to the utility model, the three groups of U seats are arranged on the surface disc, so that continuous processing of plates with multiple groups of sizes can be met, the application range of the jig is expanded, meanwhile, the rotating force of the surface disc is utilized, the aim of automatically clamping and releasing the plates can be fulfilled, the time spent on dismounting and mounting the plates can be shortened, the plate clamping efficiency is improved, and the production cost is reduced. And the working efficiency of plate processing treatment is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically a general-purpose fixture for precision machining. Background Technology

[0002] Fixtures are a broad category of tools used in woodworking, metalworking, fitter work, machinery, electrical control, and other handicrafts. They are primarily used to assist in controlling position or movement (or both). Fixtures can be divided into three categories: process assembly fixtures, project testing fixtures, and circuit board testing fixtures. Clamps belong to the process assembly fixture category.

[0003] Traditional machining fixtures can only clamp and position one part at a time. After the part is finished, it must be removed and re-clamped. The time spent on disassembling and reassembling parts cannot be saved, resulting in low machining progress. When dealing with batch machining of parts, frequent disassembly and reassembly waste a lot of time, resulting in low overall machining efficiency. Therefore, a general-purpose fixture for precision machining is proposed. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a general-purpose fixture for precision machining to solve the technical problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a general-purpose fixture for precision machining, comprising a table body, wherein a stepped annular groove is reserved on the top of the table body, and a clamping assembly extending into the stepped annular groove is provided on the top of the table body, wherein a reduction motor for driving the clamping assembly to rotate is assembled on the lower inner wall of the stepped annular groove.

[0006] The clamping assembly includes a faceplate fitted inside a stepped annular groove. The top of the faceplate is fixed with three sets of U-shaped seats in a ring array. Each set of U-shaped seats has two sets of ear plates mounted on its inner side. The bottom of the faceplate is fixed with two sets of positioning plates directly below each set of U-shaped seats. A bidirectional lead screw is rotatably mounted between the two sets of positioning plates. The outer wall of the bidirectional lead screw is threaded with two sets of slave blocks. The top of the slave blocks is fixed with an L-arm connected to the bottom of the ear plate. The bottom of the faceplate has a first clearance groove for the L-arm to move. One end of the bidirectional lead screw extends to the outside of the positioning plate and is fitted with a gear. The inner wall of the stepped annular groove is fixed with two sets of arc-shaped racks that mesh with the gear.

[0007] As a preferred technical solution, the two sets of arc-shaped racks are arranged in an opposing position, and the two sets of arc-shaped racks drive the gear to rotate in opposite directions respectively.

[0008] As a preferred technical solution, the inner wall of the stepped annular groove is connected to the bottom of the dial and is provided with multiple sets of auxiliary rollers, which are arranged in a ring array.

[0009] As a preferred technical solution, a second clearance groove is provided on the top of the U-shaped seat at a position corresponding to the first clearance groove, and the size of the second clearance groove is equal to that of the first clearance groove.

[0010] As a preferred technical solution, a pair of blind holes are provided on both sides of the U-shaped seat, and L-shaped side strips are assembled on both sides of the U-shaped seat. The side of the L-shaped side strips is fixedly and slidably connected to the damping rod in the blind hole.

[0011] As a preferred technical solution, a clamping plate is welded to the outer wall of the ear plate, and the clamping plate is fixed to the top of the L-arm by bolts. Multiple sets of bolt holes are equally spaced on the top of the L-arm.

[0012] As a preferred technical solution, a U-shaped blocking plate is fixed at the top of the platform behind the clamping assembly.

[0013] In summary, the present invention has the following main advantages:

[0014] This utility model, with its three U-shaped seats on the dial, can meet the continuous processing of multiple sizes of sheet metal, thereby increasing the applicability of the fixture. At the same time, by utilizing the force of the dial's rotation, it can automatically clamp and release the sheet metal, reducing the time spent on assembling and disassembling the sheet metal, thus improving the efficiency of sheet metal clamping and processing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the three-dimensional unfolded structure of this utility model;

[0017] Figure 3 This is a top view of the platform structure of this utility model;

[0018] Figure 4 This is a bottom view of the faceplate of this utility model;

[0019] Figure 5 This is a diagram showing the unfolded internal structure of the U-shaped base of this utility model.

[0020] In the diagram: 100, platform; 200, clamping assembly;

[0021] 110. Stepped annular groove; 120. Gear motor; 130. Arc-shaped rack

[0022] 210. Face plate; 211. First clearance groove; 220. U-shaped seat; 221. Second clearance groove; 222. Blind hole; 230. Two-way lead screw; 240. Sleeve block; 241. L-arm; 242. Bolt hole; 250. Gear; 260. Positioning plate; 270. L-shaped edge strip; 271. Damping rod; 280. Ear plate; 281. Clamping plate. Detailed Implementation

[0023] 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.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A general-purpose fixture for precision machining, such as Figures 1 to 5 As shown, it includes a platform 100, a stepped annular groove 110 reserved on the top of the platform 100, a clamping assembly 200 extending into the stepped annular groove 110 on the top of the platform 100, and a reduction motor 120 for driving the clamping assembly 200 to rotate is mounted on the lower inner wall of the stepped annular groove 110.

[0026] The clamping assembly 200 includes a face plate 210 fitted inside the stepped annular groove 110. The top of the face plate 210 is fixed with three sets of U-shaped seats 220 in a ring array. Each set of U-shaped seats 220 is fitted with two sets of ear plates 280 on its inner side. The bottom of the face plate 210 is fixed with two sets of positioning plates 260 directly below each set of U-shaped seats 220. A bidirectional lead screw 230 is rotatably provided between the two sets of positioning plates 260. The outer wall of the bidirectional lead screw 230 is threaded with two sets of slave blocks 240. The top of the slave blocks 240 is fixed with an L-arm 241 connected to the bottom of the ear plate 280. The bottom of the face plate 210 is provided with a first clearance groove 211 for the L-arm 241 to move. One end of the bidirectional lead screw 230 extends to the outside of the positioning plate 260 and is fitted with a gear 250. The inner wall of the stepped annular groove 110 is fixed with two sets of arc-shaped racks 130 that mesh with the gear 250.

[0027] Two sets of arc-shaped racks 130 are set in an opposing position, and the two sets of arc-shaped racks 130 drive the gear 250 to rotate in opposite directions respectively;

[0028] The outer wall of the ear plate 280 is welded with a clamping plate 281, which is fixed to the top of the L-arm 241 with bolts. Multiple sets of bolt holes 242 are equally spaced on the top of the L-arm 241.

[0029] (The three sets of clamps located on the top of the faceplate 210 are arranged counterclockwise, namely clamp positions 1, 2 and 3, with clamp position 1 being the one closest to the front surface of the platform 100.) The plate to be processed is placed in the U-shaped seat 220. At this time, the geared motor 120 is controlled to work, and its output end drives the faceplate 210 to rotate, causing clamp position 1 to rotate counterclockwise. At this time, the gear 250 on the end face of the bidirectional lead screw 230 contacts and meshes with one of the sets of arc-shaped racks 130. The gear 250 begins to roll forward along the bottom of the arc-shaped rack 130, and the bidirectional lead screw 230 rotates synchronously in the same direction, causing the two sets of sleeve blocks 240 on the outer wall to move closer to each other, so that the clamping plate 281 gradually fits against the plate. When the gear 250 separates from the arc-shaped rack 130, the two sets of clamping plates 281 complete the purpose of clamping and positioning the plate. At this time, the plate has been moved to the area to be processed and is ready for processing.

[0030] Meanwhile, the third clamp position rotates to a position close to the front surface of the platform 100. At this time, the plate is placed in the U-shaped seat 220 to wait for the plate of the first clamp position to be processed. The geared motor 120 can be controlled to work, and the second clamp position rotates to a position close to the front surface of the platform 100 to cut and place the plate. Finally, the plate of the first clamp position will rotate to a position close to the front surface of the platform 100. During this process, the gear 250 will contact another set of arc-shaped racks 130. At this time, the gear 250 will roll on the top of the arc-shaped rack 130 and drive the bidirectional lead screw 230 to rotate in the opposite direction, so that the two sets of sleeve blocks 240 move away from the outer wall of the bidirectional lead screw 230, so that the clamping plate 281 no longer clamps the plate. When it rotates to a position close to the front surface of the platform 100, it is easy to directly remove and place a brand new plate, thereby eliminating the manual locking step and indirectly improving the processing efficiency of the clamp on the plate.

[0031] The distance between the two sets of clamping plates 281 can be controlled according to the size of the plate. The bolts can be loosened with a tool to align the ear plate 280 with the bolt hole 242 at the top of the L arm 241. Finally, the bolts can be screwed in, so that the fixture can meet the processing of plates of various sizes.

[0032] Please refer to this carefully. Figure 2 and Figure 3 The inner wall of the stepped annular groove 110 contacts the bottom of the face plate 210 and is equipped with multiple sets of auxiliary rollers, which are arranged in a ring array.

[0033] The auxiliary roller reduces the friction generated at the bottom of the rotating disc 210, thereby extending the service life of the disc 210.

[0034] Please refer to this carefully. Figure 5A second clearance groove 221 is provided on the top of the U-shaped seat 220 at a position corresponding to the first clearance groove 211. The size of the second clearance groove 221 is equal to that of the first clearance groove 211.

[0035] The L-arm 241 can move closer or further away from each other along the two sets of clearance grooves, and the auxiliary clamping plate 281 can clamp and position the plate.

[0036] Please refer to this carefully. Figure 5 A pair of blind holes 222 are provided on both sides of the U-shaped seat 220. L-shaped strips 270 are installed on both sides of the U-shaped seat 220. The sides of the L-shaped strips 270 are fixedly and slidably connected to the damping rods 271 in the blind holes 222.

[0037] The L-strip 270 serves to laterally constrain the sheet material placed inside the U-shaped base 220, preventing it from shifting due to the rotation of the faceplate 210. At the same time, the position of the L-strip 270 can be changed by the damping rod 271, thus making it suitable for sheet materials of various sizes. The damping rod 271 also improves the stability of the L-strip 270, better constraining the sheet material.

[0038] Please refer to this carefully. Figure 1 and Figure 2 A U-shaped baffle is fixed to the top of the platform 100 at the rear of the clamping assembly 200.

[0039] This helps to block debris generated during board processing, preventing it from splashing onto the floor and requiring extra time for manual cleaning.

[0040] In use, (the three sets of clamps located on the top of the faceplate 210 are arranged counterclockwise, namely clamp positions 1, 2 and 3, with clamp position 1 being the one closest to the front surface of the platform 100), the plate to be processed is placed in the U-shaped seat 220. At this time, the geared motor 120 is controlled to work, and its output end drives the faceplate 210 to rotate, causing clamp position 1 to rotate counterclockwise. At this time, the gear 250 on the end face of the bidirectional lead screw 230 contacts and meshes with one of the sets of arc-shaped racks 130. The gear 250 begins to roll forward along the bottom of the arc-shaped rack 130, and the bidirectional lead screw 230 rotates synchronously in the same direction, causing the two sets of sleeve blocks 240 on the outer wall to move closer to each other, so that the clamping plate 281 gradually fits against the plate. When the gear 250 separates from the arc-shaped rack 130, the two sets of clamping plates 281 complete the purpose of clamping and positioning the plate. At this time, the plate has been moved to the area to be processed and is ready for processing.

[0041] Meanwhile, the third clamp position rotates to a position close to the front surface of the platform 100. At this time, the plate is placed in the U-shaped seat 220 to wait for the plate of the first clamp position to be processed. The geared motor 120 can be controlled to work, and the second clamp position rotates to a position close to the front surface of the platform 100 to cut and place the plate. Finally, the plate of the first clamp position will rotate to a position close to the front surface of the platform 100. During this process, the gear 250 will contact another set of arc-shaped racks 130. At this time, the gear 250 will roll on the top of the arc-shaped rack 130 and drive the bidirectional lead screw 230 to rotate in the opposite direction, causing the two sets of sleeve blocks 240 to move away from the outer wall of the bidirectional lead screw 230, so that the clamping plate 281 no longer clamps the plate. When it rotates to a position close to the front surface of the platform 100, it is easy to directly remove and place a brand new plate, thereby eliminating the manual locking step and indirectly improving the processing efficiency of the clamp for the plate. The parts not mentioned in this device are the same as or can be implemented using existing technology.

[0042] 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 general-purpose fixture for precision machining, comprising a platform (100), characterized in that: The top of the platform (100) is provided with a stepped annular groove (110), and the top of the platform (100) is provided with a clamping assembly (200) extending into the stepped annular groove (110). The lower inner wall of the stepped annular groove (110) is equipped with a reduction motor (120) that drives the clamping assembly (200) to rotate. The clamping assembly (200) includes a face plate (210) fitted inside a stepped annular groove (110). Three sets of U-shaped seats (220) are fixed in a ring array at the top of the face plate (210). Two sets of ear plates (280) are fitted inside each set of U-shaped seats (220). Two sets of positioning plates (260) are fixed at the bottom of the face plate (210) directly below each set of U-shaped seats (220). A bidirectional lead screw (230) is rotatably mounted between the two sets of positioning plates (260). The outer wall is threaded with two sets of slave blocks (240). The top of the slave block (240) is fixed with an L-arm (241) connected to the bottom of the ear plate (280). The bottom of the face plate (210) is provided with a first clearance groove (211) for the L-arm (241) to move. One end of the bidirectional lead screw (230) extends to the outside of the positioning plate (260) and is equipped with a gear (250). The inner wall of the stepped annular groove (110) is fixed with two sets of arc-shaped racks (130) that mesh with the gear (250).

2. The general-purpose jig for precision machining according to claim 1, characterized in that: The two sets of arc-shaped racks (130) are arranged in an opposing position, and the two sets of arc-shaped racks (130) drive the gear (250) to rotate in opposite directions respectively.

3. A general-purpose jig for precision machining according to claim 1, characterized in that: The inner wall of the stepped annular groove (110) is in contact with the bottom of the face plate (210) and is provided with multiple sets of auxiliary rollers, which are arranged in a ring array.

4. A general-purpose fixture for precision machining according to claim 1, characterized in that: The top of the U-shaped seat (220) is provided with a second relief groove (221) corresponding to the first relief groove (211), and the size of the second relief groove (221) is equal to that of the first relief groove (211).

5. A general-purpose jig for precision machining according to claim 1, characterized in that: The U-shaped seat (220) has a pair of blind holes (222) on both sides. The U-shaped seat (220) is equipped with L-shaped side strips (270) on both sides. The side of the L-shaped side strips (270) is fixedly and slidably connected to the damping rods (271) in the blind holes (222).

6. A general-purpose jig for precision machining according to claim 1, characterized in that: The outer wall of the ear plate (280) is welded with a clamping plate (281), and the clamping plate (281) is fixed to the top of the L arm (241) by bolts. The top of the L arm (241) has multiple sets of bolt holes (242) at equal intervals.

7. A general-purpose jig for precision machining according to claim 1, characterized in that: A U-shaped baffle plate is fixed at the top of the platform (100) behind the clamping assembly (200).

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