High-precision positioning mold processing fixture

Abstract

The application belongs to the technical field of clamps, and particularly relates to a mold machining clamp with high-precision positioning, which comprises a fixed disc, a plurality of tracks penetrating through the outer wall of the fixed disc, a clamping mechanism installed on the fixed disc, a supporting block installed above the clamping mechanism, and a rotating disc installed above the supporting block. When regular or special-shaped workpieces are clamped, the rotating screw pushes the connecting block to move along the tracks through the rotating shaft at the bottom, and cooperates with the movable block below, so that the clamping block rotates along the sliding groove according to the shape of the special-shaped workpiece. The steel column is used to fix the workpiece and better match the special-shaped workpiece, improve the accuracy of the fixed workpiece, and effectively avoid the production error of the mold caused by the shaking of the workpiece during the machining process. When relatively thin regular workpieces are machined, the rotating screw moves the movable block upward along the sliding rail through the sliding block, and the flat outer wall of the connecting block clamps the workpiece, so that the clamp does not need to be frequently replaced, the work process is simplified, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of fixture technology and relates to a high-precision positioning mold processing fixture. Background Technology

[0002] A fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for machining or inspection. It is also called a clamp. Broadly speaking, any device used to quickly, conveniently, and safely mount a workpiece at any stage of the manufacturing process can be called a fixture. When machining a workpiece on a machine tool, to ensure that the workpiece surface meets the technical requirements specified in the drawing, such as dimensions, geometry, and positional accuracy relative to other surfaces, the workpiece must be properly mounted and clamped before machining. A fixture typically consists of positioning elements, clamping devices, tool-setting guide elements, connecting elements, and a fixture body.

[0003] Existing fixtures are mainly used in the mold processing industry. Ordinary fixtures can only clamp materials with regular shapes and cannot accurately fix irregular workpieces. When the fixing accuracy does not meet the standard, the workpiece will shake during processing, resulting in errors in the produced mold and making it unusable. Different types of fixtures need to be changed when encountering different types of workpieces. The process of changing fixtures is time-consuming and laborious, which greatly reduces work efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a high-precision positioning mold processing fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A high-precision positioning mold processing fixture includes a fixed plate with several tracks penetrating its outer wall. A clamping mechanism is mounted on the fixed plate, a support block is mounted above the clamping mechanism, a turntable is mounted above the support block, a lead screw is mounted at the bottom of the turntable, a connecting block is mounted below the support block, a rotating shaft is mounted on the bottom outer wall of the connecting block, a rectangular groove is formed on one side of the connecting block, slide rails are provided on both sides of the rectangular groove, a movable block is mounted on one side of the connecting block, an arc-shaped groove penetrating its outer wall is formed on one side of the movable block, a slider is mounted on the other side of the movable block, and connecting blocks are installed between adjacent sliders. A sliding groove is formed on the inner wall of the arc-shaped groove, a clamping block is movably mounted inside the arc-shaped groove, a cylindrical groove is formed in the clamping block, a spring and a steel column are installed in the cylindrical groove, a receiver is movably mounted at the location of the support block, a slide rod is installed in the receiver, and a square block is mounted on the top of the slide rod.

[0007] In the aforementioned high-precision positioning mold processing fixture, the track is symmetrically arranged on both sides of the fixed plate, and the two ends of the support block are provided with threaded holes that penetrate the outer wall. Nuts are installed at both ends of the threaded holes, and bolts are engaged in the threaded holes.

[0008] In the aforementioned high-precision positioning mold processing fixture, one end of the lead screw passes through the support block, and a thread is provided on the inner wall of the support block at the point of penetration. The lead screw and the thread at this point mesh with each other, and the other end of the lead screw is rotatably installed with the connecting block.

[0009] In the aforementioned high-precision positioning mold processing fixture, the rotating shaft is inserted into the track, and the track and the rotating shaft are rotatably connected. The rectangular groove is located in the middle of the connecting block, and the connecting block is located in the middle of the movable block. The connecting block is inserted into the rectangular groove, and a lead screw is engaged in the connecting block. The bottom of the lead screw is rotatably installed with the rectangular groove.

[0010] In the aforementioned high-precision positioning mold processing fixture, the slider is slidably installed in the slide rail, and the movable block is slidably installed through the slider and the connecting block. The height of the movable block is less than that of the connecting block.

[0011] In the aforementioned high-precision positioning mold processing fixture, a slider is installed inside the clamping block. The clamping block is slidably installed between the slider and the groove. The cylindrical groove and the steel column are slidably installed. At the same time, one end of the spring is connected to the cylindrical groove and the other end is connected to the steel column. Meanwhile, there is a gap between the steel column at the edge and the inner wall of the arc groove. Limiting blocks are provided at the edge of the cylindrical groove and the end of the steel column.

[0012] In the aforementioned high-precision positioning mold processing fixture, a connecting block and a movable block that are slidably installed below the fixed plate are provided. The connecting block has threaded holes and nut structures at both ends. The threaded holes are used to fix the connecting block to the track by engaging the mounting bolts.

[0013] In the aforementioned high-precision positioning mold processing fixture, the fixed plate has several through holes penetrating the outer wall at the location of the clamping mechanism. These through holes are arranged irregularly, and a cavity is provided at the bottom of the through holes. The receiver is used in conjunction with the through holes.

[0014] In the aforementioned high-precision positioning mold processing fixture, the receiver has a hollow section in the middle, the slide rod is movably installed in the hollow section, and a spring is installed on the outside of the slide rod. One end of the spring and the other end of the slide rod are connected to the receiver. A slot is provided at the bottom of the slide rod, and a ring is installed on the outside of the receiver.

[0015] In the aforementioned high-precision positioning mold processing fixture, the bottom of the receiver is provided with a trapezoidal groove that penetrates the outer wall, and a steel ball is movably installed inside the trapezoidal groove, the size of which is larger than the trapezoidal groove.

[0016] Compared with existing technologies, the advantages of this invention are:

[0017] This invention, based on the workpiece size, uses bolts to fix the corresponding support blocks and the lower connecting blocks. When clamping regular or irregular workpieces, rotating the lead screw pushes the connecting block along the track via the bottom rotating shaft to the corresponding side. This, in conjunction with the lower movable block, causes the clamping block to rotate along the slide groove according to the shape of the irregular workpiece. The steel column secures the workpiece and better fits it, improving the accuracy of workpiece fixation and effectively preventing workpiece shaking during processing, which could lead to errors in the production mold. For relatively thin, regular workpieces, rotating the lead screw allows the movable block to move upwards along the slide rail via a slider. The flat outer wall of the connecting block clamps the workpiece, eliminating the need for frequent fixture changes, simplifying the workflow, and improving work efficiency.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the clamping mechanism in this invention.

[0021] Figure 3 This is a schematic diagram of the connecting block and the movable block in this invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the clamping block in this invention.

[0023] Figure 5 This is a side view of the connecting block in this invention.

[0024] Figure 6 yes Figure 1 Enlarged diagram of point A in the middle.

[0025] Figure 7 This is a schematic diagram of the structure of the receiver in this invention.

[0026] In the diagram: 1. Fixed plate; 2. Track; 3. Clamping mechanism; 31. Support block; 32. Threaded hole; 33. Nut; 4. Turntable; 41. Lead screw; 5. Connecting block; 51. Rotating shaft; 52. Rectangular groove; 53. Slide rail; 6. Movable block; 60. Arc groove; 61. Slider; 62. Connecting block; 63. Slide groove; 7. Clamping block; 71. Cylindrical groove; 72. Spring; 73. Steel column; 8. Receiver; 81. Slide rod; 82. Square block; 83. Slot; 84. Ring; 9. Trapezoidal groove; 91. Steel ball. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-7 As shown, a high-precision positioning mold processing fixture includes a fixed plate 1, on which several tracks 2 penetrate the outer wall are provided. A clamping mechanism 3 is installed on the fixed plate 1. A support block 31 is installed above the clamping mechanism 3. A turntable 4 is installed above the support block 31. A lead screw 41 is installed at the bottom of the turntable 4. A connecting block 5 is installed below the support block 31. A rotating shaft 51 is installed on the bottom outer wall of the connecting block 5. A rectangular groove 52 is formed on one side of the connecting block 5. Slide rails 53 are provided on both sides of the rectangular groove 52. A movable block 6 is installed on one side. An arc-shaped groove 60 penetrating the outer wall is opened on one side of the movable block 6. A slider 61 is installed on the other side of the movable block 6. A connecting block 62 is installed between adjacent sliders 61. A sliding groove 63 is opened on the inner wall of the arc-shaped groove 60. A clamping block 7 is movably installed inside the arc-shaped groove 60. A cylindrical groove 71 is opened in the clamping block 7. A spring 72 and a steel column 73 are installed in the cylindrical groove 71. A receiver 8 is movably installed at the location of the support block 31. A sliding rod 81 is installed in the receiver 8. A square block 82 is installed on the top of the sliding rod 81.

[0029] Combination Figure 1 , Figure 2 As shown, the track 2 is symmetrically arranged on both sides of the fixed disk 1. The two ends of the support block 31 are provided with threaded holes 32 that penetrate the outer wall. Nuts 33 are installed at both ends of the threaded holes 32, and bolts are engaged in the threaded holes 32.

[0030] Furthermore, since the track 2 penetrates the outer wall of the fixed plate 1, by opening threaded holes 32 in the support block 31, the support block 31 is fixed to the fixed plate 1 on one side of the track 2 and the support block 31 using nuts 33 and bolts. Clamping tools of different sizes can be installed on the corresponding positions of the track 2 in this way.

[0031] Combination Figure 1 , Figure 2As shown, one end of the lead screw 41 passes through the support block 31, and a thread is provided on the inner wall of the support block 31 at the point of penetration. The lead screw 41 and the thread at this point mesh with each other, and the other end of the lead screw 41 is rotatably installed with the connecting block 5.

[0032] Furthermore, while the lead screw 41 and the thread at the through-hole are engaged with each other, its bottom is rotatably connected to the connecting block 5. When the lead screw 41 is rotated by the turntable 4, the lead screw 41 engages with the thread and moves to one side, allowing the connecting block 5 to move along the direction of the track 2 via the rotating shaft 51, pulling closer to the other side movable block 6, thereby realizing the clamping of the workpiece.

[0033] Combination Figure 1 , Figure 2 As shown, the rotating shaft 51 is inserted into the track 2, and the track 2 and the rotating shaft 51 are rotatably connected. The rectangular groove 52 is located in the middle of the connecting block 5, and the connecting block 62 is located in the middle of the movable block 6. The connecting block 62 is inserted into the rectangular groove 52, and a lead screw 41 is engaged in the connecting block 62. The bottom of the lead screw 41 is rotatably installed in the rectangular groove 52. The slider 61 is slidably installed in the slide rail 53, and the movable block 6 is slidably installed through the slider 61 and the connecting block 5. The height of the movable block 6 is less than that of the connecting block 5.

[0034] Furthermore, for some thinner workpieces, when normally clamped by the fixture, only part of the workpiece body may be in contact with the steel column 73, which may result in unstable clamping. In this case, the lead screw 41 can be rotated, and the lead screw 41 meshes with the connecting block 62. The lead screw 41 is also rotatably connected to the rectangular groove 52. Therefore, when the lead screw 41 is rotated, the movable block 6 copper drum slider 61 moves upward along the slide rail 53, exposing the lower part of the connecting block 5, and the workpiece is directly fixed through the connecting block 5.

[0035] Combination Figure 1 , Figure 2 As shown, a slider 61 is installed inside the clamping block 7. The clamping block 7 is slidably installed between the slider 61 and the groove 63. The cylindrical groove 71 and the steel column 73 are slidably installed. At the same time, one end of the spring 72 is connected to the cylindrical groove 71 and the other end is connected to the steel column 73. There is a gap between the steel column 73 at the edge and the inner wall of the arc groove 60. Limiting blocks are provided at the edge of the cylindrical groove 71 and the end of the steel column 73.

[0036] Furthermore, when clamping irregularly shaped workpieces, the clamping block 7 will rotate accordingly in the arc groove 60 along the slide groove 63 via the slider 61 according to the outer contour of the irregularly shaped workpiece. At the same time as the clamping block 7 rotates, the internal spring 72 deforms and compresses, and the steel column 73 moves along the cylindrical groove 71, so that the top of the steel column 73 fits better against the outer wall of the irregularly shaped workpiece. The limiting blocks installed at the edge of the cylindrical groove 71 and the end of the steel column 73 can prevent the steel column 73 from falling out of the cylindrical groove 71.

[0037] Combination Figure 1 , Figure 3 As shown, a connecting block 5 and a movable block 6 are installed below the fixed plate 1 via a slide rail 53 and a slider 61. The connecting block 5 has threaded holes 32 and nuts 33 at both ends. The threaded holes 32 are used to fix the connecting block 5 to the track 2 by engaging the mounting bolts.

[0038] Furthermore, the fixed plate 1 is equipped with the same connecting block 5 and movable block 6 as the clamping mechanism 3, which can work together with the clamping mechanism 3 to clamp the workpiece.

[0039] Combination Figure 1 , Figure 6 As shown, the fixed disk 1 has several through holes penetrating the outer wall at the location of the clamping mechanism 3. The through holes are arranged irregularly, and a cavity is provided at the bottom of the through holes. The receiver 8 is used in conjunction with the through holes.

[0040] Furthermore, during the processing of the workpiece, the connecting block 5 and the movable block 6 may wobble, resulting in unstable clamping. At the same time, the through holes are arranged irregularly, which can prevent the receiver 8 from being unable to be inserted into the through hole near the support block 31 when in use. By using the receiver 8 to hold the support block 31 against it, it plays an auxiliary role in preventing it from moving backward. The cavity is located at the bottom of the through hole, and the inner diameter of the cavity is larger than that of the through hole. This cavity is used in conjunction with the steel ball 91 in the receiver 8.

[0041] Combination Figure 1 , Figure 7 As shown, the receiver 8 has a hollow section in the middle, and the sliding rod 81 is movably installed in the hollow section. A spring 72 is installed on the outside of the sliding rod 81, with one end of the spring 72 connected to the other end of the sliding rod 81 and the receiver 8. A slot 83 is provided at the bottom of the sliding rod 81, and a ring 84 is installed on the outside of the receiver 8. A trapezoidal groove 9 penetrating the outer wall is provided at the bottom of the receiver 8, and a steel ball 91 is movably installed inside the trapezoidal groove 9. The size of the steel ball 91 is larger than the trapezoidal groove 9.

[0042] Furthermore, the trapezoidal groove 9 is designed horizontally, and the diameter of the steel ball 91 is larger than the opening size of the trapezoidal groove 9 facing outward. The steel ball 91 can move in the trapezoidal groove 9 but will not fall out to the outside. When the receiver 8 is inserted into the through hole, the ring 84 is stuck outside the through hole, and together with the steel ball 91 inside, they form an interaction force to fix the receiver 8 here.

[0043] The working principle of this invention is:

[0044] When performing workpiece clamping, the size of the workpiece to be fixed is visually estimated based on daily processing experience. The support block 31, the connecting block 5 and the movable block 6 in the clamping mechanism 3 are fixed on the track 2 of the fixed plate 1 by turning the nut 33.

[0045] The workpiece is placed in the middle of the fixed plate 1. The turntable 4 is rotated to drive the lead screw 41 to rotate. Since the lead screw 41 passes through the support block 31 and meshes with the thread at the through point, and the lead screw 41 and the connecting block 5 are rotatably connected, the lead screw 41 moves along the through point while rotating, and pushes the connecting block 5 to move along the direction of the track 2 through the bottom rotating shaft 51, thereby pulling closer the distance with the lower connecting block 5 and the movable block 6, thereby using the steel column 73 to fix the workpiece in the middle.

[0046] When the steel column 73 contacts the workpiece, if the workpiece is regular in shape, the steel column 73 will directly adhere to the workpiece, and the internal spring 72 will deform and compress. As the lead screw 41 advances, the workpiece will be firmly fixed. If the workpiece is irregularly shaped, since the outer wall of the irregularly shaped workpiece is of different shapes, when the steel column 73 contacts the irregularly shaped workpiece, the clamping block 7 will rotate to different degrees in the arc groove 60 along the slide groove 63 according to the shape of the workpiece. The internal spring 72 will deform and compress to different degrees, and each steel column 73 will also retract into the cylindrical groove 71 to different degrees, so that the exposed steel column 73 will tightly adhere to the outer wall of the irregularly shaped workpiece, thus achieving the purpose of clamping the irregularly shaped workpiece.

[0047] When the processed workpiece is thin, only a part of the outer wall is in contact with the steel column 73. At this time, the fixation by the fixture is not stable enough. Therefore, it is necessary to rotate the lead screw 41 at the connection between the connecting block 5 and the movable block 6. Since the connecting block 62 and the lead screw 41 mesh with each other, and the lead screw 41 is rotatably connected to the rectangular groove 52, the movable block 6 can move upward along the slide rail 53 through the slider 61, exposing the connecting block 5 located below the movable block 6, and using the flat outer wall of the connecting block 5 to fix the workpiece.

[0048] When fixing the workpiece, if the through hole on the rear side of the support block 31 meets the conditions for using the receiver 8, two fingers can be used to hold the receiver 8 in reverse while the thumb presses the square block 82 in the middle. The slide rod 81 moves downward and the spring 72 deforms and compresses. The slot 83 moves to the same horizontal line as the trapezoidal groove 9, and the internal steel ball 91 is in an active state. The receiver 8 can be inserted into the through hole, and the ring 84 falls at the edge of the through hole. Stop pressing the square block 82, and the spring 72 pushes the slide rod 81 upward, allowing the slot 83 to move to the initial position, which is above the trapezoidal groove 9. The outer wall of the slide rod 81 presses against the steel ball 91 on the outside, allowing part of its body to protrude from the trapezoidal groove 9. Together with the ring 84, they form an interaction force to fix the receiver 8 on the through hole, press against the support block 31 to prevent it from moving backward, and play an auxiliary positioning role.

[0049] The specific embodiments described herein are merely illustrative examples of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention.

[0050] Although this document frequently uses terms such as 1. fixed plate; 2. track; 3. clamping mechanism; 31. support block; 32. threaded hole; 33. nut; 4. turntable; 41. lead screw; 5. connecting block; 51. rotating shaft; 52. rectangular groove; 53. slide rail; 6. movable block; 60. arc groove; 61. slider; 62. connecting block; 63. sliding groove; 7. clamping block; 71. cylindrical groove; 72. spring; 73. steel column; 8. receiver; 81. slide rod; 82. square block; 83. slot; 84. ring; 9. trapezoidal groove; 91. steel ball, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention, and interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A high-precision positioning mold processing fixture, comprising a fixed plate (1), characterized in that, The fixed disk (1) is provided with several tracks (2) that penetrate the outer wall. A support block (31) is installed above the fixed disk (1). The support block (31) is threadedly connected to the lead screw through a threaded hole. A turntable (4) is installed at the upper end of the lead screw. The lower end of the lead screw passes through the support block (31) and the connecting block (1) and is rotatably installed. A rotating shaft (51) is installed on the bottom outer wall of the connecting block (1). A rectangular groove (52) and two slide rails (53) are opened at the lower end of the connecting block (1). The two slide rails (53) are located on both sides of the rectangular groove (52). A movable block (1) is installed at the lower end of the connecting block (1). A track that penetrates the outer wall is opened at the lower end of the movable block (1). The arc-shaped groove (60) of the wall has two sliders and a connecting block (62) installed at the upper end of the movable block. The two sliders are located on both sides of the connecting block (62). A sliding groove (63) is provided on the inner wall of the arc-shaped groove (60). A clamping block is movably installed inside the arc-shaped groove (60). A cylindrical groove (71) is provided in the clamping block. A spring and a steel column (73) are installed in the cylindrical groove (71). A receiver (8) is movably installed on the fixed plate (1) at the location of the support block (31). A sliding rod (81) is installed in the receiver (8). A square block (82) is installed on the top of the sliding rod (81). The track (2) is symmetrically arranged on both sides of the fixed plate (1). The two ends of the support block (31) are provided with threaded holes (32) that penetrate the outer wall. Nuts (33) are installed at both ends of the threaded holes (32), and bolts are engaged in the threaded holes (32). The rotating shaft (51) is inserted into the track (2), and the track (2) and the rotating shaft (51) are slidably connected. The rectangular groove (52) is located in the middle of the connecting block one. The connecting block (62) is located in the middle of the movable block one. The connecting block (62) is inserted into the rectangular groove (52), and a lead screw two is engaged in the connecting block (62). The end of the lead screw two and the rectangular groove (52) are rotatably installed. The slider is slidably installed in the slide rail (53). The movable block one is slidably installed through the slider and the connecting block one. The height of the movable block one is less than that of the connecting block one. The clamping block is equipped with a slider inside. The clamping block is slidably installed between the slider and the groove (63). The cylindrical groove (71) and the steel column (73) are slidably installed together. At the same time, one end of the spring is connected to the cylindrical groove (71) and the other end of the spring is connected to the steel column (73). At the same time, there is a gap between the steel column (73) at the edge and the inner wall of the arc groove (60). Limiting blocks are provided at the edge of the cylindrical groove (71) and the end of the steel column (73). A connecting block 2 is installed below the fixed plate (1). A movable block 2 is installed above the connecting block 2 via a slide rail and a slider. A clamping block is installed above the movable block 2. Threaded holes (32) and nut (33) structures are provided at both ends of the connecting block 2. The threaded holes (32) are used to fix the connecting block 2 to the track (2) by engaging the mounting bolts.

2. The high-precision positioning mold processing fixture according to claim 1, characterized in that, The fixed plate (1) has several through holes penetrating the outer wall at the location of the support block (31). The through holes are arranged irregularly, and a cavity is provided at the bottom of the through holes. The receiver (8) is used in conjunction with the through holes.

3. The high-precision positioning mold processing fixture according to claim 2, characterized in that, The receiver (8) has a mounting hole in the middle, the slide rod (81) is movably mounted in the mounting hole, and a second spring is mounted on the outside of the slide rod (81). One end of the second spring is connected to the slide rod (81), and the other end of the second spring is connected to the receiver (8). A slot (83) is provided at the bottom of the slide rod (81), and a ring (84) is mounted on the outside of the receiver (8).

4. The high-precision positioning mold processing fixture according to claim 3, characterized in that, The bottom of the receiver (8) is provided with a trapezoidal groove (9) that penetrates the outer wall. A steel ball (91) is movably installed inside the trapezoidal groove (9). The size of the steel ball (91) is larger than that of the trapezoidal groove (9).

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