Self-centering machining positioning device for disc parts

Abstract

The utility model discloses a disc part self-centering machining positioning device, which belongs to the technical field of machining, and comprises a positioning shaft, a plurality of spring pieces are uniformly and fixedly arranged on the right end surface of the positioning shaft along the circumference, the right end surface of the positioning shaft is in threaded connection with a compression bolt, and a conical compression block is sleeved on the compression bolt. When the disc part is fixed, the cylinder body of the disc part is firstly sleeved on the outer sides of the plurality of spring pieces, and then the compression bolt is rotated to move leftwards, so that the small end of the conical compression block enters among the plurality of spring pieces to force the plurality of spring pieces to be separated outwards; the outer end of each spring piece abuts against the inner side wall of the barrel of the disc part so as to fix the disc part, the disc part is positioned and fixed through an inner hole of the disc part, then the outer surface and the two end faces of the disc part are machined, machining can be completed through one-time fixing, the machining quality is high, and the machining efficiency is high. Efficiency and machining size are easy to guarantee, machining precision is high, and production efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and particularly relates to a self-centering machining positioning device for disc parts. Background Technique

[0002] In the field of machining, the conventional machining method for disc parts is to clamp the workpiece on the chuck of a horizontal lathe, and the center of the tailstock presses against the other side of the disc part to fix the disc part. The workpiece rotates, and the cutting tool is clamped on the tool rest to machine the workpiece. The advantage is that it directly uses the machine tool components for positioning and pressing, and the operation is relatively fast.

[0003] The disadvantages of the above scheme are that the two end faces of the workpiece need to be machined separately and need to be fixed on the lathe for machining twice; due to the two fixings during machining, there are differences in the positioning accuracy before and after machining, which is not suitable for machining products with high dimensional accuracy requirements, the machining dimensional stability is poor, the machining quality is low, and it has become a bottleneck problem during the machining of such disc parts. Content of the Utility Model

[0004] The purpose of the utility model is to provide a self-centering machining positioning device for disc parts, which has the advantages of high positioning and fixing stability and can complete machining with one fixing, and solves the problems of poor positioning accuracy of disc parts in the prior art, not being suitable for machining products with high dimensional accuracy requirements, poor machining dimensional stability, and low quality.

[0005] The utility model adopts the following technical scheme: a self-centering machining positioning device for disc parts, including a positioning shaft, a plurality of spring pieces are uniformly fixed on the right end face of the positioning shaft along the circumference, a pressing bolt is threadedly connected to the right end face of the positioning shaft, and a conical pressing block is sleeved on the pressing bolt.

[0006] Further, a pushing spring is arranged between the right end face of the positioning shaft and the conical pressing block.

[0007] Further, an arc block is arranged at the left end of each spring piece, and the outer surface of the arc block is higher than the outer surface of the spring piece in the natural state.

[0008] Further, a guide rod is fixedly arranged on the inner side wall of each arc block, the left side surface of the guide rod is slidably arranged along the radial direction with the right end face of the positioning shaft, a return spring is arranged along the radial direction on the right side of the guide rod, the outer end of the return spring is fixedly arranged with the inner side wall of the corresponding arc block, and the inner end of the return spring is fixedly arranged with the positioning shaft.

[0009] Further, a driving nut is threadedly connected to the outer surface of the positioning shaft on the left side of the arc block, a driving block is coaxially fixedly arranged on the right side surface of the driving nut, and the outer surface of the driving block is a conical surface.

[0010] Further, a chute corresponding to the guide rod is radially formed on the right end face of the positioning shaft. The positioning shaft is provided with sliders that can slide left and right through each chute. Each slider is slidably arranged along the radial direction with the corresponding guide rod, and the guide rod is slidably arranged along the radial direction with the positioning shaft through the slider.

[0011] Further, a driving device is arranged on the positioning shaft to the left of the chute. The output ends of the driving device are connected to each slider; the bottom end of the return spring is fixedly arranged on the inner bottom wall of the chute.

[0012] Further, a number of accommodating grooves corresponding to the chute are radially formed on the positioning shaft to the left of the chute. A threaded rod is fixedly arranged on the left side face of each slider. Each threaded rod passes through the positioning shaft and enters the corresponding accommodating groove.

[0013] Further, the positioning shaft is rotatably connected with gears through the left side walls of each accommodating groove. Each threaded rod passes through the corresponding gear and is threadedly connected with the gear. The driving device includes a gear ring rotatably connected with the positioning shaft, and the gear ring is meshed with each gear.

[0014] Further, a vertical plate is fixedly arranged at the left end of the positioning shaft, and a bottom plate is fixedly arranged on the lower end face of the vertical plate.

[0015] 1. By setting the positioning shaft, spring pieces and conical pressing blocks, when fixing the disc part, first, the cylinder body of the disc part is sleeved outside a number of spring pieces, and then the pressing bolt is threadedly connected with the right end face of the positioning shaft. Rotating the pressing bolt makes the pressing bolt move leftward, driving the conical pressing block to move leftward, so that the small end of the conical pressing block enters between multiple spring pieces, forcing the number of spring pieces to separate outward, and making the outer end of each spring piece abut against the inner side wall of the cylinder body of the disc part to fix the disc part. The disc part is positioned and fixed through the inner hole of the disc part, and then the outer surface and two end faces of the disc part are processed. The processing can be completed with one fixation, with high processing quality, easy guarantee of processing dimensions, high processing accuracy and high production efficiency.

[0016] 2. By the arc block and the driving nut, when processing the disc part, by rotating the driving nut to move rightward on the positioning shaft, the driving block fixed to the driving nut forces the arc block to move radially outward through the cooperation of the conical surface and the inner side wall of the arc block. When the arc block expands outward, it abuts against the inner side wall of the reduced-diameter joint, forming a support for the reduced-diameter joint of the disc part, achieving the purpose of fixing and supporting the reduced-diameter joint of the disc part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the present utility model;

[0018] Figure 2This is the front view structural schematic diagram of the present utility model;

[0019] Figure 3 This is the three-dimensional structural schematic diagram of the disc part in the present utility model;

[0020] Figure 4 This is the three-dimensional structural schematic diagram of the positioning shaft in the present utility model;

[0021] Figure 5 This is the front view structural schematic diagram of the positioning shaft in the present utility model;

[0022] Figure 6 This is the three-dimensional structural schematic diagram of the conical pressing block in the present utility model;

[0023] Figure 7 This is the three-dimensional structural schematic diagram of the arc block in the present utility model;

[0024] Figure 8 This is the three-dimensional structural schematic diagram of the return spring in the present utility model;

[0025] Figure 9 This is the three-dimensional structural schematic diagram of the slider in the present utility model;

[0026] Figure 10 This is in the present utility model Figure 9 The enlarged schematic diagram of the structure at position A in;

[0027] Figure 11 This is the three-dimensional structural schematic diagram of the guide rod in the present utility model.

[0028] In the figure, 1, cylinder body; 2, lip plate; 3, reduced-diameter joint; 4, positioning shaft; 5, spring piece; 6, pressing bolt; 7, conical pressing block; 8, pushing spring; 9, arc block; 10, guide rod; 11, return spring; 12, driving nut; 13, driving block; 14, sliding groove; 15, slider; 16, accommodating groove; 17, threaded rod; 18, gear; 19, gear ring; 20, vertical plate; 21, bottom plate. Specific embodiments

[0029] The following describes the present utility model in detail with reference to the drawings and embodiments:

[0030] Please refer to Figures 1-11 , the existing disc part includes a cylinder body 1, a lip plate 2 is coaxially and fixedly arranged on the outer surface of the cylinder body 1, and a reduced-diameter joint 3 is coaxially and fixedly arranged on the left side surface of the cylinder body 1.

[0031] The self-centering machining positioning device for disc parts of the present utility model includes a positioning shaft 4. A plurality of spring pieces 5 are uniformly and fixedly arranged along the circumference on the right end face of the positioning shaft 4. A pressing bolt 6 is threadedly connected to the right end face of the positioning shaft 4, and a conical pressing block 7 is sleeved on the pressing bolt 6. During use, the cylinder body 1 of the disc part is sleeved outside the plurality of spring pieces 5, and then by screwing the pressing bolt 6, the small end of the conical pressing block 7 enters between the plurality of spring pieces 5 to force the plurality of spring pieces 5 to separate outward, so that the outer end of each spring piece 5 abuts against the inner side wall of the cylinder body 1 of the disc part to fix the disc part. One-time fixation can achieve the machining of both end faces and the outer circle of the disc part, with high production efficiency.

[0032] In order to achieve the purpose of facilitating the removal of the disc part after machining, in this embodiment, a push spring 8 is arranged between the right end face of the positioning shaft 4 and the conical pressing block 7. During use, the pressing bolt 6 is inserted through the push spring 8 and threadedly connected to the right end face of the positioning shaft 4, and the conical pressing block 7 is used to force the plurality of spring pieces 5 to separate outward to fix the disc part. When the disc part is machined, turn the pressing bolt 6, so that the pressing bolt 6 moves to the right, and the conical pressing block 7 will automatically move to the right under the action of the push spring 8. The outer end of each spring piece 5 moves inward to reset, releasing the fixation of the cylinder body 1 of the disc part, and at this time, the disc part can be taken off.

[0033] In actual use, there is often a design similar to the reducing joint 3 on the cylinder body 1 of the disc part. When machining the cylinder body 1 of such a disc part, since the spring pieces 5 only fix the cylinder body 1 and there is no support inside the reducing joint 3, when machining the end face and outer surface of the reducing joint 3, the support of the reducing joint 3 is weak, affecting the machining quality and efficiency. To solve this problem, in this embodiment, an arc block 9 is arranged at the left end of each spring piece 5, and the outer surface of the arc block 9 is higher than the outer surface of the spring piece 5 in the natural state. During use, when the inner side wall of the cylinder body 1 of the disc part is supported and fixed by the outward expansion of each spring piece 5, the arc block 9 fixedly arranged with the spring piece 5 also expands outward to a certain extent, so that the outer surface of the arc block 9 contacts the inner side wall of the reducing joint 3, forming support and fixation for the inner side wall of the reducing joint 3, and improving the machining quality and efficiency of the end face and outer surface of the reducing joint 3.

[0034] The arc block 9 with fixed size has limitations in actual use and is only applicable to a limited range of drop between the reducer 3 and the inner wall of the cylinder 1. In order to increase the adaptability of the arc block 9, in this embodiment, a guide rod 10 is fixedly provided on the inner wall of each arc block 9, and the left side surface of the guide rod 10 is radially slidably arranged with the right end surface of the positioning shaft 4, and a return spring 11 is radially arranged on the right side of the guide rod 10, and the outer end of the return spring 11 is fixedly arranged with the corresponding inner wall of the arc block 9, and the inner end of the return spring 11 is fixedly arranged with the positioning shaft 4; the outer surface of the positioning shaft 4 located on the left side of the arc block 9 is threadedly connected to the drive nut 12, and the right side surface of the drive nut 12 is coaxially fixed with a drive block 13, and the outer surface of the drive block 13 is a conical surface; when in use, by rotating the drive nut 12 Move to the right on the positioning shaft 4, so that the driving block 13 cooperates with the inner wall of the arc block 9 through the tapered surface to force the arc block 9 to move radially outward, so that each arc block 9 can expand outwardly through the corresponding guide rod 10 and the positioning shaft 4 radially sliding. When the arc block 9 expands outward, it contacts the inner wall of the reducer 3 to form a support for the reducer 3; after the processing is completed, first rotate the driving nut 12 to make the driving nut 12 move to the left, so that the tapered surface of the driving block 13 is out of contact with the arc block 9, and the arc blocks 9 move inward under the action of the reset spring 11, and then rotate the clamping bolt 6 to make the clamping bolt 6 withdraw to the right, and the conical clamping block 7 automatically moves to the right under the action of the push-out spring 8, so that the outer end of each spring sheet 5 moves inward, and then the disc part can be removed.

[0035] In actual use, the length of the cylinder 1 is of various specifications, resulting in differences in the position of the reducer 3. In order for the arc block 9 to cooperate with the spring sheet 5 to better position and fix the disc part, in this embodiment, a slide groove 14 corresponding to the guide rod 10 is radially opened on the right end face of the positioning shaft 4, and the positioning shaft 4 is provided with a slider 15 for sliding left and right through each slide groove 14. Each slider 15 is radially slidable with the corresponding guide rod 10, and the guide rod 10 is radially slidable with the positioning shaft 4 through the slider 15; a driving device is also provided on the positioning shaft 4 on the left side of the slide groove 14, and the output end of the driving device is connected to each slider 15 The bottom end of the return spring 11 is fixedly arranged with the inner bottom wall of the slide groove 14; when in use, when the disc part is fixed, the cylinder 1 of the disc part is sleeved on the outer side of each spring sheet 5. At this time, if the position of the arc block 9 does not correspond to the reducer 3 of the disc part, each slider 15 can be driven by the driving device to move left and right in the slide groove 14, and then the slider 15 drives each arc block 9 to move left and right through the guide rod 10 to adjust the left and right position of the arc block 9 so that the arc block 9 corresponds to the position of the reducer 3. When the left and right position of the arc block 9 is adjusted, the position of the driving nut 12 is adaptively moved; then the pressure is rotated The tightening bolt 6 causes the clamping bolt 6 to move to the left, thereby driving the conical clamping block 7 to move to the left, so that the small end of the conical clamping block 7 enters between the plurality of spring sheets 5 and forces the outer end of each spring sheet 5 to expand outward through the conical surface to resist and fix the inner side wall of the cylinder 1 of the disc part, and then the driving device drives each arc block 9 to move to the left through the slider 15 and the guide rod 10, so that the inner side wall of each arc block 9 contacts the conical surface of the driving block 13, and continues to drive each arc block 9 to move to the left through the driving device. Since the driving nut 12 is stationary, each arc block 9 slides outward under the limit of the conical surface of the driving block 13, so that Each arc block 9 is fixed in contact with the inner wall of the reducer 3, thereby achieving the purpose of fixing the cylinder 1 and the reducer 3 of the disc part, and then the outer surface and two end faces of the disc part are processed; after the processing is completed, each arc block 9 is first driven to move to the right by the driving device, so that each arc block 9 moves inward under the action of the reset spring 11, so that the outer surface of the arc block 9 is out of contact with the inner wall of the reducer 3, and then the clamping bolt 6 is rotated to make the clamping bolt 6 withdraw to the right, and the conical clamping block 7 automatically moves to the right under the action of the push-out spring 8, so that the outer end of each spring sheet 5 moves inward, and then the disc part can be removed.

[0036] The method of driving the arc block 9 to move outward in the above scheme can also be achieved by rotating the drive nut 12 to drive the arc block 9 to move outward through the drive block 13, depending on the actual situation; when moving the arc block 9 left and right, the reset spring 11 will produce a tilted adaptation.

[0037] In this embodiment, a plurality of accommodating grooves 16 corresponding to the sliding groove 14 are radially formed on the left side of the positioning shaft 4 located in the sliding groove 14. A threaded rod 17 is fixedly arranged on the left side surface of each slider 15. Each threaded rod 17 passes through the positioning shaft 4 and enters the corresponding accommodating groove 16. The positioning shaft 4 is rotatably connected with a gear 18 through the left side wall of each accommodating groove 16. Each threaded rod 17 passes through the corresponding gear 18 and is in threaded connection with the gear 18. The driving device includes a gear ring 19 rotatably connected with the positioning shaft 4, and the gear ring 19 is meshed with each gear 18. When in use, by rotating the gear ring 19 to drive each gear 18 to rotate, the gear 18 drives each slider 15 to move left and right in the sliding groove 14 through the threaded rod 17, and then the slider 15 drives each arc-shaped block 9 to move left and right through the guide rod 10, so as to achieve the purpose of driving the arc-shaped block 9 to move left and right.

[0038] In this embodiment, a vertical plate 20 is fixedly arranged at the left end of the positioning shaft 4, and a bottom plate 21 is fixedly arranged on the lower end surface of the vertical plate 20.

[0039] The working principle of the utility model: When in use, the cylinder body 1 of the disc part is sleeved outside a plurality of spring pieces 5. By rotating the gear ring 19, each slider 15 is driven to move left and right in the sliding groove 14, and then the slider 15 drives each arc-shaped block 9 to move left and right through the guide rod 10 to adjust the left and right positions of the arc-shaped block 9 so that the position of the arc-shaped block 9 corresponds to that of the reduced-diameter joint 3. Then, by screwing the compression bolt 6, the small end of the conical compression block 7 enters between a plurality of spring pieces 5 to force the plurality of spring pieces 5 to separate outward, so that the outer end of each spring piece 5 abuts against the inner side wall of the cylinder body 1 of the disc part to fix the disc part. Then, by rotating the gear ring 19 to drive each gear 18 to rotate, the gear 18 drives the guide rod 10 to move left through the threaded rod 17 and the slider 15, and then the guide rod 10 drives the arc-shaped block 9 to move left, so that the inner side wall of each arc-shaped block 9 contacts the conical surface of the driving block 13. Continuing to rotate the gear ring 19 to drive each arc-shaped block 9 to move left, each arc-shaped block 9 slides outward under the limitation of the conical surface of the driving block 13, so that each arc-shaped block 9 abuts against and is fixed to the inner side wall of the reduced-diameter joint 3, and further the purpose of fixing both the cylinder body 1 of the disc part and the reduced-diameter joint 3 is achieved. Then, the outer surface and two end faces of the disc part are processed. After the processing is completed, first, by rotating the gear ring 19 to drive each arc-shaped block 9 to move right, each arc-shaped block 9 moves inward under the action of the return spring 11. Then, the compression bolt 6 is rotated so that the compression bolt 6 withdraws to the right. The conical compression block 7 automatically moves to the right under the action of the pushing spring 8, so that the outer end of each spring piece 5 moves inward, and then the disc part can be taken off.

Claims

1. A self-centering processing and positioning device for disc parts, characterized in that: The invention comprises a positioning shaft (4), a right end surface of which is evenly and fixedly provided with a plurality of spring sheets (5) along the circumference, a right end surface of which is threadedly connected with a clamping bolt (6), and a conical clamping block (7) is sleeved on the clamping bolt (6).

2. The self-centering processing and positioning device for disc parts according to claim 1 is characterized in that: A push-out spring (8) is provided between the right end surface of the positioning shaft (4) and the conical pressing block (7).

3. The self-centering processing and positioning device for disc parts according to claim 2 is characterized in that: An arc block (9) is provided at the left end of each spring sheet (5), and the outer surface of the arc block (9) is higher than the outer surface of the spring sheet (5) when it is in a natural state.

4. The self-centering processing and positioning device for disc parts according to claim 3 is characterized in that: A guide rod (10) is fixedly arranged on the inner side wall of each arc block (9), and the left side surface of the guide rod (10) is radially slidably arranged with the right end surface of the positioning shaft (4). A return spring (11) is radially arranged on the right side of the guide rod (10), and the outer end of the return spring (11) is fixedly arranged with the inner side wall of the corresponding arc block (9), and the inner end of the return spring (11) is fixedly arranged with the positioning shaft (4).

5. The self-centering processing and positioning device for disc parts according to claim 4 is characterized in that: The outer surface of the positioning shaft (4) located on the left side of the arc block (9) is threadedly connected to a driving nut (12), and a driving block (13) is coaxially fixedly arranged on the right side of the driving nut (12), and the outer surface of the driving block (13) is a conical surface.

6. The self-centering processing and positioning device for disc parts according to claim 5 is characterized in that: The right end surface of the positioning shaft (4) is radially provided with a slide groove (14) corresponding to the guide rod (10); the positioning shaft (4) is provided with a slider (15) for sliding left and right through each slide groove (14); each slider (15) is radially slidable with the corresponding guide rod (10); the guide rod (10) is radially slidable with the positioning shaft (4) through the slider (15).

7. The self-centering processing and positioning device for disc parts according to claim 6 is characterized in that: A driving device is arranged on the positioning shaft (4) located on the left side of the slide groove (14), and the output end of the driving device is connected to each slider (15); the bottom end of the return spring (11) is fixedly arranged on the inner bottom wall of the slide groove (14).

8. The self-centering processing and positioning device for disc parts according to claim 7 is characterized in that: A plurality of receiving grooves (16) corresponding to the slide groove (14) are radially provided on the positioning shaft (4) on the left side of the slide groove (14), and a threaded rod (17) is fixedly provided on the left side surface of each slider (15), and each threaded rod (17) passes through the positioning shaft (4) and enters the corresponding receiving groove (16).

9. The self-centering processing and positioning device for disc parts according to claim 8, characterized in that: The positioning shaft (4) is rotatably connected to a gear (18) through the left side wall of each accommodating groove (16), each threaded rod (17) passes through a corresponding gear (18) and is threadedly connected to the gear (18), and the driving device includes a ring gear (19) rotatably connected to the positioning shaft (4), and the ring gear (19) is meshed with each gear (18).

10. The self-centering processing and positioning device for disc parts according to claim 1, characterized in that: A vertical plate (20) is fixedly disposed on the left end of the positioning shaft (4), and a bottom plate (21) is fixedly disposed on the lower end surface of the vertical plate (20).

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