Coarse positioning self-centering clamping mechanism
By designing a coarse positioning self-centering clamping mechanism, using components such as self-centering pads, support rods, and guide blocks to achieve accurate positioning and automatic clamping of parts, solving the problem that the hole positioning accuracy in part processing is affected by human factors, and improving the accuracy and efficiency of mass production.
Patent Information
- Application Number
- CN202422204838.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-09
AI Technical Summary
During the processing of parts, the accuracy of hole positioning is greatly affected by human factors, resulting in low appearance repetition during batch processing.
A coarse positioning self-centering clamping mechanism is designed, including an end surface positioning part, a guide positioning part of the hole and a self-centering clamping part of the hole. The precise positioning and automatic clamping of parts can be achieved through components such as self-centering pads, support rods, guide blocks, guide pads, piston rods, self-centering shafts, oblique wedge slide rods and self-centering heads.
It realizes accurate and rapid positioning of parts and realizes automatic clamping, solving the problem of low appearance repetition during batch processing, and improving the rapid, precise coarse positioning and automatic clamping processing capabilities of mass production.
Smart Images
Figure CN223029528U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of part processing, and particularly relates to a rough positioning self-centering clamping mechanism. Background Technique
[0002] The first process of part processing is to position the rough surface and machine the precise positioning reference.
[0003] However, hole positioning generally uses shaft positioning. To facilitate insertion, the clearance fit is relatively large. Therefore, the positioning accuracy of the part is greatly affected by human factors, resulting in large fluctuations in positioning accuracy and low appearance repeatability during batch processing. Therefore, it is necessary to design a rough positioning self-centering clamping mechanism to solve the above problems. Summary of the Invention
[0004] In view of the above problems, the utility model provides a rough positioning self-centering clamping mechanism to solve the problems put forward in the above background technique.
[0005] To achieve the above object, the utility model provides the following technical solution: A rough positioning self-centering clamping mechanism, including an end face positioning part, a hole guiding and positioning part, and a hole self-centering clamping part. The end face positioning part includes a self-centering pad and a support rod. A self-centering seat is installed on the self-centering pad and connected by three first inner hexagon bolts.
[0006] There are two groups of the hole guiding and positioning parts. The two hole guiding and positioning parts are arranged at the upper and lower ends outside the self-centering seat. Each hole guiding and positioning part includes a guiding block and a guiding gasket. One guiding block and two guiding gaskets form a group and are installed on the self-centering seat by second inner hexagon bolts.
[0007] There are two upper and lower groups of the hole self-centering clamping parts, which are arranged at the upper and lower ends inside the self-centering seat.
[0008] Further, the hole self-centering clamping part includes a piston rod, a self-centering shaft, an inclined wedge slide rod, and a self-centering pressure head. The screw part of the piston rod is equipped with a self-centering shaft and connected by an M12 thin nut. Three inclined wedge slide rods are installed on the self-centering shaft. Adjusting washers and self-centering pressure heads are installed on the inclined wedge slide rods through threads. The self-centering pressure head is used to clamp the part to be machined.
[0009] Further, an STD Grease Seal is installed on the piston rod, and a threaded bushing is installed on the piston rod. The threaded bushing is threadedly connected and fastened with the internal thread of the self-centering seat to form upper and lower internal oil cavities.
[0010] Further, a first O-ring is installed on the outer surface of the threaded bushing, and a second O-ring and an O-ring retaining ring are installed on the inner surface of the threaded bushing.
[0011] Further, the top end of the self-centering seat is equipped with an end cover through three third hexagon socket head cap screws.
[0012] Further, three 1 / 8 threaded plugs are installed in the process oil holes on the outer surface of the self-centering seat, and a third O-ring is installed in the oil passage between the self-centering seat and the self-centering spacer block.
[0013] The technical effects and advantages of the present utility model:
[0014] Precise and rapid positioning can be achieved, and automatic clamping can be realized, solving the problem of low repeatability of appearance during batch processing. At the same time, rapid, precise rough positioning and automatic clamping processing for batch production are realized. Therefore, it can be extended to the fixture design of parts with larger hole diameters, avoiding the phenomenon of large batch appearance differences during processing.
[0015] Other features and advantages of the present utility model will be described in the following specification, and part of them will become obvious from the specification or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification and drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 Shows a structural schematic diagram of the rough positioning self-centering clamping mechanism according to an embodiment of the present utility model;
[0018] Figure 2 Shows a structural schematic diagram of the rough positioning self-centering clamping mechanism from another perspective according to an embodiment of the present utility model;
[0019] Figure 3 Shows Figure 2 A cross-sectional view taken along the A-A direction in
[0020] Figure 4 Shows Figure 2 A cross-sectional view taken along the B-B direction in
[0021] Reference numerals: 1, self-centering pad; 2, support rod; 3, self-centering seat; 4, guide block; 5, wedge slide bar; 6, self-centering shaft; 7, end cover; 8, self-centering press head; 9, adjusting washer; 10, piston rod; 11, guide gasket; 12, threaded bushing; 13, M12 thin nut; 14, first O-ring; 15, STD Gleitring; 16, second O-ring; 17, O-ring retaining ring; 18, 1 / 8 threaded plug; 19, third hexagon socket head cap screw; 20, second hexagon socket head cap screw; 21, third O-ring; 22, oil port A; 23, oil port B. Detailed implementation manners
[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] As Figures 1 to 3 shown, a rough positioning and self-centering clamping mechanism of an embodiment of the present utility model includes an end face positioning part, a hole guiding and positioning part, and a hole self-centering clamping part. The end face positioning part includes a self-centering pad 1 and a support rod 2. A self-centering seat 3 is installed on the self-centering pad 1 and is connected by three first hexagon socket head cap screws.
[0024] There are two groups of the hole guiding and positioning parts. The two hole guiding and positioning parts are arranged at the upper and lower ends outside the self-centering seat 3. Each hole guiding and positioning part includes a guide block 4 and a guide gasket 11. One guide block 4 and one guide gasket 11 form a group and are installed on the self-centering seat 3 by a second hexagon socket head cap screw 20.
[0025] There are two upper and lower groups of the hole self-centering clamping parts. The two groups of hole self-centering clamping parts are arranged at the upper and lower ends inside the self-centering seat 3.
[0026] In this embodiment, when a part to be machined is loaded, the upper and lower ends of the inner hole of the part to be machined are roughly positioned by guiding through the guide block 4, and the end face of the part to be machined is positioned by the support rod 2. And the upper and lower ends of the part to be machined are automatically clamped by the hole self-centering clamping part. Thus, accurate and rapid positioning can be achieved, and automatic clamping can be realized, solving the problem of low repeatability of appearance during batch machining. At the same time, rapid and accurate rough positioning and automatic clamping during batch production are realized. Therefore, it can be extended to the fixture design of parts with larger hole diameters to avoid large differences in batch appearance during machining.
[0027] Optionally, as Figure 3 shown, the self-centering clamping part of the hole includes a piston rod 10, a self-centering shaft 6, an inclined wedge slide bar 5, and a self-centering press head 8. The screw part of the piston rod 10 is equipped with the self-centering shaft 6 and is connected by an M12 thin nut 13. Three of the inclined wedge slide bars 5 are installed on the self-centering shaft 6. Adjusting washers 9 and the self-centering press head 8 are installed on the inclined wedge slide bars 5 through threads, and the self-centering press head 8 is used to clamp the part to be machined.
[0028] Specifically, as Figure 4 shown, an intermediate internal oil passage and upper and lower end internal oil passages are provided in the self-centering seat 3. An oil port A22 and an oil port B23 are provided at the end of the self-centering seat 3. The oil port A22 is communicated with the intermediate internal oil passage, and the oil port B23 is communicated with the upper and lower end internal oil passages.
[0029] In this embodiment, the hydraulic oil enters the intermediate internal oil passage of the self-centering seat 3 through the oil port A22, pushes the upper and lower two piston rods 10 to drive the two self-centering shafts 6 to move towards both ends, and pushes the three inclined wedge slide bars 5 at the upper and lower parts to open outwards. The self-centering press head 8 installed on the inclined wedge slide bars 5 clamps the part to be machined. The hydraulic oil enters the upper and lower end internal oil passages of the self-centering seat 3 through the oil port B23, pushes the upper and lower two piston rods 10 to drive the two self-centering shafts 6 to move towards the middle, and pushes the three inclined wedge slide bars 5 at the upper and lower parts to contract inwards. The self-centering press head 8 installed on the inclined wedge slide bars 5 releases the part to be machined. Thus, the function effect of automatically clamping the part to be machined by the self-centering clamping part of the hole is ensured.
[0030] Optionally, as Figure 3 shown, an STD Gleason ring 15 is installed on the piston rod 10, and a threaded bushing 12 is installed on the piston rod 10. The threaded bushing 12 is fastened to the internal thread of the self-centering seat 3 through threads to form an internal upper and lower oil chamber.
[0031] Specifically, for the upper part of the automatic centering seat, the intermediate internal oil passage can be communicated with the lower oil chamber, and the upper and lower end oil passages can be communicated with the upper oil chamber. For the lower part of the automatic centering seat, the intermediate internal oil passage can be communicated with the upper oil chamber, and the upper and lower end oil passages can be communicated with the lower oil chamber.
[0032] In this embodiment, by providing an STD Gleason ring 15 on the piston rod 10 for sealing, the upper and lower oil chambers separated by the threaded bushing 12 inside the self-centering seat 3 can be isolated, so that the hydraulic oil can be introduced into different oil chambers to drive the three inclined wedge slide bars 5 to contract or open.
[0033] Optionally, as Figure 3As shown, a first O-ring 14 is installed on the outer surface of the threaded bushing 12, and a second O-ring 16 and an O-ring retaining ring 17 are installed on the inner surface of the threaded bushing 12.
[0034] Specifically, the first O-ring 14 is set as O-ring - 30, and the second O-ring 16 is set as O-ring - 20.
[0035] In this embodiment, by providing the first O-ring 14 and the second O-ring 16, the upper and lower oil cavities can be sealed and isolated. And by providing the O-ring retaining ring 17, the second O-ring 16 can be limited.
[0036] Optionally, as Figure 2 and Figure 3 shown, the top end of the self-centering seat 3 is equipped with an end cap 7 through three third hexagon socket head cap screws 19.
[0037] In this embodiment, by providing the end cap 7, the loss of hydraulic oil in the self-centering seat 3 can be prevented, which is beneficial to ensuring the effect of the self-centering clamping part of the hole and avoiding pollution of the working environment.
[0038] Optionally, as Figure 4 shown, three 1 / 8 threaded plugs 18 are installed in the process oil holes on the outer surface of the self-centering seat 3, and a third O-ring 21 is installed in the oil passage between the self-centering seat 3 and the self-centering spacer block 1.
[0039] Specifically, the third O-ring 21 is set as O-ring - 7.
[0040] In this embodiment, by providing the 1 / 8 threaded plugs 18 and the third O-ring 21, the loss of hydraulic oil in the self-centering seat 3 can be further prevented, which is beneficial to ensuring the effect of the self-centering clamping part of the hole and avoiding pollution of the working environment.
[0041] Working principle of the present utility model: First, install the rough positioning self-centering clamping mechanism on a matching fixture base, and load the part to be machined onto the rough positioning self-centering clamping mechanism. When the part to be machined is loaded, the inner hole will automatically be guided for rough positioning through the guide block 4, and the end face is positioned by the support rod 2. Hydraulic oil enters the internal oil passage in the middle of the self-centering seat 3 through the oil port A22, pushing the upper and lower piston rods 10 to drive the two self-centering shafts 6 to move towards both ends, and pushing the three wedge-shaped slide rods 5 on the upper and lower sides to expand outwards. The self-centering pressing heads 8 installed on the wedge-shaped slide rods 5 clamp the part to be machined, realizing the function of automatic positioning and clamping. When loosening the part, the hydraulic oil enters the internal oil passages at both ends of the self-centering seat 3 through the oil port B23, pushing the upper and lower piston rods 10 to drive the two self-centering shafts 6 to move towards the middle, and pushing the three wedge-shaped slide rods 5 on the upper and lower sides to contract inwards. The self-centering pressing heads 8 installed on the wedge-shaped slide rods 5 loosen the part to be machined, and the part to be machined can be easily taken out. The functions of clamping and loosening the part to be machined are realized, without manual adjustment, and the machining process is efficient and fast.
[0042] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A coarse positioning self-centering clamping mechanism, characterized in that: It comprises an end face positioning part, a hole guide positioning part and a hole self-centering clamping part, the end face positioning part comprises a self-centering cushion block (1) and a support rod (2), a self-centering seat (3) is installed on the self-centering cushion block (1), and the self-centering seat (3) is connected by three first hexagon socket bolts; The guide and positioning parts of the holes are provided in two groups, and the guide and positioning parts of the two holes are provided at the upper and lower ends of the outside of the self-centering seat (3). The guide and positioning parts of the holes each include a guide block (4) and a guide gasket (11). The guide blocks (4) and the guide gaskets (11) are grouped in three and are mounted on the self-centering seat (3) by means of a second hexagon socket head bolt (20); The self-centering clamping part of the hole is provided with two groups, upper and lower, and the two groups of self-centering clamping parts of the hole are arranged at the upper and lower ends inside the self-centering seat (3).
2. The coarse positioning self-centering clamping mechanism according to claim 1, characterized in that: The self-centering clamping part of the hole comprises a piston rod (10), a self-centering shaft (6), an inclined wedge slide rod (5) and a self-centering pressure head (8). The screw part of the piston rod (10) is equipped with a self-centering shaft (6) and connected by an M12 thin nut (13). Three inclined wedge slide rods (5) are installed on the self-centering shaft (6). Three inclined wedge slide rods (5) are installed on the self-centering shaft (6). Adjustment washers (9) and self-centering pressure heads (8) are installed on the inclined wedge slide rods (5) through threads. The self-centering pressure heads (8) are used to clamp the parts to be processed.
3. The coarse positioning self-centering clamping mechanism according to claim 2, characterized in that: The piston rod (10) is provided with an STD Gly ring (15), and the piston rod (10) is provided with a threaded bushing (12). The threaded bushing (12) is fastened to the internal thread of the self-centering seat (3) through a threaded connection to form internal upper and lower oil chambers.
4. The coarse positioning self-centering clamping mechanism according to claim 3, characterized in that: The outer surface of the threaded bushing (12) is provided with a first O-ring (14), and the inner surface of the threaded bushing (12) is provided with a second O-ring (16) and an O-ring retaining ring (17).
5. The coarse positioning self-centering clamping mechanism according to claim 1, characterized in that: The top end of the self-centering seat (3) is provided with an end cover (7) via three third hexagon socket bolts (19).
6. The coarse positioning self-centering clamping mechanism according to claim 1, characterized in that: Three 1 / 8 threaded plugs (18) are installed in the process oil holes on the outer surface of the self-centering seat (3), and a third O-ring (21) is installed in the oil passage between the self-centering seat (3) and the self-centering cushion block (1).