Universal coupling middle sliding groove inner hole machining tool and method

Abstract

The invention discloses a universal coupling middle sliding groove inner hole machining tool and method.The tool comprises a machine tool connecting base, the bottom of the machine tool connecting base is connected with a machine tool, and a universal coupling to be machined is fixed to the upper surface of the machine tool connecting base to be machined. One end of the locking assembly is detachably connected with the universal coupling arranged on the machine tool connecting base, the other end of the locking assembly is detachably connected with the upper surface of the machine tool connecting base, and the locking assembly is used for fixing the universal coupling to the machine tool connecting base. And the fixed base is arranged on the upper surface of the machine tool connecting base, and the universal coupling to be machined is connected with the machine tool connecting base through the fixed base. And the milling cutter assembly is used for machining the inner hole of the middle sliding groove of the universal coupling. According to the machining tool and method for the complex inner hole of the middle sliding groove of the universal coupling, the machining time is shortened, the part rejection rate is reduced while the machining precision is guaranteed, meanwhile, the defects of a linear cutting machining method are effectively overcome, the machining cost is reduced, flexibility is high, and interchangeability is high.

Description

Technical Field

[0001] This invention belongs to the field of marine propulsion technology, specifically relating to a tooling and method for machining the complex inner hole of the intermediate groove of a universal coupling. Background Technology

[0002] Universal joints are an important component of marine transmission systems. The intermediate slide, as one of the key components of a universal joint, mainly supports the axial movement of the torsion bearing and realizes the transmission of motion and torque between the intermediate shaft and the propeller. The inner hole of the intermediate slide usually has a relatively complex inner surface. The machining quality of its inner surface seriously affects the axial movement and life of the torsion bearing, and further determines the transmission efficiency of the universal joint.

[0003] Currently, in the field of internal surface processing of large metal parts, wire EDM is mainly used. It removes material through the principle of electrical discharge etching, which can ensure a certain level of precision. However, the processing cost is high, the cutting speed is slow, and the risk of electrode wire breakage occurs frequently. Especially in the forming process, the breakage of the electrode wire means the scrapping of the part, causing a sharp increase in processing costs. Moreover, wire EDM is mostly a hot working process. During the processing, a recast layer will be generated on the processed surface, which will have an adverse effect on the fatigue strength of the metal surface. At the same time, different parts require customized special fixtures, which further affects the efficiency of part processing. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a tooling and method for machining complex inner holes in the intermediate sliding groove of a universal coupling. While ensuring machining accuracy, it shortens machining time, reduces part scrap rate, effectively avoids the disadvantages of wire cutting machining, reduces machining costs, and offers high flexibility and interchangeability.

[0005] The objective of this invention is achieved through the following technical solution: a tooling for machining the inner hole of the intermediate sliding groove of a universal coupling, comprising:

[0006] The machine tool connecting seat is connected to the machine tool at the bottom, and the universal coupling to be processed is fixed on the upper surface of the machine tool connecting seat for processing.

[0007] The locking assembly has one end detachably connected to the universal coupling mounted on the machine tool mounting base, and the other end detachably connected to the upper surface of the machine tool mounting base, used to fix the universal coupling to the machine tool mounting base.

[0008] A fixed base is set on the upper surface of the machine tool connecting seat, and the universal coupling to be processed is connected to the machine tool connecting seat through the fixed base.

[0009] The milling cutter assembly is used to machine the inner hole of the central groove of the universal joint.

[0010] Preferably, the upper surface of the machine tool connecting seat is provided with a threaded T-slot.

[0011] Preferably, the locking assembly includes:

[0012] The first locking mechanism is vertically connected to the second locking mechanism at one end, and the other end is a free end, which presses against the upper surface of the universal coupling to be processed.

[0013] The second locking mechanism is connected to the first locking mechanism at one end and fixed to the machine tool connecting seat at the other end. The height of the second locking mechanism is adjustable in the vertical direction.

[0014] Preferably, the second locking mechanism includes:

[0015] The fixed plate is fixed to the upper surface of the machine tool connecting seat, and the head of the fixed plate is threaded.

[0016] The cylinder barrel is connected to the head of the fixed plate, and the inside of the cylinder barrel is hollow.

[0017] A threaded telescopic rod is installed inside the cylinder and moves up and down via threads. The top of the threaded telescopic rod is connected to the first locking mechanism.

[0018] Preferably, the threaded telescopic rod has threads on its surface, a wrench working surface machined on its upper part, and a ball head shape.

[0019] Preferably, the locking assembly further includes a third locking mechanism, which is slidably connected to the first locking mechanism and can move along the length of the first locking mechanism. The third locking mechanism passes through the first locking mechanism and its height is adjustable in the direction perpendicular to the first locking mechanism.

[0020] Preferably, the locking components include at least four, which are respectively disposed at the four corners of the machine tool connecting seat.

[0021] Preferably, the fixed base includes:

[0022] Bottom mounting plate, connecting to the machine tool mounting bracket.

[0023] The upper milling plate has an inner hole with the same structure as the middle slide groove, and a fixing pin hole for the middle slide groove is also machined.

[0024] The middle support plate is located between the bottom fixing plate and the upper milling plate.

[0025] Preferably, the milling cutter assembly includes a milling cutter and a milling head connected by screws.

[0026] In addition to providing a tooling for machining the inner hole of the intermediate slide groove of a universal coupling, the present invention also provides a method for machining the inner hole of the intermediate slide groove of a universal coupling using the above-mentioned tooling, comprising the following steps:

[0027] Fix the machine tool connecting seat to the machine tool, and fix the fixing base to the machine tool connecting seat; initially fix the universal coupling to be processed to the upper surface of the machine tool connecting seat through the fixing base, and use at least four locking components to fix the four corners of the universal coupling to be processed respectively. Operate the machine tool and use the milling cutter assembly to process the middle slide groove of the universal coupling to be processed.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention provides a tooling and method for machining complex inner holes in the intermediate groove of a universal coupling, ensuring machining accuracy while shortening machining time and offering strong interchangeability. The tooling provided by this invention shortens machining time by modifying existing wire EDM machining methods and using milling instead, avoiding the disadvantages of long machining times with slow wire EDM and poor accuracy with fast wire EDM. It also reduces dependence on the electrode wire, avoids the impact of surface recasting layers on the local strength of the intermediate groove, and reduces the scrap rate of parts.

[0030] This invention uses a pressure plate and a fixed base to perform dual positioning of the workpiece, which reduces workpiece shaking and local deformation during processing and improves processing accuracy.

[0031] The tooling provided by this invention can flexibly adjust the height and orientation of the locking components according to the size of the parts. One set of tooling can meet the processing requirements of parts of different sizes, without the need for each set of parts to be equipped with a special fixture, and has strong interchangeability. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the tooling structure for machining the complex inner hole of the intermediate groove of the universal coupling in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the locking assembly structure in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the pressure plate structure in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the threaded telescopic rod structure in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the intermediate chute structure in an embodiment of the present invention;

[0037] Figure 6 For reference, a schematic diagram of the fixed base structure in the embodiment of the invention is provided;

[0038] Figure 7 A schematic diagram of the milling cutter assembly structure is provided for reference in the embodiments of the invention.

[0039] 1 is the machine tool connecting seat; 2 is the locking assembly; 3 is the fixed plate; 4 is the cylinder; 5 is the threaded telescopic rod; 5.1 is the thread; 5.2 is the ball head; 5.3 is the wrench working surface; 6 is the pressure plate; 7 is the threaded pressure rod; 8 is the head locking nut; 9 is the tail locking nut; 10 is the fixed base; 10.1 is the bottom fixed plate; 10.2 is the upper milling plate; 10.3 is the middle support plate; 10.4 is the middle slide groove fixing pin hole; 11 is the middle slide groove; 12 is the milling cutter assembly; 13 is the milling cutter; 14 is the milling head. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] like Figure 1 As shown, the technical solution of the present invention provides a tooling for machining the inner hole of the intermediate sliding groove of a universal coupling, characterized in that: the tooling includes:

[0042] Machine tool connecting seat 1, the bottom of which is connected to the machine tool, and the universal coupling to be processed is fixed on the upper surface of machine tool connecting seat 1 for processing;

[0043] The locking assembly 2 is detachably connected at one end to the universal coupling mounted on the machine tool connecting seat 1, and at the other end to the upper surface of the machine tool connecting seat 2. It is used to fix the universal coupling on the machine tool connecting seat 1. The locking assembly 2 is used to press the upper surface of the part to prevent the part from affecting the machining accuracy due to local deformation during the machining process.

[0044] The fixed base 10 is set on the upper surface of the machine tool connecting seat 1, and the universal coupling to be processed is connected to the machine tool connecting seat 1 through the fixed base 10;

[0045] The milling cutter assembly 12 is used to mill the inner hole of the intermediate slide of the universal coupling.

[0046] Figure 1 In the process, the universal coupling is located at the intermediate groove 11.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the upper surface of the machine tool connecting seat 1 is provided with a threaded T-slot. The bottom of the machine tool connecting seat 1 is connected to the machine tool by threads or splines, and the surface is provided with a T-slot, which can be connected to the locking assembly 2 by welding. The intermediate slide rail fixing base 10 is used to fix and position the workpiece to be processed, and is also fixed to the T-slot on the surface of the machine tool connecting seat 1 by threads.

[0048] like Figure 1 As shown, in one embodiment of the present invention, the locking components include at least four, which are respectively disposed at the four corners of the machine tool connecting seat.

[0049] In one embodiment of the present invention, the locking assembly includes:

[0050] The first locking mechanism is vertically connected to the second locking mechanism at one end, and the other end is a free end, which presses against the upper surface of the universal coupling to be processed; the second locking mechanism is connected to the first locking mechanism at one end, and the other end is fixed on the machine tool connecting seat 1, and the height of the second locking mechanism is adjustable in the vertical direction.

[0051] like Figure 2 As shown, in one embodiment of the present invention, the second locking mechanism includes:

[0052] The fixed plate 3 is connected to the machine tool connecting seat 1 by welding at the bottom. The head of the fixed plate 3 is threaded to support the cylinder 4. It can also be replaced in real time according to the height of the processed parts.

[0053] Cylinder 4 is connected to the head of fixed plate 3, and the inside of cylinder 4 is hollow;

[0054] The threaded telescopic rod 5 is installed inside the cylinder 4 and moves up and down via threads. The top of the threaded telescopic rod 5 is connected to the first locking mechanism. As a further optimization of the above embodiment, the threaded telescopic rod 5 has threads 5.1 on its surface, a locking auxiliary surface 5.2 machined in the middle as a wrench working surface, and a ball head 5.3 at its head.

[0055] like Figure 2 As shown, in one embodiment of the present invention, the locking assembly further includes a third locking mechanism, which is slidably connected to the first locking mechanism and can move along the length of the first locking mechanism. The third locking mechanism passes through the first locking mechanism and its height is adjustable in the direction perpendicular to the first locking mechanism. In this embodiment, the first locking mechanism is a pressure plate 6, and its structure is as follows: Figure 3 As shown, the bottom of the pressure plate 6 is machined with a ball socket, which works in conjunction with the threaded telescopic rod 5. The angle of the pressure plate 6 can be flexibly adjusted according to the spatial position of the part. A groove is machined in the middle position. The third locking mechanism is a threaded pressure rod 7, the cross-sectional view of which is shown below. Figure 4As shown, the threaded pressure rod 7 has a threaded structure and moves within the middle groove of the pressure plate 6. The head of the rod presses against the middle groove 11 via the head locking nut 8, and the tail of the rod is locked in place by the tail locking nut 9. During operation, the height of the threaded telescopic rod 5 and the orientation of the pressure plate 6 are adjusted according to the spatial position of the middle groove 11. Then, the threaded pressure rod 7, along with the locking of the head locking nut 8 and the tail locking nut 9, and the machine tool connecting seat 1, presses against the middle groove 11 to prevent it from shaking. In this embodiment, the structure of the middle groove 11 is as follows... Figure 5 As shown.

[0056] like Figure 6 As shown, in one embodiment of the present invention, the fixing base includes:

[0057] The bottom fixing plate 10.1 is connected to the machine tool connecting seat 1. The bottom fixing plate 10.1 is machined with round pin holes and is connected to the machine tool connecting seat 1 by bolts.

[0058] The upper milled plate 10.2 has a complex inner hole with the same structure as the middle slide groove 11, which is machined in the middle part by means of machining, and a middle slide groove fixing pin hole 10.4 is also machined.

[0059] The middle support plate 10.3 is set between the bottom fixed plate 10.1 and the upper milling plate 10.2. The middle support plate 10.3 is used to adjust the upper milling plate 10.2 to a certain height to prevent the milling cutter 13 from hitting the bottom fixed plate 10.1 and the machine tool connecting seat 1, and to prevent damage to the milling cutter 13 and the middle slide 11.

[0060] like Figure 7 As shown, in one embodiment of the present invention, the milling cutter assembly 12 includes a milling cutter 13 and a milling head 14. The milling cutter 13 and the milling head 14 are connected by screws. The bottom of the milling cutter 13 is slotted to reduce its weight. During operation, the milling cutter 13 mills the intermediate groove 11 through its side plane.

[0061] In addition to providing a tooling for machining the inner hole of the intermediate slide groove of a universal coupling, the present invention also provides a method for machining the inner hole of the intermediate slide groove of a universal coupling using the above-mentioned tooling, comprising the following steps:

[0062] Fix the machine tool connecting seat 1 on the machine tool and fix the fixing base 10 on the machine tool connecting seat 1; initially fix the universal coupling to be processed on the upper surface of the machine tool connecting seat 1 through the fixing base 10, use at least four locking components 2 to fix the four corners of the universal coupling to be processed respectively, operate the machine tool, and process the middle slide groove 11 of the universal coupling to be processed through the milling cutter assembly 12.

[0063] In this embodiment, the machine tool connecting seat 1 is connected to the machining center worktable by bolts or splines, the locking assembly 2 and the intermediate slide groove fixing base 10 clamp and position the intermediate slide groove 11 in both directions, and the milling cutter assembly 12 is connected to the machining center tool mounting fixture to realize the milling treatment of the complex inner surface of the intermediate slide groove 11.

[0064] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tooling for machining the inner hole of the intermediate sliding groove of a universal coupling, characterized in that: The tooling includes: The machine tool connecting seat (1) is connected to the machine tool at the bottom. The universal coupling to be processed is fixed on the upper surface of the machine tool connecting seat (1) for processing. The locking assembly (2) is detachably connected at one end to the universal coupling provided on the machine tool connecting seat (1) and at the other end to the upper surface of the machine tool connecting seat (2), and is used to fix the universal coupling on the machine tool connecting seat (1). A fixed base (10) is provided on the upper surface of the machine tool connecting seat (1), and the universal coupling to be processed is connected to the machine tool connecting seat (1) through the fixed base (10); The milling cutter assembly (12) is used to machine the inner hole of the intermediate groove of the universal coupling.

2. The tooling for machining the inner hole of the intermediate sliding groove of a universal coupling as described in claim 1, characterized in that: The upper surface of the machine tool connecting seat (1) is provided with a threaded T-slot.

3. The tooling for machining the inner hole of the intermediate sliding groove of a universal coupling as described in claim 1, characterized in that: The locking components include at least four, which are respectively arranged at the four corners of the machine tool connecting seat.

4. The tooling for machining the inner hole of the intermediate sliding groove of a universal coupling as described in claim 1, characterized in that: The locking assembly includes: The first locking mechanism is vertically connected to the second locking mechanism at one end, and the other end is a free end, which presses against the upper surface of the universal coupling to be processed. The second locking mechanism is connected at one end to the first locking mechanism and at the other end to the machine tool connecting seat (1). The height of the second locking mechanism is adjustable in the vertical direction.

5. The tooling for machining the inner hole of the intermediate slide groove of a universal coupling as described in claim 4, characterized in that: The second locking mechanism includes: A fixed plate (3) is fixed on the upper surface of the machine tool connecting seat (1), and the head of the fixed plate (3) is provided with threads; The cylinder (4) is connected to the head of the fixed plate (3), and the cylinder (4) is hollow inside; A threaded telescopic rod (5) is installed inside the cylinder (4) and moves up and down through threads. The top of the threaded telescopic rod (5) is connected to the first locking mechanism.

6. The tooling for machining the inner hole of the intermediate slide groove of a universal coupling as described in claim 5, characterized in that: The threaded telescopic rod (5) has a thread (5.1) on its surface, a wrench working surface (5.2) on its upper part, and a ball head (5.3) shape at its head.

7. The tooling for machining the inner hole of the intermediate sliding groove of a universal coupling as described in claim 4, characterized in that: The locking assembly further includes a third locking mechanism, which is slidably connected to the first locking mechanism and can move along the length of the first locking mechanism. The third locking mechanism passes through the first locking mechanism and its height is adjustable in the direction perpendicular to the first locking mechanism.

8. The tooling for machining the inner hole of the intermediate slide groove of a universal coupling as described in claim 1, characterized in that: The fixed base includes: The bottom fixing plate (10.1) is connected to the machine tool connecting seat (1); The upper milling plate (10.2) has an inner hole with the same structure as the middle slide groove through machining, and also has a middle slide groove fixing pin hole (10.4). A middle support plate (10.3) is disposed between the bottom fixing plate (10.1) and the upper milling plate (10.2).

9. The tooling for machining the inner hole of the intermediate sliding groove of a universal coupling as described in claim 1, characterized in that: The milling cutter assembly (12) includes a milling cutter (13) and a milling head (14) connected by screws.

10. A method for machining the inner hole of the intermediate sliding groove of a universal coupling, characterized in that: The tooling described in any one of claims 1-9 is used to machine the inner hole of the intermediate slide groove of the universal coupling, the method comprising the following steps: The machine tool connecting seat (1) is fixed on the machine tool, and the fixed base (10) is fixed on the machine tool connecting seat (1); the universal coupling to be processed is initially fixed on the upper surface of the machine tool connecting seat (1) through the fixed base (10), and at least four locking components (2) are used to fix the four corners of the universal coupling to be processed respectively. The machine tool is operated, and the middle slide groove (11) of the universal coupling to be processed is processed through the milling cutter assembly (12).

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