Method and apparatus for machining an inner spherical face centring groove using a four-axis tooling method

Abstract

The application discloses a method and device for processing an inner spherical surface centripetal groove by using a four-axis process tooling method, and comprises the following steps: S1, material selection: selecting aluminum as the tooling material, since the hardness of the aluminum tooling is low, the aluminum tooling is easy to process; S2, machine clamping: the aluminum tooling selected in S1 is clamped on the four-axis milling machine by the cooperation of the threaded rod, the pressing plate and the nut, and the aluminum tooling is subjected to the secondary processing. The method and device for processing the inner spherical surface centripetal groove by using the four-axis process tooling method selects the aluminum tooling with a specific specification, then clamps the aluminum tooling on the four-axis milling machine by the screw rod, the pressing plate and the nut, then starts the four-axis milling machine to mill the reference edge of the aluminum tooling, then cooperates the outer edge surface of the part with the tooling fixture, and then starts the sawtooth three-flank milling cutter to mill three right-angled triangular centripetal grooves on the inner edge surface of the part, so that the machining difficulty of the existing four-axis milling machine is solved, and the machining cost is greatly saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inner spherical surface centripetal groove processing, in particular to a method and device for processing an inner spherical surface centripetal groove by using a four-axis process tooling method. BACKGROUND

[0002] The most common spherical surface processing is mostly processed on a general lathe, and a worm gear is used to process an inner spherical surface. A workpiece is clamped on a jaw, a special tool for a spherical surface is installed on a lathe tool holder, a worm gear and a worm wheel are used as main components, a rotation center of a cutting tool is consistent with a rotation center of the workpiece, and a certain spherical surface is milled by a milling cutter. In order to obtain a required arc surface, the position and angle of the milling cutter need to be changed. The essence of this method is to make the milling cutter perpendicular to the rotation direction of the indexing head, and then rotate again at a certain equal distance.

[0003] The prior art has the following problems in use:

[0004] 1. Due to the irregularity of the parts, five-axis machining is the best choice, but considering the popularity and economy of the five-axis machine tool, the selection of the five-axis milling machine causes a large amount of cost loss. The present application selects a four-axis machining clamping fixture to complete the machining of the part, solves the problem and greatly saves the machining cost.

[0005] Therefore, technical upgrading is needed to meet market demand. SUMMARY

[0006] The present application aims to provide a method and device for processing an inner spherical surface centripetal groove by using a four-axis process tooling method, so as to solve the problem that, due to the irregularity of the parts, five-axis machining is the best choice, but considering the popularity and economy of the five-axis machine tool, the selection of the five-axis milling machine causes a large amount of cost loss.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a method and device for processing an inner spherical surface centripetal groove by using a four-axis process tooling method, comprising the following steps:

[0008] S1, material selection: selecting aluminum as the tooling material, because the hardness of the aluminum tooling is low and easy to process;

[0009] S2, machine clamping: the aluminum tooling selected in S1 is clamped on the four-axis milling machine through the cooperation of the threaded rod, the pressing plate and the threads, and is subjected to secondary processing;

[0010] S3, tool selection: because the part is hemispherical and a right-angled triangular centripetal groove needs to be processed, a sawtooth three-flank milling cutter is selected as the cutting tool, and the sawtooth three-flank milling cutter is installed on the four-axis milling machine;

[0011] S4, making reference: start the four-axis milling machine, refer to the aluminum die cutting feed and speed table, give the milling cutter specific feed and speed, take the outer spherical surface as the machining positioning surface, process the half-sphere covering surface on the aluminum material tooling, process the positioning surface of the small circle at the bottom, process the positioning surface of the two side sector surfaces and the pressing hole position of the top large surface;

[0012] S5, assembling: place the outer spherical surface of the parts on the half-sphere covering surface of the aluminum material, and connect the aluminum material tooling with the parts through the pressing hole on the half-sphere covering surface;

[0013] S6, milling groove: start the four-axis milling machine, give the sawtooth three-flank milling cutter specific feed and speed, along the inner spherical surface, complete the machining of three right triangle grooves through the cooperation of the four-axis rotation angle and the sawtooth three-flank milling cutter.

[0014] Preferably, the aluminum material tooling selected in S1 has a specification of 510mm*340mm*210mm, and the number of aluminum material toolings selected in S1 is two.

[0015] Preferably, the reference making in S4 includes making a positioning surface, making a covering surface and making a pressing hole, and the concave arc of the covering surface is consistent with the arc of the outer spherical surface of the parts.

[0016] Preferably, the cross section of the three right triangle centripetal grooves cut in S6 is fan-shaped.

[0017] Preferably, a device for machining an inner spherical centripetal groove by a four-axis process tooling method comprises a tooling clamp, wherein the top of the tooling clamp is provided with a covering surface, the two sides of the tooling clamp are provided with sector surfaces, the bottom surface of the tooling clamp is provided with a circular positioning surface, the surface of the covering surface is provided with a pressing hole, the covering surface is connected with a half-sphere, and the inner edge surface of the half-sphere is provided with three centripetal grooves.

[0018] Preferably, the covering surface is recessed on the surface of the tooling clamp, and the sector surfaces are integrated with the tooling clamp.

[0019] Preferably, the transverse dimension of the circular positioning surface is greater than the opening dimension of the inner wall of the pressing hole.

[0020] Preferably, the pressing hole is located on the longitudinal central axis of the tooling clamp, and the cross section of the pressing hole is circular.

[0021] Preferably, the centripetal grooves are distributed side by side on the inner edge surface of the half-sphere, and the outer edge surface of the half-sphere is adapted to the top of the tooling clamp.

[0022] Compared with the prior art, the device has the following beneficial effects:

[0023] 1. The method and device for machining the inner spherical surface centripetal groove by four-axis process tooling method selects a specific specification of aluminum material tooling, then clamps the aluminum material tooling on the four-axis milling machine through the screw rod, pressing plate and nut, then starts the four-axis milling machine, mills the reference edge of the aluminum material tooling, then cooperates the outer edge surface of the part with the tooling fixture, then starts the sawtooth three-flank milling cutter, mills three right-angled triangular centripetal grooves on the inner edge surface of the part, solves the existing four-axis milling machine machining problem and greatly saves the processing cost.

[0024] 2. The method and device for machining the inner spherical surface centripetal groove by four-axis process tooling method controls the four-axis milling machine during the process of making the basic edge, then sets different values by referring to the aluminum die cutting speed and feeding reference table, the cutting efficiency can be effectively improved, the cutting tool is protected, and the service life of the cutting tool is increased. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The flow structure diagram of the present application is shown in the figure;

[0026] Figure 2 The step structure diagram of the present application is shown in the figure;

[0027] Figure 3 The hemispherical structure diagram of the present application is shown in the figure;

[0028] Figure 4 The tooling fixture structure diagram of the present application is shown in the figure;

[0029] Figure 5 The centripetal groove cross section structure diagram of the present application is shown in the figure;

[0030] Figure 6 The centripetal groove top view structure diagram of the present application is shown in the figure.

[0031] In the figure: 1, tooling fixture; 2, cladding surface; 3, sector surface; 4, circular positioning surface; 5, pressing hole; 6, hemispherical body; 7, centripetal groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] Please refer to Figures 1-6 , the present application provides a technical solution: a method and device for machining the inner spherical surface centripetal groove by four-axis process tooling method, comprising the following steps:

[0034] S1. Material selection: Aluminum is selected as the tooling material because aluminum tooling has low hardness and is easy to process;

[0035] S2. Mounting and clamping: The aluminum tooling selected in S1 is mounted on the machine. The aluminum tooling is clamped on the four-axis milling machine through the cooperation of threaded rods, pressure plates and threads for processing.

[0036] S3. Tool selection: Since the part is hemispherical and a right-angled triangular radial groove 7 needs to be machined, the cutting tool selected is a serrated three-sided end mill, and the serrated three-sided end mill is mounted on a four-axis milling machine.

[0037] S4. Make a reference: Start the four-axis milling machine, refer to the aluminum mold cutting feed and speed comparison table, give the milling cutter a specific feed and speed, use the outer spherical surface as the machining positioning surface, machine the hemispherical covering surface 2 on the aluminum tooling, machine the positioning surface of the bottom small circle, machine the positioning surface of the fan-shaped surfaces on both sides and the position of the pressing hole 5 on the top large surface.

[0038] S5. Assembly: Place the outer spherical surface of the component on the top hemispherical covering surface 2 of the aluminum material, and connect the aluminum material tooling to the component through the press-fitting hole 5 opened on the hemispherical covering surface 2.

[0039] S6. Milling: Start the four-axis milling machine, give the sawtooth three-sided end mill a specific feed and speed, and complete the machining of three right-angled triangular grooves along the inner spherical surface by cooperating with the four-axis rotation angle and the sawtooth three-sided end mill.

[0040] Reference Figure 3 , Figure 4 The aluminum tooling selected in S1 has the following specifications: 510mm*340mm*210mm, and the number of aluminum tooling selected in S1 is two pieces.

[0041] Reference Figure 4 The reference in S4 includes: making a positioning surface, making a covering surface, and making a press-fitting hole. The curvature of the notch of the covering surface 2 matches the curvature of the outer spherical surface of the component.

[0042] Reference Figure 5 The cross-section of the three right-angled triangular centripetal grooves 7 cut in S6 is fan-shaped;

[0043] Reference Figures 3-6 A device for machining an inner spherical surface concentric groove using a four-axis process tooling method includes: a tooling fixture 1, a covering surface 2 on the top of the tooling fixture 1, fan-shaped surfaces 3 on both sides of the tooling fixture 1, a circular positioning surface 4 on the bottom surface of the tooling fixture 1, a pressing hole 5 on the surface of the covering surface 2, a hemisphere 6 connected to the surface of the covering surface 2, and three concentric grooves 7 on the inner edge surface of the hemisphere 6;

[0044] Referring to Figure 4 , the covering surface 2 is recessed in the surface of the tool fixture 1, and the fan-shaped surface 3 is in an integrated structure with the tool fixture 1;

[0045] Referring to Figure 4 , the transverse dimension of the circular positioning surface 4 is greater than the opening dimension of the inner wall of the press-fit hole 5;

[0046] Referring to Figure 4 , the press-fit hole 5 is located on the longitudinal central axis of the tool fixture 1, and the cross section of the press-fit hole 5 is circular;

[0047] Referring to Figure 3 , the centripetal grooves 7 are distributed side by side on the inner edge surface of the hemispherical body 6, and the outer edge surface of the hemispherical body 6 is adapted to the top of the tool fixture 1.

[0048] Working principle: as Figures 1-6 shown, in the method and device for processing the centripetal grooves of the inner spherical surface using the four-axis process tool method, first, a specific specification of aluminum tooling is selected, then the aluminum tooling is clamped on the four-axis milling machine through the screw rod, the pressing plate and the nut, then the four-axis milling machine is started to mill the reference edge of the aluminum tooling, wherein the milling of the reference edge includes: making the positioning surface, making the covering surface and making the press-fit hole, then the outer edge surface of the part is matched with the tool fixture 1, then the sawtooth three-flank milling cutter is started to mill three centripetal grooves 7 in the form of right-angled triangles on the inner edge surface of the part, solving the existing four-axis milling machine processing problem and greatly saving the processing cost; then in the process of making the basic edge, the operator controls the four-axis milling machine, then refers to the aluminum die cutting speed and feeding reference table to set different values, the speed and feeding used for making the positioning surface, making the covering surface and making the press-fit hole are different, which can effectively improve the cutting efficiency, protect the cutting tool and increase the service life of the cutting tool, which is the characteristics of the method and device for processing the centripetal grooves of the inner spherical surface using the four-axis process tool method.

[0049] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of machining an inner spherical face raceway with a four-axis process tooling method, characterized by, It comprises the following steps: S1, material selection: select aluminum as the tool material, because the hardness of aluminum tool is low, it is easy to process; S2, machine clamping: the aluminum tool selected in S1 is clamped on the four-axis milling machine through the cooperation of the threaded rod, the pressing plate and the thread, and the machining is carried out; S3, tool selection: because the part is hemispherical and needs to process a right triangle centripetal groove, a sawtooth three-flank milling cutter is selected and installed on the four-axis milling machine; S4, make reference: start the four-axis milling machine, refer to the aluminum die cutting feed and speed table, give the milling cutter specific feed and speed, take the outer spherical surface as the machining positioning surface, process the hemispherical cladding surface on the aluminum tool, process the positioning surface of the small circle at the bottom, process the positioning surface of the two side sector surfaces and the pressing hole position of the top large surface; S5, assembly: place the outer spherical surface of the part on the top hemispherical cladding surface of the aluminum material, and connect the aluminum tool with the part through the pressing hole on the hemispherical cladding surface; S6, milling groove: start the four-axis milling machine, give the sawtooth three-flank milling cutter specific feed and speed, along the inner spherical surface, complete the processing of three right triangle centripetal grooves through the cooperation of four-axis rotation angle and sawtooth three-flank milling cutter. In the above steps, the device for processing the inner spherical surface centripetal groove by four-axis process tooling method, the device for processing the inner spherical surface centripetal groove by four-axis process tooling method comprises: a tool clamp (1), the top of the tool clamp (1) is provided with a cladding surface (2), the two sides of the tool clamp (1) are provided with sector surfaces (3), the bottom surface of the tool clamp (1) is provided with a circular positioning surface (4), the surface of the cladding surface (2) is provided with a pressing hole (5), the surface of the cladding surface (2) is connected with a hemispherical body (6), and three centripetal grooves (7) are arranged on the inner surface of the hemispherical body (6).

2. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The aluminum tool selected in S1 has a specification of 510mm*340mm*210mm, and the number of aluminum tools selected in S1 is two.

3. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The reference making in S4 includes making positioning surface, making cladding surface and making pressing hole, and the concave curvature of the cladding surface is consistent with the curvature of the outer spherical surface of the part.

4. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The cross section of the three right triangle centripetal grooves cut in S6 is fan-shaped.

5. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The cladding surface (2) is recessed on the surface of the tool clamp (1), and the sector surfaces (3) are integrated with the tool clamp (1).

6. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The transverse dimension of the circular positioning surface (4) is greater than the inner wall opening size of the pressing hole (5).

7. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The pressing hole (5) is located on the longitudinal center axis of the tool clamp (1), and the cross section of the pressing hole (5) is circular.

8. A method of machining an inner spherical surface facing a raceway according to claim 1, wherein: The centripetal grooves (7) are distributed side by side on the inner surface of the hemispherical body (6), and the outer surface of the hemispherical body (6) is adapted to the top of the tool clamp (1).

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