Method for machining a radial brake band of a rotary table

Abstract

The application relates to a method for machining a radial brake ring of a processing turntable, which comprises the following steps: cutting the inner diameter of a ring body to the design size of the inner diameter; machining the outer diameter of the ring body and reserving an outer diameter machining allowance to form a brake ring semi-finished product; machining a threaded hole for connecting with a brake cylinder body; clamping the brake cylinder body to a machining lathe and aligning the coaxiality of the brake cylinder body and a clamp; fixing the brake ring semi-finished product to the brake cylinder body and clamping the brake ring semi-finished product integrally with the clamp; and machining the outer diameter of the brake ring semi-finished product to the design size of the outer diameter. The brake ring is directly installed to the brake cylinder body and then integrally machined, the brake cylinder body supports the brake ring during the machining of the outer diameter, the deformation of the brake ring during the machining is reduced, and the machining precision of the brake ring is improved.

Description

Technical Field

[0001] This application relates to the field of brake ring processing methods, and in particular to a method for processing a turntable radial brake ring. Background Technology

[0002] The direct-drive rotary table uses a torque motor for direct drive, enabling zero-backlash transmission and featuring high transmission accuracy, good transmission rigidity, and excellent dynamic response. To ensure the rotary table can stop precisely at a specific angle and direction and remain in that position for milling and chip removal, a radial brake mechanism with high braking torque and good braking effect is required. The radial brake structure utilizes a brake ring fixed to a braking rigid body. Under hydraulic pressure, the brake ring elastically deforms and expands outward, making close contact with the rotor sleeve of the rotary table to generate braking torque, thus achieving the braking effect. The brake ring's performance requirements necessitate that it be a thin-walled part, as direct machining easily leads to deformation, resulting in high machining difficulty and compromised machining accuracy. Summary of the Invention

[0003] In order to reduce the deformation generated during the machining of the brake ring and improve the machining accuracy of the brake ring, this application provides a method for machining a radial brake ring for a turntable.

[0004] The method for machining a radial brake ring for a turntable provided in this application adopts the following technical solution:

[0005] A method for machining a radial brake ring for a turntable includes the following steps:

[0006] Design dimensions from inner diameter to inner diameter of the cutting ring;

[0007] Machining the outer diameter of the ring and reserving a machining allowance for the outer diameter forms a semi-finished brake ring.

[0008] Machining threaded holes for connection with the brake cylinder body;

[0009] The brake cylinder body is clamped onto the machining lathe, and the coaxiality of the brake cylinder body and the fixture is aligned.

[0010] Fix the semi-finished brake ring onto the brake cylinder body and clamp it together with the fixture;

[0011] Machining the brake ring semi-finished product on a lathe from its outer diameter to the designed outer diameter dimension.

[0012] By adopting the technical scheme, the inner diameter of the ring body is processed first to form a brake ring semi-finished product, the brake ring semi-finished product is fixed integrally with the brake cylinder body, and then the outer diameter of the brake ring semi-finished product is processed integrally, so that the brake ring is directly formed on the brake cylinder body. Since the brake cylinder body supports the brake ring semi-finished product during the processing of the outer diameter, the deformation of the brake ring during the processing can be effectively reduced, the processing difficulty is reduced, and the processing cost is reduced. After the outer diameter of the brake ring is formed, the brake ring does not need to be detached from the cylinder body, and can be directly used integrally, thereby improving the production efficiency. When the brake cylinder body is clamped by the fixture of the lathe, the brake cylinder body is detected and the coaxiality of the brake cylinder body and the fixture is ensured. When the brake ring semi-finished product is fixed to the brake cylinder body, the coaxiality of the brake ring semi-finished product, the brake cylinder body and the fixture can be ensured. Compared with the form that the brake ring is separately processed and then installed on the brake cylinder body, the processing precision of the brake ring is improved, and the braking effect of the brake ring is indirectly improved.

[0013] Preferably, when the brake ring is processed, a cast copper pipe with a size corresponding to that of the brake cylinder body is selected for secondary processing.

[0014] By adopting the technical scheme, the cast copper pipe is processed to form the brake ring, and the processing efficiency is further improved.

[0015] Preferably, when the outer diameter of the ring body is processed and a processing allowance is reserved, the wall thickness of the brake ring semi-finished product is at least 3 times the wall thickness of the brake ring.

[0016] By adopting the technical scheme, a large processing allowance is reserved, and the brake ring semi-finished product is integrally processed after being assembled with the brake cylinder body, so that the brake ring semi-finished product has a certain rigidity and deformation during processing of the brake ring semi-finished product is avoided.

[0017] Preferably, when the coaxiality of the brake cylinder body and the fixture is found, the brake cylinder body is abutted by a dial gauge, and when the dial gauge uniformly jumps, the brake cylinder body and the fixture are considered coaxial.

[0018] By adopting the technical scheme, the coaxiality of the brake cylinder body and the fixture is detected by using the dial gauge, and the installation position of the brake cylinder body is adjusted according to the indication of the dial gauge. When the probe ball head of the dial gauge is abutted against the outer circular surface of the brake cylinder body, and the dial gauge uniformly jumps when the brake cylinder body rotates at a uniform speed, the brake cylinder body and the fixture are considered coaxial, so that the installation accuracy of the brake cylinder body is ensured, and the processing accuracy of the brake ring is ensured.

[0019] Preferably, the brake ring semi-finished product is fixed to the brake cylinder body and integrally clamped with the fixture, and includes the following steps:

[0020] The brake ring semi-finished product is installed so that the inner end face of the brake ring is combined with the positioning stop on the brake cylinder body.

[0021] The stepped surface of the clamp extends into and supports the inner wall surface of the brake ring semi-finished product;

[0022] The internal hexagonal screw is fixed in the threaded hole.

[0023] By adopting the above technical scheme, the positioning stop is pre-machined on the outer diameter of the brake cylinder body, and the positioning precision is very high. Since the inner diameter of the brake ring semi-finished product has been machined in place, the inner diameter of the brake ring semi-finished product is directly matched with the positioning stop on the brake cylinder body, which can guarantee that the brake ring semi-finished product is coaxial with the brake cylinder body. Since the coaxiality of the brake cylinder body and the clamp has been adjusted when the brake cylinder body is clamped by the clamp, it can be guaranteed that the brake ring semi-finished product is also coaxial with the clamp. That is, after the brake ring semi-finished product is fixed, it can be guaranteed that the clamp, the brake cylinder body and the brake ring semi-finished product are coaxial. Therefore, such a machining method can effectively improve the machining precision of the brake ring.

[0024] Preferably, before the brake ring semi-finished product is combined with the brake cylinder body, an O-shaped fluorine rubber sealing ring is sleeved on the brake cylinder body.

[0025] By adopting the above technical scheme, the O-shaped fluorine rubber sealing ring is added between the brake ring semi-finished product and the brake cylinder body, which improves the sealing effect between the brake ring and the brake cylinder body and increases the friction resistance between the brake ring semi-finished product and the brake cylinder body, thereby avoiding relative movement between the brake ring semi-finished product and the brake cylinder body and improving the machining precision of the brake ring.

[0026] Preferably, when machining the outer diameter of the brake ring semi-finished product to the designed size of the outer diameter, the machining is gradually performed in 2-3 times.

[0027] By adopting the above technical scheme, when machining the outer diameter of the brake ring semi-finished product to the designed size, the machining should be performed gradually and uniformly. After one-time machining, the brake ring is statically placed for a certain period of time before secondary machining, thereby reducing the probability of brake ring deformation caused by too fast machining and out-of-control machining force.

[0028] Preferably, after the brake ring is machined, the probe ball head of the micrometer gauge is abutted against the outer diameter of the brake ring to detect the overall outer circle runout of the brake ring and the brake cylinder body.

[0029] By adopting the above technical scheme, after the outer diameter of the brake ring is machined, the machining precision of the brake ring needs to be detected to check whether the axis of the machined brake ring coincides with the axis of the brake cylinder body. When the machining precision of the brake ring is unqualified, the lathe is controlled to perform secondary machining at the corresponding position according to the detection result of the micrometer gauge.

[0030] In summary, the present application has at least one of the following beneficial technical effects:

[0031] 1. The application directly fixes the brake ring semi-finished product with processed inner diameter on the brake cylinder body, and then processes the outer diameter of the brake ring semi-finished product as a whole, so that the brake cylinder body supports the processing of the brake ring semi-finished product, reduces the deformation generated during the processing of the outer diameter of the brake ring, and ensures the coaxiality of the brake ring semi-finished product and the brake cylinder body during installation, thereby improving the installation efficiency and the processing precision of the brake ring;

[0032] 2. By detecting the coaxiality of the brake cylinder body and the fixture on the lathe, and grinding a positioning stop with high positioning precision on the outer diameter of the brake cylinder body, the coaxiality of the brake ring semi-finished product and the brake cylinder body can be ensured when the brake ring semi-finished product is connected with the positioning stop, thereby ensuring the coaxiality of the brake ring semi-finished product, the brake cylinder body and the fixture, and improving the processing precision of the brake ring;

[0033] 3. By gradually processing the brake ring semi-finished product to the right position, the probability of deformation of the brake ring during processing is further reduced BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic view of the brake ring from the top view.

[0035] Figure 2 is a structural schematic view of the brake ring from the A-A direction.

[0036] Figure 3 is an assembly schematic view of the brake ring and the brake cylinder body from the top view

[0037] Figure 4 is Figure 3 an assembly schematic view of the brake ring and the brake cylinder body from the A-A direction.

[0038] Figure 5 is a processing flowchart of the method for processing the radial brake ring of the brake cylinder of the lathe.

[0039] BRIEF DESCRIPTION OF DRAWINGS: 1, brake ring; 11, threaded hole; 2, brake cylinder body; 21, positioning stop; 3, inner hexagonal screw; 4, positioning stop; 5, O-shaped fluorine rubber sealing ring. DETAILED DESCRIPTION

[0040] The application will be further described in detail below with reference to the accompanying drawings Figures 1-5 The application will be further described in detail below with reference to the accompanying drawings

[0041] The embodiment of the application discloses a method for processing the radial brake ring of the brake cylinder of the lathe. Referring to Figures 1-5 , the method for processing the radial brake ring of the brake cylinder of the lathe comprises the following steps:

[0042] S1: cutting the inner diameter of the ring body to the designed size of the inner diameter.

[0043] The ring body is machined by cutting the inner diameter of the cast copper pipe to the inner diameter design size of the brake ring 1 on a lathe.

[0044] S2: Machining the outer diameter of the ring body and reserving the outer diameter machining allowance to form the brake ring 1 semi-finished product.

[0045] After the inner diameter size is machined, the standard wall thickness of the brake ring 1 is machined to form the brake ring 1 semi-finished product, which guarantees that the wall thickness of the brake ring 1 semi-finished product is at least 3 times the standard wall thickness of the brake ring 1, guarantees that the brake ring 1 semi-finished product has a certain rigidity, and avoids deformation during machining of the brake ring 1 semi-finished product.

[0046] S3: Machining the threaded hole 11 for connecting with the brake cylinder body 2.

[0047] The brake ring 1 semi-finished product is clamped to the milling machine, and 16 threaded holes 11 are formed on the end face of one end of the brake ring 1 semi-finished product along the axis of the brake ring 1 semi-finished product.

[0048] S4: Clamping the brake cylinder body 2 to the machining lathe and aligning the coaxiality of the brake cylinder body 2 and the clamp.

[0049] The brake cylinder body 2 is clamped and fixed with the clamp on the machining lathe, and then the probe ball head of the micrometer gauge is abutted against the outer circular surface of the brake cylinder body 2. The machining lathe is started at a uniform rotational speed, the brake cylinder body 2 is rotated at a uniform speed, and when the readings on the micrometer gauge are uniformly fluctuating, it is considered that the brake cylinder body 2 is coaxial with the clamp, thereby guaranteeing the coaxiality of the brake cylinder body 2 and the clamp.

[0050] S5: Fixing the brake ring 1 semi-finished product to the brake cylinder body 2 and clamping it integrally with the clamp. Including the following steps:

[0051] S51: The O-shaped fluorine rubber sealing ring 5 is sleeved on the brake cylinder body 2. On the one hand, the O-shaped fluorine rubber sealing ring 5 can improve the sealing between the brake ring 1 and the brake cylinder body 2, and the O-shaped fluorine rubber sealing ring 5 can increase the friction resistance between the brake ring 1 semi-finished product and the brake cylinder body 2, thereby avoiding relative movement between the brake ring 1 semi-finished product and the brake cylinder body 2.

[0052] S52: The brake ring 1 semi-finished product is sleeved on the brake cylinder body 2, and the brake cylinder body 2 is previously ground to have a positioning stop 4 with extremely high machining precision. When the brake ring 1 semi-finished product is stopped by the positioning stop 4 on the brake cylinder body 2, it is considered that the brake ring 1 semi-finished product is coaxial with the brake cylinder body 2. Since the coaxiality of the brake cylinder body 2 and the clamp has been adjusted when they are clamped together, it can be guaranteed that the brake ring 1 semi-finished product is also coaxial with the clamp, thereby effectively improving the machining precision of the brake ring 1.

[0053] S53: The stepped surface of the clamp extends into and supports the inner wall surface of the brake ring 1 semi-finished product, and the brake ring 1 semi-finished product is clamped together with the clamp.

[0054] S54: The internal hexagonal screw 3 is fixed in the threaded hole 11, and the brake ring 1 semi-finished product is fastened on the brake cylinder body 2.

[0055] S6: The lathe cuts the outer diameter of the brake ring 1 semi-finished product to the designed size.

[0056] During processing, the lathe gradually processes the outer diameter of the brake ring 1 semi-finished product to the right size in 2-3 times, and the slower the processing is, the closer the brake ring 1 outer diameter is to the set size, and the lower the probability of deformation of the brake ring 1 caused by too fast processing and uncontrolled processing force.

[0057] After the brake ring 1 is processed, the dial indicator is used to detect the outer circle runout of the brake ring 1 outer diameter, and the processing precision of the brake ring 1 is detected.

[0058] The implementation principle of the method for processing the radial brake ring of the rotary table is that the brake ring 1 with a reserved outer diameter processing allowance is assembled with the brake cylinder body 2 and then processed as a whole. When the outer diameter of the brake ring 1 is processed, the brake cylinder body 2 inside supports the brake ring 1, reduces the probability of deformation of the brake ring 1 caused by the pressure of the lathe or external vibration, and is beneficial to improve the forming effect of the brake ring 1. The brake cylinder body 2 and the brake ring 1 are clamped on the lathe as a whole, the positioning stop 4 is processed on the brake cylinder body 2 in advance, and the coaxiality of the brake cylinder body 2 and the lathe clamp is checked, so that the brake ring 1, the brake cylinder body 2 and the clamp are coaxial, and the integrated processing form can effectively guarantee the processing precision of the brake ring 1. In summary, the method of the application can effectively reduce the deformation of the brake ring 1 during processing, improve the processing precision of the brake ring 1, and directly fix the brake ring 1 on the brake cylinder body 2 after processing, which can be directly used as a whole, and improve the production efficiency.

[0059] The above are preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A method of machining a radial band brake ring of a machining turntable, characterized in that: It comprises the following steps: Cut the inner diameter of the ring body to the design size of the inner diameter; Process the outer diameter of the ring body and reserve the outer diameter processing allowance to form the brake ring (1) semi-finished product; Process the threaded hole (11) for connecting with the brake cylinder body (2); Clamp the brake cylinder body (2) on the lathe and align the coaxiality of the brake cylinder body (2) and the clamp; Fix the brake ring (1) semi-finished product on the brake cylinder body (2) and clamp it integrally with the clamp; Process the lathe to cut the outer diameter of the brake ring (1) semi-finished product to the design size of the outer diameter.

2. The method of claim 1, wherein: When processing the brake ring (1), choose a cast copper pipe that meets the size of the brake cylinder body (2) for secondary processing.

3. The method of claim 1, wherein: When processing the outer diameter of the ring body and reserving the outer diameter processing allowance, form the brake ring (1) semi-finished product, so that the wall thickness of the brake ring (1) semi-finished product is at least 3 times the wall thickness of the brake ring (1).

4. The method of claim 1, wherein: When aligning the coaxiality of the brake cylinder body (2) and the clamp, use the dial indicator to abut against the outer diameter of the brake cylinder body (2), and when the dial indicator jumps uniformly, the brake cylinder body (2) and the clamp are considered coaxial.

5. The method of claim 1, wherein: Fixing the brake ring (1) semi-finished product on the brake cylinder body (2) and clamping it integrally with the clamp comprises the following steps: Install the brake ring (1) semi-finished product so that the inner end face of the brake ring (1) is combined with the positioning stop (4) on the brake cylinder body (2); The stepped surface of the clamp extends into and supports on the inner wall surface of the brake ring (1) semi-finished product; Fix the internal hexagonal screw (3) one by one in the threaded hole (11).

6. The method of claim 5 wherein: Before the brake ring (1) semi-finished product is combined with the brake cylinder body (2), an O-shaped fluorine rubber sealing ring (5) is sleeved on the brake cylinder body (2).

7. The method of claim 1 wherein: When processing the outer diameter of the brake ring (1) semi-finished product to the design size of the outer diameter, process gradually for 2-3 times.

8. The method of claim 1 wherein: After the brake ring (1) is processed, abut the probe ball head of the dial indicator against the outer diameter of the brake ring (1) to detect the outer circle runout of the brake ring (1) and the brake cylinder body (2) as a whole.

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