Rigid honing head

Abstract

The utility model discloses a rigid honing head which comprises a body, oilstone seats capable of being expanded outwards in parallel are arranged on the body, a hydraulic cylinder capable of horizontally pushing out the oilstone seats is arranged in the body, and the oilstone seats are divided into a coarse oilstone group and a fine oilstone group according to installed oilstones. An oil cylinder communicated with the hydraulic cylinder through an oil way is arranged in the body, a piston is arranged in the oil cylinder, a push rod for driving the piston to push out and suck back hydraulic oil in the oil cylinder is installed in the body, the oil way is communicated with the buffer cylinder through a buffer pipe, and a control valve is assembled on the buffer pipe. According to the rigid honing head, the buffering cylinder is arranged, so that oil can flow back to compressed gas when the stress of the oilstone exceeds a limited range, the oil can be reset when the stress recovers, flexible honing is formed, and meanwhile, the oilstone is protected from being damaged due to excessive stress.

Description

Technical Field

[0001] The utility model relates to the technical field of a honing head. Background Art

[0002] Honing is a type of grinding. Different from the rigid clamping method of internal grinding, it is a flexible processing. Because there is no way to ensure the precise concentricity between the honing head and the hole, it is made into a floating method, or the honing head floats, or the part floats, in order to prevent the honing head and the part from getting stuck during processing. Therefore, when the part floats, the honing head is usually rigidly fixed.

[0003] However, for equipment with floating parts and rigidly fixed honing heads, conventional oilstones are in a fixed state when expanded. In the initial state, the inside of the workpiece is not smooth and the concentricity is low. During the honing process, the oilstone is still subjected to excessive force and has no space to move, resulting in damage to the oilstone or jamming of the oilstone. Therefore, technical improvements are made to the existing honing heads and this application is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a rigid honing head to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rigid honing head comprises a main body, on which is arranged an oilstone seat which can expand outward in parallel, inside of which is arranged a hydraulic cylinder which can push out the oilstone seat horizontally, the oilstone seat being divided into a coarse oilstone group and a fine oilstone group according to the oilstone installed, an oil cylinder which is connected with the hydraulic cylinder through an oil circuit is arranged in the main body, a piston is arranged in the oil cylinder, a push rod which drives the piston to push out and suck back the hydraulic oil in the oil cylinder is arranged in the main body, the oil circuit is connected with the buffer cylinder through a buffer tube, and a control valve is assembled on the buffer tube.

[0007] As a further solution of the utility model: an oil distribution pipe is arranged inside the main body, a coarse grinding and expansion oil circuit connected with the coarse oil stone group is arranged on the oil distribution pipe, a coarse grinding and expansion oil valve is installed on the coarse grinding and expansion oil circuit, a fine grinding and expansion oil circuit connected with the fine oil stone group is arranged on the oil distribution pipe, and a fine grinding and expansion oil valve is installed on the fine grinding and expansion oil circuit.

[0008] As a further solution of the utility model: a clamping groove is arranged on the oilstone seat, and the clamping groove is provided with a spring member which can pull the oilstone seat inward.

[0009] As a further solution of the utility model: the buffer cylinder is filled with a part of gas and the other part is hydraulic oil. The hydraulic oil in the hydraulic cylinder enters the buffer cylinder from the buffer pipe through the oil circuit.

[0010] As a further solution of the utility model: the hydraulic oil and the gas in the buffer cylinder are separated by a diaphragm, and the diaphragm and the inner wall of the buffer cylinder are fixed to each other.

[0011] As a further solution of the utility model: the oil cylinder is connected with the oil distribution pipe through the main oil pipe, the push rod pushes the hydraulic oil from the main oil pipe into the oil distribution pipe and the hydraulic cylinder by pushing the piston, and the push rod draws the hydraulic oil from the hydraulic cylinder and the oil distribution pipe back to the oil cylinder by pulling back the piston.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The rigid honing head is provided with a buffer cylinder so that when the force on the oilstone exceeds a limited range, the oil can flow back to the compressed gas and reset when the force is restored, thereby forming flexible honing and protecting the oilstone from damage due to excessive force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram of the oil system of a rigid honing head;

[0015] Figure 2 It is a structural schematic diagram of a rigid honing head.

[0016] In the figure: 1. main body; 2. oilstone seat; 3. hydraulic cylinder; 4. push rod; 5. piston; 6. oil cylinder; 7. main oil pipe; 8. oil distribution pipe; 9. buffer pipe; 10. control valve; 11. rough grinding and expansion of oil circuit; 12. rough grinding and expansion of oil valve; 13. rough grinding and expansion of oil valve; 14. buffer cylinder; 15. fine oilstone group; 16. fine grinding and expansion of oil circuit; 17. coarse oilstone group. DETAILED DESCRIPTION

[0017] See also Figures 1-2In the embodiment of the utility model, a rigid honing head includes a body 1, an oil stone seat 2 which can be expanded outward in parallel is arranged on the body 1, a hydraulic cylinder 3 which can push out the oil stone seat 2 horizontally is arranged inside the body 1, the oil stone seat 2 is divided into a coarse oil stone group 17 and a fine oil stone group 15 according to the installed oil stone, an oil cylinder 6 which is connected with the hydraulic cylinder 3 through an oil circuit is arranged in the body 1, a piston 5 is arranged in the oil cylinder 6, a push rod 4 which drives the piston 5 to push out and suck back the hydraulic oil in the oil cylinder 6 is installed in the body 1, the oil circuit is connected with the buffer cylinder 14 through a buffer tube 9, a control valve 10 is installed on the buffer tube 9, and a groove limit slide is provided between the oil stone seat 2 and the body 1 The hydraulic cylinders 3 are movable, limiting the parallel outward opening trajectory of the oilstone seat 2. Two hydraulic cylinders 3 are grouped together to push the oilstone seat 2 to expand for honing. Conventional oilstones are in a fixed state when expanded, and the oilstone has no space to move, which causes damage or jamming of the oilstone. In order to improve the smoothness during honing, a buffer tube 9 and a buffer cylinder 14 are added to the oil circuit. When encountering a large pressure, the hydraulic oil enters the buffer cylinder 14. When the pressure is restored, the hydraulic oil in the buffer cylinder 14 returns to the hydraulic cylinder 3 to support the oilstone seat 2 to continue operating. After the honing is stable, the control valve 10 is closed to increase its rigidity for further honing processing, which can effectively avoid the risk of damage or jamming of the oilstone.

[0018] In a preferred embodiment, an oil distribution pipe 8 is provided inside the main body 1, and a rough grinding expansion oil circuit 11 connected to the coarse oilstone group 17 is provided on the oil distribution pipe 8, and a rough grinding expansion oil valve 12 is installed on the rough grinding expansion oil circuit 11, and a fine grinding expansion oil circuit 16 connected to the fine oilstone group 15 is provided on the oil distribution pipe 8, and a fine grinding expansion oil valve 13 is installed on the fine grinding expansion oil circuit 16. The fine grinding expansion oil valve 13 and the rough grinding expansion oil valve 12 are used to control the fine honing process and the rough honing process. The control valve 10, the fine grinding expansion oil valve 13 and the rough grinding expansion oil valve 12 adopt micro solenoid valves, and the internal space of the honing head is reasonably arranged to keep the balance of the honing head as much as possible. The control valve 10, the fine grinding expansion oil valve 13 and the rough grinding expansion oil valve 12 are controlled by the machine tool CNC system.

[0019] In a preferred embodiment, a slot is provided on the oilstone seat 2, and a spring member is provided in the slot to pull the oilstone seat 2 inward. The purpose of the spring member is to help the oilstone seat 2 reset, accelerate and ensure the retracted working state of the oilstone seat 2.

[0020] In a preferred embodiment, the buffer cylinder 14 is filled with a portion of gas and the other portion of hydraulic oil. The hydraulic oil in the hydraulic cylinder 3 enters the buffer cylinder 14 from the buffer tube 9 through the oil circuit. The hydraulic oil is liquid and incompressible, but the gas is compressible. Therefore, by utilizing the compressible property of the gas, when the oilstone is subjected to a large force, the oil can flow back by compressing the gas in the buffer cylinder 14. When the force is restored, the gas pushes the hydraulic oil back to the hydraulic cylinder 3, forming flexible honing and protecting the oilstone from damage due to excessive force.

[0021] In a preferred embodiment, the hydraulic oil and gas in the buffer cylinder 14 are separated by a diaphragm, and the diaphragm and the inner wall of the buffer cylinder 14 are fixed to each other. When the honing head is in operation, it is in a rotating state, so the internal hydraulic oil may be mixed with the gas due to centrifugal force, causing the gas to enter the oil circuit. Therefore, they are separated by the diaphragm to avoid the occurrence of this phenomenon.

[0022] In a preferred embodiment, the oil cylinder 6 is connected to the oil distribution pipe 8 through the main oil pipe 7, and the push rod 4 pushes the hydraulic oil from the main oil pipe 7 into the oil distribution pipe 8 and the hydraulic cylinder 3 by pushing the piston 5. The push rod 4 draws the hydraulic oil from the hydraulic cylinder 3 and the oil distribution pipe 8 back to the oil cylinder 6 by pulling back the piston 5. The push rod 4 is driven. There are generally two driving methods. One is to use an electric push rod with a stepper motor as the driving element. The main body 1 and the machine tool spindle are fixed with brush rings to provide electrical energy and transmit electrical signals. The other is to use the inner shaft drive of the double-feed honing, replace the push rod 4 with a screw structure that is the same as the conventional honing head adjustment pin, and push out the hydraulic oil through rotation drive.

[0023] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0024] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A rigid honing head, comprising a main body (1), the main body (1) being provided with an oilstone seat (2) capable of expanding outward in parallel, the main body (1) being provided with a hydraulic cylinder (3) capable of pushing the oilstone seat (2) out horizontally, the oilstone seat (2) being divided into a coarse oilstone group (17) and a fine oilstone group (15) according to the oilstones installed therein, It is characterized in that The body (1) is provided with an oil cylinder (6) which is connected to the hydraulic cylinder (3) through an oil circuit, a piston (5) is provided in the oil cylinder (6), a push rod (4) which drives the piston (5) to push out and suck back the hydraulic oil in the oil cylinder (6) is installed in the body (1), the oil circuit is connected to the buffer cylinder (14) through a buffer tube (9), and a control valve (10) is installed on the buffer tube (9).

2. A rigid honing head according to claim 1, It is characterized in that An oil distribution pipe (8) is provided inside the body (1), a coarse grinding expansion oil path (11) connected to a coarse oilstone group (17) is provided on the oil distribution pipe (8), a coarse grinding expansion oil valve (12) is installed on the coarse grinding expansion oil path (11), a fine grinding expansion oil path (16) connected to a fine oilstone group (15) is provided on the oil distribution pipe (8), and a fine grinding expansion oil valve (13) is installed on the fine grinding expansion oil path (16).

3. A rigid honing head according to claim 1, It is characterized in that The oil stone seat (2) is provided with a clamping groove, and the clamping groove is provided with a spring member that pulls the oil stone seat (2) inward.

4. A rigid honing head according to claim 1, It is characterized in that The buffer cylinder (14) is filled with a portion of gas and another portion of hydraulic oil. The hydraulic oil in the hydraulic cylinder (3) enters the buffer cylinder (14) from the buffer pipe (9) through the oil path.

5. A rigid honing head according to claim 4, It is characterized in that The hydraulic oil and gas in the buffer cylinder (14) are separated by a diaphragm, and the diaphragm and the inner wall of the buffer cylinder (14) are fixed to each other.

6. A rigid honing head according to claim 1, It is characterized in that The oil cylinder (6) is connected to the oil distribution pipe (8) via the main oil pipe (7); the push rod (4) pushes the piston (5) to push the hydraulic oil from the main oil pipe (7) into the oil distribution pipe (8) and the hydraulic cylinder (3); the push rod (4) draws the hydraulic oil from the hydraulic cylinder (3) and the oil distribution pipe (8) back to the oil cylinder (6) by pulling back the piston (5).

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