Machining device capable of correcting cylindricity of workpiece in deep hole honing machining

Abstract

The machining device comprises a main transmission mechanism, a feeding mechanism and a connecting rod mechanism, the feeding mechanism is arranged on the upper portion of the main transmission mechanism, the connecting rod mechanism is arranged on the lower portion of the main transmission mechanism, a main shaft rotates through transmission of a main transmission chain wheel, and a push rod in the main shaft is combined with a push rod of the feeding mechanism. When the servo motor in the feeding mechanism starts to work, a push rod in the feeding mechanism is driven to rotate, a push rod in the main shaft mechanism is driven to rotate, a push rod in the connecting rod is made to rotate, and a push rod in the upper portion of the connecting rod is made to rotate. Through transmission of a thread pair, the lower push rod in the connecting rod is pressed, the lower push rod is not prone to deformation, stable cutting force cutting can be guaranteed, fixed-size honing can be achieved through servo feeding, grinding of any position of a machined workpiece can be achieved, and it is guaranteed that the cylindricity of the machined workpiece is qualified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of honing processing, in particular to a processing device for correcting the cylindricity of a workpiece in deep hole honing processing. BACKGROUND

[0002] With the development of technology and market demand for long-length-ratio inner hole parts (deep hole, hole depth can reach 3 meters), honing process is needed to ensure the cylindricity, cylindricity and surface finish of the inner hole.

[0003] Before the honing process, the cylindricity of the workpiece cannot be guaranteed due to tool setting. The traditional honing process feeding mode is double hydraulic feeding mechanism. Since the hydraulic feeding is constant pressure control, and due to the honing hole depth of the workpiece, the push rod is prone to deformation, and the cutting force cannot be stably output. The workpiece with poor pre-process cylindricity cannot correct the cylindricity of the workpiece.

[0004] The existing patent application (CN108115545A) discloses a deep hole honing connecting rod, which is connected between the machine tool working head and the honing tool, and is used for lengthening the processable depth of the honing tool. The honing connecting rod comprises a rod body, one end of the rod body is connected with the honing tool, the honing connecting rod further comprises a fixed rod connected with the other end of the rod body, a butt joint mechanism for movably connecting the fixed rod and the rod body, and a sliding top push rod arranged in the inner circumferences of the fixed rod and the rod body. During processing, when the honing tool is subjected to radial force, the rod body deflects relative to the fixed rod at the butt joint mechanism. The deep hole honing connecting rod is composed of two rods. The fixed rod and the rod body are connected through the butt joint of the butt joint mechanism of the present application. When the honing tool is used for reaming a deep hole and encounters radial force, the rod body can deflect relative to the fixed rod due to the arrangement of the butt joint mechanism, that is, the honing tool connected to the rod body can slightly deflect and smoothly enter the hole for reaming. In the honing processing of deep hole parts, the push rod is a slender rod which is prone to deformation under pressure, so that the cutting force in the honing processing cannot be stably output, and the cylindricity of the workpiece cannot be guaranteed.

[0005] Therefore, there is a need for a processing device for correcting the cylindricity of a workpiece in deep hole honing processing. SUMMARY

[0006] In order to solve the problem that the honing process of deep hole parts cannot guarantee the cylindricity of the workpiece, the present application provides a processing device for correcting the cylindricity of a workpiece in deep hole honing processing, which can realize the grinding of any position of the processed workpiece and guarantee the cylindricity of the processed workpiece.

[0007] The application provides a processing device for correcting workpiece cylindricity in deep hole honing processing, comprising a feeding mechanism, a main transmission mechanism and a connecting rod mechanism; the feeding mechanism is arranged on the upper part of the main transmission mechanism, and the connecting rod mechanism is arranged on the lower part of the main transmission mechanism; the feeding mechanism comprises a servo motor, an electric slip ring, a hydraulic slip ring and a first feeding push rod which are sequentially connected; the main transmission mechanism comprises a main shaft box, a main transmission chain wheel, a main shaft and a second feeding push rod which are sequentially connected; and the connecting rod mechanism comprises a connecting rod, an upper push rod, a threaded pair and a lower push rod which are sequentially connected.

[0008] As a preferred mode, the main shaft is rotated through the main transmission chain wheel transmission, the second feeding push rod is combined with the first feeding push rod, the second feeding push rod and the first feeding push rod rotate as a whole with the main shaft, the connecting rod rotates at the same speed with the main shaft, and the servo motor rotates at the same speed with the main shaft.

[0009] As a preferred mode, the feeding mechanism is a servo hydraulic double feeding mechanism, the feeding mechanism rotates with the main shaft, the electric signal and power of the servo motor are outputted through the electric slip ring, the hydraulic pressure is outputted through the hydraulic slip ring, and the electric signal and power and the hydraulic pressure rotate with the main shaft by 360 degrees without limitation.

[0010] As a preferred mode, the upper push rod mainly bears the rotating torque, the rotating torque is converted into the up-down movement of the lower push rod through the threaded pair, and the lower push rod is short and is not easy to deform under pressure, so that the stable cutting force can be ensured.

[0011] In the use process of the processing device for correcting workpiece cylindricity in deep hole honing processing, when the servo motor starts to work, the first feeding push rod is driven to rotate, the second feeding push rod is driven to rotate, the upper push rod is driven to rotate, the lower push rod is pressed through the threaded pair transmission, the lower push rod is not easy to deform, and the stable cutting force can be ensured for cutting, the servo feeding can realize the size honing, the grinding of the workpiece at any position can be realized, and the cylindricity of the workpiece can be ensured to be qualified.

[0012] The application has the following advantages:

[0013] 1. In deep hole honing processing, the device can ensure the cylindricity of the processed hole.

[0014] 2. In deep hole honing processing, the push rod structure is changed from an elongated rod mainly bearing pressure and easy to deform to an upper and lower two-part push rod, the upper elongated rod bears the rotating torque, the torque is converted into pressure acting on the lower push rod through the threaded pair, and the lower push rod is a short rod structure and is not easy to deform.

[0015] 3. The feed mechanism can rotate with the spindle, and the application of electric and hydraulic slip rings simplifies the structure. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the feed mechanism structure of a machining device for correcting the cylindricity of a workpiece in deep hole honing according to the present invention.

[0017] Fig. 2 This is a schematic diagram of the main transmission mechanism of a machining device for correcting the cylindricity of a workpiece in deep hole honing according to the present invention.

[0018] Fig. 3 This is a schematic diagram of the linkage mechanism of a machining device for correcting the cylindricity of a workpiece in deep hole honing according to the present invention.

[0019] Reference numerals: 1. Feed mechanism; 11. Servo motor; 12. Electric slip ring; 13. Hydraulic slip ring; 14. First feed push rod; 2. Main drive mechanism; 21. Spindle box; 22. Main drive sprocket; 23. Spindle; 24. Second feed push rod; 3. Linkage mechanism; 31. Connecting rod; 32. Upper push rod; 33. Threaded pair; 34. Lower push rod. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1

[0022] like Figs. 1-3 As shown, a machining device for correcting the cylindricity of a workpiece in deep hole honing includes a feed mechanism 1, a main drive mechanism 2, and a linkage mechanism 3. The feed mechanism 1 is located on the upper part of the main drive mechanism 2, and the linkage mechanism 3 is located on the lower part of the main drive mechanism 2. The feed mechanism 1 includes a servo motor 11, an electric slip ring 12, a hydraulic slip ring 13, and a first feed push rod 14 connected in sequence. The main drive mechanism 22 includes a spindle box 21, a main drive sprocket 22, a spindle 23, and a second feed push rod 24 connected in sequence. The linkage mechanism 3 includes a connecting rod 31, an upper push rod 32, a threaded pair 33, and a lower push rod 34 connected in sequence.

[0023] The main shaft 23 rotates through the main drive sprocket 22. The second feed push rod 24 is combined with the first feed push rod 14. The second feed push rod 24 and the first feed push rod 14 rotate together with the main shaft 23. The connecting rod 31 rotates with the main shaft 23 at the same speed. The servo motor 11 rotates with the main shaft 23 at the same speed.

[0024] The feed mechanism 1 is a servo-hydraulic dual feed mechanism. The feed mechanism 1 rotates with the spindle 23. The electrical signal and power of the servo motor 11 are output through the electric slip ring 12 so that the electrical signal and power can be output without restriction as the spindle rotates 360 degrees. The hydraulic oil can be output through the hydraulic slip ring 13 so that the hydraulic pressure can be output without restriction as the spindle rotates 360 degrees.

[0025] The upper push rod 32 mainly bears the rotational torque, which is converted into the up and down movement of the lower push rod 34 through the threaded pair 33. The lower push rod 34 is relatively short and is not easily deformed when subjected to pressure, which can ensure the stable output of cutting force.

[0026] The usage method of this embodiment is as follows: When the servo motor 11 starts working, it drives the first feed push rod 14 to rotate, which in turn drives the second feed push rod 24 to rotate, causing the upper push rod 32 to rotate. Through the threaded pair 33, the lower push rod 34 is subjected to pressure. The lower push rod 34 is not easily deformed, which can ensure stable cutting force. The servo feed can realize fixed-size honing and can realize grinding at any position of the workpiece, ensuring that the cylindricity of the workpiece is qualified.

[0027] The above description is illustrative only and not restrictive of the present invention. Those skilled in the art will understand that any modifications, variations or equivalents that can be made without departing from the spirit and scope defined by the claims will fall within the protection scope of the present invention.

Claims

1. A machining apparatus for correcting the cylindricity of a workpiece during deep hole honing, characterized in that: It includes a feeding mechanism (1), a main drive mechanism (2), and a linkage mechanism (3); the feeding mechanism (1) is located on the upper part of the main drive mechanism (2), and the linkage mechanism (3) is located on the lower part of the main drive mechanism (2); The feeding mechanism (1) includes a servo motor (11), an electric slip ring (12), a hydraulic slip ring (13), and a first feed push rod (14) connected in sequence; The main drive mechanism (2) includes a main spindle box (21), a main drive sprocket (22), a main shaft (23), and a second feed push rod (24) connected in sequence; The linkage mechanism (3) includes a connecting rod (31), an upper push rod (32), a threaded pair (33), and a lower push rod (34) connected in sequence.

2. The machining apparatus for correcting the cylindricity of a workpiece in deep hole honing according to claim 1, characterized in that: The main shaft (23) rotates through the main drive sprocket (22). The second feed push rod (24) is connected to the first feed push rod (14). The second feed push rod (24) and the first feed push rod (14) rotate together with the main shaft (23). The connecting rod (31) rotates at the same speed as the main shaft (23). The servo motor (11) rotates at the same speed as the main shaft (23).

3. The machining apparatus for correcting the cylindricity of a workpiece in deep hole honing according to claim 1, characterized in that: The feeding mechanism (1) is a servo hydraulic dual feeding mechanism. The feeding mechanism (1) rotates with the spindle (23). The electrical signal and power of the servo motor (11) are output through the electric slip ring (12) so that the electrical signal and power can be output without restriction as the spindle (23) rotates 360 degrees. The hydraulic oil can be output through the hydraulic slip ring (13) so that the hydraulic pressure can be output without restriction as the spindle (23) rotates 360 degrees.

4. The machining apparatus for correcting the cylindricity of a workpiece in deep hole honing according to claim 1, characterized in that: The upper push rod (32) bears the rotational torque, which is converted into the up and down movement of the lower push rod (34) through the threaded pair (33). The lower push rod (34) is shorter than the upper push rod (32).

5. The machining apparatus for correcting the cylindricity of a workpiece in deep hole honing according to claim 1, characterized in that: When the servo motor (11) starts working, it drives the first feed push rod (14) to rotate, which in turn drives the second feed push rod (24) to rotate, causing the upper push rod (32) to rotate. Through the threaded pair (33), the lower push rod (34) is subjected to pressure, and the lower push rod (34) does not deform.

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