Automatic honing device for cylinder barrel

Abstract

The invention provides an automatic honing device for a cylinder barrel, and belongs to the technical field of cylinder barrel machining, the automatic honing device comprises a machine tool, a three-jaw chuck and a honing head, the three-jaw chuck and the honing head are arranged in the machine tool, and the three-jaw chuck and the honing head are coaxially arranged; a supporting frame is arranged on the machine tool, two clamping frames which are symmetrically arranged left and right are transversely connected to the supporting frame in a sliding mode, V-shaped grooves used for abutting against a cylinder barrel are formed in the bottoms of the two clamping frames, and inflection points of the two V-shaped grooves and a center shaft of the three-jaw chuck are located on the same vertical plane. The supporting frame is provided with a driving piece used for driving the two clamping frames to be close to each other in the opposite direction or away from each other in the back-to-back direction. Pressing plates capable of abutting against the upper end face of the cylinder barrel are vertically and slidably connected to the clamping frames through elastic pieces, and linkage pieces are arranged between the supporting frame and the pressing plates and used for enabling the pressing plates to move downwards and abut against the upper end face of the cylinder barrel when the two clamping frames get close to each other oppositely. According to the honing device, the possibility that the cylinder barrel inclines or deforms in the honing process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cylinder barrel processing, and in particular to an automatic honing device for a cylinder barrel. Background Art

[0002] The cylinder barrel is the main body of the hydraulic cylinder, mainly used to accommodate the piston, and also needs to withstand high pressure and high temperature environments, so its processing accuracy, surface finish and material strength are very critical. In the processing of the cylinder barrel, boring, reaming and honing are often used to precisely process its inner hole to ensure its good performance in the engine or other mechanical equipment.

[0003] Among them, honing the cylinder is to improve the smoothness of the inner wall of the cylinder, reduce the surface roughness of the inner wall of the cylinder, help reduce friction, and at the same time improve the sealing between the piston and the cylinder, thereby enhancing the use effect of the hydraulic cylinder.

[0004] Referring to the Chinese patent document with announcement number CN110640616B and announcement date March 30, 2021, the name is a cylinder honing machine with workpiece cleaning function. It can adjust the distance between the two fixed frames through the cooperation of the hydraulic telescopic rod, and then complete the clamping and positioning of cylinders of different sizes by clamping and fixing the two fixed frames.

[0005] Referring to the above technical solution, when the cylinder is processed by vertical honing, the honing head is often set above the cylinder, and in order to provide sufficient operating space for the honing work, the clamping and positioning of the cylinder usually needs to be performed at the bottom of the cylinder. In this case, when honing a cylinder with a long axial dimension, when the top of the cylinder is subjected to pressure or vibration applied by the honing head, the cylinder may tilt or deform, causing the honing head to fail to process the inner wall of the cylinder according to the original path, thereby affecting the final quality of the cylinder. Summary of the invention

[0006] In view of this, the present application provides an automated honing device for a cylinder barrel, which is mainly used to solve the problem that the cylinder barrel may tilt or deform during the honing process, thereby affecting the final honing quality.

[0007] In order to solve the above-mentioned technical problems, the present application provides an automatic honing device for a cylinder barrel, comprising a machine tool and a three-jaw chuck and a honing head arranged inside the machine tool, and the three-jaw chuck and the honing head are coaxially arranged; a support frame is arranged on the machine tool, and two clamping frames arranged symmetrically on the left and right are laterally slidably connected to the support frame, and the bottoms of the two clamping frames are provided with V-shaped grooves for abutting the cylinder barrel, and the inflection points of the two V-shaped grooves are in the same vertical plane as the center axis of the three-jaw chuck, and the support frame is provided with a driving member for driving the two clamping frames to approach each other or move away from each other; the clamping frames are vertically slidably connected with a holding plate capable of abutting the upper end surface of the cylinder barrel through an elastic member, and a linkage member is arranged between the support frame and the holding plate, which is used to cause the holding plate to move downward and abut the upper end surface of the cylinder barrel when the two clamping frames approach each other.

[0008] By adopting the above technical solution, the two V-grooves and the three-jaw chuck can cooperate to center and clamp the cylinder from the upper and lower ends, reducing the possibility of tilting or deformation of the cylinder during the honing process. At the same time, the holding plate can press and fix the cylinder, further improving the stability of the cylinder during the honing process.

[0009] Optionally, the support frame is detachably connected to the machine tool by bolt connection, and the height of the support frame can be adjusted according to the change of the bolt connection point.

[0010] By adopting the above technical solution, when the height of the support frame changes, the use requirements of cylinders with different axial sizes can be met.

[0011] Optionally, the holding plates are each provided with an arc-shaped baffle plate for preventing honing waste chips from splashing, and flexible rubber strips are each provided at the connecting edges of the two arc-shaped baffle plates.

[0012] By adopting the above technical solution, the two arc-shaped baffles can form a protective cover above the cylinder barrel to prevent the honing fluid or honing waste chips from splashing during processing.

[0013] Optionally, the driving member includes a bidirectional screw rod rotatably connected to the support frame, and both ends of the bidirectional screw rod are respectively threadedly connected to the two clamping frames, and a servo motor for driving the bidirectional screw rod to rotate is provided on the support frame.

[0014] By adopting the above technical solution, when the servo motor drives the bidirectional screw rod to rotate, the two clamping frames can move synchronously.

[0015] Optionally, the linkage member includes pressure-bearing slopes arranged on two holding plates, and the pressure-bearing slopes are arranged to be inclined downward from the outside to the inside, and the support frame is provided with a plurality of pressure rods that can correspond to and abut against the pressure-bearing slopes one by one.

[0016] By adopting the above technical solution, when the two clamping frames approach each other, the pressure rod will abut against the pressure-bearing slope and force the holding plate to move downward, so that the holding plate abuts against the upper end surface of the cylinder.

[0017] Optionally, a roller is provided at the bottom end of the pressure rod, and the roller is used to contact the pressure slope surface instead of the pressure rod.

[0018] By adopting the above technical solution, the friction resistance between the pressure rod and the pressure-bearing slope surface can be reduced.

[0019] Optionally, an auxiliary centering component is provided on the clamping frame for auxiliary centering of the honing head and the cylinder barrel.

[0020] Optionally, the auxiliary centering assembly includes two V-shaped plates arranged on the top of the two clamping frames, each V-shaped plate is slidably connected to two ball pins, the ball head part of the ball pin is arranged on the pin body part of the ball pin in a ball joint manner and can abut against the main shaft of the honing head, and the V-shaped plate is rotatably connected to a plurality of threaded pins that correspond one-to-one to the ball pins and are used to drive the axial displacement of the ball pins.

[0021] By adopting the above technical solution, the ball pin can perform interference centering on the main shaft of the honing head, thereby improving the stability of cylinder processing and reducing the probability of the honing head tilting due to excessive torque during rotation.

[0022] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. The combination of double-end clamping and vertical pressing can effectively position the cylinder barrel, and at the same time, it can center the cylinder barrel at both ends, so that the central axis of the cylinder barrel and the honing head are in a coincident state, reducing the possibility of the cylinder barrel tilting or deforming and affecting the final quality of the cylinder barrel.

[0023] 2. After the positioning and clamping of the cylinder barrel is completed, a protective cover can be formed above the cylinder barrel to prevent the honing fluid or honing waste chips from splashing during processing. It can not only allow the delivered honing fluid to completely enter the interior of the cylinder barrel to achieve good cooling and flushing effects, but also reduce the possibility of the honing fluid or honing waste chips adhering to the outer surface of the cylinder barrel and interfering with the clamping work.

[0024] 3. After the clamping work of the cylinder is completed, the main shaft of the honing head can be centered by resistance. While improving the stability of the cylinder processing, it reduces the probability of the honing head tilting due to excessive torque during rotation, making the movement trajectory of the honing head in the cylinder more precise, thereby improving the final quality of the honing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an automatic honing device for a cylinder barrel in the present application; Figure 2 This is a schematic diagram of the structure of the support frame and the clamping frame of this application; Figure 3 This is a schematic diagram of the structure of the clamping frame of this application; Figure 4 For this application Figure 2 A partial enlarged view of area A in the middle.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Machine tool; 11. Three-jaw chuck; 12. Honing head; 2. Support frame; 21. Clamping frame; 22. V-shaped groove; 23. Driving member; 231. Bidirectional screw; 232. Servo motor; 3. Holding plate; 31. Elastic member; 32. Linkage member; 321. Pressure slope; 322. Pressure rod; 323. Roller; 4. Arc baffle; 41. Flexible rubber strip; 5. Auxiliary centering assembly; 51. V-shaped plate; 52. Ball pin; 53. Threaded pin. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 4 , the technical scheme of the embodiment of the present application is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0028] Reference Figure 1 and Figure 2 This embodiment provides an automatic honing device for a cylinder, comprising a machine tool 1, a three-jaw chuck 11, a honing head 12, a centering clamping assembly, and a pressing and positioning assembly. The three-jaw chuck 11 and the honing head 12 are both arranged inside the machine tool 1, and the three-jaw chuck 11 and the honing head 12 are coaxially arranged, and the honing head 12 can perform honing work under the drive of the built-in drive system of the cylinder.

[0029] Among them, refer to Figure 2 and Figure 3The centering clamping assembly includes a support frame 2, two clamping frames 21, a V-shaped groove 22 and a driving member 23. The support frame 2 is arranged on the machine tool 1, and the two clamping frames 21 are both slidably connected to the support frame 2 in a transverse manner and are arranged symmetrically with each other. Two V-shaped grooves 22 are provided and are respectively opened at the bottom of the two clamping frames 21, and the turning points of the two V-shaped grooves 22 are in the same vertical plane as the central axis of the three-jaw chuck 11; the driving member 23 includes a bidirectional screw rod 231 and a servo motor 232, the bidirectional screw rod 231 is rotatably connected to the support frame 2, and the two ends of the bidirectional screw rod 231 are respectively threadedly connected to the two clamping frames 21, and the servo motor 232 is arranged on the support frame 2. When the servo motor 232 runs and drives the bidirectional screw rod 231 to rotate, the two clamping frames 21 can be moved closer to each other or away from each other.

[0030] After the three-jaw chuck 11 performs preliminary centering clamping on the cylinder, the two clamping frames 21 are moved toward each other through the cooperation of the driving member 23 until the top of the cylinder is clamped and fixed between the two V-grooves 22, thereby achieving double-end fixation of the cylinder. At the same time, the central axes of the cylinder and the honing head 12 can be made to coincide, reducing the possibility of the cylinder being tilted or deformed and affecting the final quality of the cylinder.

[0031] Among them, refer to Figure 2 , Figure 3 and Figure 4 The holding and positioning assembly includes a holding plate 3, an elastic member 31 and a linkage member 32. Two holding plates 3 are provided and are vertically slidably connected to the clamping frame 21 through the elastic member 31; the linkage member 32 includes a plurality of pressure-bearing slopes 321 and a plurality of pressure-applying rods 322. The pressure-bearing slopes 321 are respectively provided on the two holding plates 3, and the pressure-bearing slopes 321 are all inclined downward from the outside to the inside, and the pressure-applying rods 322 are all provided on the support frame 2 and correspond to and abut against the pressure-bearing slopes 321 one by one.

[0032] When the two clamping frames 21 approach each other, the pressure rod 322 will abut against the pressure slope 321 and cause the holding plate 3 to move downward until the holding plate 3 abuts against the upper end surface of the cylinder, thereby achieving the pressing and positioning of the cylinder and further improving the stability of the cylinder during the honing process.

[0033] In addition, refer to Figure 4 A roller 323 is provided at the bottom end of the pressure rod 322. The roller 323 is used to replace the pressure rod 322 to contact the pressure slope 321, which can reduce the friction resistance between the pressure rod 322 and the pressure slope 321.

[0034] Reference Figure 1 and Figure 2 The support frame 2 is detachably connected to the machine tool 1 by bolt connection, and the height of the support frame 2 can be adjusted according to the change of the bolt connection point.

[0035] When the height of the support frame 2 changes, it can meet the use requirements of cylinders with different axial sizes.

[0036] Reference Figure 2 and Figure 3 The holding plate 3 is provided with an arc-shaped baffle plate 4 for preventing honing waste chips from splashing, and the connecting edges of the two arc-shaped baffle plates 4 are provided with a flexible rubber strip 41.

[0037] After the two clamping frames 21 complete the clamping of the cylinder, the two arc-shaped baffles 4 can form a protective cover above the cylinder to prevent the honing fluid or honing waste chips from splashing during processing, so as to prevent the honing fluid or honing waste chips from adhering to the outer surface of the cylinder and interfering with the clamping work. The flexible rubber strip 41 can play a certain degree of sealing role on the connecting edges of the two arc-shaped baffles 4.

[0038] Reference Figure 2 and Figure 3 , an auxiliary centering assembly 5 is provided on the clamping frame 21, which is used for auxiliary centering of the honing head 12 and the cylinder. The auxiliary centering assembly 5 includes two V-shaped plates 51, four ball pins 52 and four threaded pins 53. The two V-shaped plates 51 are respectively arranged on the top of the two clamping frames 21, and two ball pins 52 are slidably connected to each V-shaped plate 51. The ball head part of the ball pin 52 is arranged on the pin body part of the ball pin 52 in a ball joint manner and can abut against the main shaft of the honing head 12. Each V-shaped plate 51 is rotatably connected with two threaded pins 53 that correspond to the ball pin 52 one by one and are used to drive the axial displacement of the ball pin 52.

[0039] After the clamping work of the cylinder is completed, the personnel can use the threaded pin 53 to make the ball pin 52 axially displaced until the ball head part of the ball pin 52 abuts against the main shaft of the honing head 12, so as to provide support for the main shaft of the honing head 12 in the subsequent honing process, reduce the probability of the honing head 12 tilting due to excessive torque during rotation, and further improve the stability of the honing work.

[0040] The implementation principle of an automatic honing device for a cylinder barrel in the embodiment of the present application is as follows: After the three-jaw chuck 11 performs preliminary centering clamping on the cylinder, the two clamping frames 21 are moved toward each other through the cooperation of the driving member 23 until the top of the cylinder is clamped and fixed between the two V-grooves 22, thereby achieving double-end fixation of the cylinder. At the same time, the central axes of the cylinder and the honing head 12 can be made to coincide, reducing the possibility of the cylinder being tilted or deformed and affecting the final quality of the cylinder.

[0041] When the two clamping frames 21 approach each other, the pressure rod 322 will abut against the pressure slope 321 and cause the holding plate 3 to move downward until the holding plate 3 abuts against the upper end surface of the cylinder, thereby achieving the pressing and positioning of the cylinder and further improving the stability of the cylinder during the honing process.

[0042] After the two clamping frames 21 complete the clamping of the cylinder, the two arc-shaped baffles 4 can form a protective cover above the cylinder to prevent the honing fluid or honing waste chips from splashing during processing, so as to prevent the honing fluid or honing waste chips from adhering to the outer surface of the cylinder and interfering with the clamping work. The flexible rubber strip 41 can play a certain degree of sealing role on the connecting edges of the two arc-shaped baffles 4.

[0043] In addition, after the clamping work of the cylinder is completed, the personnel can use the threaded pin 53 to cause the ball pin 52 to undergo axial displacement until the ball head part of the ball pin 52 abuts against the main shaft of the honing head 12, so as to provide support for the main shaft of the honing head 12 during the subsequent honing process, reduce the probability of the honing head 12 tilting due to excessive torque during rotation, and further improve the stability of the honing work.

[0044] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An automated honing device for a cylinder, comprising a machine tool (1) and a three-jaw chuck (11) and a honing head (12) arranged therein, wherein the three-jaw chuck (11) and the honing head (12) are coaxially arranged, characterized in that: The machine tool (1) is provided with a support frame (2), and two clamping frames (21) are symmetrically arranged on the support frame (2) and are slidably connected to the support frame (2). The bottoms of the two clamping frames (21) are provided with V-shaped grooves (22) for abutting against the cylinder barrel, and the turning points of the two V-shaped grooves (22) are located on the same vertical plane as the central axis of the three-jaw chuck (11). The support frame (2) is provided with a driving member (23) for driving the two clamping frames (21) to move toward each other or away from each other. A holding plate (3) capable of abutting against the upper end surface of the cylinder is vertically slidably connected to the clamping frame (21) via an elastic member (31), and a linkage member (32) is provided between the support frame (2) and the holding plate (3) for causing the holding plate (3) to move downward and abut against the upper end surface of the cylinder when the two clamping frames (21) approach each other.

2. The automatic honing device for a cylinder according to claim 1, characterized in that: The support frame (2) is detachably connected to the machine tool (1) by means of bolt connection, and the height of the support frame (2) can be adjusted according to changes in the bolt connection points.

3. The automatic honing device for a cylinder according to claim 1, characterized in that: The holding plates (3) are each provided with an arc-shaped baffle plate (4) for preventing honing waste chips from splashing, and flexible rubber strips (41) are each provided at the connecting edges of the two arc-shaped baffle plates (4).

4. The automatic honing device for a cylinder according to claim 1, characterized in that: The driving member (23) comprises a bidirectional screw rod (231) rotatably connected to the support frame (2), and two ends of the bidirectional screw rod (231) are respectively threadedly connected to the two clamping frames (21), and a servo motor (232) is provided on the support frame (2) for driving the bidirectional screw rod (231) to rotate.

5. The automatic honing device for a cylinder according to claim 1, characterized in that: The linkage member (32) comprises pressure-bearing slopes (321) arranged on two holding plates (3), and the pressure-bearing slopes (321) are arranged to be inclined downward from the outside to the inside, and the support frame (2) is provided with a plurality of pressure rods (322) that can correspond to and abut against the pressure-bearing slopes (321) one by one.

6. The automatic honing device for a cylinder according to claim 5, characterized in that: The bottom end of the pressure rod (322) is provided with a roller (323), and the roller (323) is used to replace the pressure rod (322) to contact the pressure slope (321).

7. The automatic honing device for a cylinder according to claim 1, characterized in that: An auxiliary centering component (5) is provided on the clamping frame (21) for auxiliary centering of the honing head (12) and the cylinder barrel.

8. The automatic honing device for a cylinder according to claim 7, characterized in that: The auxiliary centering assembly (5) comprises a V-shaped plate (51) arranged on the top of two clamping frames (21), each V-shaped plate (51) is slidably connected to two ball pins (52), the ball head portion of the ball pin (52) is arranged on the pin body portion of the ball pin (52) in a ball joint manner and can abut against the main shaft of the honing head (12), and a plurality of threaded pins (53) corresponding to the ball pins (52) and used to drive the ball pins (52) to axially move are rotatably connected to the V-shaped plate (51).

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