Honing machine and double-feeding expansion cutter assembly for same

Abstract

The utility model provides a double-feed expansion cutter assembly for a honing machine and the honing machine. The double-feeding expansion cutter assembly comprises a main shaft, a first expansion cutter and a second expansion cutter, wherein a first cavity extending in the axial direction of the main shaft is formed in the main shaft; the outer push rod is contained in the first cavity, a second cavity extending in the axial direction of the outer push rod is formed in the outer push rod, and the outer push rod can be switched between a first initial position and a first working position; the inner push rod is contained in the second cavity and can be switched between a second initial position and a second working position, when the outer push rod is located at the first working position and the inner push rod is located at the second initial position, the honing machine is suitable for operating in a first mode, and when the outer push rod is located at the first initial position and the inner push rod is located at the second working position, the honing machine is suitable for operating in a second mode. The honing machine is adapted to operate in a second mode. According to the technical scheme, the problem that in the prior art, the internal structure of a servo double-feed honing machine is complex is solved.

Description

Technical Field

[0001] The utility model relates to the field of honing machines, and particularly provides a double-feed expansion tool assembly for a honing machine and a honing machine. Background Art

[0002] The existing double-feed expansion tool honing mechanism mainly adopts the method of using a hydraulic cylinder to eject a push rod or the method of using a servo motor to control the ejection of the push rod.

[0003] The feeding method of driving the push rod by a hydraulic cylinder is usually used for machining holes with large diameters. However, the method of driving the push rod by hydraulic pressure can only achieve constant-pressure honing, cannot achieve quantitative feeding honing, and even less can achieve constant-pressure - quantitative combined feeding honing. The ejection of the push rod can only start from the upper limit vertex and be ejected once until the honing stone contacts the workpiece, without control of the speed or the ejection amount in the middle. The action is too rough and simple, which easily causes the honing stone to break its edge, the workpiece to be stuck, and even damages the honing head and honing rod, making it difficult to obtain high-quality honing accuracy.

[0004] Chinese invention patent CN104290033B discloses a honing feed double-expansion tool mechanism, including: a box body, a fine honing expansion tool push rod and a rough honing expansion tool push rod, a first driving device for controlling the movement of the fine honing expansion tool push rod, and a second driving device for controlling the movement of the rough honing expansion tool push rod. The first driving device includes a first power source, a first lead screw, and a first pushing plate. The upper part of the fine honing expansion tool push rod is rotatably connected to the first pushing plate and can move up and down together with the first pushing plate; the second driving device includes a second power source, a second lead screw, and a second pushing plate. The upper part of the rough honing expansion tool push rod is rotatably connected to the second pushing plate and can move up and down together with the second pushing plate. This invention can achieve quantitative feeding control, constant-pressure feeding control, and constant-pressure - quantitative feeding control. Although the method of driving the push rod by servo has high machining accuracy, the servo driving device increases the design, machining, and assembly difficulties of the honing machine box body, and also increases the design of two feeding mechanisms. The number of parts increases and the structure is concentrated, increasing the machining and assembly difficulties.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0006] In order to solve the problem of the complex internal structure of the servo double-feed honing machine in the prior art, the present utility model provides a double-feed tool expanding assembly for a honing machine. The double-feed tool expanding assembly for a honing machine of the present utility model includes: a main shaft, and a first chamber extending along its axial direction is provided inside the main shaft; an outer push rod, the outer push rod is accommodated in the first chamber, a second chamber extending along its axial direction is provided inside the outer push rod, and the outer push rod can be switched between a first initial position and a first working position; an inner push rod, the inner push rod is accommodated in the second chamber, the inner push rod can be switched between a second initial position and a second working position, when the outer push rod is in the first working position and the inner push rod is in the second initial position, the honing machine is adapted to operate in a first mode, and when the outer push rod is in the first initial position and the inner push rod is in the second working position, the honing machine is adapted to operate in a second mode.

[0007] The double-feed tool expanding assembly of the present utility model includes a main shaft, and a first chamber for accommodating two push rods is provided in the middle of the main shaft. The first chamber extends along the axial direction of the main shaft, so that the outer push rod accommodated in the first chamber can move along the axial direction of the main shaft to cooperate with the honing head fixed at one end of the main shaft. A second chamber extending along the axial direction of the outer push rod is provided inside the outer push rod, so that the inner push rod accommodated in the second chamber can move along the axial direction of the outer push rod to cooperate with the honing head fixed at one end of the main shaft. When the outer push rod is in the first working position, it can drive a set of tools in the honing head connected to the main shaft to expand, so that the honing machine can operate in the first mode. When the inner push rod is in the first working position, it can drive another set of tools in the honing head connected to the main shaft to expand, so that the honing machine can operate in the second mode.

[0008] In a preferred technical solution of the above double-feed tool expanding assembly, at least a part of the outer push rod forms a clearance fit with the main shaft, so that the outer push rod can slide along the axial direction of the main shaft. Through the above setting, when the main shaft drives the honing head connected thereto to rotate, the outer push rod part follows the main shaft to rotate, so that the outer push rod always only makes a linear motion along the axial direction of the main shaft, simplifying the internal structure of the honing machine.

[0009] In a preferred technical solution of the above double-feed tool expanding assembly, the main shaft includes a first end portion, and the first chamber has a first opening formed on the first end portion; the outer push rod includes a first end of the outer rod, and the first end of the outer rod always extends beyond the first opening. Through the above setting, one end of the outer push rod always extends beyond the first opening, so that the transmission mechanism inside the honing machine can be connected to the part of the outer push rod beyond the first opening to achieve transmission, thereby avoiding grooving on the main shaft and reducing the strength of the main shaft.

[0010] In the preferred technical solution of the above double-feed expansion tool assembly, the second chamber has a second opening formed at the first end of the outer rod; the inner push rod includes a first end of the inner rod, and the first end of the inner rod always extends beyond the second opening. Through the above arrangement, one end of the inner push rod always extends beyond the second opening, so that the transmission mechanism inside the honing machine can be connected to the part of the inner push rod that extends beyond the second opening to achieve transmission, thereby avoiding grooving on the outer push rod and reducing the strength of the outer push rod.

[0011] In the preferred technical solution of the above double-feed expansion tool assembly, the double-feed expansion tool assembly further includes a first driving device and a second driving device. The first driving device is fixedly connected to the outer push rod and can drive the outer push rod to switch between the first initial position and the first working position. The second driving device is fixedly connected to the inner push rod and can drive the inner push rod to switch between the second initial position and the second working position. Through the above arrangement,

[0012] In the preferred technical solution of the above double-feed expansion tool assembly, both the first driving device and the second driving device are servo motors. Through the above arrangement, the servo motor can achieve quantitative feed control and improve honing accuracy.

[0013] In the preferred technical solution of the above double-feed expansion tool assembly, the first driving device is fixedly connected to the first end of the outer rod, and the second driving device is fixedly connected to the first end of the inner rod. Through the above configuration, when the first driving device drives the outer push rod to switch between the first initial position and the first working position, it is always located outside the first opening, simplifying the structure of the main shaft and ensuring the structural strength of the main shaft. When the second driving device drives the inner push rod to switch between the second initial position and the second working position, it is always located outside the second opening, simplifying the structure of the outer push rod and ensuring the structural strength of the outer push rod.

[0014] To solve the problem of the complex internal structure of the servo double-feed honing machine in the prior art, the present invention also provides a honing machine. The honing machine includes: the preferred technical solution of any one of the above double-feed expansion tool assemblies for a honing machine; and a honing head, the honing head is fixedly connected to the main shaft and includes a rough honing tool group and a fine honing tool group. When the outer push rod is in the first working position and the inner push rod is in the second initial position, the rough honing tool group expands and the fine honing tool group is accommodated inside the honing head; when the outer push rod is in the first initial position and the inner push rod is in the second working position, the fine honing tool group expands and the rough honing tool group is accommodated inside the honing head. Through the setting of the double-feed expansion tool assembly, the structure of the main shaft is relatively simple and has high strength, so that the honing machine of the present invention can be applied to the honing operation of large-size holes.

[0015] In the preferred technical solution of the above-mentioned honing machine, the honing machine further includes a speed reducer for driving the main shaft to rotate around its axial direction. The speed reducer includes a mounting hole, and the main shaft extends through the mounting hole. Through the above configuration, the speed reducer drives the main shaft to rotate around its axial direction, and at the same time does not interfere with the outer push rod and the inner push rod arranged inside the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention will be described below with reference to the drawings, in which:

[0017] Figure 1 is a schematic structural diagram of an embodiment of the honing machine of the present invention;

[0018] Figure 2 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present invention in the first state;

[0019] Figure 3 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present invention in the second state;

[0020] Figure 4 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present invention in the third state.

[0021] LIST OF REFERENCE NUMERALS:

[0022] 100, double-feed tool expanding assembly; 10, main shaft; 11, first chamber; 111, first opening; 112, docking port; 12, first end; 13, second end; 20, outer push rod; 21, first end of outer rod; 22, second end of outer rod; 23, second chamber; 231, second opening; 30, inner push rod; 31, first end of inner rod; 32, second end of inner rod; 41, first driving device; 42, second driving device; 500, honing machine; 60, speed reducer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The preferred embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0024] It should be noted that in the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "arranged" 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 directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] To solve the problem of the complex internal structure of the servo double-feed honing machine in the prior art, the present utility model provides a double-feed tool expanding assembly 100 for a honing machine. The double-feed tool expanding assembly 100 for a honing machine of the present utility model includes: a main shaft 10, and a first chamber 11 extending along its axial direction is provided inside the main shaft 10; an outer push rod 20, the outer push rod 20 is accommodated in the first chamber 11, a second chamber 23 extending along its axial direction is provided inside the outer push rod 20, and the outer push rod 20 can be switched between a first initial position and a first working position; an inner push rod 30, the inner push rod 30 is accommodated in the second chamber 23, the inner push rod 30 can be switched between a second initial position and a second working position. When the outer push rod 20 is in the first working position and the inner push rod 30 is in the second initial position, the honing machine 500 is adapted to operate in a first mode. When the outer push rod 20 is in the first initial position and the inner push rod 30 is in the second working position, the honing machine 500 is adapted to operate in a second mode.

[0027] Figure 1 is a schematic structural diagram of an embodiment of the honing machine of the present utility model; Figure 2 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present utility model in a first state; Figure 3 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present utility model in a second state; Figure 4 is a cross-sectional view of an embodiment of the double-feed tool expanding assembly of the present utility model in a third state. The structure and working principle of the double-feed tool expanding assembly 100 will be elaborated in detail below in conjunction with Figures 1 to 4 The structure and working principle of the double-feed tool expanding assembly 100 will be elaborated in detail below.

[0028] As Figure 1 and 2 shown, the double-feed tool expanding assembly 100 for a honing machine 500 of the present utility model includes an inner push rod 30, an outer push rod 20 sleeved outside the inner push rod 30, and a main shaft 10 sleeved outside the outer push rod 20.

[0029] Continue to refer to Figure 2, in one or more embodiments, the main shaft 10 is configured as a generally cylindrical member and includes a first chamber 11 formed therein, the first chamber 11 extending along the axial direction of the main shaft 10. The main shaft 10 further includes opposite first end 12 and second end 13, wherein the second end 13 is adapted to be connected to the honing head of the honing machine 500 to control the tool expansion in the honing head and to control the rotation of the honing head. The first chamber 11 has a first opening 111 formed at the first end 12 and a mating port 112 formed at the second end 13.

[0030] As Figure 2 and Figure 3 shown, in one or more embodiments, the outer push rod 20 can move axially along the main shaft 10 in the first chamber 11 between a first initial position and a first working position. Based on Figure 2 the orientation shown, the outer push rod 20 can move in the up and down direction. The outer push rod 20 includes opposite first end 21 and second end 22 of the outer rod, wherein when the outer push rod 20 moves between the first initial position and the first working position, the first end 21 of the outer rod always extends beyond the first opening 111 (based on Figure 2 the orientation shown, that is, the first end 21 of the outer rod is always located above the first opening 111). In the first working position, the second end 22 of the outer rod is located at the mating port 112 to be docked with the transmission mechanism in the honing head, so that the second end 22 of the outer rod drives the tool in the honing head to expand through the transmission mechanism, and the honing machine 500 operates in the first mode. Exemplarily, the outer push rod 20 can drive the rough honing tool to expand, and the honing machine 500 operates in the rough honing mode. Alternatively, the outer push rod 20 can also control the expansion of other tools according to actual needs.

[0031] In one or more embodiments, when the outer push rod 20 moves between the first initial position and the first working position, at least a part of the outer push rod 20 contacts the inner wall of the main shaft 10 facing the outer push rod 20, and this part of the outer push rod 20 is configured to form a clearance fit with the main shaft 10, so that the main shaft 10 can rotate independently without affecting the outer push rod 20, and the outer push rod 20 only makes a linear motion of moving between the first initial position and the first working position, so as to simplify the structure of the double-feed tool expansion assembly 100.

[0032] As Figure 2 and Figure 4As shown, in one or more embodiments, a second chamber 23 is further provided inside the outer push rod 20. The second chamber 23 extends along the axial direction of the outer push rod 20. In one or more embodiments, the axial direction of the outer push rod is parallel to the axial direction of the main shaft. The second chamber 23 has a second opening 231 formed at the first end 21 of the outer rod. In one or more embodiments, the inner push rod 30 is received in the second chamber 23 and can be switched between a second initial position and a second working position along the axial direction of the outer push rod 20. The inner push rod 30 includes an opposite first end 31 of the inner rod and a second end 32 of the inner rod. Wherein, when the inner push rod 30 moves between the second initial position and the second working position, the first end 31 of the inner rod always extends beyond the second opening 231 (based on Figure 2 the shown orientation, that is, the first end 31 of the inner rod is always located above the second opening 231). In the first working position, the second end 32 of the inner rod is located at the docking port 112 to be docked with the transmission mechanism in the honing head, so that the second end 32 of the inner rod drives another set of tools in the honing head to expand through the transmission mechanism, and the honing machine 500 operates in the second mode. Exemplarily, the inner push rod 30 can drive the fine honing tool to expand, and the honing machine 500 operates in the fine honing mode. Alternatively, the inner push rod 30 can also control the expansion of other tools according to actual needs. In one or more embodiments, a clearance fit is formed between the inner push rod 30 and the outer push rod 20, so that the inner push rod 30 can be independently switched between the second initial position and the second working position.

[0033] In one or more embodiments, the double-feed tool expanding assembly 100 further includes a first driving device 41 for driving the outer push rod 20 to switch between a first initial position and a first working position, and a second driving device 42 for driving the inner push rod 30 to switch between a second initial position and a second working position. The first driving device 41 is fixedly connected to the first end 21 of the outer rod. The second driving device 42 is fixedly connected to the first end 31 of the inner rod. Alternatively, the first driving device 41 can also be fixedly connected to other suitable positions of the outer push rod 20. The second driving device 42 can also be fixedly connected to other suitable positions of the inner push rod 30. In one or more embodiments, both the first driving device 41 and the second driving device 42 are configured as servo motors, and the lead screws of the servo motors are parallel to the axial direction of the main shaft 10 to drive the outer push rod 20 and the inner push rod 30 to move along the axial direction of the main shaft 10.

[0034] Continuing to refer to Figure 1 and Figure 2 This utility model further provides a honing machine 500. The honing machine 500 includes the above-mentioned double-feed tool expanding assembly 100 for the honing machine 500 and a honing head. As Figure 2As shown, in one or more embodiments, the honing head forms a fixed connection with the second end 13 of the main shaft 10. Alternatively, the honing head can also be arranged at other suitable positions on the honing machine 500. In one or more embodiments, the honing head includes a rough honing cutter set and a fine honing cutter set. As Figure 2 shown, when the outer push rod 20 is in the first initial position and the inner push rod 30 is in the second initial position, both the second end 22 of the outer rod and the second end 32 of the inner rod are away from the docking port 112, and both the rough honing cutter set and the fine honing cutter set are hidden inside the honing head. As Figure 3 shown, when the outer push rod 20 is in the first working position and the inner push rod 30 is in the second initial position, the second end 22 of the outer rod is located at the docking port 112 and drives the rough honing cutter set in the honing head to expand, while the fine honing cutter set is hidden inside the honing head, and the honing machine 500 operates in the rough honing mode. As Figure 4 shown, when the outer push rod 20 is in the first initial position and the inner push rod 30 is in the second working position, the second end 32 of the inner rod is located at the docking port 112 and drives the fine honing cutter set in the honing head to expand, while the rough honing cutter set is hidden inside the honing head, and the honing machine 500 operates in the fine honing mode.

[0035] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A double-feed expansion tool assembly for a honing machine, characterized in that: The double feed expansion tool assembly comprises: A main shaft, wherein a first chamber extending along the axial direction of the main shaft is provided inside the main shaft; An outer push rod, the outer push rod is accommodated in the first chamber, a second chamber extending along the axial direction of the outer push rod is provided inside the outer push rod, and the outer push rod can be switched between a first initial position and a first working position along the axial direction of the main shaft; An inner push rod, which is accommodated in the second chamber, and the inner push rod can be switched between a second initial position and a second working position along the axial direction of the outer push rod, when the outer push rod is located at the first working position and the inner push rod is located at the second initial position, the honing machine is suitable for operating in a first mode, and when the outer push rod is located at the first initial position and the inner push rod is located at the second working position, the honing machine is suitable for operating in a second mode.

2. The double feed expansion cutter assembly according to claim 1, characterized in that: At least a portion of the outer push rod forms a clearance fit with the main shaft, so that the outer push rod can slide along the axial direction of the main shaft and switch between the first initial position and the first working position.

3. The double feed expansion cutter assembly according to claim 1, characterized in that: The spindle includes a first end, the first chamber having a first opening formed on the first end; The outer push rod includes an outer rod first end, and the outer rod first end always extends beyond the first opening.

4. The double feed expansion cutter assembly according to claim 3, characterized in that: The second chamber has a second opening formed on the first end of the outer rod; The inner push rod comprises an inner rod first end, and the inner rod first end always extends beyond the second opening.

5. The double feed expansion cutter assembly according to claim 4, characterized in that: The double-feed expansion tool assembly also includes a first drive device and a second drive device, the first drive device is fixedly connected to the outer push rod and can drive the outer push rod to switch between the first initial position and the first working position, and the second drive device is fixedly connected to the inner push rod and can drive the inner push rod to switch between the second initial position and the second working position.

6. The double feed expansion cutter assembly according to claim 5, characterized in that: The first driving device and the second driving device are both servo motors.

7. The double feed expansion cutter assembly according to claim 5, characterized in that: The first driving device is fixedly connected to the first end of the outer rod, and the second driving device is fixedly connected to the first end of the inner rod.

8. A honing machine, characterized in that: The honing machine comprises: A double feed expansion tool assembly for a honing machine according to any one of claims 1 to 7; and A honing head, which is fixedly connected to the spindle and includes a rough honing tool group and a fine honing tool group. When the outer push rod is located at the first working position and the inner push rod is located at the second initial position, the rough honing tool group bulges out and the fine honing tool group is accommodated inside the honing head; when the outer push rod is located at the first initial position and the inner push rod is located at the second working position, the fine honing tool group bulges out and the rough honing tool group is accommodated inside the honing head.

9. The honing machine according to claim 8, characterized in that: The honing machine further includes a speed reducer for driving the main shaft to rotate around its axial direction, wherein the speed reducer includes a mounting hole through which the main shaft extends.

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