Eccentric hole fixture and processing lathe

Abstract

The present application relates to the technical field of eccentric hole processing, and specifically to an eccentric hole fixture and processing lathe. The fixture includes a positioning seat and an internal expansion chuck assembly; wherein the positioning seat is used to connect to a machine platform, and the positioning seat is coaxially arranged with the rotating spindle of the machine platform; the internal expansion chuck assembly is inserted into the positioning seat, and at least part of the internal expansion chuck assembly can move radially along the positioning seat to adjust the distance between the central axis of the internal expansion chuck assembly and the rotating spindle in the radial direction of the positioning seat. The present application adopts an internal expansion chuck to position and clamp the inner hole of the product, and adjusts the eccentric outer diameter of the positioning column so that the outer diameter meets the eccentricity requirement of the inner hole of the product. A full-inclusive precision expansion clamp is used to meet the eccentricity while ensuring that the product's parallelism, flatness, verticality and cylindricity are within 0.01mm, and the position is within 0.015mm, meeting the accuracy requirements of the eccentric hole.

Description

Technical Field

[0001] The utility model relates to the technical field of eccentric hole processing, in particular to an eccentric hole fixture and a processing lathe. Background Art

[0002] In mechanical processing, the rotation center of some high-precision holes is not coaxial with the rotation center of the part, and has a certain eccentric distance. This part is called an eccentric part, and the hole that deviates from the rotation center of the part is called an eccentric hole. Due to the high requirements for the dimensional accuracy and surface finish of the eccentric hole, it is difficult to achieve the dimensional accuracy and surface finish requirements of the hole by precision boring in the machining center. Therefore, the processing of the eccentric hole can only be done by precision turning to ensure its dimensional accuracy and surface finish requirements.

[0003] In the related art, the shell workpiece is coaxially connected to the spindle of the CNC machine tool through a three-jaw chuck or a four-jaw chuck. Take the example of clamping the shell workpiece with a three-jaw chuck to machine an eccentric hole on it. At this time, it is necessary to add at least one gasket at the position of one of the claws of the three-jaw chuck and the shell workpiece so that the central axis of the shell workpiece moves a certain distance relative to the central axis of the spindle. However, it is difficult for the chuck fixture to meet the eccentricity while ensuring the parallelism, flatness, verticality and cylindricity of the product during processing, resulting in the product position and form tolerance failing to meet the requirements. Utility Model Content

[0004] It is difficult for the tooling and fixture for eccentric holes in related technologies to meet the eccentricity while ensuring the parallelism, flatness, verticality and cylindricity of the product during processing, resulting in the product position and form and position tolerances failing to meet the requirements.

[0005] The present application provides an eccentric hole fixture, which comprises: a positioning seat and an internal expansion chuck assembly; wherein,

[0006] A positioning seat, which is used to connect with the machine platform, and the positioning seat is coaxially arranged with the rotating main axis of the machine platform;

[0007] The inner expansion chuck assembly is inserted into the positioning seat, and at least a part of the inner expansion chuck assembly can move radially along the positioning seat to adjust the distance between the central axis of the inner expansion chuck assembly and the rotating main shaft in the radial direction of the positioning seat.

[0008] In combination with the first aspect, in one embodiment, the bottom surface of the positioning seat is used to be connected to the machine bolt, and the top surface of the positioning seat is provided with an eccentric adjustment assembly, and the eccentric adjustment assembly is clamped with the internal expansion chuck assembly, and the eccentric adjustment assembly is used to drive the internal expansion chuck assembly to move radially along the positioning seat.

[0009] In combination with the first aspect, in one embodiment, the eccentric adjustment assembly includes:

[0010] An eccentric slider, which is arranged on the top surface of the positioning seat;

[0011] An adjusting screw is arranged on the top surface of the positioning seat, and the adjusting screw is used to drive the eccentric sliding block to slide along the top surface of the positioning seat.

[0012] In combination with the first aspect, in one embodiment, the internal expansion chuck assembly includes:

[0013] A slider connecting rod, the first end of which extends out of the positioning seat and is engaged with the eccentric slider, and the slider connecting rod can move axially in the positioning seat;

[0014] The inner expansion clamp head is connected to the tail end of the slider connecting rod.

[0015] In combination with the first aspect, in one embodiment, the inner expansion chuck portion includes:

[0016] A conical guide block connected to the first end of the slider connecting rod;

[0017] A positioning expansion core is assembled on the eccentric slider, the positioning expansion core is sleeved outside the conical guide block, and the inner side surface of the positioning expansion core is at least partially in contact with the conical guide block; wherein,

[0018] The slider connecting rod can move axially to drive the positioning expansion core to expand outward or contract inward along its radial direction.

[0019] In combination with the first aspect, in one embodiment, an angular positioning block is provided on the eccentric sliding block, a mounting groove is provided in the angular positioning block, and the mounting groove accommodates the positioning expansion core.

[0020] In combination with the first aspect, in one embodiment, a slide rail is provided in the positioning seat and is radially arranged along the positioning seat, and the slide rail is movably connected to the tail end of the slider connecting rod.

[0021] In combination with the first aspect, in one embodiment, a storage cavity is provided in the positioning seat, a movable slider is provided in the storage cavity, the top end of the movable slider is connected to the slide rail, and the tail end of the movable slider is used to be connected to the push-pull stem of the machine. The movable slider can move axially along the positioning seat in the storage cavity to drive the slider connecting rod to move axially.

[0022] In combination with the first aspect, in one embodiment, the axial center line of the movable slider is colinear with the axial center line of the positioning seat.

[0023] In a second aspect, an embodiment of the present application provides a processing lathe, which includes: an eccentric hole tooling fixture as described in any one of the above items.

[0024] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0025] The present application adopts an internal expansion chuck to locate and clamp the inner hole of the product by adjusting the eccentric outer diameter of the positioning column so that the outer diameter meets the eccentricity requirement of the inner hole of the product. A full-inclusive precision expansion clamp is used to meet the eccentricity while ensuring that the parallelism, flatness, verticality and cylindricity of the product are within 0.01mm and the position accuracy is within 0.015mm, meeting the eccentric hole accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A cross-sectional view of an eccentric hole fixture in an embodiment of the present application;

[0028] Figure 2 It is an axial schematic diagram of the eccentric hole fixture in the implementation manner of the present application.

[0029] In the figure: 1. positioning seat; 11. storage cavity; 2. internal expansion chuck assembly; 21. slider connecting rod; 22. internal expansion chuck head; 221. conical guide block; 222. positioning expansion core; 3. eccentric adjustment assembly; 31. eccentric slider; 32. adjustment screw; 4. angular positioning block; 5. slide rail; 6. moving slider. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It is difficult for the tooling and fixture for eccentric holes in related technologies to meet the eccentricity while ensuring the parallelism, flatness, verticality and cylindricity of the product during processing, resulting in the product position and form and position tolerances failing to meet the requirements.

[0032] First, as Figure 1 , Figure 2 As shown, the present application provides an eccentric hole fixture, which includes:

[0033] A positioning seat 1, which is used to connect with the machine, and the positioning seat 1 is coaxially arranged with the rotating main axis of the machine;

[0034] The inner expansion chuck assembly 2 is inserted into the positioning seat 1 , and at least a portion of the inner expansion chuck assembly 2 can move radially along the positioning seat 1 to adjust the distance between the central axis of the inner expansion chuck assembly 2 and the rotating main axis in the radial direction of the positioning seat 1 .

[0035] It is understandable that the present application uses the inner expansion chuck assembly 2 as a clamping component for the workpiece, clamps the inner hole of the product, and processes the eccentric outer diameter so that the inner hole and the outer diameter achieve an eccentric effect and the processing meets the size requirements. Furthermore, the inner expansion chuck assembly 2 uses appropriate support position adjustment to ensure that the parallelism of the end face and the verticality of the end face and the outer diameter can achieve high precision and remain stable. At the same time, due to the large inner diameter support surface, it ensures that the cylindricity of the inner and outer circles after processing also reaches a high level. And by adjusting the eccentric outer diameter of the positioning column, the outer diameter meets the eccentricity requirement of the inner hole of the product, and a full-inclusive precision expansion clamp is used to meet the eccentricity while ensuring that the product's parallelism, flatness, verticality and cylindricity are within 0.01mm, and the position is within 0.015mm.

[0036] In some optional embodiments, the bottom surface of the positioning seat 1 is used to be connected to the machine bolts, and the top surface of the positioning seat 1 is provided with an eccentric adjustment assembly 3, and the eccentric adjustment assembly 3 is clamped with the internal expansion chuck assembly 2, and the eccentric adjustment assembly 3 is used to drive the internal expansion chuck assembly 2 to move radially along the positioning seat 1.

[0037] Specifically, the eccentric adjustment assembly 3 includes: an eccentric slider 31 and an adjustment screw 32; wherein,

[0038] An eccentric slider 31 is disposed on the top surface of the positioning seat 1 . An adjusting screw 32 is disposed on the top surface of the positioning seat 1 , and the adjusting screw 32 is used to drive the eccentric slider 31 to slide along the top surface of the positioning seat 1 .

[0039] It is worth noting that the user can drive the eccentric slider 31 to move by turning the adjusting screw 32 to adjust the position of the central axis of the inner expansion chuck assembly 2, thereby driving the workpiece to move and achieving the purpose of adjusting the eccentricity.

[0040] Specifically, the inner expansion chuck assembly 2 includes: a slider connecting rod 21 and an inner expansion chuck head 22; wherein,

[0041] The slider connecting rod 21 has a head end extending out of the positioning seat 1 and clamped with the eccentric slider 31, and the slider connecting rod 21 can move axially in the positioning seat 1; the inner clamping head 22 is connected to the tail end of the slider connecting rod 21.

[0042] Furthermore, the inner expansion chuck portion 22 includes: a conical guide block 221 and a positioning expansion core 222; wherein,

[0043] A conical guide block 221 is connected to the head end of the slider connecting rod 21; a positioning core 222 is assembled on the eccentric slider 31, the positioning core 222 is sleeved outside the conical guide block 221, and the inner side surface of the positioning core 222 is at least partially in contact with the conical guide block 221; wherein,

[0044] The slider connecting rod 21 can move axially to drive the positioning expansion core 222 to expand outward or contract inward along its radial direction.

[0045] It should be noted that in the above embodiment, when the positioning expansion core 222 expands radially outward, it abuts against the inner hole of the workpiece to fix the workpiece.

[0046] In some optional embodiments, Figure 1 As shown, the eccentric slider 31 is provided with an angular positioning block 4 , and the angular positioning block 4 is provided with a mounting groove, and the mounting groove accommodates the positioning expansion core 222 .

[0047] Preferably, in order to facilitate the adjustment of the eccentricity, a slide rail 5 is provided in the positioning seat 1 and is radially arranged along the positioning seat 1 , and the slide rail 5 is movably connected to the tail end of the slider connecting rod 21 .

[0048] It should be noted that the slide rail 5 can be replaced by a slide rod or other device, and other similar devices are also within the protection scope of the embodiments of the present application.

[0049] In some specific embodiments, a storage cavity 11 is provided in the positioning seat 1, and a movable slider 6 is provided in the storage cavity 11. The top end of the movable slider 6 is connected to the slide rail 5, and the tail end of the movable slider 6 is used to be connected to the push-pull stem of the machine. The movable slider 6 can move axially along the positioning seat 1 in the storage cavity 11 to drive the slider connecting rod 21 to move axially.

[0050] It can be understood that the main shaft of the connecting machine is controlled by the equipment hydraulic station to push and pull the movable slider 6 to drive the slider connecting rod 21 to move in the axial direction to realize automatic control of clamping, which can be suitable for mass production, fast and efficient, and precise clamping.

[0051] Preferably, the axial center line of the movable slider 6 is colinear with the axial center line of the positioning seat 1 .

[0052] On the other hand, the present application provides a machining lathe, comprising: an eccentric hole fixture, comprising: a positioning seat 1, which is used to connect with a machine platform, and the positioning seat 1 is coaxially arranged with a rotating spindle of the machine platform;

[0053] The inner expansion chuck assembly 2 is inserted into the positioning seat 1 , and at least a portion of the inner expansion chuck assembly 2 can move radially along the positioning seat 1 to adjust the distance between the central axis of the inner expansion chuck assembly 2 and the rotating main axis in the radial direction of the positioning seat 1 .

[0054] It is understandable that the present application uses the inner expansion chuck assembly 2 as a clamping component for the workpiece, clamps the inner hole of the product, and processes the eccentric outer diameter so that the inner hole and the outer diameter achieve an eccentric effect and the processing meets the size requirements. Furthermore, the inner expansion chuck assembly 2 uses appropriate support position adjustment to ensure that the parallelism of the end face and the verticality of the end face and the outer diameter can achieve high precision and remain stable. At the same time, due to the large inner diameter support surface, it ensures that the cylindricity of the inner and outer circles after processing also reaches a high level. And by adjusting the eccentric outer diameter of the positioning column, the outer diameter meets the eccentricity requirement of the inner hole of the product, and a full-inclusive precision expansion clamp is used to meet the eccentricity while ensuring that the product's parallelism, flatness, verticality and cylindricity are within 0.01mm, and the position is within 0.015mm.

[0055] In some optional embodiments, the bottom surface of the positioning seat 1 is used to be connected to the machine bolts, and the top surface of the positioning seat 1 is provided with an eccentric adjustment assembly 3, and the eccentric adjustment assembly 3 is clamped with the internal expansion chuck assembly 2, and the eccentric adjustment assembly 3 is used to drive the internal expansion chuck assembly 2 to move radially along the positioning seat 1.

[0056] Specifically, the eccentric adjustment assembly 3 includes: an eccentric slider 31 and an adjustment screw 32; wherein,

[0057] An eccentric slider 31 is disposed on the top surface of the positioning seat 1 . An adjusting screw 32 is disposed on the top surface of the positioning seat 1 , and the adjusting screw 32 is used to drive the eccentric slider 31 to slide along the top surface of the positioning seat 1 .

[0058] It is worth noting that the user can drive the eccentric slider 31 to move by turning the adjusting screw 32 to adjust the position of the central axis of the inner expansion chuck assembly 2, thereby driving the workpiece to move and achieving the purpose of adjusting the eccentricity.

[0059] Specifically, the inner expansion chuck assembly 2 includes: a slider connecting rod 21 and an inner expansion chuck head 22; wherein,

[0060] The slider connecting rod 21 has a head end extending out of the positioning seat 1 and clamped with the eccentric slider 31, and the slider connecting rod 21 can move axially in the positioning seat 1; the inner clamping head 22 is connected to the tail end of the slider connecting rod 21.

[0061] Furthermore, the inner expansion chuck portion 22 includes: a conical guide block 221 and a positioning expansion core 222; wherein,

[0062] A conical guide block 221 is connected to the head end of the slider connecting rod 21; a positioning core 222 is assembled on the eccentric slider 31, the positioning core 222 is sleeved outside the conical guide block 221, and the inner side surface of the positioning core 222 is at least partially in contact with the conical guide block 221; wherein,

[0063] The slider connecting rod 21 can move axially to drive the positioning expansion core 222 to expand outward or contract inward along its radial direction.

[0064] It should be noted that in the above embodiment, when the positioning expansion core 222 expands radially outward, it abuts against the inner hole of the workpiece to fix the workpiece.

[0065] In some optional embodiments, Figure 1 As shown, the eccentric slider 31 is provided with an angular positioning block 4 , and the angular positioning block 4 is provided with a mounting groove, and the mounting groove accommodates the positioning expansion core 222 .

[0066] Preferably, in order to facilitate the adjustment of the eccentricity, a slide rail 5 is provided in the positioning seat 1 and is radially arranged along the positioning seat 1 , and the slide rail 5 is movably connected to the tail end of the slider connecting rod 21 .

[0067] It should be noted that the slide rail 5 can be replaced by a slide rod or other device, and other similar devices are also within the protection scope of the embodiments of the present application.

[0068] In some specific embodiments, a storage cavity 11 is provided in the positioning seat 1, and a movable slider 6 is provided in the storage cavity 11. The top end of the movable slider 6 is connected to the slide rail 5, and the tail end of the movable slider 6 is used to be connected to the push-pull stem of the machine. The movable slider 6 can move axially along the positioning seat 1 in the storage cavity 11 to drive the slider connecting rod 21 to move axially.

[0069] It can be understood that the main shaft of the connecting machine is controlled by the equipment hydraulic station to push and pull the movable slider 6 to drive the slider connecting rod 21 to move in the axial direction to realize automatic control of clamping, which can be suitable for mass production, fast and efficient, and precise clamping.

[0070] Preferably, the axial center line of the movable slider 6 is colinear with the axial center line of the positioning seat 1 .

[0071] To summarize, the present application adopts an internal expansion chuck to locate and clamp the inner hole of the product by adjusting the eccentric outer diameter of the positioning column so that the outer diameter meets the eccentricity requirement of the inner hole of the product. A full-inclusive precision expansion clamp is used to meet the eccentricity while ensuring that the product's parallelism, flatness, verticality and cylindricity are within 0.01mm and the position accuracy is within 0.015mm, meeting the eccentric hole accuracy requirements.

[0072] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0073] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0074] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An eccentric hole fixture, characterized in that: include: A positioning seat (1) used for connecting to a machine platform, wherein the positioning seat (1) is coaxially arranged with a rotating main axis of the machine platform; An internal expansion chuck assembly (2) is inserted into the positioning seat (1), and at least a portion of the internal expansion chuck assembly (2) can move radially along the positioning seat (1) to adjust the distance between the central axis of the internal expansion chuck assembly (2) and the rotating main axis in the radial direction of the positioning seat (1).

2. The eccentric hole fixture as claimed in claim 1, characterized in that: The bottom surface of the positioning seat (1) is used for being connected to the machine platform by bolts, and the top surface of the positioning seat (1) is provided with an eccentric adjustment component (3), and the eccentric adjustment component (3) is clamped with the inner expansion chuck component (2), and the eccentric adjustment component (3) is used to drive the inner expansion chuck component (2) to move radially along the positioning seat (1).

3. The eccentric hole fixture as claimed in claim 2, characterized in that: The eccentric adjustment component (3) comprises: An eccentric slider (31) is arranged on the top surface of the positioning seat (1); An adjusting screw (32) is arranged on the top surface of the positioning seat (1), and the adjusting screw (32) is used to drive the eccentric sliding block (31) to slide along the top surface of the positioning seat (1).

4. The eccentric hole fixture as claimed in claim 3, characterized in that: The inner expansion chuck assembly (2) comprises: A slider connecting rod (21), the head end of which extends out of the positioning seat (1) and is engaged with the eccentric slider (31), and the slider connecting rod (21) can move axially in the positioning seat (1); The inner expansion clamping head (22) is connected to the rear end of the slider connecting rod (21).

5. The eccentric hole fixture as claimed in claim 4, characterized in that: The inner expansion clamping head (22) comprises: A conical guide block (221) connected to the head end of the slider connecting rod (21); A positioning expansion core (222) is assembled on the eccentric slider (31), the positioning expansion core (222) is sleeved outside the conical guide block (221), and the inner side surface of the positioning expansion core (222) is at least partially in contact with the conical guide block (221); wherein, The slider connecting rod (21) can move axially to drive the positioning expansion core (222) to expand outward or contract inward along its radial direction.

6. The eccentric hole fixture as claimed in claim 5, characterized in that: An angular positioning block (4) is provided on the eccentric sliding block (31), a mounting groove is provided in the angular positioning block (4), and the mounting groove accommodates the positioning expansion core (222).

7. The eccentric hole fixture as claimed in claim 4, characterized in that: A slide rail (5) is provided in the positioning seat (1) and is arranged radially along the positioning seat (1). The slide rail (5) is movably connected to the tail end of the slider connecting rod (21).

8. The eccentric hole fixture as claimed in claim 7, characterized in that: A storage cavity (11) is provided in the positioning seat (1), and a movable slider (6) is provided in the storage cavity (11). The top end of the movable slider (6) is connected to the slide rail (5), and the rear end of the movable slider (6) is used to be connected to the push-pull stem of the machine. The movable slider (6) can move axially along the positioning seat (1) in the storage cavity (11) to drive the slider connecting rod (21) to move axially.

9. The eccentric hole fixture as claimed in claim 8, characterized in that: The axial center line of the movable sliding block (6) is colinear with the axial center line of the positioning seat (1).

10. A processing lathe, characterized in that: include: An eccentric hole fixture as described in any one of claims 1 to 9.

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