A fixture for machining short shaft holes

Abstract

The present invention relates to a fixture for machining short-shaft holes. The fixture comprises a base plate, a pressure plate, a locating seat connecting the base plate and the pressure plate, and a locating shaft. The base plate and pressure plate clamp the ends of the short-shaft. The locating shaft passes through a component hole in the short-shaft, and its ends connect to the base plate and the pressure plate. The pressure plate is provided with through-holes corresponding to the holes to be machined in the short-shaft. This fixture can stably clamp the short-shaft and improve the accuracy of the holes machined on the short-shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and more particularly to a fixture for processing short-axis holes. Background Art

[0002] Currently, when drilling holes in short shafts, a simple fixture is used to position and secure the short shaft. The processing equipment then drills the desired hole. However, due to vibration and other factors during the drilling process, the current fixture cannot prevent the short shaft from shifting, ultimately affecting the quality of the machined hole and failing to meet the required accuracy.

[0003] The prior art CN105364557A discloses a fixture for processing holes in a reducer housing, including a base, a first pressure plate and a second pressure plate. The first pressure plate and the second pressure plate are arranged at the upper end of the base. The base includes a bottom plate and positioning plates on both sides of the bottom plate. Each positioning plate is provided with two positioning holes. The first pressure plate is provided with two, which are respectively located at opposite positions on the left and right sides of the upper end of the bottom plate. The second pressure plate is provided with two, which are respectively located at opposite positions on the front and back sides of the upper end of the bottom plate. A number of through holes are evenly distributed on the bottom plate.

[0004] The prior art discloses a technical solution that uses a first and second pressing plate to secure the component to be processed in four directions: front, back, left, and right, preventing the component from shifting during processing. However, this solution only secures the component to be processed horizontally, not vertically. This also results in substandard precision of the processed holes. Summary of the Invention

[0005] The invention provides a fixture for machining a short-axis hole, which can improve the machining accuracy of the hole.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0007] Disclosed is a fixture for machining short-axis holes, which includes a base plate, a pressure plate, a positioning shaft, and a positioning seat connecting the base plate and the pressure plate; the short axis is placed between the base plate and the pressure plate, the positioning shaft passes through the part hole on the short axis, and the two ends of the positioning shaft are connected to the base plate and the pressure plate; the pressure plate is a disc pressure plate, and the disc pressure plate is provided with a through hole corresponding to the hole to be machined in the short axis.

[0008] Preferably, the base plate and the positioning seat are connected via positioning columns.

[0009] Preferably, the positioning shaft and the base plate are connected via hexagon socket bolts.

[0010] Preferably, a positioning hole which is interference-fitted with the positioning shaft is provided on the bottom plate.

[0011] Preferably, the positioning shaft and the pressure plate are connected via a cylindrical pin and a shouldered hexagonal nut.

[0012] Preferably, the pressing plate and the positioning seat are connected via a latch.

[0013] Preferably, a connecting hole for connecting the positioning shaft is provided on the pressing plate.

[0014] Preferably, the connecting hole is arranged at the center of the disc pressure plate, and the through hole is arranged along the circumferential direction of the disc pressure plate.

[0015] Preferably, a convex table surface is provided on the disc, and the connecting hole is provided on the convex table surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The short shaft is fixed in all directions through the base plate, pressure plate and connecting shaft to avoid the short shaft offset during processing and improve the hole accuracy.

[0018] 2. The pressing plate is provided with a model through hole corresponding to the hole to be processed, which further improves the accuracy of the processed hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a fixture for machining short-axis holes of the present invention;

[0020] Figure 2 A top view of a pressure plate of a fixture for machining short-axis holes according to the present invention;

[0021] Figure 3 A side view of a pressure plate of a fixture for machining short-axis holes according to the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure between the positioning seat and the pressing plate of a fixture for machining short shaft holes of the present invention;

[0023] Figure 5 The figure is a schematic diagram of the pin structure of a fixture for machining short-axis holes according to the present invention. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0026] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like 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, and do not indicate or imply 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. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0029] Example 1

[0030] like Figures 1 to 3As shown, a fixture for processing short shaft holes is disclosed, which includes a base plate 1, a pressure plate 2, a positioning seat 3 connecting the base plate 1 and the pressure plate 2, and a positioning shaft 4; the short shaft 9 is placed between the base plate 1 and the pressure plate 2, the positioning shaft 4 passes through the part hole on the short shaft 9, and the two ends of the positioning shaft 4 are connected to the base plate 1 and the pressure plate 2; the pressure plate 2 is a disc pressure plate, and the disc pressure plate is provided with a through hole 10 corresponding to the hole to be processed in the short shaft 9.

[0031] As a component to be drilled, the short shaft 9 needs to be fixed in all directions to prevent it from being misaligned during the machining process and affecting the drilling accuracy of the short shaft 9. Since the short shaft 9 is a cylindrical structure, conventional clamping mechanisms such as chucks cannot clamp and fix the short shaft 9 at all.

[0032] In this embodiment, the short shaft 9 is secured in two main ways. The first method involves securing the short shaft 9 to be processed vertically by means of the base plate 1 and the pressure plate 2. Specifically, the lower end of the short shaft 9 is connected to the upper surface of the base plate 1, and the upper end of the short shaft 9 is connected to the lower surface of the pressure plate 2. The base plate 1 and the pressure plate 2 limit the short shaft 9 in the vertical direction. During the machining process, the short shaft 9 is clamped by the base plate 1 and the pressure plate 2, preventing vertical displacement.

[0033] The second fixing method is: the short shaft 9, the base plate 1, and the pressure plate 2 are jointly connected to the positioning shaft 4. Specifically, the positioning shaft 4 passes through the component hole in the short shaft 9, and the two ends of the positioning shaft 4 are respectively fixedly connected to the base plate 1 and the pressure plate 2. After the two ends of the positioning shaft 4 are fixed by the base plate 1 and the pressure plate 2, the positioning shaft 4 will not deviate left or right. Naturally, the short shaft 9 connected to the positioning shaft 4 will also not deviate left or right.

[0034] Finally, the short shaft 9 is fixed in all directions through two fixing methods, which effectively prevents the short shaft 9 from being displaced in the left and right and vertical directions during the drilling process, thereby ensuring the accuracy of the holes processed on the short shaft 9 when other equipment performs drilling processing on the short shaft 9.

[0035] The pressure plate 2 is set to be disc-shaped. When the center of the disc is used as the positioning coordinate, the corresponding through hole, that is, the model hole, can be drilled on the disc more accurately. The aperture and relative position of the model hole are consistent with the aperture and position of the hole to be processed on the short shaft 9. With the through hole 10 as a reference, the drill bit of the drilling equipment is directly aligned with the through hole 10 for drilling, and the hole to be processed on the short shaft 9 can be drilled directly on the short shaft 9. When the drilling equipment is aligned with the through hole 10 to drill the hole on the short shaft 9, the accuracy of the hole processed on the short shaft 9 will also be higher. It is further ensured that the accuracy and quality of the processed hole meet the requirements.

[0036] The ends of the locating seat 2 are connected to the base 1 and the pressure plate 2. The locating seat 2 protects the stability of the overall structure of the fixture and prevents shaking. The locating seat 2 can be a frame structure, which ensures the stable connection between the pressure plate 2 and the base 1. It also helps to reduce the weight of the fixture and facilitate the removal of iron chips and cooling.

[0037] Example 2

[0038] Disclosed is a fixture for machining short-axis holes, which includes a base plate 1, a pressure plate 2, a positioning seat 3 connecting the base plate 1 and the pressure plate 2, and a positioning shaft 4; the short axis 9 is placed between the base plate 1 and the pressure plate 2, the positioning shaft 4 passes through the part hole on the short axis 9, and the two ends of the positioning shaft 4 are connected to the base plate 1 and the pressure plate 2; the pressure plate 2 is provided with a through hole 10 corresponding to the hole to be machined in the short axis 9.

[0039] This embodiment differs from Example 1 in that the base plate 1 and the positioning seat 3 can be connected via positioning posts 5. Specifically, positioning grooves can be provided on the upper surface of the base plate 1 and the lower surface of the positioning seat 3, with the positioning posts 5 mounted within the grooves. This design improves the stability of the positioning seat 3 and the base plate 1, while also achieving a more precise connection and facilitating assembly and disassembly.

[0040] In order to ensure the connection stability between the positioning shaft 4 and the base plate 1, a variety of connection methods can be adopted between the positioning shaft 4 and the base plate 1. Specifically, the positioning shaft 4 and the base plate 1 can be connected by a hexagon socket bolt, or a positioning hole can be set on the base plate 1, and the positioning shaft 4 and the base plate 1 are connected by interference fit through the positioning hole.

[0041] In practical applications, when the base plate 1 and the positioning shaft 4 are connected by interference fit, the clamping force of the positioning shaft 4 is better, the offset is smaller, and the final machining hole accuracy on the short shaft 9 is higher. Therefore, the base plate 1 and the positioning shaft 4 are preferably connected by interference fit.

[0042] The locating seat 3 and the pressing plate 2 can be connected by a cylindrical pin 6 and a shouldered hexagonal nut 7. The pressing plate 2 and the locating seat 3 are connected by the pin 6, which not only reduces the connection gap between the locating seat 3 and the pressing plate 2 and improves the hole processing accuracy of the short shaft 9, but also makes the overall structure more stable and more convenient to install.

[0043] The height design of the shouldered hexagonal nut 7 is related to the depth of the tool. Assuming the nut height is h and the tool overhang on the processing equipment is x, to ensure that the tool does not interfere with the shouldered hexagonal nut and to ensure that the tool overhang is minimized, the following solutions should be met:

[0044] h=x+safety distance n

[0045] Note: The safety distance n is the minimum value at which the tool does not interfere with the shouldered hexagonal nut 7.

[0046] Example 3

[0047] Disclosed is a fixture for machining short-axis holes, which includes a base plate 1, a pressure plate 2, a positioning seat 3 connecting the base plate 1 and the pressure plate 2, and a positioning shaft 4; the short axis 9 is placed between the base plate 1 and the pressure plate 2, the positioning shaft 4 passes through the part hole on the short axis 9, and the two ends of the positioning shaft 4 are connected to the base plate 1 and the pressure plate 2; the pressure plate 2 is provided with a through hole 10 corresponding to the hole to be machined in the short axis 9.

[0048] This embodiment differs from the previous embodiment in that a connection hole 11 is provided on the pressing plate 2 for connection to the positioning shaft 4. Specifically, the pressing plate 2 can be configured in a disc shape, with the connection hole 11 provided at the center of the disc 2. When the holes to be machined are arranged in a circular pattern, the corresponding through holes 10 on the pressing plate 2 are provided along the circumference of the disc.

[0049] Specifically, a convex table 12 can be provided on the end portion where the pressure plate 2 connects to the positioning seat 3, and the connection hole 11 is provided on the convex table 12. Specifically, the cross-section of the convex table 12 is trapezoidal. The top size of the convex table 12 is just slightly smaller than the size of other process through-holes on the short shaft 9. When the fixture is used to fix the short shaft 9, part of the structure of the convex table 12 is located within the other process through-holes of the short shaft 9. The provision of the convex table 12 on the disc further secures the short shaft 9. At the same time, it can also provide preliminary positioning when installing and fixing the short shaft 9, reducing the assembly time of the short shaft 9 and the fixture, thereby improving processing efficiency.

[0050] In order to facilitate carrying of the base plate 1 , a handle 8 may be provided on the side wall of the base plate 1 .

[0051] Example 4

[0052] The difference between this embodiment and the above embodiments is that the installation and operation method of the clamp are disclosed.

[0053] First, fix the base 1 on the processing platform of the processing equipment and fix it with bolts or calipers. Then, assemble the positioning seat 3 and the positioning shaft 4 with the base 1 in sequence. Then, insert the short shaft 9 onto the positioning shaft 4 and align the pressure plate 2 with the positioning shaft 4 and the positioning seat 3 to complete the assembly of the pressure plate 2. At this point, the fixture is assembled and the short shaft 9 is fixed in all directions. The processing equipment begins to drill the short shaft 9. After the processing is completed, remove the pressure plate 2 and then remove the short shaft 9.

[0054] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the claims of the present invention.

Claims

1. A jig for machining short shaft holes, characterized in that: The clamp includes a base plate, a pressure plate, a positioning shaft, and a positioning seat connecting the base plate and the pressure plate; the short shaft is placed between the base plate and the pressure plate, the positioning shaft passes through the part hole on the short shaft, and the two ends of the positioning shaft are connected to the base plate and the pressure plate; the pressure plate is a disc pressure plate, and the disc pressure plate is provided with a through hole corresponding to the hole to be processed in the short shaft; the pressure plate and the positioning seat are connected by a pin; the pressure plate is provided with a connecting hole for connecting the positioning shaft; the connecting hole is provided at the center of the disc pressure plate, and the through hole is provided along the circumferential direction of the disc pressure plate; a convex table is provided on the disc, and the connecting hole is provided on the convex table; the cross-section of the convex table is trapezoidal; the lower end of the short shaft is connected to the upper surface of the base plate, and the upper end of the short shaft is connected to the lower surface of the pressure plate; the positioning seat is a frame structure; the top size of the convex table is slightly smaller than the size of other process through holes on the short shaft; when the short shaft is fixed, part of the structure of the convex table is located in other process through holes of the short shaft.

2. A jig for machining a short axis hole according to claim 1, characterized in that: The base plate and the positioning seat are connected via positioning columns.

3. A jig for machining a short axis hole according to claim 1, characterized in that: The positioning shaft and the base plate are connected via hexagon socket bolts.

4. A jig for machining a short axis hole according to claim 1, characterized in that: The bottom plate is provided with a positioning hole which is interference fit with the positioning shaft.

5. The jig for machining a short axis hole according to claim 1, characterized in that: The positioning shaft and the pressing plate are connected via a cylindrical pin and a shouldered hexagonal nut.

Images