Clamping device for processing equal division groove blocking pin

Abstract

The utility model relates to a blocking pin machining device technical field especially is involved in a kind of clamping device of processing equal division groove blocking pin. Including clamping body, the blocking pin mounting hole is equipped on the clamping body, the blocking pin mounting hole side is equipped with the top screw mounting hole, the top screw mounting hole is equipped with top screw, the top screw mounting hole one end with the blocking pin mounting hole intercommunication. The utility model can realize the positioning of blocking pin quickly by setting blocking pin mounting hole on clamping body;Through the intercommunication design of top screw mounting hole and blocking pin mounting hole, after making a through slot to blocking pin, make top screw can directly act on the through slot of blocking pin and fix blocking pin, prevent blocking pin rotation in subsequent through slot processing process, simultaneously, the secondary alignment step is saved, and it is simple and convenient to operate;Effectively avoid the problem that blocking pin clamping alignment is difficult, outer diameter is easily clamped and three axial grooves are poor in equal division precision, fully meet the production technology and use requirement of through slot milling machining on the outer circumferential wall of blocking pin.

Description

Technical Field

[0001] This utility model relates to the technical field of stop pin processing devices, and in particular to a clamping device for processing stop pins with equally divided grooves. Background Technology

[0002] With equally spaced slotted retaining pins (e.g.) Figure 1 and Figure 2 The part shown is installed inside the seal of the output drive shaft of some mechanical equipment, which plays the role of driving the seal to move synchronously with the output drive shaft; at the same time, it must not affect the performance of the seal. Therefore, the requirements for the outer diameter, surface roughness, and geometric tolerances of the three axial grooves of this stop pin are relatively high. This stop pin with equally divided grooves is characterized by its small size and high precision requirements, and traditional machining and clamping methods are difficult to meet the machining requirements of this part. Specifically, the turning process of this stop pin has completed the dimensional and precision machining of the outer diameter and end face. The milling process only needs to machine the equally divided grooves. If the milling process uses traditional chuck clamping, the radial and axial dimensions of the stop pin are small and cannot be directly clamped. Moreover, the traditional chuck clamping method will damage the precision of the already machined outer diameter and surface roughness due to the clamping force. Conventional special fixtures cannot automatically achieve accurate positioning and stable clamping during the machining of the three axial equally divided grooves, which can easily lead to uneven division and excessive geometric tolerances, failing to meet the usage requirements of the part. Therefore, it is urgent to design a new clamping device to solve the clamping problem in the machining process of the stop pin with equally divided grooves and ensure machining accuracy. Utility Model Content

[0003] To address the problem that traditional machining and clamping methods in the existing technology cannot meet the machining requirements of grooved stop pins, a clamping device for machining grooved stop pins is provided. This device achieves precise positioning and stable clamping of the grooved stop pins, ensuring that the outer diameter, surface roughness, and dimensional and positional tolerances of the three axial grooves of the stop pin meet the design requirements during the machining process.

[0004] This utility model provides a clamping device for processing grooved stop pins. The grooved stop pins have a through groove at 120° intervals along the outer circumference, for a total of 3 through grooves. The device includes a clamping body with a stop pin mounting hole. A set screw mounting hole is provided on one side of the stop pin mounting hole, and a set screw is provided in the set screw mounting hole. One end of the set screw mounting hole is connected to the stop pin mounting hole.

[0005] Furthermore, the set screw is detachably connected to the set screw mounting hole.

[0006] Furthermore, the set screw includes a screw rod, one end of which has a conical structure, and the screw rod has an external thread in the outer circumferential direction for threaded connection with the set screw mounting hole.

[0007] Furthermore, the included angle between the two opposite sidewalls of the through groove is 90°, and the apex angle of the conical structure is 90°.

[0008] Furthermore, the clamping body is made of an elastic material.

[0009] Furthermore, the top surface of the clamping body is provided with a milling cutter machining groove that communicates with the stop pin mounting hole, and the stop pin mounting hole is located directly below the milling cutter machining groove.

[0010] Furthermore, the length of the stop pin mounting hole is the same as the length of the clamping jig, and both ends of the stop pin mounting hole are connected to the outside; the length of the milling cutter machining groove is the same as the length of the clamping jig.

[0011] Furthermore, the parallelism difference between the central axis of the stop pin mounting hole and the clamping side and top surface of the clamping body is no greater than 0.02mm.

[0012] Furthermore, taking the axis of the stop pin mounting hole as the projection reference, in the projection plane perpendicular to the axis, the angle formed by the centerline of the milling cutter machining groove and the axis of the set screw mounting hole is 120°, and the angle error is no greater than 0.1°.

[0013] Furthermore, the bottom of the stop pin mounting hole is provided with a groove corresponding to the milling cutter machining groove.

[0014] In summary, compared with the prior art, this utility model has the following advantages: The technical solution provided by this utility model achieves rapid positioning of the stop pin by setting a stop pin mounting hole on the clamping body. The precise connection design between the set screw mounting hole and the stop pin mounting hole allows the set screw to directly act on the machined groove of the stop pin after a through groove is machined, fixing the stop pin and preventing it from rotating during subsequent through groove machining. This also eliminates the need for a secondary alignment step, making operation simple and convenient. The clamping device provided by this utility model offers convenient and quick alignment, high precision, reliable product quality, and strong interchangeability. It effectively avoids problems such as difficult stop pin clamping and alignment, easy damage to the outer diameter, and poor accuracy of the three axial groove divisions, fully meeting the production technology and usage requirements for through groove milling on the outer circumference of the stop pin. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a front view of the existing technology with equally spaced stop pins; Figure 2 The left view of the prior art with equally spaced stop pins; Figure 3 This is a front view of the clamped tire body in an embodiment of this utility model; Figure 4 This is a left view of the clamped tire body in an embodiment of this utility model; Figure 5 This is a diagram showing the state of the stop pin to be processed in the clamping device in an embodiment of this utility model; Figure 6 This is a left view of the stop pin to be processed in the clamping device in an embodiment of this utility model; Figure 7 This is a machining state diagram of a milling machine using a clamping device in an embodiment of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1-Clamping body; 101-Stop pin mounting hole; 102-Setting screw mounting hole; 103-Milling cutter machining groove; 104-Groove; 2-Setting screw; 3-Stop pin; 301-Through groove; 4-Milling cutter; 5-Flat-nose vises. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example A clamping device for machining equally spaced grooved stop pins, such as Figure 3 and Figure 4 As shown, it includes the clamping body 1 and the set screw 2, and the specific details are as follows: The clamping device provided by this utility model is used for machining stop pins with equally spaced grooves, such as... Figure 1 and Figure 2 As shown, the retaining pin with equal-divided grooves has one through groove 301 every 120° along the circumference, for a total of three through grooves 301. That is, three through grooves 301 need to be machined along the axial direction on the outer circumference of the retaining pin 3. The included angle between the two opposite sidewalls of the through grooves 301 is 90°.

[0022] like Figure 3 and Figure 4 As shown, the clamping jig body 1 is provided with a stop pin mounting hole 101. The length of the stop pin mounting hole 101 is the same as the length of the clamping jig body 1, and both ends of the stop pin mounting hole 101 are connected to the outside, which facilitates the installation and removal of the stop pin. The diameter of the stop pin mounting hole 101 is slightly larger than the diameter of the stop pin to be processed. For example, if the diameter of the stop pin to be processed is 6mm, the diameter of the stop pin mounting hole 101 can be 6.04mm-6.08mm.

[0023] A set screw mounting hole 102 is provided on one side of the stop pin mounting hole 101. A set screw 2 is provided in the set screw mounting hole 102. One end of the set screw mounting hole 102 is connected to the stop pin mounting hole 101, and the other end of the set screw mounting hole 102 is connected to the outside.

[0024] The set screw 2 is detachably connected to the set screw mounting hole 102, facilitating the installation and removal of the set screw 2 when machining different through slots 301. The set screw 2 includes a screw rod with a conical structure at one end. The screw rod has external threads on its outer circumference for threaded connection with the set screw mounting hole 102. This threaded connection ensures the stability of the set screw 2 installation and facilitates adjustment of the depth to which the set screw 2 extends into the stop pin mounting hole 101. The cone apex angle of the conical structure is 90°, which matches the angle of the through slot 301 with the equally spaced stop pin 3. When the set screw 2 is inserted into the through slot 301, precise positioning is achieved, preventing the stop pin from rotating or shifting during machining. To further facilitate the installation and removal of the set screw 2, the end of the screw rod away from the conical structure has an easy-to-remove operating part. The operating part is a slotted or hexagonal structure, allowing operators to easily rotate the set screw 2 using a slotted screwdriver or an hex wrench, improving operational convenience.

[0025] Set screw 2 can be a fully threaded slotted cone-end set screw with a 90° taper at the front end. The clamping body 1 is made of elastic material, such as 65Mn material. The elastic material has a certain elastic deformation capability. When clamping the stop pin 3, it can ensure that the stop pin 3 is firmly clamped, and can also avoid damage to the stop pin 3 or the clamping body 1 due to excessive rigidity. At the same time, it is convenient to install and remove the stop pin 3.

[0026] The top surface of the clamping jig 1 is provided with a milling cutter machining groove 103 that communicates with the stop pin mounting hole 101. The stop pin mounting hole 101 is located directly below the milling cutter machining groove 103. The milling cutter machining groove 103 provides machining space for the milling cutter, ensuring that the milling cutter can smoothly perform through-groove 301 milling on the stop pin 3. The length of the milling cutter machining groove 103 is consistent with the length of the clamping jig 1, ensuring that the through-groove 301 in the length direction of the stop pin 3 can be completely machined, avoiding incomplete machining. At the same time, both ends of the milling cutter machining groove 103 in the length direction are connected to the outside.

[0027] The parallelism difference between the central axis of the stop pin mounting hole 101 and the clamping side and top surface of the clamping body 1 is no more than 0.02mm. This precision design ensures that the axis position of the stop pin is accurate after installation, ensuring the straightness and positional accuracy of the through groove 301 and avoiding the machining deviation of the through groove 301 due to the tilt of the stop pin 3 installation.

[0028] Using the axis of the stop pin mounting hole 101 as the projection reference, in the projection plane perpendicular to the axis, the angle formed by the center line of the milling cutter machining groove 103 and the axis of the set screw mounting hole 102 is 120°, and the angle error is no greater than 0.1°. This angle design matches the interval angle of the through groove 301 with equally divided slotted stop pins. After machining one through groove 301, the stop pin 3 can be rotated 120° by the set screw 2 for positioning to accurately position the machining position of the next through groove 301, effectively ensuring the accuracy requirement of 120° interval between the three through grooves 301. The bottom of the stop pin mounting hole 101 is provided with a groove 104 corresponding to the milling cutter machining groove 103. Due to the elastic deformation capability of the clamping body 1, when the stop pin is clamped in the stop pin mounting hole 101, the groove 104 helps to protect the outer diameter accuracy and surface roughness of the stop pin, and facilitates convenient and quick loading and unloading. The processing steps using the clamping device provided in this embodiment are as follows: S1. Equipment preparation and positioning: After aligning the vise, fix it on the milling machine worktable; select shims of appropriate width and height and place them in the vise. S2. First clamping and machining: Insert the stop pin 3 to be machined into the stop pin mounting hole 101; place the clamping jig 1 with the stop pin 3 on the pad in the flat-jaw vise 5, and clamp the clamping jig 1 with the flat-jaw vise 5; adjust the position of the milling cutter 4 so that the tip of the milling cutter 4 forms a 45° angle with the vertical center line of the stop pin 3, start the milling machine, and perform milling machining on the first axial 90° through groove 301 of the stop pin 3. During the machining process, the milling cutter 4 guides the stop pin 3 through the milling cutter machining groove 103 on the top plane of the clamping jig 1. S3. Second clamping and machining: After the first through groove 301 is milled, stop the milling machine and remove the burrs from the first through groove 301 to avoid affecting the subsequent positioning accuracy; loosen the flat-jaw vise 5, take out the clamping jig 1, and rotate the stop pin 3 120° in the stop pin mounting hole 101; insert the set screw 2 into the set screw mounting hole 102, so that the 90° conical apex angle of the set screw 2 is inserted into the first through groove 301 of the stop pin 3. At this time, the conical structure of the set screw 2 matches the angle of the through groove 301 (e.g., Figure 5 and Figure 6 As shown), this achieves precise positioning of the stop pin 3, preventing it from rotating during processing; then, the clamping jig 1, with the stop pin 3 and set screw 2 clamped, is again clamped in the pad of the flat-jaw vise 5, and the flat-jaw vise 5 is tightened, as shown. Figure 7 As shown; readjust the position of the milling cutter 4 so that the tip of the milling cutter 4 forms a 45° angle with the vertical center line of the stop pin 3, start the milling machine, and begin machining the second through groove 301. S4. Third clamping and machining: After the second through groove 301 is milled, stop the milling machine and remove the burrs in the second through groove 301 of the stop pin; loosen the flat-jaw vise 5, take out the clamped jig 1, and use a flathead screwdriver to remove the set screw 2; rotate the stop pin 3 120° again in the stop pin mounting hole 101; repeat the set screw installation, jig clamping, and milling cutter adjustment steps in the second clamping and machining in step S3, start the milling machine, and complete the milling of the third through groove 301; after machining, loosen the flat-jaw vise 5, take out the clamped jig 1, remove the machined stop pin with equal-divided grooves from the stop pin mounting hole 101, and clean the chips on the clamped jig 1 and set screw 2 for the next use.

[0029] In response to the problems existing in the milling of the outer diameter through groove of the stop pin and its characteristics of mass production, our company's technical department and operators jointly developed a milling machine clamping device for the stop pin with equal grooves. The production process of using this clamping device to process the outer diameter through groove of the stop pin has proven that: the workpiece clamping and alignment is convenient and quick, the accuracy is high, the product quality is reliable, and the interchangeability is strong. It effectively avoids the problems of difficult clamping and alignment of the stop pin, easy damage to the outer diameter, and poor accuracy of the three axial grooves. It fully meets the production technology and usage requirements of milling the outer diameter through groove of the stop pin.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A clamping device for machining grooved stop pins, wherein the grooved stop pins have three through slots, each spaced at 120° intervals along their outer circumference; characterized in that... The device includes a clamping body (1), which has a stop pin mounting hole (101) on its side. A set screw mounting hole (102) is provided on one side of the stop pin mounting hole (101), and a set screw (2) is provided in the set screw mounting hole (102). One end of the set screw mounting hole (102) is connected to the stop pin mounting hole (101).

2. The clamping device according to claim 1, characterized in that, The set screw (2) is detachably connected to the set screw mounting hole (102).

3. The clamping device according to claim 2, characterized in that, The set screw (2) includes a screw rod, one end of which is a conical structure. The screw rod has an external thread in the outer circumferential direction for threaded connection with the set screw mounting hole (102).

4. The clamping device according to claim 3, characterized in that, The included angle between the two opposite sidewalls of the through groove is 90°, and the apex angle of the conical structure is 90°.

5. The clamping device according to claim 1, characterized in that, The clamping body (1) is made of elastic material.

6. The clamping device according to claim 5, characterized in that, The top plane of the clamping body (1) is provided with a milling cutter machining groove (103) that communicates with the stop pin mounting hole (101), and the stop pin mounting hole (101) is located directly below the milling cutter machining groove (103).

7. The clamping device according to claim 6, characterized in that, The length of the stop pin mounting hole (101) is the same as the length of the clamping body (1), and both ends of the stop pin mounting hole (101) are connected to the outside; the length of the milling cutter machining groove (103) is the same as the length of the clamping body (1).

8. The clamping device according to claim 1, characterized in that, The parallelism difference between the central axis of the stop pin mounting hole (101) and the clamping side and top surface of the clamping body (1) is no greater than 0.02mm.

9. The clamping device according to claim 6, characterized in that, With the axis of the stop pin mounting hole (101) as the projection reference, in the projection plane perpendicular to the axis, the angle formed by the center line of the milling cutter machining groove (103) and the axis of the set screw mounting hole (102) is 120°, and the angle error is no greater than 0.1°.

10. The clamping device according to claim 6, characterized in that, The bottom of the stop pin mounting hole (101) is provided with a groove (104) corresponding to the milling cutter machining groove (103).

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