A chucking device for machining a jaw part

Abstract

The utility model provides a kind of machine tooling clamping device of dog part. The machine tooling clamping device of dog part limiting piece, bush and mandrel, the first inner hole and second inner hole of dog part are sleeved on mandrel, second locating surface is equipped on the mandrel and abuts with the inner end face, the end of the mandrel is sequentially connected with bush and limiting piece and extends to the outside of dog part, the other end of the mandrel extends to the outside of dog part and forms clamping end;The one end of the bush is sleeved between mandrel and dog part, and first locating surface is equipped on the bush and abuts with the side end face, the limiting piece is connected on the mandrel and abuts with the bush;The end of the mandrel far from clamping end is centre end. The utility model can be stable and reliable clamping for landing gear dog part heat after one-time processing.

Description

Technical Field

[0001] This utility model relates to the field of landing gear parts processing technology, and in particular to a machining clamping device for a claw part. Background Technology

[0002] like Figure 1 As shown, the claw part 5 in the landing gear belongs to the landing gear lock structure. The processing steps of this part include turning, milling, grinding and pliers, and 12-20 grooves 51 are machined on its circumference, which form a function similar to a claw.

[0003] The existing machining process for groove 51 is as follows: Pre-heat machining involves installing ribs at the end of the part, then machining the middle of the groove using wire EDM, leaving a allowance before heating. Post-heat machining involves clamping the part on a CNC lathe, grinding machine, or four-axis machining center using a clamping and lifting method. Finally, the ribs at the end of the part are cut off.

[0004] In the existing processing method, during the post-heat processing, the wire EDM roughing of grooves requires alignment of each groove. This not only requires a high level of skill from the operators, but also results in poor rigidity due to excessive grooves on the parts, accompanied by abnormal vibrations during cutting, posing a significant quality risk. This makes it difficult to guarantee the machining accuracy and surface quality of the parts, and also results in low processing efficiency.

[0005] In recent years, with the application of new materials, more and more materials are prohibited from electrochemical machining methods (such as wire cutting, electrical discharge machining, etc.). The chuck parts need to be completed in one process after reheating. How to groove the chuck without roughing and ensure that the part is not deformed during clamping and is not prone to vibration after the groove is opened, while preventing the part from moving under large cutting forces, has become the current difficulty in the machining process of landing gear chucks. Utility Model Content

[0006] The purpose of this utility model is to provide a machining clamping device for landing gear claw parts, which can stably and reliably clamp landing gear claw parts for one-time post-heat machining.

[0007] The technical solution of this utility model is: a machining clamping device for a chuck part, used for clamping a chuck part. The chuck part has a first inner hole and a second inner hole that are connected inside. The axial bottom of the second inner hole forms an inner end face. The outer end of the chuck part with the first inner hole forms a side end face. The machining clamping device for the chuck part includes a limiting member, a bushing, and a mandrel. The first inner hole and the second inner hole of the chuck part are fitted onto the mandrel. The mandrel has a second positioning surface that abuts against the inner end face. One end of the mandrel extends to the outside of the chuck part and is connected to the bushing and the limiting member in sequence. The other end of the mandrel extends to the outside of the chuck part to form a clamping end. One end of the bushing is sleeved between the mandrel and the chuck part, and the bushing has a first positioning surface that abuts against the side end face. The limiting member is connected to the mandrel and abuts against the bushing. The end of the mandrel away from the clamping end is a center point.

[0008] Preferably, the mandrel includes a positioning pin and a clamping shaft connected to one end of the positioning pin. The diameter of the clamping shaft is larger than the diameter of the positioning pin, so that the end face of the clamping shaft extends beyond the outside of the positioning pin to form a second positioning surface. One end of the clamping shaft is sleeved in the second inner hole, and the other end of the clamping shaft extends to the outside of the chuck part to form the clamping end. The first inner hole, the bushing, and the limiting member are all provided on the positioning pin, and the positioning pin extends to the outside of the chuck part to form a top tip.

[0009] Preferably, the limiting member is a nut, which is threadedly connected to the mandrel.

[0010] Preferably, the bushing includes a shaft portion and a flange connected to one end of the shaft portion. The shaft portion is fitted onto the mandrel and located in the first inner hole of the chuck component. The end of the flange near the shaft portion is the first positioning surface, and the limiting member abuts against the flange.

[0011] Preferably, a tip hole is provided on the end face of the tip.

[0012] Preferably, the bushing is made of copper alloy.

[0013] Compared with related technologies, the beneficial effects of this utility model are as follows: I. This utility model is designed with bushings, mandrels and limiting parts, which can stably and efficiently clamp chuck parts, achieve stable grooving, reduce vibration, withstand the heat post-processing of tools with large cutting forces such as saw blade milling cutters and T-slot milling cutters, and ensure the processing quality of chucks; Second, after the clamping claw parts are installed, the present invention can realize one-time grooving after human intervention, without the need for grooving before heating, thereby greatly shortening the processing cycle. Third, this utility model can achieve rapid clamping of chuck parts within 5 minutes without adjustment. In mass production, there is no need to repeatedly find the origin, which shortens the auxiliary processing time of chuck parts and improves processing efficiency. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the chuck claw component; Figure 2 A schematic diagram of the structure of the clamping device for the jaw parts provided by this utility model; Figure 3 for Figure 2 A sectional view; Figure 4 This is a schematic diagram of the mandrel structure.

[0015] In the attached diagram: 1. Limiting component; 2. Bushing; 21. Shaft; 22. Flange; 23. First positioning surface; 4. Mandrel; 41. Positioning pin; 42. Clamping shaft; 43. Second positioning surface; 44. Center hole; 5. Claw component; 51. Groove; 52. First inner hole; 53. Second inner hole; 54. Inner end face; 55. Side end face. Detailed Implementation

[0016] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0017] like Figure 1 , Figure 2 As shown, this embodiment provides a machining clamping device for clamping a jaw part 5. The jaw part 5 has a first inner hole 52 and a second inner hole 53 that are connected inside. The axial bottom of the second inner hole 53 forms an inner end face 54, and the outer end of the jaw part 5 has a side end face 55. Multiple grooves 51 are circumferentially formed on the side wall of the jaw part 5 forming the first inner hole 52 to form a jaw.

[0018] like Figure 2 , Figure 3 As shown, the machining clamping device for the chuck part includes a limiting member 1, a bushing 2, and a mandrel 4.

[0019] like Figure 4As shown, the mandrel 4 includes a locating pin 41 and a clamping shaft 42 connected to one end of the locating pin 41. The diameter of the clamping shaft 42 is larger than the diameter of the locating pin 41, so that the end face of the clamping shaft 42 extending beyond the locating pin 41 forms a second locating surface 43. The coaxiality of the locating pin 41 and the clamping shaft 42 is within 0.03 mm. The surface roughness of the outer diameter of the mandrel 4 should be lower than RA1.6. The perpendicularity of the second locating surface 43 to the axis of the locating pin 41 is within 0.05 mm.

[0020] like Figure 2 , Figure 3 As shown, one end of the clamping shaft 42 is fitted into the second inner hole 53, and the other end of the clamping shaft 42 extends out of the chuck part 5 to form a clamping end, which is used to connect with the four-axis chuck of the machine tool. The length of the clamping end is 40-60mm. The outer diameter of the clamping end is 2-4mm smaller than the diameter of the second inner hole 53.

[0021] The first inner hole 52, bushing 2, and limiting member 1 are all fitted onto the positioning pin 41, and the tolerance of the positioning pin 41 is h7. The positioning pin 41 extends to the outside of the claw part 5 to form a pointed end. A pointed hole 44 is provided on the end face of the pointed end, and the pointed hole 44 is located on the axial direction of the positioning pin 41. An external thread is provided on the outer circular surface of the positioning pin 41, and the limiting member 1 is a nut, which is connected to the external thread on the positioning pin 41. The positioning pin 41 on which the bushing 2 is installed does not have an external thread.

[0022] like Figure 2 , Figure 3 As shown, the bushing 2 includes a shaft portion 21 and a flange 22 connected to one end of the shaft portion 21. The shaft portion 21 is fitted onto the mandrel 4 and located in the first inner hole 52 of the chuck part 5. The shaft portion 21 provides stable support for the chuck part 5 with the opening, preventing jumps and vibrations during machining.

[0023] The end of the flange 22 near the shaft 21 is the first positioning surface 23. After the limiting member 1 abuts against the flange 22 by means of threaded locking, the first positioning surface 23 abuts against the side end face 55, and at the same time, the second positioning surface 43 is tightly attached to the inner end face 54, so as to achieve effective clamping of the claw part 5.

[0024] The bushing 2 is made of copper alloy, utilizing the ductility of copper to achieve the purpose of clamping and loosening. The flange 22 has a thickness of 5mm.

[0025] The method for machining jaw parts using the machining clamping device for jaw parts provided by this utility model includes the following steps: S1. First, insert the mandrel 4 through the second inner hole 53, so that the second positioning surface 43 abuts against the inner end face 54. Then, fit the bushing 2 onto the positioning pin 41 and insert it into the first inner hole 52, so that the first positioning surface 23 abuts against the side end face 55. Fit the limiting member 1 onto the positioning pin 41 until it is locked, so that the limiting member 1 abuts against the outer end face of the flange 22, so that the first positioning surface 23 is in close contact with the side end face 55, and the second positioning surface 43 is in close contact with the inner end face 54, forming a... Figure 3 The state shown.

[0026] S2, then move the device for clamping jaw part 5 to the vertical machining center, clamp the four-axis vertical machining center chuck onto the clamping end, and insert the center into the center hole 44. Clamping is complete.

[0027] S3, start the machine tool, drive the machine tool A axis to rotate slowly, and dial the dial indicator to the outer circle of the second inner hole 53 of the chuck part, and check whether the runout is less than 0.03mm.

[0028] S4, for processing Using a saw blade milling cutter, the groove 51 on the chuck part 5 is machined. During the first piece machining process, the bushing 2 and the chuck part 5 are machined together, so that the bushing 2 has the same groove as the chuck. The chuck wall after slotting is still supported on the bushing 2.

[0029] S5. After processing is complete, loosen the limiting part 1, remove the bushing 2, and remove the mandrel 4 to complete the processing. No further cutting is required.

[0030] Then proceed with the above steps to process the next part.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A machining clamping device for a chuck part, used for clamping a chuck part (5), wherein the chuck part (5) has a first inner hole (52) and a second inner hole (53) that are connected inside, the axial bottom of the second inner hole (53) forms an inner end face (54), and the outer end of the first inner hole (52) of the chuck part (5) forms a side end face (55), characterized in that, The device includes a limiting member (1), a bushing (2), and a spindle (4). The first inner hole (52) and the second inner hole (53) of the claw part (5) are fitted onto the spindle (4). The spindle (4) has a second positioning surface (43) that abuts against the inner end face (54). One end of the spindle (4) extends to the outside of the claw part (5) and is connected to the bushing (2) and the limiting member (1) in sequence. The other end of the spindle (4) extends to the outside of the claw part (5) to form a clamping end. One end of the bushing (2) is fitted between the spindle (4) and the claw part (5), and the bushing (2) has a first positioning surface (23) that abuts against the side end face (55). The limiting member (1) is connected to the spindle (4) and abuts against the bushing (2). The end of the spindle (4) away from the clamping end is the tip end.

2. The machining clamping device for jaw parts according to claim 1, characterized in that, The mandrel (4) includes a positioning pin (41) and a clamping shaft (42) connected to one end of the positioning pin (41). The diameter of the clamping shaft (42) is larger than the diameter of the positioning pin (41), so that the end face of the clamping shaft (42) extends beyond the outside of the positioning pin (41) to form a second positioning surface (43). One end of the clamping shaft (42) is sleeved in the second inner hole (53), and the other end of the clamping shaft (42) extends to the outside of the claw part (5) to form the clamping end. The first inner hole (52), the bushing (2) and the limiting member (1) are all provided on the positioning pin (41), and the positioning pin (41) extends to the outside of the claw part (5) to form a top tip.

3. The machining clamping device for jaw parts according to claim 1, characterized in that, The limiting component (1) is a nut, which is threadedly connected to the spindle (4).

4. The machining clamping device for jaw parts according to claim 1, characterized in that, The bushing (2) includes a shaft (21) and a flange (22) connected to one end of the shaft (21). The shaft (21) is fitted onto the spindle (4) and located in the first inner hole (52) of the claw part (5). The end of the flange (22) near the shaft (21) is the first positioning surface (23). The limiting member (1) abuts against the flange (22).

5. The machining clamping device for jaw parts according to claim 1, characterized in that, The tip end has a tip hole (44) on its end face.

6. The machining clamping device for jaw parts according to claim 1, characterized in that, The bushing (2) is made of copper alloy.

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