Parallel shaft sleeve end face machining tool

Abstract

The utility model provides a parallel shaft sleeve end face machining tool which comprises a core shaft base clamped by a chuck, a floating block and a rotary locking piece, a core shaft part sleeved with a shaft sleeve to be machined is formed at the front end of the core shaft base, and a rotary cavity is formed in the core shaft part. A plurality of radial sliding holes communicated with the rotating cavity are formed in the outer wall of the core shaft part in the circumferential direction, the rotating locking piece is rotationally installed in the rotating cavity, the floating blocks are installed in the radial sliding holes in a sliding mode, a wedge-shaped locking part is formed on the rotating locking piece, and the wedge-shaped locking part is matched with the wedge-shaped locking part. And the wedge-shaped locking part drives the floating block to move outwards under the rotation of the rotary locking piece and is in abutting contact with the inner side of the shaft sleeve to be machined. The shaft sleeve part with unstable inner hole size and low precision can be locked and fixed, so that the subsequent processing requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft sleeve processing, in particular to a parallel shaft sleeve end surface processing tool. Background Art

[0002] The parallel sleeves produced by our company are cast parts. The process requires only cutting of the flange end faces at both ends and ensuring a parallelism of 0.005mm.

[0003] However, since the inner hole of the parallel sleeve is cast, there will be a deviation of about ±0.2 mm in the hole size between batches of parts. Conventional expansion mandrels and tapered mandrels are difficult to complete the positioning operation during the processing of the parallel sleeve. Therefore, it is urgent to develop a tooling for processing the end face of the parallel sleeve. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a parallel shaft sleeve end surface processing tool.

[0005] The technical solution of the utility model is a parallel sleeve end surface processing tool, including a mandrel base for chuck clamping, a floating block and a rotary locking piece, the front end of the mandrel base is formed with a mandrel part for the sleeve to be processed, a rotating cavity is provided in the mandrel part, and a plurality of radial sliding holes connected with the rotating cavity are provided in the outer wall of the mandrel part along the circumferential direction, the rotating locking piece is rotatably installed in the rotating cavity, the floating block is slidably installed in the radial sliding hole, and a wedge-shaped locking part is formed on the rotating locking piece, and the wedge-shaped locking part drives the floating block to move outward and contact with the inner side of the sleeve to be processed under the rotation of the rotating locking piece. The floating block has a certain stroke driven by the wedge-shaped locking part, and can lock and fix the sleeve parts with unstable inner hole size and low precision, so as to meet the processing needs.

[0006] A rotation groove is formed at the bottom of the rotation cavity, and a rotation part which is gap-matched with the rotation groove is formed at the inner end of the rotation locking piece.

[0007] The core shaft portion is provided with an exhaust port connected to the rotating groove, and the exhaust port is provided to exhaust the air resistance generated when the rotating portion is inserted into the rotating groove and is in clearance fit with the rotating groove, thereby ensuring that the rotating locking member is installed in place.

[0008] One end of the floating block close to the rotary locking member is formed into a driving portion with an outer arc cross section, and the wedge-shaped locking portion has an inner arc surface matched with the driving portion.

[0009] The inner arc surface is raised in the opposite direction to the rotation direction of the chuck. The inner arc surface is raised in a direction different from the rotation direction of the chuck, so that the inner arc surface of the wedge-shaped locking part is affected by the cutting force during the contact between the inner arc surface and the floating block. The greater the cutting force of the part, the greater the locking force formed, and the more stable the sleeve to be processed.

[0010] The two ends of the inner arc surface are tangent to the surface of the rotary locking member and the upper edge surface of the wedge-shaped locking portion respectively.

[0011] A limiting plate is formed on the outer side of the driving part of the floating block to limit the floating block from completely moving out of the radial sliding hole. The limiting plate can prevent the floating block from sliding off when the shaft sleeve is installed or removed.

[0012] The beneficial effects of the utility model are as follows: by providing a rotating locking member and a floating block with a wedge-shaped locking portion, the floating block has a certain stroke driven by the wedge-shaped locking portion, thereby locking and fixing the shaft sleeve parts with unstable inner hole dimensions and low precision, thereby meeting the needs of processing positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is the front view of the utility model;

[0015] Figure 3 It is a partial cross-sectional view of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the central shaft base of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the rotary locking member in the utility model;

[0018] Figure 6 It is a structural schematic diagram of the floating block in the utility model.

[0019] Figure numerals: 1. spindle base; 2. spindle part; 201. rotating cavity; 202. radial sliding hole; 203. exhaust port; 204. rotating groove; 3. rotating locking piece; 301. rotating part; 302. wedge-shaped locking part; 303. inner arc surface; 4. floating block; 401. driving part; 402. limiting plate; 5. shaft sleeve to be processed. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution in the utility model, the technical solution in the utility model is clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should all fall within the protection scope of the utility model.

[0021] like Figure 1 and Figure 2 As shown, the utility model provides a parallel sleeve end surface processing tool, including a mandrel base 1 for chuck clamping, a floating block 4 and a rotary locking member 3, the front end of the mandrel base 1 is formed with a mandrel portion 2 for sleeve connection of a sleeve 5 to be processed, as shown in FIG. Figure 4 As shown, a rotating cavity 201 is provided in the core shaft portion 2, and a plurality of radial sliding holes 202 connected to the rotating cavity 201 are provided on the outer wall of the core shaft portion 2 along the circumferential direction. In this embodiment, there are three radial sliding holes 202, which are evenly distributed on the outer wall of the core shaft portion 2. Figure 3 As shown, a rotation groove 204 is provided at the bottom of the rotation cavity 201, and a rotation portion 301 is formed at the inner end of the rotation locking member 3 with a clearance fit of the rotation groove 204. The rotation locking member 3 realizes a rotation connection in the rotation cavity 201 through the rotation portion 301. In this embodiment, the rotation groove 204 is set as an H7 hole with a diameter of 6 mm, and the rotation portion 301 has a matching tolerance of 6 mm G7, and the rotation groove 204 is coaxially arranged with the rotation cavity 201; the floating block 4 is slidably installed in the radial sliding hole 202, and a wedge-shaped locking portion 302 is formed on the rotation locking member 3. The wedge-shaped locking portion 302 drives the floating block 4 to move outward under the rotation of the rotation locking member 3 and is in tight contact with the inner side of the shaft sleeve 5 to be processed, wherein, as Figure 2 and Figure 6 As shown, one end of the floating block 4 close to the rotation locking member 3 is formed into a driving portion 401 with an outer arc cross section. Figure 2 and Figure 5 As shown, the wedge-shaped locking portion 302 has an inner arc surface 303 that matches with the driving portion 401. The wedge-shaped locking portion 302 moves by driving the driving portion 401 of the floating block 4 until the outer arc surface of the driving portion 401 matches with the inner arc surface 303 of the wedge-shaped locking portion 302. At this time, the upper end of the floating block 4 moves a certain distance and abuts against the inner side of the sleeve 5 to be processed. The outer contact part of the floating block 4 is an arc with the same design size of the inner diameter of the sleeve 5 to be processed, so as to lock and fix the sleeve parts with unstable inner hole forming size and low precision of the company to meet the needs of subsequent processing.

[0022] Further preferably, the rising direction of the inner arc surface 303 is opposite to the rotation direction of the chuck. Figure 2As shown, the rotary locking member 3 rotates along the C direction (which is opposite to the rising direction of the inner arc surface 303) to drive the floating block 4 to move outward, and the rotation direction of the chuck is A. The machining tool processes the end face of the sleeve 5 to be machined along B. The cutting force generated on the sleeve will drive the driving part 401 of the floating block 4 to move in the rising direction of the inner arc surface 303, thereby driving the floating block 4 to move outward, and the locking force formed between the floating block 4 and the inner side of the sleeve 5 to be machined is increased. At this time, as the cutting process proceeds, the sleeve 5 to be machined will be more stably locked on the tooling.

[0023] In order to make the wedge-shaped locking portion 302 drive the floating block 4 more smoothly, the two ends of the inner arc surface 303 are tangent to the surface of the rotation locking member 3 and the upper edge surface of the wedge-shaped locking portion 302 respectively.

[0024] In this embodiment, Figure 3 and Figure 4 As shown, in order to ensure that the rotating locking member 3 is installed in place, the core shaft portion 2 is provided with an exhaust port 203 connected to the rotating groove 204, through which the air resistance generated when the rotating portion 301 is inserted into the rotating groove 204 and fits therewith is discharged.

[0025] like Figure 6 As shown, a limiting plate 402 is formed on the outer side of the driving portion 401 of the floating block 4 to limit the floating block 4 from completely moving out of the radial sliding hole 202. The limiting plate 402 can prevent the floating block 4 from sliding off when the shaft sleeve is installed or removed.

[0026] When implementing the technical solution, the core shaft base 1 is clamped in the chuck of the processing lathe, and the sleeve 5 to be processed is sleeved on the core shaft part 2. Due to the cooperation between the rotating part 301 and the rotating groove 204, the rotary locking piece 3 is located at the axis of the rotating cavity 201, and the rotary locking piece 3 is rotated along the C direction until the inner arc surface 303 of the wedge-shaped locking part 302 cooperates with the driving part 401. At this time, the outer arc surface of the floating plate is in tight contact with the inner side of the sleeve 5 to be processed, and the chuck is driven to rotate to cut the upper end surface of the sleeve 5 to be processed. After the processing is completed, the rotary locking piece 3 is rotated in the opposite direction, and the force between the floating block 4 and the sleeve to be processed is released. The sleeve 5 to be processed is taken out and turned 180° to be sleeved on the core shaft part 2, and the lower end surface of the sleeve 5 to be processed is cut.

Claims

1. Parallel sleeve end surface processing tooling, characterized in that: It includes a core shaft base for clamping a chuck, a floating block and a rotary locking piece. The front end of the core shaft base is formed with a core shaft portion for sleeve to be processed. A rotating cavity is opened in the core shaft portion, and a plurality of radial sliding holes connected with the rotating cavity are opened circumferentially on the outer wall of the core shaft portion. The rotary locking piece is rotatably installed in the rotating cavity, and the floating block is slidably installed in the radial sliding holes. A wedge-shaped locking part is formed on the rotary locking piece. When the rotary locking piece rotates, the wedge-shaped locking part drives the floating block to move outward and contact with the inner side of the sleeve to be processed.

2. The parallel sleeve end surface processing tool according to claim 1 is characterized in that: A rotation groove is formed at the bottom of the rotation cavity, and a rotation part which is gap-matched with the rotation groove is formed at the inner end of the rotation locking piece.

3. The parallel sleeve end surface processing tool according to claim 2 is characterized in that: The core shaft portion is provided with an exhaust port which is communicated with the rotation groove.

4. The parallel sleeve end surface processing tool according to any one of claims 1 to 3, characterized in that: One end of the floating block close to the rotary locking member is formed into a driving portion with an outer arc cross section, and the wedge-shaped locking portion has an inner arc surface matched with the driving portion.

5. The parallel sleeve end surface processing tool according to claim 4 is characterized in that: The rising direction of the inner arc surface is opposite to the rotation direction of the chuck.

6. The parallel sleeve end surface processing tool according to claim 5, characterized in that: The two ends of the inner arc surface are tangent to the surface of the rotary locking member and the upper edge surface of the wedge-shaped locking portion respectively.

7. The parallel sleeve end surface processing tool according to claim 4, characterized in that: A limiting plate is formed on the outer side of the driving portion of the floating block to limit the floating block from completely moving out of the radial sliding hole.

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