Shaft part cylindrical grinding tool for cylindrical grinding machine

Abstract

The shaft part cylindrical grinding tool for the cylindrical grinding machine comprises an installation base capable of being installed on a main shaft of the grinding machine and further comprises a lengthening rod, a one-way bearing and a positioning ring, the lengthening rod is coaxially and fixedly connected to the installation base, an inner ring of the one-way bearing is coaxially and fixedly connected to the lengthening rod, and the inner ring of the one-way bearing is coaxially and fixedly connected to the positioning ring. The positioning ring is detachably connected to the outer ring of the one-way bearing, the positioning ring is provided with a positioning block capable of being matched with a flower groove in the shaft part, and when the shaft part is clamped on the cylindrical grinding machine, the positioning block is matched with the flower groove in the shaft part. When the shaft part is clamped on the cylindrical grinding machine, the positioning ring is matched with the flower groove, the two ends of the shaft part are limited through the center on the cylindrical grinding machine and the positioning ring respectively, the peripheral face of the shaft part is not shielded, grinding of the peripheral face of the shaft part can be formed at a time, and therefore the grinding coaxiality of the peripheral face of the shaft part is guaranteed, and the grinding efficiency of the shaft part is improved. And the clamping frequency during machining of the outer circumferential surface of the shaft part is reduced, so that the machining efficiency during machining of the shaft part is improved.

Description

Technical Field

[0001] This utility model relates to the field of shaft parts processing technology, and in particular to a cylindrical grinding fixture for shaft parts for a cylindrical grinding machine. Background Technology

[0002] Shaft parts are one of the typical parts frequently encountered in machines. Cylindrical grinding machines are used to grind the outer surface and shoulder end face of shaft parts. They are generally composed of a cast iron bed as the base, a worktable, a headstock and tailstock that support and drive the workpiece rotation, a grinding wheel head that mounts the grinding wheel, a transverse feed mechanism that controls the size of the workpiece being ground, and electrical and hydraulic devices that control the movement of the machine tool's moving parts. When grinding a workpiece, it is first necessary to fix the workpiece with a fixture. In the existing technology, shaft parts are often processed by a three-jaw chuck or a four-jaw chuck to process the blank.

[0003] like Figure 5 The shaft part 6 shown has a mounting hole 61 at one end along its axis, and a groove 62 inside the hole. If the shaft part is clamped by a three-jaw chuck or a four-jaw chuck, this clamping method will cover the outer circumferential surface of the shaft part. When grinding the outer circle of the shaft part, one end of the workpiece needs to be ground before turning it over to grind the other end. This causes the two ends of the shaft part to be processed separately, which will affect the coaxiality of the two ends of the outer circumferential surface of the shaft. This results in low processing efficiency for the outer circle of the shaft part and also affects the processing accuracy. Utility Model Content

[0004] To facilitate the grinding of the outer circumferential surface of shaft parts, this application provides a cylindrical grinding fixture for shaft parts for an external cylindrical grinding machine.

[0005] The technical solution provided in this application for a cylindrical grinding fixture for shaft parts is as follows:

[0006] A cylindrical grinding fixture for shaft parts for an external cylindrical grinding machine includes a mounting base that can be installed on the grinding machine spindle, an extension rod, a one-way bearing, and a positioning ring. The extension rod is coaxially and fixedly connected to the mounting base. The inner ring of the one-way bearing is coaxially and fixedly connected to the extension rod. The positioning ring is detachably connected to the outer ring of the one-way bearing, and the positioning ring is provided with a positioning block that can mate with a groove on the shaft part. When the shaft part is clamped on the external cylindrical grinding machine, the positioning block mates with the groove on the shaft part.

[0007] By adopting the technical scheme, when the shaft part is clamped on the cylindrical grinding machine, the positioning ring is matched with the flower groove to limit the circumferential displacement of the shaft part, and the two ends of the shaft part pass through the tailstock and the positioning ring on the cylindrical grinding machine to limit the displacement in the axial direction of the shaft part, so that the shaft part is clamped on the cylindrical grinding machine, the outer circumferential surface of the shaft part is not shielded, the grinding of the outer circumferential surface of the shaft part can be formed at one time, the coaxiality of the outer circumferential surface of the shaft part is ensured, the clamping frequency during the machining of the outer circumferential surface of the shaft part is reduced, and the machining efficiency of the shaft part is improved; and the setting of the one-way bearing protects the turning of the shaft part, and facilitates the grinding of the outer circumferential surface of the shaft part.

[0008] Preferably, the diameter of the lengthened rod is smaller than the diameter of the shaft part, and the lengthened rod is tapered from the end close to the mounting seat to the end away from the mounting seat.

[0009] By adopting the technical scheme, the setting of the lengthened rod can reduce the possibility of wear of the mounting seat caused by the grinding wheel during the grinding process, and the end of the lengthened rod away from the mounting seat is tapered, so that the grinding wheel can also grind the end surface of the shaft part, to ensure the coaxiality of the end surface of the shaft part and the outer circumferential surface of the shaft part.

[0010] Preferably, the outer circumferential surface of the outer ring of the one-way bearing is provided with a plurality of limiting blocks, the plurality of limiting blocks are uniformly distributed around the outer circumferential surface of the one-way bearing, the positioning ring is provided with a plurality of limiting grooves which can be matched with the plurality of limiting blocks respectively, and the plurality of limiting blocks are matched with the plurality of limiting grooves respectively when the limiting blocks are sleeved on the one-way bearing.

[0011] By adopting the technical scheme, the circumferential position of the positioning ring on the one-way bearing is limited through the cooperation between the plurality of limiting blocks and the plurality of limiting grooves, and the possibility of slipping of the positioning ring on the one-way bearing is reduced.

[0012] Preferably, the plurality of screws are provided, one end of each of the plurality of screws passes through the positioning ring in the direction perpendicular to the axis of the one-way positioning ring, and one end of each of the plurality of screws passes through and is threadedly connected to the plurality of limiting blocks.

[0013] By adopting the technical scheme, the axial position of the positioning ring on the one-way bearing is limited through the plurality of screws passing through the positioning ring and being threadedly connected to the plurality of limiting blocks, and the one-way bearing is limited through the screws, so that the positioning ring is convenient to replace; or different positioning rings are replaced according to different shaft parts to be machined, so as to increase the versatility of the tooling.

[0014] Preferably, further comprising an abutting block, the abutting block is detachably connected on the lengthening rod, a connecting bolt is rotatably connected on the abutting block, one end of the connecting bolt is threadedly connected on the lengthening rod, when the shaft part is clamped on the lathe main body, the abutting block abuts on the bottom surface of the shaft part mounting hole.

[0015] By adopting the technical scheme, when the shaft part is clamped on the cylindrical grinding machine, the abutting block abuts on the bottom surface of the shaft part mounting hole, further limiting the displacement of the shaft part along the axial direction of the cylindrical grinding machine, and reducing the possibility of displacement of the shaft part along the axial direction after being clamped on the cylindrical grinding machine.

[0016] The technical effects of the utility model mainly embody in the following aspects:

[0017] 1. The utility model discloses a positioning ring and a one-way bearing are arranged, when the shaft part is clamped on the cylindrical grinding machine, the positioning ring is matched with the fluted groove, the circumferential displacement of the shaft part is limited, and the both ends of the shaft part are limited through the tailstock and the positioning ring on the cylindrical grinding machine, the axial displacement of the shaft part is limited, the purpose that the shaft part is clamped on the cylindrical grinding machine is achieved, the outer circumferential surface of the shaft part is not shielded, the grinding of the outer circumferential surface of the shaft part can be formed once, the coaxiality of the outer circumferential surface of the shaft part is ensured, the clamping frequency during the processing of the outer circumferential surface of the shaft part is reduced, and the processing efficiency during the processing of the shaft part is improved, and the one-way bearing is arranged and plays a protection role during the turning of the shaft part, facilitating the grinding of the outer circumferential surface of the shaft part.

[0018] 2. The utility model discloses a lengthening rod is arranged, the lengthening rod can reduce the possibility that the grinding wheel is abraded to the mounting seat during the grinding process, and the one end of the lengthening rod away from the mounting seat is gradually tapered, so that the grinding wheel can also grind the end surface of the shaft part, and the coaxiality of the end surface of the shaft part and the outer circumferential surface of the shaft part is ensured.

[0019] 3. The utility model discloses a abutting block is arranged, when the shaft part is clamped on the cylindrical grinding machine, the abutting block abuts on the bottom surface of the shaft part mounting hole, further limiting the displacement of the shaft part along the axial direction of the cylindrical grinding machine, and reducing the possibility of displacement of the shaft part along the axial direction after being clamped on the cylindrical grinding machine. ACCURATE DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the embodiment of the application.

[0021] Figure 2 It is the structure schematic diagram of the positioning ring of the embodiment of the application.

[0022] Figure 3 It is the structure schematic diagram of the state of being installed on the cylindrical grinding machine of the embodiment of the application.

[0023] Figure 4 is along Figure 3 is an enlarged view of A in

[0024] Figure 5 is a schematic view of the shaft part structure of the embodiment of the application.

[0025] Reference signs: 1, mounting seat; 11, through hole; 12, fixing bolt; 2, lengthening rod; 3, one-way bearing; 31, limiting block; 4, positioning ring; 41, positioning block; 42, screw; 43, limiting groove; 5, abutting block; 51, connecting bolt; 6, shaft part; 61, mounting hole; 62, flower groove; 7, cylindrical grinding machine; 71, center. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying Figures 1-5 The application is further described in detail to make the technical scheme of the application easier to understand and master.

[0027] The embodiment of the application discloses a shaft part cylindrical grinding tool for a cylindrical grinding machine.

[0028] With reference to Figure 1 and Figure 4 , the shaft part cylindrical grinding tool for a cylindrical grinding machine comprises a mounting seat 1 which can be installed on a grinding machine spindle, a through hole 11 is formed in the mounting seat 1, a fixing bolt 12 is arranged in the through hole 11, one end of the fixing bolt 12 is threadedly connected to the mounting seat 1, the tool further comprises a lengthening rod 2, a one-way bearing 3 and a positioning ring 4, the lengthening rod 2 is coaxial with and fixedly connected to the mounting seat 1, the diameter of the lengthening rod 2 is smaller than the diameter of the shaft part 6, and the lengthening rod 2 is tapered from the end close to the mounting seat 1 to the end away from the mounting seat 1.

[0029] With reference to Figure 1 , Figure 4 and Figure 5 , the inner ring of the one-way bearing 3 is coaxial with and fixedly connected to the end face of the end of the lengthening rod 2 away from the mounting seat 1, the positioning ring 4 is detachably connected to the outer ring of the one-way bearing 3, and the positioning ring 4 is fixedly connected with the positioning blocks 41 which can cooperate with the flower grooves 62 on the shaft part 6, when the shaft part 6 is clamped on the cylindrical grinding machine 7, the positioning blocks 41 simultaneously cooperate with the flower grooves 62 on the shaft part 6.

[0030] With reference to Figure 3 and Figure 4When the shaft part 6 is clamped on the cylindrical grinding machine 7, the positioning ring 4 is matched with the flower groove 62 to limit the circumferential displacement of the shaft part 6, and the two ends of the shaft part 6 are respectively limited by the tailstock 71 on the cylindrical grinding machine 7 and the positioning ring 4 to limit the displacement of the shaft part 6 in the axial direction, so as to achieve the purpose of clamping the shaft part 6 on the cylindrical grinding machine 7, and the outer circumferential surface of the shaft part 6 is not shielded, so that the grinding of the outer circumferential surface of the shaft part 6 can be formed at one time, so as to ensure the coaxiality of the outer circumferential surface of the shaft part 6 while reducing the clamping times during the machining of the outer circumferential surface of the shaft part 6, thereby improving the machining efficiency of the shaft part 6; the rotatable direction of the one-way bearing 3 is opposite to the rotating direction of the main shaft of the cylindrical grinding machine 7, so that the setting of the one-way bearing 3 plays a protective role in the turning of the shaft part 6, and facilitates the grinding of the outer circumferential surface of the shaft part.

[0031] With reference to Figure 1 and Figure 2 The setting of the lengthening rod 2 can reduce the possibility of wear of the mounting seat 1 caused by the grinding wheel during the grinding process, and the end of the lengthening rod 2 away from the mounting seat 1 is tapered, so that the grinding wheel can also grind the end surface of the shaft part 6, so as to ensure the coaxiality of the end surface of the shaft part 6 and the outer circumferential surface of the shaft part 6.

[0032] With reference to Figure 1 and Figure 2 A plurality of limiting blocks 31 are fixedly connected to the outer circumferential surface of the outer ring of the one-way bearing 3, the plurality of limiting blocks 31 are uniformly distributed around the outer circumferential surface of the one-way bearing 3, the positioning ring 4 is provided with a plurality of limiting grooves 43 which can be matched with the plurality of limiting blocks 31 respectively, and the plurality of limiting blocks 31 are matched with the plurality of limiting grooves 43 respectively when the positioning block 41 is sleeved on the one-way bearing 3. The cooperation between the plurality of limiting blocks 31 and the plurality of limiting grooves 43 limits the circumferential position of the positioning ring 4 on the one-way bearing 3, thereby reducing the possibility of slippage of the positioning ring 4 on the one-way bearing 3.

[0033] With reference to Figure 1 and Figure 2 Further comprising a plurality of screws 42, one end of each of the plurality of screws 42 is threaded through the positioning ring 4 in a direction perpendicular to the axis of the one-way positioning ring 4, and the one end of each of the plurality of screws 42 is threaded through the plurality of limiting blocks 31. By threading the plurality of screws 42 through the positioning ring 4 and screwing them into the plurality of limiting blocks 31, the axial position of the positioning ring 4 on the one-way bearing 3 is limited, and the one-way bearing 3 is limited by the screws 42, which facilitates the replacement of the positioning ring 4; or different positioning rings 4 are replaced according to different shaft parts 6 to be machined, so as to increase the versatility of the tooling.

[0034] With reference to Figure 1 and Figure 2Further comprising an abutting block 5, the abutting block 5 is detachably connected on the lengthening rod 2, the abutting block 5 is rotatably connected with a connecting bolt 51, one end of the connecting bolt 51 is threadedly connected on the lengthening rod 2, when the shaft part 6 is clamped on the lathe main body, the abutting block 5 abuts on the bottom surface of the shaft part 6 mounting hole 61. When the shaft part 6 is clamped on the cylindrical grinding machine 7, the abutting block 5 abuts on the bottom surface of the shaft part 6 mounting hole 61, further limiting the displacement of the shaft part 6 along the axial direction of the cylindrical grinding machine 7, reducing the possibility of the shaft part 6 clamped to the cylindrical grinding machine 7 along the axial direction.

[0035] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A shaft part cylindrical grinding tool for cylindrical grinding machine, comprising a mounting seat (1) which can be mounted on the spindle of the grinding machine, characterized in that: It also includes a lengthening rod (2), a one-way bearing (3) and a positioning ring (4), the lengthening rod (2) is coaxial and fixedly connected on the mounting base (1), the inner ring of the one-way bearing (3) is coaxial and fixedly connected on the lengthening rod (2), the positioning ring (4) is detachably connected on the outer ring of the one-way bearing (3), and the positioning ring (4) is provided with a positioning block (41) which can be matched with the groove (62) on the shaft part (6), when the shaft part (6) is clamped on the cylindrical grinding machine (7), the positioning block (41) is matched with the groove (62) on the shaft part (6).

2. The shaft part cylindrical grinding tool for cylindrical grinder according to claim 1, characterized in that: The diameter of the lengthening rod (2) is smaller than the diameter of the shaft part (6), and the lengthening rod (2) is tapered from the end close to the mounting base (1) to the end away from the mounting base (1).

3. The shaft part cylindrical grinding tool for cylindrical grinder according to claim 2, characterized in that: The outer periphery of the outer ring of the one-way bearing (3) is provided with a plurality of limiting blocks (31), a plurality of the limiting blocks (31) are uniformly distributed around the outer periphery of the one-way bearing (3), the positioning ring (4) is provided with a plurality of limiting grooves (43) which can be matched with a plurality of the limiting blocks (31) respectively, when the positioning block (41) is sleeved on the one-way bearing (3), a plurality of the limiting blocks (31) are matched with a plurality of the limiting grooves (43) respectively.

4. The shaft part cylindrical grinding tool for cylindrical grinder according to claim 2, characterized in that: It also includes a plurality of screws (42), one end of each of the plurality of screws (42) is arranged through the positioning ring (4) along the direction perpendicular to the axis of the one-way positioning ring (4), and one end of each of the plurality of screws (42) is arranged through and screwed on each of the plurality of limiting blocks (31).

5. The shaft type outer circle grinding tooling for an outer circle grinding machine according to claim 2, characterized in that: It also includes an abutting block (5), the abutting block (5) is detachably connected on the lengthening rod (2), when the shaft part (6) is clamped on the cylindrical grinding machine (7), the side surface of the abutting block (5) away from the lengthening rod (2) in the axial direction abuts on the bottom surface of the mounting hole (61) of the shaft part (6).

6. The shaft type outer circle grinding tooling for an outer circle grinding machine according to claim 5, characterized in that: The abutting block (5) is rotatably connected with a connecting bolt (51), one end of the connecting bolt (51) is arranged through the abutting block (5) and screwed on the lengthening rod (2).

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