Cylindrical grinding machine center support device and cylindrical grinding machine

Abstract

The utility model discloses a cylindrical grinding machine center support device and a cylindrical grinding machine. The cylindrical grinding machine center support device comprises a center frame support, an oil cylinder with two open ends, and a rear end cover and a front end cover which are connected to the two sides of the oil cylinder of the center frame support in a sleeving mode respectively. The piston is slidably arranged in the sealed oil cylinder, and the front end of the piston penetrates out of the front end cover. The upper wear-resisting block support is installed at the front end of the piston, the upper wear-resisting block is installed on the upper wear-resisting block support, and the grinding face faces the side face. The first end of the lower wear-resistant block bracket is rotatably sleeved on the center frame support through a mandrel, and the second end of the lower wear-resistant block bracket is connected with the center frame support through an elastic structure. And the lower wear-resistant block is mounted on the lower wear-resistant block bracket, and the grinding surface faces upwards. During use, the side face of a to-be-ground workpiece abuts against the upper wear-resisting block, the bottom abuts against the lower wear-resisting block, and the elastic structure enables the lower wear-resisting block to be continuously attached to the to-be-ground workpiece. The support device can effectively support a to-be-ground workpiece, and the lower wear-resisting block can be continuously attached to the surface of the workpiece and conduct self-adaptive following adjustment along with the outer diameter of the workpiece.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of grinding machines, in particular to a center support device of an external grinding machine and the external grinding machine. BACKGROUND

[0002] In the field of mechanical manufacturing, as a key equipment for precision machining, the external grinding machine is widely used in the finish machining of shafts and sleeve parts. With the increasing requirements of industrial manufacturing on the geometric precision and surface quality of parts, high-precision grinding machines have become the core equipment for batch production of key parts such as precision bearings and hydraulic components by optimizing the spindle rigidity, numerical control system and thermal deformation compensation technology. However, in the machining process of slender shaft workpieces, the elastic deformation caused by factors such as cutting force, clamping stress and gravity of the workpiece is still the main bottleneck restricting the improvement of machining precision.

[0003] The center support, as an important auxiliary device of the external grinding machine, its core function is to enhance the rigidity of the workpiece through multi-point support and suppress vibration and deformation in the machining process. The traditional center support usually adopts a mechanical fixed structure, and the position of the support claw needs to be adjusted by hand before machining. Such structure has the following defects: firstly, in the continuous machining process, the workpiece may produce a slight displacement due to temperature change or cutting force fluctuation, and the fixed support cannot be adjusted in real time, resulting in an increase in the support gap and further causing machining vibration; secondly, manual adjustment depends on the experience of the operator, and it is difficult to ensure the consistency of the support position in batch machining, which may cause the decrease of the repeated positioning accuracy of the workpiece. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a center support device of an external grinding machine and the external grinding machine, wherein the center support device of the external grinding machine can effectively support the workpiece to be ground, and the grinding surface of the lower wear-resistant block can continuously adhere to the surface of the workpiece and follow the change of the outer diameter of the workpiece for adaptive adjustment, which helps to improve the machining precision.

[0005] In the first aspect, the application provides a center support device of an external grinding machine, which comprises a center support seat, a rear end cover, a front end cover, a piston, an upper wear-resistant block support, an upper wear-resistant block, a lower wear-resistant block support and a lower wear-resistant block.

[0006] The center support seat has an oil cylinder with two open ends, the rear end cover and the front end cover are respectively sleeved on the two sides of the oil cylinder of the center support seat and are in threaded sealing connection with the center support seat. The piston is slidingly arranged in the sealed oil cylinder, and at least the front end of the piston penetrates through the center hole of the front end cover, and the piston moves axially along the oil cylinder.

[0007] The upper wear block support is installed on the front end of the piston, and the upper wear block is installed on the upper wear block support with the grinding surface facing the side. The first end of the lower wear block support is rotatably sleeved on the center support seat through a core shaft, and the second end is connected with the center support seat through an elastic structure. The lower wear block is installed on the lower wear block support and is lower than the upper wear block, and the grinding surface faces upward. During use, the side of the workpiece to be ground is abutted against the grinding surface of the upper wear block, and the bottom of the workpiece to be ground is abutted against the grinding surface of the lower wear block, and the elastic structure continuously makes the grinding surface of the lower wear block adhere to the workpiece to be ground.

[0008] In an implementable scheme, the elastic structure comprises a first fixing member, a second fixing member and a spring, and the second end of the lower wear block support is lower than the first end thereof;

[0009] The first fixing member is installed on the center support seat, the second fixing member is installed on the second end of the lower wear block support, the spring connects the first fixing member and the second fixing member, and an acting force is given to the two to separate from each other.

[0010] In an implementable scheme, the grinding surface of the lower wear block is an arc surface that adheres to the surface of the workpiece to be ground, and / or the grinding surface of the upper wear block is an arc surface that adheres to the surface of the workpiece to be ground.

[0011] In an implementable scheme, when the side of the workpiece to be ground is abutted against the grinding surface of the upper wear block and the bottom is abutted against the grinding surface of the lower wear block, a radial direction of the workpiece to be ground along the vertical direction is a separation line L, the upper wear block is located at the rear side of the separation line L, the lower wear block is located at the front side of the separation line L, and the grinding surface of the lower wear block adheres to the wall surface of the front lower part of the workpiece to be ground.

[0012] In an implementable scheme, the lower wear block comprises a fixed part and a grinding part, the fixed part is installed on the lower wear block support, the grinding part is pivotally connected to the fixed part, and a locking member is arranged at the pivot connection position.

[0013] In an implementable scheme, the center support device of the cylindrical grinder further comprises an adjusting structure, the adjusting structure comprises a threaded rod and a support ring installed on the center hole of the rear end cover, the support ring has an internal thread, the threaded rod is matched with the internal thread of the support ring, and the threaded rod is connected with the rear end of the piston. The threaded rod is rotated to realize the axial movement of the piston in the oil cylinder.

[0014] In an implementable scheme, a sealing groove is arranged at the threaded connection position of the rear end cover and the front end cover and the center support seat, and a sealing ring is installed in the sealing groove.

[0015] In an implementable scheme, the upper wear block support is installed on the front end of the piston in a manner that the position can be adjusted along the vertical direction.

[0016] In an implementable solution, the lower wear block support is rotatably connected with the core shaft of the center support base, and is installed on the center support base in a manner that can be adjusted in the transverse direction.

[0017] In a second aspect, the application provides an external grinding machine, which comprises the aforementioned center support device of the external grinding machine, and the center support base of the center support device of the external grinding machine is installed on the frame of the external grinding machine.

[0018] Compared with the prior art, the application has at least the following beneficial effects: in the center support device of the external grinding machine of the application, the first end of the lower wear block support is rotatably sleeved on the center support base through a core shaft, so that the lower wear block support has the ability to rotate, thereby adapting to different diameters of the workpiece to be ground. At the same time, under the action of the elastic structure, the grinding surface of the lower wear block installed on the lower wear block support can continuously adhere to the workpiece to be ground, so that the grinding surface of the lower wear block can adjust to the change of the diameter of the workpiece, and the support and grinding gap can be controlled within a small range, which can significantly reduce the grinding processing vibration. Moreover, the structure that the lower wear block continuously adheres to the workpiece and adjusts can ensure the consistency of the support position in batch processing, improve the accuracy of repeated positioning, and further improve the accuracy consistency of batch processing. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0020] Figure 1 It is a structure diagram of a first center support device of an external grinding machine according to an embodiment of the application.

[0021] Figure 2 It is a structure diagram of a second center support device of an external grinding machine according to an embodiment of the application.

[0022] Figure 3 It is a structure diagram of a third center support device of an external grinding machine according to an embodiment of the application.

[0023] Figure 4 It is a partial enlarged view of a lower wear block mounting structure according to an embodiment of the application.

[0024] In the figure: 1, center frame support; 1001, oil cylinder; 2, rear end cover; 3, front end cover; 4, piston; 5, upper wear block support; 6, lower wear block support; 61, mandrel; 7, vertical adjusting piece; 8, transverse adjusting piece; 9, upper wear block; 10, lower wear block; 101, fixed part; 102, grinding part; 103, locking piece; 11, limiting piece; 12, elastic structure; 121, first fixing piece; 122, second fixing piece; 123, spring; 13, adjusting structure; 131, threaded rod; 132, support ring; 14, workpiece to be ground. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0027] As Figure 1 shown, the embodiments of the present application provide a center support device of an external cylindrical grinding machine, which comprises a center frame support 1, a rear end cover 2, a front end cover 3, a piston 4, an upper wear block support 5, an upper wear block 9, a lower wear block support 6 and a lower wear block 10.

[0028] Among them, the center frame support 1 has an oil cylinder 1001 with both ends open, the rear end cover 2 and the front end cover 3 are respectively sleeved on both sides of the oil cylinder 1001 of the center frame support 1 and are in threaded sealing connection with the center frame support 1. The piston 4 is slidingly arranged in the sealed oil cylinder 1001, and at least the front end of the piston 4 penetrates through the center hole of the front end cover 3, and the piston 4 moves axially along the oil cylinder 1001.

[0029] The upper wear block support 5 is installed on the front end of the piston 4, and the upper wear block 9 is installed on the upper wear block support 5, with the grinding surface facing the side. The first end of the lower wear block support 6 is rotatably sleeved on the center support base 1 through a core shaft 61, and the second end is connected to the center support base 1 through the elastic structure 12. The lower wear block 10 is installed on the lower wear block support 6 and is lower than the upper wear block 9, with the grinding surface facing upward. In use, the side of the workpiece to be ground is abutted against the grinding surface of the upper wear block 9, and the bottom of the workpiece to be ground is abutted against the grinding surface of the lower wear block 10, and the elastic structure 12 continuously presses the grinding surface of the lower wear block 10 to the workpiece to be ground.

[0030] In the center support device of the cylindrical grinder of the present application, the first end of the lower wear block support 6 is rotatably sleeved on the center support base 1 through a core shaft 61, so that the lower wear block support 6 has the ability to rotate, thereby adapting to different outer diameters of the workpiece 14 to be ground. At the same time, under the action of the elastic structure 12, the grinding surface of the lower wear block 10 installed on the lower wear block support 6 is continuously pressed to the workpiece 14 to be ground, so that the grinding surface of the lower wear block 10 can adjust to the change of the outer diameter of the workpiece, and the support and grinding gap is controlled within a small range, which can significantly reduce the grinding processing vibration. Moreover, the structure of the lower wear block 10 continuously pressing the workpiece and adjusting can ensure the consistency of the support position in batch processing, improve the accuracy of repeated positioning, and further improve the accuracy consistency of batch processing.

[0031] In an embodiment, as shown in Figure 1 the elastic structure 12 can include a first fixing member 121, a second fixing member 122, and a spring 123, and the second end of the lower wear block support 6 is lower than the first end. The first fixing member 121 is installed on the center support base 1, and the second fixing member 122 is installed on the second end of the lower wear block support 6. The spring 123 connects the first fixing member 121 and the second fixing member 122 and gives them a separating force, so that the grinding surface of the lower wear block 10 has a tendency to continuously press the workpiece to be ground.

[0032] In an embodiment, as shown in Figure 1 the grinding surface of the lower wear block 10 can be an arc surface that is in contact with the surface of the workpiece to be ground, and / or the grinding surface of the upper wear block 9 is an arc surface that is in contact with the surface of the workpiece to be ground.

[0033] In an embodiment, as shown in Figure 1As shown, when the workpiece to be ground abuts against the grinding surface of the upper wear block 9 on the side position and abuts against the grinding surface of the lower wear block 10 on the bottom, the upper wear block 9 is located at the rear side of the dividing line L along the vertical direction of the workpiece to be ground, the lower wear block 10 is located at the front side of the dividing line L, and the grinding surface of the lower wear block 10 is in contact with the wall surface of the lower middle part of the front side of the workpiece to be ground. Thus, the lower wear block 10 can effectively support the workpiece, and the lower wear block 10 and the upper wear block 9 form a layout of approximately right angle, so that the workpiece can be ground more effectively and quickly.

[0034] In an embodiment, as shown in Figure 4 the lower wear block 10 can include a fixed part 101 and a grinding part 102, the fixed part 101 is installed on the lower wear block support 6, and the grinding part 102 is pivotally connected to the fixed part 101, and a locking member 103 is arranged at the pivot connection position. If the workpiece surface cannot be well fitted by rotating the lower wear block support 6 around the core shaft 61, the locking member 103 can be loosened, and then the grinding part 102 is rotated to the appropriate angle relative to the fixed part 101, and then the locking member 103 is locked.

[0035] In an embodiment, as shown in Figure 1 the outer cylindrical grinding machine center support device can further include an adjusting structure 13, which includes a threaded rod 131 and a support ring 132 installed on the center hole of the rear end cover 2, the support ring 132 has an internal thread, the threaded rod 131 is matched with the internal thread of the support ring 132, and the threaded rod 131 is connected with the rear end of the piston 4. Rotating the threaded rod 131 can realize the axial movement of the piston 4 in the oil cylinder 1001, so as to adjust the grinding amount and adapt to the grinding of workpieces with different outer diameters.

[0036] In an embodiment, as shown in Figure 1 the threaded connection between the rear end cover 2 and the front end cover 3 and the center support 1 is provided with a sealing groove, and a sealing ring (not labeled in the figure) is installed in the sealing groove.

[0037] In an embodiment, as shown in Figure 2 the upper wear block support 5 is installed on the front end of the piston 4 in a manner that the position can be adjusted along the vertical direction, so as to use more outer diameter size circular workpieces. For example, the upper wear block support 5 can be installed on the front end of the piston 4 through a vertical adjusting member 7, and the vertical adjusting member 7 can have a vertical slot extending along the vertical direction, and the upper wear block support 5 can move in position along the vertical slot of the vertical adjusting member 7 and be locked in position.

[0038] In an embodiment, as shown in Figure 3As shown, the lower wear block support 6 is rotatably connected with the core shaft 61 of the center support base 1, which can be installed on the center support base 1 in a position-adjustable manner along the transverse direction. For example, the front end of the center support base 1 can be provided with a transverse adjustment member 8, which can have a transversely extending transverse groove, and the core shaft 61 can move in position along the transverse groove of the transverse adjustment member 8 and be locked in position.

[0039] In an embodiment, as shown, a limiting member 11 is arranged in the oil cylinder 1001, and a transversely extending groove is arranged on the piston 4, and the limiting member 11 is arranged in the transversely extending groove, so as to limit the maximum distance of the forward and backward movement of the piston 4. Figure 1

[0040] The embodiment of the present application also provides an external grinding machine, which comprises the center support device of the external grinding machine, and the center support base 1 of the center support device of the external grinding machine is installed on the rack of the external grinding machine.

[0041] The above only describes some embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. An external cylindrical grinder center rest device characterized by, The utility model relates to a center frame support (1) with a two-end open oil cylinder (1001), a rear end cover (2) and a front end cover (3) respectively sleeved on both sides of the oil cylinder (1001) of the center frame support (1) and in threaded sealing connection with the center frame support (1), a piston (4) slidingly arranged in the sealed oil cylinder (1001) and at least the front end of the piston (4) penetrating through the center hole of the front end cover (3), the piston (4) moving axially along the oil cylinder (1001), an upper wear block support (5) mounted on the front end of the piston (4), an upper wear block (9) mounted on the upper wear block support (5) with the grinding surface facing the side, a lower wear block support (6) with the first end rotatably sleeved on the center frame support (1) through a core shaft (61) and the second end connected with the center frame support (1) through elastic structure (12), a lower wear block (10) mounted on the lower wear block support (6) and with the height lower than that of the upper wear block (9) and the grinding surface facing upward, in use, the side position of the workpiece to be ground abuts against the grinding surface of the upper wear block (9) and the bottom of the workpiece to be ground abuts against the grinding surface of the lower wear block (10), the elastic structure (12) continuously makes the grinding surface of the lower wear block (10) adhere to the workpiece to be ground. The elastic structure (12) comprises a first fixing member (121), a second fixing member (122) and a spring (123), the second end of the lower wear block support (6) is lower than the first end; The first fixing member (121) is mounted on the center frame support (1), the second fixing member (122) is mounted on the second end of the lower wear block support (6), and the spring (123) connects the first fixing member (121) and the second fixing member (122) and gives the two a separating force. The grinding surface of the lower wear block (10) is an arc surface adhering to the surface of the workpiece to be ground, and / or the grinding surface of the upper wear block (9) is an arc surface adhering to the surface of the workpiece to be ground. When the side position of the workpiece to be ground abuts against the grinding surface of the upper wear block (9) and the bottom abuts against the grinding surface of the lower wear block (10), the upper wear block (9) is located on the rear side of the dividing line L, the lower wear block (10) is located on the front side of the dividing line L, and the grinding surface of the lower wear block (10) adheres to the wall surface of the front side middle and lower part of the workpiece to be ground. The lower wear block (10) comprises a fixed part (101) and a grinding part (102), the fixed part (101) is mounted on the lower wear block support (6), and the grinding part (102) is pivotally connected to the fixed part (101) and provided with a locking member (103) at the pivot connection position. ​ ​ ​ 2. The center rest device of claim 1, wherein ​ ​ 3. The center rest device of claim 2, wherein ​ 4. The center rest device of an external cylindrical grinder according to any one of claims 1 to 3, characterized by ​ 5. The center rest device for an external cylindrical grinder according to claim 4, characterized in that, ​ 6. The center rest apparatus of claim 1, wherein, Further comprising an adjusting structure (13) including a threaded rod (131) and a supporting ring (132) installed on the center hole of the rear end cover (2), the supporting ring (132) having an inner thread, the threaded rod (131) cooperating with the inner thread of the supporting ring (132), and the threaded rod (131) being connected with the rear end of the piston (4), and rotating the threaded rod (131) to realize the axial movement of the piston (4) in the oil cylinder (1001).

7. The center rest apparatus of claim 1, wherein, The rear end cover (2) and the front end cover (3) are provided with sealing grooves at the threaded connection with the center support seat (1), and sealing rings are installed in the sealing grooves.

8. The center rest apparatus of claim 1, wherein, The upper wear block support (5) is installed on the front end of the piston (4) in a vertically adjustable position.

9. The center rest apparatus of claim 1, wherein, The lower wear block support (6) is installed on the center support seat (1) in a laterally adjustable position through the rotating connection of the mandrel (61) with the center support seat (1).

10. An external cylindrical grinding machine, characterized by The center support seat (1) of the center support device of the external cylindrical grinder is installed on the rack of the external cylindrical grinder.

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