CN211841257U

CN211841257U - Center hole grinding machine for precision grinding

Info

Publication number: CN211841257U
Application number: CN202020213664.7U
Authority: CN
Inventors: 谢安华; 樊世建
Original assignee: Chongqing Baike Precision Machinery Co ltd
Current assignee: Chongqing Baike Precision Machinery Co ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2020-11-03
Anticipated expiration: 2030-02-26

Abstract

The utility model relates to a grinder technical field, specifically speaking relates to a centre bore that can be used to precision grinding grinds machine, including the workstation, the top of workstation is provided with the backup pad, and top one side of backup pad is provided with the fixing base, and the top of fixing base is provided with stepless speed regulating motor, and the top opposite side of backup pad is provided with feed mechanism, and the inside through-hole of seting up the level and setting up of fixing base is provided with the pivot in the through-hole, and the fixing base is worn out and be connected with the carousel to the one end of pivot, and the carousel passes through belt drive with. The utility model discloses a design is driven the gyration dish by the belt, and the carousel drives the work piece rotatory, and the top irrotational of first grinding, manual rotation hand dish, the second grind top give the certain pressure grinding centre bore of work piece, and the centre bore of the accurate work piece of suitable coping quench hardening can effectively reduce the error, improves both ends centre bore axial lead coincidence, and the circularity of centre bore.

Description

Center hole grinding machine for precision grinding

Technical Field

The utility model relates to a grinder technical field, specifically speaking relates to a centre bore grinds machine that can be used to precision grinding.

Background

The design benchmark of the excircle surface of the shaft part is an axial lead, in order to ensure the processing precision, the principle of benchmark coincidence and benchmark unification is followed, the positioning benchmark on the workpiece is selected as the axial lead of the shaft part, a central hole is generally used as the positioning benchmark for grinding each excircle, the workpiece is positioned and clamped through the central hole, the contact quality of the central hole and the workpiece has direct influence on the processing precision of the workpiece, therefore, the central hole is frequently required to be repaired and ground in the grinding process, the traditional grinding method is to clamp a hard alloy grinding tip on a lathe chuck, the workpiece is propped between the grinding tip and the lathe tailstock, and the grinding is carried out by means of the rotation of a lathe spindle, and the defects of the mode are that: the coincidence of the axes of the central holes at the two ends is not ideal, and the roundness of the central holes is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centre bore that can be used to precision grinding grinds machine to solve the problem that proposes among the above-mentioned background art.

In order to realize the aim, the utility model provides a center hole grinding machine for precision grinding, which comprises a workbench, wherein the top of the workbench is provided with a supporting plate, one side of the top of the supporting plate is provided with a fixed seat, the top of the fixed seat is provided with a stepless speed regulating motor, the other side of the top of the supporting plate is provided with a feeding mechanism, the inside of the fixed seat is provided with a through hole which is horizontally arranged, a rotating shaft is arranged in the through hole, one end of the rotating shaft penetrates out of the fixed seat and is connected with a rotating disc, the rotating disc is connected with the output end of the stepless speed regulating motor through belt transmission, one end of the rotating shaft, which is far away from the rotating disc, penetrates out of the fixed seat and is connected with a rotary disc, the axle center of the rotary disc rotates through a bearing and, the grinding center is characterized in that a movable grinding center sleeve is arranged in the fixed block in a hollow and sliding mode, a threaded hole is formed in the movable grinding center sleeve, a lead screw is connected to the inner portion of the movable grinding center sleeve in a threaded mode, a second grinding center is arranged at one end, close to a workpiece, of the movable grinding center sleeve in a welded mode, one end, away from the second grinding center, of the lead screw is connected with a hand-cranking disc, and taper sleeves are sleeved on the outer walls of the first grinding center and the second grinding center.

Preferably, the center holes are formed in the axle centers of the two ends of the workpiece, and the first grinding tip and the second grinding tip are both fixed non-rotating structures.

Preferably, a handle is mounted on the outer side of the hand-cranking plate.

Preferably, the screw rod is connected with the inner wall of the fixing block in a rotating mode through the plane bearing, and the screw rod is connected with the cover plate on the fixing block in a rotating mode through the plane bearing.

Preferably, the outer side wall of the rotary disc is provided with a deflector rod, the deflector rod is fixedly connected with the rotary disc through a bolt, and then the workpiece is carried by a machine core on the workpiece to rotate.

Preferably, the first and second grinding tips are both tapered.

Preferably, the two sides of the top of the supporting plate are respectively provided with a lifting pad at the bottom of the fixed seat and the bottom of the feeding mechanism, and the fixed seat and the feeding mechanism are on the same horizontal plane and the same axial line.

Compared with the prior art, the beneficial effects of the utility model are that:

according to the grinder capable of precisely grinding the center hole, the first grinding tip and the second grinding tip are mounted on the taper sleeve and the feeding mechanism of the same axial lead, when grinding is conducted, the rotary disc is driven by the belt, the rotary disc drives the workpiece to rotate, the first grinding tip does not rotate, the hand-operated disc is manually rotated, the screw rod is adopted for feeding, the second grinding tip gives a certain pressure to the workpiece to grind the center hole, the grinder is suitable for grinding the center hole of the hardened precise workpiece, errors can be effectively reduced, and the coincidence of the axial leads of the center holes at two ends and the roundness of the center hole are improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic structural diagram of the middle feeding mechanism of the present invention.

In the figure: 1. a work table; 2. a support plate; 21. raising the pad; 3. a stepless speed regulating motor; 31. a belt; 4. a fixed seat; 41. a through hole; 42. a rotating shaft; 421. a turntable; 43. a taper sleeve; 44. a rotary disk; 44. a deflector rod; 45. a first grinding tip; 5. a workpiece; 51. a central bore; 6. a feed mechanism; 61. a fixed block; 62. moving the grinding center sleeve; 63. a screw rod; 64. a second grinding tip; 65. a hand-operated tray; 66. a handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The utility model provides a center hole grinding machine for precision grinding, as shown in figure 1-figure 3, comprising a workbench 1, a support plate 2 is arranged on the top of the workbench 1, a fixed seat 4 is arranged on one side of the top of the support plate 2, a stepless speed regulating motor 3 is arranged on the top of the fixed seat 4 for speed regulation, a feeding mechanism 6 is arranged on the other side of the top of the support plate 2 for feeding grinding, a through hole 41 horizontally arranged is arranged in the fixed seat 4, a rotating shaft 42 is arranged in the through hole 41, one end of the rotating shaft 42 penetrates out of the fixed seat 4 and is connected with a rotating disc 421 in an assembling way, the rotating disc 421 is connected with the output end of the stepless speed regulating motor 3 through a belt 31 in a transmission way, the rotating disc 421 is driven to rotate through the stepless speed regulating motor 3, the rotating shaft 42 is driven to rotate, one, the axis of the rotary disk 44 rotates through a bearing and is connected with a first grinding center 45, the rotary disk 44 at one end is driven to rotate when the rotary shaft 42 rotates, a workpiece 5 is arranged between the fixed seat 4 and the feeding mechanism 6, the feeding mechanism 6 comprises a fixed block 61, a movable grinding center sleeve 62 is arranged in the fixed block 61 in a hollow and sliding mode, a threaded hole is formed in the movable grinding center sleeve 62 and is connected with a lead screw 63 through a thread, a second grinding center 64 is arranged at one end, close to the workpiece 5, of the movable grinding center sleeve 62, a hand-cranking disk 65 is arranged at one end, far away from the second grinding center 64, of the lead screw 63, the outer walls of the first grinding center 45 and the second grinding center 64 are both sleeved with a taper sleeve 43, and the lead screw 63 is driven to rotate through the rotation of, and then the movable grinding center sleeve 62 moves to drive the second grinding center 64 to move, so that the central hole 51 of the workpiece 5 is ground.

Specifically, the center holes 51 are formed at the axes of the two ends of the workpiece 5, so that the first grinding tip 45 and the second grinding tip 64 can be aligned with the two ends of the workpiece.

In addition, a handle 66 is connected to the outer side of the hand-cranking plate 65, so that the hand-cranking plate 65 can be conveniently driven to rotate by hand holding.

Further, the screw rod 63 rotates and is connected with the inner wall of the fixing block 61 through a bearing, the plane bearing is connected with a cover plate on the fixing block 61, the hand-operated disc is rotated, the screw rod rotates, and when the grinding center sleeve moves forwards or backwards, the screw rod 63 is guaranteed to rotate stably and cannot move forwards and backwards.

Further, a driving lever 441 is mounted on the outer side wall of the rotary disc 44, the driving lever 441 is fixedly connected with the rotary disc 44 through a bolt and rotates synchronously with the rotary disc 44, the driving lever 441 pushes a core clamp mounted on a workpiece, and the core clamp drives the workpiece to rotate and grind.

Further, the first grinding tip 45 and the second grinding tip 64 are both tapered structures for easy fixation within the taper sleeve 43.

Further, the top both sides of backup pad 2 are located the bottom of fixing base 4 and feed mechanism 6 and all are provided with and raise pad 21, and fixing base 4 and feed mechanism 6 are on same horizontal plane and same axis, guarantee fixing base 4 and feed mechanism 6's stability.

When the center hole grinding machine for precision grinding is used, firstly, the stepless speed regulating motor 3 is externally connected with a power supply to enable the machine to work, the belt 31 drives the rotary disc 44 to rotate, the first grinding center does not rotate, a hand holds the machine on the handle 66, the hand-operated rotary disc 65 is manually rotated, the grinding center sleeve 62 is moved and fed through the rotation of the screw rod 63, the second grinding center 64 gives a certain pressure to the workpiece 5, so that the center hole 51 is ground, the center hole 51 of the hardened precision workpiece 5 is ground appropriately, the machining error of the center hole can be effectively reduced, and the center hole axis coincidence degree of two ends and the roundness of the center hole are improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A centre hole grinder for precision grinding, comprising a table (1), characterized in that: the top of the workbench (1) is provided with a supporting plate (2), one side of the top of the supporting plate (2) is provided with a fixed seat (4), the top of the fixed seat (4) is provided with a stepless speed regulating motor (3), the other side of the top of the supporting plate (2) is provided with a feeding mechanism (6), a through hole (41) which is horizontally arranged is formed in the fixed seat (4), a rotating shaft (42) is arranged in the through hole (41), one end of the rotating shaft (42) penetrates out of the fixed seat (4) and is connected with a rotating disc (421), the rotating disc (421) is in transmission connection with the output end of the stepless speed regulating motor (3) through a belt (31), one end of the rotating shaft (42) far away from the rotating disc (421) penetrates out of the fixed seat (4) and is connected with a rotating disc (44), the axis of the rotating disc (, the feeding mechanism (6) comprises a fixed block (61), a movable grinding center sleeve (62) is arranged in the fixed block (4) in a hollow mode and slidably arranged in the fixed block (61), a threaded hole is formed in the movable grinding center sleeve (62) and is connected with a screw rod (63) through threads, a second grinding center (64) is closely welded and installed at one end, close to the workpiece (5), of the movable grinding center sleeve (62), the other end, far away from the second grinding center (64), of the screw rod (63) is connected with a hand-cranking disc (65), and taper sleeves (43) are sleeved on the outer walls of the first grinding center (45) and the second grinding center (64).

2. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: the center holes (51) are formed in the axle centers of two ends of the workpiece (5), and the first grinding tip (45) and the second grinding tip (64) are both of a fixed type non-rotating structure.

3. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: the outer side of the hand-cranking plate (65) is connected with a handle (66).

4. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: the screw rod (63) is connected with the cover plate on the fixing block (61) in a rotating mode through a plane bearing.

5. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: and a driving lever (441) is installed on the outer side wall of the rotary disc (44), the driving lever (441) is fixedly connected with the rotary disc (44) through a bolt, and then the workpiece is driven to rotate by a machine core on the workpiece.

6. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: the first grinding tip (45) and the second grinding tip (64) are both conical structures.

7. The center hole grinder usable for precision grinding as claimed in claim 1, wherein: the bottom that the top both sides of backup pad (2) are located fixing base (4) and feed mechanism (6) all is provided with raises pad (21), fixing base (4) and feed mechanism (6) are at same horizontal plane, same axial lead.