Special clamp device for double-end-face grinding

Abstract

The invention relates to the technical field of workpiece grinding clamps, in particular to a clamp device special for double-end-face grinding. Comprising a gear motor, a motor belt pulley of the gear motor is connected with a clamp, and the clamp is detachably fixed in a clamp fixing seat; the clamp comprises a first stator, a second stator and a rotating rotor, the rotating rotor is arranged between the first stator and the second stator, the first stator, the second stator and the rotating rotor are concentrically arranged, and the rotating rotor is rotationally connected relative to the first stator and the second stator; the inner cavity of the rotating rotor can contain a workpiece, the first end face and the second end face both extend out of the outer sides of the two ends of the rotating rotor, and a limiting boss is arranged in the inner cavity and abuts against an annular protrusion of the workpiece. The rotating rotor is further provided with a centering structure, and the centripetal motion end of the centering structure is clamped on the outer side of the middle of the cylinder and can do centripetal contraction motion relative to the center of the first stator. The device is used for fixing a workpiece and driving the workpiece to rotate, meanwhile, two end faces are ground together, original grinding of each end face is replaced, and the production efficiency is doubled.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece grinding fixtures, in particular to a special fixture device for double-end surface grinding. Background Art

[0002] like Figure 1 The workpiece shown is a workpiece in production. During the processing, the left and right end faces of the workpiece need to be ground. The current production process is to grind the left end face on one device first, and then transfer the workpiece to another device to grind the right end face. This production process is time-consuming and labor-intensive. The fundamental reason for the time-consuming and labor-intensive process is that the workpiece fixtures on the two devices can only meet the grinding of one end face, resulting in doubling or even more working hours. In order to improve the grinding efficiency, it is more urgent to improve the fixture device of the workpiece so that the improved fixture device can fix the workpiece and perform rotational grinding on both end faces at the same time. If this can be achieved, production efficiency will be greatly improved. Summary of the invention

[0003] Problem to be solved: An improved workpiece clamping device is provided, which can fix the workpiece and simultaneously perform rotational grinding on two end faces.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a special clamp device for double-end face grinding, used for fixing a workpiece and driving it to rotate, the workpiece includes a first end face, a second end face, an annular convexity and a cylindrical middle part, includes a reduction motor, and a motor pulley of the reduction motor is connected to a clamp, and the clamp is detachably fixed in a clamp fixing seat; the clamp includes stator one, stator two and a rotating mover, the rotating mover is arranged between stator one and stator two, stator one, stator two and the rotating mover are concentrically arranged and the rotating mover is rotatably connected relative to stator one and stator two; the inner cavity of the rotating mover can accommodate the workpiece, the first end face and the second end face both extend outwardly from the two ends of the rotating mover, the inner cavity is provided with a limiting boss, and the limiting boss is against the annular convexity of the workpiece; the rotating mover is also provided with a centering structure, the centripetal movement end of the centering structure is clamped on the outer side of the cylindrical middle part and can perform centripetal contraction movement relative to the center of stator one.

[0005] Preferably, stator 1 and stator 2 are both annular and are respectively clamped on the outer sides of both ends of the rotating mover. The rotating mover is provided with a mover pulley protruding toward stator 1, and the mover pulley is connected to the motor pulley through a belt.

[0006] Preferably, the centripetal motion end of the centering structure is two centripetal sliders arranged in mirror symmetry, the centripetal slider is slidingly connected relative to the stator and the centripetal slider is provided with an inclined hole, an arc groove is opened on the side of the centripetal slider close to the inner cavity, the arc groove is coaxial with the stator and the radius of the arc groove is the same as the radius of the middle part of the cylinder.

[0007] Preferably, the centering structure also includes a hydraulic cylinder and a connector, and the connector integrally connects two longitudinal guide blocks, a middle connecting block and two supporting legs; the output end of the hydraulic cylinder is connected to the center of the middle connecting block, the two longitudinal guide blocks are slidably matched with the outer side of the hydraulic cylinder, and the two supporting legs are slidably matched with the two inclined holes.

[0008] Preferably, annular oil chamber 1 and annular oil chamber 2 are provided between stator 1 and the rotating rotor, and annular oil chamber 1 and annular oil chamber 2 are respectively connected to the upper oil chamber and lower oil chamber of the hydraulic cylinder, and stator 1 is provided with an oil filling port corresponding to annular oil chamber 1 and annular oil chamber 2.

[0009] Preferably, three annular sealing grooves are provided on the rotating mover, and the three annular sealing grooves are arranged around the annular oil chamber 1 and the annular oil chamber 2 for accommodating sealing rings.

[0010] Preferably, the rotating rotor is further provided with small hole 1 and small hole 2, small hole 1 connects annular oil chamber 1 and the upper oil chamber of the hydraulic cylinder, and small hole 2 connects annular oil chamber 2 and the lower oil chamber of the hydraulic cylinder.

[0011] Preferably, the fixture fixing seat comprises a detachably connected lower base and an upper clamping seat, and both the lower base and the upper clamping seat are provided with a semicircular groove with the same radius, and the radius of the semicircular groove is greater than the rotation radius of the rotating mover.

[0012] Compared with the prior art, the present invention provides a special clamping device for double-end surface grinding, which has the following beneficial effects: the inner cavity clamps the workpiece and simultaneously completes the transverse positioning of the workpiece through the limiting boss, and then determines the rotation axis of the workpiece; the centripetal slider is used to clamp and release the workpiece through the hydraulic cylinder and the connecting body, and the centering structure clamps the workpiece by driving the rotating mover to rotate through the external reduction motor, thereby ensuring the rotation of the workpiece; since both end faces of the workpiece can cooperate with the grinding wheel, the two end faces can be ground together at the same time, instead of grinding each end face separately, thereby doubling the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the workpiece structure involved in the present invention;

[0014] Figure 2 It is a structural schematic diagram of the device of the present invention;

[0015] Figure 3 A schematic diagram of the fixture structure according to the present invention;

[0016] Figure 4 This is a schematic diagram of the centering structure involved in the present invention;

[0017] Figure 5 It is a cross-sectional schematic diagram of the clamp involved in the present invention;

[0018] Figure 6This is a diagram showing the coordination of the rotating mover and the stator involved in the present invention;

[0019] Figure 7 This is a schematic diagram of the structure of the centripetal slider involved in the present invention;

[0020] Figure 8 This is a schematic diagram of the connector structure involved in the present invention;

[0021] Explanation of the reference numerals in the accompanying drawings: 1. stator 1; 11. annular oil chamber 1; 12. annular oil chamber 2; 2. stator 2; 3. rotating mover; 31. inner cavity; 311. limiting boss; 32. mover pulley; 33. annular sealing groove; 34. small hole 1; 35. small hole 2; 4. workpiece; 41. first end face; 42. second end face; 43. annular convexity; 44. middle part of cylinder; 5. reduction motor; 51. motor pulley; 6. fixture; 7. centering structure; 71. centripetal slider; 711. inclined hole; 712. arc groove; 72. connector; 721. longitudinal guide block; 722. middle connecting block; 723. support foot; 73. hydraulic cylinder; 8. fixture fixing seat; 81. lower base; 82. upper clamping seat. DETAILED DESCRIPTION

[0022] The technical solution in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0023] As shown in the figure, Figure 1It is a structural schematic diagram of a workpiece 4, which mainly includes a first end face 41, a second end face 42, an annular protrusion 43 and a cylindrical middle part 44. The first end face 41 and the second end face 42 are the faces to be ground, that is, the first end face 41 and the second end face 42 need to be exposed on both sides of a fixture 6, and the fixture device is used to fix the workpiece 4 and drive the workpiece 4 to rotate. The special fixture device for double-end face grinding of the present invention includes a reduction motor 5, a motor pulley 51 of the reduction motor 5 is connected to the fixture 6, and the fixture 6 is detachably fixed in the fixture fixing seat 8; the fixture 6 includes a stator 1, a stator 2 and a rotating mover 3, and the rotating mover 3 is arranged between the stator 1 and the stator 2, and the axis of the stator 1 and the stator 2 is the same as the rotation axis of the rotating mover 3, and the stator 1 and the stator 2 are fixed to the fixture fixing seat 8 by bolts to realize the detachable connection between the fixture 6 and the fixture fixing seat 8, and the rotating mover 3 rotates relative to the fixture fixing seat 8. The clamp fixing seat 8 includes a lower base 81 and an upper clamping seat 82 which are detachably connected. The lower base 81 and the upper clamping seat 82 are both provided with a semicircular groove with the same radius. The radius of the semicircular groove is larger than the rotation radius of the rotating mover 3. During installation, the clamp 6 is first placed in the semicircular groove of the lower base 81, and then the upper clamping seat 82 is installed in place, and the stator 1 1 and the stator 2 2 are fixed to the clamp fixing seat 8. The stator 1 1 and the stator 2 2 are both annular and are respectively clamped on the outer sides of the two ends of the rotating mover 3. The rotating mover 3 is provided with a mover pulley 32 protruding toward the direction of the stator 1 1. The mover pulley 32 is connected to the motor pulley 51 through a belt. The reduction motor 5 is started to drive the motor pulley 51 to rotate, and the motor pulley 51 drives the mover pulley 32 to rotate through the belt, thereby realizing the rotational movement of the rotating mover 3 and the workpiece 4. The rotating mover 3 can rotate with the workpiece 4 because the inner cavity 31 of the rotating mover 3 can accommodate the workpiece 4. The internal shape of the inner cavity 31 is similar to the shape of the workpiece 4. The first end face 41 and the second end face 42 both extend outward from the two ends of the rotating mover 3. The inner cavity 31 is provided with a limiting boss 311, and the limiting boss 311 is against the annular convex 43 of the workpiece 4; the rotating mover 3 is also provided with a centering structure 7, which includes a centripetal slider 71, a connector 72 and a hydraulic cylinder 73. The centripetal slider 71 is connected to the connector 72 is connected to the hydraulic cylinder 73; the centripetal motion end of the centering structure 7 is clamped on the outer side of the middle part 44 of the cylinder and can perform centripetal contraction motion or centrifugal diffusion motion relative to the center of the stator 1; two centripetal sliders 71 arranged in mirror symmetry serve as the centripetal motion end of the centering structure 7, and the centripetal sliders 71 include an inclined hole 711 and an arc groove 712. The arc groove 712 is opened on a side close to the inner cavity 31, and the arc groove 712 is coaxial with the stator 1 and the radius of the arc groove 712 is the same as the radius of the middle part 44 of the cylinder.The connecting body 72 includes two longitudinal guide blocks 721, a middle connecting block 722 and two supporting legs 723. The two longitudinal guide blocks 721, the middle connecting block 722 and the two supporting legs 723 are an integrated connection structure; the output end of the hydraulic cylinder 73 is connected to the T-slot in the center of the middle connecting block 722, and the two longitudinal guide blocks 721 are slidably matched with the sliding groove on the outside of the hydraulic cylinder 73. The longitudinal guide blocks 721 ensure that the connecting body 72 produces longitudinal displacement under the drive of the hydraulic cylinder 73; the two supporting legs 723 are respectively parallel to the corresponding inclined holes 711 and the two are slidably matched; in the initial state, the bottom end of the supporting leg 723 Near the top of the inclined hole 711, when oil is supplied to the upper oil chamber of the hydraulic cylinder 73, the output end of the hydraulic cylinder 73 pushes the middle connecting block 722 to move toward the workpiece 4, and the support leg 723 contacts the inclined hole 711 and slides smoothly into the inclined hole 711. During the process of the two support legs 723 continuing to slide along the corresponding inclined holes 711, the two centripetal sliders 71 are forced to converge toward the axis of the stator 1. Since the two centripetal sliders 71 are coaxial with the stator 1 and have the same radius as the middle part 44 of the cylinder, after the two centripetal sliders 71 clamp the workpiece 4, the rotation axis of the workpiece 4 coincides with the axis of the stator 1, thereby achieving the purpose of fixing the rotation axis of the workpiece 4.

[0024] There are annular oil chamber 11 and annular oil chamber 2 12 between stator 1 and rotating rotor 3, and annular oil chamber 11 and annular oil chamber 2 12 are connected to the upper oil chamber and lower oil chamber of hydraulic oil cylinder 73 respectively. Stator 1 is provided with a refueling port corresponding to annular oil chamber 11 and annular oil chamber 2 12, and rotating rotor 3 is also provided with a small hole 1 34 and a small hole 2 35, and small hole 1 34 is connected to annular oil chamber 11 and the upper oil chamber of hydraulic oil cylinder 73, and small hole 2 35 is connected to annular oil chamber 2 12 and the lower oil chamber of the hydraulic oil cylinder 73, the small hole 1 34 and the small hole 2 35 are all L-shaped; since the hydraulic oil cylinder 73 will rotate with the rotating rotor 3, the small hole 1 34 and the small hole 2 35 will also rotate synchronously with the hydraulic oil cylinder 73, ensuring that the hydraulic oil cylinder 73 can also be supplied with oil during the rotation process; the oil filling ports corresponding to the annular oil chamber 1 11 and the annular oil chamber 2 12 are set on the stator 1, and the oil filling ports corresponding to the annular oil chamber 1 11 and the annular oil chamber 2 12 are fixed. There are three annular sealing grooves 33 on the rotating rotor 3, and the three annular sealing grooves 33 are arranged around the annular oil chamber 1 11 and the annular oil chamber 2 12 for placing sealing rings. There is an annular sealing groove 33 in the middle of the annular oil chamber 1 11 and the annular oil chamber 2 12, an annular sealing groove 33 on the other side of the annular oil chamber 1 11, and an annular sealing groove 33 on the other side of the annular oil chamber 2 12. After the sealing rings are placed in the three annular sealing grooves 33, the annular oil chamber 1 11 and the annular oil chamber 2 12 play a sealing role.

[0025] When in use, first assemble the clamp 6. Specifically, place a sealing ring in the annular sealing groove 33, and clamp the stator 1 and stator 2 2 at both ends of the rotating mover 3, so that the small hole 1 34 and the small hole 2 35 correspond to the upper oil chamber and the lower oil chamber of the hydraulic cylinder 73 respectively; at this time, the lower base 81 is separated from the upper clamping seat 82, and the clamp 6 is placed in the semicircular groove of the lower base 81 and then the upper clamping seat 82 is placed in place, and the outer circle of the stator 1 and stator 2 2 is fixed to the lower base 81 and the upper clamping seat 82 with bolts. When grinding the workpiece 4, the first end face 41 of the workpiece 4 is placed into the inner cavity 31 from the side of the stator 2, and the second end face 42 is pushed to make the workpiece 4 slide toward the stator 1 side. Since the inner diameter of the limiting boss 311 is smaller than the outer diameter of the annular protrusion 43, the workpiece 4 cannot be pushed when the limiting boss 311 abuts against the annular protrusion 43, that is, the workpiece 4 is in place horizontally. The second end face 42 is held by hand to supply oil to the annular oil cavity 11, and the telescopic end of the hydraulic cylinder 73 pushes the middle connecting block 722 to move toward the workpiece 4, and the two legs 723 slide into the corresponding inclined holes 711. During the sliding process of the support leg 723 in the inclined hole 711, the two centripetal sliders 71 shrink and move closer to the axis to hold the cylindrical middle part 44 tightly to complete the centering requirement of the workpiece 4; the belt connects the motor pulley 51 and the movable pulley 32, and the grinding wheels corresponding to the first end face 41 and the second end face 42 are prepared, and the reduction motor 5 is started to rotate the workpiece 4; after the grinding is completed, the annular oil chamber 12 is supplied with oil, so that the telescopic end of the hydraulic cylinder 73 shrinks, and the connecting body 72 moves away from the workpiece 4. At the same time, the two centripetal sliders 71 release the workpiece 4, and the workpiece 4 can be taken out from the stator 2 end.

[0026] The above embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A special fixture device for double end surface grinding, used for fixing a workpiece (4) and driving it to rotate, the workpiece (4) comprising a first end surface (41), a second end surface (42), an annular convexity (43) and a cylindrical middle portion (44), characterized in that: The invention comprises a reduction motor (5), a motor pulley (51) of the reduction motor (5) is connected to a clamp (6), and the clamp (6) is detachably fixed in a clamp fixing seat (8); the clamp (6) comprises a stator 1 (1), a stator 2 (2) and a rotating mover (3), the rotating mover (3) is arranged between the stator 1 (1) and the stator 2 (2), the stator 1 (1), the stator 2 (2) and the rotating mover (3) are arranged concentrically, and the rotating mover (3) is rotatably connected relative to the stator 1 (1) and the stator 2 (2). The inner cavity (31) of the rotating movable member (3) can accommodate a workpiece (4), the first end face (41) and the second end face (42) both extend outward from the two ends of the rotating movable member (3), the inner cavity (31) is provided with a limiting boss (311), and the limiting boss (311) abuts against the annular protrusion (43) of the workpiece (4); the rotating movable member (3) is further provided with a centering structure (7), the centripetal movement end of the centering structure (7) is clamped on the outer side of the cylindrical middle part (44) and can perform centripetal contraction movement relative to the center of the stator (1).

2. The double-end grinding fixture device according to claim 1, characterized in that: The stator 1 (1) and the stator 2 (2) are both annular and are respectively clamped on the outer sides of the two ends of the rotating mover (3). The rotating mover (3) is provided with a mover pulley (32) protruding in the direction of the stator 1 (1), and the mover pulley (32) is connected to the motor pulley (51) through a belt.

3. The double-end grinding fixture device according to claim 2, characterized in that: The centripetal motion end of the centering structure (7) is composed of two centripetal sliders (71) arranged in mirror symmetry. The centripetal sliders (71) are slidably connected relative to the stator one (1) and are provided with an inclined hole (711). A circular arc groove (712) is provided on one side of the centripetal slider (71) close to the inner cavity (31). The circular arc groove (712) is coaxial with the stator one (1) and the radius of the circular arc groove (712) is the same as the radius of the middle part (44) of the cylinder.

4. The double-end grinding fixture device as claimed in claim 3, characterized in that: The centering structure (7) also includes a hydraulic cylinder (73) and a connecting body (72); the connecting body (72) includes two longitudinal guide blocks (721), a middle connecting block (722) and two supporting legs (723) connected in one piece; the output end of the hydraulic cylinder (73) is connected to the center of the middle connecting block (722); the two longitudinal guide blocks (721) are slidably matched with the outer side of the hydraulic cylinder (73); and the two supporting legs (723) are slidably matched with the two inclined holes (711).

5. The double-end grinding fixture device according to claim 4, characterized in that: An annular oil chamber 1 (11) and an annular oil chamber 2 (12) are provided between the stator 1 (1) and the rotating rotor (3). The annular oil chamber 1 (11) and the annular oil chamber 2 (12) are respectively connected to the upper oil chamber and the lower oil chamber of the hydraulic cylinder (73). The stator 1 (1) is provided with oil filling ports corresponding to the annular oil chamber 1 (11) and the annular oil chamber 2 (12).

6. The double-end grinding fixture device according to claim 5, characterized in that: The rotating mover (3) is provided with three annular sealing grooves (33), which are arranged around annular oil chamber 1 (11) and annular oil chamber 2 (12) and are used to place sealing rings.

7. The double-end grinding fixture device according to claim 6, characterized in that: The rotating rotor (3) is also provided with a small hole 1 (34) and a small hole 2 (35). The small hole 1 (34) is connected to the annular oil chamber 1 (11) and the upper oil chamber of the hydraulic cylinder (73), and the small hole 2 (35) is connected to the annular oil chamber 2 (12) and the lower oil chamber of the hydraulic cylinder (73).

8. The double-end grinding fixture device according to claim 1, characterized in that: The clamp fixing seat (8) comprises a lower base (81) and an upper clamping seat (82) which are detachably connected, and the lower base (81) and the upper clamping seat (82) are both provided with semicircular grooves of the same radius, and the radius of the semicircular groove is greater than the rotation radius of the rotating mover (3).

Images