CN115582744A - Adjustable positioning fixture for grinding eccentric inner hole of shaft part - Google Patents

Abstract

The invention discloses an adjustable positioning fixture for eccentric inner hole grinding of shaft parts, which mainly includes a clamp body, a locking device and a supporting device. After the technical solution of the present invention, it can quickly and efficiently locate the shaft of the shaft part in the axial and circumferential directions, meet the roundness and cylindricity requirements of the eccentric inner hole, and ensure the machining accuracy of the eccentric inner hole grinding , in order to better control product quality, improve product quality stability, and increase production efficiency. In addition, the adjustable positioning fixture for eccentric inner hole grinding of shaft parts in the present invention has simple structure, convenient operation, accurate positioning, and high precision.

Description

An adjustable positioning fixture for eccentric inner hole grinding of shaft parts

technical field

The invention relates to a fixture, in particular to an adjustable positioning fixture for eccentric inner hole grinding of shaft parts, and belongs to the technical field of mechanical manufacturing.

Background technique

The characteristic of shaft parts is that there is an eccentric inner hole at the end of the shaft diameter. The size control of the eccentric inner hole is the technical difficulty and key point of the entire workpiece processing, and the clamping and positioning of the workpiece is the key technology for processing the eccentric inner hole. The existing When grinding the eccentric inner hole of shaft parts, the eccentric inner hole is manually added to the center of the machine tool spindle. This method has large human errors and low work efficiency, and needs to be improved.

Contents of the invention

The invention provides an adjustable positioning fixture for eccentric inner hole grinding of shaft parts, which can position the workpiece axially and circumferentially, accurately locate the central axis of the eccentric inner hole, and meet the roundness and cylindricity requirements of the eccentric inner hole , to ensure the machining accuracy of the eccentric inner hole.

The present invention adopts the following technical solutions: an adjustable positioning fixture for eccentric inner hole grinding of shaft parts, which mainly includes a clamp body, a locking device and a supporting device, and the locking device is located on the upper part of the clamp body and between the clamp body connection, the upper part of the clamp body is horizontally opened with an I-shaped groove, and the clamp body is provided with a clamping hole, the clamping hole is set as a through hole, and the clamping hole runs through the entire clamp body from front to back in a horizontal direction. Both the front side and the back side of the bottom are provided with through holes to communicate with the upper part of the clamping hole. The support device mainly includes a support block, and support grooves are respectively provided at the front end and the rear end of the support block, and the middle part of the support block is provided with It is a plane, the plane is located between the support groove at the front end and the support groove at the rear end, and a positioning block is provided at the front end of the support block, and the support block is inserted into the clamping hole from front to back and fixed to the clamping hole through the connecting piece Inside, the locking device mainly includes a pressing block, and a locking piece is arranged on the upper part of the pressing block. The front end and the rear end of the pressing block are respectively provided with a downward front presser foot and a rear presser foot. The pressing block is arranged from top to bottom. After being inserted into the I-shaped groove, the front presser foot and the rear presser foot respectively enter the clamping hole through the front and rear side holes of the I-shaped groove bottom, and the pressing block is connected with the middle part of the I-shaped groove through the locking piece. Connect with the clamp body.

Further, the support grooves at the front end and the rear end of the support block are all set as V-shaped grooves, and the shaft parts to be ground are placed on the V-shaped grooves after entering the clamping holes.

Furthermore, the structure of the connector mainly includes two symmetrical connecting screw holes II provided on the front and rear bottoms of the bottom of the support block, and positioning screw holes I provided on the front and rear of the side of the clamp body. And two symmetrical positioning screw holes II are respectively provided on the front side and the rear side of the lower part of the clamp body. When the support block extends into the clamping hole, the support block is positioned in the clamping hole by screwing in the long bolt Ⅰ in the positioning screw hole Ⅰ to offset the side of the support block, and the front side of the bottom of the support block The two symmetrical connection screw holes II correspond to the two symmetrical positioning screw holes II on the front side of the lower part of the clamp body, and the two symmetrical connecting screw holes II on the rear side of the bottom of the support block correspond to the two symmetrical positioning screw holes II on the rear side of the lower part of the clamp body. Screw the bolt II into the front two connecting screw holes II and the corresponding two positioning screw holes II, and in the back two connecting screw holes II and the corresponding two positioning screw holes II, and then connect the bottom of the support block with the clamp body. The bottom surface of the clamping hole is connected.

Furthermore, the briquetting block is provided with a locking cross bar, and a locking threaded hole is provided at the middle position of the locking cross bar, and a connecting threaded hole is provided at the middle position inside the I-shaped groove, and the two ends of the locking cross bar are respectively connected with vertical The lower front presser foot and rear presser foot, the front presser foot and the rear presser foot are connected with the locking bar to form an integral structure. After being inserted into the I-shaped groove, the front presser foot and the rear presser foot of the door-shaped pressure block respectively enter into the clamping hole through the front and rear side through holes of the I-shaped groove bottom, and the locking threaded hole of the locking cross bar and the The connecting threaded holes inside the I-shaped groove correspond to each other, and the door-shaped pressure block and the clamp body are detachably connected by inserting locking pieces into the locking threaded holes and the connecting threaded holes.

Furthermore, the clamping hole is set as a square hole.

Further, the locking member mainly includes a locking bolt and a locking nut, the locking nut is tightened on the locking bolt, and the locking nut is rotated so that the locking bolt penetrates into the locking threaded hole and the connecting threaded hole, A washer is sheathed on the locking bolt, and when the door-shaped pressing block and the clamp body need to be connected, the lock nut is tightened so that the door-shaped pressing block and the clamp body are tightly connected.

Furthermore, the positioning block is set as a square positioning block, and the size of the square positioning block corresponds to the height of the step of the shaft end surface of the shaft part to be ground.

Furthermore, the clamp body is a cylindrical clamp body placed horizontally.

The present invention has the following beneficial effects: after adopting the above technical scheme, the present invention can quickly and efficiently perform axial and circumferential positioning on the shaft of shaft parts, meet the roundness and cylindricity requirements of the eccentric inner hole, and ensure The processing accuracy of eccentric inner hole grinding is improved, so as to better control product quality, improve product quality stability, and improve production efficiency. In addition, the adjustable positioning fixture for eccentric inner hole grinding of shaft parts in the present invention has simple structure and easy operation. Convenient, accurate positioning and high precision.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the assembled structure of the present invention.

Fig. 2 is a schematic diagram of the assembled bottom surface of the present invention.

Fig. 3 is an exploded schematic view of the present invention.

Fig. 4 is a schematic view of the present invention after inserting shaft parts.

Fig. 5 is a schematic view of the present invention after preparing to insert shaft parts.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

In Fig. 1, Fig. 2 and Fig. 3, the present invention provides an adjustable positioning fixture for eccentric inner hole grinding of shaft parts, which mainly includes a clamp body 1, a locking device 2 and a support device 3, and the clamp body 1 is A cylindrical clamp body placed horizontally. The locking device 2 is located on the upper part of the clamp body 1 and is detachably connected to the clamp body 1. The upper part of the clamp body 1 is horizontally opened with an I-shaped groove 11. The clamp body 1 There is a clamping hole 15 inside, the clamping hole is set as a square hole, the clamping hole 15 is set as a through hole, the clamping hole 15 runs through the entire clamping body 1 from front to back, and the front side and the rear of the groove bottom of the I-shaped groove 11 Both sides are provided with through holes 16 to communicate with the upper part of the clamping hole 15. The support device 3 mainly includes a support block 34. The size of the support block 34 in this embodiment corresponds to the size of the clamping hole 15. The support block The length of 34 is greater than the length of the clamping hole 15, the width of the clamping hole 15 is greater than the width of the support block 34, the height of the support block 34 is less than the height of the clamping hole 15, and the front end and the rear end of the support block 34 are respectively provided with The support groove 31, the middle part of the support block 34 is arranged as a plane, and the plane is located between the support groove 31 at the front end and the support groove 31 at the rear end, and the support groove 31 at the front end and the rear end of the support block 34 of the present embodiment is all set as a V-shaped groove. Shaft parts 6 that need to be ground are placed on the V-shaped groove after entering the clamping hole 15, and a positioning block 32 is provided at the front end of the support block 34. The positioning block 32 of this embodiment is set as a square positioning Block, the size of the square positioning block corresponds to the height of the shaft end surface step of the shaft part 6 to be ground, and the support block 34 is inserted into the clamping hole 15 from front to back and fixed in the clamping hole 15 through the connecting piece The structure of the connector in this embodiment mainly includes two symmetrical connecting screw holes II33 provided on the front and rear bottoms of the bottom of the support block 34, and positioning screws provided on the front and rear of the side of the clamp body 1. Hole I14 and two symmetrical positioning screw holes II13 are respectively provided on the front side and rear side of the lower part of the clamp body. The positioning screw hole I14 penetrates from the surface of the clamp body 1 to the clamping hole 15. The bottom surface penetrates upwards into the clamping hole 15. When the support block 34 is inserted into the clamping hole 15, the support block 34 is positioned on In the clamping hole 15, the long bolt I5 of this embodiment is set as a long hexagonal cylindrical head bolt, and the two symmetrical connecting screw holes II33 on the front side of the bottom of the support block 34 correspond to the two symmetrical positioning screw holes II13 on the front side of the lower part of the clamping body 1. , the two symmetrical connecting screw holes II33 on the rear side of the bottom of the support block 34 correspond to the two symmetrical positioning screw holes II13 on the lower rear side of the clamp body 1, through the two connecting screw holes II33 in the front and the corresponding two positioning screw holes II13 and in the After the two connecting screw holes II33 and the corresponding two positioning screw holes II13 are screwed into the bolt II4, the bottom of the support block 34 is connected with the bottom surface of the clamping hole 15 in the clamp body 1. The bolt II4 of this embodiment is set as an inner Hexagonal cylindrical head bolts, the locking device 2 mainly includes a pressing block 21, a locking piece is arranged on the upper part of the pressing block 21, and the pressing The front and rear ends of the block 21 are respectively provided with a downward front presser foot 213 and a rear presser foot 214. After the presser block 21 is inserted into the I-shaped groove 11 from top to bottom, the front presser foot 213 and the rear presser foot 214 respectively pass through the process. The through holes 16 on the front side and the rear side of the groove bottom of the character groove 11 enter into the clamping hole 15, and the pressing block 21 is connected to the middle part of the I-shaped groove 11 through a locking piece and is detachably connected to the clamp body 1. In this implementation The briquetting block 21 of example is provided with locking cross bar 212, is provided with locking threaded hole 211 in the middle position of locking cross bar 212, is provided with connecting threaded hole 111 in the middle position inside I-shaped groove 11, and the two ends of locking cross bar 212 are respectively The front presser foot 213 and the rear presser foot 214 are connected vertically downward. The front presser foot 213 and the rear presser foot 214 are connected with the locking cross bar 212 to form an integral structure. Combined to form a door-shaped pressing block, when the door-shaped pressing block is inserted into the I-shaped groove 11, the front presser foot 213 and the rear presser foot 214 of the door-shaped pressing block respectively pass through the front and rear side holes of the bottom of the I-shaped groove 11 Into the clamping hole 15, the locking threaded hole 211 of the locking bar 212 corresponds to the connecting threaded hole 111 inside the I-shaped groove 11, and the door is locked by inserting a locking piece into the locking threaded hole 211 and the connecting threaded hole 111. There is a detachable connection between the shaped briquetting block and the clamp body 1. The locking member mainly includes a locking bolt 22 and a locking nut 23. The locking nut 23 is tightened on the locking bolt 22. Turning the locking nut 23 makes the locking The bolt 22 penetrates into the locking threaded hole 211 and the connecting threaded hole 111, and a washer 24 is set on the locking bolt 22. The door-shaped pressing block is firmly connected with the clip body 1 .

In Fig. 4 and Fig. 5, the use process of the present invention is introduced below. The steps are: first, slowly insert the shaft part 6 shaft to be ground into the clamping hole 15 of the clamp body 1, and place it on the support block 34 On the support grooves 31 at the front end and the rear end, since the height of the square positioning block corresponds to the height of the step of the shaft end face of the shaft part 6 to be ground, place the step of the shaft end face of the shaft part 6 on the direction positioning block. Axial positioning of the shaft part 6 is realized by contacting the shaft end surface step of the shaft part 6 with the square positioning block 32; then the shaft part 6 is rotated slightly until the plane of the shaft faces upwards, and the level is measured with a dial gauge; After the door-shaped pressing block is inserted into the I-shaped groove 11, the front presser foot 213 and the rear presser foot 214 of the door-shaped pressing block respectively enter the clamping hole 15 through the front and rear through holes of the groove bottom of the I-shaped groove 11. Squeeze the shaft of the shaft part 6 inside, then connect the door-shaped pressure block with the clamp body 1, and tighten the lock nut 23 with a wrench to realize the circumferential positioning of the shaft part; finally start the machine button to start grinding the eccentric inner Hole 61.

The adjustable positioning fixture for eccentric inner hole grinding of shaft parts of the present invention can quickly and efficiently locate the axial and circumferential directions of shaft parts, meet the roundness and cylindricity requirements of the eccentric inner hole, and ensure that the eccentric inner hole grinding Cutting machining accuracy, in order to better control product quality, improve product quality stability, and improve production efficiency.

It is not limited thereto, and any changes or replacements that do not go through creative efforts shall fall within the scope of protection of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope defined in the claims.

Claims (8)

1. An adjustable positioning fixture for grinding eccentric inner holes of shaft parts is characterized by mainly comprising a fixture body (1), a locking device (2) and a supporting device (3), wherein the locking device (2) is positioned on the upper portion of the fixture body (1) and connected with the fixture body (1), an I-shaped groove (11) is transversely formed in the upper portion of the fixture body (1), a clamping hole (15) is formed in the fixture body (1), the clamping hole (15) is set to be a through hole, the clamping hole (15) transversely penetrates through the whole fixture body (1) from front to back, through holes (16) are formed in the front side and the back side of the groove bottom of the I-shaped groove (11) and communicated with the upper portion of the clamping hole (15), the supporting device (3) mainly comprises a supporting block (34), supporting grooves (31) are respectively formed in the front end and the back end of the supporting block (34), a plane is formed in the middle of the supporting block (34), the plane is positioned between the supporting groove (31) at the front end and the supporting groove (31) at the back end, a positioning block (34) is inserted into the pressing block (21) from the front end to the inside of the pressing block (15), a pressing block (21) and a pressing block fixing device (21) are respectively arranged at the front end of the pressing block (21), after the pressing block (21) is inserted into the I-shaped groove (11) from top to bottom, the front pressing foot (213) and the rear pressing foot (214) enter the clamping hole (15) through the through hole (16) on the front side and the rear side of the groove bottom of the I-shaped groove (11), and the pressing block (21) is connected with the middle of the I-shaped groove (11) through the locking piece and then connected with the clamp body (1).

2. The adjustable positioning fixture for eccentric inner hole grinding of shaft parts according to claim 1, characterized in that the supporting grooves (31) at the front and rear ends of the supporting blocks (34) are arranged as V-shaped grooves, and the shaft body of the shaft part (6) to be ground enters the clamping hole (15) and then is placed on the V-shaped grooves.

3. The adjustable positioning fixture for eccentric inner hole grinding of shaft parts as claimed in claim 1, wherein the structure of the connecting piece mainly comprises two symmetrical connecting screw holes II (33) respectively provided at the front side and the rear side of the bottom of the supporting block (34), positioning screw holes I (14) respectively provided at the front part and the rear part of the side surface of the fixture body (1), and two symmetrical positioning screw holes II (13) respectively provided at the front side and the rear side of the lower part of the fixture body,

the positioning screw hole I (14) penetrates into the clamping hole (15) from the surface of the clamp body (1), the positioning screw hole II (13) penetrates into the clamping hole (15) from the bottom surface of the clamp body (1) upwards,

after the supporting block (34) extends into the clamping hole (15), the supporting block (34) is positioned in the clamping hole (15) after a long bolt I (5) is screwed into the positioning screw hole I (14) to abut against the side surface of the supporting block (34),

two symmetrical connecting screw holes II (33) at the front side of the bottom of the supporting block (34) correspond to two symmetrical positioning screw holes II (13) at the front side of the lower part of the fixture body (1), two symmetrical connecting screw holes II (33) at the rear side of the bottom of the supporting block (34) correspond to two symmetrical positioning screw holes II (13) at the rear side of the lower part of the fixture body (1),

after bolts II (4) are screwed into the two front connecting screw holes II (33) and the two corresponding positioning screw holes II (13) and the two rear connecting screw holes II (33) and the two corresponding positioning screw holes II (13), the bottom of the supporting block (34) is connected with the bottom surface of the clamping hole (15) in the fixture body (1).

4. The eccentric inner hole grinding adjustable positioning fixture for the shaft parts as claimed in claim 1, characterized in that the pressing block (21) is provided with a locking cross bar (212), a locking threaded hole (211) is formed in the middle of the locking cross bar (212), a connecting threaded hole (111) is formed in the middle of the inside of the i-shaped slot (11), two ends of the locking cross bar (212) are respectively connected with a front pressing foot (213) and a rear pressing foot (214) which are vertically downward, the front pressing foot (213) and the rear pressing foot (214) are connected with the locking cross bar (212) to form an integral structure, the front pressing foot (213) and the rear pressing foot (214) are combined with the locking cross bar (212) to form a door-shaped pressing block, when the door-shaped pressing block is inserted into the i-shaped slot (11), the front pressing foot (213) and the rear pressing foot (214) of the door-shaped pressing block enter the clamping hole (15) through the front side and rear side through holes in the slot bottom of the i-shaped slot (11), the locking threaded hole (211) and the connecting threaded hole (111) are respectively, and the locking threaded hole (211) and the door-shaped pressing block (1) and the detachable connecting piece can be connected with the detachable.

5. The adjustable positioning fixture for eccentric inner hole grinding of shaft parts as claimed in claim 1, 2 or 4, wherein the clamping holes (15) are square holes.

6. The adjustable positioning fixture for eccentric inner hole grinding of shaft parts as claimed in claim 4, characterized in that the locking member mainly comprises a locking bolt (22) and a locking nut (23), the locking nut (23) is screwed on the locking bolt (22), the locking nut (23) is screwed to enable the locking bolt (22) to penetrate into the locking threaded hole (211) and the connecting threaded hole (111), the locking bolt (22) is sleeved with a gasket (24), and when the portal press block is required to be connected with the fixture body (1), the portal press block is tightly connected with the fixture body (1) by screwing the locking nut (23).

7. The adjustable positioning fixture for grinding the eccentric inner hole of the shaft part as claimed in claim 1, wherein the positioning block (32) is a square positioning block, and the size of the square positioning block corresponds to the height of the step of the shaft end face of the shaft part (6) to be ground.

8. The adjustable positioning fixture for eccentric inner hole grinding of shaft parts as claimed in claim 1, 3 or 4, wherein the fixture body (1) is a horizontally placed cylindrical fixture body.

Images