CN116394036A - A clamping tool and processing technology for eccentric workpiece - Google Patents

Abstract

The invention provides a clamping tool for eccentric workpieces and a processing technology for eccentric workpieces, wherein the clamping tool for eccentric workpieces includes a base, the base is a regular octagonal structure, and the base is provided with holes that run through the front and rear sides of the base. The first installation hole, a clamping mechanism is provided under the base, and the clamping mechanism includes the left clamping arm, the right clamping arm and the compression screw with the same structure; the processing technology of the eccentric workpiece uses the clamping tool to clamp the cylindrical workpiece The outer circle reference of the workpiece is transferred to the side of the clamping tool, and the workpiece is processed with multiple eccentric hole structures; the clamping tool of the eccentric workpiece and the processing technology of the eccentric workpiece in this application have a simple and convenient installation structure , the workpiece is clamped in the clamping tool for various turning and milling processes, and the base of the clamping tool is used for reference positioning, which can facilitate the processing of holes with different axes on the workpiece, and the base is used for alignment It is efficient and simple, and can improve the machining accuracy and efficiency of eccentric workpieces.

Description

A clamping tool and processing technology for eccentric workpiece

technical field

The invention relates to the technical field of eccentric shaft workpiece processing, in particular to a clamping tool for eccentric workpieces and a processing technology for eccentric workpieces.

Background technique

When processing the shaft-shaped eccentric workpiece shown in Figure 11, the interior of the workpiece is mostly eccentric and has many features, so when the workpiece is processed, it needs to involve multiple conversions of lathes, CNC, wire cutting and other equipment. Clamping, the constant change of the clamping datum causes various errors, resulting in low machining accuracy and slow efficiency of parts.

Contents of the invention

The object of the present invention is to provide a clamping tool and processing technology for eccentric workpieces, so as to solve the technical problems in the background technology.

In order to achieve the aforementioned object, the present invention provides the following technical solutions:

A clamping tool for an eccentric workpiece, including a base, the base is a regular octagonal structure, the base is provided with a first installation hole that runs through the front and rear sides of the base, and the bottom of the first installation hole The upper part of the first installation hole is an inverted isosceles trapezoid, and a clamping mechanism is provided under the base, and the clamping mechanism includes a left clamping arm, a right clamping arm and a clamping arm with the same structure. Compression screws, the left and right clamping arms are symmetrically hinged and installed on the left and right sides below the base, and the left and right clamping arms are connected under the left and right clamping arms through the compression screws. For locking connection, the left and right sides of the lower part of the first installation hole are respectively provided with a first clamping through hole and a second clamping through hole corresponding to the positions of the left clamping arm and the right clamping arm, the left The upper part of the clamping arm passes through the first clamping through hole and interferes with the workpiece in the first mounting hole, and the upper part of the right clamping arm passes through the second clamping through hole and interferes with the workpiece in the first mounting hole. Several first locking holes are annularly arranged on the seat along the axis of the base, and the locking holes run through the front and rear ends of the base.

The front side above the base is also equipped with a side positioning block, and there is a concave positioning card slot below the side positioning block. The longitudinal section of the positioning card slot is an inverted isosceles trapezoidal structure, and the positioning card A positioning pin is installed on the top of the slot, and the positioning pin is perpendicular to the top surface of the positioning slot, and the side positioning block is detachably connected to the base by screws.

The left clamping arm includes a left mounting block, above which there are two left clamping bars that extend upwards and bend outwards, the bending angle of the two left clamping bars is the inner angle of the base Corresponding in size, the base is provided with two first clamping through holes corresponding to the position of the left clamping bar, and the two left clamping bars rotate with the first clamping through hole on the base through the first rotating shaft connected, the first rotating shaft passes through the first clamping through hole and the left clamping bar, the first fixing hole is provided on the left mounting block, the right clamping arm includes a right mounting block, and the upper part of the right mounting block is provided There are two right clamping bars that extend upwards and bend outwards, the right mounting block is provided with a second fixing hole, the left mounting block and the right mounting block are both under the base, and the compression screw passes through The first fixing hole and the second fixing hole lock and connect the left clamping arm and the right clamping arm.

A processing technology for eccentric workpieces, using the above-mentioned clamping tool for eccentric workpieces, comprising the following processing steps:

Step S1, placing the raw material on a lathe, turning the raw material into a cylindrical workpiece, one side of the cylindrical workpiece is processed with a first forming hole, and the axis of the first forming hole is coaxial with the axis of the cylindrical workpiece;

Step S2, machining the workpiece in step S1 into a process hole through a drilling machine, and the process hole and the first forming hole are not on the same side;

Step S3, clamping the workpiece in step S2 in the first installation hole of the clamping tool, adjusting the position of the workpiece in the first installation hole, aligning the workpiece and the clamping tool, the left clamping arm and the right clamping arm Conflict and compress with the outer wall of the workpiece, the positioning pin on the side positioning block is inserted into the process hole, the inner walls on both sides of the positioning slot are in conflict with the outer wall of the workpiece, and the side positioning block is locked with the base;

Step S4, installing the clamping tool in step S3 on a milling machine, using a vise to clamp the two sides of the clamp, leveling the bottom datum with a dial indicator, and processing the threading hole, which is coaxial with the first forming hole;

Step S5, install the clamping tool in step S4 on the wire cutting machine, take the top surface of the base as reference A, the rear end surface of the base as reference B, and the side of the base as reference C, adjust the molybdenum wire on the cutting machine Simultaneously parallel to reference A and reference C, process the second forming hole, the second forming hole communicates with the first forming hole, the axis of the second forming hole does not coincide with the axis of the first forming hole, the axis of the second forming hole The distance between the center and the axis of the first forming hole is 9.53±0.01mm;

Step S6, install the clamping tool in step S5 on the eccentric adjustment mechanism, adjust the upper and lower positions of the clamping tool, process the boss on the right side of the workpiece, and the axis of the boss is far from the axis of the first forming hole 10.16±0.01mm;

Step S7, remove the side positioning block on the clamping tool in step S6, turn the clamping tool vertically by 180 degrees, that is, face the first forming hole to the outside, and align and adjust the clamping tool and the eccentric adjustment mechanism;

Step S8, performing rough turning and finish turning on the left side of the eccentric workpiece according to the size of the drawing for the workpiece in step S7;

Step S9, vertically flip the clamping tooling in step S8 by 180 degrees and then align it with the eccentric adjustment mechanism, and perform finish turning on the boss on the right side of the eccentric workpiece according to the size of the drawing;

Step S10, detach the clamping tooling in step S9 from the eccentric adjustment mechanism, install the clamping tooling on the vise, use the base side of the clamping tooling as a reference plane to fit the fixed jaw of the vise, and base The other side of the seat is against the movable jaw of the vise, and the end face in the thickness direction of the clamping tool is used as the reference plane to level the side of the base, and the first hole on the left side of the eccentric workpiece is fine-milled;

Step S11, finish milling the second hole on the right side of the eccentric workpiece in step S10;

Step S12, on the left side of the eccentric tooling in step S11, the ear milling slot on the left side of the eccentric workpiece and the third hole on the right side according to the structure of the drawing file;

In step S13, the clamping tool is removed, and the eccentric workpiece is detected and put into storage.

The eccentric adjustment mechanism includes a disc and an adjustable slide plate connected to the disc, the clamping tool is fixed on the slide plate, and a hole is provided on the disc, and the center of the hole is aligned with the disc The center of the circle coincides, and a guide hole is correspondingly provided on the slide plate to communicate with the avoidance hole. A chute is provided on the disc, and the slide plate is in the chute. The disk is fixedly connected, the bottom of the adjustment rod on the micrometer is in conflict with the top of the slide plate, and several long adjustment holes are arranged on the slide plate, and positioning holes are correspondingly provided on the disk, and the inside of the adjustment hole is pierced The adjusting screw is threadedly connected with the positioning hole.

Compared with the prior art, this application provides a clamping tool and processing technology for eccentric workpieces. The clamping tool has a simple and convenient installation structure, and the workpiece is clamped in the clamping tool for various turning and milling processes. The base is used for reference positioning, which can facilitate the processing of holes with different axes on the workpiece, and the use of the base for alignment is efficient and simple, and can improve the machining accuracy and efficiency of eccentric workpieces.

Description of drawings

Figure 1: The three-dimensional structure diagram of the clamping tooling of this application;

Figure 2: The front view of the base of the application;

Figure 3: Schematic diagram of the three-dimensional structure of the clamping mechanism;

Figure 4: Bottom view of the clamping tooling of this application;

Figure 5: D-D sectional view of Figure 4;

Figure 6: A three-dimensional structure diagram of the eccentricity adjustment mechanism in this application;

Figure 7: Another three-dimensional structure diagram of the eccentric adjustment mechanism;

Figure 8: Schematic diagram of the installation effect of the clamping tool and the eccentric adjustment mechanism;

Figure 9: Side view of clamping fixture and workpiece installation;

Figure 10: Front view of clamping tooling and workpiece installation;

Figure 11: Schematic diagram of the three-dimensional structure of the eccentric workpiece processed in this application;

Figure 12: Left view of the eccentric workpiece processed in this application;

Figure 13: Right side view of the eccentric workpiece machined in this application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Specific embodiment 1: Please refer to Fig. 1 to Fig. 13. In an embodiment of the present invention, a clamping tool for an eccentric workpiece includes a base 1. The base 1 is a regular octagonal structure. The base 1 is provided with a through base. The first mounting holes 101 on the front and rear sides of the seat 1, the lower part 101-2 of the first mounting hole 101 is a circular arc structure, the upper part 101-1 of the first mounting hole 101 is an inverted isosceles trapezoid, and the bottom of the base 1 A clamping mechanism 2 is provided, and the clamping mechanism 2 includes a left clamping arm 201, a right clamping arm 202 and a compression screw 205 with the same structure. Side, through the compression screw 205 under the left clamp arm 201 and the right clamp arm 202 and the left clamp arm 201 and the right clamp arm 202 are locked and connected, the left and right sides of the lower part of the first mounting hole 101 are respectively provided with The first clamping through hole 102 and the second clamping through hole 103 correspond to the positions of the left clamping arm 201 and the right clamping arm 202, and the upper part of the left clamping arm 201 passes through the first clamping through hole 102 and the first mounting hole The workpiece 7 in 101 interferes, and the upper part of the right clamping arm 202 passes through the second clamping through hole 103 and interferes with the workpiece 7 in the first mounting hole 101. On the base 1, there are several rings along the axis of the base 1. a first lock hole 104, the first lock hole 104 runs through the front and rear ends of the base 1.

The front side above the base 1 is also equipped with a side positioning block 3, and a concave positioning slot 301 is arranged below the side positioning block 3. The longitudinal section of the positioning slot 301 is an inverted isosceles trapezoidal structure, and the positioning slot 301 A positioning pin 302 is installed on the top, and the top surface of the positioning pin 302 and the positioning slot 301 are perpendicular to each other, and the side positioning block 3 and the base 1 are detachably connected by screws.

The left clamping arm 201 includes a left mounting block 201-1, and above the left mounting block 201-1, there are two left clamping bars 201-2 extending upward and bending toward the outside. The bending angle of the two left clamping bars 201-2 is Corresponding to the inner angle of the base 1, the base 1 is provided with two first clamping through holes 102 corresponding to the positions of the left clamping bars 201-2, and the two left clamping bars 201-2 pass through the first rotating shaft 203 is rotationally connected with the first clamping through hole 102 on the base 1, the first rotating shaft 203 passes through the first clamping through hole 102 and the left clamping bar 201-2, and the first fixing hole is arranged on the left mounting block 201-1 , the right clamping arm 202 includes a right mounting block 202-1, and above the right mounting block 202-1, there are two right clamping bars 202-2 extending upward and bending toward the outside, and the two right clamping bars 202-2 pass through the first The second rotating shaft 204 is rotationally connected with the second clamping through hole 103 on the base 1, and the right mounting block 202-1 is provided with a second fixing hole, and the left mounting block 201-1 and the right mounting block 202-1 are all mounted on the base. 1, the compression screw 205 passes through the first fixing hole and the second fixing hole to lock and connect the left clamping arm 201 and the right clamping arm 202.

A processing technology for eccentric workpieces, using the above clamping tool for eccentric workpieces, including the following processing steps:

Step S1, the raw material is placed on the lathe, and the raw material is turned into a cylindrical workpiece 7. A first forming hole 701 is processed on one side of the cylindrical workpiece 7. The axis of the first forming hole 701 is aligned with the cylindrical workpiece 7. Axis coaxial;

Step S2, process the workpiece 7 in step S1 through a drilling machine to form a process hole, and the process hole and the first forming hole 701 are not on the same side;

Step S3, clamping the workpiece 7 in the step S2 in the first installation hole 101 of the clamping tool, adjusting the position of the workpiece 7 in the first installation hole 101, aligning the workpiece 7 and the clamping tool, and adjusting so that The tangent line of the outer side wall of the workpiece 7 is perpendicular to the front side of the base 1, the tangent line of the outer side wall of the workpiece 7 is parallel to the top surface of the base 1, and the left clamping arm 201 and the right clamping arm 202 are pressed against the outer wall of the workpiece 7, The positioning pin 302 on the side positioning block 3 is inserted into the process hole, and the inner walls on both sides of the positioning slot 301 collide with the outer wall of the workpiece 7 and press tightly, so that the side positioning block 3 and the base 1 are locked;

Step S4, installing the clamping tool in step S3 on the milling machine, using a vise to clamp the two sides of the clamp, leveling the bottom datum with a dial indicator, and processing the threading hole, which is coaxial with the first forming hole 701;

Step S5, install the clamping tool in step S4 on the wire cutting machine, take the top surface of the base 1 as the reference A, the rear end surface of the base 1 as the reference B, and the side of the base 1 as the reference C, and adjust it on the cutting machine. The molybdenum wire is parallel to reference A and reference C at the same time, and the second forming hole 702 is processed. The second forming hole 702 communicates with the first forming hole 701, and the axis center of the second forming hole 702 is different from that of the first forming hole 701. Coincidence, the axis of the second forming hole 702 is 9.53±0.01mm away from the axis of the first forming hole 701;

Step S6, install the clamping tool in step S5 on the eccentric adjustment mechanism, adjust the upper and lower positions of the clamping tool, process the boss on the right side of the workpiece 7, and the axis of the boss is aligned with the axis of the first forming hole 701 Heart distance 10.16±0.01mm;

Step S7, remove the side positioning block 3 on the clamping tool in step S6, turn the clamping tool vertically by 180 degrees, that is, the face where the first forming hole 701 is located faces the outside, and the left side of the workpiece 7 needs to be processed, Align and adjust the clamping tooling and eccentric adjustment mechanism;

Step S8, performing rough turning and finishing machining on the workpiece 7 in step S7 according to the size of the drawing file;

Step S9, vertically flip the clamping tooling in step S8 by 180 degrees and then align it with the eccentric adjustment mechanism, and perform finishing machining on the boss 703 on the right side of the workpiece 7 according to the size of the drawing;

Step S10, detach the clamping tool and the eccentric adjustment mechanism in step S9, install the clamping tool on the vise, and use the side of the base 1 on the clamping tool as a reference plane to fit the fixed jaw of the vise, The other side of the base 1 abuts against the movable jaw of the vise, leveling the side of the base 1 with the end face of the clamping tool in the thickness direction as the reference plane, and leveling the first hole 706 on the left side of the workpiece 7. fine milling;

Step S11, finish milling the second hole 707 on the right side of the workpiece 7 in step S10;

Step S12, on the left side of the eccentric tooling in step S11, the ear milling slot 704 on the left side of the workpiece 7 and the third hole position 705 on the right side are structured according to the drawing file;

In step S13, the clamping tool is removed, and the workpiece 7 is detected and put into storage.

In the present application, the eccentricity adjustment mechanism includes a disc 4 and a slide plate 5 adjustablely connected to the disc 4 , the clamping tool is fixed on the slide plate 5 , and the disc 4 is provided with an escape hole 401 . The center of the circle coincides with the center of the disc 4, and the slide plate 5 is provided with a guide hole and a space-avoiding hole 401 corresponding to the positions used for interspersing the workpiece 7. The disc 4 is provided with a chute 402, and the slide plate 5 is in the chute 402 , the top of the slide plate 5 is provided with a micrometer 6, the micrometer 6 is fixedly connected with the disc 4, the bottom of the adjustment rod on the micrometer 6 is in conflict with the top of the slide plate 5, the slide plate 5 is provided with several elongated adjustment holes 502, and the disc 4 Correspondingly, there is a positioning hole, and the adjustment hole 502 passes through the adjustment screw and is threadedly connected with the positioning hole. According to the positions of different holes, the position of the clamping tool on the disc 4 is adjusted, that is, the clamping tool is adjusted by rotating the micrometer 6 different positions in the vertical direction.

Compared with the prior art, this application provides a clamping tool and processing technology for eccentric workpieces. The clamping tool has a simple and convenient installation structure, and the workpiece is clamped in the clamping tool for various turning and milling processes. The base is used for reference positioning, which can facilitate the processing of holes with different axes on the workpiece, and the use of the base for alignment is efficient and simple, and can improve the machining accuracy and efficiency of eccentric workpieces.

It will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. The utility model provides a clamping frock of eccentric work piece which characterized in that: including the base, the base is regular octagon structure, be equipped with the first mounting hole that runs through both sides around the base in the base, the lower part of first mounting hole is circular arc structure, the upper portion of first mounting hole is the isosceles trapezoid of inversion, the base below is equipped with clamping mechanism, clamping mechanism includes left arm, right arm and the compression screw of the same structure, left side arm and right arm symmetry hinge mount the left and right sides in the base below, through compression screw is in the below of left arm and right arm and carries out locking connection with left arm and right arm, the left and right sides of the lower part of first mounting hole is equipped with first centre gripping through-hole and second centre gripping through-hole respectively and left arm and right arm's position is corresponding, the work piece conflict in first mounting hole is passed on the upper portion of left arm, the work piece conflict in second centre gripping through-hole and the first mounting hole is passed on the upper portion of right arm, be equipped with a plurality of first lockholes of lockholes behind running through on the base along the axle center of base.

2. The clamping tool for eccentric workpieces according to claim 1, wherein: the front side above the base is also provided with a side positioning block, the lower part of the side positioning block is provided with a concave positioning clamping groove, the longitudinal section of the positioning clamping groove is of an inverted isosceles trapezoid structure, the top end of the positioning clamping groove is provided with a positioning pin, the top end surfaces of the positioning pin and the positioning clamping groove are mutually perpendicular, and the side positioning block is detachably connected with the base through a screw.

3. The clamping tool for eccentric workpieces according to claim 2, wherein: the left clamp arm comprises a left mounting block, two left clamp strips extending upwards and bending towards the outer side are arranged above the left mounting block, the bending angles of the left clamp strips correspond to the inner included angle of the base, two first clamping through holes are formed in the base and correspond to the positions of the left clamp strips, the left clamp strips are connected with the first clamping through holes in the base in a rotating mode through first rotating shafts, the first rotating shafts penetrate through the first clamping through holes and the left clamp strips, first fixing holes are formed in the left mounting block, the right clamp arm comprises a right mounting block, two right clamp strips extending upwards and bending towards the outer side are arranged above the right mounting block, second fixing holes are formed in the right mounting block, and the left mounting block and the right mounting block are located below the base and are connected in a locking mode through the first fixing holes and the second fixing holes.

4. A processing technology of an eccentric workpiece is characterized in that: a clamping fixture for an eccentric workpiece according to any one of claims 1-3, comprising the following processing steps:

step S1, placing raw materials on a lathe, and enabling a raw material vehicle to be a cylindrical workpiece, wherein a first forming hole is formed in one side of the cylindrical workpiece, and the axis of the first forming hole is coaxial with the axis of the cylindrical workpiece;

s2, processing a work piece in the step S1 into a process hole through a drilling machine, wherein the process hole and the first molding hole are not on the same side;

step S3, clamping the workpiece in the step S2 in a first mounting hole of a clamping tool, adjusting the position of the workpiece in the first mounting hole, aligning the workpiece with the clamping tool, enabling a left clamping arm and a right clamping arm to be in contact with the outer wall of the workpiece for compaction, enabling positioning pins on a side positioning block to be inserted into process holes, enabling inner walls on two sides in a positioning clamping groove to be in contact with the outer wall of the workpiece for compaction, and locking the side positioning block with a base;

s4, mounting the clamping tool in the step S3 on a milling machine, conveying two sides of the clamp by using a vice clamp, leveling a bottom standard by using a dial indicator, and processing a wire penetrating hole which is coaxial with the first forming hole;

s5, mounting the clamping tool in the step S4 on a linear cutting machine, taking the top end surface of a base as a reference A, the rear end surface of the base as a reference B, and the side edge of the base as a reference C, adjusting a molybdenum wire on the cutting machine to be parallel to the reference A and the reference C, and processing a second molding hole, wherein the second molding hole is communicated with the first molding hole, the axis of the second molding hole is not coincident with the axis of the first molding hole, and the axis of the second molding hole is 9.53+/-0.01 mm away from the axis of the first molding hole;

s6, installing the clamping tool in the step S5 on an eccentric adjustment mechanism, adjusting the upper and lower positions of the clamping tool, and processing a boss on the right side of a workpiece, wherein the axial center of the boss is 10.16+/-0.01 mm away from the axial center of the first molding hole;

s7, dismantling a side positioning block on the clamping tool in the step S6, vertically overturning the clamping tool by 180 degrees, namely, enabling the first forming hole to face outwards, and aligning and adjusting the clamping tool and the eccentric adjusting mechanism;

s8, rough turning and finish turning are carried out on the left outline structure of the eccentric workpiece according to the size of the drawing file on the workpiece in the step S7;

step S9, vertically overturning the clamping tool in the step S8 by 180 degrees, aligning with the eccentric adjusting mechanism, and carrying out finish turning on a boss on the right side of the eccentric workpiece according to the size of a drawing;

step S10, detaching the clamping tool from the eccentric adjusting mechanism in the step S9, installing the clamping tool on a vice, attaching a fixed jaw of the vice with one side of a base on the clamping tool as a reference surface, abutting the other side surface of the base against a movable jaw of the vice, leveling with the end surface of the clamping tool in the thickness direction as the reference surface and the side surface of the base, and finish-milling a first hole site on the left side of an eccentric workpiece;

step S11, finish milling is carried out on the second hole position on the right side of the eccentric workpiece in the step S10;

step S12, milling a lug groove position on the left side of the eccentric workpiece and a third hole position on the right side of the eccentric tool in the step S11 according to a picture structure;

and S13, removing the clamping tool, and detecting and warehousing the eccentric workpiece.

5. The process for machining an eccentric workpiece as recited in claim 4, wherein: the eccentric mechanism comprises a disc and an adjustable sliding plate connected to the disc, the clamping tool is fixed to the sliding plate, a clearance hole is formed in the disc, the circle center of the clearance hole coincides with the circle center of the disc, a guide hole is correspondingly formed in the sliding plate and is communicated with the clearance hole, a sliding groove is formed in the disc, the sliding plate is arranged in the sliding groove, a micrometer is arranged above the sliding plate, the micrometer is fixedly connected with the disc, the bottom of an adjusting rod on the micrometer abuts against the top of the sliding plate, a plurality of long adjusting holes are formed in the sliding plate, positioning holes are correspondingly formed in the disc, and adjusting screws penetrate through the adjusting holes and are in threaded connection with the positioning holes.

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