CN114211012A - Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig - Google Patents
Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig Download PDFInfo
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- CN114211012A CN114211012A CN202210049691.9A CN202210049691A CN114211012A CN 114211012 A CN114211012 A CN 114211012A CN 202210049691 A CN202210049691 A CN 202210049691A CN 114211012 A CN114211012 A CN 114211012A
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- 238000003754 machining Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000003672 processing method Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 description 3
- WBMKMLWMIQUJDP-STHHAXOLSA-N (4R,4aS,7aR,12bS)-4a,9-dihydroxy-3-prop-2-ynyl-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one hydrochloride Chemical compound Cl.Oc1ccc2C[C@H]3N(CC#C)CC[C@@]45[C@@H](Oc1c24)C(=O)CC[C@@]35O WBMKMLWMIQUJDP-STHHAXOLSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/4006—Gripping the work or tool by a split sleeve
- B23B31/4013—Details of the jaws
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Abstract
The invention provides an expansion type fixing jig for turning of an air cylinder barrel, which is used for fixing the air cylinder barrel under the driving of a power mechanism and matching with a machining machine tool to finish the chamfering turning of the air cylinder barrel and comprises an upper tool turret, an expansion clamp and an expansion ejector rod assembly, wherein the expansion clamp is sleeved on a main shaft of the upper tool turret; the invention also provides a processing method of the expansion type fixing jig, the expansion type fixing jig is inserted into the inner side of the cylinder barrel, under the driving of the power mechanism, the expansion ejector rod component moves forward to push the front end supporting part of the expansion clamp to expand from the inner side, and the cylinder barrel of the air cylinder is supported from the inner side; under the inside supports, machine tool can process cylinder both ends simultaneously, and the division incision and the division seam of inflation anchor clamps are sealed through flexible material packing, play the dual function of expansion contraction and sealed protection.
Description
Technical Field
The invention relates to the field of fixing jigs, in particular to an expansion type fixing jig for turning of a cylinder barrel and a machining method of the expansion type fixing jig.
Background
The cylinder barrel is of a cylindrical structure, chamfering processing needs to be carried out on two end faces during processing, in the prior art, a numerical control machine is usually adopted to clamp one end of the cylinder barrel and process the other end, then the other end of the cylinder barrel is clamped to carry out chamfering processing on the unprocessed end, and the processing efficiency is low and the processing cost is high; with the development of high speed, high efficiency and high precision of numerical control machine tools in recent years, the main shaft has high rotation precision, which also puts high requirements on a tool clamping system, and particularly shows various aspects of clamping rotation precision, dynamic balance performance, dynamic performance and the like, so that a novel precision tool clamping technology, namely a static pressure expansion type tool chuck, is produced accordingly.
As disclosed in the prior art, the expansion type automatic alignment grabbing clamp comprises a shaft, a sleeve, a reaming cone, an expansion reaming assembly, a telescopic cylinder, a positioning frame and a supporting frame, wherein the shaft is matched with a shaft hole of the sleeve, the shaft head is fixedly connected with the reaming cone, the tail part of the sleeve is fixedly connected with the positioning frame in a screwed manner, the tail end of the shaft is connected with a mandril connecting seat of the telescopic cylinder, the reaming cone is provided with an outer cone curved surface and an inner cone curved surface, the expansion reaming assembly comprises an expansion block and an elastic O-shaped ring, the expansion block is uniformly arranged on the periphery of the front end of the sleeve and is matched with a chute arranged on the section of the front end to slide along the radial direction, the elastic O-shaped ring is circumferentially sleeved in an annular groove arranged on the periphery of the front end of the sleeve and is matched with a groove arranged on the cylindrical surface on the outer side of the expansion block for limiting, the expansion reaming assembly is expanded outwards along the radial direction by utilizing the telescopic movement between the cylinder control shaft and the sleeve, the part of the small part with the counter bore is automatically expanded outwards to be aligned and clamped, and the small part can be mechanically grabbed and loaded and unloaded; expansion alignment and clamping are realized through the expansion block, and the expansion block is reset through the contraction of the elastic O-shaped ring; however, when the expansion block expands, gaps can appear between the clamp structures, dust, sundries and even scraps generated during machining are easy to wear the clamp through the gaps, and in the machining of the high-precision numerical control machine tool, the clamp wear can greatly affect the machining precision of parts, so that the product quality is affected.
Disclosure of Invention
The invention provides a closed type cylinder barrel turning expansion type fixing jig capable of realizing synchronous processing of two ends of a cylinder barrel, aiming at overcoming the defects in the prior art.
The invention further provides a machining method of the expansion type fixing jig for turning the cylinder barrel.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a cylinder barrel turning expansion type fixing jig is used for fixing a cylinder barrel under the driving of a power mechanism and is used for completing chamfering turning of the cylinder barrel in cooperation with a machining machine tool and comprises an upper tool turret, an expansion clamp and an expansion ejector rod assembly; the upper tool turret comprises a flange plate and a main shaft, the flange plate is connected with one end of the main shaft, and a first cavity is formed in the centers of the main shaft and the flange plate;
the expansion clamp is of a hollow structure and comprises a bottom end combining part, a middle splitting part and a front end supporting part which are sequentially connected, the expansion clamp is sleeved on the main shaft through the bottom end combining part, the middle splitting part at the front end of the bottom end combining part is provided with at least two splitting notches, at least two splitting cracks are arranged at the position, corresponding to the splitting notches, of the front end supporting part, the splitting cracks split the front end supporting part into at least two parts, the inner sides of the middle splitting part and the front end supporting part of the expansion clamp are in an inner conical shape, the splitting notches and the splitting cracks are filled through flexible materials, and a second cavity is arranged on the inner side of the front end supporting part;
the expansion ejector rod assembly comprises a bottom fixing part, a middle expansion ejector rod and a front end pushing part which are sequentially connected, the bottom fixing part and the middle expansion ejector rod are located in a first cavity, a connecting end connected with a power mechanism is arranged at the lower end of the bottom fixing part, the connecting end extends out of the first cavity, the front end pushing part is located in a second cavity, and the outer end face of the front end pushing part is an outer conical surface matched with an inner conical surface of the second cavity.
Preferably, the middle splitting part is provided with six splitting notches, the splitting seams are divided into six, and the front end supporting part is split into six blocks.
Preferably, the front end supporting part is step-shaped, the outer side surface of the front end supporting part is circular, the outer diameter of the supporting step of the front end supporting part is 1-10 mm smaller than the inner diameter of the cylinder barrel of the air cylinder, a cover plate is sleeved on the outer side of the step at the foremost end of the front end supporting part, and the cover plate is installed on the front end pushing part of the expansion ejector rod assembly.
Preferably, the support step outer diameter is 3mm smaller than the inner diameter of the cylinder bore.
Preferably, the flexible material adopts silica gel, the silica gel outside of splitting the incision is equipped with the protection of protective sheath.
Preferably, a plurality of annular grooves are formed in the front end and the rear end of the middle expansion ejector rod of the expansion ejector rod assembly, the distance between every two adjacent annular grooves is 8mm, and an O-shaped ring is arranged between the main shaft and the bottom end combining part of the expansion fixture.
Preferably, a positioning hole is formed in the side face of the flange plate of the upper turret, an oval first positioning sliding groove is formed in the bottom end fixing portion, and the bottom end fixing portion is positioned through a positioning screw.
Preferably, the front end face of the main shaft of the upper turret is provided with a positioning pin hole, the side face of the front end pushing part is provided with a second positioning groove, and the bottom end fixing part is positioned through a positioning screw.
Preferably, the upper tool turret is made of SCM435 type alloy structural steel, the expansion clamp is made of 65Mn type spring steel, and the expansion ejector rod assembly is made of SKD11 type alloy steel.
The machining method of the expansion type fixed jig for turning the cylinder barrel comprises a clamping mechanism and a turning mechanism of the cylinder barrel, and comprises the following steps:
s1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
s2: the turning mechanism drives the expansion type fixing jig to move forwards and insert into the cylinder barrel of the air cylinder;
s3: the power mechanism acts to drive the expansion ejector rod assembly to push forwards, the inner conical surface of the expansion clamp expands under the pushing of the front end pushing part, the expansion clamp expands radially, and the front end supporting part supports the cylinder barrel of the air cylinder from the inside;
s4: the turning mechanism acts, the expansion type fixing jig synchronously rotates, and the cylinder barrel of the air cylinder is machined;
s5: the power mechanism acts to drive the expansion ejector rod assembly to contract backwards, and the supporting part at the front end of the expansion clamp contracts back to the original shape under the action of the pretightening force of the expansion clamp and the tension of the flexible material;
s6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
Preferably, the machining method adopts two sets of expansion type fixing jigs for turning the cylinder barrel of the cylinder, the two sets of expansion type fixing jigs are oppositely arranged at two sides of the machining mechanism and are on the same axis, and the machining method comprises the following steps:
t1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
t2: the turning mechanism drives the two sets of expansion type fixing jigs to move forwards and respectively insert the two sets of expansion type fixing jigs into the cylinder barrel from two ends of the cylinder barrel;
t3: the power mechanism acts to drive the expansion ejector rod assemblies of the two expansion type fixing jigs to push forwards, the inner conical surface of the expansion jig is expanded under the pushing of the front end pushing part, the expansion jig expands in the radial direction, and the front end supporting part supports the cylinder barrel of the cylinder from the inside;
t4: the turning mechanism acts, and the two sets of expansion type fixing jigs synchronously rotate to complete the processing of the cylinder barrel of the cylinder;
t5: the power mechanism acts to drive the expansion ejector rod assemblies of the two expansion type fixing jigs to contract backwards, and the supporting part at the front end of the expansion jig contracts back to the original shape under the action of the pretightening force of the expansion jig and the tension of the flexible material;
t6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: the invention provides an expansion type fixing jig for turning of an air cylinder barrel, which is used for fixing the air cylinder barrel under the driving of a power mechanism and matching with a machining machine tool to finish the chamfering turning of the air cylinder barrel and comprises an upper tool turret, an expansion clamp and an expansion ejector rod assembly, wherein the expansion clamp is sleeved on a main shaft of the upper tool turret; the invention also provides a processing method of the expansion type fixing jig, the expansion type fixing jig is inserted into the inner side of the cylinder barrel, under the driving of the power mechanism, the expansion ejector rod component moves forward to push the front end supporting part of the expansion clamp to expand from the inner side, and the cylinder barrel of the air cylinder is supported from the inner side; under the inside support, the machine tool can process cylinder both ends simultaneously, and the division incision and the division seam of inflation anchor clamps are sealed through flexible material packing, play the dual function of expansion and contraction and sealed protection, have important promotion effect to the development of static pressure inflation formula cutter centre gripping technique.
Drawings
Fig. 1 is a schematic structural view of an expansion type fixing jig for turning of an air cylinder barrel in embodiment 1.
Fig. 2 is a schematic structural view of a turret on an expansion type fixing jig for turning of a cylinder barrel in embodiment 1.
Fig. 3 is a schematic structural view of an expansion fixture for an expansion-type fixture for turning an air cylinder barrel in embodiment 1.
Fig. 4 is a schematic structural view of an expansion ejector rod assembly of the expansion type fixing jig for turning of the cylinder barrel in embodiment 1.
Fig. 5 is a flowchart of a method for machining an expansion type fixing jig for turning a cylinder bore in embodiment 2.
Fig. 6 is a flowchart of a processing method of the two sets of expansion type fixing jigs for turning the cylinder barrels of the air cylinder in embodiment 2.
Fig. 7 is a schematic structural view of an expanding type fixing jig for a square workpiece in embodiment 3.
Fig. 8 is a schematic structural view of an expansion supporting surface of the square workpiece expansion type fixing jig in embodiment 3.
Wherein: 1. mounting a tool turret; 101. a flange plate; 1011. positioning holes; 102. a main shaft; 1021. a positioning pin hole; 103. a first cavity; 2. expanding the clamp; 201. a bottom end joint part; 202. a middle split portion; 2021. splitting the incision; 2022. splitting cracks; 203. a front end support portion; 2031. a second cavity; 3. an expansion ejector rod assembly; 301. a bottom end fixing part; 3011. a connecting end; 3012. a first positioning chute; 302. a middle expansion ejector rod; 3021. an annular groove; 303. a front end pushing part; 3031. a second positioning groove; 4. and (7) a cover plate.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the embodiment provides an expansion type fixing jig for turning an air cylinder barrel, which is driven by a power mechanism to fix the air cylinder barrel and is used for matching with a processing machine tool to complete chamfering and turning of the air cylinder barrel, and is characterized in that,
comprises an upper tool turret 1, an expansion clamp 2 and an expansion mandril component 3; as shown in fig. 2, the upper turret 1 comprises a flange 101 and a main shaft 102, the flange 101 is connected with one end of the main shaft 102, and a first cavity 103 is formed in the centers of the main shaft 102 and the flange 101;
as shown in fig. 3, the expansion clamp 2 is a hollow structure, and includes a bottom end combining portion 201, a middle splitting portion 202 and a front end supporting portion 203, which are connected in sequence, the expansion clamp 2 is sleeved on the main shaft 102 through the bottom end combining portion 201, the middle splitting portion 202 at the front end of the bottom end combining portion 201 is provided with at least two splitting notches 2021, the front end supporting portion 203 has at least two splitting notches 2022 corresponding to the splitting notches 2021, the splitting notches 2022 split the front end supporting portion 203 into at least two pieces, the inner sides of the middle splitting portion 202 and the front end supporting portion 203 of the expansion clamp 2 are in an inner cone shape, the splitting notches 2021 and the splitting notches 2022 are filled with a flexible material, and the inner side of the front end supporting portion 203 is provided with a second cavity 2031;
as shown in fig. 4, the expansion ram assembly 3 includes a bottom end fixing portion 301, a middle expansion ram 302 and a front end pushing portion 303 connected in sequence, the bottom end fixing portion 301 and the middle expansion ram 302 are located in the first cavity 103, a connecting end 3011 connected to the power mechanism is arranged at the lower end of the bottom end fixing portion 301, the connecting end 3011 extends out of the first cavity 103, the front end pushing portion 303 is located in the second cavity 2031, and an outer end surface of the front end pushing portion 303 is an outer conical surface matched with an inner conical surface of the second cavity 2031.
The middle split part 202 is provided with six split cuts 2021, the split slits 2022 are six, and the front support part 203 is split into six pieces.
The front end supporting part 203 is in a step shape, the outer side surface of the front end supporting part 203 is circular, the outer diameter of the supporting step of the front end supporting part 203 is 1-10 mm smaller than the inner diameter of the cylinder barrel of the cylinder, the cover plate 4 is sleeved on the outer side of the step at the foremost end of the front end supporting part 203, and the cover plate 4 is installed on the front end pushing part 303 of the expansion ejector rod assembly 3.
The outer diameter of the support step of the front end support 203 is smaller than the inner diameter of the cylinder tube by 3 mm.
It should be noted that, the step outer diameter and the cylinder bore inner diameter are the expansion distance of the expansion type fixing clamp, and the corresponding relation between the expansion distance and the radial expansion distance can be adjusted by adjusting the angles of the inner conical surface of the expansion clamp 2 and the front end pushing part 303 of the expansion ejector rod assembly 3, and the adjustment can be performed according to actual conditions.
The flexible material adopts silica gel, and the silica gel outside of splitting incision 2021 is equipped with the protection of protective sheath.
The flexible material has the functions of sealing and water proofing besides the expansion and contraction performance, and can effectively prevent cutting oil and chips from entering the clamp to damage the internal structure of the clamp in the machining process.
A plurality of annular grooves 3021 are formed in the front end and the rear end of the middle expansion ejector rod 302 of the expansion ejector rod assembly 3, the distance between every two adjacent annular grooves 3021 is 8mm, and an O-shaped ring is arranged between the main shaft 102 and the bottom end joint 201 of the expansion fixture 2.
It should be noted that, a lubricant is added between the expansion mandril assembly 3 and the first cavity 103 of the upper turret 1, so that the flexibility of the action of the expansion mandril assembly 3 is improved, the abrasion is avoided, and the annular groove 3021 has the function of enabling the lubricant to be uniformly and comprehensively filled in the first cavity 103, so that the lubricating effect is ensured; the O-ring is used to prevent lubricant leakage.
The side surface of the flange plate 101 of the upper turret 1 is provided with a positioning hole 1011, the bottom end fixing part 301 is provided with an oval first positioning chute 3012, and the bottom end fixing part 301 is positioned by a positioning screw.
It should be noted that the positioning hole 1011 is used for positioning the angle of the expansion top bar assembly 3, and the oval-shaped first positioning chute 3012 is provided to reserve a telescopic space for the positioning bolt.
The front end surface of the main shaft 102 of the upper turret 1 is provided with a positioning pin hole 1021, the side surface of the front end pushing part 303 is provided with a second positioning groove 3031, and the bottom end fixing part 301 is positioned by a positioning screw.
It should be noted that the angle of the positioning pin hole 1021 passing through the positioning front end pushing part 303, the depth of the second positioning slot 3031 and the length of the positioning pin hole 1021 are greater than the distance of the expansion ejector rod assembly 3 extending and retracting from front to back, and the positioning pin hole 1021 is always inserted into the second positioning slot 3031 during the extending and retracting process of the expansion ejector rod assembly 3.
Go up the tool turret 1 and adopt SCM435 type alloy structural steel, inflation anchor clamps 2 adopt 65Mn type spring steel, and inflation ejector pin subassembly 3 adopts SKD11 type alloy steel.
Example 2
As shown in fig. 5, the present embodiment provides a method for machining an expansion type fixture for turning an air cylinder barrel in embodiment 1, a machining tool includes a clamping mechanism and a turning mechanism of the air cylinder barrel, and the method includes the following steps:
s1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
s2: the turning mechanism drives the expansion type fixing jig to move forwards and insert into the cylinder barrel of the air cylinder;
s3: the power mechanism acts to drive the expansion ejector rod assembly 3 to push forwards, the inner conical surface of the expansion clamp 2 expands under the pushing of the front end pushing part 303, the expansion clamp 2 expands radially, and the front end supporting part 203 struts the cylinder barrel of the cylinder from the inside;
s4: the turning mechanism acts, the expansion type fixing jig synchronously rotates, and the cylinder barrel of the air cylinder is machined;
s5: the power mechanism acts to drive the expansion ejector rod assembly 3 to contract backwards, and the front end supporting part 203 of the expansion clamp 2 contracts back to the original shape under the action of the pretightening force of the expansion clamp 2 and the tension of the flexible material;
s6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
As shown in fig. 6, the machining method adopts two sets of expansion type fixing jigs for turning the cylinder barrel of the cylinder, the two sets of expansion type fixing jigs are oppositely arranged at two sides of the machining mechanism and are on the same axis, and the machining method comprises the following steps:
t1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
t2: the turning mechanism drives the two sets of expansion type fixing jigs to move forwards and respectively insert the two sets of expansion type fixing jigs into the cylinder barrel from two ends of the cylinder barrel;
t3: the power mechanism acts to drive the expansion ejector rod assemblies 3 of the two expansion type fixing jigs to push forwards, the inner conical surface of the expansion clamp 2 expands under the pushing of the front end pushing part 303, the expansion clamp 2 expands radially, and the front end supporting part 203 supports the cylinder barrel from the inside;
t4: the turning mechanism acts, and the two sets of expansion type fixing jigs synchronously rotate to complete the processing of the cylinder barrel of the cylinder;
t5: the power mechanism acts to drive the expansion ejector rod assemblies 3 of the two expansion type fixing jigs to contract backwards, and the front end supporting part 203 of the expansion jig 2 contracts back to the original shape under the action of the pretightening force and the flexible material tension of the expansion jig 2;
t6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
Example 3
As shown in fig. 7, this embodiment provides an expanding type fixture for square workpieces, which is different from embodiment 1, and is configured to fix the square workpieces under the driving of a power mechanism, so as to complete the chamfering and turning of the square workpieces in cooperation with a processing machine tool,
comprises an upper tool turret 1, an expansion clamp 2 and an expansion mandril component 3; the upper tool turret 1 comprises a flange plate 101 and a main shaft 102, wherein the flange plate 101 is connected with one end of the main shaft 102, and a first cavity 103 is formed in the centers of the main shaft 102 and the flange plate 101;
the expansion clamp 2 is of a hollow structure and comprises a bottom end combining part 201, a middle splitting part 202 and a front end supporting part 203 which are sequentially connected, the expansion clamp 2 is sleeved on the main shaft 102 through the bottom end combining part 201, the middle splitting part 202 at the front end of the bottom end combining part 201 is provided with at least two splitting notches 2021, the front end supporting part 203 is provided with at least two splitting notches 2022 corresponding to the splitting notches 2021, the front end supporting part 203 is split into at least two pieces by the splitting notches 2022, the inner sides of the middle splitting part 202 and the front end supporting part 203 of the expansion clamp 2 are in an inner cone shape, the splitting notches 2021 and the splitting notches 2022 are filled with flexible materials, and the inner side of the front end supporting part 203 is provided with a second cavity 2031;
the expansion ejector rod component 3 comprises a bottom fixing part 301, a middle expansion ejector rod 302 and a front end pushing part 303 which are sequentially connected, the bottom fixing part 301 and the middle expansion ejector rod 302 are located in the first cavity 103, a connecting end 3011 connected with a power mechanism is arranged at the lower end of the bottom fixing part 301, the connecting end 3011 extends out of the first cavity 103, the front end pushing part 303 is located in the second cavity 2031, and the outer end face of the front end pushing part 303 is an outer conical surface matched with an inner conical surface of the second cavity 2031.
The middle split part 202 is provided with four split notches 2021, the split slits 2022 are four, and the front support part 203 is split into four pieces.
The cross section of the inner side of the square workpiece is rectangular, the length is 165mm, and the width is 125 mm;
as shown in fig. 8, the thickness of the portion of the front end support 203 corresponding to the long side of the square structure is 20mm smaller than the thickness of the portion corresponding to the short side of the square structure;
the front end supporting part 203 is in a step shape, the outer side surface of the front end supporting part 203 is in a rectangular shape, and the distance between the outer arc surface of the supporting step of the front end supporting part 203 and the inner side surface of the square workpiece is 3 mm;
the outer side of the foremost step of the front end supporting part 203 is circular, a cover plate 4 is sleeved on the foremost step, and the cover plate 4 is installed on the front end pushing part 303 of the expansion push rod assembly 3.
The flexible material adopts silica gel, and the silica gel outside of splitting incision 2021 is equipped with the protection of protective sheath.
A plurality of annular grooves 3021 are formed in the front end and the rear end of the middle expansion ejector rod 302 of the expansion ejector rod assembly 3, the distance between every two adjacent annular grooves 3021 is 8mm, and an O-shaped ring is arranged between the main shaft 102 and the bottom end joint 201 of the expansion fixture 2.
The side surface of the flange plate 101 of the upper turret 1 is provided with a positioning hole 1011, the bottom end fixing part 301 is provided with an oval first positioning chute 3012, and the bottom end fixing part 301 is positioned by a positioning screw.
The front end surface of the main shaft 102 of the upper turret 1 is provided with a positioning pin hole 1021, the side surface of the front end pushing part 303 is provided with a second positioning groove 3031, and the bottom end fixing part 301 is positioned by a positioning screw.
Go up the tool turret 1 and adopt SCM435 type alloy structural steel, inflation anchor clamps 2 adopt 65Mn type spring steel, and inflation ejector pin subassembly 3 adopts SKD11 type alloy steel.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An expansion type fixing jig for turning an air cylinder barrel realizes the fixation of the air cylinder barrel under the drive of a power mechanism and is used for finishing the chamfering and turning of the air cylinder barrel by matching with a processing machine tool,
comprises an upper tool turret (1), an expansion clamp (2) and an expansion ejector rod assembly (3); the upper turret (1) comprises a flange plate (101) and a main shaft (102), the flange plate (101) is connected with one end of the main shaft (102), and a first cavity (103) is formed in the center of the main shaft (102);
the expansion clamp (2) is of a hollow structure and comprises a bottom end combining part (201), a middle splitting part (202) and a front end supporting part (203), the bottom end combining part (201) of the expansion clamp (2) is sleeved on the main shaft (102) through the bottom end combining part (201), the middle splitting part (202) at the front end of the bottom end combining part (201) is provided with at least two splitting notches (2021), the front end supporting part (203) is provided with at least two splitting notches (2022) corresponding to the splitting notches (2021), the splitting notches (2022) split the front end supporting part (203) into at least two parts, the inner sides of the middle splitting part (202) and the front end supporting part (203) of the expansion clamp (2) are in an inner cone shape, the splitting notches (2021) and the splitting notches (2022) are filled with a flexible material, and a second cavity (2031) is arranged on the inner side of the front end supporting part (203);
expansion ejector rod subassembly (3) are including bottom fixed part (301), middle part expansion ejector rod (302) and front end top push portion (303) that connect gradually, bottom fixed part (301) and middle part expansion ejector rod (302) are located first cavity (103), bottom fixed part (301) lower extreme has link (3011) of being connected with power unit, first cavity (103) are stretched out in link (3011), front end top push portion (303) are located second cavity (2031), and the outer terminal surface of front end top push portion (303) is for the outer conical surface with second cavity (2031) inner cone matched with.
2. The expansion type fixing jig for turning the cylinder barrel of the air cylinder according to claim 1, wherein six split notches (2021) are formed in the middle split portion (202), six split slits (2022) are formed in the middle split portion, and the front end supporting portion (203) is split into six blocks.
3. The expansion type fixing jig for turning the cylinder barrel of the air cylinder according to claim 2, wherein the front end supporting part (203) is in a step shape, the outer side surface of the front end supporting part (203) is circular, the outer diameter of the supporting step of the front end supporting part (203) is 1-10 mm smaller than the inner diameter of the cylinder barrel, a cover plate (4) is sleeved on the outer side of the step at the foremost end of the front end supporting part (203), and the cover plate (4) is installed on the front end pushing part (303) of the expansion ejector rod assembly (3).
4. The expansion type fixing jig for turning of the cylinder barrel of the air cylinder as claimed in claim 1, wherein the flexible material is silica gel, and a protective sleeve is arranged on the outer side of the silica gel of the split notch (2021).
5. The expansion type fixing jig for turning the cylinder barrel of the air cylinder as claimed in claim 1, wherein a plurality of annular grooves (3021) are formed in the front end and the rear end of the middle expansion ejector rod (302) of the expansion ejector rod assembly (3), the distance between every two adjacent annular grooves (3021) is 8mm, and an O-shaped ring is arranged between the main shaft (102) and the bottom end combining part (201) of the expansion fixture (2).
6. The expansion type fixing jig for turning the cylinder barrel of the air cylinder as claimed in claim 1, wherein a positioning hole (1011) is formed in the side face of the flange (101) of the upper turret (1), a first positioning sliding groove (3012) is formed in the bottom end fixing portion (301), and the bottom end fixing portion (301) is positioned through a positioning screw.
7. The expansion type fixing jig for turning the cylinder barrel of the air cylinder as claimed in claim 1, wherein a positioning pin hole (1021) is formed in the front end face of a main shaft (102) of the upper turret (1), a second positioning groove (3031) is formed in the side face of the front end pushing portion (303), and the bottom end fixing portion (301) is positioned through a positioning screw.
8. The expansion type fixing jig for turning the cylinder barrel of the air cylinder as claimed in claim 1, wherein the upper turret (1) is made of SCM435 type alloy structural steel, the expansion clamp (2) is made of 65Mn type spring steel, and the expansion ejector rod assembly (3) is made of SKD11 type alloy steel.
9. The processing method of the expansion type fixing jig for turning the cylinder barrel in the claim 1 is characterized in that the processing machine comprises a clamping mechanism and a turning mechanism of the cylinder barrel, and the processing method comprises the following steps:
s1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
s2: the turning mechanism drives the expansion type fixing jig to move forwards and insert into the cylinder barrel of the air cylinder;
s3: the power mechanism acts to drive the expansion ejector rod assembly (3) to push forwards, the inner conical surface of the expansion clamp (2) expands under the pushing of the front end pushing part (303), the expansion clamp (2) expands radially, and the front end supporting part (203) struts the cylinder barrel of the cylinder from the inside;
s4: the turning mechanism acts, the expansion type fixing jig synchronously rotates, and the cylinder barrel of the air cylinder is machined;
s5: the power mechanism acts to drive the expansion ejector rod assembly (3) to contract backwards, and the front end supporting part (203) of the expansion clamp (2) contracts back to the original shape under the action of the pretightening force of the expansion clamp (2) and the tension of the flexible material;
s6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
10. The processing method of the expansion type fixing jig for the turning of the cylinder barrel according to claim 9, wherein two sets of expansion type fixing jigs for the turning of the cylinder barrel are adopted in the processing method, are oppositely arranged on two sides of the processing mechanism and are on the same axis, and the processing method comprises the following steps:
t1: the clamping mechanism clamps the cylinder barrel and clamps the cylinder barrel to the front of the expansion type fixing jig;
t2: the turning mechanism drives the two sets of expansion type fixing jigs to move forwards and respectively insert the two sets of expansion type fixing jigs into the cylinder barrel from two ends of the cylinder barrel;
t3: the power mechanism acts to drive the expansion ejector rod assemblies (3) of the two expansion type fixing jigs to push forwards, the inner conical surface of the expansion clamp (2) expands under the pushing of the front end pushing part (303), the expansion clamp (2) expands radially, and the front end supporting part (203) supports the cylinder barrel of the air cylinder from the inside;
t4: the turning mechanism acts, and the two sets of expansion type fixing jigs synchronously rotate to complete the processing of the cylinder barrel of the cylinder;
t5: the power mechanism acts to drive the expansion ejector rod assemblies (3) of the two expansion type fixing jigs to contract backwards, and the front end supporting part (203) of the expansion jig (2) contracts back to the original shape under the action of the pretightening force of the expansion jig (2) and the tension of the flexible material;
t6: the clamping mechanism clamps the cylinder barrel of the cylinder and puts the cylinder barrel back to the original position, and machining is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049691.9A CN114211012A (en) | 2022-01-17 | 2022-01-17 | Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049691.9A CN114211012A (en) | 2022-01-17 | 2022-01-17 | Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114211012A true CN114211012A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210049691.9A Pending CN114211012A (en) | 2022-01-17 | 2022-01-17 | Expansion type fixing jig for turning of cylinder barrel and machining method of expansion type fixing jig |
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| Country | Link |
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| CN (1) | CN114211012A (en) |
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