CN112475983A - Positioning fixture for clamping precision casting - Google Patents
Positioning fixture for clamping precision casting Download PDFInfo
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- CN112475983A CN112475983A CN202011613670.2A CN202011613670A CN112475983A CN 112475983 A CN112475983 A CN 112475983A CN 202011613670 A CN202011613670 A CN 202011613670A CN 112475983 A CN112475983 A CN 112475983A
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- clamping
- precision casting
- vertical
- positioning fixture
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- 238000005495 investment casting Methods 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 15
- 238000009825 accumulation Methods 0.000 abstract description 7
- 206010063659 Aversion Diseases 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention belongs to the technical field of fixture tools, and particularly relates to a positioning fixture for clamping a precision casting, which comprises a base, wherein a vertical pressing mechanism and a transverse pressing mechanism are arranged on the base; the vertical pressing mechanism presses the upper end face and the lower end face of the part to be processed to limit the vertical movement of the part to be processed; the utility model discloses a precision machining device, including horizontal hold-down mechanism, vertical hold-down mechanism, restriction mechanism, vertical running, the cooperation makes the part clamping firm, avoid in the machining process, the part takes place horizontal and vertical aversion, this device simple structure, solved in the machining process, the part takes place horizontal or vertical aversion easily, thereby need adopt the lathe to carry out clamping many times, the accumulation that leads to the clamping error easily causes the problem of part out of tolerance.
Description
Technical Field
The invention belongs to the technical field of clamp tools, and particularly relates to a positioning clamp for clamping a precision casting.
Background
For the machining of a large precision casting for a spacecraft, because the shape is complex, the standards are related to each other, the requirement on the precision of a drawing is high, the clamping difficulty in machining is high, especially the hole sites at the assembly positions at two ends are machined, the requirements on the position size and the form and position tolerance are high, when the end part of a part is machined, in order to ensure the machining precision, the transverse movement of the part needs to be prevented, so that when the part is clamped, a clamping tool for limiting the transverse movement of the part is mainly adopted, when the part is machined on the outer surface part of the part, the part needs to be prevented from vertically moving, so that when the part is clamped, a clamping tool for limiting the vertical movement of the part is mainly adopted, so that when the part is actually machined, a machine tool needs to be used for clamping for multiple times, the out-of-tolerance is easily caused by the accumulation of clamping errors, and in, vertical and horizontal aversion can be prevented from taking place among the part machining process, can accomplish the processing of this part major dimension at a clamping to avoid the risk that should the accumulation of many times clamping error cause the part super poor.
Disclosure of Invention
The invention aims to: the positioning fixture for precision casting clamping is used for solving the problem that parts are out of tolerance due to accumulation of clamping errors easily caused by repeated clamping by a machine tool due to the fact that parts are prone to transverse or vertical displacement in the machining process.
In order to achieve the purpose, the invention adopts the technical scheme that:
the positioning fixture for clamping the precision casting comprises a base, wherein a vertical pressing mechanism and a transverse pressing mechanism are arranged on the base; the vertical pressing mechanism presses the vertical end face of the part to be processed to limit the vertical movement of the part to be processed; the transverse pressing mechanism abuts against the transverse end of the part to be processed and is used for limiting the transverse movement of the part to be processed.
A vertical pressing mechanism and a transverse pressing mechanism are arranged on the base of the positioning clamp, the vertical pressing mechanism acts on the upper end surface and the lower end surface of the precision casting to vertically press the precision casting, thereby limiting the vertical movement of the precision casting during processing, abutting against the end part of the precision casting along the transverse action through the transverse pressing mechanism, thereby limiting the transverse movement of the precision casting during processing, ensuring the stable clamping of the parts through the matching of the vertical pressing mechanism and the transverse pressing mechanism, avoiding the transverse and vertical displacement of the parts during the machining process, therefore, the device realizes the processing of each part of the part on one station, reduces the processing period, has simple structure, solves the problem that the part is easy to shift horizontally or vertically in the mechanical processing process, therefore, a machine tool is required to clamp for multiple times, and the problem that the tolerance of parts is out of tolerance due to accumulation of clamping errors is easily caused.
Preferably, vertical hold-down mechanism includes apron, first support and stud, wherein, first support and stud set up on the base, the apron stack in on the first support, just the apron is connected with stud and is formed locking mechanism. First support and stud set up on the base, and the apron stacks on first support, will wait to process the part and arrange in between apron and the first support, through stud locking apron, makes the vertical fixed of part to avoid the effect of vertical removal in the part machining process.
Preferably, the studs are circumferentially and uniformly distributed along the outer side of the first support. The cover plate is vertically locked through the double-end stud, so that stress on each part of the part is uniform, the part is uniformly compressed through the cover plate, and the clamping of the part to be machined and the influence of clamping on the overall dimension of the machined part are favorably reduced.
Preferably, each stud's upper portion all is equipped with the screw thread end, be equipped with the through-hole with stud's screw thread end adaptation on the apron, screw thread end and through-hole adopt bolted connection. The part is placed between the cover plate and the first support, the upper threaded end of the stud is inserted into the through hole of the cover plate, the threaded end is connected with the through hole through a bolt, and the part is vertically compressed by screwing the bolt along the threaded end of the stud.
Preferably, the lower end face of the cover plate is fitted and matched with the upper end face of the part to be processed, and the upper end face of the first support is fitted and matched with the lower end face of the part to be processed. The contact area between the part to be processed and the first support and the cover plate is increased, so that the extrusion force on each part of the part is uniform, and the clamping deformation of the part to be processed is reduced.
Preferably, the transverse pressing mechanism comprises a second support and a pushing block, the second support is fixedly arranged on the base, the pushing block is stacked on the second support, and the pushing block is connected with the second support in a sliding mode. According to the bayonet position of the part to be machined, the position of the push block is adjusted along the second support, the part to be machined with various specifications can be tightly propped against, and therefore the application range of the clamp is expanded.
Preferably, the second support is provided with a screw hole, the push block is provided with a step through groove, the step through groove and the screw hole are arranged in a relative position, a screw penetrates through the step through groove, the tail of the screw is inserted into the screw hole, and the head of the screw presses the step surface of the step through groove. After the push block moves in place, the screw penetrates through the step through groove, the screw is rotated, the end portion of the screw is inserted into the screw hole, and the head portion of the screw presses the step surface of the step through groove to limit the movement of the push block, so that the effect of positioning the push block relative to the second support is achieved.
Preferably, the side end face of the push block is fitted with the end of the part to be processed. The contact area of the bayonet of the part to be processed and the push block is increased, the contact area of the push block and the part to be processed is increased, meanwhile, the extrusion force applied to the part is uniform, and the effect of reducing the deformation of the part to be processed is achieved.
Preferably, the base is a circular truncated cone, a plurality of first limiting holes are formed in the circular truncated cone, second limiting holes are formed in the first support and the second support respectively, and the first limiting holes in the circular truncated cone are arranged opposite to the second limiting holes in the first support and the second support respectively. The first limiting hole and the second limiting hole are correspondingly arranged, the positioning pin is arranged in the first limiting hole, and the first support and the second support are quickly positioned on the base through the positioning pin which is arranged in the second limiting hole in a penetrating mode.
Preferably, a plurality of first bolt through holes are formed in the circular truncated cone, second threaded holes are formed in the first support and the second support respectively, and the first bolt through holes in the circular truncated cone are arranged opposite to the second threaded holes in the support and the second support respectively. The first bolt through hole and the second bolt hole are oppositely arranged, a bolt is arranged in the first bolt through hole, and the first bolt through hole and the second bolt hole are connected through the bolt, so that the first support and the second support are fixed on the base.
Compared with the prior art, the invention has the advantages that: in the application, a base of the positioning clamp is provided with a vertical pressing mechanism and a transverse pressing mechanism, the vertical pressing mechanism acts on the upper end surface and the lower end surface of the precision casting to vertically press the precision casting, thereby limiting the vertical movement of the precision casting during processing, abutting against the end part of the precision casting along the transverse action through the transverse pressing mechanism, thereby limiting the transverse movement of the precision casting during processing, ensuring the stable clamping of the parts through the matching of the vertical pressing mechanism and the transverse pressing mechanism, avoiding the transverse and vertical displacement of the parts during the machining process, therefore, the device realizes the processing of each part of the part on one station, reduces the processing period, has simple structure, solves the problem that the part is easy to shift horizontally or vertically in the mechanical processing process, therefore, a machine tool is required to clamp for multiple times, and the problem that the tolerance of parts is out of tolerance due to accumulation of clamping errors is easily caused.
Other beneficial effects of this application are:
1. first support and stud are fixed to be set up on the base, and the apron stacks on first support, will wait to process the part and arrange in between apron and the first support, through stud locking apron, makes the part vertical fixed to avoid the effect of vertical removal in the part machining process.
2. The cover plate is vertically locked through the double-end stud, so that stress on each part of the part is uniform, the part is uniformly compressed through the cover plate, and the clamping of the part to be machined and the influence of clamping on the overall dimension of the machined part are favorably reduced.
3. The part is placed between the cover plate and the first support, the upper threaded end of the stud is inserted into the through hole of the cover plate, the threaded end is connected with the through hole through a bolt, and the part is vertically compressed by screwing the bolt along the threaded end of the stud.
4. The contact area between the part to be processed and the first support and the cover plate is increased, so that the extrusion force on each part of the part is uniform, and the clamping deformation of the part to be processed is reduced.
5. According to the bayonet position of the part to be machined, the position of the push block is adjusted along the second support, the part to be machined with various specifications can be tightly propped against, and therefore the application range of the clamp is expanded.
6. After the push block moves in place, the screw penetrates through the step through groove, the screw is rotated, the end portion of the screw is inserted into the screw hole, and the head portion of the screw presses the step surface of the step through groove to limit the movement of the push block, so that the effect of positioning the push block relative to the second support is achieved.
7. The contact area of the bayonet of the part to be processed and the push block is increased, the contact area of the push block and the part to be processed is increased, meanwhile, the extrusion force applied to the part is uniform, and the effect of reducing the deformation of the part to be processed is achieved.
8. The first limiting hole and the second limiting hole are correspondingly arranged, the positioning pin is arranged in the first limiting hole, the positioning pin penetrates through the second limiting hole, the first support and the second support are quickly positioned on the base, the first bolt through hole and the second bolt hole are oppositely arranged, the bolt is arranged in the first bolt through hole, the first bolt through hole and the second bolt hole are connected through the bolt, and the first support and the second support are fixed on the base.
Drawings
FIG. 1 is a schematic structural view of a positioning fixture for clamping a precision casting according to the invention;
FIG. 2 is a schematic view of the structure of the base and the second pedestal mounting;
FIG. 3 is a schematic structural view of a push block;
fig. 4 is a cross-sectional view of the first and second holders mounted on the base.
Reference numerals
The device comprises a base 1, a limiting hole 1a, a first bolt through hole 1b, a positioning pin 1c, a bolt 1d, a vertical pressing mechanism 2, a cover plate 2a, a through hole 2a1, a first support 2b, a stud 2c, a transverse pressing mechanism 3a, a second support 3a, a screw hole 3a1, a push block 3b and a through groove 3b 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in attached drawings 1, 2, 3 and 4, after a positioning clamp clamps a precision casting, the precision casting is installed on a five-axis machine tool through a base 1, a vertical pressing mechanism 2 and a transverse pressing mechanism 3 are arranged on the base 1 of the positioning clamp, the vertical pressing mechanism 2 acts on the upper end surface and the lower end surface of the precision casting to vertically press the precision casting, so that the vertical movement of the precision casting caused by vertical acting force when holes at two ends of the precision casting are machined is avoided, the end part of the precision casting is tightly pressed along the transverse action through the transverse pressing mechanism 3, the transverse movement of the precision casting during machining is limited, the transverse movement of the precision casting caused by the transverse acting force when the outer end surface of a bayonet of the precision casting is machined is avoided, the clamping of the part is stabilized through the matching of the vertical pressing mechanism 2 and the transverse pressing mechanism 3, and the transverse and vertical displacement of the part is avoided during machining, the device has the advantages that the processing of each part of the part on one station is realized, the processing period is shortened, the device is simple in structure, the problem that the part is prone to transverse or vertical displacement in the machining process is solved, a machine tool is required to be used for clamping for multiple times, and the problem that the accumulation of clamping errors causes the out-of-tolerance of the part easily is solved.
Place the part between apron 2a and first support 2b, stud 2 c's upper portion screw thread end inserts in apron 2 a's through-hole 2a1, stud's screw thread end and through-hole 2a1 adopt bolted connection, screw the bolt through the screw thread end along stud 2c, realize vertical pressure part, apron 2 a's lower terminal surface and the up end laminating adaptation of waiting to process the part, first support 2b up end is suitable the cooperation with the lower terminal surface subsides of waiting to process the part, improve the area of contact of waiting to process the part and first support 2b and apron 2a, thereby make the extrusion force that each position of part received even, have the effect that reduces the part centre gripping of waiting to process and warp.
According to the bayonet position of the part to be processed, the position of the push block 3b is adjusted along the second support 3a, the part to be processed with various specifications can be abutted tightly, so that the application range of the clamp is expanded, after the push block 3b moves to the right position, a screw is arranged in the step through groove 3b1 in a penetrating mode, the screw is rotated, the end portion of the screw is inserted into the screw hole 3a1, and the head portion of the screw presses the step surface of the step through groove 3b1 to limit the movement of the push block 3b, so that the effect of positioning the push block 3b relative to the second support 3a is achieved.
The side end face of the push block 3b is matched with the end part of the part to be processed in a fitting manner, so that the contact area between the bayonet of the part to be processed and the push block 3b is increased, the contact area between the push block 3b and the part to be processed is increased, the extrusion force applied to the part is uniform, and the deformation of the part to be processed is reduced.
The base 1 of the positioning fixture is a circular truncated cone body, a plurality of first limiting holes 1a are arranged on the circular truncated cone body, second limiting holes are respectively arranged on a first support 2b and a second support 3a, the first limiting holes 1a are correspondingly arranged with the second limiting holes, positioning pins 1c are arranged in the first limiting holes 1a, the first support 2b and the second support 3a are quickly positioned on the base 1 by penetrating the positioning pins 1c into the second limiting holes, a plurality of first bolt through holes 1b are also arranged on the circular truncated cone body, second threaded holes are respectively arranged on the first support 2b and the second support 3a, the first bolt through holes 1b are correspondingly arranged with the second threaded holes, the first bolt through holes 1b are oppositely arranged with the second bolt through holes, bolts 1d are arranged in the first bolt through holes 1b, and the first bolt through holes 1b are connected with the second bolt holes through bolts 1d, the first holder 2b and the second holder 3a are fixed to the base 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A positioning fixture for precision casting clamping, including base (1), its characterized in that: the base (1) is provided with a vertical pressing mechanism (2) and a transverse pressing mechanism (3); the vertical pressing mechanism (2) presses the vertical end face of the part to be processed to limit the vertical displacement of the part to be processed; the transverse pressing mechanism (3) abuts against the transverse end of the part to be processed and is used for limiting the transverse displacement of the part to be processed.
2. The positioning fixture for clamping the precision casting according to claim 1, characterized in that: vertical hold-down mechanism (2) are including apron (2 a), first support (2 b) and stud (2 c), wherein, first support (2 b) and stud (2 c) set up on base (1), apron (2 a) stack in on first support (2 b), just apron (2 a) are connected with the upper end of stud (2 c) and are formed locking mechanism.
3. The positioning fixture for precision casting clamping according to claim 2, characterized in that: the stud bolts (2 c) are circumferentially and uniformly distributed along the outer side of the first support (2 b).
4. The positioning fixture for precision casting clamping according to claim 3, wherein: be equipped with on apron (2 a) through-hole (2 a 1) with the screw thread end adaptation of stud (2 c), stud (2 c) with through-hole (2 a 1) on apron (2 a) adopt bolted connection.
5. The positioning fixture for clamping the precision casting according to claim 4, characterized in that: the lower end face of the cover plate (2 a) is in fit with the upper end face of the part to be processed, and the upper end face of the first support (2 b) is in fit with the lower end face of the part to be processed.
6. The positioning fixture for clamping the precision casting according to claim 5, characterized in that: the transverse pressing mechanism (3) comprises a second support (3 a) and a pushing block (3 b), the second support (3 a) is arranged on the base (1), the pushing block (3 b) is stacked on the second support (3 a), and the pushing block (3 b) is connected with the second support (3 a) in a sliding mode.
7. The positioning fixture for clamping the precision casting according to claim 6, characterized in that: be equipped with screw hole (3 a 1) on second support (3 a), be equipped with the logical groove of step (3 b 1) on ejector pad (3 b), the relative position setting of logical groove of step (3 b 1) and screw hole (3 a 1) wear to adorn the screw in the logical groove of step (3 b 1), make the afterbody of screw inserts in screw hole (3 a 1), just the head of screw compresses tightly the step face that the logical groove of step (3 b 1).
8. The positioning fixture for clamping the precision casting according to claim 7, characterized in that: the side end face of the push block (3 b) is fit with the end part of the part to be processed.
9. The positioning fixture for clamping the precision casting according to any one of claims 8, characterized in that: the base (1) is a circular truncated cone body, a plurality of first limiting holes (1 a) are formed in the circular truncated cone body, second limiting holes are formed in the first support (2 b) and the second support (3 a) respectively, and the first limiting holes in the circular truncated cone body are arranged in a mode of being opposite to the second limiting holes in the first support (2 b) and the second support (3 a) respectively.
10. The positioning fixture for clamping the precision casting according to claim 8, characterized in that: the round table is provided with a plurality of first bolt through holes (1 b), the first support (2 b) and the second support (3 a) are respectively provided with a second threaded hole, and the first bolt through holes (1 b) in the round table are respectively opposite to the second threaded holes in the supports (2 b) and the second support (3 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613670.2A CN112475983B (en) | 2020-12-30 | 2020-12-30 | Positioning fixture for clamping precision casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613670.2A CN112475983B (en) | 2020-12-30 | 2020-12-30 | Positioning fixture for clamping precision casting |
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| Publication Number | Publication Date |
|---|---|
| CN112475983A true CN112475983A (en) | 2021-03-12 |
| CN112475983B CN112475983B (en) | 2024-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011613670.2A Active CN112475983B (en) | 2020-12-30 | 2020-12-30 | Positioning fixture for clamping precision casting |
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| CN112475983B (en) | 2024-07-23 |
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Country or region after: China Address after: 618400 Shifang Economic Development Zone, Deyang City, Sichuan Province (Lingjie Park) Applicant after: Sichuan Xinhang Titanium Technology Co.,Ltd. Address before: 618400 Shifang Economic Development Zone, Deyang City, Sichuan Province (Lingjie Park) Applicant before: SICHUAN FUTURE AEROSPACE INDUSTRIAL Co.,Ltd. Country or region before: China |
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